CN102829010A - Directly moving type high-flow directional flow servo valve and control system using servo valve - Google Patents
Directly moving type high-flow directional flow servo valve and control system using servo valve Download PDFInfo
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- CN102829010A CN102829010A CN2012102935758A CN201210293575A CN102829010A CN 102829010 A CN102829010 A CN 102829010A CN 2012102935758 A CN2012102935758 A CN 2012102935758A CN 201210293575 A CN201210293575 A CN 201210293575A CN 102829010 A CN102829010 A CN 102829010A
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Abstract
The invention discloses a directly moving type high-flow directional flow servo valve and a control system using the servo valve. A valve core of the servo valve is pushed by a cam shaft driven by a servo motor; the cam shaft comprises an eccentric section and a driving section; one end of the valve core is pressed and leaned against a shaft surface of the eccentric section; a zero position sensing head is arranged on the shaft surface of the driving section; an inductive sensor which is matched with the zero position sensing head is arranged on a cam box; the inductive sensor is connected with a controller; and the controller is used for receiving a signal of the inductive sensor, controlling the servo motor to rotate back and forth in a small scope and performing the zero position positioning on the valve core. The servo valve is high in response speed and high in control precision. Meanwhile, the zero position positioning of the valve core is high in accuracy, is free from temperature null shift and is high in repeating precision. The adjusting time for the zero position positioning is short and a hydraulic system is relative stable when the zero position is adjusted.
Description
Technical field
The invention belongs to servovalve design and manufacturing technology field, particularly a kind of straight ejector half big direction of the traffic flow servovalve and use the control system of this servovalve.
Background technique
Mostly existing directional flow servovalve is electric-hydraulic proportion direct-acting type or pilot type servo valve, and it drives one-level single nozzle baffle plate by torque motor or MD moving coil electromagnet, Dual Injector Baffle, and the pilot valve of jet nozzle structure is again through secondary, three grades of amplifications.Promote big flow valve core of the spool valve (major diameter spool) by the hydraulic coupling difference and do axial displacement, axial displacement are measured spool through differential transformer (displacement transducer) zero-bit and direction of displacement and displacement amount.Its spool speed of response is low, and the displacement control accuracy is low, and repeatability is poor, zero location drift, and particularly oil liquid temperature zero drift is bigger.And because used torque motor or moving-coil electromagnet; Be as controlled quentity controlled variable, so when carrying out the pulse digit communication, carry out D/A (A/D) conversion with electric current and voltage with microcomputer; Its speed of response is slow; Error of calculations is big, and is difficult to and digital computer or the direct and two-way exchanges data of Ethernet, therefore is difficult in the automation control of high-end field and obtains comparatively ideal application.
For addressing the above problem; Chinese patent CN101603876A discloses a kind of vibration waveform controlling system of electro-hydraulic exciter; This control system comprises a kind of parallelly connected servovalve, and this parallel connection servovalve promotes parallelly connected valve core of servo valve by zero inclined to one side actuating motor control cam mechanism and slides; This servovalve is owing to directly controlled by actuating motor, and it can accomplish that the spool speed of response is fast, and departure is less.But; This servovalve fails to solve the problem of zero-bit location; The existing servovalve that adopts actuating motor control spool; Its zero-bit location,, constitutes semiclosed loop and realizes zero control through the feedback line input controller the zero-bit of spool and the contrast of real-time displacement data through the rotating coder on actuating motor.But the camshaft that real-time displacement need be controlled spool rotates repeatedly and can confirm, its adjusting time is longer, and simultaneously spool drifts about about along with camshaft, causes the hydraulic system poor stability.
Summary of the invention
For this reason; Technical problem to be solved by this invention is that adjusting time of zero-bit location of the big direction of the traffic flow of existing straight ejector half servovalve is longer; And when regulating zero-bit, the problem of hydraulic system less stable, and then provide a kind of zero-bit location governing speed fast directional flow servovalve.
