CN202971308U

CN202971308U - Multistage pump

Info

Publication number: CN202971308U
Application number: CN 201220668850
Authority: CN
Inventors: 沈向普; 荣永辉
Original assignee: GUANGZOU BAIYUN PUMP GROUP Ltd
Current assignee: GUANGZOU BAIYUN PUMP GROUP Ltd
Priority date: 2012-12-06
Filing date: 2012-12-06
Publication date: 2013-06-05
Anticipated expiration: 2022-12-06

Abstract

A multistage pump comprises a longitudinal guide vane composed of a cover plate (1), an intermediate separating plate (2), a forward guide vane (3) and an inverse guide vane (4). The multistage pump is characterized in that the inverse guide vane (4) extends outwards to the inner wall of the middle section of the multistage pump. The intersection angle of the outward extending section of the inverse guide vane and the middle section of the multistage pump is 85 to 95 degrees. The multistage pump can improve the efficiency of a water pump, a casting process is not complex, an original longitudinal guide vane circular space is separated into one part of an inverse guide vane flow channel, liquid flowing out of the forward guide vane does not rotate freely in the circular space any more to enter the inverse guide vane, is controlled and separated by the extending section of the inverse guide vane, cannot flow circularly, and is forced to enter the inverse guide vane flowing channel fast, and therefore hydraulic loss is reduced, and the efficiency of the pump is improved. The multistage pump can be suitable for a vertical type multistage pump and a horizontal type multistage pump at the same time.

Description

A kind of multistage pump

Technical field:

The utility model relates to a kind of multistage pump, especially relates to a kind of multistage pump with inferior flow channel type guide blade.

Background technique:

Existing multistage pump generally is comprised of inlet segment, stage casing, water exit end, impeller, stator etc., and stator divides radially stator and flow channel type guide blade; Due to flow channel type guide blade in more complicated aspect casting technique, therefore most of multistage pump all adopts radially stator.And traditional radially stator is made of guide vane, ring-like space, return guide vane.From guide vane liquid out, do ring rotation after mix in ring-like space, and then enter return guide vane.So just there is a kind of hydraulic loss.

Summary of the invention

Technical problem to be solved in the utility model, just being to provide does not a kind ofly have or the multistage pump of less hydraulic loss.

Solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows:

A kind of multistage pump comprises the radially stator that is made of cover plate 1, intermediate clapboard 2, guide vane 3 and return guide vane 4, it is characterized in that: described return guide vane extends outwardly into the stage casing inwall of multistage pump.

The angle of the stage casing inner circle of the outward extending extension of described return guide vane and multistage pump is the 85-95 degree.

The utility model is simultaneously applicable to vertical and horizontal type multi-stage pump.

Beneficial effect: the efficient casting technique that the utility model can improve water pump again can be too complicated, and make original radial guiding leaf joint type space be cut off a part that becomes the return guide vane runner, the liquid that flows out from guide vane is no longer freely just to enter return guide vane after ring-like Space Rotating, but control and cut off by the extension of return guide vane, can not do annularly flow, be forced to enter rapidly the return guide vane runner, thereby reduced hydraulic loss, improved the efficient of pump.

Description of drawings:

Fig. 1 is traditional radially stator and stage casing schematic diagram;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is inferior flow channel type guide blade schematic diagram of the present utility model;

Fig. 4 is the sectional view of Fig. 3.

In figure: 1 cover plate, 2 intermediate clapboards, 3 guide vanes, 4 return guide vanes; 5 ring-like space, stage casings 6 (enclosure portion in figure).

Embodiment:

As depicted in figs. 1 and 2, for radially stator and the stage casing schematic diagram of existing multistage pump, by the radially stator that cover plate 1, intermediate clapboard 2, guide vane 3, return guide vane 4 consist of, return guide vane does not extend to the inwall in the stage casing 5 of multistage pump, also has ring-like space 6.

Fig. 3 and multistage pump of the present utility model shown in Figure 4, inferior flow channel type guide blade is designed to be comprised of cover plate 1, intermediate clapboard 2, guide vane 3, return guide vane 4, and return guide vane 4 is extended to cylindrical, until contact with the inner circle in the stage casing 5 of multistage pump, there is no to have ring-like space 6.

The angle of return guide vane 4 extensions and multistage pump stage casing inner circle between the 85-95 degree, best one-tenth an angle of 90 degrees.

Claims

1. a multistage pump, comprise the radially stator that is made of cover plate (1), intermediate clapboard (2), guide vane (3) and return guide vane (4), and it is characterized in that: described return guide vane (4) extends outwardly into the stage casing inwall of multistage pump.

2. multistage pump according to claim 1, it is characterized in that: the angle of the stage casing inner circle of the outward extending extension of described return guide vane (4) and multistage pump is the 85-95 degree.