Oil-free screw air compressor with wave spring structure

Abstract

The utility model discloses an oil-free screw air compressor with a wave spring structure, which comprises a female rotor component, a male rotor component and an oil-free screw air compressor casing, the female rotor component is mounted and connected in the oil-free screw air compressor casing, the male rotor component is arranged on the outer side of the female rotor component, and the oil-free screw air compressor casing is arranged on the outer side of the male rotor component. A first bearing is arranged on the peripheral side of the front end of the female rotor component, a first wave spring is arranged between the first bearing and a machine shell of the oil-free screw air compressor, and a female rotor bearing is arranged on the peripheral side of the rear end of the female rotor component. By arranging the first wave spring, the second wave spring, the female rotor wave spring and the male rotor wave spring, the axial displacement of the bearing can be eliminated or reduced at the position of the bearing, the stability and normal operation of the air compressor are kept, the operation noise is reduced, the axial load and rigidity of the bearing can be improved, and the service life of the bearing is prolonged; and the structure size is compact, and the required installation space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-free screw air compressors, and particularly relates to an oil-free screw air compressor with a wave spring structure. Background Technique

[0002] An oil-free screw air compressor is a special compressor. It can operate the rotor inside the compressor without using lubricating oil. The working principle of an oil-free screw compressor is mainly to suck air into the machine interior through the meshing of a pair of rotors that do not directly contact each other, then compress it, and finally discharge the high-pressure gas. In this process, due to the special design of the rotors, no lubricating oil participates in the compression chamber (i.e., the rotors) during the compression process. Therefore, the discharged gas is very clean and free of oil pollution, making it very suitable for some occasions with high requirements for gas purity, such as food processing, medical devices, etc. Another advantage of oil-free screw air compressors is that they are relatively quiet and vibration-free during operation, which makes them very suitable for use in environments where the noise level needs to be kept at the lowest level.

[0003] The existing oil-free screw air compressors currently have the following problems: the bearings of the oil-free screw air compressors are easily worn, with a short service life, large vibration and high noise during the operation of the air compressor. Moreover, when the oil-free screw air compressor is operating normally, the vibration generated by the rotation of the rotor is likely to cause axial offset or displacement, which will affect the axial load of the bearing, reduce the rigidity of the bearing, resulting in bearing slip and affecting the service life of the bearing.

[0004] Therefore, it is necessary to propose a new oil-free screw air compressor with a wave spring structure to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an oil-free screw air compressor with a wave spring structure to solve the problems of large vibration, high noise, and easy axial offset or displacement generated by the rotation of the rotor in the existing oil-free screw air compressors, thus affecting the service life as mentioned in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: An oil-free screw air compressor with a wave spring structure, comprising a female rotor component, a male rotor component, and an oil-free screw air compressor housing. The female rotor component is installed and connected at an internal position of the oil-free screw air compressor housing. A male rotor component is arranged outside the female rotor component. A first bearing is arranged on the circumferential side of the front end of the female rotor component. A first wave spring is arranged between the first bearing and the oil-free screw air compressor housing. A female rotor bearing is arranged on the circumferential side of the rear end of the female rotor component. A female rotor wave spring is arranged between the female rotor bearing and the oil-free screw air compressor housing. A second bearing is arranged on the circumferential side of the front end of the male rotor component. A second wave spring is arranged between the second bearing and the oil-free screw air compressor housing. A male rotor bearing is arranged on the circumferential side of the rear end of the male rotor component. A male rotor wave spring is arranged between the male rotor bearing and the oil-free screw air compressor housing.

[0007] Among them, the male rotor component includes a male rotor shaft rod, male rotor blades, and an outer shaft sleeve. An outer shaft sleeve is arranged on the circumferential side of the male rotor shaft rod. Male rotor blades are arranged on the circumferential side of the outer shaft sleeve. The rear end of the male rotor shaft rod is connected to the male rotor bearing. The front end of the male rotor shaft rod is connected to the second bearing.

