CN207364352U - A kind of overflow valve for diesel electric-controlled pump - Google Patents
A kind of overflow valve for diesel electric-controlled pump Download PDFInfo
- Publication number
- CN207364352U CN207364352U CN201721429304.5U CN201721429304U CN207364352U CN 207364352 U CN207364352 U CN 207364352U CN 201721429304 U CN201721429304 U CN 201721429304U CN 207364352 U CN207364352 U CN 207364352U
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- China
- Prior art keywords
- overflow valve
- steel ball
- valve body
- valve spring
- spring retainer
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- 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.)
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Abstract
The utility model discloses the overflow valve for diesel electric-controlled pump,Including overflow valve body,Overflow valve spring retainer,Overflow valve spring,Steel ball,Copper washer,Overflow valve body,Overflow valve body be equipped with axially through stepped hole,Overflow valve spring retainer is connected with the big outer end of hole of overflow valve body stepped hole,The macropore of the steel ball and stepped hole is inner to be coordinated,The diameter of steel ball is more than the hole diameter of stepped hole,The matched Internal Spherical Surface of spherical outside surface with steel ball side is equipped with aperture inner side end,Steel ball moves back and forth in overflow valve body,The overflow valve port one of radial direction is equipped with overflow valve body between steel ball and overflow valve spring retainer,The overflow valve port two of radial direction is equipped with overflow valve body between overflow valve port one and overflow valve spring retainer,The spherical outside surface of steel ball opposite side coordinates with overflow valve spring one end,The overflow valve spring other end coordinates with overflow valve spring retainer.The utility model solve the problems, such as under low engine speeds due to pump cavity pressure is unstable and caused by rotary speed unstabilization.
Description
Technical field
Fuel Injection Mechanism of Diesel Engine control device technical field is the utility model is related to, more particularly to one kind is used for diesel electric-controlled pump
Overflow valve.
Background technology
The overflow valve of diesel electric-controlled pump in the prior art, simply symmetrical two are opened up on the valve body of original overflow valve
A overflow port, this structure there are the problem of be that it is unstable and cause rotary speed unstabilization that engine pumps cavity pressure at the low rotational speed.
Utility model content
The utility model is aiming at the shortcomings of the prior art, there is provided a kind of overflow for diesel electric-controlled pump
Valve, the utility model in overflow valve body due to opening up two-stage overflow port or multistage, and level-one overflow valve port diameter is smaller, by defeated
The fuel pressure and overflow valve spring force difference of oil pump supply control position of the steel ball in overflow valve body to realize Grading Overflow
Function, ensures that the pressure after opening moment and opening in pump chamber tends to be steady, changes inviolent, to spray plunger high pressure oil
It is unaffected, solve the problems, such as under low engine speeds due to pump cavity pressure is unstable and caused by rotary speed unstabilization.
The utility model solve technical problem technical solution be:
A kind of overflow valve for diesel electric-controlled pump, including overflow valve body, overflow valve spring retainer, overflow valve spring, steel
Ball, copper washer, overflow valve body, overflow valve body be equipped with axially through stepped hole, overflow valve spring retainer and overflow valve body stepped hole
The connection of big outer end of hole, the macropore of the steel ball and stepped hole is inner to be coordinated, and the diameter of steel ball is more than the hole diameter of stepped hole,
The matched Internal Spherical Surface of spherical outside surface with steel ball side is equipped with aperture inner side end, steel ball can reciprocally be transported in overflow valve body
It is dynamic, the overflow valve port one of radial direction is equipped with the overflow valve body between steel ball and overflow valve spring retainer, in overflow valve port one with overflowing
Flow the overflow valve port two that the overflow valve body between valve spring retainer is equipped with radial direction, spherical outside surface and the overflow valve spring of steel ball opposite side
One end fits, the overflow valve spring other end coordinate with overflow valve spring retainer.
The axis of the overflow valve port two is vertical with the axis of overflow valve port one.
Overflow valve spring retainer and the big outer end of hole of overflow valve body stepped hole are connected through a screw thread.
The gasket of different-thickness is equipped with overflow valve spring retainer and overflow valve body connecting end surface.
The gasket is copper washer.
The overflow valve spring retainer is equipped with axial limiting groove, overflow valve in the position coordinated with the overflow valve spring other end
The spring other end is stretched into axial limiting groove.
The diameter of the overflow valve port one is less than the diameter of overflow valve port two.
