Oil-free air compressor

Abstract

The utility model discloses an oil -free air compressor, including compression cylinder body, drive shaft, drive mechanism and compression mechanism, wherein, a plurality of parallel primary compression cavity are equipped in the compression cylinder body, the compression mechanism includes a plurality of first compression mechanism, a plurality of first compression mechanism with a plurality of primary compression cavity one -to -one corresponds, a plurality of first compression mechanism is used for to a plurality of primary compression cavity in the air compression simultaneously, through setting a plurality of primary compression cavity, has improved the first stage's air -intake capacity and compression processing capacity, can effectively disperse compression load and reduce compression temperature, simultaneously, a plurality of primary compression cavity parallel can effectively promote the stability of the later stage compression to make the oil -free air compressor complete unit's exhaust capacity, energy efficiency, operation stability and system reliability all get the promotion, help to prolong the service life of equipment and reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of air compression technology, specifically to an oil-free air compressor. Background Technology

[0002] An air compressor is a device used to draw in air and compress it to high pressure. It is widely used in industrial production, medical equipment, food processing, and instrumentation.

[0003] In existing technologies, high-pressure air compressors typically employ a single-stage compression structure, meaning air is directly output after only one compression. Due to the high compression ratio and increased temperature, this can easily lead to decreased compression efficiency, increased energy consumption, and shortened component lifespan. Therefore, to improve air compression efficiency and extend component lifespan, some air compressors utilize multi-stage compression.

[0004] However, in existing multistage compressors, there is only one primary compression chamber, which results in significant deficiencies in compression efficiency, structural stability, and system reliability, making it difficult to meet the requirements for high efficiency, large displacement, and long service life. Utility Model Content

[0005] The purpose of this application is to provide an oil-free air compressor to solve the technical problem that the compression efficiency and structural stability of existing air compressors still need to be improved.

[0006] To achieve the above objectives, the technical solution adopted in this application is: to provide an oil-free air compressor, comprising a compression cylinder, a drive shaft, a drive mechanism, and a compression mechanism, wherein, The compression cylinder is provided with multiple parallel primary compression chambers, and each of the multiple primary compression chambers is provided with an air inlet and an exhaust outlet; The compression mechanism includes a plurality of first compression mechanisms, and a plurality of primary compression chambers are circumferentially spaced in the compression cylinder along the drive shaft; each first compression mechanism is slidably connected to a corresponding primary compression chamber; the primary compression chambers are located on both sides of the radial direction of the drive shaft. The first compression mechanism includes a first pull ring, a first bearing, a first connecting rod, a first piston, and a piston pin. The first pull ring is connected to the drive shaft. The first bearing is sleeved on the drive shaft, and its outer wall abuts against the inner wall of the first pull ring. The rotation axis of the first bearing is parallel and spaced apart from the rotation axis of the drive shaft. The first connecting rod is connected to the first pull ring. The first piston is slidably connected in the first-stage compression chamber. The piston pin passes through the first connecting rod radially and is connected to the first piston. The compression cylinder is also provided with a secondary compression chamber and a tertiary compression chamber; The exhaust ports of the multiple primary compression chambers are all connected to the air inlets of the secondary compression chambers, and the exhaust ports of the secondary compression chambers are connected to the air inlets of the tertiary compression chambers. The compression mechanism includes a second compression mechanism, which is slidably connected within the secondary compression chamber and the tertiary compression chamber. The second compression mechanism includes a second pull ring, a second bearing, a second connecting rod, a third connecting rod, a second piston, and a third piston. The second pull ring is connected to the drive shaft. The second bearing is sleeved on the drive shaft, and its outer wall abuts against the inner wall of the second pull ring. The rotation axis of the second bearing is parallel and spaced apart from the rotation axis of the drive shaft. The second connecting rod and the third connecting rod are both connected to the second pull ring. The second piston is slidably connected in the secondary compression chamber, and the second connecting rod abuts against the second piston. The third piston is slidably connected in the tertiary compression chamber, and the third connecting rod abuts against the third piston.

