CN112104256B - Axial tangential combined ultrasonic transducer - Google Patents
Axial tangential combined ultrasonic transducer Download PDFInfo
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- CN112104256B CN112104256B CN202010988246.XA CN202010988246A CN112104256B CN 112104256 B CN112104256 B CN 112104256B CN 202010988246 A CN202010988246 A CN 202010988246A CN 112104256 B CN112104256 B CN 112104256B
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- 230000005855 radiation Effects 0.000 claims abstract description 50
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- 230000000149 penetrating effect Effects 0.000 claims description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 16
- 239000000919 ceramic Substances 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000000452 restraining effect Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
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- 230000000694 effects Effects 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
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- H02N2/003—Driving devices, e.g. vibrators using longitudinal or radial modes combined with bending modes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
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Abstract
The invention relates to an ultrasonic transducer, in particular to an axial tangential combined type ultrasonic transducer. The invention solves the problems of poor working reliability and limited application range of the existing ultrasonic transducer. The axial and tangential combined ultrasonic transducer comprises an axial ultrasonic vibrator and a tangential ultrasonic vibrator; the axial ultrasonic vibrator comprises a cake-shaped radiation block, a circular ring-shaped section disc, an insulating sleeve, an axial piezoelectric crystal stack, a circular ring-shaped radiation block, a long pre-tightening rod, a circular pressing plate, three connecting screws, three I-th locking nuts, three II-th locking nuts and an I-th adjusting stud; the tangential ultrasonic vibrator comprises a cup-shaped supporting seat, four tangential piezoelectric crystal stacks, four pairs of constraint blocks, four matching blocks, a circular large end cover, four pairs of I fastening screws, a short pre-tightening rod, a circular small end cover, three II fastening screws and II adjusting studs. The invention is suitable for the fields of industry, agriculture, transportation, life, medical treatment, military and the like.
Description
Technical Field
The invention relates to an ultrasonic transducer, in particular to an axial tangential combined type ultrasonic transducer.
Background
An ultrasonic transducer is a device for converting electromagnetic energy into mechanical energy (sound energy), and is generally made of piezoelectric ceramics or magnetostrictive materials, and the basic principle of the ultrasonic transducer is to convert an ultrasonic frequency alternating current signal into ultrasonic frequency vibration by using the piezoelectric effect of the piezoelectric ceramics or the magnetostrictive effect of the magnetostrictive materials, and the application fields of the ultrasonic transducer include industry, agriculture, transportation, life, medical treatment, military affairs and the like. Under the condition of the prior art, the ultrasonic transducer is limited by the structure thereof, and has the following problems: first, the conventional ultrasonic transducer generally cannot provide uniform and adjustable pre-tightening force, thereby resulting in poor operational reliability. Secondly, the conventional ultrasonic transducer can only generate ultrasonic frequency vibration in a single vibration mode generally, but cannot generate ultrasonic frequency vibration in a composite vibration mode, so that the application range of the ultrasonic transducer is limited. Based on this, it is necessary to invent an axial tangential combined type ultrasonic transducer to solve the problems of poor working reliability and limited application range of the existing ultrasonic transducer.
Disclosure of Invention
The invention provides an axial tangential combined type ultrasonic transducer, aiming at solving the problems of poor working reliability and limited application range of the existing ultrasonic transducer.
The invention is realized by adopting the following technical scheme:
the axial and tangential combined ultrasonic transducer comprises an axial ultrasonic vibrator and a tangential ultrasonic vibrator;
the axial ultrasonic vibrator comprises a cake-shaped radiation block, a circular ring-shaped section disc, an insulating sleeve, an axial piezoelectric crystal stack, a circular ring-shaped radiation block, a long pre-tightening rod, a circular pressing plate, three connecting screws, three I-th locking nuts, three II-th locking nuts and an I-th adjusting stud;
the round cake-shaped radiating block is of a hollow structure; the lower end wall and the side wall of the round cake-shaped radiation block are thick walls; the upper end wall of the round-cake-shaped radiation block is a thin wall; four pairs of I-th blind screw holes which are arranged along the circumferential direction are formed in the edge of the lower outer end face of the round cake-shaped radiation block; the center of the upper end wall of the round cake-shaped radiation block is provided with an I-shaped guide hole in a through way; the inner cavity of the round-cake-shaped radiation block is filled with I hydraulic oil; the inner side surface of the circular ring-shaped festival disk and the middle-upper part of the outer side surface of the circular cake-shaped radiation block are fixed into a whole; the end surface of the circular ring section disc is provided with three I-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way; the lower end face of the insulating sleeve is in contact with the inner edge of the upper outer end face of the round cake-shaped radiating block, and the inner side face of the insulating sleeve is flush with the hole wall of the guide hole I; the axial piezoelectric crystal stack is formed by alternately laminating four annular copper electrode plates and four piezoelectric ceramic circular rings from top to bottom; the axial piezoelectric crystal stack is sleeved on the outer side surface of the insulating sleeve, and two end surfaces of the axial piezoelectric crystal stack are respectively flush with two end surfaces of the insulating sleeve; the lower end face of the annular radiation block is respectively contacted with the upper end face of the axial piezoelectric crystal stack and the upper end face of the insulating sleeve, and the inner side face of the annular radiation block is flush with the inner side face of the insulating sleeve; the long pre-tightening rod can be slidably and hermetically arranged in the guide hole I, the insulating sleeve and the annular radiation block; the lower end surface of the long pre-tightening rod is lower than the upper inner end surface of the round cake-shaped radiation block; the upper end surface of the long pre-tightening rod is lower than the upper end surface of the annular radiation block; a circular limiting groove is formed in the center of the lower end face of the circular pressing plate; the wall of the circular limiting groove is contacted with the upper end of the outer side surface of the circular radiating block; the bottom of the circular limiting groove is in contact with the upper end face of the circular radiating block; an I-shaped adjusting screw hole is formed between the center of the bottom of the circular limiting groove and the center of the upper end face of the circular pressing plate in a penetrating manner, and the aperture of the I-shaped adjusting screw hole is smaller than the inner diameter of the circular ring-shaped radiation block; the outer edge of the end face of the circular pressing plate is provided with three II assembling holes which are arranged equidistantly along the circumferential direction in a penetrating way, and the three II assembling holes are opposite to the three I assembling holes one by one; the lower ends of the three connecting screw rods penetrate through the three I assembling holes in a one-to-one correspondence manner; the upper ends of the three connecting screw rods penetrate through the three II assembling holes in a one-to-one correspondence manner; the three I-shaped locking nuts are correspondingly screwed at the lower ends of the three connecting screw rods one by one, and the three I-shaped locking nuts are tightly pressed on the lower end surface of the circular ring-shaped joint disc; the three II locking nuts are screwed at the upper ends of the three connecting screw rods in a one-to-one correspondence manner, and the three II locking nuts press the upper end faces of the circular pressing plates; the upper end of the first adjusting stud is screwed in the first adjusting screw hole, and the lower end face of the first adjusting stud is tightly pressed on the upper end face of the long pre-tightening rod;
the tangential ultrasonic vibrator comprises a cup-shaped supporting seat, four tangential piezoelectric crystal stacks, four pairs of constraint blocks, four matching blocks, a circular large end cover, four pairs of fastening screws I, a short pre-tightening rod, a circular small end cover, three fastening screws II and adjusting studs II;
the cup-shaped supporting seat comprises a circular cup-shaped main body with a downward cup opening and eight cup-shaped convex parts which are arranged on the radial outer side of the circular cup-shaped main body in an extending mode and have the downward cup opening; the inner cavities of the eight cup-shaped bulges are communicated with the inner cavity of the round cup-shaped main body, and the eight cup-shaped bulges are arranged along the circumferential direction; the upper end wall and the side wall of the round cup-shaped main body and the upper end walls of the eight cup-shaped bulges are thick walls; the side walls of the eight cup-shaped bulges are thin walls; an installation groove is formed between every two adjacent cup-shaped convex parts; the four mounting grooves are wide mounting grooves, the other four mounting grooves are narrow mounting grooves, and the four wide mounting grooves and the four narrow mounting grooves are distributed in a staggered mode along the circumferential direction; the upper outer end face of the cup-shaped supporting seat and the lower outer end face of the round cake-shaped radiating block are coaxially fixed and are mutually insulated; each tangential piezoelectric crystal stack is formed by stacking three rectangular copper electrode plates and two piezoelectric ceramic squares in a staggered manner in the tangential direction; the four pairs of constraint blocks are distributed on two tangential sides of the four tangential piezoelectric crystal piles in a one-to-one correspondence manner, and the four pairs of constraint blocks and the four tangential piezoelectric crystal piles are tightly embedded in the four wide mounting grooves in a one-to-one correspondence manner; the upper end surfaces of the four pairs of restraining blocks and the upper end surfaces of the four tangential piezoelectric crystal stacks are in contact with the lower outer end surface of the round cake-shaped radiating block; the end surfaces of the four pairs of constraint blocks are correspondingly provided with four pairs of III assembling holes in a penetrating way, and the four pairs of III assembling holes are opposite to the four pairs of I blind screw holes one by one; the four matching blocks are tightly embedded in the four narrow mounting grooves in a one-to-one correspondence manner; the circular big end cover is covered on the cup mouth of the cup-shaped supporting seat, and the upper end face of the circular big end cover is respectively contacted with the lower end faces of the four pairs of restraining blocks and the lower end faces of the four tangential piezoelectric crystal stacks; a II-th guide hole is formed in the center of the end face of the circular large end cover in a penetrating manner; the edge of the end face of the circular big end cover is provided with four pairs of IV assembly holes which are arranged along the circumferential direction in a penetrating way, and the four pairs of IV assembly holes are opposite to the four pairs of III assembly holes one by one; the lower end face of the circular big end cover is provided with three II blind screw holes which are arranged at equal intervals along the circumferential direction; the circular big end cover and the cup-shaped supporting seat are enclosed together to form an oil storage cavity, and the oil storage cavity is filled with II hydraulic oil; the four pairs of I fastening screws penetrate through the four pairs of IV assembling holes and the four pairs of III assembling holes in a one-to-one correspondence manner, and the tail ends of the four pairs of I fastening screws are screwed in the four pairs of I blind screw holes in a one-to-one correspondence manner; the heads of the fourth fastening screws are tightly pressed on the lower end face of the round large end cover; the short pre-tightening rod can be slidably and hermetically arranged in the II-th guide hole in a penetrating way; the upper end surface of the short pre-tightening rod is higher than the upper end surface of the circular large end cover; the lower end face of the short pre-tightening rod is higher than the lower end face of the circular large end cover; the upper end face of the small circular end cover is contacted with the lower end face of the large circular end cover; a second adjusting screw hole is formed in the center of the end face of the small circular end cover in a penetrating manner, and the aperture of the second adjusting screw hole is smaller than that of the second guide hole; the edge of the end face of the small circular end cover is provided with three V-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way, and the three V-shaped assembling holes are opposite to the three II-shaped blind screw holes one by one; the three II fastening screws penetrate through the three V assembling holes in a one-to-one correspondence manner, and the tail ends of the three II fastening screws are screwed into the three II blind screw holes in a one-to-one correspondence manner; the heads of the three II fastening screws are all tightly pressed on the lower end face of the small circular end cover; the lower end of the II adjusting stud is screwed in the II adjusting stud, and the upper end face of the II adjusting stud is tightly pressed on the lower end face of the short pre-tightening rod.
The specific working process comprises the following steps: firstly, generating axial ultrasonic frequency vibration: and connecting the four annular copper electrode plates with the same ultrasonic generator through leads. The ultrasonic generator converts 50Hz alternating current into ultrasonic frequency alternating current signals, and then the ultrasonic frequency alternating current signals are transmitted to the four annular copper electrode plates, so that the four piezoelectric ceramic circular rings generate axial ultrasonic frequency vibration (namely, axial ultrasonic frequency stretching displacement). And axial ultrasonic frequency vibration acts on the four matching blocks, so that the axial ultrasonic frequency vibration is obtained on the four matching blocks. Secondly, generating tangential ultrasonic frequency vibration: twelve rectangular copper electrode plates are connected with the same ultrasonic generator through leads. The ultrasonic generator converts 50Hz alternating current into ultrasonic frequency alternating current signals, and then the ultrasonic frequency alternating current signals are transmitted to the twelve rectangular copper electrode plates, so that the eight piezoelectric ceramic squares generate tangential ultrasonic frequency vibration (namely tangential ultrasonic frequency stretching displacement). The tangential ultrasonic frequency vibration acts on the four matching blocks, so that the tangential ultrasonic frequency vibration is obtained on the four matching blocks. Thirdly, generating composite ultrasonic frequency vibration: and the four annular copper electrode plates and the twelve rectangular copper electrode plates are connected with the same ultrasonic generator through leads. The ultrasonic generator converts 50Hz alternating current into ultrasonic frequency alternating current signals, and then transmits the ultrasonic frequency alternating current signals to the four annular copper electrode plates on one hand and transmits the ultrasonic frequency alternating current signals to the twelve rectangular copper electrode plates on the other hand, so that on one hand, the four piezoelectric ceramic rings generate axial ultrasonic frequency vibration, and on the other hand, the eight piezoelectric ceramic square blocks generate tangential ultrasonic frequency vibration. The axial ultrasonic vibration and the tangential ultrasonic vibration act on the four matching blocks together, so that composite ultrasonic vibration (namely elliptical ultrasonic vibration) is obtained on the four matching blocks. In the above process, four matching blocks are used for acoustic impedance matching on the one hand and for mounting of a tool or a workpiece on the other hand. Under the hydraulic action of the hydraulic oil I, the thin wall of the disk-shaped radiating block (namely the upper end wall of the disk-shaped radiating block) deforms (bulges upwards), so that uniform axial pre-tightening force is provided for the axial piezoelectric crystal stack. By screwing the I-th adjusting stud, the long pre-tightening rod can move axially, so that the immersion length of the long pre-tightening rod in I-th hydraulic oil is changed, the thin-wall deformation of the disc-shaped radiation block is changed, and the adjustment of the axial pre-tightening force is realized. Under the hydraulic action of the II hydraulic oil, the thin walls of the cup-shaped supporting seat (namely the side walls of the eight cup-shaped bulges) deform (bulge outwards), so that uniform tangential pre-tightening force is provided for the four tangential piezoelectric crystal stacks and the four matching blocks. By screwing the II-th adjusting stud, the short pre-tightening rod can move axially, so that the immersion length of the short pre-tightening rod in the II-th hydraulic oil is changed, the thin-wall deformation of the cup-shaped supporting seat is changed, and the tangential pre-tightening force is adjusted.
