JPS6343978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a cooling outside air cleaning wind tunnel for a rotating electrical machine for a vehicle.

[Technology background]

Rotating electric machines for vehicles, such as motor generators (hereinafter referred to as MG)
) has a built-in ventilation fan that sucks in outside air.
The interior of the MG aircraft is ventilated and cooled. Since the MG is suspended from the car body, the outside air it takes in is mixed with dust kicked up by the wind, water droplets from rain, and snow when it snows. For this reason, an air purifier is installed at the outside air intake of the MG to purify the outside air taken in.
Prevents contamination inside the MG aircraft.

In FIGS. 1 and 2, a part 2 such as an exciter is protruded from the outside air intake side of the MG 1, and an intake outside air purifying device 3 is constructed on the outer periphery of this part, and extends along the entire length of the MG. It is made smaller by making l as short as possible.

The outside air that flows in from the outside air intake port 4 that opens downward rises in the wind tunnel 4a, and flows into the MG machine from the upper air inlet port 5. The space inside the wind tunnel 4a is enlarged to reduce the wind speed and to separate heavy dust, iron powder, water droplets, etc. mixed in the air and allow them to fall downward, allowing purified air to enter the MG machine. There is.

Previously, a narrow-mesh filter was used to filter and purify the intake air, but this method had the disadvantage of reducing cooling efficiency due to filter clogging, which required periodic maintenance and inspection. Ta. In order to eliminate maintenance, devices that do not use filters are being adopted.

However, for example, in a vehicle MG, there is a limit to increasing the space in the wind tunnel 4a, and as a result, it is difficult to reduce the wind speed of the inflowing air to a point where it is sufficiently effective, so separation and removal of dust, water droplets, etc. is insufficient. Therefore, there was a drawback that it flowed into the MG plane. Also
If the inside of the MG machine becomes dirty, the insulation of the insulating parts will deteriorate, requiring early disassembly and maintenance. To solve this problem, a cooled outside air cleaning wind tunnel is required that can separate and remove contaminants including dust.

[Purpose of the invention]

The present invention removes the cooled outside air by installing a special wind tunnel, that is, a purification port that separates dust, iron powder, water droplets, etc. with high specific gravity from the clear stream, and a dust collection chamber that collects this, thereby preventing it from flowing into the MG. The purpose is to prevent contamination, eliminate contamination, and extend the disassembly and maintenance period.

[Structure of the invention]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 and 4, the cooling outside air cleaning wind tunnel 6 attached to the MG 1 has outside air intake ports 7a, 7b opening downward on both left and right sides, and rising wind tunnels 8a, 8b configured inside each. and descending wind tunnel 9a,
9b and are connected so as to overlap each other.

The tips of the ascending wind tunnels 8a and 8b are connected to and communicate with a clean air wind tunnel 11 formed on the outer periphery of the protrusion 2 of the MG 1 so as to meet at the upper clean air inlet 10, while the descending wind tunnel The tips of 9a and 9b communicate with each other through lower clean air inlets 12a and 12b, respectively. This clean air wind tunnel 11 communicates with the inside of the MG machine through an inlet inlet 17 inside the machine.

A dust collection chamber 14 is formed below the clean air wind tunnel 11, and a cover 15 is attached to the bottom of the dust collection chamber 14. A lower dust collection port 13 is provided at the tip of each of the descending wind tunnels 9a, 9b and communicates with a dust collection chamber 14. Moreover, upper dust collection ports 16a, 16b are provided at the tips of the ascending wind tunnels 8a, 8b. As shown in FIGS. 5 and 6, the upper dust collection ports 16a, 16b are connected to the upper dust collection ports 16a, 16b by a partition plate 18.
6b is vertically and diagonally partitioned so as to become narrower as it goes downstream from the inlet part, forming two wind tunnels, each of which has a dust port 1 that opens downward at each end.
9a ₁ and 19b ₁ are provided, and dust descending wind tunnels 19a and 19b are provided below these to communicate with the lower dust collection chamber 14. Lower clean air inlets 12a and 12b are arranged symmetrically on the lower oblique side of the wind tunnel member 6a.
This cooling outside air cleaning wind tunnel for a rotating electrical machine is characterized in that it is configured to communicate with the dust collecting chamber 14 through lower dust collecting ports 13a and 13b.

Hereinafter, the effects of the present invention will be explained.

In FIGS. 3 to 6, the outside air intake port 7a,
The outside air flowing in from 7b is divided into outside air A, which enters the descending wind tunnels 9a, 9b, and outside air B, which enters the ascending wind tunnels 8a, 8b. And descending wind tunnels 9a, 9b
The outside air A that has descended from the center makes a sudden direction change toward the center, and then flows into the clean air wind tunnel 11 through the lower clean air inlets 12a and 12b. During this sudden direction change, impurities a1 such as dust, water droplets, and snow that are heavier than the air mixed in the outside air go straight due to the action of inertia and enter the dust collection chamber 14 through the lower dust collection ports 13a and 13b. It enters and is stored. Therefore, the air a flowing into the interior through the lower clean air intake port 12 has impurities separated and removed and is purified.

Next, the outside air B that entered the rising wind tunnels 8a and 8b is
After rising and swirling in a fan shape, the clean air flows into the clean air wind tunnel 11 from the upper clean air inlet 10. On the other hand, the air containing the internal dust of outside air B has a specific gravity heavier than air in the fan shape swirling process. Impurities b1 such as dust, water droplets, and snow enter along the outer peripheral wall due to the action of inertia, and are gradually narrowed in the section from the entrance of the upper dust collection ports 16a and 16b to the dust fall wind tunnels 19a and 19b by the partition plate 18. The airflow enters the dust-falling wind tunnels 19a, 19b while gradually increasing its flow velocity, and after descending, it reaches the dust collection chamber 14 below and is collected therein.

Therefore, the air b flowing into the interior from the upper clean air inlet 10 has impurities separated and removed and is purified.

The purified outside air that has flowed into the clean air wind tunnel 11 flows into the MG machine from the in-machine inlet 17. The removed impurities are collected in the lower dust collection chamber 14, and can be discarded by removing the cover 15 if necessary.

[Overall effect]

As described above, the present invention uses inertia force to separate and remove impurities mixed in the cooled outside air taken in, so it has excellent cleaning ability and can prevent fouling inside the machine, extending the disassembly and cleaning period of the MG. As a result, maintenance time can be shortened and cooling performance can be maintained constant for a long time. In addition, the removed impurities are stored in the dust collection chamber below and can be easily disposed of when necessary, making them easy to handle.Furthermore, clean air and dust can be easily separated without increasing the size. An optimal outdoor air cleaning wind tunnel for cooling rotating electric machines for vehicles can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front sectional view of a conventional cooling outside air clean wind tunnel for a rotating electric machine, Figure 2 is a cross-sectional view of Figure 1, and Figure 3
The figure is a sectional view of the cooled outside air clean wind tunnel of the rotating electric machine of the present invention, FIG. 4 is a sectional view of FIG. 3, FIG. 5 is a plan view of FIG. 3, and FIG. 6 is a sectional view of FIG. It is. 6... Cooling outside air cleaning wind tunnel, 7... Outside air intake, 8...
Rising wind tunnel, 9... Descending wind tunnel, 10... Upper clean air inlet, 11... Clean air wind tunnel, 12... Lower clean air inlet, 13... Lower dust collection port, 14... Dust collection chamber, 16
...Upper dust collection port, 17...In-machine inlet, 18...Partition plate, 19...Dust fall wind tunnel.

Claims (1)

[Claims] 1.In a machine equipped with a rotating electrical machine, a fan to cool it, and a wind tunnel that has outside air intakes in two directions on the left and right to send outside air into the rotating electrical machine, an ascending wind tunnel that guides the outside air upward and downward from the outside air intake that opens downward, and A descending wind tunnel is provided, and the ascending wind tunnel is provided so that a clean air wind tunnel is superimposed on the inner swirling side of the airflow, and a dust air wind tunnel is superimposed on the outer swirling side, and a space is provided around the protruding part of the rotating electric machine to guide clean air in the two directions. An upper clean air inlet was provided at the upper part of the circular wind tunnel member, while 2
The upper dust air wind tunnel that guides the dust air in the direction shown in the above 2
At the point where the airflows in the directions intersect, the width of the wind tunnel becomes gradually narrower along the air direction, forming two wind tunnels, and a dust collection port that opens downward is provided at each end. A dust descending wind tunnel is provided at the bottom and communicates with the lower dust collection chamber, and the descending wind tunnel communicates with the lower clean air inlet located symmetrically on the lower inclined side of the wind tunnel member, and also collects dust through the lower dust collecting port. A wind tunnel for cooling outside air for a rotating electric machine, characterized in that it is configured to communicate with each chamber.