It is possible your recent recharge did not include the correct type or among of oil to go with the refrigerant charge. Sometimes these compressors do get noisy and they sometimes run this way for years.  Sometimes they also self destruct and fill the system with pieces.

Dennis,
From my phone.
________________________________
From: John Rodgers<mailto:jrodgers113@GMAIL.COM>
Sent: ‎8/‎3/‎2016 9:13 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Whining AC compressor

This on my '88 GL. Bloody ho in Alabama just now and badly needed. I
recently serviced the system and it's been fine for about two weeks. Then
started with the whine that has gotten progressively louder. I hate it but
will have to run with it turned of. No experience with this. Anyone have
any ideas. Really hate the idea of having to get a new compressor just now.
Pricey!

Thanks.

John