Reasons For High Temperature Of Screw Compressor

Environmental factors, indoor ventilation

A large amount of heat will be generated during the operation of the equipment. If this heat is not exported outside in time, it may cause closed circulation of air in the room. That is, the heat discharged from the heat exchange of the air compressor will be sucked in again from the air inlet of the air compressor, so a vicious cycle , The equipment will continue high temperature. When it is judged according to the ventilation state of the installation site that the ambient temperature exceeds 40 ° C, forced ventilation is necessary.

Precautions for indoor ventilation:

Location of inlet and outlet

The air inlet should be located at a low place in the house as far as possible, and it is not easy to inhale the environmental dust and harmful gases. In the dust and other harsh environments, the air inlet filter device should be properly equipped. The exhaust vent is generally set above the roof or wall, and protective facilities are added.

Exhaust duct

A. The circulation area of the exhaust duct should be large enough;

B. The exhaust duct is as short as possible to reduce the flow resistance. According to the exhaust volume of the compressor, calculate the resistance of the exhaust duct. If the pressure loss exceeds 20Pa, an auxiliary exhaust fan needs to be set;

C. In order to facilitate maintenance, a detachable structure of the exhaust channel can be used, such as canvas or tinplate to connect and balance the wind hood, to avoid excessive drawing and vibration transmission. Flexible adjustable flaps can be installed, and the channel can be closed during winter to avoid low temperatures.

2. The cooler is clogged

The cooler has air-cooled plate-fin heat exchanger and water-cooled shell and tube heat exchanger. With the passage of time, the cooler will block due to the environment or the quality of the cooling water. This can be passed through the inlet and outlet of the cooler The temperature difference can be confirmed. The plate-fin heat exchanger is a heat exchange tube bundle composed of a rectangular plate and a heat exchange tube. For the blockage of the air-cooled heat exchanger, it can be repeatedly purged with compressed air of 0.2MPa or more. For water-cooled tube heat exchangers, it is mainly composed of two parts: the outer shell and the inner cooler. Because the equipment of different manufacturers may have different pipe-side and shell-side flow media and different cooling water quality on site, the blocking of the tube heat exchanger needs Cycle cleaning through different chemicals.

3. Insufficient cooling water and cooling air volume

Insufficient cooling air volume

Check whether the fan start and stop temperature of the control panel is set reasonably and whether the cooling fan operates or is damaged in a timely manner; the air inlet dust screen should be periodically purged to prevent clogging; in addition, the design and installation of the exhaust channel is unreasonable, the exhaust volume is too small or the channel Large resistance will affect the air volume of the equipment, resulting in an increase in the exhaust temperature of the air compressor.

Insufficient cooling water

Check the temperature of the cooling water. The high water temperature makes the temperature between the cooling water and the lubricating oil shrink, reducing the heat exchange effect. In addition, the amount of cooling water is insufficient, and the heat of the high-temperature lubricating oil cannot be cooled by the circulating cooling water in time, resulting in higher and higher temperatures. Usually the cooling water return water pressure is not less than 0.15MPa.