DE102014011379A1 - Seal between two mutually moving surfaces - Google Patents

Abstract

The invention provides a seal advantageous according to the invention between two mutually moving surfaces. A first surface of the two mutually moving surfaces has a groove with two opposite groove flanks and a groove bottom. Within the groove two spaced sealing elements are arranged. A first sealing element of the seal bears against a first groove flank of the groove and on a second surface of the two mutually moving surfaces. A second sealing element of the seal bears against a second groove flank of the groove and the second surface of the two mutually moving surfaces. The first sealing element and the second sealing element of the seal are interconnected by means of at least one elastic web of the seal. The elastic web is supported relative to the groove bottom of the groove, whereby the first sealing element rests against the first groove flank and on the second surface, and the second sealing element rests against the second groove flank and the second surface.

Description

Technical area

The present invention relates to a seal between two mutually moving surfaces according to the features of patent claim 1.

State of the art

Contact seals on mutually moving surfaces are known from the prior art in order to prevent unwanted material passage between adjacent spaces. For this purpose, in addition to gland seals mechanical seals are known in particular.

From the patent DE 1 224 106 B a sealing ring made of elastic material is known, which is arranged for sealing between a wave-shaped part and a relatively rotatable, substantially radial counter-sealing surface. The sealing ring has an annular recess, whereby a sealing lip and a fastening ring are formed. Due to the bias of the mounting ring in the installed state of the sealing ring, the lip is axially spread apart and abuts against the counter-sealing surface. In a further development, the sealing ring on two incisions, wherein the sealing lips formed thereby abut against two slightly conical walls of a groove and the fastening ring is located on the shaft between the lips.

From the translation of the European patent specification DE 699 16 071 T2 is a made of elastic deformable material double sealing ring in a unitary construction for sealing two substantially flat surfaces. The double sealing ring comprises two coplanar sealing rings, which are connected to one another by means of a web and the web has at least one opening. Between the two sealing rings, a gap volume is formed, wherein the web divides the gap volume in an upper and a lower part. The openings in the bridge provide a connection between the upper and lower part.

Object of the invention

The object of the invention is to provide an improved seal between two mutually moving surfaces.

Solution of the task

The object is achieved by a seal between two mutually moving surfaces according to the features of claim 1. Advantageous developments emerge from the subclaims and the embodiment.

Description of the invention

The invention provides an inventively advantageous seal between two mutually moving surfaces, wherein the two surfaces are aligned opposite each other with a substantially constant distance. A first surface of the two mutually moving surfaces has a groove with two opposite groove flanks and a groove bottom. Within the groove two spaced sealing elements are arranged. A first sealing element of the seal bears against a first groove flank of the groove and on a second surface of the two mutually moving surfaces. A second sealing element of the seal bears against a second groove flank of the groove and the second surface of the two mutually moving surfaces. The first sealing element and the second sealing element of the seal are interconnected by means of at least one elastic web of the seal. The elastic web is supported relative to the groove bottom of the groove, whereby the first sealing element bear against the first groove flank and on the second surface and the second sealing element against the second groove flank and the second surface.

The groove is advantageously designed as a straight groove, wherein the first groove flank and the second groove flank are arranged parallel to each other and the groove base to the first groove flank and the second groove flank is arranged at right angles. The web is advantageously designed as a web connected in the longitudinal direction of the web with at least one recess. Alternatively, the web may comprise a plurality of separate web elements, which are arranged spaced apart in the longitudinal direction of the groove and thus forms a recess in each case between two adjacent separate web elements.

In an advantageous further development of the seal, the first sealing element and the second sealing element are raised by means of the elastic web with respect to the groove base. The web is designed to be curved with respect to its cross section in the direction of the groove base, on the one hand with the first sealing element, on the other hand connected to the second sealing element and is located centrally on the groove bottom.

In a particularly advantageous further development of the seal, a pressure space is formed between the first sealing element, the second sealing element, the groove and the second surface. Accordingly, the pressure chamber is bounded by the first sealing element, the second sealing element, the first groove flank, the second groove flank, the groove base and the second surface, wherein the first sealing element at least partially on the first groove flank and the second sealing element at least partially on the second groove flank abut a surface contact. The second surface and / or the groove bottom have at least one pressure medium feedthrough. By introducing pressure medium via the at least one pressure medium feedthrough into the pressure chamber, the first sealing element is pressed against the first groove flank and against the second surface and the second sealing element is pressed against the second groove flank and the second surface. This increases the sealing effect of the seal.

In an advantageous further development of the seal, the second surface has at least one pressure medium feedthrough and the groove base has at least one pressure medium feedthrough. By introducing pressure medium under pressure via a first pressure medium feedthrough of the pressure medium feedthroughs into the pressure chamber, the first sealing element is pressed against the first groove flank and against the second surface and the second sealing element is pressed against the second groove flank and the second surface. This increases the sealing effect of the seal.

By applying pressure medium via a second pressure medium feedthrough of the pressure medium feedthroughs from the pressure chamber, a pressure medium transfer between two mutually moving surfaces is provided. In this case, the pressure medium transfer from the first surface, in particular the groove via the pressure chamber to the second surface or in the opposite direction from the second surface via the pressure medium space to the first surface, in particular the groove.

In an advantageous further development of the seal, the groove is designed as a trapezoidal groove, wherein the first groove flank and the second groove flank are arranged obliquely to each other and results in a groove shape opening from the groove bottom to the first surface. By introducing pressure medium under pressure, the contact pressure of the first sealing element and the second sealing element to the second surface and thus the sealing effect of the seal can be further increased.

In an advantageous embodiment, the seal between two mutually moving surfaces of a shaft and a shaft bearing is arranged, wherein the shaft and the shaft bearing are mutually rotatably and / or axially displaceably mounted. The surfaces are formed by an outer circumferential surface of a shaft and by an inner circumferential surface of a shaft bearing and the groove designed as a circumferential groove. In this case, the first surface may be formed as the outer lateral surface of the shaft and the second surface as the inner lateral surface of the shaft bearing or the first surface as the inner circumferential surface of the shaft bearing and the second surface as the outer circumferential surface of the shaft. Outer shell surface and inner shell surface are aligned with each other and arise from the lateral surface of a mainly cylindrical member having an axis of symmetry, wherein the outer circumferential surface facing away from the axis of symmetry surface and the inner circumferential surface is a surface facing the symmetry axis.

In an advantageous further development of the embodiment, the outer lateral surface of the shaft has at least one pressure medium feedthrough and the inner lateral surface of the shaft bearing has a pressure medium feedthrough. As a result, a pressure medium transfer between the shaft and the shaft bearing is provided, wherein the pressure medium is passed from the shaft via the pressure chamber to the shaft bearing or shaft bearing on the pressure chamber to the shaft.

The present invention thus provides an improved seal between two mutually moving surfaces, which can be inexpensively manufactured with improved sealing action and enables safe and easy assembly.

embodiment

By way of example, an embodiment of the seal according to the invention between two mutually moving surfaces is shown here. In the accompanying figure shows:

1 : a schematic representation of a seal 1 between a wave 2 and a shaft bearing 3 ,

In an advantageous embodiment, shown in FIG 1 , is the seal 1 between an outer circumferential surface 4 the wave 2 and an inner circumferential surface 5 of the shaft bearing 3 arranged, with the shaft 2 and the shaft bearing 3 are mounted rotatably to each other and / or axially displaceable. On the outer surface 4 the wave 2 is a circumferential groove 6 with a first groove flank 7 , one to the first groove flank 7 opposite second groove flank 8th and a groove bottom 9 arranged. Inside the groove 6 are a first sealing element 10 the seal 1 and one to the first sealing element 10 spaced second sealing element 11 the seal 1 arranged, wherein the first sealing element 10 at the first groove flank 7 and on the inner circumferential surface 5 and the second sealing element 11 on the second groove flank 8th and the inner circumferential surface 5 is applied. The first sealing element 10 and the second sealing element 11 are by means of at least one elastic web 12 the seal 1 connected with each other. The elastic bridge 12 is opposite the groove bottom 9 supported and has at least one recess 17 on.

Between the groove 6 , the two sealing elements 10 . 11 and the inner circumferential surface 5 becomes a pressure room 13 formed, which with pressure medium 14 can be acted upon, wherein the groove bottom 9 a first pressure medium feedthrough 15 and the inner circumferential surface 5 a second pressure medium feedthrough 16 having. This creates a pressure medium transfer between the shaft 2 and the shaft bearing 3 provided, wherein the pressure medium 14 over the first pressure medium supply 15 from the wave 2 in the pressure room 13 and on the second pressure medium feedthrough 16 from the pressure room 13 in the shaft bearing 3 , or the pressure medium 14 over the second pressure medium supply 16 from the shaft bearing 3 in the pressure room 13 and on the first printing medium feedthrough 15 from the pressure room 13 into the wave 2 is directed. Next be by applying the pressure chamber 13 with pressure medium 14 the first sealing element 10 to the first groove flank 7 and to the inner circumferential surface 5 and the second sealing element 11 to the second groove flank 8th and to the inner circumferential surface 5 pressed.

LIST OF REFERENCE NUMBERS

1

poetry

2

wave

3

shaft bearing

4

Outer casing surface

5

Inner surface area

6

groove

7

first groove flank

8th

second groove flank

9

groove base

10

first sealing element

11

second sealing element

12

web

13

pressure chamber

14

lever

15

first pressure medium feedthrough

16

second pressure medium feedthrough

17

recess

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 1224106 B [0003]
• DE 69916071 T2 [0004]

Claims (5)

Seal between two mutually moving surfaces, wherein a first surface has a groove with two opposite groove flanks and a groove bottom, and within the groove two spaced-apart sealing elements are arranged, wherein a first sealing element on a first groove flank and a second surface and a second sealing element abuts a second groove flank and the second surface by at least one elastic web connects the first sealing element and the second sealing element with each other and is supported against the groove bottom. Seal according to claim 1, characterized in that the first sealing element and the second sealing element are raised by means of the elastic web with respect to the groove bottom. Seal according to one of the preceding claims, characterized in that between the first sealing element, the second sealing element, the groove and the second surface, a pressure chamber is formed and the second surface and / or the groove bottom has at least one Druckmitteldurchführung. Seal according to one of the preceding claims, characterized in that is pressed by introducing pressure medium via the at least one Druckmitteldurchführung in the pressure chamber, the first sealing element to the first groove flank and the second surface and the second sealing element to the second groove flank and the second surface. Seal according to one of the preceding claims, characterized in that the surfaces are formed by an outer circumferential surface of a shaft and an inner circumferential surface of a shaft bearing and the groove is designed as a circumferential groove, wherein the first surface than the outer surface of the shaft and the second surface than the Inner lateral surface of the shaft bearing or the first surface as the inner circumferential surface of the shaft bearing and the second surface is formed as the outer circumferential surface of the shaft.

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