【Mechanical Equipment Technology Edition】Daily Question 20171013: Case Study on Energy Regulation of Screw Compressors (1)
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This post was last edited by YORK Industrial Refrigeration on 2017-10-16 at 14:15. Starting from now, in order to enhance communication among users, we have launched the \"One Question per Day\" activity in 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. There is a screw compressor unit that has been in operation for a long time and whose condenser is quite dirty. Why does it produce high levels of noise and vibration at low load levels, while the noise and vibration are lower at higher load levels? When the carrier level is low, the internal pressure ratio is less than the external pressure ratio, resulting in under-compression. ================================ High-quality promotions: Mechanical equipment---Maintenance procedures for York screw compressors http://bbs.hcbbs.com/thread-1806833-1-1.html Mechanical equipment---Upgrading of York Quinton control centers http://bbs.hcbbs.com/thread-1804837-1-1.html Mechanical equipment---Major repairs for GEA Grasox screw compressors http://bbs.hcbbs.com/thread-1800467-1-1.html Mechanical equipment---Disassembly and maintenance of British HOWDEN screw compressors http://bbs.hcbbs.com/thread-1832529-1-1.html Mechanical equipment---Disassembly and maintenance of Japanese Maekawa MYCOM screw compressors http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1786445
The material with a high load level is abundant, resulting in few gaps and minimal vibration
The material with a high load level is abundant, resulting in few gaps and minimal vibration
The material with a high load level is abundant, resulting in few gaps and minimal vibration
It’s related to resonance; the material loaded has a high load capacity, is uniform, and experiences minimal vibration.
Due to the dirty condenser, there was an overload issue when starting up.
When the load is low, the exhaust pressure and oil pressure are low, which makes it difficult for the system to return oil, leading to bearing heating, increased friction, and abnormal noises
Insufficient refrigerant； The pressure difference between suction and exhaust is too small ； Excessively low exhaust pressure and low refrigerant level in the evaporator ； Low oil pressure ； Large oil pressure difference ； The lubricant temperature is low, and its viscosity is too high.