US2190170A - Cylinder supporting arrangement - Google Patents

Description

, CYLINDER SUPPORTING ARRANGEMENT Fied April 6, 1958 7* l INVENTOR Cuneuce B. nnrasu.

ATTORNEY Patented Feb. 13, 1940 i UNITE gs'la'les 2,190,170 CYLINDElasUPPoRTING ARRANGEMENT Clarence B. Campbell, "Swarthmore, Pa., assigner to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pal., a corporation ol' Pennsylvania Application April 6,1938, serial No;` 200,351

f f I y claims.y (cl. 24S-:2)

My invention relates to supporting means for apparatus subject to changes in` temperature resulting in expansion and-contraction thereof, and more particularly to meansfor securing the 5 apparatus to its support for limited movement of the former relative to the latter.

It has been proposed to support turbines and similar structures by lugs extending horizontally from the casing'thereof and resting upon pedestals, and to interconnect the lugs and pedestals in suchy a manner that the former may move transversely relative Vto the vlatter upon expansion or contraction of the casing. One form of such connectionv between the lugs and pedestals consisted of a transversely extending key imrnovably` secured to and projecting,k

from the underside of each lug, and closely but slidably received in a transversely extending groove or keyway in the upper surface of the n pedestal. Theoretically, this permitted the lugs to slide laterally on the pedestals towards and away from each other as the casing expanded or contracted. In actual practice, however, it has been found that upon heating and expansion of the casing, the lugs, due to uneven heating thereof, tend to twist about a vertical axis. This twisting, even when of relatively small degree, is sufficient to cause binding of the keys in the keyways, thus preventing free transverse movement of the lugs on the pedestals.

In accordance with my invention I provide a novel key connection between the lugs and pedestals permitting the lugs to twist and at the same time freely slide laterally relative to the pedestals.

Therefore, an object of myl invention is the provision of connecting means between the supporting lugs of a casing and the pedestals therefor, permitting free twisting movement and lateral sliding movement of the lugs relative tothe pedestals upon expansion and contraction of the casing.

A further object of my invention is the provision of connecting means between thesupporting lugs of a turbine casing and the pedestals therefor, which will not bind upon distortion of the lugsdue to uneven heating and expansion of the latter.

These and other objects are eected by my invention as will be apparent from the following description and claims, taken in connection with the accompanying drawing forming a part of` this application, in which: l

Fig. 1 is a plan view inelevation showing the high pressure and a portion of the low vpressure cylinders of a two-cylinder tandem turbine gen-` erator unit.- y l Fig. 2 is a side view in elevation of the structure of Fig. 1;

Fig. 3 is an enlarged sectional View taken along [5l the line III-III of Fig. 1; and,

Fig. 4 is an enlarged sectional view taken along the line IV-'IV of Fig. 1.

' In the drawing, numeral I indicates thehigh" pressurecylinder, and numeral IIv the low pres- 0l sure cylinder, of a two-cylinder tandem turbine generator unit. `The high pressure cylinder I0 yis provided with a steam chest I2 of conven-` tional structure, providing for the` admission of operating steam to said cylinder; the steam admission being controlled by governor mechanism I3. The exhaust steam from the high pressure cylinder p-asses through conduit I t to the low I 9 are continuations of the flanges connecting the 251 upper and lower halves of the cylinder casing. The lugs I6 Vand Il, at the coupling end of the cylinder, rest upon a fixed` `pedestal 2l, which, preferably, is a portion of the low. pressure cylinder base. end of the high pressure cylinder, rest upon a sliding pedestal 22. Each of the four lugs is connected to its pedestal by a novel key arrangement 24.

Each of the lugs |6,l`l, I8 `and I9 is provided 35 with a vertical bore 26 `extending entirely therethrough. Mounted in each bore is asleeve member 21, of a cylindrical form, and preferably pro-` vided with a flange 28 `at the upper end thereof, which flange is received in a countersunkrecess 40 29 provided therefor in the upper surface of each` lug. The sleeve 2l is of such a length as to project below the bottom surface of the lug a material distance, as at 21a. It will be noted that i while the lower half of each lug, that is, the part 45 carried by the lower half of the casing, closely lits the sleeve 21, the upper half of the lugfwhich is` integral with theupper half of the casingloosely ts the sleeve, whereby some relative movement i The pedestals 2| and 22'have yflat horizontal upper surfaces, said surfaces being provided with transversely extending grooves 3 I, of such dimensions as to slidably receive keys 32. Each key 32 65 The lugs I8 and I9, at the opposite 30 '2 :.4 inf, 7,

is provided with a centrally located vertically extending hole 32a closely receiving the projecting portion 21a of the sleeve 2l. Studs 33 extend vertically from the pedestals at the centerline of the grooves, passing through the sleeves 21. These studs are of a diameter materially less than the internal diameter of' the sleeves 2 whereby the lugs and the sleeves mounted therein, together with the keys 32, may move transversely in the grooves 3l Ya limited distance. Preferably, the outer ends of the studs 33, which extend above the upper surface of the lugs, are provided with means, such as a washer 34 and nut 3B, for preventing material movement of the lugs vertically with respect-to the pedestals.v

It will be seen that bythis construction the lugs may twist in a horizontal plane about the studs 33 due to the cylindricalconnection between the lugs and the sleeves 2l. Preferably, the portion 210, of the sleeve 2l, which projects below the lower surface of the lugs and is received in the key 32, is cylindrical in the same manner as the remainder of the sleeve 2l. With such a construction, twisting or" the lugs about a vertical axis may occur by turning of the portion 21a of the sleeve El in the hole 32a, of the key 32, even if binding of the lugs on the sleeves occurs due to uneven expansion'of the upper and lower halves of the lugs. n

While I haveshown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing kfrom the spirit thereof, and I desire,

therefore, that only such limitations shall ber placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is:

l. In combination, mechanism having a casing subject to changes in temperature causing it to expand and contract, a pedestal at each endet the casing, lugs integral with the casing and resting on the pedestals for supporting said casing, and means connecting the lugs and pedestals for transverse and twisting movement of the former relative to the latter in a horizontal plane while preventing relative longitudinal movement o said lugs and pedestals. 1

2. In combination, mechanism having a casing subject to changes in temperature causing it to expand and contract, a pedestal at each end of the casing, lugs integral with the casing and resting on the pedestals for supporting said casing,

.,. and vertically extending cylindrical members connecting the lugs and pedestals for transverse and twisting movement of the former relative to the latter in a horizontal plane while preventing relative longitudinal movement of said lugs and pedestals.

3. In combination, mechanism having a casing` subject to changes in temperature causing it to exp-and and contract, a pedestal at each end of the casing, lugs integral with the casing and resting on the pedestals for supporting said casing, and means connecting the lugs and pedestals for transverse and twisting movement only of the former relative to the latter in a horizontal plane, said means comprising sleeves extending vertically through each lug and projecting a material distance therebelow, keys having holes therethrough rotatably receiving the projecting portions o-f the sleeves, said pedestals having transversely extending grooves in their upper surfaces slidably receiving said keys, and studs mounted in the pedestals and extending vertically through the sleeves, said studs being of a diameter materially less than the internal diameter of the n sleeves.

` 4. In combination, mechanism having a casing subject to changes in temperature causing it to expand and contract, a pedestal at each end of the casing, lugs integral with the casing and resting on the pedestals for supporting said casing, and means connecting the lugs and pedestals for 'transverse and twisting movement only of the iorrnerrelative to the latter in a horizontal plane, said means comprising members having upper cylindrical portions extending vertically through each lug and lower portions projectingy a material distance therebelow, keys rotatably receiving the projecting portions of the sleeves, said pedestals having transversely extending grooves in their upper surfaces receiving the keys for sliding movement of the latter therein, and means for limiting said sliding movement.

i 5. In apparatus including a casing subject to changes in temperature causing it to expand and contract, a pedestal at each end of the casing and lugs integral with the casingand resting on the pedestals for supporting said casing; means for connecting thelugs to the pedestals and com` prisingmembers having upper lug-engaging portions and lower key-engaging portions, said lugengaging portions extending vertically throughmembers having axial bores extending from end to end thereof, said bores and cylindrical portions being concentric, and studs mounted in the.

pedestals and extending vertically through said` bores, and the holes in the keys, said studs being of smallerA diameter than the bores and holes whereby sliding movement of the members and keys in the grooves is limited.

CLARENCE B. CAMPBELL.

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