WIND POWER PLANT, TRANSMISSION FOR A WIND POWER PLANT AND FLEXPIN

• US 20120114488A1
• Filed: 05/20/2009
• Published: 05/10/2012
• Est. Priority Date: 05/20/2008
• Status: Abandoned Application

• Current Assignee: Urs Giger
• Original Assignee: Urs Giger
• Inventors: Giger, Urs
• Application Number:
  US13/322,352
• Publication Number:
  US 20120114488A1
• Time in Patent Office: Days
• US Class Current: 416/170.R
• CPC Class Codes: F03D 15/00 Transmission of mechanical power
• CPC Class Codes: F03D 80/70 Bearing or lubricating arrangements
• CPC Class Codes: F05B 2240/53 Hydrodynamic or hydrostatic bearings
• CPC Class Codes: F05B 2260/40311 of the epicyclic, planetary or differential type
• CPC Class Codes: F16C 17/02 for radial load only
• CPC Class Codes: F16C 19/522 related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
• CPC Class Codes: F16C 21/00 Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement F16C17/24, F16C19/52 take precedence
• CPC Class Codes: F16C 23/04 self-adjusting
• CPC Class Codes: F16C 2360/31 Wind motors in general F03D
• CPC Class Codes: F16C 2361/61 Toothed gear systems, e.g. support of pinion shafts in general F16H57/02
• CPC Class Codes: F16C 39/02 using mechanical means
• CPC Class Codes: F16H 1/227 comprising two or more gearwheels in mesh with the same internally toothed wheel
• CPC Class Codes: F16H 1/2836 by allowing limited movement of the planets relative to the planet carrier or by using free floating planets
• CPC Class Codes: F16H 2057/085 Bearings for orbital gears
• CPC Class Codes: F16H 57/0421 on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

According to prior art, a transmission of a wind power plant is integrated at least partially into a hollow main shaft. In terms of said type of conception, a shoulder stop is provided to limit deformation of the main shaft. Also, a planetary gear of a wind power plant transmission is placed on a sleeve of a flexpin. In this respect, an intermediate sleeve, in particular designed as a friction bearing is provided. Also known is that the main shaft is placed with a pretensioned rolling bearing in the housing of the wind power plant. In this respect, a hydrostatic friction bearing is used instead. The above-mentioned aspects of the invention enable the service life of the wind power plant to be significantly increased whilst at the same time simplifying maintenance and reducing production and maintenance costs as well as lowering noise emissions.

Claims

1-45. -45. (canceled)

46. A wind power plant comprising a transmission, wherein a torque is transmitted from a hub via a main shaft to the transmission, and wherein the transmission at least in part is arranged within a hollow space in the main shaft, wherein part of the main shaft forms a rotating transmission housing, a shoulder stop being provided for limiting a deformation of the transmission housing with respect to its axis of rotation.

47. The wind power plant of claim 46, wherein the main shaft has a cup shape, and the shoulder stop is provided at an open edge of the main shaft which is constructed to be an access side of the main shaft.

48. The wind power plant of claim 46, wherein the shoulder stop is arranged at least in part within the main shaft, the shoulder stop cantilevering into the main shaft, preferably the shoulder stop being fastened to a stiffening disc which stands perpendicular to the axis of rotation of the main shaft.

49. The wind power plant of claim 46, wherein the main shaft on an open end comprises a stiffening disc ring which stands perpendicular to the axis of rotation of the main shaft, the shoulder stop being arranged between the main shaft and a planet carrier.

50. The wind power plant of claim 46, wherein the shoulder stop in an unloaded state has a spacing of less than 10 cm to the main shaft, preferably of less than 1 cm, particularly preferably less than 1 mm, above all comprises a friction bearing for the main shaft.

57. A wind power plant, particularly the wind power plant of claim 46, comprising a transmission, wherein the transmission comprises a flexpin assembly including a pin and a sleeve mounted on the pin, wherein the sleeve is equipped for the purpose of carrying a planet, wherein the sleeve of the flexpin assembly comprises an intermediate bush for carrying the planet, the intermediate bush being mounted on the sleeve with a loose seat.

58. The wind power plant of claim 57, comprising a housing and a main shaft mounted therein, wherein the main shaft and the housing comprise a hydrostatic friction bearing against each other, preferably comprising two bearing rings with a collar in between radially protruding from the main shaft.

59. The wind power plant of claim 57, wherein between the bearing rings and the collar, at least one of axial and radial bearing pockets are provided for transporting oil.

60. The wind power plant of claim 58, wherein an axial bearing ring is reasonably fixed on the housing, particularly two axial bearing rings are releasably fixed on the housing.

61. The wind power plant of claim 58, wherein the friction bearing comprises a segmented bearing ring.

62. The wind power plant of claim 58, wherein an oil pump for introducing oil as bearing fluid in bearing pockets is provided, particularly with a pressure of more than 50 bar, preferably with a pressure of over 80 bar, more preferably with a pressure of approximately 100 bar.

63. The wind power plant of claim 62, wherein a pressure drop detection for the oil pressure is provided, which reduces the pump output, but which preferably increases the pump output in order to at least substantially hold the bearing pressure constant when the oil pressure drops as a result of a shaft displacement.

64. The wind power plant of claim 57, wherein a torque is transmitted from a hub via a main shaft to the transmission, and wherein the main shaft is mounted against a housing, characterized in that a controlled fluid damper for the main shaft is provided, wherein the main shaft is mounted on a shoulder stop.

65. The wind power plant of claim 57, wherein a sensor for a deformation is provided on a stiffening disc.

66. The wind power plant of claim 57, wherein a fluid damper is arranged on a friction bearing, the fluid damper preferably comprising several fluid outlets which are arranged distributed over a circumference of the main shaft and can preferably be activated individually.

67. The wind power plant of claim 57, comprising a housing and a main shaft mounted therein, wherein the main shaft and the housing particularly comprise a pre-tensioned cone bearing or a hydrostatic friction bearing against each other, characterized in that a unitary pre-tension adjusting unit is provided.

51. A flexpin assembly for a wind power plant, comprising a pin and a sleeve mounted on the pin, wherein the sleeve is equipped for the purpose of carrying a planet, wherein the sleeve of the flexpin assembly comprises an intermediate bush for carrying the planet, the intermediate bush being mounted on the sleeve with a loose seat.

52. The flexpin assembly of claim 51, wherein the intermediate bush is designed as friction bearing bush, the intermediate bush preferably comprising bronze on a sliding surface.

53. The flexpin assembly of claim 51, wherein the intermediate bush is free of radial protrusions on a side facing away from the pin, so that it can be axially pulled off via a free pin end.

54. The flexpin assembly of claim 51, wherein the intermediate bush has a disc-shaped axial bearing ring, particularly towards a free end of the pin, above all connected to the intermediate bush or unitarily formed with the latter, preferably the intermediate bush being mirror-symmetrical with respect to a mirror plane perpendicular to the pin.

55. The flexpin assembly of claim 51, wherein the intermediate bush comprises a radial oil transport bore, the intermediate bush preferably comprising an oil feed pocket, which is orientated towards the pin, and the intermediate bush comprising an oil bearing pocket, which is orientated away from the pin and thus radially from the inside towards the planet.

56. The flexpin assembly of claim 51, comprising an axial bearing ring, particularly with a bronze ring, preferably two axial bearing rings for the sliding of the planet and/or of the intermediate bush.