Plastic bevel gear

The invention provides a plastic bevel gear which has the characteristics that not only can the fatigue strength resistant of a tooth root be improved, but also the impact-resistant property is not influenced. For the formation of an non-meshed side tooth profile curved surface, a first base cylindrical surface of the bevel gear is drawn up with the radius of a line segment rbc; a first generating plane is tagent to the first base cylindrical surface; an included angle between a first line segment on the first generating plane and the axis of a first base cylinder is beta bc, when the first generating plane performs pure rolling without sliding along the first base cylindrical surface, the track of the first line segment is an non-meshed side tooth profile curved surface; for the formation of a meshed side tooth profile curved surface, a second base cylindrical surface of the bevel gear is drawn up with the radius of a line segment rbd, wherein rbc/rbd=1-1.36; and when a second generating ...

Hydraulic fine feed apparatus with improved ability of radial stiffness

The invention relates to a hydraulic pressure type micro feeding device capable of enhancing the radial stiffness used in the ultra precision machining, which belongs to the field of mechanical machining, and through which the resolving capability for micro feeding of the machine tool cutter can be enhanced, the ultra-thin cutting of the ultra precision machine tool, the high-precision size processing and the online error compensation are realized. The micro feeding device is characterized in that the radial cross sheet spring with the thickness of h, the width of B, the overhanging length of k and the inner diameter of the hole of Phi d is added to the original hydraulic pressure type micro feeding device; and the micro feeding device adopts the radial bearing effect of the cross sheet spring at the front end of the thin-wall columned cylinder body so as to achieve the purpose of enhancing the radial stiffness of the hydraulic pressure type micro feeding device. The hydraulic pressure ...

Involute helical gear

The invention provides an involute helical gear capable of enhancing the fatigue resistance of a gear root and basically having no influence on the shock resistance of the involute helical gear, which is characterized in that a first base cylinder surface of the involute helical gear is drawn with a line segment rbc as a radius; a first generating plane is tangential to the first base cylinder surface; the included angle beta bc between a first line segment on the first generating plane and the axis of a first base cylinder is not equal to 0; when the first generating plane makes pure rolling without sliding along the first base cylinder surface, the track of the first line segment is a right side tooth surface of the involute helical gear; a second base cylinder surface of the involute helical gear is drawn with a line segment rbd as a radius, and the ratio of the rbc to the rbd is equal to 1-1.36; a second generating plane is tangential to the second base cylinder surface; the included ...

Novel environment -friendly well head sampler

The utility model provides a novel environment -friendly well head sampler, including the body, overlap at outside the changeed cover of body, the below that can change the cover is equipped with the glib talker, the body is one end open -ended cavity, the axle is sealed up to this internal being equipped with, sealed shaft extension body opening one end is connected with the handle, be equipped with the sealing washer between sealed axle and the body, the sealed epaxial case that is equipped with can communicate or block the body with glib. The utility model discloses a novel environment -friendly well head sampler has rational in infrastructure, safe in utilization, simple operation, seals advantages such as effectual, during on -the -spot installation, need not the compulsory position of adjusting glib hole with oil pipe threaded connection, and 360 degrees available hands of scope in the glib hole of this sampler rotate the adjustment at will, make its glib vertical sampling container ...

Wheeled cutting machine

The utility model provides a wheeled cutting machine, including motor, abrasive cutoff piece, handle, protective housing, switch, V belt and removal structure, its innovation point lies in: remove the structure and include automobile body and wheel, automobile body and wheel fixed connection, the abrasive cutoff piece is installed in the front end of this automobile body, passes through the bolt and nut hookup with the automobile body, power switch sets up in the intermediate position department of automobile body in the department of end nearby of automobile body, wheel, and passes through the antifriction bearing hookup with the automobile body, the motor is in the nearly rear end department of automobile body, and the axle of motor is connected through the V belt and the axle of abrasive cutoff piece, realizes the transmission of power. The utility model discloses a cutting machine is applicable to very much needs cut material removal inconveniently, cutting position to be difficult ...

