Low-noise variable-frequency air compressor

Abstract

The invention relates to the technical field of air compressors, in particular to a low-noise variable-frequency air compressor which is characterized in that a pressurizing tank is fixedly arranged on an air storage tank, a machine shell is fixedly arranged on the pressurizing tank, an air compressing mechanism is arranged in the machine shell and matched with the pressurizing tank, and a driving motor is fixedly arranged on the machine shell; the driving motor and the air compressing mechanism are in transmission arrangement through a driving mechanism; by designing a variable-stroke transmission structure and matching with a large-section air compression structure, low-frequency output is realized to keep pressing in sufficient air, so that high-frequency movement of the equipment is effectively reduced to realize shock absorption and noise reduction of the equipment, and meanwhile, different groups of air compression structures with different amplitude strokes are designed to realize the purpose of changing the access mode to realize the purpose of reducing the noise of the equipment. Different working access modes are selected according to power requirements of the equipment, and stable operation of the equipment is kept.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, and more specifically to a low-noise variable frequency air compressor. Background Technology

[0002] An air compressor uses a high-speed motor to drive its internal air compression components, providing high-pressure gas and storing it for later use. Existing air compressors, with the addition of sensors, electronic control designs, and advanced variable frequency motor technology, increase equipment power when using a large amount of air. When using a small amount of air and the pre-stored air pressure reaches the value, the motor operating frequency is reduced to maintain idling. However, because the equipment's air compression structure is a follow-up motor output shaft structure, the high-frequency operation results in significant noise. Furthermore, when some motors operate at low frequency and low power, the output power is mismatched with the working power of the air compression components, leading to inefficient operation of the air compressor. Therefore, an improved design is proposed for the air compressor to address these issues. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a low-noise variable frequency air compressor. This compressor achieves low-frequency output by designing a variable stroke transmission structure in conjunction with a large-section air compression structure, thereby maintaining sufficient compressed air and effectively reducing high-frequency motion of the equipment to achieve vibration reduction and noise reduction. At the same time, it designs air compression structures with different amplitude strokes in different groups, allowing for the selection of different working access modes according to the power requirements of the equipment by changing the access method, thus maintaining stable operation of the equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions: It comprises a gas storage tank, a pressurization tank, and a casing, wherein the pressurization tank is fixedly mounted on the gas storage tank, and the casing is fixedly mounted on the pressurization tank. It also includes: The air compressor is housed inside the casing and is configured in conjunction with the pressurization tank. A drive motor, which is fixedly mounted on the housing; The drive mechanism connects the drive motor and the air compressor via a transmission system.

[0005] Preferably, there are two pressurizing tanks arranged in parallel, and the outlet end of the pressurizing tank is connected to the inlet end of the gas storage tank through a solenoid valve unit. A compressed air piston is movably installed inside the pressurizing tank.

[0006] Preferably, the air compressor comprises: Two air compressors are fixedly mounted on two pressurizing tanks, and the air compressors are located inside the machine casing. The transmission pistons are arranged in pairs within the two ports of a compressor cylinder. The transmission rod is fixedly mounted on the transmission piston and extends out of the air compressor.

[0007] Preferably, the air compressor is a two-section cylinder structure with different inner diameters integrally formed. The two transmission pistons in one air compressor are respectively set in the two sections of the air compressor. One end of the larger inner diameter of one air compressor is fixed to a pressure tank, and the other end of the smaller inner diameter of the other air compressor is fixed to another pressure tank. The transmission rod of the air compressor fixed in one port of the pressure tank passes through the end plate of the pressure tank and is fixed to the air compressor piston.

[0008] Preferably, the drive mechanism comprises: A dual-shaft reducer, wherein the dual-shaft reducer is fixedly installed inside a housing; A coupling is used to connect the output shaft of the drive motor to the input shaft of the dual-shaft reducer. Crankshafts, wherein there are two crankshafts and they are respectively fixedly mounted on the two output shafts of the dual-shaft reducer; The connecting rod is screwed onto the crankshaft via a pivot.

[0009] Preferably, the two crankshafts on the dual-shaft reducer are arranged in opposite directions at 180°.

[0010] Preferably, a connecting seat is fixedly provided on the transmission rod facing one end of the crankshaft of the air compressor, and a transmission seat is spun on the end of the connecting rod away from the crankshaft via a rotating shaft, and the transmission seat and the connecting seat are configured to cooperate.

[0011] Preferably, a guide rail is fixedly provided on the inner wall of the housing, the connecting seat is slidably mounted on the guide rail, and the transmission seat is slidably mounted on the guide rail.

[0012] Preferably, a servo motor is fixedly mounted on the transmission base, a connecting arm is fixedly mounted on the output shaft of the servo motor, a connecting pin is fixedly mounted on the movable end of the connecting arm, and a connecting groove with one open end is opened on the connecting base, into which the connecting pin is movably inserted.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution designs air cylinders with different diameters at both ends and changes the air compression stroke through hydraulic transmission and crankshaft and connecting rod transmission. By increasing the cross-section of the pressurization tank, the same air volume is maintained by reducing the air compression frequency. The noise of the equipment is reduced by reducing the piston movement frequency. 2. This solution uses two sets of air compressors installed in reverse to change the connection method with the drive motor. This allows for adjustments to the output power of the drive motor based on the air supply demand, in addition to frequency conversion adjustment of the drive motor. It also allows for adjustments to the output power of different balancing motors at the connection end. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the air compressor and drive mechanism in this invention.

[0016] Figure 3 yes Figure 2 Side view.

[0017] Figure 4 This is a schematic diagram of the casing structure in this invention.

[0018] Figure 5 This is a schematic diagram of the dual-shaft reducer and air compressor in this invention.

[0019] Figure 6 This is a schematic diagram of the crankshaft, connecting rod, and air compressor in this invention.

[0020] Figure 7 This is a schematic diagram of the structure of the air cylinder, transmission rod, and connecting seat in this invention.

[0021] Figure 8 This is a schematic diagram of the structure of the pressure tank, the air compressor piston, and the transmission piston in this invention.

[0022] Explanation of reference numerals in the attached figures: 1. Gas storage tank; 2. Pressurization tank; 3. Housing; 4. Compressor mechanism; 4-1. Compressor cylinder; 4-2. Transmission piston; 4-3. Transmission rod; 5. Drive motor; 6. Drive mechanism; 6-1. Dual-shaft reducer; 6-2. Coupling; 6-3. Crankshaft; 6-4. Connecting rod; 7. Compressor piston; 8. Connecting seat; 9. Transmission seat; 10. Guide rail; 11. Servo motor; 12. Connecting arm; 13. Connecting pin; 14. Connecting groove. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1-8 As shown, the specific implementation adopts the following technical solution: This specific embodiment includes a gas storage tank 1, a pressurizing tank 2, and a housing 3. Two pressurizing tanks 2 are connected in parallel and fixedly mounted on the gas storage tank 1. The outlet end of the pressurizing tank 2 is connected to the inlet end of the gas storage tank 1 via a solenoid valve. A compressor piston 7 is movably mounted inside the pressurizing tank 2. The housing 3 is fixedly mounted on the pressurizing tank 2. The gas outlet pipe, pressurizing tank 2, and housing 3 together form the overall equipment structure. A drive motor 5 is fixedly mounted on the housing 3. A compressor mechanism 4 is installed inside the housing 3 in conjunction with the pressurizing tank 2. The drive motor 5 and the compressor mechanism 4 are connected via a drive mechanism 6. The air compression mechanism 4 includes an air compressor 4-1, a transmission piston 4-2, and a transmission rod 4-3. There are two air compressors 4-1, each fixedly mounted on one of two pressure tanks 2. Each air compressor 4-1 is integrally formed from two cylindrical sections with different inner diameters. The smaller diameter end of one air compressor 4-1 is fixedly mounted on one of the pressure tanks 2, and the larger diameter end of the other air compressor 4-1 is fixedly mounted on the other pressure tank 2. Two transmission pistons 4-2 are arranged as a group and are respectively positioned inside the two ends of the air compressor 4-1. The air compressor 4-1 is positioned... Hydraulic oil is filled between the two transmission pistons 4-2. Transmission rod 4-3 is fixedly mounted on transmission piston 4-2 and extends beyond the port of compressor 4-1. Compressor 4-1 is fixed to one end of pressure tank 2. Transmission rod 4-3 passes through the end wall of pressure tank 2 and is then fixedly mounted on compressor piston 7. The drive mechanism 6 includes a dual-shaft reducer 6-1, crankshaft 6-3, and connecting rod 6-4. The dual-shaft reducer 6-1 is fixedly mounted inside housing 3, and the dual-shaft reducer 6-1 is connected to drive motor 5 via a fastener. The components are connected in a "T"-shaped configuration between the input shaft and the dual output shafts of the dual-shaft reducer 6-1. The output shaft of the drive motor 5 is connected to the input shaft of the dual-shaft reducer 6-1 via a coupling 6-2. There are two crankshafts 6-3, each fixedly mounted on one of the two output shafts of the dual-shaft reducer 6-1, with the two crankshafts 6-3 facing opposite directions at 180°. A connecting rod 6-4 is screwed onto the movable end of each crankshaft 6-3 via a rotating shaft. A guide rail 10 is fixedly mounted on the inner wall of the housing 3. The air compressor 4-1 faces the crankshaft. A connecting seat 8 is fixedly installed on the transmission rod 4-3 inside one end of shaft 6-3. The connecting seat 8 is slidably installed on the guide rail 10. A transmission seat 9 is spun on the movable end of the connecting rod 6-4 via a rotating shaft, and the transmission seat 9 is slidably installed on the guide rail 10. A servo motor 11 is fixedly installed on the transmission seat 9. A connecting arm 12 is fixedly installed on the output shaft of the servo motor 11. A connecting pin 13 is fixedly installed on the movable end of the connecting arm 12. A connecting groove 14 with an open end is opened on the connecting seat 8, and the connecting pin 13 is movably inserted into the connecting groove 14.

