KR101434909B1 - Scroll turbine system utilizing a scroll compressor/expander - Google Patents

Abstract

The present invention relates to a scroll turbine system using a scroll compressor / inflator, and is provided with a first fixed scroll (111) and a first orbiting scroll (112) which is eccentrically rotated with respect to the first fixed scroll (111) A scroll compressor (110) for compressing and exhausting gas; A second fixed scroll 121 and a second orbiting scroll 122 which is eccentrically rotated with respect to the second fixed scroll 121 are provided and the second orbiting scroll 122 is rotationally driven by a suction gas A scroll expander 120; A heating unit 130 for heating the gas discharged from the scroll compressor 110 to a high temperature and supplying the heated gas to the suction gas of the scroll expander 120; And a power transmission portion (141) (142) for transmitting rotation driving force of the second orbiting scroll (121) to the first orbiting scroll (112) to rotate the first orbiting scroll (112) It is possible to generate electric energy or to use it as a power source in combination with mechanical load in various forms. Also, since the structure is very simple, it can be applied in various forms, and strong shaft power can be obtained.

Description

Scroll turbine system using a scroll compressor / expander [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll turbine system using a scroll compressor / inflator, and more particularly, to a scroll turbine system that is simple in structure and simple in driving method and can be utilized as a low-vibration, high-efficiency power device.

Scroll compressors and expanders are used in various industrial fields such as refrigeration cycle, fuel cell BOP, etc. based on their strengths such as high efficiency, low vibration and low noise. The principle of the two devices is basically the same, and based on the inflator, the inflowing fluid expands between the orbiting scroll and the fixed scroll, causing the orbiting scroll to rotate.

The circular motion of the scroll disk generated by the rotating orbiting scroll can be converted into the circular motion in the desired direction by the eccentric shaft. The scroll compressor operates on the principle of the opposite principle. When the axial motion is generated by a given power, the orbiting scroll moves through the eccentric shaft, and the air between the orbiting scroll and the fixed scroll moves to the center to be.

Unlike the general compressor and turbine types, the scroll rotator has a spiral-shaped flow path formed on two disks, and the compression and expansion process is realized by the parallel movement of the orbiting scroll, so that the structure is very simple and easy to manufacture.

For example, in Patent Publication No. 10-0842301 (registered on June 24, 2008), the axial force obtained from the scroll expander is transmitted to the orbiting scroll of the inflator and the orbiting scroll of the scroll compressor directly connected by the power transmitting means, Compressor to eliminate the process of converting the mechanical energy obtained from the expander into the electrical energy through the generator so as to combine the advantages of the scroll compressor and the expander to enhance energy transfer efficiency and simplify the structure.

FIG. 1 is a cross-sectional view of an integrated inflator-compressor according to the present invention. FIG. 1 shows a sectional structure of the inflator-compressor according to the present invention. The housing 90 includes an inflator 10 installed at one side of the housing 90, A power transmission means 60 for interlocking the orbiting scroll 21 of the inflator 10 and the orbiting scroll 41 of the compressor 30 and the power transmission means 60 for interlocking the movement of the orbiting scroll 41 of the inflator 10, And a separating plate 50 which is positioned between the orbiting scroll end plate 22 and the orbiting scroll end plate 42 of the compressor 30 and fixed within the housing 90.

The integral inflator-compressor having this structure directly transmits the power of the inflator 10 to the compressor 30 and the center of gravity of the two orbiting scrolls 21 and 41 of the inflator 10 and the compressor 30 becomes the center of revolution And the centrifugal forces generated in the two orbiting scrolls 21 and 41 are offset from each other. At least three power transmission means are provided so that the orbits of the orbiting scroll 21 and 41 Means for preventing rotation are provided.

On the other hand, the patent discloses that the power generated by the inflator 10 is transmitted to the compressor 30 through the rotary shaft, and the inflow air is supplementarily pressurized without additional power consumption. In addition, the air introduced into the scroll compressor passes through the primary compression process and then moves to the main compressor. In the main compressor, the air is pressurized to a pressure suitable for the application, and the utilized air passes through the scroll expander, After power is generated, it is discharged outside the machine.

In this process, a part of the power required for compressing the main compressor is saved by the auxiliary scroll compressor, thereby increasing the efficiency of the entire system. In addition, since the scroll compressor / inflator according to the present invention is an integrated scroll compressor / inflator, it has an advantage in that it has higher performance reliability and smaller size than other energy recovery devices.

When the orbiting scroll of the compressor / inflator is coupled by a shaft, the orbiting scroll of the inflator and the orbiting scroll of the compressor are combined with each other, You can configure the system you want by turning it together.

However, in such a system, it is necessary to apply energy to the air discharged from the scroll compressor by using a main compressor or a heat exchanger.

That is, it has utility value as a device that recovers energy rather than a device that generates power, and in order to generate power, an additional energy source must be configured in the system.

In addition, the air entering the inflator in this device is generally higher in temperature than the air entering the compressor. Therefore, when the space between the inflator and the compressor is arranged opposite to each other as in the above-mentioned patent, the heat of the inflator is transferred to the compressor to heat the air in the compressor, and the temperature of the air flowing into the main compressor . The temperature rise of the incoming air degrades the efficiency of the compressor, so that the efficiency of the overall system may be reduced if hot air is introduced into the expander of the integral scroll compressor / expander.

The present invention is to provide a scroll turbine system that can be utilized as a small power device with low vibration and high efficiency by simple structure and simple driving method by using the scroll compressor and the scroll expander.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a scroll turbine system comprising: a scroll compressor including a first fixed scroll and a first orbiting scroll having eccentric rotation driving with respect to the first fixed scroll; A scroll inflator provided with a second fixed scroll and a second orbiting scroll having an eccentric rotation drive with respect to the second fixed scroll and rotating the second orbiting scroll with a suction gas; A heating unit for heating the gas discharged from the scroll compressor to a high temperature and supplying the heated gas to the suction gas of the scroll expander; And a power transmitting portion for transmitting rotational driving force of the second orbiting scroll to the first orbiting scroll and driving the first orbiting scroll to rotate.

Preferably, in the present invention, the warming portion is a heat exchanger in which heat is exchanged with a combustor or a high-temperature heat source.

Preferably, in the present invention, the power transmitting portion is characterized in that a rotational driving force of the second orbiting scroll is transmitted by a chain, a belt, or a group of teeth to which the teeth are coupled.

Preferably, in the present invention, the second orbiting scroll is connected to a generator.

A scroll turbine system according to the present invention includes a scroll compressor for compressing and discharging intake air, a warming portion for heating the high-pressure air discharged from the scroll compressor to a high temperature, and a high-temperature / high- And a power transmission unit for transmitting a part of the shaft power generated by the scroll expander to the scroll compressor. The generator is connected to the generator to generate electric energy or is combined with mechanical load in various forms to generate power as a power source And can be applied in various forms.

In addition, since the scroll turbine system of the present invention converts high-temperature / high-pressure air instead of high-speed rotation into rotary motion, strong driving force can be obtained and it can be utilized as a very small power source depending on the size of components.

1 is a cross-sectional structural view of an integrated scroll compressor-inflator according to the prior art,
2 is a cross-sectional structural view of a scroll turbine system according to the present invention.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as the first component.

Whenever an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that other elements may be present in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

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

2, the present invention includes a scroll compressor 110 for compressing and exhausting air sucked from the outside, a scroll expander 120 for rotating the orbiting scroll by intake air, A warming unit 130 for increasing the temperature of the air to a high temperature and a power transmission unit for transmitting the rotational driving force generated by the scroll expander 120 to the scroll compressor 110.

The scroll compressor 110 has a first fixed scroll 111 and a first orbiting scroll 112 that is eccentrically rotated with respect to the first fixed scroll 111. The first orbiting scroll 112 has a first scroll 112, And the first gear 112b is rotated by the eccentric shaft 112a.

A suction port 111a is formed on the outer side of the first fixed scroll 111 to receive the outside air and a discharge port 111b is formed in the center to discharge the compressed air compressed by the scroll compressor 110. [

The first orbiting scroll 112 is assembled to enable the eccentric rotation driving with the first fixed scroll 111. The air sucked into the intake port 111a flows through the first fixed scroll 111 111 and the first orbiting scroll 112 are engaged with each other and compressed in the compression space formed by both scrolls and exhausted through the discharge port 111b.

The scroll inflator 120 has a second fixed scroll 121 and a second orbiting scroll 122 having an eccentric rotation drive with respect to the second fixed scroll 121. The second orbiting scroll 122 has a second fixed scroll 121, And the second gear 122b is rotated by the eccentric shaft 122a.

A suction port 121a is formed at the center of the second fixed scroll 121 to allow air to flow in and a discharge port 121b to discharge the expanded air to the outside.

Accordingly, the air (high temperature / high pressure) introduced into the suction port 121a is expanded and the second orbiting scroll 122 is rotationally driven and discharged to the outside through the discharge port 121b.

Meanwhile, the rotational driving force generated in the second orbiting scroll 122 may be used as a power source in connection with various mechanical loads. In this embodiment, the generator 150 is connected to the second orbiting scroll 122, .

The warming unit 130 heats the gas discharged from the scroll compressor 110 to a high temperature and supplies the heated gas to the scroll expander 120. The warming unit 130 is a combustor for heating the air through a combustion process, Or by a heat exchanger in which heat is generated by heat exchange with a high-temperature heat source.

The power transmitting portion is for transmitting the rotational driving force generated by the scroll expander 120 to the scroll compressor 110. In this embodiment, the second gear 122b of the second orbiting scroll 122 and the first orbiting scroll The rotational driving force is transmitted by the bevel gears 141 and 142 that are engaged with the first gear 112b of the first and second gears 112 and 112.

Meanwhile, in the present invention, the power transmitting portion may be provided in various forms, for example, the first orbiting scroll and the second scroll may be provided by various gears that are coupled to a chain, a belt, or a tooth, And may be implemented in various forms depending on the design situation and the use of the turbine system.

An operation example of the scroll turbine system constructed as above will be described as follows.

When air is introduced from the outside into the suction port 111a of the scroll compressor 110, the suction air is compressed by eccentric rotation between the first fixed scroll 111 and the first orbiting scroll 112, The high pressure air is heated to a high temperature in the warming section 130 and is supplied to the inlet 121a of the scroll expander 120 with high temperature / high pressure air.

Due to the high enthalpy of the high-temperature / high-pressure air, the air introduced into the scroll expander 120 rotates and drives the second orbiting scroll 122 and is exhausted to the outside through the discharge port 121b.

On the other hand, the driving force generated by the scroll inflator 120 drives the generator 150 connected to the center shaft of the second gear 122b through the eccentric shaft 122a to produce electricity. At this time, the generator 150 may be replaced with another mechanical load if necessary and used as a power source.

On the other hand, a part of the rotational driving force of the second gear 122b causes the first gear 112b to rotate through the bevel gears 141 and 142. By the rotational driving force of the first gear 112b, The first orbiting scroll 112 of the scroll compressor 110 rotates and compresses the intake air flowing into the intake port 111a of the scroll compressor 110 to a high pressure.

In the turbine system of the present invention, the first orbiting scroll (112) may be disadvantageous to the initial start-up by being coupled with the second orbiting scroll (122) Sufficient compression may not be performed on the air flowing through the inlet port 111a of the valve body 111a. However, such a drop in initial efficiency can be alleviated by the high-temperature air generated in the warming unit 130, once the shaking force is generated in the scroll expander 120. In the initial operation of the turbine system, a starter motor (not shown) may be added to the first gear 112b to selectively provide an initial maneuvering force for the initial start of the first orbiting scroll 112, Only the initial maneuvering force is provided to the first orbiting scroll 112 and can be separated from the turbine system after normal operation is performed.

The turbine system according to the present invention can be applied to various types of mechanical loads in combination with a power source. In particular, the turbine system of the present invention can be easily applied in various forms, It is possible to obtain a strong driving force and to use it as a very small power source depending on the size of the component.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

110: scroll compressor 111: first fixed scroll
112: first orbiting scroll 120: scroll expander
121: second fixed scroll 122: second orbiting scroll
130: heating zone 141, 142: bevel gear
150: generator

Claims (4)

A scroll compressor provided with a first fixed scroll and a first orbiting scroll having eccentric rotation driving with respect to the first fixed scroll to compress and discharge the suction gas;
A scroll inflator provided with a second fixed scroll and a second orbiting scroll having an eccentric rotation drive with respect to the second fixed scroll and rotating the second orbiting scroll with a suction gas;
A heating unit for heating the gas discharged from the scroll compressor to a high temperature and supplying the heated gas to the suction gas of the scroll expander;
A power transmission unit for transmitting rotational driving force of the second orbiting scroll to the first orbiting scroll and driving the first orbiting scroll to rotate;
And a starter motor selectively connected to the first orbiting scroll to provide an initial maneuvering force. 2. The scroll turbine system according to claim 1, wherein the warming portion is a heat exchanger for performing heat exchange with a combustor or a high-temperature heat source. 2. The scroll turbine system according to claim 1, wherein the power transmitting portion is transmitted with a rotational driving force of the second orbiting scroll by a chain, a belt, or a gear group to which the teeth are coupled. 2. The scroll turbine system of claim 1, wherein the second orbiting scroll is connected to a generator.

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