The screw compressor is a long-term high-speed operation equipment. To guarantee good operation under high-intensity operation, the parts need good lubrication. At this time, our lubricant is instrumental, but in daily production, we will encounter the situation of lack of oil in the unit.
Key Takeaways
- Record the exact symptom, operating hours, and ambient conditions before calling a technician.
- Power down and isolate power before inspecting any mechanical or electrical component.
- Address the root cause rather than resetting alarms repeatedly; repeating alarms signal an unresolved malfunction.
Analysis of the causes for lack of oil in screw compressor:
The filter element of the oil-gas separator is too dirty or blocked.
If it is too dirty, it will affect the normal circulation of the lubricant and cause the equipment to overheat and power down. This situation depends on the pressure difference before and after loading.
When the pressure difference before and after the screw compressor is 3 times that when the unit is started or the Z pressure difference reaches 0.1MPa, it should be cleaned or replaced.
The oil shut-off valve of the screw compressor is faulty.
There is an oil shut-off valve between the lubricant filter and the compressor. When the oil shut-off valve cannot be opened, the temperature of the screw compressor rises rapidly after starting due to the lack of oil lubrication and cooling, and it stops automatically after a few seconds.
Eliminate the temperature sensor at the exhaust end of the main compressor. It was found that the temperature sensor was dry and oil-free, and green smoke floated out of the hole.
Open the manhole at the bottom of the screw compressor, eliminate the oil shutoff valve, and gently turn the valve stem with your fingers to see if it can be pushed back and forth and easily reset. If it is difficult to dial or reset, the oil shutoff valve needs to be further disassembled.
If the valve stem or valve hole is oily, use fine sandpaper to polish it until it slides easily; if the spring is broken or foreign objects are stuck, it will also affect the movement of the valve stem. At this time, it is necessary to replace the spring or clean the spring and spring seat.
Furthermore to the above causes, when choosing lubricant, it is recommended to use lubricant according to the manufacturer’s requirements. Secondly, check the oil level and color of the lubricant regularly.
What is the difference between oil-free compressor and oil-containing compressor?
Causes for changes in the air delivery of screw compressors
- Technology configuration
- Strike Cost
- Import and ship assistance
Selection and Sizing Considerations
Record the exact symptom, operating hours, and ambient conditions before calling a technician. Power down and isolate power before inspecting any mechanical or electrical component. Address the root cause rather than resetting alarms repeatedly; repeating alarms signal an unresolved malfunction.
Frequently Asked Questions
What should I check first when a compressor will not start?
Confirm power supply, control settings, and emergency stop status, then check the pressure switch and any start protection devices.
Why does my compressor run hot?
Common causes are restricted airflow, low oil level, a blocked cooler, or high ambient temperature. Clean the cooler and verify lubrication first.
What does excessive oil consumption mean?
It usually indicates worn separator elements, overfilling, or a leak in the oil circuit. Inspect the separator and seals.
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