8results about How to "Avoid direct abrasion" patented technology

The invention discloses a tooth-shaped structure of a bolt fixing tool. The tooth-shaped structure comprises a drive part, a looping part is concavely arranged inside the drive part; the inner periphery of the looping part is a hollow structure and is approximately a polygonal structure, the intersectional angle between edges of the polygonal structure of the looping part are respectively provided with an escape groove, the escape groove is a recessed arc structure, an opening of the escape groove and an opening of the adjacent escape groove take on a straight edge, the straight edge is a lank line section; a top surface is respectively arranged at the center of the straight edges between two adjacent escape grooves, the top surface is in a planar straight line section structure, the top surface is arranged at the straight edge between the two adjacent escape grooves and is superposed on the straight edge; a first groove and a second groove are respectively recessed between the escape groove and the top surface, the first groove is closer to the escape groove, the second groove is closer to the top surface, the first and the second grooves are arranged in line symmetry with another first and second grooves; based on the intermediate vertical line of the distance between the two side walls of the escape groove with the arc structure, the first and the second grooves are arranged in line symmetry with another first and second grooves by the central vertical line of the distance between the two side walls of the arc structure of the escape grooves. The tooth-shaped structure of a bolt fixation tool can not cause slipping and bruting of the bolt fixing part resulting from the stress concentration of point contact.

The utility model belongs to power generation equipment, and particularly relates to an axial movement measuring and mounting structure of a fan of a thermal power plant. The measuring assembly is connected with the fan shaft and is internally provided with an accommodating cavity; the connecting assembly is arranged in the accommodating cavity of the measuring assembly, and comprises a transmission shaft, an input end of the transmission shaft extends out of the accommodating cavity; one end of the threaded rod is connected with the output end of the transmission shaft; the extrusion pipe is connected with the end, away from the transmission shaft, of the threaded rod. The pin rod is arranged on the inner wall of the containing cavity, and the axis of the pin rod is perpendicular to the axis of the extrusion pipe; the fixed end of the spring is connected to the inner wall of the containing cavity, and the telescopic end is connected with the pin rod. According to the utility model, the problem of abrasion between the sensor and the fan shaft caused by direct installation of the photoelectric sensor on the shaft for displacement measurement is solved, and the problem of data deviation caused by influence on the measurement precision due to instantaneous impact fluctuation generated during high-speed operation of the fan is also solved.

The utility model discloses a locking nut with a metal block, which comprises a nut body, the nut body is hollowed out along the axis of the nut body, a connecting block is slidably connected to the hollowed-out position of the nut body, a threaded groove is formed in the connecting block, a sliding groove is formed in the outer wall of the nut body, and the metal block is arranged in the sliding groove. Inserting blocks are fixedly connected to the inner walls of the two sets of arc-shaped connecting plates, the positions of the inserting blocks correspond to the positions of the two sets of inserting grooves, the inserting blocks are inserted into the adjacent inserting grooves, the two sets of connecting plates are connected through an elastic mechanism, and the connecting blocks are made of metal materials. The arc-shaped connecting plate capable of sliding along the sliding groove is arranged and matched with the spring in the elastic mechanism to push the wedge-shaped face of the inserting block to be tightly attached to the inserting groove, direct abrasion of the nut body is avoided, the connecting plate can be independently replaced after being abraded, and the nut does not need to be wholly replaced. The problem that a traditional small-diameter nut cannot be disassembled due to the fact that the outer surface is rounded is solved, and the maintenance cost is reduced.

This invention relates to the field of food processing equipment technology, and discloses a food processing machine with stable operation, including a mixing cup and a main unit equipped with a motor and a reduction mechanism. The reduction mechanism includes a fixed gear ring, a double gear, a moving gear ring, and a planetary carrier that cooperate with each other. The double gear includes a gear with a shaft hole and a gear shaft passing through the shaft hole. The gear shaft and the motor shaft are arranged side by side, and the motor shaft drives the gear and gear shaft to rotate synchronously. The gear includes an upper gear that meshes with the fixed gear ring and a lower gear that meshes with the moving gear ring. The shaft hole wall is provided with a wear-resistant part, which surrounds the gear shaft to limit the radial movement of the gear shaft. The outer surface of the wear-resistant part is fixedly connected to the shaft hole wall, and a heat dissipation gap is provided between the inner surface of the wear-resistant part and the gear shaft. The axial height h2 of the wear-resistant part and the shaft hole wall height h1 satisfy 1 / 2h1<h2≤h1-2mm. This avoids direct contact between the gear shaft and the shaft hole, provides good wear resistance to the shaft hole, ensures good alignment between the gear and the rotating shaft, and ensures stable operation.

