In order to solve the problem of flow pressure drop in a gear pump with a composite structure sliding bearing during its operation,this study initially examines the fault part morphology and structural principles to identify the cause of axial interference due to the separation of the copper-aluminum combined plane in the sliding bearing,leading to the failure of the end face bearing and consequently the decline in flow and pressure.Subsequently,structural force balance calculations,maximum static friction force tests,and simulation analyses are conducted on the sliding bearing components to reveal the mechanism behind the separation of the copper-aluminum combined plane.The separation is attributed to process-related causes,where an initial gap exists at the copper-aluminum combined plane,high-pressure oil enters this gap during the operation of the gear pump,causing further separation under the action of hydraulic pressure.Then,the failure probability of this type of gear pump under different working conditions is assessed to provide recommendations for the use of field products.Finally,based on the failure mechanism,the structure of the sliding bearing is improved and experimentally verified to prevent such issues at the source,offering a reference for the design of similar sliding bearing structures.
维普
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