CN111810442B - Fan - Google Patents

Abstract

The present application provides a fan, which includes: a hub and a plurality of blades. The plurality of blades are arranged around the hub and along the circumference of the hub, and the plurality of blades have at least one connection portion connected to the root of the blade, and each of the plurality of blades is in a "T" shape or an "L" shape, and at least one connection portion is connected to the hub. The fan also includes a front positioning sleeve and a rear positioning sleeve sleeve mounted on the hub. The front positioning sleeve is cylindrical, and its rear end includes a plurality of blade front limiting surfaces and a plurality of front joint surfaces; the rear positioning sleeve is cylindrical, and its front end includes a plurality of blade rear limiting surfaces and a plurality of rear joint surfaces. The front positioning sleeve and the rear positioning sleeve are joined through a plurality of front joint surfaces and a 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; each of the plurality of blades is respectively installed in a corresponding one of the plurality of blade limiting openings.

Description

Blower fan

Technical Field

The application relates to the field of rotating machinery such as fans and the like, in particular to a mounting structure of fan blades.

Background

In a 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 a blade, the root of the blade is welded directly to the outside of the hub by an operator or machine. This mounting structure and mounting method have difficulty in ensuring the accuracy of the mounting of all the blades with respect to the hub, and are not easy to mount.

Disclosure of Invention

The application provides a fan with blades with connecting parts, which is used for accurately positioning the installation angle, circumferential arrangement and axial position of the blades.

According to the above, the application provides a fan comprising a hub, a plurality of blades surrounding the hub and arranged along the circumference of the hub, wherein the plurality of blades are provided with at least one connecting part, the at least one connecting part is connected with the blade root of the blade, each blade 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.

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

According to the technical scheme, the fan further comprises a front positioning sleeve and a rear positioning sleeve, wherein the front positioning sleeve and the rear positioning sleeve are sleeved on the hub, the front positioning sleeve is cylindrical, 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 is cylindrical, the front end of the rear positioning sleeve comprises a plurality of rear blade limiting surfaces and a plurality of rear joint surfaces, the front positioning sleeve and the rear positioning sleeve are jointed through the front joint surfaces and the rear joint surfaces, a plurality of blade limiting openings are formed between the front blade limiting surfaces and the rear blade limiting surfaces, and each blade is installed in a corresponding limiting opening of the blade limiting openings.

According to the above, the shapes of the blade limit openings are matched with the shapes of the peripheral outlines of the blade roots of the blades.

According to the above, the fan further comprises an end positioning sleeve, the end positioning sleeve comprises a barrel and an end cover for closing one end of the barrel, the barrel is sleeved on the hub and connected with the front end of the front positioning sleeve, a hole is formed in the end cover, a protruding portion is arranged at the front end of the hub, and the protruding portion is connected with the end positioning sleeve through the hole in the end cover.

According to the above, the outer surface of the hub is provided with a protruding part extending along the circumferential direction, and the rear end of the rear positioning sleeve is abutted against the protruding part.

According to the above, the rear positioning sleeve is connected with the hub.

According to the above, the rear end of the rear positioning sleeve has a cylindrical portion, the rear end of the rear positioning sleeve abuts against the protruding portion, and the cylindrical portion is connected to the protruding portion.

According to the above, the plurality of vane front limit surfaces and the plurality of front joint surfaces of the front positioning sleeve are arranged at intervals and extend obliquely with respect 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, and the plurality of vane rear limit surfaces and the plurality of rear joint surfaces of the rear positioning sleeve are arranged at intervals and extend obliquely with respect 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 in a longitudinal 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 portions of the two or more connecting portions extend toward the other side of the blade.

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

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

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

Drawings

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

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

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

FIG. 3 is a perspective view of the front positioning sleeve 102 of the blower 100 shown in FIG. 1A;

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

FIG. 5 is a perspective view of an embodiment one 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 the front positioning sleeve 102, blade 103, and rear positioning sleeve 104 shown in FIGS. 1A-1B in an assembled position;

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

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

FIG. 10 is a perspective view and a partial enlarged view of a fourth embodiment of a blade 1003 of the blower 100 shown in FIG. 1A;

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

fig. 12 is an exploded view and a partial enlarged view of another embodiment of a blower 1200 of the present application.

Detailed Description

Various embodiments of the present application are described below with reference to the accompanying drawings, which form a part hereof. It is to be understood that, although directional terms, such as "front", "rear", "upper", "lower", "left", "right", etc., may be used in the present application to describe various example structural parts and elements of the present application, these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Since the disclosed embodiments of the application may be arranged in a variety of orientations, these directional terms are used by way of illustration only and are in no way limiting.

Fig. 1A is a perspective view of an embodiment of a blower 100 of the present application, and fig. 1B is an exploded view of the perspective view of the blower 100 shown in fig. 1A, for illustrating the respective constituent components of the blower 100 and their positional relationship. As shown in fig. 1A and 1B, the fan 100 includes an end fastener 113, an end positioning sleeve 101, a front positioning sleeve 102, a plurality of blades 103, a rear positioning sleeve 104, a hub 105, and a rear fastener 112. A plurality of blades 103 can be mounted on the hub 105 by end fasteners 113, end positioning sleeve 101, front positioning sleeve 102, rear positioning sleeve 104, and rear fasteners 112.

Specifically, as shown in FIG. 1B, the hub 105 includes a hub body 106 and a protrusion 107. The hub body 106 is generally cylindrical and has a central axis X. The protruding portion 107 is provided at the front end of the hub body 106 coaxially with the hub body 106. When the hub body 106 rotates, the protruding portion 107 can rotate therewith. The free end 120 of the projection 107 is provided with an external thread formation. The rear end of the hub body 106 is provided with a projection 108, the projection 108 encircling the circumferential direction of the hub body 106 and extending outwardly in the radial direction of the hub body 106. The rear positioning sleeve 104 can be sleeved over the hub body 106, and the rear end 122 of the rear positioning sleeve 104 can abut the projection 108. The outer diameter of the projection 108 is configured to be greater than the inner diameter of the rear positioning sleeve 104 so that the rear positioning sleeve 104 can rest against the projection 108 without backing out from the rear end of the hub body 106.

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

Those skilled in the art will also appreciate that in some embodiments, the projection 108 may not be provided, with the cooperation of the aperture 114, the aperture 115, and the rear fastener 112 defining the mounting location of the rear positioning sleeve 104 in the axial direction of the hub body 106. It will also be appreciated that the rear positioning sleeve 104 may be secured to the hub body 106 not by the rear fasteners 112, but by welding or the like.

As shown in fig. 3, the front positioning sleeve 102 is substantially 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 front positioning sleeve 102 may cooperate with the front end of the rear positioning sleeve 104 to grip the blade 103. The blades 103 are clamped by the front positioning sleeve 102 and the rear positioning sleeve 104 and then positioned on the hub body 106. The front end of the front positioning sleeve 102 is provided with an external thread which can cooperate with the internal thread formation of the rear end of the end positioning sleeve 101.

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

Those skilled in the art will appreciate that in some embodiments, the front positioning sleeve 102 may be connected to the hub body 106 in a similar manner as the rear positioning sleeve 104 is connected to the hub body 106 (e.g., by the rear fasteners 112). For example, the front positioning sleeve 102 and the hub body 106 are provided with holes, and the front positioning sleeve 102 is connected to the hub body 106 by fasteners without using the end positioning sleeve 101 and the end fasteners 113. In this example, the boss 105 may not be provided with the protrusion 107.

Those skilled in the art will appreciate that in other embodiments, the front positioning sleeve 102 and the rear positioning sleeve 104 may also secure the blade 103 to the hub body 106 in other ways. For example, an external thread is provided on the front end surface of the hub body 106, an internal thread is provided on the inner surface of the front positioning sleeve 102, the front positioning sleeve 102 is screwed with the hub body 106, the front positioning sleeve 102 can be moved in the axial direction of the hub body 106 by rotating the front positioning sleeve 102 to be mutually engaged with the rear positioning sleeve 104 without using the end positioning sleeve 101, and for example, a sleeve 109 having an annular shape and an internal thread is provided on the front end of the hub body 106, the sleeve 109 is screwed with the hub body 106, and the sleeve 109 can be moved in the axial direction of the hub body 106 by rotating the sleeve 109 to be moved to be mutually engaged with the rear positioning sleeve 104.

