Spring return and hydraulic return of Manifold Block electromagnetic reversing hydraulic valve
The most commonly used centering method of Manifold Block solenoid directional hydraulic valve is spring centering. Springs of the same specification are installed at both ends of the main valve core of the Manifold Block electromagnetic directional control hydraulic valve. When the electromagnetic directional control valve is energized and the Manifold block electro-hydraulic valve begins to reverse, the pressure oil pushes the valve core to one side and compresses one spring. When the Manifold Block electromagnetic directional control valve is cut off, The pressure oil that controls the movement of the solenoid reversing hydraulic valve main spool is released, and the main spool returns to its original position under the action of the spring force.
It should be noted that the spring return electromagnetic reversing hydraulic valve, the minimum pressure of the control pressure oil is specified. Below this minimum control pressure, the main spool will not be able to complete reversing.
The structure of spring centering is simple, and most of the Manifold block solenoid reversing hydraulic valves with median function use spring centering or reset design. However, the spring reset solenoid reversing hydraulic valve also has its limitations. Manifold Block electromagnetic reversing hydraulic valve has its maximum flow standard. If the rated flow exceeds the standard, the working efficiency of Manifold Block electromagnetic reversing hydraulic valve will be affected, and even the reversing can not be done, resulting in faults.
In this case, spring alignment is also prone to problems. When the reversing action of Manifold Block electromagnetic reversing hydraulic valve ends and needs to be reset to the middle position, the spring at its end will push the valve core to reset. But if the flow is too large at this time, it can produce enough force to offset the return of the spring to the spool.
In general, considering the service life, temperature rise of hydraulic oil, working stability and other factors, the selection of Manifold Block electromagnetic directional hydraulic valve must meet the requirement that the rated flow of the solenoid directional hydraulic valve is greater than the actual working flow. The rated flow rate of the solenoid reversing hydraulic valve will vary depending on the median function.
The above is the information sharing brought by Manifold Block electromagnetic directional hydraulic valve manufacturers. To learn more about the related knowledge, you can pay attention to our official website!