Axial flow fan capable of carrying out fault early warning based on motor temperature

Abstract

The utility model relates to an axial flow fan capable of carrying out fault early warning based on motor temperature, which comprises a vertical air duct, a vertical motor and an impeller are respectively inserted into the upper part and the lower part of the air duct, the impeller is fixedly connected onto a rotating shaft of the motor, a plurality of motor brackets are fixedly connected onto a motor shell, the outer ends of the motor brackets are respectively and fixedly connected onto the inner wall of the air duct, and the inner wall of the air duct is fixedly connected with the motor bracket. The upper end of the motor shell is fixedly connected with a circular shell cover, a vertical temperature measuring sleeve is inserted and fixed in the middle of the shell cover, the upper end of the temperature measuring sleeve extends out of the shell cover and is screwed and fixedly connected with a temperature sensor, and a probe of the temperature sensor faces the interior of the motor shell; the outer wall of the temperature measuring sleeve on the upper side of the motor is fixedly connected with a threading pipe, the outer end of the threading pipe is inserted and fixed on the air duct, and a connecting wire of the temperature measuring sleeve is inserted in the threading pipe; a conical flow guide cover is fixedly connected to the shell cover in an inserted and sleeved mode. According to the axial flow fan, the temperature sensor temperature measuring structure is arranged at the bottom of the motor shell, the temperature in the motor can be monitored, and then fault early warning is achieved.

Description

Technical field:

[0001] The utility model relates to the technical field of axial flow fans, and more specifically to an axial flow fan capable of performing fault warning based on motor temperature. Background technology:

[0002] Axial flow fans are widely used. They are fans in which the airflow direction is in the same direction as the axis of the fan blades. Ordinary axial flow fans can be used for ventilation in general factories, warehouses, offices, residences and other places. There are also axial flow fans for mining. Currently, axial flow fans for mining need to work for a long time. Long-term work will cause the fan motor to generate a lot of heat. If the heat cannot be dissipated in time, the fan will burn out. The motor in the existing axial flow fan is mainly cooled by the airflow generated by the rotation of the impeller. However, sometimes the temperature of the entire environment increases, that is, the air in the working environment of the fan sometimes increases. The increased air temperature plus long-term operation will cause the motor to be unable to dissipate heat in time. Therefore, in this case, a fault warning structure is needed on the axial flow fan to prompt the axial flow fan to stop or use other cooling structures to dissipate the heat of the axial flow fan motor. Therefore, some people have suggested that the temperature of the motor can be monitored to provide a timely fault warning, so a corresponding motor temperature monitoring structure needs to be designed. Utility model content:

[0003] The purpose of the utility model is to address the deficiencies of the existing technology and to provide an axial flow fan with fault warning based on motor temperature. The axial flow fan is provided with a temperature sensor measuring structure at the bottom of the motor housing, which can monitor the temperature inside the motor and thereby realize fault warning.

[0004] An axial flow fan for fault warning based on motor temperature comprises a vertical air guide tube, wherein a vertical motor and an impeller are respectively inserted in the upper and lower parts of the air guide tube, the impeller is fixedly connected to the rotating shaft of the motor, a plurality of motor brackets are fixedly connected to the outer wall of the motor housing, the outer ends of the motor brackets are respectively fixedly connected to the inner wall of the air guide tube, a circular shell cover is fixedly connected to the upper end of the motor housing, a vertical temperature measuring sleeve is inserted and fixed in the middle of the shell cover, the upper end of the temperature measuring sleeve extends out of the shell cover and is screwed with a temperature sensor, and the probe of the temperature sensor faces the inside of the motor housing;

[0005] A horizontal threading tube is fixedly connected to the outer wall of the temperature measuring sleeve on the upper side of the motor, the outer end of the threading tube is plugged and fixed on the air guide tube, and the wiring of the temperature measuring sleeve is inserted in the threading tube; a conical air guide cover is fixedly connected to the plug sleeve on the shell cover, and the threading tube is inserted on the air guide cover.

