JPH0566222U - Air-cooled engine generator - Google Patents

Abstract

(57) [Summary] [Constitution] An engine cooling fan 3 arranged at one end of a main body 2a of an air-cooled engine 2 and an air-cooled generator 5 arranged at the other end, an engine main body 2a and a generator 5 thereof. And a sound insulation wall 14a, 14b, 14c, 14d for covering the generator 5, and a cooling air exhaust guide 25 arranged on the other end side of the engine body 2a. .. The cooling air discharge guide 25 guides the engine cooling air and the generator cooling air in the same direction. The cooling air exhaust guide 25 is provided with a partition member 30 that prevents the engine cooling air flow and the generator cooling air flow from interfering with each other. [Effect] The cooling efficiency of the engine and the generator is improved by improving the discharge efficiency of the engine cooling air and the generator cooling air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air-cooled engine generator that discharges engine cooling air and generator cooling air in the same direction.

[0002]

[Prior Art]

 The air-cooled engine generator 101 shown in FIG. 5 includes an air-cooled engine 102, an engine cooling fan 104 arranged at one end of the engine body 103, and a crankshaft protruding from the other end of the engine body 103. An air-cooled generator 106, a generator cooling fan 105 arranged between the engine body 103 and the generator 106, a frame 115 covering the engine 102 and the generator 106, and And a sound insulation wall 107 that is attached to the frame 115 and covers the generator 106.

The engine cooling fan 104 is covered with a cover 108, a cooling air introducing port 109 is provided in a lower portion of the cover 108, and an opening 108 a facing the cylinder portion 103 a of the engine body 103 is provided in an upper portion of the cover 108. Is provided. As a result, when the engine cooling fan 104 rotates, engine cooling air flows from one end side of the engine body 103 through the cylinder portion 103a toward the other end side as indicated by arrow A in the figure. Radiating fins are provided on the cylinder portion 103a.

A cooling air introduction port 110 is provided on the end surface of the casing 106 a of the generator 106, and a cooling air introduction port is also provided on the end portion 107 d of the sound insulation wall 107 facing the end surface of the casing 106 a of the generator 106. 111 is provided. A space between the cooling air inlets 110 and 111 is covered by a cooling air guide duct 112. The duct 112 is attached to the generator 106 with bolts 117. As a result, when 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 indicated by 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 the casing 106a of the generator 106. A seal member 107d is integrated with the end sound insulation wall 107d to prevent hot air from entering the duct 112. The end sound insulation wall 107d is attached to the frame 115 by a bolt nut 118.

When the engine cooling air or the generator cooling air as described above is discharged toward the operator, it gives an operator discomfort, and when discharged toward the generator control panel, it causes a malfunction. Therefore, a cooling air discharge guide 113 for guiding and discharging the engine cooling air and the generator cooling air reaching the other end side of the engine body 103 in the same direction is arranged at the other end side of the engine body 103. ing. The engine cooling air and the generator cooling air are discharged to the outside of the engine generator 101 through the opening 113a of the cooling air discharge guide 113.

[0006]

[Problems to be solved by the device]

 The conventional cooling air discharge guide 113 joins the engine cooling air reaching the other end side of the engine body 103 and the generator cooling air and discharges them from the same opening 113a. Therefore, there is a problem that the engine cooling air and the generator cooling air interfere with each other when they join each other, the discharge efficiency of the cooling air decreases, and the cooling efficiency of the engine 102 and the generator 106 decreases.

There is also a problem that the wind noises of the engine cooling air and the generator cooling air are emitted as noise from the engine generator 101.

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

[0009]

The features of the present invention are that an air-cooled engine, an engine cooling fan arranged at one end of the engine body, and an air cooling fan arranged at the other end of the engine body. A cold generator, a generator cooling fan arranged between the engine body and the generator, a sound insulation wall covering the generator, and a cooling air discharge guide arranged on the other end side of the engine body. An air-cooled engine generator in which the cooling air discharge guide guides the engine cooling air reaching the other end of the engine body and the generator cooling air in the same direction. The point is that a partition member is provided to prevent the cooling air flow and the generator cooling air flow from interfering with each other. It is preferable that the partition member is provided with a sound absorbing material.

[0010]

[Action]

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

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

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

The engine 2 and the generator 5 are surrounded by a frame 10, and a sound insulating wall 14 that covers the generator 5 is attached to the frame 10. The sound insulation wall 14 is composed of an upper sound insulation wall 14a that covers the upper side of the generator 5, a lower sound insulation wall 14b that covers the lower side, side sound insulation walls 14c that cover both sides, and end sound insulation walls 14d that face the end surfaces. The end sound insulation wall 14d is attached to the frame 10 by bolts and nuts 18. The upper portion of the engine 2 protrudes above the upper sound insulating wall 14a, and the sound insulating wall is not attached to the right side of the engine 2 in FIG.

