Fan leaf anti-collision mechanism and industrial large fan

Abstract

Fan blade anti-collision mechanism and industrial large fan, the fan blade fixing seat and the motor fixing seat are rotatably connected; the inner end of the fan blade fixing seat is pulled tightly with the motor fixing seat through the extension spring; the fan blade fixing seat and the motor fixing seat are respectively provided with a position sensor and a corresponding baffle; when the fan blade encounters an obstacle during operation, the fan blade fixing seat rotates reversely until the baffle is separated from the position sensor, the position sensor sends a signal to the controller to stop the motor from operating. When the fan encounters an external obstacle during operation, the spring tension in the blade fixing seat can be overcome to rotate by a certain angle, and when the position sensor senses that the blade works abnormally, the system automatically stops the fan from operating, thereby avoiding that the fan blade encounters an external obstacle during rotation, causing the blade to be damaged, to fall and other major safety accidents.

Description

Technical Field

[0001] This invention relates to the field of industrial fan machinery, specifically to a fan blade anti-collision mechanism used in the industrial field, and an industrial large fan having the aforementioned fan blade anti-collision mechanism. Background Technology

[0002] Industrial fans are widely used in large spaces such as warehouses and workshops to replace traditional air conditioners, thereby improving indoor air circulation and achieving purposes such as lowering indoor temperature and regulating humidity. Due to their weight, industrial fans are typically suspended overhead in warehouses and workshops, placing extremely high demands on their safety. Accidents, including falling fan parts and broken fan blades due to external impact, can cause significant losses to personnel, equipment, and property. Summary of the Invention

[0003] To address the existing problems, this invention aims to provide a blade anti-collision mechanism and an industrial large fan.

[0004] To achieve the above objectives, the technical solution adopted in this invention includes a fan motor mounting base driven to rotate by a motor, and a fan blade mounting base connected to the outer end of the fan blade mounting base. It also includes a rotating pin and a tension spring, wherein the inner end of the fan blade mounting base facing away from the rotation direction is rotatably connected to the motor mounting base; the inner end of the fan blade mounting base is also tensioned to the motor mounting base by the tension spring; the fan blade mounting base and the motor mounting base are respectively equipped with a position sensor and a corresponding baffle, and the position sensor is communicatively connected to the controller that controls the motor; when the fan blade encounters obstruction during operation, the fan blade mounting base rotates in the opposite direction until the baffle disengages from the position sensor, and the position sensor sends a signal to the controller to stop the motor operation.

[0005] Preferably, the two ends of the tension spring are connected to the fan blade mounting base and the motor mounting base respectively via pins.

[0006] Preferably, the fan blade mounting base and the motor mounting base are rotatably connected by a rotating pin.

[0007] Preferably, the tension spring is disposed in the inner cavity of the fan blade fixing seat and the motor fixing seat, and the inner cavity is located on both sides of the contact surface of the fan blade fixing seat and the motor fixing seat respectively.

[0008] Preferably, the fan blade mounting base and the motor mounting base are each provided with a corresponding connecting block, and the connecting block is provided with a through hole; after the through holes of the two connecting blocks overlap, a rotatable connection is achieved by inserting a rotating pin.

[0009] Preferably, the position sensor determines the angle / position of the fan blade holder's reverse rotation by whether light emitted towards the baffle is reflected back.

[0010] Preferably, the position sensor and the baffle are mounted at the position

[0011] Preferably, the position sensor communicates with the controller via a wireless network.

[0012] The present invention also provides an industrial large fan, including the above-mentioned blade anti-collision mechanism.

[0013] Compared with the prior art, the present invention provides a fan blade anti-collision mechanism. When the fan blades encounter external obstacles during operation, the blades can overcome the spring tension in the blade fixing seat and rotate a certain angle. When the position sensor detects the abnormal operation of the blades, the system automatically stops the fan, thereby avoiding major safety accidents such as blade damage or falling due to the fan blades encountering external obstacles during rotation. The mechanism is reliable and easy to maintain. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an industrial fan according to an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of a fan mounting bracket;

[0016] Figure 3 for Figure 2 State diagram of part A when subjected to external collision force;

[0017] Figure 4 for Figure 2 A partial cross-sectional view of section A in the middle;

[0018] Figure 5 , 6 This is a schematic diagram of the fan blade anti-collision mechanism in normal operation.

