CN102297172A - Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve - Google Patents

Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve Download PDF

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Publication number
CN102297172A
CN102297172A CN 201110216890 CN201110216890A CN102297172A CN 102297172 A CN102297172 A CN 102297172A CN 201110216890 CN201110216890 CN 201110216890 CN 201110216890 A CN201110216890 A CN 201110216890A CN 102297172 A CN102297172 A CN 102297172A
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CN
China
Prior art keywords
spool
valve
control valve
hydraulicdirectional control
valve pocket
Prior art date
Application number
CN 201110216890
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Chinese (zh)
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CN102297172B (en
Inventor
易小刚
刘永东
Original Assignee
三一重工股份有限公司
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Priority to CN201010240847.9 priority Critical
Priority to CN2010102408479A priority patent/CN101893011A/en
Application filed by 三一重工股份有限公司 filed Critical 三一重工股份有限公司
Priority to CN201110216890A priority patent/CN102297172B/en
Publication of CN102297172A publication Critical patent/CN102297172A/en
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Publication of CN102297172B publication Critical patent/CN102297172B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401Valve members; Fluid interconnections therefor
    • F15B13/0402Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves

Abstract

The invention relates to a hydraulic directional control valve, a hydraulic directional control valve box and a control method of the hydraulic directional control valve. The hydraulic directional control valve comprises a valve body, valve core and a valve bushing, wherein the valve core is arranged in the cavity of the valve body, and the valve bushing is sleeved on the valve core; the valve bushing is a split type valve bushing, and comprises a first valve bushing and a second valve bushing; the valve core is split type valve core, and comprises a first valve core and a second valve core; and the hydraulic directional control valve box comprises the first valve bushing with a split type structure, the second valve bushing and the first valve core, and the second valve core; the valve core and the valve bushing are integrated to a valve block. In the hydraulic directional control valve provided by the invention, the split type valve core and the split type valve bushing structure are adopted, the problems that the fitting surface of the valve core and the valve port of the valve body in the hydraulic directional control valve is long, the precision is hard to guarantee, the process and the assembly are not convenient, and the valve port cannot be repaired once abraded are solved; due to the arrangement of the split type valve bushing and the split type valve core, the valve core is simple to assemble, and the valve core is not easy to block, contamination resistance is strong, the interchangeability of parts is good, the maintenance and the replacement are convenient to carry out, and the whole service life of the hydraulic directional control valve is greatly prolonged.

Description

Hydraulicdirectional control valve, hydraulicdirectional control valve group and hydraulicdirectional control valve controlling method

Technical field

The present invention relates to hydraulic transmission and control technique field, relate in particular to hydraulicdirectional control valve, the hydraulicdirectional control valve group of liquid flow path direction in a kind of controlled hydraulic system or flow quantity, the invention still further relates to the controlling method of this hydraulicdirectional control valve.

Background technique

The hydraulicdirectional control valve application that is used for flow direction control or flow control in the hydraulic system is very extensive, and its kind is also a lot.By the maneuverability pattern branch have electronic, surge, electricity surges etc., by the structure of valve various ways such as guiding valve, rotary valve is arranged again.

Figure 1 shows that a kind of existing sliding valve style hydraulicdirectional control valve structure.As shown in Figure 1, this hydraulicdirectional control valve comprises first end cap 1 ', first Returnning spring 2 ', integral core 3 ', valve body 4 ', second Returnning spring 5 ' and second end cap 6 '.Integral core 3 ' is located in the cavity of valve body 4 ', by first Returnning spring 2 ' and second Returnning spring, 5 ' come centerings, remains on meta.

The both sides control oil pressure of this hydraulicdirectional control valve is introduced by X ', Y ' mouthful, as shown in Figure 1a, and when X ' mouthful of oil-feed, oil pressure promotes integral core 3 ' and moves to the right, compress second Returnning spring 5 ' and realization commutation, this moment, P ' mouth communicated with B ' mouthful, and A ' mouth communicates with T ' mouthful; After the pressure release of X ' mouth oil pressure, integral core 3 ' is got back to meta under the effect of second Returnning spring 5 ', and P ' mouth, A ' mouth, B ' mouth, T ' mouth respectively do not communicate.Shown in Fig. 1 b, when Y ' mouthful of oil-feed, oil pressure promotion integral core 3 ' is moved left, compresses first Returnning spring 2 ' and realization commutation, and this moment, P ' mouth communicated with A ' mouthful, and B ' mouth communicates with T ' mouthful; After Y ' mouthful of oil pressure pressure release, spool 3 ' is got back to meta under the effect of first Returnning spring 2 '.

There is following defective in the hydraulicdirectional control valve of prior art.

Because spool 3 ' directly cooperatively interacts with valve body 4 ', need directly to go up the valve opening that processing is used to hold spool 3 ' at valve body 4 ', process very inconveniently, and the valve opening aperture can directly cause scrapping of whole hydraulicdirectional control valve after having processed big.

Simultaneously, because spool 3 ' be integrated type, longer with the fitting surface of valve body 4 ', the endoporus processing length of valve body 4 ' is longer, and machining accuracy is difficult to guarantee, is difficult to guarantee to assemble desired less and uniform gap.The matching gap of spool 3 ' and valve body 4 ' is crossed conference and is caused the amount of leakage between inner lumen pore to increase, and influences the service behaviour of selector valve; Matching gap is too small, makes spool 3 ' hair fastener easily, and it is undesired to cause commutating.And when this hydrovalve was worked as selector valve, integrated type spool 3 ' was subjected to the influence of hydraulic pressure well cuts easily and causes clamping stagnation, makes the selector valve contamination resistance relatively poor.

In addition, there are wearing and tearing in use in the valve opening of valve body 4 ' and spool 3 ', cause the matching gap of valve opening and spool excessive, and whole hydraulicdirectional control valve is difficult to repair, and makes the reusability of selector valve bad.

In view of this, provide a kind of hydraulicdirectional control valve that can overcome the existing defective of above-mentioned prior art to become present technique field institute problem demanding prompt solution.

Summary of the invention

The object of the present invention is to provide a kind of hydraulicdirectional control valve, the spool that can solve in the hydraulicdirectional control valve is difficult to guarantee processing, the inconvenient problem of assembling with cooperate face length, the precision of valve body.

Another object of the present invention is to provide a kind of parts can repair, change, interchangeability is good, the hydraulicdirectional control valve of long service life.

Another purpose of the present invention is to provide a kind of spool to be difficult for hair fastener, the hydraulicdirectional control valve that contamination resistance is strong.

Another purpose of the present invention is to provide a kind of hydraulicdirectional control valve group, and the spool in this hydraulicdirectional control valve group is difficult for hair fastener, and contamination resistance is strong, and assembling, easy to maintenance.

Another purpose of the present invention is to provide a kind of hydraulic control system that can overcome above-mentioned prior art defective.

For achieving the above object, according to an aspect of the present invention, provide a kind of hydraulicdirectional control valve, having comprised: valve body; Valve pocket is located in the cavity of valve body, and described valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket at least; Spool is located in the described valve pocket, and described spool is split type spool, comprises first spool and second spool at least, and described first spool and second spool are in the synchronous working state; Described hydraulicdirectional control valve is provided with at least three logical hydraulic fluid ports, can realize at least two working positions.

Logical hydraulic fluid port among the present invention comprises actuator port, pressure hydraulic fluid port and return opening.

Further, described valve pocket is the cascade valve pocket, and the cavity of described valve body also is set to cascade, is complementary with the stepped construction of described valve pocket.

Further, described valve pocket be provided with described valve body on the corresponding logical hydraulic fluid port of pressure hydraulic fluid port, seal by seal ring between described valve pocket and the valve body.

Further, this hydraulicdirectional control valve also comprises:

First follows spring, and directly the end with described first spool connects; And

Second follows spring, and directly the end with described second spool connects,

Described first follows spring and second follows spring and is used to keep described first spool and second spool to be in the state of leaning.

Further, this hydraulicdirectional control valve also comprises the 3rd spool, and described the 3rd spool is located between described first spool and second spool.

Further, this hydraulicdirectional control valve also comprises the 3rd valve pocket, and described the 3rd valve pocket and described the 3rd spool are complementary.

Further, described hydraulicdirectional control valve is the electromagnetic drive type hydraulicdirectional control valve, and the end of the end of described first spool and second spool is respectively equipped with first electromagnet and second electromagnet, is used to handle the action of described spool.

Further, described hydraulicdirectional control valve is a Flow valve, and described electromagnet is a proportion electro-magnet, is used for the passing ratio current of electromagnet is controlled flow by the Flow valve valve port.

Further, the axis disalignment of the axis of described first spool and second spool.

Further, the external diameter of described first spool and second spool is inequality.

Further, described hydraulicdirectional control valve is the 3-position-3-way hydraulicdirectional control valve, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, and the position that described oil return inlet T is provided with is with respect between described first spool and second spool.

Further, described hydraulicdirectional control valve is the three-position four-way hydraulic selector valve, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, the second actuator port B, reach drain tap R, and the position that described drain tap R is provided with is with respect between described first spool and second spool.

Further, described hydraulicdirectional control valve is three six logical hydraulicdirectional control valves, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, the second actuator port B, the 3rd actuator port C, the 4th actuator port D, reach drain tap R, and the position that described drain tap R is provided with is with respect between described first spool and the 3rd spool and between described second spool and the 3rd spool.

According to another aspect of the present invention, a kind of controlling method of hydraulicdirectional control valve recited above is provided, drain tap R on the described valve body is simultaneously as control port K, and when spool during in meta, position, a left side and right position, the leakage oil between first spool and second spool releases by described K mouth, when described K mouth is introduced pressure oil, first spool is to left movement, and second spool moves right, and the P mouth on the valve body communicates with the A mouth at this moment, the P mouth communicates with the B mouth simultaneously, realizes four bit functions.

According to a further aspect of the invention, provide a kind of hydraulicdirectional control valve group, having comprised: the valve piece; Valve pocket is located in the cavity of described valve piece, and described valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket at least; Spool is located in the described valve pocket, and described spool is split type spool, comprises first spool and second spool at least, and described first spool and second spool are in the synchronous working state; Described hydraulicdirectional control valve is provided with at least three logical hydraulic fluid ports, and described hydraulicdirectional control valve can be realized at least two working positions.

According to a further aspect of the invention, provide a kind of hydraulic control system, described hydraulic control system comprises foregoing hydraulicdirectional control valve or hydraulicdirectional control valve group.

According to a further aspect of the invention, provide a kind of engineering machinery, described engineering machinery is provided with foregoing hydraulicdirectional control valve or hydraulicdirectional control valve group.

According to hydraulicdirectional control valve of the present invention, have following advantage:

1, owing between spool and valve body, adopted split type valve pocket, spool no longer directly cooperates with valve body, cooperate and change into valve pocket, machining high-precision is required to have transferred to valve pocket from valve body, and valve pocket can be processed separately, it is very convenient to process, and precision guarantees easily, greatly reduces the requirement on machining accuracy of valve body.

2, valve pocket and spool adopt split-type structural, have shortened the length of thread engagement of spool and valve pocket, valve body greatly, and valve body inner bore can be processed respectively from both sides, greatly reduces difficulty of processing.Coaxality between the endoporus of valve body both sides requires greatly to reduce, need not to do the coaxality requirement between first valve pocket and second valve pocket, and first spool does not require that with second spool external diameter is consistent, even allowable offset, but so two spool separate machined, adding only needs first spool and the complete processing of first valve pocket man-hour, second spool and the complete processing of second valve pocket, and it is very convenient to process.Thereby guarantee suitable and uniform gap between spool and the valve pocket easily, reduced clamping stagnation hidden danger, contamination resistance is strong, and because spool split, can utilize the manner of execution of spool, eliminate the clamping stagnation of another spool by a spool, the working efficiency of hydraulicdirectional control valve and working stability are greatly improved.

3, split type spool uniform wear in commutation process can improve the spool life-span, and then improves the working life of hydraulicdirectional control valve.Because the setting of split type valve pocket, can change separately after spool excessive wear therein or repair wearing and tearing with compensating spool by changing valve pocket, parts interchangeability and reusability are good, have reduced user cost.

4, prior art hydraulicdirectional control valve valve body can only be used foundry goods machine shaping, and among the present invention, owing to spool, valve pocket adopt split-type structural, easy to process, valve body can be realized by forging.

5, adopt split type spool, valve pocket that the spool entire length is increased, can arrange more hydraulic fluid port, need not particular design and can obtain special meta function.When realizing two-bit triplet, 3-position 4-way, three six-way transfer valve functions, mouthful use by drain tap being done control, can realize four commutation function.

Except purpose described above, feature and advantage, other purpose, feature and advantage that the present invention has will be described in further detail in conjunction with the accompanying drawings.

Description of drawings

Constitute this specification a part, be used for further understanding accompanying drawing of the present invention and show the preferred embodiments of the present invention, and be used for illustrating principle of the present invention with specification.Illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the hydraulicdirectional control valve structural representation of prior art;

Fig. 1 a is the schematic representation that the hydraulicdirectional control valve work of prior art the time is in position, a left side;

Fig. 1 b is the schematic representation that the hydraulicdirectional control valve work of prior art the time is in right position;

Fig. 2 is the structural representation according to the hydraulicdirectional control valve of the first embodiment of the present invention;

Schematic representation when Fig. 2 a is in position, a left side for according to the work of the hydraulicdirectional control valve of the first embodiment of the present invention time;

Schematic representation when Fig. 2 b is in right position for according to the work of the hydraulicdirectional control valve of the first embodiment of the present invention time;

Fig. 2 c is the schematic representation when realizing two-position three way or 3-position-3-way according to hydraulicdirectional control valve of the present invention;

Fig. 3 is a hydraulicdirectional control valve structural representation according to a second embodiment of the present invention;

Fig. 4 is the hydraulicdirectional control valve structural representation of a third embodiment in accordance with the invention;

Fig. 5 is the hydraulicdirectional control valve structural representation of a fourth embodiment in accordance with the invention;

Fig. 5 a is the hydraulicdirectional control valve structural representation of a kind of modification of a fourth embodiment in accordance with the invention;

Fig. 6 is a hydraulicdirectional control valve structural representation according to a fifth embodiment of the invention;

Fig. 6 a is the structural representation when being Flow valve according to hydraulicdirectional control valve of the present invention;

Fig. 6 b is the structural representation when adopting the manual drives formula according to hydraulicdirectional control valve of the present invention;

Fig. 7 is a hydraulicdirectional control valve structural representation according to a sixth embodiment of the invention;

Fig. 8 is a hydraulicdirectional control valve structural representation according to a seventh embodiment of the invention;

Fig. 9 shows according to split type spool in the hydraulicdirectional control valve of the present invention, structure when valve pocket length is inequality;

Figure 10 has increased the schematic representation that a control port realizes four bit function controlling methods for hydraulicdirectional control valve according to the present invention;

Figure 10 a is in the hydraulicdirectional control valve controlling method shown in Figure 10, the schematic representation when two split type spools separate; And

Figure 11 shows according to the structure that constitutes the hydraulicdirectional control valve group in the valve piece that spool, valve pocket are integrated into of the present invention.

Embodiment

Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

Schematic representation when Fig. 2, Fig. 2 a, Fig. 2 b are respectively and are in a when position left side and right position according to the structural representation of the hydraulicdirectional control valve of the first embodiment of the present invention, hydraulicdirectional control valve.

As shown in Figure 2, in the first embodiment of the present invention, hydraulicdirectional control valve comprises valve body 10, spool and valve pocket, valve pocket is located in the cavity of described valve body, valve pocket is split type valve pocket, comprises first valve pocket 21 and second valve pocket 22, and spool is arranged in the valve pocket, spool is split type spool, comprises first spool 31 and second spool 32.

In hydraulicdirectional control valve of the present invention, also include resetting-mechanism, this resetting-mechanism is arranged at the end of spool, is used to drive valve core reset.As shown in Figure 2, resetting-mechanism comprises that first elastic component 51 and second elastic component, 52, the first elastic components 51 are located at the end place of first spool 31, is used for the end of this first spool 31 of roof pressure, second elastic component 52 is located at the place, end of second spool 32, is used for the end of this second spool 32 of roof pressure.

Be appreciated that above-mentioned elastic component can be parts or the mechanism that spring or other can realize allowing spool 30 reset functions.

As shown in Figure 2, hydraulicdirectional control valve of the present invention also is provided with end-cap assembly, comprises first end-cap assembly 71 and second end-cap assembly 72, is arranged at the two ends place of valve body 10 respectively, is used to simultaneously hold and locatees first elastic component 51 and second elastic component 52.

The concrete form of first spool 31 and second spool 32 can come specific design according to needed meta function, and two spools 31,32 are by the meta of making a concerted effort to remain on of first elastic component 51 and second elastic component 52.

Be appreciated that when be provided with when having hydraulic fluid port on the corresponding valve body 10 of valve pocket, also be provided with on the valve pocket with valve body 10 on the corresponding logical hydraulic fluid port of hydraulic fluid port.As shown in Figure 2, between valve pocket and valve body 10, seal ring 40 is set, is used to seal.Preferably, sealing circle 40 adopts the O RunddichtringO.

Shown in Fig. 2 a, when needs are realized hydraulicdirectional control valve left side bit function, introduce pressure oil by the X mouth toward first elastic component, 51 cavitys, promoting first spool 31 moves to the right, first spool 31 passes to second spool 32 by its end face surface of contact with commutation power, promote second spool 32 and move to the right, two spools can arrive the right side of valve body 10 simultaneously, realize that the P mouth is communicated with the T mouth with A mouth, B mouth.

In like manner, shown in Fig. 2 b, introduce pressure oil by the Y mouth toward second elastic component, 52 cavitys, can promote second spool 32 and first spool 31 arrives valve body 10 left sides simultaneously, realize P mouth and B mouth, the A mouth is communicated with the T mouth.

As seen hydraulicdirectional control valve of the present invention can be realized at least two working positions, promptly above-mentioned position, a left side and right position.In actual use, because therefore two spools 31,32 can realize three working positions by the meta of making a concerted effort to remain on of first elastic component 51 and second elastic component 52.

Hydraulicdirectional control valve of the present invention also provides the implementation of two-position three way or 3-position-3-way.Shown in Fig. 2 c, when the spool of hydraulicdirectional control valve was in meta, hydraulic fluid port was not connected; When being in position, a left side, the P mouth communicates with the T mouth; And when being in right position, the A mouth communicates with the T mouth.

In addition, in the embodiment shown in Fig. 2 c, also the return springs of a side can be removed in actual the use, then split type spool can push up under the active force of opposite side spring on one side, so just there has not been meta, become the implementation of another kind of two working positions, also promptly as two position three way directional control valve.

