EP3265235A1

EP3265235A1 - Rotary nozzle for a high-pressure cleaning device

Info

Publication number: EP3265235A1
Application number: EP15706847.9A
Authority: EP
Inventors: Sven Dirnberger; Björn SCHWARZ; Stefan Werner; Johann Georg Wesch
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2015-03-02
Filing date: 2015-03-02
Publication date: 2018-01-10
Anticipated expiration: 2035-03-02
Also published as: RU2657039C1; JP6505245B2; WO2016138929A1; CN107405636A; EP3265235B1; CN107405636B; AU2015385182B2; ES2717261T3; PL3265235T3; AU2015385182A1; JP2018508350A; MX2017011219A; DK3265235T3; BR112017017295A2; US20170361341A1

Abstract

Disclosed is a rotary nozzle (10) for a high-pressure cleaning device, comprising a housing (12) that has at least one tangentially extending inlet (18) and an outlet (22) which is located on an end wall (24) and on which a pot-shaped, centrally open depression (30) is located, and comprising a nozzle member which is disposed in the housing (12) and has a continuous duct (72) and a spherical end (64) of which is supported in the pot-shaped depression (30); the longitudinal axis (70) of the nozzle member extends at an angle from the longitudinal axis (26) of the housing (12); the nozzle member is made to rotate by the liquid flowing through the housing (12) and is supported on a bearing surface (40) while rotating; a plurality of flow resistance elements, each of which has an impact surface (52; 20), is arranged on the wall of the housing (12), downstream of the bearing surface (40). In order to be able to effectively limit the rotational speed of the nozzle member (62) without notably affecting the beginning of the rotating movement of the nozzle member (62), a guiding surface (54; 122) is located upstream of each impact surface (52; 120) in relation to the direction in which the liquid flows, the impact surface (52; 120) adjoins said guiding surface (54; 122) without interruption, and the guiding surface (54; 122) runs at an angle from the radial plane of the housing (12).

Description

ORDER FOR A HIGH-PRESSURE CLEANER

The invention relates to a rotor nozzle for a high - pressure cleaning appliance having a housing which has at least one inlet tangentially opening into the housing and an outlet arranged on an end wall of the housing, on which a bearing with a pan - shaped, centrally perforated recess is arranged, and with a Housing arranged, having a passageway and having a spherical end in the cup-shaped recess supporting nozzle body whose longitudinal axis is inclined to the longitudinal axis of the housing and is offset by the liquid flowing through the housing in a circulating movement, wherein the longitudinal axis of the nozzle body on a conical surface rotates and the nozzle body is supported with a contact surface at its periphery on a support surface, wherein downstream of the support surface on the wall of the housing a plurality of flow resistance elements are arranged in the circumferential direction at a distance from each other, each having a projecting into the interior impact surface for the impact of liquid.

With the aid of such a rotor nozzle, a compact liquid jet revolving on a conical surface can be produced which, for example, can be directed onto a surface for cleaning purposes. The inlet of the housing may be supplied with liquid under pressure from a high-pressure cleaner. In the housing is a nozzle body, which is mounted only on one side of the pan-shaped recess and can move in the housing about the longitudinal axis of the housing, moreover. The nozzle body has a passageway through which the liquid can pass through the perforated recess of the housing. The longitudinal axis of the nozzle body is inclined relative to the longitudinal axis of the housing. By virtue of the liquid entering tangentially into the housing, the nozzle body is pressed into the cup-shaped depression, which forms a bearing for the nozzle body, and at the same time the nozzle body is rotated about the housing longitudinal axis. offset axis. This has the consequence that the exiting liquid jet also describes the desired circular movement, so that when a comparable pressure with dot jet nozzles a relatively large area can be acted upon with liquid.

The supply of the pressurized fluid over the tangentially into the housing opening inlet ensures that fluid in the housing is rotated about the longitudinal axis of the housing and thereby rotates the nozzle body to the housing longitudinal axis by within the housing a rotating liquid column formed.

If the nozzle body has a very high rotational speed about the longitudinal axis of the housing, this can result in the liquid jet emerging from the outlet fanning out and thereby reducing the cleaning effect of the liquid jet occurring on a surface. In DE 44 19 404 AI is therefore proposed to arrange on the inner wall of the housing a plurality of distributed over the circumference arranged flow resistance elements, which slow the flow of the liquid and thereby reduce the speed of the nozzle body. The flow resistance elements are formed by fins, which are arranged at the upstream end of an insert insertable into the housing. The insert part is displaceable in the longitudinal direction of the housing and has at its upstream end a multiplicity of slot recesses which form the lamellae between them. The lamellae each form a baffle surface for the liquid flowing around, wherein the baffle surface is directed opposite to the liquid.

The rotational speed which the nozzle body has in its rotation about the housing longitudinal axis is indirectly reduced by the flow resistance elements arranged on the inside of the housing in that the flow resistance elements act on the circulating liquid in a slower manner. It is desirable to limit the speed of the nozzle body as effectively as possible during its rotational movement about the housing longitudinal axis. However, care must also be taken that the so-called "start-up behavior" of the nozzle body is not impaired. The startup behavior is understood to mean the start of the rotation of the nozzle body about the housing longitudinal axis. Before the housing is supplied under pressure fluid, the nozzle body is relative to the housing at rest, so he does not perform any circulation movement around the housing longitudinal axis. If pressurized fluid is now supplied via the at least one tangential inlet, then the nozzle body must reliably be set in rotation. If the nozzle body then carries out the rotational movement, then the rotational speed of the nozzle body should not exceed a maximum rotational speed in order to avoid fanning of the liquid jet emerging from the outlet.

Object of the present invention is therefore to develop a rotor nozzle of the type mentioned in such a way that the speed which has the nozzle body in its rotational movement about the housing longitudinal axis, can be effectively limited without the startup behavior of the nozzle body is significantly affected.

This object is achieved in a rotor nozzle of the generic type according to the invention in that each baffle surface, based on the flow direction of the liquid immediately upstream a guide surface to which the baffle surface connects continuously, wherein the guide surface oriented obliquely to a radial plane with respect to the longitudinal axis of the housing is.

In the case of the rotor nozzle according to the invention, each baffle surface is preceded by a guide surface, to which the respective baffle surface continuously adjoins in the flow direction of the liquid. The baffles are oriented obliquely to a radial plane with respect to the longitudinal axis of the housing. The oblique orientation of the guide surfaces has the consequence that circulating liquid is supplied along the guide surfaces to the baffles, which counteract the circulation movement of the liquid. As a result, a significant slowing of the liquid flow can be achieved, and this in turn has the consequence that the speed that the nozzle body has during its rotational movement about the housing longitudinal axis, can be effectively limited.

The flow resistance elements are arranged downstream of the support surface on which the nozzle body is supported on the inner wall of the housing. In the region between the at least one inlet of the housing and the support surface no flow resistance elements are arranged which could impair the movement of the liquid. This ensures that the start-up behavior of the nozzle body is not noticeably impaired despite the use of the baffle and guide surfaces.

It has been shown that not only the speed can be limited by the use of the baffles and guide surfaces, which has the nozzle body in its orbital movement about the housing longitudinal axis, but it can also be kept low, that is, the rotation of the nozzle body, which has the nozzle body about its own longitudinal axis. The im

Housing rotating liquid has namely not only the consequence that the nozzle body rotates according to the liquid around the housing longitudinal axis. Rather, the nozzle body is driven, in particular in its front region immediately adjacent to the cup-shaped depression, by the circulating liquid to a rotation about the longitudinal axis of the nozzle body. The self-rotation about the longitudinal axis of the nozzle body is superimposed on the orbital motion of the nozzle body on the conical surface of the housing. The self-rotation has the consequence that the fluid jet flowing out of the nozzle body also gets into rotation about its longitudinal axis. This leads to an additional fanning of the liquid jet, which impairs its cleaning effect. The positioning of the baffle and baffle surfaces downstream of the support surface against which the nozzle body rests against the wall of the housing results in a slowing down of the orbital motion of the liquid jet, particularly in the region of the nozzle body, in which the nozzle body is excited by the liquid jet to self-rotation. It can therefore be limited by the use of the baffles and fins not only the speed of the nozzle body in its orbital motion to the Housing longitudinal axis, but it can also be limited to the speed of self-rotation of the nozzle body.

As already mentioned, the baffles counteract the circulation movement of the liquid. Preferably, the baffles are at least partially disposed in a radial plane relative to the longitudinal axis of the housing. The circulating around the housing longitudinal axis liquid can thereby impinge perpendicular to the baffle at least in a region of the baffle and thereby experience a particularly strong deceleration.

It is particularly advantageous if the guide surfaces are arcuately curved at least in certain regions. For example, it can be provided that the guide surfaces are convexly curved at least in regions outwards, that is, in the direction away from the longitudinal axis of the housing. The arcuate curvature leads to a particularly effective flow change of the liquid in the direction of the baffle surface immediately following the respective guide surface.

Each guide surface, in combination with the baffle surface adjoining the guide surface, favorably forms a channel-shaped widening of the interior of the housing. The channel-shaped extension extends in the direction of the outlet of the housing. Preferably, the channel-shaped extension is aligned obliquely to the longitudinal axis of the housing, in particular parallel to the longitudinal axis of the nozzle body.

It is particularly favorable if a large number of impact and guide surfaces are arranged alternately behind one another in relation to the flow direction of the liquid. In the circumferential direction of the housing, the impact and guide surfaces thus adjoin one another, with each guide surface following a baffle surface, which in turn is followed by a guide surface.

In an advantageous embodiment of the invention, each guide surface forms in combination with the adjacent to the guide surface baffle in one oriented perpendicular to the longitudinal axis of the housing level of an S-shaped or sawtooth contour. It has been shown that this is a particularly effective slowdown of the liquid flow in one

Area between the support surface on which the nozzle body is supported, and the outlet of the housing can be achieved.

The baffle extends in the circumferential direction of the housing conveniently over a larger area than the adjoining baffle.

It is particularly favorable if the guide surface extends in the circumferential direction over an area that is at least twice as large as the impact surface following the guide surface. The liquid is thereby supplied over a relatively large peripheral region in each case a baffle and then effectively braked at this.

It can be provided that the flow resistance elements are formed in a wall of the housing. The flow resistance elements form in such a configuration together with the housing of a one-piece component. For example, it can be provided that the flow resistance elements in combination with the housing form a one-piece injection-molded part, which is preferably made of a plastic material.

Alternatively it can be provided that the flow resistance elements are formed by an insertable into the housing insert. Such a configuration has the advantage that the housing may be formed relatively thin-walled, wherein it may have on its inside a relatively smooth surface without profiling. The risk of cracks forming in the housing when the housing is subjected to high-pressure liquid can thus be kept to a minimum. The insert can form a prefabricated unit that can be inserted into the housing. The insert thus forms an additional component that provides the flow resistance elements, without thereby affecting the mechanical strength of the housing. It is particularly advantageous if the insert part has a constant wall thickness along its circumference. This facilitates the shaping of the insert part in an injection molding process. The insert part has in such a configuration on its outer side a contour corresponding to the inside contour of the insert part.

In an advantageous embodiment, the insert is rotatably connected to the housing and immovable axially connected. The insert leads in such a configuration, in spite of its braking action, which it exerts on the circulating liquid, neither a rotational movement nor an axial movement relative to the housing. Such relative movements could lead to damage of the insert part and / or the housing. The provision of a rotationally fixed and axially immovable connection between the insert part and the housing thus allows a longer life of the rotor nozzle.

Preferably, the insert is screwed to the housing and it has a stop surface, which rests in the end position of the insert on an inner shoulder of the housing. The insert can be screwed so far into the housing in such an embodiment of the invention until it rests with its stop surface on an inner shoulder of the housing. A further rotational or axial movement of the insert relative to the housing is then no longer possible.

Conveniently, the insert part comprises an external thread which cooperates with a first internal thread of the housing.

The external thread of the insert is conveniently located downstream of the flow resistance elements. For this purpose, the housing has, upstream of the cup-shaped depression, a complementary internal thread to the external thread of the insert part.

Conveniently, the screwing of the insert is identical to the circulation movement of the liquid within the housing. The in the case circulating liquid thus pushes the insert in the end position in which the insert rests with its stop surface on the inner shoulder of the housing. The circulating liquid thus ensures that the screw connection between the insert part and the housing can not be accidentally released.

The internal thread of the housing is preferably designed to be more continuous. This has the advantage that the insert part for producing a stable screw connection has to be twisted only slightly relative to the multiple thread. For example, it can be provided that the insert part has to be rotated by less than 360 ° relative to the housing in order to reach its end position.

As already mentioned, pressurized fluid is supplied to the inlet of the housing during use of the rotor nozzle. For this purpose, the rotor nozzle can have a connection part which can be connected to the housing for connection to a liquid supply line.

Preferably, the connection part is rotatably connected to the housing.

The connector advantageously has an external thread which can be screwed into a second internal thread of the housing.

In an advantageous embodiment, the direction of rotation of the second internal thread coincides with the direction of rotation of the first internal thread. A matching direction of rotation of the two internal threads facilitates the shaping of the housing and allows a particularly cost-effective production.

However, it can also be provided that the direction of rotation of the second internal thread is opposite to the direction of rotation of the first internal thread. As mentioned, it is favorable if the screwing-in direction of the insert part corresponds to the circulating movement of the liquid within the housing. The Insert is thereby pressed by the liquid in its end position. So that the reaction force of the housing does not lead to a relaxation of the

Threaded connection between the housing and the connector leads, the direction of rotation of the second internal thread is favorably opposite to the direction of rotation of the first internal thread.

The following description of two advantageous embodiments of the invention is used in conjunction with the drawings for further explanation. Show it :

Figure 1 is a longitudinal sectional view of a first advantageous embodiment of a rotor nozzle according to the invention with a housing in which an insert part and a nozzle body are arranged;

Figure 2: a longitudinal sectional view of a housing cover of the rotor nozzle

FIG. 1;

Figure 3 is a side view of the insert part of the rotor nozzle of Figure 1;

Figure 4 is a sectional view of the insert along the line 4-4 in Figure 3;

Figure 5: a sectional view of a housing cover of a second advantageous

Embodiment of a rotor nozzle according to the invention and

FIG. 6 shows a sectional view of the housing cover along the line 6-6 in FIG. 5.

In the figures 1 to 4, a first advantageous embodiment of a rotor nozzle according to the invention is shown schematically, the total with the

Reference numeral 10 is occupied. The rotor nozzle 10 has a housing 12 with a housing bottom 14 and a housing cover 16. The housing bottom 14 is disk-shaped and has a plurality of tangential inlets 18, which open into an interior 20 of the housing 12. The interior 20 is surrounded by the housing cover 16 and tapers off from the tan- gentialen inlet 18 to an outlet 22 which is arranged on an end wall 24 of the housing cover 16.

Via the tangential inlets 18, pressurized fluid can be supplied to the interior space 20, which can be rotated in the interior space 20 about a housing longitudinal axis 26 and out of the housing 12 via the outlet 22.

Immediately upstream of the outlet 22, a bearing is arranged in the interior 20 in the form of a bearing ring 28 which forms a pan-shaped recess 30. The bearing ring 28 carries on its outer side a sealing ring 32 and is thereby sealed from the housing cover 16.

Upstream of the bearing ring 28, the housing cover 16 has a first internal thread 34, which is designed to be more continuous. In the illustrated embodiment, the first internal thread 34 is formed zweigängig.

Upstream of the first internal thread 34 of the housing cover 16 forms an inner shoulder 36 and upstream of the inner shoulder 36, the housing cover 16 in the form of a conical bearing portion 38 is configured. Upstream of the conical bearing region 38, the housing cover 16 forms a smooth support surface 40 without any profiling, which is conical in the illustrated embodiment. Facing away from the outlet 22, the housing cover 16 at a distance from the support surface 40, a second inner shoulder 42 on which the housing bottom 14 abuts.

Facing away from the outlet 22, the housing cover 16 at a distance from the second inner shoulder 42, a second internal thread 44, the direction of rotation in the illustrated embodiment with the first internal thread 34 matches. Alternatively, the direction of rotation of the second internal thread 44 may be opposite to the direction of rotation of the first internal thread 34.

In the housing cover 16, an insert member 46 is screwed, which is shown schematically in Figures 3 and 4. The insert 46 has a External thread 48, which can be screwed to the first internal thread 34 of the housing cover 16. Upstream of the external thread 48, the insert member 46 forms a plurality of circumferentially uniformly distributed flow resistance elements 50, each having a baffle 52. Each baffle 52 is upstream of a guide surface 54 in relation to the direction of flow of the liquid. The baffles and guide surfaces 52, 54 are arranged alternately in the circumferential direction of the insert member 46 and continuously merge into one another. In a plane oriented perpendicular to the housing longitudinal axis 26, the baffle and guide surfaces in the illustrated embodiment form an S-shaped contour by both the baffles 52 and the guide surfaces 54 are curved arcuately. The baffles 52 have an end portion 56 oriented in a radial plane with respect to the housing longitudinal axis 26. This becomes clear from FIG. Each baffle 54, in combination with the adjoining baffle 52, forms a channel-shaped extension 55 which is oriented obliquely to the longitudinal axis 26 of the housing 12.

In the circumferential direction, the insert member 46 in the region of the baffle and guide surfaces 52, 54 a constant material thickness. This facilitates the manufacture of the insert 46 in an injection molding process.

The insert 46 extends from the first internal thread 34 of the housing cover 16 to an upstream edge 58 of the conical abutment portion 38, so that the support surface 40 is not affected by the insert 46.

In the transition region between the external thread 48 and the flow resistance elements 50, the insert part 46 forms a stop surface 60 on the outside, and the insert part 46 can be screwed with its external thread 48 so far into the first internal thread 34 until the stop surface 60 at the first inner shoulder 36 of the housing cover 16 is present. After screwing the insert 46 into the housing cover 16, a nozzle body 62 can be inserted into the interior 20, which is supported with a spherical end 64 in the cup-shaped recess 30 of the bearing ring 28. The nozzle body 62 has a nozzle 66, which forms the crowned end 64, and a nozzle carrier 68, which has a passage 72 extending in the axial direction along a longitudinal axis 70 of the nozzle body 62. In the passage 72, the nozzle 66 is pressed. The nozzle 66 has an aligned with the passageway 72 aligned

Nozzle channel 74 on. In its end region facing away from the nozzle 66, the through-passage 72 widens in stages. In the area of expansion, a centrifugal force-enhancing mass body in the form of a steel ball 76 is held. The steel ball 76 is followed in the passage 72 in the direction of the nozzle 66, a rectifier 78, which has two mutually perpendicular, parallel to the longitudinal axis 70 of the nozzle body 62 extending and the passageway 72 diametrically interspersed walls.

The steel ball 76 can be flowed around in the passage 72 of liquid, so that after it has passed the rectifier 78 and the nozzle 66, it can flow through the bearing ring 28 and the outlet 22 and leave the rotor nozzle 10.

At the level of the rectifier 78, the nozzle carrier 68 has a circumferential circumferential groove in which an O-ring 86 is held against rotation.

Relative to the longitudinal axis 70 of the nozzle body 62, the O-ring 86 protrudes in the radial direction beyond the nozzle carrier 68. It forms a contact surface, with which the nozzle body 62 can be applied to the support surface 40 of the housing cover 16. This becomes clear from FIG.

Relative to the longitudinal axis 70, the nozzle body 62 extends over at least one third of its total length in the area upstream of the insert part, d. H. in the region between the insert part 46 and the housing bottom 14. The channel-shaped extensions 55 are aligned parallel to the longitudinal axis 70 of the nozzle body 62.

The housing 12 of the rotor nozzle 10 is screwed to a connection part 88, via which the housing 12 of a high-pressure cleaning device under pressure liquid can be supplied. For this purpose, the connection part 88 has an external thread 90 which can be screwed into the second internal thread 44 of the housing cover 16.

Liquid supplied via the connection part 88 to the housing 12 passes via the tangential inlets 18 into the interior 20 of the housing 12 and can leave the interior 20 via the through-channel 72, the nozzle channel 74, the bearing ring 28 and the outlet 22. The interior space 20 is filled with liquid during operation of the rotor nozzle 10, which is rotated about the housing longitudinal axis 26 by the liquid flowing in via the tangential inlets 18. It thus forms in the interior 20 a rotating about the housing longitudinal axis 26 liquid column. The rotating liquid column takes with its spherical front end 64 on the bearing ring 28 supporting the nozzle body 62, so that it also rotates about the housing longitudinal axis 26. The nozzle body 62 rests against the circular-cylindrical support surface 40 via the O-ring 86 held non-rotatably on the nozzle body 62. The longitudinal axis 70 of the nozzle body 62 is thus inclined to the housing longitudinal axis 26.

In the region of the insert part 46, the liquid circulating about the housing longitudinal axis 26 experiences a deceleration due to the baffles 52, on which a part of the circulating liquid impinges. Liquid is in each case supplied via the guide surfaces 54 to a baffle surface 52, so that an effective deceleration of the liquid can be achieved. Upstream of the insert 46, however, the liquid undergoes no deceleration. This ensures that the nozzle body 62 is reliably offset from the liquid in rotation about the housing longitudinal axis 26. In this area, the nozzle body 62 is located only on one side of the housing longitudinal axis 26, where against the nozzle body 62 in the region of the insert part 46 and the nozzle 66, the housing longitudinal axis 26 intersects. This becomes clear from FIG. The liquid flowing around the nozzle body 62 could be the nozzle body 62 in the

Area in which it crosses the housing longitudinal axis 26, drive to a self-rotation about the longitudinal axis 70 of the nozzle body 62. However, since the liquid in this area is decelerated by the flow resistance elements 50, the self-rotation of the nozzle body 62 can be kept low. In addition, the provision of the flow resistance elements 50 achieves a limitation of the rotational speed that the nozzle body 62 has during its rotational movement about the housing longitudinal axis 26. The reduction of the self-rotation of the nozzle body 62 and the reduction of the rotational speed of the nozzle body 62 about the housing longitudinal axis 26 ensure that the liquid jet emerging from the housing 12 fans out only imperceptibly. The rotor nozzle 10 is therefore characterized by a particularly large cleaning effect.

The invention is not limited to the use of a prefabricated insert part 46 which is used in addition to the housing cover 16 and the housing bottom 14. FIGS. 5 and 6 schematically show a housing cover 116 of a second advantageous embodiment of a rotor nozzle according to the invention. The housing cover 116 is formed substantially identical to the housing cover 16 described above. It differs from the housing cover 16 in that flow resistance elements 118 are molded directly into the housing cover 16. The flow resistance elements 118 are configured identically to the flow resistances 50 explained above. They each have a baffle surface 120, which is preceded by a guide surface 122. The baffle and baffle surfaces 120, 122 continuously merge into each other and each form a channel-shaped widening 123. In each case one baffle surface 120 and one guide surface 122 form an S-shaped contour in a plane aligned perpendicular to the housing longitudinal axis 124. Alternatively, the baffles and guide surfaces 120, 122 could also form a sawtooth-shaped contour. The guide surfaces 122 lead in the same way as the guide surfaces 54 explained above Each of the following in circumferential movement of the liquid baffle surface 120 to liquid, wherein the liquid is significantly slowed down at the baffle 120.

The housing cover 116 is used as an alternative to the housing cover 16. Also in the housing cover 116, the housing bottom 14 can be used, and the housing cover 116 can be screwed to the connection part 88. For this purpose, the housing cover 116 also has an internal thread 128 at its end region facing away from the outlet 126.

In the same way as in the housing cover 16 described above, the nozzle body 62 can also be used in the housing cover 116, which is driven by the housing longitudinal axis 124 rotating liquid to rotate about the housing longitudinal axis 124, wherein the rotational speed of the nozzle body 62 by providing the Flow resistance elements 118 can be effectively limited. In addition, the self-rotation of the nozzle body 62 can be limited by the use of the flow resistance elements 118, but without its start-up behavior is impaired.

Claims

P A T E N T A N S P R E C H E

A rotor nozzle for a high-pressure cleaning device having a housing (12) which has at least one tangentially opening inlet (18) and an outlet (22) arranged on an end wall (24) of the housing (12), on which a bearing with a pan-shaped, centrally perforated Recess (30) is arranged, and with a in the housing (12) arranged, a through-channel (72) and having a crowned end (64) in the pan-shaped recess (30) supporting the nozzle body (62) whose longitudinal axis (70) is inclined to the longitudinal axis (26; 124) of the housing (12) and is offset by the liquid flowing through the housing (12) in a circulating movement, wherein the longitudinal axis (70) of the nozzle body (62) rotates on a conical surface and the Nozzle body (62) with a contact surface (86) at its periphery on a support surface (40) is supported, wherein downstream of the support surface (40) on the wall of the housing (12) a plurality of Strömungswiders in the circumferential direction at a distance from each other are arranged, for the impact of liquid in each case one in the housing (12) projecting baffle surface (52; 120), characterized in that each baffle surface (52; 120) is directly upstream of a baffle surface (54; 122) with respect to the flow direction of the liquid, to which the baffle surface (52; 120) connects continuously, the baffle surface (54 122) is oriented obliquely to a radial plane with respect to the longitudinal axis (26; 124) of the housing (12).

A rotor nozzle according to claim 1, characterized in that the baffles (52; 120) are arranged at least in regions in a radial plane relative to the longitudinal axis (26; 124) of the housing (12).

3. Rotary nozzle according to claim 1 or 2, characterized in that the guide surfaces (54; 122) are arched at least in regions arcuately.

4. Rotary nozzle according to one of the preceding claims, characterized in that each guide surface (54; 122) in combination with the baffle surface (52; 120) adjoining the guide surface (54; 122) has a ring-shaped extension (55; 123) the interior (20) of the housing (12) is formed.

5. Rotary nozzle according to one of the preceding claims, characterized in that a plurality of baffles and guide surfaces (52, 54; 120, 122) are arranged alternately in succession relative to the flow direction of the liquid.

6. Rotary nozzle according to one of the preceding claims, characterized in that each guide surface (54; 122) in combination with the baffle surface (52; 120) adjoining the guide surface (54; 122) extends in a direction perpendicular to the longitudinal axis (26; 124). aligned plane forms an S-shaped or sawtooth-shaped contour.

7. Rotary nozzle according to one of the preceding claims, characterized in that the flow resistance elements (118) are formed in a wall of the housing (12).

8. Rotary nozzle according to one of claims 1 to 6, characterized in that the flow resistance elements (50) of a in the housing (12) insertable insert part (46) are formed.

9. rotor nozzle according to claim 8, characterized in that the insert part (46) along its circumference has a constant wall thickness.

10. A rotor nozzle according to claim 8 or 9, characterized in that the insert part (46) with the housing (12) rotatably and axially immovably connected.

11. Rotary nozzle according to claim 8, 9 or 10, characterized in that the insert part (46) with the housing (12) is screwed and a stop surface (60) which in the end position of the insert part (46) on an inner shoulder (36 ) of the housing (12) can be applied.

12. Rotary nozzle according to claim 11, characterized in that the insert part (46) has an external thread (48) which cooperates with a first internal thread (34) of the housing (12).

13. Rotary nozzle according to claim 11 or 12, characterized in that the screwing of the insert part (46) corresponds to the flow direction of the liquid in the interior (20) of the housing (12).

14. Rotary nozzle according to claim 12, characterized in that the first internal thread (34) is more stable.

15. A rotor nozzle according to claim 12, 13 or 14, characterized in that the rotor nozzle (10) with a connectable to the housing (12) connecting part (88) for connection to a liquid supply line.

16. Rotary nozzle according to claim 15, characterized in that the connecting part (88) has an external thread (90) which can be screwed into a second internal thread (44) of the housing (12).

17. Rotary nozzle according to claim 16, characterized in that the direction of rotation of the second internal thread (44) coincides with the direction of rotation of the first internal thread (34).

18. Rotary nozzle according to claim 16, characterized in that the

Direction of rotation of the second internal thread (44) is opposite to the direction of rotation of the first internal thread (34).

19. Rotary nozzle according to one of claims 15 to 18, characterized in that the connecting part (88) with the housing (12) is rotatably connected.