For solving the problems of the technologies described above, the present invention discloses the big direction of the traffic flow of a kind of straight ejector half servovalve, and it comprises; Valve body is provided with spool in the said valve body, controls the actuating motor that said spool moves; And be arranged at the cam mechanism between said actuating motor and the said valve body; Said cam mechanism is arranged in the cam box, and said cam mechanism comprises: by the camshaft of said driven by servomotor, said camshaft comprises eccentric segment and drives section; One end of said spool is pressed against on the axial plane of said eccentric segment, and the said axial plane that drives section is provided with the zero-bit inductive head; Said cam box is provided with the inductive sensor that cooperates with said zero-bit inductive head; Said inductive sensor is used to be connected to controller; Said controller is accepted the signal of said inductive sensor, controls said actuating motor and rotates, and said spool is carried out the zero-bit location.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve, said driven by servomotor retarder, the output shaft of said retarder drives said camshaft; Wherein, said output shaft is provided with said spool is vertical.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve, said zero-bit inductive head is to be threadedly connected to the said round head bolt that drives section, and said inductive sensor is a proximity detector.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve; Said servovalve is the zero lap valve of straight ejector half 3-position 4-way; Be provided with five sections valve pockets that are fitted and connected mutually between said spool and the said valve body, offer connection oil inlet P, oil return inlet T on the said valve pocket respectively; And the filler opening A/B of actuator, the through hole of the oil outlet B/A of actuator; The week of said spool upwards is provided with the throttling groove; The corresponding said filler opening A/B of actuator of said throttling groove; The flow at the place, control limit, both sides of the oil outlet B/A of actuator is to the said filler opening A/B of actuator, and the flow of the said oil outlet B/A of actuator midway is linear.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve, said throttling groove is the rhombus groove, and the summit that said rhombus groove is relative is arranged at the said filler opening A/B of actuator respectively, and on the control limit of the both sides of the said oil outlet B/A of actuator; Said rhombus groove shaped triangularity passage section.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve, said valve body is connected with end bracket enclosed at the opposite side away from said cam mechanism, is provided with the elastic component that is pressed against said spool in the said end cap.
In the big direction of the traffic flow of the above-mentioned straight ejector half servovalve, said cam shaft distal is stretched out said cam box outside from an end of said output shaft; Its end is fixedly connected with the handwheel that resets with scale value.
The present invention discloses a kind of control system of using above-mentioned servovalve simultaneously; It comprises, the controller that is electrically connected with actuating motor on the said servovalve, the hydraulic actuator that is connected with said servovalve; And the position detecting device that is used to detect said hydraulic actuator position information; The position of the said hydraulic actuator that said position detecting device collects, direction, velocity information input to said controller, after the information and set information contrast of said controller according to collection, control said actuating motor rotation; And then the said spool of controlling said servovalve moves, and finally realizes said hydraulic actuator position, direction, speed regulation.
In the above-mentioned control system, said controller is through the said actuating motor of driver drives.
In the above-mentioned control system, said hydraulic actuator is oil hydraulic cylinder or oil hydraulic motor, and said position detecting device corresponds to linear encoder or rotating coder.
Technique scheme of the present invention is compared existing technology and is had the following advantages:
(1) spool of servovalve of the present invention adopts straight ejector half valve core structure, to oil cleanliness, oil temperature, all the standard with common hydraulic parts is identical for Environmental Conditions, has reduced user cost.Spool of the present invention is realized through actuating motor control cam mechanism; Rotating coder is equipped with in the actuating motor rear end; Can directly collect the pulse data of spool zero-bit and positive and negative displacement, and feed back to computer controller, spool zero positioning precision is 0.0001; No temperature drift, repeatability is up to 0.001mm.Simultaneously actuating motor can directly carry out two-way data communication with Field bus, Ethernet, remote control impulse controller, and need not the A/D conversion, so response is fast, control accuracy is accurate, is easy to automation control and controls with nobody.Be provided for the positioning means of zero-bit location on the camshaft of cam mechanism; It comprises the zero-bit inductive head that is arranged on the camshaft actuated section axial plane and is arranged at the inductive sensor on the cam box; Said inductive sensor is connected to controller; Said controller is accepted the signal of said inductive sensor, controls said actuating motor and rotates, and said spool is carried out the zero-bit location.The rotating coder of the upper end of said actuating motor can feed back to controller to the zero-bit of spool and real-time displacement data, constitutes half-closed loop control.So the accurate positioning of spool zero-bit, no temperature zero drift makes oil cylinder piston bar (oil motor output shaft) control accuracy high, and response is fast, and repeatability is high.When controller sends spool and returns zero instruction, be designed with inductive sensor and zero-bit inductive head, make actuating motor near the zero-bit inductive head among a small circle in, find zero-bit very soon.
(2) and; This servovalve and actuating motor adopt the structural type of integrated form, and comparing needs in the existing hydraulic control system design specially servovalve and actuating motor to be carried out matching mode, zero drift; Repeatability guarantees more easily, and the production assembly cost is low.
(3) spool and the valve pocket that cooperating of valve body adopts the disjunction structure and the fit form of spool in the servovalve of the present invention; It compares the spool and the valve body of monolithic construction, and the size on four control limits can be measured respectively in the mill, guarantees consistent size; The manufacturability of spool and valve pocket guarantees easily; Can make four control limits be zero lap like this, make the control no-blind area, speed of response is high.And spool adopts the line cutting to cut out the throttling groove of rhombus; And the triangle open mouth that rhombus groove and valve pocket endoporus constitute plays the restriction effect, and the pressure flow curve all has certain inclined-plane when open and close, not vibrations; Control has steadily been eliminated the pressure flow jump.And the throttling groove of rhombus makes the spool shifting axle reduce 60%-70% to hydraulic coupling, and slowing down to increase through retarder has again guaranteed that spool does not have stuck phenomenon, has improved reliability after turning round.
(4) camshaft of servovalve of the present invention is fixedly connected with the handwheel that resets with scale value in the end away from an end of said output shaft, and when system broke down, available manual rotation hand wheel made spool get back to original position, and hydraulic actuator is resetted.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the sectional drawing of the big direction of the traffic flow of straight ejector half of the present invention servovalve;
Fig. 2 is the stereogram of spool of working in coordination of the present invention and valve pocket;
Fig. 3 is the structural representation of position control system of the present invention;
Fig. 4 is that three oil cylinders using servovalve of the present invention are formed X, Y, Z three shaft space curve interpolating kinetic control systems.
Fig. 5 is a control system of using six flexible rod six-degree-of-freedom working machine hands of servovalve of the present invention.
Reference character is expressed as among the figure:
The 1-valve body, 2-spool, 21-throttling groove, 3-actuating motor, 4-camshaft; 41-drives section, 42-eccentric segment, 5-zero-bit inductive head, 6-speed reducer, 7-output shaft; 8-valve pocket, 9-inductive sensor, 10-end cap, 11-casing, the 12-handwheel that resets; The 13-hydraulic actuator, 14-position detecting device, 15-elastic component, 16-controller, 17-driver.
Embodiment
Below will combine accompanying drawing, and use following examples that the present invention is further set forth.
Embodiment 1
Fig. 1 is the big direction of the traffic flow of a straight ejector half disclosed by the invention servovalve, and it comprises, valve body 1 is provided with spool 2 in the said valve body 1; Control the actuating motor 3 that said spool 2 moves; And be arranged at the cam mechanism between said actuating motor 3 and the said valve body 1; Said cam mechanism is arranged in the cam box 11, and said cam box 11 is tightly connected with said valve body 1 and said actuating motor 3 respectively.Said cam mechanism comprises: by the camshaft 4 of said actuating motor 3 drivings; Said camshaft 4 comprises eccentric segment 42 and drives section 41; One end of said spool 2 is pressed against on the axial plane of said eccentric segment 42, and the said axial plane that drives section 41 is provided with zero-bit inductive head 5; Corresponding said zero-bit inductive head 5 is provided with inductive sensor 9 on the said cam box 11; Said inductive sensor 9 is used to be connected to controller; Said controller is accepted the signal of said inductive sensor 9, controls said actuating motor 3 and rotates, and said spool 2 is carried out the zero-bit location.
Wherein, said zero-bit inductive head 5 is for being threadedly connected to the said round head bolt that drives section 41, and said inductive sensor 9 is a proximity detector.The upper end of said actuating motor 3 is equipped with the magnetic grid rotating coder can feed back to controller 52 to the zero-bit of spool and real-time displacement data, constitutes half-closed loop control.So the accurate positioning of spool zero-bit, no temperature zero drift can make oil cylinder piston bar (oil motor output shaft) control accuracy high, and response is fast, and repeatability is high.When said controller 16 sends spool and returns zero instruction; Said inductive sensor 9 is through the position of the said zero-bit inductive head 5 of induction (round head bolt); The position information of said camshaft 4 is transferred to said controller 16; The said actuating motor 3 of controller 16 control near said round head bolt among a small circle in, find zero-bit very soon.
Said actuating motor 3 drives retarder 6 and realizes slowing down to increase turning round, and the output shaft 7 of said retarder 6 drives said camshaft 4; Wherein, said output shaft 7 and said spool 2 vertical settings.
Said servovalve is the zero lap valve of straight ejector half 3-position 4-way.Be provided with five sections valve pockets that are fitted and connected mutually 8 between said spool 2 and the said valve body 1, as shown in Figure 2.Offer the connection oil inlet P respectively on the said valve pocket 8, oil return inlet T, and the filler opening A/B of actuator, the through hole of the oil outlet B/A of actuator; Said 2 weeks of spool upwards are provided with throttling groove 21; As shown in Figure 2; The said throttling groove 21 corresponding said filler opening A/B of actuator; The flow at the place, control limit, both sides of the oil outlet B/A of actuator is to the said filler opening A/B of actuator, and the flow of the said oil outlet B/A of actuator midway is linear.Said spool 2 is at the filler opening A/B of actuator; Be processed with four triangular shaped recess surface respectively on the oil outlet B/A of the actuator circumference; The two ends wedge angle of concave surface is minimum vertically; The centre is the wideest the darkest, between said two wedge angles apart between the control limit of E/D/F and said valve pocket 8 apart from the e/d/f correspondent equal, constitute four zero laps control limits.
Preferably, said groove 21 is the rhombus groove, and the summit that said rhombus groove is relative is arranged at the said filler opening A/B of actuator respectively, and on the control limit of the both sides of the said oil outlet B/A of actuator; Said rhombus groove shaped triangularity passage section.During work, said spool 2 moves to left, and high pressure oil P mouth communicates with the B mouth, and the A mouth communicates with oil return inlet T.Otherwise spool moves right, and high pressure oil P mouth communicates with the A mouth, and the B mouth communicates with oil return inlet T, and the amount of said spool move left and right is ascending, and the triangle passage section that the oblique concave surface of triangle and valve pocket endoporus on the spool are formed also changes from small to big, and flow is changed from small to big.Said four zero laps control limit, spool adopts the line cutting to cut out oblique concave surface, and said valve pocket 8 adopts the disjunction structure, thus the size on four control limits can be measured respectively in the mill, guarantee consistent size, enable four control limits and all adopt zero lap.The four limit zero laps that more than characterize make the control no-blind area, and speed of response is high.The triangle restriction that said rhombus groove and said valve pocket 8 endoporus constitute makes the pressure flow curve that certain inclined-plane all arranged when open and close, not vibrations, and control has steadily been eliminated the pressure flow jump.
Said valve body 1 is tightly connected through screw and end cap 10 at the opposite side away from said cam mechanism, is provided with the elastic component 15 that is pressed against said spool 2 in the said end cap 10.Under the effect of the spring pressure of said elastic component 15, said spool 2 right-hand member spheres are pressed on the axial plane of said eccentric segment 42 all the time.
Said camshaft 4 stretches out said cam box 11 outsides away from an end of said output shaft 7; Its end is fixedly connected with the handwheel 12 that resets with scale value.The pointer of the scale value of indicating graduation dish by screw on bearing cap.When debugging in the early stage, the corner of the said actuating motor 3 of direct viewing with the naked eye and revolution, rotating speed, turn to.When system's control is broken down, available manual rotary reset handwheel 12, and make said spool 2 get back to zero-bit, to hydraulic actuator (for example oil hydraulic cylinder) is resetted.
Fig. 3 is the control system of the above-mentioned servovalve of application disclosed by the invention; It comprises; The controller 16 that is electrically connected with actuating motor 3 on the said servovalve, the hydraulic actuator 13 that is connected with said servovalve, and the position detecting device 14 that is used to detect said hydraulic actuator 13.In this mode of execution, said hydraulic actuator 13 is oil hydraulic cylinders, and said position detecting device 14 is a linear encoder.
Direction of displacement, speed, the position data of the said hydraulic actuator 13 that said position detecting device 14 collects inputs to said controller 16; After the position information contrast of said controller 16 according to information of gathering and setting; Control said actuating motor 3 rotations; And then said spool 2 amount of movements are carried out correction-compensation, finally realize said hydraulic actuator 13 directions, speed, position regulation.
Said controller 16 drives said actuating motor 3 through driver 17.
Hydraulic actuator described in this mode of execution 13 is an oil hydraulic cylinder, and said position detecting device 14 corresponds to linear encoder.
The working procedure of having used the position control system of this servovalve is:
Said controller 16 is set out Motion curves, output pulse command; Input to driver 17, said driver 17 is imported said actuating motor 3 to umber of pulse, pulse frequency, pulse direction after carrying out power amplification to parameter; The output shaft of said actuating motor 3 is by the instruction rotation; And through said retarder 6, drive said camshaft 4 and rotate synchronously, the said eccentric segment 42 of said camshaft 4 drives said spool 2 move left and right.When said spool 2 moves right, open PA hole and BT hole, high pressure oil P gets into the cavity of resorption of said oil hydraulic cylinder through oil pipe; The oil return of oil hydraulic cylinder 13 epicoeles is through going into oilhole B; And pass through the BT chamber through hole T oil sump tank, and the piston rod of said oil hydraulic cylinder 13 is up, and said piston rod drags the reading terminal uplink synchronization of linear encoder 14 through rigid connector; Reading terminal is imported said controller 16 to said oil hydraulic cylinder 13 moving direction, speed, the length data that collect through feedback conductor; Said controller 16 compares setup parameter and acquisition parameter, after the power amplification, imports 17 pairs of said actuating motor 3 corners of said driver to parameter again and revises and compensate; Kinematic parameter and setup parameter up to said oil hydraulic cylinder 13 are in full accord, have accomplished servo real-time control with this.
Otherwise,, open PB chamber and AT chamber when said spool 2 is moved to the left; High pressure is moored the epicoele of P through oil pipe entering oil hydraulic cylinder, and the oil of cavity of resorption gets into the A hole through oil pipe, and passes through the AT chamber from T orifice flow oil sump tank; The piston rod of said oil hydraulic cylinder 13 is descending, and said piston rod drags the reading terminal DL synchronization of linear encoder 13 through the rigid joint part, and said reading terminal is the oil hydraulic cylinder moving direction, speed, the length data that collect; Through feedback conductor input controller 16; Through the data comparison, 17 pairs of said actuating motor 3 corners of the said driver of input are revised and compensated after the power amplification, and are in full accord up to the reversing motion parameter and the setup parameter of said oil hydraulic cylinder 13.
Said controller 16 is taked increment type pulse number modulation (PNM); Rotating speed and corner (promptly equaling the velocity of displacement and the displacement amount of spool), the pulse number modulation (PNM) of controlling said actuating motor 3 are to count on the basis of signal at arteries and veins; The step number in each sampling period is increased on last sampling period step number or reduce some step numbers (rotating speed and corner), reach piston motion direction, speed, position and approach setting value.The realization of this function depends on that also said throttling groove 21 of two sections of said spool 2 and the triangle oil duct that said valve pocket 8 forms have high pressure oil and oil return binodal stream function; The corner that is said actuating motor 3 and said camshaft 4 is big more; The axial internal clearance of said spool 2 is big more; Throttling triangle hydraulic fluid port is just big more, and said hydraulic actuator 13 (oil cylinder piston bar or oil motor output shaft) speed is big more, until maximum.Otherwise the corner of said actuating motor 3 and said camshaft 4 is more little, and movement velocity is more little, stops until zero-bit.When controller sends the instruction that the arbitrary position stops; Said actuating motor 3 can make said camshaft 4 move to zero-bit; The position that this moment, said inductive sensor 9 was sensed said zero-bit inductive head 5; Make said camshaft 4 said zero-bit inductive head 5 among a small circle in find zero-bit rapidly, dead to making said spool 2 can close the oil sealing of four limits of PABT, oil hydraulic cylinder epicoele, cavity of resorption, then oil hydraulic cylinder stops.
