CN223854444U

CN223854444U - Rotor compressed gas structure and pure oilless air compressor or vacuum pump formed by same

Info

Publication number: CN223854444U
Application number: CN202520595765.8U
Authority: CN
Inventors: 牛德春
Original assignee: Individual
Current assignee: Individual
Priority date: 2025-04-01
Filing date: 2025-04-01
Publication date: 2026-01-30
Anticipated expiration: 2035-04-01

Abstract

The utility model discloses a rotor compressed gas structure and a pure oil-free air compressor or a vacuum pump formed by the same, which comprise a compression cavity and a triangular rotor, wherein pressure or vacuum is generated by the change of volumes formed by the rotation of the triangular rotor, and the rotor compressed gas structure belongs to a brand new type of positive 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 slits are formed in the positions, located at the three corners, of the outer surface of the triangular rotor, air holes are formed in the positions, close to the three corners of the triangular rotor, of the air grooves, the air holes penetrate through the two ends of the triangular rotor, and the air holes are communicated with the air slits. The difference between the present utility model and the oil-free screw machines commonly used in the market is that only air is compressed, rather than oil-free being formed by compressing the oil-gas mixture and then separating the oil-gas mixture. The air compressor can compress air without an oil barrel. And the transfer air inlet and the transfer air outlet are vacuum pumps.

Description

Rotor compressed gas structure and pure oilless air compressor or vacuum pump formed by same

Technical Field

The invention relates to the technical field of oil-free air compressors, in particular to a rotor compressed gas structure and a pure oil-free air compressor or a vacuum pump formed by the rotor compressed gas structure.

Background

The oil-free air compressor is a relatively common device, the existing piston air compressor has the problems of large vibration, large noise, large volume and large weight because the piston reciprocates in the cylinder, in order to solve the technical problems, a device for circularly rotating compressed air in a compression cavity by adopting a triangular rotor is invented, the rotor air compressor cancels useless linear motion, therefore, the rotor air compressor with the same power has smaller volume and weight and smaller vibration and noise, but the existing triangular rotor air compressor has the problem of abrasion because of three corners of a triangular rotor and friction between two end surfaces of the triangular rotor and an end cover, the working mode of the triangular rotor air compressor is to realize the extraction and compression of air by high-speed rotation, the abrasion caused by friction is accelerated by the high-speed rotation mode, and workpieces are damaged by larger abrasion.

Disclosure of Invention

The invention aims to provide a rotor compressed gas structure and a pure oil-free air compressor or a vacuum pump formed by the rotor compressed gas structure, so as to solve the problems in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A rotor compressed gas structure comprises a compression cavity and a triangular rotor, wherein the triangular rotor eccentrically moves in the compression cavity, an air inlet hole and an air outlet hole are formed in the surface of the compression cavity, two ends of the compression cavity are fixedly connected with an end cover A and an end cover B through bolts respectively, the thickness of the triangular rotor is equal to that of the compression cavity, annular air grooves are formed in the end faces of the two ends of the triangular rotor, air slits are formed in the outer surfaces of the triangular rotor at three angles, air vents are formed in the positions, close to the three angles of the triangular rotor, of the air grooves, and penetrate through the two ends of the triangular rotor, and the air vents are communicated with the air slits.

As a further scheme of the invention, the air gap is a trapezoid hole with a trapezoid longitudinal section.

As a further scheme of the invention, the vent holes are connected with the air slits through a plurality of pinholes.

The driving mechanism adopted by the triangular rotor comprises an annular gear A, a driving gear, an annular gear B and a driven gear, wherein the annular gear A and the annular gear B are fixedly connected to two ends of the triangular rotor through bolts respectively, the circle of the annular gear A, the circle center of the annular gear B and the geometric center of the triangular rotor are concentrically arranged, the annular gear B is in meshed connection with the driven gear, the annular gear A is in meshed connection with the driving gear, the driven gear is fixedly connected to the end cover A through a hollow shaft with the end part integrally formed, and the hollow shaft with the end part integrally formed of the driving gear is rotatably connected to a through hole correspondingly formed in the end cover B through a corresponding bearing.

As a further scheme of the invention, an eccentric shaft structure is arranged between the driving gear and the driven gear.

The eccentric shaft structure comprises a central shaft, a connecting rod A, a connecting rod B, a shaft A and a shaft B, wherein the geometric center of the triangular rotor is rotationally connected with the central shaft through a bearing, two ends of the central shaft are respectively connected with the shaft A and the shaft B through the connecting rod A and the connecting rod B, the shaft A and the shaft B are coaxially arranged, the shaft A and the shaft B are positioned outside the geometric center of the triangular rotor, the shaft B is positioned in a hollow shaft of the driven gear, the shaft B is rotationally connected with the inner wall of the hollow shaft of the driven gear through a corresponding bearing, the shaft A is positioned in the hollow shaft of the driving gear, and the shaft A is connected with an output shaft of a motor through a coupler.

As a further scheme of the invention, the air inlet hole and the air outlet hole are connected with the air inlet one-way valve, and the air outlet hole of the compression cavity is connected with the air outlet one-way valve.

In a second aspect, the invention also provides a pure oil-free air compressor or a vacuum pump adopting the rotor compressed gas structure, which consists of the rotor compressed gas structure. The triangular rotor rotates to form the change between volumes to generate pressure or vacuum, and the pressure or vacuum is applied to air pipelines of medical and electric automobiles.

Compared with the prior art, the novel rotary triangular rotor has the advantages that through improvement of the triangular rotor and the arrangement of the through vent holes in the triangular rotor, air pressure on the end face of the rotor can be communicated and balanced, pressure is increased through the change of the size and the volume of the vent holes, air flow overflowing from a high-pressure area can form a higher-pressure air curtain between the triangular rotor and the end cover, a sealing effect is achieved, friction between the end face of the triangular rotor and the end cover during rotation is avoided, and the influence on the service life due to friction is avoided through a brand new sealing mode.

By arranging the air slits communicated with the air holes on the outer surface of the triangular rotor and the positions at the three corners, an air curtain is formed between the triangular rotor and the inner surface of the compression cavity, so that friction between the triangular rotor and the inner wall of the compression cavity is reduced, abrasion is reduced, vibration is weakened, and service life is relatively prolonged.

The invention can realize multiple compression, has smaller structure, and is suitable for a plurality of fields, medical tooth cleaning equipment and sensors of electric automobiles. Reducing energy consumption.

The rotor of the invention rotates around the center of the rotor and moves around the circular outline, thereby generating volume change to compress or vacuumize, and the difference between the rotor and the oil-free screw machine commonly used in the market is that only air is compressed, rather than oil-free oil is formed by firstly generating an oil-gas mixture and then separating the oil-gas mixture. The air compressor has no oil separation barrel, and only compresses air.

Drawings

FIG. 1 is an exploded schematic view of a rotor compressed gas structure.

Fig. 2 is a schematic diagram of a rotor compressed gas configuration.

Fig. 3 is a schematic internal perspective view of a rotor compressed gas structure.

Fig. 4 is a schematic perspective view of a rotor in a rotor compressed gas structure.

Fig. 5 is an end view schematic of a rotor in a rotor compressed gas configuration.

Fig. 6 is a schematic cross-sectional view taken along the direction A-A in fig. 5.

Fig. 7 is a schematic view of a rotor and its transmission structure in a rotor compressed gas structure.

FIG. 8 is a schematic illustration of the positions of the inlet and outlet holes in a rotor compressed gas structure.

Fig. 9 is another schematic cross-sectional view taken along the direction A-A in fig. 5.

FIG. 10 is an air compressor employing a rotor compressed gas configuration;

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-7, in the embodiment of the invention, a rotor compressed gas structure comprises an end cover A1, a compression cavity 2, a triangular rotor 3, an annular gear A6, a driving gear 10, an end cover B9, an annular gear B11 and a driven gear 14, wherein the triangular rotor 3 eccentrically moves in the compression cavity 2, and compresses or vacuumizes through volume change generated by the movement of the triangular rotor 3 in the compression cavity 2, an air inlet hole 19 and an air outlet hole 20 are formed in the surface of the compression cavity 2, and the air inlet hole and the air outlet hole are oppositely arranged, and two ends of the compression cavity 2 are respectively fixedly connected with one end of the end cover A1 and one end of the end cover B9 through bolts;

Annular air grooves 16 are formed in the end faces of the two ends of the triangular rotor 3, air slits 15 are formed in the positions, located at three corners, of the outer surface of the triangular rotor 3, air holes 17 are formed in the positions, close to the three corners of the triangular rotor 3, of the air grooves 16 respectively, and the air holes 17 penetrate through the two ends of the triangular rotor 3;

The air gap 15 is a trapezoid hole (as shown in fig. 5) with a trapezoid longitudinal section, and the small hole end of the trapezoid hole faces the vent hole 17.

The working principle of the pneumatic air cylinder device is that when the triangular rotor 3 rotates at high height, air in a compression area enters an air groove 16 from a gap between an end cover (A1 and B9) and the end face of the triangular rotor 3, air pressure in the air groove 16 rises to a certain degree and overflows from a low-pressure area, air flow entering the end cover and the triangular rotor 3 in a high-pressure area and air flow overflowing between the end cover and the triangular rotor 3 form an air seal, air cylinder ventilation holes 17 balance the air pressure at two ends of the triangular rotor 3, and the air flow overflowing from the air gaps 15 can reduce friction between the triangular rotor 3 and the inner surface of the compression cavity 2, so that pneumatic lubrication effect is achieved, and pure oilless is realized.

The gas fills gaps among the triangular rotor 3, the compression cavity 2, the end cover A1 and the end cover B9, so that friction in the process of relative movement is reduced to the minimum, and the service life is prolonged.

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 necessarily generated during the machining process, and the characteristics of the gas molecules can enter any gap according to the pressure relationship.

The driving mechanism adopted by the triangular rotor 3 comprises an annular gear A6, a driving gear 10, an annular gear B11 and a driven gear 14, wherein the annular gear A6 and the annular gear B11 are fixedly connected to two ends of the triangular rotor 3 through bolts respectively, the circle of the annular gear A6, the circle center of the annular gear B11 and the geometric center of the triangular rotor 3 are concentrically arranged, the annular gear B11 is meshed with the driven gear 14, the annular gear A6 is meshed with the driving gear 10, the driven gear 14 is fixedly connected to a through hole formed in the end cover A1 through a hollow shaft integrally formed in the end part of the driven gear, and the hollow shaft integrally formed in the end part of the driving gear 10 is rotatably connected to a through hole correspondingly formed in the end cover B9 through a corresponding bearing.

The other end of the end cover A1 is fixedly connected with the sealing cover A23 through a bolt at the through hole formed in the end cover A1, the other end of the end cover B9 is fixedly connected with the sealing cover B24 through a bolt at the through hole formed in the end cover B9, and a through hole for the hollow shaft to pass through is formed in the sealing cover B24.

In order to ensure tightness, a mechanical sealing ring 25 is arranged between the inner wall of the through hole of 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 sealing ring 25 and the inner wall of the corresponding hollow shaft.

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 comprises a central shaft 4, a connecting rod A7, a connecting rod B12, a shaft A8 and a shaft B13, the geometric center of the triangular rotor 3 is rotationally connected with the central shaft 4 through a bearing 5, two ends of the central shaft 4 are respectively connected with the shaft A8 and the shaft B13 through the connecting rod A7 and the connecting rod B12, the shaft A8 and the shaft B13 are coaxially arranged, and the shaft A8 and the shaft B13 are positioned outside the geometric center of the triangular rotor 3.

Mechanical sealing rings 25 are arranged at the two ends of the central shaft 4, which are positioned on the upper bearing, and the mechanical sealing rings 25 are also sleeved on shaft sleeves arranged on the central shaft 4;

The shaft B13 is positioned in the hollow shaft of the driven gear 14, the shaft B13 is rotationally connected with the inner wall of the hollow shaft of the driven gear 14 through a corresponding bearing 5, and a corresponding mechanical sealing ring 25 is also arranged between the shaft B13 and the inner wall of the hollow shaft of the driven gear 14.

The shaft A8 is positioned in the hollow shaft of the driving gear 10, a corresponding mechanical sealing ring 25 is arranged between the shaft A8 and the inner wall of the hollow shaft of the driving gear 10, and the shaft A8 is connected with the output shaft of the motor through a coupling, so that the eccentric shaft structure is driven to rotate, and the triangular rotor 3 is driven to rotate in the compression cavity 2, meanwhile, as the driving gear and the driven gear are meshed with the corresponding annular gear A6 and the annular gear B11, the triangular rotor 3 rotates, namely, when the triangular rotor 3 and the whole eccentric shaft structure eccentrically rotate, the triangular rotor 3 can be stably rotated and controlled by the cooperation of the driving gear, the driven gear, the annular gear A6 and the annular gear B11, noise is reduced, and the rotation stability is improved.

Example 2

As shown in fig. 8, the ventilation holes 17 are connected with the air slits 15 through a plurality of pinholes 18. The pinhole 18 is a through hole cut by an arc, further increasing the pressure of the ejected air curtain. The structure has lower cost. And a pressure sensor and a temperature sensor are arranged outside the equipment to perform proper pattern selection and matching on a proper application scene.

Example 3

As shown in fig. 9, the air inlet hole 19 and the air outlet hole 20 are connected with the air inlet check valve 22, and the air outlet hole 20 of the compression cavity 2 is connected with the air outlet check valve 21;

The triangular rotor 3 rotates in the compression cavity 2, and when one angle of the triangular rotor 3 passes over the air inlet 19, the space from the angle to the direction of the air outlet can compress air in the rotation reverse direction of the triangular rotor, and then the air is discharged from the air outlet, so that the air inlet and the air outlet are realized in a circulating and reciprocating mode. I.e. by rotation of the triangular rotor, a change between volumes is created to create a pressure or vacuum at the outlet port 20 and the inlet port 19 to constitute a pure oil free air compressor or vacuum pump.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. A rotor compressed gas structure comprises a compression cavity (2) and a triangular rotor (3), wherein the triangular rotor (3) eccentrically moves in the compression cavity (2), an air inlet hole (19) and an air outlet hole (20) are formed in the surface of the compression cavity (2), two ends of the compression cavity (2) are fixedly connected with an end cover A (1) and an end cover B (9) through bolts respectively, the thickness of the triangular rotor (3) is equal to that of the compression cavity (2), the rotor compressed gas structure is characterized in that annular air grooves (16) are formed in the end faces of the two ends of the triangular rotor (3), air slits (15) are formed in the positions, close to the three corners of the triangular rotor (3), of the outer surface of the triangular rotor (3), vent holes (17) are formed in the positions, close to the three corners of the triangular rotor (3), of the air grooves (16), the vent holes (17) penetrate through the two ends of the triangular rotor (3), and the vent holes (17) are communicated with the air slits (15).

2. Rotor compressed gas structure according to claim 1, characterized in that the gas slots (15) are trapezoidal holes with a trapezoidal longitudinal section.

3. Rotor compressed gas structure according to claim 1, characterized in that the ventilation holes (17) are connected to the air slits (15) by means of a number of pinholes (18).

4. The rotor compressed gas structure according to claim 1, 2 or 3, wherein 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), wherein the inner gear ring A (6) and the inner gear ring B (11) are fixedly connected to two ends of the triangular rotor (3) through bolts respectively, the circle of the inner gear ring A (6), the circle center 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 meshed with the driven gear (14), the inner gear ring A (6) is meshed with the driving gear (10), the driven gear (14) is fixedly connected to the end cover A (1) through a hollow shaft with the end part integrally formed, and the hollow shaft with the end part integrally formed with the driving gear (10) is rotatably connected to a through hole correspondingly formed in the end cover B (9) through a corresponding bearing.

5. Rotor compressed gas structure according to claim 4, characterized in that an eccentric shaft structure is provided between the driving gear (10) and the driven gear (14).

6. The rotor compressed gas structure according to claim 5, wherein 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 rotationally connected with the central shaft (4) through a bearing (5), two ends of the central shaft (4) are respectively connected with the shaft A (8) and the shaft B (13) through the connecting rod A (7) and the connecting rod B (12), the shaft A (8) and the shaft B (13) are coaxially arranged, the shaft A (8) and the shaft B (13) are positioned outside the geometric center of the triangular rotor (3), the shaft B (13) is positioned in a hollow shaft of the driven gear (14), the shaft B (13) is rotationally connected with the inner wall of the hollow shaft of the driven gear (14) through a corresponding bearing (5), the shaft A (8) is positioned in the hollow shaft of the driving gear (10), and the shaft A (8) is connected with an output shaft of the motor through a coupling.

7. The rotor compressed gas structure according to claim 6, wherein the gas inlet hole (19) and the gas outlet hole (20), the gas inlet hole of the compression chamber (2) is connected to the gas inlet check valve (22), and the gas outlet hole (20) of the compression chamber (2) is connected to the gas outlet check valve (21).

8. A pure oilless air compressor or vacuum pump adopting a rotor compressed gas structure, characterized in that the pure oilless air compressor or vacuum pump is composed of the rotor compressed gas structure according to any one of claims 1 to 7, and pressure or vacuum is generated by the change of volumes through the rotation of a triangular rotor, and the pure oilless air compressor or vacuum pump is applied to air pipelines of medical and electric automobiles.