中心螺柱设计
在压电换能器中，一种用单根螺柱穿过压电陶瓷中心孔的设计。该螺柱可以是一个单独的零件，以螺纹拧入前驱动块；也可以与前驱动块做成一体。螺柱伸出最后一片陶瓷之外的部分带有螺纹，用于安装螺母——该螺母往往就是后驱动块。拧紧该螺母后，陶瓷被压紧在后驱动块与前驱动块之间，从而对陶瓷施加所需的预应力。
在这种设计中，螺栓轴线与换能器轴线重合，陶瓷制成垫圈形（即带中心孔，以便为螺柱留出间隙）。详情 ……
Center stud design
In a piezoelectric transducer, a design where a single stud runs through a center hole in the ceramics. This stud may be a separate component that threads into the front driver or it may be an integral part of the front driver. The portion of the stud that extends beyond the rear ceramic is threaded to accept a nut, which is often the back driver. When this nut is tightened, the ceramics are compressed between the back driver and front driver, thereby applying the required prestress to the ceramics.
In this design, the axis of the bolt coincides with the axis of the transducer and the ceramics are shaped like washers (i.e., with a center hole that provides clearance for the stud). Details ...
Also see —
Center bolt design
Peripheral bolt design