WO2009104655A1 - シリンダライナの冷却構造 - Google Patents
シリンダライナの冷却構造 Download PDFInfo
- Publication number
- WO2009104655A1 WO2009104655A1 PCT/JP2009/052823 JP2009052823W WO2009104655A1 WO 2009104655 A1 WO2009104655 A1 WO 2009104655A1 JP 2009052823 W JP2009052823 W JP 2009052823W WO 2009104655 A1 WO2009104655 A1 WO 2009104655A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling chamber
- cylinder liner
- cooling
- outer peripheral
- upper cooling
- Prior art date
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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
- F02F1/16—Cylinder liners of wet type
Definitions
- the present invention is applied to a cylinder liner of a large diesel engine, and relates to a cooling structure of a cylinder liner in which a cooling chamber is provided between an outer peripheral surface of a cylinder liner and an inner periphery of a cover that fluidly covers an outer side of the outer peripheral surface.
- FIG. 5 is a cross-sectional view of a cylinder half of an assembly structure of a cylinder liner and a cylinder cover in a large diesel engine.
- 1 is a cylinder liner
- 2 is a cylinder cover fixed to the cylinder liner 1 with a plurality of bolts (not shown).
- the cylinder liner 1 and the cylinder cover 2 are fixed fluid-tightly via a metal casket 6 or the like.
- 5 is a force par
- the upper end of the cover 5 is fixed to the cylinder cover 2
- the lower end is fixed to the cylinder liner 1, covering the outside of the outer peripheral surface 1f of the cylinder liner 1 in a fluid-tight manner
- a cooling chamber 4 is formed between the inner periphery of the cover 5.
- the lower surface of the cover 5 is fixed to the upper surface of the cylinder block 10 (9 indicates a fixed surface), and the lower side portion seals the side portion of the cylinder liner 1 with an O-ring 8.
- the cooling water of the cylinder liner 1 and cylinder cover 2 enters the cooling chamber 4 from the cooling hole 16 of the cylinder block 10 through the inlet hole 15, where the inner wall 1 a and the outer periphery of the cylinder liner 1
- the surface 1 f is cooled, passes through the cooling hole 1 6, reaches the cooling hole 3 of the cylinder cover 2, and cools the cylinder cover 2.
- Patent Document 1 Japanese Patent Laid-Open No. Sho 62-2525394.5
- a plurality of notches extending radially outward around the upper portion of the cylinder liner and extending in the cylinder axial direction are formed at approximately equal intervals, and are connected to the notches in common.
- a reinforcing ring having a passage therethrough is fitted over the upper portion of the cylinder, and coolant is circulated through the passage and the notch.
- Patent Document 1 Japanese Patent Laid-Open No. Sho 6 2-2 5 3 9 4 5
- the present invention improves the heat transfer coefficient on the cooling water side of the outer peripheral surface of the cylinder liner with a cooling means for the cylinder liner that has a very simple structure, requires few processing steps, and is low in cost. Therefore, it is an object of the present invention to provide a cylinder liner cooling structure that can cope with high engine Pme.
- the present invention achieves such an object.
- a cooling chamber is provided between the outer peripheral surface of the cylinder liner and the inner periphery of the cover that fluidly covers the outside of the outer peripheral surface.
- the cooling chamber is partitioned into an upper cooling chamber and a lower cooling chamber, and the partition portion is fluid-tightly sealed between the upper cooling chamber and the lower cooling chamber by the force par,
- the partition part there are opened ejection holes for ejecting cooling fluid from the lower cooling chamber to the upper cooling chamber, and a plurality of the ejection holes are opened in the circumferential direction with the opening direction directed toward the outer peripheral wall of the upper cooling chamber It is characterized by that.
- each of the ejection holes is perforated in the same direction in the circumferential direction in the partition part, and an outlet to the upper cooling chamber is opened in an oval shape.
- Each of the ejection holes is formed in the partition portion so as to be inclined in a radial direction toward the outer peripheral wall of the upper cooling chamber, and an outlet to the upper cooling chamber is opened in an oval shape.
- the hole shape is not limited to an ellipse, but may be an ellipse for the purpose of stress reduction or an elliptical shape curved corresponding to the outlet opening.
- the invention can also be configured as follows.
- an ejection nozzle having a root fixed to the partition is provided, and the ejection hole is formed in the ejection nozzle.
- the cooling chamber is partitioned into an upper cooling chamber and a lower cooling chamber, and the partition portion is fluid-tightly sealed between the upper cooling chamber and the lower cooling chamber by the cover. Since a plurality of jet holes are opened in the circumferential direction and the opening direction is directed toward the outer wall of the upper cooling chamber, the cooling chamber is opened.
- the coolant is ejected from the cylinder liner, and this coolant is ejected toward the outer wall surface of the cylinder liner that becomes high temperature, particularly toward the portion corresponding to the first piston ring.
- the heat transfer coefficient of the wall rises and the outside of the cylinder liner It can be allowed to lower the temperature of the surface.
- the cooling chamber is divided into an upper cooling chamber and a lower cooling chamber by fluid-tight sealing with a force par and a partition portion, and an ejection hole for ejecting a cooling fluid from the lower cooling chamber to the upper cooling chamber in the partition portion
- a cylinder liner cooling means with a very simple structure, low processing man-hours, and a low cost, with multiple openings in the circumferential direction and opening direction toward the outer wall of the upper cooling chamber.
- the heat transfer coefficient on the cooling water side of the surface can be improved.
- a cooling structure of na is obtained.
- each ejection hole is perforated in the same direction in the circumferential direction in the partition part, and if the outlet to the upper cooling chamber is formed in an oval shape, it is perforated in the same direction.
- swirling water from each jet hole forms a swirling flow in the circumferential direction, and the heat transfer coefficient on the cooling water side can be increased along the outer peripheral surface of the cylinder, further improving the cooling effect.
- the outlet to the upper cooling chamber is formed in an oval shape, the exit radius can be increased and hoop stress can be reduced.
- FIG. 1 is an upper cross-sectional view of a cylinder half of a cylinder liner assembly structure in a large diesel engine according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 (part 1).
- (B) is an enlarged view of part Y in Fig. 2.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 1 (part 2).
- FIG. 4A is an upper cross-sectional view of the cylinder half of the cylinder liner assembly structure in the large-sized diesel engine according to the second embodiment of the present invention.
- (B) is an enlarged view of a portion Z in FIG.
- FIG. 5 is a cross-sectional view of the cylinder half of the assembly structure of the cylinder liner and cylinder force bar in the large diesel engine.
- FIG. 1 is an upper cross-sectional view of a cylinder half of a cylinder liner assembly forging in a large diesel engine according to a first embodiment of the present invention.
- 2 is a sectional view taken along line AA in FIG. 1 (part 1)
- FIG. 3 is a sectional view taken along line AA in FIG. 1 (part 2).
- 1 is a cylinder liner, and a cylinder cover 2 is fixed on the cylinder liner 1 with a plurality of bolts (not shown) as shown in FIG.
- Reference numeral 5 denotes a cover, and the upper end of the copper 5 is fluid-tightly fixed to the upper support portion 1 d of the cylinder liner 1 via an O-ring 7.
- the cooling chamber formed by the force par 5 is partitioned into an upper cooling chamber 10 and a lower cooling chamber 4 by a partition boss 1c.
- the outer periphery of the partition boss 1 c is fluid-tightly sealed to the cover 5 via an O-ring 11.
- the lower end of the lower cooling chamber 4 is fluid-tightly fixed to the lower support 1 e of the cylinder liner 1 via an O-ring 8.
- the partition boss 1 c has an ejection hole 13 for ejecting cooling water from the lower cooling chamber 4 to the upper cooling chamber 10, and the ejection hole 13 is formed as follows.
- a plurality of the ejection holes 13 are arranged in the circumferential direction and the opening direction ⁇ of the axis 13 s is opened toward the outer wall 1 f of the upper cooling chamber 10. is doing.
- This opening direction is determined by experiment or simulation calculation.
- Each ejection hole 13 is drilled in the partition boss 1c with its axis line 13s inclined in the same direction in the circumferential direction, so that the outlet to the upper cooling chamber 10 is formed as shown in FIG. It is formed in an oval shape 1 3 a as shown in FIG.
- the outlet to the upper cooling chamber 10 is formed in an oval shape 13 a, the radius of the outlet can be increased and the hoop stress can be reduced.
- the hole shape can be not only a perfect circle but also an ellipse for the purpose of stress reduction or a curved ellipse.
- the second example includes a plurality of the ejection holes 13 in the circumferential direction and an opening direction a of the axis 13 s directed toward the outer wall 1 f of the upper cooling chamber 10. Open diagonally in the direction.
- the axial line 13 s of each of the ejection holes 13 is not inclined and faces the cylinder center 100. In this case, the processing of each ejection hole 13 is simplified.
- Other configurations are the same as those in FIG.
- the cooling chamber is partitioned into an upper cooling chamber 10 and a lower cooling 4 chamber, and the partition boss 1 c is fluid-tightly sealed by the force par 5, and the lower portion of the partition boss 1 c is A plurality of jet holes 13 are formed in the circumferential direction and the outer wall 1 f of the upper cooling chamber 10 has a plurality of openings in the circumferential direction.
- the cooling chamber is divided into two stages of the upper cooling chamber 10 and the lower cooling chamber 4, and the upper cooling chamber 10 that becomes high temperature is divided into a plurality of partition bosses 1c in the circumferential direction.
- the cooling water is ejected from an ejection hole 13 which opens toward the outer wall 1 f of the upper cooling chamber 10, and the outer wall surface 1 f of the cylinder liner 1 is heated to a high temperature. Since the air is ejected toward the outer wall 1 f near the piston ring-corresponding site, the outer wall is affected by the collision between the outer wall 1 f and the injected cooling water. Heat transfer coefficient of 1 f is increased, it is possible allowed to lower the temperature of the outer wall surface 1 f of the cylinder liner 1.
- the cooling chamber is divided into the upper cooling chamber 10 and the lower cooling chamber 4 by fluid-tight sealing with the force par 5 and the partition boss 1 c, and the upper cooling from the lower cooling chamber 4 to the partition boss 1 c.
- the low-cost cooling means of the cylinder liner 1 can improve the heat transfer coefficient on the cooling water side of the outer peripheral surface 1 f of the cylinder liner 1, which makes it possible to increase the engine's temperature. Liner 1 cooling structure is obtained. [Example 2]
- FIG. 4A is an upper cross-sectional view of the cylinder half of the assembly structure of the cylinder liner in the large diesel engine according to the second embodiment of this effort.
- (B) is an enlarged view of a portion Z in FIG.
- an ejection nozzle 12 having a root fixed to the partition boss lc is provided, and the ejection hole is formed in the ejection nozzle 12 as shown in FIG. 4 (B).
- 1 2 b and nozzle hole with narrowed exit 1 2 a is provided instead of the ejection hole 13 of the first embodiment, and the ejection hole is formed in the ejection nozzle 12 as shown in FIG. 4 (B).
- the circumferential position of the ejection nozzle 12 is configured as shown in FIGS.
- the other structure is the same as that of FIG. 1, and the same member is shown with the same code
- the heat transfer rate on the cooling water side due to the collision with the outer peripheral surface 1 f of the cylinder liner 1 is changed by changing the length, direction, and inner diameter of the ejection nozzle 12. This makes it possible to select the ejection nozzle 12 having the optimum temperature condition.
- the cooling rate of the cylinder liner outer peripheral surface is improved by the cooling means of the cylinder liner, which has a very simple structure, requires few processing steps, and is low in cost. Cylinder liner cooling structure that can support me conversion.
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- 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
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020107014397A KR101207162B1 (ko) | 2008-02-22 | 2009-02-12 | 실린더 라이너의 냉각 구조 |
CN2009801015143A CN101910597A (zh) | 2008-02-22 | 2009-02-12 | 气缸套的冷却结构 |
EP09712399A EP2224119A1 (en) | 2008-02-22 | 2009-02-12 | Ccoling structure of cylinder liner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008040786A JP2009197698A (ja) | 2008-02-22 | 2008-02-22 | シリンダライナの冷却構造 |
JP2008-040786 | 2008-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009104655A1 true WO2009104655A1 (ja) | 2009-08-27 |
Family
ID=40985533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/052823 WO2009104655A1 (ja) | 2008-02-22 | 2009-02-12 | シリンダライナの冷却構造 |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2224119A1 (ja) |
JP (1) | JP2009197698A (ja) |
KR (1) | KR101207162B1 (ja) |
CN (1) | CN101910597A (ja) |
WO (1) | WO2009104655A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018102064A1 (de) * | 2018-01-30 | 2019-08-01 | Man Energy Solutions Se | Zylinderlaufbuchse und Brennkraftmaschine |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4224725B1 (ja) * | 2007-11-08 | 2009-02-18 | トヨタ自動車株式会社 | シリンダブロックおよびその製造方法 |
JP2012021406A (ja) | 2010-07-12 | 2012-02-02 | Mitsubishi Heavy Ind Ltd | シリンダライナ |
JP5656506B2 (ja) * | 2010-08-17 | 2015-01-21 | 三菱重工業株式会社 | シリンダライナ |
CN105569866A (zh) * | 2015-11-27 | 2016-05-11 | 沪东重机有限公司 | 一种船用柴油机气缸套冷却水流道的结构 |
CN105626537B (zh) * | 2016-01-04 | 2018-01-23 | 广东美芝制冷设备有限公司 | 气缸及其制造方法、压缩机 |
DE102016213252A1 (de) | 2016-07-20 | 2018-01-25 | Man Diesel & Turbo Se | Brennkraftmaschine mit mindestens einem Zylinder, dessen Zylinderlaufbuchse über ein flüssiges Kühlmittel kühlbar ist |
CN107939541A (zh) * | 2017-09-30 | 2018-04-20 | 中国北方发动机研究所(天津) | 一种双层射流式气缸套冷却结构 |
CN108457764A (zh) * | 2018-05-03 | 2018-08-28 | 哈尔滨工程大学 | 一种带有肋片的湿式气缸套 |
DE202023102190U1 (de) | 2023-04-25 | 2023-05-04 | Innio Jenbacher Gmbh & Co Og | Zylinderlaufbuchse für eine Brennkraftmaschine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6234117U (ja) * | 1985-08-19 | 1987-02-28 | ||
JPS62253945A (ja) | 1986-03-31 | 1987-11-05 | Tech Res Assoc Highly Reliab Marine Propul Plant | 液冷式内燃機関のシリンダ構造 |
JPS63171642U (ja) * | 1987-04-30 | 1988-11-08 | ||
JPH0738641U (ja) * | 1993-12-16 | 1995-07-14 | 三菱重工業株式会社 | シリンダライナ |
JP2002221081A (ja) * | 2001-01-25 | 2002-08-09 | Yanmar Diesel Engine Co Ltd | 内燃機関のシリンダブロック冷却構造 |
-
2008
- 2008-02-22 JP JP2008040786A patent/JP2009197698A/ja active Pending
-
2009
- 2009-02-12 EP EP09712399A patent/EP2224119A1/en not_active Withdrawn
- 2009-02-12 CN CN2009801015143A patent/CN101910597A/zh active Pending
- 2009-02-12 KR KR1020107014397A patent/KR101207162B1/ko active IP Right Grant
- 2009-02-12 WO PCT/JP2009/052823 patent/WO2009104655A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6234117U (ja) * | 1985-08-19 | 1987-02-28 | ||
JPS62253945A (ja) | 1986-03-31 | 1987-11-05 | Tech Res Assoc Highly Reliab Marine Propul Plant | 液冷式内燃機関のシリンダ構造 |
JPS63171642U (ja) * | 1987-04-30 | 1988-11-08 | ||
JPH0738641U (ja) * | 1993-12-16 | 1995-07-14 | 三菱重工業株式会社 | シリンダライナ |
JP2002221081A (ja) * | 2001-01-25 | 2002-08-09 | Yanmar Diesel Engine Co Ltd | 内燃機関のシリンダブロック冷却構造 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018102064A1 (de) * | 2018-01-30 | 2019-08-01 | Man Energy Solutions Se | Zylinderlaufbuchse und Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
KR20100090300A (ko) | 2010-08-13 |
CN101910597A (zh) | 2010-12-08 |
JP2009197698A (ja) | 2009-09-03 |
KR101207162B1 (ko) | 2012-11-30 |
EP2224119A1 (en) | 2010-09-01 |
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