sealing ring

Abstract

Sealing ring (1) for sealing an annular gap between two shaft components (2, 3), wherein the sealing ring (1) has a load-equalizing hose (4) which is provided and designed for force transmission between the superimposed areas of the shaft components (2, 3) and has two chambers (7, 8) which are filled with an inelastic material, and wherein the sealing ring (1) has a sealing element (6) connected to the load-equalizing hose (4) via a connection area (5), which is provided and designed for sealing the annular gap, wherein the two chambers (7, 8) are adjacent chambers (7, 8) and are separated by a wall (11) extending from a lower bottom area of ​​the load-equalizing hose to an upper ceiling area of ​​the load-equalizing hose, and the adjacent separated chambers (7, 8) are filled with sand, characterized in that the side walls (9, 8) extending vertically in the installed state10) of the load-equalizing hose (4) are thicker than the horizontally oriented bottom (12) of the load-equalizing hose (4) when installed, and that the vertically extending side walls (9, 10) of the load-equalizing hose (4) when installed are thicker than the horizontally oriented top (13) of the load-equalizing hose (4) when installed.

Description

[0001] The invention relates to a sealing ring for sealing an annular gap between two shaft components, wherein the sealing ring has a load-equalizing hose which is provided and designed for force transmission between the overlapping areas of the shaft components and has two chambers which are filled with an inelastic material and wherein the sealing ring has a sealing element connected to the load-equalizing hose via a connection area, which is provided and designed for sealing the annular gap.

[0002] A generic sealing ring is disclosed in EP 0 634 532 A2. This sealing ring serves to seal an annular gap between two shaft components, wherein the sealing ring has a load-equalizing tube designed and intended for force transmission between the superimposed areas of the shaft components and filled with an inelastic material. The use of two superimposed chambers with different materials and different functions is described here. The upper cavity contains an incompressible mass, relatively easily movable in the horizontal direction, for example, a liquid, as a filling, which ensures particularly good pressure equalization. In contrast, the lower cavity contains a load-bearing mass, such as sand.

[0003] From DE 10 2005 015 680 A1, a sealing ring for sealing a gap between two shaft components is known, wherein the sealing ring has a load-equalizing hose which is designed and intended for force transmission between the overlapping areas of the shaft components and is filled with an inelastic material. The sealing ring has a sealing element connected to the load-equalizing hose via a connection area. This sealing element is designed and intended for sealing the annular gap.

[0004] EP 0 853 209 B1 also describes a sealing arrangement in precast concrete elements with a sealing ring which has a liquid-paste-like mass as a lubricant in a pocket.

[0005] The invention is based on the objective of creating a sealing ring of the type mentioned above that enables particularly reliable load balancing.

[0006] This problem is solved with a sealing ring having the features of claim 1. Advantageous embodiments of the invention are described in the dependent claims.

[0007] In a sealing ring for sealing an annular gap between two shaft components, wherein the sealing ring has a load-equalizing hose which is provided and designed for force transmission between the superimposed areas of the shaft components and has two chambers which are filled with an inelastic material, and wherein the sealing ring has a sealing element connected to the load-equalizing hose via a connection area, which is provided and designed for sealing the annular gap, wherein the two chambers (7, 8) are adjacent chambers (7, 8) and are separated by a wall (11) extending from a lower bottom area of ​​the load-equalizing hose to an upper ceiling area of ​​the load-equalizing hose, and the adjacent separated chambers (7, 8) are filled with sand, it is essential to the invention thatthat the vertically extending side walls of the load-equalizing hose in the installed state are thicker than the horizontally oriented bottom of the load-equalizing hose in the installed state, and that the vertically extending side walls of the load-equalizing hose in the installed state are thicker than the horizontally oriented top of the load-equalizing hose in the installed state.

[0008] The wall's orientation as vertical is not necessarily to be taken literally; in any case, the wall should extend from a lower floor area to an upper ceiling area of ​​the load-bearing conduit, thus forming two adjacent chambers. Therefore, a perfectly vertical wall in the sense of a 90° angle is not strictly required, although this would be particularly advantageous.

[0009] These chambers are filled with sand, an inelastic material, creating two adjacent chambers that exhibit particularly good dimensional stability and prevent excessive sand displacement, which can occur with a single chamber. Overall, the sealing ring significantly improves the properties of the load-equalizing hose.

[0010] According to the invention, the vertically extending side walls of the load-equalizing hose, when installed, are thicker than the horizontally oriented base of the load-equalizing hose. Similarly, according to the invention, the vertically extending side walls of the load-equalizing hose, when installed, are thicker than the horizontally oriented top of the load-equalizing hose. This creates greater stability in the side wall area and reduces excessive elasticity in the top and bottom areas, which is caused by the walls being made of a compressible material. Preferably, the widest area of ​​the side walls is more than twice as wide as the thickest area of ​​the bottom and / or top. This particularly effectively achieves the aforementioned advantages.

[0011] In another preferred embodiment, the chambers taper slightly from bottom to top. The upper width of the chambers is preferably 0.6 to 0.9 times the lower width of the chambers. Furthermore, the chambers are preferably taller than they are wide. In particular, the height is preferably more than twice the width of the chamber at the upper end and especially preferably also more than twice the width at the lower end. However, the height is typically no more than three times the width of the chambers.

[0012] In another preferred embodiment of the invention, the sealing ring consists of a first material and a second material, wherein the first material has a greater hardness than the second material. Preferably, both materials are compressible, in particular rubber materials. Styrene-butadiene rubbers are typically used. The first material with the greater hardness preferably has a hardness of 70 ± 5 IRHD. The second material with the lower hardness preferably has a hardness of 50 ± 5 IRHD.

[0013] In a preferred embodiment, the load-equalizing hose is made of the first material, i.e., the harder material. Furthermore, it is preferred that the sealing element is made of the second material. The connection area is also preferably made of the second material. The load-equalizing hose preferably has a cavity in its cross-section, the cavity being larger than the cross-section of the load-equalizing hose.

[0014] The invention will now be explained in more detail with reference to an embodiment illustrated in the drawing. Specifically, the schematic representations in: Fig. 1: a cross-section through a sealing ring according to the invention; and Fig. 2: a first shaft component, namely a pointed end with a fitted sealing ring; and Fig. 3: a first and second shaft component, namely the spigot end and socket of a pipe shaft with the built-in sealing ring.

[0015] In Fig. Figure 1 shows a cross-section through a sealing ring 1 according to the invention, or rather, one side of the annular sealing ring 1. The sealing ring 1 has three sections: a load-equalizing hose 4 and a sealing element 6, which are connected by a connecting section 5. The load-equalizing hose 4 is made of a first, harder material 14, while the connecting section 5 and the sealing element 6 are made of a second, less hard material 15. The load-equalizing hose 4 has, in cross-section, side walls 9 and 10, a bottom 12, and a top 13. The terms bottom 12 and top 13, as well as top and bottom, refer to the typical position in the installed state. A wall 11 extends from the bottom 12 to the top 13, dividing the load-equalizing hose 4 into two chambers 7 and 8. Preferably, the chambers 7 and 8 are approximately the same size. The wall 11 extends from the bottom 12 to the top 13.Preferably, wall 11 is vertically oriented, and chambers 7 and 8 are mirror images of wall 11. Side walls 9 and 10 are thicker than base 12 and ceiling 13. Overall, the load-equalizing tube 4 tapers slightly upwards. The upper width of the load-equalizing tube is approximately 60% to 70% of the lower width of the load-equalizing tube 4. Chambers 7 and 8 also taper upwards. Wall 11, which separates chambers 7 and 8, is narrower than side walls 9 and 10. Wall 11 is approximately as wide as base 12. The height of chambers 7 and 8 is two to three times their width. Thus, the chambers have an upwardly directed recess. Chambers 7 and 8 are filled with an inelastic material, particularly sand, especially fine quartz sand.The overall width across both chambers 7 and 8 corresponds approximately to the height of the chambers + / - 10%. The connection area 5 and the sealing element 6 have a lower profiled contact surface 16 on their underside. In contrast, the connection area 5, the side wall 10 of the load-equalizing hose 4 facing the sealing element 6, and the cover 13 of the load-equalizing hose 4 have an upper profiled contact surface 20. It should be noted that the profile 20 has a smaller profile than the profile of the lower profiled contact surface 16. The thickness of the connection area 5 corresponds approximately to the thickness of the side walls 9 and 10 of the load-equalizing hose 4. The sealing element 6 has a material reservoir 17 adjacent to the connection area 5, to which a hose 18, oriented towards the load-equalizing hose 4 and inclined, is attached. The wall thickness of this hose 18 corresponds approximately to the wall thickness of the wall 11.Inside, a cavity 19 is provided, which is comparatively large, creating a kind of rolling seal. In the unloaded state, the cavity 19 is large enough to accommodate the load-equalizing hose 4.

[0016] In Fig. Figure 2 shows a first shaft component 2, specifically the pointed end of a pipe shaft, in this case a concrete pipe shaft. The cross-section through one wall of the circular pipe is shown. The upper end 22 of the pipe shaft is rounded. The sealing ring 1 is fitted onto this upper end 22 around the rounded section. A projection 23 adjoins this rounded end towards the lower pipe, and the material reservoir 17 of the sealing ring 1 rests on this projection. The sealing element 6 is located essentially on the outside of the pointed end of the first shaft component 2, the connection area 5 of the sealing ring 1 is located essentially in the area of ​​the rounded end 22, and the load-equalizing hose rests on top of the first shaft component 2. The load-equalizing hose 18 lies flat on the material reservoir 17 and the connection area 5.

[0017] In Fig.The second shaft component 3, here the socket, is now pushed onto the pointed end of the first shaft component 2. The distance between the first shaft component 2 and the second shaft component 3 is largely determined by the load-equalizing hose 4. During the sliding process, the hose 18 is pushed downwards over the material reservoir 17 and, together with the material reservoir 17, forms the actual seal between the shaft components 2 and 3. The load-equalizing hose 4, with its two chambers 7 and 8, is particularly dimensionally stable, thus enabling a particularly safe and reliable installation of the pipe shaft.

[0018] All features mentioned in the preceding description and in the claims can be combined in any selection with the features of the independent claim. The disclosure of the invention is therefore not limited to the described or claimed combinations of features; rather, all combinations of features meaningful within the scope of the invention are to be considered disclosed.

Claims

[1] Sealing ring (1) for sealing an annular gap between two shaft components (2, 3), wherein the sealing ring (1) comprises a load-equalizing hose (4) which is provided and designed for force transmission between the superimposed areas of the shaft components (2, 3) and has two chambers (7, 8) which are filled with an inelastic material, and wherein the sealing ring (1) comprises a sealing element (6) connected to the load-equalizing hose (4) via a connection area (5), which is provided and designed for sealing the annular gap, wherein the two chambers (7, 8) are adjacent chambers (7, 8) and are separated by a wall (11) extending from a lower bottom area of ​​the load-equalizing hose to an upper ceiling area of ​​the load-equalizing hose, and the adjacent separated chambers (7, 8) are filled with sand, characterized by, that the vertically extending side walls (9, 10) of the load-equalizing hose (4) are thicker than the horizontally oriented bottom (12) of the load-equalizing hose (4) when installed, and that the vertically extending side walls (9, 10) of the load-equalizing hose (4) are thicker than the horizontally oriented top (13) of the load-equalizing hose (4) when installed. [2] Sealing ring according to claim 1, characterized by , that the widest area of ​​the side walls (9, 10) is more than twice as wide as the thickest area of ​​the floor (12) and / or ceiling (13). [3] Sealing ring according to one of the preceding claims, characterized by , that the chambers (7, 8) are narrower in the upper area than in the lower area. [4] Sealing ring according to one of the preceding claims, characterized by, that the upper width of the chambers (7, 8) is 0.6 to 0.9 times the lower width of the chambers (7, 8). [5] Sealing ring according to one of the preceding claims, characterized by , that the height of the chambers (7, 8) is greater than their width. [6] Sealing ring according to any one of the preceding claims, characterized by , that the height of the chambers (7, 8) is more than twice the width of the chamber (7, 8) at the upper end. [7] Sealing ring according to one of the preceding claims, characterized by , that the sealing ring (1) is formed from a first material (14) and a second material (15), wherein the first material (14) has a greater hardness than the second material (15). [8] Sealing ring according to claim 7, characterized by , that the load balancing hose (4) consists of the first material (14). [9] Sealing ring according to claim 7 or 8, characterized by , that the sealing element (6) consists of the second material (15). [10] Sealing ring according to claims 7 to 9, characterized by , that the connection area (5) consists of the second material (15). [11] Sealing arrangement of pipes or shaft structures in superimposed components forming an annular gap, wherein a sealing ring (1) according to one of claims 1 to 10 is arranged in the annular gap.

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