US1568466A - Injector - Google Patents

Description

Jan. 5 192.6. 1,568,466

R. M. OSTERMANN INJECTOR Filed March 5, 1925 INVENTOR Fl/DOLF 05 TERM/INA BY flgzemMss M ATTORNEYS Patented Jan. 5, 1926.

UNITED STATES PATENT FFlCEQ BUDOLF M. OSTERMANN, QF EVANSTON, ILLINOIS, ASSIGNOR TO TEE SUPERHEATEB COMPANY, OF NEW YORK, N Y., A CORPORATION F DELA'WABE.

INJECTOR.

Application filed March 5, 1925.

To all whom it may concern:

Be it known that I, RUDOLF M. Os'rnn- MANN, a citizen of the United States, and resident of Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Injectors, of which the following is a specification.

This invention relates to steam injectors and particularly to the type thereof that are operated by exhaust steam from an engine. This type of injectors is usually provided with nozzles of fixed cross sectional areas throu h which the steam and water are passe and as the amount of water required to be delivered to the boiler as Well. as the amount and quality of the steam, or in other words, the pressure and temperature of the steam available varies considerably from time to time, difiiculty is experienced in keeping the injector operating continuously, that is to say, without frequent interruptions in the continuity of the jet. Each inerruption of the continuity of the jet or breaking of the injector, as it is termed, necessitates a manipulation of the various controls at times when the duties of the engine man require his attention to the operation of the many other controlling devices provided for other parts of the engine.

The principal object of this invention is to provide automatically operated controlling means for regulating the amount of exhaust steam passing through the injecton in accordance with the temperature of the combined steam and water jet issuing from the injector. Other objects of the invention will appear more fully from the following de scription and by reference to the accompanying drawing forming a part hereof and wherein the figure 0f the drawing is a cen tral longitudinal section through an injector embodying the principles of my invention.

For the purpose of illustration, I have shown the invention combined with an ex haust steam injector of the type disclosed in United States Patent No. 1,342,128, granted to J. Metcalf et al. As shown in the draw ing the numeral indicates the main cas ing or the injector, which contains in accord ance with the disclosure of said atent, a main exhaust steam nozzle 11, an a water cone or preliminary mixing nozzle 12, into which the water from the water supply conduit 13 issues and combines with the Serial No. 13,106.

haust steam from the said main exhaust steam nozzle. The structure also includes a, cornhinmg nozzle 14, a delivery nozzle 15, and a further preliminary mixing nozzle 16 loeated between the water cone l2 and the cemhining nozzle 14. A supplementary live steam nozzle 17 is also provided in this type of injector for assisting or supplementing" the action of the exhaust steal n whenever necessary or desirable. A portion of the upper half of the combining nozzle 14 is separate from and movable with respect to the main portion of said nozzle to form a tiap 18, mounted upon an arm 19, which arm is pivotally secured as at 20 to any suitable stationary portion of the injector, Whenever the pressure or quantity of steam and water passing from the combining nozzle 14 is greater than the jet which the delivery nozzle 15 is capable of handling, the flap 18 is caused to be opened by the pressure built up Within said combining nozzle 14; and the excess fluid is ejected into an overflow chamber which surrounds the combining nozzle 14 and delivery nozzlelfi and thence through a discharge pipe (not shown). ld hen this occurs, the jet of the injector is broken and therefore the jet must be again reestablished before the injector is again operative to perform its functions,

lVith this type of injector the amount of water delivered thereto is regulated by adjusting the main exhaust steam nozzle 11, longitudinally of the injector so as to vary the annular space between such nozzle and the water cone. 1%, and in the ordinary operation of the injector said main exhaust steam nozzle 11 is set to secure a definite water delivery. When the pressure of the jet within the combining nozzle reaches an amount sufiieient to open the flap 18, such excessive pressure is usually caused by the delivery to the injector oi an amount of exhaust steam too great for the definite water delivery above mentioned, or because the temperature of the exhaust steam has increased appreciably. As these injectors are used mostly for locomotives, the above variations in the pressure quality of the exhaust steam occur frequei litis obvious that an se in the quantity of the eitincrease in the temperature e the I o, of the neeaeec from the injector to be also increased. Therefore, the conditions which cause the objectionable break of the continuity of the jet are largely, if not entirely, governed by temperature conditions within the injector. Consequently, I propose to control the delivery of exhaust steam to the injector automatically in response to variations in such temperature conditions. A satisfactory example of a construction capable of so controlling the admission of exhaust steam is illustrated in the drawings, and as shown, comprises a thermostat 21 of any approved type or construction, such thermostat being mounted closely adjacent to the delivery nozzle 15 so as to be in heat exchanging relation therewith. For the purpose of illustration, T have shown a thermostat of the so called dry type mounted within a chamber 22, provided within the main casing 10. The thermostat compri3es an expansion element or elements filled with an expanding gas or liquid, and said thermostat has secure thereto a rod 23 which passes through a cover 24 suitably secured to the chamber 22. The upper or outer end of the rod is pivotally secured to one end of a lever arm 25, pivotally supported between' its ends in a bracket 25, secured to the injector casing 10. The other end of the lever arm 25 has pivotally secured thereto the upper end of a connecting link 26, the lower end of which link is connected to a crank arm 27, fixed upon a shaft 28. The shaft 28 extends transversely through and is rotatably mounted in the auxiliary casing 29 of the injector; said auxiliary casing having its one end secured to the main casing 10, and its other end bolted to the exhaust steam conduit 30 which leads to the exhaust steam line of the engine. A butterfly valve 31 is fixed upon the shaft 28 and is adapted to throttle or regulate the amount of exhaust steam passing to the injector. The shaft 28 also has secured thereto a second crank arm 32,

to the outer end of which is connected one end of a spring 33, the other end of said spring being anchored, as at 34, to the auxiliary casing 29 and tending to hold the valve 28 in its full opened position.

The operation of the device will be readily understood. It the temperature rises beyond a predetermined amount the expansion of the thermostat will cause the lever 25 to be rotated upon its ivot in a counterclockwise direction. t ereby causing the shaft 28 and butterfly valve to be rotated in a clockwise direction against the action of the spring 33 and throttling the passage for the exhaust steam. As the temerature of the injector in the neighborhoo of the thermostat decreases, the reverse movement of the parts will occur.

It will be understood that the construction herein disclosed is merely illustrative and that many changes, variations and modifications may be resorted to without departing from the spirit of my invention.

I claim:

1. The combination with an exhaust steam injector of a thermostatically controlled valve for regulating the quantity of exhaust steam delivered to the injector in accordance with the temperature conditions prevailing adjacent to the delivery nozzle of the injector.

2. The combination with an exhaust steam injector, having a delivery nozzle, a conduit connected therewith for supplying exhaust steam to said injector and a valve controllin the said conduit, of a thermostat locate adjacent to said delivery nozzle and connected with'said valve to cause said valve to be actuated in accordance with variations in the temperature conditions within said injector adjacent to said delivery nozzle.

3; The combination with an exhaust steam injector, having a delivery nozzle, a conduit connected therewith for supplying exhaust steam to said injector and a valve controlling said conduit, means for normally holding said valve in its opened condition, a thermostat mounted within said injector adjacent to said delivery nozzle, and connections from said thermostat to said valve to cause said valve to be moved towards closed position by temperature increases within said injector adjacent to saiddelivery nozzle.

4-. The combination with an exhaust steam injector having a plurality of nozzles therein of fixed area through which a combined jet of steam and water is delivered from the injector, a conduit for supplying exhaust steam to said injector and a valve for closing said conduit, of a thermostat mounted within said injector adjacent to one of said nozzles, and a lever operated by said thermostat and connected with said valve for causin said valve to be actuated in accordance with variations in the temperature conditions prevailing in said injector.

5. In an exhaust steam injector, a plurality of nozzles through which steam and water is passed through said injector, including a delivery nozzle of fixed crosssectional area, conduits for supplying water and auxiliary steam to said in ector, a valve mounted vadjacent to the delivery end oi the exhaust steam conduit, a thermostat mounted ad acent to and delivery" nozzle,

and connections 'trom said valve to thermostat toceuse said valve to be an erated by variations in the temperature conditions within said injector.

6. In an exhaust steam inject/or, a pinrality oi nozzles through which steam and water is passed through said injector,

eluding a delivery nozzle of fixed crosssectional area, conduits for supplyin water and exhaust steam to said injector, a utterfly valve mounted adjacent to the exhaust steam conduit, a thermostat mounted adjacent to said delivery nozzle and connections from said butterfly valve to said thermostat to cause said butterfly valve to be operated by variations in the temperature conditions within said injector.

7. In an exhaust steam injector, a plurality of nozzles throu h which steam and water is passed throug said injector, including a delivery nozzle of fixed cross-- sectional area, conduits for supplyin water and exhaust steam to said injector, a utterfly valve mounted adjacent to the exhaust steam conduit, a thermostat mounted adjacent to said. delivery nozzle from said butterfly valve to said thermostat to cause said butterfly valve to be operated connections ratune conditions a sprm to norvalve m open con tion.

by variations in the tem within said in'ector, an mally hold .sai

8. In an exhaust steam injector, having as a pluralit of nozzles mounted therein, through w ich the steam and water passes in its passa through the injector, an overflow cham r, and means adapted to be automatically opened to said overflow cham- In testimony whereof I have hereunto set 40 my hand.

RUDOLF M. OSTERMANN.

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