CN207018101U - A kind of Combined piston structure - Google Patents
A kind of Combined piston structure Download PDFInfo
- Publication number
- CN207018101U CN207018101U CN201720969985.8U CN201720969985U CN207018101U CN 207018101 U CN207018101 U CN 207018101U CN 201720969985 U CN201720969985 U CN 201720969985U CN 207018101 U CN207018101 U CN 207018101U
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- piston
- head
- piston head
- connecting pole
- annular groove
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
A kind of Combined piston structure, including piston top and piston head, the upper center position of the piston head is provided with internal thread mounting hole, the lower central position of the piston top is provided with the external screw thread connecting pole to match with internal thread, the piston top is arranged on by the connecting pole in the mounting hole of the piston head, multiple second die cavities are additionally provided with the outside of the lower section connecting pole of the piston top, second die cavity is connected by the first die cavity of piston head with lubricant reservoir, thread connecting mode is used between piston top and piston head, inside is provided with die cavity and ensures that lubricating oil can be cooled down in time.The intensity of piston is can guarantee that while fast assembling-disassembling, can also reduce inertia force during reciprocating motion of the pistons.
Description
Technical field
A kind of Combined piston structure is the utility model is related to, goes for compression ignition engine.
Background technology
Piston is the core component of engine, and working condition is severe, is worked at high temperature under high pressure for a long time, is moved back and forth at a high speed
When the complete machine oscillation of engine is had a great influence, especially on aviation piston engine, to its reliability, vibratility requirement extremely
Harshness, its intensity and reciprocal inertia force are paid close attention to by research staff.In current aviation gasoline piston engine, largely make
It is integral aluminum alloy flat-head piston, reduces endotherm area, reduce piston reciprocating inertia force, mitigates piston weight, lifting
Engine power to weight ratio, but on piston Heavy End Aviation Fuel engine, because in-cylinder combustion temperature and pressure is significantly raised, gaseous mixture
Formed and combustion requirements top land uses pit type, common aluminum alloy material can not meet high temperature requirement, traditional cast iron
Though piston meets the needs of HTHP, the weight reduction power to weight ratio of engine can be greatly increased, at the same it is larger reciprocal used
Property power adds the vibration of engine.
The content of the invention：
Technical purpose of the present utility model is that quality, high temperature high voltage resistant, reciprocal inertia can effectively be reduced by providing one kind
Power is small, the Combined piston structure of fast assembling-disassembling can be achieved, and can meet the needs of compression ignition diesel engine.
A kind of Combined piston structure, including piston top and piston head, the upper center position of the piston head is provided with interior
Threaded mounting hole, the lower central position of the piston top are provided with the external screw thread connecting pole to match with internal thread, the piston
Top is arranged on by the connecting pole in the mounting hole of the piston head, is additionally provided with the outside of the lower section connecting pole of the piston top
Multiple second die cavities, second die cavity are connected by the first die cavity of piston head with lubricant reservoir.Using said structure, piston
Top and piston head are fabricated structure, thereby may be ensured that in-cylinder combustion temperature and pressure, while maintain engine weight closing
In the range of reason, suitable for Heavy End Aviation Fuel engine, and piston top and piston head are using threaded connection, on the one hand, so that piston
Top and piston head easy installation and removal so that replacing piston top is very convenient after combustor damage, but also can reduce piston
Inertia force during reciprocating motion, on the other hand, piston top lower surface are downwardly protrude to form connecting pole, can so ensure part
In the case of thickness and intensity so that one is formed under piston top compared with the first die cavity, so when engine works, internal lubrication
Oil stream amount is bigger, takes away that calory burning is more, and lubricant effect is more preferable.
The piston top upper surface is provided with groove, and groove and the cylinder head of the piston top upper surface cooperatively form burning
Room.
The lower section of the piston head is piston skirt, and the piston skirt outer wall is provided with twice annular groove, installed in the annular groove
There is the piston ring that lubricating oil on cylinder wall is attached to for striking off, the lower section of the piston skirt, which is provided with, is easy to piston ring will be attached to
Multiple holes that lubricating oil on cylinder wall is quickly discharged.Piston ring on piston skirt is mainly used in striking off on the cylinder wall of attachment
Lubricating oil, piston skirt are provided with hole, the lubrication that can quickly will be attached on cylinder wall in order to the piston ring of piston skirt
Oily quick discharge.
Twice annular groove also is provided with the upper outer wall of the piston head, piston ring is installed in the annular groove.On piston head
Piston ring mainly prevent the gases at high pressure in combustion chamber from scurrying into crankcase.
