Efficiency monitoring device, bulldozer power assembly and bulldozer

Abstract

The invention belongs to the technical field of construction machinery, and discloses an efficiency monitoring device, a bulldozer power assembly and a bulldozer. The efficiency monitoring device includes a plurality of strain sensors, a plurality of speed sensors, an engine monitoring unit, and a data acquisition and processing unit. The data acquisition and processing unit is used for calculating the torque of each connecting shaft between a diesel engine and a central drive shaft in the bulldozer power assembly and the mechanical transmission efficiency of each torque transfer part between the connecting shafts. The bulldozer power assembly includes the efficiency monitoring device. The bulldozer includes the bulldozer power assembly. Through coordinated setting of the strain sensors, the speed sensors and the engine monitoring unit, strain and speed data of the bulldozer can be monitored and acquired in real time. The data acquisition and processing unit can process the data to get the mechanical transmission efficiency of each torque transfer part. Thus, real-time reliable data can be provided for transient matching of the bulldozer power assembly.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an efficiency monitoring device, a bulldozer power assembly and a bulldozer. Background technique [0002] In the field of construction machinery, bulldozers, excavators and other machinery are mostly comprehensive systems integrating machinery, heat engine, hydraulic pressure and electric control. Taking a bulldozer as an example, its powertrain includes a diesel engine, a hydraulic torque converter, and a central drive shaft. The hydraulic torque converter includes a hydraulic torque converter and a gear box. The fluid torque converter (Fluid Torque Converter) is a hydraulic component composed of a pump wheel, a turbine wheel, and a guide wheel, and is installed between the engine and the gear box. Between them, the hydraulic oil (ATF) is used as the working medium to transmit torque, change torque, change speed and clutch. Among them, the matching of the diesel...

AI Technical Summary

Problems solved by technology

However, the above-mentioned test bench cannot accurately simulate the actual state of the powertrain of the bulldozer, so there is a large difference between the collected simulated load spectrum and the actual load spectrum such as speed and torque, which affects the matching effect

During the simulation process, since the test space is not limited, the above-mentioned powertrain test bench can be equipped with a larger torque speed sensor. However, in the actual operating environment, the installation space on the bulldozer is limited, and the torque speed Sensors are more difficult

Moreover, the torque speed sensor is a shaft-type elastic device, and there is a certain hysteresis in the measurement. It is not affected when used for steady-state measurement. In the process of detecting loads such as the transient torque of the bulldozer powertrain, the response speed and measurement accuracy are limited. Match speed and match results

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