DE102018202691A1 - Power generator arrangement with cooling system - Google Patents

Abstract

A current generator arrangement (1) is described which includes a stator (2), a rotor (3), at least one cooler (10) for cooling an air flow from the stator (2) and / or the rotor (3) and at least one the blower (11) belonging to the radiator (10) with a blower box (20). The blower box (20) has a fan inlet (21) connected to the radiator (10) for receiving the airflow from the radiator (10) and two blower outlets (22a, 22b) for directing the airflow exiting the blow box (20) to two respectively opposite sides (4, 5) of the power generator arrangement (1).

Description

Field of the invention

The present invention relates to a power generator assembly comprising a stator, a rotor and a cooling system with at least one cooling fan. The present invention is particularly applicable to power generators associated with wind turbines.

General state of the art

Power generator assemblies of the above type and methods of operation therefor are well known. Each power generator assembly associated with a wind turbine includes a stator and a rotor and extends axially along an axis of rotation of the rotor about the stator. The power generator assembly extends axially between a drive side connected to the drive device (i.e., the rotor with blades of the wind turbine) and an axially opposed non-drive side.

The stator typically has a plurality of axially extending segments. The power generator assembly further includes a cooling system having a plurality of coolers. For example, each cooler can supply two segments. At each radiator, a ventilation device for generating an airflow flowing through the radiator is installed. In particular, the cooler absorbs an airflow that has been heated in the stator and in the rotor and releases a cooled airflow. By means of the venting device, this cooled air is blown to cool the power generator to the gap between the rotor and the stator and to the gaps between the stator segments.

It is known to provide a ventilation device having two radial fans installed on each radiator: a fan for delivering the cooled airflow exiting the radiator toward the drive side of the power generator and the other fan for delivering the cooled airflow exiting the radiator toward the non-drive side of the radiator power generator.

Such a solution is not optimal or it can be improved.

In particular, there is a need to provide a power generator assembly having a cooling system that generates an airflow with a more even distribution of flow rate and temperatures.

Brief description of the invention

This need can be met by the subject matter of the independent claim. Advantageous embodiments of the present invention are described in the dependent claims.

• - einen Stator,
• - einen Rotor,
• - zumindest einen Kühler zum Kühlen eines Luftstroms aus dem Stator und/oder dem Rotor,
• - zumindest ein zu dem Kühler gehörendes Gebläse, das einen Gebläsekasten aufweist,
• - wobei der Gebläsekasten eine mit dem Kühler verbundene Kühlerkontaktfläche zum Aufnehmen des Luftstroms aus dem Kühler aufweist und
• - wobei der Gebläsekasten zwei Gebläseauslässe zum Leiten des aus dem Gebläsekasten austretenden Luftstroms zu zwei sich gegenüberliegenden Seiten der Stromgeneratoranordnung aufweist.

A power generator arrangement according to the invention comprises the following:

• a stator,
• a rotor,
• at least one cooler for cooling an air flow from the stator and / or the rotor,
• at least one fan belonging to the radiator and having a fan box,
• - Wherein the fan box has a cooler contact surface connected to the radiator for receiving the air flow from the radiator, and
• - wherein the blower box has two blower outlets for directing the airflow exiting the blower box to two opposite sides of the power generator assembly.

• - die von nur einem Gebläse pro Kühler erzeugte Durchflussmenge und Temperaturverteilung sind bei der Stromgeneratoranordnung gleichmäßiger verteilt,
• - die allgemeine Komplexität des Systems verringert sich dadurch, dass nur ein Gebläse an jedem Kühler installiert werden muss; zum Einfassen des Gebläserads und zum Verbinden von Kühlern mit den Statorplatten kann ein sehr einfacher und wirtschaftlicher Gebläsekasten aus geraden Platten verwendet werden,
• - durch Verwendung nur eines Gebläses ist der Zusammenbau mit der Stromgeneratoranordnung. Ein einzelnes größeres Gebläserad und ein größerer Gebläsemotor können insbesondere seitlich herausgenommen werden.

The proposed fan box described above and its connection to the radiator have several advantages:

• the flow rate and temperature distribution generated by only one blower per radiator are more evenly distributed in the power generator arrangement,
• - The overall complexity of the system is reduced by the fact that only one blower must be installed on each radiator; For enclosing the impeller and for connecting radiators to the stator plates, a very simple and economical blower box made of straight plates can be used,
• - By using only one blower is the assembly with the power generator assembly. A single larger impeller and a larger blower motor can be taken out in particular laterally.

According to one embodiment of the invention, the power generator assembly extends along an axis of rotation of the rotor around the stator, the two fan outlets being adapted to direct the airflow exiting the fan box to two respective opposite axial sides of the power generator assembly. In one of the two opposite axial sides in particular is the drive side of the power generator assembly, while it is at the other axial side is about the non-drive side. The two blower outlets are advantageously each used to generate two air streams, which are passed to the drive side or to the non-drive side of the power generator arrangement.

According to a further embodiment of the invention, the stator is subdivided into a plurality of segments, wherein the at least one cooler belongs to one or more of the segments.

According to a further embodiment of the invention, the power generator arrangement comprises an impeller belonging to the blower fan and a blower connected to the electric motor. The fan motor may advantageously be aligned transversely or parallel to the axis of rotation, in the latter case, the installation of a particularly large motor is possible.

According to a further embodiment of the invention, the blower box has a removable plate which allows removal of the impeller and / or the blower motor from the power generator assembly. With the same simple and clearly defined fan box divider, various blower motors and blower wheels can be selected and used. Furthermore, various blower outputs can advantageously be installed on-site as needed: larger and more expensive blowers for warm locations and smaller, less expensive blowers for cool, less demanding locations.

The above-defined and other aspects of the present invention will become apparent from the embodiments described below and will be explained with reference to the embodiments. The invention will be described in more detail below with reference to exemplary embodiments, to which, however, it is not limited.

list of figures

• 1 shows a wind turbine with a power generator assembly according to an embodiment of the invention.
• 2 shows a schematic cross section through a power generator assembly according to an embodiment of the invention.
• 3 shows a schematic plan view of a component of the power generator arrangement 1 ,

Detailed description

1 shows a wind turbine according to the invention 100 , The wind turbine 100 includes a tower 101 which is built on a foundation, not shown. At the top of the tower 101 is a gondola 102 arranged.

The wind turbine 100 further includes a wind rotor 103 with three rotor blades 104 (in the perspective of 1 are only two rotor blades 104 to see). The wind rotor 103 is rotatable about a rotation axis Y. Unless otherwise indicated, the terms "axial", "radial" and "circumferentially" used below refer to the axis of rotation Y.

The rotor blades 104 extend radially with respect to the axis of rotation Y.

The wind turbine 100 includes a power generator assembly 1 with a stator 2 a rotor 3 and a cooling system 15 for generating an airflow in the power generator assembly 1 ,

The wind rotor 103 is about a rotatable shaft 109 with the rotor 3 rotationally connected. It is a schematically illustrated bearing arrangement 108 provided that both the wind rotor 103 as well as the rotor 3 holds in position. As in 1 can be seen, the rotatable shaft runs 109 along the axis of rotation Y.

The power generator arrangement 1 runs between an axial drive side 4 and an axially opposed non-drive side 5 along the axis of rotation Y. The drive side 4 is with the rotatable shaft 109 the wind turbine 100 connected. The rotation axis Y also corresponds to a rotation axis of the rotor 3 around the stator 2 ,

Between the rotor 3 and the stator 2 is an air gap 6 provided, which extends in the circumferential direction about the axis Y. The stator 2 has several (not shown in the accompanying figures) segments, between which a plurality of axially (not shown in the accompanying figures) stator gaps are arranged.

The power generator arrangement 1 will be described below with reference to the attached 2 described in more detail.

The cooling system 15 has at least one cooler 10 (in the embodiment in the accompanying 2 a cooler).

According to other embodiments of the present invention, the cooling system may include a plurality of coolers 10 exhibit. For example, each of the plurality of coolers may be provided for cooling some adjacent stator segments.

• - einen Gebläsekasten 20,
• - ein Gebläserad 23,
• - einen Gebläsemotor 24, der über eine Gebläsewelle 27 mit dem Gebläserad verbunden ist.

The cooling system 15 also has a to each cooler 10 belonging blower 11 on. The fan 11 indicates:

• - a blower box 20 .
• - an impeller 23 .
• - a blower motor 24 that was over a blower shaft 27 connected to the impeller.

In the embodiment in the accompanying 2 are the blower motor 24 and the fan shaft 27 aligned radially, ie perpendicular to the axis of rotation Y.

According to other possible embodiments, the blower motor 24 and the fan shaft 27 , Especially when the engine is sized larger, aligned parallel to the axis of rotation Y.

The fan box 20 connects the stator 2 , the cooler 10 and the blower wheel 23 where the cooler 10 in a direction perpendicular to the axis of rotation Y extending between the stator 2 and the blower wheel 23 is arranged.

That of the blower motor 24 operated impeller 23 creates one through the radiator 10 flowing airflow. The cooler 10 absorbs an airflow in the stator 2 and in the rotor 3 was heated, and gives off a cooled air flow. With the help of the blower wheel 23 This cooled air is used to cool the power generator assembly 1 to the gap 6 between the rotor and the stator and blown through the gaps between the stator segments.

The fan box 20 has a first opening 18 for connecting the fan box 20 with the stator 2 on. About the first opening 18 takes the cooler 10 the air flow in the stator 2 was heated. The fan box 20 also has one with the radiator 10 connected radiator interface 21 for picking up the cooler 10 exiting cooled airflow.

The fan box 20 also has two axially oppositely directed blower outlets 22a . 22b for guiding the out of the fan box 20 exiting air flow to the drive side 4 or to the non-drive side 5 the power generator assembly 1 on.

There are other configurations of the blower outlets 22a . 22b according to the further embodiment of the present invention possible, but with the two blower outlets 22a . 22b in all cases for guiding the out of the blow box 20 exiting air flow to two mutually opposite sides of the power generator assembly 1 are configured.

The fan box 20 has one of the first opening 18 of the fan box 20 opposite second opening 19 to the fan wheel 23 on.

In 3 is a top view of the fan box 20 shown. The fan box 20 has, as shown, a parallelepiped shape and is made of straight metal plates, which are used to enclose the impeller 23 and for connecting the radiator 10 with the stator 2 as well as with the blower wheel 23 and the blower outlets 22a . 22b be used.

The cooler 10 has the shape of a parallelepiped while the blower 23 is cylindrical. Thanks to the simple geometry of such components passing through the fan box 20 need to be connected, can avoid the blower box 20 must be designed as a distributor of complex form.

The fan box 20 has a removable plate 25 on, taking out the fan wheel 23 and the blower motor 24 from the power generator assembly 1 allows. By removing the removable plate 25 from the fan box 20 is granted access to the assembly coming from the impeller 23 and the blower motor 24 is formed, and this may be from the power generator assembly 1 be taken out. Removing the blower wheel 23 and the blower motor 24 may be in a radial direction with respect to the rotation axis Y If a big blower motor 24 is used and for a radial removal of the engine is not enough space available, the blower motor 24 (finally together with the blower wheel 23 ) after removing the removable plate 25 be removed in the circumferential direction.

Claims (10)

A power generator assembly (1) comprising: a stator (2), a rotor (3), at least one cooler (10) for cooling an air flow from the stator (2) and / or the rotor (3), at least one fan (11) belonging to the cooler (10) and having a fan box (20), - wherein the fan box (20) has a radiator interface (21) connected to the radiator (10) for receiving the air flow from the radiator (10) and - wherein the blower box (20) has two blower outlets (22a, 22b) for guiding the air flow emerging from the blower box (20) to two mutually opposite sides (4, 5) of the power generator arrangement (1). Current generator arrangement (1) according to Claim 1 wherein the power generator assembly (1) extends axially about the stator (2) along an axis of rotation (Y) of the rotor (3), the two fan outlets (22a, 22b) for directing the airflow exiting the fan box (20) to two each opposite axial sides (4, 5) of the power generator assembly (1) are designed. Current generator arrangement (1) according to Claim 2 in which one of the two mutually opposite axial sides (4, 5) is the drive side (4) of the power generator arrangement (1). Power generator arrangement (1) according to one of the preceding claims, wherein the stator (2) is divided into a plurality of segments, wherein the at least one cooler (10) belongs to one or more of the segments. Power generator assembly (1) according to any one of the preceding claims, wherein the power generator assembly (1) to the fan box (20) associated impeller (23) and a blower motor (23) connected to the blower motor (24). Current generator arrangement (1) according to Claim 5 , wherein the fan motor (24) is oriented transversely to the axis of rotation (Y). Current generator arrangement (1) according to Claim 5 , wherein the fan motor (24) is aligned parallel to the axis of rotation (Y). Power generator arrangement (1) according to Claims 5 to 7 wherein the fan box (20) comprises a removable plate (25) which allows the fan wheel (23) and / or the fan motor (24) to be removed from the power generator assembly (1). Wind energy plant (100) with a power generator arrangement (1) according to one of the preceding claims. A power generator assembly cooling system (15) comprising: at least one cooler (10) for cooling an air flow in the power generator arrangement (1), at least one fan (11) belonging to the cooler (10) and having a fan box (20), - wherein the fan box (20) has a with the cooler (10) connected to the blower inlet (21) for receiving the air flow from the radiator (10) and - wherein the blower box (20) has two blower outlets (22a, 22b) for guiding the air flow emerging from the blower box (20) to two mutually opposite sides (4, 5) of the power generator arrangement (1).

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