DE2038059A1 - Device for cleaning open-end spinning devices - Google Patents

Description

Patent attorney Stuttgart, July 30, 1970

DIPL-ING. F. ROSES «,, ,,,

DIL-ING. HH WILHELM Dr-W / b 203 8 05 9

7000 Stuttgart-1
Gymnawumstr. 311 tfW29fl33

Re: Patent and utility model auxiliary application D 3876

Note: Spindle factory Süßen

Schurr, Stahlecker and Grill GmbH

7354 Süßen / Württ.

Device for cleaning open end spinning

facilities

The invention relates to a device for cleaning open-end spinning devices

Devices are known with which the turbine of an open-end spinning device can be cleaned. The operation of the spinning ([ facility to be interrupted. Cleaning the turbine is generally sufficient if the fiber material to be processed has already been cleaned to a certain extent beforehand. However, if the fiber material to be processed has severe contamination, in particular shells and nits, 30 results in an unsatisfactory workflow, since frequent interruptions in operation have to be made to clean the turbine.

The invention is based on the object of creating a device through which the

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the spinning turbine fed and dissolved fiber material can be "freed from impurities".

The invention "is that in the realm of scope the opening roller is arranged at least one cleaning chamber with one or more close to the roller set sufficient cleaning agents. Through this device can be resolved from the Remove fiber material impurities before it enters the turbine, so that even if it is heavily soiled Fiber material necessary for cleaning the turbine Business interruptions do not become too numerous. This takes advantage of the fact that the centrifugal force with high-speed opening roller removes the coarser contaminants how shells and nits are thrown into the cleaning chamber. The cleaning chamber is in usually arranged on the circumferential curve of the opening roller which the fibers are guided, i.e. viewed in the running direction between the feed device and the discharge channel But it is also possible to have the cleaning chamber opposite the circumferential bend leading from the discharge channel to the feed device to arrange. In both cases, impurities and fluff are covered by the cleaning, but with different ones Yield depending on the choice of cleaning agent and its setting,,

In the simplest embodiment of the invention, the additional cleaning agent consists of at least one: Grate bar. In order to be able to make an adjustment to the quality of the fiber material to be processed, it is Useful if at least one grate bar is available for itself <~ is pivotable. This is the distance of the cleaning agent from the opening roller and with a corresponding design of the cleaning agent, for example with a wedge-shaped tip, also changed its angle of attack to the fiber direction and thus the cleaning effect.

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In a further embodiment of the invention there is the cleaning agent from at least one grate sieve · TJm "at ■ this embodiment of the invention only individual points To bring it close to the roller set of the opening roller, it is useful »if the grate screen is toothed.

In a further embodiment of the invention there is the cleaning agent consists of a rotatable roller grate with at least two grate bars structurally simple way very good adjustment possibilities.

In order to graduate the cleaning effect over the circumference of the opening roller, it is provided in a further embodiment of the invention that the cleaning agent consists of several grate bars of different heights. ^;

It can be useful when the detergent is off a combination of grate bars and grate sieves. With this embodiment of the finding, a Achieve a special effect, as the effects of the grate bars and the grate sieves are combined.

In a further embodiment of the invention it is provided that several cleaning agents are arranged on a common holder. This embodiment offers structural, operational and economic advantages.

It is particularly advantageous if the structural unit consisting of one or more cleaning agents and holders can be inserted as a whole from the side in the cleaning chamber. One obtains the advantage that the cleaning agent (s) can be exchanged for others, with through Changing the spacing or changing the shape is the adaptation for the respective fiber material to be processed can be done easily. -

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A structurally simple embodiment of the invention is obtained if the holder for the cleaning agent is designed as a lateral support rail. This is the input and Removing the detergent makes it easier that may be required to remove the detergent and the cleaning chamber to be able to check and, if necessary, to clean, or to replace the cleaning agent if a different one Adjustment of the cleaning agent to the fiber material required will. In order to cover the cleaning chamber laterally in a space-saving manner and to close it tightly, it is advantageous if the holder for the cleaning agent is designed as a side plate.

