Strain type propeller electric dynamometer

Abstract

The invention discloses a strain propeller electric test dynamometer which comprises a support, a servo motor arranged above the support, a vertical transmission shaft in transmission connection with the servo motor, and a horizontal transmission shaft in meshed transmission with the vertical transmission shaft through a gear set, wherein one end of the horizontal transmission shaft is connected with a thrust / torque sensing device; the thrust / torque sensing device is connected with a propeller through a horizontal spindle; a junction box is arranged at the other end of the horizontal transmission shaft through a sliding ring. The immersion depth tested by the dynamometer is 500mm, the dynamometer has high water tightness and normally operates at the temperature of 0-40 DEG C, the stress conditions of an underwater propeller in an operating state can be accurately measured, and the error is controlled to be 0.5 percent.

Description

technical field [0001] The invention relates to a propeller dynamometer, in particular to a strain gauge electric propeller dynamometer. Background technique [0002] Instruments that measure the thrust and torque of a propeller are called propeller dynamometers. Its purpose is to draw the surveying and mapping data into a map, analyze and improve the theoretical design, and meet the needs of actual propeller design. [0003] There are two types of propeller dynamometers: mechanical and electrical. During the test of the mechanical dynamometer, the method of adding and subtracting weights is used to balance the thrust and torque from the propeller. The operation and calculation of this type of dynamometer are troublesome. [0004] However, the internal test equipment of the existing electric test dynamometer is relatively complicated, and the electric test dynamometer mostly uses imported accessories, which are expensive and time-consuming to assemble; and the measurement ...

AI Technical Summary

Problems solved by technology

During the test of the mechanical dynamometer, the method of adding and subtracting weights is used to balance the thrust and torque generated by the propeller. The operation and calculation of this type of dynamometer are troublesome.

[0004] However, the internal test equipment of the existing electric test dynamometer is relatively complicated, and the electric test dynamometer mostly uses imported accessories, which are expensive and time-consuming to assemble; and the measurement accuracy is not high, and errors are prone to occur; it is not convenient for large-scale use

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