WO2009003350A1 - Tête de cylindre de moteur diesel à refroidissement par circulation d'air - Google Patents

Tête de cylindre de moteur diesel à refroidissement par circulation d'air Download PDF

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Publication number
WO2009003350A1
WO2009003350A1 PCT/CN2008/000654 CN2008000654W WO2009003350A1 WO 2009003350 A1 WO2009003350 A1 WO 2009003350A1 CN 2008000654 W CN2008000654 W CN 2008000654W WO 2009003350 A1 WO2009003350 A1 WO 2009003350A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling air
cylinder head
air
wall
diesel engine
Prior art date
Application number
PCT/CN2008/000654
Other languages
English (en)
Chinese (zh)
Inventor
Henglin Xiao
Original Assignee
Wuxi Kipor Power Co., Ltd
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 Wuxi Kipor Power Co., Ltd filed Critical Wuxi Kipor Power Co., Ltd
Publication of WO2009003350A1 publication Critical patent/WO2009003350A1/fr

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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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • F02F1/30—Finned cylinder heads
    • F02F1/34—Finned cylinder heads with means for directing or distributing cooling medium 

Definitions

  • the invention belongs to a diesel engine gas cap, in particular to a cylinder head of an air-cooled diesel engine, belonging to a reciprocating internal combustion system.
  • Air-cooled diesel engines are widely used in small power generation systems, and good heat dissipation performance is important for their safe and reliable operation.
  • the air cooling system uses a high-speed air stream to directly blow the outer surface of the gas cap and the gas rainbow body, and transfers the heat from the inside of the cylinder to the atmosphere to ensure that the engine works in the most favorable temperature range.
  • the engine cylinder and cylinder head are made of aluminum alloy with good heat transfer.
  • each cylinder is generally manufactured separately.
  • a plurality of evenly arranged fins are distributed on the surface of the cylinder and the cylinder head to increase the heat dissipation area.
  • the air flow produced in different ways blows the heat away into the atmosphere.
  • the air-cooled diesel engine uses a multi-flow axial fan with a large power flow to forcibly cool the engine.
  • a shroud is generally provided on the air-cooled engine.
  • the air cooling system is simpler than the water cooling system, it has the advantages of simple structure, light weight, less failure, no special maintenance, and the like, but there are disadvantages such as insufficient cooling.
  • the fins of the air-cooled diesel engine gas caps are mostly arranged in an open manner, and the gas flow process is susceptible to the surrounding environment, and the heat dissipation effect on the gas bridge cover nose region is not ideal.
  • the invention content is mostly arranged in an open manner, and the gas flow process is susceptible to the surrounding environment, and the heat dissipation effect on the gas bridge cover nose region is not ideal.
  • the invention discloses an air-cooled diesel engine cylinder head.
  • the gas cylinder cover is closed, that is, the air inlet and the air outlet of the cooling air are respectively guided by the air guiding hood to flow in a specified direction.
  • Wenshan has a heat-dissipating effect on the high temperature part of the nose bridge.
  • the technical solution of the invention is: an air-cooled diesel engine cylinder head integrally casted, and an air inlet, an exhaust passage, an intake valve conduit hole, an exhaust valve conduit hole, and an injector are constructed in the cylinder head Mounting holes, nose bridge area and pusher chamber.
  • An upper cooling air inlet, an inlet wall and a cylinder are arranged between the inlet wall and the left pusher wall
  • a lower cooling air inlet is arranged between the side walls of the cover, an upper cooling air outlet is arranged between the exhaust wall and the right push rod wall, and a lower cooling air outlet is arranged between the exhaust wall and the side wall of the cylinder head.
  • An upper cooling air passage is formed between the cooling air inlet and the outlet, and a lower cooling air passage is formed between the lower cooling air inlet and the outlet, and the lower cooling air inlet to the upper cooling air outlet forms a third air passage, and the cooling air passages communicate with each other.
  • the nose bridge area is located in the third air passage in the middle of the cylinder head, the injector mounting hole is located on the side of the nose beam area facing the downward cooling air passage, and a set of guiding pieces is provided from the lower cooling air duct inward of the lower cooling air inlet.
