US1770776A - Locomotive cylinder structure - Google Patents

Description

July 15, 1930. L. w. vHANCE K LOCOMOTIVE CYLINDER STRUCTURE [www www/@2% July 15, 1930. w. HANCE I LOGOMOTIVE CYLINDER STRUCTURE Filed Sept. 14, 1928 8 Sheets-Sheet July 15, 1930- L. w. HANCE.- 1,770,776

LocoMoTIvE CYLINDER STRUC'VIURE Filed sept. 14. 1928 '8 sheets-sheet 3 July 15, 1930. L. w. HANCE f 1,770,776

LOCOHOTIVE CYLINDER STRUCTURE Filed sept. 14, 192e 8 sheets-sheet 44 July l5, 1930. I w HANCE 1,770,776

LOCOMOT IVE CYLI NDER STRUCTURE Filed Sept. 14, 1928 8 Sheets-Sheet 5 v L. w. HANCE 1,770,776

y LOCOMOTIVE CYLINDER STRUCTURE `Iuly 15, 1930.

Filed Sept. 14, 1928 8 Sheets-Sheet L. w HANCE 1,770,776

LOCMOTIVE CYLINDER STRUCTURE f Filed Sept. 14, 1928 8 Sheets-Sheet 7 July l5, 1930.

llll Il L. w. HANCE 1,770,776

LOCOMOTIVE CYLINDER STRUCTURE l Filed sept. '14, 1928 Patented July 15, 193@ rarest v,iguanacrsics s noooivrorivn oynrnnnnsmnuo'runn VApplication filed September 14, 1928. 'Serial No.7,30`6,042.

` lily invention relates to certain'improvements in compound locomotive cylinder structures of the three-cylinder type, in which the high pressure `cylinder is at the centre and the rloiv pressure cylinders are at each side of the centre beyond the frame of the locomotive. p i

One object of the invention is to so ydesign the structure that the mixing chamber Will extend over the central cylinder.

`Another object of theinvention is to so design the structure that the space under the centralcylinder Will be free of obstructions` A further object is to make the Walls of the passages leading from the lou7 pressure valve chests integral With the structure. Y These objects are-attained in the follovving manner, reference being had to the'accompanying drawings, in which: i

F l is a transverse sectional view illustrating a locomotive cylinder saddle for a three-cylinder compound engine', made in -a single casting and illustrating the features a of my invention,

Fig. 2 is a planV view of the cylinder structure; 'Y l 'Fig 3 is a sectional plan View on 33, Fig. l;

Fig. l is a sectional view on the line 4 4, Fig. l; v .n

Fig. 5 is a sectional view on the line 5 5, Fig. 1; e

6 is a transverse sectional view on the line c3-6, Fig. 2; n

Fig. 7 is aV sectional view on the line 7 7, i ig. il l Fig. 8 is a sectional view on the line S8, 2; i

Fig. 9 is a transverse sectional vie'wlillustrating a modification of the invention, Yin

which the structure is made in two pieces, one piece containing the central high pressure cylinder and one low pressure cylinder, and

' the other section containing the othcrfloiv pressure cylinders; and n y Fig. l0 is a sectional plan view on theline' l0-10, Fig. 9.

The cylinder structure shown in lis made ina single casting, which rests upon the line "lO is'. a steamV inlet passage leading to the lthe longitudinal frames lrof the locomotive as shown by dotted lines. The cylinder 2 inthe present instance, Vis a highpressure cylinderfand is Vlocated preferably above the tops ofthe main frames ofthe locomo- Y tive. The space under this cylinder is clear so as "to allow clearance for other mechanisms.

3-8ab are the low pressure cylinders which overhang the frames extending on each side thereof, as clearly shoivnin Fig. l. l isfa steam chest for the high pressure cylinder 2. AThis steam `chest is connected `by passages 5 at each end thereof VWith the ends of the cylinder 2, as clearly shown in Figs and 6. G 'Ga are the. steam chests ofthe lovv pressure cylinders 343s, respectively, and comm/uni-` cate with the cylinders through passages 7'.'

The mixing` chamber 8 extendsyover' theV central high pressure cylinder 2, as clearly 7 shown in Fig. l, and connects the exhaust pas-y vsages ofi the high pressure steam chest l With the intakepassages o-f the 10W pressure valve @heetst-6. '.By locating the mixing chamber over thecentralcylinder, the 'chamber can be of suflicient size to allovv for a muchV 'larger central cylinder'than is possible with the-'mixing chamber extending under the central cylinder. Furthermore, it allows for a'considerable ,truclrv clearance, which is essential in enginesof large capacity.

l 9 is a saddle which isshapedto'itthe boiler ofthe locomotive, and the smoke-box ofthe boiler is `cutaway toalloivthe central portion of thev cylinder structure to yextend into S5 the bottom of thesmolre-box. The location of the "mixing chamber in the smolre-box tends to prevent chilling of the-Walls ofthel mixing chamber. i

steam;V chest 4l of the high pressure cylinder,

' and the Walls of this passage are cast integral with the structure; The outer end ofthe passage is in posit-ion so that Vit can be `readily attached tothe steam supply pipeleading f from the boiler. j

Thewalls of the exhaustvpassa'ges 1l-`11a the low pressure cylinders are also cast-integral with the structure and alsov act to'rein'-k force the saddle 9, making a very rigid substantial structure, tree of all joints except the joint within the smoke-box. rlhese exhaust passages lead to the nozzle in the ordinary manner.

In Figs. 1, 2 and 3 the structure is shown as a single casting, but in some instances it may be desirable to make the device in two parts as shown in Figs. 9 and 10, in which instances the parting is at one side of the eentral cylinder 2 as indicated at both sections having flanges 12 which are secured together by bolts 13, the parting preferably being on the line oi one of the side frames so that the main casting containingthe central high pressure cylinder 2a and the low pres sure cylinder 3 rests direetly'on the trames 1, while the other cylinder casting 3b is securely bolted to the other section and lto the trame. ln this instance the parting is through a portion'of the mixing chamber as shown.

By extending the mixing chamber above the central cylinder 2, there is suiieient spare betweenthe Jfeet 14 which rest upon the frame oit' the locomotive and the central cylinder. There is a space between the central cylinder and the side cylinders, and also between the several valve chests and the mixing chamber. space likewise surrounds the exhaust passages, the tubular portion forming the exhaust passages, so that access maybe had to all parts ot the casting for inspection and repairs at all times.

I claim z- 1. The combination in a three-cylinder structure ot the compound type, ofV a centrally located high pressure cylinder and side low pressure cylinders; a valve chest tor each cylinder; a steam passage leading to the valve chest of the highpressure cylinder; exhaust passages leading from the valve chestsot the low pressure cylinders; and a mixing chamber extending over the highv pressure cylinder and communicating with the valve chest of said high pressure cylinder and the valve chests of the low pressure cylinders. Y

2.' The combination in a cylinder structure of the compound type, of a centrally lo-V cated cylinder above the frame or" the locomotive.; low pressure cylinders at each side ot the frame of the locomotive; a valve chest Jfor each of said cylinders; a mixing chamber ex* tendine' over the centrally located cylinder; al saddle formed integral with the cylinder structure; and tubes extending from the side valve chests to the saddlevin which are the exhaust passages, said tubes being integral with the cylinder structure. y

` 3. The combination in a lcylinderstructure of the compound type` ot a centrally located high pressure cylinder, said structure having low -aressure cylinders overhanging the :frame of the locomotive; a valve chest for each of said cylinders, said valve chests communicating with the ends of the said cylinders; a

mixing chamber extending over the central vcylinder and communicating with the valve chest ot the central cylinder and with the valvefchests ot the side low pressure cylinders; and a saddle, the central portion of said structure extending above the saddle and into the smoke-box of the locomotive.

4. The combination in a cylinder structure oi the compound type, of a centrally located high pressure cylinder, said structure having low `aressure cylinders overnanging the frame ot the locomotive; a valve Ichest for each of said cylinders, said valve chests communieating with the ends oi the said cylinders; a mixing chamber extending over the central cylinder and communicating with the valve chest of the central cylinder and with the valve chests of the side low pressure cylinders; and a saddle, the central portion of said str cture extending above the saddle and into the smoke-box of the locomotive, the underside ot the cylinder structure being above the traineand ot suliicient height to allowtruek clearance. Y

5. Thecombination in a. locomotive cylinder structure, of a central cylinder; side cylinders; a valve chest Jfor each of said cylinders, said valve chests communicating with each end of each cylinder respectively; a mixing chamber extending over the central cylinder, the feet of the structure resting on the side frames of the locomotive; an open space between the Jreet and the central evlinder, said open space extending between the central cylinder and the side cylinders and between the mixing chamber and one oi the side valve rhests at one end and between the valve chests on the opposite side; an inlet passage 'for one ot said cylinders; and exhaust passages for vthe other cylinders, the parts being so arrangedthat access may be had tothe space between the several parts of the cylinder structure. i

LAVVRENGE v T. {ANCE lul)

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