HIGH TEMPERATURE PUMP Russian patent published in 2021 - IPC F04D13/02 F04D29/58 

FIELD: oil industry.

SUBSTANCE: high-temperature pump is used for pumping oil products with temperatures up to 420°C. The pump contains a suction casing (1), a middle casing (2), a discharge casing (3), at least one working stage (4), impellers (5), which are installed on the working shaft (6) located in the supports (7), (8), (9), the drive shaft (13) of the electric motor and the clutch (14) connecting the drive shaft (13) of the electric motor with the working shaft (6), permanent magnets (17) and (18) made of an alloy of rare earth metals, thermostabilized at 450°C. To ensure cooling of the sealing screen (23), holes (25) are made in the discharge casing (3), the diameter d of which is approximately 2-6 mm. In this case, the pressure cavity (12) is hydraulically connected through the holes (25) and the gap W, which is approximately 1.0-2.5 mm, and the ratio of the length of the rows of permanent magnets (17), (18) to the average diameter of the coupling (14) L/D is approximately 0.7 - 1.5.

EFFECT: invention increases reliability of operation, efficiency of the pump and the temperature parameters of the pumped medium, due to reliable cooling of the sealing screen and coupling.

4 cl, 4 dwg