Efficient ventilation axial flow fan

Abstract

The invention provides an efficient ventilation axial flow fan, and relates to the field of axial flow fan devices, the efficient ventilation axial flow fan is characterized in that the efficient ventilation axial flow fan comprises a pile casing, a driving blade and a flow guide blade, the pile casing is cylindrical, the two ends of the pile casing are provided with openings, the lower end of the pile casing is fixedly provided with a mounting frame, the upper end of the mounting frame is fixedly provided with a motor, the driving blade is located above the motor, and the flow guide blade is located above the motor. A mounting disc is fixed to the position, on the inner side of the pile casing, of the circle center of the driving blade, the axis of the mounting disc and a motor shaft are coaxial and tightly connected with each other, the flow guide blade is located behind the driving blade, the blade direction of the flow guide blade is opposite to the blade direction of the driving blade, and a mounting disc is fixed to the position of the circle center of the flow guide blade. A bearing seat is fixed to the position of the through hole in the inner side of the mounting disc and rotationally connected with the connecting shaft, and the flow guide blade is used for increasing the air inlet amount of the driving blade. The device has the advantages that the device structure is simplified, the production cost is reduced, meanwhile, the air inlet and outlet efficiency is improved, and noise pollution is reduced.

Description

Technical Field

[0001] The invention relates to the field of axial flow fan devices, and in particular to a high-efficiency ventilation axial flow fan. Background Art

[0002] Axial flow fans are devices that can circulate and exchange air with high efficiency and are widely used in indoor and outdoor ventilation or cooling towers. With the development of production technology, axial flow fan-related devices will pursue lower energy consumption and less noise to reduce the cost of use and reduce noise pollution. However, when the axial flow fan is running, the motor will drive the fan blades to rotate at high speed. In order to reduce the vibration of the device caused by the rotation of the fan blades, existing technologies and products often solve such problems by adding multiple shock-absorbing mechanisms or further improving the precision of parts. However, this solution will further increase the overall production cost of the device. At the same time, in order to ensure the inlet and outlet air volume, the high-speed rotating fan will also bring certain noise, which cannot meet the existing use needs. Summary of the invention

[0003] The purpose of the present invention is to provide a high-efficiency ventilation axial flow fan, which solves the technical problems of high production cost and low air inlet and outlet working efficiency in the prior art, and achieves the technical effect of reducing the production cost of the device and improving the air inlet and outlet working efficiency.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A high-efficiency ventilation axial flow fan comprises a casing, an active blade and a guide blade. The casing is cylindrical in shape with openings at both ends. A mounting frame is fixed to the lower end of the casing, and a motor is fixed to the upper end of the mounting frame. The active blade is located at the shaft output end of the motor and on the inner side of the casing. A mounting disk is fixed at the center position of the active blade, and a connecting shaft is fixed at the axial position of the mounting disk for transmission connection with the rotating shaft of the motor. The guide blade is located between the active blade and the motor, and the blade direction of the guide blade is opposite to the relative rotation direction of the blade of the active blade. A mounting disk is fixed at the center position of the guide blade, and a bearing seat is fixed at the through hole position on the inner side of the mounting disk. The bearing seat is rotatably connected to the connecting shaft, and the guide blade is used to increase the air intake of the active blade.

[0006] As an improvement, the material of the casing is a rust-resistant material, and the inner side of the casing is provided with sound-absorbing cotton. The blades of the active blades and the guide blades are inclined at 20° to 50°, and the surface of the blades has an arc. There are six blades in total, which are evenly distributed around the axis of the connecting shaft as the center of the circle.

[0007] As an improvement, a mounting plate is provided on the side of the blade close to the mounting plate, the upper end surface of the mounting plate is in contact with the blade and is fixedly connected to the blade by bolts, and the mounting plate has two triangular plates on the side away from the blade, the inner side of the triangular plates has mounting holes, the mounting holes are coaxially arranged, and the triangular plates are fixedly connected to the mounting plate by mounting rods.

