WO2011032766A2 - Zahnradpumpe mit zwei rotierenden pumpelementen - Google Patents
Zahnradpumpe mit zwei rotierenden pumpelementen Download PDFInfo
- Publication number
- WO2011032766A2 WO2011032766A2 PCT/EP2010/060968 EP2010060968W WO2011032766A2 WO 2011032766 A2 WO2011032766 A2 WO 2011032766A2 EP 2010060968 W EP2010060968 W EP 2010060968W WO 2011032766 A2 WO2011032766 A2 WO 2011032766A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gear pump
- boundary wall
- pressure equalization
- housing part
- groove
- Prior art date
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
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
-
- 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
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
-
- 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
- F04C2230/00—Manufacture
- F04C2230/10—Manufacture by removing material
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Definitions
- the invention relates to a gear pump according to the preamble of claim 1, and a method according to the independent claims.
- the invention is based on the object to cheapen the production of a gear pump.
- the invention has the advantage that a second housing part, which axially delimits a recess in a first housing part of a gear pump, can also be produced without hardened or specially treated surfaces, since there is an increased erosion due to cavitation only to a small extent or even is not exposed at all. For example, on a
- Nickel plating or anodizing be dispensed with.
- L O the pressure equalization by a comparatively short
- a gear pump according to the invention has at least two rotating pumping elements, wherein a first housing part has a mostly blind hole-like recess for receiving the pumping elements. Another component of the first housing part is the one or both
- Pressure balance groove contains.
- the invention is based on the recognition that erosion predominantly in areas with particularly high
- Fluid velocities occur in the region of the pressure equalization grooves.
- the pressure compensation groove is at least partially through
- the pressure compensation groove has at least partially an approximately triangular, semicircular or trapezoidal cross-sectional shape and is formed in the region of an edge adjacent to the second housing part of the recess.
- This can be a Cutters can be used with a short shank, so that the production of the pressure compensation groove is simplified and the milling accuracy is increased.
- the triangular, the semicircular or the trapezoidal cross-sectional shape is particularly suitable for producing a cross section which is substantially closed to the second housing part, with a comparatively simple and inexpensive end mill can be used.
- the flowing back through the pressure equalization fluid can be kept away from the second housing part.
- the pressure compensation groove seen in the longitudinal direction in one area has a different cross-sectional shape than in another area.
- the cross-sectional shape of the pressure equalization groove can be better adapted to the pressure profile and thus the operation of the gear pump can be optimized.
- Pressure equalization groove is made only in the region of its end remote from a pressure area by a comparison with the boundary wall oblique milling surface and thereby has a cross-section which is at least substantially closed to the second housing part.
- the end of the pressure compensation groove remote from the pressure region is particularly critical. In the other areas, the pressure compensation groove can be made with a different cross-sectional shape, so that their production is simplified.
- Pressure equalization groove seen in its longitudinal direction in a region having a different cross-sectional area than in another area can be better matched to a respective pressure profile along the pressure equalization groove.
- it can be designed by changing the cross-sectional area for a wide speed range. This makes it possible to achieve a large flow rate at low speeds and at the same time avoid cavitation damage to the gear pump at high speeds.
- a method for producing a gear pump according to the invention provides that the pressure equalization groove is milled out of the radial boundary wall by means of an end mill or end mill by tilting an axis of rotation of the end mill or end mill relative to the boundary wall. This can be produced with a cross section, which is at least substantially closed to a second housing part of the gear pump with a commercial milling tool a pressure equalization.
- An alternative method provides that the pressure equalization groove by means of a milling cutter, in particular a finger milling cutter, whose axis of rotation is parallel to the boundary wall, and which has a relative to the boundary wall oblique radial milling surface, in particular by means of a
- Dovetail milling cutter is milled.
- the cutter can be used without a tilted position by the proposed for the pressure equalization and opposite the boundary wall oblique milling surface is generated by the cutter itself.
