The invention discloses a low-leakage high-response high-reliability pressure servo valve which comprises a torque motor, a valve body, a sliding valve, a reset spring, an oil inlet nozzle, an oil return nozzle and a baffle, the oil inlet nozzle is tightly attached to the baffle at the zero position, and an initial distance exists between the oil return nozzle and the baffle. The nozzle control cavity pressure and the working oil port pressure act on the left end and the right end of the sliding valve respectively, the rod diameter of the sliding valve is adjusted to enable the acting areas of the two ends to be unequal, the purpose of controlling the high working oil port pressure through the low nozzle control cavity pressure is achieved, and the response speed of the pressure servo valve is increased. A reset spring is installed at the right end of the sliding valve, the sliding valve is pushed to the leftmost end position at the zero position, the working oil port is communicated with the oil return port, and the safety protection function is achieved. According to the double-nozzle baffle pressure servo valve, the problem of conflict between low leakage and high response of an existing double-nozzle baffle pressure servo valve can be solved, and the development goals of low leakage, high response and high reliability are achieved.
本发明专利公开了一种低泄漏高响应高可靠性压力伺服阀,所述压力伺服阀包括力矩马达、阀体、滑阀、复位弹簧及进油喷嘴、回油喷嘴和挡板组成,进油喷嘴在零位时紧贴挡板,回油喷嘴与挡板存在初始间距,通过设计阀体内部流道,令喷嘴控制腔压力和工作油口压力分别作用于滑阀左右两端,调节滑阀杆径使两端作用面积不等,达到利用较低喷嘴控制腔压力控制较高工作油口压力的目的,提高了压力伺服阀的响应速度。滑阀的右端安装有复位弹簧,在零位时将滑阀推到最左端位置,将工作油口与回油口连通,实现安全保护功能。本发明专利可解决现有双喷嘴挡板压力伺服阀低泄漏与高响应矛盾冲突的问题,实现了低泄漏、高响应、高可靠性的发展目标。
Low-leakage high-response high-reliability pressure servo valve
一种低泄漏高响应高可靠性压力伺服阀
2023-03-28
Patent
Electronic Resource
Chinese
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