CN103114947A - Common rail pump oil inlet and outlet combination valve - Google Patents
Common rail pump oil inlet and outlet combination valve Download PDFInfo
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- CN103114947A CN103114947A CN2013100478108A CN201310047810A CN103114947A CN 103114947 A CN103114947 A CN 103114947A CN 2013100478108 A CN2013100478108 A CN 2013100478108A CN 201310047810 A CN201310047810 A CN 201310047810A CN 103114947 A CN103114947 A CN 103114947A
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Abstract
The invention relates to a common rail oil inlet and outlet combination valve which is simple in structure, improves reliability of valve operation, and reduces the processing cost. The common rail oil inlet and outlet combination valve comprises an oil outlet ball valve, a valve base and a plane oil inlet valve. A through hole which penetrates through is formed in the valve base. The oil outlet valve is arranged on a conical surface which is arranged at an outlet above the through hole. An oil outlet valve spring is arranged above the oil outlet valve. A valve base ring groove corresponding to the position of a common rail pump oil inlet hole is arranged in the outer side wall of the valve base. A channel which leads to the lower end face of the valve base and is used for communicating the oil inlet hole and a common rail pump plunger cavity is arranged in the valve base ring groove. The plane oil inlet valve is arranged below the vale base. A channel is arranged on the plane oil inlet valve, and an oil inlet valve spring is arranged below the plane oil inlet valve. When the plane oil inlet valve presses the valve base, the upper plane of the oil inlet valve is tightly attached to the lower surface of the valve base, seals an opening, below the valve base, of the channel, and the channel is communicated with the through hole. The common rail oil inlet and outlet combination valve is simple in structure, can improve the reliability of operation, and reduces processing cost.
Description
Technical field
The present invention relates to diesel fuel system accessory field, particularly the oily combination brake switch and proporting of a kind of turnover of rail pump altogether.
Background technique
In high-pressure common rail oil feed pump plunger coupled parts, oiling valve and outlet valve are installed, during oil-feed, outlet valve cuts out, and oiling valve is opened, and plunger is descending, and plunger cavity sucks fuel oil from low pressure oil way.During force feed, plunger is up, and oiling valve cuts out, and outlet valve is opened, and the high pressure fuel in plunger cavity is pressed onto in common rail pipe.Oiling valve and outlet valve were general in the past arranges with the plunger disalignment, and make the plunger bushing complex structure, high pressure sealing is difficult.Patent CN101094983A is with oiling valve and outlet valve coaxial arrangement (seeing Fig. 5), and structure is compact, but oiling valve and outlet valve are two independently baroque cone valves, come the sealed high pressure fuel oil by high precision plane between valve and valve.High pressure sealing face is many, difficult processing, and cost is high.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, improve the reliability of valve work, the oily combination brake switch and proporting of common rail pump turnover that cuts down finished cost.
The object of the present invention is achieved like this: it comprises fuel-displaced ball valve 4, valve seat 5, plane oiling valve 6, it is characterized in that: the through hole that is provided with up/down perforation in valve seat 5, fuel-displaced ball valve 4 is arranged on the conical surface 5.1 that outlet port, through hole top is provided with, and the top of fuel-displaced ball valve 4 is provided with oil outlet valve spring 3; The outer side wall of valve seat 5 is provided with valve seat annular groove 5.4 corresponding to rail pump oil inlet hole 2.1 positions together, is provided with in valve seat annular groove 5.4 to lead to valve seat 5 lower end surfaces, be used for UNICOM's oil inlet hole 2.1 passage in rail pump plunger chamber 9 together; Plane oiling valve 6 is arranged on valve seat 5 belows, be provided with path on plane oiling valve 6, the below of plane oiling valve 6 is provided with oiling valve spring 7, when plane oiling valve 6 presses valve seat 5, the opening that valve seat lower surface and sealing channel are positioned at valve seat 5 belows is close on the upper plane of plane oiling valve 6, and path and through hole UNICOM.
The present invention has the following advantages: simple in structure, improve the reliability of valve work, and cut down finished cost.
