CN211370597U - Novel high-pressure common rail pump one-way oil outlet valve - Google Patents
Novel high-pressure common rail pump one-way oil outlet valve Download PDFInfo
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- CN211370597U CN211370597U CN201922320248.7U CN201922320248U CN211370597U CN 211370597 U CN211370597 U CN 211370597U CN 201922320248 U CN201922320248 U CN 201922320248U CN 211370597 U CN211370597 U CN 211370597U
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- outlet valve
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- sealing ball
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Abstract
A novel high-pressure common rail pump one-way oil outlet valve comprises a plunger sleeve, a sealing ball, an oil outlet valve joint, a spring and a valve rod, wherein the spring, the valve rod and the sealing ball are sequentially arranged in a center hole at the left end of the oil outlet valve joint; the central hole at the left end of the oil outlet valve joint is respectively provided with a sealing ball guide section, a sealing ball limiting section, a spring mounting hole and a valve rod guide section, the sealing ball limiting section and a first sealing conical surface on the oil outlet hole correspond to each other to jointly form an opening and closing space of the sealing ball, meanwhile, at least one groove is formed in the radial positions of the sealing ball guide section and the sealing ball limiting section to form an oil inlet channel, and when the sealing ball is opened, diesel oil enters an oil cavity from the groove; the utility model discloses an increase ball sealer direction section and spacing section, more accurate restriction the direction of motion and the lift of ball sealer, increase the valve rod between ball sealer and the spring, reduced the risk that the spring became invalid.
Description
Technical Field
The invention relates to the technical field of high-pressure common rail fuel pumps of diesel engines, in particular to a novel one-way oil outlet valve of a high-pressure common rail pump.
Background
In the face of increasingly stringent emission regulations and severe energy problems, the use of high pressure common rail fuel injection systems on diesel engines has become one of the major trends in diesel engine technology in the world today. The high-pressure common rail fuel injection system can realize stable high-pressure injection to perfect the combustion process, and can also independently control the fuel injection characteristic, so that the dynamic property, the economical efficiency and the emission property of the diesel engine are greatly improved.
The common rail pump is an important component of a high-pressure common rail fuel injection system, can realize rational control of common rail pressure, has higher requirements on pressure application of the common rail pump in the face of increasingly strict emission regulations, and has higher requirements on elements such as an oil outlet valve and the like.
In a traditional common rail pump, a common oil outlet valve comprises a sealing ball, a spring and a spring seat. When the sealing ball is opened and closed, the direction limitation is not available, and the lift limitation is also not available, and part of the technology only carries out mechanical limitation on the lift, but the direction is still unlimited. The structure causes that the motion track of the sealing ball is not limited, the sealing ball is easy to deviate from the axis, the spring is in direct contact with the sealing ball, the spring is easy to bend, and the risk of abrasion and breakage is high. The uncertainty of the sealing contact point is increased when the sealing ball is closed, the sealing ball irregularly impacts the sealing conical surface of the plunger sleeve at high frequency under the high-speed working condition, and the sealing conical surface and the probability of failure of the sealing ball are increased.
Aiming at the problems, the invention designs a novel high-pressure common rail pump one-way oil outlet valve, a sealing ball guide section and a limit section are added, the motion direction and the lift range of a sealing ball are more accurately limited, a valve rod is added between the sealing ball and a spring, the mass of the valve rod is only one tenth of that of the sealing ball, the risk of failure of the spring is reduced, the weight of a moving part is basically unchanged, and the impact force on the spring and a plunger sleeve sealing conical surface is basically unchanged when the sealing ball is opened and closed.
Disclosure of Invention
A novel high-pressure common rail pump one-way oil outlet valve comprises a plunger sleeve, a sealing ball, an oil outlet valve joint, a spring and a valve rod, wherein the spring, the valve rod and the sealing ball are sequentially arranged in a center hole at the left end of the oil outlet valve joint;
the plunger sleeve is provided with an oil outlet, and the oil outlet is sequentially provided with an oil inlet small hole, a first sealing conical surface, an oil cavity, a second sealing conical surface and a first mounting section; the diameter of the oil cavity is larger than that of the oil inlet small hole and smaller than that of the first mounting section;
the central hole at the left end of the oil outlet valve joint is respectively provided with a sealing ball guide section, a sealing ball limiting section, a spring mounting hole and a valve rod guide section, the sealing ball guide section and the sealing ball limiting section correspond to a first sealing conical surface on the oil outlet hole to jointly form an opening and closing space of the sealing ball, meanwhile, at least one groove is formed in the radial positions of the sealing ball guide section and the sealing ball limiting section to form an oil inlet channel, and when the sealing ball is opened, diesel oil enters an oil cavity from the groove;
the oil outlet valve joint also comprises a third sealing surface and a second mounting section, and the oil outlet valve joint is in sealing contact with and fixedly mounted on the second sealing conical surface and the first mounting section on the oil outlet hole through the third sealing surface and the second mounting section at the right end;
the left side of the sealing surface is radially provided with at least one first oil hole communicated with the center hole at the right end;
the oil outlet valve joint is provided with at least one second oil hole in the radial direction at the spring mounting position.
The aperture of a spring mounting hole in the oil outlet valve joint is smaller than or equal to the aperture of the valve rod guide section.
The oil outlet valve joint sealing ball limiting section is a spherical surface or a conical surface.
And the third sealing surface of the oil outlet valve joint is a spherical surface or a conical surface.
The lift range of the sealing ball is 0.2-1.5 mm.
The valve rod is in clearance fit with the valve rod guide section on the oil outlet valve joint; the valve rod is of a structure with small-diameter bulges at two ends.
And two end faces of the spring are ground flat.
According to the invention, by adding the sealing ball guide section and the limiting section, the movement direction and the lift of the sealing ball are more accurately limited, and the valve rod is added between the sealing ball and the spring, so that the risk of failure of the spring is reduced.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
FIG. 2 is a schematic cross-sectional view of the oil outlet hole of the present invention.
FIG. 3 is a schematic view of the structure of the outlet valve joint of the present invention.
Fig. 4 is a schematic sectional structure view of the oil outlet valve joint of the present invention.
Detailed Description
A novel high-pressure common rail pump one-way oil outlet valve comprises a plunger sleeve 1, a sealing ball 2, an oil outlet valve joint 3, a spring 4 and a valve rod 5, wherein the spring 4, the valve rod 5 and the sealing ball 2 are sequentially arranged in a center hole at the left end of the oil outlet valve joint 3;
the plunger sleeve 1 is provided with an oil outlet hole 11, and the oil outlet hole 11 is sequentially provided with an oil inlet small hole 12, a first sealing conical surface 13, an oil cavity 14, a second sealing conical surface 15 and a first mounting section 16; the aperture of the oil cavity 14 is larger than that of the oil inlet small hole 12 and smaller than that of the first mounting section 16;
a sealing ball guide section 31, a sealing ball limiting section 32, a spring mounting hole 33 and a valve rod guide section 34 are respectively arranged on a central hole at the left end of the oil outlet valve joint 3, the sealing ball guide section 31 and the sealing ball limiting section 32 correspond to the first sealing conical surface 13 on the oil outlet hole 11 to jointly form an opening and closing space of the sealing ball 2, at least one groove 37 is arranged at the radial positions of the sealing ball guide section 31 and the sealing ball limiting section 32 to form an oil inlet channel, and when the sealing ball is opened, diesel oil enters the oil cavity 14 from the groove 37;
the oil outlet valve joint 3 further comprises a third sealing surface 35 and a second mounting section 36, and the oil outlet valve joint 3 is in sealing contact with and fixedly mounted on the second sealing conical surface 15 and the first mounting section 16 on the oil outlet hole 11 through the third sealing surface 35 and the second mounting section 36 at the right end;
the left side of the sealing surface 35 is radially provided with at least one first oil hole 38 communicated with a right central hole 40;
the outlet valve joint 3 is provided with at least one second oil hole 39 radially at the location where the spring 4 is mounted.
The aperture of the spring mounting hole 33 in the oil outlet valve joint 3 is smaller than or equal to the aperture of the valve rod guide section 34.
The oil outlet valve joint 3 sealing ball limiting section 32 is a spherical surface or a conical surface.
The third sealing surface 35 of the oil outlet valve joint 3 is a spherical surface or a conical surface.
The lift range of the sealing ball 2 is 0.2-1.5 mm.
The valve rod 5 is in clearance fit with the valve rod guide section 34 on the oil outlet valve joint 3; the valve rod 5 is of a structure with small-diameter bulges at two ends.
And two end faces of the spring 4 are ground flat.
