Rotational fitting structure and planetary gear mechanism

Abstract

The utility model belongs to the technical field of wind power gear box discloses a rotation cooperation structure and planetary gear mechanism, this rotation cooperation structure sets up between mounting piece and rotator, including support piece and cooperation piece, support piece is connected in mounting piece, support piece has first outer circumferential surface, cooperation piece is casted to be shaped in support piece, cooperation piece has inner circumferential surface and second outer circumferential surface, and second outer circumferential surface is used for cooperating with rotator, and cooperation piece is set in support piece and inner circumferential surface and first outer circumferential surface are pasted. This rotation cooperation structure can realize the rotation cooperation between mounting piece and rotator, and cooperation piece is directly casted to be shaped in support piece, and does not need to help the tool or other equipment to assemble with difficulty, reduces the manufacturing difficulty, and casted to be shaped and strengthens the connecting strength of cooperation piece and support piece, improves the reliability of this rotation cooperation structure under high load working condition.

Description

Technical Field

[0001] This utility model relates to the field of wind power gearbox technology, and in particular to a rotating fit structure and a planetary gear mechanism. Background Technology

[0002] The wind turbine gearbox is one of the key components in a wind power generation system. Its function is to transmit the power generated by the rotor under wind force to the generator through a drive shaft, thereby driving the generator to generate electricity. Currently, wind turbine gearboxes generally contain one or more planetary mechanisms, in which the planetary gears are mostly rotatably mounted on the pins of the planet carrier via sliding bearings.

[0003] Existing sliding bearings are generally fixed on the pins of the planetary carrier, and the planetary gears are sleeved on the sliding bearings and cooperate with them. However, the traditional sliding bearings and pins are difficult to assemble and have insufficient connection strength, which cannot meet the high load-bearing conditions of the planetary mechanism, thus limiting the reliability of the planetary mechanism.

[0004] Therefore, there is an urgent need to design a rotational fit structure to solve the above-mentioned problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to provide a rotating fit structure and planetary gear mechanism that can improve the connection strength between the support and the fit, thereby extending the service life.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A rotating fit structure is disposed between the mounting component and the rotating component, the rotating fit structure comprising:

[0008] A support member for connecting the mounting member, the support member having a first outer peripheral surface;

[0009] A mating component is cast into the support component. The mating component has an inner circumferential surface and a second outer circumferential surface. The second outer circumferential surface is used to mate with the rotating component, and the inner circumferential surface is in contact with the first outer circumferential surface.

[0010] Preferably, the first outer peripheral surface is provided with one of a recessed structure or a protruding structure, and the inner peripheral surface is provided with the other of the recessed structure and the protruding structure, wherein the protruding structure is embedded in the recessed structure.

[0011] Preferably, the recessed structure includes a plurality of recesses, which are evenly distributed on the first outer peripheral surface.

[0012] Preferably, the recessed structures are provided at multiple intervals along the axial direction of the support member, and each recessed structure is arranged around the circumference of the support member.

[0013] Preferably, the recessed structure is spirally wound around the first outer peripheral surface.

[0014] Preferably, the mating part is made of copper alloy, and / or the support part is made of alloy steel. When the mating part is cast into the support part by gravity casting or pressure casting, part of the liquid mating part flows into the recessed structure on the first outer peripheral surface to form the protruding structure.

[0015] Preferably, the groove of the recessed structure has a chamfered angle.

[0016] The planetary gear mechanism includes a mounting component, a rotating component, and the aforementioned rotational mating structure. The support component is fixedly disposed on the mounting component, and the rotating component is sleeved on the second outer peripheral surface of the mating component and is capable of rotating around the mating component.

[0017] Preferably, the planetary gear mechanism further includes a lubrication system that sprays lubricating oil between the rotating member and the second outer peripheral surface.

[0018] Preferably, at least two of the mating parts are provided on the support member at axial intervals, and a spacer ring is provided between two adjacent mating parts, with the two ends of the spacer ring abutting against the mating parts on both sides along the axial direction.

[0019] The beneficial effects of this utility model are as follows:

[0020] The rotating fit structure provided by this utility model is disposed between the mounting part and the rotating part. The rotating fit structure includes a support part and a fitting part. The support part is connected to the mounting part. Since the fitting part is disposed on the support part and its inner circumferential surface is attached to the first outer circumferential surface, and its second outer circumferential surface mates with the rotating part, the rotating part can achieve a rotating fit with the mounting part through the rotating fit structure. Since the fitting part is directly cast into the support part, it does not require the laborious assembly of tools or other equipment, which reduces the manufacturing difficulty. At the same time, the casting process enhances the connection strength between the fitting part and the support part, thereby improving the reliability of the rotating fit structure under high load conditions.

