Efficient variable-frequency two-stage compression screw machine

Abstract

The utility model discloses an efficient variable-frequency two-stage compression screw machine, and belongs to the technical field of air compressors. The screw machine comprises a compressor main machine, a motor and an oil gas barrel, the oil gas barrel comprises a barrel body, two filtering pieces and a supporting mechanism, the supporting mechanism comprises a connecting base and two exhaust pieces, the two exhaust pieces are located on the two sides of the connecting base respectively, and the two exhaust pieces are fixedly connected with the connecting base through connecting rods; wherein one exhaust part is fixedly connected to an outlet of the barrel body through a supporting disc, the two filtering parts are detachably connected to the two exhaust parts respectively, the two exhaust parts are each provided with an air cavity, the air cavities of the two exhaust parts communicate with each other through an air guiding mechanism, the connecting base is sleeved with a closed cylinder, and a driving mechanism is arranged in the barrel body. According to the utility model, the driving mechanism is used for driving the sealing cylinder to move up and down so as to switch the filtering pieces, the blocked filtering piece is sealed, and the unused filtering piece is started, so that the suddenly blocked filtering piece is prevented from influencing the air outlet efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a high-efficiency variable frequency two-stage compression screw machine. Background Art

[0002] Screw compressors are also called screw compressors, which are divided into single screw compressors and twin screw compressors. It is an air compressor that uses the grooves on the spiral rotor to continuously inhale gas from the outside and generate compressed air. When the air is discharged from the main engine of the screw compressor, the air will be mixed with lubricating oil and other substances, so it is also necessary to pass through the oil and gas separation barrel to remove the oil droplets in the air. After the air enters the oil and gas separation barrel, most of the oil droplets will adhere to the barrel wall under the action of centrifugal force, and some fine oil droplets will be filtered through the filter element in the oil and gas separation barrel. The air discharged from the main engine contains not only oil droplets, but also impurities such as iron powder. After a period of use, the filter element will reduce the air output due to the attachment of impurities, which will increase the current of the motor. If this state is maintained for a long time, the life of the compressor will be reduced, and frequent maintenance and inspection of the compressor will cost a lot of manpower, so a new type of screw compressor is needed to solve this problem. Utility Model Content

[0003] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a high-efficiency variable frequency two-stage compression screw machine.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a high-efficiency variable frequency two-stage compression screw machine, including a compressor main unit, a motor and an oil and gas barrel, the oil and gas barrel including a barrel body, two filters and a supporting mechanism for fixing the filters, the supporting mechanism including a connecting seat and two exhaust parts, the two exhaust parts are respectively located on both sides of the connecting seat, the two exhaust parts are fixedly connected to the connecting seat through a connecting rod, one of the exhaust parts is fixedly connected to the outlet of the barrel body through a supporting plate, the two filters are respectively disassembled and connected to the two exhaust parts, the two exhaust parts are provided with air cavities, the air cavities of the two exhaust parts are interconnected through an air guide mechanism, the outer sleeve of the connecting seat is provided with a closing cylinder for closing one of the filters, and the barrel body is provided with a driving mechanism for driving the closing cylinder to move up and down along the outer ring of the connecting seat.

[0006] By adopting the above technical scheme, under the action of the exhaust member and the air guide mechanism, the oil and gas mixture entering the barrel body will first pass through the filter member to remove the oil, and then enter the exhaust member. The gas entering the top exhaust member will be discharged through the air valve on the barrel body, and the air entering the bottom exhaust member will enter the top exhaust member through the air guide channel and then be discharged through the air valve. In this way, the two exhaust members can separate the oil and gas separately, and one of the filters can be temporarily closed by the closing cylinder so that it does not participate in the oil and gas separation temporarily. When the filter in use is blocked by impurities and the exhaust efficiency is reduced, the driving mechanism will drive the closing cylinder to move, so that the closing cylinder leaves the unused filter and moves to the blocked filter to be closed. At this time, the oil and gas will be separated and discharged through the unused filter instead of passing through the blocked filter. In this way, the replacement interval of the filter is improved, and the filter can be avoided from being suddenly blocked due to emergencies, affecting the air outlet efficiency, and affecting the service life of the compressor.

