老化特征提取方法基于经过维修的条的短轴直径比
Yujia Chen1,2, Bo Xu1,2, Yun Tan1,2
1China Yangtze Power Co., Ltd., Yichang 443000, China.
Polymers
|March 14, 2026
概括
本研究引入了一种使用短轴与原直径比率 (b/D) 的新方法,以定量评估水力发电机组中的密封老化. 这种技术为监测工业设备密封件的状况和预测其使用寿命提供了一个实用工具.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 部落学 (tribology) 是一个学科.
背景情况:
- 水力发电机组的密封带随着时间的推移因长期负荷和老化而降解.
- 准确评估老化对于保持设备完整性和防止故障至关重要.
- 现有的方法可能不够量化或实用,无法在现场监测条件.
研究的目的:
- 建议对经过维修的密封条进行定量老化特征提取技术.
- 建立短轴与原直径比 (b/D) 和关键老化参数之间的关系.
- 为工业设备密封件的状态监测和寿命预测提供一个实用的工具.
主要方法:
- 基于能量原理的理论分析,以确定关键的老化参数 (弹性模量E,收成应力σs).
- 辐射压缩模拟模型用于研究经过维修的条的截面变形规律.
- 使用化 (FKM) 和化 (NBR) 样品与辐射压缩试验进行实验验证.
主要成果:
- 短轴直径比 (b/D) 显示出与无尺寸产应力 (σs/E) 的显著线性关系.
- 在b/D和无维单位长度反应力 (F/ED) 之间发现了二次关系.
- 实验性弹性模量计算显示与经验硬度公式一致,特别是Qi对NBR的公式.
结论:
- b/D比是用于定量评估老化的有效特征参数.
- 拟议的技术可以快速准确地评估经过维修的部件中的老化情况.
- 这种方法为在水力发电机组等苛刻环境中进行条件监测和寿命预测提供了方便的工具.
更多相关视频
05:26Two-Dimensional X-Ray Angiography to Examine Fine Vascular Structure Using a Silicone Rubber Injection Compound
Published on: January 7, 2019
6.3K
13:45A Method to Study the Correlation Between Local Collagen Structure and Mechanical Properties of Atherosclerotic Plaque Fibrous Tissue
Published on: November 11, 2022
2.7K
相关概念视频
Deformation in a Circular Shaft
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
Plastic Deformation in Circular Shafts
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
Residual Stresses in Circular Shafts
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the shaft's...
Thin-Walled Hollow Shafts
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
Transmission Shafts: Problem Solving
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
Next, use bending moment diagrams for the shaft to...
Mechanical Characteristics of Steel
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used to...
