CN110700959B - Dry-type cylinder jacket and engine - Google Patents
Dry-type cylinder jacket and engine Download PDFInfo
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- CN110700959B CN110700959B CN201911040350.XA CN201911040350A CN110700959B CN 110700959 B CN110700959 B CN 110700959B CN 201911040350 A CN201911040350 A CN 201911040350A CN 110700959 B CN110700959 B CN 110700959B
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- deformation
- cylinder
- dry
- engine
- cylinder liner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/004—Cylinder liners
Abstract
The invention belongs to the technical field of engines, and particularly relates to a dry cylinder sleeve and an engine, wherein the dry cylinder sleeve comprises a body and a deformation structure, a cylindrical hole is formed in the body, the cylindrical hole is matched with a piston of the engine, the deformation structure is formed on the outer wall of the body and is matched with a deformed cylinder body of the engine.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a dry cylinder sleeve and an engine.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
In the prior art, cylinder liners are mainly divided into wet cylinder liners and dry cylinder liners.
For dry liners, the wall thickness of the liner is getting smaller and smaller in order to enhance the heat transfer as much as possible, and is currently being developed to 1.5mm or even 1 mm. To this kind of cylinder liner, under the circumstances with the cylinder block complex, though do benefit to heat transfer, but because the wall thickness is too thin, the cylinder liner is interference fit with cylinder block jar hole, because the reason of assembly stress, the cylinder block jar hole can warp after the assembly, and the cylinder cap passes through cylinder cap bolted connection with the cylinder block, can produce axial effort during the assembly and force the jar hole and warp, then cause the cylinder liner to warp and lead to hole "out of round", the cylinder liner of certain degree warp and can accept, but when the jar hole warp too big, then piston ring and piston can't effectively adapt to here and warp, lead to cylinder liner and piston ring wearing and tearing because of can not effectively cooperate, influence the engine performance, cause the air leakage big, vibrate big scheduling.
Disclosure of Invention
The invention aims to at least solve the problem that the cylinder body deforms to cause the inner hole of the cylinder sleeve to be out of round. The purpose is realized by the following technical scheme:
the invention provides a dry cylinder sleeve in a first aspect, which comprises a body and a deformation structure, wherein a cylindrical hole is formed in the body and is matched with a piston of an engine, the deformation structure is formed on the outer wall of the body, and the deformation structure is arranged to be matched with a deformed cylinder body of the engine.
According to the dry cylinder sleeve provided by the embodiment of the invention, the outer wall of the cylinder sleeve is processed to form the deformation structure, so that the dry cylinder sleeve is suitable for the deformation of the cylinder body of an engine, the processing of the deformation structure is matched with the actual deformation curve of the cylinder sleeve, the actual deformation curve is obtained through simulation calculation, when the engine deforms, the deformation structure can offset partial deformation of the cylinder body, the inner wall of the cylinder sleeve is prevented from being influenced to deform, the cylinder sleeve is prevented from being influenced, the inner wall of the cylinder sleeve is prevented from deforming, the cylindrical hole is matched with the piston and the piston ring, the offset of the deformation structure and the cylinder body can keep the cylindricity in the body, and the problems of high machine consumption, large air leakage and the like caused.
In addition, the dry cylinder liner according to the embodiment of the present invention may have the following additional technical features:
in some embodiments of the invention, the deformation structure comprises a first deformation;
the first deformation part is a recess of the outer wall towards the inside, and the first deformation part is smoothly connected with other positions of the outer wall.
In some embodiments of the invention, the deformation structure comprises a second deformation;
the second deformation part is a bulge of the outer wall towards the outer side of the body, and the second deformation part is smoothly connected with the outer wall.
In some embodiments of the invention, the deformation structure comprises:
a first deformation portion which is a recess of the outer wall toward the inside;
the second deformation part is a bulge of the outer wall towards the outer side of the body;
the second deformation part is smoothly connected with the first deformation part, and the second deformation part and the first deformation part are smoothly connected with other positions of the outer wall.
In some embodiments of the invention, the deformation structure is provided with at least one.
In some embodiments of the invention, the first deformation is an arc-shaped depression with a radius of 500mm to 1000 mm.
In some embodiments of the invention, the second deformation is an arc-shaped protrusion with a radius of 500mm to 1000 mm.
A second aspect of the present invention provides an engine, including a cylinder block and the dry cylinder liner in any one of the above technical solutions, where the dry cylinder liner is disposed in the cylinder block.
The engine of the embodiment of the invention has the same advantages as the dry cylinder liner in any one of the technical schemes, and the description is omitted.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic cross-sectional view of an embodiment of a dry cylinder liner according to an embodiment of the present invention;
fig. 2 is a cross-sectional schematic view of another embodiment of the dry cylinder liner shown in fig. 1;
fig. 3 is a cross-sectional schematic view of another embodiment of the dry cylinder liner shown in fig. 1;
fig. 4 is a schematic view of an initial state and actual deformation of the dry cylinder liner shown in fig. 1;
fig. 5 is a schematic diagram of actual deformation of the dry cylinder liner shown in fig. 4 at different angles;
fig. 6 is a graph comparing the effects of the dry cylinder liner shown in fig. 1 with and without a deformed structure.
