A motor structure for reducing vibration noise of a motor

Abstract

The utility model relates to the technical fields of motor, especially a motor structure for reducing motor vibration noise, which can solve the problems of electromagnetic and mechanical vibration at the same time, significantly improve the silence performance and reliability of electronic water pump, comprising upper volute, impeller rotor, pivot, rotor assembly, waterproof chamber, stator assembly and casing, further comprising magnetic slot wedge, the casing top end is provided with upper volute, and the upper volute and casing form a chamber inside, the chamber is provided with stator assembly and rotor assembly, the waterproof chamber is arranged between rotor assembly and stator assembly, the rotor assembly is fixedly connected with pivot, the pivot is provided with impeller rotor, the waterproof chamber is provided with magnetic slot wedge, the magnetic slot wedge is provided with dog, the stator assembly is provided with stator slot, and the dog is matched with stator slot, and the magnetic slot wedge has magnetic conductivity.

Description

Technical Field

[0001] This utility model relates to the technical field of motors, and in particular to a motor structure for reducing motor vibration and noise. 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] This brushless motor is mainly used in electronic water pumps. When used in electronic water pumps, two problems arise. On the one hand, this electronic water pump is a centrifugal pump. When the impeller rotates, the liquid is thrown from the center of the impeller to the outer edge by centrifugal force, forming a low-pressure zone at the impeller inlet and a high-pressure zone at the outlet. The pressure on the front and rear cover plates of the impeller is asymmetrical, creating an axial thrust from the high-pressure side (rear cover plate) to the low-pressure side (front cover plate). This is the main source of axial force (accounting for 70-90% of the total axial force). Axial force leads to bearing wear and vibration noise.

[0005] On the one hand, brushless motors have the following problems due to the slot design: when the rotor permanent magnet rotates, the magnetic reluctance (air gap permeability) in the magnetic circuit changes periodically as it passes through the slots and teeth. Even when the motor is not energized, this change in magnetic reluctance will cause the rotor to experience a periodic positioning torque, called cogging torque. Especially at low speeds, this can lead to uneven rotation speed, resulting in uncomfortable mechanical vibrations and electromagnetic noise (humming), affecting position servo and low-speed smoothness control. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a motor structure that reduces motor vibration and noise.

[0007] This utility model discloses a motor structure for reducing motor vibration and noise, comprising an upper volute, an impeller rotor, a shaft, a rotor assembly, a waterproof chamber, a stator assembly, and a housing, and further including a magnetic wedge. The upper volute is located at the top of the housing, forming a cavity with the upper volute and the interior of the housing. The stator assembly and rotor assembly are housed within the cavity. The waterproof chamber is positioned between the rotor assembly and the stator assembly. The rotor assembly is fixedly connected to the shaft, and the impeller rotor is mounted on the shaft. A magnetic wedge with a locking claw is located on the waterproof chamber. The stator assembly has stator slots, and the locking claws are adapted to fit the stator slots. The magnetic wedge possesses magnetic conductivity. In use, the rotor assembly and stator assembly are... The components are installed inside the housing, and the waterproof chamber is installed between the rotor assembly and the stator assembly. At the same time, the magnetic slot wedge installed on the waterproof chamber is engaged with the stator slot on the stator assembly by the claws. One end of the shaft is fixedly connected to the rotor assembly. Then, the upper volute cover is installed on the top of the housing and connected by screws. The impeller rotor is installed on the end of the shaft away from the rotor assembly. The claws on the magnetic slot wedge are engaged with the stator slot on the stator assembly. The reverse axial force generated by the interaction of the magnetic field of the magnetic slot wedge and the stator assembly balances the axial thrust generated by the centrifugal pump impeller, reducing mechanical vibration and noise. This structure has a high degree of integration and can solve electromagnetic and mechanical vibration problems at the same time, significantly improving the quiet performance and reliability of the electric water pump.

[0008] Preferably, the waterproof chamber and the magnetic groove wedge are integrally molded by injection molding; this achieves a perfect seal with zero gap and no interface between the waterproof chamber and the magnetic groove wedge, while reducing the number of parts and assembly steps.

[0009] Preferably, the magnetic slot wedge is made of a magnetically conductive composite material.

[0010] Preferably, the magnetically conductive composite material is made of glass fiber cloth, epoxy resin and iron powder bonded together.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, the rotor assembly and stator assembly are installed inside the housing, and the waterproof chamber is installed between the rotor assembly and the stator assembly. At the same time, the magnetic slot wedge installed on the waterproof chamber is engaged with the stator slot on the stator assembly by the claw. One end of the rotating shaft is fixedly connected to the rotor assembly. Then, the upper volute cover is installed on the top of the housing and connected by screws. The impeller rotor is installed on the end of the rotating shaft away from the rotor assembly. The claw on the magnetic slot wedge is engaged with the stator slot on the stator assembly. The reverse axial force generated by the interaction of the magnetic field of the magnetic slot wedge and the stator assembly balances the axial thrust generated by the centrifugal pump impeller, reducing mechanical vibration noise. This structure has a high degree of integration and can solve electromagnetic and mechanical vibration problems at the same time, significantly improving the quiet performance and reliability of the electronic water pump. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the axial cross-sectional structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a schematic diagram of the radial cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the stator assembly and the magnetic slot wedge structure. Figure 5 This is an enlarged schematic diagram of the magnetic slot wedge structure.

