CN218542962U - Plain bearing assemblies and wind turbines - Google Patents

Abstract

The present disclosure provides a sliding bearing assembly and a wind power generator set, the sliding bearing assembly includes a bearing seat and a plurality of bearing units, the bearing seat has an accommodation chamber; the plurality of bearing units are spaced along the circumference of the accommodation chamber Set in the housing cavity, the bearing unit includes a support plate and a steel back, the support plate is fixed on the bearing housing, the steel back is movably connected to the support plate, and the steel back The side away from the support plate is provided with a rotating shaft support surface for supporting the rotating shaft. By setting a plurality of bearing units in the accommodation cavity of the bearing seat, the plurality of bearing units are independent of each other, which is convenient for independent disassembly and assembly, and is especially suitable for disassembly on the tower. installation, thereby reducing the operation and maintenance cost of the sliding bearing assembly.

Description

Plain bearing assemblies and wind turbines

technical field

The disclosure belongs to the field of wind power generation, and in particular relates to a sliding bearing assembly and a wind power generating set.

Background technique

With the development of the wind power industry, the capacity of the unit continues to increase, which puts forward higher requirements for the carrying capacity of the main bearing. At present, rolling bearings are usually used as main bearings. As the diameter of main bearings becomes larger, more stringent requirements are placed on processing, and as the diameter of main bearings increases, the cost of rolling bearings rises sharply.

Utility model content

The main purpose of the present disclosure is to provide a sliding bearing assembly and a wind power generating set, so as to reduce the operation and maintenance cost of the wind generating set.

For the above purpose, the present disclosure provides the following technical solutions:

One aspect of the present disclosure provides a sliding bearing assembly, the sliding bearing assembly includes a bearing seat and a plurality of bearing units, the bearing seat has a housing chamber; the plurality of bearing units are spaced along the circumference of the housing chamber Set in the housing cavity, the bearing unit includes a support plate and a steel back, the support plate is fixed on the bearing seat, the steel back is movably connected to the support plate, and the steel back A rotating shaft supporting surface for supporting the rotating shaft is provided on the side away from the supporting plate.

In an exemplary embodiment of the present disclosure, the bearing unit further includes a pin shaft, the pin shaft is arranged parallel to the diameter of the rotating shaft, the pin shaft is connected between the support plate and the steel back, and the pin shaft is connected between the support plate and the steel back. The steel back is provided with a steel back installation hole, and the pin shaft is in clearance fit with the steel back installation hole.

Optionally, the support plate is provided with a support plate installation hole through which the pin shaft passes, the support plate installation hole is arranged in alignment with the steel back installation hole, and the first end of the pin shaft is aligned with the steel back installation hole. The installation hole of the support plate is interference fit, and the second end of the pin shaft is in clearance fit with the installation hole of the steel back.

Specifically, the bearing unit further includes an elastic pad supported between the support plate and the steel back, and the elastic pad is arranged symmetrically with respect to the pin axis along the circumferential direction of the rotating shaft.

Further, the pin shaft is arranged parallel to the diameter of the rotating shaft, and the pin shaft and the steel back are arranged in a misalignment along the centerline of the rotating shaft in the circumferential direction.

In another exemplary embodiment of the present disclosure, the steel back is provided with an oil inlet passage, one end of the oil inlet passage communicates with the oil pump through a pipeline, and the other end communicates with the supporting surface of the rotating shaft.

Optionally, the bearing units are arranged in pairs, and each pair of the bearing units is arranged symmetrically about the center.

Specifically, the cavity wall of the accommodating cavity of the bearing seat is recessed with an installation groove, and the side of the support plate facing away from the steel back is embedded in the installation groove.

Further, the bearing unit further includes a fixing plate, which is arranged on the axial end of the supporting plate along the rotating shaft, and the fixing plate is fixed on the bearing housing, and the supporting plate is fixed on the fixed on the board.

In an exemplary embodiment of the present disclosure, at least one of the supporting surface of the rotating shaft and the outer peripheral wall of the rotating shaft is provided with a wear-resistant layer.

Another aspect of the present disclosure provides a wind power generating set comprising the sliding bearing assembly as described above.

The sliding bearing assembly and the wind power generating set provided by the present disclosure have at least the following beneficial effects: the present disclosure arranges a plurality of bearing units in the accommodation cavity of the bearing seat, and the plurality of bearing units are independent from each other, which is convenient for independent disassembly and assembly, and is especially suitable for tower disassembly installation, thereby reducing the operation and maintenance cost of the sliding bearing assembly.

Description of drawings

The above and/or other objects and advantages of the present disclosure will become more clear through the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a structural diagram of a sliding bearing assembly provided by an exemplary embodiment of the present disclosure.

Fig. 2 is a cross-sectional view of the sliding bearing assembly in Fig. 1 .

Fig. 3 is a structural diagram of the bearing unit in Fig. 1 .

Fig. 4 is a combined state view of the supporting plate and the fixing plate in Fig. 3 .

FIG. 5 is a cross-sectional view of the bearing unit in FIG. 3 .

Explanation of reference signs;

1. Bearing seat; 2. Bearing unit;

3. Rotary shaft; 21. Support plate;

22. Steel back; 23. Pin shaft;

24. Elastic pad; 25. Fixed plate;

26. External pipeline; 27. Fasteners;

211, support plate installation hole; 221, oil inlet channel.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the embodiments of the present disclosure are limited to the embodiments set forth here. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

The present disclosure provides a wind power generating set, which includes a tower, a nacelle supported on the top of the tower, an impeller connected to the nacelle, and a generator, wherein the rotating shaft of the impeller is connected with the rotating shaft of the generator, and Under the action of wind force, the impeller will rotate and drive the generator to generate electricity.

In order to improve the service life of the rotating shaft, the wind power generating set further includes a sliding bearing assembly, which can adapt to the rotating shaft having a larger size diameter, and the manufacturing cost of the sliding bearing assembly is low. As an example, the rotating shaft may be the main shaft of the wind power generating set, but it is not limited thereto.

Referring to FIG. 1 and FIG. 2 , an exemplary embodiment of the present disclosure provides a sliding bearing assembly, the sliding bearing assembly includes a bearing housing 1 and a plurality of bearing units 2 , and the bearing housing 1 has an accommodation cavity. A plurality of bearing units 2 are disposed in the accommodation cavity at intervals along the circumferential direction of the accommodation cavity, for supporting on the circumferential outer side of the rotating shaft 3 .

In the present disclosure, a plurality of bearing units 2 are arranged in the accommodation cavity of the bearing seat 1, and the plurality of bearing units 2 are independent of each other, which is convenient for independent disassembly and assembly, and is especially suitable for disassembly and assembly on the tower, thereby reducing the operation and maintenance cost of the sliding bearing assembly.

2 to 5, specifically, the bearing unit 2 includes a support plate 21 and a steel back 22, the support plate 21 is fixed on the bearing seat 1, the steel back 22 is movably connected to the support plate 21, and the steel back 22 is away from the support One side of the plate 21 is provided with a rotating shaft supporting surface for supporting the rotating shaft 3 .

In order to increase the service life of the sliding bearing assembly, at least one of the supporting surface of the rotating shaft and the outer peripheral wall of the rotating shaft 3 is provided with a wear-resistant layer. As an example, the wear-resistant layer is disposed on the rotating shaft supporting surface of the steel back 22 , and may also be disposed on the outer peripheral wall of the rotating shaft 3 . Optionally, on the supporting surface of the steel back 22 and the rotating shaft 3, a wear-resistant layer is bonded or coated to improve the wear resistance and reduce frictional resistance of the sliding bearing assembly.

In this embodiment, the support plate 21 is fixed on the bearing seat 1, so that the steel back 22 can be movably connected to the bearing seat 1 through the support plate 21, so as to be able to adapt to the axial force, thereby improving the stability of the sliding bearing assembly. adaptability.

As an example, the support plate 21 may be connected to the bearing seat 1 through fasteners, but not limited thereto. Referring to FIG. 3 , the support plate 21 is roughly in the shape of a square plate, and the four corners of the square plate are respectively connected to the bearing housing 1 by fasteners, but not limited thereto.

Further, in order to facilitate the assembly of the support plate 21, the bearing unit 2 also includes a fixed plate 25, which is arranged on the axial end of the support plate 21 along the rotating shaft 3, and the fixed plate 25 is fixed on the bearing seat 1, and the support plate 21 is fixed on the On the fixed plate 25.

In order to improve the assembly efficiency of the sliding bearing assembly, the cavity wall of the housing cavity of the bearing housing 1 is recessed and provided with an installation groove, and the side of the support plate 21 away from the steel back 22 is embedded in the installation groove. Such setting facilitates the assembly and positioning of the support plate 21, thereby improving the assembly efficiency of the sliding bearing assembly.

Continuing to refer to FIG. 3 , as an example, the fixing plate 25 can be pre-fixed on the inner wall of the bearing seat 1 by fasteners, the fixing plate 25 can be used as an axial limiter, and the fixing plate 25 can be positioned at the radial direction of the rotating shaft 3 The size is matched with the supporting plate 21 to prevent the fixing plate 25 from interfering with the steel back 22 . Further, the side of the fixed plate 25 facing the support plate 21 can be provided with a groove matching the axial end of the support plate 21 on the rotating shaft 3, and the end of the support plate 21 can be inserted into the groove, so that The support plate 21 is stably connected to the fixing plate 25, which improves the connection reliability of the support plate 21.

In order to further improve the connection reliability of the support plate 21 and avoid axial movement of the support plate 21 relative to the bearing housing 1 along the rotating shaft 3, the supporting plate 21 is provided with fasteners on both sides of the circumferential direction of the rotating shaft 3 27 , the fastener 27 extends substantially along the axial direction of the rotating shaft 3 , and the fastener 27 is connected between the supporting plate 21 and the fixing plate 25 . In order to facilitate assembly and disassembly, the nut end of the fastener 27 can be exposed to facilitate operation and improve the convenience of assembly and disassembly.

Optionally, the support plate 21 and the fixing plate 25 may also be fixedly connected by means of adhesive connection or the like, but not limited thereto.

Specifically, each support plate 21 has a corresponding installation groove on the bearing seat 1. During the assembly process, the fixing plate 25 can be connected to the bearing seat 1 with two fasteners (such as but not limited to screws). Fix, then push the supporting plate 21 into the groove of the fixing plate 25, and install the remaining fasteners 27 on the supporting plate 21, so that the supporting plate 21 is connected to the fixing plate 25 and the bearing seat 1.

Continuing to refer to Fig. 2 to Fig. 5, the bearing unit 2 also includes a pin shaft 23, the pin shaft 23 is arranged parallel to the diameter of the rotating shaft 3, the pin shaft 23 is connected between the support plate 21 and the steel back 22, and the steel back 22 is provided with a The board installation hole 211 is set in alignment with the steel back installation hole, and the pin shaft 23 is in clearance fit with the steel back installation hole. In this embodiment, the pin shaft 23 is mainly used to connect the steel back 22 and the support plate 21 , and to limit the position of the steel back 22 in the circumferential direction of the rotating shaft 3 , so as to prevent the steel back 22 from accidentally detaching from the support plate 21 .

As an example, the support plate 21 is provided with a support plate installation hole 211 for the pin shaft 23 to pass through, and the first end of the pin shaft 23 is interference fit with the support plate installation hole 211 to prevent the pin shaft 23 from accidentally moving relative to the support plate 21. The connection reliability between the steel back 22 and the support plate 21 is improved. It can be understood that the pin shaft 23 is fixed on the support plate 21, and the steel back 22 can swing around the circumference of the pin shaft 23 relative to the pin shaft 23 and move along its axial direction relative to the pin shaft 23 to improve sliding Adaptability of bearing assemblies, but not limited to.

Further, the second end of the pin shaft 23 is in clearance fit with the installation hole of the steel back, so that the steel back 22 can be flexibly connected with respect to the support plate 21 . As an example, the steel back installation hole can be a blind hole, and the end of the second end of the pin shaft 23 is spaced from the bottom of the steel back installation hole, so that the steel back 22 can be positioned relative to the pin shaft 23 along the axial direction of the pin shaft 23. Move to adapt to different working conditions. Further, the end of the second end of the pin shaft 23 is spaced apart from the bottom of the steel back installation hole, and when the steel back 22 bears the radial force of the rotating shaft 3, the pin shaft 23 can be prevented from being subjected to an axial force. Thereby the service life of the pin shaft 23 is improved.

As an example, the steel back 22 and the support plate 21 are respectively metal parts to have higher rigidity.

In order to improve the service life of the sliding bearing assembly and avoid wear caused by rigid contact between the steel back 22 and the support plate 21, the bearing unit 2 also includes an elastic pad 24, which is supported between the support plate 21 and the steel back 22, elastically The pads 24 are arranged symmetrically with respect to the pin shaft 23 along the circumferential direction of the rotating shaft 3 . In this way, by disposing the elastic pad 24 between the support plate 21 and the steel back 22, the steel back 22 remains in contact with the outer peripheral wall of the rotating shaft 3, thereby improving the reliability of the sliding bearing assembly. Further, the elastic pad 24 is deformed under pressure, so that the rotating shaft 3 has a predetermined travel space in the radial direction, thereby improving the adaptability of the sliding bearing assembly. As an example, the elastic pad 24 can be made of polymer material, and the arrangement of the elastic pad 24 improves the sensitivity of the bearing stiffness to the formation of the dynamic pressure oil film of the sliding bearing.

As an example, the pin shaft 23 is parallel to the diameter of the rotating shaft 3 and is offset from the diameter of the rotating shaft 3 , that is, the pin shaft 23 is offset relative to the steel back 22 along the center line of the rotating shaft 3 . The pin shaft 23 has a certain offset value along the rotation direction of the rotating shaft 3, and the offset value enables the sliding bearing assembly to better form a dynamic pressure oil film. Further, the pin shaft 23 is arranged on the centerline of the elastic pad 24 along the circumferential direction of the rotating shaft 3 , that is, the elastic pad 24 is not centrally arranged relative to the steel back 22 , but it is not limited thereto.

