A differential air compressor

Abstract

The present invention provides a slip-type air compressor, which relates to the technical field of air compressors. This slip-type air compressor includes a support base, a drive unit, a drive shaft, an inner rotor unit, an outer rotor unit, a gear, a gear ring and a ventilation unit. The slip-type air compressor of the present invention has low manufacturing precision and low cost; there is no change in the center of mass, small vibration and low noise; high compression efficiency, and higher compression efficiency can be achieved at a lower speed. While achieving the same compression efficiency, the speed can be reduced, and the speed is reduced to further reduce vibration. Among them, taking the first polygon as a quadrilateral and the second polygon as a pentagon as an example, the motor has four intakes and compressions and exhausts for every rotation of the motor. Under the condition of the same volume, compared with the two-cylinder piston compressor on the market (the motor has two intakes and compressions and exhausts for every rotation of the motor), this can reduce the speed, reduce the speed of the motor, and reduce vibration and noise accordingly.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors, in particular to a slip-type air compressor. Background Art

[0002] Air compressors are commonly used in industrial and mining enterprises. They convert mechanical energy into gas pressure energy through prime mover operation, which is then used to drive various pneumatic equipment. Air compressors generate considerable noise during operation. To effectively reduce this noise, noise transmission is typically controlled through noise reduction, such as through sound absorption, sound insulation, and sound absorption. However, reducing vibration within the air compressor itself can fundamentally address this noise issue.

[0003] At present, most air compressors have changes in center of mass. For example, piston air compressors compress air through the reciprocating motion of the piston. The center of mass of the piston is reciprocating. No matter how balanced it is, it will produce vibration, and vibration will inevitably cause noise. Among them, only screw air compressors do not have changes in center of mass during operation. However, screw air compressors have high processing precision requirements and are also expensive. Summary of the Invention

[0004] The object of the present invention is to provide a slip-type air compressor to reduce vibration during operation of the air compressor and thereby reduce noise generation.

[0005] In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0006] A slip-type air compressor comprises a support base, a drive unit, a drive shaft, an inner rotor unit, an outer rotor unit, a gear, a gear ring and a ventilation unit;

[0007] The driving unit is provided on the support seat, and the driving unit is used to drive the driving shaft to rotate, and the driving shaft is rotatably connected to the support seat via a bearing;

[0008] The inner rotor unit comprises an inner rotor, a sliding vane, a first elastomer, a rotor end face sealing assembly and a sealing sleeve, wherein the cross section of the outer contour of the inner rotor is a first polygon with central symmetry, each corner of the first polygon extends radially outward, a sliding vane slot is provided on the side surface of the inner rotor at the end of each corner, the sliding vane slot extends radially along the inner rotor, the inner end of the sliding vane is slidably connected to the sliding vane slot, the first elastomer is provided between the inner end of the sliding vane and the bottom of the sliding vane slot, the rotor end face sealing assembly is provided on both end surfaces of the inner rotor, a first assembly hole is provided in the central position of the inner rotor along the axial direction, a first vent hole connected to the first assembly hole is provided on the side surface of the inner rotor at a position between two corners, the first vent holes on adjacent sides of the inner rotor are staggered at one end of the first assembly hole, the sealing sleeve is fitted in the first assembly hole, a second vent hole is provided on the side surface of the sealing sleeve, and the second vent hole matches the first vent hole at one end of the first assembly hole in position and size;

[0009] The outer rotor unit includes an outer rotor, a first bearing seat, and a second bearing seat. The cross-section of the inner cavity of the outer rotor is a second polygon with one more angle than the first polygon and is centrally symmetrical. Each angle of the second polygon extends radially outward. The first bearing seat and the second bearing seat are respectively provided at the left and right ends of the outer rotor. The first bearing seat and the second bearing seat are both rotatably connected to the support seat via bearings.