- This can, for example, a
- Figure 1 is a partial sectional view of a gear pump
- Figure 2 is an axial section along a line II-II of Figure 1 through a housing of the gear pump of Figure 1 for explaining a first
- Figure 3 is an axial section similar to Figure 2 for explaining a second method for producing a pressure equalization groove
- Figure 4 is an axial section along a line IV-IV of Figure 1 through a housing of the gear pump of Figure 1;
- Figure 5 is an axial section taken along a line VV of Figure 1 through a housing of the gear pump of Figure 1; and FIG. 6 shows an axial section, alternative to FIG. 4, along a line IV-IV of FIG. 1 through a housing of the gear pump of FIG. 1.
- a first housing part 12 of a total of 10 designated gear pump which includes essential elements of the gear pump 10 and receives in a recess 13.
- two bearing journals 16 extending perpendicularly to the sheet plane of FIG. 1 and two pumping elements guided thereon as toothed wheels 18 can be seen. These are surrounded over a wide area of their circumference by a radial boundary wall 20.
- FIG. 1 In the middle of FIG. 1, there are in each case a suction channel 22 and a pressure channel 24, taking into account a direction of rotation 19a and 19b of the gearwheels 18 shown in FIG. 1.
- Two arrows 26 indicate a flow direction of a medium to be conveyed, in the representation of FIG So from right to left. As a medium, for example, fuel comes into question.
- the sectional plane of Figure 1 is chosen so that two radial boundaries 28 of two
- the pressure compensation grooves 30 are, starting from the pressure channel 24, seen in the circumferential direction only over a part of the radial boundary wall 20 executed. In terms of the two
- Gears 18, the gear pump 10 structurally and functionally symmetrical design.
- Gear pump 10 with respect to the figure 1 for reasons of representation. Not shown is the gear 18. Dash-dotted lines is a with respect to the Radial boundary wall 20 tilted simple cylindrical finger or end mill 32, as it would be recognized in a not yet mounted second housing part 14 to the pressure equalization groove 30 from the radial
- Pressure equalization groove 30 is closed to the second housing part 14 toward substantially. Therefore, the medium flowing back along the pressure equalization groove 30 comes into contact with a surface of the second housing part 14 little or not at all.
- the medium to be delivered is transported starting from the suction channel 22 between the tooth gaps of the gears 18 and the radial boundary wall 20 in the direction of rotation of the gears 18 until it enters the pressure channel 24 and is discharged there to the outside.
- the center of the gear pump 10 in a region of meshing teeth of the gears 18, no appreciable volume fraction is transported against the direction indicated by the arrows 26 flow direction.
- the Druckausticiansnut 30 connected to the pressure channel 24 receives a portion of the medium to be delivered as a result of a high pressure formed in the pressure channel 24 and transports it against the direction of rotation of the two gears 18 over part of its circumference. This can occur locally high flow rates. Because the pressure equalizing groove 30 is designed in its cross-sectional shape so as to be substantially closed toward the second housing part 14, the medium flowing back in the pressure compensating groove 30 does not or hardly touches the second housing part.
- a finger or dovetail cutter 34 is shown in Figure 3 in a dash-dotted representation, as it would be recognized in a not yet mounted second housing part 14 to the Druckausretetail cutter 30 from the radial boundary wall 20 of the first housing part 12 to mill out.
- FIG. 4 shows, similar to FIG. 2, a view of the pressure compensation groove 30, as it was milled with the end mill 32 from the radial boundary wall 20.
- a dimension "a” indicates a height of the pressure compensation groove 30, as it is embodied in this case at an end of the pressure compensation groove 30 facing away from the pressure channel 24.
- FIG. 5 shows the pressure compensation groove 30 with a height "b" which is greater than that of FIG.
- the height "a” of FIG. 4 may be steadily developed during the milling operation from the initial height "b" of FIG. 5 - or vice versa - by additionally moving the milling cutter in an axial direction.
- the cross-sectional area of the pressure compensation groove 30 decreases in the direction of the end remote from the pressure region 24.
- FIG. 6 shows a cross-sectional shape, alternative to FIG. 4, of the pressure compensation groove 30 in the region adjacent to the pressure channel 24, which in the present case has a rectangular shape.
- Gear pump 10 are adapted, in particular to the longitudinally of the
- the pressure equalization groove 30 may first be formed with a cross section according to FIG. 6, and continuously transition into a cross section according to FIG. 5 in an end region.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10737062A EP2478224A2 (de) | 2009-09-17 | 2010-07-28 | Zahnradpumpe mit zwei rotierenden pumpelementen |
CN201080041307.6A CN102498296B (zh) | 2009-09-17 | 2010-07-28 | 具有两个旋转的泵元件的齿轮泵 |
IN2315DEN2012 IN2012DN02315A (de) | 2009-09-17 | 2012-03-16 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009029522.4 | 2009-09-17 | ||
DE200910029522 DE102009029522A1 (de) | 2009-09-17 | 2009-09-17 | Zahnradpumpe mit zwei rotierenden Pumpelementen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011032766A2 true WO2011032766A2 (de) | 2011-03-24 |
WO2011032766A3 WO2011032766A3 (de) | 2011-10-13 |
Family
ID=43603137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/060968 WO2011032766A2 (de) | 2009-09-17 | 2010-07-28 | Zahnradpumpe mit zwei rotierenden pumpelementen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2478224A2 (de) |
CN (1) | CN102498296B (de) |
DE (1) | DE102009029522A1 (de) |
IN (1) | IN2012DN02315A (de) |
WO (1) | WO2011032766A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104389640B (zh) * | 2013-09-28 | 2017-09-05 | 摩尔动力(北京)技术股份有限公司 | 等模数齿轮流体机构及应用其的发动机 |
DE102013113610A1 (de) | 2013-12-06 | 2015-06-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brennkraftmaschine, vorzugsweise mit einem Trockensumpfschmiersystem |
CN106762613A (zh) * | 2017-01-16 | 2017-05-31 | 三明索富泵业有限公司 | 一种径向间隙补偿齿轮泵 |
CN118088443A (zh) * | 2024-04-22 | 2024-05-28 | 浙江大学 | 一种齿轮泵的内流道减振降噪结构及其设计方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10018348A1 (de) | 2000-04-13 | 2001-10-25 | Bosch Gmbh Robert | Zahnradpumpe, insbesondere für eine Hochdruck-Kraftstoffpumpe |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1553125A1 (de) * | 1965-02-20 | 1970-04-30 | Maschf Augsburg Nuernberg Ag | Zahnradpumpe |
DE2227119A1 (de) * | 1972-06-03 | 1973-12-13 | Daimler Benz Ag | Zahnrad-oelpumpe, insbesondere fuer kraftfahrzeug-brennkraftmaschinen |
JPS5274102A (en) * | 1975-12-17 | 1977-06-21 | Unitika Ltd | Gear pumps for spinning machines |
ES2121344T3 (es) * | 1994-02-14 | 1998-11-16 | Rhodia Filtec Ag | Bomba de hilar para poliamidas. |
GB2312476B (en) * | 1996-04-24 | 1999-12-08 | Sauer Sundstrand Ltd | Pressure balance control in gear pumps |
JPH11159477A (ja) * | 1997-11-26 | 1999-06-15 | Shimadzu Corp | 液圧歯車ポンプ |
-
2009
- 2009-09-17 DE DE200910029522 patent/DE102009029522A1/de not_active Withdrawn
-
2010
- 2010-07-28 CN CN201080041307.6A patent/CN102498296B/zh not_active Expired - Fee Related
- 2010-07-28 WO PCT/EP2010/060968 patent/WO2011032766A2/de active Application Filing
- 2010-07-28 EP EP10737062A patent/EP2478224A2/de not_active Withdrawn
-
2012
- 2012-03-16 IN IN2315DEN2012 patent/IN2012DN02315A/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10018348A1 (de) | 2000-04-13 | 2001-10-25 | Bosch Gmbh Robert | Zahnradpumpe, insbesondere für eine Hochdruck-Kraftstoffpumpe |
Also Published As
Publication number | Publication date |
---|---|
IN2012DN02315A (de) | 2015-08-21 |
WO2011032766A3 (de) | 2011-10-13 |
EP2478224A2 (de) | 2012-07-25 |
CN102498296A (zh) | 2012-06-13 |
DE102009029522A1 (de) | 2011-03-24 |
CN102498296B (zh) | 2015-11-25 |
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