Characteristics and performance of copper sleeve

Copper sleeve is also called sliding bearing, which is used to support shaft and bear load on shaft, usually made of wear-resistant material. The structure of the metal composite sliding bearing has two or more multilayer metal layers of one metal bearing, which is simple in structure, small in volume, convenient in manufacture, low in cost, low in noise, stable in operation and large in bearing capacity; It is very common to apply various sports organizations which can adapt to different working medium and environment conditions, which have close relationship with people's life, production and scientific research.
The sliding bearing is stable, reliable, low noise or noise free. Under the condition of liquid lubrication, the copper sleeve surface does not contact with the oil directly, which can reduce the friction loss to a large extent. The oil film has certain vibration absorption capacity, but it has a large friction resistance in operation. The part supported by the bearing is called the journal, and the part matching the journal is called the bearing.
Friction coefficient: it refers to the ratio of friction between two surfaces to the vertical force acting on the surface. It is related to the surface roughness, not the size of the contact area.
Wear resistance: the wear resistance of bearing materials in friction system, usually refers to the loss of thickness or weight (generally speaking, the hard shaft is compatible with the flexible shaft sleeve, and the shaft will wear first).
Friction temperature: when the motor shaft and sleeve are friction, the friction heat and heat can increase the temperature of the shaft and sleeve, which will reduce the fit gap between the shaft and the sleeve. The friction heat can make the surface molecular activity of the shaft and sleeve, and make the cement shaft and sleeve bite the shaft and make the system virtual.
Compliance: bearing materials compensate for poor initial fit of sliding surface by elastic-plastic deformation of surface (soft elastic products have good compliance, such as SF-1 compliance is greater than JDB)
Running in: in the shaft material with specific lubrication conditions, after early operation, keep the friction coefficient under shielding and stability, performance (products with shorter period), friction and wear curve)
Embeddedness: the hard particles allowed to be embedded in bearing materials, reducing scratch or abrasive wear performance (better embedded than soft materials of hard materials, jf700 embeds more than jf800) the state of shaft and shaft sleeve during operation
In the case of oil lubrication, the general shaft and shaft sleeve have at least three states in operation.
Dry friction: friction between objects or samples without any lubricant.
Boundary lubrication: critical state before transition from liquid lubrication to dry friction (direct contact with friction surface).
Hydrodynamic lubrication: two kinds of friction surfaces with relative motion. With the help of relative velocity and viscous fluid film, the two friction surfaces are completely separated, and the balanced load generated by the pressure of fluid film is called hydrodynamic lubrication.