High-pressure high-temperature liquid viscosity measuring device and method

The invention discloses a high-pressure high-temperature liquid viscosity measuring device and method. The measuring device comprises a high-pressure high-temperature system and a measuring system, wherein the measuring system comprises a driving motor, a torque sensor, a driving magnetic barrel, an induced magnetism barrel, a rotating shaft and a stirring paddle; one end of the torque sensor is connected with the driving motor, the other end of the torque sensor is connected with the driving magnetic barrel, and the driving magnetic barrel rotates along the torque sensor; the induced magnetism barrel is positioned in the driving magnetic barrel and can rotate along the driving magnetic barrel under the magnetic action; one end of the rotating shaft is connected with one end, which is far from the torque sensor, of the induced magnetism barrel, the other end of the rotating shaft is connected with the stirring paddle, and a part of the rotating shaft is positioned in the high-pressure high-temperature system; the stirring paddle is positioned in the high-pressure high-temperature system, and the stirring paddle comprises multiple blades which are symmetrically arranged around the rotating shaft. The measuring device provided by the invention can accurately detect the liquid viscosity under a high-pressure high-temperature condition.