US1859975A - Steam fitting for journals of rotating cylinders and the like - Google Patents

Description

B. A.- MALKlN May 24, 1932.

STEAM FITTING FOR JOURNALS OF ROTATING CYLINDERS AND THE LIKE Filed May 25. 1929 INVENTOR BERNARDAM LKIN BY ATTORNEYS Patented May 24, 1932 UNITED STA ES PATENT? OFFICE;

BERNARD A. MAIJKIN, or LA INE, QUEBEC, CANADA 1 STEAM FITTING non JOURNALS or ROTATING CYLINDERS Ann Linn Application filed May 25,

This invention relates to new and useful improvements in steam fittings and particularly to steam fittings in journals of rotating cylinders and the like. V

In paper making machines and particu-' larly the drier section thereof, there is con-v siderable expansion and contraction in the lengths of the drying cylinders due to the variation in temperature and there is also IO GC'CeIItI'iC movement of the end of the jour-- nal due to unequal expansion and contraction of theheads. Steam is fed to'these cylinders and the water of condensation is drawn off. The steam and water connections must pass through the centres of rotation of the cylinders that is through the journals. It has been found a very difficult matter to obtain a sealed connection which will'not work loose through time due to the length- 2 wise movement of the rolls and also eccentric movement of the heads. If the steam pipes are continuous and are left loose or are attached to a fixed part of the machine, the resulting movement of the roll usually breaks 2511116 seal and stoppages due to this cause are frequent. With the usual form of steam fitting now in use, the steam connecting pipes are necessarily a comparatively large distance from 3.0. the end of the journal and therefore some tached to the end of the journal and forms part of a sphere, the centre of which is in the plane of the centre of the journal orbearing therefor, so that any eccentric movement of the dryer journal will not tend tomove the coacting sealing washer attached to the flexible connection. The members, used for.

bolting the fitting to the frame work of the machine, are made hollow, and are used for work as possible. The coacting sealing washvention,

. 111 means.

1929. Serial N 0. 366,059.

the passage of the inlet steam and exhaust water or steam. This arrangement allows theplpes to be placed as close to the frameers are flexibly held together- In the drawings which illustrate my. inj Figure 1 is a longitudinal sectional elevation of my improved steam and water connection. V V

Figure 2 is an end view of the connection shown in Figure 1 with the pipe adjusting means removed. v

. Figure 3 is an end View of the pipe adjustigure 4 is a plan view of the device shown '1 in Figure 1. V v

Referring more particularly to the drawings, 11 designates thecentre of a journal 12, which is mounted on suitable self aligning bearings notshown. The journal forms part of a drying cylinderof apaper making I machine into which a drying agent such as steam is fedandthe waterof; condensation is drawn OR; -The journal rotates within a bearing housing 13 only part ofwhich is shown. Secured to the end of thejournalf by the set screws 14 .isthe sealing washer '15 the surface 16 of which is radially dis:

posed to the centre 11. Secured to the bearing housing 13 by suitable screw bolts 14 is the steam connection casting17 which is-pro- .Vided witha pair of hollow arms 18 and 19, the former communicating with .thespace 20 for the-admission of steam to the cylinder and the latter arm 19 communicates withthe space 21 toallow water. to be drawn off in the manner hereinafter described. These armsrextend outwardly fro'meachside of; the casting and then are turned inwardly toward the base 17a of the casting 17. 'Fit- 7 tingagainst the sealing washer 15 is a 0011-; vex washer 22, the surface 23. of which fits closely against the surface 16. The surface 23 is preferably made larger than the surface 16 so that any relative radial movement between thesurfaces will not break the seal formed therebetween. Thewashers are frictionally held togetherby means of compres-. sion springs 24 only one ofwhichis shown.

' housing and it will be evident that 'there' is therefore a movement between the surface therein.

provided with a shoulder 41a.

tudinal direction to regulate the pressure'ba tween the rotating washer 15 and the washer 22.

It is well known that there is'a longitudinal movement of the ournal in the bearing 30 of the casting and the washer 22'. To provide a flexible steam tight connection be tween said washer and the casting, a corrugated pipe or bellows 31 is provided one end of which is clamp ed to the washer 22 by means of the ring 32 and screws 33 while the other end is clamped to the surface 30 by means of the washer or clamping member 34 and screws 35. It will be seen that steam is fed through the pipe 36, the arm 18 into the space 20 and from thence through the bellows into the drying cylinder through the hollow portion 37 of the journal. Extending through the centre of the housing and the castingis the drain pipe 38. The drain pipe extends through the centre of rotationof the journal andis bent at its free end so that the inlet end 39 lies in proximity to, but clear of the inner surface of the drying cylinder. The arm 19 extends into the space 21 which surrounds the pipe 38 and communicates therewith through apertures 40 formed in the wall thereof; The pipe is held centrally within the casting by means of the hub 41 Fitting against the hub is the packing ring 42. A

spacing member 43 having apertures formed in the wall thereof surrounds the pipe in proximity to the chamber 21 and said member 43 is held against the packing ring 42 by the externally threaded gland 44 which engages with the casting. A second packing ring 45 is placed between the member 43 and the gland. A pipe 47 communicates with the space 21 and is connected to a source of suction not shown. The pipe 38 extends through the gland into a cap 48 having an arm 49 with a threaded hole 50 formed therein. This cap is rigidly secured to the pipe so that by moving the arm the pipe is turned within the cylinder to suit the locationof the water through the slot 52a formed in theflange 7 52of the casting and engages with'the hole bricator 54 may be provided on the fixed sealing washer. The inside diameter of the fixed seahng washer is preferably made smaller A screw threaded bolt 51 passes than the bore of the rotating sealing washer, so that there is always a pressure action against the springs. This acts as a safety valve for should the pressure exceed a predetermined amount, the pressure against the fixed washer compresses the springs and allows the steam within the cylinder to escape between the sealing washers. As soon as the steam feed reaches the desired working pressure, the spring acting on the washer closes the seal automatically.

In operation, steam is fed through the pipe 36, the arm 18, into the space and from thence it passes into the cylinder. The steam on entering the cylinder tends to expand same and the movement of the hub is towards the casting which is fixed to the bearing housing. This expansion is taken up on the bellows so that there is no movement which will affect the vertical position of the pipe. The uneven heating of the roll andthe frame not shown which supports the housing and also the heating of the pipe causes a movement between them, as their co-efiicients of expansion due to heat are different and also their degrees of temperatures, are different. This difference in .movement is taken care of by the co-,'acting convex and concave sealing washers and as the radius of these washers is coincident with the centre of the selfaligning bearing, it is evident that the relative movement of the washers is taken care of to the best advantage. The steam on entering the cylinder expands and as it is used as a drying agent it comes in contact with the walls of the cylinder, it condenses and the water'of condensation falls to the bottom part of the rotating cylinder. The free'end of the pipe 38 enters the water in the cylinder and the water is drawn by pressure difference through the'pipe into the space 21 throughthe apertures and then passes through t e arm in communication through to the suction P P a V The'device is very simple to erect and as there is substantially no outward movement of thesection and steam feed pipes so that same may be clamped to the bearing housing or to the frame, the bent pipe may be turned to suit the water in the cylinder and it will be readily seen that the depth of water may be gauged very easily by the movement of the pipe. I I 7 Having thus described my invention, what I claim is: V

'1. In combination, a bearing housing, a

hollow rotatable element therein, a stationporting said casting directly on said bearing housing and in spaced confronting relation with the adjacent end of the rotatable element, a steam supply pipe for oneof said chambers supported by the casting, and a drain pipe carried by the casting and arranged axially within said rotatable element;

2. In combination, a bearing housing, a hollow rotatable element therein, a stationary casting including a steam receiving chamber and a water receiving chamber communieating with said hollow element, meansfor supporting said casting directly on the bearing housing in spaced confronting relation 19 to said hollow element, a steam supply pipe for one of said chambers, a drain pipe care ried by the casting and arranged axially within the hollow element, and a steam-tight connection located between said casting and 16 the adjacent end of said hollow element.

3. In combination, a bearing housing, a hollow rotatable element therein, a stationary casting including a steam receiving chamber and a water receiving chamber communi- 20 eating with said hollow element, means for supporting said casting directly on the bearing housing in spaced confronting relation to said hollow element, a steam pipe for one of said chambers, a drain pipe carried by 2 the casting and arranged axially within said hollow element, a hub formed centrally of said casting and receiving said drain pipe, a portion of said water receiving "chamber communicating with said drain pipe through openings in the latter, and a steam-tight connection arranged concentrically about said hub and located between the casting and the adjacent end of said rotatable element.

In witness whereof, I have hereunto set my hand.

BERNARD A. MALKIN.

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