Impeller assembly of deep well multi-stage pump

Abstract

The utility model provides an impeller assembly of a deep well multi-stage pump, and belongs to the technical field of water pumps. The multi-stage pump impeller assembly solves the problem that a multi-stage pump impeller assembly in the prior art is prone to being damaged due to too many components. The impeller comprises an end cover, an impeller body and a diffuser, the diffuser is cylindrical, a supporting face is formed in the diffuser and divides the diffuser into a front side cavity and a rear side cavity, a through hole is formed in the center of the supporting face, a hub is formed on one side of the impeller body and penetrates through the through hole, and the impeller body is arranged in the front side cavity. The end cover is connected with the end part of the diffuser on one side of the front side cavity, a plurality of front side guide vanes distributed along the circumference of the inner wall of the front side cavity are formed in the front side cavity, a first flow guide surface is formed on the inner side of each front side guide vane, a slot is formed in the end side of each front side guide vane, a second flow guide surface is formed on each front side guide vane, and a plurality of rear side guide vanes are formed in the rear side cavity. The utility model has the advantages of high and stable structural strength and good diversion effect.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to an impeller assembly for a deep well multi-stage pump. Background Technology

[0002] The impeller assembly is driven to rotate at high speed by a motor. The blades apply centrifugal force or axial thrust to the liquid, converting the mechanical energy of the motor into the kinetic energy and pressure energy of the liquid.

[0003] Chinese patent publication number CN212360291U discloses an impeller assembly for a multi-stage submersible pump, including an impeller housing, an impeller housed inside the impeller housing and sleeved on the pump shaft, a liquid inlet at the lower end of the impeller, a liquid flow channel inside the impeller communicating with the liquid inlet, a guide vane disposed above the impeller and inserted and fixed to the impeller housing, a liquid outlet cavity communicating with the liquid flow channel is formed between the impeller and the impeller housing, and a liquid outlet on the top surface of the impeller housing communicating with the liquid outlet cavity. The impeller housing includes a lower impeller housing, the upper part of which extends inward to form a guide vane seat, an impeller hole is provided at the center of the guide vane seat, the impeller is rotatably disposed in the impeller hole, a guide vane mounting hole is provided on the top surface of the guide vane seat, and the guide vane is inserted into the guide vane mounting hole, the lower part of the inner wall of the lower impeller housing and the impeller form a liquid inlet cavity, a mouth ring is disposed in the liquid inlet cavity through a mouth ring seat, and an upper impeller housing, the top surface of which is provided with a liquid outlet.

[0004] The patent provides an impeller assembly for a multi-stage submersible pump, which employs a multi-component structure. When the multi-component structure rotates at high speed, if a component wears or is misaligned during installation, it can easily cause vibration and affect the stability of the pump. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an impeller assembly for a deep well multistage pump.

[0006] The objective of this utility model can be achieved through the following technical solution: An impeller assembly for a deep well multistage pump includes an end cap, an impeller body, and a diffuser. The diffuser is cylindrical and has a support surface inside. The support surface divides the diffuser into a front cavity and a rear cavity. A through hole is provided at the center of the support surface. A hub is formed on one side of the impeller body. The hub passes through the through hole, and the impeller body is disposed inside the front cavity. The end cap is connected to the diffuser end on one side of the front cavity. A plurality of front guide vanes are formed in the front cavity and distributed circumferentially along the inner wall of the front cavity. The inner side of the front guide vanes forms a first flow guide surface. The end side of the front guide vanes has a slot and forms a second flow guide surface. A plurality of rear guide vanes are formed in the rear cavity and are fixed to the support surface.

[0007] In the impeller assembly of the aforementioned deep well multistage pump, the front end of the rear guide vane is crescent-shaped and the rear end is curved. A reinforcing foot is formed at the rear end of the rear guide vane. The reinforcing foot is fixedly connected to the inner wall of the rear cavity. The reinforcing foot and the tail end of the second guide surface are integrally formed.

[0008] In the impeller assembly of the aforementioned deep well multistage pump, a guide groove is provided on the outer peripheral end face of the diffuser, the guide groove is connected to the end face of the rear cavity, and guide tails are formed at both ends of the guide groove.

[0009] In the impeller assembly of the aforementioned deep well multistage pump, several slots are provided at the connection between the support surface and the inner wall of the diffuser. The slots connect the front cavity and the rear cavity, and the slots are located between each pair of front guide vanes and between the front end and the rear end of the rear guide vane.

[0010] Compared with the prior art, the impeller assembly of the deep well multistage pump provided by this utility model has the following beneficial effects: 1. The reinforcing foot at the rear end of the rear guide vane and the tail end of the second guide surface are integrally formed, reducing the number of independent parts, simplifying the structure and assembly process, and reducing manufacturing and assembly costs; 2. The integrated structure enhances the strength and reliability of the components, avoids problems such as loosening and wear caused by the combination of multiple parts, and extends the service life; 3. The front guide vane is provided with a first guide surface and a second guide surface, and the front end of the rear guide vane is crescent-shaped and the rear end is curved. With the guide groove and guide tail, the fluid flow path is optimized, turbulence and resistance are reduced, and energy conversion efficiency is improved; 4. The slot between the support surface and the inner wall of the diffuser connects the front cavity and the rear cavity and is located in a specific position, making the fluid transition smoother, further reducing flow loss and improving the overall performance of the pump. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the front cavity structure of the diffuser;

[0014] Figure 4 This is a schematic diagram of the rear cavity structure of the diffuser.

