supercharging device

Abstract

The utility model discloses a kind of supercharging equipment, it is related to supercharger technical field, wherein, including power component, rack, crankshaft connecting rod mechanism and compression component, power component is installed in rack, crankshaft connecting rod mechanism includes crankshaft body and the first connecting rod and second connecting rod of being arranged in crankshaft body, the rotating shaft of power component is coaxial transmission connection with crankshaft body, first connecting rod and second connecting rod are all set in crankshaft body, compression component includes primary compression cylinder and secondary compression cylinder, primary compression cylinder and secondary compression cylinder are all installed in rack, and are respectively arranged in the two sides of crankshaft body;Primary compression cylinder is provided with air inlet, secondary compression cylinder is provided with gas outlet, first connecting rod is transmission connection with the piston rod of primary compression cylinder, second connecting rod is transmission connection with the piston rod of secondary compression cylinder;Two-stage compression cylinder shares same crankshaft connecting rod mechanism, power component is coaxial direct connection with crankshaft, whole machine structure is more compact, effectively reduce the overall size and weight of equipment.

Description

Technical Field

[0001] This utility model relates to the field of booster technology, and in particular to a booster device. Background Technology

[0002] Boosting equipment is widely used in air separation, gas pressurization, and other fields, mainly to boost low-pressure gas to the required pressure for subsequent use. Existing boosting equipment typically uses a motor to drive the compression cylinder via a belt drive mechanism. That is, the output shaft of the motor is connected to the drive shaft of the compression cylinder through pulleys, drive belts, and tensioning components, transmitting the rotational motion of the motor to the compression cylinder, driving the piston inside the compression cylinder to reciprocate and compress the gas.

[0003] However, belt drive mechanisms have a large number of auxiliary components such as pulleys, drive belts, and tensioning assemblies, resulting in a complex structure. Furthermore, belts are prone to wear and aging during long-term use, requiring regular replacement and maintenance. In addition, when two-stage or multi-stage compression is required, multiple independent compression cylinders and corresponding transmission mechanisms are typically needed. The arrangement of these compression cylinders is limited by the belt drive path, making the overall structural layout of the equipment less compact.

[0004] Therefore, it is necessary to provide a new booster device to solve the aforementioned technical problem. Utility Model Content

[0005] The main purpose of this invention is to propose a booster device that aims to improve the technical problems of the complex structure and large size of booster devices in the prior art.

[0006] To achieve the aforementioned objective, this utility model provides a pressurization device for pressurizing inert gases, the inert gases including nitrogen, argon, and helium, comprising: Power components; A frame, on which the power unit is mounted; A crankshaft connecting rod mechanism, comprising a crankshaft body and a first connecting rod and a second connecting rod disposed on the crankshaft body, wherein the rotating shaft of the power component is coaxially connected to the crankshaft body for transmission, and both the first connecting rod and the second connecting rod are sleeved on the crankshaft body; The compression component includes a primary compression cylinder and a secondary compression cylinder, both mounted on the frame and respectively located on both sides of the crankshaft body. The primary compression cylinder has an air inlet, and the secondary compression cylinder has an air outlet. A first connecting rod is drivenly connected to the piston rod of the primary compression cylinder, and a second connecting rod is drivenly connected to the piston rod of the secondary compression cylinder. The primary and secondary compression cylinders are interconnected.

[0007] In one embodiment, the booster device further includes a spiral cooling connecting pipe, through which the primary compression cylinder and the secondary compression cylinder are connected.

[0008] In one embodiment, the booster device further includes a protective cover, a first fixing plate, a second fixing plate, and a locking member. The protective cover is mounted on the frame, and the crankshaft connecting rod mechanism is disposed inside the protective cover. The first fixing plate is connected to the protective cover. The first fixing plate forms a first arc-shaped groove, and the second fixing plate forms a second arc-shaped groove. The first fixing plate and the second fixing plate are connected to each other through the locking member. The first arc-shaped groove and the second arc-shaped groove form a mounting position, and the spiral cooling connecting pipe is fixed to the mounting position.

[0009] In one embodiment, the booster device further includes a flexible coupling, through which the rotating shaft of the power component is coaxially connected to the crankshaft body.

[0010] In one embodiment, the inlet is used to receive the inert gas at a pressure of 4.5 bar and a flow rate of 45 L / min to 50 L / min, and the outlet is used to output the inert gas at a pressure greater than or equal to 45 bar.

[0011] In one embodiment, the power component is a permanent magnet synchronous motor with a power of 1500W, a three-phase 220V power supply, a 4-pole stator winding, a variable frequency speed control range of 600rpm to 3000rpm, an insulation class of F, and a protection class of IP54; or, the power component is a brushless motor.

[0012] In one embodiment, the crankshaft connecting rod mechanism further includes two self-lubricating bushings and two connecting shafts, wherein one connecting shaft is rotatably sleeved on one of the self-lubricating bushings, and the other connecting shaft is rotatably sleeved on the other self-lubricating bushing. The two self-lubricating bushings are respectively sleeved on the sleeve holes of the first connecting rod and the second connecting rod, and the two connecting shafts are respectively connected to the primary compression cylinder and the secondary compression cylinder.

[0013] In one embodiment, both the primary compression cylinder and the secondary compression cylinder are equipped with oil-free piston rings.

[0014] In one embodiment, the booster device further includes a plurality of heat dissipation fins, which are evenly arranged on the cylinder body of the secondary compression cylinder.

[0015] In one embodiment, the booster device further includes at least four fans, two of which are respectively mounted on the top and side of the first-stage compression cylinder; and the other two of which are respectively mounted on the top and side of the second-stage compression cylinder.

