Multi-row cylindrical roller and special-shaped flange piece combined rotating device for connecting fan blade and hub

By using a combination rotating device of multiple rows of cylindrical rollers and special-shaped flange parts in the wind turbine set, the problem of insufficient load capacity of existing pitch bearings is solved, and the load capacity of more than 20% is improved in the existing space, reducing the weight and cost of the wind turbine set.

CN119532145APending Publication Date: 2025-02-28DALIAN KEHUI BEARING INSTRUMENT CO LTD
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Patent Information

Application Number
CN202411987848.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-02-28

AI Technical Summary

Technical Problem

The existing three-row cylindrical roller pitch bearings are restricted due to structural space limitations. Improving the load-bearing capacity can only increase the weight and cost of the wind turbine by increasing the size.

Method used

The rotating device of multiple rows of cylindrical rollers and special-shaped flange pieces is adopted to design special-shaped outer flange and inner flange with quenching raceways and mounting holes, and combine the fan-shaped radial roller isolation frame, radial quenching cylindrical rolling element and axial quenching ball end surface cylindrical rolling element to achieve higher load-bearing capacity.

Benefits of technology

Without increasing the structural space, the load-bearing capacity of the pitch bearing is increased by more than 20%, the weight and cost of the wind turbine are reduced, and the requirements of compactness are achieved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of wind generating sets, and discloses a multi-row cylindrical roller and special-shaped flange piece combined rotating device for connecting fan blades and a hub. Comprising a first special-shaped outer flange, a special-shaped inner flange, a fan-shaped radial roller isolation frame, a radial quenching cylindrical rolling body, a second special-shaped outer flange, an axial quenching ball end face cylindrical rolling body, a connecting bolt and an axial roller X-shaped isolation frame. According to the three-row-column variable-pitch bearing, the problem that the bearing capacity of the three-row-column variable-pitch bearing for the wind generating set cannot meet the requirement for the compact structure of the wind generating set is solved, the bearing capacity can be improved by 20% compared with that of an existing three-row-column variable-pitch bearing, and the size of a hub can be reduced on the premise that the service life and reliability are guaranteed; and the weight of the hub is reduced, so that the manufacturing cost of the wind generating set is reduced to a certain extent.
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Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine generator sets and relates to a combined rotating device of multiple rows of cylindrical rollers and special-shaped flanges connecting wind turbine blades and a hub. Background Art

[0002] Three-row cylindrical roller pitch bearings are a type of bearing that can withstand both axial loads and radial loads and overturning loads. They are used in wind turbines as connecting components between the blades and the hub of wind turbines to support loads and perform rotational motion.

[0003] The existing three-row cylindrical roller pitch bearings have limited load-bearing capacity due to structural space limitations. Improving the load-bearing capacity of the pitch bearings can only be solved by increasing their size and expanding the structural space. The increase in size will increase the weight and cost of the entire wind turbine. Summary of the invention

[0004] The object of the present invention is to provide a combined rotating device of multiple rows of cylindrical rollers and special-shaped flanges for connecting fan blades and a hub, so as to solve the problems raised in the prior art.

[0005] The technical solution of the present invention:

[0006] A multi-row cylindrical roller and special-shaped flange combined rotating device connecting a fan blade and a hub, comprising a first special-shaped outer flange 1, a special-shaped inner flange 2, a fan-shaped radial roller spacer 3, a radially quenched cylindrical rolling body 4, a second special-shaped outer flange 5, an axially quenched ball end face cylindrical rolling body 6, a connecting bolt 8 and an axial roller X-shaped spacer 9;

[0007] The first special-shaped outer flange 1 is L-shaped, and its inner end face and inner diameter face are linear quenching raceways, the transition area between the linear quenching raceway of the inner end face and the linear quenching raceway of the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes;

[0008] The special-shaped inner flange 2 is a convex structure with a groove on the top. The two convex ribs and the top groove are three straight quenching raceways. The outer diameter of the L-shaped bottom surface of the two convex ribs is a quenching rib, the inner diameter is a gear, and the end surface is drilled with circumferentially distributed mounting holes;

