【Mechanical Equipment Technology Edition】Daily Question 201802012: Revisiting High Scores from Festive Periods – Screw Compressors Series (2)
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To enhance communication among those interested in marine equipment, we have launched the 【Question of the Day】 initiative on the Mechanical Equipment Technology forum. We hope everyone will participate actively to progress and improve together! ! ! Festival benefit rewards: Those who actively participate earn 10 points of wealth and 1 point of charm; those who give reasonable answers receive 15 points of wealth and 2 points of charm; those who provide perfect answers get 30 points of wealth plus 3 points of charm. Every commentator receives a rating (valid permanently). Question: What could be the reasons for high vibration and loud noise in screw refrigeration compressors? https://attach01.hcbbs.com/forum/201709/21/095407yfsslsldwfeyxs5y.jpg ============================== High-quality promotions: Mechanical equipment——Maintenance procedures for York screw compressors https://bbs.hcbbs.com/thread-1806833-1-1.html Mechanical equipment——Upgrading of York Quinton control centers https://bbs.hcbbs.com/thread-1804837-1-1.html Mechanical equipment——Major repairs for GEA Grasox screw compressors https://bbs.hcbbs.com/thread-1800467-1-1.html Mechanical equipment——Disassembly and maintenance of British HOWDEN screw compressors https://bbs.hcbbs.com/thread-1832529-1-1.html Mechanical equipment——Disassembly and maintenance of Japanese Maekawa MYCOM screw compressors https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor.
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor. For screw compressors, this situation is extremely dangerous as it can easily lead to complete damage of the compressor.
The main reasons for the high vibration and loud noise in screw-type refrigeration compressors may be as follows: 1. Insufficient refrigerant in the refrigeration system, as screw-type refrigeration systems do not have an oil pump; instead, the pressure difference between the suction and discharge sides is used to achieve circulation. Therefore, a shortage of refrigerant in the cooling system can lead to a decrease in the exhaust pressure of the screw compressor as well as a low level of refrigerant in the evaporator. When the pressure difference within the system is too low and the refrigerant level in the evaporator is too low, it becomes difficult for the oil to return to the system, resulting in dry friction between the rotors. This causes abnormal vibrations in the screw compressor and generates unusual noises. 2. Abnormal differences in high and low pressure within the refrigeration system, along with excessively low exhaust pressure in screw compressors and low oil pressure in these compressors, can cause the bearings to overheat and increase friction, which in turn can lead to abnormal noises. 3. A clogged oil filter or poor quality of the oil can lead to an increase in oil pressure differences, malfunctions in the solenoid valves of the main oil circuit, as well as abnormal noises and sounds. 4. The moving parts inside the compressor may suffer from poor lubrication or damage.
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor. For screw compressors, this situation is extremely dangerous as it can easily lead to complete damage of the compressor.
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor.
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor. For screw compressors, this situation is extremely dangerous as it can easily lead to complete damage of the compressor.
The reasons for vibration and noise in screw refrigeration compressors may include the following: 1. Insufficient refrigerant in the refrigeration system. Since screw refrigeration systems do not have an oil pump, but rely on the pressure difference between the suction and discharge sides, a lack of refrigerant can lead to a decrease in the discharge pressure of the screw compressor as well as a low liquid level of the refrigerant in the evaporator. This makes it difficult for oil to return to the system, resulting in dry friction between the rotors and the generation of abnormal noises. 2. Abnormal differences in high and low pressure within the refrigeration system; too low exhaust pressure and oil pressure in screw compressors can cause the bearings to overheat, increase friction, and also result in abnormal noises. 3. A clogged oil filter or deteriorating oil quality can lead to an increase in oil pressure difference and malfunctions in the solenoid valves of the main oil circuit; this can also result in noise and abnormal sounds. 4. Poor lubrication or damage to the moving parts inside the compressor.
There are many reasons for the noise generated by screw compressors. The main sources include the dynamic noise of air (or other working fluids) radiating from the inlet and outlet, the mechanical noise produced by the moving mechanical components, and the electromagnetic noise generated by the drive motor. The main reasons for vibration in screw compressors are as follows: loose foundation bolts of the unit ； Vibrations caused by imbalance in the rotor system ； The motor and compressor rotor are out of alignment ； Compressor motor vibration ； Resonance in the unit’s process pipelines causes increased vibration in the unit ； Damage or wear of the compressor bearings ； Inhaling liquid refrigerant.
It is caused by poor oil return, air in the system pipes, and an excessive amount of refrigerant. When a screw compressor experiences vibration or abnormal noise, it is usually due to a lack of oil in the compressor or backflow of liquid into the compressor. For screw compressors, this situation is extremely dangerous as it can easily lead to complete damage of the compressor
Analysis of reasons for high vibration and loud noise: 1. Poor alignment of the coupling； 2. Possible water hammer ； 3. Overload operation ； 4. Bearing damage, etc