Water pump flow guide body structure assembly

Abstract

The utility model provides a water pump flow guide body structure assembly, and belongs to the technical field of water pump guide vanes. The problem that a water pump impeller in the prior art is prone to being affected by cavitation is solved. The flow guide impeller comprises a plurality of shells and a plurality of flow guide impellers, each flow guide impeller comprises a wheel disc and a plurality of blades, the blades are circumferentially and uniformly distributed along the periphery of the wheel disc, one end of each blade is fixedly connected with the wheel disc, the other end of each blade extends towards the rotating direction of the impeller, and the surface of each blade is of a streamline curved surface structure. One side of each blade extends out of the end face of the wheel disc to form an exposed blade structure, a pressure reduction groove is formed in the end face of each blade, a connecting hole is formed in the wall face of each pressure reduction groove, and the peripheral end and the inner side end of each blade form a guide-in section, a flow guide section and a guide-out section correspondingly. The flow guide impeller is installed in the shell, and the fixing pin is fixedly connected with the connecting hole. The utility model has the advantages of high efficiency, cavitation prevention and stress relief.

Description

Technical Field

[0001] This utility model belongs to the field of water pump guide vane technology, and relates to a water pump guide vane structure component. Background Technology

[0002] When a multistage water pump is working, if the pressure at the inlet is lower than the vaporization pressure corresponding to the current water temperature, the water will begin to vaporize and form bubbles. In the existing technology, the bending radius of the guide vane structure of some multistage water pumps is too small, which increases the flow rate and reduces the pressure, making it easy to cause cavitation.

[0003] Chinese patent publication number CN212155252U discloses an impeller and its vertical multistage pump. The impeller includes a front cover plate, a rear cover plate, and blades disposed between the front cover plate and the rear cover plate. The diameter of the front cover plate is larger than the diameter of the rear cover plate. The axis of the front cover plate and the axis of the rear cover plate are located on the same axis. The outer circumferential cylindrical surface of the blades is located on the same circumferential cylindrical surface as the outer circumferential cylindrical surface of the front cover plate.

[0004] As can be seen from the specification and accompanying drawings provided in the patent, the impeller blade inlet thickness of this structure is not reduced and the inlet edge does not extend to the impeller inlet, making it difficult to reduce the rapid acceleration and pressure drop of the liquid flow, and making it impossible for the liquid flow to receive work in advance to increase the pressure, which easily causes cavitation. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a water pump fluid guide structure component.

[0006] The objective of this utility model can be achieved through the following technical solution: A water pump guide structure component includes a housing and a guide impeller. The number of housings and guide impellers is several. The guide impeller includes a disk and several blades. The blades are evenly distributed circumferentially along the outer periphery of the disk, and one end of the blade is fixedly connected to the disk. The other end of the blade extends in the direction of impeller rotation, and the surface of the blade is constructed as a streamlined curved surface structure. One side of the blade extends out of the disk end face to form an exposed blade structure. A pressure-reducing groove is provided on the end face of the blade, and a connecting hole is provided on the wall of the pressure-reducing groove. The outer peripheral end and the inner end of the blade are respectively formed as an inlet section, a guide section, and an outlet section. The housing has a single-sided open annular structure, and a receiving cavity is formed inside the housing. A fixing pin is fixedly connected to the inner wall of the receiving cavity of the housing. The guide impeller is installed inside the housing, and the fixing pin is fixedly connected to the connecting hole.

[0007] In the above-mentioned water pump fluid guiding structure assembly, a connecting groove is provided on the outer side of the front end of the housing, and a connecting protrusion is formed at the rear end of the housing.

[0008] In the above-mentioned water pump fluid guiding structure assembly, a guide vane bushing and a sealing ring are fixedly connected to one end of the outer side of the housing, and the sealing ring is installed inside the guide vane bushing.

[0009] In the above-mentioned water pump fluid guiding structure assembly, a protective cylinder is fixedly connected to the front side of the housing, and several flow grooves are opened on the side end face of the protective cylinder. An end cap is fixedly connected to the rear side of the housing.

[0010] In the above-mentioned water pump fluid guide structure assembly, stress relief grooves are provided on the outer periphery of the blades.

[0011] Compared with the prior art, the water pump guide structure component provided by this utility model has the following beneficial effects: 1. The pressure relief groove on the blade end face can improve the local pressure distribution, and the guide impeller is installed inside the casing, reducing the risk of cavitation; 2. The streamlined curved surface structure of the blade surface optimizes the fluid flow trajectory, reduces flow resistance and turbulence, and makes the energy conversion of the fluid in the impeller more efficient; 3. The stress relief groove on the outer periphery of the blade alleviates the stress concentration problem during operation, reduces the risk of blade cracks caused by fatigue stress, and extends the service life of the blade and the entire component. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the shell structure;

[0015] Figure 4 This is a schematic diagram of the shell structure from another angle;

[0016] Figure 5 This is a schematic diagram of the guide impeller structure;

[0017] Figure 6 This is a schematic diagram of the guide impeller from another angle.

[0018] In the diagram: 1. Shell; 11. Receiving cavity; 12. Fixing pin; 13. Connecting groove; 14. Connecting protrusion; 2. Guide impeller; 21. Blade; 22. Pressure reducing groove; 23. Connecting hole; 24. Inlet section; 25. Guide section; 26. Outlet section; 27. Stress relief groove; 3. Guide vane bushing; 4. Sealing ring; 5. Protective cylinder; 51. Flow channel; 6. End cap. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 6 As shown, this embodiment includes a housing 1 and a guide impeller 2. There are three housings 1 and three guide impellers 2, and each housing 1 and guide impeller 2 is set as a group. The guide impeller 2 is made of engineering plastic and has an integral molding structure. The guide impeller 2 includes a disc and several blades 21. The blades 21 are evenly distributed circumferentially along the outer periphery of the disc and one end of the blade 21 is fixedly connected to the disc. The other end of the blade 21 extends in the direction of impeller rotation and the surface of the blade 21 is a streamlined curved surface structure. One side of the blade 21 extends out of the disc end face to form an exposed blade 21 structure. A pressure reducing groove 22 is opened on the end face of the blade 21, and a connecting hole 23 is opened on the wall of the pressure reducing groove 22. The outer peripheral end and the inner end of the blade 21 are respectively formed as an inlet section 24, a guide section 25 and an outlet section 26. The inlet section 24 has a curved surface tilt angle adapted to the fluid inlet direction. The curvature of the guide section 25 guides the fluid to accelerate smoothly. The transition shape of the outlet section 26 causes the fluid to leave the blade 21 at a preset angle.

[0021] like Figures 1 to 6 As shown, the housing 1 has a ring structure with a single-sided opening and a receiving cavity 11 is formed inside the housing 1. A fixing pin 12 is fixedly connected to the inner wall of the receiving cavity 11 of the housing 1. The guide impeller 2 is installed inside the housing 1 and the fixing pin 12 is fixedly connected to the connecting hole 23. A connecting groove 13 is opened on the outer side of the front end of each housing 1, and a connecting protrusion 14 is formed at the rear end of each housing 1. When installing in this embodiment, the front housing 1 is fixedly connected to the connecting groove 13 of the rear housing 1 through the connecting protrusion 14. The front side of the frontmost housing 1 is fixedly connected to the protective cylinder 5 through the connecting groove 13, and the rear side of the rearmost housing 1 is fixedly connected to the end cap 6 through the connecting protrusion 14.

[0022] To elaborate further, such as Figures 1 to 6 As shown, a guide vane bushing 3 and a sealing ring 4 are fixedly connected to one end of the outer side of the housing 1. The sealing ring 4 is installed inside the guide vane bushing 3. The guide vane bushing 3 is installed on the outside of the housing 1 to reduce the direct scouring and wear of the housing 1 by the high-speed flowing fluid or the guide impeller 2 during operation, thereby extending the service life of the housing 1. The sealing ring 4 is elastic and, after being installed inside the guide vane bushing 3, can fit tightly against the surface of the relevant components, effectively preventing fluid leakage from the gap between the housing 1 and the guide impeller 2.

[0023] To elaborate further, such as Figures 1 to 4 As shown, several flow channels 51 are provided on the side end face of the protective cylinder 5.

[0024] To elaborate further, such as Figure 6 As shown, a stress relief groove 27 is provided on the outer periphery of the rear side of the blade 21 to alleviate the stress concentration problem during operation and reduce the risk of the blade 21 cracking due to fatigue stress.

[0025] 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.

[0026] 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 water pump guide structure assembly, comprising a housing (1) and a guide impeller (2), wherein the number of the housing (1) and the guide impeller (2) is plurality of, characterized in that: The guide impeller (2) includes a disk and several blades (21). The blades (21) are evenly distributed circumferentially along the outer periphery of the disk, and one end of the blades (21) is fixedly connected to the disk. The other end of the blades (21) extends in the direction of impeller rotation, and the surface of the blades (21) is a streamlined curved surface structure. One side of the blades (21) extends out of the end face of the disk to form an exposed blade (21) structure. A pressure-reducing groove (22) is provided on the end face of the blades (21). The wall of the pressure-reducing groove (22) is... A connecting hole (23) is provided on the surface. The outer peripheral end and inner side end of the blade (21) are respectively formed as an inlet section (24), a guide section (25) and an outlet section (26). The housing (1) has a ring structure with one side opening and a receiving cavity (11) is formed inside the housing (1). A fixing pin (12) is fixedly connected to the inner wall of the receiving cavity (11) of the housing (1). The guide impeller (2) is installed inside the housing (1) and the fixing pin (12) is fixedly connected to the connecting hole (23).

2. The water pump fluid guiding structure assembly according to claim 1, characterized in that: A connecting groove (13) is provided on the outer side of the front end of the housing (1), and a connecting protrusion (14) is formed at the rear end of the housing (1).

3. The water pump fluid guiding structure assembly according to claim 1, characterized in that: The outer end of the housing (1) is fixedly connected to a guide vane bushing (3) and a sealing ring (4), and the sealing ring (4) is installed inside the guide vane bushing (3).

4. The water pump fluid guiding structure assembly according to claim 1, characterized in that: A protective cylinder (5) is fixedly connected to the front side of the housing (1), and several flow channels (51) are opened on the side end face of the protective cylinder (5). An end cap (6) is fixedly connected to the rear side of the housing (1).

5. A water pump fluid guiding structure assembly according to claim 1, characterized in that: The blade (21) has a stress relief groove (27) on its outer periphery.

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