KR101187891B1 - Variable vane module and air supply apparatus for fuel cell having the same - Google Patents

Abstract

It is an object of the present invention to provide a variable vane module that can reduce the thermal deformation of a component according to the material properties at high temperatures, and at the same time can operate stably even when thermal deformation occurs. In addition, to provide a fuel cell air supply device having such a variable vane module. To this end, in the present invention, the housing; A variable adjustment ring rotatably installed in the housing and having a plurality of pins protruding therefrom; A number of oscillating hitches corresponding to the number of the pins which are pivoted by a predetermined angle as the variable adjustment ring is rotated by a predetermined angle so that the groove of the variable adjusting ring is guided; And it provides a variable vane module having a variable vane rotatably coupled to each oscillating hitch, and provides a fuel cell air supply device having the same.

Description

Variable vane module and air supply apparatus for fuel cell having the same

1 is a view schematically showing the configuration of a fuel cell air supply apparatus according to the present invention.

FIG. 2 is an enlarged view of part II of FIG. 1. FIG.

Figure 3 is an exploded perspective view schematically showing the configuration of the variable vane module according to the present invention.

4 is a view illustrating a coupling relationship between an oscillating hitch, a pin, and a variable vane in the variable vane module illustrated in FIG. 3.

Description of the Related Art

52: impeller 53: compressor scroll

64: turbine wheel 65: turbine scroll

70: variable vane module 71: variable vane

72: pin 74: pivot bush

75: housing 76: variable adjustment ring

77: needle bearing 79: oscillating hitch

80: hydraulic cylinder 121: magnetic rotor portion

122: stator 150, 152, 155: flow of fluid

200: fuel cell

The present invention relates to a variable vane module capable of stable operation and a fuel cell air supply device having the same, and more particularly, to a variable vane module having a simple configuration and low thermal deformation, which enables stable operation and improved efficiency, and the same. One relates to an air supply system for a fuel cell.

Variable vanes can be used in air compressors, refrigerant compressors, turbochargers, fuel cell air supplies, auxiliary power units (APUs), small engines, aircraft engines, train engines, marine engines, etc. This function controls the flow amount of the high temperature flow supplied to the turbine.

Conventional variable vanes have been mainly used in products designed by combining journal bearings and general bearings such as ball bearings, roller bearings, and the like, in particular, turbines have been configured to operate at low temperatures.

Conventional variable vanes have the disadvantage that it is difficult to operate in a state exposed to high temperature due to the heat deformation of the component according to the material properties because the appropriate cooling means are not arranged together. Therefore, the necessity of developing a variable vane that can operate stably even at high temperature has emerged.

The present invention is to solve the above problems, an object of the present invention is to reduce the thermal deformation of the component according to the material properties at high temperature, and at the same time the variable that can be made stable operation even if the thermal deformation occurs To provide a vane module. In addition, to provide a fuel cell air supply device having such a variable vane module.

According to an aspect of the present invention,

housing;

A variable adjustment ring rotatably installed in the housing and having a plurality of pins protruding therefrom;

A number of oscillating hitches corresponding to the number of the pins which are pivoted by a predetermined angle as the variable adjustment ring is rotated by a predetermined angle so that the groove of the variable adjusting ring is guided; And

This is accomplished by providing a variable vane module having variable vanes rotatably coupled to each oscillating hitch.

Here, it is preferable to further include a bearing disposed between the housing and the variable adjustment ring to lubricate the rotational friction of the variable adjustment ring.

Here, it is preferable to further include a hydraulic cylinder coupled to one side of the variable control ring to rotate the variable control ring a predetermined angle.

In addition, the object of the present invention as described above,

In a fuel cell air supply apparatus in which a compressor impeller, a magnetic rotor portion, and a turbine wheel are located on the same axis,

And a variable vane module for guiding hot gas flow to the turbine wheel,

The variable vane module,

housing;

A variable adjustment ring rotatably installed in the housing and having a plurality of pins protruding therefrom;

An oscillating hitch corresponding to the number of the pins which are pivoted by a predetermined angle as the groove of the variable adjusting ring is guided so that the variable adjusting ring is rotated by a predetermined angle; And

It is achieved by providing a fuel cell air supply having variable vanes rotatably coupled to each oscillating hitch.

