Buffer device of four-column hydraulic press

Buffer device of four-column hydraulic press

1. Gap type buffer device: This kind of device produces a large buffer braking force at the beginning of the buffer, but it will drop down quickly, and it will not work in the end, the buffer effect is very poor, and the buffer pressure is not adjustable, but due to The structure is simple, so this kind of buffer device is often used in the general finished hydraulic cylinder.

2. Adjustable buffer device: When the buffer plunger enters the inner hole of the cylinder head, the oil return port is blocked by the plunger, and the oil can only be returned through the throttle valve, and the buffer pressure in the cavity increases, which is the deceleration of the piston. The cushioning characteristics are the same as the gap type, but the cushioning effect is poor. When the piston moves in the opposite direction, the pressure oil quickly enters the hydraulic cylinder through the one-way valve, so the piston will not start slowly due to insufficient thrust. This kind of buffer device can adjust the size of the throttle valve opening and change the size of the buffer pressure according to the load situation, so it is widely used.

3. Variable throttling buffer device: variable throttling buffer device, he has a triangular throttling groove on the buffer plunger, and the throttling area gradually decreases with the increase of the buffer stroke. During the buffering process, the size of the orifice can be automatically changed, so that the buffering effect is uniform and the impact pressure is small, but the structure is relatively complex. This article comes from the hydraulic manufacturer WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!

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