CN102425519A - High-pressure fuel oil connecting pipe - Google Patents
High-pressure fuel oil connecting pipe Download PDFInfo
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- CN102425519A CN102425519A CN2011104600970A CN201110460097A CN102425519A CN 102425519 A CN102425519 A CN 102425519A CN 2011104600970 A CN2011104600970 A CN 2011104600970A CN 201110460097 A CN201110460097 A CN 201110460097A CN 102425519 A CN102425519 A CN 102425519A
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- pressure fuel
- hardness
- high pressure
- connecting tube
- oil
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Abstract
The invention discloses a high-pressure fuel oil connecting pipe, wherein a jointed seal structure of a sealed spherical surface and a sealed conical surface is adopted at an oil outlet end, and the oil outlet end is of a step-type structure; a certain number of annular grooves are formed near the outer circle of the oil outlet end; the middle of the oil inlet end is provided with an annular compaction conical surface; a connecting end of the high-pressure fuel oil connecting pipe is provided with a special groove for dismounting and adopts a hardness step-by-step design; the sealed spherical surface is SR3.5 and the sealed conical surface is 45 degrees; the step-type structure is divided into three sections, wherein the diameters of outer circles of all the three sections are respectively 9mm, 10.3mm and 15.3mm; the depth of each annular groove is more than 1mm; the annular compaction conical surface is 120 degrees; the hardness step-by-step design specifically indicates that: hardness of left side of the face A of a part is 18-22HRC, hardness of right side of the surface A of the part is 34-38HRC, and a 5mm-10mm transition region is allowed to be formed at the left side of the face A of the part. The high-pressure fuel oil connecting pipe is capable of realizing reliable seal of high-pressure fuel oil, can be suitable for adjustment of extrusion height of an oil injector within a certain range and is beneficial to assembly and disassembly due to the structure.
Description
Technical field
The invention belongs to the dynamic power machine technical field, be specifically related to a kind of high pressure fuel connecting tube.
Background technique
For the motor that adopts oil sprayer side direction oil-feed structure, need design high pressure fuel connecting tube.Its technological difficulties are: guarantee the reliable sealing of high pressure fuel connecting tube and oil sprayer interface, and can realize that the oil sprayer projecting height is adjustable.
Engine fuel injector is if adopt side direction oil-feed structure, and high pressure fuel connecting tube and oil sprayer generally adopt far-end to compress sealing, and its center, interface position contact ratio is difficult to guarantee, and the stressed uniformity of seal band is influenced easily, is prone to take place high pressure fuel and leaks; Because the restriction of the spatial structure of side direction oil-feed, oil sprayer projecting height are difficult to regulate, and are unfavorable for the Performance Match of motor, have especially limited the optimization Test of motor initial stage development process.Therefore, need a kind of high pressure fuel connecting tube of design, make the oil-feed sealing reliable, can adapt to the oil sprayer projecting height simultaneously and regulate within the specific limits.
Summary of the invention
The present invention is just in order to solve the deficiency of existing technology, and proposes a kind of high pressure fuel connecting tube, and to guarantee the reliable sealing of high pressure fuel connecting tube and oil sprayer interface, the while can adapt to the oil sprayer projecting height and regulate within the specific limits.
Technological scheme of the present invention: a kind of high pressure fuel connecting tube; Oil outlet end adopts the associating sealing configuration of sealing sphere 1 and sealing cone 2, and oil outlet end is stepped construction 3, near the annular groove 4 that has some on the oil outlet end cylindrical; The middle part is provided with annular and compresses the conical surface 5; Its connecting end is provided with dismounting dedicated slot 6, and part adopts the hardness segment design, and part A left side of face has the transition zone 7 of 5mm～10mm.
Said sealing sphere 1 is 45 °
for SR3.5, said sealing cone 2.
Said stepped construction 3 is divided into three sections, and the outside diameter of each section is respectively 9mm, 10.3mm, 15.3mm.
Said annular groove 4 degree of depth are greater than 1mm.
The cone angle that said annular compresses the conical surface 5 is 120 °
.
Part adopts the hardness segment design, part A left side of face hardness 18～22HRC, and part A right side of face hardness 34～38HRC, part A left side of face has the transition zone 7 of 5mm～10mm.
The present invention compares with existing technology has following beneficial effect: can realize high pressure fuel (180MPa) reliable sealing, can adapt to the oil sprayer projecting height certain limit (± 0.6mm) regulate, and structure helps dismounting.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Most preferred embodiment of the present invention is as shown in Figure 1: a kind of high pressure fuel connecting tube; Oil outlet end adopts the associating sealing configuration of sealing sphere 1 and sealing cone 2, and oil outlet end is stepped construction 3, near the annular groove 4 that has some on the oil outlet end cylindrical; The middle part is provided with annular and compresses the conical surface 5; Its connecting end is provided with dismounting dedicated slot 6, and part adopts the hardness segment design, and part A left side of face has the transition zone 7 of 5mm～10mm.Said sealing sphere 1 is 45 °
for SR3.5, said sealing cone 2.Said stepped construction 3 is divided into three sections, and the outside diameter of each section is respectively 9mm, 10.3mm, 15.3mm.Said annular groove 4 quantity are three, degree of depth 1.3mm.It is 120 °
that said annular compresses the conical surface 5.Part A left side of face hardness 20HRC, part A right side of face hardness 36HRC, part A left side of face has the transition zone 7 of 8mm.
(1) high pressure fuel connecting tube oil outlet end adopts the associating sealing configuration of sphere+conical surface, is to a certain degree eliminating high pressure fuel connecting tube and the influence that center, oil sprayer interface position does not overlap, and is beneficial to and forms uniform seal band when compressing with oil sprayer.
(2) high pressure fuel connecting tube design hierarchic structure guarantees to have certain structure intensity when overall structure compresses; And on cylindrical, have the annular groove of some, the variation of high pressure fuel connecting tube flexural rigidity can be cooperated compress deformation process, thereby adapt to the adjusting of oil sprayer projecting height.
(3) high pressure fuel connecting tube seal face adopts circular cone, makes that compaction process is stressed to be evenly distributed, and is beneficial to sealing surface centering centering.
(4) the high pressure fuel connecting tube adopts the hardness segment design, and assurance compresses, the wear-resisting property of installation process, is beneficial to the sealing surface compact distortion simultaneously, strengthens sealing effect.
(5) be provided with the dismounting dedicated slot at the high-pressure oil pipe connecting end, fixing high pressure fuel connecting tube in the disassembly process prevents that the high pressure fuel connecting tube from rotating and the wearing and tearing sealing surface.
Claims (6)
1. a high pressure fuel connecting tube is characterized in that, oil outlet end adopts the associating sealing configuration of sealing sphere (1) and sealing cone (2); And oil outlet end is stepped construction (3); Near the annular groove (4) that has some on the oil outlet end cylindrical, the middle part is provided with annular and compresses the conical surface (5), and its connecting end is provided with dismounting dedicated slot (6); Part adopts the hardness segment design, and part A left side of face has the transition zone (7) of 5mm～10mm.
2. high pressure fuel connecting tube according to claim 1; It is characterized in that said sealing sphere (1) is that SR3.5, said sealing cone (2) are 45 °
.
3. high pressure fuel connecting tube according to claim 1 is characterized in that said stepped construction (3) is divided into three sections, and the outside diameter of each section is respectively 9mm, 10.3mm, 15.3mm.
4. high pressure fuel connecting tube according to claim 1 is characterized in that said annular groove (4) degree of depth is greater than 1mm.
5. high pressure fuel connecting tube according to claim 1; It is characterized in that it is 120 °
that said annular compresses the conical surface (5).
6. high pressure fuel connecting tube according to claim 1 is characterized in that, part adopts the hardness segment design, part A left side of face hardness 18～22HRC, and part A right side of face hardness 34～38HRC, part A left side of face has the transition zone (7) of 5mm～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104600970A CN102425519A (en) | 2011-12-31 | 2011-12-31 | High-pressure fuel oil connecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104600970A CN102425519A (en) | 2011-12-31 | 2011-12-31 | High-pressure fuel oil connecting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102425519A true CN102425519A (en) | 2012-04-25 |
Family
ID=45959540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104600970A Pending CN102425519A (en) | 2011-12-31 | 2011-12-31 | High-pressure fuel oil connecting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102425519A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746923A (en) * | 2020-07-29 | 2021-05-04 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Split type side oil inlet oil sprayer oil inlet device and side oil inlet oil sprayer oil inlet system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679828A (en) * | 1981-02-11 | 1987-07-14 | Permaswage S.A. | Connecting device for pipings, pipes and conduits |
| US5365907A (en) * | 1992-11-21 | 1994-11-22 | Mercedes-Benz Ag | Cylinder head for an internal combustion engine with fuel injection |
| CN1460793A (en) * | 2002-05-20 | 2003-12-10 | 臼井国际产业株式会社 | High pressure fuel spraying pipe with connection head |
| CN2620102Y (en) * | 2003-05-25 | 2004-06-09 | 徐国华 | High-pressure fuel oil pipe assembly for diesel engine |
| JP2007332955A (en) * | 2006-03-14 | 2007-12-27 | Usui Kokusai Sangyo Kaisha Ltd | High-pressure fuel injection tube having connecting head portion and bend portion, and method for producing the same |
| CN201193579Y (en) * | 2008-05-06 | 2009-02-11 | 潍柴动力股份有限公司 | Connecting device between oil inlet pipe and cylinder head of diesel engine |
| CN201292890Y (en) * | 2008-11-11 | 2009-08-19 | 无锡开普机械有限公司 | Internal combustion engine cylinder cap structure |
-
2011
- 2011-12-31 CN CN2011104600970A patent/CN102425519A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679828A (en) * | 1981-02-11 | 1987-07-14 | Permaswage S.A. | Connecting device for pipings, pipes and conduits |
| US5365907A (en) * | 1992-11-21 | 1994-11-22 | Mercedes-Benz Ag | Cylinder head for an internal combustion engine with fuel injection |
| CN1460793A (en) * | 2002-05-20 | 2003-12-10 | 臼井国际产业株式会社 | High pressure fuel spraying pipe with connection head |
| CN2620102Y (en) * | 2003-05-25 | 2004-06-09 | 徐国华 | High-pressure fuel oil pipe assembly for diesel engine |
| JP2007332955A (en) * | 2006-03-14 | 2007-12-27 | Usui Kokusai Sangyo Kaisha Ltd | High-pressure fuel injection tube having connecting head portion and bend portion, and method for producing the same |
| CN201193579Y (en) * | 2008-05-06 | 2009-02-11 | 潍柴动力股份有限公司 | Connecting device between oil inlet pipe and cylinder head of diesel engine |
| CN201292890Y (en) * | 2008-11-11 | 2009-08-19 | 无锡开普机械有限公司 | Internal combustion engine cylinder cap structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746923A (en) * | 2020-07-29 | 2021-05-04 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Split type side oil inlet oil sprayer oil inlet device and side oil inlet oil sprayer oil inlet system |
| CN112746923B (en) * | 2020-07-29 | 2022-10-04 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Split type side oil inlet oil sprayer oil inlet device and side oil inlet oil sprayer oil inlet system |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120425 |