Scraper with water lubricating performance

Abstract

The invention relates to a cleaning device (10), which is used to clean the surface (102) of a roller (100) that rotates in a machine that is used to cleanly produce a fibrous web, in particular, a paper web, a paperboard wed, or a cotton web. The cleaning device comprises a scraper blade (12) that points to the surface (102) of the rotating roller (100) and a lubricant applying device (18). Alonga direction that is opposite to the rotation direction (R) of the rotating roller (100), the lubricant applying device applies a lubricant on the surface (102) of the rotating roller (100) at a peripheral position that is in front of the scraper blade (12). The lubricant applying device (18) comprises an elongated nozzle silt (24); and the nozzle silt basically extends in the whole length of thescraper blade (12) and is arranged as the end, which is directly adjacent to the scraper blade (12), of the surface (102) of the rotating roller (100).

Description

technical field [0001] The invention relates to a cleaning device for cleaning the surface of a rotating roll in a machine for producing a fibrous web, especially a paper, board or tissue web, said cleaning device comprising a doctor blade directed towards the surface of the rotating roll and a lubricant applying device for applying lubricant to the surface of the rotating roller at a peripheral position located forward with respect to the scraper blade in the direction of rotation of the counter-rotating roller. Background technique [0002] Such cleaning devices have been known for a long time from the prior art. figure 2 A schematic illustration of this known cleaning device 10 ′ is shown, not to scale. The cleaning device 10' serves to clean the surface 102' of the roll 100' as it is usually used in machines for producing fibrous webs. The roll 100' may for example be a wire guide roll in the wet end or forming section of a paper machine. Here, the clothing 200' of th...

AI Technical Summary

Problems solved by technology

However, providing such a large volume of clear filtrate is complex and cumbersome and requires, inter alia, a correspondingly high pumping power and filter capacity

In addition, when using the low-pressure injection pipe 20', it is inevitable to generate a large amount of mist, which in turn causes pollution in other places in the machine.

Another problem relates to the low pressure injection pipe 20' being easily blocked, thereby increasing the maintenance cost

While ceramic rollers can be successfully operated without the use of low pressure injection pipes, such rollers are very expensive to purchase

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