Arc-triangle-shaped powder metallurgy brake pad for high-speed motor train unit

Abstract

The invention discloses an arc-triangle-shaped powder metallurgy brake pad for a high-speed motor train unit. The arc-triangle-shaped powder metallurgy brake pad for the high speed motor train unit comprises a steel back and friction blocks arranged on the steel back, the friction blocks are in the shape of an arc triangle with a straight edge, and the arrangement number of the friction blocks onthe brake pad is increased from an inner ring to an outer ring in sequence. Compared with the prior art, the arc-triangle-shaped powder metallurgy brake pad has the positive effects that 1, for the unique arc triangle structure with a round hole in the middle, the total side area is larger than that of other structures, the heat dissipation effect is good, and the brake temperature can be effectively reduced; 2, the reasonable arrangement of the positions of the friction blocks is realized, compared with other arrangement modes, the temperature difference between friction bodies of the inner ring and friction bodies of the outer ring is more uniform, and the consistency of the abrasion conditions of the friction blocks of the inner ring and the friction blocks of the outer ring is better;3, gaps between the friction blocks and the steel back are reasonably designed, so that the problem of framework deformation caused by too high braking temperature under a severe working condition issolved; and 4, the rotation of the friction blocks is effectively limited by means of the design of the two straight edges of each friction block and anti-rotation bosses, and the reliability of the friction blocks in the using process is improved.

Description

technical field [0001] The invention relates to an arc-triangular powder metallurgy brake pad for a high-speed EMU. Background technique [0002] Powder metallurgy brake pads, as an important part of the braking system of EMU trains, affect the safety, stability and comfort of EMU train operation. With the continuous increase of the running speed of EMU trains, the performance requirements of powder metallurgy brake pads are continuously improved, and the following problems often occur in the braking process of powder metallurgy brake pads: [0003] 1. The temperature of the friction body on the brake pad is high, and the thermal decay is accelerated, resulting in a decrease in friction performance; [0004] 2. The friction body temperature difference between the inner and outer rings of the brake pad is large, resulting in a large difference in the wear of each friction body; [0005] 3. The skeleton of the friction block is easily deformed during long-term service, resul...

AI Technical Summary

Problems solved by technology

[0003] 1. The temperature of the friction body on the brake pad is high, and the thermal decay is accelerated, resulting in a decrease in friction performance;

[0004] 2. The friction body temperature difference between the inner and outer rings of the brake pad is large, resulting in a large difference in the wear of each friction body;

[0005] 3. The skeleton of the friction block is easily deformed during long-term service, resulting in failure of the brake pad;

[0006] 4. The friction block rotates during the braking process, which affects the friction performance of the friction block and reduces the impact vibration performance of the friction block

[0007] 5. The friction block is prone to tilt due to the large braking force during use, resulting in serious eccentric wear of the friction block

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