CN107300029A - Pressure limiting valve - Google Patents
Pressure limiting valve Download PDFInfo
- Publication number
- CN107300029A CN107300029A CN201710705274.4A CN201710705274A CN107300029A CN 107300029 A CN107300029 A CN 107300029A CN 201710705274 A CN201710705274 A CN 201710705274A CN 107300029 A CN107300029 A CN 107300029A
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- China
- Prior art keywords
- plunger
- round platform
- pressure limiting
- valve
- limiting 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a kind of pressure limiting valve, it is related to engine lubrication system field, it includes offering the valve body of valve pocket, plunger and spring in valve pocket, the spring one end connection plunger, the other end are fixed on valve pocket bottom, oil inlet and oil-out are offered on the valve body, the end face of the plunger towards oil inlet is provided with big round platform, and the big round platform is provided with small round platform.The present invention can slow down impulsive force of the fluid to plunger, reduce the pressure oscillation of fluid around plunger, reduce operating noise, and its performance is stable, service life is long.
Description
Technical field
The present invention relates to engine lubrication system, a kind of especially pressure limiting valve of engine oil pump.
Background technology
Pressure limiting valve, as one of parts of engine oil pump lubricating system, it can maintain the steady of oil pressure in main oil gallery
Fixed, when high engine speeds operating, the oil pressure of main oil gallery is higher than needed for engine during the oil pressure of fluid, and pressure limiting valve will be unlocked,
A part of fluid of main oil gallery is let out toward oil sump, so as to reduce the oil pressure of access to engine oil duct, remains normal in main oil gallery
Oil pressure, conversely, when the engine operates with a low speed, pressure limiting valve can be closed.
Pressure limiting valve is typically mounted on the pump housing of lubricating oil pump, in the prior art, and pressure limiting valve is mainly plunger type pressure limiting valve,
As shown in figure 1, pressure limiting valve includes valve body 1, plunger 2 and spring 3, plunger 2 by the hydraulic coupling of main oil gallery and the elastic force of spring 3, by
Both power determine the motion of plunger 2, so as to carry out pressure release to main oil gallery.However, the pressure limiting valve of this type, its end of plunger 2
Face is the horizontal plane of a finishing（Main oil gallery outlet can be blocked）, pressure limiting valve is during unlatching and closing, from main oil gallery
Fluid only produce powerful impulsive force between the end face of plunger 2, and the end face of plunger 2 does not have any buffer structure, therefore should
The pressure oscillation of the end face fluid of pressure limiting valve plunger 2 can be larger, and this can not only bring noise, and easily pressure limiting valve is produced rolling
It is dynamic, the performance of pressure limiting valve is influenceed, will also the service life of pressure limiting valve be influenceed for a long time.
The content of the invention
The technical problems to be solved by the invention, which are to provide a kind of pressure limiting valve, can slow down impulsive force of the fluid to plunger, reduce
The pressure oscillation of fluid around plunger, reduces operating noise, and its performance is stable, service life is long.
To achieve these goals, the present invention is adopted the following technical scheme that：Pressure limiting valve, including offer valve pocket valve body,
Plunger and spring in valve pocket, the spring one end connection plunger, the other end are fixed on valve pocket bottom, the valve body and opened
Provided with oil inlet and oil-out, the end face of the plunger towards oil inlet is provided with big round platform, and the big round platform is provided with roundlet
Platform.
Further, the diameter difference of the plunger end face and big round platform is 0.5mm and the diameter difference of small round platform is 12mm,
The discrepancy in elevation of the plunger and big round platform is 47mm and the discrepancy in elevation of small round platform is 50mm.
Further, the plunger is the tubular structure of one end open, and the valve pocket bottom is further fixed on closure, institute
Spring one end is stated in plunger, other end connection closure.
Further, in addition to regulating bolt and cover plate, the cover plate is arranged on body base, and the regulating bolt is passed through
Cover plate and both threaded connections are worn, and the end of the regulating bolt is contacted with closure, head end is located at outside cover plate, the sealing
The position covered in valve pocket is adjustable.
Preferably, it is provided between the cover plate and valve body between sealing gasket, and the closure and valve pocket side wall provided with O-shaped
Circle, the sealing gasket and O-ring can prevent the fluid in valve body from leaking.
The beneficial effects of the present invention are：A kind of this pressure limiting valve, its plunger end face is such a provided with big round platform and small round platform
Structure can make pressure limiting valve either during opening or closing, and oil inlet fluid is first to contact small round platform, big round platform,
It is plunger end face again, as a whole, the contact surface of fluid and plunger increases successively, effectively reduces between fluid and plunger
Instantaneous cushion effect, compared with prior art, fluid is easier smoothly to flow through from plunger surface, thus can greatly reduce herein
Pressure oscillation, reduces operating noise, and pressure limiting valve can be avoided to shake, it is ensured that the normal of pressure limiting valve is used, and is improved it and is used
Life-span, and the pressure limiting valve, when opening, the also function with secondary draining can further improve the steady of engine oil pressure
It is qualitative.
Brief description of the drawings
Fig. 1 is the profile of the pressure limiting valve of prior art；
Sectional views of the Fig. 2 for the pressure limiting valve in the embodiment of the present invention in off position；
Fig. 3 be the embodiment of the present invention in pressure limiting valve opening sectional view；
Fig. 4 is the profile of plunger in the embodiment of the present invention；
Fig. 5 is the dimensional structure diagram of plunger in the embodiment of the present invention.
Reference is：
1 --- valve body 101 --- valve pocket 2 --- plunger
201 --- big round platform 202 --- small round platform 3 --- springs
4 --- closure 5 --- regulating bolt 6 --- cover plates
7 --- sealing gasket 8 --- O-rings.
Embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to embodiment and accompanying drawing
It is bright, the content that embodiment is referred to not limitation of the invention.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position
Relation is put, the description present invention is for only for ease of and simplifies description, rather than indicate or imply that the device or element of meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection or the connection of two element internals, can
To be to be joined directly together, it can also be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of the term.
As shown in Figure 2-5, a kind of pressure limiting valve, including offer the valve body 1 and the plunger in valve pocket 101 of valve pocket 101
2 with spring 3, open up one and main oil gallery at the top of the valve body 1（Or pump discharge）The oil inlet of connection, valve body 1
Side opens up an oil-out（The oil-out can be connected with the oil duct towards oil sump, or the fluid of the oil-out is let out toward hair
In the transmission system of motivation）, the one end of spring 3 connection plunger 2, the other end are fixedly mounted on the bottom of valve pocket 101, the plunger
2 towards oil inlet end face be provided with big round platform 201, big round platform 201 be provided with small round platform 202, the big round platform 201 and roundlet
The side of platform 202 is in arc line shaped, and round platform 201, small round platform 202 and the center overlapping of axles of the three of plunger 2, the plunger 2 greatly
It is equal with the diameter of valve pocket 101 in the diameter of the top of valve pocket 101 and the end face of plunger 2.
The pressure limiting valve that above-mentioned embodiment is provided, is assemblied in the original state in lubricating oil pump（Namely state when closing）Such as
Shown in Fig. 2, plunger 2 blocks oil inlet, the fluid of oil inlet can be prevented to be flowed out from oil-out, with carrying for engine speed
Height, the oil pressure of oil inlet gradually increases, and when the hydraulic coupling of fluid is more than the elastic force of pressure limiting valve inner spring 3, plunger 2 is transported downwards
It is dynamic, also it is not very high due to just starting oil pressure, it is in small distance that spring 3 is compressed, therefore plunger 2 only moves down one section of very little
Distance, and now, the fluid of oil inlet forms first time draining from the gap outflow between big round platform 201 and valve pocket 101,
Play a part of finely tuning oil pressure, then the hydraulic coupling of main oil gallery further increases, and plunger 2 is moved further downward, when reaching most
During high hydraulic coupling, as shown in Figure 3（The state that pressure limiting valve is opened）, plunger 2 is complete to open the passage that oil inlet leads to oil-out, soon
Speed unloading fluid more than needed, makes engine oil pressure no more than the maximum of setting, plays safeguard protection effect；And the closing of pressure limiting valve
Process is：When starting rotating speed to reduce, plunger 2 is moved up under the rebound effect of spring 3, now, at first with oil inlet fluid
Contact is small round platform 202, next to that big round platform 201 and the end face of plunger 2.As can be seen here, the present embodiment provide pressure limiting valve without
By being that during unlatching or closing, oil inlet fluid is first to contact small round platform 202, big round platform 201, then is plunger 2
End face, as a whole, the contact surface of fluid and plunger 2 increase successively, effectively reduce instantaneous slow between fluid and plunger 2
Impulse force, compared with prior art, fluid are easier smoothly to flow through from the surface of plunger 2, thus can greatly reduce pressure herein
Fluctuation, reduces operating noise, and pressure limiting valve can be avoided to shake, it is ensured that the normal of pressure limiting valve is used, and improves its service life,
And from the foregoing, the pressure limiting valve that provides of the present embodiment is when opening, the also function with secondary draining can be further
Improve the stability of engine oil pressure.
Further, as shown in figure 4, a diameter of 30mm of the end face of the plunger 2, a height of 51mm, the big round platform 201 it is straight
Footpath is 29.5mm, a height of 4mm, a diameter of 18mm, a height of 1mm of the small round platform 202, from calculating, big round platform 201 and post
The diameter difference of 2 end faces is filled in for 0.5mm, discrepancy in elevation 47mm, and the end face of plunger 2 and the inwall blind-mate of valve body 1, namely big round platform
201 with a width of 0.25mm, a height of 4mm in the gap of the inwall of valve body 1, learnt by experiment, when big round platform 201 and the inwall of valve body 1 it
Between gap size be 0.25mm*4mm when, pressure limiting valve is more apparent to the fine setting effect of main oil gallery oil pressure；And the small diameter of round platform 202
Should be moderate with high size, it is too big or too it is small do not have significantly reduce resistance effect, herein, small round platform 202 it is straight
Footpath is that 18mm, a height of 1mm are optimal case.
In the manufacturing process of pressure limiting valve, because the profile of spring 3 is irregular and the space of valve pocket 101 is smaller, by spring 3
The technique being directly installed in valve pocket 101 can be more difficult, thus the problem of in order to solve to install inconvenience, further, such as Fig. 2 ~ Fig. 5
Shown, the pressure limiting valve also includes closure 4, and first spring 3 is arranged on closure 4, then closure 4 is arranged on into valve pocket 101
Bottom, because closure 4 is regular texture, therefore the technique being fixed in valve pocket 101 inside is simpler, can take weld or
The various ways such as interference fit, secondly, the plunger 2 are the tubular structure of one end open, and the top of the spring 3 is located at plunger
In 2.
Further, as shown in Figures 2 and 3, the pressure limiting valve also includes regulating bolt 5 and cover plate 6（Also it can use herein and valve
The valve of the bottom thread of chamber 101 connection is stifled to substitute cover plate 6）, the regulating bolt 5 can be hex bolts and be configured with nut, described
Cover plate 6 is arranged on the bottom of valve body 1, and the regulating bolt 5 runs through cover plate 6 and both threaded connections, and the end of the regulating bolt 5
End is contacted with closure 4（It is not attached to）, head end be located at cover plate 6 outside, position of the closure 4 in valve pocket 101 is adjustable.Typically
In the case of, before pressure limiting valve dispatches from the factory, staff will set position of the closure 4 in valve pocket 101 by regulating bolt 5
Put, when regulating bolt 5 turns clockwise, regulating bolt 5 promotes closure 4 to overcome the elastic force of spring 3 with respect to valve body 1 together
It is moved to the left, spring 3 is compressed, the elastic force increase of spring 3, when 5 rotate counterclockwise of regulating bolt, regulating bolt 5 is with respect to valve
Body 1 moves right, and closure 4 also moves right under the elastic force effect of spring 3, close while regulating bolt 5 is stopped the rotation
Capping 4 also stops movement, and now, spring 3 is upheld, and the elastic force of spring 3 reduces, it can be seen that, the position of closure 4 is different, bullet
Initial elastic force namely difference when spring 3 dispatches from the factory, but if pressure limiting valve operationally needs to change the situation of the elastic force of spring 3, work
Personnel can also be turned regulating bolt 5 by scene and solve problems, be brought not consequently, it is possible to eliminate dismounting pressure limiting valve
Just.
Preferably, as shown in Figures 2 and 3, sealing gasket 7 is set between the cover plate 6 and valve body 1, and described close
O-ring 8 is set between capping 4 and the side wall of valve pocket 101, and the sealing gasket 7 and O-ring 8 can be prevented outside the fluid in valve body 1
Let out.
Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with other manner,
Any obvious replacement is within protection scope of the present invention on the premise of not departing from the technical program design.
In order to allow those of ordinary skill in the art more easily to understand improvements of the present invention relative to prior art, this
Some accompanying drawings of invention and description have been simplified, and for the sake of clarity, present specification is omitted some other members
Element, those of ordinary skill in the art should be aware that these elements omitted also may make up present disclosure.
Claims (5)
1. a kind of pressure limiting valve, including offer valve pocket（101）Valve body（1）, located at valve pocket（101）Interior plunger（2）And spring
（3）, the spring（3）One end connects plunger（2）, the other end be fixed on valve pocket（101）Bottom, the valve body（1）On offer
Oil inlet and oil-out, it is characterised in that：The plunger（2）End face towards oil inlet is provided with big round platform（201）, it is described big
Round platform（201）It is provided with small round platform（202）.
2. pressure limiting valve according to claim 1, it is characterised in that：The plunger（2）End face and big round platform（201）Diameter
Difference is 0.5mm and small round platform（202）Diameter difference be 12mm, the plunger（2）With big round platform（201）The discrepancy in elevation for 47mm, with
Small round platform（202）The discrepancy in elevation be 50mm.
3. pressure limiting valve according to claim 2, it is characterised in that：The plunger（2）For the tubular structure of one end open, institute
State valve pocket（101）Bottom is further fixed on closure（4）, the spring（3）One end is located at plunger（2）Interior, other end connection sealing
Lid（4）.
4. pressure limiting valve according to claim 3, it is characterised in that：Also include regulating bolt（5）And cover plate（6）, the lid
Plate（6）Installed in valve body（1）Bottom, the regulating bolt（5）Through cover plate（6）And both threaded connections, and the regulation spiral shell
Bolt（5）End and closure（4）Contact, head end are located at cover plate（6）Outside, the closure（4）In valve pocket（101）Interior position
It is adjustable.
5. pressure limiting valve according to claim 4, it is characterised in that：The cover plate（6）With valve body（1）Between be provided with sealing gasket
（7）, and the closure（4）With valve pocket（101）O-ring is provided between the wall of side（8）, the sealing gasket（7）And O-ring（8）
Valve body can be prevented（1）Interior fluid leaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705274.4A CN107300029B (en) | 2017-08-17 | 2017-08-17 | Pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705274.4A CN107300029B (en) | 2017-08-17 | 2017-08-17 | Pressure limiting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107300029A true CN107300029A (en) | 2017-10-27 |
| CN107300029B CN107300029B (en) | 2023-05-05 |
Family
ID=60131865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710705274.4A Active CN107300029B (en) | 2017-08-17 | 2017-08-17 | Pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107300029B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019105282A (en) * | 2017-12-11 | 2019-06-27 | アイシン精機株式会社 | Relief valve structure |
| CN110185911A (en) * | 2019-07-05 | 2019-08-30 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve preventing plunger eccentric wear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110412Y (en) * | 2007-11-29 | 2008-09-03 | 段会强 | Fluid pressure reducing valve |
| CN201874636U (en) * | 2010-12-06 | 2011-06-22 | 潍柴动力股份有限公司 | Oil pressure limiting valve for internal combustion engine |
| CN103477133A (en) * | 2011-03-31 | 2013-12-25 | 麦格纳动力系有限公司 | Low gain pressure relief valve for a fluid pump |
| CN204852880U (en) * | 2015-07-15 | 2015-12-09 | 新乡市远航动力环控机械有限公司 | Plunger oil pump voltage limiting valve |
| CN204984854U (en) * | 2015-09-30 | 2016-01-20 | 安徽江淮汽车股份有限公司 | Oil pump and relief valve thereof |
| CN205190187U (en) * | 2015-12-04 | 2016-04-27 | 重庆长安汽车股份有限公司 | Oil pump relief valve |
| CN205824305U (en) * | 2016-07-26 | 2016-12-21 | 北京汽车动力总成有限公司 | A kind of lubricating oil pump pressure relief mechanism, lubricating oil pump and automobile |
| CN207049384U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | Pressure limiting valve |
-
2017
- 2017-08-17 CN CN201710705274.4A patent/CN107300029B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201110412Y (en) * | 2007-11-29 | 2008-09-03 | 段会强 | Fluid pressure reducing valve |
| CN201874636U (en) * | 2010-12-06 | 2011-06-22 | 潍柴动力股份有限公司 | Oil pressure limiting valve for internal combustion engine |
| CN103477133A (en) * | 2011-03-31 | 2013-12-25 | 麦格纳动力系有限公司 | Low gain pressure relief valve for a fluid pump |
| CN204852880U (en) * | 2015-07-15 | 2015-12-09 | 新乡市远航动力环控机械有限公司 | Plunger oil pump voltage limiting valve |
| CN204984854U (en) * | 2015-09-30 | 2016-01-20 | 安徽江淮汽车股份有限公司 | Oil pump and relief valve thereof |
| CN205190187U (en) * | 2015-12-04 | 2016-04-27 | 重庆长安汽车股份有限公司 | Oil pump relief valve |
| CN205824305U (en) * | 2016-07-26 | 2016-12-21 | 北京汽车动力总成有限公司 | A kind of lubricating oil pump pressure relief mechanism, lubricating oil pump and automobile |
| CN207049384U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | Pressure limiting valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019105282A (en) * | 2017-12-11 | 2019-06-27 | アイシン精機株式会社 | Relief valve structure |
| CN110185911A (en) * | 2019-07-05 | 2019-08-30 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve preventing plunger eccentric wear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107300029B (en) | 2023-05-05 |
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