阅读说明：本技术 一种超声振动给料器 (Ultrasonic vibration feeder ) 是由 李志荣 郭建东 陈记牢 王利博 廖庆华 郄伟 尹瑞峰 于 2019-04-01 设计创作，主要内容包括：本发明公开了一种超声振动给料器。该超声振动给料器包括：超声波发生器和给料主体；超声波发生器与给料主体电连接；超声波发生器用于为给料主体施加超声频率的交流电压；给料主体包括弹性体头部、弹性体中部、弹性体尾部、第一组压电陶瓷片、第二组压电陶瓷片、第三组压电陶瓷片和工作面；弹性体头部的第一端与工作面固定连接,第二端通过第一组压电陶瓷片与弹性体中部的第一端固定连接；弹性体中部的第二端依次通过第二组压电陶瓷片和第三组压电陶瓷片与弹性体尾部的第一端固定连接。本发明能够降低振动和噪声,提高在处理颗粒或粉状物料时,给料量的精确度。(The invention discloses an ultrasonic vibration feeder. The ultrasonic vibration feeder includes: an ultrasonic generator and a feed body; the ultrasonic generator is electrically connected with the feeding main body; the ultrasonic generator is used for applying an alternating voltage with ultrasonic frequency to the feeding body; the feeding main body comprises an elastomer head, an elastomer middle part, an elastomer tail part, a first group of piezoelectric ceramic pieces, a second group of piezoelectric ceramic pieces, a third group of piezoelectric ceramic pieces and a working surface; the first end of the head of the elastic body is fixedly connected with the working surface, and the second end of the head of the elastic body is fixedly connected with the first end of the middle part of the elastic body through the first group of piezoelectric ceramic plates; the second end of the middle part of the elastic body is fixedly connected with the first end of the tail part of the elastic body through the second group of piezoelectric ceramic pieces and the third group of piezoelectric ceramic pieces in sequence. The invention can reduce vibration and noise and improve the accuracy of feeding quantity when processing granular or powdery materials.)

1. An ultrasonic vibratory feeder, comprising: an ultrasonic generator and a feed body; the ultrasonic generator is electrically connected with the feeding main body; the ultrasonic generator is used for applying an alternating voltage with ultrasonic frequency to the feeding body;

the feeding main body comprises an elastomer head, an elastomer middle part, an elastomer tail part, a first group of piezoelectric ceramic pieces, a second group of piezoelectric ceramic pieces, a third group of piezoelectric ceramic pieces and a working surface; the first end of the head of the elastic body is fixedly connected with the working surface, and the second end of the head of the elastic body is fixedly connected with the first end of the middle part of the elastic body through the first group of piezoelectric ceramic plates; and the second end of the middle part of the elastic body is fixedly connected with the first end of the tail part of the elastic body sequentially through the second group of piezoelectric ceramic pieces and the third group of piezoelectric ceramic pieces.

2. The ultrasonic vibration feeder of claim 1, wherein the second end of the elastomeric head is fixedly attached to the upper pole face of the first set of piezoceramic wafers; and the first end of the middle part of the elastic body is fixedly connected with the lower pole surface of the first group of piezoelectric ceramic pieces.

3. The ultrasonic vibratory feeder of claim 2, wherein the polarity of the upper pole surface of the first group of piezoceramic wafers is positive.

4. The ultrasonic vibration feeder according to claim 1, wherein the second end of the middle portion of the elastic body is fixedly connected to the upper pole surface of the second group of piezoelectric ceramic plates; the lower pole surface of the second group of piezoelectric ceramic pieces is fixedly connected with the upper pole surface of the third group of piezoelectric ceramic pieces; and the lower pole surface of the third group of piezoelectric ceramic plates is fixedly connected with the first end of the tail part of the elastic body.

5. The ultrasonic vibration feeder of claim 4, wherein the upper pole surface of the second group of piezoceramic wafers comprises a first zone and a second zone; the first partition and the second partition are divided by a first partition line; the polarity of the first partition is a positive electrode, and the polarity of the second partition is a negative electrode;

the upper pole surface of the third group of piezoelectric ceramic plates comprises a third subarea and a fourth subarea; the third partition and the fourth partition are divided by a second partition line; the polarity of the third partition is a positive electrode, and the polarity of the fourth partition is a negative electrode;

the included angle between the first partition line and the second partition line is 90 degrees.

6. The ultrasonic vibration feeder of claim 1, wherein the first group of piezoceramic wafers generates a first-order longitudinal vibration mode when the ultrasonic generator applies an alternating current voltage of a first ultrasonic frequency to the first group of piezoceramic wafers; when the ultrasonic generator applies alternating-current voltage with second ultrasonic frequency to the second group of piezoelectric ceramic pieces, the second group of piezoelectric ceramic pieces generate a second-order bending vibration mode b; and when the ultrasonic generator applies alternating-current voltage of a third ultrasonic frequency to the third group of piezoelectric ceramic pieces, the third group of piezoelectric ceramic pieces generate a second-order bending vibration mode a.

7. An ultrasonic vibratory feeder as set forth in claim 6 wherein the first ultrasonic frequency, the second ultrasonic frequency, and the third ultrasonic frequency are the same magnitude.

8. An ultrasonic vibratory feeder as set forth in claim 1 wherein said elastomeric head portion, said elastomeric midsection, and said elastomeric tail portion are all metal.

9. An ultrasonic vibratory feeder as set forth in claim 8 wherein said elastomeric head portion, said elastomeric mid portion and said elastomeric tail portion are all copper.

10. An ultrasonic vibratory feeder as in claim 8 wherein the elastomeric head is formed of copper and the elastomeric midsection and the elastomeric tail are formed of steel.

Technical Field

The invention relates to the technical field of vibratory feeders, in particular to an ultrasonic vibratory feeder.

Background

The vibratory feeder uniformly or quantitatively supplies materials from a material storage device to a material receiving device, and is widely applied to industries such as metallurgy, mines, chemical industry, grain, machinery and the like. At present, the vibratory feeders usually used are electromagnetic vibratory feeders which work in the audio frequency range and therefore have high vibration, high noise and large volume, and the feeding accuracy is limited especially when handling granular or powdery materials.

Disclosure of Invention

In view of this, there is a need for an ultrasonic vibratory feeder that reduces vibration and noise and improves the accuracy of the amount of material being fed while handling granular or powdered materials.

In order to achieve the purpose, the invention provides the following scheme:

an ultrasonic vibratory feeder comprising: an ultrasonic generator and a feed body; the ultrasonic generator is electrically connected with the feeding main body; the ultrasonic generator is used for applying an alternating voltage with ultrasonic frequency to the feeding body;

the feeding main body comprises an elastomer head, an elastomer middle part, an elastomer tail part, a first group of piezoelectric ceramic pieces, a second group of piezoelectric ceramic pieces, a third group of piezoelectric ceramic pieces and a working surface; the first end of the head of the elastic body is fixedly connected with the working surface, and the second end of the head of the elastic body is fixedly connected with the first end of the middle part of the elastic body through the first group of piezoelectric ceramic plates; and the second end of the middle part of the elastic body is fixedly connected with the first end of the tail part of the elastic body sequentially through the second group of piezoelectric ceramic pieces and the third group of piezoelectric ceramic pieces.

Optionally, the second end of the elastic body head is fixedly connected with the upper pole face of the first group of piezoelectric ceramic plates; and the first end of the middle part of the elastic body is fixedly connected with the lower pole surface of the first group of piezoelectric ceramic pieces.

Optionally, the polarity of the upper pole surface of the first group of piezoelectric ceramic plates is positive.

Optionally, the second end of the middle part of the elastic body is fixedly connected with the upper pole face of the second group of piezoelectric ceramic pieces; the lower pole surface of the second group of piezoelectric ceramic pieces is fixedly connected with the upper pole surface of the third group of piezoelectric ceramic pieces; and the lower pole surface of the third group of piezoelectric ceramic plates is fixedly connected with the first end of the tail part of the elastic body.

Optionally, the upper pole surface of the second group of piezoelectric ceramic plates includes a first partition and a second partition; the first partition and the second partition are divided by a first partition line; the polarity of the first partition is a positive electrode, and the polarity of the second partition is a negative electrode;

the upper pole surface of the third group of piezoelectric ceramic plates comprises a third subarea and a fourth subarea; the third partition and the fourth partition are divided by a second partition line; the polarity of the third partition is a positive electrode, and the polarity of the fourth partition is a negative electrode;

the included angle between the first partition line and the second partition line is 90 degrees.

Optionally, when the ultrasonic generator applies an alternating-current voltage with a first ultrasonic frequency to the first group of piezoelectric ceramic plates, the first group of piezoelectric ceramic plates generate a first-order longitudinal vibration mode; when the ultrasonic generator applies alternating-current voltage with second ultrasonic frequency to the second group of piezoelectric ceramic pieces, the second group of piezoelectric ceramic pieces generate a second-order bending vibration mode b; and when the ultrasonic generator applies alternating-current voltage of a third ultrasonic frequency to the third group of piezoelectric ceramic pieces, the third group of piezoelectric ceramic pieces generate a second-order bending vibration mode a.

Optionally, the first ultrasonic frequency, the second ultrasonic frequency and the third ultrasonic frequency are the same in magnitude.

Optionally, the material of the elastomer head, the elastomer middle part and the elastomer tail is metal.

Optionally, the material of the elastic body head part, the elastic body middle part and the elastic body tail part is copper.

Optionally, the head of the elastic body is made of copper, and the middle of the elastic body and the tail of the elastic body are made of steel.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides an ultrasonic vibration feeder. The ultrasonic vibration feeder includes: an ultrasonic generator and a feed body; the ultrasonic generator is electrically connected with the feeding main body; the ultrasonic generator is used for applying an alternating voltage with ultrasonic frequency to the feeding body; the feeding main body comprises an elastomer head, an elastomer middle part, an elastomer tail part, a first group of piezoelectric ceramic pieces, a second group of piezoelectric ceramic pieces, a third group of piezoelectric ceramic pieces and a working surface; the first end of the head of the elastic body is fixedly connected with the working surface, and the second end of the head of the elastic body is fixedly connected with the first end of the middle part of the elastic body through the first group of piezoelectric ceramic plates; the second end of the middle part of the elastic body is fixedly connected with the first end of the tail part of the elastic body through the second group of piezoelectric ceramic pieces and the third group of piezoelectric ceramic pieces in sequence. The ultrasonic vibration feeder overcomes the defects that the prior electromagnetic vibration feeder works in an audio frequency range, has large vibration, high noise and larger volume, and has limited feeding quantity accuracy when processing particles or powdery materials, the working frequency of the ultrasonic vibration feeder is in an ultrasonic frequency range, has no noise, and the amplitude is in a micron order, so that the ultrasonic vibration feeder hardly senses the vibration, can reduce the vibration and the noise, and improve the feeding quantity accuracy when processing the particles or the powdery materials.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic view of a feed body of an ultrasonic vibratory feeder according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a feeding main body, a first group of piezoelectric ceramic pieces, a second group of piezoelectric ceramic pieces and a third group of piezoelectric ceramic pieces in coordinate axes according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a second-order bending mode a, a second-order bending mode b, and a first-order longitudinal vibration mode c according to an embodiment of the present invention;

FIG. 4 is a workpiece transportation diagram of the second-order bending vibration mode a and the first-order longitudinal vibration mode c in a composite mode according to the embodiment of the present invention;

FIG. 5 is a workpiece transportation diagram of the second-order bending vibration mode b and the first-order longitudinal vibration mode c in a composite mode according to the embodiment of the present invention;

FIG. 6 is a diagram illustrating the operation of the ultrasonic vibration feeder according to the embodiment of the present invention in an automatic manufacturing line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The ultrasonic vibration feeder of the embodiment comprises: an ultrasonic generator and a feed body; the ultrasonic generator is electrically connected with the feeding main body; the ultrasonic generator is used for applying an alternating voltage with ultrasonic frequency to the feeding body. The feeding body can be regarded as a langevin vibrator.

FIG. 1 is a schematic view of a feeding body of an ultrasonic vibration feeder according to an embodiment of the present invention. Referring to fig. 1, the feeding main body comprises an elastomer head 1, an elastomer middle 2, an elastomer tail 3, a first group of piezoelectric ceramic plates 4, a second group of piezoelectric ceramic plates 5, a third group of piezoelectric ceramic plates 6 and a working surface 7; the first end of the elastic body head part 1 is fixedly connected with the working surface 7, and the second end of the elastic body head part is fixedly connected with the first end of the elastic body middle part 2 through the first group of piezoelectric ceramic pieces 4; the second end of the middle part 2 of the elastic body is fixedly connected with the first end of the tail part 3 of the elastic body through the second group of piezoelectric ceramic pieces 5 and the third group of piezoelectric ceramic pieces 6 in sequence. The elastic body head part 1, the elastic body middle part 2 and the elastic body tail part 3 are used for transferring and amplifying deformation generated by the piezoelectric ceramic plate, so that the working surface 7 has larger displacement or amplitude.

In this embodiment, the head 1 of the elastic body, the middle 2 of the elastic body, the tail 3 of the elastic body, the first group of piezoelectric ceramic plates 4, the second group of piezoelectric ceramic plates 5, the third group of piezoelectric ceramic plates 6 and the working surface 7 are fastened together by bolts 8.

In this embodiment, the second end of the elastic body head 1 is fixedly connected with the upper pole surface of the first group of piezoelectric ceramic pieces 4; the first end of the middle part 2 of the elastic body is fixedly connected with the lower pole surface of the first group of piezoelectric ceramic pieces 4. The polarity of the upper pole surface of the first group of piezoelectric ceramic pieces 4 is positive.

In this embodiment, the second end of the middle part 2 of the elastic body is fixedly connected with the upper pole surface of the second group of piezoelectric ceramic pieces 5; the lower pole surface of the second group of piezoelectric ceramic pieces 5 is fixedly connected with the upper pole surface of the third group of piezoelectric ceramic pieces 6; and the lower pole surface of the third group of piezoelectric ceramic plates 6 is fixedly connected with the first end of the tail part 3 of the elastic body.

In this embodiment, the upper pole surface of the second group of piezoelectric ceramic pieces 5 includes a first partition and a second partition; the first partition and the second partition are divided by a first partition line; the polarity of the first partition is a positive electrode, and the polarity of the second partition is a negative electrode.

The upper pole surface of the third group of piezoelectric ceramic plates 6 comprises a third subarea and a fourth subarea; the third partition and the fourth partition are divided by a second partition line; the polarity of the third partition is a positive electrode, and the polarity of the fourth partition is a negative electrode.

The included angle between the first partition line and the second partition line is 90 degrees.

In order to better represent the partition and polarization direction of the three groups of piezoelectric ceramic plates, which are represented by a coordinate system, fig. 2 is a schematic structural diagram of the feeding main body, the first group of piezoelectric ceramic plates, the second group of piezoelectric ceramic plates and the third group of piezoelectric ceramic plates in coordinate axes according to the embodiment of the present invention. Wherein part (a) in fig. 2 represents a structural view of the feed body in the coordinate axis, part (b) in fig. 2 represents a structural view of the first group of piezoelectric ceramic plates in the coordinate axis, part (c) in fig. 2 represents a structural view of the second group of piezoelectric ceramic plates in the coordinate axis, and part (d) in fig. 2 represents a structural view of the third group of piezoelectric ceramic plates in the coordinate axis.

In this embodiment, when the ultrasonic generator applies an ac voltage with a first ultrasonic frequency to the first group of piezoelectric ceramic pieces 4, the first group of piezoelectric ceramic pieces 4 generate a first-order longitudinal vibration mode c; when the ultrasonic generator applies alternating voltage with a second ultrasonic frequency to the second group of piezoelectric ceramic pieces 5, the second group of piezoelectric ceramic pieces 5 generate a second-order bending vibration mode b; when the ultrasonic generator applies an alternating voltage of a third ultrasonic frequency to the third group of piezoelectric ceramic pieces 6, the third group of piezoelectric ceramic pieces 6 generate a second-order bending vibration mode a. The first ultrasonic frequency, the second ultrasonic frequency and the third ultrasonic frequency are the same in size, and the same ultrasonic frequency is used as the working frequency of the ultrasonic vibration feeder. In order to obtain the best excitation effect, the second group of piezoelectric ceramic plates 5 and the third group of piezoelectric ceramic plates 6 are arranged at the peak or trough plane of the second-order bending vibration mode, and the first group of piezoelectric ceramic plates 4 are arranged at the nodal plane of the first-order longitudinal vibration mode. The second-order bending vibration mode a, the second-order bending vibration mode b and the first-order longitudinal vibration mode c are shown in fig. 3. In which part (a) in fig. 3 shows a mode shape diagram of a second-order bending mode a, part (b) in fig. 3 shows a mode shape diagram of a second-order bending mode b, and part (c) in fig. 3 shows a mode shape diagram of a first-order longitudinal mode c.

As an alternative embodiment, the material of the elastomer head 1, the elastomer middle 2 and the elastomer tail 3 is metal.

As an alternative embodiment, the material of the elastomer head 1, the elastomer middle 2 and the elastomer tail 3 is copper.

As an alternative embodiment, the material of the elastomer head 1 is copper, and the material of the elastomer middle 2 and the elastomer tail 3 are both steel.

The working principle of the ultrasonic vibration feeder will be described below.

When the ultrasonic generator applies excitation voltages with the same ultrasonic frequency (i.e., modal frequency or working frequency) and a phase difference of 90 ° to the third group of piezoelectric ceramic plates 6 and the first group of piezoelectric ceramic plates 4, a second-order bending vibration mode a and a first-order longitudinal vibration mode c are excited simultaneously, as shown in fig. 3, the two modes are synthesized, so that an elliptical motion is formed on the working surface 7 of the vibration feeder, and the workpiece (i.e., the conveyed material) is driven to move in the y direction, thereby realizing the conveying (or feeding) of the workpiece, as shown in fig. 4. Similarly, when excitation voltages with the same ultrasonic frequency and a phase difference of 90 ° are simultaneously applied to the second group of piezoelectric ceramic plates 5 and the first group of piezoelectric ceramic plates 4, the conveyance (or feeding) of the workpiece in the x direction can be realized, as shown in fig. 5. Therefore, the ultrasonic vibration feeder can realize bidirectional feeding.

An example of the use of an ultrasonic vibratory feeder in a practical application is provided below. As shown in fig. 6, the ultrasonic vibration feeder may be understood as being applied to an automatic manufacturing line. The feeder conveys the workpiece to the conveyer belt, and the conveyer belt conveys the workpiece to the next station.

The ultrasonic vibration feeder of the embodiment can be used for not only bulk materials (such as mechanical parts and the like) but also granular and powdery materials. The feeder theme structure in the embodiment has a series of advantages of simple and compact structure, fast response, good control performance, no magnetic field generation, no magnetic field interference, low-noise operation and the like, thereby having wide application prospects in various industries. For example, if the feeder is used for feeding granular or powdery materials, accurate feeding can be realized due to the characteristics of quick response and good controllability of the feeder. Therefore, the accurate batching can be realized by using a plurality of feeders, and the feeder has application value in the fields of chemical industry, medicine and the like.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.