Damping measurement experiment equipment and detection method for rubber pad of anti-vibration hammer wire clamp

Abstract

The present application relates to a kind of damping measurement experimental equipment and detection method of rubber pad for anti-vibration hammer clamp, the experimental equipment includes: weight (1), connecting fixture (2), first core rod (3), support frame (4), vibration table (5), first acceleration sensor (6-1), second acceleration sensor (6-2), data acquisition equipment (7) and data calculator (8).The technical scheme provided by the present application provides more reliable data for anti-vibration hammer simulation calculation, and also provides technical support for the processing and manufacturing of anti-vibration hammer, thereby ensuring the safe operation of overhead transmission line during the use of anti-vibration hammer.

Description

Technical Field

[0001] This invention relates to the field of vibration damping fittings, specifically to a damping measurement experimental device and testing method for a rubber pad used in vibration damping hammer clamps. Background Technology

[0002] Vibration dampers are the most widely used vibration damping components on power transmission lines in my country. They consist of a weighted hammer, high-elasticity, high-strength galvanized steel strand, and clamps. When the conductor vibrates, the relative motion of the vibration damper suspended on the conductor absorbs the vibration energy, thereby reducing or eliminating the vibration. The power characteristic of a vibration damper is an inherent property of its energy dissipation capacity as a function of vibration frequency, and it is an important indicator to consider in the design of vibration dampers. Besides being related to the hammer head structure and weight, the energy dissipation of a vibration damper is also closely related to the stiffness and damping parameters of the system consisting of the vibration damper, steel strand, and clamps.

[0003] Currently, in areas with frequent and stable winds, the conductors and ground wires of transmission lines are constantly subjected to light wind vibrations. This can cause the vibration dampers to slip on the conductors, and even lead to conductor wear. Therefore, some manufacturers have proposed adding rubber pads inside the vibration damper clamps to solve this problem. However, the damping of the rubber pads has a significant impact on the power characteristics of the vibration dampers, so the damping of the rubber pads added to the vibration damper clamps must be considered during the design process. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a damping measurement experimental device and testing method for rubber pads used in vibration damper clamps, which provides more reliable data for vibration damper simulation calculations and also provides technical support for the processing and manufacturing of vibration dampers.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] This invention provides a damping measurement experimental device for a rubber pad used in a vibration damping hammer clamp, the improvement of which is that the device includes:

[0007] 1. Weight 2. Connecting clamp 3. First core rod 4. Support frame 5. Vibration table 6-1. First accelerometer 6-2. Second accelerometer 6-2. Data acquisition device 7. and data calculator 8;

[0008] The weight 1 is connected to the connecting clamp 2;

[0009] The first core rod 3 is inserted into the hole of the connecting clamp 2, and the two ends of the first core rod 3 are placed on both sides of the support frame 4;

[0010] The support frame 4 is fixed on the table surface of the vibration table 5;

[0011] The first acceleration sensor 6-1 is placed above the weight 1;

[0012] The second acceleration sensor 6-2 is placed above the support frame 4;

[0013] One end of the acquisition device 7 is connected to the first accelerometer 6-1 and the second accelerometer 6-2 via two test lines, and the other end is connected to the data calculator 8 via a data line.

[0014] Preferably, the bottom of the weight 1 is provided with a weight bolt 1-1, and is connected to the connecting clamp 2 through the weight bolt 1-1.

[0015] Preferably, the support frame 4 includes: vertical support members 4-1 on both sides, horizontal support member 4-2 at the bottom, and bolts 4-3 disposed at the bottom of the horizontal support member;

[0016] The vertical support members 4-1 on both sides are provided with grooves 4-1-1 above them for fixing the two ends of the first core rod 3 placed on both sides of the support frame 4.

[0017] The horizontal support 4-2 at the bottom is used to place the first acceleration sensor 6-1;

[0018] The bolts 4-3 located at the bottom of the transverse support are used for fixing to the vibration table 5.

[0019] Preferably, the equipment further includes: a stiffness testing device 9 and a stiffness testing fixture 10.

[0020] Furthermore, the stiffness testing fixture 10 includes: a pressure block 10-1 and a second mandrel 10-2.

[0021] Based on the above experimental equipment, this invention provides a damping detection method for rubber pads used in anti-vibration hammer clamps, the improvement of which is that the method includes the following steps:

[0022] Step (1): Obtain the vibration damping hammer under test at vibration reduction frequencies f1 to f2. i The displacement amplitude A1~A of the rubber pad used for the anti-vibration hammer clamp during the downward oscillation. i ;

[0023] Step (2): Attach the anti-vibration hammer clamp to be tested to the second core rod 10-2 of the stiffness testing fixture 10 with a rubber pad, and cover it with the pressure block 10-1 of the stiffness testing fixture 10. Then place the stiffness testing fixture 10 on the working platform of the stiffness testing device 9.

[0024] Step (3): The hydraulic loading device of the stiffness testing device 9 applies pressure to the stiffness testing fixture 10. When the displacement sensor in the stiffness testing device 9 displays a displacement of A1, the pressure value applied by the force sensor in the stiffness testing device 9 is recorded as F1. Step (3) is repeated until the displacement sensor displays a displacement of A1. i At that time, the applied pressure value F displayed in the force sensor of the corresponding stiffness testing device 9 is recorded. i ;

[0025] Step (4): Determine the displacements A1 to A2 in step (1). i The average value A eq and the pressure F1~F in step (3) i The average value F eq And according to the formula Determine the vibration damping hammer wire at the vibration reduction frequency f. i Stiffness k during vibration i ;

[0026] Step (5): Wrap the anti-vibration hammer clamp to be tested with a rubber pad on the first core rod 3 of the damping measuring device, then insert the first core rod 3 into the hole of the connecting clamp 2, and connect it to the support frame 4 through the bolts at both ends of the first core rod 3;

[0027] Step (6): Start the vibration table and output an excitation velocity with an amplitude of 0.075 m / s. Use the data acquisition device 7 to acquire the velocity of the first accelerometer 6-1 channel and the velocity of the second accelerometer 6-2 channel in the damping measurement device, and record the velocity of the first accelerometer 6-1 channel as V0 and the velocity of the second accelerometer 6-2 channel as V.

[0028] Step (7): Data calculator 8 according to the formula Determine the vibration damping hammer at the vibration reduction frequency f. i Velocity transmissibility B during vibration i ;

[0029] Step (8): Based on the stiffness k obtained in step (4) i The velocity transfer rate B obtained in step (7) i Using formula Determine the vibration damping hammer at the vibration reduction frequency f. i The damping of the anti-vibration hammer clamp is achieved by using rubber pads during vibration.

[0030] Where f1 is the minimum damping frequency within the damping frequency range of the vibration damping hammer, f i F1 is the maximum damping frequency within the damping frequency range of the vibration damper, and F1 is the pressure value applied when the displacement amplitude of the rubber pad used for the vibration damper clamp is A1. iThe displacement amplitude of the rubber pad used for the anti-vibration hammer clamp is A. i The applied pressure value, c i To prevent the vibratory hammer from operating at the damping frequency f i The damping of the anti-vibration hammer clamp is achieved by the rubber pad during the oscillation. m is the mass of the weight, and ω is the angular frequency of the vibration excitation velocity output by the vibration table.

[0031] Compared with the closest existing technology, the present invention has the following advantages:

[0032] This invention provides an experimental device and testing method for measuring the damping of rubber pads used in vibration damper clamps. By measuring the damping of the rubber pads used in vibration damper clamps, more reliable data is provided for the simulation calculation of vibration dampers, thereby providing technical support for the processing and manufacturing of vibration dampers, ensuring the accuracy of vibration damper manufacturing, and ultimately enabling the safe operation of overhead transmission lines. Attached Figure Description

[0033] Figure 1 This is a structural diagram of the damping test device in the damping measurement experimental equipment for the rubber pad of the anti-vibration hammer clamp provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the connection between the weight and the connecting clamp in a damping measurement experimental device for a rubber pad used in a vibration damping hammer clamp provided by the present invention.

[0035] Figure 3 This is a structural diagram of the support frame in the damping test device of the damping measurement experimental equipment for the rubber pad of the anti-vibration hammer clamp provided by the present invention;

[0036] Figure 4 This is a structural diagram of the stiffness testing device in the damping measurement experimental equipment for the rubber pad of the anti-vibration hammer clamp provided by the present invention;

[0037] Figure 5 This is a structural diagram of a stiffness testing fixture in a damping measurement experimental device for a rubber pad used in a vibration damping hammer clamp, provided by the present invention.

[0038] The components include: 1. Weight block; 1-1. Weight block bolt; 2. Connecting clamp; 3. First mandrel; 4. Support frame; 4-1. Vertical support; 4-2. Horizontal support and bolt; 4-3. Groove; 4-1-1. Vibration table; 5. First accelerometer sensor; 6-2. Second accelerometer sensor; 7. Data acquisition device; 8. Data calculator; 9. Stiffness testing device; 10. Stiffness testing fixture; 10. Pressure block; 10-1. Second mandrel; and 10-3. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1

[0042] This invention provides a damping measurement experimental device for a rubber pad used in a vibration damping hammer clamp, such as... Figure 1 As shown, the device includes:

[0043] 1. Weight 2. Connecting clamp 3. First core rod 4. Support frame 5. Vibration table 6-1. First accelerometer 6-2. Second accelerometer 6-2. Data acquisition device 7. and data calculator 8;

[0044] The weight 1 is connected to the connecting clamp 2;

[0045] The first core rod 3 is inserted into the hole of the connecting clamp 2, and the two ends of the first core rod 3 are placed on both sides of the support frame 4;

[0046] The support frame 4 is fixed on the table surface of the vibration table 5;

[0047] The first acceleration sensor 6-1 is placed above the weight 1;

[0048] The second acceleration sensor 6-2 is placed above the support frame 4;

[0049] One end of the acquisition device 7 is connected to the first accelerometer 6-1 and the second accelerometer 6-2 via two test lines, and the other end is connected to the data calculator 8 via a data line.

[0050] In embodiments of the present invention, such as Figure 2 As shown, the bottom of the weight 1 is provided with a bolt 1-1, and is connected to the thread on the top of the connecting clamp 2 through the bolt 1-1.

[0051] In embodiments of the present invention, such as Figure 3 As shown, the support frame 4 includes: vertical support members 4-1 on both sides, horizontal support member 4-2 at the bottom, and bolts 4-3 set at the bottom of the horizontal support member;

[0052] The vertical support members 4-1 on both sides are provided with grooves 4-1-1 above them for fixing the two ends of the first core rod 3 placed on both sides of the support frame 4.

[0053] The horizontal support 4-2 at the bottom is used to place the first acceleration sensor 6-1;

[0054] The bolts 4-3 located at the bottom of the transverse support are used to fix it to the vibration table 5.

[0055] Specifically, the device also includes: Figure 4 The stiffness testing device 9 shown and as follows Figure 5 The stiffness testing fixture 10 shown is used for the test.

[0056] The stiffness testing device 9 consists of a foundation and a workbench at the bottom, and a force sensor, a displacement sensor and a hydraulic loading device at the top.

[0057] The stiffness testing fixture 10 includes a pressure block 10-1 and a second mandrel 10-2. When in use, the rubber pad 10-3 to be tested is placed between the pressure block 10-1 and the second mandrel 10-2.

[0058] Example 2

[0059] Based on the experimental equipment provided in Example 1, the present invention provides a damping detection method for a rubber pad used in a vibration damping hammer clamp, the method comprising the following steps:

[0060] Step (1): Obtain the vibration damping hammer under test at vibration reduction frequencies f1 to f2. i The displacement amplitude A1~A of the rubber pad used for the vibration damper clamp during the downward vibration. i ;

[0061] Step (2): Attach the anti-vibration hammer clamp to be tested to the second core rod 10-2 of the stiffness testing fixture 10 with a rubber pad, and cover it with the pressure block 10-1 of the stiffness testing fixture 10. Then place the stiffness testing fixture 10 on the working platform of the stiffness testing device 9.

[0062] Step (3): The hydraulic loading device of the stiffness testing device 9 applies pressure to the stiffness testing fixture 10. When the displacement sensor in the stiffness testing device 9 displays a displacement of A1, the pressure value applied by the force sensor in the stiffness testing device 9 is recorded as F1. Step (3) is repeated until the displacement sensor displays a displacement of A1. i At that time, the applied pressure value F displayed in the force sensor of the corresponding stiffness testing device 9 is recorded. i ;

[0063] Step (4): Determine the displacements A1 to A2 in step (1). i The average value A eq and the pressure F1~F in step (3) i The average value F eq And according to the formula Determine the vibration damping hammer wire at the vibration reduction frequency f. i Stiffness k during vibration i ;

[0064] Step (5): Wrap the anti-vibration hammer clamp to be tested with a rubber pad on the first core rod 3 of the damping measuring device, then insert the first core rod 3 into the hole of the connecting clamp 2, and connect it to the support frame 4 through the bolts at both ends of the first core rod 3;

[0065] Step (6): Start the vibration table and output an excitation velocity with an amplitude of 0.075 m / s. Use the data acquisition device 7 to acquire the velocity of the first accelerometer 6-1 channel and the velocity of the second accelerometer 6-2 channel in the damping measurement device, and record the velocity of the first accelerometer 6-1 channel as V0 and the velocity of the second accelerometer 6-2 channel as V.

[0066] Step (7): Data calculator 8 according to the formula Determine the vibration damping hammer at the vibration reduction frequency f. i Velocity transmissibility B during oscillation i ;

[0067] Step (8): Based on the stiffness k obtained in step (4) i The velocity transfer rate B obtained in step (7) i Using formula Determine the vibration damping hammer at the vibration reduction frequency f. i The damping of the anti-vibration hammer clamp is achieved by using rubber pads during vibration.

[0068] Where f1 is the minimum damping frequency within the damping frequency range of the vibration damping hammer, f i F1 is the maximum damping frequency within the damping frequency range of the vibration damper, and F1 is the pressure value applied when the displacement amplitude of the rubber pad used for the vibration damper clamp is A1. i The displacement amplitude of the rubber pad used for the anti-vibration hammer clamp is A. i The applied pressure value, c i To prevent the vibratory hammer from operating at the damping frequency f i The damping of the vibration damper is achieved by the rubber pads of the anti-vibration hammer clamp during vibration, where m is the mass of the weight and ω is the angular frequency of the vibration excitation velocity output by the vibration table.

[0069] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0070] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0071] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0072] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting the damping of a rubber pad used in a vibration damper clamp, characterized in that, The damping measurement experimental device based on the rubber pad of the anti-vibration hammer clamp is implemented. The device includes: Weight (1), connecting clamp (2), first mandrel (3), support frame (4), vibration table (5), first accelerometer (6-1), second accelerometer (6-2), data acquisition device (7) and data calculator (8); The weight (1) is connected to the connecting clamp (2); The first core rod (3) is inserted into the hole of the connecting clamp (2), and the two ends of the first core rod (3) are placed on both sides of the support frame (4); The support frame (4) is fixed on the table surface of the vibration table (5); The first accelerometer (6-1) is placed above the weight (1); The second acceleration sensor (6-2) is placed above the support frame (4); One end of the acquisition device (7) is connected to the first accelerometer (6-1) and the second accelerometer (6-2) respectively via two test lines, and the other end is connected to the data calculator (8) via a data line; The equipment also includes: a stiffness testing device (9) and a stiffness testing fixture (10); The stiffness testing fixture (10) includes: a pressure block (10-1) and a second mandrel (10-2); The method includes the following steps: Step (1): Obtain the vibration damping hammer under test at the vibration reduction frequency. The displacement amplitude of the rubber pad used in the vibration damper clamp during the downward vibration. ; Step (2): Attach the anti-vibration hammer clamp to be tested to the second core rod (10-2) of the stiffness testing fixture (10) with a rubber pad, and cover it with the pressure block (10-1) of the stiffness testing fixture (10). Then place the stiffness testing fixture (10) on the working platform of the stiffness testing device (9). Step (3): The hydraulic loading device of the stiffness testing device (9) applies pressure to the stiffness testing fixture (10). When the displacement sensor in the stiffness testing device (9) displays a displacement of... At that time, the applied pressure value displayed in the force sensor of the corresponding stiffness testing device (9) is recorded. Repeat step (3) until the displacement sensor displays the displacement as... At that time, the applied pressure value displayed in the force sensor of the corresponding stiffness testing device (9) is recorded. ; Step (4): Calculate the displacement in step (1) average and pressure in step (3) average And according to the formula Determine the vibration damping plumb line at the vibration reduction frequency. Stiffness during downward oscillation ; Step (5): Wrap the anti-vibration hammer clamp to be tested with a rubber pad on the first core rod (3) of the damping measuring device, then insert the first core rod (3) into the hole of the connecting clamp (2), and connect it to the support frame (4) through the bolts at both ends of the first core rod (3); Step (6): Start the vibration table and output an excitation velocity with an amplitude of 0.075 m / s. Use the data acquisition device (7) to acquire the velocity of the first accelerometer (6-1) channel and the velocity of the second accelerometer (6-2) channel in the damping measurement device, and record the velocity of the first accelerometer (6-1) channel as follows: V The velocities of channels 0 and 2 (6-2) of the accelerometer are V ; Step (7): Data calculator (8) according to the formula Determine the vibration damper at the frequency Velocity transmissibility during vibration B i ; Step (8): Stiffness obtained from step (4) and the velocity transfer rate obtained in step (7) B i Using formula Determine the vibration damper at the frequency The damping of the anti-vibration hammer clamp is achieved by using rubber pads during vibration. in, The minimum damping frequency within the damping frequency range of the vibration damping hammer. The maximum vibration reduction frequency within the vibration reduction frequency range of the vibration damping hammer. The displacement amplitude of the rubber pad used for the anti-vibration hammer clamp is The pressure value applied at that time, The displacement amplitude of the rubber pad used for the anti-vibration hammer clamp is The pressure value applied at that time, To prevent the vibratory hammer from operating at the damping frequency The damping of the vibration damper clamp using rubber pads during vibration is achieved. For the mass of the heavy block, The angular frequency of the vibration excitation velocity output by the vibration table.

2. The method as described in claim 1, characterized in that, The bottom of the weight block (1) is provided with a weight block bolt (1-1), and is connected to the connecting clamp (2) through the weight block bolt (1-1).

3. The method as described in claim 1, characterized in that, The support frame (4) includes: vertical support members (4-1) on both sides, horizontal support member (4-2) at the bottom, and bolts (4-3) at the bottom of the horizontal support member. The vertical support members (4-1) on both sides are provided with grooves (4-1-1) for fixing the two ends of the first core rod (3) placed on both sides of the support frame (4); The bottom lateral support (4-2) is used to place the first acceleration sensor (6-1). The bolts (4-3) located at the bottom of the transverse support are used for fixing to the vibration table (5).

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