KR102510419B1 - Mult cyclone oil separator device for air compressor - Google Patents

Abstract

The multi-cyclone gas-liquid separation device for an air compressor of the present invention includes an inlet 118 into which compressed air flows, an oil return pipe 95 into which separated oil is recovered, and an oil tank 102 in which a flange portion with an open middle is formed, In an air compressor equipped with an oil separator filter (99) for filtering compressed air containing oil, and an air outlet (162) for discharging air filtered through the oil separator filter,
In order to improve the inconvenience of having to replace the separator filter 99 in the form of a kind of fiber, which deteriorates the performance of the compressor due to the generation of differential pressure after a certain period of time,
It is an object of the present invention to provide a cyclone-type oil separator that can be used for a long time without deteriorating the performance of an air compressor because there is relatively no differential pressure.

Description

Multi-cyclone gas-liquid separator for air compressor {MULT CYCLONE OIL SEPARATOR DEVICE FOR AIR COMPRESSOR}

The present invention relates to an oil separation filter for an air compressor, and more particularly, to an oil separation device for an air compressor provided at a rear end of a compressor of an oil-lubricated air compressor to separate compressed air mixed with oil into air and oil.

An air compressor is an air production machine that compresses air to the required pressure using a piston, impeller, screw, etc. for the use of compressed air and stores it in a tank. is basically the same, but a compressor is distinguished from a pump in that it pressurizes gas to convert pressure and velocity.

Air compressors can be divided into several types according to the classification method, but they are largely divided into centrifugal and volumetric types according to the compression method.

The centrifugal type is further divided into an axial flow type and a mixed flow type, and the volumetric type is divided into a reciprocating type and a rotary type.

The structure of the positive displacement air compressor varies depending on whether it is a reciprocating type or a rotary type, and even if it is the same type, it varies according to a multi-stage compressor using an intermediate cooling method or a single-stage compressor without an intermediate cooler. In addition, the structure varies greatly depending on whether the cooling method is air-cooled or water-cooled using a cooling water line.

Compressors installed and used in most industrial sites are displacement type.

That is, the mobile small air compressor is a reciprocating air compressor, and a screw air compressor compactly built into a package is a rotary air compressor.

Among them, screw air compressors are commonly used in most workplaces. The air and oil flow chart of the screw air compressor is as follows.

As shown in FIG. 1, air in the atmosphere is sucked in through the intake filter 20, the screw compressor 30 driven by an electric motor rotates, and oil is used as a lubricant for smooth driving, sealing, and cooling of the internal screw. It is compressed to the required pressure and introduced into the pressure tank 102 through the pipe (118).

The compressed air containing oil is primarily separated in the pressure tank 102, and the compressed air and oil are separated again by the oil separator filter 99. The separated compressed air is supplied to the required line or receiver tank through the discharge port 162,

The oil separated from the compressed air is cooled by the heat exchanger and supplied to the compressor 30 again through the oil filter 40.

Here, in the structure of the conventional oil separation device

Compressed air containing oil introduced into the tank (118) is mostly composed of a primary oil separator (120) through a structure that rotates along the outer wall of the pressure tank (102).

Then, while passing through the separator filter 99 secondarily, the oil is filtered to separate air and oil.

Here, the secondarily separated oil is collected at the lower end 97 of the separator filter 99, and the oil is sent back to the compressor 30 through the return pipe 95.

Here, the separator filter 99 is composed of a kind of fiber, and when air containing oil passes through, the oil is formed on the surface of the filter and is gathered to the lower part 97. As the is clogged with impurities, the separation performance deteriorates and a differential pressure is generated between the inside of the tank 114 and the inside 98 of the separator filter 99, resulting in a decrease in efficiency of the entire air compressor.

Therefore, there is an inconvenience that needs to be replaced after a certain period of time.

In addition, the oil formed on the surface of the separator filter and collected at the lower end 97 is continuously sent to the compressor 30 through the return pipe 95 composed of a small hose using the pressure inside the tank.

An object of the present invention is to provide a separator filter that can be used semi-permanently once installed in order to improve the cost and inconvenience of replacing the separator filter when the lifespan of the separator filter composed of fibers is exhausted due to impurities after a certain period of time. As the usage time increases, it is possible to prevent the efficiency of the compressor from decreasing due to the differential pressure between the inside and outside of the filter due to clogging of the filter.

The present invention uses a plurality of cyclones to separate oil and gas while passing through a fibrous separator filter in the conventional oil-containing compressed air, so that the oil-containing compressed air rotates inside the cylindrical surface, so that the air is released by centrifugal force. Oil that is relatively heavier is adhered to the outer wall and flows downward by gravity, and the relatively clean air from which the oil is removed by the upward flow is discharged to the center, and each has one or more inlets and one outlet. A plurality of cyclones are provided, and the at least one inlet provided in each of the plurality of cyclones protrudes outward from a body of each of the cyclones and may be formed in a tangential direction with respect to an outer circumferential surface of each of the plurality of cyclones.

In addition, each of the plurality of cyclones may include a hollow cylindrical portion provided with the at least one inlet; a hollow truncated cone portion provided at a lower end of the hollow cylindrical portion; and a top plate installed at an upper end of the cylindrical portion and provided with the outlet.

Also, each of the plurality of inlets may have a cross-sectional area equal to or less than the cross-sectional area of the outlet.

In addition, the multi-cyclone separation device according to an embodiment of the present invention includes a housing forming the plurality of cyclones; a collecting chamber installed inside the housing, provided below the plurality of cyclones, and collecting oil separated from the plurality of cyclones; A lower plate installed to configure the collection chamber; A storage unit provided above the plurality of cyclones and having a concave shape to store oil in an extended structure of the housing: installed through the storage unit and connected to the collection room and the storage unit to move the collected oil to the storage unit A connector; may be included.

In addition, an inlet passage leading to the plurality of cyclones may be formed on an outer wall of the housing forming the plurality of cyclones, and a porous member may be installed along the entire circumference. In addition, a lower portion of the housing forming the plurality of cyclones may be formed with a porous member. can be installed

The separation device of the present invention is installed inside the air tank of an air compressor used throughout the industry, and is formed to separate fine oil from partially clean air from which oil is primarily separated in the tank, each with one or more inlets and one A cyclone having two outlets, and a recovery line connecting the collection chamber and the housing to discharge the recovered oil to the outside of the tank, wherein the at least one inlet provided in each of the plurality of cyclones is provided for each of the plurality of cyclones. It protrudes outward from the body and may be formed in a tangential direction with respect to the outer circumferential surface of the body.

According to the gas-liquid separator using a multi-cyclone according to the present invention, the lifetime has the advantage of being able to be used semi-permanently compared to the conventional fibrous separator having to be replaced at regular intervals, and the differential pressure caused by impurities is reduced by using for a certain period of time. There is an advantage in that the performance of the compressor does not decrease because it does not occur, and the cost and environmental pollution caused by discarding the fibrous separator filter whose life is over is improved.

Figure 1: It is a view showing the overall configuration of the air compressor of the prior art
Figure 2: It is a view showing the coupling structure of the prior art gas-liquid separator
Figure 3: It is a view showing the cross-sectional structure of a prior art gas-liquid separator
Figure 4: It is a view showing the coupling structure of the gas-liquid separator according to an embodiment of the present invention
5: is a view showing the cross-sectional structure of a gas-liquid separator according to an embodiment of the present invention
6: is a view showing the cross-sectional structure of a gas-liquid separator according to an embodiment of the present invention
7: It is a view showing the internal structure of the cyclone of the gas-liquid separator according to an embodiment of the present invention
8: is a view showing an external perspective view and an exploded perspective view of a gas-liquid separation device according to an embodiment of the present invention

The present invention,

The details of the characteristics of each part 20, 30, 40 of the air compressor are not so important, as discussed below, only with respect to the cyclone separation device.

The cyclone separator 130 of the present invention is shown in FIGS. 4, 5 and 6.

The specific overall shape of the cyclone separator 130 may be changed according to the type of air compressor in which the cyclone separator 130 is to be used. For example, the overall length of the cyclone separator 130 may be increased or decreased relative to the diameter of the pressure tank 102.

In the coupling structure of the conventional oil separation device shown in FIG.

Compressed air containing oil introduced into the tank (118) is mostly composed of a primary oil separator (120) through a structure that rotates along the inner wall of the oil tank (102).

In addition, there is a circular wall 122 therebetween, which serves to prevent oil scattered during turning from passing directly toward the separator filter 99 or the discharge port 162.

The multi-cyclone separation device 130 according to an embodiment of the present invention shown in FIGS. 4 and 5 includes a cylindrical porous member 126 and a plurality of cyclones 131 having independent spaces inside the cylindrical outer wall 125. ) with a separation device,

The multi-cyclone separation device 130 is composed of a plurality of cyclones 131 connected in parallel, and serves to separate oil and air by passing compressed air through the plurality of cyclones 131 at the same time.

The clean air separated from the multi-cyclone separator 130 undergoes a cooling process through the discharge port 162, and then is supplied to the required line or receiver tank through the main pipe 262, and is separated in the multi-cyclone separator 130. The oil is continuously sent to the compressor 30 through the return pipe 95 composed of a small hose.

6 In the structure of the gas-liquid separation device according to an embodiment of the present invention, the multi-cyclone separation device 130 has a substantially cylindrical housing 125 and a concave upper boundary 146, and has one air outlet. 144 and a plurality of cyclones 131 including a hollow cylindrical portion 135 provided with one or more air inlets 134 and an inclined hollow truncated cone portion 136 provided at the lower end of the cylindrical portion, The plurality of cyclones 131 are again surrounded by a cylindrical outer wall 140, which forms a lower area of the cyclone and is bounded by the lower cover 145, and forms a lower space collection chamber 142 in which separated oil is collected.

While the air containing oil is introduced through the tank inlet 118 and moves downward along the inner space 120 while turning along the inner wall of the pressure tank 102, the primarily separated oil falls downward and is separated. The air passes through the lower cover 106 having a plurality of fine holes and the cylindrical pre-filter 126 having a plurality of fine holes, and then passing through one or more air inlets 134 installed below the upper boundary 146. One or more air inlets 134 protrude outward from a plurality of cyclone bodies including a cylindrical shape 135 and an inclined hollow truncated cone 136, and are disposed in a tangential direction in the plurality of cyclone bodies to contain oil. ensure that the compressed air follows a spiral path around the cylindrical cyclone 135 and the inclined cyclone 136.

7 In the cyclone structure according to an embodiment of the present invention, the plurality of cyclones 131 are generally cylindrical in shape and have one or more air inlets 134, and the one or more air inlets 134 have a slot shape.

7-a, 7-b and 7-c show one or more air inlets 134 according to an embodiment of the present invention.

The cyclone 131 has a hollow cylindrical portion 134 adjacent to the upper boundary 146 and an inclined hollow truncated cone portion 136 . The hollow truncated cone 136 is conical and has a conical opening 138 at its lower end.

An outer wall 140 in the shape of a cylinder extends between a portion of the outer wall of the inclined frustum 136 of the cyclone 130 over the conical opening 138 . When the lower cover 145 is coupled, the cylindrical outer wall 140 is sealed due to the lower cover 145 and forms a collection chamber 142 .

The conical opening 138 leads to the collection chamber 142, which is a closed space.

Air outlets 144 are installed at upper ends of the plurality of cyclones 131 to allow partially clean air separated from oil to exit the cyclones 131 .

In addition, the oil separated from the plurality of cyclones 131 flows down the wall of the hollow truncated cone 136 and is collected in the collecting chamber 142, which is a lower space, through the conical opening 138.

The lower cover 145 is coupled to the cylindrical outer wall 140 to form the collection chamber 142, and when the separated oil flows down the wall of the hollow truncated cone 136 and flows down through the conical opening 138, it is in one place. It has an inclined shape so that it can gather, and it is a structure where oil gathers at the lowest position.

The collection chamber 142, which is the lower space of the plurality of cyclones 131, and the upper space 152 of the plurality of cyclones 131 are bounded by a boundary wall 146 having a concave shape 149, and are lower than the outlet 144. Located in, the lower collection chamber 142 maintains a relatively higher pressure than the upper storage unit 152.

Differential pressure is generated according to pipe loss generated while passing through the cyclone inlet 134 and the air outlet 144.

Here, when the lower collection chamber 142 of the plurality of cyclones 131 and the upper storage part 152 of the plurality of cyclones 131 are connected with a connection pipe 147, the oil collected in the lower collection chamber 142 of the plurality of cyclones 131 The silver is moved to the concave storage part 152 provided in the boundary wall 146 due to the internal pressure differential.

The oil collected in the storage unit 152 is continuously sent to the compressor 30 through the return pipe 95 in the same manner as in the conventional method.

From the foregoing description, it can be seen that the pressure tank 102 of the air compressor is composed of two different cyclone separation stages including the cyclone separation device 120, which is a primary oil separation structure, and the multi-cyclone separation device 130 of the present invention. Able to know.

The circular inner wall constituting the pressure tank 102 constitutes the primary cyclone separator 120 having a cylindrical structure. This primary cyclone separation device 120 is generally used in most conventional methods, and the relatively large diameter of the inner wall of the pressure tank 102 means that the centrifugal force of the oil is relatively small, so it is mainly oil that is formed significantly large or relatively fast. This means that the oil entering the tank at high velocity will be separated from the air stream. Most of the oil will separate inside the tank 114, including some fine oil.

The plurality of cyclones 131 constitute the multi-cyclone separator 130 of the present invention.

In this multi-cyclone separation device 130, the radius of each cyclone 131 is much smaller than the radius of the inner wall of the pressure tank 102, so that the centrifugal force applied to the oil contained in the gas stream is the primary cyclone separation device ( 120), i.e. the centrifugal force applied at the outer wall of the tank. Therefore, the efficiency of the multi-cyclone separator 130 of the present invention is higher than that of the first cyclone separator 120, and the multi-cyclone separator 130 has already been separated from the first cyclone separator 120. The performance of the multi-cyclone separation device 130 of the present invention is improved because it encounters an air stream containing oil particles of a smaller size range.

20: suction filter
30: compressor
95: recovery pipe
99: separator filter
102: pressure tank
106: lower cover
120: oil separator
125: housing
126: pre-filter
130: cyclone separation device
131: Cyclone
142: collection room
145: lower cover
146: boundary wall
147: connector
152: storage unit
162: discharge port

Claims (2)

In the multicyclone gas-liquid separation device for an air compressor,
a hollow cylindrical portion 135 provided with one or more inlets 134; A plurality of cyclones 131 comprising a hollow truncated cone portion 136 provided at the lower end of the hollow cylindrical portion;
a housing 125 forming the plurality of cyclones;
A lower cover 145 configured to include; a collecting chamber 142 installed inside the housing, provided below the plurality of cyclones, and collecting oil separated from the plurality of cyclones;
A storage portion 152 concavely formed to store oil in the central portion of the housing;
A connection pipe 147 installed through the storage unit and connecting the collection room and the storage unit to move the oil collected in the collection room to the storage unit;
It is characterized in that it is formed on the outside of the plurality of cyclones and includes a pre-filter 126 for filtering foreign substances in the inflowing air,
At least one inlet provided in each of the plurality of cyclones is formed outside the body of each of the plurality of cyclones and is formed in a tangential direction with respect to an outer circumferential surface of each of the plurality of cyclones,
As the compressed air containing oil rotates inside the cylindrical surface of each of the plurality of cyclones, oil relatively heavier than air due to centrifugal force adheres to the inner wall of the cylindrical surface and flows downward by gravity, and the oil flows downward in the center by an upward flow. Characterized in that the removed air is discharged upward,
The collecting chamber 142 is located lower than the outlet 144 of the cyclone 131, and the collecting chamber 142 is located lower than the storage unit 152 to maintain a relatively high pressure, so that the connection pipe 147 Air compression characterized in that the oil collected in the collection chamber 142 can be moved to the storage unit 152 due to the differential pressure therein, so that it can be continuously sent to the compressor 30 through the return pipe 95. Multicyclone gas-liquid separator for gas.

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