Patent US3933133A successfully refreshed from Google Patents.
US3933133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating cup fuel injector
Assignee: Sundstrand Corp
•
Filing: 1973-11-19
•
Granted: 1976-01-20
•
Expires: 1993-11-19
Abstract
Abstract An improved fuel injector for a turbine, the injector comprising a conical cup adapted to be rotated and a means for depositing fuel on the internal surface of the cup. When the cup is rotated the fuel is caused to be spread uniformly over the internal surface of the cup as a thin film due to centrifugal force. An air blast is provided externally of the cup and parallel thereto, whereby the fuel reaching the lip of the cup is atomized and directed outwardly at a controlled spray angle. During turbine ignition an air blast is not utilized, thereby allowing a constant spray angle of 180 degrees and permitting the accurate fixed location for the ignition system.
Inventors
- 👤 Jack R. Shekleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:37
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/04; F23D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
245 words
In a turbine having a combustion chamber, a variable fuel injector comprising: an annular flange communicating with the combustion chamber; a frusto-conical cup rotably mounted within said flange whereby the outwardly diverging end of said cup is disposed within the combustion chamber and a throat is formed between said cup and said flange; means secured to one end of said cup and adapted to rotate said cup; a hollow tube extending coaxially through said rotating means into said cup, the other end of said tube being disposed intermediate the ends of said cup, whereby fuel is deposited within said cup through said tube; means for generating a high velocity air stream through the throat and over the outer lip of said cup, said air stream being substantially parallel to the axis of rotation of said cup; an ignition means mounted within said combustion chamber in substantially normal orientation to the axis of rotation of said cup and in complementary relationship to the lip of said cup, said air generating means and said cup rotating means being operably so that when said cup is first rotated fuel on the inner surface of said cup is caused to leave said cup at a constant spray angle of 180 degrees without significant air blast to allow contact with the ignition means and, after ignition, to provide a high velocity air stream, whereby the fuel and air are intimately mixed and assume a spray angle of less than 180°.
Claim 2
Dependent Claim
245 words
In a turbine having a combustion chamber, a variable fuel injector comprising: an annular flange communicating with the combustion chamber; a frusto-conical cup rotably mounted within said flange whereby the outwardly diverging end of said cup is disposed within the combustion chamber and a throat is formed between said cup and said flange; means secured to one end of said cup and adapted to rotate said cup; a hollow tube extending coaxially through said rotating means into said cup, the other end of said tube being disposed intermediate the ends of said cup, whereby fuel is deposited within said cup through said tube; means for generating a high velocity air stream through the throat and over the outer lip of said cup, said air stream being substantially parallel to the axis of rotation of said cup; an ignition means mounted within said combustion chamber in substantially normal orientation to the axis of rotation of said cup and in complementary relationship to the lip of said cup, said air generating means and said cup rotating means being operably so that when said cup is first rotated fuel on the inner surface of said cup is caused to leave said cup at a constant spray angle of 180 degrees without significant air blast to allow contact with the ignition means and, after ignition, to provide a high velocity air stream, whereby the fuel and air are intimately mixed and assume a spray angle of less than 180°.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |