JP2002202077A - Compressor and gas compressing system for gas turbine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor of simple structure and good cooling efficiency. SOLUTION: A gas supply opening 36a makes cooling gas flow on a wall surface. A drive shaft housing 3 provided with a part rotatably and airtightly retaining a rotation drive shaft 16 extended from an outside on the bottom surface, and a compression chamber housing 2 forming a gas compression chamber inside, are airtightly jointed with facing recess part openings each others. A suction opening 11b communicated with the gas compression chamber and sucking the cooling gas, and a swing member 11 having plural cooling fins 34 extending in a direction from the gas supply opening 36a toward the suction opening 11b are arranged in such a manner that gas in the gas compression chamber can be compressed to form a cooling space between the gas supply opening 36a and the suction opening 11b. Gas after cooling members in the cooling space is taken in through the suction opening 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor for taking in and compressing a gas to be compressed after cooling a compression mechanism, and compressing the gas to be compressed after cooling the compression mechanism with the gas to be compressed before compression. The present invention relates to a gas compression system for a gas turbine supplied to a gas turbine.

[0002]

2. Description of the Related Art Conventionally, in a scroll fluid machine, it is possible to increase the compression ratio more than usual by increasing the number of turns of a scroll wrap. However, when the compression ratio is made larger than usual, not only the structure becomes larger, but also the life of bearings and seal members is reduced due to higher heat generated by the compression of the fluid.

The scroll fluid mechanism takes in the fluid from the outer peripheral side of the orbiting scroll end plate, reduces the compression space in which the fluid is taken in toward the center side, compresses the fluid, and discharges the fluid from the central outlet. It is necessary to efficiently cool the central portion.

[0004] For this purpose, various cooling devices have been proposed. The technique described in Japanese Patent Laid-Open No. 1-193091 is one of them. According to this conventional technology, the fixed scroll is surrounded by the compressor body with the wrap surface of the fixed scroll inside, and a rotating shaft extending from the outside of the compressor body can be rotated by a rotating shaft bearing provided in the compressor body. The orbiting scroll having a wrap that meshes with the wrap of the fixed scroll is disposed so as to be able to revolve through the orbiting shaft bearing by the orbiting shaft at the tip of the rotating shaft, and the rotating shaft bearing circulates cooling water. After cooling, the fixed scroll is provided with a circulation passage therein and cooled by cooling water, then compressed in a compression chamber and discharged together with the compressed fluid, and the orbiting shaft bearing introduces air into the compressor body to cool the cooling. Is used to take in the air used in the compression chamber, compress the air in the compression chamber, and discharge the compressed air.

[0005]

In the prior art, a passage for allowing cooling water to flow through the end plate of the fixed scroll must be cut in order to cool the fixed scroll. In addition, a water cooling path must be provided for cooling the rotating shaft bearing, which complicates the configuration and increases the size. In addition, since air is introduced from the outside to the upper side defined by the upper surface of the orbiting scroll and the partition plate, the upper surface of the orbiting scroll end plate cannot be directly cooled, and the orbiting of the orbiting scroll that rises upward from the partition plate. Since the orbiting scroll is cooled by cooling the shaft bearing, it is necessary to increase the cooling efficiency by enlarging the surrounding orbiting scroll portion that holds the orbiting shaft bearing, which increases the size and weight. In order to cool the revolving shaft bearing, air taken into the compression chamber is used, and the rotating shaft bearing and the fixed scroll are cooled by water cooling, so that the configuration is complicated.

[0006] Fluid machines having a compression mechanism are used in various fields, but when they are used for air compressors, fuel compressors, and the like for turbines, it is necessary to determine where to obtain the drive sources for these compressors. It is a problem. As is conventionally known, when the turbine rotating shaft and the compressor rotating shaft are integrated on the same rotating shaft, when the turbine is started by the starter and the rated rotation speed of the turbine is reached after reaching the rated speed, It is necessary to set each compressor to supply the amount of air and fuel corresponding to the number of revolutions, which limits the degree of freedom of design, and cannot use other compressors. Could not.

In view of the above-mentioned circumstances, an object of the present invention is to provide a compressor having a cooling structure having a simple structure for cooling by gas without having a water-cooling or liquid-cooling structure and having excellent cooling efficiency. It is another object of the present invention to provide a gas compression system for a gas turbine using a compressor having a simple structure for cooling by gas without having a water-cooling or liquid-cooling structure and having excellent cooling efficiency. Another object of the present invention is to provide a gas compression system for a gas turbine, which has a simple configuration and excellent cooling efficiency, and does not require the turbine and the compressor to be integrally designed.

[0008]

According to a first aspect of the present invention, there is provided a compressor for receiving and compressing a gas to be compressed after passing the gas through a radiator provided in the compression mechanism. An inflow port for inflow of the compressed gas, a drive shaft bearing for driving the compression chamber on the rear surface of the compression chamber, and a swinging member provided with a suction port for the compressed gas are provided, between the inlet and the suction port. The suction passage is formed to be airtight from the outside, and is configured to cool the compression mechanism via the heat radiating portion provided between the suction passages without having a water cooling or liquid cooling structure.

A first feature of the present invention is that an inflow port through which a gas to be compressed flows, a drive shaft bearing for driving the compression chamber, and a suction port for the gas to be compressed are provided on the rear surface of the compression chamber. The swinging member provided is provided, and a suction passage is formed between the inflow port and the suction port so as to be airtight with the outside.

Therefore, the gas for cooling the compressor can flow into the suction passage, but the gas in this space does not leak to the outside. Even if a gas harmful to the human body, a gas containing a harmful substance, a combustible gas, or the like flows from the inflow port, the gas does not leak from the space to the outside of the compressor.

[0011] A second feature of the present invention is that the compression mechanism is cooled through the heat radiating portion provided between the suction passages. The inside of the compression mechanism can be cooled with a simple configuration without having a water-cooled or liquid-cooled structure. That is, the gas introduced from the inflow port cools the radiating portion, thereby cooling the heated swinging member and the rotary drive shaft. At this time, the radiating portion is provided on the swinging member. Therefore, the rocking member collides with the cooling gas during the compression action of the swinging member, and the cooling effect is improved. Then, the cooling gas is discharged from the suction port to the compression chamber without leaking to the outside.

The oscillating member extends on the surface opposite to the surface on which the fluid compression member for compressing the fluid in the fluid compression chamber is provided, in a direction from the inflow port to the discharge port. Preferably, a number of cooling fins are provided, and the fin surface is formed in a wavy shape along the direction. With such a shape, when the swinging member swings due to the compressing action, the corrugated surface collides with the cooling fluid and disturbs the cooling gas, so that the cooling effect can be further enhanced.

According to a second aspect of the present invention, there is provided a compressor comprising a fixed scroll and a orbiting scroll, wherein the compressor takes in and compresses the gas after the gas to be compressed has passed through the heat radiating portion on the surface of the orbiting scroll. An orifice for inflowing the compressed gas into the compression mechanism, and a orbiting scroll, and a orbiting drive shaft bearing for orbiting the orbiting scroll wrap on a surface opposite to the orbiting scroll wrap side, The compressed gas suction port is provided, and a suction passage is formed between the suction port and the suction port so as to be airtight with respect to the outside.Water cooling, through the radiator provided between the suction passages without having a liquid cooling structure. To cool the compression mechanism.

According to a second aspect of the present invention, the compression mechanism according to the first aspect of the present invention comprises a fixed scroll and an orbiting scroll. Therefore, the first feature of the present invention is that the orbiting scroll and the orbiting scroll wrap are driven in the direction opposite to the orbiting scroll wrap side by providing the inflow port for inflow of the compressed gas and the orbiting scroll in the compression mechanism. The point is that a drive shaft bearing and the compressed gas suction port are provided, and a suction passage is formed between the inlet and the suction port so as to be airtight with the outside. Cooling gas can flow into the suction passage, but the gas in this space does not leak to the outside. Even if a gas harmful to the human body, a gas containing a harmful substance, a combustible gas, or the like flows from the inflow port, the gas does not leak from the space to the outside of the compressor.

A second feature of the present invention is that the compression mechanism is cooled through the heat radiating portion provided between the suction passages. The inside of the compression mechanism can be cooled with a simple configuration without having a water-cooled or liquid-cooled structure. In other words, the gas introduced from the inflow port cools the heated orbiting scroll and the orbiting drive shaft bearing by cooling the radiating portion, and at this time, the radiating portion is provided in the orbiting scroll. Therefore, the orbiting scroll collides with the cooling gas during the compression action, and the cooling effect is improved. The cooling gas is discharged from the suction port into the compression chamber without leaking to the outside.

Further, between the suction passage, a bearing for holding the rotary drive shaft and a bearing for holding a crankshaft for limiting the swinging amount of the orbiting scroll are arranged. It is an effective means. According to this technical means, the heat generated by the crank bearing can be cooled.

It is also an effective means of the present invention that a plurality of cooling fins extending from the inflow port toward the suction port are implanted in the compression mechanism together with the rotary drive shaft bearing. is there. According to such technical means, the bearing holding the rotary drive shaft can be further cooled, and the inside of the cooling space can be further cooled.

It is also an effective means of the present invention to dispose a cooling fan on the rotary drive shaft outside the compression mechanism to forcibly cool the cooling space from outside. According to such a technical means, the compression mechanism can be further cooled and the inside of the suction passage can be further cooled.

It is also an effective means of the present invention to dispose a number of cooling fins on the surface of the fixed scroll opposite to the wrap surface to cool the fixed scroll from outside. According to such technical means, the heat generated by the compression can be further cooled.

These cooling means, that is, a number of cooling fins in the compression mechanism, a cooling fan provided on the rotary drive shaft outside the compression mechanism, and a number of cooling fins on the surface of the fixed scroll opposite to the wrap surface. By appropriately combining the cooling fins and the like, the heat generated by the compression can be further cooled, and the durability of the compressor can be improved.

According to a third aspect of the present invention, there is provided a gas compression system for a gas turbine, wherein the compressed gas is passed through a heat radiating portion provided in a compression mechanism, the gas is taken in, compressed and supplied to a gas turbine. In the compression mechanism, an inflow port for inflow of the compressed gas, a drive shaft bearing for driving the compression chamber on the rear surface of the compression chamber, and a swinging member provided with a suction port for the compressed gas are provided, A suction passage is formed between the inlet and the suction opening so as to be airtight with the outside, and the gas that cools the compression mechanism through the heat radiating portion provided between the suction passages without having a water-cooling or liquid-cooling structure is sucked into the suction passage. The compression mechanism is configured to be taken in through a port, and the compressed gas compressed by the compression mechanism is configured to be supplied to a combustion chamber.

According to the present invention, the present invention provides a swinging member provided with an inflow port through which gas flows in, a rotary drive shaft bearing for driving the compression chamber on the rear surface of the compression chamber, and a suction port for the compressed gas. Since a suction passage is formed between the inflow port and the suction port so as to be airtight with the outside, cooling gas can flow into the passage, but the gas in this passage does not leak to the outside. . Therefore, even if a gas harmful to the human body, a gas containing a harmful substance, a fuel gas, or the like flows through the inlet, it does not leak from the space to the outside of the compressor.

Further, the present invention is arranged such that the gas having cooled the compression mechanism is taken in through the suction port through the heat radiating portion provided between the suction passages without having a water cooling or liquid cooling structure. Since the compression mechanism is configured to supply the compressed gas compressed by the compression mechanism to the combustion chamber, the gas introduced from the inflow port cools the heat radiating section, so that the rocking member and Various members such as a connection portion connected to the rotary drive shaft can be cooled, and this gas is discharged from the discharge port to the compression chamber without leaking to the outside.

As described above, the compression mechanism used in the third aspect of the present invention allows the gas to flow through the suction passage formed airtight with the outside,
Since the heat radiating portion provided on the swinging member swings in the suction passage, the cooling effect is high. After the cooling, the gas is compressed by the compression chamber and supplied from the compression mechanism to the fuel chamber. Durability is high, and the gas after cooling does not leak to the outside of the compression mechanism before compression, and it can be used as an air compressor as a gas compression system for turbines and also as a fuel compressor. A gas compression system for a turbine with excellent safety can be provided.

It is also an effective means of the third invention that the rotary drive shaft of the compression mechanism is rotated by a drive source different from the drive source of the gas turbine. According to such technical means, it is possible to supply an air amount and a fuel amount corresponding to a predetermined rated rotation speed of the turbine by using another compressor without designing the whole of the turbine and the compressor dedicated to the turbine. The compressor can be operated.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Not just.

FIG. 1 is a sectional view of a scroll compressor body according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line CC of FIG. 4 is a detailed view of a main part of FIG. 1, FIG. 5 is a perspective view of a fixed scroll housing,
FIG. 6 is a perspective view of the orbiting scroll, FIG. 7 is an explanatory diagram illustrating a gas compression state when gas is taken in from one side wall of the orbiting scroll wrap, and FIG. FIG. 9 is an explanatory diagram for explaining a gas compression state when the gas is taken in, and FIG. 9 is a schematic configuration diagram of a gas turbine.

In FIG. 1, the scroll compressor body 1
Are a fixed scroll housing 2 to which a housing cover 4 is attached, a drive shaft housing 3 to which the fixed scroll housing 2 is attached, and a fan cover 5 of a fan 25 fixed to a rotary drive shaft 16 connected to a rotary drive source (not shown). It is composed of A cooling chamber 24 is provided between a discharge pipe 6 attached to a discharge port of a front compression section of the fixed scroll housing 2 to be described later and a suction pipe 7 attached to a suction port of a rear compression section. The cooling chamber 24, the discharge pipe 6, and the suction pipe 7 are connected by a pipe to form an intermediate path.

The intermediate path has a total volume of a front-stage discharge port 2e and a rear-stage suction port 2f shown in FIG. 5, and a pipe passing through the cooling chamber 24 interposed therebetween. It is set to N (an integer of 2 or more) times the final compression chamber volume of the compression section. Then, after N times of discharge from the final compression chamber of the first-stage compression section, the first-stage capture of the second-stage compression section is configured to be captured by a volume equal to the final compression chamber volume of the first-stage compression section.

The drive shaft housing 3 comprises an upper surrounding body 30a formed in a circular tray shape and a cylindrical lower surrounding body 30b extending from the center of the bottom of the surrounding body. Is provided with a gas supply 36. The gas supply device 36 has a gas intake port 36b and a gas supply port 36a, and has a filter for filtering the gas sucked therein. The gas supply port 36a communicates with the gas supply port 36a through a passage 3b in the drive shaft housing 3. Thus, gas can be supplied into the drive shaft housing 3. Note that the gas supply unit 36 may take in the cooled gas from the intake port 36b, or may have a built-in cooler.

An end (not shown) of the rotary drive shaft 16 rotatably disposed and held inside the lower surrounding body 30b has an eccentric shaft portion 16a (see FIG. 4) which is eccentric to the axis center line 16b of the rotary drive shaft 16 by a distance n. 4), the orbiting scroll 11 which moves up and down in FIG. 1 by rotating the eccentric shaft portion 16a about the shaft center line 16b oscillates, compresses the taken-in gas and causes the discharged gas from the discharge pipe 8 to move. It is configured to be able to exhaust to the outside.

On the other hand, the fixed scroll housing 2 is shown in FIG.
As shown in the figure, mounting portions 2i, 2j, and 2k are provided at three locations on the outer peripheral surface in the circumferential direction, which are connected to the drive shaft housing 3 described above. The concave portion to be formed is provided with a mirror surface 2c,
A groove is provided on the coupling surface 2m outside the portion coupled with the drive shaft housing 3, and a groove is provided inside the groove, and a self-lubricating dust seal 14 such as a fluorine resin is disposed in the groove. Then, the upper surface 12 at the left end of the lap groove 27
A groove 47 inclined from the upper surface 12 is provided between the dust seal 14 and the chip seal 13 disposed in the first and second positions.

Land portion 9 of fixed scroll housing 2
a is a front-stage discharge port 2 connected to the discharge pipe 6 shown in FIG.
e, and a rear-stage suction port 2f connected to the suction pipe 7, and a fixed scroll wrap 9 forming a front-stage compression portion in a counterclockwise direction from a land portion 9a in which these holes are formed.
b, a fixed scroll wrap 9c forming a rear compression section in a clockwise direction is spirally implanted. And
A groove is provided at the top of the lap at the upper end of the lap, and a chip seal 13 having a self-lubricating property such as a fluoro resin is fitted into the groove.

As shown in FIG. 1, a cooling fin 2b is implanted on the rear side of the mirror surface 2c of the fixed scroll housing 2, and a housing cover 4 is mounted on the top of the cooling fin 2b to form a cooling passage 2n. ing. Therefore, the fixed scroll can be cooled by cooling air that is blown by a blowing means (not shown) and flows in a direction penetrating the paper surface of FIG. 1.

As shown in FIG. 6, the orbiting scroll 11 has a mirror surface 11c, and the mirror surface 11c comes in contact with the dust seal 14 provided on the coupling surface of the fixed scroll housing 2 as shown in FIG. The mirror surface 11c has an orbiting scroll wrap 10a that constitutes a front compression part implanted outside and a orbiting scroll wrap 10b that constitutes a rear compression part implanted on the center side. A suction port 11b is opened at a position close to the outer end 10c of the orbiting scroll wrap 10a and facing the groove 47 in FIG. Grooves are provided at the tops of these wraps, and a self-lubricating chip seal 13 such as a fluorine resin is fitted into the grooves. The orbiting scroll wraps 10a and 10b are arranged such that the wall surfaces thereof face the fixed scroll wraps 9b and 9c.

As shown in FIG. 1, a cooling fin 34 having a corrugated wall is implanted on the back side of the mirror surface 11c, and an auxiliary cover 15 is attached to the top of the cooling fin 34.
A cooling passage 11n (FIG. 3) is formed. Therefore, FIG.
The lower side of the orbiting scroll is cooled by the gas flowing downward from the gas supply device 36 as shown by the arrow 48, and the cooled gas is supplied to the closed chamber by the scroll wrap through the suction port 11b.

As shown in FIG. 4, the auxiliary cover 15 has mounting portions 15d (plurality) attached to the land portions 11d (plurality) of the cooling fins 34 of the orbiting scroll. A bearing 18 in which an eccentric shaft portion 16 a eccentric to the tip of the rotation drive shaft 16 is rotatably fitted on the center side of the auxiliary cover 15, and the rotating seal 9 prevents the bearing 18 from leaking grease. A bearing 19 that receives a crank member for preventing rotation of the orbiting scroll is disposed at three places in the circumferential direction on the outer peripheral side, and the rotating seal 26 prevents the bearing 19 from leaking grease. This crank member is constituted by a shaft 22 fitted on one surface of the plate member 21 with the bearing 19 and a shaft 23 having an eccentric shaft position on the other surface. The rotary seal 2 is positioned by fitting with a bearing 20 provided on the drive shaft housing 3.
6, the bearing 19 is configured to prevent grease from leaking. Therefore, the eccentric shaft portion 16 of the rotary drive shaft 16
By the eccentric rotation of a, the orbiting scroll 11 is configured to be able to revolve with respect to the fixed scroll.

Bearings 17 and 38 are disposed in the lower surrounding portion 30 b of the drive shaft housing 3,
Is rotatably held. The rotary seal 29 is configured to prevent grease from leaking from the bearing 17 to the orbiting scroll 11 side.

As shown in FIG. 2, the drive shaft housing 3 has a large number of cooling fins 35 implanted in the upper surrounding portion 30a from the upper side to the lower side. , 38, 20 and so on can be cooled.

As shown in FIG. 1, a cooling fan 25 is provided on the rotary drive shaft 16, and the rotation of the rotary drive shaft 16 causes the cooling fan 25 to rotate. , And cools the outer surface of the lower surrounding portion 30b and the back surface of the upper surrounding portion 30a, flows around the neck 3d, and flows out from the cover cover opening 46a to the outside.

The scroll body 1 constructed as described above
Starts the drive by rotating the rotary drive shaft 16 by a drive source (not shown). At the time of the initial operation, the scroll compressor is in a stopped state, and the gas compression formed by the fixed scroll wrap and the orbiting scroll wrap is performed. In the final compression chamber of the rear compression section of the space, fluid exists at a pressure equal to or lower than the external pressure of the discharge port 2d (FIG. 1) of the rear compression section. Since the compressed gas communicates with the intermediate path, the pressure may drop to the intake pressure of the pre-stage compression section.

In this state, when the initial operation is started, the residual gas in the subsequent compression section is compressed until it becomes higher than the external pressure. That is, when the pressure of the final compression chamber of the subsequent compression unit is combined with the compressed gas of the compression chamber before it and becomes higher than the external pressure, it is discharged to the outside. The fluid is taken in and is combined with the gas on the discharge port side and compressed. Then, at the end of the initial operation, after the N times of discharge from the last compression chamber of the first-stage compression section, the first-stage intake of the second-stage compression section is taken in by a volume equal to the final compression chamber volume of the first-stage compression section. Operating state.

The scroll main body 1 constructed as described above
As shown in FIG. 1, the rotation of the rotation drive shaft 16
When the eccentric shaft portion 16a rotates about the shaft center line 16b, the orbiting scroll 11 revolves, and the orbiting scroll 1
The compressed gas inhaled from the suction port 11b of the first scroll is taken in by the wrap 10a of the orbiting scroll, and the closed space S ₁ (FIG. 7) and T ₁ (FIG. 8) formed by the wrap and the fixed scroll wrap 9b. It is captured.
These approach spaces are taken up by 180 ° and approximately equal volumes.

This closed space is as shown in FIGS.
, Then S₁→ S₂→ S₃→ S₄→ S ₅And S₅
To the front discharge port 2e → intermediate path → back suction port 2f → S₆
→ S₇→ S₈→ S₉And T in FIG.₁As
The enclosed space taken in is T ₁→ T₂→ T₃→ T₄When
Compress and T₄To the front discharge port 2e → intermediate route → rear suction
Mouth 2f → T₅→ T₆→ T₇→ T₈→ T₉And compressed inside
Sent to the center, S₉And T ₉Merges out of the outlet 2d
It is discharged from the pipe 8. In addition, as shown in FIG.
Interval S₈And T₉Have equal volumes.

Next, the cooling operation of the multi-stage scroll compressor body 1 configured as described above will be described. In FIG. 1, the gas supply device 36 operates in synchronization with the rotation of the rotary drive shaft 16, and the fluid is supplied into the drive shaft housing 3 from the passage 3b. The supplied gas contacts a number of cooling fins 35 in the drive shaft housing 3 as shown in FIG. 2 to cool the drive shaft housing 3 heated by a bearing or the like, thereby cooling the bearing and causing the bearing to cool. Prevents early deterioration of the grease used.

The supplied gas comes into contact with a number of wall-shaped corrugated cooling fins 34 implanted on the back of the orbiting scroll 11, as shown in FIG. The orbiting scroll 11 and the auxiliary cover 15 that are heated by the high heat generated as the space is sequentially reduced are cooled. At this time, the cooling fins 34 swing due to the revolution of the orbiting scroll 11, and the gas collides with the wall surface of the orbiting scroll 11, so that a further cooling effect is obtained. Therefore, it is possible to prevent early deterioration of the tip seal, the bearing, and the like used in the scroll compressor.

The fluid that has cooled the inside of the drive shaft housing 3 is:
Since the periphery of the orbiting scroll wrap becomes negative pressure than the inside of the drive shaft housing 3 due to the intake of gas by the wrap,
It flows into the suction port 11b of the orbiting scroll 11. The gas taken in by the orbiting scroll wrap 10 is sequentially compressed by the closed space formed by the fixed scroll wrap, and is cooled by the cooling chamber 24 through the discharge pipe 6 from the front discharge port 2e of the front compression section, and is cooled. The gas that has flowed through the suction pipe 7 flows into the rear compression section from the rear suction port 2f, is compressed again, and is discharged from the discharge port 2d.

As described above, in the compressor according to the present embodiment, the gas for cooling the compression mechanism is taken into the closed chamber of the compression mechanism. The gas can flow in one direction without using a special blower such as a fan. Also, the back surface of the fixed scroll housing is cooled by a gas passage formed by a number of fins,
A drive shaft that introduces the cooling gas into the drive shaft housing, cools the orbiting scroll and various bearings by providing a number of fins on the back surface of the orbiting scroll, and drives the orbiting scroll on the outer surface of the drive shaft housing. , The compression mechanism can be efficiently cooled.

Further, since the gas to be compressed is introduced into the closed compression mechanism to cool the compression mechanism, the gas is compressed and discharged to the outside of the compression mechanism. Therefore, the discharged gas is isolated through the discharge pipe. By being transported to the chamber, it does not leak out of the compression mechanism. Therefore, the gas introduced into the machine may be used as air to the fuel chamber of the gas turbine, as a fuel gas, or even when the compression mechanism of the present embodiment is used for vacuuming used in the semiconductor manufacturing process. No harmful gas leaks out of the aircraft.

Next, a case where the compressor according to the present embodiment is applied to a gas turbine will be described with reference to FIG. In the figure, a gas turbine power supply system 60 includes a fuel compression system 59 composed of a fuel compressor 30A and a driving force control device 50A for controlling the driving force of the fuel compressor 30A, an air compressor 30B, The air compressor system 58 includes a driving force control device 50B that controls the driving force of the air compressor 30B, a combustion chamber 31 that burns fuel, and a gas turbine 32.

The fuel compressor 30A and the air compressor 30B
The above-mentioned scroll compressor body 1 is used. The drive control devices 50A and 50B for driving and controlling these compressors include a motor for driving these compressors and an inverter for controlling the motors, and the two are connected by a signal line so as to be able to operate synchronously. I have.

The power supply system 6 configured as described above
0 is a drive control device 50A, 50B
This drives the fuel compressor 30A and the air compressor 30B. The fuel compressed by the fuel compressor 30A is burned after being mixed with the air compressed by the air compressor 30B in the combustion chamber 31. The mixed gas expands due to this combustion, and the expansion force rotates the impeller in the gas turbine chamber, whereby the rotating shaft 32a rotates, and work is performed by the rotation force.

[0053]

As described above, according to the present invention, the cooling space for cooling the compression mechanism is formed airtight with the outside.
Even if a gas harmful to the human body, a gas containing harmful substances, or a combustible gas flows in from the inflow port, it does not leak out of the space to the outside of the compressor. Further, when the gas introduced from the inflow port cools a number of cooling fins provided on the swinging member that performs a compression action, the swinging of the swinging member causes the cooling fins to collide with the cooling gas, The cooling effect is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a scroll compressor according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line CC of FIG. 1;

FIG. 4 is a detailed view of a main part of FIG. 1;

FIG. 5 is a perspective view of a fixed scroll housing.

FIG. 6 is a perspective view of the orbiting scroll.

FIG. 7 is an explanatory diagram illustrating a gas compression state when gas is taken in from one side wall surface of the orbiting scroll wrap.

FIG. 8 is an explanatory diagram illustrating a gas compression state when gas is taken in from the other side wall surface of the orbiting scroll wrap.

FIG. 9 is a schematic configuration diagram of a gas turbine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Scroll compressor main body 2 Fixed scroll housing (compression chamber housing) 3 Drive shaft housing 11 Orbiting scroll (oscillating member) 16 Rotary drive shaft (orbiting scroll drive shaft) 24 Coolers 27 and 28 Fixed scroll wrap groove 34 Cooling fin

Claims (8)

[Claims] 1. A compressor for taking in and compressing a gas after a gas to be compressed passes through a heat radiating portion provided in a compression mechanism, comprising: an inlet through which the gas to be compressed flows into the compression mechanism; A drive shaft bearing for driving the compression chamber and a swinging member provided with a suction port for the compressed gas are provided on a rear surface of the compression chamber, and a suction passage is formed between the suction port and the suction port so as to be airtight with the outside. A compressor configured to cool the compression mechanism via the radiator provided between the suction passages without having a water-cooling or liquid-cooling structure. 2. A compressor comprising a fixed scroll and an orbiting scroll as a compression mechanism, wherein the compressor takes in and compresses the gas after the compressed gas has passed through a heat radiating portion on the surface of the orbiting scroll. An inlet through which the gas to be compressed flows,
A orbiting scroll is provided, and a orbiting drive shaft bearing portion for orbiting the orbiting scroll wrap is provided on a surface opposite to the orbiting scroll wrap side, and the compressed gas suction port is provided, and between the inflow port and the suction port. A compressor in which the suction passage is formed airtight with the outside, and the compression mechanism is cooled via the heat radiating portion provided between the suction passages without having a water-cooling or liquid-cooling structure. . 3. The compressor according to claim 2, wherein a bearing that holds a crankshaft that limits a swing amount of the orbiting scroll is provided between the suction passage and the drive shaft bearing. 4. A plurality of cooling fins extending in a direction from the inflow port to the discharge port together with a bearing for holding a rotary drive shaft for driving the turning drive shaft are implanted in the compression mechanism. The compressor according to claim 2, wherein: 5. The compressor according to claim 2, wherein a cooling fan is arranged on the rotary drive shaft outside the compression mechanism, and the suction passage is forcibly cooled from outside. 6. The compressor according to claim 2, wherein a plurality of cooling fins are provided on a surface of the fixed scroll opposite to the wrap surface to cool the fixed scroll from outside. 7. A gas compression system for a gas turbine, wherein the compressed gas is passed through a heat radiating section provided in the compression mechanism, the gas is taken in, compressed and supplied to a gas turbine. An inflow port through which the gas to be compressed flows, and a drive shaft bearing for driving the compression chamber on the rear surface of the compression chamber;
A swing member provided with a suction port for the compressed gas is provided, and a suction passage is formed between the suction port and the suction port so as to be airtight with the outside, and between the suction passage without having a water cooling or liquid cooling structure. The compression mechanism is configured to take in the gas that has cooled the compression mechanism through the heat radiation unit provided through the suction port, and the compressed gas compressed by the compression mechanism is supplied to a combustion chamber. A gas compression system for a gas turbine. 8. The gas compression system for a gas turbine according to claim 7, wherein a rotary drive shaft of the compression mechanism is rotated by a drive source different from a drive source of the gas turbine.