High-efficiency low-voltage explosion-proof three-phase asynchronous motor

Abstract

The application discloses a high-efficiency low-voltage explosion-proof three-phase asynchronous motor and relates to the technical field of motors.The application comprises an explosion-proof shell and a stator winding installed in the explosion-proof shell, a plurality of air outlet holes in a ring shape are arranged on the periphery of the explosion-proof shell, and a cover plate is arranged at the port of the explosion-proof shell and used for covering the port part of the explosion-proof shell.The application forms a flow state between the inside of the motor and the outside by arranging air outlet holes and air inlet holes on the explosion-proof shell and the cover plate, thereby avoiding the phenomenon that the pressure in the explosion-proof shell is too large due to the excessively high temperature inside the explosion-proof shell.In addition, the heat generated by the electronic winding can be further guided to the outside through the design of the heat-conducting block, and the continuous accumulation of heat in the motor can be reduced through the mutual cooperation of the whole, thereby playing a better explosion-proof role to a certain extent compared with the conventional three-phase asynchronous motor.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, specifically to a high-efficiency, low-voltage, explosion-proof three-phase asynchronous motor. Background Technology

[0002] Three-phase asynchronous motors are a type of induction motor. Because the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is slip, hence the name three-phase asynchronous motor. Compared with single-phase asynchronous motors, three-phase asynchronous motors have better operating performance and can save various materials. According to the different rotor structures, three-phase asynchronous motors can be divided into two types: squirrel-cage and wound-rotor. Squirrel-cage asynchronous motors have a simple structure, reliable operation, light weight, and low price, and are widely used. Wound-rotor three-phase asynchronous motors also have three-phase windings on the rotor and stator, which are connected to an external rheostat through slip rings and brushes. Adjusting the resistance of the rheostat can improve the starting performance of the motor and regulate the speed of the motor.

[0003] Among them, the explosion-proof three-phase asynchronous motor has an explosion-proof enclosure and is an electric motor that generates electromagnetic torque by the interaction between the rotating magnetic field in the air gap and the induced current in the rotor winding. The existing explosion-proof three-phase asynchronous motor has a sealed enclosure, which makes the air circulation between the inside and outside poor. When it works for a long time, heat is easy to accumulate inside, which can lead to excessively high internal temperature and high internal pressure. Therefore, this design can have a negative impact on its explosion-proof effect. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency, low-voltage explosion-proof three-phase asynchronous motor to solve the problems mentioned above in the background art.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0006] High-efficiency, low-voltage, explosion-proof three-phase asynchronous motors, including:

[0007] The explosion-proof enclosure and the stator winding installed inside the explosion-proof enclosure, wherein the explosion-proof enclosure has a plurality of vent holes arranged in a ring around its periphery;

[0008] A cover plate disposed at the port of the explosion-proof enclosure and used to seal the port portion of the explosion-proof enclosure;

[0009] Rotary rotor installed inside the explosion-proof enclosure;

[0010] A gas guiding assembly is installed on the rotor, and an air inlet is provided on the cover plate. When the rotor rotates, external air enters the explosion-proof housing through the air inlet under the action of the gas guiding assembly and flows out from the air outlet.

[0011] A heat-conducting block is disposed on the explosion-proof enclosure, which penetrates the explosion-proof enclosure and contacts the stator winding.

[0012] Furthermore, there are multiple heat-conducting blocks, which are evenly distributed along the circumferential surface of the explosion-proof housing.

[0013] Furthermore, the heat-conducting block is provided with heat dissipation holes facing the outside of the explosion-proof housing.

[0014] Furthermore, it also includes a plurality of strip-shaped blocks constructed on the peripheral side of the explosion-proof enclosure, the width of which is greater than the exposed length of the heat-conducting block, the plurality of strip-shaped blocks being evenly distributed along the peripheral side of the explosion-proof enclosure, and the length direction of which is parallel to the axial direction of the explosion-proof enclosure.

[0015] Furthermore, the inner circumferential surface of the explosion-proof enclosure is provided with a plurality of guide grooves evenly distributed along its circumferential direction and extends along the length direction of the explosion-proof enclosure to cooperate with the stator winding to form a plurality of vent holes parallel to the length direction of the explosion-proof enclosure.

[0016] Furthermore, the number of air outlets is consistent with the number of guide grooves, and the multiple air outlets penetrate the groove walls of the multiple guide grooves respectively, and the multiple air outlets are all located near the end of the vent.

