A planetary type gear unit comprising a planet carrier with a planet bogie plate

Abstract

The invention provides a planet gear unit for a planet carrier with a planet load plate. The planet carrier is provided with at least a planet shaft; therefore, on the both sides of the load plate, the planet wheel is arranged on the planet shaft through a taper roller bearing, and the extremities of the planet shaft are provided with axial shifting parts to forms a support; the support provides axial support for an internal bearing ring of the taper roller bearing; a tension device is arranged on the planet shaft, which enables the axial shifting part to mutually shift and is used for controlling the pre-tension of the taper roller bearing. By shifting the axial shifting part through the tension device, the pre-tension on the taper roller planet bearing can be controlled, so as to avoid or at least limit the gap in the bearing, thereby reducing the failure of the planet bearing caused by misplacement and dynamic effect.

Description

technical field [0001] The invention relates to a planetary gear unit with sun, planet and ring gears and a planet carrier comprising a planetary load plate and at least one planet shaft, whereby on both sides of the load plate the planets pass through conical Roller bearings are mounted on the planetary shafts. [0002] More particularly but not exclusively, the present invention relates to a planetary gear unit of the above-mentioned type for use in a wind turbine. Background technique [0003] Such planetary gear units are known from the state of the art. [0004] In the technology of wind turbines, for example, there is a tendency to integrate components in order to reduce the overall weight, so that the associated loads and thus the stresses on the structure of the wind turbine can be minimized. [0005] Typical integration is obtained by using a planetary gear unit whereby the bearings supporting the planet carrier also serve as main bearings for supporting the rotor...

AI Technical Summary

Problems solved by technology

[0013] Premature failure of currently known planetary bearings is a common problem which can be caused by dynamic effects due to play in the bearings and deformation of the bearings under the influence of load

[0014] Furthermore, the more integrated the design, the more limited the space available between the planet carrier and the planet wheels becomes, which complicates, for example, the assembly and maintenance of the gear unit or the adjustment of specific components

[0015] Another disadvantage of the currently known gear units is that the assembly of the planetary bearings, especially the tapered roller bearings, requires considerable axial space, which limits the compactness of the design

[0016] A further disadvantage of existing gear units is that proper assembly of the planetary bearings is only possible when the planetary carrier is disassembled

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