CN114505221A - Torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen - Google Patents

Torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen Download PDF

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Publication number
CN114505221A
CN114505221A CN202210413184.9A CN202210413184A CN114505221A CN 114505221 A CN114505221 A CN 114505221A CN 202210413184 A CN202210413184 A CN 202210413184A CN 114505221 A CN114505221 A CN 114505221A
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China
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motor
excitation
vibration
excitation motor
torsion spring
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CN202210413184.9A
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CN114505221B (en
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侯度宇
侯勇俊
梁政
方潘
杜明俊
王钰文
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Southwest Petroleum University
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Southwest Petroleum University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

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Abstract

The invention discloses a torsion spring coupled double-shaft five-excitation-motor elliptical vibrating screen, and belongs to the technical field of vibrating screens. A torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen comprises: the device comprises a screen box, a first motor base, a second motor base, a third vibration excitation motor group and a double vibration excitation motor group; the three excitation motor groups include: the vibration motor comprises a first vibration motor, a second vibration motor and a third vibration motor, wherein a first torsion spring is arranged between the second vibration motor and the first vibration motor, and a second torsion spring is arranged between the second vibration motor and the third vibration motor; the dual excitation motor set includes: and a third torsion spring is arranged between the fourth excitation motor and the fifth excitation motor. According to the invention, the motor set is reasonably arranged, the impact generated by asynchronous rotation between the coaxial excitation motors is absorbed through the torsion spring, and the energy is released in the operation process, so that the excitation motors gradually realize synchronous rotation, and a larger excitation force can be provided under the condition of reducing energy consumption.

Description

Torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen
Technical Field
The invention relates to the technical field of vibrating screens, in particular to a torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen.
Background
The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.
Elliptical vibrating screens are usually implemented by driving with a double-excitation motor and a triple-excitation motor. When the double-excitation motor is adopted for driving, the total excitation force is limited, and the requirements of working parameters such as amplitude and the like required by efficient screening of a large-scale vibrating screen are difficult to realize; the excitation motor with a single large excitation force has the advantages of large dead weight, concentrated action position of the excitation force on the motor base, low strength of the motor base, serious phenomenon of 'large horse pulls a trolley' when the motor runs stably, and high energy consumption. When the large exciting force is realized by self-synchronizing excitation of a plurality of exciting motors, two exciting motors rotating in the same direction can generate an anti-phase synchronous state, so that the effective exciting force applied to the vibrating screen is not increased but reduced, and the aim of improving the exciting force by the plurality of exciting motors cannot be fulfilled. The existing elastic coupling technology is adopted between two excitation motors rotating in the same direction, so that the phenomenon of phase reversal synchronization between the two excitation motors rotating in the same direction is overcome, but the problems of large limitation in the effective excitation force of multiple excitation motors and the energy consumption of a vibrating screen are also solved.
Disclosure of Invention
The invention aims to provide a torsion spring coupled double-shaft five-excitation-motor elliptical vibrating screen, which solves the problem that the effective exciting force and the energy consumption of the vibrating screen of the existing multi-excitation-motor are relatively limited.
The technical scheme for solving the technical problems is as follows:
a torsion spring coupled double-shaft five-excitation motor elliptical vibrating screen comprises: the device comprises a screen box, a first motor base, a second motor base, a three-vibration-excitation motor set and a two-vibration-excitation motor set, wherein the first motor base and the second motor base are respectively connected to the top end of the screen box;
the three excitation motor groups include: the vibration motor comprises a first vibration motor, a second vibration motor and a third vibration motor which are arranged at intervals along the same axis, wherein a first torsion spring is arranged between the second vibration motor and the first vibration motor, and a second torsion spring is arranged between the second vibration motor and the third vibration motor;
the dual excitation motor set includes: and a fourth excitation motor and a fifth excitation motor are arranged at intervals along the same axis, and a third torsion spring is arranged between the fourth excitation motor and the fifth excitation motor.
According to the invention, through reasonably arranging the motor set, the impact generated by asynchronous rotation between the coaxial excitation motors is absorbed through the torsion spring, and the energy is released in the operation process, so that the excitation motors gradually realize synchronous rotation, and a larger excitation force can be provided under the condition of reducing the energy consumption.
Furthermore, two ends of each excitation motor are respectively provided with an eccentric block, two ends of each torsion spring are connected with the eccentric blocks at the end parts of the adjacent excitation motors, and the rotation center of each torsion spring is superposed with the rotation center of the connected eccentric block.
Further, the axes of the three excitation motor sets and the double excitation motor sets are parallel and are symmetrically arranged along the center of the width direction of the screen box.
According to the invention, through the coaxiality of the excitation motor, the coaxiality of the torsional spring and the collineation of the rotation center of the eccentric block, the nonuniform excitation force applied to the screen box is avoided, and thus the regularity of the vibration of the screen box is ensured.
Further, the first, second, third, fourth and fifth excitation motors are the same such that the ratio of the excitation forces of the three excitation motor sets to the double excitation motor sets is 3: 2.
Further, the eccentric block of the first excitation motor and the eccentric block of the third excitation motor; the eccentric mass moments of the eccentric mass of the fourth excitation motor and the eccentric mass of the fifth excitation motor are the same.
The eccentric mass moment of the eccentric block is the same as that of the exciting motor, so that the motion track of the mass center of the total mass participating in vibration is an ellipse with the ratio of the long axis to the short axis of 5:1, and the eccentric mass moment can be matched with a torsional spring to facilitate the vibration of the vibrating screen and simultaneously eliminate the swing of the vibrating screen.
Furthermore, the first excitation motor, the second excitation motor and the third excitation motor are excitation motors of the same type, and the fourth excitation motor and the fifth excitation motor are excitation motors of the other type, so that the vibrating screen can realize elliptical motion tracks of other major-minor axis proportions.
Further, the first excitation motor and the third excitation motor are of the same type, and the middle second excitation motor is of another type.
Further, the eccentric mass moments of the eccentric mass of the fourth excitation motor and the eccentric mass of the fifth excitation motor are the same.
Further, the eccentric block of the first excitation motor and the eccentric block of the third excitation motor.
Furthermore, vibration isolation springs are arranged on the periphery of the bottom of the screen box respectively, and the bottom ends of the vibration isolation springs are connected with a base.
According to the invention, the vibration isolation spring is arranged at the bottom of the screen box and is used for buffering and supporting the bottom of the screen box, so that the influence of the connection of the base and the screen box on the vibration screening effect is avoided.
The invention has the following beneficial effects:
(1) compared with the existing three-excitation motor or four-excitation motor vibrating screen, the vibrating screen can provide larger exciting force to meet the requirement of a heavy vibrating screen with large screening area; (2) compared with a self-synchronizing vibrating screen with multiple excitation motors, the vibrating screen avoids the phenomenon that excitation force is offset due to the fact that the excitation motors rotating in the same direction are in an anti-phase synchronous state; (3) the bending moment borne by the motor base is reduced, and the strength is high; (4) the energy consumption is low, and when the same excitation force is generated, the energy consumption is only 40 percent of the original energy consumption; (5) simple structure and low cost.
Drawings
FIG. 1 is a schematic structural diagram of a torsional spring coupled double-shaft five-excitation motor elliptical vibrating screen of the invention;
FIG. 2 is a schematic top view of a torsional spring coupled biaxial five-excitation motor elliptical vibrating screen of the present invention;
FIG. 3 is a schematic side view of a torsional spring coupled two-axis five-excitation motor elliptical vibrating screen according to the present invention;
FIG. 4 is a schematic structural diagram of a triple excitation motor assembly according to the present invention;
fig. 5 is a schematic structural diagram of a dual excitation motor assembly according to the present invention.
In the figure: 1-three excitation motor groups; 11-a first excitation motor; 111-a first eccentric mass; 112-a second eccentric mass; 12-a first torsion spring; 13-a second excitation motor; 131-a third eccentric mass; 132-a fourth eccentric mass; 14-a second torsion spring; 15-a third excitation motor; 151-fifth eccentric mass; 152-a sixth eccentric mass; 16-a first motor mount; 2-a double excitation motor group; 21-a fourth excitation motor; 211-seventh eccentric mass; 212-eighth eccentric mass; 22-a third torsion spring; 23-a fifth excitation motor; 231-ninth eccentric mass; 232-tenth eccentric mass; 24-a second motor mount; 3-a sieve box; 4-a vibration isolation spring; 5-base.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 3, a torsion spring coupled biaxial five-excitation motor elliptical vibrating screen includes: the screen box 3, connect first motor cabinet 16 and second motor cabinet 24 on screen box 3 top respectively, be located the three excitation motors of 16 tops and be located the two excitation motors of 24 tops of first motor cabinet 1 and be located the two excitation motors of second motor cabinet 2.
Be connected with vibration isolation spring 4 all around in the bottom of sieve case 3 respectively, vibration isolation spring 4's bottom is connected with base 5, sets up vibration isolation spring 4 and base 5 in the bottom of sieve case 3 for cushion the support to the bottom of sieve case 3, avoid the connection of base 5 and sieve case 3 to cause the influence to the vibratory screening effect.
Referring to fig. 2, 4 and 5, the triple excitation motor group 1 includes: the vibration motor comprises a first vibration motor 11, a second vibration motor 13 and a third vibration motor 15 which are arranged along the same axis at intervals, wherein a first torsion spring 12 is arranged between the first vibration motor 11 and the second vibration motor 13, and a second torsion spring 14 is arranged between the first vibration motor 11 and the third vibration motor 15. The bottom ends of the first, second, and third excitation motors 11, 13, and 15 are connected to the top surface of the first motor mount 16. The dual excitation motor group 2 includes: a fourth excitation motor 21 and a fifth excitation motor 23 which are arranged at intervals along the same axis, and a third torsion spring 22 is arranged between the fourth excitation motor 21 and the fifth excitation motor 23. The bottom ends of the fourth excitation motor 21 and the fifth excitation motor 23 are connected to the top surface of the second motor mount 24. The first motor base 16 and the second motor base 24 are arranged in parallel, the axes of the three excitation motor sets 1 and the axes of the two excitation motor sets 2 above are parallel, the three excitation motor sets 1 and the two excitation motor sets 2 are also symmetrically arranged along the center of the width direction of the screen box 3, and the width direction of the screen box 3 is the axial extension direction of each motor.
The both ends at each excitation motor are equipped with eccentric block respectively, include: the first and second eccentric masses 111 and 112 located at both ends of the first excitation motor 11, the third and fourth eccentric masses 131 and 132 located at both ends of the second excitation motor 13, the fifth and sixth eccentric masses 151 and 152 located at both ends of the third excitation motor 15, the seventh and eighth eccentric masses 211 and 212 located at both ends of the fourth excitation motor 21, and the ninth and tenth eccentric masses 231 and 232 located at both ends of the fifth excitation motor 23. Wherein the second eccentric mass 112 and the third eccentric mass 131 are respectively connected with both ends of the first torsion spring 12, the fourth eccentric mass 132 and the fifth eccentric mass 151 are respectively connected with both ends of the second torsion spring 14, and the first torsion spring 12 and the second torsion spring 14 coincide with the rotation center of the connected eccentric masses. The eighth eccentric mass 212 and the ninth eccentric mass 231 are respectively connected to both ends of the third torsion spring 22, and the third torsion spring 22 coincides with the rotation center of the connected eccentric masses.
All motors in the three-excitation motor set 1 are started simultaneously in the same direction, all motors in the double-excitation motor set 2 are started simultaneously in the same direction, and the rotating direction of the motors in the three-excitation motor set 1 is opposite to that of the motors in the double-excitation motor set 2. Due to the electromagnetic characteristic error between every two adjacent exciting motors, when the motor is started, the impact generated by the asynchronous rotation of the rotating cylinders between the adjacent exciting motors is absorbed by the torsion springs between the exciting motors respectively; along with the operation of the motor, each torsional spring casting releases the absorbed energy, so that the excitation motor gradually realizes zero-phase synchronous rotation under the coupling action of the torsional springs.
Each torsion spring needs to adopt proper torsional rigidity, the torsional rigidity is too high, and the impact generated between the shock excitation motors during starting cannot be absorbed in a buffering way; the torsional rigidity is too small, zero phase synchronization cannot be realized among the excitation motors, and the total excitation force generated by the three excitation motor groups 1 and the double excitation motor groups 2 cannot be maximized.
The types of the exciting motors can be the same, and the eccentric blocks can also be the same, so that the ratio of exciting forces of the three exciting motor sets 1 to the exciting force of the two exciting motor sets 2 is 3:2, and the motion track of the mass center of the total mass of the vibrating screen participating in vibration is an ellipse with the ratio of the long axis to the short axis being 5: 1. When the vibrating screen is designed, the first motor base 16, the second motor base 24 and the installation positions of the shock excitation motors above the first motor base and the second motor base are reasonably arranged, so that the swinging of the screen box 3 can be eliminated, and the translational vibration of the screen box 3 is realized. According to the requirement of ovality of the running track of the vibrating screen in actual engineering, the first excitation motor 11, the second excitation motor 13 and the third excitation motor 15 can adopt the same type and the same eccentric block, and the fourth excitation motor 21 and the fifth excitation motor 23 can adopt the other type and the eccentric block.
The first excitation motor 11 and the third excitation motor 15, which are the excitation motors at both ends of the three excitation motor group 1, are preferably of the same type, the second excitation motor 13 in the middle can be of another type, the eccentric mass moments of the first eccentric mass 111 and the second eccentric mass 112, and the fifth eccentric mass 151 and the sixth eccentric mass 152 are preferably the same, and the eccentric mass moments of the third eccentric mass 131 and the fourth eccentric mass 132 can be of other types, but the eccentric mass moments of the third eccentric mass 131 and the fourth eccentric mass 132 are preferably the same. The fourth excitation motor 21 and the fifth excitation motor 23 in the dual excitation motor group 2 are preferably of the same type, and the corresponding eccentric masses thereof are preferably of the same eccentric mass moment.
When the vibrating screen runs stably, the first exciting motor 11 and the third exciting motor 15 at two ends of the three exciting motor groups 1 can be powered off, the fourth exciting motor 21 or the fifth exciting motor 23 in the double exciting motor group 2 can be powered off, namely only one exciting motor in each exciting motor group is powered on, and when all exciting motors are of the same type, the vibrating screen is preferably only 40% of that when all exciting motors are powered on simultaneously.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides a five excitation motor elliptical vibrating screens of biax of torsional spring coupling which characterized in that includes: the device comprises a screen box (3), a first motor base (16) and a second motor base (24) which are respectively connected to the top end of the screen box (3), a three-vibration-excitation motor set (1) positioned above the first motor base (16) and a double-vibration-excitation motor set (2) positioned above the second motor base (24);
the three excitation motor group (1) comprises: the vibration motor comprises a first vibration motor (11), a second vibration motor (13) and a third vibration motor (15) which are arranged along the same axis at intervals, wherein a first torsion spring (12) is arranged between the second vibration motor (13) and the first vibration motor (11), and a second torsion spring (14) is arranged between the second vibration motor (13) and the third vibration motor (15);
the dual excitation motor group (2) comprises: the motor comprises a fourth excitation motor (21) and a fifth excitation motor (23) which are arranged along the same axis at intervals, wherein a third torsion spring (22) is arranged between the fourth excitation motor (21) and the fifth excitation motor (23).
2. The torsion spring-coupled biaxial five-excitation-motor elliptical vibrating screen as claimed in claim 1, characterized in that two ends of each excitation motor are respectively provided with an eccentric block, two ends of each torsion spring are connected with the eccentric blocks at the end parts of the adjacent excitation motors, and the rotation center of each torsion spring is coincident with the rotation center of the eccentric block.
3. The torsion spring-coupled biaxial five-excitation motor elliptical vibrating screen as claimed in claim 2, characterized in that the axes of the three-excitation motor set (1) and the two-excitation motor set (2) are parallel and are arranged symmetrically along the center of the width direction of the screen box (3).
4. The torsional spring-coupled biaxial five-excitation-motor elliptical vibrating screen as claimed in claim 3, characterized in that the first excitation motor (11), the second excitation motor (13), the third excitation motor (15), the fourth excitation motor (21) and the fifth excitation motor (23) are identical, so that the ratio of excitation forces of the three excitation motor sets (1) to the double excitation motor set (2) is 3:2, and an elliptical motion trajectory with a major-minor axis ratio of 5:1 is realized.
5. The torsion spring-coupled biaxial five-excitation-motor elliptical vibrating screen as claimed in claim 3, characterized in that the first excitation motor (11), the second excitation motor (13) and the third excitation motor (15) are excitation motors of the same type, and the fourth excitation motor (21) and the fifth excitation motor (23) are excitation motors of another type, so that the vibrating screen can realize elliptical motion tracks of other major-minor axis ratios.
6. The torsion spring-coupled biaxial five-excitation-motor elliptical vibrating screen as claimed in claim 3, characterized in that the first excitation motor (11) and the third excitation motor (15) are of the same type, and the middle second excitation motor (13) is of another type.
7. The torsion spring-coupled biaxial five-excitation motor elliptical vibrating screen of claim 3, characterized in that the eccentric mass moments of the eccentric mass of the first excitation motor (11) and the eccentric mass of the third excitation motor (15) are the same.
8. The torsion spring-coupled biaxial five-excitation motor elliptical vibrating screen of claim 6, characterized in that the eccentric mass moments of the eccentric mass of the fourth excitation motor (21) and the eccentric mass of the fifth excitation motor (23) are the same.
9. The torsion spring coupled double-shaft five-excitation motor elliptical vibrating screen according to any one of claims 1 to 8, characterized in that vibration isolation springs (4) are respectively arranged around the bottom of the screen box (3), and the bottom ends of the vibration isolation springs (4) are connected with a base (5).
CN202210413184.9A 2022-04-20 2022-04-20 Torsional spring coupled double-shaft five-excitation-motor elliptical vibrating screen Active CN114505221B (en)

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