Plending chamber wall plate moving mechanism of plane cascade tester

Abstract

The utility model discloses a moving mechanism for a plenum chamber wall plate of a plane cascade tester, the plenum chamber wall plate comprises a first wall plate and a second wall plate, and an airflow channel is arranged in the plane cascade tester. The moving mechanism comprises a translation mechanism for controlling the second wall plate to move along the axis direction of the airflow channel relative to the first wall plate, and a lifting mechanism for controlling the first wall plate and the second wall plate to lift and move in the vertical direction; the translation mechanism comprises a worm, a transmission plate and a driving device for driving the worm to rotate, the worm is installed on the first wall plate through a bearing seat, a long through hole is formed in the first wall plate, the transmission plate penetrates through the long through hole and then is installed on the second wall plate, the transmission plate is provided with a hole for the worm to penetrate through, and the hole is a turbine hole in meshing transmission with the worm; the lifting mechanism is a lead screw transmission mechanism, the lead screw transmission mechanism comprises a lead screw assembly, and the lead screw assembly is connected with the first wall plate. The translation mechanism can rapidly achieve rapid front-back movement of the second wall plate, the lead screw transmission mechanism drives the plenum chamber wall plate to ascend and descend, and the movement process is accurate, stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of blade cascade test equipment, in particular to a chamber wall plate moving mechanism of a plane blade cascade tester. Background Art

[0002] Based on the continuous air supply conditions and existing technical conditions, the construction of a blade wind tunnel test platform covering the subsonic and transonic range is a measure to alleviate the domestic research and development test needs of the two aircraft to a certain extent. The plane blade tester of the blade wind test platform, relying on experimental conditions, can carry out research on aerodynamic theories and flow control technologies related to aircraft engines and gas turbines, and contribute to the development of national defense and the national economy. Based on the plane blade tester, the development of related experimental technologies and the research and development of experimental equipment can also be carried out.

[0003] The main function of the stationary wall panels of the plane blade tester is to form flow channels of different heights between the upper and lower stationary chambers of the plane blade test section according to different test requirements, and extend them to the test blades through the forward and backward movement of the stationary wall panels to prevent the airflow from running wildly. Therefore, the stationary wall panels need to be able to move horizontally and / or up and down. Traditional stationary wall panels are usually controlled by gear racks for movement and by threads for lifting and lowering. However, the meshing of gear racks is prone to meshing gaps, and the lifting and lowering of threads will loosen with the length of use, and the rising adjustment is difficult to synchronize, making it difficult to level the flow channel. In addition, traditional adjustments require more than two people to operate at the same time, which is time-consuming and labor-intensive. Therefore, the stationary wall panels of traditional plane blade testers cannot be adjusted quickly and accurately during adjustment, or there are defects such as looseness after adjustment, which can easily damage the test blades and cannot truly meet the test requirements.

[0004] The patent with announcement number CN113029574B discloses a plane blade cascade test section wall panel with adjustable length. The plane blade cascade test section wall panel includes a rotating plate, a length adjuster, a guide rail pair, and a translation plate; the rotating plate is a straight plate, the front end of the rotating plate is a fixed end, the fixed end is fixed to the nozzle outlet through a pin shaft, and the rear end of the rotating plate is a free end; the upper surface of the rotating plate is installed with a guide rail. The translation plate is another straight plate, the upper surface of the translation plate is fixed with a slider, and the slider is clamped on the guide rail. The fixed end of the length adjuster is installed on the upper surface of the rotating plate, and the moving end of the length adjuster is connected to the rear end of the translation plate through a pin shaft. The length adjuster drives the slider on the translation plate to move along the guide rail to realize the forward and backward movement of the translation plate. The plane blade cascade test section wall panel can realize the length adjustment of the test section wall panel according to the blade cascade test conditions, and the operation is convenient, the positioning is simple, the length adjustment accuracy is high, and it can save the test preparation time and improve the test efficiency.

[0005] The above patent realizes the length adjustment of the test section wall panel by setting a length adjuster, but it mainly focuses on the precise adjustment and positioning of the length, does not mention the adjustment speed and the lifting and lowering adjustment of the test section wall panel, and its related structure for length adjustment is relatively complex.

[0006] The patent with announcement number CN112985745B discloses a wind tunnel test section wall panel expansion angle adjustment mechanism that maintains the continuity of the curvature of the inner flow channel surface. The adjustment mechanism is divided into an upper group and a lower group with the same structure, which are symmetrically arranged on the upper and lower wall panels of the test section. The upper group includes a horizontal flexible plate, the front end of which is fixed on the fixed point I on the lower surface of the inner wall of the wind tunnel chamber, and the rear end of the flexible plate is fixed on the horizontal lower surface of the front end of the wind tunnel test section wall panel; it includes a front hinge mechanism that is symmetrically distributed on the vertical end surface of the front end of the wall panel; and it also includes a rear hinge mechanism that is symmetrically distributed on the upper part of the wall panel. The spiral elevator drives the rear hinge mechanism, and the rear hinge mechanism drives the front hinge mechanism to cause the wall panel angle change and the elastic deformation of the flexible plate, thereby changing the expansion angle of the test section wall panel. The adjustment mechanism is a rigid-flexible coupling structure. During the expansion angle adjustment process of the wind tunnel test section wall panel, the internal flow channel surface curvature is continuously maintained through the elastic deformation of the flexible plate.

[0007] The above patent mainly adjusts the expansion angle of the wall panel, and does not involve the length adjustment and lifting adjustment of the wall panel. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide a moving mechanism that can quickly and accurately adjust the stationary room wall panels in the length direction and the vertical direction, and the adjustment is stable and reliable, in view of the defects of the prior art.

[0009] The purpose of the utility model is achieved through the following technical solutions:

[0010] A moving mechanism for a stationary wall plate of a plane cascade tester, the stationary wall plate comprising a first wall plate and a second wall plate, the plate surfaces of the first wall plate and the second wall plate having a movable overlapping portion, an airflow channel being provided in the plane cascade tester, the first wall plate being away from the center of the airflow channel, the second wall plate being close to the center of the airflow channel, the moving mechanism comprising a translation mechanism for controlling the second wall plate to move relative to the first wall plate along the axial direction of the airflow channel, and a lifting mechanism for controlling the first wall plate and the second wall plate to move up and down in a vertical direction;

[0011] The translation mechanism includes a worm, a transmission plate and a driving device for driving the worm to rotate, wherein the worm is mounted on a first wall plate through a bearing seat, a long through hole is provided on the first wall plate, the transmission plate passes through the long through hole and is mounted on a second wall plate, the transmission plate has a hole for the worm to pass through, and the hole is a turbine hole for meshing with the worm for transmission;

[0012] The lifting mechanism is a screw transmission mechanism, which includes a screw assembly, and the screw assembly is connected to the first wall plate.

[0013] Furthermore, the first wall panel and the second wall panel are connected by a dovetail groove structure.

[0014] Furthermore, the dovetail groove structure includes a dovetail groove opened on the wall surface of the first wall plate and a boss arranged on the second wall plate and adapted to the dovetail groove.

[0015] Furthermore, the boss and / or the dovetail groove are provided with a notch on the contact surface thereof to reduce sliding friction.

[0016] Furthermore, a gap adjustment strip is sandwiched between the dovetail groove surface of the dovetail groove and the boss.

[0017] Furthermore, the first wall plate is provided with a threaded hole, into which a gap adjustment screw is screwed to abut against the gap adjustment strip.

[0018] Furthermore, the length dimension of the long through hole is a limit distance of sliding of the second wall plate relative to the first wall plate.

[0019] Furthermore, the driving device of the translation mechanism is a servo motor.

[0020] Furthermore, the screw transmission mechanism also includes a hand wheel, and the screw assembly is raised and lowered by shaking the hand wheel.

