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

Abstract

The invention 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 invention 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 invention relates to the technical field of oil-free air compressors, in particular to a rotor gas compression structure and a pure oil-free air compressor or vacuum pump composed thereof. Background Art

[0002] Oil-free air compressor is a commonly used equipment. The existing piston air compressor has the problems of large vibration, large noise, large size and large weight due to the reciprocating linear motion of the piston in the cylinder. In order to solve the above technical problems, people have invented a device that uses a triangular rotor to circulate and rotate in a compression chamber to compress the gas. This rotor air compressor eliminates the useless linear motion, so the rotor air compressor of the same power has a smaller size and weight, and less vibration and noise. However, the current triangular rotor air compressor has the problem of wear, because there is friction between the three corners of the triangular rotor and the two end surfaces of the triangular rotor and the end cover, and the working mode of the triangular rotor air compressor is to extract and compress the gas through high-speed rotation. The high-speed rotation method leads to accelerated wear caused by friction, causing damage to the workpiece due to greater wear. Summary of the invention

[0003] The object of the present invention is to provide a rotor compressed gas structure and a pure oil-free air compressor or vacuum pump composed of the same, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A rotor compresses gas structure, comprising a compression chamber and a triangular rotor; the triangular rotor performs eccentric motion in the compression chamber, and an air inlet and an air outlet are provided on the surface of the compression chamber; the two ends of the compression chamber are respectively fixedly connected to an end cover A and an end cover B by bolts; the thickness of the triangular rotor is equal to the thickness of the compression chamber; annular air grooves are provided on the end faces of both ends of the triangular rotor, and air gaps are provided at the positions of the three corners of the outer surface of the triangular rotor, and air holes are respectively provided in the air grooves near the three corners of the triangular rotor, and the air holes run through the two ends of the triangular rotor; the air holes are connected to the air gaps.

[0005] As a further solution of the present invention: the air gap is a trapezoidal hole with a trapezoidal longitudinal cross section.

[0006] As a further solution of the present invention: the vent hole and the air gap are connected via a plurality of pinholes.

[0007] As a further solution of the present invention: the driving mechanism adopted by the triangular rotor includes an inner gear ring A, a driving gear, an inner gear ring B and a driven gear; the inner gear ring A and the inner gear ring B are respectively fixedly connected to the two ends of the triangular rotor by bolts, the circle of the inner gear ring A, the center of the circle of the inner gear ring B and the geometric center of the triangular rotor are concentrically arranged, the inner gear ring B is meshedly connected to the driven gear, the inner gear ring A is meshedly connected to the driving gear, the driven gear is fixedly connected to the end cover A through a hollow shaft integrally formed at its end, and the hollow shaft integrally formed at the end of the driving gear is rotatably connected to the corresponding through hole opened on the end cover B through a corresponding bearing.

[0008] As a further solution of the present invention: an eccentric shaft structure is arranged between the driving gear and the driven gear.

[0009] As a further solution of the present invention: the eccentric shaft structure includes a central shaft, a connecting rod A, a connecting rod B, an axis A and an axis B. The geometric center of the triangular rotor is rotatably connected to the central shaft through a bearing. The two ends of the central shaft are respectively connected to the axis A and the axis B through the connecting rod A and the connecting rod B. The axis A and the axis B are coaxially arranged, and the axis A and the axis B are located outside the geometric center of the triangular rotor; the axis B13 is located in the hollow shaft of the driven gear 14, and the axis B13 is rotatably connected to the inner wall of the hollow shaft of the driven gear 14 through the corresponding bearing 15; the axis A8 is located in the hollow shaft of the driving gear 10, and the axis A8 is connected to the output shaft of the motor through a coupling.

[0010] As a further solution of the present invention: the air inlet and the air outlet, the air inlet of the compression chamber is connected to the air inlet check valve, and the air outlet of the compression chamber is connected to the air outlet check valve.

