CN102562701A - Easily controlling hydraulic corner self-servo valve - Google Patents
Easily controlling hydraulic corner self-servo valve Download PDFInfo
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- CN102562701A CN102562701A CN2012100330816A CN201210033081A CN102562701A CN 102562701 A CN102562701 A CN 102562701A CN 2012100330816 A CN2012100330816 A CN 2012100330816A CN 201210033081 A CN201210033081 A CN 201210033081A CN 102562701 A CN102562701 A CN 102562701A
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Abstract
The invention relates to an easily controlling hydraulic corner self-servo valve which is characterized in that a blade (15) is arranged on the outer wall of a hollow column body (35) of a valve body (7); the initial assembly position of the blade (15) is in axis symmetric arrangement with that of a fixed baffle block (5); a valve sleeve (8) is arranged in a the hollow column body (35), and a valve core (8) is arranged in a small hollow circle (34) of the valve body (7); a high pressure oil inlet P and a low pressure oil outlet T of a left end cover (1) are respectively communicated with high and low pressure outer oil annular slots (31 and 28) of the valve body (7) correspondingly through high and low pressure oil channels (2 and 17) of a cylinder body (6); high and low pressure inner oil annular slots (32 and 30) of the valve body (7) are correspondingly communicated with core body high and low pressure oil annular slots (39 and 40) of the valve core (9); and core body high and low pressure oil channels (38 and 41) enter a first working chamber and a and second working chamber correspondingly through upper and lower semi-circle oil annular slots (36 and 37) of the valve sleeve (8). According to the invention, the easily controlling hydraulic corner self-servo valve has the characteristics that the preparation is convenient, the radial force and the axial force subjected by the valve core are both balanced, the resistance of the valve core is low, the dynamic characteristics are good, and the servo blind area is small.
Description
Technical field
The invention belongs to the technical field of servovalve, be specifically related to a kind of easy control hydraulic pressure corner from servovalve.
Background technique
The hydraulic pressure corner is the core parts of hydraulic control system from servovalve, in industry, has widely to use, and it can be converted into the small-power of motor input the high-power of hydraulic pressure output, so that equipment is carried out the accurate corner control of big moment.
At present, the servo theory of hydraulic pressure corner (Zhu Xinglong, Yan Jingping have been utilized first in the hydraulic servo joint of the researchs such as scholar Zhu Xinglong of domestic Yangzhou University; Zhou Jiping, Miu Handong, Dan Yicai. degrees of freedom hydraulic servo joint Dynamic Modeling and simulation study. Machine Design and manufacturing technology; 2002,31 (6): 23-25.), (Zhu Xinglong, Zhou Jiping. a kind of hydraulic servo stability of joint and analysis of steady-state error thereof. Control Engineering; 2006; 13 (1): 87-90.), for hydraulic servomechanism built-in with reduce hydraulic knuckle size aspect and done useful exploration, obtained certain achievement.But owing to have only a pair of hydraulic fluid port on the rotary spool in above-mentioned hydraulic servo joint; Because of reasons in structure makes its spool force in radial uneven, spool has an end to be prone to form dead space simultaneously, when the operating time is longer; Leak oil and can produce larger axis to power to spool because of flowing out; So hydraulic card clamping force and frictional force that spool receives are all bigger, the spool dynamic property degenerates, and servo blind area is bigger.
To spool radial force imbalance problem, the scholar Jiang Lin of Wuhan University Of Technology etc. has designed servovalve structure (Jiang Lin, the Chen Xinyuan of a kind of P mouth and the paired perpendicular quadrature distribution of T mouth; Zhao Hui; Ceng Liangcai, Jin Xiaohong thanks and attains. based on the servo hydraulic knuckle research of hydraulic pressure corner. and electromechanical engineering; 2011,28 (3): 265-268+309.).This valve core of servo valve balanced radial force, spool resistance reduce to some extent; But also exist spool to have an end to be prone to form the problem of dead space simultaneously; When the operating time is longer; Can't flow out and can produce larger axis to power to spool because of leaking oil, the spool dynamic property is not very desirable, and servo blind area improves to some extent but be also undesirable; The paired perpendicular quadrature of P mouth and T mouth distributes and has solved spool radial force imbalance problem, but has brought the dark oil duct of valve inner to be difficult to prepare, to be difficult to difficult problems such as processing simultaneously.
Summary of the invention
The present invention is intended to overcome the prior art defective, and purpose provides a kind of preparation, low, spool of cost be convenient to
The equal balance of radial and axial power, the spool resistance is little, dynamic property good and servo blind area is little easy control hydraulic pressure corner are from servovalve.
For realizing above-mentioned purpose, the technological scheme that the present invention adopts is: the hydraulic pressure corner comprises fixed stop, cylinder body, valve body, valve pocket, spool and blade from servovalve.
The left end of cylinder body is equipped with left end cap, is provided with dividing plate in the cylinder body near left end, and the inwall on the positive top of cylinder body on dividing plate right side is equipped with fixed stop, and fixed stop and valve body are equipped with the block Stamping Steel Ribbon for movingly between fixed stop and valve body; The outer wall of the positive bottom of hollow cylinder of valve body fixedly is equipped with blade, and blade and cylinder body are equipped with the runner sealing bar for movingly between blade and cylinder body; The initial rigging position of blade and fixed stop is the axle center symmetric arrangement, and blade and fixed stop are positioned at the vertical guide of axis;
The right-hand member of cylinder body is equipped with right end cap; The shaft shoulder at valve body middle part is equipped with bearing; Be installed in the cylinder body, the output shaft of valve body stretches out right end cap the valve body coaxial line, and the output shaft end of valve body is equipped with flange plate; Be provided with the end bracket enclosed circle between the output shaft of right end cap and valve body, sealing cover and flange plate are fixedly connected.
The left side of valve body is fixed with the annular seal piece; Be fixedly mounted in the hollow cylinder of valve body the valve pocket coaxial line; One end of spool is installed in the little open circles of valve body with passing the valve pocket coaxial line; Motor is fixed on the dividing plate concentrically, and the endoporus of the output shaft of motor and spool left end passes through key connecting.
The above and below at left end cap center is corresponding is provided with high pressure oil import P and low pressure oil outlet T, and high pressure oil import P and low pressure oil export the high-pressure oil duct of the oil duct of T through separately and cylinder body and the low pressure oil duct is corresponding communicates; The center position of left end cap is provided with drain tap, and said drain tap communicates with the cylinder body draining road of cylinder body through the draining road of left end cap.
The upper and lower correspondence of the cylinder wall of cylinder body is provided with high-pressure oil duct and low pressure oil duct; T is corresponding communicates for the high pressure oil import P of the outlet of the inlet of high-pressure oil duct and low pressure oil duct and left end cap and low pressure oil outlet, the inlet of the outlet of high-pressure oil duct and low pressure oil duct and the high pressure of valve body outward oil ring groove and low pressure oil ring groove is corresponding outward communicates; In the cylinder wall of cylinder body, be provided with cylinder body draining road, the left port in cylinder body draining road communicates with left end cap draining road, and the right output port in cylinder body draining road communicates with right end cap draining road, and right end cap draining road communicates with valve body draining road.
Oil ring groove communicates through the low pressure radial direction oil hole with the outer oil ring groove of low pressure in the low pressure of valve body; Oil ring groove communicates through the high-pressure radial oilhole with the outer oil ring groove of high pressure in the high pressure of valve body, the core body high pressure oil annular groove and corresponding the communicating of core body low pressure oil annular groove of the interior oil ring groove of oil ring groove and low pressure and spool in the high pressure of valve body; The core body high pressure oil annular groove of spool communicates with the core body high-pressure oil duct; The core body low pressure oil annular groove of spool communicates with core body low pressure oil duct; Corresponding the communicating of lower semi-circle oil ring groove of core body high-pressure oil duct and core body low pressure oil duct and the upper semi-circle oil ring groove and the valve pocket of valve pocket; Or corresponding the communicating of upper semi-circle oil ring groove of core body high-pressure oil duct and core body low pressure oil duct and the lower semi-circle oil ring groove and the valve pocket of valve pocket, the upper semi-circle oil ring groove of valve pocket and lower semi-circle oil ring groove communicate with corresponding first active chamber and second active chamber.
The left end of valve body is a hollow cylinder, and hollow cylinder inner diameter is identical with the nominal size of valve pocket external diameter, is provided with 2 ~ 5 oilholes equably on two plain lines of hollow cylinder, and two plain lines are symmetrically located at the both sides of hollow cylinder center vertical guide.
The middle part of valve body is a cylindrical body; Said cylindrical body external diameter is identical with the nominal size of cylinder diameter; Said cylindrical external cylindrical surface has 3 valve seal grooves; Have the outer oil ring groove of low pressure between the first valve seal groove from left to right and the second valve seal groove, have the outer oil ring groove of high pressure between the second valve seal groove and the 3rd valve seal groove; In said cylindrical body, be provided with little open circles coaxial line; The open circles of hollow cylinder communicates with little open circles; Little open circles internal diameter is identical with the nominal size of spool external diameter, and the inwall of little open circles from left to right has oil ring groove and the interior oil ring groove of high pressure in the low pressure successively; Said cylindrical right side is provided with the shaft shoulder, and the right side of the shaft shoulder is an output shaft, and the end face of output shaft has high pressure oil outlet and low pressure oil import, the high pressure oil of output shaft export and the low pressure oil import with the high-pressure radial oilhole with the low pressure radial direction oil hole is corresponding communicates; The place, axle center of output shaft is provided with valve body draining road, and an end in valve body draining road communicates with the end face of output shaft, and the other end communicates with little open circles.
Said spool left end coaxial line be provided with the endoporus that connects with motor output shaft; On 4 plain lines of spool cylndrical surface, have 2 ~ 5 valve ports equably; Valve port on every plain line communicates through oil duct; Article 4, plain line evenly distributes, and 2 ~ 5 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section, and 4 valve ports of this cross section distribute by P mouth-T mouth-P mouth-T mouth successively.The right-hand member of spool has 3 core body seal grooves, has core body high pressure oil annular groove between the first core body seal groove from right to left and the second core body seal groove, has core body low pressure oil annular groove between the second core body seal groove and the 3rd core body seal groove.
