Air injection heat dissipation device of motor

Abstract

The utility model discloses a motor jet heat dissipation device, comprising a motor, the tail end of the motor is provided with an annular pneumatic tube, the annular pneumatic tube is distributed along the contour and is communicated with a plurality of gas nozzles, and the nozzle of each gas nozzle corresponds to the housing of the motor. The device not only can provide a better heat dissipation effect, but also can uniformly cover the heating part of the motor to avoid local overheating of the motor, can also carry out heat dissipation on any part of the motor by adjusting the annular air pressure pipe and the air spray head, can also avoid blockage of the heat dissipation device caused by environmental pollution, and is suitable for popularization and application. And the heat dissipation effect and the operation stability of the motor are improved.

Description

Technical Field

[0001] The utility model belongs to the field of motor heat dissipation devices, and more specifically belongs to the field of jet motor heat dissipation devices. Background Art

[0002] Three-phase asynchronous motors are widely used in industrial production, and a large amount of heat is generated during their operation. If heat cannot be dissipated in a timely and effective manner, the excessive temperature of the motor will lead to a decline in motor performance, a shortening of its lifespan, and even malfunction and shutdown, affecting production efficiency and equipment stability. Therefore, three-phase asynchronous motor radiators have emerged. Traditional three-phase asynchronous motor radiators are divided into air-cooled radiators and water-cooled radiators.

[0003] Traditional air-cooled radiators usually use simple methods such as blowing air with a fan or natural ventilation for heat dissipation. However, this method has some limitations. For example, the air volume and wind speed of the fan may be insufficient to evenly cover the heat-generating parts of the motor, resulting in local overheating. Moreover, most fans need to be driven by the motor shaft, increasing the load on the motor shaft. In addition, unreasonable structural design of the radiator will also affect the heat dissipation effect. The air duct design of some radiators is not smooth, with a large air resistance, reducing the air circulation efficiency. In some special working environments, such as high-temperature, high-humidity or dusty occasions, traditional air-cooled radiators are more likely to be contaminated and blocked, further weakening their heat dissipation capacity. Summary of the Invention

[0004] Purpose of the utility model: In order to overcome the deficiencies in the prior art, the utility model provides a motor jet heat dissipation device, which can not only provide better heat dissipation effect, but also evenly cover the heat-generating parts of the motor, avoid local overheating of the motor, and also avoid blockage of the radiator caused by environmental pollution, improving the heat dissipation effect and operation stability of the motor.

[0005] Technical solution: To achieve the above purpose, a motor jet heat dissipation device of the utility model includes a motor, and a circular air pressure pipe is arranged at the tail end of the motor. The circular air pressure pipe is distributed along the contour and is communicated with a number of gas nozzles, and the nozzle ports of each gas nozzle correspond to the outer shell of the motor.

[0006] Furthermore, it includes an air delivery pipe, the air outlet end of the air delivery pipe is communicated with an air delivery joint on the circular air pressure pipe, and an electromagnetic valve is arranged on the air delivery pipe.

[0007] Furthermore, the circular air pressure pipe is installed on the motor protection cover, the radius of the inner circle of the circular air pressure pipe is greater than the maximum radius of the motor protection cover; the circular air pressure pipe is coaxially arranged with the motor shaft.

[0008] Furthermore, the jet extension line of the nozzle port of the gas nozzle intersects with the circumferential surface of the motor outer shell.

[0009] Further, the angle range formed by the jet extension line and the motor rotating shaft is 5° to 30°.

[0010] Further, the motor housing is evenly divided from head to tail into a front housing section, a middle housing section, and a rear housing section, and the jet extension line of the gas nozzle jet orifice intersects with the circumferential surface of the middle housing section of the motor housing.

[0011] Further, a plurality of gas nozzles are evenly distributed in a circumferential array on the annular air pressure pipe.

[0012] Further, a plurality of mounting brackets are fixedly arranged on the annular air pressure pipe, and the annular air pressure pipe is connected to the motor protective cover through the mounting brackets.

[0013] Further, the angle formed by the jet extension line of the gas nozzle and the motor rotating shaft is adjustable, and the annular air pressure pipe can be rotated and adjusted around its own axis.

[0014] Further, an air inlet joint is arranged at the air inlet end of the air delivery pipe, and the air inlet joint is connected to communicate with the air outlet end of an air delivery pump or an air compressor.

[0015] Beneficial effects: An electric motor jet cooling device of the present utility model is independently arranged from the electric motor. Compared with a traditional air-cooled cooling device, it can cool the electric motor without increasing the load of the electric motor; at the same time, an electric motor jet cooling device of the present utility model can also cool any part of the electric motor by adjusting the annular air pressure pipe and the gas nozzles, effectively avoiding the probability of damage to the electric motor due to cooling; and it can effectively avoid blockage of the radiator caused by environmental pollution, thereby improving the cooling effect and operation stability of the electric motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an installation schematic diagram of an electric motor jet cooling device of the present utility model and the electric motor;

[0017] Figure 2 is a structural schematic diagram of an electric motor jet cooling device of the present utility model;

[0018] Figure 3 is an enlarged schematic diagram of the installation of the gas nozzle of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present utility model with reference to the accompanying drawings.

[0020] As Figures 1 - 2As shown in the figure, a motor jet cooling device includes a motor 1. An annular air pressure pipe 2 is connected to the tail end of the motor 1. The annular air pressure pipe 2 is distributed along the contour and is communicated with a plurality of gas nozzles 3. The air flow entering the annular air pressure pipe 2 can be ejected from the nozzles 31 of the plurality of gas nozzles 3. The nozzles 31 of each gas nozzle 3 correspond to the outer shell of the motor 1. As Figure 1 shown, the high-speed air flow ejected from the gas nozzle 3 can contact the motor 1 at the middle part of the outer shell of the motor 1 along the ejection extension line 32, so as to dissipate heat from the motor 1.

[0021] An air delivery joint 21 is arranged on the annular air pressure pipe 2. The annular air pressure pipe 2 is communicated with the air outlet end of an air delivery pipe 4 through the air delivery joint 21. An air inlet joint 41 is arranged at the air inlet end of the air delivery pipe 4. The air inlet joint 41 is connected to the air outlet end of an air delivery pump or an air compressor. In the embodiment of the present utility model, an air pressure pump is selected as the air delivery pump. The air delivery end of the air pressure pump inputs compressed air flow into the air delivery pipe 4 through the air inlet joint 41. Then, the compressed air flow enters the annular air pressure pipe 2 from the air delivery joint 21 after passing through the air delivery pipe 4. Finally, the compressed air flow is ejected onto the outer shell of the motor 1 through the gas nozzles 3 uniformly distributed in a circumferential array on the annular air pressure pipe 2. A solenoid valve 5 is arranged between the air inlet end and the air outlet end of the air delivery pipe 4. The solenoid valve 5 can control the flow and cut-off of the compressed air flow in the air delivery pipe.

[0022] A plurality of mounting brackets 8 are welded on the annular air pressure pipe 2. The annular air pressure pipe 2 is connected to a motor protection cover 6 at the tail of the outer shell of the motor 1 through the mounting brackets 8. The radius r of the inner circle of the annular air pressure pipe 2 is greater than the maximum radius R of the motor protection cover 6. When installing the annular air pressure pipe 2, the axis of the annular air pressure pipe 2 is arranged coaxially with the axis of the motor shaft 7, and the annular air pressure pipe 2 can rotate and adjust around its own axis. A plurality of gas nozzles 3 are uniformly distributed in a circumferential array on the annular air pressure pipe 2. The gas nozzles 3 are inclined in the horizontal direction, so that the angle formed by the ejection extension line 32 of the nozzle 31 of the gas nozzle 3 and the motor shaft 7 is within the range of 5° to 30°, and the ejection extension line 32 intersects the circumferential surface of the outer shell of the motor 1. Because the annular air pressure pipe 2 is arranged coaxially with the motor shaft 7 and the radius r of the inner circle of the annular air pressure pipe 2 is greater than the maximum radius R of the motor protection cover 6, it can ensure that the high-speed air flows ejected from the plurality of gas nozzles 3 uniformly distributed in a circumferential array on the annular air pressure pipe 2 and inclined on the horizontal plane can be uniformly ejected onto the circumferential surface of the outer shell of the motor 1.

