测量内燃机输出轴功率的吸能式水力测功器,过去沿用水钉式或闸套式水力测功器,由于测试精度较低、稳定性差、测试信号不易调节、调节过渡期长,不能适应内燃机向自动化测试发展的需要;为此,湘西仪表总厂动力测试仪器厂最近研制出一种新型内燃机测功设备—SG型水力测功器(其外形见封三)。SG型吸能式水力测功器,由制动部份、测量转矩和转速等部份组成。此外,还备有高精度的转矩校正标定部份的附件。此测功器采用转动惯量小,而吸收功率大、半圆型蜗壳结构的叶轮转子和定子。它工作时,水在转子和定子组成的的蜗壳中环形流动强烈。由于剪切、 Energy-absorbing hydromechanics that measure the output shaft power of an internal combustion engine used water-nail type or gate-type hydromechanics in the past because of poor test accuracy, poor stability, poor test signal adjustment, long transition period adjustment and no adaptation to internal combustion engines To the needs of the development of automated testing; To this end, Xiangxi Instrument Factory Power Testing Instrument Factory has recently developed a new type of internal combustion power measurement equipment-SG-type hydromechanics (the shape see seal three). SG-type energy-absorbing hydraulic dynamometer, by the brake part, measuring torque and speed and other components. In addition, there are high-precision torque correction calibration parts of the annex. The dynamometer uses a small moment of inertia, and absorb large power, semicircular volute structure of the impeller rotor and stator. When it works, the water circulates strongly in the volute which is composed of rotor and stator. Due to shearing,