CN220239223U - Self-variable force double-mass vibrating screen - Google Patents
Self-variable force double-mass vibrating screen Download PDFInfo
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- CN220239223U CN220239223U CN202321702207.4U CN202321702207U CN220239223U CN 220239223 U CN220239223 U CN 220239223U CN 202321702207 U CN202321702207 U CN 202321702207U CN 220239223 U CN220239223 U CN 220239223U
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 210000002706 plastid Anatomy 0.000 claims 1
- 230000005284 excitation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a self-force-variable double-mass vibrating screen, which relates to the technical field of double-mass vibrating screens and comprises a vibration exciter frame and a screen box, wherein a main vibration spring and a guide plate are arranged between the vibration exciter frame and the screen box; the vibration screen load operation natural frequency detection device comprises a vibration motor operation frequency detection module, a vibration screen load operation natural frequency detection module and a vibration screen load operation natural frequency detection module, wherein the vibration motor operation frequency detection module is used for detecting the vibration frequency of the variable-force vibration motor; the variable-frequency module is used for adjusting the power supply frequency of the variable-force vibration motor; the vibration screen vibration amplitude detection module is used for detecting vibration screen vibration amplitude. The self-variable force double-mass vibrating screen can adjust the parameter value of a vibrating system on line so as to keep the optimal running state.
Description
Technical Field
The utility model relates to the technical field of double-mass vibrating screens, in particular to a self-variable force double-mass vibrating screen.
Background
The purpose of the vibrating screen is to screen and classify materials. The material is thrown forward under the action of vibration force, the material flow continuously moves forward, the material flow is layered according to granularity in the movement, large particles are arranged on the upper layer, and small particles are arranged on the lower layer, so that the material particles smaller than the sieve holes continuously pass through the sieve holes and fall onto a lower layer discharge plate to be discharged from a discharge hole; the material particles larger than the sieve holes are left on the sieve screen and discharged from the other discharge hole; thereby classifying the material.
The excitation frequency of the traditional vibrating screen is set in comparison with the excitation frequency of the traditional vibrating screen in design, the situation of a production site is complex, the given frequency ratio is not necessarily in accordance with the situation of the site, such as a double-mass vibrating screen disclosed in patent application No. CN201120416481.6, a double-mass vibrating screen disclosed in patent application No. CN201210502378.2, a sub-resonance double-mass energy-saving vibrating screen disclosed in patent application No. CN201210246754.6, which is driven by a vibrating motor, is connected between a vibration exciter and a screen box by a main vibrating spring, and a base is provided with a vibration damping spring.
However, the parameter values of the vibration system, such as frequency ratio, exciting force, amplitude and throughput, are not regulated on line, so that the optimal screening state is difficult to achieve, and the screening efficiency is affected.
Therefore, it is necessary to provide a self-changing force double-mass vibrating screen to solve the above problems.
Disclosure of Invention
(one) solving the technical problems
The utility model aims to provide a self-variable force double-mass vibrating screen, which solves the problem that the frequency ratio, exciting force, amplitude and throughput of the conventional vibrating screen are inconvenient to adjust.
(II) technical scheme
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the self-force-changing double-mass vibrating screen comprises a vibration exciter frame and a screen box, wherein a main vibration spring and a guide plate are arranged between the vibration exciter frame and the screen box, a force-changing vibrating motor is fixedly connected to the middle part of the vibration exciter frame, and a vibration damping spring is arranged between the screen box and a base; the vibration screen load operation natural frequency detection device comprises a vibration motor operation frequency detection module, a vibration screen load operation natural frequency detection module and a vibration screen load operation natural frequency detection module, wherein the vibration motor operation frequency detection module is used for detecting the vibration frequency of the variable-force vibration motor;
the variable-frequency module is used for adjusting the power supply frequency of the variable-force vibration motor;
the vibration screen vibration amplitude detection module is used for detecting vibration screen vibration amplitude;
the frequency detection module, the frequency conversion module, the amplitude detection module and the variable force vibration motor are all connected with the main control module.
Preferably, two ends of the main vibrating spring are fixedly connected with the vibration exciter frame and the screen box respectively, and two ends of the guide plate are hinged with the vibration exciter frame and the screen box respectively.
Preferably, the installation angle of the main vibration spring is 50-55 degrees, and the guide plate and the main vibration spring are mutually perpendicular.
Preferably, the variable force vibration motor comprises a variable frequency motor and a force changer, and the force changer is driven and adjusted by a torque converter through a flexible shaft.
Preferably, the torque converter is driven to rotate by a servo motor, and the servo motor is connected with the main control module.
Preferably, the two variable-force vibration motors are symmetrically arranged and reversely and synchronously rotate.
Preferably, the inside fixedly connected with screen cloth of screen cloth case, the feed end fixedly connected with stock guide of screen cloth case, the stock guide is the reverse V-arrangement.
(III) beneficial effects
Compared with the prior art, the utility model provides a self-variable force double-mass vibrating screen, which has the following beneficial effects:
1. the self-force-changing double-mass vibrating screen can adjust the rotating speed of a force-changing vibrating motor through a frequency conversion module, can adjust the exciting frequency ratio on line, find the optimal frequency ratio on line, and can realize negative feedback automatic control.
2. The self-variable force double-mass vibrating screen is adjustable in frequency ratio, so that the vibrating screen can find the optimal frequency ratio according to the property of screened materials, and the vibrating screen can work at an optimal working point; meanwhile, the exciting force-amplitude can be adjusted on line, so that the vibrating screen treatment capacity can be adjusted manually, and the requirements of the site can be met.
Drawings
FIG. 1 is a schematic front view of the structure of the present utility model;
FIG. 2 is a system block diagram of the present utility model;
FIG. 3 is a functional block diagram of the excitation frequency and frequency ratio adjustment system of the present utility model;
FIG. 4 is a functional block diagram of an excitation force-amplitude-throughput control system of the present utility model;
fig. 5 is a torque converter control diagram for a variable force vibration motor of the present utility model.
In the figure: 1. a variable force vibration motor; 2. a vibration exciter frame; 3. a main vibrating spring; 4. a material guide plate; 5. a screen; 6. a damping spring; 7. a guide plate; 8. a screen box; 9. a variable frequency motor; 10. a force variable device; 11. a flexible shaft; 12. a torque converter.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-5, a self-variable force double-mass vibrating screen comprises a vibration exciter frame 2 and a screen box 8, wherein a main vibrating spring 3 and a guide plate 7 are arranged between the vibration exciter frame 2 and the screen box 8, a variable force vibrating motor 1 is fixedly connected to the middle part of the vibration exciter frame 2, and a vibration damping spring 6 is arranged between the screen box 8 and a base.
Specifically, the two ends of the main vibrating spring 3 are fixedly connected with the vibration exciter frame 2 and the screen box 8 respectively, the two ends of the guide plate 7 are hinged with the vibration exciter frame 2 and the screen box 8 respectively, the installation angle of the main vibrating spring 3 is 50-55 degrees, the guide plate 7 is mutually perpendicular to the main vibrating spring 3, two variable-force vibrating motors 1 are arranged, and the two variable-force vibrating motors 1 are symmetrically installed and reversely and synchronously rotate. The two variable-force vibrating motors are symmetrically arranged and synchronously rotate reversely, and the synthesized exciting force enables the screen box to vibrate linearly.
The variable force vibration motor 1 comprises a variable frequency motor 9 and a variable force device 10, the variable force device 10 is driven and regulated by a torque converter 12 through a flexible shaft 11, the torque converter 12 is driven and rotated by a servo motor, the servo motor is connected with a main control module, and the variable force device 10 is arranged at two ends of the variable frequency motor 9.
Specifically, the torque converter 12 includes two gears meshed with each other, and two ends of each gear are fixedly connected with a flexible shaft 11, wherein one gear is driven to rotate by a servo motor. Four force variators 10 in the two variable force vibration motors 1 can be synchronously driven through four flexible shafts 11 to synchronously adjust, so that the excitation force lines of the two variable force vibration motors 1 are kept symmetrical, and directional resultant force is formed, so that the vibrating screen can vibrate linearly.
In order to enable blanking to be dispersed rapidly, the screen surface width is fully distributed, a screen 5 is fixedly connected to the inside of the screen box 8, a material guide plate 4 is fixedly connected to the feeding end of the screen box 8, and the material guide plate 4 is in an inverted V shape.
The variable-force vibration motor comprises a variable-force vibration motor 1, and is characterized by further comprising a frequency detection module, wherein the frequency detection module comprises a vibration motor operation frequency detection module for detecting the vibration frequency of the variable-force vibration motor 1 and a load operation natural frequency detection module for detecting the load operation natural frequency of a vibrating screen, and the variable-frequency module is used for adjusting the power supply frequency of the variable-force vibration motor 1.
The vibration motor running frequency detection module and the load running natural frequency detection module detect the obtained data and input the data to the main control module, so that the main control module compares the current frequency ratio with the given frequency ratio, calculates the current frequency ratio to determine the difference value and the direction, and carries out power frequency conversion through the frequency conversion module according to the result to control the motor rotating speed so as to adjust the current frequency ratio to the given frequency ratio.
The vibration amplitude detection module is used for detecting vibration amplitude of the vibrating screen.
The vibration amplitude detection module detects the current vibration amplitude of the vibration screen and inputs the current vibration amplitude into the main control module, so that the main control module compares and calculates the current vibration amplitude with a given vibration amplitude to determine the magnitude and the direction of a difference value, and then the vibration exciting force of the variable force vibration motor 1 is regulated by controlling the action of the variable force device 10, so that the current vibration amplitude is regulated to the given vibration amplitude.
The force changer 10 described in the text is in the prior art, and the adjustment of the force changer 10 specifically drives the movable eccentric wheel to rotate relative to the fixed eccentric wheel through input torque, so as to change the eccentric distance, thereby achieving the purpose of adjusting the exciting force of the force-changing vibration motor 1.
Working principle: in the test operation stage, manually adjusting the excitation frequency ratio to be used as a given frequency ratio, inputting the given frequency ratio to a main control module through a control panel, detecting the vibration frequency of the variable force vibration motor 1 through a vibration motor operation frequency detection module, detecting the natural frequency of the vibration screen load operation through a load operation natural frequency detection module, calculating the current frequency ratio of the vibration frequency and the natural frequency by the main control module, comparing the current frequency ratio with the given frequency ratio, determining the difference value and the direction, controlling a frequency conversion module to change the power supply frequency of the variable force vibration motor 1, changing the rotating speed of the variable force vibration motor 9, thereby changing the vibration frequency of the variable force vibration motor 1, adjusting the current frequency ratio to the given frequency ratio, checking the motion state of the vibration screen, continuously inputting different given frequency ratios to the main control module until the operation requirement is met, fixing the given frequency ratio when the operation requirement is met, and at the moment, the vibration screen is in the optimal motion state; in operation, the frequency ratio is automatically kept unchanged until the next readjustment;
the vibration force-amplitude-conveying amount is changed due to the change of the rotating speed and the vibration frequency of the variable frequency motor 9, and the vibration force amplitude is changed by adjusting the variable force device 10, so that the amplitude and the processing amount are returned to original values, namely the given amplitude in the load running state;
specifically, the amplitude detection module detects the amplitude of the current vibrating screen, the main control module calculates the difference value and the direction of the current amplitude and the given amplitude, and controls the servo motor to drive the torque converter 12 to rotate according to the calculation result, and the torque converter 12 drives the plurality of force converters 10 to synchronously adjust through the flexible shaft 11, so that the adjustment of exciting force is completed until the current amplitude reaches the given amplitude.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a two plastids shale shakers of self-changing force which characterized in that: the vibrating screen comprises a vibration exciter frame (2) and a screen box (8), wherein a main vibrating spring (3) and a guide plate (7) are arranged between the vibration exciter frame (2) and the screen box (8), a force-variable vibrating motor (1) is fixedly connected to the middle part of the vibration exciter frame (2), a vibration damping spring (6) is arranged between the screen box (8) and a base, and a screen (5) is fixedly connected to the inside of the screen box (8); and also comprises
The frequency detection module comprises a vibration motor operation frequency detection module for detecting the vibration frequency of the variable force vibration motor (1) and a load operation natural frequency detection module for detecting the load operation natural frequency of the vibrating screen;
the variable-frequency module is used for adjusting the power supply frequency of the variable-force vibration motor (1);
the vibration screen vibration amplitude detection module is used for detecting vibration screen vibration amplitude;
the frequency detection module, the frequency conversion module, the amplitude detection module and the variable force vibration motor (1) are all connected with the main control module.
2. A self-changing force double mass vibrating screen as claimed in claim 1 wherein: the two ends of the main vibrating spring (3) are fixedly connected with the vibration exciter frame (2) and the screen box (8) respectively, and the two ends of the guide plate (7) are hinged with the vibration exciter frame (2) and the screen box (8) respectively.
3. A self-changing force double mass vibrating screen as claimed in claim 1 wherein: the installation angle of the main vibrating spring (3) is 50-55 degrees, and the guide plate (7) is perpendicular to the main vibrating spring (3).
4. A self-changing force double mass vibrating screen as claimed in claim 1 wherein: the variable-force vibration motor (1) comprises a variable-frequency motor (9) and a variable-force device (10), and the variable-force device (10) is driven and regulated by a torque converter (12) through a flexible shaft (11).
5. A self-changing force double mass vibrating screen as claimed in claim 4 wherein: the torque converter (12) is driven to rotate by a servo motor, and the servo motor is connected with the main control module.
6. A self-changing force double mass vibrating screen as claimed in claim 1 wherein: the two variable-force vibration motors (1) are symmetrically arranged, and reversely and synchronously rotate.
7. A self-changing force double mass vibrating screen as claimed in claim 1 wherein: the feeding end of the screen box (8) is fixedly connected with a material guide plate (4), and the material guide plate (4) is in an inverted V shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321702207.4U CN220239223U (en) | 2023-06-30 | 2023-06-30 | Self-variable force double-mass vibrating screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321702207.4U CN220239223U (en) | 2023-06-30 | 2023-06-30 | Self-variable force double-mass vibrating screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220239223U true CN220239223U (en) | 2023-12-26 |
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ID=89232020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321702207.4U Active CN220239223U (en) | 2023-06-30 | 2023-06-30 | Self-variable force double-mass vibrating screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220239223U (en) |
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2023
- 2023-06-30 CN CN202321702207.4U patent/CN220239223U/en active Active
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