CN114526194A

CN114526194A - Sectional type fan blade connecting structure, sectional type fan blade and assembling method

Info

Publication number: CN114526194A
Application number: CN202210161457.5A
Authority: CN
Inventors: 王晨伟; 路绪恒; 王国军; 文欢
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-05-24

Abstract

The invention discloses a sectional type fan blade connecting structure, a sectional type fan blade and an assembling method, wherein a first socket piece, a second socket piece and a fixing assembly are arranged on the same side of a first blade section; the second socket piece is arranged at one end of the second blade segment; the first socket piece and the second socket piece are opposite, mutually crossed and staggered to form a connecting part, and the fixing assembly is arranged at the connecting part to fix the first socket piece and the second socket piece. The connecting structure provided by the invention ensures that the connection of the sectional blades is more reliable, the additional weight of the connecting area is light, and the connecting structure is convenient for factory production and wind field operation.

Description

Sectional type fan blade connecting structure, sectional type fan blade and assembling method

Technical Field

The invention relates to the field of fan blade manufacturing, in particular to a sectional type fan blade connecting structure, a sectional type fan blade and an assembling method.

Background

As wind blades are designed longer and longer, the cost and difficulty of transportation thereof increases significantly. In order to reduce the difficulty of transportation and greatly save the transportation cost, the sectional blade is the subsequent main development trend.

Sectional type fan blades have been developed for a period at home and abroad, but the sectional type fan blades are often connected at sectional positions more complicated, the connection reliability is difficult to guarantee, and the field operability is not simple enough, so that the sectional type fan blades have poor economy, and the sectional type fan blades are not applied to actual wind fields at home and abroad. Therefore, a convenient and reliable connection mode is a technology required by the sectional type fan blade.

In the prior art, the sectional type fan blades are mainly connected in the following three ways:

the first method is to install bolts in embedded bolt sleeves on one side of the blade section, install nuts in holes on the other side of the blade section and fasten the blade section.

However, this connection method has the following problems that the weight is significantly increased due to the bolts, the embedded thread sleeves and the large number of the bolts, and the bolt pretightening force needs to be maintained at a later stage, so that the weight and the cost of the blade are increased.

The second is to mate the two side blades in the area of the main beam and then to make a direct adhesive connection. However, this connection method has a problem that the adhesive strength is insufficient and connection loss is likely to occur.

The third is to connect the two sections of blades by using a glass fiber material layering, vacuum infusion and curing mode, and the connection mode has the problems of long vacuum infusion and curing time, inconvenient operation and poorer economy due to the limitation of field conditions.

Therefore, there is a need for a connection method for a sectional type fan blade, which can solve the above three problems.

Disclosure of Invention

The invention aims to provide a sectional type fan blade connecting structure, a sectional type fan blade and an assembling method.

In order to solve the above problems, the present invention is realized by the following technical scheme:

a segmented fan blade connection structure for connection between adjacent first and second blade segments, the connection structure comprising: a first socket piece, a second socket piece and a fixing component,

the first socket piece is arranged at one end of the first blade section; the second socket is disposed at one end of the second blade section; the first socket piece and the second socket piece are opposite, mutually crossed and staggered to form a connecting part, and the fixing assembly is arranged at the connecting part to fix the first socket piece and the second socket piece.

Optionally, the first socket piece comprises a first pressure surface insert group and a first suction surface insert group which extend in the same direction and are parallel to each other; the first pressure surface insert group is arranged close to the pressure surface of the first blade segment, the first suction surface insert group is arranged close to the suction surface of the first blade segment, and the second socket piece comprises a second pressure surface insert group and a second suction surface insert group which have the same extension direction and are parallel to each other; the second pressure face insert set is disposed proximate the pressure face of the second blade segment, the second suction face insert set is disposed proximate the suction face of the second blade segment, the first pressure face insert set and the second pressure face insert set are opposed and are disposed in a cross-over, staggered arrangement; the first suction surface insert group and the second suction surface insert group are opposite and are arranged in a mutually crossed and staggered mode.

