CN101392771A - Hydraulic double cylinder or multi-cylinder synchronous control system - Google Patents
Hydraulic double cylinder or multi-cylinder synchronous control system Download PDFInfo
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- CN101392771A CN101392771A CNA2008101953061A CN200810195306A CN101392771A CN 101392771 A CN101392771 A CN 101392771A CN A2008101953061 A CNA2008101953061 A CN A2008101953061A CN 200810195306 A CN200810195306 A CN 200810195306A CN 101392771 A CN101392771 A CN 101392771A
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Abstract
The invention relates to a synchronous control system with two hydraulic cylinders or a plurality of the hydraulic cylinders, which is combined with a hydraulic system and mainly comprises an eddy plate, an electro-hydraulic proportional speed control valve, hydraulic cylinder stroke detectors, and a PLC controller. The eddy plate with the electro-hydraulic proportional speed control valve is coupled in an oil feed path of the hydraulic system, and oil flows through the eddy plate with the electro-hydraulic proportional speed control valve and enters into hydraulic cylinders of the hydraulic system; and each hydraulic cylinder is provided with one hydraulic cylinder stroke detector which is in charge of inputting a stroke detection signal to the PLC controller, and the PLC controller inputs a proportional speed control signal to the electro-hydraulic proportional speed control valve according to the received stroke detection signal so as to control the proportional speed control valve to adjust the oil flow rate thereof. The control system can achieve the synchronous and precise running of the two hydraulic cylinders or the plurality of the hydraulic cylinders so as to improve the reliability and the safety of the running of the hydraulic system, and has the advantages of high synchronous control precision and fast response speed.
Description
Technical field
The present invention relates to a kind of control system in order to twin-tub or multi-cylinder synchronous operation in the realization hydraulic system.
Background technique
In the transmission system of hydraulic double cylinder or multi-cylinder, synchronous operation control system is of crucial importance for Security, the reliability of equipment operation.The synchronous deviation correction control system that is widely adopted at present is mostly for flow synchronization control type, because this synchronous deviation correction control system has simple structure, easy to control, advantage that cost is lower.And flow synchronization control type deviation-rectifying system commonly used is the bypass type system that drains the oil in the industry, there is the defective that speed of response is slow, control accuracy is not high in this system in control procedure, particularly for heavy load, long stroke, scheduling is frequent or underbalance hydraulic double cylinder of equipment itself or multi-cylinder system, it can not adapt to preferably.This deviation-rectifying system must be judged the motion speed of each oil cylinder earlier in control procedure, then corresponding oil cylinder is drained the oil, in the process of draining the oil, the flow of draining the oil is difficult to control, the amount of draining the oil does not reach or when surpassing aequum, the not enough problem of system's correction precision is caused in the capital, does not reach the effect of correction, and the speed of correction response simultaneously is also low.
Summary of the invention
The invention discloses the synchronous control system of twin-tub in a kind of hydraulic system or multi-cylinder, this system can realize the synchronous precision operation of twin-tub or multi-cylinder, improve hydraulic system reliability of operation and Security, overcome that the existing speed of response of the synchronous deviation-rectifying system of the widely used flow control of present twin-tub or multicylinder hydraulic system is slow, control accuracy is not high and can not be adapted to heavy load, long stroke, dispatch the frequent hydraulic double cylinder or the defective of multi-cylinder system.
The technical solution used in the present invention is: the synchronous control system of a kind of hydraulic double cylinder or multi-cylinder, and it combines with hydraulic system, mainly is made up of current plate, electrohydraulic proportional velocity regulating valve, hydraulic cylinder travel detection device and PLC controller; Insert the current plate that has electrohydraulic proportional velocity regulating valve in the oil-feed oil circuit of hydraulic system, fluid will enter the oil hydraulic cylinder of hydraulic system via the current plate that has electrohydraulic proportional velocity regulating valve; Each oil hydraulic cylinder is provided with the hydraulic cylinder travel detection device, this device is responsible for to PLC controller input travel testing signal, to electrohydraulic proportional velocity regulating valve input proportionality velocity modulation signal, the control ratio series flow control valve is regulated its fluid flow to the PLC controller according to the stroke detection signal that receives.
The invention has the beneficial effects as follows: this synchronous control system is arranged in hydraulic double cylinder or the multi-cylinder system, can realize the synchronous precision operation of twin-tub or multi-cylinder, hydraulic system reliability of operation and Security have been improved greatly, particularly for heavy load, long stroke, scheduling is frequent or underbalance hydraulic double cylinder of equipment itself or multi-cylinder system, it can play good synchronization control effect.This system architecture is simple, and is easily manufactured, the synchronous control accuracy height, and speed of response is fast, also can control the motion speed of whole hydraulic system simultaneously automatically.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation that synchronous control system of the present invention places hydraulic system.
1. current plates, 2. proportional velocity regulating valves, 3. hydraulic cylinder travel detection device 4.PLC controllers among the figure
Embodiment
As shown in Figure 1, synchronous control system of the present invention combines with hydraulic system, and control system mainly is made up of current plate 1, electrohydraulic proportional velocity regulating valve 2, hydraulic cylinder travel detection device 3 and PLC controller 4; Insert the current plate 1 that has electrohydraulic proportional velocity regulating valve 2 in the oil-feed oil circuit of hydraulic system, fluid will enter the oil hydraulic cylinder of hydraulic system via the current plate 1 that has electrohydraulic proportional velocity regulating valve 2; Each oil hydraulic cylinder is provided with hydraulic cylinder travel detection device 3, this device is responsible for to PLC controller 4 input travel testing signals, to electrohydraulic proportional velocity regulating valve 2 input proportionality velocity modulation signals, control ratio series flow control valve 2 is regulated its fluid flow to PLC controller 4 according to the stroke detection signal that receives.
Each is controlled the motion speed of oil hydraulic cylinder by the electrohydraulic proportional velocity regulating valve that is attached thereto.The PLC controller will be according to the stroke detection signal that receives to electrohydraulic proportional velocity regulating valve input proportionality velocity modulation signal, it is the correspondent voltage value, each correspondence of different magnitude of voltage the fluid flow value that an electrohydraulic proportional velocity regulating valve is controlled, so the PLC controller is by just realizing the motion speed control to each oil hydraulic cylinder to the different magnitude of voltage of electrohydraulic proportional velocity regulating valve input.
When carrying out synchronization control, the PLC controller can be to constant magnitude of voltage A of one of them electrohydraulic proportional velocity regulating valve input as benchmark, input voltage to other electrohydraulic proportional velocity regulating valves is variables A ± Kx, and wherein K is the coefficient that the ratio of reference voltage level and progressive error is set, and x is a progressive error.The PLC controller only needs according to the stroke detection signal that receives, make the magnitude of voltage that different traveled distance deviations can be calculated to be needed the input of other electrohydraulic proportional velocity regulating valves, thereby the control electrohydraulic proportional velocity regulating valve is regulated the flow of its control, realizes the closed loop synchronous operation of oil hydraulic cylinder.
Claims (1)
1. the synchronous control system of hydraulic double cylinder or multi-cylinder, it combines with hydraulic system, it is characterized in that: mainly be made up of current plate (1), electrohydraulic proportional velocity regulating valve (2), hydraulic cylinder travel detection device (3) and PLC controller (4); Insert the current plate (1) that has electrohydraulic proportional velocity regulating valve (2) in the oil-feed oil circuit of hydraulic system, fluid will enter the oil hydraulic cylinder of hydraulic system via the current plate that has electrohydraulic proportional velocity regulating valve (2) (1); Each oil hydraulic cylinder is provided with hydraulic cylinder travel detection device (3), this device is responsible for to PLC controller (4) input travel testing signal, to electrohydraulic proportional velocity regulating valve (2) input proportionality velocity modulation signal, control ratio series flow control valve (2) is regulated its fluid flow to PLC controller (4) according to the stroke detection signal that receives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101953061A CN101392771A (en) | 2008-10-13 | 2008-10-13 | Hydraulic double cylinder or multi-cylinder synchronous control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101953061A CN101392771A (en) | 2008-10-13 | 2008-10-13 | Hydraulic double cylinder or multi-cylinder synchronous control system |
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| Publication Number | Publication Date |
|---|---|
| CN101392771A true CN101392771A (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101953061A Pending CN101392771A (en) | 2008-10-13 | 2008-10-13 | Hydraulic double cylinder or multi-cylinder synchronous control system |
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| CN (1) | CN101392771A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907109A (en) * | 2010-08-11 | 2010-12-08 | 马鞍山钢铁股份有限公司 | Synchronous control device for hydraulic cylinder and control method thereof |
| CN102086893A (en) * | 2010-12-28 | 2011-06-08 | 深圳华强数码电影有限公司 | Multi-axis hydraulic synchronization control system, method and device |
| CN102628290A (en) * | 2012-04-18 | 2012-08-08 | 中联重科股份有限公司 | Grab bucket controller, control system and control method and engineering mechanical equipment |
| CN102628459A (en) * | 2012-04-12 | 2012-08-08 | 中联重科股份有限公司 | Multi-oil-cylinder synchronous control system and engineering vehicle |
| CN102744345A (en) * | 2012-07-19 | 2012-10-24 | 浙江大学 | Hydraulic system of buffering cylinder of forging manipulator |
| CN103089750A (en) * | 2012-12-10 | 2013-05-08 | 天水锻压机床(集团)有限公司 | Controller and method for controlling multiple oil cylinders by using programmable controller |
| CN104314058A (en) * | 2014-09-15 | 2015-01-28 | 山东科技大学 | Oil boom laying robot and hydraulic system of support equipment thereof, and control method thereof |
| CN106122140A (en) * | 2016-09-13 | 2016-11-16 | 湖北航天技术研究院总体设计所 | A kind of compensation type two-tank method hydraulic control method and system |
| CN106996401A (en) * | 2015-07-31 | 2017-08-01 | 湖北三江航天万山特种车辆有限公司 | A kind of synchronous Erecting System of double-cylinder hydraulic and its control method |
| CN109132938A (en) * | 2018-09-04 | 2019-01-04 | 长沙湘机械有限公司 | A kind of vertical garbage compressor lifting device |
| CN109267499A (en) * | 2018-04-24 | 2019-01-25 | 中铁三局集团广东建设工程有限公司 | The method of curved bridge stride pushing tow |
| CN111412201A (en) * | 2020-03-13 | 2020-07-14 | 南京理工大学 | Direct-connected laboratory bench flow control device |
| CN112664494A (en) * | 2020-12-04 | 2021-04-16 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filling forming hydraulic machine |
| CN114810705A (en) * | 2022-06-28 | 2022-07-29 | 江苏哈斯顿液压有限公司 | Hydraulic control system based on multi-cylinder synchronization |
| CN115217813A (en) * | 2022-09-19 | 2022-10-21 | 江苏恒立液压科技有限公司 | Leveling hydraulic system, hydraulic underwater leveling device and leveling control method |
-
2008
- 2008-10-13 CN CNA2008101953061A patent/CN101392771A/en active Pending
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907109B (en) * | 2010-08-11 | 2013-06-19 | 马鞍山钢铁股份有限公司 | Control method of synchronous control device for hydraulic cylinder |
| CN101907109A (en) * | 2010-08-11 | 2010-12-08 | 马鞍山钢铁股份有限公司 | Synchronous control device for hydraulic cylinder and control method thereof |
| CN102086893A (en) * | 2010-12-28 | 2011-06-08 | 深圳华强数码电影有限公司 | Multi-axis hydraulic synchronization control system, method and device |
| CN102086893B (en) * | 2010-12-28 | 2013-09-04 | 深圳华强数码电影有限公司 | Multi-axis hydraulic synchronization control system, method and device |
| CN102628459A (en) * | 2012-04-12 | 2012-08-08 | 中联重科股份有限公司 | Multi-oil-cylinder synchronous control system and engineering vehicle |
| CN102628459B (en) * | 2012-04-12 | 2015-06-17 | 中联重科股份有限公司 | Multi-oil-cylinder synchronous control system and engineering vehicle |
| CN102628290A (en) * | 2012-04-18 | 2012-08-08 | 中联重科股份有限公司 | Grab bucket controller, control system and control method and engineering mechanical equipment |
| CN102744345A (en) * | 2012-07-19 | 2012-10-24 | 浙江大学 | Hydraulic system of buffering cylinder of forging manipulator |
| CN102744345B (en) * | 2012-07-19 | 2014-06-11 | 浙江大学 | Hydraulic system of buffering cylinder of forging manipulator |
| CN103089750A (en) * | 2012-12-10 | 2013-05-08 | 天水锻压机床(集团)有限公司 | Controller and method for controlling multiple oil cylinders by using programmable controller |
| CN103089750B (en) * | 2012-12-10 | 2015-11-18 | 天水锻压机床(集团)有限公司 | Controller and the controlling method thereof of the control of many group oil cylinders is carried out with programmable controller |
| CN104314058A (en) * | 2014-09-15 | 2015-01-28 | 山东科技大学 | Oil boom laying robot and hydraulic system of support equipment thereof, and control method thereof |
| CN104314058B (en) * | 2014-09-15 | 2017-06-27 | 山东科技大学 | The hydraulic system and its control method of oil boom distributing robot and its corollary equipment |
| CN106996401B (en) * | 2015-07-31 | 2018-10-30 | 湖北三江航天万山特种车辆有限公司 | A kind of double-cylinder hydraulic synchronizes Erecting System and its control method |
| CN106996401A (en) * | 2015-07-31 | 2017-08-01 | 湖北三江航天万山特种车辆有限公司 | A kind of synchronous Erecting System of double-cylinder hydraulic and its control method |
| CN106122140A (en) * | 2016-09-13 | 2016-11-16 | 湖北航天技术研究院总体设计所 | A kind of compensation type two-tank method hydraulic control method and system |
| CN109267499A (en) * | 2018-04-24 | 2019-01-25 | 中铁三局集团广东建设工程有限公司 | The method of curved bridge stride pushing tow |
| CN109267499B (en) * | 2018-04-24 | 2022-07-26 | 中铁三局集团广东建设工程有限公司 | Walking pushing method for curved bridge |
| CN109132938A (en) * | 2018-09-04 | 2019-01-04 | 长沙湘机械有限公司 | A kind of vertical garbage compressor lifting device |
| CN109132938B (en) * | 2018-09-04 | 2023-06-16 | 湖南湘一环境科技有限公司 | Lifting device of vertical garbage compressor |
| CN111412201A (en) * | 2020-03-13 | 2020-07-14 | 南京理工大学 | Direct-connected laboratory bench flow control device |
| CN112664494A (en) * | 2020-12-04 | 2021-04-16 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filling forming hydraulic machine |
| CN112664494B (en) * | 2020-12-04 | 2023-05-23 | 天津天锻航空科技有限公司 | Hydraulic control system of double-acting liquid-filled forming hydraulic press |
| CN114810705A (en) * | 2022-06-28 | 2022-07-29 | 江苏哈斯顿液压有限公司 | Hydraulic control system based on multi-cylinder synchronization |
| CN114810705B (en) * | 2022-06-28 | 2022-09-16 | 江苏哈斯顿液压有限公司 | Hydraulic control system based on multi-cylinder synchronization |
| CN115217813A (en) * | 2022-09-19 | 2022-10-21 | 江苏恒立液压科技有限公司 | Leveling hydraulic system, hydraulic underwater leveling device and leveling control method |
| CN115217813B (en) * | 2022-09-19 | 2023-02-21 | 江苏恒立液压科技有限公司 | Leveling hydraulic system, hydraulic underwater leveling device and leveling control method |
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