CN103101101A - Block forming vibration exciter based on chaotic vibration - Google Patents

Abstract

The invention discloses a block forming vibrator based on chaotic vibration, which comprises a box, and inside the box are two sets of vibrating mechanisms with the same structure and arranged symmetrically in parallel; the vibrating mechanism includes an eccentric shaft, the eccentric shaft includes first, second, third, fourth, fifth and sixth eccentric cylinders, and the first, second, third, fourth, fifth and sixth eccentric cylinders are integrated fixed connection; rolling bearings are respectively installed on both sides of the third and fifth eccentric cylinders, and an eccentric turntable is set on the outer side of the rolling bearings, and an interference fit is formed between the rolling bearings and the eccentric turntable; the first eccentric cylinder is mounted on A pulley is provided, and the pulley is driven to rotate by a driving motor through a conveyor belt, and the rotation directions of the two pulleys are opposite. The invention can effectively improve the compactness of blocks and obtain better molding quality.

Description

A Block Forming Vibrator Based on Chaotic Vibration

technical field

The invention relates to a vibrator, in particular to a chaotic vibration-based block forming vibrator.

Background technique

Block is a low-energy and widely-used new building masonry structure material that does not use clay as raw material and does not need to be fired into shape; High-performance block products made of waste as aggregates are of great significance to saving land, protecting the environment, utilizing resources, and saving energy. It is a major environmental protection and energy-saving new building material project that countries all over the world are actively promoting and developing. . However, due to the diversity of block raw materials and the different fixing frequencies of each material, improving the compactness of block forming has become a major problem faced by those skilled in the art.

In order to produce high-performance and wide-purpose block products, it is necessary to rely on high-performance block automatic forming machinery and equipment, such as brick machines, coal machines, cement prefabricated panels, etc., and vibration forming technology is an important part of block automatic forming machinery. The core key technology of the equipment can not only determine and represent the technical performance level of block forming machinery and equipment, but also directly determine and reflect the quality and performance results of block products, and the vibration exciter is a commonly used mechanical equipment in vibration forming technology. The vibrating mass of the exciter determines the mass of the block. At present, the exciters in my country's block forming machinery have one or more of the following shortcomings:

1. The commonly used vibrator is a mechanical inertial vibrator. Although the structure of the vibrator is simple, the exciting force is relatively small, and the amplitude and frequency are relatively simple, resulting in low strength and poor quality of the produced blocks. , although some advanced technologies can realize the function of amplitude modulation and frequency modulation, the exciter still cannot work at two or more frequencies. Block building development requirements.

2. In terms of technical control of the existing vibrators, due to limitations in design ideas, technical levels, and comprehensive manufacturing capabilities, the control methods of most vibrators are at a relatively low level, and only a few can achieve The stepless adjustment of vibration frequency, amplitude and excitation force, and the advanced technical control level requirements for instantaneous conversion of light vibration and strong vibration have restricted the rapid improvement of the technical performance and quality level of my country's block products.

3. Due to the limitation of structural design, the existing vibrator generally has technical defects such as few driving points of the vibration source and small effective coverage area of the exciting force, resulting in a small area of the vibrating table of the block forming machinery and equipment, and the obtained The compactness of the finished product is small, the error is large, and the yield of the finished product is low.

This shows that the prior art needs to be further improved and improved.

Contents of the invention

In order to avoid the disadvantages of the above-mentioned prior art, the present invention provides a block forming vibrator based on the chaotic vibration theory that can generate a wide frequency range to adapt to the vibration of different raw materials.

The technical scheme adopted in the present invention is:

A block forming vibrator based on chaotic vibrations, including a box body, two sets of vibration mechanisms with identical structures and arranged symmetrically in parallel are arranged inside the box body; the vibration mechanism includes an eccentric shaft, and the The eccentric shaft includes first, second, third, fourth, fifth and sixth eccentric cylinders, and the first, second, third, fourth, fifth and sixth eccentric cylinders are integrally connected; Rolling bearings are respectively installed on both sides of the third and fifth eccentric cylinders, and an eccentric turntable is set on the outer side of the rolling bearings, and the rolling bearing and the eccentric turntable are interference fit; a pulley is installed on the first eccentric cylinder, The pulley is driven to rotate by the drive motor through the conveyor belt, and the rotation directions of the two pulleys are opposite.

A transmission gear is set on the sixth eccentric cylinder, and the transmission gear can keep the eccentric shafts in the above-mentioned two groups of vibration mechanisms rotating at the same speed.

Two installation holes of the same size are opened on the left and right side walls of the box body, and the centers of the installation holes on the same side are on the same horizontal line, and self-aligning bearings are installed in each installation hole , the above-mentioned eccentric shaft is passed through the bearing hole of the self-aligning bearing to realize positioning.

The length of the eccentric shaft is greater than the length of the box, the first eccentric cylinder is located outside the box; part of the second eccentric cylinder is located outside the box, a part is located inside the box, and the rest of the In the bearing hole of the self-aligning bearing; the third, fourth and fifth eccentric cylinders are located inside the box; part of the sixth eccentric cylinder is located inside the box, and the other part is in the bearing hole of the above-mentioned self-aligning bearing; The second eccentric cylinder is provided with a first bearing end cover on the part outside the box body, and a first retaining ring is set on the part located inside the box body. The first bearing end cover and the first retaining ring not only realize the eccentric The axial fixation of the shaft also plays the role of torque transmission and shock absorption. The first bearing end cover is fixedly connected with the box by fastening screws; the second bearing is arranged between the sixth eccentric cylinder and the outer wall of the box. The end cover, the second bearing end cover not only realizes the axial positioning of the eccentric shaft but also plays the role of dustproof and sealing.

The drive motor is a frequency-variable speed-regulating motor, thereby meeting the requirements of frequent speed changes in the process of processing and forming different blocks.

A second retaining ring is arranged between the transmission gear, the fifth eccentric cylinder and the inner wall of the box, thereby avoiding the axial movement of the transmission gear.

The rolling bearing is a needle bearing, thereby increasing the contact area between the eccentric shaft and the eccentric turntable and the bearing, and improving the service life of the vibrator. In addition, the needle roller bearing can prevent the synchronous rotation between the eccentric turntable and the eccentric shaft, and the azimuth angle between the eccentric direction of the eccentric turntable and the eccentric shaft is always changing, so that a wide range of vibration frequency and amplitude can be generated, and the masonry can be improved. The molding density of the block.

Owing to adopting above-mentioned technical scheme, the beneficial effect that the present invention obtains is:

1. Chaotic vibration theory is a new discipline formed by the combination of chaos theory and mechanical vibration theory. The present invention applies the wide frequency domain characteristics of chaotic vibration to the exciter, which can generate additional frequencies near the main frequency of vibration. This kind of vibration exciter capable of generating wide frequency can effectively improve the compactness of blocks and obtain better molding quality.

2. The variable-frequency speed-regulating motor in the present invention can be changed in speed and frequency according to the different vibration frequencies and amplitudes required in the processing and forming of different blocks, so that the exciter can produce different vibration frequencies and improve the efficiency of block forming. Density.

3. There are two driving motors in the present invention, with many vibration sources and strong excitation force; the box body is installed on the table top of the vibration table of the block automatic forming mechanical equipment, and the effective coverage area of the excitation force is large, thereby ensuring the production The finished product has high compactness, small error and high yield.

Description of drawings

Fig. 1 is a schematic diagram of a half-section structure of the present invention.

Fig. 2 is a structural schematic diagram of the box body in the present invention.

Fig. 3 is a structural schematic diagram of the eccentric shaft in the present invention.

Fig. 4 is a schematic structural view of the eccentric turntable in the present invention.

in,

1. Pulley 2. First bearing cover 3. Box body 4. Self-aligning bearing 5. First retaining ring 6. Eccentric turntable 7. Needle roller bearing 8. Eccentric shaft 9. Transmission gear 10. Second retaining ring 11 , Second bearing cover 12, Mounting hole 13, First eccentric cylinder 14, Second eccentric cylinder 15, Third eccentric cylinder 16, Fourth eccentric cylinder 17, Fifth eccentric cylinder 18, Sixth eccentric cylinder

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.

Chaos is the regularity in the random behavior of the system, and chaotic vibration is a reciprocating non-periodic motion produced by a deterministic system that is extremely sensitive to initial conditions and has inherent randomness and long-term prediction impossibility. The study of chaotic vibrations has become a booming new field in vibration mechanics.

As shown in Figures 1 to 4, a block forming vibrator based on chaotic vibrations includes a box body 3, and inside the box body 3 there are two sets of vibration mechanisms that are identical in structure and arranged symmetrically in parallel; Described excitation mechanism comprises eccentric shaft 8, and the length of described eccentric shaft 8 is greater than the length of box body 3, and the left and right side walls of described box body 3 are provided with two mounting holes 12 of the same size, located in The centers of the mounting holes 12 on the same side are on the same horizontal line, and a self-aligning bearing 4 is installed in each of the mounting holes 12, and the above-mentioned eccentric shaft 8 is penetrated in the bearing hole of the self-aligning bearing 4 to realize positioning; The eccentric shaft 8 includes first, second, third, fourth, fifth and sixth eccentric cylinders, the first eccentric cylinder 13 is located outside the box 3; a part of the second eccentric cylinder 14 is located in the box On the outside of the body 3, a part is located inside the box body 3, and the rest of the part is penetrated in the bearing hole of the self-aligning bearing 4; the third, fourth and fifth eccentric cylinders are located inside the box body 3; the sixth Part of the eccentric cylinder 18 is located inside the box body 3, and the other part is in the bearing hole of the above-mentioned self-aligning bearing 4; The inner part is covered with a first retaining ring 5, the first bearing cover 2 and the first retaining ring 5 not only realize the axial fixation of the eccentric shaft 8 but also play the role of torque transmission and shock absorption. The first bearing end cover 2 is fixedly connected with the box body 3 by fastening screws; a second bearing end cover 11 is arranged between the sixth eccentric cylinder 18 and the outer wall of the box body 3, and the second bearing end cover 11 not only realizes The axial positioning of the eccentric shaft 8 also plays the role of dustproof and sealing; the first, second, third, fourth, fifth and sixth eccentric cylinders are integrally connected; the third, fifth The two sides of the eccentric cylinder are respectively equipped with rolling bearings 7, and the outer side of the rolling bearings 7 is set with an eccentric turntable 6. The rolling bearing 7 and the eccentric turntable 6 are interference fit, and the eccentric turntable 6 can be mounted on the eccentric shaft through the rolling bearings 7. The first eccentric cylinder 13 is equipped with a pulley 1, and the pulley 1 is driven to rotate by a driving motor through a conveyor belt, and the rotation directions of the two pulleys are opposite.

The eccentric shaft 8 drives the eccentric turntable 6 to rotate during the rotation process, and the movement of the eccentric turntable 6 can be regarded as a planar motion of relative rotation around the eccentric shaft 8. The double eccentric system composed of the eccentric shaft 8 and the eccentric turntable 6 has a large Due to strong geometric nonlinearity, the trajectory of the eccentric turntable 6 is more complicated than that of the eccentric shaft 8, that is, mixed vibration. Among them, the eccentric shaft 8 produces the main frequency of vibration, and the eccentric turntable 6 produces the additional frequency fluctuating near the main frequency. This kind of exciter capable of producing wider vibration frequencies can always effectively improve the vibration of the block during the production process. The compactness of the block and the molding quality will be significantly improved.

Preferably, the sixth eccentric cylinder 18 is fitted with a transmission gear 9, and the transmission gear 9 can keep the eccentric shafts 8 in the above-mentioned two groups of vibration mechanisms rotating at the same speed.

Preferably, the drive motor is a frequency-variable speed-regulating motor, so as to meet the requirements of frequent speed changes in the process of different block processing and forming.

Preferably, a second stop ring 10 is provided between the transmission gear 9 , the fifth eccentric cylinder 17 and the inner wall of the box body 3 , so as to avoid the axial movement of the transmission gear 9 .

Preferably, the rolling bearing 7 is a needle bearing, thereby increasing the contact area between the eccentric shaft 8 and the eccentric turntable 6 and the bearing, and improving the service life of the vibrator. In addition, the needle roller bearing can prevent the synchronous rotation between the eccentric turntable 6 and the eccentric shaft 8, and the azimuth angle between the eccentric direction of the eccentric turntable 6 and the eccentric shaft 8 changes all the time, so that a wider range of vibration frequency and The amplitude increases the molding density of the block.

The vibration generated in the present invention is transmitted to the vibrating platform through the box body 3 so that the block can be formed rapidly. After the block forming is completed, when the vibrating device needs to stop working, the frequency conversion speed regulating motor is powered off and stops rotating, so that the two eccentric shafts 8 stop rotating, and the two eccentric turntables 6 stop rotating accordingly, and the vibration platform returns to a stable state.

It should be further explained that the specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (7)

1. The utility model provides a building block shaping vibration exciter based on chaotic vibration, includes the box, its characterized in that: two groups of excitation mechanisms which have the same structure and are symmetrically arranged in parallel are arranged in the box body; the excitation mechanism comprises an eccentric shaft, the eccentric shaft comprises a first eccentric cylinder, a second eccentric cylinder, a third eccentric cylinder, a fifth eccentric cylinder and a sixth eccentric cylinder, and the first eccentric cylinder, the second eccentric cylinder, the third eccentric cylinder, the fifth eccentric cylinder and the sixth eccentric cylinder are integrally and fixedly connected; two rolling bearings are respectively arranged on two sides of the third eccentric cylinder and the fifth eccentric cylinder, an eccentric turntable is sleeved on the outer side of each rolling bearing, and the rolling bearings are in interference fit with the eccentric turntable; the first eccentric cylinder is provided with a belt wheel, the belt wheel is driven by a driving motor through a conveying belt to rotate, and the rotating directions of the two belt wheels are opposite.

2. The chaotic vibration-based block forming vibration exciter according to claim 1, wherein: and the sixth eccentric cylinder is sleeved with a transmission gear, and the transmission gear can enable eccentric shafts in the two groups of excitation mechanisms to rotate at the same speed.

3. The chaotic vibration-based block forming vibration exciter according to claim 2, wherein: two mounting holes with the same size are formed in the left side wall and the right side wall of the box body, the hole centers of the mounting holes located on the same side are located on the same horizontal line, a self-aligning bearing is installed in each mounting hole, and the eccentric shaft penetrates through the bearing hole of the self-aligning bearing to achieve positioning.

4. A block forming vibration exciter based on hybrid vibration according to claim 3, wherein: the length of the eccentric shaft is greater than that of the box body, and the first eccentric cylinder is positioned on the outer side of the box body; one part of the second eccentric cylinder is positioned outside the box body, one part of the second eccentric cylinder is positioned inside the box body, and the other part of the second eccentric cylinder is arranged in the bearing hole of the self-aligning bearing in a penetrating manner; the third eccentric cylinder and the fifth eccentric cylinder are positioned on the inner side of the box body; one part of the sixth eccentric cylinder is positioned at the inner side of the box body, and the other part of the sixth eccentric cylinder is positioned in the bearing hole of the self-aligning bearing; the part of the second eccentric cylinder, which is positioned outside the box body, is provided with a first bearing end cover, the part, which is positioned inside the box body, is sleeved with a first check ring, the first bearing end cover and the first check ring not only realize the axial fixation of the eccentric shaft, but also play the roles of torque transmission and shock absorption, and the first bearing end cover is fixedly connected with the box body through a fastening screw; and a second bearing end cover is arranged between the sixth eccentric cylinder and the outer wall of the box body, and the second bearing end cover not only realizes the axial positioning of the eccentric shaft, but also plays a role in dust prevention and sealing.

5. The chaotic vibration-based block forming vibration exciter according to claim 4, wherein: the driving motor is a variable-frequency speed-regulating motor, so that the requirement of frequent speed change in the process of processing and forming different building blocks is met.

6. The chaotic vibration-based block forming vibration exciter according to claim 5, wherein: and second check rings are arranged between the transmission gear and the third and fifth eccentric cylinders as well as between the transmission gear and the inner wall of the box body.

7. The block forming vibration exciter based on hybrid vibration according to claim 6, wherein: the rolling bearing is a needle bearing.

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