| 摘要 |
A motor pump for circulating hydrogen is provided to rapidly start an electric motor by making torque large generated during a starting thereof although a rotary body and a rotor thread are adhered to each other by being frozen. A motor pump for circulating hydrogen comprises an electric motor(41), a driving shaft(31), a guide member(44), a key(45), and an insertion groove(47). The driving shaft is inserted in the electric motor rotatably relative to the electric motor. The key is rotatably formed on a main plane(31a) of the driving shaft. The insertion groove is concavely formed on an inner plane(44a) of the guide member and includes an opening. A width of the opening is larger than the width of the key. The electric motor rotates more than 2° until the key contacts to inner planes(47A,47B) of the insertion groove. |
