CN104074818A - Direct valve feedback hydraulic synchronization device - Google Patents
Direct valve feedback hydraulic synchronization device Download PDFInfo
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- CN104074818A CN104074818A CN201410319584.9A CN201410319584A CN104074818A CN 104074818 A CN104074818 A CN 104074818A CN 201410319584 A CN201410319584 A CN 201410319584A CN 104074818 A CN104074818 A CN 104074818A
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Abstract
The invention provides a direct valve feedback hydraulic synchronization device. The direct valve feedback hydraulic synchronization device comprises a plurality of hydraulic servo control systems; a hydraulic cylinder feedback signal of every system directly acts on a digital hydraulic valve and does not feed back to a controller; the same number of pulses are sent to an instruction motor of every system with the same pulse frequency through the controller; valve cores of the digital hydraulic valves of the hydraulic servo control systems are opened with the same opening to enable a hydraulic cylinder of every hydraulic servo control system to move; a plus signal which is proportional to the displacement of every hydraulic cylinder is output to be sent to a feedback motor of the corresponding hydraulic servo control system to close a valve opening which is opened through the corresponding instruction motor when the hydraulic cylinder moves. The openings of the valve openings are equal to each other and accordingly every feedback motor needs to accept the same pulse to close the same opening of valve opening to enable the corresponding hydraulic cylinder to stop moving, namely that the displacement of the hydraulic cylinders needs to be equal to each other, and accordingly the purpose of the synchronization of the plurality of hydraulic cylinders is achieved.
Description
Technical field
The present invention relates to hydraulic control technology, particularly a kind of displacement signal directly feeds back to the hydraulic synchro on Digital Hydraulic Valve.
Background technique
Hydraulic synchronization technology is widely used in control and the manufacture process of the technical products such as bender, Pressesforging and hoist.Hydraulic synchronization is the difficult problem in hydraulic control field, uses common hydraulic control mode to be difficult to ensure the precision of multi-cylinder synchronous.Current, in order to make multiple oil hydraulic cylinders have higher synchronization accuracy, a kind of mode is the rigidity that connects firmly mechanism by improving rigidity, forces to make multiple hydraulic cylinder synchronous actions; Not only cost is high in this way for profit, and synchronization accuracy is difficult to meet actual demand.Another kind of mode is respectively the hydraulic oil of controlling oil hydraulic cylinder to be supplied with by high-precision electrohydraulic control (or Proportional valve), accurately controls the action of each oil hydraulic cylinder by controlling hydraulic fluid flow rate, ensures the synchronization accuracy of multiple oil hydraulic cylinder actions; This mode will depend on electrohydraulic control (or Proportional valve) to the control of hydraulic fluid flow rate precision, or it is too high to control cost, or synchronization accuracy is difficult to meet actual demand.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of directly valve feedback hydraulic synchronizer, device comprises the direct valve feedback hydraulic servo control system of many covers, the oil hydraulic cylinder feedback signal of every cover Hydrauservo System acts directly on Digital Hydraulic Valve, instead of feed back to controller, controller sends the pulse of equal number to the instruction motor of the above-mentioned Hydrauservo System of every cover with identical pulse frequency, the digital hydraulic valve core of every cover Hydrauservo System is opened identical aperture, make the hydraulic cylinder of every cover Hydrauservo System, the valve port that when hydraulic cylinder, output pulse signal proportional to oil hydraulic cylinder displacement sends to the feedback motor out code motor of every cover Hydrauservo System to open, because the aperture of each valve port equates, so feedback motor must accept identical pulse and just can cut out the valve port of identical aperture and make oil hydraulic cylinder stop motion, the i.e. displacement of an oil hydraulic cylinder must be identical, thereby reach the object of many hydraulic cylinder synchronous.
The present invention is specifically achieved through the following technical solutions:
A kind of directly valve feedback hydraulic synchronizer, is characterized in that, comprise the hydraulic servo control system that controller and controller connect, hydraulic servo control system is made up of Digital Hydraulic Valve and oil hydraulic cylinder:
Digital Hydraulic Valve comprises valve body, spool, instruction motor and feedback motor, described spool is arranged on the inside of valve body, instruction motor and feedback motor are installed respectively in described valve body two ends, described instruction motor is connected to one end of spool by changing pair, for receiving command pulse and according to rotating speed and the rotation angle of command pulse SC sigmal control instruction motor; Described feedback motor is by the secondary the other end that connects spool of conversion, for receiving feedback pulse signal and according to rotating speed and the angle of feedback pulse SC sigmal control feedback motor, making the direction of rotation of the sense of rotation and instruction motor that feeds back motor;
Described oil hydraulic cylinder comprises cylinder body, box type piston, rotating coder and screw mandrel, described screw mandrel is placed in the inside of cylinder body, and screw mandrel is connected with piston by feed screw nut, described rotating coder is arranged on one end of described cylinder body, the rotating shaft of described rotating coder is connected with leading screw, and described rotating coder connects described feedback motor; Described cylinder body one side is provided with two oil hydraulic cylinder interface channels, and described Digital Hydraulic Valve, by pipeline connecting fluid cylinder pressure interface channel, provides the movement of hydraulic pressure difference control piston to the box type piston both sides of oil hydraulic cylinder.
Further, described hydraulic servo control system has two covers at least, and controller connects respectively the instruction motor of every cover hydraulic servo control system, and described controller is given the instruction motor same frequency of every cover hydraulic servo control system and the pulse signal of equal number.
Further, described valve body both sides are respectively arranged with by being communicated with valve inner to outside passage, this passage forms the outside oil circuit of valve body, comprise oil inlet passage, drainback passage and control channel, described valve body and described spool form three position four-way directional control valve, and described control channel connects described oil hydraulic cylinder interface channel;
Further, described spool both sides are respectively equipped with two flanged structures, described flanged structure contact valve interior wall, drainback passage and control channel are respectively two, and be arranged on the not homonymy of valve body, oil inlet passage is communicated with and carries out oil-feed work with control channel respectively, and drainback passage is communicated with and carries out oil return work with oil hydraulic cylinder interface channel respectively;
Further, the width of described flanged structure is more than or equal to the width of control channel, oil inlet passage, the arbitrary access portal of drainback passage three, distance between distance three between distance, oil inlet passage and drainback passage between distance, control channel between flanged structure is equal, and the length of box type piston is greater than the distance between described oil hydraulic cylinder interface channel;
Further, the opposite direction that the direction and instruction motor-driven valve mandrel that described feedback motor-driven valve mandrel rotates rotates;
Further, described feedback motor is stepper motor;
Further, described instruction motor is stepper motor.
Further, the reponse system of described leading screw encoder composition also can be replaced by grating scale, magnetic railings ruler or other displacement transducer.
The beneficial effect that the present invention produces is: middle controller of the present invention sends the pistons that identical pulse signal can realize the oil hydraulic cylinder in many cover hydraulic servo control systems to many cover hydraulic servo control systems identical displacement, thereby reaches the object of many hydraulic cylinder synchronous.The present invention is high to the control of hydraulic cylinder synchronous precision, and cost is low.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
A kind of directly valve feedback hydraulic synchronizer as shown in Figure 1, comprise the hydraulic servo control system that controller 1 and controller connect, hydraulic servo control system has two covers at least, and controller connects respectively the instruction motor 23 of every cover hydraulic servo control system, described controller (1) is given the instruction motor same frequency of every cover hydraulic servo control system and the pulse signal of equal number.
Hydraulic servo control system is made up of Digital Hydraulic Valve 2 and oil hydraulic cylinder 3:
Digital Hydraulic Valve 2 comprises valve body 21, spool 24, instruction motor 23 and feedback motor 22, described spool 24 is arranged on the inside of valve body 21, instruction motor 23 and feedback motor 22 are installed respectively in described valve body 21 two ends, described instruction motor 22 is by changing secondary 26 one end that are connected to spool 24, for receiving command pulse and according to rotating speed and the rotation angle of command pulse SC sigmal control instruction motor 23; Described feedback motor 22 connects the other end of spool 24 by conversion secondary 25, for receiving feedback pulse signal and according to rotating speed and the angle of feedback pulse SC sigmal control feedback motor 22, making the direction of rotation of the sense of rotation and instruction motor 23 that feeds back motor 22; Described oil hydraulic cylinder 3 comprises cylinder body 31, box type piston 32, rotating coder 34 and screw mandrel 33, described screw mandrel 33 is placed in the inside of cylinder body 31, and screw mandrel 33 is connected with piston 32 by feed screw nut 35, described rotating coder 34 is arranged on one end of described cylinder body 31, the rotating shaft of described rotating coder 34 is connected with leading screw 33, and described rotating coder 34 connects described feedback motor 22; Described cylinder body 31 1 sides are provided with two oil hydraulic cylinder interface channels 36, and described Digital Hydraulic Valve 2, by pipeline connecting fluid cylinder pressure interface channel 36, provides the movement of hydraulic pressure difference control piston to box type piston 32 both sides of oil hydraulic cylinder.
Spool 24 both sides are respectively equipped with two flanged structures, flanged structure contact valve interior wall, drainback passage 28 and control channel are respectively two, and be arranged on the not homonymy of valve body 21, oil inlet passage 27 is communicated with and carries out oil-feed work with control channel 29 respectively, and drainback passage 28 is communicated with and carries out oil return work with oil hydraulic cylinder interface channel 36 respectively.The width of flanged structure is more than or equal to the width of control channel 29, oil inlet passage 27, the arbitrary access portal of drainback passage 28 three, ensures that spool is completely to the sealing of each passage.Distance between distance three between distance, oil inlet passage 27 and drainback passage 28 between distance, control channel 29 between flanged structure equates, the length of box type piston 32 is greater than the distance between described oil hydraulic cylinder interface channel 36, ensure that spool can strictly cut apart each passage and realize different connected states, realized the object that the piston of oil hydraulic cylinder is driven.
This hydraulic synchro at least comprises above-mentioned hydraulic servo control systems more than two covers, controller is connected to each instruction motor, each feedback motor connects respectively the rotating coder of each correspondence, and difference corresponding pipeline connecting fluid cylinder pressure interface channel one by one, hydrovalve interface channel, the control unit of system is instruction motor 23 and feedback motor 22, this instruction motor and feedback motor are generally stepper motor, instruction motor 23 receives the control signal that controller sends, the Position of Hydraulic Cylinder pulse signal that feedback motor 22 sends for receiving rotating coder 34.The middle controller 1 of the present invention respectively instruction motor 23 of the each hydraulic servo control system to hydraulic synchronization control device sends the command pulse signal of identical frequency and quantity, instruction motor 23 rotarily drives spool 24 and turns over identical angle, make spool produce certain displacement formation opening by changing secondary 26, oil inlet passage 27 is communicated with and carries out oil-feed work with control channel 29 respectively, drainback passage 28 is communicated with and carries out the various states such as oil return work with control channel 29 respectively, so carry out on the box type piston of oil hydraulic cylinder, mobile.In the time that box type piston moves up and down, also drive the feed screw nut who links together with it to move up and down, thereby screw mandrel 33 is rotated, the rotating coder 34 in screw mandrel one end produces pulse signal, this pulse signal is sent to feedback motor 22, and feedback motor 22 is received this pulse signal and rotated.The motor-driven opposite direction of direction and instruction that feedback motor 22 actuating valve mandrels rotate, in the time that the quantity of feedback pulse and the quantity of control impuls equate, digital valve is closed oil hydraulic cylinder stop motion.Because the pulse frequency and the number of pulses that send to every cover hydraulic servo control system are all identical, so must feeding back the pulse signal of equal number, every cover system just can close Digital Hydraulic Valve, and feedback pulse number is directly proportional to hydraulic cylinder travel, therefore the displacement of each oil hydraulic cylinder is identical, thereby realize hydraulic synchronization.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a direct valve feedback hydraulic synchronizer, it is characterized in that, comprise the hydraulic servo control system that controller (1) and controller connect, hydraulic servo control system is made up of Digital Hydraulic Valve (2) and oil hydraulic cylinder (3):
Digital Hydraulic Valve (2) comprises valve body (21), spool (24), instruction motor (23) and feedback motor (22), described spool (24) is arranged on the inside of valve body (21), instruction motor (23) and feedback motor (22) are installed respectively in described valve body (21) two ends, described instruction motor (22) is connected to one end of spool (24) by conversion secondary (26), for receiving command pulse and according to rotating speed and the rotation angle of command pulse SC sigmal control instruction motor (23); Described feedback motor (22) connects the other end of spool (24) by conversion secondary (25), be used for receiving feedback pulse signal and according to rotating speed and the angle of feedback pulse SC sigmal control feedback motor (22), make the direction of rotation of the sense of rotation and instruction motor (23) that feeds back motor (22);
Described oil hydraulic cylinder (3) comprises cylinder body (31), box type piston (32), rotating coder (34) and screw mandrel (33), described screw mandrel (33) is placed in the inside of cylinder body (31), and screw mandrel (33) is connected with piston (32) by feed screw nut (35), described rotating coder (34) is arranged on one end of described cylinder body (31), the rotating shaft of described rotating coder (34) is connected with leading screw (33), and described rotating coder (34) connects described feedback motor (22); Described cylinder body (31) one sides are provided with two oil hydraulic cylinder interface channels (36), described Digital Hydraulic Valve (2) is by pipeline connecting fluid cylinder pressure interface channel (36), and box type piston (32) both sides to oil hydraulic cylinder provide the movement of hydraulic pressure difference control piston.
2. the direct valve feedback hydraulic of one as claimed in claim 1 synchronizer, it is characterized in that, described hydraulic servo control system has two covers at least, and controller (1) connects respectively the instruction motor (23) of every cover hydraulic servo control system, described controller (1) is given the instruction motor same frequency of every cover hydraulic servo control system and the pulse signal of equal number.
3. the direct valve feedback hydraulic of one as claimed in claim 1 or 2 synchronizer, it is characterized in that, described valve body (21) both sides are respectively arranged with by being communicated with valve inner to outside passage, this passage forms the outside oil circuit of valve body, comprise oil inlet passage (27), drainback passage (28) and control channel (29), described valve body and described spool form three position four-way directional control valve, and described control channel (29) connects described oil hydraulic cylinder interface channel (36).
4. the direct valve feedback hydraulic of one as claimed in claim 3 synchronizer, it is characterized in that, described spool (24) both sides are respectively equipped with two flanged structures, described flanged structure contact valve interior wall, drainback passage (28) and control channel (29) are respectively two, and be arranged on the not homonymy of valve body, oil inlet passage (27) respectively and control channel (29) be communicated with and carry out oil-feed work, drainback passage (28) is communicated with and carries out oil return work with oil hydraulic cylinder interface channel (36) respectively.
5. the direct valve feedback hydraulic of one as claimed in claim 4 synchronizer, it is characterized in that, the width of described flanged structure is more than or equal to the width of control channel (29), oil inlet passage (27), the arbitrary access portal of drainback passage (28) three, distance between distance three between distance, oil inlet passage (27) and drainback passage (28) between distance, control channel (29) between flanged structure is equal, and the length of box type piston (32) is greater than the distance between described oil hydraulic cylinder interface channel (36).
6. the direct valve feedback hydraulic of one as claimed in claim 1 synchronizer, is characterized in that, the opposite direction that direction and instruction motor (23) the actuating valve mandrel that described feedback motor (22) actuating valve mandrel rotates rotates.
7. the direct valve feedback hydraulic of one as claimed in claim 1 synchronizer, is characterized in that, described feedback motor (22) is stepper motor.
8. the direct valve feedback hydraulic of one as claimed in claim 1 synchronizer, is characterized in that, described instruction motor (23) is stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319584.9A CN104074818A (en) | 2014-07-07 | 2014-07-07 | Direct valve feedback hydraulic synchronization device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319584.9A CN104074818A (en) | 2014-07-07 | 2014-07-07 | Direct valve feedback hydraulic synchronization device |
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| CN104074818A true CN104074818A (en) | 2014-10-01 |
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| CN201410319584.9A Pending CN104074818A (en) | 2014-07-07 | 2014-07-07 | Direct valve feedback hydraulic synchronization device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529446A (en) * | 2019-09-05 | 2019-12-03 | 燕山大学 | A kind of digital control flow inserted valve and its control method |
| CN110594475A (en) * | 2018-06-12 | 2019-12-20 | 北京华德液压工业集团有限责任公司 | Motor-driven digital valve |
| WO2020082320A1 (en) * | 2018-10-26 | 2020-04-30 | 武汉海力威机电科技有限公司 | Automatic transporter leveling device employing hydraulic servo |
| CN112598959A (en) * | 2021-01-06 | 2021-04-02 | 中国民航大学 | Airplane steering engine load simulator based on electro-hydraulic digital valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6189432B1 (en) * | 1999-03-12 | 2001-02-20 | Hunter Engineering Company | Automotive lift hydraulic fluid control circuit |
| CN101839258A (en) * | 2009-03-18 | 2010-09-22 | 宋家骏 | Servo hydraulic transmission mechanism |
| CN102889254A (en) * | 2011-07-22 | 2013-01-23 | 杨世祥 | Dual-drive servo valve and control method thereof |
| CN103148035A (en) * | 2013-03-13 | 2013-06-12 | 武汉海力威机电科技有限公司 | Directly-fed digital hydraulic valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN203948361U (en) * | 2014-07-07 | 2014-11-19 | 武汉海力威机电科技有限公司 | A kind of directly valve feedback hydraulic synchronizer |
-
2014
- 2014-07-07 CN CN201410319584.9A patent/CN104074818A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6189432B1 (en) * | 1999-03-12 | 2001-02-20 | Hunter Engineering Company | Automotive lift hydraulic fluid control circuit |
| CN101839258A (en) * | 2009-03-18 | 2010-09-22 | 宋家骏 | Servo hydraulic transmission mechanism |
| CN102889254A (en) * | 2011-07-22 | 2013-01-23 | 杨世祥 | Dual-drive servo valve and control method thereof |
| CN103148035A (en) * | 2013-03-13 | 2013-06-12 | 武汉海力威机电科技有限公司 | Directly-fed digital hydraulic valve |
| CN103775441A (en) * | 2014-01-26 | 2014-05-07 | 天津大学 | Electrical feedback large-scale servo hydraulic cylinder driven by double motors |
| CN203948361U (en) * | 2014-07-07 | 2014-11-19 | 武汉海力威机电科技有限公司 | A kind of directly valve feedback hydraulic synchronizer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594475A (en) * | 2018-06-12 | 2019-12-20 | 北京华德液压工业集团有限责任公司 | Motor-driven digital valve |
| WO2020082320A1 (en) * | 2018-10-26 | 2020-04-30 | 武汉海力威机电科技有限公司 | Automatic transporter leveling device employing hydraulic servo |
| CN110529446A (en) * | 2019-09-05 | 2019-12-03 | 燕山大学 | A kind of digital control flow inserted valve and its control method |
| CN112598959A (en) * | 2021-01-06 | 2021-04-02 | 中国民航大学 | Airplane steering engine load simulator based on electro-hydraulic digital valve |
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