I have never traveled with my pump on an airplane before but I’m sure millions of people travel with sex toys all the time. Besides the TSA agent monitoring the screen will know what it is to begin with. The only circumstance I see where they would rip open your bag and rummage through it like a vulture on an fresh carcass would be if you were foolish enough to try to bring it carry on because most of the pumps look like zip guns.
Pack your tube with soft cotton clothes for cushioning and separate your pump from the tube donut won’t get scratched. Beyond that there shouldn’t be a big problem so long as you don’t pack film or breakable items with it. Just to be on the dafe side scour the Internet to see how othe people have done it. If worse comes to worse you could always just bring a few clamps or make your own from a gravel cleaner from a pet store for $15-30 to use until you get home.
On the other hand I once read a story from a newspaper about a kid who packed his cheap black pump in his carry on. Then when the TSA agent asked him what it was in front of his mother he tryed to play it off as though somebody slipped a bomb in his suitcase.