液压快换接头压力降-流量特性试验台的设计及不确定度分析

Designation and Uncertainty Analysis on the Pressure Drop-Flowrate Characteristic Test Platform for Hydraulic Quick-Action Couplings

为测试不同流体介质、流量等工况下液压快换接头的流通能力,设计一套液压快换接头压力降-流量特性试验台,完成配套测试处理软件的开发。该试验台可采用46号液压油或水作为试验介质,其流量测试范围为40~1000 L/min,被测快换接头的进、出口压力降测量范围为0~5.0 MPa,被测快换接头的适用公称通径范围为12.5~51 mm。在此基础上,依据ISO 9110-1:2020和ISO 9110-2:2020标准,建立被测快换接头压降值测量的数学模型,并分别计算得到了使用46号液压油或水作为试验介质时的合成不确定度。该试验台的技术参数符合GB/T 5861—2003,也可用于测量快换接头的流量系数和流阻系数。

In order to test the flow capacity of hydraulic quick-action couplings at different fluid medium,flowrate or other working conditions,a pressure drop-flowrate characteristic test platform for hydraulic quick-action couplings was designed,and the matching test software was developed.The No.46 hydraulic oil or water were used as the test medium with its flowrate ranging from 40 L/min to 1000 L/min.The pressure drop of the applicable hydraulic quick-action couplings was from 0 MPa to 5.0 MPa and the nominal diameter was from 12.5 mm to 51 mm.Besides,according to the standards of ISO 9110-1:2010 and ISO 9110-2:2020,a mathematical model for measuring the pressure drop was established,and the combined uncertainties of pressure drop using the No.46 hydraulic oil or water as the test medium were calculated respectively.The technical parameters of the test platform comply with GB/T 5861—2003.The test platform can also be used to measure the flow coefficient and flow resistance coefficient of the hydraulic quick-action couplings.