Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – By shaft speed or torque responsive means
Patent
1983-06-22
1985-08-13
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
By shaft speed or torque responsive means
415 90, F01D 136
Patent
active
045346992
ABSTRACT:
A turbine for operating on pressurized gaseous products of combustion resulting from the burning of coal and which gaseous products contain fly ash. The turbine includes a housing that supports a power take off shaft on which a rotor is mounted that includes a central circular plate that supports an equal number of first and second ring shaped discs on opposite sides thereof, with the first discs being of substantially greater diameter than the second discs. The second disc cooperates to define a number of first inwardly extending passages therebetween, and the second ring shaped discs cooperate with the first ring shaped discs to form second passages therebetween of substantially less width than the first passages. The pressurized gaseous products of combustion are discharged substantially tangentially onto the rotor to flow inwardly in a spiral path through the first passages to impart a first torque to the first ring shaped discs due to the frictional boundary layer drag to which the portions of the first ring shaped discs that define the first passages are subjected. A second torque is impacted to the rotor to augment the first torque as the gaseous products of combustion flow through the second passages at least in part at a velocity greater than that at which it exited from the first passages due to the narrower width of the second passages and in so doing imparting additional boundary layer drag to the rotor. The increase in velocity results in increased torque output and overall efficiency in operation. No appreciable side thrust is exerted on the power take off shaft due to there being a substantially equal flow of pressurized gaseous products of combustion on each side of the circular rotor plate. The first and second passages are of sufficient width that entrained particles of fly ash simply discharge therethrough. The discs are preferably of a high temperature resisting ceramic to permit operation of the turbine at a temperature greater than 2000.degree. F.
REFERENCES:
patent: 1445310 (1923-02-01), Hall
patent: 4201512 (1980-05-01), Marynowski et al.
patent: 4218177 (1980-08-01), Robel
patent: 4232992 (1980-11-01), Possell
patent: 4245463 (1981-01-01), Mansson et al.
Gas Turbine International, "Ceramics-Key to the Hot Turbine", (Jan.-Feb. 1973).
Babcock William C.
Garrett Robert E.
Pitko Joseph M.
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