Description of drawings
Fig. 1 is one of embodiments of the invention;
Fig. 2 is one of embodiments of the invention;
Fig. 3 is the sectional view of Fig. 2 A-A face;
Fig. 4 is that the oiling valve spring is volute spring;
Fig. 5 is the structural representation of prior art patent CN10104983 turnover fuel tap.
Label declaration
1, delivery valve holder; 1.1, high-pressure oil duct; 1.2, the delivery valve holder lower end surface; 2, plunger bushing; 2.1, oil inlet hole; 2.2, receive along the upper-end surface; 2.3, shoulder; 3, oil outlet valve spring; 4, ball valve; 5, valve seat; 5.1, the outlet valve conical surface; 5.2, the valve seat end face; 5.3, radial direction oil hole; 5.4, the valve seat annular groove; 5.5, oilhole; 5.6, the valve seat bottom surface; 5.7, ring recess; 5.8, valve base center hole; 5.9, the short oil hole; 5.10, inclined oil hole of air; 6, plane oiling valve; 6.1, plane on the oiling valve of plane; 6.2, the flat valve mesopore; 6.3 straight trough; 7, oiling valve spring; 8 plungers; 8.1, plunger head; 9, plunger cavity; 10, oil outlet valve spring seat; 11, pad;
Embodiment
As shown in Fig. 1～2: it comprises fuel-displaced ball valve 4, valve seat 5, plane oiling valve 6, it is characterized in that: be provided with the through hole of up/down perforation in valve seat 5, fuel-displaced ball valve 4 is arranged on the conical surface 5.1 that outlet port, through hole top is provided with, the sealed high pressure fuel oil.The top of fuel-displaced ball valve 4 is provided with oil outlet valve spring 3; The outer side wall of valve seat 5 is provided with valve seat annular groove 5.4 corresponding to rail pump oil inlet hole 2.1 positions together, is provided with in valve seat annular groove 5.4 to lead to valve seat 5 lower end surfaces, be used for UNICOM's oil inlet hole 2.1 passage in rail pump plunger chamber 9 together; Plane oiling valve 6 is arranged on valve seat 5 belows, be provided with path on plane oiling valve 6, the below of plane oiling valve 6 is provided with oiling valve spring 7, when plane oiling valve 6 presses valve seat 5, the opening that valve seat lower surface and sealing channel are positioned at valve seat 5 belows is close on the upper plane of plane oiling valve 6, and path and through hole UNICOM.When using, fuel-displaced ball valve 4, valve seat 5, plane oiling valve 6 coordinate oil outlet valve spring 3 and oiling valve spring 7 to be located among plunger bushing 2, in installation process, delivery valve holder lower end surface 1.2 is pressed on valve seat end face 5.2, also valve seat bottom surface 5.6 is pressed in simultaneously receipts in plunger bushing 2 along on upper-end surface 2.2, the sealed high pressure fuel oil.Oiling valve spring 7 one ends are sleeved on the plunger head 8.1 of plunger 8, and the other end is pressed in plane 6.1 on the oiling valve of plane oiling valve 6 on the valve seat bottom surface 5.6 of valve seat 5, covers ring recess 5.7, are used for seal groove 5.7.The valve seat bottom surface 5.6 here, receive along the upper-end surface 2.2, valve seat end face 5.2, delivery valve holder lower end surface 1.2 is high-precision surface.
Because position, the structure of through hole and valve base channel are different, the present invention can be divided into following two kinds of embodiments;
Embodiment 1:
With reference to figure 1: the through hole of valve seat 5 is the valve base center hole 5.8 coaxial with valve seat 5 axle center, be provided with the ring recess 5.7 of annular around the lower surface of valve seat 5, valve base center hole 5.8 under sheds, the mutual UNICOM of the passage of valve seat radial direction oil hole 5.3 and oilhole 5.8, radial direction oil hole 5.3 entrance points are positioned at valve seat annular groove 5.4, the ring recess 5.7 that is positioned at valve seat 5 bottoms of oilhole 5.8 outlet end;
Described path is the flat valve mesopore 6.2 with plane oiling valve 6 concentrics and up/down perforation,
When valve seat 5 bottom is close on the upper plane of plane oiling valve 6, flat valve mesopore 6.2 and valve base center hole 5.8 UNICOMs, other parts of the upper surface of plane oiling valve 6 are close to ring recess 5.7 belows.
The distance of the outer edge of ring recess 5.7 inside edges and endoporus 5.8 is the 0.5-2 millimeter.
Working principle:
The oil-feed process, fuel-displaced ball valve 4 is closed, and plunger 8 is descending, and the pressure drop in plunger cavity 9, the fuel oil oilhole 2.1 from plunger bushing enters valve seat annular groove 5.4 on valve seat 5, enters in ring recess 5.7 through radial direction oil hole 5.3 and oilhole 5.5.When low-voltage fuel acts on power on oiling valve 6 greater than the pressure of oiling valve spring 7, the plane oiling valve end face 6.1 of flat valve 65 the valve seat bottom surface 5.6 of lifting off a seat, low-voltage fuel is from the gap between valve seat bottom surface 5.6 and plane oiling valve end face 6.1, through the flat valve mesopore 6.2 in flat valve 6, flow in plunger cavity 9, until plunger goes downwards to lower dead center, oil-feed finishes.
Fuel-displaced process: plunger rises, fuel pressure in plunger cavity 9 rises, and oiling valve spring 7 is pressed in valve seat bottom surface 5.6 with the plane oiling valve end face 6.1 of flat valve 6, forms sealing, high pressure fuel in plunger cavity 9 is sealed in plunger cavity 9, prevents that high pressure fuel from flowing in the ring recess 5.7 of low pressure.High pressure fuel can only be in flat valve 6 flat valve mesopore 6.2 and the valve base center hole 5.8 in valve seat 5, enter the bottom of ball valve 4, overcome by flowing back to high pressure fuel in delivery valve holder 1 and oil outlet valve spring 3 in common rail pipe and act on pressure on ball valve 4, push ball valve open, flow through hole and the high-pressure oil duct in delivery valve holder 1.1 in oil outlet valve spring seat 10, flow in high-pressure common rail and go, complete the force feed process.
Embodiment 2
With reference to figure 2,3
Valve base channel comprises mutual UNICOM radial direction oil hole 5.3 and short oil hole 5.9, radial direction oil hole 5.3 entrance points are positioned at valve seat annular groove 5.4, the center that is positioned at valve seat 5 bottoms of short oil hole 5.9 outlet end, be provided with all annular ring recess 5.7 around 5.9 outlet end of short oil hole, the through hole of valve seat 5 is the inclined oil hole of air 5.10 that the upper end outlet is positioned at center, valve seat upper-end surface, lower end outlet UNICOM ring recess; Described path is the straight trough 6.3 that the side of plane oiling valve 6 is provided with up/down perforation;
When valve seat 5 bottom is close on the upper plane of plane oiling valve 6, straight trough 6.3 and ring recess 5.7 UNICOMs.
The quantity of straight trough is between 1～4, and straight trough is equally distributed on the side of plane oiling valve 6.
The distance of the outer edge of ring recess 5.7 inside edges and flat valve mesopore 6.2 is the 0.5-2 millimeter.
Working principle
The oil-feed process: fuel-displaced ball valve 4 is closed, plunger 8 is descending, pressure drop in plunger cavity 9, the oil inlet hole 2.1 of fuel oil from plunger bushing 2 enters annular groove 5.4 on valve seat 5, through radial direction oil hole 5.3 and short oil hole 5.9, be pressed on the plane oiling valve end face 6.1 of flat valve 6, overcome the pressure of oil-feed spring 7, make plane oiling valve end face 6.1 bottom surface 5.6 of lifting off a seat, fuel oil is from the gap between plane oiling valve end face 6.1 and valve seat bottom surface 5.6, flow in plunger cavity 9 by the several straight troughs 6.3 on flat valve 6, until plunger goes downwards to lower dead center, oil-feed finishes.
fuel-displaced process: plunger rises, fuel pressure in plunger cavity 9 rises, oiling valve spring 7 and fuel pressure are pressed in plane oiling valve end face 6.1 on the valve seat bottom surface 5.6 of valve seat 5, seal short oil hole 5.9, high pressure fuel in plunger cavity 9 flows in ring recess 5.7 by the straight trough 6.3 on flat valve 6, enter again the bottom of ball valve 4 through inclined oil hole of air 5.10, overcome by flowing back to high pressure fuel in delivery valve holder 1 and oil outlet valve spring 3 in common rail pipe and act on pressure on ball valve 4, push ball valve 4 open, endoporus in oil outlet valve spring seat 10 and the high-pressure oil duct in delivery valve holder 1.1, flow in high-pressure common rail and go.Complete the force feed process.
Fig. 4 is the scheme that oiling valve spring of the present invention 7 adopts volute springs, and volute spring one end withstands on plane oiling valve 6, and the other end is not to be enclosed within on plunger head 8.1, but is pressed on pad 11 in plunger bushing 2, and pad 11 is embedded on shoulder 2.3 in plunger bushing 2.The characteristic of volute spring can not change with the motion of plunger 8.
Claims (7)
1. one kind is total to the oily combination brake switch and proporting of rail pump turnover, it comprises fuel-displaced ball valve (4), valve seat (5), plane oiling valve (6), it is characterized in that: the through hole that is provided with up/down perforation in valve seat (5), fuel-displaced ball valve (4) is arranged on the conical surface (5.1) that outlet port, through hole top is provided with, and the top of fuel-displaced ball valve (4) is provided with oil outlet valve spring (3); (5 outer side wall is provided with valve seat annular groove (5.4) corresponding to rail pump oil inlet hole (2.1) position together to valve seat, is provided with in valve seat annular groove (5.4) to lead to valve seat (5) lower end surface, be used for UNICOM's oil inlet hole (2.1) passage of rail pump plunger chamber (9) together; Plane oiling valve (6) is arranged on below valve seat (5), be provided with path on plane oiling valve (6), the below of plane oiling valve (6) is provided with oiling valve spring (7), when plane oiling valve (6) presses valve seat (5), the opening that valve seat lower surface and sealing channel are positioned at valve seat (5) below is close on the upper plane of plane oiling valve (6), and path and through hole UNICOM.
2. rail pump altogether according to claim 1 passes in and out oily combination brake switch and proporting, it is characterized in that: the through hole of valve seat (5) is the valve base center hole (5.8) coaxial with valve seat (5) axle center, be provided with the ring recess (5.7) of annular around the lower surface of valve seat 5, valve base center hole (5.8) under shed, the mutual UNICOM of the passage of valve seat radial direction oil hole (5.3) and oilhole (5.8), radial direction oil hole (5.3) entrance point is positioned at valve seat annular groove (5.4), the ring recess (5.7) that is positioned at valve seat (5) bottom of oilhole (5.8) outlet end;
Described path is the flat valve mesopore (6.2) with plane oiling valve (6) concentric and up/down perforation,
When valve seat (5) bottom was close on the upper plane of plane oiling valve (6), flat valve mesopore (6.2) was close to below ring recess (5.7) with valve base center hole (5.8) UNICOM, other parts of upper surface of plane oiling valve (6).
3. rail pump altogether according to claim 1 passes in and out oily combination brake switch and proporting, it is characterized in that: valve base channel comprises mutual UNICOM radial direction oil hole (5.3) and short oil hole (5.9), radial direction oil hole (5.3) entrance point is positioned at valve seat annular groove (5.4), the center that is positioned at valve seat (5) bottom of short oil hole (5.9) outlet end, be provided with all annular ring recess (5.7) around the outlet end of short oil hole (5.9), the through hole of valve seat (5) is the inclined oil hole of air (5.10) that the upper end outlet is positioned at center, valve seat upper-end surface, lower end outlet UNICOM ring recess; Described path is the straight trough (6.3) that the side of plane oiling valve (6) is provided with up/down perforation;
When valve seat (5) bottom is close on the upper plane of plane oiling valve (6), straight trough (6.3) and ring recess (5.7) UNICOM.
4. rail pump altogether according to claim 3 passes in and out oily combination brake switch and proporting, and it is characterized in that: the quantity of straight trough is between 1～4, and the straight trough more than 2 is equally distributed on the side of plane oiling valve (6).
5. rail pump altogether according to claim 2 passes in and out oily combination brake switch and proporting, and it is characterized in that: the distance of ring recess (5.7) inside edge and endoporus (5.8) outer edge is the 0.5-2 millimeter.
6. rail pump altogether according to claim 3 passes in and out oily combination brake switch and proporting, and it is characterized in that: the distance of ring recess (5.7) inside edge and flat valve mesopore (6.2) outer edge is the 0.5-2 millimeter.
7. rail pump altogether according to claim 1 passes in and out oily combination brake switch and proporting, and it is characterized in that: the oiling valve spring can be used volute spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100478108A CN103114947A (en) | 2013-02-06 | 2013-02-06 | Common rail pump oil inlet and outlet combination valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100478108A CN103114947A (en) | 2013-02-06 | 2013-02-06 | Common rail pump oil inlet and outlet combination valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103114947A true CN103114947A (en) | 2013-05-22 |
Family
ID=48413370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100478108A Pending CN103114947A (en) | 2013-02-06 | 2013-02-06 | Common rail pump oil inlet and outlet combination valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103114947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573507A (en) * | 2013-10-13 | 2014-02-12 | 成都威特电喷有限责任公司 | Composite in-out oil valve common rail oil pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4551077A (en) * | 1984-03-22 | 1985-11-05 | Butterworth Inc. | High pressure pump |
| JP2006183647A (en) * | 2004-12-28 | 2006-07-13 | Bosch Corp | Fuel supply pump |
| CN101113707A (en) * | 2007-08-13 | 2008-01-30 | 无锡威孚集团有限公司 | Ball valve type high pressure shared-rail oil jetting pump |
| JP2009091956A (en) * | 2007-10-05 | 2009-04-30 | Yanmar Co Ltd | Supply pump |
| CN102102611A (en) * | 2011-03-14 | 2011-06-22 | 福建省莆田市中涵机动力有限公司 | In-line type fuel feed pump of high-pressure common rail system |
| CN202001162U (en) * | 2010-12-07 | 2011-10-05 | 中国第一汽车集团公司无锡油泵油嘴研究所 | Oil-taking metering valve controlled common-rail oil feed pump |
| CN203081630U (en) * | 2013-02-06 | 2013-07-24 | 福建省莆田市中涵机动力有限公司 | Oil inlet-outlet combination valve of common-rail pump |
-
2013
- 2013-02-06 CN CN2013100478108A patent/CN103114947A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4551077A (en) * | 1984-03-22 | 1985-11-05 | Butterworth Inc. | High pressure pump |
| JP2006183647A (en) * | 2004-12-28 | 2006-07-13 | Bosch Corp | Fuel supply pump |
| CN101113707A (en) * | 2007-08-13 | 2008-01-30 | 无锡威孚集团有限公司 | Ball valve type high pressure shared-rail oil jetting pump |
| JP2009091956A (en) * | 2007-10-05 | 2009-04-30 | Yanmar Co Ltd | Supply pump |
| CN202001162U (en) * | 2010-12-07 | 2011-10-05 | 中国第一汽车集团公司无锡油泵油嘴研究所 | Oil-taking metering valve controlled common-rail oil feed pump |
| CN102102611A (en) * | 2011-03-14 | 2011-06-22 | 福建省莆田市中涵机动力有限公司 | In-line type fuel feed pump of high-pressure common rail system |
| CN203081630U (en) * | 2013-02-06 | 2013-07-24 | 福建省莆田市中涵机动力有限公司 | Oil inlet-outlet combination valve of common-rail pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573507A (en) * | 2013-10-13 | 2014-02-12 | 成都威特电喷有限责任公司 | Composite in-out oil valve common rail oil pump |
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Application publication date: 20130522 |