Axial flow fan service life detection tool

Abstract

The utility model relates to the technical field of detection tools, in particular to an axial flow fan service life detection tool which comprises a horizontally-arranged mounting table and a detection assembly rotationally arranged above the mounting table, the detection assembly comprises two return pipes which are oppositely arranged, the return pipes are bent round pipes, the ends of the two return pipes are oppositely arranged, and the end portions of the two return pipes are oppositely arranged. One end of each backflow pipe is connected with a fan body, the other end of each backflow pipe is connected with a T-shaped pipe, the fan body is communicated with the two backflow pipes, the T-shaped pipe is in a T shape, the two ends, coinciding with the axis, of the T-shaped pipe are communicated with the two backflow pipes respectively, and the backflow pipes, the fan body and the T-shaped pipe form a backflow channel. And the effect of stably and efficiently detecting the axial flow fan is achieved.

Description

Technical Field

[0001] This application relates to the field of testing tooling technology, and in particular to a tooling for testing the lifespan of an axial flow fan. Background Technology

[0002] Currently, axial flow fans are auxiliary equipment used on helicopters to meet the needs of helicopters in terms of cooling, ventilation, and environmental control. In order to reduce the possibility of flight accidents caused by problems with axial flow fans during flight, axial flow fans need to undergo rigorous life testing during the development process to ensure the safety, reliability, and accurate service life of the axial flow fans.

[0003] Existing testing methods simulate a sand and dust environment by sending air containing sand and dust into the inlet of an axial flow fan, and then blowing the air containing sand and dust out from the outlet of the axial flow fan through the fan's flow channel. The service life of the axial flow fan is determined by the wear and tear caused by the sand and dust.

[0004] The existing technical solutions described above have the following drawbacks:

[0005] 1. High labor cost: During the test, staff need to continuously fill the blowing device with sand to ensure a simulated sand and dust environment. At the same time, the collection and cleaning of sand and dust is also a lot of work.

[0006] 2. High loss of test materials: A large amount of sand and dust that cannot be recovered will occur during the test, resulting in high loss of test materials. Utility Model Content

[0007] This application provides a tooling for testing the lifespan of axial flow fans in order to achieve stable and efficient testing.

[0008] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0009] A life testing fixture for an axial flow fan includes a horizontally mounted platform and a testing component rotatably mounted above the platform. The testing component includes two return pipes arranged opposite each other. The return pipes are curved circular pipes with their ends facing each other. One end of each return pipe is connected to the fan body, and the other end is connected to a T-shaped pipe. The fan body is connected to both return pipes. The T-shaped pipe has two ends with their axes coinciding, which are connected to the two return pipes respectively. The return pipes, the fan body, and the T-shaped pipe form a return channel.

[0010] By adopting the above technical solution, and by setting up an installation platform and a rotating detection component above it, the detection component includes two opposing curved return pipes. The two ends of the return pipes are connected to the fan body and a T-junction pipe, respectively. The fan body is connected to the two return pipes, and the T-junction pipe is connected to the return pipes. The return pipes, the fan body, and the T-junction pipe form a return channel, which can form a closed airflow circulation path. Sand is filled into the return channel through the T-junction pipe. When the fan body is started, the fan blades will generate airflow, causing the sand to circulate in the return channel. The sand is reused for wear detection, reducing the manual operation of continuously filling sand, reducing sand loss, and achieving stable and efficient axial flow fan life detection.

[0011] Optionally, a first support frame and a second support frame are spaced apart on the upper surface of the mounting platform. Both the first support frame and the second support frame are U-shaped with their openings facing the mounting platform. The detection component is disposed between the first support frame and the second support frame. Limiting components are provided on the surfaces of the first support frame and the second support frame away from the mounting platform via mounting plates. The axes of the two limiting components coincide. Fixing units are provided at positions on the outer peripheral walls of the return pipe that are far apart from each other. Rotating columns are coaxially rotatably disposed inside the limiting components. Rotating plates are provided at the opposite ends of the two rotating columns. The opposite surfaces of the rotating plates are respectively connected to the two fixing units.

[0012] By adopting the above technical solution, and by setting up a first support frame and a second support frame, the detection component is located between the two support frames. The support frames are separated from the surface of the mounting platform by a mounting plate with limiting members. The axes of the two limiting members coincide. A fixing unit is set on the outer peripheral wall of the return pipe. A rotating column is coaxially rotatable inside the limiting members. A rotating plate is set at the opposite end of the rotating column and connected to the fixing unit. This can provide support and a rotation fulcrum for the detection component, allowing the detection component to rotate between the support frames. By rotating, it can simulate different attitudes of a helicopter during flight, allowing the axial flow fan to be tested at multiple angles, thereby improving the authenticity and comprehensiveness of the test results.

[0013] Optionally, a fixing unit includes a first fixing member and a second fixing member. The first fixing member is connected to the plate surface of the rotating plate opposite to the rotating column. The second fixing member is connected to the first fixing member. The first fixing member and the second fixing member can form a complete cylinder. The first fixing member and the second fixing member can be sleeved on the peripheral wall of the return pipe. The ends of the first fixing member and the second fixing member on the same side of the two fixing units are connected by the same connecting rod.

[0014] By adopting the above technical solution, by setting a first fixing member and a second fixing member, the first fixing member is connected to the rotating plate, and the second fixing member is connected to the first fixing member. The two can form a cylinder that is sleeved on the circumferential wall of the return pipe. The ends of the first fixing member and the second fixing member on the same side of the two fixing units are connected by a connecting rod, which can stably fix the return pipe on the rotating plate and ensure that the return pipe will not loosen or fall off during the rotation of the detection component. At the same time, the connecting rod connects the fixing units on both sides, enhancing the integrity and stability of the fixing structure and ensuring the integrity of the return channel.

[0015] Optionally, a drive motor is provided on the upper surface of the mounting platform opposite to the second support frame of the first support frame. The output shaft of the drive motor faces the first support frame and is coaxially arranged with the rotating column. The end of the output shaft of the drive motor is coaxially connected to the end of the rotating column near the drive motor through a connecting shaft.

[0016] By adopting the above technical solution, and by setting up a drive motor with its output shaft coaxial with the rotating column and connected to the end of the rotating column via a connecting shaft, rotational power can be provided to the rotating column. When the drive motor is working, it drives the rotating column to rotate via the connecting shaft, thereby driving the entire detection component to rotate. This achieves automated simulation of different detection postures, reduces manual operation, and improves detection efficiency.

[0017] Optionally, a sealing cylinder is provided inside the end of the tee pipe that is separated from the return pipe. A flange is provided on the peripheral wall of the sealed end of the sealing cylinder, and the sealing cylinder is connected to the end of the tee pipe through the flange.

[0018] By adopting the above technical solution, and by setting up a closed cylinder with a flange on the closed end wall and connecting it to the end of the tee pipe, the opening of the return channel can be sealed, preventing sand from leaking from the end of the tee pipe during the testing process, ensuring that the sand circulates in the return channel, maintaining the stability of the testing environment, and avoiding the impact of sand leakage on the testing results.

[0019] Optionally, the closed end of the closed cylinder is coaxially provided with a circular groove, and a cross-shaped operating plate is provided in the circular groove. All four end faces of the operating plate are fixedly connected to the groove wall.

[0020] By adopting the above technical solution and setting up an operating panel, operators can easily install or disassemble the sealed cylinder. The cross-shaped operating panel can apply torque to easily tighten or loosen the flange connection between the sealed cylinder and the tee pipe, which facilitates filling sand before testing or cleaning the return channel after testing, thus improving the convenience of tooling use.

[0021] Optionally, the outer peripheral walls of the reflux pipe end are fitted with matching reinforcement members on both opposite sides, and the ends of the reinforcement members on the same side are connected by a reinforcing rod.

[0022] By adopting the above technical solution, and by setting up reinforcement components and reinforcing rods, the ends of the reinforcement components on both sides are connected by reinforcing rods, which can enhance the structural strength of the connection between the return pipe and the fan body and the T-pipe, reduce the possibility of loosening or breaking of the return pipe connection due to vibration caused by airflow impact and rotation during the testing process, and ensure the sealing and stability of the return channel.

[0023] Optionally, the second support frame has a rotating bearing spaced apart from the mounting platform surface and the limiting member. The rotating bearing is sleeved on the peripheral wall of the rotating column and is coaxial with the rotating column.

[0024] By adopting the above technical solution and setting a rotating bearing, which is sleeved on the circumferential wall of the rotating column and coaxial, the rotating column can be assisted to rotate more smoothly, reducing the frictional resistance between the rotating column and the limiting component, making the detection component rotate more smoothly, reducing the wear of rotating parts, and extending the service life of the tooling.

[0025] Optionally, the rotating column peripheral wall near the rotating plate end has four reinforcing plates distributed in a cross shape, the surface of the reinforcing plates is perpendicular to the surface of the rotating plate, and the adjacent side walls of the reinforcing plates are fixed to the peripheral wall of the rotating column and the surface of the rotating plate, respectively.

[0026] By adopting the above technical solution and setting a reinforcing plate, the connection strength between the rotating column and the rotating plate can be enhanced, the stability of the rotating structure can be improved, and the cracking or detachment of the connection between the rotating column and the rotating plate due to the centrifugal force when the detection component rotates can be avoided, thus ensuring the reliability of the rotating components during the detection process.

[0027] In summary, this application has the following technical effects:

[0028] 1. By setting up an installation platform and a rotating detection component above it, the detection component includes two opposing curved return pipes. The two ends of the return pipes are connected to the fan body and the tee pipe respectively. The fan body is connected to the two return pipes, and the tee pipe is connected to the return pipes. The return pipes, the fan body, and the tee pipe form a return channel, which can form a closed airflow circulation path. Sand is filled into the return channel through the tee pipe. When the fan body is started, the fan blades will generate airflow, causing the sand to circulate in the return channel. The sand is reused for wear detection, reducing the manual operation of continuously filling sand, reducing sand loss, and achieving stable and efficient axial flow fan life detection.

[0029] 2. By setting up a first support frame and a second support frame, the detection component is located between the two support frames. The support frames are separated from the surface of the mounting platform and are equipped with limiting components through the mounting plate. The axes of the two limiting components are coincident. A fixing unit is set on the outer peripheral wall of the return pipe. A rotating column is coaxially rotatable inside the limiting component. A rotating plate is set at the opposite end of the rotating column and connected to the fixing unit. This can provide support and rotation fulcrum for the detection component, allowing the detection component to rotate between the support frames. By rotating, it can simulate different attitudes of a helicopter during flight, allowing the axial flow fan to be tested at multiple angles, thereby improving the authenticity and comprehensiveness of the test results.

[0030] 3. By setting a first fixing component and a second fixing component, the first fixing component is connected to the rotating plate, and the second fixing component is connected to the first fixing component. The two can form a cylinder that is sleeved on the circumferential wall of the return pipe. The ends of the first fixing component and the second fixing component of the two fixing units are connected by a connecting rod, which can stably fix the return pipe on the rotating plate and ensure that the return pipe will not loosen or fall off during the rotation of the detection component. At the same time, the connecting rod connects the fixing units on both sides, enhancing the integrity and stability of the fixing structure and ensuring the integrity of the return channel. Attached Figure Description

[0031] Figure 1 This is a structural diagram of the external shape of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Base; 11. Mounting platform; 111. First support frame; 112. Second support frame; 113. Mounting plate; 12. Limiting component; 13. Rotating component; 131. Rotating column; 132. Rotating plate; 14. Rotating bearing; 15. Drive motor; 16. Connecting shaft; 2. Detection assembly; 21. First fixing component; 22. Second fixing component; 23. Connecting rod; 24. Return pipe; 25. Fan body; 26. T-shaped pipe; 261. Enclosed cylinder; 262. Operation panel; 27. Reinforcing component; 271. Reinforcing rod; 28. Fixing plate. Detailed Implementation

[0033] The present application will be further described in detail below with reference to the accompanying drawings.

[0034] This application discloses a tooling for testing the lifespan of an axial flow fan, referring to... Figure 1 The testing fixture includes a base 1 and a testing component 2 set on the base 1. The testing component 2 can simulate the environment when the axial flow fan is in the air and perform life testing on the axial flow fan, making the test data more realistic. At the same time, it can reuse the sand used for testing, eliminating the need for staff to continuously fill the sand, saving labor, reducing sand consumption, and making the life testing of the axial flow fan more convenient and efficient.

[0035] Reference Figure 1The base 1 includes a horizontally arranged mounting platform 11. A first support frame 111 and a second support frame 112 are spaced apart on the upper surface of the mounting platform 11. Both the first support frame 111 and the second support frame 112 are U-shaped frames composed of multiple square rods. The U-shaped openings of both the first support frame 111 and the second support frame 112 face the upper surface of the mounting platform 11. The left and right sidewalls of the outer surfaces of the first support frame 111 and the second support frame 112 are flush with the sidewalls of the mounting platform 11, respectively. The second support frame 112 is located near one end of the mounting platform 11. A mounting plate 113 is provided on the outer surface of both the first support frame 111 and the second support frame 112 away from the mounting platform 11. The mounting plate 113 is a square plate, and its surface is parallel to the upper surface of the mounting platform 11.

[0036] Reference Figure 1 A detection component 2 is rotatably mounted between the first support frame 111 and the second support frame 112 via a rotating member 13. A limiting member 12 is provided on the surface of the mounting plate 113 facing away from the mounting platform 11. The limiting member 12 consists of a cylinder and a strip plate whose surface is fixed to the side wall of the cylinder. The length direction of the strip plate of the limiting member 12 is perpendicular to the axis of the cylinder of the limiting member 12, and the axis of the cylinder of the limiting member 12 is parallel to the length direction of the mounting platform 11. The rotating member 13 consists of a rotating column 131 and a rotating plate 132. The rotating member 13 is T-shaped. The rotating column 131 is a cylinder, and the rotating plate 132 is a metal strip plate. The end face of the rotating column 131 is fixed to the surface of the rotating plate 132. The rotating column 131 is adapted to the inner wall of the cylinder of the limiting member 12, and the rotating column 131 can be rotatably mounted in the cylinder of the limiting member 12.

[0037] Reference Figure 1 Four reinforcing plates, each a triangular metal plate, are arranged in a cross shape near the end of the rotating column 131 close to the rotating plate 132. One side wall of each reinforcing plate is fixed to the peripheral wall of the rotating column 131, and the other side wall is fixed to the surface of the rotating plate 132. The reinforcing plates are welded in a cross shape along the circumference of the rotating column 131, with two extending along the surface of the rotating plate 132 and the other two perpendicular to the surface. These reinforcing plates enhance the connection between the rotating column 131 and the rotating plate 132. The surfaces of the two rotating plates 132 between the two limiting members 12 are positioned opposite each other.

[0038] Reference Figure 1A rotating bearing 14 is provided on the mounting plate 113 away from the mounting platform 11. The rotating bearing 14 is located on the side of the mounting plate 113 away from the second support frame 112. The rotating bearing 14 is sleeved on the peripheral wall of the rotating column 131 and is spaced apart from the limiting member 12. The rotating bearing 14 can assist the rotating column 131 to rotate more smoothly. A drive motor 15 is provided on the upper surface of the mounting platform 11. The drive motor 15 is located on the side of the first support frame 111 away from the second support frame 112. The drive motor 15 is spaced apart from the first support frame 111. The output shaft of the drive motor 15 faces the first support frame 111. The axis of the output shaft of the drive motor 15 coincides with the axis of the rotating column 131. The end of the output shaft of the drive motor 15 is connected to the end of the rotating column 131 near the drive motor 15 through a connecting shaft 16. The connecting shaft 16 is coaxial with the output shaft of the drive motor 15 and the rotating column 131.

[0039] Reference Figure 1 The detection component 2 includes two first fixing members 21 connected to the rotating plate 132 away from the rotating column 131, two second fixing members 22 disposed on the side of the first fixing member 21 away from the rotating column 131, two return pipes 24 disposed between the first fixing member 21 and the second fixing member 22, and a fan body 25 and a three-way pipe 26 disposed between the two return pipes 24. One first fixing member 21 and one second fixing member 22 form a fixing unit. A fixing unit is disposed on each of the two opposing rotating plates 132. The first fixing member 21 is composed of a strip plate and a semi-cylinder fixed to the surface of the strip plate. The surface of the strip plate of the first fixing member 21 is consistent with the surface of the rotating plate 132. The strip plate of the first fixing member 21 can be connected to the rotating plate 132 by bolts. The arc opening of the inner wall of the semi-cylinder of the first fixing member 21 is away from the rotating plate 132. The second fixing member 22 is a semi-cylinder. The second fixing member 22 can form a complete cylinder with the semi-cylinder of the first fixing member 21.

[0040] Reference Figure 1 The first fixing member 21 (semi-cylindrical) and the second fixing member 22 both have thickened portions at their outer wall ends. Multiple thickened portions on the fixing unit side of the two rotating plates 132 are connected by a connecting rod 23. The length of the connecting rod 23 is parallel to the axis of the rotating column 131. The connecting rod 23 is threadedly connected to the thickened portions at the outer wall ends of the first fixing member 21 (semi-cylindrical) and the second fixing member 22. The return pipe 24 is semi-circular, with its ends facing each other. The return pipe 24 is clamped and fixed by the first fixing member 21 and the second fixing member 22.

[0041] Reference Figure 1The two return pipes 24 are connected to the fan body 25 via flanges on one side, and to the tee pipe 26 via flanges on the other side. The two return pipes 24, the fan body 25, and the tee pipe 26 form a complete return channel. Sand is filled into the return channel through the tee pipe 26. After the fan body 25 starts, the rotating blades generate airflow, causing the sand in the return channel to circulate along the tee pipe 26, return pipe 24, fan body 25, and tee pipe 26, allowing the sand to be reused for life testing of the fan. This eliminates the need for continuous sand filling by personnel, saving labor. The connecting rod 23 connects the two fixed units between the two rotating plates 132, enabling them to rotate synchronously. Driven by the drive motor 15, it simulates various attitudes of a helicopter in flight, making the test results more realistic.

[0042] Reference Figure 1 The tee pipe 26 is T-shaped. Its two ends, coinciding with each other's axes, are connected to the ends of two return pipes 24 via flanges. A sealing cylinder 261 is installed inside the other end of the tee pipe 26. The sealing cylinder 261 is cylindrical, with its outer circumferential wall fitting flush with the inner wall of the end of the tee pipe 26. The sealing cylinder 261 effectively seals the return channel, reducing the possibility of sand escaping from it. The closed end of the sealing cylinder 261 is flush with the end of the tee pipe 26, and a flange is installed on its circumferential wall. The sealing cylinder 261 is connected to the tee pipe 26 via the flange. A circular groove is coaxially formed at the closed end of the sealing cylinder 261, and a cross-shaped operating plate 262 is installed within the groove. The four end faces of the operating plate 262 are fixed to the groove wall, facilitating the installation and removal of the sealing cylinder 261.

[0043] Reference Figure 1 The two ends of the return pipe 24 are provided with reinforcing members 27 on their opposite peripheral walls. The reinforcing members 27 are strip plates adapted to the peripheral walls of the return pipe 24. The two fixing members are arranged opposite each other and connected on the same side by a reinforcing rod 271. The reinforcing rod 271 is threaded to the end of the reinforcing member 27. The reinforcing members 27 and the reinforcing rod 271 can reinforce the connection between the return pipe 24 and the fan body 25 and the tee pipe 26, reducing the possibility of the return pipe 24 separating from the fan body 25 and the tee pipe 26 during the testing process.

[0044] Reference Figure 1The reinforcing rod 271 and the connecting rod 23 are spaced apart. The length direction of the reinforcing rod 271 is perpendicular to the length direction of the connecting rod 23. Two fixing plates 28 are provided inside a return pipe 24, with their surfaces facing each other. The two reinforcing rods 271 at both ends of the fixing component pass through the same fixing plate 28. The axis of the reinforcing rod 271 is perpendicular to the surface of the fixing plate 28, and the length direction of the fixing plate 28 is perpendicular to both the axis of the connecting rod 23 and the axis of the reinforcing rod 271. Arc-shaped grooves are provided at corresponding positions on the opposing surfaces of the two fixing plates 28. These grooves are adapted to the connecting rod 23. The two fixing plates 28 are fixed together by bolts, with their opposing surfaces abutting against each other. The fixing plates 28 are fitted onto the periphery of the connecting rod 23 through their arc-shaped grooves. The fixing plates 28 connect the reinforcing rod 271 and the connecting rod 23, enhancing the strength of the detection component 2 and reducing the possibility of dispersion during rotation.

[0045] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A tooling for testing the lifespan of an axial flow fan, characterized in that: The device includes a horizontally mounted mounting platform (11) and a detection assembly (2) rotatably mounted above the mounting platform (11). The detection assembly (2) includes two return pipes (24) arranged opposite each other. The return pipes (24) are curved round pipes with their ends facing each other. One end of the return pipe (24) is connected to the fan body (25), and the other end of the return pipe (24) is connected to a T-shaped pipe (26). The fan body (25) is connected to both return pipes (24). The T-shaped pipe (26) is T-shaped, and the two ends of the T-shaped pipe (26) whose axes coincide are connected to the two return pipes (24) respectively. The return pipes (24), the fan body (25), and the T-shaped pipe (26) form a return channel.

2. The axial flow fan life testing fixture according to claim 1, characterized in that: The mounting platform (11) is provided with a first support frame (111) and a second support frame (112) at intervals on its upper surface. Both the first support frame (111) and the second support frame (112) are U-shaped and their openings face the mounting platform (11). The detection component (2) is located between the first support frame (111) and the second support frame (112). The surfaces of the first support frame (111) and the second support frame (112) facing away from the mounting platform (11) are provided with limiting members (12) through the mounting plate (113). The axes of the two limiting members (12) coincide. Fixed units are provided at positions on the outer periphery of the return pipe (24) that are far apart from each other. A rotating column (131) is coaxially rotatably provided inside the limiting member (12). A rotating plate (132) is provided at the opposite ends of the two rotating columns (131). The opposite surfaces of the rotating plates (132) are respectively connected to the two fixed units.

3. The axial flow fan life testing fixture according to claim 2, characterized in that: A fixing unit includes a first fixing member (21) and a second fixing member (22). The first fixing member (21) is connected to the rotating plate (132) away from the rotating column (131). The second fixing member (22) is connected to the first fixing member (21). The first fixing member (21) and the second fixing member (22) can form a complete cylinder. The first fixing member (21) and the second fixing member (22) can be sleeved on the peripheral wall of the return pipe (24). The ends of the first fixing member (21) and the second fixing member (22) on the same side of the two fixing units are connected by the same connecting rod (23).

4. The axial flow fan life testing fixture according to claim 2, characterized in that: A drive motor (15) is provided on the upper surface of the mounting platform (11) of the first support frame (111) away from the second support frame (112). The output shaft of the drive motor (15) faces the first support frame (111) and is coaxially arranged with the rotating column (131). The end of the output shaft of the drive motor (15) is coaxially connected to the end of the rotating column (131) near the drive motor (15) through a connecting shaft (16).

5. The axial flow fan life testing fixture according to claim 1, characterized in that: A sealing cylinder (261) is provided inside the end of the tee pipe (26) that is separated from the return pipe (24). A flange is provided on the peripheral wall of the sealed end of the sealing cylinder (261). The sealing cylinder (261) is connected to the end of the tee pipe (26) through the flange.

6. The axial flow fan life testing fixture according to claim 5, characterized in that: The closed end of the closed cylinder (261) is coaxially provided with a circular groove, and a cross-shaped operating plate (262) is provided in the circular groove. The four end faces of the operating plate (262) are all fixedly connected to the groove wall.

7. The axial flow fan life testing fixture according to claim 1, characterized in that: The outer peripheral wall of the return pipe (24) is fitted with a matching reinforcement (27) on both sides opposite to it, and the ends of the reinforcement (27) on both sides are connected by a reinforcement rod (271).

8. The axial flow fan life testing fixture according to claim 2, characterized in that: The second support frame (112) has a rotating bearing (14) spaced apart from the surface of the mounting platform (11) and the limiting member (12). The rotating bearing (14) is sleeved on the circumferential wall of the rotating column (131) and is coaxial with the rotating column (131).

9. The axial flow fan life testing fixture according to claim 2, characterized in that: The rotating column (131) has four reinforcing plates arranged in a cross shape near the end of the rotating plate (132). The surface of the reinforcing plates is perpendicular to the surface of the rotating plate (132). The two adjacent side walls of the reinforcing plates are fixed to the peripheral wall of the rotating column (131) and the surface of the rotating plate (132), respectively.

Images