An industrial fan

Abstract

The present invention relates to an industrial fan, including a plurality of blades, a wheel, a reduction motor, a frame and a suspension rod, wherein the blades include an upper layer and a lower layer, which are formed by bending once, wherein there is a gap between the upper layer and the lower layer; the blades are connected to the petioles by a connecting piece; the connecting piece is formed with left and right concentric sleeves arranged at intervals, and a special-shaped piece is embedded inside the two sleeves, and a vibration-isolating rubber sleeve is sleeved on the special-shaped piece, so that the outer wall of the special-shaped piece and the inner wall of the sleeve are separated by the vibration-isolating rubber sleeve; the petiole is inserted between the two concentric sleeves and connected to the shaft between the connecting pieces; an anti-falling ring is sleeved on the flange below the frame; the inner diameter of the anti-falling ring is smaller than the outer diameter of the flange, and the outer diameter is larger than the outer diameter of the flange; the anti-falling ring is connected to the blade petiole. The present invention has a wide wind coverage, low energy efficiency, long service life, low working noise, and can effectively prevent the blades from falling.

Description

Technical Field

[0001] The invention relates to an industrial fan. Background Art

[0002] Industrial fans are widely used in industrial plants, logistics warehouses, waiting rooms, exhibition halls, supermarkets and other tall spaces as the preferred solution for space ventilation and personnel cooling. The comfort brought by super-large energy-saving fans is unmatched by other fans. Under the super-large energy-saving fans, you will feel three-dimensional air supply from all directions, thus covering the entire body, maximizing the sweat evaporation surface, and forming a breeze system similar to nature.

[0003] The quality of a fan is mainly judged from aspects such as wind coverage, energy consumption, noise level, service life and safety. However, it is difficult for current fans to possess all or most of the advantages, and there is still a lack of high-performance fan market. Summary of the invention

[0004] The purpose of the present invention is to provide an industrial fan with wide wind coverage, low energy efficiency, long service life, low working noise and effective prevention of blade falling in order to solve the above problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] An industrial fan includes a plurality of fan blades, a wheel disc, a reduction motor, a frame and a suspension rod. The fan blades are fixed to the wheel disc through a blade handle. For details of the wheel disc structure, please refer to Chinese Patent No.: 201620580298.2. The reduction motor drives the wheel disc to rotate and drives the fan blades to rotate.

[0007] The fan blade comprises an upper layer and a lower layer, which are formed by bending once, wherein there is a gap between the upper layer and the lower layer;

[0008] The fan blade and the petiole are connected by a connecting piece; the connecting piece is formed with two left and right concentric sleeves spaced apart from each other, a special-shaped piece is embedded inside the two sleeves, and a vibration-isolating rubber sleeve is sleeved on the special-shaped piece, so that the outer wall of the special-shaped piece and the inner wall of the sleeve are separated by the vibration-isolating rubber sleeve; the petiole is inserted between the two concentric sleeves and connected to the shaft between the connecting piece;

[0009] An anti-falling ring is hung on the flange below the frame; the inner diameter of the anti-falling ring is smaller than the outer diameter of the flange, while the outer diameter is larger than the outer diameter of the flange; the anti-falling ring is connected to the fan blade petiole.

[0010] Furthermore, the lower layer of the fan blade is connected to the upper layer on one side as a whole, and overlapped with the upper layer on the other side.

[0011] Furthermore, the gap between the upper and lower layers of the fan blade gradually decreases from the blade tail to the blade tip.

[0012] Furthermore, a seal is provided on the outer end surface of the sleeve.

[0013] Furthermore, a buffer pad is arranged between the special-shaped part and the blockage.

[0014] Furthermore, a bolt hole is provided on the anti-falling ring, and a corresponding bolt hole is also provided on the blade handle, and the two are connected by bolts.

[0015] Furthermore, it also includes a swinging guide mechanism which is arranged at both ends of the hanger, including two pairs of upper and lower connecting plates, and a bolt hole and an arc groove are arranged on the connecting plates; the hanger is a square tube, and two bolt holes are arranged on two opposite sides of one end thereof, corresponding to the bolt holes and the arc groove on the connecting plate respectively, and the two connecting plates are movably fixed to the hanger by bolts; similarly, two bolt holes are also arranged on the other two opposite sides of the other end of the hanger, and the two connecting plates are movably fixed to the hanger by bolts.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. The fan blades adopt a double-layer design with gaps between layers, which is similar to the shape of an airplane wing. It is more in line with the equal chord length theory of aerodynamics. The wind volume from the root to the tip of the blade is more uniform along the length of the fan blade, with a larger air volume and no holes in the middle; the wind coverage is wider.

[0018] 2. The vibration isolation rubber sleeve installed in the connector can absorb part of the vibration from the fan blades, improve the working condition of the reduction motor shaft, extend the life of the reduction motor, and make the operation quieter. The service life of the vibration isolation rubber sleeve is more than 5 years. When the vibration isolation rubber sleeve is aged, only a new vibration isolation rubber sleeve needs to be put on without replacing other parts. It is easy to replace and has low maintenance cost.

[0019] 3. The anti-fall ring connects all the fan blades as a whole. If the fan blades fall as a whole, the anti-fall ring will hang on the flange of the frame to prevent the fan blades from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall structure diagram of the present invention;

[0021] Figure 2 This is a structural diagram of the rack according to the present invention;

[0022] Figure 3 This is an enlarged view of the fan blade structure of the present invention;

[0023] Figure 4 This is a split structure diagram of the connector of the present invention;

[0024] Figure 5 This is an enlarged view of the anti-falling structure part of the present invention;

[0025] Figure 6 This is a front view of the split structure of the swing guide mechanism of the present invention;

[0026] Figure 7 It is a left view of the split structure of the swing guide mechanism of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 7 As shown, an industrial fan comprises a plurality of blades 1, a wheel disc 2, a reduction motor 3, a frame 4, a suspension rod 5 and a housing 6, wherein the blade 1 is fixed to the wheel disc 2 through a blade stalk 11, and the reduction motor 3 drives the wheel disc 2 to rotate to drive the blade 1 to rotate, and the frame 4 comprises a door-shaped frame 41 and a flange 42, wherein the flange 42 is fixed below the door-shaped frame 41, and the center of the flange 42 is directly opposite to the middle position of the upper crossbeam of the door-shaped frame 41; the reduction motor 3 is fixed to the flange 42, and a rotating shaft through hole is set at the center of the flange 42; the suspension rod 5 is connected and fixed to the upper crossbeam of the door-shaped frame 41;

[0029] like Figure 3 As shown, the fan blade 1 includes an upper layer and a lower layer (the upper and lower layers are distinguished according to the actual installation situation), which are bent into shape at one time. The lower layer of the fan blade 1 is connected to the upper layer on one side and overlapped with the upper layer on the other side.

[0030] There is a gap between the upper and lower layers of the fan blade 1, and the gap gradually decreases from the blade root to the blade tip. The width of the fan blade 1 also gradually decreases from the blade root to the blade tip, and the shape is the same as that of an airplane wing, which is more in line with the equal chord length theory of aerodynamics. The air volume supplied downward from the blade root to the blade tip along the length direction of the fan blade 1 is more uniform, the air volume is larger, and there is no cavity in the middle.

[0031] The fan blades are designed with variable cross-section to produce maximum air volume and cover a larger area, which is similar to natural wind and more comfortable.

[0032] like Figure 4As shown, the fan blade 1 is connected to the petiole 11 through a connecting piece 12; the connecting piece 12 is formed with two left and right concentric sleeves 121 arranged at intervals; a special-shaped piece 122 is embedded in the two sleeves 121, a plug 123 is arranged on the outer end surface, and a buffer pad 124 is arranged between the special-shaped piece 122 and the plug 123; a vibration isolation rubber sleeve 125 is sleeved on the special-shaped piece 122, so that the outer wall of the special-shaped piece 122 and the inner wall of the sleeve 121 are separated by the vibration isolation rubber sleeve 125, and the vibration isolation rubber sleeve 125 can absorb part of the vibration from the fan blade 1, improve the working condition of the reduction motor 3 shaft, extend the service life of the reduction motor 3, and run more quietly; the petiole 11 is inserted between the two concentric sleeves 121, and the connecting shaft passes through the sleeve 121, the petiole 11, and the sleeve 121 in sequence to connect the petiole 11 to the connecting piece shaft.

[0033] Due to the addition of the vibration isolation rubber sleeve 125, the blades of the fan 1 are horizontal when stopped. During operation, the blade tip of the fan 1 may be tilted up to 3° at most according to the rotation speed of the fan, thereby releasing the pressure and resistance during operation, reducing the torque output by the motor, reducing power consumption, and saving energy. At the same time, the blade tip is tilted up to 3 degrees more than the blade root, improving the airflow delivered by the fan to the ground from a cylindrical shape to a conical shape, thereby expanding the coverage of the fan.

[0034] like Figure 5 As shown, it also includes an anti-falling ring 7, whose inner diameter is smaller than the outer diameter of the flange 42, and whose outer diameter is larger than the outer diameter of the flange 42; the anti-falling ring 7 is hung on the flange 42 and is arranged overhead; bolt holes are arranged on the anti-falling ring 7, and corresponding bolt holes are also arranged on the petiole 11 of the fan blade 1, and the two are connected by bolts 71; wherein the screw rod of the bolt 71 passes through the anti-falling ring 7, and the position of the anti-falling ring 7 is positioned by the upper and lower nuts to ensure that the anti-falling ring 7 does not contact the flange 42. With such a structural design, the anti-falling ring 7 connects the fan blade 1 as a whole. If the fan blade 1 falls as a whole, the anti-falling ring 7 will be hung on the flange 42 of the frame 4.

[0035] like Figures 6-7 As shown, it also includes a swing guide mechanism which is arranged at both ends of the suspension rod 5, including two pairs of upper and lower connecting plates 8, and a bolt hole 81 and an arc groove 82 are arranged on the connecting plate 8; the suspension rod 5 is a square tube, and two bolt holes are correspondingly arranged on two opposite sides of one end thereof, corresponding to the bolt holes 81 and the arc groove 82 on the connecting plate 8 respectively, and the two connecting plates 8 are movably fixed to the suspension rod 5 by bolts; similarly, two bolt holes are also arranged on the other two opposite sides of the other end of the suspension rod 5, and the two connecting plates 8 are movably fixed to the suspension rod 5 by bolts.

[0036] The above description is only a preferred embodiment of the present invention and is 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 industrial fan, comprising a plurality of blades, a wheel disc, a reduction motor, a frame and a suspension rod, wherein the blades are fixed to the wheel disc through a blade handle, and the reduction motor drives the wheel disc to rotate to drive the blades to rotate, characterized in that: The fan blade comprises an upper layer and a lower layer, which are formed by bending once, wherein there is a gap between the upper layer and the lower layer; The fan blade and the petiole are connected by a connecting piece; the connecting piece is formed with two left and right concentric sleeves spaced apart from each other, a special-shaped piece is embedded inside the two sleeves, and a vibration-isolating rubber sleeve is sleeved on the special-shaped piece, so that the outer wall of the special-shaped piece and the inner wall of the sleeve are separated by the vibration-isolating rubber sleeve; the petiole is inserted between the two concentric sleeves and connected to the shaft between the connecting piece; An anti-falling ring is hung on the flange below the frame; the inner diameter of the anti-falling ring is smaller than the outer diameter of the flange, while the outer diameter is larger than the outer diameter of the flange; the anti-falling ring is connected to the blade petiole of the fan blade; The outer end surface of the sleeve is provided with a plug; A buffer pad is arranged between the special-shaped member and the plugging; A bolt hole is provided on the anti-falling ring, and a corresponding bolt hole is also provided on the fan blade handle, and the two are connected by bolts; It also includes a swinging guide mechanism which is arranged at both ends of the suspension rod, including two pairs of upper and lower connecting plates, and a bolt hole and an arc groove are arranged on the connecting plates; the suspension rod is a square tube, and two bolt holes are arranged on two opposite sides of one end thereof, corresponding to the bolt holes and the arc groove on the connecting plate respectively, and the two connecting plates are movably fixed to the suspension rod by bolts; similarly, two bolt holes are also arranged on the other two opposite sides of the other end of the suspension rod, and the two connecting plates are movably fixed to the suspension rod by bolts.

2. An industrial fan according to claim 1, characterized in that: The lower layer of the fan blade is connected to the upper layer on one side as a whole, and overlapped with the upper layer on the other side.

3. An industrial fan according to claim 1, characterized in that: The gap between the upper and lower layers of the fan blade gradually decreases from the blade tail to the blade tip.

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