Figure 1.
Structures of the SLK3661W mining vibrating screen (lateral view). The left side is the loading side and the right side is the unloading side.
Figure 1.
Structures of the SLK3661W mining vibrating screen (lateral view). The left side is the loading side and the right side is the unloading side.
Figure 2.
Meshed finite element model of the mining vibrating screen structures: (a) meshed exciting beam, (b) meshed bearing beam, (c) meshed reinforcing beam, (d) bolted connection, (e) meshed lateral plate, (f) loading side spring seat with simplified springs, and (g) unloading side spring seat with simplified springs.
Figure 2.
Meshed finite element model of the mining vibrating screen structures: (a) meshed exciting beam, (b) meshed bearing beam, (c) meshed reinforcing beam, (d) bolted connection, (e) meshed lateral plate, (f) loading side spring seat with simplified springs, and (g) unloading side spring seat with simplified springs.
Figure 3.
The overall finite element model of the mining vibrating screen. (a) POINT MASS units and alternating forces are applied on region A and region B. (b) Diagram of elastic supports.
Figure 3.
The overall finite element model of the mining vibrating screen. (a) POINT MASS units and alternating forces are applied on region A and region B. (b) Diagram of elastic supports.
Figure 4.
Vibration displacement contour map of the mining vibrating screen. (a) Overall vibration displacement contour map of the overall structure. (b) Lateral vibration displacement contour map.
Figure 4.
Vibration displacement contour map of the mining vibrating screen. (a) Overall vibration displacement contour map of the overall structure. (b) Lateral vibration displacement contour map.
Figure 5.
Vibration displacement contour map of the mining vibrating screen with spring failure. (a) Overall vibration displacement contour map of the overall structure. (b) Lateral vibration displacement contour map.
Figure 5.
Vibration displacement contour map of the mining vibrating screen with spring failure. (a) Overall vibration displacement contour map of the overall structure. (b) Lateral vibration displacement contour map.
Figure 6.
The amplitude variation coefficient (AVC) curves of each spring seat in the x, y, and z directions in the case of failure.
Figure 6.
The amplitude variation coefficient (AVC) curves of each spring seat in the x, y, and z directions in the case of failure.
Figure 7.
The amplitude variation coefficient (AVC) surfaces of four spring seats in the x, y, and z directions.
Figure 7.
The amplitude variation coefficient (AVC) surfaces of four spring seats in the x, y, and z directions.
Figure 8.
Experimental setup. (a) The SLK3661W vibrating screen applied in the coal washery. (b) Acceleration sensors and data acquisition instruments used in experiments.
Figure 8.
Experimental setup. (a) The SLK3661W vibrating screen applied in the coal washery. (b) Acceleration sensors and data acquisition instruments used in experiments.
Figure 9.
Acceleration and displacement curves in the x, y, and z directions of spring seat 2 under normal conditions, including the steady state displacement curves during 20–21 s.
Figure 9.
Acceleration and displacement curves in the x, y, and z directions of spring seat 2 under normal conditions, including the steady state displacement curves during 20–21 s.
Figure 10.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 1, including the simulation results and experimental results.
Figure 10.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 1, including the simulation results and experimental results.
Figure 11.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 2, including the simulation results and experimental results.
Figure 11.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 2, including the simulation results and experimental results.
Figure 12.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 3, including the simulation results and experimental results.
Figure 12.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 3, including the simulation results and experimental results.
Figure 13.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 4, including the simulation results and experimental results.
Figure 13.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 4, including the simulation results and experimental results.
Figure 14.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 5, including the simulation results and experimental results.
Figure 14.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 5, including the simulation results and experimental results.
Figure 15.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 6, including the simulation results and experimental results.
Figure 15.
The amplitude variation coefficients (AVCs) of each spring seat in the x, y, and z directions under spring failure kind 6, including the simulation results and experimental results.
Table 1.
Elastic support simulation parameters table.
Table 1.
Elastic support simulation parameters table.
Parameters | /(N/m) | /(N/m) | /(N/m) | /(N/m) |
value | 353,010 | 470,680 | 353,010 | 470,680 |
parameters | /(N/m) | /(N/m) | /(N/m) | /(N/m) |
value | 931,800 | 1,242,400 | 931,800 | 1,242,400 |
parameters | /(N/m) | /(N/m) | /(N/m) | /(N/m) |
value | 353,010 | 470,680 | 353,010 | 470,680 |
Table 2.
Kinds of spring failure.
Table 2.
Kinds of spring failure.
Kind | k1 | k2 | k3 | k4 |
---|
1 | failure | normal | normal | normal |
2 | normal | failure | normal | normal |
3 | failure | failure | normal | normal |
4 | failure | normal | failure | normal |
5 | failure | normal | normal | failure |
6 | normal | failure | normal | failure |
Table 3.
The influence rules among stiffness variation coefficients (SVCs) and amplitude variation coefficients (AVCs) with six kinds of spring failure.
Table 3.
The influence rules among stiffness variation coefficients (SVCs) and amplitude variation coefficients (AVCs) with six kinds of spring failure.
Failure Kind | AVCs |
---|
| | | | | | | | | | | |
---|
1 | + 1 | + | + | + | − 2 | − | − | + | − | − | + | + |
2 | − | − | − | − | − | − | + | − | − | + | + | − |
3 | ± 3 | ± | ± | ± | − | − | ± | ± | − | ± | + | ± |
4 | + | + | + | + | − | ± | − | ± | ± | ± | ± | ± |
5 | ± | ± | ± | ± | ± | − | − | ± | ± | − | ± | + |
6 | − | − | − | − | ± | − | ± | − | ± | ± | ± | ± |
Table 4.
The main parameters of data acquisition.
Table 4.
The main parameters of data acquisition.
Parameters | Value/Range |
---|
Sample frequency | 2500 Hz |
Sampling resolution | 16 |
Frequency range | 1–10 kHz |
Signal amplification ratio | 1:3 |
Output voltage range | ±5000 mV |
Acceleration range | 0–50 g |
Sensor sensitivity | 5 mV/ms−2 |
Table 5.
The steady state amplitudes of four spring seats in the x, y, and z directions under normal conditions.
Table 5.
The steady state amplitudes of four spring seats in the x, y, and z directions under normal conditions.
Directions | Amplitudes (mm) |
---|
Spring Seat 1 | Spring Seat 2 | Spring Seat 3 | Spring Seat 4 |
---|
x | 6.271 | 6.258 | 6.185 | 6.202 |
y | 6.613 | 6.096 | 6.694 | 6.116 |
z | 0.534 | 0.712 | 0.624 | 0.867 |