Rotor compressed gas structure and pure oil-free air compressor or vacuum pump formed by same

Abstract

The utility model discloses a rotor compressed gas structure and a pure oil-free air compressor or vacuum pump formed by the rotor compressed gas structure. The rotor compressed gas structure comprises a compression cavity and a triangular rotor. Through the rotation of the triangular rotor, the volume change is formed to generate pressure or vacuum, and the displacement compressor or vacuum pump belongs to a novel displacement compressor or vacuum pump. Annular sealing air grooves are formed in the end faces of the two ends of the triangular rotor, sealing air gaps are formed in the positions, located at the three corners, of the outer surface of the triangular rotor, and meanwhile ventilation holes are formed in the positions, close to the three corners of the triangular rotor, in the air grooves respectively and penetrate through the two ends of the triangular rotor. And the vent holes are communicated with the air gaps. Compared with a common oil-free screw machine in the market, the oil-free screw machine provided by the utility model only compresses air instead of compressing an oil-gas mixture and then separating the oil-gas mixture to form an oil-free state. According to the air compressor, air can be compressed without an oil separation barrel. Meanwhile, the air inlet and outlet are turned to form the vacuum pump.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-free air compressor, in particular to a rotor gas compression structure and a pure oil-free air compressor or vacuum pump formed by the same. BACKGROUND

[0002] The oil-free air compressor is a commonly used device. The existing piston air compressor has problems of large vibration, large noise, large volume and large weight because the piston moves in a reciprocating linear motion in the cylinder. In order to solve the above technical problems, a device using a triangular rotor to rotate in a compression cavity to compress gas is invented. The rotor air compressor cancels the useless linear motion, so that the volume and weight of the rotor air compressor with the same power are smaller, and the vibration and noise are smaller. However, the current triangular rotor air compressor has a problem of wear and tear because of the friction between the three corners of the triangular rotor and the two end faces of the triangular rotor and the end cover. The working mode of the triangular rotor air compressor is to extract and compress gas by high-speed rotation, which causes the wear and tear caused by friction to speed up, resulting in damage of the workpiece due to large wear and tear. SUMMARY

[0003] The present application aims to provide a rotor gas compression structure and a pure oil-free air compressor or vacuum pump formed by the same to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0005] A rotor gas compression structure, comprising a compression cavity and a triangular rotor; the triangular rotor moves eccentrically in the compression cavity, and the surface of the compression cavity is provided with an air inlet hole and an air outlet hole; the two ends of the compression cavity are fixedly connected with end cover A and end cover B by bolts respectively; the thickness of the triangular rotor is equal to the thickness of the compression cavity; the two end faces of the triangular rotor are provided with annular air grooves, and the outer surface of the triangular rotor is provided with air slits at the positions of the three corners; meanwhile, air holes are provided in the air grooves close to the three corners of the triangular rotor, and the air holes penetrate through the two ends of the triangular rotor; the air holes are in communication with the air slits.

[0006] As a further scheme of the present application, the air slit is a trapezoidal hole with a trapezoidal longitudinal section.

[0007] As a further scheme of the present application, the air holes and the air slits are connected by a plurality of pinholes.

[0008] As a further scheme of the present application: the driving mechanism of the triangular rotor comprises an inner ring A, a driving gear, an inner ring B and a driven gear; the inner ring A and the inner ring B are fixedly connected at two ends of the triangular rotor by bolts respectively, the circle of the inner ring A, the center of the inner ring B and the geometric center of the triangular rotor are concentrically arranged, the inner ring B is in meshing connection with the driven gear, the inner ring A is in meshing connection with the driving gear, the hollow shaft integrally formed at the end of the driven gear is fixedly connected on the end cover A, and the hollow shaft integrally formed at the end of the driving gear is rotatably connected in the through hole of the end cover B through the corresponding bearing.

[0009] As a further scheme of the present application: the eccentric shaft structure is arranged between the driving gear and the driven gear.

[0010] As a further scheme of the present application: the eccentric shaft structure comprises a center shaft, a connecting rod A, a connecting rod B, a shaft A and a shaft B, the center shaft is rotatably connected at the geometric center of the triangular rotor through a bearing, the two ends of the center shaft are connected with the shaft A and the shaft B through the connecting rod A and the connecting rod B respectively, the shaft A and the shaft B are coaxially arranged and located outside the geometric center of the triangular rotor; the shaft B is located in the hollow shaft of the driven gear and rotatably connected with the inner wall of the hollow shaft of the driven gear through the corresponding bearing; the shaft A is located in the hollow shaft of the driving gear and connected with the output shaft of the motor through the shaft coupling.

[0011] As a further scheme of the present application: the inlet hole and the outlet hole, the inlet hole of the compression cavity is connected with the inlet one-way valve, and the outlet hole of the compression cavity is connected with the outlet one-way valve.

[0012] In the second aspect, the present application further provides a pure oil-free air compressor or vacuum pump adopting the rotor compression gas structure, which is composed of the above rotor compression gas structure. Through the rotation of the triangular rotor, the change of the volume forms the pressure or vacuum, which is applied to the air pipeline of medical treatment and electric vehicles.

[0013] Compared with the prior art, the present application has the following beneficial effects: the triangular rotor is improved and the through air hole is arranged on the triangular rotor, so that the air pressure of the rotor end face can be balanced, the pressure is increased through the change of the size and volume of the air hole, the air flow overflowing from the high-pressure area can form a higher pressure air curtain between the triangular rotor and the end cover, and the sealing effect is formed to avoid the friction between the triangular rotor end face and the end cover during rotation; through the new sealing mode, the influence on the service life caused by friction is avoided.

[0014] By arranging the air slit in communication with the air hole on the outer surface of the triangular rotor and at the positions of the three corners, the air curtain is also formed between the triangular rotor and the inner surface of the compression cavity, so as to reduce the friction between the triangular rotor and the inner wall of the compression cavity, thereby reducing the abrasion and weakening the vibration, and the service life is relatively improved.

[0015] The present application can realize multiple compression, has small structure, is suitable for multiple fields, medical dental cleaning equipment, sensor of electric vehicle, and has the advantages of reducing energy consumption.

[0016] The rotor rotates around its center and moves around the circular contour, so that the volume changes to achieve compression or vacuum; the difference between it and the commonly used oil-free screw machine on the market is that only air is compressed, not through the separation of oil-gas mixture to form oil-free air. The air compressor is oil-free, and only air is compressed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Explosive schematic diagram of the rotor compression gas structure.

[0018] Figure 2 Schematic diagram of the rotor compression gas structure.

[0019] Figure 3 Schematic diagram of the internal three-dimensional structure of the rotor compression gas structure.

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the rotor in the rotor compression gas structure.

[0021] Figure 5 Schematic diagram of the end face of the rotor in the rotor compression gas structure.

[0022] Figure 6 Schematic diagram of Figure 5 Another cross-sectional view in the A-A direction.

[0023] Figure 7 Schematic diagram of the rotor and its transmission structure in the rotor compression gas structure.

[0024] Figure 8 Schematic diagram of the air inlet hole and air outlet hole position in the rotor compression gas structure.

[0025] Figure 9 Schematic diagram of Figure 5 Another cross-sectional view in the A-A direction.

[0026] Figure 10 Air compressor using the rotor compression gas structure; DETAILED DESCRIPTION

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application. Embodiment 1

[0028] Please refer to Figures 1-7 In the embodiments of the present application, a rotor compression gas structure includes an end cover A1, a compression cavity 2, a triangular rotor 3, an inner gear ring A6, a driving gear 10, an end cover B9, an inner gear ring B11 and a driven gear 14. The triangular rotor 3 performs eccentric motion in the compression cavity 2, and the volume change caused by the motion of the triangular rotor 3 in the compression cavity 2 achieves compression or vacuum pumping. The surface of the compression cavity 2 is provided with an air inlet hole 19 and an air outlet hole 20, and the air inlet hole and the air outlet hole are oppositely arranged. The two ends of the compression cavity 2 are fixedly connected to one end of the end cover A1 and one end of the end cover B9 by bolts respectively. The thickness of the triangular rotor 3 is equal to the thickness of the compression cavity 2.

[0029] The two end faces of the triangular rotor 3 are provided with annular air grooves 16. The outer surface of the triangular rotor 3 is provided with air slits 15 at the positions of the three corners. Meanwhile, air holes 17 are arranged in the air grooves 16 close to the three corners of the triangular rotor 3, and the air holes 17 penetrate through the two ends of the triangular rotor 3. The air holes 17 are in communication with the air slits 15.

[0030] The air slit 15 is a trapezoidal hole with a longitudinal section being a trapezoid (for example, Figure 5 The small hole end of the trapezoidal hole faces the air hole 17.

[0031] When the triangular rotor 3 rotates at a high speed, the gas in the compression area enters the air groove 16 from the gap between the end cover (A1 and B9) and the end face of the triangular rotor 3. When the air pressure in the air groove 16 rises to a certain degree, the gas in the high-pressure area overflows from the low-pressure area. The gas flow between the end cover and the triangular rotor 3 forms a gas seal. The air hole 17 of the air cylinder balances the air pressure at the two ends of the triangular rotor 3, and the gas flow overflowing from the air slit 15 can reduce the friction between the three corners of the triangular rotor 3 and the inner surface of the compression cavity 2, thereby achieving the effect of aerodynamic lubrication and realizing pure oil-free.

[0032] The above-mentioned gas fills the gap between the triangular rotor 3, the compression cavity 2, the end cover A1 and the end cover B9, so that the friction in the relative movement process is reduced to a minimum, thereby improving the service life.

[0033] It should be noted that the gap between the triangular rotor 3, the compression cavity 2, the end cover A1 and the end cover B9 is inevitable in the machining process, and the characteristics of gas molecules can enter any gap according to the pressure relationship.

[0034] The driving mechanism adopted by the triangular rotor 3 includes an inner gear ring A6, a driving gear 10, an inner gear ring B11 and a driven gear 14; the inner gear ring A6 and the inner gear ring B11 are fixedly connected at both ends of the triangular rotor 3 by bolts, the center of the circle of the inner gear ring A6, the center of the circle of the inner gear ring B11 and the geometric center of the triangular rotor 3 are concentrically arranged, the inner gear ring B11 is connected with the driven gear 14 in meshing, the inner gear ring A6 is connected with the driving gear 10 in meshing, the hollow shaft integrally formed at the end of the driven gear 14 is fixedly connected at the through hole of the end cover A1, and the hollow shaft integrally formed at the end of the driving gear 10 is rotatably connected in the through hole of the end cover B9 through the corresponding bearing.

[0035] The other end of the end cover A1 is fixedly connected with a sealing cover A23 at the through hole formed thereon by bolts; the other end of the end cover B9 is fixedly connected with a sealing cover B24 at the through hole formed thereon by bolts, and a through hole for the hollow shaft is formed in the sealing cover B24.

[0036] In order to ensure the sealing, a mechanical seal ring 25 is arranged between the inner wall of the through hole of the end cover B9 for the hollow shaft and the corresponding hollow shaft, and a shaft sleeve 26 is arranged between the mechanical seal ring 25 and the inner wall of the corresponding hollow shaft.

[0037] In order to further improve the stability and reduce the rotation, an eccentric shaft structure is arranged between the driving gear 10 and the driven gear 14, the eccentric shaft structure includes a center shaft 4, a connecting rod A7, a connecting rod B12, a shaft A8 and a shaft B13, the center shaft 4 is rotatably connected with the geometric center of the triangular rotor 3 through a bearing 5, the two ends of the center shaft 4 are connected with the shaft A8 and the shaft B13 through the connecting rod A7 and the connecting rod B12 respectively, the shaft A8 and the shaft B13 are coaxially arranged, and the shaft A8 and the shaft B13 are located outside the geometric center of the triangular rotor 3.

[0038] Mechanical seal rings 25 are arranged at the two ends of the bearing of the center shaft 4, and the mechanical seal rings 25 are also sleeved on the shaft sleeves arranged on the center shaft 4;

[0039] The shaft B13 is located in the hollow shaft of the driven gear 14, and the shaft B13 and the inner wall of the hollow shaft of the driven gear 14 are rotatably connected through the corresponding bearing 5, and the corresponding mechanical seal ring 25 is further arranged between the shaft B13 and the inner wall of the hollow shaft of the driven gear 14.

[0040] The shaft A8 is located in the hollow shaft of the driving gear 10, and a corresponding mechanical seal ring 25 is arranged between the shaft A8 and the inner wall of the hollow shaft of the driving gear 10. The shaft A8 is connected to the output shaft of the motor through a shaft coupling, so as to drive the eccentric shaft structure to rotate, and further drive the triangular rotor 3 to rotate in the compression cavity 2. At the same time, since the driving gear and the driven gear are engaged with the corresponding inner tooth ring A6 and inner tooth ring B11, the triangular rotor 3 can rotate stably, that is, when the whole of the triangular rotor 3 and the eccentric shaft structure rotates eccentrically, the triangular rotor 3 can also be stably controlled to rotate by the cooperation of the driving gear, the driven gear, the inner tooth ring A6 and the inner tooth ring B11, so as to reduce noise and improve the effect of rotation stability. Embodiment 2

[0041] As Figure 8 , the air vent hole 17 is connected with the air slit 15 through a plurality of pinholes 18. The pinhole 18 is a through hole cut by electric arc, which further increases the pressure of the ejected air curtain. This structure is more cost-effective. A pressure sensor and a temperature sensor are appropriately selected and matched to match the application scene. Embodiment 3

[0042] As Figure 9 , the air inlet hole 19 and the air outlet hole 20, the air inlet hole of the compression cavity 2 is connected with the air inlet one-way valve 22, and the air outlet hole 20 of the compression cavity 2 is connected with the air outlet one-way valve 21.

[0043] The triangular rotor 3 rotates in the compression cavity 2. Whenever an angle of the triangular rotor 3 passes through the air inlet hole 19, the space in the direction of the air outlet hole of the angle can realize compression of air in the reverse direction of rotation of the triangular rotor, and then the air is discharged from the air outlet hole, so as to realize air inlet and air outlet in a cycle. That is, through the rotation of the triangular rotor, the change of volume is formed to generate pressure or vacuum at the air outlet hole 20 and the air inlet hole 19, so as to constitute a pure oil-free air compressor or vacuum pump.

[0044] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor compression gas structure, comprising a compression cavity (2) and a triangular rotor (3), the triangular rotor (3) making eccentric motion in the compression cavity (2), the surface of the compression cavity (2) being provided with an air inlet hole (19) and an air outlet hole (20); the two ends of the compression cavity (2) are fixedly connected with an end cover A (1) and an end cover B (9) respectively through bolts; the thickness of the triangular rotor (3) is equal to the thickness of the compression cavity (2), characterized in that, The annular air groove (16) is arranged on the end surface of the triangular rotor (3), the air slit (15) is arranged on the outer surface of the triangular rotor (3) at the position of the three corners, and the air vent hole (17) is arranged in the air groove (16) and close to the three corners of the triangular rotor (3), and the air vent hole (17) penetrates through the two ends of the triangular rotor (3); the air vent hole (17) is communicated with the air slit (15).

2. The rotor compressed gas structure of claim 1, wherein, The air slit (15) is a trapezoidal hole with a trapezoidal longitudinal section.

3. The rotor compressed gas structure of claim 1, wherein, The air vent hole (17) is connected with the air slit (15) through a plurality of pinholes (18).

4. The rotor compression gas structure of claim 1, 2, or 3, wherein, The driving mechanism of the triangular rotor (3) comprises an inner gear ring A (6), a driving gear (10), an inner gear ring B (11) and a driven gear (14); the inner gear ring A (6) and the inner gear ring B (11) are fixedly connected on the two ends of the triangular rotor (3) by bolts, the center of the circle of the inner gear ring A (6), the center of the circle of the inner gear ring B (11) and the geometric center of the triangular rotor (3) are concentrically arranged, the inner gear ring B (11) is connected with the driven gear (14) in meshing mode, the inner gear ring A (6) is connected with the driving gear (10) in meshing mode, the hollow shaft integrally formed at the end of the driven gear (14) is fixedly connected on the end cover A (1), and the hollow shaft integrally formed at the end of the driving gear (10) is rotatably connected in the through hole of the end cover B (9) through the corresponding bearing.

5. The rotor compressed gas structure of claim 4, wherein, The eccentric shaft structure is arranged between the driving gear (10) and the driven gear (14).

6. The rotor compression gas structure of claim 5, wherein, The eccentric shaft structure comprises a center shaft (4), a connecting rod A (7), a connecting rod B (12), a shaft A (8) and a shaft B (13), the center shaft (4) is rotatably connected at the geometric center of the triangular rotor (3) through the bearing (5), the two ends of the center shaft (4) are connected with the shaft A (8) and the shaft B (13) through the connecting rod A (7) and the connecting rod B (12) respectively, the shaft A (8) and the shaft B (13) are coaxially arranged, and the shaft A (8) and the shaft B (13) are located outside the geometric center of the triangular rotor (3); the shaft B (13) is located in the hollow shaft of the driven gear (14), and the shaft B (13) and the inner wall of the hollow shaft of the driven gear (14) are rotatably connected through the corresponding bearing (5); the shaft A (8) is located in the hollow shaft of the driving gear (10), and the shaft A (8) is connected with the output shaft of the motor through the shaft coupling.

7. The rotor compression gas structure of claim 6, wherein, The air inlet hole (19) and the air outlet hole (20) are connected with the air inlet one-way valve (22) and the air outlet one-way valve (21) respectively.

8. A pure oil-free air compressor or vacuum pump employing a rotor compression gas structure, characterized by, The rotor compression gas structure of any one of claims 1 to 7 is formed, the volume change is formed by the rotation of the triangular rotor to generate pressure or vacuum, and is applied to the air pipeline of medical treatment and electric vehicle. The rotor compression gas structure of any one of claims 1 to 7 is formed, the volume change is formed by the rotation of the triangular rotor to generate pressure or vacuum, and is applied to the air pipeline of medical treatment and electric vehicle.

Images