124 results about "Dry friction" patented technology

The invention belongs to the technical field of wind power generation equipment, and discloses a sliding bearing, a wind power main gear box and a wind turbine generator. The sliding bearing includes a sliding layer. The sliding layer is deposited on the surface of the first member. When the first component and the second component rotate relatively, a lubricating oil layer is formed between the sliding layer and the second component, and the lubricating oil layer serves as a lubricating film with certain bearing capacity and can separate the sliding layer from the solid surface of the second component, so that dry friction is converted into liquid friction among molecules in the lubricating oil layer; the friction coefficient between the sliding layer and the second component is remarkably reduced, and therefore abrasion between the sliding layer and the second component is reduced. The sliding bearing has the advantages of being small in size, light in weight and good in economical efficiency. The sliding layer is made of the wear-resistant material and is deposited on the first component, so that the sliding layer forms a high-hardness and wear-resistant coating on the surface of the first component, and the service life of the sliding bearing can be prolonged.

The invention discloses a wet clutch sliding friction state prediction method based on friction pair fluid-solid heat behavior calculation and a vehicle, and the method comprises the steps: carrying out the iterative calculation of the internal fluid-solid pressure, oil film thickness and rough contact area of a friction pair based on the structure and working condition parameters of a wet clutch through a fluid-solid bearing equation, and representing the fluid-solid coupling behavior of a friction gap; a heat-source-input-free heat balance equation and a contact temperature continuity equation are established in combination with physical property parameters, the sliding friction interface heat flow dynamic distribution proportion is calculated at the same time, and a wet clutch temperature field prediction model is established by superposing heat conduction characteristics; through a non-dominated sorting genetic algorithm, clutch dry friction test data and a rough torque model considering radial temperature difference are fused, a rough friction coefficient-temperature fitting equation is solved, and a temperature field prediction model is combined to achieve updating of rough friction coefficients under different thermal load characteristics; and rough torque and viscous torque are respectively solved by integrating fluid-solid heat behaviors of the wet clutch, and the rough torque and the viscous torque and the temperature field jointly represent the sliding friction state of the wet clutch.

The invention discloses a martensite reinforced self-lubricating copper-based alloy coating and a laser cladding preparation method thereof, the martensite reinforced self-lubricating copper-based alloy coating comprises the following components in percentage by mass: 66 to 84 weight percent of Cu, 10 to 20 weight percent of Al, 3 to 10 weight percent of Ni, 3 to 10 weight percent of Mn, 0 to 2 weight percent of Sn and 0 to 2 weight percent of Pb. In the preparation process, the laser input energy density is controlled within the range of 8.96-13.27 J / mm, and the double strengthening effects of grain refinement and martensite content increase can be synchronously achieved. The main phase structure of the obtained coating is twin-crystal martensite, meanwhile, the coating contains a small amount of alpha-Cu lubricating phase, gamma phase and Fe-rich hard phase, and the dry friction coefficient of the coating is 1t; 0.35, and the solidification hardness gt; and the voltage is 350HV. Compared with the existing self-lubricating tin-based babbitt metal and copper-tin alloy with similar friction coefficients, the coating disclosed by the invention realizes synergistic improvement of high hardness and low friction performance, and is particularly suitable for dynamic friction and wear working conditions with higher impact resistance requirements, such as robot motion joints, precision mechanical transmission parts and the like.

The invention relates to a glass insulator with a protection function, and belongs to the technical field of insulators, conditional starting of a cleaning assembly is realized through a wind power triggering assembly, an elastic reset part controls engagement or disengagement of a pawl part and a ratchet wheel under the action of wind power, and when the wind power is small, the elastic reset part cannot generate enough displacement, so that the cleaning assembly is cleaned. The pawl part is separated from the ratchet wheel, and the ratchet wheel idles and the cleaning assembly is kept static, so that the surface abrasion of the insulator body caused by continuous dry friction in small wind is avoided; when wind power is large, the elastic reset part moves to enable the pawl part to be meshed with the ratchet wheel, the ratchet wheel drives the annular rotating part to rotate in one direction, the cleaning assembly is driven to conduct cleaning, and the problem that in the stable strong wind and fixed wind direction environment, the cleaning efficiency is low due to wind power changes in a wind-driven self-cleaning scheme is solved; and the problems of insulator abrasion and mechanical fatigue are also caused.

The bearing closing-in device comprises a closing-in device body, oil injection tanks are fixedly installed on the two sides of the top of the closing-in device body, push rods are fixedly installed on the two sides of the top of an inner cavity of each oil injection tank, a supporting plate is fixedly installed at the output end of each push rod, and a pressurizing plate is fixedly installed at the bottom of each supporting plate through a support. An oil bag is fixedly installed at the bottom of an inner cavity of the oil injection box, and one side of the oil bag communicates with a spray head through a pipeline. According to the technical scheme, the problems that an existing bearing closing-in device does not have an automatic oil injection function, lubricating grease or lubricating oil needs to be regularly and manually supplemented, especially under the severe working conditions of high load, high temperature, high dust and the like, the oil injection period can be shortened to be once per day or per shift, manual operation consumes time and labor, the labor cost of enterprises is increased, and the working efficiency is high are solved. If oil is not injected in time due to negligence or scheduling problems, the temperature of the bearing closing-in device can be rapidly increased due to dry friction, and the problems of surface abrasion, gluing and even locking are caused.

The utility model discloses a road roller press roll device capable of reducing noise and improving efficiency, which comprises an outer cylinder part and an inner cylinder part, and the inner cylinder part is positioned at the central position of the outer cylinder part; end covers are arranged at the two ends of the outer cylinder part, center hole positions are formed in the end covers, an inner cavity of the outer cylinder part is sealed by the end covers, the inner cylinder part is arranged in the center hole positions in a matched mode, and liquid inlets are formed in the end covers. The hollow inner cavity of the compression roller device is filled with lubricating oil, so that the weight of the compression roller device is increased, the compression roller device can make a depressed sound in the rolling process, and noise generated in construction can be reduced; the lubricating oil can lubricate the bearing between the horizontal fulcrum shaft and the center hole position of the compression roller device while increasing the weight of the compression roller device, and the situation that normal work and rest, work and study of local residents are affected due to noise generated by dry friction between movably matched parts is avoided.

The utility model relates to die casting die technical field provides a kind of water leakage prevention structure and die casting die for die casting die, die casting die has mould frame, needle hole and water channel are provided in mould frame, water cooling pipe is installed in water channel, needle is slidably worn in needle hole, water leakage prevention structure includes: protective sleeve, it is inserted in needle hole and is sleeved in the outer periphery of needle, the guide hole that is penetrated is provided in protective sleeve, needle is slidably worn in guide hole;When needle moves relative to mould frame, needle slides along guide hole, and mechanical isolation layer is formed between needle and mould frame matrix. The design avoids the direct contact between needle and mould frame metal, significantly reduces dry friction, occlusion and risk of injury, effectively slows down the wear rate of inner wall of needle hole. Especially in the area where the distance between needle hole and water channel is small, this structure helps to maintain the stability of the structure wall thickness, delays the local weakness problem caused by long-term wear, thereby greatly reducing the risk of cooling water leakage.

The utility model relates to the technical field of injection molding machines, and particularly discloses a template hinged support for reducing oil leakage during injection molding of a PET foamed sheet, which comprises a bottom plate, a pin support, an oil storage assembly and a connecting pin, the bottom plate is detachably connected to the template; the pin support is fixedly connected to the side, away from the formwork, of the bottom plate, and a pin hole is formed in the pin support. The oil storage assembly is arranged in the pin hole and used for storing lubricating oil. The connecting pin rotatably penetrates through the pin hole, and the side wall of the connecting pin slidably abuts against the hole wall of the pin hole and the oil storage assembly. The mold plate hinge seat has the effects that the probability of dry grinding caused by oil leakage on the surface of the connecting pin in the mold plate hinge seat during injection molding is reduced, and the service life of the connecting pin is prolonged.

The application provides a low-friction high-wear-resistance resin-based composite material and a preparation method and application thereof, and belongs to the field of composite materials. The polytetrafluoroethylene nano powder modified by radiation is used together with inorganic filler particles such as graphite nano powder, molybdenum disulfide nano powder and the like to prepare a polyphenylene sulfide-based composite material at a certain compounding ratio. The composite material shows excellent tribological properties. On this basis, by adding a chopped carbon fiber and the like as a reinforcing filler, a high-strength, low-friction high-wear-resistance polyphenylene sulfide-based composite material is prepared by using a multi-scale functional filler network structure constructed inside the composite material. The technical process route of the application is simple, and the manufacturing cost is low. The application can be used for preparing friction protection parts, low-friction wear-resistant structures, wear-resistant bearings, self-lubricating parts, mechanical gaskets and the like under dry friction, and has a very broad application prospect in the fields of aerospace, transportation, electronic devices and high-end mechanical equipment.

This utility model relates to the field of flow rail technology and discloses a shaftless flow rail. The shaftless flow rail includes a frame, inside which rollers are arranged, and a central shaft is fixedly connected to the outer wall of each roller. A connecting assembly is also arranged inside the frame. In this shaftless flow rail, lubricating oil flows along the central shaft to the steel balls, and the lubricating oil is periodically released to avoid excessive waste, prevent dry friction, reduce wear, and reduce dry friction noise between the central shaft and the steel balls. This also reduces structural resonance caused by shaking and collision. The steel balls press against the central shaft, achieving automatic centering and limiting of the central shaft, reducing shaking caused by eccentric rotation, thereby reducing structural resonance and noise sources. The lubricating oil promotes the smooth sliding of the slider, reduces wear, avoids jamming or dry blockage, and suppresses the transmission path of structural noise between sliding components, making the overall system operation sound smoother and softer.

The invention discloses a long-service-life ball head assembly of an automobile. The long-service-life ball head assembly comprises a ball head seat, a sealing plate, a shaft rod, a ball head and a protective sleeve. The ball cup is arranged, the inner end of the ball cup is provided with a ball cavity, an oil injection hole, a blocking piece and other assemblies, the top end of the ball cup is connected with a set of shaft rods through a protective sleeve, the bottom ends of the shaft rods extend to the ball cavity and are connected with a set of balls, the outer sides of the balls are sleeved with a set of ball head sleeves, and the outer sides of the ball head sleeves are provided with oil storage grooves, through holes and other assemblies; lubricating oil can be injected into the oil storage groove through the oil injection hole, the ball head extrudes the ball head sleeve in the moving process, the lubricating oil flows into the ball head sleeve through the through hole, continuous lubrication between the ball head seat and the ball head is achieved, dry friction between the ball head seat and the ball head is avoided, abrasion is prevented, and the service life of the ball head seat is prolonged. And the protection effect on the connecting positions of the ball cup, the shaft rod and the ball can be enhanced through the protection sleeve of a double-layer structure, external invasion is isolated, and the service life of the ball assembly is prolonged.

This invention relates to the field of vibration reduction technology for electronic devices, and more particularly to a support device that combines vibration reduction and heat conduction functions. This support device supports a printed circuit board (PCB) and includes a flange piston, a fastening assembly, a fixing flange stud, an upper end cap, and a composite vibration damping pad. The upper end of the flange piston abuts against the bottom surface of the PCB, and the fastening assembly fixes the PCB to the upper end of the flange piston. The upper end cap is connected to a third cylinder of the fixing flange stud. The composite vibration damping pad is disposed within the cavity formed by the third cylinder and the upper end cap. The lower part of the flange piston is located within the upper end cap and can slide axially, with its lower end abutting against the composite vibration damping pad. The flange piston, fixing flange stud, and upper end cap are all made of thermally conductive metal. The composite vibration damping pad consists of a metal-rubber skeleton and thermally conductive silicone grease filling its pores. This invention achieves vibration reduction through the dry friction energy dissipation of the metal rubber and achieves efficient heat dissipation through the three-dimensional thermally conductive network formed by the metal skeleton and thermally conductive silicone grease, solving the problem of the mutual constraint between vibration reduction and heat dissipation.

