Combination of rolling bearings increase spindle speed

Web Design And Seo For www.china-webdesign.com

grinding spindle - China Manufacturer

Thank you for inquiry my grinding spindle, Tel : 0086-0379-64390888, E-mail: liuping@lyzyc.cc

http://www.lyzycbearing.com/key-grinding-spindle-27/

The need for micro machining in order to meet the rapid development of the machine tool industry, as well as photoelectric industry, the speed of the ultra-high-speed aerostatic bearing is now more than 3x10e6DN, equivalent to the surface of the shaft s peed over 150m / s. However, since the bearing clearance in the range of between 5-20um, at such a speed, the air film must have to withstand particularly high shear rate capability. The resulting viscous forces have a fatal impact on the the bearing thermal and dynamic characteristics.
This new design enables high-speed operation has improved, it is possible to increase the speed limit and hard to reduce run-time temperature.double row ball bearing
Overcome a major limiting factor, the aerostatic bearing faster. Combine aerodynamic principles and statics, the combination of this ditch rolling bearings - spiral groove roll neck bearings and spiral groove thrust bearings, the bearing rotation can squeeze the air to the center. At high speed, this effect of the grooves can be largely change the distribution of the bearing internal air pressure, and improve the load capacity and stiffness . Helical grooves can also change the speed and the gradient of the bearing internal air film, while lowering the viscosity of the bearing wear. Inversely proportional to the viscosity of the air bearing wear and proportional to the area and voids in the same minimum gap, the frictional force of the belt groove combination Rolling than conventional bearings to be small. The higher the speed, this advantage is more obvious. The combination of rolling bearing with a ditch and the performance difference between aerospace bearings can illustrate this point. .

With the increase in the speed and the shaft, the minimum gap of the bearing is reduced from ums to 16um. At low speeds, the result is similar to the conventional bearing. However, when the speed of up to 120,000 rev / min, with a groove bearings have a distinct advantage, but also may reach higher speeds. Importantly, the combination of scroll thrust bearing of the belt groove and conventional thrust bearing, an d having a stationary hardness. However, due to the function of the slot, it consumes less energy.bearing company

Further, due to aerodynamic effects, the hardness with increasing speed increases. But the the traditional thrust bearings on this function. First to demonstrate a combination of rolling bearing grooved advantages is the use of a body of rotation of the inner hole grinding mandrel. The prove and traditional aerospace bearings, with a ditch combination Rolling rotation speed increased by 25% and the current consumption is reduced by 10%.
People will also design a high-speed micro-devices spindle diameter of the machine reduced to 50um. Of course, the accuracy of high-speed and operation as well as the heat of a slow reduction are inseparable.