Wind power generator set, electromagnetic device, and heat exchange or drying device for iron core

Patent metadata

Field	Value
Publication number	US-11971015-B2
Application number	US-201917042169-A
Country	US
Kind code	B2
Filing date	May 9, 2019
Priority date	Aug 31, 2018
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

A wind power generator set, an electromagnetic device and a heat exchange or drying device for an iron core. The heat exchange or drying device for an iron core includes a sprayer capable of feeding an airflow, wherein the sprayer is provided with a spraying hole, and the airflow can be sprayed to an end of the iron core through the spraying hole. The sprayer sprays a cold airflow or a hot airflow at the end of the iron core, creating a cooling and drying environment at the end of the iron core. This facilitates the heat dissipation of the iron core and also the maintenance of the insulation performance of an end of a winding, including the insulation of the winding itself and the insulation between the winding and the iron core, and also the protection of a magnetic pole and a protective covering layer thereof.

First claim

The invention claimed is:

1. A heat exchange or drying device for an iron core, comprising:
a sprayer configured to introduce airflow,
wherein the sprayer is provided with spray holes, and the airflow is allowed to be sprayed to an end portion of the iron core through the spray holes, and
wherein the sprayer comprises an annular spray pipe matching with an annular shape of the iron core, the annular spray pipe is provided at the end portion of the iron core, and the spray holes are provided in a circumferential direction of the annular spray pipe.

2. The heat exchange or drying device according to claim 1 , wherein the annular spray pipe is mounted at the end face of the iron core.

3. The heat exchange or drying device according to claim 2 , wherein:
windings are accommodated in slots of the iron core, the end face of the iron core is provided with an annular busbar, and connectors of the windings are connected to the busbar; and
the annular spray pipe is located at an inner side or an outer side of the busbar or is arranged to axially face the busbar directly, and the annular spray pipe is configured to spray the airflow to the busbar.

4. The heat exchange or drying device according to claim 1 , wherein windings are accommodated in slots of the iron core, the windings are wound at the end portion of the iron core to form winding end portions, and the annular spray pipe is inserted into a through hole formed by all the winding end portions at the end portion of the iron core.

5. The heat exchange or drying device according to claim 1 , wherein:
two or more airflow inlets are evenly distributed at the annular spray pipe in the circumferential direction, and the airflow inlets are configured for introducing the airflow; and
an airflow dividing pipe is arranged inside the annular spray pipe at a position corresponding to one of the airflow inlets, the introduced airflow is allowed to enter into the airflow dividing pipe first, and the airflow dividing pipe is configured to spray the airflow from two ends, to guide the airflow to flow in the circumferential direction of the annular spray pipe and then be sprayed out from the spray holes.

6. The heat exchange or drying device according to claim 1 , wherein:
the spray holes are provided at an inner side of the annular spray pipe or both the inner side and an intermediate portion of the annular spray pipe, and no spray hole is provided at and an outer side of the annular spray pipe; and
the spray holes are configured to spray in at least one of a radial direction or an axial direction of the iron core.

7. An electromagnetic device, comprising:
an iron core;
a heat exchange or drying device, comprising:
a sprayer configured to introduce airflow,
wherein the sprayer is provided with spray holes, and the airflow is allowed to be sprayed to an end portion of the iron core through the spray holes, and
wherein the sprayer comprises an annular spray pipe matching with an annular shape of the iron core, the annular spray pipe is provided at the end portion of the iron core, and the spray holes are provided in a circumferential direction of the annular spray pipe.

8. The electromagnetic device according to claim 7 , wherein the annular spray pipe is mounted at the end face of the iron core.

9. The electromagnetic device according to claim 8 , wherein:
windings are accommodated in slots of the iron core, the end face of the iron core is provided with an annular busbar, and connectors of the windings are connected to the busbar; and
the annular spray pipe is located at an inner side or an outer side of the busbar or is arranged to axially face the busbar directly, and the annular spray pipe is configured to spray the airflow to the busbar.

10. The electromagnetic device according to claim 7 , wherein windings are accommodated in slots of the iron core, the windings are wound at the end portion of the iron core to form winding end portions, and the annular spray pipe is inserted into a through hole formed by all the winding end portions at the end portion of the iron core.

11. The electromagnetic device according to claim 7 , wherein:
two or more airflow inlets are evenly distributed at the annular spray pipe in the circumferential direction, and the airflow inlets are configured for introducing the airflow; and
an airflow dividing pipe is arranged inside the annular spray pipe at a position corresponding to one of the airflow inlets, the introduced airflow is allowed to enter into the airflow dividing pipe first, and the airflow dividing pipe is configured to spray the airflow from two ends, to guide the airflow to flow in the circumferential direction of the annular spray pipe and then be sprayed out from the spray holes.

12. The electromagnetic device according to claim 7 , wherein:
the spray holes are provided at an inner side of the annular spray pipe or both the inner side and an intermediate portion of the annular spray pipe, and no spray hole is provided at and an outer side of the annular spray pipe; and
the spray holes are configured to spray in at least one of a radial direction or an axial direction of the iron core.

13. A wind turbine, comprising:
a generator, comprising:
a stator;
an iron core associated with the stator; and
a heat exchange or drying device, comprising:
a sprayer configured to introduce airflow,
wherein the sprayer is provided with spray holes, and the airflow is allowed to be sprayed to an end portion of the iron core through the spray holes, and
wherein the sprayer comprises an annular spray pine matching with an annular shape of the iron core, the annular spray pipe is provided at the end portion of the iron core, and the spray holes are provided in a circumferential direction of the annular spray pine.

14. The wind turbine according to claim 13 , wherein the annular spray pipe is mounted at the end face of the iron core.

15. The wind turbine according to claim 14 , wherein:
windings are accommodated in slots of the iron core, the end face of the iron core is provided with an annular busbar, and connectors of the windings are connected to the busbar; and
the annular spray pipe is located at an inner side or an outer side of the busbar or is arranged to axially face the busbar directly, and the annular spray pipe is configured to spray the airflow to the busbar.

16. The wind turbine according to claim 13 , wherein windings are accommodated in slots of the iron core, the windings are wound at the end portion of the iron core to form winding end portions, and the annular spray pipe is inserted into a through hole formed by all the winding end portions at the end portion of the iron core.

17. The wind turbine according to claim 13 , wherein:
two or more airflow inlets are evenly distributed at the annular spray pipe in the circumferential direction, and the airflow inlets are configured for introducing the airflow; and
an airflow dividing pipe is arranged inside the annular spray pipe at a position corresponding to one of the airflow inlets, the introduced airflow is allowed to enter into the airflow dividing pipe first, and the airflow dividing pipe is configured to spray the airflow from two ends, to guide the airflow to flow in the circumferential direction of the annular spray pipe and then be sprayed out from the spray holes.

18. The wind turbine according to claim 13 , wherein:
the spray holes are provided at an inner side of the annular spray pipe or both the inner side and an intermediate portion of the annular spray pipe, and no spray hole i

Assignees

• Beijing Goldwind Science & Creation Windpower Equipment Co Ltd

Inventors

• Ma Shengjun

Classifications

• F03D80/60 Primary

  Cooling or heating of wind motors · CPC title

• F03D9/25

  the apparatus being an electrical generator (F03D9/22 takes precedence) · CPC title

• H02K3/24 Primary

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

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K7/1838

  Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine · CPC title