A displacement detection experiment platform under excitation pressure

Abstract

The utility model relates to displacement detection experiment platform under the excitation pressure, include: support base, the column support is fixed on the support base, set up the connecting plate on the column support, the pressure device sets up on the column support for providing stable thrust, the exciter is connected with the connecting plate through the fixed support, the main shaft of exciter top is connected with the output of pressure device, is used for receiving the thrust of pressure device and will it convert into dynamic amplitude, the pressing block is connected with the lower end of exciter, is used for bearing the measured object, the displacement detection device sets up on the support base, is used for providing displacement measurement datum, the displacement measurement head is installed on the pressing block, cooperates with displacement detection device, is used for detecting the displacement change of measured object. The utility model adds the exciter and applies certain frequency dynamic load under the pressure device push rod, realizes the superposition of static pressure and dynamic amplitude, truly simulates the vibration environment under the complex working condition, has improved the applicability and diversity of displacement experiment platform greatly.

Description

Technical Field

[0001] This utility model relates to the field of displacement detection technology, and in particular to a displacement detection experimental platform under excitation pressure. Background Technology

[0002] In fields such as materials performance testing and mechanical structure analysis, experimental platforms are crucial tools for studying the behavior of objects under different loads. Traditional experimental platforms are mostly static testing platforms, which primarily rely on applying constant static pressure, combined with strain gauge force sensors and data displays, to read the force on the object under test. However, with the continuous advancement of science and technology, the requirements for the precision and functionality of experimental equipment are becoming increasingly stringent, and existing technologies are gradually revealing some shortcomings:

[0003] Limited functionality: Traditional static testing platforms can only provide constant static pressure and cannot simulate dynamic loads under real working conditions, which limits the diversity and applicability of experiments.

[0004] Limited accuracy: Traditional displacement detection devices, such as inductive displacement sensors, have low resolution accuracy, poor repeatability due to long-term operation, and high cost.

[0005] Insufficient vibration simulation: The common way for exciters to operate is to use a fixed base for external excitation, which cannot be superimposed with other forces at the same stress position, making it difficult to realistically simulate the vibration environment under complex working conditions.

[0006] These shortcomings of existing technologies often prevent traditional experimental platforms from meeting the demands of experiments requiring high precision, multifunctionality, and realistic simulation of working conditions. Therefore, a new experimental platform is needed to overcome these limitations and provide higher precision, richer functionality, and an experimental environment closer to real-world conditions. Utility Model Content

[0007] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a displacement detection experimental platform under excitation pressure. By realizing the superposition of static pressure and dynamic amplitude, it can realistically simulate the vibration environment under complex working conditions and detect the variable relationship of the minute displacement or deformation of the measured object under pressure and excitation changes. This solves the problems of low accuracy, single function and inability to simulate real working condition vibration of the existing experimental platform.

[0008] To solve the above-mentioned technical problems, this utility model provides a displacement detection experimental platform under excitation pressure, comprising:

[0009] Support base;

[0010] A column bracket is fixed to the support base; a connecting plate is provided on the column bracket;

[0011] A pressure-applying device, mounted on the column support, is used to provide a stable thrust;

[0012] The vibrator is connected to the connecting plate via a fixed bracket. The main shaft at the top of the vibrator is connected to the output end of the pressure application device to receive the thrust of the pressure application device and convert it into dynamic amplitude.

[0013] The pressure block is connected to the lower end of the vibrator and is used to support the object being tested;

[0014] A displacement detection device is mounted on the support base to provide a displacement measurement reference.

[0015] The displacement measuring head is installed on the pressure block and works in conjunction with the displacement detection device to detect the displacement change of the object being measured.

[0016] In one embodiment of the present invention, the pressure applying device includes a cylinder, a push rod, and a connecting base plate. The telescopic end of the cylinder is connected to one end of the push rod, and the other end of the push rod is connected to the top of the vibrator through the connecting base plate.

[0017] In one embodiment of this utility model, the displacement detection device is a grating ruler.

[0018] In one embodiment of this utility model, the grating ruler is vertically mounted on the support base via a fixed base.

[0019] In one embodiment of this utility model, the displacement measuring head is a grating reading head.

[0020] In one embodiment of this utility model, an adjustment seat is provided between the grating reading head and the pressure block, and the adjustment seat is provided with mounting and fixing holes.

[0021] In one embodiment of this utility model, a jack module is provided on the support base below the vibrator.

[0022] In one embodiment of this utility model, a dynamic force sensor is provided between the vibrator and the pressure block to measure the combined force of the static pressure of the pressure application device and the dynamic amplitude of the vibrator.

[0023] In one embodiment of this utility model, the dynamic force sensor is installed between the vibrator and the pressure block via a threaded connection assembly.

[0024] In one embodiment of the present invention, the threaded connection assembly includes a connecting rod and a connecting seat, both of which are provided with threaded connection portions.

[0025] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0026] The displacement detection experimental platform under excitation pressure described in this utility model applies a dynamic load of a certain frequency by adding an exciter under the push rod of the pressure device, thereby realizing the superposition of static pressure and dynamic amplitude, and thus realistically simulating the vibration environment under complex working conditions. This functional expansion enables the experimental platform to not only conduct static experiments, but also dynamic experiments, greatly improving the applicability and versatility of the experimental platform. Attached Figure Description

[0027] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the displacement detection experimental platform under excitation pressure in a preferred embodiment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the displacement detection experimental platform under excitation pressure from another angle;

[0030] Figure 3 This is a schematic diagram of the pressure block, displacement detection device, and displacement measuring head of this utility model.

[0031] Figure 4 This is a schematic diagram of the dynamic force sensor and threaded connection assembly of this utility model;

[0032] Explanation of reference numerals in the accompanying drawings: 1. Support base; 2. Column bracket; 3. Connecting plate; 4. Pressing device; 41. Cylinder; 42. Push rod; 43. Connecting base plate; 5. Vibrator; 6. Fixed bracket; 7. Pressure block; 8. Displacement detection device; 9. Displacement measuring head; 10. Adjusting seat; 11. Mounting and fixing hole; 12. Jack module; 13. Dynamic force sensor; 14. Threaded connection assembly; 141. Connecting rod; 142. Connecting seat; 15. Fixed base. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0034] Reference Figure 1-3 As shown, the present invention provides a displacement detection experimental platform under excitation pressure, comprising:

[0035] Support base 1;

[0036] The column bracket 2 is fixed to the support base 1; the column bracket 2 is provided with a connecting plate 3;

[0037] The pressure application device 4 is installed on the column support 2 to provide stable thrust;

[0038] The vibrator 5 is connected to the connecting plate 3 via a fixed bracket 6. The main shaft at the top of the vibrator 5 is connected to the output end of the pressure application device 4, which is used to receive the thrust of the pressure application device 4 and convert it into dynamic amplitude.

[0039] The pressure block 7 is connected to the lower end of the vibrator 5 and is used to support the object being tested;

[0040] The displacement detection device 8 is mounted on the support base 1 and is used to provide a displacement measurement reference.

[0041] The displacement measuring head 9 is installed on the pressure block 7 and works in conjunction with the displacement detection device 8 to detect the displacement change of the object being measured.

[0042] Based on the above structure, the pressure application device 4, composed of a cylinder 41, a push rod 42, and a connecting base plate 43, can provide stable thrust, ensuring the stability and reliability of pressure application during the experiment. The telescopic end of the cylinder 41 is connected to the push rod 42, and the push rod 42 is connected to the vibrator 5 through the connecting base plate 43. This structural design makes the connection between the pressure application device 4 and the vibrator 5 more robust, the thrust transmission more efficient, and further improves the performance of the experimental platform.

[0043] In this embodiment, the pressure application device 4 includes a cylinder 41, a push rod 42, and a connecting base plate 43. The telescopic end of the cylinder 41 is connected to one end of the push rod 42, and the other end of the push rod 42 is connected to the top of the vibrator 5 via the connecting base plate 43. By employing the pressure application device 4 composed of the cylinder 41, push rod 42, and connecting base plate 43, a stable thrust can be provided, ensuring the stability and reliability of pressure application during the experiment. The telescopic end of the cylinder 41 is connected to the push rod 42, and the push rod 42 is connected to the vibrator 5 via the connecting base plate 43. This structural design makes the connection between the pressure application device 4 and the vibrator 5 more robust, the thrust transmission more efficient, and further improves the performance of the experimental platform.

[0044] Preferably, the displacement detection device 8 is a grating ruler. The grating ruler provides a precise displacement measurement reference, offering higher accuracy and lower cost compared to traditional inductive displacement sensors. This effectively improves the accuracy and reliability of experimental data, meeting the requirements for high-precision displacement detection.

[0045] Furthermore, the grating ruler is vertically mounted on the support base 1 via a fixed base 15. Using a grating ruler as the displacement detection device 8 offers advantages such as high precision, high resolution, and high repeatability. The vertically mounted grating ruler avoids measurement errors caused by installation angle deviations, further improving the accuracy and reliability of displacement detection and providing a more reliable measurement benchmark for experiments.

[0046] In this embodiment, the displacement measuring head 9 is a grating reading head. An adjustment seat 10 is provided between the grating reading head and the pressure block 7, and the adjustment seat 10 is provided with mounting holes 11. The adjustment seat 10 between the grating reading head and the pressure block 7, and the mounting holes 11 on the adjustment seat 10, allow for convenient adjustment of the position and angle of the grating reading head. This design improves the flexibility and adjustability of the experimental platform, enabling rapid adjustment of the measuring head position according to different experimental needs, ensuring the accuracy and reliability of the measurement.

[0047] Furthermore, a jack module 12 is provided on the support base 1 below the vibrator 5. The jack module 12 can be used to adjust the height and position of the vibrator 5, ensuring a more stable connection between the vibrator 5 and the pressure block 7, and further improving the stability and reliability of the experimental platform.

[0048] In addition, a dynamic force sensor 13 is installed between the vibrator 5 and the pressure block 7 to measure the combined force of the static pressure of the pressure application device 4 and the dynamic amplitude of the vibrator 5. This dynamic force sensor 13 allows for real-time measurement of the combined force of the static pressure of the pressure application device 4 and the dynamic amplitude of the vibrator 5. This design enables the experimental platform to not only detect displacement changes but also measure the combined force, providing more comprehensive mechanical data for the experiment and facilitating a deeper analysis of the stress state of the tested object under complex working conditions.

[0049] Furthermore, the dynamic force sensor 13 is installed between the vibrator 5 and the pressure block 7 via a threaded connection assembly 14. Installing the dynamic force sensor 13 between the vibrator 5 and the pressure block 7 via the threaded connection assembly 14 makes the sensor installation more secure and stable. Threaded connections offer advantages such as reliable connection, ease of disassembly and installation, effectively improving the stability and maintainability of the experimental platform while ensuring the accuracy of measurement data.

[0050] like Figure 4 As shown, the threaded connection assembly 14 includes a connecting rod 141 and a connecting seat 142, both of which are provided with threaded connection portions. Through the threaded connection, the position and angle of the dynamic force sensor 13 can be easily adjusted, ensuring a tighter connection between the dynamic force sensor 13 and the vibrator 5 and the pressure block 7, resulting in more accurate measurement data.

[0051] In this embodiment, due to the weight of the vibrator 5, it is connected to the fixed bracket 6 by connecting bolts when idle. The fixed bracket 6 can prevent the vibrator 5 from being displaced or damaged due to its own weight. When testing is required, the vibrator 5 can be separated from the fixed bracket 6.

[0052] The following describes the specific working process of detecting the gas film clearance change of a gas bearing using a displacement detection experimental platform with the above-mentioned structure under excitation pressure:

[0053] Place the gas bearing to be tested under the pressure block 7. At this time, the gas bearing is in a free state. The grating reading head collects the displacement data at this time as the initial reference value.

[0054] Remove the connecting bolts between the vibrator 5 and the fixed bracket 6 to separate the vibrator 5 from the fixed bracket 6;

[0055] Turn on the air source of cylinder 41, adjust the pressure of cylinder 41 to provide a stable static thrust; start the vibrator 5 to apply dynamic load according to the set frequency and amplitude.

[0056] When the gas bearing is subjected to pressure changes, the gas film gap will change, and the grating reading head will collect the displacement data of the gas bearing after being compressed in real time.

[0057] The change in the air film gap is calculated by comparing the displacement data before and after compression.

[0058] The dynamic force sensor 13 collects the combined force data of the static pressure of the pressure application device 4 and the dynamic amplitude of the vibrator 5 in real time.

[0059] After use, turn off the vibrator 5 and cylinder 41 in sequence, disconnect the power, and reinstall the vibrator 5 onto the fixed bracket 6 using the connecting bolts to ensure that it can be safely stored when not in use.

[0060] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A displacement detection experimental platform under excitation pressure, characterized in that, include: Support base; The column bracket is fixed to the support base; A connecting plate is provided on the column support; A pressure-applying device, mounted on the column support, is used to provide a stable thrust; The vibrator is connected to the connecting plate via a fixed bracket. The main shaft at the top of the vibrator is connected to the output end of the pressure application device to receive the thrust of the pressure application device and convert it into dynamic amplitude. The pressure block is connected to the lower end of the vibrator and is used to support the object being tested; A displacement detection device is mounted on the support base to provide a displacement measurement reference. The displacement measuring head is installed on the pressure block and works in conjunction with the displacement detection device to detect the displacement change of the object being measured.

2. The displacement detection experimental platform under excitation pressure according to claim 1, characterized in that: The pressure application device includes a cylinder, a push rod, and a connecting base plate. The telescopic end of the cylinder is connected to one end of the push rod, and the other end of the push rod is connected to the top of the vibrator through the connecting base plate.

3. The displacement detection experimental platform under excitation pressure according to claim 1, characterized in that: The displacement detection device is a grating ruler.

4. The displacement detection experimental platform under excitation pressure according to claim 3, characterized in that: The grating ruler is vertically mounted on the support base via a fixed base.

5. The displacement detection experimental platform under excitation pressure according to claim 4, characterized in that: The displacement measuring head is a grating reading head.

6. The displacement detection experimental platform under excitation pressure according to claim 5, characterized in that: An adjustment seat is provided between the grating reading head and the pressure block, and the adjustment seat is provided with mounting and fixing holes.

7. The displacement detection experimental platform under excitation pressure according to claim 1, characterized in that: A jack module is provided on the support base below the vibrator.

8. The displacement detection experimental platform under excitation pressure according to claim 1, characterized in that: A dynamic force sensor is installed between the vibrator and the pressure block to measure the combined force of the static pressure of the pressure application device and the dynamic amplitude of the vibrator.

9. The displacement detection experimental platform under excitation pressure according to claim 8, characterized in that: The dynamic force sensor is installed between the vibrator and the pressure block via a threaded connection assembly.

10. The displacement detection experimental platform under excitation pressure according to claim 9, characterized in that: The threaded connection assembly includes a connecting rod and a connecting seat, both of which are provided with threaded connection portions.

Images