US3583824A — Temperature controlled shroud and shroud support

Claim 1

Independent Claim 128 words

In a turbomachine of the type having a compressor, a combustor for generating a motive fluid stream and a turbine disposed in serial flow relationship; shroud means defining the outer boundary of motive fluid flow through at least a portion of said turbine; and means for supporting said shroud means including a portion in flow communication with fluid pressurized by said compressor and a flange of large thermal mass normally disposed in a thermally remote position relative to said motive fluid stream and said compressor-pressurized fluid, the improvement comprising: means for directing compressor-pressurized fluid toward said flange and then, sequentially, impinging such fluid against said shroud means, whereby effective temperature control of said shroud and shroud support means is provided during transient and steady-state operation of said turbomachine.

Claim 2

Dependent Claim 128 words

In a turbomachine of the type having a compressor, a combustor for generating a motive fluid stream and a turbine disposed in serial flow relationship; shroud means defining the outer boundary of motive fluid flow through at least a portion of said turbine; and means for supporting said shroud means including a portion in flow communication with fluid pressurized by said compressor and a flange of large thermal mass normally disposed in a thermally remote position relative to said motive fluid stream and said compressor-pressurized fluid, the improvement comprising: means for directing compressor-pressurized fluid toward said flange and then, sequentially, impinging such fluid against said shroud means, whereby effective temperature control of said shroud and shroud support means is provided during transient and steady-state operation of said turbomachine.

Claim 3

Dependent Claim 89 words

The improved turbomachine of claim 1 wherein said shroud and shroud support means cooperatively define a chamber, with a first wall of said chamber defined by the portion of said support means in flow communication with said pressurized fluid and another chamber wall defined by said flange, with said directing and impinging means comprising a perforated baffle dividing said chamber into an inner compartment having a wall defined by said shroud means and passageways formed through said chamber first wall for communicating said outer compartment with said pressurized fluid.

Claim 4

Dependent Claim 16 words

The improved turbomachine of claim 2 wherein said perforated baffle is carried by said shroud means.

Claim 5

Dependent Claim 26 words

The improved turbomachine of claim 2 further characterized by and including means for discharging said pressurized fluid from said inner compartment to said motive fluid flow.

Claim 6

Dependent Claim 141 words

A turbine comprising a rotor, a plurality of blades carried by said rotor and extending generally radially therefrom, shroud means disposed radially outwardly of said blades and in close spaced relationship thereto for defining at least a portion of the outer boundary of motive fluid flow through said turbine, means to support said shroud means and define a chamber in cooperation therewith, means carried by said shroud means for dividing said chamber into inner and outer compartments, passage means formed through said support means for communicating said outer chamber with a source of pressurized fluid, said dividing means being perforated so as to communicate said inner and outer chambers and impinge said pressurized fluid against said shroud means whereby heating and cooling of said support means and said shroud means is achieved at reduced charge to said source of pressurized fluid.

Claim 7

Dependent Claim 141 words

A turbine comprising a rotor, a plurality of blades carried by said rotor and extending generally radially therefrom, shroud means disposed radially outwardly of said blades and in close spaced relationship thereto for defining at least a portion of the outer boundary of motive fluid flow through said turbine, means to support said shroud means and define a chamber in cooperation therewith, means carried by said shroud means for dividing said chamber into inner and outer compartments, passage means formed through said support means for communicating said outer chamber with a source of pressurized fluid, said dividing means being perforated so as to communicate said inner and outer chambers and impinge said pressurized fluid against said shroud means whereby heating and cooling of said support means and said shroud means is achieved at reduced charge to said source of pressurized fluid.

Claim 8

Dependent Claim 21 words

The turbine of claim 5 further characterized in that said dividing means comprises a thin insert secured to said shroud means.

Claim 9

Dependent Claim 53 words

The turbine of claim 5 further characterized by and including a circumferential row of vanes carried by said support means downstream of and closely spaced to said shroud means, and means for discharging the pressurized fluid from said inner compartment to the flow of motive fluid intermediate said shroud means and said vanes.

Claim 10

Dependent Claim 125 words

In a turbomachinery shroud having an inner surface for defining a portion of an annular motive fluid passage across a bladed rotor and of the type adapted for attachment to shroud support means in flow communication with a source of pressurized fluid, the improvement comprising: means carried by said shroud and forming a compartment outwardly of said inner shroud surface, a plurality of passageways for communicating said pressurized fluid with said compartment and adapted to impinge said fluid against said shroud as a plurality of high velocity jets for effective temperature control of said shroud, and passageways formed through said shroud for effluxing said pressurized fluid from said compartment to the motive fluid passage to establish a continuous flow of pressurized fluid through said compartment.

Claim 11

Dependent Claim 125 words

In a turbomachinery shroud having an inner surface for defining a portion of an annular motive fluid passage across a bladed rotor and of the type adapted for attachment to shroud support means in flow communication with a source of pressurized fluid, the improvement comprising: means carried by said shroud and forming a compartment outwardly of said inner shroud surface, a plurality of passageways for communicating said pressurized fluid with said compartment and adapted to impinge said fluid against said shroud as a plurality of high velocity jets for effective temperature control of said shroud, and passageways formed through said shroud for effluxing said pressurized fluid from said compartment to the motive fluid passage to establish a continuous flow of pressurized fluid through said compartment.

Claim 12

Dependent Claim 57 words

The improved turbomachinery shroud of claim 8 further characterized in that Said shroud includes an arcuate main body portion defining said inner surface and axially spaced upstream and downstream radially outwardly projecting circumferential flanges, said compartment defined by a thin member extending between and secured to said flanges, said impingement passageways comprising perforations in said thin member.

Claim 13

Dependent Claim 20 words

The improved turbomachinery shroud of claim 8 further characterized in that said efflux passageways are formed through said downstream flange.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-06-07	1974-12-07	1975-06-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-06-07	1978-12-07	1979-06-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-06-07	1982-12-07	1983-06-08	$7700.00	Window Closed / Lapsed

Temperature controlled shroud and shroud support

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