8results about How to "Avoid secondary wear" patented technology

The utility model relates to an automatic sand dressing device of grinding machine, including the machine case and sand dressing mechanism, the bottom side of machine case installs the grinding wheel, and the grinding wheel rotates through the drive of driving device, sand dressing mechanism installs in the bottom other side of machine case, and the working end of sand dressing mechanism installs sand dressing subassembly, sand dressing subassembly is matched with the working grinding surface of grinding wheel, the inside of machine case is equipped with linear conveying installation cavity, and linear conveying device of linear transmission connection with sand dressing mechanism is installed in linear conveying installation cavity. This automatic sand dressing device can replace artificial to complete the dressing of grinding wheel, and the working efficiency is high, because sand dressing subassembly is matched with the working grinding surface of grinding wheel, and the dressing accuracy is also high, prolongs the service life of grinding wheel, avoids the secondary wear of artificial manual dressing.

The utility model relates to the technical field of chemical catalytic reaction equipment provides a kind of for solid particle catalysis suspended state fixed bed reaction device, including reactor, solid particle catalyst layer, Reynolds number control unit and filter screen structure;Solid particle catalyst layer is filled in reactor, and its filling volume occupies 1 / 3~1 / 2 of reactor reaction zone effective volume;Reynolds number control unit is connected with reactor, and filter screen structure is arranged at the top and bottom of the reactor reaction zone.This scheme not only solves the problem of swelling blockage in the application of solid particle catalyst, prolongs the cycle of operation, and the suspended state promotes catalyst and fluid to be in full contact, prevents material short circuit, improves conversion rate, and further inhibits mechanical loss, reduces production cost.

The application relates to the technical field of valves and discloses a speed-regulating rotary valve, which comprises a shell and a valve core rotatably arranged in the shell, the side surface of the valve core is provided with an annular mounting groove, and a sealing ring is arranged in the mounting groove; the sealing ring comprises a bearing part arranged in the mounting groove and two abutting parts distributed along the axial direction of the valve core, the abutting parts are located between the bearing part and the inner wall of the shell, the inner side of the abutting part is connected with the bearing part, the outer side of the abutting part extends in the direction of the other abutting part and is inclined, and the outer end surface of the abutting part elastically abuts against the inner wall of the shell; the outer wall of the bearing part, the inner wall of the shell and the inner side walls of the two abutting parts jointly form an annular collecting cavity, and the annular collecting cavity is used for collecting wear debris generated by the relative rotation between the sealing ring and the inner wall of the shell; the speed-regulating rotary valve has the effects of improving the sealing performance of the valve and the operation stability of the valve.

The utility model discloses a gear with a lubricating function, which relates to the technical field of gears and comprises a gear body, the surface of the outer ring of the gear body is provided with a diversion trench and is slidably connected with oil guide beads, an oil storage bin is arranged in a cavity of the gear body, a plurality of capillary oil guide hole groups are arranged in the cavity of the gear body, and the capillary oil guide hole groups are communicated with the diversion trench. Oil guide fibers are fixedly connected into each capillary oil guide hole set, a threaded oil injection opening is formed in the side wall of the gear body, a sealing clamping head is connected to the side wall of the gear body in a threaded mode, and one end of the sealing clamping head is fixedly connected with a disintegrating slag magnetic attraction block through an opening. According to the gear body provided by the utility model, on the basis of realizing uniform oil outlet for lubrication, metal scraps left inside are adsorbed through magnetic attraction to be conveniently cleaned, so that the problems that an existing lubricating gear cannot be automatically adjusted in lubricating oil supply, oil leakage and pollution are easily caused at a high speed, low-speed lubrication is insufficient, and the service life of the gear body is prolonged are solved. And metal scraps inside are deposited and are difficult to clean.

The invention discloses aluminum alloy extrusion die abrasion surface treatment equipment, and belongs to the technical field of die repairing, the aluminum alloy extrusion die abrasion surface treatment equipment comprises a supporting bottom plate, a fan-shaped rotating frame is movably arranged on the supporting bottom plate, a lifting assembly, a pressing assembly, a positioning assembly and a machining assembly are arranged on the fan-shaped rotating frame, and the lifting assembly comprises a lifting annular plate; the downward pressing assembly comprises a downward pressing ring plate, four strip-shaped sliding plates are slidably installed on the lifting ring plate and the downward pressing ring plate in a circumferential array mode, a first linkage unit is arranged between the four strip-shaped sliding plates corresponding to the same assembly, and the lifting ring plate and the downward pressing ring plate are further provided with supporting units. Through cooperative cooperation of the lifting assembly, the downward pressing assembly and the positioning assembly, all-directional fixing of the mold is achieved from the upper dimension and the lower dimension in the vertical direction and the radial dimension in the horizontal direction, the mold is effectively prevented from deviating or shaking in the machining process, and the clamping stability and the machining precision are remarkably improved.

The application relates to the technical field of pipeline internal cleaning and descaling mechanical equipment, and discloses a metal pipe inner wall precise cleaning and descaling device, which comprises a center transmission main shaft, a precise descaling mechanism and a synchronous advancing mechanism which are arranged on the center transmission main shaft respectively, the synchronous advancing mechanism is driven by the center transmission main shaft and is used for driving the whole device to advance along the inner wall of the pipe, the precise descaling mechanism comprises a planetary transmission assembly which is driven by the center transmission main shaft and a descaling tool bit which is linked with the planetary transmission assembly, the precise descaling mechanism comprises a planetary transmission assembly which is driven by the center transmission main shaft and a descaling tool bit which is linked with the planetary transmission assembly, and the precise descaling mechanism is provided with a self-adaptive variable-angle mechanism. Through the ingeniously designed planetary transmission assembly and elastic limiting assembly, the self-adaptive variable-angle descaling function in a pure mechanical mode is realized.

The invention discloses a guide rail, an engine timing system, an engine and a vehicle, the guide rail is provided with a first side part and a second side part which are oppositely arranged, the first side part is provided with a guide surface used for abutting against one side, in the thickness direction of a chain, of the chain, and the thickness direction of the guide rail and the extending direction of the guide rail are both perpendicular to the width direction of the guide rail; in a projection plane parallel to the thickness direction and the width direction of the guide rail, a projection line formed by the guide surface protrudes back to the second side part in the thickness direction of the guide rail, and the projection line is provided with a first end point, a second end point and a protruding part located between the first end point and the second end point which are arranged in the width direction of the guide rail; and in the direction from the protruding part to the first end point and the direction from the protruding part to the second end point, the protruding distance of the projection line is gradually reduced. According to the guide rail, the problem that the guide face is prone to abrasion can be solved, and the NVH performance of an engine timing system is improved.

The utility model relates to the technical field of cross shafts, and discloses a sealing cross shaft universal joint for a passenger car, which comprises a cross shaft body, a shaft neck, a shaft sleeve and a roller pin rotationally arranged between the shaft sleeve and the shaft neck, two symmetrically arranged protective half shells are sleeved outside the cross shaft body, a fixing hole is formed in the diagonal position of any protective half shell, and the shaft neck is sleeved outside the shaft sleeve. Fixing holes are formed in the shaft neck, fixing rods used in cooperation with the fixing holes are arranged at the other two opposite angle positions of each protection half shell, a through oil injection opening is formed in any protection half shell and used for injecting grease into an inner cavity of the corresponding protection half shell, a first oil seal is further arranged on the shaft neck and is an external C-shaped oil seal, and a second oil seal is arranged on the shaft neck and is used for sealing the outer C-shaped oil seal. The second oil seal is arranged at the position of an inner port of the shaft sleeve and is a built-in star-shaped oil seal, the first oil seal and the second oil seal are used for preventing impurities from entering and lubricating oil from flowing out, and the problems that existing equipment is prone to being damaged by the impurities in the external environment, and lubricating oil is prone to leaking are solved.