The invention belongs to the field of mechanical hydraulic pressure, and discloses an automatic excess pressure protection type aircraft brake combination valve which comprises an electro-hydraulic pressure servo valve and an electromagnetic hydraulic lock structure, the electromagnetic hydraulic lock structure is provided with double electromagnetic valves, and the electric input control of the first electromagnetic valve is connected with an airborne system; the electric input of the second electromagnetic valve is in control connection with the electro-hydraulic pressure servo valve, after the first electromagnetic valve and the second electromagnetic valve are powered on, the electro-hydraulic pressure servo valve is opened for oil feeding, after the electro-hydraulic pressure servo valve is powered off, the second electromagnetic valve is powered off synchronously, and the electro-hydraulic pressure servo valve is powered off for oil feeding. When a brake of an airplane is loosened, the electro-hydraulic pressure servo valve is powered off, and the interior of the brake combination valve can automatically cut off an oil inlet channel of the electro-hydraulic pressure servo valve, so that the oil inlet channel does not output pressure any more, any possible excess pressure fault of the brake combination valve can be avoided, any control of an airborne system is not needed, and automatic excess pressure protection is achieved. The hydraulic control brake combination valve can greatly protect an airplane, avoids the major fault of airplane wheel tire dragging explosion caused by the excessive pressure fault of the brake combination valve, improves the safety of the airplane, and also increases the application scenarios of the hydraulic control brake combination valve.
本发明属于机械液压领域,公开了一种自动余压保护式飞机刹车组合阀,包括电液压力伺服阀和电磁液压锁结构,其中,电磁液压锁结构设有双重电磁阀,第一重电磁阀的电输入控制连接机载系统,第二重电磁阀的电输入控制连接电液压力伺服阀,第一重电磁阀和第二重电磁阀均通电后,打开电液压力伺服阀进油,电液压力伺服阀下电后第二重电磁阀同步下电,关闭电液压力伺服阀进油。当飞机松刹时,电液压力伺服阀下电,刹车组合阀内部会自动切断电液压力伺服阀进油通道,使其不再输出压力,可避免刹车组合阀出现任何可能的余压故障,且不需要机载系统进行任何控制,实现自动余压保护。可以极大地保护飞机,避免在刹车组合阀出现余压故障时引发机轮拖胎爆破的重大故障,提高飞机安全性,也增加了液控刹车组合阀的应用场景。
Automatic excess pressure protection type airplane brake combination valve
一种自动余压保护式飞机刹车组合阀
2023-04-07
Patent
Elektronische Ressource
Chinesisch
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