A multi-gas path averaging valve

A multi-gas path and averaging technology, applied in the direction of multi-way valves, lift valves, valve details, etc., can solve the problems of piston precision errors, large arithmetic mean deviations, and large errors, so as to achieve low machining accuracy requirements and avoid concentricity Excessive deviation and good concentricity
CN107289150BActive Publication Date: 2019-08-27CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
Publication Date
2019-08-27

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Abstract

The invention discloses a mean valve with multiple air circuits. The mean valve comprises a valve body, a valve seat and a mean piston. A valve cavity is formed in the valve body, the mean piston is arranged in the valve cavity, and the mean piston comprises a piston rod and a plurality of piston bodies, wherein the piston rod is sleeved with the piston bodies, the piston bodies are fixedly arranged on the piston rod, and the areas, under the air pressure action, of the piston bodies are equal. The sides, close to the valve seat, of the piston bodies and the inner wall of the valve body form pressure cavities only communicated with an air pressure inlet channel, and the pressure cavity formed by the side, close to the valve seat, of each piston body and the inner wall of the valve body is connected with a mean pressure outlet. The mean valve is suitable for the mean of two- or more-channel air spring pressure, and it is avoided that when two- or more-channel air spring pressure is processed, a plurality of mean valves need to be connected in parallel or in series, and consequently errors are caused; the concentricity is better, the situations that the friction between the piston and the wall surface of the valve body is enlarged due to overlarge deviations of the concentricity, and the resistance is increased, so that valve action is out of order are avoided.
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Description

technical field

[0001] The invention relates to the technical field of rail vehicle brake air pressure control valves, in particular to a multi-air path averaging valve. Background technique

[0002] The emergency braking force of the rail transit vehicle changes with the change of the load. If the load distribution of the car body is uneven, the real load situation cannot be obtained through the pressure of an air spring. Therefore, in order to weaken the impact of the uneven load, the train brake The control system controls the emergency braking force according to the average pressure of multiple air springs. The averaging valve is mainly used in EMUs and urban rail vehicles. It is a key component of the air suspension control equipment. It can arithmetically average the independent pressure of the air spring, and the output pressure is used as the basis for the brake control system to calculate or adjust the braking force.

[0003] At present, the average valves used in ...

Claims

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