CN210977702U - Steel piston of gasoline engine - Google Patents
Steel piston of gasoline engine Download PDFInfo
- Publication number
- CN210977702U CN210977702U CN201922104333.XU CN201922104333U CN210977702U CN 210977702 U CN210977702 U CN 210977702U CN 201922104333 U CN201922104333 U CN 201922104333U CN 210977702 U CN210977702 U CN 210977702U
- Authority
- CN
- China
- Prior art keywords
- hole
- pin hole
- lubricating oil
- piston
- oil supply
- 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.)
- Active
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a gasoline engine steel piston, including the steel piston body, the embedded head cooling chamber that has in upper portion of steel piston body, be equipped with pinhole cooling chamber being close to piston pin hole position, head cooling chamber and pinhole cooling chamber intercommunication, the steel piston body is equipped with the inlet port in the corresponding department of engine organism fuel sprayer mounted position, at the inlet port opposite side, piston center line position department is equipped with the oil outlet, the inlet port all communicates with head cooling chamber with the oil outlet, the fuel sprayer of oil pump passes through the pipeline intercommunication, the oil pump is connected with engine power output end, machine oil passes through the inlet port and gets into cooling oil pocket and pinhole cooling chamber, high temperature oil after head cooling chamber and pinhole cooling chamber absorbed heat flows from the oil outlet. The utility model discloses can satisfy the operation requirement of high detonation pressure of gasoline engine, high power density, high reliability and durability, solve the not enough problem of casting aluminium-silicon alloy high temperature fatigue strength.
Description
Technical Field
The utility model relates to a technical field is made to the internal-combustion engine piston, concretely relates to gasoline engine steel piston.
Background
In the prior art, a cast aluminum-silicon alloy piston is used, a piston body is made of aluminum-silicon alloy, the strength of the body is limited to a certain degree, particularly, after the temperature reaches 300 ℃, the fatigue strength of the material is reduced rapidly, the cooling capacity in the piston is insufficient, the temperature of the head and the pin hole of the piston is high, and the head is cracked, and the pin hole is occluded and cracked after the engine is overloaded. Meanwhile, the traditional piston of the gasoline engine is formed by casting, the highest explosion pressure and power density of the gasoline engine are continuously improved along with the upgrading of emission and the upgrading of engine transformation, the piston load is continuously increased, the temperature of the piston is correspondingly increased after the engine load is increased, and the traditional aluminum-silicon alloy piston cannot meet the requirements of the reliability and durability of the engine after the fatigue property of the material is reduced.
In addition, in order to increase the reliability and durability of the engine in the prior art, a method of adding an external measure to forcibly cool the piston is adopted in the prior art so as to reduce the surface temperature of the piston. The existing piston cooling modes comprise two cooling modes, one is that a cooling oil cavity is cast inside, the other is that oil spraying cooling is directly carried out on the piston, but the traditional cooling mode only cools the head part of the piston due to the limitation of the size, the shape and the position of the cooling oil cavity and the forming mode, the cooling of the pin hole part is not considered, along with the increase of the engine load, the cooling capacity cannot meet the requirement, and along with the increase of the mechanical load and the thermal load, the pin hole part of the piston often appears in a lean oil or oil-free state to cause pin hole galling and seizure, and the two cooling modes lead to the fact that the piston cannot meet the requirements of the reliability and the durability of the engine. There is an urgent need to design a new piston structure to meet the above requirements of gasoline engines.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just for overcome the shortcoming that above-mentioned prior art exists, provide a new gasoline engine steel piston, the utility model discloses can satisfy the operation requirement of high detonation pressure of gasoline engine, high power density, high reliability and durability, solve the not enough problem of casting aluminium silicon alloy high temperature fatigue strength.
The utility model provides a technical scheme that its technical problem adopted is:
a gasoline engine steel piston comprises a steel piston body, wherein a head cooling cavity is embedded in the upper part of the steel piston body, a pin hole cooling cavity is arranged at the position close to a piston pin hole, the head cooling cavity is communicated with the pin hole cooling cavity, the head of the piston is cooled through the head cooling cavity, and the pin hole position is cooled through the pin hole cooling cavity; the engine oil pump is connected with the power output end of the engine, the engine oil enters the cooling oil cavity and the pin hole cooling cavity through the oil inlet hole, and high-temperature oil absorbing heat in the head cooling cavity and the pin hole cooling cavity flows out of the oil outlet hole.
The steel piston body still is equipped with lubricating oil supply hole near pinhole inboard position, lubricating oil supply hole and oil outlet position cooperation, and the part high temperature oil that flows from the oil outlet flows through lubricating oil supply hole.
The lubricating oil supply holes comprise a lubricating oil supply hole I, a lubricating oil supply hole II and a lubricating oil supply hole III, the lubricating oil supply hole I and the lubricating oil supply hole III are respectively positioned at two axial sides of the lubricating oil supply hole II, the lubricating oil supply hole I, the lubricating oil supply hole II and the lubricating oil supply hole III are arranged at the axial middle positions of the pin hole I at one side and the pin hole II at the other side, the lubricating oil supply hole I is matched with the pin hole I, the lubricating oil supply hole III is matched with the pin hole II, lubricating oil flows into the pin hole from the lubricating oil supply hole and flows into the pin hole at the other end from the lubricating oil supply hole, the lubricating oil flows into the connecting rod small-end hole from the lubricating oil supply hole, the lubricating oil flowing out from the lubricating oil supply hole flows into the connecting rod small-end hole and the pin hole.
A plurality of pin hole lubricating holes are arranged at the pin hole part of the piston, the pin hole lubricating holes are respectively communicated with the head cooling cavity or the pin hole cooling cavity, and engine oil enters the pin hole from the head cooling cavity or the pin hole cooling cavity through the pin hole lubricating holes to supply pin hole lubricating oil.
The pin hole lubrication holes comprise a pin hole lubrication hole I, a pin hole lubrication hole II, a pin hole lubrication hole III, a pin hole lubrication hole IV, a pin hole lubrication hole V and a pin hole lubrication hole VI, wherein the pin hole lubrication hole I, the pin hole lubrication hole II and the pin hole lubrication hole III are respectively and symmetrically arranged with the pin hole lubrication hole VI, the pin hole lubrication hole V and the pin hole lubrication hole IV by taking an axial vertical plane of the pin hole as a symmetrical plane.
The steel piston body comprises a piston core part and a piston ring part, wherein an axial bulge is arranged on the upper end surface of the piston ring part, a vertical matching surface is formed by an outer cylindrical surface of the axial bulge and an axial inner hole of the piston core part in a sealing matching mode, a horizontal matching surface is formed by the lower end surface of the piston core part and the upper end surface of the piston ring part in a sealing matching mode, a part of a head cooling cavity is arranged on the piston core part, the other part of the head cooling cavity and a pin hole cooling cavity are arranged on the piston ring part, and the piston core part and the piston ring part are formed by connecting.
The matching surface and the matching surface are connected through laser welding and electron beam welding.
The utility model has the advantages that:
1. the utility model discloses piston body intensity is high, can strengthen the inside cooling of piston, and the temperature at piston head and pinhole position obtains effective control, and the lubricating oil at pinhole position can obtain in time compensating, can satisfy the requirement of the high reliability of high load gasoline engine piston. The utility model discloses can utilize and forge the shaping mode, choose high strength structural steel for use to replace aluminium-silicon alloy, piston body intensity improves more than 4 times than traditional piston, solves the not enough problem of casting aluminium-silicon alloy high temperature fatigue strength.
2. The structure of the utility model is provided with cooling cavities in the piston and on both sides of the pin hole, and the volume of the cooling cavity is more than 5 times of that of the cooling oil cavity in the traditional casting and forming mode; by means of the oil inlet and outlet holes, low-temperature cooling oil enters from the oil inlet hole, then high-temperature oil absorbing heat flows out from the oil outlet hole in time, and the arranged cooling oil cavity can cool the head of the piston and can cool the piston pin hole. The problem of piston cooling capacity not enough is solved.
3. The utility model discloses structural arrangement has two pinhole lubricating oil supply holes, and one of them department has arranged three groups of lubricating oil supply holes between cooling oil pocket and piston bore, and machine oil flows out the back from lubricating oil supply hole, and in piston connecting rod microcephaly hole and piston pin hole inboard through the lubrication of splashing flowed in, lubricated connecting rod microcephaly hole and pinhole, solved pinhole interlock problem. And the other part is positioned between the cooling oil cavity and the pin hole, six lubricating oil supply holes are arranged in each end pin hole, and engine oil flows into the upper side of the pin hole from the cooling oil cavity through the lubricating oil supply holes to supply lubrication to the pin hole, so that the problem of poor lubrication of the pin hole is solved, and the problem of insufficient lubrication capability of the pin hole is solved.
