Cleaning Equipment

Abstract

The present invention relates to a cleaning device (1, 100) connectable to a hydraulic source and housed in a first housing part (2, 200), comprising a hollow input shaft (3, 300) having a fluid channel (31, 301) with at least one lateral or axial input (32, 302) and at least one lateral output (33, 303), and a second housing part (4, 400) in fluid communication with the hollow input shaft (3, 300). and at least one hollow output shaft (6, 600) having a fluid channel (31, 301) with at least one lateral input portion (62, 602) and at least one lateral or axial output portion (63, 603), the hollow input shaft (3, 300) and / or the hollow output shaft (6, 600) being rotatably mounted about its longitudinal axis relative to the respective housing portion (2, 200, 4, 400). At least a first chamber (51, 71, 501, 701) is provided between the input section (32, 302) or the output section (33, 303) of the hollow input shaft (3, 300) or the input section (62, 602) of at least one hollow output shaft (6, 600) and an inner jacket (53, 73, 503, 703) of the sealing sleeve (5, 7, 500, 700), and the sealing sleeve (5, 7, 500, 700) is provided on the respective housing section (2, 200, 4, 400). and is rotatably mounted at and is arranged to surround a portion of the hollow input shaft (3, 300) or the hollow output shaft (6, 600), and a region of the inner jacket (53, 73, 503, 703) of the sealing sleeve (5, 7, 500, 700) extending axially from the first chamber (51, 71, 501, 701) forms a gap seal (12) with the outer jacket of the hollow input shaft (3, 300) or the hollow output shaft (6, 600).

Description

[Technical field]

[0001] The present invention relates to a cleaning device according to the preamble of claim 1 . [Background technology]

[0002] Such cleaning devices are known from the prior art and have a pressure of 1800 bar (1835 Kgf / cm 2 ) and typically has a hollow input shaft and one or more hollow output shafts fluidly connected to the hollow input shaft. A pressure chamber, which is filled during operation with liquid under high pressure and is provided between the output of the hollow input shaft and the input of the hollow output shaft, is sealed inside the housing via a sealing element molded from soft plastic or rubber.

[0003] The sealing elements are here arranged in such a way that the liquid under high pressure is pressed against the sealing elements themselves and also against the axial end face of the input shaft, the axial forces thus acting on the input shaft being absorbed by the axial bearing between the input shaft and the housing surrounding it.

[0004] The force acting on the sealing element results in the sealing element being pressed into a gap provided between the output shaft and the housing, which allows a rotational movement of the output shaft relative to the housing. On the one hand, the pressing of a part of the sealing element into this gap leads to undesirable friction between the output shaft and the housing. On the other hand, this leads to accelerated wear of the sealing element.

[0005] The object of the present invention is to provide a cleaning device which is able to remedy the above mentioned drawbacks and in particular to reduce or avoid entirely the axial forces on the input shaft caused by the hydraulic pressure. The object of the invention is achieved by a cleaning device having the features of claim 1. Summary of the Invention [Means for solving the problem]

[0006] The cleaning device of the present invention has a hollow input shaft connectable to a hydraulic source, housed in a first housing part, having a fluid channel, at least one lateral or axial input portion and at least one lateral output portion.

[0007] The cleaning device further has at least one hollow output shaft fluidly coupled to the hollow input shaft, the hollow output shaft being housed in the second housing portion, having a fluid channel, and having at least one lateral input portion and at least one lateral or axial output portion. The hollow input shaft and / or hollow output shaft are rotatably mounted relative to the respective housing portion about their longitudinal axes.

[0008] A first chamber is provided at least between at least the input or output portion of the hollow input shaft or the input portion of the at least one hollow output shaft and the inner jacket of the sealing sleeve. A sealing sleeve is positioned and rotatably mounted on each housing portion and surrounds a portion of the hollow input shaft or the hollow output shaft. A region of the inner jacket of the sealing sleeve extending axially from the first chamber forms a gap seal with the outer jacket of the hollow input shaft or the hollow output shaft.

[0009] The configuration of the transition region via a sealing sleeve with a first chamber arranged in the region of the inner jacket, in particular the surfaces of the input or output shaft aligned perpendicular to the longitudinal axis of the input or output shaft, prevents liquid under high pressure from reaching the region of the housing, so that no axial forces are generated even if fluid escapes under high pressure into the hollow input or output shaft. The end faces of the hollow input or output shaft transverse to the longitudinal extension are therefore no longer subjected to pressurized fluid, so that an axial attachment of the hollow input or output shaft is no longer necessary or can at least be configured to be significantly smaller.

[0010] A further advantage of the sealing sleeve arrangement is that possible sealing elements cannot be forced into the gap forming the gap seal between the housing and the hollow input shaft or hollow output shaft even under high pressure loads, since premature wear of the seal and the friction caused by the seal are avoided by the use of such a sealing sleeve. Variations of the advantageous embodiments of the invention are the subject matter of the dependent claims.

[0011] According to one advantageous embodiment variant of the invention, a second chamber is provided between the outer jacket of the sealing sleeve and the inner surface of the housing part, which second chamber is connected via a connecting channel of the first chamber and extends axially from the connecting channel on both sides to the hollow input shaft or the hollow output shaft.

[0012] Due to the second chamber provided in the outer area of ​​the jacket, these areas of the sealing sleeve are under the same hydraulic pressure as the inner areas of the fluid channels of the hollow input shaft or hollow output shaft, thereby preventing widening of the sealing gap of the gap seal.

[0013] According to a further advantageous embodiment, the first chamber is formed as a material recess on the inner jacket of the sealing sleeve and / or as a material recess on the adjacent jacket surface of the hollow input shaft or the hollow output shaft, respectively. The second chamber is also preferably formed as a material recess on the outer jacket of the sealing sleeve and / or as a material recess on the respective adjacent jacket surfaces of the wall of the housing part.

[0014] According to an alternative advantageous embodiment, the second chamber is formed as a gap defined by a sealing ring, which is mounted in a ring groove in the outer jacket surface of the sealing sleeve. According to a further preferred embodiment of the cleaning device according to the invention, the hollow input shaft is connected to the at least one hollow output shaft via mechanical gears.

[0015] Thus, separate drives for the hollow input shaft and the at least one hollow output shaft are not required. The gap seal preferably forms a fluid bearing. According to a further preferred embodiment variant, the first housing part is mechanically connected to the second housing part.

[0016] According to one preferred embodiment variant, the hollow output shaft is rotatable about a rotation axis perpendicular to the rotation axis of the hollow input shaft, which allows for highly variable arrangement of the cleaning nozzles, particularly with a further preferred embodiment variant in which the output of the hollow output shaft is coupled to a nozzle extending transversely to the longitudinal axis of the hollow output shaft in a nozzle holder.

[0017] According to an alternative embodiment, the at least one hollow output shaft is rotatable about an axis of rotation parallel to the axis of rotation of the hollow input shaft. Such a modification allows for a large area cleaning, in particular of the surfaces perpendicular to the axis of rotation of the hollow input shaft and the hollow output shaft. The hollow input shaft is connected according to one preferred refinement via a gearing having at least two hollow output shafts arranged parallel to one another.

[0018] According to a further preferred refinement of the cleaning device according to the invention, the second chamber of the sealing sleeve partially surrounding the hollow output shaft is fluidly connected to a nozzle fixed in the second housing part. The sealing sleeve is preferably manufactured from a bearing metal, preferably bronze. [Brief description of the drawings]

[0019] A modified preferred embodiment of the present invention will now be described in more detail with reference to the accompanying drawings. [Figure 1] FIG. 2 is a perspective view of a modified example of the first embodiment of the cleaning device according to the present invention. [Diagram 2] FIG. 2 is a perspective view of a modified example of the first embodiment of the cleaning device according to the present invention. [Diagram 3] 3 shows a cross-sectional view of the cleaning device shown in FIGS. 1 and 2. FIG. [Figure 4] 1 shows a perspective view of a variant of an alternative embodiment of a cleaning device according to the present invention; [Diagram 5] 5 shows a cross section through the cleaning device according to FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In the following description of the figures, the terms upper, lower, left, right, front, rear, etc. relate solely to the illustration and location of the cleaning device, hollow input shaft, hollow output shaft, input, output, sealing sleeve, etc., selected as examples in the respective figures. These terms should not be understood as limiting, i.e., these references may vary for different working positions or mirror symmetrical configurations, etc.

[0021] A first embodiment of a cleaning device according to the invention is shown in figures 1 to 3. The cleaning device is identified here as a whole by the reference number 1. Such a cleaning device 1 is used, for example, for cleaning the inside of a tank container.

[0022] The cleaning device 1, as shown in Figures 1 to 3, has a hollow input shaft 3 connectable to a hydraulic source, which is housed in a first housing part 2 and has a central fluid channel 31 for conducting liquid under high pressure up to about 1800 bar.

[0023] A liquid, for example a water / detergent mixture, enters the fluid channel 31 through an axial input 32 in the variant of the embodiment shown here. It is also conceivable to provide an input arranged laterally at an angle to the longitudinal axis of the hollow input shaft 3, for example based on the second embodiment of the inventive cleaning device 100 shown in figures 4 and 5.

[0024] The hollow input shaft 3 further has a number of lateral outputs 33. In a variation of the embodiment shown here, the lateral outputs 33 extend radially outwardly away from the fluid channel 31 through the wall of the hollow input shaft 3 and open into a first chamber 51 of a sealing sleeve 5 that surrounds the region of the hollow input shaft 3 having the outputs 33.

[0025] The sealing sleeve 5 is housed within the second housing part 4, as further seen in FIG. 3, the inner wall of which together with an outer jacket 54 of the sealing sleeve 5 defines a second chamber 52. The inner jacket 53 of the sealing sleeve 5 forms a gap seal 12 with the hollow input shaft 3 to allow rotational movement of the sealing sleeve 5 relative to the hollow input shaft 3 .

[0026] In the embodiment variant shown here, a housing part 4 is rotatably mounted about the central longitudinal axis of a hollow input shaft 3 . The first chamber 51 of the sealing sleeve 5 is formed as a recess in a ring-shaped material of the inner jacket 53 of the sealing sleeve 5 and has an axial width which corresponds approximately to the diameter of a channel 55 extending radially through the jacket of the sealing sleeve 5 and which opens into the second chamber 52.

[0027] The second chamber 52 is formed in the outer jacket 54 of the sealing sleeve 5 and is preferably formed as a recess in a ring-shaped material in the outer jacket 54 of the sealing sleeve 5, which recess forms a closed ring space together with the wall of the housing part 4 enclosing the recess. It is also conceivable to form the first and / or second chambers 51, 52 and provide recesses in the ring-shaped material, not only on the inner jacket 53 and / or the outer jacket 54 of the sealing sleeve 5, but also (similarly) on the respective adjacent jacket surfaces of the hollow input shaft 3 or on the wall of the housing part 4.

[0028] It is also conceivable to form the second chamber 52 without providing a recess of a ring-shaped material as described above, but rather as a gap separated by a sealing ring 56, which is provided in a groove around the surface of the outer jacket 54 of the sealing sleeve 5, as illustrated in FIG. 3.

[0029] The width of this ring space, seen in the axial direction relative to the hollow input shaft 3 , is preferably greater than the width of the first chamber 51 , which is also formed as a ring space and lies on the inner jacket of the sealing sleeve 5 . The channel 55 or several channels 55 open into the second chamber 52 axially relative to the hollow input shaft 3 .

[0030] In operation, liquid under high pressure fills the chambers 51 , 52 and thus creates a pressure equilibrium between the inner jacket 53 and the outer jacket 54 of the sealing sleeve 5 in the region of the second chamber 52 . The fluid pressure here acts on the surface of the sealing sleeve 5 which forms the inner jacket 53 of the sealing sleeve 5 and therefore on the gap seal 12 along which the pressure is dissipated.

[0031] Viewed axially relative to the hollow input shaft 3, the surface of the outer jacket 54 of the sealing sleeve 5 is provided on the outside of the second chamber 52 with a ring groove, which is used to accommodate a seal ring 56 which seals the sealing sleeve 5 against the inner wall of the second housing part 4. Furthermore, a connecting channel 41 for conducting fluid under high pressure in the direction of the hollow output shaft 6 is introduced into the second housing part 4 .

[0032] This connecting channel 41 opens on the one hand into a second chamber 52 of the sealing sleeve 5 which is fluidly connected to the first chamber 51 and at the other end into a further second chamber 72 which is fluidly connected to a further first chamber 71 of a further sealing sleeve 7.

[0033] A sealing sleeve 7 , which corresponds in its structure and function to the sealing sleeve 5 , surrounds a partial region of the hollow output shaft 6 which is arranged in the second housing part 4 so as to be rotatable relative to the sealing sleeve 7 . The hollow output shaft 6 is accommodated in the second housing part 4 so as to be rotatable about a rotation axis perpendicular to the rotation axis of the hollow input shaft 3 .

[0034] The hollow input shaft 3 is connected to a hollow output shaft 6 via mechanical gearing. For this purpose, in a variant of the first embodiment of the cleaning device 1 shown in Figures 1 to 3, a gear element 22, e.g. a crown wheel or friction wheel, is fixed on the end face of the housing wall 21 of the housing part 2 remote from the input part 32, and the gear element 22 has an operational connection with a corresponding second gear element 8, e.g. a gear wheel fastened on the hollow output shaft 6.

