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Low-noise centrifugal pump with staggered non-uniform symmetric impeller/guide vane structure

A non-uniform, low-noise technology, applied in the field of low-noise centrifugal pumps with staggered non-uniform symmetrical impeller/guide vane structure, can solve the problems of strong pump body vibration, influence of pump operation stability, pressure pulsation, etc.

Pending Publication Date: 2021-07-30
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for the conventional evenly distributed vane structure, since the frequency of each vane passing through the guide vane is consistent, the pressure wave is prone to phase superposition effect at the outlet of the impeller, resulting in high-amplitude pressure pulsation, causing strong vibration of the pump body, and even affecting the pump. impact on operational stability

Method used

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  • Low-noise centrifugal pump with staggered non-uniform symmetric impeller/guide vane structure
  • Low-noise centrifugal pump with staggered non-uniform symmetric impeller/guide vane structure
  • Low-noise centrifugal pump with staggered non-uniform symmetric impeller/guide vane structure

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Embodiment Construction

[0018] Such as figure 1 As shown, a rib is arranged in the middle of the impeller. The impeller rib starts from the impeller inlet and ends at the impeller outlet. The thickness of the rib is 1.0B. The impeller rib divides the impeller into two parts, which are respectively placed on both sides of the impeller rib. According to the number of impeller blades is 6, the two parts of the impeller are arranged staggered according to α=30° at the interval of this rib. A guide vane rib with the same thickness as the impeller rib is arranged in the guide vane at the same axial position. The guide vane rib starts from the guide vane inlet and ends at the guide vane outlet. The guide vane is divided into two parts, respectively placed On both sides of the guide vane rib, the number of guide vane blades is 5, and the two parts of the guide vanes are staggered according to β=36°.

[0019] In this design, the blades of the impeller and guide vane are arranged asymmetrically along the circ...

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Abstract

The invention relates to a low-noise centrifugal pump with a staggered non-uniform symmetric impeller / guide vane structure. According to the low-noise centrifugal pump with the staggered non-uniform symmetric impeller / guide vane structure, a conventional uniform and symmetric arrangement mode of impeller vanes is broken through, the arrangement angles between impellers and adjacent vanes of the guide vanes are designed according to the periodic trigonometric function relation, the arrangement angles between the vanes conform to the periodic distribution rule, the superimposed effect of pressure waves generated by dynamic and static interference between fluid at outlets of the impellers and the guide vanes is restrained, and the pressure pulsation amplitude is reduced. Meanwhile, rib plates are arranged between the impellers and the guide vanes, the impellers and the guide vanes are arranged in a staggered mode through the rib plates, the flow of liquid flowing out of impeller runners and guide vane runners at the same time is reduced, the dynamic and static interference effect between the movable vanes and the static vanes of the centrifugal pump is further weakened, the purpose of reducing vibration noise is achieved, and on the premise that the efficiency is not influenced, the operation stability of the centrifugal pump is improved.

Description

technical field [0001] The invention discloses a novel impeller and guide vane design structure with low noise characteristics, in particular a low-noise centrifugal pump with a staggered non-uniform symmetrical impeller / guide vane structure. The design concept and method can be applied to vane pumps Impeller design, spatial guide vane design, radial guide vane design, centrifugal and mixed flow fan design field, axial flow fan design field, and other similar fields. Background technique [0002] Centrifugal pumps are widely used in the industrial field and are important fluid conveying equipment. The guide vane centrifugal pump has good operating characteristics and is the main pump type of marine pumps. The low-noise characteristics of the centrifugal pump will directly affect the operation stability and low-noise characteristics of the equipment system. There will be a typical dynamic and static interference phenomenon between the guide vane and the impeller. The matchin...

Claims

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Application Information

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IPC IPC(8): F04D29/22F04D29/44F04D29/66
CPCF04D29/2272F04D29/445F04D29/669
Inventor 张宁蒋俊贤高波倪丹
Owner JIANGSU UNIV
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