Title:
WATER TURBINE BLADE FITTING STRUCTURE OF HYDRAULIC GENERATING APPARATUS AND HYDRAULIC GENERATING APPARATUS
Document Type and Number:
Japanese Patent JP2020153346
Kind Code:
A
Abstract:
To provide a water turbine blade fitting structure capable of preventing deterioration of strength caused by creep deformation or fretting wear of a hub of water turbine blades when the water turbine blades made of a fiber-reinforced plastic material receive variable load from flowing water.SOLUTION: A hydraulic generating apparatus includes water turbine blades 1 made of a fiber-reinforced plastic material and an electric generator that generates power by receiving rotation of the water turbine blades. A water turbine shaft 20 is inserted into a through-hole 50 of the water turbine blades 1. A pair of flange members 51 and 52 are disposed on both side faces of a hub 10 of the water turbine blades 1. The hub 10 and the flange member 51 and 52 are fastened together by a bolt 53. The flange members 51 and 52 are fitted to the water turbine shaft 20. The pair of flange members 51 and 52 have the same thickness of the bolt 53 in the length direction, and the same area of contact with the hub 10.SELECTED DRAWING: Figure 3
Inventors:
GOTO TOMOMI
KONDO HIROMITSU
KONDO HIROMITSU
Application Number:
JP2019054824A
Publication Date:
September 24, 2020
Filing Date:
March 22, 2019
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F03B3/12; F03B3/04
Domestic Patent References:
| JP2016176413A | 2016-10-06 | |||
| JPH0555119U | 1993-07-23 |
Foreign References:
| US20170241396A1 | 2017-08-24 | |||
| US20170122335A1 | 2017-05-04 | |||
| US20090092495A1 | 2009-04-09 | |||
| WO2012130978A1 | 2012-10-04 |
Attorney, Agent or Firm:
Masashi Noda
Shuji Sugimoto
Shuji Sugimoto