Test Components

Abstract

The present invention provides a test assembly, which is used to test a turntable of an engineering machinery. The test assembly includes a first support assembly, a second support assembly, a load assembly, a drive assembly and a base; the base is arranged between the first support assembly and the second support assembly, and is used to support the turntable; the load assembly is connected to the first support assembly, and is used to apply a load to the turntable; the drive assembly is connected to the second support assembly, and is used to drive the turntable to rotate. Since the test assembly can test the turntable of the engineering machinery alone when testing the service life of the turntable of the engineering machinery, and the engineering machinery does not need to be involved in the test, the difficulty of testing the life of the turntable is reduced, and the test of the life of the turntable is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel boring machines, and in particular to a testing component. Background Art

[0002] At present, with the development of the coal mining industry, roadheaders have become the main equipment for the development of coal mine tunnels, and customers have continuously increased their requirements for the quality of roadheaders. In order to improve the quality of roadheaders, various performance parameters of roadheaders will be tested.

[0003] In the related art, when performing a life test on the turntable of a tunnel boring machine, it is necessary to test the entire tunnel boring machine. Due to the large size of the tunnel boring machine, it is difficult to test the tunnel boring machine. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the present invention proposes a test component.

[0006] In view of this, the present invention provides a test assembly, which is used to test a turntable of engineering machinery. The test assembly includes a first support assembly, a second support assembly, a load assembly, a drive assembly and a base; the base is arranged between the first support assembly and the second support assembly, and is used to support the turntable; the load assembly is connected to the first support assembly, and is used to apply a load to the turntable; the drive assembly is connected to the second support assembly, and is used to drive the turntable to rotate.

[0007] The test assembly provided by the present invention can simulate the load generated by the cutting head through the load assembly when the turntable needs to be tested, and apply the load to the turntable, and drive the turntable to rotate through the drive assembly to simulate the working state of the turntable, thereby realizing the life test of a single turntable.

[0008] Since the test component can test the turntable of the engineering machinery alone when testing the service life of the turntable of the engineering machinery without the need for the entire engineering machinery to participate in the test, the difficulty of the turntable life test is reduced, making the turntable life test more convenient.

[0009] Furthermore, the load generated by the cutting head is simulated by the load component, and the turntable is driven to work by the drive component, so that the structure of the test component is relatively simple and the cost of the test component is reduced.

[0010] Specifically, the turntable includes a rotating body and a pin ear. When testing the turntable, the load assembly is connected to the pin ear to apply a load to the turntable, and the drive assembly is connected to the pin ear to drive the rotating body to rotate.

[0011] In addition, the test component in the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In one technical solution of the present invention, the load assembly includes a connecting component, a load component and at least one first oil cylinder; the connecting component is connected to the first support assembly; one end of the load component is hinged to the connecting component, and the other end is used to be hinged to the cutting part connecting structure of the turntable; one end of the at least one first oil cylinder is hinged to the connecting component, and the other end is used to be hinged to the lifting cylinder connecting structure of the turntable.

[0013] In this technical solution, when the turntable is tested, the connecting component is fixed on the first supporting assembly, the two ends of the load component are respectively hinged to the connecting component and the turntable, and the two ends of the first oil cylinder are also respectively hinged to the connecting component and the turntable. When the first oil cylinder outputs a certain thrust, the thrust will react on the turntable under the action of the first supporting assembly and the connecting component, thereby realizing the application of load to the turntable.

[0014] By adjusting the first oil cylinder and the connecting parts up and down, combined with the rotation frequency adjustment, it is possible to simulate different working postures in a wide range of angles for loading. It effectively simulates the cutting working posture of the tunnel boring machine and accurately reproduces the stress state of the test sample. The load component can simulate different working postures from 0 to 58 degrees for loading.

[0015] The first cylinder can be replaced by a servo-hydraulic actuator of the same load rating.

