Lubricant delivery device for supplying lubricant to transmission

Abstract

The invention relates to a lubricant delivery device (10) for supplying a transmission with lubricant, comprising an outer transmission part (18), an inner transmission part (14) which can be rotated relative to the outer transmission part (18), and a sliding bearing (16) for supporting the outer transmission part (18) on the inner transmission part (14), at least one lubricant pocket (20) is formed between the outer transmission part (18) or the inner transmission part (14) on the one hand and the sliding bearing (16) on the other hand, in which lubricant channels (22) are provided, which are guided through the outer transmission part (18), the sliding bearing (16) and the inner transmission part (14) and are designed to provide a supply to the transmission part to be lubricated, the transmission part to be lubricated is located at the downstream end of the lubricant channel (22), which extends through the lubricant pocket (20), and a leakage groove (30) is formed between the outer transmission part (18) or the inner transmission part (14) on the one hand and the plain bearing (16) on the other hand, which leakage groove (30) fluidly connects the lubricant channel (22) to the lubricant pocket (20). By means of the leakage groove (30) leading to the lubricant bag (20), lubricant can be supplied to the transmission device in an inexpensive and reliable manner.

Description

Technical Field

[0001] The invention relates to a lubricant delivery device, by means of which lubricant can be supplied to a transmission via two transmission components mounted against each other so as to be rotatable relative to each other. Background Art

[0002] EP 3 798 470 A1 discloses a lubricant delivery device for supplying lubricant to a transmission device, wherein a supply channel branches radially outward from an annular gap of a double-walled tube, the supply channel reaching a discharge channel leading to a lubrication point via a bronze bushing inserted on the double-walled tube, wherein the bushing is arranged between a rolling bearing / sliding bearing combination supporting the double-walled tube.

[0003] US 2017 / 0356493 A1 discloses a fixed connection of a sliding bearing for supporting a planetary gear with a fixed planetary pin fastened in a planetary carrier of a planetary transmission, wherein the planetary gear pin is in the form of a hollow shaft with a radially extending supply channel. The supply channel extends radially through the sliding bearing and terminates in a lubricant pocket formed in the sliding bearing. In addition, a groove is formed axially between the sliding bearing and the planetary pin so that a portion of the lubricating oil supplied via the planetary pin can be supplied to the axial sliding bearing.

[0004] DE 195 48 756 A1 discloses a lubricating oil delivery device, in which a sliding bearing is fastened in a fixed bearing support to prevent movement, so as to form a radial sliding bearing for a rotating shaft. An oil supply line and an oil pocket axially extending from the oil supply line are formed in the bearing support, so as to apply lubricating oil to holes of the sliding bearing axially spaced apart from each other from the rear side of the sliding bearing. The rotating shaft has an annular groove radially opposite to the oil supply line and the relevant holes in the sliding bearing, so as to be able to receive the lubricating oil supplied from the oil supply line. The bearing gap of the radial sliding bearing can be lubricated with lubricating oil from different radial directions via the annular groove and the hole, wherein the hole is axially spaced apart from the annular groove for conveying lubricant and the lubricating oil is supplied via the oil pocket.

[0005] There is a constant need to provide a lubricant supply to the transmission components to be lubricated of a transmission in the most cost-effective and reliable manner possible. Summary of the invention

[0006] The object of the present invention is to provide a measure by which lubricant can be supplied to a transmission in a cost-effective and reliable manner.

[0007] This object is achieved by a lubricant conveying device having the features of claim 1, a vertical transmission having the features of claim 12, an industrial application having the features of claim 14 and a data aggregate having the features of claim 15. Preferred developments are given in the dependent claims and in the following description, each of which can represent an aspect of the invention alone or in combination. When a feature is presented in conjunction with another feature, this serves only to simplify the presentation of the invention and does not in any way mean that the feature cannot be a development of the invention even without the other feature.

[0008] One aspect of the present invention relates to a lubricant delivery device for supplying lubricant to a transmission device, the device having an outer transmission component, an inner transmission component rotatable relative to the outer transmission component, and a sliding bearing for supporting the outer transmission component on the inner transmission component, wherein at least one lubricant pocket is formed between the outer transmission component or the inner transmission component and the sliding bearing, wherein a lubricant channel passing through the outer transmission component, the sliding bearing and the inner transmission component is designed to supply a transmission component to be lubricated which is arranged at the downstream end of the lubricant channel, wherein the lubricant channel extends through the lubricant pocket, and wherein a leakage groove is formed between the outer transmission component or the inner transmission component and the sliding bearing to fluidically connect the lubricant channel with the lubricant pocket.

[0009] The outer transmission component is constructed to be located radially outside the inner transmission component in a radial direction relative to the rotation axis of the outer transmission component and / or the inner transmission component, at least in the axial area occupied by the sliding bearing. During the expected operation, relative rotation can occur between the outer transmission component and the inner transmission component with the assistance of the sliding bearing. The outer transmission component and the inner transmission component can be coaxially arranged relative to the rotation axis. Here, both the outer transmission component and the inner transmission component can be rotatable, and the corresponding rotation axes basically coincide with each other. Alternatively, only the outer transmission component or only the inner transmission component is rotatable, and the corresponding other transmission component is designed to be fixed, that is, immovable and / or non-rotatable. The fixed transmission component is, for example, a part of a transmission housing and / or a hub connected to the transmission housing to fix it to prevent movement. The transmission housing can be lowered onto the underlying surface to fix it to prevent movement, and the transmission housing is particularly fastened to the underlying surface.

[0010] The sliding bearing, which is preferably in the form of a radial sliding bearing, can be connected to an outer transmission part or an inner transmission part in a co-rotatable manner, for example by pressing in. In this case, a lubricant pocket can be arranged in a sliding bearing pairing, which is formed between the sliding bearing and the transmission part rotatable relative to the sliding bearing. The lubricant pocket can be formed only by the sliding bearing, or only by the transmission part rotatable relative to the sliding bearing, or in one part by the sliding bearing and in another part by the transmission part rotatable relative to the sliding bearing. The lubricant pocket can extend in a partial circumferential direction or in the entire circumferential direction, i.e. in the form of an annular groove closed in the circumferential direction. For example, two or more lubricant pockets are arranged to be spaced apart from each other in the circumferential direction and / or arranged one behind the other in the axial direction. Lubricant, in particular lubricating oil, can accumulate in the region of the lubricant pocket so that a friction-reducing bearing gap filled with lubricant is formed over the extension of the sliding bearing in the axial and circumferential directions, in which a hydrodynamic lubrication is formed, in particular during the expected operation. The sliding bearing can be in the form of a hydrodynamic sliding bearing.

[0011] The lubricant pocket is in particular in the form of a recess in the material of a sliding bearing or an outer transmission component or an inner transmission component. When viewed in the axial direction, the lubricant pocket can have a curved, preferably elliptical and / or sickle-shaped profile in the circumferential direction. When the lubricant pocket is designed to form a clearance fit with the relatively rotating transmission component axially adjacent to the lubricant pocket in the bearing gap of the sliding bearing, the lubricant pocket forms a relatively large free space. The lubricant pocket is opened in a radial direction toward the lubrication point, in particular toward the bearing gap and / or the leakage groove, and is mostly or completely closed in the opposite radial direction. Therefore, the lubricant flow away on the rear side away from the bearing gap can be avoided or at least minimized. If necessary, a channel can be led into the lubricant pocket on the side of the lubricant pocket away from the lubrication point, and the flow cross section of the channel in the radial direction is significantly smaller than the extension range of the lubricant pocket in the axial and circumferential directions. The lubricant pocket can preferably be supplied with lubricant mainly or even only via the clearance fit of the bearing gap and the leakage groove. In particular, the lubricant pocket is basically supplied with lubricant by a leakage effect deliberately allowed or deliberately caused between the side surfaces rotating relative to each other. This allows the viscous friction between the side surfaces rotating relative to each other to be used to intentionally convey lubricant into the lubricant pocket, wherein the leakage groove can allow a significantly higher mass flow from the lubricant channel via the bearing gap and the leakage groove to the lubricant pocket. The lubricant pocket can be produced in particular only by extensively acting machining methods (e.g. milling) so that the lubricant pocket can have a curved, preferably elliptical and / or sickle-shaped contour in the circumferential direction when viewed in the axial direction. Preferably, the lubricant pocket has an arcuate, in particular elliptical contour when viewed in the tangential direction, and a curved, preferably elliptical and / or sickle-shaped cross section when viewed in the axial direction.

[0012] The outer transmission part, the sliding bearing and the inner transmission part through which the lubricant channel passes together form a rotary joint for the lubricant of the lubricant channel at the same time. However, a separate sealing of the lubricant channel in the bearing gap area of ​​the sliding bearing pair can be omitted, so that the manufacturing costs, the assembly work and the number of parts can be reduced. On the contrary, it is even possible to deliberately allow lubricant to leak from the lubricant channel into the bearing gap. With the help of the leakage groove, a certain mass of lubricant flow can be deliberately branched from the lubricant channel to at least one lubricant pocket as a leakage flow. This can improve the lubrication of the sliding bearing and can reduce or even completely eliminate the separate supply of lubricant to the bearing gap and the lubricant pocket. In particular, the leakage groove is axially directed away from the lubricant channel extending essentially radially in the bearing gap area at a right angle, so that the lubricant channel has a preferred flow direction along the lubricant channel. Usually, the pressure in the lubricant channel is so high and the flow rate is so low that an easily controllable static pressure can act on the leakage groove. The flow cross section of the leakage groove can be selected according to the pressure expected during the expected operation in the lubricant channel and the flow rate expected during the expected operation, so that in the case of lubricant loss in the bearing gap, lubricant can be automatically replenished from the lubricant channel, but the lubricant from the lubricant channel does not unnecessarily discharge a large amount of lubricant from the bearing gap and push it out of the axial end of the sliding bearing. Therefore, the leakage from the lubricant channel to the bearing gap is very small, so that the lubrication of the intended transmission component arranged downstream of the bearing gap and lubricated by the lubricant channel is not impaired. At the same time, the lubricant flowing out of the lubricant channel via the leakage groove is not wasted, but is used to assist and improve the sliding bearing characteristics of the bearing device provided by the sliding bearing. Particularly preferably, the lubricant bag is supplied with lubricant only by means of the leakage groove, so that the lubricant supply for the lubricant bag separated from the lubricant channel can be omitted. Due to the use of the sliding bearing device of the transmission component as a rotary joint for the lubricant channel, a separate seal can be omitted, and a slight leakage of the auxiliary sliding bearing device can be allowed by the leakage groove leading to the lubricant bag, thereby realizing a low-cost and reliable lubricant supply to the transmission device.

[0013] The leakage groove can be formed only by the plain bearing, or only by the transmission component rotatable relative to the plain bearing, or partly by the plain bearing and partly by the transmission component rotatable relative to the plain bearing. S Compared with the leakage groove flow cross section A L It can be, for example, 0.01 ≤ AL / As ≤ 0.50, especially 0.02 ≤ AL / As ≤ 0.25, preferably 0.05 ≤ AL / As ≤0.10. On the radially inner and / or radially outer surface facing the plain bearing pair, the lubricant channel can have an annular groove which is closed in the circumferential direction and whose flow cross section As is not taken into account when determining the flow cross section As of the lubricant channel. In addition to the annular groove that may be provided, the lubricant channel in the outer transmission part, the plain bearing and the inner transmission part can be formed by at least one bore, wherein the various bores can intersect to form the lubricant channel and / or can be closed at the open end, for example by a plug and / or a sealing element.

[0014] The leakage groove can extend in the axial direction within a limited circumferential angle range. The leakage groove can significantly increase the bearing clearance between the sliding bearing and the transmission component rotating relative to the sliding bearing within a very limited circumferential angle range. Therefore, the leakage groove can be opened toward the relatively rotating component. When viewed in the axial direction, the leakage groove can, for example, have a substantially rectangular U-shaped cross-section, which can be produced by means of a finger milling cutter. Particularly preferably, the lubricant pocket is formed in the sliding bearing, and the leakage groove is formed in an inner transmission component or an outer transmission component rotatable relative to the sliding bearing. In particular, an annular groove for transmitting lubricant between the lubricant channel of the sliding bearing and the lubricant channel of the relatively rotating transmission component is also formed in the sliding bearing. As a result, the annular groove of the sliding bearing and the lubricant pocket of the sliding bearing can lubricate the bearing clearance with lubricant from the same radial direction, and the leakage groove is used for volume compensation between the lubricant channel or the annular groove and the lubricant pocket.

[0015] The lubricant channel does not end in the bearing gap of the sliding bearing. Instead, the lubricant channel has a supply channel from a lubricant source and ends in the bearing gap of the sliding bearing and a discharge channel leading to the transmission component to be lubricated at the end and starting from the bearing gap of the sliding bearing. If the supply channel is arranged in the outer transmission component, the discharge channel is arranged in the inner transmission component. If the supply channel is arranged in the inner transmission component, the discharge channel is arranged in the outer transmission component. The transmission component to be lubricated can be, for example, another bearing device, such as the axial sliding bearing of the grinding disc of a vertical mill. Such a vertical mill is described, for example, in DE 10 2007 057 608 A1, the content of which is cited as a part of the present invention.

[0016] A fluid connection is understood to be a connection of parts of channels and / or lines which allows a fluid to flow between the parts connected to one another and provides for an exchange of pressure and mass in the pipes communicating with one another.

[0017] During the intended operation, the lubricant channel can be filled with a lubricant. In particular, the lubricant used can be a natural and / or synthetic lubricating oil. The lubricant can preferably contain friction reducing and / or heat dissipating additives. The lubricant is temperature resistant, in particular up to a temperature of 120° C., in particular up to which the additives contained in the lubricant are substantially not denatured.

[0018] In particular, the leakage gap height H of the leakage groove in the radial direction is greater than the bearing gap height h between the outer transmission component or the inner transmission component and the sliding bearing, wherein in particular 1.01 ≤ H / h ≤ 2.00, preferably 1.10 ≤ H / h ≤ 1.75, particularly preferably 1.25 ≤ H / h ≤ 1.50. Due to the selected leakage gap height, an unnecessarily high flow resistance in the leakage groove can be avoided, so that the lubricant pocket can be easily supplied with lubricant from the lubricant channel. The leakage groove can be designed, for example, as a pipe connected to the bearing gap over the axial extension of the leakage groove.

[0019] Preferably, a connecting channel leading to the lubricant bag is provided, wherein the connecting channel is fluidically connected to a lubricant source for feeding lubricant into the lubricant bag and / or to a lubricant drain for discharging lubricant from the lubricant channel. The lubricant bag can be fluidically connected to the lubricant source and / or the lubricant drain via a connecting channel that is implemented as being completely or at least partially separate from the lubricant channel. If the connecting channel is connected to the lubricant channel, the lubricant can be conveyed out of the lubricant channel via the leakage groove and the lubricant bag and from the lubricant bag via the connecting channel, in particular upstream of the sliding bearing, back to the lubricant channel. If the connecting channel is formed separately from the lubricant channel, i.e. not connected to the lubricant channel, the lubrication of the sliding bearing can be influenced without regard to the flow conditions in the lubricant channel. In particular when starting the transmission, lubricant can be supplied at a relatively high pressure via the connecting channel in order to form a hydrostatic sliding bearing and, in particular in normal operation, to reduce the drag torque until a hydrodynamic sliding bearing is formed.

[0020] Particularly preferably, the plain bearing has a radially projecting collar for axially abutting against the outer transmission part or the inner transmission part. The collar of the plain bearing can predetermine the axial insertion depth of the plain bearing relative to the outer transmission part and / or the inner transmission part. This makes it easier to avoid axial displacement of the lubricant channel in the bearing gap. As a result, the flow resistance of the lubricant channel formed in the rotary joint at the plain bearing can be minimized. In addition, the collar can easily be used to mechanically fasten the plain bearing to the outer transmission part or the inner transmission part, for example by using the collar as a fastening flange.

[0021] In one embodiment, a collar is particularly provided to cover a closure and / or sealing element axially facing an opening in a portion of a lubricant channel, in particular to seal with a pressing force. In an outer transmission component or an inner transmission component, an axially extending portion of the lubricant channel can be introduced through a hole, in particular a blind hole, but the portion is expected to be closed at its opening to prevent the escape and leakage of the lubricant. For this purpose, a closure, in particular a plug or other sealing element, can be provided. The collar covering the opening of the sliding bearing can already provide sealing in the form of a labyrinth seal, wherein the collar can further improve the sealing effect by means of a closure or sealing element pressed by the collar.

[0022] In another embodiment, a collar is preferably provided to cover the axially facing opening in a portion of the lubricant channel and to form a further portion of the lubricant channel communicating with this portion. This enables a portion of the lubricant channel and / or the connecting channel to be guided via the collar of the plain bearing. This provides further design freedom when designing the lubricant supply in the transmission. Furthermore, material weakening in the outer transmission component and / or the inner transmission component which might otherwise occur by providing a portion of the lubricant channel and / or the connecting channel can be avoided or reduced.

[0023] Particularly preferably, a collar is provided to cover an axially facing opening of a connecting channel which is in communication with the lubricant bag and formed separately from the lubricant channel, and to form another connecting channel in communication with the connecting channel. The connecting channel can be guided via the collar of the sliding bearing so that the connecting channel can easily extend apart from the lubricant channel. Thus, mutual interference and / or unnecessary material weakening in the outer transmission component and / or the inner transmission component can be avoided.

[0024] In one embodiment, in particular, at least two lubricant pockets are formed one after another in the axial direction at least partially within a common circumferential angle range, wherein the lubricant channel is guided in the axial direction between the two lubricant pockets, and the lubricant channel is fluidically connected to the lubricant pockets via respective leakage grooves that are led away from the lubricant channel in different axial directions. The load-bearing capacity and / or lubrication of the sliding bearing can be appropriately predetermined by the plurality of lubricant pockets. Since the lubricant channel extends in the axial direction between the two lubricant pockets, a symmetrical proportion can be provided for the profile of the leakage groove in both axial directions, thereby ensuring a uniform supply of lubricant to the lubricant pockets. In particular, rows of lubricant pockets that are arranged one after another in the axial direction and are offset in the circumferential direction can be provided, wherein a leakage groove can be provided for each row of lubricant pockets within a corresponding circumferential angle range.

[0025] In a further embodiment, preferably, the leakage groove, in particular only exactly one leakage groove, leaves the lubricant channel only in one axial direction, wherein the lubricant pocket, in particular only exactly one lubricant pocket, is formed in particular only in exactly one axial region. The manufacturing effort and therefore the manufacturing costs can be kept low.

[0026] Particularly preferably, the leakage groove extends predominantly in the vertical direction, in particular at least part of the lubricant from the lubricant channel can be conveyed through the leakage groove in a gravity-assisted manner. Thus, the lubricant supply from the lubricant channel to the at least one lubricant pocket can thus be realized in a gravity-assisted manner and thus passively. This makes it possible to provide the leakage groove with a small flow cross section in order to provide a desired conveying flow along the leakage groove, whereby the load-bearing capacity of the plain bearing can be increased.

[0027] In particular, the outer transmission part or the inner transmission part is designed as a fixed transmission housing part. This facilitates the connection of the lubricant source and / or the lubricant drain to the lubricant channel. Thus, unnecessary rotary joints can be avoided.

[0028] Another aspect of the invention relates to a vertical transmission, in particular for operating a vertical mill, which has a substantially vertically oriented shaft and a lubricant conveying device, which lubricant conveying device can be formed and developed as described above, wherein the shaft forms an inner transmission part or an outer transmission part. A suitable vertical mill is described, for example, in DE 10 2007 057 608 A1, the content of which is hereby incorporated by reference as part of the present invention. The vertical transmission and / or the vertical mill formed by means of the vertical transmission can be formed and developed in particular as described above. Due to the use of the sliding bearing device of the transmission part as a rotary joint for the lubricant channel, a separate seal can be omitted and, on the contrary, by means of a leakage groove leading to a lubricant pocket, a slight leakage of the auxiliary sliding bearing device can be allowed, thereby allowing a low-cost and reliable supply of lubricant to the vertical transmission and / or the vertical mill.

[0029] Preferably, the shaft is connected to the planet carrier of the planetary transmission in a co-rotating manner, wherein in particular the grinding disk of the vertical mill is fastened to the planet carrier. Mounted on the planet carrier can be at least one planetary wheel, preferably three, five or seven planetary wheels, which mesh with the sun wheel and / or the ring gear. The ring gear is in particular fixed and non-rotatable, wherein the ring gear is preferably fastened to the housing part of the vertical transmission and / or the vertical mill in an immovable manner. The sun wheel can be fastened to a sun wheel shaft, which can be driven by a drive motor, preferably through at least one intervening transmission ratio stage. The lubricant of the lubricant channel can be guided into the shaft, in particular via the housing and a lubricant conveying device formed between the housing and the shaft, where the lubricant can be guided along the shaft to the axial plain bearing supporting the grinding disk.

[0030] Another aspect of the invention relates to an industrial application with a transmission, in particular a vertical transmission, which can be formed and developed as described above, wherein the transmission has at least one transmission part to be lubricated and at least one lubricant conveying device, which can be formed and developed as described above, for conveying lubricant to the transmission part to be lubricated. The industrial application can have a drive device, which can be designed as a rotor driven by, for example, an electric machine, an internal combustion engine, a hydraulic motor or a wind. The drive device can be coupled to a transmission device for converting the torque and speed of the power generated by the drive device, wherein the transmission device can be formed and developed as described above. The transmission device of the industrial application can be coupled to a mechanical application in a torque-transmitting manner, in which the mechanical energy introduced via the transmission device can be used. The mechanical application can include, for example, a grinder, a vertical grinder, a sugar mill, a cement mill, a stone crusher, a conveyor belt, a pump, a roller press, a plate belt, a tube mill, a rotary kiln, a rotating mechanism, a stirrer, a lifting device, a garbage press, a waste press, a crusher for materials that can be recovered from waste that is optionally previously separated and / or sorted, etc. By using the plain bearing of the transmission component as a rotary joint for the lubricant channel, a separate seal can be omitted and slight leakage of the plain bearing can be assisted by the leakage groove leading to the lubricant pocket, thereby providing a low-cost and reliable lubricant supply for industrial applications.

