Floating oil-free vacuum scroll compressor

Abstract

A floating oil-free vacuum scroll compressor, comprising a motor main body (1), a compression end (2), a vacuum end (3) and a connector (4), the compression end (2) and the vacuum end (3) being respectively fitted at two ends of the motor main body (1). Floating wear rings (5) are fitted between a first compression orbiting scroll (23) and a second compression orbiting scroll (24) and between a first vacuum orbiting scroll (33) and a second vacuum orbiting scroll (34). A circular spring (9) is fitted inside each floating wear ring (5). In the floating oil-free vacuum scroll compressor, both sides of the motor main body (1) are each provided with two sets of orbiting scrolls and fixed scrolls, so as to increase the air vacuum and compressed air volume under a same size, and multi-stage sealing is formed, thus prolonging the service life of the entire machine and improving working efficiency; and the orbiting scrolls, the fixed scrolls and the floating wear rings are all made of a material consisting of PEEK blended with carbon fiber powder and polytetrafluoroethylene, such that the orbiting scrolls are in a slight planar sealing state during operation and has the characteristic of self-lubricating, allowing the orbiting scrolls to have a certain range of clearance, thus improving the yield of assembly while reducing the assembly requirements and difficulty.

Description

Floating oil-free vacuum scroll compressor Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular provides a floating oil-free vacuum scroll compressor. Background Art

[0002] For scroll compressors, in the existing technology, the scroll is formed by the structural cooperation of a fixed plate and a movable plate. During assembly, due to the constraints of the scroll structure characteristics, the meshing material is usually selected from metal materials, and corresponding scroll matching is required. Generally, polytetrafluoroethylene sealing strips are used to seal the contact surface between the movable plate and the fixed plate. However, after the seal is slightly worn, effective compression cannot be formed.

[0003] The existing technology uses a positioning installation method. The fixed plate and the movable plate must meet the assembly requirements of the specified gap to ensure the sealing during the meshing process. However, due to the great difficulty of assembly, the yield rate is extremely low.

[0004] In addition, existing scroll compressors are generally only provided with one set of fixed plates and rotating plates, which limits their efficiency in compressing air.

[0005] Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a floating oil-free vacuum scroll compressor.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a floating oil-free vacuum scroll compressor, including a motor body, a compression end, a vacuum end and a joint, wherein the compression end and the vacuum end are respectively assembled at both ends of the motor body.

[0008] The compression end includes a first compression scroll fixed plate, a second compression scroll fixed plate, a first compression scroll movable plate and a second compression scroll movable plate. The first compression scroll movable plate and the second compression scroll movable plate are located inside the first compression scroll fixed plate and the second compression scroll fixed plate, and the first compression scroll movable plate and the second compression scroll movable plate are assembled at one side output end of the motor body.

[0009] The vacuum end includes a first vacuum scroll fixed plate, a second vacuum scroll fixed plate, a first vacuum scroll movable plate and a second vacuum scroll movable plate. The first vacuum scroll movable plate and the second vacuum scroll movable plate are located inside the first vacuum scroll fixed plate and the second vacuum scroll fixed plate, and the first vacuum scroll movable plate and the second vacuum scroll movable plate are assembled at the output end on the other side of the motor body.

[0010] A floating wear-resistant ring is installed between the first compression scroll and the second compression scroll, and between the first vacuum scroll and the second vacuum scroll. A coil spring is installed inside the floating wear-resistant ring.

[0011] The output ends on both sides of the motor body are integrally formed with an eccentrically arranged square shaft, the outer walls of the square shafts are sleeved with an eccentric inner ring of the shaft, the outer walls of the eccentric inner ring of the shaft are equipped with a centering bearing, and the two centering bearings are respectively installed in the inner holes of the first compression scroll movable plate, the second compression scroll movable plate, and the inner holes of the first vacuum scroll movable plate, the second vacuum scroll movable plate.

[0012] The first compression scroll fixed plate, the second compression scroll fixed plate, the first compression scroll movable plate, the second compression scroll movable plate, the first vacuum scroll fixed plate, the second vacuum scroll fixed plate, the first vacuum scroll movable plate and the second vacuum scroll movable plate are all made of a material mixed with PEEK mixed with carbon fiber powder and polytetrafluoroethylene, and the floating wear-resistant ring is made of a flexible material mixed with PEEK and polytetrafluoroethylene.

[0013] Furthermore, the volumes of the first vacuum scroll and the second vacuum scroll are greater than the volumes of the first compression scroll and the second compression scroll.

[0014] Furthermore, a compression end eccentric group is installed between the first compression scroll fixed plate and the second compression scroll fixed plate, and the compression end eccentric group includes an eccentric pin, four rotor eccentric wheels and four floating bearings. The four floating bearings are installed on the outer wall of the rotor eccentric wheel, and the four rotor eccentric wheels are sleeved on the outer wall of the eccentric pin. The two outer floating bearings are respectively installed on the outer side of the inner wall of the first compression scroll fixed plate and the second compression scroll fixed plate, and the two inner floating bearings are respectively installed on the outer side of the side wall of the first compression scroll movable plate and the second compression scroll movable plate. The eccentric spacing of the eccentric pin is the same as the eccentric spacing of the square shaft.

[0015] A vacuum end eccentric group is installed between the first vacuum vortex fixed plate and the second vacuum vortex fixed plate, and the structure and assembly method of the vacuum end eccentric group are the same as those of the compression end eccentric group.

[0016] Furthermore, the inner walls of the first compression scroll fixed plate and the second compression scroll fixed plate are symmetrically provided with a first compression scroll fixed plate scroll plate reserved discharge port and a second compression scroll fixed plate scroll plate reserved discharge port which are connected to the outermost end of the scroll plate, and the outer wall of the first compression scroll fixed plate is provided with an air inlet and an exhaust port, the air inlet is located in the middle of the first compression scroll fixed plate, and the exhaust port is located on the side of the first compression scroll fixed plate, and the exhaust port is connected to the outer end of the scroll plate of the first compression scroll fixed plate.

[0017] The first vacuum scroll fixed plate and the second vacuum scroll fixed plate have the same structure as the first compression scroll fixed plate and the second compression scroll fixed plate.

[0018] Furthermore, compression scroll moving plate air holes are provided on the inner sides of the surfaces of the first compression scroll moving plate and the second compression scroll moving plate, and the diameters of the plurality of compression scroll moving plate air holes are the same and are distributed in a ring shape, and a compression scroll moving plate floating wear-resistant ring mounting groove is provided on the inner wall of the second compression scroll moving plate.

[0019] Furthermore, vacuum vortex moving plate air holes are provided on the inner sides of the surfaces of the first vacuum vortex moving plate and the second vacuum vortex moving plate, the diameters of the plurality of vacuum vortex moving plate air holes decrease successively and are distributed in a ring shape, and a vacuum vortex moving plate floating wear-resistant ring mounting groove is provided on the inner wall of the second vacuum vortex moving plate.

[0020] Furthermore, sealing grooves are provided on the outer peripheries of the inner walls of the second compression scroll fixed plate and the second vacuum scroll fixed plate, and sealing rings are installed in the sealing grooves.

[0021] Furthermore, both ends of the motor body are integrally formed with a heat dissipation shell, and the side walls of the heat dissipation shell are provided with heat dissipation holes. The outer wall of the output end of the motor body is fixedly mounted with a heat-conducting counterweight wheel located inside the heat dissipation shell, and the second compression scroll fixed plate and the second vacuum scroll fixed plate are respectively fixedly mounted on the outer ends of the heat dissipation shell.

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

[0023] 1. The present invention sets two sets of moving discs and fixed discs on both sides of the motor body, which improves the gas vacuum and compressed gas volume under the same volume, and also forms a multi-level seal, thereby extending the life of the whole machine and improving work efficiency. At the same time, due to the adoption of this structural form, there is no need to make a unique match between the moving disc and the fixed disc, and the components can be used universally.

[0024] 2. The moving plate, fixed plate and floating wear-resistant ring are all made of PEEK mixed with carbon fiber powder and polytetrafluoroethylene, which can keep the moving plate in a micro-flat sealing state during operation. It has the characteristics of self-lubrication, allowing a certain range of clearance between the moving plate to improve the assembly yield while reducing assembly requirements and difficulty. This feature effectively reduces the friction coefficient between the fixed plate and the moving plate, achieving minimum friction loss during long-term operation and extending the overall life.

[0025] 3. The floating wear-resistant ring is located between two adjacent moving plates and plays a limiting role. As it wears during operation, the extruded and deformed circular spring initially installed in the floating wear-resistant ring will gradually change from an ellipse to a circle, supporting the floating wear-resistant ring and enabling it to provide a good and long-term seal between the moving plates.

[0026] 4. The vortex ventilation of the present invention forms an internal air intake cycle, so that air enters from the middle and is compressed and then discharged from the fixed disk sealed cavity. The vacuum is the opposite. The difference between the vacuum and compression ends used in VPSA oxygen production lies in the compression volume, that is, the height of the vortex disk. The volume of the vacuum end is larger than that of the compression end, thereby forming a pressure difference. In the VPSA oxygen production process, negative pressure desorption is formed through the pressure difference principle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a perspective view of the present invention.

[0028] FIG2 is an exploded view of the present invention.

[0029] FIG3 is a front cross-sectional view of the present invention.

[0030] FIG4 is a partial enlarged view of part a in FIG3 of the present invention.

[0031] FIG5 is a partial enlarged view of part b in FIG3 of the present invention.

[0032] FIG6 is an exploded view of the vacuum end of the present invention.

[0033] FIG7 is a structural diagram of the floating wear-resistant ring of the present invention.

[0034] FIG8 is a perspective view of the motor body of the present invention.

[0035] FIG9 is a perspective view of the first compression scroll fixed plate of the present invention.

[0036] FIG10 is a front view of the first compression scroll fixed plate of the present invention.

[0037] FIG11 is a cross-sectional view taken along line AA in FIG10 of the present invention.

[0038] FIG12 is a perspective view of the second compression scroll fixed plate of the present invention.

[0039] FIG13 is one of the three-dimensional views of the first compression scroll movable plate of the present invention.

[0040] FIG14 is a second perspective view of the first compression scroll movable plate of the present invention.

[0041] FIG15 is a front view of the second compression scroll movable plate of the present invention.

[0042] FIG16 is a perspective view of the second compression scroll movable plate of the present invention.

[0043] FIG17 is one of the three-dimensional views of the first vacuum scroll plate of the present invention.

[0044] FIG18 is a second perspective view of the first vacuum scroll disk of the present invention.

[0045] FIG19 is a front view of the second vacuum scroll of the present invention.

[0046] FIG20 is a perspective view of the second vacuum scroll plate of the present invention.

[0047] FIG21 is a structural diagram of the coil spring of the present invention.

[0048] The reference numerals include: 1, motor body, 11, square shaft, 12, heat dissipation shell, 13, heat conduction counterweight wheel, 2, compression end, 21, first compression scroll fixed plate, 211, first compression scroll fixed plate scroll plate reserved discharge port, 212, air inlet, 213, exhaust port, 22, second compression scroll fixed plate, 221, second compression scroll fixed plate scroll plate reserved discharge port, 23, first compression scroll rotating plate, 24, second compression scroll rotating plate, 241, compression scroll rotating plate vent, 2 42. Mounting groove for floating wear-resistant ring of compression scroll moving plate, 25. Eccentric group at compression end, 3. Vacuum end, 31. First vacuum scroll fixed plate, 32. Second vacuum scroll fixed plate, 33. First vacuum scroll moving plate, 34. Second vacuum scroll moving plate, 341. Air vent of vacuum scroll moving plate, 342. Mounting groove for floating wear-resistant ring of vacuum scroll moving plate, 35. Eccentric group at vacuum end, 4. Joint, 5. Floating wear-resistant ring, 6. Centering bearing, 7. Eccentric inner ring of shaft, 8. Sealing ring, 9. Coil spring. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] 1 to 20 , the floating oil-free vacuum scroll compressor includes a motor body 1 , a compression end 2 , a vacuum end 3 and a joint 4 . The compression end 2 and the vacuum end 3 are respectively assembled at both ends of the motor body 1 .

[0051] The motor body 1 is a power structure used to drive the moving disks in the compression end 2 and the vacuum end 3 to move.

[0052] The compression end 2 includes a first compression scroll fixed plate 21, a second compression scroll fixed plate 22, a first compression scroll movable plate 23 and a second compression scroll movable plate 24. The first compression scroll movable plate 23 and the second compression scroll movable plate 24 are located inside the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22, and the first compression scroll movable plate 23 and the second compression scroll movable plate 24 are assembled at one side output end of the motor body 1.

[0053] The vacuum end 3 includes a first vacuum scroll fixed plate 31, a second vacuum scroll fixed plate 32, a first vacuum scroll movable plate 33 and a second vacuum scroll movable plate 34. The first vacuum scroll movable plate 33 and the second vacuum scroll movable plate 34 are located inside the first vacuum scroll fixed plate 31 and the second vacuum scroll fixed plate 32, and the first vacuum scroll movable plate 33 and the second vacuum scroll movable plate 34 are assembled at the output end on the other side of the motor body 1.

[0054] Both the compression end 2 and the vacuum end 3 change the traditional fixed disk structure from one to two, and set two moving disks inside to match the two fixed disks respectively. Under the same volume, the gas vacuum and compressed gas volume are improved, and a multi-level seal is formed, which increases the life of the whole machine and improves work efficiency. At the same time, due to the use of this structural form, there is no need to make a unique match between the moving disk and the fixed disk, and the components can be used universally.

[0055] Floating wear-resistant rings 5 ​​are installed between the first compression scroll 23 and the second compression scroll 24 , and between the first vacuum scroll 33 and the second vacuum scroll 34 . Coil springs 9 are installed inside the floating wear-resistant rings 5 ​​.

[0056] As shown in FIG7 and FIG21, the circular spring 9 is a circular spring with a compressible variable. During initial assembly, the circular spring 9 is tilted and placed in the floating wear-resistant ring 5, so that the cross section of the circular spring 9 forms an elliptical shape.

[0057] The output ends on both sides of the motor body 1 are integrally formed with an eccentrically arranged square shaft 11, the outer wall of the square shaft 11 is sleeved with an eccentric inner ring 7, the outer wall of the eccentric inner ring 7 is equipped with a straightening bearing 6, and the two straightening bearings 6 are respectively assembled in the inner holes of the first compression scroll movable plate 23, the second compression scroll movable plate 24 and the inner holes of the first vacuum scroll movable plate 33, the second vacuum scroll movable plate 34.

[0058] Through the cooperation of the square shaft 11, the eccentric inner ring 7 and the centering bearing 6, the motor body 1 can drive the moving disc in the compression end 2 and the vacuum end 3 to deflect during operation, thereby forming a vortex in the meshing part between the moving disc and the fixed disc to complete the compression of the gas.

[0059] The first compression scroll fixed plate 21, the second compression scroll fixed plate 22, the first compression scroll movable plate 23, the second compression scroll movable plate 24, the first vacuum scroll fixed plate 31, the second vacuum scroll fixed plate 32, the first vacuum scroll movable plate 33 and the second vacuum scroll movable plate 34 are all made of a material mixed with PEEK mixed with carbon fiber powder and polytetrafluoroethylene, and the floating wear-resistant ring 5 is made of a flexible material mixed with PEEK and polytetrafluoroethylene.

[0060] The material mixed with PEEK, carbon fiber powder and polytetrafluoroethylene has self-lubricating function.

[0061] When the structure of this material realizes the self-lubricating function, slight wear will be generated during operation, and the movable plate will be in a slight flat sealing state, that is, a certain gap range is allowed for the movable plate, thereby improving the assembly yield rate while reducing the assembly requirements and difficulty. This characteristic effectively reduces the friction coefficient between the fixed plate and the movable plate, achieving minimal friction loss during long-term operation, improving the overall life, and realizing a floating installation method.

[0062] In addition, as the system runs, a certain gap will appear on the moving disc, and since the floating wear-resistant ring 5 is a flexible ring structure, the circular spring 9 will slowly change from an ellipse during installation to a circle, supporting the floating wear-resistant ring 5 and allowing the floating wear-resistant ring 5 to play a long-term sealing role between the two moving discs.

[0063] Specifically, as shown in FIG. 3 , the volumes of the first vacuum scroll 33 and the second vacuum scroll 34 are greater than the volumes of the first compression scroll 23 and the second compression scroll 24 .

[0064] The volume of the vacuum end 3 is made larger than that of the compression end 2, thereby forming a pressure difference. In the VPSA oxygen production process, negative pressure desorption is formed through the pressure difference principle.

[0065] The structures inside the compression end 2 and the vacuum end 3 are roughly the same, and the main difference is in volume.

[0066] Specifically, as shown in Figures 4 and 5, a compression end eccentric group 25 is installed between the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22. The compression end eccentric group 25 includes an eccentric pin, four rotor eccentric wheels and four floating bearings. The four floating bearings are installed on the outer wall of the rotor eccentric wheel. The four rotor eccentric wheels are sleeved on the outer wall of the eccentric pin. The two outer floating bearings are respectively installed on the outer side of the inner wall of the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22. The two inner floating bearings are respectively installed on the outer side of the side wall of the first compression scroll movable plate 23 and the second compression scroll movable plate 24. The eccentric spacing of the eccentric pin is the same as the eccentric spacing of the square shaft 11.

[0067] A vacuum end eccentric group 35 is installed between the first vacuum scroll fixed plate 31 and the second vacuum scroll fixed plate 32 , and the structure and assembly method of the vacuum end eccentric group 35 are the same as those of the compression end eccentric group 25 .

[0068] As can be seen from Figures 1 and 2, three eccentric pins and bearing assembly points are provided on the outside of each movable plate and fixed plate.

[0069] The eccentric spacing of the eccentric pin is not only the same as the eccentric spacing of the square shaft 11, but the deflection angles of the eccentric pin and the square shaft 11 are also the same, so that the moving disk operates within a fixed logic range.

[0070] Specifically, as shown in Figures 9 to 12, the inner walls of the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22 are symmetrically provided with a first compression scroll fixed plate vortex reserved discharge port 211 and a second compression scroll fixed plate vortex reserved discharge port 221 which are connected to the outermost end of the vortex plate, and the outer wall of the first compression scroll fixed plate 21 is provided with an air inlet 212 and an exhaust port 213, the air inlet 212 is located in the middle of the first compression scroll fixed plate 21, and the exhaust port 213 is located on the side of the first compression scroll fixed plate 21, and the exhaust port 213 is connected to the outer end of the vortex plate of the first compression scroll fixed plate 21.

[0071] As shown in FIG. 11 , a hole communicating with the exhaust port 213 is provided on the scroll groove of the scroll plate of the first compression scroll fixed plate 21 .

[0072] During installation, the surfaces of the vortex plates of the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22 are fitted together, so the gas compressed by the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22 is connected at the reserved discharge port 211 of the first compression scroll fixed plate and the reserved discharge port 221 of the second compression scroll fixed plate, so that the compressed gas can eventually reach the exhaust port 213 and be discharged.

[0073] The first vacuum scroll fixed plate 31 and the second vacuum scroll fixed plate 32 have the same structure as the first compression scroll fixed plate 21 and the second compression scroll fixed plate 22 .

[0074] Specifically, as shown in Figures 13 to 16, compression scroll moving plate air holes 241 are provided on the inner sides of the surfaces of the first compression scroll moving plate 23 and the second compression scroll moving plate 24. The diameters of the multiple compression scroll moving plate air holes 241 are the same and are distributed in a ring shape. The inner wall of the second compression scroll moving plate 24 is provided with a compression scroll moving plate floating wear-resistant ring mounting groove 242.

[0075] As shown in Figure 14, the inner circle of the scroll surface of the first compression scroll movable plate 23 is provided with a groove, so that the compression scroll movable plate vent 241 is connected to the air inlet 212, so that the incoming gas can directly reach the meshing space between the first compression scroll movable plate 23 and the first compression scroll fixed plate 21. Similarly, the inner circle of the scroll surface of the second compression scroll movable plate 24 is also provided with a groove.

[0076] Due to the installation of the square shaft 11, the straightening bearing 6 and the eccentric inner ring 7, part of the gas entering from the air inlet 212 is compressed in the meshing space between the first compression scroll movable plate 23 and the first compression scroll fixed plate 21, and the other part reaches the meshing space between the second compression scroll movable plate 24 and the second compression scroll fixed plate 22 through the compression scroll movable plate vent 241 and is compressed.

[0077] Specifically, as shown in Figures 17 to 20, vacuum vortex disk ventilation holes 341 are provided on the inner sides of the surfaces of the first vacuum vortex disk 33 and the second vacuum vortex disk 34. The diameters of the plurality of vacuum vortex disk ventilation holes 341 decrease successively and are distributed in a ring shape. The inner wall of the second vacuum vortex disk 34 is provided with a vacuum vortex disk floating wear-resistant ring mounting groove 342.

[0078] As shown in Figure 18, the inner circle of the vortex disk surface of the first vacuum vortex disk 33 is provided with a groove, so that the vacuum vortex disk vent 341 is connected to the air inlet 212 on the first vacuum vortex fixed disk 31, so that the incoming gas can directly reach the meshing space between the first vacuum vortex disk 33 and the first vacuum vortex fixed disk 31. Similarly, the inner circle of the vortex disk surface of the second vacuum vortex disk 34 is also provided with a groove.

[0079] Therefore, the gas entering the vacuum end 3 is compressed in the meshing space between the first vacuum scroll movable plate 33 and the first vacuum scroll fixed plate 31 and in the meshing space between the second vacuum scroll movable plate 34 and the second vacuum scroll fixed plate 32 through the action of the groove and the vacuum scroll movable plate vent 341.

[0080] In addition, the shapes of the compression scroll vent holes 241 and the vacuum scroll vent holes 341 are designed. The compression scroll vent holes 241 have the same diameter and are distributed along a ring. The purpose is to enhance the stability of the positive pressure through the compression scroll vent holes 241 and the sealing part of the double scroll air flow, focusing on positive pressure.

[0081] The purpose of decreasing the diameter of the vacuum vortex moving plate vent holes 341 and distributing them along a ring is to improve the efficiency of negative pressure discharge through the vacuum vortex moving plate vent holes 341 and the double moving plate air sealing part, focusing on negative pressure.

[0082] Specifically, as shown in FIG2 and FIG6 , a sealing groove is provided on the outer periphery of the inner wall of the second compression scroll fixed plate 22 and the second vacuum scroll fixed plate 32 , and a sealing ring 8 is installed in the sealing groove.

[0083] Specifically, as shown in Figure 8, both ends of the motor body 1 are integrally formed with a heat dissipation shell 12, and the side walls of the heat dissipation shell 12 are provided with heat dissipation holes. The outer wall of the output end of the motor body 1 is fixedly mounted with a heat-conducting counterweight wheel 13 located inside the heat dissipation shell 12, and the second compression scroll fixed plate 22 and the second vacuum scroll fixed plate 32 are respectively fixedly mounted on the outer ends of the heat dissipation shell 12.

[0084] The function of the heat-conducting counterweight wheel 13 is to enhance the rotation force and dynamic balance of the motor shaft, and at the same time to dissipate heat for the motor. The heat is mainly dissipated through the heat dissipation holes on the heat dissipation shell 12.

[0085] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the concept of the present invention, many changes can be made in the specific implementation method and application scope. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. Floating oil-free vacuum scroll compressor, characterized by: It comprises a motor body (1), a compression end (2), a vacuum end (3) and a joint (4), wherein the compression end (2) and the vacuum end (3) are respectively mounted on two ends of the motor body (1); The compression end (2) comprises a first compression scroll fixed plate (21), a second compression scroll fixed plate (22), a first compression scroll movable plate (23) and a second compression scroll movable plate (24), wherein the first compression scroll movable plate (23) and the second compression scroll movable plate (24) are located inside the first compression scroll fixed plate (21) and the second compression scroll fixed plate (22), and the first compression scroll movable plate (23) and the second compression scroll movable plate (24) are assembled at one side output end of the motor body (1); The vacuum end (3) comprises a first vacuum vortex fixed disk (31), a second vacuum vortex fixed disk (32), a first vacuum vortex movable disk (33) and a second vacuum vortex movable disk (34), wherein the first vacuum vortex movable disk (33) and the second vacuum vortex movable disk (34) are located inside the first vacuum vortex fixed disk (31) and the second vacuum vortex fixed disk (32), and the first vacuum vortex movable disk (33) and the second vacuum vortex movable disk (34) are mounted on the output end on the other side of the motor body (1); A floating wear-resistant ring (5) is installed between the first compression scroll movable plate (23) and the second compression scroll movable plate (24), and between the first vacuum scroll movable plate (33) and the second vacuum scroll movable plate (34), and a circular spring (9) is installed inside the floating wear-resistant ring (5); The output ends on both sides of the motor body (1) are integrally formed with an eccentrically arranged square shaft (11), the outer wall of the square shaft (11) is sleeved with an eccentric inner ring (7), the outer wall of the eccentric inner ring (7) is equipped with a centering bearing (6), and the two centering bearings (6) are respectively installed in the inner holes of the first compression scroll moving plate (23) and the second compression scroll moving plate (24) and in the inner holes of the first vacuum scroll moving plate (33) and the second vacuum scroll moving plate (34); The first compression scroll fixed plate (21), the second compression scroll fixed plate (22), the first compression scroll movable plate (23), the second compression scroll movable plate (24), the first vacuum scroll fixed plate (31), the second vacuum scroll fixed plate (32), the first vacuum scroll movable plate (33) and the second vacuum scroll movable plate (34) are all made of a material obtained by mixing PEEK with carbon fiber powder and polytetrafluoroethylene, and the floating wear-resistant ring (5) is made of a flexible material obtained by mixing PEEK with polytetrafluoroethylene; The volumes of the first vacuum scroll movable plate (33) and the second vacuum scroll movable plate (34) are greater than the volumes of the first compression scroll movable plate (23) and the second compression scroll movable plate (24).

2. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: A compression end eccentric group (25) is installed between the first compression scroll fixed plate (21) and the second compression scroll fixed plate (22), and the compression end eccentric group (25) includes an eccentric pin, four rotor eccentric wheels and four floating bearings. The four floating bearings are installed on the outer wall of the rotor eccentric wheel, and the four rotor eccentric wheels are sleeved on the outer wall of the eccentric pin. The two outer floating bearings are respectively installed on the outer side of the inner wall of the first compression scroll fixed plate (21) and the second compression scroll fixed plate (22), and the two inner floating bearings are respectively installed on the outer side of the side wall of the first compression scroll movable plate (23) and the second compression scroll movable plate (24). The eccentric spacing of the eccentric pin is the same as the eccentric spacing of the square shaft (11); A vacuum end eccentric group (35) is installed between the first vacuum vortex fixed plate (31) and the second vacuum vortex fixed plate (32), and the vacuum end eccentric group (35) has the same structure and assembly method as the compression end eccentric group (25).

3. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: The inner walls of the first compression scroll fixed disk (21) and the second compression scroll fixed disk (22) are symmetrically provided with a first compression scroll fixed disk reserved discharge port (211) and a second compression scroll fixed disk reserved discharge port (221) which are connected to the outermost end of the scroll disk; the outer wall of the first compression scroll fixed disk (21) is provided with an air inlet (212) and an air outlet (213); the air inlet (212) is located in the middle of the first compression scroll fixed disk (21), and the air outlet (213) is located on the side of the first compression scroll fixed disk (21); the air outlet (213) is connected to the outer end of the scroll disk of the first compression scroll fixed disk (21); The first vacuum scroll fixed plate (31) and the second vacuum scroll fixed plate (32) have the same structure as the first compression scroll fixed plate (21) and the second compression scroll fixed plate (22).

4. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: Compression scroll moving disk air holes (241) are provided on the inner sides of the surfaces of the first compression scroll moving disk (23) and the second compression scroll moving disk (24); the diameters of the plurality of compression scroll moving disk air holes (241) are the same and they are distributed in a ring shape; and a compression scroll moving disk floating wear-resistant ring mounting groove (242) is provided on the inner wall of the second compression scroll moving disk (24).

5. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: The inner sides of the surfaces of the first vacuum vortex moving disk (33) and the second vacuum vortex moving disk (34) are provided with vacuum vortex moving disk ventilation holes (341), the diameters of the plurality of vacuum vortex moving disk ventilation holes (341) decrease successively and are distributed in a ring shape, and the inner wall of the second vacuum vortex moving disk (34) is provided with a vacuum vortex moving disk floating wear-resistant ring mounting groove (342).

6. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: The inner walls of the second compression scroll fixed plate (22) and the second vacuum scroll fixed plate (32) are both provided with sealing grooves on their outer circumferences, and sealing rings (8) are installed in the sealing grooves.

7. The floating oil-free vacuum scroll compressor according to claim 1, characterized in that: Both ends of the motor body (1) are integrally formed with a heat dissipation shell (12), and the side wall of the heat dissipation shell (12) is provided with heat dissipation holes. A heat-conducting weight wheel (13) located inside the heat dissipation shell (12) is fixedly mounted on the outer wall of the output end of the motor body (1), and the second compression scroll fixed plate (22) and the second vacuum scroll fixed plate (32) are respectively fixedly mounted on the outer ends of the heat dissipation shell (12).

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