[0013] The following are labels in the attached diagram: 1. Upper volute; 2. Impeller rotor; 3. Shaft; 4. Rotor assembly; 5. Waterproof chamber; 6. Magnetic slot wedge; 7. Stator assembly; 8. Casing. Detailed Implementation

[0014] 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. Example

[0015] like Figures 1 to 5 As shown, this utility model discloses a motor structure for reducing motor vibration and noise, including an upper volute 1, an impeller rotor 2, a shaft 3, a rotor assembly 4, a waterproof chamber 5, a stator assembly 7, and a housing 8. It also includes a magnetic wedge 6. The upper volute 1 is located at the top of the housing 8, and the upper volute 1 and the housing 8 form a cavity. The stator assembly 7 and the rotor assembly 4 are housed within the cavity. The waterproof chamber 5 is located between the rotor assembly 4 and the stator assembly 7. The rotor assembly 4 is fixedly connected to the shaft 3, and the impeller rotor 2 is mounted on the shaft 3. The waterproof chamber 5 is equipped with a magnetic wedge 6, which has a locking claw. The stator assembly 7 has stator slots, and the locking claws are adapted to the stator slots. The magnetic wedge 6 has magnetic conductivity. The waterproof chamber 5 and the magnetic groove wedge 6 are integrally formed by injection molding; The magnetic slot wedge 6 is made of a magnetically conductive composite material, which is composed of glass fiber cloth, epoxy resin and iron powder bonded together.

[0016] In this embodiment, during use, the rotor assembly 4 and stator assembly 7 are installed inside the housing 8, and the waterproof chamber 5 is installed between the rotor assembly 4 and the stator assembly 7. Simultaneously, the magnetic slot wedge 6 installed on the waterproof chamber 5 is engaged with the stator slot on the stator assembly 7 via claws. One end of the rotating shaft 3 is fixedly connected to the rotor assembly 4. Then, the upper volute 1 is installed on the top of the housing 8 and connected by screws. An impeller rotor 2 is installed at the end of the rotating shaft 3 away from the rotor assembly 4. The claws on the magnetic slot wedge 6 are engaged with the stator slot on the stator assembly 7. The magnetic interaction between the magnetic slot wedge 6 and the stator assembly 7 generates a counter-current... The axial force is balanced to reduce the axial thrust generated by the centrifugal pump impeller, thus reducing mechanical vibration and noise. This highly integrated structure can simultaneously solve electromagnetic and mechanical vibration problems, significantly improving the quietness and reliability of the electric water pump. Inside the electric water pump, the rotor assembly 4 and the stator assembly 7 are separated by a waterproof chamber 5. A magnetic slot wedge 6 is added to the waterproof chamber 5. The magnetic slot wedge 6 is directly injection molded into the waterproof chamber 5. The claws on the magnetic slot wedge 6 engage and seal with the stator slot on the stator assembly 7. Due to the magnetic conductivity of the slot wedge, the rotor will be subjected to an axial force in the opposite direction of the slot wedge, thereby balancing the axial force.

[0017] The impeller rotor 2 of the motor structure for reducing motor vibration and noise of this utility model is commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0018] 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 motor structure for reducing motor vibration and noise, comprising an upper volute (1), an impeller rotor (2), a shaft (3), a rotor assembly (4), a waterproof chamber (5), a stator assembly (7), and a housing (8), characterized in that, It also includes a magnetic slot wedge (6), an upper volute (1) is provided at the top of the housing (8), and a cavity is formed between the upper volute (1) and the housing (8). A stator assembly (7) and a rotor assembly (4) are provided in the cavity. A waterproof chamber (5) is provided between the rotor assembly (4) and the stator assembly (7). The rotor assembly (4) is fixedly connected to the shaft (3). An impeller rotor (2) is provided on the shaft (3). A magnetic slot wedge (6) is provided on the waterproof chamber (5). A pawl is provided on the magnetic slot wedge (6). A stator slot is provided on the stator assembly (7). The pawl is adapted to the stator slot. The magnetic slot wedge (6) has magnetic conductivity.

2. The motor structure for reducing motor vibration and noise as described in claim 1, characterized in that, The waterproof chamber (5) and the magnetic groove wedge (6) are integrally formed by injection molding.

3. The motor structure for reducing motor vibration and noise as described in claim 1, characterized in that, The magnetic slot wedge (6) is made of magnetically conductive composite material.

4. The motor structure for reducing motor vibration and noise as described in claim 3, characterized in that, The magnetically conductive composite material is made of glass fiber cloth, epoxy resin and iron powder bonded together.

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