EP1370771A1 - Self-centering gear pump - Google Patents
Self-centering gear pumpInfo
- Publication number
- EP1370771A1 EP1370771A1 EP02724189A EP02724189A EP1370771A1 EP 1370771 A1 EP1370771 A1 EP 1370771A1 EP 02724189 A EP02724189 A EP 02724189A EP 02724189 A EP02724189 A EP 02724189A EP 1370771 A1 EP1370771 A1 EP 1370771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- drive shaft
- drive
- drive gear
- housing
- 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.)
- Withdrawn
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
- F04C2/103—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 one member having simultaneously a rotational movement about its own axis and an orbital movement
Definitions
- the invention relates to a self-centering gear pump, in particular for conveying and metering flowable pastes and liquids, but in a wide variety of temperature ranges during the conveying process, by means of an externally toothed plastic drive gear, which is plugged onto a centrally arranged, smooth motor shaft, without a positive connection, and an internally meshing, eccentrically to the motor shaft Ring gear revolving within a circular housing, which is closed on both sides by the housing side walls, but is slidingly abutting the inner wall on the ring gear and the drive gearwheel with little running play, the side wall facing away from the motor containing an inlet and an outlet opening for the passage of the liquids through the pump.
- the invention specified in claim 1 is based on the object of designing a self-centering gear pump which can self-priming, flowable pastes and non-lubricating liquids even when used in a wide variety of temperature ranges and metered and metered.
- the claim 1 of the invention enables a constant functionality with expansion coefficients of the same material, whereby an axial thrust with longitudinal expansion of the drive shaft 3 is not transmitted to the drive gear 4 carried by it.
- Radial thermal expansion of the drive gear 4 and the floating ring gear 8 is absorbed and compensated for by the existing suction-side clearance 16 within the slot-shaped housing interior. Axially and radially, the rotating toothing elements can slide and position themselves in their optimal position for every temperature range during the work process.
- the self-centering gear pump consists of a circular housing interior which is designed slightly as an elongated hole between the central axis 17 and 18 and in which a rotatable, centrally mounted smooth drive shaft 3 carries an axially displaceable drive gear 4 made of plastic without a positive connection.
- a smooth drive shaft 3 rotates in the direction of the arrow about the fixed center point 5
- the resulting torque is abruptly used by means of a roller freewheel 6 for the non-positive connection between the drive shaft 3 and gear hub 7 within the drive gear 4 and takes it into its rotational movement in accordance with the direction of rotation.
- the drive gear 4 which is constantly in meshing engagement with the overhung internal gear ring 8, which has one more tooth, makes a circular orbital movement around the fixed center 5, while at the same time making the ring gear inside the wall of the semicircle 10 in the housing inner wall 8 circumferentially slides.
- the difference in the number of teeth 1 between the drive gear 4 and the ring gear 8 causes a relative movement between the two, as a result of which constantly changing cavities 11 form, which expand on the suction side from zero to the greatest extent and decrease on the pressure side again to zero, which causes the liquid to be conveyed is sucked into the pump interior via the pump inlet 12 and the overflow channel 13 and is displaced again on the pressure side through the overflow channel 14 to the pump outlet 15.
- Figure 1 shows a sectional view of the front view of a self-centering gear pump.
- Figure 2 shows a front view of a self-centering gear pump with the housing cover on.
- FIG. 3 shows a sectional illustration in the course A - A according to FIG. 2 of a self-centering gear pump.
- the smooth drive shaft 3 By driving the smooth drive shaft 3 in the direction of the arrow around the fixed center point 5, the resulting torque abruptly establishes the non-positive connection between the drive shaft 3 and the gear hub 7 by means of the roller freewheel 6 and the axially attached drive gear 4 and brings the drive gear 4 into a rotational movement.
- the constant mesh 9 is one more tooth internally toothed ring gear 8 also slidably rotated along the inner-walled semicircle 10 of the housing 1.
- the difference in the number of teeth 1 between the drive gear 4 and the ring gear 8 generates a relative movement between the two and forms cavities 11 which expand their volume on the suction side from zero to the greatest extent and on the pressure side again to zero, which causes the liquid to be conveyed to pass through the pump inlet 12 and the overflow channel 13 is sucked into the pump interior and is displaced on the pressure side through the overflow channel 14 to the pump outlet 15.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10114148A DE10114148C1 (en) | 2001-03-22 | 2001-03-22 | Self-centering gearwheel pump, especially for flowable pastes and fluids, includes driving gearwheel axially fitted non-positively on smooth drive shaft and with eccentric hollow wheel to compensate radial heat expansions |
DE10114148 | 2001-03-22 | ||
PCT/EP2002/002253 WO2002077458A1 (en) | 2001-03-22 | 2002-03-01 | Self-centering gear pump |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1370771A1 true EP1370771A1 (en) | 2003-12-17 |
Family
ID=7678638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02724189A Withdrawn EP1370771A1 (en) | 2001-03-22 | 2002-03-01 | Self-centering gear pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040136856A1 (en) |
EP (1) | EP1370771A1 (en) |
CA (1) | CA2441596A1 (en) |
DE (1) | DE10114148C1 (en) |
WO (1) | WO2002077458A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108916628B (en) * | 2018-07-10 | 2019-12-31 | 浙江平柴泵业有限公司 | Efficient oil pump |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE451437C (en) * | 1924-03-14 | 1927-10-27 | Hill Compressor And Pump Co In | Side seal for gear compressors or pumps with eccentrically nested gears |
US1631592A (en) * | 1926-09-01 | 1927-06-07 | Hill Compressor & Pump Company | Rotary pumping machine |
US2434135A (en) * | 1942-12-02 | 1948-01-06 | Eaton Mfg Co | Gear pump structure |
AT174800B (en) * | 1952-01-15 | 1953-05-11 | Benno Fiala-Fernbrugg | Gear pump |
US3958494A (en) * | 1974-09-30 | 1976-05-25 | Moog Inc. | Multiple displacement hydraulic motor drive apparatus |
DE19651683A1 (en) * | 1996-12-12 | 1998-06-18 | Otto Eckerle | Internal gear pump without filler |
DE19710804A1 (en) * | 1997-03-17 | 1998-09-24 | Geraete Und Pumpenbau Gmbh | Gear pump for conveying fluids |
DE29810548U1 (en) * | 1998-06-16 | 1998-12-17 | Joma Polytec Gmbh | Gear for a gear pump |
JP2001132660A (en) * | 1999-11-09 | 2001-05-18 | Mitsubishi Materials Corp | Al ALLOY INSCRIBED GEAR TYPE OIL PUMP HAVING STRUCTURAL MEMBER FOR EXHIBITING SMALL OPPONENT ATTACKING PROPERTY AND EXCELLENT ABRASION RESISTANCE |
JP2001214869A (en) * | 2000-01-31 | 2001-08-10 | Sumitomo Electric Ind Ltd | Oil pump |
DE10262395B4 (en) * | 2001-08-09 | 2016-03-03 | Denso Corporation | Rotary pump with higher delivery pressure and brake device having the same |
-
2001
- 2001-03-22 DE DE10114148A patent/DE10114148C1/en not_active Expired - Fee Related
-
2002
- 2002-03-01 WO PCT/EP2002/002253 patent/WO2002077458A1/en not_active Application Discontinuation
- 2002-03-01 US US10/472,456 patent/US20040136856A1/en not_active Abandoned
- 2002-03-01 CA CA002441596A patent/CA2441596A1/en not_active Abandoned
- 2002-03-01 EP EP02724189A patent/EP1370771A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO02077458A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002077458A1 (en) | 2002-10-03 |
DE10114148C1 (en) | 2002-06-06 |
CA2441596A1 (en) | 2002-10-03 |
US20040136856A1 (en) | 2004-07-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20031004 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
17Q | First examination report despatched |
Effective date: 20040308 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F04C 2/08 20060101ALI20060912BHEP Ipc: F04C 15/00 20060101ALI20060912BHEP Ipc: F04C 14/06 20060101ALI20060912BHEP Ipc: F04C 2/10 20060101AFI20060912BHEP Ipc: F04C 13/00 20060101ALI20060912BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20070126 |