In summary, the utility model screwing so as to ensure between piston crown and top land by internal and external threads
Connection.For the second die cavity having between piston head and piston top when engine works, there is lubricating oil process inside, takes away burning production
Raw heat, while lubricate internal piston.Piston top is provided with annular groove, for preventing the gases at high pressure in combustion chamber from scurrying into bent axle
Case, twice annular groove is designed in piston skirt, for striking off the lubricating oil on the cylinder wall of attachment, piston skirt is provided with hole, with
The lubricating oil that being easy to the piston ring of piston skirt can quickly will be attached on cylinder wall is quickly discharged.
Brief description of the drawings
Fig. 1 is the structure sectional view of the present apparatus.
Fig. 2 is the structural representation of present apparatus piston top.
Fig. 3 is the chock plug of the present apparatus and the structural representation of piston skirt.
Embodiment
With reference to accompanying drawing, the utility model is described in more detail.
As shown in Figure 1 to Figure 3, a kind of built-up piston, is formed using two parts, and piston top 1 is made of high strength steel,
Piston head 5 and piston skirt 6 are formed using aluminium alloy, are connected between piston top 1 and piston head 5 using internal thread 14 and external screw thread 12
Form.The internal thread 14 by the external screw thread 12 of piston top 1 and piston head 5 is only needed to screw during assembling, it is possible to achieve quick
Dismounting, and reach good fastening effect
The second die cavity 4 between piston top 1 and piston head 5 is connected by oilhole 13 and the first die cavity 3 inside piston head 5
Connect, form a loop, lubricating oil enters the second die cavity 4 by the first die cavity 3, heat caused by combustion chamber 2 is taken away, reached
To the purpose of cooling piston.
There is the 4th annular groove 11 on top land 1, for ring installation, the gas of HTHP is altered when being burnt for prevention
Enter to crankcase, have the 3rd annular groove 10 on piston crown 5, piston ring, function and the 4th annular groove 11 are also installed, are primarily due to
Gaseous-pressure is high in combustion chamber when heavy fuel burning engine works, and one of annular groove can not prevent gases at high pressure from scurrying into crankcase, it is necessary to two
Road.
There are the first annular groove 8 and the twice annular groove of the second annular groove 9 on piston skirt 6, for ring installation, struck off in running
The lubricating oil being attached on cylinder wall.Hole 7 arranged at the bottom of piston skirt, and during crankshaft operation, lubricating oil can be splashed to cylinder wall by hole 7
On, reach the purpose between lubrication piston and casing wall.
Claims (4)
1. a kind of Combined piston structure, including piston top and piston head, it is characterised in that：The upper center position of the piston head
Internal thread mounting hole has been installed, the lower central position of the piston top is provided with the external screw thread connecting pole to match with internal thread,
The piston top is arranged on by the connecting pole in the mounting hole of the piston head, outside the lower section connecting pole of the piston top
Side is additionally provided with multiple second die cavities, and second die cavity is connected by the first die cavity of piston head with lubricant reservoir.
2. Combined piston structure according to claim 1, it is characterised in that：The piston top upper surface is provided with groove,
The groove of the piston top upper surface cooperatively forms combustion chamber with cylinder head.
3. Combined piston structure according to claim 1 or 2, it is characterised in that：The lower section of the piston head is piston
Skirt, the piston skirt outer wall are provided with twice annular groove, are provided with the annular groove and are attached to lubricating oil on cylinder wall for striking off
Piston ring, the lower section of the piston skirt be provided with the lubricating oil for being easy to piston ring to will be attached on cylinder wall quickly discharge it is multiple
Hole.
4. Combined piston structure according to claim 3, it is characterised in that：Also set in the upper outer wall of the piston head
There is twice annular groove, piston ring is installed in the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720969985.8U CN207018101U (en) | 2017-08-04 | 2017-08-04 | A kind of Combined piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720969985.8U CN207018101U (en) | 2017-08-04 | 2017-08-04 | A kind of Combined piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207018101U true CN207018101U (en) | 2018-02-16 |
Family
ID=61477775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720969985.8U Active CN207018101U (en) | 2017-08-04 | 2017-08-04 | A kind of Combined piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207018101U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943475A (en) * | 2021-02-05 | 2021-06-11 | 浙江吉利控股集团有限公司 | Piston structure and engine |
| CN113431698A (en) * | 2020-03-23 | 2021-09-24 | 强莉莉 | Split combined type heat insulation piston |
| 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 |
-
2017
- 2017-08-04 CN CN201720969985.8U patent/CN207018101U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431698A (en) * | 2020-03-23 | 2021-09-24 | 强莉莉 | Split combined type heat insulation piston |
| CN112943475A (en) * | 2021-02-05 | 2021-06-11 | 浙江吉利控股集团有限公司 | Piston structure and engine |
| 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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