182 results about "Dry friction" patented technology

The invention belongs to the technical field of plunger sealing of high-pressure plunger pumps, and particularly relates to a high-pressure plunger pump plunger assembly self-compensation type abrasion-resistant sealing structure which comprises a high-pressure plunger pump body and an oil suction and outlet tank, the right end of the high-pressure plunger pump body is connected with the oil suction and outlet tank, and a fixing assembly is detachably installed at the right end of the interior of the high-pressure plunger pump body. And the right end of the fixing assembly communicates with the left end of the inner wall of the oil suction and outlet tank, a first sealing structure is detachably installed at the right end of the interior of the fixing assembly, and the high-pressure plunger pump main body is used for driving the first sealing structure to conduct fine opening and closing operation. The friction coefficient of the sealing structure is reduced, and the friction heat conductivity coefficient of the plunger assembly is reduced, so that the wear resistance of the sealing structure is improved, material aging caused by temperature rise is prevented, multiple times of self-compensation can be conducted on a wear gap, and then the durability of the sealing structure is greatly improved.

The invention discloses a polymorphic graphite-carbide steel-based multiphase wear-resistant composite material and a preparation method and application thereof.The material is of a composite tissue structure of spheroidal graphite, three-dimensional coralline graphite, multiple carbides and a steel matrix, and the multiple carbides are M3C type carbides and MC type carbides. Comprising the core steps of component design, composite inoculant proportion design, smelting and inoculation treatment, subsequent heat treatment and the like, and is characterized in that synergistic precipitation of spheroidal graphite, three-dimensional coralline graphite and various and multi-size carbides is achieved through chemical component design and inoculation regulation and control; the invention further provides application of the material in high-impact, heavy-load or dry-friction working conditions of crushing or grinding equipment. The material provided by the invention has better comprehensive wear resistance under complex working conditions, has structural stability, impact resistance, lubricity and thermal stability, and has wide engineering application prospects in severe environments such as high impact, high load, dry friction and the like.

The utility model relates to the technical field of track lubrication, and discloses a lubricating track assembly which comprises a supporting piece, a driven wheel rotationally installed on one side of the supporting piece through a rotating shaft, a driving wheel rotationally installed on the other side of the supporting piece through a bearing, and a tooth block fixed to the surface of the driving wheel. By arranging a hollow oil guide plate, a wear-resistant contact piece and a second through hole, lubricating oil can be smeared on the surface of a tooth block of the driving wheel through the second through hole when the driving wheel rotates and drives the tooth block to rotate to pass through one side of the hollow oil guide plate; when the tooth block passes through one side of the wear-resistant contact piece, lubricating oil smeared on the surface of the tooth block is uniformly smeared on the surface of the crawler belt through the wear-resistant contact piece, and redundant lubricating oil is scraped off and is reserved on the surface of the second through hole, so that the surface of the driving wheel tooth block is lubricated; the problem that due to dry friction, the tooth blocks of the driving wheel can be greatly abraded after being used for a long time, and the tooth blocks are damaged is solved, the service life of the tooth blocks is relatively long, and the use cost is relatively reduced.

The invention relates to the technical field of hydraulic element testing, in particular to a high-pressure axial plunger pump bearing bush pair interface friction and oil film characteristic testing device. According to the device, 10-60 MPa adjustable oil pressure is provided through the hydraulic pipeline unit, the driving unit achieves power loading and friction monitoring through a servo motor and a torque sensor, the main body unit conveys high-pressure oil to a bearing bush contact face through an in-shaft cross-shaped oil duct structure to form a static pressure supporting oil film, and a micron-sized oil film sensor is integrated; the oil detection unit monitors oil parameters, and the signal acquisition and control unit performs closed-loop regulation on oil supply flow, motor rotating speed and swash plate load based on oil film thickness, torque and pressure signals. The method has the beneficial effects that 0.2 mu m-level oil film fracture identification is realized, the occurrence rate of dry friction is reduced by 82% through a cross-shaped oil duct in the shaft, and the oil film fluctuation rate lt is cooperatively controlled through multiple parameters; + / -3%, the safety interlocking mechanism responds abnormally within 0.3 s.