[0007] Optionally, a plurality of the primary compression chambers are arranged circumferentially spaced along the drive shaft in the compression cylinder.

[0008] Optionally, the oil-free air compressor also includes: A counterweight, connected to the drive shaft, is used to adjust the dynamic balance of the drive shaft.

[0009] Optionally, each of the primary compression chambers is equipped with an intake air filter.

[0010] The beneficial effects of the oil-free air compressor provided in this application are as follows: Compared with the prior art, the oil-free air compressor provided in this application includes a compression cylinder, a drive shaft, a drive mechanism, and a compression mechanism. The compression cylinder contains multiple parallel-connected primary compression chambers, each with an inlet and an outlet. The compression mechanism includes multiple first compression mechanisms, each corresponding one-to-one with one of the primary compression chambers. Each first compression mechanism is slidably connected to its corresponding primary compression chamber, and the multiple first compression mechanisms simultaneously compress the air in the multiple primary compression chambers. By setting multiple primary compression chambers, the intake capacity and compression processing capacity of the first stage are improved, effectively distributing the compression load and reducing the compression temperature. Simultaneously, the parallel connection of multiple primary compression chambers effectively improves the stability of subsequent compression stages, thereby enhancing the overall discharge capacity, energy efficiency, operational stability, and system reliability of the oil-free air compressor, helping to extend the equipment's service life and reduce operating costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic diagram of the structure of the oil-free air compressor provided in this application; Figure 2 Schematic diagram of the internal structure of the oil-free air compressor provided in this application Figure 1 ; Figure 3 Schematic diagram of the internal structure of the oil-free air compressor provided in this application Figure 2 ; Figure 4 Schematic diagram of the internal structure of the oil-free air compressor provided in this application Figure 3 ; Figure 5 A schematic diagram of the structure of the first compression mechanism provided in this application; Figure 6 A schematic diagram of the structure of the second compression mechanism provided in this application.

[0013] The following are the labeling elements in the figure: 10. Compression cylinder; 11. Primary compression chamber; 12. Secondary compression chamber; 13. Tertiary compression chamber; 14. Filter; 15. Check valve; 16. Pipeline; 20. Drive shaft; 21. Counterweight; 30. Drive mechanism; 31. Drive motor; 32. Drive pulley; 33. Driven pulley; 34. Drive belt; 40. First compression mechanism; 41. First pull ring; 42. First bearing; 43. First connecting rod; 44. First piston; 45. Piston pin; 46. Guide ring ; 47. Limiting block; 50. Second compression mechanism; 51. Second pull ring; 52. Second bearing; 53. Second connecting rod; 54. Third connecting rod; 55. Second piston; 56. Third piston; 60. First lubrication and sealing mechanism; 61. First self-lubricating cylinder liner; 62. First sealing ring; 70. Second lubrication and sealing mechanism; 71. Second self-lubricating cylinder liner; 711. Positioning boss; 72. Bushing; 73. Second sealing ring; 74. Wear-resistant ring; 80. Base; 90. Machine base. Detailed Implementation

[0014] To make the technical problems, solutions, and beneficial effects of this application clearer, the following detailed description, in conjunction with the accompanying drawings and embodiments, is provided. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0015] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0016] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 describing this application and simplifying the description, 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 on this application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] Please refer to the following: Figures 1 to 6 The oil-free air compressor provided in the embodiments of this application will now be described.

[0019] An oil-free air compressor includes a compression cylinder 10, a drive shaft 20, a drive mechanism 30, and a compression mechanism.

[0020] The drive shaft 20 is rotatably connected to the compression cylinder 10, and the drive mechanism 30 drives the drive shaft 20 to rotate. The compression cylinder 10 has multiple parallel primary compression chambers 11, each with an air inlet and an exhaust port. The compression mechanism includes multiple first compression mechanisms 40, each corresponding one-to-one with a primary compression chamber 11. Each first compression mechanism 40 is slidably connected to its corresponding primary compression chamber 11, and the multiple first compression mechanisms 40 simultaneously compress the air within the multiple primary compression chambers 11.

