CN217421367U

CN217421367U - Cylinder sleeve structure

Info

Publication number: CN217421367U
Application number: CN202220528593.9U
Authority: CN
Inventors: 丘道龙; 覃壮革; 廖升友; 沈捷
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-09-13
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses a cylinder jacket structure, include: the air cylinder sleeve comprises an upper portion of the air cylinder sleeve, a lower portion of the air cylinder sleeve, a supporting step, an O-shaped ring groove and a plurality of scavenging holes. The lower portion of the cylinder sleeve is arranged below the upper portion of the cylinder sleeve, and the lower portion of the cylinder sleeve and the upper portion of the cylinder sleeve are coaxially arranged. The support step is disposed above an upper portion of the cylinder liner. The O-shaped ring groove is arranged between the upper part of the cylinder sleeve and the lower part of the cylinder sleeve. And the plurality of scavenging holes are uniformly formed in the lower part of the cylinder sleeve and used for scavenging the engine. The height of the plurality of scavenging holes on the lower part of the cylinder sleeve is positioned at the position of the bottom dead center of the piston. Therefore, the utility model discloses a cylinder jacket structure, simple structure is reasonable, can satisfy the demand of two-stroke engine scavenging capacity.

Description

Cylinder sleeve structure

Technical Field

The utility model relates to a two-stroke engine technical field especially relates to a cylinder jacket structure.

Background

With the improvement of the requirements of the social and economic activities on the dynamic property, the economical efficiency, the adaptability and the like of the vehicle, the light weight, the safety, the applicability and the dynamic property of the vehicle and parts thereof become a promotion direction which gets a great attention. The current cylinder liner structure all is single structure, either wet-type, or dry-type, does not have the cylinder liner structure who is applicable to two-stroke engine to can't satisfy two-stroke engine's scavenging capacity demand.

Aiming at the defect that the cylinder sleeve structure of the existing two-stroke diesel engine is not adaptive, a new cylinder sleeve structure is urgently needed to solve the defect.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cylinder liner structure, simple structure is reasonable, can satisfy the demand of two-stroke engine scavenging capacity.

In order to achieve the above object, the utility model provides a cylinder jacket structure, include: the air cylinder sleeve comprises an upper portion of the air cylinder sleeve, a lower portion of the air cylinder sleeve, a supporting step, an O-shaped ring groove and a plurality of scavenging holes. The lower portion of the cylinder sleeve is arranged below the upper portion of the cylinder sleeve, and the lower portion of the cylinder sleeve and the upper portion of the cylinder sleeve are coaxially arranged. The support step is disposed above an upper portion of the cylinder liner. The O-shaped ring groove is arranged between the upper part of the cylinder sleeve and the lower part of the cylinder sleeve. And the plurality of scavenging holes are uniformly formed in the lower part of the cylinder sleeve and used for scavenging the engine. The height of the plurality of scavenging holes on the lower part of the cylinder sleeve is positioned at the position of the bottom dead center of the piston.

In one or more embodiments, the cylinder liner structure further includes an O-ring disposed in the O-ring groove.

In one or more embodiments, the number of the plurality of scavenging holes is nine, and the nine scavenging holes are uniformly provided on one side of the lower portion of the cylinder liner.

In one or more embodiments, each scavenging hole has a width of 8 mm and a height of 20 mm.

In one or more embodiments, the opening direction center line of the scavenging hole is tangent to a circle half the diameter of the cylinder bore.

In one or more embodiments, the two scavenging holes have a centerline angle of 18 degrees.

Compared with the prior art, according to the utility model discloses a cylinder liner structure, simple structure is reasonable, can satisfy the demand of two-stroke engine scavenging capacity.

Drawings

Fig. 1 is a schematic front view of a cylinder liner structure according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structural view of a cylinder liner structure according to an embodiment of the present invention.

Description of the main reference numbers:

1-upper part of cylinder jacket, 2-lower part of cylinder jacket, 3-supporting step, 4-scavenging hole and 5-O-shaped ring groove.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Fig. 1 is a schematic front view of a cylinder liner structure according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional structural view of a cylinder liner structure according to an embodiment of the present invention.

