Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
  • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
  • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
  • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
  • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
  • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
  • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
  • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
  • B06B1/0611—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile
  • B06B1/0618—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile of piezo- and non-piezoelectric elements, e.g. 'Tonpilz'

Definitions

• the invention relates to an ultrasound generator with a first and a second piezoceramic plate adjacent to this.
• a piezoelectric transducer for mounting a magnetic head on a rotating part of a guide drum in an image recording device in which two oppositely polarized elongated piezoelectric elements between an inner electrode connected to a first voltage and two with one second voltage connected external electrodes are attached.
• two oppositely polarized elongated piezoelectric elements between an inner electrode connected to a first voltage and two with one second voltage connected external electrodes are attached.
• a detector for acoustic emissions is known from DE-A-27 47 309. This has a piezoelectric element with pairs of electrodes arranged on opposite sides. The piezoelectric element is arranged within a holder which has an acoustic window on one side of the piezoelectric element. The piezoelectric element is held firmly in position between two electrically insulating disks. In order to absorb undesired acoustic reflections and to serve as a reaction mass, a damping block member is provided which acts on the piezoelectric element with the aid of a spring and a cap via the electrical insulation opposite the window.
• the object of the invention is to provide an ultrasound generator of the type described at the outset, which is capable of emitting a high level of ultrasound energy and can be used as such as a hand-held device. So that the device can be used universally, according to a further development of the invention, the generator head should be exchangeable for adaptation to the application purpose.
• the object is achieved by the ultrasound generator characterized in claim 1.
• FIG. 1 shows a section through the ultrasound generator with a first generator head.
• Fig. 3 shows a third associated generator head.
• the ultrasound generator 1 has a first piezoceramic plate 2 and a second piezoceramic plate 3 which is adjacent to it and oppositely directed.
• a conductive plate preferably a bronze plate 4 which extends over the entire surface of the plates and serves as the first electrode.
• a second electrode 5 in the form of such a bronze plate is arranged on the surface of the first piezoceramic plate opposite the first bronze plate.
• the two plates are connected to lead wires connected to a corresponding power supply.
• the two ceramic plates are designed as round plates.
• a metal body designed as a generator head base body 8 which is preferably made of the same metal as the body 6 and which is also cylindrical to match the cross-sectional shape of the ceramic disks, directly adjoins the second ceramic plate.
• the generator head base body has an axial bore 9 on its side facing the body 6.
• the ceramic discs and the two bronze plates also have corresponding axial bores.
• a cap screw 10 is screwed through the body 6, the bronze plates and the ceramic plates into the generator head base body 8 in such a way that the body 6 and the generator head base body 8 be pressed under tension against the ceramic plates.
• the holes through the two ceramic plates and the bronze plate 4 are chosen so large that they are at a distance from the shaft of the screw 10 and an insulating sleeve 10 'is provided between them and the screw.
• the bore of the bronze plate 5 and the body 5, however, can be smaller. In any case, an electrical contact is made via the body 6 and the screw 10 resting thereon, which electrically connects the body 5 and the generator head base body 8 to one another and thus to the second electrode 5.
• the generator has a generator housing 11 which encloses the body 6, the ceramic plates, the bronze plates and the wires connected to them. So that as little vibration as possible is transmitted to the generator housing 11, this is connected by means of screws 12 via the second bronze plate 5 projecting outward beyond the body ⁇ .
• the connection between the vibrating part of the generator and the housing has thus been made at the point at which the amplitude of the vibrations in the actual generator block is the smallest. In this way it is achieved that the housing is essentially without vibration.
• the housing has a corresponding opening 13 on its bottom side for inserting the voltage supply lines.
• the generator head base body 8 has, on its end facing away from the ceramic plates, a cylindrical extension 14 projecting outwards from it with an external thread.
• the universal hand-held device includes a plurality of generator heads 15, 16, 17. These have on their base side opposite the actual excitation surface 18, 19 each have a cylindrical recess 21, 22 with an internal thread corresponding to the cylindrical extension 14, with the help of which they can be firmly screwed onto the generator head base body 8 in the manner shown in FIG. 1.
• the different generator heads each have one
• the generator head 15 shown in FIG. 1 is designed such that it forms a cylinder with the generator head base body 8 without an air gap therebetween, so that all of the energy is transmitted completely.
• This embodiment is particularly suitable for introducing ultrasound energy into a liquid.
• the generator head shown in FIG. 2 has an undercut recess 23 following the thread inside, which serves to form an air gap between the front surface of the base body 8 and the generator head.
• this generator head is particularly suitable for spraying liquid applied to the excitation surface 19, such as, for. B. Color suitable.
• the generator head 17 shown in FIG. 3 also has a recess 23 for forming an air gap.
• the generator head has a channel-shaped bore 24 which extends to the axis of symmetry of the head and extends along this, which is connected on the base side to a transverse bore 25, which in turn can be connected to a liquid supply line via an internal thread 26.
• the generator head tapers towards the excitation surface 20. This generator head is particularly suitable for spraying and atomizing liquids.
• the housing 11 has an external thread 27 at its end facing the generator head base body, the dimensioning of which is selected such that it fits into a Fig. 1 schematically indicated water pipe, for example after unscrewing the tap from such, can be screwed into an existing thread.
• the device can be used to clean a water pipe or at least a section thereof by the introduction of ultrasound energy.
• the device can also be immersed in other liquid containers with the generator head 15 and in this way enter ultrasonic energy into such a container filled with liquid. In this way, the device can be used, for example, to clean tools or household items and the like.
• the generator head shown in Fig. 1 is also for
• Material removal can be used in particular from metallic and plastic objects.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Apparatuses For Generation Of Mechanical Vibrations (AREA)
• Surgical Instruments (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6369760

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (8)

• 1988
  • 1988-12-21 DE DE19883843109 patent/DE3843109C1/de not_active Expired - Fee Related
• 1989
  • 1989-12-19 EP EP19900900848 patent/EP0401349A1/de not_active Withdrawn
  • 1989-12-19 WO PCT/EP1989/001568 patent/WO1990006816A1/de not_active Application Discontinuation
  • 1989-12-20 YU YU241389A patent/YU241389A/sh unknown
  • 1989-12-21 CS CS897296A patent/CS729689A2/cs unknown

Non-Patent Citations (1)

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