[0006] Preferably, an L-shaped protective tube is fixedly connected to the outer wall of the threading tube near the temperature measuring sleeve, the protective tube and the threading tube are connected, the wiring on the temperature measuring sleeve passes through the protective tube and is inserted into the threading tube, and the protective tube and the temperature sensor are both located in the guide cover.

[0007] Preferably, a thread is formed on the outer wall of the outer end of the threading tube, the outer end of the threading tube extends out of the air guide tube and is screwed with a nut, a nut is screwed on the threading tube inside the air guide tube, a rubber gasket is clamped between the nut and the inner wall of the air guide tube, and the rubber gasket is inserted into the threading tube.

[0008] Preferably, the lower part of the temperature measuring sleeve is inserted in the shell cover and is inserted with a spiral and horizontal cooling coil, the two ends of the cooling coil are respectively bent to form a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe pass through the shell cover and are respectively inserted on the air guide tube, a positioning block is fixed on the air guide tube, and the liquid inlet pipe and the liquid outlet pipe are both inserted and fixed on the positioning block; the lower end of the temperature measuring sleeve is located on the lower side of the cooling coil and is fixed with a plurality of horizontal support rods, and the cooling coil rests on the support rods.

[0009] Preferably, a tube connected to the temperature measuring sleeve is fixedly connected to the outer wall of the lower end of the temperature measuring sleeve near the threading tube, and the cooling coil rests on the tube.

[0010] Preferably, a heat insulating pad is inserted and fixed in the shell cover on the upper side of the cooling coil, and the heat insulating pad is inserted on the temperature measuring sleeve.

[0011] Preferably, the liquid inlet pipe and the liquid outlet pipe are both L-shaped, and the liquid inlet pipe and the liquid outlet pipe are respectively inserted into the guide cover and the heat insulation pad.

[0012] The beneficial effects of the utility model are:

[0013] The axial flow fan is provided with a temperature sensor temperature measurement structure at the bottom of the motor housing, which can monitor the temperature inside the motor and thus realize fault warning; at the same time, a guide cover is provided around the temperature sensor temperature measurement structure to reduce the influence of airflow on the temperature sensor. Description of the drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model in partial section;

[0015] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0016] Figure 3 It is a schematic diagram of the structure of the internal cooling coil of the utility model when viewed from above.

[0017] In the figure: 1. air guide tube; 2. motor; 21. shell cover; 3. motor bracket; 4. impeller; 5. temperature sensor; 6. threading tube; 7. cooling coil; 71. liquid inlet pipe; 72. liquid outlet pipe; 8. temperature measuring sleeve; 9. tube; 10. insulation pad; 11. air guide cover; 12. protective tube; 13. nut; 14. nut; 15. rubber gasket; 16. positioning block; 17. support rod. Specific implementation method:

[0018] Example: See Figures 1 to 3 As shown, an axial flow fan for fault warning based on motor temperature includes a vertical air guide 1, a vertical motor 2 and an impeller 4 are respectively inserted in the upper and lower parts of the air guide 1, the impeller 4 is fixedly connected to the rotating shaft of the motor 2, a plurality of motor brackets 3 are fixedly connected to the outer wall of the motor 2 housing, the outer ends of the motor brackets 3 are respectively fixedly connected to the inner wall of the air guide 1, a circular shell cover 21 is fixedly connected to the upper end of the motor 2 housing, a vertical temperature measuring sleeve 8 is inserted and fixed in the middle of the shell cover 21, the upper end of the temperature measuring sleeve 8 extends out of the shell cover 21 and is screwed with a temperature sensor 5, and the probe of the temperature sensor 5 faces the inside of the motor 2 housing;

[0019] A horizontal threading tube 6 is fixedly connected to the outer wall of the temperature measuring sleeve 8 on the upper side of the motor 2, the outer end of the threading tube 6 is plugged and fixed on the air guide tube 1, and the wiring of the temperature measuring sleeve 8 is inserted in the threading tube 6; a conical air guide cover 11 is fixedly connected to the shell cover 21 through a plug sleeve, and the threading tube 6 is inserted on the air guide cover 11.

