Oil-gas separator

Abstract

The oil-gas separator comprises a shell and a base, the base is installed on the lower portion of the shell, a separation assembly and a rotating shaft connected with the separation assembly are installed in the shell, and part of the rotating shaft extends into the base; a mounting part is arranged on the shell, a first bearing for inserting the rotating shaft is mounted in the mounting part, a through hole is formed in the rotating shaft, the aperture of the through hole is fixed, and a reducing assembly for changing the aperture of the through hole is mounted in the through hole. The bearing lubricating device has the beneficial effects that when a machine runs, oil mist in the base can enter the through hole, one part of the oil mist in the through hole penetrates through the penetrating hole to lubricate the second bearing, the other part of the oil mist in the through hole is discharged out of the through hole to lubricate the first bearing, the bearing lubricating convenience is improved, the diameter of the through hole can be changed through the variable-diameter hole plug, and the manufacturing difficulty of the rotating shaft is reduced.

Description

Technical Field

[0001] This application relates to the field of oil and gas separation technology, and in particular to an oil and gas separator. Background Technology

[0002] Currently, oil-gas separators are mainly used in the engine field. An oil-gas separator typically contains a separation component and a rotating shaft. The shaft drives the separation component to rotate, separating oil and gas through centrifugal force. Because the separation component is relatively heavy, bearings are usually used to fix the shaft in place to prevent it from shifting during high-speed rotation. However, bearings require frequent lubrication to ensure smooth operation. This means that traditional oil-gas separators require periodic application of lubricating oil to the bearings to maintain their smoothness, which undoubtedly increases the maintenance cost of the oil-gas separator.

[0003] To reduce the frequency of bearing lubrication, some researchers have designed the shaft as a hollow structure, allowing oil mist generated within the drive chamber to pass through the shaft and lubricate the bearing. Furthermore, to prevent excessive oil mist from affecting the separator's efficiency, the shaft bore is typically designed as a series of stepped holes with decreasing diameters. While this design reduces the amount of oil mist passing through, it also makes the shaft structure more complex, undoubtedly increasing the difficulty and cost of manufacturing. In addition, because the fixed bore diameter cannot be changed, its adaptability to different environments in practical applications is relatively poor. Utility Model Content

[0004] One of the objectives of this application is to provide an oil-gas separator that can solve at least one of the defects in the aforementioned background technology.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: an oil-gas separator, comprising a housing and a base; the base is installed at the lower part of the housing, and a separation component and a rotating shaft connected to the separation component are installed inside the housing, with a portion of the rotating shaft extending into the base; a mounting part is provided on the housing, and a first bearing for mounting the rotating shaft is installed in the mounting part; the rotating shaft is provided with a through hole, the diameter of which is fixed, and a variable diameter component for changing the diameter of the through hole is installed inside the through hole. The rotating shaft in this application can drive the separation component to rotate synchronously, and, based on the mass difference between oil and gas, uses centrifugal force to separate the oil and gas. The variable diameter component reduces the machining difficulty of the rotating shaft, and the diameter of the rotating shaft can be quickly changed using the variable diameter component, preventing a large amount of oil mist from entering the separation component and affecting the separation efficiency; additionally, different variable diameter plugs can be replaced according to actual needs to control the amount of oil mist discharged.

[0006] Preferably, the variable diameter component is a variable diameter plug, which is located close to the first bearing. This arrangement reduces the time required for oil mist to reach the first bearing and prevents oil mist passing through the variable diameter plug from failing to reach the first bearing due to excessive distance.

[0007] Preferably, a partition plate is installed between the housing and the base, and a second bearing is mounted on the partition plate, the second bearing being inserted into the rotating shaft. This arrangement, through the limiting cooperation of the first and second bearings, prevents the rotating shaft from shifting during rotation.

[0008] Preferably, the side wall of the rotating shaft is provided with a through hole that communicates with the through hole, and the through hole is close to the second bearing. With this arrangement, the oil mist in the through hole can pass through the through hole and enter the second bearing. As long as the oil-gas separator is in working condition, it can continuously lubricate the second bearing, reducing the difficulty of bearing lubrication.

[0009] Preferably, a first elastic element is installed between the first bearing and the separation assembly, and a second elastic element is installed between the second bearing and the separation assembly. This arrangement allows the elastic elements to absorb the vibration and impact forces generated by the separation assembly during high-speed rotation, thus protecting the components within the oil-gas separator.

[0010] Preferably, an air intake pipe is installed on the upper part of the housing, and a cover plate is installed on the mounting part. Multiple vent holes are provided on the periphery of the cover plate, and the air intake pipe communicates with the separation assembly through these vent holes. This arrangement not only prevents the oil mist in the vent holes from directly accumulating with the oil-gas mixture in the air intake pipe, but also blocks the oil mist discharged from the vent holes, allowing it to fall onto the first bearing for lubrication.

[0011] Preferably, an exhaust pipe is installed inside the housing, and a baffle is installed below the exhaust pipe. This arrangement prevents oil on the partition from splashing into the exhaust pipe and causing contamination.

[0012] Preferably, the mounting portion is provided with an annular baffle, and the separation assembly is provided with an annular sealing groove for cooperating with the annular baffle. This arrangement allows a labyrinth seal with a certain gap to be formed by the annular baffle and the annular sealing groove, enabling the oil-gas mixture passing through the intake pipe to smoothly enter the interior of the separation assembly without diffusing outwards.

[0013] Preferably, a drive impeller is mounted on the lower part of the rotating shaft, and an oil injection assembly is mounted on the side of the base, with the oil injection nozzle of the oil injection assembly aligned with the drive impeller. This configuration allows the oil injection assembly to spray high-pressure oil onto the drive impeller, thereby driving the drive impeller to rotate the rotating shaft and achieve separation of the oil-gas mixture; the oil mist generated by the impact can then enter the through-hole to lubricate the bearings.

[0014] Preferably, the partition plate is provided with a stepped groove, and the drive impeller is provided with a stepped block for cooperating with the stepped groove, with a gap between the stepped groove and the stepped block. This arrangement forms a curved seal between the stepped groove and the stepped block. When oil flows within the gap of the curved seal, it will reverse the flow of oil in the base, preventing oil in the base from entering the housing due to pressure difference and causing a decrease in separation efficiency.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] Oil mist within the base can enter the rotating shaft through the through-hole. Part of the oil mist passes through the perforation into the second bearing, while the rest diffuses upwards and exits the through-hole into the first bearing. Simply running the machine provides continuous lubrication to the bearings, improving the convenience of lubrication. The variable-diameter plug controls the amount of oil mist discharged, preventing excessive oil mist from entering the separation assembly and affecting separation efficiency. Furthermore, the variable-diameter plug is relatively simple to manufacture, avoiding the need for stepped holes in the rotating shaft, and allowing for the replacement of different sizes of variable-diameter plugs to control the amount of oil mist discharged, depending on actual needs.

[0017] A curved seal can be formed between the drive impeller and the partition plate, which can reverse the flow of oil in the base when oil flows in the gap between the partition plate and the drive impeller. The baffle can also block splashed oil in the housing, preventing oil from entering the outlet pipe and causing contamination. In addition, the labyrinth seal formed by the annular baffle and the annular sealing groove allows the oil-gas mixture in the inlet pipe to smoothly enter the separation assembly without diffusing outward. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this application.

[0019] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle.

[0020] Figure 3 for Figure 1 A magnified schematic diagram of part B in the middle.

[0021] Figure 4 This is a schematic diagram of the internal installation of the oil-gas separator in this application.

[0022] Figure 5 This is a schematic diagram of the cover plate in this application.

[0023] In the diagram: 1. Shell; 11. Divider plate; 12. Mounting part; 13. Inlet pipe; 14. Outlet pipe; 100. First bearing; 101. First elastic element; 110. Stepped groove; 120. Annular baffle; 2. Base; 21. Oil injection assembly; 200. Second bearing; 201. Second elastic element; 3. Separation assembly; 31. Annular sealing groove; 300. Cover plate; 301. Vent hole; 4. Rotating shaft; 41. Through hole; 42. Perforation; 43. Variable diameter plug; 44. Drive impeller; 400. Baffle; 440. Stepped block. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] One aspect of this application provides an oil-gas separator, such as... Figure 1 and Figure 2As shown, one preferred embodiment includes a housing 1 and a base 2. The base 2 is installed at the lower part of the housing 1. A separation component 3 and a rotating shaft 4 are installed inside the housing 1. The separation component 3 is connected to the rotating shaft 4 so that the rotating shaft 4 can drive the separation component 3 to rotate synchronously, thereby achieving the purpose of oil-gas separation. A mounting part 12 is provided at the upper part of the housing 1, and a first bearing 100 for inserting the rotating shaft 4 is installed in the mounting part 12. The rotating shaft 4 is provided with a through hole 41 for transmitting oil mist. The diameter of the through hole 41 is fixed, and a diameter-changing component is installed in the through hole 41 to change the diameter of the through hole 41.

[0029] It should be noted that the oil-gas separator in this application uses a rotating shaft 4 to drive the separation component 3 to rotate at high speed, and uses centrifugal force to separate the oil and gas based on their mass difference. The variable diameter component can reduce the throughput of oil mist in the through hole 41, preventing a large amount of oil mist from passing through the through hole 41 and entering the separation component 3, thus affecting the efficiency of oil-gas separation. In addition, oil mist that cannot pass through the variable diameter component accumulates on the inner wall of the through hole 41 to form oil droplets, which then slide down into the base 2 under gravity.

[0030] Specifically, such as Figure 2 As shown, the reducing component is a reducing orifice plug 43. Inserting the reducing orifice plug 43 into the through hole 41 changes the orifice diameter of the through hole 41. When the oil mist in the through hole 41 diffuses upward, the reducing orifice plug 43 can act as a blockage, preventing some of the oil mist from passing through the pores of the reducing orifice plug 43.

[0031] It is understandable that the amount of oil mist discharged from the through hole 41 is relatively small due to the obstruction of the reducing hole plug; in order to prevent the oil mist from failing to reach the first bearing 100, the installation point of the reducing hole plug 43 can be close to the first bearing 100.

[0032] It should be noted that the setting of the variable diameter plug 43 frees us from the constraint of setting a stepped hole in the through hole 41 to reduce the amount of oil mist discharge; it not only reduces the machining difficulty of the rotating shaft 4, but also allows for the replacement of different specifications of variable diameter plug 43 to control the amount of oil mist discharge according to actual needs.

[0033] In this embodiment, as Figure 1 and Figure 3 As shown, a partition plate 11 is installed between the housing 1 and the base 2. A second bearing 200 is installed on the partition plate 11. The end of the rotating shaft 4 away from the first bearing 100 is inserted into the second bearing 200. The limiting cooperation between the first bearing 100 and the second bearing 200 can prevent the rotating shaft 4 from shifting when rotating.

[0034] Furthermore, such as Figure 3As shown, a through hole 42 communicating with the through hole 41 is provided on the side wall of the rotating shaft 4, and the second bearing 200 is located below the through hole 42. When the machine is running, a large amount of oil mist is generated in the base 2, which causes the air pressure in the base 2 to increase rapidly. The oil mist is pushed into the through hole 41 by the air pressure. Some of the oil mist directly enters the second bearing 200 through the through hole 42, while the oil mist that cannot pass through the variable diameter plug 43 adheres to the inner wall of the through hole 41 and accumulates into oil droplets. When the oil droplets in the through hole 41 flow to the through hole 42, they can also pass through the through hole 42 and enter the second bearing 200 for lubrication.

[0035] It is understandable that the perforation 42 provided in this application can continuously lubricate the second bearing 200 when the oil-gas separator is in operation, which greatly reduces the lubrication difficulty of the second bearing 200 and also reduces the time cost for operators to lubricate the bearing.

[0036] In this embodiment, as Figure 2 and Figure 3 As shown, a first elastic element 101 is installed between the first bearing 100 and the separation assembly 3, and a second elastic element 201 is installed between the second bearing 200 and the separation assembly 3. The first elastic element 101 and the second elastic element 201 cooperate to provide elastic support for the separation assembly 3. During machine operation, the first elastic element 101 and the second elastic element 201 can absorb the vibration and impact force generated by the separation assembly 3 during high-speed rotation, thereby protecting the components of the oil-gas separator.

[0037] In this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, an air inlet pipe 13 is installed on the upper part of the housing 1, and a cover plate 300 is installed on the upper part of the mounting part 12. Multiple vent holes 301 are provided around the periphery of the cover plate 300. The air inlet pipe 13 communicates with the separation assembly 3 through the vent holes 301. Since the oil-gas mixture in the air inlet pipe 13 flows downwards, if the first bearing 100 is not blocked, impurities carried in the oil-gas mixture can easily enter the rotating parts of the first bearing 100, causing malfunctions. The cover plate 300 also serves to block oil mist. The oil mist discharged from the through hole 41 can be blocked between the cover plate 300 and the first bearing 100, and falls onto the first bearing 100 under gravity. Part of the oil on the first bearing 100 is used for lubrication, while the other part can enter the separation assembly and be discharged to the base 2 along with the oil in the oil-gas mixture.

[0038] Furthermore, such as Figure 3 and Figure 4As shown, an exhaust pipe 14 is installed inside the housing 1, through which the gas in the oil-gas mixture can be discharged. To prevent oil on the housing 1 from splashing into the air inlet of the exhaust pipe 14 under machine vibration and forming an oil-gas mixture again, in some embodiments of this application, a baffle 400 is installed below the exhaust pipe 14, and the baffle 400 is installed on the partition plate 11. When oil splashes on the partition plate 11, the baffle 400 can block the oil, preventing the separated oil from splashing directly into the exhaust pipe 14 and causing pollution.

[0039] Understandably, since the baffle 400 installed below the exhaust pipe 14 prevents the oil on the partition plate 11 from splashing into the exhaust pipe 14, the air inlet of the exhaust pipe 14 can be made larger to increase the gas discharge efficiency.

[0040] In this embodiment, as Figure 2 As shown, an annular baffle 120 is provided on the mounting part 12, and an annular sealing groove 31 is provided on the separation component 3. When the annular baffle 120 is inserted into the annular sealing groove 31, a labyrinth seal with a certain gap can be formed. The end face of the annular baffle 120 and the inner wall of the annular sealing groove 31 form a small intercepting gap, while the top of the annular baffle 120 and the bottom of the annular sealing groove 31 form a larger expansion cavity. According to the principles of fluid mechanics, when the oil-gas mixture enters the intercepting gap, the flow velocity of the mixed gas increases and flows towards the expansion cavity. Since the volume of the expansion cavity is larger than the intercepting gap, the mixed gas can form a vortex in the expansion cavity, making the flow velocity of the mixed gas close to zero, thereby allowing the oil-gas mixture passing through the intake pipe 13 to smoothly enter the interior of the separation component 3 without diffusing outward.

[0041] In this embodiment, as Figure 1 and Figure 3 As shown, a drive impeller 44 is fixedly installed at the lower part of the rotating shaft 4, and the drive impeller 44 is located inside the base 2; an oil spray assembly 21 is installed on the side of the base 2, and the oil spray nozzle of the oil spray assembly 21 faces the drive impeller 44. High-pressure oil is sprayed onto the drive impeller 44 through the oil spray nozzle, which causes the drive impeller 44 to rotate, thereby causing the drive impeller 44 to drive the rotating shaft 4 to rotate synchronously; the oil mist generated when the high-pressure oil hits the drive impeller 44 can enter the through hole 41 to lubricate the first bearing 100 and the second bearing 200.

[0042] Furthermore, such as Figure 2As shown, the separator plate 11 is provided with a stepped groove 110, and the drive impeller 44 is provided with a stepped block 440 for engaging with the stepped groove 110. The stepped block 440 is embedded in the stepped groove 110 with a gap between them. The stepped block 440 and the stepped groove 110 can cooperate to form a curved seal. When oil flows in the gap of the curved seal, it will reverse the flow of oil in the base 2, preventing the oil in the base 2 from entering the housing 1 due to pressure difference, thus avoiding a decrease in separation efficiency.

[0043] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An oil-gas separator, comprising a housing (1) and a base (2), characterized in that, The base (2) is installed on the lower part of the housing (1). The housing (1) is equipped with a separation component (3) and a rotating shaft (4) connected to the separation component (3). Part of the rotating shaft (4) extends into the base (2). The housing (1) is provided with a mounting part (12). The mounting part (12) is equipped with a first bearing (100) for inserting the rotating shaft (4). The rotating shaft (4) is provided with a through hole (41). The diameter of the through hole (41) is fixed. The through hole (41) is equipped with a diameter-changing component for changing the diameter of the through hole (41).

2. The oil-gas separator as described in claim 1, characterized in that, The variable diameter assembly is a variable diameter plug (43), which is located near the first bearing (100).

3. The oil-gas separator as described in claim 1, characterized in that, A partition plate (11) is installed between the housing (1) and the base (2), and a second bearing (200) is installed on the partition plate (11). The second bearing (200) is inserted into the rotating shaft (4).

4. The oil-gas separator as described in claim 3, characterized in that, The side wall of the rotating shaft (4) is provided with a through hole (42) that communicates with the through hole (41), and the through hole (42) is close to the second bearing (200).

5. The oil-gas separator as described in claim 3, characterized in that, A first elastic element (101) is installed between the first bearing (100) and the separation assembly (3), and a second elastic element (201) is installed between the second bearing (200) and the separation assembly (3).

6. The oil-gas separator as described in claim 1, characterized in that, An air inlet pipe (13) is installed on the upper part of the housing (1), and a cover plate (300) is installed on the mounting part (12). A plurality of vent holes (301) are provided on the periphery of the cover plate (300); the air inlet pipe (13) is connected to the separation component (3) through the vent holes (301).

7. The oil-gas separator as described in claim 1, characterized in that, An air outlet pipe (14) is installed on the housing (1), and a baffle (400) is installed below the air outlet pipe (14).

8. The oil-gas separator as described in claim 1, characterized in that, The mounting part (12) is provided with an annular baffle (120), and the separation assembly (3) is provided with an annular sealing groove (31) for cooperating with the annular baffle (120).

9. The oil-gas separator as described in claim 3, characterized in that, A drive impeller (44) is installed on the lower part of the rotating shaft (4), and an oil injection assembly (21) is installed on the side of the base (2). The oil injection nozzle of the oil injection assembly (21) is aligned with the drive impeller (44).

10. The oil-gas separator as described in claim 9, characterized in that, The partition plate (11) is provided with a stepped groove (110), and the drive impeller (44) is provided with a stepped block (440) for cooperating with the stepped groove (110). A gap is left between the stepped groove (110) and the stepped block (440).

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