Apparatus and method for electric spark peening of gas turbine components

I.V. Timoshkin (Inventor), S.J. MacGregor (Inventor), ROLLS-ROYCE PLC (Patent applicant) (Inventor)

Research output: Patent

Abstract

Peening provides compression of component (6, 46, 56) surfaces in order to create residual surface compressions to resist crack propagation in components such as aerofoils. Previously peening techniques have had problems with respect to achieving adequate treatment depths, speed of treatment and with respect to effectiveness. By the present method arrangement an electrical conductor (1, 41, 51) in the form of a wire is subject to electrical pulses to cause evaporation and subsequent breakdown with high power ultrasound (HPU) propagation in a volume of dielectric fluid towards a component and so peening. The electrical conductor (1, 41, 51) ensures that there is limited possibility of electrical discharge to the component (6, 46, 51) surface whilst the positioning of the wire (1, 41, 51) relative to the surface can be adjusted to achieve best effect particularly if reflector (5) devices are utilised to concentrate (HPU) pulse presentation to the component (6, 46, 56). Furthermore, the component (6, 46, 56) can be surface treated in order to provide protection from potentially damaging emissions from evaporation and electrical discharge to the wire (1, 41, 51).
Original languageEnglish
Patent number20100008786
Publication statusPublished - 14 Jan 2010

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turbine
gas
evaporation
compression
crack propagation
positioning
method
fluid
ultrasound

Keywords

  • patent
  • electric spark peening
  • gas turbines

Cite this

Timoshkin, I. V., MacGregor, S. J., & ROLLS-ROYCE PLC (Patent applicant) (2010). Apparatus and method for electric spark peening of gas turbine components. (Patent No. 20100008786).
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abstract = "Peening provides compression of component (6, 46, 56) surfaces in order to create residual surface compressions to resist crack propagation in components such as aerofoils. Previously peening techniques have had problems with respect to achieving adequate treatment depths, speed of treatment and with respect to effectiveness. By the present method arrangement an electrical conductor (1, 41, 51) in the form of a wire is subject to electrical pulses to cause evaporation and subsequent breakdown with high power ultrasound (HPU) propagation in a volume of dielectric fluid towards a component and so peening. The electrical conductor (1, 41, 51) ensures that there is limited possibility of electrical discharge to the component (6, 46, 51) surface whilst the positioning of the wire (1, 41, 51) relative to the surface can be adjusted to achieve best effect particularly if reflector (5) devices are utilised to concentrate (HPU) pulse presentation to the component (6, 46, 56). Furthermore, the component (6, 46, 56) can be surface treated in order to provide protection from potentially damaging emissions from evaporation and electrical discharge to the wire (1, 41, 51).",
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Timoshkin, IV, MacGregor, SJ & ROLLS-ROYCE PLC (Patent applicant) 2010, Apparatus and method for electric spark peening of gas turbine components, Patent No. 20100008786.

Apparatus and method for electric spark peening of gas turbine components. / Timoshkin, I.V. (Inventor); MacGregor, S.J. (Inventor); ROLLS-ROYCE PLC (Patent applicant) (Inventor).

Patent No.: 20100008786.

Research output: Patent

TY - PAT

T1 - Apparatus and method for electric spark peening of gas turbine components

AU - Timoshkin, I.V.

AU - MacGregor, S.J.

AU - ROLLS-ROYCE PLC (Patent applicant)

PY - 2010/1/14

Y1 - 2010/1/14

N2 - Peening provides compression of component (6, 46, 56) surfaces in order to create residual surface compressions to resist crack propagation in components such as aerofoils. Previously peening techniques have had problems with respect to achieving adequate treatment depths, speed of treatment and with respect to effectiveness. By the present method arrangement an electrical conductor (1, 41, 51) in the form of a wire is subject to electrical pulses to cause evaporation and subsequent breakdown with high power ultrasound (HPU) propagation in a volume of dielectric fluid towards a component and so peening. The electrical conductor (1, 41, 51) ensures that there is limited possibility of electrical discharge to the component (6, 46, 51) surface whilst the positioning of the wire (1, 41, 51) relative to the surface can be adjusted to achieve best effect particularly if reflector (5) devices are utilised to concentrate (HPU) pulse presentation to the component (6, 46, 56). Furthermore, the component (6, 46, 56) can be surface treated in order to provide protection from potentially damaging emissions from evaporation and electrical discharge to the wire (1, 41, 51).

AB - Peening provides compression of component (6, 46, 56) surfaces in order to create residual surface compressions to resist crack propagation in components such as aerofoils. Previously peening techniques have had problems with respect to achieving adequate treatment depths, speed of treatment and with respect to effectiveness. By the present method arrangement an electrical conductor (1, 41, 51) in the form of a wire is subject to electrical pulses to cause evaporation and subsequent breakdown with high power ultrasound (HPU) propagation in a volume of dielectric fluid towards a component and so peening. The electrical conductor (1, 41, 51) ensures that there is limited possibility of electrical discharge to the component (6, 46, 51) surface whilst the positioning of the wire (1, 41, 51) relative to the surface can be adjusted to achieve best effect particularly if reflector (5) devices are utilised to concentrate (HPU) pulse presentation to the component (6, 46, 56). Furthermore, the component (6, 46, 56) can be surface treated in order to provide protection from potentially damaging emissions from evaporation and electrical discharge to the wire (1, 41, 51).

KW - patent

KW - electric spark peening

KW - gas turbines

M3 - Patent

M1 - 20100008786

ER -

Timoshkin IV, MacGregor SJ, ROLLS-ROYCE PLC (Patent applicant), inventors. Apparatus and method for electric spark peening of gas turbine components. 20100008786. 2010 Jan 14.