What should be done when the problem with the temperature of the CNC lathe bearing is too high?

CNC lathe guide bearing temperature is too high. Burning problem is a common problem of error. The following is how to deal with CNC lathe bearing temperature too high.
1. The role of navigation bearings
The purpose of CNC lathe guide bearing installation is to limit the main axis of the generator so that it can operate and receive the radial load on the main axis of the generator within the specified range of motion of the guide bearing.
2. Operating Principle of Navigation Bearings
The working principle of thin oil film bearings is mainly the use of high-speed rotation. The lubricating oil enters the contact surface of the bearings and shafts to lubricate the bearings. The hot oil after lubrication is cooled by the oil cooling system, and then enters the contact surface of the bearings and shafts. By the movement of the equipment, the lubricating oil is cooled automatically repeatedly. A stable oil film is formed between the shaft and the bearing surface when the main shaft rotates. Thus, it receives the radial load and sends it to the guide bearing and then to the base.
3. Components of navigation bearings
CNC lathe guide bearings are thin oil film bearings, mainly composed of bearing cover, lubricating oil tank, cooling system, oil return pipe, bearing, bearing seat, bearing fastening screw and thermometer and other accessories. The guide bearings of two units at the station. B is divided into eight bearings, evenly distributed along the perimeter on the main guide shaft of the generator.
4. Causal Analysis of Increased Bearing Temperature and Increased Unit Vibration
From the observation of the working situation and the analysis of the maintenance situation, we believe that the main causes of the increased bearing latent temperature and the increased equipment vibration are of the following two types:
① The spacing of the bearing increases greatly beyond the designed spacing, so the lubricating oil cannot easily form an oil film after entering the surface of the guide bearing, causing poor lubrication, resulting in the temperature of the guide bearing increases and the vibration of the unit increases.
b) The contact point on the bearing surface is too small, the contact area is insufficient, does not meet the standard of the equipment.
5. Instructions to solve the increased bearing temperature
According to the manufacturer's design requirements, when the CNC lathe is in continuous working condition, the maximum temperature of the cooling water shall not exceed 25 ℃, the maximum temperature of the watt and the oil temperature shall not exceed 65 ℃, the temperature of the bearing and the oil temperature is high and low, not only related to the temperature of the cooling water. But also related to the lubricant oil flow condition and the gap condition of the main shaft and shaft.
The permissible spacing of the guide bearing of CNC lathe is 0.2~0.3mm (two-sided spacing). The bottom of the bearing shaft is immersed in the lubricating oil. When the main shaft rotates clockwise, the lubricating oil will easily penetrate the guide bearing surface and form an oil film. Lubricating the bearing surface. Even through the peak of the oscillation of the main shaft, even if the working distance is the smallest, due to the short distance, good lubrication conditions, friction generates less heat, good cooling performance, generally will not cause the phenomenon of the bearing temperature rise, and will not cause the phenomenon of the bearing combustion.