CN202187850U - In-line type oil supply pump of high pressure common rail system - Google Patents
In-line type oil supply pump of high pressure common rail system Download PDFInfo
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- CN202187850U CN202187850U CN2011200652191U CN201120065219U CN202187850U CN 202187850 U CN202187850 U CN 202187850U CN 2011200652191 U CN2011200652191 U CN 2011200652191U CN 201120065219 U CN201120065219 U CN 201120065219U CN 202187850 U CN202187850 U CN 202187850U
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Abstract
The utility model relates to an in-line type oil supply pump of a high pressure common rail system, which is simple in structure and easy to manufacture and comprises a double-cylinder in-line oil supply pump. A cam shaft of the double-cylinder in-line oil supply pump is provided with an oil line group provided with two groups of mutually independent cam mechanisms and communicated with the cam mechanisms. The two groups of cam mechanisms are fixed on the cam shaft of a pump body through eccentric wheels, and eccentric circle radial directions of eccentric circles of the two groups of cam mechanisms disposed on the cam shaft are opposite. A valve seat shared by an oil inlet ball valve and an oil outlet ball valve is further disposed above the cam mechanisms. The in-line type oil supply pump of the high pressure common rail system is characterized in that two valves share one valve seat, an oil valve conical surface is processed at the upper end of the valve seat, an oil inlet valve conical surface is processed at the lower end of the valves, and oil holes are respectively connected to the middle. High pressure fuel oil is not concentrated in the pump body, and two high pressure oil pipes directly supply oil to a diesel engine high pressure common rail pipe, thereby greatly simplifying the structure of a high pressure common rail pump, lowering production cost and being convenient for the high pressure common rail fuel system to be applied in diesel engines of light vehicles.
Description
Technical field
Interference and the utility model system for diesel fuel pump, particularly a high-pressure common rail fuel system in-line supply pump.Belong to the diesel fuel system field.
Technical background
Along with China's Abgasgesetz is strict day by day, Europe 4 exhaust method standards will be implemented, and the high-pressure common rail oil-fired system has been that many Diesel Engine Plants accept.At present in domestic small-sized light-duty vehicle 4 cylinder diesels; High-pressure fuel-feed pump is that the rotator type of offshore companies such as BOSCH, DENSO is total to the rail pump mostly; Three oil supply cylinder pumps of typical structure such as Bosch, referring to (yellow quiet male electronic controlled diesel structure and principle [M] People's Transportation Press 2008), its three plunger coupled partss are along the eccentric circle radial equipartition; When the eccentric circle of camshaft rotated, the triangle collar motion that is enclosed within on the eccentric garden made three plungers that high pressure fuel is provided in turn.The high pressure fuel that each plunger produces focuses on a high-pressure oil duct through special sealing mechanism in the pump housing of steel.Deliver to again in the common rail pipe, compact structure, but high pressure sealing is complicated, processing difficulties, and manufacture cost is high.
China's most of light-duty vehicle diesel engine price is very low, and expensive common rail fuel combustion system accounts for the over half of diesel engine cost.So how to reduce the cost that common rail system comprises oil feed pump, to promoting the high-pressure common rail oil-fired system highly significant.
Summary of the invention
The purpose of the utility model is to provide a kind of twin-tub in-line arrangement oil feed pump simple in structure, easy to manufacture.
The purpose of the utility model is achieved in that it comprises twin-tub in-line arrangement oil feed pump, and the camshaft of the twin-tub in-line arrangement oil feed pump pump housing is provided with the oil circuit group with two groups of separate cam mechanisms and UNICOM's cam mechanism; Described two groups of cam mechanisms are fixed on the camshaft of the pump housing through eccentric wheel; And the eccentric circle footpath that the eccentric circle of two groups of cam mechanisms is arranged on the camshaft is in the opposite direction, above cam structure, also is provided with one and brings oily ball valve and fuel-displaced ball valve and fuel inlet ball check valve and the shared valve seat of fuel-displaced ball valve into.
The utility model adopts twin-tub in-line arrangement oil feed pump; Cam mechanism is the annulus of simple eccentric circle and easy processing, adopts sliding bearing, and the turnover fuel tap is used ball valve; Its feature is: the public valve seat of two valves; The valve seat upper end processes the fuel tap conical surface, the lower end processing oiling valve conical surface of valve, and the centre has oilhole to connect respectively.Plunger coupled parts is simple in structure, and is easy to manufacture, directly is pressed on the oil pump body by delivery valve holder; Directly with the corresponding part of mass-produced VE proportioning pump, oil pump is regulated oil mass with the oil-feed proportional electromagnetic valve for oil transfer pump and pressure regulator valve, and high pressure fuel is not concentrated in the pump housing; And directly use two high-pressure oil pipes to diesel engine high-pressure co-rail pipe fuel feeding; Simplify the high-pressure common rail pump structure greatly, reduced manufacture cost, be convenient to the application of high-pressure common rail oil-fired system on the light-duty vehicle diesel engine.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of the oil feed pump of the utility model.
Fig. 2 is the B-B sectional drawing among the utility model Fig. 1.
Fig. 3 is that C among the utility model figure is to view.
Fig. 4 is a D-D sectional drawing among the utility model Fig. 1.
Fig. 5 is an A-A sectional drawing among the utility model Fig. 3.
Label declaration
1 camshaft; 1.2 eccentric circle; 2 pump housings; 2.1 oil duct C; 2.3 oil-feed electromagnetism valve opening; 2.4 oblique oil duct; 2.5 oil duct D; 2.6 back leakage connection hole; 2.7 oil duct G; 2.8 oil duct F; 2.9 oil duct E; 3 sliding bearing A; 4 annulus; 4.1 plane; 5 plunger coupled partss; 5.1 plunger; 5.2 plunger bushing; 5.3 plunger cavity; 6 piston springs; 7 oiling valve springs; 8 ball seats; 9 valve seats; 9.1 inclined hole oil duct; 9.2 the outlet valve conical surface; 9.3 the oiling valve conical surface; 9.4 annular groove; 9.5 cross-drilled hole; 10 fuel inlet ball check valves; 11 fuel-displaced ball valves; 12 delivery valve holders; 12.1 oil duct; 13 oil outlet valve springs; 14 solenoid valves; 15 oil transportation pump seats; 15.1 oil duct A; 15.2 oil duct B; 15.3 the second oil circuit oil duct; 15.4 throttle orifice; 15.5 second annular groove; 16 pressure regulator valves; 17 oil transfer pumps; 18 right thrust washers; 19 regulate pad; 20 left thrust washers; 21 sliding bearing B; 22 bolts; 23 nuts; 24 plunger flange covers; 24.1 passage A; 24.2 channel B; 25 oil return screws; 26 oil-feed screws; 27 throw of eccentric; 28 covers of feed pump.
Embodiment
Further specify the utility model fuel feeding pump structure and working principle below in conjunction with specific embodiment.
Shown in Fig. 1 ~ 4: it comprises twin-tub in-line arrangement oil feed pump the utility model, and the camshaft 1 of the twin-tub in-line arrangement oil feed pump pump housing is provided with the oil circuit group with two groups of separate cam mechanisms and UNICOM's cam mechanism; Described two groups of cam mechanisms are fixed on the camshaft of the pump housing through eccentric wheel; And the eccentric circle footpath that the eccentric circle of two groups of cam mechanisms is arranged on the camshaft is in the opposite direction, above cam structure, also is provided with one and brings oily ball valve 10 and fuel-displaced ball valve 11 and fuel inlet ball check valve and the shared valve seat 9 of fuel-displaced ball valve into.
Described cam mechanism comprises that eccentric circle 1.2, sliding bearing A3, annulus 4, piston spring 6, plunger 5.1, plunger flange cover 24, plunger coupled parts 5, valve seat 9, delivery valve holder 12 constitute; Be fixed with the camshaft 1 with two groups of eccentric circles 1.2 among the sliding bearing B21 in the pump housing 2, the other end of camshaft 1 is supported by oil transportation pump seat 15; Be arranged with the annulus 4 of band sliding bearing A on eccentric circle 1.2 outer rings; The annulus upper surface is processed as plane 4.1, and plunger 5.1 is pressed on the plane 4.1 of annulus through the piston spring 6 in the plunger outside, and the plunger top also is provided with plunger flange cover 24; Plunger flange cover 24 is pressed on the upper-end surface of the pump housing 2 by bolt 22, nut 23; Plunger flange cover below is provided with plunger coupled parts, and plunger coupled parts is set in the plunger bushing 5.2 of plunger periphery by plunger 5.1; With the plunger cavity that is provided with in the plunger 5.3, in plunger flange cover 24, the valve seat 9 of fixation also has been installed above the plunger coupled parts 5; Described valve seat 9 upper and lower end faces are respectively equipped with the outlet valve conical surface 9.2 and the oiling valve conical surface 9.3, and plunger coupled parts 5 tops are provided with fixes and be pressed on the delivery valve holder 12 on the pump housing 2 with valve seat and plunger coupled parts; The outlet valve conical surface 9.2 of valve seat 9 upper ends is provided with fuel-displaced ball valve 11, outlet valve oil duct and the oil outlet valve spring 13 of UNICOM successively; The valve seat 9 lower end oiling valve conical surfaces 9.3 are provided with fuel inlet ball check valve 11 and oiling valve spring 7; Oil outlet valve spring is arranged in the inner chamber of top, delivery valve holder 12 belows of fuel-displaced ball valve 11, and oiling valve spring 7 one ends are enclosed within on the plunger 5.1, and the other end is enclosed within on the ball seat 8 of fuel inlet ball check valve 11 belows; The border also is provided with annular groove 9.4 outside valve seat 9; Annular groove is provided with the cross-drilled hole 9.5 that runs through valve seat 9, and cross-drilled hole 9.5 is connected with the hole that fuel inlet ball check valve 10 is provided with, and inclined hole oil duct 9.1 connects hole and the plunger cavity 5.3 that fuel-displaced ball valve 11 is provided with.Inclined hole oil duct 9.1 symmetric arrangement 1-4 bar as required wherein.
It also comprises the oil circuit group; The oil circuit group comprises first oil circuit, second oil circuit, the 3rd oil circuit, first oil circuit is arranged in order oil-feed screw 26, oil transfer pump 17, pressure regulator valve 16, oil duct A15.1, oil duct B15.2, second annular groove 15.5 of the band cover of feed pump 28 of connection, with the pump housing 2 of oblique oil duct 2.4, bring passage A24.1 on the proportional electromagnetic valve 14 of electromagnetic oil valve opening 2.3, the oil duct C2.1, oil duct D2.5, plunger flange cover 24 on the pump housing 2, channel B 24.2, second annular groove 15.5, plunger cavity 5.3, oil duct E2.9, oil duct F2.8, oil duct G2.7, oil duct D2.5, oil return screw 25, filter cleaner or fuel tank into; Wherein oil duct G2.7 is connected between 2.6 holes, back leakage connection hole and the oil duct D2.5, the second oil circuit oil duct 15.3, oil transfer pump, and oil transfer pump is installed in the oil transportation pump seat 15; The 3rd oil circuit throttle orifice 5.4 pump housings 2 inner chambers.
Wherein, the center of camshaft 1 and plunger 5.1 center lines are provided with throw of eccentric 27, and to the side pressure of plunger bushing 5.2 with to the active force on plane 4.1, throw of eccentric is the 0-3 millimeter when rising to reduce plunger 5.1.
It also comprises the ECU ECU of the output oil mass that is used to regulate oil pump and the solenoid valve 14 of adjustment oil-feed ratio, and described ECU ECU is positioned on the engine body; Described solenoid valve is arranged on the sidewall of pump housing left end or right-hand member.
Wherein oil transfer pump is used the vane pump that the VE proportioning pump is used in the utility model, also available Gerotor pump, and camshaft and pump housing surface of contact also are provided with right thrust washer 18, left thrust washer 20 and adjustment pad 19 on the sidewall of the pump housing.
Working principle
Like Fig. 1, shown in 2; When camshaft 1 rotates; Plunger 5.1 moves down with the plane 4.1 on the garden ring 4 in piston spring 6 effects; Fuel oil gets into through cover of feed pump 28 oil transfer pumps 17 and the pressure regulator valve 16 from oil-feed screw 26, and fuel oil is pressurized to the low-voltage fuel of 1.5-5MPa through oil transfer pump 17, and one the tunnel through oil duct A15.1, oil duct B15.2 and second annular groove 15.5; Oblique oil duct in the pump housing 2 2.4 gets into the oil-feed electromagnetism valve opening 2.3 of proportional electromagnetic valve 14 again; After proportional electromagnetic valve 14 requires to regulate according to diesel engine with ECU, passage A24.1, channel B 24.2, second annular groove 15.5 of fuel oil on the oil duct C2.1 on the pump housing 2, oil duct D2.5 and plunger flange cover 24, the pressure that overcomes the oil-feed spring 7 on the fuel inlet ball check valve 10 gets into plunger cavity 5.3.Another road of low-voltage fuel makes the oil transfer pump proper functioning through oil duct 15.3 to oil transfer pump blade bottom, and throttle orifice 15.4 step-downs of leading up in addition of low-voltage fuel get into the pump housing 2 inner chambers, with cooling oil pump and lubricating bearings.Eccentric circle 1.2 rotations when camshaft 1; The plane 4.1 band plungers 5.1 of annulus 4 rise; Fuel oil in the compression plunger chamber 5.3; Oiling valve spring 7 is pressed on the conical surface 9.3 of valve seat 9 fuel inlet ball check valve 10 with ball seat 8 simultaneously, and high pressure fuel is pushed fuel-displaced ball valve 11 open through oil duct 9.1, directly delivers in the high-pressure common rail pipe through high-pressure oil pipe through the oil duct on the delivery valve holder 12 12.1.Because the utility model is a twin cylinder pump,, whenever supply a high pressure oil to common rail pipe at a distance from 180 degree with two high-pressure oil pipes.The oil mass size that gets into the high-pressure common rail pipe is regulated according to the requirement of diesel engine by oil-feed proportional electromagnetic valve 14 and ECU ECU.Oil duct E2.9, oil duct F2.8, oil duct G2.7, the oil duct D2.5 of post-decompression fuel oil in the pump housing 2 gets back in filter cleaner or the fuel tank to oil return screw 25 in the pump housing 2.
