CN206801747U - A kind of monoblock pump return pressure adjustment structure - Google Patents
A kind of monoblock pump return pressure adjustment structure Download PDFInfo
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- CN206801747U CN206801747U CN201621486548.2U CN201621486548U CN206801747U CN 206801747 U CN206801747 U CN 206801747U CN 201621486548 U CN201621486548 U CN 201621486548U CN 206801747 U CN206801747 U CN 206801747U
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Abstract
A kind of monoblock pump return pressure adjustment structure disclosed in the utility model, including monomer plunger pump and magnetic valve, monomer plunger pump includes the monomer pump housing, plunger, plunger spring and plunger spring seat, and plunger valve opening and high pressure spray oilhole are coaxially arranged with the monomer pump housing and control valve pocket is provided with monoblock pump body；Magnetic valve includes electromagnet, armature, electromagnet spring, control valve element, valve pocket, block, and it is provided with fuel feed hole, oil inlet passage, spill port and drainback passage close to the position of control valve pocket in the monomer pump housing, one section of damping hole is provided with drainback passage.The utility model in drainback passage by setting damping hole, you can realization, which reaches, substitutes traditional voltage stabilizing valve gear.The utility model is not on the premise of extra stable-pressure device is increased, the regulation of return pressure is realized using the oil channel structure feature of monomer pump body, by adjusting return pressure, the precharge pressure of the oil suction chamber of monoblock pump can be accordingly adjusted, further realizes the pump end pressure of monoblock pump.
Description
Technical field
Monomer pump technical field peculiar to vessel is the utility model is related to, return pressure regulation knot inside more particularly to a kind of monoblock pump
Structure.
Background technology
As the requirement more and more higher to environmental protection, the research to dual fuel of diesel engine and control become both at home and abroad
The focus and difficulties of diesel engines at present research.The MARPOL pact supplemental provisions VI of the newest amendments of International Maritime Organization IMO is to ship
Increasingly strict requirements are proposed with diesel engine NOX discharge.From in January, 2011, IMO TIER II Abgasgesetzs are in IMO
Enforced in all contracting party marine sites.TIER II stage DS NOx Est amounts are preceding to be directed to this than TIER I reductions by 16%~20%
The major marine diesel manufacturer in the one standard world has had substantial amounts of TIER II types to put goods on the market, and January 1 in 2016
Day, which rises, will enforce TIER III stage regulations, it is desirable to which DS NOx Est amount reduces by 80% compared to TIER I-stages, and this is to manufacture
Business proposes higher requirement, the injection pressure requirements more and more higher to fuel system, while the reliability for mutually tackling system will
Seek more and more higher.
The content of the invention
The purpose of this utility model is that the defects of existing monoblock fuel-injection pump of solution uses traditional voltage stabilizing valve arrangement causes
Diesel engine starting difficulty, the failure problems such as power swing.Traditional voltage stabilizing valve member is in voltage stabilizing valve body using sealed steel ball
The conical surface on realize sealing, while adjust using spring the Opening pressure size of steel ball, and when cone face process precision is overproof or
It can cause hermetic unit failure or entirely ineffective after cleannes and the conical surface abrasion of fuel oil, and cause the ripple of monoblock pump input pressure
It is dynamic to cause monoblock pump oil suction to be fluctuated, the power swing of diesel engine is further resulted in, can be caused when voltage stabilizing valve member is entirely ineffective
Diesel engine can not start.The purpose of this utility model is to provide return pressure adjustment structure inside a kind of monoblock pump, the monoblock pump
Internal return pressure adjustment structure realizes that the regulation of return pressure can be effective using the oil channel structure feature of monomer pump body
Avoid above-mentioned all problems.
