JP2001289168A - Blow-off device for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blow-off device for a turbo compressor capable of silencing a blow-off sound even eliminating necessity for providing a large-sized silencer and preventing sticking of dust due to adherence of drain water to a suction filter. SOLUTION: This device is constituted so that a blow-off pipe 11 connecting one end side to a low temperature side of an after cooler 8 is made to communicate with a blow-off port 4a of a suction regulating valve 4 provided in the downstream of a suction filter 2, a blow-off end pipe 12 connecting one end side to the blow-off port 4a of the suction regulating valve 4 is made to communicate with a silencing space 14 formed in an installation base 13 installing a motor M, blown-off compressed air is allowed to flow in the above silencing space 14 through the blow-off pipe 11 and the blow-off end pipe 12 of the blow- off port 4a, and also compressed air in the silencing space 14 is exhausted from an exhaust port 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for a compressor, and more particularly to a blower for suppressing a blown sound without providing a large-sized silencer, and for enabling a compact compressor. It belongs to the technical field of a blower for a compressed compressor.

[0002]

2. Description of the Related Art In recent years, customer needs for a compact turbo compressor have been increased. However,
In order to prevent surging in the turbo compressor, a large silencer is installed at the end of the air blowing line that blows out the compressed gas discharged from this turbo compressor to muffle the blowing sound. Met. Therefore, in order to make the turbo compressor a little compact, for example, in Japanese Unexamined Patent Application Publication No. 8-121398, without providing a large-sized silencer, the blow-out sound of the compressed gas is reduced, and the turbo compressor is made more compact. There has been proposed a blower that makes it possible to achieve the above.

The outline of the blower of the turbo compressor according to the conventional example will be described below with reference to FIGS. 3A and 3B of a flow chart showing the turbo compressor and the blower, and details of part B in FIG. 3A. Figure 3
(B) will be described with reference to the same names and the same reference numerals described in the same gazette. The “blow-off device for a turbo compressor” according to this conventional example will be described. A suction filter 14 is provided at the suction port 4a, and a discharge line 16 for preventing surging is connected to a discharge line 7 connected to the discharge port 6 of the turbo compressor 5.

According to the blower of the turbo compressor according to the conventional example, as shown in FIG.
A body 19 made of a pipe smaller than the inner diameter of the air blowing line 16 is inserted into the opening of the cut portion of the air blowing line 16 on the side, and then a plurality of flanges 21 and flange joints 23 and 24 are penetrated. Attach the bolt 26 and secure these bolts 2
6 is screwed and fastened to each of the nuts 25, whereby the blow-off line 16 a on the suction valve 3 side and the blow-off line 16 b on the blow-off valve 15 side are integrated, and the diffuser is connected to the blow-off line 16. 18 are integrated, the turbo compressor 5
Can be made more compact.

[0005]

Incidentally, in the case of the blower of the turbo compressor according to the conventional example, the compressed gas is blown from a blower tube connected to the low-temperature side of the aftercooler. However, as is well known, drain water always exists on the low-temperature side of the aftercooler.

[0006] Therefore, according to the blower of the turbo compressor according to the conventional example, drain water accompanies the compressed gas blown from the air discharge pipe, and the drain water accompanying the compressed gas adheres to the suction filter. Resulting in. As a result, a large amount of dust adheres to the suction filter, so that filter performance is reduced and suction resistance is increased. Therefore, the suction filter must be replaced much more frequently than in a normal case, so that not only the maintenance cost is increased but also the operation rate of the turbo compressor is reduced.

Accordingly, the object of the present invention is to
An object of the present invention is to provide a compressor blower which can make the compressor compact and which does not adversely affect the filter performance of the suction filter even if the compressed gas mixed with drain water is blown.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is, therefore, characterized by the means employed by the blower of the compressor according to claim 1 of the present invention. However, an intake adjustment valve is provided on the downstream side of the suction filter, and an exhaust pipe is provided on the discharge port side of the compressed gas so as to communicate with the air outlet of the intake adjustment valve. In the blower of the driven compressor, a muffling space having an exhaust port is formed inside the installation table, and the muffling space of the air intake control valve is communicated with the muffling space.

According to a second aspect of the present invention, there is provided a blower for a compressor according to the first aspect, wherein the blower for a compressor according to the second aspect of the present invention has an inner surface of a silencing space of the installation stand. Are provided with a plurality of partition walls, and a gas flow passage from the communication port with the air discharge port to the exhaust port is bent.

According to a third aspect of the present invention, there is provided a blower for a compressor according to any one of claims 1 and 2, which is characterized by the means employed by the blower for a compressor. Wherein the inner surface of the sound deadening space of the installation stand is covered with a sound absorbing material.

According to a fourth aspect of the present invention, there is provided a compressor blower according to the fourth aspect of the present invention. In the wind device, the installation base is a cast product.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a blower for a compressor according to a first embodiment of the present invention will be described with reference to FIG. The case where the compressor is a single-stage turbo compressor will be described as an example.

Reference numeral 1 shown in FIG. 1 is a two-stage turbo compressor, and reference numeral 10 is a blower. First, the configuration of the two-stage turbo compressor 1 will be described. Air, which is the suction gas sucked through the suction filter 2, is provided by an air suction valve provided with a suction port 4a having an air outlet 4a. It is sucked into the first stage compressor 5 from the pipe 3 and is compressed by the first stage compressor 5 in one stage.

Compressed air, which is compressed gas that has been subjected to one-stage compression and discharged from the discharge port of the first-stage compressor 5, is cooled by the intercooler 6 and flows into the second-stage compressor 7, where
Two-stage compression is performed by the stage compressor 7. The compressed air compressed in the second stage by the second stage compressor 7 is cooled by the aftercooler 8 and supplied to the supply destination side from a discharge pipe 9 provided in the aftercooler 8. . The first-stage compressor 5 and the second-stage compressor 7 are rotated at an increased speed by a speed increaser (not shown) driven by a motor M which is a drive source installed on an installation base 13 described later. It is configured as follows.

Next, the structure of the blower 10 of the two-stage turbo compressor 1 will be described. This blower 10 has one end connected to the low temperature side of the aftercooler 8 and the other end connected to the low temperature side. A blow-off pipe 11 communicating with the blow-out port 4a of the intake adjustment valve 4, a blow-off pipe 12 communicating from the blow-out port 4a to the installation base 13, and a silencing space 14 formed in the installation base 13; , And an exhaust port 15 for communicating the silencing space 14 with the atmosphere.

Incidentally, in order to further enhance the sound deadening effect of the sound deadening space 14, it is preferable to cover the inner surface (front and rear left and right walls, ceiling and lower surface) of the sound deadening space 14 with a sound absorbing material. Incidentally, the noise reduction effect when the inner surface of the silencing space 14 is not covered with the sound absorbing material is about 10 dB (A), whereas the inner surface of the silencing space 14 is covered with a sound absorbing material such as glass wool. 20dB (A)
There was a degree of noise reduction effect. Note that this silencing space 14
When the inner surface of the sound absorbing material is covered with the sound absorbing material, a work hole for disposing the sound absorbing material in the sound deadening space 14 is provided on the installation base 13.
The work hole may be closed after the installation work is completed.

The mounting table 13 may be a canned product, but is preferably a cast product from the viewpoint of manufacturing costs. In other words, the manufacturing cost of the mounting table, which is a can-making product having a normal configuration, and the manufacturing cost of the mounting table 13, which is a casting product, in which the sound deadening space 14 is formed, are almost the same.
This is because it has been found that there is no increase in cost due to the formation of the silencing space 14.
And, as the structure of the sound deadening space 14 of the installation base 13 becomes more complicated, the installation base made of a cast product becomes more advantageous in cost than the installation base made of a can-made product. Also, since cast products have better vibration absorption performance than can products,
There is also an effect that vibration during operation of the turbo compressor can be reduced.

Hereinafter, the blower 1 according to the first embodiment will be described.
0, the compressed air blown from the aftercooler 8 passes through the blow-off pipe 11, the blow-out port 4a of the intake adjustment valve 4, and the blow-off pipe 12, and then silences inside the installation table 13. It flows into the space 14. Since the sound is silenced here and is discharged from the exhaust port 15, even if the compressed air to be blown is accompanied by the drain water, the drain water does not adhere to the suction filter 2 for a predetermined time. Since the filter performance is maintained, the suction filter does not need to be replaced frequently as in the blower according to the conventional example, and the operation rate of the turbo compressor 1 does not decrease.

Of course, the blow-off sound of the compressed air can be suppressed without providing a large-sized silencer, so that the turbo compressor 1 can be made compact as in the blow-off device according to the conventional example.

Next, a blower for a two-stage turbo compressor according to Embodiment 2 of the present invention will be described with reference to the plan view of FIG. FIG. 2 (b) showing a cross-sectional view along the line A.
And FIG. 2C, which is a view of the main part of the mounting base viewed from below, will be described. However, the second embodiment differs from the first embodiment in the difference in the configuration of the mounting table, and the other configurations are completely the same. The differences will be described.

That is, in the blower of the two-stage turbo compressor according to the second embodiment, a predetermined interval is provided between the tip and the other inner wall surface on the inner wall surface of the sound deadening space 14 of the mounting base 13. A plurality of separated partition walls 14a are provided, and the air flow path 1 is a gas flow path from the blow-off pipe communication port 14b, to which the blow-off pipe having one end connected to the blow-out port 4a, communicates.
By bending the air passage 4c, the air flow passage 14c is lengthened to further enhance the noise reduction effect.

FIG. 2 (a) shows an upper surface of the mounting table 13.
As shown in the figure, a rectangular hole 14d is provided,
The work of covering each surface in the sound deadening space 14 and both side walls of each partition wall 14a with the sound absorbing material can be performed from the hole 14d. The hole 14d is closed by a mounting plate (not shown) of the motor. Even if each surface in the sound deadening space 14 and both side walls of each partition wall 14a are not covered with the sound absorbing material, a certain sound deadening effect can be expected.

According to the blower according to the second embodiment, even if the discharged compressed air is accompanied by drain water,
Since the drain water does not adhere to the suction filter and dust does not adhere to the attached drain water, the viewpoint of reducing the operating rate of the turbo compressor is the same as in the first embodiment. And since the air flow passage 14c formed in the silencing space 14 is long, it is superior in the silencing effect to the air blower according to the first embodiment. Of course, the blow-off sound of the compressed air can be suppressed without providing a large-sized silencer, so that the turbo compressor can be made compact as in the blow-off device according to the conventional example.

In the above, the case where the compressor is a two-stage turbo compressor has been described as an example. However, the present invention is not limited to a two-stage turbo compressor, but may be applied to a one-stage or three-stage compressor or more. Since the technical idea of the present invention can be applied, the scope of application of the technical idea of the present invention is not limited by the first or second embodiment.

[0025]

As described above, in the blower for a compressor according to the first to fourth aspects of the present invention, a silencing space having an exhaust port is formed inside the installation table, and The air outlet and the muffling space communicate with each other.

Therefore, according to the blower of the compressor according to claims 1 to 4 of the present invention, the blown compressed gas passes through the blower pipe and the blowout opening of the intake control valve, and the noise reduction space in the installation table. Into the air, where it is silenced and discharged from the exhaust port, but even if drain water accompanies the compressed gas that is blown off,
No drain water adheres to the suction filter,
Since the filter performance is maintained for a predetermined time, the suction filter does not need to be replaced frequently as in the blower according to the conventional example, and the operating rate of the compressor does not decrease. Further, since the blowing sound of the compressed air can be suppressed without providing a large-sized silencer, there is an effect that the turbo compressor can be made compact as in the blowing device according to the conventional example.

According to the blower of the compressor according to the second aspect of the present invention, a plurality of partition walls are provided on the inner surface of the muffling space of the installation stand, and a plurality of partitions are provided from the communication opening with the blower opening to the exhaust opening. Since the gas flow passage is bent and the gas flow passage is elongated, the sound deadening effect is superior to that of the blower of the compressor according to the first aspect.

According to the blower of the compressor according to the third aspect of the present invention, since the inner surface of the sound deadening space of the installation base is covered with the sound absorbing material, a more excellent sound deadening effect can be exhibited. effective.

According to the blower of the compressor according to the fourth aspect of the present invention, the more complicated the structure of the sound deadening space, such as providing a partition wall in the sound deadening space in the installation table, the lower the cost. This is advantageous in that it is more advantageous than the manufacturing cost of an installation stand that becomes a can-made product.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a turbo compressor and a blower according to Embodiment 1 of the present invention.

2 (a) is a plan view of a main part of a mounting table, and FIG. 2 (b) is a sectional view taken along line AA of FIG. 2 (a), according to Embodiment 2 of the present invention. FIG. 2 (c) is a view of the main part of the mounting table viewed from below.

FIG. 3A is a flow chart showing a turbo compressor and a blower according to a conventional example, and FIG.
It is a B section detailed figure of (a).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Two-stage turbo compressor, 2 ... Suction filter, 3 ... Air suction pipe, 4 ... Intake adjustment valve, 4a ... Outlet, 5 ... First stage compressor, 6 ... Intercooler, 7 ... Second stage compression Machine, 8 aftercooler, 9 discharge pipe, 10 blower device, 11 blower pipe, 12 blower tip pipe, 13 installation base, 14 noise reduction space, 14a partition wall, 14b blower Front pipe communication port, 14c
... air flow passage, 14d ... hole, 15 ... exhaust port, M ... motor.

Claims (4)

[Claims] 1. A drive device mounted on a mounting table, comprising: an intake adjustment valve downstream of an intake filter; and an exhaust pipe communicating with a discharge port of the intake adjustment valve on a discharge port side of the compressed gas. In a blower of a compressor driven by a source, a muffling space having an exhaust port is formed inside the installation table, and the baffle port of the intake adjustment valve communicates with the muffling space. Compressor blower. 2. A gas flow passage from a communication port with the air discharge port to the exhaust port is provided by providing a plurality of partition walls on an inner surface of a sound deadening space of the installation table.
A blower for a compressor according to item 1. 3. The air blower for a compressor according to claim 1, wherein an inner surface of the sound deadening space of the installation stand is covered with a sound absorbing material. 4. The blower for a compressor according to claim 1, wherein the mounting table is a cast product.