Analysis on the Steady-state Performance and Losses of a Bent-axis Type Hydraulic Motor Used in Heavy Earth Moving Machinery

Authors

  • Ajit Kumar Pandey Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India https://orcid.org/0000-0001-9948-0937
  • Amit Kumar Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India
  • Nitish Kumar Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India https://orcid.org/0000-0002-4820-194X

DOI:

https://doi.org/10.13052/ijfp1439-9776.2231

Keywords:

Bent axis hydro-motor, Flow-loss, Torque-loss, Hydraulic oil temperature, Overall efficiency

Abstract

Hydraulic components play a significant role in the mining and construction equipment. It is responsible for smooth change in the output speed, torque, and power of the machine. The hydrostatic drive powered by a constant speed electric motor is widely used in the propel system of the mining equipment. Regulation of the displacements of the pump and the hydro-motor of the drive facilitates the control of the straight running and steering of the machines.

In the present scenario, better efficiency and ease of control are the critical aspects to be considered in the design and selection of the hydraulic pump and motor used in underground mining operations. The bent axis hydro-motor is one such equipment that is an electro-hydraulic component that can work in an adverse working environment.

The present study deals with the performance analysis of fixed displacement bent axis hydro-motor at different operating parameters such as different temperatures, sizes, viscosity at different loads, and drive speed. For analysis, the hydraulic drive consists of a variable displacement pump rotated by a constant speed electric motor and a fixed displacement hydro-motor. The regulation of the pump displacement controls the speed of the drive. Manually controlled hydrostatic drive propels the said machine against variable load demands. The present work investigates the performances of the hydro-motor used in the mining and construction machine through detailed modeling and experimentations. The steady-state performances are analyzed in terms of slip, torque losses and efficiency of the hydro-motor. The study finds the design guideline to operate the hydrostatic drive using such motors in a reasonable efficiency zone.

The model is validated for various operating conditions of the equipment by comparing the predicted results with the test results. The outcome of the present work will be expedient for the preliminary design and assortment of similar hydraulic component used in the mobile, mining equipment.

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Author Biographies

Ajit Kumar Pandey, Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India

Ajit Pandey is working as a Assistant Professor in the Department of Mechanical Engineering at NIT, Patna (Bihar, India). He received PhD from IIT (ISM), Dhanbad (Jharkhand, India) in 2020. He completed B.Tech degree in 2011 from MIT, Aurangabad (Maharashtra) and then served as Innovation engineer in industry till year 2012. Thereafter, he joined the PhD in 2014. He has authored many journal articles and one book chapter. His current research interests are hydrostatic transmission system, system modelling and MATLAB simulation.

Amit Kumar, Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India

Amit Kumar is working as Associate Professor and Head of Department (Mechanical Engineering) at NIT Patna (at NIT, Patna (Bihar, India). He completed PhD from Patna University in 2008, M.Tech from NIT Jamshedpur in 1999 and B.E from BIT Meshra, Ranchi in1996. He guided many PhD students and also got life membership of Indian Society for Technical Education – M. No. LM 96264. Apart from this he has authored many journal articles. His current research interests are Design, CAD/CAM and Robotics.

Nitish Kumar, Department of Mechanical Engineering, National Institute of Technology, Patna, Bihar, India

Nitish Kumar is working as a Assistant Professor in the Department of Mechanical Engineering at NIT, Patna (Bihar, India). He completed PhD from NIT, Patna in 2021, M.Tech from NIFFT Ranchi in 2015 and B.Tech from SEC Mayurbhanj, Odisha in 2012. He has authored many journal articles. His current research interests are characterisation of composite material and fabrication of material.

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Published

2021-07-10

Issue

Section

Fluid Power Components & Systems