A vane adjustment mechanism and centrifugal compressor

Abstract

The application discloses a guide vane adjusting mechanism and a centrifugal compressor, and belongs to the technical field of centrifugal compressors, comprising a plurality of adjustable guide vane assemblies which are arranged at intervals in the circumferential direction of a mounting shell, wherein the adjustable guide vane assemblies comprise guide vane mechanisms and adjusting assemblies which are connected in pairs, the adjusting assemblies are connected in pairs with the guide vane mechanisms, and the adjusting assemblies can drive the corresponding guide vane mechanisms to adjust the angles. According to the application, the adjusting assemblies are connected in pairs with the guide vane mechanisms, independent and accurate regulation and control of each guide vane mechanism is realized, the angle of each guide vane mechanism can be adjusted individually according to real-time requirements, the medium flow state under different working conditions can be adapted more carefully, and the uniformity and stability of the medium are effectively optimized.

Description

Technical Field

[0001] This invention relates to the field of centrifugal compressor technology, and more specifically to a guide vane adjustment mechanism and a centrifugal compressor. Background Technology

[0002] To reduce the initial investment and long-term maintenance costs of compressor units, centrifugal compressors widely adopt guide vane adjustment technology. By changing the direction of airflow at the impeller inlet, the performance of the entire machine is adjusted to meet the needs of multiple operating conditions. Compared with electrified variable speed regulation that requires a frequency converter and throttling regulation with large power loss, it has more economic advantages.

[0003] Existing technical solutions, such as multi-link or gear transmission, which are centralized drive structures with one input to multiple outputs, have advantages such as good synchronization and simple control logic. However, their drawbacks are particularly prominent in large compressor applications: First, the structure cannot independently monitor the specific opening of each guide vane, and damage to individual guide vane transmission components is difficult to detect visually, affecting the reliability of system operation. Second, when the mechanical structure transmits the torque of each guide vane, the additional torque demand generated by friction and the balancing force required to change the direction of the force result in huge additional torque loss, leading to reduced regulation efficiency. This also forces the system to use a more powerful driver and more robust transmission components, thereby increasing costs and structural complexity. This invention proposes a new solution to address the above problems. Summary of the Invention

[0004] To overcome at least one of the aforementioned drawbacks, this invention provides a guide vane adjusting mechanism and a centrifugal compressor. The objective of this invention can be achieved by employing the following technical solution: In a first aspect, this application provides a guide vane adjustment mechanism, including a plurality of adjustable guide vane assemblies spaced apart circumferentially along a mounting shell. Each adjustable guide vane assembly includes a guide vane mechanism and an adjustment component connected to each other. The adjustment component is connected to each guide vane mechanism in a one-to-one correspondence, and the adjustment component can drive the corresponding guide vane mechanism to adjust its angle.

[0005] In one possible implementation, the guide vane mechanism includes a guide vane body and a guide vane extension shaft connected together. The guide vane body is located on one side of the mounting housing, and the adjustment component is located on the other side of the mounting housing. The guide vane body is poweredly connected to the adjustment component through the guide vane extension shaft passing through the mounting housing.

[0006] In one possible implementation, the adjustment component includes a drive mechanism, one end of the guide vane extension shaft is connected to the guide vane mechanism, and the other end is connected to the output end of the drive mechanism. The drive mechanism drives the guide vane body to rotate through the guide vane extension shaft.

[0007] In one possible implementation, the drive mechanism includes a brushless torque motor, which includes any one of a direct drive motor, a joint motor, or a servo motor and a speed reducer.

[0008] In one possible implementation, the adjustment assembly further includes a fixing bolt for securing the drive mechanism to the mounting housing.

[0009] In one possible embodiment, the adjusting assembly further includes a rotary sealing mechanism disposed at the penetration point between the guide vane extension shaft and the mounting housing. The rotary sealing mechanism includes an inner liner, a self-lubricating bearing, and a sealing structure. The inner liner is sleeved on the outside of the guide vane extension shaft, and the self-lubricating bearing is disposed between the inner liner and the guide vane extension shaft. Sealing structures are provided between the self-lubricating bearing and the inner liner, and between the inner liner and the mounting housing.

