CN205936934U - Engine injection pump - Google Patents
Engine injection pump Download PDFInfo
- Publication number
- CN205936934U CN205936934U CN201620963435.0U CN201620963435U CN205936934U CN 205936934 U CN205936934 U CN 205936934U CN 201620963435 U CN201620963435 U CN 201620963435U CN 205936934 U CN205936934 U CN 205936934U
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- valve
- oil
- valve plug
- seat
- oil duct
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Abstract
The utility model provides an engine injection pump, it includes the pump body, is equipped with oil inlet, oil -out on the pump body, still includes solenoid valve, plunger device, and the solenoid valve includes coil winding, disk seat, valve plug, valve rod, case, valve body and a reset spring, and the cross -section of valve plug is the U type, disk seat center corresponds and is equipped with the recess, in the recess is placed in to the valve plug, and is equipped with the 2nd reset spring between valve plug and the recess, laminate between the lateral wall of valve plug and the recess of disk seat, and the valve plug constitutes the cooperation of sliding in the recess, through setting the valve plug to the structure of cross -section for the U type, make its cover establish in the recess of disk seat, and constitute the cooperation of sliding with this recess, and the outer wall and the coaxial setting of the inner wall of recess of this valve plug, consequently, can guarantee valve plug coaxial sliding in this recess, the realization solenoid valve leads to, when disconnected, steady and the coaxial removal of valve plug, guarantee that the valve plug and the oil outlet of valve body can seal simultaneously, and can not lead to inclining the phenomenon to appear.
Description
Technical field
This utility model is related to a kind of injection pump, particularly to a kind of injection pump of engine.
Background technology
A kind of existing in-cylinder direct-jet high pressure injection pump, includes the pump housing, and the described pump housing is provided with oil-in, fuel-displaced
Mouthful, it is provided with pressure stabilizing cavity in the described pump housing, first connect oil duct, the second connection oil duct, described oil-in, the first connection oil duct
With pressure stabilizing cavity conducting, second connects oil duct and oil-out turns on, and described voltage stabilizing intracavity is provided with diaphragm unit, also include for
The electromagnetic valve controlling the first connection oil duct to be connected oil duct switching with second, the described pump housing is additionally provided with for closing in electromagnetic valve
When closing by second connect oil duct in fluid be pressed into oil-out plunger assembly, wherein, described electromagnetic valve include coil around
Group, valve seat, valve rod, valve element, diaphragm seal and the back-moving spring for the valve rod that resets, are provided with described coil windings and determine ferrum
Core, described diaphragm seal is set in valve rod lower end, and valve element is set in valve rod upper end, and valve element is linked with valve rod, fixed core position
In valve element upper end, valve seat be provided be connected with first oil duct conducting fuel feed hole is connected with second oil duct turn on oil outlet, enter
Be provided with connecting hole between oilhole, oil outlet, diaphragm seal be located at connecting hole lower section, described connecting hole inwall be provided with for
Diaphragm seal formed sealing sealing plane, during energising, fixed core produce captivation valve element is pulled up, thus carry ovable valve stem,
Diaphragm seal moves upwards, when diaphragm seal is sealed with sealing plane, closed electromagnetic valve, and during power-off, under action of reset spring, will
Valve rod resets.
But, the in-cylinder direct-jet high pressure fuel pump of this structure, diaphragm seal surface smoothness is had high demands so that it adds
Work bothers, and percent defective is high, and, when installing diaphragm seal with valve rod, need diaphragm seal can not produce inclination, it is installed will
Ask high, the moved in coaxial of diaphragm seal is also relatively difficult to ensure card simultaneously, affect the performance of whole injection pump.
Utility model content
In order to overcome above technical deficiency, this utility model provides a kind of injection pump of engine.
