WO2018076970A1

WO2018076970A1 - Impeller and draught fan

Info

Publication number: WO2018076970A1
Application number: PCT/CN2017/102554
Authority: WO
Inventors: 刘伯春; 张�浩; 汪俊勇; 颜圣绿
Original assignee: 珠海格力电器股份有限公司
Priority date: 2016-10-26
Filing date: 2017-09-21
Publication date: 2018-05-03
Also published as: CN106402022B; CN106402022A

Abstract

Disclosed are an impeller and a draught fan. The impeller comprises a hub (1) and fan blades (2), wherein the fan blades (2) are connected to the hub (1), and the fan blades (2) and the hub (1) are detachably connected. By means of the above-mentioned arrangement, different types of fan blades (2) can be installed to meet different requirements for air volume. When the fan blades (2) are damaged, the fan blades (2) can be conveniently replaced, and there is no need to scrap the whole impeller; and the fan blades (2) and the hub (1) can be stored separately, and thus, storage space can be saved.

Description

Impeller and fan

Technical field

The invention relates to the technical field of wind turbines, in particular to an impeller and a fan provided with the same.

Background technique

The existing axial flow impeller is generally one-piece, that is, the impeller and the hub are integrally molded by a mold, and the blades are not detachable. Since it is one-piece casting, it is necessary to make a large injection mold, and the production cost is high. Since the blades are not detachable, when an impeller of another air volume is required, the entire impeller needs to be redesigned, and the requirement cannot be achieved by merely replacing the impeller blades. Such impellers have large radial diameters, and if stacked together, the blades are easily deformed or broken under heavy pressure due to their small thickness, so the impellers are generally worn on special trolleys during storage. Or the board, so it is also unfavorable for storage, wasting more storage space.

Summary of the invention

In view of the above, it is an object of the present invention to provide an impeller that facilitates disassembly and storage and a fan provided with such an impeller.

According to a first aspect of the invention, there is provided an impeller comprising a hub and a vane, the vane being coupled to the hub, the vane being detachably connected between the vane and the hub.

Preferably, the hub is a split structure comprising a plurality of hub segments, the vanes being disposed between adjacent two hub segments.

Preferably, the plurality of hub segments include a first hub segment and a second hub segment, the first hub segment and the second hub segment being sequentially connected in the axial direction.

Preferably, the first hub segment includes a first end and a second end, the second hub segment including a first end and a second end; a second end of the first hub segment and a second hub segment a detachable connection between the ends, the vane being clamped between the second end of the first hub segment and the first end of the second hub segment; at the first hub segment and the second hub segment There is a connection structure between them.

Preferably, the first hub segment includes a first hub ring and a first reinforcement located radially inward of the first hub ring; the second hub segment includes a second hub ring and is located at the second hub ring a second reinforcing portion on the radially inner side; the connecting structure is disposed on the first reinforcing portion and the second reinforcing portion.

Preferably, the hub further includes a hub positioning structure disposed between the first hub segment and the second hub segment.

Preferably, the hub positioning structure includes a positioning post disposed at an axial end of the second end of the first hub segment, and a positioning groove disposed at an axial end of the first end of the second hub segment; or The hub positioning structure includes a locating slot disposed at an axial end of the second end of the first hub segment and a locating post disposed at an axial end of the first end of the second hub segment.

Preferably, the vane includes a vane body and a fixing portion located radially inward of the vane body.

Preferably, the fixing portion includes a protrusion extending to the outside of a radially inner end surface of the blade body.

Preferably, a blade positioning structure is disposed on the blade body adjacent to the fixing portion, and an axial end portion of the first hub segment or the second hub segment is disposed corresponding to the blade positioning structure Hub blade positioning structure.

Preferably, the blade positioning structure is a positioning protrusion, a positioning groove or a positioning hole;

The hub blade positioning structure is a positioning groove, a positioning hole or a positioning protrusion corresponding to the blade positioning structure.

