Centrifugal oil-gas separator

Abstract

The centrifugal oil-gas separator comprises a shell, a separation assembly and a rotating shaft connected with the separation assembly are installed in the shell, and the rotating shaft is used for driving the separation assembly to rotate synchronously; the rotating shaft is provided with through holes with the same hole diameter, variable-diameter hole plugs are installed in the through holes, and a first bearing is installed on the rotating shaft. A partition plate for supporting the rotating shaft is arranged below the shell, the partition plate is sunken inwards, and a sleeve is arranged at the lowest position of the partition plate; an oil outlet is formed in the connecting position of the sleeve and the partition plate, a protective cover used for preventing oil from splashing is installed on the sleeve, a check block is arranged on the protective cover, and the check block partially shields the oil outlet. A gap is reserved between the outer edge of the protective cover and the end face of the partition plate. The rotary shaft has the beneficial effects that the machining difficulty of the rotary shaft is effectively reduced through the variable-diameter hole plug, oil mist in the base can lubricate the bearing through the through hole, and convenience is provided for lubrication of the bearing; and the protective cover can prevent oil on the partition plate from splashing into the air outlet pipe to cause pollution.

Description

Technical Field

[0001] The present application relates to the technical field of oil-gas separation, and in particular to a centrifugal oil-gas separator. Background Art

[0002] Oil-gas separators are mainly used in the field of automobile engines. At present, most oil-gas separators are centrifugal oil-gas separators. The process principle is to output energy to the shaft to make the separation component on the shaft rotate at high speed. The separation component is provided with multiple separation blades. The mixed gas is affected by the centrifugal force in the separation blades to capture the oil particles and throw them out of the separation blades, thereby achieving the purpose of oil and gas separation. However, since the oil-gas separator will generate vibration and strong gas flow during operation, it is easy for the separated oil to enter the outlet pipe, causing pollution; in addition, part of the oil on the shell will also slide to the outer wall of the outlet pipe under the action of gravity, and flow to the air inlet of the outlet pipe under the vibration of the machine, affecting the efficiency of oil-gas separation.

[0003] Since the separation component will pull the shaft under the action of centrifugal force when rotating, bearings are generally inserted at both ends of the shaft to limit the shaft; and the bearings need to be lubricated regularly to ensure smoothness. Traditional oil-gas separators require the machine to be stopped or disassembled before the bearings can be lubricated, which undoubtedly increases the maintenance cost of the machine; therefore, it is necessary to improve the structure of the centrifugal oil-gas separator. Summary of the invention

[0004] One of the objects of the present application is to provide a centrifugal oil-gas separator that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a centrifugal oil-gas separator, comprising a shell, in which a separation component and a rotating shaft connected to the separation component are installed, and the rotating shaft is used to drive the separation component to rotate synchronously; a through hole with a uniform aperture is provided on the rotating shaft, a reducing hole plug is installed in the through hole, and a first bearing is installed on the rotating shaft; a partition plate for supporting the rotating shaft is provided under the shell, the partition plate is recessed inwardly, and a sleeve is provided at the lowest point of the partition plate; an oil outlet is provided at the connection between the sleeve and the partition plate, a protective cover for preventing oil splashing is installed on the sleeve, a block is provided on the protective cover, and the block partially blocks the oil outlet; a gap is left between the outer edge of the protective cover and the end face of the partition plate.

[0006] Through the above arrangement, the mixed gas first enters the separation component, and is separated into oil and gas under the high-speed rotation of the separation component; the oil is thrown to the inner wall of the shell, and slides down to the partition plate under the action of gravity, and then passes through the oil outlet under the guidance of the partition plate and gathers in the sleeve; the gas stays in the shell, and is discharged to the outside through the air outlet pipe under the push of air pressure; the protective cover and the block can prevent the oil in the partition plate and the sleeve from splashing into the air outlet pipe and causing pollution. The present application sets the rotating shaft to be hollow, and the oil mist under the rotating shaft can be transmitted to the first bearing through the through hole under the action of air pressure for lubrication, which greatly reduces the difficulty of lubricating the bearing; the variable diameter hole plug can change the aperture of the through hole to prevent a large amount of oil mist from entering the separation component and affecting the separation efficiency of the separation component.

