CN103671320B - Electro-hydraulic control valve - Google Patents
Electro-hydraulic control valve Download PDFInfo
- Publication number
- CN103671320B CN103671320B CN201310428798.5A CN201310428798A CN103671320B CN 103671320 B CN103671320 B CN 103671320B CN 201310428798 A CN201310428798 A CN 201310428798A CN 103671320 B CN103671320 B CN 103671320B
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- Prior art keywords
- magnet valves
- pressure
- valve
- pressure chamber
- valves
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- 239000012530 fluid Substances 0.000 description 8
- 230000000875 corresponding Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002085 persistent Effects 0.000 description 1
Abstract
The invention discloses a kind of electro-hydraulic control valve, it includes valve element, and described valve element can shift along a first direction by means of the pressure in the first pressure chamber and shift in a second direction by means of the pressure in the second pressure chamber.First pressure chamber can be connected to high voltage supply device and low pressure feedway.Second pressure chamber can be connected to high voltage supply device and low pressure feedway.First magnet valves is connected to the first pressure chamber, and the second magnet valves is connected to the second pressure chamber.3rd magnet valves is connected to high voltage supply device and is connected to the first magnet valves and is connected to the second magnet valves.Present invention contemplates that offer one is the most reliable but also arranges more uncomplicated electro-hydraulic control valve than existing valve.To this end, the first magnet valves and the second magnet valves are three-way valve.
Description
Technical field
The present invention relates to a kind of electro-hydraulic control valve, described electro-hydraulic control valve includes valve unit
Part, this valve element can shift by the pressure in the first pressure chamber and in the first direction by second
Pressure in pressure chamber shifts in a second direction, and wherein the first pressure chamber can be connected to high voltage supply
Device and low pressure feedway, and wherein the second pressure chamber can be connected to high voltage supply device and low
Pressure feedway, and wherein the first magnet valves is connected to the first pressure chamber, the second magnet valves is connected to
Second pressure chamber, and wherein the 3rd magnet valves is connected to high voltage supply device and is connected to the first magnetic
Valve and the second magnet valves.
Background technology
This control valve is such as disclosed in DE 10 2,005 043 458 B4.Shown electronic liquid
Pressure control valve includes that the switching valve added, described additional switching valve are arranged in proportioning valve and two pipes
Between road, each pipeline leads to a pressure chamber.Proportioning valve allows to adjust from high voltage supply device
Pressure, switching valve is intended to guide to one of pressure chamber the described pressure from proportioning valve.Rely on
Which pressure chamber being supplied to the higher pressure from proportioning valve in, valve element will be in both direction
In a side move up until the balance that reaches between pressure and the power of spring.Each pressure
Power chamber is additionally coupled in two two magnetropism valves, and two of which two magnetropism valve all leads to low
Pressure feedway.
Hydraulic valve is arranged, often requires that control valve not only can manually be adjusted, and
And can also remotely be adjusted.For this purpose it is proposed, valve element depends on along valve element should move
Desired orientation and be subjected to pressure.Then, pressure can be kept until valve element has arrived at
Till desired locations.
This function can realize in many ways.It is possible, firstly, to two pressure chambers are connected to two
Each in individual magnet valves.For each pressure chamber, a magnet valves will be connected to high pressure and supply
To device, another magnet valves is connected to low pressure feedway.In order to move valve element, one
To impose higher by the magnet valves opening the correspondence leading to high voltage supply device after pressure chamber
Pressure.Meanwhile, another pressure chamber is by next by opening the corresponding valve leading to low pressure feedway
Impose lower pressure.The two valve is in open mode until valve element has arrived at desired locations
Till.
It is reliable that this valve is arranged, however it is necessary that four magnet valves and corresponding control parts.
Therefore, production cost is relatively high.
Only two magnet valves are used for realizing a kind of alternative method of above-mentioned functions simply,
Between the pressure chamber that each magnet valves is arranged in high voltage supply device and pressure chamber.Each pressure
Power chamber is connected to low pressure feedway followed by flow plug.In order to make valve element shift, magnetic
One of valve is opened.Afterwards, hydraulic fluid will flow to low pressure feedway, and impose to flow plug
Higher pressure.Also valve element will be made after described higher pressure to shift.
