CN116153178A - Swing test bed - Google Patents

Abstract

The invention provides a swing test bed which comprises an outer ring body rotatably arranged on a concrete foundation or a bearing frame through a first rotating shaft, wherein an inner skirt body is rotatably arranged in the outer ring body through a second rotating shaft, and the axes of the two rotating shafts are vertical; the swing test bed further comprises a group of rolling driving mechanisms and a group of pitching driving mechanisms, wherein the rolling driving mechanisms comprise two rolling main driving mechanisms positioned on two sides of the axis of the second rotating shaft, one ends of the two rolling main driving mechanisms are connected with the inner skirt body, the other ends of the two rolling main driving mechanisms are connected with the concrete foundation or the bearing frame, the pitching driving mechanisms comprise two pitching main driving mechanisms positioned on two sides of the axis of the first rotating shaft, one ends of the two pitching main driving mechanisms are connected with the outer ring body, and the other ends of the two pitching main driving mechanisms are connected with the concrete foundation or the bearing frame. When the inner skirt body is independently simulated to roll, only the rolling driving mechanism is required to act, and the pitching driving mechanism is not required to act, so that the control operation can be simplified, and the energy consumption of the pitching driving mechanism can be reduced.

Description

Swing test bed

Technical Field

The invention relates to the technical field of ship motion simulation equipment, in particular to a swing test bed.

Background

The swinging test bed is a space motion mechanism widely used for simulating the motion gesture of a ship, can simulate the motion state of the ship under various sea conditions, truly reproduces the actual motion state of the ship, and provides a reliable and economic test environment for the development of ship-borne equipment. The swing test bed is a large-scale high-precision physical simulation system integrating mechanical, electrical, hydraulic, instrument and meter technologies, and the like, so that the development period of carrier-based equipment can be shortened, and the development cost can be saved.

For example, a serial-parallel combined type two-degree-of-freedom heavy swing platform disclosed in the Chinese patent application with the application publication number of CN111564095A comprises a bearing frame, an outer cradle (namely an outer ring body) and an inner cradle (namely an inner skirt body), wherein the outer ring body is arranged on the bearing frame through a first rotating shaft, the inner skirt body is arranged in the outer ring body through a second rotating shaft, the axes of the first rotating shaft and the second rotating shaft are horizontal, and the axes of the first rotating shaft and the second rotating shaft are positioned in the same horizontal plane and are vertically distributed. The swinging platform further comprises a swinging object mounting frame and two groups of parallel driving mechanisms, the swinging object mounting frame is mounted on the inner skirt body, each group of parallel driving mechanisms comprises two main driving branches which are symmetrically distributed, the central axis of each group of main driving branches is located on the same plane with one horizontal axis and is symmetrically distributed on two sides of the other horizontal axis, and the inner skirt body swings up and down along the two horizontal axes through the parallel driving mechanisms.

The two groups of driving mechanisms of the swinging platform are connected with the inner skirt body, can control the inner skirt body to roll around the axis of the second rotating shaft, pitch around the axis of the first rotating shaft and compound swinging movement, simulate various different movement states of the ship, but when only the inner skirt body needs to be simulated to roll, besides the need of a group of driving mechanisms to apply swinging force to the inner skirt body, the other group of driving mechanisms also need to synchronously move so as to adapt to the swinging of the inner skirt body, namely, the two groups of driving mechanisms need to move, thus the control operation is complex, and the energy consumption of the other group of driving mechanisms is increased. In addition, when the swinging platform simulates the static state of the ship deck, the swinging platform can be realized only through the posture adjustment of the driving mechanism, and the control precision requirement is high and the difficulty is high.

Disclosure of Invention

The invention aims to provide a swing test bed, which solves the problems that in the prior art, when an inner skirt body is independently simulated to roll, the control operation is complex, and the energy consumption of a driving mechanism is increased.

In order to achieve the above purpose, the swing test stand of the invention adopts the following technical scheme:

the swing test bed comprises an outer ring body which is rotatably arranged on a concrete foundation or a bearing frame through a first rotating shaft, an inner skirt body is arranged in the outer ring body, the inner skirt body is rotatably arranged on the outer ring body through a second rotating shaft, the axis of the second rotating shaft and the axis of the first rotating shaft are both positioned in a horizontal plane and are mutually perpendicular, and an installation structure for installing tested equipment is arranged on the inner skirt body; the swing test stand further comprises a group of rolling driving mechanisms and a group of pitching driving mechanisms, wherein the group of rolling driving mechanisms and the group of pitching driving mechanisms are arranged below the inner skirt body and the outer ring body, the group of rolling driving mechanisms comprise two rolling main driving mechanisms which are respectively positioned at two sides of the axis of the second rotating shaft, one ends of the two rolling main driving mechanisms are respectively connected with the inner skirt body, the other ends of the two rolling main driving mechanisms are respectively connected with the concrete foundation or the bearing frame, the group of pitching driving mechanisms comprise two pitching main driving mechanisms which are respectively positioned at two sides of the axis of the first rotating shaft, one ends of the two pitching main driving mechanisms are respectively connected with the outer ring body, and the other ends of the two pitching main driving mechanisms are respectively connected with the concrete foundation or the bearing frame.

