A connecting mechanism for a test stand measurement assembly and a method of assembling the same

Abstract

The application discloses a connecting mechanism for a test-bed measuring assembly and an assembling method thereof. The connecting mechanism comprises two oppositely arranged connecting plates, the two connecting plates are connected through a plurality of screw rods, and the two connecting plates are connected with sensors and flexible pieces respectively. The connecting mechanism can bear the tension and pressure transmitted by the screw thread connecting structure, and is stable and reliable in connection. The connecting mechanism is simple in structure, convenient to install and disassemble, and convenient to debug.

Description

Technical Field

[0001] This invention belongs to the technical field of aero-engine testing equipment, and particularly relates to a connection mechanism for a test bench measurement component. Background Technology

[0002] In aero-engine test rigs, the measurement assembly, serving as the structure for measuring engine thrust, is mounted on either side of the engine's centerline. Early measurement assemblies employed a "sandwich" structure: a flexible element-sensor-flexible element. This structure was simple, reliable, and provided accurate force measurement. However, as usage requirements evolved, the ease of sensor installation and removal became crucial. Therefore, a connection mechanism was needed between the sensor and the flexible element for sensor installation and removal. This connection mechanism needed to possess the following characteristics:

[0003] (1) Capable of withstanding large loads. Based on the engine thrust level and strength safety factor, the connecting mechanism must withstand at least 20t of tensile and compressive forces;

[0004] (2) Reasonable structure. On the basis of being able to withstand tensile and compressive forces, it is necessary to ensure that the force transmission path of the connecting mechanism is reasonable and the deformation under stress is small.

[0005] (3) Simple structure. According to current usage requirements, the sensor needs to be frequently disassembled and assembled. Therefore, the connection mechanism should be easy to disassemble and assemble and convenient to debug. At the same time, the space on the test bench is limited and the length of the measuring components is limited. The connection mechanism should be as short as possible. Under normal working conditions, the length of the connection structure is about 100mm.

[0006] Existing measurement components cannot assemble or disassemble sensors due to the lack of a connecting mechanism. While some existing connecting mechanisms can assemble and disassemble sensors, they are complex in structure and cumbersome to debug, making it impossible to upgrade or optimize the original structure. Therefore, a completely new structural form is needed to replace the existing one. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a connection mechanism for a test bench measurement component.

[0008] Invention Technology Solutions

[0009] A connection mechanism for a test bench measurement component includes two oppositely arranged connection plates connected by a plurality of screws, and the two connection plates are respectively connected to a sensor and a flexible component.

[0010] Preferably, the two connecting plates are provided with square holes for the screw to pass through, and the screw has a square boss that matches the square hole.

[0011] Preferably, a stop block is connected to the connecting plate, and the stop block is provided with a stop block adjusting bolt for pressing the square boss.

[0012] Preferably, the stop adjustment bolt is threaded onto the stop and can press against the side of the square boss.

[0013] Preferably, the two connecting plates are threadedly connected to the sensor and the flexible component, respectively.

[0014] Preferably, the screw is locked to the two connecting plates by a nut.

[0015] Preferably, the distance between the two connecting plates should be greater than the thickness of the sensor.

[0016] Preferably, after three-dimensional modeling, the strength of the connection structure is calculated, and the structure is optimized based on the maximum deformation in the calculation results to ensure that the overall deformation of the connection structure is as small as possible; the material of each component in the connection structure is determined based on the maximum stress value in the calculation results.

[0017] Preferably, the connecting plate and screw are made of 40Cr.

[0018] An assembly method for a connection mechanism of a test bench measurement component is provided. During installation, one side of the connection plate is connected to the sensor. When installing the other side of the connection plate, a reference shaft is inserted into the square hole of the already installed connection plate. When the square hole at the corresponding position on the other side of the connection plate matches the reference shaft, the two connection plates are considered to be aligned. The nuts on the connection plates are then tightened, and the flexible component is connected to the other side of the connection plate. After the connection plates are installed on the sensor and the flexible component respectively, the reference shaft is removed. Then, the screw is installed on the two connection plates, and then the stop block is fixed on the connection plate. Finally, the square boss is tightened with the stop block adjusting bolt.

[0019] Advantages of this invention:

[0020] (1) It can withstand the tension and pressure transmitted from the threaded connection structure, and the connection is stable and reliable.

[0021] (2) The structure is simple, easy to install and disassemble, and easy to debug.

[0022] (3) Applied to specific working areas with threaded connections at both ends and a small space in the middle (about 100mm in length), it can more accurately meet the needs of specific work.

[0023] (4) Compared with traditional threaded connections, pin connections and wedge connections, the structure of the present invention is more stable and easier to disassemble. Compared with pin connections, the connection force is greater and it is not easy to loosen. Compared with wedge connections, it is easier to disassemble, assemble and debug.

[0024] Therefore, this invention has higher practicality and economy compared to the prior art, and can be widely applied in the fields of connection devices, mechanical engineering and automotive engineering, and has great market potential. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a connection mechanism for a test bench measurement component according to the present invention.

[0026] Figure 2 This is a schematic diagram of the connecting plate structure in the embodiment.

[0027] Figure 3 This is a side view of the structural working state of a connection mechanism for a test bench measurement component according to the present invention.

[0028] Figure 4 This is an assembly diagram of the connecting plate.

[0029] In the diagram, 1-sensor, 2-stop block, 3-stop block adjusting bolt, 4-connecting plate, 5-flexible component, 6-screw, 7-nut, 8-reference shaft. Detailed Implementation

[0030] The present invention is achieved through the following technical solution.

[0031] A connection mechanism for a test bench measurement component includes two connecting plates 4 arranged parallel to each other. Several screws 6 pass through the two connecting plates 4 to connect them; in this embodiment, four screws 6 are used. Square holes for the screws 6 to pass through are provided at corresponding positions on the two connecting plates 4. Each screw 6 has a square boss that matches the shape of the square hole and has a clearance fit. A stop block 2 is fixed to the side of the connecting plate 4 by a stop block fixing bolt. A stop block adjusting bolt 3 passes through the rear end face of the stop block 2 and presses against the side of the square boss. The stop block adjusting bolt 3 is threadedly connected to the stop block. Each screw 6 is provided with a stop block adjusting bolt 3 for pressing against the square boss. Each screw 6 has three nuts, two of which are located on both sides of one connecting plate 4, and the other nut and the large end of the screw 6 are located on both sides of the other connecting plate 4, fixing the screw 6 to the connecting plate 4. The stop block 2 prevents the direction of force from shifting during force transmission. Pressing the square boss of the screw 6 with the stop block adjusting bolt 3 ensures the overall structure is stable and reliable.

[0032] The two connecting plates 4 are threadedly connected to the sensor 1 and the flexible component 5, respectively. The connecting plates 4 have interfaces for connecting to the sensor 1 and the flexible component 5; these interfaces can be internal or external threads. Figure 1 The external threaded interface shown is one of the forms. In this embodiment, the flexible member 5 is threadedly connected to the connecting plate 4 and then locked by the lock nut 7.

[0033] Since the connecting mechanism requires the sensor to be disassembled, the thickness of the connecting plate 4 depends on the distance between the flexible part 5 and the sensor 1. The distance between the two connecting plates 4 must be greater than the thickness of the sensor 1 so that when disassembling, after removing the connecting plate 4 on one side of the sensor 1, there is space to remove the sensor 1.

[0034] After 3D modeling, the strength of the connection structure is calculated. The structure is optimized based on the maximum deformation in the calculation results to ensure that the overall deformation of the connection structure is as small as possible. The material of the connection structure is determined based on the maximum stress value in the calculation results: 40Cr is selected for the connection plate and screw, 45 steel is selected for the stop block, 12.9 grade bolts are selected for the bolts and nuts, and anti-loosening washers are selected for the washers.

[0035] During installation, after installing the anti-loosening washer on one side of the connecting plate 4, connect it to the sensor 1. When installing the other side of the connecting plate 4, insert the reference shaft 8 into the already installed connecting plate 4. When the square hole at the corresponding position on the other side of the connecting plate 4 matches the reference shaft 8, the two connecting plates 4 are considered to be aligned. Tighten the nut 7 on the connecting plate 4, and the flexible part 5 is connected to the other side of the connecting plate 4. After the connecting plates 4 are aligned, remove the reference shaft 8, then install the screw 6 on the two connecting plates 4 and tighten it with the nut. Then fix the stop 2 on the connecting plate 4, and finally use the stop adjusting bolt 3 to press the square boss.

[0036] The scope of protection of this invention is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its scope. If such modifications and variations fall within the scope of the claims of this invention and their equivalents, then the intent of this invention also includes these modifications and variations.

Claims

1. A connection mechanism for a test bench measurement assembly, characterized in that, It includes two oppositely arranged connecting plates (4), which are connected by several screws (6). The two connecting plates (4) are respectively connected to the sensor (1) and the flexible part (5). The two connecting plates (4) are provided with square holes for the screws (6) to pass through. The screws (6) have square bosses that cooperate with the square holes. A stop block (2) is connected to the connecting plate (4). The stop block (2) is provided with a stop block adjusting bolt (3) for pressing the square boss. The stop block adjusting bolt (3) is threaded on the stop block (2) and can press the side of the square boss.

2. The connection mechanism for a test bench measurement assembly as described in claim 1, characterized in that, The two connecting plates (4) are threadedly connected to the sensor (1) and the flexible part (5) respectively.

3. The connection mechanism for a test bench measurement assembly as described in claim 1, characterized in that, The screw (6) is locked to the two connecting plates (4) by nuts.

4. The connection mechanism for a test bench measurement assembly as described in claim 1, characterized in that, The distance between the two connecting plates (4) must be greater than the thickness of the sensor (1).

5. The connection mechanism for a test bench measurement assembly as described in claim 1, characterized in that, After 3D modeling, the strength of the connection structure is calculated, and the structure is optimized based on the maximum deformation in the calculation results to ensure that the overall deformation of the connection structure is as small as possible. The materials of each component in the connection structure are determined based on the maximum stress value in the calculation results.

6. The connection mechanism for a test bench measurement assembly as described in claim 5, characterized in that, The connecting plate (4) and screw (6) are made of 40Cr.

7. An assembly method for a connection mechanism for a test bench measurement component as described in claim 1, characterized in that, During installation, connect one side of the connecting plate (4) to the sensor (1). When installing the other side of the connecting plate (4), insert the reference shaft (8) into the square hole of the already installed connecting plate (4). When the square hole at the corresponding position on the other side of the connecting plate (4) matches the reference shaft (8), it is considered that the two connecting plates (4) are aligned. Connect the flexible part (5) to the other side of the connecting plate (4). After the connecting plates (4) are installed on the sensor and the flexible part respectively, remove the reference shaft (8), then install the screw (6) on the two connecting plates (4), then fix the stop (2) on the connecting plate (4), and finally use the stop adjusting bolt (3) to press the square boss.

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