496 results about "Friction loss" patented technology

The invention relates to the technical field of speed reducers, in particular to a multi-stage coaxial speed reducer which comprises an outer cylinder, a first-stage gear ring and a second / third-stage gear ring are arranged in the outer cylinder, and a first-stage speed reducer, a second-stage speed reducer and a third-stage speed reducer are sequentially arranged in the outer cylinder. The first-stage planet carrier framework is axially fixed, and the second-stage planet carrier framework and the third-stage planet carrier framework axially float; gaskets / thrust bearings are arranged between stages to achieve axial supporting and friction reduction, and the last-stage three-stage planet gears adopt staggered-tooth gears to eliminate meshing clearances. Through the coaxial compact integrated design, the large reduction ratio and the compact structure are both considered; due to the lubricating circulation design of inter-stage antifriction supporting and self-adaptive rotating speed, the friction loss is greatly reduced, and the transmission efficiency is improved; the structure of staggered tooth clearance eliminating, elastic buffering and shaft system stabilizing effectively reduces gear abrasion and impact loads, remarkably prolongs the service life, has the advantages of being high in transmission precision, fast in response and stable in operation, and can be used for precise transmission, automobile active stabilizer bars and other scenes.

The invention relates to the technical field of part stamping dies, in particular to an automobile part machining stamping forming die which comprises a mounting plate, a fixed supporting structure is arranged below the mounting plate, a first mounting block is fixedly mounted on the upper side of the mounting plate, and a detachable lower die base is arranged on the upper side of the first mounting block. In the process that a sliding block moves downwards along with a movable adaptive block, the top face of the sliding block retracts into a first sliding cavity, space is reserved for stamping, when stamping is completed and an upper die block ascends, a second spring pushes the movable adaptive block to move upwards, the top of the sliding block protrudes out of the surface of a lower die base to eject a workpiece, and the top of the sliding block makes contact with an extrusion sensor to trigger an automatic oil injection pump; lubricating oil is injected into the oil injection hole through the guide pipe and sprayed to the surface of the lower die base through the oil injection groove to complete lubrication of the lower surface, the bidirectional lubrication mechanism ensures that the metal sheet is comprehensively lubricated in the stamping process, friction loss is remarkably reduced, and the product surface quality is improved.

The invention relates to a water pump scheduling method for estimating lift based on data driving, which comprises the following steps: calling structural information and sensing data, calculating friction loss and structural symmetry, extracting differential pressure data flow gradient, judging load matching degree, activating path nodes, identifying differential pressure data change sections, and mapping a calculation path. According to the method, dynamic correction and compensation of input parameters are achieved by means of conjoint analysis of the structural features of the water inlet and the water outlet and flow pressure difference data, and comprehensive judgment of the working condition matching degree and the periodic change state is combined, so that the flow resistance trend is judged, and the calculation result is corrected. The adaptability to cold load fluctuation and loop temperature difference change is enhanced, the response capability of lift calculation to water body characteristic change is improved by introducing flow resistance trend and viscous state factors, and the calculation stability of the model in different operation sections and the calculation accuracy of the model in complex working conditions are optimized by using a path activation configuration and output switching mechanism.

The invention discloses a drilling fluid flow calculation method for gas lift reverse circulation drilling. The drilling fluid flow calculation method comprises the following steps: S1, defining a gas lift reverse circulation lifting force and friction loss pressure model; s2, assuming that the drilling fluid flow in the circulation process is Qm; s3, calculating the total friction pressure of gas lift reverse circulation; s4, calculating the gas lift reverse circulation lifting force; and S5, according to the gas-lift reverse circulation lifting force and the gas-lift reverse circulation total friction force, the upward backflow amount of the drilling fluid is calculated. According to the invention, by inputting the gas lift reverse circulation well depth structure and the drilling related parameters, the influence of the gas lift reverse circulation well depth structure and the drilling related parameters on the backflow amount of the drilling fluid is researched, so that the optimal operation parameters of the optimal gas lift reverse circulation are obtained. According to the method, parameters of the air compressor air supply amount, the double-wall drill rod tripping-in depth, the double-wall drill rod specification and the single-wall drill rod specification selected for drilling of the gas lift reverse circulation geothermal well drilling can be optimized, and a reasonable theoretical basis is provided for more reasonably achieving gas lift reverse circulation drilling.

The application discloses a permanent magnet motor, which comprises a stator and a rotor, the rotor is arranged at the inner circumferential side of the stator, the rotor comprises a rotor house and a plurality of magnetic pole modules, the plurality of magnetic pole modules are arranged at the outer circumferential side of the rotor house along the circumferential direction of the rotor house, and the gap between adjacent magnetic pole modules extends outwardly and obliquely from the outer wall of the rotor house in the direction away from the rotation direction of the rotor house. In the application, the air in the driving gap flows outward during the rotation of the permanent magnet motor, the air in the air gap between the driving stator and the rotor flows, the permanent magnet motor is cooled, the air flow resistance and the wind friction loss are reduced, the heat dissipation of the permanent magnet motor is enhanced, in addition, the resistance during the rotation of the rotor is reduced, the mechanical loss of the rotor is reduced, and the efficiency of the permanent magnet motor is improved.

The invention relates to the technical field of hybrid power vehicles, in particular to a clutch assembly for a hybrid power system, the hybrid power system, a control method and device of the hybrid power system, a vehicle and a storage medium. The clutch assembly includes: a power input shaft; the power input shaft is sleeved with the one-way clutch, the driving gear and the thrust transmission assembly. The one-way clutch comprises an inner ring assembly. The driving gear comprises a connecting shaft, and the outer side wall of the connecting shaft is used for being matched with the movable body of the inner ring assembly. The thrust transmission assembly is used for triggering the one-way clutch to rotate relative to the power input shaft so that the one-way clutch and the driving gear can be switched between the self-locking state and the separation state. The self-locking state means that the movable body abuts against the outer side wall of the connecting shaft; and the separation state means that a gap is formed between the movable body and the outer side wall of the connecting shaft. According to the clutch assembly disclosed by the invention, the required hydraulic pressure can be reduced, the switching efficiency of series-parallel connection modes is improved, the driving and riding comfort is improved, and the dragging and friction loss can be reduced.

The invention relates to the field of pharmaceutical engineering and automatic control, in particular to a reaction kettle for synthesizing a medical intermediate and an intelligent control method of the reaction kettle. The reaction kettle comprises a reaction kettle main body, a stirring assembly integrated with a dynamic torque sensor and a thermotechnical pipeline assembly, the system firstly executes no-load calibration to draw a mechanical friction loss curve and a heat transfer coefficient map; deducting friction reference inversion apparent viscosity by using real-time torque during operation, and judging a reaction stage in combination with a reaction heat rate; then dynamic heat balance control is executed, and a medium temperature change compensation strategy or a rotating speed shearing strategy is selected to be executed according to the heat transfer deviation; the method is characterized in that high-precision viscosity inversion is achieved by eliminating mechanical friction interference, the polymerization degree or the crystallization state is visually monitored on the premise that the closed environment is not damaged, and the problem that the reaction process is invisible in the prior art is solved.

The invention relates to a sealing device for sealing a rear-opening truck box body against a facade portal during loading and unloading with refrigerated goods. According to the invention, rope pulley guides are arranged at the deflection points of the elastic cords or bands instead of ring guides or pipe bends, wherein the rope pulleys can be located in a sleeve to ensure tracking accuracy. According to the invention, it is advantageous that the roller guidance of the elastic cords minimizes their friction losses, which also significantly accelerates the venting process and minimizes the wear of the elastic cords or tapes, thus improving the overall functionality of the sealing device.

