Expansion table board auxiliary supporting device for low-pressure four-integrated system

Abstract

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

Description

TECHNICAL FIELD

[0001] The utility model relates to vibration test technical field, concretely relates to an extension mesa auxiliary support device for low pressure four comprehensive system. BACKGROUND

[0002] Low pressure four comprehensive test system is a powerful, highly integrated test equipment, which can simulate complex environmental conditions and comprehensively evaluate the performance of products in extreme environments. By introducing innovative technologies such as extension mesa auxiliary support device, the stability and reliability of the system can be further improved, providing strong support for product research and development and quality control in the fields of aviation, aerospace, military industry and electronics.

[0003] The existing low pressure four comprehensive test system includes a vibration table body, an adapter, an extension mesa and other key parts, and the maximum load capacity of the whole system is strictly limited by the load capacity of the vibration table. Specifically, the maximum load of the system = the maximum bearing capacity of the vibration table body - the weight of the adapter - the weight of the extension mesa. For the same type of vibration table, the maximum bearing capacity of the table body and the weight of the adapter are often preset and constant, so the weight of the extension mesa affects the maximum load of the system. In actual application, as the volume of the test piece increases, the size of the extension mesa also needs to be enlarged to meet the testing requirements, and the weight of the extension mesa also increases. This change further compresses the limited load capacity of the system, making the testing of large-size and heavy-weight test pieces a difficult problem, and forming a prominent contradiction between load capacity and test piece size and weight. At the same time, the anti-offset load capacity (anti-overturning moment) of the extension mesa currently mainly depends on the guiding structure of the vibration table, and the upper limit is low. This design limits the improvement space of the anti-overturning moment, making the system more prone to stability problems when facing large-size and unevenly distributed weight test pieces. SUMMARY

[0004] The utility model aims at providing an extension mesa auxiliary support device for low pressure four comprehensive system to solve the above problems.

[0005] The utility model adopts the technical scheme of:

[0006] The application discloses an auxiliary support device for an extended table of a low-pressure four-combination system, and belongs to the technical field of low-pressure four-combination systems.

[0007] As a further improved technical scheme of the application, the air spring is fixed on the extended table, and the end of the guide shaft away from the air spring is fixed on the vibrator support.

[0008] As a further improved technical scheme of the application, the air spring is fixed on the extended table, and the end of the guide shaft away from the air spring is fixed on the workbench.

[0009] As a further improved technical scheme of the application, the end of the guide shaft away from the air spring is fixed on the extended table, and a support seat is arranged on the vibrator support, and the air spring is arranged in the support seat.

[0010] As a further improved technical scheme of the application, a guide shaft sleeve is arranged on the upper portion of the support seat, the guide shaft is arranged in the guide shaft sleeve, and the guide shaft sleeve is used for guiding the up-and-down movement of the guide shaft.

[0011] As a further improved technical scheme of the application, in the radial direction, a gap exists between the outer wall of the guide shaft sleeve and the second through hole.

[0012] As a further improved technical scheme of the application, the air spring is at least two and arranged in an axial stack.

[0013] As a further improved technical scheme of the application, the second flexible sealing mechanism comprises a ring-shaped 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 guide shaft, and the ring-shaped pressing ring presses the outer ring of the flexible sealing piece against the inner wall of the test box.

[0014] As a further improved technical scheme of the application, an annular clamping groove is arranged on the guide shaft, and the inner ring of the flexible sealing piece is arranged in the annular clamping groove.

[0015] As a further improved technical scheme of the application, the groove bottom width d of the annular clamping groove is greater than the slot opening 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 air spring, the guide shaft and the second flexible sealing structure, the system complexity is not significantly increased, the bearing capacity of the system is improved, the sealing performance of the test box is ensured, the guide shaft sleeve is additionally arranged, the maximum overturning moment of the system is greatly enhanced, and it is ensured that the test box is not affected by vibration during testing, and the comprehensive test can be stably and safely performed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of an embodiment of the extension table auxiliary support device;

[0019] Figure 2 is a structural schematic view of an embodiment of the extension table auxiliary support device;

[0020] Figure 3 is Figure 1 is an enlarged view of A in FIG.

[0021] Wherein: 1 - exciter, 2 - exciter support, 3 - adapter, 4 - extension table, 5 - test box, 6 - first flexible sealing mechanism, 7 - air spring, 8 - guide shaft, 9 - second flexible sealing mechanism, 901 - annular pressing ring, 902 - flexible sealing element, 903 - fastener, 10 - support seat, 11 - guide shaft sleeve. DETAILED DESCRIPTION

[0022] The utility model will be described in detail 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 included in the protection scope of the utility model.

[0023] 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 away from the operator is the distal end." Or define with paper as the reference. Of course, if the position relationship between the two is defined by mutual reference in the subsequent description, it can not be defined here.

[0024] An extension table auxiliary support device for a low-pressure four-combined system, like Figures 1-2As shown in the figure, the low-pressure four-combined system comprises 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 for transmitting 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 on the test box 5, the adapter 3 can reciprocate in the first through hole, and a first flexible sealing mechanism 6 is arranged between the adapter 3 and the test box 5 to seal.

[0025] As shown in the figure, Figure 1 As shown in the figure, the extension table auxiliary support device comprises at least two circumferentially distributed support assemblies, the support assemblies are arranged between the extension table 4 and the vibrator support 2 or the support assemblies are arranged between the extension table 4 and a workbench, the support assemblies comprise air springs 7 and guide shafts 8 which are coaxially connected together, a second through hole is formed on the test box 5 and can be passed through by the guide shafts 8, a second flexible sealing mechanism 9 is arranged between the guide shafts 8 and the test box 5 to seal, and the sealing property of the test box 5 is ensured, so that there is no hard connection between the support assemblies and the test box 5. During the combined test, the air springs 7 in combination with the guide shafts 8 provide support force to support the extension table 4, the maximum load capacity of the low-pressure four-combined test system is enhanced, and the vibration is stable.

[0026] As an embodiment of the utility model, the air springs 7 are fixed on the extension table 4, and the guide shafts 8 are fixed on the vibrator support 2 at the ends away from the air springs 7; or the air springs 7 are fixed on the extension table 4, and the guide shafts 8 are fixed on the workbench at the ends away from the air springs 7, and the workbench is the table on which the low-pressure four-combined system is placed. The air springs 7 are arranged inside the test box 5, the total mass of the moving parts of the low-pressure four-combined test system is unchanged, and the vibration-related test performance is not affected.

[0027] As an embodiment of the utility model, as shown in the figure, Figure 2As shown in the figure, one end of the guide shaft 8 away from the air spring 7 is fixed on the expansion platform 4, and the air spring 7 is fixed on the vibrator support 2. Further specifically, a support seat 10 is arranged on the vibrator support 2, the air spring 7 is arranged in the support seat 10, the deformation direction of the air spring 7 is limited, and at the same time, since the air spring 7 is arranged outside the test box 5, the working temperature in the test box 5 is not affected. A guide shaft sleeve 11 is arranged on the upper portion of the support seat 10, the guide shaft 8 is arranged in the guide shaft sleeve 11, the guide shaft sleeve 11 is used for guiding the up-down movement of the guide shaft 8, and the maximum anti-overturning moment of the low-pressure four-combined test system is enhanced. In the radial direction, there is a gap between the outer circular wall of the guide shaft sleeve 11 and the second through hole, and in the axial direction, there is a certain safety distance between the guide shaft sleeve 11 and the test box 5, and the whole expansion platform auxiliary support device is not hard-connected with the test box 5, and the test box 5 is not affected by vibration during the test.

[0028] As an embodiment of the utility model, the air spring 7 is at least two and axially stacked, the air pressure in the air spring 7 can be adjusted according to the air pressure in the test box 5 and test requirements, and the arrangement of the air spring 7 will not affect the carrying capacity of the low-pressure four-combined test system.

[0029] As an embodiment of the utility model, the support assembly is three or four, and has a good stability effect on the expansion platform 4.

[0030] As an embodiment of the utility model, as shown in the figure, Figure 3 As shown in the figure, 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 guide shaft 8, 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 for connection. The inner ring diameter of the annular pressing ring 901 is greater than the diameter of the guide shaft 8. An annular clamping groove is formed in the guide shaft 8, and the inner ring of the flexible sealing piece 902 is arranged in the annular clamping groove. The groove bottom width d of the annular clamping groove is greater than the slot width D of the annular clamping groove. The flexible sealing piece 902 reduces the gap between the annular pressing ring 901, the guide shaft 8 and the test box 5, the second flexible sealing mechanism 9 improves the sealing performance between the guide shaft 8 and the test box 5, and the precision of the vibration test is ensured. 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 auxiliary support device for the low-pressure four-combined system expansion table top, which has simple structure, improves the bearing capacity of the system, greatly enhances the maximum anti-overturning moment of the system, and ensures that the comprehensive test can be carried out stably and safely under certain test conditions; there is no hard connection between the test box 5, which ensures that the test box 5 can be completely independent and not affected by vibration when various performance tests are carried out, and guarantees the purity and accuracy of test data; 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 also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0033] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the utility model, and are not used to limit the protection scope of the utility model, and equivalent embodiments or changes made without departing from the spirit of the utility model art should be included in the protection scope of the utility model.

Claims

1. An auxiliary support device for an extended table of a low-pressure four-combined system, the low-pressure four-combined system comprising a vibration exciter (1), a vibration exciter support (2), an extended table (4) and a test chamber (5), the vibration exciter (1) being mounted on the vibration exciter support (2), and the extended table (4) being capable of reciprocating into the test chamber (5), characterized in that: the auxiliary support device comprises at least two circumferentially distributed support assemblies, the support assemblies being arranged between the extended table (4) and the vibration exciter support (2), or the support assemblies being arranged between the extended table (4) and a workbench, the support assemblies each comprising an air spring (7) and a guide shaft (8) coaxially connected, a second through hole is formed in the test chamber (5) to allow the guide shaft (8) to pass through, and a second flexible sealing mechanism (9) is arranged between the guide shaft (8) and the test chamber (5) to seal.

2. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 1, characterized in that: the air spring (7) is fixed to the extended table (4), and an end of the guide shaft (8) away from the air spring (7) is fixed to the vibration exciter support (2).

3. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 1, characterized in that: the air spring (7) is fixed to the extended table (4), and an end of the guide shaft (8) away from the air spring (7) is fixed to the workbench.

4. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 1, characterized in that: an end of the guide shaft (8) away from the air spring (7) is fixed to the extended table (4), a support seat (10) is arranged on the vibration exciter support (2), and the air spring (7) is arranged in the support seat (10).

5. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 4, characterized in that: a guide shaft sleeve (11) is arranged on an upper portion of the support seat (10), the guide shaft (8) is arranged in the guide shaft sleeve (11), and the guide shaft sleeve (11) is used to guide the up-and-down movement of the guide shaft (8).

6. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 5, characterized in that: in a radial direction, there is a gap between an outer circular wall of the guide shaft sleeve (11) and the second through hole.

7. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 1, characterized in that: there are at least two air springs (7) arranged axially in a stacked manner.

8. The auxiliary support device for the extended table of the low-pressure four-combined system according to claim 1, 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 guide shaft (8), 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).

9. The extended table auxiliary support device for a low-pressure four-combined system according to claim 8, characterized in that: An annular clamping groove is formed on the guide shaft (8), and the inner ring of the flexible sealing piece (902) is arranged in the annular clamping groove.

10. The extended table auxiliary support device for a low-pressure four-combined system according to claim 9, characterized in that: The groove bottom width d of the annular clamping groove is greater than the slot opening width D of the annular clamping groove.

Images