[0016] The load assembly also includes a first articulated shaft and two first retaining rings. The first articulated shaft is inserted into the first oil cylinder and the connecting component, and the two first retaining rings are respectively sleeved on both ends of the first articulated shaft.

[0017] In one technical solution of the present invention, the first support component is provided with a plurality of first mounting holes, and the plurality of first mounting holes are arranged in an array along the height direction of the first support component; a plurality of second mounting holes are provided on the connecting component; the first support component and the connecting component are fixedly connected by first bolts passing through the plurality of second mounting holes and some of the first mounting holes among the plurality of first mounting holes.

[0018] In this technical solution, the second mounting hole can cooperate with different first mounting holes, so that the connecting component can change its position in the vertical direction relative to the first supporting component, and the load component can adjust the height according to test needs, making the test component more applicable.

[0019] In one technical solution of the present invention, the driving assembly includes at least two second oil cylinders, one end of the at least two second oil cylinders is connected to the second supporting assembly, and the other end is used for hinged connection with the rotary oil cylinder connection structure of the turntable.

[0020] In this technical solution, when testing the turntable, at least two second oil cylinders are respectively hinged to the turntable, and at least two second oil cylinders respectively apply thrust or pull in different directions to the turntable, thereby driving the turntable to reciprocate, so as to simulate the actual working state of the turntable, thereby realizing the test of the life of the turntable.

[0021] Specifically, the number of the second oil cylinders is two.

[0022] The second cylinder can be replaced by a servo-hydraulic actuator of the same load rating.

[0023] In one technical solution of the present invention, the test assembly also includes an articulated seat and a plurality of second bolts; one end of at least two second oil cylinders is connected to the second support assembly through the articulated seat, and a plurality of third mounting holes are provided on the articulated seat; a plurality of fourth mounting holes are provided on the second support assembly, and the plurality of fourth mounting holes are arranged in an array along the height direction of the second support assembly; the articulated seat and the second support assembly are fixedly connected by second bolts that pass through the plurality of third mounting holes and some of the fourth mounting holes among the plurality of fourth mounting holes.

[0024] In this technical solution, the third mounting hole can be matched with a different fourth mounting hole, so that the articulated seat can change its position in the vertical direction relative to the second support assembly, and the height of the second cylinder can be adjusted according to the height of the turntable, making the test assembly more applicable.

[0025] In a technical solution of the present invention, the second support assembly includes at least two support components, and the at least two support components are arranged in parallel and are respectively connected to at least two second oil cylinders.

[0026] In this technical solution, the second support assembly includes at least two support components, and the at least two support components are arranged in parallel and respectively support the second oil cylinder, thereby improving the stability of the support for the second oil cylinder.

[0027] The driving assembly also includes two articulated seats, two second articulated shafts and four second retaining rings. The two articulated seats are respectively connected to the two supporting components. Each second articulated shaft is passed through a supporting component and a second oil cylinder. The two second retaining rings are respectively sleeved on both sides of the second articulated shaft.

[0028] The second supporting component may also be an integral supporting component.

[0029] In a technical solution of the present invention, the test assembly further includes an oil supply assembly, which is respectively connected to at least one first oil cylinder and at least two second oil cylinders to drive the at least one first oil cylinder and the at least two second oil cylinders.

[0030] In this technical solution, the oil supply assembly delivers hydraulic oil to the first oil cylinder and the second oil cylinder, thereby achieving control over the first oil cylinder and the second oil cylinder, so as to control the magnitude of the force output by the first oil cylinder and the second oil cylinder according to test requirements.

[0031] In one technical solution of the present invention, the test component also includes an oil tank, and the oil supply component includes an oil inlet pipeline, an oil pump, a first reversing valve and an oil return pipeline; the oil inlet pipeline is connected to the oil tank; the oil pump is arranged on the oil inlet pipeline; the first end of the first reversing valve is connected to the oil inlet pipeline, the second end of the first reversing valve is connected to the rodless chamber of at least one first oil cylinder, and the third end of the first reversing valve is connected to the rod chamber of at least one first oil cylinder; the oil return pipeline is connected to the fourth end of the first reversing valve and is connected to the oil tank.

