Selection and replacement of lubricating materials for crushers

When each crusher leaves the factory, the Red Star machine comes with a set of equipment parameters and operating instructions, which clearly indicate the types of lubricating materials used in the equipment and explain the selection and replacement of lubricating oil materials for everyone.

In the use of equipment, there are various types of lubricating oils, most of which have similar properties. Therefore, when selecting the type of lubricating oil for mining crushing equipment, it is generally necessary to choose based on the specific conditions of the pressure, speed, temperature, device status, lubrication device structure, and other specific components of the equipment.

When the pressure is high, the oil is pressed out of the bearing and then operates in a dry state, producing high operating temperatures. So components that work under high loads require more viscous lubricating oil. When the speed is high, use oil with lower viscosity; On the contrary, when the speed is low, use oil with higher viscosity. Too dry oil usually causes an increase in bearing temperature for faster speeds. When the speed and pressure are relatively high, the oil with lower viscosity will not be squeezed out of the bearing, because when the shaft rotates, it fiercely absorbs the thin oil, like a pump, squeezing the oil pressure between the sliding surfaces, separating them, and forming liquid friction.

Under low temperature conditions in winter, when mining crushing equipment is working in the open air, the viscosity of the lubricating oil should be the smallest. Because when the temperature decreases, the oil quickly condenses and hardens violently, resulting in significant resistance in the moving parts of the machine. To solve this problem, lubricating oil with a condensation temperature of 5-10 degrees Celsius lower than the surrounding air temperature is usually used. In the absence of such lubricating oil, thicker lubricating oil can be converted into thinner lubricating oil by using various additives or infiltrating diesel and solar oil. The amount of infiltrating oil is determined based on the corresponding actual situation.

When selecting the type of oil or replacing it, the degree of wear and tear on the components should be considered. Use sticky oil in easily worn parts and components. When one type of lubricating oil is replaced by another, it can be used according to its main quality index - viscosity; When used at low temperatures, the condensation temperature of the oil should be considered.

Reasonable and correct selection of the type of lubricating oil for the crusher is crucial for the efficient production and maintenance of the crushing machinery. We all know that modern mechanical equipment can operate at high speed and safely, which is closely related to the role of lubricating oil. Especially for heavy mechanical equipment such as mining equipment, it is necessary for us to do a good job in lubricating each component.

The correct selection of appropriate lubricating oil is crucial for the high-speed and safe operation of the crusher, effectively ensuring the production efficiency of users.

How to install tapered roller bearings?

Adjusting the axial clearance for the installation of tapered roller bearings can be achieved by adjusting the nuts, washers, and threads in the bearing seat holes on the shaft neck, or by using methods such as pre tightening springs. The size of axial clearance is related to the arrangement of bearings during installation, the distance between bearings, and the material of the shaft and bearing seat, and can be determined based on working conditions.

For high load and high speed tapered roller bearings, when adjusting the clearance, it is necessary to consider the impact of temperature rise on the axial clearance, and estimate the reduction in clearance caused by temperature rise. In other words, the axial clearance should be appropriately adjusted to be larger.

For bearings with low rotational speed and bearing vibration, installation without clearance or with preload should be adopted. The purpose is to create good contact between the rollers and raceways of tapered roller bearings, distribute the load evenly, and prevent the rollers and raceways from being damaged by vibration and impact. After adjustment, the size of the axial clearance is checked with a dial gauge.

Installation method of thrust tapered roller bearings

Thrust cylindrical roller bearings and thrust needle roller bearings are suitable for low speed situations, while thrust tapered roller bearings have slightly flat speeds. Thrust bearings mainly bear axial loads in assemblies and are widely used. Although the thrust bearing installation operation

How are gears and tapered roller bearings assembled?

When designing gears, there should be axial positioning steps to lock the outer ring of the bearing tightly, and the outer side of the inner ring should be locked with a locking nut. The pre tightening force for locking should be set according to the application conditions.

How to install and adjust the clearance of tapered roller bearings?

Generally, tapered roller bearings are used, both face-to-face and back-to-back, and the clearance size should be determined based on the size of the bearing you choose and the transmission accuracy required by the mechanism! As for the adjustment method, it can be achieved by pressing and loosening!