Reference numerals:
1. a body;
2. a deformed configuration; 21. a first deformation portion; 22. a second deformation portion.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The initial state and the actual deformation of the dry cylinder liner are shown simultaneously in fig. 4, the two lines in fig. 5 represent the deformation of the dry cylinder liner of 45 °/225 ° and the deformation of the dry cylinder liner of 135 °/315 °, respectively, and the more gentle curve in fig. 6 is the deformation of the dry cylinder liner having a deformed structure and the more tortuous is the deformation of the dry cylinder liner having no deformed structure.
Fig. 6 is a graph in a practical case, and the embodiment of the present invention is structurally simplified in describing the structure of the dry cylinder liner.
As shown in fig. 1 to 6, a dry cylinder liner according to one embodiment of the present invention includes a body 1 and a deformation structure 2, the body 1 has a cylindrical hole inside, the cylindrical hole is engaged with a piston of an engine, the deformation structure 2 is formed on an outer wall of the body 1, and the deformation structure 2 is configured to match a cylinder block of the deformed engine.
According to the dry cylinder sleeve of the embodiment of the invention, in order to enhance heat transfer as much as possible and reduce the wall thickness as much as possible, after the cylinder sleeve is assembled on a cylinder body, the wall thickness is too small, and the cylinder sleeve is easy to be squeezed and deformed, so that the outer wall of the cylinder sleeve is processed by the deformation structure 2, the deformation structure is suitable for the deformation of the cylinder body of an engine, the design of the deformation structure provides a pre-deformation amount for the dry cylinder sleeve, the processing of the deformation structure 2 is matched with the actual deformation curve of the cylinder sleeve, the actual deformation curve is obtained through simulation calculation, when the engine deforms, the deformation structure 2 can counteract partial deformation of the cylinder body, the acting force is prevented from being transferred to the inner wall of the cylinder sleeve and the cylinder sleeve is prevented from deforming, the inside of the body 1 is a cylindrical hole, the cylindrical hole is matched with a piston and a piston ring, and the, the problems of high machine consumption, large air leakage and the like caused by the problems of the incapability of effectively matching the piston with the cylinder body, the abrasion of a piston ring, the cylinder pulling and the like are solved.
The size of the accelerating structure considers the deformation when the accelerating structure is assembled with the cylinder body, and also considers the deformation when the cylinder cover and the cylinder body are assembled by bolts, and the unilateral deformation is generally 0.02-0.03 mm.
In some embodiments of the present invention, for different engines, the deformation of the cylinder block is different, and the structure of the dry cylinder liner corresponding to the first deformation condition is now described, where the deformation of the cylinder block is convex, the deformation structure 2 includes a first deformation portion 21, the first deformation portion 21 is formed by recessing the outer wall toward the inside, and when the cylinder head and the dry cylinder liner are assembled with the cylinder block respectively and subjected to an acting force to make them generate convex deformation, the cylinder head and the dry cylinder liner can be matched with the recessed first deformation portion 21 to counteract the deformation, so as to avoid the acting force from being transmitted to the inner wall of the dry cylinder liner, and the first deformation portion 21 is smoothly connected with other positions of the outer wall, thereby avoiding the occurrence of sharp scratch on the cylinder liner or an operator, and facilitating.
The number of the first deformation portions 21 is not limited to one, and is determined according to the actual deformation of the cylinder.
In some embodiments of the present invention, the deformation structure 2 includes a second deformation portion 22, the second deformation portion 22 is formed by a protrusion of an outer wall toward an outer side of the body 1, when the cylinder cover and the dry cylinder liner are assembled with the cylinder body respectively, and the cylinder cover and the dry cylinder liner are subjected to a concave deformation by an acting force, the cylinder cover and the dry cylinder liner can be matched with the second deformation portion 22 to offset the deformation, so as to prevent the acting force from being transmitted to an inner wall of the dry cylinder liner, the second deformation portion 22 is smoothly connected with other positions of the outer wall, so as to prevent the cylinder liner from being scratched sharply or an operator, and the cylinder liner is convenient to process.
The number of the second deformation portions 22 is not limited to one, and is determined according to the actual deformation of the cylinder.
In some embodiments of the present invention, for the deformation of the cylinder body is a wave shape, the deformation structure 2 includes a first deformation portion 21 and a second deformation portion 22, the first deformation portion 21 is formed by an outer wall that is recessed inward, the second deformation portion 22 is formed by an outer wall that is raised outward from the body 1, the first deformation portion 21 and the second deformation portion 22 are connected to form a wave shape, the body 1 and the cylinder body are matched through the wave shape to offset the deformation, so as to avoid the acting force from being transmitted to the inner wall of the dry cylinder liner, the first deformation portion 21 and the second deformation portion 22 are connected in a smooth transition manner, and both the first deformation portion 21 and the second deformation portion 22 are connected with other positions of the outer wall smoothly, so as to avoid the occurrence of sharp scratch on the cylinder liner or an operator, and.
The number of the first deforming part 21 and the second deforming part 22 is not limited to one, and may be determined according to the actual deformation of the cylinder, and may be a combination of the first deforming part 21, the second deforming part 22, and the first deforming part 21, a combination of the second deforming part 22, the first deforming part 21, and the second deforming part 22, or may be provided at intervals of the same number of first deforming parts 21 and second deforming parts 22, which is not limited herein.
Wherein, the deformation structure 2 is not limited to the three forms, the deformation structure 2 is matched with the actual deformation of the cylinder body, and the range of the deformation structure 2 is 10-20 mm.
In some embodiments of the invention, the first deformation 21 and the second deformation 22 are both arc-shaped, matching the actual deformation of the cylinder, with a radius of 500mm-1000 mm.
Another embodiment of the present invention further provides an engine, including a cylinder block and the dry cylinder liner in any of the above embodiments, wherein the dry cylinder liner is disposed in the cylinder block.
The engine of the embodiment of the invention has the same advantages as the dry cylinder liner in any one of the technical schemes, and the description is omitted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. A dry cylinder liner, comprising:
the engine comprises a body, wherein a cylindrical hole is formed in the body and is matched with a piston of the engine;
a deformation structure formed on an outer wall of the body and configured to match a cylinder of the engine after deformation, the deformation structure comprising:
the first deformation part is an arc-shaped recess of the outer wall towards the inner part;
the second deformation part is an arc-shaped bulge of the outer wall towards the outer side of the body;
the second deformation part is smoothly connected with the first deformation part, and the second deformation part and the first deformation part are smoothly connected with other positions of the outer wall.
2. The dry cylinder liner according to claim 1, characterized in that the deforming structure is provided with at least one.
3. The dry cylinder liner according to claim 1, characterized in that the radius of the first deformation portion is 500mm-1000 mm.
4. The dry cylinder liner according to claim 1, characterized in that the radius of the second deformation portion is 500mm-1000 mm.
5. An engine, comprising:
a cylinder body;
a dry cylinder liner provided in the cylinder block, the dry cylinder liner being the dry cylinder liner according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040350.XA CN110700959B (en) | 2019-10-29 | 2019-10-29 | Dry-type cylinder jacket and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040350.XA CN110700959B (en) | 2019-10-29 | 2019-10-29 | Dry-type cylinder jacket and engine |
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| Publication Number | Publication Date |
|---|---|
| CN110700959A CN110700959A (en) | 2020-01-17 |
| CN110700959B true CN110700959B (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911040350.XA Active CN110700959B (en) | 2019-10-29 | 2019-10-29 | Dry-type cylinder jacket and engine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6185557A (en) * | 1984-10-04 | 1986-05-01 | Yanmar Diesel Engine Co Ltd | Construction of cylinder liner of multicylinder internal combustion engine |
| CN1308183A (en) * | 2000-02-08 | 2001-08-15 | 本田技研工业株式会社 | Sleeve structure of cylinder body |
| CN2767682Y (en) * | 2004-01-09 | 2006-03-29 | 丰田自动车株式会社 | Cylinder liner for insert casting |
| CN103890361A (en) * | 2011-12-22 | 2014-06-25 | 日产自动车株式会社 | Method for manufacturing cylinder block, and cylinder block |
| JP2015151984A (en) * | 2014-02-19 | 2015-08-24 | 富士重工業株式会社 | engine |
| JP2019127837A (en) * | 2018-01-22 | 2019-08-01 | トヨタ自動車株式会社 | Processing method of cylinder bore |
-
2019
- 2019-10-29 CN CN201911040350.XA patent/CN110700959B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6185557A (en) * | 1984-10-04 | 1986-05-01 | Yanmar Diesel Engine Co Ltd | Construction of cylinder liner of multicylinder internal combustion engine |
| CN1308183A (en) * | 2000-02-08 | 2001-08-15 | 本田技研工业株式会社 | Sleeve structure of cylinder body |
| CN2767682Y (en) * | 2004-01-09 | 2006-03-29 | 丰田自动车株式会社 | Cylinder liner for insert casting |
| CN103890361A (en) * | 2011-12-22 | 2014-06-25 | 日产自动车株式会社 | Method for manufacturing cylinder block, and cylinder block |
| JP2015151984A (en) * | 2014-02-19 | 2015-08-24 | 富士重工業株式会社 | engine |
| JP2019127837A (en) * | 2018-01-22 | 2019-08-01 | トヨタ自動車株式会社 | Processing method of cylinder bore |
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| CN110700959A (en) | 2020-01-17 |
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