ep valve control device for subway braking system
A braking system, valve control technology, applied in the direction of hydraulic braking transmission, etc., can solve the problem of high machining accuracy requirements, and achieve the effects of rapid response, high control accuracy and small overshoot
Active Publication Date: 2015-12-23
NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD
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Problems solved by technology
[0002] The EP valve device is one of the key components of the subway braking system. At present, the proportional electropneumatic valve is used on some trains. By controlling the current of the proportional electropneumatic valve, the proportional air pressure is obtained. Due to the electric / force of the electropneumatic valve The output link is open-loop, and there is a hysteresis loop, which requires high machining accuracy, and also has certain requirements for on-site maintenance work
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[0010] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. It should be noted that the drawings are all in very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0011] Such as figure 1 As shown, the EP valve device of the subway braking system of the present invention comprises: a microcomp...
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An electro-pneumatic (EP) valve control device used in a metro braking system comprises a pressure sensor, a braking high speed switch valve, a remission high speed switch valve and a microcomputer controller which integrates a control strategy. A current signal output end of the pressure sensor is connected with an analog signal input end of the microcomputer controller, output ends of the microcomputer controller are respectively connected with voltage signal input ends of the remission high speed switch valve and the braking high speed switch valve, an air outlet of the remission high speed switch valve is communicated with the air, an air inlet of the braking high speed switch valve is connected with an air cylinder, and an air inlet of the remission high speed switch valve, an air outlet of the braking high speed switch valve and a pressure input port of the pressure sensor are communicated with a pressure control input port of a relay valve. According to the EP valve control device used in the metro braking system, pressure in a volume chamber is fed back to the microcomputer through the pressure sensor, the analog signal is output after the pressure is calculated by the control strategy in the microcomputer, the analog signal drives two high speed valves to inflate air and drain air, corresponding pressure air is output from the volume chamber to brake in an analog mode, and a closed-loop control is formed.
Description
technical field [0001] The invention relates to an EP valve control device for a subway braking system. Background technique [0002] The EP valve device is one of the key components of the subway braking system. At present, the proportional electropneumatic valve is used on some trains. By controlling the current of the proportional electropneumatic valve, the proportional air pressure is obtained. Due to the electric / force of the electropneumatic valve The output link is open-loop, and there is a hysteresis loop, which requires high machining accuracy and certain requirements for on-site maintenance work. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an EP valve control device for a subway braking system, which can quickly and accurately adjust the output pressure in the braking system. [0004] In order to solve the above technical problems, the...
Claims
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IPC IPC(8): B60T11/10
Inventor 鲁进军杨磊田爱凤杨正专
Owner NANJING CRRC PUZHEN HAITAI BRAKE EQUIP CO LTD