To achieve the above object, technical scheme is used by the utility model：
Return pressure adjustment structure inside a kind of monoblock pump, including monomer plunger pump and magnetic valve, the monomer plunger pump
Including the monomer pump housing, plunger, plunger spring and plunger spring seat, plunger valve opening and height are coaxially arranged with the monomer pump housing
Pressure nozzle opening is simultaneously provided with control valve pocket in the monoblock pump body, and the control valve pocket is mutually communicated with the high pressure spray oilhole
And both axis are mutually perpendicular to；The Part I of the plunger is inserted in the plunger hole, and Part II extends the list
The body pump housing, the plunger spring seat are fixed on the end of the plunger Part II, are arranged on the Part II of the plunger
There is the plunger spring, one end of the plunger spring contacts with the monomer pump housing, the second end and the post of plunger spring
Fill in spring base contact；The magnetic valve includes electromagnet, armature, electromagnet spring, control valve element, valve pocket, block, the block
Installed in the control valve pocket first end and the first end of the control valve pocket is closed, the electromagnet is pacified by adjusting cushion block
Mounted in the second end of the control valve pocket and the second end seal of the control valve pocket is closed, the valve pocket is arranged on the control valve pocket
Interior, the armature is arranged in the endoporus of the adjustment cushion block, and the control valve element is arranged in the valve pocket, the control valve
Oil suction gap is provided between the first end of core and the valve pocket, the second end and the armature driving of the control valve element connect
Connect, the electromagnet spring is set on the second end of the control valve element and is arranged on by spring base in the control valve pocket
To drive the control valve core reset；Characterized in that, the position of control valve pocket is provided with oil-feed in the monomer pump housing
Hole, oil inlet passage, spill port and drainback passage, the import of the fuel feed hole are connected with the oil inlet pipe, the outlet of fuel feed hole with
The entrance connection of the oil inlet passage, the outlet of the spill port connect with the oil return pipe, the oil return pipe and the fuel tank
Connection, the outlet of the spill port is connected with the outlet of the drainback passage；Set between the block and the control valve pocket
The first oil inlet and oil return chamber is equipped with, high-voltage oil cavity is provided between the control valve element and the valve pocket, in the control valve in-core
The second oil inlet and oil return chamber is provided with, is provided with the 3rd oil inlet and oil return chamber between the control valve element and the control valve pocket, wherein institute
The outlet of the first oil inlet and oil return chamber and the oil inlet passage is stated, on the one hand the high-voltage oil cavity connects with the oil suction gap,
On the other hand connected with the high pressure spray oilhole；The second oil inlet and oil return chamber enters back with the first oil inlet and oil return chamber, the 3rd respectively
Oil pocket is connected, and the 3rd oil inlet and oil return chamber is connected with the entrance of the drainback passage；One section is provided with the drainback passage
Damping hole.
In a preferred embodiment of the present utility model, the draw ratio of the damping hole is set according to diesel engine different demands
Meter is different.
In a preferred embodiment of the present utility model, the aperture of the damping hole is Φ 1.5, length 15mm.
The utility model in drainback passage by setting damping hole, you can realization, which reaches, substitutes traditional voltage stabilizing valve gear.
The utility model realizes oil return on the premise of extra stable-pressure device is not increased, using the oil channel structure feature of monomer pump body
The regulation of pressure, by adjusting return pressure, the precharge pressure of the oil suction chamber of monoblock pump can be accordingly adjusted, further realizes monomer
The pump end pressure of pump.
Brief description of the drawings
Fig. 2 is the appearance schematic diagram of the utility model monoblock pump.
Fig. 1 is Fig. 2 A-A sectional views.
Fig. 3 is Fig. 1 E-E sectional views.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples, but therefore not limited the utility model
In described scope of embodiments.
Referring to Fig. 1 to Fig. 3, return pressure adjustment structure inside a kind of monoblock pump for being provided in figure, including monomer plunger pump
It is same in the monomer pump housing 1 and magnetic valve, monomer plunger pump include the monomer pump housing 1, plunger 6, plunger spring 4 and plunger spring seat 5
Axle be provided with plunger valve opening 13 and high pressure spray oilhole 14 and be provided with the monomer pump housing 1 control valve pocket 15, control valve pocket 15 with
High pressure spray oilhole 14 is mutually communicated and both axis are mutually perpendicular to.
In the top half insertion plunger hole 13 of plunger 6, the monomer pump housing 1 is extended in the latter half, and plunger spring seat 5 is fixed
In the end of the latter half of plunger 6, plunger spring 4, the upper end of plunger spring 4 and list are arranged with the latter half of plunger 6
The body pump housing 1 contacts, and lower end contacts with plunger spring seat 5.
Magnetic valve includes electromagnet 10, armature 9, electromagnet spring 7, control valve element 8, valve pocket 3, block 2, and block 2 is installed
Controlling the left end of valve pocket 15 and closing the left end of the control valve pocket 15, electromagnet 10 is arranged on control by adjusting cushion block 16
The right-hand member of valve pocket 15 processed simultaneously closes the right-hand member of the control valve pocket 15, and valve pocket 3 is arranged in control valve pocket 15, and armature 9 is arranged on
In the endoporus 17 for adjusting cushion block 16, control valve element 8 is arranged in valve pocket 3, is provided between the right-hand member and valve pocket 3 of control valve element 8
Oil suction gap 27, the oil suction gap 27 are 0.2mm.
The left end and the drive connection of armature 9 of valve element 8 are controlled, electromagnet spring 7 is set on the left end of control valve element 8 and led to
Cross spring base 18 and be arranged in control valve pocket 8 and resetted with drive control valve element 8.
The monomer pump housing 1 is provided with fuel feed hole 19, oil inlet passage 20, spill port 21 and oil return close to the position of control valve pocket 15
Passage 22, the import of fuel feed hole 19 are connected with oil inlet pipe (not shown), and oil inlet pipe is connected with fuel tank.The outlet of fuel feed hole 19
Connected with the entrance of oil inlet passage 20.
The outlet of spill port 21 connects with oil return pipe (not shown), and oil return pipe connects with fuel tank, and spill port 21 goes out
Mouth is connected with the outlet of drainback passage 22.
The first oil inlet and oil return chamber 23 is provided between block 2 and control valve pocket 15, is set between control valve element 8 and valve pocket 3
High-voltage oil cavity 24 is equipped with, the second oil inlet and oil return chamber 25 is provided with control valve element 8, between control valve element 8 and control valve pocket 15
The 3rd oil inlet and oil return chamber 26 is provided with, wherein the outlet of the first oil inlet and oil return chamber 23 and oil inlet passage 20.
The one side of high-voltage oil cavity 24 connects with oil suction gap 27, is on the other hand connected with high pressure spray oilhole 14；Second enters back
Oil pocket 25 connects with the first oil inlet and oil return chamber 23, the 3rd oil inlet and oil return chamber 26 respectively, and the 3rd oil inlet and oil return chamber 26 enters with drainback passage 22
Mouth connection；One section of damping hole 22a is provided with drainback passage 22, damping hole 22a draw ratio is according to diesel engine different demands
Design is different.Damping hole 22a aperture is Φ 1.5, length 15mm in present embodiment.
Operation principle：Injection pump provides the sufficiently high fuel oil of pressure to fuel injector, is the process of an oil suction and force feed, it
It is by being moved back and forth in plunger valve opening 13 of the plunger 6 in the monomer pump housing 1 to complete.When realizing monomer in the folding process of plunger 6
From oil inlet pipe oil suction, the oil that monoblock pump is inhaled by fuel sucking pipe is partly into the first oil inlet and oil return chamber 23, second back the pump housing
In the oil inlet and oil return chamber 26 of oil pocket 25 and the 3rd, the oil suction gap of the 0.2mm between control valve element 8 and valve pocket 3 that another part passes through
27 are drawn into high-voltage oil cavity 24, the appropriate moment are moved on plunger 6, after ECU gives the electrical instruction of electromagnet 10, electromagnet 10 to be powered
Suction is produced, this suction, which is delivered to control valve element 8 by armature 9 and closes oil suction gap 27, forms hydraulic oil oil spout outward.It is more
Remaining a part of fuel oil returns to fuel tank by spill port 21.Due to above series of action be all in a short period of time complete and
All move in circles progress, therefore the oil-feed inside monoblock pump is included by controlling the 0.2mm's between valve element 8 and valve pocket 3
The oil suction and oil return in oil suction gap 27 be influence each other, mutual lotus root close a process.Pass through the oil return of monoblock pump in this invention
Passage 22 can directly affect the first oil inlet and oil return chamber 23 after increasing Φ 1.5 long damping hole 22a, the second oil inlet and oil return chamber 25 and the 3rd enters
The pressure of oil back chamber 26, and this pressure can further have influence on monoblock pump by controlling between valve element 8 and valve pocket 3
The abundant degree of oil suction in 0.2mm oil suction gap 27, pressure more high oil absorption is more abundant, and oil absorption is more in the identical unit interval
The pump end pressure of formation can be higher, otherwise the pump end pressure formed can be lower.So this director's damping hole serve equivalent to
The effect of oil return voltage stabilizing valve-regulated devices.
Damping hole 22a adjusts the theory of the first oil inlet and oil return chamber 23, the second oil inlet and oil return chamber 25 and the pressure of the 3rd oil inlet and oil return chamber 26
Basis is as follows：(damping hole outside is atmospheric pressure p0 to the pressure differential △ P at damping hole 22a both ends, damping hole 22a internal pressures are
P1 is the pressure of oil inlet and oil return chamber),
According to
(it by flow, the u of damping hole is the dynamic viscosity of fuel oil that q, which is, in formula, d0 is damping aperture, and l is damping hole length), because
This can reach the purpose of regulation oil inlet and oil return cavity pressure by adjusting the ratio of damping hole length and aperture.
Claims (3)
1. a kind of monoblock pump return pressure adjustment structure, including monomer plunger pump and magnetic valve, the monomer plunger pump includes single
The body pump housing, plunger, plunger spring and plunger spring seat, plunger valve opening and high pressure fuel injector are coaxially arranged with the monomer pump housing
Hole is simultaneously provided with control valve pocket in the monoblock pump body, and the control valve pocket is mutually communicated with the high pressure spray oilhole and both
Axis be mutually perpendicular to；The Part I of the plunger is inserted in the plunger hole, and Part II extends the monomer pump housing,
The plunger spring seat is fixed on the end of the plunger Part II, and the post is arranged with the Part II of the plunger
Spring is filled in, one end of the plunger spring contacts with the monomer pump housing, the second end of plunger spring and the plunger spring seat
Contact；The magnetic valve includes electromagnet, armature, electromagnet spring, control valve element, valve pocket, block, and the block is arranged on institute
State the first end of control valve pocket and close the first end of the control valve pocket, the electromagnet is by adjusting cushion block installed in described
Control the second end of valve pocket and close the second end seal of the control valve pocket, the valve pocket is arranged on the control valve intracavitary, described
Armature is arranged in the endoporus of the adjustment cushion block, and the control valve element is arranged in the valve pocket, and the of the control valve element
Oil suction gap, the second end of the control valve element and the armature drive connection are provided between one end and the valve pocket, it is described
Electromagnet spring is set on the second end of the control valve element and is arranged on by spring base in the control valve pocket to drive
The control valve core reset；Characterized in that, the position of control valve pocket is provided with fuel feed hole, oil-feed in the monomer pump housing
Passage, spill port and drainback passage, the import of the fuel feed hole are connected with the oil inlet pipe, the outlet of fuel feed hole and the oil-feed
The entrance connection of passage, the outlet of the spill port connect with the oil return pipe, and the oil return pipe connects with fuel tank, the oil return
The outlet in hole is connected with the outlet of the drainback passage；The first oil inlet and oil return is provided between the block and the control valve pocket
Chamber, high-voltage oil cavity is provided between the control valve element and the valve pocket, the control valve in-core, which is provided with second, to be entered back
Oil pocket, the 3rd oil inlet and oil return chamber is provided between the control valve element and the control valve pocket, wherein the first oil inlet and oil return chamber
With the outlet of the oil inlet passage, on the one hand the high-voltage oil cavity connects with the oil suction gap, on the other hand with it is described
High pressure spray oilhole connects；The second oil inlet and oil return chamber connects with the first oil inlet and oil return chamber, the 3rd oil inlet and oil return chamber respectively, and described
Three oil inlet and oil return chambers are connected with the entrance of the drainback passage；One section of damping hole is provided with the drainback passage.
A kind of 2. monoblock pump return pressure adjustment structure as claimed in claim 1, it is characterised in that the major diameter of the damping hole
It is more different than being designed according to diesel engine different demands.
A kind of 3. monoblock pump return pressure adjustment structure as claimed in claim 1, it is characterised in that the aperture of the damping hole
For Φ 1.5, length 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486548.2U CN206801747U (en) | 2016-12-31 | 2016-12-31 | A kind of monoblock pump return pressure adjustment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486548.2U CN206801747U (en) | 2016-12-31 | 2016-12-31 | A kind of monoblock pump return pressure adjustment structure |
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| Publication Number | Publication Date |
|---|---|
| CN206801747U true CN206801747U (en) | 2017-12-26 |
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ID=60729465
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621486548.2U Active CN206801747U (en) | 2016-12-31 | 2016-12-31 | A kind of monoblock pump return pressure adjustment structure |
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| CN (1) | CN206801747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640458A (en) * | 2016-12-31 | 2017-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil return pressure regulating structure of monoblock pump |
-
2016
- 2016-12-31 CN CN201621486548.2U patent/CN206801747U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640458A (en) * | 2016-12-31 | 2017-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil return pressure regulating structure of monoblock pump |
| CN106640458B (en) * | 2016-12-31 | 2023-02-28 | 南岳电控（衡阳）工业技术股份有限公司 | Oil return pressure adjusting structure of monoblock pump |
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