WO2022152149A1 - Ensemble piston scellé de manière étanche de type labyrinthe - Google Patents

Ensemble piston scellé de manière étanche de type labyrinthe Download PDF

Info

Publication number
WO2022152149A1
WO2022152149A1 PCT/CN2022/071539 CN2022071539W WO2022152149A1 WO 2022152149 A1 WO2022152149 A1 WO 2022152149A1 CN 2022071539 W CN2022071539 W CN 2022071539W WO 2022152149 A1 WO2022152149 A1 WO 2022152149A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
groove
labyrinth
ring
gas ring
Prior art date
Application number
PCT/CN2022/071539
Other languages
English (en)
Chinese (zh)
Inventor
强哲菲
强莉莉
Original Assignee
强莉莉
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 强莉莉 filed Critical 强莉莉
Publication of WO2022152149A1 publication Critical patent/WO2022152149A1/fr

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
    • F02F11/00—Arrangements of sealings in combustion engines 
    • 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
    • F02F3/00—Pistons 

Definitions

  • the present application relates to the technical field of piston seals, in particular to a labyrinth seal piston assembly.
  • Piston, piston gas ring and cylinder liner are important working components of internal combustion engine.
  • the piston and piston gas ring reciprocate in the cylinder liner and convert energy.
  • the lubricating oil continuously enters the combustion chamber and is burned and consumed.
  • Fuel consumption is an important performance indicator of internal combustion engines.
  • the level of oil consumption is directly related to the emission of internal combustion engines and the economy of use. In order to reduce oil consumption, the research and improvement of related parts and components have achieved a lot of results.
  • the piston ring is composed of an air ring and an oil ring.
  • the corresponding piston is provided with a corresponding ring groove, and the air ring mainly seals the engine cylinder.
  • the high-pressure gas inside, and prevent the gas from leaking into the crankcase from the combustion chamber, while the oil ring mainly distributes lubricating oil to the cylinder wall and prevents the lubricating oil from entering the combustion chamber.
  • Technological upgrades promote technological innovations for pistons adapted to them to strengthen gas seals and block lubricating oil from entering the combustion chamber. With the improvement of internal combustion engine emission standards and fuel economy requirements, it is particularly important to reduce and control oil consumption.
  • One of the objectives of the embodiments of the present application is to provide a labyrinth seal piston assembly, which aims to reduce oil consumption.
  • a labyrinth seal piston assembly comprising: a piston body and at least one piston gas ring, the outer circumference of the piston body is provided with a piston gas ring groove matching the size and quantity of the piston gas ring, the The piston air ring is sleeved in the piston air ring groove, a back gap is formed between the inner diameter surface of the piston air ring and the bottom diameter wall of the piston air ring groove, and at least one of the back gaps is arranged to reduce the Labyrinth seal structure for oil leakage and air leakage.
  • the piston air ring includes upper and lower two mounted on the piston body, and a labyrinth seal is installed on the back gap between the inner diameter surface of the piston air ring on the upper side and the bottom diameter wall of the piston air ring groove structure.
  • the piston air ring includes upper and lower two mounted on the piston body, and a labyrinth is installed on the back gap between the inner diameter surface of the two piston air rings and the bottom diameter wall of the piston air ring groove. Sealed structure.
  • the piston air ring includes upper and lower two mounted on the piston body, and a labyrinth seal is installed on the back gap between the inner diameter surface of the piston air ring and the bottom diameter wall of the piston air ring groove on the lower side. structure.