[0007] Preferably, the driving mechanism comprises a threaded ring and a power mechanism for driving the closed cylinder to rotate, the threaded ring is sleeved on the outside of the connecting seat, the connecting seat is fixedly connected to the threaded ring, and the closed cylinder is threadedly connected to the threaded ring. The utility model can drive the closed cylinder to rotate by using the power mechanism, so that the closed cylinder can move up and down under the action of the thread.

[0008] Preferably, the power mechanism includes a servo motor and a transmission mechanism for transmitting power to the closed cylinder, the support plate is fixedly connected to a mounting seat, the servo motor is fixedly connected inside the mounting seat, and the output shaft of the servo motor extends to the outside of the mounting seat. The utility model uses a servo motor to accurately control the number of rotations of the closed cylinder so that the closed cylinder can accurately reach a position capable of sealing the filter element. The servo motor is controlled by a flow sensor on the exhaust pipe. When the flow on the exhaust pipe is lower than a certain value, the servo motor will start to drive the closed cylinder to rotate through the transmission mechanism.

[0009] Preferably, the air guide mechanism includes two rotating rings and a plurality of air pipes, the two rotating rings are provided with an annular groove, the two annular grooves are connected through a plurality of air pipes, the two rotating rings are respectively connected to the two exhaust members in rotation, the two annular grooves are respectively connected to the two air cavities, and the closed cylinder is connected to the air pipes in transmission through a connecting mechanism. The utility model utilizes the transmission connection between the rotating ring and the exhaust member, so that the gas can enter the air cavity of the top exhaust member by sequentially passing through the annular groove of the bottom connecting ring, the air pipe and the annular groove of the top connecting ring, thereby achieving the air guide effect, and at the same time, the air pipe can rotate around the connecting seat, and can drive the closed cylinder to rotate through the connecting mechanism.

[0010] Preferably, the connection mechanism includes a plurality of sleeves, which are respectively sleeved on each of the trachea, and the sleeves are slidably connected to the trachea, and the sleeves are fixedly connected to the closing cylinder. The utility model uses the sleeves fixedly connected to the closing cylinder, so that the closing cylinder can rotate under the drive of the trachea and can also slide along the trachea, thereby achieving transmission while satisfying the degree of freedom required for the movement of the closing cylinder.

[0011] Preferably, the transmission mechanism includes a connecting ring, a plurality of transmission rods and a plurality of connecting tubes, each of the transmission rods is fixedly connected to a connecting tube, each of the connecting tubes is fixedly connected to a trachea, and a plurality of the transmission rods are fixedly connected to the output shaft of the servo motor through the connecting ring. The utility model utilizes the connecting ring to enable the servo motor to simultaneously drive all the transmission rods to rotate around the connecting seat, and the transmission rods are fixed to the trachea through the connecting tube to achieve the driving of the trachea.

[0012] Preferably, a rolling groove is provided inside the sleeve, and a plurality of balls are arranged in the rolling groove. The utility model utilizes the balls to convert the friction between the sleeve and the air pipe into rolling friction, thereby reducing the wear of the air pipe.

[0013] Preferably, both ends of the closed cylinder are fixedly connected with sealing rings, and the connection seat and the two exhaust members are provided with sealing rings at the positions where they abut against the closed cylinder. The utility model utilizes the mutual pressure between the sealing rings and the sealing rings to enhance the sealing performance of the gap between the closed cylinder and the connection seat and the exhaust member.

[0014] Preferably, the connection seat is provided with an installation opening for facilitating installation of the filter element, the installation opening is sealed by a cover, and the exhaust element at the top is threadedly connected with a support ring. The utility model utilizes the cover and the support ring, so that when replacing the filter element at the bottom, it can be replaced by removing the support ring and the cover, without disassembling the entire exhaust element and the connection seat, making replacement more convenient.

