Oil storage and oil filtration device, gearbox, and use of an oil storage and oil filtration device

Abstract

The invention relates to an oil storage and oil filtration device comprising: - a first region (10), the first region (10) being monolithically designed as an oil-resistant open-pored oil storage medium for receiving oil; and - a second region (20), the second region (20) comprising an oil-resistant filtration medium having fibres for filtering oil, and the second region (20) being connected to the first region (10), preferably being directly connected to the first region (10).

Description

[0001] Oil storage and oil filtration device, gearbox and use of an oil storage and oil filtration device

[0002] The invention relates to an oil storage and oil filtration device, a transmission having an oil storage and oil filtration device and a use of an oil storage and oil filtration device.

[0003] Hydraulic control units are typically used in automatic transmissions or transmissions with automated gear ratio changes. The operating pressure for operating this control unit is generated by a hydraulic pump within a hydraulic circuit. The integration of filters within this hydraulic circuit enables the removal of dirt particles to protect sensitive components such as bearings, gears, and especially the switching valves of the hydraulic control unit.

[0004] Furthermore, the use of a hydraulic circuit makes it possible to direct operating fluids to the relevant components for cooling and lubrication purposes.

[0005] Transmissions without hydraulic control units, such as manual transmissions, often forgo a separate hydraulic circuit for cost reasons, so filter elements are also not used as integrated components in the hydraulic circuit. Cleaning is therefore very limited and is implemented, for example, using magnets to capture ferrous particles. The transmission components must be designed to accommodate the lower oil purity.

[0006] In connection with electromobility, the requirements placed on transmissions have changed, so that concepts can be considered that do not require the use of a separate hydraulic circuit with an active pump.

[0007] The invention is based on the object of providing an improvement or an alternative to the prior art.

[0008] According to a first aspect of the invention, the object is achieved by an oil storage and oil filtration device comprising: a first region, wherein the first region is designed monolithically as an oil-resistant, open-pore oil storage medium for absorbing oil; and a second region, wherein the second region has a filtration medium comprising oil-resistant fibers for filtering oil and wherein the second region is connected to the first region, preferably directly connected to the first region.

[0009] The following term is explained in this regard:

[0010] First of all, it should be expressly pointed out that in the context of this patent application, indefinite articles and numerical expressions such as "one", "two", etc. are generally to be understood as "at least" expressions, i.e. as "at least one...", "at least two...", etc., unless it is expressly clear from the respective context or it is obvious or technically necessary for the person skilled in the art that only "exactly one", "exactly two...", etc. can be meant.

[0011] In the context of this patent application, the expression "in particular" should always be understood as introducing an optional, preferred feature. The expression should not be understood as "and indeed" or "namely".

[0012] An "open-pore oil storage medium" is understood to mean any porous medium designed to absorb oil, in particular to absorb it and store it at least temporarily.

[0013] Preferably, an open-pore oil storage medium has less than one outer boundary surface impermeable to a fluid.

[0014] A "first region" is understood to mean a spatially limited region of the oil storage and oil filtration device. A first region can also be formed in a layered manner, wherein a layer thickness can be less than or equal to half the width of the layer and / or half the length of the layer, preferably less than or equal to a third of the width of the layer and / or a third of the length of the layer, and particularly preferably less than or equal to a quarter of the width of the layer and / or a quarter of the length of the layer.

[0015] Preferably, the first region of the oil storage and oil filtration device has cavities and / or pores, in particular cavities and / or pores in the interior of the oil storage and oil filtration device. The cavities and / or pores are preferably at least partially connected to one another, so that adjacent cavities and / or pores are fluidically connected. In other words, the first region of the oil storage and oil filtration device can be permeable to fluids, in particular gases and / or liquids.

[0016] Preferably, the first region of the oil storage and oil filtration device is formed at least partially from plastic, preferably entirely from plastic. In particular, the first region of the oil storage and oil filtration device is formed at least partially from a polyurethane, preferably entirely. Again, the first region of the oil storage and oil filtration device is formed at least partially from a polyurethane ester and / or a polyurethane ether, particularly preferably entirely.

[0017] In particular, the first region of the oil storage and oil filtration device can be reticulated.

[0018] A "medium pore size" is the average

[0019] Pore ​​diameter of a pore distribution. In other words, an average pore size is the average pore diameter of a plurality of pores in a spatially coherent volume of the oil storage and oil filtration device. In particular, in a spatially coherent volume of the oil storage and oil filtration device of less than or equal to 1 cm 3 , preferably less than or equal to 2 cm 3 , preferably less than or equal to 4 cm 3 , particularly preferably less than or equal to 6 cm 3 .

[0020] The first region of the oil storage and oil filtration device can have an average pore size of less than or equal to 550 pm, preferably less than or equal to 500 pm, more preferably less than or equal to 450 pm, and particularly preferably less than or equal to 400 pm. Furthermore, the first region of the oil storage and oil filtration device can have an average pore size of less than or equal to 350 pm, preferably less than or equal to 300 gm, preferably less than or equal to 250 gm, and particularly preferably less than or equal to 200 gm.

[0021] As the average pore size of the oil storage and oil filtration device, in particular of the open-pore oil storage medium, decreases, the capillary forces acting on a designated fluid that may be located on the surface of the oil storage and oil filtration device increase. As a result, the designated fluid can be absorbed and / or stored more effectively in the open-pore oil storage medium, in particular at an increased rate.

[0022] The first region of the oil storage and oil filtration device can have an average pore size of greater than or equal to 350 gm, preferably greater than or equal to 400 gm, more preferably greater than or equal to 450 gm and particularly preferably greater than or equal to 500 gm.

[0023] Surface energy is the energy required to break the bonds and overcome the molecular forces of liquids or solids when creating a new surface.

[0024] The first area of ​​the oil storage and oil filtration device can have a surface energy of less than or equal to 55 mJ / m 2 preferably less than or equal to 50 mJ / m 2 , preferably less than or equal to 45 mJ / m 2 and particularly preferably less than or equal to 40 mJ / m 2 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a surface energy of less than or equal to 35 mJ / m 2 , preferably less than or equal to 30 mJ / m 2 , preferably less than or equal to 25 mJ / m 2 and particularly preferably less than or equal to 20 mJ / m 2As the surface energy of a solid decreases, the contact angle of a liquid, particularly an oil, on the surface of a solid increases. This reduces the wettability of a solid by a liquid.

[0025] The first area of ​​the oil storage and oil filtration device can have a surface energy of greater than or equal to 15 mJ / m 2 preferably greater than or equal to 20 mJ / m 2 , preferably greater than or equal to 30 mJ / m 2 and particularly preferably greater than or equal to 35 mJ / m 2 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a surface energy of greater than or equal to 40 mJ / m 2 , preferably greater than or equal to 45 mJ / m 2 , preferably greater than or equal to 50 mJ / m 2 and particularly preferably greater than or equal to 55 mJ / m 2 .

[0026] As the surface energy increases, the wettability of a solid by a liquid increases.

[0027] A "monolithically" formed first region of the oil storage and oil filtration device, in particular of the open-pore oil storage medium, is understood to mean a first region of an open-pore oil storage medium formed from a coherent component. In other words, a monolithically formed open-pore oil storage medium means a tool-falling open-pore oil storage medium.

[0028] This allows the first section of the oil storage and oil filtration device to be manufactured with a reduced number of manufacturing steps.

[0029] The first region of the oil storage and oil filtration device can have a cube shape. The first region of the oil storage and oil filtration device can be designed as a sponge, in particular as a rectangular sponge and / or as a square sponge.

[0030] The first region of the oil storage and oil filtration device can have a height of less than or equal to 100 mm, preferably less than or equal to 70 mm, preferably less than or equal to 50 mm, particularly preferably less than or equal to 30 mm.

[0031] An “oil quantity” can be understood as any desired quantity of oil. In particular, an oil quantity can be understood as any desired quantity of liquid oil and / or oil present as foam and / or as a mixture of liquid oil and oil present as foam. In particular, an oil quantity can also be understood as an oil quantity that is at least partially present as a gas, in particular a mixture of liquid oil and / or oil present as foam and / or oil present as gas.

[0032] An "oil level" is understood to mean the fill level of a designated transmission filled with oil, in particular the fill level of oil within a designated transmission during operation of the designated transmission. The designated oil level can therefore vary depending on the operating condition of the designated transmission.

[0033] A "maximum fill level" is understood to mean the fill level of an open-pore oil storage medium, in particular of the first region of the oil storage and oil filtration device, at which the capillary force acting on a designated oil located in an open-pore oil storage medium is in balance with the gravitational force acting on the designated oil. If the amount of oil absorbed in an open-pore oil storage medium exceeds the maximum fill level, designated oil escapes from the open-pore oil storage medium in the direction of the acting gravitational force and thus in the direction of the second region, in particular the filtration medium. Escaping oil can thus be cleaned by the filtration medium.

[0034] The oil storage and oil filtration device can be arranged within a designated transmission outside a designated oil level, in particular completely outside. In other words, the oil storage and oil filtration device can be arranged within a designated transmission outside a designated oil level in such a way that it is not in contact with the oil level, in particular not in permanent contact. In particular, the oil storage and oil filtration device can be arranged within a designated transmission outside a designated oil level in such a way that it is not in contact with the oil level, in particular not in permanent contact, regardless of a designated operating state, in particular a relative position, of a designated transmission.

[0035] The first region of the oil storage and oil filtration device can be designed to receive and / or discharge oil.

[0036] Particularly when starting a transmission, the movement of the moving component can cause the oil level to fluctuate. In particular, the oil temperature rises, causing the oil density to decrease and the oil level to rise. The rising oil level leads to higher churning losses. The oil storage and filtration device proposed here is designed to store oil and can thus counteract the reduction in oil density by absorbing oil. Ideally, this allows the oil level and thus churning losses to be kept constant and, in particular, to be reduced to a minimum.

[0037] A decreasing surface energy of the open-pore oil storage medium, particularly of the first region of the oil storage and oil filtration device, reduces the wettability of the open-pore oil storage medium by a liquid. Reduced wettability also reduces the capillary effect and thus the maximum rise height of a designated oil quantity in the open-pore oil storage medium, particularly in the first region of the oil storage and oil filtration device. This allows the designated oil to escape from the open-pore oil storage medium at an even faster rate. Thus, a constant oil level can be reached at an even faster rate.