[0032] In this technical solution, the oil pump is arranged on the oil inlet pipeline, and the hydraulic oil in the oil tank is delivered to the first oil cylinder and the second oil cylinder. The first reversing valve can control the oil inlet and outlet direction of the first oil cylinder, and then control the extension or retraction of the piston of the first oil cylinder to realize the control of the first oil cylinder.

[0033] Specifically, when the turntable is tested, oil is introduced into the rodless chamber of the first oil cylinder, and the piston of the first oil cylinder extends, thereby applying a load to the turntable.

[0034] In one technical solution of the present invention, the oil supply assembly also includes a second reversing valve, a first end of the second reversing valve is connected to the oil inlet pipeline, a second end of the second reversing valve is connected to the rodless chamber of one of the at least two second oil cylinders, and is connected to the rod chamber of another of the at least two second oil cylinders, a third end of the second reversing valve is connected to the rod chamber of one of the at least two second oil cylinders, and is connected to the rodless chamber of another of the at least two second oil cylinders, and a fourth end of the second reversing valve is connected to the oil return pipeline.

[0035] In this technical solution, the second reversing valve can control the oil inlet and outlet directions of the second oil cylinder, and further control the extension or retraction of the piston of the second oil cylinder to achieve control over the second oil cylinder.

[0036] Specifically, the number of second oil cylinders is two, the second end of the second reversing valve is connected to the rodless chamber of one of the two second oil cylinders, and is connected to the rod chamber of the other of the two second oil cylinders, the third end of the second reversing valve is connected to the rod chamber of one of the two second oil cylinders, and is connected to the rodless chamber of the other of the two second oil cylinders, so that the movement directions of the pistons of the two second oil cylinders are opposite, and thus the two second oil cylinders can drive the turntable to rotate.

[0037] Specifically, the first reversing valve and the second reversing valve are electrically controlled proportional reversing valves.

[0038] In one technical solution of the present invention, the oil supply assembly also includes an overflow valve and a throttle valve; one end of the overflow valve is connected to the oil inlet pipeline, and the other end is connected to the oil return pipeline; one end of the throttle valve is connected to the oil inlet pipeline, and the other end is connected to the oil return pipeline.

[0039] In this technical solution, one end of the overflow valve is connected to the oil inlet pipeline, and the other end is connected to the oil return pipeline. One end of the throttle valve is connected to the oil inlet pipeline, and the other end is connected to the oil return pipeline, thereby realizing the control of the loading force of the first cylinder and the second cylinder, so that the test component can simulate the actual working state of the turntable more accurately, thereby improving the accuracy of the turntable life test.

[0040] Specifically, the relief valve is an electrically controlled relief valve.

[0041] The throttle valve is an electric proportional throttle valve.

[0042] In a technical solution of the present invention, the oil supply assembly also includes a loading actuator, which is arranged on at least one first oil cylinder and / or at least two second oil cylinders; the test assembly also includes a control assembly, which is electrically connected to the loading actuator.

[0043] In this technical solution, the loading actuator can detect the oil pressure in the first cylinder and the second cylinder, so that the control component can obtain the working status of the first cylinder and the second cylinder, and control the first cylinder and the second cylinder according to the working status of the first cylinder and the second cylinder.

[0044] The loading actuator includes a balancing valve and a pressure sensor. The balancing valve can balance the oil pressure in the pipeline, so that the pressure sensor can more accurately detect the pressure in the first cylinder and the second cylinder, thereby enabling the control component to more accurately control the operation of the overflow valve and the throttle valve.

