Belt-conveying installation, method for operating the same, and use thereof
View Patent ↗A belt-conveying installation has at least one carrying structure, a conveying belt and at least one drive apparatus for driving the conveying belt. The drive apparatus includes at least one drive shaft, at least one drive-shaft-bearing arrangement, at least one drive roller and at least one independently excited drive motor in the form of a frequency-converter-fed alternating-current synchronous motor with a stator and a rotor. The drive shaft and the at least one drive motor are connected to one another without any gearing, and the rotor and drive shaft are arranged coaxially, each drive shaft being guided through at least one rotor. The belt-conveying installation can be operated and used for heavy industry, in particular for the extractive or mining industry.
1. A belt-conveying installation for heavy industry, comprising:
a support structure;
a conveying belt; and
a drive apparatus to drive the conveying belt, the drive apparatus comprising: a drive roller driving the conveyor belt in rotation;
an independently excited drive motor in the form of an alternating current synchronous motor which is fed by a frequency converter, is supported by the supporting structure, and has a stator and a rotor;
a drive shaft rotating the drive roller, connected to the drive motor without any gearing, and rotated by the drive motor, the drive shaft and the rotor being arranged coaxially, the drive shaft being guided through the rotor; and
a drive shaft bearing arrangement supporting the drive shaft,
wherein the rotor of the drive motor is configured to rotate at a rotational speed up to 80 revolutions per minute for extracting or mining applications.
2. The belt-conveying installation as claimed in claim 1 ,
wherein the rotor encloses the drive shaft,
the rotor is mechanically permanently connected to the drive shaft, and the drive shaft is mechanically permanently connected to the drive roller.
3. The belt-conveying installation as claimed in claim 2 , wherein the drive shaft is rotatably supported by the drive shaft bearing arrangement.
4. The belt-conveying installation as claimed in claim 3 , wherein the stator is mechanically permanently connected to the drive shaft bearing arrangement.
5. The belt-conveying installation as claimed in claim 3 , wherein the stator is mechanically permanently connected to the support structure, and the stator is also connected via at a stator bearing arrangement to the drive shaft.
6. The belt-conveying installation as claimed in claim 5 , wherein
the drive shaft is longitudinally separated into first and second drive shaft sections,
the first drive shaft section is connected to the drive roller,
the second drive shaft section is connected to the drive motor, and
the first and second drive shaft sections are interconnected via an elastic coupling device.
7. The belt-conveying installation as claimed in claim 6 , wherein
a stator bearing arrangement supports the stator and is arranged adjacent to the drive shaft bearing arrangement, and
the elastic coupling device is arranged between the drive shaft bearing arrangement and the stator bearing arrangement.
8. The belt-conveying installation as claimed in claim 5 , wherein
the drive shaft is longitudinally separated into first and second drive shaft sections,
the first drive shaft section is connected to the drive roller,
the second drive shaft section is connected to the drive motor, and
the first and second drive shaft sections are interconnected via an articulated device.
9. The belt-conveying installation as claimed in claim 8 , wherein a stator bearing arrangement supports the stator, and
the articulated device is arranged between the drive shaft bearing arrangement and the stator bearing arrangement.
10. The belt-conveying installation as claimed in claim 8 , wherein a stator bearing arrangement comprises two stator bearings, and
the articulated device is arranged between the two stator bearings.
11. The belt-conveying installation as claimed in claim 1 , wherein the rotor is arranged to the side of the drive roller, and the rotor is mechanically permanently connected to the drive roller.
12. The belt-conveying installation as claimed in claim 11 ,
wherein the drive roller, which is connected to the rotor, is connected via at least one drive roller bearing arrangement to the drive shaft, and
the drive shaft is fixed.
13. The belt-conveying installation as claimed in claim 12 , wherein the stator is arranged on the drive shaft, which is fixed.
14. The belt-conveying installation as claimed in claim 11 , wherein
the drive roller, which is connected to the rotor, is mechanically permanently connected to the drive shaft,
the drive shaft is rotatably supported by the drive shaft bearing arrangement, and the stator is mechanically permanently connected to the drive shaft bearing arrangement.
15. The belt-conveying installation as claimed in claim 1 , wherein the support structure comprises a support framework and a transport device to move the belt-conveying installation from one location to another.
16. The belt-conveying installation as claimed in claim 15 , wherein the transport device comprises skids and/or wheels.
17. The belt-conveying installation as claimed in claim 16 , wherein the wheels are driven by a drive module attached to the support framework.
18. The belt-conveying installation as claimed in claim 15 , wherein the transport device comprises crawler treads.
19. The belt-conveying installation as claimed in claim 1 , wherein the drive motor, the drive shaft and the drive roller are mounted to move together and maintain a predetermined gap between the stator and rotor.
20. The belt-conveying installation as claimed in claim 1 , wherein the rotor of the drive motor rotates during operation at the rotational speed in a range of 30-70 revolutions per minute.
21. A method comprising:
operating a conveying belt of a belt-conveying installation, at a delivery speed of less than 13 m/s, the belt-conveying installation, comprising: a support structure; and
a drive apparatus to drive the conveying belt, the drive apparatus comprising; a drive roller driving the conveyor belt in rotation;
an independently excited drive motor in the form of an alternating current synchronous motor which is fed by a frequency converter and has a stator and a rotor;
a drive shaft rotating the drive roller, connected to the drive motor without any gearing, and rotated by the drive motor, the drive shaft and the rotor being arranged coaxially, the drive shaft being guided through the rotor; and a drive shaft bearing arrangement rotatably supporting the drive shaft,
wherein the rotor of the drive motor is configured to rotate at a rotational speed up to 80 revolutions per minute for extracting or mining applications.
22. The method as claimed in claim 21 , further comprising a transport device to move the belt-conveying installation from one location to another.
23. The method as claimed in claim 21 , wherein the rotor of the drive motor rotates during operation at the rotational speed in a range of 30-70 revolutions per minute.
24. A material extraction method comprising: receiving an extracted material;
loading the extracted material on a conveying belt;
driving a drive roller on which the conveying belt is mounted to rotate the conveying belt, with a drive apparatus, the drive apparatus comprising:
an independently excited drive motor in the form of an alternating current synchronous motor which is fed by a frequency converter and has a stator and a rotor;
a drive shaft rotating the drive roller, connected to the drive motor without any gearing, and rotated by the drive motor, the drive shaft and the rotor being arranged coaxially, the drive shaft being guided through the rotor; and a drive shaft bearing rotatably supporting the drive shaft; and delivering the extracted material on the conveying belt at a speed of less than 13 m/s,
wherein the rotor of the drive motor is configured to rotate at a rotational speed up to 80 revolutions per minute for extracting or mining applications.
25. A material extraction method of claim 24 , wherein the rotor of the drive motor rotates during operation at the rotational speed in a range of 30-70 revolutions per minute.