Guiding device for expansion table top of low-pressure four-integrated system

Abstract

The utility model provides a guiding device for an expansion table top of a low-pressure four-integrated system, which comprises at least two guiding assemblies which are uniformly distributed in the circumferential direction, and the guiding assemblies are arranged between the expansion table top and a vibration exciter support or between the expansion table top and a working table. The guiding assembly comprises a guiding shaft and a guiding shaft sleeve which are coaxially connected, the guiding shaft is arranged in the guiding shaft sleeve in a sliding mode, the guiding shaft sleeve is used for guiding the vertical movement of the guiding shaft, and a second through hole which is through and allows the guiding assembly to penetrate through is formed in the test box; a second flexible sealing mechanism is arranged between the guide assembly and the test box for sealing; the test box is simple in structure, the complexity of the system is not obviously increased, the bearing capacity of the system is improved, the maximum anti-overturning moment of the system is greatly enhanced, it is ensured that the test box is not affected by vibration when a test is conducted, the sealing performance of the test box is ensured, and it is ensured that a comprehensive test can be conducted stably and safely.

Description

TECHNICAL FIELD

[0001] The utility model relates to vibration test technical field, concretely relates to a kind of guiding device for the extension platform of low pressure four comprehensive system. BACKGROUND

[0002] Low pressure four comprehensive test system is a powerful, highly integrated test equipment, can simulate complex environmental conditions, the performance of product in extreme environment is comprehensively evaluated. By introducing guiding device and other innovative technologies, the stability and reliability of the system can be further improved, and strong support is provided for product research and development and quality control in the fields of aviation, aerospace, military industry, electronics, etc.

[0003] The existing vibration table part in low pressure four comprehensive test system, including vibration table body, adapter, extension platform and other key parts, among them, the anti-unbalance load performance (i.e. the ability to resist overturning moment) of extension platform currently mainly depends on the guiding mechanism of vibration table itself, and the upper limit value is relatively low. Specifically, the maximum anti-overturning moment of the whole system = the anti-overturning moment of vibration table body, which fundamentally limits the space for improving anti-overturning moment. In actual application, when the system needs to carry large size, large weight or unbalanced weight distribution test samples, and under the test condition of high vibration acceleration, the anti-unbalance load capacity of the system may not meet the use requirements, so that stability problems are more likely to occur. SUMMARY

[0004] The utility model aims at providing a kind of guiding device for the extension platform of low pressure four comprehensive system to solve the above problems.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A kind of guiding device for the extension platform of low pressure four comprehensive system, the low pressure four comprehensive system includes exciter, exciter support, extension platform and test box, the exciter is installed on exciter support, the extension platform can be inducted into test box and do reciprocating motion, the guiding device includes at least two circumferentially distributed guiding components, the guiding component is arranged between extension platform and exciter support, or the guiding component is arranged between extension platform and workbench, the guiding component includes coaxially connected guiding shaft and guiding sleeve, the guiding shaft is slidably arranged in guiding sleeve, the guiding sleeve is used to guide the up-down movement of guiding shaft, a second through hole is formed in the test box, which can be passed through by the guiding component, a second flexible sealing mechanism is arranged between the guiding component and the test box for sealing.

[0007] As a further improved technical scheme of the utility model, in the radial direction, there is a gap between the inner circular wall of the guiding sleeve and the guiding shaft.

[0008] As a further improved technical scheme of the utility model, a support column is arranged between the guide assembly and the exciter support, or a support column is arranged between the guide assembly and the workbench, and the support column, the guide shaft and the guide shaft sleeve are coaxially arranged.

[0009] As a further improved technical scheme of the utility model, in the radial direction, a gap exists between the outer cylindrical wall of the support column and the second through hole.

[0010] As a further improved technical scheme of the utility model, in the axial direction, the distance between the guide shaft sleeve and the extended table is greater than half of the vibration amplitude of the extended table and less than the vibration amplitude of the extended table, or the distance between the guide shaft sleeve and the support column is greater than half of the vibration amplitude of the extended table and less than the vibration amplitude of the extended table.

[0011] As a further improved technical scheme of the utility model, the guide shaft sleeve is arranged between the guide shaft and the support column.

[0012] As a further improved technical scheme of the utility model, the guide shaft is arranged between the guide shaft sleeve and the support column.

[0013] As a further improved technical scheme of the utility model, the guide assembly has three or four.

[0014] As a further improved technical scheme of the utility model, the second flexible sealing mechanism comprises an annular pressing ring and a flexible sealing piece, the flexible sealing piece is annular, the inner ring of the flexible sealing piece is connected to the support column, and the annular pressing ring presses the outer ring of the flexible sealing piece against the inner wall of the test box.

[0015] As a further improved technical scheme of the utility model, an annular clamping groove is formed in the support column, the inner ring of the flexible sealing piece is arranged in the annular clamping groove, and the groove bottom width d of the annular clamping groove is greater than the slot width D of the annular clamping groove.

