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CN-121986224-A - Support element for a gear system component

CN121986224ACN 121986224 ACN121986224 ACN 121986224ACN-121986224-A

Abstract

The invention relates to a planetary gear system (10) for a wind turbine (106) that is operated via a rotor (106), having at least a first and a second planetary stage (141, 142) that rotate about a rotational Axis (AD) in a gear system housing (12), wherein the two planetary stages (141, 142) are drive-connected between a sun gear (221) of the first planetary stage (141) and a planet carrier (162) of the second planetary stage (142). The sun gear (221) of the first planetary stage (141) is connected to the planet carrier (161) of the first planetary stage (141) via a releasable support element (30) as required. By means of the support element (30) connecting the sun gear (221) of the first planetary stage (141) to the planet carrier (161) of the first planetary stage (141), the planet carrier (161) of the first planetary stage (141) can be used to support and center its own sun gear (221) in transport situations and before final assembly or disassembly on/from the rotor shaft (118).

Inventors

  • R. Hambrecht

Assignees

  • 弗兰德有限公司

Dates

Publication Date
20260505
Application Date
20240926
Priority Date
20230927

Claims (14)

  1. 1. Planetary gear device (10) for a wind power plant (70) driven via a rotor (72), comprising At least one first and one second planetary stage (14, 1 ,14 2 ) rotating about an axis of rotation (A D ) in the gear housing (12), wherein the two planetary stages (14, 1 ,14 2 ) are in driving connection between the sun gear (22, 1 ) of the first planetary stage (14, 1 ) and the planet carrier (16, 2 ) of the second planetary stage (14, 2 ), and -A support element (30) connecting the sun gear (22 1 ) of the first planetary stage (14 1 ) to the planet carrier (16 1 ) of the first planetary stage (14 1 ) and being releasable from the planet carrier (16 1 ) of the first planetary stage (14 1 ) as required.
  2. 2. The planetary gear device (10) according to claim 1, characterized in that the planet carrier (16 2 ) of the second planetary stage (14 2 ) is mounted in the gear device housing (12) as centrally as possible via a bearing (24).
  3. 3. Planetary gear device (10) according to claim 1 or 2, characterized in that the support element (30) is arranged concentrically with respect to the rotation axis a D .
  4. 4. A planetary gear device (10) according to any of claims 1-3, characterized in that the support element (30) is held against an axial contact surface (32) and/or a radial contact surface of the sun gear (22 1 ) of the first planetary stage (14 1 ).
  5. 5. The planetary gear device (10) according to claim 4, characterized in that the support element (30) is held relative to the sun gear (22 1 ) via at least one threaded connection (34).
  6. 6. The planetary gear device (10) according to any of claims 1 to 5, wherein the support element (30) is radially received within a receiving volume (36) of a planet carrier (16 1 ) of the first planetary stage (14 1 ).
  7. 7. The planetary gear device (10) according to claim 6, characterized in that the support element (30) is supported with respect to an inner circumferential surface (40) of the receiving volume (36).
  8. 8. The planetary gear device (10) according to claim 7, characterized in that the support element (30) is held relative to the inner circumferential surface (40) via at least one threaded connection (42).
  9. 9. The planetary gear device (10) according to claim 6, characterized in that the support element (30) is held against an axial contact surface (46) within the receiving volume (36) via at least one threaded connection (48).
  10. 10. The planetary gear device (10) according to claim 7, characterized in that the support element (30) is held relative to the inner circumferential surface (40) via a set of conical clamping elements (44).
  11. 11. The planetary gear device (10) according to any of claims 1 to 10, characterized in that a plurality, preferably at least three support spindles (50) are provided which are distributed over the circumference of the gear device housing (12) and support a planet carrier (16 1 ) of the first planetary stage (14 1 ) relative to the gear device housing (12).
  12. 12. The planetary gear arrangement (10) according to claim 11, characterized in that the support spindle (50) comprises an electrically or hydraulically operated cylinder element (52).
  13. 13. A drive train (102) for a wind power plant (100), for torque-transmitting connection of a rotor (106) to a generator (112), comprising a main bearing unit (108), a main shaft (118) and a gear arrangement (10) driven via the main shaft (118), characterized in that the gear arrangement (10) is designed as a planetary gear arrangement as claimed in any of the preceding claims.
  14. 14. Wind power plant (100) comprising a rotor flange (104) with a rotor (106) and a generator (112), wherein a drive train (102) is provided which is held on a machine support (114) and which connects the rotor flange (104) to the generator (112), characterized in that the drive train (102) is a drive train according to claim 13.

Description

Support element for a gear system component Technical Field The invention relates to a planetary gear for a wind power plant driven by a rotor, comprising at least one first planetary stage and a second planetary stage which rotate in a gear housing about a rotational axis A D, wherein the two planetary stages between the sun gear of the first planetary stage and the planet carrier of the second planetary stage are connected as a transmission. Background Integrated drive train systems are increasingly used in the wind power plant industry due to increased cost pressures and increased torque densities required. In one possible configuration of the integrated drive train bearing, the gearing housing of the planetary gearing is rigidly connected to the housing of the main bearing unit, wherein the rotor shaft is rotatably held in the main bearing unit relative to the housing via the bearing. The planet carrier of the first planetary stage is firstly drivingly connected to the rotor shaft and secondly is not separately mounted in the gear housing. The planet carrier of the first planetary stage is thus indirectly mounted in the main bearing unit via the rotor shaft. This means that in a state in which the planetary gear device is not mounted on the main bearing unit, the planet carrier of the first planetary stage is not supported by the bearing and is located in an eccentric position due to gravity. Thus, for assembly, disassembly and transportation purposes, the carrier of the first planetary stage must be fixed in place and at least approximately centered, with the result that no contact forces and no mass acceleration forces act on the toothing system. If contact forces and mass acceleration forces are to be applied, the interlocking teeth of the first planetary stage may collide with each other due to impact or vibration and be damaged or pre-damaged due to fretting corrosion. Up to now, the planet carrier has been adjustably fixed relative to the ring gear (of the first planetary stage in each case) by bolts on the rotor and/or generator side via threaded bores distributed on the outer circumference in the connecting flange of the gear housing. A disadvantage of this solution is that the rotor-side and generator-side flanges must be present on the ring gear of the first planetary stage in order to allow for fixation. Alternatively, if only a flange on the generator side is available, an anchoring option, such as a threaded hole, would have to be made in the planet carrier, and thus the target positioning of the planet carrier with respect to the threaded hole in the connection flange would have to be established. Only then can the device be fixed in all spatial directions. DE 10 2019 214094 A1 describes a variant with an inserted slide which presses against the planet carrier and holds it in place. US 2018 02 09 512 A1 discloses a planetary gear for a wind power plant, wherein the planet carrier bearing is designed such that it is mounted indirectly via the main shaft on the rotor side. The main shaft or corresponding shaft flange covers the plane in which the first sun gear and the first planet carrier lie. The plane is inaccessible without dismantling the spindle. Disassembly is also not possible without further attachment, because the shaft flange with the full support shoulder engages behind the bearing of the first planetary stage held in the housing. DE 10 2014 201 465 A1 discloses a generator for a wind power plant, the rotor of which is coupled modularly to the output side of a planetary gear. In the recent drive train concept, there is no rotor-side housing flange. This is an integral part of the rotor bearing housing and is not available for support during transport and installation of the gearing on the main bearing unit. Thus, a modern drive train concept is needed to provide support for the planet carrier of the first planetary stage for transportation and assembly purposes. Disclosure of Invention The object of the present invention is to indicate measures that enable a planet carrier to be supported for transport and assembly purposes. This object is achieved by a planetary gear arrangement having the features of claim 1. Preferred refinements are specified in the dependent claims and in the following description and may each represent an aspect of the invention, alone or in combination. If one feature is presented in combination with another feature, this is for a simplified summary of the invention only and is in no way intended to indicate that the feature, too, cannot be a development of the invention without other features. One embodiment relates to a planetary gear set for a wind power plant driven via a rotor, having at least one first and second planetary stage which rotate in a gear housing about an axis of rotation a D, wherein the two planetary stages are connected in a driving manner between a sun gear of the first planetary stage and a planet carrier of the second planetary sta