Axial magnetic electric pump

Abstract

The utility model discloses an axial magnetic electric pump which comprises a motor base assembly, a fixing shaft, an impeller assembly and a pump body assembly. A partition plate is axially arranged on a machine shell of the motor base assembly, a non-magnetic-conductive material is adopted to serve as a motor axial air gap, the partition plate divides the machine shell into two cavities, and a pump cavity is formed by a stator winding iron core side and a pump body side and a pump body side and a pump body flow channel side. Two ends of the fixed shaft are respectively fixed on the casing forming the pump cavity and the shaft sleeve at the axis end of the pump body; the impeller assembly serves as a rotor of the axial magnetic flux motor and rotates on the fixed shaft. By adopting the technology of the utility model, the integrated design of the leakage-free electric pump is realized, the size of the electric pump is effectively reduced, and the efficiency of the electric pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water pumps, and particularly to a new type of electric water pump without medium leakage driven by an axial-flux motor (hereinafter referred to as "electric pump"). Background Art

[0002] At present, the electric pumps with leakage-free requirements on the market drive the water pump impeller to work through a magnetic coupling on the output of the motor shaft. The magnetic coupling body is provided with inner and outer magnetic steels, and magnetic / magnetic coupling transmission realizes the transmission and isolation between the motor and the water pump. The magnetic coupling requires a large axial dimension and heat dissipation settings in terms of structure, and its structure is complex. The magnetic steel has a large moment of inertia and a high cost, and is usually used for low-power transmission.

[0003] Another leakage-free electric pump solution on the market at present is that the motor stator uses a shielding sleeve, and the rotor is filled with water for bearing lubrication and heat dissipation. Since the air gap between the stator and the rotor of the shielding sleeve motor cannot be cleaned, it can only be used in a clean water environment.

[0004] The Chinese invention patent document (CN 117345652 A) discloses "a motor-water pump integrated machine", an axial-flux motor bearing structure, a hollow shaft (fixed coil) is fixed on the stator, and a shaft sleeve (moving coil) is fixed on the rotor assembly; the fixed shaft is a single-end fixed structure, which will limit the working speed and pressure of the rotor assembly. Summary of the Invention

[0005] The purpose of the utility model is to provide an axial magnetic flux electric pump to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0006] To solve the above technical problems, the utility model provides an axial magnetic flux electric pump, which includes a motor seat assembly, a fixed shaft, an impeller assembly, and a pump body. The motor seat assembly includes a machine shell and a stator winding iron core. The feature is that: a partition is axially arranged in the machine shell of the motor seat assembly, and a non-magnetic conductive material is used as the axial air gap of the motor. The partition divides the machine shell into two cavities, which are respectively the stator winding iron core side and the pump body side. The pump body side of the machine shell and the flow channel side of the pump body form a pump cavity.

[0007] The impeller assembly serves as the rotor of the axial-flux motor. The impeller assembly rotates on the fixed shaft, and both ends of the fixed shaft are respectively fixed on the shaft sleeves at the two axial ends of the two parts, the machine shell and the pump body, which form the pump cavity.

[0008] The motor seat assembly further includes a stator pressing plate, machine seat feet, a driving plate, and a rear cover. An axial boss is designed on the stator iron core side of the machine shell to radially position and axially press the stator winding iron core, and a shaft sleeve mounting hole is arranged on the other side of the partition.

[0009] The impeller assembly includes: a permanent magnet, a back plate, a lower seat, a blade plate, and a shaft sleeve. The permanent magnet is closely attached to the inner side of the lower seat in the axial direction, and the back plate is closely attached to the other side of the permanent magnet as the rotor back plate; the lower seat and the blade plate encapsulate the permanent magnet and the back plate into a whole.

[0010] The casing is provided with an axial dovetail groove, and the machine base feet are fixed by axially arranged screws, which is convenient for assembly and has good stability.

[0011] An axial sleeve bracket is arranged on the axis of the water inlet on the side of the pump flow passage for fixing the shaft sleeve.

[0012] The beneficial effects of the present utility model are:

[0013] The structure of the present utility model makes full use of the characteristics of the planar air gap of the axial flux motor and the axial air gap magnetic field. The electric pump has a compact structure, a short axial length, and high efficiency.

[0014] The setting of the axial partition of the casing, i.e., the air gap and the two cavities, reduces the air gap length, improves the efficiency of the motor, and at the same time reduces the space on the back of the impeller of the pump body, improving the hydraulic efficiency.

[0015] Compared with the traditional magnetic coupling, the electric / magnetic coupling of the present utility model has high transmission efficiency and a simple structure, and is a new type of leak-free electric pump used in chemical and dosing applications.

[0016] The fixed shaft of the present utility model is fixedly arranged at both ends, has high stability, can withstand the high-speed operation requirements of the impeller group, and is suitable for design and use in more scenarios.

[0017] The electric pump of the present utility model has a simple structure, and the impeller and the fixed shaft are of a quick-disassembly structure. If the pump body is disassembled quickly, it meets the design requirements of scenarios with cleaning requirements.

[0018] The axial assembly and fixing method of the machine feet of the electric pump of the present utility model are convenient for installation and maintenance and meet the installation requirements of different center heights. Description of the Drawings

[0019] The following further describes the present invention with reference to the drawings and embodiments, where:

[0020] The following further describes the present utility model with reference to the drawings and embodiments;

[0021] Figure 1 It is the axonometric view of the water pump assembly of an embodiment of the electric pump provided by the present utility model;

[0022] Figure 2 It is the sectional axonometric view of the hidden impeller assembly of the electric pump provided by the present utility model, one of the embodiments;

[0023] Figure 3It is a cross-sectional view of an impeller assembly of the electric pump provided by the present utility model, showing one embodiment.

[0024] Figure 4 It is an exploded axonometric view of an impeller assembly of the electric pump provided by the present utility model, showing one embodiment.

[0025] Figure 5 It is a sectional view of a base assembly of the electric pump provided by the present utility model, showing one embodiment.

[0026] Figure 6 It is a cross-sectional view of a casing of the electric pump provided by the present utility model, showing one embodiment.

[0027] Figure 7 It is an axonometric view of a base foot of the electric pump provided by the present utility model, showing one embodiment.

[0028] Figure 8 It is an axonometric view of a pump body flow channel surface of the electric pump provided by the present utility model, showing one embodiment.

[0029] Figure 9 It is an axonometric view of the electric pump provided by the present utility model, showing one embodiment. Detailed Description of the Specific Embodiment

[0030] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to visually and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be understood that for orientation descriptions, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model.

[0032] In the description of the present utility model, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number.

[0033] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0034] Refer toFigures 1 to 9 , the following embodiments are made for an axial magnetic energized pump of the present utility model:

[0035] As Figure 1 shown, the composition and assembly relationship of components of an axial magnetic energized pump of the present utility model are given. The electric pump includes: a motor base assembly 100, a fixed shaft 200, an impeller assembly 300, and a pump body 400; the fixed shaft is inserted into the housing bushing - the impeller assembly is installed into the fixed pump body - the spigot is aligned with the housing, the pump body sleeve is aligned with the fixed rotating shaft, and the pump body and the housing are fixed with bolts.

[0036] As Figure 2 shown, the structural relationship between the housing assembly of the present utility model and the pump chamber and the fixed rotating shaft is given; the motor base assembly includes a housing 130 and a stator winding core 110. A partition 131 made of non-magnetic material is axially arranged in the housing 130 as the axial air gap of the motor. The partition divides the housing into two chambers, which are the stator winding core side and the pump body side 132 respectively. The pump chamber 500 is formed by the pump body side of the housing and the flow channel side of the pump body; both ends of the fixed shaft are respectively fixed on the shaft sleeves at the axial ends of the two parts forming the pump chamber 500; the impeller assembly 300 rotates on the fixed shaft 200 as the rotor of this axial flux motor.

[0037] As Figure 3 -- Figure 4 shown, the structure and assembly relationship of the impeller assembly 300. The impeller assembly includes: a permanent magnet 310, a back plate 320, a lower seat 330, a vane plate 340, and a bushing 350. The permanent magnet is closely attached to the inner side 331 of the lower seat 330 in the axial direction, and the back plate 320 is closely attached to the other side of the permanent magnet 310 as the rotor back plate; the lower seat 330 and the vane plate 340 encapsulate the permanent magnet 310 and the back plate 320 into a whole. The bushing 350 is placed on the axis of the lower seat 330. The outer circle of the bushing has an interference fit with the installation hole of the lower seat bushing and an anti-rotation cutting surface is provided.

