CA1134406A - Rotary seal unit - Google Patents
Rotary seal unitInfo
- Publication number
- CA1134406A CA1134406A CA000344835A CA344835A CA1134406A CA 1134406 A CA1134406 A CA 1134406A CA 000344835 A CA000344835 A CA 000344835A CA 344835 A CA344835 A CA 344835A CA 1134406 A CA1134406 A CA 1134406A
- Authority
- CA
- Canada
- Prior art keywords
- component
- axially
- shaft
- sealing
- seal
- 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
Links
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
- 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
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3464—Mounting of the seal
- F16J15/348—Pre-assembled seals, e.g. cartridge seals
- F16J15/3484—Tandem seals
-
- 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
- F16L27/087—Joints with radial fluid passages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/907—Passageway in rod or shaft
Abstract
ABSTRACT
A rotary seal unit is fitted between a shaft and a surrounding member. The unit comprises a runner fixed to the shaft and within an outer housing fixed to the surround member. Mating sealing rings are carried one by the housing and the other by the runner. One of the rings is axially fixed while the other is axially slidable and urged by springs towards said one ring. The housing encloses and protects the sealing rings prior to and during fitting.
A soft (or hard) setting ring is provided to axially locate the axially fixed ring and the component carrying the other ring, but permitting rotation between them, so that the spring loading of the rings is not disturbed during fitting The softer material wears away in use. The setting ring also protects against entry of dirt.
A rotary seal unit is fitted between a shaft and a surrounding member. The unit comprises a runner fixed to the shaft and within an outer housing fixed to the surround member. Mating sealing rings are carried one by the housing and the other by the runner. One of the rings is axially fixed while the other is axially slidable and urged by springs towards said one ring. The housing encloses and protects the sealing rings prior to and during fitting.
A soft (or hard) setting ring is provided to axially locate the axially fixed ring and the component carrying the other ring, but permitting rotation between them, so that the spring loading of the rings is not disturbed during fitting The softer material wears away in use. The setting ring also protects against entry of dirt.
Description
113~40~
ROTARY SEAL UNIT
m is invention relates to a seal for fitting around a shaft and in association with a member with which the shaft is relatively rotatable. It is especially applicable to permitting the transfer of fluid to or from a passage in the sha~t.
Mechanical seals are used to prevent leakage between separate spaces through which a rotary shaft passes. Frequently fluid in one space is at a higher pressure than in an adjacent space, so that the seal has to withstand this pressure difference. These seals generally rely on the intimate contact between two annular sealing faces which meet at a sealing plane at right-angles to the shaft axis. The force keeping the faces together is provided by fluid pressure, or spring forces or both. Where springs are used, they have to be correctly set. In some cases, two or more seals are provided along the shaft, so as to define a space between ad~acent seals which can be filled with a different fluid from that in the adjacent spaces. Usually this is done so that fluid can be transmitted from a passage in the stationary surround member and a passage in the rotary shaft. This may be used for example in supplying water along the shaft to a cutting head of a road-header machine used in coal mines, or in supplying pneumatic or hydraulic fluid to a shaft for operating a control mechanism at a remote position along the shaft. Another application of a rotary seal is in simply supplying fluid to a passage in a rotary shaft from a stationary source without leakage o~ the fluid.
The main problems with installing rotary seals on equipment is to ensure that the seal is correctly set when installed, and to avoid damage to the seal, in particular the sealing faces, during storage, transport, handling and installation of the seal.
The present invention provides in one aspect a ,~
. '`
1~.3 ~ ~ 6 rotary seal for establishing a seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising: an annular outer component which is to be rotatable relative to the shaft; an annular runner component which is to be secured around the shaft; ~ first sealing member carried by the outer component; a second sealing member carried by the runner component; one of said first and second sealing members being axially located on the said component which carries it; the other of said first and second sealing members being axially slidable on the said component which carries it; spring means acting between said other sealing member and the component carrying said other sealing member to urge said other sealing member into sealing engagement with said one sealing ~ember, thereby establishing an annular seal separating spaces on either side; and a - setting ring engaging axially between said components and rotatable relative to at least one of them so as to locate axially the two said components relative to each other while allowing them to rotate relative to each other, the setting ring being of a material of substantially different hardness from the material of a said component with which it is in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting ring and at least one of said components.
In another aspect the invention provides a rotary seal for establishing a seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising: an annular outer component which is to be rotatable relative to the shaft; an annular runner component which is to be secured around the shaft; a first pair of axially spaced apart ~34~06 sealing member~ carried by the outer component; a second pair of axially spaced apart ~ealing members ¦ .
carried by the runner component, one pair of said first and second sealing member pairs being axially located on the said component which carries them; .the other pair of said first and second sealing member pairs being axially slidable on the said component which carries them; spring means acting between said other pair of sealing members and the component carrying said other pair of sealing members to urge said other pair of sealing ~embers into sealing engagement with said one pair of sealing members, thereby establishing two annular seals with a fluid-containing space between them; and a pair of setting rings engaging axially between said components and rotatable relative to at least one of them so as to locate the two said components relative to each other axially in either direction while allowing them to rotate relative to each other, the setting rings being of a material of substantially di~ferent hardness from the material of said componen~ with which they are in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting rings and at least one of said components.
It is preferred to provide ~or said one sealing member a setting ring which acts between that sealing member and the component which carries the other sealing member to locate said one sealing member against axial movement towards the mating sealing member, the setting ring being rotatable relative to either or both of the parts which it engages and of a material of relatively different hardness, so that after the seal has been running for some time the softer material wears away to provide a clearance '~, ~L34~06 -- 4 -- ff between the setting ring and one or both of said parts. f In order that the invention may be mC~re clearly understood, one embodiment will now be described with f`
reference to the accompanying drawing9 wherein Fig. 1 shows a diametrical cross-sectional view through an annular seal in use.
Referring to Fig. 1; the seal is located in an annular gap between a shaft 10 which rotates about its axis 12 and a relatively stationary surround member 14. The seal comprises an annular housing component 16 which fits closely against the stationar,~ member 14 and is sealed thereto by O~rings 18. It is located axially by end abutment members 20, which are associated with the stationary member 14 (and are not part of the seal assembly itself). A key 22 is provided between the housing 16 and one of the locating members 20 so as to prevent rotation of the housing 16 relative to the stationary member 14. A pair of annular sealing ring supports 24 are a close fit within end portions of the housing 16, and are sealed thereto by 0-rings 26.
They engage inner shoulders in the housing 16 and are located against axial movement outwardly of the housing 16-by means of circlips 28, each of which has a radial flange 30 at one point which provides a key preventing relative rotation between its respective sealing ring support and the housing.
Each sealing ring support 24 carries an annular sealing ring 31 which provides a flat sealing face in a plane at right angles to the axis 12. m e sealing rings 31 mate with a second pair of annular sealing rings 32 which are carried on a runner 34 which is in the form ~13~4~6 5_ of a sleeve which closely fits around the shaft 10, is sealed thereto by 0-rings 36, and is secured against axial displacement and against rotation relative to the shaft by means of a locking ring 38 having one or more clamping screws 40. The sealing rings 32 are sealed to the runner by means of 0-rings 42. Axial keys 45 locate the sealing rings 32 against rotation relativ~ to the runner, while allowing free relative axial movement between them. A
series of compression springs 44 are distributed around the axis 12 and act between the runner and the two sealing rings 32 so as to urge the sealing rings mutually outwardly into contact with their co-operating sealing rings ~1.
It will be seen that a fluid-containing space 46 is thereby established between the two seals provided by the sealing members 31,32. (The fluid is of course initially air, but may in use be other gases or liquids.) The space 46 opens radially inwardly to a series of radial passages 48 in the runner. These passages communicate with an annuiar recess 50 on the inside face of the runner. The space 46 communicates radially outwardly through inclined passages 52 in the housing 16, which communicate with an annular recess 54 in the outside face of the housing. In the arrangement shown, the annular recess 54 communicates with a fluid transfer passage 56 in the stationary member 14, and the annular recess 50 communicates with a radial fluid transfer passage 58 in the shaft 10, which in turn communicates with an axial fluid transfer passage 60 in the shaft. It will be seen, therefore, that the seal allows continuous fluid transfer between the fixed passage 56 and the rotating passage 58.
A particular feature of the seal is that all the principal sealing components are enclosed within the housing 16, and are thus protected thereby. There is thus small risk of damage to these precision-made, delicate components during storage~ handling and fitting of the seal. It will also be seen, however, that if the s' i ~-1~3~)6 seal has only the oonstruction just described, the r~nner 34 will be axially displaceable relative to the housing 16. The springs 44 will normally keep the runner in a central equilibrium position, but in the course of fitting the seal, the runner can easily become axially displaced from this position, with the result that the pressure in the 8Prings 44 on one side is different from that in the springs on the other side, resulting in an excessive loading of one bearing, and perhaps ~0 insufficient loading on the other bearing. To counteract this, two setting rings 62 are provided around the runner~ They are axially located mutually inwardly by seating against shoulders 64 on the runner.
The setting rings are of generally L cross-section, providing mutually outwardly directed annular ribs 66 which initially slidably engage the sealing ring supports 24, as shown. m e setting rings thus locate the runner centrally with respect to the sleeve 16 during the installation of the seal, and allow rotation o~ the runner relative to the housing 16 during use.
However, the setting rings are made of relatively soft material, and quickly wear, either against the runner or against the sealing ring supports 24, or both, thereby establishing a clearance so that the setting rings offer virtually no resistance to the operation of the seai.
Another use of the setting rings is in closing the annular gap between the run~ler and the sealing ring supports 24, before the seal is installed, thereby minimising the danger of dirt or other undesirable matter getting into this space and coming into contact with the sealing surfaces.
The foregoing embodiment is intended merely as one example of the way in which the present invention can be carried out. The housing 16 can be located and secured to the stationary member 14 in a variety of ways, ,~
-, 113~06 dependLng upon the shape of the stationary member, and similarly the runner can be secured to the shaft in a variety of different ways, depending upon the shape of the shaft. The.passages 52 in the housing can be arranged in the optimum position for directing the flow of fluid around the bearing-surfaces to keep cool and clean. m is is the reason why passages 52 in this embodiment are divergent to~ards the sealing ring supports 24.
ROTARY SEAL UNIT
m is invention relates to a seal for fitting around a shaft and in association with a member with which the shaft is relatively rotatable. It is especially applicable to permitting the transfer of fluid to or from a passage in the sha~t.
Mechanical seals are used to prevent leakage between separate spaces through which a rotary shaft passes. Frequently fluid in one space is at a higher pressure than in an adjacent space, so that the seal has to withstand this pressure difference. These seals generally rely on the intimate contact between two annular sealing faces which meet at a sealing plane at right-angles to the shaft axis. The force keeping the faces together is provided by fluid pressure, or spring forces or both. Where springs are used, they have to be correctly set. In some cases, two or more seals are provided along the shaft, so as to define a space between ad~acent seals which can be filled with a different fluid from that in the adjacent spaces. Usually this is done so that fluid can be transmitted from a passage in the stationary surround member and a passage in the rotary shaft. This may be used for example in supplying water along the shaft to a cutting head of a road-header machine used in coal mines, or in supplying pneumatic or hydraulic fluid to a shaft for operating a control mechanism at a remote position along the shaft. Another application of a rotary seal is in simply supplying fluid to a passage in a rotary shaft from a stationary source without leakage o~ the fluid.
The main problems with installing rotary seals on equipment is to ensure that the seal is correctly set when installed, and to avoid damage to the seal, in particular the sealing faces, during storage, transport, handling and installation of the seal.
The present invention provides in one aspect a ,~
. '`
1~.3 ~ ~ 6 rotary seal for establishing a seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising: an annular outer component which is to be rotatable relative to the shaft; an annular runner component which is to be secured around the shaft; ~ first sealing member carried by the outer component; a second sealing member carried by the runner component; one of said first and second sealing members being axially located on the said component which carries it; the other of said first and second sealing members being axially slidable on the said component which carries it; spring means acting between said other sealing member and the component carrying said other sealing member to urge said other sealing member into sealing engagement with said one sealing ~ember, thereby establishing an annular seal separating spaces on either side; and a - setting ring engaging axially between said components and rotatable relative to at least one of them so as to locate axially the two said components relative to each other while allowing them to rotate relative to each other, the setting ring being of a material of substantially different hardness from the material of a said component with which it is in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting ring and at least one of said components.
In another aspect the invention provides a rotary seal for establishing a seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising: an annular outer component which is to be rotatable relative to the shaft; an annular runner component which is to be secured around the shaft; a first pair of axially spaced apart ~34~06 sealing member~ carried by the outer component; a second pair of axially spaced apart ~ealing members ¦ .
carried by the runner component, one pair of said first and second sealing member pairs being axially located on the said component which carries them; .the other pair of said first and second sealing member pairs being axially slidable on the said component which carries them; spring means acting between said other pair of sealing members and the component carrying said other pair of sealing members to urge said other pair of sealing ~embers into sealing engagement with said one pair of sealing members, thereby establishing two annular seals with a fluid-containing space between them; and a pair of setting rings engaging axially between said components and rotatable relative to at least one of them so as to locate the two said components relative to each other axially in either direction while allowing them to rotate relative to each other, the setting rings being of a material of substantially di~ferent hardness from the material of said componen~ with which they are in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting rings and at least one of said components.
It is preferred to provide ~or said one sealing member a setting ring which acts between that sealing member and the component which carries the other sealing member to locate said one sealing member against axial movement towards the mating sealing member, the setting ring being rotatable relative to either or both of the parts which it engages and of a material of relatively different hardness, so that after the seal has been running for some time the softer material wears away to provide a clearance '~, ~L34~06 -- 4 -- ff between the setting ring and one or both of said parts. f In order that the invention may be mC~re clearly understood, one embodiment will now be described with f`
reference to the accompanying drawing9 wherein Fig. 1 shows a diametrical cross-sectional view through an annular seal in use.
Referring to Fig. 1; the seal is located in an annular gap between a shaft 10 which rotates about its axis 12 and a relatively stationary surround member 14. The seal comprises an annular housing component 16 which fits closely against the stationar,~ member 14 and is sealed thereto by O~rings 18. It is located axially by end abutment members 20, which are associated with the stationary member 14 (and are not part of the seal assembly itself). A key 22 is provided between the housing 16 and one of the locating members 20 so as to prevent rotation of the housing 16 relative to the stationary member 14. A pair of annular sealing ring supports 24 are a close fit within end portions of the housing 16, and are sealed thereto by 0-rings 26.
They engage inner shoulders in the housing 16 and are located against axial movement outwardly of the housing 16-by means of circlips 28, each of which has a radial flange 30 at one point which provides a key preventing relative rotation between its respective sealing ring support and the housing.
Each sealing ring support 24 carries an annular sealing ring 31 which provides a flat sealing face in a plane at right angles to the axis 12. m e sealing rings 31 mate with a second pair of annular sealing rings 32 which are carried on a runner 34 which is in the form ~13~4~6 5_ of a sleeve which closely fits around the shaft 10, is sealed thereto by 0-rings 36, and is secured against axial displacement and against rotation relative to the shaft by means of a locking ring 38 having one or more clamping screws 40. The sealing rings 32 are sealed to the runner by means of 0-rings 42. Axial keys 45 locate the sealing rings 32 against rotation relativ~ to the runner, while allowing free relative axial movement between them. A
series of compression springs 44 are distributed around the axis 12 and act between the runner and the two sealing rings 32 so as to urge the sealing rings mutually outwardly into contact with their co-operating sealing rings ~1.
It will be seen that a fluid-containing space 46 is thereby established between the two seals provided by the sealing members 31,32. (The fluid is of course initially air, but may in use be other gases or liquids.) The space 46 opens radially inwardly to a series of radial passages 48 in the runner. These passages communicate with an annuiar recess 50 on the inside face of the runner. The space 46 communicates radially outwardly through inclined passages 52 in the housing 16, which communicate with an annular recess 54 in the outside face of the housing. In the arrangement shown, the annular recess 54 communicates with a fluid transfer passage 56 in the stationary member 14, and the annular recess 50 communicates with a radial fluid transfer passage 58 in the shaft 10, which in turn communicates with an axial fluid transfer passage 60 in the shaft. It will be seen, therefore, that the seal allows continuous fluid transfer between the fixed passage 56 and the rotating passage 58.
A particular feature of the seal is that all the principal sealing components are enclosed within the housing 16, and are thus protected thereby. There is thus small risk of damage to these precision-made, delicate components during storage~ handling and fitting of the seal. It will also be seen, however, that if the s' i ~-1~3~)6 seal has only the oonstruction just described, the r~nner 34 will be axially displaceable relative to the housing 16. The springs 44 will normally keep the runner in a central equilibrium position, but in the course of fitting the seal, the runner can easily become axially displaced from this position, with the result that the pressure in the 8Prings 44 on one side is different from that in the springs on the other side, resulting in an excessive loading of one bearing, and perhaps ~0 insufficient loading on the other bearing. To counteract this, two setting rings 62 are provided around the runner~ They are axially located mutually inwardly by seating against shoulders 64 on the runner.
The setting rings are of generally L cross-section, providing mutually outwardly directed annular ribs 66 which initially slidably engage the sealing ring supports 24, as shown. m e setting rings thus locate the runner centrally with respect to the sleeve 16 during the installation of the seal, and allow rotation o~ the runner relative to the housing 16 during use.
However, the setting rings are made of relatively soft material, and quickly wear, either against the runner or against the sealing ring supports 24, or both, thereby establishing a clearance so that the setting rings offer virtually no resistance to the operation of the seai.
Another use of the setting rings is in closing the annular gap between the run~ler and the sealing ring supports 24, before the seal is installed, thereby minimising the danger of dirt or other undesirable matter getting into this space and coming into contact with the sealing surfaces.
The foregoing embodiment is intended merely as one example of the way in which the present invention can be carried out. The housing 16 can be located and secured to the stationary member 14 in a variety of ways, ,~
-, 113~06 dependLng upon the shape of the stationary member, and similarly the runner can be secured to the shaft in a variety of different ways, depending upon the shape of the shaft. The.passages 52 in the housing can be arranged in the optimum position for directing the flow of fluid around the bearing-surfaces to keep cool and clean. m is is the reason why passages 52 in this embodiment are divergent to~ards the sealing ring supports 24.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A rotary seal for establishing & seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising:
an annular outer component which is to be rotatable relative to the shaft;
an annular runner component which is to be secured around the shaft;
a first sealing member carried by the outer component;
a second sealing member carried by the runner component;
one of said first and second sealing members being axially located on the said component which carries it;
the other of said first and second sealing members being axially slidable on the said component which carries it; spring means acting between said other sealing member and the component carrying said other sealing member to urge said other sealing member into sealing engagement with said one sealing member, thereby establishing an annular seal separating spaces on either side; '' and a setting ring engaging axially between said components and rotatable relative to at least one of them so as to locate axially the two said components relative to each other while allowing them to rotate relative to each other, the setting ring being of a material of substantially different hardness from the material of a said component with which it is in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting ring and at least one of said components.
an annular outer component which is to be rotatable relative to the shaft;
an annular runner component which is to be secured around the shaft;
a first sealing member carried by the outer component;
a second sealing member carried by the runner component;
one of said first and second sealing members being axially located on the said component which carries it;
the other of said first and second sealing members being axially slidable on the said component which carries it; spring means acting between said other sealing member and the component carrying said other sealing member to urge said other sealing member into sealing engagement with said one sealing member, thereby establishing an annular seal separating spaces on either side; '' and a setting ring engaging axially between said components and rotatable relative to at least one of them so as to locate axially the two said components relative to each other while allowing them to rotate relative to each other, the setting ring being of a material of substantially different hardness from the material of a said component with which it is in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting ring and at least one of said components.
2. A rotary seal according to claim 1 wherein two said setting rings are provided mutually opposed so as to establish axial location between the two components in mutually opposite directions.
3. A rotary seal for establishing a seal between a shaft and a surrounding member with which the shaft is relatively rotatable, comprising:
an annular outer component which is to be rotatable relative to the shaft;
an annular runner component which is to be secured around the shaft;
a first pair of axially spaced apart sealing members carried by the outer component;
a second pair of axially spaced apart sealing members carried by the runner component one pair of said first and second sealing member pairs being axially located on the said component which carries them; the other pair of said first and second sealing member pairs being axially slidable on the said component which carries them;
spring means acting between said other pair of sealing members and the component carrying said other pair of sealing members to urge said other pair of sealing members into sealing engagement with said one pair of -sealing members, thereby establishing two annular seals with a fluid-containing space between them; and a pair of setting rings engaging axially between said components and rotatable relative to at least one of them so as to locate the two said components relative to each other axially in either direction while allowing them to rotate relative to each other, the setting rings being of a material of substantially different hardness from the material of a said component with which they are in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting rings and at least one of said components.
an annular outer component which is to be rotatable relative to the shaft;
an annular runner component which is to be secured around the shaft;
a first pair of axially spaced apart sealing members carried by the outer component;
a second pair of axially spaced apart sealing members carried by the runner component one pair of said first and second sealing member pairs being axially located on the said component which carries them; the other pair of said first and second sealing member pairs being axially slidable on the said component which carries them;
spring means acting between said other pair of sealing members and the component carrying said other pair of sealing members to urge said other pair of sealing members into sealing engagement with said one pair of -sealing members, thereby establishing two annular seals with a fluid-containing space between them; and a pair of setting rings engaging axially between said components and rotatable relative to at least one of them so as to locate the two said components relative to each other axially in either direction while allowing them to rotate relative to each other, the setting rings being of a material of substantially different hardness from the material of a said component with which they are in rotatable axial engagement, so that after the seal has been running for some time the softer material wears away to provide a clearance between the setting rings and at least one of said components.
4. A rotary seal according to claim 3 wherein the two setting rings are located at opposite axial end regions of the seal axially outwardly of the sealing members.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7903907 | 1979-02-05 | ||
| GB7903907 | 1979-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1134406A true CA1134406A (en) | 1982-10-26 |
Family
ID=10502959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000344835A Expired CA1134406A (en) | 1979-02-05 | 1980-01-31 | Rotary seal unit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4294454A (en) |
| EP (1) | EP0014568B1 (en) |
| AT (1) | ATE2912T1 (en) |
| CA (1) | CA1134406A (en) |
| DE (1) | DE3062489D1 (en) |
| GB (1) | GB2041467B (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4377290A (en) * | 1982-03-22 | 1983-03-22 | John Crane-Houdaille, Inc. | Symmetrical seal package for multiple face seals |
| US4443015A (en) * | 1982-07-14 | 1984-04-17 | Five Star Seal Corporation | Cartridge type rotary shaft seal with bearings and bellows |
| GB2150232B (en) * | 1983-03-31 | 1987-04-23 | Masaaki Nagashima | Underwater bearing protection device |
| US4509561A (en) * | 1983-04-28 | 1985-04-09 | Power Piping Company | Insulation device for application to an uninsulated portion of a preinsulated pipe |
| US4625977A (en) * | 1985-04-30 | 1986-12-02 | A. W. Chesterton Company | Convertible, stand-by rotary seal assembly |
| US4634134A (en) * | 1985-05-08 | 1987-01-06 | Epworth Manufacturing Co., Inc. | Mechanical seal |
| FR2589955B1 (en) * | 1985-11-08 | 1989-12-08 | Sealol | TURBOPUMP SEALING DEVICE |
| FR2603947B1 (en) * | 1986-09-17 | 1990-11-30 | Snecma | DEVICE FOR HOLDING A SEAL ON A SHAFT END AND TURBOMACHINE COMPRISING SAME |
| FI75918C (en) * | 1986-10-08 | 1988-08-08 | Safematic Ltd Oy | Mechanical seals |
| SE467473B (en) * | 1990-03-15 | 1992-07-20 | Goeran Anderberg | AXELTAETNING |
| NO177779C (en) * | 1993-07-06 | 1995-11-22 | Statoil As | Sealing device for a swivel |
| DE19523435C2 (en) * | 1995-06-28 | 1997-07-17 | Ae Goetze Gmbh | Device for sealing a gas duct |
| GB2306595B (en) * | 1995-11-01 | 1999-09-29 | Framo Eng As | High pressure fluid connector |
| US6156167A (en) * | 1997-11-13 | 2000-12-05 | Novellus Systems, Inc. | Clamshell apparatus for electrochemically treating semiconductor wafers |
| AU747433B2 (en) * | 1998-10-21 | 2002-05-16 | Aesseal Australia Pty Ltd | A seal |
| AUPP660598A0 (en) * | 1998-10-21 | 1998-11-12 | Sealing Technology Pty Ltd | A seal |
| DE202004019718U1 (en) * | 2004-12-21 | 2005-03-03 | Burgmann Industries Gmbh & Co. Kg | Assembly of shaft and rotating mechanical seal, especially for refrigerant compressor, has passage for feed of flow medium provided in shaft and opens out into cavity defined by drive collar housing |
| US8033549B2 (en) * | 2006-04-25 | 2011-10-11 | Scenic Precise Element Inc. | Mechanical seal |
| US7823452B2 (en) * | 2007-09-27 | 2010-11-02 | International Business Machines Corporation | Slip ring positive Z force liquid isolation fixture permitting zero net force on workpiece |
| DE102009023741A1 (en) * | 2008-11-13 | 2010-05-20 | Sms Siemag Ag | Rotary union |
| CN103392087B (en) * | 2011-06-30 | 2015-05-27 | 伊格尔工业股份有限公司 | Shaft seal apparatus |
| JP6077339B2 (en) * | 2013-03-05 | 2017-02-08 | 日本ピラー工業株式会社 | Multi-channel rotary joint |
| US9790863B2 (en) | 2013-04-05 | 2017-10-17 | Honeywell International Inc. | Fluid transfer seal assemblies, fluid transfer systems, and methods for transferring process fluid between stationary and rotating components using the same |
| GB201315425D0 (en) * | 2013-08-29 | 2013-10-16 | Agco Int Gmbh | Rotary seal arrangement for a tyre pressurisation system |
| JP6403337B2 (en) * | 2015-04-30 | 2018-10-10 | 日本ピラー工業株式会社 | Rotary joint device |
| DE102017110480B4 (en) * | 2017-05-15 | 2020-12-17 | Schaeffler Technologies AG & Co. KG | Wheel bearings for a motor vehicle |
| BR112020007054A2 (en) * | 2017-10-09 | 2020-10-06 | Deublin Company | multi-pass rotary joint |
| JP2022500848A (en) * | 2018-09-14 | 2022-01-04 | アプライド マテリアルズ インコーポレイテッドApplied Materials, Incorporated | Non-contact rotating union |
| US20200217437A1 (en) * | 2019-01-07 | 2020-07-09 | Deublin Company | Rotary joint |
| CN113404952A (en) * | 2021-05-17 | 2021-09-17 | 浙江海利得新材料股份有限公司 | Novel rotary joint |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931631A (en) * | 1954-10-28 | 1960-04-05 | Pfaudler Co Inc | Mechanical seal assembly and method of operation |
| US2820653A (en) * | 1955-03-09 | 1958-01-21 | Twin Disc Clutch Co | Oil cooled seal |
| US2859054A (en) * | 1955-05-13 | 1958-11-04 | Baldwin Lima Hamilton Corp | Multiple passage overshaft seal |
| DE1770443U (en) * | 1958-05-17 | 1958-07-17 | Goetzewerke | MECHANICAL SEAL. |
| US3122373A (en) * | 1960-07-11 | 1964-02-25 | Consolidation Coal Co | High pressure fluid seals |
| GB989794A (en) * | 1961-03-27 | 1965-04-22 | Central Res Lab Inc | Rotary mechanical seal |
| DE1303565B (en) * | 1967-02-06 | 1972-02-03 | Danfoss As | |
| US3582089A (en) * | 1969-04-14 | 1971-06-01 | Sybron Corp | Package rotating shaft seal assembly |
| FR2094529A5 (en) * | 1970-06-24 | 1972-02-04 | Mecalix | |
| GB1470969A (en) * | 1974-08-28 | 1977-04-21 | Filton Ltd | Rotary sliding contact seals |
-
1980
- 1980-01-30 US US06/117,836 patent/US4294454A/en not_active Expired - Lifetime
- 1980-01-31 AT AT80300288T patent/ATE2912T1/en not_active IP Right Cessation
- 1980-01-31 GB GB8003393A patent/GB2041467B/en not_active Expired
- 1980-01-31 CA CA000344835A patent/CA1134406A/en not_active Expired
- 1980-01-31 EP EP80300288A patent/EP0014568B1/en not_active Expired
- 1980-01-31 DE DE8080300288T patent/DE3062489D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2041467A (en) | 1980-09-10 |
| GB2041467B (en) | 1983-04-13 |
| EP0014568B1 (en) | 1983-03-30 |
| DE3062489D1 (en) | 1983-05-05 |
| EP0014568A1 (en) | 1980-08-20 |
| US4294454A (en) | 1981-10-13 |
| ATE2912T1 (en) | 1983-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |