Flow machine, slide ring seal thereof, body part for said slide ring seal and method of fastening said slide ring seal to said flow machine

Abstract

Disclosed is a slide ring seal, which is used, for example, for sealing a shaft space of a centrifugal pump in relation to a pumping space thereof and to centering the mechanical seal and/or fastening the seal to the casing of the centrifugal pump and a body part used for the attachment. A feature of the disclosed seal, including at least one rotary slide ring unit, a body part by means of which the seal is attached to the casing, and at least one either separate counter ring unit or a counter ring unit stationarily attached to the body part, is that the body part is provided with inclined fastening means by means of which the body part ( 40, 40 ′) is tightened to the casing both axially and radially.

1 .- 12 . (canceled) 
     
     
         13 . A flow machine, comprising a rotary shaft ( 18 ) and a member ( 16 ) at least for the slide ring seal enclosing the shaft ( 18 ), characterized in that inclined fastening means ( 50 ) is arranged to said member ( 16 ) for tightening the slide ring seal to said member ( 16 ). 
     
     
         14 . Flow machine in accordance with  claim 13 , characterized in that a substantially cylindrical guiding surface ( 44 ) is arranged to the inner surface of said member for positioning the seal radially and that a shoulder ( 46 ) for positioning the seal axially is arranged at the inner surface of said member or at least in connection with said member. 
     
     
         15 . Flow machine in accordance with  claim 13 , characterized in that said fastening means is a non-threaded hole ( 50 ). 
     
     
         16 . Flow machine in accordance with  claim 13 , characterized in that a slide ring seal is arranged inside said member ( 16 ), the body part ( 40 ,  40 ′) of which has an inclined threaded hole ( 52 ). 
     
     
         17 . Flow machine in accordance with  claim 13 , characterized in that said fastening means in the member ( 16 ) is a threaded hole. 
     
     
         18 . Flow machine in accordance with  claim 17 , characterized in that a slide ring seal is arranged inside said member ( 16 ), the body part of which has means for tightening the body part inside said member ( 16 ). 
     
     
         19 . Flow machine in accordance with  claim 18 , characterized in that said tightening means of the body part is a recess in the body part, a substantially circumferential groove or a blind hole. 
     
     
         20 . Flow machine in accordance with  claim 13 , characterized in that an actuator used with the fastening and tightening means is a screw ( 54 ), by means of which a slide ring seal is tightened via its body part ( 40 ,  40 ′) to its housing both axially and radially. 
     
     
         21 . Flow machine in accordance with  claim 13 , characterized in that a slide ring seal is arranged inside said member, in the body part ( 40 ,  40 ′) of which seal there is a shoulder ( 48 ) or an end surface operating together with a shoulder ( 46 ) of the member( 16 ) for positioning the seal inside said member ( 16 ). 
     
     
         22 . Flow machine in accordance with  claim 13 , characterized in that said member ( 16 ) is a casing of a centrifugal pump or a cover of the casing. 
     
     
         23 . Flow machine in accordance with  claim 13 , characterized in that a sealing water conduit ( 60 ,  60 ′) is arranged in the member ( 16 ) for supplying the sealing water to the slide ring seal. 
     
     
         24 . Flow machine in accordance with  claim 13 , characterized in that an opening ( 62 ) has been arranged to the body part ( 40 ′) for supplying sealing water to a shaft space ( 14 ). 
     
     
         25 . A method of tightening a slide ring seal via its body part ( 40 ,  40 ′) to a member ( 16 ) surrounding a shaft ( 18 ) of a flow machine, characterized in that said body part ( 40 ,  40 ′) is tightened to the inside of said member ( 16 ) in such a way that the tightening takes place concurrently both radially and axially. 
     
     
         26 . Method in accordance with  claim 25 , characterized in that said tightening is carried out by pulling the body part ( 40 ,  40 ′) of the slide ring seal along the guiding surface ( 44 ) in the member ( 16 ) in such a way that a shoulder ( 48 ) or like of the body part ( 40 ,  40 ′) and a shoulder ( 46 ) or like of the member ( 16 ) are pressed against each other. 
     
     
         27 . Method in accordance with  claim 25 , characterized in that said tightening is carried out by pushing the body part of the slide ring seal along the guide surface in the member ( 16 ) in such a way that the shoulder or like of the body part and the shoulder of the member ( 16 ) are pressed against each other.