Novel vertical multistage pump
A multi-stage pump, vertical technology, applied in the direction of non-variable pumps, non-volume pumps, pumps, etc., can solve the problems of unfavorable pump normal operation, large load pressure, high working pressure, etc., to improve the reliability of use Improvement of performance and service life, improvement of pump efficiency, and reduction of axial force
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[0019] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0020] Such as figure 1 and figure 2 As shown, the novel vertical multistage pump of this embodiment includes a pump housing 1, a pump shaft 9 is installed in the pump housing 1, a plurality of impellers 8 are installed on the pump shaft 9, and the inlet pressure of each impeller 8 is Less than the outlet pressure, a semi-packaged mechanical seal is installed on the pump shaft 9 at the top of the impeller 8. The structure of the semi-packaged mechanical seal is: including a mechanical seal shaft sleeve 11, which is provided with a card slot. The inside of the card slot is inlaid with the moving ring 5 through the anti-rotation pin 15; the mechanical seal shaft sleeve 11 is covered with a static ring seat 17 on the outer circumferential surface above the moving ring 5, and the bottom of the static ring seat 17 has a groove, and the groove...
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