Rim motor

Abstract

The invention discloses a rim motor which comprises a motor shell, stator assemblies and a rotor assembly, the stator assemblies are arranged at the two ends of the motor shell, the rotor assembly is arranged on the stator assemblies through bearings, the rotor assembly is located on the inner sides of the stator assemblies, blades are arranged on the rotor assembly, and first flow channels allowing liquid to flow are formed in the blades and the motor shell. The rotor assembly comprises a rotor and a rotor motor, a disturbance guide wheel is arranged on the rotor, the rotor motor is used for driving the rotor, the disturbance guide wheel and the blades to rotate, bearings arranged at the two ends of the motor can be lubricated by arranging the disturbance guide wheel, and tiny impurities in liquid can be removed and prevented from entering the bearings; tiny impurities in an air gap between the stator and the rotor are pressed out along with water flow, so that the rotor is prevented from being clamped, and the sliding bearing is guaranteed to be lubricated by sufficient water flow.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a rim motor. Background Art

[0002] The rim motor is an advanced electric direct drive technology with significant advantages such as high power density, high maneuverability, vibration and noise reduction, energy saving and environmental protection. The rim motor is widely used in ship propulsion systems (such as RDT) and aviation power systems (such as electric rim fans). Through the direct combination of the motor and the rotating parts, an efficient and compact design is achieved. The rim motor integrates the motor stator and rotor into one, eliminating intermediate links such as the transmission shaft system, thereby improving power density and efficiency. At the same time, this design also reduces noise and realizes full rotation function.

[0003] At present, the actual use of rim motors has the following problems: when the water quality does not meet the standards, impurities will enter the bearings. The impurities will interfere with the arrangement of water molecules on the bearing surface, making it difficult or unstable for the water film to form, affecting the lubrication effect and shortening the service life. Summary of the invention

[0004] In view of this, the present invention provides a rim motor, which is provided with a disturbance guide wheel, so as to remove tiny impurities in the liquid and prevent them from entering the bearing.

[0005] A rim motor provided by the present invention adopts the following technical solution:

[0006] A rim motor comprises a motor housing, a stator assembly and a rotor assembly, wherein the stator assembly is arranged at both ends of the motor housing, the rotor assembly is arranged on the stator assembly through bearings, the rotor assembly is located on the inner side of the stator assembly, the rotor assembly is provided with blades, the blades and the inside of the motor housing form a flow channel for liquid flow, the rotor assembly comprises a rotor and a rotor motor, the rotor is provided with a disturbance guide wheel, and the rotor motor is used to drive the rotor, the disturbance guide wheel and the blades to rotate.

[0007] Optionally, the cross-sectional shape of the flow channel 1 is approximately a double inverse ellipse.

[0008] Optionally, the flow channel-area relationship is as follows:

[0009] S=Z / 360×π×(R 2 / -r 2 / )-π×a×(Rr) 2

[0010] Where, S: flow channel area, unit: mm 2 ; R: outer diameter of the guide wheel, unit: mm; r: inner diameter of the flow channel, unit: mm; Z: number of flow channels; a, disturbance coefficient (related to flow velocity).

[0011] Optionally, the disturbance guide wheel is provided with a helix angle θ along the circumferential direction.

[0012] Optionally, the helix angle θ ranges from 35° to 55°.

[0013] Optionally, a flow channel 2 for communicating with the fluid in flow channel 1 is arranged at intervals along the circumference of the disturbance guide wheel on the outer contour of the disturbance guide wheel, and impurities in flow channel 1 enter into flow channel 2 and are discharged.

[0014] Optionally, the side wall of the second flow channel is provided with an elliptical arc groove.

[0015] Optionally, the disturbance guide wheel and the rotor are connected by a double key.

[0016] Optionally, the disturbance guide wheel is made of magnetically insulating material, and the surface of the disturbance guide wheel is treated for corrosion resistance.

[0017] To summarize, the present invention includes at least one of the following beneficial technical effects: by setting a disturbance guide wheel, the bearings arranged at both ends of the motor can be lubricated, tiny impurities in the liquid can be removed to prevent them from entering the bearings, and tiny impurities in the air gap between the stator and the rotor can be pressed out with the water flow to prevent the rotor from getting stuck, thereby ensuring that the sliding bearing has sufficient water flow lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0020] Figure 2 is a front view of an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of a disturbance guide wheel according to an embodiment of the present invention;

[0022] Figure 4 is a cross-sectional view of a disturbance guide wheel according to an embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Section view along AA.

[0024] Explanation of the reference numerals: 1. Motor housing; 2. Stator; 3. Rotor; 4. Disturbance guide wheel; 5. Bearing; 6. Blade; 7. Flow channel 1; 8. Flow channel 2; 9. Helix angle; 10. Arc groove. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] The following is combined with Figure 1-5 The present invention is described in further detail.

[0027] The embodiment of the invention discloses a rim motor.

[0028] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A rim motor comprises a motor housing 1, a stator 2 assembly and a rotor 3 assembly. The stator 2 assembly is arranged at both ends of the motor housing 1. The rotor 3 assembly is arranged on the stator 2 assembly through a bearing 5. The rotor 3 assembly is located on the inner side of the stator 2 assembly. The rotor 3 assembly is provided with a blade 6. The blade 6 and the inside of the motor housing 1 form a flow channel 7 for liquid flow. The rotor 3 assembly comprises a rotor 3 and a rotor 3 motor. A disturbance guide wheel 4 is arranged on the rotor 3. The rotor 3 motor is used to drive the rotor 3 and the disturbance guide wheel 4 to rotate. By arranging the disturbance guide wheel 4, the bearings 5 ​​arranged at both ends of the motor can be lubricated, and tiny impurities in the liquid can be removed to avoid entering the bearing 5. The tiny impurities in the air gap between the stator 2 and the rotor 3 are pressed out with the water flow to avoid the rotor 3 from getting stuck, and to ensure that the sliding bearing 5 has sufficient water flow lubrication.

[0029] The cross-sectional shape of the flow channel 1 7 is approximately a double inverted ellipse. The blade 6 is a propeller. There are two propellers. The inner radius of the blade 6 of the two propellers is larger than the outer radius. The cross-sectional shape is approximately an ellipse, so that the shape of the blade 6 in the flow channel 1 7 is approximately a hyperbola. The cross-sectional shape of the flow channel 1 7 not covered by the blade 6 is approximately a double inverted ellipse, that is, the flow channel 1 7 has two elliptical shapes in opposite directions.

[0030] The flow channel area relationship is as follows:

[0031] S=Z / 360×π×(R 2 / -r 2 / )-π×a×(Rr) 2

[0032] Where, S: flow channel area, unit: mm 2 ; R: outer diameter of the guide wheel, unit: mm; r: inner diameter of the flow channel, unit: mm; Z: number of flow channels; a, disturbance coefficient (related to flow velocity).

[0033] A double inverse elliptical flow channel 7 is used to ensure that high-speed water flows according to the designed flow channel 7, prevent radial overflow of water flow, and help guide the water flow to form a stable flow pattern in the flow channel 7. The side wall of the flow channel 7 has an appropriate curvature to prevent the water flow from overflowing in the radial direction, thereby ensuring a smooth transition of the water flow and minimizing overflow.

[0034] The outer contour of the disturbance guide wheel 4 is provided with flow channel 2 8 which is spaced apart from the flow channel 1 7 along the circumference of the disturbance guide wheel 4, and the impurities in the flow channel 1 7 enter the flow channel 2 8 and are discharged. The side wall of the flow channel 2 8 is provided with an elliptical arc groove 10. The design of the arc groove 10 helps to reduce the resistance of the fluid in the flow channel 2 8, so that the impurities can be discharged more smoothly.

[0035] The disturbance guide wheel 4 is provided with a helix angle 9θ along the circumferential direction, and the helix angle 9θ ranges from 35° to 55°. In this embodiment, the helix angle 9θ is 45°. The pressure of the forward and reverse water flows is ensured to be equal, load fluctuation is avoided, axial pressure is applied to the water flow, sufficient water flow lubrication is ensured for the bearing 5, and a complete water film is easily formed when the motor starts, reducing the friction coefficient; at the same time, the tiny impurities in the air gap of the stator and rotor 3 are pressed out with the water flow to avoid the rotor 3 from getting stuck.

[0036] The disturbance guide wheel 4 and the rotor 3 are connected by a double key, which can transmit torque more effectively, improve the reliability and stability of the connection, and ensure stability and reliability when transmitting torque and bearing loads.

[0037] The disturbance guide wheel 4 is made of magnetically insulating material, and the surface of the disturbance guide wheel 4 is treated with anti-corrosion to improve its service life and reliability. The anti-corrosion treatment can be electroplating, spraying anti-corrosion paint, etc. to form a protective layer to isolate corrosion factors such as air and moisture.

[0038] The rotor 3 of the present invention can be used in both forward and reverse rotations, and can press out impurities remaining in the second flow channel 8 by forward and reverse rotations, thereby effectively preventing impurities from remaining in the second flow channel 8. The present invention achieves effective separation of impurities and fluids through the design of the disturbance guide wheel 4 and the flow channel.

[0039] The present invention drives the rotor 3, the propeller and the disturbance guide wheel 4 to rotate simultaneously through the rotor 3 motor, and has a compact structure, saves space, has high efficiency and low energy consumption. In addition, the disturbance guide wheel 4 can further improve the flow field of the flow channel 7, so as to improve the propulsion efficiency and reduce the noise.

[0040] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements, modifications or changes can be made, and the above technical features can be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A rim motor, characterized in that: It includes a motor housing, a stator assembly and a rotor assembly, wherein the stator assembly is arranged at both ends of the motor housing, the rotor assembly is arranged on the stator assembly through bearings, the rotor assembly is located on the inner side of the stator assembly, the rotor assembly is provided with blades, the blades and the inside of the motor housing form a flow channel for liquid flow, the rotor assembly includes a rotor and a rotor motor, the rotor is provided with a disturbance guide wheel, and the rotor motor is used to drive the rotor, the disturbance guide wheel and the blades to rotate.

2. The rim motor according to claim 1, characterized in that: The cross-sectional shape of the flow channel 1 is approximately a double inverse ellipse.

3. The rim motor according to claim 2, characterized in that: The flow channel-area relationship is as follows: S=Z / 360×π×(R 2 / -r 2 / )-π×a×(R-r) 2 Where, S: flow channel area, unit: mm 2 ; R: outer diameter of the guide wheel, unit: mm; r: inner diameter of the flow channel, unit: mm; Z: number of flow channels; a, disturbance coefficient (related to flow velocity).

4. The rim motor according to claim 1, characterized in that: The disturbance guide wheel is provided with a helix angle θ along the circumferential direction.

5. The rim motor according to claim 4, characterized in that: The helix angle θ ranges from 35° to 55°.

6. The rim motor according to claim 1, characterized in that: The outer contour of the disturbance guide wheel is provided with a flow channel 2 which is spaced apart from the flow channel 1 along the circumference of the disturbance guide wheel, and the impurities in the flow channel 1 enter into the flow channel 2 and are discharged.

7. The rim motor according to claim 6, characterized in that: The side wall of the second flow channel is provided with an elliptical arc groove.

8. The rim motor according to claim 1, characterized in that: The disturbance guide wheel and the rotor are connected by double keys.

9. The rim motor according to claim 1, characterized in that: The disturbance guide wheel is made of magnetically insulating material, and the surface of the disturbance guide wheel is treated for corrosion resistance.

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