  • the sheet directs a portion of the cooling air to the injector and nose bridge region, exiting from the upper cooling air outlet, and the remaining portion of the cooling air is discharged from the lower cooling air outlet.
  • the lower cooling air outlet is arranged such that the outlet section is controlled to a certain size to form a throttling effect, a portion of the cooling air that is forced into the passage is turned, and the injector and the nose bridge area are blown to focus cooling.
  • the upper cooling air duct is respectively provided with a guide piece for guiding the cooling airflow into and out, and the cooling air passing through the air passage is led to a region near the center of the cylinder head (the temperature is high due to the intense heating of the gas), and the cooling is performed. .
  • the two ends of each of the guiding pieces are vertically supported on the fire surface of the gas rainbow cover and the top surface of the gas rainbow cover to form a "work" shaped cross-sectional structure.
  • the cylinder head is a closed cylinder head, and the meaning thereof is: an air inlet hood is arranged on the air inlet side of the cylinder head, and the cooling air pressurized by the cooling fan is condensed according to a set ratio, specifically for the cylinder head Cooling is performed; an air hood is installed on the air outlet side of the cylinder head, and the cooling air guided away from the gas cap is cooled to the high temperature surface of the exhaust muffler.
  • the air outlet hood is fitted with another centrally-opened casing part to form a cavity with a cooling air outlet, the cavity containing the exhaust muffler and a ventilation gap therebetween, so that the muffler row
  • the air port and the cooling air outlet are coaxial with each other to form a "back" type structure, and the hot cooling air and the high temperature combustion exhaust gas are discharged in the same direction.
  • the air inlet hood forced the cooling air to approach the surface of the cylinder head that needs to be cooled, enhancing the convective heat transfer strength.
  • the cooling effect is perfected.
  • the cavity formed by the air hood and the other part of the casing becomes a soundproofing chamber, forcing the cooling air discharged from the gas cap to be blown to the air muffler disposed in the soundproofing room, and then these have been
  • the heated cooling air is discharged in the same direction as the high-temperature combustion exhaust gas.
  • Such a design makes the final discharge of the hot gas flow limited to the space passage with a small flow cross section and a certain direction, which reduces the risk of the person being burned by the high temperature gas, and the sound insulation chamber can shield part of the noise and is effective. Reduce the risk of burns to people.
  • the guide piece is used to stabilize the flow direction of the cooling air, and the swirling phenomenon of the cooling air in the open cylinder head due to the disorder of the flow direction is avoided.
  • the guide piece guides the cooling air more toward the injector and the nose bridge area, which effectively reduces the temperature in this area and ensures stable operation of the engine.
  • Each guide piece is vertically supported between the fire surface of the gas cover and the top surface of the cylinder head to form a "work" type cross-section structure, which can increase the rigidity of the cylinder head and increase the natural frequency, which is beneficial to the reduction.
  • the deformation of the cylinder head caused by the bursting pressure in the cylinder is beneficial to reduce noise.
  • Figure 1 is a schematic cross-sectional view of the cylinder head of an air-cooled diesel engine.
  • Figure 1 is a schematic diagram of the flow path of the cooling air of the gas cap.
  • Fig. 3 is a schematic view showing the I-shaped cross-sectional structure formed on the upper surface of the guide piece and the gas rainbow cover.
  • the figure shows: intake port 1, exhaust duct 2, left push rod chamber 3, right push rod chamber 4, nose bridge region 5, injector mounting hole 6, guide piece 7a, guide piece 7b, guide piece 7c, Upper cooling air inlet 8, upper cooling air outlet 9, lower cooling air inlet 10, lower cooling outlet 11, cylinder head side wall 12, intake valve duct hole 13, exhaust valve duct hole 14, air inlet hood 15, The air hood 16 , the casing 17 , the exhaust muffler 18 , and the sound insulation chamber 19 . V. Specific implementation methods
  • Example 1 Air-cooled diesel engine gas cap, which is formed by integral casting.
  • An upper cooling air inlet 8 is disposed between the wall of the intake passage 1 and the wall of the left push rod chamber 3, and an upper cooling air outlet 9 is provided between the wall of the exhaust passage 2 and the wall of the right push rod chamber 4, and the wall of the inlet passage 1 is
  • a lower cooling air inlet 10 is disposed between the sidewalls 12 of the gas siphon cover, and a lower cooling air outlet 11 is disposed between the wall of the exhaust passage 2 and the side wall 12 of the gas siphon cover, and the cooling air outlets communicate with each other, and the nose beam region 5 is located at the intake valve Between the conduit hole 13 and the exhaust valve conduit hole 14, the injector mounting hole 6 is located on the side of the nose bridge region 5 which is biased downward to the cooling duct.
  • a guide piece 7a is provided at a turn of the air passage of the lower cooling air inlet 10 cylinder head, and a part of the cooling air passing through the air passage is led to an injector (not shown) installed in the injector mounting hole 6 and The nose bridge region 5 is then discharged from the upper cooling air outlet 9, and a portion of the remaining cooling air is discharged from the lower cooling air outlet 1 1 .
  • the lower cooling air outlet 11 is arranged such that the outlet flow cross section is controlled to a certain area to form a throttling effect, and a part of the cooling air is forced to be discharged from the upper cooling air outlet 9 to reach the blowing nose bridge area 5 for focusing cooling thereof. purpose.
  • the air duct entering the cylinder head from the upper cooling air inlet 8 is provided with a guide piece 7b near the left push rod chamber 3, and the guide piece 7b guides the cooling air passing through the air passage to the area near the center of the cylinder head (the gas is affected by the gas)
  • the heating is intense and the temperature is high, and then guided from the upper cooling air outlet 9 by the guide piece 7c.
  • the guiding pieces 7a, 7b and 7c are vertically supported between the gas-fired cover surface and the top surface of the gas-capped cover to form a "work"-shaped cross-sectional structure.
  • the so-called closed cylinder head has the meaning that: the air inlet hood 15 is installed on the air inlet side of the cylinder head, and the cooling air pressurized by the cooling fan is condensed according to the set ratio, and the cylinder head is cooled.
  • An air outlet hood 16 is arranged on the air outlet side of the cylinder head, and the air outlet hood 16 is fitted into the casing 17 of the other central opening to form a soundproofing chamber 19 with a cooling air outlet.
  • the heat insulation chamber 19 contains the exhaust muffler 18 therein and a ventilation gap is left between them.
  • the outlet directions of the two are the same, forming a "back" shape structure, so that the heated cooling air and the high temperature combustion exhaust gas are formed. Discharge in the same direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une tête de cylindre d'un moteur diesel à refroidissement par circulation d'air, comprenant un passage (1) d'admission, un passage (2) d'échappement, une zone (5) de pont, un orifice (6) de montage d'injecteur et des feuilles de guidage (7a, 7b, 7c). Un orifice supérieur (8) d'admission d'air de refroidissement est situé entre la paroi du passage (1) d'admission et la paroi de la chambre gauche (3) de la tige de poussée. Un orifice inférieur (10) d'admission d'air de refroidissement est situé entre la paroi du passage (1) d'admission et la paroi latérale (12) de la tête de cylindre. Un orifice supérieur (9) d'échappement d'air de refroidissement est situé entre la paroi du passage (2) d'échappement et la paroi de la chambre droite (4) de la tige de poussée. Un orifice inférieur (11) d'échappement d'air de refroidissement est situé entre la paroi du passage (2) d'échappement et la paroi latérale (12) de la tête de cylindre. La partie d'admission d'air de refroidissement de la tête de cylindre est pourvue d'un dispositif de recouvrement (16) de guidage de l'air d'échappement, formant ainsi une tête de cylindre hermétiquement fermée. La tête de cylindre du moteur diesel de refroidissement par circulation d'air garantit le fonctionnement stable du moteur, et réduit le bruit.
PCT/CN2008/000654 2007-06-29 2008-04-01 Tête de cylindre de moteur diesel à refroidissement par circulation d'air WO2009003350A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2007100247771A CN101082311A (zh) 2007-06-29 2007-06-29 一种风冷柴油机的气缸盖
CN200710024777.1 2007-06-29

Publications (1)

Publication Number Publication Date
WO2009003350A1 true WO2009003350A1 (fr) 2009-01-08

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ID=38912051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/000654 WO2009003350A1 (fr) 2007-06-29 2008-04-01 Tête de cylindre de moteur diesel à refroidissement par circulation d'air

Country Status (2)

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CN (1) CN101082311A (fr)
WO (1) WO2009003350A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113294261A (zh) * 2021-06-29 2021-08-24 潍柴动力股份有限公司 缸盖、涂层制备装置及涂层制备方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101082311A (zh) * 2007-06-29 2007-12-05 无锡开普动力有限公司 一种风冷柴油机的气缸盖
CN101818701B (zh) * 2010-04-26 2015-05-27 隆鑫通用动力股份有限公司 风冷柴油机汽缸头气门布置结构
CN101936237A (zh) * 2010-09-02 2011-01-05 江门市大长江集团有限公司 一种发动机气缸头
CN101943076B (zh) * 2010-10-19 2011-12-28 无锡开普动力有限公司 发动机的气缸盖冷却结构
CN102400811B (zh) * 2011-12-19 2013-03-20 力帆实业(集团)股份有限公司 三气门发动机气缸头
CN104975928A (zh) * 2015-06-28 2015-10-14 金坛鑫田柴油机有限公司 单缸立式风冷柴油机的分流立体冷却装置
CN104975927A (zh) * 2015-06-28 2015-10-14 金坛鑫田柴油机有限公司 高可靠低机温节能环保型立式风冷柴油机
CN104975977B (zh) * 2015-06-28 2022-11-11 江苏鑫田柴油机有限公司 一种均温强化散热型风冷柴油机气缸盖
CN109252949B (zh) * 2018-11-07 2024-03-15 河南柴油机重工有限责任公司 一种v型柴油机消声器的布置结构
CN111075589B (zh) * 2019-12-30 2021-03-30 重庆品恒动力机械有限公司 强制风冷柴油机机体

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH08232654A (ja) * 1996-02-14 1996-09-10 Yanmar Diesel Engine Co Ltd 空冷式内燃機関
JP2001090521A (ja) * 1999-09-21 2001-04-03 Kubota Corp 火花点火式エンジン
US6216649B1 (en) * 1999-05-19 2001-04-17 Adventech Corporation Low emission two-cycle internal combustion engine for powering a portable tool
CN1989322A (zh) * 2004-07-22 2007-06-27 洋马株式会社 引擎
CN101082311A (zh) * 2007-06-29 2007-12-05 无锡开普动力有限公司 一种风冷柴油机的气缸盖
CN201062547Y (zh) * 2007-06-29 2008-05-21 无锡开普动力有限公司 一种风冷柴油机的气缸盖

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08232654A (ja) * 1996-02-14 1996-09-10 Yanmar Diesel Engine Co Ltd 空冷式内燃機関
US6216649B1 (en) * 1999-05-19 2001-04-17 Adventech Corporation Low emission two-cycle internal combustion engine for powering a portable tool
JP2001090521A (ja) * 1999-09-21 2001-04-03 Kubota Corp 火花点火式エンジン
CN1989322A (zh) * 2004-07-22 2007-06-27 洋马株式会社 引擎
CN101082311A (zh) * 2007-06-29 2007-12-05 无锡开普动力有限公司 一种风冷柴油机的气缸盖
CN201062547Y (zh) * 2007-06-29 2008-05-21 无锡开普动力有限公司 一种风冷柴油机的气缸盖

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113294261A (zh) * 2021-06-29 2021-08-24 潍柴动力股份有限公司 缸盖、涂层制备装置及涂层制备方法

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