The hydraulic folding and unfolding system capable of locking the required position of the undercarriage at will is reliable in movement and control precision and can be reliably locked at the required position. According to the technical scheme, in the process of locking the undercarriage at any position, in two hydraulic electromagnetic reversing valve reversing loops in mirror symmetry, one branch flow-direction liquid path is respectively communicated with rodless cavities of the inner and outer retracting actuating cylinders and the up and down retracting and releasing buffering actuating cylinders through a one-way hydraulic control sequence one-way valve set composed of a one-way sequence spring valve A and a one-way sequence spring valve B which are stacked and connected in series and in parallel through a branch; the other branch flow-direction liquid path is respectively communicated with respective actuating cylinders through respective actuating cylinder hydraulic lock control loops; a piston rod of the actuating cylinder is driven to extend; through in-place signals given by internal and external retracting displacement detection sensors and up and down retracting displacement detection sensors on respective piston bypasses, internal and external retracting and releasing actuating cylinders and up and down retracting and releasing buffering actuating cylinders are controlled at required positions. According to the invention, the control precision and the working reliability are effectively improved.
本发明公开的一种任意锁定起落架需要位置的液压收放系统,运动和控制精度可靠,并在需要位置可靠锁定。本发明通过下述技术方案实现:在任意位置锁紧起落架的过程中,两个镜像对称的液用电磁换向阀换向回路通过一支流向各自叠加串并联的单向顺序弹簧阀A、单向顺序弹簧阀B组成的单向液控顺序单向阀组,分别连通各自的内外收作动筒和上下收放缓冲作动筒的无杆腔;另一支流向液路通过各自的作动筒液压锁控制回路,分别连通各自的收作动筒;驱动作动筒活塞杆伸出;通过各自活塞旁路上的内外收位移检测传感器和上下收放位移检测传感器给出的到位信号,在需要位置控制内外收放作动筒和上下收放缓冲作动筒。本发明有效地提高了控制精度及工作的可靠性。
Hydraulic folding and unfolding system capable of randomly locking required position of undercarriage
任意锁定起落架需要位置的液压收放系统
23.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |
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