CN111810442A

CN111810442A - Fan blower

Info

Publication number: CN111810442A
Application number: CN201910288703.1A
Authority: CN
Inventors: 冯世峰; 袁斌; 吴成刚; 朱剑
Original assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Current assignee: York Guangzhou Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-10-23

Abstract

The application provides a fan, fan includes: a hub and a number of blades. The plurality of blades are arranged around and along the circumference of the hub, the plurality of blades have at least one connecting part connected with the blade root of the blade, each of the plurality of blades is in a T shape or an L shape, and the at least one connecting part is connected with the hub. The fan also comprises a front positioning sleeve and a rear positioning sleeve which are sleeved on the hub. The front positioning sleeve is cylindrical, and the rear end of the front positioning sleeve comprises a plurality of front blade limiting surfaces and a plurality of front joint surfaces; the rear positioning sleeve is cylindrical, and the front end of the rear positioning sleeve comprises a plurality of blade rear limiting surfaces and a plurality of rear joint surfaces. The front positioning sleeve and the rear positioning sleeve are jointed through a plurality of front joint surfaces and a plurality of rear joint surfaces, and a plurality of blade limiting openings are formed between a plurality of blade front limiting surfaces and a plurality of blade rear limiting surfaces; each of the plurality of blades is respectively arranged in a corresponding limiting opening in the plurality of blade limiting openings.

Description

Fan blower

Technical Field

The present application relates to the field of rotary machines such as fans, and more particularly to a mounting structure for fan blades.

Background

In the fan, a plurality of blades are uniformly arranged outside a hub (e.g., an outer rotor of an outer rotor motor) in a circumferential direction. Typically, when installing the blade, the root of the blade is welded directly to the outside of the hub by an operator or machine. This mounting structure and manner of mounting makes it difficult to ensure the accuracy of the mounting of all the blades with respect to the hub and is not easy to mount.

Disclosure of Invention

The application provides a fan of blade with connecting portion for the installation angle, the circumference of pinpoint blade are arranged and axial position.

According to the above, the present application provides a fan, the fan comprising: a hub; a plurality of blades arranged around and along a circumference of the hub; wherein the plurality of blades have at least one connection portion connected to a blade root of the blade, and each of the plurality of blades has a "T" shape or an "L" shape, and the at least one connection portion is connected to the hub.

According to the above, the hub is an outer rotor of an outer rotor motor.

According to the above, the fan further comprises: the front positioning sleeve and the rear positioning sleeve are sleeved on the hub; the front positioning sleeve is cylindrical, and the rear end of the front positioning sleeve comprises a plurality of front blade limiting surfaces and a plurality of front joint surfaces; the front end of the rear positioning sleeve comprises a plurality of blade rear limiting surfaces and a plurality of rear joint surfaces, wherein the front positioning sleeve and the rear positioning sleeve are jointed through the plurality of front joint surfaces and the plurality of rear joint surfaces, and a plurality of blade limiting openings are formed between the plurality of blade front limiting surfaces and the plurality of blade rear limiting surfaces; wherein, each of the several blades is installed in a corresponding spacing mouth among the several blade spacing mouths respectively.

According to the above, the shape of the plurality of blade limiting openings matches the shape of the peripheral profile of the blade root of the plurality of blades.

According to the above, the fan further comprises an end positioning sleeve, the end positioning sleeve comprises a cylinder part and an end cover for sealing one end of the cylinder part, the cylinder part is sleeved on the hub and connected with the front end of the front positioning sleeve, and a hole is formed in the end cover; the front end of the hub has a projection that is connected to the end locator sleeve through a hole in the end cap.

According to the above, the outer surface of the hub is provided with the protruding portion extending in the circumferential direction, and the rear end of the rear positioning sleeve abuts against the protruding portion.

According to the above, the rear locating sleeve is connected to the hub.

According to the above, the rear end of the rear positioning sleeve has a cylindrical portion against which the rear end of the rear positioning sleeve abuts, the cylindrical portion being connected with the projecting portion.

According to the above, the plurality of blade front limiting surfaces and the plurality of front engaging surfaces of the front positioning sleeve are arranged at intervals and extend obliquely relative to the axial direction of the front positioning sleeve in the direction from the front end to the rear end of the front positioning sleeve; the rear blade limiting surfaces and the rear joint surfaces of the rear positioning sleeve are arranged at intervals and extend obliquely relative to the axial direction of the rear positioning sleeve in the direction from the front end to the rear end of the rear positioning sleeve.

According to the above, the at least one connecting portion is two or more connecting portions arranged along the length direction of the blade root, wherein at least one connecting portion of the two or more connecting portions extends toward one side of the blade, and the other connecting portion of the two or more connecting portions extends toward the other side of the blade.

According to the above, the at least one connecting portion extending toward one side of the blade and the other connecting portion extending toward the other side of the blade are provided at intervals.

According to the above, the at least one connecting portion is a connecting portion, the connecting portion includes a first connecting plate extending toward one side of the blade, and a second connecting plate folded over from the first connecting plate and extending toward the other side of the blade, and the second connecting plate is connected to the hub.

According to the above, the at least one connection portion is connected to the hub by a screw, a bolt, or welding.

Drawings

FIG. 1A is a perspective view of one of the fans 100 of the present application;

FIG. 1B is an exploded view of a perspective view of blower 100 shown in FIG. 1A;

FIG. 2 is a perspective view of rear locator sleeve 104 of blower 100 shown in FIG. 1A;

FIG. 3 is a perspective view of forward locating sleeve 102 of blower 100 shown in FIG. 1A;

FIG. 4 is a perspective view of the rear positioning sleeve 104 shown in FIG. 2 and the front positioning sleeve 102 shown in FIG. 3 in an assembled position;

FIG. 5 is a perspective view of a first embodiment of a blade 103 of the wind turbine 100 shown in FIG. 1A;

FIG. 6 is a perspective view of a second embodiment of a blade 603 of the wind turbine 100 shown in FIG. 1A;

FIG. 7 is a perspective view of a third embodiment of a blade 703 of the wind turbine 100 shown in FIG. 1A;

FIG. 8 is a perspective view of forward locating sleeve 102, vane 103 and aft locating sleeve 104 shown in FIGS. 1A-1B in an assembled position;

FIG. 9A is a perspective view of another embodiment of a connection of rear locating sleeve 104 and hub body 106 of wind turbine 100 shown in FIG. 1A;

FIG. 9B is a perspective view of the rear locating sleeve 104 and hub body 106 shown in FIG. 9A in an assembled position;

FIG. 10 is a perspective and partially enlarged view of a fourth embodiment of a blade 1003 of wind turbine 100 shown in FIG. 1A;

FIG. 11 is a perspective and partially enlarged view of an embodiment five of the blade 1103 of the wind turbine 100 shown in FIG. 1A;

FIG. 12 is an exploded and partially enlarged view of another embodiment of a wind turbine 1200 of the present application.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms such as "front," "rear," "upper," "lower," "left," "right," and the like may be used herein to describe various example structural portions and elements of the application, these terms are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting.

Fig. 1A is a perspective view of an embodiment of a wind turbine 100 of the present application, and fig. 1B is an exploded view of the perspective view of the wind turbine 100 shown in fig. 1A, for illustrating various components in the wind turbine 100 and their positional relationships. As shown in fig. 1A and 1B, wind turbine 100 includes end fasteners 113, end locator sleeve 101, forward locator sleeve 102, plurality of blades 103, aft locator sleeve 104, hub 105, and aft fasteners 112. The plurality of blades 103 can be mounted on the hub 105 by end fasteners 113, end locator sleeves 101, forward locator sleeves 102, aft locator sleeves 104, and aft fasteners 112.

Specifically, as shown in fig. 1B, the hub 105 includes a hub body 106 and a projection 107. The hub body 106 is generally cylindrical with a central axis X. The projection 107 is provided at the front end of the hub body 106 coaxially with the hub body 106. When the hub body 106 is rotated, the protrusion 107 can rotate together therewith. The free end 120 of the projection 107 is provided with an external thread arrangement. The rear end of the hub body 106 is provided with a projection 108, and the projection 108 surrounds the circumferential direction of the hub body 106 and extends outward in the radial direction of the hub body 106. The rear retaining sleeve 104 can be fitted over the hub body 106 and the rear end 122 of the rear retaining sleeve 104 can abut the projection 108. The outer diameter of the boss 108 is configured to be larger than the inner diameter of the rear positioning sleeve 104, so that the rear positioning sleeve 104 can abut against the boss 108 without coming out of the rear end of the hub body 106.

As shown in fig. 2, the rear locating sleeve 104 is coaxially disposed with the hub body 106, which also has a central axis X. Rear locating sleeve 104 has a plurality of holes 115 and hub body 106 has corresponding holes 114, such that when rear locating sleeve 104 abuts against boss 108, holes 114 in hub body 106 are aligned with corresponding holes 115 in rear locating sleeve 104. Rear fasteners 112 (e.g., screws, bolts, etc.) can be inserted into holes 114 and their corresponding holes 115 to secure rear locating sleeve 104 to hub body 106.

Those skilled in the art will also appreciate that in some embodiments, the projections 108 may not be provided, and the mounting position of the rear locating sleeve 104 in the axial direction of the hub body 106 is defined by the cooperation of the holes 114, the holes 115, and the rear fasteners 112. It will also be appreciated that the rear locating sleeve 104 may be secured to the hub body 106 by welding or the like, rather than by the rear fasteners 112.

As shown in fig. 3, the front locating sleeve 102 is generally cylindrical, also has a central axis X, and is fitted over the hub body 106 coaxially with the hub body 106. The rear end of the forward locating sleeve 102 may cooperate with the front end of the rear locating sleeve 104 to grip the blade 103. The blade 103 is clamped by the front and

rear bushings

102, 104 and then positioned on the hub body 106. The front end of front retainer sleeve 102 is provided with external threads that mate with internal threads on the rear end of end retainer sleeve 101.

The end portion positioning sleeve 101 includes a cylindrical portion 109 and an end cap 110 that closes one end of the cylindrical portion 109. The rear end of barrel portion 109 is provided with internal threads (not shown) that mate with external threads of front end 305 of front retainer sleeve 102 to couple end retainer sleeve 101 to front retainer sleeve 102. The end cap 110 is provided with a hole 111. The projection 107 of the hub 105 is of a length such that its free end 120 can pass through the aperture 111. End fasteners 113 are nuts that are capable of mating with external thread structures on free ends 120 of tabs 107 to couple front locating sleeve 102 and end locating sleeve 101 to hub body 106.

Those skilled in the art will appreciate that in some embodiments, the forward locating sleeve 102 may be coupled to the hub body 106 in a similar manner (e.g., via the aft fasteners 112) as the aft locating sleeve 104 is coupled to the hub body 106. For example, instead of using end locator sleeve 101 and end fasteners 113, holes may be provided in front locator sleeve 102 and hub body 106, and front locator sleeve 102 may be attached to hub body 106 with fasteners. In such an example, the boss 107 may not be provided on the hub 105.

Those skilled in the art will appreciate that in other embodiments, the forward locating sleeve 102 and the aft locating sleeve 104 may also secure the blade 103 to the hub body 106 in other ways. For example, the front end of the hub body 106 is provided with external threads, the inner surface of the front positioning sleeve 102 is provided with internal threads, the front positioning sleeve 102 is screwed with the hub body 106, and the front positioning sleeve 102 can be moved in the axial direction of the hub body 106 by rotating so as to be capable of being engaged with the rear positioning sleeve 104 without using the end positioning sleeve 101; for another example, a sleeve 109 having a circular ring shape and an internal thread may be provided at the front end of the hub body 106, the sleeve 109 is screwed to the hub body 106, and the sleeve 109 is rotated to translate along the axial direction of the hub body 106 so as to push the front positioning sleeve 102 to translate and cooperate with the rear positioning sleeve 104.

FIG. 2 is a perspective view of rear locator sleeve 104 of blower 100 shown in FIG. 1A to more clearly illustrate the specific structure of rear locator sleeve 104. As shown in fig. 2, the rear locator sleeve 104 includes a cylindrical portion 222 and a plurality of serrations 212 at the rear end 122 of the rear locator sleeve 104. The plurality of serrations 212 extend toward the front end 201 of the rear positioning sleeve 104 at the front end of the cylindrical portion 222. Each of the plurality of serrations 212 is provided with a blade rear limiting surface 202 and a rear engagement surface 203. The number of the blade rear limiting surfaces 202 is the same as that of the blades 103. In the embodiment shown in fig. 1A, the number of blades 103 is 5, and thus the number of serrations 212, the number of rear engagement surfaces 203 and the number of blade rear limiting surfaces 202 are all 5. Each of the sawtooth parts 212 has a tooth top and two tooth bottoms (a left tooth bottom and a right tooth bottom), wherein the plane formed by connecting the tooth top and the left tooth bottom is the blade rear limiting plane 202, and the plane formed by connecting the tooth top and the right tooth bottom is the rear joint plane 203, so that the blade rear limiting plane 202 and the rear joint plane 203 are arranged at intervals, and those skilled in the art can easily think that the number of the blade rear limiting planes 202 is more than the number of the blades 103, but only part of the blade rear limiting planes 202 are used and other blade rear limiting planes 202 are left unused.

Each blade aft limiting surface 202 is shaped to match the shape of the aft surface 514 (shown in fig. 5) of the blade root 503 of the blade 103 so that each blade aft limiting surface 202 can conform to the aft surface 514 of the blade root 503 of the blade 103 when the aft retaining sleeve 104 and the blade 103 are assembled in place. Each blade rear limiting surface 202 and each rear engaging surface 203 extend obliquely with respect to the axial direction of the rear locator sleeve 104 in the direction from the front end 201 to the rear end 122 of the rear locator sleeve 104. In other words, each blade rear limiting surface 202 is disposed obliquely with respect to the central axis X. In the embodiment shown in the present application, each rear engagement surface 203 is also disposed obliquely with respect to the central axis X.

FIG. 3 is a perspective view of forward locating sleeve 102 of blower 100 shown in FIG. 1A, to more clearly illustrate the specific structure of forward locating sleeve 102. As shown in FIG. 3, the front alignment sleeve 102 includes a cylindrical portion 322 at the front end 305 of the front alignment sleeve 102 and a plurality of serrations 312. A plurality of serrations 312 extend from the rear end of the cylindrical portion 322 toward the rear end 301 of the front positioning sleeve 102. Each of the plurality of serrations 312 is provided with a blade front stop surface 302 and a front engagement surface 303. The number of the blade front limiting surfaces 302 is the same as that of the blades 103. In the embodiment shown in fig. 1A, the number of blades 103 is 5, and therefore the number of serrations 312, the number of blade front stop faces 302 and the number of front engagement faces 303 are also 5. Each of the saw tooth portions 312 has a tooth top and two tooth bottoms (a left tooth bottom and a right tooth bottom), wherein a plane formed by connecting the tooth top and the right tooth bottom is a blade front limiting plane 302, and a plane formed by connecting the tooth top and the left tooth bottom is a front joint plane 303, so that the blade front limiting plane 302 and the front joint plane 303 are arranged at intervals, and those skilled in the art can easily think that the number of the blade front limiting planes 302 is more than the number of the blades 103, but only a part of the blade front limiting planes 302 are used, and the other blade front limiting planes 302 are left unused.

The shape of each blade front limiting surface 302 is configured to match the shape of the front surface 512 (shown in fig. 5) of the blade root 503 of the blade 103 so that each blade front limiting surface 302 can conform to the front surface 512 of the blade root 503 of the blade 103 when the front locating sleeve 102 and the blade 103 are fitted in place. Each blade front limiting surface 302 and each front engaging surface 303 extend obliquely with respect to the axial direction of the front positioning sleeve 102 in a direction from the front end 305 to the rear end 301 of the front positioning sleeve 102. In other words, each blade front stopper face 302 is disposed obliquely with respect to the central axis X. In the embodiment shown in the present application, each forward engagement surface 303 is also disposed obliquely with respect to the central axis X.

FIG. 4 is a perspective view of rear alignment sleeve 104 shown in FIG. 2 and forward alignment sleeve 102 shown in FIG. 3 in an assembled position to illustrate the mated relationship of rear alignment sleeve 104 and forward alignment sleeve 102. As shown in fig. 4, when the front and

rear locator sleeves

102, 104 are fitted in place, each of the forward engagement surfaces 303 abuts a corresponding one of the rear engagement surfaces 203, and each of the blade forward limit surfaces 302 cooperates with a corresponding one of the blade rear limit surfaces 202 to form a blade limit opening 401 therebetween. Since the shape of each blade front limiting surface 302 is configured to match the shape of the front surface 512 (shown in fig. 5) of the blade root 503 of the blade 103, and the shape of each blade rear limiting surface 202 is configured to match the shape of the rear surface 514 (shown in fig. 5) of the blade root 503 of the blade 103, the shape of the plurality of blade front limiting surfaces 302 and the plurality of blade rear limiting surfaces 202 defining the plurality of blade limiting openings 401 can match the shape of the peripheral contour of the blade root 503 of the plurality of blades 103.

It will be appreciated by those skilled in the art that the aft positioning sleeve 104 and the forward positioning sleeve 102 are for defining a plurality of blade retention ports 401 for clamping a blade root 503 of the blade 103 to enable the blade 103 to be positioned on the hub body 106 through the aft positioning sleeve 104 and the forward positioning sleeve 102. Therefore, the plurality of rear engagement surfaces 203 on the rear locator sleeve 104 and the plurality of front engagement surfaces 303 on the front locator sleeve 102 may be configured in any shape to maintain sufficient support strength between the rear locator sleeve 104 and the front locator sleeve 102 to clamp the blade 103.

FIG. 5 is a perspective view of a first embodiment of a blade 103 of the wind turbine 100 shown in FIG. 1A, for more clearly illustrating the specific structure of the blade 103. As shown in fig. 5, the blade 103 comprises a blade body 510, a first connection portion 501 and a second connection portion 502. The first connection portion 501 and the second connection portion 502 are located at a blade root 503 of the blade body 510 and are arranged along a length direction of the blade root 503. The first connection portion 501 extends from the root 503 towards a first side of the blade body 510 (i.e. the side where the front surface 512 of the blade body 510 is located), and the second connection portion 502 extends from the root 503 of the blade body 510 towards a second side of the blade body 510 (i.e. the side where the rear surface 514 of the blade body 510 is located). The first and second connection portions 501,502 are substantially arc-shaped in the length direction of the blade root 503. The first and second connection portions 501,502 are substantially "T" shaped with the blade body 510, looking from the side 530 of the blade 103 towards the blade body 510.

The first and second connection portions 501,502 of the blade 103 may be formed by any process known to a person skilled in the art, such as flanging the blade 103 to form the first and second connection portions 501,502, or connecting the first and second connection portions 501,502 to the blade 103 by welding, etc.

Fig. 6 is a perspective view of a second embodiment of a blade 603 of the wind turbine 100 shown in fig. 1A, for more clearly illustrating a specific structure of the blade 603. The blade 603 shown in fig. 6 differs from the blade 103 shown in fig. 5 in that: the blade 603 has three connections, namely: a first connection 601, a second connection 602, and a third connection 604. The first connection portion 601, the second connection portion 602, and the third connection portion 604 are disposed at intervals. The first connection 601 extends from the root 605 of the blade 603 towards a first side of the blade 603, i.e. the side where the front surface 612 of the blade body 610 is located. The second connection 602 and the third connection 604 extend from the root 605 of the blade 603 towards a second side of the blade 603, i.e. the side where the rear surface 614 of the blade body 610 is located. The first connection 601, the second connection 602 and the third connection 604 are substantially arc-shaped in the longitudinal direction of the blade root 605. The first connection portion 601, the second connection portion 602, and the third connection portion 604 are substantially "T" shaped with the blade body 610, as viewed from the side 630 of the blade 603 toward the blade body 610.

The first connection portion 601, the second connection portion 602, and the third connection portion 604 of the blade 603 may be formed by any process known to those skilled in the art, such as flanging the blade 603 to form the first connection portion 601, the second connection portion 602, and the third connection portion 604, or connecting the first connection portion 601, the second connection portion 602, and the third connection portion 604 to the blade 603 by welding or the like.

Fig. 7 is a perspective view of a third embodiment of a blade 703 of the wind turbine 100 shown in fig. 1A, for more clearly illustrating a specific structure of the blade 703. The blade 703 shown in fig. 7 differs from the blade 103 shown in fig. 5 in that: the blade 703 has five connections: a first connection part 701, a second connection part 702, a third connection part 704, a fourth connection part 705, and a fifth connection part 706. The first connection portion 701, the second connection portion 702, the third connection portion 704, the fourth connection portion 705, and the fifth connection portion 706 are provided at intervals. The second connection 702 and the fourth connection 705 extend from a root 707 of the blade 703 towards a first side of the blade 703 (i.e., the side on which the front surface 712 of the blade body 710 is located). The first connection 701, the third connection 704 and the fifth connection 706 extend from a root 707 of the blade 703 towards a second side of the blade 703, i.e. the side where the rear surface 714 of the blade body 710 is located. The first connection 701, the second connection 702, the third connection 704, the fourth connection 705, and the fifth connection 706 are substantially arcuate in shape in the longitudinal direction of the blade root 703. The first connection portion 701, the second connection portion 702, the third connection portion 704, the fourth connection portion 705, and the fifth connection portion 706 are substantially T-shaped with respect to the blade body 710 when viewed from the side 730 of the blade 703 toward the blade body 710.

The first connection portion 701, the second connection portion 702, the third connection portion 704, the fourth connection portion 705 and the fifth connection portion 706 may be formed by any process known to those skilled in the art, such as flanging the blade 703 to form the first connection portion 701, the second connection portion 702, the third connection portion 704, the fourth connection portion 705 and the fifth connection portion 706, or connecting the first connection portion 701, the second connection portion 702, the third connection portion 704, the fourth connection portion 705 and the fifth connection portion 706 to the blade 703 by welding or the like.

It should be understood by those skilled in the art that the number of connections on the blade body is not limited to two, three or five as exemplified herein, and that one or more connections are included within the scope of the claimed invention.

It will also be appreciated by those skilled in the art that although the connections listed in the present application are configured to be oppositely disposed in spaced relation to each other, i.e. adjacent connections extend towards the first and second sides of the blade body, respectively, other orientations are within the scope of the present application. As an example, the connection portions may not be arranged at a mutual distance, i.e. two connection portions that are partly adjacent extend towards the same side of the blade body. As another example, each connection portion extends towards the same side, such that the connection portion is substantially "L" shaped with the blade body, as seen from the side of the blade towards the blade body.

Fig. 8 is a perspective view of the forward locating sleeve 102, vane 103 and aft locating sleeve 104 shown in fig. 1A-1B in an assembled position to illustrate the mating relationship of the three. For convenience of explanation, an assembled state of the blade 103 between the front and

rear shrouds

102 and 104 is exemplarily illustrated by taking one blade 103 of the plurality of blades 103 in fig. 8 as an example, in which the blade 103 includes a first connection portion 501 and a second connection portion 502. As shown in fig. 8, the blade root 503 of the blade 103 is mounted in its corresponding blade retention opening 401. The blade forward limiting surface 302 of the forward locating sleeve 102 contacts the forward surface 512 of the blade root 503 of the blade 103 and the blade aft limiting surface 202 of the aft locating sleeve 104 contacts the aft surface 514 of the blade root 503 of the blade 103. The first and second connection portions 501,502 are located inside the forward and aft retaining

sleeves

102, 104, while the majority of the blade body 510 is located outside the forward and aft retaining

sleeves

102, 104. A side 522 (see fig. 5) of the first connection portion 501 facing the blade body 510 is configured to be able to abut an inner wall 304 (see fig. 3) of the forward locating sleeve 102. A side 523 (see fig. 5) of the second connection portion 502 facing the blade body 510 is configured to be able to abut the inner wall 204 (see fig. 2) of the rear locator sleeve 104. The first connection portion 501 of the blade 103 is connected to the front retainer sleeve 102 by welding, and the second connection portion 502 of the blade 103 is connected to the rear retainer sleeve 104 by welding. Subsequently, the front locating sleeve 102, the blade 103 and the rear locating sleeve 104, which are welded together, may be slipped over the hub body 106 and mounted to the hub body 106 by the rear fasteners 112, such that the blade 103 is mounted to the hub body 106. In this way, the blades 103 are accurately positioned on the hub body 106 by the forward and aft positioning

sleeves

102, 104.

It will be appreciated by those skilled in the art that instead of the arrangement shown in FIG. 8 for connecting the blade 103 with the forward locating sleeve 102 and the aft locating sleeve 104 before mounting to the hub body 106, the aft locating sleeve 104, the blade 103 and the forward locating sleeve 102 may be mounted to the hub body 106 in sequence.

It will also be understood by those skilled in the art that the connection of the first connection portion 501 to the front locator sleeve 102 and the connection of the second connection portion 502 to the rear locator sleeve 104 are not limited to the welds shown in the present embodiment, but include any possible connection. For example, holes are provided in the connecting portions and corresponding holes are provided in the front locator sleeve 102 and the second connecting portion 502, and the first connecting portion 501 and the front locator sleeve 102 and the second connecting portion 502 and the rear locator sleeve 104 are connected together by screws or bolts.

The mounting angle and circumferential arrangement of the blades 103 can be precisely positioned and mounted by the forward and aft retaining

sleeves

102, 104. Furthermore, the axial mounting position of the blades 103 on the hub body 106 can also be controlled by means of the front and/or

rear locating sleeves

102, 104.

FIG. 9A is a perspective view of another embodiment of a connection of rear locating sleeve 104 and hub body 106 of wind turbine 100 shown in FIG. 1A; FIG. 9B is a perspective view of the rear retaining sleeve 104 and hub body 106 shown in FIG. 9A in an assembled position to illustrate another manner of mating the rear retaining sleeve 104 and hub body 106. As shown in fig. 9A, the cylindrical portion 222 of the rear alignment sleeve 104 has an annular surface 901. The inner diameter of the cylindrical portion 222 is slightly larger than the outer diameter of the hub body 106 but smaller than the outer diameter of the protrusion 108 on the hub body 106, so that the rear positioning sleeve 104 can be fitted over the hub body 106 while the annular surface 901 can abut against the protrusion 108 of the hub body 106 without coming out from the rear end of the hub body 106.

The annular surface 901 has a plurality of mounting holes 904, and the plurality of mounting holes 904 extend toward the front end 201 of the rear positioning sleeve 104. The boss 108 of the hub body 106 is provided with a plurality of corresponding mounting holes 903. When the rear retaining sleeve 104 abuts the boss 108, the mounting holes 904 on the annular face 901 can be aligned with corresponding mounting holes 903 on the boss 108 so that fasteners 902 (e.g., screws, bolts, etc.) can be inserted into the mounting holes 904 and their corresponding mounting holes 903 to secure the rear retaining sleeve 104 to the hub body 106.

Fig. 10 is a perspective view and a partially enlarged view of a fourth embodiment of a blade 1003 of the wind turbine 100 shown in fig. 1A, for more clearly illustrating the structure of the connecting portion 1000 of the blade 1003. As shown in fig. 10, the blade 1003 includes a blade body 1010 and a connecting portion 1000. The connection 1000 extends from the root 1004 of the blade body 1010 towards a first side of the blade 1003 (i.e., the side on which the front surface 1012 of the blade body 1010 is located) to form a first connection plate 1001. The folding is then approximately 180 deg., and continues to extend a distance toward the second side of the blade 1003 (i.e., the side on which the back surface 1014 of the blade body 1010 is located) to form a second web 1002. The connecting portion 1000 is substantially T-shaped with the blade body 1010 as viewed from the side surface 1030 of the blade 1003 toward the blade body 1010.

The blade 1003 shown in fig. 10 may have two different structural configurations and mounting arrangements. As will be explained in detail below.

In a first structural configuration, the side 1022 of the first web 1001 facing the blade body 1010 is configured to engage the inner wall 304 of the front retaining sleeve 102 (see fig. 3), and the side 1024 of the second web 1002 facing the blade body 1010 is configured to engage the inner wall 204 of the rear retaining sleeve 104 (see fig. 2).

When the blade 1003 is installed in cooperation with the front and

rear bushings

102, 104, the blade root 1004 is first installed in its corresponding blade retention port 401. The blade forward limiting surface 302 of the forward locating sleeve 102 contacts the forward surface 1012 of the blade root 1004 of the blade 1003 and the blade aft limiting surface 202 of the aft locating sleeve 104 contacts the aft surface 1014 of the blade root 1004 of the blade 1003. The connection 1000 is located inside of the forward and

aft bushings

102, 104, while the majority of the blade body 1010 is located outside of the forward and

aft bushings

102, 104. The first web 1001 of the blade 1003 is connected to the front capture sleeve 102 by welding and the second web 1002 of the blade 1003 is connected to the rear capture sleeve 104 by welding. Subsequently, the front locating sleeve 102, the blade 1003 and the rear locating sleeve 104, which are welded together, may be sleeved onto the hub body 106. The front locating sleeve 102, the blades 1003 and the rear locating sleeve 104 are connected to the hub body 106 together by connecting the rear locating sleeve 104 to the hub body 106 using the rear fasteners 112.

In this way, the blade 1003 is accurately positioned on the hub body 106 by the front and

rear locator sleeves

102, 104.

In a second structural configuration, the side 1022 of the first connecting plate 1001 of the connecting portion 1000 facing the blade body 1010 is configured to be able to abut the inner wall 304 of the front locating sleeve 102, and the side 1026 of the second connecting plate 1002 facing away from the blade body 1010 is configured to be able to abut the hub body 106.

When the blade 1003 is fitted to the front shroud 102 and the rear shroud 104, the cylindrical portion 222 of the rear shroud 104 is first abutted against the protrusion 108 of the hub body 106. The rear locating sleeve 104 is secured to the hub body 106 by rear fasteners 112. The rear surface 1014 of the blade root 1004 of the blade 1003 is then brought into abutment with the blade rear limiting surface 202 of the rear locating sleeve 104. At this time, a side 1026 of the second connecting plate 1002 facing away from the blade body 1010 abuts the hub body 106. The second connecting plate 1002 is connected to the hub body 106 by welding. The forward engagement surface 303 of the forward alignment sleeve 102 is then engaged with the rearward engagement surface 203 of the rearward alignment sleeve 104. At this time, the blade root 1004 of the blade 1003 is installed in its corresponding blade retaining port 401. The first linkage plate 1001 abuts the inner wall 304 of the forward locating sleeve 102 towards the side 1022 of the blade body 1010. The connection of the front locating sleeve 102, the blade 1003 and the rear locating sleeve 104 together to the hub body 106 is completed by welding the first connection plate 1001 to the front locating sleeve 102.

The front locating sleeve 102 and the rear locating sleeve 104 are arranged to accurately locate the installation angle and the axial position of the blades, and the installation angle of each blade can be kept consistent before welding, so that the installation position of each blade is ensured to be the same as the designed installation position of each blade. Therefore, when the fan runs, the design performance of the fan is achieved, the running noise of the fan can be controlled, and the blade is prevented from being broken in the acceleration process.

Fig. 11 is a perspective view and a partial enlarged view of an embodiment five of the blade 1103 of the wind turbine 100 shown in fig. 1A, for more clearly illustrating the structure of the connection portion 1100 of the blade 1103. As shown in fig. 11, the blade 1103 includes a blade body 1110 and a connection portion 1100. The connection portion 1100 is a circular arc-shaped plate, and the connection portion 1100 is connected to the blade body 1110 by welding. The welding position thereof is set such that both ends of the connection part 1100 protrude from the blade body 1110. In other words, the blade body 1110 is not welded to the end of the connection portion 1100. The mating mounting of the blade 1103 to the forward locating sleeve 102 and the aft locating sleeve 104 is similar to that described in FIG. 10 and will not be described again here.

Fig. 12 is an exploded view and a partially enlarged view of another embodiment of a wind turbine 1200 of the present application to illustrate various components and their positional relationships in the wind turbine 1200. As shown in fig. 12, the fan 1200 includes a plurality of blades 1203. The structure of the blade 1203 is substantially similar to that of the blade 103 with two connecting portions shown in fig. 5, and the description thereof is omitted. Unlike the blade 103 shown in fig. 5, the first connection 1207 and the second connection 1208 of the blade 1203 have holes 1213 therein.

The fan 1200 also includes a hub 1205 and fasteners 1212. The outer circumferential surface of the hub body 1206 of the hub 1205 has a hole 1209 corresponding to the hole 1213. When the holes 1213 on the blade 1203 are aligned with the corresponding holes 1209 on the hub 1205, fasteners 1112 (e.g., screws, bolts, etc.) can be inserted into the holes 1213 and the holes 1209 to secure the blade 1203 to the hub 1205. In this embodiment, the front and

rear bushings

102, 104 are not required to define the mounting angle and circumferential arrangement of the blade, but rather the mounting position is defined by the position of the holes 1213 and their corresponding holes 1209, which not only simplifies the positioning process, but also reduces the number of required positioning components to achieve the desired precise positioning.

Although this embodiment is described with a structure similar to the blade 103 shown in FIG. 5, it will be understood by those skilled in the art that any of the structures described herein may be used with this mounting orientation to simplify the mounting process while accurately positioning the blade.

It will also be appreciated by those skilled in the art that although the fasteners 1212 are illustrated in this embodiment as securing the blade 1203 to the hub 1205, the attachment is not limited to the screws or bolts illustrated in this embodiment, but includes any possible attachment, such as welding or the like.

As an example, the hub in the present application may be an outer rotor of an outer rotor motor. The blades are connected to the outer rotor. When the outer rotor rotates, the blades also rotate.

As another example, the hub in the present application may be an inner rotor motor, and the hub body may be a housing connected to and carried by the inner rotor. The blade is connected to the housing. When the inner rotor rotates, the housing and vanes also rotate.

In addition, although the hub in the present application is exemplified by a cylindrical shape, the hub may be various shapes. The shape of the forward locating sleeve 102, the aft locating sleeve 104 and/or the parts of the blade that contact the hub may match the shape of the hub.

Although the present application will be described with reference to the particular embodiments shown in the drawings, it should be understood that numerous changes to the shielding device of the present application may be made without departing from the spirit and scope of the teachings of the present application. Those of ordinary skill in the art will also realize that there are different ways of varying the details of the structures in the embodiments disclosed in this application that fall within the spirit and scope of the application and the claims.

Claims

1. A fan, its characterized in that: the fan includes:

a hub (105,1205);

a plurality of blades (103,603,703,1003,1103,1203), the plurality of blades (103,603,703,1003,1103,1203) arranged around the hub (105,1205) and along a circumference of the hub (105,1205);

wherein the plurality of blades (103,603,703,1003,1103,1203) has at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208), the at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208) is connected with the blade root (503,605,707,1004) of the blade (103,603,703,1003,1103,1203), and each of the plurality of blades (103,603,703,1003,1103,1203) is "T" shaped or "L" shaped, and the at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208) is connected with the hub (105,1205).

2. The fan of claim 1, wherein: the hub (105,1205) is an outer rotor of an outer rotor motor.

3. The fan of claim 1, wherein: the fan still includes:

a front locating sleeve (102) and a rear locating sleeve (104), the front locating sleeve (102) and the rear locating sleeve (104) being sleeved on the hub (105);

the front positioning sleeve (102) is cylindrical, and the rear end (301) of the front positioning sleeve (102) comprises a plurality of blade front limiting surfaces (302) and a plurality of front joint surfaces (303); and

the rear positioning sleeve (104) is cylindrical, the front end (201) of the rear positioning sleeve (104) comprises a plurality of blade rear limiting surfaces (202) and a plurality of rear joint surfaces (203), the front positioning sleeve (102) and the rear positioning sleeve (104) are jointed through the plurality of front joint surfaces (303) and the plurality of rear joint surfaces (203), and a plurality of blade limiting openings (401) are formed between the plurality of blade front limiting surfaces (302) and the plurality of blade rear limiting surfaces (202);

wherein each of the plurality of blades (103) is respectively installed in a corresponding one of the plurality of blade limit openings (401).

4. The fan of claim 3, wherein:

the shape of the plurality of blade limiting openings (401) is matched with the shape of the peripheral outline of the blade root (503,605,707,1004) of the plurality of blades (103).

5. The fan of claim 3, wherein:

the fan further comprises an end positioning sleeve (101), the end positioning sleeve (101) comprises a cylinder part (109) and an end cover (110) for closing one end of the cylinder part (109), the cylinder part (109) is sleeved on the hub (105) and is connected with the front end (305) of the front positioning sleeve (102), and a hole (111) is formed in the end cover (110);

the front end of the hub (105) has a protrusion (107), and the protrusion (107) is connected with the end positioning sleeve (101) through a hole (111) on the end cover (110).

6. The fan of claim 3, wherein:

the outer surface of the hub (105) is provided with a projection (108) extending along the circumferential direction, and the rear end (122) of the rear positioning sleeve (104) abuts against the projection (108).

7. The fan according to claim 3 or 6, wherein:

the rear locating sleeve (104) is connected to the hub (105).

8. The fan of claim 7, wherein:

the rear end (122) of the rear positioning sleeve (104) has a cylindrical portion (222), the rear end (122) of the rear positioning sleeve (104) abuts against the projection (108), and the cylindrical portion (222) is connected with the projection (108).

9. The fan of claim 3, wherein:

the plurality of blade front limiting surfaces (302) and the plurality of front joint surfaces (303) of the front positioning sleeve (102) are arranged at intervals and extend obliquely relative to the axial direction of the front positioning sleeve (102) in the direction from the front end (305) to the rear end (301) of the front positioning sleeve (102);

the plurality of blade rear limiting surfaces (202) and the plurality of rear engaging surfaces (203) of the rear positioning sleeve (104) are arranged at intervals and extend obliquely relative to the axial direction of the rear positioning sleeve (104) in the direction from the front end (201) to the rear end (122) of the rear positioning sleeve (104).

10. The fan of claim 1, wherein:

the at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208) is two or more connections (501,502,601,602,604,701,702,704,705,706,1207,1208) aligned along the length of the blade root (503,605,707), wherein at least one connection (501,601,702,705,1207) of the two or more connections extends towards one side of the blade (103,603,703,1203) and the other connection (502,602,604,701,704,706,1208) of the two or more connections extends towards the other side of the blade (103,603,703,1203).

11. The fan of claim 10, wherein:

the at least one connecting portion (501,601,702,705,1207) extending toward one side of the vane (103,603,703,1203) and the other connecting portion (502,602,604,701,704,706,1208) extending toward the other side of the vane (103,603,703,1203) are provided at intervals.

12. The fan according to claim 1 or 3, wherein:

the at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208) is one connection (1000), the one connection (1000) comprises a first connection plate (1001) extending towards one side of the blade (1003), and a second connection plate (1002) folded from the first connection plate (1001) and extending towards the other side of the blade (1003), and the second connection plate (1002) is connected with the hub (105).

13. The fan of claim 1, wherein:

the at least one connection (501,502,601,602,604,701,702,704,705,706, 1000,1100,1207,1208) is connected to the hub (105,1205) by means of screws, bolts or welding.