CN205956732U - Lubricated formula high pressure common rail pump overflow valve of diesel oil - Google Patents
Lubricated formula high pressure common rail pump overflow valve of diesel oil Download PDFInfo
- Publication number
- CN205956732U CN205956732U CN201620958761.2U CN201620958761U CN205956732U CN 205956732 U CN205956732 U CN 205956732U CN 201620958761 U CN201620958761 U CN 201620958761U CN 205956732 U CN205956732 U CN 205956732U
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- Prior art keywords
- cavity
- hole
- valve element
- common rail
- valve body
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- Expired - Fee Related
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- 239000002283 diesel fuel Substances 0.000 title claims abstract description 21
- 238000005461 lubrication Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 15
- 239000000295 fuel oil Substances 0.000 description 9
- 230000001050 lubricating effect Effects 0.000 description 7
- 238000012546 transfer Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000010761 intermediate fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Abstract
The utility model provides a pair of lubricated formula high pressure common rail pump overflow valve of diesel oil, the present invention comprises a valve body and a valve core, the valve body lower extreme is equipped with the spout hole, the valve body intermediate position is equipped with oil cavity I, the valve body upper end is equipped with the low pressure seal circle, valve body inner chamber shoulder hole main aspects are cavity I, the tip is a cavity II, I upper end of cavity is equipped with sealing device, be equipped with the case in the cavity II, be equipped with the spring between case and the steel ball, be equipped with cavity III in the case, the case up end is equipped with cylindrical boss, cylindrical boss intermediate position is equipped with urgent oil cavity, the case upper end is equipped with round ring channel I, be equipped with the retaining ring in the circle ring channel I, I downside of circle ring channel is equipped with the pressure release hole on the case, pressure release hole downside is equipped with oil cavity II, the case lower extreme is equipped with round ring channel II. The utility model provides a lubricated formula high pressure common rail pump overflow valve of diesel oil need not design lubrication passage, simple structure, and the cost sees the bottom.
Description
Technical field
The utility model is related to overflow valve technical field, specifically a kind of diesel fuel lubricity formula high voltage common rail pump overflow
Valve.
Background technology
Existing number of patent application is 201020105119.2, and the applying date is 2010.01.26, and patent name is a kind of lubrication
With the utility model patent of variable-pressure overflow valve, its technical scheme is a kind of variable-pressure overflow valve used for lubricating, including valve body, valve element and bullet
Spring, described valve element is slidably fitted in valve body, and described valve body one end is provided with oil-in, and the other end is bolted with pressure regulation screw plug,
One end of described spring and pressure regulation screw plug push against, and the other end is pushed against with valve element, have axial oilhole in valve element, described oil-in
Can be communicated with fuel tank by axial oilhole and spout hole.The variable-pressure overflow valve used for lubricating that the utility model provides needs design special
Lubrication channel, complex structure, increased cost.
Utility model content
The purpose of this utility model is to solve the above problems, and a kind of structure of design is simple, light, a kind of bavin of low cost
Oil lubricating type high voltage common rail pump overflow valve.
The technical scheme in the invention for solving the technical problem is：
A kind of diesel fuel lubricity formula high voltage common rail pump overflow valve, including valve body and valve element, is characterized in that, described valve body lower end circle
Radially it is provided with spout hole on cylinder, the described valve body centre position face of cylinder is radially provided with lubrication hole I, described valve body cylinder
It is provided with external screw thread between face overflow discharge orifice and lubrication hole I, on the upside of lubrication hole I on described valve body, be provided with low pressure seal circle, described valve
Intracoelomic cavity is shoulder hole, and the big end of described shoulder hole is cavity I, and described shoulder hole small end is cavity II, and described cavity I upper end is provided with
Sealing device, is provided with valve element in described cavity II, is provided with spring, institute in described cavity I between valve element upper surface and sealing device
State and in valve element, be provided with cavity III, described valve element upper surface is provided with cylindrical boss, described cylindrical boss centre position is along valve element
Axis direction is provided with emergency lubrcation hole, and the described valve element upper end face of cylinder is provided with annular groove I, is provided with described annular groove I
Back-up ring, described valve element is radially provided with relief hole on the downside of annular groove I, is radially provided with profit on the downside of relief hole on described valve element
Slide opening II, is provided with annular groove II on the downside of described valve element lower end lubrication hole II.
Further, described sealing device adopts steel ball structure, between described steel ball spherome surface and cavity I inwall is
It is full of cooperation.
Sealing cooperation between described valve element and cavity II inwall, the diameter of described valve element upper surface cylindrical boss is less than valve
The outside diameter of core.
Described spring upper end is contacted with sealing device, and described lower spring end is enclosed within the cylindrical boss of valve element upper surface, institute
State cooperation between spring and the cylindrical boss face of cylinder to contact, described lower spring end is more than cylinder with valve element upper end outside diameter
Projection section contacts.
Described emergency lubrcation hole upper and lower ends are round taper hole.
Described back-up ring is contacted with the cooperation of annular groove I inwall, and described back-up ring external cylindrical surface is with diameter greater than the diameter of cavity II.
Described low pressure seal circle adopts polytetrafluoroethylmaterial material.
The beneficial effects of the utility model are：
1st, the diesel fuel lubricity formula high voltage common rail pump structure of relief valve that the utility model provides is simple, compact, described cavity III
As lubrication channel, save the design of Special lubricating passage passage, structure is simple, more preferable with regard to letter just meet modern common rail pump
Light design concept, reduces processing cost.
2nd, the diesel fuel lubricity formula high voltage common rail pump overflow valve that the utility model provides is provided with emergency lubrcation hole, high voltage common rail pump
When rotor just starts to rotate, oil transportation pump pressure is not high, and the oil pressure in cavity III there is no method to overcome initial tension of spring, in pump chamber no
Diesel oil as lubrication, if cannot get diesel fuel lubricity for a long time, can accelerate oil pump parts to wear and tear.Described emergency lubrcation hole is by oil transportation
Pump supply low-pressure fuel oil timely compensate in pump chamber, play lubricating detail effect.Described emergency lubrcation hole upper and lower ends
It is set to cone, facilitate low-pressure fuel oil to pass through emergency lubrcation hole.
3rd, the diesel fuel lubricity formula high voltage common rail pump relief valve spool lower end that the utility model provides is provided with cannelure II, described
Cannelure II can reduce the contact area between the valve element face of cylinder and cavity II, reduces the mill between the valve element face of cylinder and cavity II
Damage, described valve element lower end is provided with cannelure II and can reduce the requirement in process to cylindricity for the valve element, reduces cost,
4th, the diesel fuel lubricity formula high voltage common rail pump overflow valve that the utility model provides ensure that fuel oil is supplied with constant pressure
It is given in engine it is ensured that the rail pressure of common rail system is stable, thus ensure that engine is stable.
5th, the diesel fuel lubricity formula high voltage common rail pump overflow valve that the utility model provides is worked as fuel system in-line fuel oil and is mixed
During miscellaneous air, emergency lubrcation hole introduces air into rapidly drainback passage, and exhaust is easier, thus ensure that rail pressure stability, profit
In engine start.
Brief description
Fig. 1 is sectional view under the utility model emergency lubrcation state；
Fig. 2 is sectional view under the normal lubricating status of the utility model；
Fig. 3 is sectional view under the utility model lubricating oil return state.
In figure：1st, valve body, 11, cavity I, 12 lubrication holes I, 13, spout hole, 14, cavity II, 2, valve element, 21, emergency lubrcation
Hole, 22, annular groove I, 23, relief hole, 24, cavity III, 25, cylindrical boss, 26, lubrication hole II, 27, annular groove II,
3rd, back-up ring, 4, spring, 5, steel ball, 6, low pressure seal circle.
Specific embodiment
According to Fig. 1 to Fig. 3, a kind of overflow valve of diesel fuel lubricity formula high voltage common rail pump, including valve body 1 and valve element 2, institute
State the valve body 1 lower end face of cylinder radially even be provided with four spout holes 13, the described valve body 1 centre position face of cylinder is radially equal
Even be provided with four and be provided with lubrication hole I 12, set between described valve body 1 face of cylinder overflow discharge orifice 13 upside and lubrication hole I 12 downside
There is external screw thread, on the upside of lubrication hole I 12 on described valve body 1, be provided with low pressure seal circle 6, described low pressure seal circle 6 seals, prevent
Only the lubricating oil in the high voltage common rail pump pump housing overflows from the pump housing.
Described valve body 1 inner chamber is shoulder hole, and the big end of described shoulder hole is cavity I 11, and described shoulder hole small end is cavity II
14, described cavity I 11 upper end is provided with sealing device, and described sealing device adopts steel ball 5, between described steel ball 5 and cavity 1 inwall
For interference fit.It is provided with valve element 2, sealing cooperation, described valve between described valve element 2 and cavity II 14 inwall in described cavity II 14
Core 2 upper surface is provided with cylindrical boss 25, and the diameter of described cylindrical boss 25 is less than the outside diameter of valve element 2, described cavity I
It is provided with spring 4 between valve element 2 upper surface and steel ball 5 spherome surface, described spring 4 upper end is contacted with steel ball 5 spherome surface in 11,
Described spring 4 lower end is enclosed within cylindrical boss 25, coordinates and contact between described spring 4 and cylindrical boss 25 face of cylinder, institute
State the part contact that spring 4 lower end and valve element 2 upper surface are with diameter greater than cylindrical boss 25, described spring 4 provides pre- for valve element 2
Clamp force.It is provided with cavity III 24, described cylindrical boss 25 is provided with emergency lubrcation hole 21, institute along valve element 2 axial direction in described valve element 2
Stating emergency lubrcation hole 21 upper and lower ends is round taper hole, and described round taper hole facilitates the fuel oil in cavity III 24 to pass through.Described valve
The core II 2 upper end face of cylinder is provided with annular groove I 22, is provided with back-up ring 3, described back-up ring 3 and annular in described annular groove I 22
The cooperation contact of groove I 22 inwall, the diameter with diameter greater than cavity II 14 of described back-up ring 3, described back-up ring 3 plays axially position effect.
Radially it is provided with a relief hole 23, described relief hole 23 is cavity III 24 intermediate fuel oil on the downside of annular groove I 22 on described valve element 2
The passage flowing out, on described valve element 2, relief hole 23 lower end is provided with lubrication hole II 26, radially even the dividing of described lubrication hole II 26
It is furnished with four, it is indirectly that described lubrication hole II 26 enables the fuel oil in cavity III 24 to lubricate valve body 1 inwall valve element 2 faces of cylinder
Tactile part, reduces abrasion.Described valve element 2 lower end, is provided with annular groove II 27, described annular groove II on the downside of lubrication hole II 26
27 can reduce the contact area between valve element 2 face of cylinder and valve body 1 inwall.
When high-pressure common rail pump rotor just starts, in high voltage common rail pump, oil transportation pump pressure is not high, the oil in cavity III 24
Pressure there is no method to overcome the pretightning force that overflow valve spring 4 is applied on valve element 2, and now described valve element II 2 is located at valve body 1 inner chamber ladder
The position of bottom in hole, described annular groove 22 lower surface is parallel with valve body 1 inner chamber ladder upper surface, described back-up ring 3 following table
Face and valve body 1 inner chamber ladder upper surface, relief hole 23 and spout hole 13 are in closed state, now urgent on valve element 2
Lubrication hole 21 by high voltage common rail pump oil transfer pump supply low-pressure fuel oil timely compensate in pump chamber, play lubricating detail make
With.When in high voltage common rail pump, oil transportation pump pressure increases so that the oil pressure counter overflow valve spring 4 in cavity III 24 is applied to valve element
During 2 pretightning force, spring 4 compresses, and relief valve spool 2 moves upwards, when pressure can reach overflow valve opening pressure, overflow
Valve is opened, and now described annular groove 22 lower surface place plane is located above valve body 1 inner chamber ladder upper surface, described back-up ring 3
Lower surface place plane is located above valve body 1 inner chamber ladder upper surface, and relief hole 23 is in open mode, and spout hole 13 is in envelope
Closed state, described fuel oil returns rapidly lubrication pump chamber inner body in pump chamber by relief hole 23.When oil transfer pump in high voltage common rail pump
When rotating speed is higher, the fuel pressure that oil transfer pump provides accordingly increases, and the oil pressure counter overflow valve spring 4 in cavity III 24 is applied to
The elastic force of valve element 2, spring 4 continues compression, and valve element 2 rises, and now spout hole 13 is in open mode, and part fuel oil feeds back oil pump
Compensate oil transfer pump, partly enter in high voltage common rail pump pump chamber, play lubricating oil return effect.
Although the above-mentioned accompanying drawing that combines is described to specific embodiment of the present utility model, not new to this practicality
The restriction of type protection domain, on the basis of technical solutions of the utility model, those skilled in the art do not need to pay creativeness
Various modifications that work can be made or deformation are still within protection domain of the present utility model.
Claims (7)
1. a kind of diesel fuel lubricity formula high voltage common rail pump overflow valve, including valve body and valve element, is characterized in that, described valve body lower end cylinder
Radially it is provided with spout hole on face, the described valve body centre position face of cylinder is radially provided with lubrication hole I, the described valve body face of cylinder
It is provided with external screw thread between overflow discharge orifice and lubrication hole I, on the upside of lubrication hole I on described valve body, be provided with low pressure seal circle, described valve body
Inner chamber is shoulder hole, and the big end of described shoulder hole is cavity I, and described shoulder hole small end is cavity II, and described cavity I upper end is provided with close
Seal apparatus, are provided with valve element in described cavity II, are provided with spring in described cavity I between valve element upper surface and sealing device, described
It is provided with cavity III, described valve element upper surface is provided with cylindrical boss, and described cylindrical boss centre position is along poppet shaft in valve element
Line direction is provided with emergency lubrcation hole, and the described valve element upper end face of cylinder is provided with annular groove I, is provided with gear in described annular groove I
Circle, described valve element is radially provided with relief hole on the downside of annular groove I, is radially provided with lubrication on the downside of relief hole on described valve element
Hole II, is provided with annular groove II on the downside of described valve element lower end lubrication hole II.
2. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, described sealing device adopts
Steel ball structure, is interference fit between described steel ball spherome surface and cavity I inwall.
3. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, described valve element and cavity II
Sealing cooperation between inwall, the diameter of described valve element upper surface cylindrical boss is less than the outside diameter of valve element.
4. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, described spring upper end with close
Seal apparatus contact, and described lower spring end is enclosed within the cylindrical boss of valve element upper surface, described spring and the cylindrical boss face of cylinder
Between cooperation contact, described lower spring end and valve element upper end outside diameter are more than cylindrical boss part contact.
5. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, on described emergency lubrcation hole
Lower two ends are round taper hole.
6. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, described back-up ring and annular
The cooperation contact of groove I inwall, described back-up ring external cylindrical surface is with diameter greater than the diameter of cavity II.
7. diesel fuel lubricity formula high voltage common rail pump overflow valve according to claim 1, is characterized in that, described low pressure seal circle is adopted
Use polytetrafluoroethylmaterial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620958761.2U CN205956732U (en) | 2016-08-26 | 2016-08-26 | Lubricated formula high pressure common rail pump overflow valve of diesel oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620958761.2U CN205956732U (en) | 2016-08-26 | 2016-08-26 | Lubricated formula high pressure common rail pump overflow valve of diesel oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205956732U true CN205956732U (en) | 2017-02-15 |
Family
ID=57981080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620958761.2U Expired - Fee Related CN205956732U (en) | 2016-08-26 | 2016-08-26 | Lubricated formula high pressure common rail pump overflow valve of diesel oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205956732U (en) |
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 |
| CN109050162A (en) * | 2018-08-10 | 2018-12-21 | 浙江厚达智能科技股份有限公司 | Buffer wear-preventive castor connector |
-
2016
- 2016-08-26 CN CN201620958761.2U patent/CN205956732U/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| CN109050162A (en) * | 2018-08-10 | 2018-12-21 | 浙江厚达智能科技股份有限公司 | Buffer wear-preventive castor connector |
| CN109050162B (en) * | 2018-08-10 | 2020-02-18 | 浙江厚达智能科技股份有限公司 | Buffer wear-proof type caster connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181008 Address after: 265718 Shandong Longkou City high tech Industrial Park Patentee after: LONGKOU LONGBENG DIESEL OIL INJECTION HIGH-TECH Co.,Ltd. Address before: 264006 No. 1 Yanhe Road, Longkou City East Street, Yantai, Shandong Patentee before: LONGKOU LONGBENG FUEL INJECTION Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 |