CN207297188U - Internal combustion engine - Google Patents
Internal combustion engine Download PDFInfo
- Publication number
- CN207297188U CN207297188U CN201721324564.6U CN201721324564U CN207297188U CN 207297188 U CN207297188 U CN 207297188U CN 201721324564 U CN201721324564 U CN 201721324564U CN 207297188 U CN207297188 U CN 207297188U
- Authority
- CN
- China
- Prior art keywords
- oil
- groove
- piston
- return hole
- oil return
- 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
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a kind of internal combustion engine, it, which is included at least, is arranged on three annular grooves that piston crown is used for ring installation, it is characterized in that in upper and lower part and the lower part of adjacent annular groove away from the bottom annular groove in combustion chamber end, oil return hole under the gentle groove of oil return hole is uniformly provided with oil return hole on oil groove, oil groove along the circumferential direction of piston, oil return hole is blind hole under the gentle groove of oil return hole under oil return hole, oil groove on the oil groove, and hole depth exceedes annular groove bottom；The utility model designs drainback passage on piston, eliminates the leakage phenomenon of lubricating oil, reduces oil consumption；Due to that need not process drainback passage on the piston ring, piston ring structure is more compact, quality smaller, can reduce the height of piston ring groove, piston mass can also smaller, therefore, the force-bearing situation of piston is improved, engine work more balances, is reliable, and service life is longer.
Description
Technical field
A kind of internal combustion engine is the utility model is related to, specifically a kind of internal combustion engine, more particularly to one kind in work
The internal combustion engine of drainback passage is provided with beyond the Great Wall.
Background technology
The main function of internal combustion engine is subject to the combustion pressure in cylinder, and this power is passed by piston pin and connecting rod
To bent axle, so as to complete predetermined work.The annular groove of multiple tracks ring installation is machined with piston crown, its effect prevents height
Temperature, high-pressure gas scurry into crankcase from combustion chamber, while prevent machine oil from scurrying into combustion chamber.Piston ring quantity depends on wanting for sealing
Ask, generally using 2~4 compression rings, 1 oil ring, wherein the piston ring away from combustion chamber end is oil ring, other piston rings are gas
Ring.
Piston does the reciprocal variable motion of high speed in cylinder in engine, therefore the dynamic stress that piston is subject to is big, to reduce
Dynamic stress, improves piston service life, should try one's best and mitigate the quality of piston.When high speed piston moves, due to piston ring and annular groove,
There are gap between piston ring and cylinder wall, therefore there are the phenomenon of upward oil leak, cause the loss of engine lubricating oil.To subtract
The loss of few lubricating oil is, it is necessary to improve the air-proof condition between piston ring and cylinder, while reduce the oil in piston ring groove as far as possible
Pressure.There is friction between high-speed motion piston and cylinder, it is necessary to assure have good lubrication between piston and cylinder, reduce friction
Loss, to improve engine efficiency.
The content of the invention
The purpose of this utility model is to provide a kind of internal combustion engine that drainback passage is provided with piston.
The utility model, which adopts the following technical scheme that, realizes its goal of the invention, and a kind of internal combustion engine, it is at least wrapped
Include and be arranged on three annular grooves that piston crown is used for ring installation, on the top away from the bottom annular groove in combustion chamber end
With lower part and the lower part of adjacent annular groove, the gentle groove of oil return hole under oil return hole on oil groove, oil groove is uniformly provided with along the circumferential direction of piston
Lower oil return hole, oil return hole is blind hole under the gentle groove of oil return hole under oil return hole, oil groove on the oil groove, and hole depth exceedes annular groove bottom
Portion.
Being offered on the utility model piston makes oil return hole on oil groove, the oil-recovery tank that oil return hole connects under air drain.
Oil return hole is connected with piston internal cavity under the utility model oil groove.
For convenience of the outflow of lubricating oil, the radial direction of the utility model piston respectively with oil return under the gentle groove of oil return hole under oil groove
Angle between the axis in hole is more than 0 o, less than or equal to 20o.
To reduce the stress concentration of piston ring annular groove bottom, annular groove bottom described in the utility model is circular arc Bottom Shape.
Due to the adoption of the above technical scheme, the utility model preferably realizes goal of the invention, and drainback passage design is existed
On piston, the leakage phenomenon of lubricating oil is eliminated, reduces oil consumption；It is living since drainback passage need not be processed on the piston ring
Plug ring structure is more compact, quality smaller, it is possible to reduce the height of piston ring groove, piston mass can also smaller, therefore, improve
The force-bearing situation of piston, engine work more balance, are reliable, and service life is longer.
Brief description of the drawings
Fig. 1 is the structure diagram of the embodiment 1 of the utility model；
Fig. 2 is the arrangement schematic diagram of each oil return hole on 1 piston of embodiment；
Fig. 3 is the structure diagram of the utility model embodiment 2；
Fig. 4 is the structure diagram of the utility model embodiment 3.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Embodiment 1：
As seen from Figure 1, Figure 2, a kind of internal combustion engine, it, which is included at least, is arranged on piston crown for ring installation
Three annular grooves, in upper and lower part and the lower part of adjacent annular groove away from the bottom annular groove in combustion chamber end, along piston 4
Circumferential direction be uniformly provided with and be communicated on the oil groove of 4 outer round surface of piston that oil return hole 12 and air drain are oily next time under oil return hole 11, oil groove
Hole 9, oilhole 9 is blind hole next time for oil return hole 12 and air drain under oil return hole 11, oil groove on the oil groove, and hole depth exceedes annular groove bottom
8。
The oil-recovery tank 10 for making that oil return hole 9 connects under oil return hole 11, air drain on oil groove is offered on the utility model piston 4.
Oil return hole 12 is connected with piston internal cavity 2 under the utility model oil groove.
For convenience of the outflow of lubricating oil, the radial direction of the utility model piston respectively with oil return under the gentle groove of oil return hole under oil groove
Angle between the axis in hole is more than 0 o, less than or equal to 20o.The radial direction of piston respectively with oil return hole under oil groove 12 and air drain
Angle between the axis of oil return hole 9 is more than 0 o, less than or equal to 20o.The present embodiment is 7o.
To reduce the stress concentration of piston ring annular groove bottom 8, annular groove bottom 8 described in the utility model is circular arc Bottom Shape.
Meanwhile to improve the leakproofness of piston ring 1, expansion loop 3 is installed on piston ring 1, i.e., processes one on 1 internal diameter of piston ring
Road arc or semicircle type groove, and expansion loop 3 is installed wherein, it is radially to apply a radial pressure to piston ring 1 that it, which is acted on,
Add the sealing performance between piston ring 1 and cylinder body 5.
The present embodiment is away from the bottom annular groove in combustion chamber end（That is oil groove）Upper and lower part and adjacent ring
Groove（That is air drain）Lower part, be uniformly provided with along the circumferential direction of piston 4 be communicated to oil return hole 11 on the oil groove of 4 outer round surface of piston, oil
Oil return hole 12 and air drain oilhole 9 next time under groove, for the benefit of lubricating oil flowed from inside to outside from each oil return hole, 12 He of oil return hole under oil groove
The axis of oil return hole 9 is set with piston radial into 7o under air drain；The aperture of oil return hole 11 is more than oil return hole 9 under air drain on oil groove
Aperture, on the oil groove corresponded under oil return hole 11, air drain between oil return hole 9, oil return is provided with along the axis direction of piston 4
Groove 10, makes the connection of oil return hole 9 under oil return hole 11, air drain on oil groove.And the assembling back clearance 7 of piston ring is 0.00 ㎜~0.15
㎜, the assembling sideshake 6 of the second piston ring adjacent with combustion chamber are the ㎜ of 0.15 ㎜~0.65.
During work, oilhole 9 completely eliminates profit next time for oil return hole 12 and air drain under oil return hole 11, oil groove on the oil groove of setting
The upward leakage of lubricating oil；The lubricating oil major part that piston ring is scraped off from 5 inner surface of cylinder body flows back to fuel tank through piston internal cavity 2,
Fraction is flow back into lubricating system through the gap between piston 4 and cylinder body 5, thus reduces the consumption of lubricating oil；And
No longer need to be drilled with oil return hole on piston ring, therefore, piston ring can be made more thinner, close between piston ring and cylinder wall
Sealing property is improved, so as to improve the function of striking off of lubricating oil, thus reduces oil consumption.Further, since oil groove is next time
Oilhole 12 and the inner cavity 2 of piston 4 directly penetrate through, and therefore, piston 4 will not form high pressure when moving in piston ring groove, thus complete
It totally disappeared except the upward leakage of lubricating oil.
The utility model designs drainback passage on piston, eliminates the leakage phenomenon of lubricating oil, reduces oil consumption；By
In that need not process drainback passage on the piston ring, piston ring structure is more compact, quality smaller, it is possible to reduce the height of piston ring groove
Degree, piston mass can also smaller, therefore, improve the force-bearing situation of piston, it is engine work more balance, reliable, use the longevity
Order longer.
Embodiment 2：
From the figure 3, it may be seen that oil return hole 12 is blind hole under the oil groove of the present embodiment, the lubricating oil that piston ring scrapes off can only pass through
Gap between piston and cylinder is flow back into lubricating system, so, it is possible to reduce the impurity in lubricating oil, improves lubricity
Energy.
Remaining same embodiment 1.
Embodiment 3：
As shown in Figure 4, oil return hole 9 is a hole under oil return hole 11 and air drain on the oil groove of the present embodiment, at the same with oil groove,
Air drain connects.So, it is possible to reduce the axial length of piston 4, so as to reduce the quality of piston 4.
Remaining same embodiment 1.
Claims (5)
1. a kind of internal combustion engine, it, which is included at least, is arranged on three annular grooves that piston crown is used for ring installation, it is special
Sign is the lower part in the upper and lower part of the bottom annular groove in remote combustion chamber end and adjacent annular groove, along the circumferential equal of piston
It is even be provided with oil return hole on oil groove, oil return hole under the gentle groove of oil return hole under oil groove, on the oil groove under oil return hole, oil groove oil return hole and
Oil return hole is blind hole under air drain, and hole depth exceedes annular groove bottom.
2. internal combustion engine according to claim 1, it is characterized in that being offered on piston makes oil return hole on oil groove, under air drain
The oil-recovery tank of oil return hole connection.
3. internal combustion engine according to claim 1, it is characterized in that oil return hole is connected with piston internal cavity under oil groove.
4. internal combustion engine according to claim 1, it is characterized in that the radial direction of piston is gentle with oil return hole under oil groove respectively
Angle under groove between the axis of oil return hole is more than 0 o, less than or equal to 20o.
5. according to the internal combustion engine described in claim 1 or 2 or 3 or 4, it is characterized in that the annular groove bottom is circular arc bottom shape
Shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324564.6U CN207297188U (en) | 2017-10-16 | 2017-10-16 | Internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721324564.6U CN207297188U (en) | 2017-10-16 | 2017-10-16 | Internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207297188U true CN207297188U (en) | 2018-05-01 |
Family
ID=62414153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721324564.6U Expired - Fee Related CN207297188U (en) | 2017-10-16 | 2017-10-16 | Internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207297188U (en) |
-
2017
- 2017-10-16 CN CN201721324564.6U patent/CN207297188U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20191016 |