Purpose

This paper aims to study the lubrication and sealing performance on the textured piston pair under the cross action of the shape and structure parameters. This paper further carries out the optimization design of low energy consumption hydraulic impact piston pair.

Design/methodology/approach

Based on the characteristics of the ring gap seal piston pair, the flow field analysis model of the whole film gap is established for its periodic treatment. The friction power loss of the piston pair is defined as the evaluation index of the lubrication performance and the leakage power loss as the evaluation index of the sealing performance. The orthogonal test design and CFD software were used to analyze the lubrication and sealing performance of the textured piston pair.

Findings

The cross action of shape and structure factors has a great influence of the lubrication and sealing performance on the textured piston pair. Clearance and shape parameters have great influence on it, while seal length and depth diameter ratio have little influence. The sealing performance of conical textured piston pair is good, while the lubrication performance of square textured piston pair is good. The primary and secondary order of influence of shape and structure on energy consumption on piston pair is B (seal clearance) > C (texture shape) > D (area ratio) > A (seal length) > E (depth diameter ratio).

Originality/value

Breaking the defect of local optimization design on traditional piston pair structure, then find the matching relationship of structural parameters on textured piston pair. Further improve the lubrication and sealing performance of the piston pair, and provide reference for the global optimization design of the low energy consumption hydraulic impact piston pair.

中文翻译：

---

多因素耦合织构活塞副润滑密封性能分析

目的

本文旨在研究织构活塞副在形状和结构参数的交叉作用下的润滑和密封性能。本文进一步进行了低能耗液压冲击活塞副的优化设计。

设计/方法/方法

根据环隙密封活塞副的特点，对其周期性处理建立了全膜隙流场分析模型。活塞副的摩擦功率损失定义为润滑性能的评价指标，泄漏功率损失定义为密封性能的评价指标。采用正交试验设计和CFD软件对织构活塞副的润滑和密封性能进行分析。

发现

形状和结构因素的交叉作用对织构活塞副的润滑和密封性能有很大影响。间隙和形状参数对其影响很大，而密封长度和深径比影响不大。锥形纹理活塞副的密封性能好，方形纹理活塞副的润滑性能好。形状和结构对活塞副能耗影响的主次顺序为B（密封间隙）>C（纹理形状）>D（面积比）>A（密封长度）>E（深径比）。

原创性/价值

打破传统活塞副结构局部优化设计的缺陷，找到纹理活塞副结构参数的匹配关系。进一步提高活塞副的润滑和密封性能，为低能耗液压冲击活塞副的全局优化设计提供参考。