CN-224228771-U - Fuel injector sealing structure

Abstract

The utility model relates to the technical field of fuel injectors, and particularly discloses a fuel injector sealing structure which comprises a tube seat, wherein a first annular groove is formed in the outer side of the tube seat, a first sealing part is arranged in the first annular groove, the end part of the first annular groove can block heat flow in a combustion chamber so as to protect the first sealing part and prolong the service life of the first sealing part, and a second sealing part arranged between a spray tube and a seat hole can seal the spray tube and the seat hole so as to prevent gaps generated by thermal deformation and improve the sealing performance and the service life of the fuel injector.

Inventors

• MA NING
• LI WENSHU
• YANG GUOQING
• Lu Lidi

Assignees

• 广西弘力科技有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (10)

1. 1. The utility model provides a sprayer seal structure, includes the tube socket, the seat hole has been seted up to the one end of tube socket, be equipped with spray tube, its characterized in that in the seat hole: The outer side of the tube seat is provided with a first annular groove, a first sealing part is arranged in the first annular groove, and a second sealing part is arranged between the seat hole and the spray tube.
2. 2. The fuel injector sealing structure according to claim 1, wherein one end of the stem is provided with a tapered surface.
3. 3. The fuel injector sealing structure according to claim 2, wherein a second annular groove is provided in an inner wall of the seat hole, the second sealing portion is provided in the second annular groove, and both ends of the second annular groove can press both ends of the second sealing portion to deform the second sealing portion.
4. 4. The fuel injector sealing structure according to claim 3, wherein the tube seat comprises a seat body and a seat ring, a clamping groove is formed in one end of the seat ring, the clamping groove is detachably connected with one end of the seat body, the second annular groove is formed in the bottom of the clamping groove, and one end of the second sealing portion is abutted to an end face of one end of the seat body.
5. 5. The fuel injector sealing structure according to claim 4, wherein the second sealing portion is a rubber seal ring, and a cross section of the second sealing portion is circular.
6. 6. The fuel injector sealing structure according to claim 3, wherein one end of the second ring groove extends outward from one end of the stem to form a socket portion, and the other end of the second ring groove is provided with a first pushing surface.
7. 7. The fuel injector sealing structure according to claim 6, wherein an annular second pushing surface is provided on the outer side of the nozzle, and two ends of the second sealing portion are respectively abutted against the first pushing surface and the second pushing surface and can be deformed.
8. 8. The fuel injector sealing structure according to claim 7, wherein the second sealing portion is a rubber seal ring, and the cross section of the second sealing portion is rectangular.
9. 9. The fuel injector seal arrangement of claim 8 wherein said first push surface and said second push surface are beveled and have the same direction of inclination.
10. 10. The fuel injector sealing structure according to claim 1, wherein the first sealing portion is a rubber seal ring, and a cross section of the first sealing portion is circular.

Description

Fuel injector sealing structure Technical Field The utility model belongs to the technical field of fuel injectors, and particularly relates to a fuel injector sealing structure. Background The fuel injector is a common fuel injection component that is installed by fitting a stem into a fitting hole of a cap body. The traditional tube seat and the mounting hole are mutually assembled and need to be sealed through the sealing element, but in the mounting hole, the end part of the sealing element is easy to be heated and aged due to the fact that the sealing element is easy to be impacted by high hot air flow in the combustion chamber, and the sealing property between the tube sleeve and the seat hole is easy to be heated and invalid due to the fact that the thermal deformation of the tube sleeve and the tube seat are different, the sealing property between the tube seat and the mounting hole and the tube sleeve and the seat hole can be reduced after long-term use, and the service life and the cost of the fuel injector are affected. The patent literature with the application number of CN201620963939.2 discloses a ball-type sealing valve spray hole inclined type oil sprayer, which comprises an oil sprayer body, an electric socket, an oil inlet component, a valve body component and an oil spraying component, wherein the oil spraying component comprises an oil spraying sealing ring, a protective sleeve, an oil spraying sheet and an oil spraying seat, the oil spraying sheet is arranged in a groove of the oil spraying seat, a sinking groove is formed at the joint of the oil spraying seat and the edge of the oil spraying sheet, a plurality of spray holes are formed on the oil spraying sheet and are arranged around the center of the oil spraying sheet, and a certain angle is formed between the plurality of spray holes and the axial direction of the oil spraying sheet in an inclined mode. It can be seen from the drawings of the specification of the reference document that the oil injection sealing ring is clamped in the annular groove to seal the outside of the pipe seat, and the arrangement of the annular groove can also block part of heat impact, but a sealing structure is lacking between the spray pipe and the seat hole, so that the sealing property is easily reduced after the spray pipe and the seat hole are deformed by heating, and the aerosol is permeated, thereby influencing the performance of an electromagnetic coil in the oil injector. The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used as an aid in the evaluation of the novelty and creativity of the present utility model in the event that no clear evidence indicates that such is already disclosed at the date of filing of the present application. Disclosure of utility model The utility model aims to provide a sealing structure of an oil sprayer, so as to solve the problems that the sealing performance between a tube seat and a mounting hole and the sealing performance between a sleeve and a seat hole are reduced and the service life is reduced after the conventional oil sprayer is used for a long time. In order to achieve the above purpose, the utility model provides a valve seat comprising a valve seat, wherein one end of the valve seat is provided with a valve seat hole, a spray pipe is arranged in the valve seat hole, a first annular groove is arranged on the outer side of the valve seat, a first sealing part is arranged in the first annular groove, and a second sealing part is arranged between the valve seat hole and the spray pipe. Preferably, in the above technical solution, one end of the tube seat is provided with a conical surface. Preferably, in the above technical solution, the inner wall of the seat hole is provided with a second ring groove, the second sealing portion is disposed in the second ring groove, and two ends of the second ring groove can squeeze two ends of the second sealing portion to deform the second sealing portion. Preferably, in the above technical solution, the tube seat includes a seat body and a seat ring, a clamping groove is provided at one end of the seat ring, the clamping groove is detachably connected with one end of the seat body, the second ring groove is provided at the bottom of the clamping groove, and one end of the second sealing portion is abutted to an end face of one end of the seat body. Preferably, in the above technical solution, the second sealing portion is a rubber sealing ring, and a cross section of the second sealing portion is circular. Preferably, in the above technical solution, one end of the second ring groove extends outwards from one end of the tube seat to form an insertion port portion, and the other end of the second ring groove is provided with a first pushing surface. Preferably, in the above tech