Copper bush sealing structure for fuel injector and fuel injector sealing method
A sealing structure and fuel injector technology, which is applied to the sealing device of the engine, machine/engine, engine components, etc., can solve the problems of high temperature boiling, piston ring wear, and piston ring locking of the diesel engine, and reduce the formation of diesel carbon deposits. , The effect of reducing processing requirements and reducing the amount of interference
Inactive Publication Date: 2016-03-30
ANHUI QUANCHAI ENGINE
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Problems solved by technology
In the end, the cooling water seeps into the cylinder continuously, and the high-temperature and high-pressure gas enters the cooling water, resulting in serious failures such as high-temperature boiling of the diesel engine, power drop, cylinder liner strain, piston ring wear, and piston ring lockup.
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] Such as Figure 1-3 As shown, this embodiment discloses a fuel injector copper sleeve sealing structure, including a cylinder head 1 and a fuel injector copper sleeve. The fuel injector copper sleeve includes a copper sleeve body, and the copper sleeve body includes an outer diameter from top to bottom. The first cylindrical casing 2 , the second cylindrical casing 3 , and the third cylindrical casing 4 are successively smaller.
[0024] A limit step 11 and a counterbore step 12 are arranged on the inner wall of the cylinder head 1 , and the limit step 11 is located above the counterbore step 12 .
[0025] The upper end of the first cylindrical sleeve body 2 is provided with an external thread, the screw sleeve 5 is screwed on the first cylindrical sleeve body 2, and the lower end of the third cylindrical sleeve body 4 forms an inner side that slopes downward...
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The invention discloses a copper bush sealing structure for a fuel injector. The copper bush sealing structure comprises a cylinder cover and a fuel injector copper bush. The fuel injector copper bush is characterized in that an outer thread is formed at the upper end of a first cylindrical bush body, a threaded bush is screwed to the first cylindrical bush body in a sleeving manner, and a flareout is formed in the lower end of a third cylindrical bush body, wherein the inner side of the flareout inclines downwards from inside to outside and the outer side of the flareout protrudes outwards; the outer side of the flareout is attached to the inner wall of the cylinder cover; a circle of barbs corresponding to a countersink step are formed on the upper edge of the outer side of the flareout and the countersink step is filled with the barbs; a step structure is formed on the connection position of the first cylindrical bush body and the third cylindrical bush body; and the step structure is attached to a limiting step. The invention further discloses a method for sealing the fuel injector through the cooper bush sealing structure. The copper bush sealing structure has the beneficial effects of being good in sealing effect and capable of effectively preventing the situations that a diesel engine comes to a boil at the high temperature, the power is lowered, a cylinder liner is drawn and damaged and a piston ring is worn and locked, lowering the cost and improving the heat dissipation effect of the copper bush.
Description
technical field [0001] The invention relates to the technical field of copper sleeves, in particular to a sealing structure of a copper sleeve of a fuel injector and a method for sealing the fuel injector. Background technique [0002] Among the existing diesel engines, some models are limited by the structure. In order to ensure the sealing requirements between the fuel injector and the cylinder head, a copper sleeve for the fuel injector is designed to separate the fuel injector from the cooling water in the cylinder head and seal it. effect. The seal between the copper sleeve of the injector and the cylinder head is divided into upper and lower parts. The upper part is sealed by a rubber sealing ring, which can meet the sealing requirements because of the low temperature; the lower part cannot be sealed by the rubber sealing ring because of the high temperature. It is completed by the interference fit of the sealing cylinder and the application of glue at the sealing pla...
Claims
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IPC IPC(8): F02F11/00
CPCF02F11/00
Inventor 陶竹林樊士贡
Owner ANHUI QUANCHAI ENGINE