TJm make a different setting without replacing the holder to be able to, is provided in a further embodiment of the invention that as a lateral! support rail or Side plate trained holder is pivotable and / or slidably arranged on the roller housing * In addition, let These pivoting or displacements can be used to achieve special effects by adding the individual cleaning agents at various radial distances from the roller set and also at tangential distances from the walls the cleaning chamber can be set *

In a further embodiment of the invention that is Detergent can be pivoted around the oil axis of the opening roller arranged. This embodiment allows adjustment the cleaning agent with respect to the feeding device and with respect to the walls of the cleaning chamber without any change the radial distances. TYes To avoid setting errors and the associated malfunctions, it is advantageous to if the operating position of the cleaning agent resulting from pivoting or displacement of the holder, in particular their distance from the Valjsejigaimitur * i by special Adjustment means. Precisely set and preferably

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can be read on scales. With this embodiment of the invention it is possible in an advantageous manner that a (round scale for the operating position of the cleaning agent is fixed by the manufacturer of the entire spinning device by fixed stops and that in the spinning mill desired settings can be made by teaching, which build on the basic setting.

In order to store the detergents safely and precisely and to protect them from overuse, and to ensure a good seal To get the cleaning agents in the housing, it is useful if the cleaning agents and / or parts of their Bracket protrude into recesses that are attached to the actual Bracket receiving housing wall and / or are arranged on the opposite housing wall.

A structurally expedient embodiment of the invention is obtained when the cleaning agent and its holder are one piece forms, such shapes can be made of plastic, for example manufacture precisely and economically.

In a further embodiment of the invention it is provided that the fastening of the cleaning agent together with the holder in the housing takes place by resilient means. This training, in which a clip effect or a pressure spring are used, körineri ⁵ , - 'allows an extremely quick and convenient removal and ¹ ' exchange of the cleaning agent and the holder.

Since disclosure oind-üpinneinrichtungen for various fiber materials, particularly for synthetic fiber materials are to be used, it ^is advantageous that the removable Keinigungsmittel is wholly or partially replaced by a JJ'üllstüok in a further embodiment of the invention that the iteinigungskammer completely or partially fills out. Yes, such a J ¹ UIlStUOk is

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if very clean or even jjaser material, For example, synthetic fiber material is processed and pre-cleaning in the area of the opening roller is not necessary is. If the filling piece does not completely fill the cleaning chamber, the filling piece itself can be used as a cleaning agent act that influences the nullification effect in such a way that that the position of the cleaning chamber is changed with respect to the circumference of the opening roller, for economical production it can be useful if the cleaning agents and / or their holders are made entirely or partially of elastic There are plastic and are held with these elastic parts self-locking in the housing. ± Any such embodiment the invention, additional holding means and corresponding machining of the housing are saved.

The cleaning chamber can be emptied manually, in particular if a fully automatic operation is to be provided, in a further embodiment of the invention provided that the cleaning chamber is connected to a suction channel. This ensures that the cleaning chamber is constantly emptied of the impurities collected in it during operation. Also can be provided that the cleaning agent designed as a rotatable roller grate is rotated by an air stream. This enables particularly adaptable cleaning achieve·

The roller grate can be driven by an independent air flow or by air flows from others Parts of the spinning unit, for example the turbine, are generated, structurally and operationally favorable Suction occurs when the cleaning chamber is connected to a suction channel in the roller housing to which an im Turbine housing arranged suction channel connects. Me Connection is then made when closing. of the hour of the clock aggregate an open Jünd spinning device produced «,

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In the drawing, the invention is shown in several embodiments, for example, i) s show:

Fig.1 is a side view of an inventive Device with the feed part of an open-ended spinning device,

Fig.1a and Tb modifications of the cleaning device according to Ji'ig.1,

Pig.2 is a top view of part of the device according to Fig.t on a larger scale.

Fig.3 is a side view of a detail of the Fig. 1 on a larger scale,

4 shows a further embodiment of an inventive Contraption,

jj'ig.5 a detail of the device. Pig. 4 on a larger scale,

Pig.6 a 'partial representation of a further invention Contraption,

7 shows a side view of a further according to the invention Contraption,

8 shows a partial section through another according to the invention Embodiment,

9 shows a partial section through a further training a device according to the invention,

Fig. 10 is a side view of a further according to the invention Contraption,

fig.11 a plan view of dip device according to Pig.10,

I ¹ Ig. 12 is a plan view of a detail of Pig. 10,

Fig. 13 is a plan view of a further embodiment of a detail similar to cig. 12,

jrig.14 is a rare view of a further inventive Contraption,

FIG. 15 is a plan view of the device according to FIG. 14,

Fig. 16 is a sectional side view of a pre- 209808/1654.

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direction similar, ü'ig.14 and

17 is a side view of a further embodiment a device according to the invention.

In Fig.1, the fiber material to be processed is in direction of the arrow 1 via an inlet funnel 2 from the delivery roller 3 and 4 pressure plate supplied to existing feeder. Me dining establishment specifies the fiber optic material an opening roller 5 provided with a gear set 10 further, from which it is passed through a channel 6 of its housing 7 to a turbine that is not shown.

In the area of the circumference of the opening roller 5 »located between the delivery roller 3 and the channel 6, a cleaning chamber 8 is arranged in the housing 7 when viewed in the running direction As shown in FIGS. 2 and 3, the cleaning means 9 consist of a support rail 11 which carries four grate bars 12, 13, 14 and I5. The support rail 11 serving as a holder forms with the grate bars 12, 13, 14 and 15 a structural unit which can be inserted from the side into openings in the housing wall 7a. In this exemplary embodiment, the support rail 11 is held in its position by a pivotable leaf spring 16 which is held on the housing 7 with a screw 17. The mounting rail 11 is provided with pin-shaped projections 18 which engage in corresponding recesses of the housing 7 for centering purposes, if the clip pins 19 shown in dash-dotted lines ^{in i l ig.1 are arranged in place of the pins 18, which are designed in the manner of a push button, so can} the leaf spring 16 is omitted. To remove the cleaning agent 9, the leaf spring 16 is pivoted about the screw 17.

The grate bars 12, 13, H * and 15 of the illustrated embodiment of the invention have a triangular shape

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Cross-section, with the tips pointing towards the roller set 10. As Ji'ig.3 shows, the individual food bars have 12, 13, 14 and 15 have a different height, which is reduced in the direction of rotation of the opening roller 5, whereby the Grate bar 12 closest and food bar 15 farthest away to the roller set 10 of the opening roller 5 is arranged. The different levels of food can also be reversed or be arranged in a mixed sequence, so that cleaning means 9 can be configured as a structural unit easily removed from the cleaning chamber 8 and through a differently designed detergents are replaced. Jüs is also possible, instead of the cleaning agent 9 in the cleaning chamber 8, an arcuate filler piece 9a or 9b to use the appropriate cross-section, which completely or partially fills the cleaning chamber in order to completely or partially out of puncture, see Ji'ig.ia and 1b. uas.! filler piece 9b forms one piece with a grate bar 9c, For example, ides can be used for processing synthetic Fiber material be appropriate.

It is also possible to use the cleaning agent 9 Manufacture unit made of elastic plastic and instead of the otlfte 18 and the leaf spring 16 or the clip pins 19 the holding of the cleaning agent only by clamping its elastic parts to the housing 7 or, respectively Make walls 7a or 7b.

As shown in dashed lines in Ji'ig.2, the grate bars 12, 13, 14 and 15 can be made so long that they _{engage in recesses 7b 1 of} the housing wall 7b, which is opposite the housing wall 7a holding the support rail 11.

In a manner not shown, the cleaning chamber 8 can be connected to a larger chamber located in the housing J or arranged in its vicinity, which is emptied by hand or mechanically or continuously by suction at certain times.

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With the in i! 'Ig.4 partially shown in a side view The fiber material is fed from the feed roller 21, the opening roller 23 and fed from this via the channel 26 arranged in the housing 25 to a spinning turbine 24. Between the feed roller 21 and the channel 26, a cleaning chamber 27 is arranged, which with a close to the roller set 28 of the opening roller 23 reaching cleaning agent 29 is provided. , uas cleaning agent 29 from a support rail 30 and four grate bars 31, 32, 33 and 34, which form a structural unit with the support rail 30 (see ü'ig.5). That as well as the embodiment according to the ü'ig.1 to 3 cleaning means 29 of comb-like design arranged such that the distances between the tips of the grate bars 31, 32, 33 and 34 to the roller set are adjusted can. For this purpose, the support rail 30 can be pivoted laterally on the housing 25 about a bolt 35, while the other Jünde by means of a locking screw 36 on the side wall of the housing 25 can be clamped. The support rail 30 is widened in the area of the screw 36 Part 37 is provided which has a slot 38 for the screw 36. The support rail 30 also has an arrow-like shape jaide 39, the one attached to the wall of the housing 25 Opposite scale 40. An adjusting screw 41 is also attached to the wall of the housing 25, by a basic setting, preferably in the manufacturer's factory the support rail 30 and thus the cleaning agent 29 is made. The adjustment then takes place in the spinning mill of the cleaning means 29 using spacer gauges between the adjusting screw 41 and the Support rail 30 can be inserted, wherein the set value can be read on the scale 40.

The cleaning chamber 27 is provided with a suction opening 42 through which the removed from the fiber material Impurities can be sucked off continuously.

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in Pig * 6 is shown a detergent 43 which has five Has grate bars 44. In this embodiment, the host rods 44 are also carried by a support rail 45, However, it is not pivotable, but rather radially to the opening roller 23 are displaceable. ΗίβΓζμ is the mounting rail 45 provided with two longitudinal slits 46 and 47 at their junction, which are penetrated by screws 48 and 49 which are screwed into the wall of the housing 25. The mounting rail forms with the grate bars 44 also in this embodiment an exchangeable structural unit that can be seen from the side is used. On the G-housing (not shown) is a Adjustment plate 50 fastened by means of screws 51. The one in that Factory set basic position of the adjustment plate 50 is secured by means of two pins 52. The reference edge 53 of the adjustment plate 50 is an edge 54 of the support rail 45 opposite. The height of the cleaning agent 43 is set in the factory with an adjusting gauge. When changing the height setting in the spinning mill between the reference edge 53 and the reference edge 54, a dash-dotted line is marked according to its height Distance gauge 55a shown inserted. Then the screws 48 and 49 are tightened. A preset or a control can be attached to the side wall of the housing 25 with the aid of a between the reference edges 53 and 54 Scale 55 can be made. The distance gauge 55a can take place parallel stop surfaces 55b, 55c also have slightly inclined stop surfaces, whereby% uch a certain Set inclination of the cleaning device can be.

In the embodiment according to Pig.7, the delivery roller pair leads 57 the fiber material to an opening roller 58. The opening roller 58 is surrounded by a housing 59 which has a cleaning chamber 6u. In this cleaning chamber 6ü fyost rods 61 with blunt opeats protrude from the side in. The grate bars 61 form a structural unit with a

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serving as a holder plate 63, which is about the axis 64 of the Opening roller 58 is pivotably arranged. The lower end of the plate 63 is attached to the housing by a screw 65 clamped, which penetrates the plate öj ^ in ^ e-in ^ m-öchlitz 66, . In this embodiment of the invention, the Food bars 61 of the cleaning agent in the circumferential direction Opening roller - v ^ r ^^^ llt - we? D'efi ~ r ™ whereby depending on ^ foreign ^ zuw ^ exaj ^ beitenden fiber material, the setting made in this way can be that the cost bars' 61 closer to the delivery roller pair 57 or further away from it.

In addition, the distance between the ^ Rbststetten 'δϊ ^ ζΐΓΊΙβηΓ'

End faces 6üa, 60b of the cleaning chamber 60 changed, which affects the cleaning effect. This ¹ cleaning effect can that is used in the cleaning chamber 6ü additionally be changed by a dot-dash line shown filler 67, üei this embodiment, both consisting of the food bars 61 and from the plate 63 detergents can as well as the filler piece 67 against differently sized or designed Parts are exchanged, the pivot position of the cleaning agent can also be read or adjusted here from a scale 59a.

In the embodiment according to FIG. 8, in the housing 69 surrounding an opening roller 68, a cleaning chamber 70 is provided in the area of the circumference of the opening roller 68, into which two knife-like grate bars 71 are inserted. The cutting edges of these grate bars 71 are slightly inclined against the direction of rotation of the opening roller 68. The grate bars 71 are pushed onto profiled guide pins 73 mounted on the housing and are thereby connected to the latter in a rotationally fixed manner. By turning the guide pins 73, different positions of the grate bars can be set. It is also possible to work with one or both grate bars 71, depending on the fiber material present. The cleaning chamber 70 is provided with an opening 74 through which the collected in the cleaning chamber 70

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Impurities can be discharged.

