EP0293409B1 - Screw press - Google Patents

Screw press Download PDF

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Publication number
EP0293409B1
EP0293409B1 EP87907320A EP87907320A EP0293409B1 EP 0293409 B1 EP0293409 B1 EP 0293409B1 EP 87907320 A EP87907320 A EP 87907320A EP 87907320 A EP87907320 A EP 87907320A EP 0293409 B1 EP0293409 B1 EP 0293409B1
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EP
European Patent Office
Prior art keywords
screw
machine
screw press
press according
head wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87907320A
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German (de)
French (fr)
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EP0293409A1 (en
Inventor
Kurt Tegtmeyer
Hermann LÜHRS
Wolfgang Werner
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Salzgitter Maschinenbau GmbH
Original Assignee
Salzgitter Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Salzgitter Maschinenbau GmbH filed Critical Salzgitter Maschinenbau GmbH
Priority to AT87907320T priority Critical patent/ATE47089T1/en
Publication of EP0293409A1 publication Critical patent/EP0293409A1/en
Application granted granted Critical
Publication of EP0293409B1 publication Critical patent/EP0293409B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/128—Vertical or inclined screw presses

Definitions

  • the invention relates to a screw press according to the preamble of claim 1.
  • the housing is constructed in three parts from an upper part, a middle part and a lower part.
  • a drive housing is placed on the upper part.
  • the press spindle is mounted at the bottom in a central track journal bearing and at the top in a combined radial and axial bearing of large diameter of the drive housing.
  • the wet chips are introduced by filling shafts extending upwards on the circumference radially into the upper part, where a circular cylindrical upper extension of the spindle body carries screw blades for pre-compression of the wet chips.
  • the upper part has an end wall which extends in a horizontal plane and is sealed with a stuffing box relative to the upper extension of the press spindle.
  • the overall height and the structural outlay of this pulp press are relatively large.
  • the drive housing with the drives and the upper part load the middle and lower part of the housing.
  • the relatively large axial length of the upper part and the retainers and screw blades of the upper extension of the spindle body acting in the upper part do not yet bring about sufficient pre-compression of the wet chips, despite the effort involved.
  • the invention has for its object to increase the pre-compression of the material to be pressed in the head of the screw press with little structural effort.
  • the longitudinal axis of the screw press can run vertically (standing) or horizontally (lying) or assume any intermediate inclination.
  • the cross-sectional area of the spindle body preferably increases from the inlet side to the outlet side.
  • the slope of the screw blades on the spindle body also preferably decreases from the inlet side to the outlet side.
  • retainers are attached to the housing in a transverse plane between adjacent screw blades and extend up to the vicinity of the spindle body.
  • the end wall can be z. B. welded to the screen wall.
  • the screw-like design of the end wall results in considerable pre-compression of the material to be pressed off as soon as the material has filled the entire second annular space between the screen jacket and the spindle body after the screw press has been started up. After this considerable pre-compression, it becomes easier to achieve the desired high dry matter of the pressed material in the rest of the second annular space up to the outlet annular gap.
  • the screw and connecting parts according to claim 2 can be made of sheet metal and welded together and to the screen jacket of the housing.
  • the inside of the screw and connecting parts can be sealed off directly or indirectly from the spindle body. This seal prevents material and liquid to be squeezed from undesirably penetrating towards the inlet end of the spindle body.
  • Each connecting part prevents material and liquid to be pressed off from getting onto the inlet-side surface of the screw parts.
  • the features of claim 4 prevent premature squeezing of liquid and an associated pressure drop in the material to be squeezed.
  • the space on the inlet side of the Stuimwand is easy to drain.
  • the sealing of the ring wall with respect to the spindle body can be achieved in a particularly simple and functionally reliable manner.
  • the ring wall is preferably circular cylindrical.
  • the ring wall can z. B. be provided with a sliding surface made of stainless steel.
  • a sliding seal made of the plastic known under the trademark Teflon can slide on this sliding surface. In this way, an indirect seal of the end wall with respect to the spindle body is obtained.
  • the slide ring also extends along the connecting parts and consists, for. B. made of stainless steel.
  • the sealing collar can e.g. B. consist of the plastic known under the trademark Teflon.
  • the measures according to claim 9 are particularly simple in terms of production technology.
  • the sealing strip according to claim 10 also extends along the connecting parts and consists, for. B. from the plastic known under the trademark Teflon.
  • a screw press 1 designed as a pulp press has a housing 2 with a circular-cylindrical upper part 3 and a lower part 4, which are screwed together along a plane 5.
  • the lower part 4 rests non-rotatably on one.
  • Stand scaffold 6 and is screwed to it along a plane 7.
  • the stand scaffold 6 is attached to a foundation 8 which rests on a floor 9.
  • a lid 11 is screwed to the upper part 3 along a plane 10, in which manholes 12 and observation openings 13 are provided.
  • the cover 11 carries an upper bearing 16, which can be adjusted in the radial direction with respect to a longitudinal axis 15 of the screw press 1 by an adjusting device 14, in which a stub shaft 17 of a press spindle 18 is rotatably mounted.
  • the cover 11 is surrounded by a railing 19 fastened to the upper part 3.
  • the press spindle 18 is rotatably supported at the bottom in a lower bearing 20 of the lower part 4 designed as a spherical rotary connection and can be driven in rotation by a drive device 21 arranged at the bottom in the stand structure 6.
  • the upper part 3 of the housing 2 has a spray jacket 22 which is divided into axially successive shots and a screen jacket 23 which is arranged within the spray jacket 22 and is likewise divided into axially successive shots.
  • a first annular space 24 is provided for discharging liquid, which is pressed out of the sugar beet chips and passes through the screen jacket 23 to the outside through screen holes not shown in FIG. 1.
  • the screen jacket is provided with such screen holes from compressor blades 25 to level 5 (cf. FIGS. 4A and 4B).
  • the outer surface of the sieve jacket 23 rests on support rings 26 which are axially spaced apart and which are in turn held by comb plates 27 which run axially parallel and are spaced apart in the circumferential direction and are fastened to an inner surface of the spray jacket 22 (cf. also FIG. 6).
  • receptacles 28 are inserted from the outside into receiving openings of the upper part 3, which extend radially inwards into the vicinity of a spindle body 29 of the press spindle 18.
  • the radial extension of the retainers 28 decreases from top to bottom in the same way as the cross-sectional area of the spindle body 29 increases from an upper inlet side 30 of the screw press 1 to its lower outlet side 31.
  • the first annular space 24 is connected to a drainage device 32 in the lower part 4.
  • annular space 33 Between the screen jacket 23 and the spindle body 29 there is a second annular space 33, into which, starting from the plane 10, an annular wall 34 extends from above.
  • the ring wall 34 thus surrounds an upper end region of the spindle body 29 and is welded to the screen jacket 23 via outer web plates 35 (see also FIGS. 4A, 4B and 6).
  • annular seal 36 is provided, which prevents penetration of the material and liquid to be squeezed out into a wedge-shaped annular space 37 between the upper end region of the spindle body 29 and the annular wall 34. 5 shows details of the ring seal 36.
  • the second annular space 33 is delimited at the top by a screw-like end wall 38 which is welded tightly to the outside of the screen jacket 23 and also tightly welded to the ring wall 34 on the inside.
  • the end wall 38 is composed of 39 and a current is also made of sheet metal connecting part 40 in the Ausutungsbeispiel of FIG. 1 from a prepared sheet metal screw portion ".
  • the upper part 3 has a rectangular filling opening 41, are filled through which Ncorroschnitzel in the second annulus 33 From an inlet-side axial end 42 of the filling opening 41, the screw part 39 extends in a circumferential direction 43 of the press spindle 18 to an outlet-side axial end 44 of the filling opening 41.
  • An inlet-side start 45 of the screw part 39 is through with an outlet-side end 46 of the screw part 39 the connecting part 40 is tightly connected
  • the connecting part 40 is arranged in a plane running through the longitudinal axis 15.
  • the screen jacket 23 has no holes for the passage of squeezed liquid in the area between the compressor blades 25 and the end wall 38.
  • the compressor blades 25 are each attached to the inside of the spindle body 29.
  • the spindle body 29 is also only through from the compressor blades 25 downwards Refractions 47 provided for the passage of squeezed liquid.
  • Observation windows 48 are provided in the screw part 39 and are aligned in the axial direction with the observation openings 13 in the cover 11.
  • Observation windows 49 are also inserted into the upper part 3, only one of which is shown in FIG. 1, namely offset in the circumferential direction.
  • the observation windows 49 allow a view into the second annular space 33 below the end wall 38 from the side.
  • a working platform 50 is attached which extends over approximately one third of the circumference (cf. FIG. 2).
  • the spindle body 29 is hollow and has an interior 51, into which the openings 47 allow liquid that has been squeezed out to pass.
  • the interior 51 ends at the bottom in an upwardly open ring channel 52.
  • the ring channel 52 is defined by an annular bottom 53 of the spindle body 29, a ring 54 extending upwards beyond the bottom 53 of a central bottom socket 55 of the spindle body 29 and a side wall 56 of the spindle body 29.
  • the bottom 53 has an outlet connection 57 arranged on a circle concentric to the longitudinal axis 15 of the screw press 1.
  • the bottom socket 55 is connected to an inner ring of the lower bearing and to a telescopic drive tube 58 which extends downwards.
  • An upper tube 59 and. a down tube 60 of the drive tube 58 are connected to one another by a tooth coupling 61.
  • the down tube 60 is screwed along a plane 62 to a drive connection 63, which is rotatably mounted in a drive bearing 64.
  • the drive connector 63 has a toothed ring 65 on the outside, with which pinions 66 of stationary drives 67 mesh.
  • the outlet ports 57 open into the drainage device 32.
  • Manholes 68 are provided in the spindle body 29 at the top.
  • the spindle body 29 also carries outwardly extending screw blades 69, at least approximately in contact with the screen jacket 23, the pitch and axial distance of which decrease from the inlet side 30 to the outlet side 31.
  • a retaining ring 70 projecting radially outward beyond the side wall 56 is screwed, which defines with the screen jacket 23 an outlet ring gap 71 for the pressing chips.
  • the press chips fall into an annular space 72 of the lower part 4, in which clearing vanes 73, which are fastened to the underside of the base 53, rotate.
  • diametrically opposite discharge openings 75 are provided, each of which discharge the press chips into a chute 76.
  • the circular arc shape of the filling opening 41 between an outer end point of the connecting part 40 and a point 77 can be seen in the plan view.
  • the rectangular shape of the filling opening 41 in the side view can be seen in FIGS. 1 and 4A and 4B.
  • a filler neck 78 extends tangentially outward from the fill opening 41 and merges into a circular cross-sectional shape up to its flange 79.
  • a tubular stuffing screw 80 is connected to the flange 79 and is used to supply the wet chips under pressure in the direction of the arrow 81.
  • FIG 3 shows how the screw part 39 and the connecting part 40 are tightly fastened to one another on the one hand and to the ring wall 34 on the other hand by welding. Two of the web plates 35 above the screw part 39 can also be seen.
  • a radially inwardly extending stiffening ring 82 is welded to the inside of the ring wall 34.
  • the openings 47 in the spindle body 29 start from the plane of the compressor blades 25 downwards.
  • the screen jacket 23 is provided with holes 83 for the passage of squeezed liquid only from the compressor blades 25 downwards.
  • Condensate which forms above the screw part 39, can drain through drainage holes 84 in the ring wall 34 and drainage holes 85 in the screen jacket 23, which are each provided directly above the screw part 39. The condensate then runs on the one hand into the wedge-shaped annular space 37 and on the other hand into the first annular space 24.
  • a mounting flange 90 is welded to the spray jacket 22 at the top.
  • the embodiment of the screw press 1 shown in the previous figures works as follows: When starting up, wet chips are fed through the stuffing screw 80 according to FIG. 2 and the filler neck 78 of the filling opening 41, through which the wet chips fall down into the second annular space 33.
  • the retaining ring 70 (FIG. 1) prevents the chips from immediately falling into the annular space 72 through the outlet annular gap 71.
  • the press spindle 18 rotates, the second annular space 33 fills more and more with chips until it reaches the underside of the screw-like end wall 38. From that moment on starts at continued circulation of the press spindle 18, mechanical compression of the wet chips in the second annular space 33 above the compressor blades 25.
  • the increasing and finally complete filling of the second annular space 33 with wet chips can be followed through the observation openings 13 and the observation windows 48 aligned therewith, and through the observation windows 49 .
  • the screw part 39 supported by the overfeed through the stuffing screw 80, causes a considerable increase in pressure of the wet chips above the compressor blades 25. This pre-compression is further supported and increased by the compressor blades 25 before the chip material to be pressed, which is pre-compressed in this way, passes the uppermost holdings 28 into the area of action of the uppermost screw vanes 69 and is increasingly compressed and dewatered by this and the second annular space 33, which tapers increasingly downward .
  • the squeezed liquid flows both outwards into the first annular space 24 of the housing 2 and into the interior 51 of the spindle body 29 and flows out through the dewatering device 32 in both cases. Due to this special pressure treatment and compression at the outlet ring gap 71, the press chips achieve a particularly high dry substance. This is also due to the fact that there are no holes for the passage of squeezed liquid in the area of the screen jacket 23 opposite the screw-shaped end wall 38. This promotes the increase in pressure in this precompression zone.
  • the screw press has a further filling opening 91 which is arranged diametrically opposite the filling opening 41. There is a tangential to the further filling opening 91.
  • the screw part 39 extends in FIG. 7 only in the direction of rotation 43 over 180 ° from the connecting part 40 to a further connecting part 95, which is arranged diametrically to the connecting part 40.
  • a further screw part 96 extends in the circumferential direction 43 from an inlet-side end of the further connecting part 95 to an outlet-side end of the connecting part 40.
  • the screw parts 39 and 96 form a "two-start thread" to a certain extent. It is also possible to provide more than the two filling openings 41 and 91 on the upper part 3.
  • the screw-like end wall 38 would then be correspondingly "versatile". This "multiple movement” enables a more uniform distribution of pressure increase over the circumference of the screw press 1 to be achieved.
  • the end wall 38 which can be configured as “single-start or“ multi-start ”in the manner described above and is provided with a connecting part not shown in FIG.
  • the slide ring 97 also extends along the at least one connecting part, not shown in FIG. 8, and is in radial sealing contact with an at least externally circular-cylindrical sealing sleeve 98.
  • the sealing sleeve 98 is fastened with countersunk screws 99 to an inlet-side part of the spindle body 29 and extends into axial direction over the entire stroke of the end wall 38.
  • the sealing sleeve 98 can consist of the plastic known under the trademark Teflon.
  • Fig. 9 shows another embodiment of the screw press 1, in which the end wall 38 carries a screw-like sealing strip 100 on the inside, which, for. B. consists of the plastic known under the trademark Teflon.
  • the sealing strip 100 also extends along the inner edge of the at least one connecting part, not shown in FIG. 9, of the end wall 38 and is fixed with countersunk screws 101 to an axially parallel, screw-like plate 102 of the end wall 38.
  • the sealing strip 100 is in sealing contact with a circular cylindrical outer surface 103 at the end of the spindle body 29 on the inlet side.

Abstract

PCT No. PCT/EP87/00670 Sec. 371 Date Jul. 25, 1988 Sec. 102(e) Date Jul. 25, 1988 PCT Filed Nov. 4, 1987 PCT Pub. No. WO88/04232 PCT Pub. Date Jun. 16, 1988.A spindle press comprises a housing with a circular cylindrical upper part and a lower part. A press spindle, which is drivable in a rotating manner via a drive pipe by a drive arrangement, is supported in an upper bearing and a lower bearing of the housing so as to be rotatable. A spindle body of the press spindle carries worm wings on the outside and compressor blades farther above, which all extend in the vicinity of a screen casing of the upper part. The screen casing is enclosed at a distance by a spray casing and provided with holes for pressed out fluid only from the compressor blades down. The spindle body also comprises perforations for the pressed out fluid only from the compressor blades down. Above the compressor blades a helically constructed front wall is welded in between an annular wall and the screen casing which is unperforated at that point. On the lower side of the front wall, wet pulp arrives tangentially through a filling opponent of the upper part.

Description

Die Erfindung betrifft eine Spindelpresse gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a screw press according to the preamble of claim 1.

Bei einer bekannten, als Schnitzelpresse ausgebildeten Spindelpresse dieser Art (DE-A-23 64 292) ist das Gehäuse dreiteilig aus einem Oberteil, einem Mittelteil und einem Unterteil aufgebaut. Auf das Oberteil ist noch ein Antriebsgehäuse gesetzt. Die Preßspindel ist unten in einem zentralen Spurzapfenlager und oben in einem kombinierten Radial- und Axiallager großen Durchmessers des Antriebsgehäuses gelagert. Die Naßschnitzel werden durch sich nach oben erstreckende Füllschächte umfangsseitig radial in das Aufhalter aufweisende Oberteil eingebracht, wo ein kreiszylindrischer oberer Fortsatz des Spindelkörpers Schneckenflügel zur Vorverdichtung der Naßschnitzel trägt. Das Oberteil weist oben eine sich in einer waagerechten Ebene erstreckende und mit einer Stopfbuchse gegenüber dem oberen Fortsatz der Preßspindel abgedichtete Stimwand auf. Die Bauhöhe und der bauliche Aufwand dieser Schnitzelpresse sind verhältnismäßig groß. Das Antriebsgehäuse mit den Antrieben und das Oberteil belasten Mittel-und Unterteil des Gehäuses. Die verhältnismäßig große axiale Länge des Oberteils sowie die in dem Oberteil wirkenden Aufhalter und Schneckenflügel des oberen Fortsatzes des Spindelkörpers bringen trotz des damit verbundenen Aufwandes noch nicht eine ausreichende Vorverdichtung der Naßschnitzel.In the case of a known screw press of this type (DE-A-23 64 292) in the form of a pulp press, the housing is constructed in three parts from an upper part, a middle part and a lower part. A drive housing is placed on the upper part. The press spindle is mounted at the bottom in a central track journal bearing and at the top in a combined radial and axial bearing of large diameter of the drive housing. The wet chips are introduced by filling shafts extending upwards on the circumference radially into the upper part, where a circular cylindrical upper extension of the spindle body carries screw blades for pre-compression of the wet chips. The upper part has an end wall which extends in a horizontal plane and is sealed with a stuffing box relative to the upper extension of the press spindle. The overall height and the structural outlay of this pulp press are relatively large. The drive housing with the drives and the upper part load the middle and lower part of the housing. The relatively large axial length of the upper part and the retainers and screw blades of the upper extension of the spindle body acting in the upper part do not yet bring about sufficient pre-compression of the wet chips, despite the effort involved.

Der Erfindung liegt die Aufgabe zugrunde, die Vorverdichtung des abzupressenden Guts im Kopf der Spindelpresse mit geringem baulichen Aufwand zu steigern.The invention has for its object to increase the pre-compression of the material to be pressed in the head of the screw press with little structural effort.

Diese Aufgabe ist durch die Merkmale des Anspruchs 1 gelöst. Die Längsachse der Spindelpresse kann senkrecht (stehend) oder waagerecht (liegend) verlaufen oder jede Zwischenneigung einnehmen. Vorzugsweise nimmt bei kreiszylindrischem Gehäuse die Querschnittsfläche des Spindelkörpers von der Einlaßseite zur Auslaßseite hin zu. Ebenso vorzugsweise nimmt die Steigung der Schneckenflügel auf dem Spindelkörper von der Einlaßseite zur Auslaßseite hin ab. In der Regel sind zwischen benachbarten Schneckenflügeln Aufhalter jeweils in einer Querebene verteilt an dem Gehäuse befestigt und erstrecken sich bis in die Nähe des Spindelkörpers. Die Stirnwand kann außen z. B. mit der Siebwand verschweißt sein. Durch die schraubenartige Ausbildung der Stirnwand ergibt sich eine erhebliche Vorverdichtung des abzupressenden Guts, sobald nach dem Anfahren der Spindelpresse das Gut den gesamten zweiten Ringraum zwischen dem Siebmantel und dem Spindelkörper angefüllt hat. Nach dieser erheblichen Vorverdichtung fällt es leichter, in dem Rest des zweiten Ringraums bis zum Auslaßringspalt die gewünscht hohe Trockensubstanz des abgepreßten Guts zu erreichen.This object is solved by the features of claim 1. The longitudinal axis of the screw press can run vertically (standing) or horizontally (lying) or assume any intermediate inclination. In the case of a circular cylindrical housing, the cross-sectional area of the spindle body preferably increases from the inlet side to the outlet side. The slope of the screw blades on the spindle body also preferably decreases from the inlet side to the outlet side. As a rule, retainers are attached to the housing in a transverse plane between adjacent screw blades and extend up to the vicinity of the spindle body. The end wall can be z. B. welded to the screen wall. The screw-like design of the end wall results in considerable pre-compression of the material to be pressed off as soon as the material has filled the entire second annular space between the screen jacket and the spindle body after the screw press has been started up. After this considerable pre-compression, it becomes easier to achieve the desired high dry matter of the pressed material in the rest of the second annular space up to the outlet annular gap.

Die Schrauben- und Verbindungsteile gemäß Anspruch 2 können aus Blech gefertigt und miteinander und mit dem Siebmantel des Gehäuses verschweißt sein. Die Abdichtung der Schrauben-und Verbindungsteile innen gegenüber dem Spindelkörper kann direkt oder Indirekt geschehen. Diese Abdichtung verhindert, daß abzupressendes Gut und Flüssigkeit in unerwünschter Weise zum einlaßseitigen Ende des Spindelkörpers hin durchdringen. Jedes Verbindungsteil verhindert, daß abzupressendes Gut und Flüssigkeit auf die einlaßseitige Fläche der Schraubenteile geraten.The screw and connecting parts according to claim 2 can be made of sheet metal and welded together and to the screen jacket of the housing. The inside of the screw and connecting parts can be sealed off directly or indirectly from the spindle body. This seal prevents material and liquid to be squeezed from undesirably penetrating towards the inlet end of the spindle body. Each connecting part prevents material and liquid to be pressed off from getting onto the inlet-side surface of the screw parts.

Gemäß Anspruch 3 ergibt sich eine besonders geringe Bauhöhe der Spindelpresse, weil das Oberteil gemäß der DE-A-23 64 292 eingespart wird. Die dichte Verbindung kann z. B. durch Schweißen hergestellt werden.According to claim 3, there is a particularly low overall height of the screw press, because the upper part according to DE-A-23 64 292 is saved. The tight connection can e.g. B. be produced by welding.

Die Merkmale des Anspruchs 4 verhindern frühzeitiges Auspressen von Flüssigkeit und einen damit verbundenen Druckabfall in dem abzupressenden Gut.The features of claim 4 prevent premature squeezing of liquid and an associated pressure drop in the material to be squeezed.

Gemäß Anspruch 5 ist der Raum einlaßseitig von der Stuimwand auf einfache Weise zu entwässern.According to claim 5, the space on the inlet side of the Stuimwand is easy to drain.

Mit den Merkmalen des Anspruchs 6 läßt sich auf besonders einfache und funktionssichere Weise die Abdichtung der Ringwand gegenüber dem Spindelkörper erreichen. Vorzugsweise ist die Ringwand kreiszylindrisch ausgebildet. Die Ringwand kann innen z. B. mit einer Gleitfläche aus nichtrostendem Stahl versehen sein. Auf dieser Gleitfläche kann eine Gleitdichtung aus dem unter dem Warenzeichen Teflon bekannten Kunststoff gleiten. Auf diese Weise erhält man eine mittelbare Abdichtung der Stirnwand gegenüber dem Spindelkörper.With the features of claim 6, the sealing of the ring wall with respect to the spindle body can be achieved in a particularly simple and functionally reliable manner. The ring wall is preferably circular cylindrical. The ring wall can z. B. be provided with a sliding surface made of stainless steel. A sliding seal made of the plastic known under the trademark Teflon can slide on this sliding surface. In this way, an indirect seal of the end wall with respect to the spindle body is obtained.

Es ist jedoch auch die direkte Abdichtung in diesem Bereich gemäß Anspruch 7 möglich.However, direct sealing in this area is also possible.

Dazu kann gemäß Anspruch 8 vorgegangen werden. Der Gleitring erstreckt sich dabei auch entlang der Verbindungsteile und besteht z. B. aus nichtrostendem Stahl. Die Dichtungsmanschette kann z. B. aus dem unter dem Warenzeichen Teflon bekannten Kunststoff bestehen.This can be done according to claim 8. The slide ring also extends along the connecting parts and consists, for. B. made of stainless steel. The sealing collar can e.g. B. consist of the plastic known under the trademark Teflon.

Die Maßnahmen gemäß Anspruch 9 sind fertigungstechnisch besonders einfach.The measures according to claim 9 are particularly simple in terms of production technology.

Die Dichtungsleiste gemäß Anspruch 10 erstreckt sich auch entlang der Verbindungsteile und besteht z. B. aus dem unter dem Warenzeichen Teflon bekannten Kunststoff.The sealing strip according to claim 10 also extends along the connecting parts and consists, for. B. from the plastic known under the trademark Teflon.

