77results about How to "Solve the problem of severe wear and tear" patented technology

The invention discloses a method and equipment for pneumatically conveying and filling gangue in a coal mine well. An air compressor, a gasholder, a high pressure air pipe, a feeding device and a pneumatic conveying pipe are combined and matched, and in the coal mine well, gangue material is conveyed to filling areas such as a goaf and coal areas under buildings, railways and water. Particles are uniformly distributed via a swirl generating tube, the axial velocity of the particles is increased by over 60 percent compared with that of a horizontal straight pipe, and the ability of a system to convey the particles of the gangue is greatly improved via the swirl generating tube; the particles are conveyed via a pipeline, the system is sealed, less dust floats and escapes, and the environment is protected; the pipeline for conveying can be flexibly arranged, equipment process and configuration are simplified, and problems of large power consumption and serious pipeline abrasion of the pneumatic conveying of the gangue in the coal mine well are solved. The equipment is simple in structure, convenient to operate and good in use effect.

The invention relates to a device for increasing the transportation resistance of slurry in a filling pipeline in a small time line high pressure head mine filling system, and discloses a device for increasing the resistance and regulating the pressure in filling slurry pipeline transportation. The problem that the local pressure in filling slurry pipeline transportation is too large is solved in a mode of increasing the resistance loss of the slurry in the pipeline. The input end and the output end of the device for increasing the resistance and regulating the pressure are both connected to the pipeline for transporting the filling slurry, and the horizontal height of the input end of the device for increasing the resistance and regulating the pressure is larger than that of the output end of the device for increasing the resistance and regulating the pressure. The device is simple in technological process and convenient to install, and the flow state of mortar in the pipeline is stable.

The invention provides multi-element low-alloy wear-resistant steel, which relates to special multi-element low-alloy wear-resistant steel for manufacturing crusher hammer heads, in particular to multi-element low-alloy air-quench wear-resistant steel, namely 50SiMnCr2MoRe. In order to solve the problem of the severe wear of crusher hammer heads in the prior art, the multi-element low-alloy wear-resistant steel comprises the following element in percentage by weight: 0.46 to 0.52 percent of C, 0.8 to 1.0 percent of Si, 1.0 to 1.4 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.030 percent of S, 2.0 to 2.8 percent of Cr, 0.2 to 0.5 percent of Mo and 0.1 to 0.15 percent of Re, and the steel is manufactured through the following heat treatment of performing air quenching at 900 to 950 DEG C, tempering the obtained product to be between 250 and 300 DEG C, preserving heat for 3 hours and then naturally cooling the obtained product. As the multi-element low-alloy wear-resistant steel disclosed by the invention has high hardness and toughness, the lifespan of the crusher hammer heads manufactured from the steel is 5 times longer than common high-manganese wear-resistant steel, and the multi-element low-alloy wear-resistant steel contains no rare/noble elements and is low in price which is about two thirds of that of common high-manganese steel.

The invention discloses a high-strength and wear-resistant roller bit for petroleum and gas drilling. The roller bit comprises teeth (1), a roller cone (2) and a roller palm (3) and is characterized in that an embedded ring (4) is arranged at the internal bottom end of the roller cone (2), the embedded ring (4) and the roller cone (2) are connected in the compound manner of hot embedding, a bush (5) is arranged on the internal wall of the roller cone (2), the bush (5) and the roller cone (2) are connected in the compound manner of hot embedding, a compound seal ring (6) is hot embedded between the roller cone (2) and the outermost edge of the roller palm (3), the embedded ring (4) and the bush (5) are made from ceramic materials of carbide, nitride or oxide, and the seal ring (6) is made from cermets or the ceramic materials. Ceramics, cermets and the bit are skillfully combined into a whole, the ceramics and the cermets are not only utilized as connecting pieces, but also play the role of protecting the bit; high strength, wear resistance and corrosion resistance of the ceramics are displayed, and service life and reliability of bit parts are also ensured.

The invention discloses an automatic cable winding and unwinding device for a charging pile. The automatic cable winding and unwinding device comprises a charging pile body, a winding cavity is formedin the left side of the charging pile body, a belt groove is formed in the lower side of the winding cavity, a moving groove is formed in the right side of the winding cavity, a bevel gear meshing groove is formed between the moving groove and the belt groove, a winding device is arranged in the winding cavity, the winding device comprises a winding screw rod which is in running fit with the wallbetween the belt groove and the winding cavity, the winding screw rod extends downwards into the winding cavity, and is in threaded connection with a threaded block. A rotating abutting block capableof abutting against a rotating block to rotate is fixedly connected to the inner wall of the left side of a winding space, the winding screw rod rotates to drive the threaded block, and the rotatingblock rotates to enable a winding wheel to ascend and rotate at the same time, so that the uniform winding function is achieved.

The invention discloses a main shaft for a machine tool, the machine tool, and a method for preventing the machine tool from being worn. A radial air bearing of the main shaft for the machine tool is supported in a main shaft box body, one end of the radial air bearing is connected with the end face of an air floating shaft on the front end face, and the other end of the radial air bearing is connected with the end face of an air floating shaft on the rear end face; a piston is connected with an air floating main shaft; an air floating main shaft piston is connected with a guiding chuck; a side floating disc is connected with the air floating main shaft; the air floating main shaft piston, a taper sleeve and the guiding chuck are connected onto the air floating main shaft; gas is contained in the main shaft. The main shaft for the machine tool is utilized, so that the problem that the main shaft of machine tool equipment in the prior art is mainly mechanically supported by the bearing, and the mechanical wear is severe can be solved; the occurrence of the phenomenon that the rotation stability of the main shaft gets worse along with the increase of processing time can be effectively prevented; the precision machining accuracy and the yield of the product are improved; the production efficiency is further improved remarkably and the production cost is reduced.

The invention discloses a self-lubricating car transmission shaft. The self-lubricating car transmission shaft comprises a stretchable sleeve, a universal joint fork is arranged at one end of the stretchable sleeve, a sliding spline groove is embedded inside the other end of the stretchable sleeve, an oil sealing ring is arranged at the end, far away from the stretchable sleeve, of the sliding spline groove, an oil sealing cover is arranged on the side, far away from the sliding spline groove, of the oil sealing ring, and a transmission shaft pipe is arranged at the axis position of the side, far away from the oil sealing ring, of the oil sealing cover; a steel ball holder is arranged at the end, located inside the stretchable sleeve, of a lubricating nipple, steel balls are fixed to the steel ball holder and are in contact with the sliding spline groove, a lubricating oil storage tank is arranged above the lubricating nipple, the steel balls are driven to rotate when the sliding spline groove and the stretchable sleeve have relative displacement, and lubricating oil inside the lubricating oil storage tank is brought into the stretchable sleeve; and the lubricating effect on the sliding spline groove and spline teeth is achieved automatically, and the problem that abrasion of the sliding spline groove and the spline teeth is serious due to the fact that the stretchable sleeve is lack of lubricating oil is solved.

The invention discloses a three motor driven single-screw compressor control method. The method includes the following steps that firstly, a screw rod is arranged in a machine shell, two star wheels are symmetrically arranged on the two sides of the screw rod, the screw rod and the two star wheels are independently connected with three motors through couplers correspondingly, the rotating speeds of the three motors are controlled through frequency converters, and the frequency converters are connected with a controller; and secondly, rotating speed sensors are used for measuring the real-timerotating speed of the three motors, rotating speed signals of the three rotating speed sensors are analyzed through the controller, the rotating speed is set in the controller, the difference value ofthe rotating speed signals of the three motors is analyzed according to the controller, increasing or decreasing of the frequency of the frequency converters is controlled according to difference value signals, then the rotating speeds of the three motors are controlled, and synchronous rotation of the three motors is achieved. By means of the three motor driven single-screw compressor control method, flow of a single-screw compressor can be adjusted, stepless variable-flow adjustment is achieved, the compression ratio of the single-screw compressor can also be changed, the control process issimple and convenient, and the control effect is reliable.

The invention discloses a locking device which comprises a first locking cylinder, a second locking cylinder, movable parts and fixed parts. Moving grooves are formed in the fixed parts. Containing grooves are formed in the movable parts. The first locking cylinder is movably connected with the movable parts and is contained in the containing grooves and the moving grooves. The movable parts move in the first direction relative to the fixed parts. The first locking cylinder moves in the moving grooves along with the movable parts and the first locking cylinder moves in the second direction in the containing grooves so that the first locking cylinder and the second locking cylinder can be unlocked or locked, wherein the first direction is perpendicular to the second direction. According to the locking device, the relative movement of the movable parts and the fixed parts is used as the deflecting movement, friction is only generated between the first locking cylinder and the second locking cylinder in the locking state, friction between the first locking cylinder and the second locking cylinder is relieved, abrasion of the first locking cylinder and the second locking cylinder is relieved, the service life of the locking device is prolonged, and the problem of serious abrasion caused by constant friction due to linear movement between the first locking cylinder and the second locking cylinder in the prior art is solved.

The invention relates to the technical field of textile, in particular to a guide rail auxiliary device for a textile printing machine. The guide rail auxiliary device solves the problems that guide rails and roller wheels are easy to wear, and vibration noises of a trolley base are great. The guide rail auxiliary device structurally comprises a rectangular trolley base, wherein a primary guide rail device is arranged below one end of the trolley base; a secondary guide rail is arranged below the other end of the trolley base; the primary guide rail device comprises a primary guide rail, a primary roller wheel, a first fastening bolt and a primary bracket; the secondary guide rail device comprises a secondary guide rail, a secondary roller wheel, a rotary shaft and a secondary bracket; the top end of the primary bracket is provided with a positioning boss which is fitted with a positioning groove in the bottom of the trolley base; and the top end of the secondary bracket is provided with a positioning boss which is fitted with the positioning groove in the bottom of the trolley base. The guide rail auxiliary device for the textile printing machine is simple to operate and convenient in use, and the working efficiency is improved.

The invention discloses a fixed rod distance adjustable trailer including a rear plate, a motor is mounted on one side of the rear plate, one end of the first tooth transmission lever is connected with a second fixing lever, one end of the second tooth transmission rod is connected with a first fixing rod, a second slider is connected at a position close to one side of the trailer body on the disc, one side of the trailer body is respectively provided with a first drag bar and a second drag bar through a rotating shaft, one end of the first drag bar is provided with a first sleeve hole. A fixed rod movable structure is provided, the fixed rod movable structure includes a first toothed drive lever, a second toothed drive lever, a gear and a motor, the problem that the distance between the two fixed rods is not changed, and when the trailer moves, the tire is stuck between the two fixed rods, thereby affecting the operation of the vehicle is solved. The first drag rod and the second dragrod are arranged, so that the problem that the tire of the trailer is subjected to large force and the tire is seriously worn in the turning process when the single rod drags the trolley to move is solved.

The invention discloses a compressor connecting rod and a manufacturing method thereof. The compressor connecting rod includes a body, one end of the body is provided with a first hole, and the other end of the body is provided with a second hole. The radial size of the first hole is larger than the radial size of the second hole, and the inner wall of the first hole is provided with a wear-resistant layer. According to the compressor connecting rod of the embodiment of the present invention, the bluing layer can improve the surface hardness and wear resistance, strengthen the first channel, greatly improve the wear resistance of the inner wall surface, and reduce the scratch and wear of the first channel , at the same time, the second hole will not be strengthened synchronously, which avoids the increased wear of the piston pin matched with the second hole, improves the overall wear resistance of the compressor connecting rod, prolongs the service life, and effectively solves the two problems of the connecting rod The channel cannot realize the problem of different hardness.

The invention discloses a self-compensation intelligent lip-shaped seal. The self-compensation intelligent lip-shaped seal comprises a working cavity outer shell, a sealing ring body in interference fit with the outer shell, a metal framework inlaid in the sealing ring body, a common metal spring inlaid in a groove in the lower part of the sealing ring body, an SMA memory alloy ring nested in thecommon metal spring and a rotating shaft in contact with the sealing ring body; and the SMA memory alloy ring and the common metal spring jointly ensure the contact pressure between a sealing lip anda shaft, the radial force is mainly provided by the common metal spring in a low-temperature section and a normal-temperature section, and the radial force is mainly provided by the SMA memory alloy ring in a high-temperature section. According to the self-compensation intelligent lip-shaped seal, the SMA memory alloy ring is nested in the common metal spring, so that compensation of the radial force in a high-temperature environment is met, excessive abrasion caused by overlarge radial force in a low-temperature environment is avoided, and stable and long-term intelligent sealing in a wide temperature region can be realized.

The invention discloses a compound gasket for an engine, comprising a metal gasket body, wherein a plurality of cylinder holes and mounting holes are formed in the metal gasket body, sealing rings are inlaid in the cylinder holes; the sealing ring comprises a rubber sleeve, a first elastic layer, a second elastic layer and a flexible layer; the sealing rings are connected with the inner walls of the metal gasket body by the first elastic layers, the rubber sleeve is exposed from the upper end and the lower end of the metal gasket body and is folded outwards to form sideways, a plurality of flanges are formed on the flexible layer; and the flanges are arranged on the metal gasket body in parallel at equal intervals, a clearance between the flanges forms a groove, and the flanges and the grooves are combined to form a waveform or a teeth shape. The compound gasket for an engine main solves the problem of poor airtightness in connection of two planes, and also solves the problems of serious abrasion of a sealing gasket, a fastener and a contact surface; and due to the specially-made metal gasket, capabilities of elasticity, toughness, strength and corrosion resistance of the metal gasket are enhanced, and the service life of the metal gasket is prolonged.

The invention provides an industrial robot which comprises a base body assembly, an extension arm assembly and a front arm assembly. The base body assembly comprises an elbow shell and a hollow type speed reducer fixedly arranged on a seam allowance at the front end of the elbow shell; the first end of the axial direction of the extension arm assembly is fixedly arranged at the output end of the speed reducer through a first screw; the front arm assembly is fixedly arranged at the second end of the axial direction of the extension arm assembly through a second screw; the installation surface of the first end of the axial direction of the extension arm assembly and the installation surface of the front arm assembly are the same; and the installation surface of the second end of the axial direction of the extension arm assembly and the installation surface of the output end of the speed reducer are the same. According to the industrial robot provided by the embodiment of the invention, the end faces of two ends of the axial direction of the extension arm assembly are the same as the installation surface of the front arm assembly and the installation surface of the output end of the speed reducer, so that the arm length of the industrial robot can be increased, the working radius of the industrial robot can be effectively increased, and meanwhile, the flexibility in assembling theindustrial robot is improved.

An aluminum alloy and steel optimized welding method based on magnetic control resistance spot welding comprises the steps that a steel plate and an aluminum alloy plate are arranged between an electrode and a controllable magnetic field, Joule heat is generated in the steel plate by applying welding current, and the temperature of the side, close to the steel plate, of the aluminum alloy plate is evenly increased through the blocking effect of a high-resistivity oxidation film between the steel plate and the aluminum alloy plate; and the side, close to the steel plate, of the aluminum alloy plate is molten to form molten aluminum alloy, the molten aluminum alloy flows and is stirred at a high speed under the action of Lorentz force generated by a magnetic field and current, aggregation of oxide film defects near an interface is inhibited, and thin and uniform intermetallic compounds are formed by heterogeneous materials on the two sides of the interface. By heating a steel side resistor, the heat input of the aluminum side is reduced, the thinning of the aluminum plate is reduced, the surface indentation of the aluminum plate is eliminated, and the thickness of an interface intermetallic compound layer is controlled; and lorentz force is generated through interaction of an external magnetic field and current, molten aluminum alloy is driven to flow at a high speed, the aluminum side nugget structure and defect distribution are improved, and the mechanical performance of a welded joint is improved. By avoiding direct contact between a copper electrode and an aluminum plate, electrode abrasion is reduced, and the performance, appearance quality and welding spot quality stability of an aluminum steel spot welding joint are improved.

The invention discloses a method and system for long-distance conveying of condensate polishing resin, and the method comprises the following steps: conveying to-be-conveyed resin in a hydraulic conveying manner, then conveying the to-be-conveyed resin in a pneumatic conveying manner, and then conveying the to-be-conveyed resin in a hydraulic and pneumatic mixed manner. The method and the system can effectively solve the problems of pipeline blockage and serious resin abrasion in long-distance resin transmission.

The invention discloses a wet brake drive axle of a scraper. The drive axle comprises a hub reduction mechanism, a wet brake, a half axle, a main drive assembly and an axle housing. The wet brake is provided with a brake shell, a brake spring is arranged in the brake shell and makes a piston cover pressed on a brake piston ring, the brake cover is connected with a fixed static friction plate, a movable friction plate is arranged on the position corresponding to the static friction plate, a connection groove is formed in the outer side of the brake cover, and a floating seal is arranged in the connection groove; a planetary wheel is disposed on the hub reduction mechanism and fixed to a planetary wheel frame through a planetary wheel shaft; a sun gear is fixed to the half axle, the sun gear drives the planetary wheel and the planetary wheel frame to rotate around the sun gear, the planetary wheel frame is fixed to a hub shell through bolts, and the planetary wheel frame drives the hub shell to rotate. The friction force between the movable friction plate and the static friction plate is reduced, the service life is improved, the structure is simple, and the use and maintenance cost is low.