[0007] Preferably, an air inlet pipe is installed on the shell, and the air inlet pipe is connected to the separation assembly; the separation assembly includes a frame and a separation disc, and the separation disc is provided with a separation hole for ventilation; there are multiple separation discs, and the multiple separation discs are stacked in sequence in the frame, and a gap is left between two adjacent separation discs. Through the above arrangement, the mixed gas can be directly transported to the separation assembly through the air inlet pipe, and the mixed gas can be evenly diffused to the gap between the separation discs, which can further improve the separation efficiency of the separation assembly.

[0008] Preferably, the housing is provided with a mounting portion, the first bearing is mounted on the mounting portion, the sleeve is provided with a second bearing, and the rotating shaft is sequentially plugged with the first bearing and the second bearing. Through the above arrangement, the first bearing and the second bearing can be used to limit the rotating shaft, so as to prevent the separation component from pulling the rotating shaft and causing deflection during the rotation process.

[0009] Preferably, the variable diameter hole plug is close to the first bearing, and a through hole is provided on the rotating shaft, and the through hole is close to the second bearing. Through the above arrangement, variable diameter hole plugs of different specifications can be replaced according to actual needs, avoiding the need to open a stepped hole on the rotating shaft to reduce the amount of oil mist passing through, reducing the processing cost of the rotating shaft, and allowing the oil mist passing through the variable diameter hole plug to quickly reach the first bearing; while the oil mist that does not pass through the variable diameter hole plug will gather on the inner wall of the through hole to form oil droplets, and then slide out of the through hole under the action of gravity, wherein the oil droplets in the same straight line as the through hole can enter the second bearing through the through hole for lubrication.

[0010] Preferably, an annular sealing groove is provided on the frame, an annular baffle is provided below the mounting portion, and the annular baffle extends into the annular sealing groove; a cover plate is installed on the mounting portion, and the cover plate is used to block the gas in the through hole, and a vent is provided on the peripheral side of the cover plate, and the separation component is connected to the intake pipe through the vent. Through the above arrangement, the annular baffle and the annular sealing groove can cooperate to form a labyrinth seal with a certain gap, so that the mixed gas in the intake pipe can smoothly enter the interior of the separation component without diffusing outward; and the oil mist discharged from the through hole is blocked by the cover plate, which ensures that the oil mist can act on the first bearing on the one hand, and prevents the impurity particles in the mixed gas from the intake pipe from entering the first bearing and damaging the rotating parts on the other hand.

[0011] Preferably, the shell is provided with a mounting hole, an air outlet pipe is installed in the mounting hole, and the air outlet pipe is composed of an inner tube and an outer tube that are plugged into each other; the outer tube is provided with a mounting groove, the inner tube extends into the mounting groove, a side wall of the mounting groove extends outward to form a pressure plate, the port of the mounting hole is provided with an annular groove, a first sealing ring is installed in the annular groove, a pressure ring is installed on the pressure plate, and the pressure ring is connected to the shell; the pressure ring squeezes the pressure plate so that the pressure plate squeezes the first sealing ring tightly against the annular groove for sealing. Through the above-mentioned arrangement, the pressure of the pressure ring on the pressure plate can be adjusted by changing the relative distance between the pressure ring and the shell, and the pressure ring can continuously provide the pressure for squeezing the first sealing ring to the pressure plate, and the pressure ring is tightly against the pressure plate and the annular groove, so as to form a seal between the inner tube, the outer tube and the mounting hole.

[0012] Preferably, the outer diameter of the outer tube is smaller than the inner diameter of the inner tube; a second sealing ring is installed between the outer wall of the outer tube and the inner wall of the inner tube, and the outer wall of the outer tube presses the second sealing ring tightly against the inner wall of the inner tube, so that the second sealing ring is radially sealed between the inner tube and the outer tube. Through the above arrangement, the connection between the inner tube and the outer tube can be sealed to prevent the gas in the outlet pipe from flowing to the first sealing ring, effectively reducing the sealing pressure of the first sealing ring.

[0013] Preferably, the inner wall of the mounting hole is provided with a step, and the step and the outer side wall of the inner tube are provided with mutually cooperating limiting structures so that the inner tube is limitedly installed in the mounting hole; an annular baffle is provided on the inner tube, and the annular baffle is close to the inner wall of the mounting hole; a separation groove is provided between the annular baffle and the port of the inner tube. Through the above arrangement, the insertion depth of the inner tube on the mounting hole can be limited, and the user does not need to judge the position based on intuition. When the inner tube is against the step, it is the correct installation point of the inner tube, and the inner tube can be prevented from rotating in the mounting hole through the limiting cooperation. A maze seal can be formed between the annular baffle and the step to prevent the oil in the shell from entering the first sealing ring and affecting the sealing effect; the separation groove can be used to collect a small amount of oil that accidentally seeps out of the annular baffle.

[0014] Preferably, the outer wall of the inner tube is provided with a plurality of oblique annular protrusions, and the end faces of the annular protrusions are coaxial with the rotating shaft. With the above arrangement, when the oil on the shell drops onto the outer wall of the inner tube, the annular protrusions can prevent the oil from climbing to the air inlet and causing pollution; and the oblique annular protrusions are coaxial with the rotating shaft, so that the oil that is not thrown onto the shell can be evenly thrown between adjacent annular protrusions under the action of centrifugal force.

[0015] Preferably, a base is installed at the lower part of the shell, and the rotating shaft partially extends into the base through the partition plate; a driving impeller is installed at the lower part of the rotating shaft, and an oil injection assembly is installed on the base, and the oil injection port of the oil injection assembly is aligned with the driving wheel of the driving impeller; a stepped groove is provided on the partition plate, and the driving impeller is provided with a stepped block, and the stepped groove cooperates with the stepped block to form a labyrinth seal. Through the above arrangement, the high-pressure oil in the oil injection assembly is sprayed toward the driving impeller to provide power for the rotation of the rotating shaft. After the high-pressure oil hits the driving impeller, it forms oil mist and enters the through hole to lubricate the first bearing and the second bearing; a labyrinth seal is formed at the gap between the stepped groove and the stepped block. When the oil in the sleeve flows in the gap of the labyrinth seal, it will reversely block the oil in the base below to prevent the oil in the base from entering the shell due to the pressure difference, resulting in a decrease in separation efficiency.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) When the machine is running, the oil mist in the base can enter the through hole under the action of air pressure to lubricate the first bearing and the second bearing, saving the operator the work of lubricating the bearings; the variable diameter hole plug can effectively reduce the amount of oil mist passing through, preventing a large amount of oil mist from entering the separation component and affecting the separation efficiency; in addition, the variable diameter hole plug with different apertures can be replaced according to actual needs to control the discharge amount of oil mist.

[0018] (2) When the oil on the partition plate splashes due to the vibration of the machine, the protective cover can play a blocking role to prevent the separated oil from splashing to the air inlet of the inner tube and causing pollution; with the anti-splashing effect of the protective cover, the air inlet on the inner tube can be opened larger, which helps to improve the air outlet efficiency of the machine.

[0019] (3) The oil in the sleeve can be discharged through the gap of the labyrinth seal, preventing the oil in the base from entering the shell due to the pressure difference, thereby improving the sealing performance of the partition plate.

[0020] (4) Sealing rings are installed at the connection between the shell and the outer tube and at the connection between the outer tube and the inner tube. The double-point sealing design can significantly improve the sealing between the outlet pipe and the shell; the multiple annular protrusions arranged on the inner tube can also prevent the oil attached to the outer wall of the inner tube from entering the air inlet on the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the centrifugal oil-gas separator in this application is shown in FIG. Figure 1 .

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0023] Figure 3 for Figure 1 An enlarged schematic diagram of part B in the middle.

[0024] Figure 4 Schematic diagram of the structure of the partition plate in this application.

[0025] Figure 5 Schematic diagram of the internal structure of the centrifugal oil-gas separator in this application.

[0026] Figure 6 It is a schematic diagram of the structure of the cover plate in this application.

[0027] Figure 7 It is a schematic diagram of the structure of the shell in this application.

[0028] Figure 8 The overall structure of the centrifugal oil-gas separator in this application is shown in FIG. Figure 2 .

[0029] Fig. 9 for Figure 8 Enlarged schematic diagram of the local C in the middle.

[0030] Fig.10 It is a schematic diagram of the structure of the inner tube in this application.

[0031] Fig.11 It is a schematic diagram of the structure of the outer tube in this application.

[0032] In the figure: 1, housing; 11, mounting portion; 12, mounting hole; 100, variable diameter plug; 101, first bearing; 102, second bearing; 110, annular baffle; 120, annular groove; 121, step; 122, limit groove; 2, separation assembly; 21, frame; 22, separation plate; 200, air inlet pipe; 210, annular sealing groove; 3, rotating shaft; 31, through hole; 32, perforation; 33, driving impeller; 300, cover plate ; 301, air vent; 330, step block; 4, partition plate; 41, sleeve; 42, oil outlet; 400, protective cover; 401, block; 5, inner tube; 51, annular baffle; 52, limit block; 53, partition groove; 54, annular protrusion; 55, air inlet; 500, first sealing ring; 501, second sealing ring; 6, outer tube; 61, mounting groove; 62, pressure plate; 600, pressure ring; 7, base; 71, fuel injection assembly. DETAILED DESCRIPTION

[0033] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0036] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0037] One aspect of the present application provides a centrifugal oil-gas separator, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one preferred embodiment includes a housing 1, a separation assembly 2 and a rotating shaft 3 connected to the separation assembly 2 are installed inside the housing 1, and the rotating shaft 3 drives the separation assembly 2 to rotate synchronously, so that the mixed gas is separated into oil and gas under the action of centrifugal force; wherein the separated oil is thrown to the inner wall of the housing 1. A through hole 31 with the same aperture is provided on the rotating shaft 3, and a variable diameter plug for changing the aperture of the through hole 31 is installed in the through hole 31, and a first bearing 101 is plugged on the rotating shaft 3; the oil mist in the housing 1 can pass through the through hole 31 and enter the first bearing 101 for lubrication. A partition plate 4 for supporting the rotating shaft 3 is provided below the housing 1, and the partition plate 4 is concave inwardly, and a sleeve 41 is provided at the lowest point of the end surface of the partition plate 4, and an oil outlet 42 is provided at the connection between the sleeve 41 and the partition plate 4; the oil on the inner wall of the housing 1 slides onto the partition plate 4 under the action of gravity, and passes through the oil outlet 42 under the guidance of the partition plate 4 into the sleeve 41 for discharge.

[0038] It should be noted that the variable diameter hole plug 100 can reduce the discharge amount of oil mist in the through hole 31, and prevent a large amount of oil mist from entering the separation component 2 through the through hole 31 and affecting the separation efficiency.

[0039] Specifically, Figure 1 and Figure 3 As shown, a protective cover 400 is installed on the sleeve 41, and the protective cover 400 is in a truncated cone shape. A stopper 401 is provided on the protective cover 400, and the stopper 401 extends toward the oil outlet 42 and partially blocks the oil outlet 42 to prevent the oil in the sleeve 41 from flowing back to the partition plate 4 under the vibration of the machine. A gap is left between the outer edge of the protective cover 400 and the end face of the partition plate 4, so that the oil on the inner wall of the housing 1 can flow to the oil outlet 42 through the gap; the protective cover 400 can also prevent the oil on the partition plate 4 from splashing into the air outlet pipe and causing pollution to the filtered gas.

[0040] Further, such as Figure 2 and Figure 5 As shown, an air intake pipe 200 is installed on the shell 1, and the air intake pipe 200 is connected to the separation component 2. The separation component 2 includes a frame 21 and a plurality of separation discs 22. The plurality of separation discs 22 are stacked in sequence in the frame 21, and a gap is left between two adjacent separation discs 22. In order to ensure that the separation discs 22 can be connected to each other, separation holes for ventilation are provided on the separation discs 22.

[0041] It can be understood that the mixed gas first enters the separation component 2 through the air inlet pipe 200, and then the mixed gas is evenly diffused to the gap between the separation disks 22 through the separation holes; when the separation component 2 is centrifuged, due to the large difference in mass between the oil and gas, the oil particles first slide outward along the disk surface of the separation disk 22 under the action of centrifugal force and leave the separation disk until they are thrown onto the inner wall of the shell 1 to complete the efficient separation of oil and gas.

[0042] In this embodiment, if Figure 2 and Figure 3 As shown, a mounting portion 11 is mounted on the housing 1, a first bearing 101 is mounted on the mounting portion 11, a second bearing 102 is mounted inside the sleeve 41, and the rotating shaft 3 is inserted into the first bearing 101 and the second bearing 102 in sequence, and the rotating shaft 3 can be limited by the first bearing 101 and the second bearing 102 to prevent the rotating shaft 3 from deflecting during the rotation process. Since the variable diameter hole plug 100 can significantly reduce the amount of oil mist passing through, the variable diameter hole plug 100 is arranged close to the first bearing 101 to ensure that the oil mist passing through the variable diameter hole plug 100 can quickly reach the first bearing 101.

[0043] Specifically, Figure 2 and Figure 3 As shown, a through hole 32 is provided on the rotating shaft 3 near the second bearing 102, and the through hole 32 is connected to the through hole 31. When the oil mist enters the through hole 31, a part of the oil mist can directly pass through the through hole 32 during the flow process and act on the second bearing 102; the other part of the oil mist blocked by the variable diameter hole plug 100 adheres to the inner wall of the through hole 31 and accumulates into oil droplets, and then slides out of the through hole 31 under the action of gravity, wherein the oil droplets on the same line as the through hole 32 can pass through the through hole 32 and enter the second bearing 102 for lubrication.

[0044] It should be added that the installation method of the reducer hole plug 100 and the rotating shaft 3 is detachable. Therefore, the reducer hole plug 100 of different specifications can be replaced according to actual needs to control the amount of oil mist passing through; the traditional method of opening a stepped hole on the rotating shaft 3 to reduce the amount of oil mist passing through is avoided; and the processing cost of the rotating shaft 3 is further reduced.

[0045] In this embodiment, if Figure 2 As shown, an annular sealing groove 210 coaxial with the rotating shaft 3 is provided on the frame 21, and an annular baffle 110 is provided at the lower part of the mounting portion 11, and the annular baffle 110 is inserted into the annular sealing groove 210; when the frame 21 rotates, the separation component 2 rotates along the track of the annular sealing groove 210 with the cooperation of the annular sealing groove 210 and the annular baffle 110.

[0046] It is understandable that the annular baffle 110 and the annular sealing groove 210 can also cooperate to form a labyrinth seal with a certain gap, wherein the end face of the annular baffle 110 cooperates with the inner side wall of the annular sealing groove 210 to form a cutoff gap with a smaller gap, and the top of the annular baffle 110 cooperates with the bottom of the annular sealing groove 210 to form an expansion cavity with a larger gap. According to the principles of fluid mechanics, when the oil-gas mixture enters the cutoff gap, the flow rate of the mixed gas increases and flows to the expansion cavity; since the volume of the expansion cavity is larger than the cutoff gap, the mixed gas can form a vortex in the expansion cavity, so that the flow rate of the mixed gas is close to zero, so that the oil-gas mixture passing through the intake pipe 200 smoothly enters the interior of the separation component 2 without diffusing outward.

[0047] It should be known that since the mixed gas in the intake pipe 200 flows downward, if the first bearing 101 is not blocked, it is easy for foreign particles entrained in the mixed gas to enter the rotating parts of the first bearing 101 and cause malfunction.

[0048] In view of the above situation, in some embodiments of the present application, such as Figure 2 and Figure 6 As shown, a cover plate 300 is installed on the mounting portion 11 to block the oil mist in the through hole 31, which ensures that the oil mist can act on the first bearing 101, and prevents the impurity particles in the mixed gas from entering the first bearing 101. In addition, a plurality of vents 301 are arranged on the peripheral side of the cover plate 300, and the separation component 2 is connected to the intake pipe 200 through the vents 301; when the mixed gas reaches the cover plate 300, it can be dispersed by the plurality of vents 301, ensuring that the mixed gas can be divided into multiple streams and evenly flow into the separation component 2, thereby improving the separation efficiency of the separation component 2.

[0049] In this embodiment, if Figure 7 , Figure 8 and Fig. 9 As shown, the housing 1 is provided with a mounting hole 12, in which an air outlet pipe is installed, which consists of two inner tubes 5 and outer tubes 6 plugged into each other, and the outer tube 6 is provided with a mounting groove 61, and one side wall of the mounting groove 61 extends outward to form a pressing plate 62; an annular groove 120 is provided on the port of the mounting hole 12, in which a first sealing ring 500 is installed; and a pressing ring 600 connected to the housing 1 is installed on the pressing plate 62. During installation, tightening the fasteners on the pressing ring 600 can change the relative distance between the pressing ring 600 and the housing 1, thereby driving the pressing plate 62 to squeeze the first sealing ring 500 close to the annular groove 120 for sealing.

[0050] It can be understood that the inner tube 5 , the outer tube 6 and the mounting hole 12 can be sealed by the first sealing ring 500 .

[0051] Specifically, Fig. 9 , Fig.10 and Fig.11 As shown, the outer diameter of the outer tube 6 is smaller than the inner diameter of the inner tube 5, so that the outer tube 6 can be inserted into the inner tube 5. A second sealing ring 501 is installed between the outer wall of the outer tube 6 and the inner wall of the inner tube 5, and the outer wall of the outer tube 6 presses the second sealing ring 501 tightly against the inner wall of the inner tube 5, so that the second sealing ring 501 is radially sealed between the inner tube 5 and the outer tube 6.

[0052] It can be understood that the second sealing ring 501 can cooperate with the first sealing ring 500 to provide a stronger sealing effect for the machine, which helps to reduce the pressure of the first sealing ring 500; on the one hand, it can prevent the gas from flowing from the connection between the inner tube 5 and the outer tube 6 to the first sealing ring 500, and on the other hand, it can make part of the gas acting on the first sealing ring 500 flow to the second sealing ring 501 and be sealed by the second sealing ring 501.

[0053] Further, such as Figure 7 , Fig. 9 and Fig.10 As shown, the inner wall of the mounting hole 12 is provided with a step 121, a limiting groove 122 is provided on the step 121, and a limiting block 52 is provided on the inner tube 5; when the inner tube 5 is plugged into the mounting hole 12, the limiting block 52 is inserted into the limiting groove 122 to radially limit the inner tube 5.

