CN202493354U - Diesel engine piston cooling structure - Google Patents
Diesel engine piston cooling structure Download PDFInfo
- Publication number
- CN202493354U CN202493354U CN2011205593965U CN201120559396U CN202493354U CN 202493354 U CN202493354 U CN 202493354U CN 2011205593965 U CN2011205593965 U CN 2011205593965U CN 201120559396 U CN201120559396 U CN 201120559396U CN 202493354 U CN202493354 U CN 202493354U
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- China
- Prior art keywords
- piston
- stainless steel
- cold oil
- oil road
- diesel engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 25
- 239000010935 stainless steel Substances 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims description 16
- 230000001788 irregular Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 50
- 238000005266 casting Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000010721 machine oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 150000003839 salts Chemical group 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001584775 Tunga penetrans Species 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model provides a diesel engine piston cooling structure. In the piston casting, a thin-wall stainless steel pipe is taken as an inner cooling channel, and stainless steel strips are taken as supports. The stainless steel pipe and a wear resistant inserting ring are welded into one body via the stainless steel strips, and in the piston casting, the stainless steel pipe and the wear resistant inserting ring are aluminized together, and then are poured into the head of a piston, so the head of the piston forms an annular pipeline, and when an engine operates at a high speed, the tremendous heat generated by the cylinder friction and the fuel oil combustion in a combustion chamber can be taken away by a cooling lubricating oil moving in an oil ring in a cavity of the piston, and consequently the piston performance reduction caused by the high heat load is solved, and at the same time, the sealing performance reduction of a piston ring caused by the high temperature is prevented, so the waste gas entering into a crank box is reduced, and consequently the emission performance of a diesel engine is improved, the defect in the conventional cooling oil channel forming technology is solved, and the low cooling efficiency problem is solved, and the service lifetime of the piston is prolonged, and the discharge reduction is realized.
Description
Technical field
The utility model relates to a kind of diesel engine piston cooling structure, belongs to mechanical manufacturing field.
Background technique
Along with diesel engine constantly to high pressure-charging, high power density, the development of high rotary speed direction, piston is as motor one of the part that mainly is heated, and its performance, reliability and life-span have also been proposed increasingly high requirement.Piston crown directly contacts with high-temperature fuel gas, and it is big and the characteristics of radiating condition difference have caused it when work, need bear sizable heat load to have hot area.Will cause the piston reduction in strength yet heat load is too high, localized hyperthermia also causes the piston head hot tearing easily, piston ring sticking, consequence such as stuck.
At present, the homemade piston product specification of China is lower, and mid-to high-end product relies on import basically.How the combination property such as high temperature resistant, wear-resisting and anti-corrosion of jigger lifting piston has become the common proposition of industry.In order to satisfy the requirement that piston bears the higher thermal load, need on piston, to take some cooling methods, improve the working life of piston with this.
Usually the piston crown cooling has methods for cooling such as the oil spout of inner chamber top, coiler, interior cold oil road.There is very significantly cooling effect in interior cold oil road than inner chamber top oil spout cooling, and the piston-top surface in cold oil road can reduce by 10 ℃ than inner chamber top oil spout cooling piston end face in equivalent environment adopted down, and the mode that heat distributes also has than about-face.Domestic most employing salt core casting method in interior cold oil road, the placement of salt core, location difficulty, careless slightly salt core will rupture or occur the positional deviation problem; Part enterprise then adopt copper tube do in the cold oil road, but cost is high, manufacturing efficiency is low, the waste water and gas befouling environment that produces in the corrosion process.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the utility model provides a kind of cooling structure that can effectively reduce the diesel engine piston heat load.
The technological scheme of the utility model is following: when cast pistons, with stainless steel row culture support, weld together thin-wall stainless steel and abrasion-proof inserted ring; Form an integral body, when the casting piston, with they together aluminisings; Together be cast into piston crown, make piston crown form a looped pipeline, promptly interior cold oil road; The center that is centered close to piston in wherein interior cold oil road, an end in interior cold oil road is communicated with interior cold oil road filler opening, and the filler opening below is provided with the nozzle that is communicated with the diesel-engine body main oil gallery; The filler opening of nozzle communicates with the diesel-engine body main oil gallery, and the oil outlet of nozzle is over against filler opening, and the other end in interior cold oil road is communicated with interior cold oil road oil outlet; Wherein filler opening and oil outlet are symmetric arrangement, and on interior cold oil road, are provided with drain tap, and motor is when running up like this; The huge heat that cylinder friction and firing chamber detonation are produced just can be taken away through the cooling and lubricating fluid that moves in the piston cavity oil ring, thereby improves the problem of the piston decreased performance that causes because of heat load; The exhausted air quantity that reduces Yin Gaowen to cause the piston ring packing decreased performance simultaneously and reveal is to reach the purpose that improves piston working life and reduction discharging.The advantage of this method is: thin-wall steel tube is not yielding, and stainless steel is pollution-free, and cost is lower, unlike the same easy-rupturing of salt core, makes manufacturing efficiency greatly improve yet.Cooling plays crucial effects because the main structure parameters of thin-wall stainless steel is to piston; Therefore this programme has been done detailed optimization to its sectional shape and position, guarantees that it can effectively reduce the temperature of piston combustion bowl and position, first annular groove bottom, effectively prevents the adhesion of annular groove; Make first annular groove adopt the better rectangular ring of sealing to become possibility simultaneously; Improved the operating conditions of piston ring, reduced engine motor oil consumption and discharging, the motor combination property is significantly improved.
Description of drawings
Fig. 1 is the plan view of piston cooling structure;
Fig. 2 is the worm's eye view of piston cooling structure;
Fig. 3 .1 is the A-A sectional view of piston cooling structure among Fig. 1;
Fig. 3 .2 is the partial enlarged drawing of the A-A sectional view of piston cooling structure among Fig. 3 .1;
Fig. 4 is the B-B sectional view of piston cooling structure among Fig. 1;
Fig. 5 is the C-C sectional view of piston cooling structure among Fig. 2;
Fig. 6 is the D-D sectional view of piston cooling structure among Fig. 2;
Fig. 7 is the welding schematic representation of piston cooling structure and abrasion-proof inserted ring;
Fig. 8 is the thin-wall stainless steel sectional view of piston cooling structure;
1 is cold oil road filler opening in the piston among the figure, and 2 is cold oil road in the piston, and 3 is cold oil road oil outlet in the piston, and 4 is piston, and 5 is cold oil road drain tap in the piston, and 6 is thin-wall stainless steel, and 7 is stainless steel strip, and 8 is abrasion-proof inserted ring.
Embodiment
Fig. 1-6 shows the engine piston cooling structure, because motor is in when work, fuel oil is very high in the combustion chambers burn temperature; It is very big that piston head bears atmospheric pressure; The heat that burning produces is sucked by piston head, has caused piston crown and piston ring to have higher heat load, therefore needs at piston head cooling structure to be set; This structure comprises cold oil road 2 in the thin-wall stainless steel, the filler opening 1 and oil outlet 3 and quick drain tap 5 that are arranged on the inside of piston 4 and communicate with interior cold oil road 2.Piston 4 centers that are centered close in interior cold oil road 2 and filler opening 1 are symmetric arrangement with oil outlet 3.
The cooling of piston mainly leans on machine oil mobile heat that absorbs oil inflame in oil duct to come piston is cooled off; Therefore below the filler opening 1 in interior cold oil road 2, be provided with the nozzle that is communicated with the body main oil gallery; The nozzle filler opening communicates with the body main oil gallery, and the nozzle oil outlet is over against the oil inlet hole 1 of oil duct, during engine operation; Machine oil through main oil gallery through nozzle ejection cold oil road 2 in oil duct filler opening 1 and in flowing into; From oil outlet 3, flow out, finally flow back to oil sump, the heat of piston head just is absorbed through the machine oil that flows and takes away like this.In addition, also be provided with the inclined hole that is communicated with interior cold oil road 2 in piston 4 bottoms, promptly the draining hole 5; Inclined hole can be discharged the machine oil in the interior cold oil road fast; Reduce the piston crown temperature, reduce piston crown and piston ring groove sintering phenomenon, improve piston integrated usability.
As shown in Figure 7, when cast pistons, make support with stainless steel strip 7, weld together thin-wall stainless steel 6 and abrasion-proof inserted ring 8, form an integral body.The position in interior cold oil road with and main structure parameters very big to piston cooling effect influence, therefore need carry out detailed optimization to it.As shown in Figure 8, the cross section of Stainless Steel Tube is irregular ellipse, and its major parameter is a=12～18mm, Rb=2～6mm, Rc=4～8mm, Rd=4～8mm, Re=2～4mm.Can form turbulent flow preferably when machine oil moves like this in interior cold oil road 2, thereby take away more heats.When piston diameter is 110～130mm simultaneously; the top of thin-wall stainless steel 6 is 20～30mm apart from piston 4 tops; the internal diameter of thin-wall stainless steel 6 is got 75～80mm, and the wall thickness of thin-wall stainless steel 6 is 0.5～1.0mm, and thin-wall stainless steel reasonably is arranged between firing chamber and the annular groove; make piston first annular groove, firing chamber time mouth, bottom, firing chamber all obtain good cooling, can guarantee the requirement of piston structure intensity simultaneously.
Claims (4)
1. diesel engine piston cooling structure; It is characterized in that, cold oil road (2) in comprising, said interior cold oil road (2) is formed on the inside of piston (4); The center that is centered close to piston (4) in cold oil road (2) in said; An end in cold oil road (2) is communicated with interior cold oil road filler opening (1) in said, and said interior cold oil road filler opening (1) below is provided with the nozzle that is communicated with the diesel-engine body main oil gallery, and the filler opening of said nozzle communicates with the diesel-engine body main oil gallery; The oil outlet of said nozzle is over against said interior cold oil road filler opening (1); The other end in cold oil road (2) is communicated with interior cold oil road oil outlet (3) in said, and wherein said interior cold oil road filler opening (1) is symmetric arrangement with said interior cold oil road oil outlet (3), and in said, is provided with drain tap (5) on cold oil road (2).
2. diesel engine piston cooling structure as claimed in claim 1 is characterized in that, said interior cold oil road (2) is to be welded together to form the looped pipeline at piston crown by thin-wall stainless steel (6) through stainless steel strip (7) and abrasion-proof inserted ring (8).
3. diesel engine piston cooling structure as claimed in claim 2; It is characterized in that; When piston diameter is 110～130mm; The internal diameter of said thin-wall stainless steel (6) is 75～80mm, and wall thickness is 0.5～1.0mm, and the top of said thin-wall stainless steel (6) is 20～30mm apart from the distance at said piston (4) top.
4. diesel engine piston cooling structure as claimed in claim 2 is characterized in that, the cross section of said thin-wall stainless steel is irregular ellipse, and its major parameter is: a=12～18mm, Rb=2～6mm, Rc=4～8mm, Rd=4～8mm, Re=2～4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205593965U CN202493354U (en) | 2011-12-29 | 2011-12-29 | Diesel engine piston cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205593965U CN202493354U (en) | 2011-12-29 | 2011-12-29 | Diesel engine piston cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202493354U true CN202493354U (en) | 2012-10-17 |
Family
ID=46999586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205593965U Expired - Fee Related CN202493354U (en) | 2011-12-29 | 2011-12-29 | Diesel engine piston cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202493354U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017102252A1 (en) * | 2015-12-18 | 2017-06-22 | Mahle International Gmbh | Piston for an internal combustion eingine |
| CN110935848A (en) * | 2019-12-13 | 2020-03-31 | 广州扶商缸套有限公司 | Inner cooling oil duct of aluminum alloy piston |
| CN111133186A (en) * | 2017-08-23 | 2020-05-08 | 天纳克有限责任公司 | Piston with wide oval channel |
-
2011
- 2011-12-29 CN CN2011205593965U patent/CN202493354U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017102252A1 (en) * | 2015-12-18 | 2017-06-22 | Mahle International Gmbh | Piston for an internal combustion eingine |
| CN111133186A (en) * | 2017-08-23 | 2020-05-08 | 天纳克有限责任公司 | Piston with wide oval channel |
| CN111133186B (en) * | 2017-08-23 | 2022-07-01 | 天纳克有限责任公司 | Piston with wide oval channel |
| CN110935848A (en) * | 2019-12-13 | 2020-03-31 | 广州扶商缸套有限公司 | Inner cooling oil duct of aluminum alloy piston |
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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 |
Granted publication date: 20121017 Termination date: 20141229 |
|
| EXPY | Termination of patent right or utility model |