Sealing device for turbomachines
A sealing device is described, for separating a first compartment from a second compartment in a turbomachine, a wet gas being processed in the first compartment. The sealing device comprises a rotary component and a stationary component. A sealing member is arranged between the rotary component and the stationary component. The device further comprises an annular wet-particles collector and an oil-jet element, mounted on the rotary component for rotation therewith. The oil-jet element is surrounded by the annular wet-particles collector, such that wet particles contacting the oil-jet element are projected by centrifugal force into the annular wet-particles collector.
1. A sealing device for separating a first compartment from a second compartment, the sealing device comprising:
a rotary component;
a stationary component;
at least a first sealing member between the rotary component and the stationary component;
an annular wet-particles collector;
an oil-jet element, mounted on the rotary component for rotation therewith, the oil-jet element being surrounded by the annular wet-particles collector, such that wet articles contacting the oil-jet element are projected by centrifugal force into the annular wet-particles collector; and
a dry-gas delivery port, arranged for delivering dry gas between the rotary component and the stationary component towards the first sealing member;
wherein the first sealing member is arranged between the first compartment and the oil-j et element.
2. The device of claim 1 , wherein the dry-gas delivery port is arranged between the oil-jet element and the second compartment.
3. The device of claim 1 , wherein the oil-jet element is an oil-jet ring.
4. The device of claim 3 , wherein the oil-jet ring has a peripherally sharp edge for facilitating the wet particles projection in the annular wet-particles collector.
5. The device of claim 1 , wherein the first sealing member comprises a plurality of circumferential teeth forming a labyrinth seal adjacent the oil-jet element.
6. The device of claim 5 , wherein the circumferential teeth are arranged on the rotary component for rotation therewith.
7. The device of claim 1 , wherein the first sealing member comprises at least one helical projection arranged on the rotary component for rotation therewith.
8. The device of claim 1 , further comprising a second sealing member between the rotary component and the stationary component, arranged between the oil-jet element and the second compartment.
9. The device of claim 8 , wherein the second sealing member comprises a plurality of circumferential teeth forming a labyrinth seal adjacent the oil-jet element.
10. The device of claim 9 , wherein the plurality of circumferential teeth of the second sealing member are arranged on the rotary component for rotation therewith.
11. The device of claim 8 , wherein the second sealing member comprises at least one helical projection arranged on the rotary component for rotation therewith.
12. The device of claim 8 , wherein the dry-gas delivery port is arranged between the second compartment and the second sealing member.
13. A wet-gas compressor comprising:
a casing;
at least one impeller arranged for rotation in a first compartment in the casing;
at least a second compartment housing at least one contaminant-sensitive component; and
a sealing device arranged between the first compartment and the second compartment, the sealing device comprising:
a rotary component;
a stationary component;
at least a first sealing member between the rotary component and the stationary component;
an annular wet-particles collector;
an oil-jet element, mounted on the rotary component for rotation therewith, the oil-jet element being surrounded by the annular wet-particles collector, such that wet articles contacting the oil-jet element are projected by centrifugal force into the annular wet-particles collector; and
a dry-gas delivery port, arranged for delivering dry gas between the rotary component and the stationary component towards the first sealing member;
wherein the first sealing member is arranged between the first compartment and the oil-jet element.
14. A method for separating a first compartment from a second compartment, wherein a process gas containing contaminants is processed in the first compartment and a contaminant-sensitive component is housed in the second compartment; the method comprising:
providing a stationary component and a rotary component between the first compartment and the second compartment;
arranging at least a first sealing member between the first compartment and the second compartment;
arranging an annular wet-particles collector between the first compartment and the second compartment, the annular wet-particles collector surrounding the rotary component;
arranging an oil-jet element on the rotary component for rotation therewith, between the first sealing member and the second compartment, the oil-jet element being surrounded by the annular wet-particles collector;
rotating the rotary component and the oil-jet element therewith;
collecting contaminants with the oil-jet element and projecting by centrifugal force the contaminants with the oil-jet element into the annular wet-particles collector;
arranging a dry-gas delivery port between the second compartment and the first sealing member; and
delivering dry gas through the dry-gas delivery port towards the first sealing member.
15. The method of claim 14 , further comprising the following step:
arranging a second sealing member between the oil-jet element and the second compartment, the dry-gas delivery port being arranged between the second compartment and the second sealing member.
16. The method of claim 14 , wherein the first sealing member comprises at least one helical projection arranged on the rotary component for rotation therewith, the method further comprising the step of forwarding dry gas from the dry-gas delivery port towards the first compartment by rotating the helical projection.
17. The method of claim 15 , wherein the second sealing member comprises at least one helical projection arranged on the rotary component for rotation therewith, the method further comprising the step of forwarding dry gas from the dry-gas delivery port towards the oil-jet element by rotating the helical projection.
18. The device of claim 1 , wherein the device is in a turbomachine.
19. The compressor of claim 13 , wherein the device is in a turbomachine.
20. The device of claim 14 , wherein the method is in a turbomachine.