[0015] In summary, the beneficial effects of the utility model are:

[0016] 1. The driving mechanism is used to drive the sealing cylinder to move up and down to switch the filter element, close the blocked filter element, and activate the unused filter element, so as to avoid the sudden blockage of the filter element affecting the air outlet efficiency.

[0017] 2. By using the sealing cover and the supporting ring, when replacing the filter element located below, it is possible to replace it by removing the supporting ring and the sealing cover without disassembling the entire exhaust element and the connecting seat, making replacement more convenient.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0019] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0020] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0022] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure;

[0025] Figure 2 It is a schematic diagram of the overall structure inside the barrel;

[0026] Figure 3 It is a schematic diagram of the exhaust component structure;

[0027] Figure 4 It is a schematic diagram of the connecting seat structure;

[0028] Figure 5 Schematic diagram of the ball structure.

[0029] Explanation of main figure marks: 1. compressor main unit; 2. motor; 3. barrel; 4. filter element; 5. connecting seat; 6. exhaust element; 7. connecting rod; 8. support plate; 9. closing cylinder; 10. threaded ring; 11. servo motor; 12. mounting seat; 13. rotating ring; 14. air pipe; 15. air cavity; 16. sleeve; 17. connecting ring; 18. transmission rod; 19. connecting cylinder; 20. ball bearing; 21. sealing ring; 22. sealing ring; 23. cover; 24. support ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0031] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] like Figure 1-4As shown, a high-efficiency variable frequency two-stage compression screw machine includes a compressor host 1, a motor 2 and an oil and gas barrel. The oil and gas barrel includes a barrel body 3, two filters 4 and a supporting mechanism for fixing the filters 4. The supporting mechanism includes a connecting seat 5 and two exhaust members 6. The two exhaust members 6 are respectively located on both sides of the connecting seat 5. The two exhaust members 6 are fixedly connected to the connecting seat 5 through a connecting rod 7. One of the exhaust members 6 is fixedly connected to the outlet of the barrel body 3 through a supporting plate 8. The two filters 4 are respectively detachable and connected to the two exhaust members 6. The two exhaust members 6 are both provided with an air cavity 15. The air cavities 15 of the two exhaust members 6 are interconnected through an air guide mechanism. The outer sleeve of the connecting seat 5 is provided with a closing cylinder 9 for closing one of the filters 4. The barrel body 3 is provided with a driving mechanism for driving the closing cylinder 9 to move up and down along the outer ring of the connecting seat 5.

[0035] By adopting the above technical scheme, under the action of the exhaust member 6 and the air guide mechanism, the oil-gas mixture entering the barrel body 3 will first pass through the filter member 4 to remove the oil, and then enter the exhaust member 6. The gas entering the top exhaust member 6 will be discharged through the air valve on the barrel body 3, and the air entering the bottom exhaust member 6 will enter the top exhaust member 6 through the air guide channel and then be discharged through the air valve. In this way, the two exhaust members 6 can separate oil and gas separately, and one of the filters 4 can be temporarily closed by the closing cylinder 9 so that it does not participate in the oil-gas separation temporarily. When the filter 4 in use is blocked by impurities and the exhaust efficiency is reduced, the driving mechanism will drive the closing cylinder 9 to move, so that the closing cylinder 9 leaves the unused filter 4 and moves to the blocked filter 4 to be closed. At this time, the oil and gas will be separated and discharged through the unused filter 4 without passing through the blocked filter 4. In this way, the replacement interval of the filter 4 is increased, and the filter 4 is prevented from being suddenly blocked due to emergencies, affecting the exhaust efficiency, and affecting the service life of the compressor.

[0036] The driving mechanism includes a threaded ring 10 and a power mechanism for driving the closed cylinder 9 to rotate. The threaded ring 10 is sleeved on the outside of the connecting seat 5, and the connecting seat 5 is fixedly connected to the threaded ring 10, and the closed cylinder 9 is threadedly connected to the threaded ring 10. The power mechanism can drive the closed cylinder 9 to rotate, so that the closed cylinder 9 can move up and down under the action of the thread.