Preferably, the axial end of the first hub segment or the second hub segment is formed as an inclined portion at least at a portion where the hub blade positioning structure is disposed.

Preferably, a hub positioning groove is provided on the blade, and the hub positioning groove is disposed at a position on the blade body adjacent to the fixing portion.

Preferably, the impeller is an axial flow impeller.

According to a second aspect of the present application, a wind turbine is provided, comprising an impeller in the present application.

In the impeller of the present application, the detachable connection between the vane and the hub can meet different air volume requirements by installing different vane blades; when the vane is damaged, the vane can be easily replaced without scrapping. The entire impeller. Moreover, the blades and the hub can be stored separately, which can save storage space.

DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from

Figure 1 is a schematic view showing the overall structure of the impeller in the present application;

2 is a schematic exploded view of the entire structure of the impeller in the present application;

Figure 3 is a schematic view showing the structure of a first wheel hub section in the present application;

Figure 3a is a plan view of Figure 3;

Figure 3b is a front view of Figure 3;

Figure 4 is a schematic structural view of a second wheel hub segment in the present application;

Figure 4a is a cross-sectional view of the second hub section of the present application

Figure 5 is a schematic view showing the structure of the blade in the present application;

Figure 5a is a cross-sectional view taken along line A-A of Figure 5;

Figure 5b is an enlarged view of a portion K of Figure 5;

Figure 6 is a front elevational view of the impeller in the present application;

Figure 6a is a cross-sectional view taken along line A-A of Figure 6;

Figure 6b is an enlarged view of the M portion of Figure 6a;

Figure 6c is a cross-sectional view taken along line B-B of Figure 6;

Fig. 6d is an enlarged view of the N portion of Fig. 6c.

detailed description

The invention is described below based on the examples, but the invention is not limited to only these examples.

As shown in FIG. 1-2, the impeller in the present application includes a hub 1 and a vane 2, and the vane 2 is connected to the hub 1, and a motor shaft mounting hole is disposed on an axial center line of the hub 1. 10, used to install the motor shaft. The vane 2 and the hub 1 are detachably connected, so that the vane 2 and the hub 1 are separately placed and packaged separately during normal storage or transportation, which solves the technical problem of inconvenient placement in the prior art. For example, relatively thin, similarly shaped blades 2 can be stacked together. The hub 1 is generally cylindrical in shape and can be conveniently stacked and stored and transported together, and is space-saving and convenient to package.

In a preferred embodiment, the hub 1 is of a split configuration comprising a plurality of hub segments, the blades 2 being disposed between adjacent two hub segments. In a preferred embodiment, a first hub segment 11 and a second hub segment 12 are provided, the first hub segment 11 and the second hub segment 12 being sequentially connected in the axial direction. The motor shaft mounting hole 10 is disposed on the second hub segment 12.

As shown in FIGS. 3 and 4, the first hub segment 11 includes a first end 111 and a second end 112, and the second hub segment 12 includes a first end 121 and a second end 122, the first hub A detachable connection is between the second end 112 of the segment 11 and the first end 121 of the second hub segment 12, the vane 2 being clamped at the second end 112 and the second hub segment of the first hub segment 11. Between the first ends 121 of 12 (described in detail later). A connection structure is provided between the first hub section 11 and the second hub section 12 for connecting the first hub section 11 and the second hub section 12.

As shown in FIGS. 1-4, a first connecting structure 113 of the connecting structure is disposed at the second end 112 of the first hub segment 11 for performing with the first end 121 of the second hub segment 12. connection. Correspondingly, a first connecting structure 123 of the connecting structure is disposed at the first end 121 of the second hub segment 12, and the second connecting structure 123 cooperates with the first connecting structure 113, thereby the first hub The segment 11 and the second hub segment 12 are coupled while clamping the vane 2 between the second end 112 of the first hub segment 11 and the first end 121 of the second hub segment 12. The shape of the second end face of the first hub segment 11 corresponds to the shape of the first end face of the second hub segment 12, and the entire hub 1 is free of gaps after the blade 2 is assembled.

In a preferred embodiment, as shown in Figures 3, 3a, 3b, 4, 4a, the first hub segment 11 includes a first hub ring 114 and a first reinforcement located radially inward of the first hub ring 114. In the portion 115, the first reinforcing portion 115 is preferably a reinforcing plate, but the structure of the first reinforcing portion 115 is not limited to the structural form of the reinforcing plate, and may be other structural forms such as a reinforcing rib. The radially outer side of the first reinforcing portion 115 is connected to the first hub ring 114, and extends inward in the radial direction to a portion where the motor shaft mounting hole 10 is located. After assembly, the radially inner end of the first reinforcing portion 115 abuts. Connected to the part where the motor shaft mounting hole 10 is located. The arrangement of the first reinforcement portion 115 can strengthen the strength of the entire hub 1. Correspondingly, the second hub segment 12 includes a second hub ring 124 and a second reinforcement portion 125 located radially inward of the second hub ring 124, the second reinforcement portion 125 preferably being a stiffener but second The structure of the reinforcing portion 125 is not limited to the structural form of the reinforcing plate as long as the portion where the second hub ring 124 and the motor shaft mounting hole 10 are located can be connected. The number of the first reinforcing portion 115 and the second reinforcing portion 125 is the same as the number of the blades 2, in the week Evenly distributed upwards.

In order to allow the vane 2 to be clamped between the first hub section 1 and the second hub section 2, an inclined portion 126 can be formed on the first end 121 of the second hub section 12, for example In the case where three impellers 2 are provided (as shown in FIGS. 1-2), the first end of the second hub section 12 is provided with three inclined portions 126, and the three inclined portions 126 are uniformly disposed in the circumferential direction on the second hub At the end of the ring 124, between the two inclined portions 126 is a horizontal portion 127 that extends in a plane perpendicular to the hub axis. The distance between the end face of the horizontal portion 127 to the end face of the second end of the second hub segment 12 is determined on a case-by-case basis, preferably ≥ 30 mm. The inclination angle and length of the inclined portion 126 are determined according to the angle of rotation of the blade 2 and the width of the blade 2. Correspondingly, the second end of the first hub segment 11 is formed with a horizontal portion 117 and an inclined portion 116 corresponding to the first end of the second hub segment 12 such that when the first hub segment 11 and the second hub segment 12 are installed After the blade 2 is tightly matched, there is no gap. It will be readily understood that the

horizontal portions

117, 127 may also form a certain angle of inclination such that a serrated structure is formed on the second end 112 of the first hub segment 11 and the first end 121 of the second hub segment 12, which The structure also serves the same connection and positioning. The height of the first hub section 11 can be determined according to the specific situation, and the distance between the side of the inclined portion 116 contacting the blade 2 near the first end 111 and the first end 111 is preferably ≥ 10 mm.

Preferably, the radially inner side of the first reinforcing portion 115 is a free end, and the assembled end abuts on a portion of the motor shaft mounting hole 10 after assembly. The lower surface of the first reinforcing portion 115 (refer to the orientation shown in FIG. 3) extends from the horizontal portion 117 of the second end of the first hub segment 11 by a distance, preferably ≥ 3 mm, the upper surface thereof and the first hub segment The first end 111 of the 11 end face is flush, and the upper surface of the first reinforcing portion 115 has a horizontal end 1151, and the radial end of the horizontal end 1151 is preferably ≥ 10 mm, so that the first reinforcing portion 115 has a reliable strength.

Preferably, the radially outer side of the second reinforcing portion 125 and the second hub ring 124 are connected, and the two may be an integral structure, the upper surface of which is at least partially flush with the horizontal portion 127 of the second hub ring 124. In the flush portion 1251, the radial dimension of the flush portion 1251 is preferably ≥ 10 mm, and the plane between the flush portion 1251 and the portion of the motor shaft mounting hole 10 is an inclined surface.

Preferably, in the circumferential direction, the radially outer sides of the first reinforcing portion 115 and the second reinforcing portion 125 are respectively connected to the portions of the

horizontal portions

117, 127 of the first hub segment 11 and the second hub segment 12, and are located Close to the outlet end of the blade 2. Because the wind blade 2 is subjected to a large force when working, Close to the blade 2 is better, which can increase the overall strength of the impeller.

Further, the first connection structure 113 includes a first connection hole 1131 disposed on the first reinforcement portion 115, and the second connection structure 123 includes a second connection disposed on the second reinforcement portion 125. a hole 1231, when the first hub segment 11 and the second hub segment 12 are combined, the positions of the first connecting hole 1131 and the second connecting hole 1231 are exactly corresponding, and at this time, the first connecting hole can pass through The first hub portion 11 and the second hub segment 12 are fixedly coupled together by inserting a bolt or the like into the second connecting hole 1231. The diameters of the first connecting hole 1131 and the second connecting hole 1231 are preferably ≥3 mm, and the first connecting hole 1131 and the second connecting hole 1231 are in one-to-one correspondence. The distance between the first connecting hole 1131 and the second connecting hole 1231 in the radial direction from the hub wall surface is preferably ≥ 10 mm. Wherein, the first connecting hole 1131 is formed on a portion of the first reinforcing portion 115 extending from the horizontal portion 117 of the second end of the first hub segment 11, such that when the first hub segment 11 and the second hub segment 12 are assembled, the first The extended portion of the reinforcing portion 115 overlaps with the second reinforcing portion 125 such that the positions of the first connecting hole 1131 and the second connecting hole 1231 can correspond.

Preferably, in order to facilitate the mounting and positioning of the first hub segment 11 and the second hub segment 12, the hub 1 of the present application further includes a hub positioning structure disposed between the first hub segment 11 and the second hub segment 12, The hub positioning structure includes a positioning post 1121 disposed at an axial end of the second end 112 of the first hub segment 11, the positioning post 1121 extending in an axial direction of the first hub segment 11. Correspondingly, the hub positioning structure further includes a positioning slot 1211 disposed at an axial end of the first end 121 of the second hub segment 12, the positioning post 1121 being insertable into the positioning slot 1211 for installation The first hub segment 11 and the second hub segment 12 are positioned. In other embodiments, a positioning groove is provided at an axial end of the second end 112 of the first hub segment 11, and a positioning post is disposed at an axial end of the first end 121 of the second hub segment 12. The same fixation. By providing the positioning post and the positioning groove, the first hub segment and the second hub segment can be conveniently positioned while also enhancing the overall strength of the hub 11. The position and size of the positioning post 1121 correspond to the positioning slot 1211 with an interference fit therebetween.

As shown in FIGS. 5, 5a, 5b, the blade 2 includes a blade body 21 and a fixing portion 22 located inside the blade body 21 in the radial direction (the radial direction in the present application refers to the radial direction of the impeller). . The vane 2 is fixed between the first hub section 11 and the second hub section 12 by the fixing portion 22. Preferably, the fixing portion 22 includes a radially inner end toward the blade body 21 The protruding portion 221 extending outside the surface, of course, the protruding portion 221 may extend only to the outside of the radially inner end portion end surface of the blade body 21, and may also function as a fixing, but when extending to the outside of the entire end surface, the fixing portion is fixed. Will be stronger. The dimension H of the protruding portion 221 protruding the end face portion of the blade (as shown in FIG. 6d) is preferably ≥3 mm, and the thickness J of the protruding portion 221 is optimally ≥5 mm. In this way, a secure installation of the blades 2 is ensured.

In order to be able to fix the blade 2 more securely on the hub 1, a blade positioning structure 211 is provided on the blade body 21 adjacent to the fixing portion 22, and the blade positioning structure 211 may be a positioning protrusion, such as a positioning post. Etc., or for positioning grooves, positioning holes, and the like. At the axial end of the first hub segment 11 or the second hub segment 12, a hub blade positioning structure 13 (see FIG. 4) corresponding to the blade positioning structure is provided, the hub blade positioning structure 13 It can cooperate with the blade positioning structure, for example, a positioning groove, a positioning hole, or a structure such as a positioning protrusion (for example, a positioning post). In the embodiment shown in FIG. 4 and FIG. 5, the blade positioning structure 211 is a positioning hole, and the hub blade positioning structure 13 is a positioning column. A positioning post 13 is formed on an axial end of the first end 121 of the second hub segment 12, specifically on an axial end of the second hub ring 124 of the second hub segment 12. Thus, since the second hub ring 124 of the second hub segment 12 has a relatively thin annular wall, the positioning of the positioning post thereon does not affect the strength of the second hub ring 124, and the positioning hole is also provided on the blade body 21 for processing. It will not increase the difficulty of forming the blades. Preferably, the size of the positioning hole 211 is preferably 3 mm, and the position of the hole is determined by the hub blade positioning structure 13. The positioning hole 211 and the positioning post 13 are in one-to-one correspondence, and the two are in a transitional fit (ie, the main size is the same). Preferably, the length of the positioning post 13 is between 3 mm and 10 mm, and the number of positioning posts 13 is optimally 2-6, and the center of the cylinder of the positioning post 13 coincides with the center of the thickness of the hub (ie, the positioning post 13 is located at the inner and outer walls of the hub). The intermediate position between the positions) is preferably 3 mm in diameter.

As shown in Figures 6-6d, during assembly, the fixed portion 22 of the blade is inserted into the first end 121 of the first hub segment 11 and the first end 121 of the second hub segment 12 are fixed. Between the first hub section 11 and the second hub section 12, the radially outer side of the protrusion 221 abuts against the inner wall surface of the first hub section 11 or the second hub section 12 while positioning the blade The structure 211 is inserted into the hub blade positioning structure 13, or the hub blade positioning structure 13 is inserted into the blade positioning structure 211 to clamp the blade 2 while securely positioning and positioning the blade.

Preferably, the hub blade positioning structure 13 and the hub positioning structure are spaced apart in the circumferential direction of the first hub segment 11 or the second hub segment 12, and are specifically spaced apart from the first hub of the first hub segment 11. The circumferential direction of the ring 114 is spaced apart or circumferentially disposed in the circumferential direction of the second hub ring 124 of the second hub segment 12. For example, one blade 2 corresponds to a set of hub blade positioning structures, and at least one hub positioning structure is disposed between each set of hub blade positioning structures. This makes the hub have a uniform force, easy installation and reliable positioning. Specifically, the hub blade positioning structure 13 is disposed on the inclined portion 126 of the second hub segment 12, and the hub positioning structure (positioning groove 1211) is disposed on the horizontal portion 127 of the second hub segment 12.

As shown in FIG. 5 and FIG. 5b, in a preferred embodiment, a hub positioning groove 20 is provided on the blade 2, and the hub positioning groove 20 is disposed on the blade body 21 at a position adjacent to the fixing portion 22. And in the circumferential direction (here, the circumferential direction refers to the circumferential direction of the hub) is located on one side of the blade body 21. Preferably, when the blade 2 is assembled to the hub, the hub positioning groove 20 is located on the lower side of the inclined portion 126 (on the air inlet side of the blade 2). Thus, when the blade 2 is assembled to the hub, the hub positioning groove 20 can be caught on the hub wall opposite thereto, which can increase the rigidity of the assembly of the blade 2 and increase the assembly stability of the blade 2. Preferably, the hub positioning groove 20 is recessed into the blade body 21 to have a size of ≥ 5 mm, and the width of the groove is equal to the thickness of the hub.

