Hydrostatic bearing assembly for two-axis vibration test bench and two-axis vibration test bench

Abstract

The utility model provides a hydrostatic bearing assembly for a two-axis vibration test bench and the two-axis vibration test bench, the hydrostatic bearing assembly is arranged between a workbench and a horizontal table top, the hydrostatic bearing assembly comprises an x-direction slide block, a y-direction slide block and a base, the base and the y-direction sliding block are in sliding connection through a dovetail sliding rail extending in the y direction and a dovetail groove, the x-direction sliding block and the y-direction sliding block are in sliding connection through a dovetail sliding rail extending in the x direction and a dovetail groove, a static pressure oil film is formed on the contact face of the base and the y-direction sliding block, and a static pressure oil film is formed on the contact face of the x-direction sliding block and the y-direction sliding block. According to the structure, the hydrostatic bearing assembly with the dovetail sliding rails matched with the dovetail grooves is adopted, decoupling of movement in the x direction and the y direction is achieved, the using upper limit frequency of the vibration test bed is improved, the distortion degree of the horizontal table top is improved, and the anti-overturning moment capacity of the horizontal table top is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration test benches, in particular to a static pressure bearing assembly for a two-axis vibration test bench and the two-axis vibration test bench. Background Art

[0002] Vibration test is a typical test of environmental mechanical test, which is widely used in mechanical simulation verification and reliability verification of automotive parts, aerospace products, etc.

[0003] Compared with the traditional uniaxial vibration test system, the two-axis vibration test system is closer to the real environment. At present, for the composite vibration test in the x and y directions on the market, cross-type linear guides are mostly used under the table to solve the decoupling problem in the direction of movement. However, the steel balls inside the slider of the cross-type linear guide and the surface of the slide rail are mechanical metal friction, which will cause the table to produce many harmonics due to friction, and the distortion of the table body is relatively large; in addition, the cross-type linear guide is a cross-superimposed combination of unidirectional linear guides, and its own ability to resist overturning torque is relatively low. Therefore, it is necessary to design a decoupling component that can meet the motion decoupling in the x and y directions, improve the distortion of the table, and enhance the ability of the table to resist overturning torque. Summary of the invention

[0004] The utility model aims to provide a static pressure bearing assembly for a two-axis vibration test bench and a two-axis vibration test bench to solve the above problems.

[0005] The technical solution adopted by the utility model is:

[0006] A hydrostatic bearing assembly for a two-axis vibration test bench is arranged between a workbench and a horizontal table surface. The hydrostatic bearing assembly includes an x-axis slider, a y-axis slider and a base. The base and the y-axis slider are slidably connected by a dovetail slide rail and a dovetail groove extending in the y-direction. The x-axis slider and the y-axis slider are slidably connected by a dovetail slide rail and a dovetail groove extending in the x-direction. A hydrostatic oil film is formed at the contact surface between the base and the y-axis slider, and a hydrostatic oil film is formed at the contact surface between the x-axis slider and the y-axis slider.

[0007] As a further improved technical solution of the utility model, a plurality of oil film bearing grooves are provided at the contact surface between the y-direction slider and the base, and a plurality of oil film bearing grooves are provided at the contact surface between the x-direction slider and the y-direction slider.

[0008] As a further improved technical solution of the utility model, the oil film bearing groove includes a first oil film bearing groove, a second oil film bearing groove and a third oil film bearing groove. The first oil film bearing groove is arranged on a horizontal plane next to the dovetail slide rail, the second oil film bearing groove is arranged on the horizontal plane of the dovetail groove, and the third oil film bearing groove is arranged on the inclined plane of the dovetail groove.

[0009] As a further improved technical solution of the utility model, an x-direction oil supply hole is arranged on the x-direction slider, a first oil supply channel is arranged in the x-direction slider, and a second oil supply channel is arranged in the y-direction slider. The first oil supply channel and the second oil supply channel are connected in series, and the first oil supply channel and the second oil supply channel supply oil to the oil film bearing groove.

[0010] As a further improved technical solution of the utility model, a plurality of throttling channels are arranged in the x-direction slider and the y-direction slider, and throttles are arranged in the throttling channels. The throttling channel in the x-direction slider is connected to the first oil supply channel and the oil film bearing groove, and the throttling channel in the y-direction slider is connected to the second oil supply channel and the oil film bearing groove.

[0011] As a further improved technical solution of the utility model, a screw plug with a hollow interior is provided in the throttling channel, the throttle is installed in the screw plug, and a sealing ring is provided between the screw plug and the inner wall of the throttling channel for sealing.

[0012] As a further improved technical solution of the utility model, an oil guide groove is provided at the corner where the dovetail slide rail and the dovetail groove cooperate.

[0013] As a further improved technical solution of the utility model, an oil drain groove is arranged on the dovetail slide rail.

[0014] A two-axis vibration test bench comprises a workbench, on which an x-direction excitation component, a y-direction excitation component and a horizontal platform surface are arranged. The x-direction excitation component can drive the horizontal platform surface to vibrate in the x-direction, and the y-direction excitation component can drive the horizontal platform surface to vibrate in the y-direction. A plurality of static pressure bearing components as described above are arranged between the horizontal platform surface and the workbench.

[0015] As a further improved technical solution of the utility model, the y-direction excitation assembly includes a y-direction exciter, a y-direction connector and an x-direction decoupling mechanism, the x-direction decoupling mechanism includes an x-direction decoupling rail and an x-direction decoupling slider, the x-direction decoupling slider is fixed on a horizontal surface, the x-direction decoupling rail is fixed on the y-direction connector, the x-direction decoupling slider can slide on the x-direction decoupling rail, and the y-direction connector is connected to the output end of the y-direction exciter; the structure of the x-direction excitation assembly is consistent with the structure of the y-direction excitation assembly.

[0016] The beneficial effects of the utility model are:

[0017] Through the above structure, a hydrostatic bearing assembly that matches a dovetail guide rail and a dovetail groove is used to solve the decoupling of movement in the x and y directions, increase the upper limit frequency of the vibration test bench, improve the distortion of the horizontal platform surface, and enhance the ability of the horizontal platform surface to resist overturning moment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a two-axis vibration test bench;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 is a schematic diagram of the structure of a hydrostatic bearing assembly;

[0021] Figure 4 is an exploded view of a hydrostatic bearing assembly;

[0022] Figure 5 is a schematic diagram of the interior of a hydrostatic bearing assembly;

[0023] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0024] Figure 7 It is a structural diagram of the throttle.

[0025] in:

[0026] 100-static bearing assembly, 101-x-direction slider, 102-y-direction slider, 103-base, 104-y-direction dovetail rail, 105-y-direction dovetail groove, 106-x-direction dovetail rail, 107-x-direction dovetail groove, 108-y-direction oil film bearing groove, 1081-first y-direction oil film bearing groove, 1082-second y-direction oil film bearing groove, 1083-third y-direction oil film bearing groove, 109-x-direction oil film bearing groove, 110-x-direction oil supply hole, 111-first oil supply channel, 112-second oil supply channel, 113-throttling channel, 114-throttle, 115-screw plug, 116-sealing ring, 117-oil drain groove, 118-oil guide groove, 119-table mounting hole, 120-base mounting hole;

[0027] 200- workbench;

[0028] 301 - x-direction exciter, 302 - y-direction decoupling mechanism;

[0029] 401 - y-axis exciter, 402 - y-axis connector, 4031 - x-axis decoupling rail, 4032 - x-axis decoupling slider;

[0030] 500-Horizontal platform surface;

[0031] 600 - Accumulator assembly. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0033] If the utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.) when describing, it is necessary to define the directions involved, such as "In order to clearly express the positions and directions described in the utility model, the end close to the operator is the proximal end, and the end away from the operator is the distal end." Or define it with the paper as a reference, etc. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, it does not need to be defined here.

[0034] A hydrostatic bearing assembly 100 for a two-axis vibration test bench, such as Figure 1 As shown, it is arranged between the workbench 200 and the horizontal platform surface 500, and is used to decouple the movement of the two-way excitation component, such as Figures 3-4 As shown, the hydrostatic bearing assembly 100 includes an x-direction slider 101, a y-direction slider 102, and a base 103. The base 103 and the y-direction slider 102 are slidably connected by a dovetail rail extending in the y direction and a dovetail groove, and the x-direction slider 101 and the y-direction slider 102 are slidably connected by a dovetail rail extending in the x direction and a dovetail groove. Oil paths are provided in the x-direction slider 101 and the y-direction slider 102, and a hydrostatic oil film is formed at the contact surface between the base 103 and the y-direction slider 102, and a hydrostatic oil film is formed at the contact surface between the x-direction slider 101 and the y-direction slider 102.

[0035] Specifically, Figure 4 As shown, the base 103 is provided with a y-direction dovetail rail 104, the y-direction slider 102 is provided with a y-direction dovetail groove 105 matched with the y-direction dovetail rail 104, and the y-direction slider 102 can slide in the y-direction on the y-direction dovetail rail 104; the y-direction slider 102 is provided with an x-direction dovetail rail 106, the x-direction slider 101 is provided with an x-direction dovetail groove 107 matched with the x-direction dovetail rail 106, and the x-direction slider 101 can slide in the x-direction on the x-direction dovetail rail 106.

[0036] The x-axis slider 101 is set at the bottom of the horizontal table 500, and the base 103 is set on the workbench 200. A plurality of table mounting holes 119 are set on the x-axis slider 101, and the table mounting holes 119 are used to connect the horizontal table 500 and the x-axis slider 101. A plurality of base 103 mounting holes 120 are set on the base 103, and the base 103 mounting holes 120 are used to connect the base 103 and the workbench 200.

[0037] like Figures 5-6 As shown, a plurality of oil film bearing grooves are provided at the contact surface between the y-direction slider 102 and the base 103, and a plurality of oil film bearing grooves are provided at the contact surface between the x-direction slider 101 and the y-direction slider 102. The oil film bearing grooves include a first oil film bearing groove, a second oil film bearing groove and a third oil film bearing groove, wherein the first oil film bearing groove is provided on a horizontal surface beside the dovetail slide rail, the second oil film bearing groove is provided on a horizontal surface of the dovetail groove, and the third oil film bearing groove is provided on an inclined surface of the dovetail groove.

[0038] As an embodiment of the present invention, a plurality of y-direction oil film bearing grooves 108 are provided at the contact surface between the y-direction slider 102 and the base 103, and a plurality of x-direction oil film bearing grooves 109 are provided at the contact surface between the x-direction slider 101 and the y-direction slider 102. As an embodiment of the present invention, the opening of the y-direction oil film bearing groove 108 faces the base 103, and the opening of the x-direction oil film bearing groove 109 faces the y-direction slider 102. Specifically, the structures of the y-direction oil film bearing groove 108 and the x-direction oil film bearing groove 109 are consistent. Taking the y-direction oil film bearing groove 108 as an example, the y-direction oil film bearing groove 108 includes a first y-direction oil film bearing groove 1081, a second y-direction oil film bearing groove 1082 and a third y-direction oil film bearing groove 1083. The first y-direction oil film bearing groove 1081 is arranged on the horizontal plane where the y-direction slider 102 contacts the base 103, the second y-direction oil film bearing groove 1082 is arranged on the horizontal plane of the y-direction dovetail groove 105, and the third y-direction oil film bearing groove 1083 is arranged on the inclined surface of the y-direction dovetail groove 105.

[0039] An x-direction oil supply hole 110 is provided on the x-direction slider 101, a first oil supply channel 111 is provided in the x-direction slider 101, and a second oil supply channel 112 is provided in the y-direction slider 102. The first oil supply channel 111 and the second oil supply channel 112 supply oil to the oil film bearing groove. The first oil supply channel 111 and the second oil supply channel 112 are connected in series, and at this time, only oil supply from the x-direction oil supply hole 110 alone can meet the oil supply of the entire hydrostatic bearing assembly 100. Alternatively, a y-direction oil supply hole is provided on the y-direction slider 102, and an external oil source supplies oil to the x-direction oil supply hole 110 and the y-direction oil supply hole, respectively.

