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Novel material of sliding valve pair for railway vehicle brake valve

A technology for railway vehicles and sliding valve pairs, which is applied in the direction of sliding valves, valve devices, engine components, etc., can solve the problems of difficult training, large maintenance, and inability to disassemble and repair, so as to reduce the workload and difficulty of training and improve the service life , The effect of reducing the amount of training

Active Publication Date: 2015-06-10
MEISHAN CRRC BRAKE SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methyl silicone oil used as lubricating oil will be exhausted when the existing spool valve pair is used for a long time, which will form a similar "dry grinding". Moreover, in the existing spool valve pair, the spool valve sleeve is soft and the spool valve is hard. , the spool valve sleeve is usually strained and peeled off before the spool valve, and the function is lost, while the spool valve sleeve is press-fitted on the brake valve body, and it will be scrapped after disassembly, so it cannot be disassembled for maintenance. Because the spool valve sleeve is relatively soft, Large wear, coupled with the large friction area of ​​the slide valve sleeve and the influence of the structural shape, so the amount of maintenance is large and the maintenance is difficult. In addition, due to the high hardness of the slide valve, its training is also very difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A spool valve pair for a railway vehicle brake valve, comprising a spool valve and a spool valve sleeve, wherein the material of the spool valve sleeve is a copper alloy with added tin, lead, and zinc containing the following mass percentages: Zn: 2.1% , Sn: 6.9%, Pb: 6.1%, Cu: 84.9%; the slide valve material is a copper alloy containing tin, lead, and zinc with the following mass percentages: Zn: 8.1%, Sn: 3.9%, Pb: 7.1%, Cu: 80.9%.

[0021] Both the slide valve sleeve and the slide valve are formed by direct casting.

[0022] The hardness of the obtained slide valve sleeve was 110HBW, and the hardness of the slide valve was 75HBW.

Embodiment 2

[0024] A spool valve pair for a railway vehicle brake valve, including a spool valve and a spool valve sleeve, wherein the material of the spool valve sleeve is a copper alloy with tin, lead, and zinc added with the chemical composition of the following mass percentages: Zn: 3.9% , Sn: 6.1%, Pb: 7.9%, Cu: 82.1%; the slide valve material is a copper alloy containing tin, lead, and zinc with the following mass percentages: Zn: 12.9%, Sn: 2.1%, Pb: 7.9%, Cu: 77.1%.

[0025] Both the slide valve sleeve and the slide valve are formed by a liquid die forging process.

[0026] The hardness of the obtained slide valve sleeve was 116HBW, and the hardness of the slide valve was 90HBW.

Embodiment 3

[0028] A spool valve pair for a railway vehicle brake valve, including a spool valve and a spool valve sleeve, wherein the material of the spool valve sleeve is a copper alloy with tin, lead, and zinc added with the following mass percentages: Zn: 3.6% , Sn: 7.9%, Pb: 7.4%, Cu: 81.1%; the slide valve material is a copper alloy containing tin, lead, and zinc with the following mass percentages: Zn: 13.9%, Sn: 2.3%, Pb: 6.1%, Cu: 77.7%.

[0029] Both the slide valve sleeve and the slide valve are formed by the combined process of "casting + extrusion / forging". After casting, extrusion or forging treatment can make the structure of the material more compact.

[0030] The hardness of the obtained slide valve sleeve was 130HBW, and the hardness of the slide valve was 83HBW.

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PUM

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Abstract

The invention discloses a novel sliding valve pair for a railway vehicle brake valve. The novel sliding valve pair comprises a sliding valve and a sliding valve sleeve which are both made of brand-new materials, so that abrasion resistance of the sliding valve pair is enhanced. The sliding valve is soft, the sliding valve sleeve is hard, the sliding valve sleeve is long in service life, and the sliding valve is easy and convenient to repair and maintain.

Description

technical field [0001] The invention relates to a slide valve pair for a railway vehicle brake valve and its material. Background technique [0002] The spool valve pair is composed of a spool valve sleeve and a spool valve. It is a key component of the brake valve of a railway vehicle. Its quality directly affects the running performance and safety of the train. Due to the long-term working condition of repeated friction, the slide valve pair formed by the slide valve and the slide valve sleeve is required to have good sealing performance on the joint surface, no air leakage, no leakage, wear resistance, durability, and easy training and maintenance. The methyl silicone oil used as lubricating oil will be exhausted when the existing spool valve pair is used for a long time, which will form a similar "dry grinding". Moreover, in the existing spool valve pair, the spool valve sleeve is soft and the spool valve is hard. , the spool valve sleeve is usually strained and peeled ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/30C22C9/00
Inventor 赵正雄
Owner MEISHAN CRRC BRAKE SCI & TECH CO LTD
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