트랙 깊이를 고려한 외접기어펌프 시뮬레이션 모델 개발에 관한 연구

Abstract

External gear pumps are widely used in hydraulic control systems due to their advantages such as simplicity of manufacture, compactness and good durability due to their simple structure. Despite these advantages, noise, vibration and cavitation generated during operation remain issues for external gear pumps. These issues lead to lower efficiency and reduced lifetime of the external gear pump. To solve these problems, various studies have been conducted to predict the characteristics of external gear pumps to support optimal design. However, there is insufficient research on the simulation that considers the track depth, which is caused by the eccentricity of the gear shaft due to the pressure difference between the inlet and outlet ports of the external gear pump, causing the gear teeth to dig into the inner surface of the housing. Therefore, this study developed external gear pump simulation model considering the track depth. The model is based on AMESim software and validated by comparing with the experimental results of the same specification pump. This paper is composed of 5 chapters, each of them summarized as follows. In Chapter 2, the configuration of the entire simulation model developed in this study and related equations were described. In addition, the internal leakage and related equations of the external gear pump reflected in the simulation model were also described. In Chapter 3, the experiments to validate the developed simulation model and the corresponding depth measurements to consider the track depth were performed. The specifications of the pumps used in the experiments and applied in simulations are the same and performed under the same conditions. In addition, the track depths that occurred for the pump used in the experiment was measured and the results were analyzed. In Chapter 4, the application of the measured track depth to the simulation model was described. The leakage clearance and TSV data were modified by the track depth. Based on the simulation results, the pressure change of the TSV and leakage flow rate were analyzed, and the simulation model was validated by comparing the experimental and simulation results.