  • the labyrinth sealing structure includes a number of labyrinth grooves connected end to end on the bottom diameter wall of the piston gas ring groove in the axial direction, and a labyrinth flange matched with the labyrinth groove on the inner diameter surface of the piston air ring, so The labyrinth flange is serrated.
  • the labyrinth sealing structure includes a semicircular groove on the bottom diameter wall of the piston gas ring groove along the circumferential direction, a ring groove sealing ring is installed in the semicircular groove, and the inner diameter wall of the piston gas ring corresponds to the The position of the annular groove sealing ring is provided with a first groove, and the first groove is clamped with an end of the annular groove sealing ring away from the semicircular groove.
  • the annular groove sealing ring is made of heat-resistant polymer elastic material, and the annular groove sealing ring is an "O" ring with a circular cross-section.
  • the labyrinth sealing structure includes a second groove opened on the inner diameter wall of the piston gas ring.
  • the labyrinth sealing structure includes a third groove opened on the bottom diameter wall of the piston gas ring groove.
  • the labyrinth sealing structure includes a fourth groove opened on the inner diameter wall of the piston gas ring, a rectangular flange fixedly connected on the bottom diameter wall of the piston gas ring groove, and the rectangular flange is inserted into the fourth groove. in the groove.
  • a labyrinth sealing structure is set between the piston air ring groove and the piston air ring to reduce the passage of lubricating oil and gas through the piston air ring groove and the side gap and back gap of the piston air ring, and reduce the oil consumption and power loss of the internal combustion engine.
  • the rectangular flange in the piston gas ring groove divides the back gap between the piston gas ring groove and the piston gas ring into several parts, the gap between the lubricating oil and the gas flow channel is small, especially the rectangular ring structure of the flange turns The loss of pressure difference is significant, and the leakage of lubricating oil and gas is reduced.
  • a ring groove sealing ring or flange is arranged between the piston gas ring groove and the piston gas ring, which reduces the cross-sectional area of the gas passing through the opening gap, reduces air leakage, and thus reduces power or pressure loss.
  • the labyrinth sealing structure is set on the piston ring groove and the piston gas ring, which improves the sealing ability of the piston and the piston ring to high pressure gas and reduces the pressure loss. pressure.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of the labyrinth seal piston assembly provided by the application;
  • Embodiment 2 is a schematic structural diagram of Embodiment 2 of the labyrinth seal piston assembly provided by the application;
  • Embodiment 3 is a schematic structural diagram of Embodiment 3 of the labyrinth seal piston assembly provided by the application;
  • Embodiment 4 is a schematic structural diagram of Embodiment 4 of the labyrinth seal piston assembly provided by the application;
  • Embodiment 5 is a schematic structural diagram of Embodiment 5 of the labyrinth seal piston assembly provided by the application;
  • Embodiment 6 is a schematic structural diagram of Embodiment 6 of the labyrinth seal piston assembly provided by the application;
  • FIG. 7 is a schematic structural diagram of Embodiment 7 of the labyrinth seal piston assembly provided by the application.
  • Piston body 11. Piston gas ring groove; 2. Piston gas ring; 3. Labyrinth sealing structure; 31. Labyrinth groove; 32. Labyrinth flange; 33. Semicircular groove; 34. Ring groove sealing ring; 35, The first groove; 36, the second groove; 37, the third groove; 38, the fourth groove; 39, the rectangular flange.
  • the labyrinth seal piston assembly provided in this embodiment includes: a piston body 1 and at least one piston gas ring 2 .
  • the outer circumference of the piston body 1 is provided with a size and quantity matching the size and quantity of the piston gas ring 2 along the circumference.
  • a suitable piston air ring groove 11, the piston air ring 2 is sleeved in the piston air ring groove 11, a back gap is formed between the inner diameter surface of the piston air ring 2 and the bottom diameter wall of the piston air ring groove 11, and at least one back gap is installed.
  • a labyrinth sealing structure 3 is provided for reducing air leakage and oil leakage.
  • the piston of an internal combustion engine is one of the main parts in an internal combustion engine. It forms a piston group with parts such as piston rings, cylinder liners, and piston pins, and forms a combustion chamber together with the cylinder head. It is transmitted to the crankshaft to complete the working process of the internal combustion engine.
  • the piston body 1 is a cylinder
  • the piston gas ring 2 is embedded in the piston gas ring groove 11 on the piston body 1, and reciprocates with the piston body 1.
  • the piston gas ring groove 11 and the piston There are side gaps and back gaps between the gas rings 2.
  • a labyrinth seal structure 3 is designed in the back gap between the piston gas ring 2 and the piston gas ring groove 11, which greatly reduces the leakage of lubricating oil and high-pressure gas.
  • a back gap is formed between the inner diameter surface of the piston gas ring 2 and the bottom diameter wall of the piston gas ring groove 11, and a labyrinth sealing structure 3 for reducing air leakage and oil leakage is installed between at least one back gap, that is, if the piston body 1
  • a labyrinth seal structure 3 is designed on the back gap between the piston air ring 2 at the upper end and the piston air ring groove 11;
  • a labyrinth seal structure 3 is designed on the back gap between the upper and lower piston air rings 2 and the piston air ring groove 11;
  • a labyrinth sealing structure 3 is designed on the upper part.
  • the piston air ring 2 includes two upper and lower parts installed on the piston body 1 , and a labyrinth is arranged on the back gap between the inner diameter surface of the piston air ring 2 on the upper side and the bottom diameter wall of the piston air ring groove 11 Sealing structure 3.
  • the piston gas ring 2 (compression ring) on the upper side has the effect of 75%-85% of the sealing gas
  • the piston gas ring 2 (compression ring) on the lower side not only has the effect of 15%-25% of the sealing gas, but also It has the effect of sealing the lubricating oil, and the high-pressure gas is sealed through the first ring and the second ring, so that the sealing effect is better, and the sealing effect of the subsequent piston gas ring gradually decreases, and each additional piston gas ring will Increase a certain amount of friction power consumption, but its sealing effect is limited, so the number of piston gas rings should not be too much, two is the best. As shown in FIG.
  • a labyrinth seal structure 3 is designed on the back gap between the upper piston air ring 2 and the piston air ring groove 11 to reduce the backlash of lubricating oil and gas from the piston air ring groove 11 and the piston air ring 2 back. Through the gap, reduce the oil consumption of the internal combustion engine and reduce the power loss.
  • the labyrinth seal structure 3 includes a plurality of labyrinth grooves 31 connected end to end on the bottom diameter wall of the piston gas ring groove 11 along the axial direction, and the labyrinth grooves 31 formed on the inner diameter surface of the piston air ring 2 and the labyrinth grooves 31 Matching labyrinth flanges 32, the labyrinth flanges 32 are serrated.
  • the labyrinth flange 32 and the labyrinth groove 31 form a labyrinth channel, which can reduce the entry of lubricating oil into the combustion chamber and the entry of combustion chamber gas into the crankcase.
  • the second embodiment of the labyrinth seal piston assembly is basically the same as the piston assembly of Example 1, with the only difference that the piston gas ring 2 includes a piston air ring 2 mounted on the piston body 1 .
  • the next two, the back gap between the inner diameter surface of the two piston gas rings 2 and the bottom diameter wall of the piston gas ring groove 11 are all provided with a labyrinth sealing structure 3 .
  • a labyrinth sealing structure 3 is installed in the two back gaps, which enhances the sealing effect on lubricating oil and gas.
