[Mechanical Equipment Technology Edition] Daily Question 201802027: Common Faults in Refrigeration Systems (9.8)
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This post was last edited by YORK Industrial Refrigeration on 2018-3-1 at 08:00. Starting from now, in order to enhance communication among members, 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 score will be given after that period. After overhauling a screw compressor, how can one roughly determine whether it has been repaired successfully? 1. After the major repair, rotate the compressor; by doing so, it is possible to determine whether there are any dead spots in the compressor as a result of the repair, as well as whether any abnormal noises are present. 2. Conduct a sealing test. ============================== 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 Grauso 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=
Low vibration, low noise, and temperature can meet the requirements
First after major repair； Use a gauge to measure the gap at the inlet and outlet ends. Second, perform manual cranking to check whether the male and female rotors are stuck or have dead spots. Third, conduct a airtightness test. Fourth, check whether the fill amount adjustment device is functioning properly. Whether the attached pipelines are leaking.
1. The static pressure test for sealing is successful. 2. The meshing clearance and cross-sectional clearance meet the standards. 3. The rotor can rotate freely, without any jamming or noise
Run it at no load to check the current and temperature
Rotate the drive screw to check for any blockages and to ensure even rotation.
Catalyst stability refers to the ability of a catalyst to maintain its properties and structure, such as activity, selectivity, resistance to toxicity, and thermal stability, throughout a catalytic reaction process.
During reinstallation, the gaps between various components must meet the standards; furthermore, manual rotation of the shaft should occur without any jamming or abnormal noises, which indicates that the equipment has been properly repaired.
First after major repair； Use a gauge to measure the gap at the inlet and outlet ends. Second, perform manual cranking to check whether the male and female rotors are stuck or have dead spots. Third, conduct a airtightness test. Fourth, check whether the fill amount adjustment device is functioning properly. Whether the attached pipelines are leaking.
During reinstallation, the gaps between various components must meet the standards; furthermore, manual rotation of the shaft should occur without any jamming or abnormal noises, which indicates that the equipment has been properly repaired.
During reinstallation, the gaps between various components must meet the standards; moreover, manual rotation of the shaft should occur without any jamming or abnormal noises； During debugging, there is little vibration, no noise, and the temperature meets the requirements. It is generally determined that the equipment has been properly repaired.