Dynamic annular cascade and compressor annular cascade dynamic test device

Abstract

The application belongs to the technical field of experimental testing of impeller machines, and provides a dynamic annular cascade and a dynamic experimental device for an annular cascade of a compressor. The dynamic annular cascade comprises: an inlet guide vane section inner casing, an inlet guide vane section inner pipeline arranged in the inlet guide vane section inner casing, and a first assembly area formed between the inlet guide vane section inner pipeline and the inlet guide vane section inner casing; a plurality of inlet guide vanes, which are arranged in the first assembly area in a ring shape in sequence with the center line of the inlet guide vane section inner pipeline as an axis; and a plurality of first adjusting mechanisms, which are arranged on the inlet guide vane section inner casing in a ring shape in sequence, and the execution end of the first adjusting mechanism penetrates through the shell of the inlet guide vane section inner casing and is connected with the inlet guide vane at the corresponding position, so that each inlet guide vane is independently rotated to adjust the installation angle. The dynamic annular cascade provided by the application realizes the control of the circumferential non-uniformity of the incoming flow condition by configuring a driving motor for each inlet guide vane and outlet guide vane and adjusting the angle of the guide vanes dynamically and as a whole or partially.

Description

Technical Field

[0001] This invention relates to the field of turbomachinery experimental testing technology, and provides a dynamic annular blade cascade and a dynamic experimental device for compressor annular blade cascades. Background Technology

[0002] To meet the high thrust-to-weight ratio requirements of aero-engines, compressor blades are increasingly adopting lightweight, high-load integral bladed disk designs. As the single-stage load on the blades continues to increase, the aeroelasticity problem becomes increasingly significant. The excitation sources for the aeroelasticity problem are complex, and existing experimental data that can be used to verify aeroelastic models and develop aeroelastic design tools are extremely scarce.

[0003] Compared to other experimental setups, the annular blade cascade of a compressor offers advantages such as low testing cost, simple and reliable measurement setup, and the ability to simulate circumferentially transmitted traveling waves due to its non-closed circumferential nature. It is currently the most important experimental setup in the field of fundamental aeroelasticity research. Patent CN114689329A discloses an annular blade cascade test bench that utilizes the infinite circumferential nature of the annular blade cascade to solve the wall effect problem in planar blade cascades where vibration and aerodynamic excitation are suppressed or reflected along the circumferential direction. It also solves the problem of multi-blade cascade parameter experiments by replacing the test section.

[0004] With the continuous improvement of engine performance, the aeroelasticity problem of compressor blades in the transition state is becoming increasingly prominent. In terms of basic testing, there is a lack of basic experimental devices that can simulate the aeroelastic phenomenon of blades in the transition state. Patent CN114992167A discloses a guide vane installation angle adjustment device for the outer channel of an annular blade cascade. Through the blade tip connecting shaft, flange seat, transmission rod, spherical bearing, linkage rod, roller frame and drive collar, the installation angle of the same row of guide vanes in the outer channel of the annular blade cascade can be adjusted synchronously and smoothly.

[0005] The above design adjusts the guide vane installation angle through an overall linkage method, which can only be adjusted synchronously in the circumferential direction and cannot control the inflow conditions at certain circumferential positions according to test requirements. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the fact that the adjustment of the guide vane installation angle of the existing annular blade test device adopts an overall linkage method, which cannot control the inflow conditions at certain circumferential positions according to the test requirements. The existing adjustment device is usually fixed on the surface of the casing, which inevitably introduces new vibration sources while achieving control, and introduces interference to the aeroelasticity test of the compressor blade. Thus, a dynamic annular blade and a dynamic test device for compressor annular blade are provided.

[0007] To address the above problems, the present invention provides a dynamic annular blade cascade, comprising: an inlet guide vane section casing, wherein an inner pipe for the inlet guide vane section is provided inside the inlet guide vane section casing, and a first assembly area is formed between the inner pipe for the inlet guide vane section and the inlet guide vane section casing.

[0008] Multiple inlet guide vanes are arranged circumferentially within the first assembly area, with the centerline of the inner pipe of the inlet guide vane section as the axis.

[0009] Multiple first adjustment mechanisms are arranged one-to-one with multiple inlet guide vanes. The multiple first adjustment mechanisms are arranged in a circumferential manner on the inlet guide vane section casing. The execution end of each first adjustment mechanism passes through the outer shell of the inlet guide vane section casing and is connected to the corresponding inlet guide vane, so that each inlet guide vane can be independently rotated to adjust the installation angle.

[0010] In one embodiment, it also includes:

[0011] An outlet guide vane section casing, wherein an inner pipe for the outlet guide vane section is provided inside the outlet guide vane section casing, and a second assembly area is formed between the inner pipe for the outlet guide vane section and the outlet guide vane section casing;

[0012] Multiple outlet guide vanes are arranged circumferentially within the second assembly area, with the centerline of the inner pipe of the outlet guide vane section as the axis.

[0013] Multiple second adjustment mechanisms are arranged one-to-one with the multiple outlet guide vanes. The multiple second adjustment mechanisms are arranged in a circumferential manner on the outlet guide vane section casing. The execution end of each second adjustment mechanism passes through the outer shell of the outlet guide vane section casing and is connected to the corresponding outlet guide vane, so that each outlet guide vane can be independently rotated to adjust the installation angle.

[0014] In one embodiment, the first adjusting mechanism includes:

[0015] An imported DC motor, wherein the imported DC motor has a rotating output terminal;

[0016] The first angle adjustment shaft has one end connected to the inlet guide vane, and the other end connected to the rotation output end of the inlet DC motor via an inlet coupling.

[0017] In one embodiment, the second adjusting mechanism includes:

[0018] An output DC motor, wherein the output DC motor has a rotating output terminal;

[0019] The second angle adjustment shaft has one end connected to the outlet guide vane, and the other end connected to the rotation output end of the outlet DC motor via an outlet coupling.

[0020] In one embodiment, the inlet guide vane section casing is connected and fixed to the outlet guide vane section casing through the support section casing to form a flow guiding channel. The first angle adjustment shaft is driven to rotate by the inlet DC motor to adjust the installation angle of the corresponding connected inlet guide vane and / or the second angle adjustment shaft is driven by the outlet DC motor to adjust the installation angle of the corresponding connected outlet guide vane.

[0021] In one embodiment, a first mounting base is fitted onto the outer wall of the inlet DC motor, and the first mounting base is fixed relative to the outer wall of the inlet guide vane section casing; a second mounting base is fitted onto the outer wall of the outlet DC motor, and the second mounting base is fixed relative to the outer wall of the outlet guide vane section casing.

[0022] In one embodiment, a shock-absorbing mechanism is further included, the shock-absorbing mechanism comprising:

[0023] Multiple first fixing rods, with each end of the first fixing rod connected to an adjacent first mounting base, forming a first ring structure in which the first fixing rods and the first mounting bases are connected at intervals;

[0024] A pair of imported connecting rods, with any one of the imported connecting rods mounted on the first fixed rod, and the line connecting the pair of imported connecting rods being parallel to the horizontal plane;

[0025] A pair of imported support seats are connected to a pair of imported connecting rods respectively;

[0026] Multiple second fixing rods, with each end of the second fixing rod connected to an adjacent second mounting base, forming a second ring structure in which the second fixing rods and the second mounting bases are connected at intervals;

[0027] A pair of outlet connecting rods, with one outlet connecting rod mounted on the second fixed rod, and the line connecting the pair of outlet connecting rods parallel to the horizontal plane;

[0028] A pair of outlet support seats are connected to a pair of outlet connecting rods respectively.

[0029] The present invention also provides a dynamic experimental apparatus for a compressor annular blade cascade, comprising the dynamic annular blade cascade as described above.

[0030] The present invention has the following advantages:

[0031] 1. By equipping each inlet guide vane and outlet guide vane with a drive motor, the installation angle of the inlet guide vane and outlet guide vane can be controlled in real time by the motor, so as to realize the dynamic adjustment of the incoming flow conditions (such as angle of attack, flow rate, etc.);

[0032] 2. By adjusting the local motor parameters to control the installation angle of the local inlet guide vanes and outlet guide vanes, the circumferential non-uniformity of the incoming flow conditions can be controlled, and the test capability can be used to simulate the circumferential non-uniformity of airflow caused by processing, installation, inlet distortion, exhaust distortion, etc.

[0033] 3. By connecting the motor mounting base and the mounting base fixing rod, and fixing it to the ground through the connecting rod and support base, the transmission path of the vibration generated by the motor movement to the guide casing is cut off, thereby reducing the vibration of the annular blade cascade body. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the external structure of the dynamic annular cascade in this invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of the dynamic annular cascade in this invention;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1—Inlet section casing; 11—Inlet guide cone;

[0039] 2—Inlet guide vane section casing; 21—Inlet section inner pipe;

[0040] 31—Imported DC motor; 32—First mounting base; 33—Imported coupling; 34—First fixing rod; 35—Imported connecting rod; 36—Imported support base; 37—First angle adjustment shaft; 38—Imported guide vane;

[0041] 4—Test section casing; 41—Inner pipe of the test section; 42—Test blade;

[0042] 5—Support section casing; 51—Inner pipe of support section; 52—Support blade;

[0043] 6—Outlet guide vane section casing; 61—Inner pipe of the outlet guide vane section;

[0044] 71—Outlet DC motor; 72—Second mounting base; 73—Outlet coupling; 74—Second fixing rod; 75—Outlet connecting rod; 76—Outlet support base; 77—Second angle adjusting shaft; 78—Outlet guide vane;

[0045] 81—Outlet guide cone. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Application Overview

[0048] Currently, the adjustment of the installation angle of the guide vanes in the same row of the outer channel of the annular blade cascade is achieved through the blade tip connecting shaft, flange seat, transmission rod, spherical bearing, linkage rod, roller frame, and drive collar. The stepper motor rotates, driving the drive collar to rotate along with the linkage rod. While the linkage rod achieves rotational motion, the circumferential force is converted into the rotational torque required by the transmission rod through the spherical bearing and hinge bolt. The transmission rod drives the guide vane to rotate, thereby changing the installation angle of the guide vane. Since the installation angle and the angle of attack change the same value, the angle of attack of the incoming flow of the guide vane can be adjusted.

[0049] Exemplary dynamic annular cascade

[0050] Figure 1 This is a schematic diagram of the external structure of a dynamic annular blade cascade. The dynamic annular blade cascade includes: an inlet guide vane section casing 2, which is a cylindrical structure open at both ends. Inside the inlet guide vane section casing 2 is an inner inlet guide vane section pipe 21, which is a cylindrical structure. The inner inlet guide vane section pipe 21 is fitted inside the inlet guide vane section casing 2 and is coaxially arranged with the inlet guide vane section casing 2. Due to the radius difference between the inner inlet guide vane section pipe 21 and the inlet guide vane section casing 2, a first... An assembly area; multiple inlet guide vanes 38, arranged circumferentially around the centerline of the inner pipe 21 of the inlet guide vane section; multiple first adjustment mechanisms, corresponding one-to-one with the multiple inlet guide vanes 38, arranged circumferentially on the inlet guide vane section casing 2. The actuators of the first adjustment mechanisms penetrate the outer shell of the inlet guide vane section casing 2. When the actuators of the first adjustment mechanisms enter the first assembly area inside the inlet guide vane section casing 2, the actuator of each first adjustment mechanism connects to the corresponding inlet guide vane 38, allowing each inlet guide vane 38 to independently rotate and adjust its installation angle, such as... Figure 2 As shown, the inlet guide cone 11, the inner pipe 21 of the inlet guide vane section, the inner pipe of the test section, the inner pipe 51 of the support section, the inner pipe 61 of the outlet guide vane section, and the outlet guide cone 81 are connected in sequence to form the main test channel.

[0051] It should be further pointed out that the position of each first adjustment mechanism is adapted to the position of the inlet guide vane 38. The inlet guide vane 38 is arranged circumferentially inside the inlet guide vane section casing 2 and is relatively independent from the inner pipe 21 of the inlet guide vane section. The rotating end of the first adjustment mechanism is connected to the inlet guide vane 38 to realize the rotation of the inlet guide vane 38. During the test, based on the control of the circumferential non-uniformity of the incoming flow conditions, it has the test capability to simulate the circumferential non-uniformity of airflow caused by processing, installation, intake distortion, exhaust distortion, etc. By rotating the actuator end of the inlet DC motor arranged in a ring in sequence, the installation angle of one inlet guide vane 38 can be adjusted individually or several inlet guide vanes 38 locally. The non-linkage of the drive of the inlet DC motor improves the flexibility of the installation angle of the inlet guide vane 38: single, partial, multiple, or overall adjustment.

[0052] In one embodiment, the system further includes: an outlet guide vane section casing 6, which is also a cylindrical structure open at both ends; an outlet guide vane section inner pipe 61 is provided inside the outlet guide vane section casing 6, which is also a cylindrical structure; due to the radius difference between the outlet guide vane section inner pipe 61 and the outlet guide vane section casing 6, a second assembly area is formed between the outlet guide vane section inner pipe 61 and the outlet guide vane section casing 6; a plurality of outlet guide vanes 78, arranged circumferentially in the second assembly area with the centerline of the outlet guide vane section inner pipe 61 as the axis; and a plurality of second adjustment mechanisms, each corresponding to one of the plurality of outlet guide vane section inner pipes 61. Two adjustment mechanisms are sequentially arranged circumferentially on the outlet guide vane section casing 6. The execution end of the second adjustment mechanism penetrates the outer shell of the outlet guide vane section casing 6. When the execution end of the second adjustment mechanism enters the second assembly area, it connects with the corresponding outlet guide vane 78, so that each outlet guide vane 78 can be independently rotated to adjust the installation angle. During the test, depending on the test requirements, the outlet guide vane 78 or the inlet guide vane 38 can be adjusted, or both the outlet guide vane 78 and the inlet guide vane 38 can be adjusted simultaneously. In this embodiment, the inlet DC motor and the outlet DC motor provide drive for the individual or coordinated adjustment of the outlet guide vane 78 or the inlet guide vane 38.

[0053] It should be further pointed out that the position of each second adjustment mechanism is adapted to the position of the outlet guide vane 78. The outlet guide vane 78 is arranged circumferentially in the outlet guide vane section casing 6 and is relatively independent from the inner pipe 61 of the outlet guide vane section. The rotating end of the second adjustment mechanism is connected to the outlet guide vane 78 to realize the rotation of the outlet guide vane 78.

[0054] In one embodiment, the first adjustment mechanism includes: an imported DC motor 31 having a rotational output end; and a first angle adjustment shaft 37, one end of which is connected to an imported guide vane 38, and the other end of which is connected to the rotational output end of the imported DC motor 31 via an imported coupling 33.

[0055] It should be further pointed out that each imported DC motor corresponds to an imported guide vane 38. The controller of the imported DC motor receives a pulse signal from the host computer and triggers the imported DC motor to rotate, thereby driving the imported guide vane 38 connected through the imported coupling 37 to rotate at a certain angle. The length of the pulse signal can be adjusted by the output of the host computer to adapt to different adjustment requirements of the installation angle of the imported guide vane 38.

[0056] In one embodiment, the second adjustment mechanism includes: an outlet DC motor 71 having a rotational output end; and a second angle adjustment shaft 77, one end of which is connected to an outlet guide vane 78, and the other end of which is connected to the rotational output end of the outlet DC motor 71 via an outlet coupling 73.

[0057] It should be further pointed out that each outlet DC motor 71 corresponds to an outlet guide vane 78. The controller of the outlet DC motor 71 receives a pulse signal from the host computer and triggers the inlet DC motor to rotate, thereby driving the outlet guide vane 78 connected through the outlet coupling 77 to rotate at a certain angle. The length of the pulse signal can be adjusted by the output of the host computer to adapt to different adjustment requirements of the installation angle of the outlet guide vane 78.

[0058] In one embodiment, the inlet guide vane section casing 2 is connected and fixed to the outlet guide vane section casing 6 via the support section casing 5 to form a flow channel. The first angle adjustment shaft 37 is driven to rotate by the inlet DC motor 31 to adjust the installation angle of the corresponding connected inlet guide vane 38, and / or the second angle adjustment shaft 77 is driven by the outlet DC motor 71 to adjust the installation angle of the corresponding connected outlet guide vane 78.

[0059] Furthermore, the outer wall of the imported DC motor 31 is fitted with a first mounting base 32, which is fixed relative to the outer wall of the imported guide vane section casing 2; the outer wall of the exported DC motor 71 is fitted with a second mounting base 72, which is fixed relative to the outer wall of the exported guide vane section casing 6.

[0060] It should be further pointed out that each inlet guide vane 38 is adjusted using the inlet DC motor 31 and each outlet guide vane 78 is adjusted using the outlet DC motor 71. The inlet DC motor 31 and the outlet DC motor 71 are introduced as new vibration sources. In order to reduce their interference in the experiment, it is necessary to guide the vibration generated by the inlet DC motor 31 away from the inlet guide vane section casing 2 and the vibration generated by the outlet DC motor 71 away from the outlet guide vane section casing 6. In order to achieve the purpose of guidance, firstly, the first mounting base 32 does not contact the inlet guide vane section casing 2 and the second mounting base 72 does not contact the outlet guide vane section casing 6 to avoid direct contact of the vibration sources.

[0061] In one embodiment, a shock-absorbing mechanism is also included, comprising: a plurality of first fixed rods 34, the two ends of which are respectively connected to adjacent first mounting seats 32, forming a first annular structure in which the first fixed rods 34 and the first mounting seats 32 are connected at intervals; a pair of inlet connecting rods 35, any one of which is disposed on the first fixed rod 34, and the line connecting the pair of inlet connecting rods 35 is parallel to the horizontal plane; and a pair of inlet support seats 36, which are respectively connected to the pair of inlet connecting rods 35. It should be further noted that, on the premise that the first mounting seat 32 is not in contact with the inlet guide vane section casing 2, it is necessary to guide away the vibration generated by the operation of the inlet DC motor 31. The first fixed rods 34 are used to connect two adjacent first mounting seats 32, and the first mounting seats 32 and the first fixed rods 34 are arranged at intervals to form a first annular structure. At this time, the vibration can be guided away by contacting any point of the first annular structure, and the vibration is transmitted to the inlet support seat 36 and finally to the ground by the inlet connecting rods 35 connected to the first fixed rods 34.

[0062] The vibration damping mechanism also includes multiple second fixed rods 74, with both ends of each second fixed rod 74 connected to adjacent second mounting seats 72, forming a second annular structure in which the second fixed rods 74 and the second mounting seats 72 are spaced apart and connected; a pair of outlet connecting rods 75, with any one of the outlet connecting rods 75 mounted on the second fixed rod 74, and the line connecting the pair of outlet connecting rods 75 parallel to the horizontal plane; and a pair of outlet support seats 76, each connected to the pair of outlet connecting rods 75. It should be further noted that, without contact between the second mounting seats 72 and the outlet guide vane section casing 6, it is necessary to guide away the vibration generated by the operation of the outlet DC motor 71. The second fixed rods 74 are used to connect two adjacent second mounting seats 72, and the second mounting seats 72 and the second fixed rods 74 are spaced apart and connected to form a second annular structure. At this time, the vibration can be guided away by contacting any point of the second annular structure, and the vibration is transmitted to the outlet support seat 76 and finally to the ground by the outlet connecting rods 75 connected to the second fixed rods 74.

[0063] This invention also provides a dynamic experimental device for compressor annular blade cascades, comprising, according to the above-described dynamic annular blade cascade, in the dynamic test of compressor annular blade cascades, controlling the installation angles of the inlet guide vanes 38 and 78 by using an inlet DC motor and an outlet DC motor respectively, to achieve control of the circumferential non-uniformity of the incoming flow conditions, thereby simulating the test capability of circumferential non-uniform airflow caused by processing, installation, intake distortion, exhaust distortion, etc.; by configuring an inlet DC motor for each inlet guide vane and an outlet DC motor for each outlet guide vane, and controlling the installation angles of the inlet and outlet guide vanes in real time by the motors, achieving dynamic adjustment of incoming flow conditions (such as angle of attack, flow rate, etc.);

[0064] In the specific test process, by adjusting the local motor parameters to control the installation angle of the local inlet guide vane and outlet guide vane, the circumferential non-uniformity of the incoming flow conditions can be controlled, and the test capability can be used to simulate the circumferential non-uniformity of airflow caused by processing, installation, intake distortion, exhaust distortion, etc.

[0065] To mitigate the new vibration effects caused by imported and exported DC motors, the motor mounting base is connected to the mounting base fixing rod and then fixed to the ground via a connecting rod and support base. This cuts off the transmission path of vibrations generated by the motor movement to the guide casing and reduces the vibration of the annular blade cascade body.

[0066] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dynamic annular cascade, characterized in that, The utility model relates to a kind of inlet guide vane segment machine housings (2), the inlet guide vane segment machine housings (2) inside is equipped with inlet guide vane segment inner side pipe (21), and the first assembly area is formed between the inlet guide vane segment inner side pipe (21) and inlet guide vane segment machine housings (2);Multiple inlet guide vanes (38) are arranged in the first assembly area with the center line of the inlet guide vane segment inner side pipe (21) as the axis;Multiple first adjusting mechanisms are arranged one by one with the multiple inlet guide vanes (38), and the multiple first adjusting mechanisms are sequentially arranged in the inlet guide vane segment machine housings (2) in a ring shape, the execution end of each first adjusting mechanism is connected with the corresponding inlet guide vane (38) after penetrating the shell of the inlet guide vane segment machine housings (2), so that each inlet guide vane (38) is independently rotated to adjust the installation angle;The first adjusting mechanism includes: inlet DC motor (31), the inlet DC motor (31) has rotating output end;First angle adjusting shaft (37), one end of the first angle adjusting shaft is connected with the inlet guide vane (38), and the other end of the first angle adjusting shaft is connected with the rotating output end of the inlet DC motor (31) through inlet shaft coupling (33);Outlet guide vane segment machine housings (6) are provided with outlet guide vane segment inner side pipe (61) inside, and the second assembly area is formed between the outlet guide vane segment inner side pipe (61) and the outlet guide vane segment machine housings (6);Multiple outlet guide vanes (78) are arranged in the second assembly area with the center line of the outlet guide vane segment inner side pipe (61) as the axis;Multiple second adjusting mechanisms are arranged one by one with the multiple outlet guide vanes (78), and the multiple second adjusting mechanisms are sequentially arranged in the outlet guide vane segment machine housings (6) in a ring shape, the execution end of each second adjusting mechanism is connected with the corresponding outlet guide vane (78) after penetrating the shell of the outlet guide vane segment machine housings (6), so that each outlet guide vane (78) is independently rotated to adjust the installation angle;The second adjusting mechanism includes: outlet DC motor (71), the outlet DC motor (71) has rotating output end;Second angle adjusting shaft (77), one end of the second angle adjusting shaft is connected with the outlet guide vane (78), and the other end of the second angle adjusting shaft is connected with the rotating output end of the outlet DC motor (71) through outlet shaft coupling (73);The first mounting base (32) is sleeved on the outer wall of the inlet DC motor (31), and the first mounting base (32) is fixed relative to the outer wall of the inlet guide vane segment machine housings (2);The second mounting base (72) is sleeved on the outer wall of the outlet DC motor (71), and the second mounting base (72) is fixed relative to the outer wall of the outlet guide vane segment machine housings (6). ​ ​ ​ ​ ​ ​ ​ The shock-absorbing mechanism comprises: a plurality of first fixed rods (34), two ends of the first fixed rods (34) being connected with adjacent first mounting seats (32) respectively, forming a first annular structure with the first fixed rods (34) and the first mounting seats (32) being connected at intervals; a pair of inlet connecting rods (35), any one of the inlet connecting rods (35) being arranged on the first fixed rods (34), and the connecting line of the pair of inlet connecting rods (35) being parallel to the horizontal plane; a pair of inlet support seats (36), being connected with the pair of inlet connecting rods (35) respectively; a plurality of second fixed rods (74), two ends of the second fixed rods (74) being connected with adjacent second mounting seats (72) respectively, forming a second annular structure with the second fixed rods (74) and the second mounting seats (72) being connected at intervals; a pair of outlet connecting rods (75), any one of the outlet connecting rods (75) being arranged on the second fixed rods (74), and the connecting line of the pair of outlet connecting rods (75) being parallel to the horizontal plane; a pair of outlet support seats (76), being connected with the pair of outlet connecting rods (75) respectively.

2. The dynamic annular cascade according to claim 1, characterized in that The inlet guide vane segment casing (2) is communicated and fixed with the outlet guide vane segment casing (6) through the support segment casing (5), forming a guide flow channel, the first angle adjusting shaft (37) is driven to rotate by the inlet DC motor (31) to adjust the installation angle of the corresponding connected inlet guide vane (38), and / or the second angle adjusting shaft (77) is driven by the outlet DC motor (71) to adjust the installation angle of the corresponding connected outlet guide vane (78).

3. A dynamic experimental device for a compressor annular cascade, characterized in that, The dynamic annular cascade comprises the dynamic annular cascade according to any one of claims 1 to 2.

Images