[0038] A "second region" is understood to mean a spatially limited section of the oil storage and oil filtration device. A second region can also be formed in a layered manner, wherein a layer thickness can be less than or equal to half the width of the layer and / or half the length of the layer, preferably less than or equal to a third of the width of the layer and / or a third of the length of the layer, and particularly preferably less than or equal to a quarter of the width of the layer and / or a quarter of the length of the layer.

[0039] Preferably, the second region of the oil storage and oil filtration device is formed at least partially from plastic fibers, preferably completely from plastic fibers.

[0040] The second area can advantageously be arranged below the first area.

[0041] A "filtration medium" is understood to mean any medium designed to retain a solid, in particular a metallic solid, from a fluid volume flow, in particular a liquid fluid volume flow, preferably an oil volume flow. The fluid volume flow can pass through the filtration medium while dirt particles are retained. A filtration medium can also be designed as a filtration layer.

[0042] A filtration medium can be single-layer or multi-layered.

[0043] In particular, the second region can be connected to the first region such that an oil that is received and / or stored and / or defoamed and / or filtered by the first region is additionally filtered through the second region. This allows for improved oil cleaning results and an increased particle absorption capacity of the oil storage and oil filtration device, particularly for metal particles from the oil.

[0044] In particular, when the first region of the oil storage and oil filtration device behaves like a porous buffer reservoir, a designated oil present in the first region of the oil storage and oil filtration device can exert a hydrostatic pressure on a designated oil present in the second region of the oil storage and oil filtration device. This can improve the filtration effect of the second region. Furthermore, the filtration effect of the second region increases with the fill level of the first region due to the increasing hydrostatic pressure acting on the second region.

[0045] The oil storage and oil filtration device is suitably designed to absorb and / or defoam oil.

[0046] The first area of ​​the oil storage and oil filtration device can be designed to defoam an oil.

[0047] A "defoaming rate" is understood to mean the ability of the oil storage and oil filtration device to at least partially, or in particular completely, defoam a quantity of oil per unit area and unit time. The quantity of oil can be measured in cubic meters and / or kg.

[0048] Due to the movement of the moving components of the gearbox and the associated intermittent intervention of the moving component in the oil quantity present in the gearbox, the oil can be converted at least partially into a foamy and / or gaseous state. Oil that is at least partially present as foam can impair the lubricating effect of the oil on the moving components of the gearbox and thus lead to increased abrasive wear of the moving components. Furthermore, the formation of foam and / or gas must be taken into account when specifying the required oil quantity for a gearbox, so that the oil quantity must be increased by the amount of oil present as foam and / or gas in order to achieve a sufficiently high oil level.

[0049] The capillary forces acting on a designated oil that is at least partially in the form of foam, which can act through the pores of the open-pore oil storage medium and the pores of the filtration medium on the designated oil, can exceed the surface tension of a designated oil that is at least partially in the form of foam. This can cause a foam bubble in the designated oil to collapse. Furthermore, the designated oil can be absorbed into the open-pore oil storage medium. This can defoam the designated oil. This can reduce the proportion of foam in the amount of oil in a gearbox. This can improve the lubricating effect of the oil. Furthermore, the required amount of oil can be reduced, which can reduce the weight of the gearbox and increase its efficiency.By decreasing the average pore diameter of an open-pore oil storage medium, in particular of a first region of an open-pore oil storage medium, the capillary force acting on a designated oil can be increased, so that larger surface tensions of foam bubbles can be exceeded and thus collapse. This can increase the defoaming rate of the open-pore oil storage medium, in particular of a first region of the oil storage and oil filtration device. This can reduce the proportion of foam in the oil quantity in a transmission.

[0050] Due to an increasing pore density of the open-pore oil storage medium, particularly of the first region of the oil storage and oil filtration device, capillary forces through the pores can act on more foam bubbles and / or multiple capillary forces from different pores can act on one foam bubble, thus increasing the probability that foam bubbles will collapse. This can further increase the defoaming rate of the open-pore oil storage medium, particularly of a first region of the oil storage and oil filtration device.

[0051] Foamed oil also leads to thermal insulation caused by the oil foam, which reduces heat dissipation through the foamed oil. The oil storage and oil filtration system proposed here can counteract this effect.

[0052] In transmissions with an active hydraulic circuit, the compressible oil foam can contribute to a reduced delivery rate in the oil circuit, particularly if the oil foam enters the hydraulic circuit. This can cause functional and / or noise disruptions, which the oil storage and oil filtration device proposed here can counteract. If the first area of ​​the oil storage and oil filtration device has a height that is greater than the maximum fill level, the part of the first area of ​​the oil storage and oil filtration device behaves like a buffer reservoir, particularly a porous buffer reservoir, from which additional designated oil can flow.In this way, a uniform and uninterrupted discharge of oil as at least partially present liquid, preferably as completely present liquid, from the first region of the oil storage and oil filtration device can be achieved, which usually discharges through the filtration medium and is cleaned there.

[0053] The first region of the oil storage and oil filtration device can also be designed to filter an oil. In other words, the first region of the oil storage and oil filtration device can be designed to retain a solid, in particular a metallic solid, from a fluid volume flow, in particular a liquid fluid volume flow, preferably an oil volume flow. The fluid volume flow can pass through the first region of the oil storage and oil filtration device, while dirt particles above a size defined by the average pore size of the first region are retained by the first region. If a dirt particle in the fluid volume flow is larger than the average pore size of the first region, it is retained by the first region.

[0054] Optionally, the first region of the open-pore oil storage medium has a surface with a wave shape and / or a grooved shape.

[0055] The following definition should be explained: A "surface" is an external surface that delimits a body. In particular, the surface is to be understood as the closed surface that envelops and / or delimits a body.

[0056] The wave-like and / or ribbed shape of the surface of the first area of ​​the oil storage and oil filtration device allows the surface area to be increased while maintaining the same volume. With an increased surface area, the first area of ​​the oil storage and oil filtration device can absorb and / or store and / or defoam and / or filter oil even more quickly.

[0057] Furthermore, the wave-like and / or grooved shape of the surface of the first region of the oil storage and oil filtration device can reduce waste during production. This allows the first region of the oil storage and oil filtration device to be manufactured more cost-effectively.

[0058] In particular, the surface of the first region of the oil storage and oil filtration device can be formed symmetrically, preferably having a symmetrical wave shape and / or grooved shape.

[0059] Optionally, the first region of the oil storage and oil filtration device has an average pore size of greater than or equal to 200 pm, preferably greater than or equal to 300 pm and particularly preferably greater than or equal to 400 pm.

[0060] The first region of the oil storage and oil filtration device can have an average pore size of greater than or equal to 200 pm, preferably greater than or equal to 250 pm, more preferably greater than or equal to 300 pm, and particularly preferably greater than or equal to 350 pm. Furthermore, the first region of the oil storage and oil filtration device can have an average pore size of greater than or equal to 400 pm, preferably greater than or equal to 450 pm, more preferably greater than or equal to 500 pm, and particularly preferably greater than or equal to 550 pm.

[0061] Optionally, the oil storage and oil filtration device has a temperature resistance of greater than or equal to 65 ° C, preferably greater than or equal to 70 ° C and particularly preferably greater than or equal to 80 ° C.

[0062] The oil storage and oil filtration device can have a temperature resistance of greater than or equal to 60 ° C, preferably greater than or equal to 65 ° C, preferably greater than or equal to 70 ° C and particularly preferably greater than or equal to 75 ° C. Furthermore, the oil storage and oil filtration device can have a temperature resistance of greater than or equal to 80 ° C, preferably greater than or equal to 85 ° C, preferably greater than or equal to 90 ° C and particularly preferably greater than or equal to 95 ° C.

[0063] The oil storage and oil filtration device can have a temperature resistance of less than or equal to 120 ° C, preferably less than or equal to 110 ° C, preferably less than or equal to 100 ° C and particularly preferably less than or equal to 95 ° C. Furthermore, the oil storage and oil filtration device can have a temperature resistance of less than or equal to 90 ° C, preferably less than or equal to 85 ° C, preferably less than or equal to 80 ° C and particularly preferably less than or equal to 70 ° C.

[0064] This allows the oil storage and oil filtration device to be used over a particularly wide temperature range, especially in demanding ambient temperature ranges, especially in transmissions. The first zone is advantageously made of a polyurethane ester.

[0065] Optionally, the first area of ​​the oil storage and oil filtration device has a density of less than or equal to 90 kg / m3 to , preferably less than or equal to 40 kg / m 3 and particularly preferably less than or equal to 15 kg / m 3 .

[0066] The following term is explained in this regard:

[0067] The term "density" refers to the bulk density. The bulk density is the density of a porous solid and is calculated from the ratio of the mass of the solid to the sum of the volume of the solid and the volume of the voids. The bulk density can also be referred to as apparent density, geometric density or volumetric weight.

[0068] The first area of ​​the oil storage and oil filtration device can have a density of less than or equal to 200 kg / m 3 preferably less than or equal to 175 kg / m 3 and particularly preferably less than or equal to 150 kg / m 3 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a density of less than or equal to 125 kg / m3 preferably less than or equal to 100 kg / m 3 and particularly preferably less than or equal to 90 kg / m 3 .

[0069] The first area of ​​the oil storage and oil filtration device can have a density of less than or equal to 80 kg / m 3 preferably less than or equal to 70 kg / m 3 , preferably less than or equal to 60 kg / m 3 and particularly preferably less than or equal to 40 kg / m 3 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a density of less than or equal to 30 kg / m 3 preferably less than or equal to 20 kg / m 3 , preferably less than or equal to 10 kg / m 3 and particularly preferably less than or equal to 5 kg / m 3 . The first area of ​​the oil storage and oil filtration device may have a density greater than or equal to 5 kg / m 3 preferably greater than or equal to 10 kg / m3 , preferably greater than or equal to 15 kg / m 3 and particularly preferably greater than or equal to 20 kg / m 3 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a density of greater than or equal to 25 kg / m 3 preferably greater than or equal to 30 kg / m 3 , preferably greater than or equal to 35 kg / m 3 and particularly preferably greater than or equal to 45 kg / m 3 .

[0070] The first area of ​​the oil storage and oil filtration device can have a density greater than or equal to 90 kg / m 3 preferably greater than or equal to 100 kg / m 3 and particularly preferably greater than or equal to 125 kg / m 3 . Furthermore, the first area of ​​the oil storage and oil filtration device can have a density of greater than or equal to 150 kg / m 3 preferably greater than or equal to 175 kg / m 3 and particularly preferably greater than or equal to 200 kg / m3 .

[0071] Preferably, the first region has a pore density of less than or equal to 220 ppi, preferably less than or equal to 160 ppi and particularly preferably less than or equal to 110 ppi.

[0072] The following term is explained in this regard:

[0073] Pore ​​density is the number of pores per unit length. Pore density can also be referred to as linear structural density. The unit ppi stands for the number of pores per inch.

[0074] By increasing the pore density of the open-pore oil storage medium, a larger number of cavities can be achieved. This accelerates the oil absorption and release into the open-pore oil storage medium. This further reduces the amount of oil required in a transmission. This allows the transmission weight to be further reduced and efficiency to be further increased.

[0075] By reducing the average pore diameter of an open-pore oil storage medium, in particular of a first region of an open-pore oil storage medium, the pore density can be increased even further. This allows the volume of the cavities in the open-pore oil storage medium to be increased even further. This means that even more oil can be absorbed and released. This allows a constant oil level to be reached even more quickly. This means that the amount of oil required in a gearbox can be reduced even further. This allows the weight of the gearbox to be reduced even further and efficiency to be increased even further.

[0076] The first region preferably has a pore density of less than or equal to 195 ppi, preferably less than or equal to 135 ppi, furthermore preferably less than or equal to 100 ppi and particularly preferably less than or equal to 90 ppi. Likewise preferably, the first region has a pore density of less than or equal to 80 ppi, preferably less than or equal to 70 ppi, furthermore preferably less than or equal to 60 ppi and particularly preferably less than or equal to 50 ppi.

[0077] Furthermore, the first region preferably has a pore density of greater than or equal to 10 ppi, preferably of greater than or equal to 40 ppi and particularly preferably of greater than or equal to 80 ppi.

[0078] The first region preferably has a pore density of greater than or equal to 25 ppi, preferably greater than or equal to 50 ppi, furthermore preferably greater than or equal to 60 ppi and particularly preferably greater than or equal to 70 ppi. Likewise preferably, the first region has a pore density of greater than or equal to 90 ppi, preferably greater than or equal to 100 ppi, furthermore preferably greater than or equal to 110 ppi and particularly preferably greater than or equal to 135 ppi.

[0079] The second region expediently comprises glass fibers and / or polyester fibers and / or polyamide fibers and / or cellulose fibers.

[0080] The second region can be configured as a nonwoven using fibers. The second region can consist of glass fibers or polyester fibers and / or polyamide fibers and / or cellulose fibers.

[0081] Preferably, the second area has a ßioo _value greater than or equal to 2, preferably a ßgo _ Value greater than or equal to 2 and particularly preferably a ß2o _ Value greater than or equal to 2 .

[0082] The following term is explained in this regard:

[0083] A "ß-value" is a measure of the effectiveness of the filtration medium, in particular a measure according to ISO 16889 . A "ß2oo _ Value" is understood as a ß-value at a particle size of the test dust of 200 pm. The effectiveness of the filter is determined by measuring the upstream and downstream particle size distributions by counting the particles. The "ß-value" corresponds to the ratio of the particle number determined upstream of the filtration medium to the particle number determined downstream, in particular the separation rate of the filtration medium. If the ß2oo _Value equal to 2 , this means that the filtration medium absorbs and stores every second particle with a particle size of 200 pm. A ß2oo _ A value of 10 means that the filtration medium absorbs and stores nine out of ten particles with a particle size of 200 pm. According to a suitable embodiment, the filtration medium has a particle absorption capacity (absorption capacity) per 100cm 2 Area of ​​the filtration medium for the particle size proposed here of greater than or equal to 0.2 g, in particular a particle holding capacity according to ISO 16889, preferably a particle holding capacity of greater than or equal to 1 g and particularly preferably a particle holding capacity of greater than or equal to 1.5 g.

[0084] Optionally, the second area has a ßioo _ Value greater than or equal to 200 on , preferably a ßgo _ Value greater than or equal to 200 and particularly preferably a ß2o_ Value greater than or equal to 200 .

[0085] Optionally, the fibers are needled and / or bonded together and / or hydroentangled and / or wet-laid.

[0086] According to a particularly expedient embodiment, the oil storage and oil filtration device has a third region, wherein the third region has a filtration medium comprising oil-resistant fibers for filtering oil, and wherein the third region is connected to the first region, preferably directly connected to the first region, in particular a third region whose filtration medium has the material properties of the filtration medium of the second region.

