Cylindrical roller bearing with wind power outer sleeve provided with fixed pressing plate and assembling and disassembling method of cylindrical roller bearing

Abstract

The invention relates to a wind power outer sleeve cylindrical roller bearing with a fixed pressing plate and an assembling and disassembling method thereof, the wind power outer sleeve cylindrical roller bearing comprises an outer ring, a loose rib, an inner ring, a pressing plate assembly and a retainer, the retainer comprises a retainer seat and a retainer cover, the retainer cover is arranged on the retainer seat, and the retainer seat and the retainer cover form a complete retainer; bolt holes are uniformly formed in the retainer cover corresponding to the position of each retainer beam; a pressing plate assembly is arranged at any bolt hole position of the outer end face of the retainer cover, the edge of one end of the pressing plate assembly covers the retainer cover area, and the edge of the other end of the pressing plate assembly extends towards the loose rib and at least covers the inner diameter edge of the loose rib. The pressing plate assembly is additionally arranged and is matched with the bearing assembly and the bearing seat, so that the effect that one plate has two purposes is achieved; different functions of limiting and fixing under two working conditions of packaging and transportation and on-machine use are realized, so that the problem that the bearing axially moves in the bearing seat due to loose sleeve in the loading and transportation process and loose sealing cover in the on-machine use process is effectively solved.

Description

Technical Field

[0001] The invention relates to a large-scale wind power bearing structure, in particular to a cylindrical roller bearing with a fixed pressure plate on a wind power jacket and a mounting and disassembly method thereof, and belongs to the technical field of bearings. Background Art

[0002] Wind power cylindrical roller bearings are a type of rolling bearings with the advantages of high rotation accuracy and easy use. Due to the split single-sided flat ring structure, the flat ring of the bearing is not fixed when the bearing product is packaged and sent to the user. When the user disassembles and assembles it, the flat ring is separated from the bearing and it is very easy for the bearing to fall apart. The flat ring may even hit people or fall directly to the ground and break into pieces, becoming waste. Therefore, the bearing is inconvenient during installation and transportation, which may pose a safety hazard or increase the scrap rate.

[0003] At the same time, after the traditional large-scale FD wind power cylindrical roller bearing is installed, the bearing outer sleeve plane is in contact with the bearing seat sealing cover plane. However, the sealing cover fixing screws will loosen after the bearing is installed and used for a period of time. This directly increases the axial clearance of the bearing in the bearing seat, and indirectly causes the bearing inner sleeve plane and the outer sleeve plane to be not on the same plane, which directly leads to uneven force during the operation of the bearing and shortens the service life of the bearing. The shorter the bearing is used, the more frequent the wind turbine damage, causing great losses to both the bearing manufacturer and the wind turbine company. Summary of the invention

[0004] In order to solve the problem that the bearing cannot be used normally because the sealing cover loosens when the use time of the wind turbine reaches a predetermined period or even exceeds the predetermined period, the purpose of the present invention is to provide a cylindrical roller bearing with a fixed pressure plate on a wind turbine jacket and a loading and unloading method thereof. By improving the structure of the original single-row cylindrical roller bearing series, the problems of loosening of the bearing during installation and transportation and axial movement of the bearing in the bearing seat due to loose sealing cover when the bearing is used on the machine can be solved, thereby extending the service life of the bearing.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket, comprising: an outer ring, a flat retaining ring, an inner ring, a pressure plate assembly, a plurality of cylindrical rollers and a cage, wherein the cage comprises a cage seat and a cage cover, a plurality of cage beams are evenly arranged around one side of the cage seat, and pockets corresponding to a plurality of rollers are arranged between each two adjacent cage beams, a cage cover is arranged on the cage seat and forms a complete cage with the cage cover; screws are evenly arranged on the cage cover corresponding to the position of each cage beam Bolt hole, the cage cover is connected to the cage seat by a number of bolts; the outer ring is a single rib structure, and a flat rib is provided on the outer ring end face opposite to the single rib position, and a roller shoulder is formed on the inner diameter end of the flat rib, and the surface where the outer diameter is located is flush with the outer peripheral surface of the outer ring; the plurality of cylindrical rollers are all rollingly arranged between the outer ring raceway and the inner ring raceway; a pressure plate assembly is arranged at any bolt hole position on the outer end face of the cage cover, and the edge of one end of the pressure plate assembly covers the cage cover area, and the edge of the other end extends toward the flat rib and at least covers the inner diameter edge of the flat rib; Furthermore, the number of the pressure plate assemblies is set to 3-4, which are evenly distributed on the retaining frame cover along the circumference of the bearing; the number of the pressure plate assemblies can be increased according to the stress condition of the entire bearing to ensure balanced stress.

[0006] Furthermore, the pressure plate assembly includes: a pressure plate and a matching fixing bolt; the pressure plate is provided with a pressure plate bolt hole identical to the bolt hole of the cage cover, and the pressure plate is passed through the pressure plate bolt hole from the outside of the pressure plate by the fixing bolt and screwed into the bolt hole on the cage cover, thereby fixing the pressure plate on the cage cover; Furthermore, the pressure plate is an isosceles trapezoidal structure that is narrow at the top and wide at the bottom, with the lower wide side facing the inner ring and the edge covering the inner diameter edge of the retaining frame cover, and the upper narrow side facing the flat retaining ring, and the narrow side edge extends beyond the inner diameter edge of the flat retaining ring and close to half of the width of the end face of the flat retaining ring; thereby, the flat retaining ring is blocked and limited by the upper narrow side area of ​​the pressure plate; Furthermore, the bolt holes on the pressing plate are located towards the lower wide side area of ​​the pressing plate.

[0007] In the above structure of the present scheme, after the bearing is assembled, 3-4 bolt hole positions are selected from the retaining cover along the circumferential direction to install the pressure plate assembly in sequence, so that the pressure plate of the pressure plate assembly extends to the outer diameter of the outer end surface of the flat retaining ring, thereby blocking the flat retaining ring to achieve limiting. The bearing with the pressure plate assembly installed is packed in a box for transportation to prevent the bearing parts from loosening during the transportation process of the bearing and when the user disassembles it.

[0008] Furthermore, the design of the bearing of the present invention not only takes into account the problem that the bearing is prone to loosening during transportation, but also takes into account the problem that when the bearing seat sealing cover is loose during the use of the bearing on the machine, an axial gap is generated in the bearing seat. By converting the installation position of the pressure plate and fixing it to the bearing seat, the flat retaining ring is positioned, thereby preventing the bearing from having an axial gap in the bearing seat during operation and causing the outer ring plane and the inner ring plane of the bearing to be not in the same plane; the "one plate for two uses" is achieved through the conversion of the pressure plate.

[0009] Furthermore, a bearing seat is arranged outside the outer ring of the bearing, the bearing is embedded and installed in the bearing seat so that the outer end surface of the bearing flat retaining ring is flush with the end surface of the bearing seat, and a sealing cover is arranged at the outer end of the bearing seat, and the sealing cover is connected to the bearing flat retaining ring by screws; When the above-mentioned bearing is used on a machine, the inner ring is fixed to the equipment shaft and the outer ring is placed in the bearing seat. The pressure plate of the pressure plate assembly arranged on the bearing retainer cover is flipped forward or backward to achieve mirror symmetry with the original pressure plate position, so that the wide side area of ​​the pressure plate corresponds to the end face of the bearing seat. Bolt holes matching the fixing screws in the pressure plate assembly are provided on the end face of the bearing seat, and the pressure plate is fixed to the bearing seat by the fixing bolts of the pressure plate assembly, while the narrow side area of ​​the pressure plate corresponds to the outer end face of the bearing flat retaining ring to achieve the positioning of the bearing. With this design, even if the sealing cover is loose, the pressure plate can be used to control the bearing in the bearing seat so that there will be no axial movement, thereby extending the service life of the bearing.

[0010] The method of loading and unloading the cylindrical roller bearing with the above wind turbine jacket and fixed pressure plate is: When the finished bearing needs to be packaged and transported, select any 3-4 bolt holes on the cage cover, and fix each pressure plate on the cage cover in sequence with fixing screws, so that the pressure plate forms a limit on the flat retaining ring, thereby completing the installation of the pressure plate; The state of the pressure plate on the bearing retainer cover after the pressure plate is installed is that the narrow side area of ​​the pressure plate is pressed on the flat retaining ring toward the outer diameter direction of the bearing; When the bearing needs to be used on the machine, the bearing fixing sleeve with the pressure plate installed is installed on the equipment shaft and embedded in the bearing seat; at this time, loosen the fixing bolts of the first pressure plate assembly, then rotate the pressure plate 180° clockwise or counterclockwise, and then tighten the fixing bolts to fix the pressure plate on the end face of the bearing seat to achieve the positioning of the pressure plate on the bearing; after completing the position conversion of the first pressure plate, convert the position of the second pressure plate according to the above operation, and so on, and finally complete the disassembly and conversion of all pressure plate assemblies step by step; After the position of each of the above-mentioned pressure plates is changed, the narrow side area of ​​the pressure plate is pressed on the flat retaining ring toward the inner diameter direction of the bearing.

[0011] The beneficial effects of the solution of the cylindrical roller bearing with a fixed pressure plate of the wind turbine jacket of the present invention are: The bearing of the present invention achieves the effect of "one plate for two uses" by adding a pressure plate assembly and cooperating with the bearing assembly and the bearing seat respectively; different limiting and fixing functions are realized under two working conditions: the packaging and transportation process and the machine use, thereby effectively solving the problems of loosening of the sleeve during installation and transportation and axial movement of the bearing in the bearing seat due to loose sealing cover when the machine is used, ensuring the normal use and operation of the bearing, thereby extending the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a cylindrical roller bearing with a fixed pressure plate of a wind turbine jacket according to the present invention.

[0013] Figure 2 for Figure 1 Partial side view of .

[0014] Figure 3 for Figure 1 Structural diagram of medium voltage board.

[0015] Figure 4 This is a structural diagram of the fixing bolts in the pressure plate assembly.

[0016] Figure 5 This is an assembly drawing for the bearing of the present invention when it is put on a machine.

[0017] Figure 6 for Figure 5 Partial side view of .

[0018] In the figure, 1, outer ring, 2, flat retaining ring, 3, inner ring, 4, cylindrical roller, 5, cage cover, 6, cage cover bolt hole, 7, pressure plate, 8, fixing bolt, 7.1, pressure plate bolt hole, 7.2, lower wide side, 7.3, upper narrow side, 9, bearing seat. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] like Figure 1 , 2The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket shown in the figure comprises: an outer ring 1, a flat retaining ring 2, an inner ring 3, a pressure plate assembly, a plurality of cylindrical rollers 4 and a cage, wherein the cage comprises a cage seat and a cage cover 5. A plurality of cage beams are evenly arranged around one side of the cage seat, and pockets corresponding to the plurality of rollers 4 are provided between each two adjacent cage beams. A cage cover 5 is arranged on the cage seat and forms a complete cage with the cage cover 5; bolt holes 6 are evenly arranged on the cage cover 5 corresponding to the position of each cage beam, and the cage cover 5 is provided with a plurality of bolt holes 6 through the cage cover 5. The dry bolts are connected with the cage seat; the outer ring 1 is a single rib structure, and a flat rib 2 is arranged on the end face of the outer ring 1 opposite to the single rib position, and a roller 4 shoulder is formed on the inner diameter end of the flat rib 2, and the surface where the outer diameter is located is arranged flush with the outer circumferential surface of the outer ring 1; the plurality of cylindrical rollers 4 are all arranged to roll between the outer ring raceway and the inner ring raceway; a pressure plate assembly is arranged at any bolt hole 6 position on the outer end face of the cage cover 5, and one end edge of the pressure plate assembly covers the cage cover 5 area, and the other end edge extends toward the flat rib 2 and at least covers the inner diameter edge of the flat rib 2; In this embodiment, the number of the pressure plate assemblies is set to 4, which are evenly distributed on the cage cover 5 along the circumference of the bearing; like Figure 3-4 As shown, the pressure plate assembly includes: a pressure plate 7 and a fixing bolt 8 matched therewith; a pressure plate bolt hole 7.1 identical to the retainer cover bolt hole 6 is opened on the pressure plate 7, and the pressure plate 7 passes through the pressure plate bolt 7.1 hole from the outside of the pressure plate 7 through the fixing bolt 8 and is screwed into the bolt hole 6 on the retainer cover 5, thereby fixing the pressure plate 7 on the retainer cover 5; Furthermore, the pressing plate 7 is an isosceles trapezoidal structure that is narrow at the top and wide at the bottom, with the lower wide side 7.2 facing the inner ring 3 and the edge covering the inner diameter edge of the retaining frame cover 5, and the upper narrow side 7.3 facing the flat retaining ring, and the edge of the narrow side 7.3 extends beyond the inner diameter edge of the flat retaining ring 2 and close to half of the width of the end face of the flat retaining ring 2; thereby, the flat retaining ring 2 is blocked and limited by the upper narrow side 7.3 of the pressing plate 7; Furthermore, the bolt holes 7 . 1 on the pressing plate 7 are located towards the lower wide side 7 . 2 of the pressing plate 7 .

[0021] In the above structure of the present scheme, after the bearing is assembled, four bolt holes 6 are selected from the retaining cover 5 along the circumferential direction to install the pressure plate assembly in sequence, so that the pressure plate 7 of the pressure plate assembly extends to the outer diameter of the outer end surface of the flat retaining ring 2, thereby blocking the flat retaining ring 2 to achieve position limiting; the bearing with the pressure plate assembly installed is packed in a box for transportation to prevent the bearing parts from loosening during the transportation process of the bearing and when the user disassembles it.

[0022] The design of the bearing of the present invention is not only based on the consideration of solving the problem that the bearing is prone to loosening during transportation, but also based on the problem that when the bearing seat sealing cover is loosened during the use of the bearing on the machine, an axial gap is generated in the bearing seat. By converting the installation position of the pressure plate 7 and fixing it to the bearing seat 9, the flat retaining ring 2 is positioned, thereby preventing the bearing from having an axial gap in the bearing seat 9 during operation and causing the outer ring plane and the inner ring plane of the bearing to be not in the same plane; the conversion of the pressure plate 7 realizes "one plate for two uses".

[0023] like Figure 5-6 As shown, a bearing seat 9 is arranged outside the bearing outer ring 1, and the bearing is embedded and installed in the bearing seat 9 so that the outer end surface of the bearing flat retaining ring 2 is flush with the end surface of the bearing seat 9. A sealing cover is arranged at the outer end of the bearing seat 9, and the sealing cover is connected to the bearing flat retaining ring by screws; When the above-mentioned bearing is used on a machine, the inner ring 3 is fixed to the equipment shaft, and the outer ring 1 is placed in the bearing seat 9. The pressure plate 7 of the pressure plate assembly arranged on the bearing retainer cover 5 is flipped forward or backward to achieve mirror symmetry with the original pressure plate position, so that the wide side 7.2 area of ​​the pressure plate corresponds to the end face of the bearing seat 9. The end face of the bearing seat 9 is provided with bolt holes matching the fixing screws 8 in the pressure plate assembly, and the pressure plate 7 is fixed to the bearing seat 9 by the fixing bolts 8 of the pressure plate assembly, and the narrow side 7.3 area of ​​the pressure plate 7 corresponds to the outer end face of the bearing flat retaining ring 2 to achieve the positioning of the bearing. With this design, even if the sealing cover is loose, the pressure plate 7 can be used to control the bearing in the bearing seat 9 without axial movement, thereby extending the service life of the bearing.

[0024] It should be noted in this solution that the bolt holes 7.1 on the pressure plate 7 are located towards the lower wide side 7.2 of the pressure plate 7, in order to ensure that the bolt holes 7.1 are located on the end faces of the retaining cover 5 and the bearing seat 9 before and after the pressure plate 7 is flipped over.

[0025] It should also be noted that the pressure plate assembly of this solution needs to be assembled with the bearing and sent together with the bearing product when the bearing product is packaged, transported and sent to the user. There is no need to disassemble the pressure plate assembly after transportation and packaging disassembly.

[0026] The method of loading and unloading the cylindrical roller bearing with the above wind turbine jacket and fixed pressure plate is: When the finished bearing needs to be packaged and transported, select the position of any four bolt holes 6 on the cage cover 5, and fix each pressing plate 7 on the cage cover 5 in sequence through the fixing bolts 8, so that the pressing plate 7 forms a limit to the flat retaining ring 2, thereby completing the installation of the pressing plate 7; The state of the pressure plate 7 on the bearing retainer cover 5 after the pressure plate 7 is installed is that the narrow side 7.3 of the pressure plate is pressed on the flat retaining ring 2 in the direction of the outer diameter of the bearing; When the bearing needs to be used on the machine, the bearing fixed sleeve with the pressure plate 7 installed is installed on the equipment shaft and embedded in the bearing seat 9; at this time, the fixing bolt 8 of the first pressure plate assembly is loosened, and then the pressure plate 7 is rotated 180° clockwise or counterclockwise, and then the fixing bolt 8 is tightened to fix the pressure plate 7 on the end face of the bearing seat 9 to achieve the positioning of the pressure plate 7 on the bearing; after completing the position conversion of the first pressure plate 7, the position conversion of the second pressure plate 7 is carried out according to the above operation, and so on, and finally the disassembly conversion of the four pressure plate assemblies is gradually completed; After the position of each of the above-mentioned pressure plates 7 is converted, the narrow side 7.3 area of ​​the pressure plate is pressed on the flat retaining ring 2 toward the inner diameter direction of the bearing; the conversion of the above-mentioned pressure plates 7 is carried out one by one in a gradual relay, because after the position of the first pressure plate 7 is converted, the pressure plate 7 is separated from the fixation of the retaining frame cover 5 and the restriction on the flat retaining ring 2 is separated here, but the bearing can still be fixed by the remaining pressure plates 7 still fixed on the retaining frame cover 5; when the conversion and fixation of the previous pressure plate 7 is completed, the next conversion is carried out, that is, the bearing is always kept fixed on the bearing seat 9 to prevent the gap between the bearing and the bearing seat 9 from causing uneven force on the bearing.

Claims

1. Cylindrical roller bearing with fixed pressure plate for wind turbine jacket, characterized in that: include: An outer ring, a flat retaining ring, an inner ring, a pressure plate assembly, a plurality of cylindrical rollers and a cage, wherein the cage comprises a cage seat and a retaining cover. A plurality of retaining beams are evenly arranged on one side of the retaining seat, and pockets corresponding to a plurality of rollers are arranged between each two adjacent retaining beams. A retaining cover is arranged on the retaining seat and forms a complete retaining frame with the retaining cover. Bolt holes are evenly arranged on the retaining cover corresponding to each retaining beam position, and the retaining cover is connected to the retaining seat through a plurality of bolts. The outer ring is a single rib structure, and a flat retaining ring is arranged on the end face of the outer ring opposite to the single rib position, and a roller retaining shoulder is formed at the inner diameter end of the flat retaining ring, and the surface where the outer diameter is located is arranged flush with the outer circumferential surface of the outer ring. The plurality of cylindrical rollers are all arranged to roll between the outer ring raceway and the inner ring raceway. A pressure plate assembly is arranged at any bolt hole position on the outer end face of the retaining cover, and one end edge of the pressure plate assembly covers the retaining cover area, and the other end edge extends toward the flat retaining ring and at least covers the inner diameter edge of the flat retaining ring.

2. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 1, characterized in that: The number of the pressure plate assemblies is set to 3-4, which are evenly distributed on the retaining frame cover along the circumference of the bearing.

3. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 1, characterized in that: The pressure plate assembly includes: a pressure plate and a matching fixing bolt; a pressure plate bolt hole identical to the retaining frame cover bolt hole is opened on the pressure plate, and the pressure plate is passed through the pressure plate bolt hole from the outside of the pressure plate by the fixing bolt and screwed into the bolt hole on the retaining frame cover, thereby fixing the pressure plate on the retaining frame cover.

4. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 3 is characterized in that: The pressure plate is an isosceles trapezoidal structure that is narrow at the top and wide at the bottom. The lower wide side faces the inner ring and the edge covers the inner diameter edge of the retaining frame cover. The upper narrow side faces the flat retaining ring and the narrow edge extends beyond the inner diameter edge of the flat retaining ring and is close to half of the width of the end face of the flat retaining ring; thereby, the flat retaining ring is blocked and limited by the upper narrow side area of ​​the pressure plate.

5. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 4, characterized in that: The bolt holes on the pressure plate are located towards the lower wide side area of ​​the pressure plate.

6. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 3, characterized in that: The flat retaining ring is positioned by converting the installation position of the pressure plate and fixing it to the bearing seat.

7. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 4, characterized in that: A bearing seat is arranged outside the outer ring of the bearing, the bearing is embedded and installed in the bearing seat so that the outer end face of the bearing flat retaining ring is flush with the end face of the bearing seat, and a sealing cover is arranged at the outer end of the bearing seat, which is connected to the bearing flat retaining ring by screws.

8. The cylindrical roller bearing with a fixed pressure plate for a wind turbine jacket according to claim 7, characterized in that: When the bearing is used on a machine, the inner ring is fixed to the equipment shaft and the outer ring is placed in the bearing seat. The pressure plate of the pressure plate assembly arranged on the bearing retainer cover is flipped forward or backward to achieve mirror symmetry with the original pressure plate position, so that the wide side area of ​​the pressure plate corresponds to the end face of the bearing seat. Bolt holes matching the fixing screws in the pressure plate assembly are provided on the end face of the bearing seat, and the pressure plate is fixed to the bearing seat by the fixing bolts of the pressure plate assembly, while the narrow side area of ​​the pressure plate corresponds to the outer end face of the bearing flat retaining ring to achieve the positioning of the bearing.

9. A method for assembling and disassembling a cylindrical roller bearing with a fixed pressure plate of a wind turbine jacket according to any one of claims 1 to 8, characterized in that: When the finished bearing needs to be packaged and transported, select any 3-4 bolt holes on the cage cover, and fix each pressure plate on the cage cover in sequence with fixing screws, so that the pressure plate forms a limit on the flat retaining ring, thereby completing the installation of the pressure plate; When the bearing needs to be used on the machine, the bearing fixing sleeve with the pressure plate installed is installed on the equipment shaft and embedded in the bearing seat; at this time, loosen the fixing bolts of the first pressure plate assembly, then rotate the pressure plate 180° clockwise or counterclockwise, and then tighten the fixing bolts to fix the pressure plate on the end face of the bearing seat to achieve the positioning of the pressure plate on the bearing; after completing the position conversion of the first pressure plate, convert the position of the second pressure plate according to the above operation, and so on, and finally complete the disassembly and conversion of all pressure plate assemblies step by step.

10. The method for assembling and disassembling a cylindrical roller bearing with a fixed pressure plate of a wind turbine jacket according to claim 9, characterized in that: The state of the pressure plate on the bearing retainer cover after the pressure plate installation is that the narrow side area of ​​the pressure plate presses on the flat retaining ring toward the outer diameter direction of the bearing; the state of each pressure plate after the position conversion is that the narrow side area of ​​the pressure plate presses on the flat retaining ring toward the inner diameter direction of the bearing.

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