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contributor authorP. E. Wood
contributor authorT. V. Jones
date accessioned2017-05-08T23:59:44Z
date available2017-05-08T23:59:44Z
date copyrightJanuary, 1999
date issued1999
identifier issn1528-8919
identifier otherJETPEZ-26786#160_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/122193
description abstractAn important factor in the performance of brush seals for a wide range of gas turbine applications is the rate of wear at the seal to shaft interface, which is dependent on the contact pressure that exists between the bristles and rubbing surface. This is dependent on a variety of effects. Principally, these are the aerodynamic forces bending the bristles onto the rubbing surface, frictional effects within the bristle pack and at the backing ring that arise with the application of pressure differential, geometrical changes due to centrifugal and thermal growths, and transient differential movements of the rotor that develop in flight manoeuvres. In order to investigate the effect of these phenomena on contact pressure, a test facility has been devised in which the torque exerted by a brush seal on a rotating shaft is used as an indirect measurement of contact pressure. This has necessitated the design of a test facility in which all system torques can be fully calibrated. Consequently, a pressure balanced design has been adopted in which applied seal differential and pressure levels have a minimal effect on axial loads at the rotor bearing assembly. The primary method of torque measurement is the instantaneous deceleration of the rotor. Thus, measurements over a wide speed range are acquired with high frequency instrumentation. The means whereby small parasitic torques are evaluated and corrected is given. Results demonstrating the dependence of contact pressure on seal differential and pressure levels are presented.
publisherThe American Society of Mechanical Engineers (ASME)
titleA Test Facility for the Measurement of Torques at the Shaft to Seal Interface in Brush Seals
typeJournal Paper
journal volume121
journal issue1
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.2816304
journal fristpage160
journal lastpage166
identifier eissn0742-4795
keywordsTest facilities
keywordsPressure
keywordsRotors
keywordsDesign
keywordsGas turbines
keywordsInstrumentation
keywordsTorque
keywordsTorque measurement
keywordsFlight
keywordsAerodynamics
keywordsWear
keywordsMeasurement
keywordsMotion
keywordsManufacturing
keywordsStress AND Bearings
treeJournal of Engineering for Gas Turbines and Power:;1999:;volume( 121 ):;issue: 001
contenttypeFulltext


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