Chongqing Holroyd Precision Rotors Manufacturing Co., Ltd
No. 6 Jiangxi Road, Nan'an District, Chongqing, China.
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Points for attention in maintenance process of screw chiller
Screw chiller is one of the chillers, and the screw chiller has the characteristics of high efficiency and low total energy consumption, and has been widely favored by many enterprises. However, no matter what kind of mechanical equipment, in the process of using the need for maintenance, otherwise, do not maintain it well, screw chiller can sometimes cause some minor problems or shorten its service life. Therefore, we must maintain the screw chiller.
Maintenance method of screw chiller:
1. Screw compressor
Screw compressor is a very important component in the unit, and the quality of the compressor is directly related to the stability of the unit.
2. Check the safety valve
The condenser and evaporator of screw chillers are on pressure vessels, according to the regulations, should be in the high end unit is installed on the main body of the condenser safety valve, once the unit is in a normal working environment, safety valve can be automatic pressure relief, pressure to prevent possible damage on the human body. Therefore, the regular calibration of the safety valve is very important for the safety of the whole unit.
3. Refrigerant charge
If there is no other special reason, the unit will not produce a lot of leakage. If there is a certain amount of refrigerant leakage due to improper use or maintenance, it is necessary to add refrigerant again. Refrigerant must be noted when refrigerant is used in the unit.
4. Change the drying filter
Drying filter is an important component to ensure the normal cycle of refrigerant. Because of the water and refrigerant immiscible, if the system contains water, will greatly affect the running efficiency of the unit, so keep the system dry inside is very important, the dry filter inside the filter must be replaced periodically.
5, replace the lubricating oil
After long-term use of screw chillers, the oil quality of lubricating oil will become worse, the impurities and moisture in the oil will increase, affecting the cooling effect of water chillers, so regular observation and inspection of oil quality. Once the problem is found, it should be replaced in time, and the replaced lubricating oil must conform to the technical data.
6. Cleaning of condenser and evaporator
The cooling water of water-cooled condenser is an open cycle circuit, and it is generally used by cooling tower. When the content of calcium salt and magnesium salt in water is large, it is easy to decompose and deposit on the cooling water pipe to form scale, which affects the heat transfer effect. When the fouling is too thick, the circulation section of cooling water will be reduced, the water quantity will be reduced, and the condensing pressure will rise. Therefore, when the water quality of the cooling water is poor, the cooling water pipe is cleaned at least once a year, and the scale and other contaminants in the pipe are removed.