Impeller assembly, rotor-impeller mechanism and electronic water pump using the same

Abstract

The utility model discloses a kind of impeller assembly, rotor-impeller mechanism and electronic water pump applied thereto, it is related to electronic water pump and its component technical field, it includes impeller component and thrust washer;Impeller component includes the mounting section and impeller body section configured sequentially along axial direction, and mounting section and impeller body section are integrally formed structure;The mounting section of impeller component is configured with washer mounting seat;Thrust washer is installed in the washer mounting seat of impeller component in the way of buckling.The utility model mainly solves how to provide compact structure, the rotor-impeller mechanism of simple assembly for electronic water pump problem;Only through injection molding process is obtained entire impeller component, only need to buckle thrust washer to the washer mounting seat of impeller component, the assembly of thrust washer can be completed, with compact structure, the characteristics of simple assembly, simplify the assembly process of electronic water pump, improve the assembly efficiency of electronic water pump.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic water pumps and their components, specifically an impeller assembly, a rotor-impeller mechanism, and an electronic water pump using the same. Background Technology

[0002] Electric water pumps have high output efficiency and can achieve precise flow control. Therefore, they are widely used in automobiles, home appliances and industrial equipment. For example, new energy vehicles are usually equipped with two or more electric water pumps as the power source for the entire cooling system.

[0003] Impeller and rotor assembly are core components of electric water pumps. The impeller and rotor assembly are usually rigidly connected by a shaft. When the electric water pump is running, various factors can cause the rotor assembly to move axially to a certain extent. For example, when the electric water pump is running under rated conditions, its impeller is affected by water force and will generate a force opposite to the direction of the incoming water flow. This force will then pull the rotor assembly through the shaft, causing the rotor assembly to move closer to the impeller.

[0004] To prevent excessive displacement of the impeller-rotor assembly and to protect other components of the electric water pump, thrust washers are usually installed at the rotor assembly or the pump chamber.

[0005] The Chinese utility model patent announcement text with announcement number CN222162941U and titled "Integrated Rotor Assembly and Electronic Water Pump Using the Same" describes an integrated rotor assembly in which a gasket 5 is embedded in the end face of the clearance section 112 of the inner hole 11 of the rotor support 1, so that the integrated rotor assembly integrates the gasket 5, eliminating the need to set a thrust washer on the bearing seat of the electronic water pump.

[0006] In the manufacturing process of the aforementioned integrated rotor assembly, the shaft core 2, magnetic ring 3, impeller 4, and gasket 5 are pre-made. The shaft core 2, magnetic ring 3, and gasket 5 are then placed into the mold of the rotor support 1. After injecting plastic into the mold, features such as the body of the rotor support 1, the inner hole 11, and the impeller mounting part 13 are formed. Features such as the first fixing rib 1111, the second fixing rib 1121, and the magnetic ring mounting groove 12 are also formed. After demolding, the rotor support 1, shaft core 2, magnetic ring 3, and gasket 5 are integrated and relatively fixed. Finally, the blades 41 of the impeller 4 are fixed to the impeller mounting part 13 of the rotor support 1 by one of the following methods: ultrasonic welding, interference fit, screw locking, and snap-fit ​​fixing. In this embodiment, the impeller 4 is fixed to the impeller mounting part 13 of the rotor support 1 by ultrasonic welding, so that the impeller 4 and the rotor support 1 are integrated and not easy to fall off.

[0007] That is, the aforementioned integrated rotor assembly requires a plastic coating process to fix the gasket 5 to the rotor bracket 1, and an ultrasonic welding process to fix the impeller 4 to the rotor bracket 1. The manufacturing and assembly process involves many steps and is quite complicated, resulting in low production efficiency of the rotor assembly and the electric water pump.

[0008] In conclusion, how to provide a compact and easy-to-assemble rotor-impeller mechanism for electronic water pumps has become one of the urgent problems to be solved. Utility Model Content

[0009] The purpose of this utility model is to provide an impeller assembly, a rotor-impeller mechanism, and an electronic water pump using the same, which has the characteristics of compact structure and simple assembly.

[0010] To achieve the above objectives, this utility model provides the following technical solution: an impeller assembly, comprising an impeller component and a thrust washer; the impeller component includes an mounting section and an impeller body section arranged sequentially along the axial direction, and the mounting section and the impeller body section are integrally formed; a washer mounting seat is provided at the mounting section of the impeller component; the thrust washer is installed in the washer mounting seat of the impeller component by a snap-fit ​​method.

