CN205715021U - A kind of Electro-hydraulic Proportional Control hydraulic synchronous system - Google Patents
A kind of Electro-hydraulic Proportional Control hydraulic synchronous system Download PDFInfo
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- CN205715021U CN205715021U CN201620288566.3U CN201620288566U CN205715021U CN 205715021 U CN205715021 U CN 205715021U CN 201620288566 U CN201620288566 U CN 201620288566U CN 205715021 U CN205715021 U CN 205715021U
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Abstract
Description
技术领域 technical field
本实用新型涉及到一种带电液比例控制阀的液压同步系统。 The utility model relates to a hydraulic synchronous system with an electro-hydraulic proportional control valve.
背景技术 Background technique
在液压同步控制系统中，换向阀突然关闭和换向、液压缸和液压泵的突然停止和运动等原因都会使液压管路中的油液压力在惯性力的作用下剧增，造成压力冲击，使系统压力在短时间内快速升高。这种压力冲击会损坏敏感仪器和设备，使执行机构响应性能变差，并产生振动和噪声，还有可能会引起管道的爆裂。随着工业自动化水平的提高，许多液压系统要求油流的压力和流量能连续地或按比例地跟随控制信号而变化。若仅用普通的控制阀很难实现这种控制，用电液伺服阀组成伺服系统能实现这种控制，但伺服系统的成本高且维护困难。而比例控制阀能较好地满足生产中这类系统的要求。 In the hydraulic synchronous control system, the sudden closing and reversing of the reversing valve, the sudden stop and movement of the hydraulic cylinder and hydraulic pump will cause the oil pressure in the hydraulic pipeline to increase sharply under the action of inertial force, resulting in pressure shock , so that the system pressure rises rapidly in a short time. This pressure shock will damage sensitive instruments and equipment, deteriorate the response performance of the actuator, generate vibration and noise, and may cause bursting of the pipeline. With the improvement of industrial automation level, many hydraulic systems require that the pressure and flow of oil flow can be changed continuously or proportionally following the control signal. It is difficult to realize this kind of control only with ordinary control valves, and the servo system composed of electro-hydraulic servo valves can realize this kind of control, but the cost of the servo system is high and the maintenance is difficult. The proportional control valve can better meet the requirements of such systems in production.
电液比例阀是一种新型的电液控制元件，虽然它比液压伺服阀的频率响应低，但因其造价较低、抗污染能力强、性能良好，所以由它组成的同步闭环控制已大量用于系统频率响应适中而需要较高同步精度的场合。其控制精度取决于位移传感器的检测精度及比例阀的响应特性，理论上没有累积误差。 The electro-hydraulic proportional valve is a new type of electro-hydraulic control element. Although it has a lower frequency response than the hydraulic servo valve, it has a large number of synchronous closed-loop controls because of its low cost, strong anti-pollution ability, and good performance. It is used in occasions where the system frequency response is moderate and high synchronization accuracy is required. Its control accuracy depends on the detection accuracy of the displacement sensor and the response characteristics of the proportional valve, and there is no cumulative error in theory.
发明内容 Contents of the invention
本实用新型的目的是：提出一种具有控制精度高、抗污染能力强、性能良好的液压同步系统设计方案。 The purpose of the utility model is to propose a hydraulic synchronous system design scheme with high control precision, strong anti-pollution ability and good performance.
本实用新型的技术方案：一种电液比例阀控液压同步系统，包含液压泵、电磁阀、电液比例阀、溢流阀、节流阀、液压缸Ⅰ和Ⅱ、位移传感器、比例放大器，其特征在于主油泵1与溢流阀2和电磁阀3相连接，油液经过电磁阀3再经节流阀和进入液压缸Ⅰ和Ⅱ无杆腔，有杆腔回油经过电磁阀3、单向阀流回油箱；电液比例阀3'输入端与补油泵1'相连，另一端与液压缸的无杆腔相连；位移传感器一端与活塞杆相连，另一端通过比例放大器作用于电液比例阀3'的控制端。 The technical solution of the utility model: an electro-hydraulic proportional valve-controlled hydraulic synchronous system, including a hydraulic pump, a solenoid valve, an electro-hydraulic proportional valve, an overflow valve, a throttle valve, hydraulic cylinders I and II, a displacement sensor, and a proportional amplifier. It is characterized in that the main oil pump 1 is connected with the overflow valve 2 and the solenoid valve 3, the oil passes through the solenoid valve 3 and then passes through the throttle valve and enters the rodless chambers of hydraulic cylinders I and II, and the oil returned from the rod chamber passes through the solenoid valves 3, The one-way valve flows back to the oil tank; the input end of the electro-hydraulic proportional valve 3' is connected to the charge pump 1', and the other end is connected to the rodless chamber of the hydraulic cylinder; one end of the displacement sensor is connected to the piston rod, and the other end acts on the electro-hydraulic pump through a proportional amplifier. Control port of proportional valve 3'.
本实用新型的有益效果：通过一种电液比例阀控液压同步系统的设计，能够使液压系统高精度的跟随控制信号发生变化，有效提升同步精度。 The beneficial effects of the utility model: through the design of an electro-hydraulic proportional valve-controlled hydraulic synchronization system, the hydraulic system can follow the control signal with high precision to change, and the synchronization accuracy can be effectively improved.
附图说明 Description of drawings
图1为电液比例阀控液压同步系统原理图。 Figure 1 is a schematic diagram of the electro-hydraulic proportional valve-controlled hydraulic synchronization system.
图2为液压同步控制系统框图。 Figure 2 is a block diagram of the hydraulic synchronous control system.
具体实施方式 detailed description
电液比例同步系统原理图如图1所示，系统工作原理为：电液比例阀的Y口和Z口分别和两节流阀的出口并联后接液压缸Ⅰ和液压缸Ⅱ的无杆腔，电液比例方向阀油路便成为某一液压缸的另一个油路，通过补油使该液压缸的速度加快使两液压缸位移差逐渐为零。液压泵输出的压力油液，经节流阀进入液压缸，调节节流阀使两支路流量大致相同，使两液压缸位移和速度大致相同。当外负载发生变化时，两节流阀的流量不同，位移和速度就会不同。假如某一时刻液压缸Ⅰ的位移小于液压缸Ⅱ的位移，此时，位移传感器检测出两个液压缸的位移信号，并反馈给电液比例放大器，在其内部进行比较，将偏差信号放大后传给电液比例阀的左侧比例电磁铁，使阀的左位工作，则液压缸Ⅰ的进油腔通过比例阀与油泵相通（阀的E口封死，液压缸Ⅱ的油液将不能通过电液比例阀），使液压缸Ⅰ的速度加快，使两液压缸位移相同，即实现位移同步。 The schematic diagram of the electro-hydraulic proportional synchronization system is shown in Figure 1. The working principle of the system is: the Y port and Z port of the electro-hydraulic proportional valve are respectively connected in parallel with the outlets of the two throttle valves, and then connected to the rodless chambers of hydraulic cylinders I and II. , the electro-hydraulic proportional directional valve oil circuit becomes another oil circuit of a certain hydraulic cylinder, and the speed of the hydraulic cylinder is accelerated by adding oil so that the displacement difference between the two hydraulic cylinders gradually becomes zero. The pressure oil output by the hydraulic pump enters the hydraulic cylinder through the throttle valve, and the throttle valve is adjusted to make the flow of the two branches roughly the same, so that the displacement and speed of the two hydraulic cylinders are roughly the same. When the external load changes, the flow rate of the two throttle valves is different, and the displacement and speed will be different. If the displacement of hydraulic cylinder I is smaller than that of hydraulic cylinder II at a certain moment, at this time, the displacement sensor detects the displacement signals of the two hydraulic cylinders and feeds them back to the electro-hydraulic proportional amplifier, which compares them internally and amplifies the deviation signal Pass it to the left proportional electromagnet of the electro-hydraulic proportional valve to make the left position of the valve work, then the oil inlet chamber of the hydraulic cylinder I communicates with the oil pump through the proportional valve (the E port of the valve is sealed, and the oil in the hydraulic cylinder II will not be able to Through the electro-hydraulic proportional valve), the speed of the hydraulic cylinder I is accelerated, so that the displacement of the two hydraulic cylinders is the same, that is, the displacement synchronization is realized.
其同步控制系统框图如图2所示，位移传感器将检测到的输出位移信号在放大器内部进行比较，其偏差通过放大器放大后作用在比例阀的阀芯上，通过调节阀芯的位移，来改变阀的开口度，从而改变进入液压缸的流量，减小液压缸位移误差，使两液压缸趋于同步。 The block diagram of its synchronous control system is shown in Figure 2. The displacement sensor compares the detected output displacement signal inside the amplifier, and the deviation is amplified by the amplifier and acts on the spool of the proportional valve. By adjusting the displacement of the spool, it changes The opening degree of the valve can change the flow into the hydraulic cylinder, reduce the displacement error of the hydraulic cylinder, and make the two hydraulic cylinders tend to be synchronized.
本实用新型的上述实例仅仅是为清楚地说明本实用新型所作的举例，而并非是对本实用新型的实施方式的限定。凡是属于本实用新型的技术方案所引伸出的显而易见的变化或变动仍处于本实用新型的保护范围之列。 The above examples of the utility model are only examples for clearly illustrating the utility model, rather than limiting the implementation of the utility model. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884833A (en) * | 2017-04-17 | 2017-06-23 | 泸州市长江液压件装备有限公司 | A kind of hydraulic servo synchronization system |
| CN107165874A (en) * | 2017-06-29 | 2017-09-15 | 中国重型机械研究院股份公司 | A kind of plate stretch machine stretching cylinder synchronous power save hydraulic composite control system |
| CN107185457A (en) * | 2017-06-21 | 2017-09-22 | 哈尔滨理工大学 | Biomass granule forming machine nip automatic regulating apparatus |
| CN107246418A (en) * | 2017-06-07 | 2017-10-13 | 哈尔滨理工大学 | Gap couples two-tank method cooperative motion device and its mutual interference decoupling compensation control method |
| CN107559266A (en) * | 2017-10-25 | 2018-01-09 | 北京富力通达科技有限公司 | A kind of servo-control mechanism device and synchronous control method in parallel |
| CN108180180A (en) * | 2017-12-13 | 2018-06-19 | 哈尔滨理工大学 | The flow-compensated synchronization onwards of double hydraulic cylinder erect device and its control method |
| CN109277124A (en) * | 2018-09-28 | 2019-01-29 | 太原理工大学 | Energy-saving extrusion equipment for civil engineering, construction waste treatment system and method |
| CN110407101A (en) * | 2019-07-25 | 2019-11-05 | 上海振华重工(集团)股份有限公司 | A kind of straddle carrier is to the synchronous double hydraulic system of case and its synchronous method |
| CN115405579A (en) * | 2022-08-01 | 2022-11-29 | 中联重科建筑起重机械有限责任公司 | Synchronous jacking hydraulic system and tower crane |
-
2016
- 2016-04-09 CN CN201620288566.3U patent/CN205715021U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884833A (en) * | 2017-04-17 | 2017-06-23 | 泸州市长江液压件装备有限公司 | A kind of hydraulic servo synchronization system |
| CN107246418A (en) * | 2017-06-07 | 2017-10-13 | 哈尔滨理工大学 | Gap couples two-tank method cooperative motion device and its mutual interference decoupling compensation control method |
| CN107185457A (en) * | 2017-06-21 | 2017-09-22 | 哈尔滨理工大学 | Biomass granule forming machine nip automatic regulating apparatus |
| CN107165874A (en) * | 2017-06-29 | 2017-09-15 | 中国重型机械研究院股份公司 | A kind of plate stretch machine stretching cylinder synchronous power save hydraulic composite control system |
| CN107559266A (en) * | 2017-10-25 | 2018-01-09 | 北京富力通达科技有限公司 | A kind of servo-control mechanism device and synchronous control method in parallel |
| CN107559266B (en) * | 2017-10-25 | 2023-12-15 | 北京富力通达科技有限公司 | Servo control mechanism device and parallel synchronization control method |
| CN108180180A (en) * | 2017-12-13 | 2018-06-19 | 哈尔滨理工大学 | The flow-compensated synchronization onwards of double hydraulic cylinder erect device and its control method |
| CN109277124A (en) * | 2018-09-28 | 2019-01-29 | 太原理工大学 | Energy-saving extrusion equipment for civil engineering, construction waste treatment system and method |
| CN110407101A (en) * | 2019-07-25 | 2019-11-05 | 上海振华重工(集团)股份有限公司 | A kind of straddle carrier is to the synchronous double hydraulic system of case and its synchronous method |
| CN115405579A (en) * | 2022-08-01 | 2022-11-29 | 中联重科建筑起重机械有限责任公司 | Synchronous jacking hydraulic system and tower crane |
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