GrabCAD 模型信息
Air Valve PU-7 · 模型 309356
The PU-7 pressure-reducing valve is a controllable unit designed to supply compressed air—At a reduced pressure—To the control chamber of the UPO-3/2 pressure-reducing accelerator, which facilitates the pneumatic operation of the main landing gear wheel brakes. The air pressure is reduced from (5 + 0.4) MPa [(50 + 4) kgf/cm²] to a range of 0 to 1.1 MPa (11 kgf/cm²), depending on the force applied to the PU-7 control lever. The internal volume of the housing is divided by exhaust and intake valves, along with a piston equipped with a diaphragm, into two chambers: a high-pressure chamber A (upstream of the intake valves) and a low-pressure chamber B (downstream of the intake valves). When the pneumatic system is being charged, the moving components of the PU-7 valve assume an initial position in which the control cavity of the UPO-3/2 unit is vented to the atmosphere. The valve is designed for the pneumatic control of the wheel brakes on the main landing gear and provides for: - Engagement of the brakes; - Increasing or decreasing braking effectiveness; - Disengagement of the brakes by exhausting the air. Model was created in Siemens NX.
- 格式
- Text file、STEP / IGES、Rendering
- 分类
- Aviation、Industrial design、Machine design
- 标签
- aviation、plane、jet、helicopter、nx、flow、air pressure、air、pressure-reducing valve、pneumatic control
- 数据更新
- 2026-11-09T02:34:55Z
