CN215719527U

CN215719527U - Water pump for conveying condensed water

Info

Publication number: CN215719527U
Application number: CN202121320556.0U
Authority: CN
Inventors: 周红兵; 刘列; 王维; 蒋建珍; 韩伟
Original assignee: Jiangsu Zhenhua Haike Equipment Technology Co ltd
Current assignee: Jiangsu Zhenhua Haike Equipment Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-02-01
Anticipated expiration: 2031-06-11

Abstract

The utility model belongs to the technical field of water delivery pumps, and particularly relates to a water pump for delivering condensed water, which comprises a pump body, wherein a cavity is formed in the pump body, a driving shaft is rotationally connected in the cavity, a secondary assembly and a primary impeller are fixedly connected to the driving shaft, the primary impeller is positioned below the secondary assembly, a primary guide vane is arranged on the outer side of the primary impeller, the primary guide vane is fixedly connected in the cavity, a transition flow passage is formed between the primary guide vane and the secondary assembly, a liquid inlet is formed between the primary guide vane and the secondary assembly, and a liquid outlet is formed in the top end of the secondary assembly. According to the utility model, on the basis of the structure of the conventional vertical multi-stage pump, the suction chamber at the inlet of the pump is designed above the first-stage impeller, the first-stage impeller is inverted, the inlet of the first-stage impeller is upward, so that the filling height of the first-stage impeller is increased, and on the basis that the cavitation performance of the first-stage impeller is optimized to the maximum extent, the cavitation resistance of the water pump is further improved through structure optimization.

Description

Water pump for conveying condensed water

Technical Field

The utility model relates to the technical field of water delivery pumps, in particular to a water pump for delivering condensed water.

Background

With the development of the industry, the requirements of each condensate conveying system on the cavitation resistance and the reliability of a condensate conveying pump are higher and higher, and the small-flow condensate pump which is normally used at present is generally of a single-stage centrifugal impeller structure; after the required flow is increased to a certain degree, the cavitation specific revolution is increased, the requirement is difficult to meet only by a centrifugal impeller, and an inducer is generally added at an impeller inlet at the moment.

However, in the actual manufacturing process, the assembly precision requirement of the inducer is high, the manufacturing cost is high, and the matching clearance between the outer edge of the inducer and the pump shell is small, so that the reliability requirement on parts such as a water pump rotor and a bearing is high, and once the inducer and other parts are eccentric, the inducer and other parts are easily damaged, and the maintenance cost is increased.

At the moment, a centrifugal pump with strong anti-cavitation capability and good reliability under the working condition of large flow needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that a condensate water delivery pump in the prior art is poor in anti-cavitation capability and low in reliability under the working condition of large flow, and provides a water pump for delivering condensate water.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a water pump for carrying congeal water, includes the pump body, the inside cavity of having seted up of the pump body, the cavity internal rotation is connected with the drive shaft, fixedly connected with secondary assembly and first impeller in the drive shaft, first impeller is located secondary assembly below, the first impeller outside is equipped with the first stator, first stator fixed connection is inside the cavity, be equipped with transition flow channel between first stator and the secondary assembly, be equipped with the inlet between first stator and the secondary assembly, the secondary assembly top is equipped with the liquid outlet.

Preferably, a suction chamber is arranged between the liquid inlet and the first-stage impeller, and a flow guide body is fixedly connected in the suction chamber.

Preferably, the top middle part of the first-stage guide vane is communicated with the suction chamber, and the side edge of the first-stage guide vane is communicated with the bottom end of the transition flow channel.

Preferably, the secondary assembly comprises a secondary guide vane and a secondary impeller, the secondary impeller is fixedly connected to the driving shaft, the secondary guide vane is sleeved outside the secondary impeller, and the secondary guide vane is fixedly connected to the side wall of the cavity.

Preferably, secondary stator is equipped with a plurality ofly, and is a plurality of secondary stator is from top to bottom even fixed connection on the drive shaft.

Preferably, the lowermost secondary guide vane is communicated with the top end of the transition flow passage through a pipe.

Compared with the prior art, the utility model has the following advantages:

1. on the basis of the structure of a conventional vertical multistage pump, a pump inlet suction chamber is designed above a first-stage impeller, the first-stage impeller is inverted, and the inlet of the first-stage impeller is upward, so that the filling height of the first-stage impeller is increased, and the anti-cavitation capacity of the water pump is further improved through structure optimization on the basis that the cavitation performance of the first-stage impeller is optimized to the maximum extent;

2. the guide body is additionally arranged between the first-stage impellers of the suction chamber, so that the flow state of a medium at the inlet part of the first-stage impeller can be optimized, and the anti-cavitation capacity of the water pump is improved.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a water pump for conveying condensed water according to the present invention.

In the figure: 1. a pump body; 2. a cavity; 3. a drive shaft; 4. a secondary component; 401. a secondary guide vane; 402. a secondary impeller; 5. a first stage impeller; 6. a transition flow channel; 7. a liquid inlet; 8. a liquid outlet; 9. a suction chamber; 10. a flow conductor; 11. first stage guide vanes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, a water pump for carrying water that congeals, including the pump body 1, cavity 2 has been seted up to pump body 1 inside, and the internal rotation of cavity 2 is connected with drive shaft 3, and the outside motor of accessible drives drive shaft 3 and rotates, fixedly connected with secondary assembly 4 and first impeller 5 on the drive shaft 3, and first impeller 5 is located secondary assembly 4 below, and the first impeller 5 outside is equipped with first stator 11, and first stator 11 fixed connection is inside cavity 2.

The secondary assembly 4 is composed of a secondary guide vane 401 and a secondary impeller 402, the secondary impeller 402 is fixedly connected to the driving shaft 3, the secondary guide vane 401 is sleeved outside the secondary impeller 402, the secondary guide vane 401 is fixedly connected to the side wall of the cavity 2, the secondary guide vanes 401 are provided with a plurality of guide vanes, and the plurality of secondary guide vanes 401 are uniformly and fixedly connected to the driving shaft 3 from top to bottom.

The part time is pressurized one time after another as the medium passes through the individual secondary vanes 401 by the secondary impeller 402.

A transition flow channel 6 is arranged between the first-stage guide vane 11 and the secondary assembly 4, the side edge of the first-stage guide vane 11 is communicated with the bottom end of the transition flow channel 6, and the secondary guide vane 401 positioned at the lowest part is communicated with the top end of the transition flow channel 6.

The medium located inside the first stage guide vane 11 will enter the transition flow channel 6 by the rotation of the first stage impeller 5 and the shape of the first stage guide vane 11 and will enter the lowermost secondary guide vane 401 along the transition flow channel 6, and then the medium is constantly moved upwards and pressurized by the secondary impeller 402 in the secondary guide vane 401.

A liquid inlet 7 is arranged between the first-stage guide vane 11 and the secondary assembly 4, a suction chamber 9 is arranged between the liquid inlet 7 and the first-stage impeller 5, the middle of the top end of the first-stage guide vane 11 is communicated with the suction chamber 9, and fluid entering from the liquid inlet 7 can enter the first-stage guide vane 11 through the suction chamber 9.

Fixedly connected with baffle 10 in the suction chamber 9 can realize playing the effect of rectification to the fluid after entering into suction chamber 9 through baffle 10, and then realizes playing the flow state of optimizing first impeller 5 import position medium, promotes the effect of the anti cavitation erosion ability of water pump.

The secondary assembly 4 has a liquid outlet 8 at the top end, and the fluid pressurized by the secondary guide vanes 401 and the secondary impeller 402 will be discharged from the liquid outlet 8.

The working principle is as follows:

fluid enters the suction chamber 9 from the liquid inlet 7, the guide body 10 inside the suction chamber 9 performs a rectifying function on the fluid inside the suction chamber 9, so that a flow state of a medium at the inlet part of the primary impeller 5 is optimized, a cavitation erosion resistance function of the water pump is improved, the rectified fluid enters the primary guide vanes 11, the rotation of the driving shaft 3 is realized through a driving device such as an external motor, the rotation of the driving shaft 3 drives the primary impeller 5 and the secondary impeller 402 to rotate, the fluid entering the primary guide vanes 11 enters the transition flow channel 6 under the action of the rotating primary impeller 5, and then the gradual pressurization is realized through the plurality of secondary impellers 401 and the secondary impellers 402, in the process, because the guide vane inlet suction chamber 9 of the pump is designed above the primary impeller 5 on the basis of the structure of a conventional vertical multistage pump, the primary impeller 5 is inverted, the inlet of the primary impeller 5 faces upwards, so that the structure increases the filling height of the primary impeller 5, the filling height is the height difference between the liquid outlet of the liquid inlet 7 and the liquid outlet of the primary impeller 5, and the anti-cavitation capacity of the water pump is further improved through structure optimization on the basis that the cavitation performance of the primary impeller 5 is optimized to the maximum extent.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a water pump for carrying congeal water, includes the pump body (1), its characterized in that, cavity (2) have been seted up to pump body (1) inside, cavity (2) internal rotation is connected with drive shaft (3), fixedly connected with secondary (4) and first impeller (5) on drive shaft (3), first impeller (5) are located secondary (4) below, first impeller (5) outside is equipped with first stator (11), first stator (11) fixed connection is inside cavity (2), be equipped with transition runner (6) between first stator (11) and secondary (4), be equipped with inlet (7) between first stator (11) and secondary (4), secondary (4) top is equipped with liquid outlet (8).

2. The water pump for conveying condensed water as claimed in claim 1, wherein a suction chamber (9) is arranged between the liquid inlet (7) and the first-stage impeller (5), and a flow guide body (10) is fixedly connected in the suction chamber (9).

3. The water pump for conveying condensed water as claimed in claim 1, wherein the top middle part of the first stage guide vane (11) is communicated with the suction chamber (9), and the side edge of the first stage guide vane (11) is communicated with the bottom end of the transition flow channel (6).

4. A water pump for conveying condensed water according to claim 1, wherein the secondary assembly (4) is composed of a secondary vane (401) and a secondary impeller (402), the secondary impeller (402) is fixedly connected to the drive shaft (3), the secondary vane (401) is sleeved outside the secondary impeller (402), and the secondary vane (401) is fixedly connected to the side wall of the cavity (2).

5. A water pump for conveying condensed water according to claim 4, wherein a plurality of secondary guide vanes (401) are provided, and the plurality of secondary guide vanes (401) are uniformly and fixedly connected to the driving shaft (3) from top to bottom.

6. A water pump for conveying condensed water according to claim 4, wherein the lowest secondary guide vane (401) is communicated with the top end of the transition flow channel (6) at the bottom.