The compressor and its multi-stage adjustable stator vane adjustment device

Abstract

One object of the present invention is to provide an adjustment device for multi-stage adjustable stator vanes, which can solve at least one of the problems existing in the prior art. Another object of the present invention is to provide a compressor. The multi-stage adjustable stator vane adjustment device for achieving the aforementioned objects includes a drive unit, a transmission bar, a transmission gear system, and a linkage ring. The drive unit has a first toothed portion, and the transmission bar is arranged in pairs on both sides of the first toothed portion, respectively movably supported on the outer periphery of the housing. The transmission gear system is arranged corresponding to each stage of adjustable stator vane, including an input gear and an output gear. The linkage ring is arranged corresponding to each stage of adjustable stator vane and has a second toothed portion, which meshes with the transmission end gear and the output gear of the transmission gear system, respectively. The output gear of the gear system outputs different rotation angles corresponding to different stages of adjustable stator vanes.

Description

Technical Field

[0001] This invention relates to the field of aero-engines, and more particularly to a compressor and its multi-stage adjustable stator vane adjustment device. Background Technology

[0002] In existing technologies, adjustable blades can be used to improve the stable operating range of compressors and are widely used in aero engines and gas turbines. Currently, in order to enable adjustable blades to work in a coordinated and synchronous manner in compressors, a control mechanism needs to be designed.

[0003] In existing technology, the adjustment between each level of adjustable blades involves a drive unit driving a drive shaft with helical gears to rotate. The helical gears, along with a gear on one side, transmit torque to the drive end of each level of blade journal, thus driving the adjustable blades to rotate synchronously. Simultaneously, helical gears of different sizes are installed on the drive shaft to allow different rotation angles between each level of blade.

[0004] In addition, in the prior art, a linkage ring is used on one side to transmit torque to the blades of the same stage that are arranged around the circumference of the casing, so as to realize the linkage rotation between the blades of the same stage.

[0005] However, the inventors discovered that: 1) In existing transmission adjustments between adjustable blades at different levels, the transmission components between blades at each level are subjected to force on one side, which easily causes friction on one side of the parts, increasing resistance or causing severe wear on one side of the parts, thus reducing the overall service life of the engine. 2) For transmission adjustments between adjustable blades of the same level, the gears at the drive end of the journal of each blade in the same level are also subjected to force on one side, which easily causes the blade journal to be biased to one side, which can also easily cause blade misalignment, thus reducing the overall service life of the engine. Summary of the Invention

[0006] One object of the present invention is to provide an adjustment device for multi-stage adjustable stator vanes, which can solve at least one of the problems existing in the prior art.

[0007] Another object of the present invention is to provide a compressor comprising an adjustment device for multi-stage adjustable stator vanes as described above.

[0008] A multi-stage adjustable stator vane adjustment device for achieving the aforementioned objective, used to adjust multi-stage adjustable stator vanes in a compressor, each stage of the adjustable stator vane comprising a set of adjustable stator vanes distributed along the circumferential direction of the housing, each of the adjustable stator vanes including a drive end exposed on the outer circumferential side of the housing, the adjustment device comprising:

[0009] The drive unit has a first toothed portion;

[0010] The transmission bars are arranged in pairs on both sides of the first tooth, respectively movably supported on the outer periphery of the housing, and respectively meshing with the first tooth;

[0011] The transmission gear system consists of multiple adjustable stationary vanes arranged on the outer periphery of the housing for each stage, including an input gear and an output gear. The output gear rotates with the rotation of the input gear, and the input gear of the transmission gear system is meshed between the two transmission bars.

[0012] The linkage ring consists of multiple adjustable stationary blades corresponding to each stage, which are movably arranged around the outer periphery of the housing along the circumferential direction of the housing. It has a second tooth portion, which meshes with the transmission end and the output end gear of the transmission gear system respectively.

[0013] Among them, the output gears of the gear system output different rotation angles corresponding to different levels of the adjustable stator vanes.

[0014] In one or more embodiments, the transmission bar is a transmission rack, the transmission gear system includes a first gear, a second gear, a third gear and a fourth gear, the first gear and the second gear are coaxially fixedly connected, the third gear and the fourth gear are coaxially fixedly connected, the first gear is the input end gear, the second gear meshes with the third gear for transmission, and the fourth gear is the output end gear;

[0015] Among them, the adjustable stationary blades of different levels have different pitch circle diameters for the second gear and / or the third gear.

[0016] In one or more embodiments, the housing has a first end face, a second end face, and a height direction from the first end face toward the second end face, and the adjustment device further includes:

[0017] Guide grooves, corresponding to the positions of each of the transmission racks, are formed on the outer periphery of the housing and extend along the height direction; and

[0018] A guide member supports and connects the housing and the transmission rack, with one end of the guide member movable within the guide groove.

[0019] In one or more embodiments, in each of the transmission gear trains, the first gear and the second gear are supported on the outer periphery of the housing by a first support frame, and the third gear and the fourth gear are supported on the outer periphery of the housing by a second support frame.

[0020] In one or more embodiments, each of the linkage rings is supported on the outer periphery of the housing by a third support frame, and the outer periphery of the housing is also provided with an annular groove, one end of the third support frame being movable within the annular groove.

[0021] In one or more embodiments, for each stage of the adjustable stator vane, the linkage ring includes a pair of gear rings disposed on opposite sides of the transmission end.

[0022] In one or more embodiments, the second gear has different pitch circle diameters corresponding to different levels of the adjustable stator vanes.

[0023] In one or more embodiments, in the adjustment device corresponding to each stage of adjustable stator vane, the rotation angle of the adjustable stator vane corresponding to that stage is changed by increasing or decreasing the pitch circle diameter of the second gear and / or the third gear.

[0024] In one or more embodiments, in the adjusting device corresponding to each stage of adjustable stator blade, the pitch circle diameter of the second gear is d2, and the pitch circle diameter of the third gear is d3.

[0025] When the input rotation angle of the drive unit is A, the desired rotation angle size corresponding to the adjustable stator of that stage is configured by the following relationship:

[0026] The desired angle of rotation for the adjustable stationary blade of this level is -A·d2 / d3.

[0027] In one or more embodiments, the first gear and / or the second gear and / or the third gear and / or the fourth gear are detachably connected to the adjusting device.

[0028] A compressor for achieving the aforementioned other objective includes a multi-stage adjustable stator vane adjustment device, the adjustment device being the multi-stage adjustable stator vane adjustment device as described above, and the housing being a compressor casing.

[0029] The advantages of this invention include one or a combination of the following:

[0030] This adjustment device achieves the same input (drive unit) actuation by setting a pair of transmission bars at the input end gear of the transmission gear system. While driving the input end gear at the multi-stage blades, the transmission components are located on both sides of the input end gear, so the rotating parts are subjected to symmetrical forces. This avoids uneven wear of the parts in the gear system due to unilateral force, improves the service life of the parts, and thus improves the service life of the engine. Attached Figure Description

[0031] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0032] Figure 1 A perspective view of one embodiment of this multi-stage adjustable stationary vane adjustment device is shown;

[0033] Figure 2 This is a side view along the axial direction of one embodiment of the multi-stage adjustable stator vane adjustment device.

[0034] Figure 3 A cross-sectional schematic diagram of the transmission structure is shown below for one embodiment of this multi-stage adjustable stationary vane adjustment device;

[0035] Figure 4 A cross-sectional schematic diagram of the support structure is shown below for one embodiment of this multi-stage adjustable stator vane adjustment device;

[0036] Figures 5 and 6 Schematic diagrams of the operation of one embodiment of the multi-stage adjustable stator vane adjustment device are shown. Detailed Implementation

[0037] The following discloses various implementations or embodiments of the described subject matter. To simplify the disclosure, specific examples of the elements and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of protection of this application. Furthermore, reference numerals and / or letters may be repeated in different examples within these disclosures. This repetition is for brevity and clarity and does not in itself indicate a relationship between the various implementations and / or structures to be discussed.

