1136 results about "Slider bearing" patented technology

The invention discloses a large-sized high-pressure movable bend structure which comprises a connector, bends and hinging assemblies. The connector and the bend, and the bends are connected by the hinging assemblies. The connector is connected to upstream and downstream equipment. Each hinging assembly comprises a sealing mechanism, a rotating part and a hoop. The sealing mechanism is used for hermetically connecting the connector and the bend, and the bends. The hoop is used for connecting and fixing the connector and the bend, and the bends. The hoop and the connector or the hoop and the bend are connected by the rotating part. The rotating part is a rolling bearing or a sliding bearing. The large-sized high pressure movable bend structure has the beneficial effects that the structure islarger in diameter, flexible to connect, small in size, light in weight and diversified in forming mode, meets the operation demand of high pressure and large displacement of shale gas, lowers the input cost of operation equipment greatly, optimizes the site layout and is connected to the upstream and downstream equipment flexibly.

A sliding bearing, which comprises a lining and a bismuth or bismuth-alloy overlay having improved compatibility and fatigue resistance is provided. The overlay is characterized by the following orientation. The relative ratio of the X-ray diffraction intensity I[hkl] of the bismuth or bismuth-alloy overlay defined below satisfies the following conditions (a) and (b):(a) the relative ratio of the X-ray diffraction intensity I[hkl] of planes other than the {012} planes is from 0.2 to 5 times as high as the ratio of the X-ray diffraction intensity I[012], namely, 0.2I[012]<=I[hkl]<=5I[012](b) the relative ratio of the X-ray diffraction intensity I[hkl] of three or more planes other than {012} planes ranges from 0.5 to 2 times as high as the ratio of the X-ray diffraction intensity I[012], namely, 0.5I[012]<=2I[012].

The invention discloses an online test method for a characteristic parameter of a bearing-rotor system. The online test method comprises the steps of: installing a signal acquisition system on the bearing-rotor system supported by a sliding bearing; regulating the rotation speed of a main shaft, and starting a drive motor and a signal acquisition instrument; acquiring vibration signals of specific positions in real time by an eddy current displacement sensor, and storing the vibration signals by the signal acquisition system; establishing a bearing-rotor system model by adopting a finite element method; and applying a characteristic parameter optimization method of the bearing-rotor system based on combination of machinery dynamics modeling with a genetic algorithm to ensure that a theoretical vibration state obtained through the simulation model is close to an actual measurement value, thereby realizing online solving of the rigidity and damping coefficient of the sliding bearing, the off set of a rotor and the like of the bearing-rotor system. Compared with the traditional method, the online test method disclosed by the invention has the obvious advantages that external excitation or multiple machine start/stop does not need to be performed on the bearing-rotor system, and the online test method is simple and reliable and has the characteristics of high efficiency, high stability and high precision.

The invention discloses a multi-index high-speed dynamic detection and material dividing method and device of an annular sliding bearing. According to the method, multiple indexes of the outer surface size and the inner surface coating defects of the sliding bearing are dynamically detected through machine vision, material division is carried out on workpieces according to the detection result through the color recognition technology of machine vision, and the method has the advantages of being high in detection efficiency, accurate in recognition, high in automation degree and the like. The device comprises a roller, a conveying belt, a high-definition camera, a digital control spraying device, an electric switch, a computer system and the like, wherein the high-definition camera is used for carrying out multi-index dynamic detection on the sliding bearing rotating in a fixed-axis mode, whether defects exist is recognized and material division is carried out through the high-definition camera and a limiting switch, the detecting speed is as high as 120-180 per second, the recognition accuracy is as high as 100 percent, automatic production is fully realized, and the detection cost is largely reduced.

Slide bearings and methods of producing slide bearings are disclosed. The slide bearing has a metal support, an adhesive layer and a sliding layer. The adhesive layer is applied directly to the metal support. The adhesive layer comprises a blend of at least two fluoropolymers P1 and P2, wherein P1 is selected from perfluoroalkoxyethylene (PFA) or tetrafluoroethylene-hexafluoropropylene (FEP). P2 is different from P1 and can be a fluoropolymer.

The invention relates to an in-slot self-cooling high-speed permanent magnetic motor system for a compressor and belongs to the technical field of motors. The megawatt high-speed variable-frequency motor comprises a cooling water jacket, a stator core, a stator winding, a stator radial air channel, an inner stator air channel, a permanent magnet rotor, two sliding bearings and two compressor impellers. The system has the advantages that the problems of severe heat and uneven temperatures of a high-speed motor rotor can be solved effectively; the problems of the over-temperature and overlarge axial temperature gradient of the stator core are solved; and not only the strength problem of a permanent magnet under a condition of high-speed rotation of the rotor can be solved mechanically, but also higher harmonics can be effectively prevented from entering the permanent magnet and generating added losses electromagnetically.

The invention discloses a device for testing material creep under the coupling action of tensile stress and the environment. The device comprises a support, a weight, a heating jacket, a container containing a saturated inorganic salt solution, a strain demodulator, a power supply, a temperature controller, a strain sensor and a test piece, wherein the support comprises a positioning plate, an upper spherical hinge, an upper clamping head, a supporting rod, a bearing plate, a base plate, a lower clamping head and a lower spherical hinge; the supporting rod is connected with the bearing plate through a sliding bearing; the test piece is embedded in a groove in the upper clamping head and a groove in the lower clamping head; the weight is positioned on the bearing plate; the heating jacket covers on the outer side of the support; the container is positioned between the support and the heating jacket; the strain sensor is adhered to the outer wall surface of the test piece; and the temperature controller is connected with the ring-shaped heating jacket. By adopting the device, the reliability of the test process can be improved, and the accuracy of results is ensured. Meanwhile, the invention also discloses a test method for the test device. The method is simple and easy to operate, and can keep that the test piece does not generate stress relaxation in the process of long-term load application, and the stress is uniformly distributed.

A changeable-length fourth axis of a delta robot has a first bar (82) and a second bar (83), which can be displaced parallel to one another in a slide bearing (84, 85). They are connected to articulation heads (80, 81) for leading in an incoming torque and for leading out an outgoing torque. The first and second bars (82, 83) are arranged here such that the incoming torque runs in a direction which is parallel to, but offset from, the direction of the outgoing torque. This fourth axis allows precise torque transmission, but is nevertheless of straightforward construction, has a high bending strength and relatively low weight and can easily be cleaned by being washed down.

The invention discloses a wire controlled wheel independent steering execution mechanism and a wheel assembly. The wire controlled wheel independent steering execution mechanism comprises a steering gear, a lower master pin, a master pin thrust bearing, two master pin sliding bearings with the same structure, an upper master pin, a steering motor and photoelectric encoder combined unit, and a torque sensor. The output shaft of the steering motor is connected with the input shaft of the steering gear by a coupler, the output shaft of the steering gear is in key connection with one end of the torque sensor through the upper master pin, the other end of the torque sensor is in key connection with the other end of the torque sensor, the lower end of the upper master pin is sleeved with the master pin sliding bearing and is in dynamic fit with the master pin sliding bearing, and the lower master pin is sleeved with the master pin sliding bearing and the master pin thrust bearing, which have the same structure, in turn from top down, and is in dynamic fit with the master pin sliding bearing and the master thrust bearing. The wheel assembly comprises a tire, a hub, an annual hub motor, a brake, an annular brake disc and the line controlled wheel independent steering executing mechanism. The annular hub motor consists of an annular hub motor outer rotor, a large-diameter cone roller bearing, a steering joint and a motor inner stator component.

The present invention provides a high-accuracy sliding bearing which eliminates the need for treating a gate mark, has a high accuracy, is excellent in its mechanical strength, and is in its productivity. A sintered metal (2) is used as a bearing peripheral part. A resin material is molded at a sliding portion of the bearing peripheral part to form a resin layer (3). In the resin layer (3), a product of a coefficient of linear thermal expansion of the resin material and a thickness of the resin layer is not more than 0.15. The resin layer (3) is molded through tunnel gates. The resin layer comprises a plurality of axial grooves (4A) and (4B) on a bearing sliding surface thereof, and the tunnel gate marks (5) are alternately formed on a bottom of each of the grooves.

The invention discloses a parallel mechanism having a reconfigurable characteristic. The parallel mechanism comprises a base component, first, second and third branch chain components, lower shafts of the first, second and third branch chains, middle shafts of the first, second and third branch chains, a middle platform component and a tail end platform component, wherein a bearing seat at the rear end of the lower part of the first branch chain is connected with a first base slider bearing seat on the base component through the lower shaft of the first branch chain; the bearing seat at the front end of the lower part of the first branch chain is connected with a first middle platform bearing seat of the middle platform component through the middle shaft of the first branch chain; an end cover of the upper part of a first spherical hinge of the first branch chain component is connected with a first tail end platform connecting part of the tail end platform component; the second and third branch chain components are totally the same as the first branch chain component; a bevel gear of a base rotates to drive a wing plate screw to rotate so that a rectilinearly-moving slider of the base performs rectilinear motion along linear guide rails of the base; a screw motor rotates to drive a middle rectilinearly-moving screw to rotate, so that a middle rectilinearly-moving slider can move along middle rectilinearly-moving guide rails.

The invention discloses a sliding bearing universe lubricant film thickness distribution detection method to realize real-time detection of the sliding bearing universe lubricant film thickness distribution under an actual working condition. The method comprises the following steps: through the finite difference method, iterating to solve the lubricant basic equation of the sliding bearing to acquire the theoretical distribution of the lubricant film thickness of the sliding bearing, then, according to the theoretical distribution of the lubricant film thickness of the sliding bearing, determining the positions of distributed measure points of the sliding bearing, at the selected positions of the measure points, mounting circular sheet ultrasonic sensors in an embedded manner, and acquiring the real-time film thickness values of all measure points by adopting the ultrasonic film thickness measurement technology, and finally, performing interpolation on the measured lubricant film thickness values at all distributed measure points to acquire the distribution of the lubricant film thicknesses of the sliding bearing under the actual working condition.

Disclosed is an ultrasonic probe having an organism contact portion that is shaped for use along a comparatively large curvature and can easily be used while closely contacting an organism, and that has an adequately reduced size. According to the technique of the invention, a first cylinder pulley 5, secured to a probe casing 7, an arm 16, secured to a motor spindle 17 that is extended through a first pulley, and a second cylinder pulley 8, rotatably arranged on the opposite side, are coupled together by a wire 6. The second pulley is equipped with a slider shaft 14 that is arranged, in an extensible manner, by a slider bearing 15. The slider shaft is quipped with a roller 10 that contacts a guide rail 12 of the probe casing, and an ultrasonic element 2 is attached to the distal end of the slider shaft to provide the telescopic structure for the slider shaft. In this manner, the size of a scanning mechanism, for oscillating the ultrasonic element along a large curvature, is reduced.

The invention relates to a mechanical components industry regulation hole coaxial between the methodology and regulation components, in particular the aviation, aerospace, civil and other mechanical structure of the multi-hinge assembly point. Double eccentric bushing from the eccentric bushing and the eccentric bushing composition, the eccentric bushing diameter and the outer diameter of a round circle of eccentric and the eccentric bushing diameter and the outer diameter of a round of the same circle of eccentric, and, Bushing end of the shaft is the first shoulder. Double eccentric bushing used in the eccentric bushing and the eccentric bushing with a certain amount of tolerance, through the inner and outer sleeve of repeated eccentric rotation adjustment can be realized coaxial connection points more than the match, and for each hub Heart of the biggest angle adjustment of not more than 360 degrees, adjust volume small. This greatly reduces the difficulty of assembling and because of the internal and external sleeve with tolerance, as well as components and assembly hub between the matching hole in the machining tolerances can be very good at that in the assembly, so there is no need to conduct a follow-up processing, reducing assembly time.

A method of lubricating and cooling a hydrodynamic plain bearing for a rotating element comprises the steps of supplying fresh, cold lubricant under pressure from a pressure chamber arranged upstream of a fixed gliding plane to a lubricating gap between the fixed gliding plane and the rotating element, the supply of fresh, cold lubricant being so controlled that an effective lubricating wedge is formed between the rotating element and the fixed gliding plane. The pressure chamber is connected to a decompression chamber predominantly filled with gas and arranged upstream of the pressure chamber by a mixing conduit, used, hot lubricant adhering to the rotating element is moved to the decompression chamber, and a portion of the used, hot lubricant is removed from the decompression chamber while the remaining portion of the used, hot lubricant flows from the decompression chamber into the mixing conduit and is mixed with fresh, cold lubricant flowing countercurrently in the mixing conduit whence the mixture is pressed into the decompression chamber.

The invention discloses a generator rotor unbalance magnetic tension testing bench supported by sliding bearings, which includes a variable magnetic pole logarithmic generator rotor main shaft system and a testing bench basic framework. The rotor main shaft system includes a generator rotor, a front sliding bearing support subsystem, a sensor bracket, a stator front end cover, a generator rotor core and a magnet exciting coil, a generator stator, a collecting ring, a carbon brush bracket, a carbon brush, a stator rear end cover, and a rear sliding bearing support subsystem. The generator rotor core and the colleting ring are both mounted on the generator rotor, front and rear ends of the generator rotor are supported by the front and the rear sliding bearing support subsystems, and the generator stator is mounted outside the generator rotor. The testing bench basic framework includes an electromotor, a low-speed coupler, a speed-changing gear box and a high-speed coupler, wherein the electromotor is connected with a low-speed shaft of the speed-changing gear box through the low-speed coupler, and a high-speed shaft of the speed-changing gear box is connected with the generator rotor through the high-speed coupler.

The invention discloses a horizontal axis ocean current energy electric generator variable-pitch device and a horizontal axis ocean current energy electric generator. The variable-pitch device comprises a driving part which is a motor or a hydraulic motor, a screw rod which is fixedly connected with an output shaft of the driving part through a coupler and a push plate which is arranged on the screw rod in a sleeving mode and is in threaded connection with the screw rod. The left end of the screw rod is supported through a pair of centripetal thrust bearings. The right end of the screw rod extends into the left end of a central hole of a spindle flange and a spindle. A first sliding bearing is formed between the screw rod and the left end of the central hole of the spindle flange and the spindle. Electric slip rings or a hydraulic slip ring are/is mounted at the right end of the spindle. One gear rack is fixed to each side surface of the push plate, each gear rack is engaged with a gear wheel, all the gear wheels are fixedly connected with the roots of corresponding blades through variable-pitch flanges, and second sliding bearings are formed between the variable-pitch flanges and the wheel hub wall. An angle transducer is installed at the left end of the driving part. By means of the horizontal axis ocean current energy electric generator variable-pitch device and the horizontal axis ocean current energy electric generator, the variable-pitch angle larger than 180 degrees can be achieved, therefore, double-way electricity generation is achieved, unified pitch variation can be achieved, and operation is stable.

The invention discloses an AGV (automatic guided vehicle) elastic support driving device using a hub motor. The AGV elastic support driving device comprises a support fixing frame, a driving wheel bracket, a guide rod, a linear sliding bearing with a flange, a cylindrical spiral spring, the hub motor, a photoelectrical rotary encoder, an encoding small gear, and an encoding large gear, wherein the linear sliding bearing with the flange is fixedly arranged on the support fixing frame, and forms a vertical sliding pair together with the guide rod, the guide rod is fixedly connected with the driving wheel bracket through thread connection, and the cylindrical spiral spring is arranged on the lower part of the guide rod to realize elastic support; the two ends of a main shaft of the hub motor are sheathed on U-shaped grooves of the driving wheel bracket. The invention also discloses an AGV. The AGV elastic support driving device has the advantages that by adopting the elastic support, a driving wheel can compress the ground when the ground is not flat, so that the slipping and idle running are avoided, the vibration of the vehicle body is reduced, and the driving accuracy and stability are improved; the adverse factors caused by the installation of speed reducers are avoided, the running reliability is improved, the structure of the driving device is simplified, and the size of the vehicle body is further reduced.

The embodiment of the invention discloses a preparation method of CuSn10Bi3.5 copper-bismuth alloy powder. The method comprises the following steps of: selecting 85-88 percent by weight of copper, 9-11 percent by weight of tin and 3-4 percent by weight of bismuth, adding the copper into a smelting furnace, heating to 1,080 DEG C in an atmospheric air atmosphere for smelting, adding the tin and the bismuth after smelting, and smelting to form alloy liquid; after detecting that components are qualified, heating to 1,150-1,180 DEG C; removing residues by scooping, injecting the alloy liquid into a stopper ladle, and atomizing by using a free-falling type rectangular annular ring nozzle under the water pressure of 4-5MPa under the protection of inert gas to form alloy powder; dehydrating and drying the alloy powder; and sieving to prepare finished CuSn10Bi3.5 copper-bismuth alloy powder between -150 meshes and +350 meshes. The copper-bismuth alloy powder is prepared by adopting melting and water mist methods, so that the CuSn10Bi3.5 copper-bismuth alloy powder can be taken as a friction reducing coating material in an engine sliding bearing.

The invention relates to a master-auxiliary vane pump and a stator decompression method, being designed to solve the technical problems of the prior vane pump or master-auxiliary vane pump of inconvenient maintenance, large working pressure of vanes and short service life. The vane pump is characterized in that a second O-shaped ring is arranged at the joint of a front cover and a rear cover; a first O-shaped ring and a second polyfluortetraethylene retainer ring are arranged at the joint of a pump core and the front cover; the pump core is inserted in a pump body by a pin; a transmission shaft is supported in the pump body by a rolling bearing and a sliding bearing on a rear oil-distributing disc; and a front oil-distributing disc is in a taper shape and is in clearance fit with the front cover. In the stator decompression method, a middle pressure chamber is formed between the master vane and the auxiliary vane in a cavity between a rotor and a stator, and the width of the auxiliary vane is 1/3-1/4 of that of the master vane. The invention has simple structure, reasonable design, convenient maintenance, assembly and disassembly of the pump core, low working pressure of vanes, long service life, obvious effect of the decompression method and low pressing force of stators, thereby being suitable for transferring various fluids and improving like products.

The invention discloses a sliding bearing material of elastoplastic polymer alloy, comprising the raw materials of the following mass portions: 100-120 portions of prepolymer resin, 20-45 portions of crosslinking curing agent, 1-6 portions of antiwear agent, 2-17 portions of lubricating agent, 0.1-1 portion of defoamer and 0-0.5 portion of pressure additive. The material has the characteristics of wear resistance, impact resistance and high limit PV value, and suitably used as a nonmetallic bearing material for water or self lubricating.