Based on the process, compared with the existing ultrasonic transducer, the axial tangential combined ultrasonic transducer has the following advantages by adopting a brand new structure: firstly, the invention can provide uniform and adjustable pretightening force (axial pretightening force and tangential pretightening force), thereby effectively improving the working reliability. Secondly, the ultrasonic vibration generator can generate ultrasonic vibration in a single vibration mode and ultrasonic vibration in a composite vibration mode, so that the application range is effectively widened.
The ultrasonic transducer has the advantages of reasonable structure and ingenious design, effectively solves the problems of poor working reliability and limited application range of the conventional ultrasonic transducer, and is suitable for the fields of industry, agriculture, transportation, life, medical treatment, military and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a partial structural schematic diagram of a tangential ultrasonic vibrator according to the present invention.
Fig. 4 is a top view of fig. 3.
FIG. 5 is a schematic view of the cup-shaped support base of the present invention.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a sectional view a-a of fig. 5.
In the figure: 101-a disc-shaped radiating block, 102-a circular ring section disc, 103-an insulating sleeve, 104-a circular copper electrode plate, 105-a piezoelectric ceramic circular ring, 106-a circular radiating block, 107-a long pre-tightening rod, 108-a circular pressing plate, 109-a connecting screw rod, 110-an I locking nut, 111-an II locking nut, 112-an I adjusting stud, 113-I hydraulic oil, 201-a cup-shaped supporting seat, 202-a rectangular copper electrode plate, 203-a piezoelectric ceramic square block, 204-a constraint block, 205-a matching block, 206-a circular big end cover, 207-an I fastening screw, 208-a short pre-tightening rod, 209-a circular small end cover, 210-an II fastening screw, 211-an II adjusting stud and 212-an II hydraulic oil.
Detailed Description
The axial and tangential combined ultrasonic transducer comprises an axial ultrasonic vibrator and a tangential ultrasonic vibrator;
the axial ultrasonic vibrator comprises a cake-shaped radiating block 101, a circular ring-shaped pitch disk 102, an insulating sleeve 103, an axial piezoelectric crystal stack, a circular ring-shaped radiating block 106, a long pre-tightening rod 107, a circular pressing plate 108, three connecting screw rods 109, three I-th locking nuts 110, three II-th locking nuts 111 and an I-th adjusting stud 112;
the round cake-shaped radiation block 101 is of a hollow structure; the lower end wall and the side wall of the round cake-shaped radiation block 101 are both thick walls; the upper end wall of the round-cake-shaped radiation block 101 is a thin wall; the edge of the lower outer end face of the round cake-shaped radiation block 101 is provided with four pairs of I-th blind screw holes which are arranged along the circumferential direction; the center of the upper end wall of the round cake-shaped radiation block 101 is provided with an I-shaped guide hole in a through way; the inner cavity of the round-cake-shaped radiation block 101 is filled with I-th hydraulic oil 113; the inner side surface of the circular ring-shaped festival disk 102 and the middle-upper part of the outer side surface of the circular cake-shaped radiation block 101 are fixed into a whole; the end surface of the circular ring-shaped festival disc 102 is provided with three I-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way; the lower end face of the insulating sleeve 103 is in contact with the inner edge of the upper outer end face of the disc-shaped radiating block 101, and the inner side face of the insulating sleeve 103 is flush with the hole wall of the guide hole I; the axial piezoelectric crystal stack is formed by alternately laminating four annular copper electrode plates 104 and four piezoelectric ceramic circular rings 105 from top to bottom; the axial piezoelectric crystal stack is sleeved on the outer side surface of the insulating sleeve 103, and two end surfaces of the axial piezoelectric crystal stack are respectively flush with two end surfaces of the insulating sleeve 103; the lower end face of the annular radiation block 106 is respectively contacted with the upper end face of the axial piezoelectric crystal stack and the upper end face of the insulating sleeve 103, and the inner side face of the annular radiation block 106 is flush with the inner side face of the insulating sleeve 103; the long pre-tightening rod 107 can be slidably and hermetically arranged in the I-th guide hole, the insulating sleeve 103 and the annular radiation block 106 in a penetrating manner; the lower end surface of the long pre-tightening rod 107 is lower than the upper inner end surface of the round cake-shaped radiation block 101; the upper end surface of the long pre-tightening rod 107 is lower than the upper end surface of the circular ring-shaped radiation block 106; a circular limiting groove is formed in the center of the lower end face of the circular pressing plate 108; the wall of the circular limiting groove is in contact with the upper end of the outer side surface of the circular ring-shaped radiation block 106; the bottom of the circular limiting groove is in contact with the upper end face of the circular ring-shaped radiation block 106; an I-shaped adjusting screw hole is formed between the center of the bottom of the circular limiting groove and the center of the upper end face of the circular pressing plate 108 in a penetrating manner, and the aperture of the I-shaped adjusting screw hole is smaller than the inner diameter of the circular ring-shaped radiation block 106; the outer edge of the end face of the circular pressing plate 108 is provided with three II assembling holes which are arranged equidistantly along the circumferential direction in a penetrating manner, and the three II assembling holes are opposite to the three I assembling holes one by one; the lower ends of the three connecting screw rods 109 penetrate through the three I assembling holes in a one-to-one correspondence manner; the upper ends of the three connecting screw rods 109 correspondingly penetrate through the three II assembling holes one by one; the three I-th locking nuts 110 are screwed on the lower ends of the three connecting screws 109 in a one-to-one correspondence manner, and the three I-th locking nuts 110 are all tightly pressed on the lower end face of the circular ring segment disc 102; the three second locking nuts 111 are screwed on the upper ends of the three connecting screws 109 in a one-to-one correspondence manner, and the three second locking nuts 111 press the upper end surface of the circular pressing plate 108; the upper end of the I-th adjusting stud 112 is screwed into the I-th adjusting screw hole, and the lower end surface of the I-th adjusting stud 112 tightly presses the upper end surface of the long pre-tightening rod 107;
the tangential ultrasonic vibrator comprises a cup-shaped supporting seat 201, four tangential piezoelectric crystal stacks, four pairs of constraint blocks 204, four matching blocks 205, a circular large end cover 206, four pairs of I fastening screws 207, a short pre-tightening rod 208, a circular small end cover 209, three II fastening screws 210 and an II adjusting stud 211;
the cup-shaped support seat 201 comprises a circular cup-shaped main body with a downward cup opening and eight cup-shaped convex parts which are arranged on the radial outer side of the circular cup-shaped main body in an extending mode and have the downward cup opening; the inner cavities of the eight cup-shaped bulges are communicated with the inner cavity of the round cup-shaped main body, and the eight cup-shaped bulges are arranged along the circumferential direction; the upper end wall and the side wall of the round cup-shaped main body and the upper end walls of the eight cup-shaped bulges are thick walls; the side walls of the eight cup-shaped bulges are thin walls; an installation groove is formed between every two adjacent cup-shaped convex parts; the four mounting grooves are wide mounting grooves, the other four mounting grooves are narrow mounting grooves, and the four wide mounting grooves and the four narrow mounting grooves are distributed in a staggered mode along the circumferential direction; the upper outer end face of the cup-shaped supporting seat 201 and the lower outer end face of the disc-shaped radiating block 101 are coaxially fixed and are mutually insulated; each tangential piezoelectric crystal stack is formed by stacking three rectangular copper electrode plates 202 and two piezoelectric ceramic squares 203 in a staggered manner along the tangential direction; the four pairs of constraint blocks 204 are distributed on two tangential sides of the four tangential piezoelectric crystal piles in a one-to-one correspondence manner, and the four pairs of constraint blocks 204 and the four tangential piezoelectric crystal piles are tightly embedded in the four wide installation grooves in a one-to-one correspondence manner; the upper end faces of the four pairs of restraint blocks 204 and the upper end faces of the four tangential piezoelectric crystal stacks are in contact with the lower outer end face of the cake-shaped radiation block 101; the end surfaces of the four pairs of constraint blocks 204 are correspondingly provided with four pairs of III assembling holes in a penetrating way, and the four pairs of III assembling holes are opposite to the four pairs of I blind screw holes one by one; the four matching blocks 205 are tightly embedded in the four narrow mounting grooves in a one-to-one correspondence manner; the circular big end cover 206 is covered on the cup opening of the cup-shaped supporting seat 201, and the upper end face of the circular big end cover 206 is respectively contacted with the lower end faces of the four pairs of restraining blocks 204 and the lower end faces of the four tangential piezoelectric crystal stacks; a II-th guide hole is formed in the center of the end face of the circular big end cover 206 in a penetrating manner; the edge of the end face of the circular big end cover 206 is provided with four pairs of IV assembly holes which are arranged along the circumferential direction in a penetrating way, and the four pairs of IV assembly holes are opposite to the four pairs of III assembly holes one by one; the lower end face of the circular big end cover 206 is provided with three II blind screw holes which are arranged equidistantly along the circumferential direction; the