EP2986388B1 - Roll crusher and power train therefor - Google Patents

Description

The invention relates to a drive train for a roll crusher and a roll crusher comprising such a drive train, wherein the crushers are useful as crushing machines for minerals in the mining industry.

There are various types of roll crushers that are a subgroup of sizers known. A distinction is made between the number of rollers and the type of drive of the rollers. Often double roll crushers with two crushing rollers are used. These have a one-sided drive, ie only one roller is driven or a two-sided drive. By synchronizing the two crusher shafts both can be driven by a one-sided drive. In the powertrain, a transmission is usually provided between the engine and the crusher. Such a crusher is for example in the WO 2010 / 032037A presented. A disadvantage is in addition to the large space required for such a crusher and the high cost of alignment of the drive train.

Very often direct drives are used in mincing machines in the mining industry. Direct drive means here that the driving force is transmitted via shafts and possibly also transmissions or couplings. In addition, roll crushers are known in which the motors are arranged axially parallel to the crushing rollers next to the crusher and the power is transmitted to the crushing rollers by means of belt drive. Furthermore, in this embodiment, the axis of one of the crushing rollers is designed to be displaceable parallel to the axial direction, whereby an overload protection and adjustability of the crushing gap is ensured. An example of such crushers is presented in the brochure "C800 series hybrid" from the company Sandvik from the year 2010. A disadvantage is the resulting from the belt drive slip, which makes a defined pressure angle of the two crushing rollers to each other impossible and also a continuous grain size can not be guaranteed by the enlargement of the crushing gap in overload situations. Furthermore, the belt drive due to the large belt rollers requires increased security, must be protected from flying around Mineralbruch and is also expensive to maintain.

Furthermore, in the DE 19 08 48 4 A1 discloses a sintered cup whose structure is designed such that the grate and the crusher shaft are accessible without great effort. For this purpose, the drive is displaced and can be moved for reasons of accessibility in a retracted position. The disadvantage is the crusher shaft connected directly to the drive gear. Thus, load peaks occur in overload situations can transfer to the drive gear and to the crusher shaft bearings. This leads to increased wear of these components.

Object of the present invention is therefore to propose a drive train for a roll crusher, which allows a compact design of the roll crusher. The crusher should also be easy to set up and assemble.

The drive train according to the invention for a roll crusher has at least one transmission and one motor, the motor directly driving the drive shaft of the transmission and the output shaft of the transmission directly driving the roll crusher. Direct drive in the context of this document means that the power transmission is slip-free, not via a belt drive or the like. Drive and output shaft are arranged on the same side of the transmission, which is why the engine and the roll crusher must be arranged on the same side of the transmission. According to the invention, a propeller shaft is arranged between the engine and the transmission. Between the propeller shaft and the engine, and between the propeller shaft and the transmission, a clutch is arranged. Furthermore, a mounted intermediate shaft is arranged between the motor-side coupling and the propeller shaft. Advantageously, the drive train makes such a turn whereby the total length of a crusher can be significantly reduced.

According to the invention, a drive shaft is arranged between the engine and the transmission or between the transmission and the roll crusher. By using the propeller shaft, the motor or the crusher can advantageously be arranged offset to the transmission and thus a crusher can be constructed even smaller. Further advantageously eliminates the effort for alignment alignment of the motor shaft or the shaft of the crushing roller to the respective transmission shaft.

Furthermore, according to the invention, a clutch, in particular a fluid coupling, is arranged between the engine and the transmission. Advantageously, so the engine when starting up speed and torque build before a connection to the crushing roller exists.

Particularly preferably, an intermediate shaft is arranged between the fluid coupling and the propeller shaft. This is preferably mounted in a support on a motor platform, the base frame or on the crusher housing. As a result, the motor shaft is partially unloaded and must absorb any forces from the function of the PTO shaft. The fluid coupling is thus supported advantageously on the intermediate shaft and the engine mount.

Alternatively, a coupling, in particular a safety coupling, is likewise arranged between the drive shaft and the transmission. This coupling dissolves in case of overload and thus advantageously forms an overload protection of the crusher.

Further advantageously, a brake is provided which brakes or blocks the drive train when actuated. Advantageously, it can be ensured that when working in the crusher movement of the crushing rollers can be excluded. A rotation of the crushing rollers is to be feared for example by the change of the center of gravity of the roller by the removal of crushing tools. For example, the brake may be a disc brake mounted on the transmission or disposed at another position of the drive train.

The roll crusher according to the invention has at least two crushing rolls, wherein at least one crushing roll is driven by a drive train according to the invention described above. The roll crusher can be advantageously made considerably more compact by the / the motor (s) are arranged adjacent to the housing of the roll crusher.

Particularly preferably, the roll crusher on two crushing rollers, both of which are driven via a respective drive train. The motors in this configuration are both located immediately adjacent to the housing of the roll crusher. To ensure a constant pressure angle of both crushing rollers relative to each other, the crushing rollers can also be connected by synchronous wheels. The synchronizer wheels are arranged for example on the non-driven side of the crushing rollers near the storage in the housing wall of the roll crusher.

In an alternative embodiment, the roll crusher has two crushing rollers which are connected via synchronizing wheels, wherein only one crushing roller is driven by a drive train. The transmission of the drive torque for the second crushing roller then takes place via the synchronizing wheels.

The choice of concrete design of the roll crusher in terms of alternatives one or two drive trains or with synchronization or without depends on the requirements of the concrete crusher.

Particularly preferably, the or the motors are attached to the housing of the roll crusher. In addition, the transmission or the gearboxes may furthermore preferably also be fastened to the housing of the roll crusher. Advantageously can be dispensed with the use of a basic platform, which would be very stable and therefore costly due to the mechanical requirements and the high weights of the assemblies to be arranged and instead the already extremely stable designed crusher housing can be used. Advantageously, thus, the weight of the roll crusher can be significantly reduced.

Alternatively, roll crushers, engine and transmission can be arranged on a common base frame. In this case, the transmission is preferably articulated, whereby no constraining forces act on the base frame. Thus, the base frame advantageously no longer has to be made so stable, which reduces costs.

• Figur 1 einen erfindungsgemäßen Walzenbrecher mit zwei Brechwalzen und zwei erfindungsgemäßen Antriebssträngen,
• Figur 2 eine detailliertere Darstellung des erfindungsgemäßen Antriebsstrangs, und
• Figur 3 eine Draufsicht des Antriebsstrangs.

An embodiment of the invention will be explained below with reference to figures. Showing:

• FIG. 1 a roll crusher according to the invention with two crushing rollers and two drive trains according to the invention,
• FIG. 2 a more detailed representation of the drive train according to the invention, and
• FIG. 3 a top view of the drive train.

In FIG. 1 an inventive roll crusher with two drive trains is shown. The roll crusher has two crushing rollers 3, which are arranged in a housing 2. On one side of the housing 2, which is perpendicular to the crushing rollers 3, two gear 4 are arranged, the output shafts are arranged coaxially with the crushing rollers 3 and connected thereto.

The drive shafts are arranged on the same side of the transmission 4 as the output shafts but further outward so that the axis of the shaft is adjacent to the housing 2 of the roll crusher. In addition to the housing 2, two motors 6 are also arranged largely axially parallel to the crushing rollers 3, which drive in each case via a propeller shaft 8 of the transmission 4. Between the propeller shafts 8 and the motors 6 in each case a fluid coupling 7 is interposed. The fluid coupling 7 substantially improves the starting behavior when covering the roll crusher. At both ends of the propeller shafts 8 is a hinge. 9

FIG. 2 shows a closer view of a drive train according to the invention. The motor 6 is connected via the fluid coupling 7 with the propeller shaft 8, wherein between the propeller shaft 8 and the transmission still a safety coupling 11 is arranged, which serves the overload protection. At the, the gear 4 remote from the ends of the crushing roller 3 synchronizer wheels 10 are attached. The transmission 4 is on a transmission platform 41 and the engine 6 is arranged on a motor platform 61.

Between one of the motors 6 and one of the fluid couplings 7, a brake 5 is also arranged, which is designed as a disc brake. Since the two crushing rollers 3 via synchronous wheels (in the FIG. 1 not apparent) are synchronized, can be blocked with only one brake 5 in a drive train, the entire system.

FIG. 3 shows the drive train in a plan view. Visible is the lateral offset between the drive shaft of the transmission 4 and the shaft of the motor 6, which is compensated by the propeller shaft 8.

The motors 6 have a power of 560 kW, at a voltage of 6kV and operate at a rated speed of 1500rpm and a torque of 3.6kNm. The gear 4 are designed as a three-stage spur gear reducer. The crushing rollers 3 have a diameter of about 1.8m and a length of 2.6m.

LIST OF REFERENCE NUMBERS

1

base frame

2

casing

3

crushing roll

4

transmission

41

transmission podium

5

brake

6

engine

61

motor podium

7

fluid coupling

8th

propeller shaft

9

joint

10

Synchronrad

11

safety clutch

Claims (9)

1. A drive train for a roller crusher, having at least one transmission (4) and a motor (6), wherein the motor (6) drives the drive shaft of the transmission (4) directly and the output shaft of the transmission (4) drives the roller crusher directly, wherein the transmission (4) is designed such that the drive and output shafts are arranged on the same side of the transmission (4) and thus the motor (6) and roller crusher are also arranged on the same side of the transmission, wherein an articulated shaft (8) is arranged between the motor (6) and the transmission (4) and a coupling is arranged both between the articulated shaft (8) and the motor (6) and between the articulated shaft (8) and the transmission (4) and a mounted intermediate shaft is arranged between the coupling on the motor shaft and the articulated shaft.
2. The drive train in accordance with claim 1, wherein a brake (5) is provided, which brakes the drive train upon actuation.
3. A roller crusher having at least two crushing rollers (3), wherein at least one crushing roller (3) is driven by a drive train in accordance with one of the preceding claims.
4. The roller crusher in accordance with claim 3, wherein the roller crusher has two crushing rollers (3), which are both driven via a drive train each.
5. The roller crusher in accordance with claim 4, wherein the crushing rollers (3) are connected via synchronizing wheels.
6. The roller crusher in accordance with claim 3, wherein the crusher has two crushing rollers (3), which are connected via synchronizing wheels and only one crushing roller (3) is driven by the drive train.
7. The roller crusher in accordance with any one of the preceding claims, wherein the motor (6) is fastened to a housing (2) of the roller crusher.
8. The roller crusher in accordance with any one of the preceding claims, wherein the at least one transmission (4) is fastened to a housing (2) of the roller crusher.
9. The roller crusher in accordance with any one of claims 3-8, wherein the crusher, motor (6) and at least one transmission (4) are arranged on a common basic frame (1).

Images