[0010] In one possible implementation, the guide vane adjustment mechanism further includes a controller, which is electrically connected to the adjustment component and is used to acquire real-time status parameters of each guide vane mechanism and send adjustment commands to the corresponding adjustment component according to the real-time status parameters.

[0011] In one possible implementation, the adjustment component includes an encoder feedback system, which is used to monitor the rotation angle of the guide vane mechanism in real time and feed back the monitoring data. The controller includes a closed-loop control logic module, which dynamically corrects the rotation angle of the guide vane mechanism based on the monitoring data and generates corresponding adjustment commands. The drive mechanism drives the guide vane mechanism to rotate a preset angle along a preset direction according to the adjustment commands.

[0012] In one possible implementation, the guide vane adjustment mechanism further includes a remote control room, which is electrically connected to the controller and is used to receive real-time status data of the guide vane mechanism transmitted by the controller and send remote adjustment commands to the controller.

[0013] A second aspect of this application provides a centrifugal compressor, including any of the guide vane adjustment mechanisms of the first aspect.

[0014] The beneficial technical effects of the present invention are as follows: According to the present disclosure, the guide vane adjustment mechanism and the centrifugal compressor connect the adjustment components to the guide vane mechanism one by one, realizing independent and precise control of each guide vane mechanism. Each guide vane mechanism can adjust its angle individually according to real-time needs, which can more meticulously adapt to the medium flow state under different working conditions and effectively optimize the uniformity and stability of the medium. Attached Figure Description

[0015] The following are given by way of example and without limitation in the accompanying drawings: Figure 1 A three-dimensional structural view of the axial guide vane adjustment mechanism according to an embodiment of the present invention is shown; Figure 2 A front view of the axial guide vane adjustment mechanism according to an embodiment of the present invention is shown; Figure 3 A structural side view of the axial guide vane adjustment mechanism according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the logical structure of the axial guide vane according to an embodiment of the present invention is shown; Figure 5 It shows Figure 4 Enlarged schematic diagram of part A; Figure 6 A schematic diagram of the radial guide vane logic structure according to an embodiment of the present invention is shown; Figure 7 It shows Figure 6 Enlarged schematic diagram of part of the structure; Figure 8 A perspective view of the radial guide vane adjustment mechanism at one angle according to an embodiment of the present invention is shown; Figure 9 A perspective view of the axial guide vane adjustment mechanism of an embodiment of the present invention is shown from another angle; Figure 10 A structural side view of the axial guide vane adjustment mechanism according to an embodiment of the present invention is shown.

[0016] In the diagram: 1. Mounting housing; 2. Adjustable guide vane assembly; 21. Adjustment assembly; 211. Drive mechanism; 212. Fixing bolt; 213. Rotary sealing mechanism; 2131. Liner; 2132. Self-lubricating bearing; 2133. Sealing structure; 22. Guide vane mechanism; 221. Guide vane body; 222. Guide vane extension shaft; 3. Controller; 4. Remote control room. Detailed Implementation

[0017] In the following detailed disclosure, these embodiments are fully described with reference to the accompanying drawings. In order to enable those skilled in the art to understand and clarify the technical solution of the present invention more clearly, the embodiments described below are not limited thereto. The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0018] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] The first aspect of this application, as Figures 1-10 As shown, a guide vane adjustment mechanism is provided, including a plurality of adjustable guide vane assemblies 2 arranged circumferentially along the mounting shell 1. Each adjustable guide vane assembly 2 includes a guide vane mechanism 22 and an adjustment assembly 21 connected to each other. The adjustment assembly 21 is connected to the guide vane mechanism 22 in a one-to-one correspondence, and the adjustment assembly 21 can drive the corresponding guide vane mechanism 22 to adjust the angle.

