CN101893011A - Hydraulic valve, hydraulic valve bank and control method thereof - Google Patents

Hydraulic valve, hydraulic valve bank and control method thereof Download PDF

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Publication number
CN101893011A
CN101893011A CN2010102408479A CN201010240847A CN101893011A CN 101893011 A CN101893011 A CN 101893011A CN 2010102408479 A CN2010102408479 A CN 2010102408479A CN 201010240847 A CN201010240847 A CN 201010240847A CN 101893011 A CN101893011 A CN 101893011A
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CN
China
Prior art keywords
spool
valve
hydrovalve
mouth
elastic component
Prior art date
Application number
CN2010102408479A
Other languages
Chinese (zh)
Inventor
易小刚
刘永东
Original Assignee
三一重工股份有限公司
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Publication date
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 CN2010102408479A priority Critical patent/CN101893011A/en
Publication of CN101893011A publication Critical patent/CN101893011A/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 valve, a hydraulic valve bank and a control method thereof. The hydraulic valve comprises a valve body and a valve core, wherein the valve core is arranged in the cavity of the valve body, the valve core is in a split type structure and comprises a first valve core and a second valve core, and a valve pocket can be arranged between the valve body and the valve core. The hydraulic valve bank provided by the invention also comprises a first valve core and a second valve core which form a split type structure, and the valve cores are integrated into a valve block. In the control method of the hydraulic valve and the hydraulic valve bank provided by the invention, oil drain ports R on the valve body or the valve block are simultaneously used as control ports K so as to realize a four-position function. By using the split type valve core structure, the hydraulic valve solves the problems of long matching surface between the valve core and the valve body in the hydraulic valve, difficult accuracy guarantee and inconvenient processing and assembly. Besides, the valve core can not be clamped easily and has high contamination resistance. Additionally, because of the use of the valve pocket, the hydraulic valve has the advantages of good part interchangeability, convenient maintenance and replacement and greatly prolonged overall service life.

Description

Hydrovalve, hydraulic valve bank and controlling method thereof

Technical field

The present invention relates to hydraulic transmission and control technique field, relate in particular to hydrovalve, the hydraulic valve bank of liquid flow path direction in a kind of controlled hydraulic system or flow quantity, the invention still further relates to the hydraulic control system, the engineering machinery that include this hydrovalve or hydraulic valve bank.

Background technique

The hydrovalve 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 hydrovalve structure.As shown in Figure 1, this hydrovalve comprises valve body 1, spool 3, spring 5, end cap 7.Spool 3 is located in the cavity of valve body 1, end cap 7 comprises left end cap 7a and right end cap 7b, be divided into the two ends, the left and right sides of valve body 1, spring 5 comprises left spring 5a and right spring 5b, left spring 5a is arranged in the left end cap 7a and an end of spool 3 leans, and right spring 5b is arranged in the right end cap 7b and the other end of spool 3 leans.Spool 3 comes centering by left spring 5a and right spring 5b, remains on meta.

The both sides control oil pressure of hydrovalve is introduced by X mouth, Y mouth respectively, and when the oil-feed of X mouth, oil pressure promotes spool 3 and moves to the right, compresses right spring 5b and realizes commutation.As shown in Figure 1a, this moment, the P mouth communicated with the B mouth, and the A mouth communicates with the T mouth.After the pressure release of X mouth oil pressure, spool 3 is got back to meta under the effect of right spring 5b, and P mouth, A mouth, B mouth, T mouth respectively do not communicate at this moment; When the oil-feed of Y mouth, oil pressure promotes spool 3 and moves left, and compression left spring 5a also realizes commutation.Shown in Fig. 1 b, this moment, the P mouth communicated with the A mouth, and the B mouth communicates with the T mouth.After the pressure release of Y mouth oil pressure, spool 3 is got back to meta under the effect of left spring 5a.

There is following defective in the hydrovalve of prior art.

Because the spool 3 of hydrovalve be an integrated type, and is longer with the fitting surface of valve body 1, to process very inconveniently, its machining accuracy is difficult to assurance.Be difficult to guarantee less and uniform gap between spool 3 and the valve body 1 during assembling, and the matching gap of spool 3 and valve body 1 is crossed conference and is caused the leak of liquid amount between inner lumen pore to increase, and influences the service behaviour of hydrovalve; If the matching gap between spool and the valve body is too small, make spool 3 hair fasteners easily, it is undesired to commutate.Can only use foundry goods as valve body in the existing hydrovalve.

On the other hand, the hydrovalve of prior art is when work, and integrated type spool 3 is subjected to the influence of hydraulic pressure well cuts easily and causes clamping stagnation, also is that the hydrovalve contamination resistance is relatively poor.After spool 3 wearing and tearing, can't make the reusability of hydrovalve bad by repairing the matching gap of compensating spool 3 and valve body 1.

The patent No. is that 200520034784.6 Chinese utility model patent discloses a kind of " Pneumatic reversal valve " that is used for the automobile hydraulic hoisting system, should " Pneumatic reversal valve " comprise cylinder body, valve body, filler opening, oil outlet, piston and spool are installed respectively in cylinder body and the valve body, and piston and spool adopt split type independent structures separately." Pneumatic reversal valve " of this structure solved the coaxality problem of valve body hole and cylinder bore, can avoid the piston hair fastener problem that causes because of valve body hole and cylinder bore disalignment.But the spool that is somebody's turn to do in " Pneumatic reversal valve " still is an integrated type, exists spool and valve body fitting surface longer equally, the problem of the easy clamping stagnation of spool.

In view of this, provide a kind of hydrovalve 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 hydrovalve, the spool that can solve in the hydrovalve 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 hydrovalve of long service life.

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

Another purpose of the present invention is to provide a kind of hydraulic valve bank, and the spool in this hydraulic valve bank 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, engineering machinery that can overcome the prior art defective.

According to an aspect of the present invention, provide a kind of hydrovalve, comprised valve body and spool, spool is arranged in the cavity of valve body, and in hydrovalve of the present invention, spool is a split-type structural, comprises first spool and second spool.

Further, the external diameter of first end face of first spool and/or second spool is less than the external diameter of its body.

Further, in hydrovalve of the present invention, also comprise valve pocket, this valve pocket is sheathed on the spool, and is positioned at valve body.

Further, in hydrovalve of the present invention, valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket.

Further, be under the situation of split type valve pocket at valve pocket, valve pocket can be designed to cascade, the cavity of valve body also is set to cascade, is complementary with the stepped construction of valve pocket.

Further, valve pocket be provided with valve body on the corresponding logical hydraulic fluid port of pressure hydraulic fluid port.

Further, in hydrovalve of the present invention, seal by seal ring between valve pocket and the valve body.

Further, in hydrovalve of the present invention, also comprise resetting-mechanism, this resetting-mechanism is arranged at the end of spool, is used to drive valve core reset.

Further, above-mentioned resetting-mechanism comprises first elastic component and second elastic component, and first elastic component is located at the second end place of first spool, is used for the second end of this first spool of roof pressure, second elastic component is located at the second end place of second spool, is used for the second end of this second spool of roof pressure.

Further, hydrovalve of the present invention also comprises: first end-cap assembly, be positioned at first end of valve body, and first elastic component is located in first end-cap assembly and the second end by one first sleeve member roof pressure, first spool; Second end-cap assembly is positioned at second end of valve body, and second elastic component is located in second end-cap assembly and the second end by one second sleeve member roof pressure, second spool.

Further, hydrovalve of the present invention also comprises: the 3rd elastic component, be arranged in first sleeve member, and directly the second end with first spool connects; And the 4th elastic component, be arranged in second sleeve member, directly the second end with second spool connects, the 3rd elastic component and the 4th elastic component are used to keep first end of first spool and first end of second spool to be in the state of leaning, wherein first spool and second spool mutually against part release hydraulic oil in the spool split place cavity by drain tap R.

Further, in hydrovalve of the present invention, also comprise the 3rd spool, the 3rd spool is located between first spool and second spool.

Further, in hydrovalve of the present invention, this hydrovalve is the electromagnetic drive type hydrovalve, and the second end of the second end of first spool and second spool is provided with first electromagnet and second electromagnet respectively, is used to handle the action of spool.

Further, hydrovalve can be a Flow valve, and valve body both sides electromagnet adopts proportion electro-magnet, be used for the control of passing ratio current of electromagnet is obtained the accurate control of spool travel, thus the aperture of control spool, with the flow of control by the Flow valve valve port.

Further, in hydrovalve of the present invention, the axis of the axis of first spool and second spool can disalignment.The external diameter of first spool and second spool also can be inequality.

According to another aspect of the present invention, a kind of controlling method of hydrovalve noted earlier is provided, this method comprises: simultaneously as control port K, 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 with the drain tap R on the valve body, when described K mouth is introduced pressure oil, first spool is to left movement, and second spool moves right, and the P mouth communicates with the A mouth on the valve body 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 hydraulic valve bank, included spool, this spool is a split-type structural, comprises first spool and second spool, and spool is integrated in the valve piece.

Further, in above-mentioned hydraulic valve bank, can also include valve pocket, be arranged between valve piece and the spool.

According to hydrovalve of the present invention, have following advantage:

1, owing to adopted split type spool, make that the processing of spool is very convenient, its precision guarantees easily, assembles also very convenient.

2, owing to adopted split type spool, the length of thread engagement of spool and valve body or valve pocket is shortened, reduced clamping stagnation hidden danger, and can utilize the manner of execution of spool, eliminate the clamping stagnation of another spool with a spool, the working efficiency of hydrovalve and working stability are greatly improved.

3, two spool uniform wears in commutation process can improve the spool life-span, and then improve the working life of hydrovalve.For the hydrovalve that is provided with 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, the prior art hydraulic valve body can only be used foundry goods machine shaping, and among the present invention, because spool adopts split-type structural, easy to process, valve body can be realized by forging.

5, adopt split type 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.

According to a further aspect of the invention, also provide a kind of hydraulic control system, this hydraulic control system includes above-mentioned hydrovalve or hydraulic valve bank.

According to a further aspect of the invention, a kind of engineering machinery also is provided, this project mechanically is provided with hydrovalve recited above or hydraulic valve bank, and wherein said engineering machinery one of comprises in concreting machinery, road building machine, excavation machinery, Hoisting Machinery, harbour machinery, piling machinery and the oil equipment.

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 hydrovalve structural representation figure of prior art;

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

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

Fig. 2 is the structural representation according to the hydrovalve 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 hydrovalve 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 hydrovalve of the first embodiment of the present invention time;

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

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

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

Fig. 6 is a hydrovalve structural representation according to a fifth embodiment of the invention;

Fig. 7 is a hydrovalve structural representation according to a sixth embodiment of the invention;

Fig. 7 a is the structural representation according to a kind of modification of the hydrovalve of sixth embodiment of the invention;

Fig. 8 is a hydrovalve structural representation according to a seventh embodiment of the invention;

Fig. 8 a is the structural representation when being Flow valve according to hydrovalve of the present invention;

Fig. 8 b is the structural representation when adopting the manual drives formula according to hydrovalve of the present invention;

Fig. 9 is the hydrovalve structural representation according to the eighth embodiment of the present invention;

Figure 10 is the hydrovalve structural representation according to the ninth embodiment of the present invention;

Figure 11 has increased the schematic representation that a control port realizes four bit function controlling methods for hydrovalve according to the present invention;

Figure 11 a is in the aforementioned controlling method, the schematic representation when two split type spools separate;

Figure 12 shows according to first spool in the hydrovalve of the present invention and the second spool length structure when inequality; And

Figure 13 shows according to the structure that constitutes hydraulic valve bank in the valve piece that spool is 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 hydrovalve of the first embodiment of the present invention, hydrovalve.

As shown in Figure 2, in the first embodiment of the present invention, hydrovalve comprises valve body 10, spool 30, and spool 30 comprises that first spool 31 and second spool, 32, two spools all are arranged in the cavity of valve body 10.

In hydrovalve of the present invention, can on first end of first spool 31, step surface 311 be set, the external diameter of first end face that makes first spool 31 is less than the external diameter of first spool, 31 bodies; On first end of second spool 32, also be provided with step surface 321, the external diameter of first end face that makes second spool 32 is less than the external diameter of second spool, 32 bodies, step surface 311 on first spool and the step surface 321 on second spool can be mutually against, promote each other.

Be appreciated that in the present invention, also can only on first end of first spool 31 or on first end of second spool 32 step surface be set.

In hydrovalve of the present invention, also include resetting-mechanism 50, this resetting-mechanism is arranged at the end of spool 30, is used to drive spool 30 and resets.As shown in Figure 2, resetting-mechanism 50 preferred first elastic component 51 and second elastic components 52 of adopting, first elastic component 51 is located at the second end place of first spool 31, the second end that is used for this first spool 31 of roof pressure, second elastic component 52 is located at the second end place of second spool 32, is used for the second 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, hydrovalve of the present invention also is provided with end-cap assembly 70, 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.

Shown in Fig. 2 a, when needs are realized hydrovalve 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 commutation power by its step surface 311 surface of contact the step surface 321 of second spool 32, 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.

Because spool 30 has adopted split-type structural, first spool 31 and second spool 32 are processed respectively, and machining accuracy and assembly precision all guarantee easily.In addition, adopt the first split type spool 31 and second spool 32, the overall co-ordination length between spool and the valve body 10 is reduced, can reduce the hidden danger of spool clamping stagnation, the contamination resistance of spool is greatly improved.

And in hydrovalve of the present invention, first spool 31 is provided with step surface 311, the second spools 32 and is provided with step surface 321, helps two spools and unhinderedly moves in movement travel.As second spool, 32 clamping stagnations appear when meta, can promote second spool 32 during the commutation of first spool, 31 right sides and eliminate clamping stagnation; First spool, 31 clamping stagnations can promote first spool 31 and eliminate clamping stagnation when meta during the commutation of second spool, 32 left sides.

First spool 31 is provided with on the step surface 311 and second spool 32 and is provided with under the situation of step surface 321, even depart from mutually between the axis of first spool 31 and second spool 32, does not also influence the regular event of two spools.

Fig. 3 is the structural representation of hydrovalve according to a second embodiment of the present invention, and as shown in Figure 3, in this embodiment, hydrovalve also includes valve pocket 20, and this valve pocket 20 is sheathed on the spool 30, and is positioned at valve body 10.

Be appreciated that valve pocket 20 also can only be arranged on a certain section of spool 30, and when be provided with when having hydraulic fluid port on the valve pocket 20 corresponding valve bodies 10, also be provided with on the valve pocket 20 with valve body 10 on the corresponding logical hydraulic fluid port of hydraulic fluid port.

Fig. 4 is the hydrovalve structural representation of a third embodiment in accordance with the invention, and the 3rd embodiment and second embodiment's difference is that valve pocket 20 is split type valve pocket, comprises first valve pocket 21 and second valve pocket 22.

10 of spool 30 and valve bodies add split type first valve pocket 21 and second valve pocket 22, adopt under the prerequisite of split type first spool 31 and second spool 32 at spool 30, do not need to do the coaxality requirement between first valve pocket 21 and second valve pocket 22, even off-centre also can realize its function, 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 get final product, but and therefore first spool 31 and second spool, 32 separate machined process upward very convenient.

Second, third embodiment's the hydrovalve structure according to the present invention; owing between spool 30 and valve body 10, be provided with valve pocket 20; can avoid directly contacting between spool 30 and the valve body 10 wearing and tearing that produce; and valve pocket 20 can adopt the lower material of hardness ratio spool 30; so both can protect spool 30; can when valve pocket 20 wearing and tearing, conveniently change again, and then prolong the working life of hydrovalve on the whole, reduce user cost.

As shown in Figure 3 and Figure 4, in the hydrovalve that is provided with valve pocket 20 of the present invention, no matter valve pocket is an integrated type or split type, can seal ring 40 be set between valve pocket and valve body, is used to seal.Preferably, sealing circle 40 adopts the O RunddichtringO.

Fig. 5 is the structural representation of the hydrovalve of a fourth embodiment in accordance with the invention, as shown in the figure, in this embodiment, equally is provided with first valve pocket 21 and second valve pocket 22 between valve body 10 and split type first 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 fourth 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 hydrovalve 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.

For further guaranteeing the synchronous communicating action of first spool 31 and second spool 32, also provide the fifth embodiment of the present invention.As shown in Figure 6, show according to a fifth embodiment of the invention hydrovalve structure.In this embodiment, first elastic component 51 is located in first end-cap assembly 71 and is leaned the second 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 second end of second spool 32 by one second sleeve member 62.In addition, also have the 3rd elastic component 81, be arranged in first sleeve member 61, the direct the second end with first spool 31 of an end of the 3rd elastic component 81 connects; The 4th elastic component 82 is arranged in second sleeve member 62, and the direct the second end with second spool 32 of an end of the 4th elastic component 82 connects.

In the whole stroke of valve core movement, the 3rd elastic component 81 and the 4th elastic component 82 can be followed the faying surface of first spool 31 and second spool 32 respectively always, also promptly remain 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 hydrovalve, and the 3rd elastic component 81 that increases can be fitted in the left side of 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 hydrovalve, and the 4th elastic component 82 that increases can be fitted in the right side of 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. 6 and other figure, first spool 31 and second spool 32 mutually against part release hydraulic oil in the spool split place cavity by drain tap R, be in the state of leaning with first end that keeps first spool 31 and first end of second spool 32.

Fig. 7 shows hydrovalve structure according to a sixth embodiment of the invention.As shown in Figure 7, in 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. 7 a shows the structure according to a kind of modification of the hydrovalve of sixth embodiment of the invention.Wherein also be provided with and the 3rd spool 33 corresponding the 3rd valve pockets 23.

Fig. 8 is a hydrovalve structural representation according to a seventh embodiment of the invention.Different is with each embodiment of front, in the 7th embodiment, hydrovalve is the electromagnetic drive type hydrovalve, and the second end of the second end of first spool 31 and second spool 32 is provided with first electromagnet 91 and second electromagnet 92 respectively, is used to handle the action of described spool.

Shown in Fig. 8 a, hydrovalve 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 hydrovalve 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. 8 b, hydrovalve of the present invention can also be a manual drives formula hydrovalve, and 95,96 is the manual drives handle among the figure.

As shown in Figure 9, be structure according to the hydrovalve of the eighth embodiment of the present invention.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.Owing to adopted split type valve core structure among the present invention, and be respectively arranged with step surface 311 and step surface 321 on first spool 31 and second spool 32, and 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.

Figure 10 is the hydrovalve structural representation according to the ninth embodiment of the present invention.As shown in figure 10, in hydrovalve of the present invention, the external diameter of first spool 31 and second spool 32 can be inequality.The external diameter of first spool 31 shown in Figure 10 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 hydrovalve owing to split type valve core structure of the present invention.

Figure 11 and Figure 11 a show a kind of controlling method according to hydrovalve of the present invention.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 11 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 hydrovalve has adopted a kind of novel reversing principle, can under usual pressure oil control mode, realize four bit functions.

Though be appreciated that first split type in the hydrovalve of the present invention spool 31 and the length of second spool 32 not to be limited in noted earlier that obviously this first spool 31 can be identical with the length of second spool 32, also can be inequality.Figure 12 illustrates a kind of structure of two split type spool length when inequality.

Split type valve core structure of the present invention can also apply in other forms of hydrovalve or the hydraulic control system.Provided so a kind of hydraulic valve bank as shown in figure 13.Wherein split type spool 31,32 is integrated in the valve piece 11.

Certainly, in the hydraulic valve bank of this form, can between valve piece 11 and spool, be provided with valve pocket equally.This split type spool, by split type valve pocket, can easily spool be integrated in the function that realizes hydrovalve in the valve piece, this hydraulic valve bank is different from the hydrovalve of traditional absolute construction, because spool directly inserts by valve pocket in the endoporus of valve piece, can reduce being connected of conventional hydraulic valve and valve interblock, promptly reduce the leakage 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 the split type valve core structure among the present invention can apply to have in the various hydraulic control systems of pilot line.

Hydrovalve of the present invention, hydraulic valve bank can apply to comprise concreting machinery, road building machine, excavation machinery, Hoisting Machinery, harbour machinery, piling machinery and oil equipment 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 (22)

1. a hydrovalve comprises valve body and spool, and described spool is arranged in the cavity of described valve body, it is characterized in that, described spool is a split-type structural, comprises first spool and second spool.
2. hydrovalve according to claim 1 is characterized in that, the external diameter of first end face of described first spool and/or second spool is less than the external diameter of its body.
3. hydrovalve according to claim 2 is characterized in that described hydrovalve also comprises valve pocket, and described valve pocket is sheathed on the described spool, and is positioned at described valve body.
4. hydrovalve according to claim 3 is characterized in that described valve pocket is split type valve pocket, comprises first valve pocket and second valve pocket.
5. hydrovalve according to claim 4 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.
6. hydrovalve according to claim 3 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.
7. according to each described hydrovalve in the claim 3 to 6, it is characterized in that, seal by seal ring between described valve pocket and the valve body.
8. according to each described hydrovalve in the claim 1 to 6, it is characterized in that also comprise resetting-mechanism, described resetting-mechanism is arranged at the end of described spool, is used to drive described valve core reset.
9. hydrovalve according to claim 8, it is characterized in that, described resetting-mechanism comprises first elastic component and second elastic component, described first elastic component is located at the second end place of described first spool, the second end that is used for this first spool of roof pressure, described second elastic component is located at the second end place of described second spool, is used for the second end of this second spool of roof pressure.
10. hydrovalve according to claim 9 is characterized in that, also comprises:
First end-cap assembly is positioned at first end of described valve body, and described first elastic component is located in described first end-cap assembly and the second end by described first spool of one first sleeve member roof pressure;
Second end-cap assembly is positioned at second end of described valve body, and described second elastic component is located in described second end-cap assembly and the second end by described second spool of one second sleeve member roof pressure.
11. hydrovalve according to claim 10 is characterized in that, also comprises:
The 3rd elastic component is arranged in described first sleeve member, and directly the second end with described first spool connects; And
The 4th elastic component is arranged in described second sleeve member, and directly the second end with described second spool connects,
Described the 3rd elastic component and the 4th elastic component are used to keep first end of described first spool and first end of second spool to be in the state of leaning, wherein first spool and second spool mutually against part release hydraulic oil in the spool split place cavity by drain tap R.
12., it is characterized in that also comprise the 3rd spool, described the 3rd spool is located between described first spool and second spool according to each described hydrovalve in the claim 1 to 6.
13. according to each described hydrovalve in the claim 1 to 6, it is characterized in that, described hydrovalve is the electromagnetic drive type hydrovalve, and the second end of the second end of described first spool and second spool is provided with first electromagnet and second electromagnet respectively, is used to handle the action of described spool.
14. hydrovalve according to claim 13 is characterized in that, described hydrovalve 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.
15., it is characterized in that the axis disalignment of the axis of described first spool and second spool according to each described hydrovalve in the claim 1 to 6.
16., it is characterized in that the external diameter of described first spool and second spool is inequality according to each described hydrovalve in the claim 1 to 6.
17. controlling method according to each described hydrovalve in the claim 1 to 16, it is characterized in that, 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.
18. a hydraulic valve bank includes spool and valve piece, it is characterized in that described spool is a split-type structural, comprises first spool and second spool, described spool is integrated in the valve piece.
19. hydraulic valve bank according to claim 18 is characterized in that, also includes valve pocket, is arranged between described valve piece and the spool.
20. controlling method according to claim 18 or 19 described hydraulic valve bank, it is characterized in that, drain tap R on the described valve piece 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 piece communicates with the A mouth at this moment, the P mouth communicates with the B mouth simultaneously, realizes four bit functions.
21. a hydraulic control system is characterized in that, described hydraulic control system comprises according to each described hydraulic valve bank in each described hydrovalve or the claim 18 to 19 in the claim 1 to 16.
22. engineering machinery, it is characterized in that, described engineering machinery is provided with according to each described hydrovalve in the claim 1 to 16 or according to each described hydraulic valve bank in the claim 18 to 19, and wherein said engineering machinery one of comprises in concreting machinery, road building machine, excavation machinery, Hoisting Machinery, harbour machinery, piling machinery and the oil equipment.
CN2010102408479A 2010-07-30 2010-07-30 Hydraulic valve, hydraulic valve bank and control method thereof CN101893011A (en)

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CN2010102408479A CN101893011A (en) 2010-07-30 2010-07-30 Hydraulic valve, hydraulic valve bank and control method thereof
PCT/CN2011/077822 WO2012013160A1 (en) 2010-07-30 2011-07-29 Hydraulic directional control valve, set and control method thereof
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
PCT/CN2011/077809 WO2012013158A1 (en) 2010-07-30 2011-07-29 Hydraulic valve, hydraulic valve set, and control method for hydraulic valve
CN201110216709A CN102297171B (en) 2010-07-30 2011-07-29 Hydraulic valve, hydraulic valve group and hydraulic valve control method

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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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CN103133448A (en) * 2013-02-28 2013-06-05 北京理工大学 Energy-saving hydraulic valve with independently-controllable load throttle mouths and hydraulic valve control system
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WO2012013160A1 (en) * 2010-07-30 2012-02-02 湖南三一智能控制设备有限公司 Hydraulic directional control valve, set and control method thereof
WO2012013158A1 (en) * 2010-07-30 2012-02-02 湖南三一智能控制设备有限公司 Hydraulic valve, hydraulic valve set, and control method for hydraulic valve
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CN103133448A (en) * 2013-02-28 2013-06-05 北京理工大学 Energy-saving hydraulic valve with independently-controllable load throttle mouths and hydraulic valve control system
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CN105422921A (en) * 2016-01-08 2016-03-23 浙江大学 Digital valve unit and combination and control method thereof

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CN102297172B (en) 2012-06-06
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CN102297171B (en) 2012-07-11
CN102297172A (en) 2011-12-28
CN102297171A (en) 2011-12-28

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