Rotor replacing device for pulping machine

Abstract

The invention relates to a device for treating fibrous material, comprising a replacement device which can or is connected to a pivot arm. By means of the replacement device, the rotor can be moved out of the shell and maintained. The changing device (50) has a connecting element (52) for connecting the rotor (33) to the changing device (50) and a drive for the axial movement of the rotor. The rotor can be held and pivoted out of the device, in particular a refiner, by means of a changing device and a pivoting arm.

Description

[0001] The invention relates to an apparatus for processing fiber material, in particular a refiner, and a method for replacing a rotor by a processing tool.

[0002] Document DE 102020122645 A1 shows a pulping machine for processing fiber materials with two processing gaps. In order to form the processing gap, a first and a second processing tool are provided, wherein these processing tools cannot be pivoted. These processing tools are called static processing tools. A rotor with processing tools on both sides is arranged between these static processing tools. In order to process the fiber material, a fiber suspension is conveyed through the processing gap. At least one of the statically arranged grinding assemblies is arranged axially movable and adjustable. By moving these grinding assemblies, the width of the grinding gap can be set. In addition, the rotor is axially movable on the shaft, so that the width of the grinding gap is adjusted by the introduced fiber suspension.

[0003] Different fiber materials can be processed in a refiner. To process the different fiber materials, processing tools adapted to the requirements, also called modules or grinding modules, are available.

[0004] Components in the refiner need to be replaced due to wear of the components and in order to install components adapted to the use of the refiner. To do this, the cover of the refiner housing must be opened. The rotor replacement device with the pin is pivoted onto the drive shaft of the rotor and fixedly connected to it. The rotor assembly, also called the rotor, can then be pulled axially onto the pin. The rotor can now be pivoted out and then secured.

[0005] Document DE 100 84 327 T1 shows this double-disc refiner with a maintenance arm. Here, this maintenance arm should be fixed on the hub of the rotor so that the rotor is removed from the refiner housing.

[0006] Especially in double-gap refiners, it is necessary to dismantle the centrally arranged rotor in order to also access the components located axially behind the rotor. These rotors often weigh more than 75 kg. Due to this weight alone, movement of the rotor can be problematic. Furthermore, contamination of the shaft supporting the rotor can make axial movement of the rotor even more difficult.

[0007] The technical problem to be solved by the present invention is to provide a device for processing fiber materials, which makes the replacement of components more convenient, quick and safe.

[0008] This object is achieved by a device for treating fiber material having the features according to claim 1 and a method according to claim 14. Further advantageous features are contained in the dependent claims.

[0009] The replacement device according to the invention makes it easier to remove the rotor for maintenance work, in particular to replace worn handling tools. A connecting element is provided for fixedly connecting the rotor to the replacement device. By means of the connecting element, the rotor can be connected to the replacement device before the rotor is removed. In this way, the rotor is fixed. In addition, the replacement device has a drive. By means of the drive, the removal of the rotor from the drive shaft is made easier. In particular, in the case of significant wear on the bushing connection between the rotor and the drive shaft, it may be difficult to remove / move the rotor on the drive shaft. By means of the drive, the removal of the rotor from the drive shaft is assisted. Since the rotor is already fixed by the connecting element, it can be prevented from falling, which helps to increase safety.

[0010] The drive is designed for the axial movement of the rotor. The rotor can be removed from the drive shaft or pushed onto the drive shaft again by the drive. This makes disassembly significantly more convenient.

[0011] In one embodiment, it is provided that the drive comprises a transmission. The motion or force introduced by the drive can be converted by the transmission. Thus, in the case of a motor drive, a smaller drive can be used. This makes manual operation easier, especially in the case of a manual drive, and even enables manual operation from the outset. Preferably, the transmission ratio of the transmission is in the range of 10 to 40. In embodiments with a threaded spindle, a pitch of the thread in the range of 3 mm to 7 mm has proven to be advantageous.

[0012] In one embodiment, the transmission is designed as a screw transmission. The screw transmission is very compact and provides a high transmission ratio. Therefore, it can also be easily disassembled manually by one person.

[0013] In an alternative embodiment, the transmission is designed as a lever transmission.

[0014] Alternatively, the drive can be designed as a hydraulic cylinder piston drive. Such a hydraulic cylinder piston drive can be operated together with a pump as a linear drive and is available as a compact structural unit with a closed hydraulic circuit. Thus, the rotor changing device can be provided as a compact unit.

[0015] It has proven to be advantageous if the drive is a manual drive. Thus, the rotor changing device in particular does not require a power supply. Such a manual drive is very robust. Furthermore, during manual operation, malfunctions can be easily detected.

[0016] In a particularly convenient embodiment, a motor drive is provided. Preferably, a drive of a device for processing fiber material is used as the motor drive, wherein the transmission of the rotor changing device converts the pivoting movement of the drive into a linear movement in order to move the rotor in the axial direction of the changing device.

[0017] It has proven to be advantageous if the changing device is connected to the housing of the device in an articulated, preferably pivotable manner. The changing device can thus be mounted on and by the device, in particular by the refiner if the device is designed as a refiner, and is always available for maintenance work. Maintenance personnel do not have to carry heavy equipment for maintenance work.

[0018] Alternatively, it can be provided that the changing device is fixed on the pivot arm before maintenance. Therefore, one changing device can be used for multiple devices, thereby reducing the maintenance cost of the changing device.

[0019] In a preferred embodiment, an axial guide device is provided for the rotor. By means of the axial guide device, the rotor can be linearly guided downward from the drive shaft on the one hand, and can also be linearly guided in the replacement device. In particular, the connecting element performs a linear movement during the removal and installation process. It can be provided that the connecting element is also designed for supporting the rotor. In this way, a replacement device of particularly simple construction can be achieved. Alternatively, it can be provided that a supporting element, for example in the form of a pin, is provided for supporting the rotor by the replacement device. Then, the force required for the axial movement of the rotor only needs to be achieved by the connecting element, wherein the retaining force is provided by the pin. In this way, the connecting element can be designed more precisely. For the axial movement of the rotor, the force for the linear movement can be introduced in a decoupled manner. The rotor can be moved slidingly on the drive shaft and the pin. Therefore, disassembly can be carried out with particularly low force.

[0020] In a preferred embodiment, it is provided that the pin is connected to the drive shaft of the refiner, preferably screwed. As a result, a flush connection without a step can be provided between the pin and the shaft, which has a favorable effect on installation / removal. It can also be prevented that the changing device moves away during installation / removal. Alternatively, even in the case where the changing device is connected to the device, such as the refiner, by means of a pivoting arm, a blocking of the pivoting movement can be provided.

[0021] In one embodiment, it is provided that the changing device has a flange with an elongated hole as a connecting element. The elongated hole allows connection to the rotor without having to pre-position the rotor. This is advantageous in operation.

[0022] It has proven to be advantageous to equip a refiner with a changing device according to the invention. It is also possible to retrofit a refiner with a changing device according to the invention.

[0023] For particularly compact storage on the refiner, it has proven advantageous if the changing device is fastened to the refiner by means of a pivot arm, wherein the pivot arm can be pivoted into a plane defined by the pivot arm. The axial direction of the changing device preferably coincides with the plane of the pivot arm.

[0024] In a particularly advantageous embodiment, the pivot arm comprises two arms, wherein the changing device can be positioned between the two arms when the changing device is not used for changing the rotor.

[0025] To replace components in a refiner, the following method steps are provided:

[0026] -Open the refiner housing.

[0027] - The rotor is mounted on a drive shaft in the refiner. The rotor is either fixedly connected to the drive shaft or mounted on the drive shaft so that it can be axially displaced. The rotor is released so that it can be removed from the drive shaft.

[0028] - Position the changing device in front of the rotor, in most cases pivot it to the front of the rotor.

[0029] -Fix the rotor to the connecting element. If the connecting element is designed as a flange, the rotor can be connected to the flange, for example by screws. If the flange has a slotted hole, the screw connection can be realized particularly easily. The rotor is thus already fixed and cannot fall out.

[0030] The changing device is secured so that only individual parts of the changing device can be moved, but the changing device as a whole cannot be moved, in particular cannot be removed from the refiner.

[0031] -The rotor is supported by a replacement device for driving the rotor to perform linear motion.

[0032] - Pivot the rotor out.

[0033] Subsequently, the components previously covered by the rotor and the components of the rotor facing away from the replacement device can be replaced. For installation, the steps are performed in reverse order.

[0034] Other advantageous features of the present invention are explained based on the embodiments in conjunction with the accompanying drawings.

[0035] Figure 1 A schematic diagram showing a rotor changing device according to the invention on a pivot arm in a refiner,

[0036] Figure 2 Show Figure 1 A perspective view of the changing device shown on a pivot arm,

[0037] Figure 3 A refiner with a replacement device and a rotor in a housing is shown,

[0038] Figure 4 A refiner is shown with a changing device and a rotor received by the changing device,

[0039] Figure 5 A refiner apparatus is shown.

