WO2023226513A1

WO2023226513A1 - Rotor assembly and electronic water pump

Info

Publication number: WO2023226513A1
Application number: PCT/CN2023/079894
Authority: WO
Inventors: 王俊杰; 周小伟
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-05-27
Filing date: 2023-03-06
Publication date: 2023-11-30
Also published as: CN217401179U

Abstract

A rotor assembly and an electronic water pump. The rotor assembly comprises: an impeller base (10) which is of an integrated structure and is provided with an annular slot (11); an iron core assembly (20) which is mounted in the annular slot (11); and a blocking cover (30) which is connected to the impeller base (10) to block an opening of the annular slot (11). According to the rotor assembly, the iron core assembly does not need to be independently subjected to injection molding, the impeller base is configured to be of an integrated structure, then the iron core assembly is mounted in the annular slot, and the blocking cover is used to block the annular slot, such that the problem in the prior art that the dynamic balance of the rotor assembly is difficult to meet the requirement because the iron core assembly is easy to be extruded and deformed due to an overlarge injection molding pressure is avoided, thereby effectively improving the performance of the rotor assembly.

Description

Rotor components and electronic water pump

This application requires priority for the patent application submitted to the China State Intellectual Property Office on May 27, 2022, with the application number 202221331881.1 and the invention name "Rotor Assembly and Electronic Water Pump".

Technical field

The present application relates to the technical field of electronic water pumps, specifically, to a rotor assembly and an electronic water pump.

Background technique

The electronic water pump is the core component of the vehicle cooling system. The rotor assembly of the electronic water pump generally includes an impeller cover, an impeller base and an iron core assembly. The iron core assembly includes magnets and iron cores. In order to prevent the magnets and iron cores from rusting and affecting the The performance of the rotor assembly requires sealing and protection of the magnets and iron core. In the prior art, magnetic steel is usually placed in the iron core slot and then externally coated by injection molding. The coated iron core component is again injection molded as an insert to form the impeller base, and finally the impeller base and the impeller cover are ultrasonically welded to form the impeller base. Rotor assembly. The injection molding process of the above method is complicated, and the high injection pressure can easily squeeze and deform the iron core, making it difficult for the dynamic balance of the rotor assembly to meet the requirements, which in turn causes the electronic water pump to vibrate.

Application content

This application provides a rotor assembly and an electronic water pump to solve the problem of complex rotor assembly technology in the prior art.

In order to solve the above problems, according to one aspect of the application, the application provides a rotor assembly, including: an impeller base, the impeller base is an integrated structure, the impeller base has an annular groove; an iron core assembly, the iron core assembly is installed in the annular groove ; The blocking cover is connected to the impeller base to block the opening of the annular groove.

Further, the impeller base is an integral structure of injection molding. The impeller base includes an outer cylinder and an inner cylinder arranged coaxially. The inner cylinder is located in the cavity of the outer cylinder. The area between the inner cylinder and the outer cylinder forms an annular groove, and the sealing cover Connected to both the outer cylinder and the inner cylinder.

Further, the blocking cover includes an annular plate and a first annular welding groove and a second annular welding groove provided on the annular plate. The end of the outer cylinder is welded to the inner wall of the first annular welding groove, and the end of the inner cylinder is welded to the inner wall of the first annular welding groove. The inner wall of the two annular welding grooves is welded; or, the blocking cover includes an annular plate and a third annular rib and a fourth annular rib provided on the annular plate, the end of the outer cylinder and the outer wall of the third annular rib are welded, and the inner cylinder The end and the outer wall of the fourth ring rib are welded.

Further, the outer cylinder includes a first cylinder and a first annular rib provided at the end of the first cylinder, and the inner cylinder includes a second cylinder and a second annular rib provided at the end of the second cylinder. The first cylinder The area between the body and the second cylinder forms an annular groove. The first annular rib extends into the first annular welding groove and is welded to the inner wall of the first annular welding groove. The second annular rib extends into the second annular welding groove and is welded to the inner wall of the first annular welding groove. Weld with the inner wall of the second annular welding groove.

Further, the blocking cover also includes a first support ring and a second support ring arranged on the annular plate. The diameter of the first support ring is larger than the diameter of the second support ring. The first support ring and the second support ring are both located on the third support ring. Between an annular welding groove and a second annular welding groove, the first support ring and the second support ring are both in contact with the end surface of the iron core assembly.

Further, the outer wall of the inner cylinder has a limiting groove, and the iron core assembly has a limiting convex rib, and the limiting convex rib is located in the limiting groove to limit the circumferential position of the iron core assembly; or, the inner cylinder The outer side wall of the iron core assembly has a limiting convex rib, and the iron core assembly has a limiting groove. The limiting convex rib is located in the limiting groove to limit the circumferential position of the iron core assembly.

Further, the iron core assembly includes magnetic steel and an iron core. The iron core has a placement slot and an installation hole. The magnet steel is arranged in the placement slot. The inner wall of the installation hole has a limiting convex rib, wherein the limiting convex rib and the limiting concave There are multiple grooves, and multiple limiting ribs and multiple limiting grooves are provided in one-to-one correspondence.

Further, the impeller base further includes a transition portion and an annular member. One end of the transition portion is connected to the annular member, and the other end of the transition portion is connected to the outer cylinder and/or the inner cylinder.

Further, the impeller base also includes a fixed cylinder, which is fixedly arranged in the inner cylinder. The impeller base has a connecting hole that penetrates the fixed cylinder and the transition part; the rotor assembly also includes an impeller cover, and the ring member is connected to the impeller cover.

According to another aspect of the present application, an electronic water pump is provided. The electronic water pump includes the above-mentioned rotor assembly.

Applying the technical solution of this application, a rotor assembly is provided, including: an impeller base, which is an integrated structure and has an annular groove; an iron core assembly, which is installed in the annular groove; and a sealing cover, which blocks The cover is connected to the impeller base to block the opening of the annular groove. Using this solution, you only need to set the impeller base into an integrated structure, install the iron core assembly in the annular groove, and then seal the opening of the annular groove with a blocking cover, thus completing the installation of the iron core assembly on the impeller base. In the existing technology, the manufacturing method of first injection molding the iron core assembly, and then injection molding the coated iron core assembly as an insert to form the impeller base is abandoned. By using the rotor assembly of this solution, there is no need to mold the iron core assembly. Injection molding is performed separately, but the impeller base is set into an integrated structure, and then the iron core assembly is installed in the annular groove, and a sealing cover is used to seal the annular groove, which avoids the injection molding pressure in the existing technology. If it is too large, it will easily squeeze and deform the core assembly, causing the dynamic balance of the rotor assembly to be difficult to meet the requirements, thus effectively improving the performance of the rotor assembly.

Description of the drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the attached picture:

Figure 1 shows an exploded view of a rotor assembly provided by an embodiment of the present application;

Figure 2 shows a cross-sectional view of the rotor assembly of Figure 1;

Figure 3 shows an enlarged partial view of the rotor assembly in Figure 2;

Figure 4 shows a cross-sectional view of the impeller base in the rotor assembly of Figure 1;

Figure 5 shows a bottom view of the impeller base in Figure 4;

FIG. 6 shows a schematic structural diagram of the blocking cap in FIG. 1 .

Among them, the above-mentioned drawings include the following reference signs:

10. Impeller base; 11. Annular groove; 12. Outer cylinder; 121. First cylinder; 122. First annular rib; 13. Inner cylinder; 131. Second cylinder; 132. Second annular rib; 133. Limiting groove; 14. Transition part; 15. Ring piece; 16. Fixed cylinder; 17. Connection hole;

20. Iron core assembly; 21. Limiting ribs; 22. Magnetic steel; 23. Iron core; 231. Installation holes;

30. Blocking cover; 31. Annular plate; 32. First annular welding groove; 33. Second annular welding groove; 34. First support ring; 35. Second support ring;

40. Impeller cover.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application or its application or uses. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

As shown in Figures 1 to 6, the embodiment of the present application provides a rotor assembly, including: an impeller base 10, which is an integrated structure and has an annular groove 11; an iron core assembly 20, which is an integral structure. 20 is installed in the annular groove 11; the blocking cover 30 is connected to the impeller base 10 to block the opening of the annular groove 11.

