Issues with shutting down the main motor during water-coal slurry preparation?
Thread Content
This post was last edited by lflsedin on 2015-6-10 22:05. Preparation of water-coal slurry, CLIC grinding mills; why does the main motor stop when the pressure of the air supply for the pneumatic clutch is low?
If the air supply is low but the machine keeps running, the clutch will not clamp tightly, resulting in rotational friction that can burn out the clutch air bag and the friction pad. Therefore, a minimum air supply pressure must be set. and contact time. Interlock with the host. Interlocks are generally implemented using PLCs
Severe wear and heating of the inner and outer rings of the pneumatic clutch
The air supply has been disconnected, so the clutch can’t hold tightly – how can there be any friction?
The issue is low air source pressure; it’s not the solenoid valve that is releasing air, and in this case the grinder is shown as being operating normally. At startup, there is a 4-second clutch detection period; if it is detected that the connection has not been established, the interlock controller will stop the machine.
It is precisely because of the state of being tightly held or not that severe wear occurs
In fact, slippage and wear only occur when it is not held tightly.
There is a interlock shutdown in case the air supply pressure is low. That 4S stopped only during the startup of the grinder.