热压成型机液压系统的设计.doc

I 摘要液压气动技术是设备中发展速度较快的技术之一,特别是近年来与微电子、计算机技术相结合,使液压技术进入了一个新的发展阶段。目前,已广泛应用在工业各领域。由于近年来微电子、计算机技术的迅猛发展,液压气动技术不仅在作为以一种基本的传动形式上占有很重要的地位,而且以优良的静态、动态性能成为一种重要的控制技术。热压机是人造板生产中最重要的设备之一。热压机的生产能力决定了人造板生产线的质量,而热压机的技术水平也在很大程度上决定了人造板的质量。发展人造板产业是提高木材利用率的有效途径,热压机是人造板工艺中极其重要的设备,而热压机液压系统是控制热压工艺的关键。在本设计的液压系统中,采用高转速柱塞泵和低转速齿轮泵双泵供油,高、低压泵分别工作,既能实现液压缸的快速动作,又可以缓慢加压。同时,由于系统采用快速卸荷手柄,能够实现人工快速卸荷。另外,系统中采用液压集成块技术,使得系统结构紧凑,元件密度高,占据面积小,运用灵活方便,又易于实现标准化。本设计在原有 QD实验热压机液压系统的基础上作了进一步的改进,使整个系统结构更加紧凑,缩小了系统的占用空间,使热压机具有更高的稳定性和较高的工作效率,在人造板热压成型生产中性能更加完备。关键词:热压机;液压系统;集成阀块;双泵供油;快速卸荷。 II Abstract Hydraulic pneumatic technology is the faster one in the development of technology , Especially in recent years , the conmbination with microelectronics puter technology make hydraulic technology have entered a new stage of development 。 At present , it Has been widely used in the industrial fields 。 Because of the rapid development puter technology and microelectronics in recent years , Hydraulic pneumatic technology not only play an important role as asa kind of basic transmission form ,but also e a kind of important control technology with excellent static and dynamic performance 。 Hot pressing machine isone of the most important of equipment in the man-made board production manufacturing 。 Hot pressing machine production capacity decides the quality of the man-made board in the production line , And the technology level ofhot pressing machine decides the quality of the man-made board toa great extent 。 The Development of panel industry is an effective way to improve the utilization ratio of the wood , Hot pressing machine isa very important equipment in the process of man-made board , and the hydraulic system of the hot pressing machine is the key to control hot-pressing process 。 In this design of the hydraulic system , using high speed piston pump and low speed gear pump to supply oil 。 High and low pressure pump work respectively , can not only realize hydraulic cylinder of rapid movement, but also can increase the p