CN213478502U - Cylinder sleeve and engine - Google Patents

Abstract

The utility model belongs to the technical field of the engine, concretely relates to cylinder liner and engine. The utility model provides an inside of cylinder liner is equipped with the jar hole, the inner wall profile that the jar hole is located the top dead center is oval, just oval minor axis direction with the thermal expansion direction in jar hole is unanimous. Through using the cylinder liner among this technical scheme, the inner wall profile that the cylinder hole is located the top dead center is oval, and oval minor axis direction is unanimous with the thermal expansion direction in cylinder hole, and oval inside profile can offset the elliptical deformation of cylinder liner under the detonation pressure and the heat load that bear in the engine working process, guarantees that piston ring and cylinder liner carry out better laminating in the engine working process, reduces the air leakage and the higher problem of machine oil consumption of appearing.

Description

Cylinder sleeve and engine

Technical Field

The utility model belongs to the technical field of the engine, concretely relates to cylinder liner and engine.

Background

The cylinder sleeve of the engine can deform in the working process of the high-detonation pressure engine, the deformation amount changes along with the height of the cylinder sleeve, and the maximum deformation amount of a cylinder hole usually appears above the cylinder sleeve. More than 80% of air leakage in the engine cylinder is generated when the piston ring runs to the position near the top dead center, and the top dead center position of the piston ring is 8mm-30mm above the cylinder sleeve. The larger deflection that appears above the cylinder liner in the engine working process can directly lead to the piston ring to close the clearance grow in the course of the work to lead to the interior gas leakage grow of engine cylinder.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the air leakage quantity caused by the deformation of the cylinder sleeve is increased at least. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides a cylinder liner, the inside of cylinder liner is equipped with the jar hole, the inner wall profile that the jar hole is located the top dead center is oval, just oval-shaped minor axis direction with the thermal expansion direction in jar hole is unanimous.

Through using the cylinder liner among this technical scheme, the inner wall profile that the cylinder hole is located the top dead center is oval, and oval minor axis direction is unanimous with the thermal expansion direction in cylinder hole, and oval inside profile can offset the elliptical deformation of cylinder liner under the detonation pressure and the heat load that bear in the engine working process, guarantees that piston ring and cylinder liner carry out better laminating in the engine working process, reduces the air leakage and the higher problem of machine oil consumption of appearing.

In addition, according to the utility model discloses a cylinder liner still can have following additional technical characterstic:

the utility model discloses an in some embodiments, the cylinder hole includes first hole portion, transition portion and the second hole portion that from top to bottom sets gradually, transition portion includes top dead center and being located the upper and lower both sides of top dead center are close to the region of top dead center, the shape of transition portion is oval.

In some embodiments of the present invention, the inner diameter of the transition portion gradually increases from the upper dead point to the upper and lower sides.

In some embodiments of the present invention, the first and second hole portions have the same inner diameter dimension.

In some embodiments of the invention, the minor axis inner diameter dimension of the transition portion is less than the inner diameter dimension of the first bore portion.

In some embodiments of the invention, an absolute value of a difference between the minor axis inner diameter dimension of the transition portion and the inner diameter dimension of the first bore portion is less than 0.1 mm.

In some embodiments of the present invention, the height of the transition portion is 1/3-1/2 of the overall cylinder liner height.

The utility model also provides an engine, this engine includes the cylinder liner in the above-mentioned embodiment.

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 parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows a schematic structural cross-sectional view of a cylinder liner according to an embodiment of the present invention;

FIG. 2 is a cross-sectional top view of the transition portion of the cylinder liner of FIG. 1.

1: a cylinder liner;

10: cylinder bore, 11: first hole portion, 12: transition part, 121: top dead center, 13: a second hole 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. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

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.

Fig. 1 schematically shows a schematic structural cross-sectional view of a cylinder liner according to an embodiment of the present invention. As shown in figure 1, the utility model provides a cylinder liner and engine. The utility model provides an inside of cylinder liner 1 is equipped with jar hole 10, and the inner wall profile that jar hole 10 is located top dead center 121 is oval, and oval-shaped minor axis direction is unanimous with jar hole 10's thermal expansion direction.

Through using the cylinder liner among this technical scheme, the inner wall profile that cylinder hole 10 is located top dead center 121 is oval, and oval minor axis direction is unanimous with the thermal expansion direction in cylinder hole 10, and oval-shaped internal profile can offset the elliptical deformation of cylinder liner 1 under the detonation pressure and the heat load that bear in the engine working process, guarantees that the piston ring carries out better laminating with cylinder liner 1 in the engine working process, reduces the gas leakage and the higher problem of machine oil consumption to appear.

