CN105370655A - Multi-mode double-oil-way electric-hydraulic proportional overflow speed regulating valve - Google Patents
Multi-mode double-oil-way electric-hydraulic proportional overflow speed regulating valve Download PDFInfo
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- CN105370655A CN105370655A CN201510939408.XA CN201510939408A CN105370655A CN 105370655 A CN105370655 A CN 105370655A CN 201510939408 A CN201510939408 A CN 201510939408A CN 105370655 A CN105370655 A CN 105370655A
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- Prior art keywords
- oil
- valve
- valve body
- valve rod
- groove
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Classifications
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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
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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
- F15B13/022—Flow-dividers; Priority 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
- F16K11/0708—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 comprising means to avoid jamming of the slide or means to modify the flow
Abstract
The invention discloses a multi-mode double-oil-way electric-hydraulic proportional overflow speed regulating valve. The multi-mode double-oil-way electric-hydraulic proportional overflow speed regulating valve comprises a six-position five-port electric-hydraulic proportional valve, wherein the six-position five-port electric-hydraulic proportional valve comprises a valve body; a valve rod which moves in the axial direction is mounted in the valve body; seven logical oil grooves are formed in the valve body; three logical oil grooves are formed in the valve rod; a multi-section throttling device is arranged on the valve rod; the seven logical oil grooves in the valve body, the three logical oil grooves of the valve rod and the multi-section throttling device have strict logics; through the logics, a multi-section throttling speed regulating oil way is formed; an electromagnetic control mechanism which drives the valve rod to move is mounted at one end of the valve body of the six-position five-port electric-hydraulic proportional valve; a valve rod returning device is mounted at the other end of the valve body of the six-position five-port electric-hydraulic proportional valve; and two electric-hydraulic proportional overflow valves which are communicated with the throttling speed regulating oil way and are used for relieving pressure are mounted on the valve body of the six-position five-port electric-hydraulic proportional valve. The speed regulating valve disclosed by the invention is high in integration degree, sensitive in speed regulating response, compact in structure, reasonable in integrated layout, convenient to mount and maintain and reliable in sealing performance.
Description
Technical field
The present invention relates to hydraulic system technical field, particularly the two oil circuit electric-hydraulic proportion overflowing and speed valve of a kind of multi-mode.
Background technique
Series flow control valve is the critical elements in flow control circuit, its service behaviour directly affects the stability of whole hydraulic system, series flow control valve mostly is Fixed differential reducing valve and throttle valve is in series in the market, by changing the method for pressure reduction before and after the flow area of restriction and control orifice, realize changing the flow entering final controlling element and carry out speed governing, but existing series flow control valve is by multiple element manipulation, integration degree is low, can only work at single oil circuit, function singleness, and due to problems such as restriction loss cause greatly heating serious, be only applicable to lower-powered occasion.
Summary of the invention
Technical problem to be solved by this invention is to provide the two oil circuit electric-hydraulic proportion overflowing and speed valve of a kind of multi-mode, the two oil circuit electric-hydraulic proportion overflowing and speed valve of this multi-mode works in two oil circuit hydraulic system, by changing the logical place of six five-way electro-hydraulic proportional valves, simultaneously according to the oil pressure relief of load behavior and electricity liquid ratio relief valve, the two oil circuit flow control circuit of multi-mode can be formed.The two oil circuit electricity liquid ratio relief valve integration degree of multi-mode of the present invention is high, and integral layout is flexible, and speed governing is quick on the draw, and equipment reliability is high, and the feature of environmental protection is strong, energy-conservation height and convenient for installation and maintenance.
