CN220204201U

CN220204201U - Multistage centrifugal water pump

Info

Publication number: CN220204201U
Application number: CN202321619668.5U
Authority: CN
Inventors: 赵福增
Original assignee: Taizhou Ouheng Electromechanical Co ltd
Current assignee: Taizhou Ouheng Electromechanical Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-12-19
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a multistage centrifugal water pump, comprising: outer pump box, driving motor and a plurality of centrifugal pumping subassembly, the one end fixedly connected with of outer pump box goes out liquid and leads to the lid, driving motor fixed mounting is in one side of going out liquid and leading to lid and the output is equipped with the spindle rod that runs through to outer pump box inboard, centrifugal pumping subassembly includes interior pump box, water conservancy diversion end cover and rotates the centrifugal impeller who installs in interior pump box inboard, the periphery of water conservancy diversion end cover is equipped with a plurality of connection lug with interior pump box inboard fixed connection, the periphery of water conservancy diversion end cover and the inboard of interior pump box are equipped with the clearance that uses to derive liquid. According to the centrifugal impeller, the novel multistage centrifugal structure is arranged, the inner pump box and the flow guide end cover freely rotate in the centrifugal rotational flow process of the centrifugal impeller, and the flow guide end cover reversely and freely rotates under the scouring action of water liquid, so that the relative movement rate of the centrifugal impeller and the inner pump box is improved, the water liquid has larger centrifugal acting force, high negative pressure is generated, and more liquid flow is introduced to improve the flow.

Description

Multistage centrifugal water pump

Technical Field

The utility model relates to the technical field of water pumps, in particular to a multistage centrifugal water pump.

Background

Centrifugal pumps for delivering fluids, such as liquids like water, are used in many different industries. Examples are the oil and gas industry, the power generation industry, the chemical industry, the water industry or the pulp and paper industry. For many applications, centrifugal pumps are configured as multi-stage pumps having multiple impellers, i.e., at least a first stage impeller and a last stage impeller, and optionally one or more intermediate stage impellers. All impellers are arranged one after the other on a shaft arranged for rotating the impellers.

The existing centrifugal water pump mainly adopts a plurality of pump boxes and an impeller structure of internal rotary motion to carry out multistage conveying of water liquid, in the conveying process, because the rotating speeds of the plurality of impellers are the same, the kinetic energy of the water liquid in the multistage conveying is the same, the flow is still lower, in addition, the water liquid needs to be communicated through a long communicating pipe when entering the inside of a next-stage pump box from a previous-stage pump box, two ends of the long communicating pipe are respectively connected with the tangential directions of the two pump boxes, the water liquid consumes a large amount of kinetic energy when passing through the upper part and entering the inside of the next-stage pump box, and the part of energy and the friction of the communicating pipe can be converted into heat energy, so that the efficiency is reduced. In view of the above, the present utility model has been made in view of the above problems, and it is an object of the present utility model to provide a multistage centrifugal water pump that solves the problems and improves the practical value by the above technique.

Disclosure of Invention

The present utility model aims to solve one of the technical problems existing in the prior art or related technologies.

The technical scheme adopted by the utility model is as follows: a multi-stage centrifugal water pump, comprising: the centrifugal pump comprises an outer pump box, a driving motor and a plurality of centrifugal pump components, wherein one end of the outer pump box is fixedly connected with a liquid outlet guide cover, one side of the liquid outlet guide cover is fixedly installed by the driving motor, an output end of the driving motor is provided with a spindle rod penetrating through the inner side of the outer pump box, the centrifugal pump components comprise an inner pump box, a flow guide end cover and a centrifugal impeller rotatably installed on the inner side of the inner pump box, a plurality of connecting convex blocks fixedly connected with the inner side of the inner pump box are arranged on the periphery of the flow guide end cover, a gap for guiding liquid is reserved between the periphery of the flow guide end cover and the inner side of the inner pump box, the centrifugal impeller is fixedly sleeved on the surface of the spindle rod, a first liquid inlet is formed in the surface of the inner pump box, and a plurality of swirl vanes oppositely arranged on the surface of the flow guide end cover in a rotating mode with the centrifugal impeller.

The present utility model may be further configured in a preferred example to: the surface of the liquid outlet guide cover is provided with a liquid outlet port which is the same as the rotation direction of the centrifugal impeller and is tangentially arranged on the surface of the liquid outlet guide cover, and one end of the outer pump box is provided with a liquid inlet port positioned on the axis of the main shaft rod.

