Oil-gas separator for helium compressor

Abstract

The utility model discloses an oil-gas separator for a helium compressor. The oil-gas separator comprises a barrel, a gas outlet pipe, a gas inlet pipe, an oil outlet pipe and a filter element, wherein the gas outlet pipe, the gas inlet pipe and the oil outlet pipe are vertically fixed at the top of the barrel; a gas-liquid separation assembly used for oil-gas separation is arranged below a pipe opening, located in the filter element, of the gas inlet pipe; the gas-liquid separation assembly comprises a conical top used for gathering oil liquid, and a cylindrical drainage body used for accelerating flowing of the oil liquid gathered on the conical top is arranged below the gas-liquid separation assembly. The top end of the conical top is a curved surface, the gradient is 45-60 degrees, the conical top has lipophilicity, and the gathering amount of oil liquid at the conical top is increased; the outer surface of the cylindrical drainage body is axially provided with multiple groups of drainage grooves penetrating up and down, the R angle is 1-5, the drainage grooves have oleophobicity, the attachment area of a liquid film on the cylindrical surface is increased, the liquefaction effect of the gas-liquid separation component is improved, and then the oil-gas separation efficiency is improved. The design is compact in structure, simple to manufacture, convenient to operate, low in production cost and easy to popularize.

Description

Technical Field

[0001] The present invention relates to a helium compression and separation device, and particularly to an oil-gas separator for a helium compressor. Background Art

[0002] The helium compressor compresses helium into a high-pressure state through mechanical compression to provide gas supply to meet the needs of superconducting refrigeration, gas analysis, etc. During the compression process, lubricating oil is mixed. The oil-gas separator is used to separate helium and lubricating oil in the compressor. After separation, the helium enters the adsorber through the outlet pipe at the top for further filtration, while the lubricating oil at the bottom of the separator returns to the pressure pack through the oil outlet pipe. However, due to the compact internal structure of the compressor, the traditional oil-gas separator for helium compressors has a small barrel diameter, and the length of the path that helium flows through the filter element is limited. When the oil mist concentration is too high and the oil droplet particle size is small, the oil mist flowing through the limited filter element path cannot effectively separate oil and gas, resulting in a considerable part of the oil mist being discharged from the outlet pipe with helium and entering the adsorber for further filtration. The filtration effect is poor, the quality of the output helium is low, and at the same time, the oil mist entering the adsorber will shorten the service life of the adsorber and cause waste of lubricating oil. Content of the Utility Model

[0003] Purpose of the Utility Model: The purpose of the present utility model is to improve the efficiency of oil-gas separation and provide an oil-gas separator for a helium compressor.

[0004] Technical Solution: The oil-gas separator for a helium compressor described in the present utility model includes a cylinder body, an outlet pipe, an inlet pipe, and an oil outlet pipe vertically fixed at the top of the cylinder body, and a filter element placed inside the cylinder body; a gas-liquid separation component for oil-gas separation is provided below the pipe orifice of the inlet pipe located inside the filter element; the gas-liquid separation component includes a conical top for aggregating oil liquid, and a cylindrical fluid guide body for accelerating the flow of the oil liquid aggregated at the conical top is arranged below it.

[0005] Furthermore, the material of the gas-liquid separation component is plastic or alloy. The top of the conical top is a curved surface, and the inclination of the conical top is 45°-60°, and it is subjected to lipophilic modification to increase the accumulation amount of oil on the conical top. Multiple arc-shaped drainage grooves are axially penetrated through the outer surface of the cylindrical drainage body, and its R angle is 1-5, preferably 2, to increase the attachment area of the liquid film on the cylindrical surface and improve the liquefaction effect of the gas-liquid separation component. The filter element 3 is stacked and wound by glass felt and non-woven fabric, fixed and pressed with a metal wire mesh, and then metal perforated plates are installed inside and outside the filter element, and stainless steel plates are welded up and down to complete the combined assembly. The bottom end of the gas-liquid separation component is welded to the bottom plate of the filter element. When the high-pressure helium gas containing lubricating oil enters the gas-liquid separation component from the inlet pipe, part of the oil adheres to the lipophilic conical curved surface in the form of an oil film. Under the dragging force of the flowing helium gas and its own gravity, it converges to the bottom of the cylinder along the drainage grooves of the cylindrical drainage body and is transported back to the compression package through the outlet pipe for recycling under the action of the pressure difference.

[0006] Furthermore, the pipe orifice of the inlet pipe located inside the filter element is a flared opening, which increases the area where the liquid film adheres to the gas-liquid separation component and increases the separation amount of the oil.

[0007] Furthermore, the gas-liquid separation component extends upward into the interior of the inlet pipe, and the guiding speed of the gas-liquid separation component is further increased by the dragging force of the high-speed helium gas, promoting the rapid aggregation of the oil to the bottom of the cylinder.

[0008] Beneficial effects: Compared with the prior art, the present utility model has the following advantages: 1. A gas-liquid separation component is added before the filter element of the helium gas to aggregate, drain and discharge the oil mist in the helium gas on the surface of the separator, reduce the concentration of oil particles entering the filter element, and improve the efficiency of oil-gas separation; 2. The conical surface and the cylindrical side surface are respectively subjected to lipophilic and oleophobic modification by a modifier. The lipophilic modification promotes the formation of an oil film by the oil in the high-pressure helium gas adhering to the conical surface, and the oleophobic modification and the drainage groove promote the rapid drainage of the oil on the cylindrical side surface, further improving the efficiency of oil-gas separation; 3. The design has a compact structure, is simple to manufacture, convenient to operate, and has a low production cost and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic structural diagram of the present utility model;

[0010] Figure 2 is a schematic structural diagram of the gas-liquid separation component of the present utility model;

[0011] Figure 3 is a schematic structural diagram of the second embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0013] Example 1

[0014] As Figure 1 shown, an oil-gas separator for a helium compressor includes a cylinder body 1, an air outlet pipe 2, an air inlet pipe 5, an oil outlet pipe 6 vertically fixed at the top of the cylinder body 1, and a filter element 3 placed inside the cylinder body 1. A gas-liquid separation component 4 for oil-gas separation is provided below the pipe orifice of the air inlet pipe 5 inside the filter element 3; the filter element 3 is stacked and wound by glass wool felt and non-woven fabric, fixed and pressed with a metal wire mesh, and metal perforated plates are installed inside and outside the filter element, and stainless steel plates are welded up and down to complete the combined assembly; the bottom end of the gas-liquid separation component 4 is welded to the bottom plate of the filter element 3.

[0015] As Figure 2 shown, the gas-liquid separation component 4 includes a conical top 7 for aggregating oil, and a cylindrical fluid guide 8 for accelerating the flow of the oil aggregated at the conical top is arranged below it; the material of the gas-liquid separation component 4 is 304 stainless steel, the top end of the conical top 7 is a curved surface with an inclination of 60°, and the curved surface of the conical top 7 is subjected to lipophilic modification; six groups of arc-shaped drainage grooves 9 are axially penetrated through the outer surface of the cylindrical fluid guide 8, and its R angle is 2 (which can also be set to 1-5 according to the requirements of the drainage effect), and the outer surface of the cylindrical fluid guide 8 is subjected to oleophobic modification.

[0016] When the high-pressure helium gas containing lubricating oil enters the gas-liquid separation component 4 from the air inlet pipe 5, part of the oil adheres to the lipophilic conical curved surface in the form of an oil film, and under the action of the drag force of the flowing helium gas and its own gravity, it converges to the bottom of the cylinder body 1 along the drainage grooves 9 of the cylindrical fluid guide 8, and is transported back to the compression pack through the oil outlet pipe 6 under the action of the pressure difference for recycling.

[0017] Example 2

[0018] As Figure 3 shown, an oil-gas separator for a helium compressor, which is different from Example 1: the material of the gas-liquid separation component 4 is a plastic material, the inclination of the conical top 7 is 45°, the R angle of the cylindrical fluid guide 8 is 5, the pipe orifice of the air inlet pipe 5 inside the filter element 3 is a flared opening, and the gas-liquid separation component 4 extends upward into the air inlet pipe 5. The flared opening of the air inlet pipe 5 increases the area where the liquid film adheres to the gas-liquid separation component 4 and improves the separation amount of the oil; the gas-liquid separation component 4 extends upward into the air inlet pipe 5, and the guiding speed of the gas-liquid separation component is further improved by the drag force of the high-speed helium gas, comprehensively improving the gas-liquid preliminary separation effect of the gas-liquid separation component.

Claims

1. An oil-gas separator for a helium compressor, comprising a cylinder body (1), an air outlet pipe (2), an air inlet pipe (5) and an oil outlet pipe (6) vertically fixed at the top of the cylinder body (1), and a filter element (3) placed inside the cylinder body; characterized in that, A gas-liquid separation component (4) for oil-gas separation is provided below the pipe orifice of the intake pipe (5) located inside the filter element (3); the gas-liquid separation component (4) includes a conical top (7) for aggregating oil, and a cylindrical fluid guide (8) for accelerating the flow of the oil aggregated at the conical top is arranged below it.

2. The oil-gas separator for a helium compressor according to claim 1, characterized in that, The material of the gas-liquid separation component (4) is plastic or alloy.

3. The oil-gas separator for a helium compressor according to claim 1, wherein The conical top (7) has oleophilicity.

4. The oil-gas separator for a helium compressor according to claim 3, characterized in that, The top end of the conical top (7) is a curved surface, and the inclination of the conical top (7) is 45° to 60°.

5. The oil-gas separator for a helium compressor according to claim 2, characterized in that, Axially arranged drainage grooves (9) penetrating up and down are provided on the outer surface of the cylindrical fluid guide (8).

6. The oil-gas separator for a helium compressor according to claim 5, wherein, Multiple groups of the drainage grooves (9) are provided.

7. The oil-gas separator for a helium compressor according to claim 5, characterized in that, The drainage grooves (9) are arc-shaped, and their R angle is 1-5.

8. The oil-gas separator for a helium compressor according to claim 5, characterized in that, The cylindrical fluid guide (8) has oleophobicity.

9. The oil-gas separator for a helium compressor according to claim 1, wherein The pipe orifice of the intake pipe (5) located inside the filter element (3) is a flared opening.

10. The oil-gas separator for a helium compressor according to claim 1, characterized in that, The gas-liquid separation component (4) extends upward into the interior of the intake pipe (5).

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