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1、HV8052316 打包机液压系统的改进摘要:文章通过对HV8052316 打包机液压系统(预压部分) 的分析,阐述了作者的观点,并对原液压系关键词:HV8052316 打包机;液压系统;二通插装阀HV805 - 316 打包机针对化纤厂的后处理捆抱作业特点而开发研制的。该设备在使用过程中与其他老型号的打包机比较,由于应用了二通插座装阀控制技术,与传统液压阀相比,具有重量轻、体积小、动作速度快、易于集成等优点,时间节拍、工作效率与可靠性大大提高,颇受用户方的好评。是目前该行业中使用打包设备的主流产品。但也存在一些问题,最主要方面是预压液压系统,预压缸到下限位时保压保不住,预压缸空回升时,预压液
2、压系统压力过高,电机长期过载而烧损。此类情况包括进口设备在使用时也时有发生。本文就此问题对该设备的预压液压控制系统作了一些分析及改进设计。为该机原预压液压系统。预压液压系统泵源采用叶片泵。该回路控制部分采用二通插装阀组,具有限位、卸载、换向功能。它还可以通过对电磁阀的电气控制,控制液压缸快速(差动) 及慢速运动。由于预压缸立式安装,因此在液压缸下腔装有起平衡支承作用的单向平衡阀(一般设定为35 MPa) 。为了防止由于液压缸卸压而造成的下腔局部真空,在阀组回油路上装有背压单向阀。预压回路某些动作的转换是由压力开关实现的。预压缸开始快速差动下降,当压力达到压力开关设定值(8 MPa) 时,预压液
3、压缸快速变慢速继续向下,预压缸到下限位停止下降,卸压后换向返回顶部。预压回路有电气、液压两级压力保护,当压力达到21 MPa 时,压力开关发信关机停泵或卸载。一旦压力开关失灵,设定到22 MPa 的溢流阀起安全溢流作用。工况1 :预压缸快速下降(差动) 。Y12 通电, Y15通电,阀CV13 控制口由D 点压力控制。泵供油经过阀CV14 进入液压缸上腔,液压缸下腔油液由于液压缸活塞的面积差,C 点压力高于D 点压力,阀CV13 被强行开启,使液压缸下腔油液流向上腔(会同泵供油液) 实现差动。使预压缸快速下降。工况2 : 预压缸慢速下降。Y12 通电, Y13 通电, Y15 通电。泵供油经过
4、阀CV14 进入液压缸上腔,液压缸下腔油液经过单向平衡阀,阀CV12 及单向阀回油箱。工况3 :预压缸保压(在压缩下限位时) 。电磁阀全部断电。工况4 :预压缸卸压。Y14 通电、Y16 通电。工况5 :预压缸回升。Y16 通电、Y14 通电、Y11 通电。泵供油经过CV13 阀及单向平衡阀进入液压缸下腔。上腔油液经过CV15 阀及单向阀回油箱,由于泵供油流量大,而单向平衡阀通油截面不可能做得很大,因此大流量的油液经过时,节流作用异常显著,压力损失较大。回升时压力接近系统调节压力。经实践与分析,原液压系统存在问题需要改进 (1) CV13、CV14 阀组原三位四通电磁阀及梭阀改用球阀及内带梭阀
5、的控制盖板和插件组成新的CV13、CV14 阀组,同时CV14 原插件面积比1115 改为12。预压缸保压时,由于CV14 阀插件有较大的面积比,阀关闭速度加快,且使阀芯紧压在阀套上,泄漏情况显著减少,消除了在压缩限位时的反弹现象。 HV8052316 Pree Hydraulic System Improvement The Improvement of the Hydraulic System for HV8052316 Packing Machine Shi Sheng2xing Abstract: Based on the hydraulic system HV8052316 Pree
6、 (surcharging) analysis, on the authors viewpoint, and the hydraulic system Key words: HV8052316 Pree; hydraulic system; two Cartridge Valves HV805 - 316 Pree against chemical fiber bundle post-processing plant operating characteristics and have developed a. The equipment used in the process with ot
7、her old models Pree comparison, the two-socket applications loaded valve control technology, as compared with conventional hydraulic valve is light weight, small size, fast action, easy integration advantages, Time Rhythms, and the working efficiency and reliability has greatly improved. popular use
8、rs praise. The industry is currently used in the packaging equipment mainstream products. But there are still some problems, the most important aspect is pre-pressure hydraulic system, the PWC to lower-pressure cylinder, packing influence, pre-air cylinder pressure rise, surcharging high pressure hy
9、draulic system, the electrical overload and long-term burning. Such situations include the imported equipment in use have also occurred frequently. In this paper, the equipment on the issue of surcharging hydraulic control system made some design analysis and improvement. Surcharging for the aircraf
10、t hydraulic system. Pre-pressure hydraulic system pump source is a vane pump. The circuit controlled by two Cartridge valve block with spacing, unloading, for the function. It also can be passed on the electrical control solenoid valve control hydraulic cylinder fast (differential) and the slow move
11、ment. As pre-installed vertical cylinder pressure, hydraulic cylinder in the cavity under the supporting role of a balance with the one-way balance valve (usually set at 3 to 5 MPa). In order to prevent hydraulic cylinder pressure relief under the cavity caused by the partial vacuum in the oil retur
12、n valve block the road with back-pressure valve. Surcharging loop movements of conversion is achieved by the pressure switch. Pre-pressure differential cylinder rapid decline began, when the pressure to pressure switch settings (8 MPa), the Pre-pressure hydraulic cylinder rapid change continues to s
13、low down, lower-pressure cylinder to stop-drop-and to the pressure relief Back to top. Surcharging loop electrical, hydraulic pressure to protect two, when the pressure of 21 MPa, pressure switch letters or unloading pump shutdown stopped. Once the pressure switch failure, set to 22 MPa, the safety
14、relief valve overflow from the role. Condition 1: Pre-pressure cylinder rapid decline (differential). Y12 electricity, Y15 telecommunications services, control valve CV13 mouth from the D-point pressure control. After pumping oil into the cylinder valve CV14 superior vena cava, inferior vena Oil hyd
15、raulic cylinder hydraulic cylinder piston due to the size difference, C points higher than the D-point pressure, pressure, valve CV13 were forcibly opened, the hydraulic cylinder inferior vena Oil flows on the cavity (with the pump for oil) to achieve differential. Pre-pressure cylinder to rapid dec
16、line. Condition 2: Pre-pressure cylinder slow decline. Y12 telecommunications services, electricity Y13, Y15 electricity. After pumping oil into the cylinder valve CV14 superior vena cava, inferior vena Oil hydraulic cylinder balance valve through a one-way, one-way valves and valve CV12 back to the fuel tank. Case 3: Pre-pressure cylinder pressure (in the lower-compression). Sol
