JPH10176852A - Tunnel ventilation fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the effective feed of a power to a drive device as a pressure loss is supported by a method wherein moving blades are rotatably mounted on the two ends of the drive device disposed in a duct, a plurality of stationary blades are arranged in a protruding manner radially from the drive device, and a electric wire to feed a power to the drive device is inserted in the stationary blade. SOLUTION: A tunnel ventilation fan attached at the ceiling part of a long tunnel is formed such that a drive device 3, such as an electric motor, is disposed in a duct 1, and moving blades 4 are rotatably mounted on a drive shaft. A muffling cone 7 on which a sound absorbing material 6 is mounted, is supported on an opposite drive device 3 side of a boss part 5 of each moving blade 4. In this case, a plurality of stationary blades 10 are arranged in a protruding state radially from the drive device 3, and electric wires to feed a power to the drive device 3 are embedded in a bundle-undone state in one of the static blades 10. The drive device 3 is supported in the duct 1 by a plurality of the stationary blades 10. This constitution causes the rational feed of a power to the drive device as a pressure loss is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel ventilation fan, and more particularly, to a tunnel ventilation fan capable of supplying power to a driving device while suppressing a pressure loss.

[0002]

2. Description of the Related Art Generally, a tunnel ventilation fan is attached to a ceiling of a long tunnel or the like.

[0003] In the tunnel ventilation fan, as shown in FIG. 3, a driving device 3 such as an electric motor is disposed at a central portion in a cylindrical duct 1 via a supporting member 2. The rotor blades 4 are respectively attached to drive shafts (not shown) protruding from
Is rotatably mounted.

[0004] A noise-absorbing cone 7 having a sound-absorbing material 6 attached thereto is provided on the boss portion 5 side of each rotor blade 4 on the side opposite to the driving device 3, and the noise-absorbing cone 7 is supported by a stationary blade 8. .

[0005] In the figure, reference numeral 9 denotes an electric wire protection tube through which electric wires for supplying electric power to the driving device 3 pass.

According to such a configuration, when power is supplied to the driving device 3 such as an electric motor via the electric wire passed through the electric wire protection tube 9 and the driving device 3 is driven, the moving blade 4 is rotated. , Ventilation in the tunnel is performed.

[0007]

However, the above-mentioned conventional tunnel ventilation fan has the following problems.

That is, power is supplied to the driving device 3 such as an electric motor through the electric wire passed through the electric wire protection tube 9, but according to recent verification, the pressure loss due to the electric wire protection tube 9 is reduced. It was also found that the pressure loss was as large as 15% of the total pressure loss.

The present invention has been made in view of the above circumstances, and has as its object to provide a tunnel ventilation fan capable of supplying power to a driving device while suppressing pressure loss.

[0010]

According to the present invention, a moving blade 4 is rotatably mounted on each end of a driving device 3 disposed in a duct 1, and a plurality of stationary blades 10 are radially provided from the driving device 3. The present invention relates to a tunnel ventilation fan characterized in that it protrudes and passes an electric wire 11 for supplying electric power to the driving device 3 inside the stationary blade 10.

According to the above means, the following effects can be obtained.

In the present invention, since the electric wire 11 for supplying electric power to the driving device 3 is passed through the inside of the stationary blade 10 projecting radially from the driving device 3, the electric wire protection tube 9 having a circular cross section is provided. As compared with the case where the electric wire 11 is connected by using the electric wire 11, the flow separation phenomenon and the like are less likely to occur, so that the pressure loss can be greatly reduced.

If the stationary blade 10 is not provided between the moving blades 4 and 4, the swirling flow generated by the preceding moving blade 4 will flow into the following moving blade 4 as it is, and the following moving blade 4 4 cannot provide a larger swirling force, so the ventilation efficiency is not so good. However, by providing the stationary blades 10 between the moving blades 4, 4, the swirling flow generated by the preceding moving blade 4 can be reduced. Since the flow can be rectified into the axial flow by the stationary blades 10 and then flow into the moving blades 4 in the subsequent stage, a sufficient rotating force can be given again by the moving blades 4 in the subsequent stage. Minute, ventilation efficiency can be improved.

Furthermore, if the driving device 3 such as an electric motor is supported in the duct 1 by the plurality of stationary blades 10, it is possible to eliminate the supporting member 2 which has conventionally caused pressure loss. Further, the pressure loss can be reduced.

[0015]

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

FIG. 1 and FIG. 2 show an embodiment of the present invention.

Since the basic structure of the tunnel ventilation fan is the same as that of FIG. 3, the same parts are denoted by the same reference numerals and description thereof will be omitted.

In the present invention, a driving device 3 such as an electric motor
A plurality of stationary blades 10 are protruded radially from.

Then, a bundle of electric wires 11 for supplying electric power to the driving device 3 is scattered and embedded in one of the stationary blades 10.

Further, a driving device 3 such as an electric motor is connected to the duct 1 by a plurality of stationary blades 10 instead of the supporting member 2.
Be supported inside.

Next, the operation will be described.

The basic operation of the tunnel ventilation fan is the same as that shown in FIG.

In the present invention, the driving device 3 such as an electric motor
A bundle of electric wires 11 for supplying electric power to the drive device 3 is embedded in one of a plurality of stationary vanes 10 radially protruding from the inner surface, so that a circular cross-section electric wire protection is provided. Compared to the case where the electric wires 11 are connected using the pipe 9, the flow separation phenomenon and the like are less likely to occur, so that the pressure loss can be greatly reduced.

Also, in the case of FIG.
Is not provided, so that the swirling flow generated in the preceding moving blade 4 flows into the following moving blade 4 as it is, so that a larger turning force cannot be given by the following moving blade 4, Although the ventilation efficiency was not so good, by providing the stationary blade 10 between the moving blades 4 and 4, the swirling flow generated in the preceding moving blade 4 was rectified into the axial flow by the stationary blade 10, and then Since it becomes possible to flow into the moving blade 4, a sufficient turning force can be given again by the moving blade 4 at the subsequent stage, and the ventilation efficiency can be improved accordingly.

Further, by supporting the driving device 3 such as an electric motor in the duct 1 by the plurality of stationary blades 10, it is possible to eliminate the supporting member 2 which has conventionally caused the pressure loss. Thus, the pressure loss can be reduced.

It should be noted that the present invention is not limited only to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.

[0027]

As described above, according to the tunnel ventilation fan of the present invention, there is an excellent effect that power can be supplied to the driving device while suppressing pressure loss.

[Brief description of the drawings]

FIG. 1 is a partially broken schematic perspective view of an example of an embodiment of the present invention.

FIG. 2 is a sectional view of a stator vane newly provided for power supply.

FIG. 3 is a schematic perspective view of a conventional example with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duct 3 Drive 4 Moving blade 10 Stator blade 11 Electric wire

Claims (1)

[Claims] A rotor (4) is rotatably mounted on each end of a drive device (3) disposed in a duct (1), and a plurality of stationary blades (10) are radiated from the drive device (3). ), And a wire (11) for supplying electric power to the driving device (3) is passed through the inside of the stator vane (10).