Three-phase asynchronous motor for tunnel fan

Abstract

The utility model relates to the technical field of three-phase asynchronous motors, and particularly discloses a three-phase asynchronous motor for a tunnel fan, which is characterized in that a chute arranged on a cage rotor can push air in a shell to flow, and the air in the shell enters a cooling cavity along an air guide pipe at one end; the semiconductor chilling plate is started to generate low temperature to cool the heat-conducting plate, the heat-conducting plate is provided with a plurality of fins, when air passes through the heat-conducting plate, the contact area with the air is increased, the air can be quickly cooled, and when the cooled air returns to the interior of the shell, the cage type rotor, the stator core and the stator winding can be cooled. The outer portion of the shell is smooth and free of open grooves and fins, the contact area with hot air can be reduced, external heat is effectively isolated outside in cooperation with a ceramic heat insulation sleeve in the shell, the interior of the motor is cooled through a semiconductor chilling plate and a heat conduction plate, meanwhile, the external heat is isolated outside, and the effect of stable operation in a high-temperature environment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase asynchronous motors, in particular to a three-phase asynchronous motor for a tunnel fan. Background Art

[0002] Tunnel fans can keep the air in the tunnel fresh and flowing, provide sufficient oxygen for people in the tunnel, and avoid hypoxia. Vehicle operation will generate a large amount of exhaust gas and heat. Tunnel fans can also discharge these harmful gases and heat in time and introduce fresh air.

[0003] In the event of a fire or other emergency, the existing fan motor will heat up when it discharges thick smoke and toxic gases. The high temperature air will cause the motor temperature to rise. Excessive temperature may cause the magnetic material of the motor to weaken, and the internal resistance of the motor to increase, and the current loss will increase, affecting the efficiency and output power of the motor, making the motor unable to operate stably in a high temperature environment. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the deficiencies in the prior art, the utility model provides a three-phase asynchronous motor for a tunnel fan, which solves the technical problem that in the event of a fire or other emergency, the high-temperature air in the existing fan motor will cause the motor temperature to rise during the process of discharging thick smoke and toxic gases. Excessive temperature may cause the magnetic material of the motor to weaken, and the internal resistance of the motor to increase, the current loss to increase, affecting the efficiency and output power of the motor, and making the motor unable to operate stably in a high-temperature environment.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A three-phase asynchronous motor for a tunnel fan comprises a housing, a cooling chamber is defined at the bottom end of the housing, a heat conducting plate is fixedly mounted inside the cooling chamber, a semiconductor refrigeration plate is fixedly mounted at the bottom end of the heat conducting plate, two end covers are symmetrically fixedly mounted at both ends of the housing, a plurality of air ducts are fixedly mounted between the end covers and the cooling chamber, a cage rotor is rotatably mounted inside the housing, a plurality of inclined slots are defined on the outer surface of the cage rotor, a ceramic thermal insulation sleeve is fixedly mounted on the inner side wall of the housing, a stator core is fixedly mounted inside the ceramic thermal insulation sleeve, a plurality of stator windings are fixedly mounted on the stator core, an output shaft is fixedly mounted inside the cage rotor, and a sealed bearing is fixedly mounted inside the end cover.

[0009] Preferably, a plurality of mounting blocks are symmetrically and slidingly mounted on both ends of the housing.

[0010] Preferably, bolts are threadedly mounted on the plurality of mounting blocks.

[0011] (3) Beneficial effects

[0012] 1. Slide the pipe mounting block according to the needs to be installed, so that the mounting block slides to the position corresponding to the mounting bracket, and then tighten the bolts so that the bolts tightly clamp the shell to fix the position of the mounting block on the shell. After adjusting the positions of all mounting blocks, they can be installed through the mounting holes opened on the mounting blocks. Multiple mounting blocks can be freely adjusted in position according to needs and can be installed with pipes of various specifications, achieving the effect of increasing installation adaptability.

[0013] 2. The inclined slots on the cage rotor can promote the air flow inside the shell. The air inside the shell will enter the cooling cavity along the air duct at one end, and return to the shell through the air duct at the other end after passing through the heat conducting plate. The semiconductor refrigeration plate starts to generate low temperature to cool the heat conducting plate. There are multiple fins on the heat conducting plate. When the air passes through, the contact area with the air is increased to quickly cool the air. When the cooled air returns to the inside of the shell, it can cool the cage rotor, stator core and stator winding. The outside of the shell is smooth without slots and fins, which can reduce the contact area with hot air. The ceramic insulation sleeve inside the shell can effectively isolate the external heat from the outside. The motor is cooled internally by the semiconductor refrigeration plate and the heat conducting plate, and the external heat is isolated from the outside, achieving the effect of stable operation even in a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0015] Figure 1 This is a structural diagram of the installation block of the utility model;

[0016] Figure 2 This is a structural diagram of the end cover of the present utility model;

[0017] Figure 3 It is a cross-sectional structural diagram of the utility model;

[0018] Figure 4 This is a structural diagram of the cage rotor of the present utility model.

[0019] Legend: 1. Housing; 2. Cooling chamber; 3. Heat conducting plate; 4. Semiconductor cooling plate; 5. End cover; 6. Air duct; 7. Cage rotor; 8. Ceramic insulation sleeve; 9. Stator core; 11. Stator winding; 12. Output shaft; 13. Sealed bearing; 14. Mounting block; 15. Bolt. DETAILED DESCRIPTION

[0020] The embodiment of the present application provides a three-phase asynchronous motor for a tunnel fan, which effectively solves the technical problem that in the event of a fire or other emergency, the high-temperature air will cause the motor temperature to rise during the process of exhausting thick smoke and toxic gases from the existing fan motor. Excessive temperature may weaken the magnetism of the motor's magnetic material, increase the internal resistance of the motor, increase the current loss, affect the efficiency and output power of the motor, and make the motor unable to operate stably in a high-temperature environment. The pipe sliding mounting block is installed as needed, so that the mounting block slides to the position corresponding to the mounting bracket, and then the bolts are tightened so that the bolts tightly clamp the shell to fix the position of the mounting block on the shell. After the positions of all the mounting blocks are adjusted, they can be installed through the mounting holes opened on the mounting blocks. Multiple mounting blocks can be freely adjusted in position according to needs and can be installed with pipes of various specifications. The effect of increasing installation adaptability is achieved. The inclined slots on the cage rotor can promote the air flow inside the shell. The air inside the shell will enter the cooling cavity along the air duct at one end, and return to the shell through the air duct at the other end after passing through the heat conducting plate. The semiconductor refrigeration plate starts to generate low temperature to cool the heat conducting plate. There are multiple fins on the heat conducting plate. When the air passes through, the contact area with the air is increased to quickly cool the air. When the cooled air returns to the inside of the shell, it can cool the cage rotor, stator core and stator winding. The outside of the shell is smooth without slots and fins, which can reduce the contact area with hot air. The ceramic insulation sleeve inside the shell can effectively isolate the external heat from the outside. The motor is cooled internally by the semiconductor refrigeration plate and the heat conducting plate, and the external heat is isolated from the outside, achieving the effect of stable operation even in a high temperature environment.

[0021] Example

[0022] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that in the event of a fire or other emergency, when the existing fan motor is discharging thick smoke and toxic gases, the high temperature air will cause the motor temperature to rise. Excessive temperature may cause the magnetic material of the motor to weaken, and the internal resistance of the motor to increase, the current loss increases, affecting the efficiency and output power of the motor, making the motor unable to operate stably in a high temperature environment. The overall idea is as follows:

[0023] In response to the problems existing in the prior art, the utility model provides a three-phase asynchronous motor for a tunnel fan, comprising a casing 1, a cooling chamber 2 being opened at the bottom end of the casing 1, a heat conducting plate 3 being fixedly installed inside the cooling chamber 2, a semiconductor refrigeration plate 4 being fixedly installed at the bottom end of the heat conducting plate 3, two end covers 5 being symmetrically fixedly installed at both ends of the casing 1, and a plurality of air guide pipes 6 being fixedly installed between the end covers 5 and the cooling chamber 2.

[0024] A cage rotor 7 is rotatably mounted inside the housing 1; a plurality of inclined slots are provided on the outer surface of the cage rotor 7; a ceramic thermal insulation sleeve 8 is fixedly mounted on the inner side wall of the housing 1, a stator core 9 is fixedly mounted inside the ceramic thermal insulation sleeve 8, and a plurality of stator windings 11 are fixedly mounted on the stator core 9.

