| 摘要 |
Disclosed is a heating device for an annular component (4). The device heats the annular component (4) by means of a hot airflow, and comprises an airflow heater (1) and a fan (2), and also comprises an annular cavity (3) which accommodates the annular component (4), wherein an outer wall of the annular cavity (3) is provided with an airflow inlet (301) and an airflow outlet (302), the airflow heater (1) heats the airflow, and the fan (2) passes the airflow into the airflow inlet (301), through an airflow passage in the annular cavity (3) and out of the airflow outlet (302). |