In hydraulicdirectional control valve of the present invention, owing to adopted split type valve pocket, realize sealing by seal ring between valve body and the valve pocket, reduced the machining accuracy of valve body 10 endoporus, simultaneously valve body in the conventional hydraulic selector valve and cooperating of spool have been transferred between valve pocket endoporus and the spool, valve pocket can be processed separately, and it is very convenient to process, and precision guarantees easily.

Because valve pocket is split type, valve body 10 endoporus can be processed respectively from both sides, and the processing length of both sides reduces, and is easy to realize, and the coaxality between the endoporus of valve body 10 both sides requires greatly to reduce, and does not need to do the coaxality requirement between first valve pocket 21 and second valve pocket 22.On the other hand, since among the present invention spool from traditional integrated type become split type after, position degree between first spool 31 and second spool 32 is less demanding, only need first spool 31 and the 21 complete processing of first valve pocket, second spool 32 and the 22 complete processing of second valve pocket, but first spool 31 and second spool, 32 separate machined are easy to process.And it is consistent that first spool 31 and second spool, 32 external diameters do not require, even off-centre also can realize its function.Also promptly, after the present invention had adopted split type valve pocket and valve core structure, the spool manner of execution still can be realized consistent with the conventional hydraulic selector valve, the meta function that can realize in the time of can realizing traditional hydraulicdirectional control valve as selector valve.

After hydraulicdirectional control valve adopts split type valve pocket and spool, first spool 31 and second spool 32 are processed respectively, machining accuracy and assembly precision all guarantee easily, and it is easy to assembly, the spool length of thread engagement shortens, reduce clamping stagnation hidden danger, and can utilize the manner of execution of spool, eliminated the clamping stagnation of another spool with a spool.Two spool uniform wears in commutation process can improve the spool life-span, and then improve the hydraulicdirectional control valve life-span.Can change separately after one of them spool excessive wear or repair wearing and tearing with compensating spool by changing valve pocket, interchangeability is good, and reusability is good, has reduced user cost.

The embodiment of above-mentioned Fig. 2 of the present invention provides a kind of 3-position 4-way to have the hydraulicdirectional control valve of at least three logical hydraulic fluid ports, valve body and valve pocket are provided with corresponding pressure hydraulic fluid port (P), return opening (T), first actuator port (A), second actuator port (B), reach drain tap (R), and the position that this drain tap (R) is provided with is with respect between first spool (31) and second spool (32).

Adopt split type valve pocket and spool that the spool entire length is increased, can arrange more hydraulic fluid port, need not particular design and can obtain special meta function.By drain tap being done control mouthful use, can realize four commutation function (back will describe in detail).

Fig. 3 is the structural representation of hydraulicdirectional control valve according to a second embodiment of the present invention, as shown in the figure, in this embodiment, is provided with first valve pocket 21 and second valve pocket 22 equally between the first split type spool 31 and second spool 32.Institute's difference is that first valve pocket 21 and second valve pocket 22 are designed to cascade, and the cavity of valve body 10 also is set to cascade, is complementary with the stepped construction of first valve pocket 21 and second valve pocket 22.

Adopting above-mentioned cascade valve pocket structure, is that the installation of first valve pocket 21 and second valve pocket 22 provides a great convenience, and the convenient simultaneously sealing means by O RunddichtringO 40 is assembled to the valve body 10 from relative direction, and can avoid scratching O RunddichtringO 40.

In the second embodiment of the present invention, the mode by O RunddichtringO 40 seals, convenient from opposite direction first valve pocket 21 and second valve pocket 22 are taken out from valve body 10 and repeat assemble.

In hydraulicdirectional control valve of the present invention, first spool 31 communicates with drain tap R with the surface of contact of second spool 32, leakage oil between first spool 31 and second spool 32 can be flowed back to fuel tank, prevent to separate because of producing oil pressure between first spool 31 and second spool 32, cause can't synchronous communicating situation, also promptly first spool 31 and second spool 32 are in the synchronous working state.

For further guaranteeing the synchronous communicating action of first spool 31 and second spool 32, also provide the third embodiment of the present invention.As shown in Figure 4, show the hydraulicdirectional control valve structure of a third embodiment in accordance with the invention.In this embodiment, first elastic component 51 is located in first end-cap assembly 71 and is leaned the end of first spool 31 by one first sleeve member 61, and second elastic component 52 is located in second end-cap assembly 72 and is leaned the end of second spool 32 by one second sleeve member 62.In addition, also have first and follow spring 81, be arranged in first sleeve member 61, the first direct end with first spool 31 of an end of following spring 81 connects; Second follows spring 82, is arranged in second sleeve member 62, and this second direct end with second spool 32 of an end of following spring 82 connects.First follows spring 81 and second follows spring 82 and is used to keep first spool 31 and second spool 32 to be in the state of leaning.

In the whole stroke of valve core movement, first follows spring 81 and second follows the faying surface that spring 82 can be followed first spool 31 and second spool 32 respectively always, also promptly remains the contact condition with spool.The meta of spool still by first elastic component 51 and second elastic component 52 make a concerted effort keep.When first spool 31 and second spool 32 all were in valve body 10 leftward position, second spool 32 separated with second elastic component 52.Control oil is after the pressure release of Y mouth, first elastic component 51 will promote first spool 31 and second spool 32 moves to meta, because the transient state power of surging during the spool action can make second spool 32 separate with first spool 31, influence the commutation stability of hydraulicdirectional control valve, and increase first follow the left side that spring 81 can be fitted in first spool 31 always, first spool 31 is produced roof pressure power, and then the applying that keeps first spool 31 and second spool 32.

Similarly, when first spool 31 and second spool 32 all are in valve body 10 right positions, first spool 31 separates with first elastic component 51, control oil is after the pressure release of X mouth, second elastic component 52 will promote second spool 32 and first spool 31 moves to meta, because the transient state power of surging during the spool action can make first spool 31 separate with second spool 32, influence the commutation stability of hydraulicdirectional control valve, and increase second follow the right side that spring 82 can be fitted in second spool 32 always, second spool 32 is produced roof pressure power, and then the applying that keeps second spool 32 and first spool 31.

As shown in Fig. 4 and other figure, first spool 31 and second spool 32 mutually against the part place release hydraulic oil in the spool split place cavity by drain tap R, be in the state of leaning with the end face that keeps first spool 31 and the end face of second spool 32, first spool (31) and second spool (32) be in synchronous working state.

Extremely shown in Figure 4 as Fig. 2, the invention provides a kind of three-position four-way hydraulic selector valve, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, the second actuator port B, reach drain tap R, and the position that described drain tap R is provided with is with respect between described first spool (31) and second spool (32).

Fig. 5 shows the hydraulicdirectional control valve structure of a fourth embodiment in accordance with the invention.As shown in Figure 5, in the fourth embodiment of the present invention, can also comprise that the 3rd spool 33, the three spools 33 are located between first spool 31 and second spool 32.

Fig. 5 a shows the structure according to a kind of modification of the hydraulicdirectional control valve of fourth embodiment of the invention.This hydraulicdirectional control valve comprises that also the 3rd valve pocket 23, the three valve pockets 23 and the 3rd spool 33 are complementary.On the other hand, the embodiment of Fig. 5 a of the present invention provides a kind of three six logical hydraulicdirectional control valves, valve body and valve pocket are provided with corresponding pressure hydraulic fluid port (P), return opening (T), first actuator port (A), second actuator port (B), the 3rd actuator port (C), the 4th actuator port (D) and drain tap (R), and the position that this drain tap (R) is provided with is with respect between first spool (31) and the 3rd spool (33) and between second spool (32) and the 3rd spool (33).

Fig. 6 is a hydraulicdirectional control valve structural representation according to a fifth embodiment of the invention.Different is with each embodiment of front, in the 5th embodiment, hydraulicdirectional control valve is the electromagnetic drive type hydraulicdirectional control valve, and the end of the end of first spool 31 and second spool 32 is respectively equipped with first electromagnet 91 and second electromagnet 92, is used to handle the action of spool.

Shown in Fig. 6 a, hydraulicdirectional control valve of the present invention can also use as Flow valve, this moment, the both sides electromagnet adopted proportion electro-magnet 93,94, when the spool of hydraulicdirectional control valve drives with proportion electro-magnet, the electromagnetic force size passing ratio current of electromagnet of proportion electro-magnet is regulated, by to passing ratio electromagnet 93,94 Current Control, obtain suitable electromagnetic force, and the displacement amount of the size of electromagnetic force decision spool, thereby obtain spool 31, the accurate control of 32 displacements, and the aperture of the valve port that constitutes between the cavity of the displacement of spool decision spool and valve body, and then can control flow by hydraulic fluid port, play the effect of flow control valve.

Shown in Fig. 6 b, hydraulicdirectional control valve of the present invention can also be a manual drives formula hydraulicdirectional control valve, and 95,96 is the manual drives handle among the figure.

As shown in Figure 7, be the structure of according to a sixth embodiment of the invention hydraulicdirectional control valve.In this embodiment, the axis disalignment of the axis of first spool 31 and second spool 32, the deviation distance of two axial lines shown in the figure is L1.Preferably, on first spool 31 and second spool 32, be respectively arranged with step surface 311 and step surface 321, the external diameter of the step surface 311 of first spool 31 is less than the external diameter of second spool 32, the external diameter of the step surface 321 of second spool 32 is less than the external diameter of first spool 31, makes between each step surface and the corresponding spool bore and can not produce interference.Thereby under first spool 31 and state that the axis of second spool 32 departs from mutually, still can realize the regular event of spool.

Fig. 8 is a hydraulicdirectional control valve structural representation according to a seventh embodiment of the invention.As shown in Figure 8, in the hydraulicdirectional control valve of seventh embodiment of the invention, the external diameter of first spool 31 and second spool 32 can be inequality.The external diameter of first spool 31 shown in Fig. 8 is L2, and the external diameter of second spool 32 is L3.Be understood that,, make under the different situation of this two spool external diameters, still can realize the proper functioning of hydraulicdirectional control valve owing to split type valve core structure of the present invention.

Be appreciated that, though the length of first split type in the hydraulicdirectional control valve of the present invention spool 31 and second spool 32 and the length of first valve pocket 21 and second valve pocket 22 are not limited in noted earlier, but obviously this first spool 31 can be identical with the length of second spool 32, also can be inequality, the length of first valve pocket 21 and second valve pocket 22 can be identical, also can be inequality.Fig. 9 illustrates two split type spools, a kind of structure when valve pocket length is inequality.

Figure 10 and Figure 10 a show a kind of controlling method according to hydraulicdirectional control valve of the present invention, have also promptly increased a control port and have realized four bit function controlling methods.As shown in the figure, former hydraulic fluid port as drain tap R can be used as control port K.

As K, X, when the Y hydraulic fluid port is not all introduced pressure oil, first spool 31 and second spool 32 keep the O type function of meta under first elastic component 51 and the effect of second elastic component 52, and P, T, A, B hydraulic fluid port are not connected.

When the X mouth is introduced pressure oil, first spool 31 moves right, first spool 31 passes to second spool 32 by the faying surface with second spool 32 with power, second spool 32 moves right with first spool 31, compress second elastic component 52 and realize left bit function, this moment, the P mouth communicated with the B mouth, and the A mouth communicates with the T mouth.After the pressure oil pressure release, spool is got back to meta under the 52 power effects of second elastic component.

When the Y mouth is introduced pressure oil, second spool 32 is to left movement, second spool 32 passes to first spool 31 by the faying surface with first spool 31 with power, first spool 31 with second spool 32 to left movement, compress first elastic component 51 and realize right bit function, this moment, the P mouth communicated with the A mouth, and the B mouth communicates with the T mouth.After the pressure oil pressure release, spool is got back to meta under the 51 power effects of first elastic component.

When spool during in meta, left side position and right position, the leakage oil between first spool 31 and second spool 32 releases by the K mouth.Shown in Figure 10 a, when the K mouth was introduced pressure oil, first spool 31 overcame first elastic component, 51 power to left movement, and second spool 32 overcomes second elastic component, 52 power and moves right, and this moment, the P mouth communicated with the A mouth, and the P mouth communicates with the B mouth simultaneously, realization P type function.So after this hydraulicdirectional control valve has adopted a kind of novel reversing principle, can under usual pressure oil control mode, realize four bit functions.

Split type valve pocket of the present invention, valve core structure can also apply in other forms of hydraulicdirectional control valve or the hydraulic control system.Provided so a kind of hydraulicdirectional control valve group as shown in figure 11, include spool, valve pocket and valve piece 11, valve pocket is located in the cavity of valve piece, and valve pocket is split type valve pocket, comprises first valve pocket 21 and second valve pocket 22, spool is located in the valve pocket, spool is split type spool, comprises first spool 31 and second spool 32, and wherein split type spool 31,32 is in the synchronous working state, the hydraulicdirectional control valve group is provided with at least three logical hydraulic fluid ports, can realize at least two working positions.

Owing to adopted split type spool, valve pocket structure, can easily spool, valve pocket be integrated in the function that realizes hydraulicdirectional control valve in the valve piece, this hydraulicdirectional control valve group is different from the hydraulicdirectional control valve of traditional absolute construction, because spool directly inserts in the endoporus of valve piece by valve pocket, can reduce being connected of conventional hydraulic selector valve and valve interblock, promptly reduce and reveal link, control and realization are all very convenient, and can realize the rational deployment of whole hydraulic system by the design of valve piece.In addition, spool is integrated into quality and the volume that the valve piece can reduce whole valve block assembly, cost of material greatly reduces.

Be appreciated that split type spool, valve pocket structure among the present invention can apply to have in the various hydraulic control systems of pilot line.Also promptly can provide a kind of hydraulic control system according to the present invention, described hydraulic control system comprises foregoing hydraulicdirectional control valve or hydraulicdirectional control valve group.

Hydraulicdirectional control valve of the present invention, hydraulicdirectional control valve group can apply to comprise concreting machinery, road building machine, excavation machinery, Hoisting Machinery, harbour machinery and piling machinery etc. in all kinds of engineering machinery widely.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (17)

1. hydraulicdirectional control valve is characterized in that comprising:
Valve body;
Valve pocket is located in the cavity of described valve body, and described valve pocket is split type valve pocket, comprises first valve pocket (21) and second valve pocket (22) at least;
Spool is located in the described valve pocket, and described spool is split type spool, comprises first spool (31) and second spool (32) at least, and described first spool (31) and described second spool (32) are in the synchronous working state;
Described hydraulicdirectional control valve is provided with at least three logical hydraulic fluid ports, and described hydraulicdirectional control valve can be realized at least two working positions.
2. hydraulicdirectional control valve according to claim 1 is characterized in that, described valve pocket is the cascade valve pocket, and the cavity of described valve body also is set to cascade, is complementary with the stepped construction of described valve pocket.
3. hydraulicdirectional control valve according to claim 1 is characterized in that, described valve pocket be provided with described valve body on the corresponding logical hydraulic fluid port of pressure hydraulic fluid port, between described valve pocket and the valve body by seal ring (40) sealing.
4. hydraulicdirectional control valve according to claim 1 is characterized in that, also comprises:
First follows spring (81), and directly the end with described first spool (31) connects; And
Second follows spring (82), and directly the end with described second spool (32) connects,
Described first follows spring (81) and second follows spring (82) and is used to keep described first spool (31) and second spool (32) to be in the state of leaning.
5. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that, also comprise the 3rd spool (33), described the 3rd spool (33) is located between described first spool (31) and second spool (32).
6. hydraulicdirectional control valve according to claim 5 is characterized in that, also comprises the 3rd valve pocket (23), and described the 3rd valve pocket (23) is complementary with described the 3rd spool (33).
7. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that, described hydraulicdirectional control valve is the electromagnetic drive type hydraulicdirectional control valve, the end of the end of described first spool (31) and second spool (32) is respectively equipped with first electromagnet (91) and second electromagnet (92), is used to handle the action of described spool.
8. hydraulicdirectional control valve according to claim 7 is characterized in that, described hydraulicdirectional control valve is a Flow valve, and described electromagnet is a proportion electro-magnet, is used for the passing ratio current of electromagnet is controlled flow by the Flow valve valve port.
9. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that the axis disalignment of the axis of described first spool (31) and second spool (32).
10. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that described first spool (31) is inequality with the external diameter of second spool (32).
11. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that, described hydraulicdirectional control valve is the 3-position-3-way hydraulicdirectional control valve, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, and the position that described oil return inlet T is provided with is with respect between described first spool (31) and second spool (32).
12. according to each described hydraulicdirectional control valve in the claim 1 to 4, it is characterized in that, described hydraulicdirectional control valve is the three-position four-way hydraulic selector valve, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, the second actuator port B, reach drain tap R, and the position that described drain tap R is provided with is with respect between described first spool (31) and second spool (32).
13. hydraulicdirectional control valve according to claim 6, it is characterized in that, described hydraulicdirectional control valve is three six logical hydraulicdirectional control valves, described valve body and valve pocket are provided with corresponding pressure hydraulic fluid port P, oil return inlet T, the first actuator port A, the second actuator port B, the 3rd actuator port C, the 4th actuator port D, reach drain tap R, and the position that described drain tap R is provided with is with respect between described first spool (31) and the 3rd spool (33) and between described second spool (32) and the 3rd spool (33).
14. controlling method according to each described hydraulicdirectional control valve in the claim 1 to 13, it is characterized in that, drain tap R on the described valve body is simultaneously as control port K, when spool during in meta, left side position and right position, leakage oil between first spool (31) and second spool (32) releases by described K mouth, when described K mouth is introduced pressure oil, first spool (31) is to left movement, and second spool (32) moves right, P mouth on valve body this moment (10) communicates with the A mouth, the P mouth communicates with the B mouth simultaneously, realizes four bit functions.
15. a hydraulicdirectional control valve group is characterized in that comprising:
The valve piece;
Valve pocket is located in the cavity of described valve piece, and described valve pocket is split type valve pocket, comprises first valve pocket (21) and second valve pocket (22) at least;
Spool is located in the described valve pocket, and described spool is split type spool, comprises first spool (31) and second spool (32) at least, and described first spool (31) and described second spool (32) are in the synchronous working state;
Described hydraulicdirectional control valve group is provided with at least three logical hydraulic fluid ports, and described hydraulicdirectional control valve can be realized at least two working positions.
16. a hydraulic control system is characterized in that, described hydraulic control system comprises according to the described hydraulicdirectional control valve group of each described hydraulicdirectional control valve or claim 15 in the claim 1 to 13.
17. an engineering machinery is characterized in that, described engineering machinery is provided with according to each described hydraulicdirectional control valve in the claim 1 to 13 or hydraulicdirectional control valve group according to claim 14.
CN201110216890A 2010-07-30 2011-07-29 Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve CN102297172B (en)

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CN102297172B (en) 2012-06-06
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CN101893011A (en) 2010-11-24
CN102297171B (en) 2012-07-11
CN102297171A (en) 2011-12-28

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