A wind turbine front end cover support mounting structure and method

Abstract

The application discloses a front end cover supporting and installing structure and method of a wind turbine, which comprises a front end cover supporting assembly, a front end cover alignment assembly, a front end cover, a main shaft and a bearing seat. The front end cover is provided with a plurality of through holes uniformly distributed along the circumference thereof and an installing hole for sleeving the main shaft. The main shaft passes through the installing hole of the front end cover. The front end cover supporting assembly has a plurality of through holes passing through the front end cover in the radial direction and forms a detachable connection with the front end cover. The bottom end of the front end cover supporting assembly is in contact with the main shaft and is provided with universal wheels for moving the front end cover. The bearing seat is sleeved on the main shaft. The flange surface of the bearing seat is provided with a plurality of threaded holes. The front end cover alignment assembly has a plurality of through holes passing through the front end cover in the radial direction and the threaded holes of the bearing seat and forms a detachable connection with the front end cover and the bearing seat. The application can support the front end cover and move the front end cover to align the holes of the front end cover and the bearing seat, lift the front end cover to make the front end cover adhere to the bearing seat, has high universality and low cost.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine generator front cover installation, and in particular to a wind turbine generator front cover support installation structure and method. Background Technology

[0002] The single-point and double-point support structures of wind turbine generators feature a front cover on the shaft system, which is installed onto the bearing housing in a vertical position on the main shaft. A sealing ring is pre-installed on the front cover. To prevent the sealing ring from being deformed by compression, the sealing ring cannot be used for load-bearing after the front cover is pre-fitted onto the main shaft. Furthermore, there is a considerable time before the front cover is installed onto the bearing housing, so it needs to be supported for a period of time. As wind turbine generators become larger, the front cover also becomes larger and heavier. Currently, the front cover of a single wind turbine generator with a capacity of 4.0MW or more weighs up to 140kg, requiring at least three adults to lift it. The front cover of even larger capacity generators is even larger and heavier, making manual lifting and installation difficult and posing safety hazards. Therefore, existing technologies incorporate tooling to assist in the support and assembly of the front cover.

[0003] Currently, there are two common types of tooling used in this field. The first type uses stacked wooden blocks to support the front cover. However, this method requires manual lifting when raising the front cover, serving only a supporting function and not an auxiliary function for lifting and assembly. The second type is a specially designed tooling. The bottom of the tooling is a base that conforms to the curvature of the large end of the spindle. A jack is placed on the base, and three of these structures are evenly distributed on the spindle flange surface. The front cover is supported on the jack. This method can solve the problem of supporting and lifting the front cover to assist in assembly, but it has three disadvantages: 1) Since the curvature of the large end of each spindle is different, this tooling can only be used for a specific model and cannot achieve the ability to be used for spindles with all curvatures; 2) When aligning the front cover with the bearing housing mounting hole, it is necessary to manually lift and rotate the front cover, which is laborious and poses a safety hazard; 3) The price of the tooling base and jacks is much higher than that of using wooden blocks directly. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and propose a front cover support and installation structure and method for wind turbine generator sets. This structure supports the front cover and allows it to be moved to align the front cover with the bearing housing. It also lifts the front cover to make it fit with the bearing housing mounting flange surface, achieving universal compatibility with most turbine models and at low cost.

[0005] The objective of this invention is achieved through the following technical solution: a front cover support and mounting structure for a wind turbine generator set, comprising a front cover support assembly, a front cover alignment assembly, a front cover, a main shaft, and a bearing housing; the front cover has multiple through holes evenly distributed along its circumference and mounting holes for fitting the main shaft, the main shaft passing through the mounting holes of the front cover; the front cover support assembly has multiple through holes radially passing through the front cover and forming a detachable connection with the front cover; the bottom end of the front cover support assembly contacts the main shaft and is provided with casters for moving the front cover; the bearing housing is fitted into the main shaft, and the flange surface of the bearing housing has multiple threaded holes; the front cover alignment assembly has multiple through holes radially passing through the front cover and the threaded holes of the bearing housing, and forming a detachable connection with the front cover and the bearing housing.

[0006] Furthermore, the front cover support assembly includes a first screw and a first nut. One end of the first screw is connected to a caster wheel. There are two first nuts respectively disposed on both sides of the front cover for clamping the front cover. The other end of the first screw is radially inserted into the two first nuts and the front cover to form a detachable connection.

[0007] Furthermore, the front cover support assembly also includes a washer disposed between the nut and the front cover.

[0008] Furthermore, the front end cover alignment assembly includes a second screw and a second nut. One end of the second screw is connected to the threaded hole of the bearing seat, and the other end of the second screw passes through the mounting hole of the front end cover and forms a threaded connection with the two second nuts.

[0009] Furthermore, the caster wheel is a rubber caster wheel.

[0010] A method for supporting and installing a front cover of a wind turbine generator set, based on the aforementioned support and installation structure for the front cover of a wind turbine generator set, includes the following steps:

[0011] S1. The crane lifts the front cover and puts it onto the main shaft. After lowering it to the preset height, the bottom end of the first screw of the front cover support assembly is facing down and equipped with a caster wheel. Then, a first nut and a washer are inserted from the top of the first screw. The first screw is then inserted into the three through holes of the front cover. The length of the three first screws extending out of the front cover is adjusted to be the same. Then, a washer and a first nut are inserted into each screw. The first nuts on both sides of the front cover are tightened. The front cover is then slowly lowered until the caster wheels of the three first screws are supported on the main shaft.

[0012] S2. When the front cover needs to be installed on the bearing housing, insert the second screw of the front cover alignment assembly into the other three through holes of the front cover from bottom to top. Use the caster wheel to move the front cover and align the through hole of the front cover with the threaded hole of the bearing housing flange mounting surface. Then screw the second screw into the threaded hole of the bearing housing. Then screw the two second nuts into the second screw until they press against the front cover. Finally, tighten the second nuts.

[0013] S3. Remove the first nut and first washer from the first screw on the front end cover. Use an open-end wrench to hold the second nut located below. Then use an open-end wrench to rotate the second nut located above, so that the front end cover is lifted along the second screw until the front end cover is in contact with the bearing housing mounting surface. Tighten the second nut.

[0014] S4. Use the fasteners provided with the main unit to fix the front cover to the bearing seat, loosen the second nut that is close to the front cover, then remove the second screw from the bearing seat, and then install the fasteners provided with the main unit on the empty threaded hole to complete the support and installation of the front cover.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] 1. The wind turbine generator front cover support and installation structure of the present invention uses a combination of casters and screws, which is not limited by the size and curvature of the main shaft. At the same time, the casters are made of rubber, which will not damage the paint on the surface of the main shaft.

[0017] 2. When aligning the front cover with the threaded hole of the bearing housing, the caster does not require manual effort to lift the front cover; simply rotate the front cover.

[0018] 3. Uses washers to accommodate various sizes of front cover mounting holes, preventing nuts from falling into the front cover mounting holes.

[0019] 4. The second screw is inserted into the bearing housing to guide the front cover.

[0020] 5. Tighten the nut upwards to lift the front cover more easily.

[0021] 6. It is compatible with multiple sizes and does not require the front cover to be lifted for the holes, resulting in lower costs. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the front cover support assembly.

[0023] Figure 2 This is a schematic diagram of the installation structure of the front cover support assembly and the front cover.

[0024] Figure 3 for Figure 2 A magnified view of a portion at point A.

[0025] Figure 4 This is a schematic diagram of the support and installation structure for the front cover of a wind turbine generator set.

[0026] Figure 5 This is a schematic diagram of the installation structure of the front cover alignment assembly, the front cover, and the bearing housing.

[0027] Figure 6 A schematic diagram showing the removal of the first nut and washer from the top of the front cover support assembly.

[0028] Figure 7 This is a schematic diagram of the front cover mounted on the bearing housing.

[0029] Figure 8 for Figure 7 A magnified view of a portion of point B.

[0030] Figure 9 for Figure 7 A magnified view of a portion of point C. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] Example 1

[0033] See Figures 1 to 5 As shown, the wind turbine generator front cover support and installation structure provided in this embodiment includes a front cover support assembly 1, a front cover alignment assembly 2, a front cover 3, a main shaft 4, and a bearing seat 5.

[0034] The front cover 3 has multiple through holes evenly distributed along its circumference and mounting holes for fitting the main shaft 4. The main shaft 4 passes through the mounting holes of the front cover. The front cover support assembly 1 has multiple through holes radially passing through the front cover 3 and forms a detachable connection with the front cover 3. The bottom end of the front cover support assembly 1 contacts the main shaft 4 and is provided with rubber casters 6 for moving the front cover 3. The bearing seat 5 is fitted into the main shaft 4, and the flange surface of the bearing seat 5 has multiple threaded holes. The front cover alignment assembly 2 has multiple through holes radially passing through the front cover 3 and the threaded holes of the bearing seat 5 and forms a detachable connection with the front cover 3 and the bearing seat 5.

[0035] The front cover support assembly 1 includes a washer 101, a first screw 102, and a first nut 103. One end of the first screw 102 is connected to a rubber caster 6. Two first nuts 103 are respectively disposed on both sides of the front cover 3 for clamping the front cover 3. The other end of the first screw 102 is radially inserted into the two first nuts 103 and the front cover 3 to form a detachable connection. The washer 101 is disposed between the first nut 103 and the front cover 3, and the diameter of the washer 101 is larger than the diameter of the first nut 103 to prevent friction between the first nut and the front cover 3 and to avoid damage to the sealing ring 301 built into the front cover 3.

[0036] The front end cover alignment assembly 2 includes a second screw 201 and a second nut 202. One end of the second screw 201 is connected to the threaded hole of the bearing seat 5, and the other end of the second screw 201 passes through the mounting hole of the front end cover 3 and forms a threaded connection with the two second nuts 202.

[0037] Example 2

[0038] See Figures 6 to 9 As shown, the wind turbine generator front cover support installation method provided in this embodiment is based on the wind turbine generator front cover support installation structure described in Embodiment 1, and includes the following steps:

[0039] S1. The crane lifts the front cover 3 and puts it onto the main shaft 4. After lowering it to the preset height, the bottom end of the first screw 102 of the front cover support assembly 1 is facing down and equipped with a universal wheel 6. Then, a first nut 103 and a washer 101 are inserted from the top of the first screw 102 respectively. Then, the three first screws 102 are inserted into the three through holes of the front cover 3 respectively. The length of the three first screws 102 extending out of the front cover 3 is adjusted to be the same. Then, a washer 101 and a first nut 103 are inserted respectively. The first nuts 103 on both sides of the front cover 3 are tightened. Then, the front cover 3 is slowly lowered until the universal wheel 6 at the bottom of the three first screws 102 is supported on the main shaft 4.

[0040] S2. When the front cover 3 needs to be installed on the bearing housing 5, insert the second screw 201 of the front cover alignment assembly 2 into the other three through holes of the front cover 3 from bottom to top. Use the caster wheel 6 to move the front cover 3 and align the through hole of the front cover 3 with the threaded hole of the flange mounting surface of the bearing housing 5. Then screw the second screw 201 into the threaded hole of the bearing housing 5. Then screw the two second nuts 202 into the second screw 201 until they press against the front cover 3. Then tighten the second nuts 202 to fix the height of the front cover 3.

[0041] S3. Remove the first nut 103 and the first washer 101 from the first screw 102 above the front cover 3. Use an open-end wrench to hold the second nut 202 located below. Then use an open-end wrench to rotate the second nut 202 located above, so that the front cover 3 is lifted along the second screw 201 until the front cover 3 is in contact with the mounting surface of the bearing seat 5. Tighten the second nut 202 located above.

[0042] S4. Use the pre-set fasteners 7 of the wind turbine generator set to fix the front cover 3 onto the bearing seat 5. Loosen the second nut 202 that is close to the front cover 3, then remove the second screw 201 from the bearing seat 5. Then install the pre-set fasteners 7 of the wind turbine generator set on the threaded hole in the bearing seat 5 to complete the support and installation of the front cover 3.

[0043] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A front end cover support and installation structure for a wind turbine generator set, characterized in that: The device includes a front cover support assembly, a front cover alignment assembly, a front cover, a main shaft, and a bearing housing. The front cover has multiple through holes evenly distributed along its circumference and mounting holes for fitting the main shaft. The main shaft passes through the mounting holes of the front cover. There are multiple front cover support assemblies, each of which vertically passes through the through holes of the front cover and forms a detachable connection with the front cover. The bottom end of each front cover support assembly contacts the main shaft and is provided with casters for moving the front cover. The bearing housing is fitted into the main shaft, and the flange surface of the bearing housing has multiple threaded holes. There are multiple front cover alignment assemblies, each of which vertically passes through the through holes of the front cover and the threaded holes of the bearing housing and forms a detachable connection with the front cover and the bearing housing.

2. The wind turbine generator front end cover support and installation structure according to claim 1, characterized in that: The front cover support assembly includes a first screw and a first nut. One end of the first screw is connected to a caster wheel. There are two first nuts, which are respectively disposed on both sides of the front cover for clamping the front cover. The other end of the first screw is vertically inserted into the two first nuts and the front cover to form a detachable connection.

3. The wind turbine generator front end cover support and installation structure according to claim 2, characterized in that: The front cover support assembly also includes a washer disposed between the first nut and the front cover.

4. The wind turbine generator front end cover support and installation structure according to claim 1, characterized in that: The front end cover alignment assembly includes a second screw and a second nut. One end of the second screw is connected to the threaded hole of the bearing seat, and the other end of the second screw passes through the through hole of the front end cover and forms a threaded connection with two second nuts.

5. The wind turbine generator front end cover support and installation structure according to claim 1, characterized in that: The casters are rubber casters.

6. A method for supporting and installing the front cover of a wind turbine generator set, characterized in that, Based on the wind turbine generator front end cover support and installation structure according to any one of claims 1-5, the following steps are included: S1. The crane lifts the front cover and puts it onto the main shaft. After lowering it to the preset height, the bottom end of the first screw of the front cover support assembly is facing down and equipped with a caster wheel. Then, a first nut and a washer are inserted from the top of the first screw. The three first screws are then inserted into the three through holes of the front cover respectively. The length of the three first screws extending out of the front cover is adjusted to be the same. Then, a washer and a first nut are inserted into each screw. The first nuts on both sides of the front cover are tightened. The front cover is then slowly lowered until the caster wheel at the bottom of the three first screws supports the main shaft. S2. When the front cover needs to be installed on the bearing housing, insert the second screw of the front cover alignment assembly into the other three through holes of the front cover from bottom to top. Use the caster to move the front cover and align the through holes of the front cover with the threaded holes of the bearing housing flange mounting surface. Then screw the second screw into the threaded holes of the bearing housing. Then screw the two second nuts into the second screw until they press against the front cover. Finally, tighten the second nuts to fix the height of the front cover. S3. Remove the first nut and first washer from the first screw on the front end cover. Use an open-end wrench to hold the second nut located below. Then use an open-end wrench to rotate the second nut located above, so that the front end cover is lifted along the second screw until the front end cover is in contact with the bearing housing mounting surface. Tighten the second nut. S4. Use the pre-installed fasteners of the wind turbine generator set to fix the front cover to the bearing housing. Loosen the second nut that is close to the front cover, then remove the second screw from the bearing housing. Then install the pre-installed fasteners of the wind turbine generator set on the threaded hole in the bearing housing to complete the support and installation of the front cover.

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