Gemäß Anspruch 11 erzielt man eine weitere Vorverdichtung des abzupressenden Guts im Kopf der Spindelpresse.According to claim 11, a further pre-compression of the material to be pressed in the head of the screw press is achieved.

Mit den Merkmalen des Anspruchs 12 wird ein frühzeitiges Auspressen von Flüssigkeit auch am Spindelkörper verhindert.With the features of claim 12, premature squeezing of liquid is prevented even on the spindle body.

Der Beginn des Auslassens ausgepreßter Flüssigkeit gemäß Anspruch 13 hat sich als besonders zweckmäßig erwiesen.The beginning of the discharge of squeezed liquid according to claim 13 has proven to be particularly useful.

Mit den Merkmalen des Anspruchs 14 ergibt sich ein erhöhter Druck des abzupressenden Guts schon in der Füllöffnung. Durch dieses « Überfüllen » des zweiten Ringraums im Kopf der Spindelpresse wird einerseits eine geringe Bauhöhe erreicht und andererseits günstige Voraussetzungen für das Erreichen besonders hoher Trockensubstanz am Auslaßringspalt des zweiten Ringraums geschaffen.With the features of claim 14 there is an increased pressure of the material to be squeezed out already in the filling opening. This “overfilling” of the second annular space in the head of the screw press on the one hand makes it small Overall height reached and, on the other hand, favorable conditions for achieving particularly high dry matter at the outlet annular gap of the second annular space were created.

Gemäß Anspruch 15 ergibt sich eine besonders strömungsgünstige Einspeisung der Naßschnitzel in den zweiten Ringraum.According to claim 15, there is a particularly streamlined feed of the wet chips into the second annular space.

Die Erfindung wird nachfolgend anhand der in den Zeichnungen dargestellten Ausführungsbeispiele näher erläutert. Es zeigt:

  • Fig. 1 einen Längsschnitt gemäß Linie I-I in Fig. 2 durch eine stehend angeordnete, als Schnitzeipresse ausgebildete Spindelpresse,
  • Fig. 2 die Draufsicht auf die Spindelpresse gemäß Linie 11-11 in Fig. 1,
  • Fig. 3 die Ansicht gemäß Linie III-III in Fig. 2 auf einen Teil der Spindelpresse ohne Siebmantel in vergrößerter Darstellung,
  • Fig. 4A und 4B den oberen Teil der Fig. 1 in vergrößerter Darstellung,
  • Fig. 5 das Detail V in Fig. 4A in vergrößerter Darstellung,
  • Fig. 6 die Ansicht gemäß Linie VI-VI in Fig. 1 in vergrößerter Darstellung,
  • Fig. 7 eine der Fig. 2 entsprechende Draufsicht auf eine andere Ausführungsform der Spindelpresse mit zwei Füllöffnungen,
  • Fig. 8 einen teilweisen Längsschnitt durch den Kopf einer anderen Spindelpresse und
  • Fig. 9 einen teilweisen Längsschnitt durch den Kopf einer wiederum anderen Spindelpresse.
The invention is explained in more detail below on the basis of the exemplary embodiments illustrated in the drawings. It shows:
  • 1 shows a longitudinal section along line II in FIG. 2 through a standing spindle press designed as a carving press,
  • 2 shows the top view of the screw press according to line 11-11 in FIG. 1,
  • 3 shows the view according to line III-III in FIG. 2 of part of the screw press without a screen jacket in an enlarged view,
  • 4A and 4B, the upper part of FIG. 1 in an enlarged view,
  • 5 shows the detail V in FIG. 4A in an enlarged view,
  • 6 is an enlarged view of the line VI-VI in FIG. 1,
  • 7 shows a top view corresponding to FIG. 2 of another embodiment of the screw press with two filling openings,
  • Fig. 8 is a partial longitudinal section through the head of another screw press and
  • Fig. 9 is a partial longitudinal section through the head of yet another screw press.

In Fig. 1 weist eine als Schnitzelpresse ausgebildete Spindelpresse 1 ein Gehäuse 2 mit einem kreiszylindrischen Oberteil 3 und einem Unterteil 4 auf, die längs einer Ebene 5 miteinander verschraubt sind. Das Unterteil 4 ruht drehfest auf einem. Standgerüst 6 und ist mit diesem längs einer Ebene 7 verschraubt. Das Standgerüst 6 ist an einem Fundament 8 befestigt, das auf einem Boden 9 ruht.In FIG. 1, a screw press 1 designed as a pulp press has a housing 2 with a circular-cylindrical upper part 3 and a lower part 4, which are screwed together along a plane 5. The lower part 4 rests non-rotatably on one. Stand scaffold 6 and is screwed to it along a plane 7. The stand scaffold 6 is attached to a foundation 8 which rests on a floor 9.

Mit dem Oberteil 3 ist längs einer Ebene 10 ein Deckel 11 verschraubt, in dem Mannlöcher 12 und Beobachtungsöffnungen 13 vorgesehen sind. Der Deckel 11 trägt ein oberes, durch eine Einstellvorrichtung 14 in radialer Richtung bezüglich einer Längsachse 15 der Spindelpresse 1 einstellbares Lager 16, in dem ein Wellenstumpf 17 einer Preßspindel 18 drehbar gelagert ist. Der Deckel 11 ist von einem an dem Oberteil 3 befestigten Geländer 19 umgeben.A lid 11 is screwed to the upper part 3 along a plane 10, in which manholes 12 and observation openings 13 are provided. The cover 11 carries an upper bearing 16, which can be adjusted in the radial direction with respect to a longitudinal axis 15 of the screw press 1 by an adjusting device 14, in which a stub shaft 17 of a press spindle 18 is rotatably mounted. The cover 11 is surrounded by a railing 19 fastened to the upper part 3.

Die Preßspindel 18 ist unten in einem als Kugeldrehverbindung ausgebildeten unteren Lager 20 des Unterteils 4 drehbar gelagert und durch eine unten in dem Standgerüst 6 angeordnete Antriebseinrichtung 21 drehend antreibbar.The press spindle 18 is rotatably supported at the bottom in a lower bearing 20 of the lower part 4 designed as a spherical rotary connection and can be driven in rotation by a drive device 21 arranged at the bottom in the stand structure 6.

Das Oberteil 3 des Gehäuses 2 weist einen in axial aufeinanderfolgende Schüsse unterteilten Spritzmantel 22 und einen innerhalb des Spritzmantels 22 angeordneten, ebenfalls in axial aufeinanderfolgende Schüsse unterteilten Siebmantel 23 auf. Zwischen dem Sprintzmantel 22 und dem Siebmantel 23 ist ein erster Ringraum 24 zur Ableitung von Flüssigkeit vorgesehen, die aus den Zuckerrübenschnitzeln ausgepreßt wird und durch in Fig. 1 nicht gezeichnete Sieblöcher durch den Siebmantel 23 nach außen hin durchtritt. Der Siebmantel ist von Verdichterschaufeln 25 an bis zur Ebene 5 mit solchen Sieblöchem versehen (vgl. Fig. 4A und 4B). Der Siebmantel 23 liegt außen an in axialen Abstand voneinander angeordneten Stützringen 26 an, die ihrerseits von achsparallel verlaufenden, in Umfangsrichtung im Abstand voneinander angeordneten, an einer Innenfläche des Spritzmantels 22 befestigten Kammblechen 27 gehalten werden (vgl. auch Fig. 6). In mehreren Höhenebenen sind in Aufnahmeöffnungen des Oberteils 3 von außen her Aufhalter 28 eingesetzt, die sich radial nach innen bis in die Nähe eines Spindelkörpers 29 der Preßspindel 18 erstrecken. Die radiale Erstreckung der Aufhalter 28 nimmt von oben nach unten in der gleichen Weise ab, wie die Querschnittsfläche des Spindelkörpers 29 von einer oberen Einlaßseite 30 der Spindelpresse 1 zu deren unterer Auslaßseite 31 hin zunimmt. Der erste Ringraum 24 ist mit einer Entwässerungsvorrichtung 32 im Unterteil 4 verbunden.The upper part 3 of the housing 2 has a spray jacket 22 which is divided into axially successive shots and a screen jacket 23 which is arranged within the spray jacket 22 and is likewise divided into axially successive shots. Between the sprint jacket 22 and the screen jacket 23, a first annular space 24 is provided for discharging liquid, which is pressed out of the sugar beet chips and passes through the screen jacket 23 to the outside through screen holes not shown in FIG. 1. The screen jacket is provided with such screen holes from compressor blades 25 to level 5 (cf. FIGS. 4A and 4B). The outer surface of the sieve jacket 23 rests on support rings 26 which are axially spaced apart and which are in turn held by comb plates 27 which run axially parallel and are spaced apart in the circumferential direction and are fastened to an inner surface of the spray jacket 22 (cf. also FIG. 6). In several height levels, receptacles 28 are inserted from the outside into receiving openings of the upper part 3, which extend radially inwards into the vicinity of a spindle body 29 of the press spindle 18. The radial extension of the retainers 28 decreases from top to bottom in the same way as the cross-sectional area of the spindle body 29 increases from an upper inlet side 30 of the screw press 1 to its lower outlet side 31. The first annular space 24 is connected to a drainage device 32 in the lower part 4.