The beneficial effects of the utility model:
1. the utility model is in overflow valve body due to opening up two-stage overflow port or multistage, level-one overflow valve port diameter compared with
Small, the fuel pressure and overflow valve spring force difference supplied by oil transfer pump controls position of the steel ball in overflow valve body to realize
Grading Overflow function, ensures that the pressure after opening moment and opening in pump chamber tends to be steady, it is inviolent to change, sprays plunger
High pressure oil it is unaffected, solve the problems, such as under low engine speeds due to pump cavity pressure is unstable and caused by rotary speed unstabilization.
2. the design structure of relief valve is simple, manufacture cost easy to process is low, it is convenient that installing and dismounting is replaced, and ensure that fuel oil
With constant pressure feed plunger, it all ensure that plunger sprays the stabilization of high pressure oil in the slow-speed of revolution or high rotating speed, ensure
Engine is stable.
3., can be according to pre- by being equipped with the gasket of different-thickness in overflow valve spring retainer and overflow valve body connecting end surface
The size of clamp force, the convenient thickness for adjusting replacement gasket carry out the pretightning force of regulation relief valve spring, so as to reach adjusting overflow
The purpose of the Opening pressure of valve.
Brief description of the drawings
Fig. 1 the utility model structure diagrams.
Embodiment
The utility model in order to better understand, explains in detail the embodiment of the utility model below in conjunction with the accompanying drawings.
With reference to Fig. 1, a kind of overflow valve for diesel electric-controlled pump, for limiting the pressure of electric control pump area of low pressure, bag
Include overflow valve body 1, overflow valve spring retainer 3, overflow valve spring 4, steel ball 5, copper washer 2, overflow valve body 1, overflow valve body 1 is equipped with axis
To the stepped hole of perforation, overflow valve spring retainer 3 is connected with 11 outer end of macropore of 1 stepped hole of overflow valve body, the steel ball 5 and ladder
The macropore in hole is inner to be coordinated, and the diameter of steel ball 5 is more than 12 diameter of aperture of stepped hole, aperture 12 and the oil transfer pump oil transportation of stepped hole
Pipeline connects, and is equipped with the matched Internal Spherical Surface of spherical outside surface with steel ball side in aperture inner side end, steel ball 5 can be in overflow valve body
Reciprocable in 1, axially position and the sealing for realizing by Internal Spherical Surface steel ball, between steel ball 5 and overflow valve spring retainer 3
Overflow valve body 1 is equipped with the overflow valve port 1 of radial direction, the overflow valve body 1 between overflow valve port 1 and overflow valve spring retainer 3
It is equipped with the overflow valve port 26 of radial direction, spherical outside surface and 4 one end fits of overflow valve spring of steel ball opposite side, overflow valve spring 4
The other end coordinates with overflow valve spring retainer 3.Overflow valve body 1 that can also be between overflow valve port 26 and overflow valve spring retainer 3
On add the overflow valve ports three of some radial directions again.
The axis of the overflow valve port 26 is vertical with the axis of overflow valve port 1.According to the big of different size overflow valve
Small, the axis of overflow valve port 26 and the axis of overflow valve port 1 are in the axial distance L differences of overflow valve body 1 to adapt to difference
The control requirement of the engine and overflow valve of model.
Overflow valve spring retainer 3 and 11 outer end of macropore of 1 stepped hole of overflow valve body are connected through a screw thread.
Gasket 2 is equipped with overflow valve spring retainer 3 and 1 connecting end surface of overflow valve body, the gasket is copper washer.It is described
The thickness of gasket 2 can be adjusted.
The overflow valve spring retainer 3 is equipped with axial limiting groove 31 in the position coordinated with 4 other end of overflow valve spring, overflows
Stream 4 other end of valve spring is stretched into axial limiting groove.
The diameter of the overflow valve port 1 is less than the diameter of overflow valve port 26.
Since overflow valve spring retainer 3 and overflow valve body 1 are connected through a screw thread, overflow valve spring 4 is compressed the utility model,
Its compression force makes its conical surface tight seal with overflow valve body 1 on steel ball 5.By varying overflow valve spring retainer 3 with overflowing
The thickness of copper washer 2 carrys out the pretightning force of regulation relief valve spring 4 between stream valve body 1, so as to reach the unlatching pressure of regulation relief valve
The purpose of power.
The utility model opens up two-stage overflow port in overflow valve body, and steel ball 5 is arranged in overflow valve body 1 and can be past wherein
Multiple movement.The fuel pressure and overflow valve spring force difference supplied by oil transfer pump control position of the steel ball in overflow valve body come
Realization gradually opens and opens step by step, reaches Grading Overflow function, thus solve under low engine speeds since pump cavity pressure is unstable and
Caused by rotary speed unstabilization.
Utility model works process:
When oil transfer pump charge oil pressure is less than overflow valve opening pressure or oil transportation air pump inoperative, overflow valve is in seal shape
State, ensures oil storage abundance in injection pump low pressure chamber, without air, starts beneficial to next time.
With the rise of engine speed, oil transfer pump charge oil pressure gradually increases, until overflow valve level-one overflow port is opened,
Level-one overflow valve port diameter is smaller, ensure that the pressure after opening moment and opening in pump chamber tends to be steady, change is not violent.
Make the high pressure oil that plunger sprays unaffected, so as to solve the phenomenon of rotary speed unstabilization under low engine speeds.
As engine speed continues to raise, oil transfer pump charge oil pressure continues to increase, until two level overflow port is opened, at this time
The fuel oil for having abundance in pump chamber can not only be made, and ensure that pump cavity pressure is consistent with during high rotating speed in low engine speeds
Property.Stationarity during rotating speed high beneficial to engine.
The design structure of relief valve is simple, manufacture cost easy to process is low, ensure that fuel oil with constant pressure feed column
Plug, all ensure that plunger sprays the stabilization of high pressure oil in the slow-speed of revolution or high rotating speed, ensure that engine is stable.
Although the utility model has shown that and describes the utility model embodiment, to those of ordinary skill in the art
Speech, it is possible to understand that these can be applied with example in the case where not departing from the principle of the utility model and spirit and a variety of change, change, replace
Change and modification, belong to stating within claims for the utility model.
Claims (7)
1. a kind of overflow valve for diesel electric-controlled pump, it is characterized in that, including overflow valve body, overflow valve spring retainer, overflow valve
Spring, steel ball, copper washer, overflow valve body, overflow valve body be equipped with axially through stepped hole, overflow valve spring retainer and overflow valve body
The big outer end of hole connection of stepped hole, the macropore of the steel ball and stepped hole is inner to be coordinated, and the diameter of steel ball is more than the small of stepped hole
Bore dia, is equipped with the matched Internal Spherical Surface of spherical outside surface with steel ball side, steel ball can be in overflow valve body in aperture inner side end
Reciprocable, the overflow valve port one of radial direction is equipped with the overflow valve body between steel ball and overflow valve spring retainer, in overflow valve
Overflow valve body between mouth one and overflow valve spring retainer is equipped with the overflow valve port two of radial direction, and the spherical outside surface of steel ball opposite side is with overflowing
Valve spring one end fits are flowed, the overflow valve spring other end coordinates with overflow valve spring retainer.
2. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 1, it is characterized in that, the overflow valve port two
Axis is vertical with the axis of overflow valve port one.
3. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 1, it is characterized in that, overflow valve spring retainer is with overflowing
The big outer end of hole of stream valve body stepped hole is connected through a screw thread.
4. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 1, it is characterized in that, in overflow valve spring retainer and
Overflow valve body connecting end surface is equipped with gasket.
5. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 4, it is characterized in that, the gasket is copper packing
Circle.
6. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 1, it is characterized in that, the overflow valve spring retainer
Axial limiting groove is equipped with the position coordinated with the overflow valve spring other end, it is recessed that the overflow valve spring other end stretches into axial limiting
In groove.
7. a kind of overflow valve for diesel electric-controlled pump as claimed in claim 1, it is characterized in that, the overflow valve port one
Diameter is less than the diameter of overflow valve port two.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201721429304.5U CN207364352U (en) | 2017-10-30 | 2017-10-30 | A kind of overflow valve for diesel electric-controlled pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201721429304.5U CN207364352U (en) | 2017-10-30 | 2017-10-30 | A kind of overflow valve for diesel electric-controlled pump |
Publications (1)
Publication Number | Publication Date |
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CN207364352U true CN207364352U (en) | 2018-05-15 |
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ID=62345759
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CN201721429304.5U Active CN207364352U (en) | 2017-10-30 | 2017-10-30 | A kind of overflow valve for diesel electric-controlled pump |
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CN (1) | CN207364352U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112594024A (en) * | 2020-11-30 | 2021-04-02 | 沪东重机有限公司 | Pressure regulating valve for lubricating oil system of high-power diesel engine |
-
2017
- 2017-10-30 CN CN201721429304.5U patent/CN207364352U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112594024A (en) * | 2020-11-30 | 2021-04-02 | 沪东重机有限公司 | Pressure regulating valve for lubricating oil system of high-power diesel engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right |
Effective date of registration: 20190118 Address after: 265718 High-tech Industrial Park of Longkou City, Yantai City, Shandong Province Patentee after: Longkou dragon pump diesel 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. |
|
TR01 | Transfer of patent right |