• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a piston made of alloyed perlitic modular cast iron the head of which is supported by a concentric circular fin 2 there is provided a cooling annulus 9 defined by the peripheral portion of the piston head 1 and by the piston skirt 4 in the region of the piston ring grooves. The fin 2 projects from a cross wall 3 which extends perpendicularly to the longitudinal piston axis and forms together with said fin a cooling chamber 8 disposed below the central portion of the piston head while merging into the piston skirt in the region of the piston ring grooves. The cooling chamber is connected, via short, rigid ribs 5, with gudgeon pin bosses 6. The concentric circular fin is provided with at least two apertures 7 constituting communication passages between the cooling chamber 8 and the cooling annulus 9. <IMAGE>
    公开号:SU949215A1
    申请号:SU797770629
    申请日:1979-06-06
    公开日:1982-08-07
    发明作者:Новотны Мирослав
    申请人:Чкд Прага,Оборовы Подник (Инопредприятие)；
    IPC主号:
    专利说明:

    (54) PISTON FROM DURABLE PERLITE PLASTIC IRON FOR INTERNAL COMBUSTION ENGINES
    I
    The invention relates to pig iron from pearlitic ductile iron for internal combustion engines cooled by circulating oil.
    Single cast iron pistons are known in which the bottom of the piston is supported by ribs secured in the boss under the piston pin, which are separated from the piston skirt so that the pressure of the combustion that acts on the piston is not transmitted to the piston skirt. The supporting ribs form the inner wall of the annular cooling chamber, bounded by the bottom contour of the pistons and the skirt 15 of the piston in the place where the piston rings are located. Ets .; the stability of the low temperature of the piston is achieved at the place where the grooves for the piston rings are.
    The disadvantage of this design is that the middle part of the dns piston is not cooled, resulting in a high temperature affecting the stability of the mechanical values of the material 25
    2
    The piston, at the same time, a very uneven temperature distribution occurs. The bottom of the piston, with high temperature gradients between the uncooled and intensively cooled parts of the piston, contribute to high temperature stress, which may lead to material breakdown due to fatigue. In view of the achievement of sufficient rigidity and accuracy of the bore, both lugs under the piston pin, separated from the piston skirt, must be mutually interconnected by relatively thin and high ribs, which, from the point of view of pressure and technology, are unsuitable.
    These deficiencies are eliminated in pistons of doped pearlitic ductile iron cooled by circulating oil. Its essence lies in a volume, a concentric annular rib fixed in a partition perpendicular to the longitudinal axis of the piston. Under the middle part of the piston bottom, this partition forms a chamber together with the concentric Es-ring rib
    3D4
    cooling. The dividing wall passes into the piston skirt at the place where the piston rings are located, and it is connected to the 6o6bmJKa vffl under the piston pin of 13 mm ribs. In the co-centric annular rib there are at least two openings for connecting the cooling chambers with the cooling ring.
    Cooling chamber (under medium
    a part of the piston bottom is connected by holes in the concentric kolydavy rib with a cooling ring bounded by the contour of the piston ring and the piston skirt, which results in more intense cooling of the whole piston. Fir temperature is more uniform, with a lower maximum value. The partition perpendicular to the longitudinal axis of the piston creates the main element of the rigid joint of the piston pin.
    The drawing shows schematically the proposed piston, (on the left half of the drawing there is a longitudinal section of the piston that runs along the axis of the piston pin, on the right half of the drawing there is a longitudinal section of the piston perpendicular to the axis of the piston pin).
    The bottom of the piston 1 is supported by a condensar ring edge 2 fixed in a partition 3, perpendicular to the longitudinal axis of the piston. It goes into the piston skirt 4, where the grooves for the piston rings are located. The partition is connected with bobshisami 6 under the piston pin with rigid ribs. 5. The partition 3 forms a rigid element between the lugs 6 under the piston flange. In the edge of the 2 cash on the opposite; ground holes 7 that connect the cooling chamber 8, formed under the middle part of the piston 1, with the cooling ring 9, the contour of the contour of the piston 1 and the skirt 4
    P 4
    in TOf.1 NiccT-e, where cannons of linear rings are located. In the middle of the ne. there is a hole 1O in which jjoe} CTQJwiona gasket 11 with a nozzle 12, which is blocked. 3 and obospechivayushim ktinimalyn jpos sHb oil 13 cooling chamber 8.
    Cooling the oil through the stench with a piston and a piston pin in a bob} under the piston pin. From here, the oil flows through the bore 13 into the cooling ring of the ring 9 further through the g of the Turn 7 at the end of the 1st annular rib 2 into the cooling chamber 8 and through the nozzle 12 in the gasket 11 flows into the crankcase.
    权利要求:
    Claims (1)
    [1]
    Formula invented and
    A piston made of nepuniTHoro plastic alloy of a decisive combustion, cooled with circulating oil, which is supported by the end of the ring with a circular rib and the cool ring is limited by the piston loop and the piston skirt in the piston: rings, towers and piston rings, and the piston skirt in the arrangement of piston rings, tows and pistons, and a piston skirt in a piston: and with that. KO ni; eiiTpH4Hoe feline edge is fixed in the partition perpendicular to the longitudinal axis of the piston, together with kosh; si6poM. KEUvjepy cooling under the middle section of the 1st section and the transition of the necks into the junction of the piston rings, the partition is connected to the piston pin with thin stiff heels, and in the concentric circular rib there are 1 subgroups for each of the two connecting ends for the plugs. cooling with cooling ring.
    It is recognized as an invention according to the results of the examination carried out by the Office for the Invention of the Czechoslovak Soi. Of the Autonomous Republican Republic. 7 9
    类似技术:
    公开号 | 公开日 | 专利标题
    US4180027A|1979-12-25|Two-piece oil-cooled piston
    US4428330A|1984-01-31|Piston for internal combustion engines
    KR100999229B1|2010-12-07|Cooled piston for an internal combustion engine
    US3221718A|1965-12-07|Piston construction
    US4056044A|1977-11-01|Oil cooled piston
    KR20050057574A|2005-06-16|Multi-part cooled piston for an internal combustion engine
    US4363293A|1982-12-14|Piston for a reciprocating piston machine, particularly an internal combustion engine
    US10871099B2|2020-12-22|Piston cooling for opposed-piston engine
    US4331107A|1982-05-25|Cooling of diesel engine pistons
    US20170009699A1|2017-01-12|Oil-cooled piston for an internal combustion engine
    JPH0617700A|1994-01-25|Cylinder liner with cooling sleeve
    SU949215A1|1982-08-07|Alloyed perlite malleable cast iron piston for internal combustion engine
    US5839352A|1998-11-24|Articulated piston
    US4172435A|1979-10-30|Cooled cylinder for an internal combustion engine
    US6324961B1|2001-12-04|Oil passage arrangement in a piston
    US2560700A|1951-07-17|Cylinder air port construction
    KR850003929A|1985-06-29|Piston
    US5113817A|1992-05-19|Piston with specific land characteristics
    US4253429A|1981-03-03|Piston for internal combustion engines
    US1995746A|1935-03-26|Piston
    SU1283432A1|1987-01-15|Cooled piston for internal combustion engine
    KR930702604A|1993-09-09|Cylinder Liner for Water-Cooled Internal Combustion Engines
    US2829017A|1958-04-01|Piston
    FI80325B|1990-01-31|OLJEKYLD SLAGKOLV FOER EN FOERBRAENNINGSMOTOR.
    US1874446A|1932-08-30|Ported cylinder construction
    同族专利:
    公开号 | 公开日
    CS201273B1|1980-10-31|
    DE2923330A1|1980-01-10|
    FR2429328A1|1980-01-18|
    GB2023764A|1980-01-03|
    DE2923330C2|1986-06-12|
    FR2429328B1|1984-12-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE499189C|1927-04-21|1930-06-05|Gen Electric Co Ltd|Pistons for internal combustion engines|
    US1856107A|1928-04-10|1932-05-03|Gen Electric Co Ltd|Piston for internal combustion engines|
    DE1055879B|1955-03-23|1959-04-23|Schmidt Gmbh Karl|Oil-cooled pistons for diesel engines in vehicles|
    DE1002172B|1955-12-20|1957-02-07|Maschf Augsburg Nuernberg Ag|Cooled light alloy piston|
    DE1526598A1|1966-10-07|1970-02-12|Maschf Augsburg Nuernberg Ag|Device for reducing cylinder liner wear in plunger engines, especially for heavy duty operation|
    US3613521A|1968-11-07|1971-10-19|Komatsu Mfg Co Ltd|Piston for internal combustion engine|
    FR2079873A5|1970-02-16|1971-11-12|Semt|
    FR2127040A5|1971-01-19|1972-10-13|Semt|
    FR2125687A5|1971-02-16|1972-09-29|Semt|
    DE2601295A1|1976-01-15|1977-07-21|Kleinwaechter Hans|Solar energy collector assembly - has plastics collector sleeve between multilayer upper plate and heat insulating bottom plate with adjustable plate spacing|
    CA1084789A|1976-01-23|1980-09-02|Richard L. Hummel|Solar energy collection system|
    US4076025A|1976-11-22|1978-02-28|Parker Louis W|Solar steam boiler|
    FR2395468B1|1977-06-23|1980-06-06|Parica|US4643079A|1985-03-28|1987-02-17|General Motors Corporation|Iron piston having selectively hardened ring groove|
    DE3511852C1|1985-03-30|1987-01-02|Man B & W Diesel Gmbh|Oil-cooled monoblock trunk piston for internal combustion engines|
    GB9909033D0|1999-04-19|1999-06-16|Seneca Tech Ltd|Piston coolant path|
    DE10325917A1|2003-06-07|2005-03-31|Mahle Gmbh|Piston for an internal combustion engine and casting process for its production|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS412278A|CS201273B1|1978-06-22|1978-06-22|Piston from the alloyed perlitic plastic cast iron for the ignition engines|
    [返回顶部]