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Title: Pin and roller attachment system for ceramic blades

Abstract

In a turbine, a plurality of blades are attached to a turbine wheel by way of a plurality of joints which form a rolling contact between the blades and the turbine wheel. Each joint includes a pin and a pair of rollers to provide rolling contact between the pin and an adjacent pair of blades. Because of this rolling contact, high stress scuffing between the blades and the turbine wheel reduced, thereby inhibiting catastrophic failure of the blade joints. 3 figs.

Inventors:
Publication Date:
Research Org.:
Solar Turbines Inc
OSTI Identifier:
87740
Patent Number(s):
US 5,435,693/A/
Application Number:
PAN: 8-198,889
Assignee:
Solar Turbines Inc., San Diego, CA (United States) CHO; SCA: 421000; PA: EDB-95:119388; SN: 95001431583
DOE Contract Number:
AC02-92CE40960
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 25 Jul 1995
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; TURBINE BLADES; FASTENERS; ROLLER BEARINGS; CERAMICS; DESIGN; STRESS RELAXATION; GAS TURBINES

Citation Formats

Shaffer, J.E. Pin and roller attachment system for ceramic blades. United States: N. p., 1995. Web.
Shaffer, J.E. Pin and roller attachment system for ceramic blades. United States.
Shaffer, J.E. Tue . "Pin and roller attachment system for ceramic blades". United States. doi:.
@article{osti_87740,
title = {Pin and roller attachment system for ceramic blades},
author = {Shaffer, J.E.},
abstractNote = {In a turbine, a plurality of blades are attached to a turbine wheel by way of a plurality of joints which form a rolling contact between the blades and the turbine wheel. Each joint includes a pin and a pair of rollers to provide rolling contact between the pin and an adjacent pair of blades. Because of this rolling contact, high stress scuffing between the blades and the turbine wheel reduced, thereby inhibiting catastrophic failure of the blade joints. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 25 00:00:00 EDT 1995},
month = {Tue Jul 25 00:00:00 EDT 1995}
}
  • In a turbine, a plurality of blades are attached to a turbine wheel by way of a plurality of joints which form a rolling contact between the blades and the turbine wheel. Each joint includes a pin and a pair of rollers to provide rolling contact between the pin and an adjacent pair of blades. Because of this rolling contact, high stress scuffing between the blades and the turbine wheel reduced, thereby inhibiting catastrophic failure of the blade joints.
  • A locking pin system is described for locking a plurality of free standing closing blades disposed in a circular array of curved side entry steam turbine blades disposed in a disc to form a row of rotating blades having curved root portions which are slidably received by the curved slots in the disc and each blade has a platform portion and an air foil portion respectively disposed radially outwardly from the root portion. The platform portion of each blade has four sides, an inlet side, on the side of the platform the steam enters the blade row, an outlet sidemore » on the side the steam exits the blade row, a forward arcuate side and a rear arcuate side, the latter two arcuate sides being relative to the direction of rotation of the blade row, the closing blade locking pin system.« less
  • A composition and method are described for attaching a ceramic electrode to a metal conductor. A layer of randomly interlocked metal fibers saturated with polyimide resin is sandwiched between the ceramic electrode and the metal conductor. The polyimide resin is then polymerized providing bonding.
  • A turbine blade having a preestablished rate of thermal expansion is attached to a turbine wheel having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine blade. The turbine blade has a root portion having a pair of recessed portions thereon. The turbine wheel includes a plurality of openings in which the turbine blade is positioned. Each of the openings have a pair of grooves therein in which are positioned a pair of pins having a generally rectangular cross-section and a reaction surface thereon. A pair of cylindrical rollers interposed respectivemore » ones of the pair of reaction surfaces and the pair of recessed portions. The attachment system or turbine assembly provides an economical, reliable and effective attachment of a component having a preestablished rate of thermal expansion to a component having a greater preestablished rate of thermal expansion. 3 figures.« less
  • A turbine blade having a preestablished rate of thermal expansion is attached to a turbine wheel having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine blade. The turbine blade has a root portion having a first groove and a second groove therein. The turbine wheel includes a plurality of openings in which the turbine blade is positioned. Each of the openings has a first groove and a second groove therein. The space or void formed between the first grooves and the second grooves has a plurality of spherical balls positionedmore » therein. The plurality of spherical balls has a preestablished rate of thermal expansion being equal to the preestablished rate of thermal expansion of the turbine blade. 4 figures.« less