Axial flow fan

Abstract

The present application provides an axial flow fan, including a bracket and a fan unit, wherein the fan unit includes a fan main body and a temperature reduction compensation part, the temperature reduction compensation part is located in the direction of the output airflow of the fan main body, and the temperature reduction compensation part is used to perform temperature reduction compensation on the heat treatment parts cooled by the output airflow of the fan main body. The temperature reduction compensation part comprises a first mounting frame, a rotating shaft, a detection rod, and a compensation rod, and uses a number of infrared temperature measuring heads on the detection rod to monitor the surface temperature of the workpiece in real time, and cooperates with the compensation rod to output low-temperature cold air to provide a cooling effect for the area with higher temperature. The axial flow fan provided by the present application can automatically compensate for the area on the workpiece that cools down slowly, improve the cooling effect there, and thereby achieve uniform cooling of the workpiece and improve the heat treatment effect of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to an axial flow fan. Background Art

[0002] In order to improve the mechanical strength of traditional workpieces (such as titanium alloy parts), heat treatment is usually performed, and the workpiece needs to be cooled after heat treatment. The cooling methods include air cooling, furnace cooling, water quenching, oil quenching, furnace cooling, etc. Among them, axial flow fans are usually used to cool the heated workpiece during air cooling. Since the workpiece is prone to slow cooling in some areas (such as thicker areas) during air cooling, the internal crystal structure of the slow cooling area is inconsistent with the crystal structure of other areas, which easily affects the effect of heat treatment. Traditional axial flow fans can only deliver airflow to cool the workpiece as a whole, and cannot specifically improve the cooling effect of the local slow cooling area, which leads to poor air cooling effect of axial flow fans. Summary of the invention

[0003] The purpose of the present invention is to provide an axial flow fan to solve the technical problem that the traditional axial flow fan cannot adjust the local cooling effect according to the temperature of the workpiece during air cooling, resulting in poor heat treatment effect of the workpiece after air cooling by the axial flow fan.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide an axial flow fan, the axial flow fan comprising:

[0005] A support, wherein the support is a frame structure;

[0006] at least one fan unit, the fan unit being arranged on the bracket, the fan unit comprising a fan main body and a temperature reduction compensation part, the temperature reduction compensation part being located in the direction of the output airflow of the fan main body, the temperature reduction compensation part being used to perform temperature reduction compensation on the heat treatment part cooled by the output airflow of the fan main body;

[0007] The temperature reduction compensation part includes a first mounting frame, a rotating shaft, a detection rod, and a compensation rod. The first mounting frame is fixed on the bracket, and the rotating shaft can be rotatably set on the first mounting frame. The detection rod and the compensation rod are both set on the rotating shaft. The detection rod is provided with a plurality of infrared temperature measuring heads. A cavity is provided in the compensation rod. Low-temperature cold air is introduced into the cavity of the compensation rod through a cold air pipe. The compensation rod is provided with an electronic nozzle corresponding to the infrared temperature measuring head one by one. The electronic nozzle is connected to the cavity in the compensation rod. The infrared temperature measuring head is electrically connected to the electronic nozzle. The infrared temperature measuring head controls the opening and closing of the electronic nozzle.

[0008] In one embodiment, the cross-sections of the detection rod and the compensation rod are streamlined.

[0009] In one embodiment, the temperature reduction compensation part also includes an angle adjustment mechanism, which is arranged on the rotating shaft, and is electrically connected to the infrared temperature measuring head, and is used to adjust the compensation rod to adjust the size of the windward surface of the compensation rod.

[0010] In one embodiment, the angle adjustment mechanism includes an adjusting motor, which is arranged on the rotating shaft. The outer surface of the root of the compensation rod is provided with external teeth. The adjusting motor is connected to the external teeth of the compensation rod by gear meshing, and the adjusting motor is electrically connected to the infrared temperature measuring head.

[0011] In one embodiment, the fan body comprises:

[0012] A shell, the shell is fixed on the bracket and is cylindrical;

[0013] a second mounting frame, the second mounting frame being fixed to the housing;

[0014] A main motor, wherein the main motor is fixed on the second mounting frame;

[0015] The fan blades are fixed on the motor shaft of the main motor.

