CN207004702U - Combined type electric-controlled co-rail high-pressure oil pump - Google Patents
Combined type electric-controlled co-rail high-pressure oil pump Download PDFInfo
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- CN207004702U CN207004702U CN201720991603.1U CN201720991603U CN207004702U CN 207004702 U CN207004702 U CN 207004702U CN 201720991603 U CN201720991603 U CN 201720991603U CN 207004702 U CN207004702 U CN 207004702U
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- plunger
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Abstract
It is in-line multi-cylinder formula high-pressure oil pump the utility model discloses a kind of combined type electric-controlled co-rail high-pressure oil pump, including the pump housing, pump cover, plunger matching parts, plunger spring, guide piston component, transmission component and proportioning valve；Plunger matching parts and guide piston component are installed in the mesopore of pump housing top, plunger matching parts includes plunger and plunger bushing, plunger bushing top offers the oil outlet chamber connected with the high-voltage oil cavity in plunger bushing and multiple oil suction chambers, delivery valve is installed in oil outlet chamber, inlet valve is fitted with multiple oil suction chambers, the oil outlet chamber connects through the high-voltage oil cavity on delivery valve and pump cover with high pressure fuel oil-out successively, pump housing top is provided with low-voltage fuel oil return opening and low-voltage fuel oil inlet, low-voltage fuel oil inlet is successively through proportioning valve, low-voltage fuel passage and inlet valve on pump cover connect with oil suction chamber；The transmission component is arranged in the camshaft hole of pump housing bottom.The utility model has the advantages that pressure is high, reliability is high, compact-sized.
Description
Technical field
The utility model belongs to diesel fuel injection system technical field, and in particular to a kind of combined type electric-controlled co-rail is high
Pressure oil pump.
Background technology
With electron controls technology rapid development and Abgasgesetz it is increasingly strict, high pressure common rail fuel injection system should
Transport and give birth to, high pressure common rail fuel injection system is as a kind of completely separate from each other by the generation of fuel-injection pressure and course of injection
Fuel system, it is typically made up of high-pressure oil pump, common rail pipe, fuel injector, sensor and ECU etc., wherein, the master of high-pressure oil pump
Function is wanted to provide fuel oil to common rail pipe at regular time and quantity, while ensures the stability of common rail pipe fuel pressure, therefore, hydraulic oil
Pump directly influences the performance of high pressure common rail fuel injection system.High pressure common rail fuel injection system to injection pressure requirements compared with
Height, required injection pressure have reached 160MPa, have been even up to 250MPa sometimes.And domestic high pressure common rail fuel injection system skill
Art is still immature, and existing high-pressure oil pump has the defects of reliability is relatively low, service life is shorter and volume is larger, therefore, also
Need further to be studied.
The content of the invention
The purpose of this utility model is to provide a kind of combined type electric-controlled co-rail high-pressure oil pump, to solve above-mentioned technology
Problem, it has, and pressure is high, compact-sized, high reliability.
Combined type electric-controlled co-rail high-pressure oil pump described in the utility model, is in-line multi-cylinder formula high-pressure oil pump, including the pump housing,
Be fixed on the pump cover at the top of the pump housing, the plunger matching parts in the pump housing, plunger spring, guide piston component, transmission component and
Proportioning valve on pump housing side；Plunger matching parts and the guide piston component is installed in the mesopore of pump housing top, institute
Stating plunger matching parts includes plunger and plunger bushing, and plunger bottom passes through plunger spring, and its lower end is fixedly connected with guide piston component；
The upper end of plunger spring is resisted against on the step surface of plunger bushing bottom, and its lower end is fitted in the upper surface of guide piston component；Institute
State plunger bushing top and offer the oil outlet chamber connected with the high-voltage oil cavity in plunger bushing and multiple oil suction chambers, installed in oil outlet chamber
There is delivery valve, inlet valve is fitted with multiple oil suction chambers, the oil outlet chamber is successively through the hydraulic oil on delivery valve and pump cover
Chamber connects with the high pressure fuel oil-out on pump cover, and pump housing top is provided with low-voltage fuel oil return opening and low-voltage fuel oil inlet,
Low-voltage fuel oil inlet connects through the low-voltage fuel passage on proportioning valve, pump cover and inlet valve with oil suction chamber successively；The transmission
Component is arranged in the camshaft hole of pump housing bottom.
Further, the transmission component includes camshaft and travelling gear, and camshaft is arranged on cam by sliding bearing
Multiple cams are provided with axis hole, on camshaft, each cam is relative with the guide piston component in a pump housing top mesopore
Should, and cam is compressed with the lower end of guide piston component and contacted；One end of camshaft is stretched out outside the pump housing, the travelling gear suit
In the end of camshaft, and carried out by woodruff key circumferentially positioned, be fixedly connected by nut with camshaft.
Further, pump housing bottom both ends are provided with end cap, and thrust ring is fixed with end cap inner surface, the thrust ring with
Step surface on camshaft compresses contact, and axial limiting is carried out to camshaft.
Further, set screw hole is offered on the pump housing lower outside face, tightening is installed in set screw hole
Screw, to carry out radial positioning to sliding bearing.
Further, guider screw hole is offered on the pump housing upper outside face, guiding is installed in guider screw hole
Screw, it is oriented to the up and down motion to guide piston component.
Further, the plunger spring uses double plunger spring, including big plunger spring and small plunger spring, small plunger bullet
Spring is located in big plunger spring.
Further, the mesopore inwall of the plunger bushing outer surface and plunger bushing is provided with combined seal ring.
Beneficial effect caused by the utility model：
1st, by setting double inlet valves in plunger bushing, the big flow use demand of high-power diesel engine is met, structure is tight
Gather, reduce the size of high-pressure oil pump, meet high-power diesel engine compact installation requirement.
2nd, high-pressure oil pump uses double plunger spring, ensure that the high rotating speed use demand of high-pressure oil pump.
3rd, the camshaft of high-pressure oil pump is supported by sliding bearing, and under lubricating condition, slidingsurface is separated by lubricating oil
Without occurring directly to contact, friction loss and surface abrasion are substantially reduced, sliding bearing stable working is reliable in addition, nothing is made an uproar
Sound.
4th, thrust ring is pressed between the end cap and camshaft in high-pressure oil pump, prevents camshaft axial float, further
Improve the reliability of high-pressure oil pump.
Brief description of the drawings
Fig. 1 is axonometric drawing of the present utility model；
Fig. 2 is structural representation of the present utility model；
In figure：1-pump cover, 2-delivery valve, 3-inlet valve, 4-plunger bushing, 5-plunger, 6-combined seal ring, 7-
Big plunger spring, 8-small plunger spring, 9-guide piston component, 10-sliding bearing, 11-thrust ring, 12-cam,
13-travelling gear, 14-woodruff key, 15-nut, 16-camshaft, 17-end cap, 18-pump housing, 19-holding screw,
20-guider screw, 21-proportioning valve, 22-high pressure fuel oil-out, 23-low-voltage fuel oil return opening, 24-low-voltage fuel enter
Hydraulic fluid port.
Embodiment
The utility model will be further described below in conjunction with the accompanying drawings.
Combined type electric-controlled co-rail high-pressure oil pump shown in Figure 1, is in-line four cylinder formula high-pressure oil pump, including the pump housing 18,
It is fixed on the pump cover 1 at the top of the pump housing 18, the plunger matching parts in the pump housing 18, plunger spring, guide piston component 9, transmission
Component and the proportioning valve 21 on the side of the pump housing 18.
The bottom of the pump housing 18 is cylindrical structure, and the centre bore of the bottom of the pump housing 18 is the cam for installing camshaft 16
Axis hole, low-voltage fuel oil return opening 23 and low-voltage fuel oil inlet 24 is provided with the upper outside face of the pump housing 18, in the pump housing 18
Upper parallel offers four mesopores with camshaft hole vertical connection, and four mesopores are by being opened in the drag reduction through hole of its inwall
(not shown) is communicated with each other, and plunger matching parts and the guide piston component 9 is installed in the mesopore on the top of the pump housing 18, is subtracted
Resistance through hole reduces resistance when guide piston component 9 moves up and down in mesopore, meets the high-revolving requirement of high-pressure oil pump.And
Low-voltage fuel oil return opening 23 and low-voltage fuel oil inlet 24 are provided with the upper outside face of the pump housing 18.
The plunger matching parts includes plunger 5 and plunger bushing 4, and the bottom of plunger 5 passes through the spring of plunger 5, and its lower end is lived with being oriented to
Plug assembly 9 is fixedly connected；The upper end of the spring of plunger 5 is resisted against on the step surface of the bottom of plunger bushing 4, and its lower end is fitted in guiding and lived
The upper surface of plug assembly 9；The top of plunger bushing 4 offers the oil outlet chamber connected with the high-voltage oil cavity in plunger bushing 4 and two
Oil suction chamber, delivery valve 2 is installed in oil outlet chamber, inlet valve 3 is fitted with two oil suction chambers, the oil outlet chamber passes through successively
High-voltage oil cavity on delivery valve 2 and pump cover 1 connects with the high pressure fuel oil-out 22 on pump cover 1.Low-voltage fuel oil inlet 24 according to
Secondary low-voltage fuel passage and inlet valve 3 through on proportioning valve 21, pump cover 1 connect with oil suction chamber, meet high-power diesel engine stream
Measure larger demand.
The transmission component includes camshaft 16 and travelling gear 13, and camshaft 16 is arranged on cam by sliding bearing 10
In axis hole, multiple cams 12 are provided with camshaft 16, the guide piston in each cam 12 and a top mesopore of the pump housing 18
Component 9 is corresponding, and cam 12 is compressed with the lower end of guide piston component 9 and contacted；One end of camshaft 16 is stretched out outside the pump housing 18,
The travelling gear 13 is sleeved on the end of camshaft 16, and carried out by woodruff key 14 it is circumferentially positioned, by nut 15 with
Camshaft 16 is fixedly connected.
In the present embodiment, end cap 17 is installed at the bottom both ends of the pump housing 18, thrust ring is fixed with the inner surface of end cap 17
11, the thrust ring 11 compresses with the step surface on camshaft 16 to be contacted, and axial limiting is carried out to camshaft 16.
And in the present embodiment, the plunger spring uses double plunger spring structure, including big plunger spring 7 and pillar
Spring 8 is filled in, small plunger spring 8 is located in big plunger spring 7, and the structure can ensure the high rotating speed use demand of high-pressure oil pump.
And in the present embodiment, in order to prevent fuel oil from flowing into the convex of pump housing bottom between plunger bushing 4 and mesopore inwall
In axle hole, the lubricating oil in camshaft hole is polluted, the outer surface of plunger bushing 4 is provided with combined seal ring 6, improves hydraulic oil
The reliability of pump.Meanwhile in order to improve the sealing of the mesopore intracavitary of plunger bushing 4, the mesopore inwall of plunger bushing 4 is provided with group
Close sealing ring 6.
As a kind of preferred scheme of the present embodiment, the hole of holding screw 19 is offered on the lower outside face of the pump housing 18,
Holding screw 19 is installed in the hole of holding screw 19, to carry out radial positioning to sliding bearing 10.
As another preferred scheme of the present embodiment, guider screw 20 is offered on the upper outside face of the pump housing 18
Hole, guider screw 20 is installed in the hole of guider screw 20, is oriented to the up and down motion to guide piston component 9.
Experiment proves that high-pressure oil pump described in the utility model meets that rated speed is 3000r/min, oil pump feed amount
For 30L/min, highest seal pressure 200MPa, the resistance to pressure pressure of highest reaches 240MPa requirement.
Operation principle of the present utility model：
The oil-filled stage：Delivery valve 2 is closed under back pressure effect, and inlet valve 3 is opened under input pressure effect, low-voltage fuel
Enter pump chamber from low-voltage fuel oil inlet 24 through the low-voltage fuel passage on proportioning valve 21 and pump cover 1, start oil-filled.Pass through regulation
The aperture of proportioning valve 21, and then oil-feed oil mass is controlled, meet different working condition requirements.
The pump oil stage：Camshaft 16 is rotated to drive guide piston component 9 to move upwards, the combustion of the compression pump intracavitary of plunger 5
Oil, the fuel pressure in pump chamber are gradually risen, and when pump chamber fuel pressure is more than input pressure, inlet valve 3 is closed, and works as pump chamber
When fuel pressure exceeds 2 spring force of back-pressure and delivery valve, delivery valve 2 is opened, and high pressure fuel is through the hydraulic oil on pump cover 1
Chamber is discharged from high pressure fuel oil-out 22.
Claims (7)
1. it is in-line multi-cylinder formula high-pressure oil pump a kind of combined type electric-controlled co-rail high-pressure oil pump, including the pump housing (18), is fixed on the pump housing
Pump cover (1), the plunger matching parts in the pump housing, plunger spring, guide piston component (9), transmission component and the installation at top
Proportioning valve (21) on pump housing side；It is characterized in that：Plunger matching parts and the guide piston component is installed on the pump housing
In portion's mesopore, the plunger matching parts includes plunger (5) and plunger bushing (4), and plunger bottom passes through plunger spring, and its lower end is with being oriented to
Piston component is fixedly connected；The upper end of plunger spring is resisted against on the step surface of plunger bushing bottom, and its lower end is fitted in guiding and lived
The upper surface of plug assembly；The plunger bushing top offers the oil outlet chamber connected with the high-voltage oil cavity in plunger bushing and multiple oil-feeds
Chamber, delivery valve (2) is installed in oil outlet chamber, inlet valve (3) is fitted with multiple oil suction chambers, the oil outlet chamber passes through successively
High-voltage oil cavity on delivery valve and pump cover connects with the high pressure fuel oil-out (22) on pump cover；Pump housing top is provided with low pressure combustion
Oily oil return opening (23) and low-voltage fuel oil inlet (24), low-voltage fuel oil inlet is successively through the low-voltage fuel on proportioning valve, pump cover
Passage and inlet valve connect with oil suction chamber；The transmission component is arranged in the camshaft hole of pump housing bottom.
2. combined type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：The transmission component includes convex
Wheel shaft (16) and travelling gear (13), camshaft are arranged in camshaft hole by sliding bearing (10), are provided with camshaft
Multiple cams (12), each cam is corresponding with the guide piston component in a pump housing top mesopore, and cam is lived with being oriented to
The lower end of plug assembly compresses contact；One end of camshaft is stretched out outside the pump housing, and the travelling gear is sleeved on the end of camshaft,
And it is circumferentially positioned by woodruff key (14) progress, it is fixedly connected by nut (15) with camshaft.
3. combined type electric-controlled co-rail high-pressure oil pump according to claim 2, it is characterised in that：Pacify at pump housing bottom both ends
Equipped with end cap (17), thrust ring (11) is fixed with end cap inner surface, the thrust ring is compressed with the step surface on camshaft and contacted,
Axial limiting is carried out to camshaft.
4. combined type electric-controlled co-rail high-pressure oil pump according to claim 2, it is characterised in that：The pump housing lower outside face
On offer set screw hole, holding screw (19) is installed in set screw hole, with to sliding bearing carry out radial positioning.
5. combined type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：The pump housing upper outside face
On offer guider screw hole, guider screw (20) is installed in guider screw hole, with the fortune up and down to guide piston component
It is dynamic to be oriented to.
6. combined type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：The plunger spring is using double
Plunger spring, including big plunger spring (7) and small plunger spring (8), small plunger spring are located in big plunger spring.
7. combined type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：The plunger bushing outer surface and
The mesopore inwall of plunger bushing is provided with combined seal ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720991603.1U CN207004702U (en) | 2017-08-09 | 2017-08-09 | Combined type electric-controlled co-rail high-pressure oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720991603.1U CN207004702U (en) | 2017-08-09 | 2017-08-09 | Combined type electric-controlled co-rail high-pressure oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207004702U true CN207004702U (en) | 2018-02-13 |
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ID=61458984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720991603.1U Active CN207004702U (en) | 2017-08-09 | 2017-08-09 | Combined type electric-controlled co-rail high-pressure oil pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN207004702U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005605A (en) * | 2019-05-22 | 2019-07-12 | 中国船舶重工集团公司第七0三研究所 | A kind of high-pressure high-flow fuel oil gear pump for Vessel personnel |
| WO2021088324A1 (en) * | 2019-11-08 | 2021-05-14 | 重庆红江机械有限责任公司 | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| GB2594544A (en) * | 2019-11-08 | 2021-11-03 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
-
2017
- 2017-08-09 CN CN201720991603.1U patent/CN207004702U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005605A (en) * | 2019-05-22 | 2019-07-12 | 中国船舶重工集团公司第七0三研究所 | A kind of high-pressure high-flow fuel oil gear pump for Vessel personnel |
| WO2021088324A1 (en) * | 2019-11-08 | 2021-05-14 | 重庆红江机械有限责任公司 | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| GB2594544A (en) * | 2019-11-08 | 2021-11-03 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump of marine low-speed machine |
| GB2594544B (en) * | 2019-11-08 | 2023-07-19 | Chongqing hongjiang machinery co ltd | Multi-cylinder combined high-pressure oil pump for marine low-speed engine |
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