[0010] The inner rotor unit and the gear are assembled at the end of the drive shaft, and the ring gear is assembled on the first bearing seat or the second bearing seat. The inner rotor unit is located in the inner cavity of the outer rotor, and the rotation axis of the inner rotor unit is eccentrically arranged with respect to the rotation axis of the outer rotor unit. The sliding vane can contact the circumferential side wall of the inner cavity of the outer rotor, and the rotor end face seal assembly contacts the end face side wall of the inner cavity of the outer rotor. The inner rotor unit divides the inner cavity of the outer rotor into air chamber spaces with the same number of first polygon angles. The gear meshes with the ring gear, and the transmission ratio of the gear to the ring gear is equal to the ratio of the first polygon angle number to the second polygon angle number.

[0011] The ventilation unit includes a ventilation seat and an exhaust valve plate, one side of the ventilation seat is a columnar body, the columnar body is provided with an air inlet arc groove matching all the second ventilation holes along the circumference, the columnar body is provided with a plurality of exhaust arc grooves matching the second ventilation holes respectively along the circumference, an air inlet channel is provided inside the columnar body along the axial direction, one end of the air inlet channel is connected to the air inlet arc groove, and the other end of the air inlet channel is connected to the end face of the ventilation seat, an exhaust channel is provided inside the columnar body along the axial direction, one end of the exhaust channel is connected to the exhaust arc groove, and the other end of the exhaust channel is connected to the end face of the ventilation seat, the exhaust valve plate is provided on the end face of the ventilation seat, and the exhaust valve plate covers the other end of the exhaust channel;

[0012] The ventilation unit is assembled on the support seat, and the columnar body of the ventilation seat passes through the first bearing seat or the second bearing seat, and the columnar body of the ventilation seat is located in the sealing sleeve; during the rotation of the sealing sleeve relative to the columnar body of the ventilation seat, the second ventilation hole dynamically matches the intake arc groove and the exhaust arc groove selectively.

[0013] Preferably, the support seat includes a left support seat and a right support seat, the drive unit is assembled between the left support seat and the right support seat, and the drive shaft is rotatably connected to the left support seat and the right support seat via bearings.

[0014] Preferably, the support seat further includes an end cover, which is assembled on the left end of the left support seat, and a bearing that cooperates with the first bearing seat is provided on the end cover.

[0015] Preferably, the end cover is provided with a second assembly hole, the columnar body of the vent seat passes through the second assembly hole and the first bearing seat in sequence, and the end face of the vent seat is located on the outside of the end cover.

[0016] Preferably, it also includes a vent cover, the vent cover is provided with a vent nozzle, the vent nozzle is provided with an air inlet interface and an exhaust interface, the vent cover is assembled with the end cover, the vent cover is sealedly connected to the end cover, the end face of the vent seat is sealedly connected to the outer side of the end cover, a closed chamber is formed between the vent cover, the vent seat and the end cover, the air inlet interface is connected to the other end of the air inlet duct, and the exhaust interface is connected to the closed chamber.

[0017] Preferably, the rotor end face sealing assembly includes a second elastomer and a sealing ring, a first sealing notch is provided at the edge positions of the end faces on both sides of the inner rotor, and a second sealing notch is provided at the end faces on both sides of the sliding vane, the first sealing notch and the second sealing notch are spliced into an annular sealing notch, the second elastomer and the sealing ring are sequentially assembled in the annular sealing notch from the inside to the outside, and the sealing ring contacts the end face side wall of the inner cavity of the outer rotor.

[0018] Preferably, it also includes a connecting sleeve, a gasket and a screw, the connecting sleeve is assembled in the first assembly hole, the inner wall of the connecting sleeve is provided with a step, the gasket is located on the step, a threaded hole is opened at the end of the drive shaft, and the screw assembles the gasket and the threaded hole in sequence.

[0019] Preferably, the columnar body of the vent seat is provided with an air inlet arc groove and a plurality of air exhaust arc grooves within a set width along the axial direction, wherein the plurality of air exhaust arc grooves are arranged in parallel.

[0020] Preferably, the inner wall of the first assembly hole is provided with a plurality of limiting grooves, and the circumferential outer wall of the sealing sleeve is provided with a plurality of limiting protrusions, and the limiting protrusions cooperate with the limiting grooves.

[0021] Preferably, the driving unit is configured as an electric motor, and the driving shaft is configured as an output shaft of the electric motor.

[0022] The beneficial technical effects of the present invention are:

[0023] The slip-type air compressor of the present invention has low manufacturing precision and low cost; there is no change in the center of mass, small vibration and low noise; high compression efficiency, and higher compression efficiency can be achieved at a lower rotational speed. The rotational speed can be reduced while achieving the same compression efficiency, and the reduced rotational speed can further reduce vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a slip-type air compressor according to an embodiment of the present invention. Figure 1 Partial dissection was performed on the lower middle right side;

[0025] Figure 2 An axial cross-sectional view of a slip-type air compressor according to an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Middle AA section view;

[0027] Figure 4 for Figure 2 Middle BB cross-section;

[0028] Figure 5 for Figure 3 A partial enlarged view of point C in the middle;

[0029] Figure 6 This is a front view of the inner rotor unit according to an embodiment of the present invention;

[0030] Figure 7 for Figure 6 Middle DD section view;

[0031] Figure 8 This is a three-dimensional perspective view of the inner rotor of an embodiment of the present invention. Figure 8 Partial dissection was performed on the upper middle left side;

[0032] Figure 9 A three-dimensional perspective view of a sealing sleeve according to an embodiment of the present invention;

[0033] Figure 10 is a three-dimensional diagram of an outer rotor unit according to an embodiment of the present invention;

[0034] Figure 11 is an axial cross-sectional view of an outer rotor unit according to an embodiment of the present invention;

[0035] Figure 12 This is a diagram showing the coordination of the outer rotor and inner rotor units at a certain moment in an embodiment of the present invention;

[0036] Figure 13 The three-dimensional structure of the ventilation unit according to the embodiment of the present invention Figure 1 ;

[0037] Figure 14 for Figure 13 Middle EE cross-sectional view;

[0038] Figure 15 The three-dimensional structure of the ventilation unit according to the embodiment of the present invention Figure 2 ;

[0039] Figure 16 for Figure 15 Middle FF cross-sectional view;

[0040] Figure 17 This is a schematic diagram of the suction and compression cycles during the operation of a slip-type air compressor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and beneficial effects of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be more fully described below with reference to the accompanying drawings, some, but not all, of which are illustrated. The various embodiments of the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention satisfies applicable legal requirements.

[0042] In the description of the present invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In an embodiment of the present invention, a differential air compressor is provided. Figures 1 to 16 shown.

[0044] A slip-type air compressor includes a support base (a left support base 11 and a right support base 12), a drive unit, a drive shaft, an inner rotor unit 20, an outer rotor unit 30, a gear 41, a ring gear 42 and a ventilation unit 50.

[0045] A driving unit is provided on the support seat, and the driving unit is used to drive the driving shaft to rotate, and the driving shaft is rotatably connected to the support seat via the bearing 6.

[0046] Specifically, the support base includes a left support base 11 and a right support base 12. The drive unit is configured as an electric motor, comprising a stator 71 and a rotor 72. The drive shaft is configured as an output shaft 73 integrally assembled with the motor rotor 72. The motor stator 71 is mounted between the left support base 11 and the right support base 12. The output shaft 73 is rotatably connected to the left support base 11 and the right support base 12 via bearings 6. A fan 74 is provided at the right end of the output shaft 73. Rotation of the output shaft 73 drives the fan 74 to dissipate heat from the motor.

[0047] The inner rotor unit 20 includes an inner rotor 21, a vane 22, a first elastic body 23, a rotor end face seal assembly, and a sealing sleeve 24. The cross-section of the outer contour of the inner rotor 21 is a first polygonal shape. The first polygon is centrally symmetrical, and each corner of the first polygon extends radially outward. In this embodiment, the first polygon is a quadrilateral.

[0048] The side of the inner rotor 21 is provided with a vane slot 211 at the end of each corner. The vane slot 211 extends radially along the inner rotor 21. The inner end of the vane 22 is slidably connected to the vane slot 211. A first elastic body 23 is disposed between the inner end of the vane 22 and the bottom of the vane slot 211. The first elastic body 23 is made of an elastic or flexible material. Under the elastic action of the first elastic body 23, the vane 22 can move slightly radially along the vane slot 211, so that the vane 22 maintains dynamic contact with the circumferential sidewall of the outer rotor's inner cavity.

[0049] The inner rotor 21 is equipped with a rotor end face seal assembly, comprising a second elastic body 25 and a sealing ring 26. First sealing notches 212 are defined along the edges of the inner rotor 21's end faces, while second sealing notches 221 are defined along the ends of the vanes 22. These first and second sealing notches 212 and 221 form an annular sealing notch. The second elastic body 25 and sealing ring 26 are sequentially assembled within the annular sealing notch, from the inside out. The sealing ring 26 contacts the end face wall of the outer rotor's inner cavity. The second elastic body 25 and sealing ring 26 are made of an elastic or flexible material. Under the elastic action of the second elastic body 25 and the sealing ring 26, they can slightly expand and contract with the slight movement of the vanes 22, ensuring dynamic contact between the sealing ring 26 and the end face wall of the outer rotor's inner cavity.

[0050] A first mounting hole 213 is defined axially at the center of the inner rotor 21. First vent holes 214, communicating with the first mounting hole 213, are defined on the side surfaces of the inner rotor 21, located midway between two corners. The first vent holes 214 on adjacent sides of the inner rotor 21 are staggered, positioned at one end of the first mounting hole 213. In this embodiment, the preferred arrangement of "first vent holes 214 on adjacent sides of the inner rotor 21 are staggered, positioned at one end of the first mounting hole 213" is that the first vent holes 214 on adjacent sides of the inner rotor 21 are not located on the same plane perpendicular to the axis of the first mounting hole 213. This allows adjacent air chambers to be exhausted through their respective first vent holes 214 during compression and exhaust.

[0051] The sealing sleeve 24 is assembled at one end in the first assembly hole 213 . A second vent hole 241 is defined on the side of the sealing sleeve 24 . The second vent hole 241 matches the first vent hole 214 at one end of the first assembly hole 213 and has the same size.

[0052] The inner wall of the first assembly hole 213 is provided with four limiting grooves 215 at equal intervals, and the circumferential outer wall of the sealing sleeve 24 is provided with four limiting protrusions 242 at equal intervals. The limiting protrusions 242 engage with the limiting grooves 215 to limit the circumferential rotation of the sealing sleeve 24 relative to the first assembly hole 213.

[0053] The outer rotor unit 30 includes an outer rotor 31, a first bearing seat 32, and a second bearing seat 33. The cross-section of the inner cavity of the outer rotor 31 is a second polygon. The second polygon has one more corner than the first polygon and is centrally symmetrical, with each corner of the second polygon extending radially outward. In this embodiment, the second polygon is configured as a pentagon. The first and second bearing seats 32, 33 are respectively provided at the left and right ends of the outer rotor 31. The first and second bearing seats 32, 33 are both rotatably connected to the left and right ends of the left support seat 11 via bearings 6. The left end of the left support seat 11 is assembled with an end cap 13, and the inner end surface of the end cap 13 is provided with a bearing 6 that mates with the first bearing seat 32.

[0054] The inner rotor unit 20 and the gear 41 are mounted on the distal end of the drive shaft (output shaft 73 ).

[0055] Specifically, the connecting sleeve 27 is assembled into the other end of the first assembly hole 213. The inner wall of the connecting sleeve 27 is provided with a step 271, and the end of the drive shaft is provided with a threaded hole 731. During assembly, the output shaft 73 is first passed through the assembly hole of the gear 41 to assemble the gear 41 onto the output shaft 73. The right end of the gear 41 abuts against the inner ring end face of the bearing 6 of the left support seat 11, which is rotatably engaged with the output shaft 73. The right end of the connecting sleeve 27 is then abutted against the left end of the gear 41. The washer 28 is placed on the step 271. The screw 29 is inserted into the connecting sleeve 27 from one end of the first assembly hole 213. The screw head of the screw 29 presses against the washer 28, and the end of the screw 29 is threadedly connected to the threaded hole 731.

