Frictionless dynamometer for directly measuring propeller thrust and torque

Abstract

The invention belongs to the field of ship hydrodynamic performance tests, and particularly discloses a frictionless dynamometer for directly measuring propeller thrust and torque, which comprises a horizontal flow guide shell, a vertical connecting sword, a horizontal gear shaft, a horizontal spline shaft, a horizontal connecting shaft, a measuring end shaft and a signal receiver, the vertical connecting sword is installed on the horizontal flow guide shell, a vertical gear shaft is installed in the vertical connecting sword, and the lower end of the vertical gear shaft is meshed with the horizontal gear shaft; the horizontal gear shaft, the horizontal spline shaft, the horizontal connecting shaft and the measuring end shaft are connected in sequence and are all mounted in the horizontalflow guide shell; and an axial strain gauge and a circumferential strain gauge are pasted on the measuring end shaft, and a wireless node is arranged at the horizontal spline shaft and used for wirelessly transmitting measuring signals measured by the axial strain gauge and the circumferential strain gauge to a signal receiver. The sensor is located on the transmission shaft on the outermost layer, thrust and torque can be directly measured at the near end of the propeller, friction force measurement and deduction work are not needed, and higher measurement precision can be achieved.

Description

technical field [0001] The invention belongs to the field of ship hydrodynamic performance test, and more specifically relates to a frictionless dynamic instrument for direct measurement of propeller thrust and torque. Background technique [0002] The ship model self-propulsion instrument is a device for measuring the propulsion performance of the propeller. Its measurement idea is to transmit the thrust and torque from the propeller to the open water tank through the propeller shaft, and install self-propelled instruments and motors and other equipment inside the open water tank. This measurement idea The advantage is that it can well transmit the force of the propeller in the water area to the inside of the open water tank, avoiding the damage of the instrument from entering the water, and it is easy to install in the actual use process and can meet the engineering requirements. [0003] But its disadvantages are also obvious. The part where the propeller shaft enters the...

AI Technical Summary

Problems solved by technology

This treatment method has very high requirements for the installation of the propeller shafting, neither can there be serious water leakage, nor can the zero torque be too large to cause too large errors in the measurement data

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