34results about How to "Solve the lack of wear resistance" patented technology

The invention discloses a novel perfluoropolyether alkoxysilane compound and a synthesis method thereof. The compound structure is shown in formula (1), and the synthesis method is as follows: hydroxyl-terminated perfluoropolyether (PFPE), 3-(2 ‑Aminoethyl)aminopropyltrimethoxysilane, 3‑(2,3‑glycidoxy)propyltrimethoxysilane (KH560), HDI trimer in a molar ratio of 1:2:2:1 In the reaction process, a certain amount of solvent is used to dilute and mix the hydroxyl-terminated perfluoropolyether, 3-(2-aminoethyl) aminopropyltrimethoxysilane, and then dropwise add the HDI trimer. After reacting for 6 hours at a certain temperature , then add KH560 dropwise, react at a certain temperature for another 6 hours, and then remove the solvent under reduced pressure to obtain the perfluoropolyether alkoxysilane compound of the present invention. The compound can be coated on the surface of glass, plastic, film and other substrates, and after cross-linking and curing, it forms a solid film, endows the substrate with excellent anti-fingerprint and anti-fouling properties, and has excellent wear resistance.

The invention relates to a method for reinforcing the tooth surface of a driving wheel gear ring of a crawler vehicle. The problem that the wear resistance of the tooth surface of the driving wheel gear ring is insufficient is effectively solved. The 42CrMo driving wheel gear ring is forged by a laser cladding manufacture technology. A reinforcing layer which is 3 mm in depth is formed in the meshing part of the tooth surface, the reinforcing layer is of a double-layer structure consisting of a bottoming layer in contact with the base body and a tooth surface reinforcing layer, the thickness of the reinforcing layer is 2.2-2.5 mm, the tooth surface reinforcing layer is clad by alloy powder which is T15 high-speed steel and rare earth modified powder formed by that 0.2-0.3% of rare earth elements is added to T15 high-speed steel alloy powder, the thickness of the bottoming layer is 0.5-0.8mm, the cladding alloy powder is a mixture of 507Mo and the T15 high-speed steel and rare earth modified powder, and the mass mixing ratio of the 507Mo to the T15 high-speed steel and rare earth modified powder is 3:7. The trial running assessment of the crawler vehicle with the driving wheel gear ring reinforced by laser cladding for 6000 kilometers shows that the service life is 1.5-2 times of that of the driving wheel gear ring produced by the traditional medium frequency induction quenching technology.

The invention relates to a wave-shaped lip oil seal with backflow stripes at a lip opening and a three-dimensional modeling method. Inclined outwards convex backflow stripes are arranged at the lip opening part of the wave-shaped lip oil seal; the oil seal integrates the advantages of the wave-shaped lip oil seal and the backflow stripe oil seal; specific good dynamic pressure performance of the wave-shaped lip oil seal is realized; the characteristic of good oil pumping effect of the backflow stripe oil seal is reserved; the problem of poor abrasion resistance of the lip opening of the wave-shaped lip oil seal is also solved. The oil seal three-dimensional modeling method based on a circumferential uncoiling conversion principle provided by the invention has the advantages that the wave-shaped lip oil seal precise three-dimensional solid modeling problem difficult to be completed by the existing CAD (computer-aided design) software is changed into a relatively simple half three-dimensional oil seal solid model modeling problem capable of being easily realized by the existing CAD software; conditions are provided for the design manufacturing and the simulation analysis of the wave-shaped lip oil seal; wide application values are realized.

The invention provides a polyimide fiber sizing process. The sizing process includes spinning, pretreatment, ultrasonic cleaning, sizing, microwave drying and winding. The present invention changes the microscopic morphology of the polyimide fiber surface through the lye in the pretreatment tank, so that the imide bonds are partially opened, increasing the roughness and active groups on the fiber surface, and then utilizing the effective functional groups in the sizing agent to open The physical and chemical reaction of the imide bond will strengthen the interface bonding performance between the polyimide fiber and the sizing agent, and improve the value of the later application of the fiber.

The invention discloses a transparent antifogging agent, which is SiO modified by organosilane 2 Composition of sol and polyvinyl alcohol aqueous solution, organosilane-modified SiO 2 The mass ratio of the sol to the polyvinyl alcohol aqueous solution is 1:10~1, wherein the organosilane-modified SiO 2 The sol is prepared from ethyl orthosilicate and absolute ethanol under the action of alkali catalyst ammonia water. The invention also discloses a preparation method of the transparent antifogging agent. The transparent antifogging agent of the present invention has low cost and simple preparation process steps, enhances the water vapor erosion resistance of the antifogging film, improves the antifogging durability, and greatly improves the mechanical strength of the antifogging film.