[0008] As an improvement, the mounting plate has a square hole near the connecting shaft, a limit retaining spring is inserted into the inner side of the square hole, the inner side of the limit retaining spring has a round hole for fixing the position of the mounting rod, two sets of U-shaped screws are provided on the side of the limit retaining spring away from the connecting shaft, a limit block is provided below the U-shaped screw, the limit block is used to limit the height of the mounting rod, the U-shaped screw is plugged and fixed to the mounting rod, and the lower end of the mounting plate has a bolt that is detachably fixed to the U-shaped screw.

[0009] The beneficial effects of the present invention are as follows: by setting up a protective tube structure, the installation of the device can be facilitated, while reducing the direct impact of the rotation of the fan blades on the building or cooling tower; by setting up the guide vanes, the guide vanes can rotate in the opposite direction to the active vanes, further providing air inlet or outlet volume, improving the overall air inlet and outlet working efficiency of the device, and reducing noise pollution under the same air inlet and outlet requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of a high-efficiency ventilation axial flow fan of the present invention;

[0011] Figure 2 A three-dimensional diagram of the fan portion of a high-efficiency ventilation axial flow fan of the present invention;

[0012] Figure 3 A three-dimensional diagram of the connecting shaft portion of a high-efficiency ventilation axial flow fan of the present invention;

[0013] Figure 4 This is a front view of the fan portion of a high-efficiency ventilation axial flow fan of the present invention;

[0014] Figure 5 The figure is a top view of the fan portion of a high-efficiency ventilation axial flow fan of the present invention.

[0015] In the figure: 1. casing; 2. active blade; 3. guide vane; 4. mounting plate; 5. mounting rod; 6. connecting shaft; 7. U-shaped screw; 8. mounting plate; 9. motor; 10. bearing seat; 11. limit spring. DETAILED DESCRIPTION

[0016] In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0017] like Figures 1 to 5 As shown, a high-efficiency ventilation axial flow fan comprises a casing 1, active blades 2 and guide blades 3. The casing 1 is cylindrical in shape with openings at both ends. A mounting frame is fixed to the lower end of the casing 1, and a motor 9 is fixed to the upper end of the mounting frame. The active blade 2 is located above the motor 9 and on the inner side of the casing 1. A mounting disk 8 is fixed at the center position of the active blade 2, and a connecting shaft 6 is fixed at the axial position of the mounting disk 8 for transmission connection with the rotating shaft of the motor 9. The guide blade 3 is located between the active blade 2 and the motor 9. The blade direction of the guide blade 3 is opposite to that of the active blade 2. A mounting disk 8 is fixed at the center position of the guide blade 3, and a bearing seat 10 is fixed at the through hole position inside the mounting disk 8. The bearing seat 10 is rotatably connected to the connecting shaft 6, and the guide blade 3 is used to increase the air intake of the active blade 2. The active blades 2 and guide blades 3 are made of light alloy and have an anti-corrosion coating on their surfaces. The length of a single blade is two fifths of the inner diameter of the casing 1 .

[0018] The material of the casing 1 is stainless steel metal, and the inner side of the casing 1 is provided with sound-absorbing cotton. The blades of the active blade 2 and the guide blade 3 are inclined at 20° to 50°, and the surface of the blade is curved. There are six blades in total, which are equally spaced around the axis of the connecting shaft 6. A mounting plate 4 is provided on the side of the blade close to the mounting plate 8, and the upper end surface of the mounting plate 4 fits the blade and is fixedly connected to the blade by bolts. The side of the mounting plate 4 away from the blade has two triangular plates, and the inner side of the triangular plates has mounting holes, and the mounting holes are coaxially arranged. The triangular plates are fixedly connected to the mounting plate 8 by mounting rods 5. The mounting plate 8 has a square hole near the connecting shaft 6, and a limit clamp 11 is inserted into the inner side of the square hole. The inner side of the limit clamp 11 has a round hole for fixing the position of the mounting rod 5. The side of the limit clamp 11 away from the connecting shaft 6 is provided with two sets of U-shaped screws 7, and a limit block is provided below the U-shaped screw 7. The limit block is used to limit the height of the mounting rod 5. The U-shaped screw 7 is inserted and fixed to the mounting rod 5, and the lower end of the mounting plate 8 has a bolt that is detachably fixedly connected to the U-shaped screw 7. The mounting plate 8 is made of high-strength alloy, and a fixing block is fixedly set at the middle through hole of the mounting plate 8. The fixing block has a mounting groove inside and is fixedly connected to the connecting shaft 6. One side of the connecting shaft 6 has a protrusion for strengthening the fixed connection with the mounting plate 8.

