GB2188992A - Sealing ring - Google Patents
Sealing ring Download PDFInfo
- Publication number
- GB2188992A GB2188992A GB08702435A GB8702435A GB2188992A GB 2188992 A GB2188992 A GB 2188992A GB 08702435 A GB08702435 A GB 08702435A GB 8702435 A GB8702435 A GB 8702435A GB 2188992 A GB2188992 A GB 2188992A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sealing
- sealing ring
- machine element
- body portion
- cylindrical
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
- B21B31/078—Sealing devices
-
- 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
- F16J15/3436—Pressing means
- F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The sealing ring seals a space 20 between first and second machine elements 16, 18 rotatable in relation to each other, the first having a cylindrical sealing surface 24 and the second a sealing surface 26 substantially perpendicular to the axis of the surface 24. The sealing ring consists of an elastomeric material and comprises a body portion 2 forming an inner cylindrical surface 6 for sealingly and immovably engaging the surface 24 of the first machine element. A sealing lip 4 unitary with the body portion 2 sealingly engages the surface 26 and slides against the surface 26 when the machine elements 16, 18 are rotated in relation to each other. <IMAGE>
Description
SPECIFICATION
Sealing ring
The present invention relates to a sealing ring for sealing a clearance space between two machine elements which are rotatable in relation to each other.
In different types of machinery it is necessary to provide sealing arrangements in order to prevent dirt, scale, water and other impurities from entering damageable portions of the machinery, especially the bearing arrangements thereof. Especially in the machinery of the rolling-mill industry the existing sealing arrangements for for example back-up rolls and workrolls are often incapable of maintaining a correct function in view of the arduous running conditions present in such machinery, such as high speed, axial movements, radial deflection, frequent roll changes and rough handling. The result of the incapability of maintaining a correct function of the sealing arrangements is that water and dirt enter the bearing in turn resulting in a high usage of grease or oil.
The object of the present invention is to provide a sealing arrangement in the form of a sealing ring which mitigates the problems and disadvantages of prior art sealing arrangements.
This object is accomplished in accordance with the present invention by a sealing ring for sealing a space between a first machine element and a second machine element, the machine elements being rotatable in relation to each other, the first machine element having adjacent said clearance space a cylindrical sealing surface and the second machine element having adjacent said clearance space a sealing surface extending substantially perpendicular to the axis of the cylindrical sealing surface, the sealing ring consisting of an elastomeric material and comprising a body portion forming an inner cylindrical surface adapting sealingly and immovably to engage the cylindrical surface of the first machine element and further comprising a sealing lip unitary with the body portion and adapted sealingly to engage the sealing surface of the second machine element and to slide against the sealing surface of the second machine element when the machine elements are rotated in relation to each other.
In a preferred embodiment of the sealing ring according to the invention the axial dimension of the body portion is substantially larger than the radial thickness thereof. It is also preferred that the axial length of the body portion is adaptable to the axial dimension of the cylindrical sealing surface of the first machine element, the sealing ring according to the invention thereby eliminates the need for spacer rings.
It is advantageous to provide the body portion of the sealing ring according to the invention with means for clamping the inner cylindrical surface of the body portion against the cylindrical surface of the first machine element, making it possible to maintain a secure fastening of the sealing ring also when the ring is rotated at high speed.
It is suitable to provide the body portion of the sealing ring with at least one drainage opening adapted to drain liquid from a space positioned radially inside the cylindrical sealing surface of the first machine element. Thereby it is preferred to provide the drainage opening with a check valve allowing liquid to escape from said space but preventing liquid from entering the same.
A sealing ring of this kind is efficient also in arduous running conditions and also have many other advantages with regard to its mounting and operation.
The invention is described in the following with reference to the accompanying drawings.
Figure 1 is a axial section of an embodiment of a sealing ring according to the invention.
Figure 2 is an axial section of a portion of a strip mill provided with sealing ring according to Fig. 1.
The sealing ring shown in Fig. 1 consists of elastomeric material, preferably rubber, for example nitrile rubber, and comprises a substantially cylindrical body portion 2 and a lip portion 4 unitary therewith.