[0021] The planetary gear mechanism provided by this utility model includes a mounting component, a rotating component, and the aforementioned rotational mating structure. The rotating component is sleeved on the mating component and mates with the second outer peripheral surface. Therefore, the rotating component can rotate relative to the mounting component through the rotational mating structure. Furthermore, since the mating component is cast into the support component, the tightness of the connection between the two is enhanced. Thus, the planetary gear mechanism has a strong load-bearing capacity and greatly improves its reliability. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the support member and the mating member in one embodiment of the present utility model.

[0023] Figure 2 This is a cross-sectional view of the support member and the mating member in another embodiment provided by this utility model.

[0024] Figure 3 This is a front view of the support member in one embodiment of a specific implementation of this utility model;

[0025] Figure 4 This is a front view of the support member in another embodiment provided by this utility model;

[0026] Figure 5 yes Figure 4 A schematic diagram of the structure at the groove of the concave structure;

[0027] Figure 6 This is a front view of the support member in another embodiment provided by this utility model;

[0028] Figure 7 This is a cross-sectional view of the planetary gear mechanism provided in a specific embodiment of this utility model.

[0029] In the picture:

[0030] 100 - Installation components;

[0031] 200 - Rotating component;

[0032] 300-fixed-distance ring;

[0033] 400-Axial retaining ring;

[0034] 1-Support member; 11-First outer peripheral surface; 12-Recessed structure; 121-Bevel angle; 13-Lubrication channel;

[0035] 2-Matching part; 21-Second outer peripheral surface; 22-Oil outlet hole. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] like Figures 1 to 6 As shown, this utility model provides a rotational fit structure disposed between a mounting member 100 and a rotating member 200. The rotational fit structure includes a support member 1 and a fitting member 2. The support member 1 is connected to the mounting member 100 and has a first outer peripheral surface 11. The fitting member 2 is cast onto the support member 1 and has an inner peripheral surface and a second outer peripheral surface 21. The second outer peripheral surface 21 is used to fit with the rotating member 200, and the inner peripheral surface abuts against the first outer peripheral surface 11. In this embodiment, since the fitting member 2 is disposed on the support member 1 and its inner peripheral surface abuts against the first outer peripheral surface 11, and the second outer peripheral surface 21 is in frictional fit with the rotating member 200, the rotating member 200 can achieve rotational fit with the mounting member 100 through this rotational fit structure. Because the fitting member 2 is directly cast onto the support member 1, it does not require laborious assembly with tools or other equipment, reducing manufacturing difficulty. Simultaneously, casting enhances the connection strength between the fitting member 2 and the support member 1, improving the reliability of the rotational fit structure under high load conditions.

[0041] To further improve the connection strength between the support 1 and the mating part 2, a recessed structure 12 or a protruding structure is provided on the first outer peripheral surface 11, and another recessed structure 12 or a protruding structure is provided on the inner peripheral surface. Figure 1 and Figure 2 (The recessed structure 12 and the protruding structure are not shown in the diagram.) The protruding structure is embedded in the recessed structure 12. Therefore, the embedded fit between the two increases the contact area between the support member 1 and the mating member 2, thereby greatly enhancing the bonding strength between the support member 1 and the mating member 2 and further improving the reliability of the rotating fit structure under high load conditions. At the same time, the embedded fit between the protruding structure and the recessed structure 12 also increases the heat dissipation area between the support member 1 and the mating member 2, which is conducive to the rapid transfer and dissipation of the heat generated by the friction between the rotating member and the first outer peripheral surface 11 of 200 through the support member 1, thereby improving the heat dissipation performance of the rotating fit structure.

[0042] The specific positions of the recessed structure 12 and the protruding structure can be designed according to actual conditions, as long as they are positioned opposite each other and fitted together. In this embodiment, for example... Figures 3 to 6 As shown, a recessed structure 12 is provided on the first outer peripheral surface 11, and a protruding structure matching the recessed structure 12 is provided on the inner peripheral surface. When the two are formed and assembled, the protruding structure is embedded in the recessed structure 12, thereby increasing the bonding strength between the support member 1 and the mating member 2, making it difficult for the mating member 2 to slide relative to the support member 1 or fall off the support member 1.

[0043] The specific shape and distribution of the recessed structure 12 can be set according to the actual situation, as long as the bonding strength between the support member 1 and the mating member 2 remains uniform. In this embodiment, as shown... Figure 3 As shown, the recessed structure 12 includes multiple recesses, which are evenly distributed on the first outer peripheral surface 11. Each recess has the same structure and size, and its cross-sectional shape can be square, rectangular, triangular, or circular; no limitation is made here. In another embodiment, as... Figure 4 As shown, multiple recessed structures 12 are spaced apart along the axial direction of the support member 1, and each recessed structure 12 is arranged circumferentially around the support member 1; specifically, the recessed structures 12 extend circumferentially along the support member 1 to form a continuous ring, and multiple recessed structures 12 are evenly arranged along the axial direction of the support member 1. In another embodiment, as... Figure 6 As shown, the recessed structure 12 is spirally wound around the first outer peripheral surface 11.

[0044] Furthermore, the mating part 2 is cast onto the support part 1 to ensure a tight fit between the two, while also allowing the protruding structure to fit snugly against the recessed structure 12. In this embodiment, the mating part 2 is cast onto the support part 1 by gravity casting or pressure casting. During this process, some of the liquid mating part 2 flows into the recessed structure 12 on the first outer peripheral surface 11, thereby forming a protruding structure. Both the mating part 2 and the support part 1 are made of metallic materials. The specific manufacturing materials can be selected according to actual conditions, as long as the melting point of the support part 1 is higher than that of the mating part 2 so that the mating part 2 can be smoothly cast onto the support part 1 and formed. For example, the mating part 2 is made of copper alloy, and the support part 1 is made of alloy steel.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the support member 1 is a hollow cylindrical structure or a solid cylindrical structure, the mating member 2 is a cylindrical structure that matches the support member 1, the rotating member 200 is sleeved on the mating member 2, the second outer peripheral surface 21 is a smooth surface, and the rotating member 200 can rotate relative to the second outer peripheral surface 21 of the mating member 2; and since both the mating member 2 and the support member 1 are made of metal, the heat generated by friction between the rotating member 200 and the second outer peripheral surface 21 will be transferred to the support member 1 through the mating member 2 and eventually dissipated, so that the rotating member 200 can rotate normally on the rotating mating structure.

[0046] To prevent stress concentration from causing fracture of the protruding or recessed structure 12, and to further improve the bonding strength between the support 1 and the mating part 2, such as... Figure 5 As shown, the groove of the recessed structure 12 has a chamfered angle. In this embodiment, the recessed structure 12 is dotted on the first outer peripheral surface 11, and the groove of the recessed structure 12 is surrounded by a chamfered angle. When the mating part 2 is cast onto the support member 1, the liquid mating part 2 will combine with the support member 1 at the chamfered angle of the groove of the recessed structure 12. Compared with the right angle structure without a chamfer, the chamfer increases the contact area between the mating part 2 and the support member 1, thereby further improving the connection strength between the support member 1 and the mating part 2.

[0047] like Figure 7As shown, this utility model also provides a planetary gear mechanism, which includes a mounting member 100, a rotating member 200, and the aforementioned rotational engagement structure. A support member 1 is fixedly mounted on the mounting member 100, and the rotating member 200 is sleeved on the second outer peripheral surface 21 of the engagement member 2 and can rotate around the engagement member 2. In this embodiment, the mounting member 100 is a planet carrier, the rotating member 200 is a planetary gear rotatably mounted on the planet carrier, the support member 1 is a pin, and the engagement member 2 serves as a sliding bearing disposed between the pin and the planetary gear to achieve rotational engagement with the rotating member 200. The rotating member 200 is sleeved on the engagement member 2 and frictionally engages with the second outer peripheral surface 21. Therefore, the rotating member 200 can rotate relative to the mounting member 100 through the rotational engagement structure. Furthermore, since the engagement member 2 is cast into the support member 1, the tightness of the connection between the two is enhanced. Therefore, this planetary gear mechanism has a strong load-bearing capacity and greatly improves its reliability.

[0048] Furthermore, this utility model also provides a wind turbine gearbox, which includes a housing and the aforementioned planetary gear mechanism. The planetary gear mechanism is disposed inside the housing and connected to the output shaft of the wind turbine gearbox's drive shaft to change the transmission ratio of the wind turbine gearbox to achieve the required speed change output.

[0049] Specifically, such as Figure 7 As shown, to ensure the stability of the rotating component 200 during rotation, one, two, or more mating components 2 can be cast on the support component 1 according to its actual length. In this embodiment, two mating components 2 of the same size are cast on the support component 1. A spacer ring 300 is provided between the two mating components 2. The spacer ring 300 is interference-fitted onto the support component 1. The two ends of the spacer ring 300 along the axial direction abut against the mating components 2 on both sides. The spacer ring 300 is used to position the casting position of the two mating components 2 on the support component 1 to ensure the installation accuracy of the mating components 2 and to provide additional limiting effect for the installation of the two mating components 2, thereby improving the installation stability of the mating components 2. One end of the support component 1 is interference-fitted into the mounting groove of the mounting component 100. The mounting component 100 is also provided with an axial retaining ring 400, which abuts against the other end face of the support component 1 away from the mounting groove, thereby axially limiting the support component 1 and improving the installation stability of the support component 1 on the mounting component 100.

[0050] In order to extend the service life of this planetary gear mechanism, such as Figure 7As shown, the planetary gear mechanism also includes a lubrication system that sprays lubricating oil between the rotating component 200 and the second outer peripheral surface 21. In this embodiment, the lubrication system includes an oil chamber, an oil pump, a lubrication channel 13, and an oil outlet 22. The oil chamber and the oil pump are both located in the housing of the wind turbine gearbox. The oil chamber stores lubricating oil, and the oil pump delivers the lubricating oil from the oil chamber to the lubrication channel 13, and then flows through the oil outlet 22 to the space between the second outer peripheral surface 21 and the rotating component 200. It can be understood that the lubrication channel 13 is located inside the support member 1, and the oil outlet 22 is disposed through the mating member 2, with the oil outlet 22 facing the outlet of the lubrication channel 13. Therefore, the lubricating oil can be delivered to the space between the second outer peripheral surface and the rotating component 200 under the drive of the oil pump, so as to form an oil film between the rotating component 200 and the mating member 2, thereby reducing the sliding friction between the two.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotating fit structure, disposed between the mounting part (100) and the rotating part (200), characterized in that, The rotational fit structure includes: Support member (1), the support member (1) is used to connect the mounting member (100), the support member (1) has a first outer peripheral surface (11); The fitting part (2) is cast into the support part (1). The fitting part (2) has an inner circumferential surface and a second outer circumferential surface (21). The second outer circumferential surface (21) is used to fit with the rotating part (200). The inner circumferential surface is in contact with the first outer circumferential surface (11).

2. The rotational fit structure according to claim 1, characterized in that, The first outer peripheral surface (11) is provided with one of a recessed structure (12) or a protruding structure, and the inner peripheral surface is provided with the other of the recessed structure (12) and the protruding structure, and the protruding structure is embedded in the recessed structure (12).

3. The rotational fit structure according to claim 2, characterized in that, The recessed structure (12) includes a plurality of recessed holes, which are evenly distributed on the first outer peripheral surface (11).

4. The rotational fit structure according to claim 2, characterized in that, The recessed structures (12) are provided in multiple ways along the axial direction of the support member (1), and each recessed structure (12) is arranged around the support member (1) in the circumferential direction.

5. The rotational fit structure according to claim 2, characterized in that, The recessed structure (12) is spirally wound around the first outer peripheral surface (11).

6. The rotational fit structure according to claim 2, characterized in that, The fitting part (2) is a copper alloy, and / or the support part (1) is an alloy steel. When the fitting part (2) is cast into the support part (1) by gravity casting or pressure casting, part of the liquid fitting part (2) flows into the recessed structure (12) on the first outer peripheral surface (11) to form the protruding structure.

7. The rotational fit structure according to any one of claims 2-6, characterized in that, The groove of the recessed structure (12) has a beveled angle.

8. A planetary gear mechanism, characterized in that, It includes a mounting component (100), a rotating component (200), and a rotating fit structure as described in any one of claims 1-7. The support component (1) is fixedly disposed on the mounting component (100), and the rotating component (200) is sleeved on the second outer peripheral surface (21) of the fit component (2) and is capable of rotating around the fit component (2).

9. The planetary gear mechanism according to claim 8, characterized in that, The planetary gear mechanism also includes a lubrication system that sprays lubricating oil between the rotating member (200) and the second outer peripheral surface (21).

10. The planetary gear mechanism according to claim 8, characterized in that, At least two mating parts (2) are provided on the support member (1) at intervals along the axial direction. A spacer ring (300) is provided between two adjacent mating parts (2). The two ends of the spacer ring (300) along the axial direction abut against the mating parts (2) on both sides respectively.

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