Two-stage compression magnetic suspension air compressor

Abstract

The invention discloses a two-stage compression magnetic suspension air compressor, and relates to the technical field of magnetic suspension air compressors, the two-stage compression magnetic suspension air compressor comprises an equipment shell, and a heat exchanger is fixed on the inner side of the equipment shell. Fan blades are driven to rotate in the movement direction of air flow in a volute, the fan blades drive a mounting rod and a first reciprocating lead screw to rotate through a driving bevel gear and a driven bevel gear, so that one end of a T-shaped hollow connecting strip drives a translation column to move, a hollow column drives a sliding frame to ascend and descend, and a primary filtering layer and a middle filtering layer ascend and descend; the primary filtering layer and the middle filtering layer of the clean part are conveyed to the ventilation opening, when the primary filtering layer and the middle filtering layer ascend and descend, dust falling strips and dust sticking rollers in the dust falling piece can remove dust and cotton fibers on the primary filtering layer and the middle filtering layer, the primary filtering layer and the middle filtering layer are kept in the optimal state when equipment runs, and the equipment can be automatically cleaned in real time without energy consumption. Therefore, sufficient air inflow is ensured, and surge caused by too low air inflow is relieved and prevented fundamentally.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic suspension air compressor, in particular to a two-stage compression magnetic suspension air compressor. BACKGROUND

[0002] The magnetic suspension air compressor is a centrifugal compressor adopting magnetic suspension bearing technology, the rotor is suspended by the magnetic field to assist running, eliminating the friction and lubrication demand caused by the traditional mechanical contact, the traditional air compressor is like an athlete wearing ordinary running shoes running on the runway, the friction exists between the sole and the runway, while the magnetic suspension air compressor is like the athlete being lifted by an invisible magic power (magnetic force) and suspended above the runway, the foot has no contact and friction with the runway, and the "magic" is the magnetic suspension bearing technology, which is the heart of the magnetic suspension air compressor, the magnetic suspension air compressor is composed of a driving and control system, a compression system and a cooling and lubrication system, wherein the main components include magnetic suspension bearing, high-speed permanent magnet synchronous motor, rotor, air inlet filter system and impeller, the high-speed rotating impeller is like a small fan, which sucks air and violently throws it to the edge, the speed of the air is sharply increased, and the high-speed airflow then enters a region called "diffuser", the speed is slowed down, and according to the physical principle, the kinetic energy is converted into pressure energy, so as to realize the compression of the air.

[0003] When the air inlet amount of the traditional magnetic suspension air compressor is too low, the exhaust pressure approaches or exceeds the limit of the compressor, causing the airflow to separate and flow backward, thereby causing surge, and each surge is a great impact on the impeller structure and aerodynamic performance, and long-term or severe surge will directly cause the impeller to be damaged, and the root cause of the low air inlet amount is that the air inlet filter is blocked by dust, flocculation and the like, forming a large air inlet resistance. SUMMARY

[0004] The purpose of the present application is to provide a two-stage compression magnetic suspension air compressor, which solves the problem that the traditional two-stage compression magnetic suspension air compressor causes the airflow to separate and flow backward when the air inlet amount is too low, thereby causing surge, and each surge is a great impact on the impeller structure and aerodynamic performance, and long-term or severe surge will directly cause the impeller to be damaged.

[0005] The present application solves the above technical problems by the following technical scheme, the present application is a two-stage compression magnetic suspension air compressor, characterized by comprising: The equipment shell is internally fixed with a heat exchanger, the top of the heat exchanger is fixed with an air compressor host, the air compressor host comprises a machine shell fixed to the top of the heat exchanger, and the both ends of the machine shell are provided with volutes. The surge damping assembly is arranged on the inner side of the equipment shell, and comprises a wind driving element, a lifting element, a filtering element and a dust discharging element. The wind driving element comprises a mounting strip fixed to the inner side of one of the volute shells and a guide rod frame fixed to the outer surface of the volute shell, a fan blade is rotatably arranged on the top of the mounting strip, a driving bevel gear is rotatably arranged on the bottom of the mounting strip, a mounting rod is rotatably arranged on one side of the guide rod frame, the mounting rod extends to the inner side of the volute shell and is fixed with a driven bevel gear, the driving bevel gear and the driven bevel gear are in meshing connection, and a first reciprocating screw rod is rotatably arranged on the inner side of the guide rod frame.

[0006] Preferably, the filtering element comprises a filtering shell fixed to the inner side of the equipment shell, a vertical groove is arranged on the filtering shell, the lifting element comprises a T-shaped hollow connecting strip screw-connected to the outer side of the first reciprocating screw rod and a sliding block slidingly arranged in the vertical groove, the T-shaped hollow connecting strip slides on the guide rod frame, a translation column slides on the inner side of the T-shaped hollow connecting strip, a hollow column is fixed on the sliding block, one end of the translation column slides in the inner side of the hollow column, and a dust falling element is arranged on the hollow column.

[0007] Preferably, the filtering element further comprises a sealing strip fixed to the inner wall of the filtering shell, and a sliding frame slides on the inner side of the filtering shell, and an initial filter layer and a medium filter layer are fixed on the inner side of the sliding frame.

[0008] Preferably, the dust falling element comprises two toothed plates fixed to one end of the hollow column and two dust falling strips and two dust sticking rollers rotatably arranged on the inner side of the filtering shell, one end of one of the dust falling strips and one end of one of the dust sticking rollers extend to the outer side of the filtering shell and are fixed with gears, the two gears are in meshing connection with the toothed surfaces of the two toothed plates, and a continuous driving element is arranged between one end of the two dust falling strips and between one end of the two dust sticking rollers.

[0009] Preferably, the continuous driving element comprises two toothed plates and a synchronous hole belt arranged between the two toothed plates, the two toothed plates arranged between one end of the two dust falling strips are fixedly connected with one end of the two dust falling strips, and the two toothed plates arranged between one end of the two dust sticking rollers are fixedly connected with one end of the two dust sticking rollers.

[0010] Preferably, the dust discharging element is arranged on the inner side of the filter shell, the dust discharging element is provided with two, the dust discharging element comprises a fixed shell fixed on the inner side of the filter shell and a main gear disc fixed on the gear disc at one end of one of the dust sticking rollers, the inner side of the fixed shell is rotatably provided with a second reciprocating screw rod, one end of the second reciprocating screw rod extends to the outer side of the filter shell and is fixed with a driven gear disc, and the main gear disc and the driven gear disc are engaged.

[0011] Preferably, the dust discharging element further comprises two fixed rods fixed on the inner side wall of the fixed shell and a moving plate threadedly connected to the outer side of the second reciprocating screw rod, and a push plate is rotatably arranged on the moving plate.

[0012] Preferably, two dust outlets are formed in the equipment shell, a magnetic box is slidably arranged on the inner side of the dust outlet, and the air compressor main machine further comprises a permanent magnet synchronous motor arranged on the inner side of the shell and two magnetic suspension bearings, a rotor is arranged between the two magnetic suspension bearings and the permanent magnet synchronous motor, and impellers are fixed on both ends of the rotor.

[0013] Compared with the prior art, the present application has the following beneficial effects: The movement direction of the airflow in the volute drives the rotation of the fan leaf, the fan leaf drives the rotation of the mounting rod and the first reciprocating screw rod through the driving bevel gear and the driven bevel gear, one end of the T-shaped hollow connecting strip drives the movement of the translation column, the hollow column drives the lifting of the sliding frame, the initial filter layer and the middle filter layer are lifted, the initial filter layer and the middle filter layer in the clean area are sent to the ventilation opening, and the dust falling strip and the dust sticking roller in the dust falling element remove the dust and cotton on the initial filter layer and the middle filter layer when the initial filter layer and the middle filter layer are lifted, so that the initial filter layer and the middle filter layer are kept in the best state during the operation of the equipment, the automatic cleaning is realized in real time without energy consumption, and the sufficient air intake is ensured, so that the occurrence of surge caused by too low air intake is fundamentally alleviated and prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the overall structure in the present application; Figure 2 The figure is a schematic diagram of the structure inside the equipment shell in the present application; Figure 3 The figure is a split schematic diagram of the air compressor main machine and the surge alleviating assembly in the present application; Figure 4 The figure is Figure 3 The figure is an enlarged schematic diagram of the middle A part; Figure 5 The figure is Figure 3 The figure is an enlarged schematic diagram of the middle B part; Figure 6 The figure is a sectional view of the filter element in the present application; Figure 7 The figure is a split sectional view of the filter element in the present application; Figure 8 for Figure 7 Enlarged diagram of section C; Figure 9 for Figure 7 Enlarged schematic diagram of section D in the middle.

[0015] 1. Equipment housing; 2. Heat exchanger; 3. Air compressor main unit; 31. Housing; 32. Volute; 33. Permanent magnet synchronous motor; 34. Magnetic levitation bearing; 35. Rotor; 36. Impeller; 4. Anti-surge vibration assembly; 41. Mounting strip; 42. Mounting rod; 43. Fan blade; 44. Driving bevel gear; 45. Driven bevel gear; 46. Guide rod frame; 47. First reciprocating screw; 48. Filter shell; 49. Vertical groove; 410. T-shaped hollow connecting strip; 411. Sliding block; 412. Translation column; 413. Hollow column; 414. Sealing strip; 415. Sliding frame; 416. Primary filter layer; 417. Secondary filter layer; 418. Dust collection strip; 419. Adhesive roller; 420. Toothed plate; 421. Gear; 422. Toothed disc; 423. Synchronous belt; 424. Fixed shell; 425. Main gear disc; 426. Second reciprocating screw; 427. Driven gear disc; 428. Fixed rod; 429. Moving plate; 430. Push plate; 5. Dust outlet. Detailed Implementation

[0016] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0017] This invention provides a technical solution: a two-stage compression magnetic levitation air compressor, such as... Figures 1-9 As shown, the device includes a housing 1 and a damping vibration assembly 4 disposed inside the housing 1. A heat exchanger 2 is fixed inside the housing 1, and an air compressor main unit 3 is fixed on the top of the heat exchanger 2. The air compressor main unit 3 includes a housing 31 fixed on the top of the heat exchanger 2, a permanent magnet synchronous motor 33 disposed inside the housing 31, and two magnetic levitation bearings 34. The magnetic levitation bearings 34 replace the traditional mechanical bearings and suspend the rotor 35 in space by electromagnetic force, achieving zero physical contact and zero friction rotation. Both ends of the housing 31 are provided with volutes 32. The rotor 35 is disposed between the two magnetic levitation bearings 34 and the permanent magnet synchronous motor 33. Both ends of the rotor 35 are fixed with impellers 36. The permanent magnet synchronous motor 33 drives the impellers 36 to rotate at high speed. The impellers 36 are the core working components. The high-speed rotation of the impellers accelerates the air. The compressed air is collected and led to the outlet through the volutes 32. The outlet is disposed on the housing 1 and connected to one of the volutes 32.

[0018] The anti-surge assembly 4 is used to relieve the surge of the impeller 36 caused by the low intake air volume, and comprises a wind driver, a lifting member, a filter and a dust removal member. The wind driver and the lifting member are connected. The wind driver comprises a mounting strip 41 fixed to the inner side of one of the volute casings 32 and a guide rod frame 46 fixed to the outer surface of the volute casing 32. The top of the mounting strip 41 is rotatably provided with a fan blade 43. The bottom of the mounting strip 43 is rotatably provided with a driving bevel gear 44. One side of the guide rod frame 46 is rotatably provided with a mounting rod 42. One end of the mounting rod 42 extends to the inner side of the volute casing 32 and is fixed with a driven bevel gear 45. The driving bevel gear 44 and the driven bevel gear 45 are in meshing connection. The inner side of the guide rod frame 46 is rotatably provided with a first reciprocating screw rod 47. The rotating motion of the fan blade 43 is transmitted to the driven bevel gear 45 through the driving bevel gear 44. Since one end of the first reciprocating screw rod 47 is fixedly connected with one end of the mounting rod 42, the mounting rod 42 and the first reciprocating screw rod 47 are driven to rotate.

[0019] The filter is used to filter the air entering the air compressor main machine 3, filter the dust and particulate matter in the suction air, and protect the precise impeller 36 and the magnetic suspension bearing 34. The filter comprises a filter casing 48 fixed to the inner side of the equipment shell 1 and a sealing strip 414 fixed to the inner wall of the filter casing 48. The volute casing 32 in which the fan blade 43 is installed is connected with the filter casing 48 and the heat exchanger 2 through a connecting pipe. The other volute casing 32 is connected with the air outlet and is connected with the heat exchanger 2 through a connecting pipe. The inner side of the filter casing 48 is slidably provided with a sliding frame 415. The sliding frame 415 is provided with a sealing groove matched with the sealing strip 414. The sealing strip 414 is clamped in the sealing groove to ensure the sealing between the sliding frame 415 and the filter casing 48, so as to avoid the air from penetrating the primary filter layer 416 through the gap between the two. Some sealing rings are also arranged at the opening edge of the sliding frame 415 to increase the overall sealing performance. The inner side of the sliding frame 415 is fixed with a primary filter layer 416 and a middle filter layer 417. The primary filter layer 416 can be a metal mesh, which serves as the first line of defense and mainly intercepts larger particulate matter, flying insects, willow catkins, leaves and other macroscopic impurities. The fibers of this layer are relatively thick, and the air gap is relatively large. The purpose is to prolong the service life of the rear middle filter layer 417. In the environment with a large amount of willow catkins or dust, this layer is the first to be blocked by the naked eye. A layer of fluffy material and dust will cover the surface. At this time, a preliminary intake resistance will be formed. The middle filter layer 417 is usually a synthetic fiber or a composite fiber, which is responsible for capturing small fine dust particles. The filter casing 48 is provided with a vertical groove 49.

[0020] The lifting member comprises a T-shaped hollow connecting strip 410 screwed to the outside of the first reciprocating wire rod 47 and a sliding block 411 sliding in the vertical groove 49, the T-shaped hollow connecting strip 410 slides on the guide rod holder 46 to ensure that the T-shaped hollow connecting strip 410 can move horizontally, the inside of the T-shaped hollow connecting strip 410 slides a translation column 412, the sliding block 411 is fixed with an inclined hollow column 413, one end of the translation column 412 slides in the inside of the hollow column 413, and the hollow column 413 is provided with a falling dust member for discharging dust on the primary filter layer 416 and the medium filter layer 417.

[0021] The falling dust member comprises two toothed plates 420 fixed to one end of the hollow column 413 and two dust falling strips 418 and two dust sticking rollers 419 rotating in the inside of the filter shell 48, a plurality of toothed rakes are arranged at positions corresponding to the dust sticking rollers 419, when the dust sticking rollers 419 rotate through the plurality of toothed rakes, dust and lint on the dust sticking rollers 419 can be scraped off, so as to avoid that the dust sticking rollers 419 are too dirty to affect the cleaning effect of the primary filter layer 416, a maintenance door is arranged at a position corresponding to the plurality of toothed rakes, dust and lint on the plurality of toothed rakes can be taken out by opening the maintenance door in the later period, the dust falling strips 418 rotate to knock the medium filter layer 417 at the corresponding position, so as to knock off the dust attached inside, the dust falls into the fixed shell 424, a ventilation opening is arranged on the equipment shell 1, the ventilation opening is located opposite to the middle of the filter shell 48, the two dust falling strips 418 and the two dust sticking rollers 419 are arranged above and below the ventilation opening respectively, the dust sticking rollers 419 are arranged on one side of the primary filter layer 416, for scraping off dust and lint on the primary filter layer 416, the dust falling strips 418 are arranged on one side of the medium filter layer 417, for knocking off hidden dust in the medium filter layer 417, one end of one of the dust falling strips 418 and one end of one of the dust sticking rollers 419 extend to the outside of the filter shell 48 and are fixed with a gear 421, the two gears 421 are located at the uppermost end of the vertical groove 49, the two gears 421 are engaged with the toothed surfaces of the two toothed plates 420 respectively, and a driving connection member is arranged between one end of the two dust falling strips 418 and one end of the two dust sticking rollers 419, so that the two dust sticking rollers 419 rotate synchronously through the driving connection member, and the two dust falling strips 418 also rotate synchronously.

[0022] The driving connection member comprises two toothed discs 422 and a synchronous hole belt 423 engaged between the two toothed discs 422, the two toothed discs 422 in the driving connection member arranged between one end of the two dust falling strips 418 are fixedly connected with one end of the two dust falling strips 418 respectively, and the two toothed discs 422 in the driving connection member arranged between one end of the two dust sticking rollers 419 are fixedly connected with one end of the two dust sticking rollers 419 respectively.

[0023] The dust discharging member is used for discharging the dust intercepted in the filter member. The dust discharging member is arranged on the inner side of the filter shell 48. Two dust discharging members are arranged, and the two dust discharging members correspond to the heights of the two dust falling strips 418 respectively. The dust discharging member comprises a fixed shell 424 fixed on the inner side of the filter shell 48, two fixed rods 428 fixed on the inner side wall of the fixed shell 424, a moving plate 429 threadedly connected to the outer side of the second reciprocating wire rod 426, and a main tooth disc 425. The fixed shell 424 is arranged between the primary filter layer 416 and the middle filter layer 417. The main tooth disc 425 is fixed on the tooth disc 422 at one end of one of the dust sticking rollers 419. The two main tooth discs 425 in the two dust discharging members are fixed on the tooth discs 422 at one end of the two dust sticking rollers 419 respectively. The second reciprocating wire rod 426 is rotatably arranged on the inner side of the fixed shell 424. One end of the second reciprocating wire rod 426 extends to the outer side of the filter shell 48 and is fixed with a driven tooth disc 427. The main tooth disc 425 and the driven tooth disc 427 are engaged with each other. The moving plate 429 is attached to the inner top wall of the fixed shell 424 at the top, so as to ensure that the moving plate 429 moves flatly. The push plate 430 is rotatably arranged on the moving plate 429. The frictional force between the push plate 430 and the moving plate 429 can be set by itself, and cannot be too small. If the frictional force is too small, the push plate 430 will easily rotate, which will affect the work of pushing out the dust. The discharge holes are arranged at the corresponding positions of the two fixed shells 424. The two dust outlets 5 are arranged on the equipment shell 1. The dust outlets 5 and the discharge holes are connected in communication. The magnetic attraction box is slidably arranged on the inner side of the dust outlet. The magnetic attraction box is provided with a handle buckle, so as to facilitate pulling out the magnetic attraction box from the dust outlet 5.

[0024] In use: the permanent magnet synchronous motor 33 is started, the magnetic suspension bearing 34 is powered, the electromagnetic attraction force generated by the coil makes the rotor 35 stably suspended, the rotor 35 rotates to the set working point, and during operation, the clean air filtered by the primary filter layer 416 and the middle filter layer 417 enters the equipment shell 1, is sucked and compressed by the primary impeller 36, the high-temperature and high-pressure gas discharged after the heat exchanger 2 is cooled again enters the secondary impeller 36 and is compressed again, and after reaching the process gas pressure, is discharged from the air outlet connected with the volute 32 corresponding to the secondary impeller 36.

[0025] When the device is running, the air flow in the volute 32 will drive the fan blade 43 to rotate, the fan blade 43 will drive the driving bevel gear 44 to rotate, the driving bevel gear 44 drives the driven bevel gear 45 to rotate through the meshing teeth, so as to drive the mounting rod 42 and the first reciprocating lead screw 47 fixed at one end of the mounting rod 42 to rotate, the rotation of the first reciprocating lead screw 47 makes the T-shaped hollow connecting strip 410 move straight under the guidance of the guide rod frame 46, when the T-shaped hollow connecting strip 410 moves, it will move relative to the translation column 412, until one end of the T-shaped hollow connecting strip 410 moves to contact the translation column 412, the translation column 412 will be driven by the T-shaped hollow connecting strip 410 to move straight, the translation column 412 will move in the hollow column 413, the hollow column 413 will drive the sliding block 411 to move vertically in the vertical slot 49 under the pushing of the translation column 412, when the T-shaped hollow connecting strip 410 moves away from the volute 32, the sliding block 411 and the hollow column 413 will move downward, on the contrary, when the T-shaped hollow connecting strip 410 moves towards the volute 32, the sliding block 411 and the hollow column 413 will move upward; The downward movement of the hollow column 413 will drive the sliding frame 415 to move downward, so that the primary filter layer 416 and the medium filter layer 417 move downward, the primary filter layer 416 and the medium filter layer 417 in the clean area are pushed downward at the same time, and the hollow column 413 drives the two toothed plates 420 to move downward, the two toothed plates 420 drive the two gears 421 to rotate respectively through the meshing teeth, and the two gears 421 drive one dust sticking roller 419 and one dust falling strip 418 respectively, the dust sticking roller 419 and the dust falling strip 418 will drive the other dust sticking roller 419 and the dust falling strip 418 through the two toothed discs 422 in the driving part and the synchronous hole belt 423, the dust sticking roller 419 will continuously rotate to scrape off the dust and lint on the primary filter layer 416, and after sticking the dust and lint, the dust and lint on the dust sticking roller 419 will be scraped off by the multi-toothed rake, so as to avoid the dirtiness of the dust sticking roller 419 affecting the cleaning effect of the primary filter layer 416, in the later stage, the dust and lint on the multi-toothed rake can be removed by opening the maintenance door, the dust falling strip 418 rotates to knock the medium filter layer 417 in the corresponding position, so as to knock off the dust attached to the inside, and the dust will fall into the fixed shell 424.

[0026] When the two dust falling strips 418 rotate continuously, the main tooth disc 425 drives the slave tooth disc 427 to rotate, and the two second reciprocating lead screws 426 rotate, so that the moving plate 429 moves back and forth along the second reciprocating lead screw 426. When the moving plate 429 drives the push plate 430 to move towards the direction close to the row hole, the dust in the fixed shell 424 is pushed to the row hole and falls into the magnetic attraction box in the dust outlet 5. The magnetic attraction box is regularly extracted from the dust outlet 5 in the later stage. When the moving plate 429 moves to the fixed rod 428 close to the row hole, the push plate 430 is deflected under the forward resistance of the fixed rod 428, so that the push plate 430 is deflected to the bottom and is lifted up, avoiding that the dust is pushed to the deep part of the fixed shell 424 when the moving plate 429 moves back. Until the moving plate 429 and the push plate 430 move to the position away from the row hole along the second reciprocating lead screw 426, the push plate 430 is deflected to the vertical position under the forward resistance of the fixed rod 428, so as to ensure that the bottom of the push plate 430 contacts the bottom of the fixed shell 424 to push the dust.

[0027] The above description is only the preferred embodiment of the present application, which is only illustrative but not limiting. Those skilled in the art understand that many changes, modifications and even equivalents can be made to the present application within the spirit and scope defined by the claims of the present application, and all of them will fall within the protection scope of the present application.

Claims

1. A two-stage compression magnetic levitation air compressor, characterized in that, include: Equipment housing (1), a heat exchanger (2) is fixed inside the equipment housing (1), an air compressor main unit (3) is fixed on the top of the heat exchanger (2), the air compressor main unit (3) includes a housing (31) fixed to the top of the heat exchanger (2), and volutes (32) are provided at both ends of the housing (31). The damping vibration assembly (4) is located inside the equipment housing (1). The damping vibration assembly (4) includes a wind drive component, a lifting component, a filter component, and a dust removal component. The wind drive component and the lifting component are connected. The filter component is used to filter the air entering the air compressor host (3). The dust removal component is used to discharge the dust intercepted in the filter component. The wind drive component includes a mounting strip (41) fixed to the inner side of one of the volutes (32) and a guide rod frame (46) fixed to the outer surface of the volute (32). The top of the mounting strip (41) has a fan blade (43) that rotates, and the bottom of the mounting strip (41) has a driving bevel gear (44) that rotates. One side of the guide rod frame (46) has a mounting rod (42) that rotates. One end of the mounting rod (42) extends to the inner side of the volute (32) and is fixed with a driven bevel gear (45). The driving bevel gear (44) and the driven bevel gear (45) mesh with each other. The inner side of the guide rod frame (46) has a first reciprocating screw (47) that rotates. One end of the first reciprocating screw (47) is fixedly connected to one end of the mounting rod (42).

2. The two-stage compression magnetic levitation air compressor according to claim 1, characterized in that, The filter element includes a filter shell (48) fixed inside the equipment housing (1), and a vertical groove (49) is provided on the filter shell (48). The lifting element includes a T-shaped hollow connecting strip (410) threaded to the outside of the first reciprocating screw (47) and a sliding block (411) sliding inside the vertical groove (49). The T-shaped hollow connecting strip (410) slides on the guide rod frame (46). A translation column (412) slides on the inside of the T-shaped hollow connecting strip (410). A hollow column (413) is fixed on the sliding block (411). One end of the translation column (412) slides on the inside of the hollow column (413). A dust collection element is provided on the hollow column (413).

3. The two-stage compression magnetic levitation air compressor according to claim 2, characterized in that, The filter element also includes a sealing strip (414) fixed to the inner wall of the filter housing (48), and a sliding frame (415) is slidably mounted on the inner side of the filter housing (48). A primary filter layer (416) and a secondary filter layer (417) are fixed on the inner side of the sliding frame (415).

4. The two-stage compression magnetic levitation air compressor according to claim 3, characterized in that, The dust collection component includes two toothed plates (420) fixed to one end of the hollow column (413), two dust collection strips (418) rotating inside the filter shell (48), and two dust sticking rollers (419). One end of one of the dust collection strips (418) and one end of one of the dust sticking rollers (419) extend to the outside of the filter shell (48) and are fixed with gears (421). The two gears (421) mesh with the tooth surfaces of the two toothed plates (420) respectively. A connecting drive is provided between one end of the two dust collection strips (418) and between one end of the two dust sticking rollers (419).

5. The two-stage compression magnetic levitation air compressor according to claim 4, characterized in that, The drive unit includes two toothed discs (422) and a synchronous belt (423) meshing between the two toothed discs (422). The two toothed discs (422) in the drive unit between one end of the two dust collection strips (418) are fixedly connected to one end of the two dust collection strips (418), and the two toothed discs (422) in the drive unit between one end of the two sticky rollers (419) are fixedly connected to one end of the two sticky rollers (419).

6. The two-stage compression magnetic levitation air compressor according to claim 5, characterized in that, The dust removal component is disposed inside the filter housing (48). There are two dust removal components. The dust removal component includes a fixed housing (424) fixed inside the filter housing (48) and a main gear plate (425). The main gear plate (425) is fixed on the toothed plate (422) at one end of one of the dust sticking rollers (419). A second reciprocating screw (426) rotates inside the fixed housing (424). One end of the second reciprocating screw (426) extends to the outside of the filter housing (48) and is fixed with a driven gear plate (427). The main gear plate (425) and the driven gear plate (427) mesh with each other.

7. The two-stage compression magnetic levitation air compressor according to claim 6, characterized in that, The dust removal component also includes two fixed rods (428) fixed to the inner side wall of the fixed shell (424) and a movable plate (429) threaded to the outside of the second reciprocating screw (426), on which a push plate (430) rotates.

8. The two-stage compression magnetic levitation air compressor according to claim 1, characterized in that, The equipment housing (1) has two dust outlets (5), and a magnetic suction box slides inside the dust outlet. The air compressor main unit (3) also includes a permanent magnet synchronous motor (33) and two magnetic levitation bearings (34) disposed inside the housing (31). A rotor (35) is disposed between the two magnetic levitation bearings (34) and the permanent magnet synchronous motor (33). Impellers (36) are fixed at both ends of the rotor (35).

Images