CN207315562U - The spill valve of injection pump - Google Patents
The spill valve of injection pump Download PDFInfo
- Publication number
- CN207315562U CN207315562U CN201721401438.6U CN201721401438U CN207315562U CN 207315562 U CN207315562 U CN 207315562U CN 201721401438 U CN201721401438 U CN 201721401438U CN 207315562 U CN207315562 U CN 207315562U
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- CN
- China
- Prior art keywords
- oil
- spool
- valve body
- oil outlet
- spill valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of spill valve of injection pump, which includes：Valve body, it is connected with the pump housing, and valve body is arranged at the top of low pressure oil pocket, and valve body lower portion is provided with two the first oil outlets being mutually communicated, and the first oil outlet is connected with fuel tank；Spool, it is installed on the inside of valve body, and can be moved up and down in the inside of valve body, and spool includes exhausting-gas hole and two the second oil outlets being mutually communicated；And sealing device.Wherein, when spool is located at first position, exhausting-gas hole is connected with the first oil outlet, for discharging the gas of low pressure oil intracavitary；When spool is located at the second place, exhausting-gas hole and the second oil outlet are closed by the inner wall of valve body；When spool is located at the third place, the second oil outlet is connected with the first oil outlet, for draining excessive fuel oil.The spill valve of the utility model is rational in infrastructure, and bleeding is simple and thorough, and good exhaust effect, greatly reduces cost of labor, improves efficiency.
Description
Technical field
The utility model belongs to engine fuel oil system technical field, is related to a kind of spill valve of injection pump.
Background technology
Currently, the spill valve being matched with diesel injection pump is not provided with exhausting-gas hole, so as to cause engine in empty oil
Case replaces fuel system emptying difficulty after fuel filter.In order to tackle this emptying difficulty, the method for generally use
Mainly there are two kinds：
A kind of is on the pressure side (downstream of oil transfer pump) piece evacuated tube of design arrangement in engine fuel oil system, so that will
Air in system is back in fuel tank by evacuated tube.
This arrangement there are the problem of be that engine needs extra increase design oil pipe, part is various, and connection and arrangement are multiple
It is miscellaneous, and the latus rectum of evacuated tube needs to match well with engine fuel oil system flow just make engine in the process of startup
Middle pump chamber oil pressure is established rapidly, to reach opening for high-pressure pump inner plunger inlet valve (the plunger inlet valve inside common rail system oil pump)
Open the requirement of pressure.However, this method cannot still exclude the air inside the pump chamber of oil pump.
Another kind is not design evacuated tube, and takes the air in the method removal system of segmentation manual purge.
Although this method avoids the problem of design evacuated tube, but need to dismantle pre-flock, the exhaust above refined filtration successively
Plug screw, and dismantle oil pump spill valve and carry out manual pump oil emptying, operation is very cumbersome, and labor intensity is big.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the utility model, and
It is not construed as recognizing or implies that the information structure has been existing well known to persons skilled in the art in any form
Technology.
Utility model content
The purpose of this utility model is to provide a kind of spill valve of injection pump, thus overcome in the prior art spill valve it is equal
Exhausting-gas hole is not provided with, gas emptying effect is poor, is vented the problem of complicated, cumbersome.
To achieve the above object, the utility model provides a kind of spill valve of injection pump, the injection pump include the pump housing and
Low pressure oil pocket, injection pump are connected by oil return pipe with fuel tank, and spill valve is used to the fuel oil in low pressure chamber being maintained at certain
In pressure limit, which includes：Valve body, it is connected with the pump housing, and valve body is arranged at the top of low pressure oil pocket, and valve body includes
The valve body lower portion of body top and cylinder, valve body lower portion are provided with two the first oil outlets being mutually communicated, the first oil outlet
It is connected with fuel tank；Spool, it is installed on the inside of valve body, and can be moved up and down in the inside of valve body, and spool includes exhaust
Hole and two the second oil outlets being mutually communicated；And sealing device；Wherein, when spool is located at first position, exhausting-gas hole with
First oil outlet is connected, for discharging the gas in fuel system；When spool is located at the second place, exhausting-gas hole and second goes out
Oilhole is closed；When spool is located at the third place, the second oil outlet is connected with the first oil outlet, excessive for that will drain
Fuel oil.
Preferably, in above-mentioned technical proposal, spool further includes drain pan, which is arranged on the outer wall of spool, and
Positioned at the top of the second oil outlet of the offside of exhausting-gas hole, for the fuel oil accumulated at the top of spool between ball sealer to be drained
To the outside of spill valve.
Preferably, in above-mentioned technical proposal, when spool is located at first position, the second place and the third place respectively, let out
Oil groove keeps being connected with the first oil outlet.
Preferably, in above-mentioned technical proposal, the aperture of exhausting-gas hole is less than the aperture of the first oil outlet.
Preferably, in above-mentioned technical proposal, the aperture of the second oil outlet is less than or equal to the aperture of the first oil outlet.
