德國(guó)HYDAC賀德克隔膜式蓄能器資料下載.. 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.
液壓蓄能器
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.
賀德克HYDAC蓄能器按加載方式可分為:

彈簧式
它依靠壓縮彈簧把液壓系統(tǒng)中的過(guò)剩壓力能轉(zhuǎn)化為彈簧勢(shì)能存儲(chǔ)起來(lái),，需要時(shí)釋放出去。其結(jié)構(gòu)簡(jiǎn)單,，成本較低,。但是因?yàn)閺椈缮炜s量有限，而且彈簧的伸縮對(duì)壓力變化不敏感,，消振功能差,，所以只適合小容量、低壓系統(tǒng)（P≦1.0～1.2MPa）,，或者用作緩沖裝置
活塞式
它通過(guò)提升加載在密封活塞上的質(zhì)量塊把液壓系統(tǒng)中的壓力能轉(zhuǎn)化為重力勢(shì)能積蓄起來(lái),。其結(jié)構(gòu)簡(jiǎn)單、壓力穩(wěn)定,。缺點(diǎn)是安裝局限性大,，只能垂直安裝；不易密封,；質(zhì)量塊慣性大,，不靈敏。這類蓄能器僅供暫存能量用
這兩種蓄能器因?yàn)槠渚窒扌砸呀?jīng)很少采用,。但值得注意的是,，有些研究部門(mén)從經(jīng)濟(jì)角度考慮在這兩種蓄能器的結(jié)構(gòu)上做一些改進(jìn)，在一定程度上克服了其缺點(diǎn),。比如國(guó)內(nèi)某廠采用改進(jìn)彈簧式蓄能器的結(jié)構(gòu),。如圖2所示，加大彈簧外徑（大于液壓腔直徑）,、限定彈簧行程（將彈簧大載荷限定在許用極限載荷以內(nèi)）的方法提高了蓄能器的工作壓力和容量,，降低了成本
德國(guó)HYDAC賀德克隔膜式蓄能器資料下載:蓄能器有兩種用途。①當(dāng)?shù)退龠\(yùn)動(dòng)時(shí)載荷需要的流量小于液壓泵流量,，液壓泵多余的流量?jī)?chǔ)入蓄能器,，當(dāng)載荷要求流量大于液壓泵流量時(shí)，液體從蓄能器放出來(lái),，以補(bǔ)液壓泵流量之不足,。②當(dāng)停機(jī)但仍需維持一定壓力時(shí)，可以停止液壓泵而由蓄能器補(bǔ)償系統(tǒng)的泄漏,，以保持系統(tǒng)的壓力,。
蓄能器也可用來(lái)吸收液壓泵的壓力脈動(dòng)或吸收系統(tǒng)中產(chǎn)生的液壓沖擊壓力,。蓄能器中的壓力可以用壓縮氣體、重錘或彈簧來(lái)產(chǎn)生,，相應(yīng)地蓄能器分為氣體式,、重錘式和彈簧式。氣體式蓄能器中的氣體與液體直接接觸者,，稱為接觸式,，其結(jié)構(gòu)簡(jiǎn)單，容量大,，但液體中容易混入氣體,，常用于水壓機(jī)上。氣體與液體不接觸的稱為隔離式,，常用皮囊和隔膜來(lái)隔離,，皮囊體積變化量大，隔膜體積變化量小,，常用于吸收壓力脈動(dòng),。重錘式容量較大，常用于軋機(jī)等系統(tǒng)中,，供蓄能用,。

德國(guó)HYDAC賀德克隔膜式蓄能器資料下載

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