【Q&A Question 169】June 18, 2017
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This post was last edited by 955559 on 2017-7-21 23:10. [Q&A Question 169] June 18, 2017: What are the symptoms of overheating in a vacuum pump cylinder, and how should it be dealt with? The reference answers can be seen after *responding*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Phenomena: 1. Smoke emerges from the outer wall of the cylinder; in some cases, the paint changes color and cracks. 2. Blue smoke is emitted from the waste gas outlet pipe of the pump. 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Treatment: Prolonged overheating of the cylinder can cause damage to the pump body; it is necessary to conduct an immediate inspection to identify and resolve the issue. Check the cooling water system and increase the amount of cooling water used. If this does not yield results after some time, replace the pump. Scoring criteria: 2 Wealth points for incorrect responses; *incomplete* answers earn 3–8 points. 10 Wealth points are given for correct answers accompanied by detailed explanations; responses that are correct but lack sufficient details earn 15–20 Wealth points. Please score according to these criteria. Note: If there are editing records after answering, only those who participated will be given points. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming. Points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates have started) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have started) 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
Phenomena: 1. Smoke emerges from the outer wall of the cylinder, and even the paint may change color or crack; 2. Blue smoke comes from the discharge pipe of the pump; 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Solution: Prolonged overheating of the cylinder can cause damage to the pump body and the piston rings. It is necessary to check the pump’s cooling system as well as the condition of the equipment connected ahead of it. If that doesn’t work, the pump should be replaced.
Phenomena: 1. Smoke emanates from the outer wall of the cylinder; in some cases, the paint changes color and cracks. 2. Blue smoke comes from the discharge pipe at the pump’s outlet. 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Treatment: Prolonged overheating of the cylinder can cause damage to the pump, so it is necessary to conduct inspections promptly and address any issues found. Check the cooling water system and increase the amount of cooling water used. If this does not resolve the problem, replace the pump.
There is noise, efficiency is reduced; handle liquid removal and replace the lubricating oil
Phenomenon: 1. Smoke comes from the outer wall of the cylinder, and even the paint changes color and cracks； 2. Blue smoke coming from the pump outlet drain pipe ； 3. The temperature of the inhaled gas is higher than the normal operating temperature. Solution: Prolonged overheating of the cylinder can cause damage to the pump body; it is necessary to conduct an immediate inspection to identify and resolve the issue. Check the cooling water system, increase the amount of cooling water used, and if this does not yield results after some time, replace the pump.
Phenomena: 1. Smoke emanates from the outer wall of the cylinder; in some cases, the paint changes color and cracks. 2. Blue smoke comes from the discharge pipe at the pump outlet. 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Treatment: Prolonged overheating of the cylinder can cause damage to the pump body; it is necessary to conduct an immediate inspection to identify and address the issue. Check the cooling water system and increase the amount of cooling water used. If this does not yield results after some time, replace the pump.
The vacuum level drops and the load increases； Increase water supply
Phenomena: 1. Smoke emerges from the outer wall of the cylinder, and even the paint may change color or crack; 2. Blue smoke comes from the discharge pipe at the pump outlet; 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Solution: Prolonged overheating of the cylinder can cause damage to the pump body; it is necessary to conduct inspections promptly to identify and address the issue. Check the cooling water flow and increase the amount of cooling water used. If this does not yield results after some time, replace the pump.
Phenomena: 1. Smoke emanates from the outer wall of the cylinder; in some cases, the paint changes color and cracks. 2. Blue smoke appears from the discharge pipe of the pump. 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Treatment: Prolonged use of the cylinder can cause damage to the pump, so it is necessary to conduct inspections promptly to identify and resolve such issues. Check the cooling water system and increase the amount of cooling water used; if there is no improvement after that, replace the pump
1. Smoke emerges from the outer wall of the cylinder; in some cases, the paint changes color and cracks. 2. Blue smoke is emitted from the waste gas outlet pipe of the pump. 3. The temperature of the gas being drawn in is higher than the normal operating temperature. Solution: Prolonged overheating of the cylinder can cause damage to the pump body; it is necessary to conduct inspections promptly to identify and resolve the issue. Check the cooling water system and increase the cooling capacity. If this does not work after some time, replace the pump.