【Daily Question No. 338】December 10, 2018
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【Daily Question No. 338】December 10, 2018: Please discuss the common problems that reciprocating compressors encounter in winter This is a discussion question; points will be awarded for reasonable arguments, and no correct answer is provided. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
Low temperatures in winter are mainly caused by the properties of the fluid, and these fluid properties represent a type of mechanical-thermodynamic failure characterized by temperature differences, pressure abnormalities, and insufficient exhaust volume. The main causes of failures are problems with components such as the intake filter, piston rings, valves, and cooling water circuits; such issues can be diagnosed using parameter analysis.
After shutting down the machine in winter without draining the cooling water from the cylinders and cylinder heads, the cooling water freezes and can rupture the cylinders and cylinder heads, causing the piston rods to break
1. The oil pressure at the pump shaft is too low, preventing the standby pump from stopping. 2. Depending on the properties of the medium, liquid may be present in the liquid separation tank at the high-pressure outlet.
This post was last edited by pdf1314 on 2018-12-10 at 11:06. Pipeline freezing and blockages are caused by excessive viscosity of the lubricating oil, as well as insufficient lubrication circulation, which leads to a decline in lubrication levels; instruments and control valves also suffer from malfunctioning or inaccurate functioning due to freezing. The preparation time required to get the backup cooling unit ready for operation needs to be increased
In winter, low temperatures can easily cause issues such as abnormal temperature differences, pressure abnormalities, and insufficient exhaust volume in reciprocating compressors. The main reason is failures in components such as the intake filter, piston rings, valves, and cooling water circuits.
Pipeline freezing and blockage are caused by excessive viscosity of the lubricating oil and insufficient lubrication circulation, which leads to a decline in lubrication; instruments and control valves are affected by freezing and thus become distorted or stop functioning； The preparation time for starting the backup chiller when it is in standby mode needs to be extended. Pay attention to the appropriate use of low-temperature lubricants, especially for outdoor units in cold regions, where extra care is required
Pipeline freezing and blockage are caused by excessive viscosity of the lubricating oil and insufficient lubrication circulation, which leads to a decline in lubrication; instruments and control valves are affected by freezing and thus become distorted or stop functioning； The preparation time for starting the backup chiller when it is in standby mode needs to be extended. Pay attention to the appropriate use of low-temperature lubricants, especially for outdoor units in cold regions, where extra care is required
Compressed gas is prone to carrying liquid; a drop in oil temperature increases viscosity, which affects the lubrication of the bearing shells
In winter, low temperatures can easily cause issues such as abnormal temperature differences, pressure abnormalities, and insufficient exhaust volume in reciprocating compressors. The main reason is failures in components such as the intake filter, piston rings, valves, and cooling water circuits.