US1310681A - Turbine nozzle-jung - Google Patents

Description

E. H. SHERBONDY.

TURBINE NOZZLE RING APPucATloN FILED MAY14.1'918.

A"Patented luly 22, 1919.

WITNESS EARL H. SHEBBONDY, 0F CLEVELAND, OHIO.

TUBBINE NOZZLE-RING.

Specification of Letters Patent.

Patented July 22, 1919.

Application led May 14, 1918. `Seria1No. 234,553.

To all 'whom t may concern:

Be it known that I, EARL H. SHERisoNDY, a citizen of the United States, residlng at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certaln new and useful Improvements in Turbine Nozzle- Rings, of which the following 1s a specification.

This invention relates to a turbine nozzle ring,- more particularly to one that 1s to be used in connection `W1th a turbine that 1s operated by the waste gases from an mternal combustion engine.

It is an object of the inventlon to produce a nozzle ring which is susceptlble of fairly 4rapid production, and Which'wil'l withstand ythe high temperatures met with 1n a gasoperated turbine. l

A It is a further object of the invention'to provide a nozzle ring which may be readily mounted onto the inlet chamber for the gases that operate the turbine.

It is another object of the invention to provide a nozzle ring with a serles of peripheral inlet openings and a corresponding series ofside outlet openings.

It is another object of the invention to provide a double discharge nozzle ring, that is to say, one'which will discharge gas on both sides to operate two turbine wheels, and which is `accordingly ositioned between the turbine wheels. T is double discharge ring is also provided with peripheral inlet openings, one set of perlpheral openings taking in gas for discharge to one turbine wheel,'and the other alternate peripheral openings taking in gas for discharge onto the other wheel.

Other objects and advantages will appear as the description proceeds.

Referring to the drawings whlch are more or less diagrammatic, Figure 1 isa top' view of the single discharge nozzle ring; Fig. 2 is a side view of the same; Fig. 3 is a section on the line 3-3 of Fig. 2; Figs. 4 and 5 are sectional views, respectively, on the lines 4-4 and 5-5 of Fig. 2; Fig. 6 is ay top view of the double discharge nozzle ring; Fig. 7 is a view of the single discharge nozzle rlng in position in relation to the turbine; and Fig. 8 is a view of the double discharge ring positioned in relation to the turbine.

The nozzle ring 1 is made from a. solid annular blank of material which will withl stand the high temperatures met with in a gas operated turbine. This annular blank is rectangular in cross section. The series of nozzles withperipheral inlets and side outlets may be cut in this ring in a number of different ways, and may be of a number of different shapes, and may evidently be madeby a number of different methods. The gist of the invention is in having perihperal inlets for the gas and side outlets. As shown in Fig. 1, the nozzle ring 1 has cut into the inlet opening. ABCD, here shown as rectangular. This opening, however, could be of any desired shape, for instance-elliptical. The discharge opening for the inlet opening ABCD is shown in Fig. 2 at CB"AD. The nozzle passage itself, indicated at N, is four-sided, being defined by the four walls that intersect on the lines AA',- BB', CC', DD.

It will be noted that the nozzle passage N is cut through the ring 1 in such a direction.

as to deliver the gas in the same direction as the direction of rotation of the turbine wheel, as indicated by the arrow in Fig. 1.

The nozzle passage N is preferably cut in such la way that its cross sectional area decreases toward theoutlet, this decrease in the nozzle area serving to impart additional velocity to the outgoing gas.

In one method of manufacture, and in order to facilitate the cutting-of the nozzle passage N, the nozzle blank may be profiled all the Way around on the curved line 2-3, Fig. 5. The line'2, 2, Fig. 1, representing the inner ,edge of the profiled portion. goes back far enough from the edge of the blank 1 to be coincident with the line DC, representing the adjacent edge of the inlet opening ABCD. AThe line 3, 3, representing the other edge of the profiled portion, is at such a distance from the upper edge of the original blank as to be. coincident with the line DA, Fig. 2. The removal of the section of metal 2, 3, 4, is to vfacilitate the machining operations in cutting the passage N. After the passage N has been cut, a profile ring 5 is Vsuitably fastened in position in this cut away portion. This profile ring 5 has a series of apertures 5 cut into, which apertures 5 register with the several discharge openings C'BAB.

Referring now to Fig. 6, a substantial duplication of the arrangement in Fig. l is shown. The body 6 of the nozzle ring is made from a blank somewhat thicker than the blank 1, in view of the fact that a double 'Ill ` vments 17 and 18 are of charge gas to the other side of the wheel.

7 and 7 indicate the peripheral inlet p assages fortwo of the nozzles of one series,

' v and 8 indicates the inlet opening of one of of nozzles that delivers gas on the of the turbine ring. The as taken the nozzles 7 and 7 is elivered outlet openings 9 and 10, respectively, on one side, while the gas taken in through the opening 8 is discharged through the outlet openings 11 on the other side pnto the other wheel. Other nozzles with inlet the series other side in through through the and outlet openings similar to 7 and 9, re-

spectively, are positioned all the way around the nozzle ring 6, and other` nozzles with inlet and outlet openings similar to 8 and 11, respectively, are positioned all the way around the nozzle ring, the second series being alternately placed with respect to the iirst series. In the course of manufacture, the blank 6 is profiled on both sides, as was done in the case of the single discharge ring, and the profiled portions filled with profile rings l2 and 1'3, respectively, these t'wo profile rings being provided wlth the necessary apertures lregistering with the openings 9, 10, etc. on one side, and the series of opens i s l1 on the other side, respectively.

eferring now to Fig. 7, the nozzle ring l is positioned adjacent a turbine wheel 14,v provided with the usual buckets 15, the turbine turning wth a shaft 16. The nozzle ring` 1 is supported by annular casingelements 17 and 18, forming an exhaust inletJ chamber 19. The outer edges of the nozzle ring are supported between the two elements 17 and 18, so that the periphery of the nozzle ring faces into the' chamber 19. The elea volute form, so as to give a volutevchamber to uniformly distribute the incoming gas around lthe peare clutched together to turn on a shaft 25.-

e double discharge nozzle ring 6 is csi-- tioned between these two wheels 23 an 24, and has associated 17 and 18', which define a volute chamber 19 for the exhaust gases. The inlet openings 7, 7', etc., and 8, etc., open into thechamber 19, discharge openings,9 andlO discharging gas onto one of the wheels 23 and 24, while the other series of discharge openings l1 discharge onto the other wheel. The gas leaving the turbine buckets 23 and 24 'passes 4 into annular exhaust chambers 26 and 27, respectively, 26 and 27, respectively.

It will be noted that the nozzle passages are gradually and arcuated curved, presenting no sharp corners or tures minimizing steam friction and so aidin the How of steam to the turbine buckets.

Vhile I have illustrated possible embodiments of my invention, it should be understood, as pointed out in the rst part of the specification, that the invention consists in makingl a nozzle ring with peripheral inlet openings and side outlet openings, and that this inventive idea may be carried out in a number of different ways.

I claim- Arturbine nozzle ring for an axial flow turbine,.provided with a nozzle having a peripheral inlet and a side outlet, the nozzle passage presenting a gradual, arcuate curvature from inlet to outlet, said nozzle ring further being profiled on -one side, and a pro- :file ring seated on said profiled portion.

In testimony whereof I aihx my signature.

,EARL H. SHERBON DY.

and escapes therefrom through therewith casing elements a'brupt turns, fea'- l

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