CN1266145A - Electricity-liquid converter - Google Patents
Electricity-liquid converter Download PDFInfo
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- CN1266145A CN1266145A CN00106226A CN00106226A CN1266145A CN 1266145 A CN1266145 A CN 1266145A CN 00106226 A CN00106226 A CN 00106226A CN 00106226 A CN00106226 A CN 00106226A CN 1266145 A CN1266145 A CN 1266145A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The present invention discloses a stepping machinery external feedback electro-hydralic servo device, also called electro-hydraulic converter, for water-turbine regulation, including stepping motor, main pressure distribution valve and feedback mechanism. When the pulse signal is input, the stepping motor utilizes gear to drive screw arbor t make piston of main pressure distribution valve move to control pressure oil trend of main pressure distribution valve, its feedback mechanism can automatically implement feedback to control water-turbine unit. Said electro-hydraulic converter not only possesses the midpoint-restoring property and can form one-to-one correspondent relationship of input signal and servomotor displacement, but also features strong reliability, high sensitivity, quick response speed, good regulating quality and extensive application range, etc..
Description
The present invention relates to Water-Turbine Engine Adaption, specifically, is a kind of walking machinery external feedback sliding valve style electrohydraulic servo device that is used for Water-Turbine Engine Adaption, to call electro-control converter in the following text.
In recent years in Water-Turbine Engine Adaption, the electro-control converter that has adopted stepper motor to form by many families, the problem that some of them stepping electro-control converter still exists is not have mechanical feedback mechanism, there is not multiple middle characteristic, the feedback of servomotor needs to realize by electric, and the displacement of being defeated by the pulse signal of stepper motor and servomotor can not form relation one to one, can't quantitatively control servomotor in the time of manually; The patent of China Patent No. 96239747.4, discussed a kind of " the electric valve control cylinder formula electrohydraulic servo device of hydrogovernor " and solved the problems referred to above basically, but still have the some shortcomings part, a fixed support is arranged on the position feedback bar in this device, the position feedback bar is center swing with the fixed support during feedback, and the sensitivity of feedback depends mainly on the ratio of this fixed support to valve centre distance and fixed support to servomotor centre distance; And the fixed support position is relevant with the valve pocket stroke, valve pocket has oilhole and side-to-side movement in valve body in this device, owing to be subjected to the restriction of valve pocket stroke and other factor, fixed support on the position feedback bar can not be chosen on the desirable position, also be difficult for fixed support is cancelled, have to the fixed support on its position feedback bar is chosen near valve one side for reducing the valve pocket stroke, cause this device feedback speed slow thus, feedback lags behind bigger, sensitivity is descended, regulation quality is affected, valve pocket is that movement parts participates in regulating automatically in addition, make and unload in the valve Lou that link increases, then more outstanding to the speed regulator that the servomotor stroke is long, this has just limited its using scope.
The purpose of this invention is to provide a kind of electro-control converter, it not only has replies immediately middle characteristic soon, when valve port open mode power supply suddenly disappears again, can make the servomotor stop motion rapidly.The holding position is constant, is defeated by the pulse signal of stepper motor and the displacement energy of servomotor and forms relation one to one, can manually quantitatively control the servomotor displacement; And can save unlatching, shut-in time and adjust throttle valve, adjust servomotor opening and closing time and buffering time by the Automatic Program of setting, unload in it that Lou link is few, feedback speed is fast, highly sensitive, flexible arrangement, using scope be wide.
For achieving the above object, one aspect of the present invention provides a kind of electro-control converter, and it comprises: stepper motor, main control valve, feedback mechanism; Described stepper motor is that twin shaft is stretched, one end is provided with handwheel, the other end axle is provided with gear, described feedback mechanism is a screw rod---the pair of nut formula, the feedback nut sleeve is on screw rod, and the feedback nut is connected with feedback rod, the gear that screw rod one end is provided with and the gear engagement of stepper motor, screw rod and main control valve two center lines are arranged in parallel, and a bindiny mechanism that moving axially of screw rod can be passed to main control valve is arranged between screw rod and main control valve.
Adopt the main control valve piston on equal diameter three convex shoulders four limits in the above-mentioned main control valve, the one end has the minor diameter of prolongation; The master that certain main control valve also can be equal diameter three convex shoulders four limits joins the pressure piston and the auxiliary receiver piston is made of one, and the pin plug directly puts in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston is followed the motion of pin plug and moved.
