CN216157770U - Cylinder sleeve and engine - Google Patents

Abstract

The utility model relates to a cylinder sleeve and an engine, belonging to the technical field of engines, and comprising a cylinder sleeve body, wherein the cylinder sleeve body is arranged in a cylinder hole of an engine body, the cylinder sleeve body is sequentially provided with a first sleeve body part and a second sleeve body part from top to bottom, the first sleeve body part and the second sleeve body part are mutually connected, the outer diameters of the first sleeve body part and the second sleeve body part are gradually reduced from top to bottom, the outer wall of the first sleeve body part is in interference fit with the inner wall of the cylinder hole, and the outer wall of the second sleeve body part is in clearance fit with the inner wall of the cylinder hole. The utility model has the effects of solving the problems of low cooling effect and energy waste of the cylinder sleeve.

Description

Cylinder sleeve and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a cylinder sleeve and an engine with the same.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

When the engine works, the oil-gas mixture is continuously compressed and exploded in the cylinder sleeve, so that the working temperature of the cylinder sleeve is very high, measures must be taken to cool the cylinder sleeve, and otherwise, the engine cannot work normally.

The operating region of the piston on the cylinder liner of the existing engine can be roughly divided into three parts, namely, a region near the top dead center, a region near the bottom dead center and a middle transition region. The area near the top dead center is the area with the highest temperature, and the area on the cylinder sleeve needs to provide good cooling conditions, so that the condition that the piston ring and the cylinder sleeve are dry-rubbed due to high-temperature failure of engine oil is avoided. As the piston moves downwards and is farther away from the combustion chamber, the temperature of the piston is lower, and the cooling requirement of the corresponding position of the cylinder sleeve is reduced. But the outer wall of the existing cylinder sleeve is of a cylindrical structure, the upper part, the middle part and the lower part are attached to the machine body uniformly, so that the heat transfer is the same, and the upper part cooling is not enhanced while partial energy is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve the problems of low cooling effect and energy waste of a cylinder sleeve. The purpose is realized by the following technical scheme:

the first aspect of the utility model provides a cylinder sleeve, which comprises a cylinder sleeve body, wherein the cylinder sleeve body is installed in a cylinder hole of a machine body, the cylinder sleeve body is sequentially provided with a first sleeve body part and a second sleeve body part from top to bottom, the first sleeve body part and the second sleeve body part are connected with each other, the outer diameters of the first sleeve body part and the second sleeve body part are gradually reduced from top to bottom, the outer wall of the first sleeve body part is in interference fit with the inner wall of the cylinder hole, and the outer wall of the second sleeve body part is in clearance fit with the inner wall of the cylinder hole.

According to the cylinder sleeve, the cylinder sleeve body is divided into a first sleeve body part and a second sleeve body part according to the functional difference requirements of heat transfer and cooling of different areas of an engine body, the outer diameters of the first sleeve body part and the second sleeve body part are gradually reduced from top to bottom to form a micro-inclination-angle structure from top to bottom, the outer wall of the first sleeve body part is in interference fit with the inner wall of a cylinder hole, and the outer wall of the second sleeve body part is in clearance fit with the inner wall of the cylinder hole; first cover somatic part and organism contact closely, improve the heat transfer rate, increase cooling capacity, the second cover somatic part passes through the middle space with the organism, reduces the waste of energy, and the low and extravagant problem of energy of cylinder jacket cooling effect has been solved in the setting of the little inclination structure of first cover somatic part and second cover somatic part.

In addition, the cylinder liner according to the present invention may have the following additional technical features:

in some embodiments of the utility model, the interference of the interference fit is 0.01-0.02 mm.

In some embodiments of the utility model, the clearance fit has a clearance amount of 0.01-0.02 mm.

In some embodiments of the present invention, the liner body is further provided with a third sleeve portion, the third sleeve portion is disposed between the first sleeve portion and the second sleeve portion, and an outer wall of the third sleeve portion is in transition fit with an inner wall of the cylinder bore.

In some embodiments of the present invention, the transition amount of the transition fit is-0.01 mm to 0.01 mm.

In some embodiments of the present invention, the first sleeve portion is located at a top dead center of the cylinder liner, the second sleeve portion is located at a bottom dead center of the cylinder liner, and the third sleeve portion is located between the top dead center and the bottom dead center.

In some embodiments of the present invention, the first sleeve portion, the second sleeve portion, and the third sleeve portion form three discontinuous slopes distributed in an axial direction on the outer wall of the cylinder liner.

In some embodiments of the present invention, the first sleeve portion, the second sleeve portion, and the third sleeve portion form a consecutive segment of slopes distributed in an axial direction on an outer wall of the cylinder liner.

Another aspect of the utility model provides an engine comprising

The cylinder body is provided with a cylinder hole;

the cylinder liner, the cylinder liner is installed in the cylinder bore, the cylinder liner be any above-mentioned embodiment the cylinder liner.

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 utility model. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 is a schematic view of the entire structure of a cylinder liner of the present application;

FIG. 2 is a schematic view of the cylinder liner of FIG. 1 in a mated configuration with the engine block;

FIG. 3 is a schematic structural view of the outer wall of the cylinder liner of FIG. 1;

FIG. 4 is a schematic view of the combination of the outer wall of the cylinder liner of FIG. 3 with the engine block;

fig. 5 is a schematic view of another construction of a slight inclination angle of the outer wall of the cylinder liner according to the present application;

FIG. 6 is a schematic view of the combination of the outer wall of the cylinder liner of FIG. 5 and the engine block.

Reference numerals:

100. a cylinder liner;

1. a cylinder liner body; 10. a first sleeve portion; 11. a second sleeve portion; 12. a third sleeve portion; 2. a body; 3. a support shoulder; 4. and (7) a shoulder.

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.

As shown in fig. 1 to 4, according to an embodiment of the present invention, a cylinder liner is provided, including a liner body 1, the liner body 1 is installed in a cylinder bore of a machine body 2, the liner body 1 is sequentially provided with a first liner portion 10 and a second liner portion 11 from top to bottom, the first liner portion 10 and the second liner portion 11 are connected to each other, outer diameters of the first liner portion 10 and the second liner portion 11 are gradually reduced from top to bottom, an outer wall of the first liner portion 10 is in interference fit with an inner wall of the cylinder bore, and an outer wall of the second liner portion 11 is in clearance fit with the inner wall of the cylinder bore.

Specifically, the cylinder bore is a cylindrical hole shape, and the cylinder liner body 1 can be inserted into the cylinder bore. According to the functional difference requirements of heat transfer and cooling of different regions of the engine body 2, the cylinder sleeve body 1 is divided into a first sleeve body part 10 and a second sleeve body part 11 from top to bottom, and the outer diameters of the first sleeve body part 10 and the second sleeve body part 11 are gradually reduced from top to bottom to form a stage slight inclination angle structure from top to bottom. The first sleeve part 10 is positioned near the top dead center of a piston in the cylinder sleeve body 1, the section is closest to a combustion chamber, and the temperature is also highest, so that the best cooling condition is required; therefore, through the micro-inclination angle structure of the first sleeve part 10, the outer wall of the first sleeve part 10 is in interference fit with the inner wall of the cylinder hole, the first sleeve part 10 is in close contact with the engine body 2, the heat transfer rate is improved, the cooling capacity is increased, and the temperature is not over-limited.

The second sleeve part 11 is positioned near the bottom dead center of the piston in the cylinder sleeve body 1, and the section is farthest from the combustion chamber and has the lowest temperature, so the cooling requirement of the section is also lowest; therefore, through the micro-inclination angle structure of the second sleeve part 11, the outer wall of the second sleeve part 11 is in clearance fit with the inner wall of the cylinder hole, and the second sleeve part 11 and the machine body 2 pass through the middle gap, so that the energy waste can be reduced. The arrangement of the micro-inclination structure of the first sleeve portion 10 and the second sleeve portion 11 solves the problems of low cooling effect and energy waste of the cylinder liner 100.

