Hard seal ring with a sliding surface, sliding seal device and manufacturing method

Abstract

The present disclosure relates to a rigid sealing ring (1, 61) with a ring body (2, 2') having a rotationally symmetrical basic shape with respect to the axis (A). The ring body has a contact portion (3) arranged on one end face of the ring body (2, 2') in a cross section (Q) lying in the direction of the axis (A). The contact portion (3) faces outward in the direction of the axis (A). The ring body (2, 2') further has a trough portion (5) in the cross section (Q), which is arranged on the radial periphery of the ring body (2, 2') and is located on the opposite side of the contact portion (3) in the direction of the axis (A). The ring body (2, 2') has a sliding coating (8) on the contact portion (3), which is formed in particular in a single layer or in multiple layers. The present disclosure further relates to a sliding seal device (60) including a first hard seal ring (61) and a second hard seal ring (62) each having a contact portion (3), the hard seal rings (61, 62) being adjacent to each other along an axis (A) at a predetermined mounting position and being coaxially disposed with each other, whereby the contact portions (3) are in circumferential contact with each other.

Description

Technical Field

[0001] The present disclosure relates to a hard seal ring, a sliding seal device comprising at least two hard seal rings, and corresponding manufacturing techniques.

[0002] Conventionally known seal concepts based on hard seal rings with sliding surfaces are not optimally formed and have drawbacks in manufacturing. This seal concept is particularly difficult to adapt to new operating conditions and requires a significant investment in mold costs to provide new embodiments of hard seal rings.

[0003] Typically, hard seal rings with sliding surfaces are manufactured today in molds consisting of a relatively complex plurality of parts by centrifugal casting, gravity casting, or precision casting. Therefore, it is necessary to provide a new mold for each target shape of the hard seal ring. Manufacture by forging or deep drawing from a ring-shaped intermediate product is also possible, which likewise means high costs for providing the mold. Furthermore, conventional manufacturing methods result in high energy and material costs.

[0004] From German Patent Application Publication No. 102004042385, a method for manufacturing a sliding ring seal is known, in which the sliding ring is manufactured from gray cast iron. Subsequently, a wear layer is applied to the sliding ring by sintering.

[0005] U.S. Patent No. 3086782 discloses manufacturing a so-called face seal from an intermediate product having a circularly closed perimeter.

[0006] Japanese Unexamined Patent Application Publication No. 7-103337 describes manufacturing a seal ring by deep drawing a metal sheet ring and then performing high-frequency induction hardening. From U.S. Patent No. 10,746,301 and U.S. Patent Application Publication No. 2016 / 0369896, it is known to manufacture a so-called face seal by an additive manufacturing method. The ring-shaped body of the face seal includes two cross-sectional shapes alternately arranged along the circumferential direction, or a number of cross-sectional shapes that also vary. The face seal includes a first material from which the ring body is formed and a second material from which an outer seal layer (outer seal layer) is formed. 。 The ring-shaped sealing means disclosed in U.S. Patent No. 9,714,713 is manufactured from a thin metal sheet ring by punching or embossing. This sealing means includes a first support surface and a second support surface for a fitting O-ring, where these support surfaces are isolated from each other and spaced apart by at least one ring edge (a protruding annular ridge). 。 In the metal-to-metal seal for a special perforating tool known from U.S. Patent No. 4,824,123, two ring-shaped sealing means are manufactured from different metals respectively. 。 The seal disclosed in U.S. Patent Application Publication No. 2017 / 0335969 consists of two ring-shaped seal bodies formed substantially in the same manner, where the seal bodies are in contact with each other in the region of their respective contact surfaces. It is proposed to apply a coating compound to the support surface, where the support surface is located on the side opposite to the contact surface. An O-shaped flexible support ring (load ring) may be arranged on the support surface. 。 The ring-shaped sealing means disclosed in U.S. Patent No. 20,110,121,518 is rotatable about an axis via a cylindrical support surface, is slidably supported, and is manufactured by sintering from silicon carbide (SIC). This sealing means has an end face made of another material, where this end face has lower friction than the other parts of the sealing means. 。

[0007] The object of the present invention is to provide an improved hard seal ring, an improved sliding seal device, and an improved manufacturing method.

[0008] The above object is solved individually or in combination by a plurality of aspects. In this case, these aspects each have the meaning of an independent invention and bring both separate and synergistic advantages. Hereinafter, these aspects will be described individually and in specific combinations. However, these aspects may be used in any other combination. In particular, all sub-combinations of the separately disclosed aspects are assumed with respect to both the manufacturing method and the configuration of the hard seal ring and the sliding seal device.

[0009] The hard seal ring according to the present disclosure includes a ring body having a rotationally symmetric basic shape with respect to an axis. The ring body further has a contact portion in a cross section located in the direction of the axis. This contact portion is disposed on the end face of the ring body facing outward in the direction of the axis.

[0010] The contact portion is a functional region where a sliding surface of the hard seal ring is formed or is to be formed.

[0011] The ring body further has a groove portion in a cross section. The groove portion is disposed on the circumferential surface in the radial direction of the ring body and is located on the side opposite to the contact portion with respect to the direction of the axis.

[0012] The groove portion is a functional area where the support of the rigid seal ring against a machine part or a component is carried out, in particular via an additional soft seal ring. The groove portion may have any shape, in particular a shape of a complete groove with two defining parts or two lateral support areas, or a shape of a half groove with only one defining part or only one lateral support area. The additional soft seal ring is preferably coupled to the rigid seal ring and is arranged in the groove portion. The soft seal ring may be accommodated or inserted in the groove portion and may be supported, or may be supportable, by the defining part of the groove portion at least on one side, preferably on both sides.

[0013] In other words, the ring body has a macro shape of an annulus, and a formed cross-sectional shape with at least one contact part on the axial end face and a groove portion on the radial peripheral surface.

[0014] The ring body has a sliding coating on the contact part. The sliding coating can form the original sliding surface of the rigid seal ring. The sliding coating may be adapted to the desired application in terms of its properties. In this way, the ring body itself can be manufactured from a different or less demanding material with respect to, in particular, achievable hardness (surface hardness), wear resistance, mechanical (post) processability, elasticity, heat resistance, thermal conductivity, etc.

[0015] The sliding seal device according to the present disclosure includes a first rigid seal ring and a second rigid seal ring each having one contact part. In this case, these rigid seal rings are adjacent to each other along the axis at a predetermined mounting position and are coaxially arranged with respect to each other, whereby the contact parts are in contact with each other in the circumferential direction. At least one of the rigid seal rings preferably has a sliding coating on the contact part.

[0016] A sliding seal device is preferably used to seal in a contact zone between two rotatable components about an axis (A) so that no liquid and / or gas outflow occurs. In this case, each hard seal ring forms a circumferentially extending dynamic seal in the contact area between the contact parts (3). By this seal, a first section and a second section, which are radially adjacent to each other on both sides of the pair of hard seal rings, are isolated from each other. When the two components are rotated relative to each other, one hard seal ring is carried by one component and the other hard seal ring is carried by the other component, whereby a sliding contact occurs in the circumferential direction about the axis, together with a direct abutment and relative movement between the contact parts of the hard seal rings.

[0017] By providing a sliding coating on at least one contact part of the hard seal ring, the sliding characteristics can be accurately improved and the service life can be extended.

[0018] In a first independent aspect of the present disclosure, at least one of the ring bodies may be manufactured by being deformed from a short-cut starting material, which is bent into a ring shape and joined at both ends. The starting material may exist as a straight or bent material, especially as a material wound into a coil.

