Impeller flow guide structure of multi-stage centrifugal pump

Abstract

The utility model provides a multi-stage centrifugal pump impeller flow guide structure, which relates to the technical field of centrifugal pumps, and comprises a multi-stage centrifugal pump assembly and a flow guide assembly, the flow guide assembly is arranged at one end of the multi-stage centrifugal pump assembly, an installation assembly is arranged on the flow guide assembly, and the multi-stage centrifugal pump assembly comprises a multi-stage centrifugal pump. The hydraulic telescopic rod is synchronously controlled to stretch out and draw back and is matched with the rotating seat and the rotating shaft to rotate, so that the opening and closing degree of the guide vanes can be adjusted, and when the liquid flow is large, the opening size of the guide vanes is increased, so that the liquid flow area is increased, more liquid smoothly enters the impeller, and the efficiency is improved. Congestion caused by too narrow flow channels is avoided, turbulent flow and impact of liquid at an inlet are reduced, and energy loss is reduced; on the contrary, when the liquid flow is small, the size of the opening of the guide vane is reduced, the liquid is guided to enter the impeller more intensively, unnecessary diffusion of the liquid in an inlet area is prevented, and the working efficiency of the impeller is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump technical field especially relates to a multistage centrifugal pump impeller flow guide structure. BACKGROUND

[0002] Multistage centrifugal pump plays an indispensable role in many fields because of its characteristics of generating higher pressure and realizing long-distance and high-lift liquid delivery. In the petroleum and chemical industry, it is used to transport special liquids with corrosive, high viscosity or flammable and explosive properties to meet the pressure and flow requirements of complex processes. In the power field, whether it is the supply of boiler feed water in thermal power generation or the delivery of circulating water in hydroelectric power generation, multistage centrifugal pumps ensure the stable operation of power generation equipment. In the metallurgical industry, multistage centrifugal pumps are needed to transport large amounts of ore pulp and cooling water during ore dressing, smelting and metal processing. The impeller flow guide structure, as a key component of the multistage centrifugal pump, plays a decisive role in the flow state of the liquid in the pump.

[0003] The existing centrifugal pump impeller flow guide structure usually adopts a straight blade flow guide device, which is not convenient for effectively guiding liquids with different flow rates and rotational flows, resulting in strong impact between the liquid and the blade at the inlet, generating a large amount of turbulence and vortex, thereby increasing the flow resistance and interfering with the normal rotation of the impeller, causing the problem of reduced work efficiency. SUMMARY

[0004] The utility model discloses a multistage centrifugal pump impeller flow guide structure to solve the problem of low work efficiency caused by the strong impact between the liquid and the blade at the inlet, the generation of a large amount of turbulence and vortex, the increase of flow resistance and the interference with the normal rotation of the impeller.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multistage centrifugal pump impeller flow guide structure, comprising a multistage centrifugal pump assembly and a flow guide assembly, the flow guide assembly is arranged at one end of the multistage centrifugal pump assembly, the flow guide assembly is provided with a mounting assembly, the multistage centrifugal pump assembly comprises a multistage centrifugal pump, a plurality of impellers are installed inside the multistage centrifugal pump, the flow guide assembly comprises a flow guide pipe, an installation ring is installed inside the flow guide pipe, a plurality of rotating shafts are distributed on the side surface of the installation ring, flow guide blades are connected to the outer side of the rotating shafts, a plurality of connecting plates are uniformly distributed on the side surface of the installation ring, a connecting ring is installed at one end of the connecting plate, a hydraulic telescopic rod is installed between the connecting ring and the flow guide blade, rotating seats are connected to both ends of the hydraulic telescopic rod.

[0006] Preferably, the inner wall of the flow guide pipe is provided with a limiting ring connected with the side surface of the mounting ring, the mounting assembly comprises a plurality of rotating shafts distributed on the surface of the flow guide pipe, and the outer side of the rotating shaft is provided with a limiting plate.

[0007] Preferably, the mounting assembly further comprises a clamping ring, and the surface of the flow guide pipe is provided with a clamping groove, and the clamping ring is arranged in the clamping groove.

[0008] Preferably, the side surface of the clamping ring is provided with a limiting disc connected with the limiting plate.

[0009] Preferably, the side surface of the limiting disc is symmetrically provided with a connecting frame, the inner side of the connecting frame is penetrated by a pull rod, and the outer side of the pull rod is provided with a spring.

[0010] Preferably, the side surface of the flow guide pipe is connected with a butt joint pipe, and one end of the spring is movably connected to the inner wall of the butt joint pipe.

[0011] Preferably, the surface of the mounting ring is distributed with a plurality of friction pads, and the limiting plate is connected with the friction pads.

