CS199117B1

CS199117B1 - Supersonic piezoelectric transducer

Info

Publication number: CS199117B1
Application number: CS908477A
Authority: CS
Inventors: Ivan Markuss; Juraj Kalosi
Original assignee: Ivan Markuss; Juraj Kalosi
Priority date: 1977-12-30
Filing date: 1977-12-30
Publication date: 1980-07-31

Description

POPIS VYNÁLEZUDESCRIPTION OF THE INVENTION

K AUTORSKÉMU OSVEDČENIU ČESKOSLOVENSKÁSOCIALISTICKÁREPUBLIKA( 19 ) 199117 l"l (Bl)ON THE CERTIFICATE OF CERTIFICATE CZECHOSLOVAK SOCIALISTICREPUBLIC (19) 199117 l "l (Bl)

461) (23) Výstavná priorita(22) Přihlášené 30 12 77 (21) PV 9084-77 (51) Int. Cl.3 H 03 H 9/25461) (23) Exhibition priority (22) Registered 30 12 77 (21) PV 9084-77 (51) Int. Cl.3 H03H 9/25

ÚŘAD PRO VYNÁLEZYOFFICE OFFICE

A OBJEVY (40) Zverejnené 17 09 7 9(45) Vydané 30 09 82 (75)AND DISCOVERIES (40) Published 17 09 7 9 (45) Published 30 09 82 (75)

Autor vynálezu MAHKUSS IVAN IngAuthor of the Invention MAHKUSS IVAN Ing

a KÁLOSI JUBAJ Ing., NOVÉ MĚSTO NAD VÁHOM (54) Ultrazvukový piezoelektrický měnič 1and KALOSI JUBAJ Ing., NEW TOWN OVER VOM (54) Ultrasonic piezoelectric transducer 1

Vynález aa týká rieáenia ultrazvukového meniča a piexokeramikou, ktorý využita kom-binovaný ayatém kaitania. U doteraz známých rieSení prevedenia ultrazvukového meniča aa používá apOaob, ktorývyužívá dva a viac páeov keramických piezoelektrických diakov uložených na seba, známyako tandemový měnič. Nevýhodou tohoto apčsobu je hlavně to, že každý z diakov nie je rov-nako zatažený a často dochádza k porucha jednoho diaku, podl’a toho kde aa nachádza uzolkmitov.The invention relates to the treatment of an ultrasonic transducer and piexokeramic, which is utilized by combined ayatite. In the prior art solutions of the ultrasonic transducer and the apaaob, which uses two or more pairs of ceramic piezoelectric transducers mounted on one another, it is known as a tandem transducer. The disadvantage of this method is mainly that each of the diacs is not always overcast and often there is a disturbance of one of them, according to where and where they are located.

Uvedené nevýhody zmierňuje a daný technický problém rieéi ultrazvukový piezoelektric-ký měnič podlá vynálezu, ktorého podstatou je, že roztečný priemer aspoň dvoch svornýchspojov je umieatnený na uzlovej kružnici ohybových kmitov horného a dolného kovového dis-ku. Stredný priemer piezokeramickej vrstvy vytvorenej v tvare medzikružia musí byt vBčélalebo totožný a roztečným priemer aa svorných spojov. Výhoda ultrazvukového piezoelektric-kého meniča podl*a předmětného vynálezu spočívá hlavně v tom, že pozdížne kmity piezokera-mických vratiev možno transformovat na kmity ohybové a vSčáou amplitúdou výchyliek.The above-mentioned disadvantages are alleviated and solved by the ultrasonic piezoelectric transducer according to the invention, the principle of which is that the pitch diameter of the at least two clamping connections is located on the knot circle of the bending oscillations of the upper and lower metal disks. The average diameter of the piezoceramic layer formed in the form of an annulus must be either identical or equal to the pitch diameter aa of the joints. The advantage of an ultrasonic piezoelectric transducer according to the present invention lies mainly in the fact that the longitudinal oscillations of the piezoceramic return can be transformed into bending oscillations and with greater amplitude of deflections.

Ultrazvukový piezoelektrický měnič je příkladné znázorněný na přiloženém výkrese,kde na obr. 1 je znázorněný v pohlede v řeze a na obr. 2 pri pracovnej činnosti v čiaa-točnoa řeze, aj a grafom výchyliek. 199 117An ultrasonic piezoelectric transducer is exemplified in the accompanying drawing, wherein FIG. 1 is a cross-sectional view and a deflection graph in FIG. 199 117

Claims

Ultrasonic piezoelectric transducer / fig. 1), consisting of a tool 2, which is fixed by a connecting screw 8 to a transfer element 6. The piezoceramic layers 1 in the shape of the circle are fixed together with the β electrode 2 between the upper 2 and the lower metal disc 2 by means of clamping joints 4.1 whose pitch diameter D is located on the knot circle the oscillation of the upper 2 and lower metal discs 2, the mean diameter B of the piezo-ceramic layers 1 being in this case spaced as the pitch diameter D of the clamping joints 4. Starting from the state where the ultrasonic piezoelectric transducer is mounted in the ultrasonic device / at the oscillation node C drawing not drawn / ready for work. After the device is started and the electrical signal is applied to the center electrode, the longitudinal and bending oscillations are generated. 2 /. In the case of long-range oscillation, the elastic deformation of the upper 2 and lower metal disc 2 and the clamping joints 8 is carried out. At the same time, bending oscillations acting on the upper 2 and lower metal disc 2 and partly on the piezoceramic layers 1 also occur in the case of longitudinal oscillations. By aligning the frequency of the longitudinal and bending frequencies, they achieve their alignment, which means that the oscillations of the piezoceramic layers 1 can be transformed? to the bending oscillations with the amplitude of the deflection amplitude A. By doing so, the ultrasonic power required for the charge load is multiplied. BACKGROUND OF THE INVENTION An ultrasonic piezoelectric transducer consisting of a tool rigidly coupled to a transducer member, a lower metal disk attached thereto, and a piezoceramic upper metal disk attached thereto; a layer together with a central electrode, characterized in that the burst diameter (D) of the at least two clamping joints (4) is located on the knot circle oscillations of the upper (3) and lower metal discs (2), the mean diameter (B) of the piezoceramic layers (1) (formed in the form of an annular ring) is equal to or equal to the pitch diameter (D) of the joints (4). 2 drawings