US1795546A - Doll-head bearing for drying cylinders - Google Patents
Doll-head bearing for drying cylinders Download PDFInfo
- Publication number
- US1795546A US1795546A US406142A US40614229A US1795546A US 1795546 A US1795546 A US 1795546A US 406142 A US406142 A US 406142A US 40614229 A US40614229 A US 40614229A US 1795546 A US1795546 A US 1795546A
- Authority
- US
- United States
- Prior art keywords
- steam
- diaphragm
- closure member
- shaft
- doll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001035 drying Methods 0.000 title description 8
- 238000005266 casting Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001912 oat gum Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
- F16L27/082—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings having axial sealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/04—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies allowing adjustment or movement
Definitions
- This invention relates to improvements in the bearings for the trunnions or hollow shafts of steam heated revolving cylinders used in machines for. drying textile fabrics U and paper such as are known as doll head bearings.
- the diaphragm is anchored at the centre to a hollow support separate frombut aflixed to the doll head casting through which the steam passes and is attached at its periphery to the closure device which can move relatively to the fixed support, the closuremember being of such shape that a hollow steam chamber is formed between its inner surface and the diaphragm.
- the whole of the closure member is entirely free from thefixed doll head casting and the steam in the steam chamber since it acts in one direction in the diaphragm and in the opposite direction on the inner face of the closure member maintains the whole in a state of equilibrium.
- the area of the diaphragm on which the steam acts may be less than the area of the closure member so that the difference between these two areas forms the effective area for makingthe joint thus bringing about a closure without causing a great amount of friction between the closure member and the end of the trunnion and so reducing the wear between the closure member and the end of the revolving trunnion.
- a spring or a number of springs arranged circumferentially may be employed to keep the closure member normally against the end of the trunnion and the steam pressure acting on the effective area cause the face of the closure 00 member to'make a steam tight jointwith the end of the trunnion.
- the area of the diaphragm being less than the area of the closure member it could be equal thereto or greater than the 5 area of the closure member.
- the steam in the chamber would keep the closure member in equilibrium and in the latter would tend to move the member away from the cylinder end.
- the steam tight joint between the closure member and the end of the cylinder shaft would be maintained by the pressure of the spring.
- Fig. 1 is a transverse section through one form of the invention.
- Fig. 2 is a section on line 22 Fig. 1.
- F ig. 3 is a transverse section through anotherform of the invention.
- Fig. 4 is a transverse section through a modification of the invention having two'diaphragms.
- Fig. 5 is a transverse section through the bearing of a paper drying cylinder. 35
- an elbow casting A having a steam passage a is mounted on top of the doll head casting B.
- a screwed sleeveA is screwed into the outlet end of the steam passage a and an annular diaphragm C is clamped between the flanged end of the sleeve A and the end of the casting A.
- the closure member D D is aifixed bybolts d to the diaphragm G near the periphery thereof.
- the closure member D is formed in two parts D, D aifixed together by-the bolts (Z with a chamber D between them, into which chamber steam from the passage a can enter.
- the part D has a passage d for steam to enter the hollow shaft E and is formed with a machined face (l1 which bears against the end of the shaft E to make a steam tight joint therewith.
- the other member D has an extending flange d surrounding the elbow casting A and forming a housing for a spring A which bears at one end against the member D and at the other against the casting A.
- the whole of the closure member D D is thus entirely supported at the periphery of the diaphragm C and can move relatively to the casting A so that the face al can be pressed up against the end of the shaft E.
- the inner diameter of the annular diaphragm C is greater than the bore of the passage (Z through which the steam passes to the shaft E so that the area of the member D acted on by the pressure of the steam in the chamber D is greater than the area of the diaphragm C acted on by the steam pressure. Since the pressure of the steam tends to move the member D towards the shaft E and to move the diaphragm C in the opposite direction the diflerence between these two areas is the effective area the pressure on which forces the face d of the closure member against the end of the shaft.
- the spring A might be omitted and the pressure on the effective area be employed alone for making the joint it is preferred to employ the spring A which is of sufficient strength to hold the face (Z of the closure member against the end of the shaft and to employ the pressure on the effective area to ensure a tight joint between the face (Z and the shaft without causing a great amount of friction as the shaft rotates.
- the elbow casting A is formed with a flange a which is bolted to a flange on the doll head B so that the closure member D D and the casting A. can be readily removed from the doll head bearing for the purpose of replacement or repair.
