CN211598891U

CN211598891U - Fuel injector bush and engine with same

Info

Publication number: CN211598891U
Application number: CN201922278890.3U
Authority: CN
Inventors: 张德联; 薛振涛; 付永刚; 宋超
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-29
Anticipated expiration: 2029-12-16

Abstract

The utility model belongs to the technical field of the engine spare part, concretely relates to sprayer bush and have its engine. The utility model provides a sprayer bush includes first bush portion and second bush portion, and second bush portion is located the tip of first bush portion and communicates mutually with first bush portion, and the one end that second bush portion links to each other with first bush portion is equipped with first boss and second boss, is equipped with first ring channel between first boss and the second boss, and wherein, the external diameter of first bush portion is less than the external diameter of second bush portion, and the height that highly is greater than the second boss of first boss. Through using the sprayer bush among this technical scheme, the height of first boss is greater than the height of second boss, can be so that the plane of first boss and the plane of second boss do not coincide for cooling water contacts with the sealing member that is located first ring channel, and then reduces the temperature of first ring channel inner seal spare, prevents that the sealing member from being heated to warp, thereby prevents that the condition of leaking from taking place.

Description

Fuel injector bush and engine with same

Technical Field

The utility model belongs to the technical field of the engine spare part, concretely relates to sprayer and have its engine.

Background

The oil sprayer bush and the cylinder cover form a water cavity to cool the oil sprayer, water sealing operation is needed between the outside of the bush and the cylinder cover, and gas sealing operation is needed between the inside of the bush and the oil sprayer. The maintenance difficulty appears damaging when current sprayer bush, hardly takes out, seals water simultaneously and adopts the conical surface sealed with the gas seal structure, and the processing technology nature of sprayer bush is poor, and O type circle is sealed to be heated in addition and is aged the problem that easily appears revealing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the sprayer bush is revealed easily at least. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides a sprayer bush, include:

a first bushing portion;

the second bushing part is positioned at the end part of the first bushing part and is communicated with the first bushing part, a first boss and a second boss are arranged at one end, connected with the first bushing part, of the second bushing part, a first annular groove is formed between the first boss and the second boss, the outer diameter of the first bushing part is smaller than that of the second bushing part, and the height of the first boss is larger than that of the second boss.

Through using the sprayer bush among this technical scheme, the height of first boss is greater than the height of second boss, can be so that the plane of first boss and the plane of second boss do not coincide for cooling water contacts with the sealing member that is located first ring channel, and then reduces the temperature of first ring channel inner seal spare, prevents that the sealing member from being heated to warp, thereby prevents that the condition of leaking from taking place.

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

in some embodiments of the invention, an inner surface of the first annular groove is coated with a heat insulating and heat resistant material.

In some embodiments of the present invention, the outer peripheral surface of the first bushing portion is further provided with a sealing tape.

In some embodiments of the present invention, the sealing tape is provided in a plurality and at intervals.

In some embodiments of the present invention, the fuel injector liner further comprises a first seal member matingly disposed within the first annular groove.

In some embodiments of the present invention, the fuel injector liner further comprises a second sealing element, the outer peripheral surface of the second liner portion is provided with a second annular groove, and the second sealing element is fittingly disposed in the second annular groove.

In some embodiments of the present invention, the first and second sealing members are both O-rings.

In some embodiments of the invention, the fuel injector liner further comprises a seal gasket located inside the second liner portion proximate to one end of the first liner portion.

The utility model also provides an engine, include:

a cylinder head;

the fuel injector bushing is arranged in the cylinder cover, a water cooling cavity is formed between the fuel injector bushing and the cylinder cover, and the fuel injector bushing is the fuel injector bushing.

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 cross-sectional view of the overall structure of a fuel injector liner according to an embodiment of the present invention.

10: first bushing portion, 11: sealing tape;

20: second bushing portion, 21: first boss, 22: second boss, 23: first annular groove, 24: a second annular groove.

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 cross-sectional view of the overall structure of a fuel injector liner according to an embodiment of the present invention. As shown in FIG. 1, the utility model provides a sprayer bush and have its engine. The utility model provides a sprayer bush includes first bush portion 10 and second bush portion 20, second bush portion 20 is located the tip of first bush portion 10 and is linked together with first bush portion 10, the one end that second bush portion 20 and first bush portion 10 link to each other is equipped with first boss 21 and second boss 22, be equipped with first ring channel 23 between first boss 21 and the second boss 22, wherein, the external diameter of first bush portion 10 is less than the external diameter of second bush portion 20, the height that highly is greater than second boss 22 of first boss 21.

Through using the sprayer bush among this technical scheme, the height of first boss 21 is greater than the height of second boss 22, can make the plane of first boss 21 and the plane of second boss 22 not coincide for the cooling water contacts with the sealing member that is located first ring channel 23, and then reduces the temperature of sealing member in first ring channel 23, prevents that the sealing member from being heated and warp, thereby prevents that the condition of leaking from taking place.

Further, in the present embodiment, the inner surface of the first annular groove 23 is coated with a heat insulating and heat resistant material, such as boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide, silicon phosphide, or the like, which absorbs heat and prevents the heat from being transferred to the seal member located in the first annular groove 23.

Specifically, in this embodiment, the outer peripheral surface of the first bushing portion 10 is further provided with a sealing strip 11, and the sealing strip 11 and the cylinder head adopt transition fit, so that gas can be prevented from entering the sealing part, the sealing part is damaged, and meanwhile, the transition fit also facilitates the detachment of the bushing, and the efficiency is improved.

Specifically, in this embodiment, the number of the sealing bands 11 is plural and the sealing bands 11 are arranged at intervals, and the number of the sealing bands 11 in this embodiment is plural and the interval arrangement is adopted, so that the air sealing effect can be improved, and the sealing performance is improved.

Further, in the present embodiment, the injector liner further includes a first seal member matingly disposed within the first annular groove 23. The first seal in this embodiment is an O-ring. An O-ring may be fitted in the first annular groove 23 to prevent water leakage from the lower end of the second liner portion 20, thereby improving the life of the fuel injector liner.

Specifically, in the present embodiment, the injector liner further includes a second seal member, the outer peripheral surface of the second liner portion is provided with a second annular groove 24, and the second seal member is fittingly provided in the second annular groove 24. The second seal in this embodiment is an O-ring. An O-ring may be fitted in the second annular groove 24 to prevent water leakage from the upper end of the second liner portion 20, thereby improving the life of the fuel injector liner.

Further, in the present embodiment, the injector liner further includes a seal gasket located at an end of the inside of the second liner portion 20 near the first liner portion 10. The height of the sealing gasket in the embodiment is adjustable, so that the extending height of the oil sprayer can be conveniently adjusted.

The utility model also provides an engine, include:

a cylinder head;

the fuel injector bushing is arranged in the cylinder cover, and a water cooling cavity is formed between the fuel injector bushing and the cylinder cover, wherein the fuel injector bushing is the fuel injector bushing.

Through using the engine among this technical scheme, the height that highly is greater than the second boss of the first boss of sprayer bush on the engine can make the plane of first boss and the plane of second boss not coincide for the cooling water contacts with the sealing member that is located first ring channel, and then reduces the temperature of sealing member in the first ring channel, prevents that the sealing member from being heated and warp, thereby prevents that the condition of leaking from taking place.

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. A fuel injector liner, comprising:

a first bushing portion;

2. The fuel injector liner according to claim 1, wherein an inner surface of the first annular groove is coated with a heat insulating and heat resistant material.

3. The fuel injector liner bushing according to claim 1, wherein the outer peripheral surface of the first liner portion is further provided with a sealing band.

4. The fuel injector liner according to claim 3, wherein said sealing band is plural in number and spaced apart.

5. The fuel injector liner according to claim 1, further comprising a first seal matingly disposed within the first annular groove.

6. The fuel injector liner bushing of claim 5 further comprising a second seal member, said second liner portion having an outer peripheral surface defining a second annular groove, said second seal member being matingly disposed within said second annular groove.

7. The fuel injector liner according to claim 6, wherein the first and second seals are both O-rings.

8. The fuel injector liner according to claim 1, further comprising a seal gasket located at an end of the interior of the second liner portion proximate the first liner portion.

9. An engine, comprising:

a cylinder head;

a fuel injector liner disposed within the cylinder head, a water-cooled cavity being formed between the fuel injector liner and the cylinder head, wherein the fuel injector liner is according to any one of claims 1-8.