JP2944488B2 - Package type oil-cooled air compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaged oil-cooled air compressor in which components such as a compressor body are housed in a package.

[0002]

2. Description of the Related Art Conventionally, a package type oil-cooled screw air compressor shown in FIG. 4 is known. The compressor shown in FIG.
Inside the package 1, a compressor main body 2 and an intake section connected thereto and provided with a suction filter 3 and an intake control valve 4 are connected to the compressor main body 2 as well, and an oil separation and recovery device 5, an after cooler 6 and A discharge unit having a dryer 7 and an oil cooler 8 from an oil reservoir (not shown) below the oil separation and recovery device 5.
And an oil supply passage (not shown) extending to the bearing, shaft seal, and rotor chamber of the compressor main body 2 via the pulleys 9, 10, and the belt 11 below the compressor main body 2 and the intake section. A motor 12 for driving a screw rotor (not shown) in the compressor body 2 and a sirocco fan 13 for air blowing mounted on an output shaft of the motor 12 are provided. A partition 14 is provided to separate a space for housing the aftercooler 6, the oil cooler 8 and the sirocco fan 13 from a space for housing other devices.

A part of the air sucked into the package 1 from the air inlet 15 of the package 1 through the sirocco fan 13 flows through the duct 16 toward the suction filter 3 and the motor 12. On the other hand, the rest of the air flows toward the after cooler 6 and the oil cooler 8,
The aftercooler 6 and the oil cooler 8 are cooled and exit from the air outlet 17 on the upper surface of the package 1. The air sucked into the rotor chamber of the compressor main body 2 through the suction filter 3 and the intake adjustment valve 4 is compressed while receiving oil injection from the oil supply passage, and then is discharged from the outlet of the compressor main body 2. From the oil separation and recovery unit 5. In the oil separation and recovery device 5, the compressed air and the oil are separated, and the oil is temporarily stored in the oil storage portion. Further, the oil supplied from the oil supply passage to the bearing and the shaft seal portion is also guided to the oil separation and recovery device 5 from the discharge port. The compressed air separated from the oil in the oil separation and recovery unit 5 is cooled by an aftercooler 6, further cooled by a dryer 7, and sent out of the machine in a dry state. On the other hand, the oil in the oil reservoir is sent again to the oil supply passage, cooled by the oil cooler 8, guided to the bearing, the shaft seal and the rotor chamber, and thereafter circulated in the same manner as described above.

[0004] The temperature of the compressor body 2 and the motor 12 is increased in the portion where the temperature is increased. In contrast, aftercooler 6,
It is necessary to arrange the oil cooler 8 in a place where the temperature is as low as possible. The partition wall 14 thermally separates the compressor body 2, the motor 12, and the oil separation and recovery unit 5, the after cooler 6, and the oil cooler 8 where the temperature rises. The air flowing outside the compressor body 2 and the motor 12 exits from the air outlet 18 on the upper surface of the package 1.

Generally, in this type of apparatus, it is necessary to periodically perform maintenance on at least the suction filter 3, the intake control valve 4, the belt 11, and the like. In addition, the life of the grease of the bearing used in the motor 12 in addition to the compressor body 2 becomes shorter as the operating temperature increases.

[0006]

In the compressor described above,
When the front of the package 1 is opened, there is a dryer 7 which is first screwed, and a suction filter 3, an intake control valve 4, a belt 11 and the like are arranged behind the dryer 7. Therefore, when the maintenance of the suction filter 3 and the like is to be performed, the dryer 7 becomes an obstacle, and it is necessary to move the dryer. The dryer 7 usually weighs 70 to 80 kg and cannot be moved unless lifted using a crane or the like. Therefore, when performing maintenance, package 1
Not only the front surface but also the side surfaces and the upper surface thereof are removed and the dryer 7 is moved, which causes a problem that it takes much time and labor to perform maintenance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a packaged oil-cooled air compressor capable of facilitating maintenance.

[0008]

In order to solve the above-mentioned problems, the present invention provides a compressor body, a suction filter, and an air intake control valve in a package, and an air intake section connected to the compressor body. An oil separator / collector, an aftercooler and a dryer, and a discharge portion connected to the compressor body; and an oil cooler. An air supply passage leading to the section and the rotor chamber, a motor for driving the compressor body via a pulley and a belt, and a blast for flowing air into and out of the package while passing through a heating section in each section. In a package type oil-cooled air compressor containing a fan for the compressor, the dryer disposed on the front side of the compressor body and the intake adjustment valve inside the package is provided at the bottom corner of the package. Around the digit pin formed by rotatably to the outside of the package.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a package type oil-cooled air compressor according to the present invention, for example, a screw type compressor. Portions common to the compressor shown in FIG. I do. In this compressor, a space accommodating the aftercooler 6, the oil cooler 8 and the sirocco fan 13 and a space accommodating other devices such as the compressor main body 2 are separated by a partition wall 14 as shown in FIG. Similar to the machine, but with an air inlet 15
A suction filter 3 is provided in a space extending from the suction filter 3 to the sirocco fan 13, and air sucked from the suction filter 3 by the duct 19 is guided to the intake adjustment valve 4. Then, instead of air whose temperature has risen due to heat generated by the compressor body 2, the motor 12, etc., cold outside air is sucked into the compressor body 2 via the suction filter 3 and the intake adjustment valve 4, thereby improving the suction efficiency of the compressor body 2. It has become.

Further, by providing the suction filter 3 not at the interior of the package 1 but at the place where the air inlet 15 is inserted, maintenance of the suction filter 3 becomes easy.
The space from the air inlet 15 to the sirocco fan 13 is necessary to minimize noise generated inside the package 1 from leaking to the outside. That is, if an air inlet is provided immediately to the right of the sirocco fan 13 in FIG. 1, noise is likely to leak. In this compressor, a suction filter 3 is provided in this space, and this space is effectively used. As a result, the intake adjustment valve 4
In comparison with the case where the suction filter 3 is provided at the location of FIG.
In the compressor shown in (1), the number of devices around the compressor body 2 is reduced, and it is possible to make the compressor more compact.

Further, in this compressor, a corner on the front side of a gantry 21 on which the dryer 7 is mounted is attached by pins 22. Then, as shown by a two-dot chain line in FIG. 3, the front cover of the package 1 is opened, and other bolts fixing the gantry 21 are removed. It is rotatable toward the direction. As a result, when performing maintenance of the intake adjustment valve 4, the belt 11, etc., the front and both sides of the package 1 are removed, and the heavy dryer 7 is lifted by, for example, a plurality of operators or using a crane. The maintenance work can be performed very easily.

Further, in this compressor, the motor 12 is of a fully-closed external fan type, and is cooled by air flowing from an air inlet 23 on the left side of the package 1 in FIG. However, the main cooling by the air is the left bearing in the motor 12 and the casing of the motor 12 shown in FIG. 1, and the right bearing of the motor 12 is not cooled much. In order to improve the durability of the belt 11, it is necessary to cool the belt 11.
In this compressor, a duct 24 is provided from the lower space of the sirocco fan 13 to the lower space of the pulley 9, and cool air from the air inlet 15 is guided to the lower space of the pulley 9. Bearing part and belt 11
Is formed so as to be cooled. The life of the grease of the bearing and the belt 11 is extended. In the drawing, reference numeral 25 denotes a discharge pipe for sending dry compressed air from the dryer 7 to the user side, and reference numeral 26 denotes a drain pipe for discharging water deposited in the dryer 7;
Indicates a control unit.

[0013]

As is apparent from the above description, according to the present invention, the package includes a compressor body, a suction filter, and an intake control valve. A discharge unit connected to the compressor main body, including a separator / collector, an aftercooler, and a dryer; and an oil cooler, and a bearing and a shaft seal in the compressor main body from an oil reservoir at a lower portion of the oil separator / collector. And an oil supply passage to the rotor chamber, a motor for driving the compressor main body via a pulley and a belt, and a blower for flowing air into and out of the package while passing through a heating section in each of the sections. In a package type oil-cooled air compressor containing a fan, the dryer disposed on the front side of the compressor body and the intake adjustment valve inside the package is provided at a corner at the bottom of the package. About the pin are formed by rotatably to the outside of the package.

Therefore, maintenance of the compressor, particularly maintenance of the intake control valve, the belt, etc., becomes extremely easy and can be performed in a short time. In addition, even when the rear surface of the package is installed in close contact with the wall surface of the room, the maintenance can be easily performed from the front side of the package.

[Brief description of the drawings]

FIG. 1 is a front view of the inside of a packaged oil-cooled air compressor according to the present invention.

FIG. 2 is a right side view of the inside of the packaged oil-cooled air compressor shown in FIG.

FIG. 3 is a plan view of the packaged oil-cooled air compressor shown in FIG.

FIG. 4 is a front view of the inside of a conventional packaged oil-cooled air compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Package 2 Compressor main body 3 Suction filter 4 Intake adjustment valve 5 Oil separation and recovery unit 6 Aftercooler 7 Dryer 8 Oil cooler 9 Pulley 10 Pulley 11 Belt 12 Motor 13 Sirocco fan 22 Pin

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaki Matsukuma 41 Niijima, Harima-cho, Kako-gun, Hyogo Pref. JP-A-5-316614 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04C 23/00-29/10 331 A47B 49/00 503 A47B 88/18 H02B 3/00

Claims (1)

(57) [Claims] A compressor body, a suction filter, and an intake regulating valve, a suction part connected to the compressor body, an oil separation / collection unit, an aftercooler, and a dryer, wherein the compressor body is provided in the package. And an oil cooler, and an oil supply passage extending from an oil reservoir at a lower portion of the oil separator / collector to a bearing, a shaft seal, and a rotor chamber in the compressor body, and a pulley and a belt. A package-type oil-cooled air compressor that houses a motor that drives the compressor main body and a blower fan that allows air to flow in and out of the package while passing through a temperature-raising section of each section. The dryer disposed in front of the compressor body and the intake adjustment valve inside the package is turned toward the outside of the package around a pin provided at a corner at the bottom of the package. A package type oil-cooled air compressor characterized by being rotatably provided.