JP2013040592A - Turbo-compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turbo-compressor which can be installed even in a narrow place, including a blowoff silencer, and which can sufficiently reduce noises when unused and compressed exhaust gas is discharged into outside air.SOLUTION: The turbo-compressor includes a cabinet 1 in which a compressor body 2 is installed in an upper portion, and the blowoff silencer 12 which is detachably built in the cabinet 1. The blowoff silencer 12 has an exhaust gas channel 15 which includes an exterior wall portion 13 and an interior wall portion 14 made of a punching metal arranged along the exterior wall portion 13 on the inside of the exterior wall portion 13. The exhaust gas channel 15 is a channel which is bent in a U-shape and which leads to an exhaust port 17, positioned below an introduction port 16, from the introduction port 16 subject to the introduction of the exhaust gas from the compressor body 2; a cross-sectional area of the channel is set larger on the side of the exhaust port 17 than on the side of the introduction port 16; and a space between the exterior wall portion 13 and the interior wall portion 14 is filled with glass wool 19.

Description

  The present invention relates to a turbo compressor used as a power source or process for a factory, and more particularly, to a turbo compressor having a built-in ventilation silencer.

  Conventionally, turbo compressors are used for power sources and processes in factories. In the turbo compressor, even when the compressed air is not used in a factory or the like, the compressed air is maintained in an exhausted state. At this time, compressed air that is not used is discharged to the outside air. When discharging compressed air to the outside air in this way, noise is generated, and thus a wind release silencer is used. The air discharge silencer is configured to reduce noise by introducing compressed air that is not used and reducing the flow rate of the compressed air. This wind release silencer is installed separately from the turbo compressor.

  Japanese Patent Laid-Open No. 2004-228561 describes a wind-release silencer that is installed separately from a turbo compressor. The air discharge silencer is configured to communicate an air discharge pipe having one end connected to a low temperature side of an aftercooler of a turbo compressor to an air discharge port of an intake adjustment valve provided on a downstream side of the suction filter. The air discharge pipe connected to the side is communicated with a silencing space formed in an installation table on which the motor is installed. The discharged compressed air is introduced into the sound deadening space through the air discharge pipe, the air outlet, and the air discharge destination pipe, and the compressed air in the sound deadening space is exhausted from the exhaust outlet.

  Such a wind silencer is prepared separately from the turbo compressor by the customer, and piping from the outlet of the turbo compressor to the wind silencer is performed by the customer.

JP 2001-289168 A

  By the way, in the turbo compressor as mentioned above, since the air discharge silencer has to be installed separately from the turbo compressor, a place for it must be secured. In addition, there are restrictions on the positions of the piping to the discharge silencer and the intake adjustment valve, and the installation position is restricted. And it is complicated for a customer to manufacture and assemble piping.

  Furthermore, there are cases where noise cannot be sufficiently reduced even when such a wind-release silencer is used. That is, the passage portion of the compressed air in the blast silencer is linear, the effect of reducing the flow velocity is insufficient, and the sound cannot be sufficiently reduced.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and can be installed in a narrow place including an air discharge silencer, and discharges compressed exhaust that is not used to the outside air. It is an object of the present invention to provide a turbo compressor that can sufficiently reduce noise at the time.

  In order to solve the above-described problems and achieve the above object, a turbo compressor according to the present invention has the following configuration.

[Configuration 1]
Equipped with a casing where the compressor body is installed at the top and a breezer silencer that is detachably incorporated in the hood, and the blast silencer is arranged along the outer wall portion on the inner side of the outer wall portion and the outer wall portion And an exhaust passage formed by an inner wall portion made of punched metal, and the exhaust passage extends from an inlet to which exhaust from the compressor body is introduced to an outlet located below the inlet. It is a flow path bent in a letter shape, the flow path cross-sectional area is wider on the discharge port side than the introduction port side, and glass wool is filled between the outer wall portion and the inner wall portion. To do.

[Configuration 2]
In the turbo compressor having the configuration 1, the diffuser in which the introduction port of the air discharge silencer is formed of a cylindrical member that is open at one end where the exhaust is introduced and is closed at the other end, and has a plurality of through holes in the peripheral wall portion. Is arranged.

[Configuration 3]
In the turbo compressor having the configuration 1 or the configuration 2, the glass wool is a glass wool board molded into a flat plate shape.

  Since the turbo compressor according to the present invention has the configuration 1, the turbo compressor includes a housing in which the compressor main body is installed at the upper portion and a wind release silencer that is detachably incorporated in the housing. It is not necessary to install a wind silencer separately from the turbo compressor, and a space for it is also unnecessary. In addition, it is not necessary to perform piping up to the blast silencer, and it is not necessary for the customer to manufacture or assemble the piping.

  The air release silencer has an exhaust passage having an outer wall portion and an inner wall portion made of a punching metal disposed along the outer wall portion on the inner side of the outer wall portion, and a glass cloth pasted on the outer surface of the inner wall portion. The exhaust passage is a U-shaped bent passage extending from an inlet through which exhaust from the compressor main body is introduced to an outlet located below the inlet, and is more exhausted than the inlet side. Since the cross-sectional area of the flow path is wider on the outlet side and glass wool is filled between the outer wall and the inner wall, it is possible to sufficiently reduce the flow velocity of the exhaust from the compressor body, and noise is sufficient Can be reduced.

  Moreover, in this turbo compressor, since the diffuser is arrange | positioned at the inlet of a ventilation silencer by having the structure 2, a noise can fully be reduced.

  Furthermore, in this turbo compressor, since it is the glass wool board in which the glass wool is formed into a flat plate shape by having the configuration 3, it is possible to fill a certain amount of glass wool without any spots anywhere in the exhaust passage. In addition, the filling operation into the exhaust passage is easy.

  That is, the present invention is a turbo compressor that can be installed in a narrow place including a wind release silencer and that can sufficiently reduce noise when releasing compressed exhaust that is not used to the outside air. Can be provided.

1 is a side view of a turbo compressor according to an embodiment of the present invention. It is a top view of the turbo compressor concerning the embodiment of the present invention. 1 is a front view of a turbo compressor according to an embodiment of the present invention. It is a longitudinal section showing the composition of the case of the turbo compressor concerning the embodiment of the present invention. It is a longitudinal cross-sectional perspective view which shows the structure of the housing | casing of the turbo compressor which concerns on embodiment of this invention. It is a side view which shows the structure of the ventilation silencer of the turbo compressor which concerns on embodiment of this invention. It is a side view which shows the structure of the diffuser of the ventilation silencer of the turbo compressor which concerns on embodiment of this invention.

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

  FIG. 1 is a side view of a turbo compressor according to an embodiment of the present invention.

  FIG. 2 is a plan view of the turbo compressor according to the embodiment of the present invention.

  FIG. 3 is a front view of the turbo compressor according to the embodiment of the present invention.

  The turbo compressor according to the present invention is a so-called geared turbo compressor, and has a casing 1 as shown in FIGS. 1 to 3, and a centrifugal compressor body 2 is installed on the casing 1. Has been configured. The compressor main body 2 includes a main prime mover 3 and a compressor 4 driven by the main prime mover 3. The compressor 4 is installed on the distal end side of the rotary shaft 5 that is rotated at high speed by the main prime mover 3. The compressor 4 includes first to third stage compressors.

  This turbo compressor rotates the impellers (impellers) of the first to third stage compressors of the compressor 4 at high speed by the driving force of the main prime mover 3, and gives kinetic energy to the sucked air (gas). This is a three-stage compressor that compresses air (gas) by efficiently decelerating this and converting it to pressure. In this turbo compressor, intermediate cooling is performed between the compressors of each stage to approximate isothermal compression, and the volumetric efficiency is increased to increase the overall compression efficiency.

  The first to third stage compressors are configured to include a diffuser and a swirl chamber around each impeller that is rotated by the rotation shaft 5. The first-stage to third-stage compressors accelerate air (gas) sucked in the central portion of the impeller radially outward by rotating the impeller at high speed. The accelerated air is decelerated through the diffuser and swirl chamber, and the speed is converted to pressure.

  In this turbo compressor, outside air is sucked in from the suction pipe 6 by the first stage compressor, and this outside air is compressed by the first stage compressor, passes through the piping, and passes through the first cooling chamber (first intercooler) 7. Sent to. The compressed air sent to the first cooling chamber 7 is cooled and sent from the first cooling chamber 7 to the second stage compressor via the piping. The second stage compressor further compresses the sent air and sends it to the second cooling chamber (second intercooler) 8 through the piping. The air sent to the second cooling chamber 8 is cooled and sent from the second cooling chamber 8 through the piping to the third stage compressor. The third stage compressor further compresses the sent air and sends it to the third cooling chamber (aftercooler) 10 via the pipe 9. The air sent to the third cooling chamber 10 is cooled, passed through a ventilating control valve 10a, and sent through a pipe (not shown) for use in a factory or the like.

  FIG. 4 is a longitudinal sectional view showing the configuration of the casing of the turbo compressor according to the embodiment of the present invention.

  FIG. 5 is a longitudinal sectional perspective view showing the configuration of the casing of the turbo compressor according to the embodiment of the present invention.

  The turbo compressor is maintained in a state where the compressor 4 is driven even when the compressed exhaust is not used in a factory or the like. At this time, compressed exhaust that is not used is sent from the third cooling chamber 10 to the air discharge silencer 12 in the housing 1 through the air discharge control valve 10a as shown in FIGS. The air sent to the wind release silencer 12 and passed through the wind release silencer 12 is discharged to the outside air through the discharge pipe 11. The exhaust silencer 12 introduces exhaust that is not used, and reduces noise by reducing the flow rate of the exhaust.

  As shown in FIGS. 4 and 5, the air release silencer 12 is built in the housing 1. The air release silencer 12 is detachable from the housing 1. The air release silencer 12 has a structure provided with a porous material, and reduces the flow rate of the introduced exhaust to suppress noise.

  FIG. 6 is a side view showing the configuration of the wind silencer of the turbo compressor according to the embodiment of the present invention.

  As shown in FIG. 6, the air discharge silencer 12 includes an outer wall portion 13 and an exhaust flow composed of an inner wall portion 14 made of punching metal disposed along the outer wall portion 13 on the inner side of the outer wall portion 13. A path 15 is provided. The exhaust passage 15 has a U-shape (U) in which each corner from the inlet 16 into which the exhaust from the compressor main body 2 is introduced to the outlet 17 located below the inlet 16 is substantially perpendicular. -shaped with all corners in straight angles). The exhaust channel 15 has a larger channel cross-sectional area on the discharge port 17 side than on the introduction port 16 side.

  A glass cloth 18 is attached to the outer surface of the inner wall portion 14. And between the outer wall part 13 and the inner wall part 14, the glass wool 19 is filled. In addition, a diffuser 20 is disposed at the introduction port 16 of the blast silencer 12.

  FIG. 7 is a side view showing the configuration of the diffuser of the wind silencer of the turbo compressor according to the embodiment of the present invention.

  The diffuser 20 is formed of a cylindrical member that is open at one end where the exhaust gas is introduced and closed at the other end, and has a large number of through holes 21 over substantially the entire peripheral wall portion.

  In the air release silencer 12, when the exhaust gas passes through the flow path 15 bent in a U shape, the sound passes through the inner wall portion 14 made of punching metal and is absorbed by the glass wool 19. Further, the flow velocity is also reduced by the pressure loss due to the structure of the flow path 15 bent in a U-shape.

  In this turbo compressor, since the blast silencer 12 is housed in the housing 1, the number of parts can be reduced, the manufacturing cost can be reduced, and the blast silencer 12 is also included. It can be installed in a narrow place.

  In this turbo compressor, the glass wool 19 of the air release silencer 12 can be a glass wool board molded into a flat plate shape. By filling the glass wool board between the outer wall portion 13 and the inner wall portion 14, the movement of the glass wool due to the exhaust pressure can be prevented, and the silencing effect can be maintained for a long time.

  Further, by using the glass wool board, the glass wool can be easily exchanged, and the silencing effect can be easily maintained for a long time.

  The present invention is applied to a turbo compressor used for a power source or a process in a factory, and in particular, to a turbo compressor in which an air discharge silencer is incorporated in a casing to achieve noise reduction.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Compressor main body 12 Ventilation silencer 13 Outer wall part 14 Inner wall part 15 Exhaust flow path 16 Inlet 17 Ejector 19 Glass wool 20 Diffuser

Claims (3)

A casing in which the compressor body is installed at the top;
An air bleed silencer that is detachably incorporated in the housing, and
The air release silencer has an exhaust flow path constituted by an outer wall portion and an inner wall portion made of a punching metal disposed along the outer wall portion on the inner side of the outer wall portion,
The exhaust flow path is a flow path bent in a U shape from an inlet to which exhaust from the compressor body is introduced to an outlet located below the inlet, and from the inlet side The turbo compressor is characterized in that a flow passage cross-sectional area is wider on the discharge port side, and glass wool is filled between the outer wall portion and the inner wall portion. A diffuser having a plurality of through holes formed in a peripheral wall portion is disposed at the introduction port of the air release silencer, which is formed of a cylindrical member that is open at one end where exhaust is introduced and closed at the other end. The turbo compressor according to claim 1. The turbo compressor according to claim 1, wherein the glass wool is a glass wool board molded into a flat plate shape.

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