JP2005171957A - Package type compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a package type compressor requiring small electric power consumption by reducing power consumption of a fan cooling and ventilating inside of a package while securing necessary air quantity. <P>SOLUTION: This package type compressor 1 is provided with a drive motor 60, an intake duct 14 for guiding cooling air flowing in from a cooling air inflow port 13 to a flow along the outer periphery of the drive motor 60, and an exhaust duct 17 for passing the cooling air guided around the motor 60 through an oil cooler 80 and then guiding the cooling air to a cooling air discharge port 16 provided inside the package 10, inside the same chamber formed inside the package 10 of the package type compressor 1. The single fan 64 for generating a flow of the cooling air from the cooling air inflow port 13 to the cooling air discharge port 16 and rotated by a fan motor 2 provided separately from the drive motor 60 is arranged on a flow passage of the cooling air from the drive motor 60 to the cooling air discharge port 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a compressor body, a package type compressor in which devices constituting a compressor such as a drive motor, an oil separator, and an oil cooler that drive the compressor body are housed in a package, and more particularly, a package The present invention relates to a package type motor-driven compressor provided with a cooling mechanism for cooling a device accommodated therein.

  In the package, the compressor body, a drive motor for driving the compressor, an oil separator for separating the lubricant discharged together with the compressed gas from the compressed gas, and the lubricant separated and recovered in the oil separator are cooled. A package type compressor that contains an oil cooler or the like for cooling the inside of the package, and introducing cooling air into the package for heat exchange with the lubricating oil introduced into the oil cooler. A configuration for cooling them is provided.

  As an example of such a package type compressor 1, as shown in FIG. 6, a first chamber 111 containing a drive motor 60 and a compressor body 50, and an oil cooler 80 and an aftercooler 81 are contained in the package 10. A fan 64 provided on the drive motor 60 is arranged facing the first air inlet 131 formed on the side wall of the first chamber 111, and is divided into two chambers 112 by a partition plate 181. Extending to the second chamber 112 through an opening 182 formed in the partition plate 181, a double-suction multiblade fan 66 is attached to the main shaft in the second chamber 112, and the second chamber 112 has a side wall on the side wall of the second chamber 112. A package mold pressure in which an air cooler 81 and an oil cooler 80 are disposed in the package 10 so as to face the air flow outlet 161. There are machine 1 (Patent Document 1).

  In the package-type compressor 1 having the above-described configuration, when the motor 60 rotates, the outside air is circulated through the first air inlet 131 by the cooling fan 64 that rotates as the motor 60 rotates. The motor 60 and other devices disposed in the first chamber 111 are cooled, and the first multi-blade fan 66 is rotated through the opening 182 formed in the partition plate 181 by the rotation of the both suction multiblade fans 66. The air in the chamber 111 is introduced into the second chamber 112, and an opening formed in the partition plate 181 from the first air inlet 131 by the action of the cooling fan 64, the suction multiblade fan 66, and the two fans. A flow of cooling air toward 182 is generated.

  The air in the first chamber 111 introduced into the second chamber 112 and the outside air introduced into the second chamber 112 through the second air inlet 132 provided on the side wall of the second chamber 112. Then, after being guided to the air outlet 161 by the both suction multi-blade fans 66 described above, the aftercooler 81 and the oil cooler 80 are cooled and then discharged outside the apparatus.

Prior art document information of the present invention includes the following.
JP-A-10-30594 (page 3-4, FIG. 1).

  In the package compressor 1 described in Patent Document 1 including the cooling mechanism described above, the cooling fan 64 is introduced into the first chamber 111 that houses the motor 60 through the first air inlet 131. Air outside the machine is introduced, and the air that has cooled the inside of the first chamber 111 is introduced into the second chamber 112 through the opening 182 formed in the partition plate 181 by the double suction type multiblade fan 66. Therefore, the cooling fan 64 is not returned to the side, and as a result, the cooling efficiency of the motor 60 can be improved.

  However, in the package type compressor 1 configured as described above, the cooling air introduced into the package 10 by the cooling fan 64 via the first air inlet 131 is sucked and guided by the double suction multiblade fan 66. As a result, the plurality of fans 64 and 66 are required, so that the number of manufacturing steps increases due to an increase in the number of parts, and the manufacturing cost increases. Moreover, the power for rotating a plurality of fans is required, and the power consumption increases.

