Internal circulation oil-filled motor

Abstract

The utility model relates to the technical field of motors, in particular to an internal circulation oil-filled motor, which comprises a motor cylinder, a stator component arranged inside the motor cylinder, a main shaft arranged in the middle inside the motor cylinder, a rotor component mounted on the outer side of the main shaft, and an upper end plate and a lower end plate respectively mounted at the upper end and the lower end of the rotor component. According to the internal-circulation oil-filled motor, the heat dissipation problem of the motor in high-performance operation is effectively solved through the skillfully designed oil internal circulation system. Oil liquid starts from the lower end of the main shaft, flows through the lower end plate, enters the gap between the rotor component and the stator component, then rises to the motor upper cavity, flows back to the motor lower cavity through the gap between the stator component and the motor cylinder and finally returns to the lower end of the main shaft, and a closed-loop inner circulation path is formed. The design not only ensures the uniform distribution of the internal temperature of the motor, but also greatly improves the heat dissipation efficiency, thereby prolonging the service life of the motor and improving the operation stability of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to an internal circulation oil-filled motor. Background Technology

[0002] In the field of motor technology, with the continuous improvement of motor performance requirements, the problem of motor heat dissipation has become increasingly prominent. Traditional motor heat dissipation methods often rely on external cooling systems or natural air cooling. However, these methods may not be able to meet the heat dissipation needs of the motor under certain operating conditions, resulting in uneven temperature distribution inside the motor and affecting the motor's operating efficiency and lifespan.

[0003] Especially in enclosed or semi-enclosed environments, the application of external cooling systems is limited, while natural air cooling is often ineffective. Therefore, developing a new motor structure that can effectively solve the problem of internal motor heat dissipation, ensure uniform temperature distribution, and improve heat dissipation efficiency is particularly important. Utility Model Content

[0004] The purpose of this invention is to provide an internal circulation oil-filled motor to solve the problem mentioned in the background art that traditional motor heat dissipation methods often rely on external cooling systems or natural air cooling. However, these methods may not be able to meet the heat dissipation requirements of the motor under certain operating conditions, resulting in uneven temperature distribution inside the motor and affecting the motor's operating efficiency and lifespan.

[0005] To achieve the above objectives, this utility model provides an internal circulation oil-filled motor, including a motor cylinder. A stator component is disposed inside the motor cylinder, and a main shaft is disposed in the middle of the motor cylinder. A rotor component is mounted on the outer side of the main shaft. An upper end plate and a lower end plate are respectively mounted on the upper and lower ends of the rotor component. Oil flows from the lower end of the main shaft, through the lower end plate, into the gap between the rotor component and the stator component, then rises to the upper cavity of the motor, and then flows back to the lower cavity of the motor through the gap between the stator component and the motor cylinder, finally returning to the lower end of the main shaft, forming a closed-loop internal circulation. This ensures uniform temperature distribution inside the motor and improves heat dissipation efficiency.

[0006] Preferably, the motor housing and the stator component are assembled and fixed together, and the contact surface between the stator component and the motor housing is designed with several oil grooves to allow the oil to flow back to the bottom of the motor.

[0007] Preferably, the number of oil channels is at least six.

[0008] Preferably, the rotor component is fixed to the main shaft by a flat key, a retaining washer, and a round nut. The flat key transmits torque, while the retaining washer and round nut provide a fixing function.

[0009] Preferably, the upper and lower ends of the main shaft are rotatably connected to the inner wall of the motor cylinder via deep groove ball bearings, and a thrust ball bearing is also installed at the bottom end of the main shaft and the inner wall of the motor cylinder.

[0010] Preferably, the lower end plate is provided with a centrifugal channel near the main shaft, and the bottom end of the main shaft is provided with an oil channel. The centrifugal channel is connected to the oil channel of the main shaft, and the oil can flow through the oil channel and then flow into the centrifugal channel on the lower end plate.

[0011] Preferably, the centrifugal channel of the lower end plate is inclined, forming an upward liquid channel with the inner side of the stator component. When the motor runs at high speed, centrifugal force is generated, which promotes the oil to flow upward along the liquid channel.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this internal circulation oil-filled motor, the cleverly designed internal oil circulation system effectively solves the heat dissipation problem of the motor under high-performance operation. The oil starts from the lower end of the main shaft, flows through the lower end plate and enters the gap between the rotor and stator components, then rises to the upper cavity of the motor, and then flows back to the lower cavity of the motor through the gap between the stator component and the motor cylinder, finally returning to the lower end of the main shaft, forming a closed-loop internal circulation path.

