Rotor assembly and electronic water pump with same

Abstract

The utility model relates to the technical field of automobile electronic water pumps, and discloses a rotor assembly and an electronic water pump with the same. The rotor assembly is applied to the electronic water pump, is used for generating an excitation effect with a stator assembly to rotate, and comprises a rotor pre-wrapping assembly and an impeller assembly, the rotor pre-wrapping assembly comprises a pre-wrapping shell, and the pre-wrapping shell is fixedly connected with the impeller assembly; the electronic water pump comprises a machine shell and a rotating shaft fixed in the machine shell and further comprises the rotor assembly, and the rotor pre-wrapping assembly and the impeller assembly in the rotor assembly are in clearance fit with the rotating shaft through bearings respectively. The utility model has the technical effects that the rotor assembly and the electronic water pump are platformized, the consumption of bearing materials is reduced, and the air gap of the motor can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronic water pumps, in particular to a rotor assembly and an electronic water pump having the same. Background Art

[0002] New energy vehicles, RVs and other special vehicles often use micro water pumps as water circulation, cooling or on-board water supply systems. This type of micro self-priming water pump is collectively referred to as an automotive electronic water pump.

[0003] The automotive electronic water pump in the current technology generally consists of the following components: a housing as the working space, in which the motor component and the impeller component are integrated, the motor component is used to provide power to the impeller component, and the water body is pressurized by the action of the impeller component. The motor component specifically includes a stator component, a rotor component and a rotating shaft, wherein the rotor component can rotate in response to the magnetic field between the stator component and the rotor component, and the impeller component is driven by the rotor component to rotate to realize the operation of the impeller component, and the rotating shaft is used to guide the movement of the rotor component.

[0004] In order to achieve rotation consistency and reduce kinetic energy loss, the rotor assembly in the prior art usually integrates the impeller assembly into an integrated structure, that is, the pre-packaged shell in the rotor assembly and the impeller assembly are integrally injection molded, which results in a large amount of bearing material being used when connecting the rotor assembly to the rotating shaft. In addition, since the impeller needs to be molded according to different fluids, the rotor assembly and the electronic water pump are not easy to be platformized. Utility Model Content

[0005] Based on the above defects, the utility model proposes to design the pre-packaged shell and the impeller assembly in the rotor assembly as a split structure, so that when used on different water pumps, the rotor assembly can be used as a universal part, and only the impeller assembly needs to be molded. This is conducive to the platformization of the rotor assembly and the electronic water pump, reduces the amount of bearing material used, and can effectively reduce the air gap of the motor.

[0006] Based on this, the utility model provides a rotor assembly and an electronic water pump having the same, so as to realize the technical concept.

[0007] Specifically, a rotor assembly is used in an electronic water pump to generate excitation with a stator assembly to rotate, and includes a rotor pre-pack assembly and an impeller assembly;

[0008] The difference from the traditional structure is:

[0009] The rotor pre-package assembly includes a pre-package shell, which is fixedly connected to the impeller assembly, so that the pre-package shell and other structures of the rotor pre-package assembly can be designed as universal parts. When it needs to be applied to different electronic water pumps, only the impeller assembly needs to be redesigned and molded, which is easy to platformize;

[0010] In addition, the pre-package shell is made of metal material. Different from the 1mm thickness of plastic injection molding in traditional structures, the thickness of the pre-package shell prepared by this technology is 0.2-0.6mm, which can effectively reduce the air gap of the motor, thereby improving the efficiency of the motor and water pump by more than 5%.

[0011] Preferably, the impeller assembly includes a lower impeller, and the lower impeller and the pre-package shell are axially and radially positioned by protrusions and grooves provided on both.

[0012] Preferably, the impeller assembly includes an upper impeller, and the upper impeller is fixedly connected to the lower impeller.

[0013] Preferably, the rotor pre-package assembly also includes an iron core, a plurality of magnets and an isolation sleeve. The plurality of magnets are arranged around the iron core along the circumference of the iron core. The magnets and the iron core are both installed in the pre-package shell and wrapped by the isolation sleeve.

[0014] In addition, the utility model also provides an electronic water pump, which includes a housing and a rotating shaft fixed in the housing, and also includes the aforementioned rotor assembly, in which the rotor pre-package assembly and the impeller assembly in the rotor assembly are respectively matched with the rotating shaft clearance through bearings, that is, two smaller bearings are used to make the rotor assembly and the rotating shaft clearance match, thereby reducing the amount of bearing material used.

[0015] Preferably, the electronic water pump further comprises a stator assembly, so that the rotor pre-enclosed assembly can rotate in response to the magnetic field between the stator assembly and the rotor pre-enclosed assembly, and drive the impeller assembly to rotate to increase the pressure of the water body.

[0016] Preferably, the electronic water pump further comprises a waterproof sleeve, which is used to isolate the stator assembly from the rotor assembly to prevent water from contacting the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 It is a cross-sectional view of an electronic water pump in an embodiment of the utility model;

[0019] Figure 2 is an exploded view of a rotor assembly in an embodiment of the utility model;

[0020] In the figure:

[0021] A rotor pre-packing assembly 1, a pre-packing shell 11, a groove 111, an iron core 12, a magnetic steel 13, and an isolation sleeve 14;

[0022] Impeller assembly 2, lower impeller 21, protrusion 211, upper impeller 22;

[0023] Housing 3;

[0024] Rotating shaft 4;

[0025] First bearing 5;

[0026] Second bearing 6;

[0027] Stator assembly 7;

[0028] Waterproof sleeve 8. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment: This embodiment provides a best implementation scheme of an electronic water pump, which includes a rotor assembly.

[0031] Specifically, Figure 1 The electronic water pump includes a housing 3 and a rotating shaft 4 fixed in the housing 3, and also includes a rotor assembly, such as Figure 2 The rotor assembly includes a rotor pre-package assembly 1 and an impeller assembly 2. The rotor pre-package assembly 1 includes a pre-package shell 11. The pre-package shell 11 is fixedly connected to the impeller assembly 2.

[0032] In this embodiment, the pre-package housing 11 follows the structure of a conventional electronic water pump, the only difference being that the pre-package housing 11 is not integrally injection molded with the impeller assembly 2 .

[0033] Further, such as Figure 2 The impeller assembly 2 includes a lower impeller 21. The lower impeller 21 and the pre-package shell 11 are axially and radially positioned by protrusions 211 and grooves 111 arranged on the two. In this embodiment, there are two grooves 111, which are arranged at the end of the pre-package shell 11 and distributed along the circumference of the pre-package shell 11. There are also two corresponding buckles, which are protruding from the lower impeller 21 and distributed along the circumference of the lower impeller 21. The depth of the groove 111 or the protrusion 211 is 0.3-2mm.

[0034] Further, such as Figure 2 The impeller assembly 2 includes an upper impeller 22, which is fixedly connected to a lower impeller 21. In the present embodiment, the upper impeller 22 and the lower impeller 21 are fixedly matched by an annular protrusion on the lower impeller 21 and an annular groove 111 on the upper impeller 22.

[0035] Further, such as Figure 2 The rotor pre-package assembly 1 also includes an iron core 12, a plurality of magnetic steels 13 and an isolation sleeve 14. The plurality of magnetic steels 13 are arranged around the iron core 12 along the circumference of the iron core 12. The magnetic steels 13 and the iron core 12 are both installed in the pre-package shell 11 and wrapped by the isolation sleeve 14. There are 4 to 6 magnetic steels 13.

[0036] Further, such as Figures 1-2 The rotor pre-package assembly 1 and the impeller assembly 2 in the rotor assembly are respectively connected to the rotating shaft 4 through bearings. Specifically, the pre-package shell 11 and the rotating shaft 4 are connected through a first bearing 5, and the lower impeller 21 and the rotating shaft 4 are connected through a second bearing 6.

[0037] Further, such as Figure 1 The electronic water pump also includes a stator assembly 7. The stator assembly 7 uses a traditional structure, so that the rotor pre-package assembly 1 can rotate in response to the magnetic field between the stator assembly 7 and the rotor pre-package assembly 1, and drive the impeller assembly 2 to rotate to increase the pressure of the water body.

[0038] Further, such as Figure 1 The electronic water pump also includes a waterproof sleeve 8, which is used to isolate the stator assembly 7 from the rotor assembly to prevent water from contacting the stator assembly 7.

[0039] 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.

[0040] 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 by 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. A rotor assembly, which is used in an electronic water pump to generate excitation with a stator assembly to rotate, and includes a rotor pre-package assembly and an impeller assembly, and is characterized in that: The rotor pre-packing assembly includes a pre-packing shell, and the pre-packing shell is fixedly connected to the impeller assembly; The impeller assembly includes a lower impeller, and the lower impeller and the pre-package shell are axially and radially positioned by protrusions and grooves provided on both of them; The impeller assembly includes an upper impeller, and the upper impeller is fixedly connected to the lower impeller.

2. A rotor assembly according to claim 1, characterized in that: The rotor pre-package assembly also includes an iron core, a plurality of magnetic steels and an isolation sleeve. The plurality of magnetic steels are arranged around the iron core along the circumference of the iron core. The magnetic steels and the iron core are both installed in the pre-package shell and wrapped by the isolation sleeve.

3. An electronic water pump, comprising a housing and a rotating shaft fixed in the housing, characterized in that: The electronic water pump further comprises a rotor assembly as claimed in any one of claims 1 to 2, wherein the rotor pre-pack assembly and the impeller assembly in the rotor assembly are respectively matched with the rotating shaft through bearing clearance.

4. An electronic water pump according to claim 3, characterized in that: It also includes a stator assembly, which enables the rotor pre-enclosed assembly to rotate in response to the magnetic field between the stator assembly and the rotor pre-enclosed assembly, and drives the impeller assembly to rotate to increase the pressure of the water body.

5. An electronic water pump according to claim 4, characterized in that: It also includes a waterproof sleeve, which is used to isolate the stator assembly from the rotor assembly to prevent water from contacting the stator assembly.

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