Tool for creep test of vibration and impact isolator

Abstract

The utility model discloses a tool for a creep test of a vibration and impact isolator, which comprises a first counter-force frame and a second counter-force frame which are connected with a testing machine, the first reaction frame and the second reaction frame are connected with a lower pressing plate and an upper pressing plate through two first guide rods and two second guide rods respectively, first through holes are formed in the opposite angles of the lower pressing plate, second through holes are formed in the opposite angles of the upper pressing plate, and the first guide rods penetrate through the upper ends of the second through holes to be connected to the first reaction frame. The second guide rod penetrates through the lower end of the first through hole to be connected to the second reaction frame, a power connecting end is arranged in the middle of the first reaction frame, and tension ends connected with the upper end of the first guide rod are arranged at the two ends of the first reaction frame correspondingly. The lower portion of the lower pressing plate is connected with two grating sensors for monitoring the deformation of the vibration isolator through two oppositely-arranged magnetic attraction bases. According to the utility model, the energy consumption can be reduced, the vibration isolator is prevented from swinging and shaking during compression, the vibration isolator is prevented from being separated from a testing machine, and the safety in the creep test process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of creep test tooling, in particular to a tooling for creep testing of vibration and impact isolators. Background Art

[0002] As the application range of materials becomes wider and wider, creep test has become one of the main performance tests that materials must undergo. Creep test refers to a material mechanical property test that measures the slow plastic deformation of the test material under long-term constant temperature and constant stress. Vibration and shock isolators, also known as "vibration isolators", are elastic elements that connect equipment and foundations to reduce and eliminate the vibration force transmitted from the equipment to the foundation and the vibration transmitted from the foundation to the equipment. Commonly used vibration isolators are metal spring vibration isolators and rubber vibration isolators. Since vibration isolators are always working under load conditions, creep will inevitably occur. Therefore, it is necessary to test the creep performance of the vibration isolators in a compressed state.

[0003] However, when the vibration isolator is subjected to creep test, since the vibration isolator has a large load-bearing capacity, the testing machine needs to adopt a large hydraulic power, resulting in excessive energy consumption. In addition, due to the elastic properties of the vibration isolator itself, the vibration isolator is prone to swing when the testing machine is compressed, which is not conducive to the creep test. At the same time, the vibration isolator is also easy to detach from the testing machine, causing safety hazards. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the creep test of the vibration isolator requires the testing machine to adopt a large hydraulic power, resulting in excessive energy consumption, and the vibration isolator is prone to swing when compressed by the testing machine, which is not conducive to the creep test, and the vibration isolator is easy to detach from the testing machine, causing safety hazards, the utility model provides the following technical solutions.

[0005] The utility model discloses a tooling for creep testing of vibration and impact isolators, comprising a first reaction frame and a second reaction frame which are relatively arranged and have the same structure and are connected to a testing machine, the first reaction frame and the second reaction frame are respectively connected to a lower pressure plate with first through holes diagonally provided and an upper pressure plate with second through holes diagonally provided through at least two first guide rods and at least two second guide rods, the first guide rod passes through the upper end of the second through hole and is connected to the first reaction frame, the second guide rod passes through the lower end of the first through hole and is connected to the second reaction frame, a power connection end connected to the testing machine is provided in the middle of the first reaction frame, and tension ends connected to the upper ends of the first guide rods are provided at both ends of the first reaction frame, positioning components are provided around the upper surface of the lower pressure plate, and two grating sensors for monitoring the deformation of the vibration isolator are connected to the lower part of the lower pressure plate through two relatively arranged magnetic bases.

[0006] As a further technical solution, the tension end is provided with a through hole for the upper end of the first guide rod to pass through, and the upper end of the first guide rod is provided with a first threaded end and a first bolt matching the first threaded end.

[0007] As a further technical solution, the lower end of the second guide rod is provided with a second threaded end passing through the second reaction frame and a second bolt matching the second threaded end.

[0008] As a further technical solution, the lower end of the first guide rod is fixedly connected or threadedly connected to the lower pressing plate.

[0009] As a further technical solution, the lower pressing plate is provided with a positioning screw hole, and the positioning component includes a

[0010] An upper positioning block and a positioning bolt matching the positioning screw hole.

[0011] As a further technical solution, a side of the positioning block facing the middle position of the lower pressing plate is provided with an arc surface to reduce friction on the vibration isolator.

[0012] The utility model has the beneficial effect that the utility model performs creep test on the vibration isolator through the lower pressure plate and the upper pressure plate respectively connected to the first reaction frame and the second reaction frame which are arranged relatively. The testing machine does not need to use a large hydraulic power, but only needs two smaller hydraulic powers to respectively connect the first reaction frame and the second reaction frame, thereby reducing energy consumption. The non-compression space under the lower pressure plate is provided with a magnetic base and a grating sensor, and positioning components are provided around the lower pressure plate. The positioning components can prevent the vibration isolator from swaying when compressed, prevent the vibration isolator from detaching from the testing machine, and improve the safety of the creep test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a tooling for creep testing of a vibration and impact isolator of the utility model;

[0014] Figure 2 It is a schematic diagram of another perspective of the tooling for creep testing of the vibration and shock isolator of the utility model;

[0015] Figure 3 It is a schematic diagram of the structural decomposition of the tooling for creep testing of vibration and shock isolators of the utility model;

[0016] In the figure: 1-first reaction frame; 101-power connection end; 102-tension end; 2-second reaction frame; 3-first guide rod; 301-first threaded end; 4-second guide rod; 401-second threaded end; 5-first bolt; 6-second bolt; 7-lower pressure plate; 701-first through hole; 702-positioning screw hole; 8-upper pressure plate; 801-second through hole; 9-positioning component; 901-positioning block; 902-positioning bolt; 903-arc surface; 10-magnetic base; 11-grating sensor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower" and "both sides" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model is a tooling for creep testing of vibration and shock isolators, which is connected to a testing machine with two hydraulic powers at the upper and lower parts. It includes a first reaction frame 1 and a second reaction frame 2 which are relatively arranged and have the same structure and are connected to the testing machine. The first reaction frame 1 and the second reaction frame 2 have the same structure, so only the first reaction frame 1 is described in detail below. The first reaction frame 1 is a rectangular parallelepiped structure, and a power connection end 101 connected to the hydraulic power of the testing machine is provided in the middle of the first reaction frame 1, and tension ends 102 are provided at both ends of the first reaction frame 1.

[0020] In a preferred embodiment, the first reaction frame 1 and the second reaction frame 2 are respectively connected to a lower pressing plate 7 with a first through hole 701 diagonally provided and an upper pressing plate 8 with a second through hole 801 diagonally provided through two first guide rods 3 and two second guide rods 4. Specifically, the upper ends of the two first guide rods 3 passing through the two second through holes 801 are respectively connected to the two tension ends 102 of the first reaction frame 1, and the lower ends of the two second guide rods 4 passing through the two first through holes 701 are connected to the second reaction frame 2 at the same position as the two tension ends 102 of the first reaction frame 1. The lower end of the first guide rod 3 is fixedly connected or threadedly connected to the lower pressing plate 7, and at the same time, the upper end of the second guide rod 4 is fixedly connected or threadedly connected to the upper pressing plate 8. When in use, the two hydraulic powers of the testing machine pull the first reaction frame 1 and the second reaction frame 2 simultaneously, and the first reaction frame 1 and the second reaction frame 2 drive the lower pressure plate 7 and the upper pressure plate 8 to move toward each other, compressing the vibration isolator placed between the lower pressure plate 7 and the upper pressure plate 8, and then detecting its creep deformation.

[0021] In a preferred embodiment, the tension end 102 is provided with a through hole for the upper end of the first guide rod 3 to pass through, and the upper end of the first guide rod 3 is provided with a first threaded end 301 and a first bolt 5 matching the first threaded end 301. The first threaded end 301 can freely penetrate into or out of the through hole of the tension end 102, and the first bolt 5 is located above the tension end 102 and is threadedly connected to the first threaded end 301. Similarly, the lower end of the second guide rod 4 is provided with a second threaded end 401 that passes through the second reaction frame 2 and a second bolt 6 matching the second threaded end 401. The second threaded end 401 can freely penetrate into or out of the through hole of the second reaction frame 2, and the second bolt 6 is located below the second reaction frame 2 and is threadedly connected to the second threaded end 401.

[0022] In a preferred embodiment, the non-compression space at the bottom of the lower pressure plate 7 is connected to two grating sensors 11 for monitoring the deformation of the vibration isolator through two magnetic bases 10 arranged opposite to each other. The two grating sensors 11 are arranged opposite to each other to monitor the deformation of the vibration isolator from both sides of the vibration isolator. In order to prevent the vibration isolator from shaking, positioning components 9 are arranged around the upper surface of the lower pressure plate 7. The positioning components 9 are arranged around the vibration isolator. Specifically, the lower pressure plate 7 is provided with multiple rows of positioning screw holes 702 extending from the edge of the lower pressure plate 7 to the center. The positioning component 9 includes a positioning block 901 with a through hole or a threaded hole installed on the upper part of the lower pressure plate 7 and a positioning bolt 902 matching the positioning screw hole 702. The positioning bolt 902 passes through the threaded hole or through hole of the positioning block 901 and is threadedly connected to the positioning screw hole 702 to fix the positioning block 901 to the upper part of the lower pressure plate 7. A side of the positioning block 901 facing the middle of the lower pressing plate 7 is provided with an arc surface 903 to reduce friction on the vibration isolator and prevent the positioning block 901 from affecting the creep test accuracy of the vibration isolator.

[0023] When the utility model is in use, the two hydraulic powers of the testing machine are connected to the first reaction frame 1 and the second reaction frame 2 at the same time, the vibration isolator is placed on the upper part of the lower pressure plate 7, and the positioning component 9 is operated, the positioning block 901 is matched to the positioning screw hole 702 of the appropriate distance, so that the positioning component 9 limits the vibration isolator and corrects the position of the grating sensor 11. Then, the hydraulic power of the testing machine is started, so that the first reaction frame 1 and the second reaction frame 2 drive the lower pressure plate 7 and the upper pressure plate 8 to move toward each other, compress the vibration isolator placed between the lower pressure plate 7 and the upper pressure plate 8, and load it to the rated load. Then, the ambient temperature and the value of the grating sensor are detected at regular intervals, and the creep value of the vibration isolator is recorded.

[0024] The preferred specific implementation modes and embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation modes and embodiments, and various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.

Claims

1. A tool for creep testing of vibration and shock isolators, characterized in that: The invention comprises a first reaction frame (1) and a second reaction frame (2) which are arranged opposite to each other and have the same structure and are connected to a testing machine. The first reaction frame (1) and the second reaction frame (2) are respectively connected to a lower pressing plate (7) having a first through hole (701) and an upper pressing plate (8) having a second through hole (801) diagonally provided thereon through at least two first guide rods (3) and at least two second guide rods (4). The first guide rod (3) passes through the upper end of the second through hole (801) and is connected to the first reaction frame (1). The second guide rod (4) is connected to the lower pressing plate (7) and the second through hole (801) through the upper end of the second through hole (801). (4) The lower end passing through the first through hole (701) is connected to the second reaction frame (2), the first reaction frame (1) is provided with a power connection end (101) connected to the testing machine in the middle, and both ends of the first reaction frame (1) are provided with a tension end (102) connected to the upper end of the first guide rod (3), the upper surface of the lower pressure plate (7) is provided with a positioning component (9) around it, and the lower part of the lower pressure plate (7) is connected to two grating sensors (11) for monitoring the deformation of the vibration isolator through two magnetic bases (10) arranged opposite to each other.

2. The creep test fixture for vibration and shock isolators according to claim 1, characterized in that: The tension end (102) is provided with a through hole for the upper end of the first guide rod (3) to pass through, and the upper end of the first guide rod (3) is provided with a first threaded end (301) and a first bolt (5) matching the first threaded end (301).

3. The creep test fixture for vibration and shock isolators according to claim 1, characterized in that: The lower end of the second guide rod (4) is provided with a second threaded end (401) passing through the second reaction frame (2) and a second bolt (6) matching the second threaded end (401).

4. The creep test fixture for vibration and shock isolators according to claim 1, characterized in that: The lower end of the first guide rod (3) is fixedly connected or threadedly connected to the lower pressing plate (7).

5. The creep test fixture for vibration and shock isolators according to claim 1, characterized in that: The lower pressing plate (7) is provided with a positioning screw hole (702), and the positioning component (9) comprises a positioning block (901) installed on the upper part of the lower pressing plate (7) and a positioning bolt (902) matching the positioning screw hole (702).

6. The creep test fixture for vibration and shock isolators according to claim 5, characterized in that: A side of the positioning block (901) facing the middle position of the lower pressing plate (7) is provided with an arc-shaped surface (903) to reduce friction on the vibration isolator.

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