【Mechanical Equipment Technology Edition】Daily Question 20171114: Lubrication System of Screw Compressor Units (4)
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This post was last edited by YORK Industrial Refrigeration on 2017-11-17 at 15:06. Starting from now, in order to enhance communication among users, we have launched the \"One Question per Day\" activity in 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 scoring will be given after that period. Building on the information regarding oil cooling provided in the previous issue, this time we will focus on the issues related to oil temperature regulation. Since the temperature of the oil coming out of the oil cooling system is relatively low, a valve is used here – namely, the oil temperature control valve. Please refer to the diagram below: ABC represent the three ports of the oil temperature control valve. How does the oil temperature control valve regulate the oil temperature? (Hint: Use the three ports A, B, and C to explain this.) Answer: When the unit is started and the oil temperature is low, ports B and A are connected. As the oil temperature rises, the temperature sensor heats up, causing the internal valve element to move and connecting port C to port A. Depending on the temperature, the extent to which the valve element moves varies (just like in a expansion valve), and as a result, the flow rate between ports C and A also changes. ================================ 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 Grasso 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=1786445
a represents the outlet; when the oil temperature is high, port b is closed and port c is opened. When the oil temperature is low, port b is opened and port c is closed. It is also possible to open both ports b and c simultaneously to jointly regulate the oil temperature
a represents the outlet; when the oil temperature is high, port b is closed and port c is opened. When the oil temperature is low, port b is opened and port c is closed. It is also possible to open both ports b and c simultaneously to jointly regulate the oil temperature
This is a three-way valve; when the oil temperature is high, port B is closed to a smaller degree while port C is opened wider to allow the oil to flow through the cooler, thereby reducing the temperature of the returning oil.
a represents the outlet; when the oil temperature is high, port b is closed and port c is opened. When the oil temperature is low, port b is opened and port c is closed. It is also possible to open both ports b and c simultaneously to jointly regulate the oil temperature.
If the temperature of A is too low, increase B; increasing B means decreasing C at the same time. If the temperature of A is too high, decrease B; decreasing B means increasing C at the same time
C is the cold oil inlet, B is the hot oil inlet, and A is the mixed oil outlet. Under normal conditions, input is at port C and output is at port A.
C is the cold oil inlet, B is the hot oil inlet, and A is the mixed oil outlet. Under normal conditions, input is at port C and output is at port A. When the oil temperature is below the set value, the temperature-sensitive medium in the valve chamber contracts, and the return spring pushes the valve element at port B upward, allowing hot oil to flow into the valve from port B and mix with the cold oil until the oil temperature returns to normal. When the oil temperature is higher than the set value, the temperature-sensitive medium in the valve chamber expands, and the return spring pushes the valve element at port B downward, reducing the amount of hot oil that enters the interior of the valve through port B, until the oil temperature returns to normal.
C is the cold oil inlet, B is the hot oil inlet, and A is the mixed oil outlet. Under normal conditions, input is at port C and output is at port A. When the oil temperature is below the set value, the temperature-sensitive medium in the valve chamber contracts, and the return spring pushes the valve element at port B upward, allowing hot oil to flow into the valve from port B and mix with the cold oil until the oil temperature returns to normal. When the oil temperature is higher than the set value, the temperature-sensitive medium in the valve chamber expands, and the return spring pushes the valve element at port B downward, reducing the amount of hot oil that enters the interior of the valve through port B, until the oil temperature returns to normal.
C is the cold oil inlet, B is the hot oil inlet, and A is the mixed oil outlet. Under normal conditions, input is at port C and output is at port A. When the oil temperature is below the set value, the temperature-sensitive medium in the valve chamber contracts, and the return spring pushes the valve element at port B upward, allowing hot oil to flow into the valve from port B and mix with the cold oil until the oil temperature returns to normal. When the oil temperature is higher than the set value, the temperature-sensitive medium in the valve chamber expands, and the return spring pushes the valve element at port B downward, reducing the amount of hot oil that enters the interior of the valve through port B, until the oil temperature returns to normal.
a represents the outlet; when the oil temperature is high, port b is closed and port c is opened. When the oil temperature is low, port b is opened and port c is closed. It is also possible to open both ports b and c simultaneously to jointly regulate the oil temperature