In some embodiments of the utility model, the interference of the interference fit is 0.01-0.02 mm. The outer diameter of the first sleeve portion 10 is set to be larger than the inner diameter of the cylinder bore by 0.01 to 0.02mm, so that the outer wall of the first sleeve portion 10 can be tightly combined with the inner wall of the cylinder bore. The interference fit between the cylinder sleeve body 1 and the engine body 2 is ensured, the heat transfer rate can be improved, the cooling capacity is increased, the temperature is not over-limit,

in some embodiments of the utility model, the clearance fit is 0.01-0.02 mm. The outer diameter of the second sleeve part 11 is set to be smaller than the inner diameter of the cylinder hole by 0.01-0.02 mm, and the outer wall of the second sleeve part 11 can be in clearance fit with the inner wall of the cylinder hole. When guaranteeing that cylinder liner body 1 and organism 2 are clearance fit, can also be through the space in the middle of, with cylinder liner body 1 and organism 2 part isolated, save energy by a wide margin.

In some embodiments of the present invention, as shown in fig. 1 to 4, the liner body 1 is further provided with a third sleeve portion 12, the third sleeve portion 12 is disposed between the first sleeve portion 10 and the second sleeve portion 11, and an outer wall of the third sleeve portion 12 is in transition fit with an inner wall of the cylinder bore. The third sleeve portion 12 is located in the transition region from the top dead center to the bottom dead center of the piston, which is relatively far from the combustion chamber and is at a relatively low temperature, so that it does not require excessive cooling. And the external diameter size of the third sleeve part 12 is consistent with the size of the conventional cylinder sleeve, so that the tolerance of the third sleeve part 12 is ensured to form transition fit with the engine body 2 through the micro-inclination angle structure of the third sleeve part, the cylinder sleeve and the engine body 2 are ensured to be cooled, excessive cooling is avoided, and energy loss is reduced.

In some embodiments of the present invention, the transition amount of the transition fit is-0.01 to 0.01 mm. The outer diameter of the third sleeve part 12 is set to be within the range of-0.01 mm to 0.01mm, so that the third sleeve part 12 can be in interference fit, transition fit or clearance fit, and the transition stage of the third sleeve part 12 can be flexibly provided in the region according to the actual situation.

In some embodiments of the present invention, as shown in fig. 2 to 4, the first sleeve portion 10 is located at the top dead center of the cylinder liner 100, the second sleeve portion 11 is located at the bottom dead center of the cylinder liner 100, and the third sleeve portion 12 is located between the top dead center and the bottom dead center.

Further, the first, second and third sleeve portions 10, 11 and 12 form three discontinuous slopes distributed in the axial direction on the outer wall of the cylinder liner 100.

Specifically, divide into the three sections of interconnect with cylinder jacket 100 outer wall, cylinder jacket 100 assembles the back on organism 2, and first cover somatic part 10 is located near piston top dead center, and second cover somatic part 11 is located near the bottom dead center, and third cover somatic part 12 is located the transition region from top dead center to bottom dead center, through the slight inclination structure, makes first cover somatic part 10 and organism 2 be interference fit, makes it and organism 2 contact closely, guarantees cylinder jacket 100 and organism 2 contact closely, improves heat transfer efficiency, increases the cooling capacity. The second sleeve part 11 is in clearance fit with the machine body 2, and the cylinder sleeve 100 is partially isolated from the machine body 2 through a middle gap, so that energy is greatly saved. The third sleeve body part 12 and the machine body 2 are in transition fit, so that the cooling requirement is ensured, the third sleeve body part is not overcooled, and the energy loss is reduced. The slight inclination angle structure is arranged on the outer wall of the cylinder liner 100, so that different areas are formed in the cooling of the cylinder liner 100, and the energy loss can be reduced while the cooling of the cylinder liner 100 is ensured.