[0011] In the above technical solution, the upper end face of the thrust washer protrudes outward from the washer mounting seat of the impeller component; or, the upper end face of the thrust washer is flush with the washer mounting seat of the impeller component.

[0012] In the above technical solution, the bottom of the impeller component's gasket mounting seat is configured as a flat bottom retaining wall; and the sidewall of the impeller component's gasket mounting seat extends radially to form an axial retaining rib; the lower end face of the thrust washer extends radially to form an axial retaining disc; the thrust washer is embedded in the impeller component's gasket mounting seat, so that the lower end face of the thrust washer abuts against the bottom retaining wall of the gasket mounting seat, and the axial retaining disc of the thrust washer is limited by the axial retaining rib of the gasket mounting seat.

[0013] In the above technical solution, the inner wall of the impeller component gasket mounting seat extends radially to form a circumferential retaining rib; the side surface of the thrust washer is concave radially to form a circumferential retaining groove; the circumferential retaining rib of the gasket mounting seat is embedded in the circumferential retaining groove of the thrust washer.

[0014] In the above technical solution, the impeller body section of the impeller component includes a blade platform, blades, and an impeller cover arranged sequentially along the axial direction; the blade platform of the impeller body section is axially connected to the mounting section.

[0015] In the above technical solution, the upper end face of the thrust washer is provided with a plurality of water lubrication grooves arranged in the radial direction.

[0016] A rotor-impeller mechanism includes the impeller assembly described above; it also includes a shaft member and a rotor assembly; the mounting section of the impeller member and the rotor assembly are both sleeved on the shaft member, so that the shaft member, the impeller assembly and the rotor assembly rotate coaxially.

[0017] In the above technical solution, the rotor-impeller mechanism of this utility model further includes a mounting bushing; a bushing mounting seat is provided at the mounting section of the impeller component; the mounting bushing is embedded and fixed in the bushing mounting seat of the impeller component; the mounting bushing is sleeved on the rotating shaft component in an interference fit manner.

[0018] In the above technical solution, at least one end of the rotating shaft component is narrowed to form a bearing mating section.

[0019] An electronic water pump includes the rotor-impeller mechanism described above.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: The impeller assembly, rotor-impeller mechanism, and electronic water pump using the present utility model include an mounting section and an impeller body section arranged sequentially along the axial direction. The mounting section and the impeller body section are integrally formed structures, and the entire impeller assembly can be obtained by injection molding without the need for ultrasonic welding. A gasket mounting seat is provided at the mounting section of the impeller assembly, and the thrust gasket is installed in the gasket mounting seat of the impeller assembly by snap-fit. The assembly of the thrust gasket can be completed simply by snapping the thrust gasket into the gasket mounting seat of the impeller assembly without the need for plastic coating. The impeller assembly, rotor-impeller mechanism, and electronic water pump using the present utility model have the characteristics of compact structure and simple assembly, which simplifies the assembly process of the electronic water pump and improves the assembly efficiency of the electronic water pump. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention.

[0022] Figure 2 This is an exploded view of the present invention.

[0023] Figure 3 This is a cross-sectional view of the present invention.

[0024] Figure 4 This is a cross-sectional view of the impeller assembly in this utility model.

[0025] Figure 5 This is a structural view of the thrust washer in this utility model.

[0026] The attached figures are labeled as follows: 10, impeller assembly; 101, mounting section; 101a, gasket mounting seat; 101b, bottom retaining wall; 101c, axial retaining rib; 101d, circumferential retaining rib; 101e, bushing mounting seat; 102, impeller body section; 102a, blade; 102b, blade platform; 102c, impeller cover; 20, thrust washer; 201, axial retaining disc; 202, circumferential retaining groove; 203, water lubrication groove; 30, shaft assembly; 301, bearing mating section; 40, rotor assembly; 401, rotor core; 402, permanent magnet; 403, steel sleeve; 50, mounting bushing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This embodiment provides an impeller assembly that can be used in water pumps (especially electric water pumps) and can drive the flow of liquid media when rotating.

[0029] Please see Figures 1-5 The impeller assembly in this embodiment includes an impeller component 10 and a thrust washer 20.

[0030] The impeller component 10 is an integrally injection-molded engineering plastic component, and the thrust washer 20 is made of ceramic, graphite or metal. In this embodiment, the thrust washer 20 is made of ceramic.

[0031] The impeller component 10 includes an installation section 101 and an impeller body section 102 arranged sequentially along the axial direction, and the installation section 101 and the impeller body section 102 are integrally formed structures.

[0032] A gasket mounting seat 101a is provided at the mounting section 101 of the impeller component 10. The gasket mounting seat 101a is integrally injection molded with the impeller component 10.

[0033] The thrust washer 20 is installed in the washer mounting seat 101a of the impeller component 10 by means of snap-fit.

[0034] Specifically, the upper end face of the thrust washer 20 protrudes outward from the washer mounting seat 101a of the impeller component 10; or, the upper end face of the thrust washer 20 is flush with the washer mounting seat 101a of the impeller component 10. In this embodiment, the upper end face of the thrust washer 20 protrudes outward from the washer mounting seat 101a of the impeller component 10. In this way, the axial thrust function of the thrust washer 20 can be realized.

[0035] Please refer to the following in particular Figure 3 and Figure 4 Specifically, the gasket mounting seat 101a of the impeller component 10 has a flat bottom retaining wall 101b at its bottom, and the sidewall of the gasket mounting seat 101a of the impeller component 10 extends radially to form an axial retaining rib 101c. In fact, both the bottom retaining wall 101b and the axial retaining rib 101c are integrally injection-molded plate-rib structures with the impeller component 10. The lower end face of the thrust washer 20 extends radially to form an axial retaining disk 201. In fact, the axial retaining disk 201 is... The thrust washer 20 is integrally formed with a plate-rib structure. The thrust washer 20 is embedded in the washer mounting seat 101a of the impeller component 10, so that the lower end face of the thrust washer 20 abuts against the bottom retaining wall 101b of the washer mounting seat 101a, and the axial retaining plate 201 of the thrust washer 20 is limited by the axial retaining rib 101c of the washer mounting seat 101a. In this way, the thrust washer 20 is limited in the axial direction in the washer mounting seat 101a of the impeller component 10, thereby realizing the installation of the thrust washer 20.

[0036] Furthermore, the inner wall of the gasket mounting seat 101a of the impeller component 10 extends radially to form a circumferential retaining rib 101d. In fact, the circumferential retaining rib 101d is a plate rib structure integrally injection molded with the impeller component 10. The side surface of the thrust washer 20 is concave radially to form a circumferential retaining groove 202. In fact, the circumferential retaining groove 202 is a groove structure integrally molded with the thrust washer 20. The circumferential retaining rib 101d of the gasket mounting seat 101a is embedded in the circumferential retaining groove 202 of the thrust washer 20. In this way, the thrust washer 20 can be limited in the circumferential direction to prevent the thrust washer 20 from rotating and slipping.

[0037] Specifically, the impeller body section 102 of the impeller component 10 includes a blade platform 102b, blades 102a, and an impeller cover 102c arranged sequentially along the axial direction. The blade platform 102b is an integrally formed platform-shaped structure, the blades 102a are several arc-shaped sheet-like structures arranged circumferentially on the blade platform 102b, and the impeller cover 102c is an integrally formed cover-like structure. The blade platform 102b of the impeller body section 102 is axially connected to the mounting section 101, so that the mounting section 101 and the impeller body section 102 form an integrally formed structure.

[0038] Furthermore, the upper end face of the thrust washer 20 is provided with a plurality of water lubrication grooves 203 arranged in the radial direction, so that the liquid medium can enter the upper end face of the thrust washer 20 through the water lubrication grooves 203, thereby providing water lubrication function for the thrust washer 20.

[0039] This embodiment also provides a rotor-impeller mechanism that can be applied in water pumps (especially electronic water pumps), which can be magnetically driven by the stator assembly to achieve rotation, thereby driving the flow of liquid medium.

[0040] The rotor-impeller mechanism of this embodiment includes the impeller assembly described above.

[0041] The rotor-impeller mechanism of this embodiment further includes a shaft component 30 and a rotor assembly 40.

[0042] The rotating shaft component 30 is a metal shaft-shaped component, and the rotor assembly 40 includes a rotor core 401, a permanent magnet 402 inserted into the rotor core 401, and a steel sleeve 403 covering the surface of the rotor core 401. The rotor core 401 is made of several stacked silicon steel sheets. The permanent magnet 402, also known as a magnetic tile, is a sheet-like body with permanent magnetism. The steel sleeve 403 is made of magnetically conductive material and has a steel sleeve body and an upper end cover. The steel sleeve body and the upper end cover are combined to form the steel sleeve 403.

[0043] The mounting section 101 of the impeller assembly 10 and the rotor assembly 40 are both sleeved on the shaft assembly 30, so that the shaft assembly 30, the impeller assembly and the rotor assembly 40 rotate coaxially.

[0044] It should be noted that in this embodiment, the rotor core 401 of the rotor assembly 40 is fixed to the rotating shaft member 30 by an interference fit, and the steel sleeve 403 of the rotor assembly 40 is fixed to the rotating shaft member 30 by laser welding, thereby realizing the coaxial rotation of the rotating shaft member 30 and the rotor assembly 40.

[0045] Specifically, the rotor-impeller mechanism of this embodiment further includes a mounting bushing 50, which is a cylindrical component made of metal. A bushing mounting seat 101e is provided at the mounting section 101 of the impeller component 10. In this embodiment, the gasket mounting seat 101a and the bushing mounting seat 101e of the impeller component 10 are arranged sequentially along the axial direction and separated by a bottom retaining wall 101b. The mounting bushing 50 is embedded and fixed in the bushing mounting seat 101e of the impeller component 10. In this embodiment, the mounting bushing 50 is integrally injection molded and encased in the bushing mounting seat 101e of the impeller component 10. The mounting bushing 50 is sleeved on the rotating shaft component 30 in an interference fit manner, thereby realizing the coaxial rotation of the rotating shaft component 30 and the impeller assembly.

[0046] Furthermore, the outer surface of the mounting bushing 50 is knurled to enhance the bonding force between the mounting bushing 50 and the bushing mounting seat 101e of the impeller component 10.

[0047] Furthermore, at least one end of the rotating shaft member 30 is narrowed to form a bearing mating section 301. In this embodiment, both ends of the rotating shaft member 30 are narrowed, thereby forming a bearing mating section 301 at both ends of the rotating shaft member 30.

[0048] An electronic water pump includes the rotor-impeller mechanism described above.

[0049] In this embodiment, the rotor-impeller mechanism is manufactured by first prefabricating the thrust washer 20 (sintered), the shaft component 30 (integral die casting or machining), the rotor assembly 40, and the mounting bushing 50 (integral die casting or machining). Then, the mounting bushing 50 is placed into the molding mold of the impeller component 10, and plastic material is injected into the mold. After cooling and solidification, the mold is removed, resulting in the assembly of the impeller component 10 and the mounting bushing 50. During impeller assembly, only the circumferential retaining groove 202 of the thrust washer 20 needs to be aligned with the axial retaining rib 101c of the washer mounting seat 101a. Then, the thrust washer 20 is pressed into the washer mounting seat 101a, so that the lower end face of the thrust washer 20 abuts against the bottom retaining wall 101b of the washer mounting seat 101a, and the axial retaining disc of the thrust washer 20... 201 is limited by the axial retaining rib 101c of the gasket mounting seat 101a. At this time, the thrust washer 20 is embedded in the gasket mounting seat 101a of the impeller component 10, and the axial, radial and circumferential directions of the thrust washer 20 are all limited, making it difficult to dislodge or slip. When assembling the rotor-impeller mechanism, it is only necessary to fix the rotor core 401 of the rotor assembly 40 to the shaft component 30 by interference fit, and fix the steel sleeve 403 of the rotor assembly 40 to the shaft component 30 by laser welding, thus completing the connection between the rotor assembly 40 and the shaft component 30. It is only necessary to press the mounting bushing 50 in the impeller component 10 to the corresponding position of the shaft component 30, thus completing the connection between the impeller component 10 and the shaft component 30. Thus, the assembly of the rotor-impeller mechanism is completed.

[0050] When the rotor-impeller mechanism of this embodiment is applied to an electric water pump, two coaxial bearings need to be configured in the pump chamber of the electric water pump (usually configured in the bearing housing at the bottom of the pump chamber and the bearing bracket on the pump cover, respectively). Simply insert the bearing mating section 301 of the rotating shaft component 30 into the bearing, so that the bearing mating section 301 of the rotating shaft component 30 is supported by the bearing, the combination of the rotating shaft component 30, the impeller assembly, and the rotor assembly 40 can rotate coaxially in the pump chamber of the electric water pump. After the stator assembly of the electric water pump is energized, it can magnetically drive the rotor assembly 40 to rotate, and then drive the impeller assembly to rotate through the rotating shaft component 30. The rotating impeller assembly can drive the liquid medium to flow through its blades 102a, thereby realizing the basic function of the electric water pump. In the above process, the thrust washer 20 can contact the bearing or the bearing bracket of the pump cover to avoid wear of the impeller component 10 and reduce the axial displacement of the rotor-impeller mechanism, thus playing a thrust-resistant role.

[0051] The impeller assembly, rotor-impeller mechanism, and electronic water pump using the same in this embodiment include an impeller component 10 comprising an mounting section 101 and an impeller body section 102 arranged sequentially along the axial direction. The mounting section 101 and the impeller body section 102 are integrally formed, and the entire impeller component 10 can be obtained through injection molding without the need for ultrasonic welding. A gasket mounting seat 101a is provided at the mounting section 101 of the impeller component 10. The thrust washer 20 is installed in the gasket mounting seat 101a of the impeller component 10 by snap-fit. The assembly of the thrust washer 20 can be completed simply by snapping the thrust washer 20 into the gasket mounting seat 101a of the impeller component 10 without the need for plastic coating. The impeller assembly, rotor-impeller mechanism, and electronic water pump using the same in this embodiment have the characteristics of compact structure and simple assembly, which simplifies the assembly process of the electronic water pump and improves the assembly efficiency of the electronic water pump.

[0052] Although embodiments of the present invention 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 to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An impeller assembly, characterized in that, Including impeller components and thrust washers; The impeller component includes an mounting section and an impeller body section arranged sequentially along the axial direction, and the mounting section and the impeller body section are integrally formed structures; A gasket mounting seat is provided at the mounting section of the impeller component; The thrust washer is installed in the washer mounting seat of the impeller component by means of a snap-fit.

2. The impeller assembly according to claim 1, characterized in that, The upper end face of the thrust washer protrudes outward from the washer mounting seat of the impeller component; Alternatively, the upper surface of the thrust washer is flush with the washer mounting base of the impeller component.

3. The impeller assembly according to claim 1 or 2, characterized in that, The impeller component's gasket mounting base has its bottom configured as a flat bottom retaining wall; Furthermore, the sidewall of the impeller component's gasket mounting seat extends radially to form an axial retaining rib; The lower end face of the thrust washer extends radially to form an axial retaining disc; The thrust washer is fitted into the washer mounting seat of the impeller component, such that the lower end face of the thrust washer abuts against the bottom retaining wall of the washer mounting seat, and the axial retaining plate of the thrust washer is limited by the axial retaining rib of the washer mounting seat.

4. The impeller assembly according to claim 3, characterized in that, The impeller component's gasket mounting seat has an inner sidewall that extends radially to form a circumferential retaining rib. The side surface of the thrust washer is concave in the radial direction to form a circumferential retaining groove; The circumferential retaining rib of the gasket mounting base is embedded in the circumferential retaining groove of the thrust washer.

5. The impeller assembly according to claim 1, characterized in that, The impeller body section of the impeller component includes a blade platform, blades, and an impeller cover arranged sequentially along the axial direction. The blade platform of the impeller body section is axially connected to the mounting section.

6. The impeller assembly according to claim 1, characterized in that, The upper end face of the thrust washer is provided with several water lubrication grooves arranged in the radial direction.

7. A rotor-impeller mechanism, characterized in that, Includes the impeller assembly as described in any one of claims 1-6; It also includes shaft components and rotor assemblies; The mounting section of the impeller component and the rotor assembly are both sleeved on the rotating shaft component, so that the rotating shaft component, the impeller assembly and the rotor assembly rotate coaxially.

8. The rotor-impeller mechanism according to claim 7, characterized in that, This also includes installing bushings; A bushing mounting seat is provided at the mounting section of the impeller component; The mounting bushing is embedded in and fixed in the bushing mounting seat of the impeller component; The mounting bushing is fitted onto the rotating shaft component with an interference fit.

9. The rotor-impeller mechanism according to claim 7 or 8, characterized in that, At least one end of the rotating shaft component narrows to form a bearing mating section.

10. An electronic water pump, characterized in that, Includes the rotor-impeller mechanism as described in any one of claims 7-9.

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