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 provides a new energy heavy truck battery replacement collet locking structure, and belongs to the technical field of vehicle equipment, the new energy heavy truck battery replacement collet locking structure comprises a base, the base is fixedly connected with a plurality of shell assemblies, the shell assemblies are connected with driving assemblies, the new energy heavy truck battery replacement collet locking structure further comprises a locking assembly, and the locking assembly is used for fixing a battery box; the guide assembly is used for ensuring the movement stability of the locking assembly; the guide assembly has the beneficial effects that a double-positioning mechanism is formed through sliding fit of the sliding groove hole and the guide seat and embedded limiting of the guide plate and the guide groove, it is ensured that the telescopic track of the locking pin is accurate, deviation caused by vibration is avoided, and deformation of the locking component is prevented; the piston push plate is driven by means of movement of the locking assembly, so that lubricating grease is automatically released, full-range coverage is achieved through the flow guide groove and the containing groove, part loss caused by dry friction is reduced, and the service life is prolonged.

The invention discloses a novel nonlinear rubber steel wire rope composite vibration isolator, and relates to the field of vibration isolators, the novel nonlinear rubber steel wire rope composite vibration isolator comprises a lower clamping plate, an upper clamping plate, rubber and two groups of first steel wire ropes, and the tops and the bottoms of the two groups of first steel wire ropes are symmetrically mounted on the two sides of the upper clamping plate and the lower clamping plate; a gap is reserved between the rubber and the upper clamping plate. According to the novel non-linear rubber steel wire rope composite vibration isolator, when the amplitude of a crystal oscillator is small, vibration energy can be absorbed and dissipated through dry friction damping between the first steel wire ropes, the lower clamping plate, the first steel wire ropes, rubber and the upper clamping plate can generate large dynamic displacement, strong impact can be attenuated, and the vibration isolation effect is good. Meanwhile, a large amount of low-frequency and high-frequency vibration is absorbed and dissipated, and due to the fact that a steel wire rope vibration isolator is small in friction damping and poor in vibration isolation effect during resonance, under the large-amplitude condition, the overall elastic support can be enhanced through the arranged rubber.

The invention relates to a mechanical sealing structure for a high-pressure pump, which is applied to the field of mechanical sealing for pumps and comprises a pump shell, a push spring is mounted in the pump shell, a push ring is connected to the tail end of the push spring, a movable ring is connected to the surface of the push ring, a static ring is mounted in the pump shell, and a plurality of strip-shaped grooves are formed in the surface of the movable ring. An adjusting assembly is mounted in the strip-shaped groove and comprises a telescopic cylinder, a movable part is slidably connected to the inner bottom wall of the telescopic cylinder, a wedge-shaped block is fixed to the inner wall of one end of the strip-shaped groove, an adjusting groove is formed in the surface of the movable part, a sliding block is slidably connected to the interior of the adjusting groove, and a power assembly is mounted on the side, close to the top end, of the movable part; the problem of dry friction of a traditional mechanical seal in the low-speed starting stage is effectively solved through a dynamic adjusting mechanism composed of the adjusting assembly and the power assembly, the balancing weight can be separated from the wedge-shaped block through the first micro electric push rod, and therefore the leakage situation caused by the too thick liquid film is reduced.

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 belongs to the technical field of rail vehicle engineering, and discloses a simulation calculation method for accurately calculating train dynamic curve passing, which comprises the following steps of: establishing a longitudinal-transverse-vertical interaction heavy haul train-rail three-dimensional coupling dynamics refined model; nonlinear links (such as axle box suspension nonlinearity, center plate contact nonlinearity, wedge friction nonlinearity, coupler gap impact effect and dry friction nonlinearity, buffer nonlinear hysteresis impedance and the like) of locomotive suspension and the multi-parameter continuous change characteristic of a curve track are fully considered. If the coupler is used as an independent rigid part for modeling, analyzing the actual coupling and vibration characteristics of the coupler; in combination with the gas flow theory, an air braking model is further improved, and the influence of a train marshalling form on braking wave distribution and braking wave transmission, the influence of distribution of braking force and brake shoe pressure in the braking process on the vehicle wheel-rail power effect and the like can be considered.