This application relates to a rotary valve, comprising: a valve head having a main flow channel and a first switching flow channel; multiple first switching flow channels arranged around the axis of the valve head; a bushing fixedly disposed within the valve head, forming a static seal with the bushing; the bushing having a transition flow channel and a second switching flow channel; the transition flow channel communicating with the main flow channel, and the first switching flow channels corresponding to and communicating with the second switching flow channels; a valve core rotatably disposed within the bushing, forming a dynamic seal with the bushing; the valve core having a central flow channel, a first connecting flow channel, and a second connecting flow channel; the first connecting flow channel always communicating with the central flow channel and the transition flow channel; the second connecting flow channel being used to switch the central flow channel to communicate with different second switching flow channels after the valve core rotates. This utility model reduces the processing difficulty and inspection of rotary valves, improves the wear resistance of the valve head, and reduces the cost of replacing the entire valve head.

The utility model relates to the technical field of blade processing, and discloses a blade conveying device for a blade detector, which comprises a mounting frame, a conveying plate fixedly mounted on the upper surface of the mounting frame, a support rod fixedly mounted at the upper end of the conveying plate, an L-shaped conveying plate arranged at the lower end of the support rod and positioned in the conveying plate, and a plurality of blades arranged on the L-shaped conveying plate. The auxiliary mechanism is arranged on the L-shaped conveying plate, the auxiliary mechanism comprises a rubber pad and two threaded rods, four positioning rods are fixedly connected to the left end of the upper surface of the L-shaped conveying plate, the rubber pad is installed on the upper surface of the L-shaped conveying plate, and the upper ends of the four positioning rods all penetrate through the upper surface of the rubber pad. According to the blade conveying device, the blade is in flexible contact with the rubber pad after falling to the upper end of the L-shaped conveying plate, so that scratches on the contact surface of the blade and the L-shaped conveying plate are prevented, direct abrasion of the L-shaped conveying plate to the surface of the blade is avoided, the qualified rate of the blade is increased, and the subsequent blade detection effect is improved.

A kind of wear-resistant large shovel for heavy load operation, it is related to the technical field of shovel, solve the problem that the thickness of wear-resistant steel plate is excessively increased to improve wear resistance in prior art, leading to the excessive weight of shovel itself, affecting operation efficiency.Problems include bucket body, the edge of the bucket mouth of the bucket body is connected with reinforcing blade, the back of the bucket body is provided with trunnion seat;The inside of the two side walls of the bucket body is provided with a plurality of transverse reinforcing ribs and longitudinal reinforcing ribs, the transverse reinforcing ribs and the longitudinal reinforcing ribs are vertically intersected and distributed and form a grid structure, and the transverse reinforcing ribs and the longitudinal reinforcing ribs are welded at the intersection;The inside of the two side walls of the bucket body is also provided with a plurality of transverse reinforcing bars and longitudinal reinforcing bars, the transverse reinforcing bars and the longitudinal reinforcing bars are vertically intersected and distributed and form a grid structure, and the transverse reinforcing bars and the longitudinal reinforcing bars are welded at the intersection.The beneficial effect is: it can improve wear resistance, effectively control the weight of shovel itself, and ensure flexibility and efficiency during operation.

The utility model discloses a two-pole one-way impeller rotor which comprises a rotor frame, a magnetic ring arranged on the rotor frame in a sleeved mode and an impeller arranged at one end of the rotor frame, and the impeller comprises an impeller seat arranged at the end of the rotor frame and a plurality of elastic blades arranged on the upper end face of the impeller seat in a circle. Each elastic blade comprises a fixed part fixed on the impeller seat and an elastic part which is connected with the fixed part and is separated from the impeller, and the impeller is provided with a positioning part which can be blocked by the elastic part when the elastic part deforms under the impact of water flow when the impeller rotates. According to the utility model, the blades are divided into the fixed parts and the elastic parts, the fixed parts are connected with the impeller seat, the elastic parts bend and extend in the direction far away from the center of the rotor frame and can elastically deform and displace when being impacted by water flow, and the elastic blades flexibly deform to absorb local impact load, relieve root stress concentration and reduce fatigue fracture risk; therefore, the rotor is large in lift, large in drainage flow, high in efficiency and long in service life.