EP0343166A1 - Zahnradmaschine (pumpe oder motor). - Google Patents
Zahnradmaschine (pumpe oder motor).Info
- Publication number
- EP0343166A1 EP0343166A1 EP88900541A EP88900541A EP0343166A1 EP 0343166 A1 EP0343166 A1 EP 0343166A1 EP 88900541 A EP88900541 A EP 88900541A EP 88900541 A EP88900541 A EP 88900541A EP 0343166 A1 EP0343166 A1 EP 0343166A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- gear
- bearing body
- pressure
- pump
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 2
- 239000004480 active ingredient Substances 0.000 claims 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0023—Axial sealings for working fluid
- F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
Definitions
- the invention relates to a gear machine according to the preamble of the main claim.
- gear machines it is disadvantageous that the sealing of the pressure field is not yet perfect, since a certain counter pressure can build up on the sealing arrangement or the sealing plate due to a lack of radial contact forces.
- the gear machine according to the invention with the characterizing features of the main claim has the advantage that the axial pressure field is properly sealed, due to the steep pressure gradient between the sealing plate and the groove, which causes a strong radial pressure of the sealing element on the housing. This makes it possible to increase the machine's performance in terms of higher pressures, higher speeds and lower losses.
- FIG. 1 shows a longitudinal section through a gear pump in FIG. 1, a detail X in FIG. 2, a top view of a sealing element in FIG. 3, and a top view of a support element in FIG.
- the gear pump has a housing 10 which is closed on both sides by covers 11, 12. In the housing, two gears 13, 14 mesh with one another in external engagement, the shaft journals 15 to 18 of which are mounted in bushing or glasses-shaped bearing bodies 19, 20.
- the shaft journal 16 has an extension 22 with which it projects through a bore 23 in the cover and is used to drive the gear pump.
- a shaft seal 24 is arranged in an extension of the bore 23.
- a sealing plate 26 and 27 is arranged between each pair of bearing body surfaces 19, 20 and the gearwheel side surfaces. Between each sealing plate and the adjacent bearing bodies there is a sealing arrangement 28, 29, by means of which sealing arrangements are built up in a known manner axially acting pressure fields 30, 31, which bring the sealing plates 26, 27 into sealing contact with the gear side surfaces. Leakage losses are largely reduced as a result.
- a circumferential relief groove 32, 33 is formed on the outer circumference of each bearing body 19, 20 and as close as possible to its end face facing the sealing plate.
- These relief grooves are either connected to the low-pressure side or suction side via the gap that is always present between the bearing body and the housing wall, or via a longitudinal groove (not shown).
- the sealing arrangement 28 is shown in detail in FIGS. 2 to 4. It consists of a molded seal 34 made of elastic material and in the form of a 3, which molded seal in a support member 35 made of a harder material, for. B. PTFE is embedded. The molded seal 34 bears with its back against the sealing plate 27, while the support element 35 faces the bearing body 20.
- the relief groove 33 can also be clearly seen in FIG. It has only a small height and depth, but this is completely sufficient for the relief effect.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Hydraulic Motors (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3701099 | 1987-01-16 | ||
DE19873701099 DE3701099A1 (de) | 1987-01-16 | 1987-01-16 | Zahnradmaschine (pumpe oder motor) |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0343166A1 true EP0343166A1 (de) | 1989-11-29 |
EP0343166B1 EP0343166B1 (de) | 1991-09-25 |
Family
ID=6318929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880900541 Expired - Lifetime EP0343166B1 (de) | 1987-01-16 | 1988-01-07 | Zahnradmaschine (pumpe oder motor) |
Country Status (5)
Country | Link |
---|---|
US (1) | US4958994A (de) |
EP (1) | EP0343166B1 (de) |
JP (1) | JP2716493B2 (de) |
DE (2) | DE3701099A1 (de) |
WO (1) | WO1988005501A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10104621B4 (de) * | 2001-02-02 | 2014-07-24 | Robert Bosch Gmbh | Axialfeldabdichtung einer Zahnradmaschine |
DE202011100622U1 (de) * | 2011-05-12 | 2012-08-14 | Hugo Vogelsang Maschinenbau Gmbh | Vorrichtung zum Abdichten eines Pumpraums einer Drehkolbenpumpe, sowie Drehkolbenpumpe mit selbiger |
CN105351186A (zh) * | 2015-11-25 | 2016-02-24 | 徐州科源液压股份有限公司 | 采用新结构轴套的高压齿轮泵 |
CN106762620B (zh) * | 2016-12-15 | 2018-08-17 | 徐州科源液压股份有限公司 | 一种具有新型卸荷槽的浮动侧板的制造方法 |
CN107061138B (zh) * | 2017-06-20 | 2021-01-05 | 合肥长源液压股份有限公司 | 高压齿轮马达 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2974605A (en) * | 1959-02-12 | 1961-03-14 | Borg Warner | Pressure loaded hydraulic apparatus |
FR1526323A (fr) * | 1967-04-14 | 1968-05-24 | Sigma | Perfectionnements apportés aux pompes et moteurs hydrauliques à engrenages |
US3499390A (en) * | 1968-04-11 | 1970-03-10 | Parker Hannifin Corp | Rotary pump |
JPS4910103B1 (de) * | 1969-08-21 | 1974-03-08 | ||
DE2403319A1 (de) * | 1974-01-24 | 1975-07-31 | Bosch Gmbh Robert | Zahnradmaschine |
FR2335711A1 (fr) * | 1975-12-16 | 1977-07-15 | Rexroth Sigma | Perfectionnements apportes aux machines volumetriques a engrenages, et aux procedes de fabrication de ces machines |
DE2610827A1 (de) * | 1976-03-15 | 1977-09-29 | Bosch Gmbh Robert | Zahnradmaschine (pumpe oder motor) |
GB1568560A (en) * | 1976-03-15 | 1980-05-29 | Bosch Gmbh Robert | Gear pump or motor |
DE2847711A1 (de) * | 1978-11-03 | 1980-05-14 | Bosch Gmbh Robert | Zahnradmaschine (pumpe oder hydromotor) |
JPS55116258A (en) * | 1979-03-01 | 1980-09-06 | Fuji Photo Film Co Ltd | Microimmunoassay method |
US4605363A (en) * | 1985-03-25 | 1986-08-12 | Sundstrand Corporation | Gear pump with pivoted bushings that can deflect |
-
1987
- 1987-01-16 DE DE19873701099 patent/DE3701099A1/de not_active Withdrawn
-
1988
- 1988-01-07 WO PCT/DE1988/000007 patent/WO1988005501A1/de active IP Right Grant
- 1988-01-07 JP JP63500833A patent/JP2716493B2/ja not_active Expired - Lifetime
- 1988-01-07 US US07/378,181 patent/US4958994A/en not_active Expired - Fee Related
- 1988-01-07 DE DE8888900541T patent/DE3865195D1/de not_active Expired - Lifetime
- 1988-01-07 EP EP19880900541 patent/EP0343166B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8805501A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2716493B2 (ja) | 1998-02-18 |
JPH02501939A (ja) | 1990-06-28 |
EP0343166B1 (de) | 1991-09-25 |
DE3701099A1 (de) | 1988-07-28 |
DE3865195D1 (de) | 1991-10-31 |
US4958994A (en) | 1990-09-25 |
WO1988005501A1 (en) | 1988-07-28 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
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GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ITF | It: translation for a ep patent filed | ||
RAP4 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: ROBERT BOSCH GMBH |
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PLBE | No opposition filed within time limit |
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STAA | Information on the status of an ep patent application or granted ep patent |
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Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050107 |