Here, it is preferable to further include a bearing disposed between the housing and the variable adjustment ring to lubricate the rotational friction of the variable adjustment ring.

Here, it is preferable to further include a hydraulic cylinder coupled to one side of the variable control ring to rotate the variable control ring a predetermined angle.

Here, the variable vane module is preferably located between the turbine wheel and the impeller.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 shows a cross-sectional view of an air supply with a variable vane module according to the invention, and FIG. 2 shows an enlarged view of part II of FIG. 1.

As shown in FIGS. 1 and 2, the fuel cell air supply apparatus according to the present invention includes a magnetic rotor 121, a stator 122, a compressor, and a turbine.

The central axis of the magnetic rotor 121 is integrally connected with the rotating shaft of the compressor and turbine. An impeller 52 is coupled to the rotating shaft of the compressor, and the compressor sucks air from the outside along the paths 150 and 152 by the rotation of the impeller 52, compresses the air, and compresses the fuel cell. 200). Some air may act as a cooling fluid that moves in the direction of the turbine wheel 64 to prevent the turbine from overheating, and the flow through the impeller 52 passes through the housing back of the variable vane 71 of the turbine and The variable vanes 71 of the turbine can function as a cooling fluid to prevent overheating.

The fuel cell 200 generates electric power by reacting the air transferred through the air supply device with hydrogen, and after the reaction, some unreacted fuel is discharged and burns the discharged fuel to generate hot gas. Let's do it. This hot gas is supplied to the turbine along the path shown at 155 to provide power to rotate the turbine wheel 64. In this way, a part of the power for rotating the impeller 52 of the compressor can be partially recycled and utilized from the hot gas produced in the fuel cell 200. In addition, a combustion chamber (not shown) for burning fuel from the fuel cell 200 may be further disposed in various forms between the fuel cell 200 and the turbine in order to improve the efficiency of the turbine.

In the turbine, hot gas is injected into the turbine wheel 64 to rotate the turbine wheel 64 to convert the flow energy of the combustion gas into a rotational force that is mechanical energy. As the turbine wheel 64 rotates, the magnetic rotor 121 of the power generation unit integrally coupled to the rotation shaft of the turbine wheel 64 rotates. The magnetic rotor 121 is rotated in a state in which a magnetic field is formed by the stator 122 installed in the power generation unit. Accordingly, the magnetic rotor 121 generates a current while changing the magnetic field formed by the stator 122 to function as a generator.

At room temperature, the fluid flowing through the impeller 52 and the compressor diffuser of the compressor to the compressor scroll 53 passes through the rear surface of the variable vane module, thereby cooling the variable vane 71 and the parts disposed therein. Function Accordingly, it is possible to reduce heat deformation in the variable vane 71 which is likely to cause severe heat deformation by the high temperature fluid.

FIG. 3 is an exploded perspective view of the variable vane module according to the present invention, and FIG. 4 is a view showing the coupling relationship between the variable vane, the oscillating hitch, the pin and the pivot bush in more detail.

As shown in the drawings, the variable vane module 70 according to the present invention includes a housing 75, a needle bearing 77, a variable adjustment ring 76, a plurality of oscillating hitches 79 and the oscillating hitch ( The number of variable vanes 71 corresponding to the number of 79 is provided. The housing 75, the needle bearing 77, and the variable adjustment ring 76 are sequentially coupled to each other, and the variable vane 71 is coupled to the rotation shaft 71a by being inserted into the oscillating hitch 79. do. A pivot bush 74 is coupled to the coupling portion of the oscillating hitch 79 and the variable vane 71 so that the oscillating hitch 79 and the variable vane 71 move integrally. The oscillating hitch 79 is provided with a groove 79a having a predetermined width in the direction of the variable adjustment ring 76, and the variable adjustment ring 76 has a diameter corresponding to the width of the groove 79a. The pin 72 is installed. The pin 72 may be inserted into and installed in the groove 76a formed in the variable adjustment ring 76. The pin 72 provided in the variable adjustment ring 76 is positioned in a state of being received in the groove 79a formed in the oscillating hitch 79. Meanwhile, a hydraulic cylinder 80 may be connected to the variable adjustment ring 76 so that the variable adjustment ring 76 may be rotated by a predetermined angle and reversely rotated.

In this coupled state, when the variable adjustment ring 76 is rotated by the hydraulic cylinder 80 by a predetermined angle with respect to the housing 75, the pin 72 slides on the groove 79a and the oscillating. The hitch 79 is pushed so that the variable vane 71 is rotated a predetermined angle. That is, the variable adjustment ring 76 is rotated using the hydraulic cylinder 80, and thus the variable vanes 71 are configured to rotate by a predetermined angle.

In the variable vane module 70 according to the present invention, by pushing the oscillating hitch 79 from the inner wall of the groove 79a while the pin 72 is accommodated in the groove 79a of the oscillating hitch 79. It has a configuration that allows the oscillating hitch 79 and the variable vane 71 to rotate a predetermined angle. Accordingly, the number of the variable members is limited to two members, the variable adjusting ring and the oscillating hitch combined with the variable vane, thereby having a simple configuration. In addition, it is preferable to adjust the diameter of the pin 72 and the width of the groove so as to smoothly implement the movement even when thermally expanded. Particularly, in the fuel cell air supply apparatus having the variable vane module according to the present invention, a high temperature flow passes through the variable vane and the connection portion of the variable adjusting ring and the housing for operating the variable vane is connected to the needle bearing. Since the high temperature flow does not pass through the portion where the needle bearing is located, thermal expansion of the members can be avoided in the portion where the needle bearing is located, so that the movement of the variable members can be smoothly maintained even when operating at a high temperature. .

Meanwhile, as shown in FIG. 1, in the fuel cell air supplying apparatus including the variable vane module of the present invention, the variable vane module is disposed between the impeller of the compressor and the turbine wheel, thereby allowing flow at room temperature to pass through the compressor impeller. By having a configuration that can be cooled by the variable vane has a configuration that can ensure the stability of the operation even when the turbine is driven by a high temperature flow.

As described above, in the variable vane module of the present invention, the number of the variable structure components constituting the variable vane is small, thereby avoiding a phenomenon in which the operating performance is greatly reduced with high temperature. In addition, the fuel cell air supply apparatus according to the present invention has a configuration in which the variable vane module is disposed between the impeller of the compressor and the turbine wheel, the variable vane can be cooled by the flow of the room temperature passing through the compressor impeller.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (5)

A housing 75; A variable adjustment ring (76) rotatably installed in the housing (75) and having a plurality of pins (72) protruding therefrom; Grooves 79a through which the pins 72 of the variable adjustment ring 76 are guided are formed so that the number corresponding to the number of the pins 72 rotated by a predetermined angle as the variable adjustment ring 76 is rotated by a predetermined angle. Oscillating hitch 79; Variable vanes 71 rotatably coupled to each oscillating hitch 79; And And a bearing (77) disposed between the housing (75) and the variable adjustment ring (76) to lubricate the rotational friction of the variable adjustment ring (76). delete In the fuel cell air supply apparatus in which the compressor impeller 52, the magnetic rotor portion 121, and the turbine wheel 64 are located on the same axis, And a variable vane module 70 for guiding hot gas flow to the turbine wheel 64, The variable vane module 70, A housing 75; A variable adjustment ring (76) rotatably installed in the housing (75) and having a plurality of pins (72) protruding therefrom; Grooves 79a through which the pins 72 of the variable adjustment ring 76 are guided are formed so that the number corresponding to the number of the pins 72 rotated by a predetermined angle as the variable adjustment ring 76 is rotated by a predetermined angle. Oscillating hitch 79; And And a bearing (77) disposed between the housing (75) and the variable adjustment ring (76) to lubricate the rotational friction of the variable adjustment ring (76). delete The method of claim 3, The variable vane module is a fuel cell air supply device located between the turbine wheel and the impeller.

Images