Variable-pitch bearing and hub connecting hole dislocation adjusting tool for wind generating set

Abstract

The utility model relates to the field of wind power generation equipment, in particular to a wind generating set variable-pitch bearing and hub connecting hole dislocation adjusting tool which comprises a hub and a variable-pitch bearing, a plurality of first bolt holes are formed in an outer ring and an inner ring of the variable-pitch bearing in a circular array mode, and a plurality of second bolt holes are formed in the end of the hub in a circular array mode. The hub end is fixedly connected with the outer ring of the variable pitch bearing through a plurality of first connecting bolts arranged in a circular array, and the first connecting bolts penetrate through the corresponding first bolt holes and second bolt holes, and the hub end and the outer ring of the variable pitch bearing have the advantages that in the installation process of the hub end and the outer ring of the variable pitch bearing, pulling force is generated by tightening the first connecting bolts, and the outer ring of the variable pitch bearing is fixed through the first connecting bolts. The pull force acts on the geometry with the conical surface, and then the conical surface is utilized to extrude the hole wall of the variable pitch bearing to generate relative displacement for dislocation adjustment, so that the structure is simpler, the cost is greatly reduced, the mounting operation is convenient, the practicability is better, and the method is suitable for popularization.

Description

Technical Field

[0001] The utility model relates to the field of wind power generation equipment, in particular to a tool for adjusting the misalignment of a variable pitch bearing and a hub connection hole of a wind power generator set. Background Art

[0002] The wind turbine pitch system consists of three main components: pitch bearing, pitch drive device - pitch motor and pitch gearbox, and pitch control cabinet. If one drive device fails, the other two drives can safely shut down the wind turbine. The pitch mechanism is usually a pitch bearing installed on the hub, tightened by outer ring bolts, and its inner ring gear meshes with the pitch drive device and is connected to the blades.

[0003] During the operation of wind turbines, it was found that a small number of units had broken bolts connecting the pitch bearing and the hub. When observing the broken wires in the bolt holes, it was found that the broken wires and the bolt holes were not concentric, that is, there was a problem of misalignment between the pitch bearing and the hub connecting holes. The broken wires interfered severely with the connecting holes, making it impossible to remove the broken wires.

[0004] After searching, a method for correcting the misalignment of bolt holes in blades of a wind turbine generator set with announcement number CN114810499A includes: removing the bolts in some of the misaligned bolt holes of the misaligned blades, and installing hydraulic guide pins in the misaligned bolt holes; driving the impeller to rotate and adjusting the angle of the misaligned blades; causing the misaligned blade flange and the hub pitch bearing flange to produce circumferential or radial displacement under the action of external force or deadweight, and correcting the misaligned bolt holes under the continuous pressure-maintaining action of the hydraulic guide pins; removing the hydraulic guide pins, installing the removed bolts, and tightening all nuts.

[0005] Although the above-mentioned invention patent application document can shorten the downtime correction time, reduce the correction cost, and avoid the use of large lifting equipment during maintenance, it still requires a certain cost through structures such as hydraulic guide pins, cylinders, and high-pressure oil pipes, and is inconvenient to install, and further improvement is needed.

[0006] Therefore, it is necessary to invent a tool for adjusting the misalignment between the variable pitch bearing and the hub connection hole of a wind turbine generator set. Utility Model Content

[0007] To this end, the utility model provides a wind turbine generator set variable pitch bearing and hub connection hole misalignment adjustment tool to solve the problems raised in the above background technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wind turbine generator set variable pitch bearing and hub connection hole misalignment adjustment tool, comprising a hub and a variable pitch bearing, the outer ring and the inner ring of the variable pitch bearing are both provided with a plurality of first bolt holes in a circular array, the end of the hub is provided with a plurality of second bolt holes in a circular array, the end of the hub and the outer ring of the variable pitch bearing are fixedly connected by a plurality of first connecting bolts arranged in a circular array, the first connecting bolts penetrate the corresponding first bolt holes and the second bolt holes, the inner ring of the variable pitch bearing is fixedly connected with the blades by a plurality of second connecting bolts arranged in a circular array, and also includes a misalignment adjustment mechanism for adjusting the first connecting bolts to be concentric with the bolt holes;

[0009] The misalignment adjustment mechanism comprises a mounting assembly and an adjustment assembly. Both the mounting assembly and the adjustment assembly are detachably mounted on the wheel hub end by a first connecting bolt, and the adjustment assembly is detachably connected to the mounting assembly.

[0010] Preferably, the mounting assembly includes a pull plate, the pull plate is arc-shaped, a mounting hole is opened in the center of the pull plate, third bolt holes are symmetrically opened at both ends of the pull plate, and the first connecting bolt can pass through the third bolt hole.

