US1575249A - Apparatus for removing condensate from revolving driers - Google Patents

Description

March 2 1926. 1,575,249 E. E. BERRY ET AL 1 APPARATUS FOR asmovme CONDENSATE FROM REVOLVING mums Filed Dec. 15, 1925 2 Sheets-Sheet 1 2221373 en y March 2 1926. 1,575,249

E. E. BERRY ET AL APPARATUS FOR REMOVING CONDENSATE FROM REVOLVING DRIERS Filed Dec. 15, 1923 2 Sheets-Sheet 2 jig 1 51 l EVW gclg Patented Mar. 2, 1926.

, UNITED STATES PATENT OFFICE.

EABL ELWIN BERRY All!) HAMILTON ZN. BOSS, OF BELOIT, WISCONSIN, ASSIGNORS TO BELOIT IRON WQRKS, F QELQIT, WISCONSIN.

APPARATUS FOR REMOVING CONDEN$ATE FROM REVOLVING DRIERS.

Application filed December 15, 1923. Serial No. 680,821. 1

To all whom it may concern:

Be it known that we, EARL E. BERRY and HAMILTON N. Ross,'citizens of the United States, and residents of the city of Beloit,

a in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in an Apparatus for Remow ing Condensate from Revolving Driers; and we hereby declare that the following is a it full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

In paper making machines the web after passing through the wet end of the machine during which time a part of the water is removed from the web, is conducted over a series of heated cylindrical driers which act to to evaporate most of the remaining moisture from the web to produce paper. The cylinders' are usually heated by steam which enters through the cylinder journals and heats the cylinders, the drying of the web causing the steam in the cylinders to condense. In drying machines of the type now extensively in use the condensed steam or water from each cylinder is removed by dippers or by means of a radially directed pipe which is bent to lead out through one of the cylinder journals. The method of removing the condensate from the cylinder out through a siphon ipe has not proven'very satisfactory at liigh speeds since the water of condensation in the revolving drying cylinder, which usually ponds in the lower portion of the cylinder, is distributed by centrifugal force in a film around the inner peripheral wall of the cylinder and therefore makes it impossible to rapidly draw off the condensate. The condensate when not removed rapidly enough accumulates to such an extent at highspeeds that the film of the pondensate soon becomes thick enough to seriously impair the proper radiation of heat from the steam to the walls of the cylinders thereby interfering with the proper drying of the web.

This invention relates more particularly to an improved type of a paper machine drying cylinder so constructed that at high speeds the condensate is distributed in a thin film around the inner surface of the cylinder and is discharged rapidly enough through suitably arranged outlet grooves and passages in the end of the cylinder through whlch grooves and passages the condensate is forced by the pressure of the steam in the a plurality of passages provided in the ends of the cylinder and communicating with peripheral grooves in the end portions of the inner surface of the cylinder to receive the condensate when the same is distributed in a film against the inner surface of the cylinder when the same rotates at high speeds, thereby maintaining the distributed film as thin as possible thus causing no material obstruction to the roper radiation of heat from the steam to t ecylinder walls.

It is also an object of the invention to provide a method of rapidly discharging the condensate of a steam heated paper drying cylinder out through passages communicating with grooves in the inner peripheral surface of the cylinder.

It is an important object of the invention to provide a paper drying machine drying cylinder of simple and improved construction adapted to discharge a condensate out through outlets connected with the inner peripheral grooves of the cylinder to maintain the interior of the cylinder substantially free from accumulations of the condensate so that at high speeds the thickness of the film of condensate is maintained at a minimum so as not to interfere with the proper radiation of heat.

Other and further important objects of this invention will be apparent from the disclosures in the specification and accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings;

Figure 1 is a fragmentary longitudinal section through one end of a paper drying machine, drying cylinder embodying the principles of this invention.

Figure 2 is a transverse section taken on line 2-2 of Figure 1.

Figure 3 is a fragmentary-detail section taken on line 3-3 of Figure 2.

taken on line 77 of Figure 1.

Figure 8 is a fragmentary longitudinal section through a modified form of cylinder.

"As shown on the drawings:

The reference numeral 1 indicates a paper making machine drying cylinder one end of which is closed by an end plate provided with a suitable journal for mounting the l cylinder. The inner peripheral surface near the other end of the cylinder is provided with a peripheral groove 2 having the inner ends of a plurality of condensate outlet passages 3 communicating therewith. The outlet passages 3 incline outwardly toward the axis'of the cylinder and are formed in a flange 4 integral with the end. of the.

cylinder.

The cylinder is closed by means of an end closure plate 5 rigidly secured to the cylinder flange 4: by screw bolts 6. Integrally formed centrally on the closure plate 5 is a journal sleeve 7 having a journal ring .8 secured on the end thereof. The journal ring 8 is formed with an inwardly rounded end surface '9. The end plate 5 is cut away around the outer edge of the inner surface thereof to aiford a boss 10 which projects into the ring flange 4 of the cylinder. A cirrular groove 11 is provided in the cut out portion of the end plate and has communieating therewith a plurality of radial passa es 12 which open into the passage 22.

ltigidly secured by screw bolts or other means against the central portion of the end I plate 5 is a flanged bearing ring 13 through which a stationary steam inlet pipe 14 projects into the cylinder. "The pipe '14 pro ects through the journal sleeve 7 and has a bear- .ing nipple or collar 35 secured on the end thereof and groundto afford a bearing surface which lies in the curved plane of the rounded surface 9. A. bearing elbow 15 is provided at the outside of the bearing ring 8 1 and'has a steam inlet passagelfi to which a T steam supply pipe. 17 is connected. Integrally formed on the .elbow 15 is a bearing unge '18 having a round bearing surface against which the rounded surface 9 of the journal ring Sand the rounded bearing surface of the collar 35 engage. Also formed in the elbow ,15 is a condensate outlet passage 19 which registers with a condensate outlet opening 20 provided in the journal ring 8 Y igure 1).

A discharge pipe 2-1 is con- ,nected with the elbow 15 and communicates with the condensate outlet passage 19. The

rounded bearing flange 18 is adapted to be nevaaae held against the rounded bearing surfaces of the members 8 and 35 by means of an adjustable nut 23 engaged on a screw 2% supported on a collar 25 mounted on a sta tionary pipe or post 26. The post 26 is located adjacent the end of the elbow 15.

Figure 8 illustrates a modified form of a paper drying cylinder 27 the walls of which are thickest at the middle of the cylinder at the point 28 and gradually taper toward both ends terminating against end flanges 29 each having a plurality of outlet passages 30 therein.

Each end of the cylinder 27 is closed by an end plate 31 which is cut away at the outer margin of the inner face at 32 and is provided with a ring groove 33 with which the passages 30 communicate. Each end plate 31 is also provided with a plurality of radial condensate outlet passages 34 the inner erids of which connect up with the condcnsate outlet passage in the journal sleeve of the cylinder similar to the arrangement illustrated in Figure 1.

The operation is as follows:

Steam from the supply pipe 17 enters the paper drying cylinder 1 through the passage 16 of. the elbow 15 and through the steam inlet pipe 14. The cylinder is heated by the steam and acts to dry a paper web which passes over the outer peripheral surface of the cylinderwhen the cylinder is rotated. During the drying process of the paper web the steam within the cylinder condenses and it is therefore necessary that the condensate be removed from the cylinder as rapidly and as completely as possible to permit inders. v The condensate in the cylinder. at high speeds is distributed in a film around the inner surfaceof the cylinder and tends to seek its lowest level and consequently flows into the inner peripheral groove 2 from-where it together with any entrapped steam is forced by steam pressure within the cylinder out through the outlet passages 3 into the ring groove 11 and then through the radial passages 12 into the outlet passage 22 of the journal sleeve-7. From the passage 22 the difierential pressure in the discharge pipe 21 continues to discharge the condensate and steam through the journal ring opening 20 and the elbow passage 19 into the pipe 21 from which the condensate and steam is discharged or returned into the system.

The condensate from the cylinder 1 is thus rapidly conducted out of the cylinder thereby obviating any tendency of the condensate remaining in the cylinder long enough to permit a film of any considerable thickness to form on the inner peripheral walls of the cylinder sufficient to interfere with the proper radiation of heat.

In the modified form" of cylinder 27 illusroper radiation of heat from the steam to t e cyltrated in Figure 8 the condensate runs outwardly in both directions from the raised center portion 28 into the outlet passages 30 through which the condensate and steam is forced through the ring groove 33 and the radial passages 34 out through the journal sleeve and discharge pipe similar to the method already described in connection with the disclosure of Figure 1.

\Ve are aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

We claim as our invention,:- r

1. A paper machine drier comprising a cylinder having a plurality of outlet passages at the end thereof, and an end closure plate secured to the cylinder and cut away to project therein,said closure plate having a plurality'of radial outlet passages therein and a ring groove which registers with the cylinder outlet passages and with the elosur plate radial outlet passages.

