GB1583582A - Rotary liquid pump in particular for plastermixing apparatus - Google Patents
Rotary liquid pump in particular for plastermixing apparatus Download PDFInfo
- Publication number
- GB1583582A GB1583582A GB30724/77A GB3072477A GB1583582A GB 1583582 A GB1583582 A GB 1583582A GB 30724/77 A GB30724/77 A GB 30724/77A GB 3072477 A GB3072477 A GB 3072477A GB 1583582 A GB1583582 A GB 1583582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jacket
- pressure
- thread
- screw
- worm
- 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
Links
- 239000007788 liquid Substances 0.000 title claims description 19
- 239000012858 resilient material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000000750 progressive effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F04C2/1073—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 where one member is stationary while the other member rotates and orbits
-
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
- F04C2250/201—Geometry of the rotor conical shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
(54) ROTARY LIQUID PUMP, IN PARTICULAR
FOR PLASTER-MIXING APPARATUS
(71) 1, MARTIN THEODOR MEL
CHIOR, a German Citizen of Neustrasse 50, 6639 Rehlingen, Germany (Fed. Rep.), do hereby declare the invention, for which we pray that a Patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The invention relates to a liquid pump, in particular for plaster-mixing apparatus, consisting of a driven rotary worm of rigid material, of a non-rotary pressure jacket of resilient material, for example rubber, surrounding the worm and provided with an internal screw-thread and of a housing surrounding the pressure jacket, the numbers of threads of the worm screw-thread and of the internal screw-thread of the pressure jacket being in a ratio of 1:2.In worm pumps of this type, the pumping action is produced owing to the difference in the numbers of threads between the worm screw-thread and the internal screw-thread of the pressure jacket, since during rotation of the worm, the threads of its screw-thread - seen in development - enter the spaces between two adjacent threads of the internal screw-thread of the pressure jacket solely at intervals and thus displace the pressure medium. In oder to ensure this method of operation, the pressure jacket must be made of resilient material, because the outer diameter of the worm screwthread must be greater than the diameter of the internal screw-thread of the pressure jacket.
It is an object of the present invention to provide an improved liquid pump of the kind described above.
According to the present invention there is provided a rotary liquid pump for plastermixing apparatus, comprising a driven rotary worm made of a rigid material and having at least one external screw-thread, a non-rotary tubular jacket made of a resilient material surrounding the worm and provided with at least one internal screw-thread with which the screw thread(s) of the worm cooperate(s), and a housing surrounding the jacket, wherein the numbers of threads of the worm and the jacket are in a ratio of 1:2, the worm screw-thread(s) and the jacket screw-thread(s) are conical with their smallest diameter at the delivery end of the jacket, the worm is axially fixed, the jacket is axially but not rotationally movable in the housing, and at least one defined inner annular part of the end face of the jacket at its delivery end is adapted to be exposed to liquid under pressure.
Preferably, said annular part of the end face of the jacket is formed by an axially projecting collar surrounding a pressure chamber at the outlet of the internal screwthread.of the jacket, the cylindrical outer surface of the collar being sealed off with respect to the inner bore of an annular base connected to the housing by an O-ring allowing axial movement of the pressure jacket.
The annular base preferably supports an outer base part with an outlet bore and a connecting pipe for a hose pipe.
The invention will now be further described by way of example only with reference to the accompanying drawing which is a diagrammatic longitudinal section of one embodiment of rotary liquid pump in accordance with the invention.
The liquid pump firstly comprises a steel housing I with an upper cover 2 provided with openings 2a and a lower composite base part 3, 4. A hopper 5 for pouring in the liquid to be conveyed, for example a slurrylike solution of dry plaster and water, is screwed to the upper cover part 2. The cover part 2 supports a thrust bearing 6 for a conical worm conveyor 7. whose drive shaft 8 leads to a motorised drive (not shown).
The conveyor worm 7 consisting of rigid material, preferably steel, has a single start round screw-thread 7a with the pitch h. It is fixed to the cover part 2 by the thrust bearing 6 and an adjusting ring 9 so that it cannot move axially.
The conveyor worm 7 is surrounded by a pressure jacket 10 of resilient material, for example rubber, which is provided with a two-start internal screw-thread 10a with the pitch H. With the direction of rotation of the conical conveyor worm 7, indicated by the arrow 11, the pumping action results from the different number of threads between the worm screw-thread 7 and the internal screw-thread l()a of the pressure jacket 10. In the illustration, the section through the pressure jacket 10 passes through a vertical plane, in which the two screw-threads are placed tooth-to-tooth on the left-hand side and form worm-like pressure chambers 12 of maximum cross section.
Owing to the difference in the numbers of threads between the worm screw-thread 7a and the internal screw-thread 10a of the pressure jacket, pressure chambers 13 of minimal size are produced on the opposing side, because in this case, the head of each thread of the worm screw-thread 7a penetrates deep into the base of each thread of the internal screw-thread l()a. Between these diametral engagement conditions, there is overlapping between the heads of the screw-threads, for which reason the pressure jacket 10 is made from resilient material.These engagement conditions give rise to the pumping effect and the conicity of the two screw-threads 7a and l()a provides a progressive increase in pressure, because with the decreasing diameter of the screwthreads, the length of the screw-shaped pressure chambers and thus their volume is reduced towards the delivery end of the worm 7.
The pressure jacket 10 is able to move axially within the housing 1, but is guided so that it cannot rotate. For this purpose, the housing 1 is provided with at least one internal longitudinal groove 14. in which strip-like projections lUc distributed over the height of the pressure jacket 10 engage.
The drawing shows two opposed longitudinal slots 14.
At its delivery end. the pressure jacket 10 is constructed as an axially projecting collar 10h, which engages in the annular base part 3 and is sealed with respect to the outer base part 4, which is welded to the annular base 3, by an O-rinz 20 allowing axial movement of the pressure jacket l(). The O-ring defines an annular part 15 of the end face of the pressure jacket l() at the delivery side, which is acted upon by the final pressure of the liquid in the pressure chamber 16.This annular part has an outer diameter DA and an inner diameter D1, so that the surface of this annular part acted upon by the pressure is equal to (DA - Dl )2 x A/4. This annular part 15 of the pressure jacket 10 acted upon by the pressure as well as the prevailing final pressure of the liquid in the pressure chamber 16 determine an upwardly directed axial force, under which the longitudinally displaceable pressure jacket 10 is pushed upwards. Under this axial force increasing with the final pressure which builds up, the engagement conditions between the screwthreads 7a and 10a are adjusted and maintained.
This optimum adjustment of the engagement conditions as well as the sealing conditions existing due to the deformation of the pressure jacket owing to the difference in the threads, takes place automatically. With an axial displacement of the pressure jacket 10 in an upwards direction, the cylindrical outer surface of the axially projecting collar 10b of the pressure jacket 10 slides in the inner bore of the annular base 3.
The outer base part 4 of the annular base 3 is provided with an outlet bore 17 and a curved connecting pipe 18 for a hose pipe.
WHAT I CLAIM IS:
1. A rotary liquid pump for plastermixing apparatus, comprising a driven rotary worm made of a rigid material and having at least one external screw-thread, a non-rotary tubular jacket made of a resilient material surrounding the worm and provided with at least one internal screw-thread with which the screw-thread(s) of the worm cooperate(s), and a housing surrounding the jacket, wherein the numbers of threads of the worm and the jacket are in a ratio of 1:2, the worm screw-thread(s) and the jacket screw-thread(s) are conical with their smallest diameter at the delivery end of the jacket, the worm is axially fixed, the jacket is axially but not rotationally movable in the housing. and at least one defined inner annular part of the end face of the jacket at its delivery end is adapted to be exposed to liquid under pressure.
2. Pump according to claim 1, wherein said annular part of the end face of the jacket is formed by an axially projecting collar surrounding a pressure chamber at the outlet of the internal screw-thread of the jacket, the cylindrical outer surface of the collar being sealed off with respect to the inner bore of an annular base connected to the housing by an O-ring allowing axial movement of the pressure jacket.
3. Pump according to claim 2, wherein the annular base supports an outer base part with an outlet bore and a connecting pipe for a hose pipe.
5. A rotary liquid pump substantially as herein described with reference to and as
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (1)
- **WARNING** start of CLMS field may overlap end of DESC **.The conveyor worm 7 consisting of rigid material, preferably steel, has a single start round screw-thread 7a with the pitch h. It is fixed to the cover part 2 by the thrust bearing 6 and an adjusting ring 9 so that it cannot move axially.The conveyor worm 7 is surrounded by a pressure jacket 10 of resilient material, for example rubber, which is provided with a two-start internal screw-thread 10a with the pitch H. With the direction of rotation of the conical conveyor worm 7, indicated by the arrow 11, the pumping action results from the different number of threads between the worm screw-thread 7 and the internal screw-thread l()a of the pressure jacket 10. In the illustration, the section through the pressure jacket 10 passes through a vertical plane, in which the two screw-threads are placed tooth-to-tooth on the left-hand side and form worm-like pressure chambers 12 of maximum cross section.Owing to the difference in the numbers of threads between the worm screw-thread 7a and the internal screw-thread 10a of the pressure jacket, pressure chambers 13 of minimal size are produced on the opposing side, because in this case, the head of each thread of the worm screw-thread 7a penetrates deep into the base of each thread of the internal screw-thread l()a. Between these diametral engagement conditions, there is overlapping between the heads of the screw-threads, for which reason the pressure jacket 10 is made from resilient material.These engagement conditions give rise to the pumping effect and the conicity of the two screw-threads 7a and l()a provides a progressive increase in pressure, because with the decreasing diameter of the screwthreads, the length of the screw-shaped pressure chambers and thus their volume is reduced towards the delivery end of the worm 7.The pressure jacket 10 is able to move axially within the housing 1, but is guided so that it cannot rotate. For this purpose, the housing 1 is provided with at least one internal longitudinal groove 14. in which strip-like projections lUc distributed over the height of the pressure jacket 10 engage.The drawing shows two opposed longitudinal slots 14.At its delivery end. the pressure jacket 10 is constructed as an axially projecting collar 10h, which engages in the annular base part 3 and is sealed with respect to the outer base part 4, which is welded to the annular base 3, by an O-rinz 20 allowing axial movement of the pressure jacket l(). The O-ring defines an annular part 15 of the end face of the pressure jacket l() at the delivery side, which is acted upon by the final pressure of the liquid in the pressure chamber 16.This annular part has an outer diameter DA and an inner diameter D1, so that the surface of this annular part acted upon by the pressure is equal to (DA - Dl )2 x A/4. This annular part 15 of the pressure jacket 10 acted upon by the pressure as well as the prevailing final pressure of the liquid in the pressure chamber 16 determine an upwardly directed axial force, under which the longitudinally displaceable pressure jacket 10 is pushed upwards. Under this axial force increasing with the final pressure which builds up, the engagement conditions between the screwthreads 7a and 10a are adjusted and maintained.This optimum adjustment of the engagement conditions as well as the sealing conditions existing due to the deformation of the pressure jacket owing to the difference in the threads, takes place automatically. With an axial displacement of the pressure jacket 10 in an upwards direction, the cylindrical outer surface of the axially projecting collar 10b of the pressure jacket 10 slides in the inner bore of the annular base 3.The outer base part 4 of the annular base 3 is provided with an outlet bore 17 and a curved connecting pipe 18 for a hose pipe.WHAT I CLAIM IS:1. A rotary liquid pump for plastermixing apparatus, comprising a driven rotary worm made of a rigid material and having at least one external screw-thread, a non-rotary tubular jacket made of a resilient material surrounding the worm and provided with at least one internal screw-thread with which the screw-thread(s) of the worm cooperate(s), and a housing surrounding the jacket, wherein the numbers of threads of the worm and the jacket are in a ratio of 1:2, the worm screw-thread(s) and the jacket screw-thread(s) are conical with their smallest diameter at the delivery end of the jacket, the worm is axially fixed, the jacket is axially but not rotationally movable in the housing. and at least one defined inner annular part of the end face of the jacket at its delivery end is adapted to be exposed to liquid under pressure.2. Pump according to claim 1, wherein said annular part of the end face of the jacket is formed by an axially projecting collar surrounding a pressure chamber at the outlet of the internal screw-thread of the jacket, the cylindrical outer surface of the collar being sealed off with respect to the inner bore of an annular base connected to the housing by an O-ring allowing axial movement of the pressure jacket.3. Pump according to claim 2, wherein the annular base supports an outer base part with an outlet bore and a connecting pipe for a hose pipe.5. A rotary liquid pump substantially as herein described with reference to and asillustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762632716 DE2632716A1 (en) | 1976-07-21 | 1976-07-21 | LIQUID PUMP, ESPECIALLY FOR PLASTER STARTING DEVICES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1583582A true GB1583582A (en) | 1981-01-28 |
Family
ID=5983539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30724/77A Expired GB1583582A (en) | 1976-07-21 | 1977-07-21 | Rotary liquid pump in particular for plastermixing apparatus |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT349904B (en) |
| BE (1) | BE856930A (en) |
| DE (1) | DE2632716A1 (en) |
| FR (1) | FR2359292A1 (en) |
| GB (1) | GB1583582A (en) |
| IT (1) | IT1081141B (en) |
| LU (1) | LU77818A1 (en) |
| NL (1) | NL7708105A (en) |
| SE (1) | SE7708127L (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6457958B1 (en) | 2001-03-27 | 2002-10-01 | Weatherford/Lamb, Inc. | Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures |
| EP1813812A1 (en) * | 2006-01-26 | 2007-08-01 | Grundfos Management A/S | Progressive cavity pump |
| WO2008000505A1 (en) * | 2006-06-30 | 2008-01-03 | Grundfos Management A/S | Moineau pump |
| WO2008000506A1 (en) * | 2006-06-30 | 2008-01-03 | Grundfos Management A/S | Moineau type pump |
| WO2010122299A2 (en) * | 2009-04-21 | 2010-10-28 | Pdd Innnovations Limited | Pumps |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6358027B1 (en) * | 2000-06-23 | 2002-03-19 | Weatherford/Lamb, Inc. | Adjustable fit progressive cavity pump/motor apparatus and method |
| DE202009002823U1 (en) | 2009-03-02 | 2009-07-30 | Daunheimer, Ralf | Cavity Pump |
| CN103775334B (en) * | 2014-02-13 | 2016-01-13 | 北京工业大学 | A kind of Conic thread rod-lining pair |
| DE102017100715A1 (en) | 2017-01-16 | 2018-07-19 | Hugo Vogelsang Maschinenbau Gmbh | Control of the gap geometry in an eccentric screw pump |
| DE102021131427A1 (en) | 2021-11-30 | 2023-06-01 | Vogelsang Gmbh & Co. Kg | Eccentric screw pump with work delivery and rest delivery and method for controlling the eccentric screw pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1284388A (en) * | 1961-03-21 | 1962-02-09 | Machine for the transport under pressure of mortar, cement or similar products | |
| DE1553197A1 (en) * | 1965-09-08 | 1970-08-06 | Schlecht Dipl Ing Karl | Eccentric screw pump with movable stator |
-
1976
- 1976-07-21 DE DE19762632716 patent/DE2632716A1/en active Granted
-
1977
- 1977-07-07 AT AT488477A patent/AT349904B/en not_active IP Right Cessation
- 1977-07-13 SE SE7708127A patent/SE7708127L/en not_active Application Discontinuation
- 1977-07-19 BE BE179452A patent/BE856930A/en not_active IP Right Cessation
- 1977-07-20 FR FR7722191A patent/FR2359292A1/en active Granted
- 1977-07-20 NL NL7708105A patent/NL7708105A/en not_active Application Discontinuation
- 1977-07-21 LU LU77818A patent/LU77818A1/xx unknown
- 1977-07-21 IT IT7725977A patent/IT1081141B/en active
- 1977-07-21 GB GB30724/77A patent/GB1583582A/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6457958B1 (en) | 2001-03-27 | 2002-10-01 | Weatherford/Lamb, Inc. | Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures |
| WO2002077459A1 (en) * | 2001-03-27 | 2002-10-03 | Weatherford/Lamb, Inc. | Progressive cavity pump |
| EP1813812A1 (en) * | 2006-01-26 | 2007-08-01 | Grundfos Management A/S | Progressive cavity pump |
| WO2007085437A1 (en) * | 2006-01-26 | 2007-08-02 | Grundfos Management A/S | Eccentric screw pump |
| US8152499B2 (en) * | 2006-01-26 | 2012-04-10 | Grundfos Management A/S | Eccentric screw pump |
| CN101484703B (en) * | 2006-06-30 | 2011-10-19 | 格伦德福斯管理联合股份公司 | Moineau type pump |
| WO2008000506A1 (en) * | 2006-06-30 | 2008-01-03 | Grundfos Management A/S | Moineau type pump |
| WO2008000505A1 (en) * | 2006-06-30 | 2008-01-03 | Grundfos Management A/S | Moineau pump |
| CN101473139B (en) * | 2006-06-30 | 2013-08-28 | 格伦德福斯管理联合股份公司 | Moineau pump |
| WO2010122299A2 (en) * | 2009-04-21 | 2010-10-28 | Pdd Innnovations Limited | Pumps |
| WO2010122299A3 (en) * | 2009-04-21 | 2011-04-28 | Pdd Innnovations Limited | Pump with a resilient seal |
| CN102449265A (en) * | 2009-04-21 | 2012-05-09 | 奎安特克斯专利有限公司 | Pump having resilient seal |
| CN102449265B (en) * | 2009-04-21 | 2014-06-18 | 奎安特克斯专利有限公司 | Pump having resilient seal |
| US9175681B2 (en) | 2009-04-21 | 2015-11-03 | Quantex Patents Limited | Pump with a resilient seal |
| AU2010240676B2 (en) * | 2009-04-21 | 2016-03-03 | Quantex Patents Limited | Pump with a resilient seal |
| AU2016202108B2 (en) * | 2009-04-21 | 2016-11-03 | Psg Germany Gmbh | Pump with a resilient seal |
| US10465681B2 (en) | 2009-04-21 | 2019-11-05 | Quantex Patents Limited | Pump with a resilient seal |
Also Published As
| Publication number | Publication date |
|---|---|
| BE856930A (en) | 1977-11-14 |
| DE2632716C2 (en) | 1989-03-09 |
| FR2359292B3 (en) | 1980-07-11 |
| SE7708127L (en) | 1978-01-22 |
| AT349904B (en) | 1979-05-10 |
| LU77818A1 (en) | 1977-10-24 |
| NL7708105A (en) | 1978-01-24 |
| IT1081141B (en) | 1985-05-16 |
| DE2632716A1 (en) | 1978-01-26 |
| FR2359292A1 (en) | 1978-02-17 |
| ATA488477A (en) | 1978-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |