High speed stage subassembly and gearbox

Abstract

The utility model belongs to the technical field of gear boxes, and discloses a high-speed-level subassembly and a gear box, the high-speed-level subassembly comprises a high-speed-level box body and a high-speed gear shaft, and the high-speed gear shaft is arranged in the high-speed-level box body; wherein the high-speed-level box body comprises a mounting hole, the high-speed gear shaft comprises a first end part and a second end part, the first end part is arranged in the high-speed-level box body, and the second end part extends out of the mounting hole; a gear groove is formed in the hole wall of the mounting hole and is matched with a gear of the high-speed gear shaft, so that the gear of the high-speed gear shaft can be arranged in the gear groove in a penetrating manner; according to the high-speed gear shaft system, the gear of the high-speed gear shaft can penetrate through the gear groove when the high-speed gear shaft system needs to be dismounted, so that the high-speed gear shaft can be dismounted even if the minimum inner diameter of the mounting hole of the high-speed box body is smaller than the diameter of the addendum circle of the gear of the high-speed gear shaft, the maintainability of the mounted high-speed gear shaft is met, and the service life of the high-speed gear shaft is prolonged. And the disassembly is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes, in particular to a high-speed stage assembly and a gearbox. Background Art

[0002] As a clean energy source, wind power has been gradually recognized and utilized in recent years. Wind power generation equipment often adopts double-fed or semi-direct drive wind turbines. Among them, a speed-increasing gearbox is an essential component. Therefore, how to reasonably design and arrange the gearbox structure is particularly crucial.

[0003] Currently, for double-fed wind turbines, since the high-speed bearing bears a large load, the high-speed shaft often needs to be pulled out to achieve the maintainability of installing the speed-increasing gearbox structure on the wind turbine. In the existing speed-increasing gearboxes, the opening size of the box body is larger than the outside diameter of the gear on the high-speed shaft. Therefore, the disassembly of the high-speed shaft is more convenient and fast. However, due to the change of actual requirements, there are also some speed-increasing gearboxes in which the outside diameter of the gear on the high-speed shaft exceeds the shoulder size of the bearing, that is, the minimum inner diameter size of the gearbox for installing the high-speed shaft is smaller than the outside diameter of the gear on the high-speed shaft, resulting in the inability to pull out the high-speed shaft and greatly reducing the maintainability of the high-speed shaft.

[0004] Therefore, there is an urgent need for a high-speed stage assembly and a gearbox to solve the above technical problems. Summary of the Utility Model

[0005] An object of the utility model is to provide a high-speed stage assembly, which can facilitate the disassembly, installation and maintenance of the high-speed gear shaft system and improve the maintainability of the high-speed gear shaft system.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A high-speed stage assembly, the high-speed stage assembly includes a high-speed stage box body and a high-speed gear shaft, and the high-speed gear shaft is arranged in the high-speed stage box body; wherein,

[0008] The high-speed stage box body includes a mounting hole, the high-speed gear shaft includes a first end and a second end, the first end is arranged in the high-speed stage box body, and the second end extends out of the mounting hole; a gear groove is provided on the hole wall of the mounting hole, and the gear groove is matched with the gear of the high-speed gear shaft so that the gear of the high-speed gear shaft can pass through the gear groove.

[0009] Optionally, the outside diameter of the gear groove is larger than the maximum outside diameter of the tooth tip circle of the high-speed gear shaft; the inside diameter of the gear groove is larger than the maximum outside diameter of the tooth root circle of the high-speed gear shaft.

[0010] Optionally, the tooth profile shape of the above gear groove is the same as that of the gear on the above high-speed gear shaft.

[0011] Optionally, the above mounting hole includes a mounting portion and a shoulder, the inner diameter of the shoulder is smaller than the inner diameter of the mounting portion, and the gear groove is formed on the shoulder.

[0012] Optionally, two first bearings are further provided on the above high-speed gear shaft, the two first bearings are oppositely arranged between the inner wall of the mounting portion and the outer wall of the high-speed gear shaft, and one side of the first bearing abuts against the shoulder, and the first bearing is used for bearing the axial force of the high-speed gear shaft.

[0013] Optionally, a second bearing is provided between the outer wall of the first end portion and the inner wall of the high-speed stage housing, and the second bearing is used for bearing the radial force of the high-speed gear shaft.

[0014] Optionally, the first bearing is a tapered roller bearing, and / or the second bearing is a cylindrical roller bearing.

[0015] Optionally, the gear on the high-speed gear shaft is a spur gear, and the groove shape of the gear groove is a spur gear shape.

[0016] Optionally, the gear on the high-speed gear shaft is a helical gear or a spiral bevel gear, and the groove shape of the gear groove is a helical gear shape.

[0017] An object of the present utility model is to provide a gearbox, which can facilitate the disassembly, installation and maintenance of the high-speed gear shaft system and improve the maintainability of the high-speed gear shaft system.

[0018] To achieve this purpose, the present utility model adopts the following technical solutions:

[0019] A gearbox, including a low-speed stage assembly and the above high-speed stage assembly, and a low-speed gear train in the low-speed stage assembly is in transmission connection with the high-speed gear shaft in the high-speed stage assembly.

[0020] Advantages of the present utility model:

[0021] The present utility model provides a high-speed stage assembly and a gearbox. By providing a gear groove on the hole wall of the mounting hole of the high-speed stage housing, and the gear groove is matched with the gear on the high-speed gear shaft, when the shaft system of the high-speed gear shaft needs to be disassembled, the gear on the high-speed gear shaft can pass through the gear groove, so that even when the minimum inner diameter of the mounting hole of the high-speed stage housing is smaller than the tip circle diameter of the gear on the high-speed gear shaft, the high-speed gear shaft can be disassembled, meeting the maintainability after the high-speed gear shaft is installed, and the disassembly is more convenient. Description of the Drawings

[0022] Figure 1It is a schematic structural diagram of the high-speed stage assembly provided by the specific embodiment of the present utility model;

[0023] Figure 2 is Figure 1 the sectional view at A-A in

[0024] Figure 3 is Figure 1 the sectional view at B-B in

[0025] In the figure:

[0026] 10. High-speed stage housing; 11. Mounting hole; 111. Mounting part; 112. Shoulder; 12. Gear groove;

[0027] 20. High-speed gear shaft; 21. Gear; 211. Addendum circle; 212. Dedendum circle; 22. First end; 23. Second end;

[0028] 30. First bearing; 40. Second bearing. Specific embodiment

[0029] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of 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 situations.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] The following refers to Figures 1 to 3 to introduce the high-speed stage assembly and gearbox provided by the present utility model.

[0034] Please refer to Figures 1 to 3 , this embodiment provides a high-speed stage assembly. The high-speed stage assembly includes a high-speed stage housing 10 and a high-speed gear shaft 20. The high-speed gear shaft 20 is disposed within the high-speed stage housing 10. Among them, the high-speed stage housing 10 includes a mounting hole 11, and the high-speed gear shaft 20 includes a first end 22 and a second end 23. The first end 22 is disposed within the high-speed stage housing 10, and the second end 23 extends out of the mounting hole 11. The hole wall of the mounting hole 11 is provided with a gear groove 12, and the gear groove 12 is engaged with the gear 21 of the high-speed gear shaft 20, so that the gear 21 of the high-speed gear shaft 20 can pass through the gear groove 12.

[0035] In the high-speed stage assembly of this embodiment, by providing the gear groove 12 on the hole wall of the mounting hole 11 of the high-speed stage housing 10, and the gear groove 12 is engaged with the gear 21 of the high-speed gear shaft 20, when it is necessary to disassemble the shafting of the high-speed gear shaft 20, the gear 21 of the high-speed gear shaft 20 can pass through the gear groove 12. Thus, even when the minimum inner diameter of the mounting hole 11 of the high-speed stage housing 10 is smaller than the diameter of the addendum circle 211 of the gear 21 of the high-speed gear shaft 20, the high-speed gear shaft 20 can still be disassembled, meeting the maintainability after the high-speed gear shaft 20 is installed, and the disassembly is more convenient.

[0036] Optionally, the tooth shape of the gear groove 12 is the same as the tooth shape of the gear 21 of the high-speed gear shaft 20 to achieve the engagement between the two, so that the gear 21 on the high-speed gear shaft 20 can pass through the gear groove 12 and realize its own disassembly.

[0037] In some alternative embodiments, the gear 21 of the high-speed gear shaft 20 is a spur gear, and the groove shape of the gear groove 12 is a spur gear shape, which can achieve the same shape of the two and enable the two to be disassembled in cooperation.

[0038] In some alternative embodiments, the gear 21 of the high-speed gear shaft 20 is a helical gear or a spiral bevel gear, and the groove shape of the gear groove 12 is in the shape of a helical gear, so that the shapes of the two can be the same, enabling the two to be fitted and disassembled. Exemplarily, when the gear 21 of the high-speed gear shaft 20 is a spiral bevel gear, although its outer peripheral surface is conical, the shape of the teeth is still helical. Therefore, setting the groove type of the gear groove 12 to the shape of a helical gear can also achieve the threading of the spiral bevel gear.

[0039] Specifically, the outer diameter of the gear groove 12 is greater than the maximum diameter of the addendum circle 211 of the high-speed gear shaft 20; the inner diameter of the gear groove 12 is greater than the maximum diameter of the dedendum circle 212 of the high-speed gear shaft 20, which can ensure that the gear 21 on the high-speed gear shaft 20 can pass through the gear groove 12, thereby realizing the disassembly of the high-speed gear shaft 20. Please refer to Figure 2 and Figure 3 , Exemplarily, the outer diameter of the gear groove 12 is D2, the maximum diameter of the addendum circle 211 of the high-speed gear shaft 20 is D1, the inner diameter of the gear groove 12 is D4, and the maximum diameter of the dedendum circle 212 of the high-speed gear shaft 20 is D3, where D2 > D1 and D4 > D3.

[0040] In some alternative embodiments, the mounting hole 11 includes a mounting portion 111 and a shoulder 112. The inner diameter of the shoulder 112 is smaller than the inner diameter of the mounting portion 111, and the gear groove 12 is formed on the shoulder 112. That is, the inner diameter of the shoulder 112 may be smaller than the diameter of the addendum circle 211 of the high-speed gear shaft 20. Therefore, the gear groove 12 is formed at the shoulder 112, and the setting of the shape of the gear groove 12 can not only achieve the function of the shoulder 112 but also provide a passage for the gear 21 of the high-speed gear shaft 20 to pass through.

[0041] In some embodiments, two first bearings 30 are further provided on the high-speed gear shaft 20. The two first bearings 30 are oppositely arranged between the inner wall of the mounting portion 111 and the outer wall of the high-speed gear shaft 20, and one side of the first bearing 30 abuts against the shoulder 112. The first bearing 30 is used to bear the axial force of the high-speed gear shaft 20, so that the high-speed gear shaft 20 can be better axially fitted on the high-speed stage housing 10.

[0042] Optionally, the first bearing 30 is a tapered roller bearing, which can bear both radial loads and axial loads, and the two tapered roller bearings cooperate to have better axial load bearing capacity.

[0043] In some embodiments, a second bearing 40 is provided between the outer wall of the first end 22 and the inner wall of the high-speed stage housing 10. The second bearing 40 is used to bear the radial force of the high-speed gear shaft 20, so that the high-speed gear shaft 20 can be better radially fitted on the high-speed stage housing 10.

[0044] Optionally, the second bearing 40 is a cylindrical roller bearing, which has a large radial load capacity and is suitable for heavy load, impact load and high-speed rotation conditions.

[0045] This embodiment also provides a gearbox, which includes a low-speed stage assembly and the high-speed stage assembly described in any of the above solutions. The low-speed gear train in the low-speed stage assembly is drivingly connected to the high-speed gear shaft 20 in the high-speed stage assembly. The operation of the fan can be realized through this gearbox. At the same time, when it is necessary to remove the high-speed stage shaft system during maintenance, it is also relatively convenient, improving the maintainability of the gearbox.

[0046] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. High-speed stage installation, characterized in that: The high-speed stage assembly comprises a high-speed stage housing (10) and a high-speed gear shaft (20), wherein the high-speed gear shaft (20) is arranged in the high-speed stage housing (10); wherein: The high-speed housing (10) comprises a mounting hole (11); the high-speed gear shaft (20) comprises a first end (22) and a second end (23); the first end (22) is arranged in the high-speed housing (10), and the second end (23) protrudes from the mounting hole (11); a gear groove (12) is provided on the hole wall of the mounting hole (11); the gear groove (12) cooperates with the gear (21) of the high-speed gear shaft (20) so that the gear (21) of the high-speed gear shaft (20) can be inserted into the gear groove (12).

2. The high-speed stage assembly according to claim 1, characterized in that: The outer diameter of the gear groove (12) is greater than the maximum diameter of the tooth top circle (211) of the high-speed gear shaft (20); and the inner diameter of the gear groove (12) is greater than the maximum diameter of the tooth root circle (212) of the high-speed gear shaft (20).

3. The high-speed stage assembly according to claim 1, characterized in that: The tooth shape of the gear groove (12) is the same as the tooth shape of the gear (21) of the high-speed gear shaft (20).

4. The high-speed stage assembly according to claim 1, characterized in that: The mounting hole (11) comprises a mounting portion (111) and a stop shoulder (112); the inner diameter of the stop shoulder (112) is smaller than the inner diameter of the mounting portion (111); and the gear groove (12) is formed on the stop shoulder (112).

5. The high-speed stage assembly according to claim 4, characterized in that: The high-speed gear shaft (20) is also provided with two first bearings (30), which are relatively arranged between the inner wall of the mounting portion (111) and the outer wall of the high-speed gear shaft (20), and one side of the first bearing (30) is in contact with the shoulder (112), and the first bearing (30) is used to bear the axial force of the high-speed gear shaft (20).

6. The high-speed stage assembly according to claim 5, characterized in that: A second bearing (40) is provided between the outer wall of the first end portion (22) and the inner wall of the high-speed stage housing (10), and the second bearing (40) is used to bear the radial force of the high-speed gear shaft (20).

7. The high-speed stage assembly according to claim 6, characterized in that: The first bearing (30) is a tapered roller bearing, and / or the second bearing (40) is a cylindrical roller bearing.

8. The high-speed stage assembly according to any one of claims 1 to 7, characterized in that: The gear (21) of the high-speed gear shaft (20) is a spur gear, and the groove shape of the gear groove (12) is a spur gear shape.

9. The high-speed stage assembly according to any one of claims 1 to 7, characterized in that: The gear (21) of the high-speed gear shaft (20) is a helical gear or a spiral bevel gear, and the groove shape of the gear groove (12) is a helical gear shape.

10. Gear box, characterized in that, It comprises a low-speed stage assembly and a high-speed stage assembly as claimed in any one of claims 1 to 9, wherein the low-speed gear system in the low-speed stage assembly is drivingly connected to the high-speed gear shaft (20) in the high-speed stage assembly.

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