THERMAL BARRIER Russian patent published in 2024 - IPC F04D13/02 F04D29/04 

FIELD: pumps.

SUBSTANCE: invention relates to a pump, for example, to a pump with a magnetic coupling. Pump unit (1), for example, pump with magnetic coupling, having inner space (11) formed by housing (2), sealing sleeve (10), which tightly seals enclosed chamber (12) relative to inner space (11) formed by housing (2), impeller shaft (13) driven into rotation around axis (A) of rotation, impeller (16) mounted on one end of impeller shaft (13), inner rotor (17) installed on the other end of impeller shaft (13), device, drive shaft (20) rotated around axis (A) of rotation by drive device, and external rotor (24) installed on drive shaft (20) and interacting with internal rotor (17). Outer rotor (24) has first holder (25) and second holder (32) connected to first holder (25), which at least partially encloses sealing cup (10) and on which magnets (23) are located. First holder (25) comprises annular washer (26) with bushing (27) for attachment to drive shaft (20). First holder (25) has a thermal barrier-forming device (34). Thermal barrier-forming device (34) comprises heat-insulating element (35) and heat-reflecting element (36). Heat-insulating element (35) adjoins annular washer (26) of holder (25), and heat-reflecting element (36) adjoins heat-insulating element (35) and is located between sealing sleeve (10) and heat-insulating element (35).

EFFECT: minimization of heat flow into the drive shaft installed in the bearing bracket and, thus, into the internal rings of the rolling bearing system.

10 cl, 5 dwg