WO2009104031A2 - Split sealing ring for pistons - Google Patents
Split sealing ring for pistons Download PDFInfo
- Publication number
- WO2009104031A2 WO2009104031A2 PCT/HU2009/000019 HU2009000019W WO2009104031A2 WO 2009104031 A2 WO2009104031 A2 WO 2009104031A2 HU 2009000019 W HU2009000019 W HU 2009000019W WO 2009104031 A2 WO2009104031 A2 WO 2009104031A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- external
- sealing ring
- piston
- split sealing
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
- F16J9/061—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging using metallic coiled or blade springs
- F16J9/063—Strip or wire along the entire circumference
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
-
- 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
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
- F16J9/14—Joint-closures
- F16J9/145—Joint-closures of spring expanders
Definitions
- Subject of the invention is a split sealing ring for pistons, especially for pistons with support insert, which sealing ring structure is placed in the groove of the piston, and includes a flexible steel internal ring and at least one external ring of soft iron, and the internal ring is contacted with the external ring in a conical surface that is angular to the plane of the ring structure.
- the split piston ring consists of a structure formed with its internal diameter and sheet distance for the groove of the piston, with its external diameter for the bore-hole of the cylinder in such a way that the piston consists at least of two parts, and both parts in conical angle, or one part in conical angle and the other part fitted with radius surfaces, or both connecting parts with radius, polished surfaces are placed in the groove of the piston.
- Material of the piston ring consists of materials of traditional composition. The ring, due to its construction, prevents jamming of the piston, but in spite of this, it can not provide sealing during operation perfectly.
- Patent specification WO99/56042 describes a split piston ring, characterised in its material, which consists of two parts: of an internal ring of spring steel material and of an external soft iron ring.
- the two rings meet each other with an inclined plane that includes an acute angle to their common plane, which allows that the spring steel ring presses the soft iron ring to the internal wall of the cylinder in every condition. Due to meeting in an acute angle, forces that effect onto the side wall of the groove that receives the ring, emerging parallel with the direction of the longitudinal axle of the cylinder can easily press the split ring onto the groove.
- a further disadvantage is that the ring can move in the direction of the other size of the groove that is towards the axle of the cylinder, because there a gap to provide some tolerance must be formed in order to avoid seizing.
- the object of the invention is to create - by elimination of the above deficiencies - a sealing ring structure that beside all this does not require any structural modification on the existing pistons and cylinders, and can be manufactured in a cheap way.
- the invention is based on the recognition that the space that provides the mentioned tolerance must be filled by an elastic element in the depth direction of the groove, which will partly centralise the current position of the sealing ring relative to the piston, and partly allows via the provided spring force a possible further division of the sealing ring into three parts, and thereby the complete elimination of blow-out problems.
- the split sealing ring structure according to the introductory paragraph, further comprises a waved ring of flexible material between the radial lower part of the groove of the piston and the internal ring.
- Fig. 1 is a cross section of a part of the piston, which is close to the cylinder and includes a groove, with a split ring according to the invention and a flexible element,
- Fig. 2 is the flexible element according to Fig. 1 in top view as well as in front view and also in side view projected,
- Fig. 3A is the internal member of a split sealing ring in top view
- Fig. 3B is the internal member of a split sealing ring in cross section
- Fig. 4A is one of the external members of the split sealing ring according to the invention in top view
- Fig. 4B is one of the external members of the split sealing ring according to the invention in cross section
- Fig. 5A is the other external member of the split sealing ring according to the invention in top view
- Fig. 5B is the other external member of the split sealing ring according to the invention in cross section.
- Fig.1 is a cross section of a part of the piston 1 , which is close to the cylinder 2 that includes the groove 3 with a split piston ring 4, 5, 6 according to the invention, where the internal ring meets the external ring in the conical surface that is angular to the plane of the ring structure, which is shown on the picture as a skew straight line.
- There are apertures, lightenings 9 are present in that for weight reduction.
- the internal ring 4 made of steel is found, which in the way known from the state of technique, but in a higher angle - approximately in 45 degrees - meets the other member.
- the split ring structure according to the invention allows that the conical surface 14 closes an angle of more than 40 degrees with the plane of the ring structure. Expediently we can choose basically an angle of 45 degrees.
- the external sealing ring is divided into two parts, into a first external ring 5 and into a second external ring 6.
- the dividing fitting surface 7 is perpendicular to the wall of the cylinder 2. Its advantage is that the position of the slots can be rotated relative to each other, thereby the first 5 and the second 6 - A -
- the waved ring 8 is shown in Fig. 2 in top view, projected also its front and side views so that the series of rectangular lightenings 9 that does not reduce springing characteristics but significantly reduces the mass of the waved ring 8.
- the lightenings 9 in the waved ring 8 of spring steel material can be created expediently by pressing.
- Geometric configuration of the waved ring 8 allows to expand its effective internal diameter to some extent, which is necessary for its placement into the groove 3.
- the internal ring 4 in Fig. 4A and 4B the first externaljing 5, and in Fig. 5A and 5B the second external ring 6 are shown, all in top view and in cross section, respectively.
- the internal ring 4 as we mentioned, is of steel and works as a spring that provides a force directed outwards, which presses the external member - which expediently consists of two parts - of the split sealing ring structure to the wall of the cylinder. It includes a slot 13, which can also be relatively bigger.
- the first 5 and second 6 external rings expediently are of identical material, soft iron or similar material that provides similar sealing and bears even higher wear.
- Fitting surface 7 of the internal 4, as well as first 5 and second 6 external rings according to Fig. 1 expediently is polished, of matching smooth design as much as possible.
- the conical surface 14, in which the first 5 and the second 6 external rings meet the internal ring 4 can close with the plane of the rings a larger angle than in case of the sealing rings that are known from the state of technique. Its reason is that the additionally applied waved ring 8 plays not only the role of exacting but increases the pressure of the complex structure towards the cylinder wall. Increase of the angle of the mentioned conical surface 14, however, decreases the possibility of jamming of the ring structure into the groove, thereby it increases operational safety of the machines with pistons.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Sealing Devices (AREA)
Abstract
The invention is a split sealing ring structure for pistons, which is placed in the groove of a piston, and includes a flexible steel internal ring as well as at least one external ring of soft iron material, and the internal ring meets the external ring in a conical surface that is angular to the plane of the ring structure, which includes a waved ring (8) of flexible material between the lower part of the piston (1) of the groove (3) in radial direction and the internal ring (4).
Description
SPLIT SEALING RING FOR PISTONS
Subject of the invention is a split sealing ring for pistons, especially for pistons with support insert, which sealing ring structure is placed in the groove of the piston, and includes a flexible steel internal ring and at least one external ring of soft iron, and the internal ring is contacted with the external ring in a conical surface that is angular to the plane of the ring structure.
It is known from the state of art, that in internal-combustion engines and in compressors, there are compression ring or oil-scraper ring is used in the cylinder; these are circular rings made of split plane, generally of steel or alloyed material, basically of grey iron casting. It is known from practice that operational efficiency of piston rings depends on thermal expansion. Thus the known and commonly used piston rings, less follow size changes that are desirable according to their thermal expansion, and are not perfect in respect of dilatation. Therefore efficiency, fuel consumption of the engine are unfavourable, and the rings often seize or get stuck in the cylinder, especially at higher temperatures, or are knocked out from the groove, do not perform their tasks of gap filling. They do not seal the oil but instead let it through, bring the lubricating oil into the combustion space.
Hungarian patent document published under no. 185/90 describes a split piston ring for any piston systems. In this solution the split piston ring consists of a structure formed with its internal diameter and sheet distance for the groove of the piston, with its external diameter for the bore-hole of the cylinder in such a way that the piston consists at least of two parts, and both parts in conical angle, or one part in conical angle and the other part fitted with radius surfaces, or both connecting parts with radius, polished surfaces are placed in the groove of the piston. Material of the piston ring consists of materials of traditional composition. The ring, due to its construction, prevents jamming of the piston, but in spite of this, it can not provide sealing during operation perfectly.
Patent specification WO99/56042 describes a split piston ring, characterised in its material, which consists of two parts: of an internal ring of spring steel material and of an external soft iron ring. The two rings meet each other with an inclined plane that includes an acute angle to their common plane, which allows
that the spring steel ring presses the soft iron ring to the internal wall of the cylinder in every condition. Due to meeting in an acute angle, forces that effect onto the side wall of the groove that receives the ring, emerging parallel with the direction of the longitudinal axle of the cylinder can easily press the split ring onto the groove. A further disadvantage is that the ring can move in the direction of the other size of the groove that is towards the axle of the cylinder, because there a gap to provide some tolerance must be formed in order to avoid seizing. This, however, allows a smaller displacement of the piston from the ideal central position within the cylinder. This displacement also allows that the piston moves so that its lower and upper parts get to different distances from the wall of the cylinder, and thus take an angular position. This is disadvantageous anyhow both for operation and for wearing characteristics.
A further problem may emerge with the described split sealing ring, where the first sealing ring that falls towards the combustion space - the so-called fire ring - because of the slot on it allows a smaller gas transmission - blow-out -, because the steal ring does not reach the wall of the cylinder in radial direction. However, slotting is essentially required for both ring members, thus the mentioned can not be solved in a simple way.
The object of the invention is to create - by elimination of the above deficiencies - a sealing ring structure that beside all this does not require any structural modification on the existing pistons and cylinders, and can be manufactured in a cheap way.
The invention is based on the recognition that the space that provides the mentioned tolerance must be filled by an elastic element in the depth direction of the groove, which will partly centralise the current position of the sealing ring relative to the piston, and partly allows via the provided spring force a possible further division of the sealing ring into three parts, and thereby the complete elimination of blow-out problems.
In general aspect of the invention, the split sealing ring structure according to the introductory paragraph, further comprises a waved ring of flexible material between the radial lower part of the groove of the piston and the internal ring.
The invention will be further presented by drawings, where:
Fig. 1 is a cross section of a part of the piston, which is close to the cylinder and includes a groove, with a split ring according to the invention and a flexible element,
Fig. 2 is the flexible element according to Fig. 1 in top view as well as in front view and also in side view projected,
Fig. 3A is the internal member of a split sealing ring in top view,
Fig. 3B is the internal member of a split sealing ring in cross section,
Fig. 4A is one of the external members of the split sealing ring according to the invention in top view,
Fig. 4B is one of the external members of the split sealing ring according to the invention in cross section,
Fig. 5A is the other external member of the split sealing ring according to the invention in top view, and
Fig. 5B is the other external member of the split sealing ring according to the invention in cross section.
Fig.1 is a cross section of a part of the piston 1 , which is close to the cylinder 2 that includes the groove 3 with a split piston ring 4, 5, 6 according to the invention, where the internal ring meets the external ring in the conical surface that is angular to the plane of the ring structure, which is shown on the picture as a skew straight line. On the lower bottom part of the groove 3 of the piston 1 in radial direction there is a flexible element, where this latter is accomplished in the form of a waved ring 8. There are apertures, lightenings 9 are present in that for weight reduction. In the groove 3, after the waved ring 8, moving in depth direction outwards, the internal ring 4 made of steel is found, which in the way known from the state of technique, but in a higher angle - approximately in 45 degrees - meets the other member. Generally it can be said that the split ring structure according to the invention allows that the conical surface 14 closes an angle of more than 40 degrees with the plane of the ring structure. Expediently we can choose basically an angle of 45 degrees. The external sealing ring is divided into two parts, into a first external ring 5 and into a second external ring 6. The dividing fitting surface 7 is perpendicular to the wall of the cylinder 2. Its advantage is that the position of the slots can be rotated relative to each other, thereby the first 5 and the second 6
- A -
external rings provide a circular hermetic closing in the slot 10 between the piston 1 and the cylinder 2.
The waved ring 8 is shown in Fig. 2 in top view, projected also its front and side views so that the series of rectangular lightenings 9 that does not reduce springing characteristics but significantly reduces the mass of the waved ring 8. The lightenings 9 in the waved ring 8 of spring steel material can be created expediently by pressing. Geometric configuration of the waved ring 8 allows to expand its effective internal diameter to some extent, which is necessary for its placement into the groove 3.
In Fig. 3A and 3B the internal ring 4, in Fig. 4A and 4B the first externaljing 5, and in Fig. 5A and 5B the second external ring 6 are shown, all in top view and in cross section, respectively. The internal ring 4, as we mentioned, is of steel and works as a spring that provides a force directed outwards, which presses the external member - which expediently consists of two parts - of the split sealing ring structure to the wall of the cylinder. It includes a slot 13, which can also be relatively bigger. The first 5 and second 6 external rings expediently are of identical material, soft iron or similar material that provides similar sealing and bears even higher wear. This does not crape the internal wall of the cylinder, thereby increases the lifetime of the machines with pistons without cylinder reboring. Although on the drawings the slots 11 and 12 of the first 5 and second 6 external rings are standing in the same direction, these mounted are rotated relative to each other, thereby due to overlapping they result in hermetic closing around along the cylinder wall. This is advantageous especially in case of the fire ring.
Fitting surface 7 of the internal 4, as well as first 5 and second 6 external rings according to Fig. 1 expediently is polished, of matching smooth design as much as possible. Moreover the conical surface 14, in which the first 5 and the second 6 external rings meet the internal ring 4, can close with the plane of the rings a larger angle than in case of the sealing rings that are known from the state of technique. Its reason is that the additionally applied waved ring 8 plays not only the role of exacting but increases the pressure of the complex structure towards the cylinder wall. Increase of the angle of the mentioned conical surface 14, however, decreases the possibility of jamming of the ring structure into the groove, thereby it increases operational safety of the machines with pistons.
Claims
1. Split sealing ring structure for use with pistons, which is placed in a groove of a piston, and comprising a flexible steel internal ring as well as at least one external ring of soft iron material, and the internal ring meets the external ring in a conical surface that is angular to the plane of the ring structure, characterised in that it further comprises a waved ring (8) of flexible material between the radial lower part of the groove (3) of the piston (1) and the internal ring (4).
2. Split sealing ring structure according to claim 1 , characterised in that the waved ring (8) is made of spring steel shaped in circular form.
3. Split sealing ring structure according to claim 1 or 2, characterised in that the waved ring (8) comprises apertures as lightenings (9).
4. Split sealing ring structure according to claims 1-3, characterised in that the external ring is formed of a first external ring (5) that has a slot (11) and a second external ring (6) that has a slot (12), where they meet a fitting surface (7) that is parallel with the plane of the ring so that the slots (11 , 12) are not overlapped.
5. Split sealing ring structure according to claims 1-4, characterised in that the conical surface (14) closes an angle of more than 40 degrees with the plane of the ring structure.
6. Split sealing ring structure according to claims 5-4, characterised in that the conical surface (14) closes basically an angle of 45 degrees with the plane of the ring structure.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HUP0800109 | 2008-02-19 | ||
HU0800109A HU228167B1 (en) | 2008-02-19 | 2008-02-19 | Split sealing ring for pistons |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009104031A2 true WO2009104031A2 (en) | 2009-08-27 |
WO2009104031A3 WO2009104031A3 (en) | 2009-12-03 |
Family
ID=89988084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/HU2009/000019 WO2009104031A2 (en) | 2008-02-19 | 2009-02-19 | Split sealing ring for pistons |
Country Status (2)
Country | Link |
---|---|
HU (1) | HU228167B1 (en) |
WO (1) | WO2009104031A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105697338A (en) * | 2016-04-01 | 2016-06-22 | 奉化市鼎联汽车空压机厂 | Novel built-in oil expelling prevention piston structure |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1564095A (en) * | 1924-08-04 | 1925-12-01 | Edward S Moberley | Piston ring |
US1689608A (en) * | 1926-03-20 | 1928-10-30 | Williams John | Piston ring and process of making same |
US1698988A (en) * | 1929-01-15 | Piston king | ||
US1911736A (en) * | 1933-05-30 | Piston ring | ||
US1916659A (en) * | 1932-05-09 | 1933-07-04 | Dodge John Maynard | Sealing ring |
WO1999056042A1 (en) * | 1996-06-04 | 1999-11-04 | Wilheim Laszlo | Split sealing ring characterized by its material serving for any piston system |
-
2008
- 2008-02-19 HU HU0800109A patent/HU228167B1/en not_active IP Right Cessation
-
2009
- 2009-02-19 WO PCT/HU2009/000019 patent/WO2009104031A2/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1698988A (en) * | 1929-01-15 | Piston king | ||
US1911736A (en) * | 1933-05-30 | Piston ring | ||
US1564095A (en) * | 1924-08-04 | 1925-12-01 | Edward S Moberley | Piston ring |
US1689608A (en) * | 1926-03-20 | 1928-10-30 | Williams John | Piston ring and process of making same |
US1916659A (en) * | 1932-05-09 | 1933-07-04 | Dodge John Maynard | Sealing ring |
WO1999056042A1 (en) * | 1996-06-04 | 1999-11-04 | Wilheim Laszlo | Split sealing ring characterized by its material serving for any piston system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105697338A (en) * | 2016-04-01 | 2016-06-22 | 奉化市鼎联汽车空压机厂 | Novel built-in oil expelling prevention piston structure |
Also Published As
Publication number | Publication date |
---|---|
HU0800109D0 (en) | 2008-04-28 |
HU228167B1 (en) | 2013-01-28 |
HUP0800109A2 (en) | 2009-10-28 |
WO2009104031A3 (en) | 2009-12-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4274372A (en) | Lightweight piston for internal combustion engines | |
US9933071B2 (en) | Seal and method of manufacturing and/or using same | |
CN102362106B (en) | Compression piston ring | |
EP3665405B1 (en) | Piston sealing ring assembly having a gap cover element | |
US6378872B1 (en) | Seal assembly | |
KR102051162B1 (en) | Piston ring for an internal combustion engine | |
US7975601B2 (en) | Engine cylinder liner | |
KR101968490B1 (en) | Piston ring for an internal combustion engine | |
EP3115654B1 (en) | Piston ring configured to reduce friction | |
WO2009104031A2 (en) | Split sealing ring for pistons | |
EP3043054A1 (en) | Cuff-ring for a cylinder liner | |
US9334959B2 (en) | Radially notched piston rings | |
US20110266753A1 (en) | Sealing sleeve | |
EP2815116B1 (en) | Piston ring for an internal combustion engine | |
US10385970B2 (en) | Bearing interface with recesses to reduce friction | |
JP4889975B2 (en) | Piston device | |
US11313467B1 (en) | Piston ring seals | |
KR20190106737A (en) | Piston assembly of an internal combustion engine | |
KR102429575B1 (en) | Piston | |
JP6308192B2 (en) | Reciprocating engine | |
KR20170027063A (en) | A piston ring turning structure | |
KR101766181B1 (en) | A piston ring turning structure | |
RU34673U1 (en) | PISTON SEAL | |
WO2004038207A1 (en) | Gap-sealed piston ring, gap-sealed ring-reduction piston engine and ring-reduction reciprocating mechanism | |
CN100445544C (en) | Piston with pressure-reducing piston ring |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09712617 Country of ref document: EP Kind code of ref document: A2 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009712617 Country of ref document: EP |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09712617 Country of ref document: EP Kind code of ref document: A2 |