A blade adjustment device and a compressor

Abstract

The application discloses a vane adjusting device and a compressor. The vane adjusting device is applied to the compressor, the compressor comprises a casing, a hub located on the inner side of the casing, and vanes arranged between the casing and the hub. The vane adjusting device comprises an actuating mechanism, a linkage ring, a rocker arm, and a knuckle bearing. The actuating mechanism is used for driving the linkage ring to rotate along the circumference of the linkage ring. The first end of the rocker arm is connected with the journal of the vane. The second end of the rocker arm is rotatably connected with the linkage ring through the knuckle bearing. The second end of the rocker arm is slidably connected with the knuckle bearing. The vane adjusting device provided by the application can simplify the motion of adjusting the installation angle of the vane, improve the transmission efficiency of the vane adjusting process, and improve the design precision of adjusting the installation angle of the vane.

Description

Technical Field

[0001] This application relates to the field of aero-engine technology, and in particular to a blade adjustment device and a compressor. Background Technology

[0002] To ensure stable operation of the compressor in the engine, the compressor flow rate needs to be adjusted according to the actual operating conditions. Therefore, the stator blades in the compressor are made into an adjustable structure. The stator blades are rotated by the blade adjustment device, and the compressor flow rate is adjusted by changing the installation angle of the stator blades.

[0003] However, the existing blade adjustment device involves a series of complex three-dimensional spatial movements, which results in low design accuracy when adjusting the installation angle of the stator blade. At the same time, the low transmission efficiency of the blade adjustment process also affects the stability and reliability of the blade adjustment. Summary of the Invention

[0004] The purpose of this application is to provide a blade adjustment device and a compressor to simplify the movement of adjusting the blade installation angle, improve the transmission efficiency of blade adjustment, and enhance the design accuracy of the blade installation angle.

[0005] To achieve the above objectives, this application provides a blade adjustment device applied to a compressor. The compressor includes a casing, a hub, and blades disposed between the casing and the hub. The hub is located inside the casing. The blade adjustment device includes an actuating mechanism, a linkage ring, a rocker arm, and a spherical bearing. The actuating mechanism drives the linkage ring to rotate circumferentially along the linkage ring. The first end of the rocker arm is connected to the journal of the blade, and the second end of the rocker arm is rotatably connected to the linkage ring through the spherical bearing. The second end of the rocker arm is slidably connected to the spherical bearing.

[0006] Compared with the prior art, in the blade adjustment device provided in this application, the actuating mechanism drives the linkage ring to rotate circumferentially along the linkage ring. The linkage ring and the second end of the rocker arm are rotatably connected through a spherical bearing. Therefore, when the actuating mechanism drives the linkage ring to rotate circumferentially along the linkage ring, the linkage ring can drive the second end of the rocker arm to move. Because the first end of the rocker arm is connected to the journal of the blade, when the linkage ring drives the second end of the rocker arm to move, the first end of the rocker arm can drive the journal of the blade to rotate, thereby adjusting the installation angle of the blade.

[0007] Meanwhile, in the blade adjustment device provided in this application, during the blade adjustment process, the linkage ring rotates only around its own circumference. The linkage ring drives the second end of the rocker arm to move. Because the first end of the rocker arm is connected to the blade journal, and the second end of the rocker arm is rotatably connected to the linkage ring through a spherical bearing, the position of the first end of the rocker arm remains fixed, and the spherical bearing rotates circumferentially with the linkage ring. However, in this application, the second end of the rocker arm is slidably connected to the spherical bearing. During the blade adjustment process, the second end of the rocker arm can generate relative displacement with the spherical bearing to compensate for the change in distance between the first end of the rocker arm and the center point of the spherical bearing. During the blade adjustment process, the movement of the linkage ring and the rocker arm can be simplified to planar motion, simplifying the movement for adjusting the blade installation angle and improving the design accuracy of blade adjustment. Furthermore, because the linkage ring rotates only around its own circumference, the distance between the axis of the blade journal and the linkage ring remains unchanged. Therefore, the size of the transmission arm during the blade adjustment process remains constant, reducing torque loss, improving transmission efficiency, and ensuring the stability and reliability of blade adjustment.

[0008] This application also provides a compressor, including a casing, a hub, blades, and a blade adjustment device of the above-described technical solution. The hub is located inside the casing, the blades are disposed between the casing and the hub, and the blade adjustment device includes a rocker arm connected to the journal of the blade.

[0009] Compared with the prior art, the beneficial effects of the compressor provided in this application are the same as those of the blade adjustment device described in the above technical solution, and will not be repeated here. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0011] Figure 1 A schematic diagram of the blade adjustment device structure of an exemplary embodiment of this application is shown;

[0012] Figure 2 A partially enlarged structural schematic diagram of the blade adjustment device according to an exemplary embodiment of this application is shown;

[0013] Figure 3 A schematic diagram of the assembly structure of the rocker arm and linkage ring according to an exemplary embodiment of this application is shown;

[0014] Figure 4 This invention provides a schematic diagram of the linkage ring and blades after adjustment, representing an exemplary embodiment of the present application.

[0015] Figure 5This invention provides a schematic diagram showing the position of the center point of the joint bearing before and after adjusting the blade, according to an exemplary embodiment of this application.

[0016] Figure 6 A schematic diagram of the motion trajectory of a joint bearing according to an exemplary embodiment of this application is shown;

[0017] Figure 7 A schematic diagram of the assembly structure of the journal and adapter structure of an exemplary embodiment of this application is shown.

[0018] Figure label:

[0019] 100-Casing, 110-First raceway groove, 200-Hub, 300-Blade, 310-Jirder, 320-Transfer structure, 321-Rotating assembly, 400-Actuating mechanism, 410-Drive motor, 420-Linear motion mechanism, 421-Lead screw, 422-First support, 430-Flexible coupling, 440-Second support, 500-Linkage ring, 510-Linkage ring body, 521-Mounting hole, 511-Second raceway groove, 520-Linkage ring cover plate, 600-Rocker arm, 700-Spherical plain bearing, 710-Inner ring, 720-Outer ring, 800-Raceway bearing, 900-Support bearing, 910-Bearing cover plate. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", 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 application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Figure 1 A schematic diagram of the blade adjustment device structure of an exemplary embodiment of this application is shown. Figure 2 A partially enlarged structural schematic diagram of the blade adjusting device according to an exemplary embodiment of this application is shown. Figure 1 and Figure 2 This application provides a compressor, including a casing 100, a hub 200, blades 300, and a blade adjustment device, which can adjust the installation angle of the blades 300.

[0026] like Figure 1 As shown, in this embodiment, the hub 200 is located inside the housing 100, and the blade 300 can be located between the housing 100 and the hub 200. The blade adjustment device is connected to the journal 310 of the blade 300, and can control the rotation of the journal 310 of the blade 300 to adjust the installation angle of the blade 300. The blade adjustment device has simple adjustment action, high transmission efficiency, and high blade adjustment accuracy.

[0027] like Figure 1 and Figure 2 As shown, the blade adjusting device of this application embodiment includes: an actuating mechanism 400, a linkage ring 500, a rocker arm 600, and a joint bearing 700. The actuating mechanism 400 is used to drive the linkage ring 500 to rotate circumferentially. It should be understood that the actuating mechanism 400 drives the linkage ring 500 to move, and the linkage ring 500 can only rotate circumferentially, while the linkage ring 500 does not move axially.

[0028] In practical use, the linkage ring 500 can be slidably fitted onto the outer peripheral wall of the housing 100. A limiting mechanism can be provided on the outside of the housing 100 to ensure that the linkage ring 500 can only rotate circumferentially and cannot move axially. For example, the limiting mechanism may include an annular guide groove provided on the outer peripheral wall of the housing 100. The linkage ring 500 slides in contact with the bottom of the annular guide groove, and the groove wall restricts the linkage ring 500 from moving axially.

[0029] Figure 3 A schematic diagram of the assembly structure of the rocker arm and linkage ring according to an exemplary embodiment of this application is shown. Figure 3 As shown, the first end of the rocker arm 600 can be connected to the journal 310 of the blade 300. Here, the first end of the rocker arm 600 can be rotatably connected to the connecting hole of the journal 310 through a clearance fit between the connecting pin or other connecting parts.

[0030] When there are multiple blades 300, they can be arranged circumferentially between the housing 100 and the hub 200. In this case, the journal 310 of each blade 300 is connected to the first end of a rocker arm 600. The second end of the rocker arm 600 can be rotatably connected to the linkage ring 500 via a spherical bearing 700. It should be understood that when multiple blades 300 are arranged circumferentially between the housing 100 and the hub 200, because the journal 310 of each blade 300 is connected to the first end of a rocker arm 600, the journals 310 of multiple blades 300 are connected to multiple rocker arms 600. In this case, the second ends of multiple rocker arms 600 are all rotatably connected to the linkage ring 500 via spherical bearings 700. Thus, when the actuating mechanism drives the linkage ring 500 to rotate circumferentially, the linkage ring 500 can drive the journals 310 of multiple blades 300 to rotate simultaneously, thereby achieving synchronous adjustment of the installation angle of multiple blades.

[0031] The second end of the rocker arm 600 is slidably connected to the spherical bearing 700. At this time, the second end of the rocker arm 600 can slide relative to the spherical bearing 700, changing the distance from the second end of the rocker arm 600 to the center point Cj of the spherical bearing.

[0032] In practical use, such as Figure 3 As shown, the spherical bearing 700 may include an inner ring 710 and an outer ring 720. The inner ring 710 and the outer ring 720 are fitted together and are concentric. The inner ring 710 can rotate within the outer ring 720 (perform a self-aligning motion). The outer ring 720 is located within the linkage ring 500 and is fixed relative to the linkage ring 500. The second end of the rocker arm 600 is fitted with the mounting through hole of the inner ring 710 with clearance. The second end of the rocker arm 600 can slide relative to the inner ring 710.

[0033] The process of adjusting the installation angle of blade 30° using the blade adjustment device is as follows: (Refer to...) Figure 1 and Figure 3 When the actuating mechanism 400 drives the linkage ring 500 to rotate circumferentially, the linkage ring 500 can drive the second end of the rocker arm 600 to move circumferentially. The second end of the rocker arm 600 slides relative to the inner ring 710. At the same time, the second end of the rocker arm 600 can drive the first end of the rocker arm 600 to swing around the journal 310 of the blade 300.

[0034] As can be seen from the structure and specific implementation process of the blade adjustment device described above, the actuating mechanism 400 drives the linkage ring 500 to rotate circumferentially. The linkage ring 500 can drive the rocker arm 600, which in turn drives the journal 310 of the blade 300 to rotate, thereby adjusting the installation angle of the blade 300. In the process of adjusting the installation angle of the blade 300, the linkage ring 500 only rotates circumferentially, which simplifies the movement of the linkage ring 500 and the rocker arm 600 to planar motion. This simplifies the motion transmission of the entire adjustment device and improves the design accuracy of the blade adjustment device. Furthermore, because the linkage ring 500 does not move along its axis, the planar distance from the axis of the journal 310 to the linkage ring 500 remains unchanged, and the size of the transmission arm in the adjustment process remains unchanged. Therefore, torque loss can be reduced, force transmission efficiency can be improved, and the stability and reliability of the adjustment can be guaranteed.

[0035] For example, Figure 4 A schematic diagram of the linkage ring and blades after adjustment, according to an exemplary embodiment of this application, is shown. (Reference) Figure 4 Assuming that before adjusting the installation angle of the blade 300, the blade 300 is in its initial state, the angle between the projection of the rocker arm axis Xl and the linkage ring axis Xc onto the plane perpendicular to the blade journal axis Xv is denoted as α0. Then, on the plane perpendicular to the blade journal axis Xv, the projection distance between the journal axis Xv and the center point Cj of the joint bearing is d / cosα0, where d is the projection distance between the center point Cj of the joint bearing and the journal axis Xv along the linkage ring axis Xc on the plane perpendicular to the journal axis Xv.

[0036] Figure 5 This diagram illustrates the position of the center point of the spherical bearing before and after adjusting the blade, according to an exemplary embodiment of this application. After adjusting the installation angle of the blade 300, the blade 300 is in its final working state, as shown... Figure 5 As shown, the angle between the projections of the rocker arm axis Xl and the linkage ring axis Xc onto the plane perpendicular to the blade journal axis Xv is α. Then, on the plane perpendicular to the blade journal axis Xv, the projection distance between the journal axis Xv and the center point Cj of the joint bearing is d / cosα.

[0037] It is evident that the distance from the axis Xv of the blade journal to the center point Cj of the spherical bearing changes before and after the blade adjustment device adjusts the blade installation angle. In this embodiment, during the process of adjusting the blade installation angle, when the actuator 400 drives the linkage ring 500 to rotate circumferentially, the rocker arm 600 can move with the linkage ring 500, and the second end of the rocker arm 600 can slide relative to the inner ring 710. That is, the distance between the end of the second end of the rocker arm and the center point Cj of the spherical bearing changes. This change can compensate for the distance from the axis Xv of the journal 310 of the blade 300 to the center point Cj of the spherical bearing.

[0038] Figure 6 A schematic diagram of the motion trajectory of a joint bearing according to an exemplary embodiment of this application is shown.

[0039] It should be noted that when the actuator 400 drives the linkage ring 500 to rotate circumferentially, the rocker arm 600 can move with the linkage ring 500, and the spherical bearing 700 oscillates around the linkage ring axis Xc. (Refer to...) Figure 6 The trajectory of the center point Cj of the spherical bearing is an arc trajectory Cl. The radius of rotation r of this arc trajectory Cl is the length of the projection Sl of the line connecting the center point Cj of the spherical bearing and the axis Xc of the linkage ring on a plane perpendicular to the axis Xc of the linkage ring. When the blade 300 is in the initial state, the angle between the projection Sl of the line connecting the center point Cj of the spherical bearing and the axis Xc of the linkage ring on a plane perpendicular to the axis Xc of the linkage ring and the axis Xv of the journal is denoted as β0; Figure 6 As shown, when the blade 300 is in its final working state, the angle between the projection Sl of the line connecting the center point Cj of the spherical bearing and the axis Xc of the linkage ring on the plane perpendicular to the axis Xc of the linkage ring, and the axis Xv of the journal, is denoted as β. Because the linkage ring 500 and the spherical bearing 700 are connected and their relative positions are fixed, the change in angle Δβ between the projection Sl of the line connecting the center point Cj of the spherical bearing and the axis Xc of the linkage ring on the plane perpendicular to the axis Xc of the linkage ring, and the axis Xv of the journal, before and after the blade adjustment device adjusts the blade 300, is also the angle through which the linkage ring 500 rotates circumferentially.

[0040] Because before and after the blade adjustment device adjusts the blade 300, the angle between the projection of the rocker arm axis Xl and the linkage ring axis Xc onto the plane perpendicular to the blade journal axis Xv changes by Δα = α - α0. This angle change Δα is also the angle by which the blade journal rotates before and after adjustment. Therefore, before and after the blade adjustment device adjusts the blade 300, the installation angle of the blade 300 changes by Δα = α - α0.

[0041] During the adjustment of blade 300 by the blade adjustment device, the change in the installation angle Δα of blade 300 can be calculated using the following formula:

[0042]

[0043] In the formula, r is the radius of the motion trajectory of the center point Cj of the spherical bearing; d is the projected distance between the center point Cj of the spherical bearing and the axis Xv of the journal along the direction of the linkage ring axis Xc on the plane perpendicular to the axis Xv of the journal; Δβ is the angle through which the linkage ring 500 rotates circumferentially before and after the blade 300 is adjusted; β0 is the angle between the projection Sl of the line connecting the center point Cj of the spherical bearing and the axis Xc of the linkage ring on the plane perpendicular to the axis Xc of the linkage ring and the axis Xv of the journal when the installation angle of the blade 300 is 0°; α0 is the angle between the projections of the axis Xl of the rocker arm and the axis Xc of the linkage ring on the plane perpendicular to the axis Xv of the blade journal when the installation angle of the blade is 0°.

[0044] Therefore, through the structure and specific implementation process of the blade adjustment device described above, it can be seen that when adjusting the installation angle of the blade 300, the blade adjustment device can control the rotation angle Δβ of the linkage ring 500 along the circumference, and accurately control the installation angle of the adjusted blade 300. Thus, the blade adjustment device provided in this embodiment can improve the design accuracy of the blade installation angle.

[0045] In one alternative approach, refer to Figure 1 The actuation mechanism 400 includes a drive motor 410 and a linear motion mechanism 420 flexibly connected to the drive motor 410. The linear motion mechanism 420 is connected to the linkage ring 500. It should be understood that the flexible transmission connection allows the drive motor 410 to drive the linear motion mechanism 420 to perform linear motion, and also allows the linear motion mechanism 420 to extend, fold, and generate a certain displacement perpendicular to the direction of linear motion. Therefore, the linear motion mechanism 420 can drive the linkage ring 500 to rotate circumferentially. Based on this, the drive motor 410 can drive the linear motion mechanism 420 to perform linear motion, and thus the linear motion mechanism 420 can drive the linkage ring 500 to rotate circumferentially.

[0046] Continue to refer to Figure 1 The aforementioned linear motion mechanism 420 includes a lead screw 421 and a first support 422 threadedly connected to the lead screw 421. The first support 422 is connected to the linkage ring 500, and the drive motor 410 is flexibly connected to the lead screw 421. Based on this, the drive motor 410 can drive the lead screw 421 to rotate, and the first support 422 can translate along the axis of the lead screw 421. At this time, because the drive motor 410 is flexibly connected to the lead screw 421, the first support 422 can drive the linkage ring 500 to rotate circumferentially.