[0037] The power mechanism includes a servo motor 11 and a transmission mechanism for transmitting power to the closed cylinder 9. The support plate 8 is fixedly connected to a mounting seat 12. The servo motor 11 is fixedly connected in the mounting seat 12, and the output shaft of the servo motor 11 extends to the outside of the mounting seat 12. The servo motor 11 is used to accurately control the number of rotations of the closed cylinder 9 so that the closed cylinder 9 can accurately reach a position that can close the filter element 4. The servo motor 11 is controlled by a flow sensor on the exhaust pipe 14. When the flow on the exhaust pipe 14 is lower than a certain value, the servo motor 11 will start to drive the closed cylinder 9 to rotate through the transmission mechanism.

[0038] The air guide mechanism includes two rotating rings 13 and a plurality of air pipes 14. Both rotating rings 13 are provided with annular grooves, which are connected through a plurality of air pipes 14. The two rotating rings 13 are respectively connected to the two exhaust members 6 in rotation, and the two annular grooves are respectively connected to the two air cavities 15. The closed cylinder 9 is connected to the air pipes 14 in a transmission manner through the connecting mechanism. By means of the transmission connection between the rotating rings 13 and the exhaust members 6, the gas can enter the air cavity 15 of the top exhaust member 6 by sequentially passing through the annular groove of the bottom connecting ring 17, the air pipes 14 and the annular groove of the top connecting ring 17, thereby achieving the air guide function. At the same time, the air pipes 14 can also rotate around the connecting seat 5, and can drive the closed cylinder 9 to rotate through the connecting mechanism.

[0039] The connection mechanism includes a plurality of sleeves 16, which are respectively sleeved on each air pipe 14, and the sleeves 16 are slidably connected to the air pipe 14, and the sleeves 16 are fixedly connected to the closing cylinder 9. By the sleeves 16 fixedly connected to the closing cylinder 9, the closing cylinder 9 can rotate under the drive of the air pipe 14, and can also slide along the air pipe 14, so as to realize the transmission while satisfying the degree of freedom required for the movement of the closing cylinder 9.

[0040] The transmission mechanism includes a connecting ring 17, a plurality of transmission rods 18 and a plurality of connecting tubes 19, each transmission rod 18 is fixedly connected to a connecting tube 19, each connecting tube 19 is fixedly connected to an air pipe 14, and a plurality of transmission rods 18 are fixedly connected to the output shaft of the servo motor 11 with the connecting ring 17. The servo motor 11 can simultaneously drive all the transmission rods 18 to rotate around the connecting seat 5 by using the connecting ring 17, and the transmission rods 18 are fixed to the air pipe 14 by the connecting tube 19, so as to drive the air pipe 14.

[0041] The sleeve 16 inner side is provided with a rolling groove, and a plurality of balls 20 are arranged in the rolling groove. The friction between the sleeve 16 and the trachea 14 is converted into rolling friction by the balls 20, so as to reduce the wear and tear of the trachea 14.

[0042] Both ends of the closed cylinder 9 are fixedly connected with sealing rings 21, and the positions where the connecting seat 5 and the two exhaust members 6 abut against the closed cylinder 9 are provided with sealing rings 22. The sealing performance of the gap between the closed cylinder 9 and the connecting seat 5 and the exhaust member 6 is enhanced by the mutual pressure of the sealing rings 21 and the sealing rings 22.

[0043] The connection seat 5 is provided with an installation opening for facilitating installation of the filter element 4, and the installation opening is sealed by a cover 23, and the exhaust element 6 at the top is threadedly connected with a support ring 24. By using the cover 23 and the support ring 24, when replacing the filter element 4 at the bottom, it can be replaced by removing the support ring 24 and the cover 23, without disassembling the entire exhaust element 6 and the connection seat 5, making replacement more convenient.

[0044] It should be noted that many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

Claims

1. A high-efficiency variable frequency two-stage compression screw machine, comprising a compressor main unit (1), a motor (2) and an oil and gas tank, characterized in that: The oil and gas barrel comprises a barrel body (3), two filter elements (4) and a support mechanism for fixing the filter elements (4), the support mechanism comprising a connecting seat (5) and two exhaust elements (6), the two exhaust elements (6) are respectively located on both sides of the connecting seat (5), the two exhaust elements (6) are fixedly connected to the connecting seat (5) through a connecting rod (7), one of the exhaust elements (6) is fixedly connected to the outlet of the barrel body (3) through a support plate (8), the two filter elements (4) are respectively detachably connected to the two exhaust elements (6), the two exhaust elements (6) are each provided with an air cavity (15), the air cavities (15) of the two exhaust elements (6) are interconnected through an air guide mechanism, the outer shell of the connecting seat (5) is provided with a closing cylinder (9) for closing one of the filter elements (4), and the barrel body (3) is provided with a driving mechanism for driving the closing cylinder (9) to move up and down along the outer ring of the connecting seat (5).

2. The high-efficiency variable frequency two-stage compression screw machine according to claim 1 is characterized in that: The driving mechanism comprises a threaded ring (10) and a power mechanism for driving the closed cylinder (9) to rotate; the threaded ring (10) is sleeved on the outside of the connecting seat (5), the connecting seat (5) is fixedly connected to the threaded ring (10), and the closed cylinder (9) is threadedly connected to the threaded ring (10).

3. The high-efficiency variable frequency two-stage compression screw machine according to claim 2 is characterized in that: The power mechanism comprises a servo motor (11) and a transmission mechanism for transmitting power of the servo motor (11) to the sealing cylinder (9); the support plate (8) is fixedly connected to a mounting seat (12); the servo motor (11) is fixedly connected inside the mounting seat (12); and an output shaft of the servo motor (11) extends to the outside of the mounting seat (12).

4. The high-efficiency variable frequency two-stage compression screw machine according to claim 3 is characterized in that: The air guide mechanism comprises two rotating rings (13) and a plurality of air pipes (14); the two rotating rings (13) are each provided with an annular groove; the two annular grooves are connected via the plurality of air pipes (14); the two rotating rings (13) are respectively rotatably connected to the two exhaust members (6); the two annular grooves are respectively connected to the two air cavities (15); and the closed cylinder (9) is transmission-connected to the air pipes (14) via a connecting mechanism.

5. The high-efficiency variable frequency two-stage compression screw machine according to claim 4 is characterized in that: The connection mechanism comprises a plurality of sleeves (16), wherein the plurality of sleeves (16) are respectively sleeved on each of the air pipes (14), and the sleeves (16) are slidably connected to the air pipes (14), and the sleeves (16) are fixedly connected to the sealing cylinder (9).

6. The high-efficiency variable frequency two-stage compression screw machine according to claim 5 is characterized in that: The transmission mechanism comprises a connecting ring (17), a plurality of transmission rods (18) and a plurality of connecting cylinders (19); each of the transmission rods (18) is fixedly connected to a connecting cylinder (19); each of the connecting cylinders (19) is fixedly connected to an air pipe (14); and a plurality of the transmission rods (18) are fixedly connected to the connecting ring (17) and to the output shaft of the servo motor (11).

7. The high-efficiency variable frequency two-stage compression screw machine according to claim 5 is characterized in that: A rolling groove is formed inside the sleeve (16), and a plurality of balls (20) are arranged in the rolling groove.

8. The high-efficiency variable frequency two-stage compression screw machine according to claim 1 is characterized in that: Both ends of the closed cylinder (9) are fixedly connected with sealing rings (21), and the connection seat (5) and the positions where the two exhaust members (6) abut against the closed cylinder (9) are provided with sealing rings (22).

9. The high-efficiency variable frequency two-stage compression screw machine according to claim 1, characterized in that: The connection seat (5) is provided with an installation opening for facilitating installation of the filter element (4), the installation opening being sealed by a sealing cover (23), and the exhaust element (6) located at the top is threadedly connected with a support ring (24).

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