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 relates to the technical field of oiling devices, in particular to an unpowered permanent magnet automatic oiling device which comprises an oil storage mechanism used for storing lubricating grease and an oil outlet mechanism. The oil storage mechanism comprises an oil storage barrel and a sealing partition plate fixedly arranged on the inner wall of the oil storage barrel, the bottom end of the oil storage barrel is of a funnel-shaped structure, an oil outlet pipe is arranged at the bottom end of the oil storage barrel, and an oil conveying hose is arranged at the bottom end of the oil outlet pipe; the oil outlet mechanism comprises a fixed magnetic ring fixedly arranged on the outer surface of the bottom end of the oil storage barrel and a movable magnetic ring arranged on the outer surface of the oil storage barrel in a sliding mode. By arranging the oil storage mechanism and the oil outlet mechanism, the device can utilize magnetic attraction to drive and control slow displacement of the strong magnetic piston, continuous and uniform injection of lubricating grease is achieved, excessive lubrication or dry friction is avoided, a power source or an air source is not needed, and the device is suitable for occasions where electricity is inconvenient or space is limited and is compact in structure, few in parts, convenient to install and maintain and low in cost. The method is suitable for batch deployment.

The present invention provides a cycloid wheel structure and a reducer including the same, which relates to the technical field of reducers and solves the technical problems of abnormal wear and high noise caused by the axial adhesion of two cycloid wheel bodies. The cycloid wheel structure includes a first cycloid wheel piece and a second cycloid wheel piece with two identical structures; the first cycloid wheel piece or the second cycloid wheel piece includes a cycloid wheel body and an anti-sticking component provided on the cycloid wheel body, and the distance between the two cycloid wheel pieces is maintained by the anti-sticking component; the anti-sticking component includes a magnetic part, and the magnetic part includes a magnetic ring and a fan-shaped magnetic block. The two cycloid wheel pieces of the present invention cannot be adhered together under the action of magnetic force, and the friction resistance during operation is eliminated. At the same time, the gap between the two cycloid wheel pieces is greatly increased, and lubrication is more sufficient, which effectively improves the problems of dry friction, noise and abnormal wear between the two cycloid wheel pieces.

The utility model discloses a copper bush structure used in a brush cutter gear box, which comprises a gear box assembly, a driving gear shaft and a driven gear shaft, the driving gear shaft is rotatably connected in the gear box assembly, a copper bush is arranged in the gear box assembly, the driven gear shaft is rotatably connected in the copper bush, and the driving gear shaft and the driven gear shaft are rotatably connected in the copper bush. Oil grooves are uniformly distributed in the inner diameter of the copper sleeve; the utility model has a simple structure, and solves the problem of dry friction heating under the condition of insufficient oil supply.

The invention discloses an abrasion test device for exploring a rubber material, and belongs to the technical field of rubber material abrasion detection, the abrasion test device comprises a detection table for a rubber sealing ring abrasion test, the detection table is provided with a contrast test mechanism for rubber sealing ring test simulation, and the contrast test mechanism is composed of an offset abrasion assembly and a sealing adjustment assembly. And an abrasion testing mechanism for detecting the abrasion loss of the rubber sealing ring is arranged on the detection table. By arranging the contrast test mechanism, single-factor simulation and double-factor coupling simulation can be formed, under the single-factor simulation, whether dry friction, oil lubrication friction and offset friction of the sealing ring can be tested in a contrast manner, and under the double-factor coupling, the friction of the sealing ring can be tested in a contrast manner. The complex and common actual working condition of oil lubrication and offset can be accurately simulated, the abrasion behavior under the combined action of lubricating oil and installation offset is studied, and the authenticity and comprehensiveness of the test are greatly improved.

The present invention belongs to the technical field of aircraft engine structural layout design, and specifically relates to a multi-support shared load-bearing structure between turbine stages with high vibration isolation, including a shared bearing seat and a broadband vibration reduction structure. The shared bearing seat is in the shape of a "human", including a bearing seat body, a front support arm and a rear support arm. The end of the front support arm away from the bearing seat body is connected to the front support rotation structure, and the end of the rear support arm away from the bearing seat body is connected to the rear support rotation structure; the broadband vibration reduction structure is combined and connected between the shared bearing seat and the turbine interstage casing. In the case where the excitation energy input cannot be reduced, the present invention improves the overall vibration isolation of the load-bearing structure by optimizing the configuration, setting elastic supports and dry friction energy dissipation structures, and reduces the vibration response level of the shared load-bearing structure between the stages during transmission to the outer casing of the aircraft engine, so as to prevent structural damage.

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.