CLEANING DEVICE AND METHOD FOR DRIVING A CLEANING DEVICE

Description

[0001] The invention relates to a cleaning device for cleaning a container, in particular an orbital cleaner, and a method for driving a cleaning device.

[0002] Cleaning devices of the type mentioned above are well known. They are used, for example, in the food and beverage industry for the hygienic and, in particular, sterile cleaning of containers.

[0003] So-called orbital cleaners work on the basis of two rotating axes, a vertical and a horizontal axis, around which a round jet nozzle rotates in such a way that a highly concentrated jet of water or cleaning agent with high impact force ensures intensive cleaning of the surfaces of tanks and containers.

[0004] Such cleaning devices are usually driven by the inflowing fluid, in particular the cleaning agent, itself. A rotor is arranged in the flow path of the fluid flowing into the cleaning device in such a way that the rotor is driven depending on the flow velocity. The rotation of the rotor drives the cleaning device, and in particular a nozzle head for such a cleaning device, around a first axis.

[0005] In this context, US 8 814 061 B1 shows a cleaning device according to the preamble of claim 1.

[0006] An object of the present invention is therefore to provide an improved cleaning device.

[0007] The invention solves the above-mentioned problem by a cleaning device according to claim 1.

[0008] In particular, the invention proposes a cleaning device of the type mentioned at the outset, comprising: a housing with a fluid inlet for admitting a fluid, in particular cleaning agent, a rotor which is rotatably driven relative to the housing about a first axis of rotation, a nozzle head with a fluid outlet for dispensing the fluid, in particular cleaning agent, wherein the nozzle head is mounted on the rotor so as to be rotatable about a second axis of rotation, a flow channel for fluidly connecting the fluid inlet and the fluid outlet, a passage which is fluidly configured to guide a portion of the flowing fluid to the rotor in order to apply a drive torque and to drive the rotor in rotation, and a drive unit which is coupled on the drive side to the rotor and on the output side to the nozzle head and is configured to transmit the drive torque of the rotor to the nozzle head.

[0009] The invention encompasses the recognition that, in cleaning devices of the type mentioned above, the arrangement of the rotor in the flow path limits the design variety of such cleaners. The invention further encompasses the recognition that the arrangement of the rotor in the flow path causes turbulent flows or flow disturbances, thus impairing the drive of the nozzle head. In this context, the invention encompasses the recognition that, due to the drive of the nozzle head depending on the flow velocity, these turbulences and flow disturbances lead to discontinuity and impairment of the control of the nozzle head.

[0010] A particular advantage of the invention is that a passage configured to conduct a portion of the flowing fluid to the rotor enables reliable drive of the rotor while simultaneously preventing impairment or the creation of turbulence in the flowing fluid between the fluid inlet and the fluid outlet. Furthermore, such a passage advantageously enables the generation of a pressure-controlled drive torque, which is thus no longer controlled solely by the flow velocity of the flowing fluid. This increases the design versatility of such an advantageous cleaning device and enables the controllability of the drive depending on the pressure.

[0011] According to the invention, the rotor or the housing has at least one rolling element, wherein the housing or the rotor has at least one rolling surface arranged coaxially to the rotor, and the part of the flowing fluid is guided to the rotor in such a way that the rolling element is moved along the rolling surface by the fluid. Thus, by driving a rolling element along a rolling surface arranged coaxially to the rotor, a drive torque is applied to the rotor. Such a rolling element is preferably coupled to the rotor in such a way that the rolling element is moved along the rolling surface and thus around the first axis of rotation, such that the rotor rotates relative to the housing about the first axis of rotation.

[0012] Preferably, the rolling surface is formed by an inner wall of the housing, which is in particular rotationally symmetrical and extends around the first axis of rotation and in the axial direction. Alternatively, the rolling surface is formed by an outer wall of the rotor, which is in particular rotationally symmetrical and extends around the first axis of rotation. In both cases, a compact design can be ensured and the rolling element can rotate within the housing in such a way that a drive torque is applied to the rotor. The inner wall extends at least along a portion of the rolling element in the axial direction, so that the latter is guided along the inner wall that forms the rolling surface. The at least one rolling element can preferably be arranged radially within the rolling surface.In this way, for a given size of the device, a higher torque is achieved than in an alternative, likewise preferred embodiment in which the at least one rolling body is arranged radially outside the rolling surface, so that the rolling surface is located between the at least one rolling body and the axis of rotation.

[0013] According to a particularly preferred embodiment, the distance of the rolling surface from the rotational axis is not constant, so that the rolling surface has at least a first section in which the distance decreases and at least a second section in which the distance increases. Thus, in addition to the movement of the rolling element in the circumferential direction, a movement of the rolling element in the radial direction is also generated, which depends on the distance of the rolling surface from the rotational axis. Thus, a movement of the rolling element in the radial direction also leads to a movement of the rolling element in the circumferential direction along the rolling surface.

[0014] Preferably, the rotor has a plurality of rolling elements and the rolling surface has a plurality of first sections in which the distance decreases and a plurality of second sections in which the distance increases, wherein a first section is arranged adjacent to a second section. In the second section, a movement of the rolling element radially outwards thus simultaneously leads to a movement in the circumferential direction. Subsequently, an adjacent rolling element can be driven radially outwards by the flowing fluid so that it too is moved in a defined area in the circumferential direction. The successive movement in the circumferential direction of the plurality of rolling elements causes the rotor to rotate about the first axis of rotation.

[0015] Preferably, the distance of the rolling surface from the rotational axis can be described as a function A = sin α. This results in a uniform increase and decrease in the distance of the rolling surface from the rotational axis, and thus a uniform movement of the rolling element in the radial direction between a maximum deflection and a maximum deflection position in the radial direction.

[0016] Preferably, the passage is fluidically connected to a pressure chamber for pressurized fluid, formed at least partially by the flow channel. This allows pressurized fluid to enter the passage particularly easily.

[0017] Alternatively or additionally, the passage can be fluidically connected to a pressure chamber for pressurized fluid formed at least partially by an interior space of the rotor.

[0018] According to a further preferred embodiment, the drive unit comprises: a drive shaft for driving the nozzle head, which is arranged coaxially to the second axis of rotation and coupled to the rotor in such a way that the drive shaft is driven with the rotor about the first axis of rotation, and a receptacle that is stationary relative to the first and second axes of rotation, wherein the drive shaft engages with the stationary receptacle in such a way that the drive torque of the rotor is transmitted to the drive shaft and the drive shaft rotates about the second axis. Thus, the rotation of the rotor and of the drive shaft coupled to the rotor about the first axis of rotation simultaneously applies a torque to the drive shaft of the drive unit, which drives the drive shaft about the second axis of rotation in such a way that the nozzle head is driven in rotation about the first axis of rotation and the second axis of rotation.

[0019] Preferably, the stationary mount has a stationary bevel gear which is arranged coaxially to the first axis of rotation and is tapered on the rotor side, and the drive shaft has a drive bevel gear for torque-transmitting coupling with the stationary bevel gear, which is arranged coaxially to the second axis of rotation and is tapered in the direction of the first axis of rotation. Thus, the drive unit is designed in the manner of a bevel gear transmission, which comprises the first axis of rotation and a second axis of rotation which is arranged at an angle to the first axis of rotation and which have a common intersection point. The power is transmitted via the first and the drive bevel gear. Such a bevel gear preferably has external teeth, wherein the teeth of the drive bevel gear roll or slide along the teeth of the stationary bevel gear. The sliding orRolling is generated by the relative movement of the drive bevel gear relative to the stationary bevel gear. The stationary bevel gear is preferably a ring gear, and the drive bevel gear is preferably a pinion. The bevel gears mesh with each other such that both a relative movement of the drive bevel gear about the first rotational axis in a first rotational direction and in a second rotational direction results in the transmission of the drive torque of the rotor about the first rotational axis to the drive shaft.

[0020] According to a further preferred embodiment, the flow channel has a first cross-sectional area and the passage has a second cross-sectional area, wherein the second cross-sectional area is smaller than the first cross-sectional area. Thus, the flow velocity of the fluid in the passage can be increased by the second cross-sectional area being smaller than the first cross-sectional area. Thus, even with a comparatively slow flow of the fluid in the flow channel, a faster rotational movement of the nozzle head about the first and second rotational axes can be generated.

[0021] Furthermore, the first cross-sectional area of ​​the flow channel may be smaller than the second cross-sectional area of ​​the passage, so that the flow velocity of the fluid may be high and a comparatively slow rotation of the nozzle head about the first axis and the second axis is generated.

[0022] Preferably, the housing has a cylindrical section arranged coaxially to the first axis of rotation, which forms a section of the flow channel, and wherein the stationary bevel gear is formed at a rotor-side end of the cylindrical section. Thus, the stationary receptacle is formed by the cylindrical section, which has the stationary bevel gear on the rotor side. The design of the housing is thus made more compact, since a part of the flow channel, namely the part of the flow channel which has the fluid inlet and can be coupled to a supply line, forms the stationary receptacle. This part of the flow channel is conventionally designed to be stationary, since a secure fluid-conducting connection to the supply line must be ensured.

[0023] According to a further preferred embodiment, the rotor has a cage for guiding the rolling element in the radial direction, which cage is arranged coaxially to the first axis of rotation and is configured to rotate with the rolling element about the first axis of rotation. Thus, the majority of the rolling elements are coupled to one another and guided in the radial direction. A movement of one rolling element in the circumferential direction thus causes a movement in the circumferential direction of all rolling elements guided by the cage. The movement of one rolling element radially outward through a portion of the flowing fluid thus equally causes a relative movement in the circumferential direction of all rolling elements.

[0024] Preferably, the cage is at least partially mounted on the housing, and the rolling element is guided by the cage such that the rolling element can move radially between the cage and the rolling surface. This ensures a guided movement of the rolling element in the radial direction.

[0025] Further preferably, the cage has a plurality of receptacles which are arranged along an outer circumference of the cage and are designed to each at least partially accommodate a rolling element and guide it in the radial direction. By means of such receptacles, which guide the rolling element in the radial direction, the plurality of rolling elements can be accommodated by the cage in such a way that they are movable within the receptacles in the radial direction between the rolling surface and an inner contact surface of the respective receptacle. Preferably, the passage is fluidly connected to at least one receptacle, such that a portion of the flowing fluid is introduced between the rolling element and an inner contact surface of the receptacle and strikes the rolling element in such a way that it is pushed radially outwards.

[0026] Preferably, the rolling elements are cylindrical, and the receptacle is partially cylindrical, corresponding to the rolling elements. Such a cylindrical design prevents the rolling element from jamming within the receptacle.

[0027] Preferably, the receptacles each have an opening facing away from the housing, which can be fluidly connected to the passage. Thus, a portion of the flowing fluid can be introduced through the opening between the rolling element and an inner contact surface of the receptacle in such a way that the rolling element is pushed radially outward.

[0028] According to a further preferred embodiment, the rotor further comprises a cover element configured to close the openings, and wherein the cover element has a plurality of channels that can be fluidly connected to the passage. Thus, depending on the channels of such a cover element, a defined inflow of at least a portion of the flowing fluid into the receptacle for the rolling elements can be ensured, so that the respective rolling element is moved radially outward in the receptacle.

[0029] Further preferably, at least one outflow channel is formed in such a cover element, from which the fluid located in the receptacle can flow out after the respective rolling body has been moved radially outwards.

[0030] The invention has been described above with respect to a first aspect.

[0031] The invention further relates, in a second aspect, to a method for driving a cleaning device, in particular a cleaning device of the type described above.

[0032] The invention solves the above-described problem in a second aspect by the subject matter of claim 17.

[0033] In particular, the invention proposes a method for driving a cleaning device, in particular a method for driving a cleaning device of the type described above, the method comprising the steps: Introducing a fluid, in particular a cleaning agent, into a housing, directing a portion of the flowing fluid to a rotor, driving the rotor by the portion of the flowing fluid about a first axis of rotation relative to the housing, providing a drive unit which is coupled to the rotor on the drive side and to a nozzle head on the output side, transmitting the torque of the rotor to the nozzle head by the drive unit, and discharging the fluid through a fluid outlet of the nozzle head.

[0034] The method according to the invention and its possible developments have features or method steps which make them particularly suitable for use for a cleaning device according to the previous aspect and the respective developments.

[0035] For further advantages, design variants and design details of this further aspect and its possible further developments, reference is made to the previous description of the corresponding features and further developments of the cleaning device.

[0036] The invention will now be explained using a preferred embodiment with reference to the accompanying figures. They show: Figure 1: a sectional view of a cleaning device according to the invention; Figure 2: a housing for the cleaning device according to Figure 1 in a perspective view; Figure 3: a cage for the cleaning device according to Figure 1 in a perspective view; Figure 4: a cover element for the cleaning device according to Figure 1 in a perspective view; Figure 5: a rolling element for the cleaning device according to Figure 1 in a perspective view; Figure 6: a bevel gear for the cleaning device according to Figure 1 a perspective view.