[0087] The following term is explained in this regard:

[0088] A "third region" is a spatially limited region of the oil storage and oil filtration device. A third region can also be formed in a layered manner, wherein a layer thickness can be less than or equal to half the width of the layer and / or half the length of the layer, preferably less than or equal to a third of the width of the layer and / or a third of the length of the layer, and particularly preferably less than or equal to a quarter of the width of the layer and / or a quarter of the length of the layer.

[0089] The third area of ​​the oil storage and oil filtration device can be directly connected to the first area of ​​the oil storage and oil filtration device.

[0090] In particular, the third region can be connected to the first region in such a way that a designated oil which is filtered through the third region can additionally be taken up and / or stored and / or defoamed and / or filtered by the first region.

[0091] Preferably, the third region can be arranged above the first region, wherein the first region can be arranged above the second region, such that in the direction of the acting gravity, a designated oil can first pass through the third region, then the first region and then the second region in the direction of the acting gravity.

[0092] Particularly preferably, the third region can be arranged above the first region and / or the first region above the second region in such a way that, in the direction of the acting force of gravity, a designated oil can first be taken up and / or stored and / or defoamed and / or filtered in the third region, then enter the first region from the third region and can be taken up and / or stored and / or defoamed and / or filtered in the first region and can then be filtered by the second region.

[0093] According to an expedient embodiment, the oil storage and oil filtration device has a fourth region, wherein the fourth region is designed as an oil-resistant, open-pore oil storage medium for absorbing oil and wherein the fourth region is connected to the third region, preferably directly connected to the third region, in particular a fourth region whose open-pore oil storage medium has the material properties of the open-pore oil storage medium of the first region.

[0094] The following term is explained in this regard:

[0095] A "fourth region" is a spatially limited region of the oil storage and oil filtration device. A fourth region can also be formed in a layered manner, wherein a layer thickness can be less than or equal to half the width of the layer and / or half the length of the layer, preferably less than or equal to a third of the width of the layer and / or a third of the length of the layer, and particularly preferably less than or equal to a quarter of the width of the layer and / or a quarter of the length of the layer.

[0096] Preferably, the fourth region of the open-pore oil storage medium can be directly connected to the third region, preferably by a connecting means.

[0097] The fourth region can be connected to the third region, in particular directly, in such a way that the fourth region of the third region can be arranged.

[0098] In particular, the fourth region can be connected to the third region in such a way that a designated oil which is taken up and / or stored and / or defoamed and / or filtered by the fourth region can additionally be filtered through the third region. This makes it possible to achieve even better cleaning of a designated oil. By means of an oil storage and oil filtration device constructed in this way and having a first region, a second region, a third region and a fourth region, a two-stage, three-stage or four-stage filtration of a designated oil can be achieved. This makes it possible to achieve even better cleaning results for a designated oil, in particular for metal particles from the designated oil.

[0099] In addition, an oil storage and oil filtration device constructed in this way can achieve a combination of defoaming and single-stage or multi-stage filtration.

[0100] According to a further expedient embodiment, the oil storage and oil filtration device has a fifth region, wherein the fifth region has a filtration medium comprising oil-resistant fibers for filtering oil and wherein the fifth region is connected to the fourth region, preferably directly connected to the fourth region, in particular a fifth region whose filtration medium has the material properties of the filtration medium of the second region.

[0101] The following term is explained in this regard:

[0102] A "fifth area" is understood to mean a spatially limited area of ​​the oil storage and oil filtration device. The fifth area can have all the properties that a second area and / or a third area can have, without having to have all the properties of the second area and / or the third area.

[0103] The fifth area allows the advantages already described for the third area to be further developed. The fifth area of ​​the oil storage and oil filtration device can be directly connected to the fourth area of ​​the oil storage and oil filtration device.

[0104] The regions are expediently connected to one another at least in pairs by pinning and / or by clamping and / or by crimping and / or by welding and / or by gluing and / or by laminating, in particular the first region with the second region and / or the first region with the third region and / or the third region with the fourth region and / or the fourth region with the fifth region.

[0105] Preferably, the third region and / or the fifth region has at least one through opening.

[0106] The following term is explained in this regard:

[0107] A "through-opening" is understood to mean an opening in a region which extends along a height extension and / or the direction of the designated gravity of an oil storage and oil filtration device from one end of the region to the other end of the region. In other words, a foreign body with a corresponding diameter smaller than a diameter of the through-opening and / or oil can be guided through a through-opening of the region.

[0108] In particular, the third region may have at least one through opening.

[0109] In particular, the fifth region may have at least one through opening.

[0110] The third region and / or the fifth region of the oil storage and oil filtration device can have 10 or more through-openings, in particular 20 or more, preferably 40 or more, preferably 60 or more, particularly preferably 80 or more.

[0111] A through opening can also be called a perforation.

[0112] A through opening may have at least partially an elliptical or approximately circular internal cross-section.

[0113] Through the through openings in an oil storage and oil filtration device constructed in this way, having at least a first region, a second region and a third region, the oil absorption capacity and / or the oil filtration capacity can be increased and / or a higher particle absorption capacity can be achieved and / or an improved drainage of a designated oil can be achieved.

[0114] The at least one through-opening can also influence the relationship between defoaming speed and filtration speed, in particular by the acting hydrostatic pressure from the fill level of a designated oil of the first region and / or by the acting hydrostatic pressure from the fill level of a designated oil of the first region in combination with the through-openings.

[0115] Furthermore, the through-openings can improve the use of the open-pore oil storage medium over a wide viscosity range of a designated oil, since, particularly in the case of high viscosities, as may be the case at low temperatures, for example, a designated oil cannot pass through the oil storage and oil filtration device at the same speed.

[0116] The oil storage and oil filtration device can be arranged within a designated transmission above a designated oil level, preferably completely above a designated oil level.

[0117] Preferably, the first region and / or the second region and / or the third region and / or the fourth region and / or the fifth region of the oil storage and oil filtration device can be formed entirely from a polyurethane.

[0118] In particular, the first region and / or the second region and / or the third region and / or the fourth region and / or the fifth region of the oil storage and oil filtration device can at least partially comprise a polyurethane ether and / or a polyurethane ester, preferably be formed entirely from a polyurethane ether and / or polyurethane ester.

[0119] According to a second aspect of the invention, the object is achieved by a transmission, in particular a transmission of an at least partially electrically driven motor vehicle, comprising an oil storage and oil filtration device according to the first aspect of the invention.

[0120] It is understood that the advantages of an oil storage and oil filtration device according to the first aspect of the invention as described above extend directly to a transmission having an oil storage and oil filtration device according to the first aspect of the invention.

[0121] It should be expressly noted that the subject matter of the second aspect can be advantageously combined with the subject matter of the preceding aspect of the invention, either individually or cumulatively in any combination. In particular, the object is achieved by a transmission for a fully electrically powered motor vehicle comprising an oil storage and oil filtration device according to the first aspect of the invention.

[0122] According to a third aspect of the invention, the object is achieved by using an oil storage and oil filtration device according to the first aspect of the invention for storing oil and / or for defoaming oil and / or for filtering oil.

[0123] It is understood that the advantages of an oil storage and oil filtration device according to the first aspect of the invention as described above extend directly to a use of an oil storage and oil filtration device according to the first aspect of the invention for storing oil and / or for defoaming oil and / or for filtering oil.

[0124] It should be expressly pointed out that the subject matter of the third aspect can be advantageously combined with the subject matters of the preceding aspects of the invention, both individually or cumulatively in any combination.

[0125] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0126] Figure 1: a first embodiment of an oil storage and oil filtration device in a perspective view; and

[0127] Figure 2: A perspective view of a second embodiment of an oil storage and oil filtration device. In the following description, the same reference symbols denote the same components or the same features, so that a description given with reference to one figure regarding a component also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0128] According to a first embodiment of an oil storage and oil filtration device, the oil storage and oil filtration device has a first region 10, which is monolithically formed as an oil-resistant oil storage medium for absorbing oil. The oil storage and oil filtration device has a second region 20, which has an oil-resistant fiber-containing filtration medium for filtering oil. The second region 20 is connected to the first region 10, preferably directly connected to the first region 10.

[0129] The second region 20 can be connected to the first region 10 in such a way that, in the direction of the acting force of gravity, a designated oil can first pass through the first region 10 and then through the second region 20. In other words, the second region 20 can be connected to the first region 10 in such a way that, in a designated installation position of the oil storage and oil filtration device in a designated transmission, the second region 20 is arranged below the first region 10.

[0130] The oil storage and oil filtration device can be arranged within a designated transmission in a designated installation position above a designated oil level 60, preferably completely above a designated oil level 60. According to a second embodiment of an oil storage and oil filtration device, the oil storage and oil filtration device has a third region 30, which has a filtration medium comprising oil-resistant fibers for filtering oil. The third region 30 is connected to the first region 10, preferably directly connected to the first region 10. The filtration medium of the third region 30 can have the material properties of the filtration medium of the second region 20.

[0131] The third region 30 can be connected to the first region 10 in such a way that, in the direction of the acting force of gravity, a designated oil can first pass through the third region 30, then through the first region 10, and then through the second region 20. In other words, the third region 30 can be connected to the first region 10 in such a way that, in a designated installation position of the oil storage and oil filtration device in a designated transmission, the third region 30 is arranged above the first region 10.

[0132] The third region 30 can have at least one through-opening 31, preferably a plurality of through-openings 31, preferably a number of 10 or more through-openings 31, particularly preferably a number of 30 or more through-openings 31.

[0133] The oil storage and oil filtration unit can have a fourth region 40, wherein the fourth region 40 is designed monolithically as an oil-resistant, open-pore oil storage medium for absorbing oil and wherein the fourth region 40 is connected to the third region 30, preferably directly connected to the third region 30. The open-pore oil storage medium of the fourth region 40 can have the material properties of the open-pore oil storage medium of the first region 10. The fourth region 40 can be connected to the third region 30 in such a way that, in the direction of the acting force of gravity, a designated oil can first pass through the fourth region 40 and then through the third region 30.In other words, the fourth region 40 can be connected to the third region 30 in such a way that the fourth region 40 is arranged above the third region 30 in a designated installation position of the oil storage and oil filtration device in a designated transmission.

