Hot weather has arrived, and screw air compressors are truly annoying!
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Two 180 Shanghai-made machines, with maintenance costs of less than 20,000 per time. After this maintenance, the engine oil temperature is 105 degrees. I’m not sure what the reason for this is Dear fellow sailors, please help me analyze this situation: after performing post-cooling cleaning, and with new lubricant as well as all three filters installed, the oil temperature of the unit rises to 105 degrees just 20 minutes after it starts running.
This post was last edited by ZHANGZHANTJ on 2015-8-3 12:56. What was the exhaust temperature before maintenance? Measure the inlet and outlet temperatures of the cooler (on the coolant side), as well as the temperatures at various points of the temperature control valve (three-way valve), to verify whether the temperature control valve is functioning properly. Before routine unit maintenance, it is necessary to record all operating parameters (some of which may not be included in the parameter reports), so that comparisons can be made after the maintenance is completed, facilitating the assessment of its effectiveness.
Measure each set of data, check against the corresponding instructions, and see which data is incorrect.
For industrial screw compressors, domestic products are not yet good enough. . . There’s nothing to do. . . The engine oil temperature is 105 degrees. . . Is it mainly to cool the bearings?
Is your engine unit dry-type or wet-type? What is the exhaust temperature of the unit? If the lubricating oil system is separate, then there is definitely a problem with the oil cooler
Should we check the bearing clearance?
The oil temperature is high; is the circulating water in the oil cooler working properly? The inter-stage coolers and oil coolers here are often clogged with sediment, resulting in poor heat exchange.
Close the temperature control valve and let it flow directly through the cooler
I’ve encountered this problem recently as well: with two units of 150 capacity, one maintains a temperature of around 85°C, while the other is at around 100°C. The maintenance company replaced the oil filter for the first time, but it didn’t have any effect. The temperature control valve was checked and there was no problem. The oil cooler was cleaned with carbon removal agent for the second time, but the temperature remained high after it was turned on. A new nozzle was used for testing in the third attempt, yet the temperature was still high. In the end, it had to be concluded that our oil cooler had been in use for many years and was severely clogged with carbon deposits. The maintenance company is unable to provide a clear analysis of the reasons, and our own workshop lacks the capability to handle it – it’s really frustrating! :Q
Was only the tube side of the after-cooler cleaned? If necessary, the shell side also needs to be cleaned. Is there severe carbon buildup in the oil circuit system? In our company’s 160kw units, there is significant carbon buildup, so the entire engine head as well as the oil circuit system need to be cleaned. I’m not sure what the ambient temperature is in your environment; a temperature of around 100 degrees is considered normal. Also, it’s necessary to verify whether the flow rate of the cooling water is sufficient
The outlet temperature should not exceed 100°. Replace the cooler filter element, and check the pressure difference between the inlet and outlet of the precision filter to see if it’s time to replace the coolant