There are two tricks how you get through:
- Stand in front of the trap, as close as you can without getting hurt and make a roll through as soon as the blades part.
- Stand sideways, a bit away from the trap and in the middle of the passage. Then sideflip through at the right moment.
There are several more ways you can get through like running or making a dive roll, but they are far more difficult to get right, so I'd suggest one of the methods above. The only quick and relatively safe alternative is running towards the gate and rolling through. (A slightly altered 1st version.)