[0054] It is understandable that, through the positioning and cooperation between the stop block 52 and the stop groove 122, the user does not need to judge the insertion depth of the inner tube 5 and the mounting hole 12 based on intuition. When the end of the inner tube 5 abuts against the step 121, it is the correct installation point. In addition, a labyrinth seal can be formed between the annular retaining strip 51 and the inner wall of the mounting hole 12 to prevent the oil in the housing 1 from entering the first sealing ring 500 and affecting the sealing effect.

[0055] Furthermore, Fig. 9 and Fig.10 As shown, an annular baffle 51 is provided on the inner tube 5, and a separation groove 53 is provided between the annular baffle 51 and the port of the inner tube 5. When the inner tube 5 is plugged into the mounting hole 12, the annular baffle 51 is close to the inner wall of the mounting hole 12 to form a maze seal, which effectively prevents the oil in the housing 1 from entering the first sealing ring 500 and affecting the sealing effect; the separation groove 53 can be used to collect a small amount of oil that accidentally seeps out of the annular baffle 51.

[0056] In this embodiment, if Fig.10As shown, a plurality of oblique annular protrusions 54 are provided on the outer wall of the inner tube 5, and the end face of the annular protrusion 54 is coaxial with the rotation direction of the rotating shaft 3. When oil on the shell 1 drips onto the outer wall of the inner tube 5, the annular protrusion 54 can effectively prevent the oil droplets from climbing to the air inlet 55 and causing pollution; and the oblique annular protrusions 54 can make the oil that is not thrown onto the shell 1 be evenly thrown between two adjacent annular protrusions 54 under the action of centrifugal force.

[0057] In this embodiment, if Figure 1 and Figure 3 As shown, a base 7 is installed at the lower part of the housing 1, and the rotating shaft 3 is installed inside the base 7 through the partition plate 4; a driving impeller 33 is installed at the lower part of the rotating shaft 3, and an oil injection assembly 71 is installed at the side of the base 7, and the oil injection port of the oil injection assembly 71 is aligned with the driving wheel of the driving impeller 33. The oil injection assembly 71 sprays high-pressure oil to the driving impeller 33 to drive the rotating shaft 3 to rotate; and the oil mist generated by the high-pressure oil hitting the driving impeller 33 can enter the through hole 31 to lubricate the first bearing 101 and the second bearing 102.

[0058] Further, such as Figure 3 As shown, a stepped groove is provided on the partition plate 4, and a stepped block 330 is provided on the driving impeller 33. The stepped groove cooperates with the stepped block 330 to form a labyrinth seal. When the oil in the sleeve 41 flows in the gap of the labyrinth seal, it will reversely block the oil in the base 7 below, thereby preventing the oil in the base 7 from entering the shell 1 due to the pressure difference and reducing the separation efficiency.

[0059] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A centrifugal oil-gas separator, comprising a housing (1), characterized in that: A separation assembly (2) and a rotating shaft (3) connected to the separation assembly (2) are installed in the housing (1), and the rotating shaft (3) is used to drive the separation assembly (2) to rotate synchronously; a through hole (31) with a uniform hole diameter is provided on the rotating shaft (3), a reducing hole plug (100) is installed in the through hole (31), and a first bearing (101) is installed on the rotating shaft (3); a partition plate (4) for supporting the rotating shaft (3) is provided below the housing (1), and the partition plate ( 4) is concave inwards, a sleeve (41) is provided at the lowest point of the partition plate (4); an oil outlet (42) is provided at the connection between the sleeve (41) and the partition plate (4), a protective cover (400) for preventing oil splashing is installed on the sleeve (41), a block (401) is provided on the protective cover (400), and the block (401) partially blocks the oil outlet (42); a gap is left between the outer edge of the protective cover (400) and the end face of the partition plate (4).

2. The centrifugal oil-gas separator according to claim 1, characterized in that: An air intake pipe is installed on the shell (1), and the air intake pipe is connected to the separation component (2); the separation component (2) comprises a frame (21) and a separation disc (22), and the separation disc (22) is provided with a separation hole for ventilation; the number of the separation discs (22) is multiple, and the multiple separation discs (22) are stacked in sequence in the frame (21), and a gap is left between two adjacent separation discs (22).