  In the conventional package type compressor 1 described above, the air sucked into the first chamber 111 by the cooling fan 64 is sucked into the second chamber 112 by the both suction multi-blade fans 66 and the air outlet 161. Since the two fans 64 and 66 are provided in the same cooling air flow path, the air introduced into the first chamber 111 by the cooling fan 64 is discharged from the package 10 to the outside of the package 10. If the amount of air in the first chamber 111 introduced into the second chamber 112 by the double suction multiblade fan 66 with respect to the amount (air flow) is large, the inside of the first chamber 111 becomes a strong negative pressure, and the double suction multiblade The power required to rotate the fan 66 increases.

  Further, if the amount of air introduced from the first chamber 111 into the second chamber 112 is reduced by the negative pressure of the first chamber 111, an air volume necessary for cooling the oil cooler 80 and the aftercooler 81 is obtained. There is a risk of not being able to.

  Therefore, in the invention described in Patent Document 1, the second air inlet 132 for directly introducing the outside air into the second chamber 112 is provided separately from the first air inlet 131, and the first The fan 66 provided in the two chambers 112 is of a double suction type, so that the air in the first chamber 111 is sucked through the opening 182 formed in the partition plate 181 and the second air inlet 132 is interposed. The outside air can be introduced at the same time. Therefore, the structure of the entire apparatus is complicated.

  On the contrary, the amount of air (air volume) introduced from the first chamber 111 to the second chamber 112 by the double suction multiblade fan 66 is different from the amount of air introduced into the first chamber 111 by the cooling fan 64. If it is small, there is a problem that the pressure in the first chamber 111 becomes high and the power consumption of the cooling fan 64 becomes larger than necessary, and the power consumption accompanying this increases, which is not economical.

  As described above, the problem that the amount of air for cooling the oil cooler 80 is insufficient or the power for operating the fan is increased to increase the power consumption is described in the above-mentioned Patent Document 1. This problem may occur when a plurality of fans are arranged in series in the same cooling air flow path, and such a problem occurs when the amount of air sucked into the respective fans does not match.

  In the case where the fans are arranged in series in this way, in view of the fact that it is very difficult to match the intake air amount (air volume) of each fan by design, the above configuration is adopted as long as the above-described configuration is adopted. It is difficult to solve the problem.

  Therefore, the present invention has been made for the purpose of eliminating the drawbacks of the above-described prior art with a relatively simple device configuration, and is necessary for cooling the drive motor and the oil cooler that drive the compressor body. An object of the present invention is to provide a package type compressor that consumes less power and reduces the power consumption of a fan that cools and ventilates the inside of the package while securing the air volume.

In order to achieve the above object, the package type compressor of the present invention is a package type in which a compressor main body 50, a drive motor 60 for driving the compressor main body 50, an oil separation device 70, and an oil cooler 80 are accommodated in the package 10. In the compressor 1,
An intake duct for guiding the cooling air flowing from the driving motor 60 and the cooling air inlet 13 provided in the package 10 into a flow along the outer periphery of the driving motor 60 in the same chamber formed in the package 10. 14 and an exhaust duct 17 for guiding the cooling air guided along the outer periphery of the drive motor 60 to the cooling air discharge port 16 provided in the package after passing through the oil cooler 80, and
A single fan 3 that generates a flow of cooling air from the cooling air inlet 13 to the cooling air outlet 16 and is rotated by a fan motor 2 provided separately from the driving motor 60 is It is arranged in a cooling air flow path from the driving motor 60 to the cooling air discharge port 16 (see claim 1, FIG. 1, FIG. 3 to FIG. 5).

  In the package compressor 1 having the above-described configuration, the fan 3 can be an axial flow fan disposed opposite to the oil cooler 80 (Claim 2).

  Further, in the package type compressor 1 having the above-described configuration, there is provided guidance means made of, for example, a partition plate 18 for guiding the cooling air guided to the outer periphery of the drive motor 60 to the exhaust duct 17. (Refer to claim 3 and FIG. 3). By the guiding means composed of the partition plate 18 and the like, the motor chamber 102 in which the drive motor 60 is accommodated in the package 10, the compressor main body 50, the oil separator 70 and the like It is good also as a structure divided | segmented into the compressor chamber 101 which accommodates the apparatus of this.

  Further, in the package type compressor 1 having the above-described configuration, the intake duct 14 and the exhaust duct 17 are communicated (in the illustrated example, by an intermediate duct 19), and the cooling air outlet 16 and the cooling air outlet 16 are connected. The drive motor 60 and the fan 3 may be arranged together in the series of ducts (see claim 4: FIG. 4).

  When the compressor body 50 is an air compressor, a suction flow path 4 that extends the suction port 505 of the compressor body 50 to the outside of the package 10 can be provided (Claim 5). FIG. 5).

  With the above-described configuration of the present invention, the cooling air inlet 13 to the cooling air outlet 16 are provided by the single fan 3 disposed in the cooling air flow path from the drive motor 60 of the compressor body 50 to the cooling air outlet 16. Since the entire amount of outside air introduced into the package 10 through the cooling air inlet 13 passes through the outer periphery of the drive motor 60, the drive motor can be driven with less power consumption. 60 could be efficiently cooled.

  In addition, since the configuration including only the single fan 3 can be obtained, the space in the package 10 can be reduced, and thus the package 10 itself can be reduced in size, and the single cooling air inlet 13 can be used. Since the cooling can be performed by the introduced cooling air, the structure of the package can be simplified and can be manufactured at low cost.

  Further, since the fan 3 is driven by the fan motor 2 provided separately from the drive motor 60, the degree of freedom of the arrangement of the fan 3 is increased, and the fan 3 can be arranged opposite to the oil cooler 80. As a result, the cooling air can be reliably introduced into the oil cooler 80, and the cooling efficiency can be improved.

  Further, by providing guiding means such as the partition plate 18 described above, the cooling air guided to the outer periphery of the drive motor 60 of the compressor body 50 is guided to the exhaust duct 17, thereby reducing the flow resistance of the cooling air. The power consumption required for the rotation of the fan 3 could be further reduced.

  Further, a series of ducts are formed between the intake duct 14 and the exhaust duct 17 by, for example, an intermediate duct 19 to reach the cooling air outlet 16 from the cooling air inlet 13 and the drive motor 60 of the compressor main body 50 is formed in this duct. And the fan 3 can be arranged together, the flow resistance of the cooling air from the cooling air inlet 13 to the cooling air outlet 16 can be more reliably reduced, and the drive motor 60 of the compressor body 50 can be reduced. The cooling air can be reliably guided to the outer periphery of the motor, and the cooling efficiency of the drive motor 60 can be further improved.

  In the case where the compressor body 50 is an air compressor, in the configuration in which the suction passage 506 extending the suction port 505 of the compressor body is provided outside the package, the air in the package 10 is transferred to the compressor body. It was possible to suitably prevent the amount of cooling air introduced into the oil cooler 80 from being reduced by the suction of 50.

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1
In FIG. 1, reference numeral 1 denotes a package type compressor provided with a cooling mechanism of the present invention.

  The package type compressor 1 includes an oil-cooled compressor main body 50 for compressing a compressed gas (for example, fuel gas) in a package 10, a drive motor 60 for driving the compressor main body 50, and the compressor. An oil separator 70 for separating the lubricating oil discharged from the main body 50 as a gas-liquid mixed fluid with the compressed gas, and an oil cooler 80 for cooling the recovered lubricating oil separated from the compressed gas in the oil separating apparatus 70. It is configured to accommodate other devices constituting the compressor.

  In the present embodiment, the drive motor 60, the compressor body 50, and the oil separation device 70 that drive the compressor body 50 described above are configured as a so-called motor-integrated compressor in which these are integrally formed. This is arranged in the package 10.

  In the motor-integrated compressor, as shown in FIG. 2, the compressor main body 50 accommodates a pair of male and female screw rotors 501 and 502 in a rotor chamber 504 of a cylinder 503 so as to be capable of meshing rotation. An oil-cooled compressor body that injects lubricating oil, which is a cooling medium, into the rotor chamber 504 in the process of introducing and compressing fuel gas by the rotation of the rotors 501 and 502, and the axis of the screw rotors 501 and 502 A fuel gas suction pipe 92 extending from the outside of the machine is connected to one side of the cylinder 503 with respect to the direction to form a suction port 505 for sucking fuel gas and a suction passage following the suction port. A suction-side casing 508 for housing a bearing 507 for supporting the suction-side rotor shafts 501a and 502a of 501 and 502, and the screw rotor 501; A discharge port and a discharge passage for discharging fuel gas are formed on the other side of the cylinder 503 with respect to the axial direction of 502, and a bearing 507 for supporting the discharge-side rotor shafts 501b and 502b of the screw rotors 501 and 502 is accommodated. And a discharge-side casing 511.

  The suction-side casing 508 and the cylinder 503 are integrally formed, and the suction-side rotor shaft 501a of the male rotor 501 passes through the suction-side casing 508 and protrudes to the outside of the compressor body 50. The drive shaft.

  The oil separator 70 introduces a gas-liquid mixed fluid of fuel gas and lubricating oil compressed and discharged in the rotor chamber 504 of the compressor body 50, and separates the fuel gas and lubricating oil into fuel gas. This is supplied to the consumption side, and a receiver tank 71 that primarily separates the gas-liquid mixed fluid discharged from the compressor body 50, and a gas-liquid mixed fluid that is primarily separated in the receiver tank 71 are introduced to make fine A separator 72 for separating lubricating oil and supplying fuel gas to the consumption side via a fuel gas discharge pipe 91; and a connection port 73 for connecting the separator 72 to the receiver tank 71 and the interior of the receiver tank 71. An inspection port 74 for cleaning, a discharge-side casing 511 of the compressor body 50 is inserted into the receiver tank 71 from the inspection port 74, and the cylinder 503 The inspection port 74 formed by the opening of the receiver tank 71 is closed with a flange portion 77 formed at the connection portion with the discharge-side casing 511, and the compressor body 50 having the drive motor 60 fixed thereto is connected to the flange portion as will be described later. The drive motor 60, the compressor body 50, and the receiver tank 71 are integrally formed by being connected to the receiver tank 71 at 77.

  The drive motor 60 that rotationally drives the compressor body 50 has its rotor 61 fixed on the suction side rotor shaft 501a of the male rotor 501, thereby rotating the rotor shaft of the male rotor 501 and the rotor. The drive shaft and the rotation shaft of the motor 60 are all formed by a single shaft. Therefore, in this specification, the rotor shaft of the male rotor 501, the drive shaft for rotating the rotor, and the rotation shaft of the drive motor 60 all indicate the same member.

  Further, since the rotor shaft of the male rotor 501, the drive shaft for rotating the rotor, and the rotation shaft of the drive motor 60 are integrally formed as described above, the bearing 507 that supports the rotor shaft 501 a rotates the drive motor 60. A bearing 507 for supporting the shaft is also used. The stator 62 of the drive motor 60 is fixed in the motor casing 63.

  A cooling fin 65 (see FIG. 1) is formed on the casing 63 of the drive motor 60 so as to protrude substantially over the entire circumference, and the drive motor 60 is brought into contact with the cooling air described later. It is configured to be cooled.

  In the present embodiment, the drive motor 60, the compressor main body 50, and the oil separation device 70 are shown as an example configured as the above-described motor-integrated compressor in which these are integrally formed. 60, the compressor main body 50, and the oil separation device 70 may be used in combination in the package 10 as configured separately. In this case, a means for transmitting the rotation of the drive motor 60 to the drive shaft of the compressor body 50, for example, a joint for connecting the rotation shaft of the drive motor 60 and the drive shaft of the compressor body 50, a pulley and a pulley An interlocking mechanism such as a belt, piping that communicates between the compressor main body 50 and the oil separation device 70, and the like are accommodated in the package 10 together with the drive motor 60, the compressor main body 50, and the like.

  The package 10 for accommodating the motor-integrated compressor configured as described above includes a frame 11 on which the motor-integrated compressor configured as described above is placed, and the motor-integrated compressor on the frame 11. Each component device of the compressor is surrounded by a package 10 formed by the hood 12 covering the frame 11 and the hood 12 (see FIG. 1).

  In the illustrated example, the motor-integrated compressor is mounted on the frame 11 with the drive shaft 501a in the horizontal direction, and one end of the drive motor 60 is disposed opposite to the inner surface of the side wall of the bonnet 12. ing.

  A cooling air inlet 13 for introducing cooling air into the package 10 is formed on the side wall of the bonnet 12 facing one end of the drive motor 60, and the inside of the bonnet 12 at the position where the cooling air inlet 13 is formed. Is provided with an intake duct 14 for converting the cooling air introduced into the package 10 through the cooling air inlet 13 into an air flow that flows along the outer periphery of the drive motor 60.

  In the illustrated embodiment, the intake duct 14 is provided with a cylindrical portion 15 having an inner diameter slightly larger than the outer diameter of the drive motor 60, and an opening edge 15 a of the cylindrical portion 15 is provided in the cylindrical portion 15. One end of the drive motor 60 is accommodated so as to be concentric with the outer periphery of the drive motor 60, and is formed between the inner periphery of the cylindrical portion 15 of the intake duct 14 and the outer periphery of the casing 63 of the drive motor 60. The cooling air is formed so as to generate a flow along the outer periphery of the casing 63 of the drive motor 60 through the gap.

  In the illustrated example, the cooling fin 65 is formed on the outer periphery of the casing 63 with the length direction of the drive shaft of the drive motor 60 as the length direction, and the inner periphery of the cylindrical portion 15 is in contact with the cooling fin 65. The cooling air is guided along the recess formed between the cooling fins 65.

  The bonnet 12 of the package 10 is further provided with a cooling air discharge port 16 for discharging the cooling air introduced into the package 10 to the outside of the package 10, and a cooling air discharge port from the drive motor 60. A single fan 3 for generating a flow of cooling air from the cooling air inlet 13 to the cooling air outlet 16 in the flow path of the cooling air reaching 16 and the fan motor 2 for driving the fan 3 are connected to the driving motor. 60 is provided separately.

  The cooling air discharge port 16 described above can be provided at an appropriate position on the bonnet 12. However, when the cooling air introduced into the package 10 reaches the cooling air discharge port 16, the position can follow the flow path with less flow resistance. It is preferable to configure.

  In the present embodiment, the cooling air discharge port 16 is formed in the upper portion of the position where the drive motor 60 is disposed, and is introduced into the package 10 through the cooling air inlet 13 to cool the drive motor 60. However, it is configured so as to flow upward and then be discharged.

  Thus, in the illustrated embodiment, the cooling air corresponding to the formation position of the cooling air discharge port 16 formed on the top plate of the bonnet 12, the cooling air that has cooled the drive motor 60 is contained in the package 10. An exhaust duct 17 for guiding to the cooling air discharge port 16 is formed.

  As described above, the exhaust duct 17 formed corresponding to the formation position of the cooling air discharge port 16 formed on the top plate of the bonnet 12 opens toward the drive motor 60 disposed below the exhaust duct 17. The cooling air after cooling the drive motor 60 can be preferably guided to the cooling air outlet 16.

  The cooling air after cooling the drive motor 60 is in the flow path leading to the cooling air outlet 16 for cooling the lubricating oil separated and collected in the oil separation device 70 (receiver tank 71). An oil cooler 80 is disposed, and the cooling air comes into contact with the core of the oil cooler 80 before it is discharged outside the machine through the cooling air discharge port 16 to exchange heat with the lubricating oil, thereby cooling the lubricating oil.

  The oil cooler 80 may be installed in any position as long as it is in the flow path of the cooling air from the cooling of the drive motor 60 to the cooling air discharge port 16. The oil cooler 80 is disposed in the exhaust duct 17 described above so that heat can be exchanged between the cooling air after cooling the drive motor 60 and the lubricating oil.

  A fan for generating a flow of cooling air from the cooling air inlet 13 to the cooling air outlet 16 in the cooling air flow path between the drive motor 60 and the cooling air outlet 16 (axial flow fan). 3 and a fan motor 2 for driving the fan 3 are arranged. In the illustrated example, the lower end of the exhaust duct 17 is bent toward the center of the opening to form the shroud 17a of the fan 3, and this The fan motor 2 to which the fan 3 is attached to the rotating shaft is attached to the shroud 17a via the motor bracket 20 so that the above-described fan 3 can be disposed in the shroud 17a.

  In the illustrated embodiment, the fan 3 and the fan motor 2 that drives the fan 3 are arranged in the cooling air flow path between the drive motor 60 and the oil cooler 80. The fan 3 and the fan motor 2 may be disposed in the flow path of the cooling air between the oil cooler 80 and the cooling air discharge port 16, and in the illustrated embodiment, the fan 3 is a discharge type. Although illustrated as a thing, it may be of a suction type, and the oil cooler 80 does not necessarily have to be arranged in the orthogonal direction with respect to the axial extension of the rotating shaft of the fan motor 2. The configuration shown in the drawing is applicable as long as the cooling air can flow from the cooling air inlet 13 to the cooling air discharge port 16 by one fan 3 and the cooling air can pass through the oil cooler 80. Limit It can be employed Sarezu various configurations and arrangements.

  In the package type compressor 1 of the present invention configured as described above, when the fan motor 2 is rotated, the fan 3 attached to the rotating shaft of the fan motor 2 is rotated, whereby the outside air is supplied via the cooling air inlet 13. Is introduced into the package 10.

  Since the intake duct 14 is attached to the inner wall of the bonnet 12 at the position where the cooling air inlet 13 is formed as described above, the cooling air introduced into the package 10 through the cooling air inlet 13 is the intake air. It blows over the outer periphery of the motor through a gap formed between the inner periphery of the cylindrical portion 15 and the outer periphery of the casing 63 of the drive motor 60 through the duct 14.

  Thus, the cooling air blown out along the outer periphery of the drive motor 60 comes into contact with the cooling fins 65 formed on the outer periphery of the casing 63 of the drive motor 60 to suitably cool the drive motor 60, and this cooling It is guided by the fins 65 and flows along the outer periphery of the drive motor 60.