[0020] An L-shaped protective tube 12 is fixedly connected to the outer wall of the threading tube 6 near the temperature measuring sleeve 8. The protective tube 12 is connected to the threading tube 6. The wiring on the temperature measuring sleeve 8 passes through the protective tube 12 and is inserted into the threading tube 6. Because the temperature sensor 5 is L-shaped, the upper end of the protective tube 12 is close to the wiring outlet on the temperature sensor 5; the protective tube 12 and the temperature sensor 5 are both located in the air guide cover 11.

[0021] A thread is formed on the outer wall of the outer end of the threading tube 6, and the outer end of the threading tube 6 extends out of the air guide tube 1 and is screwed with a nut 13. A nut 14 is screwed on the threading tube 6 on the inner side of the air guide tube 1, and a rubber gasket 15 is clamped between the nut 14 and the inner wall of the air guide tube 1. The rubber gasket 15 is inserted into the threading tube 6. The above is a specific fixed connection between the threading tube 6 and the air guide tube 1.

[0022] The lower part of the temperature measuring sleeve 8 is inserted in the shell cover 21 and is inserted with a spiral and horizontal cooling coil 7. The two ends of the cooling coil 7 are bent to form a liquid inlet pipe 71 and a liquid outlet pipe 72 respectively. The liquid inlet pipe 71 and the liquid outlet pipe 72 pass through the shell cover 21 and are respectively inserted on the air guide tube 1. The air guide tube 1 is fixedly connected with a positioning block 16. The liquid inlet pipe 71 and the liquid outlet pipe 72 are both plugged and fixed on the positioning block 16; the lower end of the temperature measuring sleeve 8 is located at the lower side of the cooling coil 7 and is fixedly connected with a plurality of horizontal support rods 17. The cooling coil 7 is against the support rods 17. The cooling coil 7 is supported by the support rods 17 to realize that the cooling coil 7 is arranged inside the upper side of the motor 2; the cooling coil 7 adopts a copper pipeline; when the temperature sensor 5 detects that the temperature inside the motor reaches the early warning temperature measurement point, the cooling coil 7 arranged inside the motor 2 is started in time, and the coolant is transported through the cooling coil 7 to realize the rapid cooling and heat dissipation inside the motor 2 by liquid cooling;

[0023] The outer wall of the lower end of the temperature measuring sleeve 8 close to the threading tube 6 is fixedly connected with a tube 9 connected to the temperature measuring sleeve 8, and the cooling coil 7 rests on the tube 9; the wiring inside the motor can be connected to the outside through the tube 9, the temperature measuring sleeve 8 and the threading tube 6, but the wiring inside the temperature measuring sleeve 8 needs to be tightened so as not to affect the temperature measurement of the temperature sensor 5.

[0024] A heat insulating pad 10 is inserted and fixed in the shell cover 21 on the upper side of the cooling coil 7 , and the heat insulating pad 10 is inserted and sleeved on the temperature measuring sleeve 8 .

[0025] The liquid inlet pipe 71 and the liquid outlet pipe 72 are both L-shaped, and the liquid inlet pipe 71 and the liquid outlet pipe 72 are respectively inserted into the guide cover 11 and the heat insulation pad 10.

[0026] Working principle: This utility model is an axial flow fan that performs fault warning based on motor temperature, such as Figure 1 As shown, the arrow in the figure is the airflow direction. The axial flow fan mainly installs a temperature measuring sleeve 8 on the shell cover 21 of the motor 2. The temperature measuring sleeve 8 can be installed with a temperature sensor 5. The temperature sensor 5 can measure the temperature inside the motor 2. When the temperature inside the motor 2 reaches the warning temperature, timely feedback can be given for warning.

[0027] In the subsequent heat dissipation treatment method in the present technical solution, liquid cooling is used to accelerate the heat dissipation inside the motor 2. A vortex-shaped cooling coil 7 is arranged inside the shell cover 21, and cooling liquid is passed through the cooling coil 7 to accelerate the heat dissipation based on liquid cooling.

