[Q&A Question 180] 2017.06.29
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This post was last edited by 955559 on 2017-7-21 23:04. [Q&A Question 180] June 29, 2017: What are the reasons for insufficient displacement in piston compressors? (Five answers will earn full marks.) Reference answers can be seen after replying; scoring is based on identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. The reasons for insufficient displacement are: (1) The clearance volume is too large. (2) Function of the top valve device (3) Poor sealing of the piston rings. (4) Packing box leakage. (5) The intake and exhaust valves are not sealed properly. (6) The opening and closing resistance of the suction and exhaust valve discs is high, and it does not happen in a timely manner. (7) The bypass valve is not closed properly. (8) Low inhalation pressure. (9) High inhalation temperature. (10) As the components of the inhaled gas become lighter, the flow meter reading will also decrease. 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 1 Wealth point will be given to the participant. For continuous malicious spamming, 2 Wealth 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 starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) 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
The piston ring clearance is too large; the clearance adjustment is incorrect; there are leaks in the intake valve and the exhaust valve; the unloader is malfunctioning
1. Clogged inlet pipeline or filter. 2. Worn piston rings. 3. Improper sealing of intake and exhaust valves. 4. Failed poppet valve. 5. High intake temperature or poor cooling effect in the cylinder block, etc
1. Insufficient load 2. Air valve leakage 3. High back pressure 4. Insufficient feed gas 5. Excessively high temperature
1. Low intake pressure； 2. High intake air temperature ； 3. Excessive clearance between the front and rear dead centers of the piston ； 4. The piston rings are severely worn ； 5. Sealing filler has severe air leakage ； 6. The air valve is not working properly.
The reasons for insufficient displacement in piston compressors include: ① An overly large clearance volume. ② Function of the top valve device. ③ The piston ring seal is not tight enough. ④ Gland leakage. ⑤ The intake and exhaust valves are not sealed properly. ⑥ The opening and closing resistance of the suction and exhaust valve discs is high, and this issue is not addressed in a timely manner. ⑦ The bypass valve is not closed properly. ⑧ Inspiratory pressure is low. ⑨ The inlet temperature is high. ⑩ As the components of the inhaled gas become lighter, the flow meter reading will also decrease.
1. Insufficient inlet flow, 2. Excessive back pressure, 3. Low inlet pressure, 4. Low compressor load, 5. Compressor failure, 6. Excessive return valve opening
1. Compressor stall. 2. Improper adjustment of piston clearance. 3. Unloading valve failure. Fault in the stage 4 cooler. 5. The air valve is installed in the wrong direction. 6. Piston breakdown. 7. Air leakage from cylinder gaskets, valve gaskets, valve cover gaskets, pipelines, etc.
1. Compressor stall. 2. Improper adjustment of piston clearance. 3. Unloading valve failure. Fault in the stage 4 cooler. 5. The air valve is installed in the wrong direction. 6. Piston breakdown. 7. Air leakage from cylinder gaskets, valve gaskets, valve cover gaskets, pipelines, etc.
This post was last edited by wangld on 2017-6-29 08:13 (1). The clearance cavity is too large. (2) Function of the top valve device (3) Poor sealing of the piston rings. (4) Packing box leakage. (5) The intake and exhaust valves are not sealed properly. (6) The opening and closing resistance of the suction and exhaust valve discs is high, and it does not happen in a timely manner. (7) The bypass valve is not closed properly. (8) Low inhalation pressure.