CN101298853A - Diesel split type cylinder cap - Google Patents
Diesel split type cylinder cap Download PDFInfo
- Publication number
- CN101298853A CN101298853A CNA2008100386800A CN200810038680A CN101298853A CN 101298853 A CN101298853 A CN 101298853A CN A2008100386800 A CNA2008100386800 A CN A2008100386800A CN 200810038680 A CN200810038680 A CN 200810038680A CN 101298853 A CN101298853 A CN 101298853A
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- China
- Prior art keywords
- water
- cylinder cover
- cylinder head
- plate
- shutting
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Abstract
This invention is related to a diesel engine separate type cylinder cover, including a cylinder cover, a plate for shutting off water mounted the cylinder cover and a body, a cooling water chamber of a burning room placed between a cylinder sleeve and the plate for shutting off water; the burning room consisting of the cylinder cover and the cylinder sleeve is flexibly connected with the cooling water chamber of a burning room through a rubber sealing element. A gap of 1.5-2 mm is between the bottom of the cylinder cover and the plate for shutting off water; a water inlet and outlet passages of the plate for shutting off water are cone. The mode of mounting the plate for shutting off water between the cylinder cover and the body eliminates the cylinder cover crackle caused by heat stress concentration, and reduces the cavity bubble in the cooling water, prevents the serious cavitation erosion, enlarges the service life of the cylinder cover; and the plate for shutting off water is easy to mount; before improving, the mounting state of the cylinder cover only can be checked after the whole machine press test is reset, and it is simple and convenient for judging the mounting state of the cylinder cover through directly viewing the mounting state of the rubber ring after processing the separate improvement.
Description
Technical field
The present invention relates to a kind of cylinder cover for diesel engine, especially a kind of cylinder head that has the firing chamber cooling water chamber.
Background technique
At present, the effect of ocean horse 6N260-EN cylinder cover for diesel engine removes the closed cylinder working space and forms the firing chamber, be used for installing oil nozzle, air inlet and exhaust valve, starter gate valve and indicator valve safety valve, cylinder head inside is provided with into, outside exhaust passage and the cooling water chamber etc., it is (shown in Figure 1 also to be provided with the firing chamber cooling water chamber at ring edge, the bottom of cylinder head, the firing chamber is to be embedded in the cylinder head), because the operating conditions of cylinder head is very harsh, to bear the dither mechanical stress that gas pressure produced that Installation Stress that the cylinder head bolt pretightening force produced and cylinder intercycle change on the one hand; Cylinder head base plate combustion gas side also will be subjected to the violent heating and the corrosion of high-temperature combustion gas on the other hand, (heat that is transmitted by combustion gas and the high speed of exhaust are washed away), temperature is the highest near making cylinder head central authorities and air release valve hole, reach 400 ~ 480 ℃, and the temperature of the periphery of cylinder head and cooling water side relatively low (60～80 ℃) makes the temperature distribution of cylinder head very inhomogeneous; Because the constraint of cylinder head bolt fastening force etc. is restricted the thermal expansion of high-temperature part, increase the firing chamber cooling water chamber in addition to make structural distribution irregular again, thereby produced very big thermal stress.Long-time running firing chamber cooling water chamber just is easy to generate crackle.Again because cooling water chamber design too narrow and small, the dither when the too small and layout of water inlet and outlet passage does not conform to profit and combustion explosion makes that firing chamber cooling water chamber cavitation pitting phenomenon is very serious.
Although the ocean horse 6N260-EN diesel engine design of the cooling water chamber of analytic combustion chamber theoretically is more advanced, but it is unreasonable from true stress distribution, casting section thickness and water cavity structure, this cylinder cover for diesel engine is all-in-one-piece structure because of itself and firing chamber cooling water chamber, crack with cavitation pitting after be difficult to take measures reach and repair the purpose of using, and each dismantlement work amount is bigger, in addition, local crackle, the easy cavitation pitting of water cavity inwall of easily taking place that cylinder cap bottom stress is concentrated, wall is thin.Corresponding heat load and vibration are risen certainly when power load increases, and contradiction just concentrates on the cooling water chamber of firing chamber, and the thermal stress concentrations will cause the cooling water chamber cracking, vibrate the excessive cavitation pitting that causes and take place.
Summary of the invention
The present invention will provide a kind of diesel engine split type cylinder head, and this split cylinder head can solve because of the concentrated technical problem that makes cracked cylinder head of thermal stress.
For achieving the above object, technological scheme of the present invention is: the split type cylinder head of a kind of diesel engine, comprise cylinder head, cylinder liner, body, the firing chamber cooling water chamber is characterized in: set up the water shutoff plate between described cylinder head and the body, the firing chamber cooling water chamber places between cylinder liner and the water shutoff plate, and whole firing chamber flexibly connects by rubber seal and water shutoff plate.
Leave the L=1.5-2mm gap between cylinder head bottom and the water shutoff plate; It is conical that the water-in and water-out passage of water shutoff plate is.
