Reasons for the deformation of the four-column hydraulic oil cylinder

The cylinder of the three-beam four-column hydraulic press is elastically deformed under the action of hydraulic pressure, and the increase of the gap between the piston and the cylinder affects the sealing effect, and the deformation of the cylinder causes the piston and the piston rod to produce slight displacement, which affects the accuracy of the hydraulic press and reduces the production efficiency.

Reasons for the deformation of the hydraulic cylinder of the four-column hydraulic press:

1. The strength and rigidity of the three-beam four-column hydraulic cylinder itself is not strong

1. Three-beam four-column hydraulic cylinders with poor material or unreasonable cylinder structure design misuse low-strength steel to reduce the yield point and safety factor. Daily use will inevitably expand the diameter of the pipe.

2. On the cylinder wall of the hydraulic cylinder with a long length, there is no reinforcing belt in the middle of the outer ring, so it cannot bear the load force.

3. Special attention should be paid to the strength and rigidity of the check cylinder when designing.

2. Abnormal high pressure during the working process of the three-beam four-column hydraulic press

1. The piston with large load or high speed has a large inertial force. When it stops suddenly, the pressure value in the working chamber increases instantaneously, and then exceeds several times of the maximum working pressure, and the inner diameter of the trachea expands.

2. Hydraulic cylinders often work under overload. For example, a 200-ton three-beam four-column hydraulic press suddenly stops and restarts, and the instantaneous oil pressure will increase by more than 2 times, which will easily cause the expansion of the inner diameter of the pipe.

3. The buffer device of the three-beam four-column hydraulic press does not work at all and is in a fully open state, so the action piston cannot decelerate, it may suddenly hit the cover and bounce back, and the action chamber instantly becomes overpressure.

When the cylinder of the three-beam four-column hydraulic press expands, the leakage will affect the normal operation of the four-column hydraulic press. Therefore, operators should operate according to the regulations in daily life and strengthen daily maintenance work. When a reinforcement structure is applied to the cylinder wall to measure the large deformation of the inner diameter, reinforcement measures should be taken first, and the grinding method is generally used to repair the inner wall.

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