  • the third embodiment of the labyrinth seal piston assembly provided by the present application is basically the same as the piston assembly of Example 1, the only difference being that the piston gas ring 2 includes a piston gas ring 2 mounted on the piston body 1 .
  • a labyrinth sealing structure 3 is installed on the back gap between the inner diameter surface of the piston gas ring 2 on the lower side and the bottom diameter wall of the piston gas ring groove 11 .
  • a labyrinth seal structure 3 is installed on the back gap between the inner diameter surface of the piston gas ring 2 on the lower side and the bottom diameter wall of the piston gas ring groove 11 to form a labyrinth channel, which can reduce the entry of lubricating oil into the combustion chamber and the entry of combustion chamber gas into the crankshaft box.
  • the fourth embodiment of the labyrinth seal piston assembly is basically the same as the piston assembly of Example 2, except that the labyrinth seal structure 3 includes the bottom diameter of the piston gas ring groove 11 .
  • a semicircular groove 33 is provided on the wall along the circumferential direction.
  • a ring groove sealing ring 34 is installed in the semicircular groove 33.
  • a first groove 35 is provided on the inner diameter wall of the piston gas ring 2 at a position corresponding to the ring groove sealing ring 34.
  • a groove 35 is engaged with one end of the annular groove sealing ring 34 away from the semicircular groove 33 .
  • the first groove 35 has a U-shaped structure.
  • the ring groove sealing ring 34 installed in the semicircular groove 33 divides the back gap between the piston body 1 and the piston gas ring 2 into several parts to form a labyrinth channel, which can reduce the entry of lubricating oil into the combustion chamber and the entry of combustion chamber gas Crankcase.
  • the annular groove sealing ring 34 is made of a heat-resistant polymer elastic material, and the annular groove sealing ring 34 is an "O" ring with a circular cross-section.
  • the ring groove sealing ring 34 is resistant to high temperature, preventing the high temperature in the combustion chamber from causing the ring groove sealing ring 34 to fail and reducing the sealing effect.
  • the tightness between the grooves 35 is stronger.
  • the fifth embodiment of the labyrinth seal piston assembly is basically the same as the piston assembly of Example 2, except that the labyrinth seal structure 3 includes the inner diameter wall of the piston gas ring 2 .
  • the second groove 36 is a semicircular structure or a U-shaped structure. The formation of labyrinth channels can reduce the entry of lubricating oil into the combustion chamber and the entry of combustion chamber gas into the crankcase.
  • the sixth embodiment of the labyrinth seal piston assembly is basically the same as the piston assembly of Example 2, except that the labyrinth seal structure 3 includes the bottom diameter of the piston gas ring groove 11 .
  • the third groove 37 opened on the wall.
  • the third groove 37 is a U-shaped structure, and the reason is the same as that in Embodiment 5, and will not be repeated here.
  • the sixth embodiment of the labyrinth seal piston assembly is basically the same as the piston assembly of Example 1, except that the labyrinth seal structure 3 includes the inner diameter wall of the piston gas ring 2 .
  • the opened fourth groove 38 , the rectangular flange 39 fixedly connected to the bottom diameter wall of the piston gas ring groove 11 , and the rectangular flange 39 is inserted into the fourth groove 38 .
  • the fourth groove 38 has a U-shaped structure.
  • the rectangular flange 39 in the piston gas ring groove 11 divides the back gap between the piston body 1 and the piston gas ring 2 into several parts, forming a labyrinth channel, which can reduce the entry of lubricating oil into the combustion chamber and the entry of combustion chamber gas into the crankcase .
  • the rectangular flange 39 turns sharply, and the pressure difference loss is large, which significantly reduces the leakage of lubricating oil and combustion chamber gas.