The invention provides an oil return pipe mechanism and a compressor. The oil return pipe mechanism comprises an oil return pipe, a supporting column, a spring, an activation valve plate and a fixed valve plate, and the oil return pipe is communicated with an upper support oil pool, a lower support oil pool and a bottom oil pool. The activation valve plate can slide and is initially attached to the fixed valve plate under the elastic force of the spring; when the pressure of the oil pool rises to a set value, the oil pushes and activates the valve plate to overcome the resistance of the spring, a corresponding oil return channel is opened, and redundant oil is guided back to the oil pool at the bottom. The upper support oil return pipe is opened preferentially to maintain the pressure of the backpressure oil groove, and the lower support oil return pipe is opened to further relieve pressure when the rotating speed is increased, so that self-adaptive oil pressure adjustment under different working conditions is achieved, dynamic disc backpressure is stabilized, friction loss is reduced, and operation reliability is improved. The scroll compressor is reasonable in structural layout, low in machining precision requirement, high in oil return efficiency and suitable for scroll compressors with various rotating speed frequencies.

The utility model relates to the technical field of stretching devices, in particular to a multifunctional copper wire stretching device. According to the technical scheme, the device comprises a box body and further comprises a workbench arranged on the box body, a fixing block is arranged on the workbench, a clamping plate is installed in the fixing block, an electric push rod connected with the clamping plate is fixedly installed on the fixing block, and a treatment box is fixedly installed on one side of the top of the workbench. According to the utility model, the burrs attached to the surface of the stretched copper wire are automatically cleaned and removed, the friction loss and stress concentration points are reduced, the normal stretching operation is prevented from being influenced by the breakage of the copper wire, the working efficiency is improved, meanwhile, the operators are protected, and the safety is improved.

The utility model relates to the field of winding machines, and particularly discloses a coil winding device which comprises a workbench and a winding mechanism, the winding mechanism comprises a tubular wire outlet device and a driving assembly for driving the wire outlet device to rotate, a plurality of balls are arranged at the wire outlet end of the wire outlet device in a rolling mode, and the balls are distributed in the circumferential direction with the axis of the wire outlet device as the center. According to the utility model, the balls are arranged at the port of the wire outlet device, so that the contact area between the coil and the wire outlet can be reduced, the friction between the wire outlet device and the coil can be reduced, the friction loss of the coil in the winding process can be reduced, and meanwhile, the balls are exposed out of the pipe body, so that the wire outlet device is more attractive in appearance. And the phenomenon that the abrasion risk of the wire is increased due to shear stress between the wire and the edge right angle of the wire winding wall in the wire winding process can be prevented.

The application discloses a kind of magnetic suspension ORC units and control method, it is related to low-temperature waste heat power generation technical field;The unit includes magnetic suspension motor, turbine, evaporator, preheater, condenser, liquid storage tank, working medium pump and control system;Magnetic suspension motor is coaxial direct connection with turbine, and constitutes oil-free integrated closed structure;Control system includes PLC controller, four-quadrant frequency converter, turbine inlet regulating valve, hot gas bypass valve and sensor assembly;PLC controller inside preset turbine performance curve and working medium property model, configured to: real-time calculation turbine import and export pressure ratio, query performance curve to determine the best speed target value, through adjusting turbine inlet regulating valve control magnetic suspension motor speed track the target value.The application solves the problems of large mechanical friction loss, high maintenance cost and low variable condition efficiency of existing ORC unit, and realizes efficient and stable operation of the unit under wide operating conditions through collaborative control strategy.

The utility model relates to the technical field of models, in particular to a motorcycle model for power improvement, which comprises a rear wheel swing arm, a driving component is mounted on the inner side of the rear wheel swing arm, and a rear wheel is mounted on the driving component; the driving assembly comprises a model airplane motor, a steel sleeve is fixedly connected to the outer wall of the model airplane motor, a rear wheel is connected to the steel sleeve in a matched mode, a fixing disc is fixedly connected to one end of the model airplane motor through a locking nut, a threaded hole is formed in the side wall of the fixing disc, and a bolt in threaded connection with the threaded hole is inserted into a rear wheel swing arm. According to the motorcycle model for power improvement, the model airplane motor can be directly fixed to the rear wheel swing arm, due to the fact that the model airplane motor is used, power output is better, due to the fact that the model airplane motor directly drives the rear wheel to move through power, friction loss is avoided, the motorcycle model has the advantages of being free of maintenance, high in reliability and simple in structure, and compared with a traditional power output mode, the model airplane motor is more convenient to use. The model airplane motor is lower in position and lower in gravity center, so that the stability of the vehicle during operation can be improved.

The invention provides a thermal balance calculation method and device of a differential mechanism, the differential mechanism, a storage medium and an electronic device.The method comprises the steps that geometric parameters of a planetary gear and a half axle gear of the differential mechanism, the rotating speed of the half axle gear and the input torque are obtained; calculating contact pressure data between the planetary gear and the half axle gear according to the geometric parameters and the input torque; calculating a friction pair bearing characteristic number of the differential according to the contact pressure data; acquiring the friction coefficient in the differential according to the characteristic number of the friction pair bearing; calculating the total friction loss power of the differential according to the friction coefficient, the half axle gear rotating speed and the contact pressure data; and the cooling oil amount needed by the differential in unit time is calculated according to the friction loss total power and the lubricating oil parameters. According to the embodiment, a scheme for accurately calculating the cooling lubricating oil amount of the differential mechanism is achieved, a forced lubrication differential mechanism structure is provided, and the problems of reliability and efficiency caused by cooling lubrication of the differential mechanism in the related technology are solved.

The invention provides a hybrid power special gearbox, a control method and a vehicle. The hybrid power special gearbox comprises an engine, a P1 motor, a P3 motor, a synchronizer and a gearbox input shaft. The output end of the engine is rigidly connected with the input shaft of the gearbox; a rotor of the P1 motor is coaxially connected with an input shaft of the gearbox; the synchronizer is used for selectively transmitting power of the engine and the P1 motor to the output end. By optimizing and canceling the clutch and the control logic, the total mass of the power system is reduced, the friction loss energy of the clutch is eliminated, the manufacturing cost of the power system is reduced, and the scheme can effectively reduce the manufacturing cost and improve the transmission efficiency.

The utility model discloses an automobile seat slide rail, which belongs to the technical field of automobile seats and comprises two slide rail seats and a driving shell, the driving shell is positioned between the two slide rail seats, a motor is fixedly mounted on the side surface of the driving shell, a lead screw is rotatably mounted in the driving shell, and a guide rail is mounted in the lead screw. An output shaft of the motor is fixedly connected with one end of a lead screw, a moving seat is installed on the outer surface of the lead screw in a threaded mode, connecting plates are fixedly installed on the left side face and the right side face of the moving seat, and channels are formed in the left side face and the right side face of a driving shell; the two sliding rail seats are arranged to be matched with one driving shell for use, the motors and the lead screws on the driving shell are matched to achieve horizontal movement of the seat mounting plates on the two sides, the two seat mounting plates can move through one lead screw, and compared with the mode that two motors are matched with two lead screws to achieve movement of the two seat mounting plates, the two seat mounting plates can move more conveniently. The movement precision is effectively reduced, and the friction loss phenomenon occurring when the two motors are matched with the two lead screws can be effectively reduced.

The utility model belongs to the technical field of cranes, particularly relates to a mast crane with good durability, and provides the following scheme aiming at the durability problem: the mast crane comprises a track, the upper surface of the track is fixedly connected with a push block; a base is mounted on the outer surface of the track in a sliding manner; the upper surface of the base is fixedly connected with a mast crane body; an observation window is arranged on the outer surface of the base; a guide groove is formed in the lower surface of the base; mounting frames are fixedly connected to the outer surfaces of the two sides of the base; a cleaning brush is fixedly connected to the inner surface of the mounting frame; a liquid storage tank is arranged on the inner surface of the base; the upper surface of the base is fixedly connected with a guide shell. Through the arrangement of the liquid storage tank, the track is automatically lubricated, the friction loss is reduced, and the durability is improved; and through arrangement of a cleaning brush, dust on the surface of the rail can be cleaned through the cleaning brush, and meanwhile lubricating oil on the surface of the rail can be evenly smeared.

The utility model provides an adjustable induced draft fan impeller blade handle shaft anti-falling bush, which relates to the technical field of bushings, and comprises a hub, blades and a flange, and the outer end part of the hub is provided with a blade handle hole. The wear-resistant composite flange bushing with the flange structure is arranged between the flange and the hub, and the flange is mounted on the inner side of the blade handle hole, so that when a centrifugal force is generated during operation of the fan rotor, the flange directly blocks the flange bushing from moving outwards, the effect of the centrifugal force on the flange bushing is counteracted, the flange bushing is effectively prevented from falling off from the blade handle hole, and the service life of the fan rotor is prolonged. The problems of rotation jamming of the blade handle shaft, failure of a blade adjusting function, drifting of movable blades, aggravation of equipment operation vibration and the like caused by falling of the flange lining are avoided, safe and stable operation of a unit is guaranteed, meanwhile, the flange lining is made of a composite material, the composite material has self-lubricating performance and abrasion resistance, the lubricating effect of the blade handle shaft when the blade handle shaft rotates in the blade handle shaft hole is guaranteed, and the service life of the blade handle shaft is prolonged. Friction loss is reduced, and the service life of parts is prolonged.

The utility model discloses a diesel engine timing system transmission structure with an oil-resistant belt and a diesel engine. The diesel engine timing system transmission structure comprises a driving wheel. The driving wheel comprises a driving wheel and a driving gear coaxial with the driving wheel; the air compressor gear and the crankshaft gear are meshed with the driving gear, the idle gear is meshed with the crankshaft gear, and the fuel pump gear and the oil pump gear are meshed with the idle gear. The timing oil-resistant belt is used for realizing transmission of the driving wheel and the driven wheel; and the tensioner is used for tensioning the timing oil-resistant belt. The wet type timing oil-resistant belt is adopted to achieve transmission, and noise, friction loss, weight, transmission efficiency, oil consumption, emission and the like are obviously improved.

The invention discloses a machining milling machine with a gearbox, and belongs to the technical field of machining milling machines, the machining milling machine comprises a base, a movable workbench is arranged at the top of the base, a lifting machining table is fixedly connected to one side, located on the movable workbench, of the top of the base, and a spindle box body is arranged at the top of one side, close to the movable workbench, of the lifting machining table; according to the machining device, the first clamping base, the second clamping base, the first transmission gear, the second transmission gear, a rotating base, a pushing swing rod, a driving rotating disc and a rotating pin are arranged, rotation output by the driving motor is transmitted to the machining main shaft through meshing of the first transmission gear and the second transmission gear, and the machining main shaft is controlled to rotate; when the driving motor is conveniently adjusted to rotate at a constant rotating speed to control the machining main shaft to rotate, the rotating speed of the machining main shaft is increased or decreased so as to adapt to rotating speeds of different cutting requirements, and by adjusting the positions of the first transmission gear and the second transmission gear, rotating speed adjustment is achieved, and friction loss of gear transmission is reduced.

The application provides a piston, a compressor and a refrigeration device, the piston is used for the compressor, the compressor comprises a suction cavity, and the piston comprises: a body, the body comprises a first end and a second end arranged in an axial direction; a support groove is arranged at the first end of the body and / or the second end of the body, and the support groove is used for being in communication with the suction cavity. Compared with the piston without the support groove in the related art, the oil film thickness can be increased, the oil film carrying capacity is improved, the lubrication between the upper end surface and / or the lower end surface of the piston and the bearing or the partition plate is significantly improved, the wear of the piston is reduced, and the service life of the piston is prolonged. The local dynamic pressure is increased, the gas pressure cavity can support the crankshaft, and then the carrying capacity of the crankshaft can be improved, and the friction loss in the operation process of the compressor is reduced. The contact area between the piston and the upper bearing, the lower bearing or the partition plate is reduced, so that the input of the compressor can be improved, and the efficiency and reliability of the compressor are improved.

The present application belongs to the technical field of machine tool equipment, and in particular to a top pin structure of a vertical cradle five-axis turning and milling combined machine tool, comprising a machine tool, wherein the base of the machine tool is arranged in a U shape with the opening direction facing upwards. The structure, by arranging the top pin mechanism, significantly improves the accuracy and motion stability of the top pin pressure adjustment, the rolling contact design of the main and auxiliary balls greatly reduces the friction loss in the force transmission process, and the fine adjustment of the top pin pressure can be realized through the threaded transmission of the threaded rod, meeting the pressing needs of different material rods; the pre-compression structure of the spring provides stable pre-tightening force and realizes fast resetting of the top pin, avoiding jamming; the design of the guide sleeve and the hard alloy contact end limits the radial swing of the top pin, ensures the coaxiality of the top pin and the material rod, reduces the machining eccentricity error, and on the other hand, enhances the wear resistance of the top pin and prolongs the service life; the overall structure makes the top pin bear force evenly, effectively avoids the displacement of the material rod under pressure, and improves the workpiece size accuracy.

This invention provides a pump assembly, a compressor, and an air conditioner. The pump assembly includes a crankshaft, rollers, and a cylinder. The rollers are fitted onto the outer circumferential wall of the crankshaft and are connected by threads. The rollers can reciprocate linearly along the axial direction of the crankshaft under the action of crankshaft rotation. The rollers are located inside the cylinder and divide the internal space of the cylinder into independent first and second cavities. The first and second cavities are arranged along the axial direction of the crankshaft. According to this invention, the counterweight is eliminated, eliminating the need for a counterweight to balance the force. The crankshaft has no eccentric circle, resulting in more balanced force on the compressor, reducing compressor vibration, and avoiding the vibration and component wear problems caused by eccentric rotation in the prior art. At the same time, the sliding vane structure in the prior art is eliminated, reducing moving parts, thereby reducing friction loss and refrigerant leakage, and improving the energy efficiency and reliability of the compressor.

The invention discloses a gas pipeline welding device for gas engineering, which comprises a mounting base plate, a plurality of mounting holes are formed in the mounting base plate and used for mounting the mounting base plate on a machine tool, and pipeline interfaces are formed in the mounting base plate; the connecting base frame is mounted on the mounting base plate through a locking screw; the centering clamping mechanism is mounted on the connecting base frame; the input end of the rotating winding mechanism is provided with a driving motor, and the driving motor drives the rotating winding mechanism to rotate around the circle center of the pipeline port; and the circular seam welding head is mounted on the rotary winding mechanism, and the rotary winding mechanism drives the circular seam welding head to rotate. The pipelines are accurately aligned through the symmetrical clamping structures, the welding coaxiality is guaranteed, multi-stage gear transmission is matched with the sliding guide design, the welding track is stable and controllable, friction loss is reduced, the device is suitable for different pipe diameters, installation is flexible, manual errors are reduced through automatic surrounding welding, the efficiency and the welding seam quality are improved, and the service life of equipment is prolonged.

The utility model provides a dry gas sealing assembly and a vacuum pump, and relates to the technical field of sealing. Specifically, the dry gas seal assembly comprises a fixed seat, an elastic element, a rotating ring and a fixed ring. Wherein the fixing seat is provided with a containing cavity, and the elastic element, the rotating ring and the fixing ring are all located in the containing cavity. And the fixed ring is positioned between the rotating ring and the elastic element. The elastic element comprises a ring part and at least two elastic parts arranged on the ring part at intervals in the circumferential direction, and the fixed ring is used for being close to the rotating ring under the action of the elastic parts. On the basis, the fixed ring and the rotating ring always have a tendency of being attached together. On the basis, a plurality of spiral air guide grooves are formed in the side, close to the elastic part, of the rotating ring at intervals in the circumferential direction, and the spiral air guide grooves form an air film with certain rigidity by accurately controlling the path and pressure of airflow, so that effective sealing is achieved, fluid media are prevented from leaking, meanwhile, friction loss is reduced, and the service life is prolonged.

The invention relates to the technical field of compressors, in particular to a lead screw linear compressor which comprises a lead screw motor, a motor shell, a piston rod, a connecting barrel, a cooling fan, an air path pipe, an air cylinder body, a water jacket and a cylinder cover. The piston rod is directly connected with the lead screw motor, linear motion output by the lead screw motor is used for pushing the piston rod to move in a reciprocating mode to compress gas, and the piston head in the air cylinder body is used for constructing the first-stage compression chamber and the second-stage compression chamber. Gas paths are arranged in the cylinder cover and the base of the cylinder body around the first-stage compression chamber and the second-stage compression chamber and are communicated with a first-stage exhaust valve and a second-stage air inlet valve, so that second-stage gas compression under the bidirectional action of the piston rod is realized; on the basis that the mechanical structure of the piston compressor is simplified, the mechanical efficiency is improved, maintenance is convenient, meanwhile, the two-way piston rod can achieve two-stage gas compression in the one-time reciprocating process, friction loss is reduced, and stable and safe operation of the piston compressor can be guaranteed.

