液压往复密封用V型密封圈密封性能研究
Study on Sealing Performance of V-Ring for Hydraulic Reciprocating Seal

本文以柱塞泵往复过程中活塞杆表面附着的液膜厚度和往复过程的泄漏量作为润滑和密封性能的评价指标。在往复过程中，液膜厚度越厚密封面润滑效果越好，有利于减少密封圈的磨损，但是当介质中含有微小的硬质颗粒时，当液膜厚度大于颗粒直径时，硬质颗粒便会夹带在液膜中进入往复密封面加速密封材料的磨损。本文通过理论推导得知一旦操作参数给定则附着在活塞杆上的液膜厚度只和密封面上接触压力分布有关。随后利用ANSYS对高压柱塞泵V型密封圈进行了有限元分析，计算了不同结构参数密封圈，动密封面的接触压力分布，得到了不同结构参数对V型密封圈润滑、泄漏等密封性能的影响规律。研究结果可为V型密封圈的设计、选用和结构优化提供依据和参考。
In this paper, the thickness of the liquid film attached to the surface of the piston rod and the leakage during the reciprocating process is used as the evaluation indicators of the lubrication and sealing performance. Thicker liquid film attached to the surface of the piston rod will make the sealing lubrication better. This helps reduce the wear of the sealing ring. However, when the medium contains tiny hard particles and the liquid film thickness is thicker than the particle diameter, the hard particles will be entrained in the liquid film and enter the reciprocating sealing surface to accelerate the wear of the sealing material. In this paper, through theoretical deduction, the liquid film thickness on the piston rod is only related to the contact pressure of the sealing surface. Then, the finite element analysis was carried out on the V-ring of the high-pressure piston pump by ANSYS. The contact pressure distribution of different structural parameters was calculated. And the lubrication and leakage of the V-ring of different structural parameters were obtained. The research results can provide basis and reference for the design, selection and structural optimization of V-ring.