[0009] The second special-shaped outer flange 5 is L-shaped, the inner end face of which is a quenching raceway, the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes;

[0010] The linear quenching raceway of the top groove of the special-shaped inner flange 2 is installed with a fan-shaped radial roller spacer 3 and a radial quenching cylindrical rolling body 4; the two linear quenching raceways of the convex two ribs are installed with an axial quenching ball end face cylindrical rolling body 6 and an axial roller X-shaped spacer 9;

[0011] The linear quenching raceway of the top groove of the first special-shaped outer flange 1 and the special-shaped inner flange 2 is installed with a fan-shaped radial roller spacer 3, and the linear quenching raceway of the convex upper side rib is installed with an axial quenching ball end face cylindrical rolling body 6 and an axial roller X-shaped spacer 9 component for combination;

[0012] The second special-shaped outer flange 5 is combined with the linear quenched raceway of the convex lower rib of the special-shaped inner flange 2, which is equipped with an assembly of axially quenched ball end face cylindrical rolling elements 6 and axial roller X-shaped spacer frames 9;

[0013] The axially quenched ball end face cylindrical rolling body 6 and the axial roller X-shaped spacer 9 are constrained by the quenching flange, and when the axially quenched ball end face cylindrical rolling body 6 rotates in the annular track, the ball end face of the axially quenched ball end face cylindrical rolling body 6 forms an arc line contact with the quenching flange;

[0014] The first special-shaped outer flange 1 and the second special-shaped outer flange 5 are combined by means of stop fitting and mounting hole alignment, the first special-shaped outer flange 1 and the top groove linear quenching raceway of the special-shaped inner flange 2 are installed with a fan-shaped radial roller isolation frame 3, the linear quenching raceway of the convex side ribs is installed with an axially quenched ball end face cylindrical rolling body 6, an axial roller X-shaped isolation frame 9 assembly and the second special-shaped outer flange 5 are connected into one by the outer flange connecting bolts 8.

