Static pressure in SKF bearings and oil system, apart from thick filter, fine filter, and remaining elements on static pressure SKF bearings have a protective effect. On the basis of the original system to improve the oil supply system. After the throttle plate the outlet pressure relays and pressure gauges (in front of the accumulator) so that the pressures of pressure and can allow the operator to see the size of the. When the pressure difference is greater than a certain value, so as to immediately shut down to avoid bearing lock. Such as: pressure 2mpa, oral 1.2~1.6mpa, down 1.2mpa downtime.
Increase digital detection devices:
Wear-resistant welding rod static pressure 0.04~0.05mm between the spindle and bearings of SKF bearing clearance, oil which have a certain resistance value, detect changes the resistance, you can tell the gap size. Spindle pole, bearing on the other pole, measure its resistance to change. After this signal processing to electro-optical detector and amplifier control system, control the starting and stopping of the spindle motor, so as to avoid friction axis w
Thin-film feedback throttle SKF bearing stiffness is great, but the machine running hold also often appear in phenomena such as tile, napping, the pressure. Film feedback is the most critical film, believes that in practice, Bush holds the main causes of death, napping is: ① thin films induced by severe plastic deformation; ② slow feedback. Load sudden changes, when film was still did not respond, shaft and Watts have been friction; ③ film fatigue. Film long time, fatigue deformation or change feedback parameters.
Increase film thickness and instead use some fatigue resistant material, can achieve good results. Generally adopting rigid film, method of preload, reservation slot. SKF bearing concrete is: rigid film to 4mm 1.4mm thick films thickness in the lower cavity pad 0.05mm thick foil, making spindle adjustments 0.05mm position higher than the ideal location. Purpose is when spindle force (wheel weight, cutting force), returns exactly to the vision Center.
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