Wet and dry dual-purpose brushless motor

Abstract

The utility model provides a wet and dry brushless motor. The wet and dry brushless motor comprises an outer fan housing, an inner fan housing, a movable impeller, an oil seal, a casing, a support, a rotor assembly, a stator assembly and a positioning cover. The outer fan cover is located at one end of the machine shell, the inner fan cover is located on one side of the outer fan cover, the movable impeller is located in the inner fan cover and connected with a motor main shaft, the oil seal is located on one side of the rotor assembly, the stator assembly is located around the rotor assembly, the positioning cover is located on the other side of the machine shell, and the support is located in the machine shell and fixedly connected with the machine shell. According to the wet and dry dual-purpose brushless motor provided by the utility model, hot air in the motor and water vapor absorbed by the impeller are respectively discharged through the wet air channel and the dry air channel, dry hot air in the motor is absorbed out through negative pressure at the air port of the outer fan cover, and meanwhile, the air pressure in the motor is smaller than that in the shell, so that the motor can be conveniently cleaned. And the moisture is discharged out of the shell through the wet air duct, so that the moisture is not gathered in the shell, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to a wet and dry dual-purpose brushless motor. Background Art

[0002] At present, when traditional brushless motors are in use, due to the high-speed rotation of the rotor, high temperatures will be generated, which requires heat dissipation. At the same time, high requirements are also placed on environmental factors. If the humidity in the working environment is high, water vapor will be sucked into the motor due to the negative pressure formed by the high-speed rotation of the rotor. Since there are electronic components inside the motor, once water vapor enters, the electronic components may be damaged. Moreover, if the water vapor inside the motor cannot dissipate, it will cause corrosion of the mechanical structure and affect the service life of the motor.

[0003] Therefore, it is necessary to seal the inside of the traditional motor, or strictly require the use environment of the motor. For motor sealing, only gaskets or oil seals can be used at the internal connections of the motor. However, there are functionalities of the equipment. For example, equipment such as fans will generate suction to absorb water vapor in the environment due to their functional requirements. Even if the motor is sealed, water vapor will be brought into the motor due to the circulation of air, and the sealing effect inside the motor cannot be achieved. Utility Model Content

[0004] The utility model aims to provide a brushless motor for wet and dry use. By setting a channel inside the motor, the inhaled water vapor is discharged from the channel on the side of the motor through the air pressure difference, and the interior of the motor is sealed to achieve the purpose of wet and dry use.

[0005] To solve the above problems, the present invention provides a brushless motor for wet and dry use, which adopts the following technical solutions:

[0006] A wet and dry dual-purpose brushless motor comprises an outer wind hood, an inner wind hood, an impeller, an oil seal, a casing, a bracket, a rotor assembly, a stator assembly and a positioning cover; the outer wind hood is located at one end of the casing and is fixedly connected to the casing; the inner wind hood is located on one side of the outer wind hood and is in close contact with the outer wind hood; the impeller is located inside the inner wind hood and is connected to the motor main shaft for rotation; the oil seal is located on one side of the rotor assembly and seals the rotor assembly; the stator assembly is located around the rotor assembly to form a magnetic field; the positioning cover is located on the other side of the casing, on one side of the oil seal, and covers the casing; the bracket is located inside the casing and is fixedly connected to the casing.

[0007] Furthermore, connecting ribs are provided on the outer wall of the inner air hood, and the connecting ribs are connected to the outer air hood to form a wet air duct.

[0008] Furthermore, the wet air duct extends outward between the outer side of the bracket and the shell, and outputs the water vapor sucked into the motor to the outside of the shell.

[0009] Furthermore, the bracket and the housing are connected via sealant.

[0010] Furthermore, a gap is provided in the side wall of the casing, and the gap forms an air duct connecting the interior of the motor and the outer air hood opening.

[0011] Furthermore, the drying air duct extends inward from the through hole on the positioning cover, extends to the inside of the motor through the bracket, and then is connected to the air outlet of the outer air hood through the gap in the side wall of the casing.

[0012] Furthermore, the bracket carries the stator assembly of the motor and is connected to the side wall of the casing.

[0013] Furthermore, the air outlet of the outer hood forms a negative pressure during operation, absorbing air from the outside to the inside. The airflow inside the motor is continuously sucked out due to the negative pressure, forming a dry and cooling airflow. At the same time, water vapor flows out along the side of the inner hood. Because the air is continuously absorbed inside the motor and the air pressure is lower than that outside, water vapor cannot flow into the motor, but flows out of the casing through the side, thereby achieving water vapor sealing.

[0014] The beneficial effect of the present invention is that the present invention provides a wet and dry dual-purpose brushless motor, which discharges the hot air inside the motor and the water vapor absorbed by the impeller through the wet air duct and the dry air duct respectively, and sucks out the dry hot air inside the motor through the negative pressure at the air outlet of the outer wind hood. At the same time, the air pressure inside the motor is lower than that inside the casing, and the wet air duct is used to discharge moisture out of the casing, so that moisture does not accumulate inside the casing, thereby improving the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 This is the main cross-sectional view of the utility model and the airflow direction of the wet air duct.

