WO2002065619A1

WO2002065619A1 - Engine driven generator

Info

Publication number: WO2002065619A1
Application number: PCT/JP2002/001054
Authority: WO
Inventors: Shinji Hibi
Original assignee: Yanmar Co., Ltd.
Priority date: 2001-02-13
Filing date: 2002-02-07
Publication date: 2002-08-22
Also published as: JP2002238214A

Abstract

An engine generator in which the rotor (13) of a generator (8) is coupled with the crankshaft (14) of an engine (4) and the generator (8) is operated by driving the engine (4). In order to make compact the engine generator, a rotor (13) is disposed on the outer surface of a flywheel (11) and the stator (12) of the generator (8) is secured to the inner circumferential surface of a flywheel housing (9).

Description

Specification

Generator driven by engine

The present invention relates to a generator driven by an engine, the generator being connected to a flywheel of the engine. Background art

2. Description of the Related Art Conventionally, a generator driven by an engine has been known. For example, a generator driven separately from an engine is directly connected to a crankshaft of the engine. In addition, in order to reduce the size of the generator, a recess is formed in the flywheel of the engine, and a rotor magnet and a stay coil are housed in the recess, and a flywheel built-in type in which the generator is built in the flywheel There was a generator.

Furthermore, as shown in Japanese Patent Application Publication (hereinafter referred to as “JP-A”) No. 2000-027913, the tip of the rotor shaft of the generator is fitted and connected to the crankshaft of the engine. However, there is also known a device in which a generator is operated by driving an engine, in which a fan is fitted to the end of the shaft, and the end of the rotor shaft is rotatably supported on a rear housing of the generator via a bearing. Have been.

However, as described above, in a generator that is directly connected to the crankshaft of the engine, the entire length of the generator including the engine was large in front-to-back length and heavy.

In addition, when the flywheel is configured with a built-in generator, the power generation capacity is usually as low as about 100 W because the storage space for the magnet and the coil is small. Such generators were used only for charging a single battery. Therefore, when the generator was used for applications requiring a large amount of power, such as those for floodlights and welding machines, large generators directly connected to the engine had to be used.

In the technique disclosed in Japanese Patent Application Laid-Open No. 2000-2798913, the overall length of the generator is increased and the rotor (rotor) of the generator is supported. It is necessary to support both ends of the evening. Disclosure of the invention

The problems in the prior art are as described above. In the present invention, first, a rotor provided on an outer surface of a flywheel rotating around a crankshaft as an axis, and provided on an inner peripheral surface of a housing of the flywheel. And the stator is opposed to the rotor.

An electromagnet provided on the outer surface of the flywheel rotating around the crankshaft, and an armature provided on the inner peripheral surface of the flywheel, wherein the armature faces the electromagnet.

In addition, the permanent magnet is provided on an outer surface of a flywheel rotating around a crankshaft, and an armature is provided on an inner peripheral surface of a housing of the flywheel. . An armature provided on an outer surface of a flywheel rotating around a crankshaft, and a permanent magnet provided on an inner peripheral surface of a housing of the flywheel, wherein the permanent magnet faces the armature. Things.

Further, the armature is provided on an outer surface of a flywheel rotating around a crankshaft as an axis, and an electromagnet is provided on an inner peripheral surface of a housing of the flywheel, and the electromagnet is opposed to the armature. .

By configuring the generator driven by the engine as described above, the generator can be housed in the flywheel housing, so that the configuration can be made compact.

In addition, since the crankshaft also serves as the generator shaft, members can be omitted, and the generator can be made lighter and more compact. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a perspective view showing the overall configuration of the co-generator, Fig. 2 is a side view showing the engine with the generator installed, Fig. 3 is a schematic diagram showing the configuration of the engine and the generator, and Fig. 4 is the configuration of the generator section FIG. 5 is a side sectional view showing a second embodiment of the generator portion, FIG. 6 is a schematic diagram showing a third embodiment of the generator configuration, FIG. 7 is a front sectional view showing a third embodiment of the generator configuration. BEST MODE FOR CARRYING OUT THE INVENTION

First, an example in which the generator of the present invention is applied to a package-type co-generator will be described with reference to FIG. A cooling vent 2 is provided at the upper part of the casing 1 of the co-generator, and an engine 4 is provided below the casing 1. ·

The casing 1 is divided into an upper part and a lower part by a partition wall 3, and the cooling device arranged at the upper part of the casing 1 is not affected by the heat of the engine 4. The partition 3 is provided with an opening through which the cooling air passes, and the air in the housing 1 is guided to the upper portion of the housing 1 through the opening to improve the cooling efficiency in the housing 1. It has become possible.

The co-generator drives the engine 4 to generate electric power, and stores hot water for hot water supply in a hot-water storage tank or the like using heat generated by driving the engine 4. The hot water storage tank can be arranged in the co-generator housing 1 over the upper or lower part or the upper and lower parts. Further, it is possible to arrange the hot water storage tank outside the housing 1.

A cylinder head 7 is mounted on the upper part of the engine 4, and a warhead jacket is mounted on the cylinder head 7. A cooling water pipe is connected to the water jacket to supply cooling water to the cylinder head 7 and to collect the cooling water having absorbed engine exhaust heat in the cylinder head 7. Thus, the engine 4 is cooled.

A cylinder block 5 is connected to a lower portion of the cylinder head 7, and a water jacket that allows cooling water to pass through the cylinder opening 5 is also configured. The exhaust heat of the engine 4 is recovered in the cylinder head 7 and the cylinder block 5, and the exhaust heat contained in the exhaust of the engine 4 is recovered via a heat exchanger (not shown).

The oil pan 6 is connected to the lower part of the cylinder block 5 and the oil pan 6 In 6, the lubricating oil of the engine 4 is retained.

A generator 8 is disposed on the rear side of the engine 4, and generates electric power by the driving force of the engine 4.

An ignition magnet and an ignition coil can be arranged on the front of the engine 4. In this case, the space used for the generator on the rear surface of the engine 4 can be increased, so that the size of the generator 8 can be easily increased, and the configuration of the generator 8 can be simplified. Further, the wiring of the generator 8 can be simplified. Further, it is possible to arrange the star of the engine 4 in front of the engine 4 and use the rear surface of the engine 4 as the space occupied by the generator 8. Thereby, the layout of the engine 4 can be simplified, and the maintenance of the engine 4 and the generator 8 can be easily performed.

As shown in FIG. 3, the crankshaft 14 communicates with the lower portion of the cylinder block and the flywheel housing 9 so that the output of the engine 4 is directly supplied to the generator 8.

A flywheel housing 9 is formed on the rear surface of the engine 4, and a generator 8 is disposed in the flywheel housing 9. A piston rod is connected to the crankshaft 14 of the engine 4, and the vertical movement of the biston is output as a rotational movement by the crankshaft.

The crankshaft 14 is rotatably supported at both ends at the lower portion of a cylinder block 5 of the engine 4 via bearings 15 and 16.

The inside of the flywheel eight housing 9 is formed outside the cylinder block 5 and the oil pan 6 so that the lubricating oil in the engine 4 does not enter the flywheel housing 9.

The flywheel 11 is connected to one end of the crankshaft 14 outside the bearing 15, and is configured to rotate together with the crankshaft 14. The rotor (rotor) 13 of the generator 8 is fixed to the crankshaft 14 via the flywheel 11.

Around the rotor 13, the stator (stator) 1 2 of the generator 8 is provided. The stays 12 are fixed to the flywheel housing 9.

In the above configuration, the bearing of the crankshaft 14 (by the bearing 15) is performed near the flywheel 11 and the rotor 13 of the generator 8 is cantilevered with the flywheel 11 in a cantilever manner. It can be supported. Since the flywheel 11 is disposed near the bearing 15, the distance between the flywheel 11 and the bearing 15 can be shortened, and the load applied to the bearing 15 can be reduced.

The load applied to the bearing 15 can be reduced, and the durability of the generator 8 and the engine 4 can be improved.

Further, since the rotor 13 of the generator 8 is fixed to the flywheel 11, the length can be reduced in the direction of the crankshaft 14 including the flywheel 11 and the mouth 13. In addition, since the rotor shaft of the generator was eliminated, bearings for the rotor shaft could be omitted.

Next, the configuration of the generator 8 will be described in detail with reference to FIG.

The flywheel housing 9 is attached to the engine 4 via a mounting flange 20 of the engine 4.

The rear portion of the flywheel housing 9 is open, and a cover 19 is attached to the opening of the flywheel housing 9. By removing the cover 19, the generator 8 and the flywheel 11 can be removed.

Further, the cover 19 is provided with a ventilation port, and the ventilation inside the flywheel housing 9 is performed from the ventilation port to cool the generator 8.

The tip of the crankshaft 14 is fitted into a mounting recess formed in the center of the flywheel 11 and is fixed to the flywheel 11 by screws or the like.

On the inner peripheral surface of the flywheel housing 9, a multi-pole stay coil 12 (armature) is fixed via a coil plate 18. Row 13 is composed of permanent magnets and is located at the center of the flywheel 11. The flywheel 11 is fitted into the mounting recess formed and is fixed to the end of the flywheel 11 with a screw or the like. In this way, the rotor 13 is disposed to face the stay coil 12, and the rotor 13 rotates together with the crank shaft 14 in a state surrounded by the stay coil 12 to generate power. is there.

On the inner peripheral surface of the flywheel housing 9, the coil plate 18 arrangement portion is formed in a convex shape inward, and the coil plate 18 is held on the inner peripheral surface of the thick flywheel housing 9. It performs

By configuring as described above, the overall length of the engine generator (including the engine 4 and the generator 8) (in the direction of the crankshaft 14) can be reduced, and a part of the members constituting the generator 8 are shared with the engine 4. Therefore, the engine generator can be made compact and lightweight.

Further, the generator 8 has its mouth 13 fixed to one end of the crankshaft 14 and supports the crankshaft 14 from one side of the generator 8, so as described above, One of the flywheel housings 9 can have an open structure, and can be easily accessed by removing the cover 19, thereby improving maintainability.

Also, as shown in FIG. 5, it is possible to attach a mouth 13 to the end of the flywheel 11 via a piece 17. The piece 17 is shaped to fit with the surface of the rotor 13 on the engine side. As a result, the weight of the mouth 13 can be reduced. In addition, since the piece 17 only needs to be able to adjust the axial position of the rotor 13 so that the rotor 13 and the coil plate 18 face each other, an inexpensive and lightweight material may be used.

Also in the configuration shown in FIG. 5, the tip of the crankshaft 14 is inserted into a mounting recess formed in the center of the flywheel 11, and is fixed to the crankshaft 14 by screws or the like. The piece 17 is inserted into a mounting recess formed in the center of the flywheel 11, and is fixed to an end of the flywheel 11 with a screw or the like. The rotor 13 is fitted into a mounting recess formed at the center of the piece 17, fixed to an end of the piece 17 with a screw or the like, and is configured to be integrally rotatable with the crankshaft 14. I have. Next, another configuration of the generator will be described with reference to FIGS. In the configuration of the generator 8 shown in FIGS. 6 and 7, the rotor 13 is fixed to the outer peripheral surface of the flywheel 11, and the stator 12 is arranged around the flywheel 11. ing. The stay 12 is provided on the inner peripheral surface of the flywheel housing 9 and faces the mouth 13. As described above, the generator 8 of the present embodiment is configured by covering the flywheel 11 provided with the mouth 13 with the flywheel housing 9 provided with the stay 12. Yes, the flywheel 11, rotor 13, and stay coil 12 are arranged on the same circle centered on the crankshaft 14, so the generator 8 in the extension direction of the crankshaft 14 is The length can be made shorter. Thereby, the generator 8 can be configured to be compact.

In the configuration of the generator 8 described above, a permanent magnet / electromagnet can be used as the rotor 13. When using an electromagnet, the power generated in the generator 8 can be supplied to the electromagnet directly or via a battery or the like. When using permanent magnets, a simple configuration can be used. When an electromagnet is used, the line density of magnetic force generated from the rotor 13 can be easily adjusted. Industrial applicability

The present invention is a compact engine generator using a flywheel of an engine to construct a generator. In addition to the co-generator shown in Fig. 1, it is also capable of continuously supplying power even during a power outage. It is applied to various devices using an engine generator, such as a self-generation system for power generation.

Claims

The scope of the claims

1. A rotor provided on the outer surface of a flywheel rotating around a crankshaft, and a stator provided on an inner peripheral surface of a housing of the flywheel, wherein the stator faces the rotor. A generator driven by an engine.

2. An electromagnet provided on an outer surface of a flywheel rotating around a crankshaft, and an armature provided on an inner peripheral surface of the flywheel, wherein the armature faces the electromagnet. Generator driven by a rotating engine.

3. Consisting of a permanent magnet provided on the outer surface of a flywheel rotating around a crankshaft and an armature provided on an inner peripheral surface of a housing of the flywheel, wherein the armature faces the permanent magnet. A generator driven by an engine.

4. An armature provided on the outer surface of the flywheel rotating around the crankshaft, and a permanent magnet provided on the inner peripheral surface of the housing of the flywheel, wherein the permanent magnet faces the armature. A generator driven by an engine.

5. An armature provided on the outer surface of the flywheel rotating around the crankshaft, and an electromagnet provided on the inner peripheral surface of the housing of the flywheel, wherein the electromagnet faces the armature. A generator driven by the engine.