CN208456725U - Piston on diesel engine - Google Patents
Piston on diesel engine Download PDFInfo
- Publication number
- CN208456725U CN208456725U CN201821099572.XU CN201821099572U CN208456725U CN 208456725 U CN208456725 U CN 208456725U CN 201821099572 U CN201821099572 U CN 201821099572U CN 208456725 U CN208456725 U CN 208456725U
- Authority
- CN
- China
- Prior art keywords
- head
- annular groove
- groove
- wall
- oil extraction
- 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 the pistons on a kind of diesel engine, including top, head and skirt section, the outer diameter in skirt section is greater than the outer diameter on head, top is equipped with pit, head upper end outer wall is inlaid with alloy annulus, heat-insulated annular groove is successively arranged below alloy annulus, first seal groove and the second seal groove, it is inlaid with heat-resisting guard ring respectively on outer wall between heat-insulated annular groove and the first seal groove and between the first seal groove and the second seal groove, oil extraction annular groove is additionally provided in the lower end on head, the upper wall of oil extraction annular groove aperture position is equipped with step, pass through inclination approaching face connection between the step and head outer wall, chamfering is equipped in the lower wall end portion of oil extraction annular groove aperture position, groove is equipped in the lower section of the chamfering position, skirt upper end face is equipped with tapered surface, the tapered surface is connect with groove, head is equipped with opposite with the position of oil extraction annular groove The radial through-hole answered.Good heat conductivity and the reliable technical effect of structure are just realized in this way.
Description
Technical field
The utility model relates to the pistons on a kind of diesel engine, and in particular to the piston on a kind of diesel engine.
Background technique
Piston is parts reciprocating in Motor Engine Cylinder body.The basic structure of piston can be divided into top, head
Portion and skirt section.Top land is the major part for forming combustion chamber, and shape is related with selected combustion-chamber shape.And diesel oil
Machine top land usually has various pits, and concrete shape, position and size all must be with the gaseous mixture shapes of diesel engine
It is adapted at the requirement with burning.
At work, the spark plug on cylinder head produces electric spark by high-voltage electricity, and mixed gas is lighted, when burning
Between it is very short, about 0.015 second；But speed is quickly, reaches about 30 meters per second.Gas fiercely expands, and pressure sharply increases, can
Up to 60 to 75 atmospheric pressure, the temperature of burning gases is spent to Celsius 2000 to 2500.When burning, local temperature is likely to be breached three,
4000 degree, combustion gas is added to the impact force on piston up to 15 tons.Piston is rapid to bottom dead centre under the crunch effect of combustion gas
Movement is pushed and is run under connecting rod Yemen, and connecting rod just turn over by band dynamic crankshaft.
Therefore the movement of piston is all to be operated under high speed and high temperature, and the structure of existing piston is in axial activity
In, due to being influenced that friction can be generated with the inner wall of cylinder during exercise by heat expansion, the temperature of piston can be further increased, such as
Tab phenolphthaleinum heat just will affect the stability of the movement of piston not in time, and then influence the performance of engine.
Summary of the invention
To solve the above problems, the purpose of this utility model is to provide a kind of good heat conductivity and the reliable diesel oil of structure
Piston on engine.
To achieve the above object, the utility model provides following technical solution: the piston on a kind of diesel engine, packet
Top, head and skirt section are included, the outer diameter in the skirt section is greater than the outer diameter on the head, and the top is equipped with pit,
The head upper end outer wall is inlaid with alloy annulus, and heat-insulated annular groove, the first sealing are successively arranged below the alloy annulus
Slot and the second seal groove, between the heat-insulated annular groove and first seal groove and the first seal groove and the second seal groove it
Between outer wall on be inlaid with heat-resisting guard ring respectively, be additionally provided with oil extraction annular groove in the lower end on the head, the oil extraction annular groove is opened
The upper wall of mouth position is equipped with step, by inclination approaching face connection between the step and the head outer wall, in the oil extraction
The lower wall end portion of annular groove aperture position is equipped with chamfering, is equipped with groove in the lower section of the chamfering position, the skirt upper end face is equipped with
Tapered surface, the tapered surface are connect with the groove, and the head is equipped with radial direction corresponding with the position of the oil extraction annular groove
Through-hole.
The radial through-hole is to be symmetrical arranged in pairs.
Tubular is also equipped on the skirt section prevents swollen copper sheet.
This structure of the utility model has compared with original piston and improves wearability and heat resistance, piston to
When lower movement, step on oil extraction annular groove and inclination approaching face, which can have lubrication, to be imported in oil extraction annular groove, when piston upwards,
Machine oil can be pushed into groove and be concentrated close to the tapered surface of oil extraction annular groove aperture position, however extra oil passageway chamfering is led
Enter in oil extraction annular groove, the machine oil concentrated in oil extraction annular groove absorbs the heat on piston, plays the role of thermally conductive cooling, then
Machine oil can be discharged into oil sump from the inner hole of skirt section by radial through-hole in this way, just realize good heat conductivity in this way and structure can
The technical effect leaned on.
The utility model is further described with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the cross-sectional view of specific embodiment of the present invention；
Fig. 2 is the half sectional view of specific embodiment of the present invention；
Fig. 3 is the enlarged drawing of A in Fig. 1；
Fig. 4 is the enlarged drawing of B in Fig. 2.
Specific embodiment
The utility model is specifically described below by embodiment, is served only for carrying out the utility model further
Illustrate, should not be understood as the restriction to scope of protection of the utility model.
As shown in Fig. 1-Fig. 4, present embodiment discloses the piston on a kind of diesel engine, including top 1, head 2 with
And skirt section 3, the outer diameter in skirt section 3 are greater than the outer diameter on head 2, top 1 is equipped with pit, and 2 upper end outer wall of head is inlaid with alloy circle
Ring 4 is successively arranged heat-insulated annular groove 21, the first seal groove 22 and the second seal groove 23 in the lower section of alloy annulus 4, in work, every
Hot annular groove 21, the first seal groove 22 and the second seal groove 23 can configure sealing ring, and heat-insulated annular groove 21 can be by the warm of top land 1
It spreads export to come, improves the working environment of piston, between heat-insulated annular groove 21 and the first seal groove 22 and the first seal groove 22
And it is inlaid with heat-resisting guard ring 5 respectively on the second outer wall between seal groove 23, it is additionally provided with oil extraction annular groove 24 in the lower end on head 2,
Oil extraction annular groove 24 can configure oil extraction ring at work, and the upper wall of 24 aperture position of oil extraction annular groove is equipped with step 6, specifically such as Fig. 4 institute
Show, is connected between 2 outer wall of the step 6 and head by inclination approaching face 7, set in the lower wall end portion of 24 aperture position of oil extraction annular groove
There is chamfering 8, specific as shown in figure 3, being equipped with groove 9 in the lower section of 8 position of chamfering, 3 upper surface of skirt section is equipped with tapered surface 10, should
Tapered surface 10 is connect with groove 9, and head 2 is equipped with radial through-hole 31 corresponding with the position of oil extraction annular groove 24.
In order to which the machine oil in oil extraction annular groove 24 is discharged quickly, the quantity of radial through-hole 31 is to be symmetrical arranged in pairs, most preferably
Scheme can be four pairs.
Tubular is also equipped on skirt section 3 prevents swollen copper sheet 32.Such structure can make the heat expansion Deformation control in skirt section 3 exist
In certain range, the normal operation of piston is ensured.
By above structure, has compared with original piston and improve wearability and heat resistance, when piston moves downward,
Step 6 on oil extraction annular groove 24 and inclination approaching face 7, which can have lubrication, to be imported in oil extraction annular groove 24, when piston upwards, is leaned on
Machine oil can be pushed into groove 9 by the tapered surface 10 of nearly 24 aperture position of oil extraction annular groove to be concentrated, however extra oil passageway is fallen
Angle 8 imports in oil extraction annular groove 24, and the machine oil concentrated in oil extraction annular groove 24 absorbs the heat on piston, plays thermally conductive cooling
Effect, then machine oil can be discharged into oil sump from 3 inner hole of skirt section by radial through-hole 31, just realize good heat conductivity in this way
And the reliable technical effect of structure.
Claims (3)
1. the outer diameter of the piston on a kind of diesel engine, including top, head and skirt section, the skirt section is greater than the head
The outer diameter in portion, the top are equipped with pit, it is characterised in that: the head upper end outer wall is inlaid with alloy annulus, in institute
It states and is successively arranged heat-insulated annular groove, the first seal groove and the second seal groove below alloy annulus, in the heat-insulated annular groove and described
Heat-resisting guard ring is inlaid on outer wall between first seal groove and between the first seal groove and the second seal groove respectively, described
The lower end on head be additionally provided with oil extraction annular groove, the upper wall of the oil extraction annular groove aperture position is equipped with step, the step and the head
By inclination approaching face connection between portion's outer wall, it is equipped with chamfering in the lower wall end portion of the oil extraction annular groove aperture position, at this
The lower section of chamfering position is equipped with groove, and the skirt upper end face is equipped with tapered surface, which connect with the groove, described
Head is equipped with radial through-hole corresponding with the position of the oil extraction annular groove.
2. the piston on diesel engine according to claim 1, it is characterised in that: the radial through-hole is right in pairs
Claim setting.
3. the piston on diesel engine according to claim 1, it is characterised in that: be also equipped on the skirt section
Tubular prevents swollen copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821099572.XU CN208456725U (en) | 2018-07-12 | 2018-07-12 | Piston on diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821099572.XU CN208456725U (en) | 2018-07-12 | 2018-07-12 | Piston on diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208456725U true CN208456725U (en) | 2019-02-01 |
Family
ID=65172193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821099572.XU Expired - Fee Related CN208456725U (en) | 2018-07-12 | 2018-07-12 | Piston on diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208456725U (en) |
-
2018
- 2018-07-12 CN CN201821099572.XU patent/CN208456725U/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: 20190201 |