[Mechanical Equipment Technology Edition] Daily Question 201808023: Refrigeration Systems—Case Analysis (2.2)
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This post was last edited by YORK Industrial Refrigeration on 2018-8-25 at 08:34. This year’s 【Daily Question】is divided into three categories: screw refrigeration compressors, refrigeration systems, and oil circuit systems, aiming to provide a comprehensive understanding of refrigeration technology. (If you encounter something you don’t know or can’t answer, please actively look up information; as you do so, your skills will improve!) ) Those who comment on this post will receive 1-3 units of wealth as a reward; those who give complete answers will receive 10-15 units, with the reward valid for two days. Based on Figures 1, 2, and 3, briefly describe the flow of the oil circuit. Answer: First branch: During startup pre-lubrication, high-temperature, high-pressure gas is sent to the oil separator – the oil is separated there – then the refrigerant oil enters the oil-cooled cooler – followed by the crude oil, the oil pump, and finally the refined oil, which goes to the load/unload solenoid valves as well as the front and rear bearings. After pre-lubrication, high-temperature, high-pressure gas is sent to the oil separator – the oil is separated there – then the refrigerant oil enters the oil-cooled cooler – followed by the crude oil, the oil pump’s bypass system, the refined oil, and then to the load/unload solenoid valves as well as the front and rear bearings. Second branch: High-temperature, high-pressure gas is sent to the oil separator – the oil is separated there – then the refrigerant oil enters the oil-cooled cooler – followed by the crude oil, which is used to lubricate the compressor screws. (Figure 1) (Figure 2) (Figure 3) ============================== Premium recommendations: Industrial equipment – Videos on the repair and adjustment of York compressors: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Industrial equipment – Procedures for maintaining York screw compressors: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Industrial equipment – Upgrading York Quontum control systems: https://bbs.hcbbs.com/thread-1804837-1-1.html Industrial equipment – Major repairs of GEA Grasso screw compressors: https://bbs.hcbbs.com/thread-1800467-1-1.html Industrial equipment – Disassembly and maintenance of British HOWDEN screw compressors: https://bbs.hcbbs.com/thread-1832529-1-1.html Industrial equipment – Disassembly and maintenance of Japanese MYCOM screw compressors: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
Oil pump, oil flow, oil cooling, oil content
Simple process: 1. The refrigerant gas and oil are separated in the oil separator; the oil remains in the separator and, under pressure, enters the oil cooler to be cooled. 2. Under pressure, the oil in the oil cooler passes through the coarse oil filter and then splits into two paths: a) one path returns to the oil consumption points of the unit via a check valve, while b) the other path is pressurized by the oil pump, passes through the fine oil filter, and is sent to the control oil system of the unit.
Compressor outlet → Separator → 1 return oil line 2 to cooler → Coarse filter → 1 return line for unit lubrication 2 to lubricating oil pump → 1 pressure stabilization and return line 2, passing through a fine filter to that device with a ‘T’ symbol whose name I don’t know → 1 several lubricating oil lines leading to the compressor 2, controlled by solenoid directional valves to move the slide valves. Brother, your drawings are really old; I’ve never seen them before.
Oil separator ------- Oil cooler --------- Coarse filter ---------- Oil pump--------- Fine filter--------- Load control system Coarse filter ------------ to the unit’s lubrication and fuel injection components
Press outlet → Separator → Cooler → Filter → Oil application point
Simple process: 1. The refrigerant gas and oil are separated in the oil separator; the oil remains in the separator and, under pressure, enters the oil cooler to be cooled. 2. Under pressure, the oil in the oil cooler passes through the coarse oil filter and then splits into two paths: a) one path returns to the oil consumption points of the unit via a check valve, while b) the other path is pressurized by the oil pump, passes through the fine oil filter, and is sent to the control oil system of the unit.
It would be better if Hai could be more detailed~~