US1583363A - Injector - Google Patents

Description

May 4 1926.

. R. M. OSTERMANN Imam-on NN ww r NN m H [lilium ATTORNEYS May v4 1926.

l R. M. OSTERMANN INJECTDR Original Filed Feb. 18, 1924 3 Sheets-Sheet 3 Patented May 1926.

UNITED srAr nUDoLrM. osTnRMANN, or EvANsToN, ILLINOIS, AssIGNo'R To THE surnminiMinnA ooMrANY, or NEW Yoan, N Y.,

assises PATENT. orifice.

A CORPQBATION 0F DELAW'ARE.

Original application filed February 18, 1924,v Serial No. 693,451. Dvidedvand thisr application l'ed. t NovemberlS, 1924, Serial No. 750,546. Renewed October 19, 192`5.

To all whom it may concern.' v Be 1t known that I RUDOLF- M. OSTER- MANN, a citizen of the United States, and a resident of Evanston, Cook County, State;

to reduce the amount of Water admitted to.

the injector whenever the pressure ofthe exhaust steam falls below a value sufficient to insure the continuity of .the water jet delivered thereby; this reduction of thewater is usually accomplished by means of amanually operated handle which controls a movable cone within the injector. In addition to the manual regulation of the water these injectors are also provided with a supplementary live'steamnozzle' to assist the steam actionof the low pressuresteam nozzle, and' while the admission of a supplementary supplyl of live steam is effective-to as sist the exhaust steam action, it necessarily in volves the .manipulation of additional controlling means, and is subject to the further objectionthatv it increases both the maximum and minimum water delivery of the injector and therefore does not have any marked influence upon the working range of theinjector. v f ,i

It is an object of the present invention to provide an injector of this type a newv and improved construction byk means of which V the flow of the low pressureexhaust steam tif water delivery to Aloe substantially iny through the injector is automatically con.

trolled by an element whose movement or lposition would be substantially indicative of the pressure of the exhaust steam flowing to the injector. Y v

`A further object is to, provide an, exhaust steam injector 'which will permit the range l'eil; l: i l y i VYAnother object is to provide adjusting Lnieans, interconnect-ed in sucli a manner vith.

the means for automatically controllin, the flow ofthe exhaust steam, that the amount lowing detailed description and the accom-v panying drawings forming a part hereof,

vwherein are illustrated typical examples of installations constructed in accordance Vwith the principles of my invention.

Fig. 1 is a central longitudinal'horizontal sectionjon the line 1-1 of Fig. 2 through an injector embodying my 'invention. v,

Fig. 2 is a side elevationl of a portion of the injector shown in Fig. 1. Y

Fig. 8 is a section on the line 8-3 of rig. 1.

Fig. 4 is a diagrammatic illustration of an installation of the injectorv tov a locomotive. y

Figs, 5 and 6 are a sectionaldetails of parts ofthe installation 'shown in Fig. 4.

Fig. 7 an illustration of a modified form of an installation.

v-Referring to.` Figs. 1 to 3 of the drawings the numeral lOindicates the main casing of the injector whichcont-ains therein av main exhaust steam nozzle 11, a Water cone or preliminary mixing nozzle, 12, a combining nozzle 13, a delivery nozzle '14, and a further preliminary mixing nozzle' 15 betweenv the water cone and combining nozzle, all as more particularly sety fort'hin the aforemem tioned patent to Metcalfe, et al.y

,The main exhaust steam nozzle 11 is movable longitudinally of casing 10 to vary the "annular waterY inlet formed between the outer surface of the lnozzle 11 and Jglie inner end of the watery cone 12, and to control the kamount of waterdrawn through the intake of water delivered. to 4the' injector may ybe opening 11a, as in theV structure disclosed f in said patent, but instead of the manually operated handle employed Ain such structure to move said nozzle 11, I provide an internally screwsthreaded bushing 16, rotatably mounted withinthe casing 10 and having a plurality of gear teeth 17 upon its outer circumference. The main exhaust steam nozzle is screw-threaded, as atli, to lengage within the bushing is. suitable packing as ndicated at 21.9 is insertedbetween'tle bushing 16 and casing 10, and the bushing is restricted from movement longitudinally of the casing by any suitable means.

