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Knowledge of chemical pumps 2

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Analysis of five technologies of maintaining high yield of screw pump and gear pump

World general mechanical production method is the screw pump, gear pump pumping, and its common homework topic is the pump can not be full of completely

The technology constantly surpasses the working principle, operation and maintenance steps of the screw pump

release time:

2021-09-15 10:37

source:

Screw pump is a volume pump with unique structure, mainly composed of drive motor and reducer, connecting shaft and link box, stator and rotor. At working, the rotor is driven by a motor, and the planet rotates in the stator. The elastic liner of the rotor and the stator forms several sealed cavities that are not connected with each other. Due to the rotation of the rotor, the sealing cavity moves in the axial direction from the suction end to the discharge end, and the medium is continuously transmitted from the suction end to the discharge end in the cavity.2. Operation; open the suction and discharge valves before pump start;

1) Start the pump for the first time or use the long-term sealed pump again, inject the input liquid, and turn the pump shaft several times with the help of auxiliary tools, so that the stator will not be damaged. The pump cannot start without liquid, which will damage the stator;

2) Start the motor for a moment, check the rotation direction of the pump, and confirm the same direction as the target of the pump shell;

3) After starting the pump, observe whether the reading of the pressure gauge and the vacuum gauge of the pressure gauge meet the requirements, pay attention to the sound, vibration and other operation conditions of the pump, and immediately stop to check if it is abnormal;

4) During the initial startup, the initial leakage of the packing seal (especially PTFE) should be adjusted evenly during 15 minutes of the initial start process. About 1 / 8 revolutions each time, adjusted to low leakage. If the packing function temperature increases sharply and the leakage amount decreases sharply, the nut should be released immediately and repeat the above process;

5) When the pump is in normal operation, the flow rate is controlled by adjusting the rotation speed;

3. Maintenance and maintenance;

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