[0017] Furthermore, the gas guiding assembly includes a turntable fixedly mounted on the rotor shaft and a plurality of arc-shaped plates uniformly constructed around the turntable.

[0018] Furthermore, a gap is formed between the inner circumference of the stator winding and the circumference of the rotor, the circumference of the turntable is smaller than the inner circumference of the gap, and the maximum circumferential diameter of the annular surface where the plurality of arc plates are located is larger than the outer circumference of the gap.

[0019] Furthermore, it also includes a mesh plate disposed on the cover plate, which covers the air inlet.

[0020] Furthermore, the cover plate is provided with a circular protrusion, and the mesh plate is provided with a mounting hole that is threadedly engaged with the protrusion.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. This invention, by providing vents and inlets on the explosion-proof housing and cover plate respectively, allows for airflow between the motor's interior and the outside environment, thus preventing excessive pressure caused by high internal temperature. Simultaneously, the gas guiding component creates an internal and external airflow circulation effect within the motor, continuously dissipating internal heat to the outside. Furthermore, the heat-conducting block design further directs heat generated on the electronic windings to the outside. Through this overall coordination, the continuous accumulation of heat within the motor is reduced. Therefore, compared to traditional three-phase asynchronous motors, this invention provides a better explosion-proof effect to a certain extent.

[0023] 2. By designing multiple heat-conducting blocks and distributing them evenly along the periphery of the explosion-proof shell, the present invention can uniformly dissipate heat to all parts of the outer periphery of the stator winding, thereby further increasing the heat dissipation effect and making the heat dissipation more uniform.

[0024] 3. The present invention, through the design of heat dissipation holes, can further increase the contact area between the heat-conducting block and the external air, thereby facilitating the entry of internal air into the outside through the heat dissipation holes, which in turn facilitates the better dissipation of heat into the air, thereby enhancing the heat dissipation effect of the heat-conducting block and fully dissipating the internal heat.

[0025] 4. The design of multiple strip-shaped baffles in this invention can further increase the hardness of the explosion-proof shell, providing excellent physical protection for the motor as a whole. At the same time, the design of the strip-shaped baffles can also increase the protection of the heat-conducting block. When the motor comes into contact with other external components, it can provide physical protection for the heat-conducting block and prevent it from being bumped or knocked.

[0026] 5. The present invention, through the design of multiple air guide holes, can cooperate with the outer periphery of the silicon steel sheet of the stator winding to form a vent hole. Thus, when airflow passes through, it can increase the contact area between the outer surface of the stator winding and the airflow, and at the same time further reduce the sealed space inside the motor to reduce the area conducive to heat concentration. This increases the contact effect between the airflow and the entire motor interior, thereby increasing the heat dissipation effect.

[0027] 6. The present invention, through the positional cooperation between the air outlet and the guide groove, allows the gas coming out of the guide groove to directly enter the air outlet and flow directly to the outside, thereby increasing the airflow speed and thus increasing the ventilation rate, and further increasing the overall heat dissipation rate.

[0028] 7. The present invention uses a turntable and multiple arc plates in a coordinated design so that when the rotor rotates, it can generate a driving force on the air, thereby guiding the gas flow and generating internal and external circulating airflow to dissipate heat from the interior.

[0029] 8. By forming a gap between the stator winding and the rotor, the present invention can increase the contact area between the airflow and the stator winding and the rotor, so that the airflow can pass through the gap to have a wind-cooling effect between the circumference of the rotor and the inner circumference of the stator winding, so that the heat here can be transferred to the airflow and then carried away by the airflow, thereby increasing the overall heat dissipation effect.

[0030] 9. The present invention, through the design of the mesh plate, has the effect of intercepting impurities in the air entering the motor, thereby reducing the occurrence of impurities entering the motor and reducing the impact on the operation of the motor. At the same time, it can also reduce the phenomenon of heat accumulation caused by the accumulation of impurities.

[0031] 10. The present invention facilitates the separation and installation of the protrusion and the mesh plate through the threaded connection between the protrusion and the mesh plate, thereby facilitating the cleaning and maintenance of the mesh plate. Attached Figure Description

[0032] Figure 1 This is a perspective view of the present invention;

[0033] Figure 2 This is another perspective view of the present invention;

[0034] Figure 3 This is an exploded view of the present invention;

[0035] Figure 4 This is the present invention. Figure 3 Another 3D image;

[0036] Figure 5 This is a breakdown diagram of the partial structures of the present invention;

[0037] Figure 6 This is a breakdown diagram of another partial structure of the present invention;

[0038] Reference numerals in the attached drawings: 1. Explosion-proof enclosure; 2. Stator winding; 3. Vent; 4. Cover plate; 5. Rotor; 6. Flow guide assembly; 7. Air inlet; 8. Heat conduction block; 9. Heat dissipation hole; 10. Strip-shaped baffle; 11. Flow guide groove; 12. Turntable; 13. Arc plate; 14. Mesh plate; 15. Protrusion; 16. Mounting hole. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] like Figure 1-6 As shown, an embodiment of the present invention provides a high-efficiency, low-voltage explosion-proof three-phase asynchronous motor, comprising:

[0041] The explosion-proof enclosure 1 and the stator winding 2 installed inside the explosion-proof enclosure 1, the stator winding 2 is composed of an iron core and a coil, the iron core is composed of multiple silicon steel sheets, and the explosion-proof enclosure 1 has multiple vent holes 3 arranged in a ring around its periphery, so that the interior and the exterior are kept in communication through the vent holes 3.

[0042] A cover plate 4 is provided at the port of the explosion-proof enclosure 1 and is used to seal the port of the explosion-proof enclosure 1. The cover plate 4 is specifically in the shape of a circular plate and is installed at the opening of the explosion-proof enclosure 1 by bolts, thereby forming a seal on the inside.

[0043] The rotor 5 is rotatably installed inside the explosion-proof housing 1. The rotor 5 mainly includes a rotating shaft and permanent magnets installed around the rotating shaft. The two ends of the rotating shaft are respectively rotatably engaged with the shell wall of the explosion-proof housing 1 and the cover plate 4, thereby realizing the rotational relationship of the entire rotor 5 inside. Therefore, when the winding is energized, the rotor 5 rotates due to the attraction of the magnetic field within the rotating magnetic field. The specific design points of the present invention also include the following structures:

[0044] The gas guiding assembly 6 is installed on the rotor 5. The cover plate 4 is provided with an air inlet 7 for gas to enter. When the rotor 5 rotates, the external air enters the explosion-proof housing 1 through the air inlet 7 under the action of the gas guiding assembly 6, and flows out from the air outlet 3, thereby forming a gas flow inside to achieve an internal and external circulation effect of the air inside the motor.

[0045] The heat-conducting block 8, which is made of copper, is installed on the explosion-proof housing 1, giving it good thermal conductivity. The heat-conducting block 8 penetrates the explosion-proof housing 1 and contacts the stator winding 2, with one end in contact with the iron core and the other end exposed to the outside of the explosion-proof housing 1. This allows the heat on the iron core to be conducted to the outside by the heat-conducting block 8. Since the current only flows through the coil of the winding during operation, the heat is mainly generated from the coil, i.e., the heat is mainly generated in the winding and thus concentrated on the iron core. Therefore, the heat can be quickly transferred to the outside of the explosion-proof housing 1 through the heat-conducting block 8.

[0046] Throughout the design, a flow system is established between the inside of the motor and the outside environment, preventing excessive internal pressure caused by high temperature. Simultaneously, the gas guiding component 6 creates an internal and external airflow circulation effect, continuously dissipating internal heat to the outside. Furthermore, the design of the heat-conducting block 8 further directs heat generated on the stator winding 2 to the outside. This overall coordination reduces the continuous accumulation of heat inside the motor, thus mitigating the phenomenon of continuously rising internal temperature. Therefore, compared to traditional three-phase asynchronous motors, this invention further improves the explosion-proof performance of traditional three-phase asynchronous motors to a certain extent.

[0047] In order to ensure that the heat dissipation effect is evenly distributed throughout the iron core, such as Figure 1-6 As shown, in some embodiments, the number of heat-conducting blocks 8 is designed to be multiple, and the multiple heat-conducting blocks 8 are evenly distributed along the peripheral side of the explosion-proof shell 1, which can uniformly dissipate heat to all parts of the outer peripheral side of the stator winding 2, thereby further increasing the internal heat dissipation effect.

[0048] To enhance the heat dissipation effect of the heat-conducting block 8, such as Figure 1-6 As shown, in some embodiments, the heat-conducting block 8 is provided with heat dissipation holes 9, the openings of which face the outer peripheral surface of the explosion-proof housing 1. This can further increase the contact area between the heat-conducting block 8 and the external air, so as to promote the air to enter the internal structure of the heat-conducting block 8 and allow the heat to be fully dissipated into the air, thereby enhancing the heat dissipation effect of the heat-conducting block 8 and thus fully conducting the heat inside the explosion-proof housing 1 to the outside.

