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Research on Seal Failure Mechanism of Dual Clamp Structure in Low-Pressure Pipeline System

机译:低压管道系统中双夹钳结构密封失效机理的研究

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The dual clamp structure is an important sealing form for the low-pressure pipeline system of machinery and vehicles. The contact pressure and stress at the clamp steel belt affect sealing capacity greatly. In this paper, the finite element method is used to calculate the contact pressure and Mises stress of the dual clamp. Then the contact load, the pre-tensioned load, and the vibration load are taken into account to obtain the failure mechanism of the seal structure. The results show that under the static load environment, the dual clamp can achieve a great sealing performance when the pre-tensioned load reaches the threshold. While in a strong vibration environment, the contact stress of the dual clamp with the same pre-tensioned state is decreased by 2.1%, which can still meet the sealing requirements. But due to the influence of vibration, it may cause severe deformation of the clamp steel belt or the damage of the hose, which will cause the seal failure. Therefore, the comprehensive influence of factors such as pre-tensioned load, and vibration intensity on the contact pressure and structure stress must be fully considered in the reliability design of low-pressure pipeline systems.
机译:双夹钳结构是机械和车辆低压管道系统的重要密封形式。夹紧钢带上的接触压力和应力会极大地影响密封能力。在本文中,有限元方法用于计算双夹具的接触压力和米塞斯应力。然后,考虑接触载荷,预应力和振动载荷,以获得密封结构的破坏机理。结果表明,在静载荷环境下,当预紧载荷达到阈值时,双夹钳可以获得很好的密封性能。在强振动环境下,相同预紧状态的双夹具的接触应力降低了2.1%,仍然可以满足密封要求。但是,由于振动的影响,可能会导致夹紧钢带严重变形或软管损坏,从而导致密封失效。因此,在低压管道系统的可靠性设计中,必须充分考虑预应力,振动强度等因素对接触压力和结构应力的综合影响。

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