Electronic water pump rotor with magnetic steel skewed poles

Abstract

The utility model discloses an electronic water pump rotor with magnetic steel skewed poles, which belongs to the technical field of electronic water pumps and comprises an impeller, a plastic-coated body component and a rotor steel sleeve, the impeller is fixedly connected with the plastic-coated body component, the impeller is communicated with the plastic-coated body component, and the rotor steel sleeve is fixedly connected with the plastic-coated body component. The rotor steel sleeve is located on the outer side of the plastic-coated body assembly, the impeller is located above the plastic-coated body assembly, the impeller and the plastic-coated body assembly are connected in a fastening mode and communicate with each other, it is ensured that water flow can smoothly pass through, and the rotor steel sleeve is fastened to the outer side of the plastic-coated body assembly, provides additional mechanical protection for the rotor and participates in forming a magnetic field closed path. The motor drives the impeller to rotate, water flows through the power action of the impeller, meanwhile, the magnetic field distribution is optimized through the configuration of the magnetic steel skewed poles, the torque fluctuation of the motor is reduced, and therefore vibration and noise are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to an electronic water pump rotor with oblique magnetic poles. Background Art

[0002] Electronic water pumps are an indispensable component in automotive thermal management systems, especially in the field of new energy vehicles and high-performance electric vehicles, where their role becomes increasingly prominent. Electronic water pumps use motor drive to replace traditional mechanical drive water pumps to achieve higher energy efficiency and control accuracy. As the automotive industry's requirements for energy efficiency and environmental protection increase, the demand for electronic water pumps is expected to continue to grow. In addition, with the advancement of technology, the design and materials of electronic water pumps are also being optimized to meet more stringent operating conditions and performance standards.

[0003] Currently, existing electronic water pump technologies mainly focus on improving the energy efficiency and response speed of the pump. Common designs include using high-efficiency brushless DC motors to reduce fluid power losses through impellers, thereby improving flow and pressure efficiency.

[0004] Regarding the relevant technologies mentioned above, although the existing technologies have been optimized in many aspects, there is still room for improvement in noise, vibration and harshness (NVH) performance. In high-demand automotive applications, such as luxury cars and electric vehicles, NVH control is particularly important to ensure passenger comfort. Electronic water pumps in the existing technology often generate large noise and vibration when running at high speed, which is mainly caused by uneven magnetic field distribution and unstable torque output. In addition, existing water pump designs often do not fully consider further reducing these unfavorable factors through structural optimization, such as the configuration of magnetic steel and the optimization of the bearing system, the uniformity of the magnetic field and the operating efficiency of the motor are insufficient, which makes the electronic water pump generate noise and self-stability when running at high speed. Therefore, technical personnel in this field provide an electronic water pump rotor with oblique magnetic poles to solve the problems raised in the above background. Utility Model Content

[0005] The utility model aims to provide an electronic water pump rotor with oblique magnetic poles to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A magnetic steel oblique pole electronic water pump rotor comprises an impeller, a plastic-encased body component and a rotor steel sleeve. The impeller and the plastic-encased body component are tightly connected, the impeller and the plastic-encased body component are communicated, the rotor steel sleeve and the plastic-encased body component are tightly connected, the rotor steel sleeve is located outside the plastic-encased body component, and the impeller is located above the plastic-encased body component.

[0008] By adopting the above technical solution, the impeller and the plastic-encased assembly are connected by fastening and are interconnected to ensure that water can flow smoothly. The rotor steel sleeve is fastened to the outside of the plastic-encased assembly to provide additional mechanical protection for the rotor and participate in forming a closed magnetic field path. When working, the motor drives the impeller to rotate, and the water flows through the power of the impeller. At the same time, the configuration of the oblique poles of the magnetic steel optimizes the magnetic field distribution and reduces the torque fluctuation of the motor, thereby effectively reducing vibration and noise and improving the overall NVH performance of the electronic water pump. This structure not only ensures the efficient operation of the water pump, but also improves its durability and reliability, and is suitable for automotive thermal management systems with high NVH requirements.

[0009] Furthermore, the plastic-coated body assembly includes a rotor plastic-coated body, a magnetic steel frame, a segmented magnetic steel, a rotor core and a graphite bearing. The rotor plastic-coated body and the rotor steel sleeve are tightly connected, the magnetic steel frame and the segmented magnetic steel are tightly connected, the magnetic steel frame and the rotor plastic-coated body are tightly connected, the rotor core and the rotor plastic-coated body are tightly connected, the graphite bearing and the rotor plastic-coated body are tightly connected, the graphite bearing and the impeller are connected, the impeller and the rotor plastic-coated body are tightly connected, the impeller and the rotor plastic-coated body are connected, the rotor plastic-coated body and the graphite bearing are connected, the rotor core is located in the rotor plastic-coated body, the segmented magnetic steel is located in the magnetic steel frame, and the magnetic steel frame is located in the rotor plastic-coated body.

[0010] By adopting the above technical solution, the plastic-coated body assembly is composed of a rotor plastic-coated body, a magnetic steel frame, a segmented magnetic steel, a rotor core and a graphite bearing. The rotor core is fixed inside the rotor plastic-coated body to provide the main structure of the magnetic circuit. The segmented magnetic steel is embedded in the magnetic steel frame and connected to the rotor plastic-coated body by fastening. This segmented design allows the magnetic field to be more evenly distributed around the rotor, thereby reducing the fluctuation of the magnetic field and the torque pulse of the motor. The graphite bearing is fixed to the rotor plastic-coated body and is fastened to the impeller to ensure the smooth rotation and good mechanical alignment of the impeller. This design enables the electronic water pump to effectively convert electric energy into mechanical energy during operation through precise component configuration and fixation, driving the impeller to efficiently push the fluid. At the same time, the noise and vibration are reduced by optimizing the magnetic circuit design, and the overall performance and durability of the electronic water pump are improved. This high-efficiency and low-noise electronic water pump is particularly suitable for use in automotive thermal management systems with strict requirements on NVH performance.

[0011] Furthermore, the graphite bearing includes a graphite upper bearing and a graphite lower bearing, the graphite upper bearing is tightly connected to the impeller, the graphite upper bearing is located in the impeller, the graphite lower bearing is tightly connected to the rotor plastic body, the graphite lower bearing is located in the rotor plastic body, an upper shaft cavity is provided on the graphite upper bearing, a lower shaft cavity is provided on the graphite lower bearing, the upper shaft cavity is communicated with the impeller, and the lower shaft cavity is communicated with the rotor plastic body.

[0012] By adopting the above technical solution, the graphite bearing is divided into a graphite upper bearing and a graphite lower bearing to provide strong and reliable support and shock absorption functions. The graphite upper bearing is installed inside the impeller and tightly connected to it, while the graphite lower bearing is fixed inside the rotor plastic package. This layout allows the upper and lower ends of the graphite bearing to form independent upper and lower shaft cavities, which are connected to the impeller and the rotor plastic package respectively, ensuring that the lubrication and cooling media can flow effectively, thereby reducing friction and wear. The working principle of this design is based on optimizing the fluid dynamics performance by precisely controlling the rotation of the impeller. At the same time, the structure of the graphite bearing ensures the smooth operation of the rotor system, reduces vibration and noise, and ultimately achieves the effect of improving the efficiency of the entire water pump system and extending its service life.

[0013] Furthermore, a wheel shaft cavity is provided on the impeller, the graphite upper bearing is located in the wheel shaft cavity, the upper shaft cavity is connected to the wheel shaft cavity, a rotor shaft cavity is provided on the rotor plastic package, the graphite lower bearing is located in the rotor shaft cavity, the lower shaft cavity is connected to the rotor shaft cavity, and the wheel shaft cavity is connected to the rotor shaft cavity.

[0014] By adopting the above technical solution, the impeller has a special wheel shaft cavity in which a graphite upper bearing is installed, and the rotor plastic body has a rotor shaft cavity in which a graphite lower bearing is installed. This structure connects the upper shaft cavity with the wheel shaft cavity, and the lower shaft cavity with the rotor shaft cavity. There is a direct connection between the wheel shaft cavity and the rotor shaft cavity, allowing liquid or lubricating materials to flow freely in these cavities, thereby ensuring effective lubrication and heat dissipation of the bearings and reducing wear. This design not only optimizes the lubrication system and improves the durability of the impeller and bearings, but also effectively improves the overall efficiency and reliability of the electronic water pump by reducing friction and wear. In addition, this interconnected structure also helps to keep the bearings cool, further reduce the thermal load during operation, and improve the stability and efficiency of the system.

[0015] Furthermore, a magnetic steel slot is provided on the magnetic steel frame, the segmented magnetic steel is located in the magnetic steel slot, the segmented magnetic steel and the magnetic steel slot are tightly connected, and a protrusion is provided on the magnetic steel frame, and the protrusion is tightly connected to the rotor plastic package.

[0016] By adopting the above technical solution, the magnetic steel frame is provided with magnetic steel slots for accurately placing and fixing segmented magnetic steels. These segmented magnetic steels are fastened in the magnetic steel slots to ensure the uniform distribution of the magnetic field and the maximization of the magnetic force. In addition, the magnetic steel frame is also designed with raised parts, which are fastened to the rotor plastic body to enhance the stability and durability of the entire rotor structure. This design reduces the torque fluctuation of the motor by optimizing the magnetic field configuration, thereby effectively reducing vibration and noise, and improving the overall NVH performance of the water pump. Through this magnetic steel configuration and structural fixing method, the efficiency and life of the electronic water pump are improved.

[0017] Furthermore, the segmented magnetic steel includes an upper magnetic steel and a lower magnetic steel, the upper magnetic steel is located in the magnetic steel groove, the upper magnetic steel and the magnetic steel groove are tightly connected, the lower magnetic steel is located in the magnetic steel groove, the lower magnetic steel and the magnetic steel groove are tightly connected, and the upper magnetic steel and the lower magnetic steel are arranged in an alternating manner.

[0018] By adopting the above technical solution, the segmented magnetic steel is subdivided into upper magnetic steel and lower magnetic steel. These two parts are precisely placed in the magnetic steel slot of the magnetic steel skeleton and are tightly connected to the magnetic steel slot. The upper magnetic steel and the lower magnetic steel are arranged in an oblique pole manner. This unique staggered arrangement helps to optimize the magnetic field distribution and reduce interference between magnetic fields, thereby achieving smoother torque output and reducing torque fluctuations and vibrations of the motor. This implementation method effectively improves the operating efficiency and NVH (noise, vibration and roughness) performance of the electronic water pump. Through the oblique pole design, the electronic water pump can maintain a low noise level and high stability when running at high speed.

[0019] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the segmented magnetic steel is subdivided into upper magnetic steel and lower magnetic steel, both parts are precisely placed in the magnetic steel slot of the magnetic steel skeleton and are tightly connected to the magnetic steel slot. The upper magnetic steel and the lower magnetic steel are arranged in an oblique pole manner. This unique staggered arrangement helps to optimize the magnetic field distribution and reduce interference between magnetic fields, thereby achieving smoother torque output and reducing torque fluctuations and vibrations of the motor. This implementation method effectively improves the operating efficiency and NVH (noise, vibration and roughness) performance of the electronic water pump. Through the oblique pole design, the electronic water pump can maintain a low noise level and high stability when running at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is an exploded view of the overall structure of the utility model;

[0023] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the upper shaft cavity, the lower peripheral cavity, the rotor shaft cavity and the wheel shaft cavity of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of segmented magnetic steel, protrusions and magnetic steel grooves of the utility model.

[0026] In the figure: 1. impeller; 11. wheel shaft cavity; 2. plastic-coated body assembly; 21. rotor plastic-coated body; 211. rotor shaft cavity; 22. magnetic steel skeleton; 221. magnetic steel groove; 222. protrusion; 23. segmented magnetic steel; 231. upper magnetic steel; 232. lower magnetic steel; 24. rotor core; 25. graphite bearing; 251. upper graphite bearing; 2511. upper shaft cavity; 252. lower graphite bearing; 2521. lower shaft cavity; 3. rotor steel sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 , the utility model provides a technical solution:

[0029] An electronic water pump rotor with a magnetic steel oblique pole comprises an impeller 1, a plastic-encapsulated body component 2 and a rotor steel sleeve 3. The impeller 1 and the plastic-encapsulated body component 2 are tightly connected, the impeller 1 and the plastic-encapsulated body component 2 are communicated, the rotor steel sleeve 3 and the plastic-encapsulated body component 2 are tightly connected, the rotor steel sleeve 3 is located outside the plastic-encapsulated body component 2, and the impeller 1 is located above the plastic-encapsulated body component.

[0030] By adopting the above technical solution, the impeller 1 and the plastic-encapsulated body component 2 are connected by fastening and communicate with each other to ensure that the water can flow smoothly. The rotor steel sleeve 3 is fastened to the outside of the plastic-encapsulated body component 2 to provide additional mechanical protection for the rotor and participate in forming a closed magnetic field path. When working, the motor drives the impeller 1 to rotate, and the water flows through the power of the impeller 1. At the same time, the configuration of the oblique poles of the magnetic steel optimizes the magnetic field distribution and reduces the torque fluctuation of the motor, thereby effectively reducing vibration and noise, and improving the overall NVH performance of the electronic water pump. This structure not only ensures the efficient operation of the water pump, but also improves its durability and reliability, and is suitable for automotive thermal management systems with high NVH requirements.

[0031] Further, the plastic-encapsulated body assembly 2 includes a rotor plastic-encapsulated body 21, a magnetic steel skeleton 22, a segmented magnetic steel 23, a rotor core 24 and a graphite bearing 25. The rotor plastic-encapsulated body 21 is fastened to the rotor steel sleeve 3, the magnetic steel skeleton 22 is fastened to the segmented magnetic steel 23, the magnetic steel skeleton 22 is fastened to the rotor plastic-encapsulated body 21, the rotor core 24 is fastened to the rotor plastic-encapsulated body 21, the graphite bearing 25 is fastened to the rotor plastic-encapsulated body 21, the graphite bearing 25 is fastened to the impeller 1, the graphite bearing 25 is communicated with the impeller 1, the impeller 1 is fastened to the rotor plastic-encapsulated body 21, the impeller 1 is communicated with the rotor plastic-encapsulated body 21, the rotor plastic-encapsulated body 21 is communicated with the graphite bearing 25, the rotor core 24 is located in the rotor plastic-encapsulated body 21, the segmented magnetic steel 23 is located in the magnetic steel skeleton 22, and the magnetic steel skeleton 22 is located in the rotor plastic-encapsulated body 21.

[0032] By adopting the above technical solution, the plastic package assembly 2 is composed of a rotor plastic package 21, a magnetic steel frame 22, a segmented magnetic steel 23, a rotor core 24 and a graphite bearing 25. The rotor core 24 is fixed inside the rotor plastic package 21 to provide the main structure of the magnetic circuit. The magnetic steel frame 22 is embedded with a segmented magnetic steel 23 and connected to the rotor plastic package 21 by fastening. This segmented design allows the magnetic field to be more evenly distributed around the rotor, thereby reducing the fluctuation of the magnetic field and the torque pulse of the motor. The graphite bearing 25 is fixed to the rotor plastic package 21 and is fastened to the impeller 1 to ensure the smooth rotation and good mechanical alignment of the impeller 1. This design enables the electronic water pump to effectively convert electric energy into mechanical energy during operation through precise component configuration and fixation, driving the impeller 1 to efficiently push the fluid. At the same time, by optimizing the magnetic circuit design, noise and vibration are reduced, and the overall performance and durability of the electronic water pump are improved. This high-efficiency and low-noise electronic water pump is particularly suitable for use in automotive thermal management systems with strict requirements on NVH performance.

[0033] Furthermore, the graphite bearing 25 includes a graphite upper bearing 251 and a graphite lower bearing 252. The graphite upper bearing 251 is tightly connected to the impeller 1 and is located in the impeller 1. The graphite lower bearing 252 is tightly connected to the rotor plastic body 21 and is located in the rotor plastic body 21. An upper shaft cavity 2511 is provided on the graphite upper bearing 251 and a lower shaft cavity 2521 is provided on the graphite lower bearing 252. The upper shaft cavity 2511 is communicated with the impeller 1 and the lower shaft cavity 2521 is communicated with the rotor plastic body 21.

[0034] By adopting the above technical solution, the graphite bearing 25 is divided into a graphite upper bearing 251 and a graphite lower bearing 252 to provide strong and reliable support and shock absorption functions. The graphite upper bearing 251 is installed inside the impeller 1 and is tightly connected thereto, while the graphite lower bearing 252 is fixed inside the rotor plastic package 21. This layout allows the upper and lower ends of the graphite bearing 25 to form independent upper shaft cavities 2511 and lower shaft cavities 2521, which are respectively connected to the impeller 1 and the rotor plastic package 21, ensuring that the lubrication and cooling media can flow effectively, thereby reducing friction and wear. The working principle of this design is based on optimizing the fluid dynamics performance by precisely controlling the rotation of the impeller 1. At the same time, the structure of the graphite bearing 25 ensures the smooth operation of the rotor system, reduces vibration and noise, and ultimately achieves the effect of improving the efficiency of the entire water pump system and extending its service life.

[0035] Furthermore, the impeller 1 is provided with a wheel shaft cavity 11, the graphite upper bearing 251 is located in the wheel shaft cavity 11, the upper shaft cavity 2511 is connected to the wheel shaft cavity 11, the rotor plastic body 21 is provided with a rotor shaft cavity 211, the graphite lower bearing 252 is located in the rotor shaft cavity 211, the lower shaft cavity 2521 is connected to the rotor shaft cavity 211, and the wheel shaft cavity 11 is connected to the rotor shaft cavity 211.

[0036] By adopting the above technical solution, the impeller 1 has a special wheel shaft cavity 11, in which a graphite upper bearing 251 is installed, and the rotor plastic body 21 is provided with a rotor shaft cavity 211, in which a graphite lower bearing 252 is installed. This structure enables the upper shaft cavity 2511 to be connected to the wheel shaft cavity 11, and the lower shaft cavity 2521 to be connected to the rotor shaft cavity 211, and there is a direct connection between the wheel shaft cavity 11 and the rotor shaft cavity 211, allowing liquid or lubricating materials to flow freely in these cavities, thereby ensuring effective lubrication and heat dissipation of the bearings and reducing wear. This design not only optimizes the lubrication system and improves the durability of the impeller 1 and the bearings, but also effectively improves the overall efficiency and reliability of the electronic water pump by reducing friction and wear. In addition, this interconnection structure also helps to keep the bearings cool, further reduce the thermal load during operation, and improve the stability and efficiency of the system.

[0037] Furthermore, a magnetic steel slot 221 is provided on the magnetic steel skeleton 22, and the segmented magnetic steel 23 is located in the magnetic steel slot 221. The segmented magnetic steel 23 and the magnetic steel slot 221 are fastened together. A protrusion 222 is provided on the magnetic steel skeleton 22, and the protrusion 222 and the rotor overmolded body 21 are fastened together.

[0038] By adopting the above technical solution, the magnetic steel frame 22 is provided with a magnetic steel slot 221 for accurately placing and fixing the segmented magnetic steel 23. These segmented magnetic steels 23 are fastened in the magnetic steel slot 221 to ensure the uniform distribution of the magnetic field and the maximization of the magnetic force. In addition, the magnetic steel frame 22 is also designed with a protrusion 222 part, which is fastened to the rotor plastic body 21, thereby enhancing the stability and durability of the entire rotor structure. This design reduces the torque fluctuation of the motor by optimizing the magnetic field configuration, thereby effectively reducing vibration and noise, and improving the overall NVH performance of the water pump. Through this magnetic steel configuration and structural fixing method, the efficiency and life of the electronic water pump are improved.

[0039] Furthermore, the segmented magnetic steel 23 includes an upper magnetic steel 231 and a lower magnetic steel 232, the upper magnetic steel 231 is located in the magnetic steel groove 221, the upper magnetic steel 231 and the magnetic steel groove 221 are fastened together, the lower magnetic steel 232 is located in the magnetic steel groove 221, the lower magnetic steel 232 and the magnetic steel groove 221 are fastened together, and the upper magnetic steel 231 and the lower magnetic steel 232 are arranged in an alternating manner.

[0040] The working principle of the utility model is as follows: the impeller 1 is installed at the front end of the water pump and directly contacts the water flow. The impeller 1 is connected with the graphite bearing 25 to achieve smooth rotation of the impeller. The power of the impeller 1 comes from the motor. The water flow is driven by the rotation of the impeller to achieve the basic function of the water pump. The plastic-encapsulated body component 2 serves as a fixed base for the impeller 1 and other components, providing structural support and ensuring a tight connection between the components. The rotor plastic-encapsulated body 21 in the plastic-encapsulated body component 2 is tightly connected with the impeller 1, the graphite bearing 25 and the rotor steel sleeve 3 to ensure the structural integrity and operational stability of the entire component. The rotor steel sleeve 3 surrounds the outer side of the plastic-encapsulated body component 2 to provide additional mechanical protection and participate in forming a closed magnetic field path. The presence of the rotor steel sleeve 3 helps to optimize the magnetic field distribution of the rotor and reduce electromagnetic interference. The magnetic steel skeleton 22 is built into the rotor plastic body 21 and is used to fix the segmented magnetic steel 23. The magnetic steel skeleton 22 is designed with a magnetic steel slot 221 and a protrusion 222, which not only ensures the accurate position and fixation of the magnetic steel 23, but also is fastened to the rotor plastic body 21 through the protrusion 222 to enhance the structural stability. The segmented magnetic steel 23 includes an upper magnetic steel 231 and a lower magnetic steel 232, both of which are located in the magnetic steel slot 221 and are fastened to the magnetic steel slot. The staggered arrangement of the segmented magnetic steel optimizes the magnetic field distribution, reduces the torque fluctuation of the motor, and effectively reduces vibration and noise. The rotor core 24 is located inside the rotor plastic body 21 and is the main structure of the magnetic circuit. The rotor core 24 is fastened to the rotor plastic body 21 to ensure The effective transmission of magnetic force and the magnetic properties of the entire rotor, the graphite bearing 25 includes a graphite upper bearing 251 and a graphite lower bearing 252, wherein the graphite upper bearing 251 is located inside the impeller 1 and is connected to the impeller 1 through the wheel shaft cavity 11, and the graphite lower bearing 252 is located in the rotor shaft cavity 211 of the rotor plastic package 21 and is connected thereto. The design of the graphite bearing not only ensures the smooth rotation of the impeller, but also optimizes the lubrication and cooling system through the connection design of the shaft cavity, reduces friction and wear, and improves system efficiency and life. Through the coordinated work of these components, the electronic water pump rotor can efficiently convert electrical energy into mechanical energy and drive water flow. At the same time, through the optimized magnetic circuit design and structural stability, the overall NVH performance and durability are significantly improved, which is suitable for application environments with high requirements on noise and vibration.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electronic water pump rotor with oblique magnetic poles, characterized in that: The electronic water pump rotor comprises an impeller (1), a plastic-encased body component (2) and a rotor steel sleeve (3), wherein the impeller (1) and the plastic-encased body component (2) are tightly connected, the impeller (1) and the plastic-encased body component (2) are in communication, the rotor steel sleeve (3) and the plastic-encased body component (2) are tightly connected, the rotor steel sleeve (3) is located outside the plastic-encased body component (2), and the impeller (1) is located above the plastic-encased body component (2); The plastic-encapsulated body assembly (2) comprises a rotor plastic-encapsulated body (21), a magnetic steel frame (22), a segmented magnetic steel (23), a rotor iron core (24) and a graphite bearing (25); the rotor plastic-encapsulated body (21) and the rotor steel sleeve (3) are tightly connected; the magnetic steel frame (22) and the segmented magnetic steel (23) are tightly connected; the magnetic steel frame (22) and the rotor plastic-encapsulated body (21) are tightly connected; the rotor iron core (24) and the rotor plastic-encapsulated body (21) are tightly connected; the graphite bearing (25) and the rotor plastic-encapsulated body (21) are tightly connected. The graphite bearing (25) and the impeller (1) are tightly connected, the graphite bearing (25) and the impeller (1) are in communication, the impeller (1) and the rotor plastic-encased body (21) are tightly connected, the impeller (1) and the rotor plastic-encased body (21) are in communication, the rotor plastic-encased body (21) and the graphite bearing (25) are in communication, the rotor core (24) is located in the rotor plastic-encased body (21), the segmented magnetic steel (23) is located in the magnetic steel skeleton (22), and the magnetic steel skeleton (22) is located in the rotor plastic-encased body (21); The magnetic steel frame (22) is provided with a magnetic steel slot (221), the segmented magnetic steel (23) is located in the magnetic steel slot (221), the segmented magnetic steel (23) and the magnetic steel slot (221) are tightly connected, the magnetic steel frame (22) is provided with a protrusion (222), and the protrusion (222) and the rotor plastic body (21) are tightly connected; The segmented magnetic steel (23) comprises an upper magnetic steel (231) and a lower magnetic steel (232); the upper magnetic steel (231) is located in the magnetic steel slot (221); the upper magnetic steel (231) and the magnetic steel slot (221) are tightly connected; the lower magnetic steel (232) is located in the magnetic steel slot (221); the lower magnetic steel (232) and the magnetic steel slot (221) are tightly connected; the upper magnetic steel (231) and the lower magnetic steel (232) are arranged in an alternating manner.