This servo-system also can accept data that Ethernet or telechirics and other automation control system collect, through Data In-Line, carry out real-time servocontrol to data input controller.
Embodiment 2
As shown in Figure 4; Adopt flow servovalve, three the said hydraulic actuators 13 described in 16, three said drivers 17 of a said controller and three present embodiments 1: oil hydraulic cylinder (oil motor>and three said position detecting devices 14: linear encoder (rotating coder) just can realize that three oil hydraulic cylinders (oil motor) carry out the interpolation interlock control in real time of space curve.
Embodiment 3
As shown in Figure 5; Adopt a said controller 16; Six said drivers 17 and six embodiment's 1 said servovalves; Six said hydraulic actuators 13: carry out oil hydraulic cylinder (oil motor), six said position detecting devices 14: linear encoder (rotating coder), just can realize the parallelly connected servocontrol of six-freedom hydraulic heavy-duty machinery hand or working machine hand; Start a hydraulic servo machinery new application, realize multi-shaft interlocked Hydraulic Servo Control at super large heavy duty industrial equipment, military hardware.Subtract like: radar tracking, satellite navigation, unmanned, boats and ships distant, the Hydraulic Servo Control of equipment such as boat-carrying guided missile automatic aiming emission.
In other embodiments, said position detecting device 14 can also be that displacement transducer is used to detect displacement, and simultaneously, said hydraulic actuator 13 can also be selected oil hydraulic motor for use according to the application, and at this moment, said encoder 14 corresponds to rotating coder.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to mode of execution.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. the big direction of the traffic flow of straight ejector half servovalve, it comprises,
Valve body (1) is provided with spool (2) in the said valve body (1);
Control the actuating motor (3) that said spool (2) moves;
And being arranged at the cam mechanism between said actuating motor (3) and the said valve body (1), said cam mechanism is arranged in the cam box (11); It is characterized in that:
Said cam mechanism comprises: by the camshaft (4) of said actuating motor (3) driving; Said camshaft (4) comprises eccentric segment (42) and drives section (41); One end of said spool (2) is pressed against on the axial plane of said eccentric segment (42), and the said axial plane that drives section (41) is provided with zero-bit inductive head (5); Said cam box (11) is provided with the inductive sensor (9) that cooperates with said zero-bit inductive head (5); Said inductive sensor (9) is used to be connected to controller (16); Said controller (16) is accepted the signal of said inductive sensor (9); Control said actuating motor (3) and rotate, said spool (2) is carried out the zero-bit location.
2. the big direction of the traffic flow of straight ejector half according to claim 1 servovalve is characterized in that:
Said actuating motor (3) drives retarder (6), and the output shaft (7) of said retarder (6) drives said camshaft (4); Wherein, said output shaft (7) and the vertical setting of said spool (2).
3. the big direction of the traffic flow of straight ejector half according to claim 1 and 2 servovalve is characterized in that:
Said zero-bit inductive head (5) is for being threadedly connected to the said round head bolt that drives section (41), and said inductive sensor (9) is a proximity detector.
4. the big direction of the traffic flow of straight ejector half according to claim 3 servovalve is characterized in that:
Said servovalve is the zero lap valve of direct-acting type 3-position 4-way; Be provided with five sections valve pockets that are fitted and connected mutually (8) between said spool (2) and the said valve body (1); Said valve pocket offers the connection oil inlet P respectively on (8); Oil return inlet T, and the filler opening A/B of actuator, the through hole of the oil outlet B/A of actuator; The week of said spool (2) upwards is provided with throttling groove (21); The corresponding said filler opening A/B of actuator of said throttling groove (21); The flow at the place, control limit, both sides of the oil outlet B/A of actuator is to the said filler opening A/B of actuator, and the flow of the said oil outlet B/A of actuator midway is linear.
5. the big direction of the traffic flow of straight ejector half according to claim 4 servovalve is characterized in that:
Said throttling groove (21) is the rhombus groove, and the summit that said rhombus groove is relative is arranged at the said filler opening A/B of actuator respectively, and on the control limit of the both sides of the said oil outlet B/A of actuator; Said rhombus groove shaped triangularity passage section.
