DE102009045190A1 - Dry cylinder drive for paper, cardboard, tissue or coating machine to manufacture and process web material, has rotatable hollow cylinder around its longitudinal axis, where machining surface is attached at front end journal - Google Patents

Abstract

The dry cylinder has a rotatable hollow cylinder (15) around its longitudinal axis. A machining surface (11) is attached at front end journal (9), through which the cavity of the hollow cylinder is in connection with a working medium (12). A drive device is provided with a drive motor (3) and a belt drive (4).

Description

The invention relates to a drying cylinder or the like, a paper, board, tissue or coating machine for producing and / or processing a moving material web such as a fibrous web, consisting of a rotatable about its longitudinal axis mounted hollow cylinder with a working surface, at least one on the front side End mounted journal through which the cavity of the hollow cylinder with a working fluid can be supplied and a drive device.

For the purposes of the invention, the cylinders may also be paper guide rolls or any other roll.

Drying or drying cylinders with very large diameters are generally used in the dryer section of papermaking machines. The drying cylinders are heated from the inside with steam as a working medium, so that the fibrous web, which is transported over the working surface, the moisture removed or this is dried.

To drive the drying rollers or the like rollers usually electric motors are used which are connected via mechanical drive elements, such as propeller shafts, with the roller.

The control of the speed and the torques via a mechanical transmission or by means of an electronic control.

The drive must usually be placed outside of the dryer hood due to its size on the drive side of the machine, so that in a conversion is hardly possible, this z. B. on the operator side.

Due to this construction, it is also not possible to supply the rolls with steam as working medium on both sides or to suck off the condensate.

In the DE 8703410 U1 a drive is described which is arranged on a hollow shaft, so that the working medium can be supplied through the hollow shaft and condensate can be discharged. By supplying the steam, however, the engine is heated, so that a correspondingly great effort for the necessary engine cooling is created.

Furthermore, there are still various direct drive concepts, such. B. in the DE 10 2006 020 242 described, with the known direct drives, the supply of water vapor and condensate discharge can only be done on one side. Furthermore, the assembly is very expensive, since the motor axis must be brought into alignment with the roll axis.

In practice, it has been found that, in particular, when converting existing roller drives to individual drives, there is a great deal of effort involved in retrofitting in order to make the necessary changes to the frame and the roller so that the motor can be fastened and connected to the roller.

Object of the invention

It is therefore an object of the invention to provide an improved, simpler constructed drying cylinder drive, in which the disadvantages of the prior art are not available and is suitable for a quick conversions

Description of the invention

This object is achieved according to the invention with a drive for a drying cylinder having the features of patent claim 1. Advantageous embodiments and further developments of the drying cylinder drive resulting from the dependent of claim 1 claims.

According to the invention, a drying cylinder drive or the like for a paper, board, tissue or coating machine, for the production and / or processing of a moving material web such as a fibrous web, is proposed.

Wherein the drying cylinder consists of a rotatable about its longitudinal axis mounted hollow cylinder with a working surface and at least one mounted at the front ends bearing pin, through which the cavity of the hollow cylinder can be supplied with a working fluid. The drying cylinder is driven by means of at least one drive device, comprising at least one motor and a belt drive. The belt drive may be a flat belt or a toothed belt drive.

The regulation of the engine via a control and regulating device.

The belt drive enables a particularly resonance-free drive of the drying roller. In addition, existing machines can be easily converted to a direct drive concept without having to make extensive changes to the machine structure. In addition, the breakthroughs for z. B. the drive shafts in the dryer cover omitted, so that the heat loss of the dryer hood is reduced.

The drive belt of the belt drive preferably runs directly on a pulley associated with the hollow cylinder. That is, the belt can either run directly on a guide groove applied on the lateral surface of the hollow cylinder, outside the working surface, or on a pulley which is directly attached to the hollow cylinder and whose diameter is equal to or smaller than the working surface diameter. Or the pulley is inserted or incorporated directly into the working surface.

Furthermore, due to the simple structure, a belt drive can also be arranged on both sides of the working surface.

Since the surface of the drying cylinder is relatively hot, cooling of the belt running surface can additionally be provided.

In addition, it is relatively easy to drive several drying cylinders via a belt drive.

The supply of the drying cylinder with water vapor and / or the suction of the condensate can be done by this structure from both sides via the bushings in the journals.

Due to this design of the drying cylinder, it is particularly advantageous and easy to convert machines to a direct drive concept without having to make extensive changes to the machine frame.

In addition, eliminates the breakthroughs in the dryer hood which reduces the heat loss of the dryer hood and facilitates the construction.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

Show it:

1 : schematic view of a drying roller

2 : a side view on the drive

1 show a schematic view of a drying cylinder 1 as used in papermaking machines. The drying cylinders 1 usually have a length of up to 11 m and a diameter of about 1.8 m.

The drying cylinder 1 consists of a relatively thin-walled hollow cylinder 15 , the two-sided in the machine frame 2 is rotatably mounted. Wherein a drying section z. B. a paper machine from several drying cylinders 1 consists.

Through the hollow or the journal 9 becomes the working medium 12 , superheated steam, into the cavity of the drying cylinder 1 passed and the condensate on the condensate drainage 13 derived again.

Inside the roller, the water vapor gives its heat to the cylinder wall of the drying cylinder 1 from and is transferred from there to the paper web, which leads to the evaporation of the residual water content in the paper web.

The drying roller is driven by means of a drive motor 3 and a belt drive 4 ,

The belt drive 4 or the pulley is in the lateral surface of the hollow cylinder 15 integrated, so that the pulley outer diameter is equal to the drying cylinder diameter.

Preferably, the belt drive is in an area outside the work surface 11 positioned. It is also possible that both sides of the work surface 11 a belt drive 4 is positioned.

The drive is with the control and regulating device 14 controlled and regulated according to the specifications of the control system of the overall machine. In order to always be informed about the exact position and speed of the drying cylinder, an additional measuring system can be installed

In 2 is the drive of the drying cylinder 1 shown from the side, so you have a better view of the drive. Making the length of the belt 5 very easy to adjust, is a very flexible positioning of the drive motor 3 possible and thus an optimal adaptability to the machine in conversion situations possible. By means of a clamping and adjustment plate 6 can the belt drive 4 be aligned very easily. The cooling of the drive motor can also be provided very easily with a water cooling.

Another area of application for this drive is the drive of the paper-guide and spreader rolls in a paper machine.

LIST OF REFERENCE NUMBERS

1

drying cylinders

2

machine frame

3

drive motor

4

belt drive

5

drive belts

6

Clamping and adjustment plate

7

8th

9

pivot

10

camp

11

work surface

12

working medium

13

condensate drain

14

Control and regulating device

15

hollow cylinder

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 8703410 U1 [0008]
• DE 102006020242 [0009]

Claims (6)

Drying cylinder drive or the like for a paper, board, tissue or coating machine, for producing and / or processing a moving material web such as a fibrous web, consisting of a hollow cylinder rotatably mounted about its longitudinal axis (US Pat. 15 ), with a desktop ( 11 ), at least one mounted at the front ends bearing pin ( 9 ) through which the cavity of the hollow cylinder ( 15 ) with a working medium ( 12 ) and at least one drive device is characterized in that the drive device consists of at least one drive motor ( 3 ) and a belt drive ( 4 ) consists. Drying cylinder drive according to claim 1, characterized in that the drive belt ( 5 ) of the belt drive ( 4 ) directly on a hollow cylinder ( 1 ) associated pulley runs. Drying cylinder drive according to claim 1 or 2, characterized in that the two sides of the working surface ( 11 ) a belt drive ( 4 ) is arranged. Drying cylinder drive according to one of the preceding claims, characterized in that the pulley has an outer diameter which is equal to or smaller than the hollow cylinder diameter ( 15 ) and into the desktop ( 11 ) is embedded or attached to this. Drying cylinder drive according to one of the preceding claims, characterized in that the pulley or the belt running surface next to the working surface ( 11 ) is cooled. Drying cylinder drive according to one of the preceding claims, characterized in that a plurality of drying cylinders ( 1 ) via a belt drive ( 4 ) are driven.

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