The center of camshaft 1 and plunger 5.1 center lines are provided with throw of eccentric 27; When rising to reduce plunger 5.1 to the side pressure of plunger bushing 5.2 with to the active force on plane 4.1; Throw of eccentric is the 0-3 millimeter, and difference turns to about the rail pump according to being total to, and divides to be located at the center line left and right sides.
Though the utility model is two a cylinders array oil feed pump, also can be designed to the above multi-cylinder oil feed pump of three cylinders with parts such as same plunger and turnover fuel taps.
Claims (7)
1. high pressure co-rail system in-line arrangement oil feed pump, it comprises twin-tub in-line arrangement oil feed pump, it is characterized in that: the camshaft (1) of the twin-tub in-line arrangement oil feed pump pump housing is provided with the oil circuit group with two groups of separate cam mechanisms and UNICOM's cam mechanism; Described two groups of cam mechanisms are fixed on the camshaft of the pump housing through eccentric wheel; And the eccentric circle footpath that the eccentric circle of two groups of cam mechanisms is arranged on the camshaft is in the opposite direction, above cam structure, also is provided with one and brings oily ball valve (10) and fuel-displaced ball valve (11) and fuel inlet ball check valve and the shared valve seat (9) of fuel-displaced ball valve into.
2. high pressure co-rail system in-line arrangement oil feed pump according to claim 1 is characterized in that: described cam mechanism comprises that eccentric circle (1.2), sliding bearing A (3), annulus (4), piston spring (6), plunger (5.1), plunger flange cover (24), plunger coupled parts (5), valve seat (9), delivery valve holder (12) constitute; Be fixed with the camshaft (1) with two groups of eccentric circles (1.2) among the sliding bearing B (21) in the pump housing (2), the other end of camshaft (1) is supported by oil transportation pump seat (15); Be arranged with the annulus (4) of band sliding bearing A (3) on eccentric circle (1.2) outer ring; The annulus upper surface is processed as plane (4.1); Plunger (5.1) is pressed on the plane (4.1) of annulus through the piston spring (6) in the plunger outside; Plunger top also is provided with plunger flange cover (24), and plunger flange cover (24) is pressed on the upper-end surface of the pump housing (2) by bolt (22), nut (23), and plunger flange cover below is provided with plunger coupled parts; Plunger coupled parts is by plunger (5.1); Be set in the plunger cavity (5.3) that is provided with in plunger bushing (5.2) and the plunger of plunger periphery, in plunger flange cover (24), plunger coupled parts (5) top also has been equipped with the valve seat (9) of fixation; Described valve seat (9) upper and lower end face is respectively equipped with the outlet valve conical surface (9.2) and the oiling valve conical surface (9.3), and plunger coupled parts (5) top is provided with fixes and be pressed on the delivery valve holder (12) on the pump housing (2) with valve seat and plunger coupled parts; The outlet valve conical surface (9.2) of valve seat (9) upper end is provided with fuel-displaced ball valve (11), outlet valve oil duct and the oil outlet valve spring (13) of UNICOM successively; Valve seat (9) the lower end oiling valve conical surface (9.3) is provided with fuel inlet ball check valve (11) and oiling valve spring (7); Oil outlet valve spring is arranged in the inner chamber of top, delivery valve holder (12) below of fuel-displaced ball valve (11); Oiling valve spring (7) one ends are enclosed within on the plunger (5.1); The other end is enclosed within on the ball seat (8) of fuel inlet ball check valve (11) below, and the border also is provided with annular groove (9.4) outside valve seat (9), and annular groove is provided with the cross-drilled hole (9.5) that runs through valve seat (9); Cross-drilled hole (9.5) is connected with the hole that fuel inlet ball check valve (10) is provided with, and inclined hole oil duct (9.1) connects hole and the plunger cavity (5.3) that fuel-displaced ball valve (11) is provided with.
3. high pressure co-rail system in-line arrangement oil feed pump according to claim 1; It is characterized in that: it also comprises the oil circuit group; The oil circuit group comprises first oil circuit, second oil circuit, the 3rd oil circuit, first oil circuit is arranged in order the oil-feed screw (26), oil transfer pump (17), pressure regulator valve (16), oil duct A (15.1), oil duct B (15.2), second annular groove (15.5) of the band cover of feed pump (28) of connection, with the pump housing (2) of oblique oil duct (2.4), bring passage A (24.1), channel B (24.2), second annular groove (15.5), plunger cavity (5.3), oil duct E (2.9), oil duct F (2.8), oil duct G (2.7), oil duct D (2.5), oil return screw (25), filter cleaner or fuel tank on the proportional electromagnetic valve (14) of electromagnetic oil valve opening (2.3), the oil duct C (2.1), oil duct D (2.5), plunger flange cover (24) on the pump housing (2) into; The second oil circuit oil duct (15.3), oil transfer pump, oil transfer pump are installed in the oil transportation pump seat (15); The 3rd oil circuit throttle orifice (15.4) pump housing (2) inner chamber.
4. high pressure co-rail system in-line arrangement oil feed pump according to claim 2 is characterized in that: the center of described camshaft (1) and plunger (5.1) center line are provided with throw of eccentric (27), and throw of eccentric is the 0-3 millimeter.
5. high pressure co-rail system in-line arrangement oil feed pump according to claim 2; It is characterized in that: it also comprises the ECU ECU of the output oil mass that is used to regulate oil pump and the solenoid valve (14) of adjustment oil-feed ratio, and described ECU ECU is positioned on the engine body; Described solenoid valve is arranged on the sidewall of pump housing left end or right-hand member.
6. high pressure co-rail system in-line arrangement oil feed pump according to claim 2 is characterized in that: camshaft and pump housing surface of contact also are provided with right thrust washer (18), left thrust washer (20) and adjustment pad (19) on the sidewall of the pump housing.
7. high pressure co-rail system in-line arrangement oil feed pump according to claim 2 is characterized in that: described inclined hole oil duct (9.1) symmetric arrangement 1-4 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200652191U CN202187850U (en) | 2011-03-14 | 2011-03-14 | In-line type oil supply pump of high pressure common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200652191U CN202187850U (en) | 2011-03-14 | 2011-03-14 | In-line type oil supply pump of high pressure common rail system |
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| Publication Number | Publication Date |
|---|---|
| CN202187850U true CN202187850U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200652191U Expired - Lifetime CN202187850U (en) | 2011-03-14 | 2011-03-14 | In-line type oil supply pump of high pressure common rail system |
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| CN (1) | CN202187850U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102829206A (en) * | 2012-09-13 | 2012-12-19 | 无锡正大轴承机械制造有限公司 | Piston of proportional electromagnetic valve with high voltage common rail parabola for diesel engine |
| CN103883452A (en) * | 2012-12-21 | 2014-06-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Oil suction valve component for high-pressure common rail pump |
| CN105332837A (en) * | 2015-11-04 | 2016-02-17 | 中国北方发动机研究所(天津) | Module type high-pressure common rail variable pump |
-
2011
- 2011-03-14 CN CN2011200652191U patent/CN202187850U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102829206A (en) * | 2012-09-13 | 2012-12-19 | 无锡正大轴承机械制造有限公司 | Piston of proportional electromagnetic valve with high voltage common rail parabola for diesel engine |
| CN103883452A (en) * | 2012-12-21 | 2014-06-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Oil suction valve component for high-pressure common rail pump |
| CN103883452B (en) * | 2012-12-21 | 2016-03-30 | 北京亚新科天纬油泵油嘴股份有限公司 | The oil sucting valve assembly of high voltage common rail pump |
| CN105332837A (en) * | 2015-11-04 | 2016-02-17 | 中国北方发动机研究所(天津) | Module type high-pressure common rail variable pump |
| CN105332837B (en) * | 2015-11-04 | 2018-01-19 | 中国北方发动机研究所(天津) | A kind of modular high-pressure common rail variable pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120411 Effective date of abandoning: 20140528 |
|
| RGAV | Abandon patent right to avoid regrant |