1125 results about "Friction loss" patented technology

The invention relates to the technical field of intelligent oil injection control, in particular to a limited slip differential gear oil performance directional optimization method and system.The limited slip differential gear oil performance directional optimization method comprises the following steps that the temperature rise rate is collected through a temperature sensor to calculate the gear shaft elongation, and a meshing clearance trend vector is generated by combining differential temperature time sequence analysis; the stability correction is calculated by fusing oil film thickness data, the injection angle compensation driving servo motor is solved based on vector projection, the adhesion factor index is constructed by coupling the oil injection feedback and the oil film difference, the oil product meeting the tension condition is switched when the limit is exceeded, and the lubrication recovery performance is evaluated. According to the method, gear shaft temperature rise and differential mechanism temperature gradient data are collected in real time, meshing clearance accurate prediction is achieved by combining expansion coefficient analysis, stability judgment is improved by fusing oil film thickness data, jet precision is optimized based on a vector projection dynamic compensation jet angle, and an adhesion factor index containing a phase difference is constructed to achieve lubrication attenuation early warning. And oil products are accurately switched by dynamically matching tension and viscosity threshold values, so that friction loss is reduced.

According to the free wheel type antiskid differential mechanism, a half axle gear 3 is meshed with a first planetary gear 4, the first planetary gear 4 is meshed with a second planetary gear 5, and therefore when the first planetary gear 4 and the second planetary gear 5 do not revolve, the half axle gear 3 rotates, the rotating direction of the second planetary gear 5 is the same as that of the half axle gear 3, and the second planetary gear 5 is meshed with an inner gear ring 6; the inner gear ring 6 is fixedly connected with the outer gear ring 7, so that the rotation direction of the outer gear ring 7 is the same as that of the half axle gear 3, and the outer gear ring 7 and the half axle gear 3 are jointly meshed with a free gear, so that a structure with a zero arm of force is formed; if the half shaft on one side is not stressed due to slipping or suspension of the vehicle, the planetary gears 4 and 5 of the half shaft on the stressed side revolve to enable the outer gear ring 7 to rotate, the outer gear ring 7 and the half shaft gear 3 are in a locking state due to the fact that the force arm is zero, then escaping is achieved, instant response in the whole process is not delayed, and the service life of the vehicle is prolonged. Due to the fact that the force arm is zero in locking, friction loss is not generated, the pure mechanical structure supports large torque, and the device can be applied to various scenes such as off-road vehicles and heavy trucks.

The invention relates to the technical field of bearings, and discloses a ceramic angular contact ball bearing with high bearing capacity, the ceramic angular contact ball bearing comprises an outer ring, an inner ring, a rolling body, a retainer and an oil storage cavity, the outer ring is of a cylindrical structure, and the inner surface of the outer ring is in contact with the rolling body; the inner ring is positioned inside the outer ring, and the outer surface of the inner ring is contacted with the rolling body; and the rolling bodies are a plurality of spherical ceramic elements which are fixed and separated by the retainer. By optimizing the arrangement mode and material selection of the rolling bodies, the bearing has higher bearing capacity and anti-overturning performance under the high-load condition; the heat dissipation through holes are formed in the retainer, so that the heat dissipation performance of the bearing in the running process is remarkably improved, and the bearing failure risk caused by overheating is reduced; through the design of the oil storage cavity and the oil outlet micropores matched with the oil storage cavity, uniform supply of lubricating oil is achieved, and friction loss between the rolling body and the inner ring and the outer ring is reduced.

To provide an engaging clutch that has a simple structure and can be made compact and long-life while reducing friction loss and preventing noise generation.SOLUTION: A selectable clutch 100 comprising a selector 150 is so constituted that: a support groove part 111 is formed at one of an inner ring 110 and an outer ring 120 and a pocket part 112 is formed at the other; an elastic member 150 is provided to energize a roller 130 arranged between the inner ring 110 and the outer ring 120 toward the pocket part 112; a roller retaining surface 112 of the support groove part 111 and a roller retaining surface 122 of the pocket part 112 are formed at an inclination angle in which a load placed on the pocket part 125 acts on the roller 130 when the roller 130 is held therebetween; and the roller 130 is retained by the support groove part 111, the pocket part 112 and the selector 150 in a locked state.SELECTED DRAWING: Figure 1

The utility model provides an on-line rotary viscometer, which belongs to the technical field of viscosity measuring instruments and comprises a measuring chamber, a rotor, a stator, a driving component and a detecting piece, and the measuring chamber is suitable for being communicated with a pipeline to be measured; the rotor is arranged in the measuring chamber, the rotor is of a cylinder structure with a cavity inside, and a plurality of liquid inlet grooves communicated with the cavity are formed in the side wall of the rotor; the stator is rotatably arranged in the cavity, and a medium channel is arranged between the stator and the rotor; the driving assembly is connected with the rotor, a medium flowing through the medium channel can rotate around the stator under the rotating action of the rotor, and the rotating medium can drive the stator to rotate or drive the stator to generate a rotating trend; the detection piece detects the viscous torque borne by the stator during rotation. According to the online rotary viscometer provided by the utility model, the rotation of the stator is driven by a medium without friction loss caused by a transmission process, so that the viscous torque during the rotation of the stator is accurately obtained, and the accuracy of a result is improved.

The invention relates to the technical field of speed reducers, in particular to a multi-stage coaxial speed reducer which comprises an outer cylinder, a first-stage gear ring and a second / third-stage gear ring are arranged in the outer cylinder, and a first-stage speed reducer, a second-stage speed reducer and a third-stage speed reducer are sequentially arranged in the outer cylinder. The first-stage planet carrier framework is axially fixed, and the second-stage planet carrier framework and the third-stage planet carrier framework axially float; gaskets / thrust bearings are arranged between stages to achieve axial supporting and friction reduction, and the last-stage three-stage planet gears adopt staggered-tooth gears to eliminate meshing clearances. Through the coaxial compact integrated design, the large reduction ratio and the compact structure are both considered; due to the lubricating circulation design of inter-stage antifriction supporting and self-adaptive rotating speed, the friction loss is greatly reduced, and the transmission efficiency is improved; the structure of staggered tooth clearance eliminating, elastic buffering and shaft system stabilizing effectively reduces gear abrasion and impact loads, remarkably prolongs the service life, has the advantages of being high in transmission precision, fast in response and stable in operation, and can be used for precise transmission, automobile active stabilizer bars and other scenes.

An energy-saving rolling support and radial symmetric hydraulic cylinder drum type intelligent braking structure of a screw press comprises a motor, the motor is fixed to an upper cross beam, an output shaft of the motor is connected with a gear, the gear is meshed with an outer ring gear on a flywheel, the flywheel and a first screw are connected and rotate together, and the top of the first screw is tensioned through a first nut; hydraulic cylinders are symmetrically arranged above the upper cross beam in the radial direction, hydraulic oil enters cavities of the hydraulic cylinders through oil conveying pipelines on the upper cross beam, advancing and retreating of piston push rods are achieved, drum brakes are installed on the front portions of the piston push rods, friction plates are symmetrically arranged on the end faces of the drum brakes, and when the piston push rods are ejected out, the friction plates make contact with the lower end faces of flywheels. Therefore, the braking of the screw rod mechanism is realized; according to the invention, the space is saved, and the braking sensitivity is improved; the friction loss of the screw press in the operation process is reduced, and the energy utilization rate is increased.

The invention provides a steel wire rope winding device, which belongs to the technical field of winch winding equipment and comprises an operating frame, the operating frame is connected with a guide wheel, an electric cabinet and a supporting flange plate, the supporting flange plate is connected with a rotary supporting plate and a variable-frequency speed reducer, and the upper end of the supporting flange plate is provided with a driven fluted disc, a rotary disc and a winding frame. The variable-frequency speed reducer is connected with a driving fluted disc, and the guide assembly comprises a locking mechanism and a protection mechanism; the steel wire rope winding device has the beneficial effects that the winding position of a steel wire rope can be changed through the motor, the lead screw and the guide frame, uniform arrangement is achieved, the winding quality is guaranteed, the torsion condition can be reduced through the clamping and guiding effects of the guide wheel, meanwhile, protective liquid can be smeared on the surface of the steel wire rope through the liquid suction column to reduce friction loss, and when the steel wire rope is clamped, the steel wire rope is prevented from falling off. And winding can be automatically stopped, the steel wire rope can be locked, an operator can be reminded in time, and therefore equipment damage or safety accidents are reduced.

