car ac compressor (scroll type) 

Name of the part is "Floating tip seal", which is work like a piston rings.,,,

Yes bro...

Two wire comes from the coil unit is positive and negative, but this both or not directly connect to the power supply., One of the wire is comes through the heater switch located out side of the compressor, so one wire is possitive direct from the coil unit and another one wire is negtive wire come from coil unit through heater switch.,

okay ! thankyou for your wonderful answer. may god bless you ..

Thank you so much....