标准编号：ISO 10767-1:2015
中文名称：液压传动 系统和元件产生压力波动值的测定 第1部分：泵的源流波动和源阻抗的测定方法
英文名称：Hydraulic fluid power — Determination of pressure ripple levels generated in systems and components — Part 1: Method for determining source flow ripple and source impedance of pumps
发布日期：2015-10
标准范围
This part of ISO 10767 establishes a test procedure for measuring the source flow ripple and sourceimpedance of positive-displacement hydraulic pumps. It is applicable to all types of positivedisplacementpumps operating under steady-state conditions, irrespective of size, provided that thepumping frequency is in the range from 50 Hz to 400Hz.Source flow ripple causes fluid borne vibration (pressure ripple) and then airborne noise fromhydraulic systems. This procedure covers a frequency range and pressure range that have been foundto cause many circuits to emit airborne noise which presents a major difficulty in design of hydraulicfluid power systems. Once the source flow ripple and source impedance of hydraulic fluid power pumpare known, the pressure ripple generated by the pump in the fluid power system can be calculated bycomputer simulation using the known ripple propagation characteristics of the system components.As such, this part of ISO 10767 allows the design of low noise fluid power systems to be realized byestablishing a uniform procedure for measuring and reporting the source flow ripple and the sourceimpedance characteristics of hydraulic fluid power pumps.In this part of ISO 10767, calculation is made for blocked acoustic pressure ripple as an example of thepressure ripple. An explanation of the methodology and theoretical basis for this test procedure is givenin Annex B. The test procedure is referred to here as the two pressures/two systems method. Ratings areobtained as follows:a) source flow ripple (in the standard “Norton” model) amplitude, in cubic meter per second[m3/s],and phase, in degree, over 10 individual harmonics of pumping frequency;b) source flow ripple (in the modified model) amplitude, in cubic meter per second [m3/s], and phase,in degree, over 10 individual harmonics of pumping frequency; and its time history wave form,c) source impedance amplitude, in Newton second per meter to the power of five [(Ns)/m5]., andphase, in degree, over 10 individual harmonics of pumping frequency;d) blocked acoustic pressure ripple, in MPa (1 MPa = 106 Pa) or in bar (1 bar = 105 Pa), over 10 individualharmonics of pumping frequency; and the RMS average of the pressure ripple harmonic f1 to f10.
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