CN111520266A - Lightweight high-pressure oil rail - Google Patents
Lightweight high-pressure oil rail Download PDFInfo
- Publication number
- CN111520266A CN111520266A CN202010188065.9A CN202010188065A CN111520266A CN 111520266 A CN111520266 A CN 111520266A CN 202010188065 A CN202010188065 A CN 202010188065A CN 111520266 A CN111520266 A CN 111520266A
- Authority
- CN
- China
- Prior art keywords
- rail
- pipe
- joint
- oil
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000003466 welding Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 54
- 239000000295 fuel oil Substances 0.000 description 8
- 230000003749 cleanliness Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M55/025—Common rails
-
- 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
Landscapes
- 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 light-weight high-pressure oil rail, which comprises a rail pipe (2) with a hollow cavity, wherein an oil inlet and an oil outlet are arranged on the rail pipe (2), and the light-weight high-pressure oil rail is characterized in that: a boss is integrally manufactured on a rail pipe (2) at an oil inlet and an oil outlet to form a short sealing joint (9), a conical hole which is attached to a conical surface at the head of a high-pressure oil pipe (6) to form a high-pressure sealing belt (10) is manufactured at an inner hole orifice of the short sealing joint (9), an auxiliary supporting joint (3) is sleeved on the short sealing joint (9), the auxiliary supporting joint (3) is fixed on the rail pipe (2), an outer threaded section which is in threaded connection with a connecting threaded sleeve (7) is manufactured on the outer circle of the auxiliary supporting joint (3), and a bushing (8) sleeved with the rod part of the high-pressure oil pipe (6) is placed in the inner hole of the auxiliary supporting joint (3), so that the rail pipe (2) can be processed by using a bar stock and is short and convenient for; the bushing (8) forms a support, which ensures reliable sealing and reduces vibration.
Description
Technical Field
The invention relates to a light-weight high-pressure oil rail in the technical field of engines, in particular to a high-pressure oil rail with an auxiliary support joint.
Background
With the rapid development of social economy and the stricter national emission standards, the high-pressure common rail technology plays an increasingly important role in engines, and high-pressure fuel (the pressure exceeds 1000bar) pumped by a high-pressure oil pump in a diesel engine is conveyed to a high-pressure fuel rail through a high-pressure oil pipe, and then the fuel with constant pressure stored in the high-pressure fuel rail is conveyed to an oil injector through the high-pressure oil pipe. The high-pressure oil rail is used as an important component of a high-pressure oil injection system, and has the function of balancing the injection pressure of each oil injection nozzle while realizing the function of distributing high-pressure fuel oil. Most of the conventional high-pressure oil rails are manufactured by integral forging and machining as shown in fig. 4 and 5, and have high manufacturing cost and heavy weight, internal cleanliness is not easy to guarantee, and the low cost, light weight and reliable use of an engine assembly are not facilitated.
Disclosure of Invention
The invention provides a light-weight high-pressure oil rail, aiming at solving the problems that the integral high-pressure oil rail in the prior art is high in manufacturing cost and heavy, the internal cleanliness is not easy to guarantee, and the low cost, light weight and reliable use of an engine assembly are not facilitated. The invention relates to a light-weight high-pressure oil rail, which comprises a rail pipe with a hollow cavity, wherein the rail pipe is provided with an oil inlet and an oil outlet, and the light-weight high-pressure oil rail is characterized in that: the oil inlet with the integrative boss of making of rail pipe of oil outlet department form short type sealing joint, the hole drill way of short type sealing joint make with the conical surface laminating of high-pressure oil pipe head portion after form the taper hole in high-pressure seal area, short type sealing joint on the cover auxiliary stay connect, auxiliary stay connect fix on the rail pipe, auxiliary stay connect excircle on make with be connected the external screw thread section of swivel nut threaded connection, auxiliary stay connect the hole in place the bush of suit high-pressure oil pipe pole portion.
Furthermore, the auxiliary support joint is fixed on the rail pipe through welding.
Further, the two ends of the rail pipe are in threaded connection with the rail pressure sensor and the electric control pressure release valve, and the rail pressure sensor and the electric control pressure release valve are in high-pressure sealing with the rail pipe through end faces.
Furthermore, an oil return pipe joint for electric control pressure relief is arranged on the rail pipe, and the oil return pipe joint is in sealing connection with the rail pipe through threads.
The light-weight high-pressure oil rail has the advantages that the rail pipe at the oil inlet and the oil outlet is integrally provided with the boss to form the short-type sealing joint, so that the rail pipe does not need integral forging forming and can be directly processed by adopting a round bar stock, meanwhile, because the oil passage hole in the short-type sealing joint is very short, the cleaning and washing of burrs of the through hole are convenient, the manufacturing cost is reduced, and the product cleanliness is easy to ensure; the high-pressure oil rail has strong machinability; the oil inlet and the oil outlet are respectively provided with an auxiliary support joint, the auxiliary support joints and the rail pipe are connected into a whole in a welding mode, an inner hole of each auxiliary support joint is attached to the outer circle of the bushing sleeved with the rod part of the high-pressure oil pipe, support is formed, axial force generated after the inner thread of the connecting threaded sleeve is screwed with the outer thread of each auxiliary support joint is transmitted to the end face of the bushing, the conical surface of the head part of the high-pressure oil pipe is attached to the conical surface of the short sealing joint conical hole on the rail pipe, high-pressure fuel oil is sealed and reliable, vibration of the high-pressure oil pipe is reduced by the bushing, in addition, an oil pipe clamp close to the end of the high-pressure oil.
Drawings
Fig. 1 is a schematic view of a lightweight high pressure fuel rail of the present invention.
Fig. 2 is a schematic view of a cross-section of the oil inlet and outlet of fig. 1 and a connection with an external high pressure oil pipe.
Fig. 3 is a partially enlarged view at I of fig. 2.
Fig. 4 is a schematic view of a prior art integrated high pressure fuel rail.
Fig. 5 is a schematic cross-sectional view of fig. 4.
In the figure: 1. the device comprises a rail pressure sensor, 2 rail pipes, 3 auxiliary support joints, 4 oil return pipe joints, 5 electronic control pressure relief valves, 6 high-pressure oil pipes, 7 connecting threaded sleeves, 8 bushings, 9 short sealing joints, 10 high-pressure sealing belts and 11 welding seams.
Detailed Description
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
Referring to fig. 1, 2 and 3, the light-weight high-pressure oil rail of the present invention comprises a rail pipe 2 having a hollow cavity, wherein the rail pipe 2 is provided with an oil inlet and an oil outlet, and is characterized in that: the high-pressure fuel oil feeding device is characterized in that a boss is integrally manufactured on the rail pipe 2 at the oil inlet and the oil outlet to form a short sealing joint 9, threads are not arranged on the outer edge of the short sealing joint 9, a taper hole which is attached to the conical surface of the head of the high-pressure oil pipe 6 to form a high-pressure sealing belt 10 is manufactured on the orifice of an inner hole of the short sealing joint 9, a sealing conical surface is arranged at the end of the short sealing joint 9, a high-pressure fuel oil hole which is directly communicated with the hollow cavity on the rail pipe 2 is formed in the small end of the sealing conical surface, the high-pressure fuel oil supplied by an external high-pressure oil pump enters the hollow cavity on the high-pressure oil pipe rail pipe 2 through the high-pressure fuel oil hole of the short sealing joint 9 at the oil inlet of the rail pipe 2, and the high-pressure fuel oil stored in the hollow cavity on the rail pipe. Short type sealing joint 9 on the cover be equipped with auxiliary stay connect 3, auxiliary stay connects 3 the hole and the excircle laminating of short type sealing joint 9, ensures that auxiliary stay connects 3 the hole axis coaxial with short type sealing joint 9's excircle axis, auxiliary stay connects 3 lower terminal surface and the laminating of the 2 upper platforms of rail pipe, auxiliary stay connects 3 and the 2 upper platforms of rail pipe between fixed connection, auxiliary stay connect 3 excircle on the system have with be connected the external screw thread section of swivel nut 7 threaded connection, auxiliary stay connect 3 holes in place the bush 8 of the 6 pole portions of suit high pressure fuel pipe. The conical surface of the head of the high-pressure oil pipe 6 is attached to the conical surface of the conical hole of the short sealing joint 9 on the rail pipe 2 to form a high-pressure sealing belt 10; the inner hole cylindrical surface of the auxiliary support joint 3 is attached to the outer cylindrical surface of a bushing 8 sleeved on the rod portion of the high-pressure oil pipe 6 to form a support, after the inner thread on the connecting threaded sleeve 7 is in threaded connection with the outer thread on the auxiliary support joint 3, the axial force generated by threaded tightening is transmitted to the end surface of the bushing 8 at the front portion of the high-pressure oil pipe 6, so that the conical surface of the head of the high-pressure oil pipe 6 is attached to the conical surface of the conical hole of the short seal joint 9 on the rail pipe 2 to form a high-pressure seal belt 10, high-pressure fuel oil sealing can be guaranteed, and vibration of.
Furthermore, the auxiliary support joint 3 is fixed on the rail pipe 2 by welding, the welding seam 11 can adopt an intermittent welding or full welding mode, the sealing requirement on the welding seam 11 is not required, and only the welding seam 11 is required to have proper connection strength.
Further, the two ends of the rail pipe 2 are in threaded connection with the rail pressure sensor 1 and the electronic control pressure release valve 5, and the rail pressure sensor 1 and the electronic control pressure release valve 5 are in high-pressure sealing with the rail pipe 2 through end faces.
Furthermore, an oil return pipe joint 4 for electric control pressure relief is arranged on the rail pipe 2, and the oil return pipe joint 4 is in sealing connection with the rail pipe 2 through threads.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (6)
1. The utility model provides a lightweight high pressure oil rail, is including rail pipe (2) that have the cavity, rail pipe (2) on be provided with oil inlet and oil-out, its characterized in that: the oil inlet with rail pipe (2) an organic whole of oil outlet department make the boss and form short type sealing joint (9), the hole drill way of short type sealing joint (9) make with high pressure fuel pipe (6) head conical surface laminating after form the taper hole of high pressure seal area (10), short type sealing joint (9) go up the cover and be equipped with auxiliary stay joint (3), auxiliary stay joint (3) fix on rail pipe (2), auxiliary stay joint (3) excircle on the system have with be connected swivel nut (7) threaded connection's external screw thread section, auxiliary stay joint (3) hole in put bush (8) of suit high pressure fuel pipe (6) pole portion.
2. The light weight high pressure oil rail of claim 1, wherein: the auxiliary support joint (3) is fixed on the rail pipe (2) through welding.
3. A light weight high pressure oil rail according to claim 1 or 2, characterized in that: the rail pressure sensor (1) and the electronic control pressure release valve (5) are in threaded connection with the two ends of the rail pipe (2), and the rail pressure sensor (1) and the electronic control pressure release valve (5) are in high-pressure sealing with the rail pipe (2) through end faces.
4. The light weight high pressure oil rail of claim 1, wherein: the hydraulic pressure relief valve is characterized in that an oil return pipe joint (4) with an electric control pressure relief function is arranged on the rail pipe (2), and the oil return pipe joint (4) is in sealing connection with the rail pipe (2) through threads.
5. A light weight high pressure oil rail according to claim 2, characterized in that: the hydraulic pressure relief valve is characterized in that an oil return pipe joint (4) with an electric control pressure relief function is arranged on the rail pipe (2), and the oil return pipe joint (4) is in sealing connection with the rail pipe (2) through threads.
6. A light weight high pressure oil rail according to claim 3, characterized in that: the hydraulic pressure relief valve is characterized in that an oil return pipe joint (4) with an electric control pressure relief function is arranged on the rail pipe (2), and the oil return pipe joint (4) is in sealing connection with the rail pipe (2) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188065.9A CN111520266A (en) | 2020-03-17 | 2020-03-17 | Lightweight high-pressure oil rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010188065.9A CN111520266A (en) | 2020-03-17 | 2020-03-17 | Lightweight high-pressure oil rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111520266A true CN111520266A (en) | 2020-08-11 |
Family
ID=71910639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010188065.9A Pending CN111520266A (en) | 2020-03-17 | 2020-03-17 | Lightweight high-pressure oil rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520266A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030042735A1 (en) * | 2000-03-06 | 2003-03-06 | Steffen Jung | High-pressure fuel accumulator |
| JP2005009394A (en) * | 2003-06-18 | 2005-01-13 | Usui Kokusai Sangyo Kaisha Ltd | Connection structure for common rail branch connector |
| US20050045152A1 (en) * | 2002-05-07 | 2005-03-03 | Zander Eckbert Uwe | Fuel distribution pipe for motor vehicle injection devices, in particular for common rail systems |
| JP2007056816A (en) * | 2005-08-26 | 2007-03-08 | Usui Kokusai Sangyo Kaisha Ltd | Connection structure for branched connection pipe |
| CN109595109A (en) * | 2018-12-03 | 2019-04-09 | 成都威特电喷有限责任公司 | A kind of combination current-limiting type high pressure oil rail |
| CN212337504U (en) * | 2020-03-17 | 2021-01-12 | 成都威特电喷有限责任公司 | Auxiliary supporting type high-pressure oil reservoir |
-
2020
- 2020-03-17 CN CN202010188065.9A patent/CN111520266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030042735A1 (en) * | 2000-03-06 | 2003-03-06 | Steffen Jung | High-pressure fuel accumulator |
| US20050045152A1 (en) * | 2002-05-07 | 2005-03-03 | Zander Eckbert Uwe | Fuel distribution pipe for motor vehicle injection devices, in particular for common rail systems |
| JP2005009394A (en) * | 2003-06-18 | 2005-01-13 | Usui Kokusai Sangyo Kaisha Ltd | Connection structure for common rail branch connector |
| JP2007056816A (en) * | 2005-08-26 | 2007-03-08 | Usui Kokusai Sangyo Kaisha Ltd | Connection structure for branched connection pipe |
| CN109595109A (en) * | 2018-12-03 | 2019-04-09 | 成都威特电喷有限责任公司 | A kind of combination current-limiting type high pressure oil rail |
| CN212337504U (en) * | 2020-03-17 | 2021-01-12 | 成都威特电喷有限责任公司 | Auxiliary supporting type high-pressure oil reservoir |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200811 |
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| WD01 | Invention patent application deemed withdrawn after publication |