The engine cooling fan 4 is connected to the crank shaft of the engine 2 and is covered with a cover 11. A cooling air introduction port 11a is provided in the lower part of the cover 11, and an opening 11b facing the cylinder part 2a 'of the engine body 2a is provided in the upper part of the cover 11. As a result, when the engine cooling fan 3 rotates, engine cooling air flows from one end side of the engine body 2a through the cylinder portion 2a 'toward the other end side as indicated by an arrow A in the figure. A heat radiation fin is provided on the cylinder portion 2a '.

The generator 5 has a tubular casing 5a, a rotor 5b built in the casing 5a and connected to the crankshaft of the engine 2, and a stator 5c fixed to the casing. A cooling air inlet 7 is provided on the end surface of the casing 5a. Further, a cooling air introduction port 15 is provided in the end sound insulation wall 14b facing the end surface of the casing 5a. A space between the cooling air inlets 7 and 15 is covered with a cooling air guide duct 16.

The generator cooling fan 4 is connected to the crank shaft of the engine 2 and is covered by the casing 5 a of the generator 5. On the outer periphery of the casing 5a of the generator 5, a plurality of openings 6 located outside the generator cooling fan 4 are provided.

The tubular cooling air guide duct 16 is integrated with the end sound insulation wall 14d by welding. The end of the generator 5 is inserted into the guide duct 16, and an elastic annular seal member 17 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 flows from the generator 5 toward the other end side of the engine body 2a as indicated by an arrow B in the figure. The generator cooling air reaching the other end of the engine body 2a is discharged to the outside of the generator 5 through an opening 6 provided on the outer periphery of the casing 5a of the generator 5.

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

As shown in FIG. 4, the cooling air discharge guide 25 has a first wall 25b facing the engine body 2a and formed with an opening 25a into which the generator 5 is inserted, and the first wall 25b. And a second wall 25c extending from the outer peripheral edge toward the engine body 2a. The upper portion 25c 'of the second wall 25c is longer than the lower portion 25c ", and the upper portion 25c' of the second wall 25c is provided with an opening 26a for discharging engine cooling air and an opening 26b for discharging generator cooling air. 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. 2a, the generator cooling air flows inside the casing 5a of the generator 5 below the cylinder portion 2a 'and reaches the other end of the engine body 2a. 26b is discharged from a cooling air discharge port 28 provided in the side sound insulation wall 14c through a duct 27 as shown by a phantom line in FIG.

A plate-shaped 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 prevents the engine cooling air flow and the generator cooling air flow reaching the other end of the engine body 2a 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 side 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 on the cooling air discharge guide 25, the engine cooling air flow and the generator cooling air flow do not interfere with each other, and the discharge efficiency of each cooling air is improved. The cooling effect of the engine and generator is improved. Vibrations of the engine cooling air and the generator cooling air are absorbed by the sound absorbing materials 31a and 31b provided in the partition member 30 to reduce noise.

Further, the work of attaching the end sound insulation wall 14 d to the frame 10 with the bolt nuts 18 and the work of inserting the generator 5 into the cooling air guide duct 16 via the seal member 17 can be performed at the same time, and the assembly work can be performed. The efficiency of can be improved. Further, since the end sound insulation 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, it is possible to absorb a large vibration when the engine 2 starts and stops, and the seal member 17 is not damaged.

[0024]

[Effect of the device]

 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, thereby improving the discharge efficiency of the cooling air. The cooling effect of the engine and generator can be improved. Further, 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 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 an air-cooled engine generator according to an embodiment of the present invention.

FIG. 4 is a perspective view of a cooling air discharge guide according to an 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 members 31a, 31b Sound absorbing material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F02B 77/13 M 8614-3G

Claims (2)

[Scope of utility model registration request] 1. An air-cooled engine, an engine cooling fan arranged at one end of the engine body, an air-cooled generator arranged at the other end of the engine body, and the engine body and the generator. A generator cooling fan arranged between them, a sound insulation wall that covers the generator, and a cooling air discharge guide arranged at the other end side of the engine body, and the cooling air discharge guide allows 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 which have reached the above are guided in the same direction, the engine cooling air flow and the generator cooling air flow interfere with each other in the cooling air discharge guide. An air-cooled engine generator, which is provided with a partitioning member for preventing the above. 2. The air-cooled engine according to claim 1, wherein a sound absorbing material is provided on the partition member that prevents the flow of the engine cooling air and the flow of the generator cooling air from interfering with each other. Generator.