Search

CN-122029370-A - Conical connection of sun shaft and planet carrier

CN122029370ACN 122029370 ACN122029370 ACN 122029370ACN-122029370-A

Abstract

The invention relates to a transmission arrangement having a first planetary stage (101) and a second planetary stage (103). The sun shaft (107) of the first planetary stage (101) has an outer cone (115) and the planet carrier (109) of the second planetary stage (103) has an inner cone (119), wherein the outer cone (115) and the inner cone (119) are engaged with one another, and wherein a force-locking and/or form-locking, anti-relative rotational connection is provided between the outer cone (115) and the inner cone (119).

Inventors

  • DIRK STRASSER
  • GERHARD BAUER

Assignees

  • 采埃孚股份公司
  • ZF风能安特卫普有限公司

Dates

Publication Date
20260512
Application Date
20240910
Priority Date
20231013

Claims (9)

  1. 1. A transmission assembly having a first planetary stage (101) and a second planetary stage (103), characterized in that, The sun shaft (107) of the first planetary stage (101) has an outer cone (115) and the planet carrier (109) of the second planetary stage (103) has an inner cone (119), wherein, The outer vertebral body (115) and the inner vertebral body (119) are engaged with each other, and wherein, A force-locking and/or form-locking, anti-relative rotational connection is provided between the outer vertebral body (115) and the inner vertebral body (119).
  2. 2. The assembly of claim 1, wherein the assembly comprises a plurality of components, The outer cone (115) and the inner cone (119) taper from the first planetary stage (101) towards the second planetary stage (103).
  3. 3. An assembly according to any of the preceding claims, characterized in that, The first planetary stage (101) is helical toothed.
  4. 4. An assembly according to any preceding claim, characterized in that There is an interference fit between the outer vertebral body (115) and the inner vertebral body (119).
  5. 5. An assembly according to any preceding claim, characterized in that Has a clamping mechanism that tightens the outer vertebral body (115) and the inner vertebral body (119) axially relative to each other.
  6. 6. An assembly according to claim 4, wherein Has a clamping mechanism (121) which is arranged at least partially inside the outer vertebral body (115) and which tightens the outer vertebral body (115) radially with respect to the inner vertebral body (119).
  7. 7. An assembly according to any of the preceding claims, characterized in that, The outer vertebral body (115) and the inner vertebral body (119) are circular in at least one cross-section.
  8. 8. The assembly according to any one of claims 1 to 6, wherein, The outer vertebral body (115) and the inner vertebral body (119) are non-circular in at least one cross-section.
  9. 9. An assembly according to any preceding claim, characterized in that Having a third planetary stage (105), wherein, The sun shaft (111) of the second planetary stage (103) has an outer cone (117) and the planet carrier (113) of the third planetary stage (105) has an inner cone (119), wherein, The outer cone (117) of the sun shaft of the second planetary stage (103) and the inner cone (119) of the planet carrier of the third planetary stage (103) are engaged with each other and form a force-and/or form-locking, rotationally fixed connection.

Description

Conical connection of sun shaft and planet carrier Technical Field The present invention relates to a transmission assembly according to the preamble of claim 1. Background Wind turbine transmissions having a plurality of successive planetary stages are commercially available. The planet carriers of the downstream planetary stage are in each case connected in a rotationally fixed manner via spline teeth to the sun shaft of the upstream planetary stage. Disclosure of Invention The object of the present invention is to provide an improved transmission arrangement. This object is achieved by a transmission assembly according to claim 1. Preferred developments are contained in the dependent claims and result from the following description and the drawing. The transmission assembly according to the invention comprises a first planetary stage and a second planetary stage. The planetary stage is a gear stage having a ring gear, a planet carrier, planet gears, a sun gear and a sun shaft. The planet gears are rotatably supported in the planet carrier and mesh with the ring gear and/or the sun gear, respectively. The sun gear is connected to the sun shaft in a rotationally fixed manner. Preferably, the ring gear is fixedly secured relative to the housing, i.e. connected in a rotationally fixed manner to the transmission housing or to a structure fixed relative to the housing, while the planet carrier and the sun gear can rotate relative to the transmission housing by means of the sun shaft. According to the invention, the sun shaft of the first planetary stage has an outer cone and the planet carrier of the second planetary stage has an inner cone. The outer cone is a mechanism having the shape of a truncated cone or a hollow truncated cone. Accordingly, the inner cone is a mechanism having a hollow space in the shape of a truncated cone. It is the negative shape of the outer vertebral body. Currently, the outer and inner vertebral bodies are fitted to each other. Thus, the outer vertebral body is at least partially located inside the inner vertebral body, i.e. inside the hollow space of the inner vertebral body. Currently, there is a force-locking and/or form-locking, anti-relative rotational connection between the outer vertebral body and the inner vertebral body. By means of this connection, the sun gear of the first planetary stage is connected in a rotationally fixed manner to the carrier of the second planetary stage. This connection has advantages over the solutions known from the prior art, since it is robust and can be manufactured simply and inexpensively. The transmission assembly according to the invention is particularly suitable for wind turbine transmissions. Preferably, the torque flow extending from the rotor of the wind turbine to the generator extends via the first planetary stage to the second planetary stage. In particular, the torque flow is introduced from the sun gear and the sun shaft of the first planetary stage into the planet carrier of the second planetary stage via a conical connection. In a preferred development, the outer cone and the inner cone taper from the first planetary stage in the direction of the second planetary stage. This corresponds to a tapering in the direction of the torque flow described above. Specifically, starting from the middle plane of the first planetary stage, i.e. the transverse plane which intersects the engagement of the first planetary stage in the middle, the direction tapers toward the middle plane of the second planetary stage, i.e. the transverse plane which intersects the engagement of the second planetary stage in the middle. In wind turbines, this corresponds to the wind direction. The outer and inner vertebral bodies then taper in the wind direction. Tapering refers to the degree of decrease in area of the cross-section. Thus, according to a further development, the area of the outer cone and the area of the hollow space of the inner cone decrease from the first planetary stage in the direction of the second planetary stage. By means of the tapering design according to a development, the connection between the outer cone and the inner cone can be acted upon by an axial force which counteracts the movement of the sun wheel and the sun shaft of the first planetary stage in the direction of the second planetary stage. The connection between the planet carrier of the second planetary stage, or the outer cone and the inner cone, thus forms an axial support in which the sun gear and the sun shaft of the first planetary stage can be supported. In the case of a helical toothing, axial forces are generated which must be intercepted by the axial abutment. The above-described tapering of the outer and inner cones thus enables the first planetary stage to be modified in a helical gearing. In a preferred development, the force-locking connection between the outer vertebral body and the inner vertebral body is achieved by an interference fit. A clamping mechanism