2. A paper machine drier comprising a cylinder having an inner peripheral groove therein, a ring flange integrally formed at the end of the cylinder having a plurality of outlet passages therein communicating with said inner peripheral groove, an end closure plate secured to the cylinder ring flange and cut away to project therein, and a journal sleeve formed on the closure plate, said closure plate having a plurality of radial outlet passages therein connected with the journal sleeve and a ring groove in the cut away portion which registers with the cylinder flange outlet passages and with the closure plate radial passages.

3. A paper machine drier comprising a cylinder having an inner peripheral groove, a rin flange integral with the end of the cylin er and having a plurality of outlet passages therein connected with said groove, an end plate secured to the cylinder flange and having a ring groove which registers with said outlet passages, a ournal sleeve integrally formed on said plate, said plate also having a plurality of passages therein connecting said ring groove with said jour nal sleeve,and a beveled journal ring secured on the end of said sleeve.

' 4. A paper machine drier comprising a 7 cylinder having an inner peripheral groove therein and a plurality of outlet passages leading from said groove, a closure plate secured to the cylinder having a ring groove and a plurality of outlet passages leading from said ring groove, said ring groove registering with the cylinder outlet passages, a journal sleeve formed on the closure plate, a beveled journal ring secured to the end of said journal sleeve, a steam inlet elbow, said elbow having a steam inlet passage and a condensate outlet passage therein, a rounded bearing flange integral on said elbow and contacting the beveled journal ring, means for adjusting the bearing flange with respect to said beveled journal ring, a steam supply pipe connected with the steam inlet passage ofsaid elbow, a discharge pipe connected with the condensate outlet passage of said elbow, a steam pipe projecting through the journal sleeve into the cylinder, a bearing collar on said steam pipe adapted to bear against the bearing flange on the steam elbow, and a bearing member for said steam inlet pipe rigidly secured to the inner surface of said closure plate.

5. A paper machine drier comprising a cylinder having a groove and outlet passages therein, an end plate secured to the cylinder having passages therein communicating with the cylinder outlet passages, a journal sleeve on said plate, a beveled journal ring secured thereon, a bearing member in said cylinder secured to the inner end of said sleeve, a steam inlet pipe projecting through said journal ring, sleeve and bearingmember, and a rounded bearing flange on said. steam pipe bearing against the beveled journal ring and against one end of said steam inlet pipe.

6. A paper machine drier comprising a cylinder having a groove and outlet passages therein, an end closure plate secured to the cylinder and having a groove and outlet passages therein communicating with the cyllnder groove and passages, a journal sleeve integrally formed on said plate, a steam inlet pipe projecting through said sleeve and plate into the cylinder, and a bearing member frictionally contacting said sleeve and pipe,

7. The combination with a paper drying cylinder and a journal sleeve formed thereon, of a journal ring secured to the sleeve having a curved bearing surface, a steam inlet elbow projecting through the ring into the sleeve, said elbow having a steam inlet passage and a condensate outlet passage therein, a flange on said elbow having a rounded bearing surface contacting the curved bearing surface of the journal ring, a steam supply pipe connected with the steam inlet passage of the elbow, a dis charge pipe connected with the condensate m0 outlet passage of the elbow, and adjustable means for varying the pressure of the rounded flange on the curved bearing surface of the journal ring.

8. The combination with a paper drying cylinder and a journal sleeve formed thereon, of a beveled journal ring securel to the sleeve, a steam inlet elbow, said elbow having a. steam inlet passage and a condensate 13 Bill llti

- outlet passage therein, alsupporting member llti . 1&1 11,575,249

, secured to the inner end ofsaid sleeve within the cylinder, a pipe'projecting through said sleeve and supportlng member into the cylinder, a bearing collar on the outer end of said pipe, a rounded flange on said elbow contacting the beveled journal ring and said collar, a steam supply pipe connected with the outer end of the elbow steam inlet passage, a suction pipe connected with the condensate outlet passage of the elbow, and adjustable means for varying the pressure of the rounded elbow flange on said beveled journal ring and with said bearing collar.

9. .Thecombination with a paper machine drier of a cylinder having an inner peripheral groove, of a flange integrally formed in the cylinderrandhaving a plurality of pasages therein leading from said cylinder groove to the outer side of the flange.

f 10. In adrying machine a grooved cylinder having condensate outlet passages in the end thereof communicating 'Wlth the grooves of the cylinder. v

11. In a paper drying machine an internally grooved drying cylinder, a steam inlet pipe projecting therein, said cylinder having condensate outlet passages therein independent of the steam inlet pipe.

12. In a paper drying machine a drying cylinder having an inner peripheral groove permitting a fihn of condensate formed within the cylinder when rotating at hi 11 speed to seek the level of the groove and e drawn oil.

In testimony whereof We have hereunto subscribed our names.

EARL nnwrn BERRY. nnnrnron N. ROSS.

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