Multi-shaft gear type isothermal centrifugal compressor capable of avoiding surge

Abstract

The invention relates to the technical field of compressors, in particular to a multi-shaft gear type isothermal centrifugal compressor capable of avoiding surge. Comprising a mounting base, and a protective shell is arranged at the top of the mounting base; two groups of primary centrifugal compression mechanisms are symmetrically arranged on two side walls of the mounting base; the air inlet end of each primary centrifugal compression mechanism communicates with an air inlet adjusting mechanism. When the centrifugal compressor is about to enter a surge working condition, the cold ends of the multiple sets of semiconductor cooling fins are controlled to rotate towards the interior of the exhaust volute pipe, so that when gas reversely flows, part of the gas enters the mounting groove through the semiconductor cooling fins and then reversely impacts main body gas flow under the guidance of the closed section, and the gas flow is reduced. Turbulent flow is formed in the exhaust volute pipe, so that gas is prevented from flowing back to the gas inlet end to form a surge phenomenon, and the cooling efficiency of high-pressure gas is improved while the working effect of the centrifugal compressor is improved.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, and specifically relates to a multi-axis toothed isothermal centrifugal compressor that avoids surge. Background Technology

[0002] Centrifugal compressors are widely used as the core component for refrigerant compression in central air conditioning systems of large commercial buildings and data centers, as well as in industrial refrigeration processes, due to their high efficiency and energy saving.

[0003] A search revealed that Chinese Patent Publication No. CN119412363B, published on April 15, 2025, discloses a multi-shaft, multi-stage centrifugal compressor for high-temperature heat pumps. The compressor includes an input shaft, an output shaft, and a gearbox. The input and output shafts are mounted on the gearbox, and the input shaft is connected to the output shaft via a gear set. A primary compressor is mounted at one end of the output shaft, and a secondary compressor is mounted at the other end. The compressor also includes a vacuum compressor. A primary sealing device is provided at the connection between the primary compressor and the gearbox, and a secondary sealing device is provided at the connection between the secondary compressor and the gearbox. The primary and secondary sealing devices are connected, and the secondary sealing device is connected to the vacuum compressor via a vacuum pipe. The vacuum compressor is mounted on the input shaft and delivers the working fluid to the working fluid system. This invention reduces working fluid leakage and improves the sealing effect by setting a sealing device between the compressor and the gearbox.

[0004] However, the device still has the following drawbacks:

[0005] Existing solutions for surge in gear-type centrifugal compressors typically involve using an external anti-surge valve to return some of the high-pressure gas to the compressor inlet when surge occurs. However, this does not solve the internal gas backflow problem, thus the surge condition still exists, reducing the working efficiency of the centrifugal compressor. Summary of the Invention

[0006] To address the above problems, the present invention provides a multi-axis gear isothermal centrifugal compressor that avoids surge, including a mounting base, the top of which is provided with a protective shell; two sets of primary centrifugal compression mechanisms are symmetrically arranged on the two side walls of the mounting base; and each set of primary centrifugal compression mechanisms has an intake regulating mechanism connected to its inlet end.

[0007] The primary centrifugal compression mechanism includes a housing; an exhaust volute is provided on one side wall of the housing; several sets of mounting slots are arranged in a ring array on the inner wall of the end of the exhaust volute away from the housing; each set of mounting slots is composite; each set of mounting slots is provided with a set of semiconductor heat sinks; the cold end of each set of semiconductor heat sinks is located in the open section of the mounting slot.

[0008] The hot end of each semiconductor heat sink is located within the closed section of the mounting slot and moves against the inner wall of the corresponding side of the mounting slot; the exhaust volute has a cooling channel spirally opened near the hot end of the semiconductor heat sink.

[0009] Furthermore, two sets of guide grooves are symmetrically provided on the two side walls of the two sets of protective shells; the guide grooves are arc-shaped; each set of guide grooves is provided with several sets of connecting drive mechanisms; each set of connecting drive mechanisms is connected to a set of secondary centrifugal compression mechanisms at the end away from the guide groove; each set of secondary centrifugal compression mechanisms has the same structure as the primary centrifugal compression mechanism.

