EP0247947B1 - Einbahnpumpvorrichtung mit Umkehrpumpe - Google Patents
Einbahnpumpvorrichtung mit Umkehrpumpe Download PDFInfo
- Publication number
- EP0247947B1 EP0247947B1 EP87401205A EP87401205A EP0247947B1 EP 0247947 B1 EP0247947 B1 EP 0247947B1 EP 87401205 A EP87401205 A EP 87401205A EP 87401205 A EP87401205 A EP 87401205A EP 0247947 B1 EP0247947 B1 EP 0247947B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- inlet
- intermediate chambers
- outlet
- 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.)
- Expired
Links
Images
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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/04—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
Definitions
- the invention relates to pumping, that is to say the circulation and / or pressure of a fluid, in particular a liquid.
- pumping has a meaning which is defined by the fact that the fluid is sucked from one side and discharged from the other.
- It relates more precisely to a device whose active member is a rotary pump and which makes it possible to avoid reversing in the direction of pumping when the direction of rotation of the pump is reversed.
- a fluid circuit (oil for example) comprises a pumping device to ensure a certain flow rate through a member (bearings of rotating machines for example) which must be traversed by this fluid.
- the circuit further comprises an oil tank, a filter, a pressure regulator and a heat exchanger (refrigerant).
- a first known device is used for this purpose. It is shown in principle in Figure 1.
- the pump is functionally associated with four valves.
- a screw pump 100 can push the lubricating oil of the bearings of a rotary machine in two opposite directions, that is to say either from a first intermediate chamber 102 to a second intermediate chamber 104, or in the opposite direction.
- An inlet chamber 106 provided with an inlet opening communicates with each of these two intermediate chambers 102 or 104 by a valve 108 or 110 allowing the oil to pass from this inlet chamber to this intermediate chamber but not In the opposite way.
- a chamber and an outlet opening 112 communicate with each of these two intermediate chambers, 102 or 104, by a valve 114 or 116 allowing the oil to pass from this intermediate chamber to this outlet chamber but not in the direction reverse.
- the case shown is that where the pump 100 pushes the oil towards the chamber 104 according to the arrow 118.
- the valves 110 and 114 are open and the valves 108 and 116 closed by the oil pressure created by the pump 100.
- the oil is then sucked into the inlet chamber 106 into which it enters according to arrow 120, and discharged into the outlet chamber 112 from which it leaves according to arrow 122.
- valves 110 and 114 close, the valves 108 and 116 open and the oil enters and leaves again according to the arrows 120 and 122.
- This device makes it possible to pump large flow rates but has the drawback of using valves which are either easily subject to deterioration, or bulky, or expensive.
- a second known unidirectional pumping device is described in the document patent SUA 180093 and avoids the use of such valves.
- the object of the present invention is to produce in a simple and economical manner a unidirectional pumping device with a reversible pump capable of pumping higher flow rates without having the drawbacks of valve devices.
- Such an arrangement facilitates the production of an integrated pumping device.
- the two said inlet and outlet bores extend parallel, in a common longitudinal direction, from a first to a second face of a distribution body, said first or second intermediate chamber being constituted between this first or second face and a first or second plate extending opposite this face at a distance from the latter, these plates cooperating with means formed by said drawers at their two ends to constitute said stop means, and said recesses lateral and median openings being formed in said body.
- the pumping device of this first embodiment of the invention comprises a pump of the "screw" type with three rotors.
- the juxtaposed rotors of the pump P are represented by their axes which project on the same line 1, axis of the central rotor, and they can be distinguished in 1a, 1, 1 in FIG. 4. and on the other side of the axis are dug two parallel inlet and outlet bores marked respectively 4 and 5.
- the previously mentioned inlet drawer 6 has a longitudinal recess in its part median which constitutes a spacer 62 between two heads marked 61 and 63.
- the outlet drawer 7, shorter, is not hollowed out: these different morphological characteristics of the two drawers are justified by the description below of the operation and additional provisions of the pumping device.
- the drawers are dimensioned so that, in this configuration, the edge of the median recess 13 is released by the face 73 of the drawer 7, while the median recess 14 is released by the edge 63 'of the recess around the 'spacer 62 of the drawer 6 and that the edge 61' releases a communication which is seen at the end in fig.4. It follows from this configuration that the oil flows from the recess 14 which constitutes the inlet chamber to the recess 13 which constitutes the outlet chamber, through the bore 4 around the spacer 62, the recess 9, chamber 8, pump P, chamber 8 'and bore 5.
- the pump rotates in the direction such that the fluid circulates in the direction 204 of fig.3, it is the chamber 8 'which is depressed and the chamber 8 compressed.
