CN104179590A - Wear-resistant piston - Google Patents
Wear-resistant piston Download PDFInfo
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- CN104179590A CN104179590A CN201410303412.2A CN201410303412A CN104179590A CN 104179590 A CN104179590 A CN 104179590A CN 201410303412 A CN201410303412 A CN 201410303412A CN 104179590 A CN104179590 A CN 104179590A
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- skirt section
- piston
- oil
- wear
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Abstract
The invention relates to a wear-resistant piston and belongs to the technical field of piston machining. The piston comprises a head part and a skirt part connected to the lower end of the head part; the head part is provided with an oil ring slot; two opposite pin holes are formed in two sides of the skirt part; the cross section of the skirt part is oval; a plurality of oil through holes are formed in the skirt part. The piston is long in service life and wear-resistant.
Description
Technical field
The present invention relates to a kind of piston coordinating with cylinder, especially a kind of wear-resisting piston, belongs to Piston Machining technical field.
Background technique
When piston is normally worked and between cylinder, there is strict matching gap, because the effect of high-temperature expansion, in order to prevent that seizure of piston is in cylinder, can be taked some special measures conventionally in the structure of piston:
1), because the temperature on piston top is high, it is large that swell increment is wanted, so generally piston is made to up-small and down-big taper shape;
2), because the side pressure of piston skirt long axis direction is large, so conventionally ellipse is made in the skirt section of piston, oval major axis is in the direction perpendicular to key seat axially bored line;
3) multiple oil throughs are set in the oil ring groove of piston crown, can cooling and lubrication assistant skirt section, thus reduce the thermal expansion in skirt section.
Because piston in cylinder high temperature, at a high speed, lubricated difficulty and too small with the matching gap of cylinder, so require piston material to there is enough intensity, rigidity, less density and expansion coefficient, common used material is aluminum alloy.Piston known at present general is by head and skirt section composition, and skirt section is arm contact in cylinder, is the motion guide of piston.
According to the applicant understood, in order to reduce the friction and wear between piston and piston/cylinder, extend the life-span of piston and piston cylinder, existing piston is generally provided with oil guiding hole on head, in use, by oil guiding hole, lubricant oil is thrown to piston outside, the surface attachment that cylinder body is contacted with piston has film lubrication, prevents that inordinate wear from appearring in piston and cylinder body.
In addition; the skirt section of piston does not contact in the time normally using with cylinder body; and there is no lubricant oil between the outer skirt surface of common piston and piston/cylinder yet; but As time goes on, can there is slight deformation in piston and cylinder body, in the time that distortion is accumulated to a certain degree; can cause skirt section and the cylinder body of piston to produce friction; so not only reduced the working life of piston and cylinder body, and it is not steady that piston and cylinder body are moved, easily generation accident.
Summary of the invention
The technical problem that the present invention solves is: overcome the deficiencies in the prior art, propose a kind of long service life and wear-resisting piston.
In order to solve the problems of the technologies described above, the technological scheme that the present invention proposes is: a kind of Wear-resitsting pistons, comprise head and the skirt section that is connected to head lower end, and described head is provided with oil ring groove, the cross section in described skirt section is oval, and the both sides in described skirt section are provided with two relative pin-and-holes; Described skirt section is provided with some oil throughs.
The improvement of technique scheme is: described skirt section is provided with horizontal heat dam and longitudinal expansion slot, and described oil through is positioned at heat dam and/or expansion slot.
The further improvement of technique scheme is: described oil through is positioned on the line of major axis end points of all cross sections in skirt section.As preferred version, the both sides in described oil through separation skirt section, every side is provided with 4 oil throughs, and the diameter of described oil through is less than or equal to 2mm.
The further improvement of technique scheme is: the outer circumferential face in described skirt section is provided with some counterbores.As preferred version, the degree of depth of described counterbore is less than or equal to 1mm.
The beneficial effect that the present invention brings is: 1) the present invention is provided with oil through in the skirt section of piston, piston can throw away part oil to skirt surface in the time of work like this, can play the effect in lubricated skirt section, avoid the piston skirt and the cylinder body that cause because of piston and cylinder body generation slight deformation to produce dry friction, thereby increase the wear resistance of piston, and extended the life-span of piston.2) the present invention offers horizontal heat dam and longitudinal expansion slot in the skirt section of piston, and heat dam can prevent that the heat of piston crown from spreading to skirt section, reduced the distortion that skirt section causes because of thermal expansion, and the thermal expansion that expansion slot is skirt section leaves compensating action.3) cross section in skirt section is made ellipse by piston of the present invention, the distortion being produced by factors such as thermal expansions while work is like this along gudgeon pin shaft Directional Extension, make skirt section cross section become sub-circular, thereby in the time of pistons work, can obtain wider, more uniform supporting plane, also make the skirt section of piston and cylinder wall fit better simultaneously, reduced to join cylinder air gap, be conducive to reduce piston skirt specific pressure, reduce the impact of piston countercylinder wall, the noise while reducing motor operation.4) the present invention arranges oil-containing counterbore on the outer circumferential face in skirt section, even if can not throw away lubricant oil in certain period from oil through like this, also can ensure lubricating between piston and cylinder body, thereby further extend the working life of piston and cylinder body.
Brief description of the drawings
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of the embodiment of the present invention one.
Fig. 2 is the left view of Fig. 1.
embodiment
Embodiment one
The Wear-resitsting pistons of the present embodiment, as depicted in figs. 1 and 2, comprises head 1 and the skirt section 2 that is connected to head lower end, and head 1 is provided with oil ring groove 3, and the both sides in skirt section 2 are provided with two relative pin-and-holes 4; The position of skirt section 2 between two pin-and-holes 4 has oil through 5.Like this, the piston of the present embodiment can throw away the surface of part oil to skirt section 2 by oil through 5 in the time of work like this, play the effect in lubricated skirt section 2, avoid the skirt section 2 causing because of piston and cylinder body generation slight deformation to produce dry friction with cylinder body, thereby not only increase the wear resistance of piston, and extended the life-span of piston.
The cross section in the skirt section 2 in the present embodiment is oval, and oil through 5 is preferably opened on the line of major axis end points of all cross sections in skirt section 2, can make so all sufficient lubrications of skirt section 2.
As further preferred version, the live apart both sides in skirt section 2 of oil through 5, every side is provided with 4 oil throughs 5, and the diameter of oil through 5 is less than or equal to 2mm.
Embodiment two
The Wear-resitsting pistons of the present embodiment is the improvement on embodiment one basis, is: skirt section 2 is provided with horizontal heat dam with embodiment one difference.Like this, heat dam can prevent that the heat of piston crown 1 from spreading to skirt section 2, has reduced the distortion that skirt section 2 causes because of thermal expansion.
Embodiment three
The Wear-resitsting pistons of the present embodiment is the improvement on embodiment one basis, is with embodiment one difference: skirt section 2 is provided with longitudinal expansion slot 2-2, and oil through 5 is arranged in expansion slot 2-2.Like this, expansion slot 2-2 is that the thermal expansion in skirt section 2 leaves compensating action, and oil through 5 is arranged in expansion slot 2-2.
The present embodiment can also be done following improvement: the outer circumferential face in skirt section 2 is provided with some counterbore (not shown)s.Like this, can in counterbore, store certain lubricant oil, even even if can not throw away lubricant oil in certain period from oil through like this, also can ensure lubricating between piston and cylinder body, contribute to further to reduce the friction of skirt section 2 and cylinder body generation.As preferred version, the degree of depth of counterbore is less than 1mm, is preferably 0.5mm.
The present invention is not limited to the concrete technological scheme described in above-described embodiment, above-mentioned each embodiment's of the present invention technological scheme can combined crosswise form new technological scheme each other, for example: skirt section 2 can be provided with horizontal heat dam 2-1 and longitudinal expansion slot 2-2 simultaneously, etc.The technological scheme that all employings are equal to replacement formation is the protection domain that the present invention requires.
