WO2011128450A1

WO2011128450A1 - Compact electricity generator set

Info

Publication number: WO2011128450A1
Application number: PCT/EP2011/056059
Authority: WO
Inventors: Claude Ascoet
Original assignee: Sdmo Industries
Priority date: 2010-04-16
Filing date: 2011-04-15
Publication date: 2011-10-20
Also published as: EP2558695A1; CN102933814A; FR2958973A1; CN102933814B; EP2558695B1; FR2958973B1

Abstract

The invention relates to an electricity generator set comprising a casing (10) extending in a longitudinal direction; a combustion engine (3) mounted on the casing (10); an alternator (2) mounted on the casing (10) and connected to the said combustion engine (3) in order to be able to convert the energy received from the combustion engine (3) into electrical energy; a control and connection housing (1) connected to said alternator; at least one air intake aperture (6; 7)allowing air into said casing (10), characterized in that it comprises at least one air diffuser (4; 5) mounted on a side wall of said casing (10) between an air inlet aperture (6; 7) and said combustion engine (3).

Description

Compact generator

1. Technical field of the invention

The invention relates to a generator comprising a motor, an alternator and a control unit. The invention relates more particularly to compact generating sets.

2. Technological background

A generator is an autonomous device for producing electrical energy from a heat engine. A generator makes it possible either to mitigate a power outage of the public grid, or to supply electrical appliances in areas without access to the public electricity grid.

A generating set comprises in known manner:

- a chassis,

a heat engine mounted on the chassis,

an alternator mounted on the chassis and connected to the heat engine so as to transform the energy received from the heat engine into electrical energy,

a control and connection box connected to the alternator; at least one air inlet in the cover for supplying the heat engine.

The air inlet in the hood allows an air supply of the engine. However, this air intake passes the noise generated by the engine and the alternator. Also, it is known to move the engine air intake to limit the noise perceived by a user of such a generator.

It is also known to limit the noise perceived by a user to spare inside the hood tortuous air supply circuits arranged between the air inlet and the engine or the alternator. These circuits are sometimes referred to as sound insulation baffles.

One of the main disadvantages of such a solution is congestion Generator set. In particular, the presence of these tortuous supply paths increases the overall size of the generator except for presenting poor sound insulation. More generally, it is desirable to keep the engine and the air inlets as far away as possible in order to reduce noise pollution.

In particular, the European directive 2000/14 / EC imposes a maximum sound level that must not exceed a generator to be able to be labeled as compatible with this directive.

Therefore, there is today an incompatibility between compactness and acceptable sound level.

3. Objectives of the invention

Therefore, the invention aims to overcome at least some of the disadvantages of the generators of the state of the art.

In particular, the invention aims to provide, in at least one embodiment, a compact and reduced noise level generator, compatible in particular with the European Directive 2000/14 / EC.

The invention also aims to provide, in at least one embodiment, a generator having a reduced longitudinal size.

The invention also aims to provide, in at least one embodiment, a compact generator that allows easy access to all the members of the generator.

The invention also aims to provide, in at least one embodiment, a compact generator whose noises of the alternator are attenuated.

4. Presentation of the invention

To do this, the invention relates to a generating set extending in a longitudinal direction having at least one air inlet, and mounted on a frame carrying successively, in said longitudinal direction:

a cover extending along a longitudinal direction,

a heat engine mounted on the chassis,

an alternator mounted on the chassis and connected to said engine to be able to transform the energy received from the heat engine into electrical energy,

a control and connection box connected to the alternator, in the vicinity of said air intake port,

characterized in that it comprises at least one air diffuser mounted on a side wall of said hood and extending substantially in said longitudinal direction, so as to direct the air transversely from said air intake port to said thermal motor.

A generator according to the invention can therefore be free of sound insulation baffles, and thus have a reduced longitudinal size. In particular, according to the invention, the group comprises at least one air diffuser formed on a side wall of the hood. This diffuser extends substantially horizontally, guiding the air introduced by the hearing along the side wall, in the vicinity of the zone carrying the alternator, to the engine. This allows in particular to limit the return of the engine noise to the air inlet, and thus to limit the noise perceived by a user. Such an air diffuser makes it possible to mix the air present in the hood, in particular the air carrying the noise generated by the engine, with outside air. Such an air diffuser can also cause turbulence that disrupts the return of the engine air to the outside.

The invention is an effective alternative to thermal insulation baffles by having the additional advantage of not increasing the overall size of the generator. Therefore, a generator according to the invention makes it possible to reconcile two requirements a priori antinomic: reduced overall size and an acceptable noise level.

The air diffuser not only provides power to the engine and limits the return of engine noise, but also allows the generator to be cooled.

The hood of a generator set according to the invention can be of any type. It may for example be substantially parallelepipedal and made of a metallic material. It can if necessary be adapted to be movable by traction on the ground, or with the aid of a forklift, and / or be mounted on wheels to make it easier to move. It may include one or more doors to access the inside of the hood.

Advantageously and according to the invention, the cover comprises at least one side access door inside the cover forming a portion of said side wall of said cover.

Such a side door makes easy access to different organs of the generator. In particular, such a door allows for example a replacement of a diode bridge of the alternator.

According to an advantageous variant of the invention, the door is mounted on the hood so that it can rotate 180 ° from a closed position in which it prevents access to the inside of the hood to an open position in which allows access to the inside of the hood.

Advantageously and according to the invention, at least one side door carries an air diffuser.

A generator according to this variant has a door naturally reinforced by the presence of the air diffuser making the door less sensitive to the risk of deterioration.

A generator set according to the invention comprises at least one air intake port. This hearing can be arranged at any point of the hood so that the air diffuser is arranged between the hearing and the engine.

Advantageously, a generator according to the invention comprises two air intakes and two air diffusers, each air diffuser being mounted on a side wall of the cover between an air inlet and said engine. .

Advantageously and according to the invention, each inlet air inlet is arranged on a side wall of said hood.

According to an advantageous variant of the invention, the generator comprises two lateral access doors inside the hood, each side door carrying an air diffuser.

This allows access on each side of the group.

According to an advantageous variant of the invention, each air diffuser has at least one side wall covered with a sound insulator. A wall the diffuser coated with a sound isolator and allows to absorb the noise emitted by the alternator.

According to an advantageous variant of the invention, the side doors each carry an air diffuser arranged at the level of the alternator, itself arranged between the control box and the motor.

Advantageously and according to the invention, the control box, the alternator and the motor are arranged along the longitudinal direction, the control box being attached to the alternator.

Such an arrangement has a small footprint.

A diffuser of a generator set according to the invention can be of any type. It may for example comprise air diffusion slots, fins generating turbulence in the vicinity of the outlet of the diffuser, grids, etc.

It can be made of extruded aluminum, PVC or any equivalent material.

According to an advantageous variant of the invention, at least one air diffuser

-in particular each air diffuser- is a linear air diffuser.

According to another particular aspect, the generator may comprise at least one opening directing a portion of the air introduced by at least one of the openings to said alternator.

The invention also relates to a generator characterized in combination by all or part of the characteristics mentioned above or below.

5. List of figures

Other objects, features and advantages of the invention will become apparent on reading the following description given solely by way of nonlimiting example and which refers to the appended figures, in which:

FIG. 1 is a diagrammatic perspective view from above of a generator set according to one embodiment of the invention on which the upper plate is not represented,

FIG. 2 is a diagrammatic perspective view from above of a portion of a generator set according to an embodiment of FIG. the invention,

- Figure 3 is a schematic perspective view of a generator set according to another embodiment.

6. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION In the figures, the scales and the proportions are not strictly adhered to for purposes of illustration and clarity.

Throughout the detailed description which follows with reference to the figures, unless otherwise indicated, each part of the generator set is described as it is arranged when the generator set is placed on a horizontal plane support. This arrangement is shown in particular in FIGS. 1 and 2.

As shown in FIG. 1, a generator set according to the invention comprises a cover 10, or frame, extending along a longitudinal direction, and mounted on an overhanging frame 11. The longitudinal direction is the main direction of the Generator. According to the embodiment of the figures, the generating set has a parallelepipedal general shape and the longitudinal direction is the direction in which this parallelepiped extends, that is to say, the direction substantially parallel to the longitudinal walls of the parallelepiped forming the cover.

The generator also includes a thermal engine 3 mounted on the frame 11. This engine can be of all types. It can be an Otto cycle engine, Diesel cycle, Rankine cycle, Brayton cycle, and generally all types of engines.

A generator set according to the invention also comprises an alternator 2 mounted on the chassis 11 and connected to the thermal engine 3, a control and connection box 1 enabling the generator to be controlled on the one hand and the generator to be supplied on the other. Connectors for connecting electrical devices to the generator.

According to the embodiment of the figures, the cover 10 comprises several doors allowing access to the various elements housed inside the cover 10, including two doors 8, 9 side respectively arranged on each side wall of the cover 10, at the alternator 2. These doors 8, 9 are pivotally mounted on the cover 10 so as to be able to pivot about 180 ° (or slightly more than 180 °), the wall portion carrying the gills not being in the plane defined by the doors 8, 9 when closed) in a closed position in which the door prevents access to the interior of the hood to an open position in which the door allows easy access to the interior of the hood, so that a operator can reach all the organs arranged in the hood to ensure maintenance.

For example, because of the absence of baffles, it is easy to replace a diode bridge mounted at the rear of the control box 1.

According to the embodiment of the figures, the hood 10 also comprises doors 26, 27 respectively arranged on each side wall of the hood and allowing access to the zone of the hood 10 where the engine 3 is housed.

The cover 10 also comprises on each of these walls an inlet 6, 7 of air inlet arranged in the vicinity of a longitudinal end of the cover opposite the thermal motor 3.

Each hearing 6, 7 is formed of a plurality of longitudinal lumens 12 superposed one above the other. According to another embodiment, each ear may have a different shape and constitution without calling into question the general operation of the invention.

