CN107630764A - A kind of NEW TYPE OF COMPOSITE heat insulation structural piston - Google Patents
A kind of NEW TYPE OF COMPOSITE heat insulation structural piston Download PDFInfo
- Publication number
- CN107630764A CN107630764A CN201710681743.3A CN201710681743A CN107630764A CN 107630764 A CN107630764 A CN 107630764A CN 201710681743 A CN201710681743 A CN 201710681743A CN 107630764 A CN107630764 A CN 107630764A
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- China
- Prior art keywords
- piston
- steel top
- aluminium body
- heat insulating
- coated metal
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Abstract
The invention provides a kind of NEW TYPE OF COMPOSITE heat insulation structural piston, including piston steel top, ceramic coated metal heat insulating mattress and aluminium body, the piston steel top, ceramic coated metal heat insulating mattress and aluminium body set gradually and together with being bolted to connection from top to bottom, the ceramic coated metal heat insulating mattress center is provided with through hole, and the center cavity between the piston steel top, metallic insulation pad and aluminium body forms air chamber.Relative to prior art, the present invention has the advantage that：The compound heat-insulation layer of air chamber and the combination of Heat insulation with ceramic coatings pad is provided between piston steel top and aluminium body, heat can be effectively isolated by the thermal insulation layer so that aluminium temperature controls in the reasonable scope, and its mechanical property does not occur significantly to degenerate.
Description
Technical field
The invention belongs to piston technical field, more particularly, to a kind of NEW TYPE OF COMPOSITE heat insulation structural piston.
Background technology
Four-cycle diesel uses cast aluminium piston to realize reduction piston mass more at present, reduces piston reciprocating inertia force
Purpose, but the limiting temperature that cast aluminium piston can bear is relatively low, it is about 420 degree, living as engine combustion pressure constantly raises
Fill in the temperature born constantly to raise, cast aluminium piston has been difficult to bear so high temperature, easily causes piston ablation.
To solve the above problems, typically there are three kinds of approach：
First, using the built-up piston of steel top and aluminum skirt, cooling oil duct is set between piston top and aluminium body, led in the course of work
Crossing machine oil cooling reduces the temperature of piston top and aluminium body, and such structural design and processing is complicated, and overall mass is larger, is not suitable for height
Fast diesel engine；
Second, using steel top and aluminum skirt heat insulation structural, the structure increases metallic insulation pad, piston between piston top and aluminium body
Top uses heat resisting steel, reduces portion of heat transfer of the piston top to aluminium body by metallic insulation pad, so as to reduce aluminium temperature, saves simultaneously
Removed cooling oil duct structure, though such structure piston top can bear higher temperature, metallic insulation pad heat-insulating capability it is limited and
Total quality is larger；
Third, on the basis of overall aluminum piston, heat insulating coat is sprayed in its top surface, to reduce combustion chamber to the heat of piston
Transmit, reduce piston face temperature, but heat insulating coat easily occurs ftracture, come off etc. to ask under the influence of piston thermal deformation
Topic, its integrity problem are still difficult to solve.
The content of the invention
In view of this, the present invention is directed to propose a kind of NEW TYPE OF COMPOSITE heat insulation structural piston, can bear higher temperature
The cooling oil duct structure of complexity is saved simultaneously.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of NEW TYPE OF COMPOSITE heat insulation structural piston, including piston steel top, ceramic coated metal heat insulating mattress and aluminium body, the work
Plug steel top, ceramic coated metal heat insulating mattress and aluminium body set gradually and together with being bolted to connection from top to bottom, described
Ceramic coated metal heat insulating mattress center is provided with through hole, between the piston steel top, ceramic coated metal heat insulating mattress and aluminium body in
Heart cavity forms air chamber.
Further, the ceramic coated metal heat insulating mattress is to form metal sheet surface is ceramic coated, is coated with ceramics
Side contacted with the piston steel top.
Further, the head of the bolt is located in the counterbore on piston steel top, and bolt passes through nut in aluminium body bottom
Fastening, pad is provided between nut and aluminium body.
Further, realized and positioned by alignment pin between piston steel top and the aluminium body.
Further, the side of the aluminium body is provided with multiple annular grooves, and insert is cast into the annular groove of piston steel top.
Relative to prior art, the present invention has the advantage that：
(1) present invention be provided between piston steel top and aluminium body air chamber and Heat insulation with ceramic coatings pad combination answer
Thermal insulation layer is closed, heat can be effectively isolated by the thermal insulation layer so that aluminium temperature controls in the reasonable scope, its mechanical property
Do not occur significantly to degenerate.