Claims (6)
1. a Wear-resitsting pistons, comprises head and the skirt section that is connected to head lower end, and described head is provided with oil ring groove, and the both sides in described skirt section are provided with two relative pin-and-holes; It is characterized in that: the cross section in described skirt section is for oval, and described skirt section is provided with some oil throughs.
2. Wear-resitsting pistons according to claim 1, is characterized in that: described skirt section is provided with horizontal heat dam and longitudinal expansion slot, and described oil through is positioned at heat dam and/or expansion slot.
3. Wear-resitsting pistons according to claim 1 and 2, is characterized in that: described oil through is positioned on the line of major axis end points of all cross sections in skirt section.
4. Wear-resitsting pistons according to claim 3, is characterized in that: the both sides in described oil through separation skirt section, and every side is provided with 4 oil throughs, and the diameter of described oil through is less than or equal to 2mm.
5. Wear-resitsting pistons according to claim 1 and 2, is characterized in that: the outer circumferential face in described skirt section is provided with some counterbores.
6. Wear-resitsting pistons according to claim 5, is characterized in that: the degree of depth of described counterbore is less than or equal to 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410303412.2A CN104179590A (en) | 2014-06-30 | 2014-06-30 | Wear-resistant piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410303412.2A CN104179590A (en) | 2014-06-30 | 2014-06-30 | Wear-resistant piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104179590A true CN104179590A (en) | 2014-12-03 |
Family
ID=51960892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410303412.2A Pending CN104179590A (en) | 2014-06-30 | 2014-06-30 | Wear-resistant piston |
Country Status (1)
| Country | Link |
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| CN (1) | CN104179590A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4691622A (en) * | 1984-10-10 | 1987-09-08 | Metallgesellschaft Aktiengesellschaft | Light alloy piston |
| US4903580A (en) * | 1985-04-12 | 1990-02-27 | Borgo-Nova Spa | Piston for alternative endothermic engines creating oil cushion lubrication |
| CN201025151Y (en) * | 2007-05-22 | 2008-02-20 | 郑庆和 | Piston |
| CN201439731U (en) * | 2009-07-29 | 2010-04-21 | 中国北车集团大同电力机车有限责任公司 | Diesel engine steel-top iron-skirt combination piston |
| CN101846013A (en) * | 2010-05-25 | 2010-09-29 | 浙江博瑞车业有限公司 | Piston |
| CN101929404A (en) * | 2009-06-27 | 2010-12-29 | 铜陵精恒机械有限责任公司 | Piston with steel top and aluminum skirt for 230SG type gas engine |
| CN203296951U (en) * | 2013-06-21 | 2013-11-20 | 常州常发动力机械有限公司 | Piston of diesel engine |
| CN204060959U (en) * | 2014-06-30 | 2014-12-31 | 泰州市优力克机械制造有限公司 | Wear-resitsting pistons |
-
2014
- 2014-06-30 CN CN201410303412.2A patent/CN104179590A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4691622A (en) * | 1984-10-10 | 1987-09-08 | Metallgesellschaft Aktiengesellschaft | Light alloy piston |
| US4903580A (en) * | 1985-04-12 | 1990-02-27 | Borgo-Nova Spa | Piston for alternative endothermic engines creating oil cushion lubrication |
| CN201025151Y (en) * | 2007-05-22 | 2008-02-20 | 郑庆和 | Piston |
| CN101929404A (en) * | 2009-06-27 | 2010-12-29 | 铜陵精恒机械有限责任公司 | Piston with steel top and aluminum skirt for 230SG type gas engine |
| CN201439731U (en) * | 2009-07-29 | 2010-04-21 | 中国北车集团大同电力机车有限责任公司 | Diesel engine steel-top iron-skirt combination piston |
| CN101846013A (en) * | 2010-05-25 | 2010-09-29 | 浙江博瑞车业有限公司 | Piston |
| CN203296951U (en) * | 2013-06-21 | 2013-11-20 | 常州常发动力机械有限公司 | Piston of diesel engine |
| CN204060959U (en) * | 2014-06-30 | 2014-12-31 | 泰州市优力克机械制造有限公司 | Wear-resitsting pistons |
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Legal Events
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141203 |
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| RJ01 | Rejection of invention patent application after publication |