[0015] Beneficial effects of the present invention: The present invention combines multiple rows of cylindrical rollers with special-shaped flanges, and utilizes a special-shaped outer flange with two quenching raceways and mounting holes and oil holes in an L shape. The inner end face and the inner diameter face of the L shape are linear quenching raceways, and the transition area between the inner end face quenching raceway and the inner diameter face quenching raceway is a quenching rib. The end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes. The three quenching raceways, mounting holes and gear special-shaped inner flanges are convex tops with grooves, and the two convex ribs and the top grooves are three linear quenching raceways. The outer diameter of the L-shaped bottom surface of the two convex ribs is a quenching rib, the inner diameter is a gear, and the end face is drilled with circumferentially distributed mounting holes. The special-shaped outer flange with a quenching raceway and mounting holes and oil holes is L-shaped, the inner end face of the L-shape is the quenching raceway, the inner diameter face is the quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes. The mounting hole diameter, the number of mounting holes, and the mounting hole pitch circle diameter of the first special-shaped outer flange 1 are the same as the mounting hole diameter, the number of mounting holes, and the mounting hole pitch circle of the second special-shaped outer flange 5.The number of mounting holes and the pitch circle diameter of the first special-shaped outer flange 1 and the second special-shaped outer flange 5 are the same as the number of mounting holes and the pitch circle diameter of the hub; the number of mounting holes and the pitch circle diameter of the mounting holes of the special-shaped inner flange 2 are the same as the number of mounting holes and the pitch circle diameter of the mounting holes at the root of the blade; the linear quenching raceway with three quenching raceways and mounting holes and the top groove of the top of the gear special-shaped inner flange is installed with a fan-shaped radial roller isolation frame and a radial quenching cylindrical rolling body; the two linear quenching raceways on the two convex ribs are installed with axial quenching ball end face cylindrical rolling bodies and axial roller X-shaped isolation frames; the two quenching raceways with two quenching raceways and mounting hole oil holes are different The outer flange with three quenching raceways and mounting holes and the linear quenching raceway on the top groove of the gear-shaped inner flange is installed with a fan-shaped radial roller isolation frame, and the linear quenching raceway with the convex upper rib is installed with the axial quenching ball end face cylindrical rolling element and the axial roller X-shaped isolation frame components are combined; the inner end face quenching raceway of the L-shaped inner flange with two quenching raceways and mounting holes and oil holes, the linear quenching raceway of the inner diameter rib and the convex upper rib of the shaped inner flange, the L-shaped bottom outer diameter quenching rib is combined to form a ring track, the axial quenching ball end face cylindrical rolling element and the axial roller X-shaped isolation frame are constrained by the quenching rib. It can rotate on the circular track; the inner diameter quenching raceway with two quenching raceways and mounting holes and oil holes of the special-shaped outer flange is combined with the linear quenching raceway with three quenching raceways, mounting holes and the convex top groove of the gear-shaped inner flange to form a circular raceway, and the fan-shaped radial roller isolation frame and the radial quenching cylindrical rolling element can rotate on the circular track; the special-shaped outer flange with one quenching raceway and mounting holes and oil holes is combined with the linear quenching raceway with three quenching raceways, mounting holes and the convex lower side rib of the gear-shaped inner flange, which is equipped with axially quenched ball end face cylindrical rolling elements and axial roller X-shaped isolation frames; the The inner end face quenched raceway of the L-shaped inner flange with the oil hole and the mounting hole, the inner diameter rib and the straight quenched raceway with three quenched raceways and the mounting hole and the convex lower rib of the gear-shaped inner flange, and the L-shaped bottom outer diameter quenched rib are combined to form an annular track. The axially quenched ball end face cylindrical rolling elements and the axial roller X-shaped isolation frame can rotate on the annular track under the constraint of the quenched rib; when the axially quenched ball end face cylindrical rolling elements and the axial roller X-shaped isolation frame rotate on the annular track under the constraint of the quenched rib, the ball end face of the axially quenched ball end face cylindrical rolling elements and the axial roller X-shaped isolation frame form a circular arc line contact with the quenched rib when they rotate on the annular track.The first special-shaped outer flange 1 and the second special-shaped outer flange 5 are combined by means of stop fitting and mounting hole alignment; the special-shaped outer flange with two quenching raceways and mounting holes and oil holes and the linear quenching raceway with three quenching raceways and mounting holes and the top groove of the gear-shaped inner flange are installed with a fan-shaped radial roller isolation frame 3; the linear quenching raceway with convex side ribs is installed with an axially quenched ball end face cylindrical rolling element, an axial roller X-shaped isolation frame assembly and the special-shaped outer flange with a quenching raceway and an oil hole for mounting holes are connected as a whole by connecting bolts; the special-shaped inner flange with three quenching raceways and mounting holes and the gear, and the special-shaped outer flange with two quenching raceways and mounting holes and oil holes, and the special-shaped outer flange with one quenching raceway and mounting holes and oil holes can perform relative rotation under the support of radially quenched cylindrical rolling elements and axially quenched ball end face cylindrical rolling elements. The components with three quenched raceways, mounting holes and gear-shaped inner flange, two quenched raceways and mounting hole oil hole-shaped outer flange, and one quenched raceway and mounting hole oil hole-shaped outer flange are equipped with sealing rings at adjacent positions on the end faces. This structure solves the problem that the existing three-row cylindrical roller pitch bearings are restricted in their carrying capacity due to structural space limitations. To improve the carrying capacity of the pitch bearings, the only way is to increase the size and expand the structural space. The increase in size will increase the weight and cost of the entire wind turbine. The bearing capacity of the pitch bearing is increased by more than 20% within the structural space size range of the existing three-row cylindrical roller pitch bearings. This meets the requirements for compact wind turbines and reduces the weight and cost of the entire wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Figure 2 It is a schematic diagram of the main structure of the present invention;

[0017] In the figure: 1 first special-shaped outer flange, 2 special-shaped inner flange, 3 sector-shaped radial roller spacer, 4 radially hardened cylindrical rolling element, 5 second special-shaped outer flange, 6 axially hardened ball end face cylindrical rolling element, 7 sealing ring, 8 connecting bolts, 9 axial roller X-shaped spacer. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0019] See also Figure 1 Figure 2 , a multi-row cylindrical roller and special-shaped flange combined rotating device connecting the fan blade and the hub, comprising a first special-shaped outer flange 1, a special-shaped inner flange 2, a fan-shaped radial roller spacer 3, a radially quenched cylindrical rolling body 4, a second special-shaped outer flange 5, an axially quenched ball end face cylindrical rolling body 6, a sealing ring 7, a connecting bolt 8 and an axial roller X-shaped spacer 9;

[0020] The first special-shaped outer flange 1 is L-shaped, and its inner end face and inner diameter face are linear quenching raceways, the transition area between the linear quenching raceway of the inner end face and the linear quenching raceway of the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes; the special-shaped inner flange 2 is a convex structure with a groove on the top, the two ribs of the convex shape and the top groove are three linear quenching raceways, the outer diameter of the L-shaped bottom surface of the two ribs of the convex shape is a quenching flange, the inner diameter is a gear, and the end face is drilled with circumferentially distributed mounting holes; the second special-shaped outer flange 5 is L-shaped, its inner end face is a quenching raceway, the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes; the linear quenching raceway of the top groove of the special-shaped inner flange 2 The track is equipped with a fan-shaped radial roller isolation frame 3 and a radially quenched cylindrical rolling body 4; the two straight quenched raceways of the two convex ribs are equipped with axially quenched ball end face cylindrical rolling bodies 6 and axial roller X-shaped isolation frames 9; the first special-shaped outer flange 1 and the straight quenched raceway of the top groove of the special-shaped inner flange 2 are equipped with a fan-shaped radial roller isolation frame 3, and the straight quenched raceway of the convex upper side rib is equipped with an axially quenched ball end face cylindrical rolling body 6 and an axial roller X-shaped isolation frame 9 component; the straight quenched raceway and quenched rib of the inner side end face of the first special-shaped outer flange 1 and the straight quenched raceway and quenched rib of the convex upper side rib of the special-shaped inner flange 2 are combined to form an annular track, and the axially quenched ball end face cylindrical rolling body 6 and the axial roller X-shaped isolation frame 9 are installed in the quenching Under the constraint of the quenching edge, it rotates in the annular track; the linear quenching raceway of the inner diameter surface of the first special-shaped outer flange 1 and the linear quenching raceway of the top groove of the special-shaped inner flange 2 are combined to form an annular raceway, and the fan-shaped radial roller isolation frame 3 and the radial quenching cylindrical rolling element 4 rotate in the annular track; the second special-shaped outer flange 5 and the linear quenching raceway of the convex lower side rib of the special-shaped inner flange 2 are combined with the components of axially quenched ball end face cylindrical rolling element 6 and axial roller X-shaped isolation frame 9; the inner end face of the second special-shaped outer flange 5 is the quenching raceway, the quenching edge and the linear quenching raceway of the convex lower side rib of the special-shaped inner flange 2, the quenching edge are combined to form an annular track, the axially quenched ball end face cylindrical rolling element 6, the axial roller X-shaped isolation frame The frame 9 rotates in the annular track under the constraint of the quenching flange; the axially quenched ball end face cylindrical rolling body 6 and the axial roller X-shaped isolation frame 9 rotate in the annular track under the constraint of the quenching flange, and the ball end face of the axially quenched ball end face cylindrical rolling body 6 forms an arc line contact with the quenching flange; the first special-shaped outer flange 1 and the second special-shaped outer flange 5 are combined through the stop fitting and the mounting hole alignment, the first special-shaped outer flange 1 and the top groove linear quenching raceway of the special-shaped inner flange 2 are installed with a fan-shaped radial roller isolation frame 3, the linear quenching raceway of the convex side ribs is installed with the axially quenched ball end face cylindrical rolling body 6, the axial roller X-shaped isolation frame 9 assembly and the second special-shaped outer flange 5 are connected into one by the outer flange connecting bolts 8;The combined special-shaped inner flange 2, the first special-shaped outer flange 1 and the second special-shaped outer flange 5 can perform relative rotational motion under the support of the radially quenched cylindrical rolling element 4 and the axially quenched ball end cylindrical rolling element 6 inside the assembly; the combined first special-shaped outer flange 1 and the second special-shaped outer flange 5 are equipped with sealing rings 7 at the adjacent positions of the end faces of the special-shaped inner flange 2. ;

[0021] The mounting hole diameter, the number of mounting holes, and the mounting hole pitch circle diameter of the first special-shaped outer flange 1 are the same as the mounting hole diameter, the number of mounting holes, and the mounting hole pitch circle of the second special-shaped outer flange 5 .

[0022] The number of mounting holes and the pitch circle diameter of the mounting holes of the first special-shaped outer flange 1 and the second special-shaped outer flange 5 are the same as the number of mounting holes and the pitch circle diameter of the mounting holes of the wheel hub.

[0023] The first special-shaped outer flange 1 and the second special-shaped outer flange 5 are combined by means of stopper matching and mounting hole alignment.

[0024] The number of mounting holes and the pitch circle diameter of the mounting holes of the special-shaped inner flange 2 are the same as the number of mounting holes and the pitch circle diameter of the mounting holes at the root of the blade.

[0025] The present invention solves the problem that the load-bearing capacity of the three-row column variable pitch bearing for wind turbines cannot meet the requirements of the compact structure of the wind turbines. The load-bearing capacity of the three-row column variable pitch bearings used currently can be increased by 20%. This invention can reduce the size of the hub and reduce the weight of the hub while ensuring the service life and reliability, thereby reducing the manufacturing cost of the wind turbine to a certain extent.

Claims

1. A combined rotating device of multiple rows of cylindrical rollers and special-shaped flanges for connecting fan blades and hubs, characterized in that: The multi-row cylindrical roller and special-shaped flange assembly rotating device comprises a first special-shaped outer flange (1), a special-shaped inner flange (2), a sector-shaped radial roller spacer (3), a radially quenched cylindrical rolling body (4), a second special-shaped outer flange (5), an axially quenched ball end face cylindrical rolling body (6), a sealing ring (7), a connecting bolt (8) and an axial roller X-shaped spacer (9); The first special-shaped outer flange (1) is L-shaped, and its inner end face and inner diameter face are linear quenching raceways, the transition area between the linear quenching raceway of the inner end face and the linear quenching raceway of the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with circumferentially distributed oil holes; the special-shaped inner flange (2) is a convex structure with a groove on the top, the two ribs of the convex shape and the top groove are three linear quenching raceways, the outer diameter of the L-shaped bottom surface of the two ribs of the convex shape is a quenching flange, the inner diameter is a gear, and the end face is drilled with circumferentially distributed mounting holes; the second special-shaped outer flange (5) is L-shaped, and its inner end face is a quenching raceway, the inner diameter face is a quenching flange, the end face is drilled with circumferentially distributed mounting holes, and the outer diameter is drilled with a circular The oil holes are distributed around the circumference of the special-shaped inner flange (2); the linear quenching raceway of the top groove of the special-shaped inner flange (2) is equipped with a fan-shaped radial roller isolation frame (3) and a radial quenching cylindrical rolling body (4); the two linear quenching raceways of the convex two ribs are equipped with axial quenching ball end face cylindrical rolling bodies (6) and axial roller X-shaped isolation frames (9); the first special-shaped outer flange (1) and the linear quenching raceway of the top groove of the special-shaped inner flange (2) are equipped with a fan-shaped radial roller isolation frame (3), and the linear quenching raceway of the convex upper side rib is equipped with an axial quenching ball end face cylindrical rolling body (6) and an axial roller X-shaped isolation frame (9) are combined; the linear quenching raceway of the inner end face of the first special-shaped outer flange (1) is equipped with a fan-shaped radial roller isolation frame (3) and a convex upper side rib. The linear quenching raceway, quenching rib and the convex upper rib of the special-shaped inner flange (2) are combined to form an annular track. The axially quenched ball end face cylindrical rolling body (6) and the axial roller X-shaped spacer (9) rotate in the annular track under the constraint of the quenching rib; the linear quenching raceway of the inner diameter surface of the first special-shaped outer flange (1) and the linear quenching raceway of the top groove of the special-shaped inner flange (2) are combined to form an annular raceway. The fan-shaped radial roller spacer (3) and the radially quenched cylindrical rolling body (4) rotate in the annular track; the linear quenching raceway of the second special-shaped outer flange (5) and the convex lower rib of the special-shaped inner flange (2) are installed with the axially quenched ball end face cylindrical rolling body (6) and the axial roller X-shaped spacer (9) The components of the cylindrical rolling body (6) and the axial roller X-shaped spacer (9) are combined; the inner end face of the second special-shaped outer flange (5) is a quenching raceway, a quenching flange, and the linear quenching raceway and quenching flange of the convex lower rib of the special-shaped inner flange (2) are combined to form an annular track, and the axially quenched ball end face cylindrical rolling body (6) and the axial roller X-shaped spacer (9) are constrained by the quenching flange and rotate in the annular track; when the axially quenched ball end face cylindrical rolling body (6) and the axial roller X-shaped spacer (9) are constrained by the quenching flange and rotate in the annular track, the ball end face of the axially quenched ball end face cylindrical rolling body (6) forms a circular arc line contact with the quenching flange;The first special-shaped outer flange (1) and the second special-shaped outer flange (5) are combined by means of stopper matching and mounting hole alignment; the first special-shaped outer flange (1) and the top groove linear quenching raceway of the special-shaped inner flange (2) are installed with a fan-shaped radial roller spacer (3); the linear quenching raceway of the convex side rib is installed with an axial quenching ball end face cylindrical rolling body (6), and the axial roller X-shaped spacer (9) assembly and the second special-shaped outer flange (5) are connected into one piece by means of outer flange connecting bolts (8); the combined special-shaped inner flange (2) and the first special-shaped outer flange (1) and the second special-shaped outer flange (5) can perform relative rotational motion under the support of the radial quenching cylindrical rolling body (4) and the axial quenching ball end face cylindrical rolling body (6) inside the assembly; the combined first special-shaped outer flange (1) and the second special-shaped outer flange (5) and the special-shaped inner flange (2) are installed with sealing rings (7) at the adjacent positions of the end faces. ; 2. The multi-row cylindrical roller and special-shaped flange combined rotating device according to claim 1, characterized in that: The mounting hole diameter, the number of mounting holes and the mounting hole pitch circle diameter of the first special-shaped outer flange (1) are the same as the mounting hole diameter, the number of mounting holes and the mounting hole pitch circle of the second special-shaped outer flange (5).

3. The multi-row cylindrical roller and special-shaped flange combined rotating device according to claim 1, characterized in that: The number of mounting holes and the pitch circle diameter of the mounting holes of the first special-shaped outer flange (1) and the second special-shaped outer flange (5) are the same as the number of mounting holes and the pitch circle diameter of the mounting holes of the wheel hub.

4. The multi-row cylindrical roller and special-shaped flange combined rotating device according to claim 1, characterized in that: The first special-shaped outer flange (1) and the second special-shaped outer flange (5) are combined by means of stopper matching and mounting hole alignment.

5. The multi-row cylindrical roller and special-shaped flange combined rotating device according to claim 1, characterized in that: The number of mounting holes and the pitch circle diameter of the mounting holes of the special-shaped inner flange (2) are the same as the number of mounting holes and the pitch circle diameter of the mounting holes at the root of the blade.