[0021] Compared with the prior art, the oil-free air compressor provided in this application includes a compression cylinder 10, a drive shaft 20, a drive mechanism 30, and a compression mechanism. The compression cylinder 10 has multiple parallel primary compression chambers 11, each with an air inlet and an exhaust port. The compression mechanism includes multiple first compression mechanisms 40, each corresponding to one of the primary compression chambers 11. Each first compression mechanism 40 is slidably connected to its corresponding primary compression chamber 11, and the multiple first compression mechanisms 40 are used to simultaneously compress the air in the multiple primary compression chambers 11. By setting multiple primary compression chambers 11, the intake capacity and compression processing capacity of the first stage are improved, effectively distributing the compression load and reducing the compression temperature. At the same time, the parallel connection of multiple primary compression chambers 11 can effectively improve the stability of subsequent compression stages, thereby improving the overall discharge capacity, energy efficiency, operational stability, and system reliability of the oil-free air compressor, helping to extend the service life of the equipment and reduce operating costs.

[0022] In this application, filters 14 are provided on the air inlets of multiple primary compression chambers 11 for filtering the intake air.

[0023] In this application, the drive mechanism 30 includes a drive motor 31, a drive pulley 32, a driven pulley 33, and a drive belt 34. The drive pulley 32 is fixedly connected to the motor shaft of the drive motor 31, the driven pulley 33 is mounted on the drive shaft 20, and the drive belt 34 is sleeved on the drive pulley 32 and the driven pulley 33.

[0024] In this application, a plurality of primary compression chambers 11 are arranged circumferentially within the compression cylinder 10 along the drive shaft 20.

[0025] Preferably, in this application, there are two primary compression chambers 11, which are located on opposite sides of the drive shaft 20 in the radial direction.

[0026] In this application, the first compression mechanism 40 includes a first pull ring 41, a first bearing 42, a first connecting rod 43, a first piston 44, and a piston pin 45.

[0027] The first pull ring 41 is connected to the drive shaft 20, and the first bearing 42 is sleeved on the drive shaft 20. The outer wall of the first bearing 42 abuts against the inner wall of the first pull ring 41, and the rotation axis of the first bearing 42 is parallel and spaced apart from the rotation axis of the drive shaft 20, so that the first compression mechanism 40 achieves eccentric movement under the drive of the drive shaft 20, thereby compressing the air in the primary compression chamber 11. The first connecting rod 43 is connected to the outer wall of the first pull ring 41. The first piston 44 is slidably connected in the primary compression chamber 11. The piston pin 45 passes through the first connecting rod 43 radially and is connected to the first piston 44. The first connecting rod 43 drives the first piston 44 to reciprocate in the primary compression chamber 11 through the piston pin 45.

[0028] The compression cylinder 10 also includes a secondary compression chamber 12 and a tertiary compression chamber 13. The exhaust ports of multiple primary compression chambers 11 are connected to the inlets of the secondary compression chambers 12, and the exhaust ports of the secondary compression chambers 12 are connected to the inlets of the tertiary compression chambers 13. A one-way valve 15 is installed in the inlets of the primary compression chambers 11, 12, and 13, and a one-way valve 15 is also installed in the exhaust ports of the primary compression chambers 11, 12, and 13 to prevent air backflow. The primary compression chambers 11, 12, and 13 are connected by a pipe 16.

[0029] The compression mechanism also includes a second compression mechanism 50, which is slidably connected within the secondary compression chamber 12 and the tertiary compression chamber 13.

[0030] When the second compression mechanism 50 compresses the air in the secondary compression chamber 12, the tertiary compression chamber 13 is in an air intake state; when the secondary compression chamber 12 is in an air intake state, the second compression mechanism 50 compresses the air in the tertiary compression chamber 13.

[0031] In this application, it should be noted that when all primary compression chambers 11 are in a compression state, that is, when the multiple first compression mechanisms 40 compress the air in the multiple primary compression chambers 11 into the secondary compression chambers 12, the secondary compression chambers 12 are in an intake state, and the tertiary compression chamber 13 is in a compression state, that is, the second compression mechanism 50 compresses the air in the tertiary compression chamber 13 to the outside of the tertiary compression chamber 13. When all primary compression chambers 11 are in an intake state, the second compression mechanism 50 compresses the air in the secondary compression chambers 12 into the tertiary compression chamber 13, the secondary compression chambers 12 are in a compression state, and the tertiary compression chamber 13 is in an intake state.

[0032] In this application, the second compression mechanism 50 includes a second pull ring 51, a second bearing 52, a second connecting rod 53, a third connecting rod 54, a second piston 55, and a third piston 56.

[0033] The second pull ring 51 is connected to the drive shaft 20. The second bearing 52 is sleeved on the drive shaft 20, with its outer wall abutting against the inner wall of the second pull ring 51, and the rotation axis of the second bearing 52 is parallel and spaced apart from the rotation axis of the drive shaft 20. The second connecting rod 53 and the third connecting rod 54 are both connected to the outer wall of the second pull ring 51. The second piston 55 is slidably connected in the secondary compression chamber 12, and the second connecting rod 53 can abut against the second piston 55. The third piston 56 is slidably connected in the tertiary compression chamber 13, and the third connecting rod 54 can abut against the third piston 56.

[0034] When the secondary compression chamber 12 is in the intake state, the drive shaft 20 drives the second connecting rod 53 to move away from the air inlet of the secondary compression chamber 12 via the second pull ring 51. The second piston 55 moves away from the air inlet of the secondary compression chamber 12 under the action of gas pressure. Simultaneously, the drive shaft 20 drives the third connecting rod 54 via the second pull ring 51 to push the third piston 56 to compress the air in the tertiary compression chamber 13. When the secondary compression chamber 12 is in the compression state, the drive shaft 20 drives the second piston 55 via the second pull ring 51 to compress the air in the secondary compression chamber 12. The drive shaft 20 drives the third connecting rod 54 via the second pull ring 51 to move away from the air inlet of the tertiary compression chamber 13. The third piston 56 moves away from the air inlet of the tertiary compression chamber 13 under the action of gas pressure.

[0035] In this application, the primary compression chamber 11, the secondary compression chamber 12, and the tertiary compression chamber 13 are all equipped with lubrication and sealing mechanisms.

[0036] The lubrication and sealing mechanism is used to lubricate and seal the contact parts between the compression mechanism and the compression chamber. The lubrication and sealing mechanism includes a self-lubricating cylinder liner, which is disposed in the primary compression chamber 11, the secondary compression chamber 12 and the tertiary compression chamber 13.

[0037] Specifically, the lubrication and sealing mechanism includes a first lubrication and sealing mechanism 60 and a second lubrication and sealing mechanism 70. The first lubrication and sealing mechanism 60 is disposed in the primary compression chamber 11, and the second lubrication and sealing mechanism 70 is disposed in the secondary compression chamber 12 and the tertiary compression chamber 13.

[0038] The first lubrication and sealing mechanism 60 includes a first self-lubricating cylinder liner 61 and a first sealing ring 62.

[0039] Each primary compression chamber 11 is equipped with a first self-lubricating cylinder liner 61, which is made of a self-lubricating material, such as polytetrafluoroethylene, to replace the existing technology that uses lubricating oil to lubricate the compression chamber and compression mechanism. A first sealing ring 62 is disposed on the outer wall of the first piston 44, wherein the outer wall of the first piston 44 is provided with a first retaining groove, and the first sealing ring 62 is accommodated in the first retaining groove.

[0040] In this application, a guide ring 46 is provided on the outer wall of the first piston 44, wherein a second groove is provided on the outer wall of the first piston 44, the guide ring 46 is accommodated in the second groove, and the guide ring 46 is disposed on the outside of the piston pin 45.

[0041] The second lubrication and sealing mechanism 70 includes a second self-lubricating cylinder liner 71, a bushing 72, a second sealing ring 73, and a wear-resistant ring 74.

[0042] Both the secondary compression chamber 12 and the tertiary compression chamber 13 are equipped with a second self-lubricating cylinder liner 71. A positioning boss 711 protrudes from the inner wall of the second self-lubricating cylinder liner 71. A bushing 72 is installed on the inner wall of the second self-lubricating cylinder liner 71 and spaced apart from the positioning boss 711. A second sealing ring 73 is located between the positioning boss 711 and the bushing 72. Both the second self-lubricating cylinder liner 71 and the bushing 72 are made of a self-lubricating material, such as polytetrafluoroethylene (PTFE), to replace the existing technology that uses lubricating oil to lubricate the compression chamber and compression mechanism. A third groove is also provided on the inner wall of the second self-lubricating cylinder liner 71, and a wear-resistant ring 74 is accommodated within the third groove.

[0043] In this application, the inner walls of the first pull ring 41 and the second pull ring 51 are provided with limiting blocks 47, and the limiting blocks 47 are provided with slots to fix the first bearing 42 and the second bearing 52 respectively, so as to prevent the first bearing 42 and the second bearing 52 from sliding along the axial direction of the drive shaft 20.

[0044] In this application, the oil-free air compressor also includes a counterweight 21. The counterweight 21 is connected to the drive shaft 20 and is used to adjust the dynamic balance of the drive shaft 20.

[0045] In this application, the oil-free air compressor also includes a base 80 and a frame 90. A drive motor 31 is connected to the base 80. The frame 90 is connected to the base 80, and the compression cylinder 10 is connected to the frame 90, with the compression cylinder 10 set at an angle to the horizontal direction.

[0046] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as defined in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. An oil-free air compressor, comprising a compression cylinder, a drive shaft, a drive mechanism, and a compression mechanism, characterized in that: The compression cylinder is provided with multiple parallel primary compression chambers, and each of the multiple primary compression chambers is provided with an air inlet and an exhaust outlet; The compression mechanism includes a plurality of first compression mechanisms, and a plurality of primary compression chambers are circumferentially spaced in the compression cylinder along the drive shaft; each first compression mechanism is slidably connected to a corresponding primary compression chamber; the primary compression chambers are located on both sides of the radial direction of the drive shaft. The first compression mechanism includes a first pull ring, a first bearing, a first connecting rod, a first piston, and a piston pin. The first pull ring is connected to the drive shaft. The first bearing is sleeved on the drive shaft, and its outer wall abuts against the inner wall of the first pull ring. The rotation axis of the first bearing is parallel and spaced apart from the rotation axis of the drive shaft. The first connecting rod is connected to the first pull ring. The first piston is slidably connected in the first-stage compression chamber. The piston pin passes through the first connecting rod radially and is connected to the first piston. The compression cylinder is also provided with a secondary compression chamber and a tertiary compression chamber; The exhaust ports of the multiple primary compression chambers are all connected to the air inlets of the secondary compression chambers, and the exhaust ports of the secondary compression chambers are connected to the air inlets of the tertiary compression chambers. The compression mechanism includes a second compression mechanism, which is slidably connected within the secondary compression chamber and the tertiary compression chamber. The second compression mechanism includes a second pull ring, a second bearing, a second connecting rod, a third connecting rod, a second piston, and a third piston. The second pull ring is connected to the drive shaft. The second bearing is sleeved on the drive shaft, and its outer wall abuts against the inner wall of the second pull ring. The rotation axis of the second bearing is parallel and spaced apart from the rotation axis of the drive shaft. The second connecting rod and the third connecting rod are both connected to the second pull ring. The second piston is slidably connected in the secondary compression chamber, and the second connecting rod abuts against the second piston. The third piston is slidably connected in the tertiary compression chamber, and the third connecting rod abuts against the third piston.

2. The oil-free air compressor as described in claim 1, characterized in that, Multiple primary compression chambers are circumferentially spaced in the compression cylinder along the drive shaft.

3. The oil-free air compressor as described in claim 1, characterized in that, Also includes: A counterweight, connected to the drive shaft, is used to adjust the dynamic balance of the drive shaft.

4. The oil-free air compressor as described in claim 1, characterized in that, Each of the primary compression chambers is equipped with an intake air filter.

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