【Mechanical Equipment Technology Edition】Daily Question 20171117: Lubrication System of Screw Compressor Units (7)
Thread Content
This post was last edited by YORK Industrial Refrigeration on 2017-11-20 at 09:00. Starting from now, in order to enhance communication among users, we have launched the \"One Question per Day\" activity on the Mechanical Equipment Technology forum. We hope everyone will participate actively to progress and improve together! ! ! Rewards: 3 wealth points for active participation, 10-15 wealth points for correct answers. This question is valid for two days; no scoring will be given after that period. What is the function of refrigerant oil? Which parts of a screw compressor require refrigerant oil? Functions of refrigeration oil: lubrication, sealing, cooling, and energy regulation. Parts required: bearings, bearings, screws and chambers, energy regulation mechanism ================================ Premium promotions: Mechanical equipment---York screw compressors – maintenance procedures https://bbs.hcbbs.com/thread-1806833-1-1.html Mechanical equipment---Upgrading York Quinton control centers https://bbs.hcbbs.com/thread-1804837-1-1.html Mechanical equipment---GEA Grasso screw compressors – major repairs https://bbs.hcbbs.com/thread-1800467-1-1.html Mechanical equipment---British HOWDEN screw compressors – disassembly and maintenance https://bbs.hcbbs.com/thread-1832529-1-1.html Mechanical equipment---Japanese Maekawa MYCOM screw compressors – disassembly and maintenance https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1786445
When replacing the refrigerant oil in a screw compressor, it is important to note that oils of different grades must not be mixed together, especially mineral oils and synthetic ester oils; if oils of different grades are used, care must be taken to remove any remaining oil from the system. Some oils have the property of absorbing moisture, so they should not be left exposed to air for long periods of time. During installation, minimize the time the system is exposed and ensure proper vacuuming is carried out; if the compressor motor has been damaged in a previous incident, special care should be taken when replacing it to remove any residual acidic substances from the system. The acidity of the refrigerant oil should be checked 72 hours after the system is put into operation, and it is recommended to replace the refrigerant oil and the dryer filter in order to reduce the risk of acid corrosion. After about a month of operation, the refrigerant oil should be tested or replaced again; if water has entered the system at any point, special care must be taken to remove all moisture. In addition to replacing the refrigerant oil, it is important to check the acidity of the oil and replace it with fresh oil as well as the dryer filter in a timely manner.
Refrigerant oil is an essential auxiliary material for the operation of screw compressors. It creates a dynamic seal between the screws and the compression chamber, as well as between the male and female screws, thereby reducing leaks of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. Refrigerant oil can also cool the compressed refrigerant; it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Additionally, refrigerant oil serves to lubricate the bearings. It is capable of transmitting pressure differences, which in turn drives the capacity control system. Through the operation of the compressor’s load/unload solenoid valves, it adjusts the position of the capacity control slider, enabling control over the compressor’s capacity. Refrigerant oil can also help reduce operating noise.
The main functions of lubricating oil include: lubrication, load transfer, cooling, noise reduction, sealing, and rust prevention. Lubricant is needed for the compressor’s bearings, oil pistons, and between the male and female rotors
Refrigerant oil is an essential auxiliary material for the operation of screw compressors. It creates a dynamic seal between the screws and the compression chamber, as well as between the male and female screws, thereby reducing leaks of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. Refrigerant oil can also cool the compressed refrigerant; it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Additionally, refrigerant oil serves to lubricate the bearings. It is capable of transmitting pressure differences, which in turn drives the capacity control system. Through the operation of the compressor’s load/unload solenoid valves, it adjusts the position of the capacity control slider, enabling control over the compressor’s capacity. Refrigerant oil can also help reduce operating noise. Therefore, it can be said that the quality of screw compressor unit performance ultimately depends mainly on the selection and use of oil, as well as on the system’s oil return and cooling design.
Refrigerant oil can create a dynamic seal between the screw and the compression chamber, as well as between the male and female screws, thereby reducing the leakage of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. The refrigerant oil can also cool the compressed refrigerant; it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Refrigerant oil serves to lubricate the bearings as well. It can transmit pressure differences, enabling the operation of the capacity control system – through the action of the compressor’s load/unload solenoids, it adjusts the position of the capacity control slider, thereby allowing for control over the compressor’s capacity. Additionally, refrigerant oil helps to reduce operating noise.
In compressors, refrigerant oil serves four main functions: lubrication, sealing, cooling, and energy regulation. Lubricant is needed for the compressor’s bearings, oil pistons, and between the male and female rotors
Function: Refrigerant oil is an essential auxiliary material for the operation of screw compressors. It creates a dynamic seal between the screws and the compression chamber, as well as between the male and female screws, thereby reducing leaks of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. The oil also cools the refrigerant being compressed – it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Refrigerant oil serves to lubricate the bearings as well. It can transmit pressure differences, enabling the capacity control system to function; through the operation of the compressor’s load/unload solenoid valves, it adjusts the position of the capacity control slider, thereby allowing control over the compressor’s capacity. Additionally, refrigerant oil helps to reduce operating noise. Therefore, it can be said that the quality of screw compressor unit performance ultimately depends mainly on the selection and use of oil, as well as on the system’s oil return and cooling design. Location: Frozen oil is required for all the locations mentioned above
Refrigerant oil is an essential auxiliary material for the operation of screw compressors. It creates a dynamic seal between the screws and the compression chamber, as well as between the male and female screws, thereby reducing leaks of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. Refrigerant oil can also cool the compressed refrigerant; it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Additionally, refrigerant oil serves to lubricate the bearings. It is capable of transmitting pressure differences, which in turn drives the capacity control system. Through the operation of the compressor’s load/unload solenoid valves, it adjusts the position of the capacity control slider, enabling control over the compressor’s capacity. Refrigerant oil can also help reduce operating noise. Therefore, it can be said that the quality of screw compressor unit performance ultimately depends mainly on the selection and use of oil, as well as on the system’s oil return and cooling design.
Refrigerant oil is an essential auxiliary material for the operation of screw compressors. It creates a dynamic seal between the screws and the compression chamber, as well as between the male and female screws, thereby reducing leaks of refrigerant from the high-pressure side to the low-pressure side during compression and minimizing mechanical wear between these components. Refrigerant oil can also cool the compressed refrigerant; it is injected into the compressor to absorb the heat generated by the refrigerant gas during compression, thus lowering the exhaust temperature. Additionally, refrigerant oil serves to lubricate the bearings. It is capable of transmitting pressure differences, which in turn drives the capacity control system. Through the operation of the compressor’s load/unload solenoid valves, it adjusts the position of the capacity control slider, enabling control over the compressor’s capacity. Refrigerant oil can also help reduce operating noise. Therefore, it can be said that the quality of screw compressor unit performance ultimately depends mainly on the selection and use of oil, as well as on the system’s oil return and cooling design.
When replacing the refrigerant oil in a screw compressor, it is important to note that oils of different grades must not be mixed together, especially mineral oils and synthetic ester oils; if oils of different grades are used, care must be taken to remove any remaining oil from the system. Some oils have the property of absorbing moisture, so they should not be left exposed to air for long periods of time. During installation, minimize the time the system is exposed and ensure proper vacuuming is carried out; if the compressor motor has been damaged in a previous incident, special care should be taken when replacing it to remove any residual acidic substances from the system. The acidity of the refrigerant oil should be checked 72 hours after the system is put into operation, and it is recommended to replace the refrigerant oil and the dryer filter in order to reduce the risk of acid corrosion. After about a month of operation, the refrigerant oil should be tested or replaced again; if water has entered the system at any point, special care must be taken to remove all moisture. In addition to replacing the refrigerant oil, it is important to check the acidity of the oil and replace it with fresh oil as well as the dryer filter in a timely manner.