DE102021214670A1 - Sealing arrangement, discharge arrangement and discharge element - Google Patents

Abstract

Sealing arrangement (100) for sealing between two receiving spaces (102) for receiving two media in the area of a force-transmitting, movable device element (103), e.g. a shaft (104) or a piston rod, the sealing arrangement (100) comprising: an annular sealing element (108 ), which rests against the device element (103) in the assembled state for sealing purposes; and a diverting element (150) which, in the installed state, is in electrically conductive contact with at least one surface contact region (105) of the device element (103) via at least one diverting contact region (152).

Description

The present invention relates to a sealing arrangement, a discharge arrangement and an annular discharge element suitable for these arrangements.

The object of the present invention is to provide an arrangement and in particular a sealing arrangement and components therefor, with which the maintenance effort for systems with electrical machines, e.g. for fully or partially electrically powered vehicles, can be reduced.

According to the invention, this object is achieved by the features of claim 1 .

In connection with the invention, it has been found that the service life of bearings in systems with electrical machines, e.g. in fully or partially electrically powered vehicles, can often be extended by the sealing arrangement according to the invention.

It is assumed that bearing damage in systems with electrically driven machines, e.g. with electric motors, is caused by static charging of the components and sudden discharges of electrical energy. A discharge can also lead to welding of components.

The invention makes it possible to prevent bearing damage and the welding of components by creating electrical conductivity between machine elements to be sealed off from one another via the discharge element. This prevents static charging from the outset and thus avoids bearing damage associated with discharges. This further reduces the effort required to maintain the systems.

The sealing arrangement is in particular a radial shaft seal or comprises a radial shaft seal. Such sealing arrangements are made, for example DE 10 2014 100 577 A1 and DE 10 2016 205 057 A1 known.

In principle, the movable device element can be any movable device element to which a sealing arrangement according to the invention can be sensibly attached. The movable device element can be, for example, a shaft or a piston rod.

The movable device element is preferably a shaft, very particularly preferably a shaft connected to an electrical machine. This means a shaft that is driven directly (e.g. via a gear) or directly (e.g. via a gear) by an electric machine acting as an electric motor or which drives an electric machine acting as a generator directly (e.g. via a gear) or directly. In an electrically driven vehicle, the shafts connected to electric machines usually perform both functions alternately during acceleration and braking.

The designation “annular” in connection with the term “annular sealing element” means that the sealing element extends around the device element in the assembled state.

In certain embodiments, the cross-section of the device element may deviate from the round shape. Sealing elements adapted thereto are also included in the term “annular sealing element”. The outer edge of the ring-shaped sealing element can also have any shape.

The sealing arrangement comprises a diverting element which, in the installed state, is in electrically conductive contact with at least one surface contact region of the device element via at least one diverting contact area. The discharge element is also preferably grounded or grounded. The term “measured” means, for example, that there is an electrically conductive connection from the discharge element to the environment, in particular via a housing of the sealing arrangement.

The diverting element is preferably also ring-shaped. In this context, the term “annular” means that the discharge element extends around the device element in the assembled state.

When reference is made herein to an assembled condition, what is meant is the assembled condition of the seal assembly on the device element, e.g.

The diverting element can be in electrically conductive contact with a corresponding number of surface contact regions of the device element via 2 to 60, preferably 3 to 54, more preferably 4 to 48, particularly preferably 4 to 42, e.g. via 5 to 36 diverting contact areas.

The diverting contact areas are preferably each equidistant from the nearest diverting contact area(s) along the circumference of the device element.

However, it is also possible for the discharge element to be a wire or a stranded wire which can be connected to the sealing element or integrated into the sealing element, for example.

The sealing element itself is typically electrically insulating.

For example, the sealing element can be polymer-based. The sealing element itself and in particular its polymer material can itself preferably be electrically insulating. The sealing element may be a fluoropolymer sealing element, e.g., a polytetrafluoroethylene (PTFE) sealing element. For example, it can be a sealing lip element made of a PTFE material. Electrical conductivity of the polymer-based sealing element is also preferably not established, in particular neither by an electrically conductive filler (graphite or copper particles) nor by an electrically conductive coating (silver paint or copper foil).

In the assembled state, the electrically conductive contact to the device element is preferably conveyed via the at least one diverting contact area by a force that presses the diverting contact area to the surface contact area.

The force can e.g. emanate from the discharge element itself or from another element of the sealing arrangement. The force preferably emanates at least partially from the diverting element itself.

The force may be due, at least in part, to a preload. The prestressing can be a prestressing of the discharge element or another element of the sealing arrangement, the prestressing is preferably a prestressing of the discharge element.

The diverting element can, for example, be mounted in the sealing arrangement under mechanical tension.

Typically, the diverting element is not embedded in the sealing element, nor is a coating applied to a surface of the sealing element.

The diverting element can be a component that is separate from the sealing element.

The diverting element is preferably prestressed in the installed state and is in electrically conductive contact via the at least one diverting contact area with at least one surface contact area of the device element and there is an electrically conductive connection from the diverting element to the environment, in particular via a housing of the sealing arrangement.

In the mounted state, the diverting element is preferably in direct electrically conductive contact with the at least one surface contact region of the device element via the at least one diverting contact region. The direct electrically conductive contact can be established via direct physical contact between the at least one discharge contact area and the at least one surface contact area.

The device element preferably has a round cross-section. For example, it is a wave. The force preferably acts in the radial direction and can preferably be at least partly due to a prestress acting in the radial direction. This means that at least one force component can act orthogonally on the surface contact area to the axis of the shaft.

At least part of the prestressing is preferably effected by the discharge element itself. Of course, this does not rule out the possibility that one or more other elements of the sealing arrangement are also under prestress.

The discharge element is preferably elastic. The preload can be accompanied by a reversible, e.g. elastic, mechanical deformation of the discharge element.

In general, the diverting element includes the diverting contact area. The diverting element can be an annular spring element. A spring effect of the spring element can be based on a metal comprised by the spring element or a metal alloy comprised by the spring element. In the assembled state, the electrically conductive contact can be established via a direct physical contact of the at least one diverting contact area with the at least one surface contact area.

It can therefore be particularly preferred according to the invention if the diverting element comprises the diverting contact area, the diverting element is an annular spring element, a spring action of the spring element is based on a metal comprised by the spring element or a metal alloy comprised by the spring element and, in the installed state, the electrically conductive contact has a direct connection physical contact of the at least one diverting contact area is made to the at least one surface contact area. Preferably the direct physical contact is direct physical contact of the metal or the metal alloy to the surface contact area.

Preferably, at least a first area of the discharge element assumes a greater angle to the surface contact area of the device element than a second area of the discharge element.

The first area of the diverting element is, for example, a suspension area of the diverting element. For example, the suspension portion may be substantially planar and oriented orthogonally to the axis of the shaft.

The second area of the diverting element can be a conducting area, for example, which lies between the suspension area and the diverting contact area. The conducting area can, for example, extend as far as the diverting contact area. The term conduction area only expresses the fact that this area conducts electricity. The term guiding area does not restrict the shape of the area designated by it.

To determine the two angles mentioned, e.g. the suspension area, the guiding area and the surface contact area can each be approximated by a plane and the angles that the corresponding planes assume in relation to one another can be determined. The three planes are chosen to coincide with the faces of a prism.

If the two angles mentioned are different, the diverting element is mechanically deformed or deflected by a prestressing force, so that in the mounted state the electrically conductive contact to the device element is conveyed via the at least one diverting contact area by a force that presses the diverting contact area to the surface contact area .

Partial areas of the discharge element can be attached to the sealing element by means of a positive, material or non-positive connection.

The sealing arrangement can comprise a sealing disk element and the discharge element can extend parallel to a surface of the sealing disk element in the suspension area. The sealing disk element can form the sealing element of the sealing arrangement or be an element of the sealing arrangement that is different from the sealing element. The sealing disk element is preferably an element of the sealing arrangement that is different from the sealing element.

The discharge element can extend along the surface of the sealing disk element in the suspension area. At least a partial area of the suspension area can be attached to the sealing disk element by means of a positive, material or non-positive connection.

The diverting element can move away from the surface of the sealing disk element in the conducting region and the at least one diverting contact region can be in electrically conductive contact with a surface contact region that is offset from the sealing disk element.

The gasket element itself is typically electrically insulating.

The discharge element can include a transition area. In the transition area, a radially outer area encompassed by the diverting element can merge into a radially inner area encompassed by the diverting element. In the transition area, the diverting element can, for example, be more prestressed and/or bent more than in the radially outer and/or radially inner area. In the transition area of the discharge element, for example, spring segments lying radially on the inside can merge into the suspension area lying radially on the outside.

Starting from the transition area of the discharge element, spring segments can extend adjacent to one another, e.g. in the radial direction. At least some of the spring segments are preferably diverting spring segments, each with at least one diverting contact area. The proportion of discharge spring segments among the spring segments can be, for example, 3 to 80%, preferably 4 to 70%, particularly preferably 5 to 60%.

The diverting element can preferably press the sealing element against the device element, e.g. against the shaft.

A part of the spring segments can be sealing spring segments that press the sealing element against the device element.

The sealing spring segments can, for example, press on a radially outer side of the sealing element. As a result, the diverting element can press the sealing element onto the device element, e.g. onto the shaft. The proportion of sealing spring segments among the spring segments can be, for example, 15 to 98%, preferably 20 to 96%, particularly preferably 40 to 94%.

At least one discharge spring segment can preferably run between the transition area and the discharge contact area at a distance from the radially outer side of the sealing element.

However, at least one spring segment can also act simultaneously as a discharge spring segment and as a sealing spring segment. A section of the spring segment that protrudes beyond a radially inner end of the sealing element can be prestressed more strongly than a section of the spring segment that extends to the radially inner end of the sealing element. The diverting contact area can be formed at the end of the section of the spring segment that protrudes beyond the end of the sealing element.

The seal assembly may include a sloping alignment portion. The oblique alignment section can be an alignment section in the shape of a truncated cone.

The sloping alignment section can be used to reshape and/or support the sealing element. The sloping alignment section can encompass sections of the sealing element on its radially inner side. Preferably, the diverting element can then press the sealing element against the oblique alignment section and against the device element, e.g. against the shaft.

Thus, the diverting element can be deformed, elastically deformed and/or prestressed by means of the oblique alignment section via a sealing element located between the alignment section and the diverting element.

An alignment section may be formed on a receiving ring of the seal assembly. An alignment portion may be formed on a shaping member. A first alignment section can be formed on a receiving ring and a second alignment section can be formed on a shaping element. The shaping element can thus be an element of the sealing arrangement that is different from the receiving ring.

The seal assembly may include a shaping element. The shaping element can comprise an alignment section running obliquely to the radial direction, e.g. in the form of the alignment section in the shape of a frustoconical envelope. The shaping element can also comprise an annular disk-shaped section. The annular disk-shaped section can adjoin the alignment section, e.g. adjoin the alignment section radially on the outside.

If a part of the diverting element runs along an obliquely running alignment section, the alignment section is also referred to herein as the diverting alignment section.

If a part of a sealing element runs along an oblique alignment section, the alignment section is also referred to herein as a seal alignment section.

The diverting element can be deformed, elastically deformed and/or pretensioned by means of an oblique alignment section of the sealing arrangement.

A part of the diverting element can be guided on a diverting alignment section or between two diverting alignment sections and thus aligned such that the at least one diverting contact area is in electrically conductive contact with a surface contact area of the device element, e.g. the shaft.

If the part of the diverting element is guided between two diverting alignment sections, one of the diverting alignment sections can be formed, for example, on a receiving ring and the other diverting alignment section can be formed, for example, on a shaping element described in more detail elsewhere herein.

The two surfaces of the diverting alignment sections, between which the part of the diverting element is guided, then preferably run parallel to one another.

The diverting element can be prestressed in an area between a diverting alignment section, on which part of the diverting element is guided, and the diverting contact area.

It can be particularly advantageous if, in the installed state, a plurality of diverting contact regions of the diverting element that are spaced apart from one another are in electrically conductive contact with a respective surface contact region of the device element.

The object is also achieved according to the invention by the features of claim 13 .

The discharge arrangement does not include the sealing element described in connection with the sealing arrangement and preferably also not the sealing disk element described in connection with the sealing arrangement. However, all other features that are described in connection with the sealing arrangement according to the invention can represent features of the discharge arrangement according to the invention.

The features of the discharge element described in connection with the sealing arrangement can of course also be features of the diverting element of a diverting arrangement according to the invention.

The object is also achieved according to the invention by the features of claim 14 .

The features of the discharge element described in connection with the sealing arrangement can of course also represent features of the discharge element according to the invention.

The ring-shaped diverting element can be designed as a spring element. The spring effect of the spring element can be based on a metal comprised by the spring element or a metal alloy comprised by the spring element, e.g. on steel, spring steel, stainless spring steel or a beryllium copper alloy.

The ring-shaped diverting element is preferably designed as a spring plate. The spring board can be a stamped or stamped sheet metal spring board. The spring board may be available or fabricated using laser machining, etching, and/or additive manufacturing. The spring board may be a metal or metal alloy spring board, e.g., a steel spring board, a spring steel spring board, a spring steel spring board containing a stainless spring steel, or a copper beryllium spring board.

The copper beryllium alloy can contain other alloy components.

The thickness of the discharge element, in particular the spring element or the spring plate, can be at least 0.05 mm, for example.

In a transition area of the diverting element, radially inner spring segments can transition into a radially outer suspension area.

The diverting element preferably comprises spring segments formed adjacent to one another, with only some of the spring segments being diverting spring segments. Their diverting contact areas preferably extend further into a central receiving area of the diverting element than other spring segments.

The central receiving area of the diverting element is the central opening of the diverting element which serves to accommodate the device element, e.g. the shaft, around which the annular diverting element extends.

The number of spring segments can be e.g. 8 to 120, in particular 10 to 80.

A diverter spring segment may include a head portion and a neck portion. The neck portion may extend to the head portion. The header area can include the bleeder contact area.

The end of an I-shaped or T-shaped projection of a spring segment can form the diverting contact area.

For example, the end of a T-shaped projection of a spring segment can form the diverting contact area.

Two legs of a discharge spring segment can be longer than the corresponding legs of the adjacent spring segment. A transition from one longer leg to the other longer leg can form the discharge contact area.

At least one diverting contact area can have an adaptation area. The adaptation area can be designed in such a way that it does not only abut at one point on the surface contact area of a device element with a round cross-section, e.g. not only abuts at one point on the surface contact area of the shaft when the discharge contact area is pressed against the surface contact area by a force.

Contact at only one point is assumed if, for example, a straight edge forms a discharge contact area and this is in contact with the surface of the shaft. Since a tangent touches a circle at only one point, such a bleeder contact is referred to herein as punctiform.

If, for example, a neck area runs with a defined inclination to the surface contact area of a shaft of a certain radius, the adaptation area can be in electrically conductive contact with the shaft at several points, preferably over its entire length.

If the discharge contact area is inclined at the surface contact area of the shaft, the radius of the adjustment area can be approximated or adapted to the radius of the shaft.

The annular diverting element can be an annular sealing diverting element, having the diverting element in combination with a sealing ring, e.g. The at least one diverting contact area can therefore be in a central receptacle area of the sealing ring into which, for example, a shaft can be inserted.

Partial areas of the diverting element can be attached to the sealing ring in a positive, material or non-positive manner. A guide area of the diverting element is preferably not connected to the sealing ring in a surface area of the sealing ring adjoining the inner edge of the sealing ring.

Consequently, the diverting element can move away from the surface of the sealing ring in the conducting area and the at least one diverting contact area can be in electrically conductive contact with a surface contact area offset from the sealing ring. As a result, during assembly of the sealing arrangement, a desired prestress can be set with the least possible effort, which keeps the discharge contact area in electrical contact with the surface contact area.

The features described in connection with the diverting element according to the invention can of course also represent features of the diverting element of the sealing arrangement or diverting arrangement according to the invention.

Further preferred features and/or advantages of the invention are the subject of the following description and the graphic representation of exemplary embodiments.

• 1 einen schematischen Schnitt durch eine bekannte Dichtungsanordnung;
• 2 einen schematischen Schnitt durch eine weitere bekannte Dichtungsanordnung;
• 3 eine schematische Darstellung einer ersten Dichtungsanordnung;
• 4 ein Schnitt der in 3 gezeigten ersten Dichtungsanordnung entlang A-A;
• 5 eine vergrößerte Darstellung des Ausschnitts Y aus 4;
• 6 eine schematische perspektivische Darstellung der ersten Dichtungsanordnung, geschnitten entlang A-A;
• 7 eine schematische Darstellung einer zweiten Dichtungsanordnung;
• 8 ein Schnitt der in 7 gezeigten zweiten Dichtungsanordnung entlang B-B;
• 9 eine vergrößerte Darstellung des Ausschnitts Z aus 8;
• 10 eine schematische perspektivische Darstellung der zweiten Dichtungsanordnung, geschnitten entlang B-B;
• 11 einen schematischen Schnitt durch eine dritte Dichtungsanordnung;
• 12 einen schematischen Schnitt durch eine vierte Dichtungsanordnung;
• 13 einen schematischen Schnitt durch eine fünfte Dichtungsanordnung;
• 14 eine perspektivische Darstellung einer Federplatine ohne Ableitfunktion;
• 15 eine perspektivische Darstellung einer weiteren Federplatine ohne Ableitfunktion;
• 16 einen Ausschnitt eines ersten Ableitelements;
• 17 einen Ausschnitt eines zweiten Ableitelements;
• 18 einen Ausschnitt eines dritten Ableitelements; und
• 19 einen Ausschnitt eines vierten Ableitelements.

In the drawings show:

• 1 a schematic section through a known sealing arrangement;
• 2 a schematic section through another known sealing arrangement;
• 3 a schematic representation of a first sealing arrangement;
• 4 a cut of the in 3 shown first sealing arrangement along AA;
• 5 an enlarged representation of section Y 4 ;
• 6 a schematic perspective view of the first seal assembly, sectioned along AA;
• 7 a schematic representation of a second sealing arrangement;
• 8th a cut of the in 7 shown second sealing arrangement along BB;
• 9 an enlarged representation of section Z 8th ;
• 10 a schematic perspective view of the second seal assembly, sectioned along BB;
• 11 a schematic section through a third sealing arrangement;
• 12 a schematic section through a fourth sealing arrangement;
• 13 a schematic section through a fifth seal assembly;
• 14 a perspective view of a spring board without dissipation function;
• 15 a perspective view of another spring board without dissipation function;
• 16 a section of a first diverting element;
• 17 a section of a second diverting element;
• 18 a section of a third diverting element; and
• 19 a section of a fourth diverting element.

Identical or functionally equivalent elements are provided with the same reference symbols in all figures.

The in the 1 , 2 , 3-6 , 7-10 , 11 , 12 and 13 The illustrated embodiments of sealing arrangements designated as a whole with 100 each serve to seal between two receiving spaces 102 in the area of a shaft 104.

The embodiments of 1 and 2 are made DE 10 2014 100 577 A1 and DE 10 2016 205 057 A1 known.

In all of the embodiments, the sealing arrangement 100 in particular forms a separation between the receiving spaces 102, through which the respective shaft 104 is guided.

The shaft 104 extends in particular from one receiving space 102 into the other receiving space 102.

The sealing arrangement 100 comprises, in particular, a radial shaft sealing ring 106.

In the 1 The sealing arrangement 100 shown comprises a sealing element 108, which is designed, for example, as a sealing lip element 110 made from a PTFE material, and a spring element 112, which is designed, for example, as a spring plate 114.

The spring plate 114 is designed, for example, as an embossed or stamped sheet metal component forms. The spring board 114 may include spring segments 117 formed along a circumferential direction 115, for example, as described in FIG 14 and 15 shown. It can also include spring segments 117 that are designed to meander along a circumferential direction 115, as shown in FIG DE 10 2014 100 577 A1 , 4 , shown.

The sealing element 108 and the spring element 112 are accommodated by a housing 116 of the sealing arrangement 100 . For this purpose, the housing 116 comprises in particular a receiving ring 118 and a fastening element 120.

The sealing element 108 and the spring element 112 are clamped between the receiving ring 118 and the fastening element 120 . The fastening element 120 is fixed to the receiving ring 118 by means of a flanged deformed section 122 of the receiving ring 118 , in particular in order to clamp the spring element 112 and the sealing element 108 between the receiving ring 118 and the fastening element 120 .

The sealing element 108 and the spring element 112 each comprise a flat and/or level section 124 which extends in particular in a radial direction 126 . The radial direction 126 relates in particular to an axis of rotation 128 of the shaft 104.

The radial direction 126 is in particular aligned essentially perpendicular to the axis of rotation 128 .

A direction running parallel to the axis of rotation 128 is referred to as the axial direction 130 .

In addition to the flat and/or planar section 124, the sealing element 108 and the spring element 112 each include a curved section 132. The curved sections 132 are, in particular, flexible sections 134.

The curved section 132 of the sealing element 108 adjoins the flat and/or planar section 124 of the sealing element 108 on the inside in the radial direction 126 .

The curved section 132 of the spring element 112 closes in the example according to FIG 1 also on the inside in the radial direction 126 to the flat and/or planar section 124 of the spring element 112 . The spring element 112 is arranged in the region of the curved section 132 on a side 136 of the curved section 132 of the sealing element 108 that is on the inside in the radial direction 126 .

A substantially J-shaped cross section of the sealing element 108 is formed by means of the curved section 132 and the flat and/or planar section 124 of the sealing element 108 .

A substantially J-shaped cross section of the spring element 112 is formed by means of the curved section 132 and the flat and/or planar section 124 of the spring element 112 .

According to FIG 1 an annular contact projection 140 of the sealing element 108 is provided. This contact projection 140 projects further inward in the radial direction 126 in the direction of the axis of rotation 128 of the shaft 104 than the spring element 112. The contact projection 140 thus forms a contact section 142 of the sealing element 108, with which the sealing element 108 in the assembled state of the sealing arrangement 100 is preferably on the Shaft 104 is applied.

The contact projection 140 preferably also forms a friction section 144 of the sealing element 108, which absorbs heat through friction when the shaft 104 is rotating or moving linearly.

By selecting a suitable material for the sealing element 108 and the spring element 112, the spring element 112, in particular the curved section 132 of the spring element 112, can also preferably serve as a support section 146 for supporting the sealing element 108.

In the 2 The sealing arrangement 100 shown is similar to that in FIG 1 Seal assembly 100 shown. Instead of the spring element 112, the seal assembly 100 of 2 however, a shaping element 111 for shaping and/or supporting sealing element 108.

In the 2 The sealing arrangement 100 shown also includes one or more clamping discs and/or one or more secondary sealing elements, which are 2 are arranged on the right of the sealing element 108 .

One or more sealing elements 108, one or more shaping elements 111 and one or more clamping disks and one or more secondary sealing elements are designed at least in sections in the shape of a circular ring disk, with in particular a respective outer diameter being designed essentially identically. As a result, the elements mentioned can be easily and reliably accommodated in the receiving ring 118 .

Receiving ring is to, as in 1 shown provided with a crimped receiving portion.

The shaping element 111 comprises, in particular, a section 129 in the form of a ring disk, which is arranged, in particular, radially on the outside.

Furthermore, the shaping element 111 comprises a sealing alignment section 131 which runs obliquely to the radial direction 126 and which is arranged in particular radially on the inside and adjoins the annular disk-shaped section 129 .

The sloping sealing alignment section 131 is in particular a truncated cone-shaped sealing aligning section 133 of the shaping element 110. The sloping sealing alignment section 131 partially surrounds the sealing element 108 on its radially inner side. In particular, the sealing element 108 can rest against the shaping element 111 due to the inclined seal alignment section 131 of the shaping element 111 and/or be reshaped and/or pretensioned and/or deformed by the shaping element 111 .

The shaping element 111 and the sealing element 108 are essentially L-shaped or J-shaped, in particular to enable the radially inner end of the sealing element 108 to bear resiliently against the shaft 104 .

3 until 6 show a first sealing arrangement 100 for sealing between two receiving spaces 102 for receiving two media in the region of a shaft 104. The sealing arrangement 100 comprises an annular sealing element 108 which bears against the shaft 104 for sealing purposes.

The sealing arrangement 100 also includes a diverting element 150, which in particular 5 and 6 is clearly recognizable. The diverting element 150 is designed as a spring plate 114 and is in electrically conductive contact via nine mutually spaced diverting contact areas 152, each with a surface contact area 105 of the shaft 104. The mutually spaced diverting contact areas 152 are off 6 not visible, since details on the execution of the spring plate are not shown there.

The electrically conductive contact to the shaft via the diverting contact areas 152 is promoted in each case by a force acting in the radial direction, which presses the respective diverting contact area 152 against the associated surface contact area 105 . The respective force is due to a preload which is caused at least in part by the spring plate 114 itself.

In particular 5 It is easy to see that a suspension area 153 of the diverting element is at an angle of approximately 90° to the surface contact area 105 of the shaft 104 . A conduction area 155 lying between the suspension area 153 and the discharge contact area 152, which extends as far as the discharge contact area 152, assumes an angle of significantly less than 90° to the surface contact area 105.

The angle that the suspension area 153 makes to the surface contact area 105 is therefore larger than the angle that the guide area 155 makes to the surface contact area 105 .