[0019] When in use, the casing 1 part can be combined and fixed with the building wall or the vent position at the upper end of the cooling tower, and the circuit of the motor 9 part can be connected with the corresponding control circuit. When enabled, the shaft of the motor 9 will drive the active blade 2 to rotate. At this time, the active blade 2 will drive the wind to flow in the casing 1. At this time, the flowing wind will also drive the guide blade 3 to rotate in the opposite direction of the active blade 2, further increasing the speed and amount of the flowing wind, thereby improving the overall air intake efficiency of the device. When in use, the active blade 2 and the guide blade 3 cooperate with each other, and the air intake and outlet efficiency of the single set of active blades 2 will be 20% higher than that of the single set of active blades 2 at the same operating power. When the power of the motor 9 reaches the corresponding air intake and outlet standard, the speed of its active blade 2 is low, so the overall noise is small.

[0020] 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 shall be included in the protection scope of the present invention.

Claims

1. A high-efficiency ventilation axial flow fan, It is characterized in that The invention comprises a casing (1), an active blade (2) and a guide blade (3); the casing (1) is cylindrical in shape and has openings at both ends; a mounting frame is fixed at the lower end of the casing (1); a motor (9) is fixed at the upper end of the mounting frame; the active blade (2) is located at the peripheral output end of the motor (9), and a mounting plate (8) is fixed at the inner side of the casing (1) at the center of the active blade (2); a connecting shaft (6) and the motor (9) are fixed at the axial position of the mounting plate (8). The guide vane (3) is connected to the rotating shaft of the motor (9), the guide vane (3) is located between the active vane (2) and the motor (9), the blade direction of the guide vane (3) is opposite to the blade direction of the active vane (2), a mounting plate (8) is fixed at the center position of the guide vane (3), a bearing seat (10) is fixed at the through hole position on the inner side of the mounting plate (8), the bearing seat (10) is rotatably connected to the connecting shaft (6), and the guide vane (3) is used to increase the air intake volume of the active vane (2).

2. A high-efficiency ventilation axial flow fan according to claim 1, It is characterized in that The material of the protective tube (1) is a rust-resistant material, and the inner wall of the protective tube (1) is provided with sound-absorbing cotton. The blades of the active blade (2) and the guide blade (3) are arranged with an inclination of 20° to 50°, and the surface of the blade has an arc. The number of the blades is not less than three, and they are distributed at equal intervals around the axis of the connecting shaft (6) as the center of the circle.

3. A high-efficiency ventilation axial flow fan according to claim 2, It is characterized in that A mounting plate (4) is provided on the side of the blade close to the mounting disk (8); the upper end surface of the mounting plate (4) is in contact with the blade and is fixedly connected to the blade by bolts; the mounting plate (4) has two triangular plates on the side away from the blade; the inner sides of the triangular plates have mounting holes, the mounting holes are coaxially arranged, and the triangular plates are fixedly connected to the mounting disk (8) by mounting rods (5).

4. A high-efficiency ventilation axial flow fan according to claim 3, It is characterized in that The mounting plate (8) has a square hole near the connecting shaft (6), a limiting retaining spring (11) is inserted into the inner side of the square hole, the inner side of the limiting retaining spring (11) has a round hole for fixing the position of the mounting rod (5), two groups of U-shaped screws (7) are provided on the side of the limiting retaining spring (11) away from the connecting shaft (6), a limiting block is provided below the U-shaped screw (7), the limiting block is used to limit the height of the mounting rod (5), the U-shaped screw (7) is plugged and fixed to the mounting rod (5), and the lower end of the mounting plate (8) has a bolt which is detachably fixedly connected to the U-shaped screw (7).

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