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Causes of gantry hydraulic valve spool jam
Add Time: 2019-11-30 14:10 Source: unknown Author: Forging Branch letter
In the production process of the gantry hydraulic press , the spool of the flow valve is stuck. How should we solve it? The following briefly introduces the solution.

1. The gap between the valve body hole and the valve core of the hydraulic press is too small. When the oil temperature rises, the valve core swells into the valve hole. The geometric dimensions and shape and position tolerances of the valve core of the hydraulic machine are extremely poor, and the valve core and the valve empty assembly axis do not coincide, which causes the axial hydraulic pressure to be stuck. There is a burr on the surface of the spool of the hydraulic press, or the spool is stuck due to a bruise. Solution: The following methods can be used to solve the problem. The burr on the valve core can be cleaned with 100 mesh whetstone. The burr of the valve hole or the fit clearance is too small. It can be removed by grinding with a small amount of diamond grinding paste on the corresponding grinding rod.

2. The installation accuracy of the hydraulic machine is poor, the fastening screws are not uniform, the order is not followed, or the flange of the pipe flange joint is warped, which causes the valve body to deform.

3. The resetting of the spring centered hydraulic valve is relatively hard, the driving force needs to be large, the spring is stuck or the spring breaks, resulting in that the valve core cannot be reset.

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4, hydraulic oil pollution is more serious, particles and impurities can not be filtered out and stuck the valve core.

5. The temperature of hydraulic oil is too high for a long time, resulting in deterioration of the oil, resulting in gelatinous substances, stuck on the surface of the valve core and stuck.

6. The viscosity of the gantry hydraulic oil is too high, the valve core is difficult to move, and it even gets stuck.