Experimental verification of diagnosis sings technical state HST-90,112

Abstract

The results of the experimental test bench for verification diagnostic features, which include the rate of increase in the pressure behind pump Ṗ, Pa/s and increase the angular speed of the rotor motor speed under load. It is shown that determining technical condition HST-90,112 during the operation is necessary to control: the value of the maximum pressure behind pump during the transition process Pmax when the motor shaft braked nominal torque; time when the pressure of the pump during the transient load reaches maximum tн max, s; the value of maximum angular speed of the rotor of the hydraulic motor during the transient ωmax , 1 / s when the motor shaft braked nominal torque; time when the angular speed of the rotor of the hydraulic motor reaches maximum tм max , s.

To confirm the information content and the reproducibility of the measurements in the diagnosis of HST using a method developed by bench tests were conducted HST sets received by the repair and overhaul of the past. It was established experimentally that the measurement sample values using hydrotester are homogeneous and reproducible. Calculated relative measurement error is decreasing pump flow rate and efficiency a motor that is within 3,3-5,0%. The evaluation of the effect of fluid temperature on the error parameters measured. It is found that the temperature increase leads to an increase in measurement error. This allowed the development of recommendations to stabilize the liquid temperature at 50±5°С at the time of diagnosis.