Four-stage compression efficient energy-saving centrifugal compressor

Abstract

The invention discloses a four-stage compression efficient energy-saving centrifugal compressor, and relates to the technical field of centrifugal compressors, the four-stage compression efficient energy-saving centrifugal compressor comprises a rack, a shell is fixedly connected to the inner side of the rack, an air outlet pipeline is mounted at an air outlet of the shell, an air inlet pipeline is mounted at an air inlet of the shell, and a compressor is mounted at the air inlet of the shell; four mounting grooves and four diffusion grooves are formed in the inner side of the shell, the air inlet pipeline is communicated with the diffusion grooves, impeller adjusting mechanisms are arranged on the inner sides of the diffusion grooves, and angle adjusting mechanisms are arranged on the inner sides of the mounting grooves; the impeller adjusting mechanism is arranged to drive the multiple blades to rotate, so that the angles of the blades are reduced, the airflow centrifugal force is reduced, meanwhile, the sectional area of an airflow channel is reduced, the flow of gas entering the impeller is reduced, the gas compression ratio is further reduced, the gas compression efficiency of the device is improved, and the service life of the device is prolonged. And the energy loss is reduced, so that the overall practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal compressors, specifically a four-stage compression high-efficiency and energy-saving centrifugal compressor. Background Art

[0002] The four-stage compression high-efficiency and energy-saving centrifugal compressor compresses gas. When it is necessary to change the compression ratio of air, it is necessary to adjust the rotational speed of the fan blades to change the compression amplitude of air. The existing centrifugal compressor has a matching impeller outlet air flow angle and diffuser groove inlet angle, and the air flow can smoothly enter the diffuser groove for diffusion. When the rotational speed decreases, the rotational speed of the impeller slows down, the centrifugal force obtained by the gas in the impeller decreases, resulting in a change in the impeller outlet air flow angle, which is no longer matched with the diffuser groove inlet angle. This causes the air flow to generate impact and turbulence when entering the diffuser groove, increasing the flow loss and thus reducing the efficiency of the diffuser groove. For this reason, we designed a four-stage compression high-efficiency and energy-saving centrifugal compressor to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a four-stage compression high-efficiency and energy-saving centrifugal compressor to solve the problem that when the rotational speed of the impeller decreases, the impeller outlet air flow angle deviates, resulting in a change in the impeller outlet air flow angle, which is no longer matched with the diffuser groove inlet angle, causing the air flow to generate impact and turbulence when entering the diffuser groove, increasing the flow loss, and thus reducing the efficiency of the diffuser groove.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A four-stage compression high-efficiency and energy-saving centrifugal compressor, comprising: a frame, a housing is fixedly connected to the inner side of the frame, an air outlet pipe is installed at the air outlet of the housing, an air inlet pipe is installed at the air inlet of the housing, four installation grooves and four diffuser grooves are opened on the inner side of the housing, and the air inlet pipe is communicated with the diffuser grooves. An impeller adjustment mechanism is arranged inside the diffuser groove, and an angle adjustment mechanism is arranged inside the installation groove; the impeller adjustment mechanism includes a connecting part fixedly connected to the inside of the diffuser groove, a first rectangular groove is opened on the inside of the connecting part, a first driving motor is installed inside the first rectangular groove, the output end of the first driving motor penetrates to the outside of the connecting part and is fixedly connected to a blade disc, a plurality of fixing seats are fixedly connected to the outer wall of the blade disc, a rotating shaft is rotatably connected to the inside of each of the plurality of fixing seats, the rotating shaft penetrates to the bottom of the fixing seat and is fixedly connected to a rotating seat, and an elastic rubber is fixedly connected between every two rotating seats, and a blade is fixedly connected to the top of the rotating seat.

[0005] As a further solution of the present invention: The impeller adjusting mechanism further includes a circular ring rotatably connected to the top of the fixed seat. A plurality of first teeth are fixedly connected to the outer wall of the circular ring. The rotating shaft penetrates through the top of the fixed seat and is fixedly connected to a first spur gear, and the first spur gear meshes with the first teeth. A driving assembly is arranged inside the disk 11.