Using this solution, you only need to set the impeller base 10 into an integrated structure, install the iron core assembly 20 in the annular groove 11, and then seal the opening of the annular groove 11 with the blocking cover 30, thus completing the iron core assembly. The component 20 is installed in the impeller base 10. This method abandons the existing manufacturing method of first injection molding the iron core component 20, and then using the molded core component 20 as an insert to injection mold again to form the impeller base 10. This solution is used For the rotor assembly, it is not necessary to injection mold the iron core assembly 20 separately. Instead, the impeller base 10 is set into an integrated structure, and then the iron core assembly 20 is installed in the annular groove 11, and a blocking cover 30 is used to seal the annular groove. 11. The sealing method can seal the iron core assembly 20 to prevent corrosion and oxidation, and at the same time avoids the difficulty in dynamic balancing of the rotor assembly due to the excessive injection pressure in the prior art that easily causes the iron core assembly 20 to be extruded and deformed. meet the requirements, thereby effectively improving the performance of the rotor assembly.

Among them, the impeller base 10 is an integral structure of injection molding. The impeller base 10 includes an outer cylinder 12 and an inner cylinder 13 arranged coaxially. The inner cylinder 13 is located in the cavity of the outer cylinder 12. The area between the inner cylinder 13 and the outer cylinder 12 An annular groove 11 is formed, and the blocking cover 30 is connected to both the outer cylinder 12 and the inner cylinder 13 . By arranging the outer cylinder 12 and the inner cylinder 13, and the outer cylinder 12 and the inner cylinder 13 are coaxially arranged, an annular groove 11 can be formed to facilitate the installation of the iron core assembly 20 in the annular groove 11; the blocking cover 30 and the outer cylinder 12 , the inner cylinder 13 are all connected, thus enhancing the stability of the connection between the blocking cover 30 and the impeller base. The impeller base 10 is an integral structure formed by injection molding, so that the iron core assembly 20 does not need to be injection molded separately, and the injection molding process is simple.

Further, the blocking cover 30 includes an annular plate 31 and a first annular welding groove 32 and a second annular welding groove 33 provided on the annular plate 31, and the end of the outer cylinder 12 is welded to the inner wall of the first annular welding groove 32, The end of the inner cylinder 13 is welded to the inner wall of the second annular welding groove 33 . By providing the first annular welding groove 32 and welding the end of the outer cylinder 12 and the inner wall of the first annular welding groove 32, This increases the effective area for welding between the end of the outer cylinder 12 and the blocking cover 30 and improves the connection strength; a second annular welding groove 33 is provided, and the end of the inner cylinder 13 is welded to the inner wall of the second annular welding groove 33. This increases the effective area for welding between the end of the inner cylinder 13 and the blocking cover 30 and improves the connection strength.

Alternatively, the blocking cover 30 includes an annular plate 31 and a third annular rib and a fourth annular rib provided on the annular plate. The end of the outer cylinder 12 is welded to the outer wall of the third annular rib, and the end of the inner cylinder 13 is welded to the outer wall of the third annular rib. The outer wall of the four-ring rib is welded. Adopting the above arrangement method can also increase the effective welding area between the end of the outer cylinder 12 and the blocking cover 30 and improve the connection strength; the effective welding area between the end of the inner cylinder 13 and the blocking cover 30 can also be increased and improve the connection strength. strength.

Further, the outer cylinder 12 includes a first cylinder 121 and a first annular rib 122 disposed at the end of the first cylinder 121 , and the inner cylinder 13 includes a second cylinder 131 and a third annular rib disposed at the end of the second cylinder 131 . Two annular ribs 132, the area between the first cylinder 121 and the second cylinder 131 forms an annular groove 11, the first annular rib 122 extends into the first annular welding groove 32 and is welded to the inner wall of the first annular welding groove 32 , the second annular rib 132 extends into the second annular welding groove 33 and is welded to the inner wall of the second annular welding groove 33 . The first annular rib 122 is extended into the first annular welding groove 32 and welded to the inner wall of the first annular welding groove 32, which can not only play a positioning role, but also enhance the connection strength between the outer cylinder 12 and the blocking cover 30; The second annular rib 132 is extended into the second annular welding groove 33 and welded to the inner wall of the second annular welding groove 33, which not only plays a positioning role, but also enhances the connection strength between the inner cylinder 13 and the blocking cover 30. Among them, the above-mentioned welding method is ultrasonic welding.

Specifically, the ends of the first annular rib 122 and the second annular rib 132 are V-shaped; the first annular welding groove 32 and the second annular welding groove 33 are also V-shaped; the first cylinder 121 and the second cylinder 131 are evenly in contact with the annular plate, which can achieve a positioning effect, improve assembly accuracy, increase the contact area, and improve the welding effect and sealing effect.

Among them, the blocking cover 30 also includes a first support ring 34 and a second support ring 35 provided on the annular plate 31. The diameter of the first support ring 34 is larger than the diameter of the second support ring 35. The first support ring 34 and the second support ring 35 are arranged on the annular plate 31. The two support rings 35 are located between the first annular welding groove 32 and the second annular welding groove 33 , and the first support ring 34 and the second support ring 35 are both in contact with the end surface of the iron core assembly 20 . The first support ring 34 is provided to be able to contact the outer end surface of the iron core assembly 20, and the second support ring 35 is provided to be able to contact the inner end surface of the iron core assembly 20, thus ensuring that the blocking cover 30 can fully contact the iron core assembly 20. , ensuring the stability of the rotor assembly during operation.

In this embodiment, the outer wall of the inner cylinder 13 has a limiting groove 133, and the core assembly 20 has a limiting convex rib 21. The limiting convex rib 21 is located in the limiting groove 133 to prevent the iron core assembly 20 from moving. Limit in circumferential direction. The limiting convex ribs 21 are arranged in the limiting grooves 133 to limit the iron core assembly 20 in the circumferential direction and prevent the iron core assembly 20 from rotating.

Alternatively, the outer wall of the inner cylinder 13 has a limiting convex rib 21, and the iron core assembly 20 has a limiting groove 133. The limiting convex rib 21 is located in the limiting groove 133 to limit the circumferential direction of the iron core assembly 20. Bit. In this way, the iron core assembly 20 can also be limited in the circumferential direction to prevent the iron core assembly 20 from rotating.

The iron core assembly 20 includes a magnet 22 and an iron core 23. The iron core 23 has a placement slot and a mounting hole 231. The magnet 22 is arranged in the placement slot. The inner wall of the mounting hole 231 has a limiting convex rib 21 or a limiting recess. The groove 133 has a plurality of limiting convex ribs 21 and a plurality of limiting grooves 133 , and the plurality of limiting convex ribs 21 and the plurality of limiting grooves 133 are arranged in one-to-one correspondence. Multiple limiting convex ribs 21 and multiple limiting grooves 133 are provided, and the plurality of limiting convex ribs 21 and the plurality of limiting grooves 133 are arranged in one-to-one correspondence. This step prevents the core assembly 20 from rotating. In this solution, the inner wall of the mounting hole 231 can be provided with limiting ribs 23 or limiting grooves 133, which can limit the circumferential position of the core assembly 20.

Specifically, a plurality of limiting grooves 133 are distributed along the circumferential direction of the outer wall of the inner cylinder 13 , and a plurality of limiting ribs 21 are distributed along the circumferential direction of the inner wall of the mounting hole 231 .

In this embodiment, the impeller base 10 further includes a transition portion 14 and an annular member 15 . One end of the transition portion 14 is connected to the annular member 15 , and the other end of the transition portion 14 is connected to the outer cylinder 12 and/or the inner cylinder 13 . Through the above arrangement, it is convenient to connect the ring member 15 with other structures.

Among them, the impeller base 10 also includes a fixed cylinder 16, which is fixedly arranged in the inner cylinder 13. The impeller base 10 has a connecting hole 17, and the connecting hole 17 penetrates the fixed cylinder 16 and the transition part 14; the rotor assembly also includes an impeller cover 40, The ring member 15 and the impeller cover 40 are connected. The ring member 15 is provided to be connected to the impeller cover 40. The connection method is welding. The welding connection method is more stable and reliable.

In another embodiment not shown in the figure, an electronic water pump is provided, and the electronic water pump includes the above-mentioned rotor assembly. Using this solution, you only need to set the impeller base 10 into an injection-molded integrated structure, install the iron core assembly 20 in the annular groove 11, and then seal the opening of the annular groove 11 with the blocking cover 30, and you are done. The iron core assembly 20 is installed in the impeller base 10, and the existing manufacturing method of first injection molding the iron core assembly 20 and then using the molded iron core assembly 20 as an insert to form the impeller base 10 is abandoned. Using the rotor assembly of this solution, it is only necessary to set the impeller base 10 into an integrated structure of injection molding. There is no need to injection mold the iron core assembly 20 separately. The injection molding process is simple, and the sealing cover 30 is used to seal the annular groove 11. The blocking method can seal the iron core assembly 20 to prevent corrosion and oxidation. At the same time, it avoids the problem in the prior art that the iron core assembly 20 is easily squeezed and deformed due to excessive injection pressure, which makes the dynamic balance of the rotor assembly difficult to meet the requirements. problem, thereby effectively improving the performance of the electronic water pump.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A rotor assembly, characterized by including:

Impeller base (10), the impeller base (10) is an integrated structure, and the impeller base (10) has an annular groove (11);

Iron core assembly (20), the iron core assembly (20) is installed in the annular groove (11);

A blocking cover (30) is connected to the impeller base (10) to block the opening of the annular groove (11).
The rotor assembly according to claim 1, characterized in that the impeller base (10) is an integral structure of injection molding, and the impeller base (10) includes an outer cylinder (12) and an inner cylinder (13) arranged coaxially. ), the inner cylinder (13) is located in the cavity of the outer cylinder (12), and the area between the inner cylinder (13) and the outer cylinder (12) forms the annular groove (11), so The blocking cover (30) is connected to the outer cylinder (12) and the inner cylinder (13).
The rotor assembly according to claim 2, characterized in that the blocking cover (30) includes an annular plate (31) and a first annular welding groove (32) and a third annular welding groove (32) provided on the annular plate (31). Two annular welding grooves (33), the end of the outer cylinder (12) and the inner wall of the first annular welding groove (32) are welded, and the end of the inner cylinder (13) and the second annular welding groove are welded. The inner wall of the groove (33) is welded; or, the blocking cover (30) includes an annular plate (31) and a third annular rib and a fourth annular rib provided on the annular plate (31), and the outer cylinder The end of (12) is welded to the outer wall of the third annular rib, and the end of the inner tube (13) is welded to the outer wall of the fourth annular rib.
The rotor assembly according to claim 3, characterized in that the outer cylinder (12) includes a first cylinder (121) and a first annular rib (122) provided at an end of the first cylinder (121). ), the inner cylinder (13) includes a second cylinder (131) and a second annular rib (132) provided at the end of the second cylinder (131), the first cylinder (121) and The area between the second cylinders (131) forms the annular groove (11), and the first annular rib (122) extends into the first annular welding groove (32) and is connected with the first annular welding groove (32). The inner wall of the annular welding groove (32) is welded, and the second annular rib (132) extends into the second annular welding groove (33) and is welded to the inner wall of the second annular welding groove (33).
The rotor assembly according to claim 3, characterized in that the blocking cover (30) further includes a first support ring (34) and a second support ring (35) provided on the annular plate (31) , the diameter of the first support ring (34) is larger than the diameter of the second support ring (35), and both the first support ring (34) and the second support ring (35) are located on the first Between the annular welding groove (32) and the second annular welding groove (33), the first support ring (34) and the second support ring (35) are both in contact with the core assembly (20) End face contact.
The rotor assembly according to claim 2, characterized in that the outer wall of the inner cylinder (13) has a limiting groove (133), and the iron core assembly (20) has a limiting convex rib (21), The limiting rib (21) is located in the limiting groove (133) to limit the circumferential position of the iron core assembly (20); or, the outer wall of the inner cylinder (13) It has a limiting convex rib (21), and the iron core assembly (20) has a limiting groove (133). The limiting convex rib (21) is located in the limiting groove (133) to control the The iron core assembly (20) is circumferentially limited.
The rotor assembly according to claim 6, characterized in that the iron core assembly (20) includes magnetic steel (22) and an iron core (23), and the iron core (23) has a placement slot and a mounting hole (231 ), the magnet (22) is arranged in the placement groove, and the inner wall of the mounting hole (231) has the limiting rib (21) or the limiting groove (133), wherein the There are multiple limiting convex ribs (21) and multiple limiting grooves (133), and multiple limiting convex ribs (21) and multiple limiting grooves (133) are provided in one-to-one correspondence. .
The rotor assembly according to claim 2, wherein the impeller base (10) further includes a transition portion (14) and an annular member (15), and one end of the transition portion (14) is connected to the annular member (15). 15) Connection, the other end of the transition part (14) is connected with the outer cylinder (12) and/or the inner cylinder (13).
The rotor assembly according to claim 8, characterized in that the impeller base (10) further includes a fixed cylinder (16), the fixed cylinder (16) is fixedly arranged in the inner cylinder (13), the The impeller base (10) has a connecting hole (17) that penetrates the fixed barrel (16) and the transition part (14); the rotor assembly also includes an impeller cover (40), The ring member (15) is connected to the impeller cover (40).
An electronic water pump, characterized in that the electronic water pump includes the rotor assembly according to any one of claims 1 to 9.