Fluid conveying module with defoaming structure

Abstract

Fluid supply module for supplying a machine assembly with fluid, in particular for supplying an electric motor and / or a transmission of a motor vehicle with oil, comprising a module housing (300) with a reservoir (301) for storing the fluid, at least one suction port (321) and a suction channel (321'), a suction pump with a pump housing (101, 102), a fluid inlet (121) and a fluid outlet (131; 131b), wherein the suction channel (321') is formed in the module housing (300), preferably by the module housing (300), and the suction channel (321') connects the suction pump, in particular a low-pressure side of the suction pump, via the fluid inlet (121) to the suction port (321), and the suction port (321) can be connected fluidically tight to an assembly housing of the machine assembly to be supplied, and the fluid outlet (131;131b) in axial plan view of the module housing (300) within an outer perimeter (302) of the module housing (300), and the fluid outlet (131; 131b) opens vertically above a fluid level of the reservoir (301) when the fluid conveying module is used as intended.

Description

[0001] The invention relates to a fluid conveying system, in particular a fluid conveying module, for supplying at least one machine component with fluid, especially a liquid such as a lubricant and / or coolant. The fluid can, for example, be oil for supplying the machine component. In particular, the invention relates to a fluid conveying module for supplying an engine and / or transmission of a motor vehicle with fluid. In particular, the machine component to be supplied can be an electric motor. The invention is particularly useful for supplying a machine component with fluid, especially oil, for lubrication and / or cooling of the machine component. The fluid conveying module comprises a module housing with a reservoir for storing the fluid and a pump, in particular a suction pump, for conveying the fluid.

[0002] Conventional fluid supply systems for providing fluid to a machine assembly, particularly in the automotive sector for supplying fluid to an engine and / or transmission, are usually based on pressure circulation lubrication, especially wet sump lubrication, with at least one pressure pump that delivers the fluid, particularly oil, to the parts of the machine assembly requiring lubrication and / or cooling. In conventional wet sump lubrication, as the fluid flows away from the machine assembly, it is collected by gravity in a reservoir located below the assembly. The pressure pump then pumps the fluid from the reservoir and returns it to the machine assembly. This creates a fluid circuit for lubricating and / or cooling a machine assembly, in which the fluid is circulated continuously.

[0003] These fluid conveying systems have the disadvantage that they can draw in air, for example, in extreme driving situations. For instance, cornering and / or hard acceleration or braking maneuvers from high speed can cause the resulting centrifugal forces to push the fluid, especially oil, away from the suction point within the reservoir, so that air, or even exclusively air, is drawn in at the suction point along with the fluid. This can lead to an interruption in the fluid supply to the engine and / or to foaming of the fluid.

[0004] As an alternative to wet sump lubrication, so-called dry sump lubrication has been developed.

[0005] In dry sump lubrication, the fluid is drawn from an oil sump, into which it flows back after supplying the engine, by means of at least one suction pump and fed into a separate container. This container then supplies the engine again, with the fluid being drawn from the container by another pressure pump and fed to the engine.

[0006] While this type of pressure lubrication is very reliable in supplying the machine unit with fluid, it is prone to failure due to the large number of additional components and, above all, is expensive. Pressure lubrication systems also require more space and are therefore heavier due to the number of components.

[0007] Such fluid delivery systems also have the disadvantage that the fluid, particularly due to the intake of air by the pressure pump and / or the suction pump, can tend to foam. In particular, short settling times, which the fluid remains in after flowing into the reservoir or oil pan before being drawn in again, can promote foaming of the fluid in both pressure lubrication and dry sump lubrication systems.

[0008] The object of the invention is to provide a fluid conveying system, in particular a fluid conveying module, which is cost-effective and space-saving to manufacture and in particular can reduce the tendency of the fluid to foam up or defoam already foamed fluid.

[0009] The problem is solved by the subject matter of claim 1.

[0010] The fluid supply module can be used, in particular, to supply oil to a motor, preferably an electric motor, and / or a transmission of a motor vehicle. Specifically, the fluid supply module can serve to supply the machine assembly with lubricant and / or coolant.

[0011] The fluid conveying system, in particular the fluid conveying module, for supplying the machine unit with fluid preferably comprises a module housing with a reservoir for storing the fluid.

[0012] The module housing can, in particular, surround or form the reservoir. Specifically, the module housing can circumferentially and axially delimit a module chamber at at least one end face. The module chamber can form the reservoir. In particular, a part or region of the module chamber can form the reservoir. For example, the reservoir can be a region within the module housing, especially a region of the module chamber, in which the fluid is stored.

[0013] Preferably, the module housing is trough-shaped. For example, the module housing can have at least one circumferential wall and a bottom, which together define the module chamber circumferentially and at the ends. In particular, when the fluid conveying module is used as intended, the module housing can define the module chamber circumferentially and vertically at the bottom. When used as intended, the module housing preferably extends further horizontally than vertically.

[0014] The module housing can be mounted on the unit housing of the machine unit to be supplied. When the fluid conveying module is used as intended, the module housing is preferably mounted vertically at the bottom of the unit housing. Furthermore, the module housing, in particular the module chamber, can be open to the environment at one end when disassembled.

[0015] In the assembled state, the module housing, and in particular the module chamber, can be bounded by the unit housing at its end face, which is open in the disassembled state, and in particular sealed in a fluid-tight manner. In this way, the unit housing and the module housing together enclose the module chamber, in which the reservoir may be located or which may constitute the reservoir, when the module housing is assembled. Specifically, when the fluid conveying module is used as intended, the module housing can bound the module chamber circumferentially and vertically at the bottom, while the unit housing bounds the module chamber vertically at the top when the fluid conveying module is assembled. The unit housing can also bound the module chamber vertically at the top and circumferentially when the fluid conveying module is assembled.

[0016] The vertically open module housing and the module chamber, which is vertically limited at the top by the power unit housing when the module housing is mounted, offer the advantage of a space-saving fluid pumping module. In particular, the described design of the fluid pumping module allows the dimensions of the machine unit being supplied, together with the fluid pumping module, to be kept as small as possible in the vertical direction when used as intended, thus preventing, for example, the vehicle's center of gravity from shifting unnecessarily upwards. Furthermore, the power unit housing's function of limiting the module chamber can reduce manufacturing costs, as, for example, a cover for the module housing can be omitted.

[0017] The module housing can be connected to the unit housing of the machine to be supplied via at least one suction port. Preferably, the suction port can be connected to the unit housing in a fluidically leak-tight manner. The at least one suction port can be provided for connecting the fluid conveying module, in particular the module housing, to the machine unit, especially for a fluidic connection. In particular, fluid can flow from the machine unit towards the reservoir via the suction port, and in particular be drawn off.

[0018] Preferably, when the fluid pumping module is used as intended, the fluid can flow exclusively through the at least one suction port from the machine unit to be supplied towards the fluid pumping module, in particular towards the reservoir. If the fluid pumping module includes additional suction ports besides the at least one, the fluid can flow, when the fluid pumping module is used as intended, through the at least one suction port and the additional suction ports from the machine unit to be supplied towards the fluid pumping module, in particular towards the reservoir.

[0019] The suction port is preferably fluidically connected to the module chamber, in particular the reservoir, via a suction channel. This means that fluid can preferably flow from the housing of the machine unit to be supplied towards the reservoir via the suction port. The suction channel can be formed within the module housing. Preferably, the suction channel is formed by the module housing.

[0020] The fluid delivery module preferably comprises at least one suction pump. The suction pump can draw fluid from the machine assembly, in particular from the assembly housing. The suction pump may include a pump housing. The suction pump comprises at least one fluid inlet and at least one fluid outlet. The suction pump can draw in the fluid to supply the machine assembly via the at least one fluid inlet and discharge it via the at least one fluid outlet.

[0021] Preferably, the suction pump can comprise a first fluid inlet and a first fluid outlet, as well as a second fluid inlet and a second fluid outlet. In particular, the suction pump can comprise four fluid inlets: the first fluid inlet, the second fluid inlet, a third fluid inlet, and a fourth fluid inlet. The at least one fluid inlet and the at least one fluid outlet can be formed by a pump housing. If the suction pump comprises multiple fluid inlets and / or multiple fluid outlets, each fluid inlet and / or each fluid outlet can be formed by the pump housing.

[0022] The suction pump, in particular a low-pressure side of the suction pump, can be connected to the machine unit via at least one fluid inlet, in particular via a fluid connection. If the suction pump comprises several fluid inlets, the suction pump, in particular the low-pressure side of the suction pump, can be connected to the machine unit via each fluid inlet, in particular via a fluid connection. In alternative embodiments, the suction pump can, for example, be connected to the machine unit via three of its four fluid inlets and to another machine unit or to a region of the module chamber away from the reservoir via the fourth fluid inlet.

[0023] The suction pump, in particular a high-pressure side of the suction pump, can be fluidically connected to the module chamber, in particular to the reservoir, via the at least one fluid outlet. If the suction pump comprises several fluid outlets, the suction pump, in particular the high-pressure side of the suction pump, can be fluidically connected to the module chamber, in particular to the reservoir, via each fluid outlet.

[0024] The at least one fluid inlet is preferably fluidically connected to the at least one suction port via the suction channel. In particular, the suction pump can draw fluid from the housing of the machine unit to be supplied via the fluid inlet, the suction channel, and the suction port when the fluid delivery module is installed. Specifically, the suction channel can connect the suction pump, especially the low-pressure side of the suction pump, to the suction port. Preferably, the fluid is actively drawn from the housing by the suction pump, so that the fluid does not flow solely by gravity towards the reservoir.

[0025] The pump housing of the suction pump can be wholly or partially integrated into the module housing. In particular, the pump housing can be wholly or partially formed by the module housing. Alternatively, the pump housing is manufactured separately from the module housing. Preferably, the pump housing of the suction pump is connectable to the module housing.

[0026] Preferably, the fluid outlet is formed within an outer perimeter of the module housing when viewed axially from above. In particular, the fluid outlet can be formed within the outer perimeter of the circumferential wall of the module housing when viewed axially from above. Preferably, the fluid outlet is formed within an outer perimeter of the module chamber when viewed axially from above. If the fluid conveying module is separated from the machine assembly, i.e., if the fluid conveying module is not connected to the machine assembly, the fluid outlet preferably opens into the vicinity of the fluid conveying module.

[0027] When the fluid conveying module is used as intended, the fluid outlet is preferably configured vertically above a fluid level in the reservoir. In particular, when the fluid conveying module is used as intended, the fluid outlet can open vertically above the fluid level of the fluid stored in the reservoir. In preferred embodiments, the fluid outlet overlaps the reservoir when viewed axially from the module housing. In particular, when the fluid conveying module is used as intended, the fluid outlet projects vertically beyond the module housing.

[0028] The pump housing and / or the fluid outlet can be formed within an outer perimeter of the module housing when viewed axially from above. In particular, the fluid outlet can be formed in or through the pump housing. The suction pump or the pump housing of the suction pump can be formed within an outer perimeter of the module housing when viewed axially from above, especially within the circumferential wall of the module housing. In particular, when the fluid conveying module is used as intended, the pump housing projects at least partially beyond the module housing in the vertical direction. In particular, the suction pump can project at least partially out of the trough-shaped module housing. That is, preferably the vertical extent of the circumferential wall of the module housing is less than the axial extent of the pump housing of the suction pump.

[0029] Preferably, the suction pump is located adjacent to the reservoir. In alternative embodiments, the suction pump can overlap the reservoir in an axial view of the module housing. For example, the suction pump can be located within the reservoir. In particular, the reservoir can at least partially, and preferably completely, surround the suction pump in an axial view of the module housing.

[0030] The pump housing can be one-piece or multi-piece. In preferred embodiments, the pump housing is at least two-piece. The pump housing can comprise a housing cover and a housing shell. The housing cover and the housing shell can axially surround a pump chamber at its end faces and circumferentially. When the pump is mounted on or in the module housing, the housing cover is preferably formed on an end face facing axially away from the module housing. In particular, when the fluid conveying module is used as intended, the housing cover is formed vertically at the top. Preferably, when the fluid conveying module is used as intended, the housing cover is formed vertically above the housing shell.

[0031] The term "pump chamber" refers specifically to the entire space enclosed by the pump housing, in which the essential components for conveying the fluid and / or for defining one or more delivery chambers of the suction pump are located. The term "delivery chamber" refers to the portion of the pump chamber in which the mechanical energy of a conveying element, such as a rotor, is transferred to the fluid, particularly by increasing the pressure and / or the fluid's motion. Specifically, one or more conveying elements may be located within the delivery chamber; for example, at least one rotor may be located within the delivery chamber. The delivery chamber is part of the pump chamber. In addition to the delivery chamber, the pump chamber may include additional channels, control chambers, and / or a valve chamber, or the like.

[0032] The housing cover can define the axial end and circumferential boundaries of the pump chamber. Alternatively, the housing cover can define the axial end only. The housing shell can define the axial end and / or circumferential boundaries of the pump chamber. For example, the housing shell can define the axial end only. Alternatively, the housing shell can define the circumferential boundaries only.

[0033] When a suction pump is mounted on the module housing, the pump chamber can be axially delimited by the module housing on the end face opposite the housing cover. In particular, the housing cover can be joined to the module housing so that the housing cover and the module housing together delimit the pump chamber axially on both sides and circumferentially. Alternatively, the housing cover, the housing shell, and the module housing can axially delimit the pump chamber on both ends and circumferentially.

[0034] In preferred embodiments, the suction pump is designed as a pump module, which can be joined to the fluid conveying module, including the module housing. The suction pump can be screwed, glued, welded, or otherwise joined to the module housing. A module, particularly the pump module and / or the fluid conveying module, is understood to be a unit or component that can be part of a larger system, and which can be mounted as an independent element. In particular, a module can interact with other modules to perform a specific function.

[0035] In particular, for the purposes of this application, a module is understood to be a standardized component or assembly that can be used in various systems. Specifically, a module can be manufactured and assembled as a single unit. The suction pump, in particular, can be operated independently. The fluid conveying module is preferably a fully assembled unit that can be mounted, for example, on the machine unit to be supplied with fluid. The fluid conveying module can, in particular, be manufactured without the machine unit.

[0036] The fluid conveying module can include a defoaming structure for defoaming the fluid. The defoaming structure is preferably formed within an outer perimeter of the module housing in an axial view. In particular, the defoaming structure can overlap the reservoir in an axial view of the module housing. When the fluid conveying module is used as intended, the defoaming structure is preferably formed vertically below the fluid outlet(s) of the suction pump. In particular, the fluid can flow from the fluid outlet over the defoaming structure, especially along a surface of the defoaming structure, towards the reservoir.

[0037] The defoaming structure can, for example, mechanically defoam the fluid. In particular, the defoaming structure can destroy foam formed in or by the fluid. Specifically, the defoaming structure can destroy bubbles formed in the fluid, especially by bursting them. The surface of the defoaming structure can, for example, be structured. In particular, the surface of the defoaming structure can have structures and / or obstacles, such as grooves, channels, protrusions, or ledges, which can cause the bubbles in the fluid to burst as it flows.

[0038] Alternatively or additionally, the surface of the defoaming structure can, for example, have a special coating and / or surface treatment that promotes and / or causes the defoaming of the fluid. For example, the defoaming structure can have a rough surface or surfaces with irregular features that destabilize the foam.

[0039] High surface roughness can increase the shear forces in the fluid flowing off the defoaming structure, thereby reducing the foam's stability and / or destroying it. High surface roughness may be inherent to the material of the defoaming structure, for example, when using sintered materials or cast iron. Alternatively or additionally, the roughness can be increased by a special coating and / or a mechanical surface treatment of the defoaming structure, such as brushing, grinding, or sandblasting.

[0040] The defoaming structure can be formed by an outer surface of the pump housing. The outer surface of the pump housing can constitute the defoaming structure entirely or partially. In particular, the defoaming structure can be formed by an outer surface of the housing cover and / or the housing shell. The surface of the pump housing can, due to the manufacturing process, for example, sintering or casting, have an inherently high surface roughness without post-processing. Using the outer surface of the pump housing thus has the advantage that an expensive surface treatment of the defoaming structure can be avoided. Preferably, the surface of the pump housing has additional structures, such as grooves, channels, projections, or steps, that promote defoaming of the fluid.

[0041] The term "outer surface" refers to the surface of the pump housing facing away from the pump chamber. Under normal operating conditions, the outer surface of the pump housing is preferably located within the module chamber. The term "outer" should not be interpreted restrictively to mean that the outer surface must be in contact with an external environment when the fluid pump module is used as intended.

[0042] When the fluid conveying module is used as intended, the fluid outlet can open vertically from the top of the pump housing, in particular from the housing cover and / or the housing shell, so that fluid exiting the fluid outlet can flow off over the outer surface of the pump housing, in particular over an outer surface of the housing cover and / or the housing shell.

[0043] The fluid outlet can protrude from the pump housing. In particular, when the fluid delivery module is used as intended, the fluid outlet can protrude vertically upwards from the pump housing. The fluid outlet can protrude from the pump housing in such a way that its opening points vertically upwards when the fluid delivery module is used as intended. This means that fluid flowing from the fluid outlet is preferably conveyed upwards against gravity. In particular, the suction pump is designed so that it only has to convey the fluid against gravity and ambient pressure, so that the fluid can, for example, overflow from the fluid outlet.

[0044] The fluid outlet can be designed in a fountain-like manner. This means that, when the fluid delivery module and suction pump are used as intended, the fluid preferably emerges from the fluid outlet in a bubbling, splashing, and / or spraying manner, preferably against gravity and ambient pressure. A fountain-like fluid outlet should not be understood to mean that the fluid emerges from the fluid outlet in the form of a fountain, but rather that it flows overflowing from the fluid outlet. Similar to a fountain, the suction pump preferably pumps the fluid from the reservoir vertically upwards and expels it upwards through the fluid outlet. Preferably, when used as intended, the fluid can emerge from the fluid outlet in a bubbling or overflowing manner and flow along the outer surface of the pump housing towards the reservoir.

[0045] In particular, the fluid outlet can project from the housing shell or the housing cover. In preferred embodiments, the fluid outlet projects from the housing cover. In particular, when the fluid conveying module is used as intended, the fluid outlet can project vertically upwards from the housing cover. The at least one fluid outlet can overlap the pump housing, in particular the housing cover and / or the housing shell, when viewed axially from above.

[0046] The fluid outlet can protrude from the pump housing, particularly from the housing shell or the housing cover, in the form of a nozzle. The nozzle can protrude straight from the pump housing, especially when the fluid delivery module is used as intended, projecting vertically upwards. The fluid outlet can, for example, protrude from the pump housing like a chimney. Alternatively, the nozzle can be curved. For example, when the fluid delivery module is used as intended, the nozzle can protrude laterally from the pump housing, particularly from the housing shell or the housing cover, and be curved in such a way that the opening of the fluid outlet points vertically upwards.

[0047] If the suction pump includes a first fluid outlet and a second fluid outlet, the first fluid outlet and the second fluid outlet may protrude from the pump housing. In particular, when the fluid delivery module is used as intended, the first fluid outlet and the second fluid outlet may protrude vertically upwards from the pump housing. Specifically, the first fluid outlet and / or the second fluid outlet may protrude from the housing shell or the housing cover. For example, the first fluid outlet may protrude from the housing cover and the second fluid outlet from the housing shell.

[0048] The first fluid outlet and / or the second fluid outlet may project from the pump housing, in particular from the housing shell or the housing cover, in the form of a nozzle. The nozzle may project straight from the pump housing, especially when the fluid delivery module is used as intended, projecting vertically upwards. Alternatively, the nozzle may be bent. For example, when the fluid delivery module is used as intended, the nozzle may project laterally from the pump housing, in particular from the housing shell or the housing cover, and be bent in such a way that the opening of the first fluid outlet and / or the second fluid outlet points vertically upwards.

[0049] If the suction pump is designed with multiple outlets, particularly dual outlets, the first and second fluid outlets can exit the pump housing together as a single outlet. This means that the first and second working fluids meet within the pump housing. For example, the first and second fluid outlets can protrude from the pump housing as a single, shared nozzle.

[0050] The module housing can include a seal on its open end face when disassembled. In an axial view of the module housing, the seal can partially, preferably completely, follow the outer perimeter of the module housing. In particular, in an axial view of the module housing, the seal can substantially follow the contour of the outer perimeter of the module housing and / or an outer perimeter of the module chamber. In an axial view of the module housing, the seal can at least partially, preferably completely, overlap the circumferential wall of the module housing. In particular, in an axial view of the module housing, the seal can at least partially, preferably completely, overlap the circumferential wall in the circumferential direction.

[0051] When the module housing is mounted on the machine assembly, particularly on the assembly housing, the seal can fluidly seal the module chamber. Specifically, the module housing can be fluidly sealed off from the assembly housing by means of the seal when mounted.

[0052] The suction pump can be designed with multiple channels, particularly with multiple circuits. The suction pump can be a rotary pump, particularly an external gear pump. Preferably, the suction pump is an external gear pump with at least two, preferably three or four, gears. In particular, the suction pump can be an external gear pump with a first gear and a second gear. In particular, the suction pump can be an external gear pump with a first gear, a second gear, and a third gear. In particular, the suction pump can be an external gear pump with exactly three gears. In alternative embodiments, the suction pump can be a planetary gear pump with a first gear, a second gear, a third gear, and a fourth gear. In particular, the suction pump can be a planetary gear pump with exactly four gears.

[0053] If the suction pump comprises three gears, the second gear is preferably located between the first and third gears. Preferably, the planes of rotation of the first, second, and third gears lie on the same axis when viewed axially from above. The planes of rotation of the first, second, and third gears are preferably parallel to each other. In particular, the second gear can mesh with both the first and third gears. Preferably, the first and third gears have the same direction of rotation. In particular, the first and third gears have a different direction of rotation than the second gear.

[0054] If the suction pump is a planetary gear pump with four gears, the second gear is preferably positioned centrally between the first, third, and fourth gears. The second gear can also be called the sun gear, while the first, third, and fourth gears can each be called planet gears. Preferably, the axes of rotation of the first, second, third, and fourth gears do not lie on the same axis when viewed axially. Rather, the first, third, and fourth gears are preferably evenly spaced around the second gear, particularly at angular intervals of 120°, when viewed axially. The axes of rotation of the gears are preferably parallel to each other. In particular, the second gear can mesh with the first, third, and fourth gears.Preferably, the first, third, and fourth gears have the same direction of rotation. In particular, the first, third, and fourth gears have a different direction of rotation than the second gear.

[0055] If the suction pump comprises three or four gears, preferably the second gear, in particular the middle gear, is driven. In particular, the second gear can be driven by means of a drive mechanism. For example, the second gear can be connected to a drive shaft in a rotationally fixed manner, in particular in a rotationally fixed and axially fixed manner. The second gear can, for example, be manufactured together with the drive shaft or can be pushed, in particular fitted, onto the drive shaft.

[0056] The drive shaft can project into or through the second gear. The drive shaft is preferably supported axially on both sides of the second gear within the pump housing. More preferably, the drive shaft is supported axially on both sides of the second gear by the housing shell and the housing cover of the suction pump housing. In alternative designs, the drive shaft can be cantilevered. In particular, the drive shaft can be cantilevered by the housing shell or the housing cover.

[0057] The drive shaft can be connected to the drive in a torque-transmitting manner, in particular in a rotationally fixed manner. If the drive is an electric motor, a rotor of the electric motor can be connected to the drive shaft in a rotationally fixed manner, in particular in a rotationally fixed and axially fixed manner. The rotor can, for example, be pushed onto the drive shaft, in particular by being plugged in.

[0058] The first gear and / or the third gear and / or, if present, the fourth gear can be axially supported on both sides within the pump housing. Preferably, the first gear and / or the third gear and / or, if present, the fourth gear are axially supported on both sides by the housing shell and the housing cover of the suction pump housing. In alternative designs, the first gear and / or the third gear and / or, if present, the fourth gear can be cantilevered. In particular, the first gear and / or the third gear and / or, if present, the fourth gear can be cantilevered by the housing shell or the housing cover.

[0059] The following describes in more detail the design of a suction pump with three gears, in particular exactly three gears, namely the first gear, the second gear, and the third gear. If the suction pump additionally includes a fourth gear, the number of described working fluids and fluid outlets preferably increases by one, while the number of fluid inlets, suction ports, etc., increases by two.

[0060] The first gear, the second gear, and preferably the third gear can be mounted in meshing configurations within the pump chamber of the suction pump. The first gear can form a first pumping chamber with a first section of an inner circumferential wall of the pump housing or an inner surface of a contour ring that radially surrounds the first, second, and third gears. The second gear can form a second pumping chamber with a second section of the inner circumferential wall of the pump housing or the inner surface of the contour ring (different from the first section), and a third pumping chamber with a third section. The third gear can form a fourth pumping chamber with a fourth section of the inner circumferential wall of the pump housing or the inner surface of the contour ring.

[0061] The first gear and the second gear can convey the fluid of the first working flow. Specifically, the first gear and the second gear can convey the fluid of the first working flow through the first and second conveying chambers. The second gear and the third gear can convey the fluid of the second working flow. Specifically, the fluid of the second working flow can be conveyed through the third and fourth conveying chambers. In other words, the first and second conveying chambers constitute at least part of the first working flow, and the third and fourth conveying chambers constitute part of the second working flow.

[0062] The suction pump's fluid inlet can be a first fluid inlet. In addition to the first fluid inlet, the suction pump can include a second, a third, and a fourth fluid inlet. The suction pump can be connected to the module housing on its low-pressure side via the first, second, third, and fourth fluid inlets.

[0063] The suction port can be a first suction port. The fluid conveying module can include a second suction port in addition to the first. Furthermore, the fluid conveying module can include a third suction port and a fourth suction port. Fluid preferably flows from the housing of the machine unit being supplied towards the reservoir via the suction ports.

[0064] If the fluid conveying module comprises more than one suction port, the module housing is preferably fluidically leak-tight connectable to the machine unit, in particular the unit housing of the machine unit, via at least half of the suction ports. If the fluid conveying module comprises, for example, four suction ports, the module housing can be connected to the unit housing via at least two, and in particular at least three, of the suction ports. In particular, the module housing can be fluidically leak-tight connectable to the machine unit, in particular the unit housing, via each suction port.

