US1649698A - Annular exhaust tip - Google Patents

Description

Nov. 15, 1927.

R C HYDE ANNULAR EXHAUST TIP Filed Oct: 11. 1926 gwomtoz ROBERT 6252225 Patented Nov. 15, 1927.

TENT OFFICE.

ROBERT C. HYDE, OF DES MOINES, IOWA.

ANNU'LliR EXHAUST TIP.

Application filed October 11, 1926. Serial No. 140,838.

The object of this invention is to provide an improvedexhaust tip for locomotive ex liaust nozzles, so constructed and arranged as to decrease the retarding infiuence on the exhaust steam as it passes to the stack, thus perfectly sealing the stack at its base and increasing the pull over the entire fire box area, permitting the opening of the nozzle tip to be enlarged, which reduces the back pressure as well as decreases the compression in the cylinder, reducing the wear on moving parts and decreasing the fuel consumption.

A further object is to provide an exhaust tip including a tapered bushing mounted in the tip to supply a perfect annular sheet of steam at the base of the stack.

lVith these and other objects in view, my invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in the claims and illustrated by the accompanying drawing, in which Figure 1 is a vertical section of my improved nozzle tip, taken on the line 11 of Figure 2.

Figure 2 is a plan view of the tip in assembled form.

Figure 3 is a perspective view of the tapered bushing removed from the tip.

Figure 4: is a vertical section showing the tip mounted in position for use in the smoke box of a locomotive.

In the construction of the device as shown the numeral 10 designates an exhaust nozzle which is mounted in the smoke box v11 of a locomotive or the like engine, immediately below the stack 12, to which it is adapted to discharge a stream of exhaust steam received through the passages 13 from the cylinders, in a common manner, for the purpose of creating a draft through the stack.

My invention relates to the tip for the exhaust nozzle 10, the body 14 of which is of substantially cylindrical form and suitably secured to the nozzle. Mounted within the tip body 1% is a tubular bushing 15, open at both ends, of less diameter and length than said tip body and supported in the upper end thereof so that their upper ends are substantially flush. The lower por tion of the wall of the tip body 10 is flared or tapered so as to produce a bore of substantially truncated conical form, as indicated at 16, and the lower end of the bush-v ing 15 also is tapered or beveled away from the wall of the tip body, thus increasing the upward taper of the annular passage formed between the lower walls of the said members. The upper portion of this annular passage may be substantially cylindrical. The bushing 15 is formed with a plurality of spaced wings, in this instance four in number and designated by the numerals 17, which wings are integrally formed on its outer surface, extend down approximately half way of the length of the bushing, and bridge the space between it and the wall of the tip tapered at their lower ends to decrease resistance on the passing steam, and are formed at their upper ends with notches 18 arranged radially f the bushing and extending through the upper wall thereof. The outer edges of the wings 17 are designed to have a tight fit within the wall of the tip 14: to hold the bushing in place, but I have also shown other means for holding the bushing in place, comprising lugs 19 fitted tightly within the grooves 18 and extended to overlapping relation with the upper margin of thetip 14, to which they are secured by screws 20.

It will be noted that by mounting the tapered bushing in the nozzle tip, there is very little obstruction which would result in retardation of the exhaust steam, and also that an annular sheet of steam is projected from the tip to the base of the stack 12, forming a perfect seal at the base of the stack and increasing the pull over the entire fire box area. This arrangement permits the opening of the tip to be onlarged materially, thus reducing the back pressure as well as decreasing the compression in the cylinders, and tending to reduce wear on the moving parts therein because of the increased area of the tip. The tapering of the bushing and the wall of the tip body at 16, thus producing an annular passage of substantially conical section, results in a lessening of the retarding effect on the exhaust steam. This arrangement has resulted in a material saving of fuel consumption ranging from about ten to sixteen per cent.

The form of nozzle and tip may of course be varied from that here shown and described for purposes of illustrating my improvement, and it will be understood that my invention is adapted for use with other 14. The wings 17 preferably are lflO ill)

types of nozzle tips without departing from the spirit of my invention.

I claim as my invention- 1. An exhaust nozzle tip comprisin a substantially cylindrical body and a tu ular bushing open at both ends and of less diameter than said body and mounted therein, whereby an annular passage is provided between saidbody and bushing, said bushing being' tapered uniformly from its upper to its lower end. v y

2. An exhaust nozzle tip comprising a substantially cylindrical body and a tubular bushing open at both ends and of less length and diameter than said body and arranged in the upper end thereof, said bushing being formed with relatively narrow wings 011 its outer face extending; into engagement with the inner wall of the body, and lugs carried by said wings and overlying the upper margin of the body.

3. An exhaust nozzle tip comprising a substantially cylindrical body, a tubular bush ing open at both ends mounted concentricab ly Within said body, and means for securing said bushing rigidly in place; the wall of said bushing being tapered in thickness toward its lower end and the inner wall of the body sloping away from such tapered portiont onner c. HYDE.

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