Vane anemometer calibration device

Abstract

The invention discloses a vane anemometer calibration device. The vane anemometer calibration device comprises an outer sleeve, an end cover, a rotary shaft, a locking mechanism, a connection framework, a flow deflector and an external scored pulley, wherein the external sleeve is used for forming an admission cavity; the end cover is used for plugging an upper end port of the external sleeve andsupporting parts, such as the rotary shaft; and the flow deflector can be driven by the rotary shaft to adjust an admission angle. A working principle of the vane anemometer calibration device is as follows: starting test equipment, orderly adjusting rotation angles of the rotary shaft, corresponding to different admission angles, after data measured by each sensor is stable, recording data of each sensor, and performing statistics on eddy ratio data under each angle, and comparing the eddy ratio data with standard eddy ratio data to evaluate test precision of the current vane anemometer. In the vane anemometer calibration device, based on a combined linkage mechanism of the external scored pulley, the connection framework and the rotary flow deflector, variable admission guidance is realized, and calibration for multiple eddy ratios and calibration for direct and inverse eddy ratios can be executed.

Description

technical field [0001] The invention relates to the technical field of airway steady flow test of an internal combustion engine, in particular to a blade anemometer calibration device. Background technique [0002] The optimal design of the engine intake system can make the air flow in the cylinder move in a specific way to improve its combustion process. Therefore, the characteristics of the intake system have a significant impact on the overall performance of the engine. The vortex is a kind of airflow movement that rotates around the axis of the cylinder formed in the cylinder during the intake process. In order to make the diesel engine meet the requirements of good power, economy and emission characteristics, the prerequisite is that the air passage in the cylinder head must be able to achieve a sufficiently high flow coefficient and a suitable swirl ratio. Since there are many factors affecting the dynamic evaluation of the performance of the air passage of the intern...

AI Technical Summary

Problems solved by technology

[0005] (1) The test can only be carried out through the cylinder head with a single vortex ratio, and the measurement accuracy of the vane anemometer cannot be fully judged. It is not sufficient to verify the accuracy of the vane anemometer device only with a single vortex ratio;

[0006] (2) If multiple cylinder heads with different vortex ratios are used to calibrate the anemometer, multiple cylinder heads will occupy a lot of test space, and multiple switching changes will lead to low test efficiency and high test cost

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