CN201025200Y - Pin valve coupling part for oil sprayer - Google Patents
Pin valve coupling part for oil sprayer Download PDFInfo
- Publication number
- CN201025200Y CN201025200Y CNU200720035852XU CN200720035852U CN201025200Y CN 201025200 Y CN201025200 Y CN 201025200Y CN U200720035852X U CNU200720035852X U CN U200720035852XU CN 200720035852 U CN200720035852 U CN 200720035852U CN 201025200 Y CN201025200 Y CN 201025200Y
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- valve
- needle
- needle valve
- angle
- fuel
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Abstract
The utility model relates to a fuel spraying device for the 280 series diesel engine of diesel locomotive, in particular to the needle valve coupling piece of a fuel injector, comprising a needle valve and a needle valve body. The needle valve is orderly provided with, from the front to the back, a front guide angle, a main sealing conical surface, an auxiliary angle, a valve rod and a guide cylinder surface. The outer diameter of the upper valve rod of the needle valve and the inner diameter of the two-stage hole of the needle valve body form a ring clearance allowing the fuel flowing through; and the radial clearance between the two sides of the ring clearance is 1.3 millimeters to 2.4 millimeters. Moreover, the conical vertex angle of the conical surface at the auxiliary angle is 40 degrees; and the outer circle of the guide cylinder surface is provided with at least a ring oil groove. The utility model can reduce the work heat load of the needle valve coupling piece in a large scale; the main seal conical surface on the needle valve is seldom damaged, having a long service life; and the front guide angle is for increasing the flowing volume of the fuel and improving the fire performance of the 280 diesel engine; besides, the utility model is proved to have perfect effect of reducing the fuel consumption rate, thereby further promising normal work for the diesel engine of the diesel locomotive.
Description
Technical field
The utility model relates to the fuel injection apparatus of internal combustion locomotive 280 serial diesel engines, and especially a kind of pintle nozzle match-ing parts of oil sprayer comprises needle-valve and needle-valve body.
Background technique
Oil sprayer is one of critical component of diesel engine, and the quality of its performance directly influences the combustion performance of diesel engine and the working life of oil consumption and diesel engine, and the shortcoming that the oil sprayer of existing internal combustion locomotive 280 serial diesel engines mainly exists has: one, atomization badness; Two, oil dripping; Three, needle-valve clamping stagnation; Four, working life is short.The reason of these shortcomings of oil sprayer mainly is due to the reasons such as the pintle nozzle match-ing parts structural design, size, material, heat treatment process owing to oil sprayer, the final damage of oil sprayer also major part is because the primary seal conical surface on the fuel injector needle valve coupling damages because of holding heat load that can't stand burning chamber of diesel engine, and needle-valve and needle-valve body must be complete replacings; At present, a lot of manufacturers, scientific research institution also manage to propose various solutions for the performance that improves internal combustion locomotive 280 serial diesel engine oil sprayers, but never obtain obvious effects.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of novel internal combustion locomotive 280 serial diesel engine fuel injector needle valve couplings are provided, overcome the deficiency that the proper functioning of diesel engine lacked, further has influence on working life by the primary seal conical surface that has now on the oil-fuel injector needle-valve easy damage causing oil sprayer.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of fuel injector needle valve coupling, comprise needle-valve and needle-valve body, needle-valve is structurally from being followed successively by angle of lead, the primary seal conical surface, secondary angle, valve rod and guide cylinder face foremost backward, the external diameter at needle-valve upper valve rod place and the internal diameter of needle-valve body form the annular space that allows fuel oil to flow through, and the radially bilateral gap of described annular space is 1.3 millimeters～2.4 millimeters.
Specifically: described valve rod external diameter is φ 5.9
0 -0.075Millimeter, the internal diameter with second order hole, valve rod cooperation place on the needle-valve body is 8.2 millimeters of φ 7.2～φ, it is in order to improve the anti-erosiveness at valve rod place, to increase the service life that 5.8 millimeters of existing valve rod external diameter φ are increased to 5.9 millimeters of φ.Further will be designed to 7.8 ± 0.1 millimeters of φ with the internal diameter in second order hole, valve rod cooperation place on the described needle-valve body.
