Copper alloy composite material containing nano-particles

Abstract

The invention belongs to the metallurgy material domain, specially involves uses in to make east the hydraulic pump to seal contains a nanometer pellet which the static link uses the copper alloy compound material. The compound material chemical composition ingredient (weight %) is: The graphite 1-5%, the particle size for is smaller than 70 microns; Nanometer nickel 1-5%, average grain diameter 40-60nm; The aluminum oxide 1-5%, average grain diameter 140-160nm, in which is smaller than 100nm to occupy 15-17%; The remainder is 6-6-3 copper alloy, the particle size for is smaller than 70 microns. The invention and the existing technology compare has the machinery mildly high, the wear-resisting anti-friction nature good, the seal effect is good, life long merit. Moves with this invention material manufacture hydraulic pressure pump spindle tail seals the static link, the acceleration length-of-life test 130 hours, its average spillage for is not bigger than 0.0076ml / h, after the test run decomposes pumps the inspection, the static link packing surface not visual obviously wears, with soaks the copper graphite material compared to, enhances in a time of situation in the practical work ability, the average spillage reduces nearly 20 times.

Description

technical field [0001] The invention belongs to the field of metallurgical materials, and in particular relates to a copper alloy composite material containing nanoparticles used for manufacturing hydraulic pump dynamic seal and static rings. Background technique [0002] In the prior art, mechanical seals (also known as end face seals, collectively referred to as dynamic seals) are widely used in various industrial fields. In the rotating mechanical dynamic sealing device, more than 90% are mechanical seals, that is, the end faces of the dynamic and static rings are close to each other and the sealing is realized by relative frictional movement. Therefore, the material selection of the friction pair of the dynamic and static rings and its tribological behavior are very important, which directly affect the leakage rate and seal life. [0003] Oil leakage is one of the main disadvantages of hydraulic transmission and control technology, and eliminating leakage is an importan...

AI Technical Summary

Problems solved by technology

However, due to the uneven distribution and different sizes of pores in graphite, the impregnated metal is unevenly distributed. The place with metal is more wear-resistant, but the metal is too concentrated and it is easy to wear the grinding material; where there is no metal, only graphite, is not wear-resistant

During the assembly and test run, it was found that copper-impregnated graphite is not easy to break in, the sealing pressure adjustment range is narrow, the pass rate of the dynamic and static pressure test of the hydraulic pump is low, and repeated troubleshooting is required, resulting in longer production cycles and unstable product quality.