Multi-operating condition extreme load testing system and method for wheel loader transmission system

Abstract

The invention discloses a multi-operating condition extreme load testing system and a testing method for a wheel loader transmission system. The system mainly comprises a power loading module, a support module, a simulation road surface module, a traction module and a data acquiring and recording module, wherein technical means such as active loading, road surface modulation and the like are adopted, so that the system can be suitable for different spading operating conditions, different road surfaces and loaders of different sizes, and rapid testing of the extreme load of the loader transmission system is realized by testing frictional drag applying on each tire; and according to the method, loads are actively applied to a loader and a bucket through a hydraulic cylinder and a traction module, so that the stress state of the bucket is the same as the stress state during practical operation, loading is flexible, various operating conditions of the loader can be simulated, and testing cost is lowered. Due to the adoption of the system and the method, the extreme loads on a single half shaft, a front transmission shaft, a back transmission shaft, a transmission case output shaft and the like in the transmission system in the operating process of a wheel loader can be obtained.

Description

technical field [0001] The invention belongs to the technical field of load testing, and in particular relates to a multi-working-condition extreme load testing system and method for a drive train of a wheel loader. Background technique [0002] The transmission system is an important part of the wheel loader. Due to the harsh operating conditions of the loader and the large load fluctuations, the speed and torque of the transmission system change frequently, and the change amplitude is large, so the transmission system is very easy for the loader. damaged parts. Studying the load spectrum of the loader drive train is of great significance to the life prediction and reliability design of the loader. [0003] In the process of compiling the load spectrum of the powertrain of the loader, the prediction of the extreme load is one of the key technologies. By predicting the extreme load, the load time history of the test data can be extrapolated to the load time history of the w...

AI Technical Summary

Problems solved by technology

Due to the many working conditions of the test, the differences in each working condition are large, such as cement roads, dirt roads, wet roads, undulating roads, stockpiles, etc. At the same time, it is difficult to simulate some working postures of the loader during the test, such as rear Wheel off the ground, shovel excavation unbalanced load causes only one wheel to touch the ground

Therefore, the test time is long, the cost is high, and the maximum extreme value load is not included in the test load data

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