CN214499244U - Press-in type combined coating cylinder sleeve - Google Patents
Press-in type combined coating cylinder sleeve Download PDFInfo
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- CN214499244U CN214499244U CN202120445554.8U CN202120445554U CN214499244U CN 214499244 U CN214499244 U CN 214499244U CN 202120445554 U CN202120445554 U CN 202120445554U CN 214499244 U CN214499244 U CN 214499244U
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a forced combined coating cylinder liner, including the cylinder liner body, cylinder liner body excircle surface is provided with heat conduction coating, the thermal barrier coating that the horizontal direction borders on each other, heat conduction coating, thermal barrier coating junction are formed with the transition layer, heat conduction coating with the top on cylinder liner body excircle surface links to each other, the thermal barrier coating with the bottom on cylinder liner body excircle surface links to each other, the disc is provided with the antifriction coating in the cylinder liner body. The utility model improves the heat conductivity of the upper part of the excircle and increases the heat preservation of the lower part through the design of the combined coating, thereby reducing the thermal deformation of the cylinder sleeve and simultaneously keeping the good lubricating performance in the cylinder; the inner circle adopts the ceramic alloy coating, so that the friction coefficient is reduced, the power of the engine is improved, and the wear resistance and the corrosion resistance of the cylinder hole are improved.
Description
Technical Field
The utility model relates to an automobile engine field specifically is a forced combination coating cylinder liner.
Background
The cylinder liner is a widely used part in an automobile engine, mainly has the functions of sealing, heat conducting and forming a sliding surface with a piston ring, and is one of the core parts of the engine. The development direction of the main functions of the cylinder liner is the combination with the cylinder body, the heat conductivity, the deformation resistance and the friction reduction capability, and along with the improvement of the emission requirements of the national policy on automobiles, the requirements of automobile manufacturers on engines are higher and higher, and correspondingly, the requirements on high-performance cylinder liners are higher and higher.
The aluminum spraying cylinder sleeve is better combined with a cylinder body in the market at present, the aluminum spraying cylinder sleeve is combined with the cylinder body in a die-casting mode, the combination strength and the heat conductivity are greatly improved compared with those of a traditional threaded cylinder sleeve, but the heat conductivity is too good, and problems exist, such as the reduction of lubricating performance of engine oil caused by too low local temperature and the increase of friction coefficient. In the aspect of reducing friction work, reticulate patterns and surface treatment technologies are used as the leading parts in the industry, while cast-in cylinder liners are generally semi-finished products and cannot adopt the two technologies, so that the scheme of the press-in type combined coating cylinder liner is selected, the arrangement of a combined coating is matched, excellent technologies in all aspects can be integrated, the overall function of the cylinder liner can be exerted to the greatest extent, and the technical requirements of the engine market which are increasingly improved are met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a forced combination coating cylinder liner to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a press-in combination coated cylinder liner, comprising: the cylinder sleeve comprises a cylinder sleeve body, wherein a heat conduction coating and a heat insulation coating which are mutually adjacent in the horizontal direction are arranged on the outer circle surface of the cylinder sleeve body, a transition layer is formed at the joint of the heat conduction coating and the heat insulation coating, the heat conduction coating is connected with the top end of the outer circle surface of the cylinder sleeve body, the heat insulation coating is connected with the bottom end of the outer circle surface of the cylinder sleeve body, and a friction reducing coating is arranged on the inner circle surface of the cylinder sleeve body.
As a further aspect of the present invention: the heat-conducting coating is arranged at a position which is 30-70 mm away from the upper end of the cylinder sleeve body, the length of the transition layer is 5-10 mm, and the heat-insulating coating is arranged on the part, which is not provided with the heat-conducting coating and the transition layer, of the outer circle surface of the cylinder sleeve body.
As a further aspect of the present invention: the cylinder sleeve body is arranged in the cylinder body in an interference fit mode.
As a further aspect of the present invention: the heat-conducting coating material is aluminum-silicon alloy, the heat-insulating coating material is aluminum oxide, and the friction-reducing coating is hexagonal boron nitride ceramic.
As a further aspect of the present invention: the transition layer is made of aluminum oxide or aluminum-silicon alloy or aluminum oxide and aluminum-silicon alloy.
As a further aspect of the present invention: the thickness of the heat-conducting coating and the heat-insulating coating on the excircle surface is 0.2 +/-0.012 mm.
As a further aspect of the present invention: the roughness of the outer circle surface of the cylinder sleeve body is Rz0.8-3.2.
Compared with the prior art, the beneficial effects of the utility model are that: starting from optimizing the environment temperature in the cylinder and reducing the friction coefficient, the utility model discloses a combined coating design of cylinder liner, the cylinder liner through interference fit impress with the mode of cylinder body, make the excircle upper portion of cylinder liner body improve the heat conductivity, the lower part has increased the heat insulating ability then, when reducing the thermal deformation of cylinder liner, has kept good lubricating property in the cylinder; interior circle has adopted the ceramic alloy cladding material, has reduced coefficient of friction, has promoted the power of engine, reduces machine oil consumption and fuel consumption, has improved the wearability and the corrosion resistance in jar hole simultaneously, has improved the life-span of engine, the utility model discloses the combined effect has surpassed the single coating of cast-in type in the past.
Drawings
Fig. 1 is a schematic structural view of the cross section of the present invention.
In the figure: 1-cylinder liner body, 2-heat conduction coating, 3-heat insulation coating and 4-friction reduction coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a cylinder liner with a press-in type combined coating includes a cylinder liner body 1, a heat conducting coating 2 and a heat insulating coating 3 adjacent to each other in a horizontal direction are disposed on an outer circumferential surface of the cylinder liner body, a transition layer is formed at a joint of the heat conducting coating 2 and the heat insulating coating 3, the heat conducting coating 2 is connected to a top end of the outer circumferential surface of the cylinder liner body, the heat insulating coating 3 is connected to a bottom end of the outer circumferential surface of the cylinder liner body, and a friction reducing coating 4 is disposed on an inner circumferential surface of the cylinder liner body 1.
Specifically, the roughness of the outer circle surface of the cylinder sleeve body 1 is Rz0.8-3.2, the cylinder sleeve body 1 is obtained through machining and honing processes, and the outer circle surface of the cylinder sleeve body 1 is pressed into the cylinder body in an interference fit mode.
Specifically, the material of the heat-conducting coating 2 is silicon-aluminum alloy, the material of the heat-insulating coating 3 is aluminum oxide, the material of the transition layer is the superposition of silicon-aluminum alloy or aluminum oxide or silicon-aluminum alloy and aluminum oxide, the coating thickness of the heat-conducting coating 2 and the heat-insulating coating 3 is 0.2 +/-0.012 mm, the heat-conducting coating 2 is arranged at the position of the excircle surface 30-70 mm away from the top end of the cylinder sleeve body 1, the length of the transition layer is 5-10 mm, the heat-insulating coating 3 is arranged at the position of the rest of the excircle surface of the cylinder sleeve body 1 where the heat-conducting coating 2 and the transition layer are not arranged, the heat-conducting coating 2 is sprayed from the top end of the excircle surface of the cylinder sleeve body, the heat-insulating coating 3 is sprayed from the bottom end of the excircle surface of the cylinder sleeve body 1, the bonding force of the heat-conducting coating 2 and the heat-insulating coating 3 is enhanced by the transition layer, and the heat conductivity of the heat-conducting coating 2 is improved on the upper part of the excircle surface of the cylinder sleeve body 1, the heat insulation performance of the lower part of the outer circle surface of the cylinder sleeve body is enhanced by the heat insulation coating 3, and the heat insulation coating and the cylinder sleeve body jointly reduce the heat deformation phenomenon of the cylinder sleeve body.
Specifically, the friction reducing coating 4 is arranged on the inner circular surface of the cylinder sleeve body 1, the friction reducing layer is made of hexagonal boron nitride ceramic, namely ceramic made of boron nitride with a hexagonal crystal structure, the friction reducing coating 4 is made through a plasma low-temperature growth technology, the influence of the friction reducing coating on the surface size and the roughness is small, the surface friction coefficient can be obviously reduced, the friction coefficient of the cylinder sleeve body 1 is reduced through the friction reducing coating 4, and the wear resistance and the corrosion resistance of the cylinder sleeve body hole are improved.
Specifically, the manufacturing method of the press-in type combined coating cylinder sleeve comprises the following steps: s1: centrifugally casting a blank of the cylinder sleeve body, and then manufacturing the cylinder sleeve body by machining and honing processes; s2: the excircle surface is processed by metal wire spraying to obtain 0.35 plus or minus 0.1mm excircle surface heat conduction coating and heat insulation coating, the porosity of the two coatings is below 5%, and the bonding strength between the two coatings is above 20 Mpa; s3, honing the inner circle of the cylinder sleeve, and preparing the inner circle surface friction reducing coating by a plasma low-temperature growth technology; s4: and grinding the surface of the excircle to enable the thickness of the two coatings on the excircle surface to be 0.2 +/-0.012 mm.
Right the utility model discloses and do not set up friction reducing coating's cylinder liner inner circle face and carry out the repeated hardness of multiunit and detect, gained data is as follows 1:
TABLE 1
Use the CKS ring with the utility model discloses and the cylinder liner appearance piece that does not set up the antifriction layer carries out the repeated fast grinding test of multiunit, and the test condition is load 100N, and reciprocating time 3h, gained wearing and tearing data are as following table 2:
TABLE 2
As can be seen from the upper tables 1 and 2, the utility model discloses an antifriction layer can obviously reduce the wearing and tearing of the interior disc of cylinder liner body 1.
Will the utility model discloses carry out relevant combined test, detect and prove, ordinary no coating cylinder liner, the highest 29.6% that has reduced of product wearing and tearing volume, fuel consumption reduces about 3%, and piston assembly's mechanical loss reduces more than 20%, and the cylinder liner heat altered shape condition reduces.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A press-in combination coated cylinder liner, comprising: cylinder liner body (1), cylinder liner body excircle surface is provided with heat conduction coating (2), thermal-insulated coating (3) that the horizontal direction borders on each other, heat conduction coating (2), thermal-insulated coating (3) junction are formed with the transition layer, heat conduction coating (2) with the top on cylinder liner body excircle surface links to each other, thermal-insulated coating (3) with the bottom on cylinder liner body excircle surface links to each other, cylinder liner body (1) interior disc is provided with antifriction coating (4).
2. The cylinder liner with the press-in combined coating as claimed in claim 1, wherein the heat-conducting coating (2) is arranged at a position 30-70 mm away from the upper end of the cylinder liner body (1), the length of the transition layer is 5-10 mm, and the heat-insulating coating (3) is arranged at a position, where the heat-conducting coating (2) and the transition layer are not arranged, on the outer circumferential surface of the cylinder liner body (1).
3. The cylinder liner with the press-in combined coating as claimed in claim 1, characterized in that the cylinder liner body (1) is arranged in the cylinder body by interference fit.
4. The cylinder liner with the press-in combined coating according to claim 1, wherein the material of the heat-conducting coating (2) is aluminum-silicon alloy, the material of the thermal insulation coating (3) is aluminum oxide, and the friction reducing coating (4) is hexagonal boron nitride ceramic.
5. The cylinder liner with the press-in type combined coating according to claim 1, wherein the material of the transition layer is alumina or aluminum-silicon alloy or alumina and aluminum-silicon alloy.
6. The cylinder liner with the press-in combined coating as claimed in claim 1, wherein the thicknesses of the heat-conducting coating (2) and the heat-insulating coating (3) on the outer circular surface are 0.2 +/-0.012 mm.
7. The cylinder liner with the press-in combined coating as claimed in claim 1, characterized in that the roughness of the outer circumferential surface of the cylinder liner body (1) is rz0.8-3.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120445554.8U CN214499244U (en) | 2021-03-01 | 2021-03-01 | Press-in type combined coating cylinder sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120445554.8U CN214499244U (en) | 2021-03-01 | 2021-03-01 | Press-in type combined coating cylinder sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499244U true CN214499244U (en) | 2021-10-26 |
Family
ID=78226868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120445554.8U Active CN214499244U (en) | 2021-03-01 | 2021-03-01 | Press-in type combined coating cylinder sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499244U (en) |
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2021
- 2021-03-01 CN CN202120445554.8U patent/CN214499244U/en active Active
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