CN104390766A - Layered piston heat transfer test apparatus - Google Patents
Layered piston heat transfer test apparatus Download PDFInfo
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- CN104390766A CN104390766A CN201410493174.6A CN201410493174A CN104390766A CN 104390766 A CN104390766 A CN 104390766A CN 201410493174 A CN201410493174 A CN 201410493174A CN 104390766 A CN104390766 A CN 104390766A
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- piston
- ring
- cylinder sleeve
- piston body
- overcoat
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Abstract
The invention relates to a layered piston heat transfer test apparatus. A cylinder sleeve (4) is sleeved by a jacket (2), a water cavity (3) is arranged between the jacket (2) and the cylinder sleeve (4) in an enclosed mode, the contact portions of the upper ends and the lower ends of the cylinder sleeve (4) and the jacket (2) are respectively provided with an O-shaped rubber sealing ring (6) and a rubber ring (18), a piston composed of a piston head (11) and a piston body (17) is installed in the cylinder sleeve (4), the piston head (11) and the piston body (17) are connected through an adjusting pad (12), a gland (7) connects the cylinder sleeve (4) with the jacket (2) in a compacting mode through a bolt (10), a first ring (13) is arranged on the piston body (17), a second ring (14) is arranged on the piston body (17) and is disposed below the first ring (13), an oil ring (15) is arranged on the piston body (17) and is disposed below the second ring (14), oil cavities (16) are arranged inside the piston body (17), and a cooling nozzle (19) is arranged below the oil cavities (16). According to the invention, the piston top height is changed through the adjusting pad, and the heating state and the cooling state of the piston are effectively simulated.
Description
Technical field
The invention belongs to piston heat trnasfer test method technical field, be specifically related to the piston heat trnasfer test unit that research piston top bank height change affects the first annular groove regional temperature, particularly relate to a kind of layer-stepping piston heat trnasfer test unit.
Background technology
First piston ring groove temperature is too high is the main cause occurring piston ring sticking after causing diesel engine long time running, and test finds, when the first annular groove temperature is more than 240 ~ 260 DEG C, and bottom land carbon deposit especially severe.Piston cooling oil chamber can effectively block the hot-fluid being flowed to ring district by piston crown, reduce the temperature in ring district, but in piston development process, due to the impact of combustion-chamber shape, cooling oil chamber can only keep concordant with first ring or slightly low position usually, in this case, piston top bank height becomes the major influence factors of the first annular groove temperature.
Push up choosing and following factors should being considered of bank height: when piston is at upper dead center, the top compression ring in uncooled piston should not exceed jacket-cooling water face; In cooling piston, although heat is taken away primarily of cold oil, due to piston cooling oil chamber position limitation, also top compression ring should be made as far as possible to be no more than jacket-cooling water face, therefore, have good condition of work in order to ensure top compression ring, top bank height can not be too small.Along with engine lightweight and high compact development trend, in order to reduce height and the weight of piston, reduce the harmful gap formed between top bank and cylinder jacket, top bank height requires again to reduce as far as possible.Therefore, need design experiment, research pushes up bank height change to the affecting laws of first piston ring groove temperature, for the design of piston top bank height and chamber structure design provide support.
Summary of the invention
The present invention is exactly the problem affected the first annular groove regional temperature to solve piston top bank height change, and proposes a kind of layer-stepping piston heat trnasfer test unit.
The technical solution used in the present invention: a kind of layer-stepping piston heat trnasfer test unit, it comprises water pipe head 1, overcoat 2, water cavity 3, cylinder sleeve 4, thermopair 5, O shape rubber seal 6, gland 7, infrared thermometer 8, laser instrument 9, bolt 10, piston crown 11, adjustment pad 12, one ring 13, two rings 14, oil ring 15, oil pocket 16, piston body 17, cushion rubber 18 and cooling jet 19, cylinder sleeve 4 is sleeved in overcoat 2, water cavity 3 is arranged with between overcoat 2 and cylinder sleeve 4, cylinder sleeve 4 and overcoat 2 are respectively arranged with O shape rubber seal 6 and cushion rubber 18 in top and bottom contact portion, water pipe head 1 for controlling Inlet and outlet water is connected with overcoat 2, and be communicated with water cavity 3, the piston that piston crown 11 and piston body 17 form is installed in cylinder sleeve 4, be connected by adjusting pad 12 between piston crown 11 with piston body 17, cylinder sleeve 4 compression is connected on overcoat 2 by bolt 10 by gland 7, one ring 13 is arranged on piston body 17, two rings 14 are arranged on piston body 17, be positioned at the below of a ring 13, oil ring 15 is arranged on piston body 17, be positioned at the below of two rings 14, piston body 17 inside is provided with oil pocket 16, cooling jet 19 is provided with below oil pocket 16, the top that gland 7 inside is positioned at piston crown 11 is provided with laser instrument 9, infrared thermometer 8 is provided with above laser instrument 9, a ring 13 is provided with thermopair 5.
The present invention compared with prior art its beneficial effect is: the present invention changes piston top bank height, under effectively simulating piston heating status and the state of cooling, by experimental study piston top bank height change to the affecting laws of annulus region temperature by adjustment pad.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of layer-stepping piston heat trnasfer test unit, it comprises water pipe head 1, overcoat 2, water cavity 3, cylinder sleeve 4, thermopair 5, O shape rubber seal 6, gland 7, infrared thermometer 8, laser instrument 9, bolt 10, piston crown 11, adjustment pad 12, one ring 13, two rings 14, oil ring 15, oil pocket 16, piston body 17, cushion rubber 18 and cooling jet 19, cylinder sleeve 4 is sleeved in overcoat 2, water cavity 3 is arranged with between overcoat 2 and cylinder sleeve 4, cylinder sleeve 4 and overcoat 2 are respectively arranged with O shape rubber seal 6 and cushion rubber 18 in top and bottom contact portion, water pipe head 1 for controlling Inlet and outlet water is connected with overcoat 2, and be communicated with water cavity 3, the piston that piston crown 11 and piston body 17 form is installed in cylinder sleeve 4, be connected by adjusting pad 12 between piston crown 11 with piston body 17, cylinder sleeve 4 compression is connected on overcoat 2 by bolt 10 by gland 7, one ring 13 is arranged on piston body 17, two rings 14 are arranged on piston body 17, be positioned at the below of a ring 13, oil ring 15 is arranged on piston body 17, be positioned at the below of two rings 14, piston body 17 inside is provided with oil pocket 16, cooling jet 19 is provided with below oil pocket 16, the top that gland 7 inside is positioned at piston crown 11 is provided with laser instrument 9, infrared thermometer 8 is provided with above laser instrument 9, a ring 13 is provided with thermopair 5.Wherein, adjustment pad 12 is identical with the material of piston body 17, changes piston tip height by the quantity changing adjustment pad 12, adopts laser instrument 9 to heat piston-top surface, adopt infrared thermometer 8 to monitor piston face temperature, measured the regional temperature of a ring 13 by thermopair 5.
Principle of work: be first fixed on by thermopair 5 on a ring 13, is fixed in cylinder jacket by piston crown 11 and piston body 17, then adjusts the position of laser instrument 9 and the monitored area of infrared thermometer 8, as shown in Figure 1.ON cycle chilled water and cold oil, cool piston body 17; Open the data monitoring software of laser instrument 9, infrared thermometer 8, make piston temperature circulation change between the highest, minimum set temperature, measure ring groove area temperature by thermopair 5 and preserve data.
In test, piston major part heat is taken away by oil pocket 16, and piston crown 11 imports the heat of cylinder sleeve 4 into, is taken away by the chilled water in water cavity 3, and by monitoring the regional temperature Changing Pattern of a ring 13, optimization piston tip height designs.
