Date: 2013-08-20

Thrust ball bearings axial positioning of heating devices and

Thrust ball bearing supporting of attached sealed device can effective to make bearing in not by outside dirt property invasion of good conditions Xia normal work, but this attached sealed device will increases machinery institutions of axis to size, on bearing of using and installed brings inconvenience, while attached sealed device of sealed performance often was axis neck and shell body match parts of processing precision and the shaped bit tolerance of effect, for this in structure compact, and sealed requirements strictly of parts.
Common methods of heating are:
1. electric hot plate heating the bearing is placed at a temperature of 100 ° c heating plates for a few minutes, this method is most convenient, such as flipping a few times so the bearing heat evenly, and high efficiency, size thrust ball bearings are available using this method.
2. position the bearing closed automatically by electric heating temperature control electric heating, heating uniformity, temperature control is accurate, quick heating, suitable for heating a lot of bearing applications.
3. the method of induction heating using induction heater can be fast, reliable and clean the thrust ball bearings is heated to the required temperature, particularly suitable for inner ring of tight fit, due to the heating of the inner ring, while heating rarely, so you can more easily in the shaft, easy admission holes also.
4. bulb heating law using 50W of bulb heating thrust ball bearing, can guarantee heating temperature in 100 ℃ around, smaller bearing can directly put in bulb Shang, larger bearing can placed bulb of cone cover within, cone cover can anti-bulb heat lost, and make heating uniform cone cover upper and lower can adjustable bit, in must of range within adaptation heating different size of bearing if used far infrared bulb, note bulb direction should down, Avoid infrared rays is not conducive to people's eyes the light energy saving light bulb heating method applied to fewer and less frequently required; heating of bearing, usually light bulbs can also be used for lighting, and does not need any additional equipment.
5. oil slot heating law this is application more wide of traditional heating method, oil slot from bottom 50~70mm Department set metal network, bearing placed online, large bearing to with hooks hanging up bearing should not be directly put Yu slot end of, in case contact slot end of of bearing parts local heated high, or slot end of precipitation of dirt property into bearing oil slot heating law of note points following, should using no corrosion sexual hot settled sexual good of mineral oil, best is transformer oil, Oil and containers should be kept clean of oil tank should be heated up with the capacity of thrust ball bearings the size and oil content and, if the container is too small, when in continuous operation, a into the bearings the oil temperature will drop soon, the effect on the wrong side.
Points heating installation method:
① the proper temperature control of heating, high temperature thrust ball bearings will damage, temperature is too low the rings expansion volume, the effect is not significantly 80~100℃ heating temperature of the thermal expansion of diameter of the inner ring, which is for General interference with thrust ball bearings, was sufficient.
② reaches the required temperature to be installed as soon as possible, in order to avoid installation difficulties with cooling.
③ cools in the width direction thrust ball bearings have shrink, so installation should exert some pressure on the inner ring shoulder pressing and cooling with very thin feeler gauges test after test, is in the inner ring and shaft shoulder there is a gap between Word, requires skilled, speedy and accurate.
To prevent thrust ball bearing in axis Shang and in bearing block hole within mobile, bearing within rings must tight solid in axis Shang; coat ring must tight solid in bearing block hole (or set Cup within) bearing of within, and coat ring needs two-way also is one-way axis to tight solid, or is axis to walks, depends on supporting of limited bit requirements and by with bearing of type.

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