The treatment methods for solenoid directional valve noise mainly include the following aspects:
I. Check the quality and installation of solenoid.
Problem analysis: The quality of the solenoid itself, such as improper coil processing, defects in the iron core or improper installation, may lead to noise generation.
Solution: Check the quality of the solenoid to ensure that it meet the design requirements and has no manufacturing defects. Check the installation of the solenoid to ensure that it is secure and in the correct position to avoid vibration and noise caused by improper installation. If necessary, replace or repair the solenoid in time.
II. Clean the air gap between the moving and fixed cores.
Problems analysis: The air gap between the moving iron core and the fixed iron core may contain impurities such as shed anti-rust paint flakes and dust, which will affect the smooth movement of the iron core and generate noise.
Solution: Regularly clean impurities in the air gap between the cores to ensure that the air gap is clean and unblocked. Use appropriate cleaning tools and methods to avoid damaging the surface of the iron core.
III. Replace the return spring.
Problem analysis: The spring force of the reset spring is too large or too small, it may cause noise. If the spring force is too large, it may exceed the suction force of the solenoid, resulting in noise when the power is turned on. If the spring force is too small, the valve core may not be reset accurately.
Solution: Check whether the spring force of the rest spring meets the requirements. If the spring force is too large, replace the reset spring that meets the requirements to ensure that it can smoothly push the valve core to reset when power is turned on.
IV. Grinding the valve core and valve hole
Problem analysis: The matching accuracy problem between the valve core and the valve hole, such as burrs, wear or excessive matching clearance, will increase friction and generate noise.
Solution: Grind the valve core and valve hole to restore their original accuracy and matching clearance. After grinding, check the matching of the valve core and valve hole to ensure smoothness.
V. Adjust the length of the swing rod.
Problem analysis: A swing rod that is too long may cause poor suction between the movable iron and the fixed iron core, maintain an abnormal air gap, and thus generate noise.
Solution: Grind the edge of the rocker rod appropriately to shorten its length, but be careful not to grind it too much to avoid affecting the normal opening of the valve. After adjusting the length of the rocker rod, the working condition of the electromagnetic reversing valve should be rechecked to ensure that it is noise-free and operating normally.
In summary, the methods to deal with the noise of the solenoid directional valve in the hydraulic system mainly include checking the quality and installation of the solenoid, cleaning the air gap between the iron cores, replacing the return spring, grinding the valve core and valve hole, and adjust the length of the swing rod. These measures can effectively reduce the noise level of the solenoid directional valve and improve the operational efficiency and stability of the equipment.
