Bearing frame body static force loading device

Abstract

The utility model discloses a static force loading device for a bearing frame body, and belongs to the technical field of experimental testing equipment. The device comprises a force bearing platform, a clamping assembly, a supporting frame assembly, a hydraulic loading mechanism and a loading control system. The clamping assembly is installed on the bearing platform, fixedly supports the front end and the rear end of the bearing frame body and enables the bearing frame body to be installed in a working condition state. The supporting frame assembly is installed above the front end of the bearing frame body and used for transferring the static pressure applied by the hydraulic loading mechanism to the bearing frame body. The hydraulic loading mechanism comprises a hydraulic cylinder used for applying vertically-downward static pressure to the supporting frame assembly, and the connecting position of the hydraulic cylinder and the supporting frame assembly is located at the loading mass center position. The loading control system is used for controlling pressurization of the hydraulic cylinder and monitoring the supporting force of the clamping assembly to the front end of the bearing frame body. According to the device, fixed-point static force loading is carried out on the frame body through the hydraulic loading mechanism, and the problems that in a static force loading test of an existing bearing frame body, the accuracy of the loading position is difficult to guarantee, and potential safety hazards exist are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of test equipment, and particularly relates to a static loading device for a bearing frame body. BACKGROUND

[0002] A certain bearing frame body is an important load-bearing component in a certain equipment product. The bearing frame body needs to bear the weight of 20.5 tons of equipment installed thereon and needs to realize reliable support during equipment transportation and use.

[0003] To ensure the reliability of the bearing frame body and avoid the bearing frame body from having insufficient bearing capacity due to production quality defects, causing the installed equipment thereon to be loose and fall, and the resulting safety problems, according to the production requirements of the bearing frame body, a static loading test needs to be performed on the bearing frame body after production. The simulated loading mass of the static loading test is 21 tons, which is slightly greater than the weight of the equipment to be supported by the bearing frame body. During loading, the installation state of the bearing frame body is consistent with the posture in the use condition, that is, the front end and the rear end of the bearing frame body are fixedly supported, the installation angle of the bearing frame body with the horizontal plane is 1.5° (the front end is higher than the rear end), the bearing frame body is supported at an angle of 21° with the horizontal plane, that is, 21t / sin21°=59t, the center of mass of the static loading is consistent with the center of mass of the equipment when the equipment is installed on the bearing frame body, and is located at the front end of the bearing frame body. The center of mass of the static loading is 4145mm away from the fixed support point at the rear end of the bearing frame body.

[0004] At present, the static loading test of the bearing frame body generally uses the method of loading lead plates or steel plates. This method needs to organize manual hoisting and loading, and it is difficult to ensure that 21 tons of lead plates or steel plates are not misaligned. The overall center of mass is easy to deviate, so it is difficult to ensure the accuracy of the loading position. In addition, the bearing frame body itself is inclined at an angle of 1.5 degrees with the horizontal plane. To avoid sliding, a fixed design for anti-sliding needs to be added. Taking steel plate loading as an example, each package of steel plates (containing 125 steel plates) weighs about 5.0 tons, and the outer dimensions are generally 2500x1250x220mm. To achieve 21 tons of loading, generally 5 packages of steel plates (4 whole packages plus 1 and a half packages to make up the weight) need to be stacked. The stacking height will exceed one meter, and it is difficult to ensure that the loaded steel plates are not misaligned. At the same time, manual hoisting and loading also have great safety hazards, with the risk of steel plates falling from a high place. In addition, due to manual hoisting, the steel plate packages need to be constantly hoisted and removed during the batch product static loading test, resulting in a long test process.

[0005] Therefore, the existing method of manually hoisting and loading steel plates or lead plates for static loading test of the frame body cannot ensure the accuracy of the loading position, has certain dangers, and has low test efficiency. SUMMARY

[0006] Technical problems to be solved:

[0007] In order to avoid the shortcomings of the prior art, the present application provides a static loading device for a bearing frame body, which is provided with a clamping assembly for mounting the bearing frame body to be tested to a working condition, and a hydraulic loading mechanism for performing point static loading on the frame body at a loading position of the bearing frame body, so as to solve the problems of difficulty in ensuring the accuracy of the loading position and safety hazards in the static loading test of the bearing frame body.

[0008] The technical scheme of the present application is as follows: a static loading device for a bearing frame body, comprising a bearing platform, a clamping assembly, a support frame assembly, a hydraulic loading mechanism and a loading control system.

[0009] The bearing platform is horizontally arranged; the clamping assembly is mounted on the bearing platform and used for fixing and supporting the front and rear ends of the bearing frame body to be tested, so as to support the bearing frame body to its working condition.

[0010] The support frame assembly is mounted above the front end of the bearing frame body, and its lower end is fixedly connected with the bearing frame body, and its upper end is connected with the force output end of the hydraulic loading mechanism, and the support frame assembly is used for transferring the static pressure applied by the hydraulic loading mechanism to the bearing frame body.

[0011] The hydraulic loading mechanism comprises a hydraulic cylinder for applying a vertical downward static pressure to the support frame assembly, and the extension end of the hydraulic cylinder serves as the force output end of the hydraulic loading mechanism, and the connection position of the hydraulic cylinder and the support frame assembly is located at the center of pressure of the pressure loading; the hydraulic cylinder is electrically connected with the loading control system.

[0012] The loading control system is used for controlling the pressure of the hydraulic cylinder and monitoring the supporting force of the clamping assembly on the front end of the bearing frame body.

[0013] A further technical scheme of the present application is as follows: the clamping assembly comprises a front support mechanism and a rear support seat, which are respectively used for supporting the front and rear ends of the bearing frame body.

[0014] The front support mechanism comprises a front fixed seat, a threaded shaft, a tension and compression force sensor and a flange shaft; the front fixed seat is fixedly mounted at one end of the bearing platform, and the front fixed seat is connected with one end of the threaded shaft through a first pin shaft; the other end of the threaded shaft is provided with an external thread and coaxially connected with one end of the tension and compression force sensor; the other end of the tension and compression force sensor is coaxially fixedly connected with one end of the flange shaft; the other end of the flange shaft is detachably fixedly connected with the bottom of the front end of the bearing frame body.

[0015] The rear support seat is provided with two, which are symmetrically mounted at the other end of the bearing platform relative to the front support mechanism, and are respectively used for fixedly supporting two connecting lugs at the rear end of the bearing frame body.

[0016] The further technical scheme of the present application is that the tension and pressure sensor is used for monitoring the axial pressure of the threaded shaft and the flange shaft; the tension and pressure sensor is electrically connected with the loading control system, and is used for feeding back the measured pressure data to the loading control system.

[0017] The further technical scheme of the present application is that when the bearing frame body is installed on the clamping assembly, the axis of the threaded shaft, the tension and pressure sensor and the flange shaft of the front supporting mechanism forms a 21° angle with the horizontal plane forward, and the angle between the bearing frame body and the horizontal plane forward is 1.5°.

[0018] The further technical scheme of the present application is that a limiting frame is installed between the front fixed seat and the rear supporting seat, one end of the limiting frame is welded and fixed with the front fixed seat, and the other end is welded and fixed with the rear supporting seat, and is used for limiting the distance between the front fixed seat and the rear supporting seat.

[0019] The further technical scheme of the present application is that a plurality of stop pieces are fixedly installed in the mounting groove of the bearing platform, are located on the side of the front fixed seat facing the rear supporting seat and the side of the rear supporting seat facing away from the front fixed seat, and are used for limiting the front fixed seat and the rear supporting seat from slipping along the bearing platform when the bearing frame body is under force loading.

[0020] The further technical scheme of the present application is that the supporting frame assembly comprises a steel frame, a bearing seat and a U-shaped support, the steel frame is a planar frame structure, one end of the steel frame is provided with a hollow part for embedding the front end protruding part of the bearing frame body, and the steel frame is fixedly installed on the bearing frame body through a U-shaped bolt; the bearing seat is installed above the middle part of the steel frame and is fixedly connected with the steel frame through the U-shaped support; the U-shaped support is provided with two U-shaped openings, is symmetrically fixed on the two sides of the bearing seat, the U-shaped opening of the U-shaped support faces the steel frame and straddles on one frame beam in the middle part of the steel frame, and the U-shaped support is fixedly connected with the frame beam through a fourth pin shaft; the middle part of the bearing seat is provided with a connecting seat with a double-ear structure, and is fixedly connected with the extension end of the hydraulic cylinder through a fifth pin shaft.

[0021] The further technical scheme of the present application is that the hydraulic loading mechanism further comprises a support, a cross beam and a hydraulic cylinder mounting seat; the support is provided with two groups and is symmetrically arranged on the two sides of the bearing platform, and the bottom of the support is fixedly grounded; the cross beam is horizontally arranged on the top of the two supports and is fixedly connected with the top of the support; the hydraulic cylinder mounting seat is fixedly arranged on the lower end face of the middle part of the cross beam and is used for installing the hydraulic cylinder; the hydraulic cylinder is vertically arranged above the connecting seat, the upper end of the hydraulic cylinder is fixedly connected with the hydraulic cylinder mounting seat, and the lower end of the hydraulic cylinder is the extension end and is fixedly connected with the connecting seat.

[0022] Further technical solutions of the present application are: the support and the cross beam are fixedly connected through connecting plates and bolts, the connecting plates are provided with four, are horizontally welded at the top of two supports and the bottom of two cross beams, the top surface of the connecting plate at the top of each support is butted with the bottom surface of the connecting plate at the bottom of the corresponding end cross beam, and is fixedly connected through a plurality of bolts.

[0023] Further technical solutions of the present application are: the loading control system comprises an oil cylinder control system and a tension and compression force sensor display system, the oil cylinder control system is used for controlling the pressurization of the hydraulic cylinder, and the tension and compression force sensor display system is used for displaying the pressure data measured by the tension and compression force sensor.

[0024] Beneficial effects

[0025] The beneficial effects of the present application are: the bearing frame static loading device of the present application installs the bearing frame to be measured on the bearing platform through the clamping assembly, simulates the use condition of the bearing frame, and realizes the stable support of the bearing frame. The hydraulic cylinder loading is adopted instead of the traditional steel plate and lead plate loading by arranging the hydraulic loading mechanism at the front end of the bearing frame, the support frame assembly is arranged at the loading area of the front end of the bearing frame, the hydraulic cylinder loading is connected to the bearing frame, and the controllable point loading of the force is realized. The loading control system is arranged at the same time, the loading force of the hydraulic cylinder is controlled, the support force of the front support mechanism can be monitored in real time, and the accuracy of the test loading force is ensured.

[0026] The loading device of the present application can stably bear the load applied to the bearing frame, the bearing frame and the clamping assembly are detachably connected, the support frame assembly and the bearing frame are detachably connected, and the support frame assembly and the telescopic end of the hydraulic cylinder are detachably connected, so that the bearing frame on the bearing platform can be quickly loaded and unloaded, and the quality damage of the bearing frame caused by the long loading process due to the frequent increase of the number of steel plates or lead plates during the loading of the steel plates or lead plates is avoided.

[0027] The present application designs the front support mechanism and the rear support seat which can place the bearing frame at a specific angle according to the requirement of the bearing frame loading test. The positions of the front support mechanism and the rear support seat are determined according to the overall length of the bearing frame to be measured, the installation angle requirement of the bearing frame under the working condition is met, the bearing frame, the front support mechanism, the rear support seat and the bearing platform form a fixed link structure, the quick loading and unloading requirement can be met when the bearing platform is connected and installed through the pin shaft, and rotation can be prevented. The pressure of the specific angle of the front support mechanism is fed back in real time through automatic pressurization of the hydraulic system, the pressure applied by the hydraulic system is compared, and the accuracy of the force is ensured. The static loading device of the structure can bear a large load and meet the test loading requirement. At the same time, the loading device can monitor the force parameters in real time during the test process, realizes the durability cycle test, the device is stable and reliable during use, the equipment is easy to maintain and has a long service life.

[0028] The present application realizes static loading by adopting a hydraulic loading mechanism, and realizes fixed-point loading along the extension axis of the hydraulic cylinder by connecting the supporting frame assembly to the bearing frame body, so that the loading centroid position is not deviated, the stability of loading is ensured, and the deviation of test results caused by unstable deviation of artificial hoisting lead plate or steel plate loading and the quality damage to the bearing frame body are avoided. At the same time, the high cost of special lead plate and steel plate is saved, and the labor cost in the test process is saved, the static loading test efficiency is improved, the test accuracy is ensured, and the safety of the test process is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is the mounting schematic view of the clamping assembly, the supporting frame assembly and the bearing frame body to be measured of the present application;

[0030] Figure 2 is the front view of the bearing frame static loading device of the present application;

[0031] Figure 3 is the front supporting mechanism of the present application;

[0032] Figure 4 is the rear supporting seat schematic view of the present application;

[0033] Figure 5 is the connection schematic view between the front supporting mechanism, the limiting frame and the rear supporting seat of the present application;

[0034] Figure 6 is the connection schematic view between the front supporting seat and the bearing platform of the present application;

[0035] Figure 7 is the structure schematic view of the bearing frame body to be measured;

[0036] Figure 8 is the connection schematic view between the bearing frame body to be measured and the front supporting mechanism;

[0037] Figure 9 is the structure schematic view of the supporting frame assembly of the present application;

[0038] Figure 10 is the sectional view of the supporting frame assembly of the present application;

[0039] Figure 11 is the bearing seat structure schematic view of the present application;

[0040] Figure 12 is the U-shaped supporting seat schematic view of the present application;

[0041] Figure 13 is the connection schematic view between the supporting frame assembly and the bearing frame body of the present application;

[0042] Figure 14 is a schematic view of the hydraulic loading mechanism structure of the present application;

[0043] Figure 15 is a displacement deformation nephogram of the static loading device of the present application when loading;

[0044] Figure 16 is a stress change nephogram of the static loading device of the present application when loading;

[0045] Figure 17 is a test method flow chart when loading test is carried out by the static loading device of the present application.

[0046] Explanation of reference signs:

[0047] 1. load platform, 11. T-shaped mounting groove, 12. T-shaped nut;

[0048] 2. clamping assembly, 21. front support mechanism, 211. front fixed seat, 212. threaded shaft, 213. tension and compression force sensor, 214. flange shaft, 215. first pin shaft, 216. cable, 217. third pin shaft, 22. rear support seat, 221. rear mounting bottom plate, 222. vertical plate, 223. second pin shaft, 23. limiting frame, 231. limiting rod, 232. reinforcing rod, 24. stop piece;

[0049] 3. support frame assembly, 31. steel frame, 311. hollow part, 312. frame beam in the middle of the steel frame, 32. load bearing seat, 321. connecting seat, 33. U-shaped support, 34. U-shaped bolt, 35. fourth pin shaft, 36. fifth pin shaft;

[0050] 4. hydraulic loading mechanism, 41. hydraulic cylinder, 42. support, 43. cross beam, 44. hydraulic cylinder mounting seat, 45. connecting plate, 46. grounding plate, 47. sixth pin shaft;

[0051] 5. loading control system, 51. oil cylinder control system, 52. tension and compression force sensor display system;

[0052] 6. load bearing frame, 61. rear end connecting lug of the load bearing frame, 62. front end protruding part of the load bearing frame, 63. front end mounting support of the load bearing frame, 64. backing plate; A. loading mass center position. DETAILED DESCRIPTION

[0053] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0055] Embodiment 1:

[0056] The present embodiment provides a bearing frame static loading device for static loading test of bearing frame 6, which installs bearing frame 6 to working condition, and completes static loading test of bearing frame 6 by hydraulic loading. The loading device of the present application can stabilize the frame load, and the bearing platform 1 cooperates with the clamping assembly 2 to realize quick disassembly and assembly of the bearing frame 6. The hydraulic loading mechanism 4 cooperates with the loading control system 5 to realize point static loading and load monitoring in the loading process, so that the device is stable and reliable. Through the static loading test of the bearing frame 6 by the device, the problems of low test efficiency and safety hazards caused by the difficulty in ensuring the loading position accuracy in the static loading test of the existing bearing frame by hoisting steel plate and lead plate can be solved, the reliability and stability of the test process are improved, and the test cost is reduced.

[0057] Referring to Figure 1 , 2 , the bearing frame static loading device of the present application comprises a bearing platform 1, a clamping assembly 2, a support frame assembly 3, a hydraulic loading mechanism 4 and a loading control system 5.

[0058] The bearing platform 1 is a cast platform with a T-shaped mounting groove 11, which is used to install the bearing frame 6 in cooperation with the clamping assembly 2 and bear the load in the test process. The bearing platform 1 is horizontally arranged, and the clamping assembly 2 is installed by bolts and T-shaped nuts 12 matched with the T-shaped mounting groove 11 of the bearing platform 1.

[0059] Referring to Figures 3-8 , the clamping assembly 2 is installed on the bearing platform 1 and used to fix the front and rear ends of the bearing frame 6 to be tested and support the bearing frame 6 to its working condition. Specifically, the clamping assembly 2 comprises a front support mechanism 21 and a rear support seat 22, the front support mechanism 21 is used to support the front end of the bearing frame 6, and the rear support seat 22 is used to support the rear end of the bearing frame 6.

[0060] The front supporting mechanism 21 comprises a front fixed seat 211, a threaded shaft 212, a tension and compression force sensor 213 and a flange shaft 214. The front fixed seat 211 is a double-ear plate fixed seat structure, the bottom of which is a front mounting bottom plate, which is fixed to the load bearing platform 1 through bolts and T-shaped nuts 12 matched with the load bearing platform 1 and located at the middle position of the front end of the load bearing platform 1. The double-ear plates of the fixed seat 211 are parallel to each other and perpendicular to the front mounting bottom plate of the bottom, and a first pin hole is horizontally arranged on the double-ear plates of the fixed seat 211 for connecting through a first pin shaft 215 and one end of the threaded shaft 212.

[0061] One end of the threaded shaft 212 is a single-insert-ear structure matched with the double-ear plates of the fixed seat 211, which is inserted between the double-ear plates of the fixed seat 211 and connected through the horizontal installation of the first pin shaft 215, and the first pin shaft 215 is fixed after being installed in place by a corresponding elastic retainer ring. The other end of the threaded shaft 212 is an external thread structure, and the external thread end of the threaded shaft 212 is coaxially connected with one end of the tension and compression force sensor 213.

[0062] One end of the tension and compression force sensor 213 is an internal thread structure for connecting with the threaded shaft 212. The end face of the other end of the tension and compression force sensor 213 is uniformly distributed with a plurality of threaded holes for coaxially installing the flange shaft 214. The tension and compression force sensor 213 is used for monitoring the axial pressure of the threaded shaft 212 and the flange shaft 214, and is electrically connected with the loading control system 5 through a cable 216 to feed back the measured pressure data to the loading control system 5.

[0063] One end of the flange shaft 214 is a flange structure, and the flange connecting hole of this end is matched with the plurality of threaded holes arranged on the circumference of one end of the tension and compression force sensor 213, and the two are fixedly connected through screws. The other end of the flange shaft 214 is a single-insert-ear structure, and the single-insert-ear end of the flange shaft 214 is detachably fixedly connected with the bottom of the front end of the measured load bearing frame body 6 through a third pin shaft 217. A double-ear structure front end mounting support 63 of the load bearing frame body is arranged at the middle position of the bottom of the front end of the load bearing frame body 6 for supporting and mounting the front end of the load bearing frame body 6, and the single-insert-ear end of the flange shaft 214 is detachably fixedly connected with the front end mounting support 63 of the load bearing frame body through the third pin shaft 217 after being inserted into the front end mounting support 63 of the load bearing frame body. The third pin shaft 217 is fixed after being installed in place by a corresponding elastic retainer ring.

[0064] Two rear support seats 22 are symmetrically installed at the rear end of the force bearing platform 1 relative to the front support mechanism 21, and are respectively used for fixing two connecting lugs at the rear end of the bearing frame body 6. The rear support seat 22 comprises a rear mounting bottom plate 221 and a vertical plate 222. The rear mounting bottom plate 221 is fixed to the force bearing platform 1 by bolts and T-shaped nuts 12 matched with the force bearing platform 1. The two vertical plates 222 are parallel and are fixed perpendicularly to the rear mounting bottom plate 221. Second pin holes are horizontally arranged on the two vertical plates 222 for penetrating the second pin shaft 223. The two rear support seats 22 correspond to the two connecting lugs 61 at the rear end of the bearing frame body, and the connecting lugs 61 at the rear end of the bearing frame body are inserted into the two vertical plates 222 of the corresponding rear support seat 22 and penetrate the second pin shaft 223, so as to realize the fixed support of the rear end of the bearing frame body 6 by the rear support seat 22. After the second pin shaft 223 is installed in place, it is fixed by the corresponding elastic retaining ring.

[0065] The bearing frame body 6 to be tested is installed in the simulated working condition state by the front support mechanism 21 and the two rear support seats 22. As shown in Figure 1 The axis of the threaded shaft 212, the tension and pressure sensor 213 and the flange shaft 214 of the front support mechanism 21 forms a 21° angle with the horizontal plane in the forward direction, and the bearing frame body 6 forms a 1.5° angle with the horizontal plane in the forward direction.

[0066] Referring to Figures 9-13 The support frame assembly 3 is installed above the front end of the bearing frame body 6 and is located in the loading area of the bearing frame body 6. The lower end of the support frame assembly 3 is fixedly connected with the bearing frame body 6, and the upper end is connected with the force output end of the hydraulic loading mechanism 4. The support frame assembly 3 is used for stably connecting the vertical static pressure applied by the hydraulic loading mechanism 4 to the bearing frame body 6.

[0067] Specifically, the support frame assembly 3 comprises a steel frame 31, a force bearing seat 32 and a U-shaped support 33. The steel frame 31 is a planar frame structure and has a rectangular shape and is composed of a plurality of frame beams arranged perpendicularly to each other. One end of the steel frame 31 is provided with a hollow part 311 for embedding the front end protruding part 62 of the bearing frame body. The steel frame 31 is fixedly installed on the bearing frame body 6 by the U-shaped bolts 34. In order to ensure that the steel frame 31 is stably installed on the same plane of the bearing frame body 6, a pad 64 is installed on both sides of the main beam of the bearing frame body 6 and is in surface contact with the bottom surface of the steel frame 31.

[0068] The load-bearing seat 32 is installed at the upper center of the steel frame 31 and is fixedly connected to the steel frame 31 via U-shaped supports 33. The bottom of the load-bearing seat 32 mates with the profile of the steel frame 31, forming a mounting plate structure with a protruding center and recessed sides. U-shaped supports 33 are symmetrically fixed to the recessed areas on both sides of the load-bearing seat 32 to secure it to the steel frame 31. Two U-shaped supports 33 are inverted, with their U-shaped openings facing the steel frame 31 and straddling a frame beam 312 in the middle of the steel frame. The U-shaped supports 33 are fixedly connected to the frame beam 312 via a fourth pin 35. A connecting seat 321 with a double-ear structure is provided in the protruding area of ​​the load-bearing seat 32, which is fixedly connected to the force output end of the hydraulic loading mechanism 4 via a fifth pin 36. In this embodiment, the load-bearing seat 32 is an integral structure, and the connecting seat 321 and the mounting plate at the bottom of the load-bearing seat 32 are an integral structure. The U-shaped support 33 is embedded in the mounting plate at the bottom of the bearing seat 32 at one end facing away from its opening, and is welded and fixed thereto. The connecting seat 321 above the bearing seat 32 determines the position of the center of gravity of static loading. When the support frame assembly 3 and the bearing frame 6 to be tested are installed in place, the distance between the mounting hole of the fifth pin 36 of the connecting seat 321 and the rear support point of the bearing frame 6 (i.e., the second pin 223 at the rear support seat 22) is the distance of the center of gravity of static loading from the fixed support point at the rear end of the bearing frame, which is 4145mm.

[0069] Because the front support mechanism 21 forms a 21° angle with the horizontal plane and the load-bearing frame 6 forms a 1.5° angle with the horizontal plane, in order to prevent the front support mechanism 21, the rear support base 22, and the load-bearing frame 6 from collapsing when the hydraulic loading mechanism 4 applies force to the center of gravity position A, Figure 1 As shown, the sliding to the right is limited in this embodiment by a limit bracket 23 between the front support mechanism 21 and the rear support seat 22, and by multiple stops 24. Figure 5 As shown, the limiting frame 23 is a frame structure assembled from two limiting rods 231 and two reinforcing rods 232. The length of the two limiting rods 231 is the distance between the front fixed seat 211 and the rear support seat 22 of the front support mechanism 21. The two limiting rods 231 are arranged in parallel, with one end welded to the front mounting plate at the bottom of the front fixed seat 211 and the other end welded to the rear mounting plate of the rear support seat 22. The two reinforcing rods 232 are perpendicular to the two limiting rods 231 and fixed between the two limiting rods 231, connecting them into a whole. The limiting frame 23 limits the distance between the front support mechanism 21 and the rear support seat 22, which can prevent the front support mechanism 21 from sliding towards the rear support seat 22 when under force. Multiple stops 24 are fixedly installed in the mounting slots 11 of the load-bearing platform 1, located respectively on the side of the front fixed seat 211 facing the rear support seat 22 and on the side of the rear support seat 22 facing away from the front fixed seat 211. The stops 24 further restrict the movement of the front fixed seat 211 and the rear support seat 22 along the load-bearing platform 1 when the load-bearing frame 6 is subjected to load. Figure 1The rightward sliding is shown. After the installation of the bearing frame body 6 is completed, because the bearing frame body 6, the front support mechanism 21 and the rear support seat 22 have fixed lengths, the installation spacing of the front support mechanism 21 and the rear support seat 22 on the bearing platform 1 is fixed, so that the bearing frame body 6, the front support mechanism 21, the rear support seat 22 and the bearing platform 1 form a fixed linkage structure, and the anti-rotation measures at the corresponding pin shaft connections are omitted.

[0070] Referring to Figure 2 、 14 , the hydraulic loading mechanism 4 comprises a hydraulic cylinder 41, a support 42, a cross beam 43 and a hydraulic cylinder mounting seat 44. The support 42 is provided with two groups and is symmetrically arranged on both sides of the bearing platform 1. The support 42 is specifically in the shape of A, and two feet at the bottom of the support 42 are each welded with a grounding plate 46 arranged horizontally, and the support 42 is fixed to the ground by penetrating the grounding plate 46 with foundation bolts. The cross beam 43 is horizontally arranged on the top of the two supports 42 and is fixedly connected with the top of the support 42. Specifically, the support 42 and the cross beam 43 are fixedly connected through connecting plates 45 and bolts. The connecting plates 45 are provided with four, which are respectively horizontally welded on the top of the two supports 42 and the bottom surface of the two ends of the cross beam 43. The top surface of the connecting plate 45 at the top of each support 42 is butted with the bottom surface of the connecting plate 45 at the bottom of the corresponding end of the cross beam 43, and is fixedly connected through a plurality of bolts. The hydraulic cylinder mounting seat 44 is fixed to the lower end surface of the middle of the cross beam 43 and is used for mounting the hydraulic cylinder 41. The hydraulic cylinder mounting seat 44 is a double lug fixing seat structure, the upper end of which is a mounting plate, which is fixedly welded with the cross beam 43, and the double lug openings of which are downward, connected with the fixed end of the hydraulic cylinder 41 through the sixth pin shaft 47. The hydraulic cylinder 41 is vertically arranged and located directly above the connecting seat 321 of the bearing seat 32. The upper end, i.e. the fixed end of the hydraulic cylinder 41 is fixedly connected with the hydraulic cylinder mounting seat 44, and the lower end of the hydraulic cylinder 41 is the telescopic end, which is fixedly connected with the connecting seat 321 through the fifth pin shaft 36 as the force output end of the hydraulic loading mechanism. The hydraulic cylinder 41 is used for applying a vertical downward static pressure to the support frame assembly 3, the connection between the hydraulic cylinder 41 and the connecting seat 321 of the bearing seat 32 is located at the center of pressure of the pressure loading, and the fixed point pressure on the bearing frame body 6 is realized. The hydraulic cylinder 41 is electrically connected with the loading control system 5 and is controlled by the loading control system 5.

[0071] In order to ensure the connection stability of the support 42 and the cross beam 43, a plurality of reinforcing rib plates are welded at the welding positions of the connecting plate 45 and the support 42 and the welding positions of the connecting plate 45 and the cross beam 43, so as to meet the connection strength requirement. Meanwhile, a plurality of reinforcing rib plates are also welded at the welding positions of the grounding plate 46 and the feet of the support 42, and a plurality of reinforcing rib plates are welded at the welding positions of the mounting plate of the hydraulic cylinder mounting seat 44 and the cross beam 43, so as to meet the connection strength requirement of the two welded parts.

[0072] The loading control system 5 is used for controlling the pressurization of the hydraulic cylinder 41 and monitoring the support force of the clamping assembly 2 on the front end of the bearing frame 6. The loading control system 5 comprises a cylinder control system 51 and a tension and pressure sensor display system 52. The cylinder control system 51 is used for controlling the pressurization of the hydraulic cylinder 41, and the tension and pressure sensor display system 52 is used for displaying the pressure data measured by the tension and pressure sensor 213. Through the loading control system 5, the force parameter monitoring during the static loading test of the bearing frame 6 is realized. In this embodiment, the pressure value of the hydraulic cylinder 41 is ensured to be 21t, and the corresponding support force of the front support mechanism 21 is 59t, thereby ensuring the accuracy of the test.

[0073] Embodiment 2:

[0074] This embodiment provides a method for performing a static loading test of a bearing frame 6 by using the static loading device for a bearing frame of embodiment 1. The flowchart of the method is shown in Figure 17

[0075] S1: stably connect the loading device and the frame:

[0076] First, fill the T-shaped nuts 12 into the T-shaped installation grooves 11 in the bearing platform 1, pass the transition holes reserved in the front installation bottom plate of the front fixed seat 211 through the bolts, and insert the corresponding T-shaped nuts to fixedly connect the front fixed seat 211 and the bearing platform 1. Pass the transition holes reserved in the rear installation bottom plate 221 of the rear support seat through the bolts, and insert the corresponding T-shaped nuts to fixedly connect the rear support seat 22 and the bearing platform 1. As shown in the right side of Figure 1 , insert the plug stopper 24, and use the limiting frame 23 to connect the front fixed seat 211 and the rear support seat 22 as a whole, thereby realizing the tight connection of the bearing platform 1, the front fixed seat 211, and the rear support seat 22, and preventing slipping during the test pressurization.

[0077] After aligning the front end and the rear end of the bearing frame 6 with the front support mechanism 21 and the rear support seat 22, respectively, the front end installation support 63 of the bearing frame is connected with the flange shaft 214 of the front support mechanism 21 through the third pin shaft 217. After the third pin shaft 217 is inserted into place, the corresponding elastic retaining ring for shaft is installed to fix it. The rear end connecting lug 61 of the bearing frame is connected with the corresponding side of the rear support seat 22 through the second pin shaft 223. After the second pin shaft 223 is inserted into place, the corresponding elastic retaining ring for shaft is installed to fix it.

[0078] ​The support frame assembly 3 is installed on the bearing frame body 6, so that the front end protrusion 62 of the bearing frame body is inserted into the hollow part 311 at the front end of the steel frame 31, and the inner wall at the front end of the hollow part is tightly attached to the front end surface of the bearing frame body 6. The bottom surface of the steel frame 31 is attached to the base plate 64 installed on the main beam of the bearing frame body 6, and the U-shaped bolt 34 is used to connect the main beam of the bearing frame body 6 and the main beam of the steel frame 31, so that the two are fixedly connected, and the front and rear movement of the steel frame 31 during the test loading process is prevented.

[0079] The installation position of the hydraulic loading mechanism 4 is determined, and the grounding plate 46 of the hydraulic loading mechanism 4 is connected with the anchor bolt. S2: The hydraulic loading mechanism 4 is used for pressure loading.

[0080] The oil cylinder control system 51 provides oil pressure, the hydraulic cylinder 41 moves vertically downward, and after the connecting hole of the hydraulic cylinder 1 and the connecting seat 321 on the bearing seat 32 are aligned, the fifth pin shaft 36 is used to fixedly connect the lower end of the hydraulic cylinder 41 and the connecting seat 321 above the bearing seat 32. Continue to increase the oil pressure, and when the pressure of the hydraulic cylinder 41 reaches 21t, the pressure measured by the tension and pressure sensor display system 52 is observed, and when it reaches 59t, it is maintained for two minutes.

[0081] S3: The hydraulic cylinder 41 is depressurized.

[0082] The oil cylinder control system 51 is used to reduce the oil pressure, and when the pressure of the hydraulic cylinder 41 is reduced to 15t, the loading in step S2 is repeated again after three minutes, that is, the hydraulic cylinder 41 is controlled to be pressurized, and when the pressure of the hydraulic cylinder 41 reaches 21t, the pressure measured by the tension and pressure sensor display system 52 is observed, and when it reaches 59t, it is maintained for two minutes. Three loading tests are completed in turn, and the static loading test is completed.

[0083] After step S3 is completed, the bearing frame body 6 can be removed, and the detection process is performed to detect and judge the quality after the static test.

[0084] The support strength and stability of the loading device in the above experimental process fully meet the experimental requirements, Figure 15 is a displacement deformation cloud diagram of the static loading device of the bearing frame body of the application during loading, Figure 16 is a stress change cloud diagram of the static loading device of the bearing frame body of the application during loading, as Figure 16 shown, in this embodiment, the material of the loading device is Q355 steel, the safety factor is 2.0, and when the hydraulic cylinder 41 is set to apply a pressure of 50t, the maximum stress is 248.17Mpa, which is located at the rib plate on both sides of the cross beam 43, and is lower than the yield strength of the material; as Figure 15 shown, the maximum displacement deformation is less than 2.0mm, which is located at the contact position of the support frame assembly 3 and the bearing frame body 6, and belongs to elastic deformation. It can be seen that the loading device fully meets the test support strength requirement.

[0085] Compared with the traditional test method, the loading device has high loading precision. The pressure and flow of hydraulic oil can be accurately controlled to achieve very fine and smooth loading, ensuring the accuracy of the force applied to the equipment, which helps to improve the quality and reliability of the test. The degree of automation is high. The hydraulic system can realize the automatic loading process, reducing the dependence on manpower and improving the work efficiency. The safety is enhanced. The hydraulic system can quickly respond when encountering abnormal situations, such as overload protection, emergency stop, etc., thereby greatly improving the safety of operation. At the same time, direct manual intervention is reduced, and the risk of worker injury is also reduced. The adaptability and repeatability are strong. The hydraulic loading device can usually provide a larger range of force, suitable for various loading scenarios (static loading, cyclic loading, etc.), and can ensure the consistency and stability of each loading. The loading device is mainly applied to the static loading test of a certain bearing frame equipment in the field of aerospace, which has high reliability requirements. At the same time, for other specifications of bearing frames with similar working conditions, the static loading test can also be carried out using the loading device of the present application. By adjusting the installation distance between the front support mechanism and the rear support seat, the test requirements can be met.

[0086] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. A static loading device for a load carrier body, characterized in that The test device comprises a bearing platform, a clamping assembly, a support frame assembly, a hydraulic loading mechanism and a loading control system. The bearing platform is horizontally arranged. The clamping assembly is installed on the bearing platform and used for fixing the front and rear ends of the support frame body to be tested and supporting the support frame body to its working condition. The support frame assembly is installed above the front end of the support frame body and fixedly connected with the support frame body at its lower end and connected with the force output end of the hydraulic loading mechanism at its upper end. The hydraulic loading mechanism comprises a hydraulic cylinder used for applying vertical downward static pressure to the support frame assembly.

2. The loading device of claim 1, wherein the loading device is configured to apply a load to the test object in a direction that is substantially parallel to the longitudinal axis of the test object. The loading control system is used for controlling the pressure of the hydraulic cylinder and monitoring the support force of the clamping assembly on the front end of the support frame body. The clamping assembly comprises a front support mechanism and a rear support seat used for supporting the front and rear ends of the support frame body respectively. The front support mechanism comprises a front fixed seat, a threaded shaft, a tension and pressure sensor and a flange shaft.

3. The loading device of claim 2, wherein the plurality of rollers are arranged in a circular pattern. The front fixed seat is fixedly installed at one end of the bearing platform and connected with one end of the threaded shaft through a first pin shaft.

4. The loading device of claim 2, wherein the plurality of rollers are arranged in a circular pattern. The other end of the threaded shaft is provided with external threads and coaxially connected with one end of the tension and pressure sensor through threads.

5. The loading device of claim 2, wherein: The other end of the tension and pressure sensor is coaxially fixedly connected with one end of the flange shaft.

6. The loading device of claim 2, wherein: The other end of the flange shaft is detachably fixedly connected with the bottom of the front end of the support frame body. The rear support seat is provided with two and symmetrically installed at the other end of the bearing platform relative to the front support mechanism and used for fixedly supporting two connecting lugs at the rear end of the support frame body. The tension and pressure sensor is used for monitoring the axial pressure of the threaded shaft and the flange shaft and electrically connected with the loading control system for feeding back the measured pressure data to the loading control system. When the support frame body is installed on the clamping assembly, the axis of the threaded shaft, the tension and pressure sensor and the flange shaft of the front support mechanism forms a 21° angle with the horizontal plane forwardly and the support frame body forms a 1.5° angle with the horizontal plane forwardly. A limiting frame is installed between the front fixed seat and the rear support seat and welded with the front fixed seat at one end and welded with the rear support seat at the other end for limiting the distance between the front fixed seat and the rear support seat. A plurality of stop pieces are fixedly installed in the mounting groove of the bearing platform and located at the side of the front fixed seat facing the rear support seat and the side of the rear support seat facing away from the front fixed seat for limiting the sliding of the front fixed seat and the rear support seat along the bearing platform under the force loading of the support frame body.

7. The loading device of claim 1, wherein: The support frame assembly comprises a steel frame, a bearing seat and a U-shaped support, the steel frame is a planar frame structure, one end of which is provided with a hollow part for embedding a front end protruding part of a bearing frame body, and the steel frame is fixedly installed on the bearing frame body through a U-shaped bolt; the bearing seat is installed on the upper middle part of the steel frame and is fixedly connected with the steel frame through a U-shaped support; the U-shaped support is provided with two U-shaped supports which are symmetrically fixed on the two sides of the bearing seat, the U-shaped opening of the U-shaped support faces the steel frame and straddles on a frame beam in the middle part of the steel frame, and the U-shaped support is fixedly connected with the frame beam through a fourth pin shaft; the middle part of the bearing seat is provided with a connecting seat with a double-ear structure for fixed connection with the fifth pin shaft and the telescopic end of the hydraulic cylinder.

8. The loading device of claim 7, wherein the plurality of rollers are arranged in a circular pattern. The hydraulic loading mechanism further comprises a support, a cross beam and a hydraulic cylinder mounting seat; the support is provided with two groups which are symmetrically arranged on the two sides of the bearing platform, and the bottom thereof is fixedly grounded; the cross beam is horizontally arranged on the top of the two supports and is fixedly connected with the top of the support; the hydraulic cylinder mounting seat is fixedly arranged on the lower end surface of the middle part of the cross beam for mounting the hydraulic cylinder; the hydraulic cylinder is vertically arranged above the connecting seat, the upper end of the hydraulic cylinder is fixedly connected with the hydraulic cylinder mounting seat, and the lower end of the hydraulic cylinder is a telescopic end which is fixedly connected with the connecting seat.

9. The loading device of claim 8, wherein the plurality of rollers are arranged in a circular pattern. The support and the cross beam are fixedly connected through connecting plates and bolts, the connecting plates are provided with four, which are respectively horizontally welded on the top end of the two supports and the bottom surface of the two ends of the two cross beams, the top surface of the connecting plate of each support top end is butted with the bottom surface of the connecting plate of the corresponding end cross beam bottom, and they are fixedly connected through a plurality of bolts.

10. The loading device of claim 1, wherein: The loading control system comprises a cylinder control system and a tension and pressure sensor display system, the cylinder control system is used for controlling the pressurization of the hydraulic cylinder, and the tension and pressure sensor display system is used for displaying the pressure data measured by the tension and pressure sensor.

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