[0045] Specifically, the control component is a PLC (Programmable Logic Controller) which is provided with a PLC program. The PLC program realizes the linkage control of the overflow valve and the throttle valve, and then controls the oil pressure of the first cylinder and the second cylinder. The two first cylinders output the same-phase load F1 and the lifting thrust of the frequency f1 to the lifting pin ears of the turntable; at the same time, the two second cylinders output the opposite-phase rotation thrust and pulling force to the rotating pin ears of the turntable, with the load F2 and the frequency f2 respectively.

[0046] PLC can be replaced by hydraulic servo controller and host computer system.

[0047] The data acquisition system can collect and convert the pressure of the two chambers of each oil cylinder through industrial data acquisition cards and industrial computer software to obtain real-time loading load feedback values, and record the curve and loading times. The original load data processing method is: F = P1 × S1-P2 × S2, where P1 and P2 are the pressure of the rodless cavity and the pressure of the rod cavity, and S1 and S2 are the area of ​​the rodless cavity and the area of ​​the rod cavity, respectively.

[0048] The data acquisition system can also be replaced by other software and hardware systems.

[0049] In one technical solution of the present invention, the test assembly also includes a platform, a third bolt and a nut; the first support assembly and the second support assembly are arranged on the platform; a plurality of mounting grooves are arranged in parallel on the platform; a plurality of third bolts are embedded in one of the plurality of mounting grooves and are inserted into the first support assembly, the second support assembly or the base; and the nut is tightened on the third bolt.

[0050] In this technical solution, the platform can fix the first support assembly, the second support assembly and the base, thereby making the turntable life test more accurate. A plurality of third bolts are embedded in one of the plurality of mounting grooves and inserted into the first support assembly, the second support assembly or the base; nuts are tightened on the third bolts to improve the stability of the first support assembly, the second support assembly and the base.

[0051] The test assembly provided by the present invention performs a series of accelerated processing such as statistical analysis, load concentration, equivalent damage, and stress benchmarking based on the measured load spectrum of the physical prototype to compile an accelerated test load spectrum that is up to 96 times that of the extreme working condition, thereby realizing four-channel collaborative turntable accelerated fatigue test loading.

[0052] The four-channel collaborative loading turntable optimizes the fatigue test bench structure. High fatigue damage can be retained by 95.8% relative to the actual working conditions of engineering machinery, thereby simulating the actual working conditions of engineering equipment, solving complex loading problems, low cost, no physical prototype is required as the test object, and fatigue testing of test samples can be carried out separately.

[0053] The four-channel high-load (1300kN) hydraulic cylinder combined with load spectrum processing technology can realize the high acceleration ratio (96 times) limit load fatigue endurance test of the turntable. The fatigue performance verification time is greatly compressed, the development cycle is saved, and after-sales failures can be quickly reproduced.

[0054] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0056] Figure 1 A schematic diagram of the structure of a test component according to an embodiment of the present invention is shown;

[0057] Figure 2 shows a front view of a test assembly according to one embodiment of the present invention;

[0058] Figure 3 shows a top view of a test assembly according to one embodiment of the present invention;

[0059] Figure 4 for Figure 2 A cross-sectional view of a test assembly along AA according to an embodiment of the present invention is shown;

[0060] Figure 5 for Figure 2 A cross-sectional view of a test assembly along line BB according to an embodiment of the present invention is shown;

[0061] Figure 6 for Figure 2 A cross-sectional view of a test assembly along CC according to an embodiment of the present invention is shown;

[0062] Figure 7 A structural schematic diagram of an oil supply assembly according to an embodiment of the present invention is shown.

