GB2377255A - Screw fed pump - Google Patents

Screw fed pump Download PDF

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Publication number
GB2377255A
GB2377255A GB0205836A GB0205836A GB2377255A GB 2377255 A GB2377255 A GB 2377255A GB 0205836 A GB0205836 A GB 0205836A GB 0205836 A GB0205836 A GB 0205836A GB 2377255 A GB2377255 A GB 2377255A
Authority
GB
United Kingdom
Prior art keywords
drive
feed screw
eccentric spiral
spiral pump
rotor
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.)
Granted
Application number
GB0205836A
Other versions
GB0205836D0 (en
GB2377255B (en
Inventor
Klemenz Fokenberg
Michel Houmeau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seepex GmbH
Original Assignee
Seepex Seeberger GmbH and Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7681225&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2377255(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Seepex Seeberger GmbH and Co filed Critical Seepex Seeberger GmbH and Co
Publication of GB0205836D0 publication Critical patent/GB0205836D0/en
Publication of GB2377255A publication Critical patent/GB2377255A/en
Application granted granted Critical
Publication of GB2377255B publication Critical patent/GB2377255B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F04C11/006—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle having complementary function
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/60—Shafts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Screw Conveyors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

An eccentric spiral (or mono) pump comprises a stator 1, a rotor 2, a drive shaft 3, a coupling rod 4 between the drive shaft 3 and the rotor 2, a pump housing 5 with a filling hopper 6, and a feed screw 8, which surrounds the coupling rod 4 and which passes through the filling region 7, for the material to be conveyed, with the feed screw 8 surrounding the coupling rod 4 as a hollow screw at a predetermined radial spacing A and being drivable independently of the rotor.

Description

1- 2377255
Description
This invention relates to an eccentric spiral pump comprising a stator, a rotor, a drive shaft, a coupling rod between the drive shaft and the rotor, a pump housing with a filling hopper, and 5 a feed screw which surrounds the coupling rod and which passes through the filling region.
In eccentric spiral pumps of this type, the material to be conveyed is pressed by means of the feed screw into conveying chambers between the rotor and the stator. In order to achieve a good filling ratio whilst maintaining a satisfactory efficiency, the conveying volume of the 10 feed screw has to be matched to the conveying chamber volume. This frequently results in the feed screw having to be made relatively small. However, there is then the risk of bridging and also of accretions on the feed screw. This is unsatisfactory, as is the fact that the feed screw is generally welded to the coupling rod between the drive shaft and the rotor and for this reason has to execute eccentric movements; consequently, it cannot be mounted so that it 15 runs at the periphery. The present invention aims to provide a remedy here.
The underlying object of the present invention is to create an eccentric spiral pump of the form described at the outset which firstly is capable of operating with a relatively large f fling volume and with which secondly it is possible to measure out the f fling volume for the rotor 20 whilst employing an operationally correct, problem-free mode of construction.
This object is achieved according to the invention for an eccentric spiral pump of the type described at the outset in that the feed screw surrounds the coupling rod as a hollow screw at a predetermined radial spacing and is driven independently of the rotor. The invention also 25 comprises an embodiment in which the coupling rod and the drive shaft form a modular unit and consequently the drive shaft is surrounded by the feed screw. The result of these measures according to the invention is that the feed screw can have a relatively large diameter, so that the occurrence of bridging or accretions on the feed screw is impossible.
However, this large diameter of the feed screw does not result in the risk of excess capacity 30 of the filling volume compared with the rotor and stator, because the speed of rotation of the separately driven feed screw can always be decreased, and consequently the conveying
- 2 volume of the feed screw can be matched to the respective conveying chamber volume of the eccentric spiral pump. In this respect, it is possible within the scope of the invention for the conveying volume to be determined so that it is matched to the respective conveying chamber volume, whilst achieving the optimum filling ratio at a useful efficiency. Another 5 advantage is manifested in the form of the feed screw which enables it to run at the periphery, since the hollow screw no longer has to execute eccentric movements. Rather, the feed screw can now be mounted centrally in the filling region underneath the filling hopper.
In this respect, a mode of construction is put into effect which operates reliably and free from problems. Other features which constitute the essence of the invention are listed below. Thus the invention provides for the feed screw to be attached to a hollow shaft which surrounds the drive shaft and which comprises a drive pinion. The hollow shaft is preferably supported or mounted in the pump housing or in a drive housing which is associated with the pump 15 housing. Furthermore, at its shaft end on the screw side the hollow shaft can have a connecting flange for the feed screw. The feed screw in turn can be fixed to a supporting ring on the drive side, and the supporting ring in turn can be fixed to the connecting flange, e.g. it can be screwed to the connecting flange.
20 According to one embodiment of the invention, a main drive can act on the drive shaft and an auxiliary drive can act on the hollow shaft. Two drives are therefore employed in this case. According to another embodiment of the invention, it is possible for the main drive for the drive shaft to act on the hollow shaft with an intermediate gear or transmission interposed therebetween, so that only one drive is necessary. The transmission can be a shift 25 transmission or an adjustable transmission, which can be arbitrarily adjustable. However, it is also possible to use a planetary gear in order to match the conveying volume of the feed screw to the conveying chamber volume of the eccentric spiral pump by measuring out the conveying volume into doses.
30 The invention is explained in more detail below with reference to the drawings, which merely illustrate an example of an embodiment, and where:
Figure 1 is a schematic longitudinal section through an eccentric spiral pump according to the invention; and 5 Figure 2 is a vertical section through the subject of Figure 1 in the region of the feed screw and coupling rod.
The Figures illustrate an eccentric spiral pump, the basic construction of which comprises a stator 1, a rotor 2, a drive shaft 3, a coupling rod 4 between the drive shaft 3 and the rotor 2, 10 a pump housing 5 with a filling hopper 6, and a feed screw 8 for the material to be conveyed, which feed screw surrounds the coupling rod 4 and which passes through the filling region 7 underneath the filling hopper 6. The feed screw 8 surrounds the coupling rod 4 as a hollow screw at a predetermined radial spacing A and is driven independently of the rotor 2. For this purpose, the feed screw 8 is attached to a hollow shaft 9 which surrounds the drive shaft 3 15 and which comprises a drive pinion 10. The hollow shaft 9 is supported or mounted in the pump housing 5 or in a drive housing 11 which is flanged to the pump housing 5, or is rotatably mounted therein via a rolling bearing 12. Moreover, at its shaft end on the screw side the hollow shaft 9 has a connecting flange 13 for the feed screw 8. The feed screw 8 in turn is fixed to a supporting ring 14 which is screwed to the connecting flange 13. In the 20 embodiment exemplified, a main drive acts on the drive shaft 3 and an auxiliary drive acts on the hollow shaft 9. Neither of these drives is illustrated, but they ensure that the rotor 2 on the one hand and the feed screw 8 on the other hand are driven independently of each other.

