FI116150B - Shoe press shoe - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a shoe press shoe for a paper or board machine according to the preamble of claim 1, wherein the shoe has a press surface which is pressed against a counter member, such as a counter roll, to which press pockets are provided.

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In paper machines, compression normally takes place in a press gap, i.e. a press nip between press rolls, whereby the paper web is generally conveyed through a press nip between water-absorbing press felts which pass through the press nip together with the paper web. The length and geometric shape of the press nip 15 significantly influence the pressing result.

A highly effective elongated press nip is provided by a shoe press. The shoe press has a sliding or press shoe having 20 typically concave pressing surfaces. A concave pressing surface is provided against a counter member, such as a counter roll, and an endless belt runs between the slide shoe and the counter roll around the press shoe. The shoe press further comprises a drive for pressing the sliding shoe against the counter roll. A lubricant, such as a lubricating oil, is fed between the slide shoe and the belt by means of a feeding device, and an elastic polyurethane sock that slides over the shoe can be provided on the slide shoe.

»*« · · · V ·: In modern paper and board machines, due to the increase in speed and the increase in press pressure on the shoe press, the press shoe must supply 30 lubricants efficiently to ensure a good lubrication level while controlling the hydrostatic pressure in the nip.

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It is well known in the art to place a plurality of oil pockets on the surface of a shoe to enhance lubricant delivery. It is also known to feed * ··· * 35 different streams into different pockets. It is also known to attach to the front of the shoe a tubular oil inlet duct which is secured to the outside of the shoe and from which oil is introduced into the Oil Pocket.

2 116150 The object of the present invention is to provide a completely new solution for a shoe press shoe.

5 Brief Description of the Invention

The apparatus of the invention is characterized by a combination in which the shoe is formed on the inlet side with at least one transverse media supply channel, from which the at least one passage to the medium is provided for at least one fluid level on the shoe surface.

The apparatus according to the invention is further characterized by what is stated in claims 2 to 8.

The solution according to the invention has several significant advantages. The invention provides a very simple and functional solution for the design of a press shoe. The solution has been able to combine the support of the shoe press-20 tilt adjusting system and the oil supply cover section into a single unit that also allows for lateral support of the shoe from the inlet side of the shoe press.

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BRIEF DESCRIPTION OF THE DRAWINGS! "!: 25 '' The invention will now be described in more detail by way of example.

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with reference to the accompanying drawing, in which:

Figure 1 shows a cross-sectional view of an apparatus according to the invention on the inlet side of a shoe press V 30.

Fig. 2a shows a portion of the cover at the junction between the cover and the shoe in the direction of line IIa-IIa in Fig. 1.

Figure 2b shows a portion of the lid in the direction of line IIb-IIb of Figure 1.

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Figure 3 shows the surface of the shoe at the junction of the shoe with the line III-III of Figure 1.

DETAILED DESCRIPTION OF THE INVENTION 5

Figure 1 is a sectional view of a shoe press. In the figure there is shown a fluid supply channel 32 for the lubricant, such as oil, and a cover 15 for the supply channel 32. The cover 15 has recesses 14 for fastening means 13 securing the cover to the shoe press shoe ίο 1 so that the shoe 1 interface 23 and the cover 15 interface 24.

The cover 15 is provided with channels 30 and threads 31 for external media inlets, such as oil. The cover 15 is typically-15 connected to at least one, preferably flexible, hose assembly 26 or tube by means of an external medium, such as an oil supply system. The lid 15 may be a one or more part piece. The cover 15 has extension holes 12 for fastening means 13 as an extension of the dip machining 14. The cover 15 is locked on the shoe 1 by a spacer 20 of at least one form fitting member 22. The form-fitting member is preferably a wedge-joint.

The cover 15 is located at least partially substantially on the underside 20 of the shoe. At least part of the outer surface 25 of the cover 15 is or may be part of the upper surface 21 of the shoe or an extension thereof.

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The outer surface of the cover 25 corresponds to a response known per se in the literature. 35 and prevents shoe 1 from moving sideways, machine length MD. In the figure, the longitudinal direction of the machine is indicated by the arrow and letters MD and the transverse direction of the machine by the arrow and letters CD.

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The shoe-side surface 24 of the cover has projections 16 projecting into the channel 32 of the shoe 1, which serve as a second support surface for the gasket 17. : Y: The cover 15 is sealed against the shoe 1 by a pressure seal. ·· *; 17. The cover 23 of the shoe 1, which is an essential extension 35 to the surface 20, has a machined space 19 for the seal 17.

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Surface 23 facing shoe 1 has threaded holes 11 for attachment member 13.

Within the shoe 1, the surface 23 has at least one channel 32, which may be continuous or limited by the heels 33. The length of the channel 32 can be determined, for example, according to the zone adjustment. Channel 32 may include communication channels 34. Channel 32 is connected in a fluid communication manner to submersible machining 3. A submersible machining 3 and channel 32 are provided with a fluid transfer component, which in the following is referred to as an engaging member 4. The engaging member 4 is shaped through. The permeability of the material in the attachment member 4 can be varied by replacing part 4, thereby providing the desired bore size, shape, or number of bores 9 of desired size.

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The shoe 1 has at least one, preferably more, attachment point 10 to the attachment member 4.

The pocket 2 on the shoe surface 21 is connected to the channel 5 and its extension 6 20 to the channel 32. The channel 6 includes an attachment point for the nozzle 7, which is usually a replaceable piece. The nozzle 7 is shaped to be permeable to the substance by at least one passageway 8. The shoe surface 21 is preferably provided with pockets 2 and recesses 3 sequentially / parallel.

The pressure and flow ratios of the system can be varied by changing the pressure and flow rate within the duct 32 and by changing the nozzle 7 and: the fastening member 4.

Cover 15 has recesses 28 for adjusting screw 27. Raken-30 can also be used for another oil system only.

»* * · ··; It will be apparent to one skilled in the art that the invention is not limited to the embodiments set forth above, but may be varied within the scope of the appended claims f f. In the Explanatory Memorandum, the following may be used separately, depending on the embodiment, together with: ··· '35 other features.

Claims (8)

A shoe press (1) for a paper or cardboard machine shoe press, said shoe comprising a press surface, said press surface being arranged to abut against a motor member, such as a counter roll, said shoe press surface for improving the media feed with media pockets, characterized of a combination in which the shoe (1) on the inlet side is provided with at least one media feeding channel (32) running in the transverse direction, from which the feeding channel is arranged at least one passage (5, 6, 9) for the medium to at least one media pocket (2, 3) on the surface of the shoe, and where the shoe is provided with a lid part (15) which forms part of the wall of the media feeding channel (32). Shoe according to claim 1, characterized in that the lid part (15) comprises at least one bracket part (29) which can be equipped with tilt control equipment. Shoe according to claim 1 or 2, characterized in that at least one passage is provided with at least one nozzle (4, 8). 20 Shoe according to any of claims 1-3, characterized in that the passage from the media feeding channel to the pocket is provided with at least one replaceable nozzle (4, 8). ·: ··: 25 5. A shoe according to any one of claims 1-4, characterized in that: the lid part (15) and the shoe mold load can be adapted to each other. • · • ♦ A shoe according to any of claims 1-5, characterized in that. the lid portion comprises a support surface (25) for the shoe press motor (35). 30 Shoe according to any of claims 1-6, characterized in that the support surface (25) of the lid part has a curved shape. «T * ·. Shoe according to any one of claims 1-7, characterized in that:: the media feed channel (32) with at least one, preferably flexible tube combination or a tube (26) is coupled to a feed system for an external medium, such as oil. s »·» «·