Implementing Intelligent Monitoring of the Technical Condition of Locomotive Hydraulic Transmissions

The power reflux hydrodynamic transmission system (PRHTS) has the advantages of flexible transmission, low-speed torque multiplication, adaptive adjustment of speed ratio to external load, and improved torque converter (TC) transmission efficiency. Therefore, it is highly suitable for wheel loaders. Wheel loaders usually work in harsh environments with complex and changing working conditions, and static power matching makes it challenging to fully utilize wheel loaders’ performance. In response to the above issues, this paper proposes a dynamic power matching optimization design method for PRHTS with capacity adjustment gear (CAG) based on wheel loader. The optimization design method obtains data through V-shaped working condition experiments of the wheel loader, and conducts clustering analysis on the data to obtain high-frequency kinematic segments and their characteristic parameters. On this basis, combined with the analysis of the working principle of PRHTS, the system structural parameters are optimized and designed. Compared with static power matching, the dynamic power matching optimization design method increases the average traction force by 4.9 kN, improves the transmission efficiency by 2.6%, reduces the average fuel consumption rate by 3.66 g (kW·h)−1, and reduces the fuel consumption per V-cycle by 27.7 ml in V-shaped working conditions.

show abstract

Determination of the Frequency of Diagnostics of Hydraulic Transmission Units of Diesel Locomotives

Bodnar,

Ochkasov,

Bodnar

2023

STP

View full text Add to dashboard Cite

Purpose. Modern methodologies for maintaining technical facilities are focused on simultaneously ensuring a given level of equipment reliability and minimizing system maintenance costs. The development of maintenance systems is usually based on the use of equipment reliability data, analysis of diagnostic results and forecasting of the residual life of locomotive equipment. In addition, the development of maintenance systems takes into account the costs of maintenance and repair of components. The main goal of the study is to increase the efficiency of the locomotive fleet by reducing the cost of maintaining locomotives, taking into account the technical condition of its components. Methodology. To achieve this goal, we propose a methodology for determining the rational periods for diagnosing locomotive components based on minimizing the cost of diagnostics and performing maintenance and repair of equipment. To determine the frequency of control, we used data on the reliability of components and parts obtained from the processing of statistical information on the operation of locomotives in operation, as well as data on the costs of restoring components in the event of failures. Findings. A method for determining the rational periods for diagnosing locomotive components based on minimizing the cost of diagnosing and restoring them in case of failure is proposed. Based on the analysis of the reliability of hydraulic transmissions of locomotives in their operation, the reliability indicators of hydraulic transmission units and parts are determined in the form of dependencies of the average number of hydraulic transmission failures on the operating time of the locomotive. A techno-economic map of hydraulic transmission repair and a techno-economic map of its diagnostics have been developed. The results of determining the frequency of diagnostics of the hydraulic transmission UGP750–1200PR of diesel locomotives TGM4 and TGM6 are presented. Originality. The methodology for determining the frequency of monitoring the technical condition of locomotive components has been further developed by taking into account the impact of the system of preventive, scheduled maintenance and diagnostics on the reliability of the locomotive. Practical value. The use of the proposed methodology for the formation of a system for repairing and diagnosing locomotives and their components will allow the formation of a system for maintaining locomotives taking into account their actual condition.

show abstract

Implementing Intelligent Monitoring of the Technical Condition of Locomotive Hydraulic Transmissions

Cited by 3 publications

References 14 publications

Approaches to Improving the Locomotive Maintenance Organization System Through the Introduction of Reliability Centered Maintenance

Approaches to Improving the Locomotive Maintenance Organization System Through the Introduction of Reliability Centered Maintenance

Dynamic power matching for wheel loader based on power reflux hydrodynamic transmission system

Determination of the Frequency of Diagnostics of Hydraulic Transmission Units of Diesel Locomotives

Contact Info

Product

Resources

About