In depth and accurate diagnosis of faults in vertical Multistage semi submersible long shaft deep well turbine pumps...

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Correctly mastering the radial clearance adjustment of the semi submersible vertical multi-stage long shaft deep well turbine pump can extend the service life of the semi submersible vertical multi-stage long shaft deep well turbine pump, improve the working efficiency of the semi submersible vertical multi-stage long shaft deep well turbine pump, and reduce economic losses. After the pump body is installed, the end caps and tiles at both ends can be installed. Adjust the concentricity of the rotor and stator (lift the shaft). The concentricity requirements for the rotor and stator are: half lift equal to half or slightly less than the total lift (considering the rotor's static winding), equal clearance on both sides of the tile mouth, and uniform four corners. Measurement of shaft lifting for semi submersible vertical multi-stage long shaft deep well turbine pump: Before installing the bearing shell, install one dial gauge on each end bearing frame. The center line of the measuring rod of the gauge should be perpendicular to the shaft center line and in contact with the shaft neck. Use a pry bar to lift the shaft smoothly at both ends of the shaft. The difference in readings of the dial gauge when it is in the up and down positions is the total lifting amount of the rotor. Lift up the rotor and place it into the lower tile. At this point, the reading on the dial gauge should be half of the rotor lift and half of the total lift. Otherwise, adjustments need to be made. If there is an adjusting bolt under the bearing frame during adjustment, only loosen or tighten the bolt. If there is no adjusting bolt, the thickness of the gasket under the bearing shell can be adjusted. For the concentricity between the rotor and the stator on both sides, it is generally determined by whether the clearance between the two sides of the bearing is uniform. After placing the lower bearing, use a feeler gauge to measure the clearance between the four bearing holes of the bearing, adjust it evenly, and the clearance on one side of the bearing hole should be half of the clearance at the top of the bearing....

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