Properties and applications of paper-based friction materials (Part 1)
Friction material is a component material used in power machinery that relies on friction to achieve braking and transmission functions. Any mechanical equipment and various moving vehicles must have braking or transmission devices, and friction materials are key components on such braking or transmission devices, which enable mechanical equipment and various motor vehicles to work safely and reliably .
According to different working environments, friction materials can be divided into dry friction materials and wet friction materials. As the name implies, dry friction materials are generally used in dry environments; wet friction materials refer to friction materials that are in a lubricated state in a sealed environment. Early friction devices mostly used dry friction materials. In recent years, due to their superior performance in terms of reliability, safety and life, wet friction materials have developed rapidly and are widely used in automobiles, construction machinery, agricultural machinery and various Applications such as brakes, clutches and gearboxes of various industrial machinery.
At present, there are various classifications of wet friction materials, including paper-based friction materials, sintered metal-based friction materials, carbon-based friction materials, graphite-based friction materials, rubber-based friction materials, etc., each friction material has its own functions and advantages. Considering factors such as comprehensive production methods, production costs and service life, paper-based friction materials have a relatively large advantage and have been widely used. With the continuous improvement of its formula and production process, modern paper-based friction materials have been widely used in wet brakes, clutches and gearboxes of various vehicles and construction machinery.
2. Basic properties of paper-based friction materials
Paper-based friction material is a material with a network-like porous structure, which is formed by components such as fibers and fillers, and is bonded by resin to form a porous structure. This porous structure can store lubricating oil. When the paper-based friction material is engaged with the friction couple, it is compressed and deformed, and the lubricating oil inside the material is squeezed to the surface to form a lubricating oil film; when separated, the paper-based friction material will rebound again and recover. Existing pores and oil re-absorbed into the pores.