In order to further improve the reliability of the sliding bearing assembly and maintain the smooth rotation of the rotating shaft 3, the steel back 22 is provided with an oil inlet passage 221, one end of the oil inlet passage 221 communicates with the oil pump through the external pipeline 26, and the other end communicates with the supporting surface of the rotating shaft connected. Such an arrangement makes it easy to form a dynamic pressure oil film between the rotating shaft support surface of the steel back 22 and the outer peripheral wall of the rotating shaft 3, which improves the smoothness of the rotating shaft 3 rotation, and on the other hand, also improves the stability of the rotating shaft 3 and the sliding bearing assembly. service life, reducing operation and maintenance costs.

Each steel back 22 is lubricated independently, the lubricating oil is sprayed into the oil channel of the steel back 22 through the oil inlet channel 221, and then flows into the supporting surface of the rotating shaft that rubs against the rotating shaft 3, and then flows from the bearing seat 1 under the action of gravity outflow to achieve the purpose of circulating oil supply.

As an example, the bearing units 2 are arranged in pairs, and each pair of bearing units 2 is arranged symmetrically about the center. In this way, the sliding bearing assembly can bear the force along the radial direction of the rotating shaft 3, which improves the applicability of the sliding bearing assembly.

In describing the present disclosure, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the present disclosure.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

In the description of the present disclosure, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can also be a communication connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication or connection between two components. Interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure in specific situations.

The features, structures, or characteristics described in this disclosure may be combined in any suitable manner in one or more embodiments. In the description above, numerous specific details were provided in order to give a thorough understanding of embodiments of the present disclosure. However, one skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or that other methods, components, materials, etc. may be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

Claims (11)

1. A sliding bearing assembly, characterized in that the sliding bearing assembly comprises: The bearing seat (1) has an accommodation cavity; A plurality of bearing units (2) are arranged in the accommodation chamber at intervals along the circumference of the accommodation chamber, the bearing unit (2) includes a support plate (21) and a steel back (22), and the support plate ( 21) fixed on the bearing seat (1), the steel back (22) is movably connected to the support plate (21), and the steel back (22) is away from the support plate (21) One side is provided with a rotating shaft supporting surface for supporting the rotating shaft (3). 2. The sliding bearing assembly according to claim 1, characterized in that, the bearing unit (2) further comprises a pin shaft (23), and the pin shaft (23) is arranged parallel to the diameter of the rotating shaft (3) , the pin (23) is connected between the support plate (21) and the steel back (22), the steel back (22) is provided with a steel back installation hole, the pin (23) and The installation holes of the steel back are clearance fit. 3. The sliding bearing assembly according to claim 2, characterized in that, the support plate (21) is provided with a support plate installation hole (211) through which the pin shaft (23) passes, and the support plate is installed The hole (211) is arranged in alignment with the mounting hole of the steel back, the first end of the pin (23) is interference fit with the mounting hole (211) of the support plate, and the second end of the pin (23) The end is clearance fit with the mounting hole of the steel back. 4. The sliding bearing assembly according to claim 2, characterized in that, the bearing unit (2) further comprises an elastic pad (24) supported between the support plate (21) and the steel back (22) Between, the elastic pad (24) is arranged symmetrically with respect to the pin shaft (23) along the circumferential direction of the rotating shaft (3). 5. The sliding bearing assembly according to claim 2, characterized in that, the pin shaft (23) is arranged parallel to the diameter of the rotating shaft (3), and the pin shaft (23) and the steel back (22) Displaced along the center line in the circumferential direction of the rotating shaft (3). 6. The sliding bearing assembly according to any one of claims 1-5, characterized in that, the steel back (22) is provided with an oil inlet passage (221), and one end of the oil inlet passage (221) passes through The external pipeline (26) communicates with the oil pump, and the other end communicates with the supporting surface of the rotating shaft. 7. The sliding bearing assembly according to claim 6, characterized in that the bearing units (2) are arranged in pairs, and each pair of bearing units (2) is arranged symmetrically about the center. 8. The sliding bearing assembly according to claim 6, characterized in that, the cavity wall of the accommodating cavity of the bearing seat (1) is recessed and provided with a mounting groove, and the support plate (21) is away from the steel back (22) ) is embedded in the installation groove. 9. The sliding bearing assembly according to claim 6, characterized in that, the bearing unit (2) further comprises a fixing plate (25), which is arranged on the side of the supporting plate (21) along the rotating shaft (3). The axial end, and the fixed plate (25) is fixed on the bearing seat (1), and the support plate (21) is fixed on the fixed plate (25). 10. The sliding bearing assembly according to claim 6, characterized in that at least one of the supporting surface of the rotating shaft and the outer peripheral wall of the rotating shaft (3) is provided with a wear-resistant layer. 11. A wind power generator, characterized in that the wind power generator comprises the sliding bearing assembly according to any one of claims 1-10.

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