US1896947A - Throttle for locomotives - Google Patents

Description

Feb.- 7, 1933. H. GLAENZER THROTTLE FOR LOCOMOTIVES Filed Nov. 19, 1951 2 Sheets-Sheet l l7; vezar,

Feb. 7, 1933. GLAENZER I 1,896,947

THROTTLE FOR LOCOMOTIVES Filed Nov. 19, 1931 2 Sheets-Sheet 2 Patented Feb. 7, 1933 UNITED STATES HARRY GLAENZER, OF PHILADELPHIA, PENNSYLVANIA THROTTLE Fort Loooivro'rrvus Application filed November 19,1931. Serial No.'576,145.

One object is to construct a throttle valve for locomotives in which a double seated valve is used to provide ample room for the passage of steam through the'valve casing. I

5 A further object of the inventlon isto provide conical valve seats for the valve.

A still further object of the invention is to make the lower portion'of the arc of the valve heavier than the upper portion, so as to counteract the tendency of the steam to force the lower face or edge of the valve from its seat, causing the valve to leak.

And a further obj ectof the inventionis t0 1 V proportion the head which'holds the valve ring or cage so that it will have a deep penetration in the valve casing, in order to provide a proper area for the flow of steam through the casing.

The valve-operatingmechanism is of the standard type and forms no part of the present invention. j In the accompanying drawings: Fig. lis a sectional elevation of the upper portion of my improved throttle valve, the

5 section being on the line 1-1, Fig. 2;

Fig. 2 is a sectional plan view on the line 2 2, Fig. 1;

Fig. 3 is an enlarged sectional view of the valve; 7

Fig. 4 is an enlarged detached sectional view of the valve seat;

Fig. 5 is a diagrammatic sectional view showing the upper flange of the valve seated on the upper valve seat; and

Fig. 6 is a diagrammatic sectional v1ew showing the lower flange of the valve seated on the lower valve seat.

Referring to the drawings, 1 is the casing of the valve, having a steam inlet passage 2 I0 at the upper end thereof and an outlet passage 3. The lower end of the valve casing is beveled at 4 so that it can be coupled to a steam pipe leading to the cylinders of the comotive. The valve casing is located in the donie of the boiler in the ordinary manner. The outlet passage 3 extends entirely around the valve chamber and is connected to the valve chamber 5 by ports 6. 7 is the seat I 1; ring or cage having an upper shoulder 8 and .50 a lower shoulder 9. These two shoulders fit fittin'gthe valves on the seat ring when'in the a corresponding shoulders on the valve casing. v The seat ring has an upper section 10 and a lower section 11, the two sections beingconnected by a series of posts 12. This constructi'on allows the steam to escape from the valve chamber and through the ports '6into' the outlet passage 3. The seat is held in place by a head 13, which extends into the valve casing from-the underside 'andis recessed-at 14tofit j the lowermember-of the valve ring, as 'clea'rly show-11in Fig. 1,-an-d has'a flange i15at its lower end, through which theretainin-g bolts 16 extend, and on these bolts are nuts 17. The lower portion of thehead has acompara- 7 tively loose -fitin an internal 'flangeon the lowerportionof-thecasing. Passages 19t in the head communicate with" the annular space 20 between the cage and thecas ing;

Thehead is made hollow as shown andv'is closed at its upper'end-andhas an extended hub 21 connected to the-outer portionof the cage by webs '22. Passing 'throughthehead is a valvestem 23, and secured to the up'per end of'this stem by a 1111524 is the valve 25. The valve has ahub 26,which 'fits the reduced end 23a of-the valve stem 23 andis. connected by a series of arms 27 to the outer rim 28,

which is substantially in the form of'an are,

providing an annular passage for steam when the valve 1s in-theopen position;

. It will be noticed inFigJB, that thelower portion ofthe arcoftherimof the valveis much heavier than the upper portion, soils to counteract the tendency ofthe steainf-to force the lower valveface or edge away irom'its seat, which would cause 'it-toleak- "*lheu per and lower edges 29 and '30 of'thevalves are conical and fit against conical seats31 and 32 of the seat ring 7, Figs. 5 and'6. The extension of the "planespa ssing through the conical valve seats meet at thecen'terline' X ofthe valve, as'shown Fby dottedlines in Fig. 3. -'This construction insures the accurate closed position. .The'valve stem '23 is con.-

nected to the operating mechanism 33, colnmon to locomotive throttle valves. {The ele vation of the valve islimited'by agpr'oj'ection 34 on the shaft 35 comingin Contact with an abutment" 36 on the valve casing, Fig. '1'.

When the valve is seated as shown in Fig. 1, the steam is entirely out ofiifrom the outlet passage 3, but when the mechanism 33 is actu ated by the engineer, the valve can be raised passage and an outlet passage communicat-,

ing with-the said chamber; aqseat ring 'mounted in the casing and surrounding the valve chamber, said ring having openings through ts walland having upper and lower seats; and a valve 1n said chamber, havlng a hub, and rimand open" at thecenter, the

rim having upper and lower edges arranged to close against the seats, the'rim beingin the form of an arc, the lower. portion of the are being of greater thickness thansaid upper portion thereof.-

b 2. .The combination in a throttlevalve, of a casinghaving a valve chamber therein; an inlet communicating with the valve chamber and an outlet also communicating with'the chamberand extending around said cham her; a seat ringym ounted'in the casing and surrounding the valvechamber, the seat ring having openings through its wall and hav ing upper and lower seats beveledin-opposite Y directions; 'andvalve located in the chamber and having an opening through its center,:the rim ofthevalve being in the form of an arc, the upperandlower edges of the rim being conical to fit thebeveled seats of the seat ring. I

3. The combination a throttle valve, of

a casinghaving a valve chamber therein;

an inlet passage communicating with the ham around vv the valve chamber and lateral'ports forming communication between the valve chamber} and the outletapassage; a seat vring. mounted ln the valve casing and surrounding the valve chamber, the-seat ring having upper and lower members and connectingposts; a valve mountedin the valve'casing and open at the'center, the rim of the valve being in the form of anarc and having upper and lower conical edges fitting corresponding edges in the; upper andlower edgeshof the seat ring, the lower, portion of the valveibeing heavierq than the upper portion thereof.

p 4. The combination in a; throttle valve having aval've chamber :therein; an inlet opening in-the upper portion of thecasing communicating with the valve chamber; an annular outlet passage surrounding the valve chamber"; ports connecting passage with f 5. The combination in casmg having a valve chamber therein; an

1 an outlet a passage extending the valve chamber; a valve seat ring mounted in the casing and surrounding the valvechamber and having openings through its wall, the valve casing having an opening under the seat ring; a head extending into'the opening bearing against the seat ring, holding it in position in the casing; means for securing the head to the casing; a valve stem extending through the head; and a valve mounted on the stem within the valve chamher, the rim of the valve having upper and lower edges, the valve being open at the center, the upper and lower edges of the valve fitting the seats of the seat ring when in the closed position; 1

a throttle valve inlet passage at the top ofthe casing and an annular outlet passage; lateral ports connecting the valve chamber with the outlet pase sage; a seat ring fittingshoulderson the val-vet casing and surrounding the valve chamber, said seat ring having upperand lower members and connecting postsyadeep head located inthe lower portion of the valve 7 casing, and bearing against theunderside of thefseat ring; means for securing the head to the casing; a valve stem extendingthrough the head; anda valve mounted on thestem and secured thereto,said valve h aving' aliub and an arc shapedrim connected by arms,

the upper. and lower seating edges-of the valve being conical, the extension'of the plane passing through the seatingedgesof the valve meeting at the center line of the.

valve, the lower portion of the are ofthe valve being heavier than the -uppje'r portionl HARRY GLAE NZER.

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