Claims (1)
1. a layer-stepping piston heat trnasfer test unit, it comprises water pipe head (1), overcoat (2), water cavity (3), cylinder sleeve (4), thermopair (5), O shape rubber seal (6), gland (7), infrared thermometer (8), laser instrument (9), bolt (10), piston crown (11), adjustment pad (12), one ring (13), two rings (14), oil ring (15), oil pocket (16), piston body (17), cushion rubber (18) and cooling jet (19), it is characterized in that: cylinder sleeve (4) is sleeved in overcoat (2), water cavity (3) is arranged with between overcoat (2) and cylinder sleeve (4), cylinder sleeve (4) and overcoat (2) are respectively arranged with O shape rubber seal (6) and cushion rubber (18) in top and bottom contact portion, water pipe head (1) for controlling Inlet and outlet water is connected with overcoat (2), and be communicated with water cavity (3), the piston that piston crown (11) and piston body (17) form is installed in cylinder sleeve (4), be connected by adjusting pad (12) between piston crown (11) with piston body (17), cylinder sleeve (4) compression is connected on overcoat (2) by bolt (10) by gland (7), one ring (13) is arranged on piston body (17), two rings (14) are arranged on piston body (17), be positioned at the below of a ring (13), oil ring (15) is arranged on piston body (17), be positioned at the below of two rings (14), piston body (17) inside is provided with oil pocket (16), oil pocket (16) below is provided with cooling jet (19), the top that gland (7) inside is positioned at piston crown (11) is provided with laser instrument (9), laser instrument (9) top is provided with infrared thermometer (8), a ring (13) is provided with thermopair (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493174.6A CN104390766A (en) | 2014-09-25 | 2014-09-25 | Layered piston heat transfer test apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493174.6A CN104390766A (en) | 2014-09-25 | 2014-09-25 | Layered piston heat transfer test apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104390766A true CN104390766A (en) | 2015-03-04 |
Family
ID=52608699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410493174.6A Pending CN104390766A (en) | 2014-09-25 | 2014-09-25 | Layered piston heat transfer test apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104390766A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576031A (en) * | 2022-01-27 | 2022-06-03 | 东风汽车集团股份有限公司 | Piston and piston head model selection test method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157003A (en) * | 1991-12-04 | 1993-06-22 | Isuzu Motors Ltd | Piston crown |
| US20030167918A1 (en) * | 2002-03-09 | 2003-09-11 | Mahle Gmbh | Multi-part cooled piston for an internal combustion engine |
| CN1955713A (en) * | 2005-10-26 | 2007-05-02 | 中国科学院力学研究所 | Test device and method of laser induced piston heat fatigue |
| CN201723321U (en) * | 2007-10-20 | 2011-01-26 | 马勒国际公司 | Pistons for internal 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 |
| CN103398852A (en) * | 2013-08-01 | 2013-11-20 | 中国北方发动机研究所(天津) | Piston cooling oil testing device and testing method |
| CN103994879A (en) * | 2014-04-18 | 2014-08-20 | 中国北方发动机研究所(天津) | Piston thermal fatigue test apparatus |
-
2014
- 2014-09-25 CN CN201410493174.6A patent/CN104390766A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157003A (en) * | 1991-12-04 | 1993-06-22 | Isuzu Motors Ltd | Piston crown |
| US20030167918A1 (en) * | 2002-03-09 | 2003-09-11 | Mahle Gmbh | Multi-part cooled piston for an internal combustion engine |
| CN1955713A (en) * | 2005-10-26 | 2007-05-02 | 中国科学院力学研究所 | Test device and method of laser induced piston heat fatigue |
| CN201723321U (en) * | 2007-10-20 | 2011-01-26 | 马勒国际公司 | Pistons for internal 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 |
| CN103398852A (en) * | 2013-08-01 | 2013-11-20 | 中国北方发动机研究所(天津) | Piston cooling oil testing device and testing method |
| CN103994879A (en) * | 2014-04-18 | 2014-08-20 | 中国北方发动机研究所(天津) | Piston thermal fatigue test apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 狄建兵 等: ""基于激光加热技术的活塞热负荷试验方法研究"", 《小型内燃机与摩托车》 * |
| 韩闪闪: ""柴油机活塞结构强度和传热的影响因素研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576031A (en) * | 2022-01-27 | 2022-06-03 | 东风汽车集团股份有限公司 | Piston and piston head model selection test method |
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Application publication date: 20150304 |
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