For solving the problems of the technologies described above, technological scheme of the present invention is: the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode, comprise six five-way electro-hydraulic proportional valves, described six five-way electro-hydraulic proportional valves comprise valve body, the valve rod moved axially is installed in described valve body, seven logic oil grooves are provided with in described valve body, described valve rod is provided with three logic oil grooves, described valve rod is provided with multistage throttling arrangement, in described valve body, on seven logic oil grooves and described valve rod, three logic oil grooves and multistage throttling arrangement have strict logic, multistage throttling governor oil road is formed by these logics,
Described six five-way electric-hydraulic proportion valve body one end are provided with the Electromagnetic Control mechanism driving described valve rod movement, and described six five-way electric-hydraulic proportion valve body the other ends are provided with valve rod returning device; The valve body of described six five-way electro-hydraulic proportional valves is provided with two electricity liquid ratio relief valves for pressure release be communicated with described throttle grverning oil circuit.
As the preferred technological scheme of one, in described valve body, arrangement is provided with seven logic oil grooves, comprise valve body first oil groove, valve body second oil groove, valve body the 3rd oil groove, valve body the 4th oil groove, valve body the 5th oil groove, valve body the 6th oil groove and valve body the 7th oil groove, described valve body first oil groove and described valve body the 5th oil groove bridge joint shape component oil oil duct, described valve body the 4th oil groove and described valve body the 7th oil groove bridge joint form public oil return oil duct.
As the preferred technological scheme of one, described valve body second oil groove top has the first oil outlet, described valve body the 5th oil groove top has the second oil outlet, described valve body the 3rd oil groove bottom has the first filler opening, described valve body the 4th oil groove bottom has return opening, described valve body the 6th oil groove bottom has the second filler opening, and described valve body the 3rd oil groove and described valve body the 6th oil groove top have the first public oil duct and the second public oil duct.
As the preferred technological scheme of one, the oil input channel of the in described valve body first public oil duct and a described electricity liquid ratio relief valve is provided with logical construction, is integrated with the first electricity liquid ratio relief valve; Described second public oil duct and the oil input channel of electricity liquid ratio relief valve described in another are provided with logical construction, are integrated with the second electricity liquid ratio relief valve; The back oil road of described public oil return oil duct and two described electricity liquid ratio relief valves is provided with logical construction, is integrated with the first electricity liquid ratio relief valve or the second electricity liquid ratio relief valve.
As the preferred technological scheme of one, described valve rod is provided with three logic oil grooves, comprise valve rod first oil groove, valve rod second oil groove and valve rod the 3rd oil groove, valve rod cavity is provided with in described valve rod, the outer surface of described valve rod is divided into four shaft shoulders by three described valve rod oil grooves, the described shaft shoulder comprises first shaft shoulder, second shaft shoulder, the 3rd shaft shoulder and the 4th shaft shoulder, and described multistage throttling arrangement is arranged on the described shaft shoulder.
As the preferred technological scheme of one, described multistage throttling arrangement first shaft shoulder comprised near described valve rod first oil groove side is provided with 2-4 axially symmetrical radial circular aperture, and described radial circular aperture is communicated with described valve rod cavity; 2-4 axial symmetrical radial triangular groove type restriction is independently provided with on the 3rd shaft shoulder of described valve rod second oil groove; 2-4 axial symmetrical radial ring joint restriction is provided with on the right side of described radial triangular groove type restriction; Be respectively equipped with 2-4 radial logic groove and 2-4 radial circular aperture on the right side of described radial ring joint restriction, described radial circular aperture is communicated with described valve rod cavity, and described logic groove is alternate with described radial circular aperture to be staggered and axis is symmetrical; Described ring joint restriction is connected with described logic groove;
Described valve rod is provided with 2-4 axial symmetrical radial triangular groove type restriction near the 3rd shaft shoulder of valve rod the 3rd oil groove; 2-4 axial symmetrical radial ring joint restriction is independently provided with on the 4th shaft shoulder of the 3rd oil groove; Be respectively equipped with 2-4 logic groove and 2-4 radial circular aperture on the right side of described dovetail groove restriction, described radial circular aperture is communicated with described valve rod cavity, and described logic groove is alternate with described radial circular aperture to be staggered and axis is symmetrical.
As the preferred technological scheme of one, described Electromagnetic Control mechanism comprises solenoid-operated proportional pilot valve, displacement transducer and piston mechanism, and described solenoid-operated proportional pilot valve is arranged on one end of described valve body.
As the preferred technological scheme of one, described solenoid-operated proportional pilot valve comprises coil, housing, proportion electro-magnet, spool and power transmission spring, described coil is arranged on housing two ends, described proportion electro-magnet is arranged in described coil, the right-hand member of described proportion electro-magnet is provided with power transmission spring, be provided with described spool in described power transmission spring, described spool is arranged in described housing cavity, and the left end of described spool is connected with described proportion electro-magnet.
As the preferred technological scheme of one, described valve rod returning device comprises the bonnet be connected with described six five-way electric-hydraulic proportion valve body one end by bearing pin, Returnning spring and spring seat is provided with in described bonnet, described spring is located on spring seat, described spring seat comprises left end spring seat and right-hand member spring seat, described left end spring seat is connected with described valve rod, and described right-hand member spring seat is connected with described bonnet.
Owing to have employed technique scheme, the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode, comprise six five-way electro-hydraulic proportional valves, described six five-way electro-hydraulic proportional valves comprise valve body, the valve rod moved axially is installed in described valve body, seven logic oil grooves are provided with in described valve body, described valve rod is provided with three logic oil grooves, described valve rod is provided with multistage throttling arrangement, in described valve body, on seven logic oil grooves and valve rod, three logic oil grooves and multistage throttling arrangement have strict logic, multistage throttling governor oil road is formed by these logics, described six five-way electric-hydraulic proportion valve body one end are provided with the Electromagnetic Control mechanism driving described valve rod movement, described six five-way electric-hydraulic proportion valve body the other ends are provided with valve rod returning device, the valve body of described six five-way electro-hydraulic proportional valves is provided with two electricity liquid ratio relief valves be communicated with described throttle grverning oil circuit for pressure release, series flow control valve integration degree of the present invention is high, and speed governing is quick on the draw, compact structure, and integral layout is reasonable, and convenient for installation and maintenance, sealability is reliable.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of six five-way electro-hydraulic proportional valves in the series flow control valve of the embodiment of the present invention;
The series flow control valve structural representation of Fig. 2 position embodiment of the present invention;
Fig. 3 is six five-way electro-hydraulic proportional valve valve body structure schematic diagram in the series flow control valve of the embodiment of the present invention;
Fig. 4 is six five-way electro-hydraulic proportional valve stem structure schematic diagram in the embodiment of the present invention;
Fig. 4 a be in Fig. 4 A-A to sectional view;
Fig. 4 b be in Fig. 4 B-B to sectional view;
Fig. 4 c be in Fig. 4 C-C to sectional view;
Fig. 4 d be in Fig. 4 D-D to sectional view;
Fig. 4 e be in Fig. 4 E-E to sectional view;
Fig. 4 f be in Fig. 4 F-F to sectional view;
Fig. 4 g be in Fig. 4 G-G to sectional view;
Fig. 5 is the series flow control valve fundamental diagram of the embodiment of the present invention;
Fig. 6 a is that the valve rod in the embodiment of the present invention is in neutral position working state schematic representation for the moment;
Fig. 6 b is the fundamental diagram that Fig. 6 a is corresponding;
Fig. 7 a is the working state schematic representation of the valve rod left side in embodiment of the present invention when sliding to valve-rod cavity position two;
Fig. 7 b is the fundamental diagram that Fig. 7 a is corresponding;
Fig. 8 a is the working state schematic representation of the valve rod left side in embodiment of the present invention when sliding to valve-rod cavity position three;
Fig. 8 b is the fundamental diagram that Fig. 8 a is corresponding;
Fig. 9 a be a valve rod left side for the embodiment of the present invention when sliding to valve-rod cavity position four working state schematic representation;
Fig. 9 b is the fundamental diagram that Fig. 9 a is corresponding;
Figure 10 a is the working state schematic representation of a valve rod left side for the embodiment of the present invention when sliding to valve-rod cavity position five;
Figure 10 b is the fundamental diagram that Figure 10 a is corresponding;
Figure 11 a is the working state schematic representation of a valve rod left side for the embodiment of the present invention when sliding to valve-rod cavity position six;
Figure 11 b is the fundamental diagram that Figure 11 a is corresponding;
In figure: 1-valve body; 2-valve rod; 3-bonnet; 4-Returnning spring; 5-solenoid-operated proportional pilot valve; 6-displacement transducer; 7-piston mechanism; 8-first electricity liquid ratio relief valve; 9-second electricity liquid ratio relief valve; The public oil return oil duct of 10-; 11-divides oil duct; The public oil duct of 12-first; The public oil duct of 13-second; 14-first shaft shoulder; 15-the 3rd shaft shoulder; 16-the 4th shaft shoulder; 17-valve rod cavity; The fuel-displaced hydraulic fluid port of A-first; The fuel-displaced hydraulic fluid port of B-second; P1-first filler opening; P2-second oil outlet; T-return opening; 1a-valve body first oil groove; 2a-valve body second oil groove; 3a-valve body the 3rd oil groove; 4a-valve body the 4th oil groove; 5a-valve body the 5th oil groove; 6a-valve body the 6th oil groove; 7a-valve body the 7th oil groove; 1b-valve rod first oil groove; 2b-valve rod second oil groove; 3b-valve rod the 3rd oil groove.
Embodiment
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection domain of claim.
As depicted in figs. 1 and 2, the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode, comprise six five-way electro-hydraulic proportional valves, described six five-way electro-hydraulic proportional valves comprise valve body 1, the valve rod 2 moved axially is installed in described valve body 1, multiple logic oil groove is provided with in described valve body 1, as shown in Figure 3, in described valve body 1, arrangement is provided with seven logic oil grooves, comprise valve body first oil groove 1a, valve body second oil groove 2a, valve body the 3rd oil groove 3a, valve body the 4th oil groove 4a, valve body the 5th oil groove 5a, valve body the 6th oil groove 6a and valve body the 7th oil groove 7a, described valve body first oil groove 1a and described valve body the 5th oil groove 5a bridge joint shape component oil oil duct 11, described valve body the 4th oil groove 4a and described valve body the 7th oil groove 7a bridge joint form public oil return oil duct 10.
As shown in Figure 4, described valve rod 2 is provided with multiple logic oil groove, described valve rod 2 is provided with three logic oil grooves, comprise valve rod first oil groove 1b, valve rod second oil groove 2b and valve rod the 3rd oil groove 3b, valve rod cavity 17 is provided with in described valve rod 2, the outer surface of described valve rod 2 is divided into four shaft shoulders by three on described valve rod 2 described logic oil grooves, and the described shaft shoulder comprises first shaft shoulder 14, second shaft shoulder, the 3rd shaft shoulder 15 and the 4th shaft shoulder 16, the described shaft shoulder is provided with multistage throttling arrangement; Described multistage throttling arrangement first shaft shoulder 14 comprised near described valve rod first oil groove 1b side is provided with 2-4 axially symmetrical radial circular aperture, and as shown in fig. 4 a, described radial circular aperture is communicated with described valve rod cavity 17; 2-4 axial symmetrical radial triangular groove type restriction is independently provided with, as shown in Figure 4 b on the 3rd shaft shoulder 15 of described valve rod second oil groove 2b; 2-4 axial symmetrical radial ring joint restriction is provided with, as illustrated in fig. 4 c on the right side of described radial triangular groove type restriction; 2-4 radial logic groove and 2-4 radial circular aperture is respectively equipped with on the right side of described radial ring joint restriction, as shown in figure 4d, described radial circular aperture is communicated with described valve rod cavity 17, and described logic groove is alternate with described radial circular aperture to be staggered and axially symmetrical; Described ring joint restriction is connected with described logic groove; Described valve rod 2 is provided with 2-4 axial symmetrical triangular groove type restriction near the 3rd shaft shoulder 15 of valve rod the 3rd oil groove 3b, as shown in fig 4e; 2-4 axial symmetrical radial ring joint restriction is independently provided with, as shown in fig. 4f on the 4th shaft shoulder 16 of the 3rd oil groove; 2-4 radial logic groove and 2-4 radial circular aperture is respectively equipped with on the right side of described dovetail groove restriction, as shown in figure 4g, described radial circular aperture is communicated with described valve rod cavity 17, and described logic groove is alternate with described radial circular aperture to be staggered and axially symmetrical.The fundamental diagram of series flow control valve as shown in Figure 5.
In described valve body, on seven logic oil grooves and described valve rod, three logic oil grooves and multistage throttling arrangement have strict logic, multistage throttling governor oil road is formed by these logics, as shown in Figure 1, the valve body 1 of described six five-way electro-hydraulic proportional valves is provided with the first electricity liquid ratio relief valve 8 and the second electricity liquid ratio relief valve 9 be communicated with described throttle grverning oil circuit for pressure release.Described valve body 1 is provided with two filler openings be communicated with described throttle grverning oil circuit, two oil outlets and an oil return inlet T, and described oil outlet comprises the first oil outlet and the second oil outlet P2, and described filler opening comprises the first oil inlet P 1 and the second filler opening; Described valve body second oil groove 2a top has described first oil outlet, described valve body the 5th oil groove 5a top has described second oil outlet P2, described valve body the 3rd oil groove 3a bottom has described first oil inlet P 1, described valve body the 4th oil groove 4a bottom has described oil return inlet T, described valve body the 6th oil groove 6a bottom has described second filler opening, and described valve body the 3rd oil groove 3a and described valve body the 6th oil groove 6a top have the first public oil duct 12 and the second public oil duct 13.The oil input channel of the in described electric-hydraulic proportion valve body 1 first public oil duct 12 and the first electricity liquid ratio relief valve 8 is provided with logical construction, is integrated with the first electricity liquid ratio relief valve 8; The oil input channel of described second public oil duct 13 and the second electricity liquid ratio relief valve 9 is provided with logical construction, is integrated with the second electricity liquid ratio relief valve 9; Described public oil return oil duct 10 is provided with logical construction with the back oil road of electricity liquid ratio relief valve, is integrated with the first electricity liquid ratio relief valve 8 or the second electricity liquid ratio relief valve 9;
As shown in Figure 1, described six five-way electric-hydraulic proportion valve body 1 one end are provided with valve rod 2 control mechanism driving the movement of described valve rod 2, described valve rod 2 control mechanism comprises solenoid-operated proportional pilot valve 5, displacement transducer 6 and piston mechanism 7, and described solenoid-operated proportional pilot valve 5 is arranged on one end of described valve body 1; Described solenoid-operated proportional pilot valve 5 comprises coil, housing, proportion electro-magnet, spool and power transmission spring, described coil is arranged on housing two ends, described proportion electro-magnet is arranged in described coil, the right-hand member of described proportion electro-magnet is provided with power transmission spring, described spool is provided with in described power transmission spring, described spool is arranged in described housing cavity, and the left end of described spool is connected with described proportion electro-magnet.The concrete structure of solenoid-operated proportional pilot valve 5 is not shown in the drawings, and solenoid-operated proportional pilot valve 5 belongs to prior art, repeats no more here.
As shown in Figure 1, described six five-way electric-hydraulic proportion valve body 1 the other ends are provided with valve rod 2 returning device; Described valve rod 2 returning device comprises the bonnet 3 be connected with described six five-way electric-hydraulic proportion valve body 1 one end by bearing pin, Returnning spring 4 and spring seat is provided with in described bonnet 3, described spring is located on spring seat, described spring seat comprises left end spring seat and right-hand member spring seat, described left end spring seat is connected with described valve rod 2, and described right-hand member spring seat is connected with described bonnet 3.
Operating principle of the present invention is:
As shown in figures 6 a and 6b, during the coil no electric circuit of solenoid-operated proportional pilot valve 5, valve rod 2 is in neutral position, now fluid flows into oil return inlet T from the first oil inlet P 1 by the axial symmetrical ring joint restriction of valve body the 3rd oil groove 3a, C position 2-4, the axial symmetrical logic groove in 2-4, D position, valve body the 4th oil groove 4a, and fluid flows back to fuel tank from oil return inlet T; Fluid enters public oil return oil duct 10 from the second oil inlet P 2 by the axial symmetrical logic concentrated flow of valve body the 6th oil groove 6a, valve rod the 3rd oil groove 3b, G position 2-4, and fluid flows back to fuel tank from public oil return oil duct 10 by oil return inlet T; First oil outlet A, the second oil outlet B are not respectively communicated with, and hydraulic system unloads, and executive component is failure to actuate;
As shown in figs. 7 a and 7b, connect solenoid-operated proportional pilot valve 5 coil power, the spool action of solenoid-operated proportional pilot valve 5, under the effect of pressure oil, valve rod 2 moves to left, fluid flows into oil return inlet T from the first oil inlet P 1 by the axial symmetrical logic groove of valve body the 3rd oil groove 3a, D position 2-4, valve body the 4th oil groove 4a, and fluid flows back to fuel tank from oil return inlet T; Fluid flows into the second oil outlet B from the second oil inlet P 2 by the axial symmetrical triangular groove type restriction of valve body the 6th oil groove 6a, valve rod the 3rd oil groove 3b, E position 2-4, valve body the 5th oil groove 5a; When the oil liquid pressure inputted from the second oil inlet P 2 exceeds the numerical value of setting, unnecessary fluid flows back to fuel tank from the second electricity liquid ratio relief valve 9, and the first oil outlet A is not communicated with;
As figures 8 a and 8 b show, solenoid-operated proportional pilot valve 5 coil electricity, under the control of input current, the spool action of solenoid-operated proportional pilot valve 5, move to left at pressure oil effect lower valve rod, fluid flows into the first oil outlet A from the first oil inlet P 1 by the axial symmetrical triangular groove type restriction of valve body the 3rd oil groove 3a, B position 2-4, valve body second oil groove 2a, and when exceeding setting value from the fluid of P1 mouth, fluid flows back to fuel tank from the first electricity liquid ratio relief valve 8, oil return inlet T; Fluid flows into the first oil outlet B from the second oil inlet P 2 by the axial symmetrical ring joint restriction of valve body the 6th oil groove 6a, valve rod the 3rd oil groove 3b, E position 2-4, valve body the 5th oil groove 5a, when exceeding setting value from the fluid of P2 mouth, fluid flows back to fuel tank from the second electricity liquid ratio relief valve 9, oil return inlet T;
As shown in figures 9 a and 9b, valve rod 2 continues to move to left under hydraulic oil effect, and fluid flows into the first oil outlet A from the first oil inlet P 1 by the axial symmetrical ring joint restriction of valve body the 3rd oil groove 3a, C position 2-4, valve body second oil groove 2a; Fluid flows into the second oil outlet B from the first oil-feed P1 by the axial symmetrical valve opening in 2-4, D position, cavity 17, the axial symmetrical valve opening in 2-4, G position, the axial symmetrical triangular groove type restriction of valve body the 6th oil groove 6a, valve rod the 3rd oil groove 3b, E position 2-4, valve body the 5th oil groove 5a; When exceeding setting value from the oil liquid pressure of the first oil inlet P 1, unnecessary fluid flows back to fuel tank from the first electricity liquid ratio relief valve 8 by public oil return oil duct 10, oil return inlet T; Fluid enters the second oil outlet B from the second oil inlet P 2 by the axial symmetrical triangular groove type restriction of valve rod the 3rd oil groove 3a, valve rod the 3rd oil groove 3b, E position 2-4, valve body the 5th oil groove 5a; Fluid enters the first oil outlet A from the second oil inlet P 2 by the axial symmetrical valve opening in 2-4, G position, cavity 17, the axial symmetrical valve opening in 2-4, D position, the axial symmetrical triangular groove type restriction of valve body the 3rd oil groove 3a, B position 2-4, valve body second oil groove 2a; When exceeding setting value from the oil liquid pressure of the second oil inlet P 2, unnecessary fluid flows back to fuel tank from the second electricity liquid ratio relief valve 9 by public oil return oil duct 10, oil return inlet T;
As as-shown-in figures 10 a and 10b, fluid flows into the second oil outlet B from the first oil inlet P 1 by the axial symmetrical valve opening of valve rod the 3rd oil groove 3a, D position 2-4, cavity 17, the axial symmetrical valve opening in 2-4, G position, the axial symmetrical ring joint restriction of valve body the 6th oil groove 6a, F position 2-4, valve rod the 3rd oil groove 3b, valve body the 5th oil groove 5a, flows back to fuel tank from the unnecessary fluid of the first oil inlet P 1 from the first electricity liquid ratio relief valve 8 by public oil return oil duct 10; Second oil inlet P 2 flows into the second oil outlet B by the axial symmetrical ring joint restriction of valve body the 6th oil groove 6a, F position 2-4, valve rod the 3rd oil groove 3b, valve body the 5th oil groove 5a, flows back to fuel tank from the unnecessary fluid of the second oil inlet P 2 from the second electricity liquid ratio relief valve 9 by public oil return oil duct 10; First oil outlet A is not respectively communicated with oil return inlet T;
As shown in Figure 11 a and Figure 11 b, fluid flows into the first oil outlet A from the first oil inlet P 1 by the axial symmetrical ring joint restriction of valve body the 3rd oil groove 3a, C position 2-4, valve body second oil groove 2a, flows back to fuel tank from the unnecessary fluid of hydraulic fluid port P1 by the first electricity liquid ratio relief valve 8 through public oil return oil duct 10; Fluid flows into the first oil outlet A from the second oil inlet P 2 by the axial symmetrical valve opening of valve body the 6th oil groove 6a, G position 2-4, cavity 17, the axial symmetrical valve opening in 2-4, D position, the axial symmetrical ring joint restriction of valve body the 3rd oil groove 3a, C position 2-4, valve rod second oil groove 2b, valve body second oil groove 2a, flows back to fuel tank from the fluid of hydraulic fluid port P2 from the second electricity liquid ratio relief valve 9 through public oil return oil duct 10; Second oil outlet B and oil return inlet T are closed.
Reach the object of hydrovalve speed governing by above-mentioned control, under different throttle grverning states, two electricity liquid ratio relief valves, according to load and restriction Operating condition adjustment pressure itself value, form the two oil circuit flow control circuit of multi-mode.
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode, it is characterized in that: comprise six five-way electro-hydraulic proportional valves, described six five-way electro-hydraulic proportional valves comprise valve body, the valve rod moved axially is installed in described valve body, seven logic oil grooves are provided with in described valve body, described valve rod is provided with three logic oil grooves, described valve rod is provided with multistage throttling arrangement, in described valve body, on seven logic oil grooves and described valve rod, three logic oil grooves and multistage throttling arrangement have strict logic, form multistage throttling governor oil road by these logics;
Described six five-way electric-hydraulic proportion valve body one end are provided with the Electromagnetic Control mechanism driving described valve rod movement, and described six five-way electric-hydraulic proportion valve body the other ends are provided with valve rod returning device; The valve body of described six five-way electro-hydraulic proportional valves is provided with two electricity liquid ratio relief valves for pressure release be communicated with described throttle grverning oil circuit.
2. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 1, it is characterized in that: in described valve body, arrangement is provided with seven logic oil grooves, comprise valve body first oil groove, valve body second oil groove, valve body the 3rd oil groove, valve body the 4th oil groove, valve body the 5th oil groove, valve body the 6th oil groove and valve body the 7th oil groove, described valve body first oil groove and described valve body the 5th oil groove bridge joint shape component oil oil duct, described valve body the 4th oil groove and described valve body the 7th oil groove bridge joint form public oil return oil duct.
3. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 2, it is characterized in that: described valve body second oil groove top has the first oil outlet, described valve body the 5th oil groove top has the second oil outlet, described valve body the 3rd oil groove bottom has the first filler opening, described valve body the 4th oil groove bottom has return opening, described valve body the 6th oil groove bottom has the second filler opening, and described valve body the 3rd oil groove and described valve body the 6th oil groove top have the first public oil duct and the second public oil duct.
4. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 3, is characterized in that: the oil input channel of the in described valve body first public oil duct and a described electricity liquid ratio relief valve is provided with logical construction, is integrated with the first electricity liquid ratio relief valve; Described second public oil duct and the oil input channel of electricity liquid ratio relief valve described in another are provided with logical construction, are integrated with the second electricity liquid ratio relief valve; The back oil road of described public oil return oil duct and two described electricity liquid ratio relief valves is provided with logical construction, is integrated with the first electricity liquid ratio relief valve or the second electricity liquid ratio relief valve.
5. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 1, it is characterized in that: described valve rod is provided with three logic oil grooves, comprise valve rod first oil groove, valve rod second oil groove and valve rod the 3rd oil groove, valve rod cavity is provided with in described valve rod, the outer surface of described valve rod is divided into four shaft shoulders by three described valve rod oil grooves, the described shaft shoulder comprises first shaft shoulder, second shaft shoulder, the 3rd shaft shoulder and the 4th shaft shoulder, and described multistage throttling arrangement is arranged on the described shaft shoulder.
6. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 5, it is characterized in that: described multistage throttling arrangement first shaft shoulder comprised near described valve rod first oil groove side is provided with 2-4 axially symmetrical radial circular aperture, and described radial circular aperture is communicated with described valve rod cavity; 2-4 axial symmetrical radial triangular groove type restriction is independently provided with on the 3rd shaft shoulder of described valve rod second oil groove; 2-4 axial symmetrical radial ring joint restriction is provided with on the right side of described radial triangular groove type restriction; Be respectively equipped with 2-4 radial logic groove and 2-4 radial circular aperture on the right side of described radial ring joint restriction, described radial circular aperture is communicated with described valve rod cavity, and described logic groove is alternate with described radial circular aperture to be staggered and axis is symmetrical; Described ring joint restriction is connected with described logic groove;
Described valve rod is provided with 2-4 axial symmetrical radial triangular groove type restriction near the 3rd shaft shoulder of valve rod the 3rd oil groove; 2-4 axial symmetrical radial ring joint restriction is independently provided with on the 4th shaft shoulder of the 3rd oil groove; Be respectively equipped with 2-4 logic groove and 2-4 radial circular aperture on the right side of described dovetail groove restriction, described radial circular aperture is communicated with described valve rod cavity, and described logic groove is alternate with described radial circular aperture to be staggered and axis is symmetrical.
7. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 1, is characterized in that: described Electromagnetic Control mechanism comprises solenoid-operated proportional pilot valve, displacement transducer and piston mechanism, and described solenoid-operated proportional pilot valve is arranged on one end of described valve body.
8. the two oil circuit electric-hydraulic proportion overflowing and speed valve of multi-mode as claimed in claim 7, it is characterized in that: described solenoid-operated proportional pilot valve comprises coil, housing, proportion electro-magnet, spool and power transmission spring, described coil is arranged on housing two ends, described proportion electro-magnet is arranged in described coil, the right-hand member of described proportion electro-magnet is provided with power transmission spring, described spool is provided with in described power transmission spring, described spool is arranged in described housing cavity, and the left end of described spool is connected with described proportion electro-magnet.
9. the two oil circuit electric-hydraulic proportion overflowing and speed valve of the multi-mode as described in claim as arbitrary in claim 1 to 8, it is characterized in that: described valve rod returning device comprises the bonnet be connected with described six five-way electric-hydraulic proportion valve body one end by bearing pin, Returnning spring and spring seat is provided with in described bonnet, described spring is located on spring seat, described spring seat comprises left end spring seat and right-hand member spring seat, described left end spring seat is connected with described valve rod, and described right-hand member spring seat is connected with described bonnet.
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| CN201510939408.XA CN105370655B (en) | 2015-12-16 | 2015-12-16 | The double oil circuit electric-hydraulic proportion overflowing and speed valves of multi-mode |
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