Air-cooled motor

Abstract

The invention relates to the technical field of motors, in particular to an air-cooled motor, which comprises an inner wind driving assembly, an outer wind driving assembly, a rotor, a stator, an end cover, a bearing outer cover and a bearing, a rotor core is provided with a rotor core ventilating duct, and the outer surface of a base is provided with radiating fins and a W-shaped radiating air duct. The air flow inside the motor is sucked in from the supercharging non-return device, is driven by the rotor iron core ventilating duct, the guide device and the wind collecting wheel to flow to the W-shaped heat dissipation air duct for heat dissipation, and then returns to the supercharging non-return device for recycling; air flow outside the motor is sucked in from the air inlet of the fan cover, and the fan drives the air flow to flow to the pressurization air guide shell, the air outlet of the rear end cover, the cooling fins and the outer side of the W-shaped cooling air channel. The motor air cooling system manufactured by adopting the technical scheme is simple, low in cost and uniform in heat dissipation, solves the problem that the temperature of a coil at the shaft extension end of the motor and the internal temperature of a bearing at the shaft extension end are high by optimizing the circulation of the inner air path and enhancing the air pressure of the outer air path, and further improves the performance of the air cooling motor.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to an air-cooled motor. Background Art

[0002] At present, there are three main technical routes for motor thermal management technology, namely air cooling, liquid cooling, and air-liquid composite cooling. These three technical routes have their own advantages. The air cooling system has the advantages of simple structure, high reliability and low cost. It is mainly used in small-power motors with low heat generation and high reliability requirements. Therefore, the air cooling system has been widely used in the field of low-power motor heat dissipation due to its advantages of low cost, high reliability and easy installation. The cooling efficiency of the air cooling system is mainly determined by factors such as fin structure parameters, gas channel distribution position, gas flow, cooling medium and casing surface thermal radiation rate. In order to improve the comprehensive advantages of air-cooled motors among several cooling types of motors, motor research institutes and motor manufacturers that use air cooling technology to develop and produce motors must increase innovation in motor air cooling technology to develop air-cooled motors that satisfy customers. Summary of the invention

[0003] In view of the deficiencies in the prior art and products, the purpose of the present invention is to provide an air-cooled motor to overcome the problems raised in the background technology, thereby developing and manufacturing a motor that meets the requirements of the background technology.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows: an air-cooled motor comprises an inner air-driving assembly, an outer air-driving assembly, a rotor, a stator, an end cover, a bearing outer cover, and a bearing; The rotor is composed of a rotor winding, a rotor core, and a motor shaft assembly. The motor shaft assembly is provided with an axial extension end and a rotor core shaft seat. A star through hole and a planetary through hole are provided on the cross section of the rotor core. The planetary through holes are provided with a plurality of holes and all of them are ventilation passages for the rotor core. The ends of the planetary through holes far from the axial extension are the air inlets of the rotor core, and the ends of the planetary through holes near the axial extension are the air outlets of the rotor core. The motor shaft assembly is inserted into the star through holes from the axial extension end and matched with the rotor core shaft seat. The stator is composed of a stator core with windings and a machine base. The stator core with windings is composed of stator windings and a stator core. The stator windings are installed on the stator core, and the stator core is installed in the machine base. The outer surface of the machine base is provided with heat dissipation fins and W-shaped heat dissipation ducts. There are multiple W-shaped heat dissipation ducts arranged in an axial direction. The W-shaped heat dissipation duct is provided with a machine base inner wall air inlet and a machine base inner wall air outlet. The machine base inner wall air inlet and the machine base inner wall air outlet are respectively arranged at two ends of the W-shaped heat dissipation duct. The machine base inner wall air inlet and the machine base inner wall air outlet are both arranged on the inner wall of the machine base. The machine base inner wall air inlet is arranged near the shaft extension end, and the machine base inner wall air outlet is arranged far from the shaft extension end. The end covers are provided with two, one is a front end cover, and the other is a rear end cover. The front end of the base is fixedly connected to the front end cover, and the rear end of the base is fixedly connected to the rear end cover. The shaft holes of the front end cover and the rear end cover are provided with the bearings, and the bearings are respectively sleeved on the two end journals of the motor shaft assembly. The bearing outer cover is installed on the side of each end cover facing away from the base. The inner wind driving assembly is composed of a guide device, a wind collecting wheel, and a pressure-boosting check device. The guide device is adjacent to the rotor core, the guide device is fixedly connected to the motor shaft assembly, the guide device is located between the rotor core and the front end cover, the wind collecting wheel is adjacent to the guide device, the wind collecting wheel is fixedly connected to the motor shaft assembly and is located between the guide device and the front end cover, and the pressure-boosting check device is fixedly connected to the motor shaft assembly and is located between the rotor core and the rear end cover; The external wind drive component consists of a fan, a boost air guide shell, and a wind cover. The fan is fixedly connected to the non-extended end of the motor shaft assembly and is located outside the rear end cover. The boost air guide shell is fixedly connected to the wind cover and is located inside the wind cover. The wind cover is fixedly connected to the rear end cover.

[0005] In the air-cooled motor described in the present invention, the rotor core is provided with six rotor core ventilation ducts, each of the rotor core ventilation ducts is conical in the axial direction, the diameter of the rotor core air inlet is larger than the diameter of the rotor core air outlet, and the distance between each rotor core air inlet and the central axis of the motor shaft assembly is smaller than the distance between the rotor core air outlet and the central axis of the motor shaft assembly.

[0006] In the air-cooled motor described in the present invention, six W-shaped heat dissipation ducts are provided and evenly distributed on the same circumference, the double openings of the W-shape face away from the base, and the W-shaped heat dissipation ducts are only connected to the inside of the motor.

[0007] In the air-cooled motor described in the present invention, the rear end cover is provided with 12 fixing holes and 12 rear end cover air outlets, the fixing holes are used for connecting the rear end cover with the base, and the wind cover completely covers the rear end cover air outlets.

[0008] In the air-cooled motor described in the present invention, the cooling air flow direction of the motor's internal ventilation and heat dissipation system is sucked in from the boost check device, passes through the rotor core air inlet, the rotor core ventilation duct, the rotor core air outlet, and the guide device, and is driven by the wind collecting wheel to flow to the base inner wall air inlet, the W-shaped heat dissipation duct, the base inner wall air outlet, and the boost check device; the cooling air flow direction of the motor's external ventilation and heat dissipation system is sucked in from the wind cover air inlet, driven by the fan to flow to the boost air guide shell, passes through the rear end cover outlet, and flows to the cooling fins and the outside of the W-shaped heat dissipation duct.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: the motor air cooling system manufactured by adopting this technical solution is simple, low-cost, and has uniform heat dissipation. By optimizing the circulation of the inner air path and enhancing the wind pressure of the outer air path, the problems of high coil temperature at the motor shaft extension end and high internal temperature of the shaft extension end bearing are solved, thereby further improving the performance of the air-cooled motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic diagram of the structure of the air-cooled motor of the present invention; Figure 2 It is a schematic diagram of the internal and external airflow routes of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the motor at the air inlet of the rotor core of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the motor at the air outlet of the rotor core of the present invention; Figure 5 It is the right view of the rear end cover of the present invention.

[0011] The corresponding names of the reference numerals in the accompanying drawings are as follows: Motor shaft assembly, 2-rotor winding, 3-rotor core, 4-stator core with winding, 5-machine base, 6-bearing outer cover, 7-bearing, 8-front cover, 9-rear cover, 10-boost air guide shell, 11-fan, 12-wind cover, 20-wind collecting wheel, 21-guide device, 22-boost check device, 30-internal air flow direction, 31-external air flow direction, 51-front end of machine base, 52-cooling fins, 53-air inlet on the inner wall of machine base, 54-W-type heat dissipation duct, 55-air outlet on the inner wall of machine base, 91-fixing hole, 92-rear cover outlet, 301-rotor core ventilation duct, 302-rotor core air inlet, 303-rotor core outlet. DETAILED DESCRIPTION

[0012] In order to further explain the technical means and effects adopted by the present invention to achieve the above-mentioned purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described in the present invention are only used to explain the present invention and are not used to limit the present invention.

[0013] like Figures 1 to 5The air-cooled motor of the embodiment of the present invention shown in the figure comprises an inner wind drive component, an outer wind drive component, a rotor, a stator, an end cover, a bearing outer cover 6, and a bearing 7; the rotor is composed of a rotor winding 2, a rotor core 3, and a motor shaft assembly 1, the motor shaft assembly 1 is provided with an axial extension end and a rotor core shaft seat, a star through hole and a planetary through hole are provided on the cross section of the rotor core 3, a plurality of the planetary through holes are provided and all of them are rotor core ventilation ducts 301, the far end of the planetary through hole from the axial extension is the rotor core air inlet 302, the near end of the planetary through hole from the axial extension is the rotor core air outlet 303, the motor shaft assembly 1 is inserted into the star through hole from the axial extension end and cooperates with the rotor core shaft seat; the The stator is composed of a winding stator core 4 and a machine base 5. The winding stator core 4 is composed of a stator winding and a stator core. The stator winding is installed on the stator core, and the stator core is installed in the machine base 5. The machine base 5 is provided with a heat dissipation fin 52 and a W-shaped heat dissipation duct 54 on the outside. The W-shaped heat dissipation duct 54 is provided with a plurality of axially arranged W-shaped heat dissipation ducts. The W-shaped heat dissipation duct 54 is provided with a machine base inner wall air inlet 53 and a machine base inner wall air outlet 55. The machine base inner wall air inlet 53 and the machine base inner wall air outlet 55 are respectively arranged at both ends of the W-shaped heat dissipation duct 54. The machine base inner wall air inlet 53 and the machine base inner wall air outlet 55 are both arranged on the inner wall of the machine base 5. The machine base inner wall air inlet 53 is arranged near The shaft extension end, the air outlet 55 on the inner wall of the base is arranged at the far end of the shaft extension; the end cover is provided with two, one is the front end cover 8, and the other is the rear end cover 9, the front end 51 of the base is fixedly connected to the front end cover 8, and the rear end of the base is fixedly connected to the rear end cover 9, the shaft holes of the front end cover 8 and the rear end cover 9 are provided with the bearing 7, the bearing 7 is respectively sleeved on the two end journals of the motor shaft assembly 1, and the side of each end cover facing away from the base 5 is provided with the bearing outer cover 6; the inner wind drive assembly is composed of a guide device, a wind collecting wheel, and a boost check device, the guide device 21 is adjacent to the rotor core 3, the guide device 21 is fixedly connected to the motor shaft assembly 1, the guide device The device 21 is located between the rotor core 3 and the front end cover 8, the wind collecting wheel 20 is adjacent to the guide device 21, the wind collecting wheel 20 is fixedly connected to the motor shaft assembly 1 and is located between the guide device 21 and the front end cover 8, the boost check device 22 is fixedly connected to the motor shaft assembly 1 and is located between the rotor core 3 and the rear end cover 9; the external wind driving component is composed of a fan 11, a boost air guide shell 10, and a wind cover 12, the fan 11 is fixedly connected to the non-axial extension end of the motor shaft assembly 1 and is located on the outside of the rear end cover 9, the boost air guide shell 10 is fixedly connected to the wind cover 12 and is located inside the wind cover 12, and the wind cover 12 is fixedly connected to the rear end cover 9.

[0014] like Figures 1 to 4As shown, in this embodiment, the rotor core 3 is provided with six rotor core ventilation ducts 301, each of the rotor core ventilation ducts 301 is tapered in the axial direction, the diameter of the rotor core air inlet 302 is larger than the diameter of the rotor core air outlet 303, and the distance between each rotor core air inlet 302 and the central axis of the motor shaft assembly 1 is smaller than the distance between the rotor core air outlet 303 and the central axis of the motor shaft assembly 1.

[0015] like Figures 1 to 4 As shown, in this embodiment, six W-shaped heat dissipation ducts 54 are provided and evenly distributed on the same circumference, the double openings of the W-shape face away from the base 5, and the W-shaped heat dissipation ducts 54 are only connected to the inside of the motor.

[0016] like Figure 1 , Figure 2 , Figure 5 As shown, in this embodiment, the rear end cover 9 is provided with 12 fixing holes 91 and 12 rear end cover air outlets 92 , the fixing holes 91 are used for connecting the rear end cover 9 with the base 5 , and the wind cover 12 completely covers the rear end cover air outlets 92 .

[0017] like Figure 2 As shown, in this embodiment, the cooling air flow direction of the internal ventilation and heat dissipation system of the motor is sucked in from the boost check device 22, passes through the rotor core air inlet 302, the rotor core ventilation duct 301, the rotor core air outlet 303, and the guide device 21, and is driven by the wind collecting wheel 20 to flow to the inner wall air inlet 53 of the base, the W-shaped heat dissipation duct 54, the inner wall air outlet 55 of the base, and the boost check device 22; the cooling air flow direction of the external ventilation and heat dissipation system of the motor is sucked in from the air inlet of the wind cover 12, and is driven by the fan 11 to flow to the boost air guide shell 10, passes through the rear end cover air outlet 92, and flows to the heat dissipating fins 52 and the outside of the W-shaped heat dissipation duct 54.

[0018] The above-mentioned Figures 1 to 5 The embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent or similar changes made based on the principles, shapes, and structures of the present invention should be included in the protection scope of the present invention.

Claims

1. An air-cooled motor, characterized in that: It includes an inner wind driving component, an outer wind driving component, a rotor, a stator, an end cover, a bearing outer cover, and a bearing; The rotor is composed of a rotor winding, a rotor core, and a motor shaft assembly. The motor shaft assembly is provided with an axial extension end and a rotor core shaft seat. A star through hole and a planetary through hole are provided on the cross section of the rotor core. The planetary through holes are provided with a plurality of holes and all of them are ventilation passages for the rotor core. The ends of the planetary through holes far from the axial extension are the air inlets of the rotor core, and the ends of the planetary through holes near the axial extension are the air outlets of the rotor core. The motor shaft assembly is inserted into the star through holes from the axial extension end and matched with the rotor core shaft seat. The stator is composed of a stator core with windings and a machine base. The stator core with windings is composed of stator windings and a stator core. The stator windings are installed on the stator core, and the stator core is installed in the machine base. The outer surface of the machine base is provided with heat dissipation fins and W-shaped heat dissipation ducts. There are multiple W-shaped heat dissipation ducts arranged in an axial direction. The W-shaped heat dissipation duct is provided with a machine base inner wall air inlet and a machine base inner wall air outlet. The machine base inner wall air inlet and the machine base inner wall air outlet are respectively arranged at two ends of the W-shaped heat dissipation duct. The machine base inner wall air inlet and the machine base inner wall air outlet are both arranged on the inner wall of the machine base. The machine base inner wall air inlet is arranged near the shaft extension end, and the machine base inner wall air outlet is arranged far from the shaft extension end. The end covers are provided with two, one is a front end cover, and the other is a rear end cover. The front end of the base is fixedly connected to the front end cover, and the rear end of the base is fixedly connected to the rear end cover. The shaft holes of the front end cover and the rear end cover are provided with the bearings, and the bearings are respectively sleeved on the two end journals of the motor shaft assembly. The bearing outer cover is installed on the side of each end cover facing away from the base. The inner wind driving assembly is composed of a guide device, a wind collecting wheel, and a pressure-boosting check device. The guide device is adjacent to the rotor core, the guide device is fixedly connected to the motor shaft assembly, the guide device is located between the rotor core and the front end cover, the wind collecting wheel is adjacent to the guide device, the wind collecting wheel is fixedly connected to the motor shaft assembly and is located between the guide device and the front end cover, and the pressure-boosting check device is fixedly connected to the motor shaft assembly and is located between the rotor core and the rear end cover; The external wind drive component consists of a fan, a boost air guide shell, and a wind cover. The fan is fixedly connected to the non-extended end of the motor shaft assembly and is located outside the rear end cover. The boost air guide shell is fixedly connected to the wind cover and is located inside the wind cover. The wind cover is fixedly connected to the rear end cover.

2. The air-cooled motor according to claim 1, characterized in that: The rotor core is provided with six rotor core ventilation ducts, each of which is tapered in the axial direction, the diameter of the rotor core air inlet is larger than the diameter of the rotor core air outlet, and the distance between each rotor core air inlet and the central axis of the motor shaft assembly is smaller than the distance between the rotor core air outlet and the central axis of the motor shaft assembly.

3. The air-cooled motor according to claim 1, characterized in that: The W-shaped heat dissipation air ducts are provided with 6 and are evenly distributed on the same circumference, the double openings of the W-shape face away from the machine base, and the W-shaped heat dissipation air ducts are only communicated with the inside of the motor.

4. The air-cooled motor according to claim 1, characterized in that: The rear end cover is provided with 12 fixing holes and 12 rear end cover air outlets, the fixing holes are used for connecting the rear end cover with the machine base, and the wind cover completely covers the rear end cover air outlets.

5. The air-cooled motor according to claim 1, characterized in that: The cooling airflow direction of the internal ventilation and heat dissipation system of the motor is sucked in from the boost check device, passes through the rotor core air inlet, the rotor core ventilation duct, the rotor core air outlet, and the guide device, and is driven by the wind collecting wheel to flow to the inner wall air inlet of the base, the W-shaped heat dissipation duct, the inner wall air outlet of the base, and the boost check device; the cooling airflow direction of the external ventilation and heat dissipation system of the motor is sucked in from the wind cover air inlet, driven by the fan to flow to the boost air guide shell, passes through the rear end cover outlet, and flows to the cooling fins and the outside of the W-shaped heat dissipation duct.

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