CN105909844A - Proportional type proportional pressure reducing valve - Google Patents
Proportional type proportional pressure reducing valve Download PDFInfo
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- CN105909844A CN105909844A CN201610388344.3A CN201610388344A CN105909844A CN 105909844 A CN105909844 A CN 105909844A CN 201610388344 A CN201610388344 A CN 201610388344A CN 105909844 A CN105909844 A CN 105909844A
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- Prior art keywords
- valve
- main valve
- oil
- main
- pilot
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
Abstract
The invention discloses a proportional type proportional pressure reducing valve and belongs to the technical field of pressure reducing valves. A piezoelectric actuator is connected with a pilot valve element. The pilot valve element is matched with a pilot valve seat to form a pilot valve port. A main valve upper cavity is formed between a pilot valve oil supply device and the pilot valve seat. A main valve element damper is arranged in a main valve element. A shoulder of an upper section of the main valve element and the edge of a sinking and cutting groove in the upper portion of a valve body are matched to form an oil draining valve port, a shoulder of a lower section of the main valve element is matched with the edge of a sinking and cutting groove in the lower portion of the valve body to form an oil inlet valve port, and a shoulder of a middle section of the main valve element corresponds to a sinking and cutting groove in the middle portion of the valve body to form an output and flow guide part. The valve body is arranged in a valve block. An oil inlet and an oil draining port of the valve block communicate with the oil inlet valve port and the oil draining valve port correspondingly. A load opening of the valve block communicates with the sinking and cutting groove formed in the middle portion of the valve body, and a zero adjustment spring is arranged in a main valve lower cavity. Partial pressure of the pilot valve port and a throttling hole of the pilot valve oil supply device is used as a main valve element instruction, and the zero adjustment spring is used for expanding the pressure adjusting range. By means of the proportional type proportional pressure reducing valve, the output pressure of the valve and the input pressure of the valve can change proportionally.
Description
Technical field
The present invention relates to a kind of electro-hydraulic proportional reducing valve.Belong to air relief valve technical field.
Background technology
Existing proportional pressure-reducing valve, general adoption rate electric magnet is as controlling element, and output pressure is definite value, is compared by regulation
Example electric magnet controls output pressure size.In these valves, proportion electro-magnet produces a masterpiece proportional to control signal
Being used on spool, output hydraulic pressure pressure acts on the other end of spool, and when electromagnetic force and fluid pressure balance, proportional pressure-reducing valve reaches
Poised state.Therefore output pressure is proportional to electromagnetic force, therefore can control output hydraulic pressure pressure by electromagnetic force.
Owing to actuator response is fast, some investigators attempts the control unit using piezoelectric actuator as proportioning valve.But pressure
Motor-driven cylinder can only export the micro-displacement proportional to controlling voltage, and this displacement cannot be compared with the hydraulic coupling acted on spool
Control output displacement, it is impossible to control power output, it is impossible to be operated as using proportion electro-magnet.Existing scheme utilizes piezoelectricity
Actuator controls spool displacement, changes valve port opening, forms proportional throttle valve, and recycling pressure transducer measures output pressure,
The control to output pressure is realized by closed loop control.
Summary of the invention
It is an object of the invention to provide the proportion expression proportional pressure-reducing valve of a kind of output pressure change proportional to input pressure.
The present invention utilizes piezoelectric actuator as controlling element, and it, without using pressure transducer closed loop, can realize ratio pressure
Control.
So-called proportion expression refers to: output pressure becomes certain ratio with charge oil pressure, and this ratio is controlled rather than exports pressure
The absolute value of power is directly controlled.
Realizing above-mentioned purpose, the present invention adopts the technical scheme that:
The proportion expression proportional pressure-reducing valve of the present invention, including piezoelectric actuator, pilot valve, main valve, valve block and mounting bracket；Described
Pilot valve include guide's valve seat, pilot valve and pilot valve oil feeder；The middle part of guide's valve seat be from top to bottom provided with coaxial and
The centre bore communicated and bore；Described main valve includes main valve plug, valve body, main valve plug antivibrator and zeroing spring；
Described piezoelectric actuator is connected with the upper surface of valve body by mounting bracket, the lower surface of piezoelectric actuator and pilot valve
Upper surface connect, described pilot valve is arranged in the centre bore of guide's valve seat, the external cylindrical surface on pilot valve top and elder generation
The inner peripheral surface of the centre bore of guide valve seat coordinates, and the lower end of pilot valve cooperatively forms guide with the upper port of the bore of guide's valve seat
Valve valve port, top that the bottom of guide's valve seat is arranged in the central duct of valve body and the two removably connect, guide's valve seat interior
Portion is provided with the runner one and runner two being connected, and described runner one communicates with the centre bore of guide's valve seat, and the inside of valve body is provided with
The runner three communicated with described runner two；Described pilot valve oil feeder and main valve plug are from top to bottom arranged on the centre bore of valve body
In road, and pilot valve oil feeder is arranged on the lower section of guide's valve seat, and the region between pilot valve oil feeder and guide's valve seat is main valve
Epicoele, top that the cylindrical section of pilot valve oil feeder bottom is arranged in the medium pore canal of main valve plug and the two removably connect；Institute
Bottom that the cylindrical section on the top of the main valve plug antivibrator stated is arranged in the medium pore canal of main valve plug and the two removably connect；Institute
The outer wall of the main valve plug stated is provided with three sections of shoulders of upper, middle and lower, the epimere shoulder of main valve plug be arranged at above body wall on endoporus
Undercut groove limit cooperatively form oil extraction valve port, the hypomere shoulder of main valve plug and the undercut groove limit being arranged at below body wall on endoporus
Cooperatively forming oil-feed valve port, the stage casing shoulder of main valve plug is corresponding with the undercut groove being arranged in the middle part of body wall on endoporus；Described
The inside of valve block be provided with center cavity, in valve body is arranged on the center cavity of valve block and the two removably connects；On the lateral wall of valve block
Being respectively equipped with oil-in, load port and oil drain out, described oil-in is connected with oil-feed valve port, described oil drain out and oil extraction
Valve port is connected, and described load port is connected with the undercut groove being arranged in the middle part of body wall on endoporus；
When oil-feed valve port is in specified aperture, the undercut groove on endoporus in the middle part of the stage casing shoulder of main valve plug to described body wall
Spacing is consistent with oil-feed valve port opening；When oil extraction valve port is in specified aperture, the stage casing shoulder of main valve plug is to described valve body-side
In the middle part of wall, the undercut groove spacing on endoporus is consistent with oil extraction valve port opening；Having deep gouge on the hypomere shoulder of main valve plug, described is heavy
Groove is connected with the medium pore canal of main valve plug by the radial hole being arranged in main valve plug, and then connects with pilot valve oil feeder, deep gouge
Also communicate with the undercut groove being arranged at below body wall on endoporus；
The hypomere shoulder upper surface symmetry of main valve plug has two feedback inclined holes, under two described feedback inclined holes and main valve plug antivibrator
The throttling pore connection that end face is provided with；It is main valve cavity of resorption that the center cavity of valve block is positioned at main valve plug antivibrator lower zone, described tune
Zero spring is arranged on intracavity under main valve, and the upper end of zeroing spring is connected with the lower surface of main valve plug antivibrator, the lower end of zeroing spring
It is connected with main valve cavity of resorption bottom surface.
The invention have the benefit that
1. use piezoelectric actuator control pilot valve carry out dividing potential drop, it is not necessary to by pressure transducer measure, make valve oil-out pressure with
The proportional relation of inlet pressure.
2. use three sections of shoulder type main valve plugs, when the air relief valve of the present invention is in metered flow fuel feeding, oil-feed valve port opening with in
At section shoulder, aperture is identical, has good hydraulic power elimination effect, improves proportioning valve pressure controling precision.
3. use pilot valve oil feeder and main valve plug antivibrator, and be removably mounted on main valve plug, can be easy to according to use
Operating mode changes regulation, obtains optimum working performance.
5. use zeroing spring, eliminate the range of regulation making because piezoelectric actuator stroke is limited command pressure can not bring to zero and damage
Lose, make outlet pressure can from zero tune.
The feature of the present invention is in particular in following several respects:
1) have employed piezoelectric actuator as an electric electro-mechanical conversion element, the aperture of control pilot valve valve port so that pressure oil passes through
Certain pressure is formed at main valve epicoele, this pressure and confession oil pressure after the throttle orifice of pilot valve oil feeder and the dividing potential drop of pilot valve valve port
The ratio of power is determined by the driving voltage of piezoelectric actuator, and as the command signal of main valve.
The main valve upper cavity pressure that pilot valve is determined is determined by following formula
In formula: pcFor main valve upper cavity pressure；
Cd1Discharge coefficient for orifices for pilot valve oil feeder；
A1Throttle orifice area of passage for pilot valve oil feeder；
Cd2For pilot valve valve port flow coefficient；
A2For pilot valve valve port area of passage；
psFor charge oil pressure.
The aperture that pilot valve area of passage is controlled by piezoelectric actuator determines.When the bore area of guide valve seat is less in the ban, negligible
The hydraulic coupling impact on piezoelectric actuator aperture, it may be assumed that
A2=π dkxu sinα (2)
In formula: d is the bore diameter of guide's valve seat；
kxFor piezoelectric actuator voltage-displacement coefficient；
U is that piezoelectric actuator controls voltage；
α is the semi-cone angle of the conical head of pilot valve.
The effect of main valve plug lower end has outlet oil pressure, and according to main valve plug equilibrium equation, available output pressure is:
In formula: poFor output pressure；
K is main valve plug bottom zeroing spring rate；
x0For main valve plug bottom zeroing spring pre compressed magnitude；
FsFor acting on the steady-state fluid force on main valve plug；
AcFor main valve plug upper surface area (the upper and lower end face area of main valve plug is identical).
2) the pilot valve oil feeder (for separate type oil feeder) that the employing of pilot valve fuel feeding is arranged on main valve plug, compact conformation, again
Can change as required, it is achieved different pore size fuel feeding.Change the aperture of pilot valve oil feeder, thus it is possible to vary the regulation of pilot pressure
Scope and the response speed of main valve.
3) there is the main valve plug structure of three sections of shoulders of stage casing shoulder, reduce the hydraulic power of effect on main valve plug, improve control accuracy.
By formula (3) it can be seen that hydraulic power FsOutput pressure is had an impact.For controlling its influence degree, need to take measures to subtract
Little hydraulic power size.
Main valve plug in this structure has the distance between stage casing shoulder, and three sections of shoulders of upper, middle and lower when making metered flow, main valve
On core, equal with throttling limit aperture at load port (i.e. the stage casing shoulder of main valve plug is to interior in the middle part of body wall for oil-feed port throttling limit aperture
Undercut groove spacing on hole is consistent with oil-feed valve port opening), now the liquid stream between epimere shoulder and hypomere shoulder has immediate
Axial velocity, thus axial momentum difference is minimum, has best flow force compensation effect.
4) the zeroing spring of main valve plug lower end, make output pressure and charge oil pressure ratio can from zero tune.
According to formula (1), due to A2Can not be infinitely great, the therefore pressure p of main valve epicoelecThere is a minimum more than zero, this
Main valve output pressure is made also to have a minimum higher than zero.To this end, the present invention increases a zeroing spring in main valve plug lower end.
This zeroing spring is with the difference of standard reset spring: have bigger initial compression amount, makes owing to the change of main valve plug aperture is led
This zeroing spring force change caused is less, so that its zeroing effect is stable.
5) the separate type antivibrator (namely main valve plug antivibrator) being installed on main valve plug.The damping hole of main valve plug antivibrator is (also
I.e. throttling pore) size determines damping power, and then determines response stability and the speed of main valve.During loading condition difference,
Main damping valve device is required difference.Main valve plug antivibrator in the present invention can be replaced easily, with making of satisfied different operating mode
With requiring and easy to process.
6) simple and compact for structure, change parts convenient.Pilot valve oil feeder and main valve plug antivibrator, valve body it is integrated with on main valve plug
On not set jump ring spacing, and limit function is placed on valve block, spool can skid off smoothly.This kind of mode can the most more
Change zeroing spring, main valve plug antivibrator and pilot valve oil feeder.
Accompanying drawing explanation
Fig. 1 is the front view of the proportion expression proportional pressure-reducing valve of the present invention；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the partial enlarged drawing at Figure 1A.
In figure: piezoelectric actuator 1, connecting bolt 2, guide's valve seat 3, centre bore 3-1, bore 3-2, pilot valve 4, cone
Shape head 4-1, pilot valve oil feeder 5, the throttle orifice 5-1 of pilot valve oil feeder 5, valve block 6, oil-in 6-1, load port 6-2,
Oil drain out 6-3, the interior shoulder end face 6-4 of valve block 6, main valve plug 7, medium pore canal 7-1, epimere shoulder 7-2, hypomere shoulder 7-3,
Deep gouge 7-3-1, stage casing shoulder 7-4, radial hole 7-5, feedback inclined hole 7-6, valve body 8, central duct 8-1, top endoporus 8-2,
Lower section endoporus 8-3, middle part endoporus 8-4, main valve plug antivibrator 9, throttling pore 9-1, zeroing spring 10, mounting bracket 11,
Main valve epicoele 12, main valve cavity of resorption 13, sealing ring 1, sealing ring 2 15, sealing ring 3 16, sealing ring 4 17, sealing ring
5 18, runner one y1, runner two y2, runner three y3.
Detailed description of the invention:
Detailed description of the invention one: as shown in Figure 1 to 4, a kind of proportion expression proportional pressure-reducing valve, including piezoelectric actuator 1, guide
Valve, main valve, valve block 6 and mounting bracket 11；Described pilot valve includes guide's valve seat 3, pilot valve 4 and pilot valve fuel feeding
Device 5；The middle part of guide's valve seat 3 is from top to bottom provided with centre bore 3-1 that is coaxial and that communicate and bore 3-2, described main valve bag
Include main valve plug 7, valve body 8, main valve plug antivibrator 9 and zeroing spring 10；
Described piezoelectric actuator 1 is connected with the upper surface of valve body 8 by mounting bracket 11, the lower surface of piezoelectric actuator 1 and
(piezoelectric actuator 1 directly acts in pilot valve 4, makes in upper surface (by the connecting bolt 2) connection of pilot valve 4
Pilot valve 4 produces displacement), described pilot valve 4 is arranged in the centre bore 3-1 of guide's valve seat 3, in pilot valve 4
The external cylindrical surface in portion coordinate with the inner peripheral surface of the centre bore 3-1 of guide's valve seat 3 (form guide effect to pilot valve 4,
Improve the stability of pilot valve 4), the lower end (for conical head 4-1) of pilot valve 4 and bore 3-2 of guide's valve seat 3
Upper port cooperatively forms pilot valve valve port, and the bottom of guide's valve seat 3 is arranged on the top in central duct 8-1 of valve body 8 and two
Person (passing through screw thread) removably connects, and the inside of guide's valve seat 3 is provided with runner one y1 being connected and runner two y2, described
Runner one y1 communicate with the centre bore 3-1 of guide's valve seat 3, the inside of valve body 8 is provided with and communicates with described runner two y2
Runner three y3；Described pilot valve oil feeder 5 and main valve plug 7 are from top to bottom arranged in central duct 8-1 of valve body 8, and
Pilot valve oil feeder 5 is arranged on the lower section of guide's valve seat 3, and the region between pilot valve oil feeder 5 and guide's valve seat 3 is main valve
Epicoele 12, the cylindrical section of pilot valve oil feeder 5 bottom is arranged on the top in the medium pore canal 7-1 of main valve plug 7 and the two is (logical
Cross screw thread) removably connect；The cylindrical section on described main valve plug antivibrator 9 top is arranged on the medium pore canal 7-1 of main valve plug 7
Interior bottom and the two (passing through screw thread) removably connect；The outer wall of described main valve plug 7 is provided with three sections of shoulders of upper, middle and lower,
The epimere shoulder 7-2 of main valve plug 7 cooperatively forms oil extraction valve port with the undercut groove limit being arranged at above valve body 8 sidewall on endoporus 8-2,
The hypomere shoulder 7-3 of main valve plug 7 cooperatively forms oil-feed valve port with the undercut groove limit being arranged at below valve body 8 sidewall on endoporus 8-3,
The stage casing shoulder 7-4 of main valve plug 7 is corresponding with the undercut groove being arranged in the middle part of valve body 8 sidewall on endoporus 8-4, forms output and leads
Stream；The inside of described valve block 6 is provided with center cavity, in valve body 8 is arranged on the center cavity of valve block 6 and the two detachably (passes through
Screw thread) connect；Oil-in 6-1, load port 6-2 and oil drain out 6-3, described oil-feed it is respectively equipped with on the lateral wall of valve block 6
Mouthful 6-1 is connected with oil-feed valve port, and described oil drain out 6-3 is connected with oil extraction valve port, described load port 6-2 be arranged at
In the middle part of valve body 8 sidewall, the undercut groove on endoporus 8-4 is connected；
When oil-feed valve port is in specified aperture, endoporus 8-4 in the middle part of the stage casing shoulder 7-4 of main valve plug 7 to described valve body 8 sidewall
On undercut groove spacing consistent with oil-feed valve port opening；When oil extraction valve port is in specified aperture, the stage casing shoulder 7-4 of main valve plug 7
In the middle part of described valve body 8 sidewall, the undercut groove spacing on endoporus 8-4 is consistent with oil extraction valve port opening (makes in primary spools 7
Section shoulder 7-4 also with valve body 8 sidewall in the middle part of undercut groove on endoporus 8-4 form certain throttling action, act primarily as liquid stream and flow out and lead
To effect)；Having deep gouge 7-3-1 on the hypomere shoulder 7-3 of main valve plug 7, described deep gouge 7-3-1 is by being arranged on main valve plug 7
Interior radial hole 7-5 connects with the medium pore canal 7-1 of main valve plug 7, and then connects (oil supply pressure oil with pilot valve oil feeder 5
Can be to pilot valve oil feeder 5 fuel feeding), deep gouge 7-3-1 also with the undercut groove phase being arranged at below valve body 8 sidewall on endoporus 8-3
Logical；
The hypomere shoulder 7-3 upper surface symmetry of main valve plug 7 have two feedback inclined hole 7-6, described two feedback inclined hole 7-6 with
(load port 6-2 pressure is introduced by these two feedback inclined hole 7-6 in the throttling pore 9-1 connection that main valve plug antivibrator 9 lower surface is provided with
To main valve plug antivibrator 9, then it is incorporated into main valve plug 7 lower surface by throttling pore 9-1 on main valve plug antivibrator 9, is formed out
Mouth pressure feeds back)；It is main valve cavity of resorption 13 that the center cavity of valve block 6 is positioned at main valve plug antivibrator 9 lower zone, described zeroing bullet
Spring 10 is arranged in main valve cavity of resorption 13, and the upper end of zeroing spring 10 is connected with the lower surface of main valve plug antivibrator 9, and return to zero spring
The lower end of 10 is connected with main valve cavity of resorption 13 bottom surface.
The inside of guide's valve seat 3 is provided with runner one y1 being connected and runner two y2, and the fluid making pilot valve overflow passes through runner
One y1 and runner two y2 flows to runner three y3 on valve body 8, then flows to oil drain out 6-3.
Pilot valve oil feeder 5 is threadedly attached in main valve plug 7 upper end, is provided with end face seal, stops the leakage stream by screw thread
Amount, it is to avoid affect pilot control dividing potential drop.
Present embodiment utilizes the throttle orifice 5-1 dividing potential drop of pilot valve valve port and pilot valve oil feeder 5 to instruct as main valve plug 7, profit
With zeroing spring 10 broad voltage regulation range.
Detailed description of the invention two: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
It is machined with the closure gasket groove one for preventing fluid from leaking on the external cylindrical surface (also referred to as guide section) on pilot valve 4 top, described
Closure gasket groove one in be provided with sealing ring 1.
Detailed description of the invention three: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
It is machined with the closure gasket groove two for preventing fluid from leaking on the outer circumference surface of guide's valve seat 3, arranges in described closure gasket groove two
There is sealing ring 2 15.
Detailed description of the invention four: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
Pilot valve oil feeder 5 lower surface corresponding with the upper surface of main valve plug 7 is provided with closure gasket groove three, described closure gasket groove three
Inside it is provided with sealing ring 3 16 (end face seal stops the leakage flow by screw thread, it is to avoid affect pilot control dividing potential drop).
Detailed description of the invention five: as shown in Fig. 1 and Fig. 4, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one,
The width of the described deep gouge 7-3-1 diameter (beneficially reducing axial dimension) more than radial hole 7-5.
Detailed description of the invention six: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
Main valve plug antivibrator 9 upper surface corresponding with the lower surface of main valve plug 7 is provided with closure gasket groove four, described closure gasket groove four
Inside it is provided with sealing ring 4 17.Sealing ring is i.e. used to seal between main valve plug antivibrator 9 and main valve plug 7 lower surface, it is ensured that feedback
Fluid, all through throttling pore 9-1 of main valve plug antivibrator 9, makes damping characteristic more controlled.
Detailed description of the invention seven: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
Valve body 8 excircle side is provided with multiple closure gasket groove five, is provided with a sealing ring five in each described closure gasket groove five
18.For isolating fuel feeding, load-side, oil return, feedback oil and leaking.
Detailed description of the invention eight: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
Being arranged over interior shoulder end face in central duct 8-1 of valve body 8, the upper end of described guide's valve seat 3 is provided with boss, valve body 8
The lower surface of interior shoulder end face and the boss of guide's valve seat 3 be adjacent to mutually.For axially location.
Detailed description of the invention nine: as it is shown in figure 1, a kind of proportion expression proportional pressure-reducing valve described in detailed description of the invention one, described
Guide's valve seat 3 in main valve plug 7 up dependence valve body 8 limits upper limit by row position, in being provided with in the center cavity of described valve block 6
Shoulder end face 6-4, the interior shoulder end face 6-4 of valve block 6 are arranged in main valve cavity of resorption 13, main valve plug 7 descending dependence valve block 6
Interior shoulder end face 6-4 limits lower limit by row position.
Operation principle: with reference to Fig. 1～Fig. 4；During zero-bit, to oil-in 6-1 input pressure fluid, pressure oil liquid is through oil-feed valve port
With in the medium pore canal 7-1 that radial hole 7-5 enters main valve plug 7, through the pilot valve oil feeder 5 being installed on main valve plug 7 upper end
Enter main valve epicoele 12, then flow to oil extraction through runner three y3 of pilot valve valve port, runner one y1, runner two y2 and valve body 8
Mouth 6-3.
Pilot valve valve port opening is controlled by piezoelectric actuator 1, the throttling action formed at this and the throttle orifice of pilot valve oil feeder 5
The throttling action of 5-1 determines the oil liquid pressure of main valve epicoele 12.This pressure becomes the command pressure of main valve plug 7.
For narration simplicity, below ignore hydraulic power frictional force etc. and act on the minor forces on main valve plug 7.If oil-feed valve port time initial
Closing, load port 6-2 pressure is zero, then load port 6-2 pressure is by a pair feedback inclined hole 7-6 and main valve plug on main valve plug 7
Throttling pore 9-1 of antivibrator 9 enters main valve cavity of resorption 13, and the feedback pressure formed also is zero.So main valve plug 7 is in instruction
Pressure moves downward under promoting, and oil-feed valve port is opened, and pressure oil liquid flows to load port 6-2 from oil-in 6-1, and at load port
Set up output pressure at 6-2, then feedback pressure also increases.When command pressure, feedback pressure and zeroing spring 10 power reach
During to balance, main valve plug 7 stop motion, it is maintained on this equilbrium position, oil drain out 6-3 pressure is controlled.
If because certain reason causes oil drain out 6-3 pressure to change, as load flow reduces, oil drain out 6-3 pressure is caused to uprise,
Then feedback pressure uprises, then main valve plug 7 is suffered makes a concerted effort the most upwards, and main valve plug 7 will move upward, and turns down oil-feed valve port, reduction to
The fuel feeding of load port 6-2, then load port 6-2 pressure declines, until again reaching balance.
Claims (9)
1. a proportion expression proportional pressure-reducing valve, including piezoelectric actuator (1), pilot valve, main valve, valve block (6) and mounting bracket
11；It is characterized in that: described pilot valve includes guide's valve seat (3), pilot valve (4) and pilot valve oil feeder (5)；First
The middle part of guide valve seat (3) is from top to bottom provided with centre bore (3-1) that is coaxial and that communicate and bore (3-2)；Described main valve
Including main valve plug (7), valve body (8), main valve plug antivibrator (9) and zeroing spring (10)；
Described piezoelectric actuator (1) is connected with the upper surface of valve body (8) by mounting bracket (11), piezoelectric actuator (1)
Lower surface be connected with the upper surface of pilot valve (4), described pilot valve (4) is arranged on the center of guide's valve seat (3)
In hole (3-1), the inner peripheral surface of the centre bore (3-1) of the external cylindrical surface on pilot valve (4) top and guide's valve seat (3)
Coordinating, the lower end of pilot valve (4) cooperatively forms pilot valve valve port with the upper port of the bore (3-2) of guide's valve seat (3),
The bottom of guide's valve seat (3) is arranged on the top in the central duct (8-1) of valve body (8) and the two removably connects, guide
The inside of valve seat (3) is provided with the runner one (y1) and runner two (y2) being connected, described runner one (y1) and pilot valve
The centre bore (3-1) of seat (3) communicates, and the inside of valve body (8) is provided with the runner three (y3) communicated with described runner two (y2)；
Described pilot valve oil feeder (5) and main valve plug (7) are from top to bottom arranged in the central duct (8-1) of valve body (8),
And pilot valve oil feeder (5) is arranged on the lower section of guide's valve seat (3), pilot valve oil feeder (5) and guide's valve seat (3) it
Between region be main valve epicoele (12), the cylindrical section of pilot valve oil feeder (5) bottom is arranged on the medium pore canal of main valve plug (7)
(7-1) top in and the two removably connect；The cylindrical section on the top of described main valve plug antivibrator (9) is arranged on main valve
Bottom in the medium pore canal (7-1) of core (7) and the two removably connect；The outer wall of described main valve plug (7) is provided with
In lower three sections of shoulders, the epimere shoulder (7-2) of main valve plug (7) be arranged at above valve body (8) sidewall on endoporus (8-2)
Undercut groove limit cooperatively form oil extraction valve port, the hypomere shoulder (7-3) of main valve plug (7) be arranged at below valve body (8) sidewall
Undercut groove limit on endoporus (8-3) cooperatively forms oil-feed valve port, the stage casing shoulder (7-4) of main valve plug (7) be arranged at valve body
(8) in the middle part of sidewall, the undercut groove on endoporus (8-4) is corresponding；The inside of described valve block (6) is provided with center cavity, valve body (8)
In being arranged on the center cavity of valve block (6) and the two removably connects；Be respectively equipped with on the lateral wall of valve block (6) oil-in (6-1),
Load port (6-2) and oil drain out (6-3), described oil-in (6-1) is connected with oil-feed valve port, described oil drain out (6-3)
Being connected with oil extraction valve port, described load port (6-2) heavy cuts be arranged in the middle part of valve body (8) sidewall on endoporus (8-4)
Groove is connected；
When oil-feed valve port is in specified aperture, in the stage casing shoulder (7-4) of main valve plug (7) to described valve body (8) sidewall
Undercut groove spacing on portion's endoporus (8-4) is consistent with oil-feed valve port opening；When oil extraction valve port is in specified aperture, main valve plug (7)
Stage casing shoulder (7-4) to the undercut groove spacing on endoporus (8-4) in the middle part of the most described valve body (8) sidewall and oil extraction valve port opening
Unanimously；Having deep gouge (7-3-1) on the hypomere shoulder (7-3) of main valve plug (7), described deep gouge (7-3-1) is by arranging
Radial hole (7-5) in main valve plug (7) connects with the medium pore canal (7-1) of main valve plug (7), and then supplies with pilot valve
Oil device (5) connection, deep gouge (7-3-1) also communicates with the undercut groove being arranged at below valve body (8) sidewall on endoporus (8-3)；
Hypomere shoulder (7-3) the upper surface symmetry of main valve plug (7) has two feedbacks inclined hole (7-6), two described feedbacks
The throttling pore (9-1) that inclined hole (7-6) is provided with main valve plug antivibrator (9) lower surface connects；The center cavity of valve block (6)
Being positioned at main valve plug antivibrator (9) lower zone is main valve cavity of resorption (13), and described zeroing spring (10) is arranged on main valve cavity of resorption
(13) in, the upper end of zeroing spring (10) is connected with the lower surface of main valve plug antivibrator (9), under zeroing spring (10)
End is connected with main valve cavity of resorption (13) bottom surface.
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described pilot valve (4)
It is machined with the closure gasket groove one for preventing fluid from leaking on the external cylindrical surface on top, in described closure gasket groove one, is provided with sealing
Circle one (14).
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described guide's valve seat (3)
Outer circumference surface on be also machined with the closure gasket groove two for preventing fluid from leaking, be provided with sealing ring in described closure gasket groove two
Two (15).
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described pilot valve oil feeder (5)
The lower surface corresponding with the upper surface of main valve plug (7) is provided with closure gasket groove three, is provided with sealing in described closure gasket groove three
Circle three (16).
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described deep gouge (7-3-1)
Width is more than the diameter of radial hole (7-5).
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described main valve plug antivibrator (9)
The upper surface corresponding with the lower surface of main valve plug (7) is provided with closure gasket groove four, is provided with sealing in described closure gasket groove four
Circle four (17).
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: described valve body (8) cylindrical
All sides are provided with multiple closure gasket groove five, are provided with a sealing ring five (18) in each described closure gasket groove five.
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: in described valve body (8)
Being arranged over interior shoulder end face in central hole road (8-1), the upper end of described guide's valve seat (3) is provided with boss, valve body (8)
The lower surface of interior shoulder end face and the boss of guide's valve seat (3) be adjacent to mutually.
A kind of proportion expression proportional pressure-reducing valve the most according to claim 1, it is characterised in that: on described main valve plug (7)
Row relies on limit by row position in guide's valve seat (3) restriction in valve body (8), is provided with interior in the center cavity of described valve block (6)
Shoulder end face (6-4), the interior shoulder end face (6-4) of valve block (6) is arranged in main valve cavity of resorption (13), and main valve plug (7) is descending
The interior shoulder end face (6-4) relying on valve block (6) limits lower limit by row position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388344.3A CN105909844B (en) | 2016-06-02 | 2016-06-02 | Proportion expression proportional pressure-reducing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610388344.3A CN105909844B (en) | 2016-06-02 | 2016-06-02 | Proportion expression proportional pressure-reducing valve |
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| Publication Number | Publication Date |
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| CN105909844A true CN105909844A (en) | 2016-08-31 |
| CN105909844B CN105909844B (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610388344.3A Active CN105909844B (en) | 2016-06-02 | 2016-06-02 | Proportion expression proportional pressure-reducing valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289191A (en) * | 2017-07-18 | 2017-10-24 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of valve core structure of adjustable output gain |
| CN109707886A (en) * | 2019-01-11 | 2019-05-03 | 北京蓝箭空间科技有限公司 | Two-stage guide's pressure reducer |
| CN109798270A (en) * | 2019-02-25 | 2019-05-24 | 哈尔滨工业大学 | Multi-modal energy-saving servo actuator and the multi-modal energy-efficient method of realization |
| CN111853099A (en) * | 2020-07-13 | 2020-10-30 | 哈尔滨工业大学 | Moving-coil type two-position three-way high-speed switch valve for vehicle |
| CN112503042A (en) * | 2020-09-14 | 2021-03-16 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
| CN115750902A (en) * | 2022-11-29 | 2023-03-07 | 富阳通力机械制造有限公司 | Two-dimensional electro-hydraulic proportional valve manual unloading structure for quick self-locking jack |
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| CN204099328U (en) * | 2014-08-12 | 2015-01-14 | 徐工集团工程机械股份有限公司 | A kind of guide device of proportional multi-way valve |
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| US3265089A (en) * | 1963-12-11 | 1966-08-09 | Concordia Masch & Elekt | Three-way safety double valve |
| US4391296A (en) * | 1981-05-07 | 1983-07-05 | Abbott John D | By-pass pilot operated hydraulic check valve |
| CN2272083Y (en) * | 1996-05-20 | 1998-01-07 | 杭州精工液压机电有限公司 | Differential pressure feedback cone valve electrohydraulic proportional pressure reducing vavle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107289191A (en) * | 2017-07-18 | 2017-10-24 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of valve core structure of adjustable output gain |
| CN109707886A (en) * | 2019-01-11 | 2019-05-03 | 北京蓝箭空间科技有限公司 | Two-stage guide's pressure reducer |
| CN109798270A (en) * | 2019-02-25 | 2019-05-24 | 哈尔滨工业大学 | Multi-modal energy-saving servo actuator and the multi-modal energy-efficient method of realization |
| CN111853099A (en) * | 2020-07-13 | 2020-10-30 | 哈尔滨工业大学 | Moving-coil type two-position three-way high-speed switch valve for vehicle |
| CN112503042A (en) * | 2020-09-14 | 2021-03-16 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
| CN112503042B (en) * | 2020-09-14 | 2022-09-27 | 宁波华液机器制造有限公司 | Pilot valve structure and proportional pressure reducing valve |
| CN115750902A (en) * | 2022-11-29 | 2023-03-07 | 富阳通力机械制造有限公司 | Two-dimensional electro-hydraulic proportional valve manual unloading structure for quick self-locking jack |
| CN115750902B (en) * | 2022-11-29 | 2023-06-09 | 富阳通力机械制造有限公司 | Two-dimensional electro-hydraulic proportional valve manual unloading structure for quick self-locking jack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105909844B (en) | 2017-12-29 |
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