Small-sized compressor uses the means that oil pump and lead plane main shaft connect continuously, after lead plane is started, oil pump is in of main shaft drive next jobs, to can turn place offers oil. When oil pump runs, oil from airframe oil pool or in setting gasoline tank additionally epispastic, after passing condenser, to respective bearing (made of baked clay) , the piston offers oil, satisfy lubricant need. Use the means that oil pump and lead plane main shaft connect continuously, compressor runs, oil pump works subsequently. When because certain reason is unwarrantable,offerring oil reliably, to ensure lead plane is safe, the pressure contact that can express through electric contact pressure makes compressor jockeys.
If plan institute is shown,stop machine control line automatically for short of of force of internal pressure of oil pump time the principle graph of the road, the working principle of control line road is as follows:
Add up to QS and SA. Press SB1 of the pushbutton that start, KM contactor coil gets report to suck close, KM contactor touchs a head to close from the lock from the lock, KM contactor advocate touch a head to close, electromotor M gets report, the movement that start, compressor works. Compressor starts movement, oil pump works subsequently, inside 5-10s, lube pressure must achieve formulary pressure, general pressure is in 0.15-0.25Mpa.
Formulary pressure is achieved inside formulary time, compressor won't stop machine. When the pressure that short of provides is worth (under 0.05MPa) , pressure is expressed (pressure relay) SP of contact of low oil pressure closes, KT coil gets time relay electric movement, time relay KT delay time closes often open contact to close, circuit of coil of auxiliary relay KA puts through and movement, its often shut contact to disconnect, KM coil cuts off the power release, KM contactor advocate touch a head to disconnect, compress report of act on one's own judgment in an emergency to stop turn, compressor quits the job.
