122 results about "Plain bearing" patented technology

A height adjustment device includes a lower part, an upper part, and a height adjustment unit including a first spherical plain bearing, a second spherical plain bearing, a third spherical plain bearing, a first lifter, a second lifter, and a third lifter. The height adjustment device is configured to adjust a height of the upper part with respect to the lower part by driving the first lifter, the second lifter, and the third lifter.

The invention provides a parallel hydraulic interconnection damping catamaran which comprises an upper cabin, a hydraulic interconnection suspension and a floating body which are sequentially arranged from top to bottom, and the whole structure is symmetrically distributed in the front view and is trapezoidal in the left view. The hydraulic interconnection suspension forms two side waists of a trapezoid, the upper cabin body is connected with the transverse rocker arm through the hydraulic cylinder set, the front transverse rocker arm is hinged to the longitudinal rocker arm through the radial spherical plain bearing, the longitudinal rocker arm is hinged to the floating body through the radial spherical plain bearing, and the rear transverse rocker arm is directly connected with the floating body. The front hydraulic cylinder set and the rear hydraulic cylinder set stretch out and draw back to achieve pitching motion, the left hydraulic cylinder set and the right hydraulic cylinder set stretch out and draw back alternately to drive the floating bodies on the two sides to move in a staggered mode, heeling of the ship body is achieved, and therefore three-freedom-degree vibration reduction compensation of heaving, pitching and heeling is jointly completed. Through the eight-cylinder interconnected hydraulic loop design and the special connection pair layout, wave multi-degree-of-freedom impact is effectively decoupled, the seakeeping and stability of the ship are remarkably improved, and the device is suitable for special rescue scenes such as shallow water areas and complex channels.

The invention discloses a multipurpose testing device and method suitable for medium and large-size centripetal spherical plain bearings. The device is mainly composed of a base, a test bearing device, an axial loading assembly and a radial loading assembly, wherein the test bearing device, the axial loading assembly and the radial loading assembly are installed on the base. Wherein the test bearing device integrates a test base, a transmission rotating shaft, a front-middle-rear three-section type supporting assembly, a to-be-tested bearing assembly, a torque sensor and a wear loss measuring assembly; the axial loading assembly and the radial loading assembly can operate independently and can also work cooperatively, and the combined load can be applied to the bearing accurately. The device has the basic advantages of being stable in structure and high in bearing capacity, can simulate complex combined load working conditions, achieves multi-parameter real-time monitoring, can be adapted to tests of medium and large radial spherical plain bearings of various specifications, and is of great significance in promoting research and development and performance verification of high-end spherical plain bearings.

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.

The invention relates to a sliding bearing used in rotating machines such as pumps and turbines, in particular to a sliding bearing used in an ultra-low temperature environment. A sliding bearing is provided with: a sliding contact pad (1) having a shaft support surface (1a) for supporting the outer peripheral surface of a rotating shaft (100); a housing (2) disposed on the outside in the radial direction of the sliding contact pad (1); and a pad pressing mechanism (3) that presses the sliding contact pad (1) against the pad support surface (2a) of the housing (2) when the sliding contact pad (1) is contracted.

The application discloses a vibrating yarn spreading mechanism and belongs to the field of yarn production equipment, which is used to solve the problem of how to improve the stability of yarn spreading effect. The vibrating yarn spreading mechanism comprises a rack, at least two parallel vibrating rollers, and a driving mechanism. Each of the two ends of the vibrating roller is provided with a group of sliding shafts and sliding bearing seats, the sliding bearing seats are fixedly arranged on the rack, and the sliding shafts are slidably connected with the sliding bearing seats of the same group. The driving mechanism comprises a motor, at least two output wheels and a hinged shaft. The motor is fixedly arranged on the rack and is in transmission connection with each output wheel. Each output wheel is provided with an eccentric shaft. The end of the first shaft section of the hinged shaft is provided with an axially extending threaded hole, the second shaft section is provided with an external thread and is connected with the threaded hole. The first shaft section is hinged with the eccentric shaft of the same group of output wheels, and the second shaft section is hinged with the sliding shaft of the same group of vibrating rollers. The eccentric shafts of the adjacent two output wheels are 180 degrees out of phase, so that the moving directions of the adjacent two vibrating rollers are opposite when the motor works.

The application belongs to the technical field of equipment evaluation, and discloses a kind of calculation method and system of sliding bearing dynamic characteristic coefficient, comprising: taking half of real oil film model as research object at axial symmetry plane, and setting the side surface of film and oil inlet located at axial symmetry as symmetry plane, which can significantly save computing resources and speed up the calculation speed;And the film and the oil inlet are separately divided into grids, and the outer wall surface of the film and the bottom surface of the oil inlet are set as grid interfaces, which can realize automatic grid division while ensuring grid quality;The application applies displacement, speed small disturbance to the journal in the equilibrium position by UDF in Fluent software, realizes the calculation of sliding bearing dynamic characteristic coefficient, and effectively improves the calculation accuracy.

The utility model provides a sliding bearing babbitt metal casting tool, which belongs to the technical field of sliding bearing production equipment and comprises a supporting mechanism. Comprising a supporting frame, a casting ladle rotationally installed on the inner side of the supporting frame, a top frame fixedly installed on the top of the supporting frame, a driven gear fixedly connected with the casting ladle, and a driving gear installed on the surface of the supporting frame through a connecting rod bearing and engaged with the driven gear. And the angle positioning mechanism comprises a positioning component playing a damping role in rotation of the driven gear and a damping component used for adjusting the pouring angle of the casting ladle. According to the utility model, the driven gear is damped through the positioning part, and the driven gear is prevented from rotating too fast or suddenly, so that the stability of the casting ladle during pouring and casting is improved; the pouring angle of the casting ladle is positioned and adjusted through the damping component, the problem that fixed-angle pouring of a traditional casting ladle is difficult to achieve is solved, the effect of quantitative casting of alloy liquid is achieved, and then the casting efficiency of specific workpieces is improved.

The utility model relates to the technical field of knuckle bearings, and discloses a novel centripetal knuckle bearing which comprises an outer ring, an inner ring is arranged in the outer ring, the outer ring and the inner ring are mutually connected through interference fit, a spherical ring is arranged in the inner ring, and a plurality of groups of threaded holes are circumferentially formed in the left side wall and the right side wall of the outer ring. The installation ring and the extrusion ring are matched to form a detachable sealing structure, when the installation ring is abraded due to movement of the spherical ring, the damaged installation ring can be independently replaced only by disassembling the locking bolt, the maintenance cost is reduced, the annular oil storage cavity is formed in the joint portion of the installation ring and the inner ring through the two sets of arc-shaped angles, and the service life of the annular oil storage cavity is prolonged. And finally, the rotation of the mounting ring is stopped through the matching of the bulges and the grooves, so that the abrasion caused by the simultaneous rotation of the mounting ring and the spherical ring is further avoided, and the service life of the radial spherical plain bearing is effectively prolonged.

The utility model provides a sliding mechanism for adjusting the particle size of a roller screen, which belongs to the field of screening devices and comprises two lower basic sliding rails, and two upper guide polish rods are fixedly connected in the two lower basic sliding rails; the adjusting assembly comprises a plurality of sliding bearing pedestals which are connected outside the two corresponding upper guiding polish rods in a penetrating and sliding mode, and the upper portions, close to the two sides, of every two adjacent sliding bearing pedestals are in threaded connection with the same positioning bolt. By means of the adjusting assembly, the roller screen can change the screening particle size in the production process, the flexibility of equipment is improved, meanwhile, the roller screen can adapt to production tasks with different particle size requirements, and the phenomenon that due to the fact that the screening particle size cannot be adjusted, when the material particle size needs to be changed in the production process, the material particle size is changed is avoided. The situation that the whole rolling shaft or the screening equipment needs to be replaced is avoided, the production cost is reduced, and production interruption is avoided.