A rack 2O for rotating bushing 16 is slidably mounted in a. boss 21 of casing 10 and meshes with the gear teeth 17 of bushing 16, said rack being shown as a grooved rod which projects through a stuffing box 22 on said boss, and is. pivotally connected, as at 23, to one end of a lever l24. ln order to prevent rotation of the main exhaust nozzle 1l, the nozzle is provided with a laterally pro- 'jecting. boss 2 5 which is suitably apertu'red to receive a pm or stud 26 fixed within the end wall of the water cone 12.

Rotatably mounted within a flanged col lar-like extension 27, secured, as by b olts 26, to the flanged end 29 of casing 10 is an internally screw-threaded bushing 30, having gear teeth 31 on its outer circumference with which a rack 32 engages. Rack 32 is slidably mounted within a boss 33 on the ext-ension 27 and its projecting outer-end is pivotally connected at 32, to the other end of lever 24, the construction of bushing BO, rack 82 and boss 86 being similar to? the bushing 16, rack 2O and boss 21, except that the screw-tln'eads of the bushings 30 and 16 are opposite in direction.

A spider '34'terminates at its inner'end in a cone-shaped surface 35, to provide a valve member which is spaced from the larger end ofthe inner wall of the main exhaust nozzle 11 to form an annular space through which the exhaust steam passes to the said nozzle, while the other end of the spider is formed into an annular, externally screw-threaded collar 34ZL to engage with the threads of bushing 8O for the purpose of moving the live steam passes, and a counter bore spider 64 longitudinally of the injector' to vary the size of said annular space.

The spider 34 forms a part of thc live steam nozzle and is provided with a boss 66 having a central bore 67, through which the P which is slidably mounted over the live steam admission pipe A39, pipe 39 extending through the manifold 40 and being connected with the live steam `conduit 41. A key or pin 43 is lined to pipe 39 and engages in a suitable key-wa f or slot 44 within the boss 36 of spider 34 to prevent rotation thereof while permitting. longitudinal movement of the spider.

The inner flange of the flanged collar-like extension 27 is provided with an apertured boss 46 to rwhich the by-pass 47 is connected, said by-pass leading a portion of the steam to the space between the water cone 12 and the further preliminary mixing nozzle 15 to provide an outer envelope of steam about the combined jet issuing from the nozzle 15 between the Water cone and combining nozzle.

The opening to the boss 46 from the injector is located between the bushings 18 and 36 and a small valve 46 which is suitably seA cured to the spider 34 is adapted, when theJ spider 34 is moved towards the main eX- aust steam nozzle, to move across and close the opening of the boss 46 to an extent substan-v tially proportional to the throttling or" the annular space between the nozzle 11 and water cone 12.

Means are provided for varying the positions of the spider 34 and cone 11 to regulate the range of water delivery of the injector, and such means may comprise a manually adjustable rod 57 having its inner end connected with the pivotal connection 28 of the lever 24, while its outer end is extended to any conveniently accessible point and is screw-threaded to receive the hand wheel 58. Figs. 4 to 6 illustrate an installation in which the movement of the spider 34 .is effected by an apparatus connected with an element of a locomotive engine, the movement of which element is indicative of variations in the pressure of the steam exhaust line. The numeral 60 indicates the valve rod of a locomotive to which is secured a eollar 61. L lever 62 pivotally mounted inter-y mediate its ends, has one end thereof pivotally connected to the collar 61, while its other end is pivotally secured toa piston rod 63 of a piston 64 slidably mounted within a cylinder 65 formed on the lower part of a fluid container 66.

Communication between the fluid container 66 and the cylinder is furnished through a suction valve 67. A conduit 66 leads from the end of cylinder 65 to a valve casing 69 in which a pressure valve 76 is located at the delivery end of the conduit 68. One end of avpipe line 71 is secured to the valve casing 68, and its other end leads to the lower part of a fluid pressure cylinder 2 mounted adjacent to the injector 10, the construction of the injector being identical with that shown in Fig. 1. An aperture 73 whichis conA` trolled by a needle valve 74 permits a por--A tion of the fluid delivered by the pump 65 to be by-passed into the vfluid container 66. The fluid pressure cylinder 72 has slidably mounted therein a plunger 75 which is connected by the plunger rod 76 with the lever 24, which lever is connectedA to the racks 2.6 and 32 of the injector, an adjusting rod and handle 58 being` provided all as show-u in Figs. 1 to 3 inclusive. A coiled spring 77 is confined between the head of cylinder 72 and the plunger 75 and serves to urge'the plunger against the pressure of rthe fluid from the pipe line 71.

The operation of the installation shown in Figs. 1 to 6 inclusive is as follows: rlhe reciprocation of valve rod 60 causes the piston 64 to be reciprocated, thus withdrawing the fluid from the fluid container 66 and forcing it through conduit 68 into the pipe line 71. Needle valve 74 may be adjusted to cause a llO f portionof the Huid delivered by the pump to l be ley-passed through the aperture 73 from the valve casing 69 yintovtheliuid container 66, it being understood that the size of the aperturel 73 is only suicient to permit a.,

. speed of the engine, and as these tivo factors are fairly indicative of the exhaust steam pressure, the pressure of the fluid Within the pipe line 7l and cylinder 72 therefore changes in accordance with variations of the pressure of the exhaust steam.

As the cut-off of the main valve of the engine is regulated by the reverse lever of the locomotive, Fig. 7 shows another form of an installation in which the position of the lever 24 is controlled by the position of the reverse lever 80. For this purpose the center of lever 24 isconnected by a link 81, to one arm S2 of a bell crank, the other arm 83 of Whch lies Within the path of a lug 84 which projects outivardly from the side of the reverse lever 80. A spring 86 normally holds the arm 82 of the bell crank lever in engagement with a stop 87,- as shown in Fig. 7. When the lever 8O is thrown to the normal forward Working position, the lug 84 will engage ythe arm 83 of the bell crank and move the lever 24 toY positions corresponding to the position of the reverse lever, thereby making the positions of the racks 2O and consequently the spider 34 dependent upon the positions of the reverse lever. Y

During the automatic.operation of the device by the cylinder and piston, the pivotal connection 23 will act as a fulcrum for the lever 24 thus causing rack 32 to 'be moved, the rack 2O meanwhile being held stationary by the rod 57; on the other hand When the hand Wheel 5S is operated the lever 24 will pivot upon its pivotal connection With the rod 7 6; with this arrangement the racks 20 and 32 Will be shifted in opposite directions so that longitudinal movement of the rod 57 in one direction Will simultaneously cause the annular inlets for the Water and steam to be restricted, and inthe reverse diy rection Will cause the annular inlets to be increased. It will benoted that the threads of the bushings 18 and-303 are arranged to produce this movement of the nozzle l1 and the threads ofthe vbushing 30 is greater than the threads of bushing 18, so that When thenoZZle 1l is moved a certain distance by the hand Wheel'58 and rod 57 the'spider 34 will be moved a proportionately larger distance but in the same direction, this being necessary because of a variation of the quantity of Water requires a greater variation in the quantity of steam supplied.

It will be understood that the disclosure contained herein is to be considered as illustrative and not in a limited sense and that changes, variations, and modifications mayL which is indicative of the exhaust steam conditions, to automatically actuate said valve member in accordance With variations in said exhaust steam conditions.lr j i 2. In an injector adapted to be operated by the exhaust-steam from Van engine, a Water controlling device, to regulate the amount of Water delivered to the injector, a valve member for controlling the flow of exhaust steam through said injector, operating mechanism for saidvalve member, and mecha- GQ .l spider 34 respectively, and that the. pitch of nism operated by the valve travel of the enl gine for actuating said op-erating means.

3. In an injector adapted to be operated by the exhaust steam from an engine, a Water controlling device, to regulate the amount of Water delivered to the injector, a valve member for controlling the flow ofexhaust steam through said injector, operating mechanism for said valve` member and means comprising a iiuid pressure system operated by the valve travel of the engine, foractu ating said operatingmechanism.

In testimony whereof I have hereunto set my hand. Y

RUDOLF M. OSIERMANN.`

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