Mechanical seal with improved groove arrangement
By designing differentiated groove arrangements and groove rows with different radii in the slide ring seal, rapid lifting of the sliding surface and efficient sealing are achieved, solving the leakage problem of the slide ring seal at low speeds and ensuring efficient sealing at the start of rotation.
Patent Information
- Application Number
- CN202180022901.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-03-24
- Filing Date
- 2021-01-26
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2041-01-26
AI Technical Summary
Existing slip ring seals have difficulty in quickly lifting the sliding surface at low rotation speeds, resulting in leakage in the sealing gap, and are particularly unable to effectively prevent medium leakage at the start of rotation.
The groove arrangement between the rotating slip ring and the stationary slip ring is designed so that the top and bottom radii of the groove are differentiated, forming a surrounding step-by-step pressure increase. By arranging surrounding groove rows and groove-free sliding areas on the sliding surface, a rapid pressure field construction is achieved, especially forming a ring-shaped closed pressure field at the beginning of rotation.
Even at low speeds, the sliding surface can be quickly lifted, significantly reducing leakage at the start of rotation. Especially under high pressure differentials, the sealing effect is significant and the leakage is extremely small.
Smart Images
Figure CN115298463B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a slide ring seal, in particular a slide ring seal for gaseous media, having an improved groove arrangement of grooves in a sliding surface of the slide ring. Background Art
[0002] Various designs of slide ring seals with grooves are known from the prior art. In particular, in gas seals for sealing gaseous media, conveying grooves in the sliding surface of the rotating slide ring are known. These conveying grooves are used, in particular, to enable the sliding surfaces of the slide ring seal to be quickly lifted relative to one another when the machine to be sealed is started up. This allows a pressure increase to be generated in the sealing gap between the rotating slide ring and the stationary slide ring shortly after the start of rotation. This pressure increase is used to quickly lift the sliding surfaces relative to one another, thus enabling contactless operation of the slide ring seal. This minimizes any leakage that may occur during the start-up of the machine to be sealed.
[0003] It is therefore desirable to be able to lift the slip ring even at very low speeds. Summary of the Invention
[0004] The object of the present invention is therefore to provide a slide ring seal having a rotating slide ring and a stationary slide ring, which allows rapid lifting of the sliding surfaces of the slide rings from a standstill and at the same time has a simple structure and simple, cost-effective producibility.
[0005] This object is achieved by a slide ring seal having the features of claim 1 or 3. The dependent claims indicate preferred developments of the invention.
[0006] The slide ring seal according to the present invention, having the features of claim 1 or 3, allows the sliding surfaces of the rotating and stationary slide rings to be lifted quickly relative to each other from a stationary position. Furthermore, the slide ring seal provides an improved sealing effect against high pressures and, in particular, achieves a very rapid pressure increase in the sealing gap between the rotating and stationary slide rings at the start of rotation. Consequently, even at the start of rotation of the slide ring seal, virtually no leakage occurs via the sealing gap because a very rapid pressure increase is achieved.
[0007] This is achieved according to claim 1 by the slide ring seal comprising a rotating slide ring and a stationary slide ring, which define a sealing gap between them. One of the slide rings, in particular the rotating slide ring, comprises a first row of a plurality of first grooves, each having a base region located on a first radius R1 and a top region located on a second radius R2. The other slide ring, in particular the stationary slide ring, comprises at least a second row of a plurality of second grooves, each having a base region located on a third radius R3 and a top region located on a fourth radius R4. Thus, both the rotating slide ring and the stationary slide ring each comprise circumferentially arranged grooves. The top regions of the grooves face in the direction of the medium to be sealed. A first circumferential sliding region exists between the top region of the radially outermost row of first grooves of one slide ring and the radial outer edge of the slide ring. A second circumferential sliding region exists between the top region of the radially outermost row of second grooves of the other slide ring and the radial outer edge of the slide ring. Therefore, the sliding surfaces of the two slide rings each have a circumferential sliding area adjacent to the radial outer edge, in which no grooves or the like are provided. As a result, the two sliding areas form a sealing barrier adjacent to the radial outer edge, which serves as a seal, particularly when the slide ring seal is stationary. The radii of the bottom and top areas are selected so that the first radius R1 of the bottom area of the first groove is smaller than the third radius R3 of the bottom area of the second groove. Furthermore, the second radius R2 of the top area of the first groove is smaller than the fourth radius R4 of the top area of the second groove. This ensures that, during rotation, a stepwise pressure increase occurs in the sealing gap toward the medium to be sealed. The pressure increase occurs in the direction of the medium to be sealed. Thus, during operation, even at extremely low rotational speeds, which occur when the slide ring seal is started from a stationary state, a pressure field can be quickly built up between the sliding surfaces, particularly forming a closed annular pressure field in the circumferential direction. Since the surrounding closed pressure field is built up very quickly, even when the slide ring seal is started from a standstill, even if the pressure difference between the medium to be sealed and the atmosphere is several hundred degrees, the seal can be opened. 5 Pa, only a very small leakage occurs.
[0008] Furthermore, preferably, the fourth radius R4, on which the top region of the second groove is arranged, is at most 20% greater than the second radius R2, on which the top region of the first groove is arranged. This allows the grooves of the slide ring to overlap, thereby achieving a particularly rapid, step-by-step pressure increase that enables rapid sealing of the slide ring seal after activation. Particularly preferably, the fourth radius is at most 10% greater than the second radius.
[0009] According to claim 3, the advantages of the present invention are achieved by providing a sliding ring seal having a rotating sliding ring and a stationary sliding ring, which define a sealing gap between them. Here, one of the sliding rings, in particular the rotating sliding ring, has a first row of a plurality of first grooves, each having a base region located on a first radius R11 and a top region located on a second radius R12. The other sliding ring, in particular the stationary sliding ring, has at least a second row of a plurality of second grooves, each having a base region located on a third radius R13 and a top region located on a fourth radius R14. Thus, both the rotating sliding ring and the stationary sliding ring each have circumferentially arranged grooves. The top regions of the grooves face toward the medium to be sealed. A first circumferential sliding region exists between the top region of the radially innermost row of first grooves of one sliding ring and the radial inner edge of the sliding ring. A second circumferential sliding region exists between the top region of the radially innermost row of second grooves of the other sliding ring and the radial inner edge of the sliding ring. Therefore, the sliding surfaces of the two slide rings each have a circumferential sliding area adjacent to the radially inner edge, in which no grooves or similar features are provided. Thus, these two sliding areas form a sealing barrier adjacent to the radially inner edge, which provides a sealing effect, particularly when the slide ring seal is stationary. The radii of the bottom and top areas are selected so that the first radius R11 of the bottom area of the first groove is greater than the third radius R13 of the bottom area of the second groove. Furthermore, the second radius R12 of the top area of the first groove is greater than the fourth radius R14 of the top area of the second groove. This ensures that during rotation, a gradual pressure increase occurs in the sealing gap toward the radially inner side of the medium to be sealed. This pressure increase also occurs toward the medium to be sealed. As a result, during operation, even at extremely low rotational speeds, which occur when the slide ring seal is started from a standstill, a pressure field can be quickly built up between the sliding surfaces. This pressure field, in particular, forms a closed annular pressure field in the circumferential direction. Since the surrounding closed pressure field is built up very quickly, even when the slide ring seal is started from a standstill, even if the pressure difference between the medium to be sealed and the atmosphere is several hundred degrees, the seal can be opened. 5 Pa, only a very small leakage occurs.
[0010] Furthermore, preferably, the fourth radius R14, on which the top region of the second groove is arranged, is at most 20% smaller than the second radius R12, on which the top region of the first groove is arranged. This allows the grooves of the slide ring to overlap, thereby achieving a particularly rapid, step-by-step pressure increase that enables rapid sealing of the slide ring seal after activation. Particularly preferably, the fourth radius R14 is at most 10% smaller than the second radius R12.