Specifically: the cone-apex angle of place, the secondary angle conical surface of described needle-valve is 40 degree, reaches the purpose of the axial dimension that increases secondary angle and the conical surface at secondary angle and amasss, thereby improve the anti-cavitation pitting ability at secondary angle.
Specifically: described guide cylinder face is provided with an annular oil groove on the outer ring at least.
More particularly: described guide cylinder face outer ring is provided with two annular oil grooves.
Again principle of the present utility model is described further below:
At first, overcome the technology prejudice that people require oil-fuel injector needle-valve valve stem gap, people generally were the atomizing effects of pursuing oil sprayer simply in the past, and with the bilateral gap design in needle-valve valve stem and needle-valve body second order hole for being no more than 1.1 millimeters, the fuel oil that can fill in the gap in needle-valve valve stem and needle-valve body second order hole is less, and in the working procedure, needle-valve valve rod front end can not get cooling off preferably under the situation of high temperature, so the primary seal conical surface on the needle-valve is damaged by high temperature erosion easily; In fact the reason that determines the atomizing effect of oil sprayer is many-sided, the gap length in needle-valve valve stem and needle-valve body second order hole is not a chief reason, suitably increase the gap in needle-valve valve stem and needle-valve body second order hole, increase the amount of fuel that to fill in the gap, can utilize more fuel oil that the needle-valve valve rod is cooled off preferably like this, also easier atomizing after fuel oil is heated up simultaneously.The purpose that increases angle of lead in addition is to improve the discharge value of fuel oil, improves the combustion performance of 280 diesel engines, reduces fuel consumption rate, experimental results show that respond well.
Secondly, the cone-apex angle of place, the secondary angle conical surface is 40 degree, reaches the purpose of the axial dimension that increases secondary angle and the conical surface at secondary angle and amasss, thereby improve the anti-cavitation pitting ability at secondary angle, make on the needle-valve connecting part at secondary angle and the primary seal conical surface not fragile, can further improve the usability of whole pintle nozzle match-ing parts.
At last, be provided with an annular oil groove at least on the guide cylinder face outer ring of needle-valve, operated by rotary motion is two annular oil grooves up and down, obviously, and the effect that annular oil groove can play sealing, lubricate; This place's design annular oil groove is the actual conditions that slightly are worse than the fuel oil quality of developed country in conjunction with China's fuel oil quality, uses annular oil groove can effectively prevent the catching phenomenon of needle-valve in valve body.
The beneficial effects of the utility model are, fuel injector needle valve coupling of the present utility model, the primary seal conical surface on the needle-valve are not easy to damage, and long service life can further guarantee the proper functioning of diesel engine of locomotive.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
1. needle-valves among the figure, 2. valve body, 11. angle of lead, the 12. primary seal conical surfaces, 13. secondary angles, 14. valve rods, 15. guide cylinder faces, 16. annular oil grooves, 3. annular space.
Embodiment
A kind of concrete structure schematic representation of internal-combustion engine fuel injector needle valve coupling as shown in Figure 1, comprise needle-valve 1 and needle-valve body 2, needle-valve 1 is structurally from being followed successively by angle of lead 11, the primary seal conical surface 12, secondary angle 13, valve rod 14 and guide cylinder face 15 foremost backward, the external diameter at needle-valve 1 upper valve rod 14 places and the internal diameter in needle-valve body second order hole 2 form the annular space 3 that allows fluid to flow through, the radially bilateral gap design of annular space 3 is 1.3 millimeters～2.4 millimeters, for 5.8 millimeters of original valve rod 14 external diameter φ, now increase to φ 5.9
0 -0.075Millimeter, the internal diameter with valve rod 14 cooperation places on the needle-valve body second order hole 2 is designed to 7.8 ± 0.1 millimeters of φ; Cone-apex angle as accompanying drawing 1 secondary angle 13 place's conical surfaces is 40 degree; Guide cylinder face 15 outer rings are provided with two annular oil grooves 16.
In a word, main inventive point of the present utility model is: overcome people oil-fuel injector needle-valve valve stem gap is required the technology prejudice of trying one's best little, suitably increase gap value, neither influence the atomization of oil sprayer, can prolong the working life of fuel injector needle valve coupling again greatly.
Claims (6)
1. fuel injector needle valve coupling, comprise needle-valve (1) and needle-valve body (2), needle-valve (1) is structurally from being followed successively by angle of lead (11), the primary seal conical surface (12), secondary angle (13), valve rod (14) and guide cylinder face (15) foremost backward, the internal diameter of external diameter that needle-valve (1) upper valve rod (14) is located and needle-valve body (2) forms the annular space (3) that allows fuel oil to flow through, and it is characterized in that: the radially bilateral gap of described annular space (3) is 1.3 millimeters～2.4 millimeters.
2. fuel injector needle valve coupling according to claim 1 is characterized in that: described valve rod (14) external diameter is φ 5.9
0 -0.075Millimeter, needle-valve body (2) are gone up and the internal diameter in second order hole, valve rod (14) cooperation place is 8.2 millimeters of φ 7.2～φ.
3. fuel injector needle valve coupling according to claim 2 is characterized in that: described needle-valve body (2) is gone up and the internal diameter in second order hole, valve rod (14) cooperation place is 7.8 ± 0.1 millimeters of φ.
4. fuel injector needle valve coupling according to claim 1 is characterized in that: the cone-apex angle that the conical surface is located at the secondary angle (13) of described needle-valve (1) is 40 degree.
5. fuel injector needle valve coupling according to claim 1 is characterized in that: be provided with an annular oil groove (16) at least on guide cylinder face (15) outer ring of described needle-valve (1).
6. fuel injector needle valve coupling according to claim 5 is characterized in that: described guide pillar (15) outer ring is provided with two annular oil grooves (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720035852XU CN201025200Y (en) | 2007-04-16 | 2007-04-16 | Pin valve coupling part for oil sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720035852XU CN201025200Y (en) | 2007-04-16 | 2007-04-16 | Pin valve coupling part for oil sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201025200Y true CN201025200Y (en) | 2008-02-20 |
Family
ID=39099062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720035852XU Expired - Fee Related CN201025200Y (en) | 2007-04-16 | 2007-04-16 | Pin valve coupling part for oil sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201025200Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926904A (en) * | 2012-11-02 | 2013-02-13 | 江苏大学 | Elongated oil nozzle for small bore swirl chamber diesel engine |
| CN112879191A (en) * | 2021-01-15 | 2021-06-01 | 江苏大学 | Surface texture guide sealing needle valve for high-pressure oil injector |
-
2007
- 2007-04-16 CN CNU200720035852XU patent/CN201025200Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926904A (en) * | 2012-11-02 | 2013-02-13 | 江苏大学 | Elongated oil nozzle for small bore swirl chamber diesel engine |
| CN112879191A (en) * | 2021-01-15 | 2021-06-01 | 江苏大学 | Surface texture guide sealing needle valve for high-pressure oil injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SOUTH LOCOMOTIVE COMPANY LIMITED CAR QI SHUYAN Free format text: FORMER OWNER: QISHUYAN LOCOMOTIVE + ROLLING STOCK WORKS, CSR Effective date: 20080328 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080328 Address after: Changzhou City, Jiangsu Province, Yanling Road No. 358, zip code: 213011 Patentee after: CHINA NANCHE GROUP QISHUYAN LOCOMOTIVE VEHICLE Co., Ltd. Address before: Qishuyan District, Changzhou City, Qishuyan Province, Jiangsu 213011, China Patentee before: CSR Qishuyan Locomotive & Rolling Stock Works |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080220 Termination date: 20130416 |