CN112963279A - Cylinder penetrating sealing structure of oil injector - Google Patents
Cylinder penetrating sealing structure of oil injector Download PDFInfo
- Publication number
- CN112963279A CN112963279A CN202110297248.9A CN202110297248A CN112963279A CN 112963279 A CN112963279 A CN 112963279A CN 202110297248 A CN202110297248 A CN 202110297248A CN 112963279 A CN112963279 A CN 112963279A
- Authority
- CN
- China
- Prior art keywords
- sprayer
- joint
- head cover
- cylinder head
- high pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a through-cylinder sealing structure of an oil sprayer, and relates to the technical field of oil sprayers of engines. The structure comprises an oil injector joint, a high-pressure oil pipe nut, a high-pressure oil pipe and a cylinder head cover, wherein the oil injector joint penetrates out of the wall of the cylinder head cover and is connected with one end of the high-pressure oil pipe, the joint of the oil injector joint and the high-pressure oil pipe is arranged on the high-pressure oil pipe nut sleeve, the outer wall of the high-pressure oil pipe nut is connected with the cylinder head cover, an annular groove is formed in the outer wall of the oil injector joint, a sealing ring is arranged in the annular groove, and an inner ring unthreaded hole matched with the outer. According to the invention, the inner ring unthreaded hole and the sealing ring on the oil sprayer joint play a sealing role together, so that oil gas in the cylinder head cover is prevented from leaking outside through a thread gap between the high-pressure oil pipe nut and the oil sprayer joint. The sealing structure is simple, easy to assemble and high in sealing reliability.
Description
Technical Field
The invention relates to the technical field of fuel injectors of engines, in particular to a through cylinder sealing structure of a fuel injector.
Background
The fuel injectors of the engine are generally disposed outside or inside the cylinder head cover. For an engine with an oil injector arranged inside a cylinder head cover, under the condition that the high-pressure oil pipe is directly connected to an oil injector joint, a sealing structure that the oil injector (or the high-pressure oil pipe) penetrates through the cylinder head cover needs to be designed so as to ensure that oil gas inside the cylinder head cover cannot leak outwards.
At present, the traditional high-pressure oil pipe is directly connected to an oil injector connector, and the problem that oil gas in a cylinder head cover leaks outside through a thread gap between a high-pressure oil pipe nut and the oil injector connector exists in the arrangement structure. And if the sealant is coated on the nut thread of the high-pressure oil pipe or the joint thread of the oil sprayer to block the thread clearance of the thread pair, the coating efficiency of the sealant is low, the requirement on the process is high, and the coating consistency is difficult to control. Meanwhile, redundant residual glue falls into the cylinder head cover, and further the risk of blocking an engine oil channel exists.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cylinder penetrating sealing structure of an oil sprayer, and aims to solve the problems that a thread gap between a high-pressure oil pipe nut and an oil sprayer joint leaks outwards and the like in an oil sprayer arrangement structure of an existing engine.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a sprayer wears jar seal structure, includes sprayer joint, high pressure fuel pipe nut, high pressure fuel pipe, cylinder head cover, the sprayer connects and wears out cylinder head cover wall and is connected with high pressure fuel pipe's one end, the sprayer connects and the high pressure fuel pipe junction is located to high pressure fuel pipe nut cover, high pressure fuel pipe nut outer wall is connected with the cylinder head cover, be provided with annular groove on the sprayer connects the outer wall, be provided with the sealing washer in the annular groove, be provided with the inner circle unthreaded hole with sprayer joint outer wall looks adaptation in the high pressure fuel pipe nut, sprayer joint front end outer wall is threaded connection with high pressure fuel pipe nut.
Preferably, the sealing ring is an O-ring. Such an arrangement may facilitate assembly and sealing.
Preferably, the inner ring unthreaded hole and the sealing ring are in interference fit. The design thus made possible allows a better sealing action and a simple assembly.
The invention has the beneficial effects that:
according to the through-cylinder sealing structure of the oil injector, the inner ring unthreaded hole and the sealing ring on the oil injector joint play a sealing role together, and oil gas in the cylinder head cover is prevented from leaking outside through a thread gap between the high-pressure oil pipe nut and the oil injector joint. The sealing structure is simple, easy to assemble and high in sealing reliability.
Drawings
Fig. 1 is a schematic structural view of a through-cylinder sealing structure of a fuel injector according to embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional view of a joint of an injector in a through-cylinder sealing structure of the injector according to embodiment 1 of the present invention;
fig. 3 is a schematic view of a high-pressure oil pipe nut in a through-cylinder sealing structure of an oil injector according to embodiment 1 of the present invention;
in the figure, 1-a cylinder head cover inner cavity, 2-a cylinder head cover, 3-an oil injector joint, 4-a high-pressure oil pipe nut, 5-a high-pressure oil pipe, 6-a sealing ring, 7-an annular groove and 8-an inner ring unthreaded hole.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Example 1
As shown in fig. 1 to 3, the invention provides a through-cylinder sealing structure of an oil injector, which comprises an oil injector joint 3, a high-pressure oil pipe nut 4, a high-pressure oil pipe 5 and a cylinder head cover 2, wherein the oil injector joint 3 penetrates through the wall of the cylinder head cover 2 and is connected with one end of the high-pressure oil pipe 5, the high-pressure oil pipe nut 4 is sleeved at the joint of the oil injector joint 3 and the high-pressure oil pipe 5, the outer wall of the high-pressure oil pipe nut 4 is connected with the cylinder head cover 2, an annular groove 7 is arranged on the outer wall of the oil injector joint 3, a sealing ring 6 is arranged in the annular groove 7, an inner ring unthreaded hole 8 matched with the outer wall of the oil injector joint 3 is arranged in the high-pressure oil pipe nut.
This structure is when installing the use, the sprayer is installed in cylinder head cover 2, sprayer joint 3 wears out cylinder head cover 2 wall, high pressure fuel pipe nut 4 is screwed through inside and sprayer joint 3 front end, until 3 tip of sprayer joint and the high pressure fuel pipe nut 4 in advance the one end of the high pressure fuel pipe 5 of suit press tightly mutually and be connected, at this moment, sealing washer 6 in the annular groove 7 of sprayer joint 3 is hugged closely with the inner wall of the inner circle unthreaded hole 8 of high pressure fuel pipe nut 4 mutually, thereby prevent that the vaporific oil gas of cylinder head cover inner chamber 1 from seeing through the thread gap between high pressure fuel pipe nut 4 and the sprayer joint 3 and leaking outward. It is simple to see this seal structure, and the assembly is easy, dismantles easy maintenance, and sealing reliability is high.
Example 2
The other parts of this embodiment are the same as those of embodiment 1, except that the seal ring 6 is an O-ring. Such an arrangement may facilitate assembly and sealing.
Example 3
The other parts of this embodiment are the same as those of embodiment 1, except that the inner ring unthreaded hole 8 and the seal ring 6 are in interference fit. The design that can like this makes the sealed effect of structure better, and the assembly is simple and convenient.
Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. The utility model provides a sprayer wears jar seal structure, includes sprayer joint, high pressure fuel pipe nut, high pressure fuel pipe, cylinder head cover, the sprayer connects and wears out the cylinder head cover wall and is connected with high pressure fuel pipe's one end, the sprayer connects and the high pressure fuel pipe junction is located to high pressure fuel pipe nut cover, high pressure fuel pipe nut outer wall is connected with the cylinder head cover, a serial communication port, be provided with the annular groove on the sprayer connects the outer wall, be provided with the sealing washer in the annular groove, be provided with the inner circle unthreaded hole with sprayer joint outer wall looks adaptation in the high pressure fuel pipe nut, sprayer joint front end outer wall is threaded connection with high pressure fuel pipe nut.
2. The fuel injector through-cylinder sealing structure according to claim 1, characterized in that the sealing ring is an O-ring.
3. The fuel injector through-cylinder sealing structure according to claim 1, characterized in that the inner ring unthreaded hole and the sealing ring are in interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297248.9A CN112963279A (en) | 2021-03-19 | 2021-03-19 | Cylinder penetrating sealing structure of oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297248.9A CN112963279A (en) | 2021-03-19 | 2021-03-19 | Cylinder penetrating sealing structure of oil injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112963279A true CN112963279A (en) | 2021-06-15 |
Family
ID=76279480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110297248.9A Pending CN112963279A (en) | 2021-03-19 | 2021-03-19 | Cylinder penetrating sealing structure of oil injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112963279A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150327A (en) * | 2018-01-11 | 2018-06-12 | 东风商用车有限公司 | A kind of connection structure of fuel injector and high-pressure oil pipe |
-
2021
- 2021-03-19 CN CN202110297248.9A patent/CN112963279A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150327A (en) * | 2018-01-11 | 2018-06-12 | 东风商用车有限公司 | A kind of connection structure of fuel injector and high-pressure oil pipe |
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