[0056] The ring gear 42 is mounted on the first bearing seat 32 or the second bearing seat 33 .

[0057] Specifically, in this embodiment, the outer rotor 31, the first bearing seat 32, and the second bearing seat 33 are split structures. The left end of the outer rotor 31 is assembled and connected to the first bearing seat 32. A left sealing groove 311 is defined at the left end of the outer rotor 31. A left sealing ring 341 is installed in the left sealing groove 311. The left sealing ring 341 is used to seal between the left end of the outer rotor 31 and the first bearing seat 32. A through hole is defined in the middle of the first bearing seat 32 to facilitate the passage of the columnar body of the vent seat 51 through the first bearing seat 32.

[0058] The right end of the outer rotor 31 is assembled and connected to the sealing disk 35. A right sealing groove 312 is defined at the right end of the outer rotor 31. A right sealing ring 342 is installed in the right sealing groove 312. The right sealing ring 342 is used to achieve a seal between the right end of the outer rotor 31 and the sealing disk 35. A ring gear 42 is installed between the sealing disk 35 and the second bearing seat 33.

[0059] A through hole is provided in the middle of the sealing disk 35 and the second bearing seat 33 to facilitate the driving shaft (output shaft 73 ) to pass through the sealing disk 35 and the second bearing seat 33 .

[0060] The inner rotor unit 20 is located within the inner cavity of the outer rotor 31. The rotation axis W1 of the inner rotor unit 20 is eccentrically arranged with respect to the rotation axis W2 of the outer rotor unit 30, with an eccentric distance L. The vanes 22 can contact the circumferential sidewalls of the inner cavity of the outer rotor 31, and the rotor end face seal assembly contacts the end face sidewalls of the inner cavity of the outer rotor 31. The inner rotor unit 20 divides the inner cavity of the outer rotor 31 into four air chambers, the same number as the first polygonal angle. Specifically, the end face sidewalls of the inner cavity of the outer rotor 31 are the inner end face sidewalls of the first bearing seat 32 and the inner end face sidewalls of the sealing disk 35. The gear 41 engages with the ring gear 42, and the transmission ratio between the gear 41 and the ring gear 42 is equal to the ratio of the first polygonal angle to the second polygonal angle. In this way, when the gear 41 drives the ring gear 42 to rotate, the inner rotor 21 and the outer rotor 31 also rotate in the same proportion.

[0061] The ventilation unit 50 includes a vent seat 51 and an exhaust valve plate 52. One side of the vent seat 51 is cylindrical. The cylinder has an inlet arcuate slot 511 circumferentially aligned with all second vent holes 241. The cylinder also has two exhaust arcuate slots 512 circumferentially aligned with each second vent hole 241. In this embodiment, the cylinder of the vent seat 51 is arranged with one inlet arcuate slot 511 and two exhaust arcuate slots 512 within a predetermined axial width. The two exhaust arcuate slots 512 are arranged in parallel. Because the first vent holes 214 on the adjacent side of the inner rotor 21 are staggered at one end of the first assembly hole 213, this also results in a staggered arrangement of the second vent holes 241 on the adjacent side of the sealing sleeve 24. In this embodiment, the second vent holes 241 on the adjacent side of the sealing sleeve 24 are staggered in two planes perpendicular to the axis of the first assembly hole 213. In this way, each arcuate exhaust groove 512 is matched with a second vent hole 241 on a different plane perpendicular to the axis of the first assembly hole 213. In this embodiment, one arcuate exhaust groove 512 is matched with two second vent holes 241 on one plane perpendicular to the axis of the first assembly hole 213, and another arcuate exhaust groove 512 is matched with two second vent holes 241 on another plane perpendicular to the axis of the first assembly hole 213.

[0062] An air inlet channel 513 is provided inside the column along the axial direction. One end of the air inlet channel 513 is connected to the air inlet arc groove 511, and the other end of the air inlet channel 513 is connected to the end face of the vent seat 51. An exhaust channel 514 is provided inside the column along the axial direction. One end of the exhaust channel 514 is connected to the exhaust arc groove 512, and the other end of the exhaust channel 514 is connected to the end face of the vent seat 51. The end face of the vent seat 51 is assembled with one end of the exhaust valve plate 52, and the exhaust valve plate 52 covers the other end of the exhaust channel 514. The exhaust valve plate 52 is an elastic body, and the air flow is along Figure 14 、 Figure 16 The flow is in the direction of the arrows at Q1 and Q2.

[0063] The ventilation unit 50 is assembled on the end cover 13, which is fixedly connected to the left support seat 11. The columnar body of the ventilation seat 51 passes through the through hole in the center of the first bearing seat and is located within the sealing sleeve 24. During the rotation of the sealing sleeve 24 relative to the columnar body of the ventilation seat 51, the second ventilation hole 241 dynamically matches the intake arc groove 511 and the exhaust arc groove 512.

[0064] A second assembly hole is provided in the middle of the end cap 13, and the columnar body of the vent seat 51 passes through the second assembly hole and the through hole of the first bearing seat 32 in sequence, with the end surface of the vent seat 51 located outside the end cap 13. This facilitates the connection of the vent seat 51 to the intake and exhaust system.

[0065] The vent cover 53 is provided with a vent nozzle 531, which is provided with an air inlet port 5311 and an air outlet port 5312. The vent cover 53 is assembled with the end cover 13, and the vent cover 53 and the end cover 13 are sealed together via a sealing ring. The end surface of the vent seat 51 is sealed together with the outer side of the end cover 13 via a sealing ring, forming a closed chamber between the vent cover 53, the vent seat 51, and the end cover 13. The air inlet port 5311 is connected to the other end of the air inlet channel 513, and a sealing ring is provided between the air inlet port 5311 and the other end of the air inlet channel 513. The air outlet port 5312 is connected to the closed chamber. This facilitates connection to the intake and exhaust system through the vent nozzle 531.

[0066] like Figure 12 As shown, when the inner rotor unit 20 and outer rotor 31 rotate in the direction W3 at a certain moment, the eccentric distance L between the inner rotor unit 20 and the outer rotor 31 divides the space between them into four air chambers: M1, M2, M3, and M4. The four edges of the inner rotor unit 20 are at positions N1, N2, N3, and N4, respectively. At this point, the M3 air chamber has its largest space, while the M1 air chamber has its smallest space. As the inner rotor unit 20 continues to rotate in the W3 direction, the M3 air chamber gradually decreases, entering a compression state, while the M1 air chamber gradually increases, entering an intake state.

[0067] The first vent hole 214 on the N1 side of the inner rotor unit 20 (connected to the second vent hole 241 of the sealing sleeve 24) enters an intake state as its volume increases; the first vent hole 214 on the N3 side of the inner rotor unit 20 (connected to the second vent hole 241 of the sealing sleeve 24) enters a compression state as its volume decreases. Accordingly, the first vent hole 214 on the N1 side communicates with the arcuate intake groove 511 and intake duct 513 of the vent ring 51, drawing air in through the intake port 5311 of the vent nozzle 531 of the vent cover 53. The first vent hole 214 on the N3 side communicates with an exhaust arcuate groove 512 and exhaust duct 514 of the vent ring 51, exhausting air through the exhaust valve plate 52 within the closed chamber and the exhaust port 5312 of the vent nozzle 531 of the vent cover 53. At this time, the N2 side of the inner rotor unit 20 is also in an air intake state, and the first vent hole 214 on the N1 side (connected to the second vent hole 241 of the sealing sleeve 24) is connected to the air intake arc groove 511 and the air intake channel 513 of the vent ring 51, and air is inhaled through the air intake interface 5311 of the vent nozzle 531 of the vent cover 21; the N4 side of the inner rotor unit 20 is also in a compressed air state, and the first vent hole 214 on the N4 side (connected to the second vent hole 241 of the sealing sleeve 24) is connected to another exhaust arc groove 512 and the exhaust channel 514 of the vent ring 51, and exhaust is exhausted through the exhaust valve plate 52 in the closed chamber and the exhaust interface 5312 of the vent nozzle 531 of the vent cover 53. This cycle forms a continuous compressed gas, as shown in FIG. Figure 17 shown.

[0068] Thus far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the slip-type air compressor of the present invention. The slip-type air compressor of the present invention has low manufacturing precision and low cost; no center of mass change, low vibration, and low noise; high compression efficiency, and can achieve higher compression efficiency at a lower speed. While achieving the same compression efficiency, the speed can be reduced, and the reduced speed further reduces vibration. For example, in this embodiment, where the first polygon is set as a quadrilateral and the second polygon is set as a pentagon, the motor has four intakes and four compressions for each revolution. Given the same volume, this can reduce the speed compared to commercially available two-cylinder piston compressors (which have two intakes and two compressions per motor revolution). For example, a two-cylinder piston compressor with a speed of 1350 rpm can reduce the speed of the slip-type air compressor of the present invention to approximately 700 rpm. As the motor speed decreases, vibration and noise are reduced.

[0069] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slip air compressor, characterized in that: It includes a support base, a drive unit, a drive shaft, an inner rotor unit, an outer rotor unit, a gear, a gear ring and a ventilation unit; The driving unit is provided on the support seat, and the driving unit is used to drive the driving shaft to rotate, and the driving shaft is rotatably connected to the support seat via a bearing; The inner rotor unit comprises an inner rotor, a sliding vane, a first elastomer, a rotor end face sealing assembly and a sealing sleeve, wherein the cross section of the outer contour of the inner rotor is a first polygon with central symmetry, each corner of the first polygon extends radially outward, a sliding vane slot is provided on the side surface of the inner rotor at the end of each corner, the sliding vane slot extends radially along the inner rotor, the inner end of the sliding vane is slidably connected to the sliding vane slot, the first elastomer is provided between the inner end of the sliding vane and the bottom of the sliding vane slot, the rotor end face sealing assembly is provided on both end surfaces of the inner rotor, a first assembly hole is provided in the central position of the inner rotor along the axial direction, a first vent hole connected to the first assembly hole is provided on the side surface of the inner rotor at a position between two corners, the first vent holes on adjacent sides of the inner rotor are staggered at one end of the first assembly hole, the sealing sleeve is fitted in the first assembly hole, a second vent hole is provided on the side surface of the sealing sleeve, and the second vent hole matches the first vent hole at one end of the first assembly hole in position and size; The outer rotor unit includes an outer rotor, a first bearing seat, and a second bearing seat. The cross-section of the inner cavity of the outer rotor is a second polygon with one more angle than the first polygon and is centrally symmetrical. Each angle of the second polygon extends radially outward. The first bearing seat and the second bearing seat are respectively provided at the left and right ends of the outer rotor. The first bearing seat and the second bearing seat are both rotatably connected to the support seat via bearings. The inner rotor unit and the gear are assembled at the end of the drive shaft, and the ring gear is assembled on the first bearing seat or the second bearing seat. The inner rotor unit is located in the inner cavity of the outer rotor, and the rotation axis of the inner rotor unit is eccentrically arranged with respect to the rotation axis of the outer rotor unit. The sliding vane can contact the circumferential side wall of the inner cavity of the outer rotor, and the rotor end face seal assembly contacts the end face side wall of the inner cavity of the outer rotor. The inner rotor unit divides the inner cavity of the outer rotor into air chamber spaces with the same number of first polygon angles. The gear meshes with the ring gear, and the transmission ratio of the gear to the ring gear is equal to the ratio of the first polygon angle number to the second polygon angle number. The ventilation unit includes a ventilation seat and an exhaust valve plate, one side of the ventilation seat is a columnar body, the columnar body is provided with an air inlet arc groove matching all the second ventilation holes along the circumference, the columnar body is provided with a plurality of exhaust arc grooves matching the second ventilation holes respectively along the circumference, an air inlet channel is provided inside the columnar body along the axial direction, one end of the air inlet channel is connected to the air inlet arc groove, and the other end of the air inlet channel is connected to the end face of the ventilation seat, an exhaust channel is provided inside the columnar body along the axial direction, one end of the exhaust channel is connected to the exhaust arc groove, and the other end of the exhaust channel is connected to the end face of the ventilation seat, the exhaust valve plate is provided on the end face of the ventilation seat, and the exhaust valve plate covers the other end of the exhaust channel; The ventilation unit is assembled on the support seat, and the columnar body of the ventilation seat passes through the first bearing seat or the second bearing seat, and the columnar body of the ventilation seat is located in the sealing sleeve; during the rotation of the sealing sleeve relative to the columnar body of the ventilation seat, the second ventilation hole dynamically matches the intake arc groove and the exhaust arc groove selectively.

2. A slip-type air compressor according to claim 1, characterized in that: The support base includes a left support base and a right support base, the drive unit is assembled between the left support base and the right support base, and the drive shaft is rotatably connected to the left support base and the right support base via bearings.

3. A slip-type air compressor according to claim 2, characterized in that: The support seat also includes an end cover, which is assembled on the left end of the left support seat, and a bearing that cooperates with the first bearing seat is provided on the end cover.

4. A slip-type air compressor according to claim 3, characterized in that: The end cover is provided with a second assembly hole, the columnar body of the vent seat passes through the second assembly hole and the first bearing seat in sequence, and the end surface of the vent seat is located on the outer side of the end cover.

5. The slip-type air compressor according to claim 4, characterized in that: It also includes a vent cover, which is provided with a vent nozzle, and the vent nozzle is provided with an air inlet interface and an exhaust interface, the vent cover is assembled with the end cover, the vent cover is sealedly connected to the end cover, the end face of the vent seat is sealedly connected to the outer side of the end cover, and a closed chamber is formed between the vent cover, the vent seat and the end cover, the air inlet interface is connected to the other end of the air inlet duct, and the exhaust interface is connected to the closed chamber.

6. The slip-type air compressor according to claim 1, characterized in that: The rotor end face sealing assembly includes a second elastomer and a sealing ring. A first sealing notch is provided at the edge positions of the end faces on both sides of the inner rotor, and a second sealing notch is provided at the end faces on both sides of the sliding vane. The first sealing notch and the second sealing notch are spliced into an annular sealing notch. The second elastomer and the sealing ring are sequentially assembled in the annular sealing notch from the inside to the outside, and the sealing ring contacts the end face side wall of the inner cavity of the outer rotor.

7. The slip-type air compressor according to claim 1, characterized in that: It also includes a connecting sleeve, a gasket and a screw. The connecting sleeve is assembled in the first assembly hole. The inner wall of the connecting sleeve is provided with a step. The gasket is located on the step. A threaded hole is provided at the end of the drive shaft. The screw assembles the gasket and the threaded hole in sequence.

8. The slip-type air compressor according to claim 1, characterized in that: An air inlet arc groove and a plurality of exhaust arc grooves are arranged in an axially set width of the columnar body of the vent seat, wherein the plurality of exhaust arc grooves are arranged in parallel.

9. The slip-type air compressor according to claim 1, characterized in that: The inner wall of the first assembly hole is provided with a plurality of limiting grooves, and the circumferential outer wall of the sealing sleeve is provided with a plurality of limiting protrusions, and the limiting protrusions are matched with the limiting grooves.

10. The slip-type air compressor according to claim 1, characterized in that: The driving unit is configured as an electric motor, and the driving shaft is configured as an output shaft of the electric motor.

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