DE10114148C1 - 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 - Google Patents

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

Info

Publication number
DE10114148C1
DE10114148C1 DE2001114148 DE10114148A DE10114148C1 DE 10114148 C1 DE10114148 C1 DE 10114148C1 DE 2001114148 DE2001114148 DE 2001114148 DE 10114148 A DE10114148 A DE 10114148A DE 10114148 C1 DE10114148 C1 DE 10114148C1
Authority
DE
Germany
Prior art keywords
gear
drive shaft
self
drive
centering
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 - Fee Related
Application number
DE2001114148
Other languages
German (de)
Inventor
Dieter Brox
Original Assignee
Dieter Brox
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
Application filed by Dieter Brox filed Critical Dieter Brox
Priority to DE2001114148 priority Critical patent/DE10114148C1/en
Application granted granted Critical
Publication of DE10114148C1 publication Critical patent/DE10114148C1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-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
    • F04C2/103Rotary-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

Abstract

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 a drive gearwheel axially plugged onto a centrally arranged smooth motor shaft without a positive connection and an eccentrically arranged internal meshing ring gear, circumferentially within a cylindrical one Housing, which is closed on both sides by housing side walls.

Description

The invention relates to a self-centering gear pump, in particular for delivery and Dosie flowable pastes and liquids, but in different temperature ranges during of the conveying process, by means of a plugged onto a centrally arranged smooth motor shaft externally toothed plastic drive gear without a positive connection and an eccentric ring gear which meshes with the motor shaft all the way inside a circular housing, which is closed on both sides by the housing side walls but on the internal side on the ring gear and is slidably fitted to the drive gear with little running play, the side facing away from the motor tenwand an inlet and an outlet opening for the passage of liquids through the pump ent holds.

In this type of machines with overhung ring gear and fixed rotating drive gear be In order to achieve optimal funding accuracy, special means and precautions may be required.

It is known, for example, the ring gear and drive gear by means of a spring force on the side to seal the ten walls (DE 451 437 C). In other machines with vertical installation, the Eigen seals load of the rotating rotor (US 1631592).

However, since the rotating displacement elements also make it easier for non-lubricating people to move more easily Liquids and should rotate in the event of greater thermal expansion is a special gradation of pumps for different temperature ranges is absolutely necessary.

The invention specified in claim 1 is based on the object, a self-centering Gear pump to design, the self-priming flowable pastes and also non-lubricating liquid pumping and metering even when used in a wide range of temperatures can.

This object is solved by the features of claim 1. The claim 1 of the invention made light with increasing thermal expansion even with larger temperature differences, a constant functionality with the same material expansion coefficient, wherein an axial thrust with linear expansion of the drive shaft 3 is not transmitted to the drive gear 4 carried by this. Radial thermal expansion of the drive gear 4 and the floating revolving 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 slightly formed as an elongated hole between the central axis 17 and 18 , in which a rotatable, centrally mounted smooth drive shaft 3 carries an axially displaceable drive gear 4 made of plastic without a positive connection. When the smooth drive shaft 3 rotates in the direction of the arrow around 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 accordingly takes the direction of rotation of this in its rotary motion.

The drive gear 4 , which is constantly with the overhung, one more tooth, internally toothed ring gear 8 in meshing 9 , makes a circular orbital movement around the fixed center 5 , while at the same time inwall along the wall of the semicircle 10 in the housing inner wall of the ring gear 8 circumferentially slides.

The number of teeth difference 1 between the drive gear 4 and ring gear 8 causes a relative movement between the two, whereby constantly changing cavities 11 are formed, 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 liquid 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 .

The invention is explained in more detail below using an exemplary embodiment and with reference to Drawings shown.

Fig. 1 shows a sectional view of the front view of a self-centering gear pump.

Fig. 2 shows a front view of a self-centering gear pump with the cover lying on the housing.

Fig. 3 shows a sectional view in the course AA of FIG. 2 of a self-centering gear pump.

By driving the smooth drive shaft 3 in the arrow direction about the fixed center 5 illustrates by means of the roller one-way clutch 6 and the axially aufgestekten drive gear 4, the resulting rotational torque abruptly, the frictional connection between drive shaft 3 and the gear hub 7 forth and brings the drive gear 4 in a rotational movement. About the constant tooth engagement 9 , the one tooth more internal toothed ring gear 8 is also set in rotation along the inner half-circle 10 of the housing 1 in rotation. 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 reduce on the pressure side again to zero, which causes the liquid to be conveyed to enter the pump 12 and the overflow channel 13 is sucked into the interior of the pump and is displaced on the pressure side by the overflow channel 14 to the pump outlet 15 .

Claims (2)

1. Self-centering gear pump with the following features:
  • a) in a cylindrical housing ( 1 ) through a smooth, circular, rotatably mounted drive shaft ( 3 ) an axially with the gear hub ( 7 ) can be plugged on drive gear ( 4 ) made of plastic;
  • b) the drive gear ( 4 ) with a non-positive connection to the gear hub ( 7 ) is not releasably connected;
  • c) by driving the drive shaft ( 3 ) around the fixed center point ( 5 ), a torque created by means of a roller freewheel ( 6 ) abruptly establishes the positive connection between the drive shaft ( 3 ) and the gear hub ( 7 ), with rollers of the roller freewheel ( 6 ) over the entire periphery on the smooth upper surface of the drive shaft (3) by stapling, but at standstill of the drive shaft (3) released again;
  • d) over the constant tooth engagement ( 9 ) is a one more tooth elastic ring gear ( 8 ) slidably along the inner semicircle ( 10 ) within the housing ( 1 ) in a relative rotational movement to the driving drive gear ( 4 );
  • e) the cylindrical housing ( 1 ) has a circular slightly, as an elongated hole housing interior in which the inner wall between the central axes ( 17 ) and ( 18 ) is designed as a short straight line;
  • f) in the case of operational material heating, radial thermal expansions from the elastic ring gear ( 8 ) or drive gear ( 4 ) are shifted into the available space ( 16 ) and compensated;
  • g) an axial elongation when the drive shaft ( 3 ) heats up, the axial shifting possibility of the drive gear ( 4 ) on the smooth drive shaft ( 3 ) is used to compensate for the length expansion when the roller freewheel ( 6 ) is used;
2. Self-centering gear pump according to claim 1, characterized in that the rotating toothed parts drive gear ( 4 ) and ring gear ( 8 ) have the same material expansion coefficients as the housing ( 1 ).
DE2001114148 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 Expired - Fee Related DE10114148C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001114148 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

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2001114148 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
CA 2441596 CA2441596A1 (en) 2001-03-22 2002-03-01 Self-centering gear pump
PCT/EP2002/002253 WO2002077458A1 (en) 2001-03-22 2002-03-01 Self-centering gear pump
US10/472,456 US20040136856A1 (en) 2001-03-22 2002-03-01 Self-centering gear pump
EP20020724189 EP1370771A1 (en) 2001-03-22 2002-03-01 Self-centering gear pump

Publications (1)

Publication Number Publication Date
DE10114148C1 true DE10114148C1 (en) 2002-06-06

Family

ID=7678638

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001114148 Expired - Fee Related 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

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108916628A (en) * 2018-07-10 2018-11-30 浙江平柴泵业有限公司 A kind of efficient engine oil pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1631592A (en) * 1926-09-01 1927-06-07 Hill Compressor & Pump Company Rotary pumping machine
DE451437C (en) * 1924-03-14 1927-10-27 Hill Compressor And Pump Co In Side seal for gear pumps with compressors or eccentrically one inside the other gear wheels
AT174800B (en) * 1952-01-15 1953-05-11 Benno Fiala-Fernbrugg gear pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434135A (en) * 1942-12-02 1948-01-06 Eaton Mfg Co Gear pump structure
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 Jatco Transtechnology Ltd 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
US6749272B2 (en) * 2001-08-09 2004-06-15 Denso Corporation Rotary pump with higher discharge pressure and brake apparatus having same

Patent Citations (3)

* Cited by examiner, † Cited by third party
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 pumps with compressors or eccentrically one inside the other gear wheels
US1631592A (en) * 1926-09-01 1927-06-07 Hill Compressor & Pump Company Rotary pumping machine
AT174800B (en) * 1952-01-15 1953-05-11 Benno Fiala-Fernbrugg gear pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108916628A (en) * 2018-07-10 2018-11-30 浙江平柴泵业有限公司 A kind of efficient engine oil pump
CN108916628B (en) * 2018-07-10 2019-12-31 浙江平柴泵业有限公司 Efficient oil pump

Also Published As

Publication number Publication date
CA2441596A1 (en) 2002-10-03
EP1370771A1 (en) 2003-12-17
WO2002077458A1 (en) 2002-10-03
US20040136856A1 (en) 2004-07-15

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee