Oil mist recovery device for an oil-injected screw vacuum pump

Abstract

The utility model relates to a vacuum pump technical field provides an oil mist recovery device of oil injection screw rod vacuum pump, include: vacuum pump body still include: adaptive component sets up in the outside of vacuum pump body, adaptive component includes: air outlet pipe sets up one end of vacuum pump body, wherein, the inner wall of air outlet pipe is provided with a plurality of mounting brackets, rotation axis sets up in the inner wall of one mounting bracket, wherein, the one end of rotation axis is provided with a plurality of installation buckets, a plurality of sealing rings are arranged on the outer surface of a plurality of installation buckets respectively, wherein, the inner ring of a plurality of sealing rings is provided with adjusting frame, a plurality of fan blade, in the utility model, avoid airflow flow rate too low to cause separation failure, be favorable to utilize the centrifugal force of exhaust gas flow self -driven fan blade angle adaptive adjustment, avoid manual shutdown adjustment, or add motor, sensor etc. Electrical control element, improve work efficiency, reduce cost, avoid oil gas corrosion failure.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to an oil mist recovery device for an oil-injected screw vacuum pump. Background Technology

[0002] Oil-injected screw vacuum pumps are positive displacement vacuum pumps based on a twin-screw meshing rotor structure. They achieve high-efficiency pumping by injecting specific lubricating oil into the pump chamber. They are widely used in industrial applications requiring medium to high vacuum environments. The oil mist recovery device of the oil-injected screw vacuum pump is a core component specifically designed to separate the "oil mist-gas mixture" in the vacuum pump exhaust, recover the lubricating oil, and purify the exhaust.

[0003] In the prior art, such as Chinese Patent No. CN201920575191.2, this utility model relates to an oil mist recovery device for an oil-injected screw vacuum pump, including a housing, an oil mist filter element, an oil collector, a base, and a cover plate. The base is a hollow tubular structure with an oil collection groove fixedly installed on the upper part of the base. The housing has openings at both the upper and lower ends, through which the oil mist filter element penetrates. The lower end of the oil mist filter element is connected to the upper end of the base, and the oil collection groove is connected to the oil collector. A return oil pipe is connected to the lower part of the side wall of the oil collector, and a manual ball valve is installed on the return oil pipe. The cover plate is fixed to the upper end of the oil mist filter element. This utility model, through the oil collection groove and oil collector at the lower end of the oil mist filter element, can collect the oil in the oily exhaust gas after it has been treated by the oil mist filter element, allowing the recovered oil to be reintroduced into the vacuum pump system for reuse. This utility model has a reasonable structure, is easy to disassemble and assemble, can reduce the operating cost of the vacuum pump system, and is environmentally friendly and economical.

[0004] While the above solutions have the advantages mentioned above, they also have disadvantages. The primary separation chamber of traditional oil mist recovery devices uses fixed-angle guide vanes. When the angle of the guide vanes needs to be adjusted, it relies on manual shutdown for adjustment or the addition of electrical control components such as motors and sensors, resulting in low efficiency, high cost, and susceptibility to oil and gas corrosion failures. In addition, the secondary filter element of traditional oil mist recovery devices has a fixed structure. After oil mist particles accumulate on the surface of the filter element, they are prone to agglomeration and blockage of pores, resulting in decreased filtration efficiency, increased exhaust resistance, and high maintenance costs. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the existing technology where the primary separation chamber of the traditional oil mist recovery device uses a fixed-angle guide vane. When the angle of the guide vane needs to be adjusted, it relies on manual shutdown for adjustment or the addition of electrical control components such as motors and sensors, resulting in low efficiency, high cost, and susceptibility to oil and gas corrosion failure. In addition, the secondary filter element of the traditional oil mist recovery device has a fixed structure, and oil mist particles easily agglomerate and clog the pores after accumulating on the surface of the filter element, resulting in decreased filtration efficiency, increased exhaust resistance, and high maintenance costs.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an oil mist recovery device for an oil-injected screw vacuum pump, comprising: a vacuum pump body, and further comprising:

[0007] An adaptive component, disposed outside the vacuum pump body, the adaptive component comprising:

[0008] An exhaust pipe is located at one end of the vacuum pump body, and multiple mounting brackets are provided on the inner wall of the exhaust pipe.

[0009] A rotating shaft is disposed on the inner wall of one of the mounting brackets, wherein a plurality of mounting barrels are disposed at one end of the rotating shaft;

[0010] Multiple sealing rings are respectively disposed on the outer surface of multiple mounting barrels, wherein the inner ring of each sealing ring is provided with an adjustment bracket;

[0011] Multiple fan blades are respectively disposed at one end of multiple adjustment frames, and each adjustment frame is provided with an arc spring on its outer surface;

[0012] A vibration assembly is disposed on the inner wall of the air outlet pipe.

[0013] Preferably, the adaptive component includes:

[0014] Multiple fixing blocks are respectively disposed on the outer surface of multiple arc-shaped springs, wherein the outer surface of the multiple fixing blocks is respectively disposed on the inner wall of multiple mounting barrels;

[0015] Multiple annular rods are respectively disposed on the inner walls of multiple fixed blocks, wherein the outer surfaces of the multiple annular rods are respectively located on the inner rings of multiple arc-shaped springs.

[0016] The technical effect of adopting the above-mentioned further solution is that the ring rod is fixed to the inner wall of the fixing block, and the fixing block is fixed to the inner wall of the mounting barrel, which facilitates the enhancement of the stability of the ring rod and enhances the stability of the arc spring during deformation.

[0017] Preferably, the vibration assembly includes:

[0018] A filter element is disposed on the inner wall at the top of the air outlet pipe, wherein a retaining ring is provided on the outer surface of the filter element.

[0019] The technical advantage of adopting the above-mentioned further solution is that the outer surface of the filter element is movably fitted onto the inner wall of the air outlet pipe, which makes it easier to reduce the gap between the two.

[0020] Preferably, the vibration assembly further includes:

[0021] The oil return pipe is located on the outer surface of the air outlet pipe, with the other end of the oil return pipe located at one end of the vacuum pump body.

[0022] The technical effect of adopting the above-mentioned further solution is that one end of the oil return pipe is fixedly installed on the outer surface of the vent pipe and communicates with the vent pipe, which facilitates the guidance of liquid on the inner wall of the vent pipe.

[0023] Preferably, the vibration assembly further includes:

[0024] An eccentric wheel is disposed on the outer surface of the rotating shaft, wherein a lifting frame is disposed on the outer surface of the eccentric wheel.

[0025] The technical effect of adopting the above-mentioned further solution is that the eccentric wheel and the lifting frame are slidably connected, which makes it easier to drive the lifting frame to move together when the eccentric wheel rotates, thereby enhancing the stability when the two are linked.

[0026] Preferably, the vibration assembly further includes:

[0027] A buffer pad is provided on the outer surface of the lifting frame, wherein the outer surface of the buffer pad is provided with a ring frame.

[0028] The technical effect of adopting the above-mentioned further solution is that the buffer pad is fixedly connected to the lifting frame, which facilitates the enhancement of the stability between the two and reduces the impact on the ring frame by using the buffer pad.

[0029] Preferably, the vibration assembly further includes:

[0030] Multiple elastic elements are disposed on the outer surface of the ring frame, wherein the other end of the multiple elastic elements is disposed on the outer surface of the mounting frame.

[0031] The technical effect of adopting the above-mentioned further solution is that the two ends of the elastic element are fixed to the outer surface of the ring frame and the outer surface of the mounting frame, respectively, which facilitates the enhancement of the stability of the elastic element.

[0032] Preferably, the vibration assembly further includes:

[0033] Multiple anti-detachment rods are provided on the outer surface of the ring frame, wherein the other end of the multiple anti-detachment rods is provided on the inner wall of the mounting frame.

[0034] The technical effect of adopting the above-mentioned further solution is that the anti-detachment rod consists of a long rod and a circular plate. The diameter of the circular plate is larger than the diameter of the long rod. One end of the long rod is fixed to the outer surface of the ring frame, and the outer surface of the other end of the long rod is slidably installed on the inner wall of the mounting frame, which facilitates the enhancement of the stability of the connection between the ring frame and the mounting frame.

[0035] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0036] 1. In this utility model, the separation failure caused by excessively low airflow velocity is avoided. It is beneficial to use the centrifugal force of the exhaust airflow itself to drive the fan blade angle to adjust adaptively, avoiding manual shutdown for adjustment or the addition of motors, sensors and other electronic control components, thereby improving work efficiency, reducing costs and avoiding oil and gas corrosion failures.

[0037] 2. In this utility model, the reciprocating motion of the ring frame touches the filter element, causing the filter element to vibrate slightly. This helps to shake the liquid at the bottom of the filter element to the connection between the oil return pipe and the air outlet pipe. The amplitude of the micro-vibration of the filter element is controllable and is fixed by the eccentricity of the eccentric wheel, so as not to damage the filter element, improve the oil return efficiency, reduce the filter element clogging rate, extend the replacement cycle, and reduce the maintenance cost of enterprises. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of an oil mist recovery device for an oil-injected screw vacuum pump proposed in this utility model;

[0039] Figure 2 This is a partial cross-sectional view of the oil mist recovery device for an oil-injected screw vacuum pump proposed in this utility model.

[0040] Figure 3 This is a bottom view of the oil mist recovery device for an oil-injected screw vacuum pump proposed in this utility model.

[0041] Figure 4 This utility model proposes an oil mist recovery device for an oil-injected screw vacuum pump. Figure 2 Enlarged structural diagram at point A in the middle.

[0042] Legend:

[0043] 1. Vacuum pump body; 2. Oil return pipe; 3. Air outlet pipe; 4. Ring rod; 5. Filter element; 6. Fixing ring; 7. Mounting bracket; 8. Rotating shaft; 801. Eccentric wheel; 802. Lifting frame; 803. Buffer pad; 804. Ring frame; 805. Elastic element; 806. Anti-detachment rod; 807. Mounting barrel; 808. Sealing ring; 809. Arc spring; 810. Fixing block; 9. Adjusting bracket; 10. Fan blade. Detailed Implementation

[0044] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0046] Example 1, as Figure 1-4 As shown, this utility model provides an oil mist recovery device for an oil-injected screw vacuum pump, including: a vacuum pump body 1, and further including:

[0047] An adaptive component, disposed outside the vacuum pump body 1, includes:

[0048] The exhaust pipe 3 is located at one end of the vacuum pump body 1, and the inner wall of the exhaust pipe 3 is provided with multiple mounting brackets 7.

[0049] A rotating shaft 8 is disposed on the inner wall of one of the mounting brackets 7, wherein a plurality of mounting barrels 807 are disposed at one end of the rotating shaft 8;

[0050] Multiple sealing rings 808 are respectively set on the outer surface of multiple mounting barrels 807, wherein the inner ring of each of the multiple sealing rings 808 is provided with an adjustment bracket 9;

[0051] Multiple fan blades 10 are respectively set at one end of multiple adjustment frames 9, and each adjustment frame 9 has an arc spring 809 on its outer surface;

[0052] The vibration component is installed on the inner wall of the air outlet pipe 3.

[0053] Adaptive components include:

[0054] Multiple fixing blocks 810 are respectively disposed on the outer surface of multiple arc springs 809, wherein the outer surfaces of the multiple fixing blocks 810 are respectively disposed on the inner wall of multiple mounting barrels 807;

[0055] Multiple annular rods 4 are respectively set on the inner walls of multiple fixed blocks 810, wherein the outer surfaces of the multiple annular rods 4 are respectively located on the inner rings of multiple arc springs 809.

[0056] In this embodiment, an air inlet pipe is provided on the top of the vacuum pump body 1, and one end of the rotating shaft 8 is rotatably installed on the inner wall of the air outlet pipe 3 to enhance the stability of the rotating shaft 8. The sealing ring 808 is provided on the outer surface of the mounting barrel 807, and the inner wall of the sealing ring 808 is movably sleeved on the outer surface of the adjusting frame 9 to reduce the gap between the two.

[0057] Example 2, as Figure 1-4 As shown, the vibration assembly includes:

[0058] The filter element 5 is located on the inner wall of the top of the air outlet pipe 3, and a fixing ring 6 is provided on the outer surface of the filter element 5.

[0059] The vibration assembly also includes:

[0060] The oil return pipe 2 is located on the outer surface of the air outlet pipe 3, and the other end of the oil return pipe 2 is located at one end of the vacuum pump body 1.

[0061] The vibration assembly also includes:

[0062] An eccentric wheel 801 is disposed on the outer surface of the rotating shaft 8, wherein a lifting frame 802 is disposed on the outer surface of the eccentric wheel 801.

[0063] The vibration assembly also includes:

[0064] A buffer pad 803 is provided on the outer surface of the lifting frame 802, wherein a ring frame 804 is provided on the outer surface of the buffer pad 803.

[0065] The vibration assembly also includes:

[0066] Multiple elastic elements 805 are disposed on the outer surface of the ring frame 804, wherein the other end of the multiple elastic elements 805 is disposed on the outer surface of the mounting frame 7.

[0067] The vibration assembly also includes:

[0068] Multiple anti-detachment rods 806 are set on the outer surface of the ring frame 804, wherein the other end of the multiple anti-detachment rods 806 is set on the inner wall of the mounting frame 7.

[0069] In this embodiment, the outer surface of the filter element 5 is movably fitted onto the inner wall of the air outlet pipe 3, which helps to reduce the gap between the two. The eccentric wheel 801 is slidably connected to the lifting frame 802, which helps to drive the lifting frame 802 to move together when the eccentric wheel 801 rotates, thus enhancing the stability when the two are linked. The buffer pad 803 is fixedly connected to the lifting frame 802, which helps to enhance the stability between the two. The buffer pad 803 is used to reduce the impact on the ring frame 804. The two ends of the elastic element 805 are respectively fixed to the outer surface of the ring frame 804 and the outer surface of the mounting frame 7, which helps to enhance the stability of the elastic element 805. The anti-detachment rod 806 consists of a long rod and a circular plate. The diameter of the circular plate is larger than the diameter of the long rod. One end of the long rod is fixed to the outer surface of the ring frame 804, and the outer surface of the other end of the long rod is slidably installed on the inner wall of the mounting frame 7, which helps to enhance the stability of the connection between the ring frame 804 and the mounting frame 7.

[0070] Working Principle: When the external power supply is connected, the airflow discharged from the vacuum pump body 1 through the outlet pipe 3 drives the fan blades 10, the adjusting frame 9, the arc spring 809, the ring rod 4, the fixing block 810, the mounting barrel 807, and the sealing ring 808 to rotate as the airflow passes through multiple fan blades 10. This working principle is basic and will not be elaborated further. When the exhaust volume of the vacuum pump body 1 increases, such as with a heavier load, the airflow impacts the fan blades 10, causing the adjusting frame 9 to rotate. The adjusting frame 9, due to centrifugal force, overcomes the preload of the arc spring 809 and is thrown outward, causing the fan blades 10 to deflect to a large angle (15°-25°). This enhances the centrifugal force of the rotating airflow, improving the efficiency of oil mist separation. When the exhaust volume decreases, such as during start-up and shutdown, the centrifugal force weakens, and the arc spring 809 resets, causing the fan blades 10 to rotate back to a small angle (5°-15°). This prevents separation failure due to excessively low airflow velocity. This allows the centrifugal force of the exhaust airflow to drive the fan blades 10 to adaptively adjust their angle, avoiding manual adjustment during shutdown or the addition of motors, sensors, or other electronic control components, thus improving efficiency. To improve work efficiency, reduce costs, and prevent oil and gas corrosion malfunctions, during use, the rotation of the installation bucket 807 drives the rotating shaft 8 and the eccentric wheel 801 to rotate. The rotation of the eccentric wheel 801 causes the lifting frame 802 to move vertically along the inner wall of the installation frame 7. As the lifting frame 802 moves, it causes the buffer pad 803, the ring frame 804, and the anti-detachment rod 806 to move. The movement of the ring frame 804 causes the elastic element 805 to deform. Because the filter element 5 is threadedly installed on the inner ring of the fixing ring 6, the fixing ring... The outer surface of the filter element 6 is threaded onto the inner wall of the outlet pipe 3, which facilitates the fixing of the filter element 5 onto the inner wall of the outlet pipe 3. The reciprocating motion of the ring frame 804 touches the filter element 5, causing the filter element 5 to vibrate slightly. This helps to shake the liquid at the bottom of the filter element 5 to the connection between the return oil pipe 2 and the outlet pipe 3. The amplitude of the vibration of the filter element 5 is controllable and is fixed by the eccentricity of the eccentric wheel 801, which will not damage the filter element 5, improve the return oil efficiency, reduce the filter element clogging rate, extend the replacement cycle, and reduce the maintenance cost of the enterprise.

[0071] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An oil mist recovery device for an oil-injected screw vacuum pump, comprising: The vacuum pump body (1) is characterized in that it further includes: An adaptive component, disposed outside the vacuum pump body (1), the adaptive component comprising: An exhaust pipe (3) is provided at one end of the vacuum pump body (1), wherein multiple mounting brackets (7) are provided on the inner wall of the exhaust pipe (3). A rotating shaft (8) is disposed on the inner wall of one of the mounting brackets (7), wherein a plurality of mounting barrels (807) are disposed at one end of the rotating shaft (8). Multiple sealing rings (808) are respectively disposed on the outer surface of multiple mounting barrels (807), wherein the inner ring of each of the multiple sealing rings (808) is provided with an adjustment bracket (9). Multiple fan blades (10) are respectively disposed at one end of multiple adjustment frames (9), and each adjustment frame (9) is provided with an arc spring (809) on its outer surface. The vibration assembly is disposed on the inner wall of the air outlet pipe (3).

2. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 1, characterized in that: The adaptive component includes: Multiple fixing blocks (810) are respectively disposed on the outer surface of multiple arc springs (809), wherein the outer surface of multiple fixing blocks (810) is respectively disposed on the inner wall of multiple mounting barrels (807); Multiple annular rods (4) are respectively disposed on the inner walls of multiple fixed blocks (810), wherein the outer surfaces of the multiple annular rods (4) are respectively located on the inner rings of multiple arc springs (809).

3. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 2, characterized in that: The vibration assembly includes: A filter element (5) is disposed on the inner wall at the top of the air outlet pipe (3), wherein a retaining ring (6) is disposed on the outer surface of the filter element (5).

4. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 3, characterized in that: The vibration assembly also includes: The oil return pipe (2) is located on the outer surface of the air outlet pipe (3), wherein the other end of the oil return pipe (2) is located at one end of the vacuum pump body (1).

5. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 4, characterized in that: The vibration assembly also includes: An eccentric wheel (801) is disposed on the outer surface of the rotating shaft (8), wherein a lifting frame (802) is disposed on the outer surface of the eccentric wheel (801).

6. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 5, characterized in that: The vibration assembly also includes: A buffer pad (803) is provided on the outer surface of the lifting frame (802), wherein an annular frame (804) is provided on the outer surface of the buffer pad (803).

7. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 6, characterized in that: The vibration assembly also includes: Multiple elastic elements (805) are disposed on the outer surface of the ring frame (804), wherein the other end of the multiple elastic elements (805) is disposed on the outer surface of the mounting frame (7).

8. The oil mist recovery device for an oil-injected screw vacuum pump according to claim 7, characterized in that: The vibration assembly also includes: Multiple anti-detachment rods (806) are provided on the outer surface of the ring frame (804), wherein the other end of the multiple anti-detachment rods (806) is provided on the inner wall of the mounting frame (7).

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