[0008] Among them, the female rotor component includes a female rotor shaft rod, a female rotor shaft sleeve, and female rotor rotating blades. A female rotor shaft sleeve is arranged on the circumferential side of the female rotor shaft rod. Female rotor rotating blades are arranged on the circumferential side of the female rotor shaft sleeve. The rear end of the female rotor shaft rod is connected to the female rotor bearing. The front end of the female rotor shaft rod is connected to the first bearing.

[0009] Among them, the female rotor bearing includes a bearing inner sleeve, bearing rollers, a bearing outer shell, and a bearing sleeve cavity. Bearing rollers are arranged in a circle inside the bearing outer shell. A bearing inner sleeve is arranged in a circle inside the bearing rollers. A bearing sleeve cavity is arranged inside the bearing inner sleeve. The bearing outer shell is connected to the oil-free screw air compressor housing. The bearing inner sleeve is connected to the female rotor shaft rod through the bearing sleeve cavity.

[0010] Among them, the male rotor wave spring includes a wave spring upper wave surface, a wave spring body, a wave spring lower wave surface, and a wave spring middle sleeve hole. A wave spring middle sleeve hole is arranged in the middle inside the wave spring body. A wave spring upper wave surface is arranged on the upper surface of the wave spring body. A wave spring lower wave surface is arranged on the lower surface of the wave spring body. The wave spring body is connected to the oil-free screw air compressor housing.

[0011] Among them, the first wave spring, the second wave spring, the female rotor wave spring, and the male rotor wave spring have the same shape.

[0012] Among them, the sizes of the first wave spring and the second wave spring are OD47×ID38.18×2.44.

[0013] Among them, the size of the wave spring of the female rotor is OD80×ID67.49×4.29, and the size of the wave spring of the male rotor is OD72×ID40.07×4.29.

[0014] In summary, due to the adoption of the above technologies, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, by providing the structures of the first wave spring, the second wave spring, the wave spring of the female rotor, and the wave spring of the male rotor, axial displacement of the bearing can be eliminated or reduced at the bearing, maintaining the stability and normal operation of the air compressor and reducing the running noise.

[0016] 2. In the present utility model, by providing the structures of the first wave spring, the second wave spring, the wave spring of the female rotor, and the wave spring of the male rotor, the axial load and rigidity of the bearing can be improved, and the service life of the bearing can be extended.

[0017] 3. In the present utility model, by providing the structures of the first wave spring, the second wave spring, the wave spring of the female rotor, and the wave spring of the male rotor, it has the characteristics of a compact structure size and a small installation space required. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic side sectional structure view of an oil-free screw air compressor with a wave spring structure according to the present utility model;

[0019] Figure 2 It is a schematic structure view of the female rotor component and the male rotor component of an oil-free screw air compressor with a wave spring structure according to the present utility model;

[0020] Figure 3 It is a schematic structure view of the bearing structure of the female rotor of an oil-free screw air compressor with a wave spring structure according to the present utility model;

[0021] Figure 4 It is a schematic side structure view of the wave spring of the male rotor of an oil-free screw air compressor with a wave spring structure according to the present utility model;

[0022] Figure 5 It is a schematic structure view of the wave spring of the male rotor of an oil-free screw air compressor with a wave spring structure according to the present utility model.