[0016] In one embodiment, the bracket includes a main frame and legs arranged at the bottom of the main frame.

[0017] In one embodiment, a connecting rib is fixed to the inner side of the corner of the main frame, one side of the connecting rib is provided with an arc-shaped edge that matches the outer shell, and the connecting rib is fixedly connected to the outer shell.

[0018] In one embodiment, safety shields are provided on the front and rear sides of the housing.

[0019] One or more of the above technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0020] The axial flow fan provided by the embodiment of the present invention cools down the workpiece by conveying airflow through the fan unit, and a cooling compensation part is arranged in the direction of the output end of the fan unit, the rotating shaft in the cooling compensation part is rotatably arranged on the bracket by means of a first mounting frame, and the detection rod and the compensation rod are respectively connected to the rotating shaft, and under the action of the wind force output by the fan unit, the detection rod and the compensation rod are rotated by the wind force, and the infrared temperature measuring head arranged on the detection rod can monitor the surface temperature of the workpiece in the front cooling process in real time, and because the detection rod is in a rotating state, the infrared temperature measuring head on the detection rod can rotate around the rotating shaft to form a circular monitoring area to cover the workpiece, thereby realizing real-time monitoring of the workpiece in air cooling, and at the same time The compensation rod similarly arranged on the rotating shaft also rotates with the detection rod. When the infrared temperature measuring head on the monitoring rod detects that the temperature of a certain area of ​​the workpiece is higher than that of other positions (indicating that the cooling effect at that location is poor and heat is accumulated), the infrared temperature measuring head controls the electronic nozzles corresponding to the compensation rod to open, so that the low-temperature cold air in the compensation rod is output outward. After the low-temperature cold air is output, the airflow output by the fan unit moves in a straight line along the axis of the fan, so that the low-temperature cold air can flow toward the higher temperature area detected by the infrared temperature measuring head under the airflow, until the low-temperature cold air contacts the area and improves the cooling effect of the area, so that the area and other areas of the workpiece can be cooled synchronously, thereby improving the effect of heat treatment of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of an axial flow fan provided by an embodiment of the present invention;

[0023] Figure 2 An internal structural diagram of an axial flow fan provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a single fan unit provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of an angle adjustment mechanism provided by an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of the compensation rod and the airflow direction before adjustment;

[0027] Figure 6This is a schematic diagram of the compensation rod after adjustment and the direction of airflow.

[0028] The respective reference numerals are as follows:

[0029] 1. Bracket; 2. Fan unit; 3. Low-temperature cooling air pipe; 4. Rotating connecting device; 11. Main frame; 12. Support legs; 13. Connecting ribs; 14. Safety shield; 21. Fan body; 22. Cooling compensation part; 211. Casing; 212. Second mounting frame; 213. Main motor; 214. Fan blades; 221. First mounting frame; 222. Rotating shaft; 223. Detection rod; 224. Compensation rod; 225. Angle adjustment mechanism; 2241. Cavity; 2242. Electronic nozzle; 2251. Adjustment motor; 2252. External teeth. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figures 1 to 3 The embodiment of the present application provides an axial flow fan, comprising a bracket 1 and at least one fan unit 2. The bracket 1 is a frame structure. The fan unit 2 is arranged on the bracket 1, and the fan unit 2 comprises a fan body 21 and a temperature reduction compensation part 22. The temperature reduction compensation part 22 is located in the direction of the output airflow of the fan body 21, and the temperature reduction compensation part 22 is used to perform temperature reduction compensation on the heat treatment part cooled by the output airflow of the fan body 21. The cooling compensation part 22 includes a first mounting frame 221, a rotating shaft 222, a detection rod 223, and a compensation rod 224. The first mounting frame 221 is fixed on the bracket 1, and the rotating shaft 222 can be rotatably set on the first mounting frame 221. The detection rod 223 and the compensation rod 224 are both set on the rotating shaft 222. A plurality of infrared temperature measuring heads are arranged on the detection rod 223, and a cavity 2241 is arranged in the compensation rod 224. Low-temperature cold air is introduced into the cavity 2241 of the compensation rod 224 through a cold air pipe. An electronic nozzle 2242 corresponding to the infrared temperature measuring head is arranged on the compensation rod 224. The electronic nozzle 2242 is connected to the cavity 2241 in the compensation rod 224, and the infrared temperature measuring head is electrically connected to the electronic nozzle 2242. The infrared temperature measuring head controls the opening and closing of the electronic nozzle 2242.

[0035] The axial flow fan provided in this embodiment cools the workpiece by conveying airflow through the fan unit 2, and a cooling compensation part 22 is arranged in the direction of the output end of the fan unit 2. The rotating shaft 222 in the cooling compensation part 22 can be rotatably arranged on the bracket 1 by means of the first mounting frame 221, and the detection rod 223 and the compensation rod 224 are respectively connected to the rotating shaft 222. Under the action of the wind force output by the fan unit 2, the detection rod 223 and the compensation rod 224 are rotated by the wind force, and the infrared temperature measuring head arranged on the detection rod 223 can monitor the surface temperature of the workpiece in the front cooling process in real time, and because the detection rod 223 is in a rotating state, the infrared temperature measuring head on the detection rod 223 can rotate around the rotating shaft 222 to form a circular monitoring area to cover the workpiece, thereby realizing the workpiece in air cooling. The parts are monitored in real time, and the compensation rod 224, which is also arranged on the rotating shaft 222, also rotates with the detection rod 223. When the infrared temperature measuring head on the monitoring rod detects that the temperature of a certain area of ​​the workpiece is higher than that of other positions (indicating that the cooling effect at that location is not good and heat is accumulated), the infrared temperature measuring head controls the electronic nozzles 2242 corresponding to the compensation rods 224 to open, so that the low-temperature cold air in the compensation rod 224 is output outward. After the low-temperature cold air is output, the airflow output by the fan unit 2 moves in a straight line along the axis of the fan, so that the low-temperature cold air can flow toward the higher temperature area detected by the infrared temperature measuring head under the airflow, until the low-temperature cold air contacts the area and improves the cooling effect of the area, so that the area and other areas of the workpiece are cooled synchronously, thereby improving the effect of heat treatment of the workpiece.

[0036] like Figure 3 As shown, the detection rod 223 can be set at the front end of the compensation rod 224, so that there is a certain angle difference between the compensation rod 224 and the detection rod 223. When the low-temperature cold air is released from the electronic nozzle 2242 of the compensation rod 224, there is also a tangential speed along the rotation direction of the compensation rod 224 (the rotation speed of the compensation rod 224 is slow, so its tangential speed is slow). Therefore, when the low-temperature cold air moves along the direction of the air flow output by the fan main body 21, there is also a tangential speed. In order to neutralize the tangential speed, the compensation rod 224 is set behind the movement direction of the detection rod 223, and the relationship between the corresponding electronic nozzle 2242 and the infrared temperature measuring head is that the infrared temperature measuring head is located in the tangential direction of the circular motion of the electronic nozzle 2242. By setting the detection rod 223 at the front end of the compensation rod 224 and making a certain angle difference between the compensation rod 224 and the detection rod 223, the low-temperature cold air output by the electronic nozzle 2242 on the compensation rod 224 can be more accurately moved to the abnormal temperature drop area (higher temperature area) detected by the infrared temperature measuring head, thereby improving the compensation accuracy of the temperature drop compensation part 22.

[0037] Without considering the air resistance, assuming that the angle between the compensation rod 224 and the detection rod 223 is α, the air flow velocity output by the fan main body 21 is v, the distance between the cooling compensation part 22 and the workpiece is L, the rotation speed of the compensation rod 224 and the detection rod 223 is w, the distance between the electronic nozzle 2242 and the rotating shaft 222 is R, the tangential speed of the low-temperature cold air is wR, and the distance between the infrared temperature measuring head and the rotating shaft 222 is r, then the distance x between the electronic nozzle 2242 and the infrared temperature measuring head is That is r·sinα, the time required for the airflow to move from the cooling compensation part 22 to the workpiece surface is t=L / v, therefore, (L / v)·wR=r·sinα, so it can be obtained that sinα=wRL / (r·v), therefore, it can be known that Since the airflow velocity v is proportional to the rotation speed w of the compensation rod 224 and the detection rod 223 (the faster the airflow velocity, the faster the rotation speed of the compensation rod 224 and the detection rod 223), it can be seen that the value of w·L / v is only related to L. Therefore, when the distance between the cooling compensation part 22 and the workpiece is fixed, it can be calculated according to The value of the angle α between the compensation rod 224 and the detection rod 223 is accurately calculated.

