High-speed shaft disassembly box body structure for wind power gear box

Abstract

The utility model discloses a high-speed shaft disassembly box body structure for a wind power gear box, which comprises a high-speed shaft, a main bearing sleeved on the periphery of one end of the high-speed shaft, a main gear sleeved on the middle part of the high-speed shaft, a bearing seat sleeved on the periphery of the main bearing, and a box body arranged at one end of the bearing seat, a bearing step is arranged on the periphery of the high-speed shaft and extends to the baffle groove, the main bearing comprises a bearing inner ring, a bearing outer ring arranged on the periphery of the bearing inner ring in a sleeving mode and a roller arranged between the bearing inner ring and the bearing outer ring, one end of the bearing outer ring is limited through a first baffle, and the other end of the bearing outer ring is limited through a second baffle. The bearing inner ring sleeves the periphery of the bearing step, one end of the bearing inner ring abuts against the end face of the bearing step, the other end of the bearing inner ring is limited through a third baffle, the box body is fixed to one end of the bearing seat, and an observation window is formed in the top of the box body and sealed through a sealing cover plate; the left space of the main bearing is utilized, and the axial size is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power gearbox housings, and particularly relates to a high-speed shaft disassembly housing structure for a wind power gearbox. Background Art

[0002] The gearbox in a wind turbine is an important mechanical component, and its main function is to transmit the power generated by the wind wheel under the action of wind force to the generator and enable it to obtain the corresponding rotational speed. In actual working conditions, since the unit is installed at the air inlets such as mountains, wildernesses, beaches, and islands, it is affected by the irregular variable-direction and variable-load wind forces and the impact of strong gusts, and endures the influence of extreme heat and cold and extreme temperature differences all year round. In addition, due to the inconvenient transportation in the natural environment where it is located, the gearbox is installed in a narrow space at the top of the tower. Once a failure occurs, it is very difficult to repair. Therefore, much higher requirements are put forward for its reliability and service life than those of general machinery. For example, for the requirements of component materials, in addition to the mechanical properties under normal conditions, it should also have characteristics such as cold brittleness resistance at low temperatures, and it should also ensure the stable operation of the gearbox and prevent vibration and impact. The high-speed shaft in a wind power gearbox is an important structure.

[0003] In the prior art, as Figure 2 shown, for the maintenance of the high-speed shaft 12 of the wind power gearbox and the inner ring 11 of the bearing on the upwind side on the wind turbine, it is usually disassembled axially from the downwind side. Due to the shielding of the large gear 14, a space for disassembling the outer ring of the bearing needs to be reserved between the left end of the large gear 14 and the right end of the bearing 10 in the axial direction for the outer ring and rollers 10 of the bearing on the upwind side of the high-speed shaft. When disassembling the outer ring and rollers 10 of the bearing, first disassemble the retaining ring 13 through the sight hole cover 15 on the housing, and then take out the outer ring and rollers 10 of the bearing through the sight hole cover 15. This housing structure increases the axial dimension. Thus, not only does it lead to an increase in material cost, but also it increases a part of the occupied space of the wind power gearbox. In summary, there is an urgent need for a compact housing mechanism that is convenient for disassembling the high-speed shaft. Summary of the Utility Model

[0004] To solve some or all of the technical problems existing in the above prior art, the utility model provides a high-speed shaft disassembly housing structure for a wind power gearbox, which includes a high-speed shaft, a main bearing sleeved on the outer periphery of one end of the high-speed shaft, a main gear sleeved on the middle part of the high-speed shaft, a bearing seat sleeved on the outer periphery of the main bearing, and a housing arranged at one end of the bearing seat, wherein:

[0005] A baffle groove is opened at the end of the high-speed shaft, and a bearing step is opened on the outer periphery of the high-speed shaft, and the bearing step extends to the baffle groove;

[0006] The main bearing includes an inner bearing ring, an outer bearing ring sleeved on the outer periphery of the inner bearing ring, and rollers arranged between the inner bearing ring and the outer bearing ring. One end of the outer bearing ring is limited by a first baffle, and the other end is limited by a second baffle. The first baffle is fixed to one end of the bearing seat through a first fastener, and the second baffle is fixed to the other end of the bearing seat through a second fastener. The outer bearing ring abuts against the inner wall of the bearing seat. The inner bearing ring is sleeved on the outer periphery of the bearing step. One end of the inner bearing ring abuts against the end face of the bearing step, and the other end is limited by a third baffle. The third baffle is fixed in the baffle groove through a third fastener. The box body is fixed to the end of the bearing seat far from the main gear through the first fastener. An observation window is opened at the top of the box body, and the observation window is sealed by a sealing cover plate.

