ROTARY DRIVE DEVICE AND PUMP

• Main Authors: ONIDUKA, Toshiki, KOREEDA, Shinichirou, SEKI, Takuya, SAITOU, Hikaru, KAMEI, Toshiaki, UENO, Masaya
• Format: Patent
• Language: English; French; German
• Published: 27.12.2023
• Subjects: BEARINGS; BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

Comprised are a rotor (20), a magnetic bearing (10), and a drive unit (30) that rotationally drives the rotor. The magnetic bearing comprises a bearing stator (12) and a ring-shaped bearing rotor member (11). The drive unit has a drive stator (32) and a ring-shaped drive rotor member (31). The bearing stator has a plurality of bearing stator cores (17) consisting of a magnetic material, disposed on an outer peripheral side of the bearing rotor member to form a magnetic circuit along with the bearing rotor member, and a bearing coil (18) wound around the bearing stator core. The bearing stator core has a first portion (17a) extending in a first direction orthogonal to a direction facing the bearing rotor member, and a pair of second portions (17b) extending to a bearing rotor member side from both end portions in the first direction of the first portion. The bearing coil is wound around the first portion of the bearing stator core. The drive stator is formed so as to pass through a position between an outer peripheral surface of the rotor and the first portion of the bearing stator core and between the pair of second portions of the bearing stator core in the first direction.