CN100572825C - Pressure regulator valve with intrinsic reponse system - Google Patents
Pressure regulator valve with intrinsic reponse system Download PDFInfo
- Publication number
- CN100572825C CN100572825C CNB2005800475885A CN200580047588A CN100572825C CN 100572825 C CN100572825 C CN 100572825C CN B2005800475885 A CNB2005800475885 A CN B2005800475885A CN 200580047588 A CN200580047588 A CN 200580047588A CN 100572825 C CN100572825 C CN 100572825C
- Authority
- CN
- China
- Prior art keywords
- pressure
- traveller
- backflow
- feedback
- pilot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention has described a kind of method and system that is used to be controlled at the motion of the actuatable load that acts in servo or the servo type system or move generally, wherein, unique being configured to that move through of described load provides the pressure regulator valve (10) of intrinsic pressure adjusting to be controlled.Because can being called as the pressure regulator valve (10) of dynamic pressure regulator, its performance use physically independent and free end bearing two travellers (40) and (50) valve body (12) in to regulate the control that acts in the whole system or the pressure between pilot pressure and load or the induced pressure.Although it is separate physically, two travellers (40) of described pressure regulator valve (10) and (50) cooperatively interact to keep the state of equilibrium of system, that is to say, keep acting on that actuator (220) is gone up or actuator pressure inside (induced pressure) or identical with the corresponding feedback pressure of induced pressure and control or pilot pressure.In addition, because two travellers (40) and (50) and the structure and the function that act on the reponse system on traveller (40) and (50), pressure adjusting and control are that pressure regulator valve (10) is intrinsic, have eliminated the demand to electronics or mechanical user's control system thus.
Description
Technical field
The present invention relates to be configured to control or regulate flowing and/or the servovalve or the servo type valve of pressure of servo-system or other control system inner fluid, relate in particular to pressure regulator valve with intrinsic reponse system, wherein, described pressure regulator valve is constructed with two independent sliding spool valves, the independent sliding spool valve operation of this pair with in open loop or closed-loop system, the especially pressure that flows of regulated fluid between control or pilot pressure source and source of load pressure especially.
Background technique
Control and servo-system for example hydraulic pressure or pneumatic system are well-known, and their running principle is simple, promptly by incompressible fluid pressure is delivered to outgoing position from application site.This transmission is finished by the cylinder that comprises piston usually, and this piston promotes incompressible fluid and passes another cylinder that fluid pipe-line enters the diverse location place, and this cylinder also has piston.A very big benefit by hydraulic system transfers power is that the incompressible flow fluid line that connects two cylinders can have any length and shape, and can reel or the crooked all types of positions of separating two pistons of passing.Fluid pipe-line can also be divided into a plurality of other fluid pipe-lines, thereby makes main piston can drive a plurality of relay pistons.Another advantage of hydraulic system is to be very easy to increase or reduce the active force of outgoing position.The increase of this hydraulic coupling is to realize with respect to the size of another piston by changing a piston.
In most of hydraulic systems, cylinder and piston are connected to the pump of supply as the high-pressure liquid of incompressible fluid by valve.Guiding valve is the valve of normal use in the hydraulic system, can apply forward and backward pressure to hydraulic actuator.Usually, in the piston type actuator, piston is withdrawn into needs very little power and very fast relatively in the cylinder.In order to finish this point, the fluid flow that has maximum possible during expectation low pressure, this can realize by guiding valve being moved to the position of opening reflux pipeline.But, when promoting piston,, then need big as far as possible pressure in order to produce maximum power at output terminal.Guiding valve is very suitable for hydraulic system, because they can obtain hydraulic coupling by pilot flow.
Yet although the advantage of guiding valve in hydraulic system, existing guiding valve has some design limit.Traditional slide-valve design becomes by electron servo or to be called the internal control of pilot pressure pressure actuated.Guiding valve is assemblied on the cylindrical sleeve with fluid flow port usually, and this fluid flow port extends through sleeve and can open or close, thereby, realize that by the correct position that shoulder and groove with traveller are placed in the sleeve fluid communicates with each other.Thereby more or less pressure fluid is flowed out to change working pressure from liquid-storage container by opening or closing this valve.Usually, by this valve of Current Control.Electric current is relevant with pressure, and the electric current that provides is big more, valve open big more, and the pressure fluid of outflow is many more.When the induced pressure on the actuator finally equals supply pressure, flow and stop.In other words, for given electric current, what can obtain to stipulate flows, and when the induced pressure that obtains equaled supply pressure, flowing to reduce also gradually finally stopped.When induced pressure during near reservoir pressure, valve loses linear response, and it is unstable that this slide valve gear system becomes.Therefore, slide valve gear usually pressure source (that is liquid-storage container) than induced pressure high a lot of and in Free Region the linear occasion of flow and input current move.This means described system particularly load be in pressured state always, can not under the effect of external force or himself weight, move freely.
Except the electric current flow field problem of conventional spool valves, classical hydraulic system other several aspect existing problems.At first, the cycle that needs complicated controller to come control valve and piston.Secondly, owing to need a large amount of fluids to move output piston, the cycle of mobile piston is very long usually.The 3rd, drive the stable supercharging that the required a large amount of fluids of output piston need big volumes of fluid hydraulic accumulator.Therefore, hydraulic machine needs a large amount of hydraulic fluids to move usually, and needs big exterior reservoir thus, thereby keeps the volume difference of the oil that the both sides of any cylinder discharge.
Because when controlled flow is when causing by valve, this controlled flow only is converted into controlled velocity usually, and classical slide valve gear is also restricted in application facet.Therefore, must use complicated system feedback device that energy is converted to position system from speed system.Introduce feedback means in the system and limited system, thereby the time lag between feedback means and the valve makes system's instability when applying resistance the bandwidth of feedback loop and the response of valve.
Also there is other problems in the classical servovalve of operating in classical servo-system.Because the problems referred to above, these valves and system can not operations stably on bigger bandwidth.In addition, the valve in many valve systems does not have all not in use, the energy that possible loss is very big.At last, these systems demonstrate relatively poor resistance.
Summary of the invention
Consider problems of the prior art and defective, the objective of the invention is to use the servo or servo type system of pressure regulator valve to overcome these problems with intrinsic reponse system by providing.
Although specifically stated some purposes of some different exemplary embodiments at this, they should be interpreted as limiting the scope of the invention in no instance.In fact, can think, each different exemplary embodiment all be included in this not concrete statement, those skilled in the art will be apparent and understandable other purposes implementing according to instruction and explanation when of the present invention.
According to embodying here and broadly described the present invention, feature of the present invention is generally and is used for pressure regulator valve servo or the servo type system, these servo or the execution of servo type system construction one-tenth one or more active and/or passive functions, for example drive or load of actuation, wherein, pressure regulator valve comprises two independent travellers and the intrinsic pressure reponse system that obtains thus.Pressure regulator valve is designed to be used in the servo type system---promptly (for example at control or pilot pressure and load or induced pressure, actuator in the load causes by being connected in, wherein actuator configurations one-tenth is converted to the power that drives load in response to the external force that acts in the load with the pressure that receives, and vice versa) between---the especially pressure that flows of regulated fluid.
The unique distinction of described pressure regulator valve is that it can move under high bandwidth, and the stability of sacrificial system not.The unique distinction of described pressure regulator valve also is, thereby by allow freely waving or dangling of load under the situation that does not need to import power the motion so that load movement or mobile realization are dangled, this pressure regulator valve can make the operation of servo type system high efficiency.In other words, determine and selected controlled conditions under, load can two-wayly freely be waved or dangle, and need not be connected in actuator in this load in the either direction active drive.Under this pattern, fluid can pass through the recovery mouth of pressure regulator valve directly in actuator, pressure regulator valve and shunting back and forth between the reflux accumulator alternatively.
Pressure regulator valve of the present invention uses the guiding or the pilot pressure that can be provided with as required and change, and does not need traditional feedback loop.Pilot pressure is used for the control chamber supply pressure that contacts to independent traveller fluid.Under the situation of induced pressure greater than pilot pressure, backflow traveller (returnspool) is opened, and allows fluid to flow through refluxing opening, thus the pressure in stable or the balance sysmte.Under the situation of pilot pressure greater than induced pressure, the pressure traveller is opened, and allows flow of pressurized fluid excess pressure mouth, thus the pressure in stable or the balance sysmte.Therefore, pressure regulator valve of the present invention can be a kind of valve with two independent travellers that float by describe, in general terms, described unsteady traveller is regulated corresponding pressure valve and reflux valve, wherein, described traveller works with cooperatively interacting, and is identical with control or pilot pressure in the pressure regulator valve with the pressure (induced pressure) that keeps acting on the actuator or in the actuator.In other words, thus when the pressure that changes in load actuator or the actuator was moved in load along either direction, the backflow traveller was regulated with the pressure traveller so that the interior pilot pressure of the pressure in the load actuator and pressure regulator valve is identical.When the pressure in the load actuator greater than guiding or during pilot pressure, open the valve release pressure, when the pressure in the load actuator during less than pilot pressure, valve suck pressure fluid and keep-up pressure constant, as regulator.Therefore, pressure regulator valve of the present invention can be counted as a dynamic pressure regulator.In fact, because when induced pressure or feedback pressure surpassed guiding or pilot pressure, control or pilot pressure can change and keep to stablize very fast, described pair of independent travellers work as dynamic predefined fixation pressure regulator.This makes system gain significantly to increase and can not influence the stability of system.
In addition, because described two independent traveller pressure regulator valves are a pressure source rather than speed source in essence, when being placed on when having in the servo of load of actuation or the servo type system, the pressure in the system is converted into the power that drives this load.Therefore, when the current pressure of system increased, consequent power also increased in the load.
Particularly, the invention is characterized in a kind of pressure regulator valve that is used to regulate the servo-system internal pressure, wherein this pressure regulator valve comprises: (a) valve body is formed with the reflux inlet and outlet, pressure entrance and outlet and first and second feedback port that are communicated with the cavity fluid of this valve body in this valve body; (b) the backflow traveller of free end bearing in described valve body, this backflow traveller are configured to flow by reflux inlet and outlet regulating fluid; (c) be independent of the backflow traveller and with the described backflow traveller pressure traveller of free end bearing in valve body relatively, wherein this pressure traveller is configured to flow by pressure entrance and outlet regulating fluid; (d) intrinsic pressure reponse system, it is configured in response to acting on pilot pressure on backflow traveller and the pressure traveller and the pressure reduction between the feedback pressure simultaneously and moves back to fluent post and pressure traveller, wherein, described intrinsic pressure reponse system is used to eliminate described pressure reduction so that form state of equilibrium between pilot pressure and the feedback pressure; And (e) being arranged on limit stoper in the valve body, this limit stoper is configured to determine backflow traveller and the limit position of pressure traveller in valve body in the running.
Feature of the present invention also is a kind of pressure regulator valve, and this pressure regulator valve comprises: (a) be configured to the unsteady backflow traveller that moves freely in valve body; (b) be configured to the floating pressure traveller that in described valve body, moves freely, described unsteady backflow traveller and floating pressure traveller are structurally separate and be independent of valve body, described unsteady backflow traveller and floating pressure traveller are regulated the interior pressure of servo-system by intrinsic reponse system, this intrinsic reponse system is configured to by in response to the pilot pressure on the opposite side that acts on backflow traveller and pressure traveller with the pressure reduction between the feedback pressure moves back to fluent post and the pressure traveller is eliminated pressure reduction, thereby systematically makes system pressure return to state of equilibrium.
Just now the intrinsic reponse system of Tao Luning comprised: first and second feedback cavity that are connected with the feedback pressure side liquid separately of unsteady backflow traveller and floating pressure traveller; Be formed in the valve body and first and second feedback port that are communicated with the described first and second feedback cavity fluids respectively; The main fluid pipeline that is communicated with the described first and second feedback port fluids; The load supply line that is communicated with main fluid pipeline and load energy converting system fluid, this load energy converting system is configured to load force is converted to induced pressure, the feedback pressure of this induced pressure decisive action on the feedback pressure side of described unsteady backflow traveller and floating pressure traveller; The directed cavity that is communicated with the pilot pressure side liquid separately of unsteady backflow traveller and floating pressure traveller; And being formed in the valve body and the targeting port that is communicated with the pilot valve fluid, this pilot valve is communicated with the pilot pressure source fluid that is configured to described pilot pressure chamber supply pilot pressure.This pilot valve is configured to control and changes pilot pressure.
Feature of the present invention also is a kind of method that is used to regulate and control servo type system internal pressure, wherein, this method comprises: the pressure regulator valve that has valve body and freely be arranged on independently reflux traveller and pressure traveller in this valve body (a) is provided, described backflow traveller and pressure traveller comprise pilot pressure side and feedback pressure side separately, and are configured to separately respectively to flow by being formed at reflux inlet in the valve body and outlet and pressure entrance and outlet regulating fluid; (b) supply pilot pressure to the side of pilot pressure separately of backflow traveller and pressure traveller; (c) supply feedback pressure to the side of feedback pressure separately of backflow traveller and pressure traveller; And (d) on the pilot pressure side of backflow traveller and pressure traveller and feedback pressure side, bring out pressure reduction, in backflow traveller and the pressure traveller at least one moved, to eliminate pressure reduction and to make pilot pressure and feedback pressure equates in response to pressure reduction.
Description of drawings
By description and claims below in conjunction with accompanying drawing, the present invention will become apparent.Should be appreciated that these accompanying drawings have only been described exemplary embodiment of the present invention, so they should not be construed as the restriction to invention scope.---as this paper general description with as shown in the accompanying drawing---can arrange and be designed to multiple different configuration to be understood that parts of the present invention easily.However, the present invention will be described its additional features and details and explained by using accompanying drawing.In the accompanying drawings:
Fig. 1 shown two independent traveller pressure regulator valves exemplary embodiment cut viewgraph of cross-section open, wherein pressure regulator valve is in state of equilibrium;
Fig. 2 has shown the viewgraph of cross-section of cutting open of exemplary two independent traveller pressure regulator valves shown in Figure 1, and wherein pressure regulator valve is in starting state, allows that pressure fluid enters the servo type system with convenient pilot pressure during greater than feedback pressure;
Fig. 3 has shown the viewgraph of cross-section of cutting open of exemplary two independent traveller pressure regulator valves shown in Figure 1, and wherein pressure regulator valve is in starting state, with convenient feedback pressure during greater than pilot pressure from the servo type system release pressure;
Fig. 4 has shown the viewgraph of cross-section of cutting open of exemplary two independent traveller pressure regulator valves shown in Figure 1, and wherein pressure regulator valve is in non-started state, and pilot pressure equaled or equaled substantially feedback pressure this moment;
Fig. 5 has shown the viewgraph of cross-section of cutting open of another exemplary two independent traveller pressure regulator valves, and wherein pressure feedback and return pressure feedback disconnects;
Fig. 6-A has shown a kind of sectional view of exemplary limit stoper, and the form of this limit stoper is for arranging at interval around the inner wall section hoop of valve body and from the outstanding a series of fritters of this inner wall section;
Fig. 6-B has shown the sectional view of another exemplary limit stoper, and the form of this limit stoper is from the outstanding single fritter of the inner wall section of valve body;
Fig. 6-C has shown the sectional view of another exemplary limit stoper, and the form of this limit stoper is from the outstanding annular ring of the inner wall section of valve body;
Fig. 7 has shown another exemplary embodiment of pressure regulator valve, and it has the mechanical pressure source that is configured to provide to backflow traveller and pressure traveller pilot pressure;
Fig. 8 has shown the viewgraph of cross-section of cutting open according to the pressure regulator valve of another exemplary embodiment of the present invention;
Fig. 9 has shown the profile perspective of pressure regulating system, and this pressure regulating system comprises four as described in Figure 8 and the pressure regulator valve that illustrates; And
Figure 10 has shown the exemplary application of using the pressure regulating system of Fig. 9, the just cutaway side sectional view of the part of the leg of power exoskeleton (exoskeleton).
Embodiment
Below to the specific descriptions of exemplary embodiment of the present invention with reference to accompanying drawing, described accompanying drawing forms the part of explanation, has wherein shown in illustrated mode and can implement several exemplary embodiment of the present invention.Be enough to make one of ordinary skill in the art to implement the present invention although these exemplary embodiments extremely describe in detail, should be appreciated that, can realize other embodiments and can carry out various modifications and not break away from the spirit and scope of the present invention the present invention.Therefore; below---as Fig. 1 to shown in Figure 9---is not to be used for restriction as claims scope of invention required for protection to the more detailed description of embodiments of the invention, but only be used for illustration and unrestricted feature of the present invention and characteristics are described, propose preferred forms of the present invention and enough make one of ordinary skill in the art implement the present invention.Therefore, scope of the present invention is limited separately by claims.
Can understand followingly to specific descriptions of the present invention and exemplary embodiment better by the reference accompanying drawing, wherein, element of the present invention and feature are indicated with reference character in the text.
The present invention has described a kind of method and system of motion of the actuatable load that is used for being controlled at servo or effect of servo type system or operation generally, wherein, moving through of load is configured to provide the pressure regulator valve (calling " PCV " in the following text) of the uniqueness that intrinsic pressure regulates to control.Therefore different with traditional flow control valve, PCV of the present invention provides better power performance, and it can provide sufficiently high gain, and realizes soft or more performance, and can not become unstable.In fact, PCV of the present invention provides power control, rather than the speed controlling in the conventional flow adjustable valve.
Because the unique distinction that its performance can be known as the described PCV of dynamic pressure regulator is, its use the physically independent and two travellers of free end bearing in valve body come regulating action in whole system control or the pressure between pilot pressure and load or the induced pressure.Although two travellers of PCV are separate physically, cooperatively interact on the function to keep the state of equilibrium of system, promptly the pressure (induced pressure) that maintenance acts on the actuator or actuator is interior is identical with control or pilot pressure.In addition, because the structure and the function of two travellers and intrinsic reponse system, pressure is regulated and control is that PCV is intrinsic, has eliminated the demand of electronics or mechanical user being regulated reponse system thus.
Described PCV activates and regulates thus pressure by intrinsic reponse system, this intrinsic reponse system is moved in response to the pressure reduction between induced pressure (or feedback pressure) and the pilot pressure, wherein, described pressure reduction can be by the variation of any or both in induced pressure or the pilot pressure and is produced.Two independently traveller be that pressure traveller and backflow traveller are freely located or be arranged in the PCV, also regulate pressure thus by separately pressure port and flowing of refluxing opening regulated fluid, thereby systematically control enters the pressure fluid of system and the fluid that is back to fluid reservoirs from system.In fact the actuating of PCV means at least one or the two the intrinsic actuating in response to pressure reduction in the traveller, with eliminate pressure reduction and recover pilot pressure and feedback or induced pressure between balance.Because the configuration of PCV, thereby flow, regulate pressure more specifically by moving to either direction by pressure port or refluxing opening or the two regulated fluid, two independent travellers respond the pressure reduction between inner orientation pressure and/or the induced pressure inherently and systematically.Particularly, when induced pressure during greater than pilot pressure, the backflow traveller moves opens refluxing opening, thereby the pressure in the delivery system is to keep intrasystem pressure balance.Otherwise when pilot pressure during greater than induced pressure, the pressure traveller moves opens pressure port, thereby increases intrasystem pressure to keep intrasystem pressure balance.On the other hand, refluxing opening and pressure port can partially open and/or close simultaneously, with pressure in the regulating system and the predetermined system pressure state of realization.
Open pressure port when pilot pressure forces the pressure traveller, when making pressure fluid enter in the system thus, PCV gives actuator with the propagation of pressure that produces, and described actuator is converted to pressure the power that drives load.Thereby when in load, applying external force and increase intrasystem induced pressure, actuator is converted to pressure with this power, wherein, the pressure of increase moves the backflow traveller of PCV and opens refluxing opening with the pressure in the delivery system, thereby keeps the state of equilibrium between pilot pressure and the induced pressure.In addition, PCV be configured to offer load on himself weight effect down or in response to the ability of external force unrestricted motion or swing (be called and dangle) herein.This is to be lower than feedback pressure by optionally reducing and keeping pilot pressure, thereby moving, the backflow traveller opens refluxing opening, the pressure loss in the reduction system thus, and allow fluid at actuator and pressure regulator valve and/or swing to and fro between the reflux fluid liquid-storage container alternatively or shunt and realize.In the above-mentioned aspect each all will go through below.
In certain embodiments and under some systematic parameter, PCV do not have a large amount of use or the situation of the original fluid deposit that dilution is pressurized under move.This be by provide separately and independently pressure traveller and the backflow traveller fluid controlling pressure fluid respectively and return liquid-storage container realize.Separately, independently traveller also makes the area can be on the valve but not take place on actuator than hydraulic pressure increase, only need a spot of pressure fluid to increase thus or reduce the power output of hydraulic system.This has just generated main concern and has saved fluid consuming and preserve the principal pressure source, rather than needs the servo or servo type system of a large amount of fluids as existing related system.If area changes than on valve, the sensitivity action that is caused by actuator will can not be used whole fluid supplies so, and be to use the part of used fluid in traditional servo-system.In other words, under some systematic parameter, two independent sliding spool valves can allow fluid being independent of the principal pressure source and/or flowing through refluxing opening and one or more pressure regulator valve of one or more actuators under the situation in not obvious interference principal pressure source.
Definition
Here used phrase " pressure reduction " and similarly wording should be understood to expression or refer to the nonequilibrium state that exists between the pilot pressure and induced pressure in the system.In certain embodiments, " pressure reduction " can represent the simple difference of pressure size between induced pressure and the pilot pressure.In other embodiments, be that those utilize area to reduce among the embodiment of realization load/power conversion or increase, consider that the different area of valve body, actuator and any hydraulic pressure increase, " pressure reduction " can represent out-of-proportion pressure difference of existing between induced pressure and the pilot pressure.
Here used phrase " induced pressure " should be understood to the interior pressure that exists of load actuator that expression is connected in load.Induced pressure directly influences and determines feedback pressure.
Here used phrase " feedback pressure " should be understood to be illustrated in all area minimizing/increases and hydrodynamic pressure increase/distribution (if any) taken place the back received or by the pressure on the feedback pressure side that acts on backflow traveller and pressure traveller of induced pressure decision.In some cases, feedback pressure can equal induced pressure.
Here used phrase " load actuator " should be understood to expression can convert fluid energy to the available energy for example any system or the device of mechanical energy.The typical case of load actuator is the hydraulic actuator that is connected in load, and wherein, hydraulic actuator receives the pressurized working fluid of hydraulic fluid source, and is converted into mechanical work or the power that is enough to drive load.
Terminology used here " dangles " and should be understood to the effect of expression load response external force and freely wave along either direction, wherein, do not providing initiatively input with moving (this situation can be called passive obedience) along realization load under the situation of either direction moving load.The pressure regulator valve of the present invention that moves down " rocking pattern " makes the ability that dangles or freely wave become possibility.
Terminology used here " rocks " or phrase " rocks pattern " and should be understood to the state of expression pressure regulator valve, and wherein, pilot pressure reduces also and maintains under load or the feedback pressure, and the traveller that causes thus refluxing moves to open position.Pilot pressure can fluctuate, so that keep load or the feedback pressure (for example, relative position owing to the piston actuator that be connected in load in cause) of pilot pressure less than any fluctuation.Because pilot pressure is opened less than load or feedback pressure and backflow traveller, fluid can directly be shunted back and forth or rock between load actuator and reflux fluid liquid-storage container by the refluxing opening of opening of pressure regulator valve, thereby realize the Passively activated of load, described Passively activated can be external force (for example, gravity, the outside that acts on load applies result of power etc.) or the load movement that causes of the internal force (for example, momentum result etc.) that brings out.The shunting of fluid does not almost have resistance, has increased the impedance of system thus.
Under the pattern of rocking, need not as existing relevant servo-system, on either direction, initiatively to import (for example, power) to change the motion of load.Like this, the passive startup of load.In fact, existing related system only is lip-deep passive, that is still needs to a certain degree power with along unidirectional or two-way moving load.This prior art state can be called " initiatively obey ", although because system looks like passively, it is actually initiatively.
On the other hand, pressure regulator valve of the present invention can passive obedience." passive obedience " can refer to be included in the servo or intrasystem pressure regulator valve of the present invention of servo type makes load response start passively in bringing out external force or internal force under without any input initiatively or the situation from the effect (power) of system or the ability of motion.
Intrinsic adjusting pressure regulator valve
With reference to Fig. 1, demonstration be the sectional view of cross section longitudinally of an exemplary embodiment of two independent traveller pressure regulator valves.Particularly, Fig. 1 has shown the two independent traveller pressure regulator valve (PCV) 10 that is configured to for example regulate in the hydraulic system in closed-loop system pressure.Shown in exemplary embodiment in, PCV 10 comprises valve body 12, this valve body 12 comprises the built-in linear structure, and being formed with reflux inlet 14, bypass outlet 16, pressure entrance 18, pressure export 20, form in this structure is first and second feedback port and the pilot pressure port 26 of backflow traveller feedback port 22 and pressure traveller feedback port 24.PCV 10 also comprises the two independent traveller of the longitudinal axis setting that centers on valve body 12 usually, and traveller 40 and pressure traveller 50 promptly reflux.Backflow traveller 40 and pressure traveller 50 freely are provided with and are bearing in the valve body 12, and it moves the restriction that is subjected to one or more limit stoper such as traveller chock 34,44 and 54.
As shown in the figure, the specific embodiment of this valve body 12 comprises columniform tubular structure, and this tubular structure has the inner chamber 60 that the wall section by valve body 12 limits there.Inner chamber 60 is configured to comprise or holds each backflow traveller 40 and pressure traveller 50, and holds their displacement.In fact, the diameter of inner chamber 60 or cross-section area are slightly larger than the diameter or the cross-section area of backflow traveller 40 and pressure traveller 50, make thus that backflow traveller 40 and pressure traveller 50 are can be in inside two-way to be moved, and the internal surface of the wall section of sealed valve body 12 fully when needed.Inner chamber 60 makes backflow traveller 40 and pressure traveller 50 can keep its orientation when moving around in inner chamber 60 with respect to the size of backflow traveller 40 and pressure traveller 50.
The size of inner chamber 60 and backflow traveller 40 and pressure traveller 50 also is designed to realize sealing relationship.Substantially, valve body 12, especially inner chamber 60 limit various chambers therein.As shown in Figure 1, valve body 12 comprises by the pilot pressure chamber 28 of distance between backflow traveller 40 and the pressure traveller 50 or area limiting, by the backflow traveller feedback cavity 62 of the area limiting between the end of backflow traveller 40 and valve body 12 and by the pressure traveller feedback cavity 68 of the area limiting between the other end of pressure traveller 50 and valve body 12.The size of each all can change according to one or two the actual displacement distance in backflow traveller 40 in the PCV actuation process and the pressure traveller 50 in these chambers.By the interaction of backflow traveller 40 and pressure traveller 50 with the internal surface of the wall of valve body 12, each chamber 62,68 all separates hermetically with pilot pressure chamber 28.Sealing relationship between backflow traveller 40 and pressure traveller 50 and the valve body 12 has been eliminated harmful fluid and has been disturbed and pressure leakage, has kept the integrity of system.The means of any known in the prior art of can using backflow traveller 40 and pressure traveller 50 realize the sealing relationship with valve body 12.But no matter use which kind of sealing to be provided with, backflow traveller 40 and pressure traveller 50 should be configured to the pressure reduction of effect in the responding system and move, with stable steering pressure and load or feedback pressure.
PCV 10, and particularly valve body 12, also comprise several mouths that are used to make things convenient for fluid to flow through PCV 10 and be communicated with inner chamber 60.In the embodiment shown, be formed with several entrance and exits on the valve body 12, they are regulated by the location of backflow traveller 40 and pressure traveller 50.Particularly, valve body 12 comprises reflux inlet 14 and bypass outlet 16, wherein, and under induced pressure those situations greater than pilot pressure, backflow traveller 40 is moved to open these mouthfuls, allow fluid pass therethrough and pressure is discharged from the system that PCV 10 and PCV 10 move therein.Valve body 12 also comprises pressure entrance 18 and pressure export 20, wherein, under pilot pressure those situations greater than induced pressure, pressure traveller 50 is moved to open these mouthfuls, allow fluid pass therethrough and pressure is input in the system that PCV 10 and PCV 10 move therein.
In the embodiment shown in fig. 1, reflux inlet 14 and bypass outlet 16 are illustrated backflow traveller 40 closures of arranging by in the valve body 12, and pressure entrance 18 and pressure export 20 also are illustrated pressure traveller 50 closures of arranging by in the valve body 12.This situation or operation configuration represent that output or induced pressure (and feedback pressure) equate that with pilot pressure described system stability also is in state of equilibrium.In other words, do not have the pressure reduction that backflow traveller 40 or pressure traveller 50 are moved in the system, PCV 10 is static.In fact, because it is stable that system keeps between guiding that equates and induced pressure, both do not had pressure to enter this system, and do not had pressure to pass through reflux inlet 14 and bypass outlet 16 or pressure entrance 18 and pressure export 20 yet and from system, discharge by reflux inlet 14 and bypass outlet 16 or pressure entrance 18 and pressure export 20.
One of them unique aspect of the present invention is, control in the system or pilot pressure can reduce and remain on the degree that is enough to open backflow traveller 40 and reflux inlet 14 and bypass outlet 16.Under this pattern, PCV 10 is used to make fluid to swing to and fro between load actuator (hydraulic actuator) and reflux fluid liquid-storage container or shunt according to move through reflux inlet 14 and the bypass outlet 16 of load.This makes load freely wave under importing with the situation that drives this load along either direction without any need for active or to dangle effectively.The notion that dangles that PCV 10 is in when rocking pattern will discuss in more detail below.
Also be formed with on the valve body 12 and be used to make things convenient for pressure fluid to flow into the pilot pressure port 26 in pilot pressure chamber 28.Pilot pressure port 26 is communicated with a pilot valve (not shown) fluid, this pilot valve be configured to from a fluid source for example pump to guiding pressure chamber 28 supplied with pressurised fluid.Pass the pressure fluid that pilot pressure port 26 enters pilot pressure chamber 28 (thereby, guiding or pilot pressure) be used for effect on the pilot pressure side 52 of the pilot pressure side 42 of backflow traveller 40 and pressure traveller 50, thus backflow traveller 40 and pressure traveller 50 are removed mutually.In addition, being input to pilot pressures in the pilot pressure chamber 28 is used to resist or offset and also acts on load or feedback pressure on backflow traveller 40 and the pressure traveller 50 by feedback system fluid.Equally, pilot pressure is as the pilot pressure of PCV 10 and system.In fact, pilot pressure can be optionally increases or reduces or remain unchanged with respect to induced pressure, with moving of control backflow traveller 40 and pressure traveller 50, and the pressure in the control system thus.The change of pilot pressure or conversion can very rapidly be carried out, and this makes that PCV can be as dynamically predetermined fixation pressure regulator effect.
Should understand, the size in pilot pressure chamber 28 can change along with the size of pilot pressure and induced pressure are used for resisting backflow traveller 40 and the final mobile position of pressure traveller 50 in valve body that this pilot pressure obtains by reponse system.Therefore, pilot pressure chamber 28 changes with the relation between pilot pressure and load or the feedback pressure.Will also be appreciated that regardless of the induced pressure size,, therefore in PCV 10, will always have pilot pressure chamber 28 because backflow traveller 40 and pressure traveller 50 can not be in contact with one another.In fact, because the various limit stoper in the end of valve body 12 and the various inner chamber 60 that is arranged on valve body meticulously, backflow traveller 40 and pressure traveller 50 transportable distances are restricted.
Limit stoper is used to control the displacement distance that each backflow traveller 40 and pressure traveller 50 can be advanced in valve body 12.More specifically, limit stoper is used for setting up predetermined running position in various running statees or the pattern of PCV 10 for each traveller.An exemplary forms of limit stoper is the traveller chock in a plurality of inner chambers that are arranged on valve body 12 meticulously 60, is used to prevent the unnecessary movement of traveller in valve body 12.These of Fig. 1 demonstration are traveller chocks 34,44 and 54.Because traveller chock 34 and 54, backflow traveller 40 can not contact each other with pressure traveller 50, wherein, moving of traveller chock 34 limit return flow travellers 40, thereby backflow traveller 40 can not close targeting port 26, similarly, and the moving of traveller chock 54 restriction pressure travellers 50.Therefore, pilot pressure chamber 28 exists always and can be by the fluid of pilot pressure port 26 receptions from the pilot pressure source.
The backflow traveller feedback port 22 that is formed at first end of valve body 12 is convenient to load actuator (not shown) and backflow traveller feedback cavity 62 and is communicated with as feedback pressure side 46 fluids of the backflow traveller 40 on a border of backflow traveller feedback cavity 62, and described load actuator can comprise for example hydraulic actuator of a load actuator.Therefore, can flow through backflow traveller feedback port 22 and enter backflow traveller feedback cavity 62, transmit a feedback pressure to the feedback pressure side 46 of backflow traveller 40 thus from the fluid of load actuator.Backflow traveller feedback cavity 62 has predetermined diameter or cross-section area, induced pressure is converted to the feedback pressure that acts on the backflow traveller 40.
Should understand, when the feedback pressure in the backflow traveller feedback cavity 62 during greater than the pilot pressure in the pilot pressure chamber 28, backflow traveller 40 will move towards the center in pilot pressure chamber 28, up to contacting with traveller chock 34, open reflux inlet 14 and bypass outlet 16 thus with release pressure.Backflow traveller 40 rests on this position and equates up to induced pressure and pilot pressure.Otherwise when the feedback pressure in the backflow traveller feedback cavity 62 during less than the pilot pressure in the pilot pressure chamber 28, backflow traveller 40 will move towards the end of valve body 12 away from pilot pressure chamber 28, up to contacting with traveller chock 44.In this position, reflux inlet 14 and bypass outlet 14 are closed, thereby system pressure is increased.Backflow traveller 40 is kept the pressure of this position in backflow traveller feedback cavity 62 once more above the pilot pressure in the pilot pressure chamber 28.
Similarly, the pressure traveller feedback port 24 that is formed at second end of valve body 12 is convenient to load actuator (not shown) and pressure traveller feedback cavity 68 and is communicated with as feedback pressure side 56 fluids of the pressure traveller 50 on a border of pressure traveller feedback cavity 68.Therefore, can flow through pressure traveller feedback port 24 and enter pressure traveller feedback cavity 68, transmit a feedback pressure to the feedback pressure side 56 of pressure traveller 50 thus from the fluid of load actuator.Pressure traveller feedback cavity 68 has predetermined diameter or cross-section area, induced pressure is converted to the feedback pressure that acts on the pressure traveller 50.
Should understand, when the feedback pressure in the pressure traveller feedback cavity 68 during greater than the pilot pressure in the pilot pressure chamber 28, pressure traveller 50 will move towards the center in pilot pressure chamber 28, up to contacting with traveller chock 54, and closing pressure inlet 18 and pressure export 20 thus.Pressure traveller 50 is kept this position and is equated up to induced pressure and pilot pressure.Otherwise, when the feedback pressure in the pressure traveller feedback cavity 68 during less than the pilot pressure in the pilot pressure chamber 28, pressure traveller 50 will move towards the end of valve body 12 away from pilot pressure chamber 28, thereby open pressure entrance 18 and pressure export 20 to increase system pressure.Pressure traveller 50 is kept the pressure of this position in pressure traveller feedback cavity 68 once more above the pilot pressure in the pilot pressure chamber 28, and at this moment pressure entrance 18 and pressure export 20 are closed.
Limit stoper---to be traveller chock 34,44 and 54---be configured to respectively limit return flow traveller 40 and pressure traveller 50 moving in the inner chamber 60 of valve body 12.More specifically, described limit stoper traveller 40 and pressure traveller 50 correct the moving and aiming at that be configured to guarantee to reflux with respect to reflux inlet 14 and bypass outlet 16, pressure entrance 18 and pressure export 20 and pilot pressure port 26.As mentioned above, the move toward one another of traveller chock 34 limit return flow travellers 40 and pressure traveller 50.Particularly, traveller chock 34 is arranged such that backflow traveller 40 can not close pilot pressure port 26.Traveller chock 34 prevents that also reflux inlet 14 and bypass outlet 16 are communicated with fluid between the backflow traveller feedback port 22.
As shown in the figure, traveller chock 44 limit return flow travellers 40 moving towards the end of valve body 12.Particularly, traveller chock 44 is located such that reflux inlet 14 and bypass outlet 16 are closed when backflow traveller 40 contacts with traveller chock 44.This location that will also be appreciated that traveller chock 44 prevents that also reflux inlet 14 and bypass outlet 16 are communicated with fluid between the pilot pressure chamber 28.
As mentioned above, PCV 10 also comprises two independent travellers, promptly reflux traveller 40 and pressure traveller 50, and they preferably freely are provided with or are bearing in the inner chamber 60 of valve body 12.Supporting freely means that traveller does not interconnect or be connected in any other structure or for example mechanically actuated or bearing device of device.In other words, traveller floats in the inside of valve body, their motion or mobile pressure and the valve body 12 interior any limit stoper restrictions that are provided with that only are subjected to by them.In one aspect, backflow traveller 40 and pressure traveller 50 are lightweight travellers.But the quality of traveller can change according to application.
Backflow traveller 40 and pressure traveller 50 are used for operation independently of each other in valve body 12.Terminology used here " independence " or phrase " control independently and operate " or arbitrarily other similar term or wording be used for representing that described two travellers are handled separately or separately or control, and they do not interconnect each other or interdepend.This also represent to reflux traveller 40 and pressure traveller 50 act on the intrinsic pressure parameter in the system and move or be forced to move in response preset time arbitrarily, rather than by any machinery or electronically controlled actuator or system activation.More specifically, PCV is used for regulating the intrasystem pressure that comprises this PCV according to the intrinsic pressure feedback system of PCV, wherein, described backflow traveller and pressure traveller according to Installed System Memory or the pressure reduction of effect be forced to move to eliminate pressure reduction and to make pilot pressure and load or feedback pressure equate.When there are not pressure reduction simultaneously in the load or the feedback pressure of a side that acts on backflow traveller and pressure traveller and the pilot pressure that acts on the opposite side of described backflow traveller and pressure traveller simultaneously.Owing to these two pressure on the opposite side that acts on backflow traveller and pressure traveller simultaneously are different, according to leading pressure, described backflow traveller and pressure traveller will move to open and close suitable mouth, this required fluid of pressure that will promote or cut off the balance whole system flows, or is used for induced pressure and pilot pressure on the balanced load actuator.
In PCV10, when the feedback pressure on the feedback pressure side that acts on backflow traveller 40 and pressure traveller 50 produces pressure reduction with acting on when pressure on the pilot pressure side of backflow traveller 40 and pressure traveller 50 varies in size.This pressure reduction has the induced pressure of being beneficial to or pilot pressure.In any case backflow traveller 40 and pressure traveller 50 are designed to respond this pressure reduction and move so that pilot pressure and load or feedback pressure return to state of equilibrium.But because pilot pressure specifically and is optionally controlled, this pilot pressure can produce predetermined pressure difference at predetermined lasting time.Therefore, increase system pressure if desired, then optionally handle pilot pressure and make it, pressure traveller 50 is moved opening pressure entrance 18 and pressure export 20, and make the pressure fluid of pressure source enter system greater than load or feedback pressure.Similarly, reduce system pressure if desired, then optionally handle pilot pressure and make it to be lower than load or feedback pressure, backflow traveller 40 is moved opening reflux inlet 14 and bypass outlet 16, and from system's release pressure.Should be noted that, can in system, produce pressure reduction by handling pilot pressure or load.In any case final the moving of traveller is used to open and close suitable entrance and exit with the pressure in the regulating system.
As mentioned above, the feedback side 46 of backflow traveller 40 is communicated with backflow traveller feedback cavity 62 fluids, and pilot pressure side 42 is communicated with pilot pressure chamber 28 fluids.Shoulder 72 and 74 has suitable diameter or cross-section area, thereby can seal with the inner wall surface of valve body 12.Because sealing, in the moving process of backflow traveller 40, fluid is communicated with or the fluid interference between shoulder 72 and 74 anti-backflow traveller feedback cavity 62, groove 82 and the pilot pressure chamber 28.In addition because the diameter of groove 82 is less than shoulder 72 and 74, shoulder 72 and 74 and groove 82 be used to promote fluid to pass reflux inlet 14 correctly to flow to bypass outlet 16.In fact, in case these mouthfuls are opened, then fluid passes reflux inlet 14 and enters PCV 10, passes the groove 82 of backflow traveller 40, and flows out from bypass outlet 16.
Similarly, as described above, the feedback side 56 of pressure traveller 50 is communicated with pressure traveller feedback cavity 68 fluids, and the pilot pressure side 52 of pressure traveller 50 is communicated with pilot pressure chamber 28 fluids.Shoulder 76 and 78 also has suitable diameter or cross-section area, thereby can seal with the inner wall surface of valve body 12.Because sealing, in the moving process of pressure traveller 50, shoulder 76 and 78 prevents that fluid is communicated with or the fluid interference between pressure traveller feedback cavity 68, groove 84 and the pilot pressure chamber 28.In addition because the diameter of groove 84 is less than shoulder 76 and 78, shoulder 76 and 78 and groove 84 be used to promote fluid to pass pressure entrance 18 correctly to flow to pressure export 20.In fact, in case these mouthfuls are opened, then fluid passes pressure entrance 18 and enters PCV 10, passes the groove 84 of pressure traveller 50, and flows out from pressure export 20.
According to following back to back description, one of them characteristic of PCV of the present invention are its intrinsic reponse system.With emphasize and be used to control that the existing related system that fluid flows is different, this intrinsic reponse system is used to make PCV response to bring out conditioned disjunction automatically to regulate with maneuverability pattern and control servo or the intrasystem pressure of servo type, and all these does not need the external control device.This intrinsic reponse system is the function that fluid is communicated with between different parts and guiding and the induced pressure of PCV.More specifically, this intrinsic reponse system is to act on the pilot pressure on the opposite side of independently reflux traveller and pressure traveller and the function of the connection between the induced pressure, and wherein, described induced pressure and pilot pressure are confronted with each other.Independently reflux traveller and the pressure traveller that can be counted as the unsteady traveller in the valve body are configured to according to the pressure reduction that produces action mutually with echoing, so that move methodically to open suitable mouthful of pressure that increases or reduce whole system.Because the various limit stoper of in system, arranging meticulously, and the relative positioning of reflux inlet and outlet and pressure entrance and outlet, reflux independently that traveller and pressure traveller are configured to correspondingly to move so that this servo-system returns to as much as possible near state of equilibrium, described traveller only moves by system restriction and/or optionally and the restriction of controlled operating conditions.The different examples of the intrinsic reponse system of PCV of the present invention show in the accompanying drawings, and are described below with reference to the various running statees of PCV.
At last, first feedback port 22 and second feedback port 24 are communicated with first feedback line 192 and second feedback line, 196 fluids respectively, wherein, first feedback line 192 and second feedback line 196 are configured to receive from the fluid of main line 200 or to main line 200 transmitting fluids.Main fluid pipeline 200 is connected with load actuator (not shown) fluid by load supply pipeline 210.Load supply pipeline 210 is configured to and is used as delivery outlet or induced pressure mouth.
Although Fig. 1 has shown the exemplary embodiment of PCV, should understand, imagined other embodiments here.In fact, PCV shown in Figure 1 can be modified as backflow traveller 40 and the pressure traveller 50 that comprises isomorphism type not or size.But obviously, valve body 12 must have corresponding diameter difference to hold the traveller of different size.Therefore, in other embodiments, it is contemplated that the independent traveller that is provided with in valve body 12 and the valve body can have identical or different diameters and the different geometric cross-sectional shape except that circular.In addition, the size of the mouth 14,16,18,20,22,24 and 26 in the valve body 12 can change, and in order to obtain the required specified pressure-Li-area relationship of concrete or given application, can expect the combination of various sizes and shape.
With reference to Fig. 2, the sectional view of the cross section longitudinally of exemplary two independent traveller pressure regulator valves (PCV) of describing above showing and in Fig. 1, showing, wherein, PCV 10 operationally is included in servo or servo type system particularly in the hydraulic actuator system 100.Particularly, Fig. 2 has shown the PCV 10 that is in starting state, and wherein pressure entrance 18 and pressure export 20 are opened.In this case, servo-system has a pilot pressure, and this pilot pressure is greater than load or feedback pressure on the feedback pressure side that is applied and acted on backflow traveller 40 and pressure traveller 50 by the actuator piston 240 that comprises in the actuator 220.In order to obtain this state, the pilot pressures act of the rising that exists in the pilot pressure chamber 28 is on the pilot pressure side 42 and 52 of backflow traveller 40 and pressure traveller 50.Because the existence of traveller chock 44, backflow traveller 40 can not move, thereby reflux inlet 14 and bypass outlet 16 are kept and closed.On the contrary, when the pilot pressure on the pilot pressure side 52 that acts on pressure traveller 50 surpassed feedback pressure on the feedback pressure side 56 act on pressure traveller 50, described pilot pressure moved pressure traveller 50.Owing to overcome feedback and/or induced pressure, pressure traveller 50 moves away from traveller chock 54, is oriented to open pressure entrance 18 and pressure export 20 thus.This make from flow of pressurized fluid excess pressure inlet 18 of pressure source (not shown), pass pressure traveller 50 groove 84, flow out and enter hydraulic actuator 220 from pressure export 20 via main fluid pipeline 200.In essence, system pressure increases by additional pressure fluid, proves that thus PCV returns to system 100 ability of the state of equilibrium that pilot pressure equates with feedback pressure.Pressure source can be configured to supply fluid under any pressure according to the operation conditions of expectation, but should be enough to drive actuator piston 240 and load subsequently 250 usually.
As mentioned above, pilot pressure acts on the backflow traveller 40 simultaneously, and the traveller 40 that causes refluxing continues to contact with traveller chock 44, and wherein, backflow traveller 40 is positioned to closing volume inlet 20 and bypass outlet 18, prevents fluid outflow system 100 thus.Should be appreciated that because pilot pressure greater than feedback pressure, therefore forms pressure reduction, thereby pressure traveller 50 is moved in system 100.It is also understood that pressure traveller 50 can respond pressure reduction under the situation that does not have the external control device, illustrate the intrinsic feedback performance of PCV of the present invention thus.
In addition, Fig. 2 has shown first and second feedback port 22 and 24 that are communicated with main fluid pipeline 200 fluids.Reflux inlet 14 and bypass outlet 16 and pressure entrance 18 and pressure export 20 also are communicated with the main fluid line fluid.Load actuator 220 also is communicated with main fluid pipeline 200 fluids by load supply line 210 (or output/induced pressure mouth), this makes fluid can flow into and flow out actuator 220 (for example, allowing pressure fluid to flow into actuator 220 with mobile piston 240 and driving load 250).Thereby described main fluid pipeline 200 and load supply line 210 are as PCV 10 fluids are connected to the device that actuator 220 can be worked PCV 10 as desired.
As mentioned above, pressure regulator valve comprises output/induced pressure mouth.In the embodiment shown, main fluid pipeline 200 also is communicated with output/induced pressure mouth or load supply line 210 fluids, and this load supply line 210 can flow fluid between main fluid pipeline 200 and load actuator 220.In Fig. 2, load actuator 220 is the hydraulic actuators with bottom-loaded piston, means that described load supply line 210 is connected to the bucket cylinder 230 of piston 240 belows.Increase the pressure in the hydraulic system, increase the pressure in the part below piston 240 of bucket cylinder 230 thus, cause piston 240 to move away from load supply line 210, thereby apply power in load 250, load 250 shown in Figure 2 is axial blocker.
Therefore, load actuator 220 can on the pressure side apply variable load or feedback pressure on 46 and 56 in the load feedback of backflow traveller 40 and pressure traveller 50 by main supply line 200.That is to say, when the load of hydraulic actuator 220 is converted into feedback pressure less than pilot pressure, can produce pressure reduction.This pressure reduction causes pressure traveller 50 correspondingly to move to open pressure entrance 18 and pressure export 20, so that eliminate pressure reduction and make system's balance once more.Open these and mouthful cause pressure fluid to enter system, cause thus piston 240 with load 250 that this piston 240 connects on apply a related power.Perhaps, when being converted into feedback pressure greater than pilot pressure, the load of load actuator 220 can produce another dissimilar pressure reduction.This pressure reduction traveller 40 that causes refluxing correspondingly moves to open reflux inlet 14 and bypass outlet 16, so that eliminate pressure reduction and make system balancing.Open these mouthfuls,, reduce the pressure of whole system thus and make the load withdrawal from system's releasing pressurized fluid.As can be seen, intrinsic reponse system makes PCV 10 of the present invention compare existing related system to have tangible advantage.
With reference to Fig. 3, show the sectional view of the cross section longitudinally of top exemplary two independent traveller pressure regulator valves (PCV) of describing and in Fig. 1, showing equally, wherein, PCV 10 operationally is included in the hydraulic actuator system 100.Particularly, Fig. 3 has shown the PCV 10 that is in the pressure releasing state, and wherein load or feedback pressure are greater than the pilot pressure in the pilot pressure chamber 28.In this case, the load feedback of backflow traveller 40 on the pressure side 46 is subjected to the feedback pressure effect and moves away from traveller chock 44, is oriented to open reflux inlet 14 and bypass outlet 16 thus.This make reflux fluid flow through reflux inlet 14, pass backflow traveller 40 groove 82, flow out and return reflux fluid liquid-storage container (not shown) from bypass outlet 16.Simultaneously, the load feedback that feedback pressure also acts on pressure traveller 50 on the pressure side on 56, promotes pressure traveller 50 and lean against on the traveller chock 54, thereby closing pressure inlet 18 and pressure export 20 prevents that thus pressure fluid from flowing through hydraulic system 100.
Should understand, owing to have pressure reduction between pilot pressure and load or the feedback pressure, backflow traveller 40 moves under the effect of feedback pressure.In fact, on the pressure side there are pressure reduction in the pilot pressure side 42 and the load feedback of backflow traveller 40 between 46 because feedback pressure greater than pilot pressure, floats.Also act on the floating pressure traveller 50 similar pressure reduction is arranged.Therefore, when load or feedback pressure greater than pilot pressure, and backflow traveller 40 is moved when opening reflux inlet 14 and bypass outlet 16, pressure traveller 50 also is compressed against on the traveller chock 54, thereby closing pressure inlet 14 and pressure export 16.Open reflux inlet 14 and bypass outlet 16, make fluid flow out actuator 220 and PCV, thus the pressure in the delivery system 100.
By pilot pressure is reduced under induced pressure or the feedback pressure, thereby reflux inlet 14 and bypass outlet 16 are opened, realized another unique aspect of PCV 10.Under this state that is called the pattern of rocking, the refluxing opening that load 250 that causes in response to external force is applied to it and the motion of actuator piston 240 subsequently, reflux fluid can be passed PCV 10 is at PCV 10 and actuator 220 and shunt back and forth between the fluid reservoirs alternatively or rock.Under the pattern of rocking, load can be moved under the situation of system without any the active drive input.In other words, when PCV 10 is in when rocking pattern, load can not need initiatively input freely waving under the situation of either direction moving load or to dangle, and in the existing related system initiatively input be essential.For example, along with reducing pilot pressure and backflow traveller 40 being moved to open reflux inlet 14 and bypass outlet 16, load can externally influence down for example moves in response to gravity.
Be in that PCV under the pattern of rocking can realize dangle be that on the other hand load response is in the momentum that brings out during by active drive when load and mobile ability in load.For example, can drive load by importing with short burst fast and periodically of pressure fluid.According to the quality of load and the degree of active input actuator 220 (for example, pressure fluid) driving load,, then can in load, bring out momentum to a certain degree in case cut off the supply of pressure fluid.The prior art that will slattern with this momentum wherein is different, and PCV of the present invention can enter the pattern of rocking, and the momentum that makes load to utilize to be brought out moves an additional distance under without any the situation of initiatively input.In case momentum exhausts and the load stop motion, then can increase pilot pressure to stop the pattern of rocking (for example, closing volume inlet and bypass outlet).Make it surpass load or feedback pressure by increasing pilot pressure, cause thus that the pressure traveller moves to open pressure entrance and pressure export, thereby, can drive this load once more once more to the system supply pressure fluid that can drive load.
The benefit that is in dangling of load when rocking pattern or freely waves ability as PCV is to have realized tangible energy saving, because load can be moved under the effect of gravity or himself momentum, handles the load desired power thereby reduced by expectation.It is remarkable especially to the robot field to rock pattern and advantage thereof, because various robot system can manufacture human the moving and need import by power still less of imitation more critically.
Terminology used here " rocks " or phrase " rocks pattern " and be construed as expression or relate to situation or the state of PCV of the present invention, at this moment, no matter the induced pressure in load actuator position of piston or the actuator how, pilot pressure is always less than the load or the feedback pressure that act on backflow traveller and the pressure traveller, thereby activate the backflow traveller and open reflux inlet and bypass outlet, make fluid between load actuator (perhaps other similar devices of reflux inlet upstream) and bypass outlet fluid downstream liquid-storage container or pipeline, shunt back and forth or to rock by PCV especially these mouths of opening.An example of this state shows in Fig. 3.
With reference to Fig. 4, the sectional view of the cross section longitudinally of the exemplary PCV that describes above showing equally and in Fig. 1, demonstrate, wherein, PCV still operationally is included in the hydraulic actuator system 100.Particularly, Fig. 4 has shown and has been in the not PCV 10 of actuating state that wherein, feedback pressure equals pilot pressure.In this case, backflow traveller 40 rests on the traveller chock 44, thereby closing volume inlet 14 and bypass outlet 16 prevent that fluid from returning and pressure discharges from hydraulic actuator 220 from system 100.In addition, pressure traveller 50 moves to and leans against on the traveller chock 54, thereby closing pressure inlet 18 and pressure export 20 prevent to flow into especially hydraulic actuator 220 of system 100 from the pressure fluid of fluid source (not shown).In this configuration, hydraulic actuator 220 and load 250 transfixions that connect.When only forming pressure reduction on reflux unsteady traveller 40 and pressure float traveller 50, load 250 could be moved.Can perhaps form pressure reduction by increasing or reduce the pilot pressure in the pilot pressure chamber 28 by the induced pressure that increases or reduce effect in the hydraulic actuator 220.
Referring now to Fig. 5, shown another exemplary embodiment of the hydraulic actuator system 100 that wherein is supported with PCV 10.In the present embodiment, PCV 10 comprises principal pressure pipeline 204, one end of this principal pressure pipeline 204 is connected to by load supply line 210 (or output/induced pressure mouth) fluid on the part of actuator 220 of a side of actuator piston 240, and the other end fluid is connected on pressure entrance 18 and pressure export 20 and the feedback port 24.PCV 10 also comprises main reflux pipeline 208, one end of this main reflux pipeline 208 is connected to by backflow load pipeline 214 fluids on the part of actuator 220 of opposite side of actuator piston 240, and the other end fluid is connected on reflux inlet 14 and bypass outlet 16 and the feedback port 22.
In the running, PCV 10 is identical with top discussion and the effect in the embodiment shown in Fig. 1-4.But in the present embodiment, PCV 10 is not communicated with refluxing opening and pressure port fluid.Therefore, if the pilot pressure in the pilot pressure chamber 28 greater than load or feedback pressure on the feedback pressure side 46 and 56 that acts on backflow traveller 40 and pressure traveller 50, pressure traveller 50 moves so, opens pressure entrance 18 and pressure export 20.This makes the pressurized stream physical efficiency from the pressure source (not shown) enter system 100, and passes principal pressure pipeline 204 and load supply line 210 enters actuator 220 drive actuator pistons 240, and is connected to load 250 on the actuator piston 240 with rear driving.On the other hand, be lower than load or feedback pressure in case pilot pressure is reduced to, fluid and pressure pass reflux inlet 14 and bypass outlet 16 discharges from the opposite side of piston 240 from system 100 so.Because pilot pressure is lower than load or feedback pressure, cause that backflow traveller 40 moves with from system's 100 releasing pressurized fluids.Also can optionally control the pressure of the system that is input to from pressure source with respect to pilot pressure, so that PCV 10 normally moves.
Fig. 6-a-6-c has shown several dissimilar example of the limit stoper that can use in PCV 10.Fig. 6-a has shown a plurality of traveller chocks that are shaped as pearl 54-a, described pearl from the inner wall surface of the inner chamber 60 of valve body 12 outstanding and hoop arrange at interval.Fig. 6-b has shown that at least one is shaped as the traveller chock of fritter 54-c, and described fritter is given prominence to and is provided with in place from the internal surface of the inner chamber 60 of valve body 12.Fig. 6-c has shown the traveller chock that is shaped as solid torus, and described solid torus is from the outstanding and hoop extension of inner wall surface of the inner chamber 60 of valve body 12.The those skilled in the art should be appreciated that the limit stoper that can use other type controls moving of backflow traveller described herein and pressure traveller.
Fig. 7 has shown another exemplary embodiment of the PCV 10 that is included in the hydraulic actuator system 100.In the present embodiment, PCV 10 comprises non-linear configurations, wherein, and valve body separated into two parts, just valve body 12-a and valve body 12-b.Although clearly do not describe, also can imagine other non-linear configurations.In the present embodiment, be supported with backflow traveller 40 among the valve body part 12-a, and also be formed with reflux inlet 14 and bypass outlet 16 and feedback port 22 therein.Be supported with pressure traveller 50 among the valve body part 12-b, and also be formed with pressure entrance 18 and pressure export 20 and feedback port 24 therein.
One of feature of present embodiment is to exist mechanical guide system 300, and described mechanical guide system 300 uses mechanical energy to provide guiding force to the pilot pressure side 42 and 52 of backflow traveller 40 and pressure traveller 50 respectively.As shown in the figure, mechanical guide system 300 comprises bias piece 304, and described bias piece 304 provides guiding force with pilot pressure side 42 interactions of backflow traveller 40 and to it.Equally, mechanical guide pressure system 300 comprises similar bias piece 308, and described bias piece 308 provides guiding force with pilot pressure side 52 interactions of pressure traveller 50 and to it.Two bias pieces 304 and 308 preferably have same ratio of rigidity, thereby provide equal power to each backflow traveller 40 and pressure traveller 50.The force application system of known any kind or device all can be used to activate mechanical guidance system 300 to provide guiding force to backflow traveller 40 and pressure traveller 50 in the affiliated field, therefore do not go through at this.
In running, guiding force overcomes and gives fixed load or feedback pressure on the feedback pressure side 46 and 56 that acts on backflow traveller 40 and pressure traveller 50 if desired, and then actuating system 300 is to provide required guiding force.In this state, pressure traveller 50 is caused moving, thereby opens pressure entrance 18 and pressure export 20, and PCV 10 can be worked as mentioned above.Because the existence of traveller chock 34, backflow traveller 40 can not move, but is maintained in its closed position.Mechanical guide system 300 can make pressure traveller 50 move, and simultaneously, because bias piece 304 partial compression, backflow traveller 40 is pushed against on the traveller chock 34, thereby mechanical guide system 300 is fully moved to open pressure entrance 18 and pressure export 20.
On the other hand, pilot pressure is less than given load or feedback pressure if desired, and then system 300 correspondingly activated.In this case, actuating system 300 moves backflow traveller 40, opens reflux inlet 14 and bypass outlet 16 thus.In some cases, system 300 can shut down fully, and at this moment, pressure traveller 50 keeps closing owing to contacting with traveller chock 54.In fact, except using the mechanical guide pressure source but not the direct fluid pressure source, system shown in Figure 7 is identical with system works principle discussed above.
Fig. 8 has shown another exemplary embodiment PCV 410 similar to above-mentioned PCV 10, and both have a little difference.In this specific embodiment, PCV 410 comprises valve body 412, is formed with reflux inlet 414, bypass outlet 416, pressure entrance 418, pressure export 420, first feedback port 592 and second feedback port 596, pilot pressure port 426 and output/induced pressure mouth 610 in the described valve body 412.PCV 410 also comprises the two independent traveller of arranging around the longitudinal axis of valve body 412 usually, and traveller 440 and pressure traveller 450 just reflux.Backflow traveller 440 and pressure traveller 450 freely are provided with and are bearing in the valve body 412 by supporting member 413, described supporting member 413 is configured to make things convenient for moving of traveller 440 and 450, and the motion of described backflow traveller 440 and pressure traveller 450 is subjected to the restriction of one or more limit stoper such as traveller chock 434,444,454 and 455.As can be seen, main fluid pipeline 600 is comprised in the valve body 412, rather than is positioned at the outside of valve body 412 as the exemplary embodiment of Fig. 1.In addition, first feedback port 592 and second feedback port 596 are comprised in the valve body 412 separately.
Another difference of embodiment among this specific embodiment and Fig. 1 is that reflux inlet 414 and bypass outlet 416 depart from mutually.In addition, pressure entrance 418 and pressure export 420 depart from mutually.Depart from although exist, PCV 410 is similar to the method for operation of above-mentioned PCV 10.
In addition, the another one difference is to have the motion of restriction traveller 450 or the 4th limit stoper that moves or traveller chock 455.
Than existing related pressure modulating valve, PCV of the present invention has several advantages.First point, native system focus on the control and the adjusting of pressure, rather than the control and the adjusting of flowing.In fact, FLOW CONTROL is second Consideration of the present invention.Second point, because reponse system is intrinsic, PCV allows operation under very high bandwidth and instability can not occur.Thirdly, because PCV enters the pattern of rocking, energy efficiency is greatly improved.The 4th point, because the control of the height of closed loop torque, system can show the power behavior of its improvement.In other words, because the structure of PCV, system can obtain the obviously high torque (HT) loop gain of improvement under stable situation.The 5th point, PCV make system can obtain the high torque (HT) loop gain, and the ability that dangles is provided simultaneously.This is passive movement performance improvement or that strengthen.The 6th point, PCV can move on seclected time, and does not use or dilute original pressure fluid deposit.In other words, PCV is to use the mobile principal pressure source of preserving of the fluid that is independent of the principal pressure source by not upsetting the principal pressure source.The 7th point, PCV offer system and absorb high capacity keep stable ability simultaneously when high bandwidth.Here other advantage of clearly not describing is conspicuous to those skilled in the art.Equally, should not be construed as in this content of clearly describing is restriction to any way of the present invention.
According to top described, the two independent traveller pressure regulator valve with intrinsic reponse system and dynamic pressure adjusting function of the present invention has solved the many problems in tradition or the conventional servo-system.
Referring now to Fig. 9, shown is the exemplary application of the PCV 410 of Fig. 8.As shown in the figure, Fig. 9 has shown the profile perspective of pressure regulating system 700, and described pressure regulating system 700 comprises a plurality of PCV, promptly is assemblied in four independent PCV together, is shown as PCV 410-a, 410-b, 410-c and 410-d.PCV410 a-d comprises above-mentioned all features and parts, and some of them are shown as feedback pressure mouth 592 and 596, pressure refluxing opening 414 and pressure supply port 418, output/induced pressure mouth 610 and pilot pressure port 426 respectively.
Figure 10 has shown the exemplary application of using the pressure regulating system of Fig. 9.In this concrete application, pressure regulating system 700 is supported in the leg 714 interior and operations therein of exoskeleton (not showing fully), particularly exoskeleton.Pressure regulating system 700 is used to control one or more actuators---and be depicted as actuator 720 and 724, each described actuator is connected in the wirerope drive system respectively.In the wirerope drive system, wirerope 740 and an end of 744 operationally are connected in pulley 750 and 754 respectively, and the other end is connected to actuator 720 and 724.Actuator 720 and 724 is connected to pressure regulating system 700 by output/induced pressure mouth fluid, is connected to more specifically on the independent pressure regulator valve that is contained in the pressure regulating system 700.The pressure of output/induced pressure mouth is used for the interior piston (not shown) of cylinder of drive actuator 720 and 724.Pressure control by working pressure regulating system 700, actuator 720 and 724 is started with driving be connected wirerope 740 and 744 on actuator 720 and 724, thereby make pulley 750 and 754 rotations, be used for limb or leg 714 energy supplies to exoskeleton.Arbitrary or all PCV that comprise in the pressure regulating system 700 can optionally start and control the wirerope drive system.
The concrete exemplary embodiment of top reference is described the present invention in detail.But, should understand, under the situation that does not break away from the scope of the invention that claims illustrate, can carry out various modifications and change.It only is illustrative and nonrestrictive that detailed description and accompanying drawing should be regarded as, and, to revise or change if having, then all this modifications or change will fall within the scope of the present invention of describing herein and illustrating.
More specifically, although described illustrative example embodiment of the present invention at this, the invention is not restricted to these embodiments, but comprise that one of ordinary skill in the art specifically describe intelligible any and whole embodiments through revising, omit, merge (for example, different embodiments' different aspect merges), reorganization and/or replacing according to the front.The content that claim limited should broadly explain according to the language that claim adopts, and should not be limited to that the front describes in detail or the examination of appeal process described in example, described example should be interpreted as non-removing property.For example, in this manual, term " preferably " is non-removing property, and it should represent " preferred but be not limited to ".Arbitrary steps described in any means or the technology claim can be carried out in any order, is not limited to the step described in the claim.Device+function or step-plus-function limit and only can be used for following all scenario and all be documented in the specific rights that limits content and require: a) clearly put down in writing " be used for ... equipment " or " be used for ... step "; B) clearly put down in writing function corresponding; And c) except specification, clearly do not put down in writing structure, the material of supporting this structure or action.Therefore, scope of the present invention should only be limited separately by claims and their legal equivalents, rather than is limited by foregoing description and example.
What claim and hope patented and protects theing contents are as follows.
Claims (41)
1. pressure regulator valve that is used to regulate the servo-system internal pressure, described pressure regulator valve comprises:
Valve body is formed with the reflux inlet and outlet, pressure entrance and outlet and first and second feedback port that are communicated with the cavity fluid of described valve body in the described valve body;
The backflow traveller of free end bearing in described valve body, described backflow traveller are configured to flow by described reflux inlet and outlet regulating fluid;
Be independent of described backflow traveller and with the described backflow traveller pressure traveller of free end bearing in described valve body relatively, described pressure traveller is configured to flow by described pressure entrance and outlet regulating fluid;
The intrinsic pressure reponse system, described intrinsic pressure reponse system is configured to move in response to acting on pilot pressure on described backflow traveller and the pressure traveller and the pressure reduction between the feedback pressure simultaneously described backflow traveller and pressure traveller, described intrinsic pressure reponse system is used to eliminate described pressure reduction, thus described pilot pressure of balance and described feedback pressure; And
Be arranged on the limit stoper in the described valve body, described limit stoper is configured to determine backflow traveller and the limit position of pressure traveller in described valve body described in the running.
2. pressure regulator valve as claimed in claim 1 is characterized in that: described valve body comprises the built-in linear structure, and described backflow traveller and pressure traveller are arranged around the longitudinal axis of described valve body.
3. pressure regulator valve as claimed in claim 1 is characterized in that: described valve body comprises non-linear configurations.
4. pressure regulator valve as claimed in claim 1 is characterized in that: the geometric configuration basically identical of the geometric configuration of described backflow traveller and pressure traveller and the described inner chamber of described valve body.
5. pressure regulator valve as claimed in claim 1 is characterized in that: described backflow traveller and pressure traveller have predetermined quality.
6. pressure regulator valve as claimed in claim 1, it is characterized in that: described backflow traveller and pressure traveller comprise pilot pressure side and feedback pressure side separately, wherein, described pilot pressure side is communicated with the pilot pressure fluid and is configured to receive described pilot pressure, and described feedback pressure side is communicated with the feedback pressure fluid and is configured to receive described feedback pressure.
7. pressure regulator valve as claimed in claim 6, it is characterized in that: described pressure regulator valve also comprises the pilot pressure chamber that is included in the described inner chamber, this pilot pressure chamber is configured to receive the described pilot pressure from the pilot pressure source, and described pilot pressure source is communicated with and is communicated with described cavity fluid with described pilot pressure chamber fluid by the pilot pressure port that is formed in the described valve body.
8. pressure regulator valve as claimed in claim 7 is characterized in that: described pilot pressure chamber is formed by the part that is communicated with described pilot pressure side liquid described backflow traveller and pressure traveller described inner chamber.
9. pressure regulator valve as claimed in claim 6 is characterized in that: the described feedback pressure side of described backflow traveller and pressure traveller respectively be formed at described valve body in the described first and second feedback port fluids be communicated with.
10. pressure regulator valve as claimed in claim 7 is characterized in that: described pilot pressure source comprises source of pressurised fluid.
11. pressure regulator valve as claimed in claim 7 is characterized in that: described pilot pressure source comprises the mechanical pressure source.
12. pressure regulator valve as claimed in claim 7 is characterized in that: by the described pilot pressure port of pilot pressure valve regulation.
13. pressure regulator valve as claimed in claim 12 is characterized in that: described pilot pressure source structure becomes to the variable pressure of described pilot pressure chamber supply by described pilot pressure valve control.
14. pressure regulator valve as claimed in claim 1 is characterized in that: described pilot pressure is used as pilot pressure so that form described pressure reduction.
15. pressure regulator valve as claimed in claim 1 is characterized in that: can change described pilot pressure as required, to control and to handle the state and the operation thereof of described pressure regulator valve.
16. pressure regulator valve as claimed in claim 1 is characterized in that: described intrinsic pressure reponse system is a feedback system fluid.
17. pressure regulator valve as claimed in claim 1, it is characterized in that: described limit stoper comprises the traveller chock, this traveller chock is arranged in the described inner chamber and is fixed on the inner wall surface of described inner chamber, so that limit the motion of described backflow traveller and pressure traveller.
18. pressure regulator valve as claimed in claim 17 is characterized in that: described traveller chock is selected from annular ring, a series of fritter and single fritter.
19. pressure regulator valve as claimed in claim 1 is characterized in that: at least some described limit stoper are configured to stop moving of described backflow traveller during greater than described feedback pressure at described pilot pressure.
20. pressure regulator valve as claimed in claim 1 is characterized in that: at least some described limit stoper are configured to stop moving of described pressure traveller during less than described feedback pressure at described pilot pressure.
21. pressure regulator valve as claimed in claim 7 is characterized in that: at least some described limit stoper are configured to stop the mobile to cut out described pilot pressure port of described backflow traveller.
22. pressure regulator valve as claimed in claim 1, it is characterized in that: described pressure regulator valve also comprises the main fluid pipeline that is communicated with described reflux inlet and described pressure export and the described first and second feedback port fluids, and described main fluid pipeline is configured to by the load supply line load actuator fluid is connected on the described pressure regulator valve.
23. pressure regulator valve as claimed in claim 1, it is characterized in that: described pressure regulator valve also comprises the pressure release mode that is limited by the pressure reduction state in the described pressure regulator valve, wherein, described pilot pressure is less than described feedback pressure, cause described backflow traveller to move and open described reflux inlet and outlet thus, so that discharge the pressure of described servo-system and eliminate described pressure reduction.
24. pressure regulator valve as claimed in claim 1, it is characterized in that: described pressure regulator valve also comprises the actuation patterns that is limited by the pressure reduction state in the described pressure regulator valve, wherein, described pilot pressure is greater than described feedback pressure, cause described pressure traveller to move and open described pressure entrance and outlet thus, so that the pressure fluid from source of pressurised fluid is entered to eliminate described pressure reduction, increase the pressure in the described servo-system thus and drive load.
25. pressure regulator valve as claimed in claim 1, it is characterized in that: described pressure regulator valve also comprises the pattern of rocking that is limited by the pressure reduction state in the described pressure regulator valve, wherein, described pilot pressure is kept and is lower than described feedback pressure, cause described backflow traveller to move and open described reflux inlet and outlet thus, so that make fluid shunting back and forth under low energy consumption state.
26. a pressure regulator valve comprises:
The unsteady backflow traveller that is configured in valve body, move freely;
Be configured to the floating pressure traveller that in described valve body, moves freely, described unsteady backflow traveller and floating pressure traveller are structurally separate and be independent of described valve body, described pressure regulator valve is configured to regulate pressure by intrinsic reponse system, this intrinsic reponse system is configured to move inherently and systematically in response to the pilot pressure on the opposite side that acts on each described backflow traveller and pressure traveller and the pressure reduction between the feedback pressure at least one in described backflow traveller and the pressure traveller, to eliminate described pressure reduction and to make described pilot pressure and described feedback pressure equates; And
Be arranged on the limit stoper in the described valve body, described limit stoper is configured to determine backflow traveller and the limit position of pressure traveller in described valve body described in the described pressure regulator valve running.
27. pressure regulator valve as claimed in claim 26, it is characterized in that: described pilot pressure is supplied by variable pilot pressure source, described variable pilot pressure source is communicated with described unsteady backflow traveller and floating pressure traveller fluid by the pilot pressure port that is formed in the described valve body, described pilot pressure is regulated by pilot valve, described pilot valve is configured to the described pilot pressure of control action on described unsteady backflow traveller and floating pressure traveller, changes described pilot pressure so that optionally generate and control described pressure reduction.
28. pressure regulator valve as claimed in claim 26, it is characterized in that: described feedback pressure is supplied by variable load pressure, described variable load pressure is communicated with described unsteady backflow traveller and floating pressure traveller fluid by the feedback port that is formed in the described valve body, changes described induced pressure so that optionally generate and control described pressure reduction.
29. pressure regulator valve as claimed in claim 26 is characterized in that: described intrinsic reponse system comprises:
First and second feedback cavity that are connected with the feedback pressure side liquid separately of described unsteady backflow traveller and floating pressure traveller;
First and second feedback port, described first and second feedback port are formed in the described valve body, and are communicated with described first and second feedback cavity and the first and second feedback line fluids respectively;
The main fluid pipeline that is communicated with the described first and second feedback line fluids;
The load supply line that is communicated with described main fluid pipeline and load energy converting system fluid, described load energy converting system is configured to load force is converted to induced pressure, the described feedback pressure of described induced pressure decisive action on the described feedback pressure side of described unsteady backflow traveller and floating pressure traveller;
The directed cavity that is communicated with the pilot pressure side liquid separately of described unsteady backflow traveller and floating pressure traveller; And
Be formed in the described valve body and the targeting port that is communicated with the pilot valve fluid, described pilot valve is communicated with the pilot pressure source fluid that is configured to supply to described directed cavity described pilot pressure, and described pilot valve is configured to control and changes described pilot pressure.
30. pressure regulator valve as claimed in claim 26 is characterized in that: when described pressure reduction for making described feedback pressure surpass and when overcoming described pilot pressure, described backflow traveller moves.
31. pressure regulator valve as claimed in claim 26 is characterized in that: when described pressure reduction for making described pilot pressure surpass and when overcoming described feedback pressure, described pressure traveller moves.
32. pressure regulator valve as claimed in claim 26 is characterized in that: described unsteady backflow traveller and floating pressure traveller are configured in response to described intrinsic reponse system two-way back and forth move and can not become unstable on bigger bandwidth.
33. a pressure regulator valve comprises:
Valve body is formed with pressure entrance and outlet and reflux inlet and outlet in valve body;
The backflow traveller that is arranged in the described valve body and is configured to flow by described reflux inlet and outlet regulating fluid, described backflow traveller have pilot pressure side and load feedback on the pressure side;
Relative with described backflow traveller and be independent of this backflow traveller and be arranged on pressure traveller in the described valve body, described pressure traveller is configured to flow by described pressure entrance and outlet regulating fluid, and described pressure traveller also has pilot pressure side and load feedback on the pressure side; And
Be arranged on the limit stoper in the described valve body, this limit stoper is configured to determine the limit position of described backflow traveller and pressure traveller,
Described backflow traveller and pressure traveller can move to open and close described reflux inlet and outlet and pressure entrance and outlet inherently and systematically, so that eliminate described pressure reduction in response to the pilot pressure on described pilot pressure side that acts on described backflow traveller and pressure traveller simultaneously respectively and the induced pressure side and the pressure reduction between the feedback pressure.
34. a pressure regulator valve comprises:
Valve body is formed with pressure entrance and outlet and reflux inlet and outlet in valve body;
Be configured to by described reflux inlet and the mobile backflow traveller of outlet regulating fluid, described backflow traveller has pilot pressure side and feedback pressure side;
Be independent of described backflow traveller and the pressure traveller relative with this backflow traveller in described valve body, described pressure traveller is configured to flow by described pressure entrance and outlet regulating fluid, and described pressure traveller also has pilot pressure side and load feedback on the pressure side;
Between the described pilot pressure side of described backflow traveller and pressure traveller and by the fixed pilot pressure chamber of the described pilot pressure lateral confinement of described backflow traveller and pressure traveller, described pilot pressure chamber is communicated with the pilot pressure source fluid, described pilot pressure source structure becomes to provide variable pilot pressure in described pilot pressure chamber, on the described pilot pressure side that acts on described backflow traveller and pressure traveller;
Be formed in the described valve body and first feedback port that is communicated with the described feedback pressure side liquid of described backflow traveller;
Be formed in the described valve body and second feedback port that is communicated with the described feedback pressure side liquid of described pressure traveller;
The main fluid pipeline that is communicated with described bypass outlet and pressure export and the described first and second feedback port fluids;
The load supply line that is communicated with described main fluid pipeline and load energy converting system fluid, described load energy converting system comprises the variable load pressure that is configured to apply variable feedback pressure on the described feedback pressure side of described backflow traveller and pressure traveller therein, wherein, described feedback pressure can be different with described pilot pressure, thereby formation pressure reduction, this pressure reduction makes described backflow traveller and pressure traveller move, thereby optionally open described pressure entrance and outlet and reflux inlet and outlet, thereby described pilot pressure of balance and induced pressure with elimination pressure reduction;
Be connected in described valve body and be positioned at backflow traveller chock on the described feedback pressure side of described backflow traveller, the mobile position that described backflow traveller chock is configured to limit described backflow traveller, thereby when described pilot pressure during greater than described feedback pressure, described reflux inlet and be exported to small part and close; And
Be connected in described valve body and be positioned at pressure traveller chock on the described pilot pressure side of described pressure traveller, the mobile position that described pressure traveller chock is configured to limit described pressure traveller, thereby when described pilot pressure during less than described feedback pressure, described pressure entrance and be exported to small part and close.
35. a method that is used to regulate and control servo type system internal pressure, described method comprises:
The pressure regulator valve that has valve body and freely be arranged on independently reflux traveller and pressure traveller in the described valve body is provided, described pressure regulator valve also comprises the limit stoper that is arranged in the described valve body, described limit stoper is configured to determine backflow traveller and the limit position of pressure traveller in described valve body described in the described pressure regulator valve running, described backflow traveller and pressure traveller comprise pilot pressure side and feedback pressure side separately, and are configured to separately respectively to flow by being formed at reflux inlet in the described valve body and outlet and pressure entrance and outlet regulating fluid;
Described pilot pressure side supply pilot pressure to described backflow traveller and pressure traveller;
Described feedback pressure side supply feedback pressure to described backflow traveller and pressure traveller; And
On the described pilot pressure side of described backflow traveller and pressure traveller and feedback pressure side, bring out pressure reduction, in described backflow traveller and the pressure traveller at least one moved, to eliminate described pressure reduction and to make described pilot pressure and described feedback pressure equates in response to described pressure reduction.
36. method as claimed in claim 35, it is characterized in that: described bringing out comprises that handling described pilot pressure makes it to surpass described feedback pressure, cause described pressure traveller to open described pressure entrance and export thus, so that described pilot pressure and described feedback pressure are equated with the input pressure fluid.
37. method as claimed in claim 35, it is characterized in that: described bringing out comprises that handling described pilot pressure makes it less than described feedback pressure, cause described backflow traveller to move opening described reflux inlet and outlet thus, thereby releasing pressurized fluid is so that make described pilot pressure and described feedback pressure equates.
38. method as claimed in claim 35, it is characterized in that: described method comprises that also the described pilot pressure of maintenance is lower than described feedback pressure, cause described backflow traveller to open described reflux inlet and outlet thus, thereby allow that described pressure regulator valve enters low energy consumption and rocks pattern, this schema construction becomes to make fluid to pass through described reflux inlet and outlet shunting back and forth, so that fluid coupled is freely waved to the actuatable load on the pressure regulator valve.
39. one kind is used for introducing Passively activated method in servo or servo type system, comprises:
Load actuator is provided, and this load actuator is connected in the load and is configured to transformed load pressure and load force back and forth;
The pressure regulator valve that is communicated with described load actuator fluid is provided, described pressure regulator valve has valve body, freely be arranged on independently backflow traveller and pressure traveller in the described valve body, and be arranged on limit stoper in the described valve body, described limit stoper is configured to determine backflow traveller and the limit position of pressure traveller in described valve body described in the described pressure regulator valve running, described backflow traveller and pressure traveller comprise pilot pressure side and feedback side separately, and are configured to separately flow by being formed at reflux inlet in the described valve body and outlet and pressure entrance and outlet regulating fluid respectively according to intrinsic machine feedback system;
Described pilot pressure side supply pilot pressure to described backflow traveller and pressure traveller;
To the described feedback side supply feedback pressure of described backflow traveller and pressure traveller, described feedback pressure is corresponding to the described induced pressure that is provided by described load actuator; And
Handle described pilot pressure and make it to be lower than described feedback pressure, cause described pressure regulator valve to enter Passively activated thus or rock pattern, wherein, described pressure traveller is closed, described backflow traveller is opened, and makes fluid pass through described reflux inlet and outlet directly shunting back and forth between described pressure regulator valve and described load actuator thus.
40. method as claimed in claim 39 is characterized in that: described method comprises that also keeping described pilot pressure is lower than described feedback pressure in the section at the fixed time, so that described pressure regulator valve is maintained the described pattern of rocking.
41. method as claimed in claim 39 is characterized in that: described method also comprises the gain of boost pressure modulating valve, so that realize soft dynamic duty performance.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63300104P | 2004-12-02 | 2004-12-02 | |
| US60/633,001 | 2004-12-02 | ||
| US11/293,413 | 2005-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101111685A CN101111685A (en) | 2008-01-23 |
| CN100572825C true CN100572825C (en) | 2009-12-23 |
Family
ID=39043074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800475885A Expired - Fee Related CN100572825C (en) | 2004-12-02 | 2005-12-02 | Pressure regulator valve with intrinsic reponse system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100572825C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO336424B1 (en) | 2010-02-02 | 2015-08-17 | Statoil Petroleum As | Flow control device, flow control method and use thereof |
| CN106969003A (en) * | 2017-04-12 | 2017-07-21 | 上海与德科技有限公司 | Servicing unit for radio circuit matching and debugging |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2861550A (en) * | 1952-10-28 | 1958-11-25 | Westinghouse Electric Corp | Hydraulic power control valve |
| US4067357A (en) * | 1974-06-14 | 1978-01-10 | Herion-Werke Kg | Pilot-operated directional control valve |
| US4266466A (en) * | 1976-12-01 | 1981-05-12 | The Claas Ogh | Hydraulic valve device |
| US4362018A (en) * | 1980-06-12 | 1982-12-07 | Kobe Steel, Ltd. | Hydraulic rotation control circuit |
-
2005
- 2005-12-02 CN CNB2005800475885A patent/CN100572825C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2861550A (en) * | 1952-10-28 | 1958-11-25 | Westinghouse Electric Corp | Hydraulic power control valve |
| US4067357A (en) * | 1974-06-14 | 1978-01-10 | Herion-Werke Kg | Pilot-operated directional control valve |
| US4266466A (en) * | 1976-12-01 | 1981-05-12 | The Claas Ogh | Hydraulic valve device |
| US4362018A (en) * | 1980-06-12 | 1982-12-07 | Kobe Steel, Ltd. | Hydraulic rotation control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101111685A (en) | 2008-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101784799B (en) | Pressure control valve having an asymmetric valving structure | |
| EP1828621B1 (en) | Pressure control valve having intrinsic mechanical feedback system | |
| US8051764B2 (en) | Fluid control system having selective recruitable actuators | |
| US7308848B2 (en) | Pressure control valve having intrinsic feedback system | |
| CA2219207C (en) | Pressure compensating hydraulic control system | |
| US5791142A (en) | Hydraulic control valve system with split pressure compensator | |
| CN101278129B (en) | Hydraulic system having augmented pressure compensation | |
| CN106593837B (en) | Hydraulic planger pump Variable Control structure and its control method | |
| CN105545852B (en) | High-speed switch pilot proportioning valve | |
| CN100572825C (en) | Pressure regulator valve with intrinsic reponse system | |
| JPS60501171A (en) | Control valves and hydraulic equipment using them | |
| ATE450714T1 (en) | DIRECTIONAL VALVE WITH PRESSURE COMPENSATOR | |
| US10794512B2 (en) | Electrically-driven flow rate control valve | |
| CN206957907U (en) | Hydraulic planger pump Variable Control structure | |
| EP3112697B1 (en) | Hydrostatic systems with shuttle valve for compensating differential flow rate of single-rod actuators | |
| CN212717444U (en) | Hydraulic control system and work vehicle | |
| KR101366382B1 (en) | Pressure regulating amplifier | |
| US8061261B2 (en) | Antagonistic fluid control system for active and passive actuator operation | |
| CN101278132A (en) | Hydraulic control device | |
| RU2311567C1 (en) | Electro-hydraulic tracking drive | |
| JP2002196826A (en) | Backflow validating reducing valve | |
| CN112814692B (en) | Shield machine and posture deviation rectifying system thereof | |
| CN114688120A (en) | Hydraulic assembly, multi-way valve and engineering machinery | |
| CN113124006A (en) | Hydraulic system for continuously adjusting rock drilling power | |
| JPH03125003A (en) | Hydraulic motor control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: RAYTHEON SAX COMPANY Free format text: FORMER OWNER: SARCOS L.C. Effective date: 20080725 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080725 Address after: Massachusetts, USA Applicant after: Raytheon Sarcos LLC Address before: American Utah Applicant before: Sarcos Invest LC |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20151202 |
|
| EXPY | Termination of patent right or utility model |