Tool with micro-feed function and method thereof

The invention relates to a tool with a micro-feed function, which can be used in ultra-precision machining to improve the micro-feed resolution of a machine tool and realize ultrathin cutting and high-precision dimension machining on an ultra-precision machine tool. The tool with the micro-feed function is characterized in that a purpose-made cylinder body is installed on a tool rest, and the required micro-feed is realized through the elastic deformation of the lower end surface of the cylinder under the oil pressure of the cylinder body. By accurately controlling oil pressure inside the cylinder body, the accurate micro-feed can be obtained to realize the corresponding precision feed. The tool with the micro-feed function integrates a tool bar and a cylinder body with the micro-feed function into a whole, is free of intermediate driving parts, has the characteristics of compact structure, excellent input-output linearity, high rigidity, large stroke, high resolution, low production cost ...

Realize device of multi -functional processing of horizontal lathe

The utility model provides a realize device of multi -functional processing of horizontal lathe, including the horizontal lathe body, at the left and right sides of this horizontal lathe's lathe bed the same left stand and right stand of symmetrical fixedly connected with structure respectively, left stand and right stand top flush has erect the beam guideway, erect respectively on the beam guideway can left right translation cutter head slide and the bistrique slide that self is provided with hand wheel A and handle A, set up the cutter head on the cutter head slide, the bistrique slide is put on the shelf and is equipped with the bistrique connecting plate, and this bistrique connecting plate is connected with the bistrique. The utility model discloses a device, generally, the left and right sides of horizontal lathe's lathe bed some left stand and right stands, the stand top is equipped with the beam guideway, is equipped with cutter head slide and bistrique slide on the beam guideway ...

Method for testing performance of HSK tool system and its device

Hydraulic system and method for hydraulic plunger pump bearing flushing

The invention discloses a hydraulic system and method for hydraulic plunger pump bearing flushing. Hydraulic oil output by a circulating filtration pump passes through a first one-way valve, a filter and an outlet of a cooler to be divided into two oil branches, one oil branch passes through a second one-way valve to return to an oil tank, the other oil branch passes through a U opening of a hydraulic plunger pump and then returns to the oil tank from an L opening of the hydraulic plunger pump, a first pressure gauge is used for detecting the pressure of a circulation flushing oil system, a second pressure gauge is used for detecting the system pressure of an outlet of the high-pressure plunger pump, a pilot overflow valve serves as a safety valve of the high-pressure plunger pump, and a third one-way valve is used for preventing oil backflow caused by overload. According to the hydraulic system and method for hydraulic plunger pump bearing flushing, the operating temperature of a spindle ...

Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery

The invention discloses an electro-hydraulic energy recovery and release system for slewing brake of engineering machinery. The electro-hydraulic energy recovery and release system comprises an energy recovery and release mechanism and a control unit. The control unit comprises a controller and a first pressure sensor. The energy recovery and release mechanism comprises a hydraulic energy storage unit, an electromagnetic reserving valve, a hydraulic motor, a sequence valve, a first check valve and a second check valve. Kinetic energy generated during slewing brake of the engineering machinery can be stored by the hydraulic energy storage unit, the controller controls the electromagnetic reversing valve to release the energy stored in the hydraulic energy storage unit according to the load of a main variable pump so as to drive the hydraulic motor to provide a torque to the main variable pump, and thus fuel oil consumption of an engine is reduced and work efficiency of the engineering machinery ...

Hydraulic fine feed apparatus with improved ability of radial stiffness

The invention relates to a hydraulic pressure type micro feeding device capable of enhancing the radial stiffness used in the ultra precision machining, which belongs to the field of mechanical machining, and through which the resolving capability for micro feeding of the machine tool cutter can be enhanced, the ultra-thin cutting of the ultra precision machine tool, the high-precision size processing and the online error compensation are realized. The micro feeding device is characterized in that the radial cross sheet spring with the thickness of h, the width of B, the overhanging length ofk and the inner diameter of the hole of Phi d is added to the original hydraulic pressure type micro feeding device; and the micro feeding device adopts the radial bearing effect of the cross sheet spring at the front end of the thin-wall columned cylinder body so as to achieve the purpose of enhancing the radial stiffness of the hydraulic pressure type micro feeding device. The hydraulic pressure type ...

Energy-saving and environment-friendly type automatic power-driven oil extraction machine

An energy-saving and environment-friendly type automatic power-driven oil extraction machine comprises a round fixing tray, a fixing rack, a truncated cone-shaped oscillator, a driver, a variable-frequency motor and a hemispheric flexible container, wherein the fixing rack, the truncated cone-shaped oscillator and the driver are connected with the round fixing tray through rivets; the lower end of the driver is in collision contact with the truncated cone-shaped oscillator through an oscillation ball; the upper section of the driver is inserted into the hemispheric flexible container through the bottom surface center of the hemispheric flexible container; the variable-frequency motor is connected with the driver through rivets; and the hemispheric flexible container is connected with the fixing rack through rivets. The energy-saving and environment-friendly type automatic power-driven oil extraction machine has a reasonable and novel structure, multiple functions, high degree of mechanization ...

Equipment and method for directly depredating straw raw material in methane tank

The invention discloses a device for directly degrading straw raw materials in a biogas generating pit and a method thereof. The device comprises a water-permeable interlayer (1), and a plurality of air ducts (4) of air outlets (5) arranged at the upper part of the water-permeable interlayer (1), wherein, the straw raw materials (6) and fermentation inocula are arranged above the air ducts (4), fermentation liquor (7) is arranged at the lower part of the water-permeable interlayer (1), the fermentation liquor (7) is connected with a circulating pump (8), a spray pipe (10) with a nozzle (9) is connected on the circulating pump (8), and the spray pipe (10) is arranged above the straw raw materials (6). Biogas is generated by the following steps: the straw raw materials are put into the biogas generating pit and added with the fermentation inocula, the carbon-nitrogen ratio and the concentration of the fermentation liquor are adjusted, the fermentation liquor is sprayed on the straw raw materials ...

Organic microorganism-containing ecological fertilizer and production method thereof

The invention discloses an organic microorganism-containing ecological fertilizer and a production method thereof. The ecological fertilizer consists of a three-layer structure, an inner layer is made of compound fertilizer granules, an urease inhibitor and nitrification inhibitor coating is used as a middle layer, an outer layer is made of an organic microorganism coating agent prepared by using an active bacteria packing method; and the production method comprises the steps of mixing and granulating, inhibitor coating, and organic microorganism coating. The production method disclosed by the invention is simple, and a prepared ecological fertilizer is complete in nutrients, ensures a high survival rate due to mixed bacterial manures, ensures long survival time of effective living bacteria, has sufficient inorganic nutrients, is convenient to apply, can avoid topdressing, and promotes the development of non-toxic and harmless fertilizers; and the ecological fertilizer has an obvious antagonism ...

Method and system for continuously preparing para-aramid polymer

The invention provides a method and a system for continuously preparing a para-aramid polymer. The method for preparing the para-aramid polymer comprises the following steps: (1) preparing raw materials; (2) mixing and pre-polymerizing: mixing all the p-phenylenediamine reaction liquid with all or part of the terephthaloyl chloride reaction liquid and/or molten terephthaloyl chloride in a rotating packed bed reactor, and then pumping the mixture into a pre-polymerization reactor by using a single screw pump to carry out pre-polymerization reaction to obtain a reaction liquid A; (3) final polymerization: feeding the reaction liquid A and the possibly existing residual terephthaloyl chloride reaction liquid and/or molten terephthaloyl chloride into a screw reactor or a tank reactor for final polymerization reaction to generate a product B; and (4) post-treatment. The production efficiency is high, heating is uniform, side reactions are few, the viscosity and other properties of a polymer ...

Agricultural marsh gas control box

The invention relates to a marsh gas control box, in particular to an agricultural marsh gas control box. The agricultural marsh gas control box comprises a direct current power source, a temperature (T) and pressure (P) sensor, a LOGO controller and extended module, pumps with different functions, an alarm output device and a loudspeaker. The control mode of the agricultural marsh gas control box includes the steps that the agricultural marsh gas control box collects two analog inputs, namely the temperature and the pressure, outputs include the three-pump control output, the heat device control output and the alarm output, the agricultural marsh gas control box is further provided with a manual button, an automatic button and an emergency stop button, a preset control mode is adopted to the agricultural marsh gas control box to control the heating device to enable the marsh gas fermentation temperature to be constantly kept about 35 DEG C, the pumps are started to add water into a reactive ...

Hydraulic drive type high rigidity micro-displacement apparatus

The invention discloses a hydraulic drive micro displacement device with high rigidity, which is used for ultra-precise processing and measuring, can improve the distinguishability of micro feeding of machine tools and implement ultra-thin cutting, high-precision size processing and online error compensation of ultra-precise machine tools, and has the following structure: a cylinder body with the outer diameter of D, the wall thickness of t and the working length of L is fixed inside a pedestal and fed with high-pressure oil, and the micro deformation of a cylinder body part with a thin wall is used for providing required micro displacement. A precise pressure meter is used for precisely controlling the oil pressure inside the cylinder body, thus obtaining precise micro displacement. The hydraulic micro displacement device has good input-output linearity and high rigidity, can bear bidirectional load, has large stroke and high distinguishability, and can easily satisfy the micro displacement ...

Tubular workpiece internal processing fixture and use method thereof

The invention relates to a tubular workpiece internal processing fixture and a use method thereof. The tubular workpiece internal processing fixture comprises an inner tube, an outer sleeve, a fixed lantern ring, elastic gaskets, a movable lantern ring, a locking lantern ring, compression strips, a rolling post and a spring pin. In a use process, the movable lantern ring is rotated, a toothed wheel of the movable lantern ring drives the outer sleeve to rotate, the outer sleeve extrudes the rolling post in the rotating process, the rolling post then extrudes the compression strips, and finally, the compression strips contract inwards, so that compression on a to-be-processed tubular workpiece is realized. Compared with an elastic fixture in the prior art, the tubular workpiece internal processing fixture provided by the invention has the advantages that the area, in contact with the to-be-processed tubular workpiece, of the fixture is large, the periphery of the tubular workpiece is simultaneously ...

Automatic testing mobile terminal and its implementation method

The invention discloses a mobile terminal testing method, which comprises the steps as follows: a. test instructions are inputted to the mobile terminal to be tested; b. the mobile terminal to be tested analyzes and executes the test instructions; c. test results are sent back after test. Since the contents to be tested are compiled to form the test instructions and then inputted to the mobile terminal to be analyzed and executed by the mobile terminal, the mobile terminal testing method has high testing efficiency. The invention also provides a mobile terminal.

Infectious disease waste liquid treatment device

The utility model discloses an infectious disease waste liquid treatment device which comprises a waste liquid treatment box, an ozone disinfector, a disinfection assembly and a control type closed liquid inlet, the ozone disinfector is arranged on the waste liquid treatment box, the control type closed liquid inlet is arranged on the waste liquid treatment box, and the waste liquid treatment box comprises a disinfection outer shell and a disinfection inner shell. The disinfection assembly is arranged in the disinfection inner shell, a disinfection cavity is formed between the disinfection outer shell and the disinfection inner shell, disinfection liquid is arranged in the disinfection cavity, and the control type closed liquid inlet comprises a liquid inlet pipe, a controller, a spring and a trigger. The utility model belongs to the field of infectious disease equipment, and particularly relates to a device which can automatically control a liquid inlet pipe to spray and disinfect a disinfectant ...

一种具有补偿能力的HSK刀柄

A HSK shank with compensation ability for fixing cutting tool to machine-tool features that a dirt-removing ring slot is made on its flange surface and several special flushing hole channels communicated with original high-pressure cooling liquid channel are made in the shank. Its advantages are high cleaning and abrasion compensating effect, and high load-bearing power.

Control method of gas-steam generator computer control system experimental apparatus

The invention relates to a control method of an experimental apparatus, in particular to a control method of a gas-steam generator computer control system experimental apparatus. The gas-steam generator computer control system experimental apparatus is a gas-steam generator control function test platform. According to a gas-steam generator computer control experimental test system constructed on the basis of the industrial touch screen technology and the PLC (programmable logic controller) technology, the PLC technology and the industrial touch screen technology are combined on the basis of the existing computer technical structure to form the integrated computer control system experimental apparatus which employs an industrial touch screen for man-machine interaction; an automatic control system is an important part of a gas-steam generator and used for coordinated control of other systems and data collection mainly through a PLC.

Portable powder spraying tooth cleaner

The invention provides a portable powder spraying tooth cleaner. The portable powder spraying tooth cleaner comprises a shell, a power system, a compressive air distribution system and a spraying system, wherein a spraying head is arranged at the upper part of the shell, and the middle part and the lower part of the shell encircle to form a main chamber, a compression cylinder and a control cylinder; the spraying system comprises a nozzle locking system and a nozzle; the upper end of the spraying head is connected with the nozzle through the nozzle locking system; a tooth powder barrel which is used for storing tooth powder is arranged on the nozzle; the power system which supplies power is arranged in the main chamber; the compressive air distribution system is arranged in the compression cylinder and the control cylinder; formed high-pressure air is sprayed out through the nozzle and the spraying system, and the tooth powder in the tooth powder barrel is sprayed out along with the high-pressure ...

Skip protrusion distortion correction device

The utility model discloses a skip protrusion distortion correction device, the hydraulic cylinder sealing device comprises an oil cylinder, install the bolt respectively, two on the telescopic link of hydro -cylinder and the hydro -cylinder base the bolt is fixed with the base and the telescopic link of hydro -cylinder through U type jaw respectively, every be connected with a round pin axle between two forks of U type jaw respectively, the bolt fastening is epaxial at the round pin to the bolt is perpendicular with the round pin axle. The utility model discloses when the protrusion of restoreing the skip warp, adopt the pulling force at the both ends of hydro -cylinder for the salient deformation of skip can be restoreed, has saved manpower and materials and repair time, has improved work efficiency, improves the life of skip.

Pre-equilibrium method of high-speed rotator with complicated structure

The invention relates to a pre-equilibrium method of a high-speed rotator with a complicated structure, which eliminates the original disequilibrium by adding a pre-equilibrium hole on a specific surface of the high-speed rotator with the complicated structure. The size of the pre-equilibrium hole is determined by three-dimensional modeling of the high-speed rotator with the complicated structure and adopting a golden-section approximation method. The pre-equilibrium method is simple and effective, can greatly improve the precision and efficiency of the dynamic equilibrium of the high-speed rotator with the complicated structure and can obtain a finished product with an attractive appearance. The high-speed rotator with the complicated structure can meet the requirement on dynamic equilibrium precision G2.5 without a dynamic equilibrium process in occasions with stable production process and low requirements on dynamic equilibrium.

Combined vibrating and tapping method

The invention discloses a method for composite vibration tapping, which comprises the steps of controlling the feeding of a stepping motor by a single chip control system; driving a tap by the stepping motor to move; introducing the ISP technology into the single chip control system and realizing the on-line downloading of a control program through an ISP serial interface circuit, and inputting the frequency, the forward step number, the stop step number and the backward step number of the stepping motor; and controlling the movement of the stepping motor through a vibration mode of ''go-stop-back-stop-go-stop'' sent by the single chip control system, and then entering a next cutting cycle. The invention has the advantages of low cost and easy control, thereby effectively protecting the tap cutting edge, improving the tapping efficiency, and realizing the controlling and the processing abilities of unexpected factors in the tapping process.

Multipurpose vertical device for testing comprehensive properties of HSK tool system

The invention discloses a multipurpose vertical device for testing the comprehensive properties of an HSK tool system and relates to the technical field of machining tool testing. The device comprises a base (1), a vertical box body (2), a spindle mechanism, an HSK knife handle seat (24), a knife handle clamping structure, a knife handle assembling and disassembling mechanism, a clamping force adjustment mechanism, a clamping force measurement device and a spindle locking device. In the invention, the requirement for testing and researching different types of HSK knife handles can be met through changing different types of HSK knife handle seats, and the clamping, the assembly and the disassembly of the HSK knife handle can be realized through the knife handle structure and the knife handle assembling and disassembling mechanism so as to test and measure various properties of the HSK tool system; the adjustment and the real-time measurement of the original clamping force of the knife handles ...

HSK hilt with high balance quality

The invention relates to an HSK hilt with high balance quality, which is used for connecting a machine tool and a cutter, and is particularly suitable for a high speed and precision machine tool. The invention adds two pre-balanced holes at a special surface and a special position on the premise of having no influence on the utilization property and appearance beauty of the HSK hilt, eliminates larger amount of unbalance caused by an asymmetrical structure design of the HSK hilt, and solves the problems that large dynamic balance workload, low efficiency, unguaranteed precision and inaesthetic appearance and the like in the manufacturing of the HSK hilt. The HSK hilt with the high balance quality of the invention can meet the requirement of balance quality of G 2.5 without carrying out the dynamic balance and meets the requirement of practical production. The invention can reduce the manufacturing cost of the HSK hilt, effectively reduces the vibration of a precision bearing of a main shaft ...

Constant-pressure control device and method for hydraulic pump

The invention discloses a constant-pressure control device and method for a hydraulic pump. An oil inlet of a fine filter is communicated with an oil discharge port of the hydraulic pump, an oil outlet of the fine filter is communicated with a constant-pressure control valve port P and a rodless cavity of a small variable piston at the same time, a constant-pressure control valve port A is communicated with a shock reducing valve port P, a constant-pressure control valve port T is communicated with a shock reducing valve port T and an oil tank at the same time, a constant-pressure control valve control port is communicated with the constant-pressure control valve port P through internal fixing damping, and a shock reducing valve port A is communicated with a rodless cavity of a large variable piston; a feedback rod is fixedly connected with the small variable piston, so that when pressure at the oil discharge port of the hydraulic pump is higher than pressure set by a proportional spring ...

Angle adjusting assembly for water absorption scraper and movable cleaning equipment

The invention provides an angle adjusting assembly for a water absorption scraper. The angle adjusting assembly comprises a supporting base, a connecting piece and a connecting piece, the connecting arm is used for fixing a water absorption scraper, and the connecting arm is hinged to the supporting seat at a first connecting position; and the driving part is arranged at the second connecting part and is used for adjusting the pivoting angle of the connecting arm relative to the supporting seat, and the adjusted connecting arm can be kept at the pivoting angle. In addition, the invention further provides mobile cleaning equipment. According to the angle adjusting assembly for the water absorption scraper, the driving part can be directly adopted to adjust the pivoting angle of the connecting arm relative to the supporting base, it is not needed to replace gaskets with different thicknesses tediously in the prior art, operation is convenient, and time and labor are saved.

Method for on-line fault diagnosis of vibration threading and its equipment

The present invention relates to a vibration threading on-line fault diagnosis method and its equipment, including vibration threading machine unit, drive and control unit of stepper motor and torquemeasuring unit, a torque sensor and a threading torque analysis and storage system are series-connected between its main sahft input end and threading grip holder, and said torque sensor is fixedly connected with main shaft of threading machine by means of elastic holding mechanism formed from elastic holder base cover, locking cover and locking screw. Said invention adopts the stepper motor as vibration source and threaidng force source, utilzies torque sensor to receive moving force and vibration source signal transferred by main shaft of machine tool of machine unit, and unilizes the signal amplification.

Binary fluid matching and mixing device

The invention provides a binary fluid matching and mixing device. The binary fluid matching and mixing device comprises a valve body, a temperature adjusting device, a mixing device, a pressure adjusting device and a flow adjusting device, wherein the valve body comprises an upper cavity and a lower cavity; the temperature adjusting device is mounted in the upper cavity; the mixing device is positioned inside the lower cavity of the valve body; the pressure adjusting device is mounted between two ends of the mixing device and the lower cavity; the flow adjusting device is used for controlling the gas flow on one side, so as to control the volume ratio of binary gas. The binary fluid matching and mixing device can realize temperature compensation and mixing of fluid, and the ratio and flow are continuously adjusted. The structure is compact, a plurality of flow meters and proportional valves or flow controllers are canceled, the quantity of components is reduced, the structure of a fluid ...

Device for testing integral performance of universal high speed processing tool system

Realize horizontal lathe turnning and milling combined machining's device

The utility model provides a realize horizontal lathe turnning and milling combined machining's device, including the horizontal lathe body, at the left and right sides of this horizontal lathe's lathe bed the same stand of symmetrical fixedly connected with structure respectively, be left stand and right stand respectively, flush in this left side stand and right stand top and erect the beam guideway, erect left right translation's cutter head slide at the beam guideway, put on the shelf at the cutter head slide and be equipped with the cutter head, accomplish corresponding processing task through changing different cutters on the cutter head. The utility model discloses generally, at horizontal lathe lathe bed left and right sides difference symmetrical fixedly connected with left side stand and right stand, erect the beam guideway above the stand, connect the cutter head slide on the beam guideway, erect the cutter head through the cutter head connecting plate on the cutter head slide ...

Straw dry fermentation and automatic return stirring methane tank

The invention discloses a straw dry fermentation and automatic return stirring methane tank, comprising two straw methane tanks and tunnel methane tanks arranged aside the two straw methane tanks. The openings of the straw methane tanks are provided with sealing films, and water channels are arranged around the openings. Automatic reflux stirring devices made of inlet pipe and return pipe communicated with the tunnel methane tanks are arranged in the straw methane tanks, and the tunnel methane tanks and the straw methane tanks are communicated with a supercharger through pipelines with valves. Because the automatic reflux stirring devices are communicated with the tunnel methane tanks and arranged in the straw methane tanks, when the sewage gas is produced in the tunnel methane tanks, the pressure in the tanks is increased, and the liquid sewage gas enters the straw methane tanks and are arranged above the straw material in the straw methane tanks from the liquid inlet pipes of the straw ...

Plastic cone gear

The invention provides a plastic cone gear which can increase the fatigue resistance strength of a dedendum and basically does not affect the impact resistance performance of the dedendum; the plastic cone gear is characterized in that a meshing pendant group circular conical surface is worked out by taking rbd as a radius, a first occurrence surface is tangent to the meshing side base conical surface, and a line segment AD is a tangent line of the first occurrence surface and the meshing side base conical surface. When the first occurrence surface purely rolls without slipping along the meshing side base conical surface, the locus of a point A is a meshing side tooth profile curved surface of the plastic cone gear. A non-meshing side base conical surface is worked out by taking rbc as a radius, a second occurrence surface is tangent to a non-meshing side base conical surface, and a line segment BC is a tangent line of the second occurrence surface and the non-meshing side base conical ...

Clamp and forklift with clamp

The invention discloses a clamp. The clamp comprises a handle, a connecting sleeve, hinged shafts, a left clamping plate, a right clamping plate, a left connecting rod, a right connecting rod, movable clamping jaws and a thread sleeve. A groove, a conical protrusion and a thread shaft are sequentially arranged at one end of the handle; the connecting sleeve is clamped in the groove; an opening is formed in one end of the thread sleeve; a thread structure is arranged in the opening; the other end of the thread sleeve is closed; supporting plates are arranged on the two axial sides of the thread sleeve; supporting plates are arranged on the two axial sides of the connecting sleeve; the left clamping plate is hinged to the right clamping plate through the corresponding hinged shaft; the left connecting rod is hinged to the right connecting rod through the corresponding hinged shaft; the supporting plates of the connecting sleeve are hinged through the corresponding hinged shaft; the supporting ...

Pre-equilibrium method of high-speed rotator with complicated structure

The invention relates to a pre-equilibrium method of a high-speed rotator with a complicated structure, which eliminates the original disequilibrium by adding a pre-equilibrium hole on a specific surface of the high-speed rotator with the complicated structure. The size of the pre-equilibrium hole is determined by three-dimensional modeling of the high-speed rotator with the complicated structureand adopting a golden-section approximation method. The pre-equilibrium method is simple and effective, can greatly improve the precision and efficiency of the dynamic equilibrium of the high-speed rotator with the complicated structure and can obtain a finished product with an attractive appearance. The high-speed rotator with the complicated structure can meet the requirement on dynamic equilibrium precision G2.5 without a dynamic equilibrium process in occasions with stable production process and low requirements on dynamic equilibrium.

Universal precision displacement measurement auxiliary device

Multipurpose solar agricultural insect-killing and bird-expelling instrument

The invention relates to an agricultural insect-killing and bird-expelling instrument, in particular to a multipurpose solar agricultural insect-killing and bird-expelling instrument which comprises a solar power supply portion, a battery, a single chip microcomputer, a voice portion and a power source control portion. The instrument is integrally designed to be in the shape of an eagle, solar cell panels are covered on wings and a dorsal ridge of the eagle, a controller and a bird-expelling power amplification equipment are disposed in the stomach of the eagle, LED lamps are disposed below the stomach and the wings of the eagle, a bird-expelling windmill is designed at the tail, the solar power supply portion is formed by connecting the solar panels with an energy-storage battery, the single chip microcomputer is connected with a power supply and an acousto-optic control portion which is grounded, and the power source control portion is connected with the battery. The multipurpose solar ...

Intelligent stray current testing instrument

The invention discloses an intelligent stray current testing instrument and relates to a testing instrument. According to the intelligent stray current testing instrument, detection signals are provided by an alternating current and direct current potential sensor, field data are continuously acquired by a single-chip microcomputer system through an A/D channel, the data are stored after being calculated and processed and are passed back to an upper computer regularly, and then pipeline corrosion conditions are predicted after the data are calculated and processed. The testing instrument can acquire alternating current and direct current pipe-to-soil potential change data for several consecutive days and can be buried underground completely to prevent theft. Field tests show that the instrument is stable in operation, measurement accuracy meets technological requirements totally, data communication performance is reliable, operation is easy and quick, the intelligent zero point and measuring ...

Multifunctional machine tool fixture

The invention relates to the technical field of machine tool fixtures, in particular to a machine tool fixture for clamping and positioning multiple workpieces with various materials and external physical characteristics. The multifunctional machine tool fixture comprises an upper sliding guide rail, a lower sliding guide rail, a clamping mechanism, a fastening bolt, an exchangeable pressing head, an internal thread pin, a first pin and a second pin. The multifunctional machine tool fixture is characterized in that the clamping mechanism is connected with the upper sliding guide rail through the fastening bolt, the internal thread pin and the first pin, and is connected with the exchangeable pressing head through the second pin; the upper sliding guide rail is connected with the lower sliding guide rail; and an opening groove is formed in one end of the lower sliding guide rail. The exchangeable pressing head comprises a finished planar exchangeable pressing head, a cylindrical surface ...

春尺蠖核型多角体病毒杀虫剂工厂化生产工艺

A nuclear polyhedron virus insecticide for spring looper can be industrially prepared from the pupa of spring looper through putting them in sandy soil, cold storing, eclosion to become adult, pairing, mating, ovipositing, sterilizing, incubacting, artificial culture for 3-4 years, attaching the nuclear polyhedron virus to the surface of feed, culturing with said feed, pulverizing, filtering, centrifugal depositing, and mixing the deposit with glycerin. Its advantages are high effect and high safety.

Composite excitation device used for vibration-cutting

A combined vibration exciter for vibration cutting is composed of casing, frequency varying unit, motor, shaft coupling, drive shaft, bevel gear set, vertical shaft, crank-slide block unit, dual-eccentric unit, vibration isolating unit, spring, central shaft, flat key and flange shaft. It can transform a rotation movement to an adjustable vibration consisting of a torsional vibration and an axialvibration.

Machine tool fixture prepared through powder metallurgy and preparing method of machine tool fixture

The invention provides a machine tool fixture prepared through powder metallurgy. The machine tool fixture is characterized by comprising, by weight, 91-95 parts of iron powder, 1.2-3.6 parts of copper powder, 1.0-2.5 parts of aluminum powder, 0.4-1.8 parts of nickel powder, 0.4-1.5 parts of tin powder, 0.3-2.0 parts of graphite powder, 0.2-0.6 part of free-cutting agent and 0.2-0.8 part of micro wax powder, the raw materials are mixed, 0.1-0.8 part of FC4430 is added into the mixture, and the machine tool fixture is prepared according to the powder metallurgy technology. The machine fixture has the advantages that compared with an existing clamp manufacturing technology, the preparing technology is simple, cost is low, material consumption is low, the preparing technology is especially suitable for clamps with complex shapes and structures, and the application range is wide.

Can realize numerical control teaching lathe of multitasking and system thereof

The utility model provides a can realize numerical control teaching lathe of multitasking and system thereof, including lathe bed, spindle motor, V band pulley, headstock, hold -in range, synchronous pulley, rotary main shaft, encoder, stand, beam guideway, synchronous pulley, cutter head connecting plate, cutter head, flat stone mill connecting plate, numerical control display screen, cable, hand wheel and handle components, support, bistrique body, bistrique emery wheel, hydraulic pressure tailstock, servo motor A, cutter head sideslip board, bistrique sideslip board, servo motor B, hydraulic pressure clamping device, X -Y cross sliding table and the peripheral milling headstock, solved the teaching generally and gone up exist not enough, can carry out the comparison to different machining modes and principle, just can carry out the compound operation of multiple processing, reduced investment and area, and can accomplish certain scientific research task.