EP0740075B1 - Schneckenpumpe - Google Patents
Schneckenpumpe Download PDFInfo
- Publication number
- EP0740075B1 EP0740075B1 EP96105517A EP96105517A EP0740075B1 EP 0740075 B1 EP0740075 B1 EP 0740075B1 EP 96105517 A EP96105517 A EP 96105517A EP 96105517 A EP96105517 A EP 96105517A EP 0740075 B1 EP0740075 B1 EP 0740075B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- feed
- adjusting
- tensioning
- pressure
- 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 - Lifetime
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/06—Implements for applying plaster, insulating material, or the like
- E04F21/08—Mechanical implements
- E04F21/10—Mechanical implements centrifugally acting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/08—Scoop devices
- F04B19/12—Scoop devices of helical or screw-type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0027—Varying behaviour or the very pump
- F04D15/0033—By-passing by increasing clearance between impeller and its casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D3/00—Axial-flow pumps
- F04D3/02—Axial-flow pumps of screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
Definitions
- the invention relates to a screw pump, as they e.g. for pumping pasty materials, in particular Building materials such as mixed plasters or the like. is used, as from DE 86 09 300 U1 or DE-OS 22 37 563 known.
- a screw pump has to pump the pumped Materials a rotatably mounted and by a drive device drivable screw conveyor on the when transporting the material with the pump required pressure is applied.
- Screw pumps are e.g. for mixing and conveying building materials especially as a continuous mixer or plastering machine used.
- the screw conveyor is surrounded by a screw shell made of (conditionally) flexible material (plastic or rubber).
- the screw shell must be close to the "thread” or “screw” of the screw conveyor and that applied to the material by the screw conveyor Withstand pressure.
- the Screw shell surrounded by a clamping device, at which is generally a kind of metal cuff acts.
- This cuff has a peripheral portion on which is less than 360 ° around the closed Snail shell extends and adjacent to each other has radially projecting flanges which by means of Clamping bolts or the like are interconnected.
- the tensioning pin becomes radial over the sleeve Tension is applied to the screw shell so that this attaches itself firmly to the screw conveyor.
- the screw shell is due to friction with the Screw conveyor and the material to be pumped a constant Exposed to wear, which is why it is relatively common must be replaced.
- the invention has for its object a screw pump to create where the snail shell is on easily clamped depending on the delivery pressure becomes.
- the screw pump according to the invention is provided with a screw conveyor, a drive device for rotating the screw conveyor, one the screw conveyor surrounding screw shell and a tensioning device for tensioning the screw shell against the Screw conveyor, the tensioning device the snail shell by means of a controllable adjustment device against the screw conveyor.
- the tensioning device tightens the screw shell by means of the controllable adjustment device automatically against the screw conveyor.
- the adjustment device depending on the delivery pressure of the pumped Mass controllable, in such a way that the force with which the screw shell strained against the screw conveyor is, increases with increasing delivery pressure, in particular is proportional to the delivery pressure.
- a drive device is used Hydraulic motor used; this has the advantage that the hydraulic pressure and thus the hydraulic fluid directly for actuating and controlling the clamping device can be used, which at least one Has hydraulic stamp, for tensioning or relaxing of the snail shell either on train or Pressure or pressure or tension is claimed (pressure or train stamp).
- the tensioning device is adjusted at the Screw pump according to the invention depending on the load or delivery pressure.
- This is the pressure of the hydraulic fluid of the hydraulic motor of the screw pump directly tapped and to control the clamping device used.
- This makes it possible for the snail shell to look like this to be able to clamp heavily against the screw conveyor, like it is required for the currently required delivery pressure is. So that the friction and thus the Wear on the screw shell is reduced.
- a Worm pump the worm casing its wear adjust automatically accordingly.
- the screw pump can with minimal friction between the screw conveyor and screw shell are operated.
- Delivery pressure can be worked with a low screw shell pressure be, which is also advantageous a reduction in operating the screw pump energy to be applied.
- the tensioning device is activated by the way, that the tension increases with increasing Delivery pressure increases, this dependency in particular is proportional.
- the tensioning device preferably comprises a plurality of tensioning elements (e.g. hydraulic stamp) along the axial Extension of the snail shell distributed on the Attack the clamping device.
- tensioning elements e.g. hydraulic stamp
- adjustment elements can, however also with the same force on the clamping device act. This allows a constant voltage profile over the entire axial length of the Reaching the snail shell.
- the adjustment element or elements of the adjustment device for controlled adjustment of the clamping device have the most varied configurations. Hydraulic stamps, motor-driven spindles or motorized lever systems are possible.
- FIG. 1 shows a side view of a worm pump 10 shown.
- the screw pump 10 is with a Screw housing 12 rotatably mounted screw conveyor 14 provided one axis and one around the axis has extending screw spiral.
- For spinning Driving the screw conveyor 14 is indicated at 16 Hydraulic motor provided as a drive device.
- the housing 12 of the screw pump 10 has one Inlet 18 and an outlet 20 on the two axial ends of the screw conveyor 14 are arranged.
- the structure of the housing 12 is described below with reference to Fig. 2 explained in more detail.
- the screw conveyor 14 is sealed by a screw shell 22 made of elastic material. Especially a plastic material is used for this.
- a metal sleeve 24 is arranged which presses radially from the outside against the screw shell 22 and this, in turn, for the tight contact with the screw conveyor 14 brings.
- the tensioning sleeve 24 encloses the screw shell 22 over almost 360 °, is therefore not completely closed.
- In the area of the open end of the Tension sleeve 24 is essentially radial protruding flanges 25,26 provided by means of a automatically actuated adjusting device 28 for Setting the acting on the screw shell 22 Voltage are movable relative to each other.
- the delivery pressure is determined by the nature of the material (Viscosity) and by the cross section and the length of the connectable to the outlet of the screw pump housing 12 Delivery hose (not shown in the figures). Furthermore, the determination can be made that the pressure acting on the pumping material varies along the screw conveyor 14.
- the screw conveyor 14 becomes the respective one Delivery pressure at the screw pump 10 is determined.
- the one to be described here Embodiment is used as a drive device Hydraulic motor 16 used.
- the operating pressure of this Hydraulic motor 16 is proportional to the delivery pressure, so that the operating pressure is directly suitable for actuation Adjusting elements of the adjusting device 28 can be exploited.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Rotary Pumps (AREA)
- Control Of Fluid Pressure (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Reciprocating Pumps (AREA)
- Screw Conveyors (AREA)
Description
- Fig. 1
- eine Seitenansicht einer Schneckenpumpe mit erfindungsgemäßer Spannvorrichtung und
- Fign. 2 und 3
- Alternativen für die Spannvorrichtung, die jeweils als Querschnittsansichten der Schneckenpumpe gemäß Fig. 1 entlang der Linie II-II dargestellt sind.
Claims (6)
- Schneckenpumpe, insbesondere zum Pumpen von pastösen Massen, wie z.B. Baumaterialien, vorzugsweise angemachte Putzmischungen o.dgl., miteiner Förderschnecke (14),einer Antriebsvorrichtung (16) zum drehenden Antreiben der Förderschnecke (14),einem die Förderschnecke (14) umgebenden Schneckenmantel (22) undeiner Spannvorrichtung (24) zum Spannen des Schneckenmantels (22) gegen die Förderschnecke (14),wobei die Spannvorrichtung (24) den Schneckenmantel (22) mittels einer ansteuerbaren Verstellvorrichtung (28) gegen die Förderschnecke (14) spannt unddie Verstellvorrichtung (28) in Abhängigkeit von dem Förderdruck der zu pumpenden Masse ansteuerbar ist, und zwar derart, daß die Kraft, mit der der Schneckenmantel (22) gegen die Förderschnecke (14) gespannt ist, mit zunehmendem Förderdruck ansteigt, insbesondere proportional zum Förderdruck istdaß die Antriebsvorrichtung (16) und die Verstellvorrichtung (28) jeweils hydraulisch betreibbar sind und daß der sich in der Antriebsvorrichtung (16) einstellende Hydraulikdruck direkt zur Ansteuerung der Verstellvorrichtung (28) genutzt wird.
- Schneckenpumpe nach Anspruch 1, dadurch gekennzeichnet, daß eine Meßvorrichtung zum Messen des Förderdrucks vorgesehen ist und daß die Verstellvorrichtung (28) in Abhängigkeit von dem Ausgangssignal der Meßvorrichtung steuerbar ist.
- Schneckenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Ermittlungsvorrichtung zum Ermitteln des Förderdrucks aus den Betriebsparametern der Antriebsvorrichtung (16) vorgesehen ist und daß die Verstellvorrichtung (28) in Abhängigkeit von dem Ausgangssignal der Ermittlungsvorrichtung steuerbar ist.
- Schneckenpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Verstellvorrichtung (28) mindestens ein Verstellelement (30) aufweist.
- Schneckenpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Verstellvorrichtung (28) mehrere Verstellelemente (30) aufweist, die in axialer Erstreckung der Förderschnecke (14), insbesondere gleichmäßig, verteilt angeordnet sind.
- Schneckenpumpe nach Anspruch 5, dadurch gekennzeichnet, daß die Verstellelemente (30) unterschiedlich große Kräfte auf die Spannvorrichtung (24) ausüben.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19513452 | 1995-04-08 | ||
DE19513452 | 1995-04-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0740075A1 EP0740075A1 (de) | 1996-10-30 |
EP0740075B1 true EP0740075B1 (de) | 1999-07-28 |
Family
ID=7759309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96105517A Expired - Lifetime EP0740075B1 (de) | 1995-04-08 | 1996-04-06 | Schneckenpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0740075B1 (de) |
AT (1) | ATE182658T1 (de) |
DE (2) | DE29605270U1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3011445A (en) * | 1957-11-13 | 1961-12-05 | Robbin & Myers Inc | Helical gear pump with by-pass |
FR1486745A (fr) * | 1966-07-13 | 1967-06-30 | Pompe à vis sans fin et excentrique | |
DE2237563A1 (de) * | 1972-07-31 | 1974-02-21 | Heinz Krieger | Hydro-spannblock fuer schneckenmaentel |
DE8609300U1 (de) * | 1986-04-05 | 1986-05-22 | Viesel, Manfred, 7432 Bad Urach | Spannvorrichtung für Schneckenmäntel |
-
1996
- 1996-03-21 DE DE29605270U patent/DE29605270U1/de not_active Expired - Lifetime
- 1996-04-06 DE DE59602516T patent/DE59602516D1/de not_active Expired - Fee Related
- 1996-04-06 AT AT96105517T patent/ATE182658T1/de not_active IP Right Cessation
- 1996-04-06 EP EP96105517A patent/EP0740075B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0740075A1 (de) | 1996-10-30 |
ATE182658T1 (de) | 1999-08-15 |
DE59602516D1 (de) | 1999-09-02 |
DE29605270U1 (de) | 1996-05-30 |
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