Devices for reducing deflection and stress in turbine diaphragms

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural distributing means immediately upstream of runner

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Details

415193, 4152092, 4151701, F01D 904

Patent

active

050245813

ABSTRACT:
A turbine comprising at least one stage (20) having a diaphragm (1) which is split in two along a diametrical plane and which includes an outer ring (3) and an inner ring (6) interconnected by virtue of (10 and 11) serving to guide the turbine fluid, the downstream face (14) of the outer ring (3) being pressed against a ring (19) of the turbine stator (4), the diaphragm (1) being provided with sealing (17) providing sealing between the outer ring (3) and the stator (4), the turbine being characterized in that the sealing (17) are disposed on the outer edge (15) of the outer ring (3), in that the downstream face (14) of the outer ring (3) is provided with a land (18) at a distance from the outer edge (15) and bearing against the ring (19) of the stator (4), and in that communication (22, 27, 27') are provided for providing communication between the space (25) situated between the land (18) and the sealing (17), and a space downstream from the diaphragm (1) with the pressure in the space being less than the pressure P.sub.1 existing over the upstream face (26) of the diaphragm (1).

REFERENCES:
patent: 1154777 (1915-09-01), Kieser
patent: 1242578 (1917-10-01), Moore
patent: 1352277 (1920-09-01), Junggren
patent: 1549209 (1925-08-01), Nobs
patent: 2905434 (1959-09-01), Hertl
patent: 3021110 (1962-02-01), Rankin et al.
patent: 3169748 (1965-02-01), Howard et al.

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