KR20140018416A - Turbocompressor - Google Patents

Abstract

A drive unit for driving the case 46, the centrifugal first and second stage compression units 5 and 6 provided on the case 46, and the first and second stage compression units 5 and 6; (1), the inside of the case 46 is a 1st cooling chamber 44 which accommodates the 1st heat exchanger 47, and sends the outside air compressed by the 1st stage compression part 5, and 2nd Lubricating oil sent to the drive unit 1 and the second cooling chamber 45 to receive the heat exchanger 48 and to receive the compressed air again by the second stage compressor 6 via the first cooling chamber 44. The oil tank 8 which accommodated this is divided into the windproof silencer chamber 60 which the unused air is sent through the 2nd cooling chamber 7, and the windproof silencer chamber 80 is the said case 46. It is located between the 1st cooling chamber and the 2nd cooling chambers 44 and 45 and the oil tank 60 in the inside.

Description

Turbo Compressor {TURBOCOMPRESSOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to turbocompressors used for power sources and processes in factories, and more particularly to turbocompressors equipped with wind silencers.

Patent Literature 1 proposes a two-stage turbo compressor that compresses and discharges a fluid compressed by a first stage compressor into a second stage compressor. This turbocompressor has a casing made of castings, and a first stage compressor and a second stage compressor are provided on the casing. The impeller of a 1st stage compressor and the impeller of a 2nd stage compressor are connected by the rotating shaft. The rotary shaft is disposed in parallel with the output shaft of the drive motor, and is rotated by the drive motor via the gear device at the center thereof.

In this turbo compressor, outside air is sucked from the suction port, and the outside air is compressed by the first stage compressor and sent to the first cooling chamber of the case. The first heat exchanger is accommodated in the first cooling chamber. The compressed air is cooled by the first heat exchanger, sent from the first cooling chamber to the second stage compressor, and compressed again. The air compressed by the second stage compressor is sent to the second cooling chamber of the case. The second heat exchanger is housed in the second cooling chamber. The compressed air is cooled by the second heat exchanger and discharged from the second cooling chamber via the discharge port.

In the turbocompressor described in Patent Document 1, the layout in the case is studied for miniaturization, and in the case, a first cooling chamber accommodating the first heat exchanger, a second cooling chamber accommodating the second heat exchanger, and lubricating oil The oil tank which accommodated this is arrange | positioned closely.

In a general centrifugal turbo compressor, when the compressed air becomes excess in a factory or the like, and the consumption amount of the compressed air decreases with respect to the amount of intake of outside air, the pressure at the outlet of the compressor increases. At this time, when the pressure value detected by the sensor provided at the outlet of the compressor exceeds the preset value, the windbreak valve provided at the outlet of the second cooling chamber is opened to release the compressed air to the outside air. . Moreover, in order to reduce the noise which arose by opening a windbreak valve, in such a compressor, a windbreak silencer is provided between the windbreak valve and the windshield to air | atmosphere.

Japanese Patent No. 3470410

By the way, the windshield silencer for a centrifugal turbo compressor as mentioned above must use a thing with a low pressure loss in order to prevent surging . Surging is a phenomenon in which backflow of air occurs in the impeller. When surging occurs, normal driving cannot be performed along with severe pulsation. Therefore, it is common to reduce noise and air by using a muffler with a small pressure loss, a duct bonded to a sound absorbing material, and the like in a windshield silencer. However, since the noise reduction effect increases with the size of the wind silencer, the centrifugal turbo compressor aimed at compacting has a problem in that wind noise cannot be sufficiently suppressed.

The present invention is proposed to solve the above-described problems, and includes a wind silencer, which can be installed in a narrow place, and further provides a turbo compressor capable of sufficiently reducing noise when releasing compressed air to the outside. It aims to do it.

In order to solve the above-mentioned problem and achieve the said objective, the turbo compressor which concerns on one Embodiment of this invention has the following structures.

[Configuration 1]

A case, a centrifugal first stage compression unit provided on the case, a centrifugal second stage compression unit provided on the case, a drive unit for driving the first stage compression unit and the second stage compression unit; The case includes: a first cooling chamber accommodating a first heat exchanger and sent outside air compressed by the first stage compression unit; and a second stage compression accommodating a second heat exchanger and passing through the first cooling chamber. And a second cooling chamber through which air compressed by the air is sent again, an oil tank containing lubricating oil sent to the driving unit, and a windproof silencer chamber through which the exhaust gas is discharged to the atmosphere through the second cooling chamber. The windproof silencer chamber accommodates the windproof silencer inside the case and is located between the first cooling chamber and the second cooling chamber and the oil tank.

[Configuration 2]

In the turbocompressor having the configuration 1, the case includes a partition plate that divides the interior into the first cooling chamber, the second cooling chamber, the oil tank, and the windbreak silencer chamber, and the second The cooling chamber, the oil tank, and the windbreak silencer chamber are integrally formed by castings.

In the said turbocompressor, since the windshield silencer chamber is located between a 1st cooling chamber and a 2nd cooling chamber, and an oil tank in a case by having the structure 1, the noise effect by a windproof silencer increases. Since an air layer exists between the oil tank and the 1st and 2nd cooling chambers, the heat transfer which generate | occur | produces between the air in a cooling chamber and the lubricating oil in an oil tank is suppressed.

In this turbo compressor, the manufacturing cost can be reduced by reducing the number of parts, and it can be installed in a narrow place including a windbreak silencer.

Moreover, in the said turbocompressor, since it has the structure 2, since the case is comprised integrally by the casting with the partition plate which divides the inside, the noise effect by a windbreak silencer can be increased.

That is, the turbo compressor can be provided in a narrow place including a wind silencer and can provide a turbo compressor which can sufficiently reduce the noise when exhausting the exhaust air to the outside.

1 is a plan view of a turbo compressor according to one embodiment of the present invention.
FIG. 2 is a side view of the turbo compressor of FIG. 1. FIG.
3 is a front view of the turbo compressor of FIG. 1.
4 is a cross-sectional view showing the configuration of a case of the turbo compressor of FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a plan view of a turbo compressor according to one embodiment of the present invention, FIG. 2 is a side view of the turbo compressor of FIG. 1, and FIG. 3 is a front view of the turbo compressor of FIG. 1.

Turbo-compressor according to one embodiment of the present invention is a so-called geared (geared) turbocompressor. As shown in FIGS. 1-3, this turbo compressor has the case 46 which consists of castings, and on this case 46, the centrifugal 1st stage compressor 5 and the centrifugal 2nd stage are shown. It is a two stage compressor provided with the compressor 6.

This turbo compressor rotates the impeller of the 1st stage and the 2nd stage compressors 5 and 6 at high speed by the output shaft 2 of the drive motor 1 used as a drive means, through the gear device 3, The air is compressed by applying kinetic energy to the sucked air (gas) and decelerating the sucked air efficiently and converting it into pressure . In this turbocompressor, intermediate cooling is performed to approximate isothermal compression, thereby increasing the overall compression efficiency.

The drive motor 1 is what is called a flange motor, and is fixed on the case 46 via the flange 1a. The rotating shaft 4 is arrange | positioned parallel to the output shaft 2 of the drive motor 1, and is connected to the output shaft 2 via the gear device (accelerator) 3. As shown in FIG. The 1st stage compressor 5 is provided in the edge part by the side of the drive motor 1 of this rotating shaft 4. At the end opposite to the rotating shaft 4, a second stage compressor 6 is provided. The driving shaft is transmitted to the rotating shaft 4 via the gear device 3 at the center portion, and an impeller of the first stage compressor 5 is mounted on one end side which becomes the driving motor 1 side, and the second end on the other end side. The impeller of the compressor 6 is attached.

The first stage and second stage compressors 5 and 6 are configured to include a diffuser and a vortex chamber around the impeller attached to the rotary shaft 4. The first stage and second stage compressors 5, 6 accelerate the air (gas) sucked in the center of the impeller to the radially outer side by rotating the impeller at high speed. The accelerated air is decelerated through the diffuser and the vortex chamber so that the kinetic energy given to the air is converted into pressure energy .

In the gear device 3, a standby gear ( bull gear) is connected to the output shaft 2 of the drive motor 1, and a small gear (pinion gear) meshed with the standby gear is rotated at high speed, The driving force is transmitted to the rotating shaft (4).

4 is a cross-sectional view showing the configuration of a case of the turbo compressor of FIG.

In the case 46, the oil tank 60 in which the 1st and 2nd cooling chambers 44 and 45 which become a path | route which guides air, and the lubricating oil required for the bearing of the rotating shaft 4 or the gear device 3 are filled. ) And a wind-proof silencer chamber (blow tank) 80. The 1st heat exchanger (intercooler) 47 and the 2nd heat exchanger (aftercooler) 48 for cooling air are accommodated in the 1st cooling chamber 44 and the 2nd cooling chamber 45. As shown in FIG. The case 46 is casted together with a partition plate that divides the interior into a first cooling chamber 44, a second cooling chamber 45, an oil tank 60, and a windbreak silencer chamber 80. It is constructed integrally. The windbreak silencer chamber 80 accommodates the windbreak silencer 82 and is located between the first cooling chamber 44, the second cooling chamber 45, and the oil tank 60.

And as shown in FIG. 1, the suction pipe 7 and the suction filter 8 of the 1st stage compressor 5 are arrange | positioned at the side of the drive motor 1. The suction filter 8 is for preventing the inhalation of foreign matter in the atmospheric air. In this turbocompressor, outside air is sucked from the suction pipe 7 by the first stage compressor 5, and the outside air is compressed by the first stage compressor 5, and passes through the air passage part of the case 46. As shown in FIG. 4, the inlet 44a of the first cooling chamber 44 is sent to the first cooling chamber 44 of the case 46.

The compressed air sent to the first cooling chamber 44 is about 200 ° C, but is cooled to about 40 ° C by the first heat exchanger 47. The air cooled by the first heat exchanger 47 passes from the first cooling chamber 44 to the second stage compressor 6 via the outlet 44b of the first cooling chamber 44 and the pipe 9. Is sent to.

The second stage compressor 6 again compresses the sent air and passes the compressed air from the inlet 45a of the second cooling chamber 45 via the air passage part 10 of the case 46. It is sent to the 2nd cooling chamber 45 of (46). The air of about 200 ° C sent to the second cooling chamber 45 is cooled to about 40 ° C by the second heat exchanger 48. The air cooled by the second heat exchanger 48 is discharged from the second cooling chamber 45 via the outlet 45b of the second cooling chamber 45. Since the air discharged | emitted from the outlet 45b of the 2nd cooling chamber 45 is used in a factory etc., it is sent through the piping which is not shown in figure.

In the turbo compressor, when the compressed air is surplus in a factory or the like, and the consumption amount of the compressed air decreases with respect to the amount of intake of outside air, the outlet pressure of the compressor increases. And when the pressure value detected by the sensor provided in the compressor outlet part exceeded the preset value, the windbreak valve 83 opens. At this time, the unused compressed exhaust gas is sent into the windbreak silencer chamber 80 via a pipe 81 connecting the outlet 45b of the second cooling chamber 45 and the windshield silencer chamber inlet 80a. . The exhaust gas sent to the windbreak silencer chamber 80 is discharged to the outside air from the windbreak silencer chamber outlet 80b via the windbreak silencer 82 stored in the windbreak silencer chamber 80. The windbreak silencer 82 emits the compressed exhaust air in the windproof silencer chamber 80 while making noise, and lowers the flow velocity of the exhaust air. Sound is reduced. The windbreak silencer 82 has a structure including a muffler with a small pressure loss and a duct provided with a sound absorbing material, and suppresses noise.

In this turbocompressor, other units constituting the turbocompressor, that is, an intake control valve for controlling the flow of air, a control panel for controlling operation and stop or a control valve, a lubrication device necessary for lubrication of bearings, gears, and lubricating oil are provided. Since it does not leak to the outside of the case 46, all the flue gas apparatuses etc. which hold the inside of the case 46 at negative pressure are provided on the case 46, and space saving is aimed at, have.

In addition, in this turbo compressor, since the windshield silencer 82 is accommodated in the case 46, the number of parts can be reduced, manufacturing cost can be reduced, and the windshield silencer is also included in a narrow place. Can be installed.

In this turbo compressor, the windbreak silencer chamber 80 is located between the first cooling chamber and the second cooling chambers 44 and 45 and the oil tank 60, and the case 46 is placed on the casting. By being comprised integrally by this, the noise effect by the windbreak silencer 82 can be increased. When the compressed air is released into the atmosphere, the sound pressure level is 120 dB or more, but the wind can be attenuated and attenuated in the wind silencer chamber 80 to sufficiently reduce noise outside the turbo compressor. Can be reduced.

When the oil tank 60 is embedded in the case 46, heat exchange occurs in the partition walls with the first and second cooling chambers 44 and 45, the lubricating oil absorbs heat from the hot air, and the cooled air is returned again. I warm it. If this phenomenon occurs, it is necessary to increase the capacity of the oil cooler, and a decrease in the compressor efficiency is caused by an increase in the air temperature. In this turbo compressor, since the temperature rise of the lubricating oil in the oil tank 60 is suppressed, it is not necessary to increase the capacity of the oil cooler, and the compressor efficiency does not decrease due to the increase in the air temperature.

[Industrial Availability]

This invention is applied to the turbocompressor used for a power source and a process of a factory, and is especially applied to the turbocompressor which built the windproof silencer chamber in the case and aimed at compactness and silence.

Claims (2)

case;
A centrifugal first compression unit provided on the case;
A second compression stage of the centrifugal type installed on the case; And
A driving unit driving the first stage compression unit and the second stage compression unit;
Lt; / RTI >
The case includes a first cooling chamber in which a first heat exchanger is accommodated and external air compressed by the first stage compression unit is sent, and a second heat exchanger is accommodated in the second stage via the first cooling chamber. A second cooling chamber through which the air compressed by the compression unit is sent again, an oil tank containing the lubricating oil sent to the driving unit, and a windproof silencer chamber through which the exhaust gas discharged to the atmosphere is sent through the second cooling chamber. divided into a silencer chamber,
The windproof silencer chamber accommodates the windproof silencer and is located between the first cooling chamber, the second cooling chamber, and the oil tank in the case.
Turbo compressor. The method of claim 1,
The case includes a partition plate that divides the interior into the first cooling chamber, the second cooling chamber, the oil tank, and the windbreak silencer chamber, wherein the first cooling chamber, the second cooling chamber, The oil compressor and the windproof silencer chamber are integrally formed by castings.

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