Such valve is arranged and is needed only to two magnet valves, therefore less expensive on manufacturing.
On the other hand, have lost a certain amount of hydraulic fluid so that valve element shifts, and keep valve element
Non-neutral gear position generally will cause losing the most a certain amount of hydraulic fluid consistently.
Another replacement scheme uses three magnet valves and a switching valve, as at DE 10 2005
Disclosed in 043 458 B4.This valve is arranged and is needed only to three magnet valves, but has pressure
The control obvious unmanageable shortcoming of switching valve.Such as, switching valve is made to switch to another from a position
Pressure difference needed for position is the least.And then, if proportioning valve is opened unintentionally, then lead to
Often by cause from high voltage supply device through switching valve to be open and at entopic two-way valve
One of stream.In this case, the less desirable deflection of valve element will be caused.This makes this valve
Layout is difficult to control to, and is therefore less desirable.
Summary of the invention
Therefore, being to provide a kind of electro-hydraulic control valve according to the task of the present invention, it is both reliable,
Arrange more uncomplicated than valve before again.
Above-mentioned task is that three-way valve solves by the first magnet valves and the second magnet valves.
By the first magnet valves and the second magnet valves are chosen to three-way valve, the first magnet valves and second
In pressure chamber one can be connected to high voltage supply device or be connected to by each in magnet valves
Low pressure feedway.3rd magnet valves can such as control the pressure from high voltage supply device.This
Sample, it is thus only necessary to three magnet valves, meanwhile, the loss of hydraulic fluid is arranged little than above-mentioned two valve
Much.Simultaneously, it is not necessary to insecure voltage-controlled switching valve.
In a preferred embodiment, the first magnet valves is connected to low pressure feedway by the first port, by
Second port is connected to the first pressure chamber, and is connected to the second magnet valves and the 3rd magnetic by the 3rd port
Property both valves.This embodiment allows the first magnet valves that the first pressure chamber is connected to low pressure feedway
Or it is connected to higher pressure feedway.Meanwhile, the 3rd port leads to the second magnet valves and the 3rd magnetic
Both valves, this removes the needs from the second magnet valves to the independent tubes of the 3rd magnet valves.By
Need to be connected to high voltage supply device in each only one pressure chamber, the most in this embodiment
Such independent tubes can be saved.
In another preferred embodiment, the second magnet valves is connected to low pressure feedway by the 4th port
With the 3rd magnet valves, fifth port it is connected to the second pressure chamber, and is connected by the 6th port
To the first magnet valves and the 3rd magnet valves.According to this embodiment, the first magnet valves and the second magnetic
Property valve can have the pipeline passing to the 3rd magnet valves again.Meanwhile, the second magnet valves also may be used
To have the pipeline leading to low pressure feedway with the 3rd magnet valves.If the 3rd magnet valves is threeway
Valve, then the latter is for instance it can be possible that favourable.This embodiment also reduces in the case of not losing function
The quantity of required pipeline.
In another preferred embodiment, the 3rd magnet valves is electromagnetic proportional valve.By using electromagnetism ratio
Example valve as the 3rd magnet valves, the pressure from high voltage supply device can be controlled more accurately and
Adjust.Electro-hydraulic control valve is better controled over by this permission.
In another preferred embodiment, the 3rd magnet valves has adjustable dutycycle.This valve can
To open and close in quick subsegment (subsection).Depend on the persistent period and be in
" open " or the ratio of " closedown " position, effective output pressure can be adjusted.
In an additional preferred embodiment, the 3rd magnet valves is three-way valve.This embodiment is the most permissible
The 3rd magnet valves is allowed also to use low pressure feedway to adjust the pressure from high voltage supply device.Depend on
Lai Yu applies, and can be simple three-way valve, as the first magnet valves and second after the 3rd magnet valves
Magnet valves or more expensive ratio three-way valve are such.
In a further preferred embodiment, entopic 3rd magnet valves it is in by low pressure supply dress
Put and be connected to the first magnet valves and the second magnet valves.Therefore, though the first magnet valves or second
Magnet valves is in unintentionally the open position of mistake, also will prevent sliding part from deflecting, because two pressures
Power chamber will only be only connected to low pressure feedway.
In another preferred embodiment, the 3rd magnet valves is connected to high voltage supply dress by the 7th port
Put, the 8th port be connected to the first magnet valves and the second magnet valves, and connected by the 9th port
It is connected to low pressure feedway and the second magnet valves.This embodiment allows to keep the only of smallest number
Standpipe road.
In further preferred embodiment, be in entopic first magnet valves by the first pressure chamber with
Low pressure feedway connects, and is in entopic second magnet valves and is supplied with low pressure by the second pressure chamber
Connect to device.These features will prevent from being opened unintentionally and by the first magnetic in the 3rd magnet valves
Valve and the second magnet valves be connected with high voltage supply device in the case of the deflection unintentionally of sliding part.
In this case, from the first magnet valves and the fluid road of the second magnet valves to the 3rd magnet valves
Footpath will be closed and the deflection not having less desirable sliding part occurred.
In another preferred embodiment, the first magnet valves, the second magnet valves and the 3rd magnet valves are all
It is spring-biased valve or spring valve.In such a case, it is possible to be readily selected three magnet valves
Normal position, it prevents the deflection unintentionally of sliding part, even if being in mistake at a valve
During open position.
Accompanying drawing explanation
The preferred embodiments of the present invention are explained in more detail with reference to the accompanying drawings at this.At accompanying drawing
In,
Fig. 1 illustrates according to the first embodiment of the present invention；
Fig. 2 illustrates according to the second embodiment of the present invention；
According to the third embodiment of the invention Fig. 3 illustrates；
Fig. 4 illustrates according to the fourth embodiment of the invention.
Detailed description of the invention
Fig. 1 illustrates electro-hydraulic control valve 1, and this electro-hydraulic control valve 1 includes into sliding part 2
The valve element of form, described sliding part 2 is arranged in the opening 3 of housing displacement.Slide
Part 2 can such as have rectangle or the cross section of circle and can open with this in a fluid tight manner
Groove or the flange of mouth are closely fit with.
Sliding part 2 is arranged between the first pressure chamber 4 and the second pressure chamber 5.First pressure chamber 4
In pressure put on the first end face 6 of sliding part 2.Correspondingly, the pressure in the second pressure chamber 5
Put on by force the second end face 7 of sliding part 2.Depend on the pressure reduction putting on end face 6,7, sliding
Moving part 2 can in two directions in a movement.
It addition, there is the layout of spring 8,9 in pressure chamber 4,5.Each spring 8,9 is only
It is only connected in end wall 10,11.Alternately, it is also possible to simply use and be connected to end
One spring of one of one of wall 10,11 and end face 6,7.
If the pressure in the such as first pressure chamber 4 is more than the pressure in the second pressure chamber 5 now,
As long as the power that pressure or this pressure provide exceedes the spring force of spring 9, sliding part 2 will move right
Dynamic.Spring 8 is in unpressed state in this case.
In order to adjust the pressure in pressure chamber 4,5, also provide for high voltage supply device 12, this high pressure
Feedway 12 can such as be connected to pump 13.Also providing for low pressure feedway 14, this low pressure supplies
Fluid reservoir 15 can be such as connected to device 14.
First pressure chamber 4 is connected to the first magnet valves 16.Second pressure chamber 5 is connected to the second magnetic
Property valve 17.High voltage supply device is connected to the 3rd magnet valves 18.This embodiment in the present invention
In, the first magnet valves 16 and the second magnet valves 17 are three-way valve, and the 3rd magnet valves is electromagnetism ratio
Example valve.
First magnet valves 16 includes leading to the first port 19 of low pressure feedway 14, leading to
Second port 20 of one pressure chamber 4 and lead to the second magnet valves 17 and the 3rd magnet valves 18 liang
3rd port 21 of person.
Second magnet valves 17 includes leading to low pressure feedway 14 and the 4th of the 3rd magnet valves 18 the
Port 22, lead to the fifth port 23 of the second pressure chamber 5 and lead to the first magnet valves 16 and
6th port 24 of three magnet valves 18.
3rd magnet valves 18 includes leading to the 7th port 25 of high voltage supply device 12, leading to
8th port 26 of both one magnet valves 16 and the second magnet valves 17 and lead to low pressure feedway
14 and second the 9th ports 27 both magnet valves 17.