[0019] The hard seal ring according to the present disclosure may be defined by being manufactured in a specific method. The disclosure of a hard seal ring manufactured in a specific method also represents the disclosure of the manufacturing method itself, and vice versa. The manufacturing method may include one or more method aspects that have the significance of an independent invention by themselves. These method aspects are used in manufacturing and can be used alone or in any combination.

[0020] One embodiment of the first method for manufacturing a hard seal ring may include the following steps, namely: preparing a semi-finished product with an elongated or straight extension; deforming the semi-finished product, in particular roll forming, more particularly roll embossing, and forming an intermediate product with an open ring shape; and joining both ends of the intermediate product to form a ring body having a rotationally symmetric basic shape and a closed circumference with respect to the axis (A).

[0021] The above-described configuration and manufacturing form of the hard seal ring can be used alone or optionally in combination with providing a sliding coating. The above-described configuration and manufacturing form of the hard seal ring have the special advantage that a very diverse hard seal ring with an arbitrarily settable diameter can be manufactured with only one tool, in particular one set of roll embossing rollers. That is, there is no need to prepare separate tools or tool sets for each diameter variation or for each profiling variation.

[0022] The cross-sectional profile of the hard seal ring to be manufactured may also be variably settable using only one set of tools, for example, by adapting the relative spacing and orientation of the rollers and / or by adapting the arrangement order of the rollers.

[0023] One preferred improvement of the so-called manufacturing mode assumes that the semi-finished product has a body region that forms a contact portion in the (subsequent) ring body, and in this case, at least one first coating layer for the sliding coating has already been provided on this body portion of the semi-finished product before or during the formation of the ring body.

[0024] In another independent aspect of the present disclosure, the ring body may have a cavity in cross-section. The cavity may be located on the side opposite to the contact portion on the one hand and on the side opposite to the groove portion on the other hand. Based on the cavity, the ring body can be formed with a particularly small required amount of base material, especially in a state where the mechanical load resistance against torsion is the same or even increased. The wall portion of the ring body that defines the cavity and extends substantially perpendicular to the axial direction particularly causes reinforcement of the cross-section. The cavity may remain empty, or may be wetted with a lubricant or lubricant, for example, during a predetermined operation. This can significantly improve heat dissipation compared to solid materials. Alternatively or additionally, a filling body may be disposed in the cavity. The filling body may be a separate object. The filling body may be formed from the same base material as the ring body. This may be, for example, a support structure formed by an additive manufacturing process (3D printing) without a mold or by an additive manufacturing method. Alternatively or additionally, the filling body may have a material different from the base material of the ring body. The filling body may be formed from a particularly advantageous material and / or a material having a lower surface hardness. Alternatively or additionally, the filling body may be formed from a material having a higher thermal conductivity. Also alternatively or additionally, the filling body may contain a material that locally changes and particularly increases the rigidity (modulus of elasticity). The filling body may be a passive object. The filling body may alternatively be an active object or may contain an active object. The active object may be, for example, a sensor or an actuator.

[0025] By providing the cavity and optionally the filling body, the properties of the hard seal ring can be freely adjusted over a wide range with respect to surface hardness, elasticity, weight, thermal conductivity and cost without any special additional effort regarding the manufacturing tool. For forming the filling body, in particular various shapes of plastics and / or metals can be introduced into the cavity depending on the application.

[0026] The formation of the cavity is independent of whether the ring body or its intermediate product is formed by partial or total deformation processing or primary forming.

[0027] Another independent aspect of the present disclosure assumes a manufacturing method in which the ring body of the hard seal ring is formed (at least partially) by primary forming and has a ring shape that is uniform and has no circumferential joints. In the present disclosure, the term primary forming includes both die-bound manufacturing such as centrifugal casting, chill casting, or gravity casting, etc., and moldless manufacturing by additional material deposition (3D printing). Manufacturing by primary forming may be combined with the above-described manufacturing techniques by deformation processing. In particular, in the first step, a semi-finished product with an elongated or straight extension can be manufactured by primary forming, and then this semi-finished product can be deformed to form an intermediate product with an open ring shape. Furthermore, the above steps can be continuously implemented to manufacture a closed ring shape.

[0028] Alternatively, in another embodiment of the present disclosure, a closed ring body can also be directly formed by primary forming. Optionally, in another processing step, a groove portion can be formed by deformation processing.

[0029] Another manufacturing aspect of the present disclosure assumes the existence of at least the following manufacturing steps, namely: a step of preparing a negative mold with a forming contour, and a step of manufacturing a closed ring body by primary forming, in particular by casting, and more particularly by aluminum die casting. Thereby, the ring body has a rotationally symmetric basic shape with respect to the axis, and in the cross section located in the direction of the axis, it has a contact portion arranged on the outer end face in the direction of the axis (A), and a groove portion arranged on the circumferential surface in the radial direction of the ring body and located on the side opposite to the contact portion with respect to the direction of the axis.

[0030] In the negative type, a ring-shaped additive material that forms a sliding coating at the contact portion can be introduced before or during the primary forming process. Alternatively or additionally, an additive material that locally changes, particularly increases, the elastic modulus can be introduced.

[0031] Another independent aspect of the present disclosure assumes that a protective coating is provided on the radial surface portion located between the groove portion and the contact portion in the ring body, particularly on the radial peripheral surface of the collar. The protective coating may at least partially consist of the same material as the sliding coating at the contact portion. Alternatively, the protective coating may be formed of another material. The protective coating may be formed in a single layer or a multi-layer, particularly a two-layer. In practice, it has been found that in most cases at the mounting position, damage to the material in the region of the sliding coating or the contact zone limits the service life of the hard seal ring. However, in individual cases, foreign matter, particularly hard particles, also enters the region between the housing portion and the radial surface portion located between the groove portion and the contact portion in the ring body, particularly on the radial peripheral surface of the collar. By applying a protective coating to this region, the hard seal ring will be more durable against the mechanical effects of such foreign matter, which improves the failure prevention measures of the hard seal ring and enables a more accurate prediction of the achievable service time.

[0032] Another independent aspect of the present disclosure herein assumes that there are a plurality of surface portions with different adhesion promoting effects adjacent to each other in the axial direction on the radial peripheral surface of the ring body, particularly in the region of the groove portion. Preferably, the groove portion is provided with a surface portion defined in the axial direction, and this surface portion covers only a part of the groove portion. In this case, this surface portion has an adhesion promoting effect enhanced particularly by the presence of an adhesion promoting additive material and / or by the presence of an adhesion promoting surface structure with respect to a soft seal ring that can be fitted over it. The adhesion promoting additive material may be, for example, a coating material different from the base material of the ring body. The adhesion promoting surface structure may be, for example, a roughened portion or a surface texturing portion. The hard seal ring is supported by the soft seal ring at a predetermined mounting position. It has been found that if the soft seal ring has a local twist or incorrect position at the mounting position, there is a risk of malfunction or premature wear of the hard seal ring. Such a twist or incorrect position may occur, in some cases, when the hard seal ring is inserted into the housing. Due to the locally different adhesion promoting effects, particularly the improved adhesion promoting effect, in the above-described surface portion, the soft seal ring fitted over the groove portion performs a controlled and uniform rolling motion between the groove portion and the housing when inserted into the housing. Thereby, twisting of the soft seal ring is avoided and correct positioning at the mounting position is assisted or guaranteed. This also improves the failure prevention measures of the hard seal ring and enables a more accurate prediction of the achievable service life.

[0033] Another independent aspect of the present disclosure assumes that the sliding coating is formed in multiple layers and particularly has two or more separate coating layers overlapping in the axial direction. The multilayer configuration may have various forms that can be arbitrarily combined with each other both in terms of physical configuration and manufacturing form.

[0034] Alternatively or additionally, it may be assumed that the sliding coating has at least one stepped coating layer with a non-uniform material structure. The material structure of the stepped coating layer may have at least two zones, and more particularly a plurality of zones, in which different material mixtures and / or different concentrations of hard particles and / or self-lubricants are present, particularly in the cross-sectional and axial directions. That is, for example, a first zone located near the ring body in the axial direction may be provided with a high concentration of hard particles in order to produce permanent sliding characteristics. A second zone located away from the ring body in the axial direction, particularly the outer edge zone of the sliding coating, may have a high concentration of self-lubricant in order to produce conformability characteristics. There may be a gradual transition in the concentration of hard particles and / or self-lubricant between these zones. The gradual transition may be fluid or may be divided towards another intermediate zone.

[0035] In a first form, it is assumed that the sliding coating includes a wear-resistant permanent sliding layer and, on the other hand, a separate conformability layer. Preferably, the conformability layer is disposed so as to overlap the wear-resistant permanent sliding layer. Alternatively, the conformability layer may be provided adjacent to or overlapping the permanent sliding layer.

[0036] In another form, a first coating layer can be applied to a semi-finished or intermediate product that is joined to form a circumferentially closed ring body, in which case at least one other coating layer of the sliding coating is applied only after the joining.

[0037] In this way, at least one other coating layer can cover or conceal the joint in the circumferential direction. Preferably, somewhat low manufacturing error requirements may be provided for the deformation processing process for forming the ring body without adversely impairing the sealing action and rotational characteristics.

[0038] Another independent aspect of the present disclosure assumes that the trough portion has an intermediate region and at least one adjacent lateral support region, and the support region is located on the side of the intermediate region away from the contact portion in the axial direction, and in this case, this lateral support region is formed by a collar.

[0039] In a first form, the longitudinal extension length of the collar may be larger by a factor x than its thickness in the cross section, where x is at least 1.5, preferably 2 to 4. Thereby, the collar has a substantially flat and thin-walled hollow cylindrical shape, whereby the collar can be deformed by using simple means, and moreover, regardless of whether the ring body was initially manufactured by deformation or primary forming, further processing may be performed. The collar may particularly initially have a longitudinal extension length directed in the axial direction in the cross section. In other words, it may be an axial collar.

[0040] In another form that can be used alone or in combination with the above-described form, the lateral support region of the trough portion may be additionally bent or edge-bent during the manufacture of the ring body compared to the starting shape for a predetermined mounting position, whereby the longitudinal extension of the trough portion is inclined relatively strongly towards the trough portion in the cross section. This additional bending or edge-bending of the lateral support region, particularly the collar, can provide various advantages. On the one hand, it becomes possible to adapt the hard seal ring to various shapes of the soft seal ring, and via the soft seal ring, the hard seal ring can be supported by the component. Furthermore, by additionally deforming the lateral support region by bending or edge-bending, the effective width of the trough portion can be adapted or adjusted. That is, the hard seal ring can be accurately adapted for various application options with respect to pairing with one option of the soft seal ring.

[0041] In the above-described form, in the case of a ring body manufactured by primary molding, it is preferably accompanied by the formation of an undercut on the side of the side support region of the ring body opposite to the groove portion (5). The undercut is preferably provided such that the material thickness in the range of the side support region is significantly smaller than that in the intermediate region of the groove portion.

[0042] That is, in short, according to the present disclosure, in the highest compatibility of the hard seal ring with each application requirement, an advantageous mass production (die casting) is also possible, and a technology for providing a hard seal ring that enables a modular manufacturing possibility for individual members or small-quantity production for special applications is shown.

[0043] Other advantageous configurations of the present disclosure will be described in the dependent claims, the following description, and the accompanying drawings.

[0044] The present invention is schematically illustrated in the drawings.

Brief Description of the Drawings

[0045]

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[0046] In FIG. 1, one preferred embodiment of the sliding seal device (60) is shown at the assumed mounting position in the component group (100). The component group (100) includes a first component member (101) and a second component member (102) that are supported relative to each other around the axis (A). Here, for example, a rotary bearing (103), particularly a cylindrical roller bearing, is used for the support.

[0047] A gap (104) is formed between the component members (101, 102), and the gap (104) extends at least partially in a radial plane with respect to the axis (A). Through this gap (104), liquid or gas may move between the internal space and the external space of the component group (100). In order to prevent or limit such movement, a sliding seal device (60) according to the present disclosure is arranged between the component members (101, 102).

[0048] The sliding seal device (60) has a first hard seal ring (61) and a second hard seal ring (62). The first hard seal ring (61) and the second hard seal ring (62) are adjacent to each other along the axis (A) and coaxially arranged at the assumed mounting positions shown in the figure.

[0049] FIG. 2 shows an enlarged detailed view of the upper half of the sliding seal device (60) shown in FIG. 1.

[0050] At least one, preferably both, of the hard seal rings (61, 62) are formed according to the present disclosure. Such a hard seal ring (61, 62) includes a ring body (2, 2'), and this ring body (2, 2') has a basic shape that is rotationally symmetric with respect to the axis (A). The ring body has a contact portion (3) arranged on one end face of the ring body (2, 2') in a cross-section (Q) located in the direction of the axis (A). In this case, this contact portion (3) faces outward in the direction of the axis (A). Further, the ring body (2, 2') includes a groove portion (5) in the cross-section (Q), and this groove portion (5) is arranged on the radial peripheral surface of the ring body (2, 2') and is located on the side opposite to the contact portion (3) with respect to the direction of the axis (A). In the examples shown in FIGS. 1 to 7, the groove portion (5) is arranged on the radially outward peripheral surface of the ring body (2, 2'). FIG. 10 shows an alternative embodiment in which the groove portion (5) is arranged on the radially inward peripheral surface of the ring body (2, 2').

[0051] The ring body (2, 2') has a sliding coating (8) on the contact portion (3). The sliding coating (8) may be formed in a single layer or preferably in multiple layers. The sliding coating (8) may particularly have two or more separate coating layers (9, 10) that at least partially overlap in the direction of the axis (A).

[0052] The constituent members (101, 102) may be provided with seal accommodation portions (105, 106) formed appropriately as desired. The seal accommodation portions (105, 106) may have, for example, the basic shape of a ring groove with an obliquely inclined peripheral surface. Alternatively, the seal accommodation portions (105, 106) may be formed differently as desired.

[0053] The sliding seal device (60) according to the present disclosure preferably includes at least one, more preferably two soft seal rings (63, 64). The soft seal rings may have, for example, the shape of an O-ring (Figs. 1 to 7) or a trapezoidal ring (see Figs. 10 to 11). The soft seal rings (63, 64) are used on the one hand to support one hard seal ring (63, 64) each within the attached seal accommodation portions (105, 106) of the constituent members (101, 102), and on the other hand to statically seal between the constituent members (101, 102) and the hard seal rings (63, 64).

[0054] Upon relative rotation between the respective constituent members (101, 102), one of the hard seal rings (63, 64) is carried along during the rotational movement of each constituent member (101, 102). That is, in the circumferential direction, the relative movement between each hard seal ring (63, 64) and the constituent member (101, 102) hardly occurs or occurs only to an extremely small extent.

[0055] However, the hard seal rings (63, 64) extend in the circumferential direction and are in contact with each other through the respective contact portions (3), whereby an abutting region (65) closed by body contact is formed between the hard seal rings (63, 64) and, more particularly, between the respective contact portions (3).

[0056] As a result, when the components (101, 102) move, the hard seal rings (63, 64) are in circumferential contact and slide to form a seal barrier in the contact area (65). This barrier separates the first compartment (107) from the second compartment (108), and the first compartment (107) and the second compartment (108) are located on the outside and inside of the sliding seal device (60) adjacent to each other in the radial direction, respectively. In the examples of FIGS. 1 and 2, the first compartment (107) is formed outside the sliding seal device (60) in the radial direction and between the end faces of the respective components (101, 102) in the axial direction. The first compartment may be the same as the gap (104) or may communicate with the gap (104).

[0057] The second compartment (108) is formed inside the sliding seal device (60) in the radial direction.

[0058] At least one of the compartments can preferably accommodate a lubricant and / or a coolant, such as transmission oil or another common lubricant. When each hard seal ring (63, 64) moves relative to each other, this lubricant and / or coolant is preferably entrained by body contact and distributed to the contact portion (3) or the sliding coating (8). Alternatively, the sliding seal device may exist as a non-lubricated coating.

[0059] Next, various configurations of the hard seal ring (1) that can be combined with each other in any form will be described. In particular, within the sliding seal device, two different hard seal rings (1) or two identical hard seal rings (1) may be combined.

[0060] FIG. 3 shows an exploded view of a sliding seal device (60) according to a first embodiment.

[0061] In this example, each hard seal ring (1) has a multi-layer sliding coating (8). The sliding coating (8) consists of a first coating layer (9) directly applied to the ring bodies (2, 2’), particularly to the contact portion (3). Furthermore, the sliding coating (8) includes a second coating layer (10) applied so as to overlap the first coating layer (9). The second coating layer may preferably completely cover the first coating layer in the circumferential and / or radial directions. Alternatively, only partial coverage may be assumed. The sliding coating (8) preferably has a wear-resistant permanent sliding layer (11), which may also be referred to as a sliding layer. The permanent sliding layer (11) is particularly preferably the first coating layer (9). In one preferred configuration, the sliding coating (8) and particularly the sliding layer (11) have a hardness (Vickers hardness) of at least 400 HV, and more particularly greater than 700 HV or greater than 800 HV.

[0062] The permanent sliding layer (11) may have any structure and may be manufactured in any form. Particularly preferably, the permanent sliding layer (11) is formed by a metal-matrix composite material containing a bonded matrix with hard particles embedded therein. The embedded hard particles are one or more of the following substances, namely: · Carbides, particularly metal carbides, and more particularly ○ Chromium carbide, ○ Iron carbide, ○ Tungsten carbide, ○ Titanium carbide, ○ Silicon carbide, · Oxides, particularly metal oxides, and more particularly ○ Aluminum oxide, ○ Zirconium oxide, · Nitrides, particularly metal nitrides, and more particularly ○ Boron nitride and may contain at least one or more of them.

[0063] The bonding matrix may preferably be formed from nickel base and / or nickel-chromium base and / or cobalt base and / or iron base.

[0064] In one another preferred configuration that can be combined with the above features, the permanent sliding layer (11) may contain an additional self-lubricant, and this self-lubricant is particularly the following substances, namely: · Molybdenum, · Copper, · Molybdenum sulfide, · Bronze, · Brass, · Graphite, · Boron nitrite (particularly hexagonal boron nitrite), · PTFE at least one of these, or includes these compounds.

[0065] The separate conforming layer (12) may preferably contain graphite, or a soft metal such as copper, zinc, tin or aluminum. The soft metal may be contained in pure form or as an alloy. Alternatively or additionally, the conforming layer (12) may contain graphite, or a soft metal such as lead, copper, zinc, tin or aluminum in a metal matrix, for example, may contain graphite in a nickel matrix, or may contain lead in a nickel matrix.

[0066] The conforming layer (12) may be locally removed relatively rapidly in the contact region (65) at the start of use of the sliding seal device, whereby a surface portion that extends completely flat with respect to each other is formed on each of the contacting hard seal rings (61, 62). By removing the conforming layer, the hard seal rings (61, 62) can further approach each other microscopically in the axial direction (A), whereby the wear-resistant permanent sliding layer (11) having a significantly high dynamic stability located behind them will gradually come into contact with each other.

[0067] In the exemplary diagrams shown in FIGS. 5 and 7, the contact portion (3) may be inclined by a predetermined angle (W) with respect to the axis (A) in the cross-section (Q), and in this case, this angle (W) is preferably 80° (angle) to 89.5°, or the angle (W) is 90.5° to 100°. In other words, this inclination angle preferably differs from a right angle by a predetermined minimum dimension.

[0068] Accordingly, each contact portion (3) is preferably positioned as mutually slightly inclined surfaces in the contact region (65) at a predetermined mounting position, and a small opening angle, particularly preferably in the range of 0.5 degrees to 3 degrees, remains between these surfaces. Alternatively, this opening angle may be larger.

[0069] Due to this opening angle, it is achieved that as the service period elapses and with the corresponding wear of the sliding coating (8), each hard seal ring (61, 62) can approach each other more and more microscopically along the axis (A). In this case, the contact region (65) between each contact portion (3) is displaced radially inward or radially outward according to the selected angle (W). In the example shown in FIG. 2, the contact region (65) is formed radially outward between each contact portion (3) at the start of use and gradually moves radially inward. In the example shown in FIG. 11, the reverse case exists.

[0070] The ring bodies (2, 2') may basically be formed from any deformable or primary formable material. Particularly preferably, the ring bodies (2, 2') are formed from a metallic material, and more preferably from an aluminum or iron material. The choice of material may depend on the intended application. Alternatively or additionally, the ring bodies (2, 2') may be formed from plastic. Furthermore, for example, manufacturing by a shaping composite material forming method that forms a fiber composite by lamination is possible.

[0071] The ring bodies (2, 2’) preferably have a color (13) in the groove portion (5) on the side facing the contact portion (3) in the cross-section (Q). The color (13) may particularly be a ring color, and more particularly a radial ring color. The color (13) may be connected to the supporting region (17) on the side of the groove portion (5), or may exist separately. The color (13) may preferably be used to form only a narrow annular gap with respect to the corresponding seal receiving portions (105, 106) at a predetermined mounting position, thereby preventing or restricting the intrusion of foreign matter from the compartment (107) into the groove portion (5) and preferably the soft seal rings (63, 64) arranged therein.

[0072] The groove portion (5) of the ring bodies (2, 2’) preferably has an intermediate region (16) with a flat contour in the cross-section (Q), in which case the intermediate region (16) forms a seating surface for mounting the soft seal rings (63, 64). The intermediate region (16) may have a position inclined with respect to the axial direction (A). The inclination of the intermediate region (16) with respect to the axis (A) may particularly be 1° (angle) to 30°, or optionally more. Alternatively, the intermediate region (16) may be oriented parallel to the axis (A).

[0073] Furthermore, the groove portion (5) preferably has, in the cross-section, the intermediate region (16) and at least one lateral supporting region (17, 18) directly adjacent thereto. Figures 5, 7 and 9 show further details regarding the shaping of the groove portion.

[0074] The groove portion (5) may have a (first) lateral supporting region (17), and the (first) lateral supporting region (17) is located on the side of the intermediate region (16) facing the contact portion (3) in the direction of the axis (A). The groove portion (5) may alternatively or additionally have a (second) lateral supporting region (18), and the (second) lateral supporting region (18) is located on the side of the intermediate region (16) remote from the contact portion (3) in the direction of the axis (A).

[0075] The movement range of the flexible seal rings (63, 64) is restricted by the support regions (17, 18) on one or both sides, or a contact surface is formed, and through this contact surface, the support force can be transmitted or supported between the component members (101, 102) or the seal housing parts (105, 106) and the rigid seal rings (61, 62) in the direction of the support force in the direction of the axis (A) via the flexible seal rings (63, 64).

[0076] Correspondingly, at least one lateral support region (17, 18) is preferably inclined with respect to the intermediate region (16), particularly in the case of an obtuse inclination angle (N1, N2). Alternatively, there may be other values of the inclination angle (N1, N2), particularly a right angle.

[0077] The longitudinal extent length (L) of the second lateral support region (18) located on the side of the intermediate region (16) far from the contact portion (3) in the direction of the axis (A) and the strength of the inclination (N1, N2) considerably affect the diversity of the variations of the soft seal rings (63, 64) available with each hard seal ring (61, 62). On the other hand, the selection of the soft seal rings (63, 64) is often influenced by the use conditions and the available configuration space. Therefore, it is advantageous to form the groove portion (5) at least conformably within the range of the (second) lateral support region where shape changes are allowed. The shape change can be achieved in particular by the (second) lateral support region (18) being formed by the collar (22) (see FIGS. 6 to 9). This collar (22) may preferably have a longitudinal extent length (L) that is greater by a factor x than its thickness (D) in the cross-section (Q), i.e., L = x × D. In this case, the factor x is at least 1.5, more preferably 2 to 4. In particular, it may be assumed that the hard seal ring is adapted to a specific application in which the collar (22) is deformed. Particularly preferably, the (second) lateral support region (18) may be additionally bent or edge-bent compared to the starting shape for a predetermined mounting position, whereby its longitudinal extent length (L) is inclined more strongly (than at the starting position) towards the groove portion (5) in the cross-section (Q). In the example shown in FIG. 9, the ring body (2) is formed by deformation processing, in particular by a method of roll embossing the semi-finished product (40), which will be described in more detail below. In this case, the (second) lateral support region (18) is formed as an axial collar (22) in the starting shape, and its longitudinal extent length (L) extends in the direction of the axis (A) in the cross-section (Q) or is directed collinearly with the extension of the intermediate region (16). From this starting shape, the collar (22) can be deformed by subsequent deformation processing steps to a position that is also more strongly inclined towards the groove portion (5) as shown in FIG. 9.

[0078] In the example shown in FIG. 7, a ring body (2') formed by primary molding, in particular by casting a metallic material, and more particularly by aluminum die casting, is shown. In this case, the ring body (2') has an undercut (21) on the side of the (second) lateral support region (18) opposite to the groove portion (5), whereby a collar (22), in particular an axial collar (22) having a thin-walled hollow cylindrical basic shape, also remains. In this case, the longitudinal extent (L) of this axial collar (22) is preferably oriented parallel to the axis (A). This has the special advantage that the negative mold for the primary molding production of the ring body can be formed particularly simply and enables processing and shaping in the direction of the axis (A). Thereby, the cost of the mold can be significantly reduced.

[0079] (Second) lateral support region (18) may preferably be provided with a rounded sliding surface (19), which helps to fit the soft seal rings (63, 64) without damage.

[0080] The transition between the intermediate region (16) and at least one lateral support region (17, 18) may have any shaping. The presence of a rounded transition in the cross-section (Q) between the intermediate region (16) and at least one lateral support region (17, 18) is advantageous, for example, for the use of soft seal rings (63, 64) having a circular cross-sectional shape, in particular for the use of O-rings. This shaping is shown in various configurations in each figure. Alternatively, an angular or stepped transition may be present (not shown).

[0081] The position, radius and arc length of the rounded transition may preferably be adjustable. If the entire ring body (2) is produced by deformation, this adjustment can be made in particular during the production process based on the configuration or position and in particular the relative positions of the production means, in particular the embossing roller or the edging tool. If the ring body (2') is produced by one-time molding, adjustment is possibly only possible for the (second) lateral support area (18) on the side opposite the contact area (3).

[0082] The rigid seal ring according to the present disclosure may preferably include a ring body (2, 2') having a cavity (14) in a cross-section (Q). The cavity (14) may have any desired shape and location. The cavity (14) is preferably formed as a semi-open hollow or semi-hollow space located mainly or completely within the cross-section of the ring body, the hollow or semi-hollow space being located on the side opposite the contact portion (3) on the one hand and on the side opposite the trough portion (5) on the other hand. In other words, the ring body (2, 2') preferably has a cavity (14) located adjacent to the contact portion (3) on the one hand and adjacent to the trough portion (5) on the other hand in the cross-section (Q), isolated from the contact portion (3) and the trough portion (5) by portions of the walls of the ring body (2, 2'), respectively.

[0083] The cavity 14 may remain empty in its intended installation position or may be partially or completely filled with a filler 15. The filler 15 may be made of any material and may have any desired shape. The filler 15 may serve one or more purposes, such as reinforcement, improving thermal conductivity, or assisting in the supply or removal of lubricants and / or coolants. The improvement of thermal conductivity and / or the supply or removal of lubricants and / or coolants may be particularly advantageously utilized to remove thermal energy, which is generated during operation, particularly in the contact area 65, and which may be removed through the wall area of the adjacent ring body 2, 2'.

[0084] The cavity (14) may be formed regardless of the manufacturing type of the ring body (2, 2’). The shaping part of the cavity (14) may be adapted to each application.

[0085] In FIGS. 1 to 5 and FIGS. 10 to 12, examples are shown in which the cavity (14) is partially or completely surrounded by the ring body (2, 2’) in the cross section (Q). In FIGS. 7 and 9, examples are shown in which the cavity (14) is provided as a semi-hollow space that is only partially surrounded by the ring body (2, 2’).

[0086] In the example shown in FIG. 5, a ring body (2) formed by deformation processing from a semi-finished product (40) is shown. The semi-finished product (40) was once a flat material with a hollow space and circular or ring-shaped in the cross section (Q’) (see FIG. 14C).

[0087] In this case, the cavity (14) deeply penetrates into the bending portion formed between the contact portion (3) and the groove portion (5) within the region of the ring collar (13). In this case, a filling body (15) is introduced into the cavity (14), and the filling body (15) is formed of a highly thermally conductive metal such as copper or tin, for example. The filling body (15) may be produced, for example, by centrifugal high-temperature soldering. The filling body (15) is used on the one hand to mechanically support between the contact portion (3) and the groove portion (5), and on the other hand, it can greatly promote heat dissipation, which also brings great advantages in the service life.

[0088] The color (13) is provided with a protective coating (25) as an optional configuration. The protective coating (25) may be formed as a single layer or multiple layers. In the illustrated example, the protective coating is two layers and includes a first (inner) layer (25a). The first (inner) layer (25a) may preferably be made of a hard and wear-resistant material. The first layer (25a) may particularly be made of the same material as the first coating layer (9) at the contact portion (3). The protective coating (25) further includes a second (outer) layer (25b) in the illustrated example. This second layer (25b) may preferably be made of a material different from the first layer (25a), particularly a relatively soft material. Further, the second layer (25b) may have specific supplementary material properties such as enhanced corrosion resistance with respect to the first layer (25a) or the base material of the ring body (2, 2’), or enhanced resistance to specific assumed foreign substances such as acids or alkalis. The second layer (25b) may optionally be made of the same material as the second coating layer (10) at the contact portion (3).

[0089] In one preferred configuration, the sliding coating (8) at the contact portion (3) and the protective coating (25) on the color (13) have the same material and layer composition.

[0090] The protective coating (25) and the sliding coating (8) may be applied separately or in a single common step. The protective coating (25) and the sliding coating (8) may further be clearly defined from each other materially or formed to merge with each other. This may apply selectively to only a part of the layers (25a, 25b) of the protective coating or only a part of the layers (9, 10, 11, 12) of the sliding coating in some cases.

[0091] In the example shown in FIG. 5, the protective coating (25) in the color (13) and the sliding coating (8) in the contact portion (3) transition into each other in the region of the peripheral portion of the ring bodies (2, 2') located therebetween. In another example shown in FIG. 9 or FIG. 12, the protective coating (25) in the color (13) and the sliding coating (8) in the contact portion (3) exist separately, and there is no direct material transition portion between the two.

[0092] In one alternative configuration, the protective coating (25) may be arranged on another radial surface portion of the ring bodies (2, 2'), in which case this radial surface portion is located between the groove portion (5) and the contact portion (3). As shown in FIGS. 5 and 9, the radial surface portion may face outward of the ring bodies (2, 2'), or as shown in FIG. 12, may face inward of the ring bodies (2, 2').

[0093] The cross-sectional view shown in Fig. 5 shows another preferred configuration of one of the hard seal rings. Here, on the radially circumferential surface of the ring body (2, 2'), more precisely in the region of the groove portion (5), surface portions (27, 28) with different adhesion-promoting effects, which are adjacent to each other in the axial direction (A), are provided. The groove portion (5) may be provided with a (first) surface portion (27) defined particularly in the axial direction (A), and the (first) surface portion (27) covers only a part of the groove portion (5). In this case, this surface portion (27) has an enhanced adhesion-promoting effect on the soft seal ring (63, 64) that can be fitted over it. The surface portion (27) with the enhanced adhesion-promoting effect may be provided in any form, particularly by adding an additive material (29) that promotes adhesion and / or by providing a surface structure that promotes adhesion. The groove portion (5) may further be provided with a (second) surface portion (28) defined in the axial direction (A), and the (second) surface portion (28) has different surface characteristics. This other surface portion (28) may particularly have an enhanced seal-promoting effect on the soft seal ring. The enhanced seal promotion may likewise be provided in any form, particularly by adding an additive material (30) that promotes the sealing effect and / or by providing a surface structure that promotes the sealing effect.

[0094] Figures 15 and 16 illustrate one preferred procedure for inserting the rigid seal ring (62) together with the flexible seal ring (64) covering the groove portion (5) into the seal accommodation portion (106) in the housing (102). The groove portion (5) of the rigid seal ring (62) may preferably be provided with a circumferential groove (26), which is shown in an enlarged form in FIG. 5. The circumferential groove (26) may have any configuration. The circumferential groove (26) may particularly preferably be arranged between the intermediate region (16) of the groove portion (5) and the lateral support region (18) located away from the contact portion (3). More preferably, the intermediate region (16) and / or the lateral support region (18) may be inclined with respect to the axial direction (A). In the circumferential groove (26), there are local extreme values of the diameter of the circumferential surface along the axis (A) in the cross section (Q). Thereby, the flexible seal ring that is slightly stretched compared to the basic shape of the flexible seal ring and fitted over the rigid seal ring (2, 2', 62) may be pushed back to an advantageous position along the circumferential groove (26) based on its elastic return deformation. In the examples shown in FIGS. 5, 7, 9, and 15, the circumferential groove (26) is formed by a local minimum of the diameter of the circumferential surface on the radially outer surface of the ring body. In the example shown in FIG. 12, the circumferential groove (26) is formed by a local maximum of the diameter of the circumferential surface on the radially inner surface of the ring body.

[0095] The flexible seal ring (64) can be fitted over the groove portion (5), particularly along the circumferential groove (26), in a pre - mounting step, thereby removing any twist. To assist in twist - free fitting and rapid position inspection, the flexible seal ring may optionally have circumferential line markings (66), which are recognized as circular lines on the outer surface, particularly in the non - deformed state of the flexible seal ring. In FIG. 15, the circumferential line markings (66) are arranged on the radially outer surface of the flexible seal ring (64) and indicate the maximum circumference of this seal ring.

[0096] At the pre-mounted position shown, it is possible to check at a glance whether the soft seal ring is fitted over the hard seal ring without torsion over the extent of the circumferential line marking (66). If the soft seal ring is fitted over the hard seal ring without torsion, the hard seal ring can be inserted into the component (102) as in the transition from the left figure to the right figure in Fig. 15. During this insertion, it is desirable that a rolling motion occurs in which the soft seal ring rolls without slipping on the one hand on the surface of the groove portion (5) and on the other hand on the surface of the seal receiving portion (106) in the component (102), whereby the seal ring forms the same rolling angle (Z) along its circumferential surface at any location.

[0097] The above-described configuration of the groove portion (5) with surface portions (27, 28) having different adhesion-promoting actions adjacent to each other in the axial direction (A) promotes this uniform rolling motion.

[0098] FIG. 16 shows another movement of the soft seal ring (64) that can occur during the manufacture of the seal pair based on the (predetermined) final position shown in FIG. 6. In this case, the hard seal ring (62) is further pushed into the seal receiving portion (106) in the component member (102) in the axial direction (A). Also in this case, it is desirable for the soft seal ring (64) to perform a rolling movement. In this case, the soft seal ring (64) again rolls without slipping, on the one hand on the surface of the groove portion (5) and on the other hand on the surface of the seal receiving portion (106) in the component member (102). This is shown by the transition from the left figure to the right figure in FIG. 16. During this rolling movement, the soft seal ring (64) may optionally be additionally elastically compressed. The attempt of the soft seal ring (64) to return to its original body shape creates an elastic support force between the hard seal ring (62) and the seal receiving portion (106) in the component member (102). The more uniform the rolling angle (Z) that can be formed along the circumferential direction of the soft seal ring (64), the more uniformly the support force for the hard seal ring (62) is formed, which also promotes uniform and thus long-lasting contact in the region of the sliding surface (9) at the contact portion (3).

[0099] In the rolling movement shown in FIG. 16, the soft seal ring (64) can be displaced relative to the groove portion (5) along the intermediate region (16) of the groove portion (5). Due to this displacement, the main body contact between the soft seal ring (64) and the hard seal ring (62) no longer occurs at the surface portion (27) where the adhesion promoting action is enhanced, but at the surface portion (28) adjacent to this surface portion (27) and preferably where the seal promoting action is enhanced.

[0100] The above-described configurations of the soft seal ring (64) and the hard seal ring (62), either individually or in combination, facilitate the achievement of non-twisted pre-installation and final installation of the soft seal ring. Further, via the circumferential line markings (66) on the soft seal ring (64), the non-twisted state of the soft seal ring (64) and the proper support of the hard seal ring (62) resulting from this state can be inspected visually or using simple visual means, both in the pre-installation state shown in FIG. 15 and at the final assembly / manufacture of the seal pair shown in FIG. 16. This can effectively reduce or completely eliminate installation errors and the resulting impairment of the service life.

[0101] The ring bodies (2, 2') may have one or more openings (23, 24) along the circumferential direction (U). These openings (23, 24) may be introduced separately or may result from the manufacturing method or the original shape of the semi-finished product (40).

[0102] FIG. 4 illustrates a slit-shaped opening (24) continuous in the circumferential direction (U) and various local openings (23). The openings (23, 24) penetrate the wall of the ring bodies (2, 2') and preferably open into the cavity (14). These openings (23, 24) are preferably arranged outside the contact portion (3) and outside the groove portion (5). The openings (23, 24) can be used, on the one hand, to provide an inlet for introducing the filling body (15). On the other hand, the openings (23, 24) can contribute to the facilitation of the supply or discharge of lubricant and / or coolant and can in particular generate a pumping action during the relative movement of the hard seal rings (61, 62).

[0103] Figures 8 and 13 schematically illustrate one preferred method of manufacturing a hard seal ring according to the present disclosure. This method includes the steps of preparing a semi-finished product (40) with an elongated extension, deforming the semi-finished product (40), particularly roll forming, more particularly roll embossing, and forming an intermediate product (44) with an open ring shape, and joining both ends (45) of the intermediate product (44) to form a ring body (2) having a rotationally symmetric basic shape and a closed circumference (U) with respect to the axis (A).

[0104] The deformation process, particularly roll forming or roll embossing, can be particularly preferably carried out by arranging a plurality of rolls (41, 42, 43), particularly embossing rolls or embossing rollers. At least a part of the rolls (41, 42) preferably has a forming part such that a part of the cross-sectional forming part of the ring body (2) is formed during the deformation process. One or more additional rolls (43) may be provided to additionally guide the semi-finished product or the intermediate product and / or to provide supplementary adaptation to the forming rolls. In the example shown in Figure 8, an upper roll (41) and a lower roll (42) are provided which are shaped such that a cross-sectional forming part of a groove part (5) with an intermediate region (16) and a first lateral support region (17) and a transition to the ring collar (13) are set. Another embossing roll (43) which can be fed in laterally is used to position the body region of the semi-finished product (40) which forms the contact part (3) in the (subsequent) ring body (2), and in particular to adjust the inclination angle (W) with respect to the axis (A).

[0105] In this body region, at least one first coating layer (9) for the sliding coating (8) may already be provided in the semifinished product (40), i.e., before the shaping process. Thereby, it is possible to use a semifinished product prepared as a bar stock already coated with the sliding coating (8), which results in significant cost savings. The joining of the two ends (45) of the intermediate product (44) can be carried out in any form, particularly preferably by laser welding, and even more preferably, the welding energy can be introduced from the side opposite to the contact portion (3) on the one hand and / or from the side opposite to the groove portion (5) on the other hand. In other words, it is preferably assumed that the welding energy is introduced into the material of the ring body (2) from the side with the semi-open cavity (14), thereby causing minimal damage to the already applied sliding coating (8). In this way, a particularly high coplanarity can be achieved between the end regions of the locally contacting portions (3) that are butted against each other at the two ends (45) of the intermediate product (44) to be connected. Alternatively, the introduction of the welding energy may be carried out from the other side, particularly from the side opposite to the cavity (14) in the radial direction.

[0106] The coplanarity can be further enhanced by applying another coating layer (10) so as to overlap the first coating layer (9) after the joining of the two ends (45). This another coating layer (10) may particularly be an adhesion layer (12). Alternatively or additionally, a wear-resistant permanent sliding layer (11) or an additional sliding layer (11) may be applied. In other words, the other coating layers (10, 11) are applied to the ring body (2) with a closed perimeter (U).

[0107] At least one of the coating layers (9, 10) of the sliding coating (8) can be applied in any form. Particularly preferably, by the following methods, namely: · Spraying, particularly ○ High-velocity flame spraying, ○ Arc spraying, ○ Plasma spraying, · Laser alloying, · In particular, build-up welding using a laser or an arc, · Vapor deposition, in particular ○ Physical vapor deposition, ○ Chemical vapor deposition at least one of which is used.

[0108] For the manufacturing method using deformation processing, any semi-finished product (40) can be used. This may be, for example, the flat material shown in Fig. 14A, in particular a flat metal strip or a thin metal sheet strip.

[0109] Alternatively, the semi-finished product (40) may be a pre-formed material, in particular a flat material pre-formed in the cross-section (Q’) (see Fig. 7).

[0110] Also alternatively, the semi-finished product (40) may be a flat material bent in the cross-section (Q’), in particular a bent metal forming material or a thin metal sheet forming material, more particularly an L-shaped forming material or a U-shaped forming material (see Fig. 14B).

[0111] Also alternatively, the semi-finished product (40) may be a flat material having a rounded or annular hollow space in the cross-section (Q’), in particular a tube forming material having a closed or open circumference (see Figs. 14C, 1 to 5), more particularly a round tube forming material or a rectangular tube forming material.

[0112] The modifications of the present invention are possible in various forms. In particular, all features, aspects and forms shown, described or claimed within the framework of this disclosure can be combined with each other in any form or can be alternatives to each other.

[0113] Alternatively or additionally to the above method steps, at least one of the coating layers (9, 10) is the following step, namely: The step of locally heating the material surface of the contact portion (3) until it exceeds the melting temperature, the step of alloying graphite, and the step of cooling the material surface of the contact portion (3) to below the austenitizing temperature, particularly by impact cooling, may be assumed to be deposited.

[0114] The ring body according to the present disclosure may be formed by any manufacturing method. Alternatively or additionally to the deformation processing and primary forming methods specifically described, in order to manufacture the ring body and / or the filling body and / or the sliding coating, the following methods, namely: · Forming without a mold by additional material deposition, particularly 3D printing by depositing a material present as a powder, filament or liquid material, · Forming without a mold by additional material deposition, particularly 3D printing by selective laser melting (SLS) or multi-jet fusion (MJF), · Mold-bound primary forming particularly by drop forging, chill casting, centrifugal casting, gravity casting, precision casting, sintering at least one of which may be used.

Explanation of reference numerals

[0115] 1 Hard seal ring / sliding hard seal ring 2 Ring body 2’ Ring body 3 Contact portion 4 End face 5 Groove portion 6 Radial peripheral surface (outward) 7 Radial peripheral surface (towards the center) 8 Sliding coating 9 First coating layer 10 Second coating layer 11 Sliding layer 12 Adhesion layer 13 Color / ring color / radial ring color 14 Cavity 15 Filling body 16 Intermediate region / seating surface 17 First lateral support region 18 Second lateral support region 19 Sliding surface 20 Rear wall 21 Undercut 22 Color / axial color 23 Opening (local) 24 Opening (extending circumferentially) 25 Protective coating 25a Protective coating, first layer 25b Protective coating, second layer 26 Circumferential groove 27 Surface part / adhesion promoting part 28 Surface part / sealing promoting part 29 Additive material for promoting adhesion 30 Additive material for promoting sealing 40 Semi-finished product 41 Roller / embossing roll 42 Roller / embossing roll 43 Roller / embossing roll 44 Intermediate product 45 End / end-side end face 60 Sliding seal device 61 First hard seal ring 62 Second hard seal ring 63 First soft seal ring 64 Second soft seal ring 65 Contact region 66 Circumferential line marking 100 Component group 101 First component 102 Second component 103 Rotary bearing 104 Gap 105 Seal housing 106 Seal housing 107 First compartment 108 Second compartment 109 Circumferential groove A Axis / axial direction D Thickness (material thickness in the lateral support region) L Length extending in the longitudinal direction (length of the lateral support region) N1 Inclination angle N2 Inclination angle Q Cross-section of the ring body, position in the direction of axis A Q’ Cross-section of the semi-finished product R Radial direction W Angle (between the contact part / end face and the axis) Z Rolling angle of the soft seal ring during insertion into the seal housing

Claims

Claim 1 A hard seal ring, comprising a ring body (2, 2') having a rotationally symmetric basic shape with respect to an axis (A), in a cross-section (Q) located in the direction of the axis (A), the ring body has a contact portion (3) disposed on one end face of the ring body (2, 2'), and the contact portion (3) faces outward in the direction of the axis (A), the ring body (2, 2') has a groove portion (5) in the cross-section (Q), the groove portion (5) is disposed on the circumferential surface in the radial direction of the ring body (2, 2'), and is located on the side opposite to the contact portion (3) with respect to the direction of the axis (A), the groove portion (5) is provided with a surface portion (27) defined in the direction of the axis (A), the surface portion (27) covers only a part of the groove portion (5), and the surface portion (27) has an enhanced adhesion promoting effect on a soft seal ring (63, 64) that can be fitted over it, In the hard seal ring, the ring body (2, 2') has a sliding coating (8) on the contact portion (3), and in the ring body (2, 2'), a protective coating (25) is provided on the radial surface portion located between the groove portion (5) and the contact portion (3). A hard seal ring, characterized in that. Claim 2 The hard seal ring according to claim 1, wherein surface portions (27, 28) with different adhesion promoting effects are provided on the circumferential surface in the radial direction of the ring body (2, 2') adjacent to each other in the direction of the axis (A). Claim 3 The ring body (2, 2') has a cavity (14) in the cross-section (Q), the cavity (14) is located on the side opposite to the contact portion (3) on the one hand, and on the side opposite to the groove portion (5) on the other hand. The hard seal ring according to claim 1 or 2. Claim 4 The ring body (2, 2') has a collar (13) on the side of the contact portion (3) at the location of the groove portion (5) in the cross-section (Q), and the protective coating (25) is provided on the circumferential surface in the radial direction of the collar (13). The hard seal ring according to claim 1 or 2. Claim 5 The sliding coating (8) includes an abrasion-resistant permanent sliding layer (11), and the permanent sliding layer (11) is formed of a metal-matrix composite including a binding matrix in which hard particles are embedded. The hard seal ring according to claim 1 or 2.

6. The sliding coating (8) includes an abrasion-resistant permanent sliding layer (11). The hard seal ring according to claim 1 or 2.

7. The sliding coating (8) includes a separate conforming layer (12). The hard seal ring according to claim 1 or 2.

8. The sliding coating (8) has at least one stepped coating layer with a non-uniform material structure, and the material structure of the stepped coating layer has at least two zones in which different material mixtures and / or different concentrations of hard particles and / or self-lubricants are present in the directions of the cross-section and the axis respectively. The hard seal ring according to claim 1 or 2.

9. The protective coating (25) consists of at least partially the same material as the sliding coating (8) at the contact portion (3). The hard seal ring according to claim 1 or 2.

10. The ring body (2, 2') is formed of a metallic material and / or is formed of a plastic. The hard seal ring according to claim 1 or 2.

11. The ring body (2, 2') and / or the sliding coating (8) is manufactured by formless primary molding by additional material deposition. The hard seal ring according to claim 1 or 2.

12. The groove portion (5) has an intermediate region (16) with a flat contour in the cross-section (Q), and the contour forms a seating surface for attaching the soft seal rings (63, 64). The groove portion (5) has a lateral support region (18), and the lateral support region (18) is located on the side of the intermediate region (16) far from the contact portion (3) in the direction of the axis (A). A circumferential groove (26) is formed between the lateral support region (18) and the intermediate region (16) of the groove portion (5), and a local maximum of the diameter of the circumferential surface exists in the extension of the axis (A) in the circumferential groove (26). The hard seal ring according to claim 1 or 2.

13. A sliding seal device, comprising at least one first hard seal ring (61) and a second hard seal ring (62) each having one contact portion (3), wherein the first hard seal ring (61) and the second hard seal ring (62) are adjacent to each other along an axis (A) at a predetermined mounting position and are coaxially arranged with each other, whereby the contact portions (3) are in contact with each other in the circumferential direction, in the sliding seal device. A sliding seal device, characterized in that at least one of the first hard seal ring (61) and the second hard seal ring (62) is formed based on Claim 1.

14. The sliding seal device (60) according to Claim 13, further comprising at least one soft seal ring (63, 64).

15. The sliding seal device according to Claim 14, wherein the soft seal ring (63, 64) has a circumferential line marking (66).

16. A hard seal ring, comprising a ring body (2, 2') having a rotationally symmetric basic shape with respect to an axis (A). The ring body (2, 2') has a contact portion (3) arranged on one end face of the ring body (2, 2') in a cross section (Q) located in the direction of the axis (A), the contact portion (3) facing outward in the direction of the axis (A), and the ring body (2, 2') has a groove portion (5) in the cross section (Q), the groove portion (5) being arranged on the radially circumferential surface of the ring body (2, 2') and located on the side opposite to the contact portion (3) with respect to the direction of the axis (A). The ring body (2, 2') has a sliding coating (8) on the contact portion (3). In the hard seal ring, The hard seal ring is characterized in that the ring body (2, 2') is manufactured by being deformed from a short-cut starting material, the starting material being bent into a ring shape and joined at both ends.

17. The ring bodies (2, 2') have a cavity (14) in the cross section (Q), the cavity (14) being located on the side opposite to the contact portion (3) on the one hand and on the side opposite to the groove portion (5) on the other hand. The ring bodies (2, 2') have one or more openings (23, 24) which open into the cavity (14). Hard seal ring according to claim 16.

18. In the cross section (Q), the ring bodies (2, 2') have a collar (13) at the groove portion (5) on the side opposite to the contact portion (3). A protective coating (25) is provided on the radial surface portion located between the groove portion (5) and the contact portion (3) in the ring bodies (2, 2'). Hard seal ring according to claim 16 or 17.

19. The sliding coating (8) has at least one stepped coating layer with a non-uniform material structure. Hard seal ring according to claim 16 or 17.

20. The ring bodies (2, 2') are formed from a metallic material and / or are formed from a plastic and / or are manufactured from a composite material. Hard seal ring according to claim 16 or 17.

21. The sliding coating (8) is formed in multiple layers. Hard seal ring according to claim 16 or 17.

22. The sliding coating (8) includes an anti-wear permanent sliding layer (11). Hard seal ring according to claim 21.

23. The sliding coating (8) includes a separate conforming layer (12). Hard seal ring according to claim 21.

24. A filling body (15) is arranged in the cavity (14). Hard seal ring according to claim 17.

25. On the radial peripheral surface of the ring bodies (2, 2'), surface portions (27, 28) with different adhesion promoting effects are provided adjacent to each other in the direction of the axis (A). Hard seal ring according to claim 16 or 17.

26. A sliding seal device, comprising at least one first rigid seal ring (61) and a second rigid seal ring (62) each having one contact portion (3), wherein the first rigid seal ring (61) and the second rigid seal ring (62) are adjacent to each other along an axis (A) at a predetermined mounting position and are coaxially arranged with each other, whereby the contact portions (3) are in contact with each other in the circumferential direction, in a sliding seal device. A sliding seal device, characterized in that at least one of the first rigid seal ring (61) and the second rigid seal ring (62) is formed based on claim 16.

27. The sliding seal device (60) according to claim 26, further comprising at least one soft seal ring (63, 64).

28. A manufacturing method for manufacturing the rigid seal ring according to claim 16, the manufacturing method comprising the following steps, namely: Preparing a semi-finished product (40) having an elongated or straight extension; Deforming the semi-finished product (40) and forming an intermediate product (44) having an open ring shape; Joining both ends (45) of the intermediate product (44) to form a ring body (2) having a rotationally symmetric basic shape with respect to an axis (A) and a closed circumference (U); A manufacturing method including.

29. The rigid seal ring has a sliding coating (8) on the contact portion (3) of the ring body (2). The manufacturing method according to claim 28.

30. The sliding coating (8) includes coating layers (9, 10), At least one of the coating layers (9, 10) Thermal spraying Laser alloying, Overlay welding, Vapor deposition Is deposited by one of the methods, the manufacturing method according to claim 29.

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