Preferably, in above-mentioned technical proposal, body top is outer-hexagonal shape, tightening and dismantling for valve body.
Preferably, in above-mentioned technical proposal, sealing device includes spring and ball sealer, wherein, ball sealer and valve body it is interior
Hole is interference fitted, and carrys out retaining spring as the spring seat of honour.
Compared with prior art, the utility model has the advantages that：
The spill valve of the utility model, is conducive to emptying behaviour of the fuel system after empty fuel tank or replacement fuel filter
Make, the air that can thoroughly will build up fuel system low pressure oil intracavitary excludes, and is conducive to the startup of engine.The utility model
Spill valve can avoid increasing extra arrangement evacuated tube, simple in structure, bleeding is simple and thoroughly, good exhaust effect,
And the spill valve of pre-flock venting plug, refined filtration venting plug and oil pump need not be dismantled, greatly reduces cost of labor, improves effect
Rate.
Brief description of the drawings
Fig. 1 a are the stereograms of the side of each several part of spill valve according to the present utility model；
Fig. 1 b are the stereograms of the opposite side of each several part of spill valve according to the present utility model；
Fig. 2 is sectional view of the spool of spill valve according to the present utility model at first position；
Fig. 3 is sectional view of the spool of spill valve according to the present utility model at the second place；
Fig. 4 is sectional view of the spool of spill valve according to the present utility model in the third place.
Main Reference Numerals explanation：
1- valve bodies, the first oil outlets of 2-, 3- spools, 4- exhausting-gas holes, the second oil outlets of 5-, 6- springs, 7- ball sealers, 8- are let out
Oil groove, 9- body tops, the flow path of 10- excess fuels, the height of 11- first, the height of 12- second, 13- discharge the flow path of gas.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality
New protection domain and from the limitation of embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
As shown in Figure 1, the stereogram of each several part for the spill valve of the injection pump according to the utility model.The injection pump bag
The pump housing and low pressure oil pocket are included, injection pump is connected by oil return pipe with fuel tank, and the spill valve of the utility model is used for low pressure oil
The fuel oil of intracavitary is maintained in certain pressure limit, which includes：Valve body 1, spool 3 and sealing device.The sealing
Device includes spring 6 and ball sealer 7.
Wherein, valve body 1 is connected with the pump housing, and the lower part of valve body 1 is provided with external screw thread (as shown in Figure 2), is used for and the pump housing
On internal thread connection, and valve body 1 is arranged at the top of low pressure oil pocket, and valve body 1 is included under the valve body of body top 9 and cylinder
Portion, valve body lower portion are provided with two the first oil outlets 2 being mutually communicated, and the first oil outlet 2 is connected with fuel tank.Body top is
Outer-hexagonal shape, tightening and dismantling for valve body.
Spool 3 is installed on the inside of valve body, and can be moved up and down in the inside of valve body.Spool 3 includes exhausting-gas hole 4 and two
A the second oil outlet 5 being mutually communicated, the aperture of exhausting-gas hole 4 are less than the aperture of the first oil outlet 2, and second fuel-displaced 5 aperture is small
In the aperture equal to the first oil outlet 2.Spool 3 further includes drain pan 8, which is arranged on the outer wall of spool 3, and position
In the top of the second oil outlet 5 of the offside of exhausting-gas hole 4, for the fuel oil accumulated at the top of spool between ball sealer 7 to be arranged
Let out the outside of spill valve.Ball sealer 7 and the endoporus of valve body are interference fitted, so that sealing function is played, and as the spring seat of honour
Carry out retaining spring 7, can be as the spring base of spring 7 at the top of spool.Spring 7 is used to balance and return spool 3.
The course of work of the spill valve is：
In the system exhaust stage, as shown in Fig. 2, when spool is located at first position, two the first oil outlets 2 of valve body 1
It is connected with the exhausting-gas hole 4 of spool 3, so that the exhaust passage of system is formed, so that the gas inside fuel system is flow back to oil
In case.The flow path 13 of discharge gas is shown in Fig. 2.Drain pan 8 is also connected with the first oil outlet 2 at this time, the work of drain pan 8
The outside of spill valve is excreted to for the fuel oil in the space between spool top and ball sealer 7 will likely be accumulated in, so as to prevent
Part fuel oil hinders the movement of spool 3 here.
After the gas in the low pressure oil intracavitary portion of fuel system is all discharged, fuel oil is full of within pump chamber, fuel oil can be from
The exhausting-gas hole 4 of spool 3, the first oil outlet 2 of valve body 1 are back to fuel tank, but due to the exhausting-gas hole 4 on spool 3 aperture compared with
Small, the amount of fuel to be flowed away by spool 3 is considerably less than the amount of fuel of oil transfer pump supply, and the oil pressure rise in pump chamber, oil pressure causes
Spool 3 overcomes spring force up to move, so that the circulation area that the first oil outlet 2 of the exhausting-gas hole 4 of spool 3 and valve body 1 forms
Smaller, spool 3 continue to move up, and when spool 3 is moved to the second place, 4 and second oil outlet 5 of exhausting-gas hole is complete by valve interior wall
It is totally-enclosed, as shown in Figure 3.The height that spool 3 rises is the first height 11, at this time spill valve will no longer oil spilling so that there is no
Fuel oil caused by fuel flow returns wastes, and engine fuel oil system reaches normal operating conditions.At this time, drain pan 8 is kept and the
One oil outlet 2 is connected.
When engine be in that rotating speed is higher and situation (the long descending of such as automobile) that the amount of fuel of actual demand is less, due to defeated
The rotating speed of oil pump is high and fuel gauging valve opening very little, causes the fuel pressure in oil pump pump chamber to raise.Elevated pressure causes
The spool 3 of spill valve overcomes spring force to continue to move up, and when spool 3 is moved to the third place, the height that spool rises at this time is
Second height 12, as shown in Figure 4.At this moment the second oil outlet 5 of spool 3 is connected with the first oil outlet 2 of valve body 1, pumps at this time
The unnecessary fuel oil of intracavitary returns 2 by the second oil outlet 5 of spool 3, the first oil outlet of valve body 1 and is back to fuel tank, so as to prevent
Hypertonia inside pump chamber.At this time, drain pan 8 keeps being connected with the first oil outlet 2.
The description of the foregoing specific exemplary embodiment to the utility model be in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be defined to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
Many change and variations.The purpose of selecting and describing the exemplary embodiment is that explain the certain principles of the utility model
And its practical application, so that those skilled in the art can realize and utilize a variety of examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shape
Formula is limited.
Claims (7)
1. a kind of spill valve of injection pump, which includes the pump housing and low pressure oil pocket, and the injection pump passes through oil return pipe and oil
Case is connected, and the spill valve is used to the fuel oil of the low pressure oil intracavitary being maintained in certain pressure limit, its feature exists
In the spill valve includes：
Valve body, it is connected with the pump housing, and the valve body is arranged at the top of the low pressure oil pocket, and the valve body includes valve body
Top and the valve body lower portion of cylinder, the valve body lower portion are provided with two the first oil outlets being mutually communicated, and described first goes out
Oilhole is connected with the fuel tank；
Spool, it is installed on the inside of the valve body, and can be moved up and down in the inside of the valve body, and the spool includes row
Stomata and two the second oil outlets being mutually communicated；And
Sealing device；
Wherein, when the spool is located at first position, the exhausting-gas hole is connected with first oil outlet, for discharging
State the gas of low pressure oil intracavitary；When the spool is located at the second place, the exhausting-gas hole and second oil outlet are by institute
State the inner wall closing of valve body；When the spool is located at the third place, second oil outlet is connected with first oil outlet
It is logical, for draining excessive fuel oil.
2. spill valve according to claim 1, it is characterised in that the spool further includes drain pan, which is set
In on the outer wall of the spool, and positioned at the exhausting-gas hole offside the second oil outlet top, for spool will to be accumulated in
Fuel oil between top and the ball sealer is excreted to the outside of the spill valve.
3. spill valve according to claim 2, it is characterised in that when the spool is respectively positioned at the first position, the
When two positions and the third place, the drain pan keeps being connected with first oil outlet.
4. spill valve according to claim 1, it is characterised in that the aperture of the exhausting-gas hole is less than first oil outlet
Aperture.
5. spill valve according to claim 1, it is characterised in that the aperture of second oil outlet is less than or equal to described the
The aperture of one oil outlet.
6. spill valve according to claim 1, it is characterised in that the body top is outer-hexagonal shape, for the valve
Body being tightened and dismantling.
7. spill valve according to claim 1, it is characterised in that the sealing device includes spring and ball sealer, wherein,
The endoporus of the ball sealer and the valve body is interference fitted, and is used as the spring seat of honour to position the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721401438.6U CN207315562U (en) | 2017-10-27 | 2017-10-27 | The spill valve of injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721401438.6U CN207315562U (en) | 2017-10-27 | 2017-10-27 | The spill valve of injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207315562U true CN207315562U (en) | 2018-05-04 |
Family
ID=62378794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721401438.6U Withdrawn - After Issue CN207315562U (en) | 2017-10-27 | 2017-10-27 | The spill valve of injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207315562U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762698A (en) * | 2017-10-27 | 2018-03-06 | 广西玉柴机器股份有限公司 | The spill valve of injection pump |
-
2017
- 2017-10-27 CN CN201721401438.6U patent/CN207315562U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762698A (en) * | 2017-10-27 | 2018-03-06 | 广西玉柴机器股份有限公司 | The spill valve of injection pump |
| CN107762698B (en) * | 2017-10-27 | 2019-08-30 | 广西玉柴机器股份有限公司 | The spill valve of injection pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180504 Effective date of abandoning: 20190830 |
|
| AV01 | Patent right actively abandoned |