The routine maintenance method of shaft sealing water is actually used, and the shaft sealing water control is not in place, resulting in a lot of losses. If the shaft seal is not good, the filling port leaks, affecting the pump flow and pressure, which affects the entire production system. If the packing is pressed too tightly, the pump starting resistance will increase and it will generate heat when rotating. The post work should always check the shaft seal water pressure and flow. The method is to check the opening degree of the shaft sealing water pipe and the temperature of the filling box. If the temperature is high, the water quantity is insufficient; the leakage amount of the shaft sealing water is often detected. When the leakage amount is increased, the packing gland bolt should be adjusted in time. Replace the packing, replace the packing does not work, should consider the bushing wear and other reasons; under normal circumstances, generally replace the packing once 1 to 2 weeks, the length of the packing is determined by the length of the circumference of the sleeve, the ring is filled When interlacing 120°, and the packing should be suitable, it should not be replaced; after each replacement of the packing, the shaft sealing water leakage should be observed on the spot after starting the vehicle, and it is better to make the dripping into a point. Therefore, the operator's manipulation of the shaft seal water relies entirely on personal skills and responsibility.
Since the conveying medium of the slurry pump of the coal preparation plant is mostly mineral fine particles, it is easy to contaminate the packing, which will aggravate the wear of the packing and the bushing. The maintenance of the packing is about 80% of the maintenance of the slurry pump. The purpose is to maintain the normal supply of the shaft sealing water and give full play to the performance of the pump. At present, there are problems in the use and design of shaft sealing water. Many shaft sealing water systems of coal preparation plants are mostly connected with cooling water, and sometimes a main pipe is provided for cooling water and shaft sealing water. The cooling water is the cooling oil tank. The pressure of the cooling water is generally 0.05-0.2 MPa, the flow rate is 1-3 m3/h, and the pressure and flow rate are slightly lower than the shaft sealing water. Therefore, for cooling, the same water supply system can be used. fulfil requirements.
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