[0016] Attachment Figure 2 This is the main cross-sectional view of the utility model and the airflow direction of the drying air duct.

[0017] Among them: 1. Outer air cover, 2. Inner air cover, 3. Impeller, 4. Oil seal, 5. Casing, 6. Bracket, 7. Rotor assembly, 8. Stator assembly, 9. Positioning cover, 10. Connecting ribs, 11. Wet air duct, 12. Dry air duct. DETAILED DESCRIPTION

[0018] In order to more clearly understand the technical solution provided by the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] As shown in the accompanying drawings, the utility model provides a wet and dry dual-purpose brushless motor, including an outer wind hood 1, an inner wind hood 2, an impeller 3, an oil seal 4, a casing 5, a bracket 6, a rotor assembly 7, a stator assembly 8 and a positioning cover 9; the outer wind hood 1 is located at one end of the casing 5 and is fixedly connected to the casing 5; the inner wind hood 2 is located on one side of the outer wind hood 1 and is tightly attached to the outer wind hood 1; the impeller 3 is located inside the inner wind hood 2, connected to the motor main shaft for rotation; the oil seal 4 is located on one side of the rotor assembly 7 to seal the rotor assembly 7; the stator assembly 8 is located around the rotor assembly 7 to form a magnetic field; the positioning cover 9 is located on the other side of the casing 5, on one side of the oil seal 4, and covers the casing 5; the bracket 6 is located inside the casing 5 and is fixedly connected to the casing 5.

[0020] Furthermore, a connecting rib 10 is provided on the outer wall of the inner air cover 2 , and the connecting rib 10 is connected to the outer air cover 1 to form a wet air duct 11 .

[0021] Furthermore, the wet air duct 11 extends outward between the outer side of the bracket 6 and the outer shell, and outputs the water vapor sucked into the motor to the outside of the casing 5.

[0022] Furthermore, the bracket 6 and the housing are connected via sealant.

[0023] Furthermore, a gap is provided in the side wall of the housing 5 , and the gap forms an air duct connecting the interior of the motor and the outer air cover 1 .

[0024] Furthermore, the drying air duct 12 extends inward from the through hole on the positioning cover 9, extends to the inside of the motor through the bracket 6, and then connects outward to the air outlet of the outer air hood 1 through the gap in the side wall of the casing 5.

[0025] Furthermore, the bracket 6 carries the stator assembly 8 of the motor and is connected to the side wall of the casing 5 outward.

[0026] Furthermore, the air outlet of the outer wind hood 1 forms a negative pressure during operation, absorbing air from the outside to the inside. The airflow inside the motor is continuously sucked out due to the negative pressure, forming a dry and cooling airflow. At the same time, water vapor flows out along the side of the inner wind hood 2. Because the air inside the motor is continuously absorbed and the air pressure is lower than that outside, the water vapor cannot flow into the motor, but flows out of the casing 5 through the side, thereby achieving a water vapor seal.

Claims

1. A wet and dry dual-purpose brushless motor, characterized in that: It includes an outer wind hood, an inner wind hood, an impeller, an oil seal, a casing, a bracket, a rotor assembly, a stator assembly and a positioning cover; the outer wind hood is located at one end of the casing and is fixedly connected to the casing; the inner wind hood is located on one side of the outer wind hood and is tightly attached to the outer wind hood; the impeller is located inside the inner wind hood and is connected to the motor main shaft for rotation; the oil seal is located on one side of the rotor assembly and seals the rotor assembly; the stator assembly is located around the rotor assembly to form a magnetic field; the positioning cover is located on the other side of the casing, on one side of the oil seal, and covers the casing; the bracket is located inside the casing and is fixedly connected to the casing.

2. A wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The outer wall of the inner wind cover is provided with connecting ribs, and the connecting ribs are connected to the outer wind cover to form a wet wind duct.

3. A wet and dry dual-purpose brushless motor according to claim 2, characterized in that: The wet air duct extends outward between the outer side of the bracket and the shell, and outputs the water vapor sucked into the motor to the outside of the shell.

4. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The bracket and the shell are connected via sealant.

5. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: A gap is provided in the side wall of the casing, and the gap forms an air duct connecting the interior of the motor and the outer air hood opening.

6. The wet and dry dual-purpose brushless motor according to claim 5, characterized in that: The drying air duct extends inward from the through hole on the positioning cover, extends to the inside of the motor through the bracket, and then is connected to the air outlet of the outer air hood through the gap in the side wall of the casing.

7. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The bracket carries the stator assembly of the motor and is connected to the side wall of the casing.

8. The wet and dry dual-purpose brushless motor according to claim 1, characterized in that: The air outlet of the outer air hood forms a negative pressure when working, absorbing air from the outside to the inside. The air flow inside the motor is continuously sucked out due to the negative pressure, forming a dry and cooling air flow. At the same time, water vapor flows out along the side of the inner air hood. Because the air inside the motor is continuously absorbed and the air pressure is lower than that outside, the water vapor cannot flow into the motor, but flows out of the casing through the side, thereby achieving water vapor sealing.

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