To provide a sliding bearing that is less susceptible to damage caused by electrical discharge on the rotating shaft and sliding surface. [Solution] The sliding bearing 10 supports the rotating shaft of a vehicle drive motor. The sliding bearing 10 comprises a cylindrical metal base 20 and an insulating layer 30. The metal base 20 includes an inner circumferential surface 21, an outer circumferential surface 22, and two axial end faces 23. The insulating layer 30 covers the inner circumferential surface 21 and a portion of the two axial end faces 23 of the metal base 20. The metal base 20 consists of a backing metal layer 25 and a bearing alloy layer 26 joined to the backing metal layer 25 at a cylindrical radially inward position from the backing metal layer 25. The axial end face 23 consists of a first region 231 and a second region 232 located at a cylindrical radially outward position from the first region 231. The insulating layer 30 covers only the entirety of the first region 231 on the axial end face 23. In the radial direction of the cylindrical shape, the length L2 of the first region 231 is longer than the length T4 of the bearing alloy layer 26, and is 60% or less of the length T3 of the metal substrate 20.

The utility model discloses a damping type radial spherical plain bearing node which comprises a support base plate, a first lug plate and a second lug plate are fixedly installed at the two ends of the support base plate respectively, and a pin shaft is installed between the first lug plate and the second lug plate. A viscous damping mechanism, a bearing mechanism, a third lug plate and a spring mechanism are sequentially and tightly arranged on the pin shaft in a sleeving manner; the viscous damping mechanism is arranged between the first lug plate and the third lug plate, the bearing mechanism is rotationally installed in a lug hole of the third lug plate, and the spring mechanism is arranged between the second lug plate and the third lug plate. The shock absorption type radial spherical plain bearing node has the advantages of universal rotation, clear stress, simplicity in manufacturing and mounting, small node size and the like while solving the problems of temperature stress and earthquake action, and solves the problems of large temperature stress, large earthquake response, large node size and the like of the existing super-long and large-span space steel structure; wide popularization and application prospects are realized.

The invention relates to a sliding bearing (10), comprising at least one housing part (11), at least one bearing pad (12) and at least one damper (13), the bearing pad being connected at least in some regions to the damper such that vibrations input into the bearing pad can be introduced into the damper, and wherein the housing part (11) and the bearing pad (12) are connected to the damper (13) in such a way that the vibrations input into the bearing pad (12) can be introduced into the damper (13). The damper is mounted on the housing part so as to be displaceable at least in some sections such that the bearing pad can be displaced between a working position, in which the bearing pad is displaceable relative to the housing part, and a non-working position (II), in which the bearing pad is displaceable relative to the housing part, by means of a movement, in particular a linear movement, of the damper relative to the housing part. The gap size of the lubrication gap between the bearing pad and the rotor part (15) supported in the plain bearing is smaller than the gap size in the non-working position (II).

The present application relates to the technical field of bearing texture optimization, and particularly relates to a sliding bearing surface texture optimization method and system. The technical scheme of the present application comprises the following steps: obtaining a load curve of a load of a rotating shaft in a sliding bearing changing with running time and a rotating speed curve of a rotating speed changing with running time; determining characteristic working conditions of the sliding bearing in a main running cycle according to the load curve and the rotating speed curve; performing feasible region analysis on each texture parameter of the sliding bearing according to the characteristic working conditions; taking a numerical interval of each texture parameter as a friction performance prediction input of a BP neural network model, and combining a genetic algorithm to perform friction performance optimization in the numerical interval, so as to determine a parameter combination corresponding to optimal friction performance as target texture parameters of the sliding bearing. The technical scheme improves optimization efficiency and accuracy when performing global optimization on local texture of the sliding bearing.