The active sealing surfaces of the sealing ring are constituted by an inner cylindrical surface 6 of the body portion 2 and the free end portion 8 of the lip portion 4. Thereby the cylindrical surface 6 is adapted sealingly and immovably to engage a cylindrical sealing surface of a first machine element and the free end portion 8 is adapted to engage a sealing surface of a second machine element and to slide against said sealing surface when the two machine elements are rotated in relation to each other.
The radial thickness of the body portion 2 is small in relation to the axial dimension thereof and this dimensional relationship provides for certain advantages described in connection with Fig. 2.
The body portion 2 is provided with an annular projection 10 forming at its peripheral surface a groove for receiving a strip-shaped clamping element 11.
The body portion 2 is provided with a drainage opening 12 provided with a check valve 14 adapted to allowing liquid to flow through the drainage opening 12 radially outwards but preventing liquid to flow in the opposite direction.
In Fig. 2 there is shown an axial section of a portion of a strip-mill comprising two machine elements 16 and 18 which are rotatable in relation to each other. The machine element 16 as well as the machine element 18 comprise several parts which are not described in detail. The machine elements 16 and 18 are rotatably connected with each other by means of a bearing arrangement (not shown) and in
Fig. 2 there is shown a sealing arrangement preventing water and dirt from reaching said bearing arrangement through the clearance space 20 between the two machine elements.
The sealing arrangement comprises a sealing ring according to the invention and a baffle element 22. Thereby, the sealing ring according to the invention is supported by the machine element 16 while the baffle element 22 is supported by the machine element 18.
When the strip-mill is in operation the machine element 18 is rotating while the machine element 16 is stationary.
The inner cylindrical surface 6 of the sealing ring sealingly and immovably engages a cylindrical sealing surface 24 of the first machine.
element. The surface 6 is clamped against the surface 24 by means of the clamping element
11. The sealing lip 4 engages at its free end portion 8 a sealing surface 26 of the second machine element 18, the surface 26 extending perpendicular to the axis of the cylindrical surface 24. When the machine element 18 is rotating the sealing lip 4 slides against the sealing surface 26 while sealingly closing the space 20 between the two machine elements
16 and 18. The end of the body portion 2 opposite from the sealing lip 4 engages a shoulder 28 of the machine element 16.
Water and dirt unintentionally passing the sealing lip 4 are catched by the baffle element 22 and are thrown into a chamber 30 having a drainage opening 32 at its bottom which is connected with the drainage opening 12 of the sealing ring. The water and dirt are allowed to escape through the check valve 14 while the check valve 14 prevents water and dirt from entering the chamber 30.
The sealing ring according to the invention has several advantages. Thus, the axial length of the body portion 2 can be adjusted to the axial width of the sealing surface 24 so that spacer rings and the like are eliminated. The sealing ring is easy to mount because of the small dimensions of the body portion 2 at the end of the body portion opposite from the lip 4. Said small dimensions of the body portion provide for a reduction of the force initially required to slide the seal onto its sealing surface 24.
The drainage opening 12 does not only provide drainage of water and dirt from the chamber 30 but also eliminates dismounting problems by eliminating suction effects.
The invention can be modified within the scope of the following claims.
Claims (7)
1. A sealing ring for sealing a space between a first machine element and a second machine element, the machine element being rotatable in relation to each other, the first machine element having adjacent said space a cylindrical sealing surface and the second machine element having adjacent said space a sealing surface extending substantially perpendicular to the axis of the cylindrical sealing surface, the sealing ring consisting of an elastomeric material, characterized in that the sealing ring comprises a body portion forming an inner cylindrical surface adapted sealingly and immovably to engage the cylindrical sealing surface of the first machine element and comprising a sealing lip unitary with the body portion and adapted sealing to engage the sealing surface of the second machine- element and to slide against the sealing surface of the second machine element when the machine elements are rotated in relation to each other.
2. A sealing ring as claimed in claim 1, characterized in that the axial dimension of the body portion is substantially larger than the radial thickness thereof.
3. A sealing ring as claimed in claim 1 or 2, characterized in that the axial length of the body portion is adaptable to the axial dimensions of the cylindrical sealing surface of the first machine element.
4. A sealing ring as claimed in any of the preceding claims, characterized in that the body portion is provided with means for clamping the inner cylindrical surface of the body portion against the cylindrical surface of the first machine element.
