CN102297172B - 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 PDFInfo
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- CN102297172B CN102297172B CN201110216890A CN201110216890A CN102297172B CN 102297172 B CN102297172 B CN 102297172B CN 201110216890 A CN201110216890 A CN 201110216890A CN 201110216890 A CN201110216890 A CN 201110216890A CN 102297172 B CN102297172 B CN 102297172B
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- valve pocket
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-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
- F16K11/065—Multiple-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
- F16K11/07—Multiple-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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
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
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 flow 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 that is used for flow direction control or flow control in the hydraulic system is used very extensively, 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.
Shown in Figure 1 is 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 by X ', Y ' mouthful introducing, shown in Fig. 1 a, when X ' mouthful of oil-feed; Oil pressure promotes integral core 3 ' and moves to the right; Compress second Returnning spring 5 ' and realization switching-over, 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 switching-over, 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 '.
Defective below the hydraulicdirectional control valve of existing technology exists.
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 ', processing is very inconvenient, 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 ' received 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 existing technology 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 existing technology defective.
For realizing above-mentioned purpose, according to an aspect of the present invention, a kind of hydraulicdirectional control valve is provided, comprising: valve body; Valve pocket is located in the cavity of valve body, and said valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket; Spool; Be located in the said valve pocket, said spool is split type spool, comprises first spool and second spool; The external diameter of the end face that is in contact with one another of said first spool and second spool is less than the external diameter of its body, and said first spool and second spool are in the synchronous working state; Said hydraulicdirectional control valve is provided with four or five or six logical hydraulic fluid ports, can realize two or three working positions.
Logical hydraulic fluid port among the present invention comprises actuator port, pressure hydraulic fluid port and return opening.
Further, said valve pocket is the cascade valve pocket, and the cavity of said valve body also is set to cascade, is complementary with the stepped construction of said valve pocket.
Further, said valve pocket be provided with said valve body on the corresponding logical hydraulic fluid port of pressure hydraulic fluid port, between said valve pocket and the valve body through seal ring sealing.
Further, this hydraulicdirectional control valve also comprises:
First follows spring, and directly the end with said first spool connects; And
Second follows spring, and directly the end with said second spool connects,
Said first follows spring and second follows spring and is used to keep said first spool and second spool to be in the state of leaning.
Further, this hydraulicdirectional control valve also comprises the 3rd spool, and said the 3rd spool is located between said first spool and second spool.
Further, this hydraulicdirectional control valve also comprises the 3rd valve pocket, and said the 3rd valve pocket and said the 3rd spool are complementary.
Further, said hydraulicdirectional control valve is the electromagnetic drive type hydraulicdirectional control valve, and the end of the end of said first spool and second spool is respectively equipped with first electromagnet and second electromagnet, is used to handle the action of said spool.
Further, said hydraulicdirectional control valve is a Flow valve, and said electromagnet is a proportion electro-magnet, is used for the passing ratio current of electromagnet is controlled the flow through the Flow valve valve port.
Further, the axis disalignment of the axis of said first spool and second spool.
Further, the external diameter of said first spool and second spool is inequality.
According to another aspect of the present invention, a kind of controlling method of hydraulicdirectional control valve recited above is provided, the drain tap R on the said valve body is simultaneously as control port K; When spool during in meta, left side position and right position, the leakage oil between first spool and second spool releases through said K mouth, when said K mouth introducing 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, a kind of hydraulicdirectional control valve group is provided, has comprised: the valve piece; Valve pocket is located in the cavity of said valve piece, and said valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket; Spool; Be located in the said valve pocket, said spool is split type spool, comprises first spool and second spool; The external diameter of the end face that is in contact with one another of said first spool and second spool is less than the external diameter of its body, and said first spool and second spool are in the synchronous working state; Said hydraulicdirectional control valve is provided with four or five or six logical hydraulic fluid ports, and said hydraulicdirectional control valve can be realized two or three working positions.
According to a further aspect of the invention, a kind of hydraulic control system is provided, said hydraulic control system comprises foregoing hydraulicdirectional control valve or hydraulicdirectional control valve group.
According to a further aspect of the invention, a kind of engineering machinery is provided, said 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, cooperates and change into valve pocket, and 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 do 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 since the spool split, the manner of execution of spool capable of using; Clamping stagnation through another spool of spool elimination greatly improves the working efficiency of hydraulicdirectional control valve and working stability.
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 the wearing and tearing with compensating spool through changing valve pocket, parts interchangeability and reusability are good, have reduced user cost.
4, existing technology hydraulicdirectional control valve valve body can only be used foundry goods machine shaping, and easy to process owing to spool, valve pocket adopt split-type structural among the present invention, valve body can be realized through 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.
Except top described purpose, characteristic and advantage, other purpose, characteristic and advantage that the present invention has are with combining accompanying drawing to do further detailed explanation.
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 explaining 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 existing technology;
Fig. 1 a is the schematic representation that the hydraulicdirectional control valve work of existing technology the time is in position, a left side;
Fig. 1 b is the schematic representation that the hydraulicdirectional control valve work of existing technology 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. 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 characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
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 said 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 letting 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 concrete design according to needed meta function, and two spools 31,32 are through 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, be 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 through the X mouth toward first elastic component, 51 cavitys, promote first spool 31 and move to the right; First spool 31 passes to second spool 32 through its end face surface of contact with switching-over 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 toward second elastic component, 52 cavitys, can promote second spool 32 with first spool 31 arrives valve body 10 left sides simultaneously through the Y mouth, realization P mouth and B mouth, the A mouth is communicated with the T mouth.
It is thus clear that 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 through the meta of making a concerted effort to remain on of first elastic component 51 and second elastic component 52.
In hydraulicdirectional control valve of the present invention; Owing to adopted split type valve pocket, realize sealing through 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 need not 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 needs 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, and machining accuracy and assembly precision be assurance easily all, and easy to assembly; The spool length of thread engagement shortens; Reduced clamping stagnation hidden danger, and the manner of execution of spool capable of using, with the clamping stagnation of another spool of spool elimination.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 the wearing and tearing with compensating spool through 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.Through drain tap being done control mouthful use, can realize four commutation function (back will specify).
Fig. 3 is the structural representation of hydraulicdirectional control valve according to a second embodiment of the present invention, and is as shown in the figure, in this embodiment, between the first split type spool 31 and second spool 32, is provided with first valve pocket 21 and second valve pocket 22 equally.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 great facility, and the convenient simultaneously sealing means through 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 through 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; Can the leakage oil between first spool 31 and second spool 32 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, the third embodiment of the present invention is provided also.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 through one first sleeve member 61, and second elastic component 52 is located at the end that leans second spool 32 in second end-cap assembly 72 and through one second sleeve member 62.In addition, also have first and follow spring 81, be arranged in first sleeve member 61, first follow spring 81 an end directly connect with the end of first spool 31; Second follows spring 82, be arranged in second sleeve member 62, this second follow spring 82 an end directly connect with the end of second spool 32.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 lean on 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 in spool when action can make second spool 32 separate with first spool 31, influence the switching-over 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.
Likewise; When first spool 31 and second spool 32 all were in valve body 10 right positions, first spool 31 separated with first elastic component 51, and 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 in spool when action can make first spool 31 separate with second spool 32, influence the switching-over 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.
Shown in Fig. 4 and other figure; First spool 31 and second spool 32 each other against the part place release the hydraulic oil in the spool split place cavity through 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 like Fig. 2; The invention provides a kind of three-position four-way hydraulic selector valve; Said 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 said drain tap R is provided with is with respect between said 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, and this moment, the both sides electromagnet adopted proportion electro- magnet 93,94; When the spool of hydraulicdirectional control valve drove with proportion electro-magnet, the electromagnetic force of proportion electro-magnet size passing ratio current of electromagnet was regulated, through the Current Control to passing ratio electromagnet 93,94; Obtain suitable electromagnetic force; And the displacement amount of the size of electromagnetic force decision spool, thereby the accurate control of acquisition spool 31,32 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 through 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 moving handle of manual Ma Qu 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 the split type valve core structure owing to the present invention adopted makes under this two spool external diameter condition of different, still can realize the proper functioning of hydraulicdirectional control valve.
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 be in first elastic component 51 and 52 effects of second elastic component O type function of maintenance meta down, 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, the second spools 32 through the faying surface with second spool 32 with power and moves right with first spool 31, compresses second elastic component 52 and realizes 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 through with the faying surface of first spool 31 with power pass to first spool, 31, the first spools 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 through 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.Shown in figure 11ly provided so a kind of hydraulicdirectional control valve group, included spool, valve pocket and valve piece 11, valve pocket is located in the cavity of valve piece; Valve pocket is split type valve pocket, comprises first valve pocket 21 and second valve pocket 22, and 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 through 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 through 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 according to the present invention a kind of hydraulic control system can be provided, said 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 merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. hydraulicdirectional control valve is characterized in that comprising:
Valve body;
Valve pocket is located in the cavity of said valve body, and said valve pocket is split type valve pocket, comprises first valve pocket (21) and second valve pocket (22);
Spool; Be located in the said valve pocket; Said spool is split type spool; Comprise first spool (31) and second spool (32), the external diameter of the end face that said first spool and second spool are in contact with one another is less than the external diameter of its body, and said first spool (31) and said second spool (32) are in the synchronous working state;
Said hydraulicdirectional control valve is provided with four or five or six logical hydraulic fluid ports, and said hydraulicdirectional control valve can be realized two or three working positions.
2. hydraulicdirectional control valve according to claim 1 is characterized in that, said valve pocket is the cascade valve pocket, and the cavity of said valve body also is set to cascade, is complementary with the stepped construction of said valve pocket.
3. hydraulicdirectional control valve according to claim 1 is characterized in that, said valve pocket be provided with said valve body on the corresponding logical hydraulic fluid port of pressure hydraulic fluid port, between said valve pocket and the valve body through 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 said first spool (31) connects; And
Second follows spring (82), and directly the end with said second spool (32) connects,
Said first follows spring (81) and second follows spring (82) and is used to keep said 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), said the 3rd spool (33) is located between said 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 said the 3rd valve pocket (23) is complementary with said the 3rd spool (33).
7. according to each described hydraulicdirectional control valve in the claim 1 to 4; It is characterized in that; Said hydraulicdirectional control valve is the electromagnetic drive type hydraulicdirectional control valve; The end of the end of said 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 said spool.
8. hydraulicdirectional control valve according to claim 7 is characterized in that, said hydraulicdirectional control valve is a Flow valve, and said electromagnet is a proportion electro-magnet, is used for the passing ratio current of electromagnet is controlled the flow through 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 said 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 said first spool (31) is inequality with the external diameter of second spool (32).
11. the controlling method according to each described hydraulicdirectional control valve in the claim 1 to 10 is characterized in that, the drain tap R on the said 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 through said K mouth, and when said K mouth was introduced pressure oil, first spool (31) was to left movement; And second spool (32) moves right; P mouth on valve body this moment (10) communicates with the A mouth, and the P mouth communicates with the B mouth simultaneously, realizes four bit functions.
12. a hydraulicdirectional control valve group is characterized in that comprising:
The valve piece;
Valve pocket is located in the cavity of said valve piece, and said valve pocket is split type valve pocket, comprises first valve pocket (21) and second valve pocket (22);
Spool; Be located in the said valve pocket; Said spool is split type spool; Comprise first spool (31) and second spool (32), the external diameter of the end face that said first spool and second spool are in contact with one another is less than the external diameter of its body, and said first spool (31) and said second spool (32) are in the synchronous working state;
Said hydraulicdirectional control valve group is provided with four or five or six logical hydraulic fluid ports, and said hydraulicdirectional control valve can be realized two or three working positions.
13. a hydraulic control system is characterized in that, said hydraulic control system comprises according to the described hydraulicdirectional control valve group of each described hydraulicdirectional control valve or claim 12 in the claim 1 to 10.
14. engineering machinery; It is characterized in that; Said engineering machinery is provided with according to each described hydraulicdirectional control valve in the claim 1 to 10 or hydraulicdirectional control valve group according to claim 12, and wherein said engineering machinery one of comprises in concreting machinery, road building machine, excavation machinery, Hoisting Machinery, harbour machinery, the piling machinery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110216890A CN102297172B (en) | 2010-07-30 | 2011-07-29 | Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve |
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| CN2010102408479A CN101893011A (en) | 2010-07-30 | 2010-07-30 | Hydraulic valve, hydraulic valve bank and control method thereof |
| CN201010240847.9 | 2010-07-30 | ||
| CN201110216890A CN102297172B (en) | 2010-07-30 | 2011-07-29 | Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve |
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| CN102297172A CN102297172A (en) | 2011-12-28 |
| CN102297172B true CN102297172B (en) | 2012-06-06 |
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| CN2010102408479A Pending CN101893011A (en) | 2010-07-30 | 2010-07-30 | Hydraulic valve, hydraulic valve bank and control method thereof |
| CN201110216890A Active CN102297172B (en) | 2010-07-30 | 2011-07-29 | Hydraulic directional control valve, hydraulic directional control valve box and control method of hydraulic directional control valve |
| CN201110216709A Active CN102297171B (en) | 2010-07-30 | 2011-07-29 | Hydraulic valve, hydraulic valve group and hydraulic valve control method |
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| WO (2) | WO2012013160A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012013160A1 (en) | 2012-02-02 |
| CN102297171B (en) | 2012-07-11 |
| CN102297171A (en) | 2011-12-28 |
| CN102297172A (en) | 2011-12-28 |
| WO2012013158A1 (en) | 2012-02-02 |
| CN101893011A (en) | 2010-11-24 |
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