[0014] This design not only ensures a uniform temperature distribution within the motor but also significantly improves heat dissipation efficiency, thereby extending the motor's lifespan and enhancing its operational stability. Especially in enclosed or semi-enclosed environments, this internally circulating oil-filled motor achieves highly efficient internal heat dissipation without relying on an external cooling system, demonstrating significant technological advantages and application value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 A magnified view of a portion of point A in the middle;

[0017] The meanings of the labels in the diagram are as follows:

[0018] 1. Motor housing; 2. Stator assembly; 3. Rotor assembly; 4. Main shaft; 5. Lower end plate; 6. Locking washer; 7. Round nut; 8. Upper end plate; 9. Deep groove ball bearing; 10. Thrust ball bearing. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides an internal circulation oil-filled motor, such as Figures 1-2 As shown, the motor includes a motor housing 1, inside which a stator component 2 is housed. A main shaft 4 is positioned in the center of the motor housing 1, and a rotor component 3 is mounted on the outer side of the main shaft 4. An upper end plate 8 and a lower end plate 5 are respectively mounted at the upper and lower ends of the rotor component 3. Oil flows from the lower end of the main shaft 4, through the lower end plate 5, and into the gap between the rotor component 3 and the stator component 2. It then rises to the upper cavity of the motor, flows back into the lower cavity through the gap between the stator component 2 and the motor housing 1, and finally returns to the lower end of the main shaft 4, forming a closed-loop internal circulation. This ensures uniform temperature distribution within the motor and improves heat dissipation efficiency. Through its uniquely designed oil circulation path, efficient heat dissipation and uniform temperature distribution within the motor are achieved. Specifically, the oil starts from the lower end of the main shaft 4, flows smoothly through the lower end plate 5, and then enters the precision gap between the rotor component 3 and the stator component 2. During this process, the oil effectively absorbs the heat generated during motor operation. Next, under the influence of heat, the oil naturally rises to the upper cavity of the motor and cleverly flows back to the lower cavity of the motor through the gap between the stator component 2 and the motor cylinder 1, finally returning to the lower end of the main shaft 4, thus forming a complete closed-loop internal circulation system. This innovative design not only ensures that the temperature inside the motor is uniformly distributed, avoiding local overheating, but also greatly improves the motor's heat dissipation efficiency, providing a strong guarantee for the long-term stable operation of the motor.

[0021] In this embodiment, the motor cylinder 1 and the stator component 2 are assembled and fixed together. The contact surface between the stator component 2 and the motor cylinder 1 is designed with several oil grooves. These oil grooves provide a smooth return path for the oil, enabling the oil to return to the bottom of the motor efficiently, thereby enhancing the circulation efficiency of the oil and further improving the heat dissipation performance of the motor.

[0022] Specifically, there are at least six oil channels. This design not only ensures sufficient oil return, but also reduces the resistance to oil flow through the diversion effect of multiple channels, making oil circulation smoother and helping to maintain a uniform temperature distribution inside the motor.

[0023] Furthermore, the rotor assembly 3 is fixed to the main shaft 4 via a flat key, a retaining washer 6, and a round nut 7. The flat key transmits torque, while the retaining washer 6 and round nut 7 provide a fixing function. The flat key effectively transmits torque, ensuring synchronous rotation between the rotor assembly and the main shaft; while the retaining washer 6 and round nut 7 provide a reliable fixing function, preventing the rotor assembly from loosening or falling off during operation, thereby ensuring stable operation of the motor.

[0024] Furthermore, the upper and lower ends of the main shaft 4 are rotatably connected to the inner wall of the motor cylinder 1 via deep groove ball bearings 9, and a thrust ball bearing 10 is also installed between the bottom end of the main shaft 4 and the inner wall of the motor cylinder 1. This design not only reduces the frictional resistance during the rotation of the main shaft, but also improves the support stability of the main shaft. At the same time, the addition of a thrust ball bearing 10 between the bottom end of the main shaft 4 and the inner wall of the motor cylinder 1 further enhances the stability of the main shaft when subjected to axial force, ensuring the reliability and durability of the motor under high-speed operation.

[0025] Furthermore, a centrifugal channel is provided on the lower end plate 5 near the main shaft 4, and an oil channel is provided at the bottom of the main shaft 4. The centrifugal channel is connected to the oil channel of the main shaft 4, allowing oil to flow through the oil channel and then into the centrifugal channel on the lower end plate 5. This design enables the oil to flow smoothly through the oil channel and then into the centrifugal channel on the lower end plate 5, thereby achieving efficient guidance and circulation of the oil.

[0026] Furthermore, the centrifugal channel of the lower end plate 5 is inclined, forming an upward liquid channel with the inner side of the stator component 2. When the motor runs at high speed, centrifugal force is generated, promoting the upward flow of oil along the liquid channel. This enhances the circulation power of the oil and improves the heat dissipation efficiency of the motor. This design not only helps maintain a uniform temperature distribution inside the motor, but also further improves the overall performance and service life of the motor.

[0027] When the internal circulation oil-filled motor of this invention is in use, the oil first circulates from the lower end of the main shaft 4 when the motor starts working. First, the oil flows through the lower end plate 5, where a specially designed centrifugal channel connects to the oil channel at the bottom of the main shaft 4, ensuring smooth oil flow. Then, the oil enters the precision gap between the rotor component 3 and the stator component 2. During this process, the oil effectively absorbs the heat generated during motor operation, thus providing a cooling effect.

[0028] Under the influence of heat, the oil naturally rises to the upper cavity of the motor. Here, the gap between the stator component 2 and the motor cylinder 1 is cleverly utilized as a return channel for the oil. The oil flows back to the lower cavity of the motor through these gaps and eventually returns to the lower end of the main shaft 4, thus forming a complete closed-loop internal circulation system. During this circulation process, the oil not only carries away the heat inside the motor but also ensures a uniform temperature distribution inside the motor through its flow, preventing localized overheating.

[0029] Meanwhile, the oil passage design between the motor cylinder 1 and the stator component 2 provides a smooth return path for the oil, enhancing the oil circulation efficiency. With at least six oil passages, this design ensures sufficient oil return and reduces resistance during oil flow through the diversion effect of multiple channels, resulting in smoother oil circulation.

[0030] Furthermore, the fixing method between the rotor component 3 and the main shaft 4, as well as the connection design between the main shaft 4 and the motor cylinder 1, ensure stable operation and efficient heat dissipation of the motor. In particular, the inclined design of the centrifugal channel of the lower end plate 5 forms an upward liquid channel with the inner side of the stator component 2. When the motor is running at high speed, the centrifugal force generated will promote the oil to flow upward along this liquid channel, thereby enhancing the circulation power of the oil and improving the heat dissipation efficiency of the motor.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An internal circulation oil-filled motor, comprising a motor cylinder (1), characterized in that: The motor cylinder (1) is equipped with a stator component (2) inside. The motor cylinder (1) is equipped with a main shaft (4) in the middle. The rotor component (3) is installed on the outside of the main shaft (4). The upper end plate (8) and the lower end plate (5) are respectively installed at the upper and lower ends of the rotor component (3). The oil starts from the lower end of the main shaft (4), flows through the lower end plate (5), enters the gap between the rotor component (3) and the stator component (2), then rises to the upper cavity of the motor, and then flows back to the lower cavity of the motor through the gap between the stator component (2) and the motor cylinder (1), and finally returns to the lower end of the main shaft (4), forming a closed-loop internal circulation, ensuring uniform temperature distribution inside the motor and improving heat dissipation efficiency.

2. The internal circulation oil-filled motor according to claim 1, characterized in that: The motor cylinder (1) and the stator component (2) are assembled and fixed together. The contact surface between the stator component (2) and the motor cylinder (1) is designed with several oil grooves to allow the oil to flow back to the bottom of the motor.

3. The internal circulation oil-filled motor according to claim 2, characterized in that: The number of oil passages is at least six.

4. The internal circulation oil-filled motor according to claim 1, characterized in that: The rotor component (3) is fixed to the main shaft (4) by a flat key, a stop washer (6) and a round nut (7). The flat key transmits torque, and the stop washer (6) and the round nut (7) fix it in place.

5. The internal circulation oil-filled motor according to claim 1, characterized in that: The upper and lower ends of the main shaft (4) are rotatably connected to the inner wall of the motor cylinder (1) through deep groove ball bearings (9), and the bottom end of the main shaft (4) is also equipped with a thrust ball bearing (10) to the inner wall of the motor cylinder (1).

6. The internal circulation oil-filled motor according to claim 1, characterized in that: The lower end plate (5) is provided with a centrifugal channel near the main shaft (4), and the bottom end of the main shaft (4) is provided with an oil channel. The centrifugal channel is connected to the oil channel of the main shaft (4), and the oil can flow through the oil channel and then flow into the centrifugal channel on the lower end plate (5).

7. The internal circulation oil-filled motor according to claim 1, characterized in that: The centrifugal channel of the lower end plate (5) is inclined and forms an upward liquid channel with the inner side of the stator component (2). When the motor runs at high speed, it generates centrifugal force, which promotes the oil to flow upward along the liquid channel.

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