Further, in this embodiment, cylinder hole 10 includes first hole portion 11, transition portion 12 and the second hole portion 13 that from top to bottom sets gradually, and transition portion 12 includes top dead center 121 and is located the upper and lower both sides of top dead center 121 and is close to the region of top dead center 121, and transition portion 12 shape is oval, can guarantee that the piston ring carries out better laminating with cylinder liner 1 cylinder hole 10 inside in the engine working process, reduces the problem that air leakage and machine oil consume are higher. The transition portion 12 in the present embodiment is located at the upper end position of the entire cylinder liner 1.

Specifically, in the present embodiment, in some embodiments of the present invention, the inner diameter of the transition portion 12 gradually increases from the upper dead point 121 to the upper and lower sides. Therefore, the deformation of the transition part 12 in the deformation process is more moderate, the problems of air leakage and high oil consumption are solved, and the flexibility of the transition part 12 in the deformation process is improved.

Specifically, in the present embodiment, the first hole portion 11 and the second hole portion 13 have the same diameter, and the amount of deformation of the first hole portion 11 and the second hole portion 13 is small as seen from the amount of deformation in the axial direction of the liner 1, so it is sufficient to keep the original diameter, and the machining is facilitated.

Specifically, in the present embodiment, the diameter dimension of the transition portion 12 is smaller than the diameter dimension of the first hole portion 11. The molded line design is also carried out on the inner axis direction of the cylinder sleeve 1, so that the position above the cylinder sleeve 1 can generate smaller deformation in the working process of the engine, the closed gap of a piston ring in the working process of the engine is reduced, and the air leakage of the engine is reduced.

Specifically, in this embodiment, the specific value of the elliptical line may be determined according to the actual second-order deformation of the cylinder liner 1, and preferably, the absolute value of the difference between the diameter of the transition portion 12 and the diameter of the first hole portion 11 is smaller than 0.1mm, so that the piston ring can be effectively attached to the cylinder liner 1 in the working process of the engine, and the problems of air leakage and high oil consumption are avoided.

Further, in the embodiment, the specific value of the elliptic molded line can be determined according to the actual second-order deformation of the cylinder liner 1, preferably, the height of the transition part 12 is 1/3-1/2 of the overall height of the cylinder liner 1, so that better fitting between a piston ring and the cylinder liner 1 in the working process of an engine can be effectively ensured, and the problems of air leakage and high oil consumption are avoided.

The utility model also provides an engine, cylinder liner more than including.

Through using the engine among this technical scheme, the inner wall profile that the cylinder hole is located the top dead center is oval, and oval minor axis direction is unanimous with the thermal expansion direction in cylinder hole, and oval inside profile can offset the elliptical deformation of cylinder liner under the detonation pressure and the heat load that bear in the engine working process, guarantees that piston ring and cylinder liner carry out better laminating in the engine working process, reduces the air leakage and the higher problem of machine oil consumption of appearing.

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 should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The cylinder sleeve is characterized in that a cylinder hole is formed in the cylinder sleeve, the outline of the inner wall of the cylinder hole, which is located at the top dead center, is elliptical, and the minor axis direction of the ellipse is consistent with the thermal expansion direction of the cylinder hole.

2. The cylinder liner as claimed in claim 1, wherein the cylinder bore includes a first bore portion, a transition portion and a second bore portion arranged in sequence from top to bottom, the transition portion includes the top dead center and regions located at upper and lower sides of the top dead center and near the top dead center, and the transition portion is elliptical in shape.

3. The cylinder liner as recited in claim 2, wherein the transition portion has an inner diameter that increases from the top dead center to upper and lower sides.

4. The cylinder liner as in claim 2, wherein the inner diameters of the first and second bore portions are the same size.

5. The cylinder liner as defined in claim 4, wherein the minor axis inner diameter dimension of the transition portion is less than the inner diameter dimension of the first bore portion.

6. The cylinder liner as defined in claim 5, wherein the minor axis inner diameter dimension of the transition portion differs from the inner diameter dimension of the first bore portion by an absolute value of less than 0.1 mm.

7. The cylinder liner as in claim 2, wherein the height of the transition portion is 1/3-1/2 of the overall height of the cylinder liner.

8. An engine characterized by a cylinder liner according to any one of claims 1-7.

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