Pressure regulating valve

Abstract

The invention relates to a pressure regulating valve comprising a valve body 1, a ball 2, a spring guide bush 7, a spring 5, and a blind nut 6. The valve body 1 is tubular. One side of the valve body 1 is provided with an internal thread and the spring guide bush 7, and the other side of the valve body 1 is provided with a step. The large diameter part of the step is close to the internal thread. The step is provided with a hole close to the small diameter part. The outside of the bottom of the spring guide bush 7 is provided with a tightening structure 8. The ball 2 is locked to the step. The spring 5 is respectively abutted between the ball 2 and the spring guide bush 7. The thread of the spring guide bush 7, exposed out of the valve body 1, is sequentially provided with a lock nut 4 and the blind nut 6. The bottom of the blind nut 6 is closed. The pressure regulating valve is simple in structure and reliable in performance and can be precisely controlled through calculation, inner lubricating oil pressure of a system can be controlled, and the inner lubricating oil pressure of the system can be kept stable after long-term operation or when the external environment changes.

Description

technical field [0001] The invention relates to a pressure regulating valve, in particular to a pressure regulating valve capable of ensuring stable pressure under pressure fluctuations. Background technique [0002] The pressure regulating valve is a commonly used pressure regulating device in the mechanical lubrication system. Its working principle is to control the pressure regulating valve through the spring force to open the pressure. As the working time of the pressure regulating valve increases, the elastic modulus of the spring decreases, and the load-bearing capacity of the spring decreases, resulting in large fluctuations in the outlet pressure of the lubricating oil pump, which cannot guarantee the lubricating capacity requirements of the reducer. At the same time, due to changes in the external environment, such as when the helicopter performs flight missions in plateau areas, the lubricating oil pressure drop of the lubricating oil pump is more obvious, and the ...

AI Technical Summary

Problems solved by technology

With the increase of the working time of the pressure regulating valve, the elastic modulus of the spring decreases and the bearing capacity of the spring decreases, resulting in large fluctuations in the outlet pressure of the lubricating oil pump, which cannot guarantee the lubricating capacity requirements of the reducer

At the same time, due to changes in the external environment, such as when the helicopter performs flight missions in plateau areas, the lubricating oil pressure drop of the lubricating oil pump is more obvious, and the pressure regulating valve works at the original set pressure, which cannot guarantee the use requirements. A pressure regulating valve that can control the lubricating oil pressure in the system to ensure stable pressure

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