US1652085A - Steam turbine - Google Patents

Description

Dec. 6, 1927. 1,652,085

A. -W. BENNETT STEAM TURBINE Filed Dec. 192s z'sheets-sneet 1 Dec. 6, 1927.

A. w. BENNETT STEAM TURBINE elf of both of the said nozzles.

Patented Dec. 6,1927.

Amaze w. semen, or New erase; assess-cut.

' srnhnruanmna tiicaeon filed emeter 23,]i2tf' sears). 156,586, f

v This invention relates to an improvement in steam turbines' jand has' fo'ri itsobject the production oii a sihiple:, compact, and efficient steam -tu'rbine constructed with particular reference tosin i'plicity' of control.

With this object in view,v my invention "consist's'in a steam turbine characterized by disk-like rotor -lniving aserie's of buckets formed upon ea'chof as opposite 'faces,,a rater-fixture formed with two series of steam-reti'irn guides and two "steam-nozzles a'nd positionedadjacent the opposite "races of the iot'or, so that one of the saidseries of returinguides and one ot the said nozzles will act iip'onea'ch face ofthe rotor, a passage connected to a steani manifoldfor supplying steam to both of the saidno'zziles, and a valve for governing the entry of steaminto the said passage forthe concurrent control In the accompanying drawings:

Fig." 1 is a View in sideelevat-ion of a steam turbine constructed in accordance with my invention;

Fig. 2 is an enlarged vertical central sectional View thereof on the line 2-2 of i Fig. 1;

Fig. 3 is a broken plan View partlyin section showing the rotor and two stator-fix ture members in section; and

Fig. 4 is two complementary stator-fixture" members detached.

In carrying out my invention, as herein shown, I provide the steam-turbine case 10 with a flanged inlet-port 11 leading into a ring-like steam-manifold 12 formed integral with the case 10. This steam-manifold serves to supply steam to a number of corresponding pairs of stator-fixture members, more or less in number, a description of one pair serving for all.

The inner wall 13 of the manifold 12'is formed with a passage 14 for the reception of: the threaded shank 15, of a stator-fixture member 16 constituting one of a comple mentary pair, the shank 15 being secured in place in the nut 17. 7

The outer end of the shank is formed with a rounded, circular, ofi'set seat 18 with which a valve-washer 19, mounted at the inner end of a valve-stem 20, co-acts. The said valvestem is provided with a hand-Wheel 21-and is threaded as at 22 for coaction withthe internal threads ofa valve-bonnet 23 mountwall 13 by means of a lock-,

provided" withra packing-gland 2,5, to

"prevent the'jescape'of steam past the valvej Extending "through the .stator-iiXture eagia theoaie'r wan 24 of the manifold 12 7 member .16 is"a substantially S shapedpas-' j sageae le'aiding inward through the shank 15-, thence outward and again inward to the imjierraee of'the member, where it registers i'viFth' an jL-shapedpassage 27 formed in a 'sta torfixture member 28 complementing the meniber "16, towhich it is secured by bolts 29 1) passing through holes 30 formed in the respective members. I i

r By reierence to Fig. 2 of the drawings, will-be seenthat the S-shaped passage 26' of thest'atorenieiiiher 16 and the L-shaped pas- 27 of the stator me'mher 28 efiect censuses one passage bowed outward around the periphery er the turbine rotor "31 whieh,as showmis formed-upon each of its" opposite faces, near its periphery, with a series of buckets 32 and 33 respectively.

For the purpose of directing steam into' the buckets 32, the steam-passage 26 of the stator-member 16 is intersected by a passage '34:, which in effect constitutes one of the nozzles of my improved turbine, the orifice 35 being in line'with, the inner edges of the y buckets, as is'the common practice, so that a View in 1ns1de elevation of thethe steam initially impinges against the inner ends of the buckets 32. and is by them deflected into the return-guidesv 36 of the stator-member I6'by means of which the jet of steam is caused to repeatedly impinge I and reimpinge against the buckets 32 as they pass by the member.

Similarly, the buckets 33 of the rotor 31 are acted upon by the steam which flows out of the L-shaped passage 27 of the member 28, through a passage 37 corresponding to the passage 34, whichhas its orifice 38 located with respect to the buckets 33 in the same manner as that of the orifice 35, with the exception that it is on the opposite side of the rotor. v V

\Vhile I have shown and described the members '16 and 28 as separate elements, I wish to have it understood'that they may be formed in one piece, though I prefer the conthe rotor Slby means of a single valve,

steam front the said thereby not only securing the advantages of siu'iplitied control, but great] reducing the complexity of the turbine by ispensing with the need for two steam manifolds, as is necessary in prior turbines of the same general type.

I claim: a 1. A steam turbine, comprising a casing; a rotor-clmmber formed therein; a steammanifold chamberalso formed in said casing adjacent the said rotor-chamber; a partition all between the two said chambers; a rotor mounted in said rotor-chamber; a two-part stator-tixture formed independent of the casing and having its parts respectively located within the casing on the opposite sides of the vrotor and each provided with a nozzle for directing steam against the adjacent face of the said rotor; at steam-passage traversing the two-part stator-fixture and passing through the said partition-wall; and a valvestem and closure for controlling the flow of manifold to the said nozzles. i 2. A steam turbine, comprising a casing; a rotor-chamber formed therein; a steammanifold chamber also formed in said casing adjacent the said rotor-chamber; a partitionwall between the two said chambers; a rotor mounted in said rotor-chamber; a stator-fixture adapted to straddle the rotor and having nozzles located on opposite sides thereof; a hollow shank formed on the said passing through the said stator-fixture and part-itionall; a steanrpassagc formed in the said stator-fixture for connecting the said hollow shank with the said nozzles; a valve stem mounted in the outer wall of the manifold in line with the said hollow shank; and a closure carried by the said stem for coaction with the outer end of the hollow shank for controlling the flow of steam from the manifold. to the said nozzles.

3. 111 a steam turbine, the combination with the rotor and steam'manifold chamber thereof of an independently-formed statoriixture adapted to straddle the periphery of ALONZO W. BENNET'IX from the said manifold to the r

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