A modular planar cascade experimental section assembly platform with adjustable pitch and angle

Abstract

A modular planar blade test section assembly platform with adjustable pitch and angle belongs to the technical field of blade tests. The platform adopts a basic platform to set a pitch adjustment module, an angle adjustment module, a push rod device and a cover module. The pitch adjustment plate combination section of the pitch adjustment module is aligned with the cover plate slot in the cover plate module to achieve the pushing in of the pitch adjustment assembly; the angle adjustment module is connected to the cover plate module, and the blade assembly is pushed in by the push rod device. The pitch adjustment module and the angle adjustment module are placed side by side, and repeated movement is achieved by a screw guide rail to achieve the purpose of alternating cooperation with the test section assembly module. The modular assembly platform can automatically operate to meet the plane blade test section assembly work under variable pitch and installation angle, and can effectively improve the efficiency of the plane blade test.

Description

Technical Field

[0001] The present invention relates to the technical field of plane blade cascade experimental devices, and in particular to a plane blade cascade test bench capable of realizing continuous and uniform adjustment of blade pitch and installation angle, and a method for using the same. Background Art

[0002] Cascades are a key component in power plants such as aircraft engines and gas turbines, and their performance significantly impacts the operating efficiency and stability of the entire power system. In-depth research into the performance of planar cascades requires extensive experimentation, of which the assembly of cascade test sections is particularly crucial. By establishing multiple sets of test sections, we can simulate various conditions, such as angles of attack, installation angles, and pitch variations, to explore their impact on the efficiency, stability, and reliability of the cascades. The quality and precision of cascade test section assembly directly impacts the accuracy and reliability of experimental results, thus significantly impacting the overall research outcome.

[0003] When conducting experimental studies on planar cascades, frequent assembly and adjustment of the experimental sections is often required to simulate different operating conditions and working conditions. However, traditional platforms for assembling planar cascade experimental sections typically use manual or semi-automatic methods, which are cumbersome and inefficient. Furthermore, assembling experimental sections with variable cascade pitch and installation angles requires significant manpower and time to adjust and assemble the various components. This not only increases experimental time and cost, but can also affect the accuracy and reliability of experimental results due to operational inaccuracies and instabilities.

[0004] To address this issue, some technologies have begun developing automated platforms for assembling experimental sections of planar cascades. For example, computer vision technology is used to precisely measure and adjust the position and attitude of cascades, while robotics is used for automated component adjustment and assembly. The development and application of these technologies will greatly improve the efficiency and accuracy of experimental research on planar cascades, thereby promoting the development and application of power plant technology.

[0005] In summary, the automation and efficiency of the planar cascade test section assembly platform is a key trend in this field and a crucial means of improving the performance and reliability of power plants. This invention addresses this need and has significant practical value and far-reaching research significance. Summary of the Invention

[0006] The present invention proposes a solution for a modular planar cascade experimental section assembly platform, which realizes continuous adjustment of the cascade angle and cascade pitch during the test section assembly process, improves experimental efficiency, and reduces experimental costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions: a modular planar cascade experimental section assembly platform with adjustable pitch and angle, comprising a base platform on which an angle adjustment module, a pitch adjustment module, a push rod device, a cover module, and a lead screw guide are arranged;

[0008] The cover module is arranged at one end of the basic platform, and the push rod device is arranged at the corresponding other end; the angle adjustment module adjusts the movement of the basic platform in the length direction through the small screw guide rail, and the grid pitch adjustment module adjusts the movement of the basic platform in the length direction through the grid pitch screw guide rail; the angle adjustment module and the grid pitch adjustment module adjust the movement of the basic platform in the width direction through the screw guide rail;

[0009] The angle adjustment module includes a blade assembly and an adjustment assembly; the blade assembly adopts the lower end of the blade connected to the lower step shaft, and the lower step shaft is arranged in the circular step keyway of the lower step platform; the upper end of the blade is connected to the upper step shaft, and the upper step shaft is arranged in the circular step keyway of the upper step platform; the blade assembly is arranged on the blade conveying slide rail;

[0010] A large screw guide rail is provided on the height adjustment platform of the adjustment assembly, and a screw slider on the large screw guide rail is connected to a connecting rod via a connecting plate; one end of an L-shaped crank is provided on the connecting rod via a pin, and the other end passes through the crank guide rail; the lower end of the crank guide rail is inserted into the keyway at the top end of the upper stepped shaft;

[0011] The propulsion motor in the pitch adjustment module is used to push the pitch plate in the upper pitch plate storage cavity into the pitch plate assembly section;

[0012] The cover plate module adopts an upper cover plate and a lower cover plate connected by support columns, an upper cover plate groove is provided below the upper cover plate, and a lower cover plate groove is provided above the lower cover plate.

[0013] The distance adjusting plate assembly section comprises an upper distance adjusting plate assembly section and a lower distance adjusting plate assembly section, wherein the distance adjusting plates are symmetrically arranged.

[0014] The pitch pad storage chamber stores pitch pads of different thicknesses. When the pitch pad combination size is determined, a given number of pitch pads are pushed into the pitch pad combination section by a propulsion motor to achieve a combination of pitch pads of different sizes.

[0015] The basic structure of the distance adjusting piece is T-shaped, and the distance adjusting pieces of different thicknesses are designed with inclined slopes of different lengths on their sides.

[0016] A method for assembling a modular planar cascade experimental section platform with adjustable cascade pitch and angle comprises the following steps:

[0017] S1 Cascade Angle Adjustment

[0018] S1.1 Blade angle rotation

[0019] When the motor starts, the lead screw in the large lead screw guide rail begins to rotate, driving the lead screw slider to move left and right, and then driving the connecting rod to move left and right through the connecting plate; the L-shaped crank drives the crank guide rail to rotate through one end of the crank guide rail, and the L-shaped crank can slide along the crank guide rail;

[0020] The crank guide rail rotates, driving the upper step shaft, blades and lower step shaft to rotate, realizing the rotation of the blade angle;

[0021] S1.2 Blade Angle Fixed

[0022] When the cascade rotates to the target angle, the motor stops running and the height adjustment platform starts working. By adjusting its height and orientation, it drives the connecting rod, L-shaped crank, crank guide rail and upper step shaft to separate. The blades, upper step shaft 2o, lower step shaft, upper step platform 2k and lower step platform are assembled as a whole and ready for the next work process.

[0023] S2 grating adjustment

[0024] The control system calculates the spacing plate combination scheme in each storage cavity according to the grid pitch value, pushes the spacing plates in the upper spacing plate storage cavity into the upper spacing plate combination section by the upper propulsion motor, and pushes the spacing plates in the lower spacing plate storage cavity into the lower spacing plate combination section by the lower propulsion motor;

[0025] S3 reciprocating loading

[0026] S3.1 Filling of the grating spacer

[0027] The angle adjustment module and the pitch adjustment module are driven by the lead screw guide rail to translate in the width direction of the basic platform. When the upper distance adjustment piece assembly section is aligned with the upper cover plate groove and the lower distance adjustment piece assembly section is aligned with the lower cover plate groove, the lead screw guide rail stops working; the pitch lead screw guide rail drives the pitch adjustment module to translate in the length direction of the basic platform. When the pitch adjustment module is in contact with the cover plate module, the pitch lead screw guide rail stops working.

[0028] The push rod device starts to operate, and the push rod pushes the matched grid pitch adjusting piece group into the cover plate slot to realize the filling of the grid pitch adjusting piece;

[0029] S3.2 Cascade filling

[0030] After the grating pitch adjusting piece is loaded, the push rod device returns to its original position, and the lead screw guide rail drives the angle adjustment module and the grating pitch adjustment module to translate in the width direction of the basic platform. When the upper step platform is aligned with the upper cover plate groove and the lower step platform is aligned with the lower cover plate groove, the lead screw guide rail stops working; the angle adjustment module is driven by the small lead screw guide rail to translate in the length direction of the basic platform. When the blade conveying slide rail is connected to the cover plate module, the small lead screw guide rail stops working; the push rod device starts to operate, and the push rod pushes the blade assembly that has completed the angle adjustment into the cover plate groove to realize the grating piece loading;

[0031] S3.3 Reciprocating work:

[0032] Repeat the above steps until all blade components and pitch adjusters are pushed into the cover plate slots, the test bench stops working, and the assembly is completed.

[0033] The present invention realizes continuous adjustment of the pitch and angle, meeting the assembly requirements of the planar blade test section under variable pitch and installation angle; disassembling the test section into a modular structure facilitates assembly and maintenance, and improves the maintainability of the platform; automated operation reduces manual intervention and improves test efficiency; and the propulsion mechanism and fixed structure ensure the accuracy of component pushing and the stability of the experiment.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] (1) Continuous adjustment of grating pitch and angle is achieved at the same time, meeting the assembly requirements of the plane cascade experimental section under variable grating pitch and installation angle;

[0036] (2) The test section is disassembled into a modular structure, which facilitates assembly and maintenance and improves the maintainability of the platform;

[0037] (3) Automated operation reduces manual intervention and improves test efficiency;

[0038] (4) It has a propulsion mechanism and a fixed structure to ensure the accuracy of component insertion and the stability of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a work process flow chart.

[0040] Figure 2 This is the overall structural diagram of a modular planar cascade experimental section assembly platform with adjustable grating pitch and angle.

[0041] Figure 3 It is a three-dimensional diagram of the angle adjustment module.

[0042] Figure 4 This is a top view of the angle adjustment module.

[0043] Figure 5 yes Figure 4 Middle AA section view.

[0044] Figure 6 This is the structure diagram of the grid pitch adjustment module.

[0045] Figure 7 It is the structural diagram of the test section assembly module.

[0046] Figure 8 It is a schematic diagram of the structure of the grating pitch adjusting plate.

[0047] Figure: 1, base platform, 2, angle adjustment module, 2a, height adjustment platform, 2b, large screw guide rail, 2c, screw slider, 2d, connecting plate, 2e, connecting rod, 2f, crank, 2g, pin, 2h, crank guide rail, 2i, small screw guide rail, 2j, blade conveying slide rail, 2k, step platform, 2l, blade, 2m, step shaft; 3, pitch adjustment module, 3a, upper pitch plate assembly section, 3b, upper pitch plate storage Cavity, 3c, upper propulsion motor, 3d, lower distance adjusting plate assembly section, 3e, lower distance adjusting plate storage cavity, 3f, lower propulsion motor; 4, push rod device; 5, cover module, 5a, upper cover, 5b, lower cover, 5c, support column, 5d, upper cover slot, 5e, lower cover slot; 6, screw guide rail, 7, pitch screw guide rail, 8, distance adjusting plate, 8a, 1mm distance adjusting plate, 8b, 5mm distance adjusting plate, 8c, 10mm distance adjusting plate. DETAILED DESCRIPTION

[0048] The purpose of the present invention is to realize the design of a test section assembly platform using the same cover plate model for different blade installation angles and different blade pitches, effectively reduce the time for test section processing and test bench modification, greatly improve experimental efficiency and reduce experimental costs.

[0049] Figures 1 to 8 A modular planar cascade experimental section assembly platform with adjustable pitch and angle is provided. The platform comprises a base platform 1, on which are mounted an angle adjustment module 2, a pitch adjustment module 3, a push rod assembly 4, a cover module 5, and a lead screw guide 6. The cover module 5 is disposed at one end of the base platform 1, and the push rod assembly 4 is disposed at the other end. The angle adjustment module 2 adjusts the longitudinal movement of the base platform via a small lead screw guide 2i, while the pitch adjustment module 3 adjusts the longitudinal movement of the base platform via a pitch lead screw guide 7. The angle adjustment module 2 and the pitch adjustment module 3 adjust the width of the base platform via the lead screw guide 6.

[0050] The angle adjustment module 2 includes a blade assembly and an adjustment assembly; the blade assembly adopts the lower end of the blade 2l to be connected to the lower step shaft 2m, and the lower step shaft 2m is set in the circular step keyway of the lower step platform 2n; the upper end of the blade 21 is connected to the upper step shaft 2o, and the upper step shaft 2o is set in the circular step keyway of the upper step platform 2k; the blade assembly is set on the blade conveying slide 2j; a large screw guide rail 2b is set on the height adjustment platform 2a in the adjustment assembly, and the screw slider 2c on the large screw guide rail 2b is connected to the connecting rod 2e through the connecting plate 2d; one end of the L-shaped crank 2f is set on the connecting rod 2e through the pin 2g, and the other end passes through the crank guide rail 2h; the lower end of the crank guide rail 2h is inserted into the keyway at the top of the upper step shaft 2o.

[0051] The propulsion motor in the pitch adjustment module 3 is used to push the pitch plates in the upper pitch plate storage chamber into the pitch plate assembly section; the pitch plate assembly section includes an upper pitch plate assembly section 3a and a lower pitch plate assembly section 3d, wherein the pitch plates are symmetrically arranged. Pitch plates of different thicknesses are stored in the pitch plate storage chamber. When the pitch plate assembly size is determined, the propulsion motor is used to push a given number of pitch plates into the pitch plate assembly section to achieve a combination of pitch plates of different sizes. The pitch plate has a specific structure, and its structure varies according to the thickness of the pitch plate. The basic structure of the pitch plate is T-shaped. While ensuring that it can be fixed in the slide, inclined slopes of different lengths are designed on its side according to its thickness to facilitate subsequent classification and recycling.

[0052] The cover module 5 utilizes support columns 5c to connect the upper and lower cover plates 5a and 5b. An upper cover plate slot 5d is located below the upper cover plate 5a, and a lower cover plate slot 5e is located above the lower cover plate 5b. The four support columns, fixed at fixed heights, provide support when the assembly module lacks a test cascade. Specific grooves in the upper and lower cover plates allow for interaction with the specially designed cascade assembly and pitch adjustment block. When the cascade assembly and pitch adjustment block are alternately pushed into the assembly module, the upper and lower cover plates are completely sealed.

[0053] A modular planar cascade test section assembly platform with adjustable pitch and angle proposes the following three-step solution for the test section assembly process: cascade angle adjustment solution, cascade pitch adjustment plate combination solution, and reciprocating loading solution.

[0054] first step,

[0055] 1. An adjustment mechanism consisting of a height adjustment platform, a large screw guide rail, a screw slider, a connecting plate, a connecting rod, a crank, a pin and a crank guide rail is designed;

[0056] 2. The blades are plug-in connected to the upper and lower stepped shafts, and the upper stepped shaft is plug-in connected to the lower end of the crank guide rail. The upper and lower stepped platforms are respectively provided with keyways that match the stepped shafts for plug-in connection. The long end of the crank drives the crank guide rail to rotate, and the crank slides along the crank guide rail.

[0057] 3. When the lead screw rotates, the slider drives the connecting rod, crank, crank guide rail and stepped shaft to rotate continuously, thus realizing the continuous rotation of the cascade;

[0058] 4. When the blade rotates to the target angle, the motor stops running and the base under the screw guide rail starts working, driving the connecting rod, crank, crank guide rail and stepped shaft to separate. The blade, stepped shaft and stepped platform are assembled as a whole and ready for the next work process.

[0059] Step 2: Pitch adjustment plan:

[0060] 1. Designed a pitch slider module consisting of a slider assembly section, a slider storage cavity, and a slider propulsion motor;

[0061] 2. The control system calculates the pitch plate combination scheme in each storage cavity, and the propulsion motor pushes the 1mm, 5mm and 10mm pitch plates in the pitch plate storage cavity into the combination section to realize the combination of the pitch plates.

