Motor cooling system

Abstract

The utility model belongs to the technical field of motor heat dissipation, specifically, a motor cooling system, comprising a casing, a lower end cover and an upper end cover are installed on the casing, a stator core is installed on the inner wall of the casing, a stator coil is installed on the stator core, a rotor core is installed in the casing, a guide plate is installed in the casing, and ventilation channels are arranged on the upper end cover and the lower end cover; a bracket is arranged in the casing, the stator core is installed on the bracket, a ventilation gap is provided between the stator core and the inner wall of the casing, the rotating shaft is a hollow shaft, and airflow passes through the rotating shaft; the guide plate comprises a lower plate and an upper plate, the lower plate is installed in the lower end cover, the upper plate is installed in the upper end cover, and the lower plate in the lower end cover will not completely cover the ventilation channel; the utility model has a simple structure, can guide the airflow to dissipate heat to the components in the casing along different paths at the same time, and improve the cooling effect of the motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor heat dissipation, in particular to a motor cooling system. Background Art

[0002] At present, high-power density motors and high electromagnetic load motors generate serious heat due to their high electromagnetic load and large losses. In actual operation, there are strict requirements on the temperature rise of the motors. Therefore, it is necessary to improve the cooling structure to improve the heat dissipation efficiency. However, not all motors can adopt water cooling, oil cooling or special internal cooling structures.

[0003] Existing motors have various cooling structures, including a method of conducting the heat inside the motor to the surface of the motor base through an internal cooling air path for heat dissipation, designing heat dissipation ribs on the surface of the base to conduct the heat inside the motor to the surface of the motor base, and then dissipating the heat through the heat dissipation ribs on the surface of the base, or directly dissipating the heat from the surface of the base.

[0004] When no effective heat dissipation measures are taken or when heat dissipation measures are taken but the heat dissipation efficiency is low, heat accumulates inside the motor and the motor base. The motor base has a slow cooling speed and poor heat dissipation effect, and the temperature easily rises, resulting in heat accumulation inside the motor, causing the motor temperature to be too high, affecting the normal and safe operation of the motor. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, guide the airflow along different paths to dissipate heat to the internal components of the casing at the same time, and improve the cooling effect of the motor, the utility model proposes a motor cooling system.

[0006] The utility model solves the technical problem by adopting the following technical solution: the utility model discloses a motor cooling system, comprising a casing, a lower end cover and an upper end cover are installed on the casing, a stator core is installed on the inner wall of the casing, a stator coil is installed on the stator core, a rotor core is installed in the casing, a guide plate is installed in the casing, and ventilation channels are provided on the upper end cover and the lower end cover;

[0007] A bracket is arranged in the casing, the stator core is mounted on the bracket, a ventilation gap exists between the stator core and the inner wall of the casing, the rotating shaft is a hollow shaft, and air flows through the rotating shaft;

[0008] The guide plate includes a lower plate and an upper plate, wherein the lower plate is installed in the lower end cover, and the upper plate is installed in the upper end cover, and the lower plate in the lower end cover will not completely cover the ventilation channel.

[0009] Preferably, two ends of the stator coil extend beyond two end surfaces of the stator core, the ends of the stator coil are inclined toward the housing, and the surface of the stator coil is covered with insulating paper.

[0010] Preferably, the ventilation channel on the upper end cover is in an inverted U shape, and the outlet direction of the ventilation channel on the upper end cover is perpendicular to the rotating shaft.

[0011] Preferably, the lower plate is hollow inside, and external cooling liquid is introduced into the guide plate.

[0012] Preferably, heat pipes are installed in the side walls of the guide plate, the heat pipes are evenly distributed around the center line of the guide plate, and the heat pipes are close to the side of the guide plate that contacts the airflow.

[0013] Preferably, a baffle is installed on the surface of the guide plate, the baffle guides the airflow in different directions, and the baffle is located on the surface of the guide plate that contacts the airflow.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The motor cooling system described in the utility model is configured with a lower end cover, an upper end cover and a guide plate to divert and guide the airflow entering the casing, so that the airflow passes through the ventilation gap between the casing and the stator core and the gap between the stator core and the rotor core at the same time to dissipate the heat in the motor. At the same time, the airflow passing through the shaft is used to dissipate the heat inside the rotor core, so that the heat inside the motor is taken away by the airflow through multiple paths at the same time, thereby improving the cooling effect of the motor.