2. The electronic water pump rotor with skewed magnetic poles according to claim 1, characterized in that: The graphite bearing (25) comprises a graphite upper bearing (251) and a graphite lower bearing (252); the graphite upper bearing (251) is tightly connected to the impeller (1); the graphite upper bearing (251) is located in the impeller (1); the graphite lower bearing (252) is tightly connected to the rotor plastic-encased body (21); the graphite lower bearing (252) is located in the rotor plastic-encased body (21); an upper shaft cavity (2511) is provided on the graphite upper bearing (251); a lower shaft cavity (2521) is provided on the graphite lower bearing (252); the upper shaft cavity (2511) is in communication with the impeller (1); and the lower shaft cavity (2521) is in communication with the rotor plastic-encased body (21).

3. The electronic water pump rotor with skewed magnetic poles according to claim 2, characterized in that: The impeller (1) is provided with a wheel shaft cavity (11), the graphite upper bearing (251) is located in the wheel shaft cavity (11), the upper shaft cavity (2511) and the wheel shaft cavity (11) are communicated with each other, the rotor plastic package (21) is provided with a rotor shaft cavity (211), the graphite lower bearing (252) is located in the rotor shaft cavity (211), the lower shaft cavity (2521) and the rotor shaft cavity (211) are communicated with each other, and the wheel shaft cavity (11) and the rotor shaft cavity (211) are communicated with each other.

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