Abstract
As a kind of hydraulic power component, the external gear pump determines the performance of the entire hydraulic system. The degradation state of gear pumps can be monitored by sensors. Based on the accelerated life test (ALT), this paper proposes a method to identify the wear degradation state of external gear pumps based on flow field analysis. Firstly, the external gear pump is theoretically analyzed. Secondly, dynamic grid technology is used to simulate the internal flow field of the gear pump in detail. Finally, the theoretical and simulation results are verified by the ALT. The results show that this method can effectively identify the wear degradation status of four sample pumps. The results of the work not only provide a solution to the research on the wear degradation of external gear pumps, but also provide strong technical support for the predictive maintenance of hydraulic pumps.
Highlights
The gear pump is one of the most typical power components of hydraulic systems, which has the advantages of high working efficiency and structural simplicity
Degradation a performance degradation an external gear pump is effectiveness of the method is verified by the parameters measured from experiment
In order to obtain the radial wear and end face wear of the gear pump after wear degradation test, four sample pumps were disassembled, cleaned and dried after accelerated life test (ALT) of the gear pumps, and the wear was measured by profile measuring instrument
Summary
The gear pump is one of the most typical power components of hydraulic systems, which has the advantages of high working efficiency and structural simplicity. Li et al [2] proposed a method to extract the degradation characteristics of the hydraulic pump based on the relative entropy, and predicted the remaining life of the plunger pump. Močilan et al [11] designed the gear pump with the parameterization function of Gambit, analyzed the assembly by finite volume method, and proposed a model for predicting the dynamic. Paper,an anidentification identification method of wear degradation an external is proposed on flow-field analysis. Degradation a performance degradation an external gear pump is effectiveness of the method is verified by the parameters measured from experiment. Wear and degradation state identification of gear pump based on flow field analysis
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