[0065] If the fluid conveying module includes multiple suction ports, particularly four suction ports, the module housing can, in alternative configurations, be fluidically sealed to the machine unit, especially the unit housing, via only some of the suction ports. For example, the module housing can be connected to another machine unit, another reservoir, or the like via one suction port, such as the fourth.

[0066] The module housing can be fluidically connected to the unit housing of the machine to be supplied via the first suction port. Furthermore, the module housing can be fluidically connected to the unit housing of the machine to be supplied via the second suction port, the third suction port, and preferably the fourth suction port.

[0067] The suction ports, in particular the first suction port, the second suction port, the third suction port and / or the fourth suction port, can be designed to connect the fluid conveying module to the machine unit, in particular to connect it fluidically. In particular, fluid can flow from the machine unit towards the reservoir via each of the suction ports, in particular via the first suction port, the second suction port, the third suction port and / or the fourth suction port, and in particular be drawn off.

[0068] The suction channel can be a first suction channel. The fluid conveying module can include a second suction channel in addition to the first. Furthermore, the fluid conveying module can include a third suction channel and a fourth suction channel. The suction connections, in particular the first suction connection, the second suction connection, the third suction connection, and / or the fourth suction connection, are preferably fluidically connected to the suction pump and / or the module chamber, in particular the reservoir, via one of the suction channels each.

[0069] The second suction port can be fluidically connected to the suction pump via the second suction channel and to the module chamber, particularly the reservoir, via the suction pump. The third suction port can be fluidically connected to the suction pump via the third suction channel and to the module chamber, particularly the reservoir, via the suction pump. The fourth suction port can be fluidically connected to the suction pump via the fourth suction channel and to the module chamber, particularly the reservoir, via the suction pump. In particular, fluid can flow from the housing of the machine unit to be supplied towards the reservoir via the first suction port, the second suction port, the third suction port, and / or the fourth suction port. Preferably, fluid from the housing can only flow towards the reservoir via the respective suction ports and their associated suction channels.

[0070] Each suction channel, or individual suction channels, can be formed within the module housing. In particular, the suction channels can be formed by the module housing itself. Alternatively, individual suction channels can be formed, for example, by separate lines.

[0071] The module housing can be one-piece or multi-piece. Preferably, the module housing is formed in at least two parts, wherein the module housing preferably comprises a first housing part and a second housing part. The first suction channel, the second suction channel, the third suction channel and / or the fourth suction channel can be formed by the first housing part and / or the second housing part.

[0072] Preferably, the first suction channel, the second suction channel, the third suction channel, and / or the fourth suction channel are formed between the first housing part and the second housing part. In particular, when the fluid conveying module is used as intended, the first housing part can limit the first suction channel, the second suction channel, the third suction channel, and / or the fourth suction channel vertically at the bottom, while the second housing part limits the corresponding suction channel(s) vertically at the top.

[0073] The first, second, third, and fourth suction ports can be spaced apart from one another within the module housing. In particular, the first, second, third, and fourth suction ports can each be located at a corner of the end face of the module housing when viewed axially from the outside in its disassembled state. The module housing can be substantially rectangular when viewed axially from its end face when disassembled.

[0074] In particular, the first, second, third, and fourth suction ports can have an angular distance of at least 30° to the nearest adjacent suction port relative to an axis of rotation of the suction pump. Specifically, the angular distance of each suction port to the nearest adjacent suction port in the circumferential direction of the module housing, relative to the axis of rotation of the suction pump, can be at least 70° and at most 180°. Preferably, the suction ports have an angular distance of 90° ± 30° to the nearest suction port relative to the axis of rotation of the suction pump.

[0075] The first fluid inlet of the suction pump can be connected to the module housing via a first low-pressure port, in particular in a fluidically tight connection. The second fluid inlet of the suction pump can be connected to the module housing via a second low-pressure port, in particular in a fluidically tight connection. The third fluid inlet of the suction pump can be connected to the module housing via a third low-pressure port, in particular in a fluidically tight connection. The fourth fluid inlet of the suction pump can be connected to the module housing via a fourth low-pressure port, in particular in a fluidically tight connection.

[0076] The first fluid inlet can be connected to the first suction port via the first low-pressure port and the first suction channel. The second fluid inlet can be connected to the second suction port via the second low-pressure port and the second suction channel. The third fluid inlet can be connected to the third suction port via the third low-pressure port and the third suction channel. The fourth fluid inlet can be connected to the fourth suction port via the fourth low-pressure port and the fourth suction channel.

[0077] The first low-pressure connection is formed, in particular, by the downstream end of the first suction channel. The second low-pressure connection is formed, in particular, by the downstream end of the second suction channel. The third low-pressure connection is formed, in particular, by the downstream end of the third suction channel. The fourth low-pressure connection is formed, in particular, by the downstream end of the fourth suction channel.

[0078] The first suction channel preferably extends from the first low-pressure port to the first suction port in the module housing. In particular, the module housing can be connected to the machine unit via the first suction port and to the suction pump via the first low-pressure port. The first suction port can form the upstream end of the first suction channel and / or the first low-pressure port can form the downstream end of the first suction channel.

[0079] The second suction channel preferably extends from the second low-pressure port to the second suction port in the module housing. In particular, the module housing can be connected to the machine unit via the second suction port and to the suction pump via the second low-pressure port. The second suction port can form the upstream end of the second suction channel and / or the second low-pressure port can form the downstream end of the second suction channel.

[0080] The third suction channel preferably extends from the third low-pressure port to the third suction port in the module housing. In particular, the module housing can be connected to the machine unit via the third suction port and to the suction pump via the third low-pressure port. The third suction port can form the upstream end of the third suction channel and / or the third low-pressure port can form the downstream end of the third suction channel.

[0081] The fourth suction channel preferably extends from the fourth low-pressure port to the fourth suction port in the module housing. In particular, the module housing can be connected to the machine unit via the fourth suction port and to the suction pump via the fourth low-pressure port. The fourth suction port can form the upstream end of the fourth suction channel and / or the fourth low-pressure port can form the downstream end of the fourth suction channel.

[0082] The reservoir may be equipped with a suction point for extracting the fluid. In particular, fluid can be extracted from the reservoir via this suction point to supply the machine unit. When the fluid conveying module is used as intended, the suction point is preferably located below the fluid level in the reservoir. That is, the suction point is preferably surrounded by fluid when the fluid conveying module is used as intended.

[0083] The suction point can be connected to a pressure pump or the machine unit via a conveying channel, and in particular, can be fluidically connected. The pressure pump, especially a low-pressure side of the pressure pump, can draw fluid from the reservoir via the suction point and preferably convey it towards the machine unit and / or towards a separate container for storing the fluid.

[0084] The conveying channel can be formed within or through the module housing. It can also be attached to the module housing. In particular, fluid can be conveyed via the conveying channel from the fluid conveying module, especially from the reservoir, towards the machine unit being supplied. The conveying channel can be formed between the first and second housing parts. Specifically, when the fluid conveying module is used as intended, the first housing part can limit the conveying channel vertically at the bottom, while the second housing part limits the conveying channel vertically at the top.

[0085] The delivery channel can extend upstream or downstream of the pressure pump. If the pressure pump is located within the module housing of the fluid delivery module, the delivery channel extends downstream of the pressure pump. If the pressure pump is located outside the module housing, particularly outside the module chamber, the delivery channel extends upstream of the pressure pump.

[0086] The conveying channel can have a channel outlet at its upstream end, which opens into the reservoir at the suction point and / or forms the suction point itself. The suction point can, for example, be located at the upstream end of the conveying channel. The downstream end of the conveying channel can be connected to the pressure pump or the machine unit, in particular by a fluidically tight connection. Specifically, the upstream end of the conveying channel can form the suction point. The conveying channel can open into the reservoir at its upstream end. Particularly when the fluid conveying module is used as intended, the conveying channel can open into the reservoir below the fluid level.

[0087] The downstream end of the conveying channel can form a pressure port on the module housing. The module housing can be connected to the pressure pump or the machine unit via this pressure port. In particular, the module housing can be directly connected to the pressure pump or the machine unit via this pressure port. If the downstream end of the conveying channel is directly connected to the pressure pump, the conveying channel preferably extends from the suction point to the pressure pump. The downstream end of the conveying channel can be fluidically sealed to a pump housing of the pressure pump. In particular, the conveying channel can be located upstream of the pressure pump.

[0088] In alternative configurations, the downstream end of the conveying channel can be connected to the machine unit. In particular, the downstream end of the conveying channel can be directly connected to the machine unit. In this case, the conveying channel can be located between the pressure pump and the machine unit. That is, the conveying channel can preferably extend from the pressure pump to the machine unit. If the downstream end of the conveying channel is connected to the machine unit, the upstream end of the conveying channel is preferably connected to the pressure pump integrated into the module housing.

[0089] If the pressure pump is located upstream of the delivery channel, it can include a suction channel, in particular a suction port, for drawing in the fluid. The suction channel can open into the reservoir and / or be connected to an opening in the module housing that opens into the reservoir. If the pressure pump is located at the upstream end of the delivery channel, the suction point can be formed by a location in the reservoir into which, for example, the suction port of the pressure pump projects. The suction channel, in particular the suction port, can be located on or in the pump housing, with the upstream end of the suction channel, in particular the suction port, opening into the reservoir and the downstream end of the suction channel, in particular the suction port, being connected to the delivery chamber of the pressure pump. The upstream end of the suction channel, in particular the suction port, preferably opens into the reservoir at the suction point.

[0090] The suction point can be formed by an opening in the module housing. The opening is preferably located at the bottom of the reservoir. In normal use, the opening can be located at the lowest point of the reservoir. The opening can simultaneously form the channel opening of the conveying channel or be fluidically connected to the channel opening of the conveying channel, in particular, fluidically sealed. Alternatively, the opening can form a channel opening of the suction nozzle or be fluidically sealed to the channel opening of the conveying channel.

[0091] A filter, such as a mesh screen or sieve, may be installed at the suction point. In particular, a filter may be installed at the upstream end of the conveying channel or the suction channel, especially at the suction nozzle. For example, the filter may cover the channel opening so that the fluid is filtered when it is drawn from the reservoir. The filter may serve, in particular, to remove coarse impurities or solid particles from the fluid.

[0092] The fluid delivery module can include the pressure pump. In particular, the pressure pump can be located in or on the module housing. Specifically, in an axial top view of the module housing, the pressure pump can be located within the outer perimeter of the module housing. The pressure pump can be located within the module chamber. In alternative embodiments, the pressure pump can be located separately from the fluid delivery module.

[0093] The pressure pump can be spaced apart from the suction pump when viewed axially from the module housing. The pressure pump can be located adjacent to the suction pump within the module chamber. If the module housing includes a seal on its open end face when disassembled, the suction pump and the pressure pump can be arranged within the seal when viewed axially from the module housing.

[0094] The pressure pump can draw fluid from the module housing, particularly from the reservoir, and deliver it towards the machine unit to be supplied. Specifically, the pressure pump can discharge the fluid towards the machine unit via the pressure port. Alternatively, the pressure pump can draw the fluid from the reservoir via the pressure port and deliver it towards the machine unit. The pressure port can be formed by the module housing.

[0095] The module housing can be connected to the machine unit to be supplied or to the pump housing of the pressure pump via the pressure connection. The pressure connection can be designed to connect the fluid transfer module, in particular the module housing, to the machine unit or the pump housing of the pressure pump, especially for fluidic connection. Specifically, fluid can flow from the reservoir towards the machine unit via the pressure connection.

[0096] If the pressure pump is located downstream of the pressure port, the fluid can flow to the pressure pump via the delivery channel and the pressure port, and from the pressure pump, for example via another channel, towards the machine unit. If the pressure pump is located upstream of the pressure port, the fluid can flow from the reservoir, for example via a suction port of the pressure pump, to the pressure pump, and from the pressure pump, via the delivery channel and the pressure port, towards the machine unit.

[0097] If the module housing includes a seal on its open end face when disassembled, the pressure connection can be located within the seal when viewed axially from above. Alternatively, the pressure connection can be located outside the seal when viewed axially from above. In the latter case, the pressure connection can have its own seal.

[0098] The suction pump can, for example, form a suction pump module together with the drive unit for driving the suction pump. The drive unit for driving the suction pump can be an electric motor. The pump housing can be designed to accommodate the drive unit or parts of the drive unit, in particular the rotor and a stator of an electric motor. If the suction pump is a gear pump, in particular an external gear pump with three gears, the drive unit preferably drives the second gear.

[0099] The pump housing can, for example, have a receiving shaft in which the drive or parts of the drive can be arranged. In particular, the housing cover or housing shell can form the receiving shaft. The receiving shaft can be formed on a side of the housing cover or housing shell facing axially away from the pump chamber. Preferably, the receiving shaft is formed on the side of the housing shell facing axially away from the pump chamber.

[0100] The receiving shaft can be axially closed by a motor cover. In particular, the motor cover can seal the receiving shaft in a fluid-tight manner. The suction pump module can further include the electronics for the drive, especially for the electric motor. In particular, the suction pump module can include an electronic control unit for the drive. The electronics can be housed in an electronics compartment. The electronics compartment can be bounded at the front and / or around the circumference by an electronics cover. In particular, the electronics compartment can be bounded at the front and / or around the circumference by the motor cover and the electronics cover.

[0101] The suction pump module can extend through the module housing of the fluid conveying module, in particular the bottom of the module housing. Specifically, the suction pump module can extend through the module housing so that the drive or part of the drive, for example the electronics for the drive, is located on a side of the module housing facing away from the reservoir. In particular, the suction pump module can extend through the module housing in such a way that the drive or part of the drive is located on a side of the module housing facing away from the reservoir, and the suction pump is located on the side of the reservoir within the module housing.

[0102] If the drive is an electric motor, the suction pump module can protrude through the module housing, so that the electronics for the electric motor, in particular the electronics compartment, are arranged on a side of the module housing facing away from the reservoir, and the rotor and stator are arranged on the side of the reservoir in the module housing.

[0103] If the fluid handling module includes the pressure pump, the pressure pump, together with a drive unit, can form a pressure pump module. The drive unit can be an electric motor. The pump housing of the pressure pump can be designed to accommodate the drive unit or parts thereof, in particular a rotor and stator of an electric motor.

[0104] The pump housing can, for example, have a receiving shaft in which the drive or parts of the drive can be arranged. The receiving shaft is preferably formed on a side of the pump housing facing axially away from the pump chamber.

[0105] The receiving shaft can be axially closed by a motor cover. In particular, the motor cover can seal the receiving shaft in a fluid-tight manner. The pressure pump module can further include the electronics for the drive, especially for the electric motor. In particular, the pressure pump module can include an electronic control unit for the drive. The electronics can be housed in an electronics compartment. The electronics compartment can be bounded at the front and / or around the circumference by an electronics cover. In particular, the electronics compartment can be bounded at the front and / or around the circumference by the motor cover and the electronics cover.

[0106] The pressure pump module can extend through the module housing of the fluid conveying module, in particular the bottom of the module housing. Specifically, the pressure pump module can extend through the module housing so that the drive or part of the drive, for example the electronics for the drive, is located on a side of the module housing facing away from the reservoir. In particular, the pressure pump module can extend through the module housing such that the drive or part of the drive is located on a side of the module housing facing away from the reservoir, and the pressure pump is located on the side of the reservoir within the module housing.

[0107] If the drive is an electric motor, the pressure pump module can protrude through the module housing, so that the electronics for the electric motor, in particular the electronics compartment, are arranged on a side of the module housing facing away from the reservoir, and the rotor and stator are arranged on the side of the reservoir in the module housing.

[0108] The invention is described below with reference to exemplary embodiments. The features disclosed in the exemplary embodiments advantageously further define the subject matter of the claims and the embodiments described above. The figures show: Fig. 1: Exploded view of a fluid conveying module according to a first embodiment; Fig. 2: Axial top view of a housing cover of the suction pump made of Fig. 1; Fig. 3: Axial top view of a housing shell of the suction pump made of Fig. 1; Fig. 4: Isometric view of the suction pump module and the pressure pump module from Fig. 1; Fig. 5: Isometric view of the module housing from Fig. 1; Fig. 6: Isometric view of a first housing part of the fluid conveying module made of Fig. 1; Fig. 7: Isometric view of the fluid conveying module according to the first embodiment from a low angle; Fig. 8: Isometric view of a fluid conveying module according to a second embodiment; Fig. 9: Axial top view of the fluid conveying module Fig. 8; Fig. 10: axial section through the fluid conveying module made of Fig. 8; Fig. 11: Isometric view of the fluid conveying module according to the second embodiment from a low angle.

[0109] The Fig. Figures 1 to 7 show a fluid conveying module according to a first embodiment, while the Fig. 8 and Fig. Figure 11 shows the fluid conveying module according to a second embodiment. Both the fluid conveying module of the first embodiment and the fluid conveying module of the second embodiment comprise a module housing 300, which is open in the vertical direction, particularly in the z-direction, when the fluid conveying module is used as intended. To illustrate the orientation of the individual components of the fluid conveying module when the fluid conveying module is used as intended, the following is shown in the Fig. Each of the numbers 1 to 11 has a coordinate system drawn in it.

[0110] Fig. Figure 1 shows an exploded view of a fluid supply module for supplying fluid to a machine assembly. The at least one machine assembly, which is not shown in detail, can be an engine and / or a transmission of a motor vehicle. In particular, the machine assembly can be an electric motor for a motor vehicle, comprising an electric motor for propelling the vehicle and a transmission for reducing the speed of the electric motor. The fluid supply module can be a fluid supply module for supplying fluid, in particular oil for lubrication and / or cooling, to an engine and / or a transmission of a motor vehicle.

