KR20110037042A - Axial flow fan assembly - Google Patents

Abstract

PURPOSE: An axial flow fan assembly is provided to facilitate manufacture and reduce costs for power generation. CONSTITUTION: An axial flow fan assembly comprises a case(100), a rotary shaft, an impeller(300), an electric motor(400), and a generator(500). Both sides of the base are opened. The rotary shaft is arranged in the central axis of the case. The impeller is connected to the rotary shaft. The electric motor rotates the rotary shaft according to electric power supply and guides the outflow of the air into an outlet through the impeller. The generator generates power according to the operation of the impeller rotated by the natural wind.

Description

Axial Flow Blower {AXIAL FLOW FAN ASSEMBLY}

The present invention relates to an axial blower, and more particularly, to produce electric energy by using an axial blower that rotates by vehicle driving wind or natural wind during the idle period of the axial blower, and can be easily and simply generated at low cost. It is about a blower.

Axial blowers are commonly used for ventilation of buildings, gangs and tunnels in conjunction with electric motors. In particular, the axial blower is often installed in the form of a jet fan inside a tunnel such as a highway or a railway, a high-speed train or subway, such a jet fan does not operate unless a specific condition such as a fire usually occurs. . In other words, the jet fan is not running for longer than the time it takes to act as a blower, that is, the idle time is much longer.

However, the jet fan continues to rotate freely by the driving wind, that is, the vehicle driving wind or the natural wind, which is generated when a vehicle such as a car, subway, railway, etc. passes. Accordingly, there have been attempts to produce electric energy by generating power using an axial blower that is rotated by vehicle driving wind or natural wind.

In particular, since the structure of the electric motor and the generator is the same or similar, there has been an effort to achieve the function of the generator together with the function of the motor in the structure itself using the motor such as an axial blower.

However, in order to make such power generation possible, for example, the axial blower must exceed the synchronous speed of the motor in order to generate wind power using the motor. However, the rotation by the vehicle driving wind or the natural wind is difficult to satisfy the rotational speed. It was impossible.

In order to solve this problem, the speed was increased by installing a speed increaser or a separate power transmission, but this increased the size of the axial blower and increased the cost of manufacturing, installation, maintenance, etc., resulting in low efficiency.

On the other hand, the Republic of Korea Patent Publication No. 10-2002-0034120 "electric generator" is composed of an electric winding (electric part) and a power generation winding (power generation) independently of a single stator by applying a motor of a single power function Power is obtained by rotating the rotor with the power supplied to the motor windings, and the rotor rotates around the power generation winding independently configured on the other side to draw electricity induced in the power generation winding and resupply or supply extra power to the motor. A technique for industrially using current is disclosed.

However, such a "electric generator" is integrated to produce an induction electricity (power) in the power generation unit when the electric drive is driven (rotated) by the power supply, which is not feasible to violate the law of energy invariance. .

As shown in a graph showing general characteristics of the induction motor shown in FIGS. 7A and 7B, the primary current of the motor, that is, the load current is changed by the rotational force (torque) required for the motor.

That is, when 100% of the rated load torque is required, the rated load current supplied to the motor also needs 100% of the rated load current, and when the load demand torque changes, for example, the load demand torque reaches 50%, Supply current is also reduced proportionally.

In other words, the above-mentioned "electric generator" does not take into consideration problems such as mechanical friction loss, loss of thermal energy, loss of air resistance during rotation, etc., and is operated by being supplied with power consumption in accordance with the power required for the electric drive. Nevertheless, it is described that additional current is supplied as a separate redundant.

The present invention is to solve and solve all the problems caused by the conventional axial blower as described above,

SUMMARY OF THE INVENTION An object of the present invention is to provide an axial blower capable of producing electrical energy using an axial blower that is rotated by vehicle driving wind or natural wind during the idle period of the axial blower.

Another object of the present invention is to provide an axial blower which is easy and simple and can be developed at low cost.

According to the present invention for achieving the above object, in the axial flow blower, both sides open the case; A rotating shaft disposed on the central axis of the case; An impeller connected to the rotating shaft and operated; An electric motor disposed on one side of the rotating shaft and configured to blow the air to the outlet through the impeller by rotating the rotating shaft according to a power supply; And a stator disposed at the other side of the rotating shaft and fixed to the rotor and the case rotating by the rotating shaft, the stator being rotatably installed therein, wherein the impeller rotated by natural wind flowing through the inlet when the electric motor is stopped. Generator to generate power in accordance with the operation of; It provides an axial blower comprising a.

A first key inserting portion is formed on an outer surface of the rotating shaft, and a second key inserting portion corresponding to the first key inserting portion is formed on an inner surface of the rotor, and the rotor and the rotor are formed by keys inserted into the first and second key inserting portions. The rotating shaft may be configured to be rotatably coupled at the same time.

The stator may be configured to skew and minimize the generation of vibration and noise due to the rotation of the rotor.

It may be configured to include a support means for supporting by connecting the inside of the case and the outside of the motor or generator.

According to the axial flow blower according to the present invention, there is an effect that can produce electrical energy by using the axial flow blower rotated by the vehicle driving wind or natural wind during the idle period of the axial flow blower.

In addition, the present invention is easy and simple, there is an effect that can be developed at a low cost.

Hereinafter, with reference to the drawings will be described in detail. However, these drawings are for illustrative purposes only and the present invention is not limited thereto.

1 (a) and (b) are views of the axial blower according to the first embodiment of the present invention, Figure 2 (a) and (b) is a view of the axial blower according to the second embodiment of the present invention to be.

First, referring to (a) and (b) of FIG. 1, the axial flow blower 10 according to the first embodiment of the present invention has a case 100, a rotation shaft 200, an impeller 300, and an electric motor 400. And a generator 500.

Case 100 is formed in a shape that forms the appearance of the axial blower 10 is commonly used, both sides are open so that one side of the air flows in, the other side of the air flows out.

The rotary shaft 200 is disposed on the central axis of the case 100 and is connected to the electric motor 400 and the generator 500 described below.

The impeller 300 is connected to the rotary shaft 200 apart from the electric motor 400 and the generator 500, and rotates by the electric motor 400 to perform a blowing function or to rotate by a vehicle driving wind or natural wind.

An electric motor 400 is a machine that converts electrical energy into mechanical energy and is also commonly referred to as a motor. In the present invention, an AC motor, particularly an induction motor, is used. The electric motor 400 is disposed on one side of the rotary shaft 200, the power is supplied through the electric motor terminal box 402 provided on the case 100 in the drawing to rotate the rotary shaft 200 through the impeller 300 It is operated to blow air, that is, to let air out.

The generator 500 is disposed on the other side of the rotation shaft 200 and is generated according to the operation of the impeller 300 which is rotated by the vehicle driving wind or natural wind that is introduced when the electric motor 400 is stopped. Then, the electrical energy produced by the generator 500 is charged to the storage battery (not given) through the generator terminal box 502. In the present invention, the permanent magnet multipole synchronous generator 500 is used, but a servo motor, a brushless motor (BLDC), or the like may be used.

Here, the axial blower 10 according to the first embodiment of the present invention, in addition to the above-described components, various components which are the same as or similar to those of a conventional jet fan are arranged. That is, the inner body 102 is installed inside the case 100, and the rotation shaft 200 is disposed on the central axis of the inner body 102. In addition, a plurality of guide vanes 104 are provided to connect the case 100 and the inner body 102. In addition, a coupling 202 is mounted on the rotation shaft 200 at a predetermined distance from the inner body 102, and the hub 204 is fitted to the coupling 202. The impeller 300 is mounted to the hub 204, and the hub cap 302 is fitted to the impeller 300.

On the other hand, the motor 400 used in the axial blower 10 according to the first embodiment of the present invention shown in Figures 1 (a) and (b) is a flange (FLANGE) type (TEAO: Totally enclosed Air Over) As a result, the electric motor 400 is arranged in a floating state in the case 100. Accordingly, the structural safety of the mounting of the motor 400, the vibration of the motor 400 during the operation of the motor 400 or the rotation of the impeller 300 may occur relatively large, so the inside of the case 100 and the motor 400 Is supported to support the electric motor 400 by connecting between the support means 404, ie, the support bar.

Alternatively, the axial blower 10 according to the second embodiment of the present invention shown in FIGS. 2A and 2B is almost similar to the axial blower 10 according to the first embodiment described above, but the first Unlike the motor 400 used in the embodiment, a foot-mounted (FOOT-MOUNTED) type (a totally enclosed external type, a totally enclosed fan cooled) is used to basically form a seat formed in the case 100. It is configured to be mounted on the base 406 can be used stably, and there is a difference in that it does not use the support means 404 used in the first embodiment.

3 is a view showing an electric motor and a generator inside the axial blower shown in (a) and (b) of FIG. 1 and (a) and (b) of FIG. 4 are shown in (a) and (b) of FIG. Is an enlarged view of a rotor of a motor and a generator. And (a) and (b) of Figure 5 is a view showing in detail the rotor of the generator shown in (a) and (b) of Figure 4, Figures 6 (a) and (b) is Figure 3 Figure is an enlarged view of the stator of the generator shown in.

As shown in Figures 3 to 6 (a) and (b), the electric motor 400 used in the present invention is the same as the configuration of a general electric motor used. The basic configuration of the motor 400 is largely divided into a rotating part (rotor 410) and a fixed part (stator, 420).

The rotor 410 forms a cage with a rod made of copper and aluminum, etc., which are pressed onto the rotating shaft 200, and a winding (coil) is formed.

The stator 420 is formed between an iron core (core) made by stacking a plurality of steel sheets or silicon steel sheets to have a cylindrical shape, and a plurality of grooves, that is, slots, formed at regular intervals along the circumferential direction on the inner circumferential surface of the iron core. It consists of a winding (coil) provided.

The rotor 410 is rotated while maintaining a predetermined gap with the stator 420. When the electric power is supplied to the motor 400, a rotor magnetic field is formed in the stator 420.

At this time, the induced electromotive force is induced in the coil of the rotor 410, and thus an induced current is generated in the rotor 410.

The rotation torque is generated by the interaction of the rotor flux (magnetic field) generated by the magnetization current flowing through the stator 420 winding and the induced current induced in the rotor 410 to generate electric power to drive the motor 400. That is to rotate the rotating shaft 200.

On the other hand, the generator 500 is also generally the same as the configuration of a general generator having a rotor 510 and a stator 520, the relative speed of the rotor 510 and the stator 520 is rotated in synchronization with the rotor magnetic field .

The rotor 510 of the generator 500 has a plurality of permanent magnets 512. The permanent magnets 512 are arranged such that the N pole and the S pole are alternated. At this time, the permanent magnet 512 reduces the centrifugal force generated in the permanent magnet 512 when the rotor 510 rotates by reducing the weight by using a smaller size to transmit external shock to the rotor 510. Even if the permanent magnet 512 may be prevented from being separated or damaged from the rotor 510. In addition, the permanent magnet 512 may be attached to the surface of the rotor 510 to form a magnetic field, but when installed in the rotor 510 embedded permanent magnet 512 according to the high-speed rotation of the rotor 510 ) Can be avoided and the power generation efficiency can be increased.

The stator 520 of the generator 500 is formed in the same manner as the stator 520 of the electric motor 400 and includes an iron core and a winding.

The generator 500 configured as described above is the generator 500 when the impeller 300 is rotated by the vehicle driving wind or natural wind during the idle period of the axial blower 10 in which the electric motor 400 is not driven to rotate the rotating shaft 200. The rotor 510 is rotated, and according to the rotation, an induction operation is generated between the permanent magnet 512 of the rotor 510 and the stator 520 winding, and a current is generated. Rather than being exhausted, the battery is charged through the generator terminal box 502 connected to the stator 520 winding and the connection line 504. Of course, a separate switch (not given) may be provided and supplied to a desired place according to the operation of the switch. In this case, as the storage battery, a lead storage battery, an alkaline storage battery, or the like may be used, and a capacitor may also be used.

The power thus stored may be used to turn on lamps in the tunnel, and may be configured to operate a lamp by automatically turning on / off the switch by sensing the amount of light in the tunnel that varies depending on day or night.

The present invention is to integrate the electric motor 400 and the generator 500 to be driven using the coaxial, and to perform the function of the blower, the electric motor 400 in the state of turning off the power terminal of the generator 500 Impeller to supply power to the rotating shaft 200 to perform the function of the blower, and does not need the function of the blower, the impeller to rotate naturally due to vehicle driving wind or natural wind in the idle period when the power is cut off to the motor 400 It is possible to generate power by converting the rotational energy of 300 into electrical energy using the generator 500.

As described above, in order to enable the motor 400 and the generator 500 to be coaxially driven, the present invention allows the generator 500 to be positioned in a space occupied by some components of a conventional motor. In other words, energy converters such as electric motors (electric to mechanical or mechanical to electrical) generally generate a loss in the process of performing the conversion, and heat, noise, and vibration are generated by the loss. Among these, heat is the largest specific gravity, and all the converters are provided with a cooling device for controlling heat. In particular, in the case of the electric motor 400, it is common to install a cooling fan on the rotary shaft 200 to cool the heat therethrough.

However, in the axial flow blower 10 according to the present invention, the air volume and the wind speed generated by the rotation of the impeller 300 are much larger than the air volume or the wind speed generated by a normal electric motor cooling fan, and the electric motor 400 is an impeller. It is placed in the flow of air generated and outgoing by the 300 so that there is no need for a cooling fan to cool the electric motor 400.

Therefore, the generator 500 is disposed instead of the cooling fan in the space where the cooling fan is disposed, and the rotation shaft 200 is extended to allow the generator 500 to be connected and operated. Here, the bearing 430 is disposed on both sides of the electric motor 400 to fix the rotating shaft 200 at a predetermined position, and to support the load applied to the rotating shaft 200 to smoothly rotate the rotating shaft 200.

In order to connect the generator 500 to the rotary shaft 200, a part of the electric motor bracket 440 forming the appearance of the electric motor 400 is processed to allow the generator 500 to be coupled, and the extended rotary shaft 200 Insert the rotor 510 of the generator 500. At this time, as shown in (a) and (b) of Figure 5 and the rotor 510 and the rotating shaft 200 of the generator 500 can be rotatably coupled at the same time and the rotor 510 side of the generator 500 A groove, that is, a first key inserting portion 210 is formed in a portion of the outer surface of the rotating shaft 200 to be coupled, and a hole or a groove corresponding to the first key inserting portion 210 is formed in the inner surface of the generator rotor 510. The second key inserting portion 514 is formed. Then, the key 530 is loosely pressed into the first and second key insertion parts 210 and 514 to fix the rotor 510 of the generator 500 with respect to the rotational direction of the rotation shaft 200.

Next, the motor 500 and the generator 500 are coaxially by fastening the release preventing holder 540 to the rotation shaft 200 using a bolt or the like so that the generator 500 does not escape in the direction in which the rotation shaft 200 is extended. It can be driven. At this time, in addition to the separation prevention holder 540 may be configured by inserting a stop clip.

On the other hand, the present invention is intended to generate power using this rotational force when the impeller 300 of the axial blower 10 is rotated by vehicle driving wind or natural wind during the rest period. However, when a current flows through the coil of the generator stator 520, the cogging torque is caused by the non-magnetic resistance of the magnetism of the coil of the stator 520 and the permanent magnet 512 provided in the rotor 510. Due to this, torque ripple and vibration of the rotating shaft 200 are caused.

Usually, the difference between the largest and smallest of the amount of change in torque felt while rotating the rotary shaft 200 of the motor 400 is referred to as cogging torque. The greater the cogging, the greater the torque ripple when driving the motor 400, and thus the less easy it is to control the motor 400.

When the axial blower 10 attempts to rotate by vehicle driving wind or natural wind, such cogging torque prevents smooth rotation and makes power generation difficult.

Thus, as illustrated in FIGS. 6A and 6B, the cogging torque may be reduced by skewing the slots 522 of the generator stator 520 by skewing them. Therefore, it is possible to smoothly rotate and generate power even in a weak vehicle driving wind or natural wind, and also reduce the occurrence of vibration and noise caused by the rotation of the rotor 510.

Meanwhile, although the generator stator 520 has been described as being stacked, the generator rotor 510, in particular, the permanent magnet 512 may be stacked, and both the stator 520 and the rotor 510 may be skewed. It may also be configured to be stacked.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1A and 1B are diagrams of an axial blower according to a first embodiment of the present invention.

2 (a) and 2 (b) are views of the axial blower according to the second embodiment of the present invention.

3 is a view showing an electric motor and a generator inside the axial flow fan shown in (a) and (b) of FIG.

4 (a) and 4 (b) are enlarged views of the rotor of the electric motor and the generator shown in FIG.

5 (a) and 5 (b) are detailed views of the rotor of the generator shown in (a) and (b) of FIG.

6 (a) and 6 (b) are enlarged views of the stator of the generator shown in FIG. 3.

FIG. 7A is a graph showing general characteristics of an induction motor, and FIG. 7B is an enlarged view of a portion of FIG. 7A.

Explanation of symbols on the main parts of the drawings

10: axial blower 100: case

102: inner body 104: guide vane

200: rotating shaft 202: coupling

204: hub 210: first key insertion unit

300: impeller 302: hub cap

400: motor 402: motor terminal box

404: support means 406: seating table

410, 510: rotor 420, 520: stator

430: bearing 440: bracket

500: generator 502: generator terminal box

504: connecting line 512: permanent magnet

514: second key insertion portion 522: the slot

530: key 540: separation prevention holder

Claims (5)

In axial blower, A case in which both sides are open; A rotating shaft disposed on the central axis of the case; An impeller connected to the rotating shaft and operated; An electric motor disposed at one side of the rotary shaft and configured to blow the air through the impeller to rotate the rotary shaft according to power supply; And It is disposed on the other side of the rotary shaft, and includes a stator that is rotated by the rotary shaft and the stator is fixed to the case in which the rotor is rotatably installed, the natural wind flowing through the inlet when the electric motor is stopped A generator for generating power according to the operation of the impeller rotated by; Axial flow blower comprising a. The method of claim 1, The first key insert is formed on the outer surface of the rotating shaft, A second key inserting portion corresponding to the first key inserting portion is formed on an inner surface of the rotor, And the rotor and the rotating shaft are rotatably coupled to each other by keys inserted into the first and second key insertion units. The method according to claim 1 or 2, The stator is skew (Skew) laminated axial blower, characterized in that to minimize the generation of vibration and noise caused by the rotation of the rotor. The method according to claim 1 or 2, An axial blower, characterized in that the support means for supporting by connecting the inside of the case and the outside of the electric motor or the generator. The method of claim 3, wherein An axial blower, characterized in that the support means for supporting by connecting the inside of the case and the outside of the electric motor or the generator.

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