[0035] A nozzle holder 9 is arranged on the end of the hollow output shaft 6 opposite the second gear element 8 . Nozzle holder 9 , in the exemplary embodiment, has a plurality of nozzles 91 that extend outwardly from nozzle holder 9 transversely to the longitudinal axis of hollow output shaft 6 .

[0036] As can be seen further from Figures 1 to 3, it is also conceivable to arrange a further nozzle 13 on the end face of the second housing part 4 inclined at an angle, the nozzle 13 being fluidly connected via a connecting channel to a second chamber 72 of the sealing sleeve 7 partially surrounding the hollow output shaft 6.

[0037] In the alternative embodiment variant of the cleaning device 100 according to the invention shown in Figures 4 and 5, in contrast to the cleaning device 1, two hollow output shafts 600 are mounted and fluidly connected to one hollow input shaft 300. The hollow input shaft 300 has here a lateral input section 302 which is connected to a pressure adjustment section 205 provided in the first housing part 200. The hollow input shaft 300 is mounted rotatably relative to the housing part 200 about its longitudinal axis.

[0038] In the region of the input 302, the hollow input shaft 300 is surrounded by a sealing sleeve 500, corresponding to the first exemplary embodiment described above, the sealing sleeve 500 having a first chamber 501 fluidly coupled to the input 302 of the hollow input shaft 300. The first chamber 501 is also connected externally via a connecting channel 505 to a second chamber 502 which extends axially relative to the hollow input shaft 300 .

[0039] In the region of the second end of the channel 301 of the hollow input shaft 300, the channel 301 splits into two laterally extending channels 304 which open into respective connecting channels 411, 421 of the first wing 410 and the second wing 420 of the second housing part 400. Respective sealing sleeves 700 are arranged at the ends of these connecting channels 411 , 421 in the second housing part 400 surrounding the input area of ​​the respective hollow output shaft 600 .

[0040] The sealing sleeve 500, 700 also corresponds in principle in its construction and function to the sealing sleeve 5 described on the basis of the first exemplary embodiment. The hollow output shaft 600 is in this embodiment variant rotatably mounted parallel to the axis of rotation of the hollow input shaft 300. For this purpose, the hollow input shaft 300 is connected via two gear trains 800 to two hollow output shafts 600 arranged parallel to one another.

[0041] Each of the gear arrangements 800 in the exemplary embodiment shown here has a first gear wheel 801 surrounding the hollow output shaft 600 and a second gear wheel 802 that meshes with a gear wheel 204 fastened onto the hollow input shaft 300. The output section 603 of the hollow output shaft 600 is now axially aligned with the longitudinal channel 601 of the hollow output shaft 600. Each nozzle 604 is connected to the output section 603.

[0042] The gap seal 12 forms a fluid bearing. Furthermore, during operation of the cleaning device 1, 100, internal fluid pressure acting in the axial direction is significantly reduced and in particular completely prevented. [Explanation of symbols]

[0043] List of symbols 1 Cleaning equipment 2 First housing part 21 Housing Wall 22 Gear elements 3 Hollow input shaft 31 Channels 32 Input section 33 Output section 4 Second housing part 41 Connection Channels 5 Sealing sleeve 51 Room 1 52 Second Room 53 Inner jacket 54 Outer jacket 55 Connection Channels 56 Seal ring 6 Hollow output shaft 61 Channels 62 Input section 63 Output section 7 Seal sleeve 71 Room 1 72 Second Room 73 Inner jacket 74 Outer jacket 75 Connection Channels 76 Seal Ring 8 Gear Elements 9 Nozzle holder 91 Nozzle 11 Outer jacket 12 Gap Seal 100 Cleaning equipment 200 First housing part 201 Fastening flange 202 First housing part 203 Second housing section 204 Gear Wheel 205 Press-fit adjustment part 300 hollow input shaft 301 Channel 302 Input section 303 Output section 304 Route 400 Second housing part 410 First Wing 411 Connection Channel 420 Second Wing 421 Connection Channel 500 Sealing Sleeve 501 Room 1 502 Second Room 503 Inner jacket 504 Outer jacket 506 Seal Ring 600 hollow output shaft 601 Channel 602 Input section 603 Output section 604 Nozzle 700 Sealing Sleeve 701 Room 1 702 Second Room 703 Inner jacket 704 Outer jacket 706 Seal Ring 800 Gears 801 1st Gear Wheel 802 Second Gear Wheel

Claims

1. A cleaning device (1, 100), comprising: a hollow input shaft (3, 300) connectable to a hydraulic source and housed in a first housing part (2, 200), the hollow input shaft (3, 300) having a fluid channel (31, 301) with at least one lateral or axial input part (32, 302) and at least one lateral output part (33, 303); at least one hollow output shaft (6, 600) in fluid communication with said hollow input shaft (3, 300) and housed in a second housing part (4, 400), said output shaft (6, 600) having a fluid channel (31, 301) with at least one lateral input portion (62, 602) and at least one lateral or axial output portion (63, 603); In a cleaning device (1, 100) in which the hollow input shaft (3, 300) and / or the hollow output shaft (6, 600) are rotatably mounted about their longitudinal axis relative to the respective housing parts (2, 200, 4, 400), at least a first chamber (51, 71, 501, 701) is provided between the input section (32, 302) or the output section (33, 303) of the hollow input shaft (3, 300) or the input section (62, 602) of at least one hollow output shaft (6, 600) and an inner jacket (53, 73, 503, 703) of a sealing sleeve (5, 7, 500, 700); the sealing sleeve (5, 7, 500, 700) is positioned and rotatably mounted on the respective housing part (2, 200, 4, 400) and arranged to surround a portion of the hollow input shaft (3, 300) or the hollow output shaft (6, 600); a region of the inner jacket (53, 73, 503, 703) of the sealing sleeve (5, 7, 500, 700) extending axially from the first chamber (51, 71, 501, 701) forms a gap seal (12) with an outer jacket of the hollow input shaft (3, 300) or the hollow output shaft (6, 600); A cleaning device (1, 100) characterized in that a second chamber (52, 72, 502, 702) is arranged between an outer jacket (54, 74, 504, 704) of the sealing sleeve (5, 7, 500, 700) and an inner surface of the housing part (2, 200, 4, 400), the second chamber (52, 72, 502, 702) being connected to the first chamber (51, 71, 501, 701) via a connecting channel (55, 75) and extending from the connecting channel (55, 75) on both sides in an axial direction relative to the hollow input shaft (3, 300) or the hollow output shaft (6, 600).

2. 2. The cleaning device (1, 100) according to claim 1, wherein the first chamber (51, 71, 501, 701) is formed as a recess on the inner jacket (53, 73, 503, 703) of the sealing sleeve (5, 7, 500, 700) or as a recess on a jacket surface adjacent to the hollow input shaft (3, 300) or the hollow output shaft (6, 600), respectively.

3. 2. The cleaning device (1, 100) of claim 1, wherein the second chamber (52, 72, 502, 702) is formed as a recess on the outer jacket (54, 74, 504, 704) of the sealing sleeve (5, 7, 500, 700) and / or as a recess on a jacket surface respectively adjacent to a wall of the housing part (4, 200, 400).

4. 3. The cleaning device (1, 100) of claim 1 or 2, wherein the second chamber (52, 72, 502, 702) is formed as a gap defined by a sealing ring (56, 76, 506, 706), the sealing ring (56, 76, 506, 706) being provided in a ring groove on the surface of the outer jacket (54, 74, 504, 704) of the sealing sleeve (5, 7, 500, 700).

5. 4. The cleaning device (1, 100) according to claim 1 or 3, wherein the inner diameter of the sealing sleeve (5, 7, 500, 700) in the region of the gap seal (12) is equal or approximately equal on both sides of the connecting channel (55, 75).

6. 6. The cleaning device (1, 100) according to any one of the preceding claims, wherein the hollow input shaft (3, 300) is connected to at least one hollow output shaft (6, 600) via a mechanical gear (8, 800).

7. The cleaning device (1, 100) according to any of the preceding claims, wherein the gap seal (12) forms a fluid bearing.

8. 8. The cleaning device (1, 100) according to any one of the preceding claims, wherein the hollow output shaft (6) rotates about an axis of rotation perpendicular to the axis of rotation of the first housing part (2).

9. 8. The cleaning device (1, 100) according to any of the preceding claims, wherein said at least one hollow output shaft (600) is rotatable about an axis of rotation parallel to an axis of rotation of said first housing part (200).

10. 10. The cleaning device (1, 100) according to any one of the preceding claims, wherein the output (63) of the hollow output shaft (6) is connected to a nozzle holder (9) and the nozzles (91) extend transversely to the longitudinal axis of the hollow output shaft (6).

11. 11. A cleaning device (1, 100) as claimed in any one of the preceding claims, wherein a second chamber (72) of a sealing sleeve (7) partially surrounding the hollow output shaft (6) is fluidly connected to a nozzle (13) fixed to the second housing part (4).

12. 12. The cleaning device (1, 100) according to any one of the preceding claims, wherein the sealing sleeve (7) is manufactured from a bearing metal comprising bronze.

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