Hydraulic cylinder selection need attention?

Compared with buying hydraulic equipment and buying a house, the degree of trouble is the same, in addition to the influence of the guide column on the performance of the four-column hydraulic press, the advantages and disadvantages of the hydraulic cylinder also directly affect the performance of the hydraulic press. We know that the hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and does linear reciprocating movement (or swing movement). In the reciprocating movement of the machine, the deceleration device can be eliminated, and there is no transmission gap, so that the hydraulic equipment moves smoothly. Therefore, if the hydraulic cylinder is not suitable, it will not only shorten the service life of the hydraulic press, but also increase the equipment failure rate and the shutdown accident.

The surface of the cylinder is rough, the coaxiality and wear resistance are poor, and the long-term movement friction will easily damage the seal ring or seal, resulting in frequent hydraulic oil leakage accidents.

Different uses, hydraulic cylinder selection should pay attention to:

1, a single linear movement directly using the hydraulic cylinder to achieve is the most simple and convenient.

2, requiring the same speed of round-trip movement, double piston hydraulic cylinder can be used; If there is a requirement for quick return, it is appropriate to use a single piston rod type hydraulic cylinder, and a differential connection can be considered.

3, when the stroke is long, the plunger cylinder can be used to reduce the difficulty of processing; When the stroke is long but the load is not large, some transmission devices can also be considered to expand the stroke.

4, reciprocating swing movement can be used both swinging hydraulic cylinder, can also be used linear hydraulic cylinder and connecting rod mechanism or gear - rack mechanism to achieve.

5. The hydraulic cylinder of the clearance seal piston should not bear heavy loads. When the gap seal is used between the piston of the hydraulic cylinder and the cylinder, the pressure of the hydraulic system should not be too high, and the load should not be too large, otherwise it is easy to produce a large number of leaks and reduce the efficiency of the system. Excessive load will significantly shorten the life of the piston.