[0047] Continue to refer to Figure 1The actuating mechanism 400 further includes a flexible coupling 430, a second support 440, and a rotating connector mounted on the second support 440. The drive motor 410 is connected to the lead screw 421 via the flexible coupling 430, and the lead screw 421 is connected to the second support 440 via the rotating connector. Therefore, the flexible coupling and the rotating connector together act as flexible compensation components for the lead screw 421 to drive the linkage ring 500 to rotate, ensuring smooth circumferential rotation of the linkage ring 500. Furthermore, the second support 440 also supports the lead screw 421 and increases its strength. In practical use, the rotating connector can be a bearing that can move radially and axially.

[0048] As an optional approach, such as Figure 3 As shown, the outer side of the casing 100 has a first raceway groove 110, and the bottom of the linkage ring 500 has a second raceway groove 511. The first raceway groove 110 and the second raceway groove 511 form a raceway cavity. The blade adjusting device also includes a raceway bearing 800, which is located within the raceway cavity. It should be understood that the inner ring of the raceway bearing 800 is fitted with the bottom of the first raceway groove 110, and the outer ring of the raceway bearing 800 is fitted with the bottom of the second raceway groove 511 of the linkage ring 500. Based on this, when the linkage ring 500 rotates circumferentially on the outer wall of the casing 100, the friction between the linkage ring 500 and the casing 100 can be reduced; furthermore, through the raceway bearing 800, the axial degree of freedom of the linkage ring 500 is constrained, and its axial position is fixed.

[0049] As an optional configuration, the linkage ring 500 includes a linkage ring body 510 and a linkage ring cover plate 520. The linkage ring cover plate 520 has a mounting hole 521. The outer ring 720 of the spherical bearing 700 is located inside the linkage ring body 510. The second end of the rocker arm 600 is slidably connected to the inner ring 710 of the spherical bearing 700 through the mounting hole 521. Based on this, the linkage ring cover plate 520 can limit the inner ring 710, ensuring that the inner ring 710 will not detach from the outer ring 720 when it is displaced by the outer ring 720.

[0050] In one alternative approach, Figure 7 A schematic diagram of the journal and adapter structure of an exemplary embodiment of this application is shown. Figure 7 As shown, the blade adjusting device also includes a transition structure 320 and a rotating assembly 321, with the first end of the rocker arm 600 rotatably connected to the transition structure 320. It should be understood that the first end of the rocker arm 600 can be rotatably connected to the transition structure 320 using a connecting pin.

[0051] For example, Figure 7A schematic diagram of the journal and adapter structure according to an exemplary embodiment of this application is shown. The adapter structure 320 is snapped into the journal 310. For example, the opposite ends of the adapter structure 320 and the journal 310 are snapped together using a stop fit, such as... Figure 7 As shown, the adapter structure 320 has a boss portion and the journal 310 has a groove portion. By assembling the groove portion and the boss portion, the connection between the adapter structure 320 and the journal 310 of the blade 300 can be realized.

[0052] The aforementioned rotating assembly 321 secures the transition structure 320 and the journal 310 together. In this case, the rotating assembly 321 can be a bolt, screw, or other fitting. For example,... Figure 3 As shown, when the rotating assembly 321 is a screw, the journal 310 can have a threaded blind hole, and the adapter structure 320 can have a mounting through hole. A reliable fixed connection between the adapter structure 320 and the journal 310 can be achieved by inserting a screw through the threaded blind hole and the mounting through hole.

[0053] like Figure 3 As shown, the blade adjusting device also includes a support bearing 900 and a bearing cover plate 910. The outer side of the casing 100 has a casing countersunk hole, and the support bearing 900 is disposed within the casing countersunk hole. It should be understood that the outer ring of the support bearing 900 is fitted and connected to the hole wall of the casing countersunk hole.

[0054] The inner ring of the aforementioned support bearing 900 is connected to both the journal 310 and the transition structure 320. It should be understood that at least a portion of the journal 310 and the transition structure 320 have the same outer diameter, and this portion of the journal 310 and the outer neck of the transition structure 320 are fitted and connected to the inner ring of the support bearing 900. When the first end of the rocker arm 600 drives the transition structure 320 to rotate, because the transition structure 320 is fixed to the journal 310, the journal 310 of the blade 300 can rotate with the first end of the rocker arm 600. During the synchronous rotation of the transition structure 320 and the journal 310 of the blade 300, the support bearing 900 can reduce the friction between the journal 310 of the transition structure 320 and the blade 300 and the wall of the countersunk hole in the casing.

[0055] The aforementioned bearing cover plate 910 presses the outer ring of the support bearing 900 into the countersunk hole of the casing. It should be understood that one end of the support bearing 900 abuts against the end face of the countersunk hole of the casing, and the other end of the support bearing 900 abuts against the bearing cover plate 910.

[0056] For example, such as Figure 3 As shown, the adapter structure 320 may have a flange, and the end face of the flange may abut against the end face of the support bearing 900, thereby achieving a reliable connection of the support bearing 900; in addition, it can also ensure that airflow is prevented from leaking from the connection between the blade 300 journal 310 and the casing 100 in the compressor.

[0057] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A blade adjusting device, characterized in that, The device is applied to a compressor, which includes a casing, a hub located inside the casing, and blades disposed between the casing and the hub. The blade adjustment device includes an actuating mechanism, a linkage ring, a rocker arm, and a spherical bearing. The actuating mechanism is used to drive the linkage ring to rotate circumferentially along the linkage ring. The first end of the rocker arm is connected to the journal of the blade, and the second end of the rocker arm is rotatably connected to the linkage ring through the spherical bearing. The second end of the rocker arm is slidably connected to the spherical bearing. The outer side of the casing has a first raceway groove, and the bottom of the linkage ring has a second raceway groove. The first raceway groove and the second raceway groove form a raceway cavity. The blade adjusting device also includes a raceway bearing, which is located in the raceway cavity. The blade adjusting device further includes a transition structure and a rotating assembly. The first end of the rocker arm is rotatably connected to the transition structure. The transition structure is engaged with the journal. The rotating assembly fixes the transition structure and the journal together. The blade adjusting device also includes a support bearing and a bearing cover plate. The outer side of the casing has a casing countersunk hole. The support bearing is disposed in the casing countersunk hole. The inner ring of the support bearing is connected to the journal and the transition structure respectively. The bearing cover plate presses the outer ring of the support bearing into the casing countersunk hole.

2. The blade adjusting device as described in claim 1, characterized in that, The actuation mechanism includes a drive motor and a linear motion mechanism flexibly connected to the drive motor, and the linear motion mechanism is connected to the linkage ring.

3. The blade adjusting device as described in claim 2, characterized in that, The linear motion mechanism includes a lead screw and a first support threaded onto the lead screw. The first support is connected to the linkage ring, and the drive motor is flexibly connected to the lead screw.

4. The blade adjusting device as described in claim 3, characterized in that, The actuating mechanism further includes: a flexible coupling, a second support, and a rotating connecting member disposed on the second support. The drive motor is connected to the lead screw through the flexible coupling, and the lead screw is connected to the second support through the rotating connecting member.

5. The blade adjusting device as described in claim 1, characterized in that, The linkage ring includes a linkage ring body and a linkage ring cover plate. The linkage ring cover plate is provided with mounting holes. The spherical bearing includes an inner ring and an outer ring. The inner ring mates with the outer ring. The outer ring is located inside the linkage ring body. The second end of the rocker arm is slidably connected to the inner ring through the mounting holes.

6. The blade adjusting device as described in claim 1, characterized in that, The relationship between the change in the installation angle of the blade and the change in the circumferential rotation angle of the linkage ring satisfies: in, The radius of the motion trajectory of the center point of the spherical bearing; The distance between the center point of the spherical plain bearing and the axis of the journal is the projected distance along the axis of the linkage ring on a plane perpendicular to the axis of the journal. This refers to the angle through which the linkage ring rotates circumferentially before and after blade adjustment; When the blade installation angle is 0°, the angle between the projection of the line connecting the center point of the spherical plain bearing and the axis of the linkage ring on a plane perpendicular to the axis of the linkage ring and the axis of the journal. This represents the change in the blade's installation angle before and after blade adjustment. The angle between the projections of the rocker arm axis and the linkage ring axis onto a plane perpendicular to the blade journal axis when the blade mounting angle is 0°.

7. A compressor, characterized in that, The device includes a casing, a hub, blades, and a blade adjusting device as described in any one of claims 1-6, wherein the hub is located inside the casing, the blades are disposed between the casing and the hub, and the blade adjusting device includes a rocker arm connected to the journal of the blade.

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