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Centrifugal pump with stepped balance drum

A technology of balancing drums and centrifugal pumps, which is applied to the components, pumps, and pump components of pumping devices for elastic fluids, and can solve the problems of affecting pump performance, worsening balance effect, and large leakage.

Pending Publication Date: 2020-06-26
SHANDONG ANLITAI EXPLOSION PROOF ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common problems of the balance drum are 1. The gap between the balance drum and the pump body leads to leakage greater than the design expectation, which affects the performance of the pump
2. The outer ring of the balance drum wears too quickly due to the erosion of the leaking medium between the gaps. As a result, the leakage will increase due to the increase in the gap in the short term and affect the performance of the pump. In the long term, the balance effect will deteriorate and the pump will be damaged.

Method used

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  • Centrifugal pump with stepped balance drum

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Embodiment Construction

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] As shown in Figure 1, the stepped balance drum 5 is installed on the rotor shaft 7 through key fixing and shaft shoulder positioning, and the lower surface is supported by the last stage impeller 3; the balance sleeve 6 is installed outside the stepped balance drum 5 to cooperate with it. A gap is formed.

[0013] The stepped balance drum 6 of the present invention is stepped, and cooperates with the balance sleeve 6 to form a five-stage stepped gap. Du...

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Abstract

The invention discloses a centrifugal pump with a stepped balance drum. According to the centrifugal pump, the stepped balance drum is adopted and matched with the corresponding stepped balance sleeveto form the stepped gap, on the basis that the machining difficulty and precision are not increased, gap leakage is reduced, and erosive wear of the outer surface of the balance drum is relieved.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with a stepped balance drum. Background technique [0002] When the centrifugal pump is in operation, the axial force acts on the rotor. Changing the force will pull the rotor to move axially. If the axial force is not eliminated or balanced, this force will pull the rotor to move axially and contact the fixed parts, causing damage to the parts. Even can't work. Therefore, we must try to eliminate or balance the axial force to facilitate the normal operation of the pump. A common balancing method at present is to use a balance drum to balance. Usually, the balance drum is a cylinder, which is installed behind the final stage impeller and rotates with the rotor. The outer surface of the balance drum forms a radial gap with the pump body. In front of the balance drum is the rear pump chamber of the final stage impeller, and behind it is a balance cham...

Claims

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Application Information

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IPC IPC(8): F04D1/06F04D29/046F04D29/66
CPCF04D1/06F04D29/046F04D29/669
Inventor 方慧康陆伟刚曹卫东张留郭倩沈加斌聂爱君董国庆
Owner SHANDONG ANLITAI EXPLOSION PROOF ELECTRICAL