This utility model provides a kind of injection pump of engine, and it includes the pump housing, and the described pump housing is provided with oil-in, fuel-displaced
Mouthful, be provided with pressure stabilizing cavity in the described pump housing, first connect oil duct, the second connection oil duct, described oil-in, first connect oil duct with
Pressure stabilizing cavity turns on, and second connects oil duct is turned on oil-out, also includes for controlling the first connection oil duct to be connected oil with second
The electromagnetic valve of road switching, the described pump housing is additionally provided with for connecting the fluid pressure in oil duct by second in closed electromagnetic valve
Enter the plunger assembly of oil-out, described electromagnetic valve includes coil windings, valve seat, valve plug, valve rod, valve element, valve body and is used for multiple
The (the first back-moving spring of position valve rod, is provided with fixed core in described coil windings, valve rod front end is contacted with valve plug after passing through valve body,
Valve plug is linked with valve rod, and valve element is set in valve stem end, and valve element is linked with valve rod, and fixed core is located at valve element end,
Described (the first back-moving spring is arranged between fixed core and valve element, and the section of described valve plug is U-shaped, and described valve seat center corresponds to
It is provided with groove, described valve plug is placed in groove, and is provided with second back-moving spring between valve plug and groove, described valve seat is circumferentially with
Some the second oil outlets being connected oil duct conducting with second, valve body is provided with the first fuel feed hole being connected oil duct conducting with first,
With the first oil outlet of the second oil outlet conducting of valve seat, it is provided with connecting hole between the first fuel feed hole, the first oil outlet, described valve
Fit between the side wall of plug and the groove of valve seat, and described valve plug constitutes sliding cooperation in groove, described valve plug has to be blocked
The primary importance of the first oil outlet and the second position unclamping the first oil outlet.
The described pump housing is provided with fairlead, and described valve rod, valve element are respectively positioned on inside fairlead, described fairlead interior
Footpath is matched with the external diameter of valve element.
Described valve element end caves inward formation spring fixed seat, and described (the first back-moving spring is placed in this spring fixed seat
Interior, outside described valve element with fairlead inside interference fit.
First oil outlet of described valve body is circumferentially with cannelure, sets between described cannelure and the second oil outlet of valve seat
There is oil pocket, and turn on the first oil outlet in valve plug axial slip or be not turned on.
Described voltage stabilizing intracavity is provided with diaphragm unit, described diaphragm unit include upper pressure seat, down pressing seat, diaphragm body with
And filter screen, described diaphragm body is pressed between upper pressure seat, down pressing seat, and described filter screen is pressed on pressure stabilizing cavity through down pressing seat
Bottom.
Described plunger assembly includes plunger and the 3rd back-moving spring for reset plunger, described plunger at one end
Extend in the second connection oil duct, the other end extends to outside the pump housing, one end that plunger extends to outside the pump housing is provided with banking stop, the pump housing
It is provided with spring base, the 3rd back-moving spring is set on plunger, the 3rd back-moving spring two ends are supported with spring base, banking stop respectively
Touch.
Described plunger assembly is threadeded with the pump housing.
The exit of described second connection oil duct is provided with oil discharging device.
Described oil discharging device includes the fuel-displaced valve body being placed in the second connection oil duct, and described fuel-displaced body base is provided with fuel-displaced
Valve seat, is provided with spheroid in described delivery valve body, is provided with the 4th back-moving spring, described spheroid warp between described spheroid and delivery valve seat
4th back-moving spring is pressed on the second fuel feed hole lower end of fuel-displaced valve body.
Second fuel feed hole lower end inner wall of described fuel-displaced valve body is provided with the sealing surface matching with spheroid outer wall.
The beneficial effects of the utility model：It is U-shaped structure so as to be set in valve seat by valve plug is arranged to section
In groove, and constitute sliding cooperation with this groove, and the outer wall of this valve plug is coaxially disposed with the inwall of groove, therefore can ensure that
Valve plug coaxial sliding in this groove, when realizing electromagnetic valve switching, valve plug steadily and coaxially moves it is ensured that valve plug and valve body
Oil outlet can seal simultaneously, without leading to tilt phenomenon to occur.
Brief description
Fig. 1 is structural representation of the present utility model.
Fig. 2 is generalized section of the present utility model.
Fig. 3 is the generalized section of electromagnetic valve.
Fig. 4 is the structural representation of diaphragm unit.
Fig. 5 is the structural representation of oil discharging device.
Fig. 6 is the structural representation of plunger assembly.
Fig. 7 is the structural representation of valve body.
