Oil separator and air compressor unit

Abstract

The utility model provides an oil separator and an air compressor unit. The oil separator comprises an outer cylinder piece, an inner cylinder piece and an oil separation core. The outer cylinder piece comprises an outer cylinder body and an air inlet pipe. The inner cylinder piece comprises an inner cylinder body, an upper partition plate and a lower partition plate. The inner cylinder piece and the oil separation core are both arranged in the outer cylinder body, and the air inlet pipe is connected to the outer cylinder body in a tangent mode. The upper partition plate sleeves one end of the inner barrel body, and the lower partition plate sleeves one end, away from the upper partition plate, of the inner barrel body. A coarse separation cavity is defined by the upper partition plate, the outer wall of the inner barrel body, the lower partition plate and the inner wall of the outer barrel body, and the air inlet pipe communicates with the coarse separation cavity. Through the arrangement, the oil-gas mixture can be subjected to primary separation, the load of subsequent fine separation of the oil-gas mixture is reduced, and the turbulent flow phenomenon of the oil-gas mixture can be reduced through the coarse separation cavity.

Description

Technical Field

[0001] This application relates to the field of oil separation, and particularly to an oil separator and an air compressor unit. Background Art

[0002] With the rapid development of industrial technology, the technology of air compressor units has become increasingly mature and is widely used in various industries. As one of the important components of an air compressor unit, the oil-gas separation effect of an oil separator directly affects the performance of the air compressor unit. In the existing vertical oil separation cylinder with upper air intake, after the oil-gas mixture enters the oil separation cylinder body, the fluid tangentially flushes the inner wall of the oil separation cylinder and undergoes rough separation under the action of centrifugal force. At this time, most of the lubricating oil flows down along the inner wall of the cylinder, and smaller oil droplets are carried by the compressed air and enter the oil separation core along the annular cavity of the inner cylinder for secondary fine separation. However, since the cross-sectional area of the annular cavity formed by the inner and outer cylinder parts of the cylinder body remains unchanged, when the oil-gas mixture enters the larger annular cavity, it is easy to cause a lower centrifugal force on the oil droplets, ultimately resulting in insufficient pre-separation of oil and gas. And due to the limitations of the oil separation core size and the flow velocity requirements of the annular cavity, the cylinder body specifications are generally large, which is not conducive to the internal structure layout of the compressor unit and has a high processing and manufacturing cost.

[0003] With the increasing coverage of the air supply pressure range of oil-injected screw compressors and the growing demand in low-pressure application industries, when the oil separator in the existing intake oil-gas separation system is in a low-pressure working condition, the specific gravity and flow velocity of the oil-gas two-phase flow change, easily forming an oil-gas turbulent flow phenomenon, resulting in insufficient pre-separation efficiency during oil-gas separation and a high oil content in the separated compressed air; moreover, there is no flow stabilizing device at the bottom of the existing oil separator, and the liquid level is prone to fluctuate under working conditions with a large oil-gas treatment capacity.

[0004] Therefore, it is necessary to provide an improved oil separator to solve some or all of the above problems. Utility Model Content

[0005] This application provides an oil separator and an air compressor unit with high oil-gas separation efficiency.

[0006] This application provides an oil separator, including an outer cylinder part, an inner cylinder part, and an oil separation core; the outer cylinder part includes an outer cylinder main body and an air inlet pipe; the inner cylinder part includes an inner cylinder main body, an upper partition plate, and a lower partition plate; the inner cylinder part and the oil separation core are both arranged inside the outer cylinder main body, and the air inlet pipe is tangentially connected to the outer cylinder main body;

[0007] The upper partition plate is sleeved at one end of the inner cylinder main body, and the lower partition plate is sleeved at the end of the inner cylinder main body far from the upper partition plate; the upper partition plate, the outer wall of the inner cylinder main body, the lower partition plate, and the inner wall of the outer cylinder main body enclose a rough separation chamber, and the air inlet pipe is communicated with the rough separation chamber.

[0008] Further, the intake pipe is disposed adjacent to the upper partition and is located below the upper partition; the outer diameter of the inner cylinder body gradually increases from top to bottom.

[0009] Further, along the direction perpendicular to the axis of the inner cylinder body, the angle A between the projection of the outer wall of the inner cylinder body and the axis of the inner cylinder body is not greater than 5 degrees and not less than 2 degrees.

[0010] Further, the wall thickness of the inner cylinder body is uniformly arranged.

[0011] Further, the inner cylinder body is provided with flow holes; the flow holes are adjacent to the lower partition and are located below the intake pipe; the rough separation chamber is communicated with the cavity of the inner cylinder body through the flow holes, and the cavity of the inner cylinder body is communicated with the fine separation chamber of the outer cylinder body that houses the oil separation core.

[0012] Further, a plurality of flow holes are provided and are arranged at intervals around the circumference of the inner cylinder body; the outlet end of the intake pipe is arranged away from the flow holes; the total area of the tangential planes of the flow holes is greater than the cross-sectional area of the outlet end of the intake pipe.

[0013] Further, the upper partition includes a first outer periphery and a first inner periphery; the first outer periphery is fixed to the inner wall of the outer cylinder body, and the first inner periphery is sleeved on the end of the inner cylinder body; along the axial direction of the inner cylinder body, the outer diameter of the upper partition gradually decreases from the first outer periphery to the first inner periphery.

[0014] Further, the lower partition includes a second outer periphery and a second inner periphery; the second outer periphery is fixed to the inner wall of the outer cylinder body, and the second inner periphery is sleeved on the other end of the inner cylinder body; along the axial direction of the inner cylinder body, the outer diameter of the upper partition gradually increases from the second inner periphery to the second outer periphery.

[0015] Further, the lower partition is provided with an oil passage groove and a ventilation hole; the oil passage groove is recessed from the second outer periphery to the second inner periphery; the oil passage groove and the ventilation hole are both arranged at intervals around the circumference of the lower partition; the rough separation chamber is communicated with the oil storage chamber of the outer cylinder body through the oil passage groove and the ventilation hole.

[0016] Further, the inner cylinder member further includes an inner partition; the inner partition is located in the cavity of the inner cylinder body and is at the same end of the inner cylinder body as the lower partition.

[0017] Further, the inner diameter of the inner partition increases from top to bottom; the inner partition includes an oil leakage hole, and the oil leakage hole is provided at the center of the inner partition.

[0018] Further, the outer cylinder member further includes a flow stabilizing plate; the flow stabilizing plate is located below the lower partition plate and is connected to the inner wall of the outer cylinder body.

[0019] Further, the intake pipe includes a pipe body, a welding plate, and a baffle; the welding plate is sleeved on the pipe body and fixed to the inner wall of the outer cylinder body; the baffle is inclined from the middle region of the intake pipe to the outlet end of the intake pipe, and the cross-section of the intake pipe gradually decreases from the middle region of the intake pipe to the outlet end of the intake pipe.

[0020] The present application further provides an air compressor unit, including a compressor and the oil separator as described above; the oil separator is connected to the compressor.

[0021] Compared with the prior art, the oil separator of the present application is tangentially arranged on the outer cylinder body through the intake pipe, so that the oil-gas mixture enters the outer cylinder body tangentially, avoiding the reduction of the flow velocity of the oil-gas mixture, and improving the separation effect of the oil-gas mixture. At the same time, the upper partition plate, the outer wall of the inner cylinder body, the lower partition plate, and the inner wall of the outer cylinder body enclose a rough separation chamber, and the intake pipe communicates with the rough separation chamber, which can perform primary separation on the oil-gas mixture, reduce the load of the subsequent fine separation of the oil-gas mixture, and reduce the turbulent flow phenomenon of the oil-gas mixture through the rough separation chamber.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0024] Figure 1 is a perspective view of the oil separator of the present application.

[0025] Figure 2 is Figure 1 a perspective view of the oil separator after partial section in

[0026] Figure 3 is Figure 1 a side view of the oil separator in

[0027] Figure 4 is Figure 3 a sectional view of the oil separator about B-B in

[0028] Figure 5 is Figure 3 a sectional view of the oil separator about C-C in

[0029] Figure 6 is Figure 1Stereogram of the intake pipe in the oil separator.

[0030] Figure 7 is Figure 1 Stereogram of the intake pipe in the oil separator from another perspective.

[0031] Figure 8 is Figure 2 Stereogram of the inner cylinder part in the oil separator.

