An ultra-low hub ratio axial flow fan impeller

Abstract

The present invention discloses an ultra-low hub ratio axial flow fan impeller, comprising a hub and a rotating hub cover, a rotating hub cover is buckled on one side wall of the hub, a second hexagonal screw is threadedly connected at the contact point between the hub and the rotating hub cover, a second anti-loosening pad is arranged between the second hexagonal screw and the rotating hub cover, the second anti-loosening pad and the second hexagonal screw are sleeve-connected, a cup-type brake pad is fixedly assembled inside the hub, a blade is arranged inside the cup-type brake pad, and a positioning pin is fixedly assembled at the bottom end of the blade. The ultra-low hub ratio axial flow fan impeller is threadedly connected with the hub and the rotating hub cover by the second hexagonal screw, so that the rotating hub cover is installed on the hub, the blade is placed inside the hub port and abuts against the cup-type brake pad, and the hub adapter is buckled on the hub, so as to achieve the effect of generating a higher static pressure at the air outlet and increasing the wind flow area, thereby realizing the benefit of improving the efficiency of the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of fan impellers, and specifically to ultra-low hub-ratio axial flow fan impellers. Background Art

[0002] With the construction of expressways entering the western plateau area, after the tunnel is opened to traffic, if there is a change in traffic flow, other fans must be added to meet the changes in traffic conditions. Super-long expressway tunnels are constantly appearing, which puts higher and higher demands on the ventilation operation of expressway tunnels and the difficulty of tunnel shaft construction. This further requires us to minimize the number of tunnel shafts and the ventilation efficiency requirements of super-large fans are getting higher and higher. At present, the hub ratio of super-large fan structure is greater than 0.4, which leads to a relatively large hub in the fan barrel, reducing the flow area and greatly reducing the ventilation efficiency. Summary of the invention

[0003] The object of the present invention is to provide an axial flow fan impeller with an ultra-low hub ratio to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-low hub ratio axial flow fan impeller, comprising a hub and a rotating hub cover, a rotating hub cover being buckled on one side wall of the hub, a second hexagonal screw being threadedly connected to the contact point between the hub and the rotating hub cover, a second anti-loosening pad being provided between the second hexagonal screw and the rotating hub cover, the second anti-loosening pad and the second hexagonal screw being sleeve-connected, a cup-type brake pad being fixedly assembled inside the hub, a blade being provided inside the cup-type brake pad, a locating pin being fixedly assembled on the bottom end of the blade, the locating pin passing through the cup-type brake pad, a nut being threadedly connected to one end of the locating pin located outside the cup-type brake pad, a hub adapter being provided on the other side wall of the hub, a bolt being passed through the connection between the hub adapter and the hub, the bolt passing through the hub and the hub adapter, an installation space being formed between the hub adapter and the hub, and the bolt being located at the installation The outer wall at one end of the space is threadedly connected with a nut, and the first anti-loosening washer is provided on one side of the bolt located outside the wheel hub adapter and on one side inside the wheel hub, the first anti-loosening washer and the bolt are sleeved and connected, the first anti-loosening washer is located between the nut and the wheel hub and between the bolt and the wheel hub adapter, a wheel hub retainer is provided at the center of the wheel hub adapter where it is in contact with the wheel hub, screws are penetrated at the center of the wheel hub retainer and the wheel hub adapter, the screws are threadedly connected to the wheel hub retainer and the wheel hub adapter, a stop washer is sleeved on the outer wall of the screw located on the outside of the wheel hub retainer, a first hexagonal screw is penetrated on one side wall of the wheel hub close to the wheel hub adapter, the first hexagonal screw is located on both sides of the inside and outside of the wheel hub and are respectively provided with a hexagonal nut and a first gasket, the hexagonal nut is threadedly connected to the first hexagonal screw, and a shock-proof washer and a second gasket are provided between the hexagonal nut and the inner side wall of the wheel hub from the inside to the outside.

[0005] Preferably, the processing diameter of the hub is 1000MM, and 18 ports with a diameter of 81MM are opened on the hub.

[0006] Preferably, the hub adapter is made of steel with a diameter of 125MM.

[0007] Preferably, the length of the blade is 3150MM.

[0008] Compared with the prior art, the beneficial effects of the present invention are: an ultra-low hub ratio axial flow fan impeller, a second hexagonal screw is threadedly connected to the hub and the rotating hub cover, so that the rotating hub cover is installed on the hub, the blades are placed inside the hub port and are in contact with the cup brake pad, and are installed through the threaded connection of the nut, the hub adapter is buckled on the hub, and the hub retainer is installed between the two, and the fixation is completed by the connection of the screws, and the output end is connected to the hub through the first hexagonal screw, the processing diameter of the hub is 1000MM, the length of the blade is 3150MM, and the hub ratio is less than 0.4, which increases the area of ​​wind flow, the hub ratio is small (usually less than 0.35), the internal flow area of ​​the fan is large, the flow resistance is small, the effect of generating a higher static pressure at the outlet to increase the wind flow area, and the benefit of improving the efficiency of the fan is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention;

[0010] Figure 2 It is a schematic diagram of the structure of the interior of the present invention from the side;

[0011] Figure 3 for Figure 2 A schematic diagram of the structure of the enlarged view of point A;

[0012] Figure 4 for Figure 3 Schematic diagram of the structure of the enlarged view of point B.

[0013] In the figure: 1-wheel hub, 2-blade, 3-wheel hub adapter, 4-rotating wheel hub cover, 5-second anti-loosening washer, 6-second hexagon screw, 7-cup brake pad, 8-first gasket, 9-first hexagon screw, 10-first anti-loosening washer, 11-bolt, 12-vibration-proof washer, 13-nut, 14-wheel hub retainer, 15-stop washer, 16-screw, 17-hexagon nut, 18-nut, 19-second gasket, 20-locating pin. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-4The present invention provides a technical solution: an ultra-low hub ratio axial flow fan impeller, comprising a hub 1 and a rotating hub cover 4, wherein the hub 1 is the hub of the fan impeller, the rotating hub cover 4 protects the surface of one side wall of the hub 1, the rotating hub cover 4 is buckled with one side wall of the hub 1, a second hexagonal screw 6 is threadedly connected at the contact point between the hub 1 and the rotating hub cover 4, the second hexagonal screw 6 is threadedly connected to the hub 1 and the rotating hub cover 4 so that the two are connected, a second anti-loosening pad 5 is arranged between the second hexagonal screw 6 and the rotating hub cover 4, the second anti-loosening pad 5 and the second hexagonal screw 6 are sleeve-connected, the second anti-loosening pad 5 cushions the junction between the second hexagonal screw 6 and the rotating hub cover 4 to fill the space, increase the tightness of the connection of the second hexagonal screw 6, and prevent loosening, the hub 1 A cup brake pad 7 is fixedly assembled inside, and the filling of the cup brake pad 7 increases the installation tightness of the blade 2. A blade 2 is arranged inside the cup brake pad 7, and a positioning pin 20 is fixedly assembled at the bottom end of the blade 2, and the positioning pin 20 passes through the cup brake pad 7. One end of the positioning pin 20 located outside the cup brake pad 7 is threadedly connected with a nut 18. The blade 2 is the main body of the impeller that generates airflow, and the positioning pin 20 positions the blade 2 to the inside of the cup brake pad 7. A hub adapter 3 is arranged on the other side wall of the hub 1, and the hub adapter 3 blocks the other end of the hub 1 and is used to connect to the output end. A bolt 11 is penetrated at the connection between the hub adapter 3 and the hub 1, and the bolt 11 passes through the hub 1 and the hub adapter 3. An installation space is formed between the hub adapter 3 and the hub 1, and the bolt The outer wall of one end of the bolt 11 located inside the installation space is threadedly connected with a nut 13, and a first anti-loosening washer 10 is provided on one side of the bolt 11 located outside the wheel hub adapter 3 and one side inside the wheel hub 1. The first anti-loosening washer 10 and the bolt 11 are sleeved and connected. The connection between the nut 13 and the bolt 11 enables the wheel hub 1 and the wheel hub adapter 3 to be connected. The filling of the first anti-loosening washer 10 increases the tightness of the connection between the nut 13 and the bolt 11. The first anti-loosening washer 10 is located between the nut 13 and the wheel hub 1 and between the bolt 11 and the wheel hub adapter 3. A wheel hub retainer 14 is provided at the center of the wheel hub adapter 3 where it is in contact with the wheel hub 1. The wheel hub retainer 14 stabilizes the connection between the wheel hub 1 and the wheel hub adapter 3 and prevents deformation. The center of the wheel hub retainer 14 and the wheel hub adapter 3 are both penetrated by a threaded washer. The screw 16 is threadedly connected with the hub holder 14 and the hub adapter 3 to connect the two. The outer wall between the screw 16 and the hub holder 14 is sleeved with a locking washer 15. The locking washer 15 prevents the connection of the screw 16 from loosening. A first hexagonal screw 9 is provided on one side wall of the hub 1 close to the hub adapter 3. The first hexagonal screw 9 is located on the inner and outer sides of the hub 1. A hexagonal nut 17 and a first gasket 8 are provided respectively. The hexagonal nut 17 is threadedly connected with the first hexagonal screw 9. A shockproof washer 12 and a second gasket 19 are provided between the hexagonal nut 17 and the inner side wall of the hub 1 from the inside to the outside. The two are connected so that the output end is fully connected to the hub 1. The first gasket 8 and the second gasket 19 protect the hub 1 to prevent the first hexagonal screw 9 from being squeezed and damaged.The provision of the anti-vibration washer 12 reduces the vibration from the hub 1 and the output end.

[0016] Specifically, the processing diameter of the hub 1 is 1000MM. The diameter of 1000MM is used to reduce the hub ratio, and 18 ports with a diameter of 81MM are opened on the hub 1.

[0017] Specifically, the hub adapter 3 is made of steel with a diameter of 125 MM, which increases the strength of the hub adapter 3 .

[0018] Specifically, the length of the blade 2 is 3150 MM, and the hub ratio formed by the length of the blade 2 and the diameter of the hub 1 is less than 0.4.

[0019] Working principle: In the present invention, the rotating hub cover 4 is covered on one side of the wheel hub 1, and the second hexagonal screw 6 is threadedly connected to the wheel hub 1 and the rotating hub cover 4, so that the rotating hub cover 4 is installed on the wheel hub 1, and the blade 2 is placed inside the port of the wheel hub 1 and is in contact with the cup brake pad 7, and is installed through the threaded connection of the nut 18, the wheel hub adapter 3 is buckled on the wheel hub 1, and the wheel hub retainer 14 is installed between the two, and the fixing is completed by the connection of the screw 16, the bolt 11 passes through the wheel hub 1 and the wheel hub adapter 3, and the wheel hub adapter 3 is installed by the connection of the nut 13 and the bolt 11, and the output end is connected to the wheel hub 1 through the first hexagonal screw 9.

[0020] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-low hub ratio axial flow fan impeller, comprising a hub (1) and a rotating hub cover (4), characterized in that: A rotating hub cover (4) is buckled on one side wall of the wheel hub (1); a second hexagonal screw (6) is threadedly connected to the contact point between the wheel hub (1) and the rotating hub cover (4); a second anti-loosening pad (5) is provided between the second hexagonal screw (6) and the rotating hub cover (4); the second anti-loosening pad (5) and the second hexagonal screw (6) are sleeve-connected; a cup-shaped brake pad (7) is fixedly mounted inside the wheel hub (1); a blade (2) is provided inside the cup-shaped brake pad (7); a positioning pin (20) is fixedly mounted at the bottom end of the blade (2); the positioning pin (20) penetrates the cup The wheel hub (1) is provided with a wheel hub adapter (3), and a bolt (11) is provided at a connection point between the wheel hub adapter (3) and the wheel hub (1). The bolt (11) passes through the wheel hub (1) and the wheel hub adapter (3). An installation space is formed between the wheel hub adapter (3) and the wheel hub (1), and an outer wall of one end of the bolt (11) located inside the installation space is threadedly connected to a nut (13). The bolt (11) is located at the wheel hub adapter. (3) A first anti-loosening washer (10) is provided on one side of the outside of the wheel hub (1) and one side of the inside of the wheel hub (1). The first anti-loosening washer (10) and the bolt (11) are sleeve-connected. The first anti-loosening washer (10) is located between the nut (13) and the wheel hub (1) and between the bolt (11) and the wheel hub adapter (3). A wheel hub retainer (14) is provided at the center of the wheel hub adapter (3) where it contacts the wheel hub 1. Screws (16) are provided at the centers of the wheel hub retainer (14) and the wheel hub adapter (3). The screws (16) are connected to the wheel hub retainer (14) and the wheel hub adapter (3). ) are threadedly connected, the screw (16) is sleeved with a locking washer (15) on the outer wall of the wheel hub retainer (14), a first hexagonal screw (9) is penetrated through a side wall of the wheel hub (1) close to the wheel hub adapter (3), the first hexagonal screw (9) is located on the inner and outer sides of the wheel hub (1) and is respectively provided with a hexagonal nut (17) and a first gasket (8), the hexagonal nut (17) is threadedly connected to the first hexagonal screw (9), and a shock-proof washer (12) and a second gasket (19) are sequentially provided between the hexagonal nut (17) and the inner side wall of the wheel hub (1) from the inside to the outside.

2. The ultra-low hub ratio axial flow fan impeller according to claim 1, characterized in that: The processing diameter of the wheel hub (1) is 1000 MM, and 18 ports with a diameter of 81 MM are opened on the wheel hub (1).

3. The ultra-low hub ratio axial flow fan impeller according to claim 1, characterized in that: The wheel hub adapter (3) is made of steel with a diameter of 125 MM.

4. The ultra-low hub ratio axial flow fan impeller according to claim 1, characterized in that: The length of the blade (2) is 3150MM.

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