5. A sealing ring as claimed in any of the preceding claims, characterized in that at least one drainage opening is provided in the body portion, adapted to drain liquid from a space positioned radially inside the cylindrical sealing surface of the first machine element.
6. A sealing ring as claimed in claim 5, characterized in that a check valve is positioned in the drainage opening.
7. A sealing ring substantially as described with reference to, and as shown in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT19632/86A IT1188418B (en) | 1986-03-04 | 1986-03-04 | SEALING RING |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8702435D0 GB8702435D0 (en) | 1987-03-11 |
| GB2188992A true GB2188992A (en) | 1987-10-14 |
| GB2188992B GB2188992B (en) | 1989-11-08 |
Family
ID=11159899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8702435A Expired GB2188992B (en) | 1986-03-04 | 1987-02-04 | Sealing ring |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3705030A1 (en) |
| FR (1) | FR2595428B1 (en) |
| GB (1) | GB2188992B (en) |
| IT (1) | IT1188418B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT391531B (en) * | 1988-12-05 | 1990-10-25 | Waagner Biro Ag | Gap seal for a torsion drive, in particular, in hydraulic steel construction |
| US5316392A (en) * | 1993-10-21 | 1994-05-31 | Morgan Construction Company | Coolant guard for rolling mill oil film bearing assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0153768A1 (en) * | 1984-01-26 | 1985-09-04 | SKF Industrial Trading & Development Co, B.V. | Shaft seal |
| GB2159894A (en) * | 1984-06-04 | 1985-12-11 | Angus And Company Limited Geor | Improvements in rotary shaft seals |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7633220U1 (en) * | 1900-01-01 | Kupfer-Asbest-Co, Gustav Bach, 7100 Heilbronn | ||
| CH419753A (en) * | 1961-11-23 | 1966-08-31 | Forsheda Gummifabrik Aktiebola | Annular mechanical seal and process for its manufacture |
| GB952370A (en) * | 1959-12-07 | 1964-03-18 | Forsheda Gummifabrik Aktiebola | Improvements in or relating to seals between two relatively rotatable parts |
| DE1934436A1 (en) * | 1969-07-07 | 1971-01-21 | Franz Binczyk | Axial mechanical seal |
| DE2244983A1 (en) * | 1972-09-14 | 1974-03-21 | Schorch Gmbh | ELECTRIC MACHINE WITH A SHAFT RUNNING IN ROLLING BEARINGS |
| DE2827556A1 (en) * | 1978-06-23 | 1980-01-03 | Dornier System Gmbh | Resilient lip seal for shaft - has rim bearing on fixed surface and contains dished spring with radiating projections |
| CH638023A5 (en) * | 1979-05-28 | 1983-08-31 | Forsheda Gummifabrik Ab | Sealing ring for sealing off a shaft |
| DE3426805A1 (en) * | 1984-07-20 | 1986-01-23 | INA Wälzlager Schaeffler KG, 8522 Herzogenaurach | SEAL |
| IN166621B (en) * | 1986-01-09 | 1990-06-23 | Warman Int Ltd |
-
1986
- 1986-03-04 IT IT19632/86A patent/IT1188418B/en active
-
1987
- 1987-02-04 GB GB8702435A patent/GB2188992B/en not_active Expired
- 1987-02-17 DE DE19873705030 patent/DE3705030A1/en not_active Withdrawn
- 1987-03-03 FR FR878702866A patent/FR2595428B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0153768A1 (en) * | 1984-01-26 | 1985-09-04 | SKF Industrial Trading & Development Co, B.V. | Shaft seal |
| GB2159894A (en) * | 1984-06-04 | 1985-12-11 | Angus And Company Limited Geor | Improvements in rotary shaft seals |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1188418B (en) | 1988-01-14 |
| FR2595428A1 (en) | 1987-09-11 |
| IT8619632A0 (en) | 1986-03-04 |
| DE3705030A1 (en) | 1987-09-10 |
| GB2188992B (en) | 1989-11-08 |
| IT8619632A1 (en) | 1987-09-04 |
| GB8702435D0 (en) | 1987-03-11 |
| FR2595428B1 (en) | 1991-05-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020204 |