[0032] Figure 9 is Figure 8 Cross-sectional view of the inner cylinder part with respect to D-D.

[0033] Figure 10 is Figure 8 Stereogram of the assembly of the lower partition board and the inner partition board in the inner cylinder part.

[0034] Explanation of the reference numerals in the attached drawings: 1 - outer cylinder part; 11 - outer cylinder main body; 111 - fine separation chamber; 112 - oil storage chamber; 113 - oil discharge hole; 114 - sewage discharge hole; 115 - oil filling hole; 116 - oil liquid observation hole; 12 - intake pipe; 121 - pipe main body; 122 - welding plate; 123 - baffle plate; 124 - connecting flange; 125 - reinforcing rib; 13 - rough separation chamber; 14 - flow stabilizing plate; 15 - mounting bracket; 16 - pedal part; 2 - inner cylinder part; 21 - inner cylinder main body; 211 - through-flow hole; 212 - cavity of the inner cylinder main body; 22 - upper partition board; 221 - first periphery; 222 - first inner periphery; 23 - lower partition board; 231 - second periphery; 232 - second inner periphery; 233 - oil through-flow groove; 234 - ventilation hole; 24 - inner partition board; 241 - oil leakage hole; 3 - oil separation core; 31 - oil separation core main body; 32 - flange plate. Detailed implementation mode

[0035] Here, the technical solutions in the embodiments (or "implementation modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If there are terms related to directional indication or positional relationship in the embodiments of the present application (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), then such terms are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0037] Such asFigures 1 to 5 As shown in the figure, the oil separator of the present application includes an outer cylinder member 1, an inner cylinder member 2, and an oil separation core 3. The inner cylinder member 2 and the oil separation core 3 are both disposed inside the outer cylinder member 1. The oil-gas mixture is roughly separated between the outer cylinder member 1 and the inner cylinder member 2, and the oil-gas mixture enters the oil separation core 3 for fine separation of the oil and gas.

[0038] In one embodiment, the outer cylinder member 1 includes an outer cylinder main body 11, an intake pipe 12, a rough separation chamber 13, a flow stabilizing plate 14, a mounting bracket 15, and a pedal member 16. The inner cylinder member 2 and the oil separation core 3 are both disposed inside the outer cylinder main body 11. A rough separation chamber 13 is formed between the inner cylinder member 2 and the inner wall of the outer cylinder main body 11. The intake pipe 12 is tangentially connected to the outer cylinder main body 11 and is in communication with the rough separation chamber 13. The oil-gas mixture tangentially flows into the outer cylinder main body 11 from the intake pipe 12. With such a setting, it is convenient for the oil-gas mixture to tangentially enter the rough separation chamber 13 and enables the oil-gas mixture to flow along the inner wall of the outer cylinder main body 11, avoiding a decrease in the flow rate of the oil-gas mixture, and thus improving the separation effect of the oil liquid in the oil-gas mixture.

[0039] The outer cylinder main body 11 includes a fine separation chamber 111, an oil storage chamber 112, an oil discharge hole 113, a sewage discharge hole 114, an oil filling hole 115, and an oil liquid observation hole 116. Along the height direction of the outer cylinder main body 11, the fine separation chamber 111 is located above the inner cylinder member 2 and is in communication with the rough separation chamber 13. The oil separation core 3 is located in the fine separation chamber 111. The oil storage chamber 112 is located below the inner cylinder member 2 and is used to store the separated oil liquid.

[0040] Both the oil discharge hole 113 and the sewage discharge hole 114 are provided on the bottom wall of the outer cylinder main body 11 and are in communication with the oil storage chamber 112. The sewage discharge hole 114 is located at the center of the bottom of the outer cylinder main body 11 to facilitate the discharge of sundries such as oil slag from the outer cylinder main body 11. The oil filling hole 115 and the oil liquid observation hole 116 are located on the circumferential wall of the outer cylinder main body 11.

[0041] Further combined Figure 6 with Figure 7 As shown in the figure, the intake pipe 12 includes a pipe main body 121, a welding plate 122, a baffle 123, a connecting flange 124, and a reinforcing rib 125. The pipe main body 121 is disposed on the outer cylinder main body 11, and a part of the pipe main body 121 is located in the rough separation chamber 13. The welding plate 122 is sleeved on the pipe main body 121 and is fixed to the inner wall of the outer cylinder main body 11. The welding plate 122 is arc-shaped.

[0042] The baffle plate 123 is inclined from the middle region of the air inlet pipe 12 to the outlet end of the air inlet pipe 12, and the baffle plate 123 is located in the rough separation chamber 13. The cross-section of the air inlet pipe 12 gradually decreases from the middle region of the air inlet pipe 12 to the outlet end of the air inlet pipe 12. With such a setting, the flow rate of the oil-gas mixture flowing out of the air inlet pipe 12 is increased, and at the same time, when the oil-gas mixture flows out of the air inlet pipe 12, it is prevented from directly hitting the inner cylinder member 2, so that the oil-gas mixture can flow along the inner wall of the outer cylinder main body 11, increasing the separation efficiency of the oil-gas mixture.

[0043] The connecting flange 124 is located at the inlet end of the pipe body 121. The reinforcing ribs 125 are arranged on the pipe body 121 and are respectively connected to the welding plate 122 and the connecting flange 124, so as to increase the strength of the air inlet pipe 12 and reduce the vibration generated when the oil-gas mixture flows through the air inlet pipe 12. To further improve the strength of the air inlet pipe 12, a plurality of reinforcing ribs 125 are provided and are arranged at intervals along the circumferential direction of the pipe body 121.

[0044] The flow stabilizing plate 14 is located at the bottom of the outer cylinder main body 11 and is in the oil storage chamber 112. The flow stabilizing plate 14 is used to block the oil liquid fluctuation, thereby preventing the oil separator from shaking and making the oil separator operate more stably and reliably. The flow stabilizing plate 14 is located above the bottom wall of the outer cylinder main body 11 and is spaced from the bottom wall of the outer cylinder main body 11. With such a setting, it is avoided that the flow stabilizing plate 14 blocks the oil discharge hole 113 and the sewage discharge hole 114. A plurality of flow stabilizing plates 14 are provided and are combined into a structure such as a straight line type, a cross type or a rice type.

[0045] The mounting brackets 15 and the pedal members 16 are both arranged on the circumferential wall of the outer cylinder main body 11 and a plurality of them are provided. The mounting brackets 15 are used to mount the oil separator and are symmetrically arranged on the circumferential wall of the outer cylinder main body 11. It is true that to improve the installation stability of the oil separator, a plurality of mounting brackets 15 are provided and are arranged at intervals along the circumferential direction of the outer cylinder main body 11. The mounting brackets 15 are located in the bottom region of the outer cylinder main body 11. The pedal members 16 are used to provide a stepping position for the staff to climb the outer cylinder main body 11. A plurality of pedal members 16 are provided and are arranged at intervals on the circumferential wall of the outer cylinder main body 11.

[0046] Further in combination with Figures 8 to 10 As shown, in an embodiment, the inner cylinder member 2 includes an inner cylinder main body 21, an upper partition plate 22, a lower partition plate 23 and an inner partition plate 24. The upper partition plate 22 is sleeved on one end of the inner cylinder main body 21 and is fixed to the inner wall of the outer cylinder main body 11. The lower partition plate 23 is sleeved on the end of the inner cylinder main body 21 far from the upper partition plate 22 and is fixed to the inner wall of the outer cylinder main body 11. The upper partition plate 22, the outer wall of the inner cylinder main body 21, the lower partition plate 23 and the inner wall of the outer cylinder main body 11 enclose a rough separation chamber 13. The oil-gas mixture performs preliminary oil-gas separation in the rough separation chamber 13 along the inner wall of the outer cylinder main body 11.

[0047] The intake pipe 12 is disposed adjacent to the upper partition plate 22 and is located below the upper partition plate 22. The flow stabilizing plate 14 is located below the lower partition plate 23 and is connected to the inner wall of the outer cylinder main body 44.

[0048] The inner cylinder main body 21 is provided with a flow-through hole 211. The flow-through hole 211 is adjacent to the lower partition plate 23 and is located below the intake pipe 12. The rough separation chamber 13 communicates with the cavity 212 of the inner cylinder main body 21 through the flow-through hole 211, and the cavity 212 of the inner cylinder main body 21 communicates with the fine separation chamber 111 of the outer cylinder main body 11 that houses the oil separation core 3.

[0049] A plurality of flow-through holes 211 are provided and are arranged at intervals in the circumferential direction of the inner cylinder main body 21. The outlet end of the intake pipe 12 is arranged away from the flow-through holes 211. Specifically, the outlet end of the intake pipe 12 is located between two flow-through holes 211. After the oil-gas mixture flowing out of the intake pipe 12 has flowed at least a certain distance, it then enters the cavity 212 of the inner cylinder main body 21 through the flow-through holes 211.

[0050] The total area of the tangential planes of the flow-through holes 211 is larger than the cross-sectional area of the outlet end of the intake pipe 12. Specifically, the flow-through holes 211 are arranged in a quadrilateral shape, and the sum of the total areas of the flat planes formed by connecting the four corners of the plurality of flow-through holes 211 is larger than the cross-sectional area of the outlet end of the intake pipe 12. With such an arrangement, it is easier for the oil-gas mixture after rough separation to enter the cavity 212 of the inner cylinder main body 21 from the flow-through holes 211, and then enter the fine separation chamber 111, and is finely separated by the oil separation core 3.

[0051] The outer diameter of the inner cylinder main body 21 gradually increases from top to bottom. Further, the inner diameter of the outer cylinder main body 11 is uniformly arranged, and along the height direction of the outer cylinder main body 11, the cross-sectional area of the rough separation chamber 13 gradually decreases from top to bottom. With such an arrangement, the flow of the oil-gas mixture can be guided, so that the oil-gas mixture flows from top to bottom in the rough separation chamber 13, effectively preventing the oil-gas mixture from appearing turbulent, and at the same time avoiding the phenomenon of insufficient flow velocity when the oil-gas mixture enters the lower end of the rough separation chamber 13, thereby improving the separation efficiency of the oil-gas mixture. The outer wall of the inner cylinder main body 21 can also guide the oil liquid to flow downward.

[0052] Along the direction perpendicular to the axis of the inner cylinder main body 21, the included angle A between the projection of the outer wall of the inner cylinder main body 21 and the axis of the inner cylinder main body 21 is not greater than 5 degrees and not less than 2 degrees. With such an arrangement, the oil-gas mixture is prevented from appearing turbulent and having insufficient flow velocity. Specifically, if the included angle A is greater than 5 degrees, the upper space of the rough separation chamber 13 will be relatively large, which will lead to the appearance of turbulent flow in the oil-gas mixture, affecting the separation efficiency of the oil-gas mixture. If the included angle A is less than 2 degrees, it will affect the guidance of the oil-gas mixture flow in the rough separation chamber 13, resulting in low initial rough separation efficiency of the oil-gas mixture.

[0053] In the present application, since the distance between the projection of the outer wall of the inner cylinder main body 21 and the axis of the inner cylinder main body 21 is relatively large, the included angle A is represented by the included angle A' between the projection of the outer wall of the inner cylinder main body 21 and the straight line parallel to the axis of the inner cylinder main body 21.

[0054] The wall thickness of the inner cylinder main body 21 is uniformly arranged. Specifically, the inner diameter of the inner wall of the inner cylinder main body 21 gradually increases from top to bottom, and the inner wall of the inner cylinder main body 21 is coaxially arranged with the outer wall of the inner cylinder main body 21. Along the axial direction of the inner cylinder main body 21, the difference between the inner diameter of the inner wall of the inner cylinder main body 21 and the outer diameter of the inner cylinder main body 21 is the same at any position of its axis. With such an arrangement, after the oil-gas mixture flows through the flow hole 211, the inner wall of the inner cylinder main body 21 can effectively prevent the separated oil liquid from being carried to the fine separation chamber 111 from the inner wall of the inner cylinder main body 21, thereby improving the initial rough separation efficiency of the oil-gas mixture.

[0055] The upper partition plate 22 includes a first outer periphery 221 and a first inner periphery 222. The first outer periphery 221 is fixed to the inner wall of the outer cylinder main body 11, and the first inner periphery 222 is sleeved on the end of the inner cylinder main body 21. Along the axial direction of the inner cylinder main body 21, the outer diameter of the upper partition plate 22 gradually decreases from the first outer periphery 221 to the first inner periphery 222. With such an arrangement, it is convenient to guide the separated oil liquid and the oil-gas mixture to flow downward.

[0056] The lower partition plate 23 includes a second outer periphery 231 and a second inner periphery 232. The second outer periphery 231 is fixed to the inner wall of the outer cylinder main body 11, and the second inner periphery 232 is sleeved on the other end of the inner cylinder main body 21. Along the axial direction of the inner cylinder main body 21, the outer diameter of the upper partition plate 22 gradually increases from the second inner periphery 232 to the second outer periphery 231. With such an arrangement, it is convenient to guide the separated oil liquid to flow so that the oil liquid enters the oil storage chamber 112 of the outer cylinder main body 11.

[0057] The lower partition plate 23 is provided with an oil through groove 233 and a vent hole 234. The oil through groove 233 is recessed from the second outer periphery 231 to the second inner periphery 232, and the vent hole 234 is located between the second outer periphery 231 and the second inner periphery 232. Both the oil through groove 233 and the vent hole 234 are arranged at intervals around the circumferential direction of the lower partition plate 23. Along the circumferential direction of the lower partition plate 23, the oil through groove 233 and the vent hole 234 are alternately arranged.

[0058] The rough separation chamber 13 is communicated with the oil storage chamber 112 of the outer cylinder main body 11 through the oil through groove 233 and the vent hole 234. The oil through groove 233 is mainly used to guide the oil liquid to flow from the rough separation chamber 13 into the oil storage chamber 112, and the vent hole 234 is mainly used to guide the oil-gas mixture to flow from the rough separation chamber 13 into the oil storage chamber 112.

[0059] The inner partition plate 24 is located in the cavity 212 of the inner cylinder body 21 and is at the same end of the inner cylinder body 21 as the lower partition plate 23. The inner partition plate 24 is located between the oil storage cavity 112 and the cavity 212 of the inner cylinder body 21, and the inner partition plate 24 is used to prevent the oil foam in the oil storage cavity 112 from entering the cavity 212 of the inner cylinder body 21, so that the oil separator operates more stably and reliably. The inner partition plate 24 is arranged in a conical shape, and the inner diameter of the inner partition plate 24 increases from top to bottom to facilitate the flow of oil liquid and the convergence of oil liquid. The inner partition plate 24 includes an oil leakage hole 241, and the oil leakage hole 241 is arranged at the center of the inner partition plate 24. The oil storage cavity 112 and the cavity 212 of the inner cylinder body 21 are communicated through the oil leakage hole 241 to facilitate the oil liquid at the inner partition plate 24 to flow into the oil storage cavity 112.

[0060] In one embodiment, the oil separation core 3 includes an oil separation core body 31 and a flange 32. The oil separation core body 31 is connected to the flange 32, and the flange 32 is arranged at the upper end of the outer cylinder body 11.

[0061] In the oil separator of the present application, the intake pipe 12 is tangentially arranged on the outer cylinder body 11, so that the oil-gas mixture enters the outer cylinder body 11 tangentially, avoiding the reduction of the flow rate of the oil-gas mixture, and improving the separation effect of the oil-gas mixture. At the same time, the upper partition plate 22, the outer wall of the inner cylinder body 21, the lower partition plate 23 and the inner wall of the outer cylinder body 11 enclose a rough separation cavity 13, and the intake pipe 12 is communicated with the rough separation cavity 13, which can perform primary separation on the oil-gas mixture, reduce the load of the subsequent fine separation of the oil-gas mixture, and reduce the turbulence phenomenon of the oil-gas mixture through the rough separation cavity 13.

[0062] Since the outer cylinder body 11 of the oil separator mainly divides the upper, middle and lower regions of the internal space into a fine separation cavity 111, a rough separation cavity 13 and an oil storage cavity 112, and the inner cylinder part 2 and the oil separation core 3 are arranged in different regions of the outer cylinder body 11, the volume of the outer cylinder body 11 can be effectively reduced to reduce the processing and manufacturing cost.

[0063] The present application also provides an air compressor unit, including a compressor and the oil separator as described above. The oil separator is connected to the compressor. Since the outer cylinder body 11 divides the internal space into a fine separation cavity 111, a rough separation cavity 13 and an oil storage cavity 112, it is beneficial to the internal structure layout of the air compressor unit and reduces the volume of the air compressor unit.

[0064] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. An oil separator, characterized in that: It comprises an outer cylinder, an inner cylinder and an oil separator core; the outer cylinder comprises an outer cylinder body and an air inlet pipe; the inner cylinder comprises an inner cylinder body, an upper baffle and a lower baffle; the inner cylinder and the oil separator core are both arranged in the outer cylinder body, and the air inlet pipe is tangentially connected to the outer cylinder body; The upper baffle is sleeved on one end of the inner tube body, and the lower baffle is sleeved on one end of the inner tube body away from the upper baffle; the upper baffle and the outer wall of the inner tube body, the lower baffle and the inner wall of the outer tube body form a rough separation chamber, and the air intake pipe is connected to the rough separation chamber.

2. The oil separator according to claim 1, characterized in that: The air inlet pipe is arranged adjacent to the upper baffle and is located below the upper baffle; the outer diameter of the inner cylinder body gradually increases from top to bottom.

3. The oil separator according to claim 2, characterized in that: Along the direction perpendicular to the axis of the inner cylinder body, the angle A between the projection of the outer wall of the inner cylinder body and the axis of the inner cylinder body is not greater than 5 degrees and not less than 2 degrees.

4. The oil separator according to claim 3, characterized in that: The wall thickness of the inner cylinder body is uniformly arranged.

5. The oil separator according to claim 1, characterized in that: The inner cylinder body is provided with a flow hole; the flow hole is adjacent to the lower partition and is located below the air intake pipe; the rough separation chamber is connected with the cavity of the inner cylinder body through the flow hole, and the cavity of the inner cylinder body is connected with the fine separation chamber of the outer cylinder body accommodating the oil separation core.

6. The oil separator according to claim 5, characterized in that: There are multiple flow holes, which are spaced around the circumference of the inner tube body; the outlet end of the air inlet pipe is arranged away from the flow holes; and the total area of ​​the tangential surface of the flow holes is larger than the cross-sectional area of ​​the outlet end of the air inlet pipe.

7. The oil separator according to claim 1, characterized in that: The upper baffle includes a first outer periphery and a first inner periphery; the first outer periphery is fixed to the inner wall of the outer tube body, and the first inner periphery is sleeved on the end of the inner tube body; along the axial direction of the inner tube body, the outer diameter of the upper baffle gradually decreases from the first outer periphery to the first inner periphery.

8. The oil separator according to claim 1, characterized in that: The lower partition includes a second outer periphery and a second inner periphery; the second outer periphery is fixed to the inner wall of the outer tube body, and the second inner periphery is sleeved on the other end of the inner tube body; along the axial direction of the inner tube body, the outer diameter of the upper partition gradually increases from the second inner periphery to the second outer periphery.

9. The oil separator according to claim 8, characterized in that: The lower partition is provided with an oil groove and an air vent; the oil groove is recessed from the second outer periphery to the second inner periphery; the oil groove and the air vent are both arranged at intervals around the circumference of the lower partition; the coarse separation chamber is connected with the oil storage chamber of the outer cylinder body through the oil groove and the air vent.

10. The oil separator according to claim 1, characterized in that: The inner cylinder member further comprises an inner baffle; the inner baffle is located in the cavity of the inner cylinder body and is located at the same end of the inner cylinder body as the lower baffle.

11. The oil separator according to claim 10, characterized in that: The inner diameter of the inner baffle increases from top to bottom; the inner baffle comprises an oil leakage hole, and the oil leakage hole is arranged at the center of the inner baffle.

12. The oil separator according to claim 1, characterized in that The outer cylinder also includes a flow stabilizing plate; the flow stabilizing plate is located below the lower baffle and connected to the inner wall of the outer cylinder body.

13. The oil separator according to claim 1, characterized in that The air intake pipe includes a pipe body, a welding plate and a baffle; the welding plate is sleeved on the pipe body and fixed to the inner wall of the outer tube body; the baffle is inclined from the middle area of ​​the air intake pipe to the outlet end of the air intake pipe, and the cross-section of the air intake pipe gradually decreases from the middle area of ​​the air intake pipe to the outlet end of the air intake pipe.

14. An air compressor unit, characterized in that: The invention comprises a compressor and an oil separator according to any one of claims 1 to 13; the oil separator is connected to the compressor.

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