[0011] Preferably, the adjustment assembly includes a connecting ring, a conical pin of an integrated structure is fixed on the surface of the connecting ring, the connecting ring can be inserted into the mounting hole, the first connecting bolt can pass through the connecting ring, and the tip of the conical pin can be inserted into the first bolt hole.

[0012] Preferably, a screw hole is opened in the middle of the side surface of the pull plate, the screw hole is connected to the mounting hole, a fixing screw is threadedly connected to the screw hole, and when the connecting ring is inserted into the mounting hole, the fixing screw abuts against the outer surface of the connecting ring.

[0013] The beneficial effects of the utility model are as follows: through the coordinated use of the hub, the pitch bearing, the first bolt hole, the second bolt hole, the first connecting bolt, the second connecting bolt, the blade and the misalignment adjustment mechanism, during the installation process, the hub end and the pitch bearing outer ring are connected, and a tension force is generated by tightening the first connecting bolt, and the tension force acts on the geometric body with a conical surface, and then the conical surface is used to squeeze the pitch bearing hole wall to generate relative displacement for misalignment adjustment. The structure is simpler, the cost is greatly reduced, and the installation operation is convenient, the practicability is good, and it is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The installation structure diagram of the hub, pitch bearing and blades provided by the utility model;

[0015] Figure 2 A structural stereogram of the hub and the pitch bearing provided by the utility model;

[0016] Figure 3 A schematic diagram of the hub end structure provided by the utility model;

[0017] Figure 4 A schematic diagram of the structure in which the hub and the pitch bearing provided by the utility model are fixedly installed by means of a first connecting bolt;

[0018] Figure 5 A structural stereogram of the pull plate provided by the utility model;

[0019] Figure 6 A structural stereogram of a connecting ring and a conical pin provided by the utility model;

[0020] Figure 7 This is a stereoscopic diagram of the assembly structure of the pull plate, the connecting ring and the tapered pin provided by the utility model.

[0021] In the figure: 1. hub; 2. pitch bearing; 3. first bolt hole; 4. first connecting bolt; 5. blade; 6. pull plate; 7. mounting hole; 8. third bolt hole; 9. connecting ring; 10. conical pin; 11. screw hole; 12. second bolt hole. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Please refer to the attached Figure 1-7 The utility model provides a wind turbine generator set pitch bearing and hub connection hole misalignment adjustment tool, comprising a hub 1 and a pitch bearing 2, wherein the outer ring and the inner ring of the pitch bearing 2 are both provided with a plurality of first bolt holes 3 in a circular array, and the end of the hub 1 is provided with a plurality of second bolt holes 12 in a circular array, and the end of the hub 1 is fixedly connected with the outer ring of the pitch bearing 2 through a plurality of first connecting bolts 4 arranged in a circular array, and the first connecting bolts 4 penetrate the corresponding first bolt holes 3 and the second bolt holes 12, that is, under the action of the plurality of first connecting bolts 4, the end of the hub 1 is fixedly installed with the outer ring of the pitch bearing 2, and the inner ring of the pitch bearing 2 is fixedly connected with a blade 5 through a plurality of second connecting bolts (not shown in the figure) arranged in a circular array, and also includes a misalignment adjustment mechanism for adjusting the first connecting bolts 4 to be concentric with the bolt holes;

[0024] The misalignment adjustment mechanism includes a mounting assembly and an adjustment assembly, both of which are detachably mounted on the end of the wheel hub 1 through a first connecting bolt 4, and the adjustment assembly is detachably connected to the mounting assembly;

[0025] The mounting assembly includes a pull plate 6, which is arc-shaped to adapt to the curvature of the outer ring of the pitch bearing 2. A mounting hole 7 is provided at the center of the pull plate 6, and third bolt holes 8 are symmetrically provided at both ends of the pull plate 6. The first connecting bolts 4 can pass through the third bolt holes 8, that is, under the action of the corresponding first connecting bolts 4, the pull plate 6 can be detachably fixed to the end of the hub 1;

[0026] The adjustment component includes a connecting ring 9, and a conical pin 10 of an integrated structure is fixed on the surface of the connecting ring 9. The connecting ring 9 can be inserted into the mounting hole 7, the first connecting bolt 4 can penetrate the connecting ring 9, and the tip of the conical pin 10 can be inserted into the first bolt hole 3. Specifically, after the user fixes the pull plate 6 to the end of the hub 1 through the corresponding first connecting bolt 4, the user can then use the corresponding first connecting bolt 4 to penetrate the connecting ring 9 to fix the conical pin 10 to the end of the hub 1, and then insert the first bolt hole 3 on the outer ring of the pitch bearing 2 into the conical pin 10 accordingly, and then tighten the corresponding first connecting bolt 4 to generate tension, and the tension acts on the geometric body with a conical surface, that is, the conical pin 10, and then use the conical surface to squeeze the hole wall of the pitch bearing 2 to generate relative displacement for misalignment adjustment. The structure is simpler, the cost is greatly reduced, and the installation operation is convenient;

[0027] A screw hole 11 is opened in the middle of the side surface of the pull plate 6, and the screw hole 11 is connected with the mounting hole 7. A fixing screw (not shown in the figure) is connected to the inner thread of the screw hole 11. When the connecting ring 9 is inserted into the mounting hole 7, the fixing screw abuts against the outer surface of the connecting ring 9. Specifically, the fixing screw generates radial pressure on the connecting ring 9 to play a role of fixing the connection.

[0028] The use process of the utility model is as follows: first, the blade 5 to be adjusted is turned to make it vertically downward, the impeller is locked, and then the tool is transported into the wheel hub 1, and then the four diagonal first connecting bolts 4 are loosened with a hydraulic wrench, and then the remaining first connecting bolts 4 are loosened, and it is better to just loosen them by hand (one thread pitch), and then the first connecting bolts 4 for adjustment are screwed out, and the pull plate 6 is fixed to the end of the wheel hub 1 through the first connecting bolts 4 for adjustment, and then the corresponding first connecting bolts 4 can be used to penetrate the connecting ring 9, and the conical pin 10 can be fixed to the end of the wheel hub 1, and then the first screw on the outer ring of the pitch bearing 2 can be screwed out. The bolt hole 3 is inserted into the conical pin 10 accordingly, and then tightened by a large ratchet wrench, and then the corresponding first connecting bolt 4 is tightened with a hydraulic wrench to generate tension, and the tension acts on the geometric body with a conical surface, that is, the conical pin 10, and then the conical surface is used to squeeze the hole wall of the variable pitch bearing 2 to produce relative displacement for misalignment adjustment, that is, the variable pitch bearing 2 is rotated by adjusting the tooling to adjust the angle, and the alignment of the hole is observed during the adjustment process. After determining the adjustment degree of the installation angle, the adjustment tooling is taken out, and it is evenly tightened with an electric wrench and then tightened with a hydraulic wrench. The structure is simpler, the cost is greatly reduced, and the installation operation is convenient.

[0029] The above is only a preferred embodiment of the utility model. Any person skilled in the art can modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A wind turbine generator set pitch bearing and hub connection hole misalignment adjustment tool, comprising a hub (1) and a pitch bearing (2), wherein the outer ring and the inner ring of the pitch bearing (2) are both provided with a plurality of first bolt holes (3) in a circular array, and the end of the hub (1) is provided with a plurality of second bolt holes (12) in a circular array, the end of the hub (1) and the outer ring of the pitch bearing (2) are fixedly connected by a plurality of first connection bolts (4) arranged in a circular array, the first connection bolts (4) penetrate the corresponding first bolt holes (3) and second bolt holes (12), and the inner ring of the pitch bearing (2) is fixedly connected with a blade (5) by a plurality of second connection bolts arranged in a circular array, characterized in that: It also includes a misalignment adjustment mechanism for adjusting the first connecting bolt (4) to be concentric with the bolt hole; The misalignment adjustment mechanism comprises a mounting assembly and an adjustment assembly. Both the mounting assembly and the adjustment assembly are detachably mounted on the end of the wheel hub (1) via a first connecting bolt (4). The adjustment assembly is detachably connected to the mounting assembly.

2. The wind turbine generator set variable pitch bearing and hub connection hole misalignment adjustment tool according to claim 1, characterized in that: The installation assembly comprises a pull plate (6), the pull plate (6) is arc-shaped, a mounting hole (7) is provided at the center of the pull plate (6), third bolt holes (8) are symmetrically provided at both ends of the pull plate (6), and the first connecting bolt (4) can pass through the third bolt hole (8).

3. The wind turbine generator set variable pitch bearing and hub connection hole misalignment adjustment tool according to claim 2, characterized in that: The adjustment assembly comprises a connecting ring (9), a conical pin (10) of an integral structure is fixed on the surface of the connecting ring (9), the connecting ring (9) can be inserted into the mounting hole (7), the first connecting bolt (4) can pass through the connecting ring (9), and the tip of the conical pin (10) can be inserted into the first bolt hole (3).

4. The wind turbine generator set variable pitch bearing and hub connection hole misalignment adjustment tool according to claim 3, characterized in that: A screw hole (11) is provided in the middle of the side surface of the pull plate (6), and the screw hole (11) is connected to the mounting hole (7). A fixing screw is connected to the inner thread of the screw hole (11). When the connecting ring (9) is inserted into the mounting hole (7), the fixing screw abuts against the outer surface of the connecting ring (9).

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