  In this way, the cooling air after contacting the cooling fins 65 of the drive motor 60 and cooling the motor 60 cools and ventilates the inside of the package 10, and then the inside of the exhaust duct 17 by the fan 3 rotated by the fan motor 2. The cooling air introduced into the exhaust duct 17 is guided to the exhaust duct 17 and discharged from the cooling air outlet 16 to the outside of the package 10.

  In the exhaust duct 17, an oil cooler 80 for cooling the lubricating oil separated and recovered by the oil separation device 70 as described above is disposed, and the cooling air passing through the exhaust duct 17 is inevitable. The oil cooler 80 passes through the oil cooler 80 while being in contact with the core of the oil cooler 80, and at this time, heat is exchanged with the lubricating oil to cool the lubricating oil. In particular, in the configuration in which the fan 3 is disposed opposite to the oil cooler 80 as in the illustrated embodiment, the cooling air can be reliably introduced into the oil cooler 80, and the cooling introduced into the oil cooler 80. The airflow will not decrease.

  As described above, in the package type compressor 1 of the present invention, the single fan 3 and the fan motor 2 that drives the single fan 3 generate cooling air that cools the inside of the package 10. The cooling and ventilation of the package 10 and the cooling of the oil cooler 80 can be performed by the single fan 3, and less power is required to rotate the fan than when a plurality of fans are provided, thereby reducing power consumption. In addition, the package 10 itself can be miniaturized and can be manufactured at low cost by reducing the number of parts.

  In particular, when a fuel gas such as liquefied petroleum gas (LPG) or city gas is used as the compressed gas, the compressed fuel gas is directly supplied from the outside of the package 10 via the fuel gas suction pipe 92 to the compressor main body 50. Since it is introduced into the suction port 505, the air in the package 10 is not introduced into the compressor body 50 and discharged outside the machine as compressed air, as in the case where the compressed gas is air.

  As a result, it is not necessary to consider the amount of air sucked by the compressor body 50 as the amount of air to be introduced into the package 10 via the cooling air inlet 13, and the fan 3 is made smaller than in the case of the air compressor. can do. As a result, the power required for the rotation of the fan 3 can be further reduced, and the power consumption can be reduced.

  In addition, since the cooling air introduced from outside the machine passes through the outer circumference of the drive motor 60 before passing through the oil cooler 80, the drive motor 60 can be sufficiently cooled. The cooling efficiency of the drive motor 60 is high.

  Furthermore, the fan motor 2 that drives the fan 3 is provided separately from the drive motor 60 that drives the compressor main body 50, so that the degree of freedom of the installation position of the fan 3 is increased and the fan cooler 80 faces the oil cooler 80. 3 can also be provided. As a result, the cooling air can be reliably applied to the oil cooler 80, and heat exchange with the lubricating oil passing through the oil cooler 80 can be reliably performed.

[Embodiment 2]
In the embodiment shown in FIG. 3, as compared with the embodiment shown in FIG. 1, a partition that partitions the inside of the package 10 as guiding means for guiding the cooling air that has cooled the drive motor 60 to the exhaust duct 17. A plate 18 is provided. The other points are the same as those in the first embodiment described with reference to FIG.

  For example, as shown in FIG. 3, the partition plate 18 divides the interior of the package 10 into a compressor chamber 101 and a motor chamber 102, and the partition plate 18 is formed by being divided by the partition plate 18. The compressor main body 50 and the oil separation device 70 are accommodated in the compressor chamber 101, and the drive motor 60, the oil cooler 80, the fan 3 and the fan motor 2 are accommodated in the motor chamber 102.

  In the illustrated embodiment, the aforementioned partition plate 18 is attached in the vertical direction in the figure near the boundary between the drive motor 60 and the compressor body 50, thereby dividing the inside of the package 10 into the left and right in the figure, Its upper end is connected to a shroud 17 a provided at the lower end of the exhaust duct 17.

  Accordingly, the cooling air inlet 13 and the cooling air discharge port 16 formed on the top plate of the bonnet 12 above the driving motor 60 are both side walls of the hood 12 in the motor chamber 102 in which the driving motor 60 is accommodated. In addition, the cooling air is formed on the top plate and guides the cooling air after cooling the driving motor 60 to the intake air duct 14 and the cooling air discharge port 16 for guiding the outside air introduced from the cooling air inlet 13 to the outer periphery of the driving motor 60. The exhaust ducts 17 are arranged in the same chamber (motor chamber 102).

  The partition plate 18 described above may completely divide the inside of the package 10 into two chambers. However, as described above, the cooling air after cooling the drive motor 60 is guided to the exhaust duct 17. The package 10 does not have to be strictly divided into two chambers, and the motor chamber 102 and the compressor chamber 101 may be divided so that they partially communicate with each other. good.

  In the package type compressor 1 configured as described above, the cooling air blown out between the inner periphery of the cylindrical portion 15 of the intake duct 14 and the outer periphery of the drive motor 60 is cooled while the drive motor 60 is cooled. After flowing along the outer periphery, the air is guided toward the exhaust duct 17 by being guided by the partition plate 18 arranged in front of the flow direction, passes through the oil cooler 80 and then passes through the cooling air discharge port 16. Discharged outside.

  Thus, the cooling air after cooling the drive motor 60 is not introduced into the compressor chamber 101 in which the compressor body 50 and the oil separation device 70 are arranged, but is guided directly to the exhaust duct 17 side by the partition plate 18. Is done. Therefore, by providing such a partition plate 18, the flow resistance of the cooling air can be reduced, and the power consumption of the cooling fan 3 can be reduced.

[Embodiment 3]
In the embodiment shown in FIG. 4, an intake duct 14 and an exhaust duct 17 are further communicated with the embodiment described with reference to FIG. A series of ducts leading to the outlet 16 is formed, and the drive motor 60 and the fan 3 are arranged together in the series of ducts.

  The communication between the intake duct 14 and the exhaust duct 17 may be configured such that an intermediate duct 19 that extends the lower end edge of the exhaust duct 17 downward is provided and the motor 60 is surrounded by the intermediate duct 19. Alternatively, a partition plate 18 similar to that of the embodiment described with reference to FIG. 3 is provided, and the motor chamber is located on the motor 60 side end edge of the cylindrical portion 15 of the intake duct 14 and partitions the motor chamber into the left and right in the drawing. The interior of the motor chamber 102 is further divided by a partition plate 18 ′ connected to the lower end edge of the exhaust duct 17, and a space formed between the two partition plates 18, 18 ′ is between the intake duct 14 and the exhaust duct 17. You may comprise the intermediate | middle duct 19 which connects these.

  In the illustrated embodiment, by providing such an intermediate duct 19, the motor bracket 20 is attached to the partition plates 18, 18 ′ that define the intermediate duct 19, and the fan motor 2. However, the mounting method may be the same as the method shown in FIG. 3, and the mounting method is not limited to the illustrated embodiment.

  In the illustrated example, the cooling air inlet 13 is formed at the same height as the drive motor 60 in order to reduce the flow resistance of the cooling air introduced into the package 10 from the cooling air inlet 13. Is configured to be introduced into the package 10 along a straight flow path, and accordingly, the intake duct 14 is configured only by a portion corresponding to the cylindrical portion 15 of the intake duct 14 in FIG. However, the formation position of the cooling air inlet 13 and the shape of the intake duct 14 may be the shapes described with reference to FIGS. 1 and 3, and are not limited to the illustrated embodiment.

  As described above, in the package compressor 1 of the present invention shown in FIG. 4, the cooling air introduced into the package 10 through the cooling air inlet 13 communicates the intake duct 14, the exhaust duct 17, and both ducts. Since the cooling air is introduced from the cooling air inlet 13 to the cooling air outlet 16 through a series of ducts formed by the intermediate duct 19, the flow resistance of the cooling air can be further reduced, The arranged fan 3 can efficiently generate a flow of cooling air from the cooling air inlet 13 to the cooling air outlet 16. As a result, the power consumption required for the rotation of the fan 3 can be reduced, and the drive motor 60 arranged in the duct formed in this way is reliably cooled by the cooling air passing through the duct. The

Example 4
Yet another embodiment of the package compressor 1 of the present invention is shown in FIG.

  In the embodiment shown in FIGS. 1, 3, and 4, the compressor main body 50 accommodated in the package compressor 1 is supplied with the fuel gas introduced into the suction port via the fuel gas suction pipe 92. In the embodiment shown in FIG. 5, the compressor main body 50 is configured to compress air, and the suction port 505 of the compressor main body 50 is extended outside the hood. A suction channel 4 is provided.

  In the illustrated embodiment, the inside of the package 10 is partitioned to form a suction duct 41 that communicates with an outside air suction port 40 formed at the upper end of the side wall of the package 10, and the suction duct 41 is connected to the air filter 42. The suction port 505 communicates with the suction port 505 of the compressor main body 50 through the suction pipe 43. However, the configuration is not limited to the illustrated example as long as the suction port 505 of the compressor main body 50 can be extended outside the hood 10. Various configurations can be employed.

  In the package type air compressor 1 formed in this way, the air compressed by the compressor body 50 is introduced from the outside of the package 10 through the suction flow path 4. Air introduced as cooling air is not consumed.

  As a result, even when the compressor main body 50 is used for air compression, the pressure in the package 10 is relatively lowered and the amount of cooling air supplied to the oil cooler 80 is reduced, so that the oil cooler 80 is cooled. The occurrence of inconvenience such as a reduction in efficiency can be suitably prevented.

  Further, when the compressor body 50 sucks air in the package 10, an extra amount of cooling air is introduced into the package 10 in consideration of the amount of air sucked by the compressor body 50. There is a need to. Therefore, when the gas to be compressed is air, it is necessary to increase the size of the fan 3 and the fan motor to increase the amount of introduced air. However, the configuration of the package compressor 1 of the present invention shown in FIG. Therefore, it is not necessary to consider the amount of air sucked by the compressor body 50 when introducing the cooling air, and the fan 3 and the fan motor 2 are installed in the same manner as the package type compressor 1 using the fuel gas as the compressed gas. While being able to reduce in size, the power consumption required for the drive of the fan 3 can be reduced by this.

  With the configuration of the present invention described above, the package type compressor of the present invention can be used in various fields using compressed gas, and particularly as a configuration of a package type compressor used for compression of fuel gas. It is suitable for adoption.

  Therefore, it is used to pressurize the fuel gas in various applications such as the supply of gas to an internal combustion engine using gas as fuel, the supply of gas to other gas equipment, and the pressurization of gas in the gas supply path to each household, etc. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing of the package type compressor concerning embodiment of this invention. Sectional drawing of a motor integrated compressor. The schematic explanatory drawing of the package type compressor concerning another embodiment of this invention. The schematic explanatory drawing of the package type compressor concerning another embodiment of this invention. The schematic explanatory drawing of the package type compressor concerning another embodiment of this invention. Schematic explanatory drawing of the conventional package type compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Package type compressor 10 Package 101 Compressor chamber 102 Motor chamber 11 Frame 111 1st chamber 112 2nd chamber 12 Bonnet 13 Cooling air inlet 131 First air inlet 132 Second air inlet 14 Intake duct 15 Cylindrical part (intake Of duct 14)
15a Open edge (of the cylindrical part 15)
16 Cooling air discharge port 161 Air outflow path 17 Exhaust duct 17a Shroud 18, 18 ', 181 Partition plate 182 Opening 19 Intermediate duct 2 Fan motor 20 Motor bracket 3 Fan 4 Suction flow path 40 Outside air suction port 41 Suction duct 42 Air filter 43 Suction tube
50 Compressor body 501 Rotor (male)
502 Rotor (female)
501a, 502a Suction side rotor shaft 501b, 502b Discharge side rotor shaft 503 Cylinder 504 Rotor chamber 505 Suction port 507 Bearing 508 Suction side casing 511 Discharge side casing 60 Drive motor 61 Rotor 62 Stator 63 Motor casing 65 Cooling fin 66 Double suction Multi-blade fan 70 Oil separator 71 Receiver tank 72 Separator 73 Connection port 74 Inspection port 77 Flange 80 Oil cooler 81 After cooler 91 Discharge piping 92 Fuel gas suction piping

Claims (5)

In a package type compressor containing a compressor main body, a drive motor for driving the compressor main body, an oil separation device, and an oil cooler in a package,
In the same room formed in the package, the drive motor, an intake duct for guiding cooling air flowing from a cooling air inlet provided in the package to a flow along the outer periphery of the drive motor, and the drive motor An exhaust duct that guides the cooling air guided along the outer periphery of the cooling air to the cooling air discharge port provided in the package after passing through the oil cooler;
A single fan that generates a flow of cooling air from the cooling air inlet to the cooling air outlet and that is rotated by a fan motor that is provided separately from the drive motor is connected to the cooling air from the drive motor. A package type compressor characterized by being arranged in a cooling air flow path leading to a discharge port.   The package type compressor according to claim 1, wherein the fan is an axial flow fan disposed opposite to the oil cooler.   3. The package type compressor according to claim 1, further comprising a guiding unit that guides the cooling air guided along an outer periphery of the drive motor to the exhaust duct.   The intake duct and the exhaust duct communicate with each other to form a series of ducts from the cooling air inlet to the cooling air outlet, and the drive motor and the fan are arranged in the series of ducts. The package type compressor according to any one of claims 1 to 3. The package type compression according to any one of claims 1 to 4, wherein the compressor body is an air compressor, and a suction flow path is provided to extend a suction port of the compressor body to the outside of the package. Machine.

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