The beneficial effects of the technical scheme are that: the two rolling main driving mechanisms are respectively positioned at two sides of the axis of the second rotating shaft, one ends of the two rolling main driving mechanisms are respectively connected with the inner skirt body, and the other ends of the two rolling main driving mechanisms are respectively connected with the concrete foundation or the bearing frame, so that the rolling movement of the inner skirt body around the axis of the second rotating shaft can be controlled; the two pitching main driving mechanisms are respectively positioned at two sides of the axis of the first rotating shaft, one ends of the two pitching main driving mechanisms are respectively connected with the outer ring body, the other ends of the two pitching main driving mechanisms are respectively connected with the concrete foundation or the bearing frame, and the pitching motion of the outer ring body around the axis of the first rotating shaft can be controlled, so that the outer ring body drives the inner skirt body to produce pitching motion.

Therefore, when the inner skirt body is required to be independently simulated to roll, only the roll driving mechanism is required to act, and the pitching driving mechanism is not required to act, so that the control operation can be simplified, and meanwhile, the energy consumption of the pitching driving mechanism can be reduced.

Further, the two main rolling driving mechanisms are symmetrically arranged relative to the second rotating shaft, the two main rolling driving mechanisms are arranged in a plane where the first rotating shaft is located, one group of auxiliary rolling driving mechanisms are symmetrically arranged on two sides of each main rolling driving mechanism, one end of each auxiliary rolling driving mechanism is connected with the inner skirt body, and the other end of each auxiliary rolling driving mechanism is connected with the concrete foundation or the bearing frame.

The beneficial effects of the technical scheme are that: the main rolling driving mechanism and the auxiliary rolling driving mechanism are matched, so that larger driving force can be provided, and different sea conditions can be simulated.

Further, the rolling main driving mechanism and the connecting positions of the rolling auxiliary driving mechanisms at the two sides of the rolling main driving mechanism and the inner skirt body are arranged in a straight shape, and compared with the connecting positions of the concrete foundation or the bearing frame, the connecting positions of the rolling auxiliary driving mechanisms at the two sides of the rolling main driving mechanism and the concrete foundation or the bearing frame are closer to the axis of the second rotating shaft.

The beneficial effects of the technical scheme are that: the stroke design of the auxiliary driving mechanism is convenient, so that the auxiliary driving mechanism has a larger working stroke.

Further, the two pitching main driving mechanisms are symmetrically arranged relative to the first rotating shaft, the two pitching main driving mechanisms are arranged in a plane where the second rotating shaft is located, one group of pitching driving mechanisms further comprises pitching auxiliary driving mechanisms symmetrically arranged on two sides of each pitching main driving mechanism, one end of each pitching auxiliary driving mechanism is connected with the outer ring body, and the other end of each pitching auxiliary driving mechanism is connected with the concrete foundation or the bearing frame.

The beneficial effects of the technical scheme are that: the pitching main driving mechanism and the pitching auxiliary driving mechanism are matched, so that larger driving force can be provided, and different sea conditions can be simulated.

Further, the pitch main driving mechanism and the connection positions of the pitch auxiliary driving mechanisms at the two sides of the pitch main driving mechanism and the outer ring body are arranged in a straight shape, and compared with the connection positions of the concrete foundation or the bearing frame, the connection positions of the pitch auxiliary driving mechanisms at the two sides of the pitch main driving mechanism and the concrete foundation or the bearing frame are closer to the axis of the first rotating shaft.

The beneficial effects of the technical scheme are that: the stroke design of the auxiliary driving mechanism is convenient, so that the auxiliary driving mechanism has a larger working stroke.

Further, the inner skirt body is of a closed box girder structure, a through hole is formed in the center of the inner skirt body, and the mounting structure is a mounting base arranged at the hole of the upper end of the through hole.

The beneficial effects of the technical scheme are that: the inner skirt body has high structural strength and is convenient for the installation of tested equipment.

Further, a hanging basket is fixed below the inner skirt body, a connecting structure used for being detachably connected with the hanging basket is arranged on the lower surface of the inner skirt body, and the hanging basket comprises a peripheral frame and a bottom plate fixed at the bottom of the peripheral frame.

