Patent ID: 9512899
Filing Date: 2016-12-06
CPC Classification: F03D,F05B,F16H,Y02E,Y10T

Claim Text:
1. Stationary gear unit comprising an input shaft, and an output shaft substantially parallel with said input shaft, the gear unit being configured for providing a transmission ratio (I tot ) between said input shaft and said output shaft via a layshaft arrangement, the input shaft being provided with a drive gear in mesh with a driven gear of said layshaft arrangement, and the output shaft being provided with a driven gear in mesh with a drive gear of said layshaft arrangement, the transmission ratio (I tot ) being non-unity such that one gear of the drive gear of the input shaft and the driven gear of the output shaft will be arranged for operating at a relatively lower torque, and the other gear will be arranged for operating at a relatively higher torque, either the driven gear of the output shaft will be arranged for operating at a relatively lower torque and the drive gear of the input shaft will be arranged for operating at a relatively higher torque, or the drive gear of the input shaft will be arranged for operating at a relatively lower torque and the driven gear of the output shaft will be arranged for operating at a relatively higher torque, said relatively higher torque being higher than said relatively lower torque, wherein the input shaft being journalled in an input shaft main thrust bearing arrangement, mounted to a main thrust bearing support, and being arranged for limiting axial movement of the input shaft in a first axial direction; the output shaft being journalled in an output shaft main thrust bearing arrangement, said output shaft main thrust bearing arrangement being co-located with said input shaft main thrust bearing arrangement on said main thrust bearing support, said output shaft main thrust bearing arrangement being arranged for limiting axial movement of the output shaft in a second axial direction, said second axial direction being substantially opposite to said first axial direction; said main thrust bearing support rigidly connecting the input shaft main thrust bearing arrangement to the output shaft main thrust bearing arrangement; said drive gear of said input shaft being helical of a first hand; said driven gear of said output shaft being helical of a second hand, said second hand being the same as the first hand for a positive transmission ratio (I wherein said one gear of the driven gear of the output shaft and the drive gear of the input shaft arranged for operating at a relatively lower torque has a helix angle (ψ