Oil-gas lubrication is the most advanced lubrication technology so far. It is called gas-liquid two-phase fluid cooling lubrication technology in academia. It is especially suitable for occasions with harsh environments, such as high temperatures, heavy loads, high speeds, extremely low speeds, and occasions where dirt, cooling water and corrosive gases invade the bearings.
The working conditions of cooling bed roller bearings meet the conditions of high temperature, heavy load and extremely low speed. Under heavy load conditions, it is required that an oil film of a certain thickness must be formed between the surfaces that rub against each other and have a strong load-bearing capacity. According to experimental research from Harbin Engineering University, the viscosity of two-phase flow is significantly greater than the viscosity of single-phase lubricating fluid. Moreover, as the relative volume content of small air bubbles in the two-phase flow increases, the viscosity of the two-phase flow also increases, that is, the film thickness of the gas-liquid two-phase film composed of lubricating oil of ordinary viscosity is greater than its single-phase liquid film thickness. As the thickness of the lubricating film increases, the formation rate of the lubricating film increases, thereby reducing the chance of direct contact between the two friction surfaces and reducing the friction between the two surfaces. This makes the gas-liquid two-phase fluid lubrication have excellent lubrication and anti-friction properties. effect. Oil-gas lubrication is a typical gas-liquid two-phase fluid cooling and lubrication technology.
<
It is difficult to form an oil film when the bearing is at an extremely low speed, which will lead to poor bearing lubrication. This is also the reason why the bearing wear is greatest when starting and about to stop.
<
Under high temperature conditions, if dry oil is used for lubrication, the dry oil is baked at high temperature for a long time and is easily carbonized, causing blockage of the oil supply pipes and distributors, and the lubrication system will be paralyzed.
<
There are many lubrication points in the cooling bed. Now some cooling beds use self-lubricating bearings for reliable lubrication to reduce the maintenance workload. We once encountered a cooling bed with a bearing, which means there is a lubrication point. It also used a self-lubricating bearing, but later on, oil and air lubrication was installed on the basis of the self-lubricating bearing. br/>System. When the cooling bed is in working condition, maintenance personnel cannot enter. The lubrication points are so densely arranged that they cannot even turn around, let alone maintenance. Therefore, it is necessary to have a reliable lubrication system that can fully adapt to the working conditions of the cooling bed. Oil and gas lubrication should be the ideal choice.
News