JPH08290027A - Gas compression apparatus - Google Patents

Abstract

PURPOSE: To prevent the lowering of the vol. efficiency and compression efficiency of a compressor by reducing the gas bubbles mixed with the lubricant circulating within the system of a gas compression apparatus. CONSTITUTION: In an oil separator 40 separating gas and oil by gravity, a means (metal net 45) finely dividing oil droplets separated to fall is fitted above the surface L of the oil stored in the bottom part of the oil separator 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas compression device for air or the like.

[0002]

2. Description of the Related Art FIG. 2 shows a system diagram of a conventional gas compression device. In FIG. 2, when the compressor 1 is driven by the motor 2, the gas is sucked through the suction strainer 3, compressed by the compression mechanism of the compressor, and discharged to the oil separator 4. The compressed gas discharged from the compressor 1 contains mist-like oil that lubricates the sliding parts such as the compression mechanism inside the compressor 1. Then, since this compressed gas is diffused in the closed container of the oil separator 4, the oil component is separated from the gas by gravity, drops as an oil drop, and is stored at the bottom of the oil separator 4.

The separated lubricating oil passes through a strainer 5 and enters an oil cooler 6, where it is cooled and filtered by a filter 7.
After that, it merges with the intake gas and returns to the compressor 1. On the other hand, the compressed gas from which the oil has been separated is supplied to the user side through the outlet pipe in the upper part of the oil separator.

[0004]

In the above-described conventional gas compression apparatus, the compressed gas discharged from the compressor enters the oil separator, and is released and diffused therein to be contained in the compressed gas in the form of mist. The oil content that is generated is separated from the gas by gravity, and becomes oil drops that fall on the oil surface of the lubricating oil that has accumulated at the bottom of the oil separator. When the oil drops, the oil droplets entrain the surrounding gas, so there is a problem that gas bubbles are mixed in the lubricating oil that is stored in the bottom of the oil separator, and this is returned to the suction side of the compressor. There was a problem that the volumetric efficiency and compression efficiency of the compressor were reduced due to the bubbles of gas contained in.

The present invention is intended to provide a gas compression device which can solve the above problems.

[0006]

According to the present invention, in an oil separator in a gas compression apparatus, a gas inlet and a gas outlet for separating oil are provided in an upper part of a vertically installed closed container, and an oil discharge port is provided in a lower part. , The oil is separated from the gas by the action of gravity, and is located above the oil surface of the separated oil stored in the bottom of the closed container, and is separated into oil droplets after falling to make the oil into a bottom oil. It is characterized in that a fine mesh means such as a wire net or a porous material to be dropped on the surface is provided.

[0007]

In the oil separator according to the present invention, the oil separated from the gas flowing into the separator by the action of gravity becomes an oil droplet and is atomized into small oil droplets while falling in the closed container. And falls on the oil surface at the bottom of the closed container. As a result, the amount of gas that falls into the bottom oil surface when dropped can be reduced, and the bubbles of gas mixed in the oil stored in the bottom of the closed container can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIG. Since the parts other than the oil separator of the air compression device described here are the same as those of the conventional art, duplicate description will be omitted. 1A is a vertical cross-sectional view of the oil separator 40,
(B) is a BB arrow sectional view of (A). In FIG. 1, reference numeral 41 denotes a vertically-closed barrel-shaped hermetic container, in which an air outlet pipe 42 is attached to the ceiling wall, an air inlet pipe 43 is attached to the upper side wall, and an oil discharge pipe 44 is attached to the bottom wall. It is open to. A wire net 45 is provided along the oil surface above the oil surface L of the lubricating oil accumulated at the bottom.

When the compressed air discharged from the compressor is introduced into the oil separator 4 via the air inlet pipe 43, the inflowing compressed air is opened and diffused in the closed container 41. here,
The oil contained as mist in the compressed air is separated from the air by gravity and drops as oil drops. This oil drop
By passing through the wire net 45, it becomes small particles and the closed container 4
The lubricating oil that has accumulated at the bottom of No. 1 falls on the oil surface L.

As described above, when the oil droplets finely divided by the wire net 45 fall on the oil surface L, the amount of air to be entrained is small, and the oil droplets are mixed in the lubricating oil stored in the bottom portion of the closed container 41. It is possible to reduce the air bubbles generated.

In this embodiment, the wire net 45 is used for making the oil droplets fine, but as an alternative to this, a porous material having a large number of small holes through which oil passes can be used.

[0012]

As described above, in the present invention, a fine meshing means such as a wire net or a porous material is provided above the oil level of the separated oil stored in the inner bottom of the closed container of the oil separator. Therefore, the oil separated by the action of gravity from the gas that has flowed into the oil separator hits the above-mentioned atomization means on the way of falling into the inside of the closed container as an oil droplet, and by passing through this, small particles are generated. It becomes an oil drop and falls on the oil surface at the bottom of the closed container.

Since the oil droplets thus miniaturized fall, the amount of gas that is entrained in the oil surface stored in the bottom of the container when it drops onto the oil surface is reduced. It is possible to reduce gas bubbles that are mixed in.

As described above, gas bubbles contained in the oil returned to the suction side of the compressor are reduced, so that the volume efficiency and compression efficiency of the compressor can be prevented from lowering.

[Brief description of drawings]

FIG. 1A is a vertical sectional view of an oil separator according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along the line BB of FIG.

FIG. 2 is a system diagram of a conventional gas compression device.

[Explanation of symbols]

 1 Compressor 2 Motor 3 Strainer 4 Oil Separator 5 Strainer 6 Oil Cooler 7 Filter 40 Oil Separator 41 Airtight Container 42 Air Outlet Pipe 43 Air Inlet Pipe 44 Oil Discharge Pipe 45 Wire Mesh

Claims (2)

[Claims] 1. An oil separator for separating oil contained in a compressed gas to supply only a compressed gas to a user side, and a gas for sucking the oil separated by the oil separator into the compressor. In a gas compression device provided with an oil return system passage for returning to the inside, a gas inlet and a gas outlet are provided at an upper part of the closed container of the oil separator, an oil discharge port is provided at a lower part, and the gas is separated from the gas. A gas compression device, characterized in that it is provided above the oil surface of the oil stored in the bottom portion of the closed container, and has means for atomizing oil drops that separate from the gas and fall. 2. The gas compression device according to claim 1, wherein the miniaturization means is a wire mesh or a porous material.