The invention discloses a three-coordinate measuring machine re-measurement system and a control method, and belongs to the technical field of three-coordinate measurement, the three-coordinate measuring machine re-measurement system comprises a support, a workbench, a portal frame, a detection system, a first electric telescopic rod, a second electric telescopic rod, a third electric telescopic rod, a sliding rail, an adjusting column and a gradienter, and further comprises a main control module and a control logic module, the control logic module controls the three-coordinate measuring machine to execute a measuring task through electric connection, ceramic shells are arranged on the surfaces of the portal frame, the connecting frame, the sliding clamping block and the sliding rail, and the characteristics of high rigidity and low expansion coefficient of ceramic materials are utilized, so that deformation of a traditional metal structure caused by temperature change or long-term friction is avoided. Friction loss is reduced while the contact area is reduced, and the track precision when the portal frame translates along the X axis is ensured. The rigid support of the ceramic shell enables the equipment not to depend on a strict constant temperature environment, eliminates a thermal deformation error source from the mechanical structure level, and improves the measurement stability in a complex environment.

The invention discloses a rapid positioning injection mold and a using method thereof.The rapid positioning injection mold comprises a lower mold fixedly installed on a fixed plane, and an upper mold is correspondingly arranged over the lower mold; the positioning holes are formed in the left side and the right side of the upper mold in a penetrating manner; the buffer spring is fixedly arranged between the lower part of the lower die and the platform; the water cooling pipeline is fixedly mounted in the lower mold in a penetrating manner; and the water cooling pipeline is fixedly mounted in the lower mold in a penetrating manner. According to the rapid positioning injection mold and the using method thereof, in the using process of the rapid positioning injection mold, the mold is cooled through a water cooling pipeline, liquid in the water cooling pipeline is cooled through cooling oil when used, and the cooling oil with the temperature rising after heat exchange is conveyed into a heating copper pipe to heat an injection molding channel; and meanwhile, positioning is conducted through expansion of the positioning air bags distributed in a central symmetry mode, and positioning deviation caused by gaps due to friction loss is reduced.

The utility model discloses a gas dynamic pressure radial bearing based on a tenon biological structure, and relates to the technical field of radial dynamic pressure gas bearings. Comprising a bearing rotor and a bearing sleeve, grooves are formed in the peripheral surface of the bearing rotor, the grooves are distributed in the cylindrical spiral line direction, the grooves are distributed in the circumferential direction of the bearing rotor at intervals to form a groove set, a zone area is formed between any two adjacent grooves, the section of the zone area is in a streamline shape, and the bearing rotor is arranged in the bearing sleeve. And in a non-working state, the table area is in contact with the inner wall of the bearing sleeve, and in a working state, gas outside the bearing can flow into the bearing sleeve from the gap, and a gas film with high internal pressure is formed in the middle of the bearing sleeve. According to the aerodynamic radial bearing based on the tenon biological structure, the bearing capacity of the bearing is enhanced, the stability of the bearing is improved, the friction loss in the bearing is reduced, the service life of the bearing is prolonged, and the stability of the bearing is improved.

The invention discloses a V-shaped thrust retainer which comprises an annular main body, and the annular main body is provided with pockets for mounting a rotating body; the pocket is provided with a V-shaped limiting part for limiting the rotation body to move in the axial direction of the pocket; the annular body is further provided with an outer oil storage part for containing lubricating oil, a buffering part and a buffering ring, the buffering part is arranged between every two adjacent pockets, an oil storage cavity is formed in each buffering part, and the buffering ring is arranged on the side wall of the inner ring of the annular body. Compared with a traditional arc-shaped / annular flange and other structures, the V-shaped limiting part can reduce the contact area of the rotating part and the limiting structure, friction loss is reduced, and lubricating oil consumption is reduced; by arranging the buffering part, the buffering layer can play a role in absorbing and damping, so that the rolling path of the rotating body can be kept stable, collision impact and vibration generated in the rolling process are further reduced through the stability of the rotating body, and finally the damping and noise reduction effects of the retainer and the bearing are achieved.

