EP2640978B1 - Pumping apparatus, drive and manufacturing method - Google Patents

Description

The invention relates to a conveying device, a drive and a method for producing such a conveying device.

It is well known that in gear pumps, two gears are engaged and upon rotation thereby a medium is conveyed, the gears are of course provided in a recess of a part whose edge region is closely spaced the gears.

From the DE 101 58 534 A1 is a conveyor device for controlling a delivery volume of a gerotor pump known.

From the US Pat. No. 4,501,535 A is a reversible pump with variable throughput known.

The invention is therefore the object of developing a conveyor.

According to the invention the object is achieved in the conveying device according to the in claim 1, in the drive according to the in claim 12 and in the manufacturing method according to the features indicated in claim 13.

• eine erste axial verlaufende Ausnehmung aufweist zur Durchleitung von Fördermittel, insbesondere Medium, zum oder vom ersten Kanalbereich,
• und eine zweite axial verlaufende Ausnehmung aufweist zur Durchleitung von Fördermittel, insbesondere Medium, vom beziehungsweise zum zweiten Kanalbereich,
• wobei je nach Drehstellung

die erste axial verlaufende Ausnehmung der Steuerscheibe mit einem Zuführkanal oder einem Abführkanal in Verbindung steht, insbesondere zur Durchleitung von Fördermittel aus dem Zuführkanal oder einem Abführkanal,
und die zweite axial verlaufende Ausnehmung der Steuerscheibe mit einem Abführkanal beziehungsweise Zuführkanal in Verbindung steht, insbesondere zur Durchleitung von Fördermittel aus dem Zuführkanal oder einem Abführkanal,
wobei zumindest ein Gehäuseteil der Fördervorrichtung ein Lager der Welle aufnimmt und auch gehäusebildend ist für ein Getriebe, welches ein auf der Welle drehfest verbundenes Verzahnungsteil umfasst. Von Vorteil ist dabei, dass bei jeder Drehrichtung der Welle die Förderrichtung gleichgerichtet ist. Es ist also eine drehrichtungsunabhängige Förderung eines Mediums ermöglicht und somit eine Zufuhr von Schmiermittel an eine Schmierstelle in stets gleicher Weise - unabhängig von der Drehrichtung der Welle. Außerdem ist die Fördervorrichtung als Wellenendpumpanordnung realisierbar und benötigt somit keinen eigenen Antrieb. Des Weiteren ist das Umschalten der Kanäle, also Tauschen der Zuführung und Abführung, in einfacher Weise ermöglicht mittels einer Steuerscheibe, die über ein Lager auf der Welle angeordnet ist und somit durch die am Lager wirkenden Reibungskräfte mitnehmbar ist in die jeweilige Drehrichtung bis zur jeweiligen Anschlagflanke der Anschlagscheibe. Es ist also eine Umschalten in sehr einfacher Weise ausführbar.Important features of the invention in the conveying device, in particular gear pump, are that it has a gear rotatably connected to a shaft, the teeth of which is in engagement with the teeth of another gear for conveying funds between a first channel region and a second channel region,
wherein a control disk by means of a bearing, in particular rolling bearing, in particular ball bearing, is rotatably mounted on the shaft, wherein the rotational movement of the control disk is limited by a stop disc, in particular wherein the axis of rotation of the control disk corresponds to the shaft axis,
being the control disc

• a first axially extending recess for the passage of conveying means, in particular medium, to or from the first channel region,
• and a second axially extending recess for the passage of conveying means, in particular medium, from or to the second channel region,
• depending on the rotational position

the first axially extending recess of the control disk is in communication with a feed channel or a discharge channel, in particular for the passage of conveying means out of the feed channel or a discharge channel,
and the second axially extending recess of the control disk is in communication with a discharge channel or feed channel, in particular for the passage of conveying means out of the feed channel or a discharge channel,
wherein at least one housing part of the conveying device receives a bearing of the shaft and is also housing-forming for a transmission which comprises a toothed part rotatably connected to the shaft. The advantage here is that in each direction of rotation of the shaft, the conveying direction is rectified. So it is a direction of rotation independent promotion of a medium allows and thus a supply of lubricant to a lubrication point in always the same way - regardless of the direction of rotation of the shaft. In addition, the conveyor device can be realized as Wellenendpumpanordnung and thus does not require its own drive. Furthermore, the switching of the channels, ie swapping the supply and discharge, in a simple manner by means of a control disc which is arranged on a bearing on the shaft and thus by the frictional forces acting on the bearing is entrained in the respective direction of rotation to the respective stop edge the stopper disc. So it is a switch in a very simple manner executable.

In an advantageous embodiment, the axial area covered by the control disk and the stop disk overlap at least partially. The advantage here is that the rotational movement of the control disk can be limited in a simple manner by means of the stop plate. For the control disc is providable in a recess of the stop disc and thus easily limited in their rotational movement regardless of the direction of rotation. The stop disc is rotatably connected to the housing part and is thus prevented from turning with the shaft.

In an advantageous embodiment, the first channel region and the second channel region and the gears are arranged in a recess of a disc, in particular in the same axial region. The advantage here is that the supply and discharge of the pumped medium can be carried out at an axial position and thus the flow rate is determined by the axial extent. The greater the axial extent, the greater the delivery rate of the gear pump arrangement. The corresponding axial extent is either one piece achievable, that is made possible by parts correspondingly thick in the axial direction, or in several pieces, ie by a plurality, in particular two or more, in the axial direction successively arranged identically shaped parts.

In an advantageous embodiment of the feed channel leads into the interior of a transmission housing, in particular for the passage of lubricant of the transmission to a lubrication point of the transmission, and / or in a pipe, in particular wherein the tube to a cooler, such as liquid cooler, oil cooler, water cooler or the like leads , The advantage here is that the directional independent promotion always the same flow relationship meadow is generated circuit. However, the delivery rate of the arrangement also decreases with decreasing speed. But since the transmission also has correspondingly lower power losses at low speed, the heat generation is lower and thus the heat to be dissipated necessarily also.

In an advantageous embodiment of the discharge channel leads into the interior of a transmission housing, in particular for the passage of lubricant of the transmission from an oil sump to the conveyor, and / or in a pipe, in particular wherein the tube is arranged immersed in the oil sump of the transmission or in a cooler, such as Liquid cooler, oil cooler, water cooler or the like leads. It is advantageous that a challenge of lubricant from the oil sump is executable and thus the subsidized stream is a radiator for cooling and / or a lubrication point of the transmission for lubrication feedable.

In an advantageous embodiment, the shaft shaft of a transmission, in particular driving shaft, in particular wherein a toothed part of a first gear stage is rotatably connected to the shaft,

in particular wherein axially between the toothing part and the rotatably connected to the shaft gear, a bearing of the shaft is arranged, in particular which is arranged in a housing part of the transmission. The advantage here is that the spatial area of the transmission is separated by means of the bearing from the spatial area of the gear pump arrangement. Because this arrangement is attachable to the shaft end.
In an advantageous embodiment, at least one housing part of the conveying device receives a bearing of the shaft and is also housing-forming for a transmission, which comprises a toothed part rotatably connected to the shaft. The advantage here is that the conveyor has an integrated transmission. In other words, the gear housing also includes not only gearing parts of the transmission but also the gear pump assembly.

In an advantageous embodiment, the feed channel and / or the discharge channel to a recess which extends in the circumferential direction over less than 180 °, in particular wherein the recess is arranged substantially semicircular and / or tubular. The advantage here is that by means of a rotatable control disk, which is arranged axially adjacent to the channel regions, an axially continuous recess of the control disk over the supply or Abführkanalbereich can be positioned - depending on the rotational position.

In an advantageous embodiment, supply channel and discharge channel are spaced from each other. The advantage here is that by passing over the spacing region in the circumferential direction, the recess of the control disk either in contact with the Zuführkanalberiech or in contact with the Abführkanalbereich can be brought.

In an advantageous embodiment, the housing part has a sleeve-shaped portion, to which a cover part is tightly and detachably connectable, so that the conveyor is surrounded by the housing forming part and cover part. The advantage here is that the sleeve-shaped portion can be shortened depending on the desired flow rate and thus depending on the desired axial length.

In an advantageous embodiment, a plurality of gears axially in succession on the shaft rotatably provided and a plurality of gears are arranged with the other gear on a common axis one behind the other,
in particular, wherein the housing part has a sleeve-shaped portion, on which a cover part is tightly and detachably connectable, so that the conveyor, comprising the gears, is surrounded by the section and cover part forming the housing. The advantage here is that the gear pump assembly is integrated housed in the gear housing.

In an advantageous embodiment, the conveyor is arranged at an axial end portion of the shaft and is connected at the other axial end portion with a rotor shaft directly or via a coupling device,
in particular wherein the rotor shaft drives the shaft and thus the gear wheel of the conveying device provided thereon in a rotationally fixed manner. The advantage here is that the gear promotion at the shaft end integrated in the housing of the transmission is providable and does not need its own drive but runs along with the shaft.

Important features of the drive, in particular gear or gear motor, with an aforementioned conveying device are that the conveying device is arranged at an axial end portion of the shaft.

The advantage here is that a shaft end pump can be realized.

• die Anzahl der axial hintereinander angeordnete Zahnräder gewählt wird, wobei die Anzahl 1 oder größer gewählt wird,
• ein Gehäuseteil aus einem Rohteil, insbesondere Rohgussteil, mit einem hülsenförmigen Abschnitt, also rohrförmigen Fortsatz, gefertigt wird, indem der Abschnitt entsprechend der gewählten Anzahl abgelängt wird, insbesondere abgeschnitten und/oder abgedreht.

Important features in the manufacturing method for such a conveying device are that

• the number of axially successively arranged gears is selected, the number being 1 or greater,
• a housing part of a blank, in particular raw casting, with a sleeve-shaped portion, ie tubular extension is made by the section is cut to length according to the selected number, in particular cut and / or turned off.

The advantage here is that by merely executable cutting any number of gears and thus the desired pump power in the interior of the tubular, so tubular housing portion can be accommodated.

Further advantages emerge from the subclaims. The invention is not limited to the combination of features of the claims. For the skilled person, further meaningful combination options of claims and / or individual claim features and / or features of the description and / or figures, in particular from the task and / or the task posing by comparison with the prior art arise.

• In der Figur 1 ist eine Seitenansicht der erfindungsgemäßen Wellenendpumpanordnung gezeigt.
• In der Figur 2 ist eine zugehörige Schrägansicht gezeigt.
• In der Figur 3 ist eine zugehörige Draufsicht gezeigt.
• In der Figur 4 ist ein Querschnitt gezeigt.
• In der Figur 5 ist ein weiter außen liegender Querschnitt gezeigt.
• In der Figur 6 ist Querschnitt gezeigt, der zwischen den Querschnitten der Figur 4 und 5 liegt.
• In der Figur 7 ist ein hierzu senkrecht stehender Querschnitt.
• In der Figur 8 ist ein hierzu um die Wellenachse verdrehter Querschnitt gezeigt.

The invention will now be explained in more detail with reference to figures:

• In the FIG. 1 is a side view of the Wellenendpumpanordnung invention shown.
• In the FIG. 2 an associated oblique view is shown.
• In the FIG. 3 an associated plan view is shown.
• In the FIG. 4 a cross section is shown.
• In the FIG. 5 a further outward cross-section is shown.
• In the FIG. 6 Cross section is shown between the cross sections of the FIG. 4 and 5 lies.
• In the FIG. 7 is a vertical cross-section.
• In the FIG. 8 is shown a twisted about the shaft axis cross-section.

In the pumping arrangement, a shaft 47 is mounted via a bearing 48 in the housing part 3. In this case, the housing part 3 is preferably associated with a transmission and the shaft 47 is a driving shaft of the transmission, so a fast rotating operable shaft. At an axial end region of the pump assembly is provided integrated.

The pumping arrangement operates in the manner of a gear pump. Here, a gear 53 is rotatably connected to the shaft 47 at the shaft end, which is in engagement with a gear 52 which is mounted on an axis in a connecting plate 43 with recesses (45, 46) and connection openings (20, 40, 41 , 42) and is mounted in a bearing plate 70.

The engaged gears (52, 53) promote a medium, such as lubricant of the transmission or water from an upstream feed channel 55 to a discharge channel 56. Each of these channels leads in the axial direction through a respective hole, ie Recess 65, a control disk 61 in a respective recess 44 and 45, respectively.

In this case, the control disk 61 is rotatably supported by means of a bearing 63 on the shaft 47. Due to friction, the control disk 61 is taken in the respective direction of rotation of the shaft 47. The control disk 61 is rotatable only in a recess provided for it a stop disk 66. This means that they are indeed taken by the rotating shaft 47 in the direction of rotation, however, only until it hits the stop plate 66th

After striking the control disk 61 to the stop disk 66, the medium is supplied in the feed or discharge channel depending on the rotational position of the control disk 61. Because the hole, so recess 65, is located axially above the recess 45 or alternatively over the recess 46 of the connection plate 43. These recesses extend in the circumferential direction in each case by less than 180 °. By means of the rotational movement of the control disk so either a flow through possibility between recess 44 and a hole, ie recess 65, the control disk 61 or between recess 45 and a hole, ie recess 65, the control disk 61 causes. Thus, when changing the direction of rotation, the removal of the medium in the other of the recesses (44, 45) is changed. But since the direction of rotation of the gears (52, 53) is changed, also the conveying direction is changed, so that the medium is always supplied via the connection opening (41, 42) to the recess 45 and is led out via the recess 44 into the connection opening (20, 40).

In this case, the connection opening 41 of the two merged connection openings (41, 42) serves to selectively supply the medium from an internal piping or external piping. When supplied from an internal piping lubricant is then sucked from the oil sump of the transmission and promoted by the gear pump, comprising the gears (52, 53), the output side in a pipe from which lubrication points are charged with the delivered lubricant. Preferably, the engagement region of the gears is lubricated and / or a bearing lubricated.

When using the external piping, the medium is supplied from an external pipe and discharged from another pipe. Thus, the gear pump for Promotion of lubricant usable, which is conveyed by a radiator or a cooling unit. The sucked lubricant is sucked in from the oil sump of the transmission and then conveyed through the radiator. The lubricant cooled in this way is then returned to the transmission and can be used for lubrication and / or cooling of parts of the transmission.

The spacing of the recesses 44 and 45 in the circumferential direction is smaller than the angular amount by which the control disk 61 can reciprocate.

The control disk has on its stop side a small groove 62 extending in the axial direction, which allows an axial outflow of the amount of medium to be displaced during the rotation direction change. Thus, a faster switching of the gear pump is possible.

By means of the recesses 46 screws are axially feasible, which are also used as a safeguard against rotational movement of the connecting plate 43.

In the bearing plate 70, an axial end of the shaft 47 and the axis of the gear 52 is supported. The other axial end of the axis of the gear 52 is mounted in the connection plate 43.

In a further embodiment of the invention, the gear pump is also modular, so that it can be produced with scalable performance.

For this purpose, the sleeve-shaped portion 1 of the housing part 3 is tapped from the blank at such a location that the desired length is reached. In the surrounded by the sleeve-like portion 1 part of the gear pump, the parts are provided according to the desired performance. For this purpose, a corresponding number of gears 52, 53 arranged axially one behind the other on the shaft 47 and the axis of the gear 52. Correspondingly long in the axial direction, the shaft 47 and the axis of the gear 52 are executed. Likewise, disks 51 are stacked axially one on top of the other. In this way, therefore, a gear pump assembly is produced, which provides the desired capacity.

The sleeve-shaped portion 1 of the housing part 3 is in turn closed by the cover part 2, so that the gear pump assembly housing forming of the cover part 2 and the portion 1 are surrounded.

LIST OF REFERENCE NUMBERS

1

Sleeve-shaped portion of the housing part. 3

2

cover part

3

housing part

20

Connection opening for external piping

40

Connection opening for internal piping

41

Connection opening for internal piping

42

Connection opening for external piping

43

Connection plate with recesses (45, 46) and connection openings (20, 40, 41, 42)

44

recess

45

recess

46

recess

47

wave

48

camp

51

Disc with recesses

52

gear

53

gear

55

feed

56

discharge channel

61

control disc

62

groove

63

camp

64

recess

65

recess

66

stop disc

70

bearing disk

Claims (13)

1. Conveying apparatus, in particular gear pump,
   having a gearwheel (52, 53) which is connected rotationally fixedly on a shaft (47) and the toothing of which is in engagement with the toothing of another gearwheel (52, 53) for conveying conveying medium between a first channel region (55) and a second channel region (56),
   characterised in that
   a control disc (61) is mounted rotatably on the shaft (47) by means of a bearing (48), in particular rolling bearing, in particular ball bearing, wherein the rotational movement of the control disc (61) is restricted by means of a stop disc (66), wherein the rotational axis of the control disc (61) corresponds to the shaft axis,
   wherein the control disc (61) has

   - a first axially extending recess (65) for conducting conveying medium, in particular fluid, to or from the first channel region,

   - and a second axially extending recess (65) for conducting conveying medium, in particular fluid, from or to the second channel region,

   - wherein, depending on the rotational position

   the first axially extending recess (65) of the control disc (61) is connected to a feed channel (55) or a discharge channel (56), in particular for conducting conveying medium out of the feed channel (55) or a discharge channel (56),
   and the second axially extending recess (65) of the control disc (61) is connected to a discharge channel (56) or feed channel (55), in particular for conducting conveying medium out of the feed channel (55) or a discharge channel (56),
   wherein at least one housing part (3) of the conveying apparatus receives a bearing (48) of the shaft (47) and also is housing-forming for a gearing which comprises a toothing part connected rotationally fixedly on the shaft (47).
2. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the axial region covered by the control disc (61) and the stop disc (66) at least partially overlap.
3. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   first channel region and second channel region as well as the gearwheels are arranged in a recess of a disc (51), in particular in the same axial region.
4. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the feed channel (55) leads into the interior of a gearing housing, in particular for conducting lubricant of the gearing to a lubricating point of the gearing, and/or into a pipe, in particular wherein the pipe leads to a cooler, such as a liquid cooler, oil cooler, water cooler or the like.
5. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the discharge channel (56) leads into the interior of a gearing housing, in particular for conducting lubricant of the gearing from an oil sump to the conveying apparatus, and/or into a pipe, in particular wherein the pipe is arranged dipping into the oil sump of the gearing or into a cooler, such as liquid cooler, oil cooler, water cooler or the like.
6. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the shaft (47) is shaft (47) of a gearing, in particular input shaft (47), in particular wherein a toothing part of a first gearing stage is connected rotationally fixedly on the shaft (47),
   in particular wherein a bearing (48) of the shaft (47) is arranged axially between the toothing part and the gearwheel (52, 53) connected rotationally fixedly on the shaft (47), in particular which bearing is arranged in a housing part (3) of the gearing.
7. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the feed channel (55) and/or the discharge channel (56) has a recess (44, 45, 46) which extends in the circumferential direction over less than 180°,
   in particular wherein the recess (44, 45, 46) is arranged substantially in a semicircular shape and/or tubular shape.
8. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   feed channel (55) and discharge channel (56) are spaced apart from one another.
9. Conveying apparatus according to at least one of the preceding claims,
   characterised in that
   the housing part (3) has a sleeve-shaped portion (1), onto which a lid part (2) is sealingly and detachably connectable, so that the conveying device is surrounded by the portion and lid part (2) in a housing-forming manner.
10. Conveying apparatus according to at least one of the preceding claims,
    characterised in that
    a plurality of gearwheels are provided rotationally fixedly on the shaft (47) axially one behind the other and a plurality of gearwheels are arranged with the other gearwheel (52, 53) on a common axis one behind the other,
    in particular wherein the housing part (3) has a sleeve-shaped portion (1), onto which a lid part (2) is sealingly and detachably connectable, so that the conveying device, comprising the gearwheels, is surrounded by the portion and lid part (2) in a housing-forming manner.
11. Conveying apparatus according to at least one of the preceding claims,
    characterised in that
    the conveying device is arranged at an axial end region of the shaft (47) and at the other axial end region is connected to a rotor shaft directly or via a coupling apparatus,
    in particular wherein the rotor shaft drives the shaft (47) and thus the gearwheel (52, 53) of the conveying device provided rotationally fixedly thereon.
12. Drive, in particular gearing or geared motor, having a conveying apparatus according to at least one of the preceding claims,
    characterised in that
    the conveying apparatus is arranged at an axial end region of the shaft (47).
13. Method for manufacturing a conveying apparatus according to one of Claims 1 to 11,
    characterised in that

    - the number of gearwheels arranged axially one behind the other is selected, wherein the number 1 or greater is selected,

    - a housing part (3) is produced from an unfinished part, in particular unfinished casting, with a sleeve-shaped portion (1), i.e. tubular extension, by cutting to length, in particular cutting off and/or turning off, the portion according to the selected number.

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