CN103452929A - Hydraulic synchronous control mechanism with compensating function - Google Patents
Hydraulic synchronous control mechanism with compensating function Download PDFInfo
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- CN103452929A CN103452929A CN2013103936606A CN201310393660A CN103452929A CN 103452929 A CN103452929 A CN 103452929A CN 2013103936606 A CN2013103936606 A CN 2013103936606A CN 201310393660 A CN201310393660 A CN 201310393660A CN 103452929 A CN103452929 A CN 103452929A
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Abstract
The invention relates to a hydraulic synchronous control mechanism with a compensation function. The hydraulic synchronous control mechanism with the compensation function is characterized by comprising a main operating loop and a compensation loop; the main operating loop comprises an oil cylinder, the oil cylinder is provided with a first hydraulic control one-way valve, a first overflow valve and a displacement sensor, and an oil inlet of the first hydraulic control one-way valve is connected with an oil opening of a control cavity of an electro-hydraulic reversing valve after sequentially passing through a first ball valve, a second hydraulic control one-way valve, a second overflow valve, a first one-way valve, a synchronous motor, a second throttling valve and a third throttling valve; the compensation loop is arranged between the first ball valve and the second hydraulic control one-way valve and comprises a first throttling valve, a third hydraulic control one-way valve and a first electromagnetic reversing valve, and the first throttling valve, the third hydraulic control one-way valve and the first electromagnetic reversing valve are sequentially connected. The hydraulic synchronous control mechanism with the compensation function which is disclosed by the invention has the characteristics that the structure is simple, the position of the oil cylinder is accurate, the synchronization precision is high, an electric control manner is simple, the use reliability is high, the safety of a system is remarkable, the maintenance is convenient and the like.
Description
Technical field
The present invention relates to a kind of control mechanism of the hydraulic synchronization with compensation.
Background technique
A plurality of hydraulic cylinder synchronous control gear in current domestic & overseas hydraulic technologies field mainly contain following several control mode:
1, each cylinder design has throttle valve to be controlled, and this control accuracy is lower, and synchronization accuracy is subject to the impact of oil cylinder load and oil temperature;
2, each cylinder design has series flow control valve to be controlled, and this control accuracy is general, and synchronization accuracy is subject to the impact of oil cylinder load and oil temperature less;
3, each cylinder design has syncmotor to be controlled, and this control accuracy is higher, but can produce integrating error in the process that is synchronized with the movement of oil cylinder, can only be after oil cylinder run to limit position, carry out error concealment by the hydraulic pressure installation of syncmotor;
4, the proportional valve of each cylinder design or servovalve are controlled, and this control accuracy is high, but require the turbidity test of system fluid higher, hydraulic pressure and electric controling mode complexity, and later maintenance cost is larger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of control mechanism of the hydraulic synchronization with compensation, to overcome the defect existed in prior art.
Technological scheme of the present invention is:
A kind of control mechanism of the hydraulic synchronization with compensation, is characterized in that: comprise main work loop and compensation circuit; Wherein,
Main work loop comprises the oil cylinder that is provided with the first Pilot operated check valve, the first relief valve and displacement transducer, and the filler opening of described the first Pilot operated check valve is connected with the control chamber hydraulic fluid port of electro-hydraulic reversing valve by the first ball valve, the second Pilot operated check valve, the second relief valve, the first one-way valve, syncmotor, the second throttle valve and the 3rd throttle valve successively;
The upper hydraulic fluid port of described oil cylinder is connected with the return opening of the first relief valve, and the upper hydraulic fluid port of oil cylinder is connected with the control chamber hydraulic fluid port of electro-hydraulic reversing valve by the control port of the first ball valve and the second Pilot operated check valve successively;
The control port of described the first Pilot operated check valve is connected with the control chamber hydraulic fluid port of the second solenoid directional control valve;
Compensation circuit, for being arranged between the first ball valve and the second Pilot operated check valve, comprises the first throttle valve, the 3rd Pilot operated check valve and the first solenoid directional control valve that connect successively;
The pressure hydraulic fluid port of described the first solenoid directional control valve, oil return hydraulic fluid port, the pressure hydraulic fluid port of electro-hydraulic reversing valve, oil return hydraulic fluid port, the pressure hydraulic fluid port of the second solenoid directional control valve, oil return hydraulic fluid port are connected with principal pressure hydraulic fluid port, main return opening by the second ball valve, the second one-way valve respectively.
Described the first solenoid directional control valve is the 3-position 4-way solenoid directional control valve.
Technique effect of the present invention is:
The control loop be comprised of syncmotor carries out basic synchronization control to a plurality of oil hydraulic cylinders; By setting up the compensation circuit of bypass, according to the feedback that detects the displacement transducer on oil cylinder, the oil cylinder of any generation error is carried out to repairing or draining is controlled, the positional value that this oil cylinder is met the demands.This hydraulic system is by setting up the unique hydraulic control circuits of the ingenious composition of element such as Pilot operated check valve, throttle valve, Pilot operated check valve, solenoid directional control valve, make any oil hydraulic cylinder not only can meet the status requirement of technique initialization, control of the position closed loop control gear of novel compensation circuit by this, realize accurately the desired Position of Hydraulic Cylinder control of given location signal, carry out reliable, work automatically, and electric needs are simply controlled to general electromagnet.
The present invention is simple in structure, oil cylinder position is accurate, synchronization accuracy is high, electric controling mode is simple, operational safety is high, security of system is given prominence to, be convenient to the characteristics such as maintenance.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference character is:
1-oil cylinder, the 2-the first Pilot operated check valve, the 3-the first relief valve, the 4-the first ball valve, the 5-the second Pilot operated check valve, the 6-the second relief valve, the 7-the first one-way valve, 8-syncmotor, 9-first throttle valve, the 10-the three Pilot operated check valve, the 11-the first solenoid directional control valve, the 12-the second throttle valve, the 13-the three throttle valve, 14-electro-hydraulic reversing valve, the 15-the four throttle valve, the 16-the second solenoid directional control valve, the 17-the second ball valve, the 18-the second one-way valve, 19-displacement transducer, the filler opening of A3-first Pilot operated check valve, the control chamber hydraulic fluid port of A1-electro-hydraulic reversing valve, the upper hydraulic fluid port of B3-oil cylinder, the control chamber hydraulic fluid port of B1-electro-hydraulic reversing valve, the control port of X-first Pilot operated check valve, the control chamber hydraulic fluid port of B2-second solenoid directional control valve, the pressure hydraulic fluid port of P-first solenoid directional control valve, the oil return hydraulic fluid port of T-first solenoid directional control valve, the pressure hydraulic fluid port of P1-electro-hydraulic reversing valve, the oil return hydraulic fluid port of T1-electro-hydraulic reversing valve, the pressure hydraulic fluid port of P2-second solenoid directional control valve, the oil return hydraulic fluid port of T2-second solenoid directional control valve, P0-principal pressure hydraulic fluid port, T0-main return opening.
Embodiment
The present invention relates to a kind of synchronizing control of the novel hydraulic with compensation in the hydraulics field, particularly about the novel hydraulic synchronizing control of a plurality of hydraulic cylinder synchronous.
Referring to Fig. 1, the concrete structure of a kind of control mechanism of the hydraulic synchronization with compensation the present invention relates to is:
Comprise main work loop and compensation circuit; Wherein,
Main work loop comprises the oil cylinder 1 that is provided with the first Pilot operated check valve 2, the first relief valve 3 and displacement transducer 19, and the filler opening A3 of described the first Pilot operated check valve 2 is connected with the control chamber hydraulic fluid port A1 of electro-hydraulic reversing valve 14 with the 3rd throttle valve 13 by the first ball valve 4, the second Pilot operated check valve 5, the second relief valve 6, the first one-way valve 7, syncmotor 8, the second throttle valve 12 successively;
The upper hydraulic fluid port B3 of described oil cylinder 1 is connected with the return opening of the first relief valve 3, and the upper hydraulic fluid port B3 of oil cylinder 1 is connected with the control chamber hydraulic fluid port B1 of electro-hydraulic reversing valve 14 by the control port of the first ball valve 4 and the second Pilot operated check valve 5 successively;
The control port X of described the first Pilot operated check valve 2 is connected with the control chamber hydraulic fluid port B2 of the second solenoid directional control valve 16; A plurality of oil hydraulic cylinders are carried out to basic synchronization control;
Compensation circuit, for being arranged between the first ball valve 4 and the second Pilot operated check valve 5, comprises the first throttle valve 9, the 3rd Pilot operated check valve 10 and the first solenoid directional control valve 11 that connect successively; According to the feedback that detects the displacement transducer 19 on oil cylinder 1, the oil cylinder of any generation error is carried out to repairing or draining is controlled, the positional value that this oil cylinder is met the demands;
The pressure hydraulic fluid port P of described the first solenoid directional control valve 11, oil return hydraulic fluid port T, the pressure hydraulic fluid port P1 of electro-hydraulic reversing valve 14, oil return hydraulic fluid port T1, the pressure hydraulic fluid port P2 of the second solenoid directional control valve 16, oil return hydraulic fluid port T2 are connected with principal pressure hydraulic fluid port P0, main oil return inlet T 0 by the second ball valve 17, the second one-way valve 18 respectively.
The first solenoid directional control valve 11 in the present invention is the 3-position 4-way solenoid directional control valve.
Relief valve 3, for the overload protection of oil hydraulic cylinder, prevents that oil hydraulic cylinder from damaging;
Pilot operated check valve 2 locking at an arbitrary position for oil cylinder;
When Pilot operated check valve 5 is worked for the bypass compensation circuit by the reverse flow of fluid;
Overflow synchronization control when relief valve 6 arrives limit position for hydraulic cylinder;
Repairing synchronization control when relief valve 6 arrives limit position for hydraulic cylinder;
Syncmotor 8 is for the synchronization control of oil hydraulic cylinder;
Throttle valve 12 is controlled for the speed of stretching out of oil hydraulic cylinder;
Electro-hydraulic reversing valve 14 is controlled for the direction of oil hydraulic cylinder.
The present invention is when work, and the main work loop formed by electro-hydraulic reversing valve 14, throttle valve 12, throttle valve 13, syncmotor 8, Pilot operated check valve 5, Pilot operated check valve 2, solenoid directional control valve 16 is controlled the lifting action of oil cylinder; When deviation appears in the position of oil cylinder, the compensation circuit formed by solenoid directional control valve 11, Pilot operated check valve 10, throttle valve 9, solenoid directional control valve 16 compensates control to the positional deviation of oil cylinder.
When oil cylinder 1 rising and down maneuver, electro-hydraulic reversing valve 14 energisings, solenoid directional control valve 16 energisings, open Pilot operated check valve 2, and oil cylinder can be realized rising and down maneuver.In the movement process of oil cylinder 1, system is according to the oil cylinder position of setting, electric position closed loop control gear detects the positional value of the displacement transducer 19 on cylinder apparatus 1, when the position of certain oil cylinder because the control accuracy of syncmotor affects the position of this oil cylinder can not be with other oil cylinder synchronization motions the time, control panel is controlled the solenoid directional control valve 11 of the compensation circuit that this oil cylinder is corresponding in real time automatically, realizes the auto-compensation that this oil cylinder position is controlled.When this oil cylinder position is high than other oil cylinders, the electromagnet a that electrical system is controlled the solenoid directional control valve 11 of the compensation circuit that this oil cylinder is corresponding automatically obtains electric, realize that the draining of this oil cylinder controls, make the position of this oil cylinder can automatically drop to this compensation circuit when identical with other oil cylinder position and stop action; When this oil cylinder position is low than other oil cylinders, the electromagnet b that electrical system is controlled the solenoid directional control valve 11 of the compensation circuit that this oil cylinder is corresponding automatically obtains electric, realize the repairing control of this oil cylinder, make the position of this oil cylinder can automatic-ascending when identical with other oil cylinder position this compensation circuit stop action, thereby the oil cylinder position requirement of assurance technological requirement.
When oil cylinder stops at some positions for a long time, due to the internal leakage of oil cylinder and the leakage of hydrovalve, oil cylinder there will be position to descend, now system is according to the oil cylinder position deviation requirement of setting, electric position closed loop control gear detects the positional value of the displacement transducer 19 on cylinder apparatus 1, when the positional deviation of certain oil cylinder surpasses required value, control panel is controlled the solenoid directional control valve 11 of the compensation circuit that this oil cylinder is corresponding in real time automatically, realizes the auto-compensation that this oil cylinder position is controlled.When this oil cylinder position is low than other oil cylinders, the electromagnet b that electrical system is controlled the solenoid directional control valve 11 of the compensation circuit that this oil cylinder is corresponding automatically obtains electric, realize the repairing control of this oil cylinder, make the position of this oil cylinder can automatic-ascending when identical with other oil cylinder position this compensation circuit stop action, thereby the oil cylinder position requirement of assurance technological requirement.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (2)
1. the control mechanism of the hydraulic synchronization with compensation, is characterized in that: comprise main work loop and compensation circuit; Wherein,
Main work loop comprises the oil cylinder (1) that is provided with the first Pilot operated check valve (2), the first relief valve (3) and displacement transducer (19), and the filler opening (A3) of described the first Pilot operated check valve (2) is connected with the control chamber hydraulic fluid port (A1) of electro-hydraulic reversing valve (14) by the first ball valve (4), the second Pilot operated check valve (5), the second relief valve (6), the first one-way valve (7), syncmotor (8), the second throttle valve (12) and the 3rd throttle valve (13) successively;
The upper hydraulic fluid port (B3) of described oil cylinder (1) is connected with the return opening of the first relief valve (3), and the upper hydraulic fluid port (B3) of oil cylinder (1) is connected with the control chamber hydraulic fluid port (B1) of electro-hydraulic reversing valve (14) by the control port of the first ball valve (4) and the second Pilot operated check valve (5) successively;
The control port (X) of described the first Pilot operated check valve (2) is connected with the control chamber hydraulic fluid port (B2) of the second solenoid directional control valve (16);
Compensation circuit, for being arranged between the first ball valve (4) and the second Pilot operated check valve (5), comprises the first throttle valve (9), the 3rd Pilot operated check valve (10) and the first solenoid directional control valve (11) that connect successively;
The pressure hydraulic fluid port (P) of described the first solenoid directional control valve (11), oil return hydraulic fluid port (T), the pressure hydraulic fluid port (P1) of electro-hydraulic reversing valve (14), oil return hydraulic fluid port (T1), the pressure hydraulic fluid port (P2) of the second solenoid directional control valve (16), oil return hydraulic fluid port (T2) are connected with principal pressure hydraulic fluid port (P0), main return opening (T0) by the second ball valve (17), the second one-way valve (18) respectively.
2. the hydraulic synchronization control mechanism that band compensates according to claim 1, it is characterized in that: described the first solenoid directional control valve (11) is the 3-position 4-way solenoid directional control valve.
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| CN201310393660.6A CN103452929B (en) | 2013-09-03 | 2013-09-03 | A kind of hydraulic synchronization control mechanism with compensation |
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| CN201310393660.6A CN103452929B (en) | 2013-09-03 | 2013-09-03 | A kind of hydraulic synchronization control mechanism with compensation |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930002A (en) * | 2015-06-12 | 2015-09-23 | 中国建筑股份有限公司 | Hydraulic synchronous motor type hydraulic control console |
| CN105020192A (en) * | 2015-07-30 | 2015-11-04 | 中国重型机械研究院股份公司 | Novel steel ladle lifting synchronous control system |
| CN105840566A (en) * | 2015-01-27 | 2016-08-10 | 罗伯特·博世有限公司 | Hydraulic control device for supplying pressure medium to at least two hydraulic loads |
| CN107575425A (en) * | 2017-10-19 | 2018-01-12 | 东北林业大学 | Multi-daylight press Hydrauservo System with synchronizing speed, position and Stress control |
| CN109578353A (en) * | 2018-11-29 | 2019-04-05 | 重庆邮电大学 | A kind of synchronous error automatic clear hydraulic control circuit |
| CN110578727A (en) * | 2019-09-25 | 2019-12-17 | 张家口凯航液压科技有限公司 | load-sensitive multi-cylinder synchronous control method |
| CN111802133A (en) * | 2020-06-30 | 2020-10-23 | 农业农村部南京农业机械化研究所 | Seeding and seedling raising machine |
| CN112483495A (en) * | 2020-12-09 | 2021-03-12 | 中国空气动力研究与发展中心高速空气动力研究所 | Synchronous motor based multi-cylinder synchronous open-loop control system and control method |
| CN114001061A (en) * | 2021-10-19 | 2022-02-01 | 中国重型机械研究院股份公司 | Hydraulic control method for lifting of tundish of adjustable slag line |
| CN114046282A (en) * | 2021-11-24 | 2022-02-15 | 天水锻压机床(集团)有限公司 | Multi-cylinder synchronous hydraulic control device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105840566A (en) * | 2015-01-27 | 2016-08-10 | 罗伯特·博世有限公司 | Hydraulic control device for supplying pressure medium to at least two hydraulic loads |
| CN105840566B (en) * | 2015-01-27 | 2020-04-14 | 罗伯特·博世有限公司 | Hydraulic control device for supplying at least two hydraulic consumers with a pressure medium |
| CN104930002A (en) * | 2015-06-12 | 2015-09-23 | 中国建筑股份有限公司 | Hydraulic synchronous motor type hydraulic control console |
| CN105020192A (en) * | 2015-07-30 | 2015-11-04 | 中国重型机械研究院股份公司 | Novel steel ladle lifting synchronous control system |
| CN107575425A (en) * | 2017-10-19 | 2018-01-12 | 东北林业大学 | Multi-daylight press Hydrauservo System with synchronizing speed, position and Stress control |
| CN109578353A (en) * | 2018-11-29 | 2019-04-05 | 重庆邮电大学 | A kind of synchronous error automatic clear hydraulic control circuit |
| CN109578353B (en) * | 2018-11-29 | 2020-07-31 | 重庆邮电大学 | Synchronous error automatic zero clearing hydraulic control loop |
| CN110578727A (en) * | 2019-09-25 | 2019-12-17 | 张家口凯航液压科技有限公司 | load-sensitive multi-cylinder synchronous control method |
| CN111802133A (en) * | 2020-06-30 | 2020-10-23 | 农业农村部南京农业机械化研究所 | Seeding and seedling raising machine |
| CN112483495A (en) * | 2020-12-09 | 2021-03-12 | 中国空气动力研究与发展中心高速空气动力研究所 | Synchronous motor based multi-cylinder synchronous open-loop control system and control method |
| CN114001061A (en) * | 2021-10-19 | 2022-02-01 | 中国重型机械研究院股份公司 | Hydraulic control method for lifting of tundish of adjustable slag line |
| CN114046282A (en) * | 2021-11-24 | 2022-02-15 | 天水锻压机床(集团)有限公司 | Multi-cylinder synchronous hydraulic control device |
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