853 results about "Thrust bearing" patented technology

The invention discloses an electromagnetically-supported hybrid magnetic thrust bearing structure and a suspension force design method, and provides a hybrid magnetic bearing structure design in which radial alternate magnetization is adopted in the axial direction, a permanent magnet bearing formed by stacking multiple layers of magnetic rings bears all axial thrust loads, and radial electromagnetic bearings are assisted at the two ends to maintain dynamic stability of a rotor. The performance requirements of high bearing capacity, low power consumption, good active control capability and high dynamic stability of the hybrid magnetic thrust bearing in a limited space are met; in order to solve the problems that an inner magnetic ring and an outer magnetic ring are not strictly centered due to the influence of machining precision, an assembly process, rotor eccentricity and the like during actual operation of a permanent magnet thrust bearing, additional unbalance load, dynamic unbalance load and the like are generated in the radial direction. The electromagnetic supporting suspension force design method comprehensively considers the radial unbalance load of the permanent magnet thrust bearing, the dynamic unbalance load of the rotor and the self-weight influence, effective calculation of the suspension force of the supporting rotor is achieved, and important technical support is provided for the hybrid magnetic thrust bearing structure and suspension force design iteration.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

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 embodiment of the utility model provides a storage tank bottom structure, a storage tank and a carrier rocket, the storage tank bottom structure comprises a shell and a top cover, the shell is of a hollow arc-shaped revolving body structure which is through in the front-back direction, the two ends of the shell are the small-diameter end and the large-diameter end respectively in the axis direction of the shell, and the small-diameter end of the shell is fixedly connected with the top cover; a propellant is arranged on the top cover; a plurality of protruding structures are evenly distributed on the outer side face of the shell in the circumferential direction in the axis direction of the shell. According to the technical scheme, the bottom structure of the thrust bearing type storage tank is simple in process, easy to manufacture in batches and beneficial to achieving light weight of a carrier rocket.

A method, system and electronic device for regulating the top cover pressure of a vertical hydro-generator set, and a storage medium. The method comprises: setting a monitoring time window, and collecting thrust bearing pad temperatures at different time points within the monitoring time window; acquiring a top cover pressure influence factor set at each time point; inputting the top cover pressure influence factor set corresponding to each time point into a pre-built top cover pressure influence correction database for optimal matching to obtain a bearing pad temperature correction factor corresponding to each time point; using the bearing pad temperature correction factor corresponding to the same time point to perform temperature influence correction on the corresponding thrust bearing pad temperature so as to obtain a corrected thrust bearing pad temperature; and on the basis of a preset pad temperature threshold, performing over-temperature calculation on the corrected thrust bearing pad temperature at each time point.

A turbocharger capable of improving local oil supply and negative pressure oil leakage capacity relates to the technical field of turbochargers and comprises a thrust bearing plate arranged between a shaft seal and a thrust sleeve. Thrust oil wedges are arranged on the opposite side walls of the thrust bearing plate, an oil supply channel is formed in the thrust bearing plate and comprises a first oil collection cavity and a second oil collection cavity which are sequentially and annularly arranged from outside to inside, and first oil collection cavity oil outlet holes communicated with the first oil collection cavity are formed in the opposite side walls of the thrust bearing plate correspondingly. And the second oil collecting cavity oil outlet hole is communicated with the second oil collecting cavity. The thrust bearing solves the problem that in the prior art, oil supply is relatively thin in the area with high bearing capacity on the thrust surface of the thrust bearing; and in order to avoid the reliability problem of dynamic and static interference, a gap between a dynamic piece and a static piece forming a labyrinth structure needs to be designed to be large enough, so that the negative pressure resistance oil leakage of the labyrinth structure is limited.

The invention provides a permanent magnet radial-axial collaborative balancing device and method for a shield pump, and belongs to the technical field of shield pumps. The device comprises a pump shell, an impeller, a rotor assembly, a stator assembly, a shaft, a thrust bearing, a rotor permanent magnet component and a static permanent magnet component, the rotor permanent magnet component and the static permanent magnet component correspond to each other, the rotor permanent magnet component is embedded below an impeller front cover plate opening ring, and the static permanent magnet component is embedded into the corresponding inner wall of the pump shell. The magnetization direction and the axis of the pump shaft form a preset inclination angle and are in mirror symmetry, so that a repulsive magnetic circuit with opposite same-name magnetic poles is formed; space magnetic force generated during working can be decomposed into radial and axial components. The radial component provides restoring force pointing to the center when the rotor deviates, and the radial stability is enhanced. The axial component counteracts the axial thrust of the fluid, and the thrust bearing load is reduced. External energy input is not needed, the structure is compact, vibration noise can be effectively restrained, and the service life of the bearing is prolonged.

The invention relates to a vibration control design method for a ship low-speed motor direct propulsion long shafting, and the method comprises the steps: determining the position of a low-speed motor output flange and the central position of a propeller, determining the positions of a thrust bearing, an intermediate bearing, a tail pipe bearing and the like, arranging the span of the bearings, arranging the number of the bearings, and calculating the shafting strength. Torsional vibration calculation of the long shaft system of the low-speed motor, torsional vibration calculation result analysis, centering calculation of the long shaft system of the low-speed motor, cyclotron vibration calculation of the long shaft system of the low-speed motor, longitudinal vibration calculation of the long shaft system of the low-speed motor, fatigue analysis of a thrust bearing, verification of whether the thrust bearing meets the load requirement or not, shaft system jacking verification, and the like. And finally verifying the shafting vibration control design effect through a navigation test. Different from conventional diesel engine propulsion and high-speed motor propulsion shafting design, the method starts from the characteristics of a low-speed motor direct propulsion shafting, and analysis is carried out through shafting strength design, torsional vibration, centering, rotation, longitudinal vibration, installation and other systems, so that the risks of shafting load imbalance and abnormal vibration are avoided.

The invention discloses a device for ultrasonic-assisted additive manufacturing of a metal workpiece, and relates to the field of laser additive manufacturing, the device comprises a circular base plate, a plurality of transducers, a synchronous stretching mechanism, a supporting box, a vibration isolation mechanism, a bearing air cylinder, a first driving motor and an ultrasonic generator, the supporting box is rotationally installed on the vibration isolation mechanism, the first driving motor is used for driving the supporting box and the circular base plate fixed to the supporting box to rotate, and the bearing air cylinder is installed on the equipment base and located on the inner side of the vibration isolation mechanism. The piston end of the bearing air cylinder penetrates through the supporting box and then is connected with the synchronous stretching mechanism through a thrust bearing, the energy converter is installed at the movable end of the synchronous stretching mechanism through a floating constant force connector, and the energy converter is connected with an ultrasonic generator through a high-frequency coaxial cable. The mechanical property of the annular rotary part during laser additive manufacturing can be improved by synchronously changing the position of the transducer.

The speed reducer gear shifting shaft structure comprises a gear shifting shaft, a gear shifting gear, a needle roller thrust bearing, a pre-tightening assembly, a sliding sleeve and a gear shifting fork, the gear shifting gear, the sliding sleeve and the pre-tightening assembly are arranged on the gear shifting shaft, the gear shifting gear is arranged on the gear shifting shaft through the needle roller thrust bearing, and the pre-tightening assembly is arranged on the gear shifting shaft through the sliding sleeve. The pre-tightening assemblies make contact with the gear shifting gears correspondingly, and thrust of the gear shifting gears is pre-tightened through the pre-tightening assemblies. Sliding friction of the end face of the gear shifting gear is converted into rolling friction through the needle roller thrust bearing, and end face abrasion is greatly reduced. And due to the constant pre-tightening force, early failure caused by too tight or too loose bearings is avoided, the reliability of the speed reducer is remarkably improved, and the service life of the speed reducer is remarkably prolonged.

The invention relates to the technical field of valves, in particular to an eccentric rotary valve which comprises a valve body, an upper valve rod, a lower valve rod rotationally arranged in the valve body and a valve element located in the valve body, the valve element is fixedly provided with an upper shaft diameter coaxially fixed to the upper valve rod and a lower shaft diameter coaxially fixed to the lower valve rod, and a valve seat and a limiting piece are arranged in the valve body; an upper stuffing box is arranged on the inner wall of the valve body, sealing stuffing is arranged on the inner wall of the valve body, an upper sliding bearing is jointly arranged on the peripheries, close to each other, of the upper shaft diameter of the upper valve rod and the upper shaft diameter of the valve element in a sleeving mode, and a stuffing pressing sleeve used for blocking a gap is fixedly arranged on the inner wall of an opening, facing the outside, of the upper stuffing box; the possibility that medium thrust borne by the valve element is conducted to the upper valve rod and the lower valve rod is effectively reduced, valve element position change caused by medium impact is greatly reduced, and the situation that the valve element deviates, and the valve rod additionally bears the medium thrust is avoided.

The invention provides a transmission and an all-terrain vehicle adopting the transmission. A driving bevel gear and a gear shaft of the transmission have good connection stability. The transmission includes a housing, an output shaft assembly, and a bearing pack. The housing includes a housing body and an end cap. A matching cavity is defined by the shell body and the end cover. The shell body is provided with a communication port for communicating the matching cavity and the containing cavity. The output shaft assembly comprises a gear shaft, a transmission gear and a driving bevel gear. The gear shaft penetrates through the communication opening of the shell body. The first end of the gear shaft is located in the containing cavity. And the transmission gear and the driving bevel gear sleeve the gear shaft. The bearing set comprises a first ball bearing, a second ball bearing and a thrust bearing. The first ball bearing is located at the first end, and the gear shaft abuts against the shell body in the second axial direction through the first ball bearing. The second ball bearing is located at the communication port. The thrust bearing is located at the second end, and the gear shaft abuts against the end cover in the first axial direction through the thrust bearing.

The invention discloses a horizontal force bearing device of an engine, and relates to the technical field of thrust bearing of engines. The movable frame is horizontally arranged on the fixed frame and comprises a first frame, a second frame and a plurality of second connecting rods, the first frame and the second frame are connected with the fixed frame, the first frame is provided with a plurality of connecting holes used for being connected with the thrust end of the engine, and the second frame is used for transmitting thrust to the force measuring sensor; the plurality of second connecting rods are respectively arranged between the first frame and the second frame; the measuring force bearing seat is arranged on the fixed frame, and the measuring force sensor is fixed by the measuring force bearing seat; the standard force bearing seat is arranged on the fixed frame, and the standard force bearing seat, the measuring force bearing seat, the first frame, the second frame and the engine thrust end are coaxially arranged; the pre-tightening force loading structure is connected with the first frame, and the pre-tightening force loading structure is used for loading a pre-tightening force to enable the second frame to abut against the measuring force sensor. The method has the advantage that the horizontal thrust of the high-thrust engine can be accurately measured.

The invention discloses thrust bearing dismounting equipment, relates to the technical field of dismounting tools, and provides thrust bearing dismounting equipment comprising a force application sleeve plate, a connecting body, a carrier plate, a central screw rod, a force application handle, a positioning clamp body and a connecting rod. The force application sleeve plate, the connecting body and the carrier plate are combined to form a frame body structure; the bottom of the connecting body is provided with a bottom protective cover for holding the detached thrust bearing; during use, the force application sleeve plate is sleeved on the shaft neck to apply extrusion force to the thrust bearing to be disassembled and is in contact with the thrust bearing surface; the positioning clamp body is clamped and fixed on a shaft or other bearing objects; the connecting rod is of a telescopic rod structure and enables the force application sleeve plate and the positioning clamp body to be connected and positioned together. The positioning clamp body can limit the movement of the force application sleeve plate, the connecting body and the carrier plate so as to reduce the slipping risk of the force application sleeve plate; the technical effects that the thrust bearing dismantling equipment is high in reliability, low in operation risk, small in damage to the thrust bearing in the dismantling process and high in dismantling efficiency are achieved.

The invention discloses a gas compressor test device and method, and belongs to the field of gas compressor tests.The gas compressor test device comprises a driver, and a driving shaft of the driver is used for being connected with a main shaft of a gas compressor; the unloading assembly comprises a balance drum, a high-pressure gas supply unit, an exhaust unit and an adjusting valve, the balance drum is used for being connected with a main shaft of the gas compressor and used for being connected with an impeller on the main shaft of the gas compressor, the high-pressure gas supply unit is used for being communicated between the balance drum and the impeller, and the exhaust unit is used for being communicated with the side, away from the impeller, of the balance drum; an inlet temperature sensor, an inlet pressure sensor and a flow sensor are arranged in the double-twisted-wire air inlet channel; an outlet temperature sensor and an outlet pressure sensor are arranged in the annular outlet throttler; and a controller. The technical effects of the invention lie in that the device not only facilitates the independent test of the related gas compressor, but also facilitates the small axial force of the impeller of the gas compressor borne by the thrust bearing.

The invention discloses a self-sensing intelligent thrust bearing based on a nano-generator and a state monitoring method of the self-sensing intelligent thrust bearing. The thrust bearing comprises a shaft ring, a seat ring, a rolling body, a retainer and a nano-generator sensing structure, wherein the rolling body and the retainer are arranged in an annular raceway between the shaft ring and the seat ring; obtaining a first voltage signal and a second voltage signal through a nano generator sensing structure; the state monitoring method comprises the following steps: acquiring a first voltage signal and a second voltage signal; respectively preprocessing the two paths of signals and then carrying out data-level fusion; dividing the fusion signal into a training set, a verification set and a test set, and training a data-level fusion 1D-CNN model; and inputting a to-be-tested signal into the trained model to realize intelligent classification of the bearing operation state. According to the invention, multi-source signal fusion sensing and real-time monitoring of the running state of the thrust bearing are realized, the structure is compact, the sensitivity is high, and the identification is accurate.

The utility model relates to the technical field of scroll compressors, in particular to a thrust bearing structure for a scroll compressor and the scroll compressor, the thrust bearing structure for the scroll compressor comprises a supporting body and a shell installed on the compressor, and a first through hole is formed in the middle of the supporting body; the thrust bearing is arranged on a driving shaft of the compressor in a sleeving mode, the thrust bearing comprises a bearing main body and an edge folding part, the edge folding part is formed at the top of the bearing main body, the bearing main body is installed in the first through hole, and the edge folding part is erected on the top face of the supporting body and used for bearing the driving shaft; and an oil groove is formed in the edge folding part. By means of the thrust bearing structure for the scroll compressor and the scroll compressor, the problem that an existing thrust bearing for the scroll compressor is complex in machining or prone to abrasion can be solved.

The utility model provides a roller sleeve bearing, which relates to the technical field of roller bearings and comprises a body, a connecting column arranged at the top of the body, a roller sleeve connected to the middle of the connecting column, a roller connected to the side wall of the roller sleeve, a pressure plate connected to the side wall, close to the top, of the roller sleeve, and a top cover connected to the top of the pressure plate. A thrust shaft is connected to the position, close to the top, of the inner wall of the roller sleeve, a rolling rod is connected to one side of the thrust shaft, a connecting disc is connected to one side of the rolling rod, an opening is formed in one side of the pressing disc, an embedding groove is formed in the top of the pressing disc, a pressure lead screw is connected to the middle of the embedding groove, and an embedding assembly is connected between the roller sleeve and the roller. Through the opening formed in the device, the pressure plate can be deformed and folded by applying pressure to the pressure plate, so that the thread of the pressure plate can apply pressure to the thread of the roller sleeve to a certain extent for clamping, and the threaded connection of the pressure plate is more stable.

The invention relates to the technical field of gas plectrum bearing test appliances, in particular to a technical platform of a gas plectrum bearing test rotor system. The device comprises a basic platform, a balance tire, a turbine shaft, a heat insulation cover, a shaft turbine end positioning accessory, a bearing sleeve set assembly, a shaft pressure end part assembly and an air cylinder. The balance tire is fixedly arranged on the basic platform, and an air inlet is formed below the balance tire; the turbine shaft is installed on the balance tire in an interference fit mode, and the turbine shaft is sequentially sleeved with the heat insulation cover, the shaft turbine end positioning accessory and the bearing sleeve set assembly. The bearing sleeve group is connected with the shaft pressure end part assembly through a pin; an air cylinder is assembled at the rear end of the bearing end part assembly; and a dynamic pressure gas thrust bearing for testing is arranged on the axial pressure end part assembly. According to the technical scheme, the problems of low maximum rotating speed, poor stability and the like of a gas foil bearing technical test platform in the prior art are solved.

The invention relates to the technical field of manufacturing of turbocharger bearings, in particular to a thrust bearing for a turbocharger, which comprises a ring body, a thrust ring, a thrust ring and a thrust ring, the multiple thrust tables are arranged on the axial end face of the ring body, and the multiple thrust tables are arranged in the circumferential direction of the shaft cavity; the oil film grooves are located between the adjacent thrust tables in the circumferential direction of the shaft cavity, and the oil film grooves are sunken in the thrust tables in the axial direction; the oil baffle wall is positioned between the oil film groove and the radial direction of the shaft cavity; the oil inlet groove is formed in the ring body and penetrates through the oil blocking wall, one end of the oil inlet groove is communicated with the oil film groove, and the other end of the oil inlet groove is communicated with the shaft cavity. The lubricating stability of the thrust end of the thrust bearing is improved, and the service life of the thrust bearing is prolonged.

The invention relates to the technical field of bearings, and provides a thrust bearing and turbomachinery. The thrust bearing comprises a fixing ring which is used for being arranged at an interval with the thrust disc in the axial direction; the multiple thrust pads are arranged in the circumferential direction of the thrust disc at intervals and located between the fixing ring and the thrust disc, gaps are formed between the thrust pads and the thrust disc, and the gaps are filled with continuous oil films; the multiple first level blocks are arranged at intervals in the circumferential direction of the fixing ring, and the contact surfaces of the first level blocks and the fixing ring are first spherical surfaces; the multiple second level blocks are arranged between every two adjacent first level blocks and one thrust pad, each second level block is provided with a plane structure facing the thrust pad and a double-spherical-surface structure facing the fixing ring, and each double-spherical-surface structure comprises two second spherical surfaces distributed at intervals; and the two second spherical surfaces are respectively in contact fit with the two adjacent first level blocks. Point contact matching between a spherical surface and a plane is adopted, so that swinging of the level block and the thrust pad is more flexible, and the self-balancing effect is better.

The conical surface speed reduction transmission device mainly comprises a power input conical shaft, a planet cone, a fixed cone, a transmission output piece, a pressing elastic body, a thrust bearing and the like. The power input cone shaft is used for transmitting power to the whole device, the planet cones are distributed on the periphery of the power input cone, are in linear contact with the power input cone shaft and have certain pressing force with the power input cone, and therefore friction transmission is achieved. The fixed cone is a circular ring piece with the cylindrical outer side and the conical inner side, the planet cone is in linear contact with the fixed cone, certain pressing force exists between the planet cone and the fixed cone, the planet cone is matched with the power input cone shaft to achieve autorotation of the planet cone, and meanwhile the planet cone revolves around the power input cone. One end of the planet cone is connected with a transmission output piece through a bearing to achieve power transmission. The pressing module provides pressing force among the power input cone shaft, the planet cone and the fixed cone. By means of the structure, the planet cones revolve around the power input cone shaft to achieve the speed reduction effect.

The utility model relates to canning processing large -scale spraying equipment technical field, and disclose a kind of canning processing large -scale spraying equipment, including paint spraying support pedestal, the surface of paint spraying support pedestal is fixedly connected with plane thrust bearing ring, the upper surface of plane thrust bearing ring is fixedly connected with can body positioning rotary disc, the can body positioning rotary disc adopts disc structure, the upper surface of paint spraying support pedestal is fixedly connected with arcuate frame, the outer surface of arcuate frame is provided with first tooth groove, the outer surface of arcuate frame is sleeved with square frame, the inner side surface of square frame is provided with first gear and support wheel, by adopting arcuate frame structure, can make paint spraying assembly around arcuate frame place mobile paint spraying, and bottom is provided with can body positioning rotary disc as the support platform of can body, and can body is set in can body positioning rotary disc place and rotates paint spraying, can be even and not waste paint spraying, can body and can bottom can be together paint spraying, paint spraying comprehensive efficiency is high.

This invention discloses a hydrodynamic gas thrust bearing with an integrated top and bottom foil, relating to the field of air bearing technology. It can significantly extend bearing life, improve load capacity, and slow down temperature rise. The technical solution of this invention includes several integrated foil sheets fixedly mounted on a thrust back plate. These integrated foil sheets are sequentially connected end-to-end to form a ring, with an overlapping area between adjacent integrated foil sheets. A corrugated foil sheet is provided in the overlapping area, fixedly connected to one of the integrated foil sheets and in contact with the other integrated foil sheet. This invention eliminates the traditional welding connection between the top foil sheet and the bearing back plate, thereby significantly extending the bearing's service life.

The invention relates to the technical field of hydraulic motors, in particular to a cycloid hydraulic motor integrating self-lubricating and cooling functions, which can establish an oil return channel inside to smoothly discharge leaked oil, can take away heat and scrap iron generated by friction of a thrust bearing, and can form oil film lubrication between the front end of a shaft and a shell to ensure normal operation of the motor. The motor comprises a motor body, the motor body is provided with a first oil port and a second oil port, the first oil port and the second oil port are communicated with an internal oil duct, an output shaft is arranged in the motor body, and a thrust bearing and a thrust gasket are arranged between the front end of the output shaft and a shell of the motor body. An oil return channel is arranged between the thrust bearing and a shell of the motor body, an oil return through hole communicated with the oil return channel and the in-shaft counter bore is formed in the output shaft, the oil return channel is communicated with the first oil port and provided with a first one-way valve, and the second oil port is communicated to the peripheral face of the front end of the output shaft through an inner flow channel. The oil return channel communicates with the inner flow channel and is provided with a second one-way valve.

A pump comprising a plurality of impellers stacked on top of each other via a pump shaft, a diffuser corresponding to each impeller, a body housing the impellers, the diffusers, and the pump shaft, and a protector thrust bearing at one end of the pump shaft.

The invention discloses a radial and thrust combined sliding bearing for a gear transmission device, and relates to the technical field of bearings. The problems that a common sliding bearing can only bear force in a single direction, radial and thrust bearings need to be arranged at the same time, and light weight and integration of a device are not facilitated are solved. The bearing comprises a bearing body, the bearing body is installed in a bearing box, the bearing body is made of carbon structural steel, a radial positioning piece and an axial positioning piece are arranged between the bearing body and the bearing box, lubricating oil flows to the bearing body through a first channel and flows to a thrust pad through a second channel, and under the action of a rotating gear shaft, the bearing body is driven to rotate. According to the bearing, dynamic pressure liquid friction is established, the effects of radial supporting and axial positioning are achieved, the thrust pads on the two sides of the bearing body can bear axial stress in two directions, radial and thrust bearings do not need to be arranged at the same time, the axial size can be effectively reduced under the condition that the axial space of a gearbox is limited, and integration is better.

Transmission system for a motor vehicle includes a differential drive device configured to distribute a torque to two wheel shafts of an axle, and which includes a coupling device having a coupled position in which the transmission of the torque via the differential drive device is provided and a decoupled position in which the transmission of the torque via the differential drive device is interrupted. The coupling device includes an actuator including a piston guided in axial translation between a retracted position and an extended position; and a thrust bearing which is inserted between the piston and a first coupling part of the coupling device so as to transmit an actuating force of the piston to the first coupling portion and to move the first coupling portion from the uncoupled position to the coupled position during the movement of the piston from the retracted position to the extended position.

The utility model discloses an unmanned aerial vehicle interference radar rotating assembly which comprises a base, a motor, a coupler, a thrust bearing, a rotating shaft, a swing rod, a support, an unmanned aerial vehicle interference radar body, a first hinge piece, a second hinge piece, a third hinge piece and an electric push rod. An output shaft of the motor is connected with the rotating shaft through a coupler; the top end of the rotating shaft is connected with the middle of a swing rod, and the front end of the swing rod is connected with an unmanned plane interference radar body through a support. The top end of the rotating shaft is rotationally connected with the middle of the swing rod through a third hinge piece, and the two ends of the electric push rod are hinged to the rotating shaft and the swing rod through a first hinge piece and a second hinge piece respectively. When the electric push rod stretches or retracts, the swing rod is driven to rotate in the vertical direction. The included angle between the unmanned aerial vehicle interference radar body and the vertical direction is changed. And the range of interference signal emission of the unmanned aerial vehicle interference radar body is expanded.

The invention relates to the technical field of oil and gas wellhead sealing equipment in the field of petroleum engineering, and discloses an oil and gas wellhead rotary sealing device suitable for workover treatment. The device consists of a bottom flange, a self-sealing middle body, a central pipe, a rotor upper body, a thrust bearing, a tapered roller bearing, a deep groove ball bearing, a lower rubber ring, an upper rubber ring, an upper rubber ring compression ring, a lower rubber ring compression ring, a gland and a positioning pin, is simple in structure, small in size and light in weight, adopts an integrated design, reduces redundant parts, is compact in overall structure, is convenient to mount and carry on site, and is convenient to maintain and maintain. The load burden of a wellhead is reduced; the sealing pressure is small, the sealing performance is good, reliable sealing can be achieved under the low pre-tightening pressure through the synergistic effect of mechanical pre-sealing and hydraulic sealing, and the sealing stability under the high-pressure working condition is effectively improved through the double-sealing mode; due to the design of the three-bearing structure and the detachable central pipe, the operation stability of the device under the complex working conditions of rotation, drilling and the like is guaranteed.