CN211950869U

CN211950869U - Pump body external member and pump

Info

Publication number: CN211950869U
Application number: CN202020451298.9U
Authority: CN
Inventors: 卢才美
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-17
Anticipated expiration: 2030-03-31

Abstract

The utility model provides a pump body external member and pump belongs to the fluid machinery field. The pump solves the problems of large volume and low pressure of other pumps of partial flow pumps. The pump body external member comprises a pump shell outer wall, a pump shell end plate, an impeller in the pump shell, a sealing element on the pump shell outer wall and an interstage sealing element, and is characterized in that an interstage clapboard corresponding to the side face of the impeller is arranged in the middle of the pump shell, one or more fluid outlets are arranged on the interstage clapboard, and the direction of the fluid outlets is axial, so that the radial size can be effectively reduced, and the radial force of the impeller can be effectively reduced. The pump body suite can be assembled into products such as a vertical multistage pump, a deep-well pump and the like, has excellent performance, solves the problem that a 4-inch deep-well pump cannot be developed by high power, can replace 5-inch and 6-inch deep-well pumps with the same power, the same lift and the same flow, and is the only updated product of a low-specific-speed pump.

Description

Pump body external member and pump

Technical Field

The utility model belongs to the fluid machinery field relates to a pump body external member, especially relates to a pump body external member of partial flow pump and centrifugal pump. The utility model discloses still relate to the pump that uses above-mentioned pump body external member.

Background

At present, no patent of a vertical multi-stage partial flow pump exists all over the world, a deep well pump using a partial flow pump impeller is not available, a picture is displayed on a certain plant for a vertical multi-stage partial flow pump product, the product is similar to a horizontal multi-stage partial flow pump, the structure is large, the application range is limited, and mass production may not exist. The horizontal structure can not be imitated and reformed into a deep well pump and a vertical multi-stage pump with small diameter, and the single-stage vertical partial-flow pump has huge volume and cannot be lightened and miniaturized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pump body external member of various pumps which are assembled with other parts of the pump into a small-diameter, light and high-pressure pump body external member aiming at the problems in the prior art; another utility model aims at can utilize this pump body external member of many sets and assemble into vertical multistage pump or deep-well pump with other parts of pump, can replace the product that falls behind at present, enlarge the range of application.

One of the purposes of the utility model can be realized by the following technical scheme: a pump body external member, includes impeller, pump casing outer wall, pump casing end plate, the interior pump casing, the seal of pump casing outer wall, interstage seal, its characterized in that: the middle part of the pump shell is provided with an interstage diaphragm corresponding to the side surface of the impeller, the interstage diaphragm is provided with one or more fluid outlets, and the direction of the fluid outlets is axial, so that the radial size can be effectively reduced, and the radial force of the impeller can be effectively reduced.

In the pump body kit, a sloping plate or a diffusion plate or/and guide vanes or groups of guide vanes integrated with the outer wall of the pump shell are arranged above the fluid outlet so as to gradually increase the pressure.

In the above pump body kit, an annular flow passage is provided below the guide vane.

In the pump body kit, a vortex passage with a constant cross section or gradually enlarged flow area is arranged above the fluid outlet so as to gradually increase the energy of the liquid.

In the pump body suite, the pump shell end plate and the outer wall of the pump shell are integrally formed, and the shape of the pump shell end plate corresponds to the side face of the impeller, so that the working reliability of the pump is improved.

In the pump body suite, the annular volute integrated with the interstage partition plate is arranged below the fluid outlet, and one or more radial outlets communicated with the fluid outlet are arranged on the annular surface of the volute, so that the pump body suite can be favorable for the flow of liquid and can adapt to different working conditions.

In the pump body kit, one or more throat plates are integrally formed between the lower portion of the interstage diaphragm and the outer wall of the pump casing.

In the pump body suite, the guide plates are arranged on two sides of the radial outlet to reduce backflow of liquid and reduce hydraulic loss.

In the pump body suite, the impeller is an open or semi-open type partial flow type or centrifugal impeller with an outlet placement angle of 70-110 degrees, so that the unique characteristics of the impeller are effectively exerted, and flexible configuration according to working conditions is facilitated.

In the pump body suite, the outer circle blades of the impeller are formed into a twisted blade surface, so that the flow direction of liquid can be guided, and the efficiency is improved.

One of the purposes of the utility model can be realized by the following technical scheme: a pump, characterized by: comprising one or more sets of the pump body kit described above.

In the above pump, the pump is used in cooperation with a series motor, a variable frequency motor, a permanent magnet synchronous motor or a high-speed motor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the pump case after the innovation of the utility model is minimized, the weight is light, the purpose of small diameter, light weight and high pressure can be achieved if the rotating speed of the pump is increased, and the pump case can be suitable for certain special occasions if a high-speed motor (exceeding 10000rpm) is adopted.

2. Through the utility model discloses pump body external member after the innovation, the multistage pump of constitution, because small, pressure height, light in weight can develop a lot of application occasions, if spray, spray irrigation, spout medicine etc. the deep-well pump advantage of constitution is more obvious, can assemble into and surpass present QJ type 4 inches deep-well pumpThe product with the maximum power can be developed to the high power smoothly, can replace a deep-well pump with the same power, the same lift and the same flow rate of 5 inches and 6 inches, has the performance of the pump exceeding that of an old product, greatly reduces the weight and height, is convenient to hoist and use, and reduces the use cost and the social cost. Capable of producing deep-well pumps starting from 3 inches at low specific speeds (symbol n)_sRepresentative parameter of high-lift pumps) is the only updated product of pumps.

Drawings

FIG. 1 is a schematic view of a pump body set with an axial fluid outlet;

FIG. 2 is a schematic view of a set of vanes;

FIG. 3 is a schematic view of a pump body assembly having a fluid outlet that is a combination of axial and radial outlets;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

fig. 5 is a schematic view of a twisted blade surface at the outer circle of the impeller.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1, the pump body kit comprises a pump casing outer wall 5, a pump casing end plate 11, an impeller 3 inside the pump casing, a seal 8 of the pump casing outer wall 5 and an interstage seal 2 in a seal seat in an interstage diaphragm 10. When assembling, firstly, two sealing elements 2 are arranged in the sealing seat of the interstage diaphragm 10; the seal 8 is fitted to the outer wall 5 of the pump housing. When the impeller is partially assembled, the impeller 3 is assembled on the hexagonal shaft 1 in combination with other parts of the pump, then the hexagonal shaft is assembled on the outer wall 5 of the pump shell, and the cylindrical surface 12 is used for radial positioning, so that the assembly of one stage is completed, and the assembly of each stage is completed by the same method.

An interstage diaphragm 10 is arranged in the middle of the outer wall 5 of the pump casing, the shape of the interstage diaphragm 10 corresponds to the side surface of the impeller 3, the same gaps are kept at all positions, one or more fluid outlets 6 are arranged on the interstage diaphragm 10, the direction of the fluid outlet 6 is axial, the end plate 11 of the pump casing also corresponds to the other side surface of the impeller 3, the two are inclined at the same angle, the same gaps are kept at all positions, or the gaps are adjusted according to special requirements. A scroll passage 4 may be provided above the interstage diaphragm 10, and the shape thereof is shown by a dotted line.

As shown in fig. 2, the provision of an inclined plate 21 or diffuser plate 9, or guide vanes or groups of

guide vanes

18 and 19 integral with the outer wall 5 of the pump housing, or a combination of both, above the fluid outlet 6 facilitates the diffusion pressurisation of the liquid. An annular flow passage is arranged below the guide vane.

As shown in fig. 3 and 4, in order to facilitate the flow of the liquid and reduce the hydraulic loss, a circular ring-shaped volute 14 integrated with the interstage diaphragms 10 is arranged below the fluid outlet 6, and one or more radial outlets 13 communicated with the fluid outlet 6 are arranged on the circular ring shape of the volute 14; alternatively,

guide plates

15, 16 are provided on both sides of the radial outlet 13 to direct the liquid towards the fluid outlet 6; alternatively, one or more throat plates 17 may be integrally formed between the lower portion of the interstage diaphragm 10 and the outer wall 5 of the pump casing.

As shown in fig. 5, a twisted blade surface 20 is formed at the outer circumferential blade 7 of the partial flow type and centrifugal type impeller 3 to guide the flow direction of the liquid, and less vortex is generated, thereby improving efficiency.

The type of impeller is selected according to the rotation speed, application, characteristics, and the like. According to the requirements of working condition characteristics and the like, the outlet installation angle of the blade is selected to be between 70 and 110 degrees. I.e. between the forward and backward bending of the blade. With some modification of the vanes, the two impellers may be used interchangeably.

The process the utility model discloses a pump body external member after the innovation, but the pump part that combines other parts multistage stack one-tenth vertical multistage pump or deep-well pump of pump can be supporting with normal speed motor, also can use with the supporting inverter motor of intermediate speed (3000 ~ 10000rpm), PMSM, can both reach good performance. For example, the high-speed motor (the rotating speed is more than 10000rpm) such as a matched series motor can meet certain special requirements, and can reach the performance index which cannot be reached by the conventional vertical multi-stage pump and the deep-well pump.

Example two

The pump in this embodiment includes the pump body set in the first embodiment, and the pump body set has one or more sets. In practical use, the pump can be matched with a series motor, a variable frequency motor, a permanent magnet synchronous motor or a high-speed motor for use.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a pump body external member, includes pump case outer wall (5), pump case end plate (11), impeller (3) in the pump case, seal (8), interstage seal (2) of pump case outer wall (5), its characterized in that: an interstage diaphragm (10) corresponding to the side face of the impeller (3) is arranged in the middle of the pump shell, one or more fluid outlets (6) are arranged on the interstage diaphragm (10), and the direction of the fluid outlets (6) is axial.

2. The pump body kit according to claim 1, wherein: an inclined plate (21) or a diffuser plate (9) or/and guide vanes or groups of guide vanes (18, 19) integral with the outer wall (5) of the pump housing are arranged above the fluid outlet (6).

3. The pump body kit according to claim 2, wherein: an annular flow passage is arranged below the guide vane.

4. The pump body kit according to claim 1, wherein: a vortex passage (4) with the uniform cross section or gradually enlarged flow area is arranged above the fluid outlet (6).

5. The pump body kit according to claim 1, wherein: the pump casing end plate (11) and the pump casing outer wall (5) are integrally formed, and the shape of the pump casing end plate corresponds to the side face of the impeller (3).

6. The pump body kit according to claim 1, wherein: an annular volute (14) integrated with the interstage diaphragm (10) is arranged below the fluid outlet (6), and one or more radial outlets (13) communicated with the fluid outlet (6) are arranged on the annular surface of the volute (14).

7. The pump body kit according to claim 1, wherein: one or more throat plates (17) are integrally formed between the lower part of the interstage diaphragm (10) and the outer wall (5) of the pump shell.

8. The pump body kit according to claim 6, wherein: guide plates (15, 16) are provided on both sides of the radial outlet (13).

9. The pump body kit according to claim 1, wherein: the impeller (3) is an open or semi-open type partial flow type or centrifugal impeller with a fluid outlet placement angle of 70-110 degrees, and a section of twisted blade surface (20) is formed at an excircle blade (7) of the impeller (3).

10. A pump, characterized by: a pump body kit comprising one or more sets of any one of claims 1 to 9.