The inwall of said valve pocket is provided with 4 shoulders equably; Each shoulder is approximate cuboid; Equal and the parallel axes of the length direction of each shoulder, the end face that extends radially out end of each shoulder is an arc surface, the radius of said arc surface is identical with the nominal size of the cylinder radius of spool.The cylndrical surface of valve pocket is provided with 2 ~ 5 upper semi-circle oil ring grooves and 2 ~ 5 lower semi-circle oil ring grooves equably along axis, and upper semi-circle oil ring groove and lower semi-circle oil ring groove all are semicircle shape, and the two ends of semicircle are equipped with through hole, is arranged between upper semi-circle oil ring groove and lower semi-circle oil ring groove; Each upper semi-circle oil ring groove projection on cross section is identical; Each lower semi-circle oil ring groove projection on cross section is identical, and the projection of line on cross section at the line at the through hole center at upper semi-circle oil ring groove two ends and the through hole center at lower semi-circle oil ring groove two ends is vertical each other.4 shoulders of valve pocket and spool form four oil pockets, are respectively first oil pocket, second oil pocket, the 3rd oil pocket and the 4th oil pocket; Wherein, first oil pocket and the 3rd oil pocket communicate through the lower semi-circle oil ring groove, and second oil pocket and the 4th oil pocket communicate through the upper semi-circle oil ring groove.
Said fixed stop is a strip; The equal in length of the hollow cylinder of the length of fixed stop and valve body left end; The lower camber side center of fixed stop is provided with strip block seal groove along axial direction; Strip block seal groove and fixed stop equal in length, strip block seal groove is embedded with the block Stamping Steel Ribbon.
Said blade is a strip; The equal in length of the length of blade and the hollow cylinder of valve body; The lower camber side center of blade is provided with strip runner sealing groove along axial direction, and strip runner sealing groove equates that with length of blade strip runner sealing groove is embedded with the runner sealing bar.
High pressure oil import P of the present invention gets into the high-pressure oil duct of cylinder body through its oil duct; Oil ring groove outside the outlet of cylinder body mesohigh oil duct gets into the high pressure of valve body; Get into the interior oil ring groove of high pressure of valve body again through the high-pressure radial oilhole; Get into the core body high pressure oil annular groove of spool then, then get into the core body high-pressure oil duct and arrive valve pocket.
If when spool was rotated counterclockwise with respect to valve pocket, high pressure oil got into first active chamber through the upper semi-circle oil ring groove, promote blade and be rotated counterclockwise, make valve body follow valve core movement, the low pressure oil of second active chamber gets into valve pocket through the lower semi-circle oil ring groove.
If when spool turned clockwise with respect to valve pocket, high pressure oil got into second active chamber through the lower semi-circle oil ring groove, promote blade and turn clockwise, make valve body follow valve core movement, the low pressure oil of first active chamber gets into valve pocket through the upper semi-circle oil ring groove.
Low pressure oil return in the valve pocket gets into core body low pressure oil duct; Get into the interior oil ring groove of low pressure of valve body through core body low pressure oil annular groove; Get into the outer oil ring groove of low pressure of valve body again through the low pressure radial direction oil hole of valve body; Pass through the inlet of cylinder body mesolow oil duct again, get into low pressure oil outlet T through the outlet of low pressure oil road and progressively reflux.
Because adopt technique scheme, compared with present technology the present invention has following good effect:
1) 4 plain lines on the spool of the present invention evenly distribute, and 2 ~ 5 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section, and 4 valve ports of this cross section distribute by P mouth-T mouth-P mouth-T mouth successively, and the paired perpendicular quadrature of P mouth and T mouth distributes; When spool was rotated counterclockwise with respect to valve body, the P mouth communicated with first active chamber, and the power that high pressure oil acts on the spool is all pointed to the axle center, the opposite sign but equal magnitude of these power; In like manner, when spool turned clockwise with respect to valve body, the P mouth communicated with second active chamber, and the power that high pressure oil acts on the spool is also pointed to the axle center, and these power are opposite sign but equal magnitude also; An end that between spool and valve body, forms dead space easily is provided with valve body draining road, makes the suffered axial force balance of spool; Because spool force in radial and axial force be each self balancing all,, be easy to control so suffered resistance and hydraulic card clamping force are all very little, dynamic property is good;
2) because equal each self balancing of spool force in radial and axial force, the valve port distortion is little, the quality of fit height, and spool valve port and shoulder lap are little in this valve body, near zero lap, so servo blind area of the present invention is little;
3) the present invention is divided into two parts with valve body, has increased a valve pocket, links up paired P mouth and T mouth with valve pocket; A plurality of part separate machined are convenient to preparation, and need accurately machined have only spool and valve pocket, and processing cost obviously reduces, so preparation is convenient in the present invention, cost is lower.
Therefore, the present invention have be convenient to prepare, spool force in radial and axial force all each self balancing, the spool resistance is little, dynamic property good, servo blind area is little and the characteristics that are easy to control.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is the B-B cross-sectional view of Fig. 1;
Fig. 4 is the cross-sectional view of valve body 7 among Fig. 1;
Fig. 5 is the semi-section structural representation of valve pocket 8 among Fig. 1;
Fig. 6 is the cross-sectional view of spool 9 among Fig. 1;
Fig. 7 is the C-C cross-sectional view of Fig. 6;
Fig. 8 is the D-D cross-sectional view of Fig. 6.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention being described further, is not the restriction to its protection domain.
Embodiment 1
A kind of easy control hydraulic pressure corner is from servovalve, and as depicted in figs. 1 and 2, this hydraulic pressure corner comprises fixed stop 5, cylinder body 6, valve body 7, valve pocket 8, spool 9 and blade 15 from servovalve.
The left end of cylinder body 6 is equipped with left end cap 1, is provided with dividing plate 16 in the cylinder body 6 near left end, and the inwall on the cylinder body 6 positive tops on dividing plate 16 right sides is equipped with fixed stop 5, and fixed stop 5 and valve body 7 are for movingly, and 7 of fixed stop 5 and valve bodies are equipped with the block Stamping Steel Ribbon; The outer wall of the hollow cylinder 35 positive bottoms of valve body 7 fixedly is equipped with blade 15, and blade 15 and cylinder body 6 are for movingly, and 6 of blade 15 and cylinder bodies are equipped with runner sealing bar 25; Blade 15 is the axle center symmetric arrangement with the initial rigging position of fixed stop 5, and blade 15 and fixed stop 5 are positioned at the vertical guide of axis.
The right-hand member of cylinder body 6 is equipped with right end cap 11; The shaft shoulder at valve body 7 middle parts is equipped with bearing 10; Be installed in the cylinder body 6, the output shaft of valve body 7 stretches out right end cap 11 valve body 7 coaxial lines, and the output shaft end of valve body 7 is equipped with flange plate 12; Be provided with the end bracket enclosed circle between the output shaft of right end cap 11 and valve body 7, sealing cover 13 is fixedly connected with flange plate 12.
The left side of valve body 7 is fixed with annular seal piece 4; Be fixedly mounted in the hollow cylinder 35 of valve body 7 valve pocket 8 coaxial lines; One end of spool 9 is installed in the little open circles 34 of valve body 7 with passing valve pocket 8 coaxial lines; Motor 3 is fixed on the dividing plate 16 concentrically, and the endoporus of the output shaft of motor 3 and spool 9 left ends passes through key connecting.
The above and below at left end cap 1 center is corresponding is provided with high pressure oil import P and low pressure oil outlet T, and high pressure oil import P and low pressure oil export the oil duct of T through separately and the high-pressure oil duct 2 and low pressure oil duct 17 corresponding the communicating of cylinder body 6; The center position of left end cap 1 is provided with drain tap, and said drain tap communicates with the cylinder body draining road 18 of cylinder body 6 through the draining road of left end cap 1.
The upper and lower correspondence of the cylinder wall of cylinder body 6 is provided with high-pressure oil duct 2 and low pressure oil duct 17; T is corresponding communicates for the high pressure oil import P of the outlet of the inlet of high-pressure oil duct 2 and low pressure oil duct 17 and left end cap 1 and low pressure oil outlet, and the inlet of the outlet of high-pressure oil duct 2 and low pressure oil duct 17 and the outer oil ring groove 31 of the high pressure of valve body 7 and low pressure is oil ring groove 28 corresponding communicating outward; In the cylinder wall of cylinder body 6, be provided with cylinder body draining road 18, the left port in cylinder body draining road 18 communicates with left end cap draining road, and the right output port in cylinder body draining road 18 communicates with right end cap draining road 19, and right end cap draining road 19 communicates with valve body draining road 14.
As shown in Figure 4; Oil ring groove 30 communicates through low pressure radial direction oil hole 29 with the outer oil ring groove 28 of low pressure in the low pressure of valve body 7; Oil ring groove 32 communicates through high-pressure radial oilhole 33 with the outer oil ring groove 31 of high pressure in the high pressure of valve body 7, oil ring groove 32 and the core body high pressure oil annular groove 39 and core body low pressure oil annular groove 40 corresponding communicate of the interior oil ring groove 30 of low pressure with spool 9 in the high pressure of valve body 7; The core body high pressure oil annular groove 39 of spool 9 communicates with core body high-pressure oil duct 38; The core body low pressure oil annular groove 40 of spool 9 communicates with core body low pressure oil duct 41; Core body high-pressure oil duct 38 and lower semi-circle oil ring groove 37 corresponding communicate of core body low pressure oil duct 41 with the upper semi-circle oil ring groove 36 and the valve pocket 8 of valve pocket 8; Or core body high-pressure oil duct 38 and upper semi-circle oil ring groove 36 corresponding communicate of core body low pressure oil duct 41 with the lower semi-circle oil ring groove 37 and the valve pocket 8 of valve pocket 8, the upper semi-circle oil ring groove 36 and the lower semi-circle oil ring groove 37 of valve pocket 8 communicate with corresponding first active chamber 21 and second active chamber 22.
As shown in Figure 4; The left end of valve body 7 is a hollow cylinder 35; Hollow cylinder 35 internal diameters are identical with the nominal size of valve pocket 8 external diameters, are provided with 2 ~ 5 oilholes equably on two plain lines of hollow cylinder 35, and two plain lines are symmetrically located at the both sides of hollow cylinder 35 center vertical guides.
