[Q&A Question 244] 2017.09.02
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This post was last edited by liuquan1100 on 2017-9-2 13:46. [Q&A Question 244] 2017.09.02: Briefly describe the function of the high-level oil tank in a centrifugal compressor. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The answers to the daily questions change, and today’s answers are shown in subsequent questions. For management purposes, if you need to view content from a few days ago, please access it through the summary post below. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html (Source: Haichuan Chemical Industry Forum)
The high-level oil tank is a protective device; during normal operation of the unit, the lubricating oil in this tank enters from the bottom and then exits from the top to return to the tank. When the main oil pump fails and the auxiliary oil pump does not start in time, the lubricating oil from the high-level oil tank will flow to the lubrication points via the oil pipes under the force of gravity, in order to meet the lubrication requirements during the idle operation of the unit. The fuel storage capacity of the high-position fuel tank should generally be sufficient to provide fuel for at least 5 minutes. The high-level oil tank is one of the safety protection devices for the unit. During normal operation of the unit, the lubricating oil enters from the bottom and then exits from the top to flow back directly into the oil tank. In the event of a power outage that causes the unit to stop operating, and if the auxiliary oil pump cannot start up in time to supply oil, the lubricating oil in the high-level oil tank will flow through the oil inlet pipes, pass through each bearing, and then return to the oil tank, thereby ensuring an adequate supply of lubricating oil during the unit’s coasting phase.
The high-level oil tank is a protective device; during normal operation of the unit, the lubricating oil in this tank enters from the bottom and exits from the top to return to the tank. When the main oil pump fails and the auxiliary oil pump does not start in time, the lubricating oil from the high-level oil tank will flow to the lubrication points along the oil inlet pipes under the force of gravity, in order to meet the lubrication requirements during the idle operation of the unit. The fuel storage capacity of the high-level tank should generally be maintained to provide a fuel supply for at least 5 minutes.
The high-position oil tank is provided to ensure the necessary oil pressure for important 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 normal oil supply to the equipment is provided by the main oil pump. When the unit is operating normally, the main oil pump starts up; the lubricating oil enters the lubrication areas from the bottom and then exits through the overflow ports at the top to return directly to the oil tank. In the event of a power outage that causes the unit to stop, the auxiliary oil pump cannot start up in time to supply oil. At this point, the equipment continues to rotate at high speed due to its inertia, which makes it very likely for bearing damage to occur, resulting in significant losses for the company’s operations. A high-level oil tank can effectively prevent such accidents by meeting the equipment’s demand for lubricating oil during the coasting phase, thus ensuring a safe shutdown of the unit.
The high-level oil tank is a protective device; during normal operation of the unit, the lubricating oil in this tank enters from the bottom and exits from the top to return to the tank. When the main oil pump fails and the auxiliary oil pump does not start in time, the lubricating oil from the high-level oil tank will flow to the lubrication points along the oil inlet pipes under the force of gravity, in order to meet the lubrication requirements during the idle operation of the unit. The fuel storage capacity of the high-level tank should generally be maintained to provide a fuel supply for at least 5 minutes.
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. Our unit’s tank 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.
When the compressor’s lubricating oil system is unable to supply oil properly, it is necessary to ensure that there is sufficient lubricating oil available to meet the lubrication requirements before the compressor stops operating
It ensures a continuous supply of oil in the event of a power outage or pump failure, providing lubrication during emergency shutdowns and preventing bearing damage.
In the event of an abnormal situation, it can supply sufficient oil to enable the centrifuge to stop urgently, preventing dry friction of the bearing shells due to a lack of oil
Brief oil supply in the event of sudden shutdown of the lubricating oil pump
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 and prevent bearing burnout