[0019] Figure 7 , 8 This is a schematic diagram of the fan blade anti-collision mechanism encountering external resistance.

[0020] Figure 9 This is a schematic diagram of a large industrial fan.

[0021] The attached figures are labeled as follows: fan mounting assembly 100, fan blade mounting 101, motor mounting 102, tension spring 103, position sensor 104, rotating pin 105, sensor baffle 106, pin I 107, pin II 108, fan blade 200, drive motor 300. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] See Figures 1 to 8 , Figures 1 to 8This is one embodiment of the invention. See also Figure 1 The diagram shows a partial structural view of a large industrial fan capable of housing five blades, representing a first embodiment of the present invention. It includes a fan mounting assembly 100 and five fan blades 200, with a rotational speed of 60 revolutions per minute. Various other devices are also present, but their illustrations and descriptions are omitted below.

[0024] See Figure 2 The fan mounting assembly 100 includes a motor mounting base 102, five fan blade mounting bases 101, and corresponding mounting points for five fan blades 200. The connection methods of the five fan blade mounting bases 101 and the motor mounting base 102 are completely identical; the following description will focus only on one of the blades (…). Figure 2 The scope of section A provides a detailed description of the fan blade anti-collision mechanism.

[0025] See Figure 3 When the fan blade 200 encounters an obstacle, the fan blade mounting base 101 and the motor mounting base 102 will change position. See [link / reference] Figure 4 The fan blade mounting base 101 and the motor mounting base 102 are connected by a rotating pin 105, which is fixed with a cotter pin. The rotating pin 105 is positioned on the side opposite to the direction of rotation, allowing the fan blade mounting base 101 to rotate relative to the motor mounting base 102 around the rotating pin 105. Pins I107 and II108 are respectively provided in the grooves (i.e., cavities) on both sides of the contact surface of the fan blade mounting base 101 and the motor mounting base 102. The two ends of the tension spring 103 are fixed to pins I107 and II108 respectively. The tension of the tension spring 103 in a stretched state pulls the fan blade mounting base 101 and the motor mounting base 102 together, forming a fixed connection and allowing them to rotate together.

[0026] See Figure 5 and Figure 6 This is a structural diagram of the fan blade anti-collision mechanism in normal operating condition. The fan blade mounting base 101 and the motor mounting base 102 are connected by a rotating pin 105. Preferably, the fan blade mounting base 101 and the motor mounting base 102 are each provided with a corresponding connecting block, and the connecting block has a through hole; after the through holes of the two connecting blocks overlap, a rotatable connection is achieved by inserting the rotating pin 105.

[0027] A position sensor 104 (preferably an optical sensor) is mounted on the motor mounting base 102, and a sensor baffle 106 is provided on the corresponding fan blade mounting base 101 to detect the working status of the fan blade 200 fixed on the fan blade mounting base 101. When the fan blade 200 is operating normally, the tension of the tension spring 103 tightly connects the fan blade mounting base 101 and the motor mounting base 102. At this time, the position sensor baffle 106 is in the position of blocking the sensor 104, and the light emitting end of the sensor 104 is blocked by the position sensor baffle 106, and the sensor is in the off state.

[0028] See also Figure 7 and Figure 8 This diagram illustrates the working state of the fan blade anti-collision mechanism when the blades encounter external resistance. The fan rotates in the direction of the arrow in the diagram. When the fan blade mounting base 101 or the fixed fan blade 200 (not shown in this diagram) encounters an external obstacle, rotation is hindered, and the external impact force causes the fan blade mounting base 101 to rotate in the opposite direction relative to the motor mounting base 102 around the rotating pin 105. A key point to note in this embodiment is that, based on the collected and statistical analysis of external impact forces, a suitable tensile strength of the tension spring 103 is determined to ensure that the tension spring 103 can be stretched when subjected to an external impact force sufficient to damage the fan blade 200, while simultaneously ensuring that the fan blade 200 has sufficient mechanical strength to prevent breakage or other major damage when subjected to the aforementioned external impact force. The determination of the tensile strength can be made according to specific design requirements through limited conventional experiments combined with common knowledge.

[0029] See Figure 8 As the fan blade mounting base 101 rotates, the position sensor baffle 106 moves away from the position that could block the position sensor 104. If the light emitting end of the position sensor 104 is not blocked by the position sensor baffle 106, the position sensor 104 is in the ON state. After receiving the ON state signal of the position sensor 104 via the wireless network, the controller / control system automatically cuts off the power and stops the fan, thereby preventing damage and accidents caused by external forces to the fan blades 200.

[0030] The fan blades 200 of a conventional large fan are usually rigidly connected. When they encounter obstacles at high speeds, they can suffer extensive damage, and falling fragments can cause serious accidents. Furthermore, the drive motor 300 continues to supply power when a conventional large fan encounters an obstacle, which can cause the drive motor 300 to stall and lead to secondary damage. This embodiment uses a tension spring 103 to provide some cushioning to the fan blades 200 upon impact with an obstacle, while simultaneously stopping the power supply to the drive motor 300. Although the fan blades 200 may still suffer some damage upon impact, it will not cause serious breakage or falling debris. Additionally, a certain amount of reverse torque can be set and controlled to provide to the drive motor 300 at this time, facilitating a faster stop of the fan.

[0031] See Figure 9 The industrial fan provided in the second embodiment of the present invention has the blade anti-collision mechanism of the aforementioned embodiment. Five fan blades 200 are respectively fixed to the five blade fixing seats 101 of the fan fixing seat assembly 100. One end of the drive motor 300 is fixed to the fan fixing seat assembly 100, and the other end is fixed to a location such as the ceiling. Its technical features and functional effects are similar to those of the aforementioned embodiments, and therefore will not be repeated; it also includes many other devices, which will not be detailed here either.

[0032] The above description of the anti-collision mechanism for fan blades and an embodiment of an industrial fan using the mechanism provided by the present invention is only for the purpose of helping to understand the method and core idea of ​​the present invention. For those skilled in the art, several improvements can be made to the present invention without departing from the principle of the present invention, and these improvements also fall within the protection scope of the claims of the present invention.

Claims

1. A blade anti-collision mechanism, wherein the motor mounting base of a fan is driven to rotate by a motor, and the outer end of the fan blade mounting base is connected to the fan blade, characterized in that: Further comprising a rotating pin shaft and a tension spring, wherein: the inner end of the fan blade fixing seat is reversely connected with the motor fixing seat in the rotating direction; The inner end of the fan blade fixing seat is reversely connected with the motor fixing seat in the rotating direction; The fan blade fixing seat and the motor fixing seat are respectively provided with a position sensor and a corresponding baffle, and the position sensor is in communication connection with a controller for controlling the motor; When the fan blade encounters an obstacle during operation, the fan blade fixing seat reversely rotates until the baffle is out of contact with the position sensor, the position sensor sends a signal to the controller to stop the motor from operating.

2. A blade anti-collision mechanism according to claim 1, characterised in that: The fan blade fixing seat and the motor fixing seat are reversely connected through a rotating pin shaft.

3. The blade anti-collision mechanism according to claim 1, characterized in that: The fan blade fixing seat and the motor fixing seat are respectively provided with corresponding connecting blocks, and the connecting blocks are provided with through holes; the two connecting blocks are reversely connected through the rotating pin shaft inserted into the through holes.

4. The blade anti-collision mechanism according to claim 1, characterized in that: The position sensor determines the angle / position of the reversely rotating fan blade fixing seat by whether the light emitted by the position sensor is reflected back.

5. The blade anti-collision mechanism according to claim 1, characterized in that: The position sensor is in communication connection with the controller through a wireless network.

6. An industrial fan characterized by: The fan blade anti-collision mechanism comprises the fan blade anti-collision mechanism according to any one of claims 1-5.

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