[0040] exist Figure 5 2 shows a refiner device 2. The refiner device 2 comprises a refiner 1. The refiner 1 has an inlet for the fiber suspension to be treated and an outlet 13 for the treated fiber suspension. The refiner housing 21 comprises a housing cover 23. An adjustment device 9 for setting the gap width is arranged on the refiner cover. By means of the adjustment device 9, the axial position of the stator 29 arranged in the housing cover 23 can be adjusted and set. The refiner drive 3 is connected to the refiner, in particular to the rotor 33 arranged in the refiner housing, via a transmission 5 and a coupling 7.

[0041] The operation of the refiner device 2 is described below. The fiber suspension enters the refiner housing 21 through the inlet opening 11 and is provided with two grinding gaps 37 in the case of a double disc refiner 1 designed with a double gap 39. The fiber suspension passes through the grinding gaps 37 from the radial inside to the radial outside. In the process, the fiber suspension is ground between the grinding assembly 27 and the two stators 29 on the rotating rotor 33 and leaves the refiner 1 through the outlet opening 13. The power is regulated via the grinding gaps 37. The stator support 31 is axially displaced by the adjusting device 9. The width of the grinding gap 37 and the consumed power are thereby varied. The rotor 33 is supported on the axially fixed shaft 25 and can be freely displaced in the axial direction. The fiber suspension can be distributed to the two grinding gaps 37 via the openings in the rotor 33. Due to the floating bearing arrangement of the rotor 33, the processing conditions of the two grinding gaps 27 are established independently. In the event of a break in the fiber suspension, the load can be quickly relieved by the adjusting device 9. In the event of damage or due to wear, the grinding assembly needs to be replaced regularly. For this purpose, a replacement device 50 is used.

[0042] according to Figure 1 and Figure 2 The changing device 50 is described further.

[0043] The changing device 50 has a drive 51. Here, a screw drive 63 with a manual operating device is shown. The screw drive 63 acts on an element guided by an axial guide, which is fixedly connected to a pin 75 for accommodating the rotor 33. On the side of the axial guide 59 facing away from the screw drive 63, a flange 71 is fixedly connected to the axial guide 59 as a connecting element 52. The flange 71 has an elongated hole 73. The flange can be fixedly screwed to the rotor by means of the elongated hole. In order to carry out an axial movement of the changing device 50 in the axial direction 67, an axial force can be transmitted to the flange 71 as a connecting element 52 by means of the screw drive 63, and thus to the rotor 33 connected to the flange 71. The flange 71 is arranged coaxially with a pin 75 as a supporting element 60 designed to support the rotor 33. The pin 75 can be fixedly connected, in particular screwed, to the drive shaft 25 of the refiner via the shaft connection 65. In this figure, all bolts are marked with the reference numeral 70. In order to compactly support the changing device 50, a pivot arm 55 connected to the refiner housing 21 can be used. The pivot arm shown here comprises two arms 56. The changing device 50 can be pivoted between the two arms 56 of the pivot arm and thus form a compact unit with the pivot arm 55. The changing device 50, in particular the pin 75, is connected to the arm 56 of the pivot arm 55 via a hinge. The pivot arm itself is connected to the housing 21 of the refiner 1 via an articulation 53, as shown in FIG. Figure 3 and Figure 4 shown.

[0044] Figure 3 The changing device 50 is shown, wherein the pins 75 have been turned outwards for receiving and supporting the rotor 33. Before the changing device 50 is pivoted in front of the rotor 33, the stop 35 is removed. The stop 35 is designed to limit the axial movement of the rotor 33 which is floatingly supported on the drive shaft 25.

[0045] like Figure 4 As shown, the changing device 50 is pivoted to the front of the rotor 33. First, the flange 71 is bolted to the rotor 33 and the drive shaft 25 is bolted to the pin 75. By the fixed connection of the rotor 33 to the flange 71, the rotor is already fixed.

[0046] The drive 51 is now operated, thereby pulling the rotor 33 onto the pin 75. The connection to the drive shaft 25 of the refiner is then released again and the changing device 50 is pivoted. The rotor 33 is pivoted out of the refiner housing 21 by means of the changing device 50 and the pivot arm 55. The newly exposed grinding assembly 27 can now be replaced. Subsequently, the rotor 33 can be pivoted again and positioned again in front of the drive shaft 25 of the refiner. The pin 75 is connected to the drive shaft 25. By operating the drive 51, the rotor 33 is pushed onto the drive shaft 25. The connection to the flange 71 is released again, and the changing device 50 and the pivot arm can be pivoted back to the initial position. The stop 35 is screwed back onto the drive shaft 25 and the housing 21 can be closed again, or if this has not yet been done, the front grinding assembly 27 can be replaced before this, or other maintenance work can still be carried out.

[0047] List of Reference Numerals

[0048] 1 Equipment for processing fiber materials, pulping machines

[0049] 2 Refiner equipment

[0050] 3 Refiner drive

[0051] 5 Transmission

[0052] 7 Coupling

[0053] 9. Adjustment device (stator)

[0054] 11 Feeding port

[0055] 13 Discharge port

[0056] 21 Shell

[0057] 23 Housing cover

[0058] 25 axis / drive shaft

[0059] 27Handling tools, grinding components

[0060] 29 Stator

[0061] 31 stator bracket

[0062] 33 Rotor

[0063] 35 Stop for rotor

[0064] 37 Grinding gap / processing gap

[0065] 39 Double Gap

[0066] 50 Replacement device

[0067] 51 Driver

[0068] 52 Connecting elements

[0069] 53 Articulated device

[0070] 55 Pivot Arm

[0071] 56 Pivoting arm arm

[0072] 57 Hinge

[0073] 59 Axial guide device

[0074] 60 Support element

[0075] 61 Transmission

[0076] 63 Screw drive

[0077] 65 Shaft connection device

[0078] 67 Axial direction of the replacement device

[0079] 70 Bolt

[0080] 71 Flange

[0081] 73 Long hole

[0082] 75 Pins

[0083] 77 Pin connection device

[0084] 70 Bolt

Claims

1. A device (1) for processing fiber material, wherein: The device comprises a housing (21) in which a plurality of processing tools (27) facing each other for forming a processing gap (37) are arranged, wherein one of the processing tools (27) is arranged together with a rotor (33) connected to a shaft (25) in a rotationally fixed manner, and wherein the housing comprises a pivotally supported housing cover (23) and a pivot arm (55) for pivoting the rotor (33) out of the housing, characterized in that a replacement device (50) is connected or connectable to the pivot arm (55), and the replacement device (50) comprises a connecting element (52) for connecting to the rotor (33) and a drive (51), wherein the drive is used to provide an axial movement of the rotor (33) in order to remove the rotor from the shaft (25).

2. The device (1) according to claim 1, characterized in that The drive (51) comprises a transmission (61), which preferably has a transmission ratio of at least 10, preferably a transmission ratio of between 10 and 40.

3. The device according to any of the preceding claims, characterized in that The transmission device (61) is designed as a screw transmission device, wherein the axial height of the screw thread per rotation is preferably 3 mm to 7 mm.

4. A device according to any preceding claim, characterised in that The transmission device (61) is designed as a lever transmission device.

5. A device according to any preceding claim, characterised in that The drive (51) is designed as a hydraulic cylinder piston drive.

6. Apparatus according to any preceding claim, characterised in that The drive is a manual drive.

7. Apparatus according to any preceding claim, characterised in that The changing device (50) can be coupled to a motor drive, preferably a refiner drive (3), for axial (67) motor drive.

8. Apparatus according to any preceding claim, characterised in that The replacement device (50) is connected to the housing (21) via first and second pivot axes.

9. Apparatus according to any preceding claim, characterised in that An axial guide device (59) is provided for the rotor (33).

10. Apparatus according to any preceding claim, characterised in that The changing device (50) has a bearing element (60), preferably a pin (75), for the rotor (33).

11. Apparatus according to any preceding claim, characterised in that The changing device (50) has a flange (71) provided with an elongated hole (73) as a connecting element (52) connected to the rotor (33).

12. Apparatus according to any preceding claim, characterised in that The equipment is a refiner.

13. The refiner according to claim 12, characterized in that The changing device (50) is connected to the refiner housing (21) via a pivot arm (55), wherein the changing device (50) is preferably connected to the pivot arm (55) in an articulated manner and can be pivoted between two arms (56) of the pivot arm (55).

14. A method for disassembling a rotor (33) of a refiner (1), the method comprising the following steps: - Open the refiner housing (21, 23), -loose rotor, - pivoting the changing device (50) to the front of the rotor (33), - connecting the rotor (33) to the connecting element (52) and fixing the changing device, - driving the rotor in the axial direction of the changing device (50) so that the rotor is supported by the changing device (50), - Pivoting the rotor (33) out.

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