The invention relates to the technical field of part stamping dies, in particular to an automobile part machining stamping forming die which comprises a mounting plate, a fixed supporting structure is arranged below the mounting plate, a first mounting block is fixedly mounted on the upper side of the mounting plate, and a detachable lower die base is arranged on the upper side of the first mounting block. In the process that a sliding block moves downwards along with a movable adaptive block, the top face of the sliding block retracts into a first sliding cavity, space is reserved for stamping, when stamping is completed and an upper die block ascends, a second spring pushes the movable adaptive block to move upwards, the top of the sliding block protrudes out of the surface of a lower die base to eject a workpiece, and the top of the sliding block makes contact with an extrusion sensor to trigger an automatic oil injection pump; lubricating oil is injected into the oil injection hole through the guide pipe and sprayed to the surface of the lower die base through the oil injection groove to complete lubrication of the lower surface, the bidirectional lubrication mechanism ensures that the metal sheet is comprehensively lubricated in the stamping process, friction loss is remarkably reduced, and the product surface quality is improved.

The present disclosure discloses a linear motor module, including a mounting base, a magnet mounting seat arranged on the mounting base, three stators arranged on the magnet mounting seat and composed of array-structured permanent magnet assemblies, linear guide rails arranged on the mounting seat, sliding blocks mounted on the linear guide rails, a moving plate arranged on the sliding blocks, and three inductors arranged on the moving plate and corresponding to the stators. The magnet mounting seat has three mounting surfaces; the three stators are separately located on the three mounting surfaces; the three inductors are arranged in a one-to-one correspondence to the three stators; and an angle between two adjacent stators is 60 degrees. The linear motor module of the present disclosure is reasonable in structural design. The angle between two adjacent stators is 60 degrees, so that a normal attracting force between the stator and the inductor on each surface can be compensated for each other, and a vector sum of the normal attracting forces tends to be zero. Therefore, the normal attracting force caused therefrom and a load and friction loss on the linear guide rails can all be significantly reduced.

The invention relates to a wheel and paddle coaxial amphibious robot and a using method thereof, and belongs to the technical field of robot aircrafts. Comprising a fuselage, four deformation modules, connecting rods and an air-ground execution mechanism, the four deformation modules are evenly arranged on the fuselage, the deformation modules are connected with the air-ground execution mechanism through the connecting rods, and the deformation modules are used for controlling position change of the air-ground execution mechanism, so that conversion between a land mode and an unmanned aerial vehicle mode is achieved. The coaxial design that the wheel motor directly drives the wheel is adopted, compared with other gear transmission and synchronous belt transmission for driving the wheel, errors and friction loss caused by transmission are avoided, and meanwhile the situation that the mass is reduced due to the use of a bearing is avoided; the design of the channel in the center of the sleeve further provides convenience for line arrangement of the blade motor, and the problem of line winding is effectively solved through the fixing mode of the blade motor base.

The invention relates to a water pump scheduling method for estimating lift based on data driving, which comprises the following steps: calling structural information and sensing data, calculating friction loss and structural symmetry, extracting differential pressure data flow gradient, judging load matching degree, activating path nodes, identifying differential pressure data change sections, and mapping a calculation path. According to the method, dynamic correction and compensation of input parameters are achieved by means of conjoint analysis of the structural features of the water inlet and the water outlet and flow pressure difference data, and comprehensive judgment of the working condition matching degree and the periodic change state is combined, so that the flow resistance trend is judged, and the calculation result is corrected. The adaptability to cold load fluctuation and loop temperature difference change is enhanced, the response capability of lift calculation to water body characteristic change is improved by introducing flow resistance trend and viscous state factors, and the calculation stability of the model in different operation sections and the calculation accuracy of the model in complex working conditions are optimized by using a path activation configuration and output switching mechanism.

The invention discloses a metrological verification method and system for a fuel dispenser, particularly relates to the technical field of metrological verification, and is used for solving the problem that the fuel gasification effect influences the metering precision under the existing high flow rate condition. The influence of the friction effect of the contact area of the inner wall of the pipeline and fuel oil on local heat accumulation is analyzed and evaluated through micro-scale friction loss, and the area where shear stress is abnormally increased is monitored and marked through shear stress change, so that a gasification high-risk area is determined; for the gasification high-risk area, the change rate of Van der Waals force among fuel molecules is monitored, and the sudden change process of the Van der Waals force is analyzed; monitoring the energy dissipation rate of the turbulent vortex, and identifying the abrupt change point of the energy dissipation rate so as to evaluate the gasification occurrence probability of the local area; and the dramatic change degree of the intermolecular interaction force and the gasification occurrence probability are comprehensively evaluated, the influence degree of the gasification effect on the fuel oil metering precision is determined, and then metrological verification of the oiling machine is optimized.

The utility model discloses a balance wheel matching support structure for logistics sorting, which comprises a base frame, driving gears for driving a module belt to move are arranged at two ends of the base frame, the module belt is connected between the driving gears at two ends, a balance wheel group is mounted at the bottom of the module belt on the base frame, and the balance wheel group is connected with the module belt. A mounting cross beam is arranged on one side of the balance wheel set, a plurality of wear-resistant supporting rails are arranged between the mounting cross beam and the module belt, and the wear-resistant supporting rails extend in the moving direction of the module belt; the wear-resistant supporting track is arranged in the middle section of the module belt and plays an effective supporting role, so that the conveying surface of the module belt is smooth, the conveying stability of the module belt is improved, meanwhile, the module belt is prevented from making contact with the balance wheel set, unnecessary friction loss is avoided, and the service life of the module belt and the balance wheel set is prolonged.

The utility model discloses a plastic oil self-lubricating maintenance-free axle bearing which comprises an outer ring, a rolling body, an inner ring and plastic oil, the rolling body is arranged between the inner ring and the outer ring, the plastic oil is in contact with the rolling body and is used for lubricating the rolling body, the utility model provides the novel self-lubricating maintenance-free axle bearing, and the plastic oil formed by an oil-saturated polymer matrix is used as a lubricating medium of the axle bearing; the lubricating oil can stably run in high-load, high-dust, high-temperature and low-temperature environments, and a lubricating film is autonomously formed in the running process, so that the maintenance frequency is reduced, the friction loss is reduced, the wear resistance is enhanced, and even the lubricating oil is maintenance-free. And the solid plastic oil is not easy to leak, so that the risk of environmental pollution is reduced.

Systems and methods of the present disclosure include receiving measured data corresponding to a wellbore and locating the measured data in a flow map corresponding to the wellbore. The method also includes converting the measured data to determine friction loss and comparing the located measured data and the determined friction loss. Moreover, the method also includes determining that the located measured data is consistent with the determined friction loss with a common flow regime and deeming the common flow regime as a current flow regime. Furthermore, the method includes controlling an operation in the wellbore based at least in part on the deemed current flow regime.

According to the composite continuum mechanical arm control method and system and the mechanical arm, friction loss is considered, the drive wire node tension transmission relation is analyzed, drive wire tension distribution is obtained, and then deformation drive of a flexible beam is equivalent; statics analysis is carried out on the notch continuum mechanical arm, a static model is established by using an Euler-Bernoulli beam theory, and the static model is solved by using a Taylor series expansion method; based on static model data, a Kepler elliptic equation is used for fitting the tail end track of the notch continuum mechanical arm, and a relation equation of the concentric tube continuum mechanical arm relative to the tail end coordinates is constructed; and according to matrix coordinate conversion, an equation of key parameters needed for solving the control parameters is established and iteratively solved, and a control parameter equation set is established to solve the control parameters of the composite continuum mechanical arm. The control response timeliness can be improved, and the control accuracy and precision can be improved.

The invention discloses a drilling fluid flow calculation method for gas lift reverse circulation drilling. The drilling fluid flow calculation method comprises the following steps: S1, defining a gas lift reverse circulation lifting force and friction loss pressure model; s2, assuming that the drilling fluid flow in the circulation process is Qm; s3, calculating the total friction pressure of gas lift reverse circulation; s4, calculating the gas lift reverse circulation lifting force; and S5, according to the gas-lift reverse circulation lifting force and the gas-lift reverse circulation total friction force, the upward backflow amount of the drilling fluid is calculated. According to the invention, by inputting the gas lift reverse circulation well depth structure and the drilling related parameters, the influence of the gas lift reverse circulation well depth structure and the drilling related parameters on the backflow amount of the drilling fluid is researched, so that the optimal operation parameters of the optimal gas lift reverse circulation are obtained. According to the method, parameters of the air compressor air supply amount, the double-wall drill rod tripping-in depth, the double-wall drill rod specification and the single-wall drill rod specification selected for drilling of the gas lift reverse circulation geothermal well drilling can be optimized, and a reasonable theoretical basis is provided for more reasonably achieving gas lift reverse circulation drilling.

The invention discloses an RV speed reducer and an industrial robot, and relates to the technical field of speed reducers. The RV speed reducer comprises a pin wheel housing, a planet carrier and a main bearing; the main bearing is used for supporting relative movement of the planet carrier and the pin wheel housing, the main bearing comprises an inner ring, an outer ring and a rolling body clamped between the inner ring and the outer ring, the inner ring is formed on the planet carrier, the outer ring is fixedly connected with the pin wheel housing, the outer ring is provided with a track, and the track comprises an arc-shaped section; wherein the outer diameter phi 3 of the outer ring, the bottom diameter phi 2 of the track, the radius R of the arc-shaped section and the diameter S of the rolling body meet the following conditions: (S * 1.015) / 2 < = R < = (S * 1.025) / 2, and (phi 2 + 4.6 mm) < = phi 3 < = (phi 2 + 6 mm). By reasonably limiting the sizes of the track and the outer ring, the deformation of the track is controlled, the friction loss is reduced and the service life of the main bearing is prolonged while the main bearing is simple to assemble and low in production cost.

The application discloses a permanent magnet motor, which comprises a stator and a rotor, the rotor is arranged at the inner circumferential side of the stator, the rotor comprises a rotor house and a plurality of magnetic pole modules, the plurality of magnetic pole modules are arranged at the outer circumferential side of the rotor house along the circumferential direction of the rotor house, and the gap between adjacent magnetic pole modules extends outwardly and obliquely from the outer wall of the rotor house in the direction away from the rotation direction of the rotor house. In the application, the air in the driving gap flows outward during the rotation of the permanent magnet motor, the air in the air gap between the driving stator and the rotor flows, the permanent magnet motor is cooled, the air flow resistance and the wind friction loss are reduced, the heat dissipation of the permanent magnet motor is enhanced, in addition, the resistance during the rotation of the rotor is reduced, the mechanical loss of the rotor is reduced, and the efficiency of the permanent magnet motor is improved.

The invention discloses a composite lubricating material for well drilling. The composite lubricating material comprises a core layer, a protective shell layer, a phase change layer and a smooth shell layer which are sequentially wrapped from inside to outside to form micron-sized spheres, the core layer is a liquid lubricant, the protective shell layer is an inorganic protective shell layer, the phase change layer is prepared from a solid-liquid conversion phase change material, and the smooth shell layer is prepared from an inert material. By utilizing the four-layer structure of the composite lubricating material for well drilling, the composite lubricating material can be attached to a key part with serious friction loss in a fixed point manner to play a lubricating role, and can maintain low foaming property and high lubricating property after repeatedly entering an underground high-temperature environment, so that technical support is provided for well drilling construction operation.

The utility model relates to the technical field of steel pipe necking, in particular to a steel pipe necking device. The necking device comprises a first shell, a second shell, a necking assembly and an oiling assembly. The second shell is arranged at the inlet end of the first shell. The necking-down assembly is arranged in the first shell and used for conducting necking-down treatment on the steel pipe. The oiling assembly is arranged in the second shell, and lubricating oil is smeared on the steel pipe before necking. The oil coating assembly comprises an oil coating piece which rolls through a plurality of balls and coats lubricating oil on the steel pipe; the oil supplementing part is used for supplementing lubricating oil for the oil coating part; and the pushing and pressing piece is used for pushing the oil storage sponge to extrude the lubricating oil filled in the oil storage sponge to the balls. When a steel pipe passes through the second shell, the multiple balls can be driven to rotate, and therefore lubricating oil stained on the balls is evenly smeared on the steel pipe. A layer of lubricating film can be formed on the surface of the steel pipe, friction force between the steel pipe and the necking module is reduced, and therefore friction loss in the machining process is reduced.

The utility model belongs to the technical field of refrigeration compressors, and discloses an air cylinder assembly, a compressor pump body and a compressor. An air cylinder cavity is formed in the center of the air cylinder body, and an air cylinder sliding piece groove is formed in the circumferential wall of the air cylinder cavity in the radial direction. At the notch end of the air cylinder sliding sheet groove, the joint of the groove wall of the air cylinder sliding sheet groove and the peripheral wall of the air cylinder cavity is of a fillet structure. The fillet structure is located on one side of an air suction cavity of the air cylinder cavity. According to the utility model, the local stress condition of the contact part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is improved, the friction condition of the matching part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is greatly improved, the lubrication condition between the cylinder slip sheet groove and the slip sheet is effectively improved, the friction loss and abrasion are reduced, and the service life is prolonged. Therefore, the mechanical efficiency of the cylinder assembly and the compressor pump body is improved, and the working performance of the compressor is ensured.

The utility model discloses a low-noise worm and gear speed reducer, and relates to the technical field of speed reducers. Comprising a shell, a turbine assembly is arranged between the front inner wall and the rear inner wall of the shell and close to the lower side, a worm assembly is arranged between the left side wall and the right side wall of the shell on the upper side of the turbine assembly, a sound insulation plate is fixedly installed on the inner wall of the shell, a rubber shock pad is fixedly installed on the lower surface of the shell, and a bottom box is fixedly installed on the lower surface of the rubber shock pad. The bottom box is locked and fixed to the shell through a locking mechanism, and a partition plate is installed on the inner wall, close to the left side, of the bottom box. The buffering and damping functions of the bottom of the shell are added, the sound insulation function of the inner wall of the shell is added, noise of the worm and gear speed reducer is greatly reduced, lubricating oil can be cooled in the using process, impurities in the lubricating oil are filtered out, the worm and gear can be better lubricated by the lubricating oil, friction loss or noise is reduced, and the service life of the worm and gear speed reducer is prolonged. And the service life of the worm and gear speed reducer is prolonged.

The utility model discloses a telescopic arm middle section arm and a single cylinder bolt type telescopic arm, the middle section arm comprises an arm pin and a pin hole, one side or two sides of the arm pin are provided with a detection switch used for controlling a pin plugging and unplugging mechanism to release the arm pin, and the same side of the pin hole and the arm pin is correspondingly provided with a detection block used for switching the detection switch to release signals. According to the utility model, the plurality of middle knuckle arms are sequentially sleeved, when the single-cylinder bolt type telescopic arm is manufactured, the detection switch of the inner knuckle arm corresponds to the detection block of the adjacent outer knuckle arm, and when the positions of the arm pin and the pin hole of the inner knuckle arm and the outer knuckle arm correspond, the detection switch acquires a signal of the detection block and immediately sends an arm pin releasing signal to the pin plugging and unplugging mechanism controller, so that the single-cylinder bolt type telescopic arm is manufactured. The arm pin of the inner knuckle arm pops up and is inserted into the corresponding pin hole of the outer knuckle arm, the inner knuckle arm and the outer knuckle arm are locked, the arm pin does not make contact with the outer knuckle arm before being released, and noise and friction loss caused by sliding of the arm pin of the inner knuckle arm relative to the outer knuckle arm are reduced.

The invention discloses concentric double-shaft stirring equipment, and relates to the field of stirring equipment, the concentric double-shaft stirring equipment comprises an outer shaft and an inner shaft which are coaxially arranged, the inner shaft is sleeved with the outer shaft, the outer shaft is coaxially sleeved with a box body, one side of the box body is provided with an outer shaft transmission assembly used for driving the outer shaft to transmit, and a transmission part of the outer shaft transmission assembly is arranged in the box body; an inner cavity is formed between the outer shaft and the inner shaft, an outer cavity is formed between the outer shaft and the box body, and a lubricating oil circulating system is arranged between the inner cavity and the outer cavity. Meanwhile, full lubrication and cooling of all friction parts are achieved through a lubricating oil circulating system, friction loss is reduced, and the service life of equipment is prolonged.