44results about How to "Play a self-lubricating role" patented technology

The invention provides a cast aluminum alloy micro-arc oxidation ceramic membrane layer and a preparation method of the cast aluminum alloy micro-arc oxidation ceramic membrane layer. The adopted bath solution is an aqueous solution of Na2SiO3.9H2O, Na2MnO4.2H2O, NaF, NaOH and Bi2O3. The bath solution adopted by the cast aluminum alloy micro-arc oxidation ceramic membrane layer and the preparation method can form a membrane on the surface of cast aluminum alloy with the high silicon content more easily, and can facilitate uniform membrane formation on the surface of the cast aluminum alloy, and therefore the surface of the formed ceramic membrane layer is smooth, and the roughness is low. In addition, the added Bi2O3 in the bath solution can play a role in self-lubrication, and the wear resistance performance of the micro-arc oxidation ceramic membrane layer is improved.

Disclosed is a simple assembly method for miniature ball bearings. Firstly, a ball holding ring (5) and a support (6) are manufactured, the support is placed in a positioning ring (5.2) of the ball holding ring, and a cage (3) soaked with lubricant is placed at the bottom of an inner ring of the support. Secondly, an inner ring (4) is mounted in the cage, the inner ring contacts with the bottom of the inner ring of the support, rolling balls (2) soaked with lubricant and having equal amount to that of arranged cage pockets are placed on an assembly support surface, and one of the rolling balls is toggled slightly by a small scoop so that the rolling ball enters one pocket of the cage until all the rolling balls enter the cage pockets. Thirdly, one slope end of an outer ring (1) is aligned with the cage and is pressed down to fully contact with an outer ring, with the height of H, of the positioning rings on the ball holding ring. Finally, the ball holding ring and the support are removed after a miniature ball bearing not assembled, the ball holding ring and the support are turned over, the outer ring continues to be pressed to be parallel to the inner ring, and accordingly simple assembly of the miniature ball bearing is achieved.

The invention relates to a method for lubricating an air cylinder of an automobile air-conditioning compressor. The method for lubricating the air cylinder of the automobile air-conditioning compressor comprises one step of arranging a lubricating layer between a piston hole of a cylinder body and a piston, wherein the surface of the piston is provided with a coating or a piston ring; a tin layer with the thickness of 0.5 to 10 mu m is arranged on the inner wall of the piston hole by a chemical immersion plating method; and the chemical immersion plating method comprises the processes of preparing and cleaning, degreasing and cleaning, rinsing, plating a bath, neutralizing, rinsing again and blowing. In the method for lubricating the air cylinder of the automobile air-conditioning compressor, the tin layer is arranged on the inner wall of the piston hole of the air cylinder of the automobile air-conditioning compressor by the chemical immersion plating method, so that a self-lubricating effect is achieved when the compressor is started by utilizing the lubricating property of the tin, the damage to the piston coating and the piston ring and the sliding of an automobile clutch are avoided, and the service life of the compressor is prolonged.

The invention discloses a dyeing device for sun umbrella cloth processing and an application method thereof. The dyeing device comprises a supporting frame, supporting legs are fixedly mounted at thebottom of the supporting frame, the number of the supporting legs is two, a connecting frame is fixedly connected between the two supporting legs, and a pigment barrel is placed on the upper portion of the connecting frame; and a discharging roller is movably mounted at one end of the supporting frame, a first steering roller is movably mounted at the position, located on one side of the discharging roller, of the inner side of the supporting frame, and a dyeing roller is movably mounted at the position, close to the lower portion, of the center of the interior of the pigment barrel. Accordingto the dyeing device for sun umbrella cloth processing, pigment can be stirred, the precipitation phenomenon is avoided, supporting of a power device is not needed, the discharging roller and a winding roller can be conveniently disassembled and assembled, the use convenience is improved, in addition, the impurity removal function is achieved, dust and impurities on the surface of umbrella clothand in holes of the umbrella cloth are prevented from polluting pigment, and the device is more beneficial to using.

The invention discloses a preparation method of an aqueous polyurethane / fluorinated phosphazene nano fiber composite material. The method comprises the following steps: dissolving hexachlorocyclotriphosphazene and 4,4'-(hexafluoro isopropyl fork) bisphenol into a toluene / acetone composite solution; dropwise adding triethylamine and carrying out nucleophilic substitution reaction under a magnetic power stirring condition, and carrying out post-treatment to obtain fluorinated phosphazene nano fibers; adding the nano fibers into polypropylene glycol; then adding isophorone diisocyanate, a catalyst and 2,2-dimethylolpropionic acid until the reaction is completed; reducing the temperature and adding triethylamine to be neutralized; dispersing into the deionized water to obtain an aqueous polyurethane solution; and casting the aqueous polyurethane solution into an extensible sample strip mould to be naturally solidified to obtain the aqueous polyurethane / fluorinated phosphazene nano fiber composite material. According to the preparation method disclosed by the invention, by adopting a chemical in-situ polymerization method, the reaction is added into an aqueous polyurethane basal body, and the successfully obtained aqueous polyurethane composite material has excellent heat stability, extension performance and friction and abrasion performance.

The invention belongs to the technical field of automobile parts and relates to a vehicle special-shaped bearing narrow inner ring. The invention aims at solving the technical problem of unstable operation in the prior art. The vehicle special-shaped bearing narrow inner ring comprises an inner ring body, wherein a shaft hole is formed in the inner ring body, a first retaining ring is arranged at one end of the inner ring body, a second retaining ring is arranged at the other end of the inner ring body, the outer diameter of the first retaining ring is larger than that of the second retaining ring, the outer wall of the inner ring body between the first retaining ring and the second retaining ring forms a tapered outer inclined plane, the outer inclined plane, the first retaining ring and the second retaining ring encircle to form a ball groove for accommodating a ball, the surface of the first retaining ring, which is positioned in the ball groove, has a tapered first retaining ring inclined plane, the surface of the second retaining ring, which is positioned in the ball groove, has a tapered second retaining ring inclined plane, the included angle alpha between the first retaining ring inclined plane and the outer inclined plane is more than 89 degrees and less than 90 degrees, and the included angle beta between the second retaining ring inclined plane and the outer inclined plane is more than 90 degrees and less than 91 degrees. The vehicle special-shaped bearing narrow inner ring provided by the invention is reasonable in design, stable in operation and good in loading performance.

The invention belongs to the technical field of materials, and particularly relates to a method for preparing a high-wear-resistance self-lubricating composite oxide film on the surface of an aluminum alloy friction part. The method comprises the following steps: preparing a composite electrolyte for anodic oxidation; sanding and degreasing the surface of an aluminum alloy, and performing alkaline etching, ash removal and chemical polishing pretreatment; performing composite anodic oxidation treatment to prepare an oxide film, and detecting the hardness; and if the sample does not reach the required hardness, performing heat treatment on the composite oxide film. According to the invention, an oxidization liquid system composed of three acids is designed; the oxide film having high growth speed, high hardness, high wear resistance and high strength and toughness can be grown based on characteristics of pulse current oxidization; and the composite oxide film has higher wear resistance and favorable self-lubricating property through the heat treatment on the oxide film, thereby being applicable to the preparation of oil-free or oil-less lubricating friction parts under different friction conditions (high-speed light load or low-speed heavy load) in the industries of sewing, food, textile, automobiles and the like.

The invention provides a launching method of a pipeline leakage flux inner detector. According to the method, the pipeline leakage flux inner detector is placed on a tray and then placed on a cart through the tray, the pipeline leakage flux inner detector is put into a launching barrel through the tray, and the situation that the pipeline leakage flux inner detector is pulled out together when the tray is pulled out is prevented through a shifting fork push rod; the tray, the cart and the shifting fork push rod are all made of non-magnetic stainless steel; the height and the position can be adjusted through the cart so that the tray can be aligned to the launching barrel; and the shifting fork push rod is used for preventing the pipeline leakage flux inner detector from being pulled out together with the tray. According to the launching method, the launching work of the pipeline leakage flux inner detector can be completed, the launching process is convenient, fast and reliable, and the launching requirement of the pipeline leakage flux inner detector can be met.

The invention discloses an alloy material for a bearing rolling body, which is made of the following raw materials in parts by weight: 80-100 parts of base material, 9-11 parts of lubricant, 6-7 parts of modified graphene oxide, and the base material includes Ti powder, Al powder, Cr powder, Nb powder, Al 2 o 3 powder; the invention also discloses the preparation method of the alloy material, including two steps of ball milling and plasma sintering. The present invention adopts Ti powder, Al powder, Cr powder, Nb powder, Al 2 o 3 The powder is used as the matrix material of the alloy, and lubricant and modified graphene oxide are added, and the alloy material is prepared by two-step ball milling method and plasma sintering method. The addition of stretched lamellar graphene oxide can improve the hardness and strength of the alloy material And other mechanical properties, the synergistic effect of the lubricant and the graphene lubricating film can improve the self-lubricating effect of the alloy material, and the alloy material can be made into a bearing rolling body with excellent comprehensive performance.