| 摘要 |
<p>The proposed ultrasonic drive is intended for use as a driver of moving parts working in fields of strong direct and secondary (e.g. scatter) radiation. Typically, these drives use electromagnetic motors however irradiating field destroys their electrical insulation and some motor parts become radioactive in strong radiation fields. There are existing drives in which an ultrasonic actuator is used as a driven element. Such drives are made using a piezoelectric resonant element to which the friction element is attached using an organic adhesive layer. This layer can also decompose under radiation influence. In the proposed drive, the piezoelectric resonant elements, the friction elements and friction layer are located, in such way that the junction of these elements with the piezoelectric resonant element is screened from irradiating field by the body of the piezoelectric resonant element or by the body of the driven element.</p> |
