CN106194317A - Pressure limiting valve - Google Patents
Pressure limiting valve Download PDFInfo
- Publication number
- CN106194317A CN106194317A CN201510217016.2A CN201510217016A CN106194317A CN 106194317 A CN106194317 A CN 106194317A CN 201510217016 A CN201510217016 A CN 201510217016A CN 106194317 A CN106194317 A CN 106194317A
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- Prior art keywords
- plunger
- oil duct
- oil
- pressure limiting
- guide frame
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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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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of pressure limiting valve, and described pressure limiting valve includes: valve body, elastic component and plunger, wherein, is provided with oil duct in valve body, and oil duct is connected with main oil gallery and back oil road respectively；One end of elastic component is connected with one end of described oil duct, and the other end of elastic component is connected with described plunger；Plunger is arranged in described oil duct, there is gap between plunger and described oil duct, and described plunger arranges the first protruding ring near the periphery of one end of main oil gallery, and the first protruding ring is in sealing contact with the sidewall of oil duct；Described plunger is towards arranging guide frame on the end face of described main oil gallery, and the sidewall contact of the side of described guide frame and described oil duct, and the side of described guide frame offers at least one drain tap, described drain tap connects with described oil duct.The pressure limiting valve of the present invention solves existing pressure limiting valve owing to plunger and valve body contact area are compared with causing greatly pressure limiting valve opening pressure accuracy relatively low and plunger and the poor technical problem causing plunger return clamping stagnation of valve body axiality.
Description
Technical field
The present invention relates to a kind of engine art, particularly to the pressure limiting valve of a kind of engine oil pump.
Background technology
Oil pressure limiting valve is a kind of valve body being able to maintain that in main oil gallery normal oil pressure, normally transports at electromotor
When turning, when oil pressure is too high (when main oil pressure exceedes regulation), too high oil pressure pressure can pass to limit
Pressure valve, makes pressure limiting valve open, and a part of oil in main oil gallery will flow back to oil sump or stream by pressure limiting valve
Carry out partial circulating in returning pump, play pressure release effect, thus lower the oil pressure of access to engine oil duct, maintain
Normal oil pressure in main oil gallery.
At present, oil pressure limiting valve many employings plunger type pressure limiting valve, as it is shown in figure 1, pressure limiting valve by valve body 10,
Plunger 20, pressure limiting spring 30 form, and plunger 20 is positioned at valve body 10, one end of pressure limiting spring 30 and plunger
20 are connected, and the base arranged in the other end of pressure limiting spring 30 and valve body 10 is connected, when main oil pressure not less than
During regulation, pressure limiting spring 30 is in retracted position, and now plunger 20 makes winner with the sealing function of valve body 10
Oil duct B and back oil road C is in non-connected state, when the oil pressure in main oil gallery B exceedes regulation, and pressure limiting bullet
Spring 30 is compressed, and plunger 20 moves to back oil road C under the effect of pressure limiting spring 30, when plunger 20 moves to
During back oil road C, the machine oil in main oil gallery B flows to back oil road C, and machine oil flows back to oil sump or pump from back oil road C
Inside carry out partial circulating, play pressure release effect.
But, in existing plunger type pressure limiting valve, plunger 20 and valve body 10 contact area are relatively big, cause plunger
Frictional force between 20 and valve body 10 is bigger so that the accuracy of pressure limiting valve opening pressure reduces, oil pressure
There is wave phenomenon in power, simultaneously as pressure limiting valve plunger 20 and valve body 10 contact area are relatively big, iron filings,
Carbon granules is easily stuck between plunger 20 and valve body 10, makes pressure limiting valve clamping stagnation, causes oil pressure too high or too low,
Electromotor is produced serious infringement, and, existing plunger type pressure limiting valve is due to mismachining tolerance, plunger
20 is poor with valve body 10 axiality, when plunger 20 return, as in figure 2 it is shown, owing to plunger 20 centering is poor,
Plunger 20 return clamping stagnation is easily caused in the position (as shown in dotted circle in Fig. 2) that oil duct is connected with back oil road C,
So cause engine oil pressure too low, occur seizing tile kilning phenomenon.
Summary of the invention
The present invention provides a kind of pressure limiting valve, solves existing pressure limiting valve due to plunger and valve body contact area
Compared with causing greatly pressure limiting valve opening pressure accuracy relatively low and plunger is with valve body axiality is poor causes plunger return
The technical problem of clamping stagnation.
The present invention provides a kind of pressure limiting valve, including: valve body, elastic component and plunger, wherein,
Being provided with oil duct in described valve body, described oil duct is connected with main oil gallery and back oil road respectively；
One end of described elastic component is connected with one end of described oil duct, and the other end of described elastic component is with described
Plunger is connected；
Described plunger is arranged in described oil duct, there is gap, and institute between described plunger and described oil duct
State plunger and the first protruding ring, described first protruding ring and institute are set near the periphery of one end of described main oil gallery
The sidewall stating oil duct is in sealing contact；
Described plunger arranges guide frame, the side of described guide frame on the end face of described main oil gallery
Face and the sidewall contact of described oil duct, described guide frame play the guiding role when to described plunger return,
And the side of described guide frame offers at least one drain tap, described drain tap connects with described oil duct.
In specific embodiments of the present invention, away from the other end of described first protruding ring on described plunger
Periphery arranges the second protruding ring, is zero clearance between described second protruding ring and the sidewall of described oil duct.
In specific embodiments of the present invention, described guide frame is hollow tubular body, described hollow tubular
The sidewall contact of the side of body and described oil duct, and at least one drain tap described is opened in described hollow pipe
Shape body is on the side of described first protruding ring.
In another embodiment, three drain taps are offered at the interval, side of described hollow tubular body.
In another embodiment, described drain tap is U-shaped drain tap.
The pressure limiting valve that the present invention provides, by plunger is arranged in described oil duct, and plunger and described oil
There is gap between road, the first protruding ring, institute are set near the periphery of one end of described main oil gallery at plunger
The sidewall stating the first protruding ring and described oil duct is in sealing contact so that plunger reduces with the contact area of valve body,
And then the frictional force between plunger and valve body is reduced, improve the accuracy of pressure limiting valve opening pressure,
Meanwhile, at plunger, guide frame, the side of described guide frame are set on the end face of described main oil gallery
The sidewall contact of face and described oil duct, and the side of described guide frame offers at least one drain tap,
In pressure leak process, after the first protruding ring of plunger slides into back oil road, the machine oil in main oil gallery passes through draining
Mouth enters back oil road and completes pressure leak process, and i.e. during pressure release, guide frame is constantly in oil duct and and oil duct
Keeping contact condition, such plunger is always maintained at Shaft alignment state in pressure leak process, therefore avoids plunger
First protruding ring clamping stagnation problem during return, achieve the timely return of plunger by guide frame, it is to avoid machine
The too low phenomenon occurring seizing tile kilning of oil pressure.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of pressure limiting valve in prior art；
Fig. 2 is operating diagram during pressure limiting valve pressure release in prior art；
Fig. 3 is the cross-sectional view that pressure limiting valve of the present invention is closed；
Fig. 4 is plunger and the schematic diagram of guide frame in Fig. 3；
Fig. 5 is cross-sectional view during pressure limiting valve pressure release of the present invention；
Fig. 6 is plunger and the another structural representation of guide frame in pressure limiting valve of the present invention；
Fig. 7 is the schematic front view of Fig. 6；
Fig. 8 is the schematic top plan view of Fig. 6.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, to help reader the most geographical
Solve the solution of the present invention and produced beneficial effect, but be not understood that to the present invention can embodiment
Any restriction with scope.
The pressure limiting valve that the present embodiment provides may be used for completing pressure release effect when oil (gas) presses through high.Figure
3 is the cross-sectional view that pressure limiting valve of the present invention is closed, and Fig. 4 is plunger and leading in Fig. 3
To the schematic diagram of structure；Fig. 5 is cross-sectional view during pressure limiting valve pressure release of the present invention, sees Fig. 3-5,
Pressure limiting valve includes: valve body 1, elastic component 2 and plunger 3, is provided with oil duct A, oil duct A respectively in valve body 1
Being connected with main oil gallery B and back oil road C, one end of elastic component 2 is connected with one end of oil duct A, specifically may be used
To be to arrange base in one end of oil duct A, one end of elastic component 2 is connected with base, elastic component 2 another
One end is connected with plunger 3, and plunger 3 is arranged in oil duct A, and in the present embodiment, main oil gallery B passes through post
Plug 3 slips in oil duct A disconnect with back oil road C or connect, and in the present embodiment, plunger 3 is in valve
In the oil duct A of body 1, in order to reduce the contact area between plunger 3 and valve body 1, in the present embodiment,
Gap is there is, i.e. between side and the sidewall of oil duct A of plunger 3 not between plunger 3 and oil duct A sidewall
Contact, for example, it is possible to by the diameter less than oil duct A that the diameter of plunger 3 is arranged is realized, this
In embodiment, in the case of discontiguous between the sidewall of plunger 3 and oil duct A, realize main oil gallery B
And separating between back oil road C, in the present embodiment, at plunger 3 near the periphery of one end of main oil gallery B
First protruding ring 4 is set, is in sealing contact between the first protruding ring 4 and the sidewall of oil duct A, i.e. plunger 3
Upper only the first protruding ring 4 contacts with valve body 1, the most compared with prior art, in the present invention, and plunger
3 greatly reduce with the contact area of valve body 1, and meanwhile, in the present embodiment, the first protruding ring 4 need to have
Sealing function, as it is shown on figure 3, when the oil pressure in main oil gallery B is not less than setting, pressure limiting valve is in
Closed mode, the first protruding ring 4 on plunger 3 stops that the machine oil in main oil gallery B flows in back oil road C,
Now, it is disconnected between main oil gallery B and back oil road C.
In the present embodiment, when the oil pressure in main oil gallery B exceedes setting, oil pressure actuated plunger 3 and
One protruding ring 4 slides to back oil road C, and elastic component 2 is compressed, when the first protruding ring 4 slides into oil return
During road C, the machine oil in main oil gallery B enters back oil road C by oil duct A, it is achieved pressure release effect, is letting out
During pressure, owing to there is gap between plunger 3 and oil duct A, such first protruding ring 4 is in the effect of oil pressure
Easily swinging down, often occur that plunger 3 misaligns phenomenon, such plunger 3 is at the work of elastic component 2
During with lower return, the first easy clamping stagnation of protruding ring 4 (sees figure in back oil road C and the oil duct A position that is connected
2), so make plunger 3 cannot return, in the present invention, in order to solve the problem of plunger 3 return clamping stagnation,
In the present embodiment, on the end face of main oil gallery B, guide frame 5 is set, i.e. such as Fig. 3 at plunger 3
Shown in, guide frame 5 is positioned at the top of the first protruding ring 4, in order to ensure plunger 3 centering when pressure release,
In the present embodiment, the side of guide frame 5 and the sidewall contact of oil duct A, but it should be recognized that by
In the first protruding ring 4, there is sealing function, so guide frame 5 side is indirect with the sidewall of oil duct A
Touch but can be with blow-by, and it should be noted that in order to reduce between guide frame 5 and oil duct A
Frictional force, on the premise of can will not causing plunger 3 to misalign ensureing guide frame 5 in oil duct A
Reduce as far as possible contacting between guide frame 5 and oil duct A sidewall, such as guide frame 5 and oil duct A it
Between can there is small gap, this gap will not make plunger 3 occur misaligning catching phenomenon.
In the present embodiment, in order to realize the guide frame 5 guide effect in pressure leak process, the present embodiment
In, at least one drain tap D is offered in the side of guide frame 5, and drain tap D connects with oil duct A, this
Sample, as it is shown in figure 5, when the oil pressure in main oil gallery B exceedes setting, oil pressure actuated plunger 3 is to returning
When oil duct C slides, when the first protruding ring 4 slides into back oil road C, due to the side of guide frame 5
Simply contact with the sidewall of oil duct A and do not seal, so the machine oil in main oil gallery B passes through guide frame
The drain tap D of 5 sides flows in back oil road C, reaches pressure release effect, when pressure release due to main oil gallery B
Middle oil pressure reduces so that guide frame 5 will not continue to slide to back oil road C, and guide frame 5 is whole
Pressure leak process will not completely disengage from the oil duct A above back oil road C, i.e. guide frame 5 have and oil always
The part of road A sidewall contact, and the contacting so that plunger 3 will not go out of guide frame 5 and oil duct A sidewall
The problem now misaligned, such first protruding ring 4 also will not when return clamping stagnation at back oil road C and oil duct
The position that A is connected, therefore, the present embodiment passes through guide frame 5, plunger 3 energy return in time, it is to avoid
Plunger 3 return clamping stagnation problem, in the present embodiment, it should be noted that the external diameter of the first protruding ring 4
Can be identical with the external diameter of guide frame 5, the first protruding ring 4 and guide frame 5 may be integrally formed,
Or, the first protruding ring 4, guide frame 5 and plunger 3 three may be integrally formed.
The pressure limiting valve that the present embodiment provides, by being arranged in described oil duct by plunger, and plunger is with described
There is gap between oil duct, the first protruding ring is set near the periphery of one end of main oil gallery at plunger, first
Protruding ring is in sealing contact with the sidewall of oil duct so that plunger reduces with the contact area of valve body, and then makes
Frictional force between plunger and valve body reduces, and improves the accuracy of pressure limiting valve opening pressure, and due to
There is gap between plunger and oil duct sidewall, reduce iron filings, that carbon granules is stuck between plunger and valve body is several
Rate, reduces the probability of pressure limiting valve clamping stagnation, improves electromotor functional reliability.Meanwhile, at plunger towards institute
State and guide frame is set on the end face of main oil gallery, the side of described guide frame and the sidewall of described oil duct
Contact, and at least one drain tap, in pressure leak process, plunger are offered in the side of described guide frame
After first protruding ring slides into back oil road, the machine oil in main oil gallery enters back oil road by drain tap and completes to let out
Pressing through journey, during pressure release, guide frame keeps contacting with oil duct sidewall always, and such guide frame will not be
Swinging in oil duct, and then ensure that plunger keeps Shaft alignment state in pressure leak process, such plunger returns
During position, the first protruding ring does not haves clamping stagnation problem, therefore achieves post by guide frame in the present embodiment
Fill in timely return, it is to avoid the engine oil pressure too low phenomenon occurring seizing tile kilning.
Fig. 6 is plunger and the another structural representation of guide frame in pressure limiting valve of the present invention, and Fig. 7 is Fig. 6
Schematic front view, Fig. 8 is the schematic top plan view of Fig. 6, on the basis of above-described embodiment, this enforcement
In example, as shown in figs 6-8, the other end (plunger 3 is away from one end of the first protruding ring 5) of plunger 3
Periphery the second protruding ring 6 is set, be zero clearance between the second protruding ring 6 and the sidewall of oil duct A, i.e.
Be in close contact between second protruding ring 6 and oil duct A, so, when guide frame 5 and oil duct A sidewall it
Between along with wearing clearance increase time, plunger 3 is likely to occur when pressure release and misaligns phenomenon, during return first
The easy clamping stagnation of protruding ring 5, and in the present embodiment, tight by between the second protruding ring 6 and oil duct A sidewall
Contiguity is touched, and when ensure that pressure release from the bottom of plunger 3, plunger 3 is constantly in Shaft alignment state, it is ensured that post
Plug 3 timely returns.
Further, as shown in Figure 6, guide frame 5 is hollow tubular body, the side of hollow tubular body
With the sidewall contact of oil duct A, and at least one drain tap D to be opened in hollow tubular body protruding near first
On the side of ring 5, in the present embodiment, when drain tap D is opened in hollow tubular body near the first protruding ring 5
Side on time, during pressure release, the contact portion between the sidewall of guide frame 5 and oil duct A is relatively big, this
Sample better ensures that plunger 3 is in Shaft alignment state, and then guarantees the timely return of plunger 3.Further,
As shown in Figure 6, three drain tap D are offered at the interval, side of hollow tubular body, and three drain tap D are permissible
For uncovered, such three drain tap D are directed to structure 5 and are divided into three parts, such guide frame 5 with
Contact area between oil duct A sidewall reduces, further, as it is shown in fig. 7, drain tap can be U
Type drain tap.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a pressure limiting valve, it is characterised in that including:
Valve body, elastic component and plunger, wherein,
Being provided with oil duct in described valve body, described oil duct is connected with main oil gallery and back oil road respectively；
One end of described elastic component is connected with one end of described oil duct, the other end of described elastic component and institute
State plunger to be connected；
Described plunger is arranged in described oil duct, there is gap between described plunger and described oil duct, and
Described plunger arranges the first protruding ring, described first protruding ring near the periphery of one end of described main oil gallery
It is in sealing contact with the sidewall of described oil duct；
Described plunger arranges guide frame on the end face of described main oil gallery, described guide frame
Side and the sidewall contact of described oil duct, described guide frame plays guiding when to described plunger return
Act on, and at least one drain tap, described drain tap and described oil are offered in the side of described guide frame
Road connects.
Pressure limiting valve the most according to claim 1, it is characterised in that away from described on described plunger
The periphery of the other end of the first protruding ring arranges the second protruding ring, described second protruding ring and described oil duct
Sidewall between be zero clearance.
Pressure limiting valve the most according to claim 1 and 2, it is characterised in that described guide frame is
Hollow tubular body, the sidewall contact of the side of described hollow tubular body and described oil duct, and described at least
One drain tap is opened in described hollow tubular body on the side of described first protruding ring.
Pressure limiting valve the most according to claim 3, it is characterised in that the side of described hollow tubular body
Three drain taps are offered at interval, face.
Pressure limiting valve the most according to claim 1, it is characterised in that described drain tap is U-shaped letting out
Hydraulic fluid port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217016.2A CN106194317A (en) | 2015-04-30 | 2015-04-30 | Pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217016.2A CN106194317A (en) | 2015-04-30 | 2015-04-30 | Pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106194317A true CN106194317A (en) | 2016-12-07 |
Family
ID=57458448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217016.2A Pending CN106194317A (en) | 2015-04-30 | 2015-04-30 | Pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194317A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882729A (en) * | 2019-04-08 | 2019-06-14 | 湖南机油泵股份有限公司 | A kind of gear type oil pump for the lubricating place being conveniently adjusted idle pulley neck bush |
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| CN201255019Y (en) * | 2008-06-13 | 2009-06-10 | 广西玉柴机器股份有限公司 | Limiting valve of engine |
| JP2011208651A (en) * | 2010-03-26 | 2011-10-20 | Aisin Seiki Co Ltd | Relief valve with relief pressure changing function |
| CN202391508U (en) * | 2011-12-26 | 2012-08-22 | 重庆科克发动机技术有限公司 | Novel oil pressure relief valve |
| CN202578816U (en) * | 2012-05-09 | 2012-12-05 | 安徽华菱汽车有限公司 | Engine and engine oil pump thereof |
| CN103712046A (en) * | 2013-12-23 | 2014-04-09 | 安徽江淮汽车股份有限公司 | Oil pump with improved pressure release valve |
| CN203731066U (en) * | 2013-10-25 | 2014-07-23 | 内蒙古欧意德发动机有限公司 | Valve spool and valve spool component of relief valve |
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2015
- 2015-04-30 CN CN201510217016.2A patent/CN106194317A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201255019Y (en) * | 2008-06-13 | 2009-06-10 | 广西玉柴机器股份有限公司 | Limiting valve of engine |
| JP2011208651A (en) * | 2010-03-26 | 2011-10-20 | Aisin Seiki Co Ltd | Relief valve with relief pressure changing function |
| CN202391508U (en) * | 2011-12-26 | 2012-08-22 | 重庆科克发动机技术有限公司 | Novel oil pressure relief valve |
| CN202578816U (en) * | 2012-05-09 | 2012-12-05 | 安徽华菱汽车有限公司 | Engine and engine oil pump thereof |
| CN203731066U (en) * | 2013-10-25 | 2014-07-23 | 内蒙古欧意德发动机有限公司 | Valve spool and valve spool component of relief valve |
| CN103712046A (en) * | 2013-12-23 | 2014-04-09 | 安徽江淮汽车股份有限公司 | Oil pump with improved pressure release valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882729A (en) * | 2019-04-08 | 2019-06-14 | 湖南机油泵股份有限公司 | A kind of gear type oil pump for the lubricating place being conveniently adjusted idle pulley neck bush |
| CN109882729B (en) * | 2019-04-08 | 2023-09-19 | 湖南机油泵股份有限公司 | Gear type oil pump convenient for adjusting lubrication position of idler shaft bushing |
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| PB01 | Publication | ||
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Application publication date: 20161207 |