The utility model provides a mechanical seal takes high temperature water pump of swirl pump closed from circulation system, the forward -mounted of axle has the bearing drive disk assembly, and the mechanical seal structure suit is at the middle part of axle, mechanical seal structure include the suit at epaxial rotating ring and quiet ring, the swirl pump block is epaxial, it lies in the rotating ring with between the quiet ring, the outside lock of volute pump has the gland, the volute pump includes the pump case, the pump case is inside be equipped with along with axle pivoted thick disk impeller, the even processing in thick disk impeller excircle both sides have a same radial little blade of a plurality of structures, the pump case with be equipped with the runner that supplies water and flow between the thick disk impeller, the import sets up with the export the upper portion of pump case. Through using volute pump and mechanical seal structure, to have played sealed effectually, the difficult emergence is leaked, has improved the security performance, because cooling and lubrication is effectual, and the machine of can realizing seal the high -efficient automatic cooling of washing, and the machine seal not fragile, improve the life that the warpout sealed, a great deal of advantages such as operational reliability that have improved the pump greatly.