DRUM-TYPE SHEARER LOADER, AND A SHEARER DRUM OF A DRUM-TYPE SHEARER LOADER

Abstract

A drum-type shearer loader for the extraction of mineral material in the mining sector, has at least one shearer drum (1), which is mounted rotatably on a pivotable support arm (2) and which is driven by a drive motor (4) arranged at an end of the support arm (2), in the region of a support arm head (3). A compact drive unit for all operating states is provided with the drive motor (4) in the form of a permanent-magnet-excited synchronous machine which, during operation of the shearer drum (1), provides the entire drive power required for rotating the shearer drum (1).

Claims

1. A drum shearer loader for extracting mineral material in mining, the shearer loader comprising: a pivotable support arm; at least one shearer drum is mounted rotatably in the pivotable support arm, at a support arm end; a driving motor arranged at the support arm end in an area of a support arm head, wherein the driving motor is configured as a permanent magnet-excited synchronous machine, which provides a total driving power needed for rotation of the shearer drum during operation of the shearer drum.

2. A drum shearer loader in accordance with claim 1, further comprising a frequency converter configured to at least at times feed the driving motor.

3. A drum shearer loader in accordance with claim 2, wherein the frequency converter is configured to regulate the driving motor on the basis of a maximum torque and/or of a minimum current demand as a command variable.

4. A drum shearer loader in accordance with claim 3, wherein the regulation of the driving motor is based on a vector regulation.

5. A drum shearer loader in accordance with claim 1, wherein starting torque is made available by the driving motor at least at times, so that a ratio of the starting torque to the nominal torque assumes a value of 3.0 to 6.0 and $\frac{\mathrm{Starting}.Math..Math.\mathrm{torque}}{\mathrm{Nominal}.Math..Math.\mathrm{torque}}=3.0.Math..Math.\mathrm{.Math.}.Math..Math.6.0,$ is thus true.

6. A drum shearer loader in accordance with claim 1, further comprising a transmission gear, with at least one gear stag, provided between the driving motor and the shearer drum.

7. A drum shearer loader in accordance with claim 1, wherein an axis of rotation of the driving motor is oriented coaxially to the axis of rotation of the shearer drum.

8. A drum shearer loader in accordance with claim 6, wherein an overall transmission of the transmission gear with at least one gear stage has a value of 30 to 40.

9. A drum shearer loader in accordance with claim 6, wherein the transmission gear has at least one planet gear.

10. A drum shearer loader in accordance with claim 1, wherein the transmission gear comprises a miter gear between the driving motor and the shearer drum.

11. A drum shearer loader in accordance with claim 10, wherein the miter gear has a transmission ranging from 1.1 to 5.0.

12. A drum shearer loader in accordance with claim 1, wherein the driving motor is integrated at least partly into the support arm.

13. A drum shearer loader in accordance with claim 1, wherein the driving motor has water jacket cooling of the stator providing an only added means of cooling.

14. A drum shearer loader in accordance with claim 13, wherein the water jacket cooling of the stator is connected to the cooling system of the shearer drum and/or is operated with the same cooling liquid as the cooling system of the shearer drum.

15. A drum shearer loader in accordance with claim 1, wherein the driving motor configured as a permanent magnet-excited synchronous machine has a high reluctance share.

16. A shearer drum, which is mounted rotatably at a support arm head of a pivotable support arm of a drum shearer loader for a selective extraction of minerals, the shearer drum comprising: a driving motor arranged at the support arm head of the pivotable support arm and is in functional connection with the shearer drum via means for torque transmission, wherein the driving motor is configured as a permanent magnet-excited synchronous motor, which provides a total driving power necessary for rotating the shearer drum during the operation of the shearer drum.

17. A drum shearer loader in accordance with claim 4, wherein the regulation of the driving motor is based on a d-q regulation.

18. A drum shearer loader in accordance with claim 6, wherein an axis of rotation of the driving motor is oriented coaxially to an axis of rotation of the transmission gear arranged between the driving motor and the shearer drum.

19. A drum shearer loader in accordance with claim 6, wherein an axis of rotation of the driving motor is oriented coaxially to an axis of rotation of the shearer drum and to an axis of rotation of the transmission gear arranged between the driving motor and the shearer drum.

20. A drum shearer loader in accordance with claim 6, wherein the transmission gear comprises two planet gears.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the drawings:

[0032] FIG. 1 is a top view of the support arm of a drum-type shearer loader with a shearer drum and a driving motor of a slim configuration arranged at the support arm head;

[0033] FIG. 2 is a side view of the support arm with synchronous motor of a slim configuration, which is arranged opposite the shearer drum;

[0034] FIG. 3 is a top view of the support arm of a drum-type shearer loader with a shearer drum arranged at the support arm head and with a driving motor of a cubic configuration; and

[0035] FIG. 4 is a side view of the support arm with a synchronous motor of a slim configuration, which is arranged opposite the shearer drum and is connected via a miter gear to the shearer drum.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0036] Referring to the drawings, FIG. 1 shows in a top view the pivotably mounted support arm 2 of a drum-type shearer loader, at which a shearer drum 1 and the drive thereof are arranged in the area of the support arm head 3. According to the exemplary embodiment shown, the shearer drum 1 is driven exclusively by means of a driving motor 4, which is configured as a permanent magnet-excited synchronous motor and is likewise arranged in the area of the support arm head 3. It is essential for the arrangement of the driving motor 4 relative to the shearer drum 1 that the axes of rotation of the driving synchronous motor 4, of the transmission gear 6, which has two planet gear stages 8, and of the shearer drum 1 extend coaxially to one another, and that the driving motor 4 is at least partially integrated into the support arm 2 on the side of the support arm 2 facing away from the shearer drum 1.

[0037] The permanent magnet-excited synchronous motor 4 shown schematically in FIG. 1 is configured as a slim motor, whose motor length exceeds the motor diameter. The driving motor 4 is integrated at least partially into the support arm 2, here in the area of the support arm head 3, which leads to an additional reduction of the space requirement, so that an especially compact and yet high-power driving unit is provided for the shearer drum 1 of a drum-type shearer loader.

[0038] The permanent magnet-excited synchronous motor 4, which is used as the exclusive drive of the shearer drum 1, is characterized by a high power density and is fed via a frequency converter 5, so that a reliable and precise starting as well as a reliable, tailor-made regulation of the driving motor 4 and hence of the rotation of the drum are guaranteed during the operation. Compared to the asynchronous motors usually used as a drive, a higher motor power is provided with the technical solution according to the present invention in an equal installation space. This is also the reason why driving powers of up to 2,000 kW, which bring about the rotation of the shearer drum 1, can be provided in the area of the support arm head 3 despite the provision of only one driving motor 4 bringing about the rotation of the shearer drum 1. It is thus possible to select the suitable permanent magnet-excited synchronous motor 4 from a power range of 250 kW to 2,000 kW corresponding to the requirements. Furthermore, the embodiment shown in FIG. 1, which is based on the present invention, is characterized by a comparatively short section, over which the power of the driving motor 4 is transmitted to the shearer drum 1. Complicated gear chains along the support arm 2 or other means, with which the rotation of the power take-off shaft of the driving motor 4 is transmitted to the shearer drum 1 over long sections, are therefore unnecessary.

[0039] The speed of the synchronous motor 4 shown is in the range of 800 rpm to 1,500 rpm, but it may be increased to a value of 5,000 rpm if the intended use of the drum-type shearer loader requires this, when selecting special motors.

[0040] Further, the gear stages of the transmission gear 6, which are used in the exemplary embodiment shown in FIG. 1 and are each configured as planet gears 8 in the area of the hub 9 of the shearer drum, are configured such that they provide an overall transmission of 30 to 40. It is additionally conceivable to arrange an additional gear stage with a transmission ranging from 2.5 to 3.5 in front of the two gear stages 6 in order to expand the overall transmission to a value of up to 140 in this manner.

[0041] FIG. 2 shows an additional representation of a side view of the arrangement of a shearer drum 1 with a permanent magnet-excited synchronous motor 4 as an exclusive drive in the area of the support arm head 3, which arrangement is described in FIG. 1. The driving motor 4 configured as a permanent magnet-excited synchronous motor can be seen in the side view according to FIG. 2 in an unobstructed view, while the shearer drum 1 is arranged on the opposite side of the support arm 2. The synchronous motor 4, having a slim configuration, is adapted, especially in terms of its diameter or of the external diameter of the motor housing, to the width of the support arm 2 in the area of the axis of rotation of the shearer drum. The diameter of the driving motor 4 thus corresponds at least approximately to the width or depth of the support arm 2 in this area.

[0042] A permanent magnet-excited synchronous motor 4 with an output power of 800 kW is used in the embodiment of the present invention shown in FIG. 2. Such a driving motor 4 of a slim configuration has a diameter in the range of 500 mm to 700 mm and a length of 1,200 mm to 1,400 mm.

[0043] FIG. 3 shows another suitable embodiment of a driving motor 4 configured as a permanent magnet-excited synchronous motor for a shearer drum 1 of a drum-type shearer loader. The shearer drum 1 is driven or rotated in this case as well exclusively with the driving motor 4 arranged in this area of the support arm head 3. The axes of rotation of the driving motor 4, of the transmission gear 6 as well as of the shearer drum 1 likewise extend coaxially. Contrary to the driving motor 4 shown in FIG. 2, the driving motor 4 according to FIG. 3 has an at least nearly cubic configuration in relation to the dimensions of the motor housing. The diameter of the motor 4 as well as the length of the motor are thus at least approximately equal. The diameter of the driving motor 4 and of the motor housing corresponds in this embodiment at least nearly to the diameter of the support arm head 3 and hence also to the diameter of the hub 9 of the shearer drum 1. The advantage of this embodiment is that the width of the drum-type shearer loader is minimized in the area of the shearer drum 1.

[0044] A permanent magnet-excited synchronous motor 4 with an output power of 800 kW may likewise be used in the special embodiment of the present invention shown in FIG. 3. Such a motor 4 of a cubic configuration has a diameter in the range of 500 mm to 700 mm and a length of 1,200 mm to 1,400 mm.

[0045] FIG. 4 shows another possible arrangement of a permanent magnet-excited synchronous motor 4, which is a part of a drive train arranged at the support arm head 3 of the support arm 2 of a drum-type shearer loader. An essential feature of the arrangement shown in FIG. 4 is that the axis of rotation of the driving motor 4 forms an angle with the axis of rotation of the shearer drum 1, which angle preferably equals 90. In order to make it possible to obtain such an arrangement, a miter gear 7 is provided as an additional component of the transmission gear 6 between the driving motor 4 and the shearer drum 1. The torque and power transmission from the driving motor 4 to the shearer drum consequently takes place via the miter gear 7 as well as the planet gears 8 arranged within the hub 9 of the shearer drum.

[0046] According to the embodiment shown in FIG. 4, the diameter of the driving motor 4 is again adapted to the dimensions of the support arm 2. The diameter of the motor 4 corresponds, in particular, essentially to the width or depth of the support arm 2 in the area of the support arm head 3. The corresponding dimensions are shown in FIG. 4.

[0047] The provision of a miter gear 7 between the driving motor 4 and the shearer drum 1, both of which are arranged in the area of the support arm head 3, offers the possibility of optimizing the torque, the speed as well as the overall size of the motor and/or the transmission and the overall size of the planet gears 8 arranged in the area of the hub of the shearer drum. If a permanent magnet-excited synchronous motor 4 with an output power of 800 kW is used for the embodiment according to FIG. 4, this has a diameter of 500 mm to 700 mm, here 560 mm, and a resulting motor length of 700 mm to 1,000, here 850 mm.

[0048] While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.