First magnet valves 16 and the second magnet valves 17 are three-way valve, i.e. each logical among them
Often two in their three ports are connected with each other.They also are able to open and close independently
Their port.
In order to move sliding part 2, can be such as by opening port 20 and 21 and shutdown side at this
First magnet valves 16 is connected by mouth 19 with the first pressure chamber 4 and the 3rd magnet valves 18.With this
Meanwhile, can be by opening port 23 and 22 and the second magnet valves is connected by close port 24
To the second pressure chamber 5 and low pressure feedway 14.By high pressure from high pressure after 3rd magnet valves 18
Feedway 12 supplies to the first magnet valves 16 and the first pressure chamber 4.Second pressure chamber 5 will be through
It is connected to low pressure feedway 14 by the second magnet valves 17.Therefore, put on the first end face 6
Pressure will be above putting on the pressure on the second end face 7.This causes power to make sliding part 2 to the left
Mobile until the power (or pressure) that causes with the pressure acted on end face 6 of the spring force of spring 9
Till big.
3rd magnet valves 18 can allow to adjust between the first pressure chamber 4 and the second pressure chamber 5
Pressure reduction.So, the final position of sliding part 2 can be easier to be chosen.If the 3rd magnetic
Valve 18 keeps selected pressure, the position of sliding part 2 just can be kept.
Fig. 2 and 3 illustrates the alternative embodiment of the present invention.In these cases, the 3rd magnet valves
18 is three-way valve rather than electromagnetic proportional valve.In the case of figure 2, the 3rd magnet valves is bullet
(spring) three-way valve that spring loads, and the first magnet valves 16 and the second magnet valves 17 are not springs
Load.
Fig. 3 illustrates that all three magnet valves is all the embodiment of spring-loaded three-way valve.This has
The advantage that can use three identical valves.Embodiment according to Fig. 1 can allow sliding part 2
Position more accurately, but use electromagnetic proportional valve make the cost of this embodiment than Fig. 2 or 3
Shown in the embodiment of three simple three-way valve of use more expensive.Which embodiment is preferred
Of course depend upon described application.
Fig. 4 illustrates according to another embodiment of the present invention.It is similar to Fig. 3, all three magnet valves
It is all spring-loaded or spring valve, but in this case, the 3rd magnet valves 18 is electromagnetism ratio
Example valve.
Embodiment according to Fig. 3 and Fig. 4 have the advantage that all three magnet valves 16,
17,18 all in the normal position of each of which time, to the fluid path of high pressure feedway 12
Blocked.The improvement of this causing trouble protection, because in three magnet valves 16,17,18 one
The open position of mistake will not result in the less desirable deflection of sliding part 2.This be compared to
Another advantage of prior art disclosed in DE 10 2,005 043 458 B4.
Claims (9)
1. an electro-hydraulic control valve, including valve element, described valve element can be by means of the first pressure
Pressure in power chamber (4) shifts and along a first direction by means of the pressure in the second pressure chamber (5)
Shifting in a second direction, wherein the first pressure chamber (4) can be connected to high voltage supply device (12)
Be connected to low pressure feedway (14), and wherein the second pressure chamber (5) can be connected to high pressure supply
To device (12) be connected to low pressure feedway (14), and wherein the first magnet valves (16) is even
Being connected to the first pressure chamber (4), the second magnet valves (17) is connected to the second pressure chamber (5), and wherein
3rd magnet valves (18) is connected to high voltage supply device (12) and is connected to the first magnet valves (16)
And it is connected to the second magnet valves (17), it is characterised in that
First magnet valves (16) and the second magnet valves (17) are three-way valve, wherein the first magnet valves (16),
Second magnet valves (17) and the 3rd magnet valves (18) are all spring-biased valves.
Electro-hydraulic control valve the most according to claim 1, it is characterised in that the first magnet valves
(16) it is connected to low pressure feedway (14) by the first port (19), by the second port (20)
Be connected to the first pressure chamber (4) and by the 3rd port (21) be connected to the second magnet valves (17) and
Both 3rd magnet valves (18).
Electro-hydraulic control valve the most according to claim 1, it is characterised in that the second magnet valves
(17) it is connected to low pressure feedway (14) and the 3rd magnet valves (18) by the 4th port (22)
Both, be connected to the second pressure chamber (5) by fifth port (23) and be connected to the by the 6th port
Both one magnet valves (16) and the 3rd magnet valves (18).
Electro-hydraulic control valve the most according to claim 1, it is characterised in that the 3rd magnet valves
(18) it is electromagnetic proportional valve.
Electro-hydraulic control valve the most according to claim 4, it is characterised in that the 3rd magnet valves
There is adjustable dutycycle.
Electro-hydraulic control valve the most according to claim 1, it is characterised in that the 3rd magnet valves
(18) it is three-way valve.
Electro-hydraulic control valve the most according to claim 6, it is characterised in that be in normal bit
The 3rd magnet valves (18) put low pressure feedway (14) is connected to the first magnet valves (16) and
Both second magnet valves (17).
Electro-hydraulic control valve the most according to claim 6, it is characterised in that the 3rd magnet valves
It is connected to high voltage supply device (12) by the 7th port (25), the 8th port (26) is connected to
Both first magnet valves (16) and the second magnet valves (17), and be connected to by the 9th port (27)
Both low pressure feedway (14) and the second magnet valves (17).
9. according to the electro-hydraulic control valve according to any one of claim 1-8, it is characterised in that
It is in entopic first magnet valves (16) by the first pressure chamber (4) and low pressure feedway (14)
Connect, and be in entopic second magnet valves (17) by the second pressure chamber (5) and low pressure confession
Connect to device (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12006652.7A EP2711561B1 (en) | 2012-09-21 | 2012-09-21 | Electrohydraulic control valve arrangement |
| EP12006652.7 | 2012-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103671320A CN103671320A (en) | 2014-03-26 |
| CN103671320B true CN103671320B (en) | 2016-11-30 |
Family
ID=
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4870892A (en) * | 1988-02-16 | 1989-10-03 | Danfoss A/S | Control means for a hydraulic servomotor |
| US5313873A (en) * | 1991-10-12 | 1994-05-24 | Mercedes-Benz Ag | Device for controlling the flow of fluid to a fluid unit |
| DE19932326A1 (en) * | 1999-07-10 | 2001-01-11 | Mannesmann Rexroth Ag | Valve arrangement for pilot control of a first and a second hydraulically actuated directional valve |
| DE102005043458A1 (en) * | 2005-09-13 | 2007-03-15 | Sauer-Danfoss Aps | Electro-hydraulic control valve, has magnetic valves arranged in section between pressure chambers and low pressure connection, where wiring sections are connected with high pressure connection by bearing valve |
| CN101675252A (en) * | 2007-01-26 | 2010-03-17 | 沃尔沃建筑设备公司 | Hydraulic circuit for operating a tool |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4870892A (en) * | 1988-02-16 | 1989-10-03 | Danfoss A/S | Control means for a hydraulic servomotor |
| US5313873A (en) * | 1991-10-12 | 1994-05-24 | Mercedes-Benz Ag | Device for controlling the flow of fluid to a fluid unit |
| DE19932326A1 (en) * | 1999-07-10 | 2001-01-11 | Mannesmann Rexroth Ag | Valve arrangement for pilot control of a first and a second hydraulically actuated directional valve |
| DE102005043458A1 (en) * | 2005-09-13 | 2007-03-15 | Sauer-Danfoss Aps | Electro-hydraulic control valve, has magnetic valves arranged in section between pressure chambers and low pressure connection, where wiring sections are connected with high pressure connection by bearing valve |
| CN101675252A (en) * | 2007-01-26 | 2010-03-17 | 沃尔沃建筑设备公司 | Hydraulic circuit for operating a tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Fort Hood Applicant after: Danfoss Energy Systems Inc Address before: Fort Hood Applicant before: Sauer Danfoss Aps |
|
| CB02 | Change of applicant information |
Address after: Fort Hood Applicant after: Danfoss Power Solutions Co., Ltd. Address before: Fort Hood Applicant before: Danfoss Energy Systems Inc |
|
| GR01 | Patent grant |