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Wear-resistant brake-shoe friction body for railway truck and brake-shoe

A friction body, truck technology, applied in the direction of friction lining, gear transmission mechanism, mechanical equipment, etc., can solve the problems of reducing wheel protection, compressive strength, bending strength, impact strength, shortening service life, etc., to achieve stable friction coefficient, low elastic modulus, high compressive strength effect

Inactive Publication Date: 2017-02-15
CHONGQING YUHONG RAIL CAR ACCESSORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the friction bodies in the prior art cannot meet the needs of high-speed driving due to their low compressive strength, bending strength, and impact strength; Its service life, and there is a certain hidden danger to the safe driving of the vehicle; in addition, the damage to the wheel is also relatively large, which reduces the protective effect on the wheel

Method used

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  • Wear-resistant brake-shoe friction body for railway truck and brake-shoe
  • Wear-resistant brake-shoe friction body for railway truck and brake-shoe
  • Wear-resistant brake-shoe friction body for railway truck and brake-shoe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Prepare and weigh the components of the friction body: 9% nitrile rubber, 5% cashew nut shell oil modified phenolic resin, 6% steel fiber, 16% sepiolite fiber, 12% composite fiber, 16% barium sulfate, 15% iron powder, 8% graphite, 6% feldspar powder, 2% calcined bauxite, 2% accelerator, 1% stearic acid, and 1% sulfur, meeting the requirement that the sum of the mass of each component reach 100%.

[0053] 2) Mixing and granulation: add the above-mentioned components into the internal mixer according to their mass percentages, except sulfur, and get the premixed material after internal mixing heating, pressurization, internal mixing adjustment, and crushing in the internal mixer The internal mixer is heated for 12 minutes and adjusted for 5 minutes. During the process, the temperature is controlled at 90 ° C. After cooling and crushing, the premix is ​​obtained;

[0054] 3) Cool the premixed material after banburying to room temperature, weigh a certain weight and put ...

Embodiment 2

[0064] 1) Prepare and weigh the components of the friction body: 10% nitrile rubber, 6% cashew nut shell oil modified phenolic resin, 5% steel fiber, 18% sepiolite fiber, 11% composite fiber, 18% barium sulfate, 14% iron powder, 8% graphite, 6% feldspar powder, 1% calcined bauxite, 1% accelerator, 1% stearic acid, and 1% sulfur, meeting the requirement that the sum of the mass of each component reach 100%.

[0065] 2) Mixing and granulation: add the above-mentioned components into the internal mixer according to their mass percentages, except sulfur, and get the premixed material after internal mixing heating, pressurization, internal mixing adjustment, and crushing in the internal mixer The internal mixer is heated for 15 minutes and adjusted for 6 minutes. During the process, the temperature is controlled at 85 ° C. After cooling and crushing, the premix is ​​obtained;

[0066] 3) Cool the premixed material after banburying to room temperature, weigh a certain weight and put...

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Abstract

The invention discloses a wear-resistant brake-shoe friction body for a railway truck and the brake-shoe. The wear-resistant brake-shoe friction body for the railway truck is composed of 8-12% of nitrile rubber, 2-7% of cashew nut shell oil-modified phenolic resin, 5-9% of steel fibers, 16-19% of sepiolite fibers, 10-20% of composite fibers, 15-25% of barium sulfate, 14-19% of iron powder, 8-13% of graphite, 5-10% of feldspar powder, 1-3% of calcined bauxite, 1-3% of an accelerant, 1-3% of stearic acid and 1-3% of sulfur. The wear-resistant brake-shoe friction body for the railway truck is prepared by the steps of: performing mill mixing; performing plastifying; and performing crushing. The invention relates to the brake-shoe friction body which is stable in friction performance, good in wear resistance and small in environmental pollution. The brake-shoe friction body can be used in a railway high-speed truck, has a stable friction coefficient and relatively good wear resistance, and can satisfy the operating requirements that the highest operating speed is 120km / h and the axle load is not greater than 25t, of the truck; the friction body has relatively high compression strength, bending strength, impact strength and relatively low elastic modulus, and can prevent phenomena such as cracks, drop-dregs and drop-blocks, fracture and the like.

Description

technical field [0001] The invention belongs to train friction brake accessory parts, in particular to a wear-resistant brake shoe friction body and brake shoe for railway trucks. Background technique [0002] The "brake pads" used on trains are called "brake shoes". The brake shoes on the train are installed on the front and rear sides of the train wheel tread. When braking is required, the air brake is operated to give way to the two brake shoes at the front and rear of the wheel and clamp the wheel. The friction body of the brake shoe and the The treads of the wheels contact and generate friction. Under the action of friction, the kinetic energy of the train is converted into heat energy and dissipated into the air, which simultaneously slows down or stops the train. [0003] Brake shoes can be divided into cast iron brake shoes and synthetic brake shoes according to their materials. Synthetic brake shoes mainly include a shoe back and a friction body that are fixedly co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02
CPCF16D69/023F16D69/028F16D2200/0021F16D2200/0052F16D2200/006F16D2200/0086
Inventor 任昭红巨虹宗赵宏戌邱华
Owner CHONGQING YUHONG RAIL CAR ACCESSORIES CO LTD
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