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1 Feb. 12, ,483,605 A. T. KASLEY STEAM CHEST CONSTRUCTION FOR TURBINES Filed. Oct., 4, Sheets-Sheet Z2s2 2. N 23-A % 3 S S4 3. f 2 %. 3 2 & E 337 S/6 SNSNAE N SNSSNN a 5ff 2. Sa Azo / 4771 Sag NWentor

2 Feb. 12, ,483,605 A. T. KASLEY STEAM CHEST CONSTRUCTION FOR TURBINES Filed Oct. 4, Sheets-Sheet 2 W 7 ÉE. &x. 4 NG N o al N Y sy 4.7hase NWenior 5 - tga Attorney

3 Patented Feb. 12, ,483,605 UNITED STATES PATENT OFFICE. ALEXANDER. T. KASLEY, OF ESSINGTON, PENINSYLVANIA, ASSIGNOR TO WESTING HOUSE E.ECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL W.A.N.A. STEAV-CEES CONSTRUCTION FOR TURBINES. Application filed October 4, Serial No. 505,276. To all whom, it may concern: more detailed understanding of my inven Be it known that I, ALEXANDER. T. KASLEY, tion, I show the wall of a turbine stator at a citizen of the United States, and a resident 10, provided with fixed blading 11 and sur of Essington, in the county of Delaware and rounding a spindle 12 provided with moving State of Pennsylvania, have invented a new blading 13. A primary nozzle block, 14 and 60 and useful Improvement in Steam-Chest a secondary nozzle block 15 of any desired Constructions for Turbines, of which the fol construction face the moving plates 13 which lowing is a specification. are, for example, of the impulse type. My invention relates to a steam chest con A steam chest 34 surmounts the turbine struction for turbines and it has for its ob and is formed of a flat upper plate 35 and 65 ject to provide apparatus of the character a similar lower plate 16, these plates being designated, and shall be simple, compact and formed, for example, of ordinary boiler iron. inexpensive in construction and effective in A side wall or hoop 17, taking for example, operation. - the form of a forged ring with planed edges, In the accompanying drawing, Fig. 1 is is clamped between the plates 35 and 16 and 70 an end view of a turbine, partially in section by bolts and preferably the edges of and partially in elevation, and having a the ring 17 are sealed by means of copper steam chest applied thereto constructed in wire gaskets as has for many years accordance with one form of my invention been common in locomotive steam chest prac and Fig. 2, is a detail sectional view of a tice where slide valves are employed. 75 modification of the steam chest construction The nozzle blocks 14 and 15 together form shown in Fig. 1. a nozzle deck abutting against the lower sur It is well known that steam turbines are face of the plate 16 and they are fastened di ordinarily provided with steam chests from rectly to said plate as by studs -, the which the steam is admitted to primary and steam chest thus forming the main support secondary nozzle blocks by means of appro for the steam nozzles. priate control valves. The steam chests A primary valve port 21 is provided in which have heretofore been constructed for the plate 16 and an additional primary valve this purpose have in general taken the form port. 22 is provided in alinement there with of rather complicated and expensive cast in the upper plate 35. These valve ports are ings, inasmuch as it has been usual to incor appropriately bushed, as is common in the porate complicated valve structures in the art, and receive a hollow spool valve 23 un body of the casting. - - der the control of suitable operating means In accordance with the present invention, 24 and a guide member 26 so that the spool 90 I provide a steam chest of simple and inex valve 23 substantially simultaneously con pensive type in that two flat plates of boiler trols the flow of steam through the ports 21 iron or plate steel are cut to appropriate size and 22. as is usual in balanced valve prac and mounted together with a side-wall struc tice. It will be obvious that steam flowing ture therebetween to make up the body of from the steam chest through the port the steam chest. Aligned valve ports are into the space under the bonnet 25 is per formed in these two plates and the entire mitted to flow through the interior of the structure is fastened directly to the nozzle spool valve 23 to the nozzle block 14 into deck with bonnets surmounting the upper which the steam admitted through the port valve ports. Spool valves are placed in the 21 flows directly. respective sets of aligned valve ports and In like manner, secondary valve ports 27 appropriate means are provided for permit and 28 are associated with a secondary valve ting the flow of steam admitted under said member 29, a bonnet, and a guide men bonnets through said chest structure to the ber appropriate nozzle blocks. Steam is admitted to the valve chest struc By this construction, expensive and special ture through an opening 32 in the upper castings are entirely avoided and further plate and a pipe 33 having a flanged end more the danger of hidden flaws is largely fastened directly to the plate 35 as by suit eliminated by the use of rolled or forged abe studs. - metal. Having thus described the arrangement of Referring to Fig. 1 of the drawing for a steam chest constructed in accordance with