[0023] The outer shell of the motor 1 is evenly divided into a front shell section 11, a middle shell section 12, and a tail shell section 13 from head to tail, and an experimental analysis is carried out on the situation where the ejection extension line 32 of the nozzle 31 of the gas nozzle 3 intersects different sections of the outer shell of the motor 1:

[0024] When the extension line 32 of the nozzle 31 of the gas nozzle 3 intersects with the circumferential surface of the front section 11 of the housing of the motor 1, most of the gas masses ejected from the gas nozzle 3 can only be in the front section 11 of the housing of the motor 1 under the push of the subsequent gas masses. Only a small amount of high-speed air flow can contact the circumferential surfaces of the middle section 12 and the rear section 13 of the housing of the motor 1, resulting in an excessively low local temperature of the front section 11 of the housing, forming a large temperature difference with the middle and rear sections of the housing. This will cause different degrees of thermal expansion and contraction of the components of the motor 1. For example, the motor shaft 7 may have excessive contraction of the front section 11 of the housing and insufficient contraction of the rear section 13 of the housing, resulting in a change in the concentricity of the motor shaft 7, thereby increasing the friction and vibration during the rotation of the motor shaft 7 and accelerating the wear of the components.

[0025] When the extension line 32 of the nozzle 31 of the gas nozzle 3 intersects with the circumferential surface of the rear section 13 of the housing of the motor 1, due to insufficient injection distance, the high-speed air flow ejected from the gas nozzle 3 causes a large amount of gas in contact with the circumferential surface of the rear section 13 to still have extremely strong impact force. As a result, the gas with extremely strong impact force undergoes a recoil effect on the circumferential surface of the rear section 13 of the housing, and finally the gas recoils to the periphery of the motor 1, unable to effectively dissipate heat from the front section 11 and the middle section 12 of the housing of the motor 1, resulting in a continuous increase in the temperature of the front and middle sections of the housing of the motor 1. This may cause the electromagnetic coil inside the motor 1 to overheat, the insulation performance to decline, and increase the risk of short circuit.

[0026] When the extension line 32 of the nozzle 31 of the gas nozzle 3 intersects with the circumferential surface of the middle section 12 of the housing of the motor 1, first, because the injection distance is sufficient and the impact force of the gas is exhausted, the high-speed air flow ejected from the gas nozzle 3 will not undergo a recoil phenomenon on the circumferential surface of the middle section 12 of the housing. Moreover, after the high-speed air flow contacts the middle section 12 of the housing, the gas masses in front of the air flow move forward under the push of the subsequent gas masses to dissipate heat from the front section 11 of the housing, and the gas masses behind the air flow move backward under the push of the subsequent gas masses to dissipate heat from the rear section 13 of the housing. Second, because the middle section 12 of the housing of the motor 1 is usually the main working area of the stator and the rotor and belongs to the core part of the motor 1, the temperature of this area is originally higher than that of the front section 11 and the rear section 13 of the housing during the operation of the motor 1. Therefore, the high-speed air flow ejected from the gas nozzle 3 to the middle section 12 of the housing can not only dissipate heat from the core part of the motor 1 more evenly and effectively, helping to maintain the stable performance and working efficiency of the motor 1, but also dissipate heat from the whole motor 1 evenly, thereby reducing the temperature difference between the various parts of the motor 1, reducing the thermal stress, reducing the structural deformation and component damage caused by uneven thermal expansion and contraction, and extending the overall service life of the motor 1.

[0027] Moreover, this solution also analyzes a special case where the radius r of the inner circle of the annular air pressure tube 2 is equal to the radius R of the motor protection cover 6, and the jet extension line 32 of the nozzle 31 of the gas nozzle 3 is parallel to the axis of the motor shaft. In the above-mentioned case, the high-speed air flow ejected from the gas nozzle 3 will move along the thorn plate on the outer shell of the motor 1 from the rear section 13 of the housing to the front section 11 of the housing. During this process, since the high-speed air flow absorbs the heat of the rear section 13 and the middle section 12 of the housing, when the high-speed air flow reaches the front section 11 of the housing, the heat dissipation effect on the front section 11 of the housing is not ideal enough, resulting in uneven heat dissipation of the front, middle, and rear sections of the outer shell of the motor 1, and causing local heating of the motor 1.

[0028] Based on the above experimental analysis, the present utility model finally decides to set the radius r of the inner circle of the annular air pressure tube 2 to be greater than the radius R of the motor protection cover 6, and to incline the gas nozzle 3 in the horizontal direction, so as to ensure that the high-speed air flow ejected from the gas nozzle 3 in a motor jet heat dissipation device based on the present utility model can be ejected to the area of the middle section 12 of the housing of the motor 1, thereby enabling uniform heat dissipation of the motor 1, avoiding malfunctions of the motor 1, and in the present utility model, the included angle formed by the jet extension line 32 of the gas nozzle 3 and the motor shaft 7 is adjustable, and the annular air pressure tube 2 can be rotated and adjusted around its own axis, so that the heat dissipation requirements of different parts of the motor 1 in different situations can be met.

[0029] The above is the preferred embodiment described in the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. A motor jet heat dissipation device, characterized in that: The motor (1) comprises a motor (1), wherein an annular air pressure pipe (2) is arranged at the rear end of the motor (1), wherein the annular air pressure pipe (2) is distributed along the contour and connected to a plurality of gas nozzles (3), wherein the nozzle (31) of each gas nozzle (3) corresponds to the outer shell of the motor (1).

2. The motor air jet heat dissipation device according to claim 1, characterized in that: It comprises an air delivery pipe (4), the air outlet end of the air delivery pipe (4) is connected to the air delivery connector (21) on the annular air pressure pipe (2), and the air delivery pipe (4) is provided with an electromagnetic valve (5).

3. The motor air jet heat dissipation device according to claim 1, characterized in that: The annular air pressure tube (2) is installed on the motor protection cover (6), and the radius of the inner circle of the annular air pressure tube (2) is greater than the maximum radius of the motor protection cover (6); the annular air pressure tube (2) and the motor shaft (7) are coaxially arranged.

4. The motor air jet heat dissipation device according to claim 1, characterized in that: The jet extension line (32) of the jet outlet (31) of the gas nozzle (3) intersects with the circumferential surface of the motor (1) housing.

5. The motor air jet heat dissipation device according to claim 4, characterized in that: The angle between the jet extension line (32) and the motor shaft (7) is in the range of 5° to 30°.

6. The motor air jet heat dissipation device according to claim 4, characterized in that: The motor (1) housing is evenly divided from head to tail into a housing front section (11), a housing middle section (12), and a housing tail section (13); the jet extension line (32) of the nozzle (31) of the gas nozzle (3) intersects with the circumferential surface of the housing middle section (12) of the motor (1) housing.

7. The motor air jet heat dissipation device according to claim 1, characterized in that: The plurality of gas nozzles (3) are evenly distributed on the annular air pressure tube (2) in a circular array.

8. The motor air jet heat dissipation device according to claim 3, characterized in that: A plurality of mounting brackets (8) are fixedly arranged on the annular air pressure tube (2), and the annular air pressure tube (2) is connected to the motor protection cover (6) via the mounting brackets (8).

9. The motor air jet heat dissipation device according to claim 5, characterized in that: The angle between the jet extension line (32) of the gas nozzle (3) and the motor shaft (7) is adjustable, and the annular air pressure tube (2) can be rotated and adjusted around its own axis.

10. The motor air jet heat dissipation device according to claim 2, characterized in that: The air inlet end of the air delivery pipe (4) is provided with an air inlet connector (41), and the air inlet connector (41) is connected to the air outlet end of an air delivery pump or an air compressor.

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