Sealing structure of oil sprayer

Abstract

The utility model relates to the technical field of oil sprayers, and particularly discloses an oil sprayer sealing structure which comprises a pipe base, a first ring groove is formed in the outer side of the pipe base, a first sealing part is installed in the first ring groove, and the end of the first ring groove can block heat flow in a combustion chamber so as to protect the first sealing part. The service life of the first sealing part can be prolonged; the second sealing part arranged between the spray pipe and the seat hole can form sealing between the spray pipe and the seat hole, so that a gap generated by thermal deformation is prevented, the sealing performance is improved, and the service life of the oil sprayer is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of fuel injector technology, and specifically relates to a fuel injector sealing structure. Background Technology

[0002] Fuel injectors are commonly used fuel injection elements, installed through mounting holes in the pipe seat and mounting cap. Traditionally, the pipe seat and mounting hole require sealing elements for assembly. However, the mounting hole is susceptible to heat aging due to the impact of high-temperature airflow within the combustion chamber. Furthermore, the difference in thermal deformation between the pipe sleeve and the pipe seat can lead to heat-induced seal failure between the sleeve and the seat. Over time, the seals between the pipe seat and the mounting hole, as well as between the sleeve and the seat, will deteriorate, affecting the injector's lifespan and cost.

[0003] Patent document CN201620963939.2 discloses a spherical sealing valve nozzle tilting injector, including an injector body, an electrical socket, an oil inlet assembly, a valve body assembly, and an injection assembly. The injection assembly includes an injection sealing ring, a protective sleeve, an injection blade, and an injection seat. The injection blade is disposed in a groove in the injection seat, and a recessed groove is formed at the junction of the injection seat and the edge of the injection blade. The injection blade has several nozzles arranged around the center of the injection blade, and the nozzles are tilted at a certain angle to the axial direction of the injection blade. From the accompanying drawings of the prior art, it can be seen that the injection sealing ring is locked in the annular groove to seal the outside of the pipe seat, and the annular groove can also block some of the heat impact. However, there is no sealing structure between the nozzle and the seat hole, which can easily cause poor sealing after heat deformation, allowing mist to penetrate and thus affecting the performance of the electromagnetic coil in the injector.

[0004] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this invention is to provide a fuel injector sealing structure, thereby overcoming the problem that the sealing performance between the fuel injector seat and the mounting hole, as well as between the sleeve and the seat hole, will decrease and the service life will be reduced after long-term use.

[0006] To achieve the above objectives, this utility model provides a tube seat, one end of which has a seat hole, a nozzle is provided in the seat hole, a first annular groove is provided on the outer side of the tube seat, a first sealing part is provided in the first annular groove, and a second sealing part is provided between the seat hole and the nozzle.

[0007] Preferably, in the above technical solution, one end of the tube seat is provided with a conical surface.

[0008] Preferably, in the above technical solution, the inner wall of the seat hole is provided with a second annular groove, the second sealing part is disposed in the second annular groove, and the two ends of the second annular groove can squeeze the two ends of the second sealing part to deform the second sealing part.

[0009] Preferably, in the above technical solution, the tube seat includes a seat body and a seat ring. One end of the seat ring is provided with a slot, which is detachably connected to one end of the seat body. The second annular groove is provided at the bottom of the slot, and one end of the second sealing part abuts against the end face of one end of the seat body.

[0010] Preferably, in the above technical solution, the second sealing part is a rubber sealing ring, and the cross-section of the second sealing part is circular.

[0011] Preferably, in the above technical solution, one end of the second annular groove extends outward from one end of the tube seat to form a socket portion, and the other end of the second annular groove is provided with a first push surface.

[0012] Preferably, in the above technical solution, the outer side of the nozzle is provided with an annular second push surface, and the two ends of the second sealing part abut against the first push surface and the second push surface respectively and can be deformed.

[0013] Preferably, in the above technical solution, the second sealing part is a rubber sealing ring, and the cross-section of the second sealing part is rectangular.

[0014] Preferably, in the above technical solution, the first pushing surface and the second pushing surface are inclined structures and have the same inclination direction.

[0015] Preferably, in the above technical solution, the first sealing part is a rubber sealing ring, and the cross-section of the first sealing part is circular.

[0016] Compared with existing technologies, this utility model has the following beneficial effects:

[0017] 1. In the injector sealing structure of this utility model, a first annular groove is provided on the outer side of the pipe seat, and a first sealing part is installed in the first annular groove. The end of the first annular groove can block the heat flow in the combustion chamber, thereby protecting the first sealing part and extending its service life. The second sealing part provided between the injector pipe and the seat hole can form a seal between the injector pipe and the seat hole, thereby preventing gaps caused by heat deformation and improving sealing performance and injector life.

[0018] 2. One end of the tube seat in this utility model is provided with a conical surface, which can play a guiding role during installation.

[0019] 3. The tube seat in this utility model has two implementation methods. One method divides the tube seat into two parts: a seat body and a seat ring. The two ends of the second sealing part are squeezed by the bottom of the second annular groove and the end face of one end of the seat body to produce radial deformation, thereby ensuring the sealing between the tube and the nozzle. The second method sets one end of the second annular groove as an outwardly extending insertion part and the other end of the second annular groove as a first push surface. The nozzle is provided with a second push surface. When the nozzle is installed in place, the first push surface and the second push surface can squeeze the two ends of the second sealing part to produce radial deformation, thereby ensuring the sealing between the nozzle and the nozzle.

[0020] 4. The inclined structure of the first and second push surfaces in this utility model can not only guide the nozzle when it is inserted into the seat hole, but also make the material at both ends of the second sealing part tightly packed into the gap between the inner wall of the second annular groove and the outer side of the nozzle when the first and second push surfaces squeeze the second sealing part. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the injector sealing structure in Example 1.

[0022] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3 This is a structural diagram of the injector in Example 1.

[0024] Figure 4 This is a cross-sectional view of the injector sealing structure in Example 2.

[0025] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0026] Explanation of key figure labels:

[0027] 100-Pipe seat, 110-Seat hole, 120-First annular groove, 130-Conical surface, 140-Second annular groove, 150-Socket portion, 160-First push surface;

[0028] 200 - Nozzle, 210 - Second thrust surface;

[0029] 300 - First sealing part;

[0030] 400 - Second sealing part;

[0031] 500-seat body;

[0032] 600 - Seat ring, 610 - Card slot. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, the injector sealing structure in this embodiment includes: a pipe seat 100, a seat hole 110, a first annular groove 120, a conical surface 130, a second annular groove 140, a nozzle 200, a first sealing part 300, a second sealing part 400, a seat body 500, a seat ring 600, and a retaining groove 610.

[0039] One end of the tube seat 100 is provided with a seat hole 110. The nozzle 200 passes through the seat hole 110 and is fixedly connected to the injector body. A first annular groove 120 is provided on the outer side of the tube seat 100. The cross-section of the first annular groove 120 is rectangular or semi-circular. A first sealing part 300 is installed in the first annular groove 120. A conical surface 130 is provided at one end of the tube seat 100. The top edge of the conical surface 130 is lower than the edge of the first annular groove 120. A second annular groove 140 is provided on the inner wall of the seat hole 110. A second sealing part 400 is installed in the second annular groove 140. The two ends of the second annular groove 140 can squeeze the two ends of the second sealing part 400 to deform the second sealing part 400, so that the side of the second sealing part 400 is in close contact with the inner wall of the second annular groove 140 and the outer wall of the nozzle 200. The first sealing part 300 is a rubber sealing ring, and the cross-section of the first sealing part 300 is circular.

[0040] More specifically, the tube seat 100 includes a seat body 500 and a seat ring 600. One end of the seat ring 600 has a groove 610, and a conical surface 130 is provided at the other end of the seat ring 600. The groove 610 is connected to one end of the seat body 500 by means of threads or snap-fit. A second annular groove 140 is formed at the bottom of the groove 610 to form a countersunk hole structure. One end of the second sealing part 400 abuts against the end face of one end of the seat body 500, and the other end of the second sealing part 400 abuts against the bottom of the second annular groove 140. The second sealing part 400 is a rubber sealing ring with a circular cross-section. When the seat ring 600 and the seat body 500 are installed in place, both ends of the second sealing part 400 can be squeezed, causing its cross-section to deform radially to form an elliptical structure.

[0041] Example 2

[0042] like Figure 4 and Figure 5 As shown, the main difference between this embodiment and the injector sealing structure in the above embodiments is that the pipe seat 100 is an integral structure; one end of the second annular groove 140 extends outward from one end of the pipe seat 100 to form a socket 150, and the other end of the second annular groove 140 is provided with a first push surface 160. A stepped shaft structure is provided on the outside of the nozzle 200 to form an annular second push surface 210. The outside of the nozzle 200 is inserted into the socket 150 so that the two ends of the second sealing part 400 abut against the first push surface 160 and the second push surface 210 respectively, and the second sealing part 400 deforms in its axial direction; the second sealing part 400 is a rubber sealing ring, and the cross-section of the second sealing part 400 is preferably a rectangular structure.

[0043] More specifically, the first push surface 160 and the second push surface 210 are inclined structures with the same inclination direction. When the nozzle 200 is inserted into the seat hole 110, the first conical surface 130 and the second conical surface 130 of the inclined structure can play a guiding role. Moreover, when the first push surface 160 and the second push surface 210 squeeze the second sealing part 400, the material at both ends of the second sealing part 400 is tightly packed into the gap between the inner wall of the second annular groove 140 and the outer side of the nozzle 200, further improving the sealing effect.

[0044] In summary, in the injector sealing structure of the above embodiments, a first annular groove 120 is provided on the outer side of the pipe seat 100, and a first sealing part 300 is installed in the first annular groove 120. The end of the first annular groove 120 can block the heat flow in the combustion chamber, thereby protecting the first sealing part 300 and extending its service life. The second sealing part 400 provided between the nozzle 200 and the seat hole 110 can form a seal between the nozzle 200 and the seat hole 110, thereby preventing gaps caused by heat deformation and improving sealing performance and injector life.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A fuel injector sealing structure, comprising a pipe seat, one end of which has a seat hole, and a fuel injector is disposed within the seat hole, characterized in that: A first annular groove is provided on the outer side of the tube seat, a first sealing part is provided in the first annular groove, and a second sealing part is provided between the seat hole and the nozzle.

2. The injector sealing structure according to claim 1, characterized in that, One end of the tube seat is provided with a conical surface.

3. The injector sealing structure according to claim 2, characterized in that, The inner wall of the seat hole is provided with a second annular groove, and the second sealing part is disposed in the second annular groove. The two ends of the second annular groove can squeeze the two ends of the second sealing part to deform the second sealing part.

4. The injector sealing structure according to claim 3, characterized in that, The tube seat includes a seat body and a seat ring. One end of the seat ring has a slot, which is detachably connected to one end of the seat body. The second annular groove is formed at the bottom of the slot, and one end of the second sealing part abuts against the end face of one end of the seat body.

5. The injector sealing structure according to claim 4, characterized in that, The second sealing part is a rubber sealing ring, and the cross-section of the second sealing part is circular.

6. The injector sealing structure according to claim 3, characterized in that, One end of the second annular groove extends outward from one end of the tube seat to form a socket portion, and the other end of the second annular groove is provided with a first push surface.

7. The injector sealing structure according to claim 6, characterized in that, The nozzle has an annular second push surface on its outer side, and the two ends of the second sealing part abut against the first push surface and the second push surface respectively and can be deformed.

8. The injector sealing structure according to claim 7, characterized in that, The second sealing part is a rubber sealing ring, and the cross-section of the second sealing part is rectangular.

9. The injector sealing structure according to claim 8, characterized in that, The first push surface and the second push surface are inclined structures and have the same inclination direction.

10. The injector sealing structure according to claim 1, characterized in that, The first sealing part is a rubber sealing ring, and the cross-section of the first sealing part is circular.

Images