Bindiny mechanism between described screw rod and main control valve can be, screw rod is connected with bar one end, and the bar the other end is connected with the minor diameter that the main control valve piston prolongs.
Bindiny mechanism between described screw rod and main control valve can also be, screw rod is connected with bar one end, and the pin plug of the bar the other end and main control valve is connected.
On the bar in above-mentioned bindiny mechanism fixed support can be set in addition, bar is around the swing of the center of fixed support during adjusting; Can be processed with restriction on the valve pocket of above-mentioned main control valve, be used to control servomotor and move and buffering the screw rod of above-mentioned feedback mechanism---pair of nut can adopt ball screw---pair of nut at a slow speed.
Another aspect of the present invention, a kind of electro-control converter is provided, comprise: stepper motor, main control valve, feedback mechanism, described stepper motor is that twin shaft is stretched, one end is provided with handwheel, the other end axle is provided with gear, described feedback mechanism is a screw rod---the pair of nut formula, the feedback nut sleeve is on screw rod, the feedback nut is connected with feedback rod, gear that screw rod one end is provided with and the gear engagement on the stepper motor, and main control valve is provided with by vertical, screw rod and main control valve two center lines are pressed several angle and are arranged that a bindiny mechanism that moving axially of screw rod can be passed to main control valve is arranged between screw rod and main control valve.
Adopt the main control valve piston on equal diameter three convex shoulders four limits in the above-mentioned main control valve, the one end can have the minor diameter of prolongation, and is processed with tooth on the minor diameter that prolongs; Certainly, the main control valve piston and the auxiliary receiver piston that in the main control valve can be equal diameter three convex shoulders four limits are made of one, pin plug one end is processed with tooth, and the other end is directly stretched in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston is followed the motion of pin plug and moved.
Bindiny mechanism between described screw rod and main control valve can be, screw rod one end is connected with ratch by bearing, locknut, and ratch is connected with toothed shifting block, and shifting block is connected with tooth on the minor diameter of main control valve piston prolongation again; Screw rod rotation and when moving axially by ratch, makes shifting block around center O ' swing, will move axially by ratch and shifting block drive main control valve piston and move.
Bindiny mechanism between described screw rod and main control valve can be, screw rod one end is connected with ratch by bearing, locknut, be connected by toothed shifting block between the pin plug that is processed with tooth of ratch and main control valve, screw rod rotation and when moving axially, pass through ratch, make shifting block around center O ' swing, will move axially by ratch and shifting block drive pin plug and move.
Above-mentioned in addition master joins---pair of nut can adopt ball screw---pair of nut that can be processed with restriction, the screw rod of above-mentioned feedback mechanism on the valve pocket of valve.
Another aspect of the present invention provides a kind of electro-control converter, comprising: stepper motor, main control valve and feedback mechanism; Described stepper motor is that twin shaft is stretched, one end is provided with handwheel, the other end axle is provided with gear, described feedback mechanism is a screw rod---the pair of nut formula, the feedback nut sleeve is on screw rod, and the feedback nut is connected with feedback rod, gear that screw rod one end is provided with and the gear engagement on the stepper motor, two center lines of screw rod and main control valve are pressed coaxial line and are arranged that a bindiny mechanism that moving axially of screw rod can be passed to main control valve is arranged between screw rod and main control valve.
Adopt the main control valve piston on equal diameter three convex shoulders four limits in the above-mentioned main control valve, the one end has the minor diameter of prolongation; Certainly, main control valve also can adopt main control valve piston and auxiliary receiver piston to be made of one, and the pin plug directly puts in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston is followed the motion of pin plug and moved.
Bindiny mechanism between described screw rod and main control valve can be that screw rod is connected by the minor diameter that bearing, locknut and main control valve piston prolong.
Bindiny mechanism between described screw rod and main control valve can be that screw rod is connected by the pin plug of bearing, locknut and main control valve.
---pair of nut can adopt ball screw---pair of nut that can be processed with restriction on the valve pocket of above-mentioned in addition main control valve, the screw rod of above-mentioned feedback mechanism.
Electro-control converter of the present invention has been owing to adopted mechanical feedback mechanism, when valve port is opened, servomotor just when the motion state sudden power, servomotor stop motion rapidly, and the holding position is constant; Have between the displacement of input pulse of stepper motor and servomotor output feature one to one, during manually-operable because the displacement of servomotor can be quantitatively controlled in the effect of feedback mechanism; Because valve pocket does not participate in automatic adjusting, the movement parts of main control valve is few, and Lou link is few so unload; Because feedback mechanism can directly or indirectly feed back to the main control valve piston through rod member with the displacement of servomotor, also rod member or the shifting block of displacement through changing fulcrum of servomotor can be passed to the main control valve piston to the servomotor displacement conversion again after desirable data, again owing to can adopt ball screw shaft---pair of nut, add and allow the rising rotating speed on the structure, so feedback speed is fast, highly sensitive, frictional force is little, regulation quality is good, because the movement velocity of servomotor depends on the pulse frequency of being defeated by stepper motor, the frequency of sending in changing in the per second like this, can change valve port opening, thereby change the movement velocity of servomotor, so can save unlatching, close the adjustment throttle valve, adjust servomotor by the Automatic Program of setting and open, shut-in time and buffering time; Certainly also can realize two sections closes; Servomotor moves at a slow speed and the quality of buffering in order further to improve, and is processed with restriction on valve pocket, and be outlet throttling, has so just further improved at a slow speed and has cushioned quality, and it is more steady to reach motion; In addition, can find out flexible arrangement of the present invention, the advantage that using scope is wide by following example.
Below in conjunction with drawings and Examples the present invention is described in further detail:
Fig. 1 is first embodiment's of an electro-control converter of the present invention sectional view.
Fig. 2 is second embodiment's of an electro-control converter of the present invention sectional view.
Fig. 3 is the 3rd embodiment's of an electro-control converter of the present invention sectional view.
Fig. 4 is the 4th embodiment's of an electro-control converter of the present invention sectional view.
Fig. 5 is the 5th embodiment's of an electro-control converter of the present invention sectional view.
Fig. 6 is the 6th embodiment's of an electro-control converter of the present invention sectional view.
Shown in Figure 1 is first embodiment of electro-control converter of the present invention, and it comprises stepper motor, main control valve, feedback mechanism, and described stepper motor 2 is that twin shaft is stretched, and an end is provided with handwheel 1, and the other end axle is provided with gear 3; Described main control valve comprises valve body 12, valve pocket 8 and main control valve piston 7, and wherein main control valve piston 7 adopts the main control valve piston on equal diameter three convex shoulders four limits, and the one end has the minor diameter of prolongation; Be processed with throttling hydraulic fluid port h on the described valve pocket 8, restriction length is a; Be used for realizing better that servomotor moves at a slow speed and buffering, described feedback mechanism is a ball screw pair, feedback nut 6 matches with screw rod 5, feedback nut 6 is connected with feedback rod 15, feedback rod 15 directly or indirectly is connected with the servomotor piston rod, gear 4 that is provided with on the screw rod 5 and 3 engagements of the gear of stepper motor 2, screw rod 5 and main control valve two axial lines are arranged in parallel, and the minor diameter that main control valve piston 7 one ends prolong is connected with the bar 9 on the screw rod 5; Main control valve hydraulic fluid port P is communicated with pressure oil all the time, and A, B hydraulic fluid port are communicated with servomotor AB working oil chamber respectively, and O is an oil back chamber.When stepper motor is static when not changeing, valve port P is in the meta closed condition, and servomotor is motionless; When stepper motor drove screw rod 5 and rotates an angle, beginning was because of the servomotor restraint of loads, and servomotor is motionless, and feedback rod 15, feedback nut 6 are also motionless; Screw rod 5 moves axially when rotating in feedback nut 6 like this; Screw rod 5 drives bar 9 and main control valve piston 7 corresponding moving axially, and makes the main control valve piston depart from meta, and P and A connect, and B and O connect, and servomotor moves to a direction; Meanwhile, the motion of servomotor drives feedback nuts 6, screw rod 5, bar 9 and main control valve piston 7 by feedback rod 15 again makes main control valve piston 7 move to meta, close until valve port, and the servomotor stop motion, valve port returns to initial closed state again.If continuously to the stepper motor transport pulse, make stepper motor do to rotate then servomotor continuous motion continuously; If change the pulse frequency height, the stepper motor rotating speed is just changed, the main control valve openings of sizes changes, and then changes the servomotor moving speed, if the input reverse impulse, the stepper motor counterrotating, corresponding oil circuit changes, and then servomotor is done reversing motion.
Shown in Figure 2 is second embodiment of electro-control converter of the present invention, and it comprises stepper motor, main control valve, feedback mechanism, and described stepper motor 2 is that twin shaft is stretched, one end is provided with handwheel 1, the other end axle is provided with gear 3, and described main control valve comprises: valve body 12, valve pocket 8 etc.; Wherein main control valve piston and auxiliary receiver piston are made of one 7, main control valve is equal diameter three convex shoulders four limit valves, on valve pocket 8, be processed with throttling hydraulic fluid port h, its length is a, auxiliary receiver two chamber work area differences, work area near main control valve piston one side is little, claims loculus here, at loculus the logical all the time pressure oil of one pressure hydraulic fluid port P is arranged; Another chamber work area is big, claims big chamber here, and pin plug 10 directly puts in the middle of the auxiliary receiver piston; Described feedback mechanism is a ball screw---the pair of nut formula, feedback nut 6 is enclosed within on the screw rod 5, feedback nut 6 is connected with feedback rod 15, and feedback rod 15 directly or indirectly is connected with the servomotor piston rod, gear 4 that is provided with on the screw rod 5 and 3 engagements of the gear on the stepper motor; Screw rod 5 and main control valve two axial lines are arranged in parallel; Screw rod 5 is connected with bar 9 one ends, the pin plug 10 of bar 9 the other ends and main control valve is connected, main control valve piston one side has hydraulic fluid port A, P, B, O, and P is communicated with pressure oil all the time, and A, B hydraulic fluid port are communicated with servomotor A, B working oil chamber respectively, and O is an oil back chamber, when stepper motor 2 is static when not changeing, pin plug 10 sealing hydraulic fluid ports, valve port P is in the meta closed condition, and servomotor is motionless; When stepper motor 2 drives angle of screw rod 5 rotations, beginning is because of the servomotor restraint of loads, servomotor is motionless, feedback rod 15, feedback nut 6 is also motionless, screw rod 5 moves axially when rotating in feedback nut 6 like this, if screw rod 5 drives bar 9 and pin plug 10, inserting the auxiliary receiver direction to pin plug 10 moves, the hydraulic fluid port of the big loculus of these hour hands plug 10 sealings is opened, the oil duct of pressure oil P on auxiliary receiver at auxiliary receiver loculus place, enter the loculus and the big chamber of auxiliary receiver simultaneously, because big chamber active area is big, so the direction that main control valve piston auxiliary receiver piston 7 moves to the pin plug under the pressure oil effect moves, makes corresponding the opening of main control valve piston upward pressure hydraulic fluid port P, P and A connect, B and O connect, and servomotor moves to a direction, meanwhile, the motion of servomotor drives feedback nut 6 by feedback rod 15 again, screw rod 5, bar 9 and pin plug 10 make pin plug 10 move to pull-out direction; At this moment, big chamber on the auxiliary receiver is communicated with oil extraction, and loculus is under pressure oil P effect, and main control valve piston auxiliary receiver piston 7 is followed 10 motions of pin plug, hydraulic fluid port P until main control valve piston one side closes, the servomotor stop motion, this moment, valve port returned to initial closed state again, when the input reverse impulse, the stepper motor counterrotating, main control valve piston auxiliary receiver piston 7 is followed 10 motions of pin plug and is moved, and corresponding oil circuit is changed, and servomotor is done reversing motion.Adopt this structure can use step motor drive than small capacity, the drive electric power unit price is descended, and manually control is light flexibly, controls because auxiliary receiver adopts opening to change, so the control accuracy height, speed of response is fast and overall performance electro-control converter of the present invention is complementary.
Fig. 3 shows the 3rd mode of execution of electro-control converter of the present invention, this electro-control converter and electro-control converter structure shown in Figure 1 are basic identical, its difference is: do not have the bar 9 among Fig. 1 among Fig. 3, screw rod 5 and main control valve two center lines are pressed several angle and are arranged, main control valve is vertical setting, screw rod 5 and main control valve two centers are pressed several angle and are arranged, here screw rod is to be horizontally disposed with, be processed with tooth on the minor diameter that main control valve piston 7 one ends prolong, screw rod 5 one ends are by bearing 16, locknut 14 is connected with ratch 17, ratch 17 is connected with toothed shifting block 19, and shifting block 19 is connected with tooth on the minor diameter that main control valve piston 7 prolongs again.Main control valve hydraulic fluid port P is communicated with pressure oil all the time, and A, B hydraulic fluid port are communicated with servomotor A, B working oil chamber respectively, and O is an oil back chamber; When stepper motor is static when not changeing, valve port P is in the meta closed condition, and servomotor is motionless; When stepper motor drives angle of screw rod 5 rotations, beginning is because of the servomotor restraint of loads, and servomotor is motionless, and feedback nut 6 is also motionless, screw rod 5 moves axially when rotating in feedback nut 6, by bearing 16 ratch 17 is moved axially, ratch 17 makes the center O swing of shifting block 19 around fan-shaped shifting block, drives main control valve piston 7 and does corresponding moving axially, make the main control valve piston depart from meta, P and A connect, and B and O connect, and servomotor moves to a direction; Meanwhile, the motion of servomotor drives feedback nut 6, screw rod 5 by feedback rod 15 again, by bearing 16, ratch 17, shifting block 19, main control valve piston 7 is moved to meta, realize machine feedback, close until valve port, servomotor stop motion, valve port return to initial closed state again; To stepper motor input continuous impulse, the servomotor continuous motion changes the pulse frequency height, can change the servomotor moving speed, the input reverse impulse, servomotor oppositely moves, as seen the basic functional principle of present embodiment is identical with first embodiment, no longer repeats here.
Fig. 4 shows the 4th mode of execution of electro-control converter of the present invention, this electro-control converter and electro-control converter structure shown in Figure 2 are basic identical, its difference is: do not have the bar 9 among Fig. 2 among Fig. 4, screw rod 5 and main control valve two center lines are pressed several angle and are arranged, here main control valve is vertical setting, screw rod is to be horizontally disposed with, be processed with tooth on the pin plug 10 of main control valve, screw rod 5 one ends are connected with ratch 17 by bearing 16 locknuts 14, ratch 17 is connected with toothed shifting block 19, shifting block 19 is connected hydraulic fluid port P with the pin plug 10 that is processed with tooth of main control valve again, A, P, B, O connects described identical with Fig. 2.When stepper motor 2 is static when not changeing, pin plug 10 is at sealing hydraulic fluid port state, and valve port P is in the meta closed condition, and servomotor is motionless; When stepper motor 2 drives angle of screw rod 5 rotations, beginning is because of the servomotor restraint of loads, servomotor is motionless, feedback rod 15, feedback nut 16 is also motionless, screw rod 5 moves axially when rotating in feedback nut 6 like this, by bearing 16, ratch 17 is moved axially, ratch 17 makes the center O swing of shifting block 19 around fan-shaped shifting block, drive pin plug 10 and do corresponding moving axially, if inserting the auxiliary receiver direction to pin plug 10 moves, the hydraulic fluid port of the big loculus of these hour hands plug 10 sealings is opened, the oil duct of pressure oil P on auxiliary receiver at auxiliary receiver loculus place enters the loculus and the big chamber of auxiliary receiver simultaneously, because big chamber active area is big, so the direction that main control valve piston auxiliary receiver piston 7 moves to pin plug 10 under the pressure oil effect moves, make corresponding the opening of main control valve piston upward pressure hydraulic fluid port P, P and A connect, B and O connect, servomotor moves to a direction, meanwhile, the motion of servomotor drives feedback nut 6 again by feedback rod 15, screw rod 5, by bearing 16, ratch 17, shifting block 19 makes pin plug 10 move to pull-out direction; Big chamber on the auxiliary receiver is communicated with oil extraction at this moment, and loculus is under pressure oil P effect, and main control valve piston auxiliary receiver piston 7 is followed guiding needle plug 10 to muscle-setting exercise, and this moment, valve port returned to initial closed state again; When the input reverse impulse, the stepper motor counterrotating, main control valve piston auxiliary receiver piston 7 is followed 10 motions of pin plug and is moved, and corresponding oil circuit is changed, and servomotor is done reversing motion; To stepper motor input continuous impulse, then servomotor continuous motion; Change the pulse frequency height, then change the servomotor moving speed.As seen the basic functional principle of present embodiment and second embodiment are basic identical, no longer repeat here.
Fig. 5 shows the 5th mode of execution of electro-control converter of the present invention, this electro-control converter and electro-control converter structure shown in Figure 1 are basic identical, difference is: screw rod and main control valve two center lines are by coaxial arrangement, there is not the bar 9 among Fig. 1 among Fig. 5, screw rod 5 is connected by bearing 16, locknut 14 and the minor diameter that main control valve piston 7 prolongs, working principle can be understood in conjunction with the explanatory note of Fig. 1, no longer repeats here.
Fig. 6 shows the 6th mode of execution of electro-control converter of the present invention, this electro-control converter and electro-control converter structure shown in Figure 2 are basic identical, difference is: screw rod 5 and main control valve two center lines are by coaxial arrangement, there is not the bar 9 among Fig. 2 among Fig. 6, screw rod 5 is connected by the pin plug 10 of bearing 13, locknut 14 and main control valve, working principle can be understood in conjunction with the explanatory note of Fig. 2, no longer discusses here.
Claims (22)
1, a kind of electro-control converter, comprise stepper motor, main control valve, feedback mechanism, described stepper motor (2) is that twin shaft is stretched, one end is provided with handwheel (1), the other end axle is provided with gear (3), it is characterized in that: feedback mechanism is a screw rod---the pair of nut formula, feedback nut (6) is enclosed within on the screw rod (5), feedback nut (6) is connected with feedback rod (15), gear (4) that screw rod (5) one ends are provided with and the engagement of the gear (3) on the stepper motor (2), screw rod (5) and main control valve two center lines are arranged in parallel, have between screw rod (5) and main control valve one can be with the bindiny mechanism that passes to the main control valve piston that moves axially of screw rod (5).
2, according to the described electro-control converter of claim 1, it is characterized in that: main control valve piston (7) the one end on employing equal diameter three convex shoulders four limits has the minor diameter of prolongation in the described main control valve.
3, according to the described electro-control converter of claim 1, it is characterized in that: described main control valve adopts the main control valve piston and the auxiliary receiver piston on equal diameter three convex shoulders four limits to be made of one (7), pin plug (10) directly puts in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston (7) is followed pin plug (10) motion.
4, according to the described electro-control converter of claim 1, it is characterized in that: screw rod (5) is that screw rod (5) is connected with bar (9) one ends with bindiny mechanism between main control valve, and bar (9) the other end is connected with the minor diameter that the main control valve piston prolongs.
5, according to the described electro-control converter of claim 1, it is characterized in that: screw rod (5) is that screw rod (5) is connected with bar (9) one ends with bindiny mechanism between main control valve, and the pin plug of bar (9) the other end and main control valve is connected.
6, according to any one described electro-control converter in the claim 1 to 5, it is characterized in that: connecting rod (9) is provided with fixed support.
7, according to any one described electro-control converter in the claim 1 to 5, it is characterized in that: the valve pocket of main control valve is processed with the throttling hydraulic fluid port on (8).
8, according to any one described electro-control converter in the claim 1 to 5, it is characterized in that: the screw rod of feedback mechanism---pair of nut adopts ball screw---pair of nut.
9, a kind of electro-control converter, comprise stepper motor, main control valve, feedback mechanism, described stepper motor (2) is that twin shaft is stretched, one end is provided with handwheel (1), the other end axle is provided with gear (3), it is characterized in that: feedback mechanism is a screw rod---the pair of nut formula, feedback nut (6) is enclosed within on the screw rod (5), feedback nut (6) is connected with feedback rod (15), gear (4) that screw rod (5) one ends are provided with and the engagement of the gear (3) on the stepper motor (2), main control valve is provided with by vertical, screw rod (5) and main control valve two centers are pressed several angle and are arranged, have between screw rod (5) and main control valve one can be with the bindiny mechanism that passes to main control valve that moves axially of screw rod (5).
10, according to the described electro-control converter of claim 9, it is characterized in that: adopt the main control valve piston (7) on equal diameter three convex shoulders four limits in the described main control valve, the one end has the minor diameter of prolongation, and is processed with tooth on the minor diameter that prolongs.
11, according to the described electro-control converter of claim 9, it is characterized in that: adopt the main control valve piston and the auxiliary receiver piston on equal diameter three convex shoulders four limits to be made of one (7) in the described main control valve, pin plug (10) one ends are processed with tooth, the other end directly puts in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston (7) is followed pin plug (10) motion and moved.
12, according to the described electro-control converter of claim 9, it is characterized in that: the bindiny mechanism between this screw rod (5) and the main control valve is that screw rod (5) one ends are connected with ratch (17) by bearing (16), locknut (14), ratch (17) with can be connected for the toothed shifting block (19) of center swing around O ', the tooth on the minor diameter of shifting block (19) and main control valve piston (7) prolongation is connected.
13, according to the described electro-control converter of claim 9, it is characterized in that: screw rod (5) is that screw rod (5) one ends are connected by bearing (16), locknut (14) and ratch (17) with bindiny mechanism between main control valve, between the pin plug (10) that is processed with tooth of ratch (17) and main control valve by being connected for the toothed shifting block (19) of center swing around O '.
14, according to any one described electro-control converter in the claim 9 to 13, it is characterized in that: valve pocket is processed with the throttling hydraulic fluid port on (8).
15, according to any one described electro-control converter in the claim 9 to 13, it is characterized in that: the screw rod of feedback mechanism---pair of nut adopts ball screw---pair of nut.
16, a kind of electro-control converter, comprise stepper motor, main control valve, feedback mechanism, described stepper motor (2) is that twin shaft is stretched, one end is provided with handwheel (1), the other end axle is provided with gear (3), it is characterized in that: feedback mechanism is a screw rod---the pair of nut formula, feedback nut (6) is enclosed within on the screw rod (5), feedback nut (6) is connected with feedback rod (15), gear (4) that screw rod (5) one ends are provided with and the engagement of the gear (3) on the stepper motor (2), screw rod (5) and main control valve two center lines are pressed coaxial line and are arranged, have between screw rod (5) and main control valve one can be with the bindiny mechanism that passes to main control valve that moves axially of screw rod (5).
17, according to the described electro-control converter of claim 16, it is characterized in that: adopt the main control valve piston (7) on equal diameter three convex shoulders four limits in the described main control valve, the one end has the minor diameter of prolongation.
18, according to the described electro-control converter of claim 16, it is characterized in that: adopt the main control valve piston and the auxiliary receiver piston on equal diameter three convex shoulders four limits to be made of one (7) in the described main control valve, pin plug (10) directly puts in the middle of the auxiliary receiver piston, and main control valve piston auxiliary receiver piston (7) is followed pin plug (10) motion and moved.
19, according to the described electro-control converter of claim 16, it is characterized in that: screw rod (5) is that screw rod (5) is connected by the minor diameter that bearing (16), locknut (14) and main control valve piston (7) prolong with bindiny mechanism between main control valve.
20, according to the described electro-control converter of claim 16, it is characterized in that: the pin plug (10) that described screw rod and bindiny mechanism between main control valve are screw rods (5) by bearing (13), locknut (14) and main control valve is connected.
21, according to any one described electro-control converter in the claim 16 to 20, it is characterized in that: valve pocket is processed with the throttling hydraulic fluid port on (8).
22, according to any one described electro-control converter in the claim 16 to 20, it is characterized in that: the screw rod of feedback mechanism---pair of nut adopts ball screw---pair of nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00106226A CN1266145A (en) | 2000-04-27 | 2000-04-27 | Electricity-liquid converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00106226A CN1266145A (en) | 2000-04-27 | 2000-04-27 | Electricity-liquid converter |
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| CN1266145A true CN1266145A (en) | 2000-09-13 |
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| CN00106226A Pending CN1266145A (en) | 2000-04-27 | 2000-04-27 | Electricity-liquid converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812761A (en) * | 2017-02-10 | 2017-06-09 | 武汉科技大学 | Crank block type feedback digital hydraulic cylinder |
| CN110274761A (en) * | 2019-07-24 | 2019-09-24 | 大唐水电科学技术研究院有限公司 | A kind of test method of hydraulic turbine electro-hydraulic control system servomotor reaction time constant |
-
2000
- 2000-04-27 CN CN00106226A patent/CN1266145A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812761A (en) * | 2017-02-10 | 2017-06-09 | 武汉科技大学 | Crank block type feedback digital hydraulic cylinder |
| CN110274761A (en) * | 2019-07-24 | 2019-09-24 | 大唐水电科学技术研究院有限公司 | A kind of test method of hydraulic turbine electro-hydraulic control system servomotor reaction time constant |
| CN110274761B (en) * | 2019-07-24 | 2023-03-28 | 大唐水电科学技术研究院有限公司 | Method for testing response time constant of servomotor of hydraulic turbine electrohydraulic adjusting system |
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