- the construction of the closure member 13 ,13 is the same as that described with reference to Figs. 1 and 2.
- the diaphragm C is clamped at the centre between the screwed sleeve A and a tube F which is screwed into the doll head B and locked in position by the nut
- D can be removed from the doll head or adjusted relatively to the end of the shaft E.
- FIG. 5 shows the invention applied to the doll head bearing of a paper drying machine.
- the construction of the closure members D D is similar to that described with reference to Fig. 1.
- the bearing face (Z bears against a shoulder e on the shaft E instead of against the end thereof.
- the sleeve A clamping the diaphragm C at the centre is screwed into a sleeve A surrounding the shaft E and bolted to the doll head casting B.
- the two members D D of the closure device are separated by aring d and a second annular diaphragm C is clamped between the memher I) and the ring (P.
- a ring d is affixed to the second annular diaphragm C and the face oil of this ring makes contact with the end of the shaft E.
- the inner diameter of the diaphragm C is less than that of the diaphragm C so that the effective area acted on. by the steam to hold the ring d" against the end of the cylinder is the difference between the areas of the two diaphragn'is.
- the diaphragm C is clamped at the centre to an elbow casting k as described with reference to Fig. 1.
- a spring A presses the member D against the diaphragm C to keep it pressed forward towards the end of the shaft E.
- the area of the closure member ID is shown and described as being larger than the area of the diaphragm C its area may be equal to or less than that of the diaphragm in which cases the steam tight joint between the closure member and the end of the cylinder shaft would be maintained by the pressure of the spring and in the latter case the steam pressure would tend to move the closure member away from the cylinder end.
- the closure member maybe provided with a readily detachable seating either of metal or fibrous material to make a steam tight joint.
- the seating may be spherical or flat and may have a different diameter of bore to the passage through the shaft E to suit or balance various steam pressures.
- two or more of the diaphragms may be arranged one behind the other each diaphragm being carried on a central tube supported from the preceding diaphragms.
- the one may be constructed so that the steam will assist to force the closure member against the end of the cylinder and the other to move it away from the cylinder end.
- VJ hat I claim as my invention and desire to protect by Letters Patent is 1.
- a doll head bearing for the trunnion of a steam heated cylinder the combination with the closure member forming a steam tight joint with the end of the shaft of a non-rotating diaphragm to the periphery of which the closure member is affixed, and a central support independent of but affixed to the doll head casting to which the diaphragm is anchored at its centre.
- a doll head bearing for the trunnion of a steam heated cylinder the combination with the closure member forming a. steam tight joint with the end of the shaft of a nonrotating diaphragm to the periphery of which the closure member is affixed, a central hollow sleeve aiiixed to the doll head casting to which the diaphragm is anchored at its centre and a spring to assist the pressure of the steam in keeping the closure member against the end of the shaft.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Toys (AREA)
Description
March 10, 1931.
w. PTEVANS 1,795,546
DOLL HEAD BEARING FOR DRYING CYLINDERS Filed Nov. 9 1929 2 Sheets-Sheet 1 Q 1) 3 g d C N A2 a A c I A 1 a 131 By @AW HTTORNEV March 10, 1931. w,-p EVANS 1,795,546
DOLL HEAD BEARING FOR DRYING CYLINDERS Filed Nov. 9. 1929 2 SheetsSheet 2 4 2 A1 A s E 411) A? T v if u i i mvnvrop $00M Patented Mar. 10, 1931 PATENT OFFICE WILLIAM PARSONAG-E EVANS, OF SWIN'ION, ENGLAND DOLL-HEAD BEARING FOR DRYING CYLINDERS Application filed November 9, 1929, Serial No. 406,142, and in Great Britain. November 26, 1928'.
This invention relates to improvements in the bearings for the trunnions or hollow shafts of steam heated revolving cylinders used in machines for. drying textile fabrics U and paper such as are known as doll head bearings.
Owing to theexpansion of .such cylinders it isnec'essary to provide a yielding joint between thefixed pipe supplying the steam to the cylinder and it 1s also necessary to provide means whereby the joint will be broken when the supply of steam is cut off to prevent the formation of a partial vacuum in the cylinder. Joints for'this purpose are already known in 1 5 which the closure device-bearing against the end of the hollow trunnion is carried at the centre of a flexible diaphragm rigidly held around its periphery, the action of the steam pressure on the diaphragm being such that 10 it moves at the centre towards the cylinder trunnion and holds the closure device tightly against the end thereof. When the supply of steam iscut off however the contraction of the cylinder causes the end of the trunnions to move away from the closure device and opens the inside of the cylinder to the atmosphere thereby preventing the formation ofa partial vacuum within the cylinder. Accordingto the present invention the diaphragm is anchored at the centre to a hollow support separate frombut aflixed to the doll head casting through which the steam passes and is attached at its periphery to the closure device which can move relatively to the fixed support, the closuremember being of such shape that a hollow steam chamber is formed between its inner surface and the diaphragm. V
By this arrangement the whole of the closure member is entirely free from thefixed doll head casting and the steam in the steam chamber since it acts in one direction in the diaphragm and in the opposite direction on the inner face of the closure member maintains the whole in a state of equilibrium. The area of the diaphragm on which the steam acts may be less than the area of the closure member so that the difference between these two areas forms the effective area for makingthe joint thus bringing about a closure without causing a great amount of friction between the closure member and the end of the trunnion and so reducing the wear between the closure member and the end of the revolving trunnion. If desired a spring or a number of springs arranged circumferentiallymay be employed to keep the closure member normally against the end of the trunnion and the steam pressure acting on the effective area cause the face of the closure 00 member to'make a steam tight jointwith the end of the trunnion.
Instead of the area of the diaphragm being less than the area of the closure member it could be equal thereto or greater than the 5 area of the closure member. In the former case the steam in the chamber would keep the closure member in equilibrium and in the latter would tend to move the member away from the cylinder end. In both cases the steam tight joint between the closure member and the end of the cylinder shaft would be maintained by the pressure of the spring.
The invention will be described with reference to the accompanying drawings Fig. 1 is a transverse section through one form of the invention.
Fig. 2 is a section on line 22 Fig. 1.
F ig. 3 is a transverse section through anotherform of the invention.
Fig. 4 is a transverse section through a modification of the invention having two'diaphragms.
Fig. 5 is a transverse section through the bearing of a paper drying cylinder. 35
In the form of the invention shown in Figs.
1 and-2 an elbow casting A having a steam passage a is mounted on top of the doll head casting B. A screwed sleeveA is screwed into the outlet end of the steam passage a and an annular diaphragm C is clamped between the flanged end of the sleeve A and the end of the casting A. The closure member D D is aifixed bybolts d to the diaphragm G near the periphery thereof. The closure member D is formed in two parts D, D aifixed together by-the bolts (Z with a chamber D between them, into which chamber steam from the passage a can enter. The part D has a passage d for steam to enter the hollow shaft E and is formed with a machined face (l1 which bears against the end of the shaft E to make a steam tight joint therewith. The other member D has an extending flange d surrounding the elbow casting A and forming a housing for a spring A which bears at one end against the member D and at the other against the casting A. The whole of the closure member D D is thus entirely supported at the periphery of the diaphragm C and can move relatively to the casting A so that the face al can be pressed up against the end of the shaft E.
The inner diameter of the annular diaphragm C is greater than the bore of the passage (Z through which the steam passes to the shaft E so that the area of the member D acted on by the pressure of the steam in the chamber D is greater than the area of the diaphragm C acted on by the steam pressure. Since the pressure of the steam tends to move the member D towards the shaft E and to move the diaphragm C in the opposite direction the diflerence between these two areas is the effective area the pressure on which forces the face d of the closure member against the end of the shaft.
Although the spring A might be omitted and the pressure on the effective area be employed alone for making the joint it is preferred to employ the spring A which is of sufficient strength to hold the face (Z of the closure member against the end of the shaft and to employ the pressure on the effective area to ensure a tight joint between the face (Z and the shaft without causing a great amount of friction as the shaft rotates.
The elbow casting A is formed with a flange a which is bolted to a flange on the doll head B so that the closure member D D and the casting A. can be readily removed from the doll head bearing for the purpose of replacement or repair.
In the form of the invention shown in Fig. 3 the construction of the closure member 13 ,13 is the same as that described with reference to Figs. 1 and 2. The diaphragm C is clamped at the centre between the screwed sleeve A and a tube F which is screwed into the doll head B and locked in position by the nut Thus by slacking off the nut f the tube F and closure member I), D can be removed from the doll head or adjusted relatively to the end of the shaft E.
5 shows the invention applied to the doll head bearing of a paper drying machine. The construction of the closure members D D is similar to that described with reference to Fig. 1. The bearing face (Z however bears against a shoulder e on the shaft E instead of against the end thereof. The sleeve A clamping the diaphragm C at the centre is screwed into a sleeve A surrounding the shaft E and bolted to the doll head casting B.
In the arrangement shown in Fig. ti: the
two members D D of the closure device are separated by aring d and a second annular diaphragm C is clamped between the memher I) and the ring (P. A ring d is affixed to the second annular diaphragm C and the face oil of this ring makes contact with the end of the shaft E. The inner diameter of the diaphragm C is less than that of the diaphragm C so that the effective area acted on. by the steam to hold the ring d" against the end of the cylinder is the difference between the areas of the two diaphragn'is. The diaphragm C is clamped at the centre to an elbow casting k as described with reference to Fig. 1. A spring A presses the member D against the diaphragm C to keep it pressed forward towards the end of the shaft E.
Although in the drawings the area of the closure member ID is shown and described as being larger than the area of the diaphragm C its area may be equal to or less than that of the diaphragm in which cases the steam tight joint between the closure member and the end of the cylinder shaft would be maintained by the pressure of the spring and in the latter case the steam pressure would tend to move the closure member away from the cylinder end.
The closure member maybe provided with a readily detachable seating either of metal or fibrous material to make a steam tight joint. The seating may be spherical or flat and may have a different diameter of bore to the passage through the shaft E to suit or balance various steam pressures.
If desired two or more of the diaphragms may be arranged one behind the other each diaphragm being carried on a central tube supported from the preceding diaphragms.
Where two doll heads are employed one at either end of a drying cylinder the one may be constructed so that the steam will assist to force the closure member against the end of the cylinder and the other to move it away from the cylinder end.
VJ hat I claim as my invention and desire to protect by Letters Patent is 1. In a doll head bearing for the trunnion of a steam heated cylinder the combination with the closure member forming a steam tight joint with the end of the shaft of a non-rotating diaphragm to the periphery of which the closure member is affixed, and a central support independent of but affixed to the doll head casting to which the diaphragm is anchored at its centre.
2. In a doll head bearing for the trunnion of a steam heated cylinder the combination with the closure member forming a. steam tight joint with the end of the shaft of a nonrotating diaphragm to the periphery of which the closure member is affixed, a central hollow sleeve aiiixed to the doll head casting to which the diaphragm is anchored at its centre and a spring to assist the pressure of the steam in keeping the closure member against the end of the shaft.
3. In a doll head bearing for the trunnion of a steam heated cylinder the combination with the closure member forming a steam tight oint With the end of the shaft of a nonrotating diaphragm, a central support independent of but aflixed to the doll head casting to which the diaphragm is anchored at its centre, a second diaphragm afiixed at its periphery to the first diaphragm and carrying the closure member at its centre.
In testimony whereof I have hereunto set my hand.
WILLIAM PARSONAGE EVANS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1795546X | 1928-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1795546A true US1795546A (en) | 1931-03-10 |
Family
ID=10890801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US406142A Expired - Lifetime US1795546A (en) | 1928-11-26 | 1929-11-09 | Doll-head bearing for drying cylinders |
Country Status (1)
Country | Link |
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US (1) | US1795546A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2438141A (en) * | 1945-07-09 | 1948-03-23 | Pusey & Jones Corp | Steam joint supporting structure |
US2559963A (en) * | 1945-10-15 | 1951-07-10 | Rotary Seal Company | Bearing seal |
US2559964A (en) * | 1945-10-17 | 1951-07-10 | Rotary Seal Company | Bearing seal |
US2593899A (en) * | 1946-03-11 | 1952-04-22 | Chicago Rawhide Mfg Co | Seal |
-
1929
- 1929-11-09 US US406142A patent/US1795546A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2438141A (en) * | 1945-07-09 | 1948-03-23 | Pusey & Jones Corp | Steam joint supporting structure |
US2559963A (en) * | 1945-10-15 | 1951-07-10 | Rotary Seal Company | Bearing seal |
US2559964A (en) * | 1945-10-17 | 1951-07-10 | Rotary Seal Company | Bearing seal |
US2593899A (en) * | 1946-03-11 | 1952-04-22 | Chicago Rawhide Mfg Co | Seal |
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