Tool for testing transverse static and dynamic characteristics of large-bearing vibration isolator and clamping method

Abstract

The invention relates to the technical field of vibration isolator testing, and provides a large-bearing vibration isolator transverse static and dynamic characteristic testing tool and a clamping method, and the testing tool comprises a bearing seat which is used for connecting the input ends of two large-bearing vibration isolators in series and is connected with the action end of a testing machine; the two bearing side plates are used for being connected with the output ends of the two large-bearing vibration isolators in a one-to-one correspondence mode. The plurality of studs are arranged on the two bearing side plates in a penetrating manner, so that the two bearing side plates are locked through nuts after the two bearing side plates apply a preset load to the two large-bearing vibration isolators by utilizing a testing machine; and the mounting bottom plate is connected with the two bearing side plates and is used for being connected with a non-action end of the testing machine. According to the invention, the auxiliary installation and loading functions of the transverse performance test of the large-bearing vibration isolator are realized through the mutual cooperation among the stud, the structure of the tool and the testing machine.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration isolator testing, and in particular to a tool and a clamping method for testing the lateral static and dynamic characteristics of a large-load vibration isolator. Background Art

[0002] Mechanical vibration is ubiquitous across various engineering fields, and the resulting equipment damage and noise hazards are pressing issues to address. Vibration isolators, a widely used vibration isolation component, are attracting increasing attention and research. The demand for high-load vibration isolators is increasing due to the need for vibration isolation in large-scale equipment. Key performance indicators for high-load vibration isolators include stiffness, damping ratio, and mechanical impedance, and universal testing machines are often used to directly or indirectly test these.

[0003] High-load vibration isolators are typically installed in various ways, including horizontal, side-mounted, suspended, and tilted positions. Therefore, in engineering applications, it is often necessary to test the isolator's parameters in three directions. Testing the isolator in the non-load-bearing direction (perpendicular to the load-bearing direction, also known as the transverse direction) requires side-mounting or tilting the isolator. During testing, static and dynamic forces must be applied to the isolator in the non-load-bearing direction while it is in its rated load-bearing state.

[0004] However, the clamping fixtures of existing testing machines can usually only provide a fixed clamping function in the load-bearing direction and cannot meet the installation and loading conditions in the non-load-bearing direction mentioned above; and for large-load vibration isolators, their rated loads are relatively high, and it is difficult to apply the rated load to them only by means of bolt preloading. Therefore, how to provide a fixture that can provide auxiliary clamping and loading functions for large-load vibration isolators during lateral static and dynamic characteristic tests is an urgent problem to be solved in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-load vibration isolator lateral static and dynamic characteristics test fixture and clamping method to solve the defects of the existing technology, and provide auxiliary clamping and loading functions for the lateral static and dynamic characteristics test of the large-load vibration isolator.

[0006] The present invention is achieved through the following technical solutions:

[0007] A test fixture for the lateral static and dynamic characteristics of a large-load vibration isolator, comprising:

[0008] The bearing seat is used to connect the input ends of the two large bearing vibration isolators and connect to the action end of the testing machine;

[0009] Two load-bearing side plates are used for connecting the output ends of two large load-bearing vibration isolators in a one-to-one correspondence;

[0010] A plurality of stud bolts are provided through the two load-bearing side plates so as to lock the two load-bearing side plates with nuts after the two load-bearing side plates apply a predetermined load to the two large load-bearing vibration isolators using a testing machine;

[0011] and a mounting base plate, which is connected to the two load-bearing side plates and is used to connect the non-action end of the testing machine.

[0012] Optionally, two L-shaped connecting plates are further included, which are connected to the top of the mounting base plate through fasteners, one connecting plate is connected to one of the load-bearing side plates through fasteners, and the other connecting plate is connected to the other load-bearing side plate through fasteners.

[0013] Optionally, the fasteners connecting the mounting base and the connecting plate are bolts, the holes for mounting the bolts on the mounting base or the connecting plate are strip-shaped through holes, and the length direction of the strip-shaped through holes is the connection direction of the two load-bearing side plates.

[0014] Optionally, the fasteners connecting the mounting base plate and the connecting plate are screws, the holes for mounting the screws on the mounting base plate are strip-shaped through holes, and the length direction of the strip-shaped through holes is the connection direction of the two load-bearing side plates.

[0015] Optionally, the bearing seat includes a connecting plate and a bearing top plate, the bearing top plate is fixedly connected to the top of the connecting plate, two large bearing vibration isolators are connected to both sides of the connecting plate through fasteners, and the bearing top plate is used to connect to the action end of the testing machine.

[0016] Optionally, four stud bolts are provided and are respectively arranged near four corners of the large load-bearing vibration isolator.

[0017] Optionally, the test fixture further includes a guide rod, which is passed through the two bearing side plates.

[0018] Optionally, a limiting member is provided on the inner sides of the two bearing side plates for limiting the two from approaching each other.

[0019] Optionally, the limiting member includes two limiting rods, one end of the two limiting rods are connected to each other by threads, and the other end of the two limiting rods is provided with a positioning rod with a smaller diameter than the limiting rod, the positioning rod on one of the limiting rods is passed through one of the bearing side plates, and the positioning rod on the other limiting rod is passed through the other bearing side plate.

[0020] The present invention also provides a clamping method for testing the lateral static and dynamic characteristics of a large-load vibration isolator, which adopts any one of the test fixtures described above and includes the following steps:

[0021] S1. Connect the bearing base to the input ends of the two bearing vibration isolators respectively, and connect the two bearing side plates to the output ends of the two bearing vibration isolators in a one-to-one correspondence;

[0022] S2. Place the assembled structure obtained in step S1 on a testing machine, with one of the load-bearing side plates facing the actuating end of the testing machine and the other load-bearing side plate facing the non-acting end of the testing machine;

[0023] S3. Use the testing machine to squeeze the load-bearing side plates and apply load to the two large load-bearing isolators in the load-bearing direction. After reaching the predetermined load, install the stud bolts and tighten the nuts with a torque wrench.

[0024] S4. Connect the installation base plate to the two load-bearing side plates;

[0025] S5. Adjust the tooling posture, connect and fix the installation base plate to the non-acting end of the testing machine, and adjust and fix the acting end of the testing machine to the bearing seat.

[0026] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0027] In the present invention, two large-load vibration isolators can be preliminarily installed by means of the provided bearing seat and two bearing side plates. The combined structure obtained after installation can be used to squeeze the two bearing side plates in a test. After reaching the predetermined load, the bearing side plates are locked by stud bolts and nuts, so that the large-load vibration isolator is in a rated load state in the load direction, meeting the requirements for the lateral characteristic test of the large-load vibration isolator. During the lateral test, it is only necessary to connect the bearing seat to the action end of the testing machine, connect the installation base plate to the non-action end of the testing machine, and use the action end of the testing machine to apply static and dynamic loads to achieve the test purpose. It can be seen that the present invention realizes the auxiliary installation and loading functions of the lateral performance test of the large-load vibration isolator through the mutual cooperation between the stud bolts, the tooling structure itself, and the testing machine. In addition, since the position of the nut on the stud bolt can be changed, the bearing side plates can be locked by bolts after applying different rated loads to the large-load vibration isolator according to different test requirements, which can adapt to a wider range of test conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a large-load vibration isolator lateral static and dynamic characteristics testing tool provided in Example 1;

[0029] Figure 2 A front view of a large-load vibration isolator lateral static and dynamic characteristics test fixture provided in Example 1;

[0030] Figure 3 A schematic diagram of the structure of a large-load vibration isolator lateral static and dynamic characteristics testing tool provided in Example 2;

[0031] Figure 4 Schematic cross-sectional view of the connection between the position-limiting member and the load-bearing side plate in Example 2;

[0032] Figure markings: 1-bearing side plate, 2-bearing seat, 201-connecting plate, 202-bearing top plate, 3-stud bolt, 4-mounting base plate, 5-connecting plate, 6-limiting member, 601-limiting rod, 602-positioning rod, 7-large bearing vibration isolator. DETAILED DESCRIPTION

[0033] Example 1

[0034] refer to Figure 1 and Figure 2 A large-load-bearing vibration isolator lateral static and dynamic characteristics test fixture includes a load-bearing seat 2, a mounting base 3, two load-bearing side plates 1 and a plurality of stud bolts 3.

[0035] The bearing seat 2 is used to connect the input ends of the two large bearing isolators 7 and connect the action end of the testing machine (not shown). As an option, the bearing seat 2 in this embodiment includes a connection plate 201 and a bearing top plate 202. The bearing top plate 202 is fixedly connected (preferably welded) to the top of the connection plate 201. In actual application, reinforcing ribs can also be welded between the bearing top plate 202 and the connection plate 201 to ensure the overall strength of the bearing seat 2. The two large bearing isolators 7 are connected to both sides of the connection plate 201 by fasteners (such as screws and bolts). The bearing top plate 202 is used to connect the action end of the testing machine. In actual application, the bearing top plate 202 can be connected and fastened to the connecting seat of the action end of the testing machine by bolts. It is easy to understand that the bearing top plate 202 should be provided with corresponding connection holes (not shown).

[0036] In other embodiments, the bearing seat 2 can of course be other structures, as long as it can connect two large bearing isolators 7 and can be connected to the action end of the testing machine. For example, the bearing seat 2 is a rectangular frame structure, the two opposite sides are used to connect the large bearing isolators 7, and the top surface is used to connect the action end of the testing machine.

[0037] The two load-bearing side plates 1 are used to connect the output ends of the two large-load-bearing vibration isolators 7 in a one-to-one correspondence. After the load-bearing side plates 1 are connected, the load-bearing base 2, the two large-load-bearing vibration isolators 7, and the two load-bearing side plates 1 form an integrated composite structure. Stud bolts 3 can be inserted through the two load-bearing side plates 1. After the composite structure compresses the two load-bearing side plates 1 to a predetermined load through a test, the load-bearing side plates 1 are tightened using the stud bolts 3 and nuts, thereby placing the large-load-bearing vibration isolators 7 at their rated load in the load direction, meeting the requirements for the lateral characteristics test of the large-load-bearing vibration isolators 7. As an option, four stud bolts 3 are provided, arranged near the four corners of the large-load-bearing vibration isolators 7, to improve the uniformity of the load on the large-load-bearing vibration isolators 7. In other embodiments, other numbers of stud bolts 3 may also be provided.

[0038] The mounting base 3 is connected to the two load-bearing side plates 1 and is used to connect the non-action end of the testing machine. In actual applications, the mounting base 3 can be fastened to the connection seat of the non-action end of the testing machine by bolts. It is easy to understand that corresponding connection holes should be provided on the mounting base 3 (not shown). After the load-bearing vibration isolator is in the rated load state in the load-bearing direction, it is only necessary to connect the load-bearing seat 2 to the action end of the testing machine, and connect the mounting base 3 to the non-action end of the testing machine, and use the action end of the testing machine to apply static and dynamic loads to achieve the test purpose. It can be seen that the present invention realizes the auxiliary installation and loading function of the lateral performance test of the large load-bearing vibration isolator 7 through the mutual cooperation between the stud bolts 3, the tooling structure itself and the testing machine. In addition, since the position of the nut on the stud bolt 3 can be changed, according to different test requirements, the large load-bearing vibration isolator 7 can be tightened with the load-bearing side plate 1 by bolts after applying different rated loads, which can adapt to a wider range of test conditions.

[0039] As an option, the test fixture in this embodiment also includes two L-shaped connecting plates 5. On this basis, the mounting base plate 3 is connected to the two load-bearing side plates 1 through the connecting plates 5. Specifically, the connecting plates 5 are connected to the top of the mounting base plate 3 by fasteners, with one connecting plate 5 being connected to one of the load-bearing side plates 1 by fasteners, and the other connecting plate 5 being connected to the other load-bearing side plate 1 by fasteners. In this embodiment, the fasteners connecting the mounting base plate 3 and the connecting plates 5 are bolts. The holes for installing the bolts on the mounting base plate 3 are strip-shaped through holes, and the length direction of the strip-shaped through holes is the direction of the line connecting the two load-bearing side plates 1. It is worth noting that this arrangement allows the position of the mounting base plate 3 in the continuous direction of the two load-bearing side plates 1 to be appropriately adjusted, avoiding changes in the load direction of the large load-bearing vibration isolator 7 during the process of connecting the mounting base plate 3 to the load-bearing side plates 1. In other embodiments, the fasteners connecting the mounting base plate 3 and the connecting plates 5 can also be screws. The holes for installing the screws on the mounting base plate 3 are strip-shaped through holes, and the length direction of the strip-shaped through holes is the direction of the line connecting the two load-bearing side plates 1. In addition, it is easy to understand that the fasteners connecting the load-bearing side plate 1 and the connecting plate 5 can also be bolts or screws.

[0040] In other embodiments, the mounting base plate 3 and the two load-bearing side plates 1 may be connected via the connecting plate 5 by other means, such as screws. Similarly, to avoid load variations in the bearing direction of the large-load isolator 7 during the connection process, the mounting screw holes in the mounting base plate 3 are strip-shaped through holes, with the length of the strip-shaped through holes being in the direction of the line connecting the two load-bearing side plates 1.

[0041] Example 2

[0042] refer to Figure 3This embodiment is a further optimization of the first embodiment. In this example, the test fixture further includes guide rods, which are provided through the two load-bearing side plates 1. It is worth noting that the provision of the guide rods can play a guiding role when the two load-bearing side plates 1 are squeezed by the testing machine, thereby preventing the two load-bearing side plates 1 from being misaligned and causing loads to be applied to the non-load-bearing direction of the large load-bearing vibration isolator 7.

[0043] In this embodiment, the inner sides of the two load-bearing side panels 1 are provided with stoppers 6 for preventing them from approaching each other. The stoppers 6, together with the nuts on the stud bolts 3 on the outer sides of the load-bearing side panels 1, limit the position of the load-bearing side panels 1. It should be noted that, in subsequent tests, there was virtually no force that would cause further compression between the two load-bearing side panels 1. Therefore, the stoppers 6 are merely an option, not a requirement.

[0044] As an option, in this embodiment, there are two limit members 6, each of which includes two limit rods 601. Figure 4 One end of the two limit rods 601 is connected to each other by a thread, and the other end of the two limit rods 601 is provided with a positioning rod 602 with a smaller diameter than the other end. The positioning rod 602 on one of the limit rods 601 is inserted into one of the load-bearing side plates 1, and the positioning rod 602 on the other limit rod 601 is inserted into the other load-bearing side plate 1. On this basis, the positioning rod 602 can act as the above-mentioned guide rod. Moreover, since the two limit rods 601 are connected by threads, after the load direction of the large-load vibration isolator 7 reaches the rated load, by changing the connection depth of the two limit rods 601, the end of the positioning rod 602 set on the limit rod 601 can be abutted against the load-bearing side plate 1, and cooperate with the nut on the stud bolt 3 on the outside of the load-bearing side plate 1 to accurately limit the position of the load-bearing side plate 1. In order to facilitate the rotation of the two limit rods 601 using a tool, the upper section of the limit rod 601 can be designed with a regular hexagonal cross-section.

[0045] In other embodiments, the limiting member 6 can of course be other structures, for example, the limiting member 6 is a nut connected to the stud 3 on the inner side of the load-bearing side plate 1. It is easy to understand that in this case, the limiting member 6 and the guide rod are independent of each other.

[0046] Example 3

[0047] This embodiment provides a clamping method for testing the lateral static and dynamic characteristics of a large-load vibration isolator, using the test fixture provided in Example 1, including the following steps:

[0048] S1. Connect the bearing seat 2 to the input ends of the two bearing vibration isolators respectively, and connect the two bearing side plates 1 to the output ends of the two bearing vibration isolators in a one-to-one correspondence. Both connections are made by bolt connection. After this step is completed, the bearing seat 2, the two large bearing vibration isolators 7 and the two bearing side plates 1 form an integrated combined structure;

[0049] S2. Place the assembled structure obtained in step S1 on a testing machine, with one of the load-bearing side plates 1 facing the actuating end of the testing machine and the other load-bearing side plate 1 facing the non-acting end of the testing machine;

[0050] S3. Use the testing machine to squeeze the load-bearing side plate 1 and apply a load to the two large-load-bearing vibration isolators 7 in the load-bearing direction. After reaching the predetermined load, install the stud bolts 3 and tighten the nuts with a torque wrench to maintain the rated load of the two large-load-bearing vibration isolators 7 in the load-bearing direction.

[0051] S4. Connect the mounting base plate 3 to the two load-bearing side plates 1, that is, connect the mounting base plate 3 and the two load-bearing side plates 1 through the connecting plate 5 to achieve the installation state required for the lateral characteristic test of the large-load vibration isolator 7;

[0052] S5. Adjust the tooling posture, connect and fix the mounting base 3 to the non-acting end of the testing machine, adjust the acting end of the testing machine to connect and fix it to the bearing seat 2, and use the acting end of the testing machine to apply static and dynamic loads to achieve the test purpose.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A large load-bearing vibration isolator lateral static and dynamic characteristics test tool, characterized in that: include: The bearing seat is used to connect the input ends of the two large bearing vibration isolators and connect to the action end of the testing machine; Two load-bearing side plates are used for connecting the output ends of two large load-bearing vibration isolators in a one-to-one correspondence; A plurality of stud bolts are provided through the two load-bearing side plates so as to lock the two load-bearing side plates with nuts after the two load-bearing side plates apply a predetermined load to the two large load-bearing vibration isolators using a testing machine; and a mounting base plate, which is connected to the two load-bearing side plates and is used to connect the non-action end of the testing machine.

2. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 1 is characterized in that: It also includes two L-shaped connecting plates, which are connected to the top of the mounting base plate through fasteners, one connecting plate is connected to one of the load-bearing side plates through fasteners, and the other connecting plate is connected to the other load-bearing side plate through fasteners.

3. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 2 is characterized in that: The fasteners connecting the mounting base plate and the connecting plate are bolts, and the holes for mounting the bolts on the mounting base plate or the connecting plate are strip-shaped through holes, and the length direction of the strip-shaped through holes is the connection direction of the two load-bearing side plates.

4. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 2 is characterized in that: The fasteners connecting the mounting base plate and the connecting plate are screws, the holes for mounting the screws on the mounting base plate are strip-shaped through holes, and the length direction of the strip-shaped through holes is the connection direction of the two load-bearing side plates.

5. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 1 is characterized in that: The bearing seat includes a connecting plate and a bearing top plate, the bearing top plate is fixedly connected to the top of the connecting plate, two large bearing vibration isolators are connected to both sides of the connecting plate through fasteners, and the bearing top plate is used to connect the action end of the testing machine.

6. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 1 is characterized in that: There are four stud bolts, which are respectively arranged near the four corners of the large load-bearing vibration isolator.

7. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to any one of claims 1 to 6, characterized in that: The test fixture also includes a guide rod, which is passed through the two load-bearing side plates.

8. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to any one of claims 1 to 6, characterized in that: The inner sides of the two bearing side plates are provided with limiting members for limiting the two from approaching each other.

9. The large-load vibration isolator lateral static and dynamic characteristics testing tool according to claim 8, characterized in that: The limiting member includes two limiting rods, one end of the two limiting rods are connected to each other by threads, and the other end of the two limiting rods is provided with a positioning rod with a smaller diameter than the limiting rod, the positioning rod on one of the limiting rods is passed through one of the bearing side plates, and the positioning rod on the other limiting rod is passed through the other bearing side plate.

10. A clamping method for testing the lateral static and dynamic characteristics of a large-load vibration isolator, using the test fixture according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Connect the bearing base to the input ends of the two bearing vibration isolators respectively, and connect the two bearing side plates to the output ends of the two bearing vibration isolators in a one-to-one correspondence; S2. Place the assembled structure obtained in step S1 on a testing machine, with one of the load-bearing side plates facing the actuating end of the testing machine and the other load-bearing side plate facing the non-acting end of the testing machine; S3. Use the testing machine to squeeze the load-bearing side plates and apply load to the two large load-bearing isolators in the load-bearing direction. After reaching the predetermined load, install the stud bolts and tighten the nuts with a torque wrench. S4. Connect the installation base plate to the two load-bearing side plates; S5. Adjust the tooling posture, connect and fix the installation base plate to the non-acting end of the testing machine, and adjust and fix the acting end of the testing machine to the bearing seat.

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