CN217270504U

CN217270504U - Engine cylinder liner, engine and vehicle

Info

Publication number: CN217270504U
Application number: CN202123121959.5U
Authority: CN
Inventors: 王宝军; 孙晶晶; 蔡强; 孟令智
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-08-23
Anticipated expiration: 2031-12-08

Abstract

The utility model belongs to the technical field of the engine, concretely relates to engine cylinder jacket, engine and vehicle, this engine cylinder jacket include with the outer wall of engine body water jacket contact, the outer peripheral face of outer wall is provided with the edge the axial direction of engine cylinder jacket is the water conservancy diversion portion that the heliciform extends. The utility model discloses an engine cylinder cover makes the cooling water pass through the guide effect of water conservancy diversion portion, and the helix tangential direction along water conservancy diversion portion flows to the upper portion of cylinder jacket with spiral helicine route to reduce the air bubble because of the cylinder jacket vibration produces. Even if bubbles are still generated, the bubbles are guided upward along with the spiral rise of the cooling water, thereby avoiding the accumulation around the cylinder liner to cause serious cavitation failure.

Description

Engine cylinder liner, engine and vehicle

Technical Field

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

Background

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

At present, a cylinder liner applied to a wet water jacket is generally adopted by a vehicle engine, and as shown in fig. 1, an outer wall surface 1' of the cylinder liner, which is in contact with a body water jacket, is a smooth cylindrical surface. The cooling water flows out of the water pump and enters the water jacket of the engine body to cool the peripheral wall surface of the cylinder sleeve so as to reduce the temperature of the engine body and the cylinder sleeve. In the flowing process of the cooling water, the cooling water is easy to collide with the outer wall surface of the cylinder sleeve to generate bubbles, so that the cavitation corrosion failure of the cylinder sleeve is caused. Because the outer wall surface of the cylinder sleeve with the existing structure is a smooth cylinder, the air bubbles can not be guided to be discharged better, and the cavitation erosion fault is easier to occur.

Meanwhile, the temperature in the combustion chamber of the cylinder is high, so that the temperature of the contact part of the cylinder sleeve and the combustion chamber is high, and the cooling water is needed to take away more heat, so that a good cooling effect is achieved. Because the outer wall surface of the existing structure cylinder sleeve is a smooth cylindrical surface, under the condition that the flow of a water pump is not changed, the flow velocity is uniform everywhere, the better cooling of the upper part of the cylinder sleeve cannot be realized, and the reliability of a piston ring cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the cavitation failure and the poor cooling effect of the upper part of the cylinder sleeve are easy to happen to the engine cylinder sleeve in the prior art at least. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides an engine cylinder jacket, engine cylinder jacket include with the outer wall of engine organism water jacket contact, the outer peripheral face of outer wall is provided with the edge engine cylinder jacket's axial direction is the water conservancy diversion portion that the heliciform extends.

The utility model discloses an engine cylinder cover makes the cooling water pass through the guide effect of water conservancy diversion portion, and the helix tangential direction along water conservancy diversion portion flows to the upper portion of cylinder jacket with spiral helicine route to reduce the air bubble because of the cylinder jacket vibration produces. Even if bubbles are still generated, they are guided upward as the cooling water spirals up, thereby avoiding accumulation around the cylinder liner and causing serious cavitation failure.

In some embodiments of the present invention, the flow guide portion is a flow guide rib protruding outward in a radial direction from an outer peripheral surface of the engine cylinder liner.

In some embodiments of the present invention, the flow guide portion is a flow guide groove recessed inward in a radial direction from an outer peripheral surface of the engine cylinder liner.

In some embodiments of the present invention, the diversion part is located at an upper portion of the engine cylinder liner, so that a termination position of the diversion part extending upward along an axial direction of the engine cylinder liner is close to an upper opening of the engine cylinder liner.

Through the water conservancy diversion effect of water conservancy diversion muscle or guiding gutter to the cooling water, the cooling water flow increase and the velocity of flow that flow through cylinder jacket upper portion improve to accelerate the heat convection of cylinder jacket outer wall face and cooling water, make cylinder jacket upper portion cooled off more fully, thereby help the cylinder jacket temperature to reduce, improve the reliability of cylinder jacket and piston ring.

In some embodiments of the present invention, the position of the flow guide portion is set to correspond to the position of the cylinder combustion chamber.

The position corresponding to the position of the combustion chamber of the cylinder is provided with the diversion rib or the diversion trench, so that the contact part of the cylinder sleeve and the combustion chamber can be cooled more effectively, and the reliability of a piston ring is ensured.

In some embodiments of the present invention, an included angle between a tangent line of the spiral line of the guiding portion and a central axis of the cylinder liner of the engine is between 80 ° and 87 °.

By arranging the flow guide portions closely on the outer peripheral surface of the cylinder liner, the flow guide effect on the coolant can be improved, so that the generation of bubbles can be more effectively reduced and the upper portion of the cylinder liner can be more sufficiently cooled.

The second aspect of the utility model provides an engine, engine gas cover among the above-mentioned arbitrary technical scheme.

A third aspect of the present invention provides a vehicle, including the above-described engine.

According to the utility model discloses engine and vehicle and above-mentioned engine cylinder cover have the same advantage, no longer describe herein.

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 illustration of a prior art engine cylinder liner;

fig. 2 is a schematic view of an engine cylinder liner according to a first embodiment of the present invention;

fig. 3 is a schematic view of an engine cylinder liner according to a second embodiment of the present invention.

In the drawings, the reference numerals denote the following:

1', the outer wall surface of a cylinder sleeve; 1. an engine cylinder liner; 2. a flow guiding rib; 3. and a diversion trench.

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 by 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" are 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 in description, the relationship of one element or feature to another element or feature as illustrated in the figures may be described herein using spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "over", and the like. 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. 2 and 3 show according to the utility model discloses an engine cylinder liner 1, engine cylinder liner 1 include with the outer wall of engine body water jacket contact, the outer peripheral face of outer wall is provided with the water conservancy diversion portion that is the heliciform and extends along the axial direction of engine cylinder liner 1.

According to the first embodiment of the present invention, as shown in fig. 2, the flow guiding portion is a flow guiding rib 2 protruding outward in the radial direction from the outer peripheral surface of the engine cylinder liner 1.

According to a second embodiment of the present invention, as shown in fig. 3, the flow guide portion is a flow guide groove 3 recessed inward in the radial direction from the outer circumferential surface of the engine cylinder liner 1.

The cooling water enters the space between the engine body and the engine cylinder sleeve through the water inlet of the engine body by the water pump to form an engine body water jacket. As shown by arrows in fig. 1 and 2, the cooling water flows to the upper portion of the cylinder liner along a spiral tangential direction of the flow guide ribs or the flow guide grooves by a guiding function of the flow guide ribs or the flow guide grooves, so as to reduce air bubbles generated by vibration of the cylinder liner. Even if bubbles are still generated, the bubbles are guided upward along with the spiral rise of the cooling water, thereby avoiding the accumulation around the cylinder liner to cause serious cavitation failure.

According to the embodiment of the present invention, as shown in fig. 2 and 3, the flow guiding rib 2 or the flow guiding groove 3 is located on the upper portion of the engine cylinder liner 1, so that the end position of the flow guiding rib 2 or the flow guiding groove 3 extending upward along the axial direction of the engine cylinder liner 1 is close to the upper opening of the engine cylinder liner 1.

According to the utility model discloses an embodiment, the position of water conservancy diversion muscle 2 or guiding gutter 3 sets to corresponding with the position of cylinder combustion chamber.

In the running process of an engine, because the temperature in a combustion chamber of a cylinder is higher, the temperature of a contact part of a cylinder sleeve and the combustion chamber is higher, and cooling water is needed to take away more heat, so that a better cooling effect is achieved. The position corresponding to the position of the combustion chamber of the cylinder is provided with the flow guide rib or the flow guide groove, so that the contact part of the cylinder sleeve and the combustion chamber can be effectively cooled, and the reliability of the piston ring is ensured.

According to the utility model discloses an embodiment, the contained angle of helix tangent line and the axis of engine cylinder jacket of water conservancy diversion muscle 2 or guiding gutter 3 is between 80 to 87.

By arranging the flow guide ribs 2 or the flow guide grooves 3 closely on the outer peripheral surface of the cylinder liner 1, the flow guide effect on the cooling liquid can be improved, so that the generation of bubbles can be more effectively reduced and the upper part of the cylinder liner can be more sufficiently cooled.

Another embodiment of the present invention provides an engine, including the engine cylinder liner in any of the above embodiments.

Another embodiment of the present invention provides a vehicle including the above engine.

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

1. The utility model provides an engine cylinder sleeve, its characterized in that, engine cylinder sleeve includes the outer wall with the contact of engine organism water jacket, the outer peripheral face of outer wall is provided with the edge engine cylinder sleeve's axial direction is the water conservancy diversion portion of heliciform extension, the helix tangent line of water conservancy diversion portion with the contained angle of engine cylinder sleeve's axis is between 80 to 87.

2. The engine cylinder liner according to claim 1, characterized in that the flow guide is a flow guide rib protruding outward in a radial direction from an outer circumferential surface of the engine cylinder liner.

3. The engine cylinder liner according to claim 1, characterized in that the flow guide is a flow guide groove recessed inward in a radial direction from an outer circumferential surface of the engine cylinder liner.

4. The engine cylinder liner according to claim 1, characterized in that the flow guide is located at an upper portion of the engine cylinder liner such that a termination point of the flow guide extending upward in an axial direction of the engine cylinder liner is close to an upper opening of the engine cylinder liner.

5. The engine cylinder liner according to claim 1, characterized in that the location of the flow guide is set to correspond to the location of a cylinder combustion chamber.

6. An engine characterized by comprising the engine cylinder liner according to any one of claims 1 to 5.

7. A vehicle characterized by comprising the engine of claim 6.