德国HYDAC贺德克隔膜式蓄能器资料下载.. are hydropneumatic accumulators with a flexible diaphragm as a separation element between the compressible gas cushion and the operating fluid. HYDAC offers more than 30 diaphragm accumulator variants and more than 300 different fluid connections. HYDAC diaphragm accumulators are designed thereby either as welded constructions or as cartridge constructions and offered in various different steels, elastomers and with different gas connections. 液压蓄能器 HYDAC Technology GmbH has over 50 years' experience in the research & development, design and production of hydraulic accumulators. This includes all hydropneumatic accumulators, from bladder accumulators and piston accumulators to diaphragm accumulators and now also the metal bellows accumulators for further fields of application. Thanks to a continuous expansion of the individual models, an optimised range of accumulators was developed over the years, supplemented by gas- and fluid-side accumulator safeguards such as temperature fuse plugs, burst discs, gas safety valves and additional accessories. 贺德克HYDAC蓄能器按加载方式可分为:  弹簧式 它依靠压缩弹簧把液压系统中的过剩压力能转化为弹簧势能存储起来,需要时释放出去。其结构简单,成本较低。但是因为弹簧伸缩量有限,而且弹簧的伸缩对压力变化不敏感,消振功能差,所以只适合小容量、低压系统(P≦1.0~1.2MPa),或者用作缓冲装置 活塞式 它通过提升加载在密封活塞上的质量块把液压系统中的压力能转化为重力势能积蓄起来。其结构简单、压力稳定。缺点是安装局限性大,只能垂直安装;不易密封;质量块惯性大,不灵敏。这类蓄能器仅供暂存能量用 这两种蓄能器因为其局限性已经很少采用。但值得注意的是,有些研究部门从经济角度考虑在这两种蓄能器的结构上做一些改进,在一定程度上克服了其缺点。比如国内某厂采用改进弹簧式蓄能器的结构。如图2所示,加大弹簧外径(大于液压腔直径)、限定弹簧行程(将弹簧大载荷限定在许用极限载荷以内)的方法提高了蓄能器的工作压力和容量,降低了成本 德国HYDAC贺德克隔膜式蓄能器资料下载:蓄能器有两种用途。①当低速运动时载荷需要的流量小于液压泵流量,液压泵多余的流量储入蓄能器,当载荷要求流量大于液压泵流量时,液体从蓄能器放出来,以补液压泵流量之不足。②当停机但仍需维持一定压力时,可以停止液压泵而由蓄能器补偿系统的泄漏,以保持系统的压力。 蓄能器也可用来吸收液压泵的压力脉动或吸收系统中产生的液压冲击压力。蓄能器中的压力可以用压缩气体、重锤或弹簧来产生,相应地蓄能器分为气体式、重锤式和弹簧式。气体式蓄能器中的气体与液体直接接触者,称为接触式,其结构简单,容量大,但液体中容易混入气体,常用于水压机上。气体与液体不接触的称为隔离式,常用皮囊和隔膜来隔离,皮囊体积变化量大,隔膜体积变化量小,常用于吸收压力脉动。重锤式容量较大,常用于轧机等系统中,供蓄能用。
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