The invention has the beneficial effects as follows:
The present invention is by setting up the mode of water shutoff plate between cylinder head and body, has eliminated because of the concentrated phenomenon that makes cracked cylinder head of thermal stress (1).(2) alleviate the cavity phenomenon in the cooling water, prevented the generation of serious cavitation pitting.(3) prolonged working life of cylinder head.(4) as long as carry out certain machining and just can continue to use because of former integrated cylinder cover that crackle and serious cavitation pitting intend scrapping occurring, joint is supported joint power.(5) installation of water shutoff plate is simple and convenient, and cylinder head is installed the quality complete machine packer permeability test that will reset by the time before improving, and split improves the back quality that just can judge the cylinder head installation according to the rubber ring installation situation that goes up directly perceived, and is simple and efficient.
Description of drawings
Fig. 1 is existing piece cylinder head structural representation;
Fig. 2 is a split type air cylinder head structure schematic representation of the present invention;
Fig. 3 is a firing chamber cooling water chamber schematic representation in the existing piece cylinder head;
Fig. 4 is the firing chamber cooling water chamber schematic representation that water shutoff plate of the present invention constitutes.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 2, split type cylinder head of the present invention comprises cylinder head 1, cylinder liner 3, body 4, piston 5, water shutoff plate 2, firing chamber cooling water chamber 6.
Set up water shutoff plate 2 between cylinder head 1 and the body 4, firing chamber cooling water chamber 6 places between cylinder liner 3 and the water shutoff plate 2, and whole firing chamber 10 flexibly connects by rubber seal and water shutoff plate 2.
Set up water shutoff plate 2 between cylinder head 1 and the body 4, be used to eliminate because of the concentrated phenomenon that makes cylinder head 1 crackle of thermal stress.
The present invention does the split transformation with foreign horse 6N260-EN diesel engine cylinder head.Crackle not only can realize repairing the purpose of use after producing like this, and alleviates dismounting labor intensity, and then is enterprise's joint money synergy.Do not change the diesel engine overall performance, only structurally do improvement as Fig. 2.Between cylinder head and body, set up the water shutoff plate and replace former firing chamber cooling water chamber, the water shutoff plate adopts cast steel material, what adopt because of cylinder head is alloy cast iron, and the expansion coefficient basically identical of two kinds of materials is not so can cause both cooperations of deformation effect because of heat load.
Claims (3)
1. split type cylinder head of diesel engine, comprise cylinder head (1), cylinder liner (3), body (4), firing chamber cooling water chamber (6) is characterized in that, sets up water shutoff plate (2) between described cylinder head (1) and the body (4), firing chamber cooling water chamber (6) places between cylinder liner (3) and the water shutoff plate (2), and whole firing chamber (10) flexibly connect by rubber seal and water shutoff plate (2).
2. the split type cylinder head of diesel engine according to claim 1 is characterized in that, leaves the L=1.5-2mm gap between described cylinder head (1) bottom and the water shutoff plate (2).
3. the split type cylinder head of diesel engine according to claim 1 is characterized in that, it is conical that the water-in and water-out passage of described water shutoff plate (2) is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100386800A CN101298853A (en) | 2008-06-06 | 2008-06-06 | Diesel split type cylinder cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100386800A CN101298853A (en) | 2008-06-06 | 2008-06-06 | Diesel split type cylinder cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101298853A true CN101298853A (en) | 2008-11-05 |
Family
ID=40078779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100386800A Pending CN101298853A (en) | 2008-06-06 | 2008-06-06 | Diesel split type cylinder cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101298853A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839189A (en) * | 2010-07-02 | 2010-09-22 | 无锡动力工程股份有限公司 | Labyrinth air cylinder leakproof structure |
| CN103912402A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Engine air cylinder cover and air cylinder sleeve seal structure |
| CN106640399A (en) * | 2015-11-02 | 2017-05-10 | 曼柴油机欧洲股份公司曼柴油机德国分公司 | A cylinder liner for a two-stroke crosshead engine |
| CN107461271A (en) * | 2017-09-12 | 2017-12-12 | 重庆潍柴发动机有限公司 | Cylinder head |
-
2008
- 2008-06-06 CN CNA2008100386800A patent/CN101298853A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839189A (en) * | 2010-07-02 | 2010-09-22 | 无锡动力工程股份有限公司 | Labyrinth air cylinder leakproof structure |
| CN103912402A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Engine air cylinder cover and air cylinder sleeve seal structure |
| CN106640399A (en) * | 2015-11-02 | 2017-05-10 | 曼柴油机欧洲股份公司曼柴油机德国分公司 | A cylinder liner for a two-stroke crosshead engine |
| CN107461271A (en) * | 2017-09-12 | 2017-12-12 | 重庆潍柴发动机有限公司 | Cylinder head |
| CN107461271B (en) * | 2017-09-12 | 2023-03-24 | 重庆潍柴发动机有限公司 | Cylinder head |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081105 |