A pump-controlled cylinder indirect hydraulically driven fuel switch valve and its control method
A technology of hydraulic drive and valve opening and closing, applied in the fuel valve of turbine/propulsion device, engine components, turbine/propulsion fuel delivery system, etc., can solve the problems of high driving voltage, limited operating speed, weak influence ability, etc. Achieve fast response, improve reliability, and reduce overall weight
Active Publication Date: 2022-04-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
Although the traditional electromagnet-driven fuel valve has a simple structure and is easy to adjust, it has weak resistance to environmental influences such as electromagnetic and heat. Especially when driving a large-flow fuel valve, it needs to overcome the large volume and weight of the spool hydraulic force, which seriously limits its performance. Operating speed
When the output output force and formation are large, its driving voltage is high, and long-term exposure to high voltage excitation will also cause the electromagnet to heat up and have a nonlinear impact on its output characteristics
Method used
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[0046] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0047] This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
[0048] like figure 1 As shown, the invention discloses a pump-controlled cylinder indirect hydraulically driven fuel switch valve, which includes a pump, a main valve body, a main valve core, a hydraulically driven rod, an active unloading valve and an overflow valve.
[0049] like figure 2 As shown, the pump includes a pump body, a first piezoelectric stack, a piston, a preload bolt, a preload spring and a baffle;
[0050] The pump body is a hollow cylinder with one end open and o...
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The invention discloses a pump-controlled cylinder indirect hydraulically driven fuel switch valve and a control method thereof. The fuel switch valve includes a pump, a main valve body, a main valve core, a hydraulic drive rod, an active unloading valve and an overflow valve; The pump includes a pump body, a first piezo stack, a piston, a preload bolt, a preload spring, and a baffle. The present invention utilizes a hydraulic power device to amplify the indirect driving force of medium isolation, and amplifies the high-frequency piezoelectric driving ability to push the fuel valve spool to move; the single-stage design can greatly simplify the structure and reduce the total weight of the valve to a certain extent. It can also improve the reliability of the valve; in addition, the present invention has a direct connection structure without intermediate pipelines, and the response speed is fast.
Description
technical field [0001] The invention relates to the technical field of fluid control valves, in particular to a pump-controlled cylinder indirect hydraulically driven fuel switch valve and a control method thereof. Background technique [0002] As one of the important control components in the fuel system of aero-engines, the on-off valve is often used to open and close the oil circuit. Although the traditional electromagnet-driven fuel valve has a simple structure and is easy to adjust, it has weak resistance to electromagnetic, thermal and other environmental influences. Especially when driving a large-flow fuel valve, it needs to overcome the large volume and weight of the valve core due to its large volume and weight, which seriously limits its performance. Action speed. When the output force and formation are large, its driving voltage is high, and long-term exposure to high voltage excitation will also cause the electromagnet to heat up and have a nonlinear impact on ...
Claims
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IPC IPC(8): F02C7/232
CPCF02C7/232
Inventor 王彬朱有坤
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS