Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Surface coating for hydraulic motor and preparing method

A surface coating, hydraulic motor technology, applied in coating, metal material coating process, heating inorganic powder coating and other directions, can solve problems such as poor thermal conductivity, cylinder failure, etc., to reduce friction coefficient, improve thermal conductivity, The effect of reducing heat and material loss

Inactive Publication Date: 2018-06-29
SEED TECH CORP LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to strengthen the base copper and reduce the coefficient of friction, the current bronze layer is a lead-strengthened bronze alloy. The lead-strengthened bronze alloy has poor thermal conductivity, which leads to premature failure of the cylinder block

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface coating for hydraulic motor and preparing method
  • Surface coating for hydraulic motor and preparing method
  • Surface coating for hydraulic motor and preparing method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The present invention also provides a method for preparing a surface coating for a hydraulic motor, comprising the following steps:

[0035] In terms of mass fraction, mix 10-12% tin powder, 0.25-2.0% graphene powder and the rest of the reduced copper powder, add ethanol, and perform ball milling, place the obtained ball mill on the surface of the cylinder, and press it Sintering is carried out under a reducing atmosphere to obtain surface coatings for hydraulic motors.

[0036] In the present invention, due to the unique two-dimensional structure of graphene, its specific surface area is 2630m 2 / g, more than carbon nanotubes, but the bulk density is extremely low (0.005g / cm 3 ), so it is difficult to prepare graphene-enhanced copper-tin alloys in conventional mixing.

[0037] In view of this, the present invention adopts the method of powder metallurgy to prepare the surface coating. Specifically, the powders of the raw materials can be mixed and then directly cover...

Embodiment 1

[0057] The proportioning of raw materials in this embodiment is shown in Table 1.

[0058] Mix the raw material powder, add ethanol, and use a horizontal planetary ball mill for ball milling for 2 hours at a speed of 50rpm. The ball milled powder is evenly placed on the surface of the hydraulic motor cylinder and the distribution plate, then pressed, and finally placed in a reducing atmosphere Sintering is carried out in a protected sintering furnace to obtain a graphene-enhanced copper-tin alloy coating.

Embodiment 2～5

[0060] Using the corresponding formula in Table 1, a graphene-strengthened copper-tin alloy coating was prepared according to the method in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
widthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a surface coating for a hydraulic motor. The surface coating is prepared through following components including, by mass percent, 10%-12% of tin, 0.25%-2.0% of graphene and thebalance copper. The sheet layer thickness of the graphene ranges from 0.35 nm to 10 nm, and the width of the graphene ranges from 20 microns to 400 microns. The graphene is added in bronze, the thermal conductivity of a bronze coating can be obviously improved, the friction coefficient between friction pairs can be effectively reduced through the graphene, and heat and material losses generated due to friction are effectively reduced. Accordingly, the service life of a cylinder is effectively prolonged, and the using performance of the cylinder is effectively improved. The experiment result shows that the thermal conductivity of the coating is 84-170 W / <m.k>, compared with the prior art, the friction coefficient is reduced by 15%, the instant highest temperature of the friction pair interface is reduced to 160 DEG C from near 200 DEG C, and temperature distribution is smoother compared with the prior art. The invention further provides the surface coating for the hydraulic motor.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal substrates, in particular to a surface coating for hydraulic motors and a preparation method. Background technique [0002] The hydraulic and pneumatic power machinery manufacturing industry occupies a very important position in the national economy. Hydraulic and pneumatic power machinery belongs to the basic parts of machinery, and most of the basic parts are moving parts, stressed parts, wearing parts and functional parts, which directly determine the performance, level, quality and reliability of the main engine and major technical equipment. The degree of hydraulic transmission has become one of the important symbols to measure a country's industrial level. For example, 95% of construction machinery, 90% of CNC machining centers, and more than 95% of automatic lines produced in developed countries use hydraulic transmission technology. Among them, construction machinery, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08
CPCC23C24/087
Inventor 徐跃华蔡明东
Owner SEED TECH CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com