A multi-rotor compressor

Abstract

A multi-rotor compressor is provided with a plurality of identical driven female rotors and a common active male rotor. The cross-sectional tooth shapes of the common active male rotor and each of the driven female rotors distributed around it satisfy the same meshing relationship. The active male rotor and the driven female rotor are both set to have a cylindrical shape along the axial direction of their cross-sectional tooth shapes. The rotation of the active male rotor can drive the plurality of identical driven female rotors to rotate synchronously. When the active male rotor rotates one circle, there will be more meshing and disengagement of the male and female rotor pairs, and more suction, compression and exhaust processes can be completed, thereby realizing the compression of the medium. It is the superposition of multiple suction, compression and exhaust working processes, which greatly improves the energy efficiency of the compressor. A multi-rotor compressor can save electricity by more than 12% to 16%, is an energy-saving compressor with excellent performance, is more suitable for serialized products and mass production, and has great economic and social value.

Description

Technical Field

[0001] The present invention relates to a multi-rotor compressor, which is a rotary positive displacement compressor. It is a device that converts the mechanical energy of a driving machine into the pressure or kinetic energy of a compressed medium. It can also be used as a vacuum pump and belongs to the field of mechanical industry. Background Art

[0002] Common compressors include piston compressors, screw compressors, vane compressors, scroll compressors, rolling rotor compressors, centrifugal compressors, triangular rotor compressors and other types. They each have their own advantages and disadvantages and are widely used in different fields.

[0003] A piston compressor completes the process of suction, compression and exhaust once in one reciprocating stroke, and the return stroke is an idle stroke; for a screw compressor, the positive rotor completes the process of suction, compression and exhaust N times (N is the number of teeth of the positive rotor) in one rotation, without eccentricity, but there is leakage loss caused by the leakage triangle; a rolling rotor compressor needs to be set with an eccentricity; a scroll compressor has multiple compressions in one rotation, and requires an eccentric structure; a vane compressor, the rotor completes the process of suction, compression and exhaust multiple times in one rotation, but the vane is a thin-walled part that is easily worn, and the rotor is eccentric; a compressor with an eccentric structure needs to be equipped with a balancing device to balance the unbalanced force, and the structure is complex, and it is not suitable for high-speed application; a centrifugal compressor has no eccentricity and can be used at high speed, but the machining of the centrifugal compressor rotor is difficult and the cost is high.

[0004] A double-tooth hook type compressor and a single-tooth compressor cannot be expanded into a multi-rotor compressor due to the limitation of the number of teeth.

[0005] There is also a three-rotor screw compressor on the market, but due to the rotation direction of the screw rotor, it cannot maintain complete consistency in the direction of all intake and exhaust in the compressor, and will not increase the compressor's displacement in proportion to the increase in the number of rotors. The increased efficiency is limited and it has not been widely used.

[0006] On the other hand, air compressors are large electricity consumers. Improving the energy efficiency level of compressors, saving electricity, and reducing electricity costs will benefit the country and the people.

[0007] The present invention is based on compressor theory and summarizes the advantages and disadvantages of existing compressors. Aiming at improving the energy efficiency level of compressors, the present invention invents a multi-rotor compressor, which is a brand-new technical solution. Currently, there is no known compressor product that is the same or similar to the present invention. Summary of the invention

[0008] The present invention is based on compressor theory and integrates the advantages and disadvantages of various compressors to invent a multi-rotor compressor.

[0009] The present invention is implemented as follows: a multi-rotor compressor, wherein the multi-rotor includes a plurality of identical driven female rotors and a common active male rotor, the number of teeth of the active male rotor and the driven female rotor are both set to multiple teeth, the number of teeth of the driven female rotor is greater than the number of teeth of the active male rotor, the common active male rotor is arranged at a central position, a plurality of identical driven female rotors are distributed around the active male rotor, the cross-sectional tooth shape of the common active male rotor and each driven female rotor distributed around it are set to satisfy the same meshing relationship, the active male rotor and the driven female rotor are both set to have a cylindrical shape along the axial direction of their cross-sectional tooth shape, so that the suction, compression and exhaust directions of the compressor are consistent, the rotation of the active male rotor can drive the synchronous rotation of the plurality of identical driven female rotors, and the active male rotor rotates one circle, there will be more times of meshing and disengagement of the male and female rotor pairs, and the inter-tooth volume of the plurality of pairs of rotors will change periodically from large to small, which can complete more times of suction, compression and exhaust processes, and is the superposition of more suction, compression and exhaust working processes, thereby realizing the compression of the medium and improving the energy efficiency of the compressor.

[0010] A multi-rotor compressor mainly comprises: 1. an active male rotor; 2. a driven female rotor 1; 3. a driven female rotor 2; 4. a driven female rotor 3; 5. a cylinder body; 6. a support; 7. a rear cover; 8. a sleeve; 9. a locking nut 1; 10. a bearing 1; 11. a wave spring 1; 12. a wave spring 2; 13. a locking nut 2; 14. a bearing 2; 15. a bearing 3; 16. a front cover; 17. a shaft seal; 18. a steel sleeve; 19. a sealing gasket; 20. a bearing 4. The active male rotor (1) is supported at the center of the cylinder body (5) and the support (6) by means of the bearing 2 (14) and the bearing 3 (15); the driven female rotor 1 (2), the driven female rotor 2 (3) and the driven female rotor 3 (4) are supported respectively by means of The bearing 1 (10) and the bearing 4 (20) are supported on the cylinder body (5) and the support (6), and are distributed around the active male rotor (1). An air intake port is provided on the cylinder body (5), and an air exhaust port is provided on the support (6). The air intake ends of the driven female rotor 1, the driven female rotor 2 and the driven female rotor 3 are all provided with sealing gaskets (19). The rear cover (7), the front cover (16) and the shaft seal (17) realize the sealing of the compressor cavity. The number of teeth of the active male rotor and the driven female rotor are both set to be multiple teeth, the number of teeth of the driven female rotor is greater than the number of teeth of the active male rotor, the cross-sectional tooth shapes of the active male rotor and the driven female rotor are set to satisfy the same meshing relationship, and the active male rotor and the driven female rotor are both set to be cylindrical shapes along the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Front view of a multi-rotor compressor

[0012] Figure 2 Top view of a multi-rotor compressor

[0013] Figure 3Left view of a multi-rotor compressor

[0014] Figure 4 AA cross-sectional view of a multi-rotor compressor

[0015] The gist of the present invention is: a multi-rotor compressor, wherein the rotor comprises a plurality of identical driven female rotors and a common active male rotor, the number of teeth of the active male rotor and the driven female rotor are both set to multiple teeth, the number of teeth of the driven female rotor is greater than the number of teeth of the active male rotor, the common active male rotor is arranged at a central position, a plurality of identical driven female rotors are distributed around the active male rotor, the cross-sectional tooth shape of the common active male rotor and each driven female rotor distributed around it satisfies the same meshing relationship, the active male rotor and the driven female rotor are both set to a cylindrical shape with their cross-sectional tooth shape along the axial direction, so that the suction, compression and exhaust directions of the compressor are consistent, the rotation of the active male rotor can drive the synchronous rotation of a plurality of identical driven female rotors, when the active male rotor rotates one circle, there will be multiple meshing and disengagement of the yin and yang rotor pairs, the inter-tooth volume of the multiple pairs of rotors will change periodically from large to small, and multiple suction, compression and exhaust processes can be completed, thereby realizing the compression of the medium, which is the superposition of multiple suction, compression and exhaust working processes, thereby improving the performance and efficiency of the compressor.

[0016] The beneficial effects of the present invention are as follows: a multi-rotor compressor is a positive displacement compressor, and its displacement is proportional to the inter-tooth volume and the rotational speed. When the rotational speed and the cross-sectional shape of the rotor are determined, its volume is mainly proportional to the rotor length. A doubling of the suction area means a halving of the rotor length. The present invention has a plurality of identical driven female rotors meshing with a common active male rotor. Therefore, for compressors of the same volume, the beneficial effects of the present invention are that the effective suction working area is increased exponentially, and at the same time, the distance passed by the compression process is shortened by the same multiple, which is beneficial to the improvement of the thermal characteristics of the compressed medium, and thus improves the working characteristics of the compressor; a multi-rotor compressor can shorten the rotor length according to the corresponding proportion. The shortening of the rotor length can reduce the weight of the active male rotor connected to the power shaft, and reduce the driving power. The invention can improve the efficiency, save electric energy and improve the energy efficiency level of the compressor; the shortening of the rotor length can also improve the rigidity of the rotor, improve the running stability of the rotor and enhance the working characteristics of the compressor; another beneficial effect is that when the equipment for processing the rotor is limited by the processing size, the invention can manufacture a compressor with a larger displacement, and another beneficial effect is that, using the same tool, it is convenient to manufacture a series of products with different rotor lengths to meet different displacement requirements, which is suitable for mass production; another beneficial effect is that the active male rotor and the driven female rotor are both set to the cylindrical shape of their cross-sectional tooth shape along the axial direction. Since there is no spiral and there is no problem of hand direction, the consistency of the directions of all air intake and compression and exhaust of a multi-rotor compressor can be guaranteed, which is the superposition of more air intake and compression and exhaust processes, and improves the performance of the compressor. Compared with the dual-rotor compressor, the invention can shorten the rotor length by more than 1 / 2 to 2 / 3. The shortening of the rotor length means the reduction of the no-load driving power of the compressor. Combined with practical calculations, the invention can save electricity by more than 12% to 16%. Therefore, a multi-rotor compressor is an energy-saving compressor with excellent performance, which is more suitable for serialized products and mass production, and has great economic and social value.

[0017] Specific implementation method: Combination Figure 1 , Figure 2 , Figure 3 , Figure 4A multi-rotor compressor mainly comprises: 1. an active male rotor; 2. a driven female rotor 1; 3. a driven female rotor 2; 4. a driven female rotor 3; 5. a cylinder body; 6. a support; 7. a rear cover; 8. a sleeve; 9. a locking nut 1; 10. a bearing 1; 11. a wave spring 1; 12. a wave spring 2; 13. a locking nut 2; 14. a bearing 2; 15. a bearing 3; 16. a front cover; 17. a shaft seal; 18. a steel sleeve; 19. a sealing gasket; 20. a bearing 4. The active male rotor (1) is supported at the center of the cylinder body (5) and the support (6) by the bearing 2 (14) and the bearing 3 (15). The driven female rotor 1 (2) is supported at the center of the cylinder body (5) and the support (6) by the bearing 2 (14) and the bearing 3 (15). The driven female rotor 2 (3) and the driven female rotor 3 (4) are supported on the cylinder body (5) and the support (6) respectively through the bearing 1 (10) and the bearing 4 (20), and are distributed around the active male rotor (1). An air intake port is provided on the cylinder body (5), and an air discharge port is provided on the support (6). The air intake ends of the driven female rotor 1, the driven female rotor 2 and the driven female rotor 3 are all provided with sealing gaskets (19). The rear cover (7), the front cover (16) and the shaft seal (17) realize the sealing of the compressor cavity. The number of teeth of the active male rotor and the driven female rotor are both set to multiple teeth. The active male rotor (1) is set to 6 teeth, and the driven female rotor 1, the driven female rotor 2 and the driven female rotor 3 are all set to multiple teeth. The active female rotor 3 is set to have 7 teeth, and the active male rotor and the driven female rotor are both set to have a cylindrical shape along the axial direction of their cross-sectional tooth shape. The cross-sectional shape and size of the three driven female rotors are the same. The three female rotors are adjacent to each other and are spaced apart by an active male rotor. The teeth are distributed around the active male rotor to ensure that the teeth can fully inhale air during the operation of the compressor. The cross-sectional tooth shapes of the active male rotor and each driven female rotor satisfy the same meshing relationship. The active male rotor at the center position drives the three driven female rotors around it to rotate synchronously. When the active male rotor rotates one circle, there will be 3×6 meshing and disengagement of the male and female rotor pairs, and the inter-tooth volume of the three pairs of male and female rotor pairs will periodically change from large to small. With a small change, 3×6 times of suction, compression and exhaust processes can be completed, thereby realizing the compression of the medium. The active male rotor and the driven female rotor are both set to a cylindrical shape with their cross-sectional tooth profiles along the axial direction. Since there is no spiral and there is no problem of rotation direction, the consistency of the directions of all suction and compression and exhaust of a multi-rotor compressor can be guaranteed. It is the superposition of the suction and compression and exhaust processes of three pairs of yin and yang rotors. Under the premise of the same cross-section, the same speed and the same displacement, compared with the twin-rotor compressor, the present invention can shorten the rotor length by 2 / 3. The shortening of the rotor length means a reduction in the no-load driving power of the compressor. Combined with practical calculations, the present invention can save about 15% of electricity.

Claims

1. A multi-rotor compressor, comprising:

1. Active positive rotor; 2. Driven female rotor 1; 3. Driven female rotor 2; 4. Driven female rotor 3; 5. Cylinder body; 6. Support; 7. Rear cover; 8. Sleeve; 9. Lock nut 1; 10. Bearing 1; 11. Wave spring 1; 12. Wave spring 2; 13. Lock nut 2; 14. Bearing 2; 15. Bearing 3; 16. Front cover; 17. Shaft seal; 18. Steel sleeve; 19. Sealing gasket; 20. Bearing 4. The active male rotor (1) is supported at the center of the cylinder body (5) and the support (6) through the bearing 2 (14) and the bearing 3 (15). The active female rotor 1 (2), the driven female rotor 2 (3), and the driven female rotor 3 (4) are supported on the cylinder body (5) and the support (6) respectively through the bearing 1 (10) and the bearing 4 (20), and are distributed around the active male rotor (1). An air intake port is provided on the cylinder body (5), and an air exhaust port is provided on the support (6). The air intake ends of the driven female rotor 1, the driven female rotor 2, and the driven female rotor 3 are all provided with sealing gaskets (19). The rear cover (7), the front cover (16), and The shaft seal (17) realizes the sealing of the compressor cavity. The number of teeth of the active male rotor and the driven female rotor is set to be multiple teeth, the number of teeth of the driven female rotor is greater than the number of teeth of the active male rotor, the cross-sectional tooth shapes of the active male rotor and the driven female rotor are set to satisfy the same meshing relationship, and the active male rotor and the driven female rotor are both set to have a cylindrical shape along the axial direction of their cross-sectional tooth shapes. The multi-rotor comprises a plurality of identical driven female rotors and a common active male rotor, which is characterized in that a common active male rotor is arranged at a central position, and a plurality of identical driven female rotors are arranged to be distributed around the active male rotor. The cross-sectional tooth shapes of the common active male rotor and each of the driven female rotors distributed around it are set to satisfy the same meshing relationship. The number of teeth of the active male rotor and the driven female rotor are both set to be multiple teeth, the number of teeth of the driven female rotor is greater than the number of teeth of the active male rotor, and the active male rotor and the driven female rotor are both set to have a cylindrical shape along the axial direction of their cross-sectional tooth shapes. The suction end of the driven female rotor is provided with a sealing gasket.

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