I think yours could be a Blue Lady Orchid (Thelymitra crinita). Very similar but a much more intense blue (no other colour varieties), with purple hairs on the central column. It is only when I took macro photos of the orchids on my block that I recognised I had both species. Flowers a bit later too.
I am waiting for the Blue Lady to flower and I'll post a photo for comparison.
See the WA Florabase for a description at http://florabase.dpaw.wa.gov.au/browse/photo/1705
Scented Sun Orchid (12)