CN205225474U - Internal -combustion engine cylinder head gas seal structure - Google Patents
Internal -combustion engine cylinder head gas seal structure Download PDFInfo
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- CN205225474U CN205225474U CN201521093408.4U CN201521093408U CN205225474U CN 205225474 U CN205225474 U CN 205225474U CN 201521093408 U CN201521093408 U CN 201521093408U CN 205225474 U CN205225474 U CN 205225474U
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Abstract
The utility model provides an internal -combustion engine cylinder head gas seal structure, includes cylinder head, cylinder gasket, cylinder jacket and cylinder block, the downthehole coaxial cylinder jacket that is provided with of cylinder of cylinder block, the top of cylinder jacket and cylinder block all compresses tightly the cooperation through the bottom of cylinder gasket and cylinder head, the inward flange of cylinder jacket top surface is provided with the inner ring platform, the top surface of inner ring platform contacts with the bottom surface of cylinder head, the outward flange of cylinder jacket top surface is provided with the outer loop platform, be provided with the annular groove in the cylinder head directly over the outer loop bench top face, the annular groove compresses tightly the cooperation through cylinder gasket with the outer loop platform, the inward flange diameter of the inward flange diameter more than or equal to outer loop bench top face of annular groove, the outward flange diameter of the outward flange diameter less than or equal to outer loop bench top face of annular groove. This designs, and not only the gas tightness is good, long service life, simple structure low in manufacturing cost moreover.
Description
Technical field
The utility model relates to the sealing configuration of combustion engine cylinder head, particularly relates to a kind of combustion engine cylinder head gas seal structure, is specifically applicable to strengthen sealability, simplifies production technology.
Background technique
Combustion chambers of internal combustion engines can produce high temperature, high-pressure gas up to 1000 DEG C when fuel combustion, must have a kind of sealing configuration reliably to ensure that combustion gas does not leak outside, in order to avoid the power of reduction internal-combustion engine, performance and reliability between cylinder head and cylinder block.Be assemblied in the head gasket between cylinder block and cylinder head, its major function is sealing, be the sealing load that firing chamber, cooling liquid and grease channel provide certain, ensure the effective sealing between cylinder block and head, the combustion gas of what wherein maximum, the reliability of technical difficulty was difficult to ensure most is exactly high temperature, high pressure.Along with the progressively upgrading of discharge and continually strengthening of structure, motor detonation pressure also increases thereupon, and cylinder head gasket structure pattern has gradually adopted full-metallic type.Current adopted multilayer full-metallic or individual layer all-metal cylinder gasket, due to the characteristic of adopted steel plate materials or the narrow limitation of structural design, there is non-refractory high pressure, working life is short, sealing effect is not good defect in part; Such as multilayer all-metal cylinder gasket hermetic seal position generally adopts flange or clad structure, cylinder head bolt pretightening force huge during assembling may cause flange or clad structure to damage, and combustion gas also easily enters between layers during engine running, in the course of time cause sealing unreliable, individual layer all-metal cylinder gasket generally adopts structure flat board stamping out convex tendon, if it is improper that this structure designs, when can cause tools for bolts ' pretension, convex rib structure is driven plain, and affects sealing effect.For ensureing reliable sealing effect, need to adopt the complicated sealing configuration of good material and design, this often causes manufacturing process difficulty and cost of parts to remain high.How to improve and to ensure that the sealing of firing chamber is the direction that people study and make great efforts always.
Chinese patent Authorization Notice No. is CN202140196U, and authorized announcement date is that the utility model patent on February 8th, 2012 discloses a kind of heavy duty head gasket and sealing configuration, comprises head gasket, cylinder liner, cylinder block and head.The triangle annulus that the upper plane intermediate portion of the cylinder sleeve shoulder of cylinder liner has a circle outstanding, common low carbon steel sheet head gasket is assemblied in cylinder head and between cylinder liner and cylinder block, during assembling, the fastening force of clamping bolt makes head gasket produce plastic deformation, in cylinder head and form A, B, C, D quadruple dioptric type seal area between cylinder liner and cylinder block, reach tightly prevent the indoor High Temperature High Pressure of cylinder combustion combustion gas toward the object of external leakage.Although this model utility can gap effectively between blanket gas cylinder sleeve and head gasket, still there is following defect in it:
1, the head gasket of this model utility and cylinder should between sealing only rely on bolt pretightening, use for a long time, there is the unstable hidden danger of sealing.
Summary of the invention
The purpose of this utility model is the problem overcoming the sealing reliability difference existed in prior art, provides the combustion engine cylinder head gas seal structure that a kind of sealing reliability is high.
For realizing above object, technical solution of the present utility model is:
A kind of combustion engine cylinder head gas seal structure, comprises cylinder head, head gasket, cylinder liner and cylinder block, is coaxially arranged with cylinder liner in the cylinder-bore of described cylinder block, and the top of cylinder liner and cylinder block is all by the bottom compression fit of head gasket and cylinder head;
The inward flange of described cylinder liner end face is provided with interior land, the described end face of interior land contacts with the bottom surface of cylinder head, the outward edge of described cylinder liner end face is provided with outer land, cylinder head directly over described outer shroud countertop is provided with annular groove, and described annular groove is by head gasket and outer land compression fit; The inward flange diameter of described annular groove is more than or equal to the inward flange diameter of outer shroud countertop, and the outward edge diameter of described annular groove is less than or equal to the outward edge diameter of outer shroud countertop.
The annular mesa-shaped structure of described outer land to be cross section be trapezoidal projection, the circular groove structure of described annular groove to be cross section be semicircular arc.
The annular mesa-shaped structure of described outer land to be cross section be trapezoidal projection, described annular groove is the circular groove structure of rectangular in cross-section.
Be provided with fillet structure between the bottom interior edge of described annular groove and cylinder head bottom surface, between the bottom outer edge of described annular groove and cylinder head bottom surface, be provided with fillet structure.
The end face of described outer land and side all with the bottom surface compression fit of head gasket, the top of described head gasket is filled in annular groove inside, and the end face of described cylinder block is by the bottom surface compression fit of head gasket and cylinder head.
The bottom of described cylinder head is coaxially arranged with at least two annular grooves.
Described head gasket is the pad of slab construction, and the thickness of head gasket is 0.5 Hao meter – 2.5 millimeters.
Described head gasket is manufactured by steel plate materials, and the thickness of head gasket is 1 Hao meter – 1.5 millimeters, and the groove depth of described annular groove is 0.1 Hao meter – 0.6 millimeter.
Compared with prior art, the beneficial effects of the utility model are:
1, a kind of combustion engine cylinder head gas seal structure China and foreign countries of the utility model land coordinates with annular groove case, head gasket is under the effect of cylinder head fixing bolt pretightening force, fit closely outer land being formed with outer land of head gasket bottom surface seals, and the end face of head gasket to be filled in annular groove and to be formed with annular groove and seals; Form sealing configuration closely between such design thing cylinder head and cylinder block, improve the reliability of cylinder head sealing.Therefore, the design seals tightly, reliability is high.
2, in a kind of combustion engine cylinder head gas seal structure of the utility model, the bottom of cylinder head is coaxially arranged with at least two annular grooves, and such being designed with helps strengthen the sealing effect between cylinder head and head gasket, effective increasing service life of engine.Therefore, the design's good sealing effect, long service life.
3, in a kind of combustion engine cylinder head gas seal structure of the utility model, head gasket is single flat plate structure, structure is simple, easy to process, low cost of manufacture, install and use rear good seal performance, good seal action can be played under the limited conditions of High Temperature High Pressure.Therefore, the design's low cost of manufacture easy to process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the enlarged diagram at A place in Fig. 1.
Fig. 3 is the structural representation of embodiment 4.
In figure: cylinder head 1, annular groove 11, head gasket 2, cylinder liner 3, interior land 31, outer land 32, cylinder block 4.
Embodiment
Illustrate below in conjunction with accompanying drawing and with embodiment, the utility model to be described in further detail.
See figure 1 – Fig. 3, a kind of combustion engine cylinder head gas seal structure, comprise cylinder head 1, head gasket 2, cylinder liner 3 and cylinder block 4, be coaxially arranged with cylinder liner 3 in the cylinder-bore of described cylinder block 4, the top of cylinder liner 3 and cylinder block 4 is all by the bottom compression fit of head gasket 2 with cylinder head 1;
The inward flange of described cylinder liner 3 end face is provided with interior land 31, the end face of described interior land 31 contacts with the bottom surface of cylinder head 1, the outward edge of described cylinder liner 3 end face is provided with outer land 32, cylinder head 1 directly over described outer land 32 end face is provided with annular groove 11, and described annular groove 11 is by head gasket 2 and outer land 32 compression fit; The inward flange diameter of described annular groove 11 is more than or equal to the inward flange diameter of outer land 32 end face, and the outward edge diameter of described annular groove 11 is less than or equal to the outward edge diameter of outer land 32 end face.
The annular mesa-shaped structure of described outer land 32 to be cross sections be trapezoidal projection, the circular groove structure of described annular groove 11 to be cross sections be semicircular arc.
The annular mesa-shaped structure of described outer land 32 to be cross sections be trapezoidal projection, described annular groove 11 is circular groove structures of rectangular in cross-section.
Be provided with fillet structure between the bottom interior edge of described annular groove 11 and cylinder head bottom surface, between the bottom outer edge of described annular groove 11 and cylinder head bottom surface, be provided with fillet structure.
The end face of described outer land 32 and side all with the bottom surface compression fit of head gasket 2, it is inner that the top of described head gasket 2 is filled in annular groove 11, and the end face of described cylinder block 4 is by the bottom surface compression fit of head gasket 2 with cylinder head 1.
The bottom of described cylinder head 1 is coaxially arranged with at least two annular grooves 11.
Described head gasket 2 is the pad of slab construction, and the thickness of head gasket 2 is 0.5 Hao meter – 2.5 millimeters.
Described head gasket 2 is manufactured by steel plate materials, and the thickness of head gasket 2 is 1 Hao meter – 1.5 millimeters, and the groove depth of described annular groove 11 is 0.1 Hao meter – 0.6 millimeter.
Principle of the present utility model is described as follows:
Head gasket 2 can adopt multiple material manufacture, as nonmetal in non-asbestos and steel, copper, aluminium etc.Raise with motor detonation pressure, sealing combustion gas part, metallic material is the development trend of head gasket 2 manufactured materials, prioritizing selection steel plate.
Under the effect of cylinder head fixing bolt pretightening force, there is deformation and fill cylinder liner 3 and the gap between cylinder block 4 and cylinder head 1, thus realize the excellent sealing of cylinder in head gasket 2.
The cross section of the outer land 32 of the design can also be rectangular configuration, and the cross section of the design's annular groove 11 can also be triangular structure.
The annular groove section selection of different size, shape is that the working environment of material, thickness and cylinder interior according to cylinder liner determines.
Embodiment 1:
See Fig. 1, Fig. 2, a kind of combustion engine cylinder head gas seal structure, comprise cylinder head 1, head gasket 2, cylinder liner 3 and cylinder block 4, be coaxially arranged with cylinder liner 3 in the cylinder-bore of described cylinder block 4, the top of cylinder liner 3 and cylinder block 4 is all by the bottom compression fit of head gasket 2 with cylinder head 1; The inward flange of described cylinder liner 3 end face is provided with interior land 31, the end face of described interior land 31 contacts with the bottom surface of cylinder head 1, the outward edge of described cylinder liner 3 end face is provided with outer land 32, cylinder head 1 directly over described outer land 32 end face is provided with annular groove 11, and described annular groove 11 is by head gasket 2 and outer land 32 compression fit; The inward flange diameter of described annular groove 11 is more than or equal to the inward flange diameter of outer land 32 end face, and the outward edge diameter of described annular groove 11 is less than or equal to the outward edge diameter of outer land 32 end face; The annular mesa-shaped structure of described outer land 32 to be cross sections be trapezoidal projection, the circular groove structure of described annular groove 11 to be cross sections be semicircular arc; The end face of described outer land 32 and side all with the bottom surface compression fit of head gasket 2, it is inner that the top of described head gasket 2 is filled in annular groove 11, and the end face of described cylinder block 4 is by the bottom surface compression fit of head gasket 2 with cylinder head 1; Described head gasket 2 is the pad of slab construction, and the thickness of head gasket 2 is 2 millimeters.
Embodiment 2:
Embodiment 2 its difference substantially the same manner as Example 1 is: be provided with fillet structure between the bottom interior edge of described annular groove 11 and cylinder head bottom surface, is provided with fillet structure between the bottom outer edge of described annular groove 11 and cylinder head bottom surface.
Embodiment 3:
See Fig. 3, embodiment 3 its difference substantially the same manner as Example 1 is: the bottom of described cylinder head 1 is coaxially arranged with two annular grooves 11; The annular mesa-shaped structure of described outer land 32 to be cross sections be trapezoidal projection, described annular groove 11 is circular groove structures of rectangular in cross-section, described head gasket 2 is manufactured by steel plate materials, and the thickness of head gasket 2 is 1 millimeter, and the groove depth of described annular groove 11 is 0.3 millimeter.
Embodiment 4:
Embodiment 4 its difference substantially the same manner as Example 1 is: the bottom of described cylinder head 1 is coaxially arranged with three each and every one annular grooves 11; Described head gasket 2 is manufactured by steel plate materials, and the thickness of head gasket 2 is 1.5 millimeters, and the groove depth of described annular groove 11 is 0.5 millimeter.
Claims (8)
1. a combustion engine cylinder head gas seal structure, comprise cylinder head (1), head gasket (2), cylinder liner (3) and cylinder block (4), cylinder liner (3) is coaxially arranged with in the cylinder-bore of described cylinder block (4), the top of cylinder liner (3) and cylinder block (4), all by the bottom compression fit of head gasket (2) with cylinder head (1), is characterized in that:
The inward flange of described cylinder liner (3) end face is provided with interior land (31), the end face of described interior land (31) contacts with the bottom surface of cylinder head (1), the outward edge of described cylinder liner (3) end face is provided with outer land (32), cylinder head (1) directly over described outer land (32) end face is provided with annular groove (11), and described annular groove (11) is by head gasket (2) and outer land (32) compression fit; The inward flange diameter of described annular groove (11) is more than or equal to the inward flange diameter of outer land (32) end face, and the outward edge diameter of described annular groove (11) is less than or equal to the outward edge diameter of outer land (32) end face.
2. a kind of combustion engine cylinder head gas seal structure according to claim 1, is characterized in that: the annular mesa-shaped structure of described outer land (32) to be cross section be trapezoidal projection, the circular groove structure of described annular groove (11) to be cross section be semicircular arc.
3. a kind of combustion engine cylinder head gas seal structure according to claim 1, is characterized in that: the annular mesa-shaped structure of described outer land (32) to be cross section be trapezoidal projection, described annular groove (11) is the circular groove structure of rectangular in cross-section.
4. a kind of combustion engine cylinder head gas seal structure according to Claims 2 or 3, it is characterized in that: between the bottom interior edge of described annular groove (11) and cylinder head bottom surface, be provided with fillet structure, between the bottom outer edge of described annular groove (11) and cylinder head bottom surface, be provided with fillet structure.
5. a kind of combustion engine cylinder head gas seal structure according to claim 1,2 or 3, it is characterized in that: the end face of described outer land (32) and side all with the bottom surface compression fit of head gasket (2), the top of described head gasket (2) is filled in annular groove (11) inside, and the end face of described cylinder block (4) is by the bottom surface compression fit of head gasket (2) with cylinder head (1).
6. a kind of combustion engine cylinder head gas seal structure according to claim 5, is characterized in that: the bottom of described cylinder head (1) is coaxially arranged with at least two annular grooves (11).
7. a kind of combustion engine cylinder head gas seal structure according to claim 6, is characterized in that: the pad that described head gasket (2) is slab construction, and the thickness of head gasket (2) is 0.5 Hao meter – 2.5 millimeters.
8. a kind of combustion engine cylinder head gas seal structure according to claim 7, it is characterized in that: described head gasket (2) is manufactured by steel plate materials, the thickness of head gasket (2) is 1 Hao meter – 1.5 millimeters, and the groove depth of described annular groove (11) is 0.1 Hao meter – 0.6 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521093408.4U CN205225474U (en) | 2015-12-25 | 2015-12-25 | Internal -combustion engine cylinder head gas seal structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521093408.4U CN205225474U (en) | 2015-12-25 | 2015-12-25 | Internal -combustion engine cylinder head gas seal structure |
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| Publication Number | Publication Date |
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| CN205225474U true CN205225474U (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521093408.4U Active CN205225474U (en) | 2015-12-25 | 2015-12-25 | Internal -combustion engine cylinder head gas seal structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464829A (en) * | 2015-12-25 | 2016-04-06 | 东风商用车有限公司 | Fuel gas sealing structure for cylinder head of internal combustion engine |
| CN106907269A (en) * | 2017-04-26 | 2017-06-30 | 四川森洁燃气设备有限公司 | A kind of durable modified cylinder seal part |
| CN109196254A (en) * | 2016-06-09 | 2019-01-11 | Nok株式会社 | The seal construction of cylinder block and head |
-
2015
- 2015-12-25 CN CN201521093408.4U patent/CN205225474U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464829A (en) * | 2015-12-25 | 2016-04-06 | 东风商用车有限公司 | Fuel gas sealing structure for cylinder head of internal combustion engine |
| CN109196254A (en) * | 2016-06-09 | 2019-01-11 | Nok株式会社 | The seal construction of cylinder block and head |
| CN106907269A (en) * | 2017-04-26 | 2017-06-30 | 四川森洁燃气设备有限公司 | A kind of durable modified cylinder seal part |
| CN106907269B (en) * | 2017-04-26 | 2019-03-19 | 四川森洁燃气设备有限公司 | A kind of durable modified cylinder seal part |
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