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1. The main reason is nothing more than the leakage caused by improper installation. For this reason, we can take the following measures to avoid it: Strictly follow the requirements of the mechanical seal instruction manual for installation and operation. The tightening of the gland should be done after the coupling is aligned. The bolts should be tightened evenly to prevent the pressure surface from deflecting. Operators should check each point with a feeler gauge, and the error should not exceed 0.05 mm, after the rotary face of the mechanical seal is installed, it must be able to move flexibly on the shaft, and it should be able to spring back automatically after pressing the rotary face to the spring.
2.1. The measures to improve the quality of oil products are mainly to replace the filter screen with a higher mesh number, filter out the impurities in the oil product as much as possible, and clean the filter screen in time. Carry out periodic maintenance in strict accordance with the maintenance operating procedures of the screw pump, and regularly clean the oil tank of impurities to prevent the sediment in the oil from entering the screw pump and causing damage to the mechanical seal.
2.2. During the operation of the screw pump, the oil quality requirements in the handover agreement should be strictly followed, and the oil delivery temperature should be reduced as much as possible to prevent the accumulation of carbon substances in the oil on the sealing surface of the mechanical seal, thereby prolonging the service life of the seal.
2.2. During the operation of the screw pump, the oil quality requirements in the handover agreement should be strictly followed, and the oil delivery temperature should be reduced as much as possible to prevent the accumulation of carbon substances in the oil on the sealing surface of the mechanical seal, thereby prolonging the service life of the seal.
2.Economic Benefits brought about by the above measures are as follows:
The service time of foreign mechanical seals is generally 5000 hours, but due to the different processing technology and materials of mechanical seals, plus the above-mentioned reasons, the actual service time of domestic mechanical seals is about 4000 hours.
The service time of foreign mechanical seals is generally 5000 hours, but due to the different processing technology and materials of mechanical seals, plus the above-mentioned reasons, the actual service time of domestic mechanical seals is about 4000 hours.
Since 2012, the oil delivery team of the oil and gas storage and transportation company had taken various measures to increase the service time of mechanical seals from the original 3020 hours to the current 4500 hours at multiple crude oil delivery stations. Calculated according to the start-stop cycle of the screw pump, the mechanical seal time of each screw pump had been extended for about half a year. In 2011, 24 sets of equipment used 19 sets of mechanical seals. In 2013, 27 sets of equipment used 15 sets of mechanical seals.
Excluding the factor of natural adding of equipment , 6 sets of mechanical seals were reduced year-on-year. Calculated at 5,000 yuan for each mechanical seal, it was equivalent to a direct economic benefit of 30,000 yuan. Due to the increase of the safe service period of the mechanical seal, mechanical failures such as locked equipment bearings and other mechanical failures caused by it were avoided, resulting in greater economic benefits.