[0038] Meanwhile, this application uses specific terms to describe embodiments of the application, such as "an embodiment," "one embodiment," and / or "some embodiments," which refer to a certain feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this specification does not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined. Additionally, the use of terms such as "first," "second," etc., to define components is merely for the purpose of distinguishing the corresponding components; unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0039] It is important to note that, in the context of usage, the terms up, down, left, right, top, bottom, clockwise, and counterclockwise in the following descriptions are used for convenience only and do not imply any specific fixed direction. In fact, they are used to reflect the relative positions and / or orientations between different parts of an object.

[0040] It should be noted that these and subsequent accompanying drawings are merely illustrative and are not drawn to scale, nor should they be construed as limiting the scope of protection of the present invention. Furthermore, variations in different embodiments can be appropriately combined.

[0041] To address at least one of the problems existing in the prior art, one aspect of the present invention provides an adjustment device for a multi-stage adjustable stator vane.

[0042] like Figure 1 This diagram shows a perspective view of one embodiment of the multi-stage adjustable stator vane adjustment device, in which the compressor is equipped with multi-stage adjustable stator vanes, such as... Figure 1 In the embodiment shown, the compressor has a housing 2, which has a first end face 21, a second end face 22, and a height direction a from the first end face 21 toward the second end face 22. One to four stages of adjustable stator vanes are provided on the housing 2, namely adjustable stator vanes 1a, 1b, 1c, and 1d. The adjustable stator vanes 1a to 1d are spaced apart from each other along the height direction a, and each group of adjustable stator vanes includes a group of adjustable stator vanes distributed along the circumference of the housing 2. For example, for the first group of adjustable stator vanes 1a, each adjustable stator vane 1a within this stage is spaced apart along the circumference of the housing 2. For the remaining stages of adjustable stator vanes 1b to 1c, each stage of adjustable stator vanes is distributed in the same manner. The different stages may have the same or different total number of vanes, which will not be elaborated further here. Each adjustable stator vane includes a drive end 10 exposed on the outer circumference of the housing 2.

[0043] Figure 2 This is a side view along the axial direction of one embodiment of the multi-stage adjustable stator vane adjustment device. Figure 3 This is a cross-sectional schematic diagram showing the transmission structure in one embodiment of the multi-stage adjustable stator vane adjustment device. Figure 4 The following is a cross-sectional schematic diagram of the support structure according to one embodiment of the multi-stage adjustable stator blade adjustment device.

[0044] The adjusting device, as shown in the figure, includes a drive unit 3, transmission bars 4, a transmission gear system 5, and a linkage ring 6. The drive unit 3 has a first toothed portion 30. Transmission bars 4 are arranged in pairs on both sides of the first toothed portion 30 and are movably supported on the outer periphery of the housing 2. The connection between the transmission bars 4 and the housing 2 will be described in detail later and will not be repeated here. The two transmission bars 4 mesh with the first toothed portion 30 on both sides, so that when the first toothed portion 30 is actuated, the two transmission bars 4 can be driven to move in different directions, such as... Figure 5 as well as Figure 6 As shown, in Figure 5 In the middle, the drive unit 3 rotates counterclockwise. At this time, the transmission bar 4 located on the upper side of the drive unit 3 moves towards the left side of the diagram, and the transmission bar located on the lower side of the drive unit 3 moves towards the right side of the diagram, so as to simultaneously contact and drive the transmission gear system 5 to move. Similarly, in Figure 6 In the middle, the drive unit 3 rotates clockwise. At this time, the transmission bar 4 located on the upper side of the drive unit 3 moves towards the right side of the figure, and the transmission bar located on the lower side of the drive unit 3 moves towards the left side of the figure, so as to simultaneously contact and drive the transmission gear system 5 to move.

[0045] It is understood that the transmission bar 4 in this document refers to a part with long, toothed sections, such as the transmission rack shown in the figure. It can also be a part that is different from the one shown in the figure, with teeth that extend in a straight line, such as a belt or chain with teeth or a groove structure that can cooperate with gears. The transmission bars in the embodiments described below are all transmission racks, so the transmission rack 4 follows the reference numerals in the figure.

[0046] The transmission gear system 5 consists of multiple gears disposed on the outer periphery of the housing 2 corresponding to each stage of adjustable stationary vane. Specifically, in the embodiment shown in the figure, transmission gear systems 5 are respectively disposed corresponding to adjustable stationary vanes 1a, 1b, 1c, and 1d, totaling four transmission gear systems 5. Each transmission gear system 5 has an input gear 51 and an output gear 54. The input gear 51 is sandwiched between the two transmission racks 4 in a transmission connection manner that meshes with each of the two transmission racks 4. The output gear 54 rotates along with the input gear 51. That is, when the two transmission racks 4 are driven by the first tooth 30, the input gear 51 is driven to rotate, and the output gear 54 also rotates along with the input gear 51.

[0047] It is understood that in other embodiments different from those shown in the figure, the number of adjustable blade stages can be changed in other suitable ways, such as 1 stage, 2 stages, 3 stages or more stages. In this case, the number of corresponding transmission gear systems 5 is also one, two, three or more, but the transmission mode of the transmission gear system 5 corresponding to each stage of adjustable blade in this adjustment system is the same as the aforementioned mode.

[0048] Multiple linkage rings 6 are provided for each stage of adjustable stator vane. Specifically, in the embodiment shown in the figure, a linkage ring 6 is provided for each of the adjustable stator vanes 1a, 1b, 1c, and 1d. Each linkage ring 6 is movably arranged around the outer periphery of the housing 2 along its circumference. Its relative connection with the housing 2 will be detailed later and will not be elaborated here. The linkage ring 6 has a second tooth 60, which meshes with the transmission end 10 of the adjustable stator vane and the output gear 54 of the transmission gear system 5. Specifically, the output gear 54 is a gear structure that meshes with the second tooth 60 for transmission. The transmission end 10 can be configured as a tooth structure including a gear or as a gear structure to achieve meshing between the transmission end 10 and the second tooth 60. It is understood that the meshing transmission methods between the transmission end 10 and the second tooth 60 include, but are not limited to, the methods described above. When the output gear 54 rotates, the linkage ring 6 meshing with it will move along the circumference of the housing 2, thereby driving the transmission end 10 of the adjustable blade to follow, so that each stage of the blade is driven by the linkage ring 6 to rotate synchronously.

[0049] It is understood that, as mentioned above, in some other embodiments different from those shown in the figure, the number of adjustable blade stages can be changed in other suitable ways, such as 1 stage, 2 stages, 3 stages or more stages. In this case, the number of corresponding linkage rings 6 is also one, two, three or more, but the transmission method of the linkage rings 6 corresponding to each stage of adjustable blade in this adjustment system is the same as the aforementioned method.

[0050] In this transmission gear system 5, the output gear 54 outputs different rotation angles for different levels of adjustable stator vanes. The specific method by which the output gear 54 outputs different rotation angles will be detailed later and will not be elaborated here. By outputting different rotation angles, the multi-level adjustable stator vanes can have different rotation angles, achieving different outputs from the same input and realizing the purpose of multi-level speed change.

[0051] This adjustment device achieves the same input (drive unit 3) actuation by setting a pair of transmission racks 4 at the input end gear 51 of the transmission gear system 5 for transmission. While driving the input end gear 51 at the multi-stage blades, the transmission components are located on both sides of the input end gear 51, so that the rotating components are subjected to symmetrical forces. This avoids uneven wear of the parts in the gear system 4 due to unilateral force, improves the service life of the parts, and thus improves the service life of the engine.

[0052] While one embodiment of the compressor and its multi-stage adjustable stator vane adjustment device is described above, other embodiments of the compressor and its multi-stage adjustable stator vane adjustment device may have more details in many respects than the above embodiment, and at least some of these details may have various variations. At least some of these details and variations will be described below with reference to some embodiments.

[0053] In one embodiment of this regulating device, the transmission gear system 5 includes a first gear, a second gear 52, a third gear 53, and a fourth gear. The first gear is the input gear 51 of the gear system 4, and is therefore referred to as the first gear 51 in the following text. The fourth gear is the output gear 54 of the gear system 4, and is therefore referred to as the fourth gear 54 in the following text. The first gear 51 and the second gear 52 are coaxially fixed to each other, and the third gear 53 and the fourth gear 54 are coaxially fixed to each other. The second gear 52 and the third gear 53 mesh and drive each other. Thus, when the first gear 51, i.e., the input gear of the transmission gear system 5, rotates, the second gear 52 rotates synchronously, driving the third gear 53 to rotate. The third gear 53 and the fourth gear 54, i.e., the output gears of the transmission gear system 5, rotate synchronously, so that the output gear rotates with the input gear. Among them, the second gear 52 and / or the third gear 53 have different pitch circle diameters corresponding to different levels of adjustable stationary vanes. Due to the different pitch circle diameters, the adjustable stationary vanes corresponding to different levels can output different rotation angles through the transmission gear system 5, thereby realizing that the multi-level adjustable stationary vanes have different rotation angles, achieving different outputs from the same input and realizing the purpose of multi-level speed change.

[0054] It is understood that in the embodiments described above, the first gear 51 and the second gear 52 are coaxially fixed to each other to form a double gear, and the third gear 53 and the fourth gear 54 are coaxially fixed to each other to form another double gear. That is, in the embodiments described above, the transmission gear system 5 is driven by the meshing of two double gears. In other embodiments different from those shown in the figures, the structural form of the transmission gear system 5 may have other suitable modifications or variations, but is not limited thereto. For example, in one embodiment, the transmission gear system 5 may be driven by the meshing of three or more double gears to achieve the output gear rotating with the input gear.

[0055] In one embodiment of this adjusting device, the adjusting device further includes a guide groove (not shown in the figure) formed on the outer periphery of the housing 2. The guide groove is correspondingly disposed at the position of the transmission rack 4, such as directly below the transmission rack 4, and extends along the height direction a of the housing 2. The adjusting device also includes a guide member 23, which supports and connects the housing 2 and the transmission rack 4. In the embodiment shown in the figure, the guide member 23 is supported at both ends of each transmission rack 4. One end of the guide member 23 is movable in the guide groove. For example, the end of the guide member 23 connected to the guide groove is configured as a slider. When the transmission rack 4 is driven by the driving unit 3 to move along the height direction a, the slider structure moves in the guide groove, thereby realizing the movable support of the transmission rack 4 on the outer periphery of the housing 2.

[0056] In one specific implementation, the guide groove as described above is a tenon groove or a dovetail groove.

[0057] In some other embodiments, the way the transmission rack 4 is supported on the housing 2 may have other suitable variations or changes, but is not limited thereto. For example, in one embodiment, a groove is provided in the transmission rack, and a support block protrudes from the housing. The end of the support block that contacts the transmission rack is configured as a slider that can move in the groove.

[0058] like Figure 3 As shown, in one embodiment of this adjusting device, in each transmission gear train 5, the first gear 51 and the second gear 52 are supported on the outer periphery of the housing 2 by a first support frame 24, as shown. Specifically, the first gear 51 and the second gear 52 are connected by a transition shaft 55, and the first support frame 24 supports the transition shaft 55 on the outer periphery of the housing 2. The third gear 53 and the fourth gear 54 are supported on the outer periphery of the housing 2 by a second support frame 25, specifically, the third gear 53 and the fourth gear 54 are also connected by a transition shaft 55, and the second support frame 25 supports the transition shaft 55 on the outer periphery of the housing 2. In the embodiment shown, the first support frame 24 and / or the second support frame 25 are rod structures as shown. Of course, the first support frame 24 and / or the second support frame 25 may also have different structural forms than those shown, such as a seat structure.

[0059] like Figure 4As shown, in one embodiment of this adjustment device, each linkage ring 6 is supported on the outer periphery of the housing 2 by a third support frame 26. The outer periphery of the housing 2 is also provided with an annular groove (not shown in the figure). The position of the annular groove corresponds to the third support frame 26. For example, it is provided directly below the third support frame 26. The end of the third support frame 26 that is connected to the annular groove can be configured as a slider structure, so that one end of the third support frame 26 can move in the annular groove. Thus, when the linkage ring 6 moves along the circumference of the housing 2, the third support frame 26 can move synchronously and support the linkage ring 6.

[0060] In some other embodiments, the support method of the linkage ring 6 on the housing 2 can have other suitable variations or changes, but is not limited thereto. For example, in one embodiment, a groove is formed in the linkage ring, and a support block protrudes from the housing. The end of the support block that contacts the linkage ring is configured as a slider that can move in the groove. In another embodiment, the annular groove can be formed at the blade root, and the linkage ring 6 is movably supported by the support frame in the annular groove formed at the blade root.

[0061] In some other embodiments, for each adjustable stationary blade, the linkage ring 6 includes a pair of gear rings disposed on opposite sides of the transmission end 10. Since the linkage rings are disposed on opposite sides of the transmission end 10, the force output by the linkage rings to the transmission end 10 is symmetrical during transmission, which solves the problem of asymmetrical blade drive and makes the blades rotate symmetrically on both sides, thereby avoiding uneven wear and improving the service life of the parts.

[0062] In one embodiment of this adjustment device, the angle of rotation of the corresponding adjustable stator is changed by increasing or decreasing the pitch circle diameter of the second gear 52 and / or the third gear 53.

[0063] Furthermore, let the input rotation angle of the drive unit 3 be A, the pitch circle diameter of the second gear 52 corresponding to the first-stage adjustable vane be d2, and the pitch circle diameter of the third gear 53 be d3. Then, the output rotation angle of the corresponding stage adjustable vane is -A·d2 / d3. That is, in the corresponding first-stage adjustable vane, increasing the pitch circle diameter d2 of the second gear 52 or decreasing the pitch circle diameter d3 of the third gear 53 can increase the output rotation angle of the corresponding stage adjustable vane. With this setting, when configuring the pitch circle diameters of the second gear 52 and / or the third gear 53, the above relationship is satisfied: the desired output rotation angle of the corresponding stage adjustable vane is -A·d2 / d3, thus quickly completing the desired rotation angle adjustment of the adjustable vane.

[0064] Specifically, when the module of the drive unit 3 is m, the number of teeth is z, the pitch circle diameter is d = mz, and the input rotation angle is A, the module of the transmission rack is also m. Correspondingly, the module of each input gear 51 is also m, the number of teeth is z, the pitch circle diameter is d = mz, and the rotation angle is also A. Let the module of the second gear 52 be m2, the number of teeth be z2, the pitch circle diameter be d2 = m2z2, and the rotation angle A2 = A; let the module of the third gear 53 be m2, the number of teeth be z3, the pitch circle diameter be d3 = m2z3, and the rotation angle A3 = -A·d2 / d3. Then the module of the output gear 54 is m4, the number of teeth is z4, the pitch circle diameter is d4 = m4z4, and the rotation angle A4 = A3 = -A·d2 / d3.

[0065] In one embodiment of this adjustment device, the first gear 51 and / or the second gear 52 and / or the third gear 53 and / or the fourth gear 52 are detachably connected to the adjustment device, thereby allowing each gear train to be designed or replaced independently without affecting the combination of other gear trains, improving design efficiency and adaptability, and saving costs.

[0066] The adjustment device for the multi-stage adjustable stator vanes in one or more of the embodiments described above can be applied to a compressor, and the housing described above is a compressor casing.

[0067] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-stage adjustable stator vane adjustment device for adjusting multi-stage adjustable stator vanes in a compressor, each stage of the adjustable stator vane comprising a set of adjustable stator vanes distributed along the circumferential direction of the housing, each of the adjustable stator vanes including a drive end exposed on the outer circumferential side of the housing, characterized in that, The regulating device includes: The drive unit has a first toothed portion; The transmission bars are arranged in pairs on both sides of the first tooth, respectively movably supported on the outer periphery of the housing, and respectively meshing with the first tooth; The transmission gear system consists of multiple adjustable stationary vanes arranged on the outer periphery of the housing for each stage, including an input gear and an output gear. The output gear rotates with the rotation of the input gear, and the input gear of the transmission gear system is meshed between the two transmission bars. The linkage ring consists of multiple adjustable stationary blades corresponding to each stage, which are movably arranged around the outer periphery of the housing along the circumferential direction of the housing. It has a second tooth portion, which meshes with the transmission end and the output end gear of the transmission gear system respectively. Among them, the output gear of the gear system outputs different rotation angles corresponding to different levels of adjustable stationary blades; the transmission bar is a transmission rack; the transmission gear system includes a first gear, a second gear, a third gear, and a fourth gear; the first gear and the second gear are coaxially fixedly connected; the third gear and the fourth gear are coaxially fixedly connected; the first gear is the input gear; the second gear meshes with the third gear for transmission; and the fourth gear is the output gear. Among them, the adjustable stationary blades of different levels have different pitch circle diameters for the second gear and / or the third gear.

2. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, The housing has a first end face, a second end face, and a height direction from the first end face toward the second end face; the adjustment device further includes: Guide grooves, corresponding to the positions of each of the transmission racks, are formed on the outer periphery of the housing and extend along the height direction; and A guide member supports and connects the housing and the transmission rack, with one end of the guide member movable within the guide groove.

3. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, In each of the aforementioned transmission gear systems, the first gear and the second gear are supported on the outer periphery of the housing by a first support frame, and the third gear and the fourth gear are supported on the outer periphery of the housing by a second support frame.

4. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, Each of the linkage rings is supported on the outer periphery of the housing by a third support frame. The outer periphery of the housing is also provided with an annular groove, and one end of the third support frame is movable in the annular groove.

5. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, To correspond to each stage of the adjustable stationary vane, the linkage ring includes a pair of gear rings disposed on opposite sides of the transmission end.

6. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, The second gear has different pitch circle diameters corresponding to different levels of the adjustable stator vanes.

7. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, In the adjustment device corresponding to each stage of adjustable stator vane, the rotation angle of the adjustable stator vane corresponding to that stage is changed by increasing or decreasing the pitch circle diameter of the second gear and / or the third gear.

8. The adjusting device for multi-stage adjustable stator vanes as described in claim 7, characterized in that, In the adjustment device corresponding to each stage of adjustable stationary blade, the pitch circle diameter of the second gear is d2, and the pitch circle diameter of the third gear is d3. When the input rotation angle of the drive unit is A, the desired rotation angle size corresponding to the adjustable stator of that stage is configured by the following relationship: The desired angle of rotation for the adjustable stationary blade of this level is -A·d2 / d3.

9. The adjusting device for multi-stage adjustable stator vanes as described in claim 1, characterized in that, The first gear and / or the second gear and / or the third gear and / or the fourth gear are detachably connected to the adjusting device.

10. A compressor, comprising a multi-stage adjustable stator vane adjustment device, characterized in that, The adjusting device is an adjusting device for multi-stage adjustable stator vanes as described in any one of claims 1 to 9, and the housing is a compressor casing.

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