In the 3 until 6 The sealing arrangement 100 shown comprises a sealing disk element 170 that differs from the sealing element 108. The discharge element 150 extends in the suspension area 153 parallel to a surface of the sealing disk element 170 and is attached in the suspension area 153 to the surface of the sealing disk element 170 in a force-fitting and/or materially bonded manner. The diverting element 150 moves away from the surface of the sealing disk element 170 in the guiding region 155. The diverting contact regions 152, of which the section of FIG 5 only one can be seen are in electrically conductive contact with one surface contact area 105 that is offset from sealing disk element 170.

The first sealing arrangement 100 according to FIG 3 until 6 can be produced in a particularly simple manner with a flat spring circuit board 114 whose discharge contact areas 152 lie on the circumference of a circle. Care must be taken that the diameter of this circle is only slightly smaller than the diameter of the shaft 104 . Because then the arrangement of the spring plate 114 around the shaft 104 necessarily leads to (elastically) deforming guide areas 155, so that a pretension presses the respective discharge contact area 152 against the associated surface contact area 105 and this is offset from the sealing disk element, as in 5 shown.

It is preferred here if spring segments 117 extend adjacent to one another, starting from a transition area 154 of the spring plate, with at least some of the spring segments 117 being discharge spring segments 156 each having at least one discharge contact area 152 (see Fig 14 until 19 ). The transition area 154 can be approximated by a circle whose diameter is significantly larger than the diameter of the shaft 104. The distance between the transition area and the shaft can be used to determine how long the guiding areas 155 moving away from the surface of the sealing disk element 170 are and how steeply they are at the surface contact areas 105 .

In the 3 until 6 The sealing arrangement 100 shown could also be designed without a sealing element 108 as a discharge arrangement according to the invention. The sealing arrangement 100 could also be designed as a discharge arrangement without a sealing element 108 and without a sealing disk element 170 . For this purpose, z fastening elements 120 could be matched to one another, deviating from the sealing arrangement 100 shown, such that the remaining elements that extend into the area between receiving ring 118 and fastening element 120 are firmly accommodated between receiving ring 118 and fastening element 120 .

7 until 10 show a second sealing arrangement 100 for sealing between two receiving spaces 102 for receiving two media in the region of a shaft 104. The sealing arrangement 100 comprises an annular sealing element 108 which bears against the shaft 104 for sealing purposes.

The sealing arrangement 100 also includes a diverting element 150, which in particular 9 and 10 is clearly recognizable. The diverting element 150 is designed as a spring plate 114 and is in electrically conductive contact via nine mutually spaced diverting contact areas 152, each with a surface contact area 105 of the shaft 104. The mutually spaced diverting contact areas 152 are off 10 not visible, since details on the execution of the spring plate are not shown there.

The electrically conductive contact to the shaft via the diverting contact areas 152 is promoted in each case by a force acting in the radial direction, which presses the respective diverting contact area 152 against the associated surface contact area 105 . The respective force goes back to a preload that is caused by the spring plate 114 itself.

In particular 9 It is easy to see that a suspension area 153 of the discharge element 150 is at an angle of approximately 90° to the surface contact area 105 of the shaft 104 . The suspension area 153 is clamped between the sealing element 108 and the disk element 172 . This is because the fastening element 120 is fixed to the receiving ring 118 by means of the flanged deformed section 122 of the receiving ring 118 and presses the disc element 172 onto the suspension area 153.

A conducting area 155 lying between the suspension area 153 and the diverting contact area 152 assumes an angle of significantly less than 90° to the surface contact area 105 .

The angle that the suspension area 153 assumes in relation to the surface contact area 105 is therefore also in the case of the second sealing arrangement 100 7 until 10 larger than the angle that the conducting area 155 assumes with respect to the surface contact area 105 .

In the case of the second sealing arrangement 100, a preload existing in the spring plate also presses the sealing element 108 against the shaft 104.

Starting from a transition area 154 of the diverting element 150, spring segments 117 extend adjacent to one another. Some of the spring segments 117 are diverting spring segments 156, each with at least one diverting contact area 152. Another part of the spring segments 117 are sealing spring segments 158, which press onto an outer side 148 of the sealing element 108 (please refer 14 until 19 ).

9 12 shows that an obliquely running seal alignment section 131 in the form of a seal alignment section 133 in the shape of a truncated cone is formed on the receiving ring 118 . The diverting element 150 is deformed, elastically deformed and/or prestressed by means of this obliquely running seal alignment section 131, 133 of the second sealing arrangement via the sealing element 108 lying between the seal alignment section 131, 133 and the diverting element.

The third seal assembly 100, the section of 11 shown is similar to the second seal arrangement. However, it manages without the sealing spring segments 158 which press on the outer side 148 of the sealing element 108 . Here, all spring segments 117 act simultaneously as discharge spring segment 156 and as sealing spring segment 158. A section of spring segment 117 that protrudes beyond the end of sealing element 108 is more prestressed than a section of spring segment 117 that extends to the end of sealing element 108. The discharge contact area 152 is at the end of the portion of spring segment 117 that protrudes beyond the end of sealing member 108.

The unbiased state of the discharge element 150 is in 11 additionally shown in the vertically aligned dashed oval.

In the 11 The sealing arrangement 100 shown could also be designed as a discharge arrangement without a sealing element 108 . To this could For example, the shape of the receiving ring 118 and that of the fastening element 120, deviating from the sealing arrangement 100 shown, can be matched to one another in such a way that the remaining elements that extend into the area between the receiving ring 118 and the fastening element 120 are firmly accommodated between the receiving ring 118 and the fastening element 120.

The fourth seal assembly 100, the section of 12 is shown, as a further development, an in DE 10 2016 205 507 A1 described sealing arrangement are understood.

In the case of the fourth sealing arrangement 100, an obliquely running discharge alignment section 168 in the form of a discharge alignment section in the shape of a truncated cone is formed on the receiving ring 118.

The fourth sealing arrangement 100 also includes a shaping element 111, which includes an annular disk-shaped section, which is arranged radially on the outside. Furthermore, the shaping element 111 comprises an alignment section 166 running obliquely to the radial direction 126 in the form of a discharge alignment section in the shape of a truncated cone, which is arranged radially on the inside and adjoins the annular disk-shaped section.

A part of the diverting element 150 is guided between the diverting alignment sections 166 and 168 and thereby aligned in such a way that the diverting contact regions 152, of which the section of FIG 12 only one can be seen in electrically conductive contact with a respective surface contact area 105 of the shaft 104 .

The diverting element 150 is deformed, elastically deformed and/or prestressed by means of the obliquely running diverting alignment sections 166, 168.

In the fourth sealing arrangement, the obliquely running discharge alignment section 166 also forms a seal alignment section, which partially encompasses the sealing element 108 on its radially inner side 136 .

The fifth seal assembly 100, the section of 13 is shown can be interpreted as a further development of the fourth sealing arrangement 100 . The fifth sealing arrangement 100 differs from the fourth sealing arrangement 100 in that the diverting element 150 is prestressed in the region between a diverting alignment section 166 , 168 and the diverting contact area 152 .

In the 12 and 13 The sealing arrangements 100 shown could also be designed as a discharge arrangement without a sealing element 108 . For this purpose, for example, the shape of the receiving ring 118 and that of the fastening element 120 could be matched to one another, deviating from the sealing arrangements 100 shown, such that the remaining elements that extend into the area between the receiving ring 118 and the fastening element 120 are each fixed between the receiving ring 118 and the fastening element 120 are recorded.

14 and 15 show ring-shaped spring elements 112, which are designed as ring-shaped spring plates 114 stamped out of sheet metal. The spring plates 114 shown comprise spring segments 117 formed adjacent to one another. The spring segments 117 extend, starting from a transition area 154 of the discharge element 150, adjacent to one another. All of the spring segments 117 extend equally far into a central receiving area of the spring plate 114 . Neither spring segment 117 is a diverter spring segment, and none of the spring segments 117 includes a diverter contact area.

According to the invention it is possible, the spring elements 112 or spring plates 114, for example those from 14 or 15 , to run as diverting elements 150 . 16 until 19 each show a section of such ring-shaped diverting elements 150.

Show like this 16 until 19 each show an annular diverting element 150 designed as a spring element 112 or spring plate 114 for establishing an electrically conductive contact to a shaft in the area of a sealing arrangement 100 described herein to at least one surface contact area 105 of the shaft 104.

Each of the 16 until 19 The diverting elements 150 shown comprises spring segments 117 formed adjacent to one another. Only some of the spring segments 117 are diverting spring segments 156. Their diverting contact area 152 extends further into a central receiving area of the diverting element 150 than other spring segments 117. The other spring segments are, for example, sealing spring segments 158, which are mounted in the State of the sealing arrangement can press on an outer side 148 of a sealing element 108.

It is conceivable, for example, that every third, every fourth, every fifth or every sixth Federseg ment 117 is a diverting spring segment 156 and the diverting spring segments 156 are evenly distributed all around.

At the first, in 16 diverting element 150 shown, the end of an I-shaped projection of a spring segment 117 forms the diverting contact area 152.

At the second, in 17 In the diverting element 150 shown, two legs of a diverting spring segment 156 are longer than the corresponding legs of the adjacent spring segment 117. A transition from one longer leg to the other longer leg forms the diverting contact area 152.

At the third, in 18 diverting element 150 shown, the end of a T-shaped projection of a spring segment 117 forms the diverting contact area 152. The end of the T-shaped projection is a head area 160, to which a neck area 162 of the projection extends.

The header area 160 has an adjustment area 174 . The adaptation area 174 is designed in such a way that it does not only bear against the surface contact area 105 of a shaft 104 at one point when the discharge contact area 152 is pressed against the surface contact area by a force.

If the neck area 162 extends with a defined inclination to the surface contact area 105 of a shaft 104 of a specific radius, the adaptation area 174 can be in electrically conductive contact with the shaft over its entire length. That is, when the head area 160 is inclined at the surface contact area 105 of the shaft 104, the radius of the adjustment area 174 can be adapted to the radius of the shaft 104.

Reference List

100

sealing arrangement

102

recording room

103

fixture element

104

Wave

105

surface contact area

106

Radial shaft seal

108

sealing element

110

sealing lip element

111

shaping element

112

spring element

114

spring board

115

circumferential direction

116

Housing

117

spring segment

118

recording ring

120

fastener

122

forming section

124, 129, 132, 134

sections

126

radial direction

128

axis of rotation

130

axial direction

131, 133

Gasket Alignment Sections

136, 148

pages

138

end area

140

investment advantage

142

investment section

144

friction section

146

support section

150

discharge element

152

discharge contact area

153

suspension area

154

transition area

155

control area

156

discharge spring segment

158

sealing spring segment

160

header area

162

neck area

166, 168

diverting alignment sections

170

sealing disc element

172

disk element

174

customization area

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102014100577 A1 [0007, 0092, 0097]
• DE 102016205057 A1 [0007, 0092]
• DE 102016205507 A1 [0140]

Claims (17)

Sealing arrangement (100) for sealing between two receiving spaces (102) for receiving two media in the area of a force-transmitting, movable device element (103), e.g. a shaft (104) or a piston rod, the sealing arrangement (100) comprising: - An annular sealing element (108), which rests against the device element (103) in the assembled state for sealing purposes; and - a diverting element (150) which, in the assembled state, is in electrically conductive contact with at least one surface contact region (105) of the device element (103) via at least one diverting contact region (152). Sealing arrangement (100) after claim 1 , characterized in that the diverting element (150) comprises the diverting contact area (152), the diverting element (150) is an annular spring element (112), a spring action of the spring element (112) on a metal comprised by the spring element (112) or a spring element ( 112) comprised metal alloy is based and in the assembled state the electrically conductive contact is established via a direct physical contact of the at least one diverting contact area (152) to the at least one surface contact area (105). Sealing arrangement (100) after claim 1 or 2 , characterized in that in the assembled state the electrically conductive contact to the device element (103) is conveyed via the at least one diverting contact area (152) by a force which presses the diverting contact area (152) to the surface contact area (105). Sealing arrangement (100) after claim 3 , characterized in that the force is at least partially due to a bias. Sealing arrangement (100) after claim 4 , characterized in that the device element (103) has a round cross-section, the force acts in the radial direction and is at least partially due to a bias acting in the radial direction. Sealing arrangement (100) after claim 4 or 5 , characterized in that at least part of the bias is effected by the discharge element (150) itself. Sealing arrangement (100) according to one of the preceding claims, characterized in that at least a first area of the diverting element (150), for example a suspension area (153), assumes a larger angle to the surface contact area (105) of the device element than a second area of the diverting element ( 150), for example a conduction area (155) which lies between the suspension area (153) and the diverting contact area (152). Sealing arrangement (100) after claim 7 , characterized in that the sealing arrangement (100) comprises a sealing disc element (170) and the diverting element (150) extends in the suspension area (153) parallel to a surface of the sealing disc element (170), the diverting element (150) extends in the guiding area (155) away from the surface of the sealing disc element (170) and the at least one diverting contact area (152) is in electrically conductive contact with a surface contact area (105) that is offset from the sealing disc element (170). Sealing arrangement (100) according to one of the preceding claims, characterized in that spring segments (117) extend adjacent to one another, starting from a transition region (154) of the diverting element (150), with at least some of the spring segments (117) diverting spring segments (156) each having at least one discharge contact area (152). Sealing arrangement (100) according to one of the preceding claims, characterized in that the diverting element (150) presses the sealing element (108) against the device element (103). Sealing arrangement (100) according to one of the preceding claims, characterized in that the diverting element (150) is reshaped, elastically deformed and/or prestressed by means of a sloping alignment section (131, 133, 166, 168) of the sealing arrangement (100). Sealing arrangement (100) according to one of the preceding claims, characterized in that in the assembled state, a plurality of mutually spaced diverting contact regions (152) of the diverting element (150) are in electrically conductive contact with a respective surface contact region (105) of the device element (103). Dissipation arrangement for producing an electrically conductive contact to a force-transmitting, movable device element (103), e.g. to a shaft (104) or to a piston rod, the dissipation arrangement comprising: - a diverting element (150) which, in the assembled state, is in electrically conductive contact with at least one surface contact region (105) of the device element (103) via at least one diverting contact region (152). Annular discharge element (150) for producing an electrically conductive contact with a force-transmitting, movable device element (103), e.g. with a shaft (104) or with a piston rod, in the area of a sealing arrangement (100) or discharge arrangement, the discharge element (150) a discharge contact area (152) which, when the sealing arrangement (100) or discharge arrangement is in the installed state, is in electrical contact with at least one surface contact area (105) of the device element (103). Annular diverting element (150) according to Claim 14 , wherein the diverting element (150) is designed as a spring element (112), preferably as a spring plate (114). Annular diverting element (150) according to Claim 14 or 15 , characterized in that the diverting element (150) comprises spring segments (117) formed adjacent to one another, only some of the spring segments (117) being diverting spring segments (156) whose diverting contact areas (152) extend further into a central receiving area of the diverting element (150) extend in than other spring segments (117). Annular diverting element (150) according to Claim 14 , 15 or 16 , characterized in that at least one discharge contact area (152) has an adaptation area (174), the adaptation area (174) being designed in such a way that it is not only in contact with the surface contact area (105) of a device element (103) with a round cross section at one point, when the discharge contact area (152) is pressed against the surface contact area (105) by a force.

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