Claims (8)

Claims
1. An eccentric spiral pump comprising a stator, a rotor, a drive shaft, a coupling rod between the drive shaft and the rotor, a pump housing with a filling hopper, and a feed S screw, which surrounds the coupling rod and which passes through the filling region, for the material to be conveyed, wherein the feed screw surrounds the coupling rod as a hollow screw at a predetermined radial spacing and is driven independently of the rotor.
2. An eccentric spiral pump according to claim 1, wherein the feed screw is attached to 10 a hollow shaft which surrounds the drive shaft and which comprises a drive pinion.
3. An eccentric spiral pump according to claims 1 or 2, wherein the hollow shaft is mounted in a drive housing.
15
4. An eccentric spiral pump according to any one of claims 1 to 3, wherein at its shaft end on the screw side the hollow shaft has a connecting flange for the feed screw.
S. An eccentric spiral pump according to any one of claims 1 to 4, wherein the feed screw is fixed to a supporting ring on the drive side and the supporting ring is fixed to the 20 connecting flange, e.g. is screwed to the connecting flange.
6. An eccentric spiral pump according to any one of claims 1 to 5, wherein a main drive acts on the drive shaft and an auxiliary drive acts on the hollow shaft.
25
7. An eccentric spiral pump according to any one of claims 1 to 5, wherein the main drive for the drive shaft acts on the hollow shaft with an intermediate gear or transmission interposed therebetween.
8. An eccentric spiral pump substantially as herein before described with reference to 30 the accompanying drawings.
GB0205836A 2001-04-11 2002-03-13 Eccentric spiral pump Expired - Fee Related GB2377255B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001118071 DE10118071C2 (en) 2001-04-11 2001-04-11 Eccentric screw pump

Publications (3)

Publication Number Publication Date
GB0205836D0 GB0205836D0 (en) 2002-04-24
GB2377255A true GB2377255A (en) 2003-01-08
GB2377255B GB2377255B (en) 2004-08-18

Family

ID=7681225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0205836A Expired - Fee Related GB2377255B (en) 2001-04-11 2002-03-13 Eccentric spiral pump

Country Status (3)

Country Link
DE (1) DE10118071C2 (en)
FR (1) FR2823536B1 (en)
GB (1) GB2377255B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006036243A1 (en) * 2006-08-03 2008-02-14 Netzsch-Mohnopumpen Gmbh Feed screw for eccentric screw pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531892A (en) * 1983-03-14 1985-07-30 Sunds Defibrator Aktiebolag Apparatus for pumping of pulp
WO1993023223A1 (en) * 1992-05-19 1993-11-25 Abs Byggsystem Aktiebolag Apparatus for preparing and pumping flowable composition
JPH1077974A (en) * 1996-09-03 1998-03-24 Heishin Sobi Kk Single-shaft eccentric screw pump
GB2320067A (en) * 1996-12-09 1998-06-10 Courtaulds Fibres Pump seals
DE20011301U1 (en) * 2000-06-27 2000-10-12 Seepex Seeberger Gmbh & Co Device for conveying thick matter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1678472B1 (en) * 1963-05-02 1970-06-04 Netzsch Maschinenfabrik Feed device for eccentric screw pumps
DE1553201A1 (en) * 1966-04-27 1971-02-18 Schlecht Karl Eccentric screw pump with centric agitator screw
DE4121717C2 (en) * 1991-06-07 1995-01-26 Allweiler Ag Screw pump, in particular eccentric screw pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531892A (en) * 1983-03-14 1985-07-30 Sunds Defibrator Aktiebolag Apparatus for pumping of pulp
WO1993023223A1 (en) * 1992-05-19 1993-11-25 Abs Byggsystem Aktiebolag Apparatus for preparing and pumping flowable composition
JPH1077974A (en) * 1996-09-03 1998-03-24 Heishin Sobi Kk Single-shaft eccentric screw pump
GB2320067A (en) * 1996-12-09 1998-06-10 Courtaulds Fibres Pump seals
DE20011301U1 (en) * 2000-06-27 2000-10-12 Seepex Seeberger Gmbh & Co Device for conveying thick matter

Also Published As

Publication number Publication date
FR2823536B1 (en) 2005-10-28
FR2823536A1 (en) 2002-10-18
DE10118071C2 (en) 2003-05-28
GB0205836D0 (en) 2002-04-24
DE10118071A1 (en) 2002-10-24
GB2377255B (en) 2004-08-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060313