Composite bearings in the exploration and process experience
2017-10-09
Composite bearings with its high rotation accuracy, good steel, high bearing capacity, no wear, high durability. The following is the static pressure NTN bearings in the maintenance process to explore and try to get some experience, for your reference.
1. Small hole throttle: (1). The internal throttle to external throttle, and the installation of pressure gauge immediately show the upper and lower chamber pressure. So that easy maintenance, in particular, can be easily cleaned regularly, which is the internal throttle can not match.
(2) throttling ratio. The theoretical value of the throttle ratio β is between 1.2 and 1.5, and 1.25 years is based on years of experience. In the maintenance, the geometric accuracy of the spindle, the geometric accuracy of the front and rear bearings, coaxiality, roundness and taper are strictly controlled to ensure the value of β. According to the carrying capacity of the machine to determine the e value (spindle and bearing geometric center of the eccentricity), so that the best value of β.
(3). The oil chamber in the absence of the spindle, the oil outlet of the oil must be consistent (observation method), if not consistent, should be taken to change the throat of the throat method to change its flow. To 4 cavity, for example, generally under the left and right chamber of the oil column between 20 ~ 25mm, small hole diameter of 0.25 ~ 0.4mm.
3. Fuel system improvement: static pressure NTN bearing oil supply system, in addition to coarse filter, fine filter, the rest of the components of the static pressure NTN bearing has a protective effect. In the original system based on the fuel system to improve.
(1). In the throat of the outlet after the pressure relay and pressure gauge (the original in front of the accumulator), so that the operator can see the size of the pressure and pressure. When the pressure is greater than a certain value, in order to immediately stop, so as not to lock the bearing. Such as: pressure 2MPa, the export chamber pressure 1.2 ~ 1.6MPa, less than 1.2MPa will stop.
(2). Increase the number of detection devices: static NTN bearing spindle and the bearing between the 0.04 ~ 0.05mm gap, during which the oil has a certain resistance value, the detection of this resistance changes, you can know the period The size of the gap. To the spindle as a pole, the bearing for the other pole, measuring its resistance changes. This signal is processed and sent to the photoelectric alarm and control system amplifier to control the spindle motor start and stop, in order to avoid the friction between the shaft and tile.
Hunan Jintai Hardware and Machinery Co.,Ltd. is a professional manufacturer on various kind of bearings over 15 years China factory.
We are making all kinds of slide bearings including DU PTFE composit bushing, DX POM composite bushing,bimetal bushing,wrapped bronze bushing, cast sliding bushings and wear plate bearing pad, sintered bronze bushing and sintering parts, ball transfer bearings, etc.
The shapes of bearings can be in sleeve, flanged, spherical, plate, washer, pad, ring, square etc.
Base materials in carbon steel, harden steel, iron, stainless steel, bronze, brass, copper, bronze-steel alloy.Lubricant materials in PTFE, teflon, POM, nylon, plastic, oil, graphite, grease, MoS2, etc.
Export to America,Canada,Brazil,Peru,Argentina,Chile,Paraguay,Europe,Finland,France,Germany,Italy,Spain,Sweden,
Britain,Estonia,Ukraine,Turkey,Austrial,Russia,Korea,Malaysia,Singapore,Thailand,Egypt,Kenya,Somali,
Congo,Zimbabwe,South Africa,etc.
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