The present utility model may be further configured in a preferred example to: the centrifugal pumping components are arranged on the inner sides of the outer pump boxes in a number of ways and in parallel, the inner surfaces and the outer surfaces of the inner pump boxes are smooth structures, and the peripheries of the inner pump boxes are in sliding butt with the inner sides of the outer pump boxes.

The present utility model may be further configured in a preferred example to: the centrifugal impeller is positioned on the same circumference with the center of the inner pump box and the guide end cover, and comprises an impeller disc, an impeller cover and a plurality of centrifugal vanes fixed on the inner sides of the impeller disc and the impeller cover, and one side of the impeller cover is provided with a second liquid inlet sleeved on the inner side of the first liquid inlet.

The present utility model may be further configured in a preferred example to: the diameter of the impeller disc is smaller than the diameter of the inner cavity of the inner pump box, and the centrifugal impeller is not contacted with the inner wall of the inner pump box.

The present utility model may be further configured in a preferred example to: the centrifugal blade and the rotational flow blade are of arc structures, and the rotational directions of the centrifugal blade and the rotational flow blade are opposite.

The present utility model may be further configured in a preferred example to: the inner side of the diversion end cover is provided with a bearing sleeved on the surface of the main shaft rod, and the first liquid inlet hole and the main shaft rod are concentrically arranged.

The beneficial effects obtained by the utility model are as follows:

according to the utility model, a novel multistage centrifugal structure is arranged, water is centrifuged through a plurality of centrifugal impellers which rotate after entering an outer pump box, and kinetic energy compensation is carried out step by step through each centrifugal pumping assembly, during centrifugal rotational flow of the centrifugal impellers, the inner pump box and the flow guide end cover freely rotate, and the flow guide end cover is reversely and freely rotated under the scouring action of the water, so that the relative movement rate of the centrifugal impellers and the inner pump box is improved, the water has larger centrifugal acting force, high negative pressure is generated, and more liquid flows are introduced to improve the flow; in addition, the multistage centrifugal pumping components are arranged in parallel to form a continuous centrifugal structure, so that the movement stroke of water and liquid is reduced, the energy consumption is reduced, and the efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic view of an exploded view of an outer pumping cassette according to one embodiment of the present utility model;

FIG. 3 is an exploded view of a centrifugal pumping assembly according to one embodiment of the present utility model;

fig. 4 is an exploded view of a centrifugal impeller according to an embodiment of the present utility model.

Reference numerals:

100. an outer pump box; 110. a liquid outlet guide cover; 120. a liquid inlet port;

200. a driving motor; 210. a main shaft lever;

300. a centrifugal pumping assembly; 310. an inner pump box; 320. a centrifugal impeller; 330. a diversion end cover; 311. a first liquid inlet hole; 321. an impeller disc; 322. an impeller cover; 323. a centrifugal leaf; 324. a second liquid inlet hole; 331. swirl vanes; 332. and connecting the convex blocks.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

A multistage centrifugal water pump according to some embodiments of the present utility model is described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present utility model provides a multistage centrifugal water pump, comprising: the centrifugal pumping assembly 300 comprises an inner pump box 310, a flow guide end cover 330 and a centrifugal impeller 320 rotatably arranged on the inner side of the inner pump box 310, a plurality of connecting lugs 332 fixedly connected with the inner side of the inner pump box 310 are arranged on the periphery of the flow guide end cover 330, a gap for guiding out liquid is arranged on the periphery of the flow guide end cover 330 and the inner side of the inner pump box 310, the centrifugal impeller 320 is fixedly sleeved on the surface of the main shaft 210, a first liquid inlet 311 is formed in the surface of the inner pump box 310, and a plurality of swirl vanes 331 which are oppositely arranged with the centrifugal impeller 320 are rotatably arranged on the surface of the flow guide end cover 330.

In this embodiment, the surface of the liquid guiding cover 110 is provided with a liquid outlet port which is in the same rotation direction as the centrifugal impeller 320 and is tangentially arranged on the surface of the liquid guiding cover 110, and one end of the outer pump casing 100 is provided with a liquid inlet port 120 on the axis of the main shaft 210.

In this embodiment, the centrifugal pumping assemblies 300 are several in number and are sequentially arranged in parallel to each other inside the outer pump case 100, the inner and outer surfaces of the inner pump case 310 are smooth, and the outer periphery of the inner pump case 310 is slidably abutted against the inside of the outer pump case 100.

Specifically, the multistage centrifugal pumping assemblies 300 are arranged in parallel to form a continuous centrifugal structure, so that the water movement stroke is reduced, and the energy consumption is reduced.

In this embodiment, the centrifugal impeller 320, the inner pump box 310 and the center of the diversion end cover 330 are located on the same circle, the centrifugal impeller 320 includes an impeller plate 321, an impeller cover 322, and a plurality of centrifugal vanes 323 fixed on the inner sides of the impeller plate 321 and the impeller cover 322, and one side of the impeller cover 322 is provided with a second liquid inlet 324 sleeved on the inner side of the first liquid inlet 311.

Further, the impeller plate 321 has a diameter smaller than the diameter of the inner cavity of the inner pump casing 310, and the centrifugal impeller 320 does not come into contact with the inner wall of the inner pump casing 310.

Further, the centrifugal blade 323 and the swirl blade 331 are both in arc structures, and the rotation directions of the centrifugal blade 323 and the swirl blade 331 are opposite.

Specifically, during the centrifugal rotational flow process of the centrifugal impeller 320, the inner pump box 310 and the guide end cover 330 freely rotate, and the guide end cover 330 is reversely and freely rotated under the scouring action of the water liquid, so that the relative movement rate of the centrifugal impeller 320 and the inner pump box 310 is improved, the water liquid has larger centrifugal acting force, and the escape efficiency of the water liquid from the edge of the guide end cover 330 is higher.

In this embodiment, a bearing sleeved on the surface of the spindle rod 210 is disposed on the inner side of the diversion end cap 330, and the first liquid inlet 311 is concentrically disposed with the spindle rod 210.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A multi-stage centrifugal water pump, comprising: outer pump box (100), driving motor (200) and a plurality of centrifugal pumping assembly (300), the one end fixedly connected with of outer pump box (100) goes out liquid guide cap (110), driving motor (200) fixed mounting is in one side of going out liquid guide cap (110) and the output is equipped with main shaft pole (210) that runs through to outer pump box (100) inboard, centrifugal pumping assembly (300) include interior pump box (310), water conservancy diversion end cover (330) and rotate install in interior pump box (310) inboard centrifugal impeller (320), the periphery of water conservancy diversion end cover (330) is equipped with a plurality of connection lug (332) with interior pump box (310) inboard fixed connection, the periphery of water conservancy diversion end cover (330) is equipped with the clearance of using the derivation liquid with the inboard of interior pump box (310), centrifugal impeller (320) are fixed to be cup jointed in the surface of main shaft pole (210), the surface rotation of interior pump box (310) is equipped with first feed liquor hole (311), the surface rotation of water conservancy diversion end cover (330) installs a plurality of whirl leaves (331) with centrifugal impeller (320) the opposite direction of rotation.

2. The multistage centrifugal water pump according to claim 1, wherein the surface of the liquid outlet guide cover (110) is provided with a liquid outlet port which is arranged on the surface of the liquid outlet guide cover (110) in a tangential manner and has the same rotation direction as the centrifugal impeller (320), and one end of the outer pump box (100) is provided with a liquid inlet port (120) positioned on the axis of the main shaft rod (210).

3. The multistage centrifugal water pump according to claim 1, wherein the centrifugal pumping assemblies (300) are arranged on the inner side of the outer pump box (100) in a number of sequentially parallel to each other, the inner and outer surfaces of the inner pump box (310) are smooth and smooth, and the outer periphery of the inner pump box (310) is in sliding contact with the inner side of the outer pump box (100).

4. The multistage centrifugal water pump according to claim 1, wherein the centrifugal impeller (320) and the centers of the inner pump box (310) and the diversion end cover (330) are located on the same circumference, the centrifugal impeller (320) comprises an impeller disc (321), an impeller cover (322) and a plurality of centrifugal vanes (323) fixed on the inner sides of the impeller disc (321) and the impeller cover (322), and a second liquid inlet (324) sleeved on the inner side of the first liquid inlet (311) is arranged on one side of the impeller cover (322).

5. The multistage centrifugal water pump according to claim 4, wherein the impeller plate (321) has a diameter smaller than the inner cavity diameter of the inner pump casing (310), and the centrifugal impeller (320) is not in contact with the inner wall of the inner pump casing (310).

6. The multistage centrifugal water pump according to claim 4, wherein the centrifugal blades (323) and the swirl blades (331) are each of an arc structure, and the centrifugal blades (323) and the swirl blades (331) are opposite in rotation direction.

7. The multistage centrifugal water pump according to claim 1, wherein a bearing sleeved on the surface of the main shaft (210) is arranged on the inner side of the diversion end cover (330), and the first liquid inlet hole (311) is concentrically arranged with the main shaft (210).