【Q&A Question 091】April 01, 2017
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【Q&A Question 091】April 01, 2017: What is the function of the high-level oil tank in a circulating hydrogen compressor? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) In the event of an accident, by increasing the buffer time, if the standby auxiliary oil pump cannot start automatically, the compressor continues to rotate due to its inertia, and it takes some time for the entire unit to come to a complete stop. During this period, the lubricating oil in the high-level oil tank supplies lubrication by utilizing its potential energy. 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 Third Round of Haichuan Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemical Industry Forum)
A high-position 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 provides lubrication for 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 activated. 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.
The function of the high-level fuel tank is to prevent a situation where, in the event of a sudden power loss and the shutdown of both the main and auxiliary fuel pumps, lubrication and cooling can still be provided to the rotor and bearings during the time it takes for the rotor to come to a stop.
When the compressor stops suddenly due to a power outage, the high-level oil tank can continue to lubricate the bearings and other components that require lubrication
After the lubricating oil pump stops operating suddenly, it provides lubrication to the unit during its coasting phase. Its structure consists of a main pipeline equipped with an inverted check valve, while a bypass is used for filling the system with oil; once the system is fully filled, the bypass is closed. When there is no oil pressure in the system, the oil from the high-level tank supplies lubrication to the system due to gravity
A high-position 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 operates at idle speed, following the low lubricating oil pressure interlock, thereby protecting the shafts and bearings. 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 replacement of the lubricating oil in the high-level oil tank.
For the lubrication of crossroads and sliding rods, it can provide cushioning compensation in case of leakage
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.
The normal oil supply for the air compressor is provided by the main oil pump. It is connected to the gearbox shaft of the speed increaser; if the unit experiences a sudden power outage or stops operating, the main oil pump will be unable to supply oil. However, at this time the air compressor is still rotating due to its inertia, making it prone to bearing wear accidents. To prevent such accidents, the lubrication system is equipped with a high-level oil tank or an auxiliary oil pump for emergency use. Additionally, during normal startup or shutdown, oil supply must also be provided by the auxiliary oil pump. While driving, the oil pump should first supply oil to the upper fuel tank; once the tank is filled, the oil will overflow through the small holes in the upper return pipe and flow back into the tank. When the unit stops due to a sudden power outage, and the oil pressure drops below 0.05 MPa (gauge pressure), the high-level oil tank supplies oil to various lubrication points through the lower pipes ； Some compressor units are equipped with an emergency standby auxiliary oil pump system driven by a DC motor, which can start automatically to supply oil in the event of a power outage. In short, as long as the compressor is running, it needs lubricating oil at all times. Various emergency measures are needed to ensure the safety of the equipment.