Research Progress on Abnormal Friction of Construction Machinery Kinematic Joints

Introduction

Construction machinery kinematic joints are essential components that allow relative motion between connected parts, such as booms, arms, and buckets. However, abnormal friction in these joints can lead to excessive wear, heat generation, and joint failure. Over the years, extensive research has been conducted to understand the causes of abnormal friction and develop strategies to mitigate its effects. This article presents the latest research progress in this field.

Wear Mechanisms in Kinematic Joints

Abnormal friction in kinematic joints is primarily caused by wear mechanisms such as adhesive wear, abrasive wear, and fatigue wear. Adhesive wear occurs when materials transfer between joint surfaces under high pressure and temperature, leading to increased friction. Abrasive wear results from the ingress of hard particles into the joint, which increases surface roughness and friction. Fatigue wear occurs due to repetitive loading, leading to microcracks and surface degradation.

Lubrication Improvement

Research has shown that effective lubrication is one of the most critical factors in controlling abnormal friction. Recent advancements in lubrication systems, including the development of high-performance lubricants, have significantly improved joint performance. Researchers have also focused on optimizing lubrication intervals, preventing contamination, and enhancing sealing systems to improve lubrication efficiency.

Friction Prediction Models

Friction prediction models have become an essential tool for understanding and controlling abnormal friction. These models incorporate various factors, including contact pressure, surface roughness, lubrication, and material properties, to predict friction behavior in kinematic joints. Advances in computational methods, such as finite element analysis and dynamic simulation, have allowed for more accurate predictions of friction and wear over time.

Conclusion

Recent research has made significant strides in understanding the causes of abnormal friction in construction machinery kinematic joints and developing strategies to mitigate its effects. By improving lubrication systems, enhancing material properties, and refining friction prediction models, engineers can reduce wear and extend the service life of construction machinery joints.

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