[0007] Further, in the above-mentioned high-speed shaft disassembly box body structure for a wind power gearbox, an external thread is provided on the outer periphery of the middle part of the high-speed shaft, and the external thread is arranged in the inner wall of the main gear.

[0008] As a specific implementation manner, in the above-mentioned high-speed shaft disassembly box body structure for a wind power gearbox, the first fastener, the second fastener, and the third fastener are all fastening bolts.

[0009] Further, in the above-mentioned high-speed shaft disassembly box body structure for a wind power gearbox, the first fasteners are uniformly distributed along the circumferential direction of the first baffle.

[0010] Further, in the above-mentioned high-speed shaft disassembly box body structure for a wind power gearbox, the second fasteners are uniformly distributed along the circumferential direction of the second baffle.

[0011] Further, in the above-mentioned high-speed shaft disassembly box body structure for a wind power gearbox, the third fasteners are uniformly distributed along the circumferential direction of the third baffle.

[0012] The high-speed shaft disassembly box body structure for a wind power gearbox of the present utility model has the following advantages and beneficial effects:

[0013] The mechanism of this device is simple and compact, easy to disassemble and assemble, utilizes the space on the left side of the main bearing, reduces the space between the main gear and the main bearing, and shortens the axial dimension of the high-speed shaft. Thereby, the material cost is saved, a part of the occupied space of the wind power gearbox is reduced, and during the disassembly process of the outer bearing ring and the rollers, the shielding of the main gear is avoided, making the disassembly and assembly operations simpler and more convenient. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the high-speed shaft disassembly box structure for a wind power gearbox of the present invention;

[0016] Figure 2 is the box structure of a wind power gearbox in the prior art.

[0017] Explanation of reference numerals:

[0018] 1 - high-speed shaft, 2 - main bearing, 21 - bearing inner ring, 22 - bearing outer ring, 23 - roller, 3 - main gear, 4 - bearing seat, 5 - box body, 51 - sealing cover plate, 6 - first baffle, 7 - second baffle, 8 - third baffle, 10 - bearing roller, 11 - inner ring, 12 - shaft body, 13 - retaining ring, 14 - large gear, 15 - sight hole cover. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Such as Figure 1As shown in the figure, the high-speed shaft disassembly box structure for a wind power gearbox of the present utility model includes a high-speed shaft 1, a main bearing 2 sleeved on the outer periphery of one end of the high-speed shaft 1, a main gear 3 sleeved on the middle part of the high-speed shaft 1, a bearing housing 4 sleeved on the outer periphery of the main bearing 2, and a box body 5 arranged at one end of the bearing housing 4. Among them, a baffle groove (not shown in the figure) is opened at the end of the high-speed shaft 1, and a bearing step (not shown in the figure) is opened on the outer periphery of the high-speed shaft 1, and the bearing step extends to the baffle groove; the main bearing 2 includes a bearing inner ring 21, a bearing outer ring 22 sleeved on the outer periphery of the bearing inner ring 21, and rollers 23 arranged between the bearing inner ring 21 and the bearing outer ring 22. The inner diameter of the bearing inner ring 21 matches the outer diameter of the bearing step, and the outer diameter of the bearing outer ring 22 matches the inner diameter of the bearing housing 4. One end of the bearing outer ring 22 is limited by a first baffle 6, and the other end is limited by a second baffle 7. The axial position of the bearing outer ring 22 is restricted by the first baffle 6 and the second baffle 7. The first baffle 6 is fixed to one end of the bearing housing 4 through a first fastener, and the second baffle 7 is fixed to the other end of the bearing housing 4 through a second fastener. The bearing outer ring 22 abuts against the inner wall of the bearing housing 4. The bearing inner ring 21 is sleeved on the outer periphery of the bearing step, one end of the bearing inner ring 21 abuts against the end face of the bearing step, and the other end is limited by a third baffle 8. The third baffle 8 is fixed in the baffle groove through a third fastener. The axial position of the bearing inner ring 21 is restricted by the third baffle 8 and the bearing step. The box body 5 is fixed to the end of the bearing housing 4 away from the main gear 3 through a first fastener. The first fastener for fixing the box body 5 sequentially passes through the box body 5, the first baffle 6, and penetrates into the bearing housing 4. An observation window (not shown in the figure) is opened at the top of the box body 5, and the observation window is sealed by a sealing cover plate 51. The structure between the observation window and the sealing cover plate 51 is detachable. The box body 5 is a hollow structure as a whole.

[0021] Further, in the high-speed shaft disassembly box structure for a wind power gearbox of the present utility model, an external thread is provided on the outer periphery of the middle part of the high-speed shaft 1, and the external thread is arranged in the inner wall of the main gear 3. More specifically, an internal thread matching the external thread is provided in the inner wall of the main gear 3.

[0022] As a specific implementation manner, in the high-speed shaft disassembly box structure for a wind power gearbox of the present utility model, the first fastener, the second fastener, and the third fastener are all fastening bolts. Of course, the first fastener, the second fastener, and the third fastener can also be other fasteners such as fastening screws, which are not limited herein as long as the respective fastening effects are satisfied.

[0023] Further, in the high-speed shaft disassembly box structure for a wind power gearbox of the present utility model, the first fasteners are uniformly distributed along the circumferential direction of the first baffle 6. With such an arrangement, it is ensured that the impact force received on the first baffle 6 is balanced, making the operation of the main bearing 2 more stable.

[0024] Further, in the high-speed shaft disassembly housing structure for a wind power gearbox of the present utility model, the second fasteners are evenly distributed circumferentially along the second baffle 7. With such an arrangement, it is ensured that the impact force received by the second baffle 7 is balanced, enabling the main bearing 2 to operate more smoothly.

[0025] Further, in the high-speed shaft disassembly housing structure for a wind power gearbox of the present utility model, the third fasteners are evenly distributed circumferentially along the third baffle 8. With such an arrangement, it is ensured that the impact force received by the third baffle 8 is balanced, enabling the main bearing 2 to operate more smoothly.

[0026] The working principle of the high-speed shaft disassembly housing structure for a wind power gearbox of the present utility model is as follows:

[0027] When it is necessary to disassemble the bearing outer ring 22 and the rollers 23 due to maintenance problems, first remove the sealing cover plate 51. Then, insert a tool into the housing 5 through the observation window, unscrew the first fasteners, and remove the first baffle 6. Subsequently, disassemble the bearing outer ring 22 and the rollers 23, and finally take them out through the observation window.

[0028] In summary, compared with the prior art, the high-speed shaft disassembly housing structure for a wind power gearbox of the present utility model has the following advantages and beneficial effects:

[0029] The structure of this device is simple and compact, easy to disassemble and assemble. It utilizes the space on the left side of the main bearing 2, reduces the space between the main gear 3 and the main bearing 2, and shortens the axial dimension of the high-speed shaft 1. Furthermore, it saves material costs, reduces the occupied space of a part of the wind power gearbox, and avoids the obstruction of the main gear 3 during the disassembly and assembly process of the bearing outer ring 22 and the rollers 23, making the disassembly and assembly operations simpler and more convenient.

[0030] It should be noted that in this article, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "upper", "lower", etc. are all referred to the placement state shown in the drawings.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some of the technical features can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A high-speed shaft disassembly box structure for a wind power gearbox, characterized in that: The high-speed shaft disassembly box structure for a wind power gearbox comprises a high-speed shaft, a main bearing sleeved on the outer periphery of one end of the high-speed shaft, a main gear sleeved on the middle of the high-speed shaft, a bearing seat sleeved on the outer periphery of the main bearing, and a box body arranged at one end of the bearing seat, wherein: The end of the high-speed shaft is provided with a baffle groove, the outer periphery of the high-speed shaft is provided with a bearing step, and the bearing step extends to the baffle groove; The main bearing comprises a bearing inner ring, a bearing outer ring sleeved on the outer circumference of the bearing inner ring, and a roller arranged between the bearing inner ring and the bearing outer ring. One end of the bearing outer ring is limited by a first baffle, and the other end is limited by a second baffle. The first baffle is fixed to one end of the bearing seat by a first fastener, and the second baffle is fixed to the other end of the bearing seat by a second fastener. The bearing outer ring abuts against the inner wall of the bearing seat, the bearing inner ring is sleeved on the outer circumference of the bearing step, one end of the bearing inner ring abuts against the end face of the bearing step, and the other end is limited by a third baffle, and the third baffle is fixed in the baffle groove by a third fastener. The housing is fixed to the end of the bearing seat away from the main gear by the first fastener, and an observation window is opened on the top of the housing, and the observation window is sealed by a sealing cover plate.

2. The high-speed shaft disassembly box structure for a wind power gearbox according to claim 1 is characterized in that: An external thread is provided on the outer periphery of the middle portion of the high-speed shaft, and the external thread is arranged in the inner wall of the main gear.

3. The high-speed shaft disassembly box structure for a wind power gearbox according to claim 1, characterized in that: The first fastener, the second fastener, and the third fastener are all fastening bolts.

4. The high-speed shaft disassembly box structure for a wind power gearbox according to claim 1, characterized in that: The first fasteners are evenly distributed along the circumference of the first baffle.

5. The high-speed shaft disassembly box structure for a wind power gearbox according to claim 1, characterized in that: The second fasteners are evenly distributed along the circumference of the second baffle.

6. The high-speed shaft disassembly box structure for a wind power gearbox according to claim 1, characterized in that: The third fasteners are evenly distributed along the circumference of the third baffle.

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