Urgent help – problem with turning the drum after the mill stops
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How often should the rotor be turned after the mill is stopped, and how is it done? What are the guidelines? This post was last edited by Tianya Langji on 2009-3-25 at 13:43.]
Every time the mill is started up, it is necessary to turn the drum first! Manual knob. This is an unspoken rule that must be followed. Hehe.
I want to ask the person upstairs: by \"manual rotation,\" does it mean taking the grinder apart and manually checking whether the grinding roller rotates or not? It seems that every time we park our vehicle, we have to take the grinder apart for cleaning; I’ve never heard of turning it around before starting the engine...
After the mill is stopped, it is turned 180 degrees every four hours to prevent gravitational effects on the cylinder body
Every time the mill is started up, it is necessary to first rotate the rotor to insulate it! Some use a turntable ； When the insulation is in good condition, the grinder can be started up until the current returns to normal; depending on the situation, the machine can be aligned once a month.
After the mill is stopped, turn the drum 180 degrees every 4 hours, using slow drive jog to do so. Turn the key 2–3 times while driving.
This post was last edited by xuqinger on 2009-5-3 13:02. There are generally no specific regulations regarding the rotation of coal grinding mills; it is decided based on the conditions of each factory. Generally, turning the mill helps prevent it from becoming stiff over time, as well as avoiding sagging of the cylinder due to gravity over extended periods. However, it is necessary to turn the engine over before driving, and this turning over should cover more than one full circle to prevent jamming, which could otherwise burn out the motor or damage the equipment and the motor.
After the mill is stopped, there is no need to turn it manually if it is going to be started again in a short time; however, during a long period of shutdown, it is necessary to turn the mill manually every 4 hours. Some factories require this operation every 2 hours. Generally, the mill is turned manually before it is started up, and it is not as mentioned on the third floor – a slow-speed manual rotation is not used.
Previously, at the actual production facility, the mill would be rotated once every two hours after it was stopped, in order to prevent deformation of the cylinder.
For long-term parking, if the steel rod is removed, is it then not necessary to turn the shaft?
Personal opinion: 1. Whether it is an old or new mill, the drum must be manually rotated before each start-up, in order to check for any movement obstacles and prevent accidents； 2. When the mill is shut down for a short period of time, it is generally necessary to turn the drum once every 2–4 hours, by an angle of 180°. The purpose is to prevent deformation of the mill cylinder ； 3. If the mill is shut down for an extended period, the grinding media can be removed. Supporting structures are also installed below the middle part of the mill cylinder, allowing the mill to operate without needing to be rotated ；
All the points mentioned above are basically correct; that is, an auxiliary motor is used for turning the shaft during rotation, rather than the main motor!
Cranking the machine is similar to an airplane gliding – it’s necessary. We do it manually, but there are also specialized cranking motors; this is to prevent the mill from being damaged due to its own physical properties when started suddenly!