US1923251A - Gas or steam turbine casing - Google Patents

Description

Aug. 22, 1933 G. BAUER ET AL I (:15 OR STEAM TURBINE CASING Filed May 23. 1932 a? zM M Patented Aug. 22, 1933 PATENT OFFICE 1,923,251 GAS OR STEAM TURBINE CASING Gustav Bauer, Hamburg, and Carl Schmieske, Bremen, Germany Application May 23, 1932, Serial No. 613,106,

and

(Granted The invention relates to a new casing con-' struction for turbines, in particular exhaust steam turbines with steam supply and exhaust conduits on the same side. This arrangement in volves great axial length in order to provide room for attention to the flanged connections to the supply and exhaust conduits. In order to reduce the total length it has already been proposed to provide a single internal dividing wall for the supply and exhaust cross sections of the turbine casing. This idea is further developed by the invention by the outer supply and exhaust conduits which are fastened to and not integral with the casing also being provided with a common dividing wall and having a common inner joint-making surface. at the place of junction with the casing.

of junction of the supply and exhaust conduits.

are not of considerable importance because steam pressure reigns on both sides. Where vacuumpperation is employed the vacuum can never be reduced by inward leakage of air at the intermediate flange, whereas hitherto two flanges needing to be kept tight were present'at this place, through which air could leak.

In our improved construction we provide a valve in the common dividing wall between the attached supply and exhaust conduits or in the inner common dividing, wall in the casing, for

controlling the path of the steam according to requirements.

In the accompanying drawing:

Fig. 1 is a longitudinal section through an exhaust turbine and casing, and in which a control valve is employed in the partition be-. tween the supply and exhaust conduits, and

Fig. 2 is a section similar to Fig. 1, but showing the control valve in casing rather than in the partition between the conduits.

In both of the forms illustrated the steam enters the turbine casing at 'a and the exhaust steam flows out to'the condenser at b.

The supply and exhaust steam conduits are in Germany under the provisions of sec. 14, act of March 2, 1927; 357 0. G. 5)

5 Claims. (01 25339) part or all of the way between them.

the partition of the.

May 22, 1931 arranged adjacent to each other in such a manner that they have a common internal dividing wall or partition f. The adjoining supply and exhaust conduits g, it have a common internal flange joint 2' which can be arranged in various 0 ways according to location conditions. They also have a common dividing wall k extending In Figure 1 a flap valve m is arranged in the dividing wall between the supply and exhaust conduits, which with theturbine in operation separates the steam .supply path from its exhaust path and when the turbine is out of action connects them.

The valve m is shown as a comparatively thin flat plate mounted substantially in the plane of the dividing wall so that when in the position shown in solid lines it does not interfere with the free flow of the fluid to and from the rotor. The valve is mounted to oscillate about an axis substantially at right angles to a plane including the axis of the rotor and when moved to the dotted line position substantially closes the supply passage and lies at an angle to the normal direction of flow in said passage so 'as to deflect the fluid directly into the passage, and the turbine will be free to stop, run idle, or be rotated in either direction from any part of the mechanism to which it is connected.

. In Figure 4, in contradistinction to Figure l, 5 the valve 11. is arranged in the internal dividing wall in the turbine casing.

Whatwe-claim is:-

l. A steam or gas turbine having a rotor, a casing enclosing said rotor and having a main supply passage-to one end of the rotor and a main exhaust passage from the opposite end of the rotor, said passages having a common dividing wall, separate supply and exhaust conduits secured to said casing and having a common dividing wall making a joint with the dividing wall of said casing, one of said dividing walls having an opening therethrough, said opening having a valve seat along one edge thereof facing toward said exhaust conduit, and a valve seat along the opposite edge facing. toward said supply conduit, and a valve pivoted intermediate of its edges within said opening and having portions for engagement with said seats simultaneously, said valve. when open being adapted to permit free flow from the supply conduit to the exhaust conduit.

2. A steam or gas turbine having a rotor, a casing enclosing said rotor and having a main no supply passage to one end of the rotor and a main exhaust passage from the opposite end of the rotor, said passages having a common dividing wall, separate supply and exhaust conduits secured to said casing and having a common dividing wall making a joint with the dividing wall of said casing, one of said dividing walls having a valveport permitting freefiow from the supply conduit to the exhaust conduit, and a flap valve pivoted midway between its edges and in the plane of said dividing wall and within said port and adapted to oscillate in one direction only to open position, said dividing wall having valve seats adjacent opposite edges of said port for engaging with and limiting the movement of opposite edge portions of said valve when the latter is in closed position.

3. A steam or gas turbine having a rotor, a casing enclosing said rotor and having a main supply passage to one end of the rotor and a main exhaust passage from the opposite end of the rotor, said passage having a common dividing wall provided with an opening therethrough, said opening having a valve seat along one edge thereof facing toward said exhaust conduit, and 'a valve seat along the opposite edge facing toward said supply conduit, and a.

valve pivoted intermediate of its edges within said opening and having portions for engagement with said seats simultaneously, said valve when open being adapted to permit free flow from the supply conduit to the exhaust conduit.

4. A steam or gas turbine having a rotor, a casing enclosing said rotor and having a main supply passage to one end of the rotor and a main exhaust passage from the opposite end of the rotor, said passages having a common dividing wall, separate supply and exhaust conduits secured to said casing and having a common dividing wall making a joint with the dividing wall of sai casing, one of said dividing walls having an opening therethrough, said opening having valve seats along opposite edges thereof, and a valve having its axis extending at right angles to a plane including the axis of said rotor and disposed in the plane of the last mentioned wall, said valve being mounted to oscillate to permit or prevent free flow from the supply conduit to the exhaust conduit.

5. A steam or gas turbine having a rotor, a casing enclosing said rotor and having a main supply passage to one end of the rotor and a main exhaust passage from the opposite end of the rotor, said passage having a common dividing wall provided with an elongated substantially rectangular opening therethrough, and a valve mounted in said opening with its axis substantially at right angles to a plane including the axis of the rotor, said valve being mounted to oscillate about its axis and to prevent or permit free flow from the supply conduit to the exhaust conduit, and said valve being adapted when in open position to engage the opposite wall of the supply passage and act to substantially close said passage and to deflect the supply from said supply passage into said exhaust passage.

GUSTAV BAUER. CARL SCHMIESKE.

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