[0016] In the above scheme, the pressurization equipment is used to pressurize inert gases, including nitrogen, argon, and helium. The pressurization equipment includes a power unit, a frame, a crankshaft connecting rod mechanism, and a compression unit. The power unit is mounted on the frame. The crankshaft connecting rod mechanism includes a crankshaft body and a first connecting rod and a second connecting rod disposed on the crankshaft body. The rotating shaft of the power unit is coaxially connected to the crankshaft body. Both the first and second connecting rods are sleeved on the crankshaft body. The compression unit includes a primary compression cylinder and a secondary compression cylinder. Both the primary and secondary compression cylinders are mounted on the frame and are respectively disposed on both sides of the crankshaft body. The primary compression cylinder is provided with an air inlet, and the secondary compression cylinder is provided with an air outlet. The first connecting rod is connected to the piston rod of the primary compression cylinder, and the second connecting rod is connected to the piston rod of the secondary compression cylinder. The primary and secondary compression cylinders are interconnected. Specifically, the power unit is installed at one end of the frame, and the crankshaft connecting rod mechanism is installed inside the frame. The crankshaft connecting rod mechanism includes a crankshaft body and a first connecting rod and a second connecting rod sleeved on the crankshaft body. The rotating shaft of the power unit is coaxially connected to the crankshaft body. Then, the primary compression cylinder and the secondary compression cylinder are installed on the top of the frame, with the primary compression cylinder and the secondary compression cylinder located on opposite sides of the crankshaft body. The end of the first connecting rod away from the crankshaft body is connected to the piston rod of the primary compression cylinder, and the end of the second connecting rod away from the crankshaft body is connected to the piston rod of the secondary compression cylinder. Finally, the primary compression cylinder and the secondary compression cylinder are connected to each other through pipelines. After assembly, it can be put into use.

[0017] Taking nitrogen as an example, after the power unit is started, its rotating shaft rotates, driving the crankshaft body to rotate synchronously. During the rotation of the crankshaft body, the first and second connecting rods reciprocate. The oscillation of the first connecting rod causes the piston rod of the first-stage compression cylinder to reciprocate linearly within the cylinder, thereby causing the piston of the first-stage compression cylinder to reciprocate and extend within the cylinder. The oscillation of the second connecting rod causes the piston rod of the second-stage compression cylinder to reciprocate linearly within the cylinder, thereby causing the piston of the second-stage compression cylinder to reciprocate and extend within the cylinder. Since the first-stage and second-stage compression cylinders are respectively located on both sides of the crankshaft body, when the crankshaft body rotates, the oscillation directions of the first and second connecting rods are opposite. This means that when the piston of the first-stage compression cylinder moves upward to compress, the piston of the second-stage compression cylinder moves downward to draw in air, and vice versa. The two-stage compression cylinders alternately complete the compression stroke and the intake stroke. Low-pressure gas enters the first-stage compression cylinder through the inlet, and after being compressed by the first-stage compression cylinder, it becomes medium-pressure gas. Then, it enters the second-stage compression cylinder through the connecting pipeline, and after being compressed again by the second-stage compression cylinder, it becomes high-pressure gas. Finally, it is output from the outlet for terminal use.

[0018] This invention replaces the belt drive mechanism with a crankshaft connecting rod mechanism, eliminating auxiliary transmission components such as pulleys, transmission belts, and tensioning assemblies, simplifying the transmission structure and reducing the number of parts in the whole machine. At the same time, the primary and secondary compression cylinders are respectively located on both sides of the crankshaft body, and the two cylinders share the same crankshaft body. There is no need to set up multiple independent transmission mechanisms, and the arrangement of each compression cylinder is not limited by the belt drive path. The overall structure is more compact, effectively reducing the overall size of the equipment, which is conducive to realizing the miniaturization and lightweight design of the booster equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of an embodiment of the booster device provided by this utility model; Figure 2 A schematic diagram of another embodiment of the booster device provided by this utility model; Figure 3 A partial schematic diagram of an embodiment of the booster device provided by this utility model; Figure 4 A top view of an embodiment of the booster device provided by this utility model; Figure 5 for Figure 4 Sectional view at AA; Figure 6 for Figure 4 Sectional view at BB; Figure 7 A schematic diagram of an embodiment of the first fixing plate and the second fixing plate provided by this utility model.

[0021] Explanation of icon numbers: 100. Boosting equipment; 1. Power component; 2. Frame; 3. Crankshaft connecting rod mechanism; 31. Crankshaft body; 311. Main journal; 311a. First fixing groove; 312. Crank pin; 313. Crank arm; 313a. First mounting hole; 313b. Second mounting hole; 313c. Second fixing groove; 314. Fixing key; 32. First connecting rod; 33. Second connecting rod; 34. Self-lubricating bushing; 35. Connecting shaft; 4. Compression component; 41. First stage compression cylinder; 411. Inlet; 42. Second stage compression cylinder; 421. Outlet; 5. Spiral cooling connecting pipe; 6. Protective cover; 7. First fixing plate; 71. First arc groove; 8. Second fixing plate; 81. Second arc groove; 9. Flexible coupling; 101. Heat dissipation fins; 102. Fan; 103. Oil-free piston ring.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] For your purpose, please refer to Figures 1 to 6 This utility model proposes a booster device 100 for boosting inert gases, including nitrogen, argon, and helium. The booster device 100 includes a power component 1, a frame 2, a crankshaft connecting rod mechanism 3, and a compression component 4. The power component 1 is mounted on the frame 2. The crankshaft connecting rod mechanism 3 includes a crankshaft body 31 and a first connecting rod 32 and a second connecting rod 33 disposed on the crankshaft body 31. The rotating shaft of the power component 1 is coaxially connected to the crankshaft body 31. Both the first connecting rod 32 and the second connecting rod 33... The compression component 4, which is fitted onto the crankshaft body 31, includes a primary compression cylinder 41 and a secondary compression cylinder 42. Both the primary compression cylinder 41 and the secondary compression cylinder 42 are mounted on the frame 2 and are respectively located on both sides of the crankshaft body 31. The primary compression cylinder 41 is provided with an air inlet 411, and the secondary compression cylinder 42 is provided with an air outlet 421. The first connecting rod 32 is drivenly connected to the piston rod of the primary compression cylinder 41, and the second connecting rod 33 is drivenly connected to the piston rod of the secondary compression cylinder 42. The primary compression cylinder 41 and the secondary compression cylinder 42 are interconnected. Specifically, the power unit 1 is installed at one end of the frame 2, and the crankshaft connecting rod mechanism 3 is installed inside the frame 2. The crankshaft connecting rod mechanism 3 includes a crankshaft body 31 and a first connecting rod 32 and a second connecting rod 33 sleeved on the crankshaft body 31. The rotating shaft of the power unit 1 is coaxially connected to the crankshaft body 31. Then, the primary compression cylinder 41 and the secondary compression cylinder 42 are respectively installed on the top of the frame 2, and the primary compression cylinder 41 and the secondary compression cylinder 42 are respectively located on both sides of the crankshaft body 31. The end of the first connecting rod 32 away from the crankshaft body 31 is connected to the piston rod of the primary compression cylinder 41, and the end of the second connecting rod 33 away from the crankshaft body 31 is connected to the piston rod of the secondary compression cylinder 42. Finally, the primary compression cylinder 41 and the secondary compression cylinder 42 are connected to each other through pipelines. After assembly, it can be put into use.

[0027] Taking nitrogen as an example, after the power unit 1 is started, its rotating shaft rotates and drives the crankshaft body 31 to rotate synchronously. During the rotation, the crankshaft body 31 drives the first connecting rod 32 and the second connecting rod 33 to swing back and forth. The swing of the first connecting rod 32 drives the piston rod of the first-stage compression cylinder 41 to make reciprocating linear motion in the cylinder, thereby driving the piston of the first-stage compression cylinder 41 to reciprocate and extend in the cylinder. The swing of the second connecting rod 33 drives the piston rod of the second-stage compression cylinder 42 to make reciprocating linear motion in the cylinder, thereby driving the piston of the second-stage compression cylinder 42 to reciprocate and extend in the cylinder. Since the first-stage compression cylinder 41 and the second-stage compression cylinder 42 are respectively located on both sides of the crankshaft body 31, when the crankshaft body 31 rotates, the swing directions of the first connecting rod 32 and the second connecting rod 33 are opposite. This means that when the piston of the first-stage compression cylinder 41 moves upward to compress, the piston of the second-stage compression cylinder 42 moves downward to draw in air, and when the piston of the first-stage compression cylinder 41 moves downward to draw in air, the piston of the second-stage compression cylinder 42 moves upward to compress. The two-stage compression cylinders alternately complete the compression stroke and the intake stroke. Low-pressure gas enters the first-stage compression cylinder 41 through the inlet 411. After being compressed by the first-stage compression cylinder 41, it becomes medium-pressure gas. Then, it enters the second-stage compression cylinder 42 through the connecting pipeline. After being compressed again by the second-stage compression cylinder 42, it becomes high-pressure gas. Finally, it is output from the outlet 421 for terminal use.

[0028] This embodiment replaces the belt drive mechanism with a crankshaft connecting rod mechanism 3, eliminating auxiliary transmission components such as pulleys, transmission belts, and tensioning assemblies, simplifying the transmission structure and reducing the number of parts in the whole machine. At the same time, the primary compression cylinder 41 and the secondary compression cylinder 42 are respectively located on both sides of the crankshaft body 31, and the two cylinders share the same crankshaft body 31. There is no need to set up multiple independent transmission mechanisms, and the arrangement of each compression cylinder is not limited by the belt drive path. The overall structure is more compact, effectively reducing the overall size of the equipment, which is conducive to realizing the miniaturization and lightweight design of the booster equipment 100.

[0029] Please see Figures 2 to 5In one embodiment, the booster device 100 further includes a spiral cooling connecting pipe 5, through which the primary compression cylinder 41 and the secondary compression cylinder 42 are connected. After the power unit 1 is started, its rotating shaft rotates and drives the crankshaft body 31 to rotate synchronously. During the rotation, the crankshaft body 31 drives the first connecting rod 32 and the second connecting rod 33 to swing back and forth. The swing of the first connecting rod 32 drives the piston rod of the primary compression cylinder 41 to make reciprocating linear motion in the cylinder, thereby driving the piston of the primary compression cylinder 41 to reciprocate and extend in the cylinder. The swing of the second connecting rod 33 drives the piston rod of the secondary compression cylinder 42 to make reciprocating linear motion in the cylinder, thereby driving the piston of the secondary compression cylinder 42 to reciprocate and extend in the cylinder. Since the primary compression cylinder 41 and the secondary compression cylinder 42 are respectively located on both sides of the crankshaft body 31, when the crankshaft body 31 rotates, the first connecting rod 32 and the second connecting rod 33 swing in opposite directions. This causes the piston of the primary compression cylinder 41 to move upwards for compression, while the piston of the secondary compression cylinder 42 moves downwards for intake, and vice versa. The two compression cylinders alternately complete the compression stroke and intake stroke. Low-pressure gas enters the primary compression cylinder 41 through the inlet 411. After being compressed by the primary compression cylinder 41, it forms medium-pressure gas with a higher temperature. This medium-pressure gas enters the spiral cooling connecting pipe 5 through the exhaust port of the primary compression cylinder 41. The spiral cooling connecting pipe 5 is spirally coiled, which prolongs the gas flow path and heat dissipation time. During the process of flowing through the spiral cooling connecting pipe 5, the gas fully exchanges heat with the external environment, and the temperature is effectively reduced. Subsequently, the cooled medium-pressure gas enters the secondary compression cylinder 42, and after being compressed again by the secondary compression cylinder 42, it forms high-pressure gas, which is finally output from the outlet 421 for end use.

[0030] In this embodiment, by setting up a spiral cooling connecting pipe 5, the medium-pressure gas discharged from the first-stage compression cylinder 41 is fully cooled before entering the second-stage compression cylinder 42, thereby reducing the intake temperature of the second-stage compression cylinder 42, reducing the compression power consumption of the second-stage compression cylinder 42, and improving the overall compression efficiency of the machine.

[0031] Please see Figure 1 , Figure 2 and Figure 7In one embodiment, the booster device 100 further includes a protective cover 6, a first fixing plate 7, a second fixing plate 8, and a locking member. The protective cover 6 is installed on the frame 2, and the crankshaft connecting rod mechanism 3 is disposed inside the protective cover 6. The first fixing plate 7 is connected to the protective cover 6. The first fixing plate 7 forms a first arc-shaped groove 71, and the second fixing plate 8 forms a second arc-shaped groove 81. The first fixing plate 7 and the second fixing plate 8 are connected to each other by the locking member. The first arc-shaped groove 71 and the second arc-shaped groove 81 form an installation position, and the spiral cooling connecting pipe 5 is fixed to the installation position. The power unit 1 is installed at one end of the frame 2, and the crankshaft connecting rod mechanism 3 is then installed on the frame 2. The rotating shaft of the power unit 1 is coaxially connected to the crankshaft body 31. The protective cover 6 is then installed on the frame 2, and the crankshaft connecting rod mechanism 3 is enclosed inside the protective cover 6. The first-stage compression cylinder 41 and the second-stage compression cylinder 42 are then installed on the top of the frame 2, respectively, and located on both sides of the crankshaft body 31. The first connecting rod 32 is connected to the piston rod of the first-stage compression cylinder 41, and the second connecting rod 33 is connected to the piston rod of the second-stage compression cylinder 42. One end of the spiral cooling connecting pipe 5 is then connected to the exhaust port of the first-stage compression cylinder 41. The other end of the spiral cooling connecting pipe 5 is connected to the air inlet 411 of the secondary compression cylinder 42. Then, the first fixing plate 7 is connected to the protective cover 6. The spiral cooling connecting pipe 5 is placed in the first arc groove 71 of the first fixing plate 7. Then, the second fixing plate 8 is placed on the first fixing plate 7 and the second arc groove 81 of the second fixing plate 8 is aligned with the first arc groove 71. The first fixing plate 7 and the second fixing plate 8 are locked together by the locking member, so that the first arc groove 71 and the second arc groove 81 together form the mounting position for clamping the spiral cooling connecting pipe 5, thereby fixing the spiral cooling connecting pipe 5 on the protective cover 6. After assembly, it can be put into use.

[0032] In this embodiment, the crankshaft connecting rod mechanism 3 is enclosed by a protective cover 6, which effectively prevents external dust and impurities from entering the crankshaft connecting rod mechanism 3, reduces wear on moving parts, and prevents operators from contacting moving parts, thus improving the safety and reliability of equipment operation. By setting a first fixing plate 7 and a second fixing plate 8, the spiral cooling connecting pipe 5 is clamped and fixed by the mounting position formed by the mating of the first arc groove 71 and the second arc groove 81. The spiral cooling connecting pipe 5 can be reliably fixed without additional welding or binding. The installation operation is simple, the fixing structure is stable, and it is convenient for subsequent disassembly and maintenance.

[0033] Please see Figure 5In one embodiment, the booster device 100 further includes a flexible coupling 9, through which the rotating shaft of the power component 1 is coaxially connected to the crankshaft body 31. This embodiment, by providing the flexible coupling 9, achieves an elastic connection between the rotating shaft of the power component 1 and the crankshaft body 31. During power transmission, the flexible coupling 9 can absorb and buffer the torsional vibration and impact load generated by the rotation of the crankshaft body 31, reducing the transmission of vibration to the power component 1 and the frame 2, thereby reducing vibration and noise during overall machine operation. Simultaneously, the flexible coupling 9 can compensate for minor coaxiality deviations between the rotating shaft and the crankshaft body 31 caused by machining errors or assembly deviations, reducing the requirements for assembly precision and simplifying assembly.

[0034] In one embodiment, the inlet is used to receive inert gas with a pressure of 4.5 bar and a flow rate of 45 L / min to 50 L / min, and the outlet is used to output inert gas with a pressure greater than or equal to 45 bar. During operation, the inert gas with a pressure of 4.5 bar and a flow rate of 45 L / min to 50 L / min enters the first-stage compression cylinder through the inlet. After being compressed by the first-stage compression cylinder, it forms a medium-pressure gas, which then enters the second-stage compression cylinder through a connecting pipeline. After being compressed again by the second-stage compression cylinder, it forms a high-pressure inert gas with a pressure ≥ 45 bar, and is finally output from the outlet for terminal use. This embodiment sets the inlet pressure to 4.5 bar, the inlet flow rate to 45 L / min to 50 L / min, and the output pressure to ≥45 bar. This ensures that the inlet parameters of the booster device are precisely matched with the output parameters of upstream low-flow gas source devices such as mobile nitrogen generators. It can be directly connected and used without additional pressure regulating or stabilizing devices. At the same time, the output pressure meets the pressure requirements of downstream applications such as nitrogen filling and pressure testing of air conditioning pipelines and pressurization of small pressure vessels. This makes the booster device suitable for applications with low flow and high pressure requirements, improving the compatibility and plug-and-play nature of the booster device with upstream and downstream equipment.

[0035] In one embodiment, the power component is a permanent magnet synchronous motor with a power of 1500W, a three-phase 220V power supply, a 4-pole stator winding, a variable frequency speed control range of 600rpm to 3000rpm, an insulation class of F, and a protection class of IP54. Alternatively, the power component may be a brushless motor. During operation, the permanent magnet synchronous motor or brushless motor starts, its rotating shaft rotates, and drives the crankshaft body to rotate synchronously. During rotation, the crankshaft body drives the first and second connecting rods to reciprocate. The reciprocating motion of the first and second connecting rods respectively drives the piston rods of the first and second compression cylinders to reciprocate linearly within their respective cylinders, thereby driving the first and second compression cylinders to alternately complete the compression and intake strokes, achieving gas pressurization.

[0036] In this embodiment, the power of the permanent magnet synchronous motor is set to 1500W to meet the power consumption requirements of the two-stage compression cylinder under the conditions of 4.5bar intake and output greater than or equal to 45bar. This ensures sufficient power to drive the two-stage compression while avoiding excessive power that would increase the overall energy consumption and weight of the machine. The power supply adopts three-phase 220V, which is compatible with the industrial power supply environment commonly used in mobile nitrogen generators, ensuring power supply compatibility. The stator winding adopts a 4-pole arrangement, so that the motor's base frequency synchronous speed is 1500rpm under a 50Hz power supply. Combined with the variable frequency speed regulation range of 600rpm to 3000rpm, it can provide sufficient torque to drive the piston to compress gas at low speeds and increase the exhaust volume at high speeds, adapting to the flow requirements under different operating conditions. The insulation class is F, ensuring the heat resistance reliability of the motor during long-term operation under oil-free pressurization conditions and avoiding insulation failure due to excessive temperature rise. The protection class is IP54, which effectively prevents dust and moisture from entering the motor and improves its durability in mobile operating environments. This embodiment replaces the traditional three-phase or single-phase asynchronous motor with a belt pulley reduction transmission structure by using a permanent magnet synchronous motor or brushless motor. This eliminates auxiliary transmission components such as belt pulleys, transmission belts, tensioning components, and external brackets, thus eliminating belt friction loss and tension loss, significantly improving transmission efficiency. At the same time, the motor itself has the characteristics of high efficiency and low heat generation, reducing the overall energy consumption of the machine. Furthermore, there is no need to regularly replace vulnerable parts such as belts, greatly reducing the frequency of maintenance and making the equipment operation more stable and reliable.

[0037] Please see Figure 5In one embodiment, the crankshaft body 31 includes a main journal 311, a crank pin 312, and a crank arm 313. The main journal 311 is coaxially connected to the rotating shaft of the power component 1. The crank arm 313 has a first mounting hole 313a and a second mounting hole 313b at both ends. The first mounting hole 313a and the second mounting hole 313b are eccentrically arranged. The main journal 311 is installed in the first mounting hole 313a, the crank pin 312 is installed in the second mounting hole 313b, and the first connecting rod 32 and the second connecting rod 33 are both sleeved on the crank pin 312. The main journal 311 is installed in the first mounting hole 313a of the crank arm 313, fixing the main journal 311 to the crank arm 313. Then, the crank pin 312 is installed in the second mounting hole 313b of the crank arm 313, fixing the crank pin 312 to the crank arm 313. Due to the eccentric arrangement of the first mounting hole 313a and the second mounting hole 313b, there is an eccentricity between the axis of the main journal 311 and the axis of the crank pin 312. Then, the first connecting rod 32 and the second connecting rod 33 are connected... The first connecting rod 32 and the second connecting rod 33 are respectively fitted onto the crank pin 312, so that they can both rotate around the crank pin 312. Then, the main journal 311 is coaxially connected to the rotating shaft of the power component 1. Finally, the first-stage compression cylinder 41 and the second-stage compression cylinder 42 are respectively installed on the top of the frame 2 and located on both sides of the crankshaft body 31. The first connecting rod 32 is connected to the piston rod of the first-stage compression cylinder 41, and the second connecting rod 33 is connected to the piston rod of the second-stage compression cylinder 42. After assembly, it can be put into use.

[0038] After the power unit 1 is started, its rotating shaft rotates and drives the main journal 311 to rotate synchronously. The main journal 311 drives the crank arm 313 to rotate around the axis of the main journal 311. During the rotation, the crank arm 313 drives the crank pin 312 to make a circular motion around the axis of the main journal 311. The first connecting rod 32 and the second connecting rod 33, which are sleeved on the crank pin 312, swing back and forth under the drive of the crank pin 312. The swing of the first connecting rod 32 drives the piston rod of the first stage compression cylinder 41 to make a reciprocating linear motion in the cylinder. The swing of the second connecting rod 33 drives the piston rod of the second stage compression cylinder 42 to make a reciprocating linear motion in the cylinder. Because there is an eccentricity between the axis of the main journal 311 and the axis of the crank pin 312, this eccentricity is the rotation radius of the crank, which determines the reciprocating stroke length of the piston. For each revolution of the crank arm 313, the first connecting rod 32 and the second connecting rod 33 each complete one reciprocating oscillation, thereby driving the pistons of the first-stage compression cylinder 41 and the second-stage compression cylinder 42 to complete one reciprocating extension / retraction motion. Since the first-stage compression cylinder 41 and the second-stage compression cylinder 42 are respectively located on both sides of the crankshaft body 31, when the crankshaft body 31 rotates, the oscillation directions of the first connecting rod 32 and the second connecting rod 33 are opposite. This results in the piston of the first-stage compression cylinder 41 moving upwards to compress air while the piston of the second-stage compression cylinder 42 moves downwards to draw in air, and vice versa. The two compression cylinders alternately complete the compression stroke and the intake stroke. Low-pressure gas enters the first-stage compression cylinder 41 through the inlet 411. After being compressed by the first-stage compression cylinder 41, it becomes medium-pressure gas. Then, it enters the second-stage compression cylinder 42 through the connecting pipeline. After being compressed again by the second-stage compression cylinder 42, it becomes high-pressure gas. Finally, it is output from the outlet 421 for terminal use.

[0039] In this embodiment, the main journal 311 and the crank pin 312 are respectively installed in the first mounting hole 313a and the second mounting hole 313b eccentrically set at both ends of the crank arm 313, so that the axis of the main journal 311 and the axis of the crank pin 312 form an eccentricity, thereby converting the rotational motion of the power component 1 into the reciprocating oscillation of the first connecting rod 32 and the second connecting rod 33, which in turn drives the pistons of the first-stage compression cylinder 41 and the second-stage compression cylinder 42 to reciprocate, thereby realizing gas compression. At the same time, the split assembly structure of the main journal 311, the crank arm 313 and the crank pin 312 facilitates the independent processing and replacement of each component, reduces the processing difficulty and maintenance cost, and the first connecting rod 32 and the second connecting rod 33 are both sleeved on the same crank pin 312, resulting in a compact structure and reducing the axial dimension of the crankshaft body 31.

[0040] Please see Figure 5In one embodiment, the crankshaft body 31 further includes a fixing key 314, the main journal 311 is formed with a first fixing groove 311a, the inner wall of the first mounting hole 313a is formed with a second fixing groove 313c, a part of the fixing key 314 is installed in the first fixing groove 311a, and the other part of the fixing key 314 is installed in the second fixing groove 313c. In this embodiment, a fixing key 314 is provided, and a first fixing groove 311a is opened on the main journal 311, and a second fixing groove 313c is opened on the inner wall of the first mounting hole 313a. A part of the fixing key 314 is embedded in the first fixing groove 311a and the other part is embedded in the second fixing groove 313c, so that a key connection is formed between the main journal 311 and the crank arm 313. During the power transmission process, the fixing key 314 can effectively transmit torque and prevent relative rotation between the main journal 311 and the crank arm 313, ensuring that the main journal 311 and the crank arm 313 always maintain synchronous rotation, thereby improving the connection reliability and transmission stability of the crankshaft body 31 during long-term operation.

[0041] Please see Figure 3 and Figure 6 In one embodiment, the crankshaft connecting rod mechanism 3 further includes two self-lubricating bushings 34 and two connecting shafts 35, wherein one connecting shaft 35 is rotatably sleeved on one of the self-lubricating bushings 34, and the other connecting shaft 35 is rotatably sleeved on the other self-lubricating bushing 34. The two self-lubricating bushings 34 are respectively sleeved on the sleeve holes of the first connecting rod 32 and the second connecting rod 33, and the two connecting shafts 35 are respectively connected to the first-stage compression cylinder 41 and the second-stage compression cylinder 42. Self-lubricating bushings 34 are respectively installed in the sleeve holes of the first connecting rod 32 and the second connecting rod 33, and the two connecting shafts 35 are respectively rotatably fitted into the two self-lubricating bushings 34, so that the connecting shafts 35 and the connecting rods are rotatably connected. At the same time, the self-lubricating bushings 34 have self-lubricating properties, and can form a stable lubrication interface between the connecting shafts 35 and the connecting rods without the need for additional lubricating oil. This effectively reduces the frictional resistance and wear between the connecting shafts 35 and the connecting rods, and extends the service life of the moving parts. In addition, the self-lubricating bushings 34 eliminate the maintenance procedure of periodically adding lubricating oil, reducing the maintenance frequency and cost of the equipment.

[0042] Please see Figure 6In one embodiment, both the primary compression cylinder 41 and the secondary compression cylinder 42 are equipped with oil-free piston rings 103. The oil-free piston rings 103 in the primary and secondary compression cylinders 41 and 42 enable a sliding seal between the piston and the cylinder wall without lubrication. During the piston's reciprocating motion, the oil-free piston rings 103 tightly adhere to the cylinder wall, effectively preventing gas leakage from the gap between the piston and cylinder, thus ensuring compression efficiency. Simultaneously, since no lubricating oil is required, the compressed gas is not contaminated by oil mist, resulting in high purity output gas. This is suitable for applications requiring high gas cleanliness and eliminates the need for lubricating oil filling, replacement, and oil circuit maintenance, reducing the daily maintenance costs of the equipment.

[0043] Please see Figure 1 , Figure 2 , Figure 4 and Figure 6 In one embodiment, the booster device 100 further includes a plurality of heat dissipation fins 101, which are uniformly arranged on the cylinder body of the secondary compression cylinder 42. The uniform arrangement of the heat dissipation fins 101 on the cylinder body of the secondary compression cylinder 42 increases the contact area between the cylinder body and the external air. The large amount of heat generated when the gas is compressed within the secondary compression cylinder 42 is conducted through the cylinder body to the heat dissipation fins 101, and then dissipated into the surrounding air by the heat dissipation fins 101. This effectively reduces the cylinder body temperature of the secondary compression cylinder 42, preventing the oil-free piston ring 103 from aging prematurely or its sealing performance from deteriorating due to excessively high temperatures. This extends the service life of the oil-free piston ring 103 and the cylinder body, ensuring the stability of the compression performance of the equipment during long-term operation.

[0044] Please see Figure 7 In one embodiment, the booster device 100 further includes at least four fans 102, two of which are respectively installed on the top and side of the primary compression cylinder 41; and the other two fans 102 are respectively installed on the top and side of the secondary compression cylinder 42. With two fans 102 installed on the top and side of the primary compression cylinder 41 and the other two fans 102 installed on the top and side of the secondary compression cylinder 42, the fans 102 force airflow onto the cylinder surfaces of the primary and secondary compression cylinders 41 and 42 during operation. This accelerates the airflow over the cylinder surfaces and around the heat dissipation fins 101, allowing the heat conducted by the heat dissipation fins 101 to be carried away by the airflow more quickly. This significantly improves the heat dissipation efficiency of the primary and secondary compression cylinders 41 and 42, ensuring that the compression cylinders maintain a low operating temperature during long-term continuous operation, which is beneficial for improving the stability and reliability of the equipment operation.

[0045] In this design, the booster unit 100 includes a power component 1, a frame 2, a crankshaft connecting rod mechanism 3, and a compression component 4. The power component 1 is a permanent magnet synchronous motor with a power of 1500W, three-phase 220V, 4-pole design, frequency conversion speed range of 600rpm to 3000rpm, F-class insulation, IP54 protection rating, and a lightweight aluminum alloy housing. The frame 2 is constructed from aerospace-grade aluminum alloy profiles and thin-walled high-strength plates, and has rubber shock-absorbing feet at the bottom. The power component 1 is mounted at one end of the frame 2.

[0046] The crankshaft connecting rod mechanism 3 is housed inside the frame 2. The crankshaft body 31, the first connecting rod 32, and the second connecting rod 33 are all made of high-strength, lightweight aluminum alloy forgings. The rotating shaft of the power component 1 is coaxially connected to the main journal 311 via a flexible coupling 9, thereby achieving a coaxial transmission connection between the power component 1 and the crankshaft body 31. The crankshaft connecting rod mechanism 3 also includes two self-lubricating bushings 34 and two connecting shafts 35. The self-lubricating bushings 34 are copper-based or stainless steel-based. One connecting shaft 35 is rotatably fitted onto one of the self-lubricating bushings 34, and the other connecting shaft 35 is rotatably fitted onto the other self-lubricating bushing 34. The two self-lubricating bushings 34 are respectively fitted into the sleeve holes of the first connecting rod 32 and the second connecting rod 33. A protective cover 6 is provided outside the crankshaft connecting rod mechanism 3. The protective cover 6 is installed on the frame 2 and encloses the crankshaft connecting rod mechanism 3 inside the protective cover 6.

[0047] The compression component 4 includes a primary compression cylinder 41 and a secondary compression cylinder 42, both mounted on top of the frame 2 and respectively located on both sides of the crankshaft body 31. The primary compression cylinder 41 has a diameter of 30 mm, and the secondary compression cylinder 42 has a diameter of 12 mm. The two compression cylinders share the crank stroke of the crankshaft body 31, which is 18 mm. The piston dead center clearance is controlled within 5% of the displacement per revolution. The primary compression cylinder 41 is provided with an inlet 411 for receiving low-pressure nitrogen gas at a pressure of 4.5 bar and a flow rate of 45 L / min to 50 L / min. The secondary compression cylinder 42 is provided with an outlet 421 for outputting high-pressure nitrogen gas at a pressure greater than or equal to 45 bar. The first connecting rod 32 is connected to the piston rod of the primary compression cylinder 41 via one of the connecting shafts 35, and the second connecting rod 33 is connected to the piston rod of the secondary compression cylinder 42 via the other connecting shaft 35. Both the primary compression cylinder 41 and the secondary compression cylinder 42 are equipped with oil-free piston rings 103. The oil-free piston rings 103 are made of a composite material of glass fiber, copper, and PTFE. The inner wall of the cylinder is honed, with a roughness Ra less than or equal to 0.4 μm. The single-sided clearance between the piston and the cylinder wall is 0.03 mm to 0.05 mm. The primary compression cylinder 41 has a first stainless steel high-pressure one-way intake valve at its inlet 411 and a first stainless steel high-pressure one-way exhaust valve at its outlet. The pressure resistance of the first stainless steel high-pressure one-way intake valve and the first stainless steel high-pressure one-way exhaust valve is greater than or equal to 17 bar. The secondary compression cylinder 42 has a second stainless steel high-pressure one-way intake valve at its inlet 411 and a second stainless steel high-pressure one-way exhaust valve at its outlet 421. The pressure resistance of the second stainless steel high-pressure one-way intake valve and the second stainless steel high-pressure one-way exhaust valve is greater than or equal to 60 bar. The pipeline of the first-stage compression cylinder 41 is equipped with an 18-bar safety valve, and the pipeline of the second-stage compression cylinder 42 is equipped with a 60-bar safety valve.

[0048] When the power unit 1 is started, its rotating shaft rotates and drives the main journal 311 to rotate synchronously through the flexible coupling 9. The main journal 311 drives the crank arm 313 to rotate around the axis of the main journal 311. During the rotation, the crank arm 313 drives the crank pin 312 to make a circular motion around the axis of the main journal 311. The first connecting rod 32 and the second connecting rod 33, which are sleeved on the crank pin 312, oscillate back and forth under the drive of the crank pin 312. The oscillation of the first connecting rod 32 drives the piston rod of the first-stage compression cylinder 41 to make a reciprocating linear motion in the cylinder through one of the connecting shafts 35, thereby driving the piston of the first-stage compression cylinder 41 to reciprocate and extend in the cylinder. The oscillation of the second connecting rod 33 drives the piston rod of the second-stage compression cylinder 42 to make a reciprocating linear motion in the cylinder through the other connecting shaft 35, thereby driving the piston of the second-stage compression cylinder 42 to reciprocate and extend in the cylinder. Since the primary compression cylinder 41 and the secondary compression cylinder 42 are respectively located on both sides of the crankshaft body 31, when the crankshaft body 31 rotates, the first connecting rod 32 and the second connecting rod 33 swing in opposite directions. This causes the piston of the primary compression cylinder 41 to move upward to compress air while the piston of the secondary compression cylinder 42 moves downward to draw in air, and vice versa. The two compression cylinders alternately complete the compression stroke and the intake stroke. Low-pressure nitrogen gas at 4.5 bar enters the first-stage compression cylinder 41 through the first stainless steel high-pressure one-way inlet valve from the inlet 411. After being compressed to 15 bar by the first-stage compression cylinder 41, it forms medium-pressure nitrogen gas. This medium-pressure nitrogen gas is discharged through the first stainless steel high-pressure one-way exhaust valve and enters the spiral cooling connecting pipe 5. During its flow in the spiral cooling connecting pipe 5, it fully exchanges heat with the external environment, and its temperature drops to less than or equal to 50°C. Then, it enters the second-stage compression cylinder 42 through the second stainless steel high-pressure one-way inlet valve. After being compressed again by the second-stage compression cylinder 42 to greater than or equal to 45 bar, it forms high-pressure nitrogen gas, which is output from the outlet 421 through the second stainless steel high-pressure one-way exhaust valve for terminal use. During this process, the heat dissipation fins 101 on the cylinder bodies of the primary compression cylinder 41 and the secondary compression cylinder 42 conduct the heat generated by compression to the air. The fan 102 forces airflow to accelerate the airflow around the heat dissipation fins 101, further improving the heat dissipation efficiency. The 18-bar safety valve on the primary pipeline and the 60-bar safety valve on the secondary pipeline automatically open to release pressure when the pipeline pressure exceeds the set value, ensuring the safe operation of the equipment.

[0049] By replacing the belt drive mechanism with a crankshaft connecting rod mechanism 3, auxiliary transmission components such as pulleys, transmission belts, and tensioning components are eliminated, simplifying the transmission structure, reducing the number of parts in the whole machine, shortening the transmission path, reducing energy loss, and increasing transmission efficiency by 8% to 12%. Moreover, there are no easily damaged belt parts, reducing the frequency of later maintenance. By setting up an elastic coupling 9, the rotating shaft of the power component 1 is elastically connected to the crankshaft body 31, which can absorb and buffer the torsional vibration and impact load generated when the crankshaft body 31 rotates, reduce the transmission of vibration to the power component 1 and the frame 2, reduce the vibration and noise of the whole machine during operation, and at the same time compensate for the small coaxiality deviation between the rotating shaft and the crankshaft body 31 caused by machining errors or assembly deviations, reducing the assembly accuracy requirements. The primary compression cylinder 41 and the secondary compression cylinder 42 are respectively located on both sides of the crankshaft body 31. Both cylinders share the same crankshaft body 31, eliminating the need for multiple independent transmission mechanisms. The symmetrical layout of the two cylinders ensures balanced force distribution on the crankshaft body 31 during rotation, resulting in smooth equipment operation. The arrangement of each compression cylinder is not limited by the belt drive path, making the overall structure more compact and effectively reducing the overall size of the equipment. The primary compression cylinder 41 has a 30mm bore, and the secondary compression cylinder 42 has a 12mm bore, both with a uniform 18mm piston stroke, precisely matching the two-stage pressurization conditions of the mobile nitrogen generator: 4.5bar intake, 45L / min to 50L / min flow rate, 15bar intermediate pressure, and a final pressure greater than or equal to 45bar. By installing oil-free piston rings 103 made of glass fiber, copper, and PTFE composite material in the primary compression cylinder 41 and the secondary compression cylinder 42, and with the cylinder inner wall honed to Ra less than or equal to 0.4μm and the piston-cylinder wall single-sided clearance of 0.03mm to 0.05mm, oil-free pure friction sealing is achieved. The compressed nitrogen gas is free of oil pollution and has high gas purity, while eliminating the need for lubricant filling, replacement, and oil circuit maintenance. By setting up a spiral cooling connecting pipe 5, the medium-pressure gas discharged from the primary compression cylinder 41 is fully cooled before entering the secondary compression cylinder 42, reducing the intake temperature and compression power consumption of the secondary compression cylinder 42 and improving the overall compression efficiency. The spiral cooling connecting pipe 5 is clamped and fixed by the mounting position formed by the first arc groove 71 and the second arc groove 81 of the first fixing plate 7 and the second fixing plate 8, which can achieve reliable fixation without additional welding or binding, making installation and operation simple and facilitating subsequent disassembly and maintenance. By incorporating integrated heat dissipation fins 101 on the cylinder bodies of the primary compression cylinder 41 and the secondary compression cylinder 42, and installing fans 102 on the top and sides of the two cylinders respectively, forced air cooling effectively controls the cylinder body temperature, preventing the oil-free piston rings 103 from aging rapidly due to high temperatures and extending the service life of the equipment. Overpressure protection is achieved by setting a primary 18-bar safety valve and a secondary 60-bar safety valve, ensuring safe operation of the equipment.The net weight of the entire unit in this embodiment is only 11.5kg, which is far superior to the weight of traditional models of 50kg or more. It realizes the miniaturization and lightweight design of the pressurization equipment 100, which can be directly integrated into a mobile nitrogen generator. It is suitable for scenarios such as nitrogen filling and pressure testing of air conditioning pipelines, pressurization of small pressure vessels, nitrogen protection of molds, and mobile gas supply.

[0050] Furthermore, the aforementioned booster equipment is not only suitable for nitrogen boosting but can also be adapted for boosting other inert gases. When used for argon boosting, the temperature rise during compression is more significant due to the higher density of argon compared to nitrogen. This can be mitigated by increasing fan power, introducing cylinder head liquid cooling, and lengthening the coil of the spiral cooling connecting pipe to enhance heat dissipation and match the increased temperature from the high-density compression of argon. This allows the booster equipment in the above embodiments to be extended into an argon booster. When used for helium boosting, the small diameter and high permeability of helium molecules make leakage easy, particularly at the gaps between the piston rings and cylinder walls and at valve seals. The oil-free piston rings can be replaced with carbon fiber or graphite-filled modified PTFE, and the safety valve gaskets can be replaced with thickened modified fluororubber to reduce leakage of small-molecule helium, allowing the booster equipment to be extended into a helium booster.

[0051] The above are merely exemplary embodiments of this utility model and do not limit the scope of protection of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A pressurization device for pressurizing an inert gas, the inert gas comprising nitrogen, argon, and helium, characterized in that, include: Power components; A frame, on which the power unit is mounted; A crankshaft connecting rod mechanism, comprising a crankshaft body and a first connecting rod and a second connecting rod disposed on the crankshaft body, wherein the rotating shaft of the power component is coaxially connected to the crankshaft body for transmission, and both the first connecting rod and the second connecting rod are sleeved on the crankshaft body; The compression component includes a primary compression cylinder and a secondary compression cylinder, both mounted on the frame and respectively located on both sides of the crankshaft body. The primary compression cylinder has an air inlet, and the secondary compression cylinder has an air outlet. A first connecting rod is drivenly connected to the piston rod of the primary compression cylinder, and a second connecting rod is drivenly connected to the piston rod of the secondary compression cylinder. The primary and secondary compression cylinders are interconnected.

2. The booster device as described in claim 1, characterized in that, The booster device also includes a spiral cooling connecting pipe, through which the primary compression cylinder and the secondary compression cylinder are connected.

3. The booster device as described in claim 2, characterized in that, The booster device further includes a protective cover, a first fixing plate, a second fixing plate, and a locking component. The protective cover is installed on the frame, and the crankshaft connecting rod mechanism is disposed inside the protective cover. The first fixing plate is connected to the protective cover. The first fixing plate forms a first arc-shaped groove, and the second fixing plate forms a second arc-shaped groove. The first fixing plate and the second fixing plate are connected to each other through the locking component. The first arc-shaped groove and the second arc-shaped groove form a mounting position, and the spiral cooling connecting pipe is fixed to the mounting position.

4. The booster device as described in claim 1, characterized in that, The booster device also includes a flexible coupling, through which the rotating shaft of the power component is coaxially connected to the crankshaft body.

5. The booster device as described in claim 1, characterized in that, The inlet is used to receive the inert gas at a pressure of 4.5 bar and a flow rate of 45 L / min to 50 L / min, and the outlet is used to output the inert gas at a pressure greater than or equal to 45 bar.

6. The booster device as described in claim 1, characterized in that, The power component is a permanent magnet synchronous motor with a power of 1500W. The power supply for the permanent magnet synchronous motor is three-phase 220V. The stator winding of the permanent magnet synchronous motor is arranged with 4 poles. The frequency conversion speed regulation range of the permanent magnet synchronous motor is 600rpm to 3000rpm. The insulation class of the permanent magnet synchronous motor is F. The protection class of the permanent magnet synchronous motor is IP54. Alternatively, the power component is a brushless motor.

7. The booster device as described in any one of claims 1 to 6, characterized in that, The crankshaft connecting rod mechanism further includes two self-lubricating bushings and two connecting shafts, wherein one connecting shaft is rotatably sleeved on one of the self-lubricating bushings, and the other connecting shaft is rotatably sleeved on the other self-lubricating bushing. The two self-lubricating bushings are respectively sleeved on the sleeve holes of the first connecting rod and the sleeve holes of the second connecting rod, and the two connecting shafts are respectively connected to the first-stage compression cylinder and the second-stage compression cylinder.

8. The booster device as described in any one of claims 1 to 6, characterized in that, Both the primary compression cylinder and the secondary compression cylinder are equipped with oil-free piston rings.

9. The booster device as described in any one of claims 1 to 6, characterized in that, The booster device also includes multiple heat dissipation fins, which are evenly arranged on the cylinder body of the secondary compression cylinder.

10. The booster device as described in claim 9, characterized in that, The booster device also includes at least four fans, two of which are respectively installed on the top and side of the first-stage compression cylinder; and the other two of which are respectively installed on the top and side of the second-stage compression cylinder.

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