Packaging machinery equipment factory in the excitation system for the maintenance of other devices including what content?
Vacuum
packaging machine generator overhaul, exciting circuit should be open, to repair the parts.
with compressed air blowing out the dust on the magnetic switch, check the packaging machinery generator connecting components of complete, good cable connecting bolts should not loose, operator action should be flexible.
Main contact singeing and applies a file carefully, and check the contact surface should be above eighty percent.
Contact and the lead wire should be no overheating become angry phenomenon.
Measure out the magnetic switch switching and direct current (dc) resistance of break-brake coil.
automatic vacuum packaging machine discharge generator rotor resistance and magnetic field discharge resistance generally with out the magnetic switch is installed, the overhaul should check without overheating, the phenomenon such as color change.
Dc resistance compared with previous data, the difference should be not greater than five percent.
The shunt ammeter should be done no phenomenon.
the maintenance after the response to the above parts 1 minute 1 kv ac withstand voltage test and insulation resistance value should be greater than 1 megohm.
for generator cleaning the field rheostat packaging machine, check the operation of the magnetic field rheostat institutions shall be closely, action spirit gear coupling screw, good dynamic and static contact contact.
The static contact surface is smooth, no damage, otherwise the application of sand paper polishing or use the file file.
Dynamic contact should be installed firmly, good elasticity.
Resistance element no overheating and oxidation discoloration phenomenon.
Maintenance can add lubricant on the transmission mechanism joint surface, so that the flexible transmission.
to bag vacuum packaging machine measure each resistor value, the change of the resistance value should have a certain regularity, and compared with the previously measured numerical difference should be not greater than five percent, and then communicate with 1 kv pressure test, 1 minute after the test the insulation resistance should be greater than 1 megohm.
Check the brush holder insulation slip ring is good, after 1 minute 2 kv ac withstand voltage test, insulation resistance value should be greater than 1 megohm.
Brush with spring should be according to the aforesaid exciter brush and repairs to the requirement of the spring, when refitted between brush and slip ring also 2 shall be maintained.
5 ~ 3 mm gap, between the brush and brush it should be 0.
1 to 0.
2 mm gap, also should according to the requirements of the exciter brush grinding, packed.
vacuum packaging machine generator repairs shall measure, the insulation resistance of the rotor winding, minor repair without pump rotor, if it is not necessary, end cover will not open.
If the cover is opened, the response of the stator end winding and the rotor with ring, fan for inspection and cleaning (such as
Use compressed air to blow the net)
。
Hydrogen cooled generator minor repairs should be clean hydrogen cooler, water, cold generator repairs should be undertaken within the rotor and flushing water.
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