Dual-scroll pump

A double volute and pump body technology, applied in the mechanical field, can solve problems such as damage pressure, bearing wear, and affecting the service life of volute pumps, and achieve the effect of prolonging service life and reducing radial force

Inactive Publication Date: 2007-01-10
SHANGHAI EAST PUMP(GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the asymmetric structure of the spiral extrusion chamber, when the water pump operates away from the design condition, the condition of symmetrical distribution of pressure along the impeller axis is destroyed, thus generating a radial force, which mainly depends on the bearing. This will lead to increased bearing wear and seriously affect the service life of the volute pump

Method used

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  • Dual-scroll pump

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Embodiment Construction

[0008] Such as figure 1 As shown, the double volute pump of the present invention is composed of a pump body 1, and a spiral extruding chamber is arranged in the pump body 1, and the extruding chamber is connected with a spiral flow channel 2. The upper side of the flow channel 2 has a partition tongue 3 protruding into the flow channel, wherein, the middle part of the flow channel 2 is provided with a partition plate 4 along the axial direction of the flow channel, and the partition plate 4 is arranged in a spiral Extending linearly to the extrusion chamber, the extrusion chamber is provided with blades (not shown in the figure), the connection line between the lower end point of the partition plate 4 and the rotation center of the blade 0 and the The included angle α of the line between the tongue 3 and the rotation center 0 of the blade is between 160° and 180°.

[0009] Further, a first cavity 5 is formed between the partition plate 4 and the vane, a second cavity 6 is fo...

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Abstract

The invention is a double-casing volute pump, comprising a pump body, where a spiral extruding chamber is arranged in the pump body and connected with a spiral flow channel, the upper side of the flow channel is provided with an inward-projecting spacing tongue, the middle of the flow channel is provided with a baffle in the axial direction of the flow channel, the baffle extends spirally into the extruding chamber, a vane is arranged in the extruding chamber, the connecting line of the bottom end point of the baffle and the rotating center of the vane makes an included angle of 160-180 deg. with that of the spacing tongue and the rotating center of the vane; a first cavity forms between the baffle and the vanes, a second cavity forms between the vanes and the pump casing, and the two cavities are symmetrical with respect to the rotating center of the vanes. And it makes the pressures on two sides of the vane balanced all the time, able to largely reduce radial force and prolong the service life.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a liquid variable capacity machine, in particular to a pump, in particular to a double-volute pump. Background technique [0002] In the prior art, the volute pump is widely used due to its characteristics of large flow rate and high head. The traditional single volute pump adopts a helical discharge chamber, which is designed according to the design flow rate. When it is working in the theoretical design, the velocity and pressure of the liquid around the impeller are uniform and axisymmetric, so the effect The resultant force on the impeller is zero, theoretically there is no radial force. However, due to the asymmetric structure of the spiral extrusion chamber, when the water pump operates away from the design condition, the condition of symmetrical distribution of pressure along the impeller axis is destroyed, thus generating a radial force, which mainly depends on the bearing. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D1/04
Inventor 吴永旭
Owner SHANGHAI EAST PUMP(GRP) CO LTD
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