CN206722945U - Monomer-type electric-controlled co-rail high-pressure oil pump - Google Patents
Monomer-type electric-controlled co-rail high-pressure oil pump Download PDFInfo
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- CN206722945U CN206722945U CN201720533926.6U CN201720533926U CN206722945U CN 206722945 U CN206722945 U CN 206722945U CN 201720533926 U CN201720533926 U CN 201720533926U CN 206722945 U CN206722945 U CN 206722945U
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- oil
- plunger
- feed
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- pump housing
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Abstract
The utility model discloses a kind of monomer-type electric-controlled co-rail high-pressure oil pump, including the pump housing, plunger matching parts, plunger spring, guide piston component, transmission component and oil-feed proportioning valve, plunger matching parts and guide piston component are installed in the mesopore of the pump housing, and plunger matching parts includes plunger and plunger bushing；Oil out port, oil outlet valve component and oil-feed valve module are from top to bottom sequentially installed with the mesopore of plunger bushing, oil out port is screwed in the mesopore top of plunger bushing by screw thread, oil outlet valve component and oil-feed valve module are pressed in the mesopore of plunger bushing.The utility model can improve the stability and reliability of common-rail high-pressure pump, and compact-sized, and assembling is simple and convenient.
Description
Technical field
It the utility model is related to diesel engine technologies field, and in particular to a kind of monomer-type electric-controlled co-rail 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.Mainly there are Japan electric coating, German Bosch and U.S. in the world at present
The companies such as state's Ford are in research and development and produce high pressure co-rail system, and the pressure of its high pressure common rail fuel injection system produced can reach
To 220MPa.And domestic high pressure common rail fuel injection system technology is still immature, existing high-pressure oil pump existence and stability is poor,
Service life is shorter and the defects of volume is larger, therefore, there is a need to further improvement.
The content of the invention
The purpose of this utility model is to provide a kind of monomer-type electric-controlled co-rail high-pressure oil pump, to solve above-mentioned technology
Problem.
Monomer-type electric-controlled co-rail high-pressure oil pump described in the utility model, including the pump housing, plunger matching parts, plunger spring, lead
To piston component, transmission component and oil-feed proportioning valve, plunger matching parts and the guide piston component is installed in the mesopore of the pump housing
Interior, plunger matching parts includes plunger and plunger bushing；Oil out port, delivery valve are from top to bottom sequentially installed with the mesopore of plunger bushing
Component and oil-feed valve module, oil out port are screwed in the mesopore top of plunger bushing by screw thread, by oil outlet valve component and inlet valve
Component is pressed in the mesopore of plunger bushing；The oil outlet valve component includes fuel-displaced valve body, delivery valve seat and oil outlet valve spring, fuel-displaced
The mesopore top conical surface seal of valve body and delivery valve seat, the upper end of oil outlet valve spring are fitted in the bottom mesopore of oil out port,
Its lower end is pressed on the upper end of fuel-displaced valve body；Oil-feed valve module includes steel ball, oil-feed valve seat and oil-feed valve spring, steel ball with
The mesopore top ball face sealing of oil-feed valve seat, the inlet valve pressure mounting of the spring is between fuel-displaced valve body and steel ball, and in inlet valve
High-pressure oil duct is offered on seat, the high-pressure oil duct connects the high pressure chest of both sides above and below oil-feed valve seat, is also opened on oil-feed valve seat
Provided with the oil-feed oil duct connected with its mesopore, the oil-feed interface for being arranged on pump housing side passes through oil-feed proportioning valve and the oil-feed oil duct
Connection.
Further, the transmission component includes cam and camshaft, and camshaft is arranged in the camshaft hole of pump housing bottom,
Its both ends is supported by taper roll bearing, and be provided at both ends with bearing (ball) cover in pump housing bottom is fitted in pump by taper roll bearing
In vivo.
Further, the camshaft outer surface has been disposed radially three groups of cams, and the molded line of the cam is double harmonic curves.
Further, it is provided with backbone sealing ring between the bearing (ball) cover and camshaft.
Further, the lubricating oil interface connected with the mesopore of the pump housing and camshaft hole is provided with the outside of the pump housing, to divide
It is other that forced feed lubrication and cooling are carried out to guide piston component and transmission component.
Further, the plunger bushing top is provided with omoplate, and plunger bushing is by omoplate suspension installed in pump housing top
In mesopore.
Further, the plunger spring lower end is pressed on guide piston component, and the other end is supported by spring holder and the pump housing
Press contacts.
Further, the pump housing bottom offers the fabrication hole being put into for being directed to piston component in the pump housing, the technique
Hole is blocked by vexed plug, is provided with a baffle plate beyond the Great Wall vexed, baffle plate is fixedly connected with vexed plug by holding screw.
Beneficial effect caused by the utility model：
1st, by taking on fuel tap and inlet valve in the mesopore internal pressure of plunger bushing, delivery valve goes out entering for oil pressure and inlet valve
Oil pressure is adjustable, and delivery valve uses conical surface sealed, and inlet valve uses sphere sealed, it is possible to increase common-rail high-pressure pump
Stability and reliability, and compact-sized, assembling is simple and convenient.
2nd, by being disposed radially three groups of cams in the camshaft outer surface of transmission component, camshaft often rotates a circle,
Common rail high-pressure oil pump provides pump oil three times, in the case where fuel delivery is certain, accordingly reduces the size of transmission component, meets altogether
The compact-sized design requirement of rail high-pressure oil pump.
3rd, by setting omoplate, mesopore of the plunger bushing by omoplate suspension installed in pump housing top on plunger bushing top
It is interior, because between plunger bushing and the pump housing, without sealing surface, the difficulty of processing of plunger bushing can be reduced, and then reduce its production cost.
Brief description of the drawings
Fig. 1 is shaft side figure of the present utility model；
Fig. 2 is internal structure profile of the present utility model；
Fig. 3 is the profile of oil-feed valve seat in the utility model；
Fig. 4 is the profile of the utility model convexity wheel shaft and cam；
Wherein, 1-oil out port, 2-plunger bushing, 3-oil outlet valve spring, 4-fuel-displaced valve body, 5-delivery valve seat, 6-
Oil-feed valve spring, 7-steel ball, 8-oil-feed valve seat, 9-spring holder, 10-plunger spring, 11-pump housing, 12-guide piston group
Part, 13-backbone sealing ring, 14-camshaft, 15-taper roll bearing, 16-bearing (ball) cover, 17-holding screw, 18-
Vexed plug, 19-baffle plate, 20-cam, 21-plunger, 22-lubricating oil interface, 23-oil-feed proportioning valve, 24-oil-feed interface；
81-oil-feed oil duct, 82-high-pressure oil duct.
Embodiment
The utility model will be further described below in conjunction with the accompanying drawings.
Referring to the monomer-type electric-controlled co-rail high-pressure oil pump shown in Fig. 1 and Fig. 2, including the pump housing 11, plunger matching parts, plunger spring
10th, guide piston component 12, transmission component and oil-feed proportioning valve 23.
Plunger matching parts and the guide piston component 12 is installed in the mesopore of the pump housing 11.Plunger matching parts includes plunger 21
With plunger bushing 2, the lower end of plunger 21 is connected with guide piston component 12, and the plunger spring 10 is located at plunger bushing 2 and guide piston
Between component 12, its lower end is pressed on the upper surface of guide piston component 12, and its upper end is compressed by spring holder 9 and the pump housing 11
Contact, to reduce impact when high-pressure oil pump works to plunger bushing 2, improve the service life of plunger bushing；In the mesopore of plunger bushing 2
Oil out port 1, oil outlet valve component and oil-feed valve module are inside from top to bottom sequentially installed with, oil out port 1 is screwed in by screw thread
The mesopore top of plunger bushing 2, oil outlet valve component and oil-feed valve module are pressed in the mesopore of plunger bushing 2.The fuel-displaced valve group
Part includes fuel-displaced valve body 4, delivery valve seat 5 and oil outlet valve spring 3, and the mesopore top conical surface of fuel-displaced valve body 4 and delivery valve seat 5 is close
Envelope, the upper end of oil outlet valve spring 3 are fitted in the bottom mesopore of oil out port 1, and its lower end is pressed on the upper end of fuel-displaced valve body 4
On；Oil-feed valve module includes steel ball 7, oil-feed valve seat 8 and oil-feed valve spring 6, the mesopore top sphere of steel ball 7 and oil-feed valve seat 8
Sealing, the oil-feed valve spring 6 is fitted between fuel-displaced valve body 4 and steel ball 7, and offers high-pressure oil duct on oil-feed valve seat 8
82, the high-pressure oil duct 82 connects the high pressure chest of oil-feed valve seat both sides about 8, is further opened with oil-feed valve seat 8 and its mesopore
The oil-feed oil duct 81 of connection, the oil-feed interface 24 for being arranged on the side of the pump housing 11 are connected by oil-feed proportioning valve 23 and the oil-feed oil duct
It is logical.
In the present embodiment, the transmission component includes cam 20 and camshaft 14, and camshaft 14 is arranged under the pump housing 11
In the hole of camshaft 14 in portion, its both ends is supported by taper roll bearing 15, and bearing (ball) cover is provided at both ends with the bottom of the pump housing 11
16 are fitted in taper roll bearing 15 in the pump housing 11.
As a kind of preferred scheme of the present embodiment, the outer surface of camshaft 14 has radially been wholely set three groups of cams
20, the molded line of the cam 20 is double harmonic curves, camshaft 14 for each revolution, the guide piston component 12 with camshaft 14
Cam 20 contact three times, and then enable high-pressure oil pump to provide pump oil three times, improve the operating efficiency of the high-pressure oil pump,
And in the case where fuel delivery is certain, the size of transmission component is accordingly reduced, meet that common rail high-pressure oil pump is compact-sized to be set
Meter requires.
In the present embodiment, the outside of the pump housing 11 is provided with the lubrication connected with the mesopore of the pump housing 11 and the hole of camshaft 14
Oily interface 22, to carry out forced feed lubrication and cooling to guide piston component 12 and transmission component respectively.
And in the present embodiment, backbone sealing ring 13 is provided between the bearing (ball) cover 16 and camshaft 14, can
Enough prevent the dust impurity etc. in the external world from entering in the pump housing 11, and can enough prevents oil seepage, and sealing property is preferable.
As another preferred scheme of the present embodiment, the bottom of the pump housing 11 is offered for being directed to piston component 12
The fabrication hole being put into the pump housing 11, the fabrication hole are blocked by vexed plug 18, and a baffle plate 19, the He of baffle plate 19 are provided with outside vexed plug 18
Vexed plug 18 is fixedly connected by holding screw 17.
As another preferred scheme of the present embodiment, the top of plunger bushing 2 is provided with omoplate, and plunger bushing 2 passes through this
Omoplate suspension is in the mesopore on the top of the pump housing 11.Because that can be dropped without sealing surface, said structure between plunger bushing 2 and the pump housing 11
The difficulty of processing of low plunger bushing 2, and then reduce its production cost.
Show that the rated speed of high-pressure oil pump described in the utility model is 900r/min, and charge oil pressure is more than through experiment
180Mpa, fuel delivery per cycle can reach 1700mm3/c。
The operation principle of the high-pressure oil pump is as follows：
The oil-filled stage：Fuel-displaced valve body 4 is sealed under back pressure effect with delivery valve seat 5, and steel ball 7 is beaten under input pressure effect
Open, low-voltage fuel enters pump chamber from oil-feed interface 24 through oil-feed proportioning valve 23, starts oil-filled.By adjusting oil-feed proportioning valve 23
Aperture, and then oil-feed oil mass is controlled, meet different working condition requirements.
The pump oil stage：Camshaft 14 is rotated to drive guide piston component 12 to move upwards, the compression pump intracavitary of plunger 21
Fuel oil, the fuel pressure in pump chamber gradually rises, when pump chamber fuel pressure is more than input pressure, ball valve and oil-feed valve seat 8
Sealing, when pump chamber fuel pressure exceeds 3 power of back-pressure and oil outlet valve spring, fuel-displaced valve body 4 is opened, and high pressure fuel is from going out
Oily interface 1 is discharged.
Claims (8)
1. monomer-type electric-controlled co-rail high-pressure oil pump, including the pump housing (11), plunger matching parts, plunger spring (10), guide piston component
(12), transmission component and oil-feed proportioning valve (23), plunger matching parts and the guide piston component are installed in the mesopore of the pump housing,
Plunger matching parts includes plunger (21) and plunger bushing (2)；It is characterized in that：From top to bottom it is sequentially installed with the mesopore of plunger bushing
Oil out port (1), oil outlet valve component and oil-feed valve module, oil out port are screwed in the mesopore top of plunger bushing by screw thread, will
Oil outlet valve component and oil-feed valve module are pressed in the mesopore of plunger bushing；The oil outlet valve component includes fuel-displaced valve body (4), fuel-displaced
Valve seat (5) and oil outlet valve spring (3), the mesopore top conical surface seal of fuel-displaced valve body and delivery valve seat, the upper end of oil outlet valve spring
It is fitted in the bottom mesopore of oil out port, its lower end is pressed on the upper end of fuel-displaced valve body；The oil-feed valve module includes
Steel ball (7), oil-feed valve seat (8) and oil-feed valve spring (6), the mesopore top ball face sealing of steel ball and oil-feed valve seat, inlet valve bullet
Spring (6) is fitted between fuel-displaced valve body and steel ball, and high-pressure oil duct (82) is offered on oil-feed valve seat, and the high-pressure oil duct will enter
The high-voltage oil cavity connection of both sides, is further opened with the oil-feed oil duct (81) connected with its mesopore on oil-feed valve seat above and below fuel tap seat,
The oil-feed interface (24) for being arranged on pump housing side is connected by oil-feed proportioning valve with the oil-feed oil duct.
2. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：The transmission component includes convex
(20) and camshaft (14) are taken turns, camshaft is arranged in the camshaft hole of pump housing bottom, and its both ends passes through taper roll bearing
(15) support, bearing (ball) cover (16) is provided at both ends with the pump housing bottom taper roll bearing is fitted in the pump housing.
3. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 2, it is characterised in that：Camshaft (14) appearance
Face has been disposed radially three groups of cams (20), and the molded line of the cam is double harmonic curves.
4. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 2, it is characterised in that：The bearing (ball) cover (16) with
Backbone sealing ring (13) is provided between camshaft.
5. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 2, it is characterised in that：Set on the outside of the pump housing (11)
The lubricating oil interface (22) connected with pump housing mesopore and camshaft hole is equipped with, to enter respectively to guide piston component and transmission component
Row forced feed lubrication and cooling.
6. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：Plunger bushing (2) top
Omoplate is provided with, plunger bushing is by omoplate suspension in the mesopore on pump housing top.
7. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：Under the plunger spring (10)
End is pressed on guide piston component, and the other end is compressed with the pump housing by spring holder (9) and contacted.
8. monomer-type electric-controlled co-rail high-pressure oil pump according to claim 1, it is characterised in that：Open the pump housing (11) bottom
Provided with the fabrication hole being put into for being directed to piston component in the pump housing, the fabrication hole is blocked by vexed plug (18), is set beyond the Great Wall vexed
A baffle plate (19) is equipped with, baffle plate is fixedly connected with vexed plug by holding screw (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720533926.6U CN206722945U (en) | 2017-05-15 | 2017-05-15 | Monomer-type electric-controlled co-rail high-pressure oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720533926.6U CN206722945U (en) | 2017-05-15 | 2017-05-15 | Monomer-type electric-controlled co-rail high-pressure oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206722945U true CN206722945U (en) | 2017-12-08 |
Family
ID=60510098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720533926.6U Active CN206722945U (en) | 2017-05-15 | 2017-05-15 | Monomer-type electric-controlled co-rail high-pressure oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206722945U (en) |
-
2017
- 2017-05-15 CN CN201720533926.6U patent/CN206722945U/en active Active
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