4 ge my invention, the operation thereof will be obvious. The steam chest is normally filled with steam at boiler pressure and upon open ing of the primary valve, either by hand or by the governor, steam flows directly to the primary nozzle block 14 through the port 21 and indirectly through the port 22 and the interior of the spool valve 23. In like manner the opening of the secondary spool alve 29 admits steam directly to the second alry nozzle block 15 through the port 27 and indirectly through the port 2S and the in terior of the spool valve 29. The cost of the stock material for the con struction of a steam chest of the character indicated is trivial and the machine work is of the most elementary character so that it is an easy matter to construct a steam chest of any desired size or shape without the use of expensive patterns and castings. All parts are of readily ascertainable and de pendable strength so that the danger of fail ure by explosion is largely minimized. By the usual lagging material, a smooth and pleasing external ap)earance is secured. Referring to the form of my construction shown in Fig. 2, top and bottom plates 35 and 16 are employed as before, but the side wall construction takes the form of a forged channel ring 40 having the flanges thereof joined to the plates 35 and 16 as by rivets Primary and secondary valves are pro vided as before in suitable bonnets 25 and, the spool valves 42 and 43, however, be ing of the simple spool type, rather than of the hollow type. A set of hollow stilds surrounds the primary valve and penetrates both the upper and lower plates of the steam chest and also the nozzle deck so that the openings therethrough furnish communication be tween the space under the bonnet 25 and the interior of the primary nozzle block. These studs are preferably expanded in place in any desired manner similar to boiler tube practice and they are thus not only readily rendered steam tight, but they also serve to firmly join the upper and lower walls of the steam chest and to firmly attach the nozzle lock to the steam chest. In like manner, the secondary valve 43 is associated with hollow studs form ing passages between the space under the bonnet and the interior of the secondary nozzle block. Steam is shown as admitted to the chest in Fig. 2 through the lower plate thereof, as at 46. The operation of the structure thus shown will be obvious. Upon the opening of the primary valve, steam flows directly through the lower port thereof and indirectly through the upper port to the space under the bonnet 25 and downwardly through 1483,605 studs and into the interior of the primary nozzle block and likewise with re spect to the Secondary valve. It will be obvious that steam may be ad mitted to the steam chest either through the top or bottom thereof or through the side wall with but slight modification of the machining operations and without the necessity of expensive special patterns and castings. Thus steam may be admitted through the top of the steam chest of Fig. 2 as shown in dotted lines at 47. While I have shown my invention in but two forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed there upon as are imposed by the prior art or as are specifically set forth in the appended claims. What I claim is:- 1. In a pressure chest construction for fluid pressure turbines, the combination with an outer plate, of an inner plate, a sealing wall structure therebetween to form a closed chamber. aligned valve seats in said two plates, a spool valve operable in said seats, and means providing a path for fluid flow for the fluid passed through said outer plate to the inner side of the inner plate. 2. In a steam chest for steam turbines, the combination with an outer plate, of an inner plate, a side Wall structure fastened between said plates, aligned valve ports in said two plates, the port in said inner plate opening to a stealm nozzle and the port in said outer plate opening within a bonnet not int ed over the port in said outer plate, a spool valve operable to close said ports substan tially simultaneously, and means providing a steam passage from within said bonnet, to said steam nozzle. 3. In a steam chest for steam turbines, the combination with an outer plate. of an in ner plate, a sidewall structure fastened be tween said plates, aligned valve ports in said two plates, the port in said inner plate opening to a steam nozzle and the port in said outer plate opening within a bonnet seated over the port in said outer plate, a spool valve operable to close said ports sub stantially simultaneously, and means pro viding a steam passage from within said bonnet to Said steam nozzle, through said steam chest. 4. In a steann chest for steam turbines. the combination with an outer plate, of an inner plate, a sidewall structure fastened between said plates to form a closed cham ber, aligned valve ports in said two plates, a bonnet seated over the port in said outer plate and the port in said inner plate open ing into a nozzle block, hollow studs pene O 90 Us OO

5 0. s ,605 trating said plates adjacent said valve seats, hold said structure to said nozzle block, and the openings in said studs communicating means for admitting steam to said boxlike with the interiors of said bonnet and of said structure. nozzle block respectively, and a spool valve 10. In a steam chest construction for adapted to control the steam flow through steam turbines, the combination with an said ports. outer plate, of an inner plate, a side-wall 5. In a pressure chest construction for structure fastened between said plates to fluid-pressure turbines, the combination define a boxlike structure, aligned valve with an outer plate, of an inner plate, a ports in said outer and inner plates, a spool sealing wall structure therebetween to form valve seated in said ports, a nozzle block a closed chamber, aligned valve seats in seated against said inner plate and having said two plates, a spool valve operable in an opening thereinto aligning with said said seats, and means for admitting the inner valve port, a bonnet fastened to said fluid supply through one of said plates. outer plate covering the port therein, hollow 6. In a steam chest construction for steam studs adjacent said valve and penetrating turbines, the combination with a boxlike said inner and outer plates and said nozzle structure, of aligned valve ports in the top block, the openings in said studs communi and bottom thereof. a bonnet covering the cating with the space under said bonnet and port in the top, a spool valve seated in said with the interior of said nozzle block, said ports, means for conveying the steam re studs being expanded in place to firmly en leased through the top of said valve when gage said nozzle block to said inner and open to the bottom of said chest, and means outer plates, and means for admitting steam for admitting steam to said chest. to said chest through one of said plates. 7. In a steam chest construction for steam 11. In a steam chest construction for turbines, the combination with a boxlike steam turbines the combination with a box structure having aligned valve ports in the like structure having two sets of aligned top and bottom thereof, of a spool valve valve ports in the top and bottom thereof, seated in said ports, a bonnet surmounting respectively, of a primary spool valve seated said top and covering the port therein, hol in one of said sets of ports and a secondary low studs penetrating said top and bottom, spool valve seated in the other of said sets the openings therein communicating with of ports, a primary nozzle block and a sec the space beneath said bonnet, and means ondary nozzle block forming a nozzle deckin for admitting steam to said chest. contact with the bottom of said structure, the 8. In a steam chest construction for steam lower primary valve port aligning with an turbines, the combination with a boxlike opening into the primary nozzle block and structure having aligned valve ports in the the lower secondary valve port aligning top and bottom thereof, of a spool valve with an opening in said secondary nozzle seated in said ports, a bonnet surmounting block, respectively, a bonnet surmounting said top and covering the port therein, and said structure over each of said outer valve hollow studs penetrating said top and bot ports, respectively, a set of hollow studs tom, and expanded into openings there adjacent each of said valves, respectively, through. said studs penetrating the top and bottom 9. In a steam chest construction for steam of said structure and said nozzle deck, the turbines, the combination with a boxlike openings through the studs associated with structure having aligned valve ports in the the primary valve communicating with the top and bottom thereof, of a spool valve space under the primary valve bonnet and seated in said ports, said structure sur with the interior of the primary nozzle and mounting a nozzle block having an opening similarly with respect to the studs associ thereinto aligning with said bottom valve ated with the secondary valve, said studs port, a bonnet surmounting said structure being expanded in place to firmly engage over said top valve port, hollow studs adja said structure with said nozzle deck, and cent said valve and penetrating the top and means for admitting steam to said boxlike bottom of said structure and the nozzle structure. block, the openings in said studs communi In testimony whereof, I have hereunto cating with the space under said bonnet subscribed my name this 28th day of Sep and with the interior of said nozzle block, tember, said studs being expanded in place to firmly ALEXANDER. T. KASLEY