[0038] like Figure 5 As shown, in one embodiment, the cross-section of the detection rod 223 and the compensation rod 224 is streamlined. Specifically, the cross-section of the detection rod 223 and the compensation rod 224 can be triangular. By setting the cross-section of the detection rod 223 and the compensation rod 224 to a streamlined structure, the turbulence effect of the detection rod 223 and the compensation rod 224 on the airflow output by the fan main body 21 is reduced, so that the airflow cools the workpiece.

[0039] In one embodiment, the temperature reduction compensation part 22 further includes an angle adjustment mechanism 225, which is disposed on the rotating shaft 222. The angle adjustment mechanism 225 is electrically connected to the infrared temperature measuring head. The angle adjustment mechanism 225 is used to adjust the compensation rod 224 to adjust the size of the windward surface of the compensation rod 224. By using the angle adjustment mechanism 225 to adjust the size of the windward surface of the compensation rod 224, when the detection rod 223 does not detect the presence of an abnormal temperature reduction area on the workpiece, the angle adjustment mechanism 225 adjusts the angle of the compensation rod 224 so that the windward surface of the compensation rod 224 increases (such as Figure 6The compensation rod 224 is subjected to greater wind force, thereby increasing the rotation speed of the compensation rod 224 and the detection rod 223, so that the cooling compensation part 22 is in a patrol state. The rotation speed of the detection rod 223 in this state is relatively fast, so that the time required for the detection rod 223 to complete a detection (rotate one circle) is shorter, which is conducive to quickly discovering the abnormal cooling area (high temperature area). When the infrared temperature measuring head on the detection rod 223 finds the abnormal cooling area, the angle adjustment mechanism 225 adjusts the angle of the compensation rod 224 at this time, so that the windward surface of the compensation rod 224 is lowered, so that the cooling compensation part 22 is in a compensation state. The rotation speed of the compensation rod 224 in this state is relatively slow, so that the low-temperature cold air output by the electronic nozzle 2242 on the compensation rod 224 can flow to the abnormal cooling area more accurately along the airflow. By setting the angle adjustment mechanism 225, the windward surface area of ​​the compensation rod 224 is adjusted according to different situations using the angle adjustment mechanism 225. Thus, the compensation accuracy and timeliness of the cooling compensation part 22 are improved.

[0040] like Figure 4 As shown, in one embodiment, the angle adjustment mechanism 225 includes an adjustment motor 2251, which is arranged on the rotating shaft 222, and the outer surface of the root of the compensation rod 224 is provided with an outer tooth 2252, and the adjustment motor 2251 is connected to the outer tooth 2252 of the compensation rod 224 by gear meshing, and the adjustment motor 2251 is electrically connected to the infrared temperature measuring head. When the adjustment motor 2251 is running, it can drive the compensation rod 224 to rotate, thereby adjusting the angle of the compensation rod 224, and thereby adjusting the size of the windward surface of the compensation rod 224.

[0041] In addition, the angle adjustment mechanism 225 can also be composed of a cylinder and a connecting rod. The cylinder can be hinged and fixed on the rotating shaft 222. The end of the cylinder piston rod is hinged to the connecting rod, and the other end of the connecting rod is hinged to the compensation rod 224. When the cylinder piston rod moves, the compensation rod 224 can also be rotated to adjust the size of the windward surface of the compensation rod 224.

[0042] In one embodiment, the fan body 21 includes a housing 211, blades 214, a main motor 213, and a second mounting frame 212. The housing 211 is fixed to the bracket 1, and the housing 211 is cylindrical; the second mounting frame 212 is fixed to the housing 211; the main motor 213 is fixed to the second mounting frame 212; and the blades 214 are fixed to the motor shaft of the main motor 213. When the fan body 21 is working, the main motor 213 drives the blades 214 to rotate, thereby generating airflow.

[0043] In one embodiment, the bracket 1 includes a main frame 11 and a support leg 12 disposed at the bottom of the main frame 11 .

[0044] like Figure 1As shown, in one embodiment, a connecting rib 13 is fixed to the inner side of the corner of the main frame 11, and one side of the connecting rib 13 is provided with an arc-shaped edge that matches the outer shell 211, and the connecting rib 13 is fixedly connected to the outer shell 211. By providing the connecting rib 13 on the inner side of the corner of the main frame 11, the connecting rib 13 is used to improve the stability of the main frame 11 (the connecting rib 13 acts as a reinforcing rib). In addition, an arc-shaped edge is provided on one side of the connecting rib 13 and is matched and connected to the outer shell 211 of the fan body (the connection can be performed by welding), so that the fan body 21 can be more firmly installed on the main frame 11. This improves the overall stability of the axial flow fan during operation.

[0045] In one embodiment, the front and rear sides of the housing 211 are provided with safety shields 14. The safety shield 14 is a porous mesh structure, which can prevent debris or personnel from entering the rotating area of ​​the fan unit 2 by mistake, thereby improving the working safety of the axial flow fan.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An axial flow fan, characterized in that: The axial flow fan comprises: A support, wherein the support is a frame structure; at least one fan unit, the fan unit being arranged on the bracket, the fan unit comprising a fan main body and a temperature reduction compensation part, the temperature reduction compensation part being located in the direction of the output airflow of the fan main body, the temperature reduction compensation part being used to perform temperature reduction compensation on the heat treatment part cooled by the output airflow of the fan main body; The temperature reduction compensation part includes a first mounting frame, a rotating shaft, a detection rod, and a compensation rod. The first mounting frame is fixed on the bracket, and the rotating shaft can be rotatably set on the first mounting frame. The detection rod and the compensation rod are both set on the rotating shaft. The detection rod is provided with a plurality of infrared temperature measuring heads. A cavity is provided in the compensation rod. Low-temperature cold air is introduced into the cavity of the compensation rod through a cold air pipe. The compensation rod is provided with an electronic nozzle corresponding to the infrared temperature measuring head one by one. The electronic nozzle is connected to the cavity in the compensation rod. The infrared temperature measuring head is electrically connected to the electronic nozzle. The infrared temperature measuring head controls the opening and closing of the electronic nozzle.

2. An axial flow fan according to claim 1, characterized in that: The cross sections of the detection rod and the compensation rod are streamlined.

3. An axial flow fan according to claim 1, characterized in that: The temperature reduction compensation part also includes an angle adjustment mechanism, which is arranged on the rotating shaft and electrically connected to the infrared temperature measuring head. The angle adjustment mechanism is used to adjust the compensation rod to adjust the size of the windward surface of the compensation rod.

4. An axial flow fan according to claim 3, characterized in that: The angle adjustment mechanism includes an adjustment motor, which is arranged on the rotating shaft. The outer surface of the root of the compensation rod is provided with external teeth. The adjustment motor is connected to the external teeth of the compensation rod by gear meshing. The adjustment motor is electrically connected to the infrared temperature measuring head.

5. The axial flow fan according to claim 1, characterized in that: The fan main body comprises: A shell, the shell is fixed on the bracket and is cylindrical; a second mounting frame, the second mounting frame being fixed to the housing; A main motor, wherein the main motor is fixed on the second mounting frame; The fan blades are fixed on the motor shaft of the main motor.

6. An axial flow fan according to claim 5, characterized in that: The bracket comprises a main frame and supporting legs arranged at the bottom of the main frame.

7. An axial flow fan according to claim 6, characterized in that: A connecting rib is fixed to the inner side of the corner of the main frame, and an arc-shaped edge matching the outer shell is arranged on one side of the connecting rib, and the connecting rib is fixedly connected to the outer shell.

8. An axial flow fan according to claim 5, characterized in that: The front and rear sides of the shell are provided with safety shields.

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