[0062] Step 3: Reciprocating loading solution

[0063] 1. After completing the first and second steps, the lead screw guide drives the angle adjustment module and the grid spacing adjustment module to move horizontally and connect with the cover module composed of the cover, fixing bolts and support columns;

[0064] 2. When the spacer assembly section is aligned with the cover plate groove, the screw guide rail stops working, and the push rod device pushes the matched grid pitch spacer assembly into the cover plate groove to realize the filling of the grid pitch spacer;

[0065] 3. After the push rod device returns to its original position, the screw guide rail drives the angle adjustment module and the grid distance adjustment module to move horizontally and connect with the cover module;

[0066] 4. When the stepped platform is aligned with the cover plate groove, the screw guide rail stops working, and the push rod device pushes the blade group with completed angle adjustment into the cover plate groove to realize the cascade blade filling;

[0067] 5. During the reciprocating operation, assemble the second set of pitch adjusting pieces. After completion, repeat the third and fourth steps until all blades and pitch adjusting pieces are pushed into the cover plate grooves.

[0068] 6. Complete the assembly after the test bench stops working.

[0069] The specific plan is:

[0070] Step 1: Blade angle adjustment plan:

[0071] The structural design of the cascade angle adjustment module includes: Figure 3 The angle adjustment mechanism shown is composed of a height adjustment platform 2a, a large screw guide 2b, a screw slider 2c, a connecting plate 2d, a connecting rod 2e, a crank 2f, a pin 2g, and a crank guide 2h; and a blade grid assembly composed of a small screw guide 2i, a blade conveying slide 2j, an upper step platform 2k, a blade 2l, and a stepped shaft 2m.

[0072] Implementation of blade angle rotation: blade 2l is plug-in connected to upper step shaft 2o and lower step shaft 2m respectively; upper step shaft 2o is provided with a square keyway, which is plug-in connected to the lower end of crank guide rail 2h; upper step platform 2k and lower step platform 2n are provided with circular step keyways that can cooperate with upper step shaft 2o and lower step shaft 2m respectively for plug-in connection; the long end of L-shaped crank 2f passes through crank guide rail 2h, and can drive the crank guide rail to rotate, and crank 2f can slide along crank guide rail 2h; since the crank is thin and needs to be rotated frequently, in order to ensure its strength, reinforcing ribs are cast between the long handle and the short handle, and the short handle of L-shaped crank 2f is hinged to connecting rod 2e through pin 2g; connecting rod 2e is connected to lead screw slider 2c through connecting plate 2d. When the motor starts, the lead screw begins to rotate, and the slider moves left and right, successively driving the connecting rod 2e, the L-shaped crank 2f, the crank guide rail 2h, and the upper stepped shaft 2o, and finally realizing the continuous rotation of the blade.

[0073] The blade angle is fixed: when the blade grid rotates to the target angle, the motor stops running and the base under the screw guide starts working. By adjusting its height and orientation, it drives the connecting rod 2e, L-shaped crank 2f, crank guide 2h to separate from the upper step shaft 2o, and the blade 2l, upper step shaft 2o, lower step shaft 2m, upper step platform 2k, and lower step platform 2n are assembled as a whole and ready for the next working process.

[0074] Structural design of the grid spacing adjustment module: including Figure 4 The upper spacer assembly section 3a, the upper spacer storage cavity 3b, the upper propulsion motor 3c and the lower spacer assembly section 3d, the lower spacer storage cavity 3e, and the lower propulsion motor 3f shown in the figure constitute a grid pitch spacer module.

[0075] Implementation of the combination of grating pitch and distance adjustment piece: The control system gives the grating value accuracy of 1mm to calculate the combination of distance adjustment pieces in each storage cavity, and pushes the 1mm, 5mm and 10mm distance adjustment pieces in the distance adjustment piece storage cavity ( Figure 6 ) is pushed into the distance plate combination section to realize the combination of the distance plate.

[0076] Step 3: Reciprocating filling scheme:

[0077] S3.1 Filling of the grating spacer

[0078] The lead screw guide rail 6 drives the angle adjustment module 2 and the pitch adjustment module 3 to translate in the width direction of the basic platform. When the upper pitch adjustment piece assembly section 3a is aligned with the upper cover plate groove 5d and the lower pitch adjustment piece assembly section 3d is aligned with the lower cover plate groove 5e, the lead screw guide rail 6 stops working. The pitch lead screw guide rail 7 drives the pitch adjustment module 3 to translate in the length direction of the basic platform. When the pitch adjustment module 3 is in contact with the cover plate module 5, the pitch lead screw guide rail 7 stops working.

[0079] The push rod device 4 starts to operate, and the push rod pushes the matched grid pitch adjusting piece group into the cover plate slot to realize the filling of the grid pitch adjusting piece;

[0080] S3.2 Cascade filling

[0081] After the grating pitch adjusting piece is loaded, the push rod device 4 returns to its original position, and the screw guide rail 6 drives the angle adjustment module 2 and the grating pitch adjustment module 3 to translate in the width direction of the basic platform. When the upper step platform 2k is aligned with the upper cover plate groove 5d and the lower step platform 2n is aligned with the lower cover plate groove 5e, the screw guide rail 6 stops working; the angle adjustment module 2 is driven by the small screw guide rail 2i to translate in the length direction of the basic platform. When the blade conveying slide rail 2j is connected to the cover plate module 5, the small screw guide rail 2i stops working; the push rod device 4 starts to operate, and the push rod pushes the blade assembly that has completed the angle adjustment into the cover plate groove to realize the cascade piece loading;

[0082] S3.3 Reciprocating work:

[0083] Repeat the above steps until all blade components and pitch adjusters are pushed into the cover plate slots, the test bench stops working, and the assembly is completed.

Claims

1. A modular planar cascade experimental section assembly platform with adjustable grating pitch and angle, comprising a base platform (1), characterized in that: An angle adjustment module (2), a grid pitch adjustment module (3), a push rod device (4), a cover module (5) and a lead screw guide rail (6) are arranged on the basic platform (1); The cover module (5) is arranged at one end of the base platform (1), and the push rod device (4) is arranged at the corresponding other end; the angle adjustment module (2) performs movement adjustment in the length direction of the base platform through the small screw guide rail (2i), and the grid pitch adjustment module (3) performs movement adjustment in the length direction of the base platform through the grid pitch screw guide rail (7); the angle adjustment module (2) and the grid pitch adjustment module (3) perform movement adjustment in the width direction of the base platform through the screw guide rail (6); The angle adjustment module (2) includes a blade assembly and an adjustment assembly; the blade assembly adopts a blade (2l) whose lower end is connected to a lower step shaft (2m), and the lower step shaft (2m) is arranged in a circular step keyway of a lower step platform (2n); the upper end of the blade (21) is connected to an upper step shaft (2o), and the upper step shaft (2o) is arranged in a circular step keyway of an upper step platform (2k); the blade assembly is arranged on a blade conveying slide rail (2j); A large screw guide rail (2b) is provided on the height adjustment platform (2a) in the adjustment assembly, and a screw slider (2c) on the large screw guide rail (2b) is connected to a connecting rod (2e) via a connecting plate (2d); one end of an L-shaped crank (2f) is provided on the connecting rod (2e) via a pin (2g), and the other end passes through the crank guide rail (2h); the lower end of the crank guide rail (2h) is inserted into a keyway at the top end of the upper stepped shaft (2o); The propulsion motor in the pitch adjustment module (3) is used to push the pitch adjustment plate in the pitch adjustment plate storage cavity into the pitch adjustment plate assembly section; The pitch pad storage chamber stores pitch pads of different thicknesses. When the pitch pad combination size is determined, a given number of pitch pads are pushed into the pitch pad combination section by a propulsion motor to achieve a combination of pitch pads of different sizes. The cover plate module (5) comprises an upper cover plate (5a) and a lower cover plate (5b) connected by a support column (5c); an upper cover plate groove (5d) is provided below the upper cover plate (5a); and a lower cover plate groove (5e) is provided above the lower cover plate (5b).

2. The modular planar cascade experimental section assembly platform with adjustable pitch and angle according to claim 1, characterized in that: The distance adjusting piece assembly segment comprises an upper distance adjusting piece assembly segment (3a) and a lower distance adjusting piece assembly segment (3d), wherein the distance adjusting pieces are symmetrically arranged.

3. The modular planar cascade experimental section assembly platform with adjustable pitch and angle according to claim 1, characterized in that: The basic structure of the distance adjusting piece is T-shaped, and the distance adjusting pieces of different thicknesses are designed with inclined slopes of different lengths on their sides.

4. A method for assembling a modular planar cascade experimental section platform with adjustable pitch and angle according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1 Cascade Angle Adjustment S1.1 Blade angle rotation The motor starts, and the lead screw in the large lead screw guide rail (2b) starts to rotate, driving the lead screw slider (2c) to move left and right, and then driving the connecting rod (2e) to move left and right through the connecting plate (2d); the L-shaped crank (2f) drives the crank guide rail (2h) to rotate through one end of the crank guide rail (2h), and the L-shaped crank (2f) can slide along the crank guide rail (2h); The crank guide rail (2h) rotates, driving the upper step shaft (2o), the blade (2l) and the lower step shaft (2m) to rotate, thereby achieving the rotation of the blade angle; S1.2 Blade Angle Fixed When the blades rotate to the target angle, the motor stops running and the height adjustment platform (2a) starts working. By adjusting its height and orientation, the connecting rod (2e), the L-shaped crank (2f), the crank guide rail (2h) are driven to separate from the upper step shaft (2o). The blades (2l), the upper step shaft 2o, the lower step shaft (2m), the upper step platform 2k, and the lower step platform (2n) are assembled as a whole and are ready to proceed to the next working process. S2 grating adjustment Calculating the pitch plate combination scheme in each storage cavity according to the grid pitch value given by the control system, pushing the pitch plate (8) in the upper pitch plate storage cavity (3b) into the upper pitch plate combination section (3a) by the upper propulsion motor (3c), and pushing the pitch plate (8) in the lower pitch plate storage cavity (3e) into the lower pitch plate combination section (3b) by the lower propulsion motor (3f); S3 reciprocating loading S3.1 Filling of the grating spacer The lead screw guide rail (6) drives the angle adjustment module (2) and the grid pitch adjustment module (3) to perform translation in the width direction of the basic platform. When the upper distance adjustment piece assembly section (3a) is aligned with the upper cover plate groove (5d) and the lower distance adjustment piece assembly section (3d) is aligned with the lower cover plate groove (5e), ​​the lead screw guide rail (6) stops working. The grid pitch lead screw guide rail (7) drives the grid pitch adjustment module (3) to perform translation in the length direction of the basic platform. When the grid pitch adjustment module (3) is in contact with the cover plate module (5), the grid pitch lead screw guide rail (7) stops working. The push rod device (4) starts to operate, and the push rod pushes the matched grid pitch adjusting piece group into the cover plate slot to realize the filling of the grid pitch adjusting piece; S3.2 Cascade filling After the grating pitch adjusting piece is loaded, the push rod device (4) returns to its original position, and the lead screw guide rail (6) drives the angle adjustment module (2) and the grating pitch adjustment module (3) to perform translation in the width direction of the basic platform. When the upper step platform (2k) is aligned with the upper cover plate groove (5d) and the lower step platform (2n) is aligned with the lower cover plate groove (5e), ​​the lead screw guide rail (6) stops working; the angle adjustment module (2) is driven by the small lead screw guide rail (2i) to perform translation in the length direction of the basic platform. When the blade conveying slide rail (2j) is connected to the cover plate module (5), the small lead screw guide rail (2i) stops working; the push rod device (4) starts to operate, and the push rod pushes the blade assembly that has completed the angle adjustment into the cover plate groove to realize the grating piece loading; S3.3 Reciprocating work: Repeat the above steps until all blade components and pitch adjusters are pushed into the cover plate slots, the test bench stops working, and the assembly is completed.

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