[0037] The Figure 1 The cleaning device 100 shown comprises a housing 110, a rotor 120 with a first rotation axis 122 and a nozzle head 130 with a second rotation axis 134.

[0038] The housing 110 has a fluid inlet 112 for admitting fluid.

[0039] The rotor 120 is rotatably driven relative to the housing 110 about the first rotation axis 122 and has a plurality of rolling elements 124 which are in rolling contact with the housing 110.

[0040] The nozzle head 130 is mounted on the rotor 120 for rotation about the second axis 134. The nozzle head 130 has a fluid outlet 132 for discharging fluid.

[0041] The cleaning device 100 further comprises a flow channel 140 for fluid-conducting connection of the fluid inlet 112 and the fluid outlet 132.

[0042] Furthermore, the cleaning device 100 comprises a passage 142, which is preferably fluidically connected to a pressure chamber for pressurized fluid formed by the flow channel 140 and is configured to guide a portion of the flowing fluid to the rotor 120 in order to apply a drive torque and drive the rotor 120 in rotation about the first rotation axis 122. Additionally or alternatively, the passage 142 can be fluidically connected to a pressure chamber for pressurized fluid formed by an interior of the rotor 120.

[0043] The cleaning device 100 further comprises a drive unit 150, which is coupled on the drive side to the rotor 120 and on the output side to the nozzle head 130 and is configured to transmit the drive torque of the rotor 120 to the nozzle head 130.

[0044] Preferably, the drive unit 150 comprises a drive shaft 152 for driving the nozzle head 130, which is arranged coaxially with the second rotation axis 134. The drive shaft 152 is coupled to the rotor 120 such that the drive shaft 152 is driven by the rotor 120 about the first rotation axis 122.

[0045] The drive unit 150 further comprises a stationary receptacle 154 with respect to the first and second rotational axes 122, 134. The drive shaft 152 is engaged with the stationary receptacle 154 such that the drive torque of the rotor 120 is transmitted to the drive shaft 152 and the drive shaft 152 rotates about the second rotational axis 134.

[0046] The stationary mount 154 is arranged on the housing 110 at a rotor-side end section. The stationary mount 154 has a stationary bevel gear 156, and the drive unit 150 further has a drive bevel gear 158 arranged on the drive shaft 152. The stationary bevel gear 156 is coupled to the drive bevel gear 158 in a torque-transmitting manner. The drive bevel gear 158 is coupled to the drive shaft 152 in such a way that the drive torque of the rotor 120 is transmitted from the stationary bevel gear 156 to the drive bevel gear 158 and finally to the drive shaft 152, so that the nozzle head 130 rotates about the first rotational axis 122 and the second rotational axis 134.

[0047] The cleaning device 100 further comprises a cage 160 for guiding the at least one rolling element 124, which is assigned to the rotor 120 and arranged coaxially with the first rotation axis 122. Preferably, the cage 160 is configured to guide the at least one rolling element 124 in the radial direction.

[0048] The cage 160 is partially received in the housing 110 and configured to rotate with the at least one rolling element 124 about the first rotation axis 122.

[0049] The rolling elements 124 are guided in the cage 160 such that the at least one rolling element 124 is movable in the radial direction between the cage 160 and the housing 110.

[0050] The cleaning device 100 further comprises a cover element 170, which is configured to cover or close the cage 160 at least in sections. The cover element 170 is fluidly connectable to the flow channel 140 and in particular to the passage 142.

[0051] The cleaning device 100 further comprises a first pair of bearing rings 180, which are configured to support the rotor 120 on the housing 110 for rotation about the first rotation axis 122. The cleaning device further comprises a second bearing ring 182 and a third bearing ring 184, which are configured to support the nozzle head 130 and the drive shaft 152 on the rotor 120 for rotation about the second rotation axis 134.

[0052] The Figures 2 to 6 show detailed representations of the housing 110, the cage 160, the cover element 170, the rolling element 124 and a part of the drive unit 150 of the cleaning device according to Figure 1 .

[0053] As in particular Figure 2 shows, the housing 110 comprises an inner wall 114 which has a rolling surface 116 for the at least one rolling element 124 (cf. Figure 1 ) is trained. According to the preferred, in the Figures 1 and 2 In the illustrated embodiment, the at least one rolling body 124 is arranged radially within the rolling surface 116. Alternatively, but not shown, the at least one rolling body 124 is arranged radially outside the rolling surface 116, so that the rolling surface 116 is located between the at least one rolling body 124 and the rotation axis 122.

[0054] The rolling surface 116 comprises a plurality of first sections 116a, in which the distance of the rolling surface 116 from the first rotational axis 122 decreases, and a plurality of second sections 116b, in which the distance of the rolling surface 116 from the first rotational axis 122 increases. In each case, a first section 116a is arranged adjacent to a second section 116b, so that the change in the distance of the rolling surface 116 from the first rotational axis 122 changes, and the change repeats cyclically.

[0055] The housing 110 further comprises a cylindrical section 118 arranged coaxially to the first rotation axis 122, which forms a section of the flow channel 140 (cf. Figure 1 ). On the cylindrical section 118, at an end on the rotor side in the assembled state, the stationary receptacle 154 of the drive unit 150 with the stationary bevel gear 156 (cf. Figure 1 ) trained.

[0056] Furthermore, the passage 142 is formed on the cylindrical portion 118, which extends towards the inner surface 114 of the housing 110 and is designed to convey a part of the fluid within the flow channel 140 (cf. Figure 1 ) flowing fluid into the housing 110 and thus to the rolling element 124 (cf. Figure 1 ) so that it performs a rolling movement along the rolling surface 116.

[0057] Due to the adjacent first and second sections 116a, b, a rolling movement of the rolling element 124 is caused (cf. Figure 1 ) in the circumferential direction simultaneously a movement in the radial direction.

[0058] Figure 3 shows the cage 160, which is designed to hold the rolling elements 124 (cf. Figure 1 ) in the radial direction in the housing 110 (cf. Figure 1 and 2 ). The cage 160 is, in the assembled state, attached to the rotor 120 (cf. Figure 1) and arranged coaxially to the first rotation axis 122.

[0059] The cage 160 has a plurality of preferably partially cylindrical receptacles 162, which are arranged along an outer circumference of the cage 160 and are designed to each accommodate a rolling element 124 (cf. Figure 1 and 5 ) and to guide them in the radial direction such that the rolling elements 124 are guided and movable in the radial direction between the cage 160 and the rolling surface 116. The receptacles 162 correspond to the rolling elements 124 (cf. Figure 5 ) are partially cylindrical and each have a straight wall section 164 through which the rolling elements 124 are guided in the radial direction. Preferably, the number of rolling elements 124 is unequal to the number of associated valleys in the rolling surface 116 formed by the sections 116a and 116b.

[0060] The receptacles 162 each have an opening 166 facing away from the housing 110 in the assembled state, which is fluidically connected to the passage 142 (cf. Figure 1 and 2 ). The receptacles 162 are evenly distributed along the outer circumference.

[0061] The cage 160 further includes a centrally formed cylindrical opening 168 which is configured to receive the cylindrical portion 118 of the housing 110 (see Figure 1 and 2 ) at least in sections.

[0062] As in particular Figure 4 shows, the cover element 170 is designed as a disc which, in the assembled state, is arranged coaxially to the first axis of rotation 122.

[0063] The cover element 170 has a plurality of channels 172, which are arranged evenly distributed in the circumferential direction and, in the assembled state, are fluidly connected to the passage 142 (cf. Figure 1) in order to direct a part of the flowing fluid to the rolling elements 124 (cf. Figure 1 ) to lead.

[0064] The cover element 170 further has a further central cylindrical opening 174 (second cylindrical opening) which is designed to receive the cylindrical portion 118 of the housing 110 at least in sections.

[0065] Figure 5 shows the rolling element 124 in a perspective view. In the assembled state, each of the receptacles 162 (cf. Figure 3 ) such a rolling element 124 is accommodated so as to be movable in the axial direction.

[0066] Through the fluid which flows through the channels 172 into the receptacles 162 (cf. Figure 3 and 4 ), and by passage 142 (cf. Figure 2 ) is directed to the rolling element 124, the rolling element 124 is pressed radially outward. The rolling element 124 is thereby brought into contact with the rolling surface 116 (cf. Figure 2) in such a way that each of the rolling elements 124 from a position in which it is in the first section 116a of the rolling surface 116 (cf. Figure 2 ) is moved along the second portion 116b, causing the rolling element 124 to move radially outward. This movement allows the rolling element 124 to escape the pressure exerted by the inflowing fluid.

[0067] As a result of this radially outward deflection movement, a rolling element 124 rolls along the second section 116b to a point at which the distance of the contact surface 116 from the rotation axis 122 is maximum. Subsequently, the radially outward movement of another rolling element 124 leads to the continuation of this rolling movement. This movement is repeated, resulting in a continuous rolling movement depending on the pressure of the fluid flowing through the flow channel 140.

[0068] Figure 6shows the drive bevel gear 158, which has an external toothing 158a. The external toothing 158a is used to transmit the drive torque to the stationary bevel gear 156 of the stationary holder 154 (cf. Figure 1 and 2 ) into action.

[0069] The drive bevel gear 158 is designed, in the assembled state, to rotate together with the rotor 120 about the first rotation axis 122 and thus about the stationary holder 154 (cf. Figure 1 ). Due to the inclination of the external toothing 158a, the rotational movement about the first rotational axis 122 simultaneously causes a rotation of the drive bevel gear 158 about the second rotational axis 134.

[0070] In the assembled state, the second cone 158 is connected to the drive shaft 152 (cf. Figure 1 ) such that the drive shaft 152 rotates together with the drive bevel gear 158 about the second rotation axis 134.

[0071] Thus, by means of the rolling elements 124, a rotational movement of the rotor 120 about the first rotational axis 122 is effected, which is transmitted to the drive shaft 152 by means of the drive unit 150, so that the nozzle head 130 rotates about the first rotational axis 122 and the second rotational axis 134 and the flowing fluid is distributed through the fluid outlet 132 in the radial direction about the first and second rotational axes 122, 134 for cleaning in a container (cf. Figure 1 ). List of reference symbols

[0072] 100Cleaning device 110Housing 112Fluid inlet 114Inner wall 116Rolling surface 116aFirst section 116bSecond section 118Cylindrical section 120Rotor 122First rotational axis 124Rolling element 130Nozzle head 132Fluid outlet 134Second rotational axis 140Flow channel 142Passage 150Drive unit 152Drive shaft 154Stationary mount 156Drive bevel gear 158Stationary bevel gear 160Cage 162Partially cylindrical mount 164Straight wall section 166Opening 168First central cylindrical opening 170Cover element 172Plugs of channels 174Second central cylindrical opening 180First Bearing ring 182 second bearing ring 184 third bearing ring

Claims

1. Cleaning device (100) for cleaning a container, in particular an orbital cleaner, comprising: - a housing (110) with a fluid inlet (112) for admitting a fluid, in particular cleaning agent, - a rotor (120) which can be driven in rotation about a first axis of rotation (122) relative to the housing (110), - a nozzle head (130) with a fluid outlet (132) for dispensing the fluid, in particular cleaning agent, wherein the nozzle head (130) is mounted on the rotor (120) so as to be rotatable about a second axis of rotation (134), - a flow channel (140) for connecting the fluid inlet (112) and the fluid outlet (132) in a fluid-conducting manner, - a passage (142) configured to direct a portion of the flowing fluid to the rotor (120) in order to apply a drive torque and to rotationally drive the rotor (120), and - a drive system (150) coupled on the input side to the rotor (120) and on the output side to the nozzle head (130) and configured to transmit the drive torque of the rotor (120) to the nozzle head (130), characterized in that the rotor (120) or the housing (110) has at least one rolling body (124), wherein the housing (110) or the rotor (120) has at least one rolling surface (116) arranged coaxially with the rotor (120), and the part of the flowing fluid is directed to the rotor (120) in such a way that the rolling body (124) is moved by the fluid along the rolling surface (116).

2. Cleaning device (100) according to claim 1, wherein the rolling surface (116) is formed by an inner wall (114) of the housing (110) that is formed around the first axis of rotation (122) and is particularly rotationally symmetrical, or an outer wall of the rotor (120), extending in the axial direction, wherein the rolling body (124) can be arranged radially inside the rolling surface (116) or radially outside the rolling surface (116).

3. Cleaning device (100) according to claim 1 or 2, wherein the distance of the rolling surface (116) to the first axis of rotation (122) is not constant, so that the rolling surface (116) has at least one first section (116a), in which the distance decreases, and at least one second section (116b), in which the distance increases.

4. Cleaning device (100) according to claim 3, wherein the rotor (120) comprises a plurality of rolling bodies (124), and wherein the rolling surface (116) comprises a plurality of first sections (116a) in which the distance decreases and a plurality of second sections (116b) in which the distance increases, and a first section (116a) is arranged adjacent to a second section (116b).

5. Cleaning device (100) according to one of the preceding claims, wherein the distance of the rolling surface (116) to the first axis of rotation (122) can be described as a function A = sin (α).

6. Cleaning device (100) according to one of the preceding claims, wherein the passage (142) is fluidically connected to a pressure chamber for pressurized fluid, which chamber is formed at least partially by the flow channel (140) and / or at least partially by an interior space of the rotor (120).

7. Cleaning device (100) according to one of the preceding claims, wherein the drive system (150) comprises: - a drive shaft (152) for driving the nozzle head (130), which is arranged coaxially with the second axis of rotation (134) and coupled to the rotor (120) in such a way that the drive shaft (152) is driven with the rotor (120) about the first axis of rotation (122), and - a stationary receiver (154) relative to the first and second axes of rotation (134), wherein the drive shaft (152) engages the stationary receiver (154) such that the drive torque of the rotor (120) is transmitted to the drive shaft (152) and the drive shaft (152) rotates about the second axis of rotation.

8. Cleaning device (100) according to claim 7, wherein the stationary receiver (154) has a stationary bevel gear (158) which is arranged coaxially with the first axis of rotation (122) and is designed to be tapered on the rotor side, and the drive system (150) has a drive bevel gear (156) for torque-transmitting coupling with the stationary bevel gear (158), which is arranged coaxially with the second axis of rotation (134) on the drive shaft (152) and is tapered in the direction of the first axis of rotation (122).

9. Cleaning device (100) according to one of the preceding claims, wherein the flow channel (140) has a first cross-sectional area and the passage (142) has a second cross-sectional area, and the second cross-sectional area is smaller than the first cross-sectional area.

10. Cleaning device according to claim 8, wherein the housing (110) has a cylindrical portion (118) coaxial with the first axis of rotation (122) and forming a portion of the flow channel (140), and wherein the stationary bevel gear (158) is formed at a rotor-side end of the cylindrical portion (118).

11. a cleaning device (100) according to one of the preceding claims, wherein the cleaning device further comprises a cage (160) for guiding the rolling body (124) in the radial direction, which is associated with the rotor (120) and arranged coaxially with the first axis of rotation (122), and wherein the cage (160) is configured to rotate with the rolling body (124) about the first axis of rotation (122).

12. Cleaning device (100) according to claim 11, wherein the cage (160) is at least partially received in the housing (110) and the rolling body (124) is guided by the cage (160) such that the rolling body (124) is movable in a radial direction between the cage (160) and the rolling surface (116).

13. Cleaning device (100) according to one of the preceding claims, wherein the cage (160) has a plurality of receiving means (162) which are arranged along an outer circumference of the cage (160) and are configured to at least partially receive and guide a rolling body (124) in the radial direction.

14. Cleaning device (100) according to one of the preceding claims, wherein the rolling bodies (124) are cylindrical and the receiving means (162) are each partially cylindrical corresponding to the rolling bodies (124).

15. Cleaning device (100) according to one of the preceding claims, wherein the receiving means (162) each have an opening (166) facing away from the housing (110), which opening is connectable to the passage (142) in a fluid-conducting manner.

16. Cleaning device (100) according to claim 15, wherein the cleaning device further comprises a cover element (170) associated with the rotor (120) and configured to close the openings (166), and wherein the cover element (170) has a plurality of channels that are fluidically connectable to the passage (142).

17. A method for driving a cleaning device (100) according to any of the foregoing claims, wherein the method comprises the steps of: introducing a fluid, in particular cleaning agent, into the housing (110), - directing part of the flowing fluid to the rotor (120) in such a way that the rolling body (124) is moved by the fluid along the rolling surface (116), - driving the rotor (120) by the part of the flowing fluid around the first axis of rotation (122) relative to the housing (110), providing the drive system (150), which is coupled on the drive side to the rotor (120) and on the output side to the nozzle head (130), transmitting the torque of the rotor (120) to the nozzle head (130) by means of the drive system (150), and - dispensing the fluid through the fluid outlet (132) of the nozzle head (130).