[0015] In the figure: 1. End cap; 2. Impeller body; 21. Hub; 3. Diffuser; 31. Support surface; 311. Through hole; 312. Slot; 32. Front cavity; 321. Front guide vane; 322. First guide surface; 323. Second guide surface; 33. Rear cavity; 331. Rear guide vane; 332. Reinforcing foot; 34. Guide groove; 341. Guide tail. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 4 As shown, this embodiment includes an end cap 1, an impeller body 2, and a diffuser 3. The diffuser 3 is cylindrical and has a support surface 31 inside. The support surface 31 divides the diffuser 3 into a front cavity 32 and a rear cavity 33. A through hole 311 is provided in the center of the support surface 31. A hub 21 is formed on one side of the impeller body 2. The hub 21 passes through the through hole 311. The end cap 1 is connected to the end of the diffuser 3 on the front cavity 32 side, and the impeller body 2 is installed inside the front cavity 32.

[0018] like Figures 2 to 4 As shown, a plurality of front guide vanes 321 are formed in the front cavity 32, which are circumferentially distributed along the inner wall of the front cavity 32. The inner side of the front guide vane 321 forms a first guide surface 322. The end side of the front guide vane 321 is provided with a slot 312 and a second guide surface 323. A plurality of rear guide vanes 331 are formed in the rear cavity 33. The rear guide vanes 331 are fixed to the support surface 31. The front end of the rear guide vane 331 is crescent-shaped and the rear end of the rear guide vane 331 is curved. A reinforcing foot 332 is formed at the middle position of the curved rear end of the rear guide vane 331. The reinforcing foot 332 is fixedly connected to the inner wall of the rear cavity 33. The reinforcing foot 332 strengthens the strength of the rear guide vane 331. The reinforcing foot 332 and the tail end of the second guide surface 323 are integrally formed.

[0019] like Figures 2 to 4 As shown, a plurality of guide grooves 34 are provided on the end face of the diffuser 3 along the outer periphery of the diffuser 3. The guide grooves 34 are connected to the end face of the rear cavity 33. Guide tails 341 are formed at both ends of the guide grooves 34. The guide grooves 34 and the guide tails 341 enhance the guiding effect of this embodiment.

[0020] To elaborate further, such as Figures 3 to 4 As shown, a plurality of slots 312 are provided at the connection between the support surface 31 and the inner wall of the diffuser 3. The slots 312 are located between the front guide vanes 321 and between the front end and the rear end of the rear guide vane 331. The slots 312 connect the front cavity 32 and the rear cavity 33, further improving the flow guiding effect of this embodiment.

[0021] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0022] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A deep-well multi-stage pump impeller assembly comprising an end cover (1), an impeller body (2) and a diffuser (3), characterized in that: The diffuser (3) is cylindrical and has a support surface (31) inside. The support surface (31) divides the diffuser (3) into a front cavity (32) and a rear cavity (33). A through hole (311) is provided in the center of the support surface (31). A hub (21) is formed on one side of the impeller body (2). The hub (21) passes through the through hole (311) and the impeller body (2) is located inside the front cavity (32). The end cap (1) is connected to the diffuser on one side of the front cavity (32). The diffuser (3) is connected to the end. A plurality of front guide vanes (321) are formed in the front cavity (32) and distributed circumferentially along the inner wall of the front cavity (32). The inner side of the front guide vane (321) is formed as a first guide surface (322). The end side of the front guide vane (321) is provided with a slot (312) and a second guide surface (323) is formed. A plurality of rear guide vanes (331) are formed in the rear cavity (33). The rear guide vanes (331) are fixed to the support surface (31).

2. A deep-well multi-stage pump impeller assembly according to claim 1, characterized in that: The rear guide vane (331) has a crescent-shaped front end and a curved rear end. A reinforcing foot (332) is formed at the rear end of the rear guide vane (331). The reinforcing foot (332) is fixedly connected to the inner wall of the rear cavity (33). The reinforcing foot (332) and the tail end of the second guide surface (323) are integrally formed.

3. A deep-well multi-stage pump impeller assembly according to claim 1, characterized in that: The diffuser (3) has a flow guide groove (34) on its outer peripheral end face. The flow guide groove (34) is connected to the end face of the rear cavity (33). Flow guide tails (341) are formed at both ends of the flow guide groove (34).

4. A deep-well multi-stage pump impeller assembly according to claim 1, characterized in that: The support surface (31) is provided with a number of slots (312) at the connection between it and the inner wall of the diffuser (3). The slots (312) connect the front cavity (32) and the rear cavity (33). The slots (312) are located between the front guide vanes (321) and between the front end and the rear end of the rear guide vane (331).

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