The invention discloses an asymmetric reversing valve, a load control unit and a rail transit braking system and aims to solve the problems that an existing rail transit braking system is controlled by an electromagnetic valve, the cost of the electromagnetic reversing valve (or a proportional pressure reducing valve) is high, the control logic of a vehicle can be increased, the reliability of the electromagnetic valve depends on the electrical performance of the electromagnetic valve, and the reliability of the electromagnetic valve is influenced. And the reliability is low. The asymmetric reversing valve is used for asymmetrically and selectively communicating two air inlets with an outlet, the load control unit is used for the rail transit braking system, and the load control unit is used for comparing the pressure difference between a constant pressure source and an air spring through the asymmetric reversing valve; and the load control unit generates an air pressure signal source of the pneumatic control braking unit according to the asymmetric comparison of the asymmetric reversing valve. When the air spring works normally, the device can select proper braking force according to the load of the air spring, and can also select the maximum braking force for emergency braking after the air spring fails.
本发明公开了一种非对称换向阀、载荷控制单元和轨道交通制动系统,旨在解决现有的轨道交通制动系统采用电磁阀控制,电磁阀换向阀(或比例减压阀)的成本高,并且会增加车辆自身的控制逻辑,且电磁阀的可靠性依赖其电气性能,可靠性较低的不足。该发明包括对于两个进气口非对称选择连通出口的非对称式换向阀、用于轨道交通制动系统的载荷控制单元和用于轨道交通制动系统,载荷控制单元通过非对称式换向阀比较恒定压力源与空气弹簧之间的压差,载荷控制单元根据非对称换向阀非对称式的比较产生气控制动单元的气压信号源。该装置在空气弹簧正常工作时,能够根据空气弹簧的负荷选择合适的制动力,在空气弹簧失效后也能选择最大制动力紧急刹车。
Asymmetric reversing valve, load control unit and rail transit braking system
一种非对称换向阀、载荷控制单元和轨道交通制动系统
18.04.2025
Patent
Elektronische Ressource
Chinesisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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