FI122270B - Roller clamping device - Google Patents

Description

Roller clamp roller

The invention relates to a roll shell press roll which is fixed to the carrier plates, rotatably mounted on a fixed carrier and movable by a carrier in the axial direction, whereby the roll shell can be subjected to tension on the carrier plates 5 by an effective clamping device.

Such press rollers known in the art are used together with counter rolls for dewatering the pulp web, in particular paper or pulp, whereby the pulp dewatering strip is guided, if necessary, in parallel with the suction roll, e.g. between. To increase the effective surface between the counter roll and the roll shell and to improve the drainage, a press shoe is provided inside the roll shell by means of which the roll shell is pressed against the counter roll. Due to the high pressure exerted by the press shoe on the roll sheath, the roll sheath is worn to a considerable extent, so that the roll sheath is axially displaceable with the press shoe to distribute the load of the roll sheath evenly along its length.

This adjustment is made in accordance with the state of the art, for example, by means of compression springs and spindles or two hydraulic cylinders fitted inside the roll casing. For spindle adjustment, this is done by turning the spindle outside the press unit. The hydraulic control requires a relatively complex control program since the hydraulic cylinders 20 are dual-acting and the control must take into account the different adjustment forces due to the different surface area of the base and piston rod.

The object of the invention is to simplify the adjustment of the roll of the press roll.

The object is achieved by a press roll having the features of claim 1.

In connection with the invention, the biasing and adjustment of the roll diaper is achieved by a combination of at least one, preferably 25, more press clamps and at least one, preferably several o pressure cylinders, the pressure cylinders tensioning the σ ≤ 7 compression springs on the other hand. very simply, e.g.

i | with a hydraulic cylinder-related distance measurement system. However, it is i ^. It is also possible to use a pressure measuring system that measures the pressure in the hydraulic cylinder or hydraulic system CBS) because the spring characteristic of the compression springs is known and can be substantially linear so that the position of the roll shell 0511 can be accurately determined by hydraulic pressure.

2

The invention also provides the advantage that the roll diaper, for example for changing the diaper, can be lightened very simply by relieving pressure from the pressure cylinder (s), since the roll diaper automatically moves to a predetermined rest position under the action of the compression spring (s).

Preferred embodiments of the invention are claimed in the subclaims.

A preferred embodiment of the invention will now be described with reference to the accompanying drawings. Figure 1 is an axial sectional view of the press roll of the invention, Figure 2 is a sectional view of the press roll of Figure 1, Figure 3 is a sectional view of the press roll of Figure 1 on an enlarged scale and Figure 4 is a schematic representation of the arrangement of Figure 1.

Fig. 1 is a longitudinal sectional view of a press roll according to the invention comprising a roll sheath 1, a fixed support 2 and a press shoe 3. The press shoe 3 is attached to a support 2. The roll sheath 1 is depressed by a non-shown counter roll against the press shoe 15.

The roll sheath 1 is mounted on the support 2 by means of support plates 4, whereby the support plates 4 consist essentially of an inner ring 5 and an outer ring 6 which can rotate through the rolling bearing 7 relative to one another. The inner rings 5 of the support plates 4 are displaceably mounted by the sliding sleeves 8, whereby the sliding sleeves 8 themselves are permanently attached to the bracket 2.

By moving the support plates 4 at the same time the double arrow 9 in the direction of the roll shell 1 can be moved relative to the press shoe 3 relative to that generated against the press shoe 3 roll shell 1 presses the load may be divided into the roll shell 1 over the entire length, the roll shell 1 continuously or at regular intervals, are moved back and forth ^ 25 along the double arrow 9.

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For proper operation of the press roll, the roll shell 1 must be continuously subjected to tensile stress in the axis 10 ^. On the one hand, in order to maintain this tensile stress and <D> on the other hand to effect displacement of the roll shell 1,

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a clamping device comprising clamping springs 11 and clamping cylinders 12. The clamping springs 11 30 and the clamping cylinders 12 are fixed on one hand to the bracket 2 and on the other hand to the 31 clamping rings 13, the clamping rings 13 being supported on the inner rings o the compression direction.

In its simplest embodiment, the pressurized cylinders 12 may be single acting pressurized cylinders which, in use, also provide a clamping force 3 between the bracket 2 and the clamping ring 13. degree of raising or lowering the pressure occurs paineainesylinteriin 12 of compression of the spring 11 corresponding to the characteristic of the roll mantle transition to the double arrow 9 in the direction.

With this very simple technical embodiment of the invention, the control of the adjustment of the roll shell 15 can also be implemented very simply. For example, a distance measuring system 14 can be connected to the pressure cylinder 12 so that the position of the pressure cylinder 12 and thus also the position of the roll shell 1 can be easily adjusted.

Since the compression springs 11 always provide sufficient prestress of the roll shell 1, there is no need for additional control to maintain the tension of the roll shell 1.

As can be seen from Figures 1 and 2, in the embodiment shown, the four compression springs are arranged at 90 ° angles apart. In addition, two hydraulic cylinders 12 are provided which are opposite each other in relation to the shaft 10. The hydraulic cylinders are 45 Q offset relative to the compression springs 11. Of course, the hydraulic cylinders 12 and the compression springs 11 may also be disposed axially 10 in the same line, if space conditions permit 15.

Figure 1 and an enlarged scale of Figure 3 also show that the pressurized cylinders 12 are provided with extensions 15 which prevent the press rings 13 from rotating with respect to the bracket 2, which could lead to the folding of the press springs 12.

20 Figure 4 shows the arrangement according to the invention is shown schematically, which in this embodiment is provided with two compression springs 11, and two pressure medium cylinders 12. These are supported inside the fixed bracket 2 and outwardly from the roll shell support plates 4 of the inner rings 5 Paineainesylintereitä 12 by adjusting the roll shell 1 also moves the double arrow 9 in the direction back and forth with respect to the fixed bracket 2 25.

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Claims (8)

A press roller with a roller sheath (1), which is fixed to support plates (4), rotatably mounted on a stationary carrier (2) and displaceable in axial direction on the carrier (2), wherein the roller sheath (1) can be put under tension by a clamping device (11, 12) which acts on the tensioning discs (4), the clamping device (11, 12) having at least one compression spring (11) which is supported on one side of a support plate (4) and on the other side of the carrier (2). ), and at least one pressurized cylinder (12), characterized in that the pressurized cylinder (12) is designed as a single-acting pressurized cylinder. Pressing roll according to claim 1, characterized in that the pressurizing cylinder (12) is designed as a pneumatic cylinder. Pressing roller according to claim 1, characterized in that the pressurizing cylinder (12) is designed as a hydraulic cylinder. Pressing roller according to any one of claims 1-3, characterized in that a weighing system (14) is assigned to the pressure medium cylinder (12). Pressing roll according to any one of claims 1-3, characterized in that a pressure measuring system is assigned to the pressure medium cylinder (12). Pressing roller according to any of claims 1-5, characterized in that at least two pairs of pressure cylinders (12) and compression springs (11) are provided, which are seen in the axial direction of the roller sheath (1) in a row. Pressing roll according to any one of claims 1-5, characterized in that at least two pairs of pressurizing cylinders (12) and compression springs (11) are provided, and that the "pressurizing cylinders (12) and compression springs (11) are arranged in zigzag with one another. o rfe * © -n- Pressing roller according to any one of claims 1-7, characterized in that the pressurizing cylinders ne (12) and the compression springs (11) actuate with their end pressure rings rfs -j> (13), that the support discs (4) consist of an inner ring (5) and an outer ring (6) which are S connected to each other over rolling bearings (7), and that the pressure rings (13) also affect the inner ring (5) of the carrier (2) sliding on the carrier (2).