Steam turbine with a rotary slide

Details Steam turbine with a rotary slide Steam turbine with a rotary slide

1994-01-12

1995-04-25

Kwon, John T.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Upstream of runner

415148, 415150, 13762531, F01D 1724

Patent

active

054093511

ABSTRACT:
A steam turbine includes a rotary slide for controlling steam throughput, particularly in combination with a steam offtake. The rotary slide has control slits formed therein. A stationary channel body has channel inlets formed therein with which the control slits cooperate for increasingly opening and closing the channel inlets depending on a direction of rotation of the rotary slide at the time. At least one roller bearing race is disposed between the stationary channel body and the rotary slide outside the vicinity of the control slits and the channel inlets, for reducing rotational friction. At least one of the control slits and at least one of the channel inlets is disposed at each of at least two separate orbits. One of the channel inlets is opened while others of the channel inlets to be opened remain closed, upon rotation of the rotary slide in a corresponding direction of rotation.

REFERENCES:
patent: 707727 (1902-08-01), Schulz
patent: 793540 (1905-06-01), Purvis
patent: 1291322 (1919-01-01), Wiberg
patent: 1544285 (1925-06-01), Trotter
patent: 1894117 (1933-01-01), Pollard et al.
patent: 2184661 (1939-12-01), Bentley
patent: 2186952 (1940-01-01), Bloomberg
patent: 3209537 (1965-10-01), Mock
patent: 3589829 (1971-06-01), Schetinin
patent: 3669562 (1972-06-01), McNally et al.
patent: 3860357 (1975-01-01), Grainger
"Der Drehschieber als Regelorgan fur Entnahme-Dampfturbinen" Berlin, 1966, pp. 185-190, Book 4, (The Rotary Slike as a Regulating Device for Pass-Out Steam Turbines), Speicher et al.
"Zur Entwicklung von Niederdruck-Dampfsteuer-organen, derzeitiger Stand und kunftige Moglichkeiten", Berlin, 1989, pp. 77-79, Speicher et al.

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