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液壓油彈性模量提高方法與試
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and Experiment for Increasing Effective Fluid Bulk Modulus in Hydraulic Systems
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    摘要:

    分析了液壓系統(tǒng)中含氣量、工作壓力等參數(shù)對(duì)油液有效體積彈性模量的影響規(guī)律，在此基礎(chǔ)上采用抽真空除氣與彈性模量檢測(cè)相結(jié)合的方法提高油液彈性模量至期望值，并試驗(yàn)于某大型液壓泵站。應(yīng)用結(jié)果表明：含氣量對(duì)彈性模量值影響顯著，利用抽真空能夠有效減小油液的含氣量，將彈性模量值由821.3MPa提高至1201MPa；該方法在閉式液壓系統(tǒng)中能夠?qū)崿F(xiàn)油液彈性模量的提高。

    Abstract:

    Effective fluid bulk modulus is an important parameter in hydraulic systems. The major factors of effective fluid bulk modulus were analyzed, and a mathematical model with entrapped air content and working pressure at constant temperature was developed. A device for removing air content based on the method of vacuum-pumping in a closed reservoir was developed to increase bulk modulus. And bulk modulus was measured by the device when vacuum-pumping had been completed. Experiments were carried out in a large hydraulic system, and the results showed that vacuum-pumping is an effective method to reduce air content, and the device increased fluid bulk modulus from 821.3MPa to 1201MPa. Bulk modulus can be improved by using this method in the closed hydraulic system.

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馮斌,龔國(guó)芳,楊華勇.液壓油彈性模量提高方法與試[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(3):219-222. and Experiment for Increasing Effective Fluid Bulk Modulus in Hydraulic Systems[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(3):219-222.

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