First, learn about the frame diagram of the stability relief valve. The relief valve is mainly composed of the main valve Mainpoppet and the pilot valve Pilotpoppet, both of which are cone valves. The spring of the main valve is very loose, and most parts can be shrunk when separated, but the spring of the pilot valve is a little hard, and it must be adjusted with special tools to change its shrink amount. Parker cycloid hydraulic motor There is a damping hole between the main oil passage P and the control oil passage X

Mark the plan.

The remote operation of the system software pressure can be completed according to the connection of the always moving relief valve at the control oil hole of the main valve. If Bulgarian cycloid motor If the pressure setting of the remote control pressure regulating valve is less than the pressure setting of the pilot valve, the system software pressure is determined by the direct moving relief valve; If the set value is high, it may be decided by the pilot valve

In the following design scheme, the remote control pressure regulating valve is composed of three groups, and the pressure setting value of the overflow valve is less than that of the main valve pilot valve. When all the relays are powered on, the pressure in the system software will be determined. In the figure, the safety pressure obtained by the system software is 3000PSI.

In the following example, when the relay is powered on, the pilot valve spring loads the side bypass, which allows the system software pressure to drop to about zero when the overflow valve is working, such as the relief valve

Some relief valves allow the system pressure to be automatically controlled according to the pressure on the side of the operating spring. In the example shown in the figure, Low speed cycloidal hydraulic motor The oil discharge hole in the main relief valve is blocked. When the relay is not energized, the system software pressure is still determined by the main valve; When the relay is powered on, the system software pressure will be the sum of the setting of the main valve spring and the setting pressure of the remotely operated overflow valve.