(19)
(11)EP 1 931 878 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
22.07.2020 Bulletin 2020/30

(21)Application number: 06794100.5

(22)Date of filing:  03.10.2006
(51)International Patent Classification (IPC): 
F04C 2/107(2006.01)
F04D 29/10(2006.01)
F04C 15/00(2006.01)
(86)International application number:
PCT/FI2006/000324
(87)International publication number:
WO 2007/039666 (12.04.2007 Gazette  2007/15)

(54)

Pump with a gasket part

Pumpe mit einem Dichtungsteil

Pumpe avec un joint d'etancheite


(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

(30)Priority: 03.10.2005 FI 20050992
01.12.2005 FI 20051230

(43)Date of publication of application:
18.06.2008 Bulletin 2008/25

(73)Proprietor: Flowrox Oy
53600 Lappeenranta (FI)

(72)Inventor:
  • FORSSTRÖM, Jussi
    FI-46810 Anjalankoski (FI)

(74)Representative: Papula Oy 
P.O. Box 981
00101 Helsinki
00101 Helsinki (FI)


(56)References cited: : 
DE-A1- 1 403 912
US-A- 2 931 302
US-A- 3 712 765
US-A- 6 010 321
US-B1- 6 244 842
US-A- 2 412 588
US-A- 3 263 620
US-A- 5 769 618
US-B1- 6 227 829
US-B1- 6 461 115
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    FIELD OF THE INVENTION



    [0001] The present invention relates to a pump defined in claim 1, a method defined in claim 9 for detaching the gasket part from the pump.

    BACKGROUND OF THE INVENTION



    [0002] Various mechanical gaskets to be used in pumps about the drive shaft are known from prior art.

    [0003] In addition, known from prior art are various screw pumps which use mechanical gaskets. There are typically screw pumps with one, two or three screws. In screw pumps, the substance to be pumped is sucked inside from the suction side and directed out from the pressure side. A drive screw is used to achieve a pressure difference between the suction and pressure side. One known and largely used screw pump type is an eccentric screw pump, specifically used in the transfer of thick fiber suspensions and thick masses.

    [0004] Depending on the direction of rotation of the bearing part, which attaches the pump body to the power unit, and that of the pump, the mechanical gasket between the suction or pressure side wears in use and must be changed at intervals to maintain the sealing of the pump. To change a gasket is nowadays a slow process because the bearing part of the pump must first be detached from the power unit. Thereafter, the joint between the bearing part and the suction or pressure space must be opened and the drive shaft completely detached, and only then one gets the chance to change the mechanical gasket. This is also expensive considering the time consumed by the shutdown of the process, the disassembly of the pump and change of the gasket.

    [0005] From US 6461115 is known a pumping system comprising the features of the preamble of claim 1. From US 3712765 is known a rubber impeller pump including an annular seal. From US 6010321 is known a hydraulic motor and spindle with improved spindle bearing lubrication. From US 6227829 is known an eccentric screw pump. From US6461115 is known a hydraulic pump.

    OBJECTIVE OF THE INVENTION



    [0006] It is an objective of the invention to eliminate the disadvantages referred to above. One specific objective of the invention is to disclose a novel, better, and easier-to use gasket part, and a gasket arranged in conjunction therewith to be used in pumps. Moreover, it is an objective of the invention to disclose an easy and fast method for changing the gasket.

    SUMMARY OF THE INVENTION



    [0007] The pump in accordance with the invention, and the method for detaching a gasket part from the pump are characterized by what is described in the claims.

    [0008] The invention is based on a pump comprising a bearing part and a drive shaft which is arranged through the bearing part. The drive shaft comprises more than one part. The pump comprises a gasket part in conjunction with the bearing part. At its first part, the bearing part of the pump is connected to the end of the suction or pressure space, depending on the direction of rotation of the pump, and at its second part, to the power unit. Arranged through the bearing part is a drive shaft by means of which the driving output of the power unit is transferred to the drive of the pump. According to the invention, the drive shaft comprises at least three parts and the gasket part includes a mechanical gasket and a detachable part of the drive shaft, which detachable part can be arranged substantially in conjunction with the bearing part and can be detachably connected between the second parts of the drive shaft. The mechanical gasket, which, depending on the direction of rotation of the bearing part and the pump, is a gasket of the connecting point between the suction or pressure space, is arranged in conjunction with the detachable part of the drive shaft. Preferably, the mechanical gasket is arranged to encircle the detachable part of the drive shaft. The detachable part of the drive shaft includes means for arranging it to be compacted in the longitudinal direction of the drive shaft. The gasket part includes a flexible additional gasket arranged to be flexible in the longitudinal direction of the drive shaft and adapted to protect the means for arranging the detachable part of the drive shaft so as to be compacted. The means for arranging the detachable part to be compacted includes a first part and a second part, of which the first part can be accommodated within the second part when arranging the detachable part of the drive shaft so as to be compacted.

    [0009] The gasket part for the pump of the invention achieves good sealing and prevents the substance to be pumped as well as dirt from accessing the bearing part and the power unit.

    [0010] Herein, the bearing part of the pump means, depending on the direction of rotation of the power unit and the pump, a part between the suction or pressure space.

    [0011] The drive shaft is formed from at least three parts; a first one, a second one, and a third one, detachably connected to one another. The detachable part of the drive shaft; that is, the second part is arranged between the first and third part and substantially in conjunction with the bearing part, and arranged to be detached from the first and third part.

    [0012] The means for arranging the detachable part to be compacted include a first part and a second part, adapted to move in such a manner with respect to one another that the first part can be accommodated within the second part when arranging the detachable part of the drive shaft to be compacted.

    [0013] In one embodiment, depending on the direction of rotation of the pump, the detachable part of the drive shaft extends to a distance, onto the side of the suction or pressure space of the pump, through the flange joint of the bearing part and the suction/pressure space.

    [0014] In one embodiment of the invention, the gasket part includes means by which the mechanical gasket can be moved along the detachable part of the drive shaft in the longitudinal direction of the drive shaft. In one embodiment of the invention, the mechanical gasket can be latched to a desired position in the detachable part of the drive shaft by at least one latching means. In one embodiment, the mechanical gasket is connected to the detachable part of the drive shaft, for example, with screws, bolts or the like, which are opened before moving the gasket.

    [0015] According to the invention, the mechanical gasket is arranged in conjunction with the detachable part of the drive shaft and against the joint between the suction/pressure space and the bearing part and not between the joint.

    [0016] Preferably, the mechanical gasket is arranged to such a position in the detachable part of the drive shaft that when arranging the gasket part so as to go within the bearing part, the gasket presses against the flange joint between the pressure or suction space, depending on the direction of rotation of the bearing part and the pump.

    [0017] In one embodiment of the invention, the detachable part of the drive shaft is connected to the second parts by connecting means, such as connectors, screws, bolts, flanges, combinations of these, or the like. Preferably, arranged at both ends of the detachable part of the drive shaft are connecting means, such as combinations of a flange/screw, to connect the detachable part of the drive shaft to the second parts of the drive shaft.

    [0018] According to the invention, the gasket part includes a flexible additional gasket which is arranged to be flexible in the longitudinal direction of the drive shaft and adapted to protect the means for arranging the detachable part of the drive shaft to be compacted. In one embodiment, the flexible additional gasket is arranged in a bellows-like shape. Preferably, the length of the flexible additional gasket is adapted so that the detachable part of the drive shaft, which is to be arranged to be compacted, can be moved through its entire length from a minimum length to a maximum length.

    [0019] In one embodiment of the invention, the flexible additional gasket is placed between the first end of the detachable part of the drive shaft and the mechanical gasket. In another embodiment, the flexible additional gasket is placed between the first end of the detachable part of the drive shaft and the first end of the second part of the compacting means. The additional gasket can be connected to the gasket part by connecting means known per se.

    [0020] The flexible additional gasket may have been formed from any durable material suitable for the purpose.

    [0021] A flexible additional gasket prevents the substance to be pumped as well as dirt from accessing the area of the compacting means of the detachable part of the drive shaft, thereby maintaining the compressibility irrespective of the conditions and the substance being pumped.

    [0022] In one embodiment of the invention, the mechanical gasket comprises at least one sealing ring, such as an O ring seal, adapted to encircle the detachable part of the drive shaft to achieve sealing.

    [0023] In a preferred embodiment, the mechanical gasket included in the gasket part is so selected that the inner surface of the gasket encircles the part of the drive shaft suitably tightly. Preferably, the sealing ring is placed in a groove arranged in conjunction with the inner surface of the gasket.

    [0024] Further, the invention concerns a method for detaching a gasket part for a pump as described above. In the method, the latching of the gasket is opened; the detachable part of the drive shaft is detached from the other parts, and the detachable part of the drive shaft is arranged to be compacted. Similarly, the gasket part of the pump is put in place in a corresponding manner, but in reverse order.

    [0025] In one embodiment of the invention, the gasket is moved along the detachable part of the drive shaft to a desired position in the longitudinal direction of the drive shaft.

    [0026] In a preferred embodiment, arranged in the outer housing of the bearing part is an opening via which the detachable part of the drive shaft together with the mechanical gasket can be detached from the other parts of the drive shaft, and can be arranged to be compacted in the longitudinal direction and taken out of the bearing part, and via which the detachable part of the drive shaft together with the gasket can be accommodated within the bearing part, and can be arranged to assume a normal size in the longitudinal direction and attached to the other parts of the drive shaft. In one embodiment, the opening arranged in the outer housing of the bearing part can be closed when necessary.

    [0027] When the detachable part of the drive shaft together with the mechanical gasket is taken out of the pump body, the gasket is usually changed or replaced. The gasket can also be repaired and cleansed only. The detachable part of the drive shaft is changed less frequently, although due to the structure in accordance with the invention it is also possible.

    [0028] In one embodiment of the invention, the detachable part of the drive shaft is detached from the other parts of the drive shaft prior to arranging the detachable part of the drive shaft to be compacted. In one embodiment, the detachable part of the drive shaft is detached from one part of the drive shaft prior to arranging the detachable part of the drive shaft to be compacted, and then the detachable part of the drive shaft is detached from the other part of the drive shaft.

    [0029] In one embodiment, the power unit to be attached to the pump is an electric motor or some other actuator. The drive shaft is rotated by means of the power unit, thereby transmitting the driving output of the pump to the drive screw or rotor. While rotating, the drive screw or rotor delivers the substance to be pumped from the suction side to the pressure side.

    [0030] The gasket part for a pump in accordance with the invention is used in conjunction with pumps, preferably screw pumps, more preferably in conjunction with eccentric screw pumps. Advantages of eccentric pumps include non-pulsating flow and low shear.

    [0031] The gasket part of the invention enables fast, inexpensive and simple change of the gasket in a pump without the need for disassembling the pump body or detaching the power unit. Thanks to the invention, the maintenance time is made shorter and the maintenance costs are also reduced.

    [0032] Further, the invention has the advantage that the mechanical gasket and the part of the drive shaft can be arranged to form one whole, making the changeable part of the pump easier to handle. In that case, the structure of the mechanical gasket can be made more simple and better. For example, the part of the gasket that is pressed against the flange between the bearing part and the suction/pressure space can be reduced, thereby also reducing the manufacturing costs.

    [0033] The gasket part of the invention is applicable to be used in any target of use and conditions in pumps designed for the pumping of various fluids, suspensions, rigid masses or the like, for example, in paper and pulp industry, treatment of waste waters, as well as in various processes of chemical industry.

    LIST OF FIGURES



    [0034] In the following section, the invention will be described by means of detailed examples of its embodiments with reference to the accompanying drawings, in which

    Fig. 1 is a cross-sectional view illustrating one gasket part for a pump in accordance with the invention; and

    Fig. 2 is a side view illustrating one gasket part for a pump in accordance with the invention.


    DETAILED DESCRIPTION OF THE INVENTION



    [0035] Fig. 1 is a longitudinal cross-sectional view of the structure of a gasket part for an eccentric screw pump, according to the invention, the gasket part being accommodated within the bearing part. Fig. 2 is a side view illustrating the gasket part of the invention.

    [0036] In the eccentric screw pump of Fig. 1, the bearing part 1 is attached by a flange joint at its first end to a suction space 13. Attached to the second part of the bearing part is an electric motor 14, from which the driving output of the power unit 14 is transmitted by a drive shaft 2 to a rotor placed within a screw channel. In the eccentric screw pump shown in the embodiment of Fig. 1, the substance to be pumped is sucked into the suction space of the pump through a suction inlet. From the suction space, the substance is introduced into the screw channel having at least one drive screw or rotor. From the screw channel, the substance is led through the outlet of the pressure side out of the pump into a space with a higher pressure.

    [0037] In the embodiment of Fig. 1, the drive shaft 2 is formed from a first 3, a second 4 and a third 5 part, joined to one another by screw/flange joints 9, 12 so that the second part 4 is disposed between the first 3 and the third part 5, and can be easily detached from the first 3 and the third 5 part. The connecting point 10 between the first 3 and the second 4 part is arranged substantially in the area of the connecting point 6 between the suction space 13 and the bearing part 1, extending to a distance onto the side of the suction space 13. The connecting point 11 between the second 4 and the third 5 part of the drive shaft is accommodated within the bearing part 1.

    [0038] The gasket part for a pump of the invention as shown in Figs. 1 and 2 includes a mechanical gasket 7 and a second part 4 of the drive shaft. The mechanical gasket 7 acts to seal the flange joint 6 between the bearing part 1 and the suction space 13. The mechanical gasket 7 is arranged to encircle the second part 4 of the drive shaft and so as to be pressed against the flange joint 6. The inner diameter of the mechanical gasket 7 is so selected that the inner surface of the gasket tightly encircles the second part 4 of the drive shaft. Arranged in the inner surface of the mechanical gasket 7 is a groove with an o ring seal to encircle the second part 4 of the drive shaft.

    [0039] The gasket part of the pump includes means (not shown in the figures) by which the mechanical gasket 7 is arranged to be moveable along the second part 4 of the drive shaft in the longitudinal direction of the drive shaft 2. Arranged in the second part 4 of the drive shaft is a slotted structure along which the gasket 7 can be moved. The gasket 7 can be secured by screws 15 to a desired and predetermined position in the second part 4. The screws are opened prior to moving the gasket.

    [0040] Structures of mechanical gaskets are known per se and are therefore not described in greater detail herein. In conjunction with the invention, it is possible to use any known gasket.

    [0041] The second part 4 of the drive shaft includes means 8 for arranging the detachable part 4 of the drive shaft to be compacted in the longitudinal direction. The means 8 include a first part 8a and a second part 8b, adapted to move with respect to one another so that the first part 8a can be placed within the second part 8b when arranging the detachable part 4 of the drive shaft to be compacted. The means 8 are disposed substantially on the side of the suction space 13. The means 8 include a slot/opposing piece structure by which the rotation of the first 8a and the second part 8b with respect to one another is prevented.

    [0042] The gasket part includes a flexible additional gasket 16 arranged in a bellows-like shape, arranged to be flexible in the longitudinal direction of the drive shaft 2 and adapted to protect the means 8. In the embodiment of the figures, the bellows-like additional gasket 16 is placed between the first end 17 of the detachable part 4 of the drive shaft and the first end 18 of the second part 8b of the compacting means.

    [0043] In the method of the invention, to detach the gasket part of the pump, the latching of the gasket 7 is first opened by unscrewing the screws 15. Then, the gasket 7 is moved along the second part 4 of the drive shaft to a desired position toward the power unit 14 in the longitudinal direction of the drive shaft. Thereafter, the second part 4 of the drive shaft is detached from the first part 3 of the drive shaft by opening the screw-flange joint 9; and the second part 4 of the drive shaft is arranged to be compacted by means 8 by opening the latching and by placing the first part 8a within the second part 8b. Finally, the second part 4 of the drive shaft is detached from the third part 5 of the drive shaft by opening the screw-flange joint 12. The gasket part of the pump is fastened in reverse order.

    [0044] In a preferred embodiment, arranged in the outer housing of the bearing part 1 of the pump is an opening via which the gasket part of the invention can be detached from the other parts 3 and 5 of the drive shaft and taken out of the bearing part, and via which the gasket part can be accommodated within the bearing part and attached to the other parts of the drive shaft.

    [0045] The embodiments of the invention are not limited to the examples referred to above; instead, they can vary within the scope of the accompanying claims.


    Claims

    1. A pump which comprises a bearing part (1) and a drive shaft (2) which is arranged through the bearing part, and the pump comprises a gasket part in conjunction with the bearing part, whereby the drive shaft (2) comprises at least three parts (3,4,5), and the gasket part includes a detachable part (4) of the drive shaft (2), which can be detachably coupled between the other parts (3, 5) of the drive shaft; the gasket part includes a mechanical gasket (7), and the mechanical gasket (7) is arranged in conjunction with the detachable part (4) of the drive shaft; and the detachable part (4) is to be arranged to be compacted in the longitudinal direction of the drive shaft and the detachable part (4) includes means (8) for arranging the detachable part to be compacted, and the said means (8) includes a first part (8a) and a second part (8b), of which the first part (8a) can be accommodated within the second part (8b) when arranging the detachable part (4) to be compacted; characterised in that the gasket part includes a flexible additional gasket (16) arranged to be flexible in the longitudinal direction of the drive shaft and adapted to protect the means (8) for arranging the detachable part (4) to be compacted.
     
    2. The pump as defined in claim 1, char- acterized in that the gasket part includes means by which the mechanical gasket (7) can be moved along the detachable part (4) of the drive shaft in the longitudinal direction of the drive shaft.
     
    3. The pump as defined in claim 1 or 2, characterized in that the mechanical gasket (7) can be latched to a desired position in the detachable part (4) of the drive shaft by at least one latching means (15).
     
    4. The pump as defined in any one of claims 1 - 3, characterized in that the detachable part (4) of the drive shaft is connected to the other parts (3, 5) by connecting means (9, 12).
     
    5. The pump as defined in any one of claims 1 - 4, characterized in that the flexible additional gasket (16) is arranged in a bellows-like shape.
     
    6. The pump as defined in any one of claims 1 - 5, characterized in that the flexible additional gasket (16) is placed between the first end (17) of the detachable part (4) of the drive shaft and the mechanical gasket (7).
     
    7. The pump as defined in any one of claims 1 - 6, characterized in that the flexible additional gasket (16) is placed between the first end (17) of the detachable part (4) of the drive shaft and the first end (18) of the second part (8b) of the compacting means.
     
    8. The pump as defined in any one of claims 1 - 7, characterized in that the mechanical gasket (7) includes at least one sealing ring, adapted to encircle the detachable part (4) of the drive shaft to achieve sealing.
     
    9. A method for detaching the gasket part from the pump as defined in any one of claims 1 - 8, characterized in that the latch of the gasket is opened; the detachable part (4) of the drive shaft is detached; and the detachable part of the drive shaft is arranged to be compacted.
     
    10. The method as defined in claim 9, characterized in that the mechanical gasket is moved along the detachable part of the drive shaft to a desired position in the longitudinal direction of the drive shaft.
     
    11. The method as defined in claim 9 or 10, characterized in that the detachable part of the drive shaft is detached from the other parts of the drive shaft prior to arranging the detachable part of the drive shaft to be compacted.
     
    12. The method as defined in any one of claims 9 - 11, characterized in that the detachable part of the drive shaft is detached from one part of the drive shaft prior to arranging the detachable part of the drive shaft to be compacted; and thereafter, the detachable part of the drive shaft is detached from the other part of the drive shaft.
     
    13. The pump as defined in any one of claims 1 - 8, characterized in that the pump is a screw pump, preferably an eccentric screw pump.
     
    14. The pump as defined in any one of claims 1 - 8 or 13, characterized in that the pump is a screw pump comprising a pump body and a power unit, the pump body comprising a suction space, a pressure space, a screw channel arranged between the suction space and pressure space, and depending on the direction of rotation of the pump, a bearing part (1) sealably attached to the one end of the suction or pressure space, by means of which bearing part (1) the pump body is attached to the power unit, and a drive shaft (2) by means of which the driving output of the power unit is transmitted to a drive screw arranged in the screw channel, and in which the drive shaft (2) is formed from at least three parts; a first one (3), a second one (4), and a third (5) one, detachably connected to one another; the second (4) part of the drive shaft is the gasket part of the pump and is arranged between the first (3) and the third (5) part and substantially in conjunction with the bearing part (1); the gasket part (4) of the pump is arranged to be detached from the first (3) and third (5) part; and arranged in the outer housing of the bearing part (1) is an opening via which the gasket part (4) of the pump can be detached from the first (3) and the third (5) part, and can be arranged so as to be compacted in the longitudinal direction and taken out of the bearing part, and via which the gasket part (4) of the pump can be accommodated within the bearing part, and can be arranged to assume a normal size in the longitudinal direction and attached to the first and third part of the drive shaft.
     


    Ansprüche

    1. Pumpe, die einen Lagerteil (1) und eine Antriebswelle (2), die durch den Lagerteil hindurch angeordnet ist, umfasst, und die Pumpe in Verbindung mit dem Lagerteil einen Dichtungsteil umfasst, wobei die Antriebswelle (2) zumindest drei Teile (3, 4, 5) umfasst und der Dichtungsteil einen lösbaren Teil (4) der Antriebswelle (2) aufweist, der zwischen den anderen Teilen (3, 5) der Antriebswelle lösbar gekoppelt sein kann; der Dichtungsteil eine mechanische Dichtung (7) aufweist, und die mechanische Dichtung (7) in Verbindung mit dem lösbaren Teil (4) der Antriebswelle angeordnet ist; und der lösbare Teil (4) anzuordnen ist, so dass er in der Längsrichtung der Antriebswelle verdichtet wird, und der lösbare Teil (4) ein Mittel (8) zum Anordnen des zu verdichtenden lösbaren Teils umfasst, und das Mittel (8) einen ersten Teil (8a) und einen zweiten Teil (8b) aufweist, von denen der erste Teil (8a) innerhalb des zweiten Teils (8b) untergebracht werden kann, wenn der zu verdichtende lösbare Teil (4) angeordnet wird; dadurch gekennzeichnet, dass der Dichtungsteil eine flexible Zusatzdichtung (16) aufweist, die angeordnet ist, um in der Längsrichtung der Antriebswelle flexibel zu sein, und ausgelegt ist, das Mittel (8) zum Anordnen des zu verdichtenden lösbaren Teils (4) zu schützen.
     
    2. Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass der Dichtungsteil ein Mittel aufweist, mit dem die mechanische Dichtung (7) entlang des lösbaren Teils (4) der Antriebswelle in der Längsrichtung der Antriebswelle bewegt werden kann.
     
    3. Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die mechanische Dichtung (7) in einer gewünschten Position in dem lösbaren Teil (4) der Antriebswelle durch zumindest ein Einrastmittel (15) eingerastet sein kann.
     
    4. Pumpe nach einem der Ansprüche 1-3, dadurch gekennzeichnet, dass der lösbare Teil (4) der Antriebswelle mit den anderen Teilen (3, 5) durch Verbindungsmittel (9, 12) verbunden ist.
     
    5. Pumpe nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass die flexible Zusatzdichtung (16) in einer faltenbalgartigen Form angeordnet ist.
     
    6. Pumpe nach einem der Ansprüche 1-5, dadurch gekennzeichnet, dass die flexible Zusatzdichtung (16) zwischen dem ersten Ende (17) des lösbaren Teils (4) der Antriebswelle und der mechanischen Dichtung (7) angeordnet ist.
     
    7. Pumpe nach einem der Ansprüche 1-6, dadurch gekennzeichnet, dass die flexible Zusatzdichtung (16) zwischen dem ersten Ende (17) des lösbaren Teils (4) der Antriebswelle und dem ersten Ende (18) des zweiten Teils (8b) des Verdichtungsmittels angeordnet ist.
     
    8. Pumpe nach einem der Ansprüche 1-7, dadurch gekennzeichnet, dass die mechanische Dichtung (7) zumindest einen Dichtungsring aufweist, der ausgelegt ist, den lösbaren Teil (4) der Antriebswelle zu umschließen, um Abdichtung zu erzielen.
     
    9. Verfahren zum Lösen des Dichtungsteils von der Pumpe nach einem der Ansprüche 1-8, dadurch gekennzeichnet, dass die Raste der Dichtung geöffnet wird; der lösbare Teil (4) der Antriebswelle gelöst wird; und der lösbare Teil der Antriebswelle angeordnet ist, um verdichtet zu werden.
     
    10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die mechanische Dichtung entlang des lösbaren Teils der Antriebswelle in eine gewünschte Position in der Längsrichtung der Antriebswelle bewegt wird.
     
    11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass der lösbare Teil der Antriebswelle von den anderen Teilen der Antriebswelle gelöst wird, bevor der zu verdichtende lösbare Teil der Antriebswelle angeordnet wird.
     
    12. Verfahren nach einem der Ansprüche 9-11, dadurch gekennzeichnet, dass der lösbare Teil der Antriebswelle von einem Teil der Antriebswelle gelöst wird, bevor der zu verdichtende lösbare Teil der Antriebswelle angeordnet wird; und danach der lösbare Teil der Antriebswelle von dem anderen Teil der Antriebswelle gelöst wird.
     
    13. Pumpe nach einem der Ansprüche 1-8, dadurch gekennzeichnet, dass die Pumpe eine Schneckenpumpe, vorzugsweise eine Exzenterschneckenpumpe, ist.
     
    14. Pumpe nach einem der Ansprüche 1-8 oder 13, dadurch gekennzeichnet, dass die Pumpe eine Schneckenpumpe ist, umfassend einen Pumpenkörper und eine Energieeinheit, wobei der Pumpenkörper einen Ansaugraum, einen Druckraum und einen zwischen dem Ansaugraum und dem Druckraum angeordneten Schneckenkanal umfasst, und in Abhängigkeit von der Drehrichtung der Pumpe, einen Lagerteil (1), der an dem einen Ende des Ansaug- oder Druckraumes abdichtend befestigt ist, mittels welches Lagerteils (1) der Pumpenkörper an der Energieeinheit befestigt ist, und eine Antriebswelle (2), mittels welcher die Antriebsleistung der Energieeinheit auf eine im Schneckenkanal angeordnete Antriebsschnecke übertragen wird, und in der die Antriebswelle (2) aus zumindest drei Teilen gebildet ist; einen ersten (3), einen zweiten (4) und einen dritten (5) Teil, die lösbar miteinander verbunden sind; der zweite (4) Teil der Antriebswelle der Dichtungsteil der Pumpe ist und zwischen dem ersten (3) und dem dritten (5) Teil und im Wesentlichen in Verbindung mit dem Lagerteil (1) angeordnet ist; der Dichtungsteil (4) der Pumpe angeordnet ist, um von dem ersten (3) und dem dritten (5) Teil gelöst zu werden; und in dem Außengehäuse des Lagerteils (1) eine Öffnung angeordnet ist, durch die der Dichtungsteil (4) der Pumpe von dem ersten (3) und dem dritten (5) Teil lösbar ist, und angeordnet sein kann, um in der Längsrichtung verdichtet und aus dem Lagerteil herausgenommen werden kann, und über den der Dichtungsteil (4) der Pumpe innerhalb des Lagerteils untergebracht sein kann, und angeordnet sein kann, um in der Längsrichtung eine normale Größe anzunehmen und an dem ersten und dritten Teil der Antriebswelle befestigt ist.
     


    Revendications

    1. Pompe qui comprend une partie de palier (1) et un arbre d'entraînement (2) qui est agencé à travers la partie de palier, et la pompe comprend une partie de garniture conjointement avec la partie de palier, en sorte que l'arbre d'entraînement (2) comprend au moins trois parties (3, 4, 5), et la partie de garniture inclut une partie détachable (4) de l'arbre d'entraînement (2), qui peut être accouplée de manière détachable entre les autres parties (3, 5) de l'arbre d'entraînement ; la partie de garniture inclut une garniture mécanique (7), et la garniture mécanique (7) est agencée conjointement avec la partie détachable (4) de l'arbre d'entraînement ; et la partie détachable (4) doit être agencée pour être comprimée dans la direction longitudinale de l'arbre d'entraînement et la partie détachable (4) inclut des moyens (8) pour agencer la partie détachable à comprimer, et lesdits moyens (8) incluent une première partie (8a) et une seconde partie (8b), dont la première partie (8a) peut être reçue à l'intérieur de la seconde partie (8b) lors de l'agencement de la partie détachable (4) à comprimer ; caractérisée en ce que la partie de garniture inclut une garniture supplémentaire souple (16) agencée pour être souple dans la direction longitudinale de l'arbre d'entraînement et adaptée pour protéger les moyens (8) d'agencement de la partie détachable (4) à comprimer.
     
    2. Pompe selon la revendication 1, caractérisée en ce que la partie de garniture inclut des moyens par lesquels la garniture mécanique (7) peut être déplacée le long de la partie détachable (4) de l'arbre d'entraînement dans la direction longitudinale de l'arbre d'entraînement.
     
    3. Pompe selon la revendication 1 ou 2, caractérisée en ce que la garniture mécanique (7) peut être verrouillée jusqu'à une position voulue dans la partie détachable (4) de l'arbre d'entraînement par au moins un moyen de verrouillage (15).
     
    4. Pompe selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la partie détachable (4) de l'arbre d'entraînement est reliée aux autres parties (3, 5) par des moyens de liaison (9, 12).
     
    5. Pompe selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la garniture supplémentaire souple (16) est agencée en une forme analogue à un soufflet.
     
    6. Pompe selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la garniture supplémentaire souple (16) est placée entre la première extrémité (17) de la partie détachable (4) de l'arbre d'entraînement et la garniture mécanique (7).
     
    7. Pompe selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la garniture supplémentaire souple (16) est placée entre la première extrémité (17) de la partie détachable (4) de l'arbre d'entraînement et la première extrémité (18) de la seconde partie (8b) des moyens de compression.
     
    8. Pompe selon l'une quelconque des revendications 1 à 7, caractérisée en ce que la garniture mécanique (7) inclut au moins une bague d'étanchéité, adaptée pour encercler la partie détachable (4) de l'arbre d'entraînement pour obtenir une étanchéité.
     
    9. Procédé pour détacher la partie de garniture de la pompe selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le verrou de la garniture est ouvert ; la partie détachable (4) de l'arbre d'entraînement est détachée ; et la partie détachable de l'arbre d'entraînement est agencée pour être comprimée.
     
    10. Procédé selon la revendication 9, caractérisé en ce que la garniture mécanique est déplacée le long de la partie détachable de l'arbre d'entraînement jusqu'à une position voulue dans la direction longitudinale de l'arbre d'entraînement.
     
    11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la partie détachable de l'arbre d'entraînement est détachée des autres parties de l'arbre d'entraînement avant d'agencer la partie détachable de l'arbre d'entraînement à comprimer.
     
    12. Procédé selon l'une quelconque des revendications 9 à 11, caractérisé en ce que la partie détachable de l'arbre d'entraînement est détachée d'une partie de l'arbre d'entraînement avant d'agencer la partie détachable de l'arbre d'entraînement à comprimer ; et ensuite, la partie détachable de l'arbre d'entraînement est détachée de l'autre partie de l'arbre d'entraînement.
     
    13. Pompe selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la pompe est une pompe à vis, de préférence une pompe à vis excentrique.
     
    14. Pompe selon l'une quelconque des revendications 1 à 8 ou 13, caractérisée ce que la pompe est une pompe à vis comprenant un corps de pompe et une unité de puissance, le corps de pompe comprenant un espace d'aspiration, un espace de refoulement, un canal de vis agencé entre l'espace d'aspiration et l'espace de refoulement, et selon le sens de rotation de la pompe, une partie de palier (1) attachée de manière étanche à l'extrémité de l'espace d'aspiration ou de refoulement, partie de palier (1) au moyen de laquelle le corps de pompe est attaché à l'unité de puissance, et un arbre d'entraînement (2) au moyen duquel la sortie d'entraînement de l'unité de puissance est transmise à une vis d'entraînement agencée dans le canal de vis, et dans lequel l'arbre d'entraînement (2) est formé à partir d'au moins trois parties ; une première (3), une deuxième (4) et une troisième (5), reliées les unes aux autres de manière détachable ; la deuxième (4) partie de l'arbre d'entraînement est la partie de garniture de la pompe et est agencée entre les première (3) et troisième (5) parties et pratiquement conjointement avec la partie de palier (1) ; la partie de garniture (4) de la pompe est agencée pour être détachée des première (3) et troisième (5) parties ; et dans le carter extérieur de la partie de palier (1) est agencée une ouverture via laquelle la partie de garniture (4) de la pompe peut être détachée des première (3) et troisième (5) parties, et peut être agencée de manière à être comprimée dans la direction longitudinale et extraite de la partie de palier, et via laquelle la partie de joint (4) de la pompe peut être reçue à l'intérieur de la partie de palier, et peut être agencée pour prendre une taille normale dans la direction longitudinale et attachée aux première et troisième parties de l'arbre d'entraînement.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description