Engine toque measuring device

Abstract

The invention relates to an engine output torque measuring device which is particularly suitable for a small-size gas turbine engine. A torque piston is arranged at the front end of an intermediate gear shaft of the engine, a torque piston contact force-measuring device is arranged in front of the torque piston and comprises a compression ring and a sliding resistor, and a sliding sheet is driven to slide on a sliding bar of the sliding resistor when the outer side of the compression ring is in compression; when the compression ring is not in compression, an elastic part pushes the compressing ring to move to a free end of the sliding bar of the sliding resistor; when the engine outputs shaft power, the front end of the torque piston presses against the outer side of the compression ring and pushes the compression ring to move; and the sliding resistor, an external power source and an ampere meter form a loop. According to the torque measuring device provided by the invention, current is directly measured to obtain an axial force of a gear train and an engine output torque is indirectly measured based on the axial force, thereby improving the response speed of torque measurement; moreover, because measurement errors are only influenced by elasticity coefficients of a spring pack and voltage stability of a power source, measurement precision and reliability are high.

Description

technical field [0001] The invention relates to an engine output torque measuring device, in particular to a device for measuring the engine output torque in real time by measuring the axial force of a gear shaft, which is applied to a small gas turbine engine mainly outputting shaft power. Background technique [0002] For gas turbine engines that mainly output shaft power, such as gas turbines, turboshaft engines, and turboprop engines, real-time measurement of their output torque is a necessary monitoring method. On the one hand, it can monitor the load state of the engine to provide evidence for the operator; on the other hand, when the engine output torque is too large, take necessary measures to ensure that the engine shafting does not cause accidents due to overload. [0003] Accurate measurement of gas turbine engine output shafts remains a challenging problem at present. Existing torque measuring devices for gas turbine engines mostly measure the output torque of t...

AI Technical Summary

Problems solved by technology

Since the establishment of oil pressure takes time, the data measured by this type of device has serious hysteresis; and because there are many factors affecting oil pressure, such as gearbox pressure fluctuations, oil supply pipeline blockage, etc., the reliability of torque measurement lower

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