Method and arrangement for sealing off a separating gap, formed between a rotor and a stator, in a non-contacting manner
First Claim
1. A method for sealing off a separating gap formed between a rotor and a stator in a non-contacting manner from the throughflow of a working fluid admitted to the separating gap, comprising the steps of:
- forming in the working fluid, flow layers having different circumferential velocities;
choking the working fluid in the separating gap;
dividing the flow layers of the working fluid after the choking action into a first partial flow having a high circumferential velocity and a second partial flow having a low circumferential velocity;
deflecting the first partial flow;
swirling the second partial flow; and
directing the second partial flow parallel to the deflected first partial flow and into the first partial flow.
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Accused Products
Abstract
The object of the invention is to provide an improved method for sealing off the separating gap, formed between a rotor and a stator, in a non-contacting manner, with which method the service life of the components involved can be increased. In addition, an arrangement for carrying out the method is to be shown. According to the invention, this is achieved in that the flow layers (35, 36), having different circumferential velocities, of the working fluid (18) are divided after the choking action into a first partial flow (35'"'"') having a high circumferential velocity and a second partial flow (36'"'"') having a low circumferential velocity, the first partial flow (35'"'"') is merely deflected, only the second partial flow (36'"'"') is swirled and is finally directed parallel to the deflected first partial flow (35'"'"') into the latter. To this end, the opposing surface (24) of the choke point (22) is designed as a flow divider for the working fluid (18). The vortex chamber (23) adjoins the flow divider (24) and is arranged further upstream than the feed duct (29) for the next sealing element (21).
66 Citations
9 Claims
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1. A method for sealing off a separating gap formed between a rotor and a stator in a non-contacting manner from the throughflow of a working fluid admitted to the separating gap, comprising the steps of:
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forming in the working fluid, flow layers having different circumferential velocities; choking the working fluid in the separating gap; dividing the flow layers of the working fluid after the choking action into a first partial flow having a high circumferential velocity and a second partial flow having a low circumferential velocity; deflecting the first partial flow; swirling the second partial flow; and directing the second partial flow parallel to the deflected first partial flow and into the first partial flow. - View Dependent Claims (2)
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- 3. An arrangement sealing off a separating gap, formed between a rotor and a stator, in a non-contacting manner from the throughflow of a working fluid admitted to the separating gap in a main flow direction, in which arrangement at least one sealing element, consisting of a choke point, an opposing surface which is located on the stator and on which the working fluid impinges downstream of the choke point, and a vortex chamber, is arranged in the separating gap, and the separating gap is designed as a feed duct upstream of each sealing element and as a discharge duct downstream of the sealing element, wherein the opposing surface is designed as a flow divider for the working fluid, the vortex chamber is arranged in the opposite direction to the main flow direction, and the feed duct or the discharge duct are arranged so as to adjoin the flow divider in the main flow direction.
Specification