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CN-122003549-A - Key for setting up a connection which is secured against relative rotation

CN122003549ACN 122003549 ACN122003549 ACN 122003549ACN-122003549-A

Abstract

The invention relates to a key (10) for establishing a rotationally fixed connection between two annular components (2, 3). The key (10) has a longitudinal extension (L), a first engagement section (11) for engaging with the first annular member (2), and a second engagement section (12) for engaging with the second annular member (3). The first engagement section (11) has a flat contact surface (13.1; 13.2) for engagement with the first annular member (2), and the second engagement section (12) has a curved contact surface (14) for engagement with the second annular member (3). The invention further relates to an assembly (1) for torque transmission having two annular components (2, 3) and such a key (10).

Inventors

  • Dejan Stoyanov
  • Matthias Weize
  • Dirk Bosmans

Assignees

  • 采埃孚股份公司
  • ZF风能安特卫普有限公司

Dates

Publication Date
20260508
Application Date
20240910
Priority Date
20231013

Claims (10)

  1. 1. A key (10) for producing a rotationally fixed connection between two annular components (2, 3), wherein the key (10) has a longitudinal extension (L), a first engagement section (11) for engaging with the first annular component (2), and a second engagement section (12) arranged downstream of the first engagement section in the longitudinal extension (L) for engaging with the second annular component (3), wherein the first engagement section (11) has a flat contact surface (13.1; 13.2) for engaging with the first annular component (2), and the second engagement section (12) has a curved contact surface (14) for engaging with the second annular component (3).
  2. 2. Key (10) according to claim 1, characterized in that the first scarf section (11) is designed as a cuboid for forming two parallel flat contact surfaces (13.1, 13.2) and the second scarf section (12) is designed as a cylinder for forming the curved contact surface (14).
  3. 3. Key (10) according to any of the preceding claims, characterized in that the first engagement section (11) has a total contact area for engagement with the first annular member (2) which is smaller than the total contact area of the second engagement section (12) for engagement with the second annular member (3).
  4. 4. Key (10) according to any one of the preceding claims, characterized in that the second scarf section (12) has relief grooves (16) for adjusting the rigidity of the key (10).
  5. 5. Key (10) according to any of the preceding claims, characterized in that the key (10) has an undercut (15.1; 15.2) in the transition area from the first scarf section (11) to the second scarf section (12).
  6. 6. Key (10) according to any one of the preceding claims, characterized in that the second scarf section (12) has a bulge running in the longitudinal extension direction (L), which bulge gives the curved contact surface (14) a convexity running in the longitudinal extension direction (L).
  7. 7. Key (10) according to any of the preceding claims, characterized in that the flat contact surface (13.1; 13.2) of the first engagement section (11) has a bulge running transversely to the longitudinal extension direction (L), which bulge gives the flat contact surface (13.1; 13.2) convexity running transversely to the longitudinal extension direction (L).
  8. 8. Assembly (1) for torque transmission, having two annular members (2, 3) and a key (10) according to any of the preceding claims, wherein a first engagement section (11) of the key (10) engages with the first annular member (2) and a second engagement section (12) of the key (10) engages with the second annular member (3) for transmitting torque between the annular members (2, 3).
  9. 9. Assembly (1) according to claim 8, characterized in that the first annular member (2) has a rectangular groove (8) for housing the first scarf section (11) and the second annular member (3) has a circular hole (7) for housing the second scarf section (12).
  10. 10. Assembly (1) according to claim 8 or 9, characterized in that said first annular member (2) has a higher strength than said second annular member (3).

Description

Key for setting up a connection which is secured against relative rotation Technical Field The invention relates to a key for establishing a rotationally fixed connection between two annular components. The invention further relates to an assembly for torque transmission having two annular members and such a key. Background Wind turbines include a rotor that is mechanically coupled to a generator, typically by a gear train assembly. In the transmission assembly, different ring members are provided, which are arranged concentrically to each other and which are connected to each other against relative rotation by means of keys for torque transmission. With conventional keys, unacceptably high loads in the ring members or keys are often caused due to the high loads occurring in the wind turbines. It is therefore an object of the present invention to provide a key for establishing a connection between two annular members that is resistant to relative rotation, which key optimizes the load characteristics in the annular members and the key. Disclosure of Invention This object is achieved by a key for establishing a connection between two annular members that is resistant to relative rotation as claimed in claim 1. These annular members may be members having an annular shape as a whole. The annular members may be arranged concentrically with each other. For example, the first annular member is disposed radially within the second annular member. The annular member may be designed for use in a wind turbine (e.g. a drive train assembly of a wind turbine). The transmission assembly may be arranged in a torque transmission path between a rotor of the wind turbine and the generator. The annular members may each have a diameter of several meters. One of these annular members may be a bearing ring of a bearing of a drive train assembly of the wind turbine. The bearing may be, for example, a spherical roller bearing. The second annular element may be a hollow shaft, which may be designed as a flange. The two annular members and the key may together constitute an assembly for torque transmission. The assembly may have a circumferential direction, which may extend in a direction of the circumference of the annular member. Furthermore, the assembly may have a radial direction, which may extend in the radial direction of the annular member. Furthermore, the assembly may have an axial direction, which may extend in the axial direction of the annular member. The key may have a substantially elongated shape as a whole, in which shape the direction of extension, i.e. the main direction of extension, is larger than the length of the key in a spatial direction arranged perpendicular to the main direction of extension. The key of the present invention has a longitudinal extension. If the keys are mounted as specified for establishing a connection between the annular members that is resistant to relative rotation, the longitudinal extension direction of the keys may be arranged parallel to the radial direction or have at least one component arranged parallel to the above-mentioned radial direction. The longitudinal extension direction of the key may be its main extension direction. The key further has a first engagement section for engaging with the first annular member, and a second engagement section arranged downstream of the first engagement section in the longitudinal direction for engaging with the second annular member. The engagement section of the key and the annular member may cooperate with each other such that the key may be connected with the annular member via a clearance fit or an interference fit by its respective engagement section. The key may be formed in one piece from a single material (e.g., a ferrite material or other material), wherein a first region of the key may form a first scarf section and another region of the key may form a second scarf section. In an alternative embodiment, the key is formed from multiple pieces, which can be of different materials. The components can be firmly connected to one another, for example, by a material-locking, form-locking and/or friction-locking connection. The bonds may be subjected to a heat treatment and/or a surface treatment, such as nitriding, to increase wear resistance. The first engagement section of the key has a flat contact surface for engagement with the first annular member. In one embodiment, the first engagement section has two flat contact surfaces arranged parallel to one another, which may each have a rectangular shape, for example. In another aspect, the second engagement section has a curved contact surface for engagement with the second annular member. The flat and curved contact surfaces of the first and second engagement sections may be designed such that the second engagement section enables a rotation of the key relative to the second annular member about a rotation axis extending in the direction of the longitudinal extension of the key. On the