[0049] To enhance the overall strength of the electric motor in accordance with the design features of this invention, such as... Figure 1-6As shown, in some embodiments, multiple strip-shaped blocks 10 are also constructed on the periphery of the explosion-proof enclosure 1, thereby increasing the hardness of the explosion-proof enclosure 1 and enhancing its resistance to deformation. The width of the strip-shaped blocks 10 is greater than the exposed length of the heat-conducting block 8. It can be understood that grooves are formed between the strip-shaped blocks 10, and the heat-conducting block 8 is located inside the grooves. Therefore, when the entire motor is placed on the ground, the strip-shaped blocks 10 directly contact the ground, thus providing physical protection for the heat-conducting block 8. In addition, when the entire motor comes into contact with other external components, it can also provide physical protection for the heat-conducting block 8, preventing direct impact and damage. The multiple strip-shaped blocks 10 are evenly distributed along the periphery of the explosion-proof enclosure 1, and their length direction is parallel to the axial direction of the explosion-proof enclosure 1. This design can provide good physical protection for the entire exterior of the motor. For example, when the entire exterior is impacted, the strip-shaped blocks 10 can withstand part of the force, thereby preventing the explosion-proof enclosure 1 from being directly damaged.

[0050] To increase the overall contact between airflow and the entire interior of the motor, thereby improving heat dissipation, such as... Figure 5 and Figure 6 As shown, in some embodiments, the explosion-proof housing 1 has a plurality of guide grooves 11 evenly distributed along its circumferential direction on its inner circumferential surface for air to flow through, and extends along the length direction of the explosion-proof housing 1 to cooperate with the stator winding 2 to form a plurality of vent holes parallel to the length direction of the explosion-proof housing 1. Thus, when airflow passes through, the contact area between the outer surface of the stator winding 2 and the airflow can be increased, and the sealed space inside the entire motor can be further reduced to reduce the area conducive to heat concentration and increase the heat dissipation effect.

[0051] To further increase the overall heat dissipation rate, such as Figure 5 and Figure 6 As shown, in some embodiments, the number of air outlets 3 is consistent with the number of guide grooves 11. Multiple air outlets 3 penetrate the walls of multiple guide grooves 11, that is, the air outlets 3 are dug into the groove walls, and multiple air outlets 3 are located near the end of the vent, that is, the end opposite to the cover plate 4. Through the mutual cooperation of the positions of the air outlets 3 and the guide grooves 11, the gas coming out of the guide grooves 11 can directly enter the air outlets 3, and thus flow directly to the outside, so as to increase the speed of airflow and thus increase the ventilation rate.

[0052] like Figure 2 and Figure 5As shown, in some embodiments, the gas guiding assembly 6 includes a turntable 12 fixedly mounted on the rotating shaft of the rotor 5 and a plurality of arc-shaped plates 13 uniformly constructed around the turntable 12. The whole assembly is a single piece. Through the overall cooperative design, when the rotor 5 rotates, the turntable 12 rotates together with the plurality of arc-shaped plates 13, thereby pushing the air to guide the gas to form a flow, thereby generating an internal and external circulating airflow, so that the airflow enters from the air inlet 7 to dissipate heat from the interior.

[0053] To further enhance the overall heat dissipation effect, such as Figure 2 As shown, in some embodiments, a gap is formed between the inner circumference of the stator winding 2 and the circumference of the rotor 5. That is, the circumference of the rotor 5 is much smaller than the inner circumference of the stator winding 2, thus forming a gap. This can simultaneously increase the contact area between the airflow and the stator winding 2 and the rotor 5, allowing the airflow to pass through the gap and providing a cooling effect between the circumference of the rotor 5 and the inner circumference of the stator. The circumference of the turntable 12 is smaller than the inner circumference of the gap, and the maximum circumferential diameter of the annular surface where the multiple arc plates 13 are located is larger than the outer circumference of the gap. This allows the annular surface where the multiple arc plates 13 are located to completely cover the gap area, enabling the airflow to fully enter the inner and outer circumferences of the stator winding 2 and fully contact the iron core. This allows the heat at the gap to be transferred to the airflow and then conducted away, thereby increasing the overall heat dissipation effect.

