Variable-frequency screw air compressor

Abstract

The utility model discloses a variable-frequency screw air compressor, and belongs to the technical field of air compressors. The air compressor comprises an oil gas barrel, the oil gas barrel comprises a barrel body and filters, the number of the filters is two, a mounting frame is arranged in the barrel body, the mounting frame comprises two supporting pieces used for supporting the filters, the two supporting pieces are each provided with a cavity, the two filters are communicated with the two cavities respectively, and the two cavities are communicated. A partition plate is arranged between the two supporting pieces, sealing sleeves are arranged between the partition plate and the two supporting pieces, a driving mechanism used for driving the two sealing sleeves to be unfolded or folded is arranged on one mounting frame, and the states of the two sealing sleeves are opposite.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a variable frequency screw air compressor. Background Technology

[0002] Screw air compressors, also known as screw compressors, are divided into single-screw and twin-screw air compressors. They are air compressors that use grooves on a screw rotor to continuously draw in gas and generate compressed air. When air exits the main unit of the screw air compressor, it contains substances such as lubricating oil. Therefore, it needs to pass through an oil-gas separator to remove oil droplets. After entering the oil-gas separator, most oil droplets adhere to the separator wall under centrifugal force, while smaller droplets are filtered by the filter element inside the separator. The air exiting the main unit contains not only oil droplets but also impurities such as iron powder. After a period of use, the filter element will accumulate impurities, reducing the air output. This increases the motor current, and if this situation continues for a long time, it will shorten the lifespan of the air compressor. Frequent maintenance and inspection of the air compressor requires a lot of manpower. Therefore, a new type of screw air compressor is needed to solve this problem. Utility Model Content

[0003] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the description and other accompanying drawings.

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a variable frequency screw air compressor.

[0005] To achieve the above objectives, the technical solution is: a variable frequency screw air compressor, comprising a base, a main unit, a main motor, an oil-gas separator, and a cooler. The main unit, main motor, oil-gas separator, and cooler are all fixedly connected to the base. The main motor is driven by the main unit via a coupling. The oil-gas separator includes a barrel body and filters. Two filters are provided. A mounting bracket is provided inside the barrel body. The mounting bracket includes two support members for supporting the filters. Both support members have cavities. The two filters are respectively connected to the two cavities. The two cavities are connected. A partition is provided between the two support members. A closed sleeve is provided between the partition and the two support members. One of the mounting brackets is provided with a drive mechanism for driving the two closed sleeves to unfold or fold, and the states of the two closed sleeves are opposite.

[0006] By adopting the above technical solution, the entire filter can be enclosed by a sealing sleeve, preventing one filter from contacting the oil and gas inside the tank. The oil and gas will enter the cavity inside the support component through the other filter and then be discharged through the pipe at the top of the tank. If the support component is located at the bottom, the filtered air will enter the cavity of the top support component after entering the cavity of the bottom support component, and then be discharged through the pipe at the top of the tank. When the filter in use is blocked, the flow sensor and other detection devices will detect this and control the drive mechanism to fold the outer sealing sleeve of the unused filter, while the outer sealing sleeve of the blocked filter will unfold, thus activating the other filter. In this way, the oil and gas tank can be used normally temporarily, avoiding damage to the main unit and main motor.

[0007] Preferably, the two cavities are interconnected by a plurality of connecting pipes, the two supporting members are respectively fixed at both ends of the connecting pipes, and the partition is fixedly connected to the plurality of connecting pipes. The two cavities are interconnected by the plurality of connecting pipes, and the two supporting members and the partition are connected together to form the entire mounting frame.

[0008] Preferably, one end of each of the two closures is fixedly connected to one of the two support members, and the other end of each of the two closures is fixedly connected to a drive ring. The mounting bracket is equipped with a power mechanism for driving the drive ring to move. The power mechanism can drive the drive ring to move up and down, thereby allowing the closure to fold or unfold.

[0009] Preferably, the power mechanism includes a servo motor and a screw. The two ends of the screw are rotatably connected to the two support members, and both drive rings are threadedly connected to the screw. The threads between the two drive rings and the screw have opposite directions of rotation. The servo motor and the screw are mutually driven. The servo motor drives the screw to rotate, thereby driving the drive rings to move via the threads. The opposite directions of the two threads ensure that the two drive rings move in opposite directions.

[0010] Preferably, the servo motor and the screw are interconnected via two gears. One gear is connected to the output shaft of the servo motor, and the other gear is connected to the screw. The servo motor is fixedly connected to the support member. The transmission connection between the servo motor and the screw is achieved using two gears.

[0011] Preferably, the drive ring is slidably connected to each of the connecting pipes. The drive ring is provided with a plurality of sleeves, each sleeve being fitted over the outside of each connecting pipe. A sliding bearing is provided between each sleeve and the connecting pipe. The sleeves allow for the installation of the sliding bearings via an interference fit, thereby reducing the resistance between the connecting pipe and the drive ring.

[0012] Preferably, the top support member is threadedly connected to a support ring, which abuts against the filter. The support ring supports the filter, and the threaded connection allows for disassembly of the support ring, enabling easy removal and replacement of the filter located below.

[0013] Preferably, the partition has a retrieval opening, and the partition is threadedly connected to a cover plate for sealing the retrieval opening. The cover plate allows the retrieval opening to be opened, enabling the filter located below the partition to be removed.

[0014] Preferably, the support member is provided with a separator, which wraps around the outside of the servo motor. The separator separates the motor from the oil and gas inside the cavity, preventing the servo motor from being affected.

[0015] Preferably, the base is equipped with a frequency converter for adjusting the frequency of the main motor. The frequency converter allows for frequency conversion of both the main motor and the fan motor within the cooler.

[0016] In summary, the beneficial effects of are:

[0017] 1. When a filter in use becomes clogged, the flow sensor and other detection devices will control the drive mechanism to fold the outer sealing sleeve of the unused filter, while the outer sealing sleeve of the clogged filter will unfold, thus enabling another filter to be used. In this way, the oil and gas tank can be used normally temporarily, avoiding damage to the main unit and main motor.

[0018] 2. The filter can be easily disassembled using the support ring and cover plate.

[0019] 3. A frequency converter can be used to change the frequency of the main motor and the fan motor in the cooler.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0021] Undoubtedly, such and other objectives will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.

[0022] To make the above and other objects, features and advantages more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the invention and form part of the specification. They are used in conjunction with the embodiments of the invention for explanation and do not constitute a limitation thereof.

[0024] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0025] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure;

[0027] Figure 2 Diagram of the internal structure of the barrel Figure 1 ;

[0028] Figure 3 Diagram of the internal structure of the barrel Figure 2 .

[0029] Key reference numerals in the attached drawings: 1. Base; 2. Main unit; 3. Main motor; 4. Oil and gas tank; 5. Cooler; 6. Tank body; 7. Filter; 8. Support component; 9. Cavity; 10. Partition plate; 11. Sealing sleeve; 12. Connecting pipe; 13. Drive ring; 14. Servo motor; 15. Screw; 16. Gear; 17. Sleeve; 18. Sliding bearing; 19. Support ring; 20. Cover plate; 21. Separator; 22. Frequency converter. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] Furthermore, in the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected through a transitional structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to at least one embodiment or example in which a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] like Figure 1-3 The present invention relates to a variable frequency screw air compressor, comprising a base 1, a main unit 2, a main motor 3, an oil-gas separator 4, and a cooler 5. The main unit 2, the main motor 3, the oil-gas separator 4, and the cooler 5 are all fixedly connected to the base 1. The main motor 3 is connected to the main unit 2 via a coupling. The oil-gas separator 4 includes a barrel body 6 and two filters 7. The barrel body 6 is provided with a mounting bracket, which includes two support members 8 for supporting the filters 7. Each support member 8 has a cavity 9. The two filters 7 are respectively connected to the two cavities 9. The two cavities 9 are connected. A partition 10 is provided between the two support members 8. A sealing sleeve 11 is provided between the partition 10 and the two support members 8. One of the mounting brackets is provided with a drive mechanism for driving the two sealing sleeves 11 to open or close. The two sealing sleeves 11 are in opposite states.

[0035] By adopting the above technical solution, the entire filter 7 can be wrapped by the sealing sleeve 11, so that one of the filters 7 will not come into contact with the oil and gas inside the tank 6. The oil and gas will enter the cavity 9 inside the support member 8 through the other filter 7, and then be discharged through the pipe at the top of the tank 6. If the support member 8 is located at the bottom, the filtered air will enter the cavity 9 of the bottom support member 8 and then enter the cavity 9 of the top support member 8, and then be discharged through the pipe at the top of the tank 6. When the filter 7 in use is blocked, the flow sensor and other detection devices will detect it and control the drive mechanism to fold the outer sealing sleeve 11 of the unused filter 7, and unfold the outer sealing sleeve 11 of the blocked filter 7, thereby activating the other filter 7. In this way, the oil and gas tank 4 can be used normally temporarily, avoiding damage to the main unit 2 and the main motor 3.

[0036] Two cavities 9 are interconnected by several connecting pipes 12. Two support members 8 are fixed at both ends of the connecting pipes 12, and a partition plate 10 is fixedly connected to the several connecting pipes 12. The two cavities 9 can be interconnected by the two connecting pipes 12, and the two support members 8 and the partition plate 10 can be connected together to form the entire mounting frame.

[0037] One end of each of the two closed sleeves 11 is fixedly connected to one of the two support members 8, and the other end of each of the two closed sleeves 11 is fixedly connected to a drive ring 13. The mounting bracket is equipped with a power mechanism for driving the drive ring 13 to move. The power mechanism can drive the drive ring 13 to move up and down, thereby enabling the closed sleeves 11 to fold or unfold.

[0038] The power mechanism includes a servo motor 14 and a screw 15. Both ends of the screw 15 are rotatably connected to two support members 8. Two drive rings 13 are threadedly connected to the screw 15, and the threads between the two drive rings 13 and the screw 15 have opposite directions of rotation. The servo motor 14 and the screw 15 are interconnected for power transmission. The servo motor 14 drives the screw 15 to rotate, thereby driving the drive rings 13 to move via the threads. The opposite directions of the two threads ensure that the two drive rings 13 move in opposite directions.

[0039] The servo motor 14 and the screw 15 are interconnected via two gears 16. One gear 16 is connected to the output shaft of the servo motor 14, and the other gear 16 is connected to the screw 15. The servo motor 14 is fixedly connected to the support member 8. The transmission connection between the servo motor 14 and the screw 15 is achieved using two gears 16.

[0040] The drive ring 13 is slidably connected to each connecting pipe 12. The drive ring 13 is provided with several sleeves 17, each sleeve 17 being fitted over the outside of each connecting pipe 12. A sliding bearing 18 is provided between each sleeve 17 and the connecting pipe 12. The sliding bearing 18 can be installed using an interference fit with the sleeves 17, thereby reducing the resistance between the connecting pipe 12 and the drive ring 13.

[0041] The top support member 8 is threadedly connected to a support ring 19, which abuts against the filter 7. The support ring 19 supports the filter 7, and the threaded connection allows the support ring 19 to be disassembled, making it easy to remove and replace the filter 7 located below.

[0042] The partition 10 has an opening for retrieving items, and a cover 20 for sealing the opening is threaded onto the partition 10. The opening can be opened using the cover 20 to remove the filter 7 located below the partition 10.

[0043] A separator 21 is provided on the support member 8, which wraps around the outside of the servo motor 14. The separator 21 can separate the motor from the oil and gas in the cavity 9, thus preventing the servo motor 14 from being affected.

[0044] A frequency converter 22 for adjusting the frequency of the main motor 3 is installed on the base 1. The frequency converter 22 can be used to change the frequency of the main motor 3 and the fan motor in the cooler 5.

[0045] In summary, the working principle of this utility model is as follows: the sealing sleeve 11 can enclose the entire filter 7, so that one of the filters 7 will not come into contact with the oil and gas inside the barrel 6. The oil and gas will enter the cavity 9 inside the support member 8 through the other filter 7, and then be discharged through the pipe at the top of the barrel 6. If the support member 8 is located at the bottom, the filtered air will enter the cavity 9 of the bottom support member 8 and then enter the cavity 9 of the top support member 8, and then be discharged through the pipe at the top of the barrel 6. When the filter 7 in use is blocked, the flow sensor and other detection devices will detect it and control the drive mechanism to fold the outer sealing sleeve 11 of the unused filter 7, and unfold the outer sealing sleeve 11 of the blocked filter 7, thereby activating the other filter 7. In this way, the oil and gas barrel 4 can be used normally temporarily, avoiding damage to the main unit 2 and the main motor 3.

[0046] It should be noted that many specific details have been set forth in the description above for the purpose of full understanding. However, other methods different from those described herein may also be used to implement this, and therefore the scope of protection is not limited to the specific embodiments disclosed below.

Claims

1. A variable frequency screw air compressor, comprising a base (1), a main machine (2), a main motor (3), an oil gas barrel (4) and a cooler (5), the main machine (2), the main motor (3), the oil gas barrel (4) and the cooler (5) are fixedly connected on the base (1), the main motor (3) is in transmission connection with the main machine (2) through a shaft coupling, characterized in that: The oil and gas barrel (4) comprises a barrel body (6) and filters (7), two of which are arranged, a mounting frame is arranged in the barrel body (6), the mounting frame comprises two supporting pieces (8) for supporting the filters (7), two cavities (9) are formed in the two supporting pieces (8), the two filters (7) are communicated with the two cavities (9) respectively, the two cavities (9) are communicated with each other, a partition plate (10) is arranged between the two supporting pieces (8), a closing sleeve (11) is arranged between the partition plate (10) and the two supporting pieces (8), one of the mounting frames is provided with a driving mechanism for driving the two closing sleeves (11) to expand or fold, and the states of the two closing sleeves (11) are opposite. ​ 2. The variable frequency screw air compressor of claim 1, wherein: The two cavities (9) are communicated with each other through a plurality of connecting pipes (12), the two supporting pieces (8) are fixed at two ends of the connecting pipes (12) respectively, and the partition plate (10) is fixedly connected with the plurality of connecting pipes (12).

3. The variable frequency screw air compressor of claim 2, wherein: One end of each of the two closing sleeves (11) is fixedly connected with a supporting piece (8), and the other end of each of the two closing sleeves (11) is fixedly connected with a driving ring (13), and the mounting frame is provided with a power mechanism for driving the driving ring (13) to move.

4. The variable frequency screw air compressor of claim 3, wherein: The power mechanism comprises a servo motor (14) and a screw rod (15), two ends of the screw rod (15) are rotatably connected with the two supporting pieces (8) respectively, the two driving rings (13) are threadedly connected with the screw rod (15), the thread directions between the two driving rings (13) and the screw rod (15) are opposite, and the servo motor (14) and the screw rod (15) are transmissionally connected with each other.

5. The variable frequency screw air compressor of claim 4, wherein: The servo motor (14) and the screw rod (15) are transmissionally connected with each other through two gears (16), one of the gears (16) is transmissionally connected with an output shaft of the servo motor (14), the other gear (16) is transmissionally connected with the screw rod (15), and the servo motor (14) is fixedly connected with the supporting piece (8).

6. The variable frequency screw air compressor of claim 3, wherein: The driving ring (13) is slidably connected with each connecting pipe (12), a plurality of sleeves (17) are arranged on the driving ring (13), each sleeve (17) is sleeved outside each connecting pipe (12), and a sliding bearing (18) is arranged between each sleeve (17) and the connecting pipe (12).

7. The variable frequency screw air compressor of claim 6, wherein: The supporting piece (8) at the top is threadedly connected with a supporting ring (19), and the supporting ring (19) abuts against the filter (7).

8. The variable frequency screw air compressor of claim 1, wherein: A taking opening is formed in the partition plate (10), and a cover plate (20) for plugging the taking opening is threadedly connected with the partition plate (10).

9. The variable frequency screw air compressor of claim 4, wherein: A partition piece (21) is arranged on the supporting piece (8), and the partition piece (21) is wrapped outside the servo motor (14).

10. The variable frequency screw air compressor of claim 4, wherein: A frequency converter (22) for adjusting the frequency of the main motor (3) is arranged on the base (1).

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