Front end cover supporting and mounting structure and method for wind generating set

Abstract

The invention discloses a front end cover supporting and mounting structure and method for a wind generating set. The structure comprises a front end cover supporting assembly, a front end cover aligning assembly, a front end cover, a main shaft and a bearing seat. The front end cover is provided with a plurality of through holes evenly distributed in the circumferential direction of the front end cover and a mounting hole used for being sleeved with the main shaft, the main shaft penetrates through the mounting hole of the front end cover, the front end cover supporting assembly is provided with a plurality of through holes penetrating through the front end cover in the radial direction and is detachably connected with the front end cover, and the bottom end of the front end cover supporting assembly makes contact with the main shaft. Universal wheels for moving the front end cover are arranged; the bearing seat is sleeved with the main shaft, a plurality of threaded holes are formed in the flange face of the bearing seat, and the front end cover alignment assembly is provided with a plurality of through holes penetrating through the front end cover and the threaded holes of the bearing seat in the radial direction and is detachably connected with the front end cover and the bearing seat; the front end cover can be supported, the front end cover can be moved to achieve hole alignment of the front end cover and the bearing seat, the front end cover is lifted to be attached to the bearing seat, universality is high, and cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of installation of a front end cover of a wind generator set, and in particular to a supporting and installing structure and method of a front end cover of a wind generator set. Background Art

[0002] A front end cover is provided on the shaft system of the single-point and double-point support structure of the wind turbine generator set, which is installed on the bearing seat when the main shaft is in a vertical state. A sealing ring is pre-installed on the front end cover. In order to prevent the sealing ring from being squeezed and deformed, after the front end cover is pre-inserted into the main shaft, the sealing ring cannot be used to support the load, and there is still a relatively long time before the front end cover is installed on the bearing seat, so the front end cover needs to be supported for a period of time. As wind turbines become larger and larger, the front end cover is also getting larger and heavier. At present, the weight of the front end cover of a single wind turbine generator set above 4.0MW has reached 140kg, and it requires at least 3 adults to lift it. The front end cover of a larger capacity unit is larger and heavier, and it is difficult to lift and install manually and there are safety hazards. Therefore, in the prior art, tooling is designed to assist in the support and assembly of the front end cover.

[0003] There are currently two types of tooling commonly used in this field. The first is to use stacked wooden blocks to support the front end cover, but this method requires manual lifting when lifting the front end cover, which only plays a supporting role and does not play a role in lifting and assisting assembly. The second is to design a special tooling. The bottom of the tooling is a base that conforms to the curvature of the main shaft big end bell mouth. A jack is placed on the base. Three of these structures are evenly distributed on the main shaft flange surface, and the front end cover is supported on the jack. This method can solve the problem of supporting and lifting the front end cover to assist assembly, but there are three disadvantages: 1) Since the curvature of the big end bell mouth of each spindle is inconsistent, this tooling can only be used for a specific model and cannot meet the requirements of all curvature spindles; 2) When the front end cover is aligned with the bearing seat mounting hole, it is necessary to lift the front end cover manually to rotate, which is laborious and has safety hazards; 3) The price of the tooling base and jack is much more expensive than the cost of using wooden blocks directly. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a front end cover support and installation structure and method for a wind turbine generator set, which supports the front end cover and can move the front end cover to achieve the alignment of the front end cover and the bearing seat holes, and can also lift the front end cover to make the front end cover and the bearing seat mounting flange surface fit together, thereby achieving the purpose of being universal for most models and at low cost.

[0005] The objective of the present invention is achieved through the following technical solutions: a front end cover support and installation structure of a wind turbine generator set, comprising a front end cover support 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 evenly distributed along its circumference and a mounting hole for inserting the main shaft, the main shaft passes through the mounting hole of the front end cover, the front end cover support assembly has a plurality of through holes radially passing through the front end cover, and forms a detachable connection with the front end cover, the bottom end of the front end cover support assembly touches the main shaft, and is provided with a universal wheel for moving the front end cover; the bearing seat is inserted into the main shaft, and 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 radially passing through the front end cover and the threaded holes of the bearing seat, and forms a detachable connection with the front end cover and the bearing seat.

[0006] Furthermore, the front end cover support assembly includes a first screw and a first nut, one end of the first screw is connected to the universal wheel, two first nuts are respectively arranged on both sides of the front end cover for clamping the front end cover, and the other end of the first screw radially penetrates into the two first nuts and the front end cover to form a detachable connection.

[0007] Furthermore, the front end cover support assembly also includes a washer, and the washer is arranged between the nut and the front end 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 to form a threaded connection with two second nuts.

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

[0010] A method for supporting and installing a front cover of a wind turbine generator set is implemented based on the above-mentioned front cover supporting and installing structure of the wind turbine generator set, and comprises the following steps: S1. Hoist the front end cover onto the main shaft with a crane. After it drops to a preset height, place the bottom end of the first screw of the front end cover support assembly downward and equip it with a universal wheel. Then, insert a first nut and a washer from the top of the first screw respectively, and then insert the first screw into the three through holes of the front end cover respectively. Adjust the lengths of the three first screws extending out of the front end cover to be the same. Then, insert a washer and a first nut respectively, tighten the first nuts on both sides of the front end cover, and then slowly drop the front end cover until the universal wheels of the three first screws are supported on the main shaft.

[0011] S2. When the front end cover needs to be installed on the bearing seat, insert the second screw of the front end cover alignment assembly into the other three through holes of the front end cover from bottom to top, move the front end cover using the universal wheel, align the through holes of the front end cover with the threaded holes on the flange mounting surface of the bearing seat, then screw the second screw into the threaded hole of the bearing seat, and then screw the two second nuts into the second screw until they support the front end cover, and then tighten the second nuts.

[0012] S3. Remove the first nut and the first washer above the front end cover from the first screw, clamp the second nut located below with an open-end wrench, and then use the open-end wrench to rotate the second nut located above to lift the front end cover along the second screw until the front end cover fits with the bearing seat mounting surface, and tighten the second nut.

[0013] S4. Use the fasteners provided by the host to fix the front cover to the bearing seat, loosen the second nut close to the front cover, then withdraw the second screw from the bearing seat, and then install the fasteners provided by the host on the vacated threaded holes to complete the support and installation of the front cover.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The wind turbine generator front cover support and installation structure of the present invention uses a universal wheel and a screw rod, which is not limited by the size and curvature of the main shaft. At the same time, the universal wheel is made of rubber and will not damage the paint on the surface of the main shaft.

[0015] 2. When the universal wheel is aligned with the threaded hole of the front cover and the bearing seat, there is no need to lift the front cover with human effort, just turn the front cover.

[0016] 3. Use washers to adapt to various sizes of front cover mounting holes to prevent the nut from falling into the mounting hole of the front cover.

[0017] 4. The second screw is inserted into the bearing seat to guide the front cover.

[0018] 5. Turn the nut upward to lift the front cover with less effort.

[0019] 6. It is compatible with various sizes and does not require people to lift the front cover for holes, which is lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the front end cover support assembly.

[0021] Figure 2 It is a schematic diagram of the installation structure of the front end cover support assembly and the front end cover.

[0022] Figure 3 for Figure 2 A partial enlarged view of point A.

[0023] Figure 4 This is a schematic diagram of the support and installation structure of the front cover of a wind turbine generator set.

[0024] Figure 5 It is a schematic diagram of the installation structure of the front end cover alignment assembly, the front end cover and the bearing seat.

[0025] Figure 6 Schematic diagram of the front cover support assembly with the upper first nut and washer removed.

[0026] Figure 7 It is a structural schematic diagram of the front end cover installed on the bearing seat.

[0027] Figure 8 for Figure 7 A partial enlarged view of point B.

[0028] Fig. 9 for Figure 7 A partial enlarged view of point C. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments.

[0030] Example 1 See also Figures 1 to 5 As shown, the front cover support and installation structure of the wind turbine generator set provided in this embodiment includes a front cover support component 1, a front cover alignment component 2, a front cover 3, a main shaft 4 and a bearing seat 5.

[0031] The front end cover 3 is provided with a plurality of through holes evenly distributed along its circumference and a mounting hole for inserting the main shaft 4. The main shaft 4 passes through the mounting hole of the front end cover. The front end cover support assembly 1 has a plurality of through holes radially passing through the front end cover 3 and forming a detachable connection with the front end cover 3. The bottom end of the front end cover support assembly 1 is in contact with the main shaft 4 and is provided with a rubber universal wheel 6 for moving the front end cover 3; the bearing seat 5 is inserted into the main shaft 4, and the flange surface of the bearing seat 5 is provided with a plurality of threaded holes. The front end cover alignment assembly 2 has a plurality of through holes radially passing through the front end cover 3 and the threaded holes of the bearing seat 5, and forming a detachable connection with the front end cover 3 and the bearing seat 5.

[0032] Among them, the front end cover support assembly 1 includes a gasket 101, a first screw 102 and a first nut 103. One end of the first screw 102 is connected to the rubber universal wheel 6. The first nut 103 has two respectively arranged on both sides of the front end cover 3 for clamping the front end cover 3. The other end of the first screw 102 radially penetrates into the two first nuts 103 and the front end cover 3 to form a detachable connection. The gasket 101 is arranged between the first nut 103 and the front end cover 3, and the diameter of the gasket 101 is larger than the diameter of the first nut 103, so as to prevent the friction between the first nut and the front end cover 3 and avoid damage to the built-in sealing ring 301 of the front end cover 3.

[0033] 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 .

[0034] Example 2 See also Figures 6 to 9 As shown, the wind turbine generator set front end cover support installation method provided in this embodiment is implemented based on the wind turbine generator set front end cover support installation structure described in Example 1, and includes the following steps: S1. The front end cover 3 is hoisted by a crane and inserted into the main shaft 4. After it falls to a preset height, the bottom end of the first screw 102 of the front end cover support assembly 1 is facing downward and equipped with a universal wheel 6. Then, a first nut 103 and a washer 101 are respectively inserted from the top of the first screw 102, and then the three first screws 102 are respectively inserted into the three through holes of the front end cover 3. The three first screws 102 are adjusted to have the same length at one end extending out of the front end cover 3. Then, a washer 101 and a first nut 103 are respectively inserted, and the first nuts 103 on both sides of the front end cover 3 are tightened. Then, the front end cover 3 is slowly lowered until the universal wheels 6 at the bottom ends of the three first screws 102 are supported on the main shaft 4.

[0035] S2. When the front end cover 3 needs to be installed on the bearing seat 5, the second screw 201 of the front end cover alignment assembly 2 is respectively inserted into the other three through holes of the front end cover 3 from bottom to top, and the front end cover 3 is moved by the universal wheel 6 to align the through holes of the front end cover 3 with the threaded holes of the flange mounting surface of the bearing seat 5, and then the second screw 201 is screwed into the threaded holes of the bearing seat 5, and then the two second nuts 202 are respectively screwed into the second screw 201 until they support the front end cover 3, and then the second nuts 202 are tightened to fix the height of the front end cover 3.

[0036] S3. Remove the first nut 103 and the first washer 101 above the front end cover 3 from the first screw 102, clamp the second nut 202 located below with an open-end wrench, and then use the open-end wrench to rotate the second nut 202 located above to lift the front end cover 3 along the second screw 201 until the front end cover 3 is in contact with the mounting surface of the bearing seat 5, and tighten the second nut 202 located above.

[0037] S4. Use the preset fasteners 7 of the wind turbine generator set to fix the front cover 3 on the bearing seat 5, loosen the second nut 202 that is close to the front cover 3, then withdraw the second screw 201 from the bearing seat 5, and then install the preset fasteners 7 of the wind turbine generator set on the vacant threaded holes of the bearing seat 5 to complete the support and installation of the front cover 3.

[0038] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine generator front cover support and installation structure, characterized in that: It includes a front end cover support 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 evenly distributed along its circumference and a mounting hole for inserting the main shaft, the main shaft passes through the mounting hole of the front end cover, the front end cover support assembly has a plurality of through holes radially passing through the front end cover, and forms a detachable connection with the front end cover, the bottom end of the front end cover support assembly touches the main shaft, and is provided with a universal wheel for moving the front end cover; the bearing seat is inserted into the main shaft, and 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 radially passing through the front end cover and the threaded holes of the bearing seat, and forms a detachable connection with the front end cover and the bearing seat.

2. A wind turbine generator front cover support and installation structure according to claim 1, characterized in that: The front end cover support assembly includes a first screw and a first nut. One end of the first screw is connected to the universal wheel. Two first nuts are respectively arranged on both sides of the front end cover for clamping the front end cover. The other end of the first screw radially penetrates the two first nuts and the front end cover to form a detachable connection.

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

4. A wind turbine generator front 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 mounting hole of the front end cover to form a threaded connection with two second nuts.

5. The wind turbine generator set front cover support and installation structure according to claim 1, characterized in that: The universal wheel is a rubber universal wheel.

6. A method for supporting and installing a front cover of a wind turbine generator set, characterized in that: The wind turbine generator set front cover support and installation structure according to any one of claims 1 to 5 is implemented, comprising the following steps: S1. The front end cover is hoisted by the crane and inserted into the main shaft. After it drops to the preset height, the bottom end of the first screw of the front end cover support assembly is facing downward and equipped with a universal wheel. Then, a first nut and a washer are respectively inserted from the top of the first screw. Then, the three first screws are respectively inserted into the three through holes of the front end cover. The lengths of the ends of the three first screws extending out of the front end cover are adjusted to be the same. Then, a washer and a first nut are respectively inserted. The first nuts on both sides of the front end cover are tightened, and then the front end cover is slowly lowered until the universal wheels at the bottom ends of the three first screws are supported on the main shaft. S2. When the front end cover needs to be installed on the bearing seat, insert the second screw of the front end cover alignment assembly into the other three through holes of the front end cover from bottom to top, move the front end cover using the universal wheel, align the through holes of the front end cover with the threaded holes of the flange mounting surface of the bearing seat, and then screw the second screw into the threaded hole of the bearing seat, and then screw the two second nuts into the second screw until they support the front end cover, and then tighten the second nuts to fix the height of the front end cover; S3, remove the first nut and the first washer above the front end cover from the first screw, clamp the second nut located below with an open-end wrench, and then use the open-end wrench to rotate the second nut located above to lift the front end cover along the second screw until the front end cover fits with the mounting surface of the bearing seat, and tighten the second nut; S4. Use the preset fasteners of the wind turbine generator set to fix the front cover on the bearing seat, loosen the second nut close to the front cover, then withdraw the second screw from the bearing seat, and then install the preset fasteners of the wind turbine generator set on the vacant threaded holes of the bearing seat to complete the support and installation of the front cover.

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