6. according to the big direction of the traffic flow of the arbitrary described straight ejector half of claim 1-5 servovalve, it is characterized in that:
Said valve body (1) is tightly connected at opposite side and the end cap (10) away from said cam mechanism, is provided with the elastic component (15) that is pressed against said spool (2) in the said end cap (10).
7. the big direction of the traffic flow of straight ejector half according to claim 6 servovalve is characterized in that:
Said camshaft (4) stretches out said cam box (11) outside away from an end of said output shaft (7); Its end is fixedly connected with the handwheel that resets (12) with scale value.
8. an application rights requires the control system of the arbitrary said servovalve of 1-7, it is characterized in that:
It comprises, the controller (16) that is electrically connected with actuating motor (3) on the said servovalve,
The hydraulic actuator (13) that is connected with said servovalve,
And the position detecting device (14) that is used to detect said hydraulic actuator (13) position information,
Position, direction, the velocity information of the said hydraulic actuator (13) that said position detecting device (14) collects input to said controller (12); After the information and set information contrast of said controller (12) according to collection; Control said actuating motor (3) rotation; And then control said spool (2) and move, finally realize said hydraulic actuator (13) position, direction, speed regulation.
9. control system according to claim 8, its characteristic is:
Said controller (16) drives said actuating motor (3) through driver (17).
10. according to Claim 8 or 9 described control system, its characteristic is:
Said hydraulic actuator (13) is oil hydraulic cylinder or oil hydraulic motor, and said position detecting device (14) corresponds to linear encoder or rotating coder.
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| CN201210293575.8A CN102829010B (en) | 2012-08-16 | 2012-08-16 | Direct acting type large discharge directional flow servovalve and apply the control system of this servovalve |
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| CN108397448A (en) * | 2018-04-23 | 2018-08-14 | 浙江大学宁波理工学院 | Dual valve loads independent control type electro-hydraulic vibration exciter and its electro hydraulic exciting system and bias control method |
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| CN114135711A (en) * | 2021-12-08 | 2022-03-04 | 中国航发南方工业有限公司 | Novel servo hydraulic linear butterfly regulating valve |
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| CN104179742A (en) * | 2014-07-22 | 2014-12-03 | 西安交通大学 | High-speed hydraulic reversing slide valve |
| CN105570239A (en) * | 2016-01-15 | 2016-05-11 | 中联重科股份有限公司 | Anti-blocking control equipment, system, method and mechanical equipment for stepping hydraulic element |
| CN105570239B (en) * | 2016-01-15 | 2017-06-16 | 中联重科股份有限公司 | The anti-blocking control device of step type hydraulic element, system, method and plant equipment |
| CN105757304A (en) * | 2016-05-09 | 2016-07-13 | 北京航空航天大学 | High-precision flow servo control valve |
| CN106870498A (en) * | 2017-04-20 | 2017-06-20 | 辽宁工程技术大学 | A kind of super-flow quick release valve |
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| CN108799236B (en) * | 2018-08-24 | 2023-10-17 | 油威力液压科技股份有限公司 | High-pressure-resistant digital rotary motor driven servo valve |
| CN108799236A (en) * | 2018-08-24 | 2018-11-13 | 油威力液压科技股份有限公司 | High pressure resistant digital electric rotating machine drives servo valve |
| CN108758065A (en) * | 2018-08-28 | 2018-11-06 | 油威力液压科技股份有限公司 | Digital big flow electric rotating machine drives ball screw type direct acting overflow valve |
| CN109374288A (en) * | 2018-11-19 | 2019-02-22 | 南京晨光集团有限责任公司 | A kind of rotary flow control valve zero-bit regulating device |
| CN113958553A (en) * | 2021-11-26 | 2022-01-21 | 杭州辰淼自动化系统有限公司 | CAN bus electro-hydraulic servo valve controller integrated with magnetic encoder |
| CN114135711A (en) * | 2021-12-08 | 2022-03-04 | 中国航发南方工业有限公司 | Novel servo hydraulic linear butterfly regulating valve |
| CN114135711B (en) * | 2021-12-08 | 2023-11-03 | 中国航发南方工业有限公司 | Novel servo hydraulic linear butterfly regulating valve |
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