circular big end cover 206 and the cup-shaped supporting seat 201 jointly enclose to form an oil storage cavity, and II hydraulic oil 212 is filled in the oil storage cavity; the four pairs of I-shaped fastening screws 207 correspondingly penetrate through the four pairs of IV assembling holes and the four pairs of III assembling holes one by one, and the tail ends of the four pairs of I-shaped fastening screws 207 are correspondingly screwed in the four pairs of I-shaped blind screw holes one by one; the heads of the fourth pair of fastening screws 207 are pressed against the lower end face of the circular big end cover 206; the short pre-tightening rod 208 can be slidably and hermetically arranged in the II-th guide hole in a penetrating way; the upper end surface of the short pre-tightening rod 208 is higher than that of the circular big end cover 206; the lower end surface of the short pre-tightening rod 208 is higher than that of the circular big end cover 206; the upper end face of the small circular end cover 209 is contacted with the lower end face of the large circular end cover 206; a second adjusting screw hole is formed in the center of the end face of the small circular end cover 209 in a penetrating manner, and the aperture of the second adjusting screw hole is smaller than that of the second guide hole; the edge of the end face of the small circular end cover 209 is provided with three V-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way, and the three V-shaped assembling holes are opposite to the three II-shaped blind screw holes one by one; the three II fastening screws 210 correspondingly penetrate through the three V assembling holes one by one, and the tail ends of the three II fastening screws 210 are correspondingly screwed in the three II blind screw holes one by one; the heads of the three II fastening screws 210 are all tightly pressed on the lower end surface of the small circular end cover 209; the lower end of the second adjusting stud 211 is screwed into the second adjusting stud, and the upper end face of the second adjusting stud 211 tightly presses the lower end face of the short pre-tightening rod 208.
An I-shaped sealing ring is arranged between the side surface of the long pre-tightening rod 107 and the hole wall of the I-shaped guide hole; a second sealing ring is arranged between the side surface of the short pre-tightening rod 208 and the hole wall of the second guide hole; a third sealing ring is arranged between the upper end surface of the circular big end cover 206 and the cup edge of the cup-shaped supporting seat 201.
The upper outer end face of the cup-shaped supporting seat 201 and the lower outer end face of the disc-shaped radiating block 101 are coaxially fixed through an insulating glue layer.
An I inner square blind hole is formed in the upper end face of the I adjusting stud 112; the lower end surface of the II-th adjusting stud 211 is provided with an II-th inner square blind hole.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (4)
1. An axial tangential combined ultrasonic transducer, characterized in that: comprises an axial ultrasonic vibrator and a tangential ultrasonic vibrator;
the axial ultrasonic vibrator comprises a cake-shaped radiation block (101), a circular ring-shaped pitch disc (102), an insulating sleeve (103), an axial piezoelectric crystal stack, a circular ring-shaped radiation block (106), a long pre-tightening rod (107), a circular pressing plate (108), three connecting screw rods (109), three I-shaped locking nuts (110), three II-shaped locking nuts (111) and an I-shaped adjusting stud (112);
the round-cake-shaped radiating block (101) is of a hollow structure; the lower end wall and the side wall of the round cake-shaped radiation block (101) are thick walls; the upper end wall of the round cake-shaped radiation block (101) is a thin wall; the edge of the lower outer end face of the round cake-shaped radiation block (101) is provided with four pairs of I-th blind screw holes which are arranged along the circumferential direction; the center of the upper end wall of the round cake-shaped radiation block (101) is provided with an I-shaped guide hole in a through way; i hydraulic oil (113) is filled in the inner cavity of the round-cake-shaped radiation block (101); the inner side surface of the circular ring-shaped festival disk (102) and the middle-upper part of the outer side surface of the circular cake-shaped radiation block (101) are fixed into a whole; the end surface of the circular ring-shaped section disc (102) is provided with three I-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way; the lower end face of the insulating sleeve (103) is in contact with the inner edge of the upper outer end face of the disc-shaped radiating block (101), and the inner side face of the insulating sleeve (103) is flush with the hole wall of the guide hole I; the axial piezoelectric crystal stack is formed by alternately laminating four annular copper electrode plates (104) and four piezoelectric ceramic circular rings (105) from top to bottom; the axial piezoelectric crystal stack is sleeved on the outer side surface of the insulating sleeve (103), and two end surfaces of the axial piezoelectric crystal stack are respectively flush with two end surfaces of the insulating sleeve (103); the lower end face of the annular radiation block (106) is respectively contacted with the upper end face of the axial piezoelectric crystal stack and the upper end face of the insulating sleeve (103), and the inner side face of the annular radiation block (106) is flush with the inner side face of the insulating sleeve (103); the long pre-tightening rod (107) can be slidably and hermetically arranged in the guide hole I, the insulating sleeve (103) and the annular radiation block (106); the lower end surface of the long pre-tightening rod (107) is lower than the upper inner end surface of the round cake-shaped radiation block (101); the upper end surface of the long pre-tightening rod (107) is lower than the upper end surface of the circular ring-shaped radiation block (106); a circular limiting groove is formed in the center of the lower end face of the circular pressing plate (108); the wall of the circular limiting groove is contacted with the upper end of the outer side surface of the circular ring-shaped radiation block (106); the bottom of the round limiting groove is contacted with the upper end surface of the circular ring-shaped radiation block (106); an I-shaped adjusting screw hole is formed between the center of the bottom of the circular limiting groove and the center of the upper end face of the circular pressing plate (108) in a penetrating manner, and the aperture of the I-shaped adjusting screw hole is smaller than the inner diameter of the annular radiation block (106); the outer edge of the end face of the circular pressing plate (108) is provided with three II assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way, and the three II assembling holes are opposite to the three I assembling holes one by one; the lower ends of the three connecting screw rods (109) penetrate through the three I assembling holes in a one-to-one correspondence manner; the upper ends of the three connecting screw rods (109) penetrate through the three II assembling holes in a one-to-one correspondence manner; the three I-shaped locking nuts (110) are screwed at the lower ends of the three connecting screw rods (109) in a one-to-one correspondence manner, and the three I-shaped locking nuts (110) are all tightly pressed on the lower end surface of the circular ring-shaped section disc (102); the three II locking nuts (111) are screwed at the upper ends of the three connecting screw rods (109) in a one-to-one correspondence manner, and the three II locking nuts (111) press the upper end face of the circular pressing plate (108) tightly; the upper end of the I-th adjusting stud (112) is screwed in the I-th adjusting screw hole, and the lower end face of the I-th adjusting stud (112) is tightly pressed on the upper end face of the long pre-tightening rod (107);
the tangential ultrasonic vibrator comprises a cup-shaped supporting seat (201), four tangential piezoelectric crystal stacks, four pairs of constraint blocks (204), four matching blocks (205), a circular large end cover (206), four pairs of I fastening screws (207), a short pre-tightening rod (208), a circular small end cover (209), three II fastening screws (210) and an II adjusting stud (211);
the cup-shaped supporting seat (201) comprises a circular cup-shaped main body with a downward cup opening and eight cup-shaped convex parts which are arranged on the radial outer side of the circular cup-shaped main body in an extending mode and have downward cup openings; the inner cavities of the eight cup-shaped bulges are communicated with the inner cavity of the round cup-shaped main body, and the eight cup-shaped bulges are arranged along the circumferential direction; the upper end wall and the side wall of the round cup-shaped main body and the upper end walls of the eight cup-shaped bulges are thick walls; the side walls of the eight cup-shaped bulges are thin walls; an installation groove is formed between every two adjacent cup-shaped convex parts; the four mounting grooves are wide mounting grooves, the other four mounting grooves are narrow mounting grooves, and the four wide mounting grooves and the four narrow mounting grooves are distributed in a staggered mode along the circumferential direction; the upper outer end face of the cup-shaped supporting seat (201) and the lower outer end face of the disc-shaped radiating block (101) are coaxially fixed and are mutually insulated; each tangential piezoelectric crystal stack is formed by stacking three rectangular copper electrode plates (202) and two piezoelectric ceramic squares (203) in a staggered manner along the tangential direction; the four pairs of constraint blocks (204) are distributed on the two tangential sides of the four tangential piezoelectric crystal stacks in a one-to-one correspondence manner, and the four pairs of constraint blocks (204) and the four tangential piezoelectric crystal stacks are tightly embedded in the four wide mounting grooves in a one-to-one correspondence manner; the upper end surfaces of the four pairs of restraint blocks (204) and the upper end surfaces of the four tangential piezoelectric crystal stacks are in contact with the lower outer end surface of the cake-shaped radiation block (101); the end surfaces of the four pairs of constraint blocks (204) are correspondingly provided with four pairs of III assembling holes in a penetrating way, and the four pairs of III assembling holes are opposite to the four pairs of I blind screw holes one by one; the four matching blocks (205) are tightly embedded in the four narrow mounting grooves in a one-to-one correspondence manner; the circular big end cover (206) is covered on the cup opening of the cup-shaped supporting seat (201), and the upper end surface of the circular big end cover (206) is respectively contacted with the lower end surfaces of the four pairs of restraining blocks (204) and the lower end surfaces of the four tangential piezoelectric crystal stacks; a II-th guide hole is formed in the center of the end face of the round large end cover (206) in a penetrating manner; the edge of the end face of the circular big end cover (206) is provided with four pairs of IV assembly holes which are arranged along the circumferential direction in a penetrating way, and the four pairs of IV assembly holes are opposite to the four pairs of III assembly holes one by one; the lower end face of the circular big end cover (206) is provided with three II blind screw holes which are arranged at equal intervals along the circumferential direction; the circular big end cover (206) and the cup-shaped supporting seat (201) jointly enclose to form an oil storage cavity, and II hydraulic oil (212) is filled in the oil storage cavity; the four pairs of I-shaped fastening screws (207) correspondingly penetrate through the four pairs of IV assembly holes and the four pairs of III assembly holes one by one, and the tail ends of the four pairs of I-shaped fastening screws (207) are correspondingly screwed in the four pairs of I-shaped blind screw holes one by one; the heads of the fourth I fastening screws (207) are pressed against the lower end face of the round big end cover (206); the short pre-tightening rod (208) can be slidably and hermetically arranged in the II-th guide hole in a penetrating way; the upper end face of the short pre-tightening rod (208) is higher than that of the circular large end cover (206); the lower end face of the short pre-tightening rod (208) is higher than that of the round large end cover (206); the upper end face of the small circular end cover (209) is contacted with the lower end face of the large circular end cover (206); a second adjusting screw hole is formed in the center of the end face of the small circular end cover (209) in a penetrating manner, and the aperture of the second adjusting screw hole is smaller than that of the second guide hole; the edge of the end face of the small circular end cover (209) is provided with three V-shaped assembling holes which are arranged at equal intervals along the circumferential direction in a penetrating way, and the three V-shaped assembling holes are opposite to the three II-shaped blind screw holes one by one; the three II fastening screws (210) correspondingly penetrate through the three V assembling holes one by one, and the tail ends of the three II fastening screws (210) are correspondingly screwed in the three II blind screw holes one by one; the heads of the three II fastening screws (210) are all tightly pressed on the lower end surface of the round small end cover (209); the lower end of the II-th adjusting stud (211) is screwed in the II-th adjusting screw hole, and the upper end face of the II-th adjusting stud (211) is tightly pressed on the lower end face of the short pre-tightening rod (208).
2. The axial-tangential composite ultrasonic transducer of claim 1, wherein: an I-shaped sealing ring is arranged between the side surface of the long pre-tightening rod (107) and the hole wall of the I-shaped guide hole; a second sealing ring is arranged between the side surface of the short pre-tightening rod (208) and the hole wall of the second guide hole; a III sealing ring is arranged between the upper end surface of the circular big end cover (206) and the cup edge of the cup-shaped supporting seat (201).
3. The axial-tangential composite ultrasonic transducer of claim 1, wherein: the upper outer end face of the cup-shaped supporting seat (201) and the lower outer end face of the disc-shaped radiating block (101) are coaxially fixed through an insulating glue layer.
4. The axial-tangential composite ultrasonic transducer of claim 1, wherein: an I inner square blind hole is formed in the upper end face of the I adjusting stud (112); the lower end face of the II-th adjusting stud (211) is provided with an II-th inner square blind hole.
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| CN108696175A (en) * | 2017-03-31 | 2018-10-23 | 精工爱普生株式会社 | Piexoelectric actuator and its driving method, robot, electronic component handling apparatus |
| CN109256982A (en) * | 2018-11-14 | 2019-01-22 | 广东工业大学 | A kind of piezoelectric drive motors |
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| US20160303360A1 (en) * | 2015-04-15 | 2016-10-20 | Actuated Medical, Inc. | Ultrasonic Transducer and Transdermal Delivery System |
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|---|---|---|---|---|
| CN2555587Y (en) * | 2002-05-30 | 2003-06-11 | 邱海波 | Piezoelectric supersonic micromotor |
| CN108696175A (en) * | 2017-03-31 | 2018-10-23 | 精工爱普生株式会社 | Piexoelectric actuator and its driving method, robot, electronic component handling apparatus |
| CN109256982A (en) * | 2018-11-14 | 2019-01-22 | 广东工业大学 | A kind of piezoelectric drive motors |
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