The wind wheel in the present application adopts a split structure design. In a specific embodiment, a motor shaft mounting hole is disposed on the second hub segment, and the motor is connected through the hole, and the wheel 1 is rotated when the motor rotates, thereby Drive the blades 2 to rotate. The second wheel hub segment is provided with a positioning post and a positioning hole on the fan blade (the main dimensions of the column and the hole are the same), and the first wheel hub segment is installed after the blade is aligned with the positioning post on the second hub segment. The first wheel hub segment is also provided with a positioning post, and the corresponding positioning groove on the second wheel hub segment has an interference fit (the diameter of the positioning post is slightly larger than the diameter of the positioning groove), thereby ensuring the connection fastening. After the first wheel hub segment is installed, the first connecting hole on the first reinforcing portion of the first wheel hub segment and the second connecting hole on the second reinforcing portion on the second hub segment are screwed together, thereby completing Assembly of the impeller. When it is necessary to replace the blades, remove the screws, remove the first hub section, and reinstall the new structural blades. The structure realizes that the replaceable blades can meet the requirements of different air volumes, and the storage space is saved.

It should be noted that in the present application, such as "first", "second" and the like A relational term is used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply any such actual relationship or order. In addition, the terms "including", "comprising" or "comprising" or "comprising" or "the" Other elements that may be included may also include elements inherent to such a process, method, article, or device. The technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of the invention, unless otherwise defined. The terminology used herein is for the purpose of describing particular embodiments, Terms such as "parts" appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation," "setting," and the like, as used herein, may mean either that one component is attached directly to another component, or that one component is attached to another component through the intermediate component. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is not applicable or otherwise stated in the other embodiment.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

An impeller includes a hub and a vane, the vane being coupled to the hub, wherein the vane and the hub are detachably coupled.
The impeller of claim 1 wherein said hub is of a split configuration comprising a plurality of hub segments, said vanes being disposed between adjacent two hub segments.
The impeller according to claim 2, wherein said plurality of hub segments comprise a first hub segment and a second hub segment, the first hub segment and the second hub segment being sequentially connected in an axial direction.
The impeller according to claim 3, wherein

The first hub segment includes a first end and a second end, the second hub segment including a first end and a second end;

a detachable connection between the second end of the first hub segment and the first end of the second hub segment, the vane being clamped at the second end of the first hub segment and the second hub segment Between one end;

A connection structure is disposed between the first hub segment and the second hub segment.
The impeller according to claim 4, wherein

The first hub segment includes a first hub ring and a first reinforcement located radially inward of the first hub ring;

The second hub segment includes a second hub ring and a second reinforcement portion located radially inward of the second hub ring;

The connecting structure is disposed on the first reinforcing portion and the second reinforcing portion.
The impeller of claim 3 wherein said hub further comprises a hub positioning structure disposed between the first hub segment and the second hub segment.
The impeller according to claim 6, wherein

The hub positioning structure includes a positioning post disposed at an axial end of the second end of the first hub segment, and a positioning groove disposed at an axial end of the first end of the second hub segment; or

The hub positioning structure includes a locating slot disposed at an axial end of the second end of the first hub segment and a locating post disposed at an axial end of the first end of the second hub segment.
The impeller according to claim 3, wherein the vane includes a vane body and a fixing portion located radially inward of the vane body.
The impeller according to claim 8, wherein the fixing portion includes a protruding portion that extends outward of a radially inner end surface of the blade body.
The impeller according to claim 8, wherein

a blade positioning structure is disposed on the blade body adjacent to the fixing portion, and a hub blade corresponding to the blade positioning structure is disposed at an axial end of the first hub segment or the second hub segment Positioning structure.
The impeller according to claim 10, wherein

The blade positioning structure is a positioning protrusion, a positioning groove or a positioning hole;

The hub blade positioning structure is a positioning groove, a positioning hole or a positioning protrusion corresponding to the blade positioning structure.
The impeller according to claim 10, wherein an axial end portion of the first hub segment or the second hub segment is formed as an inclined portion at least at a portion where the hub blade positioning structure is disposed.
The impeller according to claim 8, wherein a hub positioning groove is provided on the blade, and the hub positioning groove is provided at a position on the blade body adjacent to the fixing portion.
The impeller according to any one of claims 1 to 13, wherein the impeller is an axial flow impeller.
A fan comprising the impeller of any of claims 1-14.