[0012] Preferably, the top of the multistage centrifugal pump is provided with a diffusion section, and the inner side of the diffusion section is distributed with a plurality of turbulence protrusions.

[0013] Preferably, the flow guide vane is arranged on the side of the impeller.

[0014] Preferably, the flow guide pipe is connected with one end of the multistage centrifugal pump.

[0015] Compared with the prior art, the utility model has the advantages and positive effects that,

[0016] 1、in the utility model, the hydraulic telescopic rod is controlled synchronously to be telescopic, and the rotating seat and the rotating shaft are rotated, so that the size of the flow guide vane is adjusted, when the liquid flow is large, the size of the flow guide vane opening is increased, so that the liquid flow area is increased, more liquid is smoothly entered into the impeller, the congestion caused by the too narrow flow channel is avoided, the turbulence and impact of liquid at the inlet are reduced, and the energy loss is reduced, on the contrary, when the liquid flow is small, the size of the flow guide vane opening is reduced, liquid is more concentratedly entered into the impeller, unnecessary diffusion of liquid in the inlet area is prevented, the working efficiency of the impeller is improved, and the energy utilization efficiency of the multistage centrifugal pump assembly is improved.

[0017] 2. The utility model discloses a mounting ring is installed in the flow guide pipe, and the limiting ring is favorable for providing the limiting effect for the mounting ring, then utilizes the pivot and rotates, and then drives the limiting board to rotate, makes the limiting board be connected with the friction pad, is favorable for the limiting of mounting ring, and the mounting ring is conveniently installed and dismantled, and then the maintenance replacement of mounting ring and flow guide vane is facilitated, does not need to use the tool and carry out the tedious operation, reduces manpower and time cost, and then improves the maintenance efficiency, through the clamping ring is clamped in the inside of the card slot, makes the limiting disc be connected with the limiting board, is favorable for providing the limiting effect for the limiting board, and the spring is compressed under the force when the clamping ring is installed and is loosened, and the spring extends and then drives the one end of draw bar to set up in the inner wall of the butt joint pipe, is favorable for providing the limiting effect, guarantees the stability of limiting disc limiting. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model;

[0019] Figure 2 Another angle structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model;

[0020] Figure 3 An installation assembly exploded structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model;

[0021] Figure 4 Another angle installation assembly exploded structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model;

[0022] Figure 5 A flow guide assembly exploded structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model;

[0023] Figure 6 A partial development structure schematic view of the multi-stage centrifugal pump impeller flow guide structure is provided for the utility model.

[0024] Legend: 1, multi-stage centrifugal pump assembly; 101, multi-stage centrifugal pump; 102, impeller; 103, diffusion section; 104, turbulence protrusion; 2, flow guide assembly; 201, flow guide pipe; 202, mounting ring; 203, rotating shaft; 204, flow guide vane; 205, hydraulic telescopic rod; 206, rotating seat; 207, connecting ring; 208, connecting plate; 209, limiting ring; 3, installation assembly; 301, butt joint pipe; 302, limiting disc; 303, card slot; 304, pivot; 305, limiting board; 306, connecting frame; 307, draw bar; 308, spring; 309, clamping ring. DETAILED DESCRIPTION

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example 1: As Figures 1-6 As shown, this utility model provides a technical solution: a multi-stage centrifugal pump impeller guide structure, including a multi-stage centrifugal pump assembly 1 and a guide assembly 2. The guide assembly 2 is disposed at one end of the multi-stage centrifugal pump assembly 1, and an mounting assembly 3 is disposed on the guide assembly 2. The multi-stage centrifugal pump assembly 1 includes a multi-stage centrifugal pump 101, and multiple impellers 102 are installed inside the multi-stage centrifugal pump 101. The guide assembly 2 includes a guide pipe 201, and an mounting ring 202 is installed inside the guide pipe 201. Multiple rotating shafts 203 are distributed on the side of the mounting ring 202. The multistage centrifugal pump 101 is connected to a guide vane 204. Multiple connecting plates 208 are evenly distributed on the side of the mounting ring 202. A connecting ring 207 is installed at one end of the connecting plate 208. A hydraulic telescopic rod 205 is installed between the connecting ring 207 and the guide vane 204. Rotating seats 206 are connected to both ends of the hydraulic telescopic rod 205. A diffuser section 103 is opened at the top of the multistage centrifugal pump 101. Multiple turbulence protrusions 104 are distributed inside the diffuser section 103. The guide vane 204 is located on the side of the impeller 102. The guide pipe 201 is connected to one end of the multistage centrifugal pump 101.

[0028] In the embodiment, the flow guide pipe 201 is connected with one end of the multi-stage centrifugal pump 101, and is retracted and extended through synchronous control of the hydraulic telescopic rod 205, and is rotated through cooperation of the rotating seat 206 and the rotating shaft 203, so that the size of the opening of the flow guide vane 204 is adjusted, when the liquid flow is large, the size of the opening of the flow guide vane 204 is increased, so that the liquid flow area is increased, more liquid is smoothly introduced into the impeller 102, congestion caused by a too narrow flow channel is avoided, liquid turbulence and impact at the inlet are reduced, and energy loss is reduced; on the contrary, when the liquid flow is small, the size of the opening of the flow guide vane 204 is reduced, liquid is guided to more concentratedly enter the impeller 102, unnecessary diffusion of liquid in the inlet area is prevented, the working efficiency of the impeller 102 is improved, the energy utilization efficiency of the multi-stage centrifugal pump assembly 1 is improved, the connecting ring 207 is beneficial to providing mounting for the rotating seat 206 and the hydraulic telescopic rod 205, the connecting plate 208 facilitates connection of the connecting ring 207 with the mounting ring 202, liquid is discharged through the diffusion section 103 after passing through the plurality of impellers 102, a plurality of turbulence protrusions 104 and 105 are installed in the diffusion section 103, liquid parts with different flow rates are mixed with each other, kinetic energy is more efficiently converted into pressure energy, and the overall performance of the multi-stage centrifugal pump assembly 1 is further improved.

[0029] Embodiment 2: as shown in Figures 1-6 The inner wall of the flow guide pipe 201 is provided with a limiting ring 209, the limiting ring 209 is connected with the side surface of the mounting ring 202, the mounting assembly 3 comprises a plurality of rotating shafts 304, the rotating shafts 304 are distributed on the surface of the flow guide pipe 201, the outer side of the rotating shaft 304 is provided with a limiting plate 305, the mounting assembly 3 further comprises a clamping ring 309, the surface of the flow guide pipe 201 is provided with a clamping groove 303, the clamping ring 309 is installed in the inside of the clamping groove 303, the side surface of the clamping ring 309 is provided with a limiting disc 302, the limiting disc 302 is connected with the limiting plate 305, the side surface of the limiting disc 302 is symmetrically provided with a connecting frame 306, the inside of the connecting frame 306 is penetrated by a pull rod 307, the outer side of the pull rod 307 is provided with a spring 308, the side surface of the flow guide pipe 201 is connected with a butt joint pipe 301, one end of the spring 308 is movably connected with the inner wall of the butt joint pipe 301, the surface of the mounting ring 202 is distributed with a plurality of friction pads, the limiting plate 305 is connected with the friction pads.

[0030] In the embodiment, the limiting ring 209 is mounted on the inner wall of the flow guide pipe 201, the mounting ring 202 is mounted inside the flow guide pipe 201, the limiting ring 209 is beneficial to provide the limiting action for the mounting ring 202, then the rotating shaft 304 is rotated, and the limiting plate 305 is driven to rotate, so that the limiting plate 305 is connected with the friction pad, which is beneficial to limit the mounting ring 202, facilitates the mounting and dismounting of the mounting ring 202, and facilitates the maintenance and replacement of the mounting ring 202 and the flow guide vane 204, without using tools to perform complicated operations, thereby reducing the labor and time costs, and improving the maintenance efficiency. The clamping ring 309 is clamped in the clamping groove 303, the limiting disc 302 is connected with the limiting plate 305, which is beneficial to provide the limiting action for the limiting plate 305, the pull rod 307 is pulled to the side, the spring 308 is compressed under stress, the pull rod 307 is released after the clamping ring 309 is mounted, the spring 308 is extended, and one end of the pull rod 307 is arranged on the inner wall of the butt joint pipe 301, which is beneficial to provide the limiting action and ensure the stability of the limiting of the limiting disc 302.

[0031] The working principle of the embodiment is as follows: in use, first, the mounting ring 202 is placed inside the flow guide pipe 201, the limiting ring 209 is beneficial to provide the limiting action for the mounting ring 202, then the rotating shaft 304 is rotated, and the limiting plate 305 is driven to rotate, so that the limiting plate 305 is connected with the friction pad, which is beneficial to limit the mounting ring 202, the clamping ring 309 is clamped in the clamping groove 303, the limiting disc 302 is connected with the limiting plate 305, which is beneficial to provide the limiting action for the limiting plate 305, the pull rod 307 is pulled to the side, the spring 308 is compressed under stress, the pull rod 307 is released after the clamping ring 309 is mounted, the spring 308 is extended, and one end of the pull rod 307 is arranged on the inner wall of the butt joint pipe 301, which is beneficial to provide the limiting action and ensure the stability of the limiting of the limiting disc 302; after the installation is completed, the water inlet pipe is connected with the butt joint pipe 301, the liquid enters the inside of the multi-stage centrifugal pump 101 through the butt joint pipe 301, the synchronous control hydraulic telescopic rod 205 is worked to perform telescopic operation, and the rotating seat 206 and the rotating shaft 203 are rotated, so as to be beneficial to adjust the size of the opening of the flow guide vane 204, when the liquid flow is large, the size of the opening of the flow guide vane 204 is increased, so that the liquid flow area is increased, more liquid smoothly enters the impeller 102, and conversely, when the liquid flow is small, the size of the opening of the flow guide vane 204 is reduced, and the liquid is guided to more concentratedly enter the impeller 102. After the liquid passes through a plurality of impellers 102, the liquid is discharged through the diffusion section 103. A plurality of turbulence protrusions 104 and 105 are mounted in the inside of the diffusion section 103, so that the parts with different flow rates in the liquid are mixed with each other, the kinetic energy is more efficiently converted into pressure energy, and the overall performance of the multi-stage centrifugal pump assembly 1 is further improved.

[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A multi-stage centrifugal pump impeller guide structure, comprising a multi-stage centrifugal pump assembly (1) and a guide assembly (2), characterized in that: The flow guide assembly (2) is arranged at one end of the multistage centrifugal pump assembly (1), the flow guide assembly (2) is provided with a mounting assembly (3), the multistage centrifugal pump assembly (1) comprises a multistage centrifugal pump (101), a plurality of impellers (102) are arranged in the multistage centrifugal pump (101), the flow guide assembly (2) comprises a flow guide pipe (201), the flow guide pipe (201) is internally provided with a mounting ring (202), a plurality of rotating shafts (203) are arranged on the side surface of the mounting ring (202), the rotating shafts (203) are externally connected with flow guide blades (204), a plurality of connecting plates (208) are uniformly arranged on the side surface of the mounting ring (202), one end of the connecting plate (208) is provided with a connecting ring (207), the connecting ring (207) and the flow guide blade (204) are provided with a hydraulic telescopic rod (205), and both ends of the hydraulic telescopic rod (205) are connected with rotating seats (206).

2. The multi-stage centrifugal pump impeller guide vane structure of claim 1, wherein: The inner wall of the flow guide pipe (201) is provided with a limiting ring (209), the limiting ring (209) is connected with the side surface of the mounting ring (202), the mounting assembly (3) comprises a plurality of rotating shafts (304), the rotating shafts (304) are arranged on the surface of the flow guide pipe (201), and the outer side of the rotating shaft (304) is provided with a limiting plate (305).

3. The multi-stage centrifugal pump impeller flow guide structure of claim 1, wherein: The mounting assembly (3) further comprises a clamping ring (309), the surface of the flow guide pipe (201) is provided with a clamping groove (303), and the clamping ring (309) is arranged in the clamping groove (303).

4. The multi-stage centrifugal pump impeller guide structure of claim 3, wherein: The side surface of the clamping ring (309) is provided with a limiting disc (302), and the limiting disc (302) is connected with the limiting plate (305).

5. The multi-stage centrifugal pump impeller guide vane structure of claim 4, wherein: The side surface of the limiting disc (302) is symmetrically provided with a connecting frame (306), the connecting frame (306) is penetrated by a pull rod (307), and the outer side of the pull rod (307) is provided with a spring (308).

6. The multi-stage centrifugal pump impeller guide vane structure of claim 5, wherein: The side surface of the flow guide pipe (201) is connected with a butt joint pipe (301), and one end of the spring (308) is movably connected to the inner wall of the butt joint pipe (301).

7. The multi-stage centrifugal pump impeller guide structure of claim 2, wherein: The surface of the mounting ring (202) is provided with a plurality of friction pads, and the limiting plate (305) is connected with the friction pads.

8. The multi-stage centrifugal pump impeller flow guide structure of claim 1, wherein: The top of the multistage centrifugal pump (101) is provided with a diffusion section (103), and the inner portion of the diffusion section (103) is provided with a plurality of turbulence protrusions (104).

9. The multi-stage centrifugal pump impeller flow guide structure of claim 1, wherein: The flow guide blade (204) is arranged at the side of the impeller (102).

10. The multi-stage centrifugal pump impeller flow guide structure of claim 1, wherein: The flow guide pipe (201) is connected with one end of the multistage centrifugal pump (101).

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