34results about How to "Reduce oil intake" patented technology

The invention relates to the field of air conditioner control, in particular to a device and method for improving running reliability of a compressor. The device comprises a controller, the compressor, a four-way valve, an outdoor air cooling heat exchanger, a first outdoor unit stop valve, a second outdoor unit stop valve, a first heat exchanger and a detection device. The detection device acquires the discharge superheat degree; the controller adjusts the opening degree of a flow adjusting valve connected with the first heat exchanger according to the discharge superheat degree, and therefore the flow of gaseous refrigerant entering the first heat exchanger is controlled, the superheat degree of return air is improved, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet requirements. According to the device and method, the liquid / gaseous refrigerant flowing to the compressor can be heated, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet the requirements, so that the stable discharge superheat degree of an air conditioner can be kept at any environment temperature; therefore, the long-time running stability and reliability of the air conditioner are enhanced.

The present invention belongs to a six-stroke oil-saving internal combustion engine, relating to high-pressure oil pump, oil injection nozzle, cooling circulating pipeline, piston and piston cylinder. It is claracterized by that on the cylinder cp an oil injection nozzle and a water injection nozzle are set, one side of engine is equipped with a high-pressure water pump, oil inlet pipe of oil injection nozzle is connected with outlet of high-pressure oil pump, and water inlet pipe of water injection nozzle is connected with outlet of high-pressure water pump, and water inlet pipe of high-pressure water pump is connected with outlet of water tank.

The invention relates to a variable frequency hydraulic control system of a fuel dispenser, which comprises a motor, a frequency converter, a displacement pump, an oil-gas separator, a flow measuring converter, a coder, a control main board with a counter, an indicating device, a voltage control device, a solenoid valve, a sight feed oiler, an oil gun and a manual input device which are interconnected, wherein the solenoid valve is in a single valve structure. The invention also discloses a quantitative refueling control method of the variable frequency hydraulic control system of the fuel dispenser, which sets the initial frequency of the motor as 15-35 hertz. The variable frequency hydraulic control system of the invention adopts the solenoid valve with a single valve structure, greatlysimplifies the internal structure of the solenoid valve, reduces the cost of the solenoid valve and decreases the voltage drop of the solenoid valve. By the control method, the quantitative refuelingaccuracy of the fuel dispenser achieves the national standard and can realize higher accuracy.

The invention discloses a quick-unloading valve, in particular to a large-caliber liquid filling quick-unloading valve from a large tonnage oil cylinder on a plastic or rubber plastic foam forming machine, for shoe soles, foaming rubber floor, heat insulation sheets, suitcase lining, diving suit material and life jacket material, which comprises a valve body; wherein, a valve cap is arranged on an upper end of the valve body and a center bore and a pressure relief hole are disposed on the valve cap. A valve core is positioned in the valve body and a valve rod is arranged on the upper end of the valve core; a lower end of a valve rod is connected with the valve core and the upper end passes through the center hole of the valve cap and then extends out on the valve cap. An oil outlet is disposed on a side wall in the central section of the valve body, an oil inlet and a high pressure oil inlet are positioned on the side wall of a lower part of the valve body and the diameter of the oil inlet is shorter than the diameters of the oil outlet and the high pressure oil inlet. The quick-unloading valve is characterized in that a spring is sleeved on an extending section of the valve rod, a locknut is arranged on an outer end of the valve rod and an upper end and a lower end of the spring are propped against the locknut and the valve cap respectively. By adopting the large-caliber liquid filling quick-unloading valve for the oil cylinder of the foaming machine, the energy can be saved and the production cost can be reduced.