[0040] A plurality of throttling channels 113 are provided in the x-direction slider 101 and the y-direction slider 102. The throttling channel 113 in the x-direction slider 101 is connected to the first oil supply channel 111 and the x-direction oil film bearing groove 109, and the throttling channel 113 in the y-direction slider 102 is connected to the second oil supply channel 112 and the y-direction oil film bearing groove 108. A throttling device 114 is provided in the throttling channel 113, and the throttling device 114 is used to throttle the oil flowing from the throttling channel 113 to the x-direction / y-direction oil film bearing groove 108. Figure 7 As shown, a screw plug 115 with a hollow interior is provided in the throttling channel 113, the throttle 114 is installed in the screw plug 115, and a sealing ring 116 is provided between the screw plug 115 and the inner wall of the throttling channel 113 for sealing. The oil enters the throttling channel 113 from the first / second oil supply channel 112 and is throttled by the throttle 114, and then flows out of the throttling channel 113 at a smaller flow rate and enters the x-direction / y-direction oil film bearing groove 108, so that the oil film pressure is established between the dovetail groove and the dovetail slide rail, which satisfies the relative sliding between the x-direction slider 101 and the y-direction slider 102, and the y-direction slider 102 and the base 103. As an embodiment of the utility model, the throttle 114 adopts a spiral throttle.

[0041] Oil drain grooves 117 are provided on both the x-direction dovetail slide rail 106 and the y-direction dovetail slide rail 104 , and the oil drain grooves 117 are used to drain excess oil.

[0042] An oil guide groove 118 is provided at the corner where the dovetail rail and the dovetail groove match, and the oil guide groove 118 is used to guide the flow of oil. Specifically, the concave groove formed between the y-direction dovetail rail 104 and the base 103 is provided with an oil guide groove 118, the concave groove formed between the x-direction dovetail rail 106 and the y-direction slider 102 is provided with an oil guide groove 118, the two concave corners of the y-direction dovetail groove are provided with an oil guide groove 118, and the two concave corners of the x-direction dovetail groove are provided with an oil guide groove 118. A notch is provided at the raised corner of the y-direction dovetail rail 104, a notch is provided at the raised corner of the x-direction dovetail rail 106, a notch is provided at the raised corner of the y-direction dovetail groove 105, and a notch is provided at the raised corner of the x-direction dovetail groove 107. The oil guide groove 118 cooperates with the notch to allow the oil to flow through the oil guide groove 118 and enter the x-direction / y-direction oil film bearing groove 108 located below.

[0043] A two-axis vibration test bench, such as Figures 1-2As shown, it includes a workbench 200, on which an x-direction excitation component, a y-direction excitation component and a horizontal platform 500 are arranged, the x-direction excitation component can drive the horizontal platform 500 to vibrate in the x-direction, the y-direction excitation component can drive the horizontal platform 500 to vibrate in the y-direction, and a plurality of hydrostatic bearing assemblies 100 as described above are arranged between the horizontal platform 500 and the workbench 200. The plurality of hydrostatic bearing assemblies 100 are distributed on the workbench 200 in a grid array.

[0044] The y-direction excitation component includes a y-direction exciter 401, a y-direction connector 402 and an x-direction decoupling mechanism, the x-direction structural mechanism includes an x-direction decoupling rail 4031 and an x-direction decoupling slider 4032, the x-direction decoupling slider 4032 is fixed on the horizontal platform 500, the x-direction decoupling rail 4031 is fixed on the y-direction connector 402, the x-direction decoupling slider 4032 can slide on the x-direction decoupling rail 4031, and the y-direction connector 402 is connected to the output end of the y-direction exciter 401.

[0045] The structure of the x-direction excitation component is consistent with that of the y-direction excitation component. The x-direction excitation component includes an x-direction exciter 301, an x-direction connector and a y-direction decoupling mechanism 302, wherein the y-direction structural mechanism includes a y-direction decoupling rail and a y-direction decoupling slider, wherein the y-direction decoupling slider is fixed on a horizontal surface 500, wherein the y-direction decoupling rail is fixed on the x-direction connector, wherein the y-direction decoupling slider can slide on the y-direction decoupling rail, and wherein the x-direction connector is connected to the output end of the x-direction exciter 301.

[0046] An accumulator assembly 600 is also provided on the workbench 200 , and the accumulator assembly 600 is used to store or release energy to meet different working requirements of the vibration test bench.

[0047] The hydrostatic bearing assembly 100 and the two-axis vibration test bench provided by the utility model adopt the hydrostatic bearing assembly 100 in which the dovetail guide rail and the dovetail groove are matched, so as to solve the decoupling of the movement in the x and y directions, increase the upper limit frequency of the use of the vibration test bench, improve the distortion of the horizontal platform surface 500, and enhance the ability of the horizontal platform surface 500 to resist the overturning moment.

[0048] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0049] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hydrostatic bearing assembly for a two-axis vibration test bench, arranged between a workbench (200) and a horizontal table surface (500), characterized in that: The hydrostatic bearing assembly comprises an x-direction slider (101), a y-direction slider (102) and a base (103); the base (103) and the y-direction slider (102) are slidably connected by a dovetail slide rail and a dovetail groove extending in the y-direction; the x-direction slider (101) and the y-direction slider (102) are slidably connected by a dovetail slide rail and a dovetail groove extending in the x-direction; a hydrostatic oil film is formed at a contact surface between the base (103) and the y-direction slider (102); and a hydrostatic oil film is formed at a contact surface between the x-direction slider (101) and the y-direction slider (102).

2. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 1, characterized in that: A plurality of oil film bearing grooves are provided at the contact surface between the y-direction slider (102) and the base (103), and a plurality of oil film bearing grooves are provided at the contact surface between the x-direction slider (101) and the y-direction slider (102).

3. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 2, characterized in that: The oil film bearing groove includes a first oil film bearing groove, a second oil film bearing groove and a third oil film bearing groove. The first oil film bearing groove is arranged on a horizontal plane beside the dovetail slide rail, the second oil film bearing groove is arranged on a horizontal plane of the dovetail groove, and the third oil film bearing groove is arranged on an inclined plane of the dovetail groove.

4. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 2, characterized in that: An x-direction oil supply hole (110) is provided on the x-direction slider (101), a first oil supply channel (111) is provided in the x-direction slider (101), and a second oil supply channel (112) is provided in the y-direction slider (102), the first oil supply channel (111) and the second oil supply channel (112) are connected in series, and the first oil supply channel (111) and the second oil supply channel (112) supply oil to the oil film bearing groove.

5. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 4, characterized in that: A plurality of throttling channels (113) are arranged in the x-direction slider (101) and the y-direction slider (102), and a throttling device (114) is arranged in the throttling channel (113). The throttling channel (113) in the x-direction slider (101) is connected to the first oil supply channel (111) and the oil film bearing groove, and the throttling channel (113) in the y-direction slider (102) is connected to the second oil supply channel (112) and the oil film bearing groove.

6. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 5, characterized in that: A screw plug (115) with a hollow interior is arranged in the throttling channel (113), the throttle (114) is installed in the screw plug (115), and a sealing ring (116) is arranged between the screw plug (115) and the inner wall of the throttling channel (113) for sealing.

7. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 1, characterized in that: An oil guide groove (118) is provided at the corner where the dovetail slide rail and the dovetail groove match.

8. The hydrostatic bearing assembly for a two-axis vibration test bench according to claim 1, characterized in that: An oil drain groove (117) is provided on the dovetail slide rail.

9. A two-axis vibration test bench, characterized in that: The invention comprises a workbench (200), on which an x-direction excitation component, a y-direction excitation component and a horizontal platform (500) are arranged, wherein the x-direction excitation component can drive the horizontal platform (500) to vibrate in the x-direction, and the y-direction excitation component can drive the horizontal platform (500) to vibrate in the y-direction, and a plurality of hydrostatic bearing components (100) as claimed in claim 1 are arranged between the horizontal platform (500) and the workbench (200).

10. The two-axis vibration test bench according to claim 9, characterized in that: The y-direction excitation component comprises a y-direction exciter (401), a y-direction connector (402) and an x-direction decoupling mechanism; the x-direction decoupling mechanism comprises an x-direction decoupling slide rail (4031) and an x-direction decoupling slider (4032); the x-direction decoupling slider (4032) is fixed on a horizontal surface (500); the x-direction decoupling slide rail (4031) is fixed on the y-direction connector (402); the x-direction decoupling slider (4032) can slide on the x-direction decoupling slide rail (4031); the y-direction connector (402) is connected to the output end of the y-direction exciter (401); the structure of the x-direction excitation component is consistent with the structure of the y-direction excitation component.

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