The present application belongs to the technical field of excavating, and particularly relates to a front and rear frame hinging mechanism of a land leveler, a working method of the front and rear frame hinging mechanism and the land leveler. The front and rear frame hinging mechanism of the land leveler comprises a front frame and a rear frame, and a connecting position of the front frame and the rear frame is divided into a first connecting part and a second connecting part. A coaxial outer sleeve and an inner sleeve are arranged on an upper pin shaft. The outer sleeve is used for supporting a tapered roller bearing, and an oil passing hole is formed in an upper side wall of the outer sleeve. During rotation of the front frame, the front frame is adapted to push the inner sleeve downward to compress a supporting spring to open the oil passing hole through a push rod arranged thereon. The front and rear frame hinging mechanism of the land leveler is provided with the outer sleeve, the inner sleeve and the supporting spring, so that when the front frame rotates to a certain condition, the push rod on the front frame drives the inner sleeve to compress the supporting spring to open the oil passing hole, and dry friction between the inner sleeve and the upper pin shaft is avoided.

The application discloses a foil gas dynamic pressure bearing with outer surface sliding, which comprises a bearing sleeve (2) and a foil ring assembly arranged in the bearing sleeve. The foil ring assembly is composed of a plurality of elastic foils (1) which are sequentially jointed in the circumferential direction. Two adjacent elastic foils (1) in the circumferential direction are fixedly connected by welding at the jointing position, so that the foil ring assembly forms an integrated elastic ring structure. The outer surface of the foil ring assembly is in contact with the inner wall of the bearing sleeve (2), and when the foil ring assembly is loaded and deformed, the outer surface slides relative to the inner wall of the bearing sleeve in the circumferential direction to provide dry friction damping. One elastic foil (1) in the foil ring assembly is fixed to the bearing sleeve (2) to form an anti-rotation structure. The application shifts the friction interface to the outside without coating, fundamentally avoids the wear of the lubricating coating caused by the internal jointing sliding, significantly prolongs the service life of the bearing, and has excellent damping and lift-off characteristics.

The utility model belongs to the technical field of measuring devices, and particularly relates to a measuring device based on a linear module, which comprises a displacement assembly, a protective assembly arranged at the front end of the displacement assembly, and a lubricating assembly arranged at the inner end of the protective assembly, and solves the problems that when no protective lubricating device exists, the displacement assembly and the protective assembly are in direct dry friction, the friction coefficient is large, and the measuring precision is high. The problems that in the prior art, due to dry friction, the contact face of a guide rail and a sliding block is rapidly abraded, damage such as scratches and potholes can appear on the original smooth surface, the matching precision is reduced, the positioning accuracy of a sensor is affected in the measuring process, and then the measuring result deviates are solved, and a corrugated stretching pipe of a protection assembly is arranged in front of a displacement assembly; when the sliding table surface plate reciprocates according to tasks, the sliding table surface plate serves as a barrier to cover the displacement path, dust, chippings and other impurities are blocked, and lubricating operation is conducted in cooperation with the lubricating assembly.

The invention discloses a single-end-face mechanical seal auxiliary system with a dry friction prevention function, and belongs to the technical field of mechanical sealing.The auxiliary system comprises a base and a support arranged on the base, the support is provided with a lubricating liquid storage tank, lubricating liquid is stored in the lubricating liquid storage tank, the top of the lubricating liquid storage tank is a cavity, and the cavity is filled with gas; the lubricating liquid storage tank is connected with a liquid supplementing pipe and an exhaust pipe, one end of the liquid supplementing pipe is located below the liquid level of lubricating liquid in the lubricating liquid storage tank, and the other end is used for being connected with a pump. One end of the exhaust pipe is connected with the pump, and the other end is communicated with the cavity of the lubricating liquid storage tank; a liquid supplementing valve is arranged on the liquid supplementing pipe, and a one-way valve is arranged on the exhaust pipe. Automatic supply, real-time state monitoring, self-adaptive control and fault diagnosis of the lubricating liquid can be achieved, the mechanical seal dry friction phenomenon is effectively avoided, and the stability and reliability of system operation are improved.

The utility model relates to the technical field of splitting machines, in particular to an auxiliary device capable of being positioned and fixed for a splitting machine, which comprises a machine body, a mounting support and a lubricating device, the mounting support is mounted on the surface of the machine body, a foot support is fixedly connected to the lower surface of the mounting support, and a conveying mechanism is mounted on the upper surface of the mounting support. A positioning mechanism is mounted on the side surface of the machine body, and a lubricating device is mounted on the side surface of the mounting bracket; the lubricating device comprises a mounting plate, the surface of the mounting support is fixedly connected with the mounting plate, an oil storage tank is mounted on the upper surface of the mounting plate, and a tank cover is arranged on the upper surface of the oil storage tank. According to the utility model, by arranging the lubricating device, a lubricating film can be formed between moving parts, dry friction is converted into friction states such as liquid friction or boundary friction, and the friction force is obviously reduced, so that the service life of equipment is further prolonged, and the maintenance cost of the equipment is reduced.