3. The centrifugal oil-gas separator according to claim 1, characterized in that: The housing (1) is provided with a mounting portion (11), the first bearing (101) is mounted on the mounting portion (11), and the sleeve (41) is provided with a second bearing (102); the rotating shaft (3) is sequentially plugged into the first bearing (101) and the second bearing (102).

4. The centrifugal oil-gas separator according to claim 1 or 3, characterized in that: The variable diameter hole plug (100) is close to the first bearing (101), and a through hole (32) is provided on the rotating shaft (3), and the through hole (32) is close to the second bearing (102).

5. The centrifugal oil-gas separator according to claim 2 or 3, characterized in that: An annular sealing groove (210) is provided on the frame (21), and an annular baffle (110) is provided below the mounting portion (11), and the annular baffle (110) extends into the annular sealing groove (210); a cover plate (300) is installed on the mounting portion (11), and the cover plate (300) is used to block the gas in the through hole (31); a vent hole (301) is provided on the peripheral side of the cover plate (300), and the separation component (2) is connected to the air intake pipe through the vent hole (301).

6. The centrifugal oil-gas separator according to claim 1, characterized in that: The shell (1) is provided with a mounting hole (12), an air outlet pipe is installed in the mounting hole (12), and the air outlet pipe is composed of an inner tube (5) and an outer tube (6) which are plugged into each other; the outer tube (6) is provided with a mounting groove (61), the inner tube (5) extends into the mounting groove (61), and a side wall of the mounting groove (61) extends outward to form a pressure plate (62); the port of the mounting hole (12) is provided with an annular groove (120), and a first sealing ring (500) is installed in the annular groove (120); a pressing ring (600) is installed on the pressure plate (62), the pressing ring (600) is connected to the shell (1), and the pressing ring (600) presses the pressure plate (62) so that the pressure plate (62) presses the first sealing ring (500) tightly against the annular groove (120) for sealing.

7. The centrifugal oil-gas separator according to claim 6, characterized in that: The outer diameter of the outer tube (6) is smaller than the inner diameter of the inner tube (5); a second sealing ring (501) is installed between the outer wall of the outer tube (6) and the inner wall of the inner tube (5); the outer wall of the outer tube (6) presses the second sealing ring (501) tightly against the inner wall of the inner tube (5), so that the second sealing ring (501) is radially sealed between the inner tube (5) and the outer tube (6).

8. The centrifugal oil-gas separator according to claim 6, characterized in that: The inner wall of the mounting hole (12) is provided with a step (121), and the step (121) and the outer wall of the inner tube (5) are provided with mutually matching limiting structures, so that the inner tube (5) is limitedly installed in the mounting hole (12); the inner tube (5) is provided with an annular retaining strip (51), and the annular retaining strip (51) is close to the inner wall of the mounting hole (12); and a separation groove (53) is provided between the annular retaining strip (51) and the port of the inner tube (5).

9. The centrifugal oil-gas separator according to claim 1 or 6, characterized in that: A plurality of oblique annular protrusions (54) are provided on the outer wall of the inner tube (5), and the end faces of the annular protrusions (54) are coaxial with the rotating shaft (3).

10. The centrifugal oil-gas separator according to claim 1, characterized in that: A base (7) is installed at the lower part of the shell (1), and the rotating shaft (3) partially passes through the partition plate (4) and extends into the base (7); a driving impeller (33) is installed at the lower part of the rotating shaft (3), and an oil injection assembly (71) is installed on the base (7), and the oil injection port of the oil injection assembly (71) is aligned with the driving wheel of the driving impeller (33); a stepped groove is provided on the partition plate (4), and the driving impeller (33) is provided with a stepped block (330), and the stepped groove cooperates with the stepped block (330) to form a labyrinth seal.

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