Apparatus for the strength-and life-test of hydraulic structural elements
专利汇可以提供Apparatus for the strength-and life-test of hydraulic structural elements专利检索，专利查询，专利分析的服务。并且An apparatus for the strength- and life-test of hydraulic structural elements which comprises a pulse generator which produces periodically a pressure-time curve. An electro-hydraulic servo-valve is provided. A pressure device follows the servovalve. A nominal-actual-value-comparison circuit is arranged and the pulse generator operates the pressure device, whereby the latter is adapted to transmit the produced pressure to a testing member, and to readjust the same simultaneously by means of the nominal-actual-value-comparison circuit automatically. A function generator is provided which comprises a rectangle wave signal generator producing a low electric voltage with low frequency and a function transformer following the generator. The function transformer produces an impulse corresponding with a dampening sinus function by feeding an inpulse from the rectangle wave signal generator. The impulse produced by the function transformer is fed as nominal value to the servo-valve. A pressure device follows the servo-valve and affects a member to be tested, and a pressure receiver receives equal pressure from the pressure device, whereby the pressure measured on the pressure receiver is transformed into an electric impulse and is returned as actual value into the servo-valve.，下面是Apparatus for the strength-and life-test of hydraulic structural elements专利的具体信息内容。
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