CN1302219A

CN1302219A - Pulp filter or washer and sealing for use therein

Info

Publication number: CN1302219A
Application number: CN99805951A
Authority: CN
Inventors: J·伊埃诺; H·普荣陶斯
Original assignee: Andritz Oy
Current assignee: Andritz Oy
Priority date: 1998-03-09
Filing date: 1999-03-09
Publication date: 2001-07-04
Also published as: FI990182A0; FI990182A; NO20004529L; NO20004529D0; EP1069934A1; CA2323049A1; NZ506876A; WO1999046025A1; PL342808A1; JP2002506143A

Abstract

The present invention relates to a sealing for use in the sealing of a rotating member the sealing being particularly well suitable for sealing of the large-diameter parts of drums used in large wash and filter cylinders, and shafts, of the wood processing industry. The washer in question comprises a stationary outer shell (10), a wash liquid feed chamber (12) disposed inside the shell, which are defined by a perforated plate (16), and a rotating drum disposed inside said surface (16), the drum having a liquid permeable perforated surface (18) whereby the so-called pulp space (20) is defined between said perforated surface (16, 18), the washer being provided at both of its ends with sealing in order to seal the rotating drum mentioned relative to the stationary outer shell, the sealing being formed by a sealing box (26) and a sealing member disposed therein, and it is a characteristic feature of the washer mentioned that the sealing box (26) has been provided with means for introducing pressure medium, preferably liquid, into the sealing box (26).

Description

Paper pulp filter or washer and used hermetically-sealed construction thereof

The present invention relates to a paper pulp filter or paper pulp washer, and especially relate to a hermetically-sealed construction that is used to seal its rotating member.Sealing for example solved well with the large-scale flushing of wood-processing industry and filter drum in the sealing relevant problem of major diameter part of used drum barrel.Remove the problem that has solved in the drum barrel sealing, also can be advantageously applied to the axle that for example seals other corresponding filter in drum barrel filter, disk filter and the wood-processing industry according to sealing of the present invention.

Some sealing arrangements of the major diameter part that is used for sealing the used drum barrel of large-scale flushing and filter drum have already learned of the matter, its verified its of operation in our used so-called DRUMDISPLACER  washer has some shortcoming and some minor issues, and these defectives and problem often are being left in the basket aspect the use of operation and device itself.United States Patent (USP) discloses a hermetically-sealed construction that is used for above-mentioned DRUMDISPLACER  washer No. 4795170.The sealing structure comprises traditional so-called sealed strip, and these sealed strips were twined for 4 circle or 4 weeks by the drum barrel around washer in a seal.Can realize tensioning sealing part with a known tightening hoop sealing mode vertically of passing through.But a defective of this structure is that the tensioning that is reached in different afterwards sealing rings is inhomogeneous.As friction and friction both axle and seal box between when high of sealing between the rope, the sealing ring can hinder tension; Like this, first sealing of close tightening hoop is compressed and presses against on the axle, and remaining sealing ring of while is compressed rarely and a last sealing ring almost is not compressed.Naturally, this can cause the quick wearing and tearing of the first sealing ring, thereby seal appearance leakage, perhaps owing to sealing leak appears in too lax tensioning.

Another hermetically-sealed construction is disclosed in No. the 66472nd, the Finnish patent communique, and it is based on using known ancient braiding sealing rope.In described solution, the rope of braiding will twine around a sealed central portion, and presses against on the axle at axially mounting and by the ring outside the rope strap that is arranged on braiding by pressure plare.The liquid that brings from an outside pressure source works behind ring.Such one uniform pressure is directed to each Knitted rope ring, and this is opposite with so-called seal box solution, and the tensioning that wherein seals rope strap is axially realizing.But the sealing structure is easy to damage except its positive one side in a word.The pressure that brings from the outside pressure source may be because of some reason, and for example mechanical disruption, dynamic failure etc. and disappear may easily be washed seal open and cause a large amount of leakages and a permanent quilt dashes thereby occupy in the inboard pressure of device.Have been noted that because seal rough, but pointed as its name, it is to be formed by the rope yarn braiding, so fiber passing and little by little piercing through easily between the rope yarn between seal and rotary part, and causing leakage.

A problem relevant with above-mentioned all sealing device is that seal is tending towards beginning rotation with revolving part, and the result reduces leakage efficiency widely.Therefore, the use of various types of sealings and its undesirable fragility that is showed become a sealing difficult problem.Based on the pressure differential that will seal, it is approximately 1 crust, and people are expected to seal easily such position.But, when considering that sealing (part) must remain on the paper pulp of pure liquid and high concentration (about 15%) true in their space, the circumferential speed that wherein rotates drum barrel is the order of magnitude less than 0.5m/s, variations in temperature is between 40 and 100 degree, and the size of drum barrel does not need very accurate, especially after thermal expansion, believe easily that then most seal type can not satisfy this sealing requirement.

One solution of the problems referred to above is disclosed in No. the 912744th, the Finnish patent.This scheme comprises a seal and a projectile, and sealing part and projectile are set in the seal box and with a gripper sleeve and clamp.Seal is arranged in the seal box, thereby it lies low on the surface of a rotation drum barrel.Projectile is supported on the radial outer wall of seal box on the other hand.Seal also has a T shape cross section, thereby the bar of T shape partly is arranged in the groove of corresponding size of projectile.One essential characteristic of seal is that the apparent friction ground between seal and the projectile is higher than the friction between seal and the sealed surface.In scheme, be to guarantee above-mentioned essential characteristic by the inboard that the part with seal is configured in projectile according to this embodiment.Seal is preferably by the plastic material manufacturing, its coefficient of friction low and chemically-resistant and heatproof degree functional.Sealing surfaces preferably is slightly less than the width of projectile at axial width, thereby when projectile (or some projectiles) when compressing with gripper sleeve, is that sleeve or rear wall can not contact with seal.Thereby seal so work when seal or seal to by in the drum barrel indentation sealing case that rotates the time, preferably the projectile by the elastic rubber material manufacturing is compressed in the axial direction, and meanwhile be tending towards expanding diametrically, so that seal is pressed onto on the revolving part tightly.Seal according to the present invention can substitute two braiding sealing cord grommets in simple an application, but can use several seals abreast if necessary.

Preferred further improvement as the foregoing description is worth mentioning an embodiment, and according to this embodiment, projectile is formed by a ring-shaped rubber pipe, and seal is pressed towards the surface of drum barrel by the pressure of introducing the rubber tube inboard.

In such scheme, also have problems.At first, the ring as seal is to be made by special teflon (polytetrafluoroethylene (PTFE)) or corresponding harder relatively plastic material.Secondly, seal can produce a very high power on being pressed against the surface of drum barrel the time, thereby this power is except causing the seal heating its load is increased the weight of and wearing and tearing, the drum barrel surface of also wearing and tearing.The sealing property of result in any situation all reduced.In addition, all above-mentioned encapsulating methods need special sealing water (water seal) configuration, and it brings the water of cleaning to hermetically-sealed construction, increase in hermetically-sealed construction and friction between the sealed surface preventing, and prevent hermetically-sealed construction heating and destruction.A kind of mode be through one independently the liquid inlet come lubrication sealing structure.Some such schemes also need an independently propellant configuration, so that pressure to be provided in projectile, or the liquid of air pressurized or pressurization.

The present invention is by providing a hermetically-sealed construction to attempt to avoid the defective of above-mentioned hermetically-sealed construction, and the sealing structure has the life-span significantly longer than prior art scheme, and its price only is the sub-fraction of prior-art devices.

The distinguishing characteristics of hermetically-sealed construction of the present invention is disclosed in the appended patent claims.

Structure configuration according to the present invention provides for example following advantage that is better than prior art:

● seal can not rotate with drum barrel;

● seal and sealed surface adapt easily;

● the friction coefficient with respect to sealed surface causes a little moment, thereby

Can use higher paper pulp discharge pressure;

Can use higher flushing liquid discharge pressure;

In other words, the paper pulp space can be full of reluctant paper pulp fully, and flushing becomes more effective;

● the price of device is very economical;

● structure is very simple and reliable;

The outside propellant that does not have pressurization;

There is not special pipeline to come to introduce propellant to hermetically-sealed construction;

● need not water seal, perhaps be used for the pipeline of water seal;

● there is not working of plastics (not terminating in the technical process like this) even the seal fracture does not also have plastics;

● temperature fluctuation can not influence the running (not having expansion plastic) of hermetically-sealed construction;

● the set-up time is shorter, because

Two loose elements are only arranged

There is not the sulfuration of rubber

There is not being threaded of T shape part

The connection or the locking hole that do not have water ring

● economic design:

Avoided expensive water ring, T shape part and projectile;

● this structure configuration can be used for all existing washers, the particularly remodeling of DRUMDISPLACER  washer.

When will sealing device according to the present invention being used to seal the axle of washer or disk, cylinder or corresponding filter, some above-mentioned advantages have also been reached at least.Like this, according to hermetically-sealed construction of the present invention both as the hermetically-sealed construction of the filter element of washer or filter, also as their hermetically-sealed construction of axle.

Some preferred embodiments of the hermetically-sealed construction according to the present invention are described with reference to the accompanying drawings, among the figure:

Fig. 1 represents a preferred embodiment of the hermetically-sealed construction according to the present invention;

Fig. 2 represents another preferred embodiment of the hermetically-sealed construction according to the present invention;

Fig. 3 represents the 3rd preferred embodiment of the hermetically-sealed construction according to the present invention;

Fig. 4 represents the 4th preferred embodiment of the hermetically-sealed construction according to the present invention.

Figure l represents an end of a so-called DRUMDISPLACER  washer, broken section.Described washer comprises, with regard to the element that can see among the figure, one fixing shell 10, is arranged on the flushing liquid conveyor chamber 12, its end loops 14 of housing inboard and the perforated plate 16 of fixing general cylindrical shape, and this perforated plate is limited to the wall place by axle with washer.

This washer comprises that also one is arranged on the flushing cylinder of described perforated plate 16 inboard a distance, and the diameter of this cylinder is the order of magnitude of 3～5m, and length is 3～10m, and the surface of cylinder correspondingly is formed with the perforated plate 18 of a general cylindrical shape.Between the drum barrel plate 18 of perforated plate 16 that limits flushing liquid conveyor chamber 12 and perforation, have a space 20, the most handy axial partition wall (not shown) in this space is separated into some chambers, carries the fibrous suspension that will wash in these chambers.The end cylinder 22 of described space by drum barrel is limited on drum barrel distolateral, and this drum barrel clearly extends to 20 outsides, space in the axial direction.One so-called filter chamber 24 is positioned at the inboard of the perforated plate 18 of drum barrel.Washer also comprises the sealing device that is used for drum barrel, the sealing device comprise a seal box 26 its by the end loops 14 of conveyor chamber 12 or one corresponding, one has the seal box outer shroud 28 of a surperficial 28S that will seal, one corresponding piece 30 limits jointly with having the drum end cylinder 22 of wanting sealing surface 22S and being arranged on the interior seal of case.In this embodiment, hermetically-sealed construction comprises a base ring 32, and it can be by the metal manufacturing, and for example steel or for example solid rubber, this base ring are resisted against on the corresponding piece 30; With a sealing lip 34, it is arranged on the described ring.In the function of the seal box 26 of DRUMDISPLACER  washer end is paper pulp space 20 with respect to the outer side seal pressurization of washer.In other words, its objective is and prevent that paper pulp and the used flushing liquid of flushing paper pulp from spilling through the end of washer.

According to a preferred embodiment of the invention, realize this purpose by in seal box 26, using a sealing lip 34, thereby pressure medium is brought to the pressure side of seal box 26, promptly opens wide a side of leading to paper pulp space 20, and this medium is expressed to sealing lip 34 on the sealed surperficial 22S and 28S.Described medium preferably is used to wash the liquid of paper pulp.Pressure medium is introduced in the seal box with the pressure a little more than the pressure in the space 20, thereby produces in the slit 36 between end loops 14 and end cylinder 22 from seal box 26 flowing in paper pulp space 20.This guarantees that fiber can not enter in the seal box 26 from paper pulp space 20 through slit 36.The hermetically-sealed construction that an essential characteristic of the present invention is the drum barrel end is to lead to the mobile of paper pulp space and provide by spreading to be set to produce from seal box or related device at the liquid in the slit 36 between end loops 14 and the end cylinder 22.This is to realize by liquid is introduced in the seal box with a pressure that is higher than the interior pressure in paper pulp space 20.In addition, the volume of the slit of flowing through liquid in 20 to the paper pulp space can be controlled by suitably regulating slit 36, considers that particularly pressure or the pressure differential in seal box and the paper pulp space regulated.

Fig. 1 represents also how flushing liquid W1 is introduced in the conveyor chamber 12 through a pipeline 38.Pipeline 38 is provided with a branch 40, and this branch brings in the seal box 26 flushing liquid as pressure medium.This branch preferably is provided with a booster pump 42, to guarantee the pressure differential between conveyor chamber 12 and the seal box 26.Sealing lip 34 for example is fixed on the base ring 32 or through it by screw or corresponding device thereof and is fixed on the corresponding piece 30.

Fig. 2 represents a hermetically-sealed construction of another preferred embodiment according to the present invention, wherein corresponding piece 30 usefulness one O shape circle 50 is sealed with respect to surperficial 28S, and wherein to be fixed on the surface of the corresponding piece 30 of seal box 26 (be to pass through screw to an one-sided sealing lip 54 in the embodiment shown, though also can adopt other fixture), wherein the lip of sealing lip is set on the sealed surperficial 22S.Seal with O ring is lived the seal box 26 between

element

28 and 30 in this case, and wherein

element

28 and 30 is relative static each other, and sealing lip 54 is sealed between the end cylinder 22 of fixing corresponding piece 30 and rotation drum barrel.At least above-mentioned design also can be worked like this in the time of in pressure medium is introduced into seal box 26 as shown in Figure 1, and this is fully possible.But embodiment shown in Figure 2 finishes by an adapter ring 56 is provided, and this adapter ring preferably is fixed by bolts in the seal box 26 and at end loops 14 places towards paper pulp space 20 sides, to be sealed in the slit 36 between end loops 14 and the end cylinder 22.The effect of described adapter ring 56 mainly is with the liquid stream to the paper pulp space is adjusted to suitable value from seal box or corresponding space, secondly is to prevent that fiber from entering in the seal box 26 from paper pulp space 20.Use the feasible concrete property that can consider each washer of adapter ring.For example, various pressure differentials between paper pulp space and seal box, it influences flowing in the slit between adapter ring and end cylinder significantly, preferably controlled by regulating described slit, wherein the adjusting in slit is to be undertaken by for example adapter ring of different sizes, certainly adapter rings of these different sizes must not with the size interference of mechanical device, for example end loops 14 of washer.In this embodiment, also be provided with a nozzle 58, its opening is in slit 36 and with the drum barrel rotation, and the water of flushing sprays to slit 36 with a high relatively pressure through this nozzle, to go out the fiber that may enter in the slit.The design of nozzle 58 is preferably such, and the flushing water of its guiding one rotation sprays to slit 36 in, and the current of Pen Sheing also will float regional interior fiber between nozzle 58 and the

adapter ring

56 and 36 go out from the slit thus.

Fig. 3 represents the hermetically-sealed construction of one the 3rd embodiment according to the present invention, and wherein corresponding piece 30 usefulness one O shape circle 50 is sealed with respect to surperficial 28S, just as in the previous embodiment.In this embodiment, these one-sided sealing lip 64 the most handy bolts are fixed on the end cylinder 22, and promptly sealing lip 64 is fixed on the rotary part.The lip of sealing lip 64 be resisted against corresponding piece 30 on the surperficial 30S of seal box 26.If desired, though optional, and as shown in Figure 3, a wear ring 66 can be set, and the material of wear ring can have than the better antiwear characteristic of the material of corresponding piece 30 in the surperficial 30S of corresponding piece 30.Ring 66 also can be replaced, thereby two elements keeping sealing are all easily with new changing, to such an extent as to for example in the process of abnormal operation condition or owing to work as the material seal surface that is worn during wrong operation and fly under the situation in the seal box.Other embodiments of the invention can be used a special wearing face with a corresponding mode too, and this wearing face contacts with the lip of sealing lip and has than better sliding properties of base material or antiwear characteristic.Wear ring or wearing face certainly substitute by handling base material, thereby improve its wear-resisting or sliding properties.Fig. 3 also represents how a pressure medium pipeline 40 is connected on the seal box 26, and as shown in Fig. 1, sealing lip 64 is pressed against on the surperficial 30S or wear ring 66 of corresponding piece 30 thus.This figure also represents the adapter ring 56 as Fig. 2, though can save this adapter ring, and also available mode shown in Figure 1 suitably is configured in the liquid stream between seal box and the paper pulp space.But in the pressure of the pressure medium of the liquid in preferably being introduced into seal box 26 situation identical with pressure in the paper pulp space, it will be suitable using adapter ring 56.

Fig. 4 represents an embodiment more of the present invention, and wherein the flushing in the slit 36 between end ring 14 and end cylinder 22 is disposed in the mode different slightly with the foregoing description.In fact seal box 26 sealings own can use any method setting in the foregoing description, and perhaps using in fact, any way in protection domain of the present invention is provided with; Like this, in Fig. 4, for example used the encapsulating method shown in Fig. 2.In this embodiment, preferably liquid and the pressure medium that is more preferably the paper pulp flushing liquid are introduced in the seal box 26 through two routes.Described in the aforementioned embodiment so-called sealing water (water seal) is introduced into and is used for the lip of sealing lip 54 is pressed against on the sealed surperficial 22S through conduit 40.In this embodiment, have a next door 72 that is arranged in the seal box 26, this next door limits a space 74 in the end near paper pulp space 20 of seal box 26.One irrigating catheter 76 or in the mode shown in scheming through the next door 72 and guide in the space 74, perhaps directly in outer shroud 28 enters space 74.Next door 72 reaches sealed at the periphery place of seal box 26 with respect to seal box at its two ends.The next door preferably is fixed on the outer shroud 28, and for example a rubber washer 78 seals next door 72 with respect to surperficial 28S simultaneously.The inward flange in next door 72 is by a lip 80 sealings that drag along surperficial 22S.The target of embodiment shown in the figure is to set up such condition in seal box 26 and space 74: do not need the cleaning device shown in the earlier figures, slit 36 can keep clean.This design is to introduce liquid with a pressure that is higher than existing pressure in the paper pulp space 20 in space 74.Then the liquid flow in slit 36 just takes place from seal box 26 flowing to paper pulp space 20.Liquid is introduced in another section of seal box 26 through conduit 40 with a lower pressure, but this force value should correctly be set, the condition of its pursuit is, some liquid also flow into below lip 80 in the process in slit 36 according to the injector principle, the sealing that can make liquid set up a good lubrication at lip 80 places, and itself sentence an elevated pressure and guarantee a sealing a little at sealing lip 54.

As the spendable material of sealing lip is EPDM rubber and other corresponding elastomeric material.Described hermetically-sealed construction and the base ring that may use with it are unified as far as possible.In other words, this structure should have the least possible junction.Because to the processing of hermetically-sealed construction, tested a solution, wherein hermetically-sealed construction comprises the band of two equal length; The junction is located in the opposite sides of drum barrel circumference like this.

As above-mentioned, hermetically-sealed construction according to the present invention is except the sealing of the filter element that can be used in the drum barrel washer, promptly outside the sealing of the end on drum barrel washer surface, can also be used for the sealing of the axle of drum barrel for example or disk filter.

And in these application of great majority, the object that seal is to have major diameter, a common object greater than 500mm, and it has a low relatively pressure with respect to fibrous suspension.The application of the foregoing description can be revised, and with the seal as axle, its mode is that the rotation drum barrel with present embodiment is replaced with the rotating shaft in the described filter.

Except above-mentioned example, filter or washer also can for example be disk filters, and it comprises the disk with screen surface or porous surface, and these disks are set up in parallel on a trunnion axis.The axle that has disk is loaded in the drum, thereby fibrous suspension to be filtered or other suspension are covering disk near the axle place at least in the drum.In some cases, suspension even one highly locate to have covered disk what be higher than axle.

And the drum barrel filter can be and the same type of above-mentioned drum barrel washer, but structure of filter can be simplified significantly.Its simplest mode is, a drum barrel filter is formed by a screen surface, and this screen surface is fixed on the trunnion axis in its end; Perhaps the cylinder by a perforation forms, and this cylinder is arranged in the drum, accommodates fibrous suspension or some other suspension that will filter in this drum.

In disk filter and drum barrel filter, filter element, promptly in most of situations, comprise the disk or the drum barrel of adjacent segment, be supported on the drum end through axle, thereby axle is installed in the end that passes to drum on the bearing, and also with respect to the sealing of the end of drum.In great majority were used, washer was under the normal pressure (atmospheric pressure), thereby acted on the hydrostatic pressure that pressure on the hermetically-sealed construction only derives from suspension.In other words, the fluid pressure that is used for hermetically-sealed construction needn't be high more a lot of than atmospheric pressure, and can prevent that still suspension from flowing in the seal cavity.

Fig. 5 represents an axle sealing structure according to a preferred embodiment of the invention.Identical among the figure in used reference number part and the prior figures.Reference number 28 refers to the outer shroud of a seal box 26, has the corresponding piece 30 by an O-ring seals 50 sealings in its (26) inboard.The whirligig that will seal is that axle is represented with reference number 82 in this embodiment.Different with in the previous embodiment, seal 84 between corresponding piece 30 and end ring 14 and 86 usefulness, one separator 88 are separated from each other, wherein separator 88 be with so-called braided packing in so-called water ring be same type.In other words, separator 88 is a ring, and it has at least at an inlet at conduit 40 places, is used for carrying in seal box 26 seal fluid.In addition, different with embodiment in the earlier figures, have sealing ring 84 with two lips.Other parts and function for all, the hermetically-sealed construction shown in Fig. 5 is corresponding to disclosed content in Fig. 1～4.

By foregoing description as can be seen, proposed a novel sealing device, it can be in by the protection domain that appended Patent right requirement limited, even departed from above-mentioned variant embodiment significantly.Obviously, the variant embodiment that only proposes the as an example above respective application of having reserved other is therefrom selected for the user.For example, the rotary drum hermetically-sealed construction can be other type rather than sealing lip; It is very suitable using traditional O-ring seals in some cases.Therefore, the solution that is included in all sealing devices defined in first Patent right requirement all is included within protection scope of the present invention.In addition, also be highly suitable for during this outer class of wood-processing industry uses according to approach of the present invention, promptly it is medium-and-large-sized, preferably columnar surface moves relative to one another, thereby must seal relative to one another.

Claims

1. a filter or washer, comprise that mainly one is arranged on the filter element on the trunnion axis, with a bulk container, wherein said axle is installed on the interior bearing of this bulk container, and filter or washer are provided with a hermetically-sealed construction at its two ends, to seal described filter element, described axle or both, thereby prevent that the material that will filter from leaking into the outside of device, the sealing structure is formed by a seal box (26) and a seal that sets within it, and it is characterized in that: described seal box (26) is provided with the device (40) that brings the pressure medium of preferably liquid in seal box (26).

2. filter as claimed in claim 1 or washer is characterized in that: described seal is a sealing lip (35,54,64).

3. as the filter or the washer of claim 1 or 2, it is characterized in that: described medium is to be used to wash the water W1 of the material that will handle or the filtrate of recovery.

4. as the filter or the washer of claim l or 2, it is characterized in that: the pressure ratio of described pressure medium is held the interior pressure height in space (20) of the material that will handle.

As claim 1 or filter or washer, it is characterized in that: seal box (26) is separated into two chambeies by a next door (72), and pressure medium is brought in these two chambeies.

6. filter as claimed in claim 5 or washer, it is characterized in that: described next door (72) are sealed in two edge, and promptly the two is sealed on the surface of the surface (22S) of its outer shroud with respect to seal box (26) (28) and filter element end cylinder (22) or axle.

7. filter as claimed in claim 5 or washer is characterized in that: the pressure medium in seal box (26) in the space that holds the material that will handle (being space 74) that part of is than the pressure height in the space that holds the material that will handle.

8. filter as claimed in claim 2 or washer, it is characterized in that: seal box (26) is limited by the end cylinder (22) of the filter element of the outer shroud (28) of the end ring (14) of conveyor chamber (12), seal box, rotation or axle and corresponding piece (30), and described sealing lip (64) is fixed on the end cylinder (22) or axle of rotating filter element.

9. filter as claimed in claim 8 or washer, it is characterized in that: the corresponding piece (30) of seal box (26) is provided with a ring (66) at the lip of sealing lip (64), perhaps it abuts to lip surperficial processed of sealing lip (64), to improve its wear-resisting and/or sliding properties.

10. filter as claimed in claim 2 or washer, it is characterized in that: seal box (26) is limited by the end cylinder (22) of the outer shroud (28) of the end ring (14) of conveyor chamber (12), seal box, rotating filter element or axle and corresponding piece (30), and described sealing lip (34,54) is fixed on the corresponding piece (30).

11. filter as claimed in claim 2 or washer, it is characterized in that: seal box (26) is limited by the end cylinder (22) of the outer shroud (28) of the end ring (14) of conveyor chamber (12), seal box, rotating filter element or axle and corresponding piece (30), and described sealing lip (34,54) is fixed on the corresponding piece (30) through a base ring (32).

12. filter or washer as claim 10 or 11 is characterized in that: the surface of surface of the end cylinder (22) of rotating filter element (22S) or axle is provided with a ring at the lip place of sealing lip (34,54).

13. filter or washer as claim l or 2, it is characterized in that: seal box (26) is limited by an end ring (14) at its that place, end towards the space that holds the material that will handle (20), ring (56) is fixed on this end ring in the middle of one, be controlled at seal box (26) with the space (20) that holds the material that will handle between mobile in the slit.

14. one is used to seal the hermetically-sealed construction of a surface of revolution, preferably seal the drum barrel of a fibrous suspension drum barrel washer or a drum barrel filter, perhaps seal the axle of a disk filter or a drum barrel filter or a drum barrel washer, the sealing structure is set in place in the cylindrical tubular member (22) of rotation and in the seal box (26) between this cylindrical tubular member or its a part of shell, it is characterized in that: described hermetically-sealed construction is a sealing lip (54).

15. the hermetically-sealed construction as claim 14 is characterized in that: described sealing lip (34,54,64) is fixed on the seal box (26).

16. the hermetically-sealed construction as claim 14 is characterized in that: described sealing lip (64) is fixed on the cylindrical tubular member (22) of rotation.

17. the hermetically-sealed construction as claim 14 is characterized in that: towards the surface of the lip of described sealing lip (34,54,64) or processed, special wear ring or surface (66) are set in described surface perhaps to improve its slip and/or antiwear characteristic.