Drawings
Fig. 1 is a schematic view of the piston structure of the present invention;
FIG. 2 is a cross-sectional view F-F of FIG. 1 illustrating the structure and connection of the head cooling cavity and the pin bore cooling cavity;
FIG. 3 is a cross-sectional view N-N of FIG. 1 illustrating the configuration and connection of the pin bore lubrication holes;
FIG. 4 is a cross-sectional view taken along line P-P of FIG. 3, illustrating the structural and positional relationships of the piston pin bore, the oil inlet bore, the oil outlet bore, and the lubricant supply bore;
FIG. 5 is a cross-sectional view taken along line K-K of FIG. 1, illustrating the positional relationship of the head cooling cavity, the lubrication oil supply hole, and the connecting rod small end hole;
fig. 6 is a schematic diagram of a split structure of the piston core part and the piston ring part, and illustrates the positions and the matching relationship of the piston core part and the piston ring part.
Shown in the figure: 1 piston core part, 2 piston ring parts, 3 head cooling cavities, 4 piston pin holes, 5 pin hole cooling cavities, 6 oil inlet holes, 7 oil outlet holes, 8 lubricating oil supply holes, 9 connecting rod small end holes and 10 pin hole lubricating holes.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-6, a gasoline engine steel piston comprises a steel piston body, the steel piston body is made of high-strength structural steel, a head cooling cavity 3 is embedded in the upper portion of the steel piston body, a pin hole cooling cavity 5 is arranged at a position close to a piston pin hole 4, the head cooling cavity 3 is communicated with the pin hole cooling cavity 5, the piston head is cooled through the head cooling cavity 3, and the pin hole position is cooled through the pin hole cooling cavity 5.
The oil pump is connected with the power output end of the engine, engine oil enters the cooling oil cavity 3 and the pin hole cooling cavity 5 through the oil inlet 6, and high-temperature oil absorbing heat flows out from the oil outlet 7 and the lubricating oil supply hole 8 after the oscillation cooling is carried out on the head cooling cavity 3 and the pin hole cooling cavity 5.
The steel piston body still is equipped with lubricating oil supply hole 8 near pinhole inboard position, and lubricating oil supply hole 8 and the cooperation of oil outlet 7 position will absorb thermal high temperature oil and flow out through lubricating oil supply hole 8 partly after flowing out from oil outlet 7 after head cooling chamber 3 and pinhole cooling chamber 5 carry out the vibration cooling. The lubricating oil supply holes 8 are provided in plural. Referring to fig. 4 and 5, in the present embodiment, the lubricating oil supply holes include three lubricating oil supply holes I8-1, three lubricating oil supply holes II8-2 and three lubricating oil supply holes III8-3, the lubricating oil supply hole I8-1 and the lubricating oil supply hole III8-3 are respectively located at two axial sides of the lubricating oil supply hole II8-2, the lubricating oil supply hole I8-1, the lubricating oil supply hole II8-2 and the lubricating oil supply hole III8-3 are respectively located at a position axially intermediate between the pin hole I4-1 at one side and the pin hole II4-2 at the other side, wherein the lubricating oil supply hole I8-1 is matched with the pin hole I4-2, the lubricating oil supply hole III8-3 is matched with the pin hole II4-1, and the lubricating oil supply hole II8-2 is matched with the connecting rod small end hole. Lubricating oil flows into the pin hole 4-2 from the lubricating oil supply hole 8-1, flows into the pin hole 4-1 at the other end from the lubricating oil supply hole 8-3, flows into the connecting rod small end hole 9 from the lubricating oil supply hole 8-2, and can flow into the connecting rod small end hole and the pin hole through the lubricating oil supply hole 8, so that lubricating oil compensation is respectively performed on the pin hole and the connecting rod small end hole, and the pin hole and the connecting rod small end hole can be prevented from being occluded. And a plurality of pin hole lubricating holes 10 are arranged at the pin hole part of the piston, and the pin hole lubricating holes 10 are respectively communicated with the head cooling cavity 3 or the pin hole cooling cavity 5 as shown in figure 3. The engine oil enters the pin hole through the pin hole lubrication hole 10 from the head cooling chamber 3 or the pin hole cooling chamber 5, and the pin hole lubrication oil is replenished. In the embodiment, each pin hole lubrication hole 10 is provided with six parts, namely a pin hole lubrication hole I10-1, a pin hole lubrication hole II10-2, a pin hole lubrication hole III10-3, a pin hole lubrication hole IV10-4, a pin hole lubrication hole V10-5 and a pin hole lubrication hole VI10-6, wherein the pin hole lubrication hole I10-1, the pin hole lubrication hole II10-2 and the pin hole lubrication hole III10-3 are respectively and symmetrically arranged with a pin hole lubrication hole VI10-6, a pin hole lubrication hole V10-5 and a pin hole lubrication hole IV10-4 by taking an axial vertical plane of a pin hole as a symmetrical plane.
The steel piston body comprises a piston core part 1 and a piston ring part 2, see fig. 5 and fig. 6, an upper end surface 21 of the piston ring part 2 is provided with an axial protrusion 22, an outer cylindrical surface of the axial protrusion 22 is in sealing fit with an axial inner hole 11 of the piston core part 1 to form a vertical matching surface a, a lower end surface 12 of the piston core part 1 is in sealing fit with the upper end surface 21 of the piston ring part 2 to form a horizontal matching surface b, a part of a head cooling cavity 3 is arranged on the piston core part 1, the other part of the head cooling cavity 3 and a pin hole cooling cavity 5 are arranged on the piston ring part 2, and the piston core part 1 and the piston ring part 2 are formed by sealing connection of.
The matching surface a and the matching surface b are connected by laser welding, electron beam welding and the like.
The utility model discloses during the manufacturing, can forge piston core blank and piston ring portion blank earlier, piston core cooling chamber and piston ring portion cooling chamber are processed respectively according to the shaping shape, utilize the drilling machine to process piston pin hole cooling chamber 5, process pinhole semi-manufactured goods and lubricating oil supply hole 10 afterwards, process lubricating oil supply hole 8, connect into a whole with piston core and piston ring portion through welding mode with vertical fitting surface an and horizontal fitting surface b, piston core cooling chamber and the synthetic head cooling chamber 3 in piston ring portion cooling chamber.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Claims (7)
1. A gasoline engine steel piston comprises a steel piston body and is characterized in that a head cooling cavity is embedded in the upper portion of the steel piston body, a pin hole cooling cavity is arranged at a position close to a pin hole of the piston, the head cooling cavity is communicated with the pin hole cooling cavity, the head of the piston is cooled through the head cooling cavity, and the pin hole position is cooled through the pin hole cooling cavity; the engine oil pump is connected with the power output end of the engine, the engine oil enters the cooling oil cavity and the pin hole cooling cavity through the oil inlet hole, and high-temperature oil absorbing heat in the head cooling cavity and the pin hole cooling cavity flows out of the oil outlet hole.
2. The steel piston of gasoline engine as defined in claim 1, wherein the steel piston body is further provided with a lubricating oil supply hole near the inner side of the pin hole, the lubricating oil supply hole is matched with the oil outlet hole, and part of the high temperature oil flowing out from the oil outlet hole flows out through the lubricating oil supply hole.
3. The steel piston of the gasoline engine as claimed in claim 2, wherein the lubricating oil supply holes comprise a lubricating oil supply hole I, a lubricating oil supply hole II and a lubricating oil supply hole III, the lubricating oil supply hole I and the lubricating oil supply hole III are respectively positioned at two axial sides of the lubricating oil supply hole II, the lubricating oil supply hole I, the lubricating oil supply hole II and the lubricating oil supply hole III are respectively positioned at the axial middle position between the pin hole I at one side and the pin hole II at the other side, lubricating oil flows into the pin hole from the lubricating oil supply hole, flows into the pin hole at the other end from the lubricating oil supply hole, flows into the small end hole of the connecting rod from the lubricating oil supply hole, and flows into the small end hole of the connecting rod and the pin hole through the lubricating oil flowing out from the lubricating oil supply hole, so that lubricating oil compensation is performed on the pin hole and the small end hole of the connecting rod respectively.
4. The steel piston of the gasoline engine as claimed in claim 3, wherein the pin hole part is provided with a plurality of pin hole lubrication holes, the pin hole lubrication holes are respectively communicated with the head cooling cavity or the pin hole cooling cavity, and engine oil enters the pin hole from the head cooling cavity or the pin hole cooling cavity through the pin hole lubrication holes to replenish pin hole lubrication oil.
5. The steel piston of the gasoline engine as defined in claim 4, wherein the pin hole lubrication holes comprise a pin hole lubrication hole I, a pin hole lubrication hole II, a pin hole lubrication hole III, a pin hole lubrication hole IV, a pin hole lubrication hole V and a pin hole lubrication hole VI, and the pin hole lubrication hole I, the pin hole lubrication hole II and the pin hole lubrication hole III are respectively arranged symmetrically with the pin hole lubrication hole VI, the pin hole lubrication hole V and the pin hole lubrication hole IV with an axial vertical plane of the pin hole as a symmetrical plane.
6. The steel piston of the gasoline engine as claimed in claim 5, wherein the steel piston body comprises a piston core part and a piston ring part, the upper end face of the piston ring part is provided with an axial protrusion, the outer cylindrical surface of the axial protrusion is in sealing fit with the axial inner hole of the piston core part to form a vertical matching surface, the lower end face of the piston core part is in sealing fit with the upper end face of the piston ring part to form a horizontal matching surface, the piston core part is provided with one part of a head cooling cavity, the piston ring part is provided with the other part of the head cooling cavity and a pin hole cooling cavity, and the piston core part and the piston ring part are formed in a sealing connection mode through the.
7. The gasoline engine steel piston as claimed in claim 6, wherein the matching surfaces are connected by laser welding or electron beam welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104333.XU CN210977702U (en) | 2019-11-29 | 2019-11-29 | Steel piston of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922104333.XU CN210977702U (en) | 2019-11-29 | 2019-11-29 | Steel piston of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210977702U true CN210977702U (en) | 2020-07-10 |
Family
ID=71424475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922104333.XU Active CN210977702U (en) | 2019-11-29 | 2019-11-29 | Steel piston of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210977702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748434A (en) * | 2019-11-29 | 2020-02-04 | 滨州渤海活塞有限公司 | Steel piston of gasoline engine and manufacturing method thereof |
-
2019
- 2019-11-29 CN CN201922104333.XU patent/CN210977702U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748434A (en) * | 2019-11-29 | 2020-02-04 | 滨州渤海活塞有限公司 | Steel piston of gasoline engine and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10450999B2 (en) | Reduced compression height dual gallery piston, piston assembly therewith and methods of construction thereof | |
| KR100955741B1 (en) | A piston for diesel engines | |
| US20070079775A1 (en) | Welding Forged Steel Single Piece Piston and Its Manufacturing Methods | |
| CN103827472A (en) | Piston for internal combustion engine | |
| KR102008165B1 (en) | Piston pin for heat dissipation | |
| CN104153909A (en) | Intensive-cooling steel piston of gas engine | |
| CN210977702U (en) | Steel piston of gasoline engine | |
| CN102536494A (en) | Cooling water jacket structure of diesel engine cylinder body | |
| CN204163871U (en) | The strong cooling steel piston of a kind of gas engine | |
| CN110748434A (en) | Steel piston of gasoline engine and manufacturing method thereof | |
| CN113187618B (en) | Integrative aluminium piston cools in lightweight | |
| CN201187358Y (en) | Forged steel integrated piston made by laser welding with closed internal cooling oil cavity | |
| CN202789179U (en) | Cooling system of combustion motor piston | |
| CN111287857B (en) | Method for manufacturing engine cylinder block | |
| CN213980983U (en) | Large-cylinder-diameter integral forged steel piston | |
| CN213743709U (en) | Piston, engine and vehicle | |
| CN113309627B (en) | Novel integral aluminum piston assembly for internal combustion engine | |
| CN201110231Y (en) | Integral marine engine piston | |
| CN217270512U (en) | Diesel engine aluminum piston for strengthening throat cooling of combustion chamber | |
| CN213655000U (en) | Steel piston with enhanced cooling | |
| CN219691973U (en) | Connecting rod of internal combustion engine, internal combustion engine and vehicle | |
| CN205089470U (en) | Effective lubricated ladder small -end of connecting rod's piston structure | |
| CN219711682U (en) | Cooling ring cavity structure of diesel engine piston | |
| CN219366177U (en) | Piston, engine and vehicle | |
| CN112610351A (en) | Piston structure for strengthening cooling of annular groove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |