The combination of roll bearings increase spindle speed

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In order to meet the rapid development of the machine tool industry, as well as the photoelectric industry on the need for micro-machining, ultra-high-speed aerostatic bearing speed now has more than 3x10e6DN equivalent shaft surface speed of more than 150m / s. However, due to t he bearing clearance in the range between 5-20um, at that speed, the air film must have the ability to withstand ultra-high shear rate. Have a fatal impact on the resulting viscous force on the thermal performance and dynamic characteristics of the bearing. Successful Loadpoint new design with a combination of ditch rolling aerospace bearings to overcome a series of questions.

This new design allows high-speed operation has been improved, are likely to increase the speed limit and hard to reduce run-time temperature. thin section bearing

Loadpoint the new design has overcome the main restricted factors, aerostatic bearings to achieve a faster rate. Aerodynamics and statics Loadpoint this combination of groove rolling bearing - spiral groove roll neck bearings and spiral groove thrust bearings, bearing rotation to squeeze the air to the center. At high speed, slo t this effect can significantly alter the pressure distribution inside the bearing, load capacity and stiffness. The spiral groove bearing internal air film can change the speed and gradient, while reducing the wear and tear of bearing viscous. Due to the viscosity of the air bearing wear and proportional to the area and the gap is inversely proportional to the same minimum clearance, a combination with groove rolling bearing friction than conventional bearings small. The higher the speed, this advantage is more obvious. The performance difference with a combination of ditch Rolling and aerospace bearings will be able to illustrate this point. . big ball bearing

With the increase of speed and axis, the minimum clearance from the bearing ums reduce to 16um. At low speeds, the results and traditional bearings. However, when speeds of up to 120,000 rev / min, with a groove bearings have obvious advantages, but also may reach higher speeds. Importantly, the combination with groove rolling thrust bearing and the traditional thrust bearing, with a stationary hardness. However, because the function of the slot, it consumes less energy.

In addition, due to aerodynamic effects, the hardness with increasing speed increases. However, the thrust bearing on this function. Combination with groove rolling bearing advantages of the first to demonstrate the use of Internal grinding spindle rotation. Use of proven and traditional aerospace bearings, with a combination of groove rolling bearing rotation speed increased 25% while the current consumption is reduced by 10%.
 
People will also design high-speed micro-devices spindle of the machine reduced to 50um in diameter. Of course, the accuracy of high-speed operation as well as the heat of the slow reduction is inseparable. roller bearing co