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Bearing assembly for a marine turbine shaft, and marine turbine including such a bearing assembly

A technology for bearing assembly, turbine, applied in the direction of bearing elements, shafts and bearings, bearings for rotary motion, etc., capable of solving problems such as multiple assembly defects, pollution, etc.

Inactive Publication Date: 2013-09-11
ALSTOM RENEWABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large diameter of the marine turbine shaft induces relatively large and numerous assembly and geometric imperfections, which require the bearing assembly to react very quickly to shaft vibrations
Furthermore, immersing the marine turbine bearings in oil creates a risk of contamination of the environment where the marine turbine is arranged

Method used

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  • Bearing assembly for a marine turbine shaft, and marine turbine including such a bearing assembly
  • Bearing assembly for a marine turbine shaft, and marine turbine including such a bearing assembly
  • Bearing assembly for a marine turbine shaft, and marine turbine including such a bearing assembly

Examples

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Embodiment approach

[0068] - instead of a flange 13 integral with the shaft 12, the flange may consist of two parts, for example two half-flanges juxtaposed axially and / or mounted on said shaft;

[0069] - said bearing assembly comprises 10 to 20 said bearing units, for example 20, 21;

[0070] - the same said bearing surface is connected to several movable parts respectively belonging to several bearing units; in other words, said spacer is common to all said elastic members; in particular, the same bearing surface is connected to all movable parts.

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PUM

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Abstract

To recover the axial forces transmitted by a rotating shaft (12), the bearing assembly (8) of the invention includes a plurality of distributed bearing units (30). Each bearing unit (30) comprises: a stationary base (70); a resilient member (50) having a stationary portion and a portion that is completely movable in a main direction (X50) of the forces to be supported; and a bearing surface that defines, together with the shaft (12), a water film. The bearing surface is connected to the movable portion. The minimum radius (R31) of the bearing surface is between 1 m and 3 m. The resilient member (50) and the base (70) define at least one water chamber. A plurality of ducts are arranged so as to connect the chambers together, thereby defining a closed circuit.

Description

technical field [0001] The present invention relates to a bearing assembly for supporting a rotating marine turbine shaft, ie for absorbing axial forces exerted by said shaft. Furthermore, the invention relates to a marine turbine comprising a rotatable shaft and such a bearing assembly. In particular, the invention may be applied to marine turbines installed in engines in which liquid flow is adapted to circulate in either direction. Background technique [0002] Hydrodynamic turbines according to the prior art generally comprise a shaft with a diameter of about 1 m and bearing assemblies immersed in oil to support said rotating shaft. In particular, a plurality of bearing units are distributed about the axis of rotation to absorb radial forces exerted by said shaft. The bearing unit typically comprises a fixed base, a resilient member and a bearing surface which together with the shaft define an oil film approximately 0.5mm thick. [0003] The function of the bearing un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B11/06F16C17/04F16C17/14
CPCF16C17/04F16C17/14F16C2300/14F03B11/06Y02E10/20F03B11/066F16C33/02
Inventor J-F·贝尔泰亚
Owner ALSTOM RENEWABLE TECH