- the relative overpressure in the chamber 8 pushes the drawers 6 and 7 into abutment at 68 'and 78'; in this configuration, the edge 63 'releases a communication between the bore 4 and the chamber 8' through the recess 9 '.
- the edge 71 of the drawer 7 clears the recess 13. It generally follows that the oil circulates from 14 to 13 through the bore 4 around the spacer 62, the recess 9 ', the chamber 8 ', pump P, chamber 8 and bore 5.
- the device which has just been described according to the invention allows a higher flow rate. It is less affected by the risk of obstruction. It does not require the use of springs.
- peripheral recesses of the drawers and the lateral recesses of the walls of the bores are less expensive to produce than internal channels and less sensitive to the impurities which the pumped fluid can contain.
- FIG. 5 represents a lubrication circuit comprising the device described above: a rotary machine MT such as a high power alternator is mounted on an AR shaft which is supported by two bearings such as PA. It is the lubrication circuit of these bearings which comprises this DP pumping device. The latter's pump P is driven by a pump shaft AP extending the shaft AR of the machine.
- This circuit includes a tank, that is to say the aforementioned tank BA from which the oil is withdrawn by a suction pipe TA connected to the inlet chamber 14.
- the oil is discharged into a discharge pipe TR connected to the outlet chamber 13, and it is in pressurized in bearings such as PA after passing through an IF filter.
- the distribution box shown in FIGS. 6 to 8 constitutes a second embodiment of the invention when it is connected to a reversible pump (not shown) by two connection openings represented in the form of two pipes 380 and 382. Apart from these openings and the absence of this pump, this box is similar to the device described above, the homologous elements bearing in this box, the same reference numbers increased by 300.
- the inlet and outlet distributor drawers carry example numbers 306 and 307, respectively.
- the two said inlet and outlet bores 304, 305 extend parallel, in a common longitudinal direction 301, from a first 303A to a second 303B opposite a distribution body 303.
- Said first 308 or second 308 ' intermediate chamber is formed between this first or second face and a first 384 or second 384 'plate extending opposite this face at a distance therefrom. These plates cooperate with means 368, 378 formed by said drawers 306, 307 at their two ends to constitute said stop means.
- Said lateral recesses 309, 309 'and median openings 314, 313 are formed in said body.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Hydraulic Motors (AREA)
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87401205T ATE48026T1 (de) | 1986-05-29 | 1987-05-27 | Einbahnpumpvorrichtung mit umkehrpumpe. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8607725A FR2599435B1 (fr) | 1986-05-29 | 1986-05-29 | Dispositif de pompage unidirectionnel a pompe reversible. |
| FR8607725 | 1986-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0247947A1 EP0247947A1 (de) | 1987-12-02 |
| EP0247947B1 true EP0247947B1 (de) | 1989-11-15 |
Family
ID=9335788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87401205A Expired EP0247947B1 (de) | 1986-05-29 | 1987-05-27 | Einbahnpumpvorrichtung mit Umkehrpumpe |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0247947B1 (de) |
| AT (1) | ATE48026T1 (de) |
| DE (1) | DE3761002D1 (de) |
| ES (1) | ES2012092B3 (de) |
| FR (1) | FR2599435B1 (de) |
| GR (1) | GR3000345T3 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2865301A (en) * | 1953-06-24 | 1958-12-23 | Auto Research Corp | Lubrication |
| CH346738A (de) * | 1956-05-03 | 1960-05-31 | Oerlikon Maschf | Fördereinrichtung mit einer Pumpe, die in beiden Drehrichtungen arbeitet |
| GB936679A (en) * | 1960-04-22 | 1963-09-11 | Pneumatikus Es Hidraulikus Gep | Improvements in or relating to screw pumps |
| US3120190A (en) * | 1961-03-02 | 1964-02-04 | Falk Corp | Gear pump |
-
1986
- 1986-05-29 FR FR8607725A patent/FR2599435B1/fr not_active Expired
-
1987
- 1987-05-27 AT AT87401205T patent/ATE48026T1/de not_active IP Right Cessation
- 1987-05-27 DE DE8787401205T patent/DE3761002D1/de not_active Expired
- 1987-05-27 ES ES87401205T patent/ES2012092B3/es not_active Expired - Lifetime
- 1987-05-27 EP EP87401205A patent/EP0247947B1/de not_active Expired
-
1990
- 1990-02-07 GR GR90400071T patent/GR3000345T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATE48026T1 (de) | 1989-12-15 |
| GR3000345T3 (en) | 1991-06-07 |
| DE3761002D1 (en) | 1989-12-21 |
| EP0247947A1 (de) | 1987-12-02 |
| FR2599435B1 (fr) | 1988-08-05 |
| ES2012092B3 (es) | 1990-03-01 |
| FR2599435A1 (fr) | 1987-12-04 |
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