The invention discloses an automobile shock absorber. The automobile shock absorber comprises a buffer connected with an automobile adapter, wherein the buffer comprises a buffer housing; the buffer housing is provided with a piston cavity; a buffering piston shaft is mounted in the piston cavity in a sliding manner; a damping cylinder is arranged in the piston cavity; a reset spring is arranged in the damping cylinder; a lubricating oil inlet channel is formed in the buffer housing; an oil storage tank is formed in one side located on the lubricating oil inlet channel, of the buffer housing; a plurality of through holes are formed in the damping cylinder; the through holes communicate with the piston cavity and the oil storage tank; a lubricating oil discharging channel is formed in one side, away from the lubricating oil inlet channel, of the buffer housing; and damping channels which are respectively formed in two sides of the piston and communicate with the buffering piston shaft are arranged on the piston of the buffering piston shaft. According to the shock absorber disclosed by the invention, through unique structural design, multiple beneficial effects are archived, so that the shock absorber has good application prospects and latent industrial productive capacity in the automobile manufacturing field and the shock absorber field.

The invention discloses a bearing lubricating device. The bearing lubricating device comprises a transmission shaft, a bearing, a bearing cap and a cover plate. The transmission shaft is installed in the bearing and the bearing cap. An oil baffle disc is arranged between the bearing cap and the transmission shaft. A seal ring is arranged between the bearing cap and the oil baffle disc. The bearing cap is installed in the cover plate, and the bearing cooperates with the cover plate to fix the oil baffle disc. A seal pad is arranged at the position where the cover plate is matched with the bearing cap. A lubricating device body is arranged at the position where the bearing is matched with the cover plate. According to the scheme, the bearing is lubricated through the lubricating device, lubricating oil is added from a lubricating pipe, the lubricating oil enters the bearing and the part where the bearing is matched with the cover plate along the lubricating pipe, so that the lubricating effect is achieved, the sealing effect is improved, and the sealing effect on the bearing is guaranteed.

The invention relates to an intelligentize multifunctional plant protection robot four-wheel antiskid mechanism comprising a microcontroller, back and forth wheel speedtransmitters, solenoid valves and an oil cylinder; the microcontroller is the main controller; the speedtransmitter is the main detection input device; the solenoid valves are controlled objects; the hydraulic cylinder is the main execution mechanism; the back and forth wheel speedtransmitter is used for detecting wheel states; the microcontroller can compare rotating speed of each wheel so as to determine whether the wheel is in idle running or not; if yes, the microcontroller can reduce a solenoid valve opening of the corresponding wheel or cut off the solenoid valve, thus reducing fuel quantity, reducing hydraulic cylinder output , and preventing skid phenomenon.

An electronic rushless motor vehicle supercharger is disclosed. The electronic rushless motor vehicle supercharger is mainly characterized in that: the two ends of a gas inlet pedestal is provided with a filter screen and a gas inlet pipe, and is connected to an engine room through the gas inlet pipe; the inside of the gas inlet pedestal is provided with a motor pedestal; the motor pedestal is provided with a brushless motor with a gas inlet fan; the brushless motor is electrically connected to a circuit board, a fuse, a storage battery and a switch; the switch is disposed on an accelerator pedal; when a driver treads on the accelerator pedal, the switch can be directly actuated; the speed of rotating the gas inlet fan by the brushless motor is controlled by the depth treading on the accelerator pedal in a stepless manner, the higher the oil intake amount, the higher the gas inlet amount, the smaller the oil intake amount, the smaller the gas inlet amount, thus increasing the working efficiency of the engine; and when stopping on a red light or at idle, the brushless motor stops rotating the gas inlet fan immediately as the accelerator pedal is let off, thus avoiding generation of noise.

The automobile power regulator includes one first gas pipeline connected between the air intake boosting pipe of the engine and the boosting pipe of the high pressure oil pump, and features the first gas pipeline with boosting gas pressure controlling solenoid valve communicated with the pipeline. The present invention can regulate the output power of the engine based on practical requirement, increase the output power of engine, save fuel, reduce waste gas exhaust and reduce air pollution, has reasonable structure and compact arrangement, and is especially suitable for automobile with diesel engine adopting turbocharger.

The invention discloses a car shock absorber assembly which comprises a buffer connected with a car through connection disc. The buffer comprises a buffer shell provided with a piston cavity, a buffer piston shaft is installed in the piston cavity in a sliding manner, a damping barrel is arranged in the piston cavity, a reset spring is arranged in the damping barrel, and a lubricating oil inlet channel is formed in the buffer shell; an oil storage groove is formed in the side, provided with the lubricating oil inlet channel, of the buffer shell, a plurality of through holes are formed in the damping barrel, the piston cavity and the oil storage groove are communicated through the through holes, and an lubricating oil outlet channel is formed in the side, far away from the lubricating oil inlet channel of the buffer shell; and a damping channel for communicating the two sides of a piston of the buffer piston shaft is formed in the piston of the buffer piston shaft. According to the shock absorber assembly, through the unique structural design, many beneficial effects are obtained, and the good application prospect and industrial production potential are achieved in the field of car manufacturing and the field of shock absorbers.

The invention discloses an energy-saving safe explosion-proof reboiler which comprises a reboiler shell, a feeding pipe is fixedly connected to the bottom wall of the reboiler shell in a penetrating mode, a discharging pipe, a balance pipe, an oil inlet pipe and an air outlet pipe are fixedly connected to the top wall of the reboiler shell in a penetrating mode, and a heat exchange pipe is arranged in the reboiler shell. The end, away from the reboiler shell, of the balance pipe is fixedly connected with a gas storage chamber in a penetrating mode, the side wall of the gas storage chamber is welded to the side wall of the oil inlet pipe, the end, away from the reboiler shell, of the gas outlet pipe extends into the gas storage chamber in a penetrating mode, a gas pressure sensing device isarranged in the balance pipe, and a regulation and control device is arranged in the gas storage chamber. The reboiler has the advantages that internal small-amplitude overpressure can be allowed, self-regulation and control can be carried out when the pressure is too large, the reboiler cannot be directly closed, production is not affected, the reboiler is directly closed when the pressure is too large, the explosion risk is avoided, meanwhile, heat can be recycled, and more energy is saved.

The invention relates to a heat dissipation control valve and a heat dissipation system, the heat dissipation control valve comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a main oil inlet channel, a first working channel, a second working channel and an oil return channel, and the valve rod is movably arranged in the valve cavity to control the main oil inlet channel to communicate with the first working channel or the second working channel through the valve cavity. When the main oil inlet channel communicates with the first working channel, the heat dissipation control valve can drive the hydraulic motor to drive the fan to rotate clockwise, and when the main oil inlet channel communicates with the second working channel, the heat dissipation control valve can drive the hydraulic motor to drive the fan to rotate anticlockwise. The valve body is further provided with an overflow channel capable of being communicated with the main oil inlet channel and the oil return channel, the heat dissipation control valve further comprises an overflow valve, and the overflow valve is arranged on the overflow channel to control on-off of the overflow channel. According to the heat dissipation control valve and the heat dissipation system, the problem that a large amount of dust is accumulated on blades of the fan and even other parts of the heat dissipation system due to long-time working of the fan is solved.

The automobile power regulator includes one first gas pipeline connected between the air intake boosting pipe of the engine and the boosting pipe of the high pressure oil pump, and features the first gas pipeline with boosting gas pressure controlling solenoid valve communicated with the pipeline. The present invention can regulate the output power of the engine based on practical requirement, increase the output power of engine, save fuel, reduce waste gas exhaust and reduce air pollution, has reasonable structure and compact arrangement, and is especially suitable for automobile with diesel engine adopting turbocharger.

The invention discloses a continuously variable transmission, a vehicle and a brake control method.The continuously variable transmission comprises a driving transmission surface and a driven transmission surface, the driving transmission surface comprises a first driving transmission area and a second driving transmission area, and the surface roughness of the first driving transmission area is different from that of the second driving transmission area; the driven transmission face comprises a first driven transmission area and a second driven transmission area, and the surface roughness of the first driven transmission area is different from that of the second driven transmission area. When the vehicle is in a downhill working condition, along with downhill of the vehicle, the driven wheel reversely drives the driving wheel, so that the gap between the driving wheel movable disc and the driving wheel fixed disc at the driving wheel is smaller than the width of the transmission belt, the transmission belt is extruded to be located in the first driving transmission area, and large friction force exists between the driving wheel and the transmission belt; rotation of the driven wheel is limited, operation of the gear box connected with the driven wheel is limited, the gear box is connected with the wheel through a ball cage and the like, and therefore the downhill braking function is achieved.

The invention relates to an energy-saving type hydraulic pressure-shear testing machine. The energy-saving type hydraulic pressure-shear testing machine comprises a vertical load mechanism and a horizontal load mechanism, the horizontal load mechanism comprises a shear plate and a horizontal force load cylinder outputting a horizontalforceto the shear plate, the vertical loading mechanism comprises a lower press plate matched with the shear plate in use and a vertical force load cylinder outputting a vertical force to the lower press plate, the pressure and shear testing machine with dual hydraulic power further comprises an oil supply system supplying oil for the horizontal force load cylinder and the vertical force load cylinder, the oil supply system comprises an oil tank, a horizontalforce load cylinder oil supply channel and a vertical force load cylinder oil supply channel, and the horizontal force load cylinder oil supply channel and the vertical force load cylinder oil supplychannel are provided with overflow valves, and both comprise hydraulic pumps and flow regulating valves arranged on the upper stream of the hydraulic pumps.The invention provides the energy-saving type hydraulic pressure-shear testing machine capable of lowering oil energy loss.

The invention discloses a current limiter, a compressor and an air conditioner. The current limiter comprises a seat body and a sliding current limiting assembly. An oil inlet channel is formed in the center of an inner cavity of the seat body and penetrates through the seat body in the axial direction. The lower end of a crankshaft of the compressor is connected with the top of the seat body, and a central oil channel of the crankshaft communicates with the oil inlet channel. The sliding current limiting assembly comprises two sliding current limiting pieces, the two sliding current limiting pieces are oppositely arranged in the inner cavity of the seat body, and the two sliding current limiting pieces overlap each other. Elastic elements are arranged between the two sliding current limiting pieces and the inner cavity wall of the seat body, and transition holes are formed in the two sliding current limiting pieces. According to the current limiter, oil supply control of the compressor at high frequency and low frequency can be achieved at the same time, and the adaptability is good.

The invention relates to an intelligentize multifunctional plant protection robot four-wheel antiskid mechanism comprising a microcontroller, back and forth wheel speedtransmitters, solenoid valves and an oil cylinder; the microcontroller is the main controller; the speedtransmitter is the main detection input device; the solenoid valves are controlled objects; the hydraulic cylinder is the main execution mechanism; the back and forth wheel speedtransmitter is used for detecting wheel states; the microcontroller can compare rotating speed of each wheel so as to determine whether the wheel is in idle running or not; if yes, the microcontroller can reduce a solenoid valve opening of the corresponding wheel or cut off the solenoid valve, thus reducing fuel quantity, reducing hydraulic cylinder output , and preventing skid phenomenon.

A buffering protection type oil gas suspension system comprises a suspension oil cylinder and energy accumulators (1) on two sides. One of the energy accumulators (1) on the two sides is communicated with a rodless cavity of the suspension oil cylinder, the other energy accumulator is communicated with a rod cavity of the suspension oil cylinder, a throttle orifice (8) is parallelly connected with a buffering oil channel (12), a selector valve is arranged on the buffering oil channel (12), and the buffering oil channel (12) is cut off when a compression stroke of the suspension oil cylinder reaches a preset compression stroke. In addition, the invention provides a vehicle comprising the buffering protection type oil gas suspension system. The buffering oil channel among the rod cavity of the suspension oil cylinder and the accumulators is cut off when the compression stroke of the suspension oil cylinder reaches the preset compression stroke, accordingly, hydraulic oil in the accumulators only can flow into the rod cavity of the suspension oil cylinder via the throttle orifice, oil inlet quantity of the rod cavity is reduced remarkably, a compression damping effect is quickly strengthened, and an effective buffering protection effect is realized.

