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Compact vibration drying/cooling fluidized bed and parameter determination method thereof

A cooling fluidized bed, vibration drying technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc. emission reduction and other issues

Active Publication Date: 2019-04-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The residence time of the material and the unevenness of the dried product lead to low drying strength
[0004] 2. The single-layer fluidized bed takes up a lot of space, and the use efficiency and energy utilization rate are low, which does not meet the national energy saving and emission reduction requirements
[0005] 3. In the traditional multi-layer vibrating fluidized bed, there are relatively few plastids, and the power requirements of the driving motor are relatively large, and the drying and fluidization effect is relatively poor, and it has a great impact on the vibration of the ground

Method used

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  • Compact vibration drying/cooling fluidized bed and parameter determination method thereof
  • Compact vibration drying/cooling fluidized bed and parameter determination method thereof
  • Compact vibration drying/cooling fluidized bed and parameter determination method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] A compact vibrating drying / cooling fluid bed. Its dynamic model see figure 1 , including: 1. Plastid 1; 2. Rubber pad; 3. Spring 1; 4. Plastid 5; 5. Plastid 3; 6. Spring 3; 7. Spring 5; 8. Vibrator 1; 9. Vibrator 2; 10. Spring 4; 11. Mass body 4; 12. Spring 2; 13. Mass body 2; 14. Guide plate.

[0142] The model consists of five plastids, two vibrators and five sets of springs. Rubber pads are installed between plastid 5 and the base. Plastids 1, 2, 3, and 4 are connected to plastid 5 by springs. , at the same time, the plastid 5 is connected to the foundation through the spring 5 . Such as figure 1 , the radius of gyration of the vibrator on mass body 5 is r. Vibrator 1 and vibrator 2 rotate in opposite directions.

[0143] Numerical analysis of two-mass four-machine driven vibration system

[0144] In order to clearly describe the motion characteristics of the vibrating system and verify the theoretical results, some numerical characteristic analyzes are given. ...

Embodiment 2

[0157] Embodiment 2: Simulation analysis of dual-mass four-machine drive vibration system

[0158] In order to further analyze and verify the numerical results, three sets of simulation results are given by the Runge-Kutta method. Vibration system parameters and motor parameters are given above. In order to obtain the motion state of the system in different regions, generally by changing the spring stiffness k iy (i=1,2,3,4,5) to adjust ω 2 and ω 0 value. At the same time, each group will give two simulation results for comparison.

[0159] (a) Simulation results of area I

[0160] take k 1y =k 2y =k 3y =k 4y =60000kN / m,k 5y =10kN / m,z 1 = 0.52. The system is in the first region, that is, with respect to ω 0 sub-resonance state.

[0161] Figure 6 Indicates that the motor in a stable state reaches a stable state in a relatively short period of time, and the synchronous speed is stable at around 983r / min. At 60s, when the motor 2 is disturbed, the motor speed has ...

Embodiment 3

[0176] Example 3: Example data parameters for a compact vibratory drying / cooling fluidized bed. The invention is not limited to this design parameter.

[0177] The springs connected to mass bodies 1, 2, 3, and 4 all have stiffness k 1y =k 2y =k 3y =k 4y =8000kN / m, connected to the mass body 5 spring stiffness k 5y =10kN / m,z 2 = 0.71. The masses of the plastids are m 5 =2000kg, m 1 =m 2 =m 3 =m 4 =1500kg, the mass of the eccentric rotor of the exciter m 01 =m 02 =10kg, M 5 =m 5 +m 01 +m 02 =2020kg, therefore, we can get the natural frequency of the system as ω 0 = 100rad / s, ω 4 = 199 rad / s. The models of the two motors are the same (three-phase squirrel-cage, 50Hz, 380V, 6 poles, 0.75kW, rated speed 980r / min), given the motor parameters: rotor resistance R r =3.40Ω, stator resistance R s =3.35Ω, mutual inductance L m =164mH, rotor inductance L r =170mH, stator inductance L s =170mH, damping f 1 = f 2 = f 3 = 0.05. At this time, the system is in the s...

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Abstract

The invention belongs to the field of vibration drying / cooling fluidization, and discloses a compact vibration drying / cooling fluidized bed and a parameter determination method thereof. A dynamic model of the fluidized bed comprises four inner masses in a main vibration system, and the four inner masses are respectively connected to masses of an external vibration isolation system through four groups of springs; T; the vibration isolation system is composed of an outer body and two vibration exciters fixedly connected to the outer body. Each group of vibration exciters consists of an eccentricrotor and a motor and rotate reversely; T; the outer mass is fixedly connected to the base through a spring and can only move in the y direction; T; the four masses are connected with the outer masses through springs and guide plates respectively and can only move in the direction of the springs. Vibration synchronization theory is mainly applied, T, the synchronism and stability conditions of equipment for drying / cooling and fluidizing an object are determined by utilizing vibration states of different resonance types of a vibration system; T; two analysis methods of numerical analysis and simulation analysis are adopted to obtain a reasonable working point of the model, and a theoretical basis is provided for a vibration synchronization problem of an actual vibration system in engineering.

Description

technical field [0001] The invention belongs to the technical field of vibrating drying / cooling fluidized devices, and relates to a compact vibrating drying / cooling fluidized bed and a parameter determination method thereof. Background technique [0002] In the field of vibration drying / cooling fluidization, many devices have been applied to engineering practice, and this patent proposes a new compact vibration drying / cooling flow model. It has a high degree of automation, high drying, cooling, and fluidization effects. Its structure is compact, and several layers of devices can be set according to needs, saving space and improving economic performance. This patent takes the five-mass dual-machine driving dynamics model as the research object, applies the average method and the principle of Hamilton's minimum action, respectively obtains the synchronization criterion for the final synchronization of the two exciters, and analyzes the coupling of the system to achieve synchro...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 张学良高志国崔世举李超王志辉李明马辉
Owner NORTHEASTERN UNIV
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