Medium-specific-speed centrifugal pump with double-outlet volute

An outlet-type, specific speed technology, applied in the field of centrifugal pumps, can solve problems such as design optimization of the number of volute outlets

Inactive Publication Date: 2020-10-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, people's research on the volute of centrifugal pumps is mainly focused on the area and shape of the section, the area of ​​the throat, and the angle of the tongue, etc. The number of outlets of the volute has not been changed and the design and optimization have not been made to improve the pump efficiency.

Method used

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  • Medium-specific-speed centrifugal pump with double-outlet volute
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  • Medium-specific-speed centrifugal pump with double-outlet volute

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Embodiment 1

[0090] Optimal design of a centrifugal pump, the rated flow rate of the pump is 285m3 / h, the head is 66m, and the specific speed is 88.7.

[0091] The optimized parameters of the present invention are: the diameter of the inlet at the bottom of the impeller is 1500 mm, the diameter of the outlet at the top of the impeller is 4100 mm, and the outer diameter of the double outlet volute is 4160 mm. The cross-section of the water outlet of the double outlet volute is a circular section with a diameter of 1500mm, which is directly connected to the water outlet pipe. The number of blades of the impeller is 6, and the blades adopt a cylindrical non-equal thickness twisted structure.

Embodiment 2

[0093] The specific application process of the present invention is: the pump body of the centrifugal pump and the water suction pipe 1 are filled with water first, the motor drives the impeller 2 to rotate, the water between the blades in the impeller starts to rotate, and the water is thrown from the center of the impeller 2 to the outer edge of the impeller and is relatively fast. The high pressure is discharged from two water outlets. At the same time, due to the pressure difference, the impeller 2 keeps rotating, and the liquid also continuously enters from the water suction pipe 1 and flows out from the water outlet pipe 4 through the double outlet volute 3 .

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Abstract

The invention discloses a medium-specific-speed centrifugal pump with double-outlet volute. The medium-specific-speed centrifugal pump is characterized in that an impeller is arranged at an annular opening in the inner side of the double-outlet volute, a water suction pipeline is connected to the bottom of the impeller, and water outlet pipelines are connected to two water outlets of the double-outlet volute; blades of the impeller are of a cylinder-like twisted structure, and the front faces and the back faces of the blades are smoothly connected through curved surfaces with different curvatures from top to bottom. For the medium-specific-speed centrifugal pump with the double-outlet volute, two-way water outlet is achieved through the two water outlets, the outflow efficiency of the centrifugal pump is improved, meanwhile, the speed component of water flow in the circumferential direction of the volute is enhanced, the water flow condition at the outlet of the volute is improved, hydraulic losses are reduced, and the medium-specific-speed centrifugal pump has good hydraulic performance and operation efficiency.

Description

technical field [0001] The invention relates to a medium specific speed centrifugal pump with a double-outlet volute, which belongs to the technical field of centrifugal pumps. Background technique [0002] The main flow parts of the centrifugal pump are the impeller and the pressurized water chamber. The pressurized water chamber is also called the volute because of its gradually diffused shape. The volute is a necessary place for the centrifugal pump to discharge fluid and pressurize the fluid, so its hydraulic structure has a crucial impact on the efficiency of the centrifugal pump. [0003] At present, people's research on the volute of centrifugal pumps is mainly focused on the area and shape of the section, the area of ​​the throat, and the placement angle of the tongue. The number of outlets of the volute has not been changed and the design and optimization have not been made to improve the pump efficiency. [0004] Therefore, how to overcome the deficiencies of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D29/24F04D1/00
CPCF04D1/00F04D29/242F04D29/426F04D29/4293
Inventor 阚阚陈会向陈雅楠郑源周大庆戴景许哲
Owner HOHAI UNIV
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