Fig. 2 is a perspective view of the rear positioning sleeve 104 of the blower 100 shown in fig. 1A, for more clearly showing the specific structure of the rear positioning sleeve 104. As shown in fig. 2, the rear positioning sleeve 104 includes a cylindrical portion 222 and a plurality of serrations 212 at the rear end 122 of the rear positioning sleeve 104. The plurality of serrations 212 extend from the front end of the cylindrical portion 222 toward the front end 201 of the rear positioning sleeve 104. Each of the plurality of serrations 212 is provided with a blade aft limit face 202 and an aft engagement face 203. The number of blade rear limit surfaces 202 is the same as the number of 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 limit surfaces 202 are all 5. Each serration 212 has one tooth tip and two tooth bottoms (left and right tooth bottoms), wherein the face formed by the connection of the tooth tip and the left tooth bottom is the blade rear limit face 202, and the face formed by the connection of the tooth tip and the right tooth bottom is the rear joint face 203, so that the blade rear limit face 202 and the rear joint face 203 are disposed at intervals, and those skilled in the art can easily think that the number of the blade rear limit faces 202 is set to be greater than the number of the blades 103 but only a part of the blade rear limit faces 202 is used and the other blade rear limit faces 202 are left idle.

Each blade rear limit surface 202 is shaped to match the shape of the rear surface 514 of the blade root 503 of the blade 103 (as shown in fig. 5) such that each blade rear limit surface 202 is able to conform to the rear surface 514 of the blade root 503 of the blade 103 when the rear positioning sleeve 104 and blade 103 are assembled in place. Each blade rear limit surface 202 and each rear engagement surface 203 extend obliquely relative to the axial direction of the rear positioning sleeve 104 in a direction from the front end 201 to the rear end 122 of the rear positioning sleeve 104. In other words, each blade rear limit surface 202 is disposed obliquely with respect to the central axis X. In the illustrated embodiment of the application, each rear engagement surface 203 is also disposed obliquely with respect to the central axis X.

Fig. 3 is a perspective view of the front positioning sleeve 102 of the blower 100 shown in fig. 1A, for more clearly showing the specific structure of the front positioning sleeve 102. As shown in fig. 3, the front positioning sleeve 102 includes a cylindrical portion 322 at the front end 305 of the front positioning sleeve 102 and a plurality of serrations 312. The 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 vane forward limit surface 302 and a forward engagement surface 303. The number of blade front limiting surfaces 302 is the same as the number of blades 103. In the embodiment shown in fig. 1A, the number of blades 103 is 5, and thus the number of serrations 312, the number of blade forward limit surfaces 302, and the number of forward engagement surfaces 303 are all 5. Each serration 312 has one tooth tip and two tooth bottoms (left and right tooth bottoms), wherein the face formed by the connection of the tooth tip and the right tooth bottom is the blade front limit face 302, and the face formed by the connection of the tooth tip and the left tooth bottom is the front joint face 303, so that the blade front limit face 302 and the front joint face 303 are arranged at a spacing, and those skilled in the art can easily think that the number of the blade front limit faces 302 is greater than the number of the blades 103 but only a part of the blade front limit faces 302 are used and the other blade front limit faces 302 are left idle.

Each blade forward limit surface 302 is shaped to match the shape of the front surface 512 (shown in fig. 5) of the blade root 503 of the blade 103 such that each blade forward limit surface 302 is capable of conforming to the front surface 512 of the blade root 503 of the blade 103 when the forward locating sleeve 102 and blade 103 are assembled in place. Each vane forward limit surface 302 and each forward engagement surface 303 extend obliquely relative to the axial direction of the forward positioning sleeve 102 in a direction from the forward end 305 to the aft end 301 of the forward positioning sleeve 102. In other words, each blade front limit surface 302 is disposed obliquely with respect to the central axis X. In the illustrated embodiment of the application, each front engagement surface 303 is also disposed obliquely with respect to the central axis X.

Fig. 4 is a perspective view of the rear positioning sleeve 104 of fig. 2 in an assembled position with the front positioning sleeve 102 of fig. 3 to illustrate the mating relationship of the rear positioning sleeve 104 with the front positioning sleeve 102. As shown in fig. 4, when the front and rear positioning sleeves 102, 104 are assembled in place, each front engagement surface 303 abuts a respective one of the rear engagement surfaces 203, and each blade front stop surface 302 cooperates with a respective one of the blade rear stop surfaces 202 to form a blade stop aperture 401 therebetween. Since each blade forward limit surface 302 is shaped to match the shape of the front surface 512 (shown in fig. 5) of the blade root 503 of the blade 103 and each blade aft limit 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, the plurality of blade forward limit surfaces 302 and the plurality of blade aft limit surfaces 202 define a plurality of blade limit ports 401 that are capable of matching 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 rear positioning sleeve 104 and the front positioning sleeve 102 are adapted to define a plurality of blade limiting openings 401 for clamping the blade root 503 of the blade 103 such that the blade 103 can be positioned on the hub body 106 by the rear positioning sleeve 104 and the front positioning sleeve 102. Accordingly, the plurality of rear engagement surfaces 203 on the rear positioning sleeve 104 and the plurality of front engagement surfaces 303 on the front positioning sleeve 102 may be provided in any shape so as to maintain sufficient support strength between the rear positioning sleeve 104 and the front positioning sleeve 102 to clamp the blade 103.

Fig. 5 is a perspective view of an embodiment one of the blade 103 of the blower 100 shown in fig. 1A, for more clearly showing the specific structure of the blade 103. As shown in fig. 5, the blade 103 includes 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 the blade root 503 of the blade body 510 and are aligned along the length direction of the blade root 503. The first connection 501 extends from the blade root 503 towards a first side of the blade body 510 (i.e. the side of the front surface 512 of the blade body 510) and the second connection 502 extends from the blade root 503 of the blade body 510 towards a second side of the blade body 510 (i.e. the side of the rear surface 514 of the blade body 510). The first connection portion 501 and the second connection portion 502 have a substantially arc-shaped shape in the longitudinal direction of the blade root 503. The first and second connection portions 501 and 502 are generally "T" shaped with the blade body 510 as viewed from the side 530 of the blade 103 toward the blade body 510.

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

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 showing the specific structure of the blade 603. The blade 603 shown in fig. 6 is different from the blade 103 shown in fig. 5 in that the blade 603 has three connection parts, namely, a first connection part 601, a second connection part 602 and a third connection part 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 blade root 605 of the blade 603 towards a first side of the blade 603 (i.e. the side of the front surface 612 of the blade body 610). The second connection 602 and the third connection 604 extend from the blade root 605 of the blade 603 towards the second side of the blade 603 (i.e. the side of the blade body 610 where the rear surface 614 is located). The first, second and third connection portions 601, 602 and 604 have a substantially arcuate shape in the longitudinal direction of the blade root 605. The first, second and third connection portions 601, 602, 604 are substantially "T" shaped with the blade body 610 as seen from the side 630 of the blade 603 towards the blade body 610.

The first, second and third connection portions 601, 602 and 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, second and third connection portions 601, 602 and 604, or connecting the first, second and third connection portions 601, 602 and 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 showing the 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 connection parts, 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 part 701, the second connection part 702, the third connection part 704, the fourth connection part 705, and the fifth connection part 706 are disposed at intervals. The second connection 702 and the fourth connection 705 extend from the blade root 707 of the blade 703 towards a first side of the blade 703, i.e. the side of the blade body 710 where the front surface 712 is located. The first connection 701, the third connection 704 and the fifth connection 706 extend from the blade root 707 of the blade 703 towards the second side of the blade 703 (i.e. the side of the blade body 710 where the rear surface 714 is located). The first, second, third, fourth and fifth connection portions 701, 702, 704, 705 and 706 have a substantially arc-shaped longitudinal shape in the blade root 703. The first, second, third, fourth, and fifth connection portions 701, 702, 704, 705, 706 are generally "T" shaped from the blade body 710 as viewed from the side 730 of the blade 703.

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

It will be appreciated by those skilled in the art that the number of connections on the blade body is not limited to the two, three or five listed herein, and that one or more connections are included within the scope of the claimed application.

It will also be appreciated by those skilled in the art that although the connectors listed in this disclosure are configured to be disposed in spaced-apart, opposite orientations, i.e., adjacent connectors extend toward the first and second sides of the blade body, respectively, other orientations are within the scope of the claimed application. As an example, the connection portions may not be arranged in a mutually spaced manner, i.e. two connection portions which are partially adjacent extend towards the same side of the blade body. As another example, each of the connection portions extends toward the same side such that the connection portion is generally "L" shaped with the blade body as viewed from the side of the blade toward the blade body.

Fig. 8 is a perspective view of the front positioning sleeve 102, the blades 103 and the rear positioning sleeve 104 shown in fig. 1A-1B in an assembled position to illustrate the mating relationship of the three. For convenience of explanation, taking one blade 103 among the plurality of blades 103 in fig. 8as an example, an assembled state of the blade 103 between the front positioning sleeve 102 and the rear positioning sleeve 104 is exemplarily described, wherein 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 retaining slot 401. The blade forward limit surface 302 of the forward positioning sleeve 102 contacts the forward surface 512 of the blade root 503 of the blade 103 and the blade aft limit surface 202 of the aft positioning sleeve 104 contacts the aft surface 514 of the blade root 503 of the blade 103. The first and second connection portions 501 and 502 are located inside the front and rear positioning sleeves 102 and 104, while the majority of the blade body 510 is located outside the front and rear positioning sleeves 102 and 104. The side 522 (see fig. 5) of the first connection portion 501 facing the blade body 510 is configured to be able to engage the inner wall 304 (see fig. 3) of the front positioning sleeve 102. The side 523 of the second connection 502 facing the blade body 510 (see fig. 5) is configured to engage the inner wall 204 of the rear positioning sleeve 104 (see fig. 2). The first connection 501 of the blade 103 is connected to the front positioning sleeve 102 by welding and the second connection 502 of the blade 103 is connected to the rear positioning sleeve 104 by welding. The front and rear positioning sleeves 102, 103, 104, which are welded together, may then be sleeved over the hub body 106 and mounted to the hub body 106 by the rear fasteners 112, such that the blades 103 are mounted to the hub body 106. In this way, the blades 103 are precisely positioned on the hub body 106 by the front and rear positioning sleeves 102, 104.

It will be appreciated by those skilled in the art that the rear positioning sleeve 104, the blades 103 and the front positioning sleeve 102 may be mounted on the hub body 106 in sequence, in addition to the mounting of the blades 103 to the front positioning sleeve 102 and the rear positioning sleeve 104 to the hub body 106 shown in fig. 8.

Those skilled in the art will also appreciate that the manner of connection of the first connection 501 to the front positioning sleeve 102 and the manner of connection of the second connection 502 to the rear positioning sleeve 104 are not limited to the welding illustrated in the present embodiment, but include any possible manner of connection. For example, holes are provided in the connection portions and corresponding holes are provided in the front positioning sleeve 102 and the second connection portion 502, and the first connection portion 501 and the front positioning sleeve 102 and the second connection portion 502 and the rear positioning sleeve 104 are connected together by screws or bolts.

By the front positioning sleeve 102 and the rear positioning sleeve 104, the mounting angle and circumferential arrangement of the blades 103 can be precisely positioned and mounted. Furthermore, the axial mounting position of the blades 103 on the hub body 106 may also be controlled by the front positioning sleeve 102 and/or the rear positioning sleeve 104.

Fig. 9A is a perspective view of another embodiment of the connection of the rear positioning sleeve 104 and the hub body 106 of the fan 100 shown in fig. 1A, and fig. 9B is a perspective view of the rear positioning sleeve 104 and the hub body 106 shown in fig. 9A in an assembled position to illustrate another mating of the rear positioning sleeve 104 and the hub body 106. As shown in fig. 9A, the cylindrical portion 222 of the rear positioning 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 boss 108 on the hub body 106 so that the rear positioning sleeve 104 can be sleeved on the hub body 106 while the annular surface 901 can abut on the boss 108 of the hub body 106 without coming out of 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 protruding portion 108 of the hub body 106 is provided with a plurality of corresponding mounting holes 903. When the rear positioning sleeve 104 is abutted against the boss 108, the mounting holes 904 on the annular face 901 can be aligned with corresponding mounting holes 903 on the boss 108 such 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 positioning sleeve 104 to the hub body 106.

Fig. 10 is a perspective view and a partial enlarged view of a fourth embodiment of a blade 1003 of the blower 100 shown in fig. 1A, for more clearly showing the structure of a connection portion 1000 of the blade 1003. As shown in fig. 10, the blade 1003 includes a blade body 1010 and a connection portion 1000. The connection 1000 extends from the blade root 1004 of the blade body 1010 towards a first side of the blade 1003 (i.e. the side of the front surface 1012 of the blade body 1010) for a length forming a first connection plate 1001. And then turned over approximately 180 deg., continuing to extend a distance toward the second side of the blade 1003 (i.e., the side of the blade body 1010 where the rear surface 1014 is located) to form a second web 1002. The connection 1000 is generally "T" shaped with the blade body 1010, as viewed from the side 1030 of the blade 1003 toward the blade body 1010.

The vane 1003 shown in fig. 10 may have two different structural configurations and installations. As will be described in detail below.

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

When the blade 1003 is mounted in cooperation with the front and rear positioning sleeves 102, 104, the blade root 1004 is first mounted in its respective blade limiting port 401. The blade forward limit surface 302 of the forward positioning sleeve 102 contacts the forward surface 1012 of the blade root 1004 of the blade 1003 and the blade aft limit surface 202 of the aft positioning sleeve 104 contacts the aft surface 1014 of the blade root 1004 of the blade 1003. The connection 1000 is located inboard of the front and rear positioning sleeves 102, 104, while a majority of the blade body 1010 is located outboard of the front and rear positioning sleeves 102, 104. The first connection plate 1001 of the blade 1003 is connected to the front positioning sleeve 102 by welding, and the second connection plate 1002 of the blade 1003 is connected to the rear positioning sleeve 104 by welding. The front positioning sleeve 102, blades 1003 and rear positioning sleeve 104, which are welded together, may then be sleeved onto the hub body 106. The front positioning sleeve 102, blades 1003 are connected to the hub body 106 together with the rear positioning sleeve 104 by connecting the rear positioning sleeve 104 to the hub body 106 using rear fasteners 112.

In this way, the blade 1003 is accurately positioned on the hub body 106 by the front positioning sleeve 102 and the rear positioning sleeve 104.

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

When the vane 1003 is fitted with the front positioning sleeve 102 and the rear positioning sleeve 104, the cylindrical portion 222 of the rear positioning sleeve 104 is first abutted against the projecting portion 108 of the hub body 106. The rear positioning 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 limit face 202 of the rear positioning sleeve 104. At this time, the side 1026 of the second connecting plate 1002 facing away from the blade body 1010 is attached to the hub body 106. The second connection plate 1002 is connected to the hub body 106 by welding. Subsequently, the front engagement surface 303 of the front positioning sleeve 102 is again engaged with the rear engagement surface 203 of the rear positioning sleeve 104. At this time, the blade roots 1004 of the blades 1003 are installed in their respective blade limiting ports 401. The side 1022 of the first connection plate 1001 facing the blade body 1010 engages the inner wall 304 of the front positioning sleeve 102. The front positioning sleeve 102, the blades 1003 and the rear positioning sleeve 104 are connected to the hub body 106 together by welding the first connection plate 1001 to the front positioning sleeve 102.

The arrangement of the front positioning sleeve 102 and the rear positioning sleeve 104 can accurately position the mounting angle and the axial position of the blade, and the mounting angle of each blade can be kept consistent before welding, so that the mounting position of the blade is ensured to be the same as the design mounting position of the blade. In this way, when the fan is running, the design performance of the fan is achieved, meanwhile, the fan running noise can be controlled, and the blades are prevented from being broken in the acceleration process.

Fig. 11 is a perspective view and a partial enlarged view of a fifth embodiment of the blade 1103 of the blower 100 shown in fig. 1A, for more clearly showing 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 connecting portion 1100. The connection portion 1100 is a circular arc plate, and the connection portion 1100 is connected to the blade body 1110 by welding. The welding positions thereof are set such that both ends of the connection portion 1100 protrude from the blade body 1110. In other words, the blade body 1110 is not welded to the end of the connection part 1100. The mating installation of the vanes 1103 with the front and rear positioning sleeves 102, 104 is similar to that described in fig. 10 and will not be repeated here.

Fig. 12 is an exploded view and a partially enlarged view of another embodiment of a blower 1200 of the present application to show the respective constituent components in the blower 1200 and their positional relationship. As shown in fig. 12, the fan 1200 includes a plurality of blades 1203. The structure of the vane 1203 is substantially similar to the structure of the vane 103 having two connection portions shown in fig. 5, and will not be described again. Unlike the vane 103 shown in fig. 5, the first connecting portion 1207 and the second connecting portion 1208 of the vane 1203 have holes 1213 thereon.

Blower 1200 also includes a hub 1205 and fasteners 1212. The outer circumferential surface of the hub body 1206 of the hub 1205 has holes 1209 corresponding to the holes 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 holes 1209 to secure the blade 1203 to the hub 1205. In this embodiment, the front and rear positioning sleeves 102, 104 are not required to define the blade mounting angle and circumferential arrangement, but rather the mounting locations are defined by the locations of the holes 1213 and their corresponding holes 1209, which not only simplifies the positioning process, but also reduces the required positioning components to achieve the desired precise positioning effect.

Although this embodiment describes an embodiment with a similar configuration to the blade 103 shown in fig. 5, one skilled in the art will appreciate that any of the configurations described herein may be used with such mounting locations to simplify the mounting process while precisely positioning the blade.

It will also be appreciated by those skilled in the art that although the present embodiment uses fasteners 1212 as an example to secure the blade 1203 to the hub 1205, the connection is not limited to the screw or bolt connection shown in the present embodiment, but includes any possible connection, such as welding, etc.

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, and when the outer rotor rotates, the blades also rotate.

As another example, the hub of the present application may be an inner rotor motor, and the hub body may be a housing connected to and driven by the inner rotor. The vanes are connected to the housing, and as the inner rotor rotates, the housing and vanes also rotate.

In addition, although the hub of the present application is exemplified as a cylindrical shape, the hub may be variously shaped. The shape of the front positioning sleeve 102, the rear positioning sleeve 104 and/or the parts of the blade that contact the hub may match the shape of the hub.

Although the application will be described with reference to the specific embodiments shown in the drawings, it should be understood that many variations of the blower of the present application are possible without departing from the spirit and scope and the background of the teachings of the application. Those of ordinary skill in the art will also recognize that there are different ways to alter the details of the structure of the disclosed embodiments of the present application that fall within the spirit and scope of the present application and the claims.

Claims (9)

1. A fan is characterized in that the fan comprises:

A hub (105,1205);

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

wherein the plurality of blades (103,603,703,1103,1203) have at least one connection (501,

502,601,602,604,701,702,704,705,706,1207,1208), Said at least one connection portion (501,

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

502,601,602,604,701,702,704,705,706,1207,1208) Are two or more connections (501,502,601,602,604,701,702,704,705,706,1207,1208) arranged in the longitudinal direction 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), the other connections (502,602,604,701,704,706,1208) of the two or more connections extend towards the other side of the blade (103,603,703,1203),

The fan also includes:

A front positioning sleeve (102) and a rear positioning sleeve (104), wherein the front positioning sleeve (102) and the rear positioning sleeve (104) are sleeved on the hub (105);

the front positioning sleeve (102) is cylindrical, the rear end (301) of the front positioning sleeve (102) comprises a plurality of vane 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), wherein 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 vanes (103) is respectively mounted in a corresponding one of the plurality of vane limiting openings (401), and

The plurality of vane front limit 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 limit surfaces (202) and the plurality of rear joint 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).

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

3. The blower of claim 1, wherein:

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

4. The blower of claim 1, wherein:

The fan further comprises an end positioning sleeve (101), the end positioning sleeve (101) comprises a barrel part (109) and an end cover (110) for closing one end of the barrel part (109), the barrel 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) is provided with a protruding part (107), and the protruding part (107) is connected with the end positioning sleeve (101) through a hole (111) on the end cover (110).

5. The blower of claim 1, wherein:

a bulge (108) extending along the circumferential direction is arranged on the outer surface of the hub (105), and the rear end (122) of the rear positioning sleeve (104) is abutted against the bulge (108).

6. The fan as claimed in claim 5, wherein:

The rear positioning sleeve (104) is connected with the hub (105).

7. The blower of claim 6, 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) bearing against the projection (108), the cylindrical portion (222) being connected with the projection (108).

8. The blower of claim 1, wherein:

The at least one connection (501,601,702,705,1207) extending towards one side of the blade (103,603,703,1203) is spaced apart from the other connection (502,602,604,701,704,706,1208) extending towards the other side of the blade (103,603,703,1203).

9. The blower of claim 1, wherein:

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