[0134] The oil storage and oil filtration device can have a fifth region 50, wherein the fifth region 50 has a filtration medium comprising oil-resistant fibers for filtering oil, and wherein the fifth region 50 is connected to the fourth region 40, preferably directly connected to the fourth region 40. The filtration medium of the fifth region 50 can have the material properties of the filtration medium of the second region 20.

[0135] The fifth region 50 can be connected to the fourth region 40 such that, in the direction of the acting gravity, a designated oil can first pass through the fifth region 50 and then through the fourth region 40. In other words, the fifth region 50 can be connected to the fourth region 40 such that, in a designated installation position of the oil storage and oil filtration device in a designated transmission, the fifth region 50 is arranged above the fourth region 40.

[0136] The fifth region 50 can have at least one through-opening 51, preferably a plurality of through-openings 51, preferably a number of 10 or more through-openings 51, particularly preferably a number of 30 or more through-openings 51. The oil storage and oil filtration device can have any number of further regions above the fifth region 50, wherein a fifth region 50 is followed by a region which is designed like the first region 10, and this can be followed by a region which is designed like the second region 20. This pattern of alternating regions can be continued as desired. In other words, the oil storage and oil filtration device can have any number of fourth regions 40 and fifth regions 50, which can be arranged alternately in a designated installation position within a designated transmission above the fifth region 50.This allows the oil storage and oil filtration effect to be improved, especially adapted to the specific requirements of a designated transmission.

[0137] List of reference symbols

[0138] 10 first area

[0139] 20 second area 30 third area

[0140] 31 Passage opening of the third area

[0141] 40 fourth area

[0142] 50 fifth area

[0143] 51 Passage opening of the fifth area 60 Oil level

Claims

Patent claims 1. Oil storage and oil filtration device comprising: a first area (10) , wherein the first area (10) is monolithically formed as an oil-resistant open-pore oil storage medium for receiving oil; and a second area (20) , wherein the second area (20) comprises an oil-resistant fiber filtration medium for filtering oil and wherein the second area (20) is connected to the first area (10), preferably directly connected to the first area (10).

2. Oil storage and oil filtration device according to claim 1, characterized in that the first area (10) is formed from a polyurethane ester.

3. Oil storage and oil filtration device according to one of claims 1 or 2, characterized in that the first area (10) has a density of less than or equal to 90 kg / m³ 3 has, preferably less than or equal to 40 kg / m² 3and especially preferably of less than or equal to 15 kg / m² 3 .

4. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the first area (10) has a pore density of less than or equal to 220 ppi, preferably less than or equal to 160 ppi and particularly preferably less than or equal to 110 ppi.

5. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the first area (10) has a pore density of greater than or equal to 10 ppi, preferably greater than or equal to 40 ppi and particularly preferably greater than or equal to 80 ppi.

6. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the second area (20) comprises glass fibers and / or polyester fibers and / or polyamide fibers and / or cellulose fibers.

7. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the second area (20) has a βioo _ has a value greater than or equal to 2, preferably a ßgo _ value greater than or equal to 2 and particularly preferably a β2o _ Value greater than or equal to 2.

8. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the second area (20) has a βioo _ has a value greater than or equal to 200, preferably a ßgo _ A value greater than or equal to 200 and particularly preferably a β2o _ Value greater than or equal to 200.

9. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the fibers are needled and / or are materially bonded together and / or are water jet solidified and / or are wet laid.

10. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the oil storage and oil filtration device has a third area (30), wherein the third area (30) has a filtration medium comprising oil-resistant fibers for the filtration of oil, and wherein the third area (30) is connected to the first area (10), preferably directly connected to the first area (10), in particular a third area (30) whose filtration medium has the material properties of the filtration medium of the second area (20).

11. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the oil storage and oil filtration device has a fourth area (40), wherein the fourth area (40) is monolithically formed as an oil-resistant open-pore oil storage medium for receiving oil, and wherein the fourth area (40) is connected to the third area (30), preferably directly connected to the third area (30), in particular a fourth area (40) whose open-pore oil storage medium has the material properties of the open-pore oil storage medium of the first area (10).

12. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the oil storage and oil filtration device has a fifth area (50), wherein the fifth area (50) has a filtration medium comprising oil-resistant fibers for the filtration of oil, and wherein the fifth area (50) is connected to the fourth area (40), preferably directly connected to the fourth area (40), in particular a fifth area (50) whose filtration medium has the material properties of the filtration medium of the second area (20).

13. Oil storage and oil filtration device according to one of the preceding claims, characterized in that the areas (10, 20, 30, 40, 50) are connected to each other at least in pairs by pinning and / or clamping and / or crimping and / or welding and / or gluing and / or laminating, in particular the first area (10) with the second area (20) and / or the first area (10) with the third area (30) and / or the third area (30) with the fourth area (40) and / or the fourth area (40) with the fifth area (50).

14. Oil storage and oil filtration device according to one of claims 10 to 13, characterized in that the third area (30) and / or the fifth area (50) has at least one through-opening (31, 51).

15. Transmission, in particular transmission of a motor vehicle that is at least partially electrically powered, comprising an oil storage and oil filtration device according to one of the preceding claims.

16. Use of an oil storage and oil filtration device according to any one of claims 1 to 14 for storing oil and / or for defoaming oil and / or for filtering oil.

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