Landscapes

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

Abstract

La présente invention concerne un ensemble piston scellé de manière étanche de type labyrinthe, comprenant : un corps de piston (1) et au moins un anneau d'air de piston (2). Des rainures d'anneau d'air de piston (11) correspondant à la taille et au nombre des anneaux d'air de piston (2) sont formées sur la périphérie du corps de piston (1) le long de la ligne circonférentielle. Un anneau d'air de piston (2) est emmanché dans une rainure d'anneau d'air de piston (11). Un espace arrière est formé entre une surface de diamètre interne d'un anneau d'air de piston (2) et une paroi de diamètre inférieur d'une rainure d'anneau d'air de piston (11). Une structure de scellement étanche de type labyrinthe (3) pour réduire les fuites d'huile et les fuites d'air est montée entre au moins un espace arrière.
PCT/CN2022/071539 2021-01-15 2022-01-12 Ensemble piston scellé de manière étanche de type labyrinthe WO2022152149A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110056444.7 2021-01-15
CN202110056444.7A CN114763775A (zh) 2021-01-15 2021-01-15 一种迷宫式密封活塞组件

Publications (1)

Publication Number Publication Date
WO2022152149A1 true WO2022152149A1 (fr) 2022-07-21

Family

ID=82364117

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/071539 WO2022152149A1 (fr) 2021-01-15 2022-01-12 Ensemble piston scellé de manière étanche de type labyrinthe

Country Status (2)

Country Link
CN (1) CN114763775A (fr)
WO (1) WO2022152149A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200961533Y (zh) * 2006-10-21 2007-10-17 安徽江淮汽车股份有限公司 一种柴油发动机的活塞环
US20070272078A1 (en) * 2004-02-12 2007-11-29 Kabushiki Kaisha Riken Piston Device for Internal Combustion Engine
CN101551017A (zh) * 2008-10-22 2009-10-07 水山机械(嘉兴)有限公司 用于液压元件的一种新型迷宫密封结构
CN212202398U (zh) * 2020-03-12 2020-12-22 福建东亚机械有限公司 一种带有多角波板撑簧的组合式活塞环组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070272078A1 (en) * 2004-02-12 2007-11-29 Kabushiki Kaisha Riken Piston Device for Internal Combustion Engine
CN200961533Y (zh) * 2006-10-21 2007-10-17 安徽江淮汽车股份有限公司 一种柴油发动机的活塞环
CN101551017A (zh) * 2008-10-22 2009-10-07 水山机械(嘉兴)有限公司 用于液压元件的一种新型迷宫密封结构
CN212202398U (zh) * 2020-03-12 2020-12-22 福建东亚机械有限公司 一种带有多角波板撑簧的组合式活塞环组

Also Published As

Publication number Publication date
CN114763775A (zh) 2022-07-19

Similar Documents

Publication Publication Date Title
CN104220792B (zh) 用于内燃机的活塞环
JP2016527460A (ja) ピストンリング
US10309535B2 (en) Piston ring for an internal combustion engine
US10125869B2 (en) Piston ring for an internal combustion engine
WO2022152149A1 (fr) Ensemble piston scellé de manière étanche de type labyrinthe
CN101560914B (zh) 密封环气悬浮发动机
US20130068188A1 (en) Arrangement in a combustion engine
CN210510257U (zh) 轻量耐磨的双金属组合式活塞环总成及采用其的内燃机
CN101649779B (zh) 悬浮活塞发动机
KR20170055913A (ko) 크로스헤드를 포함하는 대형 2 행정 터보 차징 압축 점화 내연 기관용 상부 피스톤 링
CN207406420U (zh) 一种汽油机活塞环
CN110118132B (zh) 密封组合式活塞环、活塞总成、内燃机及密封方法
GB2104621A (en) Piston ring lubrication
KR20190086204A (ko) 내연기관용 피스톤
CN211287884U (zh) 一种机芯压端的防漏油结构
CN210265827U (zh) 双金属组合式活塞环、活塞总成和内燃机
CN210068335U (zh) 密封组合式活塞环、活塞总成和内燃机
CN202628304U (zh) 一种组合式耐磨活塞环
CN101566097A (zh) 悬浮活塞发动机
WO2009138838A1 (fr) Segment de piston à segment unique et procédé d'étanchéité correspondant
CN205064111U (zh) 一种内燃机用l型组合式活塞环
CN106286002A (zh) 一种内燃机用l型组合式活塞环
CN110145598B (zh) 组合式活塞顶岸环、活塞总成、内燃机及密封方法
CN110118131A (zh) 活塞头
US20130213221A1 (en) Piston ring for an internal combustion engine

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: 22739027

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22739027

Country of ref document: EP

Kind code of ref document: A1