As shown in Figure 4; The middle part of valve body 7 is a cylindrical body; Said cylindrical body external diameter is identical with the nominal size of cylinder body 6 internal diameters; Said cylindrical external cylindrical surface has 3 valve seal grooves, has between the first valve seal groove from left to right and the second valve seal groove and has the outer oil ring groove 31 of high pressure between outer oil ring groove 28, the second valve seal grooves of low pressure and the 3rd valve seal groove; In said cylindrical body, be provided with little open circles 34 coaxial line; The open circles of hollow cylinder 35 communicates with little open circles 34; Little open circles 34 internal diameters are identical with the nominal size of spool 9 external diameters, and the inwall of little open circles 34 from left to right has oil ring groove 30 and the interior oil ring groove 32 of high pressure in the low pressure successively; Said cylindrical right side is provided with the shaft shoulder, and the right side of the shaft shoulder is an output shaft, and the end face of output shaft has high pressure oil outlet and low pressure oil import, the high pressure oil outlet of output shaft and low pressure oil import and high-pressure radial oilhole 33 and low pressure radial direction oil hole 29 corresponding communicating; The place, axle center of output shaft is provided with valve body draining road 14, and an end in valve body draining road 14 communicates with the end face of output shaft, and the other end communicates with little open circles 34.
Like Fig. 6, Fig. 7 and shown in Figure 8; Spool 9 left end coaxial lines be provided with the endoporus that connects with motor 3 output shafts; On 4 plain lines of spool 9 cylndrical surface, have 3 valve ports equably, the valve port on every plain line communicates through oil duct, and 4 plain lines evenly distribute; 3 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section, and 4 valve ports of this cross section distribute by P mouth-T mouth-P mouth-T mouth successively.The right-hand member of spool 9 has 3 core body seal grooves, has between the first core body seal groove from right to left and the second core body seal groove between core body high pressure oil annular groove 39, the second core body seal grooves and the 3rd core body seal groove and has core body low pressure oil annular groove 40.
Like Fig. 3 and shown in Figure 5; The inwall of valve pocket 8 is provided with 4 shoulders 27 equably; Each shoulder 27 is approximate cuboid; Equal and the parallel axes of the length direction of each shoulder 27, the end face that extends radially out end of each shoulder 27 is an arc surface, the radius of said arc surface is identical with the nominal size of the cylinder radius of spool 9.The cylndrical surface of valve pocket 8 is provided with 3 upper semi-circle oil ring grooves 36 and 3 lower semi-circle oil ring grooves 37 equably along axis; Upper semi-circle oil ring groove 36 all is semicircle shape with lower semi-circle oil ring groove 37; The two ends of semicircle are equipped with through hole, and 37 of upper semi-circle oil ring groove 36 and lower semi-circle oil ring grooves are arranged; Each upper semi-circle oil ring groove 36 projection on cross section is identical; Each lower semi-circle oil ring groove 37 projection on cross section is identical, and the projection of line on cross section at the line at the through hole center at upper semi-circle oil ring groove 36 two ends and the through hole center at lower semi-circle oil ring groove 37 two ends is vertical each other.
4 shoulders 27 of valve pocket 8 form four oil pockets with spool 9, are respectively first oil pocket 20, second oil pocket 23, the 3rd oil pocket 24 and the 4th oil pocket 26; Wherein, first oil pocket 20 and the 3rd oil pocket 24 communicate through lower semi-circle oil ring groove 37, and second oil pocket 23 and the 4th oil pocket 26 communicate through upper semi-circle oil ring groove 36.
As shown in figures 1 and 3; Fixed stop 5 is a strip; The equal in length of the hollow cylinder 35 of the length of fixed stop 5 and valve body 7 left ends; The lower camber side center of fixed stop 5 is provided with strip block seal groove along axial direction, strip block seal groove and fixed stop 5 equal in length, and strip block seal groove is embedded with the block Stamping Steel Ribbon.
As shown in figures 1 and 3; Blade 15 is a strip; The equal in length of the hollow cylinder 35 of the length of blade 15 and valve body 7; The lower camber side center of blade 15 is provided with strip runner sealing groove along axial direction, strip runner sealing groove and blade 15 equal in length, and strip runner sealing groove is embedded with runner sealing bar 25.
Embodiment 2
A kind of easy control hydraulic pressure corner is from servovalve.Except that following technical parameter, all the other are with embodiment 1.
On 4 plain lines of spool 9 cylndrical surface, have 2 valve ports equably, the valve port on every plain line communicates through oil duct, and 4 plain lines evenly distribute, and 2 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section;
The cylndrical surface of valve pocket 8 is provided with 2 upper semi-circle oil ring grooves 36 and 2 lower semi-circle oil ring grooves 37 equably along axis.
Embodiment 3
A kind of easy control hydraulic pressure corner is from servovalve.Except that following technical parameter, all the other are with embodiment 1.
On 4 plain lines of spool 9 cylndrical surface, have 4 ~ 5 valve ports equably, the valve port on every plain line communicates through oil duct, and 4 plain lines evenly distribute, and 4 ~ 5 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section;
The cylndrical surface of valve pocket 8 is provided with 4 ~ 5 upper semi-circle oil ring grooves 36 and 4 ~ 5 lower semi-circle oil ring grooves 37 equably along axis.
The high pressure oil import P of this embodiment gets into the high-pressure oil duct 2 of cylinder body 6 through its oil duct; Oil ring groove 31 outside the outlet of cylinder body 6 mesohigh oil ducts 2 gets into the high pressure of valve body 7; Get into the interior oil ring groove 32 of high pressure of valve body 7 again through high-pressure radial oilhole 33; Get into the core body high pressure oil annular groove 39 of spool 9 then, then get into core body high-pressure oil duct 38 and arrive valve pocket 8.
When if spool 9 is rotated counterclockwise with respect to valve pocket 8; High pressure oil gets into first active chamber 21 through upper semi-circle oil ring groove 36; Promote blade 15 and be rotated counterclockwise, make valve body 7 follow spool 9 motions, the low pressure oil of second active chamber 22 gets into valve pocket 8 through lower semi-circle oil ring groove 37;
When if spool 9 turns clockwise with respect to valve pocket 8; High pressure oil gets into second active chamber 22 through lower semi-circle oil ring groove 37; Promote blade 15 and turn clockwise, make valve body 7 follow spool 9 motions, the low pressure oil of first active chamber 21 gets into valve pocket 8 through upper semi-circle oil ring groove 36;
Low pressure oil return in the valve pocket 8 gets into core body low pressure oil duct 41; Get into the interior oil ring groove 30 of low pressure of valve body 7 through core body low pressure oil annular groove 40; Get into the outer oil ring groove 28 of low pressure of valve body 7 again through the low pressure radial direction oil hole 29 of valve body 7; Pass through the inlet of cylinder body 6 mesolow oil ducts 17 again, get into low pressure oil outlet T through 17 outlets of low pressure oil duct and progressively reflux.
Compared with present technology this embodiment has following good effect:
4 plain lines on the spool 9 of 1 embodiment evenly distribute; 2 ~ 5 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section; 4 valve ports of this cross section distribute by P mouth-T mouth-P mouth-T mouth successively, and the paired perpendicular quadrature of P mouth and T mouth distributes; When spool 9 was rotated counterclockwise with respect to valve body 7, the P mouth communicated with first active chamber 21, and the power that high pressure oil acts on the spool 9 is all pointed to the axle center, the opposite sign but equal magnitude of these power; In like manner, when spool 9 turned clockwise with respect to valve body 7, the P mouth communicated with second active chamber 22, and the power that high pressure oil acts on the spool 9 is also pointed to the axle center, and these power are opposite sign but equal magnitude also; Be provided with valve body draining road 14 at spool 9 and 7 ends that form dead space easily of valve body, make spool 9 suffered axial force balances; Because spool 9 force in radial and axial force be each self balancing all,, be easy to control so suffered resistance and hydraulic card clamping force are all very little, dynamic property is good;
2 because equal each self balancing of spool 9 force in radial and axial force, and the valve port distortion is little, the quality of fit height, and spool valve port and shoulder lap are little in this valve body, near zero lap, so the servo blind area of this embodiment is little;
3 embodiments are divided into two parts with valve body 7, have increased a valve pocket 8, link up paired P mouth and T mouth with valve pocket 8; A plurality of part separate machined are convenient to preparation, and need accurately machined have only spool 9 and valve pocket 8, and processing cost obviously reduces, so this embodiment is convenient to preparation and cost is lower.
Therefore, this embodiment have be convenient to prepare, spool force in radial and axial force all each self balancing, the spool resistance is little, dynamic property good, servo blind area is little and the characteristics that are easy to control.
Claims (6)
1. one kind is prone to control hydraulic pressure corner from servovalve, it is characterized in that said hydraulic pressure corner comprises fixed stop (5), cylinder body (6), valve body (7), valve pocket (8), spool (9) and blade (15) from servovalve;
The left end of cylinder body (6) is equipped with left end cap (1); Be provided with dividing plate (16) in the cylinder body (6) near left end; The inwall on the positive top of the cylinder body (6) on dividing plate (16) right side is equipped with fixed stop (5), and fixed stop (5) and valve body (7) are equipped with the block Stamping Steel Ribbon for movingly between fixed stop (5) and valve body (7); The outer wall of the positive bottom of the hollow cylinder (35) of valve body (7) fixedly is equipped with blade (15), and blade (15) and cylinder body (6) are equipped with runner sealing bar (25) for movingly between blade (15) and cylinder body (6); Blade (15) is the axle center symmetric arrangement with the initial rigging position of fixed stop (5), and blade (15) and fixed stop (5) are positioned at the vertical guide of axis;
The right-hand member of cylinder body (6) is equipped with right end cap (11); The shaft shoulder at valve body (7) middle part is equipped with bearing (10); Be installed in the cylinder body (6), the output shaft of valve body (7) stretches out right end cap (11) valve body (7) coaxial line, and the output shaft end of valve body (7) is equipped with flange plate (12); Be provided with the end bracket enclosed circle between the output shaft of right end cap (11) and valve body (7), sealing cover (13) is fixedly connected with flange plate (12);
The left side of valve body (7) is fixed with annular seal piece (4); Be fixedly mounted in the hollow cylinder (35) of valve body (7) valve pocket (8) coaxial line; One end of spool (9) is installed in the little open circles (34) of valve body (7) with passing valve pocket (8) coaxial line; Motor (3) is fixed on the dividing plate (16) concentrically, and the endoporus of the output shaft of motor (3) and spool (9) left end passes through key connecting;
The above and below at left end cap (1) center is corresponding is provided with high pressure oil import P and low pressure oil outlet T, and high pressure oil import P and low pressure oil export the oil duct of T through separately and the high-pressure oil duct (2) and corresponding the communicating of low pressure oil duct (17) of cylinder body (6); The center position of left end cap (1) is provided with drain tap, and said drain tap communicates with the cylinder body draining road (18) of cylinder body (6) through the draining road of left end cap (1);
The upper and lower correspondence of the cylinder wall of cylinder body (6) is provided with high-pressure oil duct (2) and low pressure oil duct (17); T is corresponding communicates for the high pressure oil import P of the outlet of the inlet of high-pressure oil duct (2) and low pressure oil duct (17) and left end cap (1) and low pressure oil outlet, and the inlet of the outlet of high-pressure oil duct (2) and low pressure oil duct (17) and the high pressure of valve body (7) be oil ring groove (31) and low pressure corresponding the communicating of oil ring groove (28) outward outward; In the cylinder wall of cylinder body (6), be provided with cylinder body draining road (18); The left port in cylinder body draining road (18) communicates with left end cap draining road; The right output port in cylinder body draining road (18) communicates with right end cap draining road (19), and right end cap draining road (19) communicates with valve body draining road (14);
Oil ring groove (30) communicates through low pressure radial direction oil hole (29) with the outer oil ring groove (28) of low pressure in the low pressure of valve body (7); Oil ring groove (32) communicates through high-pressure radial oilhole (33) with the outer oil ring groove (31) of high pressure in the high pressure of valve body (7), the core body high pressure oil annular groove (39) and corresponding the communicating of core body low pressure oil annular groove (40) of interior oil ring groove (32) of the high pressure of valve body (7) and the interior oil ring groove (30) of low pressure and spool (9); The core body high pressure oil annular groove (39) of spool (9) communicates with core body high-pressure oil duct (38); The core body low pressure oil annular groove (40) of spool (9) communicates with core body low pressure oil duct (41); Corresponding the communicating of lower semi-circle oil ring groove (37) of core body high-pressure oil duct (38) and core body low pressure oil duct (41) and the upper semi-circle oil ring groove (36) and the valve pocket (8) of valve pocket (8); Or corresponding the communicating of upper semi-circle oil ring groove (36) of core body high-pressure oil duct (38) and core body low pressure oil duct (41) and the lower semi-circle oil ring groove (37) and the valve pocket (8) of valve pocket (8), the upper semi-circle oil ring groove (36) of valve pocket (8) and lower semi-circle oil ring groove (37) communicate with corresponding first active chamber (21) and second active chamber (22).
2. easy control hydraulic pressure corner according to claim 1 is from servovalve; The left end that it is characterized in that said valve body (7) is hollow cylinder (35); Hollow cylinder (35) internal diameter is identical with the nominal size of valve pocket (8) external diameter; Be provided with 2 ~ 5 oilholes equably on two plain lines of hollow cylinder (35), two plain lines are symmetrically located at the both sides of hollow cylinder (35) center vertical guide;
The middle part of said valve body (7) is a cylindrical body; Said cylindrical body external diameter is identical with the nominal size of cylinder body (6) internal diameter; Said cylindrical external cylindrical surface has 3 valve seal grooves; Have the outer oil ring groove (28) of low pressure between the first valve seal groove from left to right and the second valve seal groove, have the outer oil ring groove (31) of high pressure between the second valve seal groove and the 3rd valve seal groove; In said cylindrical body, be provided with little open circles (34) coaxial line; The open circles of hollow cylinder (35) communicates with little open circles (34); Little open circles (34) internal diameter is identical with the nominal size of spool (9) external diameter, and the inwall of little open circles (34) from left to right has oil ring groove (30) and the interior oil ring groove (32) of high pressure in the low pressure successively; Said cylindrical right side is provided with the shaft shoulder; The right side of the shaft shoulder is an output shaft; The end face of output shaft has high pressure oil outlet and low pressure oil import, high pressure oil outlet and the low pressure oil import and high-pressure radial oilhole (33) and corresponding the communicating of low pressure radial direction oil hole (29) of output shaft; The place, axle center of output shaft is provided with valve body draining road (14), and an end in valve body draining road (14) communicates with the end face of output shaft, and the other end communicates with little open circles (34).
3. easy control hydraulic pressure corner according to claim 1 is from servovalve; The endoporus that connects with motor (3) output shaft that is provided with that it is characterized in that said spool (9) left end coaxial line; On 4 plain lines of spool (9) cylndrical surface, have 2 ~ 5 valve ports equably, the valve port on every plain line communicates through oil duct, and 4 plain lines evenly distribute; 2 ~ 5 valve ports valve port corresponding with all the other plain lines on every plain line is positioned at same cross section, and 4 valve ports of this cross section distribute by P mouth-T mouth-P mouth-T mouth successively;
The right-hand member of spool (9) has 3 core body seal grooves, has core body high pressure oil annular groove (39) between the first core body seal groove from right to left and the second core body seal groove, has core body low pressure oil annular groove (40) between the second core body seal groove and the 3rd core body seal groove.
4. easy control hydraulic pressure corner according to claim 1 is from servovalve; The inwall that it is characterized in that said valve pocket (8) is provided with 4 shoulders (27) equably; Each shoulder (27) is approximate cuboid; Equal and the parallel axes of the length direction of each shoulder (27), the end face that extends radially out end of each shoulder (27) is an arc surface, the radius of said arc surface is identical with the nominal size of the cylinder radius of spool (9);
The cylndrical surface of valve pocket (8) is provided with 2 ~ 5 upper semi-circle oil ring grooves (36) and 2 ~ 5 lower semi-circle oil ring grooves (37) equably along axis; Upper semi-circle oil ring groove (36) and lower semi-circle oil ring groove (37) all are semicircle shape; The two ends of semicircle are equipped with through hole, are arranged between upper semi-circle oil ring groove (36) and lower semi-circle oil ring groove (37); Each upper semi-circle oil ring groove (36) projection on cross section is identical; Each lower semi-circle oil ring groove (37) projection on cross section is identical, and the line at the through hole center at upper semi-circle oil ring groove (36) two ends is vertical each other with the projection of line on cross section at the through hole center at lower semi-circle oil ring groove (37) two ends;
4 shoulders (27) of valve pocket (8) and spool (9) form four oil pockets, are respectively first oil pocket (20), second oil pocket (23), the 3rd oil pocket (24) and the 4th oil pocket (26); Wherein, first oil pocket (20) and the 3rd oil pocket (24) communicate through lower semi-circle oil ring groove (37), and second oil pocket (23) and the 4th oil pocket (26) communicate through upper semi-circle oil ring groove (36).
5. easy control hydraulic pressure corner according to claim 1 is from servovalve; It is characterized in that said fixed stop (5) is a strip; The equal in length of the hollow cylinder (35) of the length of fixed stop (5) and valve body (7) left end; The lower camber side center of fixed stop (5) is provided with strip block seal groove along axial direction, strip block seal groove and fixed stop (5) equal in length, and strip block seal groove is embedded with the block Stamping Steel Ribbon.
6. easy control hydraulic pressure corner according to claim 1 is from servovalve; It is characterized in that said blade (15) is a strip; The equal in length of the hollow cylinder (35) of the length of blade (15) and valve body (7); The lower camber side center of blade (15) is provided with strip runner sealing groove along axial direction, strip runner sealing groove and blade (15) equal in length, and strip runner sealing groove is embedded with runner sealing bar (25).
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| CN201210033081.6A CN102562701B (en) | 2012-02-15 | 2012-02-15 | Easily controlling hydraulic corner self-servo valve |
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| CN201210033081.6A CN102562701B (en) | 2012-02-15 | 2012-02-15 | Easily controlling hydraulic corner self-servo valve |
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| CN104179746A (en) * | 2014-08-15 | 2014-12-03 | 武汉科技大学 | Self-servo hydraulic robot joint capable of continuously rotating |
| CN108916150A (en) * | 2018-09-21 | 2018-11-30 | 武汉科技大学 | A kind of pilot-operated type hydraulic corner self-servo valve |
| CN109058495A (en) * | 2018-08-15 | 2018-12-21 | 山东科技大学 | A kind of proportional valve and its working method |
| CN109469058A (en) * | 2018-10-15 | 2019-03-15 | 许慧保 | A kind of hydraulic excitation high frequency linear percussion mechanism |
| CN109737112A (en) * | 2019-01-30 | 2019-05-10 | 广东科达洁能股份有限公司 | A kind of super-pressure dynamic valve |
| CN112943731A (en) * | 2021-03-18 | 2021-06-11 | 同济大学 | Reversing valve of shaft flow distribution switch |
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| CN102979777A (en) * | 2012-12-03 | 2013-03-20 | 武汉科技大学 | Rotary valve type large torque hydraulic corner self-servo valve |
| CN103234060A (en) * | 2013-04-12 | 2013-08-07 | 阜新力夫特液压有限公司 | Radial-force-balanced manual control air valve |
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| CN104154068A (en) * | 2014-08-07 | 2014-11-19 | 武汉科技大学 | Corner self-servo valve control annular cylinder |
| CN104179746A (en) * | 2014-08-15 | 2014-12-03 | 武汉科技大学 | Self-servo hydraulic robot joint capable of continuously rotating |
| CN109058495B (en) * | 2018-08-15 | 2023-08-29 | 山东科技大学 | Quantitative valve and working method thereof |
| CN109058495A (en) * | 2018-08-15 | 2018-12-21 | 山东科技大学 | A kind of proportional valve and its working method |
| CN108916150A (en) * | 2018-09-21 | 2018-11-30 | 武汉科技大学 | A kind of pilot-operated type hydraulic corner self-servo valve |
| CN109469058A (en) * | 2018-10-15 | 2019-03-15 | 许慧保 | A kind of hydraulic excitation high frequency linear percussion mechanism |
| CN109737112A (en) * | 2019-01-30 | 2019-05-10 | 广东科达洁能股份有限公司 | A kind of super-pressure dynamic valve |
| CN112943731A (en) * | 2021-03-18 | 2021-06-11 | 同济大学 | Reversing valve of shaft flow distribution switch |
| CN112943731B (en) * | 2021-03-18 | 2022-04-01 | 同济大学 | Reversing valve of shaft flow distribution switch |
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Effective date of registration: 20181218 Address after: 430081 No. 743 Peace Avenue, Qingshan District, Wuhan City, Hubei Province Patentee after: Wuhan University of Science and Technology Asset Management Co., Ltd. Address before: 430081 construction of Qingshan District, Hubei, Wuhan Patentee before: Wuhan University of Science and Technology |
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