493 results about "Cavitation erosion" patented technology

The invention discloses an optimization design method of an impellor for a cavitation-erosion-resistant centrifugal fan. The method is characterized by acquiring a front cover plate two-dimensional airfoil epiphyseal line, an intermediate two-dimensional airfoil epiphyseal line and a rear cover plate two-dimensional airfoil epiphyseal line on a circumferential XY plane of an original impellor; constructing impellor optimization parameters after parameterization, and constructing an epiphyseal line after variation; inputting the front cover plate two-dimensional airfoil epiphyseal line, the intermediate two-dimensional airfoil epiphyseal line and the rear cover plate two-dimensional airfoil epiphyseal line which are acquired through three dimension variation into a geometric modeling software, thus an impellor three-dimensional shape after variation is formed; measuring and calculating water conservation performances on the basis of single channel meshing; taking a non-dominated sorting genetic algorithm (NSGA-II) of a multi-objective genetic algorithm as an optimization tool, and carrying out multi objective optimization design on the impellor parameters of the centrifugal fan; and selecting a group of impellor parameters with optimal water conservation performance as the impellor parameter after optimization. The method provided by the invention has scientific construction ofoptimization parameters, the optimization process has high automatic degree, the impellor and blade efficiency of the centrifugal pump is high after optimization, and the cavitation erosion performance is outstanding.

The invention discloses cavitation erosion test equipment for testing material performance and a test method thereof, wherein the equipment comprises a Venturi tube, a water tank, a centrifugal pump, a pipe system, a pressure meter A, a pressure meter B, a flow meter, a flow regulation valve A, a flow regulation valve B and a flow regulation valve C, wherein the front end of the Venturi tube is respectively connected with the pressure meter A, the flow regulation valve A, the flow meter, the centrifugal pump and the water tank through the pipe system in sequence; and the rear end of the Venturi tube is respectively connected with the pressure meter B, the flow regulation valve B and the water tank through the pipe system in sequence. The flow regulation valve A and the flow regulation valve B are regulated so that an inlet end and an outlet end of the Venturi tube has a certain pressure difference, and cavitation phenomena occur at the tail end of the neck part of the Venturi tube and the front part of an outlet taper angle. The test method is closer to the generating process of the cavitation erosion in fluid under the actual working conditions. The equipment disclosed by the invention needs few workpieces and has low cost, simple operation process and stable performance in the cavitation test.