As shown in fig. 1 to 2, a cylinder liner structure according to an embodiment of the present invention includes: the cylinder liner comprises a cylinder liner upper part 1, a cylinder liner lower part 2, a supporting step 3, an O-shaped ring groove 5 and a plurality of scavenging holes 4. The cylinder liner lower portion 2 is disposed below the cylinder liner upper portion 1, and the cylinder liner lower portion 2 is disposed coaxially with the cylinder liner upper portion 1. The support step 3 is provided above the cylinder liner upper portion 1. The O-ring groove 5 is provided between the cylinder liner upper portion 1 and the cylinder liner lower portion 2. And the plurality of scavenging holes 4 are uniformly arranged on the lower part 2 of the cylinder sleeve, and the plurality of scavenging holes 4 are used for scavenging the engine. The height of the plurality of scavenging holes 4 on the lower part 2 of the cylinder sleeve is positioned at the position of the bottom dead center of the piston.

In one or more embodiments, the cylinder liner structure further includes an O-ring seal disposed in the O-ring groove 5.

In one or more embodiments, the number of the plurality of scavenging holes 4 is nine, and the nine scavenging holes 4 are uniformly provided on one side of the liner lower portion 2. Each scavenging hole 4 has a width of 8 mm and a height of 20 mm.

In one or more embodiments, the opening direction center line of the scavenging hole 4 is tangent to a circle that is half the cylinder bore diameter. The central line included angle of the two scavenging holes 4 is 18 degrees.

In practical application, the utility model discloses a cylinder jacket structure is a wet cylinder jacket, and the cylinder jacket includes cylinder jacket upper portion 1, cylinder jacket lower part 2, supports step 3, O type circle groove 5 and scavenging hole 4. The wet cylinder sleeve mainly comprises a seal and a supporting piston which do mechanical motion such as up-down acting and the like, and the second stroke of the two-stroke engine is as follows: the piston moves from the top dead center to the bottom dead center. When the compression process is finished, high-pressure diesel oil is sprayed into the cylinder through the oil sprayer and is automatically ignited and combusted. The high-temperature and high-pressure combustion gas pushes the piston to do work. When the piston moves down 2/3 stroke, the exhaust valve is opened, and the exhaust gas is discharged through the exhaust valve. The piston continues moving downwards, the air inlet hole is opened, and air from the scavenging pump enters the air cylinder through the air inlet hole to scavenge. The scavenging process continues until the intake port is closed as the piston moves upward.

As shown in fig. 2, the scavenging hole 4 of the internal structure of the scavenging hole 4 on the cylinder liner lower part 2 is opened at one side of the cylinder liner lower part 2, the height direction is at the position of the lower dead point of the piston, the width is 8 mm, the height is 20 mm, and the central connecting line of the opening direction is tangent to a semicircle of the inner hole diameter of the cylinder. Nine scavenging holes 4 are formed, and the included angle between the central lines of the two holes is degree, so that the scavenging capacity requirement of the two-stroke engine can be met.

In a word, the utility model discloses a cylinder jacket structure, simple structure is reasonable, can satisfy the demand of two-stroke engine scavenging capacity.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A cylinder liner structure, characterized by comprising:

an upper portion of the cylinder liner;

the lower part of the cylinder sleeve is arranged below the upper part of the cylinder sleeve, and the lower part of the cylinder sleeve and the upper part of the cylinder sleeve are coaxially arranged;

a support step provided above an upper portion of the cylinder liner;

the O-shaped ring groove is arranged between the upper part of the cylinder sleeve and the lower part of the cylinder sleeve; and

the plurality of scavenging holes are uniformly formed in the lower part of the cylinder sleeve and are used for scavenging air of the engine;

wherein the height of the plurality of scavenging holes on the lower part of the cylinder sleeve is at the position of the piston bottom dead center.

2. The cylinder liner structure according to claim 1, further comprising an O-ring disposed in the O-ring groove.

3. The cylinder liner structure according to claim 1, characterized in that the plurality of scavenging holes are nine in number, and nine scavenging holes are uniformly provided on one side of the cylinder liner lower portion.

4. A cylinder liner structure according to claim 3, wherein each of the scavenging holes has a width of 8 mm and a height of 20 mm.

5. The cylinder liner structure according to claim 3, wherein the opening direction center line of the scavenging hole is tangent to a circle of half of the cylinder bore diameter.

6. The cylinder liner structure according to claim 3, wherein the included angle between the center lines of the two scavenging holes is 18 degrees.