Water pump stator structure

Abstract

The utility model provides a water pump stator structure, which relates to the field of water pump motors, and comprises an iron core, a winding and an insulating frame which are coaxially arranged, the peripheral surface of the iron core is provided with a plurality of axially extending spiral heat dissipation grooves, and a stepped sealing groove is formed between the iron core and a shell. According to the design, a unique collaborative heat dissipation mechanism is formed through the iron core spiral heat dissipation grooves and the stepped sealing grooves. The stepped sealing grooves change the flowing path of hot air in the motor, so that the hot air flows to the spiral heat dissipation grooves more orderly, the air convection intensity in the spiral heat dissipation grooves is enhanced, the overall heat dissipation effect is further improved, the operation temperature of the stator is effectively reduced, and the stability of the motor in high-load operation is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of water pump motor technology, and in particular to a water pump stator structure. Background Technology

[0002] In modern industry and daily life, water pumps, as a crucial fluid transport device, are widely used in many fields such as agricultural irrigation, industrial production, building water supply and drainage, and domestic water use. One of the core components of a water pump is the stator, whose performance directly affects the overall operating efficiency and stability of the pump.

[0003] Currently, with the increasing demand for miniaturized and high-power-density water pumps, the winding design of water pump stators is becoming increasingly dense. While this dense winding improves power output to some extent, it also causes serious problems. Due to the limited space between the windings, heat is difficult to dissipate effectively, resulting in an extremely rapid temperature rise in the stator during pump operation. Excessive temperature not only increases the winding resistance, further exacerbating energy loss, but also has a highly detrimental effect on the insulation material surrounding the windings. Prolonged exposure to high temperatures causes the insulation material to gradually deteriorate, reducing its insulation performance and significantly shortening its lifespan. Once the insulation material fails, it can lead to short circuits and other malfunctions, causing the water pump to malfunction and potentially damaging the entire system, resulting in high maintenance costs and production downtime. Therefore, a new water pump stator structure is proposed. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by employing a unique synergistic heat dissipation mechanism formed by the spiral heat dissipation grooves in the iron core and the stepped sealing grooves. The stepped sealing grooves alter the flow path of hot air inside the motor, directing it more orderly towards the spiral heat dissipation grooves. This enhances the air convection intensity within the spiral heat dissipation grooves, further improving the overall heat dissipation effect, effectively reducing the stator's operating temperature, and ensuring the motor's stability under high load operation.

[0005] To solve the above-mentioned technical problems, this utility model solves the problem of poor heat dissipation and reduced service life of insulation materials caused by dense windings in the existing water pump stator structure through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water pump stator structure includes a coaxially arranged iron core, windings and an insulating frame. The outer circumferential surface of the iron core is provided with multiple axially extending spiral heat dissipation grooves, and a stepped sealing groove is formed between the iron core and the housing.

[0008] Preferably, the yoke of the iron core is provided with an annular heat-conducting structure, the axial length of which is equal to the thickness of the yoke of the iron core.

[0009] Preferably, the stepped sealing groove includes an upper sealing groove and a lower sealing groove, which are respectively formed on the axial end faces of the iron core.

[0010] Preferably, the depth and width of the lower sealing groove are both greater than those of the upper sealing groove.

[0011] Preferably, the outer peripheral surface of the iron core yoke is provided with an annular embedding groove, and the heat-conducting structure is interference-fitted into the embedding groove.

[0012] Preferably, the heat-conducting structure is fixed in the embedding groove by vacuum brazing, and the brazing layer thickness is 0.1-0.3mm.

[0013] Preferably, the spiral angle of the spiral heat dissipation groove is 15°-25°, and the groove depth is 20% to 30% of the iron core thickness.

[0014] Preferably, the spiral heat dissipation groove has a rounded corner at its edge.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The water pump stator structure provided in this application utilizes a unique synergistic heat dissipation mechanism formed by the spiral heat dissipation grooves in the iron core and the stepped sealing grooves. The stepped sealing grooves alter the flow path of hot air inside the motor, directing it more orderly towards the spiral heat dissipation grooves, enhancing the air convection intensity within the spiral heat dissipation grooves, further improving the overall heat dissipation effect, effectively reducing the stator's operating temperature, and ensuring the motor's stability under high load operation.

[0017] This application's stepped sealing groove consists of an upper sealing groove and a lower sealing groove, located at both axial end faces of the iron core, with the lower sealing groove having a greater depth and width than the upper sealing groove. After installing a sealing element (such as a sealing ring) within the sealing groove, it fits tightly with the housing, forming a tight sealing structure. This effectively prevents external moisture, dust, and other impurities from entering the motor, providing reliable protection for the windings and iron core. It avoids insulation degradation, short circuits, and other faults caused by impurities, thus extending the motor's service life.

[0018] The annular heat-conducting structure embedded in the iron core yoke of this application, with its excellent thermal conductivity, can quickly conduct the heat generated in the iron core yoke away, greatly improving the heat transfer efficiency, accelerating the overall heat dissipation process, and effectively reducing the temperature accumulation inside the iron core. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the disassembled structure of the iron core of this utility model;

[0023] Figure 4 This utility model Figure 3 A partial structural diagram;

[0024] Figure 5 This is a front view cross-sectional structural diagram of the iron core of this utility model;

[0025] Figure 6 This is a front view structural diagram of the iron core of this utility model.

[0026] Drawing number explanation: 1. Iron core; 2. Winding; 3. Insulating frame; 4. Spiral heat dissipation groove; 5. Stepped sealing groove; 501. Upper sealing groove; 502. Lower sealing groove; 6. Heat-conducting structure; 601. Embedded groove. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0030] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0031] Please see Figure 1-6 A water pump stator structure includes a coaxially arranged iron core 1, winding 2 and insulating frame 3. Multiple axially extending spiral heat dissipation grooves 4 are provided on the outer circumferential surface of the iron core 1, and a stepped sealing groove 5 is formed between the iron core 1 and the housing.

[0032] The water pump stator structure of this application is mainly composed of components such as iron core 1, winding 2, insulation frame 3, spiral heat dissipation groove 4 and sealing groove 5. The following is a detailed description of the structure and working principle.

[0033] Detailed structure and connection method of each component

[0034] Component assembly:

[0035] The iron core 1, as the basic component of the stator, has axially extending spiral heat dissipation grooves 4 machined on its outer circumferential surface. To ensure efficient heat dissipation, there are no fewer than four spiral heat dissipation grooves 4, which are evenly distributed on the outer circumferential surface of the iron core 1. The spiral angle is controlled between 15° and 25°, and the groove depth is 20% to 30% of the thickness of the iron core 1. The groove edges are rounded to reduce stress concentration. An annular embedding groove 601 is opened on the outer circumferential surface of the yoke of the iron core 1. The annular heat-conducting structure 6 is installed in the embedding groove 601 by interference fit, and then fixed by vacuum brazing. The brazing layer thickness is 0.1-0.3 mm to ensure that the heat-conducting structure 6 is tightly connected to the iron core 1, and its axial length is equal to the thickness of the yoke of the iron core 1.

[0036] The stepped sealing groove 5 includes an upper sealing groove 501 and a lower sealing groove 502, which are respectively formed on the axial end faces of the iron core 1, and the depth and width of the lower sealing groove 502 are both greater than those of the upper sealing groove 501. During assembly, sealing elements such as sealing rings can be set in the sealing groove to cooperate with the shell to achieve sealing.

[0037] Winding 2 is wound onto insulating frame 3, and then the assembled winding 2 and insulating frame 3 are fitted onto iron core 1.

[0038] Overall Assembly: The assembled stator core assembly, including the core 1, windings 2, insulation frame 3, and related sealing and heat-conducting components, is installed into the water pump motor housing. The stepped sealing groove 5 provides a sealed connection with the housing, ensuring the motor's internal airtightness and preventing external impurities and moisture from entering and affecting motor performance. Simultaneously, multiple spiral heat dissipation grooves 4 create a more extensive open convection structure with the external environment, providing more favorable conditions for heat dissipation.

[0039] II. Working Principle

[0040] When the water pump motor is running, the winding 2 generates heat due to energization, and the iron core 1 also generates heat due to electromagnetic losses. Part of the heat is conducted through the iron core 1 itself. Since the yoke of the iron core 1 is embedded with a ring-shaped heat-conducting structure 6, which has good thermal conductivity, it can quickly conduct the heat from the yoke of the iron core 1 away, expand the heat dissipation area, and accelerate heat dissipation.

[0041] The spiral heat dissipation grooves 4 on the outer circumference of the iron core 1 promote airflow and form air convection channels. The airflow generated during motor operation or external natural wind flows within the spiral heat dissipation grooves 4, carrying away heat from the surface of the iron core 1, achieving forced air cooling. The special angle and depth design of the spiral heat dissipation grooves 4 effectively guides airflow and improves heat dissipation efficiency.

[0042] The spiral heat dissipation groove 4 and the stepped sealing groove 5 form a synergistic heat dissipation mechanism during this process. Although the stepped sealing groove 5 is mainly used for sealing, its special structural design changes the airflow path inside the motor during operation. When the air temperature inside the motor rises due to the heat generated by the winding 2, the hot air, guided by the structure of the stepped sealing groove 5, flows more orderly towards the spiral heat dissipation groove 4, enhancing the air convection intensity within the spiral heat dissipation groove 4. In this way, the spiral heat dissipation groove 4 can more efficiently carry heat out of the motor, further improving the overall heat dissipation effect and effectively reducing the stator temperature.

[0043] The iron core 1 is sealed to the housing through a stepped sealing groove 5. The sealing elements in the upper sealing groove 501 and the lower sealing groove 502 fit tightly to the housing. The lower sealing groove 502, due to its greater depth and width, provides a better sealing effect, preventing external moisture, dust and other impurities from entering the motor, protecting the winding 2 and the iron core 1, avoiding faults such as decreased insulation performance and short circuits caused by impurities, and ensuring stable and reliable operation of the motor.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A water pump stator structure, characterized in that, It includes a coaxially arranged iron core (1), winding (2) and insulating frame (3). The outer circumferential surface of the iron core (1) is provided with multiple axially extending spiral heat dissipation grooves (4). A stepped sealing groove (5) is formed between the iron core (1) and the shell.

2. The water pump stator structure according to claim 1, characterized in that: The yoke of the iron core (1) is provided with an annular heat-conducting structure (6), the axial length of which is equal to the thickness of the yoke of the iron core.

3. The water pump stator structure according to claim 2, characterized in that: The stepped sealing groove (5) includes an upper sealing groove (501) and a lower sealing groove (502), which are respectively formed on the axial end faces of the iron core (1).

4. The water pump stator structure according to claim 3, characterized in that: The depth and width of the lower sealing groove (502) are both greater than those of the upper sealing groove (501).

5. A water pump stator structure according to claim 2, characterized in that: The outer circumferential surface of the yoke of the iron core (1) is provided with an annular embedded groove (601), and the heat-conducting structure (6) is installed in the embedded groove (601) with an interference fit.

6. A water pump stator structure according to claim 5, characterized in that: The heat-conducting structure (6) is fixed in the embedding groove (601) by vacuum brazing process, and the brazing layer thickness is 0.1-0.3mm.

7. A water pump stator structure according to claim 1, characterized in that: The spiral heat dissipation groove (4) has a spiral angle of 15°-25° and a groove depth of 20% to 30% of the thickness of the iron core (1).

8. A water pump stator structure according to claim 1, characterized in that: The spiral heat dissipation groove (4) has a rounded corner at the edge of the groove opening.

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