Piezoelectric transducer pre-tightening assembly device and method for loading in axial direction of bolt
A piezoelectric transducer, axial loading technology, used in assembly machines, wind power generation, metal processing, etc. Effect of Preload Loading Accuracy
Active Publication Date: 2021-09-28
HARBIN INST OF TECH
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Problems solved by technology
[0004] The present invention aims to solve the problem that the existing sandwich piezoelectric transducer assembly method is to compress the piezoelectric ceramics by applying tightening torque to the pre-tightening bolts. Due to the existence of friction between the contact surfaces and the bolts, the applied The problem of poor accuracy and low repeatability of the pre-tightening force applied to the piezoelectric ceramics provides a piezoelectric transducer pre-tightening assembly device and assembly method that is loaded along the axial direction of the bolt
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specific Embodiment approach 1
[0039] Specific implementation mode one: combine Figure 1-9 Describe this embodiment, a piezoelectric transducer preloaded assembly device loaded along the axial direction of the bolt, which includes a stretching system 1, a sandwich piezoelectric transducer 2, a wrapped connection module 3 and a stand 4, wherein the The front cover plate 2-5 and the rear cover plate 2-3 in the sandwich piezoelectric transducer 2 connect the piezoelectric ceramics 2-6 and the electrode sheet 2-2 through the stud 2-1 and the round nut 2-2. 4 clamping, the package connection module 3 is fixed on the front cover 2-5, and the upper part of the package connection module 3 is set on the top of the platform 4, and the lower part is mounted on the platform 4, and the sandwich type piezoelectric transducer The device 2 is vertically arranged and realizes its axial and radial limit on the stand 4 by wrapping the connection module 3. The tensioning system 1 is screwed to the upper part of the stud 2-1, ...
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The invention discloses a piezoelectric transducer pre-tightening assembly device and method for loading in the axial direction of a bolt, and belongs to the technical field of assembly of sandwich type piezoelectric transducers. The problems that according to an existing sandwich type piezoelectric transducer assembly method, tightening torque is applied to a pre-tightening bolt to compress piezoelectric ceramic, and due to the existence of bolt matching friction force between contact faces, the pre-tightening force applied to the piezoelectric ceramic is poor in accuracy and low in repeatability are solved. A front cover plate and a rear cover plate in a sandwich type piezoelectric transducer clamp piezoelectric ceramic and electrode slices through a double-end stud and a round nut, a wrapping connection module is fixedly installed on the front cover plate, the upper portion of the wrapping connection module is arranged at the top end of a rack in a lap joint mode, and the lower portion of the wrapping connection module is installed on the rack in a penetrating mode. The sandwich type piezoelectric transducer is vertically arranged and is axially and radially limited on the rack through the wrapping connection module, and a stretching system is in threaded connection with the upper portion of the double-end stud, and provides tension for the double-end stud.
Description
technical field [0001] The invention relates to a pre-tightening assembly device and an assembly method of a piezoelectric transducer loaded axially along a bolt, and belongs to the technical field of assembly of sandwich piezoelectric transducers. Background technique [0002] An ultrasonic transducer is a device that can convert electrical power into mechanical power and acoustic power, and is the basis of ultrasonic technology. A sandwich piezoelectric transducer is a typical configuration. The sandwich piezoelectric transducer is composed of a front cover, a rear cover, piezoelectric ceramics, electrode sheets, etc. The front cover and the rear cover clamp the piezoelectric ceramics and the electrode sheets through pre-tightening bolts. Piezoelectric ceramics vibrate at high frequencies under pressure. The pressure on the surface of piezoelectric ceramics seriously affects the performance of piezoelectric ceramics, which in turn affects the output performance of sandwi...
Claims
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IPC IPC(8): B23P19/06B23P21/00B06B1/06
CPCB23P19/067B23P21/002B06B1/06B06B2201/55Y02E10/72
Inventor 王廷章全齐全孙新庆唐德威邓宗全
Owner HARBIN INST OF TECH