A selection method of hydraulic torque converter for earth-moving vehicles based on load characteristics

Abstract

The invention provides an earthwork vehicle hydraulic torque converter selecting and assembling method based on load characteristics. The method includes the following steps that as the static characteristics of earthwork vehicle hydraulic torque converters are analyzed, load fluctuation phenomena in the characteristics of the hydraulic torque converters are disclosed; influencing parameters of load fluctuation items in impeller torque of the hydraulic torque converters are analyzed and determined based on the traditional unitary beam theory; concrete expressions of the load fluctuation items in the impeller torque of the hydraulic torque converters are determined through fluid dynamics simulation; impeller dynamic torque estimation models oriented to the load characteristics of the hydraulic torque converters are determined in combination with static expressions of the impeller torque of the hydraulic torque converters; model matching effects are estimated based on the external characteristics of engines and dynamic torque of the hydraulic torque converters, and the hydraulic torque converters are selected and assembled. According to the method for selecting and assembling all parts of a whole machine, adaptability of the parts to external loads of the whole machine is improved on the basis that coordinated actions between all the parts of the whole machine are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of earth-moving machinery vehicles, and relates to a method for selecting and matching a hydraulic torque converter according to load characteristics of working conditions when an earth-moving machinery vehicle is initially equipped with a complete machine. Background technique [0002] As a key component in the performance matching of earth-moving machinery vehicles, the torque converter’s biggest role is to ensure that energy and power are smoothly and efficiently transmitted from the engine to the transmission and even the tires. Therefore, its performance has a great impact on the power and economy of the whole machine. A reasonable selection of hydraulic torque converter can realize the performance matching between the transmission system and the engine, make the engine output efficiently and improve the buffering and vibration reduction performance of the whole machine. [0003] The method of selecting...

AI Technical Summary

Problems solved by technology

This design concept does not take the overall host model and external load conditions into consideration, and the result is that the static matching is very good, but the performance of the whole machine is poor when it encounters complex and harsh working conditions; reasonable The selection of key components of the whole machine should match the actual working conditions of the whole machine, especially for earthmoving machinery such as loaders, bulldozers, etc. Higher matching requirements

As far as the transmission system is concerned, the load characteristics of the whole machine basically directly determine the selection of the drive train components, but in the traditional selection process of the hydraulic torque converter of the whole machine, the dynamic load during the actual operation of the whole machine is not considered characteristic

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