Expansion bolt assembly for wind driven generator

Abstract

The utility model relates to an expansion bolt assembly for a wind driven generator, which is characterized by comprising an expansion sleeve, a first inner taper sleeve, a second inner taper sleeve and a connecting bolt, the expansion grooves are formed in the two ends of the expansion sleeve respectively to form expansion pieces capable of expanding towards the outer side, the first inner taper sleeve and the second inner taper sleeve are oppositely arranged in an inner hole of the expansion sleeve, and the connecting bolt is inserted into an inner hole of the first inner taper sleeve, penetrates out of the inner hole and is detachably connected with the expansion sleeve and the second inner taper sleeve at the same time. 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 bolt combination, concretely relates to an expansion bolt combination for wind driven generator. BACKGROUND

[0002] At present, a plurality of 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 bolts for the flange connection in the prior art are affected by the centering degree during the installation of the flanges, the flange holes on the two sides cannot be prepared to be aligned, which easily leads to the difficulty in the bolt installation, and in serious cases, the bolts are loose or fail, thereby affecting the stability and safety of the wind driven generator, and since the forces between each bolt are uneven during the installation of the bolts, the bolts cannot bear higher shearing forces, are not easy to be assembled and disassembled for many times, and need to be assisted by a hydraulic system to be smoothly disassembled, so that the installation and maintenance cost is high. SUMMARY

[0003] The utility model discloses a kind of expansion bolt combinations for wind driven generator, which is characterized by: including expansion sleeve, first inner cone sleeve, second inner cone sleeve and connecting bolt,

[0004] To achieve the above object, the technical scheme of the utility model is: an expansion bolt combination for wind driven generator, which is characterized by: including expansion sleeve, first inner cone sleeve, second inner cone sleeve and connecting bolt,

[0005] The two ends of the expansion sleeve are arranged with a plurality of expansion grooves in the axial direction, and the plurality of expansion grooves respectively construct expansion sheets that can expand outward at the two ends of the expansion sleeve,

[0006] The first inner cone sleeve and the second inner cone sleeve are arranged in the inner hole of the expansion sleeve, and the connecting bolt is inserted into the inner hole of the first inner cone sleeve and penetrates out while being detachably connected with the expansion sleeve and the second inner cone sleeve.

[0007] In the above technical scheme, the expansion sleeve includes first outer sleeve and second outer sleeve that are connected as a whole and coaxially arranged, the first outer sleeve and the second outer sleeve are both provided with expansion sheets, the first inner cone sleeve is arranged inside the first outer sleeve, and the second inner cone sleeve is arranged inside the second outer sleeve.

[0008] In the above technical solution, the inner hole of the first outer sleeve is a tapered step hole that is tightly fitted with the first inner cone sleeve and is used to axially limit the first inner cone sleeve, and the first outer sleeve is provided with a threaded hole, and the connecting bolt is inserted into the first inner cone sleeve and is threadedly connected with the first outer sleeve and the second inner cone sleeve.

[0009] In the above technical solution, the inner hole of the second outer sleeve is a tapered hole that is tightly fitted with the second inner cone sleeve.

[0010] In the above technical solution, the outer periphery of the expansion sleeve and close to the end of the connecting bolt are provided with elastic grooves that improve the expansion of the expansion pieces.

[0011] The utility model has the following positive effects: after the expansion bolt assembly of the utility model is used, because the utility model comprises an expansion sleeve, a first inner cone sleeve, a second inner cone sleeve and a connecting bolt,

[0012] The two ends of the expansion sleeve are arranged with a plurality of expansion grooves in the axial direction, and the plurality of expansion grooves respectively construct the expansion pieces that can expand outward at the two ends of the expansion sleeve,

[0013] The first inner cone sleeve and the second inner cone sleeve are oppositely arranged in the inner hole of the expansion sleeve, the connecting bolt is inserted into the inner hole of the first inner cone sleeve and is connected with the expansion sleeve and the second inner cone sleeve,

[0014] When the utility model is used in a wind driven generator, taking the connection between the planet carrier flange and the main shaft flange as an example, the plurality of expansion bolt assemblies are sequentially put into the planet carrier flange hole, the main shaft flange hole is aligned with the expansion connection assembly and is installed and attached to the planet carrier flange, and finally the connecting bolts are sequentially tightened, when the connecting bolts are tightened, the tail of the connecting bolt expands outward, friction and locking are generated, so that the fixation between the two flanges is realized, the installation is simple and fast, the two flanges to be connected are not centered, the position error between the connection holes is eliminated through the assembly, the load is evenly distributed, and the disassembly and installation are very convenient.

[0015] First, the efficiency and reliability of the wind driven generator can be improved,

[0016] Second, higher shear force can be borne, and the assembly and disassembly can be easily repeated without using a hydraulic system,

[0017] Third, the installation is simple and fast, and the stress peak in the hole can be reduced during disassembly,

[0018] Fourth, the cost is relatively low, and the utility model is suitable for large-scale wind driven generator construction projects. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a specific embodiment of the utility model;

[0020] Figure 2 is a perspective view of the utility model. Specific embodiment

[0021] The utility model is further explained below in combination with the drawings and the embodiments given, but is not limited to this.

[0022] As Figure 1 , 2 shown, a kind of expansion bolt combination for wind driven generator, including expansion sleeve 1, first inner cone sleeve 2, second inner cone sleeve 3 and connecting bolt 4,

[0023] The both ends of the expansion sleeve 1 are misaligned with multiple expansion grooves 11 along its axial direction, and multiple expansion grooves 11 respectively construct the expansion sheet 12 that can expand to the outside of the both ends of the expansion sleeve 1,

[0024] The first inner cone sleeve 2 and the second inner cone sleeve 3 are oppositely arranged in the inner hole of the expansion sleeve 1, and the connecting bolt 4 is inserted into the inner hole of the first inner cone sleeve 2 and passes out while being detachably connected with the expansion sleeve 1 and the second inner cone sleeve 3.

[0025] Further, as Figure 1 Shown, to ensure that the two flanges connected are not centered, eliminate the positional error between each connecting hole, so that load is more evenly distributed, and further improve the convenience of installation, the expansion sleeve 1 includes first outer sleeve 13 and second outer sleeve 14 that are integrated and coaxially arranged, the first outer sleeve 13 and the second outer sleeve 14 are both provided with expansion sheet 12, the first inner cone sleeve 2 is arranged inside the first outer sleeve 13, and the second inner cone sleeve 3 is arranged inside the second outer sleeve 14.

[0026] Further, as Figure 1 Shown, to form a tight fit between the first inner cone sleeve and the first outer sleeve, relative looseness is not easy to occur between the two, and the first inner cone sleeve is axially limited, the inner hole of the first outer sleeve 13 is a tapered step hole that forms a tight fit with the first inner cone sleeve 2, and is used to axially limit the first inner cone sleeve 2, the first outer sleeve 13 is provided with a threaded hole, and the connecting bolt 4 is inserted into the first inner cone sleeve 2 and is simultaneously threadedly connected with the first outer sleeve 13 and the second inner cone sleeve 3.

[0027] Further, as Figure 1 Shown, to form a tight fit between the second inner cone sleeve and the second outer sleeve, the inner hole of the second outer sleeve 14 is a tapered hole that forms a tight fit with the second inner cone sleeve 3.

[0028] Further, as Figure 2As shown, in order to ensure the expansion effect, the outer periphery of the expansion sleeve 1 is provided with an elastic groove 15 for improving the expansion of the expansion sheet 12.

[0029] 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 expansion connecting assembly comprises a sleeve, an expansion sheet and a connecting bolt.

[0030] First, the efficiency and reliability of the wind driven generator can be improved,

[0031] Second, the expansion connecting assembly can bear higher shear force, and is easy to assemble and disassemble for multiple times without using a hydraulic system,

[0032] Third, the expansion connecting assembly is simple and convenient to install and disassemble, and the stress peak in the hole can be reduced when disassembling,

[0033] Fourth, the expansion connecting assembly has relatively low cost and is suitable for large-scale wind driven generator construction projects.

[0034] Based on 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 bolt assembly for a wind turbine, characterized in that: It comprises an expansion sleeve (1), a first inner cone sleeve (2), a second inner cone sleeve (3) and connecting bolts (4). A plurality of expansion slots (11) are staggeredly arranged at both ends of the expansion sleeve (1) along its axial direction, and the plurality of expansion slots (11) respectively form expansion pieces (12) at both ends of the expansion sleeve (1) that can expand outward. The first inner cone sleeve (2) and the second inner cone sleeve (3) are arranged relative to each other in the inner hole of the expansion sleeve (1); the connecting bolt (4) is inserted into the inner hole of the first inner cone sleeve (2) and passes through it to be detachably connected to the expansion sleeve (1) and the second inner cone sleeve (3).

2. The expansion bolt assembly for a wind turbine according to claim 1, characterized in that: The expansion sleeve (1) comprises a first outer sleeve (13) and a second outer sleeve (14) which are connected as one body and arranged coaxially. The first outer sleeve (13) and the second outer sleeve (14) are both provided with expansion plates (12). The first inner cone sleeve (2) is provided inside the first outer sleeve (13), and the second inner cone sleeve (3) is provided inside the second outer sleeve (14).

3. The expansion bolt assembly for a wind turbine according to claim 2, characterized in that: The inner hole of the first outer sleeve (13) is a tapered stepped hole that forms a tight fit with the first inner conical sleeve (2) and is used to limit the axial position of the first inner conical sleeve (2). The first outer sleeve (13) is provided with a threaded hole. The connecting bolt (4) is inserted into the first inner conical sleeve (2) and is simultaneously threadedly connected to the first outer sleeve (13) and the second inner conical sleeve (3).

4. The expansion bolt assembly for a wind turbine according to claim 2, wherein: The inner hole of the second outer sleeve (14) is a tapered hole that forms a tight fit with the second inner tapered sleeve (3).

5. The expansion bolt assembly for a wind turbine according to claim 1, wherein: An elastic groove (15) for increasing the expansion of the expansion piece (12) is provided on the outer periphery of the expansion sleeve (1) and close to the end of the connecting bolt (4).

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