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Combined tumbling bearing to improve spindle speed
Source: Bearing network time: 2014-07-09
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This new depiction has improved high-speed work; there is the ability to add speed limits and stiffness while lowering the temperature at work.
Loadpoint's new depiction is useful to overcome the primary limiting element; to make aerostatic bearings complete faster speeds. Combine aerodynamics with statics; Loadpoint, a grooved combined tumbling bearing with a spiral grooved roll neck Bearings and spiral groove thrust bearings; can squeeze air into the middle when the bearing rotates. At high speed; the effect of the groove can greatly change the internal pressure of the bearing; improve the load and hardness. The spiral groove can also change the speed and gradient of the air film inside the bearing, and together reduce the viscous wear of the bearing. Because the viscous wear of the aerospace bearing is proportional to the area and inversely proportional to the open space; in the same minimum space underground; the grooved combined rolling bearing The friction is smaller than that of the traditional bearing. The higher the speed; the more obvious this advantage. The difference in function between the grooved combined rolling bearing and the traditional aerospace bearing can clarify this.
Following the addition of speed and shaft; the minimum open space of the bearing is reduced from 28um to 16um. At low speeds; the result is similar to conventional bearings. However, when the speed is as high as 120,000 rev/min; the grooved bearing has a significant advantage; And there is the ability to reach higher speeds. Importantly; the combined tumbling thrust bearing with groove is the same as the conventional thrust bearing; it has a stop hardness. However, because of the function of the groove; it consumes less energy.
Other; because of the influence of aerodynamics; the hardness is added with the addition of speed. However, the traditional thrust bearing does not have this function. The earliest proof of the combination of the grooved bearing rolling bearing is the transformation of the inner hole grinding mandrel. Proof of use; compared with traditional aerospace bearings; combined grooved bearings with grooves can increase the rotational speed by 25% and the current consumption by 10%.
You will also be able to depict the spindle of a high-speed micro device to reduce the diameter of the machine to 50um. Of course; high speed and precision of work and slow reduction of heat are inseparable.
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