Do the high and low pressure oil pumps start when the rod mill is turned?
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Do the high and low pressure oil pumps start when the rod mill is turned? Is it like the normal startup of a rod mill, where the high-pressure oil pump is started first, and then the low-pressure oil pump?
When rotating the rod mill, the startup sequence for the low-pressure and high-pressure oil pumps should be to start the low-pressure oil pump first, followed by the high-pressure oil pump. Because the inlet of the high-pressure oil pump is connected to the outlet of the low-pressure oil pump.
The sequence for starting the low-pressure and high-pressure oil pumps during crankshaft rotation is the same as that when the mill is operated normally: the low-pressure oil pump is started first, and only when the oil pressure reaches the specified level will the high-pressure oil pump be activated; otherwise, it cannot be started due to program control.
When rotating the rod mill, it is necessary to start the low-pressure oil pump and the high-pressure oil pump in sequence before enabling the slow rotation system. The purpose of starting the low-pressure oil pump is to supply oil to the inlet of the high-pressure oil pump as well as to provide lubrication to the front and rear bearing shells. The low-pressure oil pump should be equipped with alarms for high and low pressure levels. The purpose of starting the high-pressure oil pump is to use the high-pressure oil to lift the front and rear bearing shells of the rod mill, thereby creating an oil film that reduces starting friction and protects the bearing shells.
When rotating the rod mill drum, it is necessary to activate the high and low pressure oil stations. The startup sequence for the high and low pressure oil pumps should be to start the low pressure oil pump first, followed by the high pressure oil pump
Take a look at the process with the pump and it will be clear; the fluid for the high-pressure oil pump comes from the low-pressure oil pump. Of course, start the low-pressure pump first, then the high-pressure pump. If you are turning the drum, you definitely have to start the pump. There’s also a interlock in place; unless you can turn it while installing the mill, in which case a crane would be used.
This post was last edited by Learn to live on 2009-11-5 15:10. After the high-pressure oil pump stops, does the low-pressure oil pump still use the high-pressure oil pump to deliver oil to the bearings of the rod mill? Is there still a bypass, through which the low-pressure oil pump sends oil to the rod mill? Is this process automated, or does it require manual switching?