①Maintenance a. Often observe a variety of test instruments readings are normal, especially the speed and shaft power is stable. b. Regularly compress the packing. Such as packing wear can not guarantee the seal should be promptly replaced, the packing should not be pressed too tight, under normal circumstances should be leaked from the stuffing box into a thin water column or drop-shaped, filled into the stuffing box should be full of water, water supply The pressure is (0.5 ~ 1) × 105 Pa. c. Shaft pump temperature not higher than the surrounding temperature 30 ℃, and the absolute temperature value is not higher than 60 ℃. Rolling axis pump room pressure XZG-4 calcium-based grease to full shaft pump room space 2/3 is appropriate. Normal working shaft pump should be loaded 3 to 4 times a year, at least once a year to clean the shaft pump, replace all the lubricating grease. d. The new pump should be checked before starting the fuel tank is sufficient, the lubrication system is reliable, the cooling water is smooth. And check the motor rotation direction is correct, hand pump pump to see if there is no fault (large pumps available intermittent start the motor method). Pump oil should also be discharged to the tank, so as to avoid sudden acceleration due to excessive resistance to damage the motor and pump. If the temperature is too low in winter, the pump should be heated before starting the pump. If the oil viscosity is high at low temperature, if the motor is suddenly started, the motor will overload and damage the pump parts. e. Shut down the valve leading to the vacuum system when stopping, then turn off the motor and open the bleed valve to put the air into the pump to prevent the pump oil from flowing back into the pipe and the vacuum chamber before finally stopping the cooling water. f. Pay attention to the supply of water to make up the water, the temperature of the water flowing out of the pump should not exceed 40 ℃. 9. Winter use, it should be noted that after the pump is stopped and the water in the tank to drain, so as not to freeze the device. h. Under normal circumstances, all the pumps should be disassembled after one year's operation to check the wear and tear of the parts. However, the length of overhaul period may also be discretionary. ② Overhaul a. Overhaul (a) Minor overhaul i. Check and fasten the connecting bolt of each department. ii. Inspect the seal and replace the packing. iii. Check the coupling, replace the elastic rubber ring, check the coaxiality of the coupling. iv. Check the shaft pump and replace the grease (grease). V. clean, check the circulating pump. (b) Overhaul and Overhaul i. Includes minor repairs. ii. Dissolve and inspect the wear and corrosion of the parts, check or replace the parts. iii. Check or correct shaft straightness. iv. Check rotor sway and verify rotor static balance. v. Replace the roller pump oil. vi. Check and adjust the clearance between the two ends of the impeller and the front and back covers. vii. Replace the impeller and sleeve. Viii. Adjust the pump body level. ix. Test vacuum gauge. X. Body painting. b. Maintenance Quality Requirements (a) There shall be no defects such as cracks or large area of ​​blisters between the housing and the cover of the pump cover and the pump cover. (b) SZB type cantilever water ring vacuum pump spindle and impeller i. The spindle should not have defects such as cracks. ii. Shaft and roller pump with H7 / js6 or H7 / k6. iii. Spindle and impeller with H7 / m6. iv. The clearance between the two ends of the impeller and the front and back covers shall comply with the requirements in Table 4-14. V. Straightness of the spindle should not exceed 0.2 ~ 0.4 mm / m. Vi. The blades of the impeller should not have burrs and cracks. Vii. Impeller should be balanced test, the requirements of the relevant technical requirements. Viii Impeller and shaft assembly, its end surface runout should not exceed 0.1 mm.
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