Novel oil-free scroll compressor

Abstract

The invention discloses a novel oil-free scroll compressor, and relates to the technical field of compressors, the novel oil-free scroll compressor comprises a main shell and a main shaft rotatably connected in the main shell, and further comprises: a static disc component, which comprises a positioning frame fixedly connected to the main shell and a static scroll plate fixedly connected to the positioning frame; the movable plate component comprises a movable scroll plate which is in transmission connection with the main shaft, a plurality of wear-resistant surfaces which are distributed in a circumferential array are fixedly connected to the movable scroll plate, positioning holes are formed in the wear-resistant surfaces, and anti-rotation pins are fixedly mounted in the positioning holes; according to the novel oil-free scroll compressor, the anti-rotation pin and the wear-resistant ring form an anti-rotation mechanism, high-temperature lubricating grease forms an anti-attrition wear-resistant lubricating film between the anti-rotation pin and the wear-resistant pin ring, and the high-temperature lubricating grease permeates between the wear-resistant ring on the end surface and the wear-resistant surface of the movable disc to form a pair of dynamic friction pairs during operation; lubricating grease plays a role in reducing abrasion and resisting abrasion, and the movable disc abrasion-resisting face, the end face abrasion-resisting ring, the abrasion-resisting pin ring and the anti-rotation pin form a set of movable lubricating mechanism.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to a novel oil-free scroll compressor. Background Technology

[0002] The development of oxygen concentrators faces several limitations. The core component of oxygen concentrators remains the oil-free reciprocating compressor, with companies actively exploring lightweight, aesthetically pleasing, energy-efficient, and quiet / stable products. Domestic companies like Yuwell Medical, Weigao Group, and Biostime Medical are actively developing oil-free scroll compressors to replace traditional oil-free reciprocating compressors. The increasing proportion of the global population aged 65 and over (over 210 million in China by 2025) and the rise in respiratory disease patients, especially after the COVID-19 pandemic, have led to a surge in demand for home medical equipment, making oxygen concentrators a crucial emergency supply for families. The global home oxygen concentrator market was valued at approximately $2.5 billion in 2022 and is projected to grow at a CAGR of over 7% from 2023 to 2030. 1L models hold a significant market share due to their cost-effectiveness and portability, showing particularly strong growth in the Asia-Pacific region.

[0003] Currently, most 1L oxygen concentrator compressors on the market use piston compressors. Due to their inherent design, these compressors exhibit large fluctuations in output gas, as well as significant vibration and noise. 1L scroll compressors, on the other hand, often use a three-crank type. Because the cranks and moving / stationary discs require high precision, mass production of the entire unit is difficult, resulting in a higher market price. Summary of the Invention

[0004] The purpose of this invention is to provide a novel oil-free scroll compressor to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel oil-free scroll compressor, comprising a main housing and a main shaft rotatably connected within the main housing, and further comprising: a stationary disc component, comprising a positioning frame fixedly connected to the main housing and a stationary scroll fixedly connected to the positioning frame; a moving disc component, comprising a moving scroll connected to the main shaft, wherein the moving scroll has a plurality of wear-resistant surfaces arranged in a circumferential array fixedly connected, each wear-resistant surface having a positioning hole, and an anti-rotation pin fixedly installed in the positioning hole; a plurality of pin ring holes, each corresponding to one of the anti-rotation pins, are opened on the main housing, each pin ring hole having a wear-resistant pin ring fixedly connected to and engaging with the corresponding anti-rotation pin, each pin ring hole having a groove on its outer end face, and an end face wear-resistant ring fixedly installed in the groove, each end face wear-resistant ring and the corresponding wear-resistant surface forming a sealed cavity, and the sealed cavity being filled with high-temperature resistant grease.

[0006] Preferably, the moving disk component further includes a moving disk elastic strip fixedly connected to the moving scroll disk and a moving disk sealing strip assembled on the moving scroll disk, wherein the length direction of the moving disk sealing strip is the length direction of the scroll disk vortex.

[0007] Preferably, a moving disk bearing is rotatably connected to the moving scroll disk, and the moving disk bearing is eccentrically connected to the main shaft with a small clearance. The process of the main shaft rotating drives the moving disk bearing to perform cam motion, and under the restriction of each anti-rotation pin and the corresponding wear-resistant pin ring, the moving scroll disk performs a rotary horizontal motion relative to the stationary scroll disk.

[0008] Preferably, the stationary disk component includes a stationary disk elastic strip fixedly connected to the stationary scroll plate and a stationary disk sealing strip assembled on the stationary scroll plate, wherein the length direction of the stationary disk sealing strip is the length direction of the scroll plate.

[0009] Preferably, a vortex cavity is formed between the vortex portion of the stationary vortex disk and the vortex portion of the moving vortex disk, and an exhaust pipe head and an intake pipe head communicating with the vortex cavity are fixedly connected to the stationary vortex disk.

[0010] Preferably, the main housing is provided with a motor stator component for driving the main shaft to rotate, and a rotor component is provided inside the stator component, and the rotor component is fixedly connected to the main shaft.

[0011] Preferably, a counterweight is installed inside the main housing, and the counterweight is fixedly connected to the main shaft. A main bearing is provided on the main housing, and the inner and outer rings of the main bearing are fixedly connected to the main housing and the main shaft, respectively.

[0012] Preferably, an end cover is fixedly connected to the main housing, and a first bearing that is rotatably connected to the end cover and has a small clearance fit with the main shaft is connected to it.

[0013] Preferably, a small counterweight is assembled on the rotor component inside the main housing.

[0014] In the above technical solution, the present invention provides a novel oil-free scroll compressor. When the compressor operates, driving the main shaft to rotate, the anti-rotation pin and the wear-resistant ring form an anti-rotation mechanism. High-temperature grease forms a friction-reducing and wear-resistant lubricating film between the anti-rotation pin and the wear-resistant pin ring. During operation, the high-temperature grease penetrates into the wear-resistant ring on the end face and the wear-resistant surface of the moving disc to form a pair of dynamic friction pairs. The grease plays a role in reducing friction and wear resistance. The wear-resistant surface of the moving disc, the wear-resistant ring on the end face, the wear-resistant pin ring, and the anti-rotation pin form a dynamic lubrication mechanism, which can replace the sliding bearing and the three-crank crank bearing. The anti-rotation pin and the wear-resistant pin ring on the moving disc replace the crank in the three-crank mechanism. In this way, the overall manufacturing cost is greatly reduced, the assembly difficulty is also greatly reduced, and the whole product has the advantages of stable continuous scroll air output, low noise, and low vibration. The overall manufacturing cost is greatly reduced, and the product competitiveness is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the moving disk component structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the static disk component structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the static vortex disk structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the moving scroll disk structure provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Exhaust pipe head; 2. Intake pipe head; 3. Moving disc assembly; 4. Stationary disc assembly; 5. Wear-resistant pin ring; 6. Counterweight; 7. Motor stator assembly; 8. Main shaft; 9. Small counterweight; 10. End cover; 11. First bearing; 12. Tightening screw; 13. End face wear-resistant ring; 31. Moving disc sealing strip; 32. Moving disc elastic strip; 33. Moving scroll plate; 34. Moving disc bearing; 35. Anti-rotation pin; 41. Stationary disc sealing strip; 42. Stationary disc elastic strip; 43. Stationary scroll plate; 44. Positioning frame; 14. Pin ring hole; 15. Wear-resistant surface; 16. Main housing; 17. Positioning hole. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Please see Figure 1-5This invention provides a novel oil-free scroll compressor, comprising a main housing 16 and a main shaft 8 rotatably connected within the main housing 16, as well as a stationary disc component 4, a moving disc component 3, and multiple pin ring holes 14. The stationary disc component 4 includes a positioning frame 44 fixedly connected to the main housing 16 and a stationary scroll 43 fixedly connected to the positioning frame 44. The moving disc component 3 includes a moving scroll 33 drivenly connected to the main shaft 8, and multiple wear-resistant surfaces 15 arranged in a circumferential array are fixedly connected to the moving scroll 33. Each wear-resistant surface 15 has a positioning hole 17, and an anti-rotation pin 35 is fixedly installed in the positioning hole 17; multiple pin ring holes 14 are opened on the main housing 16 in a one-to-one correspondence with each anti-rotation pin 35, and a wear-resistant pin ring 5 that is inserted and engaged with the corresponding anti-rotation pin 35 is fixedly connected in each pin ring hole 14. A groove is opened on the outer end face of each pin ring hole 14, and an end face wear-resistant ring 13 is fixedly installed in the groove. A sealed cavity is formed between each end face wear-resistant ring 13 and the corresponding wear-resistant surface 15, and the sealed cavity is filled with high-temperature resistant grease.

[0020] The moving scroll 33 is rotatably connected to the moving scroll bearing 34, and the moving scroll bearing 34 is eccentrically connected to the main shaft 8 with a small clearance. The rotation of the main shaft 8 drives the moving scroll bearing 34 to perform cam motion, and under the restriction of each anti-rotation pin 35 and the corresponding wear-resistant pin ring 5, the moving scroll 33 performs a rotary horizontal motion relative to the stationary scroll 43.

[0021] Specifically, when the compressor drives the main shaft 8 to rotate, the anti-rotation pin 35 and the wear-resistant ring form an anti-rotation mechanism. High-temperature grease forms a friction-reducing and wear-resistant lubricating film between the anti-rotation pin 35 and the wear-resistant pin ring 5. During operation, the high-temperature grease penetrates into the end face wear-resistant ring 13 and the moving disc wear-resistant surface 15 to form a pair of dynamic friction pairs. The grease plays a role in reducing friction and wear resistance. The moving disc wear-resistant surface 15, the end face wear-resistant ring, the wear-resistant pin ring 5, and the anti-rotation pin 35 form a dynamic lubrication mechanism, which can replace the sliding bearing and the three-crank crank bearing. The anti-rotation pin 35 and the wear-resistant pin ring 5 on the moving disc replace the crank in the three-crank mechanism. In this way, the overall manufacturing cost is greatly reduced, the assembly difficulty is also greatly reduced, and the whole product has the advantages of stable continuous vortex air output, low noise, and low vibration. The overall manufacturing cost is greatly reduced, and the product competitiveness is improved.

[0022] The moving disk component 3 also includes a moving disk elastic strip 32 fixedly connected to the moving scroll disk 33 and a moving disk sealing strip 31 assembled on the moving scroll disk 33. The length direction of the moving disk sealing strip 31 is the length direction of the scroll of the moving scroll disk 33.

[0023] The stationary disk component 4 includes a stationary disk elastic strip 42 fixedly connected to the stationary scroll plate 43 and a stationary disk sealing strip 41 assembled on the stationary scroll plate 43. The length direction of the stationary disk sealing strip 41 is the length direction of the scroll plate 43.

[0024] In this design, a vortex cavity is formed between the vortex portion of the stationary vortex disk 43 and the vortex portion of the moving vortex disk 33. An exhaust pipe head 1 and an intake pipe head 2, which communicate with the vortex cavity, are fixedly connected to the stationary vortex disk 43. Specifically, when the vortex portion of the moving vortex disk 33 performs a rotary horizontal motion, the vortex cavity formed between the vortex portions of the stationary and moving vortex disks 43 allows for air intake through the intake pipe head 2 and air exhaust through the exhaust pipe head 1.

[0025] The main housing 16 houses a motor stator component 7 for driving the main shaft 8 to rotate. A rotor component is located inside the stator component and is fixedly connected to the main shaft 8. A counterweight 6 is mounted inside the main housing 16 and is fixedly connected to the main shaft 8. A main bearing is mounted on the main housing 16, with its inner and outer rings fixedly connected to the main housing 16 and the main shaft 8, respectively. An end cover 10 is fixedly connected to the main housing 16 (the end cover 10 is fixedly connected by end cover 10 tightening screws 12), and a first bearing 11, fixedly connected to the main shaft 8, is rotatably connected to the end cover 10. A small counterweight 9 is mounted on the rotor component inside the main housing 16 to maintain internal balance.

[0026] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A new type of oil-free scroll compressor comprising a main housing (16) and a main shaft (8) rotatably connected in the main housing (16), characterized in that, Also include: The static disc component (4) includes a positioning frame (44) fixedly connected to the main shell (16) and a static scroll (43) fixedly connected to the positioning frame (44); The dynamic disc component (3) includes a dynamic scroll (33) drivingly connected with the main shaft (8), a plurality of wear-resistant surfaces (15) in a circumferential array are fixedly connected to the dynamic scroll (33), a positioning hole (17) is formed in each wear-resistant surface (15), and an anti-rotation pin is fixedly installed in the positioning hole (17); A plurality of pin ring holes (14) are formed in the main shell (16) in one-to-one correspondence with the anti-rotation pins, a wear-resistant pin ring (5) is fixedly connected to each pin ring hole (14) in plug-in cooperation with the corresponding anti-rotation pin, a groove is formed in the outer end surface of each pin ring hole (14), and an end face wear-resistant ring (13) is fixedly installed in the groove, a closed cavity is formed between each end face wear-resistant ring (13) and the corresponding wear-resistant surface (15), and high-temperature resistant lubricating grease is filled in the closed cavity.

2. A novel oil-free scroll compressor as claimed in claim 1, wherein, The dynamic disc component (3) further includes a dynamic disc elastic strip (32) fixedly connected to the dynamic scroll (33) and a dynamic disc sealing strip (31) assembled on the dynamic scroll (33), and the length direction of the dynamic disc sealing strip (31) is the length direction of the scroll of the dynamic scroll (33).

3. A novel oil-free scroll compressor as claimed in claim 1, wherein, The dynamic scroll (33) is rotatably connected with a dynamic disc bearing (34), and the dynamic disc bearing (34) is eccentrically and gapingly connected with the main shaft (8), the main shaft (8) drives the dynamic disc bearing (34) to make cam motion in the process of rotating motion, and the dynamic scroll (33) makes rotary plane motion relative to the static scroll (43) under the limitation of the anti-rotation pins and the corresponding wear-resistant pin rings (5).

4. A novel oil-free scroll compressor as claimed in claim 1, wherein, The static disc component (4) includes a static disc elastic strip (42) fixedly connected to the static scroll (43) and a static disc sealing strip (41) assembled on the static scroll (43), and the length direction of the static disc sealing strip (41) is the length direction of the scroll of the static scroll (43).

5. A novel oil-free scroll compressor as claimed in claim 1, wherein, The scroll part of the static scroll (43) and the scroll part of the dynamic scroll (33) form a scroll cavity, and an exhaust pipe head (1) and an air suction pipe head (2) are fixedly connected to the static scroll (43) and communicate with the scroll cavity.

6. A novel oil-free scroll compressor as claimed in claim 1, wherein, The main shell (16) is provided with a motor stator component (7) for driving the main shaft (8) to rotate, a rotor component is arranged inside the stator component, and the rotor component is fixedly connected with the main shaft (8).

7. A novel oil-free scroll compressor as claimed in claim 1, wherein, The main shell (16) is assembled with a counterweight (6), the counterweight (6) is fixedly connected with the main shaft (8), the main shell (16) is provided with a main bearing, and the inner and outer rings of the main bearing are fixedly connected with the main shell (16) and the main shaft (8) respectively.

8. A novel oil-free scroll compressor as claimed in claim 1, wherein, The main shell (16) is fixedly connected with an end cover (10), and the end cover (10) is rotatably connected with a first bearing (11) fixedly connected with the main shaft (8).

9. A novel oil-free scroll compressor as claimed in claim 1, wherein, The rotor component in the main shell (16) is assembled with a small counterweight (9).

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