Before preparing a new compressor after setup, or restarting it after shutting down, it is best to first confirm whether these parameters have been calibrated.
Key Takeaways
- Follow the documented startup and power-down sequence every time; shortcuts cause pressure shocks and wear.
- Keep the compressor room ventilated, clean, and free of combustible material.
- Train operators to recognize abnormal noise, vibration, and warning indicators before they escalate.
1.Host steering
If the main power supply has been removed during the upkeep of the screw compressor, focus on the forward and reverse rotation of the motor after reconnecting the power. The steering of the motor should be based on the steering of the main unit. For the correct rotation of the compressor main unit, please check the steering direction marked on the main unit. icon.
Correction method: Just swap any two power lines in the three-phase power supply.
2.Coupling
If the compressor is driven by a belt, the tightness of the belt should be between 10 and 20 mm. If the compressor is driven by a coupling, after setup, turn the motor and host by hand and check when the coupling rotates. balance. Compressor couplings basically use elastic couplings, and they can be ignored when the balance deviation is not large.
3. Load/unload cycling ratio value
When setting these three parameters, the unloading value should be determined first. The unloading value should be determined based on the rated pressure of the screw compressor and the pressure required at the gas end. After the unloading value is determined, the loading value should be set. The difference between the two should be determined. The pressure difference should be between 0.1~0.2Mpa. After setting the unloading and loading values of the screw compressor, finally set the proportion value. The proportion value should be set between the unloading value and the loading value.
Correction method: Set this parameter in the microcomputer controller (if the screw compressor is controlled by buttons, the load/unload cycling parameters should be adjusted from the pressure switch, and the proportional value should be at the adjusting nut of the proportional valve on the unloading valve. Adjust this value.
4.High temperature protection value
When the screw compressor is working normally, its temperature should be between 65~98℃. The automatic power-down temperature of over-temperature protection shall not exceed 105°C.
5. Unit internal pressure
The internal pressure of the unit should be between 0.2~0.45MPa.
Correction method: The pressure value should be carried out when the unit is unloaded and running. The value should be adjusted on the adjusting nut of the minimum pressure valve. To facilitate reading of the set value, the pressure detection point should be taken before the minimum pressure valve and the pressure should be installed. surface.
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Frequently Asked Questions
What should I check before starting a compressor?
Check oil level, condensate drains, inlet filters, belt tension, and that all safety guards are in place.
Why does the machine need to warm up or cool down?
Proper warm-up distributes lubricant, and a controlled shutdown lets the unit depressurize and cool evenly.
How much clearance does a compressor need around it?
Follow the manufacturer clearance for intake, exhaust, and service access, typically at least one meter around the unit.
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