The application provides an assembled staged viscoelastic-friction composite damper, belonging to the technical field of dampers, which comprises a viscoelastic damping unit, a self-resetting friction damping unit and an intermediate connecting plate, the viscoelastic damping unit and the self-resetting friction damping unit are arranged on the two sides of the intermediate connecting plate; the viscoelastic damping unit and the self-resetting friction damping unit each comprise two fixed plates and one movable plate, the fixed plates are connected to the intermediate connecting plate, and the movable plate is arranged between the two fixed plates; a plurality of viscoelastic material blocks are arranged between the fixed plate and the movable plate of the viscoelastic damping unit, and a plurality of friction plates are arranged between the fixed plate and the movable plate of the self-resetting friction damping unit; a plurality of SMA wires are further connected between the fixed plate and the movable plate of the self-resetting friction damping unit, and the SMA wires are used for limiting the displacement of the movable plate along the length direction of the fixed plate; the application can avoid invalid wear of the self-resetting friction damping unit and damage of the viscoelastic damping unit, and effectively dissipate energy and damp.

The utility model relates to turbocharger technical field, concretely relates to a turbocharger built -in oil tank oil supply system, including oil inlet flange, flange assembly, gasket and bearing shell, the inside of bearing shell is provided with a plurality of built -in oil tank oil inlet pipeline and bearing shell intercommunication, gasket sets up between flange assembly and bearing shell, flange assembly includes connecting flange, throttle orifice plate, check valve piece and baffle ring, the surface of connecting flange is provided with oil inlet pressure measurement passageway and a plurality of built -in oil tank pressure measurement passageway, throttle orifice plate sets up in the inside of oil inlet pressure measurement passageway, baffle ring sets up at the end face of throttle orifice plate, the both sides of connecting flange are provided with pressure measurement hole stopper, through the setting of above -mentioned structure, the problem of turbocharger emergency shutdown when built -in oil tank system prevents electric pump failure, the rotor and bearing between the dry friction under the condition of insufficient or broken oil of the reduced amount of sliding oil, lead to bearing and rotor burnout, turbocharger failure has been solved.

The utility model relates to the technical field of high-speed high-pressure water spraying or oil spraying screw compressors, and discloses a dry friction mechanical sealing device which comprises a bearing seat, a bearing piece installed in the bearing seat, a compressor sealing cavity arranged on one side of the bearing seat, and a mechanical sealing gland installed in the compressor sealing cavity. One side of the mechanical sealing gland is in threaded connection with two connecting screws, and one side of the mechanical sealing gland is fixedly connected with a dry friction mechanical sealing static ring. The dry friction mechanical sealing device is used for a high-speed and high-pressure water or oil spraying screw compressor and is fixed to a gland through a screw, a static ring is located in the gland, a movable ring assembly is connected with a shaft sleeve, the shaft sleeve is tightly pressed with a rotor shaft and a bearing piece, synchronous high-speed rotation is achieved, an oil circulation hole provides cooling lubrication, and a water circulation hole cools a sealing assembly, and a nitrogen control system is not needed. Medium gas is directly used for forming a gaseous film, and direct friction of the sealing face is prevented.

The application discloses a variable stiffness multi-piece foil gas dynamic pressure bearing, which comprises a bearing sleeve and a plurality of elastic foils arranged in the bearing sleeve. The elastic foils are arranged in a circumferential direction, and the cross section of the elastic foils is in a non-closed triangular structure and has a first side, a second side and a third side. The first side has a fixed end directly or indirectly fixed to the inner surface of the bearing sleeve, and the third side has a free end in contact with the inner surface of the bearing sleeve or a bottom foil. A top foil is arranged on the radially inner side of the elastic foil and supported on the first side. The application realizes multi-stage self-adaptive variable stiffness through the deformation of the elastic foils and the mutual contact of the circumferentially adjacent foils after being pressed, and the sliding of the free end generates dry friction damping. The application has low manufacturing cost and significantly improves the adaptability and running stability of the bearing under wide load working conditions.

The utility model discloses a support rod assembly and a ball socket piece thereof, the ball socket piece is provided with a ball head mounting hole and a shoulder part, the ball head mounting hole is used for mounting a ball head piece of the support rod assembly, and the shoulder part is arranged outside the ball head mounting hole; wherein an oil storage drainage groove is formed in the inner wall of the ball head mounting hole, and the width of the oil storage drainage groove is gradually increased in the direction towards the shoulder blocking part so as to guide the lubricating medium to the shoulder blocking part. The oil storage drainage groove is formed in the inner wall of the ball head mounting hole and plays a role in storing lubricating media, the lubricating state between the ball head part and the ball socket part is stably maintained for a long time, the current condition of frequent maintenance is improved, the condition of dry friction is improved, the service life of the supporting rod assembly is prolonged, and the service life of the supporting rod assembly is prolonged under the same working time. And the width of the oil storage drainage groove is gradually increased, so that the risk of corrosion of the ball head piece is reduced.

The invention discloses a piston rod pneumatic dustproof ring service life prediction method. The method comprises the following steps that a sensor group is installed in a piston rod sealing area; measuring the initial hardness of the dustproof ring, the surface roughness of the piston rod and the lip interference magnitude; piston rod displacement, air pressure fluctuation data, aerosol concentration, environment temperature and humidity and friction coefficient are collected in real time; calculating the real-time movement speed of the piston rod according to the displacement change rate; extracting pulsation main frequency and amplitude based on the air pressure fluctuation data; calculating dry friction wear force, air pressure pulsation damage amount and condensate water corrosion equivalent; the total damage degree is output by fusing multiple damage amounts; calculating a failure probability according to the aerosol concentration and the wear state; and predicting the remaining life based on the damage change rate. According to the method, through multi-sensor data fusion, dynamic damage modeling and nonlinear attenuation calculation, the problems that air pressure pulsation damage cannot be quantified, and the condensate water corrosion effect and the hardness attenuation influence are ignored are solved.

The invention discloses a 40Cr steel shaft sleeve surface strengthening method based on a QPQ technology. According to the method, after the 40Cr steel is quenched and tempered, the steps of soaking and cleaning, drying and preheating, salt bath nitriding, salt bath oxidation, follow-up polishing and the like are sequentially carried out, and QPQ composite treatment is achieved. A compact and uniform black oxidation film can be obtained on the surface of the shaft sleeve treated through the method, and the corrosion resistance of the shaft sleeve is remarkably improved. Test results show that the surface hardness of the shaft sleeve is improved by about 170%-210% compared with that of a base body, and the friction coefficient is reduced by about 40% under the dry friction condition. The technological process is relatively simple and convenient, workpiece deformation is small, and the method can serve as a favorable alternative scheme of a traditional chromium plating surface treatment mode.

The application relates to the technical field of liquid metal bearing and discloses a ball tube anode assembly with a liquid metal bearing, which comprises a bearing main shaft, a positioning step is fixedly installed on the outer circular surface of the bearing main shaft, a bearing sealing ring is sleeved with the outer circular surface of the positioning step, the bearing sealing ring is rotationally connected with the positioning step, a bearing anode sleeve and a bearing sleeve are sleeved with the bearing main shaft, liquid metal is filled in the gap between the bearing anode sleeve, the bearing sleeve and the bearing main shaft, the gap is matched with the refrigerant channel in the bearing main shaft, and the gap is actively pushed to the gap during shutdown by means of the pressure stabilizing compensation structure formed by the through hole, the groove, the piston and the spring, the liquid metal tension is maintained by centrifugal force after startup, the lubricated contact surface is ensured to be always filled, the problem of dry friction in the initial stage of the traditional bearing is avoided, the rotating resistance is obviously reduced, the running heat is quickly discharged, and the service life of the assembly is prolonged.

The invention relates to the technical field of double-support bearing seats, in particular to an oil slinger lubricated double-support bearing seat which comprises a split box body, end covers and a main shaft, the split box body comprises a base and an upper cover, the top end of the base is in butt joint with the upper cover in a sealed mode through bolts, and the left side and the right side of the split box body are in butt joint with the end covers through bolts. The positioning pins arranged on the two sides of the base are axially installed from the outer side, the polished rod parts of the positioning pins extend into the inner hole of the oil slinger, and an anti-disengaging mechanism is formed. The structure solves the problem that the oil slinger is easy to fall off from the annular groove of the shaft sleeve when equipment is lifted obliquely or dry friction is started; a safety gap is formed between the positioning pin and the inner hole wall of the oil slinger, the oil slinger is allowed to swing normally, meanwhile, it is ensured that the oil slinger can still be limited when swinging at the maximum angle, the problem that a positioning element cannot be installed due to the fact that the inner side space of a traditional split type box body is limited is solved, and the stability and safety of the bearing pedestal under the dynamic working condition are remarkably improved.

The present invention aims to provide a dry friction base material, a dry friction material, a torque limiter, and a fixing structure for a dry friction base material, which can ensure a stable friction coefficient. The dry friction base material 1 is fixed to the surface of a plate 6 for a torque limiter, and has a fixed shape portion 2 for fixation. The shape of the fixed shape portion is preferably concave, convex, or notched. Furthermore, the shape of the dry friction base material in plan view is preferably circular, elliptical, polygonal, or arcuate.

The utility model relates to the technical field of engine bearing bushes, and discloses a high-temperature-resistant self-lubricating engine bearing bush which comprises a bush body, a plurality of heat dissipation holes are formed in the outer portion of the bush body, a circulation oil groove is formed in the front end of the bush body, arc-shaped grooves are formed in the two sides of the front end of the bush body, and a plurality of oil storage grooves are formed in the two sides of the front end of the bush body. Extending blocks are fixedly connected to the upper end and the lower end of the tile body, limiting blocks are fixedly connected to the two sides of the tile body, a high-temperature-resistant assembly used for improving the strength is arranged in the tile body and comprises a reinforcing layer, and the outer portion of the reinforcing layer is fixedly connected to the inner wall of the tile body. According to the bearing bush, continuous supply of lubricating oil is further guaranteed through the arrangement of the arc-shaped groove and the multiple oil storage grooves, the continuity of lubrication is kept, the dry friction phenomenon is prevented, the service life of the bearing bush is prolonged through the design, and the operation efficiency and reliability of the whole engine are improved.

The application discloses a multi-form graphite-carbide steel-based multi-phase wear-resistant composite material and a preparation method and application thereof. The material has a composite structure of spherical graphite+three-dimensional coral-shaped graphite+various carbides+steel matrix, and the various carbides are M3C type carbides and MC type carbides. The method comprises core steps of component design, composite inoculant proportioning design, smelting and inoculation treatment and subsequent heat treatment, and the key lies in realizing the synergistic precipitation of spherical graphite, three-dimensional coral-shaped graphite and various types of multi-size carbides through chemical component design and inoculation regulation. The application also provides application of the material in high-impact, heavy-load or dry friction working conditions of crushing or grinding equipment. The material has better comprehensive wear resistance in complex working conditions, and has structural stability, impact resistance, lubricity and thermal stability, and has a wide engineering application prospect in harsh environments such as high impact, high load and dry friction.

This invention discloses a double-end-face self-cooling mechanical seal, relating to the field of centrifugal pumps. The device includes a cooling sleeve, a transmission fixing component, a lower static seal seat, an upper static seal seat, a lower static seal ring, an upper static seal ring, a lower static seal gland, an upper static seal gland, and two sets of clamping moving rings. The cooling sleeve is inserted into the centrifugal pump impeller shaft and is located at the end of the pump head. The transmission fixing component is located inside the cooling sleeve. The lower static seal seat is installed on the side of the cooling sleeve away from the pump head, and the upper static seal seat is installed on the side of the cooling sleeve closer to the pump head. The two sets of clamping moving rings are slidably connected to both sides of the transmission fixing component. Two sets of elastic elements are provided between the two sets of clamping moving rings and the transmission fixing component. This device uses double independent end-face seals to form a double barrier, preventing direct leakage of the medium to the environment; the integrated cooling sleeve allows the sealing components to be fully immersed and cooled, avoiding dry friction burning of the sealing surfaces; and the double-sided independent elastic pre-tightening achieves independent compensation for wear on the upper and lower sealing surfaces.