JPH1030594A - Air-cooling package type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-cooling package type compressor which can improve cooling efficiency of a motor for driving a compressor body, suppressing a temperature rise in a motor coil, bearing or grease and the service life thereof. SOLUTION: This compressor contains a compressor body 5, a totally-closed external-fan type motor 9 for driving the compressor body 5, and an oil separating & recovering device 10 in the first chamber 3 of a package 1, and contains a multi-blade fan 16 mounted onto a main shaft 15 of the motor 9, an oil cooler 11 and an after-cooler 12 in the second chamber 4. This compressor is constituted so that air sucked from the first air inflow opening 18 may be sucked by the multi-blade fan 16 from an opening part 17 and may be delivered from an air outflow opening 20 with air sucked by the multi-blade fan 16 through the second air inflow opening 19. The opening part 17 is formed at the circumference of the main shaft 15, which penetrates through a partition plate 2, and a duct 22 is formed between a cooling fan 21 for the motor 9 and the first air inflow opening 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled package type compressor in which the entire apparatus is housed in a package.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, an air-cooled package type compressor in which the entire apparatus is accommodated in a package 31 has been known (Japanese Patent Application Laid-Open No. 1-3313694). The interior of this package 31 is partitioned by a partition plate 32 into a first chamber 33.
And a second chamber 34. The first chamber 33 includes a compressor body 35, a fully-closed outer fan-shaped motor 39 that drives the compressor body 35 via pulleys 36 and 37, and a belt 38, and an oil separator (oil). (Separation and recovery device) 40 is provided. In the second chamber 34, a multi-blade fan (generally, a sirocco fan (trademark)) mounted on a main shaft 44 of a motor 39 penetrating the oil cooler 42, the after cooler 43 facing the second air inlet 41, and the partition plate 32. ) 45)
Is provided. Further, a first air inlet 46 is formed on the side surface of the first chamber 33 of the package 31, an air outlet 47 is formed on the upper surface of the second chamber 34, and a vent 48 is formed on the partition plate 32.

[0003] The air introduced from the first air inlet 46 is guided by the cooling fan 49 attached to the motor 39 to the second chamber 34 through the vent 48 while being cooled, so that the motor 39 and the like are cooled. Has become. Also,
The multi-blade fan 45 allows air to flow from the second air inlet 41 through the oil cooler 42 and the aftercooler 43, thereby cooling the oil cooler 42 and the aftercooler 43, as well as the air that has flowed and the first chamber 33. The air that has flowed in through the ventilation port 48 is sent out of the machine from the air outlet 47.

Further, as shown in FIG. 6, there is known an air-cooled package type compressor in which the inside of a package 52 is partitioned by a partition plate 51 in the same manner as described above (Japanese Patent Publication No. 7-74636). In this compressor, one first chamber 53 of the partition plate 51 is provided.
Is provided with a compressor main body 54, a compressor motor 55 for driving the compressor main body 54, and an oil separation and recovery unit 56.
In the first chamber 53, a double suction multi-blade fan 60 and a fan motor 61 for driving the multi-blade fan 60 are provided at a position lower than the main shaft 59 of the motor 55 supported by bearings 57 and 58. It is. Further, the partition plate 51
The other second chamber 62 is provided with a cooler 63 facing a second air inlet (not shown). On the other hand, package 52
A first air inlet 64 is provided on the side surface of the first chamber 53, an air outlet 65 is provided on the upper surface, and a multilateral fan 60 is provided on the partition plate 51.
A ventilation port 66 is formed to communicate with the suction port on the second chamber 62 side.

[0005] The air that has flowed in from the first air inlet 64 flows into the suction port 67 of the multiblade fan 60 on the side of the first chamber 53 through the motor 55 and the like.
5 and the like, and the cooler 63 is cooled by flowing air from the second air inlet through the cooler 63 into the suction port on the second chamber 62 side of the multi-blade fan 60. Thus, the air that has flowed into the multi-blade fan 60 from both sides is discharged by the multi-blade fan 60 to the air outlet 65.
Is sent out of the aircraft.

[0006]

In the compressor shown in FIGS. 4 and 5, the air introduced from the first air inlet 46 is caused to flow by the fan 49 to cool the motor 39 and the like. A problem arises because the vent 48 is formed at a position away from the main shaft 44. That is, the air sent out by the fan 49 is supplied to the right bearing 71 in FIG.
Most of the flow flows as indicated by the arrow A in FIG. 5, and flows at a position deviated from the bearing 72 on the left side in FIG. Therefore, even though the bearing 71 and the motor coil are cooled by the air sent out by the fan 49, the bearing 72
Is hardly cooled, and the peeling life and grease life of the bearing 72 are shortened. This phenomenon becomes more pronounced as the size of the device increases. In addition, as shown by an arrow B in FIG. 4, the air whose temperature has increased after cooling the motor is sucked in by the fan 49 again and sent out, so that the cooling efficiency of the motor 39 is reduced. Bad, motor coil,
Not only the bearing 72 but also the bearing 71 is insufficiently cooled.

[0007] In the compressor shown in FIG.
0 of the main shaft 53 of the motor 55
9, the air that has flowed in from the first air inlet 64 does not flow along the outer peripheral surface of the motor 55, but descends as it approaches the suction port 67, and flows away from the main shaft 59. Go on. For this reason, similarly to the above, even if the right bearing 57 in FIG. 6 is cooled, the left bearing 58 is insufficiently cooled, and the same problem as described above occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has an object to improve the cooling efficiency of a motor for driving a compressor body, suppress a temperature rise of a motor coil, a bearing, and grease. It is an object of the present invention to provide an air-cooled package type compressor capable of extending the life of a motor coil, a bearing, and grease.

[0009]

According to a first aspect of the present invention, a compressor main body and a compressor main body are driven in a first chamber on one side of a partition plate that divides the inside of a package into two parts. A fully enclosed outer fan-shaped motor driven via a pulley, a driven pulley, and a belt, and an oil separation and recovery unit are accommodated.
A second fan on the other side of the partition plate houses a blower fan, an oil cooler, and an aftercooler attached to an end of a main shaft of the motor extending through the partition plate, and a side wall of the first chamber. The air sucked from the first air inlet formed in the portion is sucked into the blower fan through the opening formed in the partition plate, and is sucked into the blower fan through the second air inlet formed in the second chamber. The second with the air
In the air-cooled package compressor delivered from an air outlet formed in a chamber, the opening is formed around the main shaft passing through the partition plate, and the cooling fan of the motor and the first air inlet are formed. And a duct for flowing only the air flowing from the first air inlet.

According to a second aspect of the present invention, the rib of the driving pulley is formed in the shape of a blade that sucks air from the side of the motor.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show an air-cooled package type compressor according to the first invention, for example, an air-cooled package type screw compressor. The interior of a package 1 housing the entire apparatus is divided into a first chamber 3 and a second chamber by a partition plate 2. And four. The first chamber 3 includes a compressor main body 5, a fully-closed outer fan-shaped motor 9 that drives the compressor main body 5 via a driving pulley 6, a driven pulley 7, and a belt 8, and a gas discharged from the compressor main body 5. An oil separation / recovery device 10 is provided to separate oil and temporarily hold the separated oil. The second chamber 4 is provided with an oil cooler 11 for air-cooling the oil guided from the oil separation / collection unit 10 to the lubrication point in the compressor body 5, and is separated from the oil by the oil separation / collection unit 10 and then sent out of the machine. And a main shaft 15 supported by bearings 13 and 14 of the motor 9 that penetrates through the partition plate 2 and protrudes into the second chamber 4.
And a double suction multi-blade fan 16 attached to the end of the fan.

The partition plate 2 is formed with a through hole having a diameter larger than the diameter of the main shaft 15.
Penetrates this through hole, and between the main shaft 15 and the partition plate 2,
An annular opening 17 is provided. On the other hand, the side of the first chamber 3 of the package 1 has a first air inlet 1
8, a second air inlet 19 is formed on the side surface of the second chamber 4, and an air outlet 20 is formed on the upper surface. A duct 22 is provided between the cooling fan 21 of the motor 9 and the first air inlet 18 so that the fan 21 sucks air only through the first air inlet 18, that is, only from outside the package 1. .

The multi-blade fan 16 is provided with a second
The duct 23 is accommodated in a duct 23 provided on the chamber 4 side, and the duct 23 has an opening 24 at a portion of the multi-blade fan 16 facing the suction port on the second chamber 4 side. Then, the air sucked from the first chamber 3 through the opening 17 by the multi-blade fan 16 and the air sucked from the second chamber 4 through the opening 24 are reliably sent to the oil cooler 11 by the duct 23.
The air is led to the air outlet 20 via the aftercooler 12.

With this configuration, in this compressor, the cool air flowing from the first air inlet 18 by the fan 21 flows along the outer peripheral surface of the motor 9 to the drive pulley 6 and further moves away from the main shaft 15. Opening 1 without
7 That is, only the cool air from the outside flows along the outer periphery of the motor 9 to efficiently cool the motor 9 and sufficiently cool not only the bearing 13 but also the motor coil and the bearing 14, and the motor coil, the bearing and the grease are cooled. Has a longer lifespan. Further, the cooled air is sucked by the multi-blade fan 16 from the opening 17 without returning to the fan 21, and cools the oil cooler 11 and the aftercooler 12 together with the air from the opening 24.
The air is sent out from the air outlet 20.

FIG. 3 shows a drive pulley 6a of the air-cooled package type compressor according to the second invention. This compressor is the same as the air-cooled package type compressor according to the first invention except for the drive pulley 6a. It is. As shown in the drawing, the drive pulley 6a has a rib 25 formed in the shape of a blade that sucks air from the motor 9 side. By using the drive pulley 6a, the air flow along the main shaft 15 from the outer periphery of the motor 9 to the opening 17 is strengthened, and the cooling efficiency of the motor 9 is further improved. The installation position of the oil cooler 11 and the after cooler 12 may be any position between the paths of the flowing air from the second air inlet 19 to the air outlet 20. Each of the above-described inventions is limited to the above-described embodiment. It does not do.

[0016]

As is apparent from the above description, according to the first aspect, the compressor main body and the compressor main body are driven in the first chamber on one side of the partition plate that divides the inside of the package into two. The above-described motor that houses a fully-closed outer fan-shaped motor driven via a pulley, a driven pulley, and a belt, and an oil separation / recovery device, and extends through the partition plate into the second chamber on the other side of the partition plate. The fan accommodates a blower fan, an oil cooler, and an aftercooler attached to the end of the main shaft, and receives air sucked from a first air inlet formed in a side wall of the first chamber through an opening formed in the partition plate. In the air-cooled package compressor, which is sucked into the blower fan and is sent out from an air outlet formed in the second chamber together with air sucked into the blower fan through a second air inlet formed in the second chamber, the above An opening is formed around the main shaft, through which the main shaft passes through the partition plate, and allows only the air flowing from the first air inlet to flow between the cooling fan of the motor and the first air inlet. A duct is provided.

Therefore, the cooling efficiency of the motor driving the compressor body is improved, the temperature rise of the motor coil, bearing, and grease is suppressed, and the life of the motor coil, bearing, and grease can be extended. Play.

According to the second invention, the rib of the driving pulley is formed in the shape of a blade for sucking air from the motor side.

Therefore, there is an effect that the air flow along the main shaft from the outer peripheral surface of the motor to the blower fan is strengthened, and the cooling efficiency of the motor can be further improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the overall configuration of an air-cooled package type compressor according to a first invention.

FIG. 2 is a cross-sectional view of the compressor of FIG. 1 cut in a lateral direction.

FIG. 3 is a front view showing a drive pulley of the air-cooled package type compressor according to the second invention.

FIG. 4 is a cross-sectional view showing the overall configuration of a conventional air-cooled package type compressor, which is cut in a lateral direction.

FIG. 5 is a vertical sectional view of the compressor shown in FIG. 4;

FIG. 6 is a diagram showing an overall configuration of another conventional air-cooled package type compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Package 2 Partition plate 3 1st chamber 4 2nd chamber 5 Compressor main body 6, 6a Drive pulley 7 Driven pulley 8 Belt 9 Fully-closed outer fan-shaped motor 10 Oil separation and recovery unit 11 Oil cooler 12 Aftercooler 13, 14 Bearing 15 Main shaft 16 Both Suction multiblade fan 17 Opening 18 First air inlet 19 Second air inlet 20 Air outlet 21 Cooling fan 22 Duct 25 Rib

Claims (2)

[Claims] 1. A compressor body, a fully-closed outer fan-shaped motor for driving the compressor body via a driving pulley, a driven pulley, and a belt, in a first chamber on one side of a partition plate that divides the inside of the package into two. , An oil separation and recovery unit, and a fan for blowing air, an oil cooler, and an aftercooler attached to an end of a main shaft of the motor extending through the partition in the second chamber on the other side of the partition. And the air sucked from the first air inlet formed in the side wall of the first chamber is sucked into the blower fan through the opening formed in the partition plate, and the second air formed in the second chamber is formed. (2) In an air-cooled package compressor which sends out air from an air outlet formed in the second chamber together with air sucked into the blower fan through an air inlet, the opening is formed around the main shaft through which the main shaft passes through the partition plate. To An air-cooled package type compressor, wherein a duct is formed between the cooling fan of the motor and the first air inlet to flow only air flowing from the first air inlet. 2. The air-cooled package type compressor according to claim 1, wherein the rib of the driving pulley is formed in a shape of a blade that sucks air from a side of the motor.