[0021] Furthermore, at least two screw rod assemblies are arranged on the first wall plate at intervals, and adjacent screw rod assemblies are lifted and lowered synchronously via couplings and transmission shafts.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The translation mechanism cooperates with the driving device, the worm and the transmission plate to quickly realize the rapid forward and backward movement of the second wall plate, and the worm and the turbine hole of the transmission plate are precisely matched to ensure that the movement process is accurate, stable and reliable; the first wall plate and the second wall plate are connected by a dovetail groove structure to ensure that the relative movement process is smooth and does not disengage.

[0024] The screw transmission mechanism is used to drive the chamber wall plate to rise and fall, with high precision, no loosening during the transmission process, easy operation, accurate positioning, and can achieve rapid contraction or expansion of the flow channel formed between the upper and lower chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the stationary wall plate moving mechanism of the plane cascade tester described in Example 1 (structures such as the hand wheel and coupling are not shown);

[0026] Figure 2 for Figure 1 Detailed diagram of the translation mechanism and the lifting mechanism;

[0027] Figure 3 A schematic diagram of a transmission plate passing through a long through hole as described in Example 1;

[0028] Figure 4 This is a cross-sectional view of the dovetail groove structure described in Example 2. DETAILED DESCRIPTION

[0029] In order to clearly illustrate the technical features of the present solution, the present technical solution is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] Example 1

[0035] A planar cascade tester chamber wall plate moving mechanism is provided. The chamber is divided into an upper chamber and a lower chamber. The movement of the wall plate of the upper chamber is now explained. The movement of the wall plate of the lower chamber is exactly the same: Figure 1 As shown, the stationary chamber wall plate includes a first wall plate 1 and a second wall plate 2, wherein the first wall plate 1 is a fixed plate, the second wall plate 2 is a movable plate, the plate surfaces of the first wall plate 1 and the second wall plate 2 have a movable overlapping portion, an airflow channel 3 is provided between the upper stationary chamber and the lower stationary chamber, the first wall plate 1 is arranged away from the center of the airflow channel, and the second wall plate 2 is arranged close to the center of the airflow channel. The moving mechanism includes a translation mechanism 4 for controlling the second wall plate 2 to move relative to the first wall plate 1 along the axial direction of the airflow channel 3, and a lifting mechanism 5 for controlling the first wall plate 1 and the second wall plate 2 to move up and down together in the vertical direction.

[0036] like Figure 2 As shown, the translation mechanism 4 includes a worm 41, a transmission plate 42 and a driving device 43 for driving the worm to rotate. Bearing seats 44 are respectively arranged at both ends of the worm 41. The bearing seats 44 are mounted on the first wall plate 1 by screws. The driving device 43 is arranged in a fixing seat 45. The fixing seat 45 is fixed to the first wall plate 1 by bolts. The transmission plate 42 has a hole for the worm 41 to pass through, and the hole is a turbine hole for meshing with the worm 41. Figure 3 As shown, a long through hole 11 is provided on the first wall plate 1 at the portion overlapping with the second wall plate 2, and a transmission plate 42 passes through the long through hole 11. After passing through, the end of the transmission plate 42 away from the worm 41 is fixedly mounted on the second wall plate 2 by screws. At this time, the transmission plate 42 becomes a link for the worm 41 to rotate and drive the second wall plate 2 to move. When the worm 41 is driven to rotate by the driving device 43, since the two ends of the worm 41 are fixed, the transmission plate 42 meshed with the worm 41 through the turbine hole is forced to move.

[0037] The driving device 43 of this embodiment is a servo motor, which controls the servo motor to rotate forward and reverse, driving the worm 41 to rotate forward and reverse, thereby realizing the second wall panel 2 to quickly move forward and backward in the aforementioned axial direction, completing the forward and backward extension of the room wall panel.

[0038] The first wall panel 1 and the second wall panel 2 are preferably connected by a dovetail groove structure, which includes a dovetail groove 12 opened on the wall surface of the first wall panel 1 and a boss 21 arranged on the second wall panel 2 and adapted to the dovetail groove, wherein the boss 21 and the dovetail groove 12 are respectively provided with a notch 23 on the contact surface of the two for reducing sliding friction, so as to reduce the friction force when the first wall panel 1 and the second wall panel 2 slide relative to each other, thereby reducing the driving force and ensuring that the second wall panel 2 can move smoothly.

[0039] The movement of the second wall panel 2 has a threshold. To simplify the design of the moving mechanism, in this embodiment, the length dimension of the long through hole 11 is directly set to the limit distance of the sliding of the second wall panel 2 relative to the first wall panel 1, that is, the second wall panel 2 moves to the two ends of the long through hole 11 corresponding to the limit movement positions of the second wall panel respectively.

[0040] like Figure 1 and Figure 2 As shown, the lifting mechanism 5 is a screw transmission mechanism, which is integrally mounted on some fixed structure of the stationary chamber, and the screw transmission mechanism includes a screw assembly 51, and the screw assembly 51 is connected to the first wall panel 1. The screw transmission mechanism is a conventional application in terms of mechanical structure, and its essence is a turbine and screw transmission. In order to facilitate the control of the transmission of the screw, the screw transmission mechanism also includes a handwheel 52, and the handwheel shaft of the handwheel 52 is connected to the turbine (the position of the handwheel and the turbine is installed on some fixed structure of the stationary chamber as mentioned above, and the position remains unchanged). By shaking the handwheel 52, the turbine rotates, thereby driving the screw assembly 51 to rise and fall. In order to improve the rigidity and strength of the screw assembly, a steel column 511 is used at the end of the screw assembly 51 close to the first wall panel 1 instead of the screw 512, that is, the screw assembly includes a screw 511 and a steel column 512, and the two are connected by a flange, and the screw assembly 51 is stably connected to the first wall panel 1 through the steel column 512.

[0041] In addition, in order to ensure the uniform and stable lifting of the whole chamber wall plate, at least two screw rod assemblies 51 are preferably arranged at intervals on the first wall plate 1. In this embodiment, there are two screw rod assemblies 51, which are roughly evenly distributed at both ends of the first wall plate 1. The two screw rod assemblies 51 are synchronously lifted and lowered through the coupling 53 and the transmission shaft 54, that is, only one hand wheel 52 is provided, which can make the two screw rod assemblies 51 perform synchronous and coordinated lifting and lowering actions, drive the chamber wall plate to move up and down, and realize the rapid contraction or expansion of the flow channel formed between the upper chamber / lower chamber of the plane cascade tester. The screw rod transmission mechanism usually has a self-locking function, and can maintain the current state after being adjusted to the position required for the test until the position needs to be changed next time.

[0042] It should be noted that: Figure 1 As shown, the first wall panel 1 needs to be fixed to the test section 6 of the plane blade tester by bolts and other fasteners to prevent the aerodynamic force from being too large during the test. Therefore, when the stationary wall panel needs to be raised and lowered, the bolts at that location need to be loosened and then tightened after the stationary wall panel is adjusted into place.

[0043] Example 2

[0044] A planar cascade tester chamber wall plate moving mechanism, such as Figure 1 As shown, the stationary chamber wall plate includes a first wall plate 1 and a second wall plate 2, wherein the first wall plate 1 is a fixed plate, the second wall plate 2 is a movable plate, the plate surfaces of the first wall plate 1 and the second wall plate 2 have a movable overlapping portion, an airflow channel 3 is provided between the upper stationary chamber and the lower stationary chamber, the first wall plate 1 is arranged away from the center of the airflow channel, and the second wall plate 2 is arranged close to the center of the airflow channel. The moving mechanism includes a translation mechanism 4 for controlling the second wall plate 2 to move relative to the first wall plate 1 along the axial direction of the airflow channel 3, and a lifting mechanism 5 for controlling the first wall plate 1 and the second wall plate 2 to move up and down together in the vertical direction.

[0045] like Figure 2 As shown, the translation mechanism 4 includes a worm 41, a transmission plate 42 and a driving device 43 for driving the worm to rotate. Bearing seats 44 are respectively arranged at both ends of the worm 41. The bearing seats 44 are mounted on the first wall plate 1 by screws. The driving device 43 is arranged in a fixing seat 45. The fixing seat 45 is fixed to the first wall plate 1 by bolts. The transmission plate 42 has a hole for the worm 41 to pass through, and the hole is a turbine hole for meshing with the worm 41. Figure 3 As shown, a long through hole 11 is provided on the first wall plate 1 at the portion overlapping with the second wall plate 2, and a transmission plate 42 passes through the long through hole 11. After passing through, the end of the transmission plate 42 away from the worm 41 is fixedly mounted on the second wall plate 2 by screws. At this time, the transmission plate 42 becomes a link for the worm 41 to rotate and drive the second wall plate 2 to move. When the worm 41 is driven to rotate by the driving device 43, since the two ends of the worm 41 are fixed, the transmission plate 42 meshed with the worm 41 through the turbine hole is forced to move.

[0046] The driving device 43 of this embodiment is a servo motor, which controls the servo motor to rotate forward and reverse, driving the worm 41 to rotate forward and reverse, thereby realizing the second wall panel 2 to quickly move forward and backward in the aforementioned axial direction, completing the forward and backward extension of the room wall panel.

[0047] The first wall panel 1 and the second wall panel 2 are preferably connected by a dovetail groove structure, which includes a dovetail groove 12 opened on the wall surface of the first wall panel 1 and a boss 21 arranged on the second wall panel 2 and adapted to the dovetail groove, wherein the boss 21 and the dovetail groove 12 are respectively provided with a notch 23 on the contact surface of the two for reducing sliding friction, so as to reduce the friction force when the first wall panel 1 and the second wall panel 2 slide relative to each other, thereby reducing the driving force and ensuring that the second wall panel 2 can move smoothly.

[0048] The movement of the second wall panel 2 has a threshold. To simplify the design of the moving mechanism, in this embodiment, the length dimension of the long through hole 11 is directly set to the limit distance of the sliding of the second wall panel 2 relative to the first wall panel 1, that is, the second wall panel 2 moves to the two ends of the long through hole 11 corresponding to the limit movement positions of the second wall panel respectively.

[0049] like Figure 1 and Figure 2 As shown, the lifting mechanism 5 is a screw transmission mechanism, which is integrally mounted on some fixed structure of the stationary chamber, and the screw transmission mechanism includes a screw assembly 51, and the screw assembly 51 is connected to the first wall panel 1. The screw transmission mechanism is a conventional application in terms of mechanical structure, and its essence is a turbine and screw transmission. In order to facilitate the control of the transmission of the screw, the screw transmission mechanism also includes a handwheel 52, and the handwheel shaft of the handwheel 52 is connected to the turbine (the position of the handwheel and the turbine is installed on some fixed structure of the stationary chamber as mentioned above, and the position remains unchanged). By shaking the handwheel 52, the turbine rotates, thereby driving the screw assembly 51 to rise and fall. In order to improve the rigidity and strength of the screw assembly, a steel column 511 is used at the end of the screw assembly 51 close to the first wall panel 1 instead of the screw 512, that is, the screw assembly includes a screw 511 and a steel column 512, and the two are connected by a flange, and the screw assembly 51 is stably connected to the first wall panel 1 through the steel column 512.

[0050] The difference between this embodiment and embodiment 1 is that: Figure 4 As shown, a gap adjustment strip 71 is sandwiched between the dovetail groove surface and the boss of the dovetail groove. In addition, a threaded hole is provided on the first wall plate 1. A gap adjustment screw 72 is screwed into the threaded hole to abut against the gap adjustment strip 71. By adjusting the gap adjustment screw 72 and the gap adjustment strip 71, the gap between the first wall plate 1 and the second wall plate 2 can be made uniform, which is conducive to smoother movement when the two move relative to each other. The gap adjustment screw is generally adjusted in place when the first wall plate and the second wall plate are assembled, and it does not need to be adjusted frequently afterwards.

[0051] Example 3

[0052] The difference between this embodiment and embodiment 1 is that: a limit setting is added for the movement of the second wall plate, refer to Figure 2The first wall plate 1 is provided with a limiting step 13 at the end of the dovetail groove near the airflow channel entrance, and the second wall plate is provided with a convex surface adapted to the limiting step. The limiting setting of this embodiment is a supplement to the limiting when the second wall plate moves toward the airflow channel entrance, which is equivalent to a double limiting with the transmission plate.

[0053] The mobile mechanism of the utility model has the advantages of saving labor, simple and efficient adjustment, accurate and reliable adjustment and positioning, etc. According to statistics, the traditional blade tester requires at least 3-4 people plus fitter cooperation to complete the work. The mobile mechanism can reduce the number of people to 2-3, and no fitter cooperation is required; in terms of time, the work that originally took at least 3 hours to complete is reduced to only about 0.5 hours. At the adjustment operation level, there is no need to invest in external equipment such as cranes. The resident chamber wall panel can be quickly adjusted to the required position for the test only by controlling the servo motor and on-site manual control. The servo motor and the screw lifting mechanism have the advantages of accurate control, durability and reliability, and will not damage the test blades.

[0054] Obviously, the above embodiments are merely examples for clearly illustrating the technical solution of the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A mechanism for moving a stationary wall plate of a plane cascade tester, wherein the stationary wall plate comprises a first wall plate and a second wall plate, wherein the plate surfaces of the first wall plate and the second wall plate have a movable overlapping portion, wherein an airflow channel is provided in the plane cascade tester, wherein the first wall plate is away from the center of the airflow channel, and the second wall plate is close to the center of the airflow channel, wherein the mechanism is characterized in that: The moving mechanism includes a translation mechanism for controlling the second wall plate to move relative to the first wall plate along the axis direction of the airflow channel, and a lifting mechanism for controlling the first wall plate and the second wall plate to move up and down in the vertical direction; The translation mechanism includes a worm, a transmission plate and a driving device for driving the worm to rotate, wherein the worm is mounted on a first wall plate through a bearing seat, a long through hole is provided on the first wall plate, the transmission plate passes through the long through hole and is mounted on a second wall plate, the transmission plate has a hole for the worm to pass through, and the hole is a turbine hole for meshing with the worm for transmission; The lifting mechanism is a screw transmission mechanism, which includes a screw assembly, and the screw assembly is connected to the first wall plate.

2. The chamber wall plate moving mechanism of the plane cascade tester according to claim 1 is characterized in that: The first wall panel and the second wall panel are connected by a dovetail groove structure.

3. The stationary wall plate moving mechanism of the plane cascade tester according to claim 2 is characterized in that: The dovetail groove structure comprises a dovetail groove opened on the wall surface of the first wall plate and a boss arranged on the second wall plate and adapted to the dovetail groove.

4. The stationary wall plate moving mechanism of the plane cascade tester according to claim 3 is characterized in that: The boss and / or the dovetail groove are provided with a notch on the contact surface thereof to reduce sliding friction.

5. The stationary wall plate moving mechanism of the plane cascade tester according to claim 3 is characterized in that: A gap adjustment strip is also sandwiched between the dovetail groove surface of the dovetail groove and the boss.

6. The stationary wall plate moving mechanism of the plane cascade tester according to claim 5, characterized in that: The first wall plate is also provided with a threaded hole, into which a gap adjustment screw is screwed to abut against the gap adjustment strip.

7. The stationary wall plate moving mechanism of the plane cascade tester according to claim 1 is characterized in that: The length dimension of the long through hole is the limit distance of the second wall plate sliding relative to the first wall plate.

8. The stationary wall plate moving mechanism of the plane cascade tester according to claim 1 is characterized in that: The driving device of the translation mechanism is a servo motor.

9. The stationary wall plate moving mechanism of the plane cascade tester according to claim 1, characterized in that: The screw transmission mechanism also includes a hand wheel, and the screw assembly is lifted or lowered by shaking the hand wheel.

10. The stationary wall plate moving mechanism of the plane cascade tester according to claim 9, characterized in that: At least two screw rod assemblies are arranged on the first wall plate at intervals, and adjacent screw rod assemblies are lifted and lowered synchronously through couplings and transmission shafts.

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