Rotor structure for pump and pump

Abstract

The utility model belongs to the technical field of pumps, and provides a rotor structure for a pump and the pump, the rotor structure for the pump comprises a rotor shaft; the annular magnetic steel is provided with an inner hole in the axial direction, and the annular magnetic steel is coaxially arranged on the rotor shaft in a sleeving mode; the circular end plates are arranged at the two axial ends of the annular magnetic steel, each circular end plate comprises an end plate body and a positioning part which is arranged on one side of the end plate body and extends in the axial direction of the annular magnetic steel, and the positioning parts are inserted into inner holes of the annular magnetic steel and abut against the inner wall of the annular magnetic steel, so that the circular end plates and the annular magnetic steel are coaxially fixed.

Description

Technical Field

[0001] This utility model belongs to the field of pump technology, and in particular relates to a rotor structure for a pump and a pump. Background Technology

[0002] The existing water pump rotor structure is manufactured using injection molding. The rotor structure includes a rotor shaft, magnets, and circular end plates at both ends of the magnets. The magnets have a ring-shaped structure, with the rotor located at the center. The circular end plates are flat and located at both ends of the magnets. After injection molding, the space between the rotor shaft, the circular end plates, and the magnets is filled with plastic to ensure the rotor's sealing performance. The circular end plates are used to facilitate rotor balance, reducing vibration and noise during operation. Furthermore, the use of circular end plates during injection molding eliminates the possibility of ejector pins damaging the magnet ends and prevents exposed magnets at the ejector pin locations, thus avoiding rusting during use.

[0003] Since the above-mentioned magnets and circular end plates are injection molded to form a rotor, the coaxiality of the circular end plates and magnets needs to be ensured by centering fixtures. The rotor circular end plates and magnets need to be fixed with glue in advance. After solidification, the two are placed together in the injection molding equipment for injection molding.

[0004] The shortcomings of the above processing technology are that, on the one hand, the assembly process of the magnet and the circular end plate is complicated, which affects the production efficiency of the rotor; on the other hand, the centering tool is prone to wear during repeated use, and after long-term use, the coaxiality consistency of the rotor's circular end plate and the magnet cannot be guaranteed.

[0005] In addition, because the circular end plate is a flat plate structure and is not circumferentially fixed in the rotor, relative rotation is easily generated between the circular end plate and the injection-molded plastic body during operation, resulting in frequent rotor maintenance. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pump rotor structure that solves the problem of low production efficiency caused by the existing circular end plate and magnet being positioned by tooling and glued.

[0007] Another objective of this invention is to provide a pump that uses the aforementioned pump rotor structure to improve the pump's service life.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] A pump rotor structure, comprising:

[0010] Rotor shaft;

[0011] An annular magnet has an inner hole along its axial direction, and the annular magnet is coaxially sleeved on the rotor shaft.

[0012] A circular end plate is disposed at both axial ends of the annular magnet. The circular end plate includes an end plate body and a positioning part disposed on one side of the end plate body and extending along the axial direction of the annular magnet. The positioning part is inserted into the inner hole of the annular magnet and presses against the inner wall of the annular magnet so that the circular end plate and the annular magnet are coaxially fixed.

[0013] Preferably, the surface of the positioning part that presses against the annular magnet is an arc surface, and the arc surface transitions into the inner hole of the annular magnet.

[0014] Preferably, the positioning part has a groove on the surface that presses against the annular magnet.

[0015] Preferably, the positioning part is a fan-shaped body that extends outward along its axial direction from the inner side of the end plate body.

[0016] Preferably, the groove is an arc-shaped groove provided along the circumference.

[0017] Preferably, a first reinforcing connection groove is provided at both ends of the annular magnet. The first reinforcing connection groove is arranged circumferentially along the annular magnet and communicates with the inner hole of the annular magnet.

[0018] Preferably, at least one second reinforcing connection groove is provided on the two end faces and / or the inner side of the end plate body of the annular magnet, and each second reinforcing connection groove is connected to the first reinforcing connection groove.

[0019] Preferably, the second reinforcing connecting groove extends a predetermined depth from the end face of the annular magnet along the axial direction of the annular magnet.

[0020] Preferably, the pump rotor structure further includes a plastic body, the space between the annular magnet and the circular end plate is filled with the plastic body, and the annular magnet and the circular end plate are both covered with the plastic body.

[0021] A pump, comprising the aforementioned pump rotor structure.

[0022] Compared with existing technologies, this invention has the following advantages: In this invention, a positioning part is provided on one side of the circular end plate pump body, extending axially along the annular magnet. The positioning part is inserted into the inner hole of the annular magnet and presses against its inner wall. After installation, this ensures that the circular end plate and the annular magnet are coaxial and relatively fixed. After assembly, the annular magnet and the circular end plate can be placed into an injection molding machine together with the rotor shaft for injection molding. This solves the problem of low production efficiency caused by the existing method of positioning the circular end plate and magnet using tooling and adhesive bonding, thus improving production efficiency and reducing production costs. Furthermore, the dynamic balance performance of the pump rotor structure is improved after injection molding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the pump rotor structure in this utility model;

[0024] Figure 2 This is a cross-sectional view of the pump rotor structure in this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the annular magnet and the circular end plate in this utility model;

[0026] Figure 4 This is a cross-sectional view of the annular magnet and the circular end plate in this utility model;

[0027] Figure 5 This is a schematic diagram of the circular end plate in this utility model;

[0028] Figure 6 This is a front view of the circular end plate in this utility model;

[0029] Figure 7 This is a side view of the circular end plate in this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the annular magnet in this utility model;

[0031] Figure 9 This is a cross-sectional view of the annular magnet in this utility model;

[0032] Figure 10 This is a schematic diagram of the rotor shaft in this utility model;

[0033] Figure 11 This is a cross-sectional view of the rotor shaft in this utility model.

[0034] Among them, 1. Rotor shaft; 11. Anti-slip groove; 2. Annular magnet; 21. Second reinforcing connection groove; 23. First reinforcing connection groove; 3. Circular end plate; 31. End plate body; 32. Positioning part; 33. Groove; 4. Plastic body. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] like Figures 1-11 As shown, this embodiment provides a pump rotor structure, including a rotor shaft 1, an annular magnet 2, and a circular end plate 3. The annular magnet 2 has an axially oriented inner hole and is sleeved on the rotor shaft 1, coaxially arranged with it. The circular end plate 3 is located at both axial ends of the annular magnet 2. The circular end plate 3 includes an end plate body 31 and a positioning part 32 extending axially along the annular magnet 2 from one side of the end plate body 31. The positioning part 32 is inserted into the inner hole of the annular magnet 2 and presses against the inner wall of the annular magnet 2, thereby fixing the circular end plate 3 and the annular magnet 2 coaxially.

[0043] In this embodiment, a positioning part 32 is provided on one side of the pump body of the circular end plate 3, extending axially along the annular magnet 2. The positioning part 32 is inserted into the inner hole of the annular magnet 2 and presses against the inner wall of the annular magnet 2. After installation, the circular end plate 3 and the annular magnet 2 are ensured to be coaxial and relatively fixed. After the annular magnet 2 and the circular end plate 3 are assembled, they can be placed into the injection molding equipment together with the rotor shaft 1 for injection molding. This solves the problem of low production efficiency caused by the existing circular end plate 3 and magnet being positioned by tooling and glued, thus improving production efficiency and reducing production costs. Furthermore, the dynamic balance performance of the pump rotor structure after injection molding is improved.

[0044] In this embodiment, after the circular end plate 3 is installed on the annular magnet 2, the end face of the annular magnet 2 presses against the inner side of the circular end plate 3. In other embodiments, after the circular end plate 3 is installed, the end face of the annular magnet 2 and the inner side of the circular end plate 3 are spaced apart by a preset distance along the axial direction. After plastic injection molding, the plastic body 4 on the outer periphery of the annular magnet 2 and the plastic body 4 inside the annular magnet 2 are integrally connected.

[0045] The rotor shaft 1, annular magnet 2, and circular end plate 3 are integrally molded, and the annular magnet 2 and circular end plate 3 are sealed. Preferably, the pump rotor structure also includes a plastic body 4. After injection molding, the space between the annular magnet 2 and the circular end plate 3 is filled with the plastic body 4, and the annular magnet 2 and the circular end plate 3 are both covered with the plastic body 4. Filling the space between the annular magnet 2 and the circular end plate 3 with the plastic body 4 allows the formed pump rotor structure to completely isolate the external medium, and the plastic body 4 covering the annular magnet 2 and the circular end plate 3 further improves the sealing performance of the pump rotor structure.

[0046] Preferably, the surface of the positioning part 32 that abuts against the annular magnet 2 is an arc surface, and the arc surface transitions into the inner hole of the annular magnet 2, facilitating the assembly and disassembly of the circular end plate 3. In this embodiment, the outer surface of the positioning part 32 along the circumference of the end plate body 31 is an arc surface, and the outer surface of the positioning part 32 transitions into the annular magnet 2.

[0047] Preferably, the circular end plate 3 is provided with at least two sets of positioning parts 32. The at least two sets of positioning parts 32 are evenly distributed along the circumference of the circular end plate 3. After the positioning parts 32 are inserted into the annular magnet 2, the at least two sets of positioning parts 32 evenly distributed along the circumference ensure that the circular end plate 3 and the annular magnet 2 are subjected to uniform force, and better ensure the coaxiality of the circular end plate 3 and the annular magnet 2.

[0048] In this embodiment, there are four sets of positioning portions 32 on the circular end plate 3, and the four sets of positioning portions 32 are evenly distributed along the circumference of the circular end plate 3. Specifically, the positioning portion 32 is a fan-shaped body extending outward from the inner side surface of the end plate body 31 along its axial direction, and the four sets of fan-shaped positioning portions 32 are evenly distributed along the circumference of the circular end plate 3.

[0049] Preferably, the surface of the positioning part 32 that abuts against the annular magnet 2 is provided with a groove 33. After the end plate body 31 and the annular magnet 2 are assembled, a first receiving space is formed between them at the groove 33. The groove 33 is filled with plastic body 4 to ensure the connection strength between the annular magnet 2 and the circular end plate 3 and to prevent relative rotation between them during operation.

[0050] Preferably, the groove 33 is an arc-shaped groove arranged along the circumference, which facilitates the smooth flow of plastic during injection molding within the arc-shaped groove.

[0051] Preferably, both ends of the annular magnet 2 are provided with a first reinforcing connecting groove 23, which is arranged circumferentially along the annular magnet 2 and communicates with the inner hole of the annular magnet 2. Specifically, after the circular end plate 3 is assembled with the annular magnet 2, the first reinforcing connecting groove 23 communicates with the groove 33.

[0052] Specifically, the first reinforcing connection groove 23 is a conical groove, which extends obliquely from the end face of the annular magnet 2 to its inner wall along the axial direction of the annular magnet 2.

[0053] A first reinforcing connecting groove 23 is formed on the annular magnet 2. After the annular magnet 2 and the circular end plate 3 are assembled, the first reinforcing connecting groove 23 communicates with the groove 33. Specifically, after the annular magnet 2 and the circular end plate 3 are assembled, a second receiving space is formed at the first reinforcing connecting groove 23. The second receiving space communicates with the first receiving space, thereby increasing the volume of the receiving space between the annular magnet 2 and the end plate body 31, and thus increasing the amount of plastic filling between them, thereby further improving the connection strength and structural stability between the annular magnet 2 and the circular end plate 3.

[0054] More preferably, the conical surface is a plane or a concave curved surface.

[0055] In other embodiments, an annular groove can be formed on the end face of the annular magnet 2, and at least one channel is provided on the annular magnet 2 along the radial direction of the annular groove, the channel communicating with the annular groove and the inner hole of the annular magnet 2.

[0056] Preferably, at least one second reinforcing connection groove 21 is provided on the two end faces of the annular magnet 2 and / or the inner side of the end plate body 31, and each second reinforcing connection groove 21 is connected to the first reinforcing connection groove 23.

[0057] The second reinforcing connecting groove 21 communicates with the first reinforcing connecting groove 23, and both communicate with the groove 33 and the inner hole of the annular magnet 2. After injection molding, the injection-molded body 4 in the first reinforcing connecting groove 23 and the second reinforcing connecting groove 21 is an integral structure with the injection-molded body 4 inside the annular magnet 2, which further increases the connection strength between the annular magnet 2 and the circular end plate 3, and further prevents relative rotation between the annular magnet 2 and the circular end plate 3.

[0058] Preferably, the second reinforcing connecting groove 21 provided at both ends of the annular magnet 2 is formed within the first reinforcing connecting groove 23. Specifically, the second reinforcing connecting groove 21 is formed within the first reinforcing connecting groove 23.

[0059] Preferably, the second reinforcing connecting groove 21 extends from the end face of the annular magnet 2 along the axial direction of the annular magnet 2 to a predetermined depth.

[0060] Preferably, there are at least two second reinforcing connection grooves 21, and the at least two second reinforcing connection grooves 21 are evenly distributed along the circumference of the annular magnet 2.

[0061] Preferably, the second reinforcing connection groove 21 is a square groove. In other embodiments, the specific shape of the second reinforcing connection groove 21 is determined according to actual needs.

[0062] Preferably, the rotor shaft 1 is provided with an anti-slip groove 11. After injection molding, the plastic enters the anti-slip groove 11 to prevent relative displacement of the rotor shaft 1 and relative rotation of the plastic body 4 in the axial direction and in the circumferential direction.

[0063] Preferably, the anti-slip groove 11 is a circumferential spiral groove 33 along the rotor shaft 1.

[0064] Preferably, the anti-slip groove 11 includes a first spiral groove and a second spiral groove, and the spiral directions of the first spiral groove and the second spiral groove are opposite.

[0065] Preferably, the first helical groove and the second helical groove are arranged 360° along the circumference of the rotor shaft 1. Alternatively, the first helical groove and the second helical groove are arranged within a predetermined arc length along the circumference of the rotor shaft 1.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor structure for a pump, characterized in that, include: Rotor shaft (1); An annular magnet (2) has an inner hole along its axial direction, and the annular magnet (2) is coaxially sleeved on the rotor shaft (1); A circular end plate (3) is disposed at both ends of the annular magnet (2). The circular end plate (3) includes an end plate body (31) and a positioning part (32) disposed on one side of the end plate body (31) and extending along the axial direction of the annular magnet (2). The positioning part (32) is inserted into the inner hole of the annular magnet (2) and presses against the inner wall of the annular magnet (2) so that the circular end plate (3) and the annular magnet (2) are coaxially fixed.

2. The pump rotor structure according to claim 1, characterized in that, The surface on which the positioning part (32) presses against the annular magnet (2) is an arc surface, and the arc surface transitions into the inner hole of the annular magnet (2).

3. The pump rotor structure according to claim 1, characterized in that, The positioning part (32) has a groove (33) on the surface that abuts against the annular magnet (2).

4. The pump rotor structure according to claim 2, characterized in that, The positioning part (32) is a fan-shaped body that extends outward along the axial direction from the inner side of the end plate body (31).

5. The pump rotor structure according to claim 3, characterized in that, The groove (33) is an arc-shaped groove set along the circumferential direction.

6. The pump rotor structure according to claim 4, characterized in that, The annular magnet (2) has a first reinforcing connection groove (23) at both ends. The first reinforcing connection groove (23) is arranged in a ring around the annular magnet (2) and is connected to the inner hole of the annular magnet (2).

7. The pump rotor structure according to claim 6, characterized in that, At least one second reinforcing connection groove (21) is provided on the inner side of the two end faces and / or the end plate body (31) of the annular magnet (2), and each second reinforcing connection groove (21) is connected to the first reinforcing connection groove (23).

8. The pump rotor structure according to claim 7, characterized in that, The second reinforcing connecting groove (21) extends from the end face of the annular magnet (2) along the axial direction of the annular magnet (2) to a predetermined depth.

9. The pump rotor structure according to any one of claims 1-8, characterized in that, The pump rotor structure also includes a plastic body (4), the space between the annular magnet (2) and the circular end plate (3) is filled with the plastic body (4), and the annular magnet (2) and the circular end plate (3) are both covered with the plastic body (4).

10. A pump, characterized in that, The pump rotor structure includes any one of claims 1-9.

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