Hydraulic vibration test device

Abstract

The utility model provides a hydraulic vibration test device which comprises a working table, a hydraulic vibration exciter used for driving the working table to vibrate and a servo valve assembly used for supplying oil to the hydraulic vibration exciter, and the servo valve assembly comprises at least two kinds of servo valves. And at least one servo valve is a high-flow servo valve, and the other servo valve is a high-frequency servo valve. The hydraulic vibration test device can meet two test requirements of large flow and high frequency, the servo valve does not need to be dismounted and replaced, the test period is not influenced, the production efficiency is not reduced, and the cleanness of an oil path can be ensured.

Description

Technical Field

[0001] The utility model relates to a hydraulic vibration testing device. Background Art

[0002] It is difficult for existing vibration tables to simultaneously meet the application requirements of large flow and high frequency. The closest implementation method is to select a large flow servo valve when low frequency and high speed conditions are required, and replace it with a high frequency servo valve when high frequency conditions are required. The disadvantage of this solution is that the servo valve and the valve plate that matches it need to be disassembled and assembled. After each disassembly, the oil circuit needs to be re-flushed to ensure the cleanliness of the oil circuit, which seriously affects the test cycle and reduces production efficiency. In addition, multiple disassembly and assembly of the servo valve and valve block will increase the failure of the servo valve and the matching accuracy of the valve plate and the oil cylinder, causing the risk of oil leakage.

[0003] In view of this, it is necessary to improve the existing hydraulic vibration test device to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a hydraulic vibration test device to solve the problem that the existing vibration table is difficult to meet the two working requirements of large flow and high frequency.

[0005] To achieve the above-mentioned purpose, the utility model provides a hydraulic vibration testing device, which includes a work surface, a hydraulic exciter for driving the work surface to vibrate, and a servo valve assembly for supplying oil to the hydraulic exciter, wherein the servo valve assembly includes at least two servo valves, and at least one of them is a large-flow servo valve and the other is a high-frequency servo valve.

[0006] As a further improvement of the present utility model, the number of the large-flow servo valves is two, and the number of the high-frequency servo valves is two.

[0007] As a further improvement of the present invention, the large-flow servo valve includes a large-flow valve seat and a large-flow valve body arranged on the large-flow valve seat, the high-frequency servo valve includes a high-frequency valve seat and a high-frequency valve body arranged on the high-frequency valve seat, the two large-flow servo valves are arranged on opposite sides of the hydraulic exciter, and the two high-frequency servo valves are arranged on opposite sides of the hydraulic exciter.

[0008] As a further improvement of the utility model, the large-flow servo valve has a large-flow oil inlet and a large-flow oil return port, and the large-flow oil inlet and the large-flow oil return port are arranged on the left and right sides of the large-flow valve seat, and the high-frequency servo valve has a high-frequency oil inlet and a high-frequency oil return port, and the high-frequency oil inlet and the high-frequency oil return port are arranged at the bottom of the high-frequency valve seat.

[0009] As a further improvement of the present utility model, the number of large-flow oil inlets and large-flow oil outlets of each of the large-flow servo valves is greater than the number of high-frequency oil inlets and high-frequency oil outlets of each of the high-frequency servo valves.

[0010] As a further improvement of the present utility model, the hydraulic vibration test device further includes a base for supporting the hydraulic vibrator, an oil inlet valve seat and an oil return valve seat arranged on the base, and the oil inlet valve seat and the oil return valve seat are connected to the servo valve through oil pipes.

[0011] As a further improvement of the present utility model, the hydraulic vibrator includes a support fixed to the base, a cylinder body fixedly connected to the support, an adapter fixed to the workbench surface, and a piston rod arranged in the cylinder body and connected to the adapter.

[0012] As a further improvement of the present utility model, the cylinder body is provided with an oil inlet and an oil return port for communicating with the servo valve. Each servo valve is correspondingly provided with at least one set of oil inlet and oil return ports, and the oil inlet and the oil return port are arranged at intervals in the height direction.

[0013] As a further improvement of the present utility model, the hydraulic vibrator further includes guide sleeves arranged at both ends of the cylinder body, and the piston rod axially passes through the guide sleeves.

[0014] As a further improvement of the present utility model, the workbench surface includes a fixed part fixedly connected to the hydraulic vibrator, a circular main rib surrounding the fixed part, and a reinforcing rib arranged radially around the circular main rib.

[0015] The beneficial effects of the present utility model are as follows: The hydraulic vibration test device of the present utility model can meet the two test requirements of large flow and high frequency, and does not require the removal and replacement of the servo valve, which will not affect the test cycle and reduce the production efficiency, and can ensure the cleanliness of the oil circuit. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the hydraulic vibration test device of the present utility model;

[0017] Figure 2 is the structural schematic diagram of the workbench surface of the hydraulic vibration test device of the present utility model;

[0018] Figure 3 is Figure 2 the structural schematic diagram of another angle of the workbench surface of

[0019] Figure 4 is the partial sectional structural schematic diagram of the hydraulic vibrator and the servo valve assembly of the hydraulic vibration test device of the present utility model;

[0020] Figure 5 It is a schematic partial sectional view of the cylinder block of the hydraulic vibration test device of the present utility model;

[0021] Figure 6 It is a schematic structural view of the large-flow servo valve of the hydraulic vibration test device of the present utility model;

[0022] Figure 7 is Figure 6 Another perspective structural view of the large-flow servo valve in

[0023] Figure 8 It is a schematic structural view of the high-frequency servo valve of the hydraulic vibration test device of the present utility model. Specific embodiments

[0024] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] Such as Figures 1 to 8As shown in the figure, the hydraulic vibration test device 100 of the present utility model includes a workbench surface 1, a hydraulic vibrator 2 for driving the vibration of the workbench surface 1, a servo valve assembly 3 for supplying oil to the hydraulic vibrator 2, a base 4 for supporting the hydraulic vibrator 2, an oil inlet valve seat 5 and an oil return valve seat 6 provided on the base 4.

[0028] As Figure 2 and Figure 3 shown in the figure, the workbench surface 1 includes a table surface part 11, a fixing part 12 fixedly connected to the hydraulic vibrator 2, a circular main rib 13 surrounding the fixing part 12, and reinforcing ribs 14 arranged radially around the circular main rib 13.

[0029] Among them, the table surface part 11 is in a plate shape for installing the specimen to be tested. The fixing part 12 is integrally formed with the table surface part 11, and the hydraulic vibrator 2 and the table surface part 11 are fixedly connected by screws, so that the hydraulic vibrator 2 drives the table surface part 11 to move.

[0030] The circular main rib 13 is arranged around the fixing part 12 to support the fixing part 12. The number of the reinforcing ribs 14 is multiple to improve the overall connection strength of the workbench surface 1.

[0031] As Figure 4 and Figure 5 shown in the figure, in this embodiment, the hydraulic vibrator 2 includes a support 21 fixed to the base 4, a cylinder block 22 fixedly connected to the support 21, an adapter 23 fixed to the workbench surface 1, a piston rod 24 arranged in the cylinder block 22 and connected to the adapter 23, a displacement sensor 25 for detecting the moving position of the piston rod 24, and guide sleeves 26 arranged at both ends of the cylinder block 22.

[0032] The piston rod 24 axially passes through the guide sleeves 26, and the guide sleeves 26 can play the role of preventing oil leakage.

[0033] The cylinder block 22 is in a cuboid shape and has four outer walls, and the servo valve is fixed on the outer wall of the cylinder block 22.

[0034] As Figures 6 to 8 shown in the figure, in this embodiment, the servo valve assembly 3 includes at least two types of servo valves, and at least one of them is a large-flow servo valve 31 and one is a high-frequency servo valve 32.

[0035] When the large-flow servo valve 31 works, it can meet the requirement that the 50T dynamic hydraulic vibrator 2 reaches a speed of 4m / s, that is, high-speed sinusoidal vibration. When the high-frequency servo valve 32 works, it can meet the high-frequency sinusoidal vibration of the dynamic hydraulic vibrator 2.

[0036] The oil inlet valve seat 5 and the oil return valve seat 6 are connected to the servo valve through an oil pipe 7.

[0037] There are two large-flow servo valves 31 and two high-frequency servo valves 32. The two large-flow servo valves 31 are arranged on opposite sides of the hydraulic vibrator 2, and the two high-frequency servo valves 32 are arranged on opposite sides of the hydraulic vibrator 2.

[0038] The large-flow servo valve 31 includes a large-flow valve seat 311 and a large-flow valve body 312 arranged on the large-flow valve seat 311. The high-frequency servo valve 32 includes a high-frequency valve seat 321 and a high-frequency valve body 322 arranged on the high-frequency valve seat 321.

[0039] Both the large-flow valve seat 311 and the high-frequency valve seat 321 are rectangular parallelepipeds, and the height is greater than the width.

[0040] The large-flow servo valve 31 has a large-flow oil inlet 313 and a large-flow oil return 314. The large-flow oil inlet 313 and the large-flow oil return 314 are arranged on the left and right sides of the large-flow valve seat 311. The high-frequency servo valve 32 has a high-frequency oil inlet 323 and a high-frequency oil return 324. The high-frequency oil inlet 323 and the high-frequency oil return 324 are arranged at the bottom of the high-frequency valve seat 321.

[0041] The number of the large-flow oil inlets 313 and the large-flow oil returns 314 of each large-flow servo valve 31 is greater than the number of the high-frequency oil inlets 323 and the high-frequency oil returns 324 of each high-frequency servo valve 32.

[0042] In this embodiment, one large-flow servo valve 31 is correspondingly provided with four large-flow oil inlets 313 and four large-flow oil returns 314. More large-flow oil inlets 313 and large-flow oil returns 314 can allow more hydraulic oil to pass through to achieve the purpose of large-flow drive. The large-flow oil inlets 313 and the large-flow oil returns 314 are arranged on the side of the large-flow valve seat 311 because there is more space on the side. Correspondingly, one large-flow servo valve 31 is correspondingly provided with a set of high-frequency oil inlets 323 and high-frequency oil returns 324.

[0043] In this embodiment, the number of both the oil inlet valve seat 5 and the oil return valve seat 6 is five. Each oil inlet valve seat 5 and oil return valve seat 6 is connected to two oil pipes 7. Four groups of the oil inlet valve seat 5 and the oil return valve seat 6 are connected to the large-flow servo valve 31, and the other group of the oil inlet valve seat 5 and the oil return valve seat 6 is connected to the high-frequency servo valve 32.

[0044] One of the high-frequency servo valves 32 is correspondingly provided with two high-frequency oil inlets 323 and two high-frequency oil outlets 324. The fewer high-frequency oil inlets 323 and high-frequency oil outlets 324 can achieve the purpose of high-frequency drive. The high-frequency oil inlets 323 and high-frequency oil outlets 324 are both arranged at the bottom edge of the high-frequency valve seat 321 to facilitate connection with the oil pipe 7.

[0045] An oil inlet 221 and an oil outlet 222 for communicating with the servo valve assembly 3 are provided on the cylinder block 22. Each servo valve assembly 3 is correspondingly provided with at least one set of oil inlet 221 and oil outlet 222. The oil inlet 221 and the oil outlet 222 are arranged at intervals in the height direction.

[0046] In this embodiment, one servo valve assembly 3 is correspondingly provided with one set of oil inlet 221 and oil outlet 222. An oil inlet 221 and an oil outlet 222 are provided on one outer wall of the cylinder block 22.

[0047] When the hydraulic vibration test device 100 of the present utility model needs low-frequency, high-speed and large-flow vibration, at this time, the two groups of high-frequency servo valves 32 are not connected to signals, and only the two groups of large-flow servo valves 31 function. The four groups of the corresponding oil inlet valve seats 5 and the oil return valve seats 6 meet the demand for large flow. When the hydraulic vibration test device 100 of the present utility model needs high-frequency vibration, at this time, the required flow is small, the two groups of large-flow servo valves 31 are not connected to signals, and only the two groups of high-frequency servo valves 32 function. The two groups of the corresponding oil inlet valve seats 5 and the oil return valve seats 6 meet the demand for small flow.

[0048] The hydraulic vibration test device 100 of the present utility model can meet the two test requirements of large flow and high frequency, and does not need to remove and replace the servo valve, which will not affect the test cycle and reduce the production efficiency, and can ensure the cleanliness of the oil circuit.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0050] The above-described embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A hydraulic vibration test device, characterized in that: The hydraulic vibration test device includes a workbench surface, a hydraulic vibrator for driving the vibration of the workbench surface, and a servo valve assembly for supplying oil to the hydraulic vibrator. The servo valve assembly includes at least two types of servo valves, and at least one of them is a large-flow servo valve and one is a high-frequency servo valve.

2. The hydraulic vibration test device according to claim 1, wherein: The number of the large-flow servo valves is two, and the number of the high-frequency servo valves is two.

3. The hydraulic vibration test device according to claim 2, wherein: The large-flow servo valve includes a large-flow valve seat and a large-flow valve body arranged on the large-flow valve seat. The high-frequency servo valve includes a high-frequency valve seat and a high-frequency valve body arranged on the high-frequency valve seat. The two large-flow servo valves are arranged on opposite sides of the hydraulic vibrator, and the two high-frequency servo valves are arranged on opposite sides of the hydraulic vibrator.

4. The hydraulic vibration test device according to claim 3, characterized in that: The large-flow servo valve has a large-flow oil inlet and a large-flow oil return port. The large-flow oil inlet and the large-flow oil return port are arranged on the left and right sides of the large-flow valve seat. The high-frequency servo valve has a high-frequency oil inlet and a high-frequency oil return port. The high-frequency oil inlet and the high-frequency oil return port are arranged at the bottom of the high-frequency valve seat.

5. The hydraulic vibration test device according to claim 4, characterized in that: The number of the large-flow oil inlets and large-flow oil return ports of each large-flow servo valve is greater than the number of the high-frequency oil inlets and high-frequency oil return ports of each high-frequency servo valve.

6. The hydraulic vibration test device according to claim 1, wherein: The hydraulic vibration test device further includes a base for supporting the hydraulic vibrator, an oil inlet valve seat and an oil return valve seat arranged on the base. The oil inlet valve seat and the oil return valve seat are connected to the servo valve through oil pipes.

7. The hydraulic vibration test device according to claim 6, wherein: The hydraulic vibrator includes a support fixed to the base, a cylinder body fixedly connected to the support, an adapter fixed to the workbench surface, and a piston rod arranged in the cylinder body and connected to the adapter.

8. The hydraulic vibration test device according to claim 7, characterized in that: The cylinder body is provided with an oil inlet and an oil return port for communicating with the servo valve. Each servo valve is correspondingly provided with at least one set of oil inlet and oil return ports, and the oil inlet and the oil return port are arranged at intervals in the height direction.

9. The hydraulic vibration test device according to claim 7, wherein: The hydraulic vibrator further includes guide sleeves arranged at both ends of the cylinder body, and the piston rod axially passes through the guide sleeves.

10. The hydraulic vibration test device according to claim 1, wherein: The workbench surface includes a fixed part fixedly connected to the hydraulic vibrator, a circular main rib surrounding the fixed part, and reinforcing ribs arranged radially around the circular main rib.

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