In the embodiment according to Pig. 9, two cleaning chambers 77 and 78 are provided in a housing 76 surrounding an opening roller 75; one of the cleaning chambers 77 is a roller grate may have unequal height and shape, roller grate 79 can be connected to the jrührungs pin 80 in a rotationally fixed manner, so that by turning, for example by means of a special key, dea guide pin, the most favorable position for the fiber material to be processed can be set Roller grate i 79 to be driven to rotate during operation, for example by an air flow or by a positive drive, m the cleaning chamber 78, which also has a guide pin 80, a corresponding roller grate 79 or, as shown, a filler piece 81 can be used in In a similar manner, further cleaning chambers can be located in the area of the circumference of the opening roller 75 in the housing 76 r or in front of the feed roller and optionally equipped with filler pieces or grate bars with different shapes, depending on the spinning requirements.

In the embodiment of FIGS. 10 and 11 is in one Opening roller 82 surrounding housing 83 above the opening roller 82 a .tieinigungskammer 84 attached, which is below There is negative pressure, in this cleaning chamber 84 are grate bars 85 used, which are firmly connected to a plate 86 or formed in one piece. This comb-like detergent is secured laterally by a housing cover 87, which laterally covers the entire opening roller 82. The housing cover 87 is expediently with Allen screws 88 attached so that it can be pivoted after loosening one or more screws, so that the comb-like Detergent pulled out, and by another or

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H -

also, can be replaced by a filler body. The comb-like Detergent is surrounded by an air strainer 89 which is inserted into the cleaning chamber 84. The grate sieve 89, which is not shown in the plan view according to iiig.11, is supported on lugs 90 of the cleaning chamber 84. jjis has an approximately flat U-shaped cross-section, with its short thighs having slight bends 89a, which continue the resolution of the housing wall a little. The perforated screen 89 on its web can also be attached to the plate 86; but it can also be loose be pushed into the chamber 84 with less resilient tension.

In the embodiment of the above ^l ig.12 Kostsieb 89 shown in the plan view is provided with holes 91, which have different diameters, "as Pig. 13 shows that can rostsieb also be provided with slots 92 89.

In many cases it will be sufficient if the cleaning chamber according to the previous embodiments of the invention only with a cleaning agent designed as a grate screen be provided. A grate screen 93 according to FIGS. 14 and 15, for example, can be used for this purpose. which is placed close to the periphery of an opening roller 94. The grate screen 93 is toothed against the opening roller 94 bent parts 95 are provided. üis is connected to a holder 96, the one on the side wall of a 'housing by resilient Means or clips or the like. can be held. In certain circumstances it may also be useful to use a grate screen according to FIG. 16, which consists of a sheet 97 which is provided with tooth-like parts 98 and 99 bent up in both directions.

In Fig. 17 an embodiment of the invention is shown, in the case of the housing surrounding an 'opening roller 100

209808 / T 554 ~ ^ ~

ΊΟ1 with two having a relatively large distance from one another Nothing chambers 102 and 103 is provided. Id e clearance chambers 1u2 and 103 are, for example, comb-like cleaning means 104 and 105 equipped. Both Cleaning chambers 102 and 103 are provided with a suction channel "or 107, which are located within the housing 101

unite a common channel 108 to which an in_dem

Housing 109 a turbine 11u arranged channel 111 connects This channel can be in a further air channel, not shown or lead an air chamber, with which other purposes serving air flows are connected. In this embodiment of the invention has the housing 1u1 of the opening roller 100 in addition to the channel 112 leading the lasers to the turbine 11U, there is also another channel to the housing 1u9 Turbine 110 leading duct 108, which is intended for the discharge of the impurities. jja the housing 101 from the housing 109 to clean the turbine 110 or to repair sound I'adenbrungen pushed away from the housing 109 or can be pivoted or vice versa, it must be ensured that when the opinnaggregat is closed at the transition the channels 1u8 and 111 no false air enters. Hence can it may be expedient to arrange a seal 113 on one of the two housings 101, 109. Between the suction channels 106 and 107 a slide 114 is arranged through which it is possible to switch off the cleaning chamber 104. in the the rest of the cleaning effect on the opening roller can also can be varied by adjusting the cleaning agents in the chambers, exchanging them or replacing them with filling pieces will. ■

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Claims (1)

- 16 - Patent and protection claims Mj device for cleaning open and pinned devices, characterized in that at least one cleaning chamber in the area of the circumference of the opening roller (5) (8) is arranged with one or more cleaning agents reaching close to the roller set (10) (9) is provided, 2. Apparatus according to claim 1, characterized in that the cleaning agent (9) consists of at least one grate bar (12, 13, H, 15) consists of (Pig. 3). 3. Device according to Anspruoh 2, characterized in that at least one grate bar (71) can be pivoted for itself is (Pig. 8)., 4. Apparatus according to claim 1, characterized in that the cleaning agent consists of at least one food sieve ν89) exists (Pig. 14). 5. Apparatus according to claim 4, characterized in that the grate sieve (, 93) is toothed ^ Pig. H to 16). 6. Apparatus according to claim 1, characterized in that the cleaning agent consists of one or more threats roller grating (.79; with at least two food bars 7. Device according to one or more of claims 1 to 6, characterized in that the cleaning agent (9, Ί9) consists of several unequally high ivoststäben (12, 13, H, 15, 79a, 79b, 79c '; consists (Pig. 3 , 9 ;. 209808/1554 ~ ¹⁷ "" 8. Device according to one or more of claims 1 "to 7, characterized in that the cleaning agent from a combination of food sticks ^ 85) and grate sieves (89) consists (, Pig. 10). 9. Device according to claims T to 5, characterized in that that several .cleaning agents (12, 13 »14,15) are arranged on a common holder (11, 16). 10. Device according to one or more of claims 1 characterized to 9, wherein the consisting of one or a plurality of cleaning means and holder assembly as a whole in the cleaning chamber is laterally insertable (Pig.1 to 7, 10, 15). 11. The device according to one or more of claims 1 to 10, characterized in that the holder for the Cleaning agent as a side rail (11, 30, 45) is formed (Fig. 1, 4, 5). 12. The device according to one or more of claims 1 to 11, characterized in that the holder for the Cleaning agent is designed as a side plate for the cleaning chamber (84) (Pig. 11). " 13. The device according to one or more of claims 1 to 12, characterized in that «that the side Support rail (30, 451 or side plate (87) formed Holder is arranged pivotably and / or displaceably on the roller housing (7, 25, 83) (Pig. 4, 5 »6, 11). 14. Device according to one or more of claims 1 to 13, characterized in that the cleaning agent (61, 63) is arranged to be pivotable about the axis (64) of the opening roller (58) '(Pig. 7). -18- 209808/155 4 2Ö38059 15. The device according to one or more of the address 1 to 14, characterized in that the operating position of the cleaning means (9, 29, 43) resulting from pivoting or displacement of the holder, in particular the distance from the roller set (10, 28), is precisely adjusted by special adjusting means and preferably on scales (40, 55) can be read (, Fig. 1, 4, 5, S). 16. Device according to one or more of claims 1 to 15 »characterized in that the cleaning means (9) and / or parts of their holder protrude into recesses which are arranged on the housing wall receiving the actual holder and / or on the opposite housing wall ^ i ¹ Ig, 2). 17. Device according to one or more of claims 1 to 16, characterized in that the cleaning agent forms one piece with its holder (Pig.2). 18. The device according to one or more of claims 1 to 17 »characterized in that the attachment of the cleaning agent (9) including holder in the housing (7) resilient means (16, 19) takes place (.Pig.2). 19. The device according to one or more of claims 1 to 18, characterized in that the removable Cleaning agent i.61, 79) wholly or partially through a Filler piece (9a, 9b, 67, 81) is replaced, which completely or partially fills the cleaning chamber (6u, 78) (Pig. 7, 9). - ■ 20. Device according to one or more of claims 1 to 19, characterized in that the cleaning means and / or their holders are wholly or partially made of elastic Made of plastic and with these elastic parts 209808/1554 ~ ¹⁹ ~ are held self-locking in the housing (5) (i'ig. 2). 21. Device according to one or more of claims 1 to 20, characterized in that the cleaning chambers (27, 70, 1u2, 103) with a suction channel (42, 74, 106, 107) is connected (Fig. 4, .17). 22. The device according to one or more of claims 1 to 21, characterized in that the rotatable Roller grate (79) formed cleaning agent is rotated by an air stream. 25. Device according to claims 21 and 22, characterized in that that the cleaning chamber (102, 103) is connected to a suction channel (108-) in the roller housing (101) to which a suction channel (111) arranged in the turbine housing (109) connects (Pig. 17) 209808/1554