According to the embodiment of the figures, an air diffuser 4, 5 is mounted on each door 8, 9 of the generator set (in other embodiments, the air diffuser can be carried, at least in part, on a fixed wall, especially in the case where a single side wall is equipped with a door).

Each diffuser 4, 5 of air can be mounted on the door by all types of means. For example, according to one embodiment, the diffuser is screwed onto the door. According to another variant, the diffuser is stuck on the door. According to yet another variant, it is directly welded to the door.

The air diffuser 4 comprises an air inlet 40 for receiving the air entering the hood 10 through the inlet louver 6 and an air outlet 41 for ejecting air to the engine 3 The air diffuser 4 has a generally parallelepipedal shape and extends along the longitudinal direction, that is to say substantially horizontally, when the door 8 on which is mounted this diffuser, is closed. The transverse wall in which is provided the air inlet 40 is inclined relative to the longitudinal direction so that it is oriented towards the air inlet louver 6 in the hood. On the other hand, the opposite transverse wall in which the air outlet 40 is formed is perpendicular to the longitudinal direction so that the expelled air goes towards the engine 3. This air diffuser is for example a linear diffuser, for example a High induction diffuser with Coanda effect.

The air diffuser 5 mounted on the opposite side wall is preferably identical to the air diffuser 4.

According to the preferred embodiment of the figures, the hood comprises, in connection with each air inlet, an air distribution channel formed between the air intake opening and the corresponding air diffuser.

For example, for the air intake port 7, a channel 17 is formed between this inlet port 7 and the inlet of the air diffuser 5 mounted on the door 9. This channel is formed of a part through the hood side wall on which the hearing 7 is formed and by a vertical baffle 18 mounted in the hood and extending in a substantially longitudinal direction to form an obstacle to the incoming air flow so as to deflect the direction flow to the air inlet of the air diffuser.

An opening 171 (Figure 1) may be provided in the channel 17 and / or in the diffusion, to direct a portion of the air to the alternator.

According to one embodiment of the invention, each diffuser has on one of these side walls, for example the side wall in contact with the door on which it is mounted, a sound insulator.

According to the embodiment of the figures, the alternator 2, the motor 3 and the control box are arranged along the longitudinal direction. In addition, the control unit 1 and connection is attached to the alternator 2. In particular, there is no gap between the control box 1 and the alternator 2.

Figure 3 is a general view of a generator set according to another embodiment of the invention. This figure shows a door 21 arranged at the longitudinal end of the cover 10 in the vicinity of the control housing 1 and connection. This door 21 provides access to power outlets and switches controlling these outlets in which an operator can come to connect electrical devices.

The invention is not limited to the embodiments described. For example, according to a variant of the invention, each air diffuser may further be provided with a fan for accelerating the air flow. That said, the presence of this fan is not necessary to achieve the objectives of the invention.

Claims

1. A generator comprising a cover (10) extending along a longitudinal direction, having at least one inlet (6; 7) of air inlet, and mounted on a frame (1 1) bearing successively in said longitudinal direction:

a thermal motor (3) mounted in the hood (10),

an alternator (2) mounted in the hood (10) and connected to said heat engine (3) so as to transform the energy received from the heat engine (3) into electrical energy,

a control and connection box (1) connected to said alternator, in the vicinity of said air intake port (6; 7), characterized in that it comprises at least one air diffuser (4; 5) mounted on a side wall of said hood (10) and extending substantially in said longitudinal direction, so as to direct the air transversely from said air intake port (6; 7) to said thermal engine (3).

2. Generator according to claim 1, characterized in that said cover (10) comprises at least one door (8; 9) lateral access to the inside of the cover (10) forming a portion of said side wall of said cover (10).

3. Generator according to claim 2, characterized in that at least one door (8; 9) side carries a diffuser (4; 5) of air.

4. Generator according to one of claims 1 to 3, characterized in that it comprises two louvres (6, 7) of air inlet and two diffusers (4, 5) of air, each diffuser (4 , 5) of air being mounted on a side wall of the hood (10) between an inlet (6, 7) of air inlet and said motor (3) thermal.

5. Generator according to claims 2 and 4 taken together, characterized in that it comprises two doors (8, 9) lateral access to the inside of the cover (10), each door (8, 9) side bearing a diffuser (4, 5) of air.

Generator according to one of Claims 1 to 5, characterized in that each inlet (6, 7) of air inlet is arranged on a side wall of said hood (10).

7. Generator according to one of claims 1 to 6, characterized in that each diffuser (4, 5) of air has at least one side wall covered with a sound insulator.

8. Generator according to one of claims 1 to 7, characterized in that said housing (1) for control and connection, said alternator (2) and said motor (3) thermal are arranged along the longitudinal direction, said control and connection box (1) being coupled to said alternator (2).

9. Generator according to one of claims 1 to 8, characterized in that each diffuser (4, 5) of air is a linear air diffuser.

10. Generator according to one of claims 1 to 9, characterized in that it comprises at least one opening (171) directing a portion of the air introduced by at least one of the openings (6; 7) to said alternator (2).