Separated coolant circulation structure for water-cooled power generator and cooling method thereof

Patent metadata

Field	Value
Publication number	US-9985489-B2
Application number	US-201514629070-A
Country	US
Kind code	B2
Filing date	Feb 23, 2015
Priority date	Feb 21, 2014
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A separated coolant circulation structure for a water-cooled power generator includes a cooling circulation channel for a stator bar to cool heat of a stator bar winding, and a cooling circulation channel for a connector ring to heat of a connector ring, wherein the cooling circulation channel for the stator bar and the cooling circulation channel for the connector ring form separate coolant supply paths to improve cooling efficiency and reduce a pump load.

First claim

What is claimed is:

1. A separated coolant circulation structure for a water-cooled power generator, comprising:
a cooling circulation channel for a stator bar including a first coolant supply path that is configured to cool heat of a stator bar winding; and
a cooling circulation channel for a connector ring including a second coolant supply path that is configured to cool heat of a connector ring,
wherein the first coolant supply path is separated from the second coolant supply path, the first coolant supply path is connected to a first coolant discharge ring, and the second coolant supply path is connected to a second coolant discharge ring to improve cooling efficiency and reduce a pump load.

2. The separated coolant circulation structure according to claim 1 , wherein the cooling circulation channel for the stator bar includes an annular coolant supply ring for a collector end which is connected to a coolant inlet pipe, through which a coolant flows;
a stator inner channel for supplying the coolant to the stator winding, of which an inlet terminal positioned at a collector end side is connected to the coolant supply ring for the collector end; and
an annular coolant discharge ring for a turbine end configured as the first coolant discharge ring and connected to an outlet terminal of a turbine end side of the stator inner channel.

3. The separated coolant circulation structure according to claim 2 , wherein the stator inner channel includes an upper channel passing an upper winding and a lower channel passing a lower winding, and
the upper channel and the lower channel respectively form a flow of the coolant in the same direction from the collector end side to the turbine end side.

4. The separated coolant circulation structure according to claim 3 , wherein the cooling circulation channel for the connector ring includes the coolant supply ring for the collector end,
a connector ring outer channel for annually enclosing a circumference of the connector ring, of which an inlet terminal is connected to the coolant supply ring for the collector end to receive the coolant, and
an annular coolant discharge ring for the collector end configured as the second coolant discharge ring and connected to an outlet terminal of the connector ring outer channel.

5. The separated coolant circulation structure according to claim 4 , wherein an inlet terminal of the stator inner channel is connected to the coolant supply ring for the collector end by at least one of a first set of coupling hoses,
an inlet terminal of the connector ring outer channel is connected to the coolant supply ring for the collector end by at least one of a second set of coupling hoses, and
an outer terminal end of the connector ring outer channel is connected to the coolant discharge ring for the collector end by at least one of a third set of coupling hoses.

6. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one first coupling hose, of which one end is connected to the coolant supply ring for the collector end to receive the coolant, and the other end is branched into a first outlet port and a second outlet port, and
the first outlet port and the second outlet port are respectively connected to the lower channel and the upper channel to feed the coolant into the lower and upper channels.

7. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one fourth coupling hose, of which one end is connected to the coolant supply ring for the collector end to receive the coolant, and the other end is branched into a first outlet port and a second outlet port, and
the first outlet port and the second outlet port are respectively connected to the lower channel and the upper channel to feed the coolant into the lower and upper channels.

8. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one third coupling hose,
the second set of coupling hoses includes at least one second coupling hose,
the third coupling hose and the second coupling hose are connected to the coolant supply ring for the collector end at each end to receive the coolant,
the coolant fed through the third coupling hose is supplied to the lower channel, and
the coolant fed through the second coupling hose is supplied to the connector ring outer channel.

9. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one sixth coupling hose,
the second set of coupling hoses includes at least one fifth coupling hose,
the fifth coupling hose and the sixth coupling hose are connected to the coolant supply ring for the collector end at each end to receive the coolant,
the coolant fed through the sixth coupling hose is supplied to the upper channel, and
the coolant fed through the fifth coupling hose is supplied to the connector ring outer channel.

10. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one third coupling hose;
the third set of coupling hoses includes at least one seventh coupling hose;
one end of the third coupling hose is connected to the coolant supply ring for the collector end to receive the coolant from the coolant supply ring for the collector end, and the other end is connected to the lower channel to supply the coolant to the lower channel; and
one end of the seventh coupling hose is connected to the outlet terminal of the connector ring outer channel to receive the coolant from the connector ring outer channel, and the other end is connected to the coolant discharge ring for the collector end to discharge the coolant to the coolant discharge ring for the collector end.

11. The separated coolant circulation structure according to claim 5 , wherein the first set of coupling hoses includes at least one sixth coupling hose;
the third set of coupling hoses includes at least one eighth coupling hose;
one end of the eighth coupling hose is connected to the coolant supply ring for the collector end to receive the coolant from the coolant supply ring for the collector end, and the other end is connected to the upper channel to supply the coolant to the upper channel; and
one end of the eighth coupling hose is connected to the outlet terminal of the connector ring outer channel to receive the coolant from the connector ring outer channel, and the other end is connected to the coolant discharge ring for the collector end to discharge the coolant to the coolant discharge ring for the collector end.

12. The separated coolant circulation structure according to claim 5 , wherein the connector ring outer channel is provided in plural in such a way that some portions are formed in an annularly cut shape, thereby enclosing the circumference of the connector ring,
each inlet terminal of the connector ring outer channels is connected to the coolant supply ring for the collector end by the second set of coupling hoses to receive the coolant, and
each outlet terminal is connected to the coolant discharge ring for the collector end by the third set of coupling hose to discharge the coolant.

13. The separated coolant circulation structure according to claim 3 , wherein an outlet terminal of the stator inner channel at the turbine end side of the upper and lower channels is connected to the coolant discharge ring for the turbine end by the plurality of ninth coupling hoses,
one end of the ninth coupling hose is divided to a first inlet port and a second inlet

Assignees

• Doosan Heavy Ind & Construction Co Ltd

Inventors

• Lee Hakjae

Classifications

• H02K9/197

  in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator · CPC title

• H02K3/24 Primary

  with channels or ducts for cooling medium between the conductors · CPC title

• H02K3/22 Primary

  consisting of hollow conductors · CPC title

• H02K9/28

  Cooling of commutators, slip-rings or brushes e.g. by ventilating · CPC title

• H02K1/20

  with channels or ducts for flow of cooling medium · CPC title