Low noise water pump motor

Abstract

The utility model discloses a low noise water pump motor, including pump shell, drive box and the impeller subassembly of floating installation in the inboard of pump shell, the surface fixed sleeve of drive box has flange ring and is fixedly connected with pump shell through flange ring, and the surface of pump shell and drive box is equipped with liquid discharge port and liquid inlet port respectively. Impeller subassembly includes centrifugal impeller, shaft flow oar axle and a plurality of permanent -magnetic sheet that is evenly distributed on the surface of centrifugal impeller, and the inboard fixed mounting of drive box has excitation coil, and its surface is embedded and is installed with the ring -shaped magnetic yoke piece that is pasted with excitation coil, realizes electromagnetic drive. Centrifugal impeller back surface is equipped with plane bearing for reducing friction and reducing noise, drive box inner wall is coated with sound insulation damping material, and buffer sealing washer is equipped between flange ring and pump shell, and pump shell adopts the composite sound insulation structure of metal matrix and macromolecular damping layer. This structure can balance the magnetic field effect, reduce electromagnetic and mechanical noise, improve the sealing property and operating stability.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to a low-noise water pump motor. Background Technology

[0002] Currently, water pump motors are widely used in industrial water supply, HVAC systems, and household appliances. Their operating efficiency and noise levels directly affect the service life of the equipment and the comfort of the application environment. Most existing water pump motors use traditional stator-rotor electromagnetic drive, where a magnetic field generated by the stator coils drives the rotor to rotate, and the impeller pressurizes and transports the fluid. While this type of motor has a relatively mature structure, it still exhibits significant noise and vibration problems during long-term operation.

[0003] Typical water pump motors rely on rolling or sliding bearings to support the impeller rotor. These bearings are prone to frictional noise and wear at high speeds, leading to decreased operational stability. Simultaneously, uneven distribution of electromagnetic forces between the stator and rotor can create eccentric torque, generating electromagnetic noise. Furthermore, some water pump motors lack noise reduction measures for the mechanical connection between the drive housing and the pump casing, allowing mechanical vibrations during motor operation to be directly transmitted to the outer casing, further amplifying the noise level.

[0004] Furthermore, traditional pump casings are mostly single-layer metal structures, which, while possessing high strength and pressure resistance, offer limited suppression of vibration and noise. The drive housing typically lacks sound-insulating and damping materials, resulting in ineffective absorption of electromagnetic noise and mechanical vibration, leading to insufficient overall noise reduction performance. These shortcomings make it difficult for existing water pump motors to meet the noise control requirements of applications demanding quiet environments, such as residential water supply systems, medical equipment water systems, and industrial applications requiring long-term stable operation.

[0005] In summary, existing water pump motors generally suffer from problems such as significant frictional noise, high electromagnetic noise, strong mechanical vibration transmission, and insufficient sound insulation performance of the pump casing. There is an urgent need for a new type of water pump motor with improvements in both structural design and noise reduction measures to achieve low noise, low vibration, and high stability operation. Utility Model Content

[0006] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0007] Therefore, the technical solution adopted by this utility model is as follows: a low-noise water pump motor, including a pump casing, a drive box, and an impeller assembly floatingly mounted inside the pump casing. A flange ring is fixedly fitted onto the outer surface of the drive box, and the drive box is fixedly connected to the surface of the pump casing through the flange ring, thereby achieving overall sealing and support. The surfaces of the pump casing and the drive box are respectively provided with a drain port and an inlet port, facilitating the inflow and outflow of liquid. The impeller assembly includes a centrifugal impeller and an axial flow propeller shaft. The surface of the centrifugal impeller is provided with several permanent magnet plates, forming the motor rotor. An excitation coil is fixedly mounted inside the drive box, and a magnetic yoke plate is embedded in its surface and fixedly attached to one side of the excitation coil, forming the motor stator. The axial flow propeller shaft is fixed to the surface of the centrifugal impeller and located at the axis of the drive box. Through the above structure, stable magnetic field coupling between the rotor and the stator is achieved, thereby driving the impeller to rotate and realizing the pressurization and discharge of fluid.

[0008] In a preferred embodiment, the centrifugal impeller is further configured such that a flat bearing is provided on the back side to provide support during impeller assembly rotation and reduce frictional resistance. Specifically, this structure effectively reduces frictional noise during operation, extends the service life of the impeller assembly, and ensures smooth motor operation.

[0009] In a preferred embodiment, the permanent magnet plates are further configured such that they are evenly distributed along the circumference of the centrifugal impeller and positioned opposite the excitation coil. Specifically, this design enables a balanced magnetic field distribution during motor operation, reduces eccentric torque, ensures rotor stability under stress, thereby reducing electromagnetic noise and improving drive efficiency.

[0010] In a preferred embodiment, the magnetic yoke is further configured such that it is arranged in a ring array on the inner wall of the drive box and is tightly fitted with the excitation coil. Specifically, this structure enhances the closure effect of the magnetic circuit, reduces electromagnetic energy loss, improves magnetic field utilization, and simultaneously reduces electromagnetic noise, ensuring stable motor operation.

[0011] In a preferred embodiment, the inner wall of the drive box is further coated with a sound-insulating damping material to absorb noise generated during operation due to electromagnetic forces and mechanical vibrations. Specifically, this measure can significantly reduce the overall operating noise of the motor, improve the comfort of the user environment, and is particularly suitable for applications requiring high levels of quietness.

[0012] In a preferred embodiment, a buffer sealing gasket is further configured between the flange ring and the pump housing to achieve vibration damping and sealing at the connection. Specifically, this structure can effectively reduce the intensity of mechanical vibration transmission while improving the sealing performance at the connection, thus preventing liquid leakage.

[0013] In a preferred embodiment, the pump casing is further configured as follows: the inner layer is a metal matrix to ensure structural strength and pressure resistance, and the outer layer is covered with a polymer damping layer. Specifically, this design ensures the overall strength of the pump casing while providing excellent sound insulation and vibration reduction, thereby further reducing operating noise.

[0014] The beneficial effects achieved by this utility model are as follows: 1. In this invention, the impeller assembly adopts a floating installation structure. Permanent magnets are evenly distributed on the surface of the centrifugal impeller. Combined with the excitation coil inside the drive box and the annularly arranged magnetic yoke, a uniform and stable magnetic field force is formed, thereby ensuring force balance on the impeller during operation and reducing electromagnetic noise. Simultaneously, the planar bearing on the back of the centrifugal impeller provides reliable support during rotation, reducing frictional resistance, effectively lowering operating noise, and improving operational stability.

[0015] 2. In this invention, the inner wall of the drive box is coated with sound-insulating and damping material, a buffer sealing gasket is added between the flange ring and the pump casing, and the pump casing body adopts a composite sound-insulating structure of an inner metal matrix and an outer polymer damping layer. These multiple noise reduction measures work synergistically to absorb and isolate noise generated by electromagnetic force, liquid impact, and mechanical vibration, significantly reducing overall operating noise and improving the stability and comfort of the motor under high load and long-term operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic cross-sectional view of the pump casing and drive box according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the drive box and its internal excitation coil structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the impeller assembly structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the back structure of an impeller assembly according to an embodiment of the present invention.

[0017] Figure label: 100. Pump casing; 110. Drain port; 200, Drive box; 210, Liquid inlet port; 220, Excitation coil; 201, Flange ring; 221, Magnetic yoke; 300. Impeller assembly; 310. Centrifugal impeller; 320. Axial flow propeller shaft; 330. Permanent magnet sheet; 311. Surface bearing. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0019] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0020] The following describes some embodiments of a low-noise water pump motor provided by this utility model, with reference to the accompanying drawings.

[0021] Combination Figures 1-5 As shown, this utility model provides a low-noise water pump motor, including a pump housing 100, a drive box 200, and an impeller assembly 300 floatingly mounted inside the pump housing 100. A flange ring 201 is fixedly fitted onto the outer surface of the drive box 200, and the drive box 200 is fixedly connected to the surface of the pump housing 100 through the flange ring 201, thereby achieving overall sealing and support. The surface of the pump housing 100 is provided with a drain port 110, and the surface of the drive box 200 is provided with a liquid inlet port 210. Liquid enters through the liquid inlet port 210, is pressurized by the impeller assembly 300, and finally discharged from the drain port 110.

[0022] The impeller assembly 300 includes a centrifugal impeller 310 and an axial flow propeller shaft 320. A plurality of permanent magnet plates 330 are evenly distributed on the surface of the centrifugal impeller 310, forming the magnetic poles of the motor rotor. The axial flow propeller shaft 320 is fixedly connected to the surface of the centrifugal impeller 310 and is located at the axis of the drive box 200 for transmitting fluid kinetic energy. An excitation coil 220 is fixedly installed inside the drive box 200, and a magnetic yoke plate 221 is embedded in its surface. The magnetic yoke plate 221 is tightly fitted to one side of the excitation coil 220, forming the stator magnetic field of the motor. The impeller assembly 300 is driven efficiently through the electromagnetic interaction between the permanent magnet plates 330 and the excitation coil 220.

[0023] In a preferred embodiment, a plane bearing 311 is provided on the back of the centrifugal impeller 310 to support the impeller assembly 300 during rotation, reduce frictional resistance, thereby effectively reducing operating noise and improving operational stability.

[0024] In another embodiment, the permanent magnet plates 330 are uniformly distributed along the circumference of the centrifugal impeller 310 and are all positioned opposite to the excitation coil 220. This structure enables the motor to obtain a uniform magnetic field force during operation, reduces eccentric torque, and improves the stability and output efficiency of the motor operation.

[0025] In another embodiment, the magnetic yoke 221 is arranged in a ring array on the inner wall of the drive box 200 and is in close contact with the excitation coil 220. This structure can enhance the closure effect of the magnetic circuit, reduce electromagnetic leakage and energy loss, and reduce electromagnetic noise during motor operation.

[0026] In a preferred embodiment, the inner wall surface of the drive box 200 is coated with a sound-insulating and damping material. This material can absorb and attenuate noise generated by electromagnetic forces and mechanical vibrations during motor operation, effectively reducing the overall operating noise level.

[0027] In another embodiment, a buffer sealing gasket is provided between the flange ring 201 and the pump housing 100 to play a role in shock absorption and sealing at the flange connection, which can effectively reduce the transmission path of mechanical vibration, improve sealing performance, and prevent liquid leakage.

[0028] In another embodiment, the pump housing 100 adopts a composite sound insulation structure, with an inner metal matrix to provide sufficient mechanical strength and pressure resistance, and an outer polymer damping layer to absorb noise and vibration energy, thereby achieving an overall noise reduction effect.

[0029] In summary, this utility model, through the combination of pump casing 100, drive box 200, impeller assembly 300, excitation coil 220, and magnetic yoke 221, forms a compact and reliably sealed water pump motor. Through the supporting effect of the plane bearing 311, the relative interaction between the uniformly arranged permanent magnets 330 and the excitation coil 220, the closed magnetic circuit design of the magnetic yoke 221, and the sound insulation and vibration reduction measures of the pump casing 100 and drive box 200, low noise output is achieved during motor operation. This water pump motor has the advantages of smooth operation, low noise, high energy efficiency, and long service life, and is particularly suitable for industrial and domestic water pump applications with high noise control requirements.

[0030] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A low-noise water pump motor, characterized in that, The system includes a pump housing (100), a drive housing (200), and an impeller assembly (300) floating inside the pump housing (100). A flange ring (201) is fixedly fitted onto the surface of the drive housing (200), and the drive housing (201) is fixedly connected to the surface of the pump housing (100) via the flange ring (201). The surfaces of the pump housing (100) and the drive housing (200) are respectively provided with a drain port (110) and an inlet port (210). The impeller assembly (300) includes a centrifugal impeller (…). The drive box (200) includes an axial flow propeller shaft (310) and an axial flow propeller shaft (320), as well as several permanent magnet plates (330) fixed to the surface of the centrifugal impeller (310). An excitation coil (220) is fixedly installed on the inner side of the drive box (200). A magnetic yoke plate (221) is embedded in the surface of the drive box (200) and is fixedly attached to one side of the excitation coil (220). The axial flow propeller shaft (320) is fixed to the surface of the centrifugal impeller (310) and is located at the axis of the drive box (200).

2. The low-noise water pump motor according to claim 1, characterized in that, The back of the centrifugal impeller (310) is provided with a plane bearing (311) for supporting and reducing friction during the rotation of the impeller assembly (300).

3. The low-noise water pump motor according to claim 1, characterized in that, The permanent magnets (330) are evenly distributed along the circumference of the centrifugal impeller (310) and are all positioned opposite to the excitation coil (220), thereby achieving a uniform magnetic field force.

4. A low-noise water pump motor according to claim 1, characterized in that, The magnetic yoke (221) is arranged in a ring array on the inner wall of the drive box (200) and is closely attached to the excitation coil (220) to enhance the magnetic circuit closure effect and reduce electromagnetic noise.

5. A low-noise water pump motor according to claim 1, characterized in that, The inner wall of the drive box (200) is coated with sound-insulating and damping material to absorb the vibration and noise generated by the motor during operation.

6. A low-noise water pump motor according to claim 1, characterized in that, A buffer sealing gasket is provided between the flange ring (201) and the pump casing (100) to reduce the transmission of mechanical vibration and improve the sealing performance of the connection.

7. A low-noise water pump motor according to claim 1, characterized in that, The pump casing (100) adopts a composite sound insulation structure, with an inner metal matrix and an outer polymer damping layer.

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