The utility model relates to the technical field of sealing valves, in particular to an abrasion-free spiral surface sealing valve. The utility model discloses an abrasion-free spiral surface sealing valve which comprises a valve body. According to the utility model, the valve plate is driven by the screw rod to enable the closed spiral sealing gasket to abut against the communicating part of the discharging cavity and the feeding cavity of the valve body, the connecting part is sealed by the closed spiral sealing gasket, and the closed spiral sealing gasket adopts a closed spiral design, so that a multi-layer sealing effect is formed between the valve plate and the connecting part; therefore, the sealing effect after the whole valve is closed is improved; after the handle is pulled forwards to drive the plug pin to be separated from the screw rod, the hand wheel is rotated to drive the valve plate to slide leftwards, and at the moment, the closed spiral sealing gasket can be separated from the communication position along with movement of the valve plate, so that friction loss generated between the closed spiral sealing gasket and the valve body in the moving process can be prevented; and therefore, the service life of the closed spiral sealing gasket is prolonged.

The invention relates to cooking fume treatment equipment, in particular to a cooking fume purification device which comprises a fume collecting pipeline, an impeller, a driving mechanism and a radial magnetic suspension bearing, and a fume exhaust channel communicated with the outside is formed in the fume collecting pipeline; the impeller is positioned in the smoke exhaust channel; the driving mechanism comprises a rotating shaft and a magnetic bearing motor, the rotating shaft is connected with the impeller, and the bearing motor is arranged in the smoke collecting pipeline and arranged on the peripheral side of the rotating shaft in a sleeving mode to drive the rotating shaft to rotate along the axis of the rotating shaft. The radial magnetic suspension bearing is arranged in the smoke collecting pipeline and arranged on the peripheral side of the rotating shaft in a sleeving mode, the radial magnetic suspension bearing can support the rotating shaft to be located at the axis position of the bearing motor through magnetic force, and compared with a traditional induction motor, the problem of noise generated by friction is avoided to a certain degree; and the friction loss is avoided, so that the efficiency of the motor is further improved.

The invention relates to the technical field of oil-free screw compressors, and discloses an integrated oil-free screw compressor which comprises a compressor body and a driving motor arranged on the side edge of the compressor body, a transmission shaft is arranged on the compressor body, and a lubricating shaft sleeve matched with the transmission shaft is arranged on the end face of the compressor body. The output end of the driving motor is fixedly provided with an output shaft, and the outer wall of the transmission shaft is fixedly sleeved with a transmission disc. Accurate power separation of the driving motor and the compressor body is achieved through the mechanical clutch structure, the compressor body can be directly shut down during no-load, idle friction loss of a rotor, a synchronous gear and other core components is avoided, the problem that no-load useless energy consumption of a traditional machine is high in proportion is solved, energy consumption of equipment during no-load operation is reduced, and the service life of the equipment is prolonged. Meanwhile, the driving motor keeps normal operation, part impact and loss caused by frequent starting and stopping of the motor are avoided, the service life of the motor and an electric control system is prolonged, and energy conservation and equipment operation stability are both considered.

A scroll compressor is provided. The scroll compressor can comprise a housing, a drive motor, a stationary scroll, a rotating scroll, a rotating shaft, and a plain bearing. An anti-tilt section can be formed on the inner circumferential surface of the plain bearing to prevent contact with the rotating shaft. Accordingly, the outer diameter of the rotating shaft is enlarged to match the outer diameter of the plain bearing, thus reducing the surface pressure between the rotating shaft and the stationary scroll while maintaining the compression length. Furthermore, tilting of the plain bearing along with the rotating shaft can be prevented, thereby reducing the frictional loss between the plain bearing and the stationary scroll.