CN203783752U - Engine piston for ship - Google Patents
Engine piston for ship Download PDFInfo
- Publication number
- CN203783752U CN203783752U CN201420230400.7U CN201420230400U CN203783752U CN 203783752 U CN203783752 U CN 203783752U CN 201420230400 U CN201420230400 U CN 201420230400U CN 203783752 U CN203783752 U CN 203783752U
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- CN
- China
- Prior art keywords
- piston
- firing chamber
- engine piston
- ship
- combustion chamber
- Prior art date
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses an engine piston for a ship. The engine piston for the ship comprises a piston body, an omega-shaped combustion chamber and a piston ring groove, wherein the omega-shaped combustion chamber is arranged on the top of the piston body, and has the width of 112mm and the depth value range of 15-30mm; the value range of the radius of a transition circular arc between the combustion chamber and the top of the piston is 2-10mm; the value range of the radius of a transition circular arc of the bottom of the combustion chamber is 25-50mm; the piston ring groove is formed in the peripheral surface of the piston body and is in a four-ring groove structure. The engine piston for the ship is simple and reasonable in structure, is provided with a big opening and a shallow cavity, and is beneficial to combustion and long in service life; the charging efficiency of the combustion chamber is high, furthermore, according to the engine piston for the ship, the number of gas rings is increased, so that the sealing effect of the gas rings can be improved; a lifting bolt hole is formed in a boss of the combustion chamber, so that the engine piston for the ship is convenient to lift.
Description
Technical field
The utility model relates to engine art, particularly a kind of marine engine piston.
Background technique
Piston is the core work parts of diesel engine, and the head of piston is generally designed with the chamber structure of depression, and effect is the diesel combustion efficiency while improving diesel engine work, makes burning more abundant, has the effect of energy-saving and emission-reduction.
The chamber structure of existing marine engine piston mostly is circular depressed, and its section is the reducing type that is similar to ω formula, and central authorities have protruding base frame, and oral area is reducing and small for mouth and large for cavity.The chamber structure of the reducing form of marine engine piston has certain help to the robust motion of piston, but also exists some problems simultaneously:
First, the firing chamber of existing marine engine piston is small for mouth and large for cavity, be unfavorable for air inlet, need to lean on the formation of mixed gas in strong intake swirl and high oil sprayer atomization ability guarantee firing chamber, but the rotating ratio of large-scale marine engine is lower, can cause the negative effect that firing chamber charging efficiency is low like this, form longer delay period, cause the increase of nitrogen oxide (NOX) discharge.
In addition, the general reducing in firing chamber of existing marine engine piston is larger, reducing part not only will stand the acute variation of temperature, also to bear have high pressure air whirl enter/go out mobile brought impact load, its mechanical property is easy to decline, there is too early structural damage, thereby can have influence on the life-span of piston.For ship machine, reliability requirement is stricter, and maintenance is more difficult, and safety is important.
Also have, existing marine engine piston is generally two road compression rings, but the cylinder diameter of ship machine is larger, and the matching gap of piston and cylinder sleeve is relatively large, and the sealing effect of two road compression rings is poor, causes the air leakage of piston excessive.
The information that is disclosed in this background technique part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Model utility content
It is a kind of simple and reasonable that the purpose of this utility model is to provide, and mouthful large chamber is shallow, be beneficial to burning, compression ring good sealing effect, and long service life, lifts marine engine piston easily.
For achieving the above object, the utility model provides marine engine piston, comprising: piston body; ω shape firing chamber, be opened in the top of piston body, the width of this ω shape firing chamber is 112mm, and the span of the degree of depth is 15-30mm, the span of firing chamber and piston head transition arc radius is 2-10mm, and the span of bottom, firing chamber transition arc radius is 25-50mm; And piston ring groove, it is four groove structures that are opened in the outer circumferential face of piston body.
Preferably, in technique scheme, the width of ω shape firing chamber is 112mm, and the degree of depth is 19mm, and firing chamber and piston head transition arc radius are 4mm, and bottom, firing chamber transition arc radius is 35mm.
Preferably, in technique scheme, the bottom of ω shape firing chamber 11 is provided with boss, and boss offers lifting bolt hole.
Preferably, in technique scheme, piston ring groove comprises: be positioned at San road, top compression ring oil ring together with below being positioned at.
Compared with prior art, the utlity model has following beneficial effect: this marine engine piston is simple and reasonable, mouthful large chamber is shallow, firing chamber charging efficiency is high, is beneficial to burning, and long service life; In addition, this marine engine piston has increased compression ring quantity, has improved the sealing effect of compression ring, and has lifting bolt hole at boss place, firing chamber, makes its lifting convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of marine engine piston of the present utility model.
Main description of reference numerals:
1-piston body, 11-ω shape firing chamber, 12-lifts bolt hole, 13-compression ring, 14-oil ring.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole specification and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 1, according to the concrete structure of the marine engine piston of the utility model embodiment, comprise: piston body 1, and the ω shape firing chamber 11 and the piston ring groove that is opened in this piston body outer circumferential face that are opened in this piston body top, the 11Kou great chamber, ω shape firing chamber of this marine engine piston is shallow, firing chamber charging efficiency is high, be beneficial to burning, and long service life; In addition, the piston ring groove of this marine engine piston has increased compression ring quantity, has improved the sealing effect of compression ring.
ω shape firing chamber 11 is the shallow shallow mouth structure in mouthful large chamber, and aditus laryngis inside contracts; The bottom of ω shape firing chamber 11 is provided with boss, and the bottom of firing chamber is that orthodrome is connected with boss.The width A of ω shape firing chamber 11 is 112mm.The span of the depth B of ω shape firing chamber 11 is 15-30mm, and preferably, the depth B of ω shape firing chamber 11 is 19mm.The span of the firing chamber of ω shape firing chamber 11 and piston head transition arc radius C is 2-10mm, and preferably, the firing chamber of ω shape firing chamber 11 and piston head transition arc radius C are 4mm.The span of bottom, the firing chamber transition arc radius D of ω shape firing chamber 11 is 25-50mm, and preferably, bottom, the firing chamber of ω shape firing chamber 11 transition arc radius D is 35mm.
The boss of ω shape firing chamber 11 also offers lifting bolt hole 12, for lifting this marine engine piston, makes its lifting convenient.
Piston ring groove is four groove structures, comprising: be positioned at the compression ring sealing effect that San road, top compression ring 13 oil ring 14, three road compression rings 13 together with below being positioned at can improve this marine engine piston, reduce the air leakage of this marine engine piston.
To sum up, this marine engine piston is simple and reasonable, and mouthful large chamber is shallow, firing chamber charging efficiency is high, is beneficial to burning, and long service life; In addition, this marine engine piston has increased compression ring quantity, has improved the sealing effect of compression ring, and has lifting bolt hole at boss place, firing chamber, makes its lifting convenient.
The aforementioned description to concrete exemplary of the present utility model is for the object with illustration is described.These descriptions not want the utility model to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present utility model and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present utility model and various selection and change.Scope of the present utility model is intended to be limited by claims and equivalents thereof.
Claims (4)
1. a marine engine piston, is characterized in that, comprising:
Piston body;
ω shape firing chamber, be opened in the top of described piston body, the width of this ω shape firing chamber is 112mm, and the span of the degree of depth is 15-30mm, the span of firing chamber and piston head transition arc radius is 2-10mm, and the span of bottom, firing chamber transition arc radius is 25-50mm; And
Piston ring groove, it is four groove structures that are opened in the outer circumferential face of described piston body.
2. marine engine piston according to claim 1, is characterized in that, the width of described ω shape firing chamber is 112mm, and the degree of depth is 19mm, and firing chamber and piston head transition arc radius are 4mm, and bottom, firing chamber transition arc radius is 35mm.
3. marine engine piston according to claim 1, is characterized in that, the bottom of described ω shape firing chamber is provided with boss, and described boss offers lifting bolt hole.
4. according to the marine engine piston described in any one in claims 1 to 3, it is characterized in that, described piston ring groove comprises: be positioned at San road, top compression ring oil ring together with below being positioned at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420230400.7U CN203783752U (en) | 2014-05-07 | 2014-05-07 | Engine piston for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420230400.7U CN203783752U (en) | 2014-05-07 | 2014-05-07 | Engine piston for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783752U true CN203783752U (en) | 2014-08-20 |
Family
ID=51319946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420230400.7U Expired - Fee Related CN203783752U (en) | 2014-05-07 | 2014-05-07 | Engine piston for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783752U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939228A (en) * | 2014-05-07 | 2014-07-23 | 广西玉柴机器股份有限公司 | Engine piston for ship |
| CN108343527A (en) * | 2018-03-14 | 2018-07-31 | 东风商用车有限公司 | Large open combustion chamber and combustion system |
-
2014
- 2014-05-07 CN CN201420230400.7U patent/CN203783752U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939228A (en) * | 2014-05-07 | 2014-07-23 | 广西玉柴机器股份有限公司 | Engine piston for ship |
| CN108343527A (en) * | 2018-03-14 | 2018-07-31 | 东风商用车有限公司 | Large open combustion chamber and combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |