JPH02155447A - Cooler for forcibly air-cooled vertical shaft type engine generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a technology for improving the cooling performance of the internal space of a forced air-cooled vertical shaft engine generator in a cooling device for the generator.

(Prior Art) Some cooling devices for forced air-cooled vertical shaft engine generators have the following basic structure.

For example, as shown in FIG. 1, a working vertical shaft generator 2 and a cooling fan 3 are arranged in this order above an air-cooled vertical shaft engine 1, and the rotor 5 of the generator 2 is connected to the output shaft 4 of the engine. 5a and the cooling fan 3 are connected in sequence, the outer periphery of the generator 2 is covered with a wind guide case 6, and the cooling air is directed from bottom to top by the suction force of the cooling fan 3 to the cylinder 7 and cylinder of the engine 1. After blowing through the rad 8, it is configured to blow through the outer circumferential space 13 and the inner space 14 of the stake 9 of the generator 2.

In this basic structure, as a structure for cooling the internal space 14 of the generator 2, conventionally
The present applicant previously proposed what is shown in Publication No. 4.

This allows cooling air to pass through the internal space of the generator only by the suction force of the cooling fan.

(f1 problem that the invention attempts to solve) The above conventional example has the following problems.

In the internal space of the generator, the rotor rotates at high speed, so there is a large ventilation resistance.On the other hand, the opening of the cooling air inlet and outlet of the generator's internal space due to the suction force of 7 am The differential pressure between the two generators is small, and therefore the amount of cooling air in the internal space of the generator is small, resulting in poor cooling performance and high rotor and stator temperatures during generator operation. As a result, the insulating material of the rotor and stator coils must be made of a high-grade and expensive insulating tank, which increases the manufacturing cost of the generator.

An object of the present invention is to improve the cooling performance of the internal space of a generator.

(Means for Solving the Problems) The present invention, as shown in FIGS. 1 and 2, for example, is characterized by combining the following improved structure in the above-mentioned basic structure.

That is, the rotor 1 of the ignition power generation device fi24 of the engine 1
0 is disposed between the engine 1 and the generator 2, and is interlocked and connected to the output shaft 4 of the engine 1, and a cooling air passage 11 is formed in the rotor 10 of the ignition power generation device 24. A trickle stream 7 amp 12 is fixed to the rotor 10 so as to face the internal space 14 of the working generator 2 from below.

(Function) The present invention works as follows, thereby increasing the cooling performance of the internal space of the generator.

In the internal space of the generator, in addition to the suction air force generated by the cooling fan of the basic structure described above, the pressured air force generated by the trickle flow 7 am of the improved structure described above acts, resulting in a significant increase in the amount of cooling air and improved cooling performance. becomes significantly higher.

As a result, the temperatures of the rotor and stator during operation of the generator are considerably lower than in the above-mentioned conventional example.

(Effects of the Invention) Since the present invention is configured and operates as described above,
It has the following effects.

B. The cooling performance of the internal space of the generator is increased by the additional pumping force provided by the axial fan, and the temperature of the rotor and stator during operation of the generator is considerably lowered.

Thereby, it is possible to use an inexpensive insulating material with a low grade insulation tank as the insulating material for the rotor and stator, and the manufacturing cost of the generator can be reduced.

Since the axial fan that achieves the above effect (A) is installed in the cooling air passage of the rotor of the ignition generator, the overall height of the engine generator can be lowered compared to the case where it is placed above the rotor.

C. The trickle 7 ang can be formed integrally with the rotor,
In this case, the total manufacturing cost and assembly cost of the axial fan and rotor can be reduced.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a longitudinal sectional front view showing one embodiment of the present invention.

This forced air-cooled vertical shaft engine generator cooling device has a working vertical shaft power generator R2 and a centrifugal cooling fan 3 disposed in this order above the air-cooled vertical shaft engine 1 within an exterior soundproof cover 22.

The crank 1I4 of the engine 1 has its upper end protruding onto the earthen wall of the crankcase 15, thereby serving as an output shaft.

The lower end of the rotor shaft 5a of the rotor 5 of the generator 2 is directly connected and fixed to the protruding upper end of the output shaft 4 of the engine, and the suction type cooling fan 3 is fixed to the upper end of the rotor shaft 5a. be.

The cylinder head 8 and cylinder head 7 of the engine are covered with a wind guide cover 23, and the outer periphery of the generator 2 part is covered with a wind guide case 6.
covered with. The suction force of the cooling fan 3 blows cooling air from bottom to top through the cylinder 7 and cylinder head 8 of the engine 1, and then in parallel to the outer circumferential space 13 and internal space 14 of the stator 9 of the generator 2. It is constructed to be blown through.

A rotor 10 of a generator 24 for ignition of the engine is disposed between the engine 1 and the generator 2, and the rotor 10 is externally fitted and fixed to the rotor pongee 5a of the generator 2 to connect the output shaft of the engine. 4 is interlocked and connected.

As shown in FIG. 2, the rotor 10 has a magnet 18 and a balancer weight 19 buried in symmetrical positions with the output shaft 4 as the center.
Two cooling air passages 11 are formed vertically penetrating in a direction perpendicular to the ending line. Each cooling air passage 11 is formed integrally with the rotor 10 so that an axial flow 7 12 faces the internal space 14 of the generator 2 from below.

In addition, on the side of the rotor 10, there is an ignition power generation device i2.
4 coils 17 are arranged, the outer periphery of this coil 17 is covered with an air guide 21 connected to the air guide case 6, and a cooling air port 25 is opened below the coil 17. By sucking the cooling air from this cooling air population 25, the coil 17 is cooled and the temperature is lowered by approximately 10°C, and the amount of suction cooling air in the air guiding case 6 is increased to increase the cooling capacity of the stator 9 of the generator. Increase.

In the figure, numeral 26 is a ventilation inlet, 27 is a ventilation outlet, 28 is a refill starter, and 29 is a fuel tank.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of the entire cooling device for a forced air-cooled vertical shaft type engine generator, and FIG. 2 is a plan view of the rotor of the ignition generator. It is. 1... Air-cooled vertical pongee type engine, 2... Vertical shaft type generator for work, 3... Cooling fan, 4... Engine output shaft, 5... Rotor, 5a... Generator Rotor pongee, 6... Air guide case, 7... Cylinder, End... Cylinder head, 9... Stator,
10... Rotor of power generation device for ignition, 11...
・Cooling air passage, 12... Axial flow fan, 13.
...Outer space, 14...Inner space, 24...Ignition power generation device.

Claims (1)

[Claims] 1. A working vertical shaft generator 2 and a cooling fan 3 are arranged in this order above the air-cooled vertical pongee engine 1, and the output shaft 4 of the engine is
The rotor shaft 5a of the rotor 5 of the generator 2 and the cooling fan 3
The outer periphery of the generator 2 is covered with a wind guide case 6, and the suction force of the cooling fan 3 directs the cooling air from bottom to top to the cylinder 7 and cylinder head 8 of the engine 1.
After blowing through, the outer peripheral space 13 of the stator 9 of the generator 2
In the cooling system for a forced air-cooled vertical-type engine generator configured to blow air into the internal space 14, the rotor 10 of the ignition power generation device 24 of the engine 1 is disposed between the engine 1 and the generator 2. , is interlocked and connected to the output shaft 4 of the engine 1, and a cooling air passage 1 is connected to the rotor 10 of the ignition power generation device 24.
1, and an axial fan 12 is installed in the cooling air passage 11 facing the internal space 14 of the working generator 2 from below.
A cooling device for a forced air-cooled vertical shaft engine generator, characterized in that it is fixedly installed at zero.