Abstract
The mechanism of adhesive friction between viscoelastic materials is a key question. In this study, the friction process of the adhesive interface between a friction lining and a wire rope is dynamically observed in real time to analyze the adhesion hysteresis friction intuitively and quantitatively. The adhesion is determined by the state of motion, while the relative displacement of the wire rope and lining is used to find the magnitude of the adhesive friction. The hysteresis friction is reflected by the internal deformation of the lining. The magnitude of the hysteresis friction is determined by the displacement difference (Δx) in the sliding direction of two marked points at different distances from the contact surface. The results show that the adhesion friction is proportional to the loss modulus and the hysteresis friction is proportional to the ratio of the loss modulus to the square of the storage modulus (E″/(E′2)). The frictional vibration first decreases and then increases with the increase in pressure. The K25 lining has the highest adhesion hysteresis friction and minimal frictional vibration. The result provides a simple and intuitive method for research into the friction transmission and vibration of viscoelastic materials.
Highlights
China is paying increasing attention to the long-term safety and mechanization of coal mining
According to Moore’s adhesion friction theory, the friction of viscoelastic materials mainly comes from adhesive friction and hysteresis friction [27, 28], and the COF (μ) can be expressed by Eq (1):
The hysteresis friction is proportional to the ratio of the loss modulus to the square of the storage modulus (E”/(E'2))
Summary
China is paying increasing attention to the long-term safety and mechanization of coal mining. Mining is being modernized, and the application of multi-rope friction hoist is becoming widespread [1, 2]. The lining will continuously adhere, deform, and break, generating vibration [3, 4]. The transmission of vibration through the flexible wire rope will continue to increase. Once a slight vibration generated at the friction pair, the transmission in a kilometer-long flexible wire rope results in a large vibration shake to the lifting container. It is very important to explore the mechanism of adhesion hysteresis friction and its influencing factors in the process of friction transmission
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