CN100504080C - Hydraulic current divider and flow metering device of flow storage device - Google Patents

Abstract

The invention relates to a variable metering orifice for a current divider and current adding device. The metering orifice arrangement comprises one or several working connections which supply, respectively, a pressure fluid with pressure means. The metering orifice comprises one metering orifice piston which can be impinged upon by control pressure which is picked up from between two throttle valves of a pressure divider and at least one of the throttle valves can be modified.

Description

Hydraulic divider and the metering orifice device that holds the stream device

Technical field

The present invention relates to a kind of metering orifice device (metering orifice arrangement) and have the shunt (current divider) of this kind metering orifice device and hold stream device (currentadding device).

Background technique

Hydraulic divider guarantees that the given hydraulic fluid stream that is subjected to is independent of induced pressure according to a plurality of hydraulic consumers (consumer) or the hydraulic load of the component stream of expecting through device parallel to each other.If be subjected to hydraulic fluid stream to be directed making that the individual flows metered valve of shunt is positioned in the upstream of hydraulic consumer, then be referred to as the triage operator state.Yet,, be referred to as to hold the flow operation state if the individual flows metered valve is set at the downstream of hydraulic consumer.

Each Flow valve of shunt comprises that all one is measured a mouth and a pressure regulator (pressureregulator), and pressure regulator places the downstream of measuring mouth when shunting.During shunting, have the metering orifice and the stream of the liquid between the load of maximum load pressure and restriction correspondence on the closing direction of pressure regulator, this restriction is so strong, causes all metering orifices pressure afterwards to equal or a little higher than maximum load pressure.For this configuration and the application of pressure regulator, for example, such as among the WO 95/32364 announcement, shunt is similar to so-called LUDV (being independent of the assignment of traffic of induced pressure) control system, it is a special case of load sensor control system.In this control system,, and control this variable displacement pump and make the leading pump pressure in the pump piping (pump conduit) be higher than induced pressure with predetermined pressure difference Δ p to variable displacement pump indication maximum load pressure.In the LUVD control system, even pump pressure decline also still keeps the distribution to indivedual shuntings.Because under the under-supply situation of this meaning, the pressure in metering orifice downstream is without any change.Apply the pump pressure that has descended before the metering orifice in the same way, thereby the pressure reduction at all metering orifice places is changed in an identical manner.

No matter be to use metering pump or variable displacement pump,, can use shunt no matter also how variable displacement pump is conditioned as source of pressurized fluid.For example, when being used for transmission, discharge capacity is regulated, and subsequently it is pro rata distributed to the hydraulic pressure consumer with desired volume ratio in response to the deflection of operating handle or pedal.

Can't carry out compression fluid component " holding stream " according to the control system of WO 95/32364.Because when savings liquid flow component, must guarantee pressure minimum leading between pressure regulator and the consumer and no longer be that pressure maximum is applied on the pressure regulator by closing direction.

In DE 195 31 497 A1, disclosed a kind of shunt that is used for shunting and holding stream.In this control gear, the pressure regulator of distributing to consumer is headed into an open position by aligning spring (centering spring), in " shunting " serviceability, pressure regulator is applied maximum load pressure, and in " holding stream " serviceability, pressure regulator is applied corresponding minimum useful load pressure, thereby make the pressure loss on the metering orifice in these two kinds of serviceability, can be independent of induced pressure and keep constant via pilot valve.

By the shunting of a kind of as can be known hydraulic pressure of DE 34 01 754 C2 with hold the stream device, each consumer in this device (for example oil hydraulic motor of stroke driving device) all is furnished with a pressure regulator, can be with the pressure limit in fixing metering orifice downstream at induced pressure via this pressure regulator in when shunting.

In DE3117815A1, disclose and a kind ofly comprise the shunting of a metering orifice device and hold the stream device, this shunting and hold the stream device and comprise shared first operational terminal at pump side, and comprise a plurality of second operational terminals in the consumer side.The single metering orifice piston of this metering orifice device heads into operating position by the aligning spring assembly and comprises two control edges, and one of them works when shunting, and another works when holding stream.The ear end face of metering orifice piston enters a control chamber that can be applied in pilot pressure, and this pilot pressure is by extending between first operational terminal and control chamber and comprising that the controlling plumbing fixtures of fixed restrictive valve and safety check is applied.

Above-mentioned be applicable to the shunting and hold in the technological scheme of flow operation, the pressure regulator piston of distributing to the pressure regulator of consumer is positioned at the different control position of depending on single induced pressure.Logical pressure regulator piston is pushed into its home position (for example in the home position is open) by more weak relatively spring (pressure is equivalent to the 1-3 crust).In (shunting) operation period, have minimum load pressure consumer pressure regulator closed position near control the edge, thereby with other pressure regulator with higher load device in closed position near the control edge, thereby have higher bearing at the spring of the pressure regulator of pressure with other and compare, the degree that the spring of this pressure regulator is offset is bigger.Therefore, for example, the spring tension of minimum load pressure consumer is 3 crust, and the spring tension of highest load pressure consumer is 1.5 crust.These different spring tensions cause indivedual metering orifices different with the regional ground pressure between the relevant pressure regulator, thereby pressure on the corresponding metering orifice are fallen and also respective change of consequent compression fluid volume flow.That is, be under the situation of 1.5 crust in the spring bias difference, the pressure difference at single metering orifice place also will produce corresponding the variation.If the pressure on the corresponding metering orifice falls higher relatively, then the deviation that is caused by different pressure regulator spring tensions can be ignored.Yet, comparatively speaking, to fall under the lower situation at the pressure on the metering orifice, above-mentioned deviation is bigger, and the consumer flow is being shunted/cause occurring error during holding stream.For example, the error of this amount can cause stroke driving device that undesirable slip takes place.

Summary of the invention

Comparatively speaking, the object of the present invention is to provide a kind of metering orifice device and a kind of amount error with this kind metering orifice device hydraulic divider and hold the stream device changeably.

For achieving the above object, metering orifice device among the present invention, comprise the metering orifice device, it comprises metering orifice match alive (52), this metering orifice piston (52) is controlled the one or more variable metering orifice (40,42,44,46) of location parallel to each other on each metering orifice, in the described metering orifice each all is positioned between second operational terminal (A, B, C, D) that shared first operational terminal (P) and is positioned at the consumer side, and is applying leading pressure in described first terminal (P) to it on the first direction; Comprise that a can regulate that is positioned between described first terminal (P) and the described operational terminal (A, B, C, D) divides hydraulic circuit, described can regulate divides hydraulic circuit to comprise at least two throttle valve so that produce leading pressure in described first terminal (P) and the pilot pressure between the leading pressure in the described operational terminal (A, B, C, D), this pilot pressure can be applied to described metering orifice piston (52) on the second direction opposite with described first direction; And comprise an aligning spring assembly (54), can make described metering orifice piston (52) be centered at the central position by this aligning spring assembly (54), be closed at the described metering orifice of this center position (40,42,44,46), the flow cross section of at least one in two throttle valve of described minute hydraulic circuit is variable.

For hydraulic divider with hold for the stream device, comprise at least two consumers (1,2), described consumer (1,2) can be connected so that in one direction the compression fluid volume is shunted and in the opposite direction stream is held in shunting; Comprise the pressure demodulator (8,10) of distributing to each consumer (1,2); And comprise a metering orifice device, the metering orifice device comprises metering orifice match alive (52), this metering orifice piston (52) is controlled the one or more variable metering orifice (40,42,44,46) of location parallel to each other on each metering orifice, in the described metering orifice each all is positioned between second operational terminal (A, B, C, D) that shared first operational terminal (P) and is positioned at the consumer side, and is applying leading pressure in described first terminal (P) to it on the first direction; Comprise that a can regulate that is positioned between described first terminal (P) and the described operational terminal (A, B, C, D) divides hydraulic circuit, described can regulate divides hydraulic circuit to comprise at least two throttle valve so that produce leading pressure in described first terminal (P) and the pilot pressure between the leading pressure in the described operational terminal (A, B, C, D), this pilot pressure can be applied to described metering orifice piston (52) on the second direction opposite with described first direction; And comprise an aligning spring assembly (54), can make described metering orifice piston (52) be centered at the central position by this aligning spring assembly (54), be closed at the described metering orifice of this center position (40,42,44,46), the flow cross section of at least one in two throttle valve of described minute hydraulic circuit is variable; Wherein metering orifice (40,42,44,46) is distributed to a plurality of consumers or a consumer simultaneously.

Metering orifice device according to the present invention comprises a metering orifice piston, and it is used to control the one or more variable metering orifice that each liquid stream flows to.Each variable metering orifice all is configured in common first terminal (pump terminal) and between the operational terminal of consumer side.The metering orifice piston is subjected to the pressure of pump terminal on the one hand, is subjected to the pilot pressure that the branch hydraulic circuit between pump terminal and the operational terminal is discharged on the other hand.In technological scheme of the present invention, this minute hydraulic circuit comprise a variable throttle valve at least, can regulate the pressure of control in the chamber by this variable throttle valve, thereby make the leading pressure that the cross section of metering orifice can the response pump end and change.For the amount error of being mentioned above reducing as far as possible, the variation pattern of this variable throttle valve is: the pressure of the ingress of metering orifice (pump terminal) increases, and the pressure drop on the metering orifice also suitably increases, therefore because the error that the skew of the difference of pressure regulator spring causes is also less relatively.Adopt this mode, for example, can stroke be driven the slip that takes place under unfavorable operational condition with the equipment cost of minimum and drop to minimum.

But, when the consumer of control connection consequently allows normal travel operation period generation slip, still may produce relatively large error.

According to the present invention, particularly advantageous is that variable throttle valve is designed to settle in continuous variable pilot valve (pilot valve) and the control oil flow path between first terminal (pump terminal) and pilot valve the throttle valve with constant cross-section.

In a preferred embodiment of the invention, the metering orifice piston is imported in the metering orifice sleeve pipe (sleeve), forms in this sleeve pipe and distributes to corresponding operational terminal, promptly distributes to the window of corresponding consumer, and these windows are opened by the control of metering orifice piston.The partial volume of each consumer has been determined to flow in cross section in these windows.

In a preferred embodiment, the metering orifice piston comprises two control edges, and one of them control edge works during shunting, and another control edge works during holding stream.Hold the preferably annular shoulder of metering orifice piston of current control edge.

Difference is as much as possible little in order to keep-up pressure during holding stream; form a plurality of axis holes (axial bore) in the place ahead of metering orifice piston; these axis holes feed the circular groove (annulargroove) that forms aforementioned annular shoulder, so just guarantee that the leading pressure in the annular cavity is corresponding with the leading pressure of metering orifice front side input end or pump terminal.

The metering orifice piston limits the control chamber at the rear portion, this control chamber is connected with the pump terminal of metering orifice via control channel.In this control channel, be provided with the ozzle of branch hydraulic circuit.

Pilot valve can be with the variation of stepping, thereby the flow cross section that makes the flow measurement product is also correspondingly with the variation of stepping.

In a particularly preferred embodiment, pilot line is drawn arm in the downstream of pilot valve, and each leads in the arm of service line and all disposes metering orifice.

The aligning spring structure that heads into its home position when the metering orifice piston is done the time spent on the cup-shaped latch plate, the end of the aligning spring of the aligning spring structure reception chamber that the shroud of latch plate limits that submerges fully, so this metering orifice device has special compact structure.In order to prevent to be mingled with control oil in this reception chamber, in shroud, form the shroud hole.

In a modification of the present invention, control gear comprises a free path selection device, and all working pipeline in this free path selection device all is connected to each other.Can in metering orifice, realize this free path at an easy rate according to the present invention, because the metering orifice sleeve pipe in the valve opening of valve pocket by sliding guidance, and can move to the another location by the home position by pilot pressure, the passage measured stream muzzle pipe that is connected with metering orifice sleeve pipe window in this position valve pocket is opened and short circuit.

Can adopt thread plug that metering orifice is fixed, thereby this free path is stopped up.

When the axis of pilot valve and metering orifice axis met at right angles, this metering orifice device had very compact project organization.

Other technologies feature of the present invention embodies in the dependent claims.

Description of drawings

Fig. 1 has showed the Block Diagram of the LUVD control gear of two consumers.

Fig. 2 is a schematic representation of distributing to the variable flow measurement hole of a plurality of consumers.

Fig. 3 is the sectional view of the specific embodiment in flow measurement shown in Figure 1 hole.

Fig. 4 is the detail drawing in variable flow measurement shown in Figure 3 hole.

Fig. 5 is the Block Diagram that each consumer all is assigned the control gear in a variable flow measurement hole.

Fig. 6 is according to a valve piece in the loop of Fig. 5.

1,2: oil hydraulic motor 4: mobile controll block

6: variable displacement pump 8,10: pressure regulator

12: metering orifice 14: supply pipeline

16,18,48,50: leading pipeline 20: pilot valve

22: free path selection device 24: service pump

26: feeding pipeline 28,30: force feed valve

32: load indication pipeline 34,36: position control valve

38: metering orifice sleeve pipe 40,42,44,46: window

52: metering orifice piston 54: the aligning spring assembly

56: lower end surface 50: upper-end surface

60: control chamber 62: control channel

64: ozzle 66: circular groove

68: annular cavity 70: transverse holes

71: pilot line 72,74,76,78: hole

80,82: control edge 84: pilot valve axis

86: metering orifice axis 88: the valve hole

90: radial protrusion 92: spring

94: shoulder 96,124: thread plug

98: supply passage 100: the guiding valve opening

101,103: pressure chamber 102: anti-twisting equipment

104: elliptical aperture 106: outlet terminal

108: access ramp 110: annular groove

112: spring chamber 114: control hole

116: free path control edge 118: aligning spring

120: axis projection 122: latch plate

126: cup-shaped latch plate 128: shoulder radially

130: shroud 132: the shroud hole

134: run through 135: annular shoulder

138: end 140: piston hole

142: axial bore 144: transverse holes

146: pressure regulator piston 148: annular end face

150: inner circular bead

Embodiment

Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.

Principle of the present invention especially can be used for having the mechanical device that the hydrostatic of closed or open oil hydraulic circuit drives, and is mainly used in drive unit, and for example stroke drives, winch drives or belt drives.

Figure 1 shows that the circuit diagram of the control gear that the stroke of mobile working device drives.Control gear is the loop of a sealing, and stroke drives and comprises two oil hydraulic motors 1,2, and it is connected with variable displacement pump 6 by mobile controll block 4.By mobile controll block 4 compression fluid is assigned to oil hydraulic motor 1,2 by variable displacement pump 6, moving in the controll block 4 independently at this, pressure regulator 8,10 is assigned to each oil hydraulic motor 1,2.Be provided with variable metering orifice device before two pressure regulators 8,10, be designated hereinafter simply as metering orifice 12, by this metering orifice 12, the compression fluid volume flow of sending into supply pipeline 14 is divided into two stocks stream and is introduced into oil hydraulic motor 1,2 through two working lines or leading pipeline 16,18.Discharge pipe 20 draws from oil hydraulic motor gets back to variable displacement pump 6.

In the illustrated embodiment, the metering orifice 12 of distributing to two pressure regulators 8,10 has a guiding project organization, wherein regulates pilot valve 20 as the ratio of adjustable restrictive valve and the pilot pressure that serves as jointly between the ozzle 64 of voltage divider is discharged from.And, also a free path selection device 22 being distributed to metering orifice 12 also, two leading pipelines 16,18 can be connected together by this metering orifice 12.

Among the described hereinafter embodiment, free path selection device 22, pilot valve 20 and flow measurement hole 12 are integrated in the valving.

Variable displacement pump 6 is furnished with an auxilliary pump 24, compression fluid can be sent into by what two voltage supply valves 28 and 30 were connected to two leading pipelines 16,18 by groove T by this auxilliary pump 24 and be fed pipeline 26.By these voltage supply valves 28,30, when tractive load (descending driving), for example, can suck compression fluid by groove T, produce cavity so that avoid in the leading pipeline 16,18.And by two voltage supply valves 28,30, the pressure in the leading pipeline 16 and 18 is limited in maximum value respectively, thereby the protection consumer does not transship.

Control gear shown in Figure 1 will be operated under " shunting " and " holding stream " serviceability.When the triage operator state, the tested head piece 12 of the compression fluid volume flow of supply pipeline 14 is divided into component volume stream, and introduces the consumer 1 and 2 that is distributed respectively by pressure regulator 8, 10.By pressure regulator 8,10 pressure on the shared metering orifice 12 is fallen and keep constant and irrelevant, thereby make the compression fluid volume flow of the metering orifice 12 of flowing through only depend on the open cross-sections of each each self-forming of consumer with induced pressure.

The basic structure of two pressure regulators 8,10 of opening in the home position is open in number of patent application DE 10 2,004 001253, therefore only partly describe helping to understand technical characteristics of the present invention here, other guide can be with reference to above-mentioned patent application or its priority application subsequently early.These pressure regulators 8,10 have two control edges, and one of them control edge works in " shunting " serviceability, and another control edge works in " holding stream " serviceability.This pressure regulator also has at least one LS control edge, can control the LS cross section when pressure regulator 28,30 is opened by this LS control edge and be opened, and can indicate the pipeline 32 indications pressure corresponding with induced pressure to load by this cross section.In described two kinds of control edges each all is to form by the mode in the position control valve 34,36 that is incorporated into pressure regulator 8 and 10 respectively.

This project organization of pressure regulator 8,10 can guarantee in load indication pipeline 32 indication " shunting " serviceability corresponding in the pressure of maximum load pressure and " holding stream " serviceability corresponding to the pressure of minimum load pressure.

Fig. 2 is the schematic representation of the metering orifice 12 of simplification, can provide compression fluid to a plurality of consumers (being 4 consumers shown in Fig. 2) by this metering orifice 12, it can be applied in the loop shown in Figure 1 so in principle.

Metering orifice 12 has a metering orifice pipe box 38 in the valve opening that is inserted into mobile controll block 4.By leading pipeline 16,18,48,50 be connected to operational terminal A, the B of mobile controll block 4, four windows 40,42,44,46 of C, D are formed on the metering orifice pipe box 38.Four consumers are connected to described operational terminal A, B, C, D.In the embodiment shown in fig. 1, metering orifice 12 includes only two windows 46,42 that are connected to two working lines 16,18, therefore can provide compression fluid to two consumers.

In metering orifice pipe box 38, can guide the metering orifice piston 52 that is pushed up the home position by aligning spring assembly 54 to move in the axial direction.In embodiment illustrated in fig. 2, aligning spring assembly 54 is formed by two springs, and these two springs work on two end faces of piston, and are supported on the surface of metering orifice pipe box 38.

In this original position, 52 sealings of the tested head piece piston of window 40-46, thus between the preceding input terminal of metering orifice 12 and leading pipeline 16,18,48,50, there be not being connected by window 40-46 realization.The preceding terminal P of metering orifice 12 is connected with supply pipeline 14.Therefore, the leading pressure in the supplying duct 14 is applied to the end face 56 of the metering orifice piston 52 that is positioned at the bottom shown in Figure 2.The end face 58 of the metering orifice piston 52 that is positioned at the top shown in Fig. 2 limits a control chamber 60, and this control chamber 60 is connected with the preceding terminal P of metering orifice pipe box 38 (being positioned at the bottom in Fig. 2) via the control channel 62 of passing pressure regulator piston 52 and ozzle 64.

Referring to Fig. 2, metering orifice piston 52 also comprises a circular groove 66, and this circular groove 66 limits an annular cavity 68 with the inner circumferential surface of metering orifice pipe box 38.In the zone of annular cavity 68, in metering orifice piston 52, form a transverse holes 70, make between the various piece of annular cavity 68 and can realize pressure compensation rapidly.

Control chamber 60 is connected with aforementioned leading pipeline 16,18,48,50 by branch's pilot line 71.The place ahead in branch, the formation ratio is regulated pilot valve 20 in pilot line 71, and this pilot valve 20 constitutes the branch hydraulic circuit with ozzle 64.Leading pressure in the control chamber 60 is corresponding to the pressure between pilot valve 20 and the ozzle 64.Also can provide the stepping that pilot valve is opened to regulate, thereby the replacement ratio is regulated.

Above-mentioned pilot valve 20 is headed into open position by spring, and can be closed by continuous or step-by-step movement by liquid stream is provided to ratio magnet, thereby make the changing of control fry dried food ingredients that flows to leading pipeline 16,18,48,50 by terminal P by regulating pilot valve 20, and, correspondingly, control chamber 60 in effective pressure also can change.In order to prevent that control oil from freely being flowed out by control chamber 60, also is provided with extra hole 72,74,76,78 on each branch line.Like this, in this kind loop, all be sent back in the compression fluid, so can not produce loss owing to the outflow of control oil owing to control oil at every turn.

Form flow-dividing control edge 80 by end face 56, can control edge 80 control window 40,42,44,46 when the pressure of terminal P rises by this and be opened.When " holding stream " serviceability, the open cross-sections of window 40,42,44,46 is that the control edge 82 that the annular end face by circular groove 66 forms is defined.

When " shunting " serviceability, the pressure at pressure terminal P place acts on the lower end surface 56 on open direction, and pressure works on closing direction in elastic force of the upper springs of aligning spring 54 (being equivalent to about 2-3 crust) and the control chamber 60.The latter can change by regulating pilot valve 20.If the pressure at pressure terminal P place surpasses the pressure sum of the aligning spring of controlling the pressure in the chamber and acting on closing direction, 52 in metering orifice piston shifts out and is moved to the control position by its home position, in this control position,, partly opened by window 40,42,44,46 thereby being controlled at least.The open cross-sections of window is to be determined by pilot valve 20, can regulate the pressure that on closing direction, works in the control chamber 60 by this pilot valve, promptly, by regulating this pilot valve 20, the open cross-sections of window 40,42,44,46 can change, therefore, the pressure at pressure terminal P place also can change.

The compression fluid volume flow that flows to metering orifice 12 via pressure terminal P was opened by window and is become shunting in 40,42,44,46 minutes subsequently, and these shuntings are imported into the terminal that is connected via road in the dummy pipe 16,18,48,50 then.In the embodiment shown in fig. 1, only to be separated into via the metering orifice 12 that only comprises two windows 42,46 be two bursts of shuntings towards oil hydraulic motor 1,2 to the compression fluid volume flow.

In the schematic representation of Fig. 2, do not consider free path selection device 22.Hereinafter will metering orifice be described in further detail in conjunction with Fig. 3 and Fig. 4.Fig. 3 and Fig. 4 have showed the concrete structure of the metering orifice 12 in the loop shown in Figure 1.

Figure 3 shows that the sectional view of mobile controll block 4, this moves and is plugged with metering orifice 12 and pilot valve 20 in the controll block 4.According to Fig. 3, two axles 84,86 of pilot valve 20 and metering orifice 12 are orthogonal in same plane.Metering orifice sleeve pipe 38 is inserted in the valve opening 88 of mobile controll block 4 and can moving axially, and metering orifice sleeve pipe 38 also comprises a radial protrusion 90 simultaneously, and the annular end face shown in the left side is leaned on the shoulder 94 of valve opening 88 by spring 92 among its Fig. 3.Spring 92 is by thread plug 96 supportings near valve opening 88 right parts.The spring chamber 112 that holds spring 92 is connected (referring to Fig. 1) with the passage of the control terminal X that leads to mobile controll block 4.As long as be applied with pilot pressure (pump pressure) on the control terminal X, metering orifice sleeve pipe 38 will remain on the position shown in Fig. 3.Suitably reduce or turn-off pump pressure at control terminal X, metering orifice sleeve pipe 38 just can be subjected to being applied to the effect of the feed pressure of antagonism spring 92 elastic force in the pressure chamber 103 and move right, thereby the unrestricted motion that forms on the adjacent rings end face of metering orifice sleeve pipe 38 control edge 116 will be connected to the two passes short circuit of terminal A and B in the mobile controll block 4, thereby the free path selection device is regulated, in this free path selection device, leading pipeline 16,18 is connected by hydraulic pressure between mutually.The flow resistance that free path is selected to produce in the loop is lower than the pressure controller control force, thereby pressure regulator 8,10 can not move to the control position.At this moment uncontrolled amount will take place distributes.

According to Fig. 3, valve opening 88 (in Fig. 3) in the horizontal direction passes mobile controll block 4, wherein metering orifice sleeve pipe 38 does not extend to whole axial lengths of valve opening 88, thereby the left side at the annular end face 98 of metering orifice sleeve pipe provides a pressure chamber 101, and supply pipeline 14 feeds pressure chamber 101 by the supply passage 98 that forms in the mobile controll block 4.

Pilot valve 20 is inserted in the guiding valve opening 100 and the close anti-twisting equipment 102 that is screwed in the guiding valve opening 100 of its front end, and its lower end is stretched into valve opening 88 and entered the elliptical aperture 104 of metering orifice sleeve pipe 38 fully.Anti-twisting equipment 102 is hollow sleeves, thereby the control chamber 60 of metering orifice 12 is connected with the input terminal of pilot valve 20, that is, the endoporus of anti-twisting equipment 102 forms the part of pilot line 71.

The outlet terminal 106 of pilot valve 20 is connected with valve opening 88 via access ramp 108.At the open area of this access ramp 108, annular groove 110 is connected with the window 42,46 that is represented by dotted lines equally via two longitudinal joints that are represented by dotted lines.In fact these longitudinal joints form two ozzles 72,76, and these two ozzles 72,76 will separate with the passage that is connected to operational terminal A, B as the access ramp 108 of pilot line 71 constituent elements.

Fig. 4 is the enlarged diagram of the metering orifice 12 of Fig. 3.In metering orifice sleeve pipe 38, can guide metering orifice piston 52 to produce axial motions, and metering orifice piston 52 headed into its home position as shown in the figure by aligning spring assembly 54, in this home position, two windows 46,42 are closed at control edge 80,82.Groove near window 46,42 is not to be formed by circular groove, but is formed by the plat part of metering orifice pipe box 38 peripheries.Select the surface of this plat part to make the folding corner region of rectangular window 42,44 be uncovered.

In the embodiment shown in fig. 4, aligning spring assembly 54 is made of a single aligning spring 118, and an end of this spring withstands on via the latch plate 122 that acts on axial projection 120 near on the thread plug 124 of valve opening 88 right parts (Fig. 4).The other end of aligning spring 118 acts on via cup-shaped latch plate 126 radially on the shoulder 128, and this shoulder 128 returns to axial projection 120 with the periphery of metering orifice piston 52.Axial projection 120 radially extend the groove 140 that end 138 enters thread plug 124 fully, thereby make the axial entire length of metering orifice 12 keep very compact.

In the shroud 130 of latch plate 126, form shroud hole 132, thereby the chamber by cup-shaped latch plate 126 sealings is connected with the control chamber 60 that forms spring chamber, compression fluid can not be added like this in this chamber by latch plate 126 sealings.

As shown in Figure 4, elliptical aperture 104 leads to control chamber 60 by impenetrating mouth 134, thereby the hole by this impenetrating mouth 134 and anti-twisting equipment 102 produces and being connected of the input terminal of pilot valve 20.

As shown in Figure 4, latch plate comprises the annular shoulder 136 that is positioned at its periphery, latch plate is by this shoulder 136 and near the radially shoulder of corresponding flow measurement oral pore, thereby makes metering orifice piston 52 be headed into the home position shown in its figure by the elastic force of two latch plates 122 and 126.

Metering orifice piston 52 comprises piston hole 140 in the middle, and this piston hole 140 leads to the chamber of latch plate 126 sealings via an ozzle hole in the zone of axial projection 120.As shown in Figure 2, described ozzle hole formation ozzle 64.

An axial distance at piston hole 140, in the end face 56 of metering orifice piston 52, form a plurality of axial bores 142 on the reference circle that are positioned at, each axial bore feeds annular cavity 68, thereby the lateral terminal P landlord of place pilot power also is applied to annular cavity 68 before making.And axial bore 142 also is connected to annular cavity 68 via transverse holes 144, thereby guarantees rapid pressure compensation, makes the leading pressure in the annular cavity 68 also be applied to the input end of ozzle 64.

In the embodiment shown in fig. 4, the cross section of two windows 46,42 is identical, and the compression fluid volume flow is by the shunting of 50:50 like this.Basically, can be adjusted to other shunting ratio by the cross section that changes window.

Under the situation of shunting, pump terminal P applies higher relatively pressure (pump pressure) in the front side of metering orifice 12, thereby make metering orifice piston 52 owing to the active force of spring 118 moves to the open position with the pilot pressure of controlling pilot valve 20 adjustings in the chamber 60, wherein, 80 controls, two windows 46,42 in control edge are opened.

In most of the cases,, can allow relatively large error like this, and under the situation that stroke drives, allow wittingly to slide comprising that holding of public metering orifice and independent pressure regulator flowed device and shunt is regulated.When desire is reduced to slip hour, that is, and in the time of need giving consumer with compression fluid volume flow mean allocation, at closing direction adjusted pilot valve 20.As described at first, in metering orifice piston 52, this pilot valve 20 and ozzle 64 be jointly as voltage divider, thereby be closed and will control fluid stream and join in the pilot line 71 by control pilot valve 20, therefore, and the increase of the pressure in ozzle 64 downstreams.

If the power that the first operational terminal P produces equals the power of spring 118 and controls the power sum that leading pressure produces in the chamber 60, then metering orifice piston 52 confining force balances.Therefore the difference of the pressure between leading pressure among the first operational terminal P and the control chamber 60 equals the pressure equivalent of spring 118.If the position of spring force and metering orifice piston 52, pressure difference are irrelevant, the amount that the control oil of ozzle 64 falls and flow through in the pressure that then runs through ozzle equates all the time.Under the situation of control wet goods amount, owing to exist pilot valve 20 to make the liquid flow section of pilot valve 20 and pressure fall this fact that changes, the leading pressure in the control chamber 60 can change.If the liquid flow section reduces, just must boost pressure fall, because the pressure in pilot valve 20 downstreams is fixing by pressure regulator 8,10, so the essential increase of the pressure of the upstream of pilot valve 20.The equilibrium of forces at metering orifice piston 52 places is broken, and metering orifice piston 52 moves to closing direction, and at the first operational terminal P place compression fluid is held stream, up to because the pressure equivalent of spring 118 makes pressure be higher than leading pressure in the control chamber 60 once more.

But spring force is also non-constant along the path of metering orifice piston 52.If move to closing direction owing to reducing of pilot valve 20 liquid flow sections, thereby spring 118 will reduce by a little loose spring force that makes.For the equilibrium of forces at metering orifice piston 52 places, big difference like this no longer has been essential between the leading pressure at the first operational terminal P and control chamber 60 places.Pressure by ozzle 64 falls and reduces, therefore controls oily flow and also reduce.This minimizing of controlling oily flow is partly offset flow cross section ground, pilot valve 20 ground and is reduced, because less control oil flow also will produce lower pressure drop above pilot valve 20.In order in the control chamber 60 of the downstream force that is higher than pilot valve 20 with predetermined difference, to build up pressure, to compare with the situation of the oily flow of constant control, this closed degree is big slightly.

The pressure that ozzle 64 downstreams are increased is applied to control chamber 60 and acts on the closing direction of metering orifice piston, thereby makes the metering orifice cross section be subjected to suitable control and be closed.As described in beginning as this specification, that the closing of metering orifice cross section causes the compression fluid volume flow and hold, thereby the leading pressure that metering orifice input end (pump terminal P) is located increases, the pressure loss on the metering orifice is increased, thereby the relative error that the bias pressure that makes the pressure regulator spring causes is less than the pressure difference on the metering orifice, thereby the uniform compression fluid shunting that guarantees.

Correspondingly, can the effective pressure in the control chamber 60 be changed by regulating pilot valve 20, thereby the cross section of opening is produced suitable influence.In the embodiment shown in fig. 1, depend on that liquid stream regulates pilot valve 20.

When regulating the relatively large liquid flow section of window 46,42 (control chamber 60 mesolows), the amount deviation of the amount deviation between actual shunting and the expection shunting during greater than the less liquid flow section of adjusting.For example in stroke drove, the utilization that can have a mind to was regulated slip (slip) with respect to the amount deviation of expected value.When reducing the metering orifice cross section, in fact hydraulic locking can take place, because oil hydraulic motor 1,2 in fact all is provided predetermined expectation compression fluid amount.In other words, when regulating relatively large metering orifice cross section, the compression fluid volume flow is not the ratio shunting (locking-up effect) with 50:50, but for example shunts with the ratio of 45:55, thereby allows wittingly to slide.

Can find out obviously that by Fig. 1 flowing through via the pressure flow volume of total metering orifice 12 adjustings flow to the pressure regulator 8,10 that is distributed by supply pipeline 16,18.These pressure regulators shown in the home position in open, and on closing direction, the pressure that discharge in metering orifice 12 downstreams is applied to these pressure regulators, and is opening on the direction, applies the highest volt at pressure to it. Position control valve 34,36 shown in Fig. 1 is combined as a whole as internal piston and pressure regulator piston in the pressure regulator piston of two pressure regulators 8,10.As shown in the figure, this internal piston and pressure regulator mechanical connection.On the end face of internal piston in pump function left side in Fig. 1, and the leading pressure in the compression fluid passage between metering orifice 12 and the corresponding pressure regulator 8,10 acts on respectively on the right side of internal piston.During " shunting ", internal piston (directional control valve 34,36) be moved to be fixed on shell on block (right side among Fig. 1) lean on mutually, and during " holding stream ", the block shown in the left side is adjacent among internal piston and Fig. 1.

In the home position of opening of pressure regulator 8,10, to the pressure regulator 8 of LS pipeline 32 indication maximum load pressure or 10 with metering orifice 12 between pressure, and so be applied to all pressure regulators 8,10.When making pressure regulator move to the control position by open position, the internal piston of position control valve 34,36 moves to one of illustrated locked position by mechanical coupling, thereby metering orifice 12 can not be discharged to the leading pressure in the compression fluid passage of the pressure regulator 8,10 of correspondence again.Leading pressure in the load indication pipeline 32 also is applied on the end face of internal piston of position control valve 34,36 on right side among Fig. 1.

The pressure regulator piston of pressure regulator 8,10 is subjected to the leading pressure in the load indication pipeline 32 on the one hand, be subjected to the pressure of discharging between metering orifice 12 and the corresponding pressure regulator 8,10 on the other hand, wherein, the compression fluid volume flow is restricted when the force balance of pressure regulator 8,10, thereby pressure on the metering orifice 12 is fallen be independent of load and keep constant.

In " holding stream " serviceability, the leading pressure at the terminal A of metering orifice 12, B place is higher than the leading pressure of terminal P front side.Be controlled the effect of corresponding elevated pressures leading in the chamber 60, metering orifice piston 52 is moved to the leftward position shown in Fig. 4, thereby make control windows 46,42 in control edge 82 overcome the elastic force of aligning spring assembly 54 and open, and partial volume stream is held stream at terminal P place.

During " holding stream ", control fluid stream is as the hole 72,74,76,78 of by-pass flow via correspondence, pilot valve 20, pilot line 71, control chamber 60, ozzle 64 and control channel 62 and flow to pump terminal P from terminal A, the B of consumer.Similar with " shunting " serviceability, pilot valve 20 can be conditioned on closing direction, so that the compression fluid volume flow is evenly distributed, thereby before pilot valve 20 stream is held in this by-pass flow, and suitably reduces this by-pass flow by pilot valve and ozzle 64.Therefore pressure falls also and reduces, thereby the pressure of control in the chamber 60 descends and correspondingly metering orifice piston 52 and the situation of the pilot valve of opening 20 degree of Comparatively speaking closing is bigger, promptly, metering orifice piston 52 moves right to closing direction according to shown in Figure 4, and according to the closing direction of upwards shifting to shown in Figure 2, thereby make the compression fluid volume flow on the direction of pump, be held stream, thereby its distribution is more even.

During holding stream, the internal piston of both direction control valve 34,36 is moved to left block (Fig. 1) and leans on mutually, correspondingly, and to load indication pipeline 32 indication minimum load pressure.About more detailed explanation on the 26S Proteasome Structure and Function of two pressure regulators 8,10 and position control valve 34,36, please refer to the patent application case early that this specification starts the applicant who mentions.

In the embodiment shown in fig. 1, metering orifice 12 comprises two windows that are used for supplying consumer 1,2, in the embodiment shown in Figure 2 can be by 4 consumers of 4 window supplies, can provide more consumer by the quantity that changes window, thereby make system in fact on pressure regulator, can expand to any number.Metering orifice 12 can also be designed to not contain free path and select the loop.

In the aforementioned embodiment, illustrated pressure regulator 8,10 in shunt/the hold stream device has been distributed to each consumer, and a shared discharge orifice that holds has been distributed to a plurality of consumers.Under this situation of holding discharge orifice, on a metering orifice piston, provide a plurality of flow measurements hole.

Hereinafter will be elaborated to an embodiment, so-called in this embodiment shunt is designed to have hole alone, wherein only a metering orifice is distributed to each metering orifice piston.That is to say that this piston is only controlled a metering orifice cross section and is opened, thereby be the single metering orifice of each consumer distribution.For example, this loop can be used to stroke and drive, thereby each independent wheel can both be controlled individually.

The fundamental circuit figure that comprises the control gear that holds discharge orifice for this kind shown in Figure 5.Control structure has 4 second operational terminal A, B, C, D, and each second operational terminal all distributes metering orifice device 12a, 12b, 12c, 12d and pilot valve 20a, 20b, 20c, 20d respectively.In the compression fluid passage between the outlet terminal of metering orifice device 12a, 12b, 12c, 12d and corresponding consumer terminal A, B, C, the D, provide with the identical independently pressure regulator of previous embodiment and Fig. 5 in unshowned pressure suction valve, the structure of metering orifice device 12a, 12b, 12c, 12d is substantially corresponding to the structure described in Fig. 4,5, difference is not form on the metering orifice piston 52 window of a plurality of formation metering orifices, but these windows 42,46 all are connected with the terminal A that is distributed, B, C or D hydraulic pressure.This be because, for example, in fact the circular groove that communicates with these windows is to form in the chunk that holds metering orifice device 12.Perhaps, can use the peripheral annular groove to replace plat part 42,46 in embodiment illustrated in fig. 4.As described above described in the embodiment, during shunting, compression fluid is flow to the corresponding operational terminal P that is positioned at pump side by variable displacement pump 6 (referring to Fig. 1), and each pressure regulator via window 42,46 and corresponding distribution flows to corresponding operational terminal A, B, C, D, and flows to the consumer of distribution thus.

In addition, with previous embodiment forms contrast be, metering orifice device 12a, 12b, 12c, 12d do not design thread plug 124 in Fig. 5, and for simplicity, metering orifice device 12a shown in Fig. 5,12b, 12c, 12d have the metering orifice sleeve pipe 38 that front end is closed, wherein, connect the impenetrating mouth 134 of the pilot valve 20a that controls chamber 60 and distributed corresponding to the shroud impenetrating mouth 134 among Fig. 4.

Metering orifice device among Fig. 5 and another difference of previous embodiment are; in fact the anti-protective gear of turning round that does not need metering orifice piston 52; because all windows 42,46 are all by hydraulic pressure connection mutually, so metering orifice piston 52 need not be observed a certain predetermined rotary angle position.

Fig. 6 is the partial sectional view of mobile controll block 4, and the hydraulic element of distributing to each consumer are contained in this chunk.Mobile controll block 4 has a pump side pressure terminal P and an operational terminal A who is connected to consumer by connecting plate.

Oil groove terminal T is not shown in Fig. 6.Control terminal S and X-shaped form on mobile controll block 4.The pilot valve 20a of metering orifice device 12a, distribution, independently pressure regulator 8 and force feed valve 28 are inserted in the mobile controll block 4.The structure of metering orifice device 12a corresponds essentially to the structure shown in Fig. 3 and Fig. 4.Metering orifice device 12a shown in Fig. 6 is axially fixed on the valve opening of mobile controll block 4 by thread plug 96.Metering orifice sleeve pipe 38 can axially move in valve opening and be headed into the home position shown in the figure by spring, and the leading pilot pressure at operational terminal S place is applied in and opens on the direction, and the leading pressure of locating of control terminal X is applied on the closing direction.In the foregoing embodiments, the pilot pressure at the control terminal X place by reducing mobile controll block 38, all metering orifice device 12a, 12b, 12c, 12d can both be moved, thereby are connected to each other with operational terminal A, B, C, D and the free path selection device is regulated.

Single pressure regulator 8 is opened in its home position, and its structure is corresponding with disclosed structure among the number of patent application DE102004001253.As described in beginning, this pressure regulator comprises two control edges, and one of them works when holding stream, and another works when shunting.In the pressure regulator piston 146 of single pressure regulator 8, shift valve 34 (position control valve) shown in Figure 1 comprise one in pressure regulator piston 146 by the internal piston of sliding guidance.The leading pressure at operational terminal P place upwards is applied to pressure regulator piston 146.Be applied in the pressure of pressure regulator piston 146 opposite side effects via position control valve 34.But other patent application cases that more detailed content REFERENCE TO RELATED people is previous.

Force feed valve 28 has conventional structure, so this paper there is no need to do more explanation again.

In aforementioned metering orifice device 12, stop up in order to regulate freely, can make it to prevent that metering orifice sleeve pipe 38 from moving axially this simple mode free runner is stopped up by thread plug 96 is designed.For this reason, in the embodiment of Fig. 6, the threaded annular end face 148 of thread plug 96 must extend near the annular end face that is resisted against metering orifice sleeve pipe 38.In the embodiment shown in fig. 3, inner circular bead 150 suitably should be extended in the axial direction.

In the described embodiment of beginning, the metering orifice piston be subjected to being inserted in radial direction anti-kink structure protection and be unlikely to reverse, and with pilot valve 20 coaxial settings.Owing to do not need among Fig. 5 and the embodiment shown in Figure 6 that this kind is anti-turns round protection; therefore there is no need therefore the 12 staggered 90 ° of insertions of the metering orifice device in pilot valve 20 and the force feed valve 28 can be inserted parallel to an axis in the mobile controll block of metering orifice device 12 with pilot valve 20 and pilot valve 20a.

Owing to distribute a metering orifice device respectively among the aforesaid embodiment each consumer, therefore can omit hole (ozzle) 72,74,76,78.

If provide the different compression fluids of measuring to consumer, then the window of the metering orifice sleeve pipe 38 of metering orifice device 12a, 12b, 12c, 12d can be selected different clear span according to the compression fluid volume flowrate.Certainly, single window 40,42,44,46 can also be designed to have different cross sections in the head piece described the holding of this specification beginning.

The present invention has disclosed a kind of variable metering orifice device that is used for shunt and holds the stream device, and this metering orifice device comprises one or more operational terminals, can provide compression fluid to consumer by these operational terminals.This metering orifice device comprises a metering orifice piston, can apply pilot pressure to this piston, and described pilot pressure is discharged between two throttle valve of voltage divider, and wherein at least one throttle valve is variable.

Claims (50)

1, a kind of metering orifice device that is used for hydraulic divider and holds the stream device, it comprises a metering orifice piston (52), this metering orifice piston (52) is controlled the one or more variable metering orifice (40,42,44,46) that flows to location parallel to each other at each, in the described metering orifice each all is positioned between second operational terminal (A, B, C, D) that shared first operational terminal (P) and is positioned at the consumer side, and is applying leading pressure in described first terminal (P) to it on the first direction; Comprise a can regulate that is positioned between described first terminal (P) and the described operational terminal (A, B, C, D) and divide hydraulic circuit, described can regulate divides hydraulic circuit to comprise at least two throttle valve

So that produce leading pressure in described first terminal (P) and the pilot pressure between the leading pressure in the described operational terminal (A, B, C, D), this pilot pressure can be applied to described metering orifice piston (52) on the second direction opposite with described first direction; And comprise an aligning spring assembly (54), can make described metering orifice piston (52) be centered at the central position by this aligning spring assembly (54), be closed at the described metering orifice of this center position (40,42,44,46), it is characterized in that at least one the flow cross section in two throttle valve of described minute hydraulic circuit is variable.

2, metering orifice device according to claim 1, wherein said variable throttle valve are continuous or adjustable pilot valves (20) of step-by-step movement.

3, metering orifice device according to claim 2, a fixed restrictive valve of wherein said minute hydraulic circuit are placed in the control oil passage between described first terminal (P) and the described pilot valve (20).

4, according to each described metering orifice device in the claim 1,2,3, wherein said metering orifice piston (52) is directed in an effluent muzzle pipe (38), each window that distributes (40,42,44,46) in this metering orifice sleeve pipe (38) in the promising described operational terminal of configuration (A, B, C, D), and each window forms a metering orifice, and can control opening of described window by described metering orifice piston (52).

5, metering orifice device according to claim 4, wherein said window (40,42,44,46) has different cross sections.

6, according to each described metering orifice device in the claim 1,2,3,5, wherein said metering orifice piston (52) comprises two control edges (80,82), one is the flow-dividing control edge (80) that works during shunting, another holds current control edge (82) for what work during holding stream.

7, metering orifice device according to claim 4, wherein said metering orifice piston (52) comprises two control edges (80,82), one is the flow-dividing control edge (80) that works during shunting, another holds current control edge (82) for what work during holding stream.

8, metering orifice device according to claim 6, the wherein said current control edge (82) that holds is that a circular groove (66) by described metering orifice piston (52) forms.

9, metering orifice device according to claim 7, the wherein said current control edge (82) that holds is that a circular groove (66) by described metering orifice piston (52) forms.

10, according to Claim 8 or 9 described metering orifice devices, the front side of wherein said metering orifice piston (52) forms a plurality of axial bores (142) that are communicated to described circular groove (66).

11, according to each described metering orifice device in the claim 3,5,7,8,9, one of them is mounted with described nozzle (64) and is communicated to the control channel (140) of controlling chamber (60) and runs through described metering orifice piston (52).

12, metering orifice device according to claim 4, one of them is mounted with described nozzle (64) and is communicated to the control channel (140) of controlling chamber (60) and runs through described metering orifice piston (52).

13, metering orifice device according to claim 6, one of them is mounted with described nozzle (64) and is communicated to the control channel (140) of controlling chamber (60) and runs through described metering orifice piston (52).

14, metering orifice device according to claim 10, one of them is mounted with described nozzle (64) and is communicated to the control channel (140) of controlling chamber (60) and runs through described metering orifice piston (52).

15, according to each described metering orifice device in the claim 2,12,13,14, wherein said control chamber (60) can be connected to the leading pipeline (16,18) that is connected with operational terminal (A, B, C, D) via a pilot line (71) and described pilot valve (20).

16, metering orifice device according to claim 11, wherein said control chamber (60) can be connected to the leading pipeline (16,18) that is connected with operational terminal (A, B, C, D) via a pilot line (71) and described pilot valve (20).

17, metering orifice device according to claim 15, wherein said pilot valve (20) can be by in proportion or step-wise adjustment.

18, metering orifice device according to claim 16, wherein said pilot valve (20) can be by in proportion or step-wise adjustment.

19, metering orifice device according to claim 15, wherein said keyholed back plate road (71) are branched off into each leading pipeline (16,18), and a hole (72,74,76,78) is placed in each branch line.

20, according to each described metering orifice device in the claim 16,17,18, wherein said keyholed back plate road (71) is branched off into each leading pipeline (16,18), and a hole (72,74,76,78) is placed in each branch line.

21, according to each described metering orifice device in the claim 1,2,3,5,7,8,9,12,13,14,16,17,18,19, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

22, metering orifice device according to claim 4, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

23, metering orifice device according to claim 6, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

24, metering orifice device according to claim 10, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

25, metering orifice device according to claim 11, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

26, metering orifice device according to claim 15, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

27, metering orifice device according to claim 20, wherein said aligning spring assembly (54) acts on the shoulder of described metering orifice piston (52) via cup-shaped latch plate (126), wherein said latch plate (126) comprises a shroud (136), this shroud (136) forms the reception chamber of the end of aligning spring (118), and this aligning spring (118) is connected to described control chamber by at least one shroud hole (132).

28, metering orifice device according to claim 4, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

29, according to claim 5,7,8,9,12,13,14,16,17,18,19,22,23,24,25,26,27 each described metering orifice devices, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

30, metering orifice device according to claim 6, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

31, metering orifice device according to claim 10, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

32, metering orifice device according to claim 11, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

33, metering orifice device according to claim 15, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

34, metering orifice device according to claim 20, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

35, metering orifice device according to claim 21, wherein said metering orifice sleeve pipe (38) slides and inserts a valve opening (88) of mobile controll block (4) and be biased into the home position, wherein at least one is connected to described operational terminal (A, B, C, D) discharge passage leads to described valve opening (88), this discharge passage in described home position by comprising at least one window (40,42,44, an end of described metering orifice sleeve pipe (38) 46) covers, an end face of described metering orifice sleeve pipe limits a spring chamber (112), can be to this spring chamber (112) thus applying pilot pressure is biased into the home position with described metering orifice sleeve pipe (38) when applying pilot pressure, and when reducing described pilot pressure, make described metering orifice sleeve pipe (38) move to the free path chosen position from described home position, at this free path chosen position place, be opened by the described preceding pathway of the end control of described metering orifice sleeve pipe (38), therefore it linked mutually.

36, according to each described metering orifice device in the claim 28,30,31,32,33,34,35, wherein by screwing in the axial stroke of thread plug (96) the described metering orifice sleeve pipe of blocking-up (38).

37, metering orifice device according to claim 29 is wherein by screwing in the axial stroke of thread plug (96) the described metering orifice sleeve pipe of blocking-up (38).

38, according to each described metering orifice device in the claim 1,2,3,5,7,8,9,12,13,14,16,17,18,19,22,23,24,25,26,27,28,30,31,32,33,34,35,37, wherein pilot valve axis (84) and metering orifice axis meet at right angles and extend and intersect with it.

39, metering orifice device according to claim 4, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

40, metering orifice device according to claim 6, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

41, metering orifice device according to claim 10, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

42, metering orifice device according to claim 11, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

43, metering orifice device according to claim 15, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

44, metering orifice device according to claim 20, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

45, metering orifice device according to claim 21, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

46, metering orifice device according to claim 29, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

47, metering orifice device according to claim 36, wherein pilot valve axis (84) and metering orifice axis (86) meet at right angles and extend and intersect with it.

48, according to the described metering orifice device of claim 38, wherein said metering orifice sleeve pipe (38) comprises an elliptical aperture (104) in its periphery, is absorbed in an anti-twisting equipment (102) with respect to the coaxial arrangement of pilot valve (20) in this ellipse sky (104).

49, according to each described metering orifice device in the claim 39,40,41,42,43,44,45,46,47, wherein said metering orifice sleeve pipe (38) comprises an elliptical aperture (104) in its periphery, is absorbed in an anti-twisting equipment (102) with respect to the coaxial arrangement of pilot valve (20) in this ellipse sky (104).

50, a kind ofly shunt and hold the stream device, it comprises at least two consumers (1,2), and described consumer (1,2) can be connected so that in one direction flow of pressurized fluid is shunted and in the opposite direction stream is held in shunting; Comprise the pressure regulator (8,10) of distributing to each consumer (1,2); And comprise a metering orifice device that has in the aforementioned claim at least one feature, wherein metering orifice (40,42,44,46) is distributed to a plurality of consumers or a consumer simultaneously.

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