DE6605187U - SEALING DEVICE FOR A ROTATING SHAFT. - Google Patents

Description

, '.' ...:, * .. *.: » ' " Esimburg, January 19, 1970

Applicant: Howaldtswerke-Deutsche Werft Aktiengesellschaft Hamburg und Kiel, 2 Hamburg 11, Postfach 1480

^ Sealing device for a rotating shaft

The present invention relates to a sealing device for shafts by means of at least one elastic sleeve, in particular for sealing against fluid media, wherein the sleeve comprises a radially extending retaining flange, which is arranged outside on its circumference, in cross ■ l cut circular bead has, and Pestlegen of

Bead two fixed to the housing braced against each other and directly supported on each other, the bead between them receiving parts are provided that only attack the bead, but not the retaining flange itself.

The aim of the invention is to create a sealing device in which the sealing collar is clamped in a manner which makes a deformation of the sealing lip by displacement of the retaining flange impossible.

Proposals have already been made earlier which deal with seals rotating shafts against liquid media, and in which elastic cuffs were used. In the subject of German Patent No. 878 364, for example, these cuffs were designed so that they had a flat, flange-like shape on their outer circumference, with which they were clamped between two housing parts in order to allow the media to be sealed to pass through at this point to prevent. It is well known that such flat gaskets require jp> gh i \ p * *

kIJ | §IÜ [2 -

ne NaoSwei. an Ȁ * en InSSJi oebOb.

g n also photocopies or photocopies supplied at the usual prices

(«■«) D «rtKh« Pottnhimi. Braedmmtenteß

DEUTSCHE WERFT - 2 -

HAMBURG

but on an area of different sizes »That can possibly a build-up of heat on the sealing surface between the shaft and sleeve, thus destroying the sleeve and as a result, lead to the seal becoming leaky, since the material of the cuff is a poor conductor of heat and thus the frictional heat generated at the sealing lip cannot be dissipated easily. The present one avoids these disadvantages Invention in that it provides means which exclude a change in shape of the sleeve and at the same time ensure secure sealing at the clamping point »

The solution to this problem is, according to the main feature of the invention, that the cuff has a Ring with a circular or similar profile for perfect Has clamping in the housing, which even if the housing parts are not completely clamped together by the The liquid pressure of the media to be sealed creates an automatic seal on the insert parts "causes",

Such a seal according to the invention also extols major structural advantages. The singing grooves required for clamping the sleeve in the housing parts are advantageously made equally strong for all shaft sizes, so that only one turning or milling tool is required for their manufacture.

In addition, the number of the housings to be saved together is parts required screws much less, because according to a further feature of the invention, the clamping of the cuffs only takes place with a low contact pressure The outer housing diameter is determined by the radial

OWSb 6jBX

DEUTSCHE WERFT - 3 -

HAMBURG

The very short construction of the clamping ring of the cuff is also considerably less than with conventional seals. The seal 7 / according to the invention is also considerably shorter in the axial direction, since the screws required to clamp the housing parts together no longer have to be passed through the sleeves and the housing parts, but are arranged above the clamping points, which enables a shorter construction of the entire seal. Due to the advantages described above, the seal according to the invention therefore allows very great savings in material and weight _ψ

Another feature of the invention is that the type of clamping of the ring profile on the outer circumference of the sleeve between the housing parts prevents deformation of the sleeve, so that it is ensured that the sealing j The lip of the cuff always lies on a line when sealing on the rotating shaft.

According to another feature of the invention, the H ^ R for the sin ^ tensioning of the ring profile between the housing parts is limited by the parts lying on top of each other in a metallic manner. This not only prevents the cuff from deforming, it also guarantees absolute tightness at the clamping point »

The invention is shown in the drawing, for example: Fig. 1 shows a longitudinal section through the seal

in the assembled state, Fig. 2 also shows a longitudinal section with disassembled

otherwise drawn housing parts without inserted

Cuffs "

DEUTSCHE WERFT - 4 -

HAMBURG

At one end of a housing 1, an intermediate ring 2 is guided in a bore and tightened with a cover 3, while the other end of the housing 1 is closed with a cover 4, which is preferably of the same size. The housing 1, the intermediate ring 2 and the cover 3 »^ are provided with ring-like grooves 5» 6 * 7 »8, 9i 10 of semicircular cross-section, which are used to accommodate profile rings 11, 12, 13 on the outer circumference of the sleeves 14, 15 _t 16 serve. The covers 3 »4 · are tightened on the housing 1 by means of screws 17 until the housing parts 1, 2, 3, 4 lie on top of one another at 18, 19, 20 at the same time as the UaP for the pressing together of the ring profiles 11, 12, 13 of the collars 14, The sealing against the rotating shaft, which is advantageously provided with a bushing 21 fastened to the shaft and encircling it, takes place in a manner known per se via the sealing lips 22, 23, 24 of the sleeves 14, 15, λ ei _ ^ - u ~ j jj "τ -! - ~ - ^ ..." - u 3t .- "^ j _A " oc oc on ",. · *" J {>"D .._ i ~ _n _.

21 are pressed and thus seal against them.

DW la Ä.61 X

Claims (1)

1) Abdichtun ^ svorricr-tvr.t; for a rotating shaft by means of a or neh.ror: r elastic strap, especially for sealing -ejen flUacige Iledien, where the LIanscLetten ".it a. rc.dia.1 egg, extending Ealteflrv-.cch r.it ei ... LLu.'eren UT.fc.nj, arranged. ■, 7 "lnt from :: reisfcr-i_-er. Or abjer-.r: later ^ uerschnitt Ter: s. '; He. εΐ: ΐο, rrC. fies or zv / i ^ cLcn j: e ': är.ief esten Sharing ^ olo- ^ ert, is marked by the fact that the "both, ioveils ropes engaging the V / ulst (11, 12, 13) (;, 2). (2,1), (1,4) Pit l-injfUr-iijen, ier Porn des ', / rlstes (11, 12, 13) er.tspr jcl; srden Av.sr.eV.r.-n ^ en (?, 8, »-J 1 ^) verce '-. En are. Aof.icl-tur ^ cvorricht ""': ^ n ^? H claim 1, el. By re ^T : enr -.-: ■ .--?; .-. Et, c ...;. das eir.e der Ier. Bulge (12) 3v.'ioc] .en r. ■ :: ~ ¹ ^ e '■ "" £.: A.er »parts cir. G-e '.. üuseteil (1) ur.d? .. c other • ~ in i ^ GchLiuse ⁷ : ofesti, ter Zv: i ^^ henrir.tj (2) iot. ..>: ä.Lc '.-. ^M: -.? ~ ^ ZY2 T ± ^j '. ^J : '- *: ^. rcch A ^ r ^ ruch 1 v.rd 1 ', d..I'.irch (11, o) Yawing. Γ-ile from nvvei -. ^ Geh "ube (1)" befactig- i. originally ** -_. , 'VH -. "» ~ V "'""""""T-" - "■ - mwi ·· wiu nwiinvii j« HV | MH | WIIItO I ^ UUIITOI3 CHIOS ΙΟ ^ ΠΙΙΙΟΙΒΙΙ ΙΠΙΘΓβ55βΧ QQDUfI- can be viewed free of charge. On request, photocopies or film negatives can also be delivered at the normal prices. G «344 (ί.ί?) DwhMhes Patent Office, Gebraadtsmustnstella 660518 "?