[0054] To reduce heat buildup caused by the accumulation of impurities, such as Figure 2-4 As shown, in some embodiments, a mesh plate 14 is also provided on the cover plate 4, which covers the air inlet 7. The design of the mesh plate 14 can intercept impurities in the air entering the motor, thereby reducing the occurrence of impurities entering the motor and reducing the impact on the operation of the motor, while also increasing the overall service life of the motor.

[0055] To facilitate the cleaning and maintenance of the mesh panel 14, such as Figure 2-4 As shown, in some embodiments, the cover plate 4 is provided with a circular protrusion 15, and the mesh plate 14 is provided with a mounting hole 16, which is adapted to the size of the protrusion 15 and is threadedly engaged with the protrusion 15, so that the connection and disassembly between the two can be convenient. Therefore, when too many impurities accumulate on the mesh plate 14, it can be disassembled and the mesh plate 14 can be cleaned.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency, low-voltage, explosion-proof three-phase asynchronous motor, characterized in that, include: The explosion-proof enclosure (1) and the stator winding (2) installed inside the explosion-proof enclosure (1) are provided with a plurality of vent holes (3) arranged in a ring around the periphery of the explosion-proof enclosure (1). A cover plate (4) is provided at the port of the explosion-proof enclosure (1) and is used to seal the port of the explosion-proof enclosure (1). An air inlet (7) is provided on the cover plate (4). Rotate the rotor (5) installed inside the explosion-proof enclosure (1); A gas guide assembly (6) is installed on the rotor (5). When the rotor (5) rotates, external air enters the explosion-proof housing (1) through the air inlet (7) under the action of the gas guide assembly (6) and flows out from the air outlet (3). A heat-conducting block (8) is provided on the explosion-proof housing (1), which penetrates the explosion-proof housing (1) and contacts the stator winding (2). There are multiple heat-conducting blocks (8), which are evenly distributed along the periphery of the explosion-proof housing (1). Multiple strip-shaped baffles (10) are constructed on the periphery of the explosion-proof housing (1). The width of the strip-shaped baffles (10) is greater than the exposed length of the heat-conducting block (8). The multiple strip-shaped baffles (10) are evenly distributed along the periphery of the explosion-proof housing (1), and the exposed end of the heat-conducting block (8) is located in the groove formed by the strip-shaped baffles (10). The explosion-proof housing (1) has a plurality of guide grooves (11) evenly distributed along its own circumferential direction on its inner circumferential surface, and extends along the length direction of the explosion-proof housing (1) to cooperate with the stator winding (2) to form a plurality of vent holes parallel to the length direction of the explosion-proof housing (1); the number of vent holes (3) is consistent with the number of guide grooves (11), and the plurality of vent holes (3) respectively penetrate the groove walls of the plurality of guide grooves (11), and the plurality of vent holes (3) are all located near the end of the vent holes.

2. The high-efficiency, low-voltage, explosion-proof three-phase asynchronous motor according to claim 1, characterized in that, The heat-conducting block (8) has heat dissipation holes (9) facing the outer peripheral surface of the explosion-proof shell (1).

3. The high-efficiency, low-voltage, explosion-proof three-phase asynchronous motor according to claim 1, characterized in that, It also includes a plurality of strip-shaped blocks (10) constructed on the periphery of the explosion-proof enclosure (1), the width of which is greater than the exposed length of the heat-conducting block (8), the plurality of strip-shaped blocks (10) being evenly distributed along the periphery of the explosion-proof enclosure (1), and their length direction being parallel to the axial direction of the explosion-proof enclosure (1).

4. The high-efficiency, low-voltage explosion-proof three-phase asynchronous motor according to claim 1, characterized in that, The gas guiding assembly (6) includes a turntable (12) fixedly mounted on the shaft of the rotor (5) and a plurality of arc-shaped plates (13) uniformly constructed around the turntable (12).

5. The high-efficiency, low-voltage, explosion-proof three-phase asynchronous motor according to claim 4, characterized in that, A gap is formed between the inner circumference of the stator winding (2) and the circumference of the rotor (5). The circumference of the turntable (12) is smaller than the inner circumference of the gap. The maximum circumferential diameter of the annular surface where the multiple arc plates (13) are located is larger than the outer circumference of the gap.

6. The high-efficiency, low-voltage explosion-proof three-phase asynchronous motor according to claim 1, characterized in that, The cover plate (4) has a circular protrusion (15), and the mesh plate (14) has a mounting hole (16) that is threadedly engaged with the protrusion (15).

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