US1452147A - Packing for steam turbines - Google Patents

Description

Apr. 17, 1923.

1,452,114? c. w. DAKE PACKING FOR STEAM TURBINES Original Filed June 21, 1918 .252 venfor' Ckarzep 772657236 Apr. 117, are.

attain earner @FFHQIE.

CHARLES W. DAKE, OF CHICAGO, ILLINOIS ASSIGNOR TO THE PYLE-NATIONAL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

PACKING FOR STEAM TUBBINES.

@riginal application filed June 21, 1918, Serial No. 453,991.

Renewed March 21, 1921. Patent Nb.

1,377,755, dated May 10, 1921. Divided and this application filed March 10, 1919. Serial No. 281,890.

T 0 mil whom it may concern:

Be it known that 1, CHARLES W. DAKE, a .citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Packings for Steam Turbines, of which the following is a specification.

My invention relates to improvements in packings for steam turbines and the like. as shown in Patent No. 1,377,755 of which the present application is a division. It has for one object to provide a new and improved form of packing, means for adjusting it and holding it in position whereby the leakage from the pressure chamber about the turbine shaft may be reduced to a minimum.

Other objects of my invention will appear from time to time in the specification.

- My invention is illustrated more or less diagrammatically in the accompanying drawings wherein- Figure 1 is a longitudinal section of a part of the turbine;

Figure 2 is a section along the line 22 of Figure 1;

Figure 3 is a detail section along the line 33 of Figure 1;

A is a turbine housing. Steam is adapted to be fed into it through a steam pipe A and valve housin A to drive the bucket wheel A. This ousing A is preferably continuous on one side as shown and is closed on the other side by a removable diaphragm A held in osition by bolts A. A is the turbine shaft upon. which the rotor or wheel A is mounted and with which it rotates.

This shaft is supported at the motor end of the machine by bearings not here illustrated. The diaphragm A is centrally apertured as indicated and this aperture is closed by a removable collar A held in position by screws as indicated. This removable collar is interiorly screw-threaded as at A and flanged as at A. The hub A of the Wheel projects outwardly through the collar just clearing the flange A". A is a packing contained within the collar A resting against the flange A adapted to be compressed by the screw-threaded land A, so as to make a steam tight joint getween the ring A and tlje hub. This gland is screw-threaded in,

the collar A and is serrated as indicated and engaged by holding spring A which holds it against rotation though, of course, the spring may be drawn out and rings applied for the necessary usual adjustment. The end of 'the shaft A. extends out beyond the diaphragm A and is slidably mounted within a'sleeve B. This sleeve is held against rotation on the shaft by a spring key B rojecting in through a perforation in the sleeve to engage a curved key seat B The arrangement is such that when the parts are in the position shown in Figure 1, the spring key snaps into the key seat and holds the seat in rotation with respect to the shaft. If you pull the sleeve longitudinally along the shaft, however, the inclined surface of the key seat will cause thespring keyas it engages it to ride up until the key has left the key seat and thus the sleev may be easily withdrawn. The sleeve B is shouldered as at B and the inner race B of the ball bearing is clamped against the shoulder by the nut 13 on the sleeve B. B is a bearing cap supported by arms B on the diaphragm A. This bearing cap is bored out to engage the outer ball race B of the shaft supporting ball bearings and is shouldered as at B to engage such outer ball race.

The sleeve B is flanged as at C and this flange engages a felt packing C in the wall of the bearing cap. A removable cover C on the outer end of the bearing cap closes it, being held in position by bolts (1*. This cover has two segmental conical partition walls C C adapted to engage upper and lower sides of the ball race B and clamp that ball race in position in the bearing cap.

'The reason why the members C C are segmental is to leave room for an'oil ring C which rides on the outer end of the sleeve B and carries oil up from the oil well C in the bearing cap. This oil runs down the inclined surface C to oil the ball bearing and a certain amount of oil, of course, works its way in between the sleeve and shaft to oil those parts so that sliding movement may take place when desired. The oil pocket C is bounded on its outer side by the wall or dam C so that when the cover C is taken 0d the oil does not run out of the pocket and the hearing may be adjusted and parts removed or changed without losing oil.

- Clearances are such that the oil ring might ratus, the cap C can be drawn out and the bearing may be inspected or drawn off if need be or if the whole assembly is to be taken down you release the gland A", unscrew the screws A and the whole diaphragm and bearing cap could be taken off thus exposing the whole inside of the turbine without in any way changing the adjustment of the ball bearing. Of course, the important thin is to make it possible to take down the machine without changing the adjustment of the ball bearing or without making it necessary to have expensive and expert help do the work.

It will be evident that while I have shown in my drawings anv operative device, still many changes might be made both in size, shape and arran ement of parts without departing. materia ly from the spirit of my inventlon, and I wish, therefore, that my drawings be regarded as in a sense diagrammatic. Y

I claim v .1. The combination with a cylindrical member of an apertured plate through which it projects, a sleeve interiorly threaded located within said aperture outwardly flanged to engage the plate, inwardly flanged to surround the c lindrical member, a gland being in screw-t readed engagement with the sleeve and a packing surrounding the member and adapted to be compressed by the gland against the member between it and the inner flange, the sleeve being apertured, a spring ring having an inwardly radially extending finger passing through said aperture, the gland being serrated to be engaged b said spring finger whereby-it may belocked against rotation, a ball bearing, means for holding it in osition, a sleeve in fixed rela tion with suc bearing, a shaft mounted in the sleeve and a s ring held key carried by the sleeve adapte to penetrate it and engage and hold the shaft against rotation with respect to the sleeve without interfering with the longitudinal moyement of the shaft with respect to the sleeve, a key seat in the shaft having radially extending walls to engage the key andcause the shaft and sleeve to rotate 1n unison and curved-end walls adapted to guide and gradually force the ke out of engagement with the keyed seat w ien the shaft is moved longitudinally with respect to the sleeve.

2. In a steamturbine, a housing, ajcover therefor, a shaft, a wheel, a hub therefor mounted upon the shaft, the hub projecting outwardly through; the cover, a packing bushing in the cover surrounding and in engagement with the hub, a packin gland engaging said packin bushing an locking means adapte to hold the gland in position in engagement with thebushing.

3. A bearing ring threaded a out a part of its exterior and of reduced exterior diameter about the unthreaded portion of its exterior a plurality of slots across one of its ends and a plurality of exterior grooves in register with said slotsand extending throughout a part of theexterior length of the r'mg the surspring .70 acking gland comprising a v face of the other end of said ring inwardly inclined. 4. A. hearing coverstufling box comprising a cylinder threaded throu bout a portion of its interior, channeled a ut one end of its outer circumference and carrying at,

one end a radial flange extending outwardly and inwardly from its interior and exterior surfaces.

5. A bearing cover stuffing box, comprising a cylinder threaded throughoutaportion of its interior, channeled about one end of its outer circumference, one or more perforations inside-said channel, a, radial flange on one end of the cylinder extending outwardly and inwardly from its interior and-exterior surface, the inner portion of said flange increasing in thickness toward the inner surface of the cylinder.

In testimony whereof, I aflix my signature in the presence of two witnesses this twentieth day ofFebruary, 1919.

CHARLES W. DAKE.

Witnesses:

MARION L. INGRAHAM, Em'rn L. Pon'rna.

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