[0016] 2. The motor cooling system described in the utility model, by setting a cavity, a heat pipe and a baffle, allows the airflow to fully contact and exchange heat with the guide plate, so that the temperature of the airflow entering the casing is lower, thereby improving the cooling effect on the motor, and liquid cooling of the motor is practiced through the guide plate, avoiding the setting of complex cooling channels, thereby reducing the difficulty of motor design and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the motor equipped with a cooling system in the utility model; wherein the arrow indicates the direction of air flow movement;

[0019] Figure 2 It is a structural schematic diagram of the guide plate inside the motor in the utility model;

[0020] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0021] In the figure: casing 1, lower end cover 11, upper end cover 12, stator core 2, stator coil 21, shaft 3, rotor core 31, guide plate 4, lower plate 41, upper plate 42, cavity 43, heat pipe 44, baffle 45. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 3 As shown, the motor cooling system of the utility model comprises a casing 1, a lower end cover 11 and an upper end cover 12 are installed on the casing 1, a stator core 2 is installed on the inner wall of the casing 1, a stator coil 21 is installed on the stator core 2, a rotor core 31 is installed in the casing 1, a guide plate 4 is installed in the casing 1, and ventilation channels are provided on the upper end cover 12 and the lower end cover 11;

[0024] A bracket is provided in the casing 1, the stator core 2 is mounted on the bracket, a ventilation gap exists between the stator core 2 and the inner wall of the casing 1, the rotating shaft 3 is a hollow shaft, and air flows through the rotating shaft 3;

[0025] The guide plate 4 includes a lower plate 41 and an upper plate 42. The lower plate 41 is installed in the lower end cover 11, and the upper plate 42 is installed in the upper end cover 12. The lower plate 41 in the lower end cover 11 will not completely cover the ventilation channel.

[0026] When the motor is running, the blades arranged on the rotor core 31 will drive the air flow in the housing 1, so that the outside air enters the housing 1 from the ventilation channel on the lower end cover 11 and leaves from the ventilation channel on the upper end cover 12, so as to take away the internal heat of the motor and dissipate heat and cool the motor;

[0027] At the same time, when the air flows in the casing 1, since the lower plate 41 will not completely cover the ventilation channel, the air entering the ventilation channel of the lower end cover 11 will be separated and guided by the guide plate 4, so that the air is divided into two relatively independent airflows, one of which will pass through the ventilation gap between the casing 1 and the stator core 2 to ventilate, dissipate heat and cool the outer wall of the casing 1 and the stator core 2, and the other airflow will pass through the gap between the stator core 2 and the rotor core 31 to ventilate, dissipate heat and cool the inner wall of the stator core 2 and the rotor core 31, so as to dissipate heat and cool different components in the motor at the same time, accelerate heat dissipation, and improve the cooling effect of the motor;

[0028] At the same time, since the rotating shaft 3 is a hollow shaft, the outside air can pass through the inside of the rotating shaft 3. Therefore, when the blades on the rotor core 31 drive the air to flow, the inlet on the rotating shaft 3 near the lower end cover 11 will be affected by the air flow, and air will enter and be discharged from the outlet at the upper end of the rotating shaft 3, or the outside ventilation airflow and natural flow airflow will enter from the inlet at the lower end of the rotating shaft 3, thereby dissipating the heat inside the rotating shaft 3 and the rotor core 31, further improving the heat dissipation effect inside the motor, avoiding heat accumulation inside the motor, and causing overheating and damage to the motor.

[0029] As an embodiment of the present invention, both ends of the stator coil 21 extend beyond the two end surfaces of the stator core 2, the ends of the stator coil 21 are inclined toward the housing 1, and the surface of the stator coil 21 is covered with insulating paper;

[0030] By setting the shapes of the two ends of the stator coil 21, the airflow separated and guided by the guide plate 4 can be further guided and directed, so that this part of the airflow can enter the gap between the rotor core 31 and the stator core 2, and avoid the gap between the rotor core 31 and the stator core 2 being too small, which affects the entry and passage of the airflow, and the end of the stator coil 21 is made to contact with the airflow, so as to dissipate the heat at the end of the stator coil 21;

[0031] At the same time, insulating paper is installed on the surface of the stator coil 21 to further protect the stator coil 21 and prevent the insulating layer on the surface of the stator coil 21 from being damaged. At the same time, after being covered with insulating paper, the part of the stator coil 21 protruding outside the stator core 2 will be relatively smooth and flat, which facilitates the airflow to pass along the surface of the end of the stator coil 21 and avoids affecting the flow of air.

[0032] As an embodiment of the utility model, the ventilation channel on the upper end cover 12 is in an inverted U shape, and the outlet direction of the ventilation channel on the upper end cover 12 is perpendicular to the rotating shaft 3;

[0033] When the airflow in the casing 1 reaches the upper end cover 12, the airflow will be guided by the upper plate 42, so that the airflow is relatively gathered before entering the ventilation channel. Through the gathering of the airflow, the upper ends of the stator core 2, the stator coil 21, and the rotor core 31 are contacted, dissipated, and cooled again, thereby further improving the heat dissipation and cooling effect of the motor. At the same time, by adjusting the shape and outlet direction of the ventilation channel on the upper end cover 12, the direction of the airflow in the casing 1 is changed, thereby increasing the contact area between the airflow and the internal parts of the motor, thereby improving the heat dissipation effect of the motor.

[0034] As an implementation mode of the utility model, the lower plate 41 is hollow inside, and the guide plate 4 is passed through the external cooling liquid;

[0035] When the airflow passes through the lower plate 41, the temperature of the surface of the guide plate 4 is relatively low due to the coolant introduced, so that heat exchange is performed between the guide plate 4 and the airflow, the temperature of the passing airflow is reduced, and the airflow with a lower temperature enters the interior of the motor to dissipate the heat in the motor, thereby improving the cooling effect of the motor;

[0036] At the same time, the liquid cooling effect is achieved through the lower plate 41, and complex liquid cooling channels are designed inside the casing 1, the stator core 2 or the rotor core 31 to make the motor adapt to liquid cooling, thereby producing a liquid cooling effect on the motor without increasing the difficulty of design and production too much, thereby improving the cooling effect of the motor. At the same time, under permitted conditions, the upper end cover 12 and the end cover of the motor can be replaced to transform the ordinary motor, so that the motor can achieve liquid cooling effect and reduce the cost of use and transformation.

[0037] As an embodiment of the utility model, a heat pipe 44 is installed in the side wall of the guide plate 4, and the heat pipe 44 is evenly distributed around the center line of the guide plate 4, and the heat pipe 44 is close to the side of the guide plate 4 in contact with the airflow;

[0038] By arranging a heat pipe 44 in the guide plate 4, the heat pipe 44 is used to balance the temperature of the surface of the guide plate 4, thereby improving the heat exchange effect between the airflow and the guide plate 4, ensuring that the temperature of the airflow entering the casing 1 is relatively low, improving the dissipation of heat in the motor, and thus ensuring a good cooling effect on the motor.

[0039] As an embodiment of the utility model, a baffle 45 is installed on the surface of the guide plate 4, and the baffle 45 guides the airflow in different directions. The baffle 45 is located on the surface of the guide plate 4 that contacts the airflow;

[0040] When the airflow passes through the surface of the guide plate 4, the baffle 45 will guide and disturb the airflow, causing the airflow to form turbulence, thereby increasing the contact area and contact time between the airflow and the surface of the guide plate 4, improving the effect of heat exchange between the airflow and the guide plate 4, and further improving the effect of cooling the motor.

[0041] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A motor cooling system, comprising a casing (1), a lower end cover (11) and an upper end cover (12) being mounted on the casing (1), a stator core (2) being mounted on the inner wall of the casing (1), a stator coil (21) being mounted on the stator core (2), a rotor core (31) being mounted in the casing (1), a guide plate (4) being mounted in the casing (1), and ventilation channels being arranged on the upper end cover (12) and the lower end cover (11); Features: A bracket is provided in the casing (1), the stator core (2) is mounted on the bracket, a ventilation gap exists between the stator core (2) and the inner wall of the casing (1), the rotating shaft (3) on the rotor core (31) is a hollow shaft, and air flows through the rotating shaft (3); The guide plate (4) comprises a lower plate (41) and an upper plate (42); the lower plate (41) is installed in the lower end cover (11), and the upper plate (42) is installed in the upper end cover (12); the lower plate (41) in the lower end cover (11) will not completely cover the ventilation channel.

2. A motor cooling system according to claim 1, characterized in that: The two ends of the stator coil (21) extend beyond the two end surfaces of the stator core (2), the ends of the stator coil (21) are inclined toward the housing (1), and the surface of the stator coil (21) is covered with insulating paper.

3. The motor cooling system according to claim 1, characterized in that: The ventilation channel on the upper end cover (12) is in an inverted U shape, and the outlet direction of the ventilation channel on the upper end cover (12) is perpendicular to the rotating shaft (3).

4. The motor cooling system according to claim 1, characterized in that: The lower plate (41) is hollow inside, and external cooling liquid is introduced into the guide plate (4).

5. A motor cooling system according to claim 4, characterized in that: A heat pipe (44) is installed in the side wall of the guide plate (4); the heat pipe (44) is evenly distributed around the center line of the guide plate (4); and the heat pipe (44) is close to the side of the guide plate (4) in contact with the airflow.

6. A motor cooling system according to claim 5, characterized in that: A baffle (45) is installed on the surface of the guide plate (4), and the baffle (45) guides the airflow in different directions. The baffle (45) is located on the surface of the guide plate (4) that contacts the airflow.

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