[0016] The utility model has the beneficial effects that:

[0017] Through the above structure, in combination with the guide shaft, the guide shaft sleeve and the second flexible sealing structure, the structure is simple, the system complexity is not significantly increased, the bearing capacity of the system is improved, the maximum overturning moment of the system is greatly enhanced, the test box is ensured not to be affected by vibration during testing, the sealing performance of the test box is ensured, and the comprehensive test can be ensured to be stable and safe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of an embodiment of a guide device;

[0019] Figure 2 is Figure 1 is

[0020] Wherein: 1-vibrator, 2-vibrator support, 3-adapter, 4-extension table, 5-test box, 6-first flexible sealing mechanism, 7-guide shaft, 8-guide shaft sleeve, 9-second flexible sealing mechanism, 901-annular pressing ring, 902-flexible sealing element, 903-fastener, 10-support column. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below in combination with the specific embodiments shown in the drawings. However, these embodiments do not limit the utility model, and the changes in structure, method or function made by those skilled in the art based on these embodiments are all included in the protection scope of the utility model.

[0022] If the utility model involves orientation (for example, up, down, left, right, front, back, outside, inside, etc.) when expressing, the orientation involved needs to be defined, for example, "for the purpose of clearly expressing the position and direction described in the utility model, the operator of the instrument is taken as the reference, the end close to the operator is the proximal end, and the end far away from the operator is the distal end." Or the paper surface is taken as the reference for definition. Of course, if the position relationship between the two is defined by mutual reference in the subsequent description, it can not be defined here.

[0023] A guide device for an extension table of a low-pressure four-combined system, as shown in Figure 1 The low-pressure four-combined system includes a vibrator 1, a vibrator support 2, an adapter 3, an extension table 4 and a test box 5. The vibrator 1 is installed on the vibrator support 2. The adapter 3 connects the vibrator 1 and the extension table 4. The adapter 3 is used to transmit the vibration force generated by the vibrator 1 to the extension table 4. The extension table 4 and the adapter 3 extend into the test box 5. A first through hole is formed in the test box 5. The adapter 3 can do reciprocating motion in the first through hole. A first flexible sealing mechanism 6 is arranged between the adapter 3 and the test box 5 to seal.

[0024] As shown in Figure 1As shown, the guide device comprises at least two circumferentially distributed guide assemblies, which are arranged between the extension table 4 and the vibrator support 2 or between the extension table 4 and the workbench, and each guide assembly comprises a guide shaft 7 and a guide sleeve 8 coaxially connected together, the guide shaft 7 is slidably arranged in the guide sleeve 8, and the guide sleeve 8 is used for guiding the up-down movement of the guide shaft 7; a second through hole is formed in the test box 5 and can be passed through by the guide assembly; a second flexible sealing mechanism 9 is arranged between the guide assembly and the test box 5 to seal, so that the test box 5 is sealed, and the guide assembly and the test box 5 are not hard connected. During the comprehensive test, the guide shaft 7 and the guide sleeve 8 guide the vibration of the low-pressure four-combined test system, improve the maximum anti-overturning moment of the low-pressure four-combined test system, and maintain the stability of the vibration.

[0025] In the radial direction, there is a gap between the inner circular wall of the guide sleeve 8 and the guide shaft 7, and the test box 5 is not affected by vibration during the test.

[0026] As an embodiment of the utility model, in order to improve the stability of system vibration, a support column 10 is arranged between the guide assembly and the vibrator support 2 or between the guide assembly and the workbench, and the workbench is the table on which the low-pressure four-combined system is placed; on the one hand, based on the vibration amplitude of the system, the guide distance of vibration does not need to be very long, but a relatively appropriate guide distance is needed, therefore, the support column 10 is arranged to shorten the guide distance; on the other hand, the support column 10 is arranged to support the extension table 4 and improve the carrying capacity of the system.

[0027] As an embodiment of the utility model, the support column 10, the guide shaft 7 and the guide sleeve 8 are coaxially arranged; in the radial direction, there is a gap between the outer circular wall of the support column 10 and the second through hole; in the axial direction, there is a certain safety distance between the guide sleeve 8 and the extension table 4 or the support column 10, which is usually more than half of the vibration amplitude of the extension table 4, that is, the distance between the guide sleeve 8 and the extension table 4 is greater than half of the vibration amplitude of the extension table 4 and less than the vibration amplitude of the extension table 4, or the distance between the guide sleeve 8 and the support column 10 is greater than half of the vibration amplitude of the extension table 4 and less than the vibration amplitude of the extension table 4.

[0028] As an embodiment of the utility model, the guide sleeve 8 is arranged between the guide shaft 7 and the support column 10. As another embodiment of the utility model, the guide shaft 7 is arranged between the guide sleeve 8 and the support column 10.

[0029] As an embodiment of the utility model, the guiding assembly has three or four, and has good stability effect on vibration and anti-unbalanced load capacity of the extension table 4.

[0030] As an embodiment of the utility model, as shown in Figure 2 The second flexible sealing mechanism 9 includes an annular pressing ring 901 and a flexible sealing piece 902, the flexible sealing piece 902 is annular, the inner ring of the flexible sealing piece 902 is connected on the support column 10, the annular pressing ring 901 presses the outer ring of the flexible sealing piece 902 on the inner wall of the test box 5, and a fastener 903 is arranged between the annular pressing ring 901 and the inner wall of the test box 5 and is connected.The inner ring diameter of the annular pressing ring 901 is greater than the diameter of the support column 10.A ring-shaped clamping groove is formed in the support column 10, and the inner ring of the flexible sealing piece 902 is arranged in the ring-shaped clamping groove.The groove bottom width d of the ring-shaped clamping groove is greater than the slot width D of the ring-shaped clamping groove.The flexible sealing piece 902 reduces the gap between the annular pressing ring 901, the support column 10 and the test box 5, the second flexible sealing mechanism 9 improves the sealing between the support column 10 and the test box 5, and ensures the precision of the vibration test.As an embodiment of the utility model, the flexible sealing piece 902 is made of rubber elastic cloth, and the rubber elastic cloth has good elasticity, stretchability, wear resistance and corrosion resistance, is suitable for different installation and use environments, and has long service life.

[0031] The guiding device for the extension table of the low-pressure four-combined system has simple structure, greatly enhances the maximum anti-overturning moment of the system under the premise of not significantly increasing the complexity of the system, ensures that the combined test can be carried out stably and safely under certain test conditions, there is no hard connection between the test box 5, and the test box 5 can be completely independent and is not affected by vibration when various performance tests are carried out, the purity and accuracy of test data are ensured, and the flexible sealing connection between the test box 5 maintains the integrity of the internal environment of the test box 5, and the sealing performance of the test box 5 is always consistent under different pressure, temperature and other test conditions.

[0032] It should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0033] The series of detailed descriptions listed above are only specific descriptions for the feasible implementation manners of the present application, and are not used to limit the protection scope of the present application. Any equivalent implementation manners or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A guiding device for an extension table of a low-pressure four-synthetic system, the low-pressure four-synthetic system comprising a vibration exciter (1), a vibration exciter support (2), an extension table (4) and a test box (5), the vibration exciter (1) being mounted on the vibration exciter support (2), the extension table (4) being capable of reciprocating into the test box (5), characterized in that: the guiding device comprises at least two circumferentially distributed guiding assemblies, the guiding assemblies being arranged between the extension table (4) and the vibration exciter support (2) or between the extension table (4) and a workbench, the guiding assemblies comprising a guiding shaft (7) and a guiding sleeve (8) coaxially connected, the guiding shaft (7) being slidably arranged in the guiding sleeve (8), the guiding sleeve (8) being used for guiding the up-and-down movement of the guiding shaft (7), a second through hole being formed in the test box (5) for the guiding assemblies to pass through, and a second flexible sealing mechanism (9) being arranged between the guiding assemblies and the test box (5) for sealing.

2. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 1, characterized in that: in the radial direction, there is a gap between the inner circular wall of the guiding sleeve (8) and the guiding shaft (7).

3. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 1, characterized in that: a support column (10) is arranged between the guiding assemblies and the vibration exciter support (2) or between the guiding assemblies and the workbench, the support column (10), the guiding shaft (7) and the guiding sleeve (8) being coaxially arranged.

4. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 3, characterized in that: in the radial direction, there is a gap between the outer circular wall of the support column (10) and the second through hole.

5. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 3, characterized in that: in the axial direction, the distance between the guiding sleeve (8) and the extension table (4) is greater than half of the vibration amplitude of the extension table (4) and less than the vibration amplitude of the extension table (4), or the distance between the guiding sleeve (8) and the support column (10) is greater than half of the vibration amplitude of the extension table (4) and less than the vibration amplitude of the extension table (4).

6. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 3, characterized in that: the guiding sleeve (8) is arranged between the guiding shaft (7) and the support column (10).

7. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 3, characterized in that: the guiding shaft (7) is arranged between the guiding sleeve (8) and the support column (10).

8. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 1, characterized in that: the guiding assemblies are three or four.

9. The guiding device for the extension table of the low-pressure four-synthetic system according to claim 3, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ The second flexible sealing mechanism (9) comprises an annular pressing ring (901) and a flexible sealing piece (902), the flexible sealing piece (902) is annular, the inner ring of the flexible sealing piece (902) is connected on the support column (10), and the annular pressing ring (901) presses the outer ring of the flexible sealing piece (902) on the inner wall of the test box (5).

10. The guide device for the extended platform of the low-pressure four-combined system according to claim 9, characterized in that: An annular clamping groove is formed on the support column (10), the inner ring of the flexible sealing piece (902) is arranged in the annular clamping groove, and the groove bottom width d of the annular clamping groove is greater than the slot opening width D of the annular clamping groove.

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