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Analysis Of Common Faults Of Speed Regulating Valve For Rail - Type Cargo Lift
Oct 26, 2017

Rail-type elevator structure is strong, carrying capacity, smooth Cargo Lift, installation and maintenance is simple and convenient, is economical and practical low-floor alternative elevator ideal transport equipment. According to the installation of the Cargo Lift platform and the use of requirements, choose a different optional configuration, can achieve better results.

First, the flow regulation failure

This refers to adjust the throttle adjustment part of the oil chamber flow does not change, the main reason is the spool radial jamming and throttling part of the failure occurred. The main reason is the locking device loose, throat part of the blockage, oil temperature, into the oil chamber minimum pressure is too low and into the oil chamber and then reverse. So when used to pay attention to the location of the oil chamber, to avoid the reverse. When the pressure relief spool or throttle spool is in the fully closed position, the radial stuck will cause no flow in the oil chamber. When the fully closed position (or the orifice is adjusted), the radial catch will adjust the throttling The adjustment part of the oil flow does not change.

In addition, when the throttle adjustment part of the failure, will make the adjustment screw can not move axially, so that the oil chamber flow does not change. When the spool is jammed or throttled, some parts should be cleaned and repaired.

Second, the flow is not stable

Decompression and throttling speed control valve When the throttle adjust the lock, sometimes there will be unstable flow phenomenon, especially in the minimum stable flow more prone to. The main reason is the locking device loose, throat part of the blockage, oil temperature, into the oil chamber minimum pressure is too low and into the oil and then reverse.

Oil flow through the QF-type speed control valve, the valve on the throttle valve can not afford the role of pressure compensation, the governor valve into a throttle. Therefore, when the oil pressure into the oil chamber changes, the flow will flow through the change, resulting in instability in traffic.


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