[0010] Furthermore, the mounting base and protective housing are provided with a drive cavity; the drive cavity is provided with a main gear; the drive cavity is provided with a primary drive gear shaft; the primary drive gear shaft is connected to two sets of primary centrifugal compression mechanisms; the drive cavity is provided with several sets of secondary drive gear shafts along an arc shape; the number of teeth of the several sets of secondary drive gear shafts decreases sequentially.

[0011] Furthermore, each set of secondary drive gear shafts is connected to a set of electromagnetic clutches at both ends; the end of each set of electromagnetic clutches away from the main gear extends into a corresponding set of guide grooves; a set of guide grooves is provided on the inner wall of the side of each set of guide grooves near the central axis of the main gear; a set of racks is provided on the inner wall of the side of each set of guide grooves near the central axis of the main gear; the racks are arc-shaped.

[0012] Furthermore, an air intake channel is provided on one side wall of the housing; a pressure sensor is provided in both the air intake channel and the exhaust volute; a connecting flange is provided at the end of the exhaust volute away from the housing; and a centrifugal impeller is provided in the air intake channel.

[0013] Furthermore, the intake regulating mechanism includes an intake ring; several sets of intake guide vanes are arranged in a ring array inside the intake ring; each set of intake guide vanes has an independent rotating shaft; several sets of expansion plates are hinged in a ring array at the end of the intake ring away from the primary centrifugal compression mechanism; a set of folding baffles is provided between two adjacent sets of expansion plates; and a second drive chamber is provided inside the intake ring.

[0014] Furthermore, the second driving cavity is provided with a double gear ring; several sets of first-stage push plates are arranged in a ring array on one side wall of the double gear ring near the expansion plate; several sets of second-stage push plates are arranged in a ring array and movably pass through one end of the second driving cavity near the expansion plate; each set of second-stage push plates is magnetically connected to a corresponding set of first-stage push plates; and the end of each set of second-stage push plates away from the double gear ring is magnetically connected to a corresponding set of expansion plates.

[0015] Furthermore, the opposing sidewalls of each set of pusher blade one and pusher blade two are set as inclined surfaces and slide together; the rotating shaft of each set of intake guide vanes extends into the drive chamber two and is connected to a set of bevel gears through an overrunning clutch; each set of bevel gears is meshed with several sets of helical teeth on the sidewall of the double gear ring.

[0016] Furthermore, the connecting drive mechanism includes a drive block; two sets of elastic support pads are symmetrically arranged on both sides of the side wall of the drive block near the second guide groove; a connecting joint is movably inserted through the side wall of the drive block near the first guide groove; the connecting joint is movably connected to any one set of electromagnetic clutches; a coupling is provided on the side wall of the drive block away from the first guide groove; the coupling is connected to the corresponding secondary centrifugal compression mechanism; two sets of outer rollers are symmetrically arranged on both sides of the side wall of the drive block near the second guide groove.

[0017] Furthermore, each set of outer rollers rolls against the inner wall of guide groove one near guide groove two; two sets of inner rollers are symmetrically arranged on the side wall of the drive block near guide groove two; each set of inner rollers rolls against the inner wall of guide groove two near guide groove one; a guide gear is provided on the side wall of the drive block near guide groove two; the guide gear meshes with the rack.

[0018] The beneficial effects of this invention are:

[0019] 1. The compressed gas is rapidly cooled by passing through the cold ends of several sets of semiconductor heat sinks arranged in a ring array. The hot ends of the semiconductor heat sinks are located in the closed section of the mounting slot and are in close contact with the corresponding inner wall. At this time, the heat dissipation medium flowing at high speed in the cooling channel can quickly remove heat. At the same time, when the surge condition is about to be entered, the cold ends of several sets of semiconductor heat sinks are controlled to rotate towards the inside of the exhaust volute. When the gas flows in the opposite direction, some gas will enter the mounting slot through the semiconductor heat sinks. Then, under the guidance of the closed section, it will impact the main airflow in the opposite direction, forming turbulence in the exhaust volute. This prevents the gas from flowing back to the intake end and forming a surge phenomenon. This improves the working effect of the centrifugal compressor and the cooling efficiency of the high-pressure gas.

[0020] 2. By driving the main gear to rotate at high speed, and with the meshing connection between the main gear, the primary drive gear shaft, and several sets of secondary drive gear shafts, the primary centrifugal compression mechanism and the corresponding sets of secondary centrifugal compression mechanisms work synchronously. The gas is compressed through multi-stage centrifugation, and each set of secondary centrifugal compression mechanisms can move in the guide groove through the connecting drive mechanism and be connected to the corresponding secondary drive gear shaft through the electromagnetic clutch, thereby meeting the needs of different centrifugal speed combinations and improving the flexibility of the centrifugal compressor.

[0021] 3. By controlling the rotation of the double gear ring, and with the meshing connection between the double gear ring and several sets of bevel gears, the rotation angle of several sets of intake guide vanes is adjusted. When the rotation angle of the intake guide vanes is adjusted to the maximum extent, several sets of overrunning clutches are controlled to idle, and the double gear ring is continued to rotate, causing the inclined surface of push plate one to abut against the inclined surface of push plate two. This causes several sets of push plates two to extend from the drive chamber two, pushing several sets of expansion plates to rotate around their respective hinge axes, thereby expanding the intake area and improving the intake efficiency of the centrifugal compressor.

[0022] 4. By controlling the rotation of the guide gear, the drive block can move within the guide groove one under the meshing connection between the guide gear and the rack. By setting the inner roller to roll and fit against the inner wall of the guide groove two, and setting an elastic support pad between the drive block and the inner wall of the guide groove one, the drive block can automatically adapt to the curvature change when moving within the guide groove one. This ensures that the central axis of the coupling can always be aligned with the central axis of the electromagnetic clutch on any secondary drive gear shaft, thereby improving the adjustment convenience of the centrifugal compressor.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of a centrifugal compressor according to an embodiment of the present invention is shown;

[0026] Figure 2 A partial cross-sectional schematic view of a centrifugal compressor according to an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of the primary centrifugal compression mechanism according to an embodiment of the present invention is shown;

[0028] Figure 4 A partial cross-sectional schematic diagram of a primary centrifugal compression mechanism according to an embodiment of the present invention is shown;

[0029] Figure 5 An embodiment of the present invention is shown. Figure 4 An enlarged view of point A;

[0030] Figure 6 A schematic diagram of the intake regulating mechanism according to an embodiment of the present invention is shown;

[0031] Figure 7 A partial cross-sectional schematic diagram of an intake regulating mechanism according to an embodiment of the present invention is shown;

[0032] Figure 8 An embodiment of the present invention is shown. Figure 7 An enlarged view of point B;

[0033] Figure 9 A schematic diagram of the connection drive mechanism according to an embodiment of the present invention is shown.

[0034] In the diagram: 1. Mounting base; 2. Protective housing; 3. Primary centrifugal compression mechanism; 4. Intake regulating mechanism; 5. Guide groove one; 6. Connecting drive mechanism; 7. Secondary centrifugal compression mechanism; 8. Drive chamber one; 9. Main gear; 10. Primary drive gear shaft; 11. Secondary drive gear shaft; 12. Electromagnetic clutch; 13. Guide groove two; 14. Rack; 301. Housing; 302. Intake passage; 303. Exhaust volute; 304. Connecting flange; 305. Centrifugal impeller; 306. Mounting slot; 307. Semiconductor heat sink; 308. Cooling channel; 401. Inlet ring; 402. Inlet guide vane; 403. Expansion plate; 404. Folding baffle; 405. Drive chamber two; 406. Double gear ring; 407. Push plate one; 408. Push plate two; 409. Bevel gear; 601. Drive block; 602. Elastic support pad; 603. Connecting joint; 604. Coupling; 605. Outer roller; 606. Inner roller; 607. Guide gear. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides a multi-axis geared isothermal centrifugal compressor designed to avoid surge, including a mounting base 1. For example,... Figure 1 and Figure 2As shown, the top of the mounting base 1 is provided with a protective shell 2; two sets of primary centrifugal compression mechanisms 3 are symmetrically arranged on the two side walls of the mounting base 1; the air inlet end of each set of primary centrifugal compression mechanisms 3 is connected to a set of air inlet regulating mechanisms 4; two sets of guide grooves 5 are symmetrically opened on the two side walls of the two sets of protective shells 2; the guide grooves 5 are arc-shaped; several sets of connecting drive mechanisms 6 are provided in each set of guide grooves 5; a set of secondary centrifugal compression mechanisms 7 is driven to the end of each set of connecting drive mechanisms 6 away from the guide grooves 5; each set of secondary centrifugal compression mechanisms 7 has the same structure as the primary centrifugal compression mechanism 3; a drive cavity 8 is provided in the mounting base 1 and the protective shell 2; a main gear 9 is provided in the drive cavity 8. The drive chamber 8 is provided with a primary drive gear shaft 10; the primary drive gear shaft 10 is connected to two sets of primary centrifugal compression mechanisms 3; the drive chamber 8 is provided with several sets of secondary drive gear shafts 11 along an arc shape; the number of teeth of the several sets of secondary drive gear shafts 11 decreases sequentially; each set of secondary drive gear shafts 11 is connected to a set of electromagnetic clutches 12 at both ends; the end of each set of electromagnetic clutches 12 away from the main gear 9 extends into a corresponding set of guide grooves 5; each set of guide grooves 15 has a set of guide grooves 13 on the inner wall of the side of the guide grooves 15 closest to the central axis of the main gear 9; each set of guide grooves 13 has a set of racks 14 on the inner wall of the side of the guide grooves 13 closest to the central axis of the main gear 9; the racks 14 are arc-shaped.

[0037] When the centrifugal compressor is working, the exhaust end of the primary centrifugal compression mechanism 3 is connected to several sets of secondary centrifugal compression mechanisms 7 in sequence via gas pipelines. Then, the main gear 9 is driven to rotate at high speed. With the meshing connection between the main gear 9 and the primary drive gear shaft 10 and several sets of secondary drive gear shafts 11, the primary centrifugal compression mechanism 3 and the corresponding sets of secondary centrifugal compression mechanisms 7 work synchronously. The gas is compressed through multi-stage centrifugation. Each set of secondary centrifugal compression mechanisms 7 can move in the guide groove 5 through the connecting drive mechanism 6 and is connected to the corresponding secondary drive gear shaft 11 through the electromagnetic clutch 12. This allows for different combinations of centrifugal speeds and improves the flexibility of the centrifugal compressor.

[0038] For example, such as Figure 3 , Figure 4 and Figure 5As shown, the primary centrifugal compression mechanism 3 includes a housing 301; an air intake channel 302 is provided on one side wall of the housing 301; an exhaust volute 303 is provided on one side wall of the housing 301; pressure sensors are provided in both the air intake channel 302 and the exhaust volute 303; a connecting flange 304 is provided at the end of the exhaust volute 303 away from the housing 301; a centrifugal impeller 305 is provided in the air intake channel 302; and a ring array of [missing information] is distributed on the inner wall of the end of the exhaust volute 303 away from the housing 301. Several sets of mounting slots 306; each set of mounting slots 306 is composite; each set of mounting slots 306 is provided with a set of semiconductor heat sinks 307; the cold end of each set of semiconductor heat sinks 307 is located in the open section of the mounting slot 306; the hot end of each set of semiconductor heat sinks 307 is located in the closed section of the mounting slot 306 and moves against the inner wall of the corresponding side of the mounting slot 306; the exhaust volute 303 has a cooling channel 308 spirally opened near the hot end of the semiconductor heat sink 307.

[0039] When the primary centrifugal compression mechanism 3 is working, the gas enters the intake channel 302 through the intake regulating mechanism 4 and undergoes centrifugal compression under the high-speed rotation of the centrifugal impeller 305. The compressed gas then enters the subsequent centrifugal compression section through the exhaust volute 303. During this process, the gas heats up after compression and is rapidly cooled by the cold ends of several sets of semiconductor heat sinks 307 arranged in a ring array. The hot ends of the semiconductor heat sinks 307 are located within the enclosed section of the mounting groove 306 and are tightly attached to the corresponding inner wall. At this time, the high-speed flow of the heat dissipation medium within the cooling channel 308 rapidly cools the gas. The heat from the hot end of the semiconductor heat sink 307 is dissipated to achieve efficient cooling. At the same time, when the pressure sensor detects that the air pressure at the inlet and outlet is about to reach the surge critical point, it controls the cold ends of several sets of semiconductor heat sinks 307 to rotate inward toward the exhaust volute 303. This causes some gas to enter the mounting groove 306 through the semiconductor heat sink 307 when the gas flows in reverse. Then, under the guidance of the closed section, it impacts the main airflow in the opposite direction, forming turbulence in the exhaust volute 303. This prevents the gas from flowing back to the inlet and causing a surge phenomenon. This improves the working effect of the centrifugal compressor and the cooling efficiency of the high-pressure gas.

[0040] For example, such as Figure 6 , Figure 7 and Figure 8As shown, the intake regulating mechanism 4 includes an intake ring 401; several sets of intake guide vanes 402 are arranged in a ring array inside the intake ring 401; each set of intake guide vanes 402 has an independent rotating shaft; several sets of expansion plates 403 are hinged in a ring array at the end of the intake ring 401 away from the primary centrifugal compression mechanism 3; a set of folding baffles 404 is provided between each pair of adjacent sets of expansion plates 403; a second drive chamber 405 is provided inside the intake ring 401; a double gear ring 406 is provided inside the second drive chamber 405; several sets of push plates 407 are arranged in a ring array on the side wall of the double gear ring 406 near the expansion plate 403; the second drive chamber 405 is located near the expansion plate 403. Near one end of the expansion plate 403, several sets of push plates 408 are arranged in a ring array and move through it; each set of push plates 408 is magnetically connected to a corresponding set of push plates 407; the end of each set of push plates 408 away from the double gear ring 406 is magnetically connected to a corresponding set of expansion plates 403; the opposite sidewalls of each set of push plates 407 and push plates 408 are set as inclined surfaces and slide together; the rotating shaft of each set of intake guide vanes 402 extends into the drive chamber 405 and is connected to a set of bevel gears 409 through an overrunning clutch; each set of bevel gears 409 is meshed with several sets of helical teeth on the sidewall of the double gear ring 406.

[0041] When the primary centrifugal compression mechanism 3 is working, gas can enter the primary centrifugal compression mechanism 3 through the gaps between several sets of intake guide vanes 402. By controlling the rotation of the double gear ring 406, under the meshing connection between the double gear ring 406 and several sets of bevel gears 409, the rotation angle of several sets of intake guide vanes 402 is adjusted. When the rotation angle of the intake guide vanes 402 is adjusted to the maximum extent, several sets of overrunning clutches are controlled to idle, and the double gear ring 406 is continued to rotate, causing the inclined surface of the first push plate 407 to abut against the inclined surface of the second push plate 408. This causes several sets of second push plates 408 to extend from the second drive cavity 405, pushing several sets of expansion plates 403 to rotate around their respective hinge axes, thereby expanding the intake area and improving the intake efficiency of the centrifugal compressor.

[0042] For example, such as Figure 9As shown, the connecting drive mechanism 6 includes a drive block 601; two sets of elastic support pads 602 are symmetrically arranged on both sides of the side wall of the drive block 601 near the guide groove 13; a connecting joint 603 is movably connected through the side wall of the drive block 601 near the guide groove 5; the connecting joint 603 is movably connected to any set of electromagnetic clutches 12; a coupling 604 is provided on the side wall of the drive block 601 away from the guide groove 5; the coupling 604 is connected to the corresponding secondary centrifugal compression mechanism 7; the drive block 601... Two sets of outer rollers 605 are symmetrically arranged on both sides of the side wall near the guide groove 13; each set of outer rollers 605 rolls and adheres to the inner wall of the guide groove 15 near the guide groove 13; two sets of inner rollers 606 are symmetrically arranged on the side wall of the drive block 601 near the guide groove 13; each set of inner rollers 606 rolls and adheres to the inner wall of the guide groove 13 near the guide groove 15; a guide gear 607 is provided on the side wall of the drive block 601 near the guide groove 13; the guide gear 607 meshes with the rack 14.

[0043] During different centrifugal speed combinations, by controlling the rotation of the guide gear 607, the drive block 601 can move within the guide groove 5 under the meshing connection between the guide gear 607 and the rack 14. By setting the inner roller 606 to roll and fit against the inner wall of the guide groove 13, and setting the elastic support pad 602 between the drive block 601 and the inner wall of the guide groove 5, the drive block 601 can automatically adapt to the curvature change when moving within the guide groove 5, so that the central axis of the coupling 603 can always be aligned with the central axis of the electromagnetic clutch 12 on any secondary drive gear shaft 11, thereby improving the adjustment convenience of the centrifugal compressor.

[0044] The compressed gas is rapidly cooled by passing through the cold ends of several sets of semiconductor heat sinks 307 arranged in a ring array. The hot ends of the semiconductor heat sinks 307 are located in the closed section of the mounting groove 306 and are in close contact with the corresponding inner wall. At this time, the heat dissipation medium flowing at high speed in the cooling channel 308 can quickly remove heat. At the same time, when the surge condition is about to be entered, the cold ends of several sets of semiconductor heat sinks 307 are controlled to rotate towards the inside of the exhaust volute 303. When the gas flows in the opposite direction, some gas will enter the mounting groove 306 through the semiconductor heat sinks 307. Then, under the guidance of the closed section, it will impact the main airflow in the opposite direction, forming turbulence in the exhaust volute 303. This prevents the gas from flowing back to the intake end and forming a surge phenomenon. This improves the working effect of the centrifugal compressor and the cooling efficiency of the high-pressure gas.

[0045] By driving the main gear 9 to rotate at high speed, and with the meshing connection between the main gear 9 and the primary drive gear shaft 10 and several sets of secondary drive gear shafts 11, the primary centrifugal compression mechanism 3 and the corresponding sets of secondary centrifugal compression mechanisms 7 work synchronously. The gas is compressed through multi-stage centrifugation, and each set of secondary centrifugal compression mechanisms 7 can move in the guide groove 5 through the connecting drive mechanism 6, and is connected to the corresponding secondary drive gear shaft 11 through the electromagnetic clutch 12, thereby meeting the needs of different centrifugal speed combinations and improving the flexibility of the centrifugal compressor.

[0046] By controlling the rotation of the double gear ring 406, and under the meshing connection between the double gear ring 406 and several sets of bevel gears 409, the rotation angle of several sets of intake guide vanes 402 is adjusted. When the rotation angle of the intake guide vanes 402 is adjusted to the maximum extent, several sets of overrunning clutches are controlled to idle, and the double gear ring 406 is continued to rotate, causing the inclined surface of the first push plate 407 to abut against the inclined surface of the second push plate 408. This causes several sets of second push plates 408 to extend from the second drive cavity 405, pushing several sets of expansion plates 403 to rotate around their respective hinge axes, thereby expanding the intake area and improving the intake efficiency of the centrifugal compressor.

[0047] By controlling the rotation of the guide gear 607, the drive block 601 can move within the guide groove 5 under the meshing connection between the guide gear 607 and the rack 14. By setting the inner roller 606 to roll and fit against the inner wall of the guide groove 13, and setting the elastic support pad 602 between the drive block 601 and the inner wall of the guide groove 5, the drive block 601 can automatically adapt to the curvature change when moving within the guide groove 5, so that the central axis of the coupling 603 can always be aligned with the central axis of the electromagnetic clutch 12 on any secondary drive gear shaft 11, thereby improving the adjustment convenience of the centrifugal compressor.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-axis geared isothermal centrifugal compressor designed to avoid surge, comprising a mounting base, characterized in that: The top of the mounting base is provided with a protective shell; two sets of primary centrifugal compression mechanisms are symmetrically arranged on the two side walls of the mounting base; the air inlet end of each set of primary centrifugal compression mechanisms is connected to a set of air inlet regulating mechanism. The primary centrifugal compression mechanism includes a housing; an exhaust volute is provided on one side wall of the housing; several sets of mounting slots are arranged in a ring array on the inner wall of the end of the exhaust volute away from the housing; each set of mounting slots is composite; each set of mounting slots is provided with a set of semiconductor heat sinks; the cold end of each set of semiconductor heat sinks is located in the open section of the mounting slot. The hot end of each semiconductor heat sink is located within the closed section of the mounting slot and moves against the inner wall of the corresponding side of the mounting slot; the exhaust volute has a cooling channel spirally opened near the hot end of the semiconductor heat sink.

2. The multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 1, characterized in that: Two sets of guide grooves are symmetrically provided on the two side walls of the two sets of protective shells; the guide grooves are arc-shaped; each set of guide grooves is provided with several sets of connecting drive mechanisms; each set of connecting drive mechanisms is connected to a set of secondary centrifugal compression mechanisms at the end away from the guide groove; each set of secondary centrifugal compression mechanisms has the same structure as the primary centrifugal compression mechanism.

3. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 2, characterized in that: The mounting base and protective housing are provided with a drive chamber; the drive chamber is provided with a main gear; the drive chamber is provided with a primary drive gear shaft; the primary drive gear shaft is connected to two sets of primary centrifugal compression mechanisms; the drive chamber is provided with several sets of secondary drive gear shafts along an arc shape; the number of teeth of the several sets of secondary drive gear shafts decreases sequentially.

4. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 3, characterized in that: Each set of secondary drive gear shafts is connected to a set of electromagnetic clutches at both ends; the end of each set of electromagnetic clutches away from the main gear extends into a corresponding set of guide grooves; a set of guide grooves is provided on the inner wall of the side of each set of guide grooves near the central axis of the main gear; a set of racks is provided on the inner wall of the side of each set of guide grooves near the central axis of the main gear; the racks are arc-shaped.

5. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 1, characterized in that: An air intake channel is provided on one side wall of the housing; a pressure sensor is provided in both the air intake channel and the exhaust volute; a connecting flange is provided at the end of the exhaust volute away from the housing; and a centrifugal impeller is provided in the air intake channel.

6. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 2, characterized in that: The intake regulating mechanism includes an intake ring; several sets of intake guide vanes are arranged in a ring array inside the intake ring; each set of intake guide vanes has an independent rotating shaft; several sets of expansion plates are hinged in a ring array at the end of the intake ring away from the primary centrifugal compression mechanism; a set of folding baffles is provided between two adjacent sets of expansion plates; and a second drive chamber is provided inside the intake ring.

7. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 6, characterized in that: The second driving cavity is provided with a double gear ring; several sets of push plates are arranged in a ring array on the side wall of the double gear ring near the expansion plate; several sets of push plates are arranged in a ring array and movably pass through the end of the second driving cavity near the expansion plate; each set of push plates is magnetically connected to a corresponding set of push plates; the end of each set of push plates away from the double gear ring is magnetically connected to a corresponding set of expansion plates.

8. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 7, characterized in that: Each set of pusher blade one and pusher blade two has an opposite sidewall set as an inclined surface, and they slide together; the shaft of each set of intake guide vanes extends into the drive chamber two, and is connected to a set of bevel gears through an overrunning clutch; each set of bevel gears is meshed with several sets of helical teeth on the sidewall of the double gear ring.

9. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 2, characterized in that: The connecting drive mechanism includes a drive block; two sets of elastic support pads are symmetrically arranged on both sides of the side wall of the drive block near the second guide groove; a connecting joint is movably inserted through the side wall of the drive block near the first guide groove; the connecting joint is movably connected to any one set of electromagnetic clutches; a coupling is provided on the side wall of the drive block away from the first guide groove; the coupling is connected to the corresponding secondary centrifugal compression mechanism; two sets of outer rollers are symmetrically arranged on both sides of the side wall of the drive block near the second guide groove.

10. A multi-axis geared isothermal centrifugal compressor for avoiding surge according to claim 9, characterized in that: Each set of outer rollers rolls and adheres to the inner wall of guide groove one near guide groove two; two sets of inner rollers are symmetrically arranged on the side wall of the drive block near guide groove two; each set of inner rollers rolls and adheres to the inner wall of guide groove two near guide groove one; a guide gear is provided on the side wall of the drive block near guide groove two; the guide gear meshes with the rack.

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