[Q&A Question 134] 2018.05.14

The function of the high-level oil tank for the lubrication (control) oil of the centrifugal circulation machine is to supply lubricating oil to the compressor in the event that the lubricating oil pump stops operating unexpectedly； The function of the high-level seal oil tank is merely to transmit pressure.

The function of the high-level oil tank is to provide sufficient oil to the bearing shells in the event of a power outage or damage to the oil pump, ensuring that the centrifuge can stop urgently without the bearing shells suffering from dry friction due to a lack of oil. Function of the high-level oil tank: The high-level oil tank serves to ensure that in the event of production accidents, such as power outages or pump failures, the gravitational potential energy resulting from the height difference can be used to supply lubricating oil to the machinery, thereby enabling lubrication and cooling. To prevent the shaft bearings from being damaged, it supplies lubrication to the equipment bearings during the period when the unit is running at idle speed, thereby protecting the shafts and bearings after the low lubricating oil pressure interlock is triggered. Under normal conditions, the lubricating oil enters the high-level oil tank through a flow-limiting orifice plate, and then returns to the tank via a high-level overflow pipe, thereby ensuring the renewal of the lubricating oil in the high-level oil tank. In an emergency situation, the lubricating oil in the high-level oil tank flows back to the bearings through check valves to lubricate them. Generally, the oil storage capacity of the high-level oil tank should be sufficient to last for about 5 minutes. In the event of a power outage, voltage fluctuations, or pump failures, the gravitational potential energy resulting from the height difference is used to supply lubricating oil to the machine temporarily, thereby lubricating the equipment bearings during periods when the machine is running idle and protecting the shafts. This prevents dry friction between the bearings from causing damage to the bearing shells. Before the unit starts operating, the oil circuit system is activated first. The oil inlet line in the high-level tank is relatively thin and equipped with a flow control orifice, while the oil return line is thicker. When the power to the system is cut off, the oil supply system in the high-level tank stops functioning as well due to the shutdown of the oil pump; at this point, no oil flows out through the return line. Instead, the oil in the high-level tank is forced into the compressor system by the difference in pressure. The tank in our facility can supply oil for ten minutes, and there are also two sets of accumulators, which provide enough time to use the emergency stop button to ensure the safe shutdown of the unit. The function of the high-level oil tank is to ensure that the centrifuge shuts down in case the centrifugal oil pump loses power and the emergency oil pump does not start; the oil in the high-level oil tank is used to lubricate the bearings, thereby preventing bearing burnout. The difference between a centrifugal compressor and a reciprocating compressor is that it does not stop rotating immediately after shutdown; due to inertia, it continues to rotate for some time, a phenomenon known as coasting. When the electric pump at the fuel station stops operating for some reason (usually the compressor enters self-protection mode due to low oil pressure), or when there is a fault in the lubrication system for other reasons (such as leaks at the lowest points), and the lubrication system cannot function properly while the unit is still running (whether it is stopped or not), this measure is taken to prevent bearing wear and damage to the bearing shells. There should be requirements regarding the height and capacity of the high-position fuel tank

The high-position oil tank is installed to ensure the proper oil pressure for critical bearings and various lubrication points, thereby providing sufficient lubrication in these areas and creating a stable oil film that guarantees the proper operation of the equipment.

The purpose of the high-level oil tank for lubricating oil is to ensure a supply of oil for a short period of time in case the lubricating oil pump stops supplying oil, thereby preventing damage to equipment that is running at high speeds during periods of idling due to a lack of lubrication. The function of the sealed oil high-level tank is to create a fixed small pressure difference in order to provide shaft sealing for equipment operating at high speeds.

The function of the high-level oil tank is to provide sufficient oil to the bearing shells in the event of a power outage or damage to the oil pump, ensuring that the centrifuge can stop urgently without the bearing shells suffering from dry friction due to a lack of oil.

A high-position oil tank serves to ensure that, in the event of a production accident or a failure of the oil pump, the gravitational potential energy resulting from the height difference can be used to supply lubricating oil to the machinery, thereby enabling lubrication and cooling. To prevent the shaft bearings from being damaged, it provides lubrication for the equipment bearings during the period when the unit operates at idle speed, after the low lubricating oil pressure interlock is activated, thereby protecting the shafts and bearings.

The function of the high-level oil tank for the lubrication (control) oil of the centrifugal circulation machine is to supply lubricating oil to the compressor in the event that the lubricating oil pump stops operating unexpectedly； The function of the high-level oil tank for seal oil is merely to transmit pressure