[0025] When using this device, the solenoid valve, drive motor 5, and servo motor 11 are connected to the microcontroller, and the solenoid valve, drive motor 5, and servo motor 11 are connected to the power supply. Through the reciprocating motion of the compressor piston 7, high-pressure gas is forced into the air storage tank 1 via the pressurization tank 2. This is achieved by connecting to the air storage tank 1 through a pipeline, enabling the use of high-pressure gas. When the usage volume is low, the microcontroller, in conjunction with the air pressure sensor, adjusts the frequency of the drive motor 5 to reduce its operating power. Conversely, when the usage volume is high, the operating power of the drive motor 5 is increased, achieving variable frequency operation of this air compressor. The drive motor 5 is input through the coupling 6-2 and the dual-shaft reducer 6-1, thus the dual-shaft reducer... 6-1 drives the crankshafts 6-3 on both sides to rotate. The crankshafts 6-3 pull the transmission seat 9 to slide on the guide rail 10 through the connecting rod 6-4. The connecting arm 12 is hung in the connecting groove 14 on the connecting seat 8 through the connecting pin 13, so that the connecting seat 8 is driven to slide back and forth through the transmission seat 9. Thus, the transmission rod 4-3 fixed to the connecting seat 8 drives the transmission piston 4-2 in the compressor cylinder 4-1 facing the crankshaft 6-3 to move back and forth. The hydraulic oil in the compressor cylinder 4-1 drives the transmission piston 4-2 at the end connected to the compressor piston 7 to move, thus driving the compressor piston 7 to move back and forth. This allows the compressor piston 7 to move back and forth in the pressurization tank 2 to fill the gas storage tank 1 with high-pressure gas. The eccentricities of the crankshafts 6-3 on both sides are the same, resulting in the same reciprocating amplitude of the transmission seats 9 connected to each crankshaft 6-3. This means the reciprocating amplitude of the transmission pistons 4-2 at the input ends of the two compressor cylinders 4-1 is the same. Since the two compressor cylinders 4-1 have cylindrical structures with different inner diameters at both ends and are arranged in opposite directions, one compressor cylinder 4-1 pushes its connected compressor piston 7 with a larger reciprocating amplitude, while the compressor piston 7 in the other pressurized tank 2 moves with a smaller amplitude. When low-power, slow-speed gas replenishment to the gas storage tank 1 is required, the servo motor 11 drives the connecting arm 12 to rotate. The connecting arm 12 drives the connecting pin 13, connecting the transmission seat 8 on the side with the smaller compression amplitude to the transmission seat 9. The moving base 9 is connected via the connecting arm 12. The connecting base 8 on the other side with large-amplitude air compression is disconnected from the transmission base 9. Only one side of the air compressor 4-1 is connected to the drive motor 5 and the air compressor piston 7 on that side. The small-amplitude reciprocating motion of the air compressor piston 7 is used to fill the air tank 1. When maintaining the normal air compression speed, only the air compressor 4-1 on the side with large-amplitude output is connected to the drive motor 5. The large-amplitude movement of the air compressor piston 7 in the pressurized tank 2 on that side is used to fill the air tank 1 normally. When it is necessary to quickly replenish the gas in the air tank 1, the air compressors 4-1 on both sides are connected to the drive motor 5. Both pressurized tanks 2 on both sides are used to work and quickly replenish the gas in the air tank 1.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution uses the crankshaft 6-3 and connecting rod 6-4 driven by the drive motor 5 to drive the reciprocating motion of the compressed air piston 7 in the pressure tank 2. In conjunction with the servo control adjustment of the microcontroller, the working output power of the equipment can be adjusted according to different working requirements, and the drive motor 5 can be made to work in a variable frequency manner. 2. This solution uses a hydraulically driven air compressor 4-1 to achieve transmission between the crankshaft 6-3 and the pressure tank 2. The input and output ends of the air compressor 4-1 are made of concrete with different inner diameters, so that the motion amplitude of the output end can be changed while the motion amplitude of the input end is constant, thereby achieving different working power of the two pressure tanks 2. 3. This device uses the docking of the transmission seat 9 and the connecting seat 8 to realize the transmission connection between the crankshaft 6-3 and the air cylinder 4-1. The connecting arm 12 driven by the servo motor 11 realizes the clutch control between the transmission seat 9 and the connecting seat 8. Thus, according to the working power requirements of the equipment, different air cylinders 4-1 can be connected to drive the corresponding pressure tank 2 to work.

[0027] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A low-noise variable frequency air compressor, comprising an air tank (1), a pressurizing tank (2), and a casing (3), wherein the pressurizing tank (2) is fixedly mounted on the air tank (1), and the casing (3) is fixedly mounted on the pressurizing tank (2); characterized in that, It also includes: The air compressor (4) is installed inside the housing (3) and is configured in conjunction with the pressurization tank (2); The drive motor (5) is fixedly mounted on the housing (3); The drive mechanism (6) is used to drive the motor (5) and the air compressor (4).

2. The low-noise variable frequency air compressor according to claim 1, characterized in that: The pressurizing tank (2) consists of two tanks connected in parallel. The outlet end of the pressurizing tank (2) is connected to the inlet end of the gas storage tank (1) through a solenoid valve unit. A compressed air piston (7) is movably installed inside the pressurizing tank (2).

3. A low-noise variable frequency air compressor according to claim 2, characterized in that: The air compressor (4) includes: Air compressor (4-1), there are two air compressors (4-1) and they are fixedly installed on two pressurized tanks (2) respectively. The air compressors (4-1) are installed inside the housing (3); The transmission piston (4-2) consists of two pistons arranged in a group within the two ports of a compressor cylinder (4-1); The transmission rod (4-3) is fixedly mounted on the transmission piston (4-2) and extends out of the air compressor (4-1).

4. A low-noise variable frequency air compressor according to claim 3, characterized in that: The air compressor (4-1) is a two-section cylinder structure with different inner diameters integrally formed. The two transmission pistons (4-2) in one air compressor (4-1) are respectively set in the two sections of the air compressor (4-1). One end of the larger inner diameter of one air compressor (4-1) is fixed on a pressure tank (2), and the other end of the smaller inner diameter of the other air compressor (4-1) is fixed on another pressure tank (2). The transmission rod (4-3) of the air compressor (4-1) fixed in one port of the pressure tank (2) passes through the end plate of the pressure tank (2) and is fixed on the air compressor piston (7).

5. A low-noise variable frequency air compressor according to claim 4, characterized in that: The drive mechanism (6) includes: A dual-shaft reducer (6-1) is fixedly installed inside the housing (3); The output shaft of the drive motor (5) and the input shaft of the dual-shaft reducer (6-1) are connected by a coupling (6-2). Crankshaft (6-3), wherein there are two crankshafts (6-3) and they are respectively fixedly mounted on the two output shafts of the dual-shaft reducer (6-1); Connecting rod (6-4), which is spun onto crankshaft (6-3) via a rotating shaft.

6. A low-noise variable frequency air compressor according to claim 5, characterized in that: The two crankshafts (6-3) on the dual-shaft reducer (6-1) are arranged in opposite directions at 180°.

7. A low-noise variable frequency air compressor according to claim 6, characterized in that: The air compressor (4-1) has a connecting seat (8) fixedly installed on the transmission rod (4-3) inside the crankshaft (6-3) at one end. The connecting rod (6-4) away from the crankshaft (6-3) has a transmission seat (9) spun on the end through a rotating shaft. The transmission seat (9) and the connecting seat (8) are configured to cooperate.

8. A low-noise variable frequency air compressor according to claim 7, characterized in that: The inner wall of the housing (3) is fixedly provided with a guide rail (10), the connecting seat (8) is slidably mounted on the guide rail (10), and the transmission seat (9) is slidably mounted on the guide rail (10).

9. A low-noise variable frequency air compressor according to claim 8, characterized in that: A servo motor (11) is fixedly mounted on the transmission seat (9). A connecting arm (12) is fixedly mounted on the output shaft of the servo motor (11). A connecting pin (13) is fixedly mounted on the movable end of the connecting arm (12). A connecting groove (14) with one end open is opened on the connecting seat (8). The connecting pin (13) is movably inserted into the connecting groove (14).

Images