What is a pressure relay and what is its working principle?

Pressure relay It is an element in the hydraulic transmission system that makes the electric contact act when the fluid pressure reaches a predetermined value. Pressure relay is also defined as a hydraulic component that converts pressure into electrical signal. Customers can output an electrical signal at a set pressure by adjusting the pressure relay according to their own pressure design needs.

working principle

1. When first used for safety maintenance, (relay manufacturer) will Pressure relay It is arranged at one end of the clamping hydraulic cylinder. After the hydraulic pump runs, first clamp the product workpiece. At this time, the working pressure in the right chamber of the clamping hydraulic cylinder rises. When the adjustment time constant of the pressure relay rises,Pressure relay The posture of the will send an electronic signal, causing 2ya to plug in and drill the hydraulic cylinder.

2. During production and processing,Pressure relay The delay relay of the toggle switch is closed all the time. If the product workpiece is not clamped, the pressure relay 2 will be cut off, so 2ya will turn off the power supply and the drilling hydraulic cylinder will immediately stop cutting, so as to prevent safety accidents caused by drilling the product workpiece.

3. When the hydraulic pump is used for the sequence and posture of operating parts, after the hydraulic pump runs, first insert 2ya, and the left chamber of the hydraulic cylinder enters the liquid to promote the piston to move to the right. When the limit switch (or dead stop iron) is encountered, the working pressure of the system software rises, and the pressure relay sends an electronic signal to plug 1ya into the power supply, and the high-pressure oil enters the left chamber of the hydraulic cylinder to promote the piston to move to the right. At this time, if 3YA is also plugged in, the piston of the hydraulic cylinder will move rapidly to the right. If 3YA turns off the power supply, the piston of the hydraulic cylinder will slowly move to the right, and its slow fitness speed will be adjusted by the overflow valve.

4. When it is used for pressure relief of hydraulic pump,Pressure relay Instead of operating the hydraulic pump to stop rotation, operate the two position two-way relay to discharge the working pressure oil output by hydraulic pump 5 back to the vehicle oil tank to relieve pressure.

5. Finally, when the hydraulic pump is opened and closed, there are two hydraulic pumps, high-pressure small total flow pump and bottom pressure large flow pump. When the piston drops rapidly, two pumps output another working pressure oil. When the piston rod of the hydraulic cylinder gradually pressurizes the product workpiece, the pressure relay transmits the posture under the action of the working pressure oil, moves the toggle switch, cuts off the normally closed point and stops the hydraulic pump. In the production process, slow down the speed of the hydraulic cylinder and reduce the driving force consumption.