[0111] The fluid conveying module according to the Fig. 1 to 7 comprise a suction pump module 100 and a pressure pump module 200, which are arranged spaced apart from each other in a module housing 300. The suction pump module 100 and the pressure pump module 200 are in Fig. 4 shown without the module housing 300 in an assembled state.

[0112] The suction pump module 100 comprises a suction pump and a drive 140 for driving the suction pump. The suction pump includes a pump housing with a housing cover 101 and a housing shell 102, which axially delimit a pump chamber at the end face and circumferentially.

[0113] The drive 140 for driving the suction pump is an electric motor 144, 145 with a stator 144 and a rotor 145. The drive 140 further comprises electronics 142 for controlling the electric motor. The electronics 142 can be housed in an electronics compartment, which is bounded axially on both sides and circumferentially, for example, by an electronics cover 141 and a motor cover 143. In alternative embodiments, the electronics compartment can be bounded axially on both sides by the electronics cover 141 and the motor cover 143, with a component forming a circumferential boundary between the electronics cover 141 and the motor cover 143.

[0114] In the present embodiment, the rotor 145 and the stator 144 of the electric motor are formed in a receiving shaft in the housing shell 102 of the suction pump. The receiving shaft is closed on the end face facing axially away from the pump chamber by the motor cover 143, in particular in a fluid-tight manner. In alternative embodiments, the rotor 145 and the stator 144 can, for example, be formed in a motor housing encompassing the motor cover 143, which can be connected, for example, to the pump housing of the suction pump.

[0115] The suction pump is a rotary pump, in particular an external gear pump with a first gear 111, a second gear 112, and a third gear 113. In the present embodiment, the suction pump is an external gear pump with exactly three gears. In alternative embodiments, the suction pump can, for example, also be formed by an external gear pump with two gears. Furthermore, the suction pump can, for example, also be formed by a vane pump or an internal gear pump.

[0116] The gears 111, 112, 113 of the external gear pump are formed in the pump housing 101, 102. The pump housing 101, 102 of the suction pump can, for example, be made of two parts. In alternative designs, the pump housing 101, 102 can also be made of three or four parts.

[0117] The pump housing comprises the housing shell 102 and the housing cover 101, which axially enclose the pump chamber on both sides and circumferentially. In the present embodiment, the pump chamber includes receiving spaces for the gears 111, 112, 113 as well as four suction lines 121', 122', 123', 124' and two discharge lines 131', 132'.

[0118] The pump chamber is, in particular, the space which is axially surrounded and circumferentially bounded by the housing cover 101 and the housing shell 102. The pump chamber can be understood, in particular, as the entire cavity surrounded by the pump housing, whereby the cavity may be subdivided into individual chambers and / or lines. In the present embodiment, the pump chamber comprises at least the receiving spaces for the gears 111, 112, 113, the suction lines 121', 122', 123', 124', and the discharge lines 131', 132'. Fig. Figure 2 shows the part of the pump chamber surrounded by the housing cover 101 in an axial top view. Fig. Figure 3 shows the part of the pump chamber surrounded by the housing shell 102 in an axial top view.

[0119] The housing cover 101 and the housing shell 102 define the pump chamber axially on both sides and circumferentially. In alternative embodiments, the pump cover 101 and the housing shell 102 can, for example, define the pump chamber axially on both sides, with a housing part forming between the housing cover 101 and the housing shell 102, for example, to define the pump chamber circumferentially.

[0120] The suction pump according to the exemplary embodiment of the Fig. The suction pump is designed as a dual-flow pump, specifically a dual-circuit pump. In alternative configurations, the suction pump can also be designed as a single-flow pump. The suction pump comprises a first fluid inlet 121, a second fluid inlet 122, a third fluid inlet 123, and a fourth fluid inlet 124. Furthermore, the suction pump comprises a first fluid outlet 131 and a second fluid outlet 132.

[0121] For example, in Fig. As shown in Figure 2, the first working flow extends from the first fluid inlet 121 and the second fluid inlet 122 via the first suction line 121' and the second suction line 122' to the first fluid outlet 131. That is, the fluid of the first working flow is drawn in via the first fluid inlet 121 and the second fluid inlet 122 and discharged via the first fluid outlet 131.

[0122] The second working flow extends from the third fluid inlet 123 and the fourth fluid inlet 124 via the third fluid line 123' and the fourth fluid line 124' to the second fluid outlet 132. This means that the fluid of the second working flow is drawn in via the third fluid inlet 123 and the fourth fluid inlet 124 and discharged via the second fluid outlet 132.

[0123] In the present embodiment, the first fluid outlet 131 and the second fluid outlet 132 are fluidically separated from each other. In particular, the fluid of the first working flow and the fluid of the second working flow only mix again when flowing back towards the reservoir. That is, in the present embodiment, the fluid of the first working flow and the fluid of the second working flow do not mix. Fig. 1 to 7 only connect to each other after exiting the pump housing. The suction pump is specifically designed as a dual-circuit pump.

[0124] In alternative versions, such as according to the embodiment of the Fig. 8 and Fig. 11. The suction pump can also be designed as a dual-flow pump, whereby the fluid of the first working flow and the second working flow are mixed together before exiting the pump housing. In this case, the suction pump is dual-flow but not dual-circuit. Thus, the suction pump can be, for example, in Fig. 8 shown, comprising only a first fluid outlet 131b through which the fluid of the first working flood and the fluid of the second working flood exit.

[0125] In the exemplary embodiment of the Fig. In sections 1 to 7, the first fluid outlet 131 and the second fluid outlet 132 project from the pump housing, in particular from the housing cover 101. Specifically, when the fluid conveying module is used as intended, the first fluid outlet 131 and the second fluid outlet 132 project upwards in a vertical direction, i.e., in the z-direction, from the pump housing.

[0126] The first fluid outlet 131 and the second fluid outlet 132 project from the pump housing in such a way that their openings, through which the fluid exits the pump housing, point vertically upwards when the fluid conveying module is used as intended. The fluid is thus conveyed upwards against gravity by the suction pump of the suction pump module 100.

[0127] The first fluid outlet 131 and the second fluid outlet 132 are designed in a fountain-like manner. This means that, when the fluid conveying module is used as intended, the fluid preferably emerges from the first fluid outlet 131 and the second fluid outlet 132 in a bubbling and / or splashing manner. The first fluid outlet 131 and the second fluid outlet 132 can, in particular, project from the pump housing, especially the housing cover 101, in a chimney-like manner. When the application refers to a chimney-like or flue-like design, this is intended to express, in particular, that the first fluid outlet 131 and / or the second fluid outlet 132 rise high from the pump housing and are preferably cylindrical, for example, similar to a chimney.

[0128] In alternative configurations, the first fluid outlet 131 and / or the second fluid outlet 132 could, for example, project radially from the pump housing and, when the fluid conveying module is used as intended, bend upwards in a vertical direction. Alternatively, the first fluid outlet and / or the second fluid outlet could project radially from the pump housing or open directly from it.

[0129] The fluid conveying module comprises a module housing 300 with a reservoir 301 for storing the fluid. The reservoir 301 is formed within the module housing 300, the module housing 300 surrounding the reservoir 301 circumferentially and, when the fluid conveying module is used as intended, vertically from below.

[0130] The module housing 300 comprises a circumferential wall and a base, which together define a module chamber on its perimeter and end faces. In particular, the module housing 300 is open vertically upwards when the fluid conveying module is used as intended. Specifically, the module housing 300 is trough-shaped, with the interior of the trough forming the module chamber.

[0131] The fluid can preferably be collected within the circumferential wall of the module housing 300 in the reservoir 301. The reservoir 301 is preferably formed by the module chamber. In alternative embodiments, the reservoir can also be formed by only a part of the module chamber.

[0132] The module housing 300 can be mounted on a unit housing of the machine unit (not shown in detail). When the fluid conveying module is used as intended, the module housing 300 is preferably mounted vertically at the bottom of the unit housing. In a disassembled state of the fluid conveying module, the module housing 300, as shown for example in Fig. Figure 5 shows an upwardly open end face. In the assembled state of the module housing 300, the module housing 300, in particular the module chamber, is preferably closed by the unit housing, in particular in a fluid-tight manner.

[0133] As in Fig. 1 and in Fig. As shown in Figure 5, the fluid conveying module preferably comprises a seal 303 which partially, preferably completely, follows the contour of the circumferential wall of the module housing 300 in an axial top view of the module housing. In particular, in an axial top view of the module housing, the seal 303 partially, preferably completely, overlaps the outer perimeter of the module housing 300, especially the circumferential wall of the module housing 300, in the circumferential direction. When the module housing 300 is mounted on the machine assembly, especially on the assembly housing, the seal 303 provides a fluid-tight seal for the module chamber, especially the reservoir 301. In particular, the module chamber can be fluidly sealed off from the assembly housing by means of the seal 303 when mounted.