(2) compound heat-insulation piston of the present invention reduces design and processing cost without using labyrinths such as cooling oil ducts.This
Outside, due to adding air chamber, piston top quality is directly alleviated, can control built-up piston quality to be no more than whole with size
The 20% of body aluminum piston quality.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the sectional view of NEW TYPE OF COMPOSITE heat insulation structural piston described in the embodiment of the present invention；
Fig. 2 is another sectional view of NEW TYPE OF COMPOSITE heat insulation structural piston described in the embodiment of the present invention.
Description of reference numerals：
Piston steel top 1, ceramic coated metal heat insulating mattress 2, insert 3, aluminium body 4, bolt 5, air chamber 6, pad 7, spiral shell
Mother 8, alignment pin 9.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
NEW TYPE OF COMPOSITE heat insulation structural piston of the embodiment of the present invention, including piston steel top 1, ceramic coated metal heat insulating mattress 2, edge
Circle 3 and aluminium body 4,
The piston steel top 1, ceramic coated metal heat insulating mattress 2 and aluminium body 4 are provided with for the through hole through bolt 5, institute
Piston steel top 1, ceramic coated metal heat insulating mattress 2 and aluminium body 4 is stated to set gradually and be bolted to connection one from top to bottom
Rise；The center of ceramic coated metal heat insulating mattress 2 is provided with very big through hole, by piston steel top 1, ceramic coated metal heat insulating mattress 2
Air chamber 6 is collectively forming with the center cavity of aluminium body 4.
The piston steel top 1, ceramic coated metal heat insulating mattress 2 and aluminium body 4 are connected by 4 bolts 5, wherein 2 bolts 5
Piston major thrust face side is arranged in, another 2 bolts 5 are arranged in secondary thrust face side, and two groups of bolts are face symmetrical structure.
The ceramic coated metal heat insulating mattress 2 is to form metal sheet surface is ceramic coated, be coated with the sides of ceramics with
The piston steel top 1 contacts.
The head of the bolt 5 is located in the counterbore on piston steel top 1, and bolt 5 is fastened in the bottom of aluminium body 4 by nut 8,
Pad 7 is provided between nut 8 and aluminium body 4.
Realized and positioned by alignment pin 9 between the piston steel top 1 and aluminium body 4.
Annular groove and piston pin hole are provided with the aluminium body 4, insert 3 is cast into the first annular groove of aluminium body 4.
Ceramic coated metal heat insulating mattress 2 of the present invention and air chamber 6 form compound heat-insulation layer and are used to obstruct by living
Conduct to the heat of aluminium body 4 on plug steel top 1.
The piston steel top 1 uses high-quality heat resisting steel, can bear higher temperature, effectively avoids because power ascension heat is negative
Piston crown ablation problem caused by lotus increase.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (5)
- A kind of 1. NEW TYPE OF COMPOSITE heat insulation structural piston, it is characterised in that：Including piston steel top, ceramic coated metal heat insulating mattress and aluminium Body,The piston steel top, ceramic coated metal heat insulating mattress and aluminium body set gradually and are bolted to connection from top to bottom Together, the ceramic coated metal heat insulating mattress center is provided with through hole, the piston steel top, ceramic coated metal heat insulating mattress and aluminium body Between center cavity formed air chamber.
- A kind of 2. NEW TYPE OF COMPOSITE heat insulation structural piston according to claim 1, it is characterised in that：The ceramic coated metal Heat insulating mattress is to form metal sheet surface is ceramic coated, and the side for being coated with ceramics contacts with the piston steel top.
- A kind of 3. NEW TYPE OF COMPOSITE heat insulation structural piston according to claim 1, it is characterised in that：The head position of the bolt In in the counterbore on piston steel top, bolt is fastened in aluminium body bottom by nut, and pad is provided between nut and aluminium body.
- A kind of 4. NEW TYPE OF COMPOSITE heat insulation structural piston according to claim 1, it is characterised in that：The piston steel top and aluminium Realized and positioned by alignment pin between body.
- A kind of 5. NEW TYPE OF COMPOSITE heat insulation structural piston according to claim 1, it is characterised in that：The side of the aluminium body is set Multiple annular grooves are equipped with, insert is cast into the annular groove of piston steel top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710681743.3A CN107630764A (en) | 2017-08-10 | 2017-08-10 | A kind of NEW TYPE OF COMPOSITE heat insulation structural piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710681743.3A CN107630764A (en) | 2017-08-10 | 2017-08-10 | A kind of NEW TYPE OF COMPOSITE heat insulation structural piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107630764A true CN107630764A (en) | 2018-01-26 |
Family
ID=61099264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710681743.3A Pending CN107630764A (en) | 2017-08-10 | 2017-08-10 | A kind of NEW TYPE OF COMPOSITE heat insulation structural piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107630764A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469421A (en) * | 2018-05-11 | 2019-11-19 | 强莉莉 | A kind of built-up piston |
| CN111102095A (en) * | 2019-12-20 | 2020-05-05 | 中国北方发动机研究所(天津) | Low heat dissipation composite structure piston |
| CN113250846A (en) * | 2021-06-18 | 2021-08-13 | 中国北方发动机研究所(天津) | Combined high-strength heat insulation structure piston |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4242948A (en) * | 1977-12-16 | 1981-01-06 | Cummins Engine Company, Inc. | Insulated composite piston |
| JPH01318750A (en) * | 1988-06-17 | 1989-12-25 | Isuzu Motors Ltd | Structure of insulated piston |
| JPH0921347A (en) * | 1995-07-06 | 1997-01-21 | Isuzu Ceramics Kenkyusho:Kk | Structure for thermal insulation type engine provided with thermal insulation layer and sound absorbing layer |
| CN2573702Y (en) * | 2002-08-16 | 2003-09-17 | 大连机车研究所 | Improvement on steel top aluminium apron piston for 280/285 series locomotive diesel engine |
| CN101063420A (en) * | 2006-04-28 | 2007-10-31 | 上海晨昌动力科技有限公司 | Biogas engine with hot-cavity heat insulation structural |
| CN102678379A (en) * | 2012-05-25 | 2012-09-19 | 北京理工大学 | Combined piston for highly-intensified reciprocating internal combustion engine |
| CN102925844A (en) * | 2012-11-05 | 2013-02-13 | 天津大学 | Method for improving thermal efficiency of combustion engine |
| CN103091356A (en) * | 2011-10-31 | 2013-05-08 | 中国兵器工业集团第七〇研究所 | Test device for measuring heat insulation degree of piston heat insulation coat |
| CN106194483A (en) * | 2016-07-11 | 2016-12-07 | 潍柴动力股份有限公司 | A kind of insulating piston |
-
2017
- 2017-08-10 CN CN201710681743.3A patent/CN107630764A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4242948A (en) * | 1977-12-16 | 1981-01-06 | Cummins Engine Company, Inc. | Insulated composite piston |
| JPH01318750A (en) * | 1988-06-17 | 1989-12-25 | Isuzu Motors Ltd | Structure of insulated piston |
| JPH0921347A (en) * | 1995-07-06 | 1997-01-21 | Isuzu Ceramics Kenkyusho:Kk | Structure for thermal insulation type engine provided with thermal insulation layer and sound absorbing layer |
| CN2573702Y (en) * | 2002-08-16 | 2003-09-17 | 大连机车研究所 | Improvement on steel top aluminium apron piston for 280/285 series locomotive diesel engine |
| CN101063420A (en) * | 2006-04-28 | 2007-10-31 | 上海晨昌动力科技有限公司 | Biogas engine with hot-cavity heat insulation structural |
| CN103091356A (en) * | 2011-10-31 | 2013-05-08 | 中国兵器工业集团第七〇研究所 | Test device for measuring heat insulation degree of piston heat insulation coat |
| CN102678379A (en) * | 2012-05-25 | 2012-09-19 | 北京理工大学 | Combined piston for highly-intensified reciprocating internal combustion engine |
| CN102925844A (en) * | 2012-11-05 | 2013-02-13 | 天津大学 | Method for improving thermal efficiency of combustion engine |
| CN106194483A (en) * | 2016-07-11 | 2016-12-07 | 潍柴动力股份有限公司 | A kind of insulating piston |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469421A (en) * | 2018-05-11 | 2019-11-19 | 强莉莉 | A kind of built-up piston |
| CN111102095A (en) * | 2019-12-20 | 2020-05-05 | 中国北方发动机研究所(天津) | Low heat dissipation composite structure piston |
| CN113250846A (en) * | 2021-06-18 | 2021-08-13 | 中国北方发动机研究所(天津) | Combined high-strength heat insulation structure piston |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180126 |
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| RJ01 | Rejection of invention patent application after publication |