The invention provides a compound type pressurizing oil cylinder. The compound type pressurizing oil cylinder comprises a piston rod assembly, the piston rod assembly comprises an inner rod and an external piston rod arranged on the inner rod in a sleeving mode, medium-pressure oil enters a medium-pressure oil port and enters a medium-pressure oil cavity through a medium-pressure oil way passageway formed by the axis of the inner rod, and then the external piston rod is pushed to advance by a first preset stroke. After the first preset stroke is completed, high-pressure oil enters a high-pressure oil cavity through a high-pressure oil port, directly acts on a piston and pushes the piston to advance, and therefore the external piston rod continues to advance by a second preset stroke; and meanwhile, the medium-pressure oil cavity keeps continuous input of medium-pressure oil, and the die assembly pressure is medium pressure plus high pressure. After die assembly is completed, the process is switched to oil return, medium pressure and high pressure are cut off, back-pressure oil is provided for a back-pressure oil port, and therefore resetting, namely descending resetting of the oilcylinder, of the first preset stroke and the second preset stroke is achieved. The compound pressurizing oil cylinder has the effects of reducing energy consumption, improving the stability of the oilcylinder, reducing the pressure of the oil cylinder in a high-pressure state and the like.

The invention discloses a sealing wear-resisting bearing which comprises a bearing box, a transmission shaft, a bearing, a bearing cover and a sealing cover. The transmission shaft is arranged in the bearing box, one end of the transmission shaft is fixed to the bearing, and the other end of the transmission shaft is arranged in the sealing cover. The sealing cover is fixedly arranged at one end of the bearing box. The bearing is used for fixing the transmission shaft and arranged in the bearing cover. A sealing ring is arranged at the matched position of the bearing cover and the bearing. An oil guide groove is formed between the bearing cover and the bearing. A wear-resisting ring is arranged between the transmission shaft and the bearing. According to the scheme, the sealing ring is arranged at the matched position of the bearing cover and the bearing, the oil guide groove is formed between the bearing cover and the bearing, the transmission shaft is fixed by the bearing and the bearing cover, so that the oil inlet amount of the transmission shaft is reduced, oil pressure is lowered, the sealing effect is improved, and the sealing effect of the bearing is guaranteed; and through design of the wear-resisting ring, friction between the transmission shaft and the bearing slows down, and the service life is prolonged.

The invention discloses a sealing bearing which comprise a bearing box, a transmission shaft, a bearing body, a bearing cover and a sealing cover. The transmission shaft is installed in the bearing box. One end of the transmission shaft is fixed to the bearing body, and the other end of the transmission shaft is installed in the sealing cover. The sealing cover is fixedly installed at one end of the bearing box. The bearing body is used for fixing the transmission shaft and is installed in the bearing cover. A sealing ring is arranged at the matched part of the bearing cover and the bearing body. An oil guide groove is formed between the bearing cover and the bearing body. According to the scheme, the transmission shaft is installed in the bearing box, one end of the transmission shaft is fixed to the bearing body, the other end of the transmission shaft is installed in the sealing cover, and therefore overall sealing of the bearing box is well achieved; and the sealing cover is fixedly installed at one end of the bearing box, the bearing body is used for fixing the transmission shaft and is installed in the bearing cover, the sealing ring is arranged at the matched part of the bearing cover and the bearing body, the oil guide groove is formed between the bearing cover and the bearing body, the transmission shaft is fixed through the bearing and the bearing cover, so that the oil inlet amount of the transmission shaft is reduced, the oil pressure is reduced, the sealing effect is improved, and the sealing effect of the bearing is ensured.

The invention relates to the field of air conditioning control, in particular to a device and method for improving the operating reliability of a compressor. Including controller, compressor, four-way valve, outdoor air-cooled heat exchanger, first outdoor unit cut-off valve, second outdoor unit stop valve, first heat exchanger and detection device, the detection device obtains the exhaust superheat and controls The controller adjusts the opening degree of the flow regulating valve connected to the first heat exchanger according to the degree of superheat of the exhaust gas, thereby controlling the flow rate of the gaseous refrigerant entering the first heat exchanger, increasing the degree of superheat of the return air, and making the flow rate of the gaseous refrigerant discharged from the compressor Exhaust superheat meets requirements. The device and method of the present invention can heat the liquid / gas low-temperature refrigerant flowing to the compressor, so that the superheat degree of the gaseous refrigerant discharged from the compressor can meet the requirements, so that the air conditioner can maintain a stable discharge regardless of the ambient temperature. Air superheat, thereby enhancing the stability and reliability of the long-term operation of the air conditioner.

The invention relates to a hydraulic system control method for a compressed garbage truck, comprising the following steps: a hydraulic oil tank supplies oil to a slide cylinder and / or a scraper cylinder, and drives a piston rod of the slide cylinder and / or scraper cylinder to move; a position sensor Detect the moving position of the piston rod of the slide cylinder and / or the scraper cylinder; in the first stage, when the piston rod of the slide cylinder and / or the scraper cylinder moves from the initial position to the X1 position, the slide cylinder and / or the scraper cylinder The oil supply volume of the board cylinder is the first preset value; in the second stage, when the piston rod of the slide cylinder and / or scraper cylinder moves from the X1 position to the X2 position, the oil supply of the slide cylinder and / or scraper cylinder The amount of oil supplied is the second preset value; in the third stage, when the piston rod of the slide cylinder and / or scraper cylinder moves from the X2 position to the end position, the oil supply to the slide cylinder and / or scraper cylinder is the first Three preset values. The invention can realize the operation performance that can take into account both high-efficiency operation and low noise.

The invention discloses a novel electric vehicle damper which comprises a damper shell. The damper shell is provided with a piston cavity, a damping piston shaft is installed in the piston cavity in a sliding manner, a damping barrel is arranged in the piston cavity, a reset spring is arranged in the damping barrel, a lubricating oil inlet channel is formed in the damper shell, and an oil storage groove is formed in the side, located on the lubricating oil inlet channel, of the damper shell; the damping barrel is located between the oil storage groove and the piston cavity and is provided with a plurality of through holes, and a lubricating oil outlet channel is formed in the side, far away from the lubricating oil inlet channel, of the damper shell; a piston of the damping piston shaft is provided with a damping channel for communicating the two sides of the piston of the damping piston shaft; and the novel electric vehicle damper further comprises a damping mat. According to the novel electric vehicle damper, through the unique structural design and unique selection of the damping mat, many beneficial effects are achieved, and the good application prospect and industrial production potential are achieved in the field of electric vehicles and dampers.

The invention discloses a novel car shock absorber assembly which comprises a buffer connected with a car through connection disc. The buffer comprises a buffer shell provided with a piston cavity, a buffer piston shaft is installed in the piston cavity in a sliding manner, a damping barrel is arranged in the piston cavity, a reset spring is arranged in the damping barrel, and a lubricating oil inlet channel is formed in the buffer shell; an oil storage groove is formed in the side, provided with the lubricating oil inlet channel, of the buffer shell, a plurality of through holes are formed in the damping barrel, the piston cavity and the oil storage groove are communicated through the through holes, and an lubricating oil outlet channel is formed in the side, far away from the lubricating oil inlet channel of the buffer shell; and a damping channel for communicating the two sides of a piston of the buffer piston shaft is formed in the piston of the buffer piston shaft. According to the shock absorber assembly, through the unique structural design and the further improvement of a dustproof cover, many beneficial effects are obtained, and the good application prospect and industrial production potential are achieved in the field of car manufacturing and the field of shock absorbers.

The invention discloses a novel car shock absorber which comprises a buffer connected with a car through connection disc. The buffer comprises a buffer shell provided with a piston cavity, a buffer piston shaft is installed in the piston cavity in a sliding manner, a damping barrel is arranged in the piston cavity, a reset spring is arranged in the damping barrel, and a lubricating oil inlet channel is formed in the buffer shell; an oil storage groove is formed in the side, provided with the lubricating oil inlet channel, of the buffer shell, a plurality of through holes are formed in the damping barrel, the piston cavity and the oil storage groove are communicated through the through holes, and an lubricating oil outlet channel is formed in the side, far away from the lubricating oil inlet channel of the buffer shell; and a damping channel for communicating the two sides of a piston of the buffer piston shaft is formed in the piston of the buffer piston shaft. According to the shock absorber assembly, through the unique structural design and the further improvement of a dustproof cover, many beneficial effects are obtained, and the good application prospect and industrial production potential are achieved in the field of car manufacturing and the field of shock absorbers.

The invention relates to a telescopic supporting leg comprising a supporting leg box, a supporting leg, a first-stage supporting leg box telescopic oil cylinder, a first-stage supporting leg telescopic oil cylinder and a supporting leg box roller structure, wherein the supporting leg is embedded in the supporting leg box. The telescopic supporting leg is characterized in that the first-stage supporting leg box telescopic oil cylinder is arranged outside the supporting leg box, wherein one end of the first-stage supporting leg box telescopic oil cylinder is connected with a supporting leg box side plate support and the other end thereof is connected with a support arranged on an oil tank structure; the first-stage supporting leg telescopic oil cylinder is arranged inside the supporting leg, wherein one end of the first-stage supporting leg telescopic oil cylinder is connected with a support arranged on the supporting leg box and the other end thereof is connected with a support arranged on the supporting leg; and the supporting leg box roller structure comprises two lower supporting leg box roller structures, an upper supporting leg box roller structure and a side supporting leg box roller structure, wherein the two lower supporting leg box roller structures are arranged on the oil tank structure, the upper supporting leg box roller structure is arranged at the upper part of the supporting leg box, and the side supporting leg box roller structure is arranged on a supporting leg box side plate relative to the opposite side of the supporting leg box telescopic oil cylinder. Through the invention, the structure of the telescopic leg is simple, and abrasion among hydraulic pipelines and faults of the telescopic supporting leg are reduced; the telescopic action of the supporting leg is rapid so that the working efficiency is increased; and the supporting leg telescopic oil cylinder is low in price, and the telescopic supporting leg is convenient to mount and repair.

The invention discloses a three-cavity profiling suction muffler and a compressor, which solves the problems of the existing muffler, such as poor muffler effect on middle and low frequency noise, insufficient muffler capacity, easy resonance, large leakage, etc., and has the advantages of Enhance the noise reduction effect on middle and low frequency noise, increase the noise reduction volume, and avoid vibration; the technical solution is: including a first casing and a second casing, and the first casing is inserted above the second casing; the second casing The upper surface of a casing has a first curved surface adapted to the cylinder seat, and the first curved surface is offset and inclined to be provided with an air outlet connection section for matching the cylinder head; the first casing and the second casing The side surfaces of the body respectively have second curved surfaces adapted to the motor; the inside of the first housing and the second housing are divided into a resonance cavity and a first expansion cavity and a second expansion cavity connected in series, wherein the first The second expansion cavity inside the second housing is connected in series with the resonance cavity.