[0134] The module housing 300 further comprises a first suction channel 321', a second suction channel 322', a third suction channel 323', and a fourth suction channel 324'. The suction channels are formed in or by the module housing 300. The module housing 300 can, in particular, be formed in two parts, wherein a first housing part and a second housing part preferably lie axially on top of each other, such that the first suction channel 321', the second suction channel 322', the third suction channel 323', and the fourth suction channel 324' can be formed between the first housing part and the second housing part.

[0135] The first suction channel 321' extends from a first low-pressure port 3121 of the module housing 300 to a first suction port 321. The module housing can be connected to the machine unit via the first suction port 321, in particular in a fluidically tight manner. The module housing 300 can be connected to the suction pump, in particular to the first fluid inlet 121 of the suction pump, via the first low-pressure port 3121. The first suction port 321 forms the upstream end of the first suction channel 321', while the first low-pressure port 3121 forms the downstream end of the first suction channel 321'.

[0136] The second suction channel 322' extends from a second low-pressure port 3122 of the module housing 300 to a second suction port 322. The module housing can be connected to the machine unit via the second suction port 322, in particular in a fluidically tight manner. The module housing 300 can be connected to the suction pump, in particular to the second fluid inlet 122 of the suction pump, via the second low-pressure port 3122. The second suction port 322 forms the upstream end of the second suction channel 322', while the second low-pressure port 3122 forms the downstream end of the first suction channel 322'.

[0137] The third suction channel 323' extends from a third low-pressure port 3123 of the module housing 300 to a third suction port 323. The module housing 300 can be connected to the machine unit via the third suction port 323, in particular in a fluidically tight manner. The module housing 300 can be connected to the suction pump, in particular to the third fluid inlet 123 of the suction pump, via the third low-pressure port 3123. The third suction port 323 forms the upstream end of the third suction channel 323', while the third low-pressure port 3123 forms the downstream end of the first suction channel 323'.

[0138] The fourth suction channel 324' extends from a fourth low-pressure port 3124 of the module housing 300 to a fourth suction port 324. The module housing 300 can be connected to the machine unit via the fourth suction port 324, in particular in a fluidically tight manner. The module housing 300 can be connected to the suction pump, in particular to the fourth fluid inlet 124 of the suction pump, via the fourth low-pressure port 3124. The fourth suction port 324 forms the upstream end of the fourth suction channel 324', while the fourth low-pressure port 3124 forms the downstream end of the first suction channel 323'.

[0139] When the fluid conveying module is connected to the machine unit, the suction pump can draw fluid via the first suction port 321, the second suction port 322, the third suction port 323, and the fourth suction port 324 and convey it towards the reservoir 301. According to the exemplary embodiment, the first suction port 321, the second suction port 322, and the third suction port 323 are located, in axial view of the module housing, outside the outer perimeter, in particular outside the circumferential wall, of the module housing 300, and in particular outside the seal 303. The fourth suction port 324 is located, in axial view of the module housing, inside the outer perimeter, in particular inside the circumferential wall, of the module housing 300, and in particular inside the seal 303.In alternative embodiments, the fourth suction port 324 can also be formed outside the outer perimeter, in particular outside the circumferential wall, in particular outside the seal 303, or, as e.g. in the . Fig. 8 and Fig. Figure 9 shows that it is part of the outer perimeter, in particular part of the circumferential wall, of the module housing 300.

[0140] The fluid conveying module according to the first embodiment comprises, in addition to the suction pump module 100, the pressure pump module 200. Like the suction pump module 100, the pressure pump module 200 includes a drive 240. The pressure pump module is essentially designed like the suction pump module 100.

[0141] Unless otherwise stated, the descriptions of the drive 140 and the pump housing 101, 102 of the suction pump module also apply to the pressure pump module 200.

[0142] In the present embodiment, the pressure pump module 200 differs from the suction pump module 100 in that the pressure pump module 200 is an external gear pump with a first gear 211 and a second gear 212. In particular, the pressure pump comprises exactly two gears 211, 212.

[0143] Furthermore, the pressure pump module 200 differs from the suction pump module 100 in that the pressure pump of the pressure pump module 200 is a single-flow design. Specifically, the pressure pump of the pressure pump module 200 comprises a fluid inlet 221 and a fluid outlet 231. The pressure pump can draw fluid from the reservoir 301 via the fluid inlet 221, in particular from a suction point 3221 in the reservoir 301, and discharge it via the fluid outlet 231 towards the machine assembly.

[0144] In the present embodiment, the fluid inlet 221 of the pressure pump is designed as a suction port, which projects from the pump housing, in particular from the housing cover 201, of the pressure pump and extends into the reservoir. Specifically, the fluid inlet 221 extends into the reservoir 301 at the suction point 3221.

[0145] In the exemplary embodiments of the Fig. In figures 1 to 7, the fluid outlet 231 of the pressure pump is connected to a high-pressure port 3231 of the module housing 300, in particular in a fluidically tight manner. The high-pressure port 3231 forms in particular the upstream end of a delivery channel 331', as shown in Fig. Figure 6 shows that the pressure pump module 200, and in particular the pressure pump of the pressure pump module 200, is located upstream of the delivery channel 331'. Specifically, the fluid can flow from the pressure pump via the delivery channel 331' towards the machine assembly. The delivery channel 331' is formed within or by the module housing 300.

[0146] The downstream end of the conveying channel 331' forms a pressure connection 331, via which the fluid conveying module, in particular the module housing 300, can be connected to the machine unit or a supply line to the machine unit. In particular, the pressure pump can convey fluid from the reservoir towards the machine unit via the conveying channel 331'. As in Fig. As can be seen in Figure 5, the pressure connection 331 is formed in axial plan view of the module housing 300 within the outer perimeter or within the circumferential wall of the module housing 300, in particular within the seal 303.

[0147] The fluid conveying module also includes a defoaming structure 103 for defoaming the fluid. When the fluid conveying module is used as intended, the defoaming structure 103 is positioned vertically below the first fluid outlet 131 and / or the second fluid outlet 132.

[0148] In the present embodiment, the defoaming structure 103 is formed by the outer surface of the pump housing, in particular by the outer surface of the housing cover 101. In this way, the fluid can flow from the first fluid outlet 131 and / or the second fluid outlet 132 over the defoaming structure 103, in particular along a surface of the defoaming structure 103, towards the reservoir 301. In alternative embodiments, the defoaming structure 103 can, for example, be formed by a separate component that extends vertically below the first fluid outlet 131 and / or the second fluid outlet 132.

[0149] In particular, the fluid can escape from the first fluid outlet 131 and / or the second fluid outlet 132, especially against gravity, and can flow towards the reservoir 301 following gravity along the defoaming structure formed in a vertical direction below the first fluid outlet 131 and the second fluid outlet 132.

[0150] The defoaming structure 103, in particular its surface, can be structured. For example, the surface of the defoaming structure 103 can have structures and / or obstacles, such as grooves, channels, protrusions or steps, which can cause the fluid to defoam as it flows.

[0151] In the Fig. 8 and Fig. Figure 11 shows a fluid conveying module according to a second embodiment. Provided that features and / or statements relating to the fluid conveying module of the first embodiment do not contradict the fluid conveying module of the second embodiment, the statements regarding the Fig. 1 to 7 also apply to the fluid conveying module of the second embodiment.

[0152] The fluid conveying module of the second embodiment differs from the fluid conveying module of the first embodiment essentially in that, in addition to the suction pump module 100b, the fluid conveying module of the second embodiment does not include a pressure pump or pressure pump module 200, which, in an axial top view of the module housing 300, is formed next to the suction pump module 100b within an outer perimeter of the module housing 300. The pressure pump module or pressure pump of the second embodiment can be formed separately from the fluid conveying module of the second embodiment or, for example, be formed externally on the module housing 300 of the fluid conveying module.

[0153] The suction pump module 100b of the second embodiment differs from the suction pump module 100 of the first embodiment in that the suction pump module 100b comprises only one fluid outlet 131b. That is, the suction pump of the suction pump module 100b is designed with two outlets but not with two circuits.

[0154] As in Fig. 9 in combination with Fig. As can be seen in Figure 10, the suction pump of the second embodiment also comprises three gears 111, 112, 113, which convey the fluid of the first working flow and the fluid of the second working flow to the one fluid outlet 131b. In particular, the fluid of the first working flow and the fluid of the second working flow mix with each other in the fluid outlet 131b before exiting the pump housing 101, 102.

[0155] Furthermore, the fluid conveying module of the second embodiment differs in that the conveying channel 331b' is located upstream of the pressure pump module (not shown in detail). The conveying channel 331b' of the second embodiment extends from the suction point 3221 to a pressure port 331b. In contrast to the fluid conveying module of the first embodiment, the pressure port 331b of the second embodiment serves to connect the fluid conveying module to a pressure pump. That is, the pressure pump or pressure pump module of the second embodiment is located downstream of the conveying channel 331b'. Thus, the fluid can flow from the reservoir to the pressure pump or pressure pump module via the conveying channel 331b'.

[0156] This means that the pressure pump of the second embodiment does not draw the fluid from the reservoir 301 directly from the reservoir 301 via a fluid inlet 221 belonging to the pressure pump, for example in the form of a suction nozzle, but via the delivery channel 331b'.

[0157] In contrast to the fluid conveying module of the first embodiment, the conveying channel 331b' of the second embodiment does not open at its upstream end into a high-pressure port 3231 but into the reservoir 301. That is, unlike the conveying channel 331' of the first embodiment, the fluid in the conveying channel 331b' of the second embodiment does not flow from the pressure pump to the machine unit, but from the module housing towards a pressure pump. Specifically, the conveying channel 331b' opens at its upstream end into the reservoir 301 at the bottom of the module housing 300. Reference symbol list 100 Suction pump module 101 Case Cover 102 Housing shell 103 Defoaming structure 111 first gear 112 second gear 113 third gear 121 first fluid inlet 122 second fluid inlet 123 third fluid inlet 124 fourth fluid inlet 131 first fluid outlet 131b first fluid outlet of the second embodiment 132 second fluid outlet 140 Drive of the suction pump 141 Electronic cover 142 Electronics 143 Engine cover 144 Stator of the electric motor 145 Rotor of the electric motor 200 pressure pump module 201 Case cover 202 Housing shell 211 first gear 212 second gear 221 Fluid inlet 231 Fluid outlet 240 Drive of the pressure pump 241 Electronic cover 242 Electronics 243 Engine cover 244 Stator of the electric motor 245 Rotor of the electric motor 300 module housings 301 Reservoir 302 Seal 321 first suction port 321' first suction channel 322 second suction port 322' second suction channel 323 third suction port 323' third suction channel 324 fourth suction port 324' fourth suction channel 331 Pressure connection 331b Pressure connection of the second embodiment 331' Conveyor channel 331b' Conveyor channel of the second embodiment 3121 first low-pressure connection 3122 second low-pressure connection 3123 third low-pressure connection 3124 fourth low-pressure connection 3221 Suction point 3231 High-pressure connection

Claims

[1] Fluid supply module for supplying a machine assembly with fluid, in particular for supplying an electric motor and / or a transmission of a motor vehicle with oil, comprising: 1.

1. a module housing (300) with a reservoir (301) for storing the fluid, at least one suction port (321) and a suction channel (321'), 1.

2. a suction pump with a pump housing (101, 102), a fluid inlet (121) and a fluid outlet (131; 131b), wherein 1.

3. the suction channel (321') is formed in the module housing (300), preferably by the module housing (300), and the suction channel (321') connects the suction pump, in particular a low-pressure side of the suction pump, via the fluid inlet (121) to the suction port (321), and 1.

4. the suction port (321) can be connected fluidically tight to a unit housing of the machine unit to be supplied, and 1.

5. the fluid outlet (131; 131b) is formed within an outer perimeter (302) of the module housing (300) in axial plan view, and the fluid outlet (131; 131b) opens vertically above a fluid level of the reservoir (301) when the fluid conveying module is used as intended. [2] Fluid conveying module according to the preceding claim, wherein the fluid conveying module comprises a defoaming structure (103) and wherein the defoaming structure (103) is formed in a vertical direction below the fluid outlet (131; 131b) when the fluid conveying module is used as intended, so that the fluid can flow from the fluid outlet (131; 131b) via the defoaming structure (103) towards the reservoir (301). [3] Fluid conveying module according to the preceding claim, wherein the defoaming structure is formed by an outer surface of the pump housing (101, 102), in particular by the outer surface of a housing cover (101). [4] Fluid conveying module according to one of the preceding claims, wherein the fluid outlet (131; 131b) is designed like a fountain. [5] Fluid conveying module according to one of the preceding claims, wherein the suction pump is arranged in axial plan view of the module housing (300) within the outer perimeter (302) of the module housing (300), in particular in or adjacent to the reservoir (301). [6] Fluid conveying module according to one of the preceding claims, wherein the fluid outlet (131; 131b) projects from the pump housing (101, 102), preferably from a housing cover (101) of the pump housing (101, 102), and wherein the fluid outlet (131; 131b) projects upwards from the pump housing (101, 102) in particular when the fluid conveying module is used as intended. [7] Fluid conveying module according to one of the preceding claims, wherein the module housing (300) can be mounted on the unit housing of the machine unit to be supplied, is preferably mounted at the bottom of the unit housing when the fluid conveying module is used vertically, and the module housing (300) is open to the environment at one of its end faces in a disassembled state and is limited at the end face open in the disassembled state by the unit housing, in particular sealed in a fluid-tight manner, in a mounted state. [8] Fluid conveying system according to the preceding claim, wherein the module housing (300) comprises a seal (302) at its end face which is open in the disassembled state and the module housing (300) is fluidically sealed off from the unit housing by means of the seal (302) in the assembled state. [9] Fluid conveying module according to one of the preceding claims, wherein the suction pump is a multi-flow, in particular multi-circuit, external gear pump with a first gear (111), a second gear (112) and a third gear (113) which are mounted meshing in a pump chamber of the suction pump, and wherein the fluid of a first working flow is conveyed by the first gear (111) and the second gear (112) and the fluid of a second working flow is conveyed by the second gear (112) and the third gear (113), wherein the external gear pump preferably comprises exactly three gears. [10] Fluid conveying module according to one of the preceding claims, wherein the fluid inlet (121) is a first fluid inlet (121), and wherein the suction pump can be connected to the machine assembly on its low-pressure side via the first fluid inlet (121), a second fluid inlet (122), a third fluid inlet (123) and a fourth fluid inlet (124) and is fluidically connected to the reservoir (301) on its high-pressure side via the fluid outlet (131; 131b), and optionally via an additional second fluid outlet (132). [11] Fluid conveying module according to the preceding claim, wherein the suction channel (321') is a first suction channel (321') and the suction port (321) is a first suction port (321), and wherein 11.

1. the first fluid inlet (121) is connected to the first suction port (321) via a first connection (3121) formed in the module housing (300) and via the first suction channel (321') formed in the module housing (300), 11.

2. the second fluid inlet (122) is connected to a second suction port (322) via a second connection (3122) formed in the module housing (300) and via a second suction channel (322') formed in the module housing (300), 11.

3. the third fluid inlet (123) is connected to a third suction port (323) via a third port (3123) formed in the module housing (300) and via a third suction channel (323') formed in the module housing (300), and wherein 11.

4. the fourth fluid inlet (124) is connected to a fourth suction port (324) via a fourth port (3124) formed in the module housing (300) and via a fourth suction channel (324') formed in the module housing (300). [12] Fluid conveying module according to the preceding claim, wherein 12.

1. the first suction port (321) can be connected fluidically tight to an assembly housing of the machine assembly, 12.

2. the second suction port (322) can be connected fluidically tight to the unit housing of the machine unit, 12.

3. the third suction port (323) can be connected fluidically tight to the unit housing of the machine unit, and wherein 12.

4. the fourth suction port (324) can be connected fluidically tight to the unit housing of the machine unit, so that fluid can be extracted from the unit housing via each of the suction ports (32, 322, 323, 324). [13] Fluid conveying module according to one of the two preceding claims, wherein the first suction port (321), the second suction port (322), the third suction port (323) and the fourth suction port (324) are spaced apart from each other in the module housing (300), in particular in axial plan view of the end face open to the environment in the disassembled state of the housing according to claim 6, each being formed at a corner of the end face of the module housing (300). [14] Fluid conveying module according to one of the preceding claims, wherein a suction point (3221) for suctioning the fluid is formed in the reservoir (301), and wherein the fluid conveying module preferably comprises a pressure pump which suctions the fluid from the reservoir (301) via the suction point (3221) and conveys it in the direction of the machine unit to be supplied. [15] Fluid conveying module according to one of the preceding claims, wherein the fluid conveying module comprises a pressure pump arranged in an axial plan view of the module housing (300) within the outer perimeter (302) of the module housing (300), and wherein the suction pump and the pressure pump are spaced apart from each other in an axial plan view of the module housing (300), in particular radially within the seal (302) according to claim 7, in the module housing (300). [16] Fluid conveying module of one of the two preceding claims in combination with claim 7, wherein the pressure pump draws the fluid from the reservoir (300) via a suction point (3221) formed radially inside the seal (302) and discharges it towards the machine assembly via a pressure outlet (331) formed radially inside the seal (302) in the housing (301). [17] Fluid conveying module according to one of the preceding claims, wherein 17.

1. the suction pump together with a drive (140), in particular an electric motor, for driving the suction pump forms a suction pump module (100; 100b), and wherein the suction stage module (100; 100b) preferably extends through the module housing (300), so that the drive (140) is arranged on a side of the module housing (300) facing away from the reservoir (301), 17.

2. and wherein the pressure pump according to one of claims 12 to 14, if present, together with a drive (240), in particular an electric motor, for driving the pressure pump forms a pressure pump module (200), and wherein the pressure stage module (200) extends through the module housing (300) so that the drive (240) is arranged on a side of the module housing (300) facing away from the reservoir (301).

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