In the oil outlet valve, the sealing ball 2 is in sealing contact with the first sealing conical surface 13 on the oil outlet hole 11 when the oil outlet valve is in operation. When oil pressure at the oil inlet 12 is greater than external oil pressure, the sealing ball 2 is opened, the valve rod 5 is pushed rightwards, the compression spring 4 is limited after being contacted with the limiting section 32, and when the oil pressure of the oil inlet 12 is reduced, the sealing ball 2 is closed at the first sealing conical surface 13 by resetting the spring 4. The first sealing conical surface 13, the guide section 31 and the limiting section 32 form a similar oblong shape, the motion track of the sealing ball 2 when the sealing ball is closed and opened is limited by the direction and the lift, and the aperture of the limiting section of the guide section is 0.1mm larger than the ball diameter of the sealing ball. After the track of the sealing ball is limited, the first contact point is positioned on the sealing ring belt when the sealing ball is closed and seated, the seating is stable, and the sealing conical surface cannot be impacted irregularly when the sealing ball is closed. Diesel fuel enters the oil chamber section 14 from the groove 37 and then flows out through the first oil outlet 38 and the central bore 40. A valve rod 5 is arranged between the sealing ball 2 and the spring 4, and the spring 4 is stressed uniformly and is not easy to wear and break.
Claims (7)
1. The utility model provides a novel one-way delivery valve of high pressure common rail pump which characterized in that: the oil outlet valve comprises a plunger sleeve (1), a sealing ball (2), an oil outlet valve joint (3), a spring (4) and a valve rod (5), wherein the spring (4), the valve rod (5) and the sealing ball (2) are sequentially arranged in a center hole at the left end of the oil outlet valve joint (3);
an oil outlet (11) is formed in the plunger sleeve (1), and an oil inlet small hole (12), a first sealing conical surface (13), an oil cavity (14), a second sealing conical surface (15) and a first mounting section (16) are sequentially formed in the oil outlet (11); the aperture of the oil cavity (14) is larger than that of the oil inlet small hole (12) and smaller than that of the first mounting section (16);
a sealing ball guide section (31), a sealing ball limiting section (32), a spring mounting hole (33) and a valve rod guide section (34) are respectively arranged on a center hole at the left end of the oil outlet valve joint (3), the sealing ball guide section (31) and the sealing ball limiting section (32) correspond to a first sealing conical surface (13) on the oil outlet hole (11) to jointly form an opening and closing space of the sealing ball (2), at least one groove (37) is formed in the radial positions of the sealing ball guide section (31) and the sealing ball limiting section (32) to form an oil inlet channel, and when the sealing ball is opened, diesel oil enters the oil cavity (14) from the groove (37);
the oil outlet valve joint (3) further comprises a third sealing surface (35) and a second mounting section (36), and the oil outlet valve joint (3) is in sealing contact with and fixedly mounted on a second sealing conical surface (15) and a first mounting section (16) on the oil outlet hole (11) through the third sealing surface (35) and the second mounting section (36) at the right end;
the left side of the sealing surface (35) is radially provided with at least one first oil hole (38) which is communicated with a right central hole (40);
the oil outlet valve joint (3) is provided with at least one second oil hole (39) in the radial direction at the installation position of the spring (4).
2. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: the aperture of a spring mounting hole (33) in the oil outlet valve joint (3) is smaller than or equal to the aperture of a valve rod guide section (34).
3. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: the sealing ball limiting section (32) of the oil outlet valve joint (3) is a spherical surface or a conical surface.
4. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: and the third sealing surface (35) of the oil outlet valve joint (3) is a spherical surface or a conical surface.
5. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: the lift range of the sealing ball (2) is 0.2-1.5 mm.
6. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: the valve rod (5) is in clearance fit with a valve rod guide section (34) on the oil outlet valve joint (3); the valve rod (5) is of a structure with small-diameter bulges at two ends.
7. The novel high-pressure common rail pump one-way oil outlet valve of claim 1, is characterized in that: and two end faces of the spring (4) are ground flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320248.7U CN211370597U (en) | 2019-12-23 | 2019-12-23 | Novel high-pressure common rail pump one-way oil outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320248.7U CN211370597U (en) | 2019-12-23 | 2019-12-23 | Novel high-pressure common rail pump one-way oil outlet valve |
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| Publication Number | Publication Date |
|---|---|
| CN211370597U true CN211370597U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922320248.7U Active CN211370597U (en) | 2019-12-23 | 2019-12-23 | Novel high-pressure common rail pump one-way oil outlet valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901388A (en) * | 2021-03-03 | 2021-06-04 | 上海钧风电控科技有限公司 | Lightweight large-flow oil valve plunger assembly and high-pressure oil pump |
-
2019
- 2019-12-23 CN CN201922320248.7U patent/CN211370597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901388A (en) * | 2021-03-03 | 2021-06-04 | 上海钧风电控科技有限公司 | Lightweight large-flow oil valve plunger assembly and high-pressure oil pump |
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