[0021] The guide vane adjustment mechanism provided in this embodiment achieves independent and precise control of each guide vane mechanism 22 by connecting the adjustment component 21 to the guide vane mechanism 22 in a one-to-one correspondence. Each guide vane mechanism 22 can adjust its angle individually according to real-time requirements, which can more meticulously adapt to the medium flow state under different working conditions and effectively optimize the uniformity and stability of the medium.

[0022] Understandably, the independently adjustable structural design allows for the maintenance and repair of individual guide vanes without affecting the entire system, reducing maintenance difficulty and downtime, and significantly improving the maintainability of the equipment.

[0023] In one possible implementation, such as Figure 4 and Figure 5 As shown, the guide vane mechanism 22 includes a guide vane body 221 and a guide vane extension shaft 222 connected to each other. The guide vane body 221 is located on one side of the mounting shell 1, and the adjustment component 21 is located on the other side of the mounting shell 1. The guide vane body 221 is connected to the adjustment component 21 through the guide vane extension shaft 222 through the mounting shell 1.

[0024] In this embodiment, the guide vane mechanism 22 achieves a power connection between the inner guide vane body 221 and the outer adjustment component 21 through the guide vane extension shaft 222 penetrating the mounting shell 1. The guide vane body 221 is independently arranged inside the mounting shell 1 and can directly act on the flowing medium, maximizing the control of the medium's flow direction and velocity, while avoiding structural interference with the adjustment component 21 and ensuring the smoothness of the medium flow channel. The adjustment component 21 is located outside the mounting shell 1, which is far away from the medium flow area, reducing the erosion and wear of the adjustment components by the medium and extending the service life of the adjustment mechanism. It also provides sufficient operating space for the installation, debugging and subsequent maintenance of the adjustment component 21, reducing maintenance difficulty and cost.

[0025] Understandably, the through-type connection structure of the guide vane extension shaft 222 ensures that the power transmission of the adjustment component 21 to the guide vane body 221 is precise and efficient, and can quickly respond to adjustment commands to realize timely adjustment of the guide vane angle, effectively improving the sensitivity and reliability of guide vane adjustment, thereby ensuring the overall stability and adaptability of the compressor operation.

[0026] In one possible implementation, such as Figures 4-7 As shown, the adjustment component 21 includes a drive mechanism 211. One end of the guide vane extension shaft 222 is connected to the guide vane mechanism 22, and the other end is connected to the output end of the drive mechanism 211. The drive mechanism 211 drives the guide vane body 221 to rotate through the guide vane extension shaft 222.

[0027] In this embodiment, the adjustment component 21 establishes a direct power connection between the drive mechanism 211 and the guide vane mechanism 22 through the guide vane extension shaft 222, which simplifies the power transmission path. The output end of the drive mechanism 211 is precisely connected to the guide vane extension shaft 222, which can transmit power to the guide vane mechanism 22 without loss, ensuring that the rotation response of the guide vane body 221 is rapid and the angle adjustment is accurate, effectively improving the sensitivity and reliability of the guide vane adjustment.

[0028] This direct-drive structure greatly simplifies the overall construction of the adjustment component 21, reduces intermediate transmission links, reduces unnecessary frictional torque loss caused by traditional complex mechanical structures, solves the problem of excessively large actuator specifications due to excessive total torque in large units, and avoids the increased cost of strengthening transmission components due to excessive stress.

[0029] The through-type design of the guide vane extension shaft 222 not only achieves physical isolation between the functional areas inside and outside the mounting shell 1, keeping the drive mechanism 211 away from the medium flow area, reducing the impact of medium erosion, dust pollution and other factors on the drive components, and extending the service life of the drive mechanism 211, but also avoids the drive components occupying and interfering with the internal flow channel.

[0030] Among them, such as Figures 1-5 As shown, when the guide vane mechanism 22 uses axial guide vanes, its blade rotation axis is perpendicular to the compressor main shaft. To achieve adjustment of the axial velocity and direction of the airflow, the axial guide vanes are usually installed on the side of the compressor inlet air passage. Therefore, the mounting housing 1 has a cylindrical side structure, and the guide vane array is arranged circumferentially on this cylindrical surface. The drive mechanism 211 is directly mounted on the outer surface of the cylinder, and its output end is directly connected to the guide vane extension shaft 222 to achieve power connection. The guide vane extension shaft 222 needs to penetrate the side wall of the cylinder to transmit rotational power to the blade body 221 of the axial guide vane inside the mounting housing 1.

[0031] Among them, such as Figures 6-10 As shown, when the guide vane mechanism 22 uses radial guide vanes, its blade rotation axis is parallel to the compressor main shaft, mainly used to change the tangential velocity component of the airflow entering the impeller. Radial guide vanes are typically installed on the radial plane of the impeller inlet, i.e., at the end face of the compressor casing. Therefore, the mounting housing 1 needs to include an end face perpendicular to the main shaft. The drive mechanism 211 is installed on the outer surface of this end face, and its output shaft is directly connected to the guide vane extension shaft 222 to achieve power connection. The guide vane extension shaft 222 needs to penetrate this end face to transmit power to the blade body 221 of the radial guide vane located inside the mounting housing 1.

[0032] In one possible implementation, the drive mechanism 211 includes a brushless torque motor, which includes any one of a direct drive motor, a joint motor or a servo motor and a speed reducer.

[0033] In this embodiment, the drive mechanism 211 uses a brushless torque motor as the power source. The direct-drive load design of the brushless torque motor eliminates the intermediate transmission components in the traditional non-direct-drive structure, completely avoiding the problems of lag, deformation and wear caused by the transmission link. This makes the power transmission path more direct, the response of adjustment commands more rapid, and the adjustment of the guide vane angle can accurately meet the control requirements. The brushless torque motor itself, such as the direct-drive motor, articulated motor or servo motor and reducer, has a high-resolution encoder feedback system with a resolution of hundreds of thousands to millions of pulses per revolution. It can accurately capture the tiny angle changes of the guide vane mechanism 22, providing real-time and accurate status data for the adjustment process. This ensures that every angle adjustment is within the controllable range and avoids adjustment deviations caused by feedback lag or data errors.

[0034] Understandably, the stable output characteristics of the brushless torque motor, combined with the low-loss advantage of the direct-drive structure, further ensure the stability of the guide vane adjustment process, effectively reducing the probability of failure during long-term operation. This not only improves the overall operating efficiency of the compressor but also reduces the cost and frequency of later maintenance.

[0035] In one possible implementation, such as Figures 4-7As shown, the adjustment assembly 21 also includes a fixing bolt 212, which is used to fix the drive mechanism 211 to the mounting housing 1.

[0036] The drive mechanism 211 is mounted on the mounting shell 1 by fixing bolts 212. The drive mechanism 211 is firmly fixed to the outside of the mounting shell 1 by the bolt connection structure, so as to avoid displacement of the drive mechanism 211 due to its own vibration or power transmission during operation, and to ensure that the docking accuracy between the output end of the drive mechanism 211 and the guide vane extension shaft 222 is always stable.

[0037] Understandably, bolted connections offer excellent disassembly capabilities. When the drive mechanism 211 requires maintenance or replacement, the disassembly and assembly of components can be quickly completed by removing the fixing bolts 212, without requiring extensive modifications to the mounting housing 1 or other structures, effectively reducing maintenance difficulty and costs.

[0038] In one possible implementation, such as Figures 4-7 As shown, the adjustment assembly 21 also includes a rotating sealing mechanism 213. The rotating sealing mechanism 213 is disposed at the penetration point between the guide vane extension shaft 222 and the mounting shell 1. The rotating sealing mechanism 213 includes an inner liner 2131, a self-lubricating bearing 2132 and a sealing structure 2133. The inner liner 2131 is sleeved on the outside of the guide vane extension shaft 222. The self-lubricating bearing 2132 is disposed between the inner liner 2131 and the guide vane extension shaft 222. Sealing structures 2133 are provided between the self-lubricating bearing 2132 and the inner liner 2131, and between the inner liner 2131 and the mounting shell 1.

[0039] The rotating sealing mechanism 213, which is located at the point where the guide vane extension shaft 222 passes through the mounting shell 1, enhances the structural performance and operational stability of the guide vane adjustment mechanism through the coordinated cooperation of the inner liner 2131, the self-lubricating bearing 2132, and the sealing structure 2133.

[0040] Specifically, the inner liner 2131 is installed at the hole in the mounting shell 1 and sleeved on the outside of the guide vane extension shaft 222, providing initial protection for the guide vane extension shaft 222. The self-lubricating bearing 2132 is located between the inner liner 2131 and the guide vane extension shaft 222. With its self-lubricating properties, it effectively reduces the frictional resistance when the guide vane extension shaft 222 rotates, making the guide vane angle adjustment smoother. This improves the adjustment response speed, reduces wear and tear between components, and extends the service life of the guide vane extension shaft 222 and the mounting shell 1. The sealing structures 2133, respectively installed between the self-lubricating bearing 2132 and the inner liner 2131, and between the inner liner 2131 and the mounting shell 1, form a double sealing barrier. This effectively prevents the medium inside the mounting shell 1 from leaking to the outside, while preventing external dust and impurities from entering the internal flow channel or bearing area. This avoids the decrease in operating efficiency caused by medium leakage, as well as component jamming and damage caused by impurities. It comprehensively ensures the reliable operation of the guide vane adjustment mechanism and the overall sealing of the compressor.

[0041] Understandably, the sealing structure 2133 can adopt sealing forms such as one-way spring energy storage seal ring, general O-ring and sealing packing, so as to ensure dynamic sealing performance and adapt to the reliability requirements under different working conditions, thus ensuring the sealing integrity and functional reliability of the regulating component 21 under complex operating conditions.

[0042] Among them, the one-way spring energy storage seal ring is composed of a metal spring and a polymer jacket. Its core is the continuous radial elastic force provided by the spring, which can automatically compensate for the gap when the system pressure changes or the material wears, maintain a stable sealing contact pressure, effectively cope with adverse factors such as eccentricity and vibration, and significantly improve the seal's self-adaptability and long-term stability.

[0043] Among them, the general-purpose O-ring relies on the pre-compression deformation during installation to achieve initial sealing. It has a simple structure and low cost, and is suitable for static sealing and low-speed dynamic sealing scenarios. Its elastic material can uniformly conform to the groove wall after being compressed to form a reliable bidirectional seal. It has high requirements for processing accuracy and assembly, but exhibits good sealing consistency and maintainability under normal working conditions.

[0044] The sealing packing expands radially through axial compression, making the packing tightly fit the shaft surface and cavity wall, forming a labyrinthine leakage channel. It can work continuously in harsh environments such as high pressure and high temperature. Although it requires regular maintenance, it has strong fault tolerance and adaptability to working conditions.

[0045] In one possible implementation, such as Figure 4 and Figure 6As shown, the guide vane adjustment mechanism also includes a controller 3, which is electrically connected to the adjustment component 21. The controller 3 is used to acquire the real-time status parameters of each guide vane mechanism 22 and send adjustment commands to the corresponding adjustment component 21 according to the real-time status parameters.

[0046] The controller 3 is electrically connected to the adjustment component 21. The controller 3 can obtain the status parameters of each guide vane mechanism 22 in real time and accurately, without being affected by mechanical transmission lag or signal interference. This ensures that the perception of the guide vane's operating status is always clear and accurate. The adjustment command generated based on the real-time status parameters is directly transmitted to the corresponding adjustment component 21 through the electrical signal, eliminating the intermediate mechanical transmission link. This not only greatly improves the response speed of guide vane angle adjustment, but also enables independent and precise control of each guide vane.

[0047] Understandably, the structural design of the electrical signal connection makes the layout of the entire adjustment mechanism more flexible. The controller 3 can be placed in a suitable position according to actual needs, without being limited by the installation space of the adjustment component 21. This not only optimizes the compactness of the overall structure, but also provides convenience for later maintenance and upgrades, effectively improving the overall performance and adaptability of the guide vane adjustment mechanism.

[0048] In one possible implementation, the adjustment component 21 includes an encoder feedback system, which is used to monitor the rotation angle of the guide vane mechanism 22 in real time and feed back the monitoring data; the controller 3 includes a closed-loop control logic module, which dynamically corrects the rotation angle of the guide vane mechanism 22 according to the monitoring data and generates a corresponding adjustment command, and the drive mechanism 211 drives the guide vane mechanism 22 to rotate a preset angle along a preset direction according to the adjustment command.

[0049] The complete adjustment link, consisting of the encoder feedback system, closed-loop control logic module, and drive mechanism 211, enables precise and intelligent adjustment of the guide vane mechanism 22. The encoder feedback system, as the front-end sensing unit, can capture real-time changes in the rotation angle of the guide vane mechanism 22, providing accurate status information for the entire adjustment process and avoiding adjustment deviations caused by lag or error in status perception in traditional adjustment methods. The closed-loop control logic module, as the core control hub, quickly calculates and generates adjustment commands based on feedback data. By dynamically correcting the guide vane rotation angle, it ensures the guide vane is always in the optimal working position, effectively improving the control accuracy of the guide vane on the medium flow state and thus optimizing the compressor's operating efficiency. The drive mechanism 211 directly responds to the adjustment commands, driving the guide vane to rotate along a preset direction to a specified angle. Direct connection between command and execution reduces energy loss and error accumulation in intermediate transmission links, ensuring the timeliness and accuracy of the adjustment action. This not only significantly improves the response speed and control accuracy of the guide vane adjustment but also reduces mechanical wear during long-term operation, extending the service life of the adjustment mechanism and providing a reliable guarantee for the stable and efficient operation of the compressor.

[0050] In one possible implementation, such as Figure 4 and Figure 6 As shown, the guide vane adjustment mechanism also includes a remote control room 4, which is electrically connected to the controller 3. The remote control room 4 is used to receive the real-time status data of the guide vane mechanism 22 transmitted by the controller 3 and send remote adjustment commands to the controller 3.

[0051] The remote control room 4 is electrically connected to the controller 3. Through the remote control room 4, the status data of all guide vane mechanisms 22 can be obtained in real time, breaking the spatial limitations of on-site monitoring. Maintenance personnel do not need to face the complex environment of equipment operation to fully grasp the key status of guide vane angle changes, adjustment response, etc., and realize full-process visual supervision of guide vane adjustment. The remote control room 4 can directly send adjustment commands to the controller 3. The commands are transmitted directly to the drive mechanism 211 through a stable electrical signal transmission path, accurately driving the guide vane to complete the angle adjustment. This not only avoids the safety risks of on-site operation, but also enables unified scheduling and optimization of the guide vane adjustment status of multiple compressors with the help of remote centralized management and control capabilities, greatly improving adjustment efficiency and equipment operation stability.

[0052] The second aspect of this application, as Figures 1-7 As shown, a centrifugal compressor is provided, including any of the guide vane adjustment mechanisms in the first aspect.

[0053] The centrifugal compressor provided in this embodiment integrates the aforementioned guide vane adjustment mechanism, constructing a closed-loop control system at the structural level that covers the entire chain from monitoring and decision-making to execution. By directly coupling the precision encoder feedback system with the drive mechanism 211, real-time monitoring and high-precision dynamic correction of the rotation angle of the guide vane mechanism 22 are achieved. This ensures that the adjustment command can accurately drive the guide vane to rotate to the preset angle, enabling the compressor to respond quickly and maintain optimal intake conditions when operating conditions change. This significantly improves the sensitivity and stability of airflow adjustment, not only optimizing the uniformity of medium flow and widening the stable operating range of the compressor, but also enhancing the adaptability of the whole machine to different operating conditions through structural compactness and high reliability, thereby effectively improving the overall operating efficiency and performance of the centrifugal compressor.

[0054] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0056] In view of the detailed description above, these and other changes can be made to these embodiments, and this written description includes embodiments of the best mode that disclose the invention. The patent scope of the invention is defined by the claims, which are not limited by this disclosure. The scope of protection of the invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the invention disclosed herein, based on the technical solutions and concepts of the invention, are within the scope of protection of the invention.

Claims

1. A guide vane adjustment mechanism, characterized in that, It includes several adjustable guide vane assemblies (2) arranged circumferentially along the mounting shell (1). Each adjustable guide vane assembly (2) includes a guide vane mechanism (22) and an adjustment component (21) connected to each other. The adjustment component (21) is connected to the guide vane mechanism (22) in a one-to-one correspondence. The adjustment component (21) can drive the corresponding guide vane mechanism (22) to adjust the angle.

2. The guide vane adjusting mechanism according to claim 1, characterized in that, The guide vane mechanism (22) includes a guide vane body (221) and a guide vane extension shaft (222) connected to each other. The guide vane body (221) is located on one side of the mounting shell (1), and the adjustment component (21) is located on the other side of the mounting shell (1). The guide vane body (221) is connected to the adjustment component (21) through the guide vane extension shaft (222) passing through the mounting shell (1).

3. The guide vane adjusting mechanism according to claim 2, characterized in that, The adjustment component (21) includes a drive mechanism (211). One end of the guide vane extension shaft (222) is connected to the guide vane mechanism (22), and the other end is connected to the output end of the drive mechanism (211). The drive mechanism (211) drives the guide vane body (221) to rotate through the guide vane extension shaft (222).

4. The guide vane adjusting mechanism according to claim 3, characterized in that, The drive mechanism (211) includes a brushless torque motor, which includes any one of a direct drive motor, a joint motor or a servo motor and a speed reducer.

5. The guide vane adjusting mechanism according to claim 3, characterized in that, The adjustment assembly (21) further includes a fixing bolt (212) for fixing the drive mechanism (211) to the mounting housing (1).

6. The guide vane adjusting mechanism according to claim 3, characterized in that, The adjustment assembly (21) further includes a rotary sealing mechanism (213), which is disposed at the penetration point between the guide vane extension shaft (222) and the mounting shell (1). The rotary sealing mechanism (213) includes an inner liner (2131), a self-lubricating bearing (2132), and a sealing structure (2133). The inner liner (2131) is sleeved on the outside of the guide vane extension shaft (222). The self-lubricating bearing (2132) is disposed between the inner liner (2131) and the guide vane extension shaft (222). Sealing structures (2133) are provided between the self-lubricating bearing (2132) and the inner liner (2131) as well as between the inner liner (2131) and the mounting shell (1).

7. The guide vane adjusting mechanism according to claim 1, characterized in that, It also includes a controller (3), which is electrically connected to the adjustment component (21) to obtain the real-time status parameters of each guide vane mechanism (22) and send adjustment commands to the corresponding adjustment component (21) according to the real-time status parameters.

8. The guide vane adjusting mechanism according to claim 7, characterized in that, The adjustment component (21) includes an encoder feedback system, which is used to monitor the rotation angle of the guide vane mechanism (22) in real time and feed back the monitoring data. The controller (3) includes a closed-loop control logic module. The closed-loop control logic module dynamically corrects the rotation angle of the guide vane mechanism (22) according to the monitoring data and generates a corresponding adjustment command. The adjustment component (21) drives the guide vane mechanism (22) to rotate a preset angle along a preset direction according to the adjustment command.

9. The guide vane adjusting mechanism according to claim 7, characterized in that, It also includes a remote control room (4), which is electrically connected to the controller (3) and is used to receive the real-time status data of the guide vane mechanism (22) transmitted by the controller (3) and send remote adjustment commands to the controller (3).

10. A centrifugal compressor, characterized in that, Includes the guide vane adjustment mechanism as described in any one of claims 1-9.

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