5 General rules and specifications for screw air compressors

1. Screw air compressors：Regularly replace consumables

The consumables of screw compressors mainly include air intake filters, oil filters, oil filter elements and lubricating oil.

The use status of consumables has a significant impact on the performance and reliability of the compressor. If the air intake filter and oil filter element are blocked, the air intake volume will be reduced, the internal pressure ratio of the machine will increase, the temperature will rise, and the motor load will increase.

After the air intake filter is blocked, a large amount of dust will be pushed into the system under the pressure difference between the inside and outside of the filter element, which will seriously pollute the lubricating oil and greatly shorten the life of the lubricating oil, oil filter element, oil filter and oil cooler. The key to the reliable operation of the screw compressor is to replace consumables in time.

2. Purchasers and operators and maintenance personnel should carefully read the instruction manual

The product instruction manual makes detailed and specific provisions for the maintenance and operation of the compressor, and clearly explains the conditions of use, applicable environment, maintenance cycle and content.

There is a description of the replacement cycle of consumables, and it also reminds users to make adjustments according to changes in the use environment. The instruction manual provides guidance and suggestions on the installation site of the machine, the ventilation volume of the air compressor station, the specifications of the power supply cable and air switch, the water supply pressure and flow, and the exhaust pipe size.

The instruction manual will also give a detailed description of the principle and structure of the machine. People with basic electromechanical knowledge can make correct judgments and handle common problems by reading carefully. The instruction manual generally provides many tips for operators and maintenance personnel. Before purchasing the machine, you should ask the relevant manufacturer to provide the machine’s instruction manual, read the instruction manual carefully, and stipulate that the machine instruction manual is an annex to the contract in the purchase contract.

screw air compressors

3. Operators should carefully keep daily operation and maintenance records.

The machine operation record is an important basis for analyzing, judging and predicting the machine status. The machine operation record is also the main basis for formulating the maintenance cycle.

The machine operation record should include: exhaust pressure, head exhaust temperature, oil core front internal pressure, main motor current and daily start-up and shutdown time and other parameters. The accuracy of the relevant instruments should be calibrated regularly. In addition, the date of replacement of consumables and maintenance time should be recorded in detail.

4. Rust removal and rust prevention of oil and gas separation tank

The oil separator tank of the screw compressor works under high temperature and high humidity, and internal rust of the oil separator tank is inevitable. When replacing the oil separator core, the rust on the upper part of the oil separator tank should be cleaned at the same time.

After shutdown, the water in the oil separator tank will gather at the bottom of the oil separator tank, and the water should be drained once a day before starting up. If the screw compressor does not run for a long time, the oil should be changed and the oil seal should be performed. Some brands of oil return pipelines and control pipelines will use carbon steel pipes and carbon steel joints, and their internal rust should be cleaned regularly.

5. The use conditions of the screw compressor should be as close as possible to the machine design parameters

The exhaust pressure of the screw compressor should be controlled within the allowable range. If the exhaust pressure is set too high, it is easy to cause the motor to overload. If the working pressure is too low for a long time, the oil consumption will increase. The fundamental reason for the low pressure of the pipeline network is that the exhaust volume of the compressor cannot meet the gas consumption.

screw air compressors

2 Reasons for lack of oil in screw air compressor

Reasons for changes in the exhaust volume of screw compressors