[0028] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. An axial flow fan for fault warning based on motor temperature, comprising a vertical air guide tube (1), wherein a vertical motor (2) and an impeller (4) are respectively inserted into the upper and lower parts of the air guide tube (1), wherein the impeller (4) is fixedly connected to the rotating shaft of the motor (2), and a plurality of motor brackets (3) are fixedly connected to the outer wall of the motor (2) housing, wherein the outer ends of the motor brackets (3) are respectively fixedly connected to the inner wall of the air guide tube (1), wherein: A circular shell cover (21) is fixedly connected to the upper end of the motor (2) housing, a vertical temperature measuring sleeve (8) is inserted and fixed in the middle of the shell cover (21), the upper end of the temperature measuring sleeve (8) extends out of the shell cover (21) and is screwed with a temperature sensor (5), and the probe of the temperature sensor (5) faces the interior of the motor (2) housing; A horizontal threading tube (6) is fixedly connected to the outer wall of the temperature measuring sleeve (8) on the upper side of the motor (2), the outer end of the threading tube (6) is plugged and fixed on the air guide tube (1), and the wiring of the temperature measuring sleeve (8) is inserted into the threading tube (6); a conical air guide cover (11) is fixedly connected to the shell cover (21) through a plug sleeve, and the threading tube (6) is inserted into the air guide cover (11).

2. The axial flow fan with fault warning based on motor temperature according to claim 1 is characterized in that: An L-shaped protective tube (12) is fixedly connected to the outer wall of the threading tube (6) close to the temperature measuring sleeve (8); the protective tube (12) and the threading tube (6) are connected; the wiring on the temperature measuring sleeve (8) passes through the protective tube (12) and is inserted into the threading tube (6); the protective tube (12) and the temperature sensor (5) are both located in the air guide cover (11).

3. The axial flow fan with fault warning based on motor temperature according to claim 1 is characterized in that: The outer wall of the outer end of the threading tube (6) is formed with a thread, the outer end of the threading tube (6) extends out of the air guide tube (1) and is screwed with a nut (13), a nut (14) is screwed on the threading tube (6) inside the air guide tube (1), a rubber gasket (15) is sandwiched between the nut (14) and the inner wall of the air guide tube (1), and the rubber gasket (15) is inserted and sleeved on the threading tube (6).

4. The axial flow fan with fault warning based on motor temperature according to claim 1 is characterized in that: The lower part of the temperature measuring sleeve (8) is inserted into the shell cover (21) and is sleeved with a spiral and horizontal cooling coil (7). The two ends of the cooling coil (7) are respectively bent to form a liquid inlet pipe (71) and a liquid outlet pipe (72). The liquid inlet pipe (71) and the liquid outlet pipe (72) pass through the shell cover (21) and are respectively inserted into the air guide tube (1). The air guide tube (1) is fixedly connected with a positioning block (16). The liquid inlet pipe (71) and the liquid outlet pipe (72) are both inserted and fixed on the positioning block (16); the lower end of the temperature measuring sleeve (8) is located on the lower side of the cooling coil (7) and is fixedly connected with a plurality of horizontal support rods (17). The cooling coil (7) rests on the support rods (17).

5. The axial flow fan with fault warning based on motor temperature according to claim 4 is characterized in that: A tube holder (9) connected to the temperature measuring sleeve (8) is fixedly connected to the outer wall of the lower end of the temperature measuring sleeve (8) close to the threading tube (6), and the cooling coil (7) is against the tube holder (9).

6. The axial flow fan with fault warning based on motor temperature according to claim 4, characterized in that: A heat insulating pad (10) is inserted and fixed in the shell cover (21) on the upper side of the cooling coil (7), and the heat insulating pad (10) is inserted and sleeved on the temperature measuring sleeve (8).

7. The axial flow fan with fault warning based on motor temperature according to claim 6, characterized in that: The liquid inlet pipe (71) and the liquid outlet pipe (72) are both L-shaped, and the liquid inlet pipe (71) and the liquid outlet pipe (72) are respectively inserted into the flow guide cover (11) and the heat insulation pad (10).

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