[0031] Another aspect of the invention relates to a data aggregate comprising data packages, which are combined in a common file or distributed in different files, for depicting the three-dimensional design and / or interaction of all the components provided in a lubricant delivery device, which can be formed and developed as described above, wherein the data packages are prepared for performing additive manufacturing of the components of the lubricant delivery device, in particular by 3D printing, and / or simulation of the operation of the lubricant delivery device when processed by a data processing device. In the manner of a so-called "digital twin", the data aggregate can represent a virtual embodiment of the corresponding device of a vertical transmission device and / or a vertical mill, in particular the above-mentioned lubricant delivery device, which allows virtual inspection in the form of simulation or real materialization by means of additive manufacturing methods. In particular, each data package can represent a separate implementation of the component components of the respective relevant device, so that the respective component components can be easily assembled in their relative positions and / or with relative mobility, actually and / or virtually, in order to realize the interaction that is essential to the invention. This makes it possible to produce prototypes at low cost and / or to perform low-cost computer-based simulations, so as to study the operation of the lubricant delivery device, the vertical transmission device and / or the vertical mill, identify problems in actual application and find ways to improve them. Due to the use of the sliding bearing arrangement of the transmission component as a rotary joint for the lubricant channel, a separate seal can be omitted and, on the contrary, slight leakages of the auxiliary sliding bearing arrangement can be tolerated by means of a leakage groove leading to a lubricant pocket, thereby allowing a low-cost and reliable lubricant supply, which can be easily and inexpensively checked with the aid of a data aggregate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention is explained below by way of example with reference to the accompanying drawings, with the aid of preferred exemplary embodiments, wherein the features described below may each represent an aspect of the present invention individually or in combination. The accompanying drawings show:

[0033] Figure 1 shows a schematic cross-sectional view of a first embodiment of a lubricant delivery device;

[0034] Figure 2 shows a schematic cross-sectional view of a second embodiment of a lubricant delivery device;

[0035] Figure 3 a schematic cross-sectional view showing a third embodiment of a lubricant delivery device, and

[0036] Figure 4 A schematic cross-sectional view of a fourth embodiment of a lubricant delivery device is shown. DETAILED DESCRIPTION

[0037] Figure 1The lubricant delivery device 10 shown can be part of a vertical transmission for a vertical mill and has, in the exemplary embodiment shown, a vertically oriented axis of rotation 12, about which an inner transmission part 14 can rotate. The inner transmission part 14 is designed, for example, as a planet carrier of a planetary transmission, wherein the planet carrier can be connected to a grinding disk (not shown) of the vertical mill in a co-rotating manner. The grinding disk can be mounted and supported in an axial plain bearing to be lubricated. The inner transmission part 14 is mounted in an outer transmission part 18 via a plain bearing 16. In the exemplary embodiment shown, the plain bearing 16 designed as a radial plain bearing is fixedly connected to the outer transmission part 18, for example pressed in and / or mechanically fastened to the outer transmission part 18 via a threaded device 19. However, the plain bearing 16 can also be fixedly connected to the inner transmission part 14 and undergo a rotation relative to the outer transmission part 18. The outer transmission part 18 is in particular part of a fixed transmission housing, to which the ring gear (not shown) of the planetary transmission is preferably connected to fix against movement. The planetary gears (not shown) can mesh with a ring gear and a sun gear (not shown) of a sun gear shaft (not shown), wherein the sun gear shaft can be driven by a drive motor, preferably via at least one transmission ratio stage designed as a spur gear stage and / or a bevel gear stage.

[0038] A lubricant pocket 20 is formed in the bearing gap between the plain bearing 16 and the inner transmission part 14, which is enlarged for better illustration. In the exemplary embodiment shown, the lubricant pocket 20 is formed only in the plain bearing 16, at least one or all lubricant pockets 20 may also be formed additionally or alternatively by the inner transmission part 14. In the exemplary embodiment shown, the lubricant pocket can be supplied with lubricant via a connecting channel 21, which extends through the plain bearing 16 and the outer transmission part 18. Alternatively, however, the connecting channel 21 can also be omitted, so that the lubricant pocket 20 is supplied with lubricant, in particular lubricating oil, only via the bearing gap and the leakage groove 30.

[0039] In order to supply lubricant to a transmission component to be lubricated, such as an axial sliding bearing for a grinding disc, downstream of the lubricant delivery device 10, a lubricant channel 22 is provided, which has a supply channel 26 passing through the outer transmission component 18 and the sliding bearing 16 and an annular groove 24 formed in the sliding bearing 16, and a discharge channel 28 which is connected to the bearing gap between the sliding bearing 16 and the inner transmission component 14 and is formed in the inner transmission component 14.

[0040] In principle, the lubricant channel 22 can be formed separately from the lubricant pocket 20 and the associated connecting channel 21. In the present embodiment, however, a leakage groove 30 is provided, via which the lubricant channel 22 is in fluid communication with the lubricant pocket 20 in addition to the bearing clearance of the sliding bearing 16 with a larger flow cross section than the bearing clearance of the sliding bearing 16. This enables the lubricant pocket 20 to be supplied with lubricant branching off from the lubricant channel 22, so that the lubricant supply to the lubricant pocket 20 via the connecting channel 21 is smaller in size or can even be omitted completely. Figure 1 In the embodiment shown, the supply channel 26 of the lubricant channel 22 opens into the bearing gap of the sliding bearing 16 in the axial direction between the lubricant pockets 20, so that the leakage grooves 30 connected to the corresponding lubricant pockets 20 are arranged in two axial directions. In the exemplary embodiment shown, the leakage grooves 30 are formed only by the inner transmission component 14, and the leakage grooves 30 can also be formed by the sliding bearing 16 in addition or alternatively.

[0041] exist Figure 2 In the embodiment of the lubricant delivery device 10 shown, Figure 1 Compared to the embodiment of the lubricant delivery device 10 shown, only one lubricant pocket 20 is formed in the axial direction. The supply channel 26 of the lubricant channel 22 can open into the bearing gap of the sliding bearing 16 above the lubricant pocket 20, so that lubricant can be supplied from the lubricant channel 22 via the leakage groove 30 to the lubricant pocket 20 in a gravity-assisted manner.

[0042] exist Figure 3 In the embodiment of the lubricant delivery device 10 shown, Figure 1Compared to the embodiment of the lubricant conveying device 10 shown, the plain bearing 16 is provided with a collar 32, which bears axially against the inner transmission part 14, protrudes radially inwards from the rest of the plain bearing 16 and defines the axial insertion depth of the plain bearing 16 on the inner transmission part 14. At the same time, the collar 32 can push against a closure 34 designed as a plug for the axial extension of the outlet channel 28 of the lubricant channel 22, thereby improving the sealing effect. Alternatively, the rotary joint between the supply channel 26 and the outlet channel 28 of the lubricant channel 22 can be formed axially on the end side between the collar 32 and the unclosed opening in the outlet channel 28 facing the collar 32. Additionally or alternatively, a part of the connecting channel 21 leading to the lubricant pocket 20, in particular an axially extending part, can also be formed in the plain bearing 16, wherein the connecting channel 21 formed in the plain bearing 16 can be formed at least partially in the collar 32 and / or in a part of the plain bearing 16 that is different from the collar 32. In particular, the connecting channel 21 branches off from the supply channel 26, preferably within the sliding bearing 16. Alternatively, however, the connecting channel 21 can also be omitted, so that the lubricant pocket 20 is only supplied with lubricant, in particular lubricating oil, via the bearing gap and the leakage groove 30.

[0043] exist Figure 4 In the embodiment of the lubricant delivery device 10 shown, Figure 1 Compared to the embodiment of the lubricant delivery device 10 shown, the plain bearing 16 is provided with a collar 32 which bears axially against the outer transmission part 18, projects radially outwards from the rest of the plain bearing 16 and defines the axial insertion depth of the plain bearing 16 on the outer transmission part 18. Figure 3 With the described design of the lubricant conveying device 10, the collar 32 can push against a closure designed as a plug for the axial extension of the supply channel 26 of the lubricant channel 22, thereby improving the sealing effect. Alternatively, the lubricant conveying between the plain bearing 16 and the outer transmission part 18 of the supply channel 26 of the lubricant channel 22 can be formed axially on the end side between the collar 32 and an unclosed opening in the outer transmission part 18 facing the collar 32.

Claims

1. A lubricant delivery device (10) for supplying lubricant to a transmission device, comprising: External transmission component (18); an inner transmission component (14) rotatable relative to the outer transmission component (18); a sliding bearing (16) for supporting the outer transmission component (18) on the inner transmission component (14), wherein at least one lubricant pocket (20) is formed between the outer transmission component (18) or the inner transmission component (14) and the sliding bearing (16), wherein the lubricant channel (22) leading through the outer transmission component (18), the sliding bearing (16) and the inner transmission component (14) is designed to supply the transmission component to be lubricated which is arranged at the downstream end of the lubricant channel (22), The lubricant passage (22) extends through the lubricant bag (20), and a leakage groove (30) is formed between the outer transmission component (18) or the inner transmission component (14) and the sliding bearing (16) to fluidically connect the lubricant passage (22) to the lubricant bag (20).

2. The lubricant delivery device (10) according to claim 1, wherein: A leakage gap height H of the leakage groove (30) in the radial direction is greater than a bearing gap height h between the outer transmission component (18) or the inner transmission component (14) and the sliding bearing (16), wherein in particular 1.01≤H / h≤2.00, preferably 1.10≤H / h≤1.75, and particularly preferably 1.25≤H / h≤1.

50.

3. The lubricant delivery device (10) according to claim 1 or 2, wherein: A connecting channel (21) is provided into the lubricant bag (20), wherein the connecting channel (21) is fluidly connected to a lubricant source for feeding lubricant to the lubricant bag (20) and / or a lubricant drain for draining lubricant originating from the lubricant channel (22).

4. The lubricant delivery device (10) according to any one of claims 1 to 3, wherein: The sliding bearing (16) has a radially protruding collar (32) for axially abutting against the outer transmission component (18) or against the inner transmission component (14).

5. The lubricant delivery device (10) according to claim 4, wherein: The collar (32) covers a closure (34) and / or a sealing element for an axially facing opening in a part of the lubricant channel (22), in particular sealing the closure (34) and / or the sealing element with a pressing force.

6. The lubricant delivery device (10) according to claim 4, wherein: The collar (32) covers an axially facing opening in a portion of the lubricant passage (22) and forms another portion of the lubricant passage (22) communicating with the portion.

7. The lubricant delivery device (10) according to any one of claims 4 to 6, wherein: The collar (32) covers an axially facing opening in a connection channel (21) communicating with the lubricant bag (20) and formed separately from the lubricant channel (22), and forms another connection channel communicating with the connection channel (21).

8. The lubricant delivery device (10) according to any one of claims 1 to 7, wherein: At least two lubricant pockets (20) are formed axially one after another at least partially within a common circumferential angle range, wherein the lubricant channel (22) is guided axially between the two lubricant pockets (20) and the lubricant channel (22) is fluidically connected to the lubricant pockets (20) via respective leakage grooves (30) leading away from the lubricant channel (22) in different axial directions.

9. The lubricant delivery device (10) according to any one of claims 1 to 7, wherein: The leakage groove (30), in particular only exactly one leakage groove (30), leads away from the lubricant channel (22) in only one axial direction, wherein the lubricant pocket (20), in particular only exactly one lubricant pocket (20), is formed in, in particular only exactly one axial region.

10. The lubricant delivery device (10) according to any one of claims 1 to 9, wherein the leakage groove (30) extends mainly in the vertical direction, wherein in particular at least a portion of the lubricant from the lubricant channel (22) can be conveyed through the leakage groove (30) in a gravity-assisted manner.

11. The lubricant delivery device (10) according to any one of claims 1 to 10, wherein: The outer transmission part (18) or the inner transmission part (14) is designed as a fixed transmission housing part.

12. A vertical transmission device, in particular for operating a vertical mill, having a substantially vertically oriented shaft and a lubricant delivery device (10) according to any one of claims 1 to 11, wherein: The shaft forms the inner transmission part (14) or the outer transmission part (18).

13. The vertical transmission device according to claim 12, wherein: The shaft is connected in rotation co-axially to a planet carrier of a planetary transmission, wherein in particular a grinding disk of a vertical mill is fastened to the planet carrier.

14. An industrial application having a transmission device, in particular a vertical transmission device according to claim 12 or 13, wherein the transmission device has at least one transmission component to be lubricated and at least one lubricant delivery device (10) according to any one of claims 1 to 11, wherein the lubricant delivery device (10) is used to deliver lubricant to the transmission component to be lubricated.

15. A data aggregate comprising data packages, the data packages being combined in a common file or distributed in different files, for depicting the three-dimensional design and / or interaction of all constituent parts provided in a lubricant delivery device (10) according to any one of claims 1 to 11, wherein: The data packets are prepared for performing additive manufacturing of components of the lubricant delivery device (10), in particular by 3D printing, and / or simulation of the operation of the lubricant delivery device (10) when processed by a data processing device.

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