CN112934649A - Compact vibration exciter and eccentric rotor set thereof - Google Patents
Compact vibration exciter and eccentric rotor set thereof Download PDFInfo
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- CN112934649A CN112934649A CN202110314755.9A CN202110314755A CN112934649A CN 112934649 A CN112934649 A CN 112934649A CN 202110314755 A CN202110314755 A CN 202110314755A CN 112934649 A CN112934649 A CN 112934649A
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- 230000005284 excitation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
- B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention belongs to the technical field of vibration equipment, and relates to an eccentric rotor set of a vibration exciter, which comprises a first eccentric rotor and a second eccentric rotor; the installation center distance of the first eccentric rotor and the second eccentric rotor is smaller than the sum of the rotation radiuses of the first eccentric rotor and the second eccentric rotor, and the first eccentric rotor and the second eccentric rotor do not interfere with each other when rotating around respective rotation centers; a compact vibration exciter comprises at least one eccentric rotor set, wherein the rotating speed ratio of a first eccentric rotor to a second eccentric rotor is 1:2, and the rotating directions of the first eccentric rotor and the second eccentric rotor are opposite. Compared with the traditional vibration exciter, the vibration exciter has the advantages that the center distance of the eccentric rotor can be properly reduced under the same exciting force condition, the structure of the vibration exciter is compact, the vibration exciter is particularly suitable for occasions with limited space dimensions, the weight of the vibration exciter equipment is light, and the cost is relatively low.
Description
Technical Field
The invention belongs to the technical field of vibration equipment, and relates to a compact vibration exciter and an eccentric rotor set thereof.
Background
The exciter is a device attached to some machines and equipments for generating exciting force, and is an important part for utilizing mechanical vibration. The vibration exciter can make the excited object obtain a certain form and magnitude of vibration quantity, so as to make vibration and strength test for object or make calibration for vibration testing instrument and sensor. The vibration exciter can also be used as an exciting part to form a vibrating machine for realizing the work of conveying, screening, compacting and molding materials or objects, tamping soil gravels and the like. The vibration exciters are classified into inertial type electric, electromagnetic type, electrohydraulic type, pneumatic type, and hydraulic type according to the excitation type. The exciter can generate unidirectional or multidirectional, simple harmonic or non-simple harmonic exciting force.
The continuous charging electric arc furnace has the characteristics of scrap steel preheating, flat melting tank smelting, foam slag submerged arc operation and the like in process, has the advantages of low power consumption, high production efficiency and the like in the production process, and is widely popularized and applied in recent years. In the continuous feeding system, the vibration exciter is a power source of continuous feeding equipment.
And the formula of the excitation force is F-mr omega2cos (ω t + φ), where m is the mass of the cam rotor, r is the cam rotor eccentricity, ω is the rotational angular velocity of the cam rotor, φ is the initial phase angle of the cam rotor, mr is the mass-to-diameter product. From the calculation formula of the exciting force, the amplitude of the exciting force is in direct proportion to the mass-diameter product. However, in practical application, because the space of the equipment is limited and limited by the size of the space structure, the mass diameter product of the existing vibration exciter is small, the exciting force is difficult to be improved, and the development requirement of small space and large output cannot be met.
Disclosure of Invention
In view of this, the present invention provides a compact vibration exciter and an eccentric rotor set thereof, aiming to solve the problem that the existing vibration exciter cannot meet the requirements of small space occupation and large exciting force.
In order to achieve the purpose, the invention provides the following technical scheme:
an eccentric rotor set of a vibration exciter comprises a first eccentric rotor and a second eccentric rotor; the installation center distance of the first eccentric rotor and the second eccentric rotor is smaller than the sum of the rotation radiuses of the first eccentric rotor and the second eccentric rotor, and the first eccentric rotor and the second eccentric rotor do not interfere with each other when rotating around the respective rotation centers.
Further, the first eccentric rotor and the second eccentric rotor comprise rotating shafts and eccentric blocks arranged on the rotating shafts; the eccentric block comprises concave parts and convex parts, and the concave parts and the convex parts are alternately arranged along the axial direction of the rotating shaft; the convex part on the first eccentric rotor is arranged in the concave part on the second eccentric rotor, and the convex part on the second eccentric rotor is arranged in the concave part of the first eccentric rotor.
Further, the concave part and the convex part are rectangular, triangular, trapezoidal or circular arc-shaped.
This scheme is through setting up concave part and convex part in two eccentric rotors relatively for the installation centre-to-centre spacing of eccentric rotor is less than its radius of rotation sum, compares with traditional vibration exciter, and under the same circumstances in installation center, radius of rotation and weight all increase, and the quality increases, thereby the increase of mass footpath product, the exciting force increase.
A compact exciter comprising at least one set of eccentric rotors according to claim 1, said first and second eccentric rotors rotating at a 1:2 ratio and in opposite directions.
According to the scheme, through the rotation of the two eccentric rotors, non-simple harmonic periodic vibration can be obtained in the excitation direction, and when the rotation speed ratio is 1:2, the ratio of the maximum acceleration in the positive direction and the maximum acceleration in the negative direction of the excitation is the largest, so that the materials on the vibrating body can rapidly advance or retreat.
Furthermore, the number of the eccentric rotor sets is two, and the two eccentric rotor sets are respectively a first eccentric rotor set and a second eccentric rotor set; the first eccentric rotor set is arranged above the second eccentric rotor set; the mass-diameter product and the rotating speed of the two first eccentric rotors are equal, and the rotating directions are opposite; the two second eccentric rotors have equal mass-diameter products.
Further, the initial phase angles of the two first eccentric rotors are symmetrical relative to the direction of the exciting force of the vibration exciter; the initial phase angles of the two second eccentric rotors are symmetrical relative to the direction of the exciting force of the vibration exciter.
The invention has the beneficial effects that:
1) the eccentric rotor adopts concave-convex structure for under the unchangeable condition of installation centre-to-centre spacing, radius of rotation increase, the quality increase makes the long-pending increase of mass footpath, thereby the exciting force obtains promoting.
2) The mass-diameter products of the two first eccentric rotors in the vibration exciter are equal, the initial phase angle is symmetrical relative to the vibration exciting direction of the vibration exciter, the mass-diameter products of the two second eccentric rotors are equal, and the initial phase angle is symmetrical relative to the vibration exciting force direction of the vibration exciter, so that other forces except the vibration exciting direction are symmetrically counteracted, and the vibration exciter works stably.
3) Compared with the traditional vibration exciter, under the same exciting force condition, the center distance of the eccentric rotor can be properly reduced, the vibration exciter has a compact structure, is particularly suitable for occasions with limited space dimensions, and has light equipment weight and relatively low cost.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of an eccentric rotor set according to the present invention;
FIG. 2 is a schematic view of the eccentric rotor of FIG. 1;
FIG. 3 is a schematic view of an eccentric rotor arrangement of the vibration exciter of the present invention;
FIG. 4 is another schematic view of the eccentric rotor according to the present invention;
FIG. 5 is another schematic view showing the construction of an eccentric rotor according to the present invention;
FIG. 6 is a schematic diagram illustrating the calculation of the mass-diameter product of the eccentric rotor assembly according to the present invention;
FIG. 7 is a schematic structural diagram of an eccentric rotor set of a conventional vibration exciter;
fig. 8 is a schematic diagram of the calculation of the mass-diameter product of the eccentric rotor set of the conventional vibration exciter.
Reference numerals: 1-a first eccentric rotor; 2-a second eccentric rotor; 3-a third eccentric rotor; 4-a fourth eccentric rotor; 101-a first rotating shaft; 102-a first projection; 103-a first recess; 201-a second rotating shaft; 202-a second projection; 203-second recess.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1 to 3, a compact vibration exciter includes a first eccentric rotor 1, a second eccentric rotor 2, a third eccentric rotor 3, and a fourth eccentric rotor 4, wherein the first eccentric rotor 1 and the third eccentric rotor 3 have the same structure, and the second eccentric rotor 2 and the fourth eccentric rotor 4 have the same structure. The first eccentric rotor 1 and the second eccentric rotor 2, and the third eccentric rotor 3 and the fourth eccentric rotor 4 each constitute one eccentric rotor group.
In this embodiment, the first eccentric rotor 1 includes a first rotating shaft 101, an eccentric mass including a first concave portion 103, a first convex portion 102; the first concave portions 103 and the first convex portions 102 are alternately arranged on the first rotating shaft 101; the first concave portion 103 and the first convex portion 102 are rectangular. The second eccentric rotor 2 comprises a second rotating shaft 201, a second concave part 203 and a second convex part 202, wherein the first concave part 103 on the first eccentric rotor 1 is opposite to the second convex part 202 of the second eccentric rotor 2, the first convex part 102 on the first eccentric rotor 1 is opposite to the second concave part 203 of the second eccentric rotor 2, and the first eccentric rotor 1 and the second eccentric rotor 2 do not interfere with each other when rotating around the respective revolution centers; the first eccentric rotor 1 and the third eccentric rotor 3 have the same mass-diameter product and opposite rotation directions; the second eccentric rotor 2 and the fourth eccentric rotor 4 have the same mass-diameter product and opposite rotation directions; the initial phase angles of the first eccentric rotor 1 and the third eccentric rotor 3, and the initial phase angles of the second eccentric rotor 2 and the fourth eccentric rotor 4 are symmetrical relative to the direction of the exciting force of the vibration exciter; the vibration exciter drives a first eccentric rotor 1, a second eccentric rotor 2, a third eccentric rotor 3 and a fourth eccentric rotor 4 to rotate in a gear transmission mode; wherein the first eccentric rotor 1 and the third eccentric rotor 3 have the same rotating speed; the rotation speed ratios of the first eccentric rotor 1 to the second eccentric rotor 2 and the third eccentric rotor 3 to the fourth eccentric rotor 4 are all 1: 2.
Referring to fig. 6, in the present embodiment, the rotation radius r1 of the first eccentric rotor 1 is 425mm, the rotation radius r2 of the second eccentric rotor 2 is 425mm, and the mounting center distance U is 540 mm. The length of the first convex part 102 is 460mm, the length of the first concave part is 920mm, the length of the second convex part 202 is 915mm, the length of the second concave part 203 is 470mm, the total length of the eccentric block is 2300mm, and the eccentric block is made of Q235. The mass of the first eccentric rotor 1 is 1304.9kg and the eccentricity is 125.9 mm; the second eccentric rotor 2 had a mass of 3510.5kg and an eccentricity of 185.8 mm. The first eccentric rotor 1 has a mass-diameter product of 164.3kg · m, and the second eccentric rotor 2 has a mass-diameter product of 652.3kg · m.
Example 2
Referring to fig. 4, the present embodiment is different from embodiment 1 in that the first concave portion 103, the first convex portion 102, the second concave portion 203, and the second convex portion 202 are trapezoidal in shape.
Example 3
Referring to fig. 5, the present embodiment is different from embodiment 1 in that the first concave portion 103, the first convex portion 102, the second concave portion 203, and the second convex portion 202 are triangular.
Comparative examples
Referring to fig. 7 to 8, an eccentric rotor set in a conventional vibration exciter is shown, where a mounting center distance U is 540mm, and rotation radii of two eccentric rotors are r3 and r4, respectively; wherein r3 equals 211mm, r4 equals 314mm, the length of eccentric block is 2300mm, and the eccentric block material is Q235. The mass of the two eccentric rotors is 1174.0kg and 2339.5kg respectively, the eccentricity is 64.7mm and 31.5mm respectively, and the mass-diameter products are 76.0 kg.m and 307.6 kg.m respectively.
Compared with the comparative example, the vibration exciter adopting the eccentric rotor structure in the invention has the advantages that under the condition that the installation center distances are the same, the mass diameter products of the two eccentric rotors are respectively improved by 116.2% and 112.1%, so that the exciting force is greatly improved, and on the contrary, under the condition that the exciting force is the same, the mass and the installation center distances of the vibration exciter are smaller than those of the traditional vibration exciter, and the structure is more compact.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. An eccentric rotor group of vibration exciter, its characterized in that: comprises a first eccentric rotor and a second eccentric rotor; the installation center distance of the first eccentric rotor and the second eccentric rotor is smaller than the sum of the rotation radiuses of the first eccentric rotor and the second eccentric rotor, and the first eccentric rotor and the second eccentric rotor do not interfere with each other when rotating around the respective rotation centers.
2. An exciter eccentric rotor set according to claim 1, wherein: the first eccentric rotor and the second eccentric rotor respectively comprise a rotating shaft and an eccentric block arranged on the rotating shaft; the eccentric block comprises concave parts and convex parts, and the concave parts and the convex parts are alternately arranged along the axial direction of the rotating shaft; the convex part on the first eccentric rotor is arranged in the concave part on the second eccentric rotor, and the convex part on the second eccentric rotor is arranged in the concave part of the first eccentric rotor.
3. An exciter eccentric rotor set according to claim 2, wherein: the concave part and the convex part are rectangular, triangular, trapezoidal or circular arc.
4. A compact vibration exciter, characterized in that: comprising at least one set of eccentric rotors according to claim 1, said first and second eccentric rotors rotating in a ratio of 1:2 and in opposite directions.
5. A compact exciter according to claim 4 wherein: the number of the eccentric rotor groups is two, and the two eccentric rotor groups are respectively a first eccentric rotor group and a second eccentric rotor group; the first eccentric rotor set is arranged above the second eccentric rotor set; the mass-diameter product and the rotating speed of the two first eccentric rotors are equal, and the rotating directions are opposite; the two second eccentric rotors have equal mass-diameter products.
6. A compact exciter according to claim 5 wherein: the initial phase angles of the two first eccentric rotors are symmetrical relative to the direction of the exciting force of the vibration exciter; the initial phase angles of the two second eccentric rotors are symmetrical relative to the direction of the exciting force of the vibration exciter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314755.9A CN112934649A (en) | 2021-03-24 | 2021-03-24 | Compact vibration exciter and eccentric rotor set thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314755.9A CN112934649A (en) | 2021-03-24 | 2021-03-24 | Compact vibration exciter and eccentric rotor set thereof |
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| CN112934649A true CN112934649A (en) | 2021-06-11 |
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| CN202110314755.9A Pending CN112934649A (en) | 2021-03-24 | 2021-03-24 | Compact vibration exciter and eccentric rotor set thereof |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055130A (en) * | 1990-03-26 | 1991-10-09 | 苏州试验仪器厂 | Centrifugal mechanical vibration exciter with crossed slide blocks |
| CN2111143U (en) * | 1991-07-10 | 1992-07-29 | 龙天民 | Novel vibration exciter of elliptic-track efficient vibrating screen |
| US6224293B1 (en) * | 1999-04-19 | 2001-05-01 | Compaction America, Inc. | Variable amplitude vibration generator for compaction machine |
| US20010013730A1 (en) * | 1998-03-31 | 2001-08-16 | Tadao Yamaguchi | Eccentric rotor and compact vibrator motor including the eccentric rotor |
| JP2003047912A (en) * | 2001-08-08 | 2003-02-18 | Tokyo Parts Ind Co Ltd | Disk type eccentric rotor and flat type vibration motor having the same |
| CN1501845A (en) * | 2000-08-09 | 2004-06-02 | ·��άϣ��ʯ�����豸����˾ | Exciter apparatus |
| CN201720178U (en) * | 2010-05-28 | 2011-01-26 | 昆明中铁大型养路机械集团有限公司 | Horizontal vibration exciter |
| CN202414672U (en) * | 2012-01-11 | 2012-09-05 | 中冶赛迪工程技术股份有限公司 | Multi-shaft vibration exciter device |
| CN202498009U (en) * | 2012-03-20 | 2012-10-24 | 天津玛铌肯科技有限公司 | Vibration exciter |
| US20150041242A1 (en) * | 2013-08-12 | 2015-02-12 | Mark A. Meier | Low Frequency Seismic Acquisition Using A Counter Rotating Eccentric Mass Vibrator |
| WO2015126073A1 (en) * | 2014-02-24 | 2015-08-27 | 곽병만 | Vibration generator using phase difference for amplitude control and method thereof |
| CN109939917A (en) * | 2019-04-22 | 2019-06-28 | 燕山大学 | A kind of biaxial inertial vibrator |
| CN210527629U (en) * | 2019-07-17 | 2020-05-15 | 福建南方路面机械有限公司 | Vibration exciter of chassis feeder |
| CN111247065A (en) * | 2018-03-20 | 2020-06-05 | 洛德公司 | Wide-bandwidth wide-circular force generator apparatus, system and method |
| CN215030806U (en) * | 2021-03-24 | 2021-12-07 | 中冶赛迪工程技术股份有限公司 | Compact vibration exciter and eccentric rotor set thereof |
-
2021
- 2021-03-24 CN CN202110314755.9A patent/CN112934649A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055130A (en) * | 1990-03-26 | 1991-10-09 | 苏州试验仪器厂 | Centrifugal mechanical vibration exciter with crossed slide blocks |
| CN2111143U (en) * | 1991-07-10 | 1992-07-29 | 龙天民 | Novel vibration exciter of elliptic-track efficient vibrating screen |
| US20010013730A1 (en) * | 1998-03-31 | 2001-08-16 | Tadao Yamaguchi | Eccentric rotor and compact vibrator motor including the eccentric rotor |
| US6224293B1 (en) * | 1999-04-19 | 2001-05-01 | Compaction America, Inc. | Variable amplitude vibration generator for compaction machine |
| CN1501845A (en) * | 2000-08-09 | 2004-06-02 | ·��άϣ��ʯ�����豸����˾ | Exciter apparatus |
| JP2003047912A (en) * | 2001-08-08 | 2003-02-18 | Tokyo Parts Ind Co Ltd | Disk type eccentric rotor and flat type vibration motor having the same |
| CN201720178U (en) * | 2010-05-28 | 2011-01-26 | 昆明中铁大型养路机械集团有限公司 | Horizontal vibration exciter |
| CN202414672U (en) * | 2012-01-11 | 2012-09-05 | 中冶赛迪工程技术股份有限公司 | Multi-shaft vibration exciter device |
| CN202498009U (en) * | 2012-03-20 | 2012-10-24 | 天津玛铌肯科技有限公司 | Vibration exciter |
| US20150041242A1 (en) * | 2013-08-12 | 2015-02-12 | Mark A. Meier | Low Frequency Seismic Acquisition Using A Counter Rotating Eccentric Mass Vibrator |
| WO2015126073A1 (en) * | 2014-02-24 | 2015-08-27 | 곽병만 | Vibration generator using phase difference for amplitude control and method thereof |
| CN111247065A (en) * | 2018-03-20 | 2020-06-05 | 洛德公司 | Wide-bandwidth wide-circular force generator apparatus, system and method |
| CN109939917A (en) * | 2019-04-22 | 2019-06-28 | 燕山大学 | A kind of biaxial inertial vibrator |
| CN210527629U (en) * | 2019-07-17 | 2020-05-15 | 福建南方路面机械有限公司 | Vibration exciter of chassis feeder |
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