[0023] In the figure: 1. First bearing; 2. First wave spring; 3. Female rotor component; 31. Female rotor shaft rod; 32. Female rotor shaft sleeve; 33. Female rotor blade; 4. Male rotor component; 41. Male rotor shaft rod; 42. Male rotor blade; 43. Outer shaft sleeve; 5. Female rotor bearing; 51. Bearing inner sleeve; 52. Bearing roller; 53. Bearing housing; 54. Bearing sleeve cavity; 6. Male rotor bearing; 7. Female rotor wave spring; 8. Male rotor wave spring; 81. Upper wave surface of wave spring; 82. Wave spring body; 83. Lower wave surface of wave spring; 84. Middle sleeve hole of wave spring; 9. Second bearing; 10. Second wave spring; 11. Shell of oil-free screw air compressor. Detailed implementation mode

[0024] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0025] Embodiment 1

[0026] Refer to Figure 1 and Figure 2 , an oil-free screw air compressor with a wave spring structure, including a female rotor component 3, a male rotor component 4 and a shell 11 of the oil-free screw air compressor. The female rotor component 3 is installed and connected at an internal position of the shell 11 of the oil-free screw air compressor. A male rotor component 4 is arranged outside the female rotor component 3. A first bearing 1 is arranged on the circumferential side of the front end of the female rotor component 3. A first wave spring 2 is arranged between the first bearing 1 and the shell 11 of the oil-free screw air compressor. A female rotor bearing 5 is arranged on the circumferential side of the rear end of the female rotor component 3. A female rotor wave spring 7 is arranged between the female rotor bearing 5 and the shell 11 of the oil-free screw air compressor. A second bearing 9 is arranged on the circumferential side of the front end of the male rotor component 4. A second wave spring 10 is arranged between the second bearing 9 and the shell 11 of the oil-free screw air compressor. A male rotor bearing 6 is arranged on the circumferential side of the rear end of the male rotor component 4. A male rotor wave spring 8 is arranged between the male rotor bearing 6 and the shell 11 of the oil-free screw air compressor.

[0027] In the present utility model, the male rotor component 4 includes a male rotor shaft 41, male rotor blades 42, and an outer shaft sleeve 43. The outer shaft sleeve 43 is arranged on the circumferential side of the male rotor shaft 41, and the male rotor blades 42 are arranged on the circumferential side of the outer shaft sleeve 43. The rear end of the male rotor shaft 41 is connected to the male rotor bearing 6, and the front end of the male rotor shaft 41 is connected to the second bearing 9. The rear end of the male rotor shaft 41 of the male rotor component 4 is connected to the male rotor bearing 6, and the front end of the male rotor shaft 41 is connected to the second bearing 9, so that it can be positioned and rotated. When the male rotor shaft 41 rotates, it can drive the outer shaft sleeve 43 on its circumferential side to rotate, and the outer shaft sleeve 43 drives the male rotor blades 42 to rotate.

[0028] In the present utility model, the female rotor component 3 includes a female rotor shaft 31, a female rotor shaft sleeve 32, and female rotor blades 33. The female rotor shaft sleeve 32 is arranged on the circumferential side of the female rotor shaft 31, and the female rotor blades 33 are arranged on the circumferential side of the female rotor shaft sleeve 32. The rear end of the female rotor shaft 31 is connected to the female rotor bearing 5, and the front end of the female rotor shaft 31 is connected to the first bearing 1. The rear end of the female rotor shaft 31 of the female rotor component 3 is connected to the female rotor bearing 5, and the front end of the female rotor shaft 31 is connected to the first bearing 1, so that the female rotor shaft 31 can be positioned and rotated. When the female rotor shaft 31 rotates, it can drive the female rotor shaft sleeve 32 to rotate, and the female rotor shaft sleeve 32 can drive the female rotor blades 33 to rotate.

[0029] Working principle: When in use, the female rotor component 3 and the male rotor component 4 rotate inside the housing 11 of the oil-free screw air compressor. When the shaft head end of the female rotor component 3 rotates, it is positioned and rotated through the first bearing 1 and the female rotor bearing 5 at the front and rear ends of the female rotor component 3. The first bearing 1 can adjust the preload and working clearance due to the first wave spring 2, enabling the first bearing 1 to operate in the best lubrication and rolling state, thereby effectively suppressing the vibration and noise generated during the operation of the female rotor component 3, and effectively improving the service life. When the shaft tail end of the female rotor component 3 rotates, the female rotor bearing 5 can automatically adjust the axial clearance due to the female rotor wave spring 7. The wave deformation of the female rotor wave spring 7 can absorb the local stress of the female rotor component 3 and reduce the axial load on the bearing, thereby alleviating the vibration and impact during operation and reducing the noise. At the same time, using the structure of the female rotor wave spring 7 makes the size compact and requires a small installation space. Similarly, when the male rotor component 4 rotates, the above technical effects can be effectively achieved through the second wave spring 10 and the male rotor wave spring 8.

[0030] Embodiment 2

[0031] Refer to Figure 1 、 Figure 2 and Figure 3, An oil-free screw air compressor with a wave spring structure. In this embodiment compared with the first embodiment, the female rotor bearing 5 includes a bearing inner sleeve 51, bearing rollers 52, a bearing housing 53, and a bearing sleeve cavity 54. A week of bearing rollers 52 is arranged inside the bearing housing 53, a week of bearing inner sleeves 51 is arranged inside the bearing rollers 52, a bearing sleeve cavity 54 is arranged inside the bearing inner sleeve 51, the bearing housing 53 is connected to the oil-free screw air compressor housing 11, and the bearing inner sleeve 51 is connected to the female rotor shaft 31 through the bearing sleeve cavity 54.

[0032] Working principle: The bearing housing 53 of the female rotor bearing 5 is correspondingly sleeved and connected to the oil-free screw air compressor housing 11, so that the bearing housing 53 is convenient for installation and placement. Due to the bearing rollers 52 on the inner side of the bearing housing 53, the bearing inner sleeve 51 can be positioned and rotated. Due to the area of the bearing sleeve cavity 54 of the bearing inner sleeve 51, the female rotor shaft 31 can be positioned, sleeved, and rotated for use.

[0033] Embodiment Three

[0034] Refer to Figure 1 and Figure 5 , An oil-free screw air compressor with a wave spring structure. In this embodiment compared with the second embodiment, the male rotor wave spring 8 includes a wave spring upper wave surface 81, a wave spring body 82, a wave spring lower wave surface 83, and a wave spring middle sleeve hole 84. A wave spring middle sleeve hole 84 is arranged in the middle of the wave spring body 82, a wave spring upper wave surface 81 is arranged on the upper surface of the wave spring body 82, a wave spring lower wave surface 83 is arranged on the lower surface of the wave spring body 82, and the wave spring body 82 is connected to the oil-free screw air compressor housing 11;

[0035] In the present utility model, the first wave spring 2, the second wave spring 10, the female rotor wave spring 7, and the male rotor wave spring 8 have the same shape, so that they can be used corresponding to deformation. The wave deformation can absorb local stress and reduce the axial load of the bearing, so as to play a very good protective role.

[0036] In the present utility model, the sizes of the first wave spring 2 and the second wave spring 10 are OD47×ID38.18×2.44, so that they can be installed and placed correspondingly.

[0037] In the present utility model, the size of the female rotor wave spring 7 is OD80×ID67.49×4.29, and the size of the male rotor wave spring 8 is OD72×ID40.07×4.29. In this way, they can be installed and placed correspondingly and can be adjusted according to needs.

[0038] Working principle: The wave spring body 82 of the male rotor wave spring 8 can effectively reduce the overall weight through the space of the wave spring intermediate sleeve hole 84. The wave spring body 82 can be used corresponding to the deformation through the wave surfaces of the upper wave surface 81 and the lower wave surface 83 of the wave spring.

[0039] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

Claims

1. An oil-free screw air compressor with a wave spring structure, comprising a female rotor component (3), a male rotor component (4) and an oil-free screw air compressor housing (11). The female rotor component (3) is installed and connected at an internal position of the oil-free screw air compressor housing (11), and the male rotor component (4) is arranged outside the female rotor component (3), characterized in that: A first bearing (1) is arranged on the peripheral side of the front end of the female rotor component (3). A first corrugated spring (2) is arranged between the first bearing (1) and the oil-free screw air compressor housing (11). A female rotor bearing (5) is arranged on the peripheral side of the rear end of the female rotor component (3). A female rotor corrugated spring (7) is arranged between the female rotor bearing (5) and the oil-free screw air compressor housing (11). A second bearing (9) is arranged on the peripheral side of the front end of the male rotor component (4). A second corrugated spring (10) is arranged between the second bearing (9) and the oil-free screw air compressor housing (11). A male rotor bearing (6) is arranged on the peripheral side of the rear end of the male rotor component (4). A male rotor corrugated spring (8) is arranged between the male rotor bearing (6) and the oil-free screw air compressor housing (11).

2. The oil-free screw air compressor with a wave spring structure according to claim 1, characterized in that: The male rotor component (4) includes a male rotor shaft rod (41), male rotor blades (42) and an outer shaft sleeve (43). The outer shaft sleeve (43) is arranged on the peripheral side of the male rotor shaft rod (41). The male rotor blades (42) are arranged on the peripheral side of the outer shaft sleeve (43). The rear end of the male rotor shaft rod (41) is connected to the male rotor bearing (6). The front end of the male rotor shaft rod (41) is connected to the second bearing (9).

3. The oil-free screw air compressor with a wave spring structure according to claim 1, characterized in that: The female rotor component (3) includes a female rotor shaft rod (31), a female rotor shaft sleeve (32) and female rotor rotating blades (33). The female rotor shaft sleeve (32) is arranged on the peripheral side of the female rotor shaft rod (31). The female rotor rotating blades (33) are arranged on the peripheral side of the female rotor shaft sleeve (32). The rear end of the female rotor shaft rod (31) is connected to the female rotor bearing (5). The front end of the female rotor shaft rod (31) is connected to the first bearing (1).

4. The oil-free screw air compressor with a wave spring structure according to claim 3, characterized in that: The female rotor bearing (5) includes a bearing inner sleeve (51), bearing rollers (52), a bearing outer shell (53) and a bearing sleeve cavity (54). The bearing rollers (52) are arranged in a circle on the inner part of the bearing outer shell (53). The bearing inner sleeve (51) is arranged in a circle on the inner side of the bearing rollers (52). The bearing sleeve cavity (54) is arranged inside the bearing inner sleeve (51). The bearing outer shell (53) is connected to the oil-free screw air compressor housing (11). The bearing inner sleeve (51) is connected to the female rotor shaft rod (31) through the bearing sleeve cavity (54).

5. The oil-free screw air compressor with a wave spring structure according to claim 1, wherein: The male rotor corrugated spring (8) includes a corrugated spring upper corrugated surface (81), a corrugated spring body (82), a corrugated spring lower corrugated surface (83) and a corrugated spring middle sleeve hole (84). The corrugated spring middle sleeve hole (84) is arranged in the middle inside the corrugated spring body (82). The corrugated spring upper corrugated surface (81) is arranged on the upper surface of the corrugated spring body (82). The corrugated spring lower corrugated surface (83) is arranged on the lower surface of the corrugated spring body (82). The corrugated spring body (82) is connected to the oil-free screw air compressor housing (11).

6. The oil-free screw air compressor with a wave spring structure according to claim 1, characterized in that: The first corrugated spring (2), the second corrugated spring (10), the female rotor corrugated spring (7) and the male rotor corrugated spring (8) have the same shape.

7. The oil-free screw air compressor with a wave spring structure according to claim 6, characterized in that: The dimensions of the first wave spring (2) and the second wave spring (10) are OD47×ID38.18×2.

44.

8. The oil-free screw air compressor with a wave spring structure according to claim 6, characterized in that: The dimensions of the female rotor wave spring (7) are OD80×ID67.49×4.29, and the dimensions of the male rotor wave spring (8) are OD72×ID40.07×4.29.

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