>>I still don't understand if you're using sliding mesh with the 6DOF solver to calculate the speed of rotation or if you're remeshing the domain. 

ok sir. Tell me what screenshots should I take and show you?

>>To add, 9MPa is a fairly high pressure change, what is the working fluid? 

The working fluid is water with a density of 1050. The task is exactly this: the output will be 12 MPa and the input will be 2-4 MPa. Perhaps this problem cannot be solved, I decided to check it out.