Electronic water pump structure with reduced cost and low pulsation

Abstract

The utility model relates to the technical field of electronic water pumps, in particular to an electronic water pump structure with reduced cost and low pulsation, which is characterized in that a pump core component is arranged in an electronic water pump shell, the lower electromagnetic vibration noise is, the lower electromagnetic vibration noise is, the lower electromagnetic vibration noise is, the lower electromagnetic vibration noise is riveted by rivets during assembly, subsequent welding is not needed, and an assembled stator can be directly coated with plastic. After the stator iron core is divided into blocks, waste materials are reduced during stamping, and the cost of raw materials is reduced; comprising an upper shell and a lower shell, the lower shell is arranged at the bottom end of the upper shell, the upper shell and the lower shell form an electronic water pump shell, and the electronic water pump further comprises a pump core assembly which is arranged in the electronic water pump shell.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic water pumps, and in particular to an electronic water pump structure that reduces cost and pulsation. Background Technology

[0002] With increasingly stringent requirements for energy conservation and environmental protection, pumps, as key power sources, must also meet the standards of high efficiency and low energy consumption.

[0003] A water pump is a machine that transports or pressurizes liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals.

[0004] The current structure typically uses sintered NdFeB magnets, and the general structure is either built-in or surface-mounted. The existing structure requires first assembling the magnet and the rotor core, and then molding the rotor core and the magnet into a whole rotor assembly through two injection molding processes. Because the magnet needs to be fixed during injection molding, it generally requires two injection molding processes. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an electronic water pump structure with reduced cost and low pulsation.

[0006] This utility model discloses a cost-reducing, low-pulsation electronic water pump structure, including an upper housing and a lower housing. The lower housing is located at the bottom of the upper housing, and the upper and lower housings constitute the electronic water pump housing. It also includes a pump core assembly, which is disposed inside the electronic water pump housing. The lower the electromagnetic vibration noise of the pump core assembly disposed inside the electronic water pump housing, the more efficient the assembly is. During assembly, rivets are used for riveting, eliminating the need for subsequent welding. The assembled stator can be directly coated with plastic. After the stator core is divided into sections, the waste generated during stamping is reduced, thus lowering the raw material cost.

[0007] Preferably, the pump core assembly includes an isolation sleeve, an impeller, an impeller component, a resin magnetic rotor, a shaft assembly, a fixed shaft pin, a stator yoke core, a stator tooth core, a stator injection molded part, connecting terminals, and a control board. The electronic water pump housing contains, from top to bottom, the isolation sleeve, impeller, impeller component, resin magnetic rotor, shaft assembly, fixed shaft pin, stator yoke core, stator tooth core, stator injection molded part, connecting terminals, and control board. This structure does not require a rotor core; the resin-bonded magnetic rotor is directly... The rotor assembly is injection molded. At the same time, the adhesive magnetic rotor can be magnetized in multiple poles. The magnetization waveform is a sine wave. Since the motor is controlled by FOC, the current waveform is a sine wave. Therefore, the better the sinusoidality of the magnetization waveform, the lower the electromagnetic vibration noise. As for the stator: the stator core is separated by a magnetic yoke. After adopting the segmented core, the rotor core generated inside will no longer produce waste when stamping the stator core. Moreover, after segmentation, the stator core can be reasonably arranged to greatly reduce the generation of stamping waste.

[0008] Preferably, the outer rounded corner of the resin magnetic rotor has an arc-shaped groove; the arc-shaped groove at the outer rounded corner of the resin magnetic rotor optimizes the magnetic circuit and reduces the fluctuation of the cogging torque.

[0009] Preferably, the stator yoke core and the stator tooth core are tightened by interference pins; during assembly, the interference pins tighten the yoke core and the tooth core, which is a simple process and does not require multiple welding.

[0010] Preferably, the impeller is an injection-molded impeller.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the pump core assembly is set inside the electronic water pump housing, the electromagnetic vibration noise is lower, and during assembly, rivets are used for riveting, eliminating the need for subsequent welding. The assembled stator can be directly plastic-coated. After the stator core is divided into blocks, the waste generated during stamping is reduced, thus lowering the cost of raw materials. Attached Figure Description

[0012] Figure 1 This is an exploded structural diagram of the present invention;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 This is a first enlarged structural schematic diagram of the stator yoke core and stator tooth core structure;

[0015] Figure 4 This is an enlarged structural diagram of the stator yoke core and stator tooth core, etc.

[0016] Figure 5 This is a second enlarged structural diagram of the stator yoke core and stator tooth core, etc.

[0017] The following are labels in the attached diagram: 1. Upper housing; 2. Isolation sleeve; 3. Impeller; 4. Impeller component; 5. Resin magnetic rotor; 6. Shaft assembly; 7. Fixed pin; 8. Stator yoke core; 9. Stator tooth core; 10. Stator injection molded part; 11. Connecting terminal; 12. Control board; 13. Lower housing. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0019] Example

[0020] like Figures 1 to 5 As shown, the present invention provides a cost-reducing and low-pulsation electronic water pump structure, including an upper housing 1 and a lower housing 13. The lower housing 13 is provided at the bottom of the upper housing 1. The upper housing 1 and the lower housing 13 constitute the electronic water pump housing. It also includes a pump core assembly, which is provided inside the electronic water pump housing.

[0021] The pump core assembly includes an isolation sleeve 2, an impeller 3, an impeller component 4, a resin magnetic rotor 5, a shaft assembly 6, a fixed shaft pin 7, a stator yoke core 8, a stator tooth core 9, a stator injection molded part 10, a connecting terminal 11, and a control board 12. The electronic water pump housing is provided with the following components arranged from top to bottom: isolation sleeve 2, impeller 3, impeller component 4, resin magnetic rotor 5, shaft assembly 6, fixed shaft pin 7, stator yoke core 8, stator tooth core 9, stator injection molded part 10, connecting terminal 11, and control board 12.

[0022] The resin magnetic rotor 5 has an arc-shaped groove at its outer rounded corner;

[0023] The stator yoke core 8 and the stator tooth core 9 are tightened by interference pins.

[0024] The impeller component 4 is an injection-molded impeller.

[0025] In this embodiment, a pump core assembly is installed inside the electronic water pump housing. The lower the electromagnetic vibration noise, the less waste is generated during assembly. Rivets are used for riveting, eliminating the need for subsequent welding. The assembled stator can be directly plastic-coated. After the stator core is divided into sections, the waste generated during stamping is reduced, thus lowering the raw material cost. This structure does not require a rotor core. The resin-bonded magnetic rotor is directly injection-molded into a rotor assembly. At the same time, the bonded magnetic rotor can be multi-pole magnetized, and the magnetization waveform is a sine wave. Since the motor control method is FOC control, the current waveform is a sine wave. Therefore, the better the sinusoidality of the magnetization waveform, the lower the electromagnetic vibration noise. Regarding the stator: a magnetic yoke is used to separate the stator core. After using a segmented core, the rotor core generated inside no longer generates waste during the stamping of the stator core. Furthermore, after segmentation, the stator core can be rationally arranged to reduce the generation of stamping waste.

[0026] This utility model discloses a cost-reducing and low-pulsation electronic water pump structure. This structure does not require a rotor core. The magnetic rotor, which is bonded with resin, is directly injection molded into a rotor assembly. At the same time, the bonded magnetic rotor can be magnetized in multiple poles. The magnetization waveform is a sine wave. Since the motor is controlled by FOC and the current waveform is a sine wave, the better the sinusoidality of the magnetization waveform, the lower the electromagnetic vibration noise.

[0027] Because the rotor core is eliminated, but the rotor core inside the inner hole is still generated as scrap when the stator is a complete circle during stamping, this structure uses a separate stator core, completely separating the stator yoke and teeth. During assembly, rivets are used for riveting, eliminating the need for subsequent welding. The assembled stator can be directly plastic-coated. After the stator core is divided into sections, scrap is reduced during stamping, lowering raw material costs. This structure is mainly used to reduce the cost pressure of electronic water pumps and reduce electromagnetic torque pulsation. Improvements are made in two aspects: firstly, the rotor core is eliminated, and resin and magnetic powder are directly injection molded into an integral rotor structure. The resin magnetic rotor 5 of this utility model, which reduces costs and pulsation in electronic water pumps, is commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring creative labor from those skilled in the art.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cost-reducing, low-pulsation electronic water pump structure, comprising an upper housing (1) and a lower housing (13), wherein the lower housing (13) is disposed at the bottom end of the upper housing (1), and the upper housing (1) and the lower housing (13) constitute the electronic water pump housing, characterized in that, It also includes a pump core assembly, which is disposed inside the housing of the electronic water pump.

2. The cost-reducing, low-pulsation electronic water pump structure as described in claim 1, characterized in that, The pump core assembly includes an isolation sleeve (2), an impeller (3), an impeller component (4), a resin magnetic rotor (5), a shaft assembly (6), a fixed shaft pin (7), a stator yoke core (8), a stator tooth core (9), a stator injection molded part (10), a connecting terminal (11), and a control board (12). The electronic water pump housing is arranged from top to bottom as follows: isolation sleeve (2), impeller (3), impeller component (4), resin magnetic rotor (5), shaft assembly (6), fixed shaft pin (7), stator yoke core (8), stator tooth core (9), stator injection molded part (10), connecting terminal (11), and control board (12).

3. The low-cost, low-pulsation electronic water pump structure as described in claim 2, characterized in that, The resin magnetic rotor (5) has an arc-shaped groove at its outer rounded corner.

4. The low-cost, low-pulsation electronic water pump structure as described in claim 2, characterized in that, The stator yoke core (8) and stator tooth core (9) are tightened by interference pins.

5. The cost-reducing, low-pulsation electronic water pump structure as described in claim 2, characterized in that, The impeller component (4) is an injection-molded impeller.

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