The invention discloses a walking throttle brake valve of a wheel type hydraulic excavator. The brake valve comprises an oil way communicated with an inlet and an outlet. The oil way is divided into amain oil way and an overflow oil way which are connected in parallel in the valve body. A main throttle valve is installed in the main oil way. An overflow valve is installed in the overflow oil way.The flow of the main oil way is controlled through the main throttle valve. The overflow valve opens the overflow oil way under the action of oil pressure when the inlet oil pressure reaches a certain threshold value. According to the application of the brake valve, the potential energy of a vehicle from the slope top to the slope bottom is converted into heat energy by a walking motor during downhill, and the heat energy is brought to a radiator through hydraulic oil. The potential energy of the vehicle is converted into heat energy and taken away by hydraulic oil, so that over-high temperature of a brake drum due to long-time operation of a service brake is avoided, and the problem of brake failure caused by severe heating of the brake drum due to long-time action is solved.
本发明公开了一种轮式液压挖掘机行走节流制动阀,包括连通入口和出口的油路,油路在阀体中分为主油路和溢流油路并联的两条,主油路中安装主节流阀,溢流油路中安装溢流阀,通过主节流阀控制主油路流量,当入口油压达到一定阀值时,溢流阀在油压作用下打开溢流油路。本制动阀的应用将下坡时车辆从坡顶到坡底的势能由行走马达转换为热能,通过液压油把热量带到散热器。车辆的势能转换成热能的形式通过液压油带走后,避免长时间操作行车制动器使制动鼓温度过高,解决了制动鼓因长时间作用发热严重导致制动失效的问题。
Walking throttle brake valve of wheel type hydraulic excavator
一种轮式液压挖掘机行走节流制动阀
2020-04-24
Patent
Elektronische Ressource
Chinesisch
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