In some embodiments of the present invention, as shown in fig. 5 to 6, the outer wall of the cylinder liner 100 may also adopt another micro-inclination manner, and the first sleeve portion 10, the second sleeve portion 11 and the third sleeve portion 12 form a continuous section of inclined surfaces distributed in the axial direction on the outer wall of the cylinder liner 100. The outer wall of the cylinder sleeve body 1 is set to be an integral micro-inclination-angle structure, and on the premise that the theoretical size is consistent up and down, the first sleeve body portion 10, the second sleeve body portion 11 and the third sleeve body portion 12 form a coherent micro-inclination-angle structure by adjusting the tolerance value.

In some embodiments of the utility model, as shown in fig. 1 to 2, the top of the liner body 1 is provided with a support shoulder 3 protruding in the radial direction.

Further, the top end surface of the support shoulder 3 is integrally formed with the top end surface of the cylinder liner body 1.

Specifically, support shoulder 3 ring is established on the outer wall at cylinder liner body 1 top, and the sealed effectual of support shoulder 3 department reduces the emergence that the accident was revealed to the coolant liquid owing to processing tool mark results in the support department of organism 2. Meanwhile, the assembly of the supporting shoulder 3 and the machine body 2 is facilitated by increasing the position of the supporting shoulder 3.

In some embodiments of the present invention, the bottom end surface of the support shoulder 3 is disposed perpendicular to the central axis of the liner body 1. The bottom surface of the supporting shoulder 3 is provided with an axis vertical to the cylinder sleeve body 1, so that the reliability and the sealing performance of assembly are improved.

In some embodiments of the utility model, the top end of the cylinder bore is provided with a shoulder 4 that mates with the support shoulder 3. Specifically, the shoulder surface of the shoulder 4 is fitted with the bottom surface of the support shoulder 3, and the support of the liner body 1 and the sealing of the cooling water cavity are achieved by providing the shoulder 4 to be fitted with the support shoulder 3.

Another aspect of the utility model provides an engine comprising

The engine body 2 is provided with an air cylinder hole;

a cylinder liner 100, the cylinder liner 100 being installed in a cylinder bore, the cylinder liner 100 being the cylinder liner 100 of any of the embodiments described above. And thus will not be described in detail.

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 claims.

Claims (9)

1. The utility model provides a cylinder jacket, includes cylinder liner body, cylinder liner body installs in the cylinder bore of organism, its characterized in that, cylinder liner body top-down has set gradually first cover somatic part and second cover somatic part, first cover somatic part with second cover somatic part hookup each other, first cover somatic part with the external diameter top-down of second cover somatic part reduces gradually, the outer wall of first cover somatic part with the inner wall interference fit in cylinder bore, the outer wall of second cover somatic part with the inner wall clearance fit in cylinder bore.

2. The cylinder liner according to claim 1, characterized in that the interference of the interference fit is 0.01 to 0.02 mm.

3. The cylinder liner according to claim 1, characterized in that the amount of clearance of the clearance fit is 0.01 to 0.02 mm.

4. The cylinder liner according to claim 1, characterized in that the liner body is further provided with a third sleeve portion, the third sleeve portion is provided between the first sleeve portion and the second sleeve portion, and an outer wall of the third sleeve portion is transition-fitted with an inner wall of the cylinder bore.

5. The cylinder liner according to claim 4, characterized in that the transition amount of the transition fit is-0.01 to 0.01 mm.

6. The cylinder liner according to claim 4, characterized in that the first sleeve portion is located at a top dead center of the cylinder liner, the second sleeve portion is located at a bottom dead center of the cylinder liner, and the third sleeve portion is located between the top dead center and the bottom dead center.

7. The cylinder liner according to claim 6, characterized in that the first, second and third sleeve portions form three abrupt slopes distributed in the axial direction at the outer wall of the cylinder liner.

8. The cylinder liner according to claim 6, characterized in that the first, second, and third sleeve portions form a consecutive segment of slopes distributed in the axial direction at the outer wall of the cylinder liner.

9. An engine, characterized by comprising

The cylinder body is provided with a cylinder hole;

a cylinder liner installed in the cylinder bore, the cylinder liner according to any one of claims 1 to 8.

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