Fig. 8 is the structural representation of valve seat.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model embodiment is described further：
As illustrated, this utility model provide a kind of injection pump of engine, it includes the pump housing 1, the described pump housing 1 be provided with into
Hydraulic fluid port 2, oil-out 3, are provided with pressure stabilizing cavity 4, first and connect oil duct 5, second and connect oil duct 6, described oil-feed in the described pump housing 1
Mouth, the first connection oil duct and pressure stabilizing cavity conducting, second connects oil duct and oil-out conducting, also includes for control first connection
The electromagnetic valve that oil duct is connected oil duct switching with second, the described pump housing 1 is additionally provided with for when electromagnetic valve 7 cuts out by second
Connect the plunger assembly 9 that the fluid in oil duct is pressed into oil-out, described electromagnetic valve includes coil windings 71, valve seat, valve plug, valve
Bar, valve element, valve body 75 and the (the first back-moving spring for the valve rod that resets, are provided with fixed core 76, valve in described coil windings
Bar front end is contacted with valve plug after passing through valve body, and valve plug is linked with valve rod, and valve element is set in valve stem end, and valve element is joined with valve rod
Dynamic cooperation, fixed core is located at valve element end, is provided with (the first back-moving spring, the section of described valve plug is U between fixed core and valve element
Type, described valve seat center is correspondingly provided with groove, and described valve plug is placed in groove, and is provided with the second reset bullet between valve plug and groove
Spring, described valve seat is circumferentially with some the second oil outlets being connected oil duct conducting with second, and valve body is provided with and is connected oil with first
First fuel feed hole 753 of road conducting, the first oil outlet with the second oil outlet conducting of valve seat, the first fuel feed hole, first fuel-displaced
It is provided with connecting hole between hole, fits between the side wall of described valve plug and the groove of valve seat, and described valve plug constitutes cunning in groove
Move cooperation, described valve plug has the primary importance blocking the first oil outlet and the second position unclamping the first oil outlet.
Because valve seat 77 is provided with groove 771, and the diameter of this groove is adapted with the diameter of valve plug, therefore passes through valve plug
78 are placed in the grooves of valve seat it is ensured that axiality, and arrange second back-moving spring 79 between valve plug and valve seat, by the
Two back-moving springs make valve plug contact with the first oil outlet of valve body, and the front end of valve rod is then placed in the surface of valve plug, in electromagnetic valve
In the case of switching, valve rod meeting top pressure valve plug, so that the first oil outlet 752 and the second oil outlet turn on, valve plug is placed in valve
Seat is interior and can straight skidding coordinate, because the circumference of the groove of valve seat is spacing, so that the steady sliding of this valve plug is not in
Skew, that is, ensure what this valve plug was contacted when being treated as with the week side of boss of the first oil outlet, without the situation that local first contacts.
The described pump housing is provided with fairlead 72, and described valve rod 74, valve element are respectively positioned on inside fairlead, described fairlead
Internal diameter match with the external diameter of valve element.The fairlead of setting, so that valve element is in lifting, will not produce position skew, from
And make to produce position skew during valve rod lifting it is ensured that the open and close of electromagnetic valve is more stable, precision is higher.
Described valve element 73 end caves inward formation spring fixed seat, and described (the first back-moving spring is placed in this spring fixed seat
Interior, interference fit inside described valve element 73 outside and fairlead.
There is gap, described spring fixed seat is fixedly connected with valve rod, described between described spring fixed seat and fixed core
Form groove, it can drive valve rod axial slip under the drive of electromagnetic valve between fairlead and fixed core, and valve rod and spring
Fixed seat is fixedly connected, you can ensure both linkages, and make electromagnetic valve component structure compacter.Spring fixed seat
End arranges circular hole, is used for fixing spring so that spring is placed and coil windings and spring fixed seat between, and can guarantee that spring
It is arranged concentrically with valve rod and do not shift.
First oil outlet of described valve body is circumferentially with cannelure 751, the second oil outlet of described cannelure and valve seat it
Between be provided with out oil pocket, and in valve plug axial slip with first oil outlet conducting or be not turned on, the design of cannelure.
It is provided with diaphragm unit 8, described diaphragm unit 8 includes upper pressure seat 81, down pressing seat 82, film in described pressure stabilizing cavity 4
Piece body 83 and filter screen 84, described diaphragm body 83 is pressed between upper pressure seat 81, down pressing seat 82, under described filter screen warp
Wedge is pressed on the bottom of pressure stabilizing cavity, and the filter screen of setting can prevent the impurity particle in fluid from entering electromagnetic valve, in electromotor,
Impact electromagnetic valve, the service behaviour of electromotor；This diaphragm unit 8 mounting means, structure is simple.
Described plunger assembly 9 includes plunger 92 and the 3rd back-moving spring 93 for reset plunger, described post
Fill in 92 one end and extend in the second connection oil duct, the other end extends to outside the pump housing 1, and one end that plunger 92 extends to outside the pump housing 1 sets
Limited bit slice 91, the pump housing is provided with spring base 94, and the 3rd back-moving spring 93 is set on plunger 92, and the 3rd back-moving spring two ends are divided
Do not conflict with spring base, banking stop.
Described plunger assembly 9 is threadeded with the pump housing 1.Threaded between described plunger assembly 9 and the pump housing 1, more in the past
Direct insertion plunger assembly, it is more firmly mounted, simultaneously adopt threaded, dismounting is fixed conveniently, simultaneously in its screw thread
Upper and lower ends arrange sealing ring it is ensured that sealing between plunger assembly and the pump housing.
The exit of described second connection oil duct is provided with oil discharging device 10.Described oil discharging device includes being placed in the second connection oil
Fuel-displaced valve body 101 in road, described fuel-displaced valve body 101 bottom is provided with delivery valve seat 102, is provided with ball in described fuel-displaced valve body 101
Body 105, is provided with the 4th back-moving spring 104 between described spheroid and delivery valve seat, described spheroid is pressed on through the 4th back-moving spring
Second fuel feed hole lower end of fuel-displaced valve body.Second fuel feed hole lower end inner wall of described fuel-displaced valve body is provided with and spheroid outer wall phase
The sealing surface joined.
The section of described delivery valve seat is T-shaped, and it includes circumference and has the disk of oil outlet and be arranged on disc centre
The support column 103 for spheroid is carried out with axial limiting, described support column insertion arranges oil outlet, and described elastic component is arranged on
Outside support column, at described support column and spheroid cooperation, conical recess is set, and this conical recess is adapted with spheroid, described go out
Fuel tap body includes sealed volume and installs cavity volume, and described spheroid is placed in sealed volume, and described support column is placed in installation cavity volume,
The diameter of described sealed volume is less than the diameter installing cavity volume.When spheroid is washed open by impulsive force, its maximum washes dynamics open, also
It is that this maximum position ensure that spheroid great majority are in sealed volume, does not fall out by ball impact to support column, and
Sealed volume is via design, then ensure that spheroid will not occur off normal, also do not fall out, and plays axial limiting effect.
Embodiment is not construed as to restriction of the present utility model, any based on spirit improvements introduced of the present utility model,
All should be within protection domain of the present utility model.
Claims (10)
1. a kind of injection pump of engine, it includes the pump housing, and the described pump housing is provided with oil-in, oil-out, is provided with the described pump housing
Pressure stabilizing cavity, first connect oil duct, the second connection oil duct, described oil-in, first connect oil duct and turn on pressure stabilizing cavity, second connects
Connect oil duct to turn on oil-out, also include the electromagnetic valve for controlling the first connection oil duct to be connected oil duct switching with second,
The plunger dress being pressed into oil-out for connecting the fluid in oil duct by second in closed electromagnetic valve is additionally provided with the described pump housing
Put it is characterised in that：Described electromagnetic valve includes coil windings, valve seat, valve plug, valve rod, valve element, valve body and is used for the valve rod that resets
(the first back-moving spring, be provided with fixed core in described coil windings, valve rod front end pass through valve body after contact with valve plug, valve plug and
Valve rod is linked, and valve element is set in valve stem end, and valve element is linked with valve rod, and fixed core is located at valve element end, described
(the first back-moving spring is arranged between fixed core and valve element, and the section of described valve plug is U-shaped, and described valve seat center is correspondingly provided with recessed
Groove, described valve plug is placed in groove, and is provided with second back-moving spring between valve plug and groove, described valve seat be circumferentially with some with
Second the second oil outlet connecting oil duct conducting, valve body is provided with the first fuel feed hole being connected oil duct conducting with first, with valve seat
Second oil outlet conducting the first oil outlet, be provided with connecting hole, the side of described valve plug between the first fuel feed hole, the first oil outlet
Fit between wall and the groove of valve seat, and described valve plug constitutes sliding cooperation in groove, described valve plug has to be blocked first and go out
The primary importance of oilhole and the second position unclamping the first oil outlet.
2. injection pump of engine according to claim 1 is it is characterised in that the described pump housing is provided with fairlead, described
Valve rod, valve element are respectively positioned on inside fairlead, and the described internal diameter of fairlead is matched with the external diameter of valve element.
3. injection pump of engine according to claim 2 it is characterised in that described valve element end caves inward formation spring
Fixed seat, described (the first back-moving spring is placed in this spring fixed seat, outside described valve element with fairlead inside interference fit.
4. injection pump of engine according to claim 1 is it is characterised in that the first oil outlet of described valve body is circumferentially with
Cannelure, is provided with out oil pocket between described cannelure and the second oil outlet of valve seat, and goes out with first in valve plug axial slip
Oilhole turns on or is not turned on.
5. injection pump of engine according to claim 1 is it is characterised in that described voltage stabilizing intracavity is provided with diaphragm unit, institute
The diaphragm unit stated includes upper pressure seat, down pressing seat, diaphragm body and filter screen, described diaphragm body be pressed on upper pressure seat,
Between down pressing seat, described filter screen is pressed on the bottom of pressure stabilizing cavity through down pressing seat.
6. injection pump of engine according to claim 1 it is characterised in that described plunger assembly include plunger and
For the 3rd back-moving spring of reset plunger, described plunger at one end extends in the second connection oil duct, and the other end extends to pump
In vitro, one end that plunger extends to outside the pump housing is provided with banking stop, and the pump housing is provided with spring base, and the 3rd back-moving spring is set in plunger
On, conflicted with spring base, banking stop respectively in the 3rd back-moving spring two ends.
7. the injection pump of engine according to claim 1 or 6 is it is characterised in that described plunger assembly is connected with pump housing screw thread
Connect.
8. injection pump of engine according to claim 1 is it is characterised in that the exit of described second connection oil duct is provided with
Oil discharging device.
9. injection pump of engine according to claim 8 is it is characterised in that described oil discharging device includes being placed in the second connection
Fuel-displaced valve body in oil duct, described fuel-displaced body base is provided with delivery valve seat, is provided with spheroid, described spheroid in described delivery valve body
It is provided with the 4th back-moving spring and delivery valve seat between, described spheroid is pressed on the second oil-feed of fuel-displaced valve body through the 4th back-moving spring
Hole lower end.
10. injection pump of engine according to claim 9 is it is characterised in that under the second fuel feed hole of described fuel-displaced valve body
End inwall is provided with the sealing surface matching with spheroid outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963435.0U CN205936934U (en) | 2016-08-29 | 2016-08-29 | Engine injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620963435.0U CN205936934U (en) | 2016-08-29 | 2016-08-29 | Engine injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205936934U true CN205936934U (en) | 2017-02-08 |
Family
ID=57954310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620963435.0U Active CN205936934U (en) | 2016-08-29 | 2016-08-29 | Engine injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205936934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150811A (en) * | 2016-08-29 | 2016-11-23 | 浙江巴腾动力系统有限公司 | Injection pump of engine |
| CN109519312A (en) * | 2017-09-20 | 2019-03-26 | 现代凯菲克株式会社 | High pressure fuel pump |
| CN110832187A (en) * | 2017-07-14 | 2020-02-21 | 日立汽车系统株式会社 | High-pressure fuel pump |
-
2016
- 2016-08-29 CN CN201620963435.0U patent/CN205936934U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150811A (en) * | 2016-08-29 | 2016-11-23 | 浙江巴腾动力系统有限公司 | Injection pump of engine |
| CN110832187A (en) * | 2017-07-14 | 2020-02-21 | 日立汽车系统株式会社 | High-pressure fuel pump |
| CN110832187B (en) * | 2017-07-14 | 2021-09-21 | 日立安斯泰莫株式会社 | High-pressure fuel pump |
| CN109519312A (en) * | 2017-09-20 | 2019-03-26 | 现代凯菲克株式会社 | High pressure fuel pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |