EP0463146A1 - Segment de piston pour machines a pistons alternatifs, principalement les moteurs a combustion interne - Google Patents

Segment de piston pour machines a pistons alternatifs, principalement les moteurs a combustion interne

Info

Publication number
EP0463146A1
EP0463146A1 EP91902732A EP91902732A EP0463146A1 EP 0463146 A1 EP0463146 A1 EP 0463146A1 EP 91902732 A EP91902732 A EP 91902732A EP 91902732 A EP91902732 A EP 91902732A EP 0463146 A1 EP0463146 A1 EP 0463146A1
Authority
EP
European Patent Office
Prior art keywords
ring
piston
elements
built
tapered surfaces
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.)
Withdrawn
Application number
EP91902732A
Other languages
German (de)
English (en)
Inventor
Lászlo WILHEIM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0463146A1 publication Critical patent/EP0463146A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F5/00—Piston rings, e.g. associated with piston crown
    • 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
    • F16J9/20—Rings with special cross-section; Oil-scraping rings
    • 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
    • F16J9/06—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
    • F16J9/062—Coiled spring along the entire circumference

Definitions

  • the invention relates to a piston ring device applicable in piston reciprocating machines, mainly in internal combustion engines.
  • piston reciprocating machines e.g. piston pumps, compressors, working hydraulic or pneumatic cylinders or internal combustion engines
  • stroke reciprocating motion
  • the piston rings used in internal combustion engines fit into ring grooves machined in the outer mantle of the piston. According to their role, they are compression rings or oil retaining rings (scraper rings) .
  • the presently used piston ring devices are made - without exception - as a single split circular ring, mostly of grey cast iron, or alloyed casting.
  • the cross sectional profile of this self-tensioning compression ring is generally flat quadrangle, its outer cylindrical mantle tightly rests on the cylinder wall but its inner cylinder mantle is arranged at a radial gap from the cylindrical wall of the ring groove.
  • the known compression ring generally has 0.02 - 0.03 mm axial gap in the ring groove.
  • the present invention is aimed at elimination of above shorcomings, i.e. at the realization of an improved piston ring device ensuring better sealing between the piston and cylinder for a much longer life than the known solutions.
  • the piston ring device described in the introductory part was used as starting point, machined as a split circular ring which when built in, sits by way of self-tensioning in the piston's ring groove and tightly fits the cylinder wall.
  • the piston ring device according to the invention was further developed by dividing the piston ring device (en ⁇ gaged with the same piston's ring groove), i.e. it consists of at least two separate, self-tensioning split ring elements.
  • each of the tapered surfaces of the ring elements in radial section has an inclined straight or curved constituent, and the ring elements axially form a tight fit with the ring groove.
  • the piston ring device consists of two split ring elements only built in by turning their tapered polished surfaces of the same size opposite each other, and where the gap - created by splitt ⁇ ing the ring elements arranged preferably on the top in the ring groove - is smaller in dismounted state than the one arranged underneath in the ring groove. This further simpli ⁇ fies the manufacture and building in.
  • piston ring device consists of two V-shaped split ring elements, and a third central split ring element load ⁇ ing these elements ourwardly with the surfaces tapered on both sides, where the outer cylindrical mantle of the two external ring elements tightly fit the cylinder wall, and their end-faces rest on the front walls of the ring groove.
  • the piston ring device has a triangular central split ring element the outer cylinder mantle of which tigtly fits the cylinder wall, while its upper and lower tapered surfaces coact with the tapered surfaces of the second and third ring elements by forcing the external ring element radially ourward, furthermore, the end-faces of the second and third ring elements rest on the upper and lower front walls of the ring groove.
  • the two split ring elements are identically shaped and turned opposite each other in built in state, and a prestressed elastic element e.g. an end ⁇ less annular coil spring is built between the opposite tapered surfaces of the ring elements.
  • the two ring elements are axially spaced from each other, or in given case pro ⁇ vided with ducts to clear away the oil. This simiplifies the manufacture and building in.
  • Fig.l Longitudinal section of the piston ring devic according to the invention in built in state;
  • Fig.2 Top view of the lower ring element of the piston ring device according to Fig.l drawn to a smaller scale;
  • Fig.3 Bottom view of the upper ring element of the piston ring device according to Fig.l drawn to a smaller scale;
  • Fig.4 Enlarged section along line IV-IV marked in Fig.2;
  • Fig.5 Enlarged section along line V-V marked in Fig. 3 ;
  • Fig.6 Partial section of the second embodiment of the piston ring device according to the in ⁇ vention given by way of example, in built in state;
  • Fig.7 Sectional view of a further version of the solution according to Fig.6;
  • Fig.8 Sectional view of another embodiment according to the invention given by way of example;
  • Fig.9 View of the solution according to Fig.8 in dismounted state, cut out in part.
  • a piston ring device 1 is arranged in a ring groove 3 of a piston 2 (illustrated only in part and schematically) .
  • the piston 2 makes reciprocating motion in a cylinder 4 of an internal combustion engine, where role of the piston ring dvice 1 is to seal the piston 2 in the cylinder 4.
  • End-face of the piston 2 towards a combustion chamber is marked with 5, its mantle with 6, furthermore, upper and lower end plates of the ring groove 3 with 7 and 8 respectively, and its inter ⁇ nal cylindrical wall with 9.
  • the piston ring device 1 associ ⁇ ated with the ring groove 3 of the piston 2 is divided, i.e. it consists of at least two separate but coacting split ring elements.
  • the piston ring device 1 consists of two, an upper and a lower ring elements 10 and 11, in this case being in direct contact with each other and in connection locked and loaded by force in built in state.
  • the ring elements 10 and 11 are made as split self-tensioning circular rings provided with tapered surfaces 12 and 13, respectively, at their engaging parts.
  • Fig.2-5 The view and section of the ring elements 10 and 11 are shown better in Fig.2-5.
  • Fig.2 and 4 present the lower ring element 11, while Fig.3 and 5 the upper ring element 10.
  • Comparison of Fig.2 and 3 reveals, that a gap 15 formed when splitting the lower ring element 11 was selected much bigger than a gap 14 of the upper ring element 10 in order to facilitate the building in.
  • Partition of the lower ring ele ⁇ ment 11 before building in is shown with dashed line in Fig.l). It is evident that the ring elements 10 and 11 are elastically deformable in the process of building in.
  • Fig.4 and 5 Comparison of Fig.4 and 5 reveals that the ring elements 10 and 11 in this case have the tapered surfaces 12 and 13 of identical cone angle 16, where the constituent in radial section is straight. However, Fig.4 and 5 present a version (marked with dashed line) , where the constituent is curved. But in given case, this constituent may be even other, convex or concave as well.
  • the tapered surfaces 12 and 13 are polished.
  • the end-face of the lower ring element 11 is at a radial spacing 19 from the wall 9 of the ring groove 3 in built in state (Fig.l). As shown in Fig.l, only thermal expansion gap exists between the upper end-face of the lower ring element 11 and the upper end-plate 7 of the ring groove 3, the size of which can be about 1/100 mm.
  • the piston ring device 1 according to Fig.l can be used as compression ring in the internal combustion engines, the production technology and material may be the same as those used at the present time.
  • the cone angle 19 (shown in Fig.4 and 5) may be between 10 grade to 84 grade as required by the existing utilization.
  • Fig.3 and 5 show that dimensions of the upper ring element
  • a mantle surface 20 of the ring element 10 tightly fits an inner wall 21 of the cylinder 4 (Fig.l). Furthermore, an upper end-face 22 of the ring element 10 rests on the upper end plate 7 of the ring groove 3. (The same thermal expansion gap exists between a lower end-face of the ring element 10 and the lower end plate 8 of the ring groove 3 as mentione in connection with the ring element 11) .
  • the present invention is essentially different from the prior art in the respect too, that the ring elements 10 and
  • Fig.6 presents a further embodiment of the piston ring device 1 according to the invention, where the upper ring element 10 and lower ring element 11 in the ring groove 3 are in indirect, i.e. coacting and connection locked and loaded by force through a centrally arranged third split ring element 23.
  • Tapered surfaces 24 and 25 of the ring element 23 are in coaction with the tapered surfaces 12 and 13 of the ring elements 10 and 11, respectively.
  • the ring element 23 presses the ring elements 10 and 11 radially outward and axially apart, so their mantle surfaces 18 and 20 tightly fit the wall 21 of the cylinder 4.
  • the ring element 23 is made similarly as split ring of the same material as that of the other ring elements 10, 11.
  • Fig.7 shows the inverse embodiment of the piston ring de ⁇ vice 1 according to Fig.6.
  • the outer end-face 26 of the central ring element 23 tightly fits the wall 21 of the cylinder 4, while its tapered surfaces 24 and 25 co- act with tapered surfaces 12 and 13 of internally arranged split ring elements 10 and 11.
  • the ring elements 10 and 11 transmit their self-tensioning pressure addi ⁇ tionally loading the ring element 23 radially outward, and the ring elements 10, 11 and 23 fill out axially tightly the ring groove 3.
  • FIG.8 and 9 a further embodiment of the piston ring device 1 according to the invention given by way of example is shown in Fig.8 and 9, that can be used as oil retaining ring de ⁇ vice.
  • This piston ring device l is illustrated in Fig.8 in sectional view and in built in state, while its view (partly cut out) is shown in Fig.9 in dismounted state.
  • This oil re ⁇ taining piston ring device 1 consists of two ring elements (marked also with 10 and 11 for the sake of better perspicuity) .
  • the ring elements 10 and 11 are made as split circular rings, their tapered surfaces 12 and 13 of the same size turned opposite each other. Their splitting gaps are marked also with 14 and 15 (Fig.9).
  • the ring elements 10 and 11 are at axial spacing 27 from each other forming oil outlet gap at the same time.
  • An elastic element 28 is built in between the tapered surfaces 12 and 13 of ring elements 10 and 11, forcing them axially and radially apart.
  • This elastic element 28 in this case is mad as an endless annular pre- stressed coil spring.
  • Fig.8 clearly shows that external mantle surfaces 20, 18 the ring elements 10 and 11 tightly fit the wall 21 of the cylinder 4, and their pressing on is further improved by the elastic element 28.
  • An annular oil space 29 is formed on the middle mantle surface of ring elements 10 and 11 by way of recessing in communication with the gap formed by the spacing 27.
  • the piston ring device 1 according to the invention is originally different from the traditional solutions in respect of its construction and way of functioning. Its main advantage is that at relatively low expenditure, with guaranteed long life it offers reli ⁇ able selaing between the piston 2 and the cylinder 4. Further essential advantage is that it prevents "knockout" of the piston ring device 1 and the piston 2 becoming “stuck", thus saving substantial expenses for the users of the engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Compressor (AREA)