[0038] As Figure 5 shown, the assembly and composition of the components of the motor base assembly 100 are given; the motor base assembly includes: a stator winding core 110, a stator pressing plate 120, a housing 130, a housing foot 140, a control and drive board 150, and a rear cover 160; the axial end face of the stator winding core 110 closely adheres to the plane of the partition 131 of the housing. Radially, it is positioned by 136, and axially, the 138 surface is pressed by a pressing plate and screws. After the stator winding core is positioned, it is fixed by integral injection molding with the housing to ensure the consistency of the axial air gap of the motor and the heat dissipation of the stator.

[0039] As Figure 6 , Figure 7As shown, the design details of the housing 130 are given. An axial boss 135 is provided on the stator side of the housing partition 131, serving as the radial positioning 136 and axial pressing surface 138 of the stator winding core. The stator winding core is axially pressed by the stator pressing plate 120; a bushing mounting hole 134 is provided on the other side 132 of the housing partition.

[0040] Figure 7 As shown, the installation method of the housing 130 and the base feet 140 is given. The housing 130 is provided with an axial dovetail groove to guide the base feet 140 and is fixed by axial screws 142.

[0041] Figure 8 As shown, the relative positions of the water inlet, water outlet, flow channel, mounting stop, and bushing of the pump body 400 are given; a bushing bracket 403 is provided on the axis of the water inlet on the flow channel side 402 of the pump flow for fixing the bushing 220.

[0042] Figure 9 As shown, a kind of electric pump prototype of this embodiment is given, including: the integrated design of the motor 100, the pump body 400, and the base feet 140. The water inlet and outlet are arranged at 90 degrees, and the power supply and control lines are led out from the rear cover.

[0043] In this embodiment, the blades of the impeller assembly 300 are of an open design, and can also be designed as a closed impeller. The outer diameter of the impeller is not limited to the outer diameter size of the lower seat 330.

[0044] The above has specifically described the preferred embodiments of the present utility model, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An axial magnetic flux electric pump, comprising a motor base assembly (100), a fixed shaft (200), an impeller assembly (300), and a pump body (400), wherein the motor base assembly (100) comprises a housing (130), a stator winding core (110), and is characterized in that The housing (130) of the motor base assembly is axially provided with a partition (131) using a non-magnetic conductive material as the motor axial air gap. The partition (131) divides the housing (130) into two cavities. The two cavities are divided into a stator winding core side and a pump body side (132). The pump body side of the housing (130) and the flow channel side of the pump body (400) form a pump cavity (500).

2. An axial flux electric pump according to claim 1, characterized in that The impeller assembly (300) serves as the rotor of the axial flux motor. The impeller assembly (300) rotates on the fixed shaft (200). The two ends of the fixed shaft (200) are respectively fixed to the two parts constituting the pump chamber (500), the casing (130) and the shaft sleeves at the two axial ends of the pump body (400).

3. An axial flux electric pump according to claim 2, characterized in that: The motor base assembly (100) further comprises a stator pressure plate (120), a base foot (140), a drive plate (150), and a rear cover (160). An axial boss (135) is designed on the stator core side of the housing (130) to serve as radial positioning and axial compression of the stator winding core (110), and a shaft sleeve mounting hole (134) is provided on the other side of the partition plate (131).

4. An axial flux electric pump according to claim 3, characterized in that: The impeller assembly (300) comprises: a permanent magnet (310), a back plate (320), a lower seat (330), a blade plate (340), and a shaft sleeve (350); the permanent magnet (310) is closely attached to the axial inner side (331) of the lower seat (330); the back plate (320) is closely attached to the other side of the permanent magnet (310) to serve as a rotor back plate; the lower seat (330) and the blade plate (340) encapsulate the permanent magnet (310) and the back plate (320) into a whole.

5. An axial flux electric pump according to claim 1, characterized in that: The housing (130) is provided with an axial dovetail groove, and the base foot (140) is fixed by means of axially arranged screws, so that assembly is convenient and stability is good.

6. An axial flux electric pump according to claim 2, characterized in that: A shaft sleeve bracket (403) is provided on the axis of the water inlet on the pump flow channel side (402) for fixing the shaft sleeve.

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