[0011] A rapid pressure increase can be further supported if the first and / or second grooves preferably have a depth that varies from the bottom region to the top region. The depth preferably decreases from the bottom region to the top region. Particularly preferably, the depth decreases continuously toward the top region of the groove. Alternatively, the depth decreases in steps from the bottom region to the top region. Furthermore, a tangential transition from the top region to the sliding surface of the slip ring is preferably provided.
[0012] According to other preferred designs of the present invention, the groove of the slip ring is configured with an arcuate path in a sickle shape. Here, the tip of the sickle-shaped groove is preferably arranged at the top region of the groove, so that the groove is preferably a sickle-shaped V-groove.
[0013] Further preferably, the grooves of the rotating slip ring and the grooves of the stationary slip ring are arranged in opposite directions. This achieves a cross-arrangement of the grooves of the rotating slip ring and the grooves of the stationary slip ring. Consequently, the slip ring seal can reliably seal in both rotational directions, regardless of the direction of rotation.
[0014] According to another preferred embodiment of the present invention, the overlap between the groove of the rotating slip ring and the groove of the stationary slip ring is at least 10% and preferably at most 40% of the groove surface.
[0015] According to another preferred embodiment of the present invention, one of the slip rings has a third row of a plurality of third grooves, thereby enabling an additional pressure increase stage to be achieved in the sealing gap between the slip rings.
[0016] Furthermore, the other of the slide rings preferably has a fourth row of a plurality of fourth grooves. Thus, each of the two slide rings has two rows of grooves at different radial positions, which enable a stepwise pressure increase in the sealing gap, in particular during the start-up phase of the slide ring seal.
[0017] Preferably, the geometry of the grooves of the slip rings is identical.
[0018] According to another preferred design of the present invention, the grooves of the rotating slip ring and the stationary slip ring do not overlap. In other words, the radii of the bottom and top regions are selected so that a sliding area exists in the radial direction between the grooves of the two slip rings. Even when the groove rows on the sliding surfaces of the slip rings do not overlap, pressure buildup can be achieved because the pressure field generated at the radial top region of the grooves extends beyond the radius of the groove top region. This allows pressure buildup to continue for subsequent radial groove rows.
[0019] According to another preferred embodiment of the present invention, the slide ring seal includes a third sliding area and a fourth sliding area that are connected circumferentially at the radial inner edge of the slide ring. These third and fourth sliding areas form a second sealing area at the inner circumference of the sealing gap. This further improves the sealing performance of the slide ring seal when it is stationary.
[0020] It is further preferred that the slide ring seal is a gas seal which preferably seals off a gaseous medium with respect to the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the drawings:
[0022] Figure 1 shows a schematic cross-sectional view of a slide ring seal according to a first embodiment of the present invention,
[0023] Figure 2 Shown Figure 1 Schematic top view of the sliding surface of the rotating slip ring,
[0024] Figure 3 Shown Figure 1 Schematic top view of the sliding surface of the stationary slip ring,
[0025] Figure 4 Shown Figure 1 Schematic cross-sectional view of the groove in the rotating slip ring,
[0026] Figure 5 Shown Figure 1 Schematic cross-sectional view of the groove in the stationary slip ring,
[0027] Figure 6 Shown in Figure 1 The overlapping area during the relative rotation between the rotating slip ring and the stationary slip ring Schematic diagram, and
[0028] Figure 7 A schematic diagram showing an arrangement of slots according to a second embodiment of the present invention,
[0029] Figure 8 A schematic top view showing a sliding surface of a rotating slip ring according to a third embodiment of the present invention, and
[0030] Figure 9 A schematic top view of a sliding surface of a stationary slip ring according to a third embodiment is shown. DETAILED DESCRIPTION
[0031] Refer to the following Figures 1 to 6 A slide ring seal 1 according to a first preferred embodiment of the present invention will be described in detail.
[0032] As from Figure 1 As can be seen in FIG, the slide ring seal 1 comprises a rotating slide ring 2 and a stationary slide ring 3. A sealing gap 4 is defined between the rotating slide ring 2 and the stationary slide ring 2.
[0033] In this case, the mechanical seal 1 seals a product region 14 which is under high pressure from an atmospheric region 15 .
[0034] The slide ring seal 1 of this embodiment is a gas seal because the medium to be sealed in the product area 14 is gas.
[0035] The rotating slip ring 2 is rotatably connected to the rotating shaft 8. Reference numeral M indicates the center line of the shaft 8.
[0036] The stationary slip ring 3 is arranged on the housing 9 in a rotationally fixed manner.
[0037] Figures 2 to 5 Details of the rotating slip ring 2 and the stationary slip ring 3 are shown. Figure 2 The top view of the rotating slip ring is shown in FIG. Figure 2 As can be seen in the figure, a plurality of grooves are provided on the sliding surface 20 of the rotating slide ring 2 that faces the sealing gap 4. The grooves are designed as sickle-shaped V-grooves and are arranged in two rows. Here, a plurality of first grooves 5 form a first row 11 of grooves. A plurality of third grooves 7 form a third row 13 of grooves. Figure 3 The figure shows a top view of the sliding surface 30 of the stationary slip ring 3. A second row 12 of second grooves 6 is arranged in the sliding surface 30 of the stationary slip ring 3. The second grooves 6 are also designed as sickle-shaped V-grooves. The arc shape of the sickle-shaped second grooves 6 is the opposite of the arc shape of the first grooves 5 and the third grooves 7 of the rotating slip ring 2.
[0038] The overlapping region 10 is preferably approximately 10% to 20% of the respective groove surface.
[0039] Figure 4 1 shows a cross-sectional view of the rotating slip ring 2 along the center line of the first groove 5 and the third groove 7. The first groove 5 comprises a bottom area 50 with a first radius R1 and a top area 51 with a second radius R2. Figure 4 As can be seen in FIG, the depth of the first groove 5 changes in a continuous manner starting from the bottom area 50 toward the top area 51. Here, the depth of the first groove 5 becomes continuously smaller in the direction of the top area 51.
[0040] In the same manner as the first groove 5 , the third groove 7 is also configured with a bottom region 70 and a top region 71 , wherein the depth of the groove decreases continuously in the direction from the bottom region 70 toward the top region 71 .
[0041] Figure 5A cross-section of the center line of the second groove 6 is shown. The second groove 6 also has a bottom region 60 and a top region 61. The depth of the second groove 6 also changes continuously from the bottom region 60 toward the top region 61. Here, the depth decreases continuously from the bottom region 60 toward the top region 61.
[0042] It should be noted that in these embodiments, all grooves 5, 6, 7 of the three groove rows are identically constructed. Only the curvature of the second groove 6 in the stationary slip ring 3 is opposite to the curvature of the first groove 5 and the third groove 7 in the rotating slip ring 2. As a result, a cross arrangement of the grooves is achieved in a top view of the sealing gap in the direction of the center line M. This is in Figure 6 As a result, when the rotating slip ring rotates (arrow A), an overlapping area 10 is formed each time the groove is swept. The sealing can be independent of the direction of rotation.
[0043] As from Figure 1 As can be seen from the cross-sectional view of FIG, a graded groove arrangement of grooves 5, 6, 7 is formed in the sliding surfaces 20, 30 of the rotating slip ring 2 and the stationary slip ring 3. Figure 2 and Figure 3 As can be seen, the bottom region 50 of the first groove 5 is arranged on a first radius R1, and the bottom region 60 of the second groove 6 is arranged on a third radius R3, the first radius being smaller than the third radius. Furthermore, the top region 51 of the first groove 5 is arranged on a second radius R2, and the top region 61 of the second groove 6 is arranged on a fourth radius R4, the second radius being smaller than the fourth radius. Furthermore, the bottom region 70 of the third groove 7 is arranged on a fifth radius R5, which is smaller than the fourth radius R4. The top region 71 of the third groove 7 is arranged on a sixth radius R6, and the top region 61 of the second groove 6 is arranged on a fourth radius R4, which is larger than the fourth radius.
[0044] This arrangement of the grooves 5, 6, and 7 creates a stepped structure of the groove arrangement on the sliding surface. During operation, when the rotating slip ring 2 begins to rotate from a standstill, a pressure field can be rapidly generated at the corresponding top regions of the grooves, wherein an increasing pressure can be achieved starting from the radial inner side 40 of the sealing gap 4 in the atmosphere region 15 to the radial outer side 41 of the sealing gap 4 in the product region 14. The direction of increasing pressure is indicated by arrow B in the figure.
[0045] More precisely, at the start of rotation, a first pressure is achieved using a correspondingly formed pressure field in the region of the top region 51 of the first groove 5. This pressure field is transferred to the bottom region 60 of the second groove 6, from which another pressure field is then generated by the rotation in the region of the top region 61 of the second groove 6. This second pressure field is then transferred in the same manner to the bottom region 70 of the third groove 7.
[0046] As a result, a very rapid pressure increase is achieved at the start of rotation of the rotating slip ring 2, resulting in a rapid lifting of the sliding surfaces 20, 30 relative to one another and, despite this, at most minimal leakage from the product area 14 via the sealing gap 4 to the atmospheric area 15. Consequently, an increasing pressure prevails in the sealing gap 4 from the radial inside 40 to the radial outside 41 of the sealing gap.
[0047] By thus generating a circumferential, continuous overpressure region in the region of the top region of each of the grooves 5 , 6 , 7 , a rapid pressure increase in the sealing gap 4 is supported and possible leakage during the start-up of the rotating slip ring is reduced to a minimum.
[0048] Therefore, by providing grooves in both sliding surfaces 20, 30, which are arranged in rows along the sliding surface in a circumferential direction, a targeted sealing effect against high pressures can be achieved during rotation. The staggered arrangement of overlapping grooves creates an overlapping region where a targeted, stepped pressure increase can be achieved. This results in significantly reduced leakage during actuation of the rotating slip ring. This groove arrangement allows compression ratios of 1:100 or more to be achieved in the region of the sealing gap 4, starting from the pressure in the atmospheric region 15. This is typically significantly higher than the pressure difference between the product region 14 and the atmospheric region 15.
[0049] If further from Figure 2 and Figure 3 As can be seen in the figure, the first row 11 consisting of the first grooves 5 and the third row 13 consisting of the third grooves 7 are arranged so that a first outer sliding area 23 is formed at the radial outer edge 21. At the stationary slide ring 3, a second outer sliding area 33 is formed at the radial outer edge 31. Therefore, the respective circumferential, groove-free sliding areas 23, 33 form an outer sealing barrier between the first sliding area 23 and the second sliding area 33 in the stopped state of the slide ring seal. Therefore, the grooves are designed so that they do not reach the radial outer edge, so that an outer sealing barrier 42 can be realized by the circumferential sliding areas 23, 33, which additionally reduces possible leakage during startup. Schematically in Figure 1 The outer sealing barrier 42 is shown in FIG.
[0050] Figure 7A slide ring seal according to a second embodiment of the present invention is schematically illustrated. The slide ring seal of the second embodiment essentially corresponds to the first embodiment, differing from the first embodiment in that there is no overlap between the rows of first grooves 5 and second grooves 6. Therefore, the second radius R2 at the top region 51 of the first groove 5 is always smaller than the third radius R3 at the bottom region 60 of the second groove 6. Despite this, the concept of a stepwise pressure increase according to the present invention is achieved because the pressure increase in the first groove 5 creates a pressure field in the top region 51 that protrudes radially outward beyond the top region 51. Consequently, the pressure field is located in the region of the bottom region 60 of the row of second grooves 6. This allows for a continuous, further pressure increase across the row of second grooves 6. It should be noted that the radial spacing between the top region 51 and the bottom region 60 is preferably selected so that it is at most 50% of the radial dimension of the first groove 5. In other words, the inequality: R3-R2≤1 / 2·(R2-R1) is preferably satisfied. Otherwise, this embodiment corresponds to the previous embodiment, and reference can be made to the description of the previous embodiment.
[0051] Figure 8 and Figure 9 A slide ring seal according to a third embodiment of the present invention is shown. Identical or functionally identical components are denoted by the same reference numerals.
[0052] The third embodiment corresponds substantially to the first embodiment, except that the pressure increasing direction B is opposite. Figure 8 and Figure 9 As can be seen in the figure, in the third embodiment, the product area 14 is arranged radially inside the sliding surfaces of the slip rings 2, 3, and the atmosphere area 15 is arranged radially outside the slip rings 2, 3. This results in a pressure increase direction B that extends radially from outside to inside.
[0053] As from Figure 8 As can be seen in FIG, a first row 11 consisting of first grooves and a third row 13 consisting of third grooves are arranged in the rotating slip ring 2. Figure 9 As shown, a second row 12 of second grooves is formed in the stationary slip ring 3. The grooves of the three rows 11, 12, and 13 are arranged as sickle-shaped V-grooves. Due to the opposite pressure increase direction B compared to the first embodiment, the bottom area and the top area of the groove are also opposite in the radial direction. Figure 8As can be seen in the figure, the bottom area 50 of the first groove 5 reaches the radial outer edge 21 of the rotating slip ring. However, the third groove 7 of the rotating slip ring 2 does not reach the radial inner edge 22 of the rotating slip ring. Similarly, the top area 61 of the second groove 6 does not reach the radial inner edge 32 of the stationary slip ring. As a result, an inner sliding area 24 is formed at the rotating slip ring, and an inner sliding area 34 is formed at the stationary slip ring 3. As a result, a sealing barrier is provided on the radial inside of the sliding surface by the two inner sliding areas 24, 34, which provides an additional sealing function relative to the product area 14, especially in the stationary state of the slide ring seal.
[0054] As in the first embodiment, no overlapping area is formed between the first groove 5 and the second groove 6, and no overlapping area is formed between the second groove 6 and the third groove 7. Figure 8 As can be seen from FIG, the bottom region 50 of the first groove 5 is arranged on the first radius R11 and the top region 51 is arranged on the second radius R12. The bottom region 70 of the third groove 7 is arranged on the fifth radius R15 and the top region 71 is arranged on the sixth radius R16. Figure 9 As can be seen in the figure, the bottom region 60 of the second groove 6 is arranged on the third radius R13, and the top region 61 is arranged on the fourth radius R14. Because an overlapping region is formed between the first groove 5 and the second groove 6, the third radius R13 is greater than the second radius R12. Furthermore, in the overlapping region between the second groove 6 and the third groove 7, the fourth radius R14 of the top region 61 is smaller than the fifth radius R15 of the bottom region 70 of the third groove 7.
[0055] As from Figure 8 As can be seen from FIG, the bottom area 50 of the first groove 5 reaches the radial outer edge 21 of the rotating slip ring. In contrast, the top area 71 of the third groove 7 does not reach the radial inner edge 22 of the rotating slip ring. Figure 9 As can be seen in FIG, the bottom area 60 of the second groove 6 does not reach the radial outer edge 31 of the stationary slip ring. The top area 61 of the second groove 6 also does not reach the radial inner edge 32 of the stationary slip ring. Thus, a radially inner sealing barrier 42 is achieved.
[0056] With regard to the described exemplary embodiment, it should be noted that, conversely, a stepped arrangement of multiple rows of grooves can also be provided on the sliding surface of the slip ring. This means that the first row 11 and the third row 13 of grooves can also be provided on the stationary slip ring 3, and the second row 12 of grooves can in this case be arranged correspondingly on the rotating slip ring 2. The number of rows of grooves in the sliding surface can also be varied. It is essential for the invention that the rows of grooves on the two sliding surfaces are arranged alternately in the radial direction from the inside out, respectively, at different average groove diameters, in order to achieve a stepped pressure increase in the sealing gap from the inside out.
[0057] Here, the grooves can partially overlap during rotation or alternatively there can be no overlap. In the slide ring seal, a mixed arrangement can also be achieved, ie two rows of grooves partially overlap and two rows of grooves do not overlap.
[0058] Description of Reference Numerals
[0059] 1 Slide ring seal
[0060] 2 Rotating slip rings
[0061] 3 Stationary slip rings
[0062] 4 Sealing gap
[0063] 5 First Slot
[0064] 6 Second slot
[0065] 7 Third slot
[0066] 8-axis
[0067] 9 Housing
[0068] 10 Overlapping Area
[0069] 11 The first row consisting of the first slot
[0070] 12 The second row consisting of the second slot
[0071] 13 The third row consisting of the third slot
[0072] 14 Product Areas
[0073] 15 Atmospheric Region
[0074] 20 Sliding surface of rotating slip ring
[0075] 21 Radial outer edge of the rotating slip ring
[0076] 22 Radial inner edge of the rotating slip ring
[0077] 23 First sliding area of sliding surface
[0078] 24 Inner sliding area of stationary slip ring
[0079] 30 Sliding surface of stationary slip ring
[0080] 31 Radial outer edge of the stationary slip ring
[0081] 32 Radial inner edge of the stationary slip ring
[0082] 33 Second sliding area of the stationary slip ring
[0083] 34 Inner sliding area of stationary slip ring
[0084] 40 Radially inside the sealing gap
[0085] 41 Radially outside the sealing gap
[0086] 42 Sealing barrier
[0087] 50 bottom area
[0088] 51 Top Area
[0089] 60 bottom area
[0090] 61 Top Area
[0091] 70 bottom area
[0092] 71 Top Area
[0093] A. Direction of rotation
[0094] B Pressure increasing direction
[0095] M midline
[0096] R1 first radius of the bottom region 50
[0097] R2 Second radius of the top region 51
[0098] R3 The third radius of the bottom region 60
[0099] R4 The fourth radius of the top region 61
[0100] R5 fifth radius of the bottom region 70
[0101] R6 Sixth radius of the top region 71
[0102] R11 First radius of the bottom region 50
[0103] R12 Second radius of the top region 51
[0104] R13 The third radius of the bottom area 60
[0105] R14 The fourth radius of the top region 61
[0106] R15 Fifth radius of the bottom area 70
[0107] R16 is a sixth radius of the top region 71 .
Claims
1. A sliding ring seal, comprising: - a rotating slip ring (2) and a stationary slip ring (3), said rotating slip ring and said stationary slip ring defining a sealing gap (4) therebetween, - wherein the rotating slip ring has at least a first row (11) of a plurality of first grooves (5), the first grooves having a bottom region (50) located on a first radius (R1) and a top region (51) located on a second radius (R2), wherein a first circumferential sliding region (23) is present between the top region of the radially outermost row of grooves of the rotating slip ring and the radial outer edge (21) of the rotating slip ring, - wherein the stationary slip ring has at least a second row (12) of a plurality of second grooves (6), the second grooves having a bottom region (60) located on a third radius (R3) and a top region (61) located on a fourth radius (R4), wherein a second circumferential sliding region (33) is present between the top region of the radially outermost row of grooves of the stationary slip ring and the radial outer edge (31) of the stationary slip ring, - wherein the first radius (R1) is smaller than the third radius (R3), - wherein the second radius (R2) is smaller than the fourth radius (R4), - wherein the first groove (5) and the second groove (6) each have a depth that varies from a bottom region to a top region, - wherein the depths of the first groove (5) and the second groove (6) decrease starting from the bottom region in the direction of the top region, and - wherein the first groove (5) of the rotating slip ring (2) and the second groove (6) of the stationary slip ring (3) have an overlapping area (10). 2 . The slide ring seal according to claim 1 , wherein the fourth radius ( R4 ) is at most 20% larger than the second radius ( R2 ). 3 . The slide ring seal according to claim 1 , wherein the first groove ( 5 ) and the second groove ( 6 ) are designed in a sickle-shaped manner with an arc-shaped course.
4. The slide ring seal according to claim 3, wherein the first groove (5) and the second groove (6) are sickle-shaped V-grooves having a tip at the top area.
5. The slide ring seal according to claim 3, wherein the first groove (5) of the rotating slide ring (2) and the second groove (6) of the stationary slide ring (3) are arranged in opposite directions.
6. The slide ring seal according to claim 1 or 2, wherein the overlapping area (10) of the first groove (5) of the rotating slide ring (2) and the second groove (6) of the stationary slide ring (3) is 10%-20% of the groove surface.
7. The slide ring seal according to claim 1 or 2, wherein the rotating slide ring has a third row (13) consisting of a plurality of third grooves (7). 8 . The slide ring seal according to claim 7 , wherein the stationary slide ring has a fourth row consisting of a plurality of fourth grooves.
9. The slide ring seal according to claim 7, wherein the geometric shapes of the first groove (5) and the third groove (7) are the same. 10 . The slide ring seal according to claim 1 , wherein the slide ring seal is a gas seal for sealing a gaseous medium.
11. A sliding ring seal, comprising: - a rotating slip ring (2) and a stationary slip ring (3), said rotating slip ring and said stationary slip ring defining a sealing gap (4) therebetween, - wherein the rotating slip ring has at least a first row (11) of a plurality of first grooves (5), the first grooves having a bottom region (50) located on a first radius (R11) and a top region (51) located on a second radius (R12), wherein a first circumferential sliding region (24) is present between the top region of the radially innermost row of grooves of the rotating slip ring and the radial inner edge (22) of the rotating slip ring, - wherein the stationary slip ring has at least a second row (12) of a plurality of second grooves (6), the second grooves having a bottom region (60) located on a third radius (R13) and a top region (61) located on a fourth radius (R14), wherein a second circumferential sliding region (34) is present between the top region of the radially innermost row of grooves of the stationary slip ring and the radial inner edge (32) of the stationary slip ring, - wherein the first radius (R11) is greater than the third radius (R13), - wherein the second radius (R12) is greater than the fourth radius (R14), - wherein the first groove (5) and the second groove (6) each have a depth that varies from a bottom region to a top region, - wherein the depths of the first groove (5) and the second groove (6) decrease starting from the bottom region in the direction of the top region, and - wherein the first groove (5) of the rotating slip ring (2) and the second groove (6) of the stationary slip ring (3) have an overlapping area (10).
12. The slide ring seal according to claim 11, wherein the fourth radius (R14) is at most 20% smaller than the second radius (R12). 13 . The slide ring seal according to claim 11 , wherein the first groove ( 5 ) and the second groove ( 6 ) are designed in a sickle-shaped manner with an arc-shaped course.
14. The slide ring seal according to claim 13, wherein the first groove (5) and the second groove (6) are sickle-shaped V-grooves having a tip at the top area.
15. The slide ring seal according to claim 13, wherein the first groove (5) of the rotating slide ring (2) and the second groove (6) of the stationary slide ring (3) are arranged in opposite directions.
16. The slide ring seal according to claim 11 or 12, wherein the overlapping area (10) of the first groove (5) of the rotating slide ring (2) and the second groove (6) of the stationary slide ring (3) is 10%-20% of the groove surface.
17. The slide ring seal according to claim 11 or 12, wherein the rotating slide ring has a third row (13) consisting of a plurality of third grooves (7).
18. The slide ring seal of claim 17, wherein the stationary slide ring has a fourth row consisting of a fourth plurality of grooves.
19. The slide ring seal according to claim 17, wherein the geometric shapes of the first groove (5) and the third groove (7) are the same.
20. The slide ring seal according to claim 11 or 12, wherein the slide ring seal is a gas seal for sealing a gaseous medium.
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