Abstract

Segment de piston pour machines à pistons alternatifs, principalement les moteurs à combustion interne, comportant des bagues à fente disposées par autotensionnage dans une rainure annulaire ménagée dans le piston et pourvu d'une surface cylindrique qui rentre en contact étroit avec la paroi du cylindre. Le segment de piston (1) associé à l'unique rainure annulaire (3) du piston (2) est caractérisé en ce qu'il est divisé et constitué d'au moins deux bagues à fente (10, 11, 23) séparées, intégrées, accouplées et sollicitées directement au niveau de leurs surfaces coniques (12, 13, 24, 25) ou indirectement par une plaque (28) (cale d'épaisseur) supplémentaire qui est précontrainte et principalement élastique, lesdites bagues remplissant la rainure annulaire (3) dans le sens axial et de façon hermétique.
EP91902732A 1990-01-18 1991-01-18 Segment de piston pour machines a pistons alternatifs, principalement les moteurs a combustion interne Withdrawn EP0463146A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU90185A HUT59470A (en) 1990-01-18 1990-01-18 Piston-ring unit for piston reciprocating machines particularly for internal combustion engines
HU18590 1990-01-18

Publications (1)

Publication Number Publication Date
EP0463146A1 true EP0463146A1 (fr) 1992-01-02

Family

ID=10948376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902732A Withdrawn EP0463146A1 (fr) 1990-01-18 1991-01-18 Segment de piston pour machines a pistons alternatifs, principalement les moteurs a combustion interne

Country Status (8)

Country Link
EP (1) EP0463146A1 (fr)
JP (1) JPH04504463A (fr)
KR (1) KR920701647A (fr)
AU (1) AU7057091A (fr)
BR (1) BR9104008A (fr)
CA (1) CA2049320A1 (fr)
HU (1) HUT59470A (fr)
WO (1) WO1991010826A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347915A (en) * 1991-11-06 1994-09-20 Maschinenfabrik Sulzer-Burckhardt Ag Piston compressor for the oilfree compression of gases
US6776419B2 (en) 2002-06-05 2004-08-17 Gregory S. Antoun Seal for a reciprocating plunger
EP3027870B1 (fr) * 2013-08-02 2019-05-15 United Technologies Corporation Dispositif d'étanchéité cunéiforme à structures non rotatives d'un moteur à turbine à gaz
JP6397708B2 (ja) * 2014-09-29 2018-09-26 株式会社クボタ エンジン
JP7275534B2 (ja) * 2018-11-06 2023-05-18 株式会社Ihi シールリング機構

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE835815C (de) * 1949-07-05 1952-04-03 Gertrud Schnuerle Kolbenring fuer Zweitakt-Motoren
DE1101070B (de) * 1958-11-28 1961-03-02 Goetzewerke Dichtungsringsystem, insbesondere zum OElregulieren bei Brennkraftmaschinen-Kolben
US2918340A (en) * 1958-12-19 1959-12-22 Mcquay Norris Mfg Co Piston ring assembly
US3066943A (en) * 1959-12-28 1962-12-04 Perfect Circle Corp Piston ring
US4032159A (en) * 1975-10-28 1977-06-28 Poly Seal, Inc. Interference compression seal
FR2561713B1 (fr) * 1984-03-20 1988-09-09 Pons Jean Eugene Segment d'etancheite notamment pour moteurs a combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9110826A1 *

Also Published As

Publication number Publication date
HU900185D0 (en) 1990-03-28
BR9104008A (pt) 1991-12-10
JPH04504463A (ja) 1992-08-06
WO1991010826A1 (fr) 1991-07-25
HUT59470A (en) 1992-05-28
CA2049320A1 (fr) 1991-07-19
AU7057091A (en) 1991-08-05
KR920701647A (ko) 1992-08-12

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