JPS6110734Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an oil separation device mainly used in combination with a compressor.

Generally, in a rotary compression type compressor,
Oil is injected into the compression chamber and rotating parts for cooling and lubricating the air, and this oil is discharged mixed with the air compressed by the compressor. Therefore, when using compressed air, it is necessary to separate the oil in the compressed air, and the conventional separation equipment for this purpose is
A grit method is used. This device is designed to separate oil by passing compressed air through the filter element, but since the perforated plate (grit) that holds the filter element in place is a flat plate, when it receives pressure from the compressed air, the filter element It has a slightly concave shape, and a gap is created between the peripheral end of the filter element and the casing, which has the drawback of reducing the oil separation rate due to air leakage.

This idea was made in order to eliminate the above-mentioned drawbacks, and the perforated plate holding the filter element is compressed so that there is no gap between the filter element and the casing even when the filter element receives the pressure of compressed air. The gist of this is that it is curved to form a convex surface with respect to the air flow.

Hereinafter, one embodiment of this invention will be explained in detail with reference to the drawings. Reference numeral 1 denotes a casing, an inlet pipe 2 is attached near the closed end, and a cover lid 3 is fixed to the open end. An outlet pipe 4 is attached to the central part. Reference numeral 5 designates a partition plate fixed to a ring-shaped spacer 6, which has an introduction pipe 5a that slopes downward, and is installed in the casing 1 together with the spacer 6 so that a pre-chamber 7 is formed near the closed end of the casing 1. There is. Reference numeral 8 denotes a ring-shaped spacer, and a swash plate 8a is provided so as to cover almost the upper half of the spacer, and is attached to the center of the casing 1 and the end on the cover lid 3 side, respectively. Reference numeral 9 denotes a filter element made of glass wool and formed into a disk shape, and is held on both sides by a presser member having a pad 11 made of coarse wool sandwiched between two perforated plates 10, so that the spacer 6 and the spacer 8 and between this spacer 8 and the spacer 8 at the end. in this case,
The holding member located on the side of the spacer 8 at the end of the casing has a perforated plate 10' formed in a curved manner in advance.
The entire surface is convex toward the inside of the casing 1. Therefore, the filter element in contact with this perforated plate 10' and the filter element adjacent thereto have a convex shape. A return pipe 12 is attached to the flange portion of the casing 1 and communicates with the inside of the casing 1 (the inside of the spacer 8) via a notched groove 8b formed in the lower part of the spacer 8. A return pipe 13 is also attached to the lower part of the pre-chamber 7.

The oil separator according to this invention is constructed as described above, and when air compressed by a compressor is introduced into the casing 1 from the inlet pipe 2, the oil contained in the air is separated and a clean oil is produced. Air is led out from the outlet pipe 4. That is, from the inlet pipe 2 to the casing 1
The oil-containing compressed air introduced into the chamber is first accompanied by a change in flow velocity in the pre-chamber 7, and large oil droplets are separated therein and recovered by the return pipe 13, and the air containing fine oil particles is passed through the introduction pipe. 5
It flows into the next separation layer from a. The compressed air that has flowed in in this way passes through the part 11 and filter element 9 via the perforated plate 10, where oil is separated and further separated by the latter part and element, producing clean compressed air. It is led out from the outlet pipe 4. In this case, in the secondary side (second half) separation layer, the perforated plate 10' is curved so as to have a convex surface with respect to the flow direction of the compressed air, so that the convex filter element is pushed by the compressed air. A force acts to expand the diameter of the filter element and spread it outward, and the peripheral end of the filter element adheres more tightly to the inner surface of the casing 1, so that no gap is created between the filter element and the inner surface of the casing, thereby preventing air from blowing through. This can significantly improve oil separation efficiency. Note that when the swash plate 8a of the spacer 8 is hit by compressed air, it acts to capture oil and cause it to fall as oil droplets.
b flows into the return pipe 12 and is collected.

As explained above, in this invention, in an oil separator, the perforated plate at the outlet of the secondary side is formed in a curved manner so as to have a convex surface with respect to the flow of compressed air. The peripheral edge of the can be tightly attached to the casing,
Since there are no gaps, air can be prevented from blowing through, and oil can be separated reliably. Therefore, according to this invention, the performance of the oil separator can be improved and clean compressed air can be obtained, which is extremely convenient for use. In addition, in the above example, 2
Although only the perforated plate on the next side is formed in a curved manner, the perforated plate on the primary side outlet may also be curved (indicated by imaginary lines in the figure).

[Brief explanation of the drawing]

The drawing is a sectional view of essential parts showing one embodiment of this invention. 1...Casing, 2...Inlet pipe,
3...Cover lid, 4...Outlet pipe, 5
... Partition plate, 6 ... Spacer, 7 ... Prechamber, 8 ... Spacer, 9 ... Filter element, 10 ... Perforated plate, 11 ... Part, 12,1
3...Return pipe.

Claims (1)

[Scope of utility model registration request] Perforated plates are provided on both sides of the filter element,
1. An oil separation device capable of separating oil by passing compressed air containing oil through it, characterized in that the porous plate is curved so as to present a convex surface relative to the flow of compressed air.