Optionally, the first pressure surface insert group includes a plurality of first pressure surface inserts, the plurality of first pressure surface inserts are arranged at intervals from the leading edge to the trailing edge of the first blade segment, the second pressure surface insert group includes a plurality of second pressure surface inserts, the plurality of second pressure surface inserts are arranged at intervals from the leading edge to the trailing edge of the second blade segment, a gap between two adjacent first pressure surface inserts forms a first socket, the first socket is matched with the second pressure surface inserts, and each second pressure surface insert is correspondingly inserted into the first socket; and a gap between every two adjacent second pressure surface insertion pieces forms a second socket slot, the second socket slot is matched with the first pressure surface insertion pieces, and each first pressure surface insertion piece is correspondingly inserted into the second socket slot.

Optionally, the first suction surface insert group comprises a plurality of first suction surface inserts, a plurality of first suction surface inserts are arranged at intervals from the front edge to the rear edge of the first blade segment, the second suction surface insert group comprises a plurality of second suction surface inserts, a plurality of second suction surface inserts are arranged at intervals from the front edge to the rear edge of the second blade segment, a gap between two adjacent first suction surface inserts forms a third socket, the third socket is matched with the second suction surface inserts, and each second suction surface insert is correspondingly inserted into the third socket; and a gap between every two adjacent second suction surface insertion pieces forms a fourth socket, the fourth socket is matched with the first suction surface insertion pieces, and each first suction surface insertion piece is correspondingly inserted into the fourth socket.

Optionally, the fixing component comprises a plurality of bolts and a plurality of nuts matched with the bolts,

each bolt penetrates through the connecting part and then is matched with the nut so as to fix the connecting part.

Optionally, the fixing assembly further includes a pressure panel and a suction panel, the pressure panel is disposed on the connecting portion and located on a pressure surface, and the suction panel is disposed on the connecting portion and located on a suction surface; the pressure panel and the suction panel are mutually covered and form-matched with the first blade segment and the second blade segment.

Optionally, a first splicing seam and a second splicing seam are respectively formed between two sides of the pressure panel and the first blade segment and the second blade segment; a third splicing seam and a fourth splicing seam are respectively formed between two sides of the suction panel and the first blade segment and between two sides of the suction panel and the second blade segment; and the first splicing seam and the fourth splicing seam are bonded by adopting an adhesive or are connected by adopting a connecting piece.

Optionally, the pressure panel and the suction panel are both made of glass fiber reinforced plastic.

Optionally, a first fiberglass material is laid between the first pressure surface insert group and the pressure surface of the first blade section; a second glass fiber material is laid between the first suction surface insert group and the suction surface of the first blade section; a third glass fiber material is laid between the second pressure surface insert group and the pressure surface of the second blade segment; and a fourth glass fiber material is laid between the second suction surface insert group and the suction surface of the second blade segment.

Optionally, the first glass fiber material to the fourth glass fiber material are all reinforced fiber woven cloth.

Optionally, the woven reinforcing fiber fabric is a single-axial woven fabric, a double-axial woven fabric, or a triple-axial woven fabric.

Optionally, a core material is disposed at a position in the first and second blade segments where the first and second sockets are not disposed.

Optionally, the core material is balsa wood or a PET material or a PVC material.

Optionally, the first socket piece and the second socket piece are made of glass fiber reinforced plastic materials.

Optionally, the first socket piece and the second socket piece are both cuboid in shape as a whole; and one ends of the first socket piece and the second socket piece, which are positioned in the corresponding blade sections, are provided with wedges or chamfers.

Optionally, the lengths of the first socket and the second socket are in a range of 1000mm to 2000mm, respectively.

In another aspect, the present invention further provides a sectional fan blade, which includes at least two blade sections, and two adjacent blade sections are connected by using the above-mentioned sectional fan blade connection structure.

In another aspect, the present invention further provides a method for assembling a sectional fan blade, including: embedding the first end of the first socket piece at one end of the first blade section; embedding the first end of the second socket piece at one end of the second blade segment; the second ends of the first socket piece and the second socket piece are opposite and are arranged in a mutually crossed and staggered mode to form a connecting part, and a fixing component is arranged at the connecting part to fix the first socket piece and the second socket piece.

Optionally, before forming the connection portion, the method further includes: glass fiber materials are respectively paved between the pressure surface and the suction surface of the first socket piece and the first blade segment, glass fiber materials are respectively paved between the pressure surface and the suction surface of the second socket piece and the second blade segment, and core materials are arranged at positions where the first socket piece and the second socket piece are not arranged in the first blade segment and the second blade segment.

Optionally, the method further comprises: placing a first blade segment and a second blade segment at specified positions and keeping a stable state, wherein a first through hole is preset in a second end of the first socket piece, a second through hole is preset in a second end of the second socket piece, the second end of the first socket piece and the second end of the first socket piece are opposite and staggered, so that the first through hole is opposite to the corresponding second through hole, a bolt correspondingly penetrates through the first through hole and the second through hole, and then the connecting part is fastened by adopting the corresponding bolt; arranging a prefabricated pressure panel on the pressure surface of the connecting part; arranging a prefabricated suction panel on the suction surface of the connecting part; after the pressure panel and the suction panel are mutually covered, the pressure panel is respectively bonded and fixed with the joints between the first blade segments and the second blade segments by adhesives or fixed by connecting pieces; bonding or connecting and fixing the suction panel and the joint between the first blade segment and the second blade segment by using an adhesive or a connecting piece; and after the adhesive is cured or the connecting pieces are firmly connected, the first blade segment and the second blade segment are assembled and connected.

The invention has at least one of the following advantages:

the sectional type fan blade provided by the invention is mechanically connected with the glass fiber composite material through the bolt, and the structure and the method for manually pasting the glass fiber on the outer surface of the blade are used for connecting and assembling the glass fiber, so that the following effects can be achieved:

the invention has the advantages of strong bearing capacity, high connection strength and reliability by using the fixing component such as the shear bolt (specifically, such as a rivet or a high-locking bolt) and the glass fiber composite material (the first socket piece and the second socket piece) for mechanical connection in the blade section.

The fixing assembly provided by the invention has the advantages of simple field operation and improvement on field assembly efficiency.

In the fixing assembly provided by the invention, the corresponding pressure panel and suction panel are fixed outside the blade section through adhesives or connecting pieces, so that the aerodynamic appearance of the blade is ensured.

The invention provides a sectional type fan blade connecting structure and an assembling method thereof, which enable the connection of sectional type fan blades to be more reliable, have simple connecting method and light additional weight of a connecting area, and are convenient for factory production and field operation of a wind field.

Drawings

Fig. 1 is a main structural schematic diagram of a connection structure of a sectional type fan blade according to an embodiment of the present invention;

fig. 2 is a main structural schematic view of a connection structure of a sectional fan blade according to an embodiment of the present invention, which is formed by connecting connection portions with bolts;

fig. 3 is a schematic cross-sectional view of a connection portion of a connection structure of a sectional type fan blade according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a pressure panel and a suction panel provided at a connection portion of a connection structure of a sectional type fan blade according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connection structure of a sectional type fan blade according to an embodiment of the present invention after the blade segments are connected.

Detailed Description

The present invention provides a sectional type fan blade connection structure, a sectional type fan blade and an assembling method thereof, which are described in further detail below with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

As shown in fig. 1, the present embodiment provides a sectional type fan blade connection structure for connection between a first blade segment 1 and a second blade segment 2 which are adjacent to each other, the connection structure including: the first socket piece, the second socket piece and fixed subassembly.

The first socket piece is arranged at one end of the first blade section 1; the second socket is arranged at one end of the second blade section 2; the first socket piece and the second socket piece are opposite, crossed and staggered with each other to form a connecting part, and the fixing component is arranged at the connecting part to fix the first socket piece and the second socket piece.

With continued reference to fig. 1, the first socket includes a first pressure surface insert set and a first suction surface insert set extending in the same direction and parallel to each other.

The first pressure surface insert group is arranged adjacent to the pressure surface of the first blade segment 1 and the first suction surface insert group is arranged adjacent to the suction surface of the first blade segment 1.

It will be appreciated that the first pressure surface insert groups may be laid out integrally or in regions according to the tendency of the airfoil curvature of the blade, and that the first pressure surface insert groups may be laid out integrally within the ends of the first blade section 1, whereby in this embodiment, as shown in fig. 1, the first pressure surface insert groups may be divided into two groups, denoted as first sub pressure surface insert group 31 and second sub pressure surface insert group 32, first suction surface insert group 33.

The second socket piece comprises a second pressure surface insert group and a second suction surface insert group which have the same extension direction and are parallel to each other.

The second pressure face insert set is positioned adjacent the pressure face of the second blade segment 2 and the second suction face insert set is positioned adjacent the suction face of the second blade segment 2.

It will be appreciated that the second pressure surface insert groups may be laid integrally or in regions according to the tendency of the airfoil curvature of the blade, and the second suction surface insert groups may be laid integrally within the end of the second blade segment 2, whereby in this embodiment, as shown in figure 1, the second pressure surface insert groups may be divided into two groups, denoted as third sub pressure surface insert group 41 and fourth sub pressure surface insert group 42.

The first pressure surface insert group and the second pressure surface insert group are opposite and are arranged in a mutually crossed and staggered mode.

Specifically, the first sub pressure surface insert group 31 and the third sub pressure surface insert group 41 are arranged oppositely, crossly and staggeredly; the second sub pressure face insert set 32 and the fourth sub pressure face insert set 42 are opposed and staggered with respect to each other.

The first suction surface insert group 33 and the second suction surface insert group 43 are arranged opposite to each other and are staggered with each other.

With continued reference to fig. 1, the first pressure surface insert group comprises a plurality of first pressure surface inserts, and the plurality of first pressure surface inserts are spaced along the leading edge to the trailing edge of the first blade segment 1.

The second pressure surface insert set includes a plurality of second pressure surface inserts spaced apart from one another along a leading edge to a trailing edge of the second blade segment.

A first socket groove is formed by a gap 5 between two adjacent first pressure surface insertion pieces, the first socket groove is matched with the second pressure surface insertion pieces, and each second pressure surface insertion piece is correspondingly inserted into the first socket groove; and a gap 5 between every two adjacent second pressure surface insertion pieces forms a second socket slot, the second socket slot is matched with the first pressure surface insertion pieces, and each first pressure surface insertion piece is correspondingly inserted into the second socket slot.

With continued reference to fig. 1, the first suction surface insert group 33 includes a plurality of first suction surface inserts, a plurality of first suction surface inserts are spaced along the leading edge to the trailing edge of the first blade segment, the second suction surface insert group 43 includes a plurality of second suction surface inserts, a plurality of second suction surface inserts are spaced along the leading edge to the trailing edge of the second blade segment, a gap 5 between two adjacent first suction surface inserts forms a third socket, the third socket is matched with the second suction surface inserts, and each second suction surface insert is correspondingly inserted into the third socket; and a gap between every two adjacent second suction surface insertion pieces forms a fourth socket, the fourth socket is matched with the first suction surface insertion pieces, and each first suction surface insertion piece is correspondingly inserted into the fourth socket.

To facilitate understanding of the positional relationship of the socket described above, the positional relationship between the second sub pressure surface insert set 32 and the fourth sub pressure surface insert set 42 is described below as an example, for example, the second sub pressure surface insert set 32 includes 3 first pressure surface inserts, and two spaces between the 3 first pressure surface inserts are two first socket grooves.

The fourth sub pressure surface insert group 42 comprises 2 second pressure surface inserts, one space between the 2 second pressure surface inserts is a second socket groove, the 2 second pressure surface inserts are respectively inserted between the two first socket grooves, wherein the first pressure surface insert positioned in the middle of the 3 first pressure surface inserts is inserted into the second socket groove, and so on, and the other inserts are also in the same position relation.

As shown in fig. 2, the fixing assembly includes a plurality of bolts 6 and a plurality of nuts 7 matched with the bolts, and each bolt 6 penetrates through the connecting portion and then is matched with the nut 7 to fix the connecting portion. It will be appreciated that for sub-area laying, the bolts 6 are intended to extend through corresponding parts of the connection, rather than through the entire connection.

With continued reference to fig. 2, in the present embodiment, the number of the bolts is three, and the bolts are high-strength shear studs.

As shown in fig. 1 to 3, in the present embodiment, the connecting portion is divided into a plurality of portions, specifically, three portions, wherein the first sub pressure surface insert group 31 and the third sub pressure surface insert group 41 are disposed opposite to each other and crossed and displaced to form a first portion of the connecting portion, the second sub pressure surface insert group 32 and the fourth sub pressure surface insert group 42 are disposed opposite to each other and crossed and displaced to form a second portion of the connecting portion, and the first suction surface insert group 33 and the second suction surface insert group 43 are disposed opposite to each other and crossed and displaced to form a third portion of the connecting portion. One or more of said bolts 6 are used to fit through said first part and said nuts 7 to fix said first part, one or more of said bolts 6 are used to fit through said second part and said nuts 7 to fix said second part, and one or more of said bolts 6 are used to fit through said third part and said nuts 7 to fix said third part.

Specifically, each pressure surface insert in the first sub-pressure surface insert group 31 is provided with a through hole, each pressure surface insert in the third sub-pressure surface insert group 41 is provided with a through hole, after the first sub-pressure surface insert group 31 and the third sub-pressure surface insert group 41 are arranged oppositely, in a mutually crossed and staggered manner, all the through holes are opposite, a stud 6 penetrates through the through holes in all the first sub-pressure surface insert group 31 and the third sub-pressure surface insert group 41, two nuts 7 are respectively arranged at two ends of the stud 6, and a certain pre-tightening force is applied; cotter pins 20 are installed at both sides of the stud bolt 6 for preventing the nut 7 from falling off.

The second sub pressure face insert set 32 and the fourth sub pressure face insert set 42 are opposed and staggered with respect to each other.

Each pressure surface insert in the second sub pressure surface insert group 32 is provided with a through hole, each pressure surface insert in the fourth sub pressure surface insert group 42 is provided with a through hole, after the second sub pressure surface insert group 32 and the fourth sub pressure surface insert group 42 are opposite and mutually crossed and staggered, all the through holes are opposite, a stud bolt 6 penetrates through the through holes in the second sub pressure surface insert group 32 and the fourth sub pressure surface insert group 42, two nuts 7 are respectively arranged at two ends of the stud bolt 6, and a certain pre-tightening force is applied; cotter pins 20 are installed at both sides of the stud bolt 6 for preventing the nut 7 from falling off.

Each suction surface insert in the first suction surface insert group 33 is provided with a through hole, each suction surface insert in the second suction surface insert group 43 is provided with a through hole, after the first suction surface insert group 33 and the second suction surface insert group 43 are arranged oppositely, in a mutually crossed and staggered manner, all the through holes are opposite, a stud 6 penetrates through the through holes in all the second sub-pressure surface insert groups 32 and the fourth sub-pressure surface insert group 42, two nuts 7 are respectively arranged at two ends of the stud 6, and a certain pre-tightening force is applied; cotter pins 20 are installed at both sides of the stud bolt 6 for preventing the nut 7 from falling off. All the through holes are circular through holes, but the invention is not limited to this, and the through holes can be square, rectangular and oval.

In the present embodiment, the bolts shown in fig. 2 are single-row bolts, and it is understood that the bolts can be used to connect and fix two or more rows of studs 6 in a connecting portion.

As shown in fig. 4, the fixing assembly further includes a pressure panel 14 and a suction panel 15, the pressure panel 14 is disposed on the connecting portion and located on the pressure side, and the suction panel 15 is disposed on the connecting portion and located on the suction side; said pressure panel 14 and said suction panel 15 are mutually covering and conformal to said first blade segment 1 and said second blade segment 2; so that the first blade section 1 and the second blade section 2 are in smooth transition and the blade shape is ensured.

As shown in fig. 5, a first splicing seam 18 and a second splicing seam 19 are respectively formed between two sides of the pressure panel 14 and the first blade segment 1 and the second blade segment 2; a third splicing seam and a fourth splicing seam are respectively formed between two sides of the suction panel 15 and the first blade segment 1 and the second blade segment 2; and the first splicing seam and the fourth splicing seam are bonded by adopting an adhesive or are connected by adopting a connecting piece.

The adhesive has high strength, can bear large load, is resistant to aging, fatigue and corrosion, has stable performance in the expected life, and is preferably epoxy structural adhesive.

In this embodiment, the pressure panel 14 and the suction panel 15 are made of glass fiber reinforced plastic.

With continued reference to fig. 3, in the present embodiment, a first glass fiber material 13 is laid between the first pressure surface insert group and the pressure surface of the first blade section 1; a second glass fiber material 12 is laid between the first suction surface insert group 33 and the suction surface of the first blade section 1; a third glass fiber material is laid between the second pressure surface insert group and the pressure surface of the second blade segment 2; a fourth glass fibre material is laid between the second suction surface insert group 43 and the suction surface of the second blade section 2.

In this embodiment, the first to fourth glass fiber materials are all woven cloth of reinforcing fibers.

The reinforced fiber woven cloth is single-axial woven cloth, double-axial woven cloth or triaxial woven cloth. The gram weight of the reinforcing fiber woven cloth is 600-1500 gsm.

With continued reference to fig. 3 and 5, core materials are disposed in the first blade segment 1 and the second blade segment 2 at positions where the first socket and the second socket are not disposed.

Using core material 11 close to the trailing edge 16 to make a certain chamfer transition in the chordwise direction of the blade close to the pressure surface of the blade; the core material 10 near the leading edge 17 is used to make a transition with a certain chamfer angle in the chordwise direction of the blade,

the transition is performed by using the core material 9 close to the rear edge 16 in the chord direction of the blade close to the suction surface of the blade and by using the core material 8 close to the front edge 17 in the chord direction of the blade.

The core material is made of Balsa wood or PET (polyethylene terephthalate) material or PVC (Polyvinyl chloride) material.

In this embodiment, the first socket and the second socket are made of glass fiber reinforced plastic materials with good quality.

In this embodiment, the specific shape of each first socket member and each second socket member may be the same, specifically, each first socket member and each second socket member are rectangular parallelepiped, a first end of each first socket member is located in the first blade section (specifically, the first socket member may be fixed inside the first blade section by laying a glass fiber material on a surface of each first socket member close to a transverse axis (blade root-blade tip direction) of the first blade section or a surface of each first socket member far from the transverse axis), and a second end of each first socket member extends to the outside of the first blade section along the axial direction of the first blade section.

The first end of each second socket is located in the second blade segment (specifically, a glass fiber material may be laid on one surface of each second socket close to the transverse axis (blade root-blade tip direction) of the second blade segment or one surface of each second socket far from the transverse axis, and the first end of each second socket is fixed inside the second blade segment by the glass fiber material), and the second end of each second socket extends to the outside of the second blade segment along the axial direction of the second blade segment.

The first end is a wedge or a chamfer machined by a cuboid. The wedge or chamfer is easy to lay the glass fiber material above and enables the glass fiber material to realize smooth transition.

The second end of each first socket piece is correspondingly inserted into the space 5 formed by the second ends of two adjacent second socket pieces, and the second end of each second socket piece is correspondingly inserted into the space 5 formed by the second ends of two adjacent first socket pieces.

The first socket piece and the second socket piece are all rectangular integrally, so that the rectangular connecting piece is convenient to machine and easy to align and limit when in connection.

The whole length range of the first socket piece and the second socket piece is 1000mm-2000mm, the length of the second end of the exposed blade segment can be 300 mm-800 mm, preferably 550mm, and the blade has the advantages of mature application at the root end of the blade, high reliability and capability of ensuring bearing capacity under the condition of weight reduction. The radial width of the first socket piece and the second socket piece ranges from 50mm to 100mm, and preferably ranges from 50 mm.

On the other hand, this embodiment still provides a sectional type fan blade, includes two at least blade sections, adopts the sectional type fan blade connection structure as above to connect between two adjacent blade sections.

In another aspect, the present embodiment further provides an assembling method of a sectional type fan blade, including: embedding the first end of the first socket piece at one end of the first blade section; embedding the first end of the second socket piece at one end of the second blade segment; the second ends of the first socket piece and the second socket piece are opposite and are arranged in a mutually crossed and staggered mode to form a connecting part, and a fixing component is arranged at the connecting part to fix the first socket piece and the second socket piece.

In this embodiment, before forming the connecting portion, the method further includes: glass fiber materials are respectively paved between the pressure surface and the suction surface of the first socket piece and the first blade segment, glass fiber materials are respectively paved between the pressure surface and the suction surface of the second socket piece and the second blade segment, and core materials are arranged at positions where the first socket piece and the second socket piece are not arranged in the first blade segment and the second blade segment.

In this embodiment, the method further includes: placing a first blade segment and a second blade segment at specified positions and keeping a stable state, wherein a first through hole is preset in a second end of the first socket piece, a second through hole is preset in a second end of the second socket piece, the second end of the first socket piece and the second end of the first socket piece are opposite and staggered, so that the first through hole is opposite to the corresponding second through hole, a bolt correspondingly penetrates through the first through hole and the second through hole, and then the connecting part is fastened by adopting the corresponding bolt; arranging a prefabricated pressure panel on the pressure surface of the connecting part; arranging a prefabricated suction panel on the suction surface of the connecting part; after the pressure panel and the suction panel are mutually covered, the pressure panel is respectively bonded and fixed with the joints between the first blade segments and the second blade segments by adhesives or fixed by connecting pieces; bonding or connecting and fixing the suction panel and the joint between the first blade segment and the second blade segment by using an adhesive or a connecting piece; and after the adhesive is cured or the connecting pieces are firmly connected, the first blade segment and the second blade segment are assembled and connected.

In conclusion, the sectional type fan blade that this embodiment provided carries out inside mechanical connection through bolt and glass fiber composite to and blade surface hand is pasted glass fiber and is connected and assembly structure and method, can reach following effect:

the present embodiment provides a strong load-bearing capacity, a high connection strength, and a more reliable mechanical connection by using a fixing assembly such as a shear bolt (specifically, such as a rivet or a high-lock bolt) and a glass fiber composite material (a first socket member and a second socket member) inside the blade segment.

The fixing assembly provided by the embodiment has the advantages of being simple in field operation and improving field assembly efficiency.

The fixing assembly provided by the embodiment fixes the corresponding pressure panel and the suction panel outside the blade section through the adhesive, so that the aerodynamic shape of the blade is ensured.

The embodiment provides a sectional type fan blade connecting structure and an assembling method thereof, so that the sectional type fan blade is more reliable in connection, simple in connection method, light in additional weight of a connection area, and convenient for factory production and wind field operation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it is to be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims

1. A sectional type fan blade connection structure for the connection between adjacent first blade section and second blade section, its characterized in that, connection structure includes: a first socket piece, a second socket piece and a fixing component,

the first socket piece is arranged at one end of the first blade section;

the second socket member is disposed at one end of the second blade segment;

the first socket piece and the second socket piece are opposite, mutually crossed and staggered to form a connecting part,

the fixing component is arranged at the connecting part to fix the first socket piece and the second socket piece.

2. The segmented fan blade connection of claim 1 wherein the first socket includes a first set of pressure face inserts and a first set of suction face inserts extending in the same direction and parallel to each other;

the first pressure surface insert set is disposed proximate a pressure surface of the first blade segment,

the first suction surface insert set is disposed proximate a suction surface of the first blade segment,

the second socket piece comprises a second pressure surface insert group and a second suction surface insert group which have the same extension direction and are parallel to each other;

the second pressure surface insert set is disposed proximate a pressure surface of the second blade segment,

the second suction surface insert set is positioned adjacent the suction surface of the second blade segment,

the first pressure surface insert group and the second pressure surface insert group are opposite and are arranged in a mutually crossed and staggered manner;

the first suction surface insert group and the second suction surface insert group are opposite to each other and are arranged in a mutually crossed and staggered mode.

3. The segmented fan blade connection of claim 2, wherein the first pressure face insert set comprises a plurality of first pressure face inserts spaced along the first blade segment from a leading edge to a trailing edge thereof,

the second pressure surface insert group includes a plurality of second pressure surface inserts spaced apart from each other along a leading edge to a trailing edge of the second blade segment,

a first socket groove is formed by a gap between two adjacent first pressure surface insertion pieces, the first socket groove is matched with the second pressure surface insertion pieces, and each second pressure surface insertion piece is correspondingly inserted into the first socket groove;

and a gap between every two adjacent second pressure surface insertion pieces forms a second socket slot, the second socket slot is matched with the first pressure surface insertion pieces, and each first pressure surface insertion piece is correspondingly inserted into the second socket slot.

4. The segmented fan blade connection of claim 3,

the first suction surface insert set includes a plurality of first suction surface inserts spaced along the first blade segment from the leading edge to the trailing edge,

the second suction surface insert group includes a plurality of second suction surface inserts spaced apart from each other along a leading edge to a trailing edge of the second blade segment,

a third socket groove is formed by a gap between two adjacent first suction surface insertion pieces, the third socket groove is matched with the second suction surface insertion pieces, and each second suction surface insertion piece is correspondingly inserted into the third socket groove;

and a gap between every two adjacent second suction surface insertion pieces forms a fourth socket, the fourth socket is matched with the first suction surface insertion pieces, and each first suction surface insertion piece is correspondingly inserted into the fourth socket.

5. The segmented fan blade connection of claim 4 wherein the securing assembly comprises a plurality of bolts and a plurality of nuts that mate with the bolts,

6. The segmented fan blade connection of claim 5 wherein the fixture assembly further comprises a pressure panel disposed on the connection at a pressure side and a suction panel disposed on the connection at a suction side;

the pressure panel and the suction panel are mutually covered and form-matched with the first blade segment and the second blade segment.

7. The segmented fan blade connection of claim 6, wherein a first and second splice seam are formed between two sides of the pressure panel and the first and second blade segments, respectively;

a third splicing seam and a fourth splicing seam are respectively formed between two sides of the suction panel and the first blade segment and between two sides of the suction panel and the second blade segment;

and the first splicing seam and the fourth splicing seam are bonded by adopting an adhesive or are connected by adopting a connecting piece.

8. The segmented fan blade connection of claim 7 wherein the pressure panel and the suction panel are each made of fiberglass.

9. The segmented fan blade connection of claim 8,

a first glass fiber material is laid between the first pressure surface insert group and the pressure surface of the first blade section;

a second glass fiber material is laid between the first suction surface insert group and the suction surface of the first blade section;

a third glass fiber material is laid between the second pressure surface insert group and the pressure surface of the second blade segment;

and a fourth glass fiber material is laid between the second suction surface insert group and the suction surface of the second blade segment.

10. The segmented fan blade connection of claim 9,

the first glass fiber material to the fourth glass fiber material are all reinforced fiber woven cloth.

11. The segmented fan blade connection structure of claim 10, wherein the woven cloth of reinforcing fibers is a single axial woven cloth, a double axial woven cloth, or a triple axial woven cloth.

12. The segmented fan blade connection of claim 11, wherein a core material is disposed within the first and second blade segments at locations where the first and second sockets are not disposed.

13. The segmented fan blade connection of claim 12 wherein the core material is balsa wood or PET or PVC.

14. The segmented fan blade connection of claim 13, wherein the first socket and the second socket are made of a fiberglass material.

15. The segmented fan blade connection of claim 14 wherein the first socket and the second socket are each generally rectangular; and one ends of the first socket piece and the second socket piece, which are positioned in the corresponding blade sections, are provided with wedges or chamfers.

16. The segmented fan blade connection of claim 15 wherein the lengths of the first socket and the second socket each range from 1000mm to 2000 mm.

17. A segmented fan blade comprising at least two blade segments, wherein adjacent blade segments are connected by a segmented fan blade connection according to any of claims 1-16.

18. The method of assembling a segmented fan blade of claim 17, comprising:

embedding the first end of the first socket piece at one end of the first blade section;

embedding the first end of the second socket piece at one end of the second blade segment;

the second ends of the first socket piece and the second socket piece are opposite and are mutually crossed and staggered to form a connecting part,

and fixing the first socket piece and the second socket piece by adopting a fixing component arranged at the connecting part.

19. The method of assembling a segmented fan blade according to claim 18, further comprising, prior to forming the connection: glass fiber materials are respectively paved between the first socket piece and the pressure surface and the suction surface of the first blade segment,

glass fiber materials are respectively paved between the second socket piece and the pressure surface and the suction surface of the second blade segment,

a core material is disposed at a location within the first and second blade segments where the first and second sockets are not disposed.

20. The method of assembling a segmented fan blade of claim 19,

further comprising: placing a first blade segment and a second blade segment at specified positions and keeping a stable state, wherein a first through hole is preset in a second end of the first socket piece, a second through hole is preset in a second end of the second socket piece, the second end of the first socket piece and the second end of the first socket piece are opposite and staggered, so that the first through hole is opposite to the corresponding second through hole, a bolt correspondingly penetrates through the first through hole and the second through hole, and then the connecting part is fastened by adopting the corresponding bolt;

arranging a prefabricated pressure panel on the pressure surface of the connecting part;

arranging a prefabricated and molded suction panel on the suction surface of the connecting part;

after the pressure panel and the suction panel are mutually covered, the pressure panel is respectively bonded and fixed with the joints between the first blade segments and the second blade segments by adhesives or fixed by connecting pieces;

bonding and fixing the suction panel and the joint between the first blade segment and the second blade segment by using an adhesive or a connecting piece; and after the adhesive is cured or the connecting pieces are firmly connected, the first blade segment and the second blade segment are assembled and connected.