Zwischen dem Siebmantel 23 und dem Spindelkörper 29 besteht ein zweiter Ringraum 33, in den sich, ausgehend von der Ebene 10, von oben her eine Ringwand 34 erstreckt. Die Ringwand 34 umgibt also einen oberen Endbereich des Spindelkörpers 29 und ist über äußere Stegbleche 35 (s. auch Fig. 4A, 4B und 6) mit dem Siebmantel 23 verschweißt. Zwischen dem Spindelkörper 29 und der Ringwand 34 ist eine Ringdichtung 36 vorgesehen, die ein Durchdringen von abzupressendem Gut und Flüssigkeit nach oben hin in einen keilförmigen Ringraum 37 zwischen dem oberen Endbereich des Spindelkörpers 29 und der Ringwand 34 verhindert. Einzelheiten der Ringdichtung 36 zeigt Fig. 5.Between the screen jacket 23 and the spindle body 29 there is a second annular space 33, into which, starting from the plane 10, an annular wall 34 extends from above. The ring wall 34 thus surrounds an upper end region of the spindle body 29 and is welded to the screen jacket 23 via outer web plates 35 (see also FIGS. 4A, 4B and 6). Between the spindle body 29 and the annular wall 34, an annular seal 36 is provided, which prevents penetration of the material and liquid to be squeezed out into a wedge-shaped annular space 37 between the upper end region of the spindle body 29 and the annular wall 34. 5 shows details of the ring seal 36.

Der zweite Ringraum 33 ist nach oben hin durch eine schraubenartig ausgebildete Stirnwand 38 begrenzt, die außen dicht mit dem Siebmantel 23 und innen ebenfalls dicht mit der Ringwand 34 verschweißt ist. Die Stimwand 38 ist bei dem Ausfühtungsbeispiel gemäß Fig. 1 aus einem aus Blech hergestellten Schraubenteil" 39 und einem ebenfalls aus Blech bestehenden Verbindungsteil 40 zusammengesetzt. Das Oberteil 3 weist eine rechteckige Füllöffnung 41 auf, durch die hindurch Naßschnitzel in den zweiten Ringraum 33 eingefüllt werden. Von einem einlaßseitigen axialen Ende 42 der Füllöffnung 41 erstreckt sich das Schraubenteil 39 in einer Umlaufrichtung 43 der Preßspindel 18 bis zu einem auslaßseitigen axialen Ende 44 der Füllöffnung 41. Ein einlaßseitiger Anfang 45 des Schraubenteils 39 ist mit einem auslaßseitigen Ende 46 des Schraubenteils 39 durch das Verbindungsteil 40 dicht verbunden. Das Verbindungsteil 40 ist in einer durch die Längsachse 15 verlaufenden Ebene angeordnet.The second annular space 33 is delimited at the top by a screw-like end wall 38 which is welded tightly to the outside of the screen jacket 23 and also tightly welded to the ring wall 34 on the inside. The end wall 38 is composed of 39 and a current is also made of sheet metal connecting part 40 in the Ausfühtungsbeispiel of FIG. 1 from a prepared sheet metal screw portion ". The upper part 3 has a rectangular filling opening 41, are filled through which Naßschnitzel in the second annulus 33 From an inlet-side axial end 42 of the filling opening 41, the screw part 39 extends in a circumferential direction 43 of the press spindle 18 to an outlet-side axial end 44 of the filling opening 41. An inlet-side start 45 of the screw part 39 is through with an outlet-side end 46 of the screw part 39 the connecting part 40 is tightly connected The connecting part 40 is arranged in a plane running through the longitudinal axis 15.

Der Siebmantel 23 weist in dem Bereich zwischen den Verdichterschaufeln 25 und der Stirnwand 38 keine Löcher für den Durchlaß ausgepreßter Flüssigkeit auf. Die Verdichterschaufeln 25 sind jeweils innen an dem Spindelkörper 29 befestigt. Auch der Spindelkörper 29 ist erst von den Verdichterschaufeln 25 an abwärts mit Durchbrechungen 47 für den Durchlaß ausgepreßter Flüssigkeit versehen.The screen jacket 23 has no holes for the passage of squeezed liquid in the area between the compressor blades 25 and the end wall 38. The compressor blades 25 are each attached to the inside of the spindle body 29. The spindle body 29 is also only through from the compressor blades 25 downwards Refractions 47 provided for the passage of squeezed liquid.

In dem Schraubenteil 39 sind Beobachtungsfenster 48 vorgesehen, die in axialer Richtung mit den Beobachtungsöffnungen 13 in dem Deckel 11 fluchten. Auch in das Oberteil 3 sind Beobachtungsfenster 49 eingesetzt, von denen in Fig. 1 nur eines, und zwar in Umfangsrichtung versetzt, eingezeichnet ist. Die Beobachtungsfenster 49 ermöglichen von der Seite her die Einsicht in den zweiten Ringraum 33 unterhalb der Stirnwand 38. An der Außenseite des Oberteils 3 ist eine sich über etwa ein Drittel des Umfangs erstreckende Arbeitsbühne 50 befestigt (vgl. Fig. 2).Observation windows 48 are provided in the screw part 39 and are aligned in the axial direction with the observation openings 13 in the cover 11. Observation windows 49 are also inserted into the upper part 3, only one of which is shown in FIG. 1, namely offset in the circumferential direction. The observation windows 49 allow a view into the second annular space 33 below the end wall 38 from the side. On the outside of the upper part 3, a working platform 50 is attached which extends over approximately one third of the circumference (cf. FIG. 2).

Der Spindelkörper 29 ist hohl und weist einen Innenraum 51 auf, in den die Durchbrechungen 47 ausgepreßte Flüssigkeit durchtreten lassen. Der Innenraum 51 endet unten in einem nach oben offenen Ringkanal 52. Der Ringkanal 52 ist definiert durch einen ringförmigen Boden 53 des Spindelkörpers 29, einen sich über den Boden 53 hinaus nach oben erstreckenden Ring 54 eines mittigen Bodenstutzens 55 des Spindelkörpers 29 und eine Seitenwand 56 des Spindelkörpers 29.. Der Boden 53 besitzt auf einem zu der Längsachse 15 der Spindelpresse 1 konzentrischen Kreis angeordnete Auslaßstutzen 57.The spindle body 29 is hollow and has an interior 51, into which the openings 47 allow liquid that has been squeezed out to pass. The interior 51 ends at the bottom in an upwardly open ring channel 52. The ring channel 52 is defined by an annular bottom 53 of the spindle body 29, a ring 54 extending upwards beyond the bottom 53 of a central bottom socket 55 of the spindle body 29 and a side wall 56 of the spindle body 29. The bottom 53 has an outlet connection 57 arranged on a circle concentric to the longitudinal axis 15 of the screw press 1.

Der Bodenstutzen 55 ist mit einem Innenring des unteren Lagers und mit einem teleskopierbaren Antriebsrohr 58 verbunden, das sich nach unten erstreckt. Ein Oberrohr 59 und. ein Unterrohr 60 des Antriebsrohrs 58 sind durch eine Zahnkupplung 61 miteinander verbunden. Das Unterrohr 60 ist längs einer Ebene 62 mit einem Antriebsstutzen 63 verschraubt, der in einem Antriebslager 64 drehbar gelagert ist. Der Antriebsstutzen 63 trägt'außen einen Zahnkranz 65, mit dem Ritzel 66 von stationären Antrieben 67 kämmen.The bottom socket 55 is connected to an inner ring of the lower bearing and to a telescopic drive tube 58 which extends downwards. An upper tube 59 and. a down tube 60 of the drive tube 58 are connected to one another by a tooth coupling 61. The down tube 60 is screwed along a plane 62 to a drive connection 63, which is rotatably mounted in a drive bearing 64. The drive connector 63 has a toothed ring 65 on the outside, with which pinions 66 of stationary drives 67 mesh.

Die Auslaßstutzen 57 münden in die Entwässerungsvorrichtung 32. In dem Spindelkörper 29 sind oben Mannlöcher 68 vorgesehen. Der Spindelkörper 29 trägt ferner sich nach außen zumindest annähernd in Berührung mit dem Siebmantel 23 erstreckende Schneckenflügel 69, deren Steigung und axialer Abstand voneinander von der Einlaßseite 30 zur Auslaßseite 31 hin abnehmen. An der Unterseite des Bodens 53 ist ein radial nach außen über die Seitenwand 56 vorstehenden Stauring 70 angeschraubt, der mit dem Siebmantel 23 einen Auslaßringspalt 71 für die Preßschnitzel definiert. Die Preßschnitzel fallen nach dem Verlassen des Auslaßringspalts 71 in einen Ringraum 72 des Unterteils 4, in dem Räumflügel 73 umlaufen, die an der Unterseite des Bodens 53 festgemacht sind. In einem Ringblech 74 des Unterteils 4 sind diametral gegenüberliegende Ausfallöffnungen 75 angebracht, welche die Preßschnitzel jeweils in einen Fallschacht 76 abgeben.The outlet ports 57 open into the drainage device 32. Manholes 68 are provided in the spindle body 29 at the top. The spindle body 29 also carries outwardly extending screw blades 69, at least approximately in contact with the screen jacket 23, the pitch and axial distance of which decrease from the inlet side 30 to the outlet side 31. On the underside of the bottom 53, a retaining ring 70 projecting radially outward beyond the side wall 56 is screwed, which defines with the screen jacket 23 an outlet ring gap 71 for the pressing chips. After leaving the outlet annular gap 71, the press chips fall into an annular space 72 of the lower part 4, in which clearing vanes 73, which are fastened to the underside of the base 53, rotate. In an annular plate 74 of the lower part 4 diametrically opposite discharge openings 75 are provided, each of which discharge the press chips into a chute 76.

In Fig. 2 ist in der Draufsicht die Kreisbogenform der Füllöffnung 41 zwischen einem äußeren Endpunkt des Verbindungsteils 40 und einem Punkt 77 erkennbar. Die in der Seitenansicht rechteckige Form der Füllöffnung 41 ist den Fig. 1 sowie 4A und 4B zu entnehmen. Von der Füllöffnung 41 erstreckt sich tangential nach außen ein Füllstutzen 78, der bis zu seinem Flansch 79 in eine kreisrunde Querschnittsform übergeht. An den Flansch 79 ist eine rohrförmige Stopfschnecke 80 angeschlossen mit der die Naßschnitzel unter Druck in Richtung des Pfeils 81 zugeführt werden.2, the circular arc shape of the filling opening 41 between an outer end point of the connecting part 40 and a point 77 can be seen in the plan view. The rectangular shape of the filling opening 41 in the side view can be seen in FIGS. 1 and 4A and 4B. A filler neck 78 extends tangentially outward from the fill opening 41 and merges into a circular cross-sectional shape up to its flange 79. A tubular stuffing screw 80 is connected to the flange 79 and is used to supply the wet chips under pressure in the direction of the arrow 81.

Fig. 3 zeigt, wie das Schraubenteil 39 und das Verbindungsteil 40 einerseits aneinander und andererseits an der Ringwand 34 durch Schweißung dicht befestigt sind. Es sind auch zwei der Stegbleche 35 oberhalb des Schraubenteils 39 zu erkennen.3 shows how the screw part 39 and the connecting part 40 are tightly fastened to one another on the one hand and to the ring wall 34 on the other hand by welding. Two of the web plates 35 above the screw part 39 can also be seen.

Gemäß den Fig. 4A und 4B ist innen an die Ringwand 34 ein sich radial nach innen erstreckender Versteifungsring 82 angeschweißt. Die Durchbrechungen 47 in dem Spindelkörper 29 beginnen von der Ebene der Verdichterschaufein 25 an abwärts. Desgleichen ist der Siebmantel 23 mit Löchern 83 für den Durchlaß ausgepreßter Flüssigkeit erst von den Verdichterschaufeln 25 an abwärts versehen. Kondensat, das sich oberhalb des Schraubenteils 39 bildet, kann durch Entwässerungslöcher 84 in der Ringwand 34 und Entwässerungslöcher 85 in dem Siebmantel 23 ablaufen, die jeweils unmittelbar oberhalb des Schraubenteils 39 vorgesehen sind. Das Kondensat läuft dann einerseits in den keilförmigen Ringraum 37 und andererseits in den ersten Ringraum 24.4A and 4B, a radially inwardly extending stiffening ring 82 is welded to the inside of the ring wall 34. The openings 47 in the spindle body 29 start from the plane of the compressor blades 25 downwards. Likewise, the screen jacket 23 is provided with holes 83 for the passage of squeezed liquid only from the compressor blades 25 downwards. Condensate, which forms above the screw part 39, can drain through drainage holes 84 in the ring wall 34 and drainage holes 85 in the screen jacket 23, which are each provided directly above the screw part 39. The condensate then runs on the one hand into the wedge-shaped annular space 37 and on the other hand into the first annular space 24.

Gemäß Fig. 5 befinden sich weitere Entwässerungslöcher 86 unmittelbar oberhalb der Ringdichtung 36 in dem Spindelkörper 29 und als Fortsetzung in einem außen auf den Spindelkörper 29 aufgeschweißten Tragring 87 für die Ringdichtung 36. Die Ringdichtung 36 besteht aus dem unter dem Warenzeichen Teflon bekannten Kunststoff und ist unten schwalbenschwanzartig in den Tragring 87 eingebettet und mit Senkschrauben 88 an dem Tragring 87 festgelegt. Die Ringdichtung 36 gleitet außen auf einem Gleitring 89 aus nicht rostendem Stahl, der unten und innen in die Ringwand 34 eingeschweißt ist. Kondensat, das sich in dem keilförmigen Ringraum 37 sammelt, kann drucklos durch die Entwässerungslöcher 86 in den Innenraum 51 abfließen.5, there are further drainage holes 86 immediately above the ring seal 36 in the spindle body 29 and as a continuation in a support ring 87 for the ring seal 36 welded onto the outside of the spindle body 29. The ring seal 36 consists of the plastic known under the trademark Teflon and is embedded in the dovetail like below in the support ring 87 and fixed with countersunk screws 88 on the support ring 87. The ring seal 36 slides on the outside on a sliding ring 89 made of stainless steel, which is welded into the ring wall 34 below and inside. Condensate that collects in the wedge-shaped annular space 37 can flow without pressure through the drainage holes 86 into the interior 51.

Fig. 6 zeigt Einzelheiten des oberen Endes des Oberteils 3. An den Spritzmantel 22 ist oben ein Montageflansch 90 angeschweißt.6 shows details of the upper end of the upper part 3. A mounting flange 90 is welded to the spray jacket 22 at the top.

Die in dem bisherigen Figuren dargestellte Ausführungsform der Spindelpresse 1 funktioniert wie folgt : Beim Anfahren werden Naßschnitzel durch die Stopfschnecke 80 gemäß Fig. 2 und den Füllstutzen 78 der Füllöffnung 41 zugeleitet, durch die hindurch die Naßschnitzel nach unten hin in den zweiten Ringraum 33 fallen. Der Stauring 70 (Fig. 1) verhindert, daß die Schnitzel durch den Auslaßringspalt 71 hindurch gleich in den Ringraum 72 fallen. Bei sich drehender Preßspindel 18 füllt sich der zweite Ringraum 33 mehr und mehr mit Schnitzelgut, bis dieses die Unterseite der schraubenartig ausgebildeten Stirnwand 38 erreicht. Von diesem Augenblick an beginnt bei fortgesetztem Umlauf der Preßspindel 18 eine mechanische Verdichtung der Naßschnitzel in dem zweiten Ringraum 33 oberhalb der Verdichterschaufeln 25. Das zunehmende und schließlich vollständige Füllen des zweiten Ringraums 33 mit Naßschnitzeln kann durch die Beobachtungsöffnungen 13 und die damit fluchtenden Beobachtungsfenster 48 sowie durch die Beobachtungsfenster 49 verfolgt werden. Durch den Schraubenteil 39 findet, unterstützt durch das Überfördern durch die Stopfschnecke 80 eine erhebliche Drucksteigerung der Naßschnitzel oberhalb der Verdichterschaufeln 25 statt. Diese Vorverdichtung wird noch unterstützt und gesteigert durch die Verdichterschaufeln 25, bevor das so vorverdichtete abzupressende Schnitzelgut vorbei an den obersten Aufhaltem 28 in den Wirkungsbereich der obersten Schneckenflügel 69 gerät und durch diese und den sich nach unten zunehmend verjüngenden zweiten Ringraum 33 zunehmend verdichtet und entwässert wird. Die ausgepreßte Flüssigkeit tritt sowohl nach außen hin in den ersten Ringraum 24 des Gehäuses 2 als auch in den Innenraum 51 des Spindelkörpers 29 und fließt in beiden Fällen durch die Entwässerungsvorrichtung 32 ab. Die Preßschnitzel erreichen durch diese besondere Druckbehandlung und Verdichtung am Auslaßringspalt 71 eine besonders hohe Trockensubstanz. Dies ist auch darauf zurückzuführen, daß in dem der schraubenartig ausgebildeten Stimwand 38 gegenüberliegenden Bereich des Siebmantels 23 keine Löcher für den Durchlaß abgepreßter Flüssigkeit vorhanden sind. Dies fördert die Drucksteigerung in dieser Vorverdichtungszone.The embodiment of the screw press 1 shown in the previous figures works as follows: When starting up, wet chips are fed through the stuffing screw 80 according to FIG. 2 and the filler neck 78 of the filling opening 41, through which the wet chips fall down into the second annular space 33. The retaining ring 70 (FIG. 1) prevents the chips from immediately falling into the annular space 72 through the outlet annular gap 71. When the press spindle 18 rotates, the second annular space 33 fills more and more with chips until it reaches the underside of the screw-like end wall 38. From that moment on starts at continued circulation of the press spindle 18, mechanical compression of the wet chips in the second annular space 33 above the compressor blades 25. The increasing and finally complete filling of the second annular space 33 with wet chips can be followed through the observation openings 13 and the observation windows 48 aligned therewith, and through the observation windows 49 . The screw part 39, supported by the overfeed through the stuffing screw 80, causes a considerable increase in pressure of the wet chips above the compressor blades 25. This pre-compression is further supported and increased by the compressor blades 25 before the chip material to be pressed, which is pre-compressed in this way, passes the uppermost holdings 28 into the area of action of the uppermost screw vanes 69 and is increasingly compressed and dewatered by this and the second annular space 33, which tapers increasingly downward . The squeezed liquid flows both outwards into the first annular space 24 of the housing 2 and into the interior 51 of the spindle body 29 and flows out through the dewatering device 32 in both cases. Due to this special pressure treatment and compression at the outlet ring gap 71, the press chips achieve a particularly high dry substance. This is also due to the fact that there are no holes for the passage of squeezed liquid in the area of the screen jacket 23 opposite the screw-shaped end wall 38. This promotes the increase in pressure in this precompression zone.

In allen Ausführungsbeispielen sind gleiche Teile mit gleichen Bezugszahlen versehen. In Fig. 7 weist die Spindelpresse eine weitere Füllöffnung 91 auf, die diametral gegenüberliegend zu der Füllöffnung 41 angeordnet ist. An die weitere Füllöffnung 91 ist ein tangentialer.In all exemplary embodiments, identical parts are provided with the same reference numbers. In FIG. 7, the screw press has a further filling opening 91 which is arranged diametrically opposite the filling opening 41. There is a tangential to the further filling opening 91.

Füllstutzen 92 angeschlossen, der durch eine rohrförmige Stopfschnecke 93 in Richtung eines Pfeils 94 mit Naßschnitzeln versorgt wird. Das Schraubenteil 39 erstreckt sich in Fig. 7 nur in der Umlaufrichtung 43 über 180° von dem Verbindungsteil 40 bis zu einem weiteren Verbindungsteil 95, das diametral zu dem Verbindungsteil 40 angeordnet ist. Von einem einlaßseitigen Ende des weiteren Verbindungsteils 95 erstreckt sich in der Umlaufrichtung 43 ein weiteres Schraubenteil 96 bis zu einem auslaßseitigen Ende des Verbindungsteils 40. In Fig. 7 bilden die Schraubenteile 39 und 96 gewissermaßen ein «zweigängiges Gewinde ». Es können auch noch mehr als die beiden Füllöffnungen 41 und 91 an dem Oberteil 3 vorgesehen sein. Entsprechend « vielgängig » würde dann die schraubenartig ausgebildete Stirnwand 38. Durch diese « Mehrgängigkeit » läßt sich eine gleichmäßigere Drucksteigerungsverteilung über den Umfang der Spindelpresse 1 erreichen.Filler neck 92 connected, which is supplied by a tubular stuffing screw 93 in the direction of an arrow 94 with wet chips. The screw part 39 extends in FIG. 7 only in the direction of rotation 43 over 180 ° from the connecting part 40 to a further connecting part 95, which is arranged diametrically to the connecting part 40. A further screw part 96 extends in the circumferential direction 43 from an inlet-side end of the further connecting part 95 to an outlet-side end of the connecting part 40. In FIG. 7, the screw parts 39 and 96 form a "two-start thread" to a certain extent. It is also possible to provide more than the two filling openings 41 and 91 on the upper part 3. The screw-like end wall 38 would then be correspondingly "versatile". This "multiple movement" enables a more uniform distribution of pressure increase over the circumference of the screw press 1 to be achieved.

Gemäß Fig. 8 weist die Stirnwand 38, die in der zuvor beschriebenen Weise « eingängig oder «mehrgängig» ausgebildet sein kann und je « Gang » mit einem in Fig. 8 nicht gezeichneten Verbindungsteil versehen ist, innen einen schraubenartigen Gleitring 97 auf. Der Gleitring 97 erstreckt sich auch entlang des wenigstens einen, in Fig. 8 nicht gezeichneten Verbindungsteils und steht in radialer Dichtberührung mit einer zumindest außen kreiszylindrischen Dichtungsmanschette 98. Die Dichtungsmanschette 98 ist mit Senkschrauben 99 an einem einlaßseitigen Teil des Spindelkörpers 29 befestigt und erstreckt sich in axialer Richtung über den gesamten « Hub der Stirnwand 38. Die Dichtungsmanschette 98 kann aus dem unter dem Warenzeichen Teflon bekannten Kunststoff bestehen.According to FIG. 8, the end wall 38, which can be configured as “single-start or“ multi-start ”in the manner described above and is provided with a connecting part not shown in FIG. The slide ring 97 also extends along the at least one connecting part, not shown in FIG. 8, and is in radial sealing contact with an at least externally circular-cylindrical sealing sleeve 98. The sealing sleeve 98 is fastened with countersunk screws 99 to an inlet-side part of the spindle body 29 and extends into axial direction over the entire stroke of the end wall 38. The sealing sleeve 98 can consist of the plastic known under the trademark Teflon.

Fig. 9 zeigt eine andere Ausführungsform der Spindelpresse 1, bei der die Stimwand 38 innen eine schraubenartige Dichtungsleiste 100 trägt, die z. B. aus dem unter dem Warenzeichen Teflon bekannten Kunststoff besteht. Die Dichtungsleiste 100 erstreckt sich auch entlang der inneren Kante des wenigstens einen, in Fig. 9 nicht gezeichneten Verbindungsteils der Stimwand 38 und ist mit Senkschrauben 101 an einem achsparallelen, schraubenartigen Blech 102 der Stirnwand 38 festgelegt. Die Dichtungsleiste 100 steht in Dichtberührung mit einer kreiszylindrischen Außenfläche 103 am einlaßseitigen Ende des Spindelkörpers 29.Fig. 9 shows another embodiment of the screw press 1, in which the end wall 38 carries a screw-like sealing strip 100 on the inside, which, for. B. consists of the plastic known under the trademark Teflon. The sealing strip 100 also extends along the inner edge of the at least one connecting part, not shown in FIG. 9, of the end wall 38 and is fixed with countersunk screws 101 to an axially parallel, screw-like plate 102 of the end wall 38. The sealing strip 100 is in sealing contact with a circular cylindrical outer surface 103 at the end of the spindle body 29 on the inlet side.

Claims (15)

1. Screw press (1) for pressing out liquid from matter such as for example sugar beet cossettes, comprising a press screw (18) mounted at its ends for rotation within a housing (2) and rotatably drivable by a driving device (21), in which the housing (2) includes an outer sleeve (22) and a sieve sleeve (23) arranged inwardly of the outer sleeve (22), in which a first annular chamber (24) is provided between the outer sleeve (22) and the sieve sleeve (23) for the receipt of liquid, in which the press screw (18) comprises a hollow screw member (29) encompassing an internal chamber (51) for the receipt of liquid and provided with holes (47) therethrough for the liquid, in which between the housing (2) and the screw member (29) there is a second annular chamber (33) into which issues at the machine-inlet end (30) of the screw press (1) at least one circumferentially positioned intake port (41 ; 91) of a filler device for charging the press with matter to be pressed, said second annular chamber at the machine-outlet-end (31) of the screw press (1) having an annular outlet passage (71) for the deliquified matter, in which the screw member (29) carries external worm vanes (69) extending at least approximately into contact with the sieve sleeve (23), in which the second annular chamber (33) at the machine-inlet end (30) is delimited by a head wall (38) which extends transversely to the longitudinal axis (15) of the screw press (1), which is sealed off at the inside from the screw member (29) and which is sealingly secured at the outside to the housing (2), characterised in that the head wall (38) is helicoidal oppositely to the course of the worm vanes (69), and in that the beginning of the worm vanes (69) is axially behind the machine-outlet-side (31) end of the head wall (38).
2. Screw press according to claim 1, characterised in that a helical portion (39 ; 96) of the head wall (38) extends from an axially-outer, machine-inlet-end edge (42) of each intake port (41 ; 91) in the direction of rotation (43) of the press screw to an axially-inner, machine-outlet-end edge (44) of the said intake port or ports (41 ; 91) or to an adjacent intake port (91 ; 41) in the direction of rotaiton (43) of the press screw (18), in that a machine-inlet-end starting edge (45) of each head wall helical portion (39; 96) is sealingly connected by a connecting portion (40 ; 95) to a machine-outlet-end finishing edge (46) of the said helical portion (39 ; 96) or of a helical portion (96 ; 39) which is adjacent in the direction of rotation (43), and in that each head wall connecting portion (40 ; 95) is sealed off at the inside from the screw member (29) and is sealingly connected at the outside to the housing (2).
3. Screw press according to claim 2, characterised in each head wall helical portion (39 ; 96) and each connecting portion (40 ; 95) is sealingly connected at the outside to the sieve sleeve (23) of the housing (2).
4. Screw press according to claim 3, characterised in that the sieve sleeve (23) has no holes for the passage therethrough of expressed liquid at least in an axial zone thereof with is positioned opposite the head wall (38).
5. Screw press according to claim 4, characterised in that the sieve sleeve (23) is provided at the machine-inlet-end (30) with drainage holes (85) for condensate which issues from the head watt (38) into said first annular chamber (24).
6. Screw press according to one of claims 1 to 5, characterised in that the head wall (38) is sealingly secured at its inner margin to an annular wall (34), in that the annular wall (34) encircles the machine-inlet-side (30) end of the screw member (29), and in that the annular wall (34) towards the machine-outlet end (31) is sealed off from the screw member (29) by a ring seal (36).
7. Screw press according to one of claims 1 to 5, characterised in that the head wall (38) at its inner margin is sealed off directly from the screw member (29).
8. Screw press according to claim 7, characterised in that the head wall (38) at its inner margin is provided with a helical slide ring (97), and in that the slide ring (97) is in sealing contact with a sealing collar (98) on a machine-inlet-end (30) part of the screw member (29), said collar being circular cylindrical in shape at least on the outside.
9. Screw press according to -claim 8, characterised in that the sealing collar (98) and the machine-inlet-end (30) part of the screw member (29) are circular cylindrical.
10. Screw press according to claim 7, characterised in that the head wall (38) on its inner margin carries a helicoidal sealing rib (100), and in that the sealing rib (100) is in sealing contact with a circular cylindrical external surface (103) of the screw member (29).
11. Screw press according to one of claims 1 to 10, characterised in that the screw member (29), at least in one transverse plane, carries compression vanes (25) within the boundaries defined by the machine-outlet-side (31) end of the head wall (38) and before the beginning of the worm vanes (69), said compression vanes extending outwardly at least approximately into contact with the sieve sleeve (23).
12. Screw press according to one of claims 4 to 11, characterised in that the screw member (29) is provided with holes (47) therethrough for the passage of expressed liquid only from the machine-outlet-side (31) end of the head wall (38) in the direction towards the outlet end (31).
13. Screw press according to claim 12, characterised in that the holes (83) in the sieve sleeve (23) and the holes (47) in the screw member (29) begin in the region of the compression vanes (25).
14. Screw press according to any one of claims 1 to 13, characterised in that the filler device includes at least one packing conveyor (80 ; 93).
15. Screw press according to claim 14, characterised in that each packing conveyor (80 ; 93) is connected to be tangential to the second annular chamber (33) at the associated intake port (41 ; 91).
EP87907320A 1986-12-03 1987-11-04 Screw press Expired EP0293409B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87907320T ATE47089T1 (en) 1986-12-03 1987-11-04 SPINDLE PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3641248 1986-12-03
DE19863641248 DE3641248A1 (en) 1986-12-03 1986-12-03 SPINDLE PRESS

Publications (2)

Publication Number Publication Date
EP0293409A1 EP0293409A1 (en) 1988-12-07
EP0293409B1 true EP0293409B1 (en) 1989-10-11

Family

ID=6315334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87907320A Expired EP0293409B1 (en) 1986-12-03 1987-11-04 Screw press

Country Status (12)

Country Link
US (1) US4901636A (en)
EP (1) EP0293409B1 (en)
AT (1) ATE47089T1 (en)
BG (1) BG48209A3 (en)
DD (1) DD264646A5 (en)
DE (2) DE3641248A1 (en)
ES (1) ES2005714A6 (en)
NO (1) NO165666C (en)
RO (1) RO102682B1 (en)
SU (1) SU1831432A3 (en)
WO (1) WO1988004232A1 (en)
YU (1) YU214587A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0479983A (en) * 1990-07-23 1992-03-13 Brother Ind Ltd Displaying device for guide to sewing operation of sewing machine
US8025156B2 (en) * 2009-06-16 2011-09-27 Tapp Floyd G Method and apparatus for separating and dewatering slurries
AT515482B1 (en) * 2014-03-14 2016-03-15 Andritz Ag Maschf screw Press

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE95086C (en) *
DE65165C (en) * R. BERGREEN in Roitzsch bei Bitterfeld Schnitzel press
US1354528A (en) * 1916-12-22 1920-10-05 Larrowe Milling Company Pulp-press
US2664814A (en) * 1948-02-21 1954-01-05 Jackson & Church Company Pulp press
LU32627A1 (en) * 1953-01-16
US2709957A (en) * 1953-01-16 1955-06-07 Jackson & Church Company Screen and frame structure with frame functioning as a torque tube
US2775191A (en) * 1954-02-08 1956-12-25 Hawaiian Pineapple Co Ltd Press
GB803216A (en) * 1956-11-06 1958-10-22 Landsverk Ab Improvements in or relating to vertical screw presses for pressing liquid from vegetable material
US3426677A (en) * 1966-09-20 1969-02-11 Wascon Systems Inc Screw press
US3478679A (en) * 1967-05-24 1969-11-18 Stearns Roger Corp Pulp deliquifying press
DE2160585C3 (en) * 1971-12-07 1974-05-16 Lajos 4300 Essen Alfoeldi Schnitzel press with a central infeed
DE2364292A1 (en) * 1973-12-22 1975-07-03 Salzgitter Maschinen Ag CHIP PRESS
FR2258259A1 (en) * 1974-01-21 1975-08-18 Coq France Wine making screw press with pumped infeed - for continuous process offering higher quality than gravity or worm in feed
DE2641597A1 (en) * 1976-09-16 1978-03-30 Selwig & Lange Maschf Worm press for fibrous materials - has sieve jacket with interrupted worm blades driven in opposite directions

Also Published As

Publication number Publication date
NO165666C (en) 1991-03-20
RO102682B1 (en) 1993-03-01
SU1831432A3 (en) 1993-07-30
DE3641248A1 (en) 1988-07-28
NO883425D0 (en) 1988-08-02
YU214587A (en) 1990-10-31
NO883425L (en) 1988-08-02
US4901636A (en) 1990-02-20
DD264646A5 (en) 1989-02-08
EP0293409A1 (en) 1988-12-07
BG48209A3 (en) 1990-12-14
WO1988004232A1 (en) 1988-06-16
DE3760717D1 (en) 1989-11-16
NO165666B (en) 1990-12-10
ES2005714A6 (en) 1989-03-16
ATE47089T1 (en) 1989-10-15

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