[0011] In a second aspect, the present invention also provides a pure oil-free air compressor or vacuum pump using a rotor-compressed gas structure, which is composed of the above-mentioned rotor-compressed gas structure. The rotation of the triangular rotor forms a change in volume to generate pressure or vacuum.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by improving the triangular rotor and providing a through vent hole on the triangular rotor, the air pressure on the rotor end face can be connected and balanced, and the pressure is increased by changing the size and volume of the vent hole, so that the airflow overflowing from the high-pressure area can form a higher-pressure air curtain between the triangular rotor and the end cover, forming a sealing effect to avoid friction between the triangular rotor end face and the end cover during rotation; through a new sealing method, the influence of friction on the service life is avoided.

[0013] By opening air gaps connected to the vents on the outer surface of the triangular rotor and at the three corners, an air curtain is formed between the triangular rotor and the inner surface of the compression chamber, thereby reducing the friction between the triangular rotor and the inner wall of the compression chamber, reducing wear and vibration, and relatively increasing the service life.

[0014] The invention can realize multiple compression, has a small structure, and is applicable to multiple fields, such as medical tooth cleaning equipment and sensors of electric vehicles, and has the advantage of reducing energy consumption.

[0015] The rotor of the present invention rotates around its own center and moves around the circular contour, thereby generating a change in volume to achieve compression or vacuuming; the difference between it and the commonly used oil-free screw compressors on the market is that it only compresses air, rather than first generating an oil-gas mixture and then separating the oil-air mixture to form an oil-free air compressor. This air compressor has no oil separation barrel and only compresses the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the explosion of the rotor compression gas structure.

[0017] Figure 2 Schematic diagram of the rotor compressing gas structure.

[0018] Figure 3 Schematic diagram of the internal three-dimensional structure of the rotor compression gas structure.

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the rotor in the rotor compression gas structure.

[0020] Figure 5 This is a schematic diagram of the end face of the rotor in the rotor compression gas structure.

[0021] Figure 6 for Figure 4 Schematic diagram of the cross section along the AA direction.

[0022] Figure 7 This is a schematic diagram of the rotor and its transmission structure in the rotor compression gas structure.

[0023] Figure 8 Schematic diagram of the locations of the air inlet and outlet holes in the rotor compression gas structure.

[0024] Fig. 9 for Figure 4 Another cross-sectional diagram in the AA direction.

[0025] Fig.10 An air compressor that uses a rotor to compress gas; DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention. Example

[0027] See also Figures 1 to 7 In an embodiment of the present invention, a rotor compression gas structure includes an end cover A1, a compression chamber 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 chamber 2, and compression or vacuuming is achieved through the volume change generated by the movement of the triangular rotor 3 in the compression chamber 2, and an air inlet 19 and an air outlet 20 are provided on the surface of the compression chamber 2, and the air inlet and the air outlet are arranged oppositely; the two ends of the compression chamber 2 are respectively fixedly connected to one end of the end cover A1 and one end of the end cover B9 by bolts; the thickness of the triangular rotor 3 is equal to the thickness of the compression chamber 2; The two end surfaces of the triangular rotor 3 are provided with annular air grooves 16, and the outer surface of the triangular rotor 3 is provided with air gaps 15 at the three corners. At the same time, the air grooves 16 are provided with air vents 17 at the positions close to the three corners of the triangular rotor 3, respectively. The air vents 17 run through the two ends of the triangular rotor 3; the air vents 17 are connected with the air gaps 15; The air gap 15 is a trapezoidal hole with a trapezoidal longitudinal cross section (such as Figure 5 ), the small hole end of the trapezoidal hole faces the vent hole 17.

[0028] Its working principle is that when the triangular rotor 3 rotates at a high speed, the gas in the compression area enters into the air groove 16 from the gap between the end cover (A1 and B9) and the end face of the triangular rotor 3. After the air pressure in the air groove 16 increases to a certain level, it overflows from the low-pressure area. The air flow entering the end cover and the triangular rotor 3 in the high-pressure area and the air flow overflowing from the end cover and the triangular rotor 3 form an air seal; the air cylinder vent 17 balances the air pressure at both ends of the triangular rotor 3, and the air flow overflowing from the air gap 15 can reduce the friction between the triangle of the triangular rotor 3 and the inner surface of the compression chamber 2, thereby achieving the effect of pneumatic lubrication and achieving pure oil-free.

[0029] The gas fills the gaps between the triangular rotor 3, the compression chamber 2, the end cover A1 and the end cover B9, thereby reducing the friction to a minimum during the relative movement, thereby increasing the service life.

[0030] It should be noted that the gaps among the triangular rotor 3, the compression chamber 2, the end cover A1 and the end cover B9 are inevitably generated during the machining process, and the characteristics of gas molecules can allow them to enter any gap according to the pressure relationship.

[0031] 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 respectively fixedly connected to the two ends of the triangular rotor 3 by bolts, and the circle of the inner gear ring A6, the center of the inner gear ring B11 and the geometric center of the triangular rotor 3 are concentrically arranged, the inner gear ring B11 is meshedly connected to the driven gear 14, the inner gear ring A6 is meshedly connected to the driving gear 10, and the driven gear 14 is fixedly connected to the through hole opened on the end cover A1 through the hollow shaft integrally formed at the end thereof, and the hollow shaft integrally formed at the end of the driving gear 10 is rotatably connected to the corresponding through hole opened on the end cover B9 through the corresponding bearing.

[0032] The other end of the end cover A1 is located at the through hole opened thereon and is fixedly connected to the sealing cover A23 by bolts; the other end of the end cover B9 is located at the through hole opened thereon and is fixedly connected to the sealing cover B24 by bolts, and the sealing cover B24 has a through hole for the hollow shaft to pass through.

[0033] In order to ensure sealing, a mechanical seal ring 25 is arranged between the inner wall of the through hole on the end cover B9 for the hollow shaft to pass through 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.

[0034] In order to further improve stability and reduce rotation, an eccentric shaft structure is added between the driving gear 10 and the driven gear 14. The eccentric shaft structure includes a central shaft 4, a connecting rod A7, a connecting rod B12, an axis A8 and an axis B13. The geometric center of the triangular rotor 3 is rotatably connected to the central shaft 4 through a bearing 5. The two ends of the central shaft 4 are respectively connected to the axis A8 and the axis B13 through the connecting rod A7 and the connecting rod B12. The axis A8 and the axis B13 are coaxially arranged, and the axis A8 and the axis B13 are located outside the geometric center of the triangular rotor 3.

[0035] The two ends of the central shaft 4 on which the upper bearing is located are provided with mechanical seal rings 25, and the mechanical seal rings 25 are also sleeved on the shaft sleeves provided on the central shaft 4; 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 via a corresponding bearing 15 , and a corresponding mechanical seal ring 25 is also provided between the shaft B13 and the inner wall of the hollow shaft of the driven gear 14 .

[0036] 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 coupling, thereby driving the eccentric shaft structure to rotate, and then driving the triangular rotor 3 to rotate in the compression chamber 2; at the same time, since the driving gear and the driven gear are meshed at the corresponding inner gear ring A6 and the inner gear ring B11, the triangular rotor 3 can rotate on its own, that is, when the triangular rotor 3 and the eccentric shaft structure as a whole are eccentrically rotating, the triangular rotor 3 can also be stably controlled to rotate on its own by the cooperation of the driving gear, the driven gear, the inner gear ring A6 and the inner gear ring B11, thereby reducing noise and improving the rotation stability. Example

[0037] like Figure 8 The vent hole 17 is connected to the air gap 15 through a plurality of pinholes 18. The pinholes 18 are through holes cut by electric arcs, which further increase the pressure of the ejected air curtain. This structure is cheaper. The pressure sensor and temperature sensor are appropriately selected to match the appropriate application scenario. Example

[0038] like Fig. 9 , an air inlet 19 and an air outlet 20, the air inlet of the compression chamber 2 is connected to an air inlet check valve 22, and the air outlet 20 of the compression chamber 2 is connected to an air outlet check valve 21; The triangular rotor 3 rotates in the compression chamber 2. Whenever one corner of the triangular rotor 3 passes over the air inlet 19, the space from the corner to the air outlet in the opposite direction of the triangular rotor can compress the air and then discharge it from the air outlet, so that the air intake and exhaust are realized in a reciprocating cycle. That is, through the rotation of the triangular rotor, the volume changes and pressure or vacuum is generated at the air outlet 20 and the air inlet 19, so as to form a pure oil-free air compressor or vacuum pump.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotor gas compression structure, comprising a compression chamber (2) and a triangular rotor (3), wherein the triangular rotor (3) performs eccentric motion in the compression chamber (2), and an air inlet (19) and an air outlet (20) are provided on the surface of the compression chamber (2); the two ends of the compression chamber (2) are respectively fixedly connected to an end cover A (1) and an end cover B (9) by bolts; the thickness of the triangular rotor (3) is equal to the thickness of the compression chamber (2), and the characteristics are as follows: Annular air grooves (16) are provided on the end surfaces of both ends of the triangular rotor (3); air slits (15) are provided on the outer surface of the triangular rotor (3) at three corners; and air holes (17) are provided in the air grooves (16) at positions close to the three corners of the triangular rotor (3); the air holes (17) run through the two ends of the triangular rotor (3); and the air holes (17) are in communication with the air slits (15).

2. The rotor compressed gas structure according to claim 1, characterized in that: The air gap (15) is a trapezoidal hole with a trapezoidal longitudinal cross section.

3. The rotor compressed gas structure according to claim 1, characterized in that: The vent hole (17) is connected to the air gap (15) via a plurality of pinholes (18).

4. The rotor compressed gas structure according to claim 1, 2 or 3, characterized in that: The driving mechanism adopted by 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 respectively fixedly connected to the two ends of the triangular rotor (3) by bolts, 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 meshedly connected to the driven gear (14), the inner gear ring A (6) is meshedly connected to the driving gear (10), the driven gear (14) is fixedly connected to the end cover A (1) through a hollow shaft integrally formed at its end, and the hollow shaft integrally formed at the end of the driving gear (10) is rotatably connected to a corresponding through hole opened on the end cover B (9) through a corresponding bearing.

5. The rotor compressed gas structure according to claim 4, characterized in that: An eccentric shaft structure is arranged between the driving gear (10) and the driven gear (14).

6. The rotor compressed gas structure according to claim 5, characterized in that: The eccentric shaft structure comprises a central shaft (4), a connecting rod A (7), a connecting rod B (12), a shaft A (8) and a shaft B (13); the geometric center of the triangular rotor (3) is rotatably connected to the central shaft (4) via a bearing (5); the two ends of the central shaft (4) are respectively connected to the shaft A (8) and the shaft B (13) via the connecting rod A (7) and the connecting rod B (12); 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) is rotatably connected to the inner wall of the hollow shaft of the driven gear (14) via a corresponding bearing (15); the shaft A (8) is located in the hollow shaft of the driving gear (10), and the shaft A (8) is connected to the output shaft of the motor via a coupling.

7. The rotor compressed gas structure according to claim 6, characterized in that: The air inlet (19) and the air outlet (20), the air inlet of the compression chamber (2) is connected to an air inlet check valve (22), and the air outlet (20) of the compression chamber (2) is connected to an air outlet check valve (21).

8. A pure oil-free air compressor or vacuum pump using a rotor-compressed gas structure, characterized in that: The invention is composed of the rotor compressed gas structure as described in any one of claims 1 to 7, and the volume change is formed by the rotation of the triangular rotor to generate pressure or vacuum, and is applied to the air pipelines of medical treatment and electric vehicles.

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