This application discloses a method and equipment for assembling radial spherical plain bearings, relating to the field of radial spherical plain bearing manufacturing and assembly technology. It includes a worktable, with an inner ring vibratory feeder and an outer ring vibratory feeder arranged on one side of the worktable. A mechanical claw is provided between the inner and outer ring vibratory feeders. An inner ring material groove is fixedly connected to one side of the inner ring vibratory feeder, and an outer ring material groove is fixedly connected to one side of the outer ring vibratory feeder. A stamping device for press-fitting the inner and outer rings of the bearing to form a radial spherical plain bearing is installed on the worktable. A receiving box for collecting the radial spherical plain bearings is provided below the worktable, and a discharge chute connected to the receiving box is provided on the worktable. This application addresses the problems of high labor intensity and low production efficiency that still require workers to manually place the inner and outer rings of the bearing into the inner ring feeding structure and the outer ring feeding mechanism during the existing radial spherical plain bearing assembly process.

The invention relates to the technical field of bearing materials, and discloses a preparation method of a sliding bearing and the sliding bearing. The preparation method of the sliding bearing comprises the steps that copper alloy powder is prepared in a gas atomization mode, and the copper alloy powder and a pore forming agent are mixed to obtain mixed powder; the mixed powder is placed in a grinding tool to be pressed into a first blank, and the first blank is demolded; gradient heating sintering is conducted on the first blank according to a powder metallurgy mode, and a second blank is obtained; the second blank is soaked in a self-lubricating solution for a certain time and then taken out, and the second blank is cured and degreased to obtain a shaft sleeve; the shaft sleeve is in interference fit with the outer surface of the pin shaft in a hot sleeving or cold mounting mode, and a sliding bearing is obtained; the manufactured sliding bearing has the self-lubricating capacity, the anti-attrition effect of the sliding bearing under different working conditions can be improved, and meanwhile the service life of the sliding bearing can be prolonged.

The invention relates to a sliding bearing parallelism adjusting system and an adjusting method thereof. The sliding bearing comprises a bearing body, and a first pressure measuring hole and a second pressure measuring hole are formed in the bearing inner hole wall of the bearing body; the parallelism adjusting system comprises a pressure measuring unit which comprises a first pressure detecting piece used for detecting the pressure of fluid at a first pressure measuring hole and a second pressure detecting piece used for detecting the pressure of fluid at a second pressure measuring hole; the pressure supply unit is connected with the pressure measuring unit through a fluid pipeline and used for providing pressurized fluid for the pressure measuring unit. Pressurized fluid is provided for the pressure measuring unit through the pressure supply unit, the fluid pressure at the first pressure measuring hole and the fluid pressure at the second pressure measuring hole in the inner wall of the bearing body are detected, parallelism deviation is converted into measurable and comparable physical pressure signals, and a basis is provided for installation and maintenance of the sliding bearing. And the equipment operation risk caused by insufficient installation precision is avoided.

The invention relates to a main bearing housing (1) for a rotor (2) of a wind turbine (3), which is prepared to receive a plurality of plain bearing segments (4), characterised in that the main bearing housing (1) is axially (5) divided in order to remove or insert the plain bearing segments (4). The invention further relates to a main bearing (14) for a rotor (2) of a wind turbine (3), comprising a main bearing housing (1) according to one of the preceding claims, wherein the main bearing (14) is designed as a hydrodynamic plain bearing. Furthermore, the invention relates to a wind turbine (3) having a rotor (2) which is mounted in a main bearing (14) according to claim 8, and to a method for carrying out service work on a main bearing (14) according to claim 8, wherein at least part of the main bearing housing (1) which is divided at the separating plane (8) is displaced axially (5) and the plain bearing segments (4) are removed, exchanged or inserted.

In order to produce a bearing body (1) for a sliding bearing, first a surface (5) of the metal body (2) is directed, and in each case a hole (6) extending obliquely with respect to the surface (5) is created in this manner as a form-fitting contour (4), and then projections (7) are created, such that an incidence point (X) is positioned centrally on each projection (7) in at least one direction, an outlet opening (8) of the hole (6) is located on a side face (9) of each projection (7).

Plain bearing (1), comprising a bearing housing (2) and bearing segments (3), wherein the bearing housing (2) has an opening (4) which is dimensioned such that at least one bearing segment (3) can be inserted exclusively in a defined orientation through the opening (4), and wherein the bearing segment (3) is positioned behind the opening (4) such that the opening (4) is partially covered by the bearing segment (3) and diametrically opposed sections (5, 6) of the bearing segment (3) are supported on the bearing housing (2).

The invention relates to a valve for regulating a fluid flow in a fluid circuit and to the use of the valve. The invention relates to a valve for a fluid flow, in particular a refrigerant in a refrigerant circuit, comprising: a housing with at least two fluid connections; the valve needle is arranged in the shell and can move between a first end position and a second end position along the longitudinal axis of the valve in the axial direction relative to the shell; a plain bearing sleeve having an axial passage and an axial stud forming a longitudinal slot opening; a rotor provided with an internal thread and rotatably mounted on the axial stud of the sliding bearing sleeve; and a shaft connected to the valve needle, the shaft being guided in the axial passage of the sliding bearing sleeve, the shaft having a threaded section, the latter being guided in the axial longitudinal groove opening of the sliding bearing sleeve against a relative torsion between the shaft and the sliding bearing sleeve, the external thread of which radially protrudes beyond the circumference of the axial stud and engages with the internal thread of the rotor, such that the shaft is axially translationally movable relative to the plain bearing sleeve by rotating the rotor.

Plain bearing (11) for an aircraft turbomachine, this plain bearing (11) comprising a tubular body (10b) including: - an external cylindrical surface (20aa), - an internal cavity (10c) for containing oil, - a main lubrication groove (24) which is formed on a median part (20aa1) of the external surface (20aa), and - a main oil supply channel (10d) for the main groove (24), characterized in that the external surface (20aa) of the body (10b) further includes at least one secondary lubrication groove (26) which is formed on an end part (20aa2, 20aa3) of the external surface (20aa) and which is independent of the main groove (24), and in that the body (10b) further includes a secondary oil supply channel (27) for the or each secondary groove (26). Figure for the summary: Figures 6a-6c

The invention relates to a cleaning device for a sensor, comprising a wiper arm, a support and a belt drive having a motor, a first pulley, a second pulley and a drive belt, the cleaning device being arranged to be mounted on the sensor by means of a fastening element of the support, the first pulley is fastened to a shaft of the motor, the motor is fastened to the support, the second pulley has a first receiving element in the region of the axis of rotation of the second pulley, the support has a second receiving element matched with the first receiving element, and the first receiving element and the second receiving element are inserted into each other. The transmission belt is guided by the first pulley and the second pulley, and the wiper arm is fastened to the transmission belt and is arranged so as to wipe the wiper arm in a state in which the cleaning device is mounted on the sensor. The surface to be cleaned of the sensor is moved by activating the motor.

The application discloses an automatic grinding device for sliding bearing finishing, and relates to the technical field of machining, aiming to solve the technical problem that the existing device cannot complete the finishing of sliding bearings with different mechanism properties in one clamping, comprising a clamping table, a feeding mechanism, a bearing clamp, a grinding spindle box and a grinding head group. The grinding spindle box is provided with a rotating assembly, a movable assembly, a follow-up assembly and a linkage assembly. By controlling the follow-up assembly and the rotating assembly, the grinding head group can switch between single-rotation grinding and rotation-reciprocating composite grinding, thereby realizing high-precision geometric forming and surface texture processing of the bearing inner hole. The grinding head group is integrated with expansion units and ball grinding units. By self-rotation of each ball grinding unit and precise feeding of the feeding mechanism, the precision milling and grinding of the inner wall discrete oil storage pits are completed. The application realizes the finishing of multiple mechanisms in one clamping, and solves the precision and efficiency problems caused by process separation.

To provide a sliding bearing that is less susceptible to damage caused by electrical discharge on the rotating shaft and sliding surface. [Solution] The sliding bearing 10 supports the rotating shaft of a vehicle drive motor. The sliding bearing 10 comprises a cylindrical metal base 20 and an insulating layer 30. The metal base 20 includes an inner circumferential surface 21, an outer circumferential surface 22, and two axial end faces 23. The insulating layer 30 covers at least the inner circumferential surface 21 and the two axial end faces 23 of the metal base 20. The maximum thickness of the insulating layer 30 covering the axial end faces 23 of the metal base 20 is 50% or less of the minimum thickness of the insulating layer 30 covering the inner circumferential surface 21 of the metal base 20.

The invention relates to a workpiece holder (10), in particular for a holding and sealing device (5) of a plasma treatment system (1), comprising a support (11) forming a workpiece receptacle (11a) and a holding element (12, 12', 12") which is movably guided on the support (11) via a sliding bearing. The sliding bearing has a first bearing surface (17a, 17a') against which a second bearing surface (12a') rests. According to the invention, the first bearing surface (17a, 17a') and / or the second bearing surface (12a') are interrupted.

The application provides a self-lubricating joint bearing and a spherical surface shaping method, which comprises a bearing outer ring, a bearing inner ring and a self-lubricating gasket; the bearing inner ring is provided with the bearing outer ring on the outer side, and the self-lubricating gasket is arranged between the bearing outer ring and the bearing inner ring; the outer surface of the bearing inner ring is provided as a spherical surface, the inner surface of the bearing outer ring is provided as a spherical surface, and the self-lubricating gasket is bonded on the inner surface of the bearing outer ring. The application provides a spherical surface shaping method after the self-lubricating joint bearing is extruded, which plays a role in stabilizing the torque while rounding the spherical surface, and effectively reduces the unqualified rate of the bearing.

The utility model relates to the technical field of load monitoring, and solves the problems that during load monitoring sampling of an electric power system, a cable in the electric power system needs to be moved when a monitoring position is replaced due to the fact that the cable is long, and the cable is damaged due to friction between the cable skin and the device. The distributed load monitoring sampling device comprises a shell A, a shell B is hinged to the edge of the side face of the shell A, U-shaped grooves are formed in the inner wall of the shell A and the inner wall of the shell B, sensing modules are arranged in the U-shaped grooves, and positioning assemblies are arranged at the tops and the bottoms of the shell A and the shell B; the positioning assembly comprises a semicircular plate, a threaded hole is formed in the middle of the side face of the semicircular plate, a threaded rod is in threaded connection with the interior of the threaded hole, a positioning plate is arranged at one end of the threaded rod, and a plurality of sliding bearings are arranged on the surface of the positioning plate. An elastic clamping piece is arranged on the edge of the other side face of the shell A. A clamping groove is formed in one end of the elastic clamping piece.

The invention relates to a centrifugal pump having at least one impeller (4, 7, 8) which sits on a drive shaft (14). The drive shaft (14) is supported by a device (18) which comprises at least one media-lubricated plain bearing, wherein the plain bearing comprises an inner arrangement (20) which is connected to the drive shaft (14) for conjoint rotation and comprises an outer arrangement (21) which is positioned in a stationary manner in the suction housing (4). A gap is formed between the inner arrangement (20) and the outer arrangement (21). The outer arrangement (21) has an element with a cylindrical inner face (22), said element being formed on the basis of at least one polymeric material. The outer arrangement (21) comprises sealing elements (26) for fixing a further element (23).

Method for controlling the operation of a plain bearing, comprising the steps: a) Determining the temperature dependence of the dynamic viscosity of the lubricant in the plain bearing; b) Determining the transition temperature of the sliding bearing from semi-fluid friction to fluid friction; c) Determining the temperature dependence of the bearing characteristic λ(T) and the value of the bearing characteristic λ kr of the sliding bearing transition from semi-liquid to liquid friction based on the temperature dependence of the dynamic viscosity of the lubricant; d) Measuring the operating temperature of the plain bearing; e) Adjusting the operating temperature of the plain bearing to determine the bearing characteristic λ Rab near λ kr to be kept in a range that forms a transition between semi-fluid friction and fluid friction.