[0006] As a further solution of the present invention: The driving assembly includes a second rectangular groove opened inside the disk. A second driving motor is installed inside the second rectangular groove. The output end of the second driving motor is fixedly connected to a first connecting shaft. The first connecting shaft penetrates through the top of the disk and is fixedly connected to a second spur gear. A plurality of second teeth are fixedly connected to the inside of the circular ring, and the second teeth mesh with the second spur gear.

[0007] As a further solution of the present invention: The angle adjusting mechanism includes four connecting chambers fixedly connected inside the four mounting grooves. The inside of one connecting chamber communicates with the intake pipe, and the inside of the other three connecting chambers communicates with the diffuser groove. A plurality of first connecting pipes are installed at the exhaust port of one end of the connecting chamber, and one end of each of the plurality of first connecting pipes is fixedly connected to a corrugated pipe. One end of the corrugated pipe is fixedly connected to a second connecting pipe. A rotating disk is rotatably connected inside the mounting groove, and a plurality of circular holes with the same inner diameter as that of the inside of the first connecting pipe are opened inside the rotating disk.

[0008] As a further solution of the present invention: The angle adjusting mechanism further includes a third driving motor installed at one end of the connecting chamber. The output end of the third driving motor is fixedly connected to a second connecting shaft, and the second connecting shaft is fixedly connected to the rotating disk. A diameter changing assembly is arranged between the second connecting pipe and the rotating disk.

[0009] As a further solution of the present invention: The diameter changing assembly includes a first circular plate rotatably connected to one side of the second connecting pipe. A plurality of arc-shaped grooves are opened inside the first circular plate, and a limiting post is slidably connected to the inside of each of the plurality of arc-shaped grooves. The bottom of the limiting post is fixedly connected to a movable piece. A second circular plate is fixedly connected to one side of the rotating disk. A plurality of limiting sliding grooves with the same number as that of the limiting posts are opened inside the second circular plate, and the movable piece is slidably connected to the inside of the limiting sliding groove.

[0010] As a further solution of the present invention: the diameter transformation component further includes an annular gear fixedly connected to the outer wall of the first circular plate, a straight rack is slidably connected to one side of the rotating disk, and the straight rack meshes with the annular gear. One end of the straight rack is fixedly connected to a fixing plate, a return spring is installed between the fixing plate and the rotating disk, and a synchronous driving unit is arranged at one end of the straight rack.

[0011] As a further solution of the present invention: the synchronous driving unit includes a connecting bar fixedly connected to one side of the straight rack, a rotating wheel is rotatably connected to one end of the connecting bar, a driving plate is fixedly connected to the inner side of the installation groove, a slope is formed on one side of the driving plate, and the rotating wheel abuts against the slope.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting the impeller adjustment mechanism, multiple first straight gears are driven to rotate synchronously, so that multiple rotating seats rotate clockwise, thereby driving multiple blades to rotate, reducing the angle of the blades, reducing the centrifugal force of the air flow, reducing the single-stage pressure ratio. At the same time, the reduction of the blade angle reduces the cross-sectional area of the air flow channel formed between adjacent blades, so that the gas flow rate entering the impeller decreases, further reducing the compression ratio of the gas and reducing energy loss. After the blade angle is reduced, the flow state of the air flow in the impeller changes, so that the outlet air flow angle of the impeller can better match the inlet angle of the diffuser groove. In this way, the air flow can enter the diffuser groove more smoothly, reducing the generation of impact and turbulence, thereby reducing the flow loss and improving the efficiency of the diffuser groove; 2. By setting the angle adjustment mechanism, the rotating disk is driven to rotate, thereby driving the second connecting pipe to rotate, so that the first connecting pipe, the corrugated pipe and the second connecting pipe are in an obliquely inclined state, changing the angle of gas flow, so that the gas can conform to the rotation direction of the blades, reducing the work demand of the blades, thereby reducing the impact loss at the blade inlet, and improving the utilization rate of energy; 3. By setting the diameter transformation component, the diameter of the channel composed of multiple movable pieces is reduced, accurately reducing the air intake volume inside the installation groove, providing a more stable basic condition for subsequent adjustment of the compression ratio, avoiding the problem of unstable compression effect caused by excessive fluctuation of the air intake volume. At the same time, in cooperation with the clockwise rotation of multiple rotating seats and the change of the gas flow direction by the rotating disk, a multi-dimensional compression ratio adjustment mechanism is formed, which can adjust the compression ratio more flexibly and accurately according to the actual working conditions, reduce unnecessary energy consumption, improve the compression efficiency of the device for gas, enable the device to maintain good performance under different working conditions, expand its application range, and thus improve the overall practicability of the device. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a sectional view of the present invention; Figure 3 is a schematic structural diagram of the housing of the present invention; Figure 4 is a sectional view of the impeller adjusting mechanism of the present invention; Figure 5 is a schematic structural diagram of the connecting part of the present invention; Figure 6 is a schematic structural diagram of the blade disc of the present invention; Figure 7 is a schematic structural diagram of the fixing seat of the present invention; Figure 8 is a schematic partial structural diagram of the impeller adjusting mechanism of the present invention; Figure 9 of the present invention Figure 8 is an enlarged view at position A in; Figure 10 is an exploded view of parts such as the rotating seat, elastic rubber and blade disc of the present invention; Figure 11 is a sectional view of the angle adjusting mechanism of the present invention; Figure 12 of the present invention Figure 11 is an enlarged view at position B in; Figure 13 is a schematic partial structural diagram of the diameter changing assembly of the present invention; Figure 14 is an exploded view of parts such as the first circular plate, movable piece and second circular plate of the present invention.

[0014] In the figure: 1, frame; 2, housing; 3, air outlet pipe; 4, air inlet pipe; 5, diffuser groove; 6, connecting part; 7, installation groove; 8, first rectangular groove; 9, first driving motor; 10, return spring; 11, blade disc; 12, rotating seat; 13, blade; 14, fixing seat; 15, rotating shaft; 16, first straight gear; 17, ring; 18, first engaging tooth; 19, second engaging tooth; 20, second rectangular groove; 21, second driving motor; 22, first connecting shaft; 23, second straight gear; 24, elastic rubber; 25, protective shell; 26, connecting bin; 27, rotating disc; 28, first connecting pipe; 29, corrugated pipe; 30, second connecting pipe; 31, first circular plate; 32, annular gear; 33, arc groove; 34, movable piece; 35, limiting post; 36, second circular plate; 37, limiting chute; 38, round hole; 39, driving plate; 40, straight rack; 41, connecting bar; 42, rotating wheel; 43, third driving motor; 44, second connecting shaft; 45, inclined surface; 46, fixing plate. Detailed implementation manners

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The embodiments of the present invention will be described below according to its overall structure.

[0017] Please refer to Figures 1 to 14, this embodiment provides a four-stage compression high-efficiency and energy-saving centrifugal compressor, including: a frame 1, a housing 2 is fixedly connected to the inner side of the frame 1, an air outlet pipe 3 is installed at the air outlet of the housing 2, an air inlet pipe 4 is installed at the air inlet of the housing 2, four installation grooves 7 and four diffuser grooves 5 are formed inside the housing 2, and the air inlet pipe 4 communicates with the diffuser grooves 5. An impeller adjustment mechanism is arranged inside the diffuser grooves 5, and an angle adjustment mechanism is arranged inside the installation grooves 7; The impeller adjustment mechanism includes a connecting part 6 fixedly connected to the inside of the diffuser groove 5. A first rectangular groove 8 is formed inside the connecting part 6. A first driving motor 9 is installed inside the first rectangular groove 8. The output end of the first driving motor 9 penetrates to the outside of the connecting part 6 and is fixedly connected to an impeller disc 11. A plurality of fixing seats 14 are fixedly connected to the outer wall of the impeller disc 11. A rotating shaft 15 is rotatably connected to the inside of each of the plurality of fixing seats 14. The rotating shaft 15 penetrates to the bottom of the fixing seat 14 and is fixedly connected to a rotating seat 12. An elastic rubber 24 is fixedly connected between every two rotating seats 12. A blade 13 is fixedly connected to the top of the rotating seat 12; The impeller adjustment mechanism further includes a ring 17 rotatably connected to the top of the fixing seat 14. A plurality of first teeth 18 are fixedly connected to the outer wall of the ring 17. The rotating shaft 15 penetrates to the top of the fixing seat 14 and is fixedly connected to a first spur gear 16, and the first spur gear 16 meshes with the first teeth 18. A driving component is arranged inside the impeller disc 11; The driving component includes a second rectangular groove 20 formed inside the impeller disc 11. A second driving motor 21 is installed inside the second rectangular groove 20. The output end of the second driving motor 21 is fixedly connected to a first connecting shaft 22. The first connecting shaft 22 penetrates to the top of the impeller disc 11 and is fixedly connected to a second spur gear 23. A plurality of second teeth 19 are fixedly connected to the inside of the ring 17, and the second teeth 19 mesh with the second spur gear 23.

[0018] The diameter inside the diffuser groove 5 gradually increases from the input end to the output end (the diameter at the output end increases to 1.5 - 1.8 times the diameter at the output end). The first driving motor 9 is controlled by a PLC controller, and the first driving motor 9 can be controlled to start intermittently. The air inlet pipe 4 is connected to an external air supply pipe. When the external air supply pipe supplies air to the air inlet pipe 4, the PLC controller controls the first driving motor 9 to start, thereby driving the impeller disc 11 to rotate, and then driving the blades 13 to rotate, so as to push the gas on one side of the impeller disc 11 into the inside of the diffuser groove 5. Inside the diffuser groove 5, since the diameter of the pipe inside gradually increases, the gas flow rate gradually decreases, thereby compressing the gas, and then repeating this operation to compress the gas multiple times to achieve efficient compression of the gas.

[0019] The impeller is composed of parts such as a disk 11, a rotating seat 12, and blades 13. The second driving motor 21 is controlled by a PLC controller and can be controlled to start intermittently. When the compression ratio of the gas needs to be reduced during the process of the blades 13 compressing the gas, at this time, the PLC controller controls the second driving motor 21 to start, thereby driving the second spur gear 23 to rotate, thus driving the second engaging tooth 19 to rotate, thereby driving the ring 17 to rotate, thereby driving the first engaging tooth 18 to rotate, thus driving a plurality of first spur gears 16 to rotate synchronously, thereby causing a plurality of rotating seats 12 to rotate in the clockwise direction, thereby driving a plurality of blades 13 to rotate, thereby reducing the angle of the blades 13, thereby reducing the centrifugal force of the air flow and reducing the single-stage compression ratio. At the same time, the reduction of the angle of the blades 13 causes the cross-sectional area of the air flow channel formed between adjacent blades 13 to shrink, thereby reducing the gas flow rate entering the impeller, thereby further reducing the compression ratio of the gas and reducing energy loss. After the angle of the blades 13 is reduced, the flow state of the air flow in the impeller changes, enabling the outlet air flow angle of the impeller to better match the inlet angle of the diffuser groove 5. In this way, the air flow can enter the diffuser groove 5 more smoothly, reducing the generation of impact and turbulence, thereby reducing the flow loss and improving the efficiency of the diffuser groove 5.

[0020] The newly designed impeller adjustment mechanism can flexibly adjust the compression ratio without relying on a significant reduction in speed, reduce energy loss and improve compression efficiency. This enables the device to maintain good performance under different operating conditions, enhancing the adaptability and stability of the device, thereby improving the overall practicality of the device.

[0021] The elastic rubber 24 is composed of flexible rubber and can be stretched to an appropriate extent. When a plurality of rotating seats 12 rotate synchronously, at this time, the elastic rubber 24 rotates synchronously with the rotating seats 12, thereby enabling the two ends of the elastic rubber 24 to be pulled synchronously, so that a closed state is always maintained between a plurality of rotating seats 12 and no gap appears with the rotation of the rotating seats 12, thereby preventing gas from flowing out, thereby improving the overall stability of the device and thus improving the overall practicality of the device.

[0022] Please refer to Figures 4 to 14, the angle adjustment mechanism includes four connection chambers 26 fixedly connected to the inner sides of the four installation grooves 7. The inner side of one connection chamber 26 communicates with the intake pipe 4, and the inner sides of the other three connection chambers 26 communicate with the diffuser groove 5. A plurality of first connection pipes 28 are installed at the exhaust port at one end of the connection chamber 26, and one end of each of the plurality of first connection pipes 28 is fixedly connected to a bellows 29. One end of the bellows 29 is fixedly connected to a second connection pipe 30. A rotating disk 27 is rotatably connected to the inner side of the installation groove 7, and a plurality of circular holes 38 having the same inner diameter as that of the inner side of the first connection pipe 28 are formed in the inner side of the rotating disk 27. The angle adjustment mechanism further includes a third driving motor 43 installed at one end of the connection chamber 26. The output end of the third driving motor 43 is fixedly connected to a second connection shaft 44, and the second connection shaft 44 is fixedly connected to the rotating disk 27. A diameter transformation component is provided between the second connection pipe 30 and the rotating disk 27. The diameter transformation component includes a first circular plate 31 rotatably connected to one side of the second connection pipe 30. A plurality of arc-shaped grooves 33 are formed in the inner side of the first circular plate 31, and a limiting post 35 is slidably connected to the inner side of each of the plurality of arc-shaped grooves 33. The bottom of the limiting post 35 is fixedly connected to a movable piece 34. A second circular plate 36 is fixedly connected to one side of the rotating disk 27. A plurality of limiting sliding grooves 37 having the same number as that of the limiting posts 35 are formed in the inner side of the second circular plate 36, and the movable piece 34 is slidably connected to the inner side of the limiting sliding groove 37. The diameter transformation component further includes an annular gear 32 fixedly connected to the outer wall of the first circular plate 31. A straight rack 40 is slidably connected to one side of the rotating disk 27, and the straight rack 40 meshes with the annular gear 32. One end of the straight rack 40 is fixedly connected to a fixing plate 46. A return spring 10 is installed between the fixing plate 46 and the rotating disk 27. A synchronous driving unit is provided at one end of the straight rack 40. The synchronous driving unit includes a connecting strip 41 fixedly connected to one side of the straight rack 40. One end of the connecting strip 41 is rotatably connected to a rotating wheel 42. A driving plate 39 is fixedly connected to the inner side of the installation groove 7. An inclined surface 45 is formed on one side of the driving plate 39, and the rotating wheel 42 abuts against the inclined surface 45.

[0023] The third driving motor 43 is controlled by a PLC controller, and the third driving motor 43 can be controlled to start intermittently. When the plurality of rotating seats 12 rotate in the clockwise direction, at this time, the PLC controller controls the third driving motor 43 to start, so as to drive the second connection shaft 44 to rotate in the clockwise direction, thereby driving the rotating disk 27 to rotate, thereby driving the second connection pipe 30 to rotate, so that the first connection pipe 28, the bellows 29 and the second connection pipe 30 are in an obliquely inclined state, thereby changing the angle of gas flow, so that the gas can conform to the rotation direction of the blade 13, reducing the work demand of the blade 13, thereby reducing the inlet impact loss of the blade 13, and thus improving the energy utilization rate.

[0024] When the rotating disk 27 rotates, it drives the straight rack 40 to rotate. Thus, under the action of the inclined plane 45, the rotating wheel 42 is driven to move in the direction of the second connecting shaft 44, which drives the straight rack 40 to move, thereby driving the annular gear 32 to rotate clockwise, driving the first circular plate 31 to rotate. Driving the first circular plate 31 to rotate, under the action of the arc-shaped groove 33, a plurality of movable pieces 34 are driven to move along the inner side of the limit sliding groove 37 respectively, so that the plurality of movable pieces 34 are tightened inward, thereby reducing the diameter of the channel formed by the plurality of movable pieces 34, accurately reducing the intake air volume inside the installation groove 7, providing a more stable basic condition for subsequent compression ratio adjustment, avoiding the problem of unstable compression effect caused by excessive intake air volume fluctuation. At the same time, in cooperation with the clockwise rotation of a plurality of rotating seats 12 and the change of the gas flow direction by the rotating disk 27, a multi-dimensional compression ratio adjustment mechanism is formed, which can adjust the compression ratio more flexibly and accurately according to the actual working conditions, reduce unnecessary energy consumption, improve the compression efficiency of the device for gas, enable the device to maintain good performance under different working conditions, expand its application range, and thus improve the overall practicability of the device.

[0025] When it is necessary to increase the compression ratio of the device, at this time, the PLC controller can control the start of the second driving motor 21. When driving a plurality of rotating seats 12 to rotate counterclockwise, at this time, the PLC controller can control the second connecting shaft 44 to rotate counterclockwise, so that a plurality of blades 13 rotate in the opposite direction, increasing the angle of the blades 13, increasing the inlet flow rate. At the same time, the PLC controller can control the second connecting pipe 30 to rotate in the opposite direction, so that the first connecting pipe 28, the corrugated pipe 29 and the second connecting pipe 30 are in a reverse inclined state, changing the angle of gas flow, so that the gas can flow against the rotation direction of the blades 13, increasing the work capacity of the blades 13, thereby increasing the compression ratio of the device for gas. At the same time, the plurality of movable pieces 34 open outward, increasing the diameter of the channel formed by the plurality of movable pieces 34, increasing the intake air volume inside the installation groove 7, further increasing the compression ratio of the device, and thus improving the overall practicability of the device.

[0026] The above is only the preferred specific embodiment 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 and inventive concept of the present invention, makes equivalent substitution or change, and should be covered within the protection scope of the present invention.

Claims

1. Four-stage compression high-efficiency energy-saving centrifugal compressor, characterized in that: include: A frame (1), a shell (2) is fixedly connected to the inner side of the frame (1), an air outlet pipe (3) is installed at the air outlet of the shell (2), an air intake pipe (4) is installed at the air intake of the shell (2), four installation grooves (7) and four diffuser grooves (5) are opened on the inner side of the shell (2), and the air intake pipe (4) and the diffuser groove (5) are communicated, an impeller adjustment mechanism is arranged on the inner side of the diffuser groove (5), and an angle adjustment mechanism is arranged on the inner side of the installation groove (7); The impeller adjustment mechanism comprises a connecting portion (6) fixedly connected to the inner side of the diffuser groove (5), a first rectangular groove (8) is opened on the inner side of the connecting portion (6), a first drive motor (9) is installed on the inner side of the first rectangular groove (8), an output end of the first drive motor (9) passes through the outer side of the connecting portion (6) and is fixedly connected to a blade disk (11), a plurality of fixed seats (14) are fixedly connected to the outer wall of the blade disk (11), a plurality of fixed seats (14) are rotatably connected to the inner sides of the plurality of fixed seats (14), a rotating shaft (15) is rotatably connected to the bottom of the rotating shaft (15) passing through the fixed seat (14) and is fixedly connected to a rotating seat (12), an elastic rubber (24) is fixedly connected between every two rotating seats (12), and a blade (13) is fixedly connected to the top of the rotating seat (12).

2. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 1 is characterized in that: The impeller adjustment mechanism further comprises a circular ring (17) rotatably connected to the top of the fixing seat (14); a plurality of first latching teeth (18) are fixedly connected to the outer wall of the circular ring (17); the rotating shaft (15) passes through the top of the fixing seat (14) and is fixedly connected to a first spur gear (16); the first spur gear (16) is meshed with the first latching teeth (18); and a driving assembly is arranged on the inner side of the impeller (11).

3. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 2 is characterized in that: The drive assembly comprises a second rectangular groove (20) formed on the inner side of the blade disk (11); a second drive motor (21) is mounted on the inner side of the second rectangular groove (20); an output end of the second drive motor (21) is fixedly connected to a first connecting shaft (22); the first connecting shaft (22) passes through the top of the blade disk (11) and is fixedly connected to a second spur gear (23); a plurality of second latch teeth (19) are fixedly connected to the inner side of the circular ring (17); and the second latch teeth (19) are meshed with the second spur gear (23).

4. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 3 is characterized in that: The angle adjustment mechanism comprises four connecting chambers (26) fixedly connected to the inner sides of the four mounting grooves (7), and the inner side of one of the connecting chambers (26) is communicated with the air intake duct (4), and the inner sides of the other three connecting chambers (26) are communicated with the diffuser groove (5); a plurality of first connecting pipes (28) are installed at the exhaust port at one end of the connecting chamber (26), and one end of each of the plurality of first connecting pipes (28) is fixedly connected to a bellows (29), and one end of the bellows (29) is fixedly connected to a second connecting pipe (30); a rotating disk (27) is rotatably connected to the inner side of the mounting groove (7), and a plurality of circular holes (38) having the same diameter as the inner side of the first connecting pipe (28) are provided on the inner side of the rotating disk (27).

5. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 4 is characterized in that: The angle adjustment mechanism further comprises a third drive motor (43) mounted at one end of the connection bin (26); an output end of the third drive motor (43) is fixedly connected to a second connection shaft (44), and the second connection shaft (44) is fixedly connected to the rotating disk (27); and a diameter conversion component is provided between the second connection tube (30) and the rotating disk (27).

6. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 5 is characterized in that: The diameter conversion assembly comprises a first circular plate (31) rotatably connected to one side of the second connecting tube (30); a plurality of arc-shaped grooves (33) are provided on the inner side of the first circular plate (31); and a limiting column (35) is slidably connected to the inner side of each of the plurality of arc-shaped grooves (33); a movable sheet (34) is fixedly connected to the bottom of the limiting column (35); a second circular plate (36) is fixedly connected to one side of the rotating disk (27); a plurality of limiting sliding grooves (37) are provided on the inner side of the second circular plate (36) and the number of the limiting sliding grooves (37) is the same as that of the limiting column (35); and the movable sheet (34) is slidably connected to the inner side of the limiting sliding groove (37).

7. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 6 is characterized in that: The diameter conversion assembly further comprises an annular gear (32) fixedly connected to the outer wall of the first circular plate (31); a spur rack (40) is slidably connected to one side of the rotating disk (27), and the spur rack (40) is meshed with the annular gear (32); one end of the spur rack (40) is fixedly connected to a fixed plate (46); a return spring (10) is installed between the fixed plate (46) and the rotating disk (27); and a synchronous drive unit is provided at one end of the spur rack (40).

8. The four-stage compression high-efficiency energy-saving centrifugal compressor according to claim 7 is characterized in that: The synchronous drive unit comprises a connecting bar (41) fixedly connected to one side of the spur rack (40), one end of the connecting bar (41) being rotatably connected to a rotating wheel (42), the inner side of the mounting groove (7) being fixedly connected to a driving plate (39), one side of the driving plate (39) being provided with an inclined surface (45), and the rotating wheel (42) abutting against the inclined surface (45).

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