A kind of accelerated test verification method of turbocharger turbine core strength

Abstract

The invention relates to an acceleration test verification method for the strength of the center of a supercharger turbine. The acceleration test verification method includes the steps of firstly determining a working state parameter variation course of an engine mission section corresponding to the supercharger turbine, then determining the efficacy losing risk portion of the center of the turbine and the fatigue stress of the center of the turbine, determining the relationship between the fatigue strength of the center of the turbine and the service life by designing a turbine center strength simulation test sample piece and carrying out fatigue performance testing, determining the highest rotation speed of a turbine center strength acceleration test and corresponding acceleration test stress, compiling a turbine center strength rack acceleration test section, then determining the number of cycle times of a turbine center strength acceleration verification test section, and finally carrying out acceleration test verification on the strength of the center of the turbine on a turbine super test rack. test verification of the strength of the center of the supercharger turbine can be achieved on the test rack in a short period of test time, the test efficiency can be remarkably improved, the test time can be shortened, the test cost can be saved, and the scientific basis can be provided for reliability assessment and reasonable use of the supercharger turbine.

Description

technical field [0001] The invention belongs to the reliability evaluation of turbocharger turbine structure and its test verification technology, in particular to a method for accelerating test verification of the core strength of turbocharger turbine. Background technique [0002] The turbocharger is one of the key components of the vehicle engine to increase the power density and enhance the adaptability to the plateau environment. As the core component of the turbocharger, the reliability of the turbocharger directly affects the reliability of the turbocharger and the entire engine. performance and service life. Since the maximum stress of the turbocharger turbine usually occurs at the core of the turbine, and the strength of the turbine core is generally lower than other parts due to the restriction of the casting process, the turbine core is one of the key parts that determine the reliability and life of the turbine. one. [0003] During the use of the vehicle turboc...

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Problems solved by technology

[0004] Although the core strength of the turbocharger turbine can be effectively verified by a long-term assessment test on the test bench by simulating the task profile of the turbocharger, but because the design life of the turbocharger turbine is generally relatively long, it is subject to Due to the limitations of many factors such as test time, test conditions, test cost, etc., this method of verifying the strength of the turbine core on the test bench according to the task profile of the turbocharger is not feasible in engineering practice

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