Composite brake pad for motor train unit with speed per hour of 200-250km/h

Abstract

The invention discloses a composite brake pad for a motor train unit with the speed per hour of 200-250 km / h. A friction body comprises 8-10% of butyronitrile rubber, 0.5-1% of rubber accelerator, 0.5-1% of sulfur, 0.3-0.5% of stearic acid, 8-10% of high-temperature-resistant boron modified resin, 3-5% of butyronitrile rubber powder, 6-8% of barium sulfate, 3-5% of molybdenum disulfide, 2-3% of coke powder, 2-3% of silicon carbide, 4-6% of reduced iron powder, 3-5% of chromium ore powder, 2-3% of antimony sulfide, 3-5% of mica powder,1-2% of iron oxide black, 3-5% of aluminum silicate, 8-10% of basalt fiber, 8-10% of collagenous fiber, 4-6% of aramid fiber, 3-5% of steel fibers and 3-5% of carbon fibers. The preparation method comprises the steps of open milling, banbury mixing, pressing, heat treatment and the like. According to the scheme, the composite brake pad is light in specific gravity, good in physical performance and free of thermal damage to wheels; energy conservation and environmental protection are greatly improved; and the composite brake pad also has excellent temperature resistance, heat fading resistance, good heat restorability and excellent friction performance.

Description

technical field [0001] The invention belongs to the technical field of brake devices for high-speed railways, and in particular relates to a composite brake pad for a train set with a speed of 200-250 km / h. Background technique [0002] In 2008, my country's first high-speed railway was put into operation; at the end of 2015, my country's high-speed railway operation mileage ranked first in the world. High-speed railways have changed my country's transportation pattern and brought more convenience and surprises to people's lives. At present, the operating speed of my country's high-speed railway has reached 300-350km / h or even higher, but as a railway operation network with a speed of 200-250km / h for quasi-high-speed trains, the brake pads used in my country's high-speed railway basically use metal sintered high-speed Brake pads and metal brake pads have the following disadvantages, such as large specificity, poor physical properties, and serious thermal damage to the wheels...

AI Technical Summary

Problems solved by technology

At present, the operating speed of my country's high-speed railway has reached 300-350km / h or even higher, but as a railway operation network with a speed of 200-250km / h for quasi-high-speed trains, the brake pads used in my country's high-speed railway basically use metal sintered high-speed Brake pads and metal brake pads have the following disadvantages, such as large specificity, poor physical properties, and serious thermal damage to the wheels; poor high temperature resistance, easy deformation, large braking noise, and unstable performance of the decomposition residue of the friction layer; There is a problem of poor heat decay resistance, etc.