Expansion connecting assembly for wind driven generator

Abstract

The utility model relates to an expansion connecting assembly for a wind driven generator, which is characterized in that the expansion connecting assembly comprises an outer sleeve, an inner taper sleeve and a connecting bolt, the front end of the outer sleeve is provided with a plurality of expansion grooves arranged along the axial direction of the outer sleeve, and the plurality of expansion grooves enable the front end of the outer sleeve to form a plurality of expansion elastic sheets capable of expanding outwards. The inner taper sleeve is arranged in the outer sleeve, and the outer sleeve and the inner sleeve are connected into a whole through a connecting bolt. According to the utility model, the installation is simple and fast, the two connected flanges are free from centering, the position error between the connecting holes is eliminated through the expansion of the bolts, the load is uniformly distributed, the stress peak in each single hole can be reduced, and the disassembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting assembly, in particular to an expansion connecting assembly for wind driven generator. BACKGROUND

[0002] At present, multiple components in the wind driven generator are connected by ordinary bolts, and the bolts are also the key connecting components in the installation of the wind power equipment, therefore, the connection between the components must ensure the stability and safety of the wind power equipment, since the ordinary bolt for the flange connection in the prior art is affected by the centering degree during the installation of the flange, the flange holes on both sides cannot be prepared to be aligned, which easily leads to the difficulty in bolt installation, and in serious cases, the bolt is loose or fails, thereby affecting the stability and safety of the wind driven generator, and since the stress between each bolt is uneven during the installation of the bolt, the bolt cannot bear higher shear force, is not easy to assemble and disassemble for multiple times, and needs to be matched with a hydraulic system to be successfully disassembled, so that the installation and maintenance cost is high. SUMMARY

[0003] The utility model discloses a kind of expansion connecting assemblies for wind driven generator, which are simple and fast to install, and the two flanges to be connected are exempted from centering, position errors between each connecting hole are eliminated by bolt expansion, load is evenly distributed, stress peak in each single hole is reduced, and disassembly efficiency is improved.

[0004] To achieve the above object, the technical scheme of the utility model is as follows: an expansion connecting assembly for wind driven generator, which is characterized by comprising an outer sleeve, an inner taper sleeve and a connecting bolt, the front end of the outer sleeve is provided with a plurality of expansion grooves arranged along the axial direction thereof, and the plurality of expansion grooves construct a plurality of expansion springs at the front end of the outer sleeve which can expand outward, the inner taper sleeve is arranged in the outer sleeve, and the outer sleeve and the inner sleeve are connected into one body by the connecting bolt.

[0005] In the above technical scheme, the outer sleeve comprises a bolt connecting portion and a taper sleeve connecting portion connected into one body, the bolt connecting portion has a bolt hole, the taper sleeve connecting portion has a plurality of expansion springs, the inner taper sleeve is arranged in the taper sleeve connecting portion, and the expansion springs are wrapped around the outer periphery of the inner taper sleeve, and the connecting bolt is connected with the bolt hole of the bolt connecting portion and is screwed into one body with the inner taper sleeve at the same time.

[0006] In the above technical scheme, the inner taper sleeve comprises a straight body and a tapered body connected into one body, the taper sleeve connecting portion has a limiting step, the straight body is arranged at the limiting step of the taper sleeve connecting portion and is axially limited, and the expansion springs are wrapped around the outer periphery of the tapered body of the inner taper sleeve.

[0007] In the above technical scheme, the inner hole of the taper sleeve connecting portion is a tapered hole which is tightly fitted with the tapered body.

[0008] In the above technical solution, the straight body has a connecting hole, the connecting bolt is threadedly connected with the bolt hole of the bolt connecting part, and the end of the connecting bolt is connected with the connecting hole of the straight body.

[0009] In the above technical solution, the outer periphery of the expansion spring is provided with an elastic groove which reduces the structural strength and improves the outward expansion of the expansion spring.

[0010] The wind driven generator expansion connecting assembly has the following advantages: the wind driven generator expansion connecting assembly comprises an outer sleeve, an inner sleeve and a connecting bolt, the front end of the outer sleeve is provided with a plurality of expansion grooves arranged along the axial direction of the outer sleeve, the plurality of expansion grooves construct the front end of the outer sleeve into a plurality of expansion springs which can expand outward, the inner sleeve is arranged in the outer sleeve, and the outer sleeve and the inner sleeve are integrated through the connecting bolt,

[0011] The wind driven generator expansion connecting assembly has the following advantages: the wind driven generator expansion connecting assembly comprises an outer sleeve, an inner sleeve and a connecting bolt, the front end of the outer sleeve is provided with a plurality of expansion grooves arranged along the axial direction of the outer sleeve, the plurality of expansion grooves construct the front end of the outer sleeve into a plurality of expansion springs which can expand outward, the inner sleeve is arranged in the outer sleeve, and the outer sleeve and the inner sleeve are integrated through the connecting bolt,

[0012] Meanwhile, the wind driven generator expansion connecting assembly has the following advantages:

[0013] First, the efficiency and reliability of the wind driven generator can be improved,

[0014] Second, the wind driven generator can bear higher shear force, and is easy to assemble and disassemble multiple times without using a hydraulic system,

[0015] Third, the wind driven generator is simple and convenient to install and can reduce the stress peak value in the hole during disassembly,

[0016] Fourth, the cost is relatively low, and the wind driven generator is suitable for large-scale wind driven generator construction projects. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of one specific embodiment of the wind driven generator expansion connecting assembly;

[0018] Figure 2 is a perspective view of the wind driven generator expansion connecting assembly. DETAILED DESCRIPTION

[0019] The utility model is further explained below in combination with the drawings and the embodiments given below, but is not limited to this.

[0020] As Figure 1 , 2 shown, a kind of wind-driven generator with expansion connection assembly, including outer sleeve 1, inner cone sleeve 2 and connecting bolt 3, the front end of the outer sleeve 1 is equipped with multiple expansion grooves 11 along its axial arrangement, and multiple expansion grooves 11 constructs the multiple expansion spring 12 of the front end of outer sleeve 1 outwardly expandable, the inner cone sleeve 2 is arranged in outer sleeve 1, and outer sleeve 1 and inner sleeve 2 are connected into one by connecting bolt 3.

[0021] Further, as Figure 1 Shown, to form expansion connection structure, eliminate the position error between each connecting hole, the outer sleeve 1 of the utility model includes bolt connection portion 13 and cone sleeve connection portion 14 connected into one, the bolt connection portion 13 has bolt hole, the cone sleeve connection portion 14 has multiple expansion spring 12, the inner cone sleeve 2 is arranged in cone sleeve connection portion 14, and the expansion spring 12 is covered in the outer periphery of inner cone sleeve 2, the connecting bolt 3 is connected with the bolt hole of bolt connection portion 13 and is simultaneously connected into one with inner cone sleeve 2.

[0022] Further, as Figure 1 Shown, to ensure the tension of the combination between outer sleeve and inner cone sleeve, and the inner cone sleeve can be limited in outer sleeve, the inner cone sleeve 2 includes straight body 21 and conical body 22 connected into one, the cone sleeve connection portion 14 has limiting step, the straight body 21 is arranged at the limiting step of cone sleeve connection portion 14, and is axially limited, and the expansion spring 12 is covered in the outer periphery of conical body 22 of inner cone sleeve 2.

[0023] Further, as Figure 1 Shown, to further improve structural rationality, the inner hole of cone sleeve connection portion 14 is tapered hole that is tightly fitted with conical body 22.

[0024] Further, to realize the quick connection of outer sleeve and inner cone sleeve, as Figure 1 Shown, the straight body 21 has connecting hole, the connecting bolt 3 is threadedly connected with the bolt hole of bolt connection portion 13, and the end of connecting bolt 3 is connected with the connecting hole of straight body 21. The bolt hole of bolt connection portion 13 is small-diameter thread, and the thread specification is one specification larger than connecting bolt. The advantages of this design are: first, to facilitate the installation of bolt, second, to facilitate disassembly, the bolt needs to be pushed through the thread connection.

[0025] Further, to improve the expansion elasticity of expansion spring, as Figure 2As shown, the outer periphery of the expansion sheet 12 is provided with elastic grooves 4 which reduce the structural strength and improve the expansion of the expansion sheet to the outside.

[0026] The utility model discloses a wind driven generator, and the expansion connecting assembly is used for connecting the flange of the planet carrier and the flange of the main shaft, and the flange of the planet carrier and the flange of the main shaft are connected through the expansion connecting assembly.

[0027] First, the efficiency and reliability of the wind driven generator can be improved,

[0028] Second, the expansion connecting assembly can bear higher shear force, and the expansion connecting assembly is easy to assemble and disassemble for many times, and the hydraulic system is not needed,

[0029] Third, the expansion connecting assembly is simple and fast to install, and the stress peak in the hole can be reduced when disassembling,

[0030] Fourth, the cost is relatively low, and the expansion connecting assembly is suitable for large-scale wind driven generator construction projects.

[0031] According to the above ideal embodiment of the utility model, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. An expansion joint assembly for a wind turbine, characterized by: The device comprises an outer sleeve (1), an inner tapered sleeve (2) and a connecting bolt (3), the front end of the outer sleeve (1) is provided with a plurality of expansion grooves (11) arranged along the axial direction, and the plurality of expansion grooves (11) construct the front end of the outer sleeve (1) into a plurality of expansion spring sheets (12) which can expand outward, the inner tapered sleeve (2) is arranged in the outer sleeve (1), and the outer sleeve (1) and the inner tapered sleeve (2) are connected into one body through the connecting bolt (3).

2. The expansion joint assembly for wind generators of claim 1, wherein: The outer sleeve (1) comprises a bolt connecting part (13) and a tapered sleeve connecting part (14) connected into one body, the bolt connecting part (13) is provided with a bolt hole, the tapered sleeve connecting part (14) is provided with a plurality of expansion spring sheets (12), the inner tapered sleeve (2) is arranged in the tapered sleeve connecting part (14), and the expansion spring sheets (12) are wrapped around the outer periphery of the inner tapered sleeve (2), the connecting bolt (3) is connected with the bolt hole of the bolt connecting part (13) and is screwed into one body with the inner tapered sleeve (2) at the same time.

3. The expansion joint assembly for wind generators of claim 2, wherein: The inner tapered sleeve (2) comprises a straight body (21) and a tapered body (22) connected into one body, the tapered sleeve connecting part (14) is provided with a limiting step, the straight body (21) is arranged at the limiting step of the tapered sleeve connecting part (14) and is axially limited, and the expansion spring sheets (12) are wrapped around the outer periphery of the tapered body (22) of the inner tapered sleeve (2).

4. The expansion joint assembly for wind driven electrical generators of claim 3, wherein: The inner hole of the tapered sleeve connecting part (14) is a tapered hole which is tightly matched with the tapered body (22).

5. The expansion joint assembly for wind driven electrical generators of claim 3, wherein: The straight body (21) is provided with a connecting hole, the connecting bolt (3) is threadedly connected with the bolt hole of the bolt connecting part (13), and the end of the connecting bolt (3) is connected with the connecting hole of the straight body (21).

6. The expansion joint assembly for wind driven electrical generators of claim 1, wherein: The outer periphery of the expansion spring sheet (12) is provided with an elastic groove (4) which reduces the structural strength and improves the outward expansion of the expansion spring sheet.

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