How to repair | high-speed centrifuge centrifuge speed motor

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The drive part of high-speed centrifuge and high-speed centrifuge. All is the high speed motor, for high speed motor, a general method for repair of general motor repair, must be fixed, after repair, must be able to long time use. High speed centrifuge according to the domestic and foreign practice experience. High speed centrifuge introduce speed of 2O000RPM high speed motor and general low-speed motor different repair methods.
1 to distinguish whether the need to disassemble the armature
High speed centrifuge was observed when the motor is working between the carbon brush and the commutator can occur spark, spark level, (I) is no spark. That the carbon brush and the commutator are normal, no need to repair; (2) there are only 2 ~ 4 tiny sparks. Then carefully observe the commutator surface if flat. Most cases can not be repair; (3) except for R 4 with minimal spark F, there are 1 to 3 large spark, it is not necessary to open the armature, just use the sandpaper grinding brush commutator; (4) high speed centrifuge assumptions appear big spark on the 4, you need to change the device with sandpaper, and carefully the commutator intermittently plus car then must take the carbon brush and the armature open down. Of course a giant commutator being processed, you will want to change the brush grinding brush.
Running in the 2 high-speed centrifuge on armature
According to the inverse order of the armature and the carbon brush device open, hand quietly reversing device, manual running in the carbon brush. According to (1) the method of grinding commutator. And then power running, running in process as follows: first, no load running in 10 h at 5000 RPM, in the running in process found in the appearance of large spark need intermittent running. Carefully check whether stable assembly. High speed centrifuge assuming no spark. The second phase can be used 10000 RPH, 4 h. Wei can enter the third stage after all normal. The third stage is 2500 RPM load, the assumption is used refrigerated centrifuge, high-speed centrifuge do have load running in. Can be connected with the centrifuge tachometer instructions for quasi Wei, but must do light load assumptions with ultra high speed centrifuge do load running in centrifugal highest speed, must understand the back gear ratio. Set the speed as high fan centrifuge above 80000 r/rain, the available high speed small pinch back, high-speed centrifuge suggestions that can make the load lighter, because of ultra high speed centrifuge, variable ratio transmission pipe centrifuges and other fine foot 4.2:1, so when the tachometer indicator 10000 Rrain practice speed of the motor is 2500. R/rain control in the whole load, such as no more than fourth cases that appeared a few small spark or large spark more than two can not continue down the emergence of discontinuous load running in process, in addition to carefully check the equipment can be qualified to return to a running process mushroom new running, until qualified.
Repair of 3 high-speed centrifuge on commutator
(1) high speed centrifuge on flat commutator foundation, only minimal scar or spark, such as second L Port 1 water sandpaper grinding to craft in the case of not disassembling the armature grinding. Grinding the order is: first, according to the external circular radian commutator, processing a wooden things, will be several different thickness of the water sand paper cut into such as the commutator as wide strips, remove the brush (please be careful in taking down the brush handle and the brush slot on the mark, high-speed centrifuge to ensure equipment not at the mercy of change wrong) with sandpaper wooden stick wrapped things commutator, use the other hand to press the motor rotating direction, rotating shaft quietly commutator grinding. High speed centrifuge in order to use sandpaper thick coarse fine when a piece of sandpaper blind cannot use, change to another fine sandpaper, until exhausted the fine water sandpaper (or metallographic sandpaper).
(2) on the surface of the commutator high-speed centrifuge is clearly not flat (hand can touch) or when the motor is working spark such as fourth kinds of circumstances. At this time the need to open the armature commutator lathe machine should be fine lathe, specific technology is: rotate speed is 1600 r/rain, feed is 0.03mm, the cutting depth of 0.1 to 0.05mm tool with high quality alloy tool.
4 high-speed centrifuge apart method for high speed motor
Because in the open end cover and the armature. The oscillation will put the brush damage, should first put the brush is removed from the carbon grains. The solid two carbon tax is surely the same angle to sediment and, to ensure that recovery samples in equipment, at the mercy of the carbon brush not anti loaded, must be in before the mercy of brush to remove the carbon brush. Mark. Other remember don't damage the commutator contact surface of carbon and.

High speed centrifuge understanding to one end of the high-speed motor, generally have a cooling wind dysentery, at the other end may fear must be in the open cooling fan leaf and magnetic steel or speed ring a measuring speed with the magnetic steel or speed ring, cannot turn the fan collapse leaves, velocimetry magnet touch bad. High speed centrifuge suggestions followed in the fan sleeve or between the magnetic steel sleeve and the shaft is also proud of a sign, to repair after the end of may according to position equipment originally because of high speed motor dynamic balancing test with fan blades or speed (speed ring alnico) do, so assembly, must according to mark assembled disassembled at this point in the general motor repair is a trivial matter, can be in high speed centrifuge in the repair is related to the overall situation of I surface. Because once the damage speed ring or a fan film. Or segments are assembled according to mark, even if other parts repair beautifully. Assembled later, uneven oscillation may also cause the machine when working in high speed.
High speed centrifuge to open high-speed motor is not available when the hammer and punch... As the hard knock hard lever to use puller, using puller carefully: pull the top to do directly against top eye. In Rama's top and top of the eye with the pad of a protective pad, the intent is to protect the top of the armature shaft to avoid damage to the eye. Fixed electric pull the ends of the end cover, open a to do before the mark on the seven lower cover. In order to repair after loading J as:. Disassemble the bearing r armature should be careful cleaning, cleaning with gasoline clean aircraft, the gasoline to dry and then with 7014 (or 7018) bearing grease filled bearing chamber (bearing can not high speed motor for general butter, MoS2). Put in the center of the stand-by clean; high speed centrifugal machine the commutator surface is flat and hypothesis there is a layer of purple, this is the oxide layer can protect the commutator surface with brush, powder can be get rid of the surface soft.