The beneficial effects of the technical scheme are that: the hanging basket simulates a space structure below the main deck, and can meet the installation requirement of tested equipment below the main deck.

Further, the swing test stand also comprises a roll locking mechanism and a pitching locking mechanism, wherein the roll locking mechanism comprises a roll locking block which is arranged on the outer ring body and can move in a telescopic way, and the roll locking block is used for being in stop fit with the inner skirt body after extending out so as to prevent the inner skirt body from performing roll movement; the pitch lock mechanism includes a telescopically movable pitch lock block for mounting to the concrete foundation or carrier for engagement with the outer ring body stop after extension to prevent pitch movement of the outer ring body.

The beneficial effects of the technical scheme are that: the inner skirt body and the outer ring body are conveniently locked, so that the inner skirt body is stable and reliable and is in a horizontal state, and the ship deck posture during mooring test can be conveniently simulated.

Further, the roll locking mechanism also comprises a roll fixing block fixed at the bottom of the inner skirt body, and stop inclined planes for stopping and matching are respectively arranged on the roll fixing block and the roll locking block; the pitching locking mechanism further comprises a pitching fixing block fixed at the bottom of the outer ring body, and blocking inclined planes for blocking and matching are respectively arranged on the pitching fixing block and the pitching locking block.

The beneficial effects of the technical scheme are that: through the cooperation of fixed block and locking piece, simple structure conveniently realizes the locking of interior skirt body and outer ring body.

Further, two first rotating shafts are respectively positioned at the two longitudinal ends of the outer ring body and are respectively in rotating fit with the concrete foundation or the bearing frame through first bearings; the two second rotating shafts are respectively positioned at the two transverse ends of the inner skirt body and are respectively in running fit with the outer ring body through the second bearings; one of the two first bearings and the two second bearings is a fixed bearing, and the other is a floating bearing capable of axially moving.

The beneficial effects of the technical scheme are that: one is a fixed bearing, and the other is a floating bearing capable of moving axially, so that the rotating shaft can have certain displacement in the axial direction, and the change of the environmental temperature can be adapted.

Drawings

FIG. 1 is a front view of a rocking test stand of the present invention;

FIG. 2 is a top view of a rocking test stand of the present invention;

FIG. 3 is a left side view of the rocking test stand of the present invention;

FIG. 4 is a bottom view of the inner skirt of the rocking test stand of the present invention;

FIG. 5 is a bottom view of the outer ring of the rocking test stand of the present invention;

FIG. 6 is a perspective view of a basket of the swing test stand of the present invention;

FIG. 7 is a layout of the pitch and roll drive mechanisms of the swing test stand of the present invention;

FIG. 8 is a block diagram of a pitch lock mechanism of the swing test stand of the present invention;

fig. 9 is a view showing an installation structure of a pitch axis of the swing test stand according to the present invention.

In the figure: 1. an inner skirt; 11. an inner skirt body; 12. a second rotating shaft; 13. perforating; 14. a threaded hole site; 15. a roll drive mechanism mounting plate; 16. a roll lock block mounting surface; 2. an outer ring body; 21. an outer ring body; 22. a first rotating shaft; 23. a pitch lock block mounting surface; 24. a pitch drive mechanism mounting plate; 25. a roll locking mechanism body mounting surface; 3. a hanging basket; 31. an upper layer hanging basket; 32. an upper floor; 33. a lower layer hanging basket; 34. a lower floor; 4. a pitch drive mechanism; 41. a pitch main drive mechanism; 42. a pitch assist drive mechanism; 5. a pitch lock mechanism; 51. a motor; 52. a speed reducer; 53. a screw; 54. a fixing frame; 55. a pitch lock block; 56. a pitching fixing block; 57. a nut seat; 6. a roll drive mechanism; 61. a roll main drive mechanism; 62. a roll auxiliary drive mechanism; 7. a pitching axis; 71. fixing an end cover at the outer side of the bearing seat; 72. a fixed end bearing seat; 73. a self-aligning roller bearing; 74. a bearing outer ring retainer ring; 75. a bearing inner ring retainer ring; 76. an end cover at the inner side of the bearing seat; 77. a floating end bearing seat; 78. bearing inner ring pressing ring; 79. an end cover at the outer side of the floating bearing seat; 8. a rotary transformer; 9. a roll locking mechanism; 10. and (5) mounting a base.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and capabilities of the present invention are described in further detail below in connection with the examples.

In one embodiment of the swing test stand according to the present invention, as shown in fig. 1, 2 and 3, the inner skirt 1 and the outer ring 2 are combined with fig. 5, the outer ring 2 includes a square outer ring body 21, two first rotating shafts 22 are respectively provided at both longitudinal ends of the outer ring body 21, the two first rotating shafts 22 are coaxial and located on a center line of the outer ring body 21, and the outer ring 2 is rotatably mounted on a concrete foundation or a bearing frame (not shown) through the two first rotating shafts 22, wherein the bearing frame may be a rigid truss.

The inner skirt body 1 is arranged in the outer ring body 2, and is shown in combination with fig. 1-4, the inner skirt body 1 comprises an inner skirt body main body 11 which is square, the inner skirt body main body 11 is of a closed box girder structure, two transverse ends of the inner skirt body main body 11 are respectively provided with a second rotating shaft 12, the two second rotating shafts 12 are coaxial and are positioned on the central line of the inner skirt body main body 11, the inner skirt body 1 is rotatably arranged on the outer ring body 1 through the two second rotating shafts 12, and the axis of the second rotating shaft 12 and the axis of the first rotating shaft 22 are positioned in the same horizontal plane and are mutually perpendicular.

The inner skirt body 11 is provided with a mounting structure for mounting the tested equipment, specifically, the center of the inner skirt body 11 is provided with a perforation 13, and the mounting structure is a mounting base 10 arranged at the hole of the upper end of the perforation 13. The hanging basket 3 is fixed below the inner skirt body 1 and is used for simulating a space structure below a main deck of a ship, and the installation requirement of tested equipment below the main deck can be met, so that a connecting structure for detachably connecting with the hanging basket 3 is arranged on the lower surface of the inner skirt body 11, as shown in fig. 4, the connecting structure in the embodiment is a plurality of threaded hole sites 14, and the plurality of threaded hole sites 14 are arranged at intervals to form a square.

As shown in fig. 6, the basket 3 comprises an upper basket 31 and a lower basket 32, the upper basket 31 comprises an upper peripheral frame and an upper bottom plate 33 fixed at the bottom of the upper peripheral frame, the lower basket 32 comprises a lower peripheral frame and a lower bottom plate 34 fixed at the bottom of the lower peripheral frame, the upper peripheral frame and the lower peripheral frame are both truss structures, and all main components are connected by bolts. The upper layer hanging basket 31 is fixed on the threaded hole site 14 on the lower surface of the inner skirt body main body 11 through a screw, the upper layer hanging basket 31 and the lower layer hanging basket 32 are connected through bolts, when tested equipment is different, one layer hanging basket or two layers of hanging baskets can be removed, and a layer of hanging basket can be additionally arranged at the bottom of the hanging basket. Of course, the bottom plate of the hanging basket can be provided with holes according to the installation characteristics of the tested equipment, so that the coordination of the actions among the devices of the tested equipment can be met.

As shown in fig. 1 to 3, the swing test stand further includes a group of roll driving mechanisms 6 and a group of pitch driving mechanisms 4 disposed below the inner skirt 1 and the outer ring 2, and as shown in connection with fig. 7, the group of roll driving mechanisms 6 includes two roll main driving mechanisms 61 located on both sides of the axis of the second rotating shaft 12, respectively, the two roll main driving mechanisms 61 are symmetrically arranged with respect to the second rotating shaft 12, and the two roll main driving mechanisms 61 are arranged in a plane in which the first rotating shaft 22 is located. The group of rolling driving mechanisms 6 further comprises rolling auxiliary driving mechanisms 62 symmetrically arranged on two sides of each rolling main driving mechanism 61, wherein the upper ends of the two rolling main driving mechanisms 61 and the four rolling auxiliary driving mechanisms 62 are respectively connected with the inner skirt body main body 11, and the lower ends of the two rolling main driving mechanisms and the four rolling auxiliary driving mechanisms 62 are respectively connected with a concrete foundation or a bearing frame.

As shown in fig. 4, six roll driving mechanism mounting plates 15 are provided on the lower surface of the inner skirt body 11 in total, three of which are arranged in a group, two of which are symmetrically arranged about the axis of the second rotating shaft 12, and three roll driving mechanism mounting plates 15 in a group are arranged in a straight line, that is, the connection positions of one roll main driving mechanism 61 and roll auxiliary driving mechanisms 62 on both sides thereof with the inner skirt body 1 are arranged in a straight line, and the distances from the three connection positions to the axis of the second rotating shaft 12 are the same. As shown in fig. 3 and 7, the connection positions of the roll auxiliary driving mechanisms 62 on two sides and the concrete foundation or the bearing frame are closer to the axis of the second rotating shaft 12 than the connection positions of the roll main driving mechanisms 61 and the concrete foundation or the bearing frame, that is, the distance from the connection positions of the roll main driving mechanisms 61 and the concrete foundation or the bearing frame to the axis of the second rotating shaft 12 is greater than the distance from the connection positions of the roll auxiliary driving mechanisms 62 on two sides and the concrete foundation or the bearing frame to the axis of the second rotating shaft 12, so that the stroke design of the auxiliary driving mechanisms can be facilitated, and the auxiliary driving mechanisms have larger working strokes.

As shown in fig. 1 to 3 and 7, the group of pitch drive mechanisms 4 includes two pitch main drive mechanisms 41 located on both sides of the axis of the first rotation shaft 22, respectively, the two pitch main drive mechanisms 41 are symmetrically arranged with respect to the first rotation shaft 22, and the two pitch main drive mechanisms 41 are arranged in a plane in which the second rotation shaft 12 lies. The group of pitching driving mechanisms 4 further comprises pitching auxiliary driving mechanisms 42 symmetrically arranged on two sides of each pitching main driving mechanism 41, wherein the upper ends of the two pitching main driving mechanisms 41 and the four pitching auxiliary driving mechanisms 42 are respectively connected with the outer ring body 2, and the lower ends of the two pitching main driving mechanisms 41 and the four pitching auxiliary driving mechanisms 42 are respectively connected with a concrete foundation or a bearing frame.

As shown in fig. 5, six pitch drive mechanism mounting plates 24 are provided on the lower surface of the outer ring body 21 in total, three of which are arranged in a group, two of which are symmetrically arranged about the axis of the first rotating shaft 22, and three pitch drive mechanism mounting plates 24 in a group are arranged in a straight line, that is, the connection positions of one pitch main drive mechanism 41 and pitch auxiliary drive mechanisms 42 on both sides thereof with the outer ring body 2 are arranged in a straight line, and the distances from the three connection positions to the axis of the first rotating shaft 22 are the same. As shown in fig. 1 and 7, the connection positions of the pitch auxiliary driving mechanisms 42 on both sides and the concrete foundation or the bearing frame are closer to the axis of the first rotating shaft 22 than the connection positions of the pitch main driving mechanisms 41 and the concrete foundation or the bearing frame, that is, the distance from the connection positions of the pitch main driving mechanisms 41 and the concrete foundation or the bearing frame to the axis of the first rotating shaft 22 is greater than the distance from the connection positions of the pitch auxiliary driving mechanisms 42 on both sides and the concrete foundation or the bearing frame to the axis of the first rotating shaft 22, so that the stroke design of the auxiliary driving mechanisms can be facilitated, and the auxiliary driving mechanisms have larger working strokes.

In this embodiment, the roll main driving mechanism 61, the roll auxiliary driving mechanism 62, the pitch main driving mechanism 41 and the pitch auxiliary driving mechanism 42 are all hydraulic cylinders, the upper and lower hinge point mounting surfaces of the hydraulic cylinders are inclined surfaces, and when the inner skirt deck is in a horizontal state, the axis of the hydraulic cylinders is in a vertical state with the mounting surfaces. The hinged support point mounting seat adopts an inclined plane structure, so that the stress condition of the hydraulic cylinder hinged support is improved.

When the multifunctional hand-held device is used, the inner skirt body table top drives tested equipment and the hanging basket 3 to realize the rolling motion around the axis of the second rotating shaft 12 under the driving of the rolling driving mechanism 6. The outer ring body 2 drives the inner skirt body table surface to realize pitching motion around the axis of the first rotating shaft 22 under the driving of the pitching driving mechanism 4. The pitching driving mechanism 4 and the rolling driving mechanism 6 are divided into a main driving mechanism and an auxiliary driving mechanism, different driving modes are selected according to the working mode of the tested equipment, and when the tested equipment has no impact or has smaller impact, the main driving mechanism is selected to work independently, and the auxiliary driving mechanism is in a following state; when the impact of the tested equipment is large, the main driving mechanism and the auxiliary driving mechanism are selected to work together. The driving mode of the swing test bed is selected according to the working mode of the tested equipment, so that the main working time of the swing test bed can be maintained at a lower power level, and the energy consumption of a hydraulic system is saved. Particularly, when the rolling of the inner skirt body 1 is independently simulated, only the rolling driving mechanism is required to act, and the pitching driving mechanism does not need to act, so that the control operation can be simplified, and the energy consumption of the pitching driving mechanism can be reduced.

In order to conveniently lock the inner skirt body 1 and the outer ring body 2, the inner skirt body 1 is enabled to be in a horizontal state stably and reliably, the ship deck posture during mooring test is convenient to simulate, and the swing test bed further comprises a roll locking mechanism 9 and a pitching locking mechanism 5. As shown in fig. 8, the pitch lock mechanism 5 includes a pitch lock block 55 for telescopic movement mounted on a concrete foundation or a carrier, and a pitch lock block 56 fixed to the bottom of the outer ring body 2, four pitch lock block mounting surfaces 23 are provided in total on the lower surface of the outer ring body 21, as shown in fig. 5, with the four pitch lock block mounting surfaces 23 being located at four corners. The pitch lock block 55 and the pitch lock block 56 are respectively provided with a stop slope for a stop fit, and the pitch lock block 55 is in stop fit with the pitch lock block 56 after being extended to prevent the outer ring body from making a pitch motion.

Specifically, as shown in fig. 8, the pitching locking mechanism 5 includes a motor 51, an output end of the motor 51 is connected with a speed reducer 52, an output end of the speed reducer 52 is in transmission connection with a screw rod 53, a nut seat 57 is in threaded connection with the screw rod 53, a pitching locking block 55 is sleeved outside the nut seat 57 and is fixedly connected with the nut seat 57 through a screw, and meanwhile, the pitching locking block 55 is installed in a guide hole of a fixing frame 54, so that under the principle of a screw-nut mechanism, the speed reducer 52 drives the screw rod 53 to perform rotary motion, the pitching locking block 55 can only perform direct motion, and after the pitching locking block is extended, the outer ring body is locked with the pitching locking block 56 through an inclined plane, so that the outer ring body stays at a horizontal position.

The roll locking mechanism 9 comprises a roll locking block which is arranged on the outer ring body 2 and can move in a telescopic way and a roll fixing block which is fixed at the bottom of the inner skirt body 1, wherein stop inclined planes for stopping the fit are respectively arranged on the roll locking block and the roll locking block, and the roll locking block is in stop fit with the roll fixing block after extending out so as to prevent the inner skirt body 1 from performing roll motion, so that the inner skirt body stays at a horizontal position. The structure and the working principle of the roll locking mechanism 9 are the same as those of the pitch locking mechanism 5, except that the installation mode is different, the roll locking mechanism 9 is a flip-chip mechanism, and the pitch locking mechanism 5 is a positive installation mode. As shown in fig. 5, four roll lock mechanism body mounting surfaces 25 are provided on the lower surface of the outer ring body 21 in total, and roll lock blocks are mounted on the roll lock mechanism body in the same manner as the pitch lock blocks 55. As shown in fig. 4, four roll lock block attachment surfaces 16 are provided on the lower surface of the inner skirt body 11.

In the test, the two first shafts 22 constitute a pitch axis system 7, the two second shafts 12 constitute a roll axis system, and as shown in fig. 2, a resolver 8 is mounted at the end of the pitch axis system 7 as a real-time detection device for the roll angle. At the same time, a resolver (not shown in the figure) is also mounted at the end of the roll axis. The two first rotating shafts 22 of the pitching shaft system 7 are respectively in running fit with a concrete foundation or a bearing frame through first bearings, the two second rotating shafts 12 of the rolling shaft system are respectively in running fit with the outer ring body 2 through second bearings, one of the two first bearings and the two second bearings is a fixed bearing, the other one is a floating bearing capable of axially moving, the bearings can axially stretch and retract in the bearing seat, and the requirement of adapting the large-span shaft system to temperature change is met.

The pitch axis system 7 and the roll axis system have the same structure, and as shown in fig. 9, the pitch axis system 7 is taken as an example, and the first bearing on the first rotating shaft 22 is a self-aligning roller bearing 73, wherein the left side is a fixed end, and the right side is a floating end. The two ends of the shafting are respectively provided with a fixed end bearing seat 72 and a floating end bearing seat 77, the fixed end bearing seat 72 is provided with a bearing outer ring retainer ring 74, a bearing inner ring retainer ring 75, a fixed bearing seat outer side end cover 71, a bearing seat inner side end cover 76 and other parts, and the like, so that the adjustable roller bearing 73 is axially and bidirectionally fixed; the floating end bearing seat 77 is provided with a bearing seat inner end cover 76, a bearing inner ring pressing ring 78, a floating bearing seat outer end cover 79 and other parts, and the aligning roller bearing 73 and the first rotating shaft 22 can stretch and retract in the bearing seat so as to adapt to the change of the environmental temperature.

The pitching shaft system 7 and the rolling shaft system both adopt self-aligning roller bearings, and the rollers can swing in an arc-shaped roller path at a small angle (less than 3 degrees), so that the requirements of bending deformation of the shaft system under a large-span heavy-load environment can be met.

In other embodiments of the rocking test stand: the first bearing and the second bearing may be tapered roller bearings; the first bearing and the second bearing can be fixed bearings and can not float; the first bearing and the second bearing may be not rolling bearings, but sliding bearings; of course, the first bearing and the second bearing may not be provided, and the first rotating shaft and the second rotating shaft may be directly assembled in a sliding manner.

In other embodiments of the rocking test stand: the rolling locking mechanism does not comprise a rolling fixed block, a stop surface matched with the rolling locking block is directly processed at the bottom of the inner skirt body, the pitching locking mechanism does not comprise a pitching fixed block, and a stop surface matched with the pitching locking block is directly processed at the bottom of the outer ring body.

In other embodiments of the rocking test stand: the rolling locking block is not in inclined-plane stop fit with the inner skirt body, the pitching locking block is not in inclined-plane stop fit with the outer ring body, but insertion holes are formed in the inner skirt body and the outer ring body respectively, the rolling locking block is inserted into the insertion holes in the inner skirt body after extending out so as to prevent the inner skirt body from doing rolling motion, and the pitching locking block is inserted into the insertion holes in the outer ring body after extending out so as to prevent the outer ring body from doing pitching motion.

In other embodiments of the rocking test stand: the roll locking block and the pitch locking block can also be directly connected with the telescopic end of the hydraulic cylinder or the air cylinder so as to control the telescopic movement of the hydraulic cylinder or the air cylinder.

In other embodiments of the rocking test stand: the hanging basket is not fixed below the inner skirt body.

In other embodiments of the rocking test stand: the inner skirt body is of a frame structure, and a mounting structure for mounting the tested equipment can be arranged on the upper surface of the frame structure.

In other embodiments of the rocking test stand: the connecting positions of the pitching main driving mechanism and the concrete foundation or the bearing frame and the connecting positions of the pitching auxiliary driving mechanisms on the two sides and the concrete foundation or the bearing frame can be arranged in a straight line, namely, the distances from the three connecting positions to the axis of the first rotating shaft are equal.

In other embodiments of the rocking test stand: the connection positions of the rolling main driving mechanism and the concrete foundation or the bearing frame and the connection positions of the rolling auxiliary driving mechanisms on two sides and the concrete foundation or the bearing frame can be arranged in a straight line, namely, the distances from the three connection positions to the axis of the second rotating shaft are equal.

In other embodiments of the rocking test stand: the pitching main driving mechanism, the pitching auxiliary driving mechanism, the rolling main driving mechanism and the rolling auxiliary driving mechanism can be air cylinders or electric push rods.

In other embodiments of the rocking test stand: one set of pitch drives comprises only two pitch main drives, and no pitch auxiliary drive, which may or may not be symmetrical.

In other embodiments of the rocking test stand: a group of roll driving mechanisms only comprises two roll main driving mechanisms, and no roll auxiliary driving mechanism is arranged, and the two roll main driving mechanisms can be symmetrical or asymmetrical.

In other embodiments of the rocking test stand: the axis of the second shaft and the axis of the first shaft may not be in the same horizontal plane, but in parallel horizontal planes.

In other embodiments of the rocking test stand: the mounting structure for mounting the device under test may also be a mounting hole or a mounting stud.

The above description is only a preferred embodiment of the present invention, and the patent protection scope of the present invention is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The swing test bed comprises an outer ring body (2) which is rotatably arranged on a concrete foundation or a bearing frame through a first rotating shaft (22), an inner skirt body (1) is arranged in the outer ring body (2), the inner skirt body (1) is rotatably arranged on the outer ring body (2) through a second rotating shaft (12), the axis of the second rotating shaft (12) and the axis of the first rotating shaft (22) are both positioned in a horizontal plane and are mutually perpendicular, and an installation structure for installing tested equipment is arranged on the inner skirt body (1); the swing test stand further comprises a group of rolling driving mechanisms (6) and a group of pitching driving mechanisms (4) which are arranged below the inner skirt body (1) and the outer ring body (2), wherein the group of rolling driving mechanisms (6) comprises two rolling main driving mechanisms (61) which are respectively positioned on two sides of the axis of the second rotating shaft (12), one ends of the two rolling main driving mechanisms (61) are respectively connected with the inner skirt body (1), and the other ends of the two rolling main driving mechanisms are respectively connected with a concrete foundation or a bearing frame, and the swing test stand is characterized in that: the group of pitching driving mechanisms (4) comprises two pitching main driving mechanisms (41) which are respectively positioned at two sides of the axis of the first rotating shaft (22), one ends of the two pitching main driving mechanisms (41) are respectively connected with the outer ring body (2), and the other ends of the two pitching main driving mechanisms are respectively connected with the concrete foundation or the bearing frame.

2. The rocking test stand of claim 1, wherein: the two main rolling driving mechanisms (61) are symmetrically arranged relative to the second rotating shaft (12), the two main rolling driving mechanisms (61) are arranged in the plane where the first rotating shaft (22) is located, one group of auxiliary rolling driving mechanisms (6) further comprises auxiliary rolling driving mechanisms (62) symmetrically arranged on two sides of each main rolling driving mechanism (61), one end of each auxiliary rolling driving mechanism (62) is connected with the inner skirt body (1), and the other end of each auxiliary rolling driving mechanism is connected with a concrete foundation or a bearing frame.

3. The rocking test stand of claim 2, wherein: the rolling main driving mechanism (61) and the connecting positions of the rolling auxiliary driving mechanisms (62) on the two sides of the rolling main driving mechanism and the inner skirt body (1) are arranged in a straight shape, and compared with the connecting positions of the concrete foundation or the bearing frame, the connecting positions of the rolling auxiliary driving mechanisms (62) on the two sides of the rolling main driving mechanism (61) and the concrete foundation or the bearing frame are closer to the axis of the second rotating shaft (12).

4. The rocking test stand of any one of claims 1 to 3, wherein: the two pitching main driving mechanisms (41) are symmetrically arranged relative to the first rotating shaft (22), the two pitching main driving mechanisms (41) are arranged in the plane where the second rotating shaft (12) is located, one group of pitching driving mechanisms (4) further comprises pitching auxiliary driving mechanisms (42) symmetrically arranged on two sides of each pitching main driving mechanism (41), one end of each pitching auxiliary driving mechanism (42) is connected with the outer ring body (2), and the other end of each pitching auxiliary driving mechanism is used for being connected with a concrete foundation or a bearing frame.

5. The rocking test stand of claim 4, wherein: the pitch main driving mechanism (41) and the connection positions of the pitch auxiliary driving mechanisms (42) on the two sides of the pitch main driving mechanism and the outer ring body (2) are arranged in a straight shape, and compared with the connection positions of the concrete foundation or the bearing frame, the connection positions of the pitch auxiliary driving mechanisms (42) on the two sides of the pitch main driving mechanism (41) and the concrete foundation or the bearing frame are closer to the axis of the first rotating shaft (22).

6. The rocking test stand of any one of claims 1 to 3, wherein: the inner skirt body (1) is of a closed box girder structure, a perforation (13) is arranged in the center of the inner skirt body (1), and the mounting structure is a mounting base (10) arranged at the hole opening at the upper end of the perforation (13).

7. The rocking test stand of any one of claims 1 to 3, wherein: the hanging basket (3) is fixed below the inner skirt body (1), a connecting structure used for being detachably connected with the hanging basket (3) is arranged on the lower surface of the inner skirt body (1), and the hanging basket (3) comprises a peripheral frame and a bottom plate fixed at the bottom of the peripheral frame.

8. The rocking test stand of any one of claims 1 to 3, wherein: the swing test stand further comprises a roll locking mechanism (9) and a pitching locking mechanism (5), wherein the roll locking mechanism (9) comprises a telescopic movable roll locking block arranged on the outer ring body (2), and the roll locking block is used for being in stop fit with the inner skirt body (1) after extending out so as to prevent the inner skirt body (1) from performing roll motion; the pitch lock mechanism (5) comprises a telescopically movable pitch lock (55) for mounting on a concrete foundation or carrier, the pitch lock (55) being adapted to be in stop engagement with the outer ring body (2) after extension to prevent pitch movement of the outer ring body (2).

9. The rocking test stand of claim 8, wherein: the rolling locking mechanism (9) further comprises a rolling fixed block fixed at the bottom of the inner skirt body (1), and blocking inclined planes for blocking and matching are respectively arranged on the rolling fixed block and the rolling locking block; the pitching locking mechanism (5) further comprises a pitching fixing block (56) fixed at the bottom of the outer ring body (2), and blocking inclined planes for blocking and matching are respectively arranged on the pitching fixing block (56) and the pitching locking block (55).

10. The rocking test stand of any one of claims 1 to 3, wherein: the two first rotating shafts (22) are respectively positioned at the two longitudinal ends of the outer ring body (2), and the two first rotating shafts (22) are respectively used for being in running fit with a concrete foundation or a bearing frame through first bearings; the two second rotating shafts (12) are respectively positioned at two transverse ends of the inner skirt body (1), and the two second rotating shafts (12) are respectively in running fit with the outer ring body (2) through second bearings; one of the two first bearings and the two second bearings is a fixed bearing, and the other is a floating bearing capable of axially moving.

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