JP2541575Y2 - Air-cooled engine generator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled engine generator for discharging engine cooling air and generator cooling air in the same direction.

[0002]

2. Description of the Related Art An air-cooled engine generator 101 shown in FIG.
Is an air-cooled engine 102 and this engine body 103
, An air-cooled generator 106 connected to a crankshaft protruding from the other end of the engine main body 103, and an engine cooling fan 104 disposed between the engine main body 103 and the generator 106. A generator cooling fan 105, a frame 115 covering the engine 102 and the generator 106, and a sound insulating wall 107 attached to the frame 115 and covering the generator 106.

The engine cooling fan 104 has a cover 1
08, a cooling air inlet 109 is provided below the cover 108, and an opening 108 a facing the cylinder portion 103 a of the engine body 103 is provided above the cover 108. As a result, when the engine cooling fan 104 rotates, the engine cooling air flows from one end of the engine main body 103 to the other end through the cylinder portion 103a as indicated by an arrow A in the drawing. Radiation fins are provided on the cylinder portion 103a.

[0004] A cooling air inlet 110 is provided at an end face of a casing 106a of the generator 106, and a cooling air inlet 111 is also provided at an end 107d of a sound insulating wall 107 facing the end face of the casing 106a of the generator 106. Is provided. The space between the two cooling air inlets 110 and 111 is covered by a cooling air guide duct 112. The duct 112 is attached to the generator 106 by bolts 117. Thereby, the generator cooling fan 105
Rotates, the generator cooling air flows from the generator 106 toward the other end of the engine body 103 as shown by the arrow B in the figure. The generator cooling air reaching the other end of the engine body is discharged to the outside of the generator 106 through an opening 106b provided on the outer periphery of a casing 106a of the generator 106. In addition, the sealing member 10 is provided on the end sound insulating wall 107d.
7d is integrated to prevent hot air from entering the duct 112. The end sound insulating wall 107d is attached to the frame 115 by bolts and nuts 118.

Discharging the engine cooling air or the generator cooling air as described above toward the operator gives an uncomfortable feeling to the operator, and discharging the cooling air toward the generator control panel causes a malfunction. Therefore, the cooling air discharge guide 11 for guiding and discharging the engine cooling air and the generator cooling air reaching the other end of the engine body 103 in the same direction.
3 is arranged on the other end side of the engine body 103.
Through the opening 113a of the cooling air discharge guide 113, the engine cooling air and the generator cooling air are
1 is discharged outside.

[0006]

The conventional cooling air discharge guide 113 combines the engine cooling air reaching the other end of the engine body 103 with the generator cooling air and discharges the same through the same opening 113a. . Therefore, when the engine cooling air and the generator cooling air merge, they interfere with each other, causing a problem that the cooling air discharge efficiency is reduced and the cooling efficiency of the engine 102 and the generator 106 is reduced.

Another problem is that the wind noise of the engine cooling air and the generator cooling air is emitted from the engine generator 101 as noise.

An object of the present invention is to provide an air-cooled engine generator capable of solving the above-mentioned problems of the prior art.

[0009]

The present invention is characterized by an air-cooled engine, an engine cooling fan disposed at one end of the engine body, and an air-cooled fan disposed at the other end of the engine body. A power generator, a generator cooling fan disposed between the engine body and the generator, a sound insulating wall covering the generator, and a cooling air discharge guide disposed on the other end side of the engine body. In the air-cooled engine generator in which the engine cooling air and the generator cooling air reaching the other end of the engine body are guided in the same direction by the cooling air discharge guide, the cooling air discharge guide includes: The point is that a partition member for preventing the flow and the flow of the generator cooling air from interfering with each other is provided. It is preferable that the partition member be provided with a sound absorbing material.

[0010]

According to the structure of the present invention, the engine cooling air and the generator cooling air reaching the other end of the engine body are guided in the same direction by the cooling air discharge guide. At this time, since a partition member is provided in the cooling air discharge guide,
The flows of the engine cooling air and the generator cooling air do not interfere with each other. The vibration of the engine cooling air and the generator cooling air is reduced by the sound absorbing material provided in the partition member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

Air-cooled engine generator 1 shown in FIGS.
Is an air-cooled engine 2, an engine cooling fan 3 arranged at one end of the engine body 2a, an air-cooled generator 5 connected to a crankshaft protruding from the other end of the engine body 2a, A generator cooling fan 4 is provided between the engine body 2a and the generator 5.

The engine 2 and the generator 5 are connected to a frame 1
The sound insulation wall 14 is attached to the frame 10 and is surrounded by the sound insulation wall 14. The sound insulating wall 14 is composed of an upper sound insulating wall 14a covering the upper part of the generator 5, a lower sound insulating wall 14b covering the lower part, a side sound insulating wall 14c covering both sides, and an end sound insulating wall 14d facing the end face. The end sound insulating wall 14d is formed by the bolts and nuts 18 in the frame 1.
It is attached to 0. In addition, the upper part of the engine 2
The engine 2 protrudes above the upper sound insulation wall 14a.
1, no sound insulation wall is attached to the right side.

The engine cooling fan 4 is connected to the crankshaft of the engine 2 and is covered by a cover 11. A cooling air inlet 11a is provided at a lower portion of the cover 11, and an opening 11b facing the cylinder portion 2a 'of the engine body 2a is provided at an upper portion of the cover 11. As a result, when the engine cooling fan 3 rotates, the engine cooling air flows from one end of the engine main body 2a to the other end through the cylinder portion 2a 'as shown by an arrow A in the drawing. A radiation fin is provided on the cylinder portion 2a '.

The generator 5 has a cylindrical casing 5a.
And the engine 2
And a stator 5c fixed to a casing of the rotor 5b. A cooling air inlet 7 is provided at an end face of the casing 5a.
Further, a cooling air inlet 15 is provided in the end sound insulation wall 14b facing the end surface of the casing 5a. The space between the two cooling air inlets 7 and 15 is covered by a cooling air guide duct 16.

The generator cooling fan 4 is connected to the crankshaft of the engine 2 and has a casing 5 a of the generator 5.
Covered in. A plurality of openings 6 located outside the generator cooling fan 4 are provided on the outer periphery of the casing 5 a of the generator 5.

The tubular cooling air guide duct 16 is integrated with the end sound insulating wall 14d by welding. The end of the generator 5 is inserted into the guide duct 16, and an annular seal member 17 having elasticity is interposed between the inner periphery of the guide duct 16 and the outer periphery of the generator 5.

As a result, when the generator cooling fan 4 rotates, the generator cooling air is generated as shown by the arrow B in the figure.
Flows toward the other end of the engine body 2a. The generator cooling air reaching the other end of the engine body 2a is:
The electric power is discharged to the outside of the generator 5 from an opening 6 provided on the outer periphery of a casing 5 a of the generator 5.

A cooling air discharge guide 25 is arranged at the other end of the engine body 2a. The cooling air discharge guide 25 is fixed to the engine main body 2a by an appropriate means, and moves the engine cooling air and the generator cooling air reaching the other end of the engine main body 2a in the same direction (arrow C in FIG. 2).
Direction).

As shown in FIG. 4, the cooling air discharge guide 25 faces the engine main body 2a and the generator 5
Wall 25b in which an opening 25a into which is inserted is formed
From the outer peripheral edge of the first wall 25b.
and a second wall 25c extending toward “a”. The upper part 25c 'of the second wall 25c is
c ", and on the upper part 25c 'of the second wall 25c,
An opening 26a for discharging engine cooling air and an opening 26b for discharging generator cooling air are provided. The engine cooling air discharge opening 26a is located above the generator cooling air discharge opening 26b. The engine cooling air flows through the cylinder portion 2a 'of the engine body 2a and reaches the other end of the engine body 2a, and the generator cooling air flows through the inside of the casing 5a of the generator 5 below the cylinder portion 2a'. This is because it reaches the other end of 2a.
The two discharge openings 26a, 26b pass through the duct 27 as shown by phantom lines in FIG.
The cooling air is discharged from the cooling air discharge port 28 provided at the position c.

A plate-like partition member 30 is provided inside the cooling air discharge guide 25 between the upper and lower sides of the discharge openings 26a and 26b. The partition member 30
The flow of the engine cooling air reaching the other end of the engine body 2a and the flow of the generator cooling air are prevented from interfering with each other. Sound absorbing materials 31a and 31b such as urethane are attached to the upper and lower surfaces of the partition member 30.

According to the above configuration, the engine cooling air and the generator cooling air reaching the other end of the engine body 2a are guided in the same direction by the cooling air discharge guide 25. At this time, since the partition member 30 is provided in the cooling air discharge guide 25, the flow of the engine cooling air and the flow of the generator cooling air do not interfere with each other, and the efficiency of discharging each cooling air is improved, and And the cooling effect of the generator is improved. A sound absorbing material 31a provided on the partition member 30;
The vibration of the engine cooling air and the generator cooling air is absorbed by 31b, so that noise can be reduced.

Further, the end sound insulating wall 14d is connected to the bolt and nut 1
8, the operation of attaching to the frame 10 and the operation of inserting the generator 5 into the cooling air guide duct 16 via the sealing member 17 can be performed at the same time, and the efficiency of the assembling operation can be improved. Further, since the end sound insulating wall 14d and the cooling air guide duct 16 are integrated, the number of parts is reduced. Further, since the seal member 17 has elasticity, a large vibration when the engine 2 starts and stops can be absorbed, and the seal member 17 is not damaged.

[0024]

According to the air-cooled engine generator of the present invention, the cooling air discharge guide is provided with a partition member to prevent the engine cooling air and the generator cooling air from interfering with each other. The exhaust efficiency can be improved, and the cooling effect of the engine and the generator can be improved. Also, by providing the partition member with a sound absorbing material, noise due to engine cooling air and generator cooling air can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air-cooled engine generator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view of the air-cooled engine generator according to the embodiment of the present invention;

FIG. 4 is a perspective view of a cooling air discharge guide according to the embodiment of the present invention;

FIG. 5 is a sectional view of a conventional air-cooled engine generator.

[Explanation of symbols]

 2 Air-cooled engine 3 Engine cooling fan 4 Generator cooling fan 5 Generator 14a, 14b, 14c, 14d Sound insulation wall 25 Cooling air discharge guide 30 Partition member 31a, 31b Sound absorbing material

Claims (2)

(57) [Scope of request for utility model registration] 1. An air-cooled engine, an engine cooling fan disposed at one end of the engine main body, an air-cooled generator disposed at the other end of the engine main body, and an air-cooled generator disposed between the engine main body and the generator. A generator cooling fan disposed therebetween, a sound insulation wall covering the generator, and a cooling air discharge guide disposed at the other end of the engine main body. In the air-cooled engine generator in which the engine cooling air and the generator cooling air are guided in the same direction, the flow of the engine cooling air and the flow of the generator cooling air interfere with each other in the cooling air discharge guide. An air-cooled engine generator, further comprising a partition member for preventing the occurrence of an air-cooled engine. 2. The air-cooled engine according to claim 1, wherein a sound absorbing material is provided on a partition member for preventing the flow of the engine cooling air and the flow of the generator cooling air from interfering with each other. Generator.