[0025] An output shaft 12 is fixedly installed inside the cage rotor 7 , a sealed bearing 13 is fixedly installed inside the end cover 5 , and multiple mounting blocks 14 are symmetrically slidably installed at both ends of the housing 1 , and bolts 15 are threadedly installed on the multiple mounting blocks 14 .

[0026] Working principle:

[0027] The first step is to install in the exhaust duct. There are multiple brackets on the duct mounting support frame, and the number and angle of the brackets are different. According to the duct sliding mounting block 14 to be installed as needed, the mounting block 14 is slid to the position corresponding to the mounting bracket, and then the bolt 15 is tightened so that the bolt 15 tightly clamps the shell 1 to fix the position of the mounting block 14 on the shell 1. After the positions of all the mounting blocks 14 are adjusted, they can be installed through the mounting holes opened on the mounting blocks 14, and both ends of the output shaft 12 extend out of the shell 1, so that two fan blades with opposite blades can be installed at the same time. Multiple mounting blocks 14 can be freely adjusted in position according to needs and can be installed with ducts of various specifications, thereby achieving the effect of increasing installation adaptability.

[0028] In the second step, the model of the semiconductor refrigeration plate 4 is (THC1-19912) and can operate at a high temperature of 200 degrees. When exhausting smoke, the stator winding 11 is connected to three-phase electricity, and the stator core 9 strengthens the magnetic attraction generated by the stator winding 11, thereby driving the cage rotor 7 to rotate. The cage rotor 7 drives the output shaft 12 to rotate and promotes air flow. In this process, the inclined slots on the cage rotor 7 can promote the air flow inside the shell 1. The air inside the shell 1 will enter the cooling chamber 2 along the air duct 6 at one end, and then return to the inside of the shell 1 through the air duct 6 at the other end after passing through the heat conducting plate 3. The semiconductor refrigeration plate 4 is started to generate low temperature to cool the heat conducting plate 3. There are multiple fins on the heat conducting plate 3. When air passes through, the contact area with the air is increased, which can quickly cool the air. When the cooled air returns to the inside of the shell 1, it can cool the cage rotor 7, the stator core 9 and the stator winding 11. The outer surface of the shell 1 is smooth without slots and fins, which can reduce the contact area with the hot air. The ceramic insulation sleeve 8 inside the shell 1 can effectively isolate the external heat from the outside. The semiconductor cooling plate 4 and the heat conducting plate 3 are used to cool the internal part of the motor, and the external heat is isolated from the outside, so that the motor can operate stably even in a high temperature environment.

[0029] Finally, it should be noted that the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A three-phase asynchronous motor for a tunnel fan, comprising a housing (1), characterized in that: A cooling cavity (2) is provided at the bottom end of the housing (1), a heat conducting plate (3) is fixedly installed inside the cooling cavity (2), a semiconductor cooling plate (4) is fixedly installed at the bottom end of the heat conducting plate (3), two end covers (5) are symmetrically fixedly installed at both ends of the housing (1), a plurality of air guide tubes (6) are fixedly installed between the end covers (5) and the cooling cavity (2), and a cage rotor (7) is rotatably installed inside the housing (1); The outer surface of the cage rotor (7) is provided with a plurality of inclined slots.

2. A three-phase asynchronous motor for a tunnel fan according to claim 1, characterized in that: A ceramic heat-insulating sleeve (8) is fixedly mounted on the inner side wall of the housing (1), a stator core (9) is fixedly mounted inside the ceramic heat-insulating sleeve (8), and a plurality of stator windings (11) are fixedly mounted on the stator core (9).

3. A three-phase asynchronous motor for a tunnel fan according to claim 1, characterized in that: An output shaft (12) is fixedly mounted inside the cage rotor (7).

4. A three-phase asynchronous motor for a tunnel fan according to claim 1, characterized in that: A sealed bearing (13) is fixedly installed inside the end cover (5).

5. The three-phase asynchronous motor for a tunnel fan according to claim 1, characterized in that: A plurality of mounting blocks (14) are symmetrically and slidingly mounted on both ends of the housing (1).

6. A three-phase asynchronous motor for a tunnel fan according to claim 5, characterized in that: Bolts (15) are threadedly mounted on the plurality of mounting blocks (14).

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