Self-priming vacuum pump precautions

Vacuum pump is the use of mechanical, physical, chemical or physical and chemical methods of pumping the container was evacuated to obtain the vacuum device or device. In the popular sense, vacuum pumps are devices that use a variety of methods to improve, create, and maintain a vacuum in a confined space. Next Xiaobian introduce self-priming vacuum pump for your reference. Self-priming vacuum pump precautions First, the preparation before the start of inspection 1, according to the working conditions of the vacuum pump, respectively, the use of high-quality calcium-based butter and oil lubrication, if the use of butter lubrication of the vacuum pump should be periodically added to the bearing box Butter, pump lubricated with oil, add oil if insufficient. 2, check the vacuum pump shell liquid is higher than the upper edge of the impeller, if insufficient, from the vacuum pump housing directly on the liquid inlet into the pump body liquid storage, should not start running liquid storage inadequate , Otherwise it can not work, and easy to damage the mechanical seal. 3, check whether the rotating parts of the vacuum pump bump card phenomenon. 4, check the bottom of the vacuum pump body and the joints at the nut loose phenomenon. 5, check the vacuum pump shaft and motor spindle coaxial and parallelism. 6, check whether the import pipeline leakage, if leaks, we must try to rule out. 7, open the suction pipe valve, slightly open (do not fully open) outlet control valve. Second, start and operation 1, jog pump, pay attention to the steering shaft is correct. 2, pay attention to whether there is no abnormal rotation and vibration. 3, pay attention to the pressure gauge and vacuum gauge reading, after the start when the pressure gauge and vacuum gauge readings after a period of fluctuation and indicate stability, indicating that the pump has been on the liquid, into the normal infusion operation. 4, the vacuum pump into the normal infusion operation before self-absorption process, special attention should be paid to increase the water temperature inside the vacuum pump, if this process is too long, the pump temperature is too high, then stop the pump to check the reason. 5, if the vacuum pump liquid temperature is too high and cause self-absorption difficulties, then you can temporarily shut down, the use of liquid discharge pipe back to the pump back to the pump or add liquid storage port directly to the pump to replenish the liquid, so that the pump The liquid cooling, and then start. 6, vacuum pump in the course of work as a strong vibration and noise, there may be pump cavitation caused by cavitation have two reasons: First, the import pipe flow rate is too large, and second, the suction stroke is too high. When the flow rate is too large, the outlet control valve can be adjusted to increase the pressure gauge readings, which should be promptly removed when there is a blockage in the inlet pipe. When the suction stroke is too high, the installation height of the pump may be properly reduced. 7, the vacuum pump in the course of work for some reason to stop the pump, need to restart, the outlet control valve should be slightly open (do not fully closed), so that both self-priming gas discharge from the spit, but also to ensure that the sharp tip Under the responsibility of starting. 8, pay attention to check the pipeline system leakage. Third, stop the pump 1, must first close the discharge valve on the pipeline. 2, to stop the vacuum pump rotation. 3, in the cold season, should be stored in the body of the pump body and bearing body cooling water in the room to vent to prevent cracking parts. (Editor: Li Juan)

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