[0063] in, Figures 1 to 7 The corresponding relationship between the reference numerals and component names in the figure is:

[0064] 100 turntable, 102 rotating body, 104 pin ear, 200 first support assembly, 202 first mounting hole, 300 second support assembly, 302 support component, 304 fourth mounting hole, 400 load assembly, 402 connecting component, 404 load component, 406 first oil cylinder, 408 first articulated shaft, 410 first retaining ring, 412 second mounting hole, 500 drive assembly, 502 second oil cylinder, 504 articulated seat, 506 second articulated shaft, 508 second retaining ring, 510 third mounting hole, 600 platform, 602 mounting groove, 700 oil tank, 800 oil supply assembly, 802 oil inlet pipeline, 804 oil pump, 806 first reversing valve, 808 oil return pipeline, 810 second reversing valve, 812 overflow valve, 814 throttle valve, 900 base. DETAILED DESCRIPTION

[0065] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0066] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0067] Refer to the following Figures 1 to 7 A test assembly according to some embodiments of the invention is described.

[0068] Embodiment 1:

[0069] like Figure 1 and Figure 2 As shown, the present invention provides a test assembly, which is used to test a turntable 100 of an engineering machinery. The test assembly includes a first support assembly 200, a second support assembly 300, a load assembly 400, a drive assembly 500 and a base 900; the base 900 is arranged between the first support assembly 200 and the second support assembly 300, and is used to support the turntable 100; the load assembly 400 is connected to the first support assembly 200, and is used to apply a load to the turntable 100; the drive assembly 500 is connected to the second support assembly 300, and is used to drive the turntable 100 to rotate.

[0070] The test assembly provided by the present invention can simulate the load generated by the cutting head through the load assembly 400 when the turntable 100 needs to be tested, and the load is applied to the turntable 100, and the turntable 100 is driven to rotate through the drive assembly 500 to simulate the working state of the turntable 100, thereby realizing the life test of the single turntable 100.

[0071] Since the test component can test the turntable 100 of the engineering machinery alone when testing the service life of the turntable 100 of the engineering machinery without the need for the entire engineering machinery to participate in the test, the difficulty of testing the life of the turntable 100 is reduced, making the life test of the turntable 100 more convenient.

[0072] Furthermore, the load generated by the cutting head is simulated by the load assembly 400, and the turntable 100 is driven to work by the driving assembly 500, so that the structure of the test assembly is relatively simple and the cost of the test assembly is reduced.

[0073] like Figure 3 and Figure 4 As shown, specifically, the turntable 100 includes a rotating body 102 and a pin ear 104. When testing the turntable 100, the load assembly 400 is connected to the pin ear 104 to apply a load to the turntable 100, and the drive assembly 500 is connected to the pin ear 104 to drive the rotating body 102 to rotate.

[0074] The construction machine is a construction machine such as an excavator or a boring machine that has a rotating platform 100 .

[0075] Embodiment 2:

[0076] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0077] like Figure 2 and Figure 5 As shown, the load assembly 400 includes a connecting component 402, a load component 404 and at least one first cylinder 406; the connecting component 402 is connected to the first support assembly 200; one end of the load component 404 is hinged to the connecting component 402, and the other end is used to be hinged to the cutting part connecting structure of the turntable 100; one end of the at least one first cylinder 406 is hinged to the connecting component 402, and the other end is used to be hinged to the lifting cylinder connecting structure of the turntable 100.

[0078] In this embodiment, when the turntable 100 is tested, the connecting component 402 is fixed on the first supporting assembly 200, and the two ends of the load component 404 are respectively hinged to the connecting component 402 and the turntable 100, and the two ends of the first oil cylinder 406 are also respectively hinged to the connecting component 402 and the turntable 100. When the first oil cylinder 406 outputs a certain thrust, the thrust will react on the turntable 100 under the action of the first supporting assembly 200 and the connecting component 402, thereby realizing the application of load to the turntable 100.

[0079] By adjusting the first oil cylinder 406 and the connecting component 402 up and down, combined with the rotation frequency adjustment, it is possible to simulate different working postures in a large angle range for loading. It effectively simulates the cutting working posture of the tunnel boring machine and accurately reproduces the stress state of the test sample. The load component 404 can simulate different working postures from 0 to 58 degrees for loading.

[0080] The first cylinder 406 may be replaced by a servo-hydraulic actuator of the same load rating.

[0081] The load assembly 400 further includes a first hinge shaft 408 and two first retaining rings 410 . The first hinge shaft 408 is inserted into the first oil cylinder 406 and the connecting component 402 . The two first retaining rings 410 are respectively sleeved on both ends of the first hinge shaft 408 .

[0082] Embodiment three:

[0083] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0084] The first support component 200 is provided with a plurality of first mounting holes 202, and the plurality of first mounting holes 202 are arranged in an array along the height direction of the first support component 200; a plurality of second mounting holes 412 are provided on the connecting component; the first support component 200 and the connecting component 402 are fixedly connected by first bolts penetrating through the plurality of second mounting holes 412 and some of the first mounting holes 202 among the plurality of first mounting holes 202.

[0085] In this embodiment, the second mounting hole 412 can cooperate with different first mounting holes 202, so that the connecting component can change its position in the vertical direction relative to the first support assembly 200, so that the load component can adjust the height according to test needs, making the test assembly more applicable.

[0086] Embodiment 4:

[0087] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0088] like Figure 2 and Figure 6 As shown, the driving assembly 500 includes at least two second oil cylinders 502 , one end of the at least two second oil cylinders 502 is connected to the second supporting assembly 300 , and the other end is used for being hinged to the rotary oil cylinder connection structure of the turntable 100 .

[0089] In this embodiment, when the turntable 100 is tested, at least two second cylinders 502 are respectively hinged to the turntable 100, and at least two second cylinders 502 apply thrusts or pulls in different directions to the turntable 100, thereby driving the turntable 100 to rotate reciprocatingly, so as to simulate the actual working state of the turntable 100, thereby realizing the test of the life of the turntable 100.

[0090] Specifically, the number of the second oil cylinders 502 is two.

[0091] The second cylinder 502 may be replaced by a servo-hydraulic actuator of the same load rating.

[0092] Embodiment five:

[0093] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0094] The test assembly also includes an articulated seat and multiple second bolts; one end of at least two second cylinders 502 is connected to the second support assembly 300 through the articulated seat, and a plurality of third mounting holes 510 are provided on the articulated seat; a plurality of fourth mounting holes 304 are provided on the second support assembly 300, and the plurality of fourth mounting holes 304 are arranged in an array along the height direction of the second support assembly 300; the articulated seat 504 and the second support assembly 300 are fixedly connected by second bolts that pass through the plurality of third mounting holes 510 and some of the fourth mounting holes 304 among the plurality of fourth mounting holes 304.

[0095] In this embodiment, the third mounting hole 510 can be matched with a different fourth mounting hole 304, so that the hinge seat can change its position in the vertical direction relative to the second support assembly 300, and the height of the second cylinder can be adjusted according to the height of the turntable, so that the test assembly has a wider range of applications.

[0096] Embodiment six:

[0097] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0098] like Figure 2 and Figure 6 As shown, the second support assembly 300 includes at least two support components 302 , and the at least two support components 302 are arranged in parallel and are respectively connected to at least two second oil cylinders 502 .

[0099] In this embodiment, the second support assembly 300 includes at least two support components 302 . The at least two support components 302 are arranged in parallel and respectively support the second oil cylinder 502 , thereby improving the stability of the support for the second oil cylinder 502 .

[0100] The driving assembly 500 also includes two articulated seats 504, two second articulated shafts 506 and four second retaining rings 508. The two articulated seats 504 are respectively connected to the two supporting components 302. Each second articulated shaft 506 is passed through a supporting component 302 and a second oil cylinder 502. The two second retaining rings 508 are respectively mounted on both sides of the second articulated shaft 506.

[0101] The second supporting assembly 300 may also be an integral supporting assembly.

[0102] Embodiment seven:

[0103] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0104] like Figure 7As shown, the test assembly further includes an oil supply assembly 800 , which is respectively connected to at least one first oil cylinder 406 and at least two second oil cylinders 502 to drive at least one first oil cylinder 406 and at least two second oil cylinders 502 .

[0105] In this embodiment, the oil supply assembly 800 delivers hydraulic oil to the first cylinder 406 and the second cylinder 502, thereby achieving control over the first cylinder 406 and the second cylinder 502, so as to control the magnitude of the force output by the first cylinder 406 and the second cylinder 502 according to test requirements.

[0106] Embodiment eight:

[0107] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0108] like Figure 7 As shown, the test component also includes an oil tank 700, and the oil supply component 800 includes an oil inlet pipeline 802, an oil pump 804, a first reversing valve 806 and an oil return pipeline 808; the oil inlet pipeline 802 is connected to the oil tank 700; the oil pump 804 is arranged on the oil inlet pipeline 802; the first end of the first reversing valve 806 is connected to the oil inlet pipeline 802, the second end of the first reversing valve 806 is connected to the rodless chamber of at least one first oil cylinder 406, and the third end of the first reversing valve 806 is connected to the rod chamber of at least one first oil cylinder 406; the oil return pipeline 808 is connected to the fourth end of the first reversing valve 806 and is connected to the oil tank 700.

[0109] In this embodiment, the oil pump 804 is disposed on the oil inlet pipeline 802, and the hydraulic oil in the tank is delivered to the first oil cylinder 406 and the second oil cylinder 502. The first reversing valve 806 can control the oil inlet and outlet directions of the first oil cylinder 406, and further control the piston of the first oil cylinder 406 to extend or retract, so as to realize the control of the first oil cylinder 406.

[0110] Specifically, when the turntable 100 is tested, oil enters the rodless chamber of the first oil cylinder 406 , and the piston of the first oil cylinder 406 extends, thereby applying a load to the turntable 100 .

[0111] When a load needs to be applied to the turntable, the first end of the first reversing valve 806 is connected to the second end of the first reversing valve 806, and the third end of the first reversing valve 806 is connected to the fourth end of the first reversing valve 806, thereby applying a thrust to the first support assembly 200, and the first support assembly 200 reacts the thrust to the load component 404, and then transmits it to the turntable 100.

[0112] Embodiment nine:

[0113] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0114] like Figure 7 As shown, the oil supply assembly 800 also includes a second reversing valve 810, a first end of the second reversing valve 810 is connected to the oil inlet pipeline 802, a second end of the second reversing valve 810 is connected to the rodless chamber of at least one of the second oil cylinders 502, and is connected to the rod chamber of the other second oil cylinder 502 among the at least two second oil cylinders 502, a third end of the second reversing valve 810 is connected to the rod chamber of at least one of the second oil cylinders 502, and is connected to the rodless chamber of the other second oil cylinder 502 among the at least two second oil cylinders 502, and a fourth end of the second reversing valve 810 is connected to the return oil pipeline 808.

[0115] In this embodiment, the second reversing valve 810 can control the oil inlet and outlet directions of the second oil cylinder 502 , and further control the extension or retraction of the piston of the second oil cylinder 502 to achieve control over the second oil cylinder 502 .

[0116] Specifically, the number of second oil cylinders 502 is two, the second end of the second reversing valve 810 is connected to the rodless chamber of one of the two second oil cylinders 502, and is connected to the rod chamber of the other of the two second oil cylinders 502, the third end of the second reversing valve 810 is connected to the rod chamber of one of the two second oil cylinders 502, and is connected to the rodless chamber of the other of the two second oil cylinders 502, so that the movement directions of the pistons of the two second oil cylinders 502 are opposite, and the two second oil cylinders 502 can drive the turntable 100 to rotate.

[0117] When the turntable is driven to rotate, the first end of the second reversing valve 810 is connected to the second end of the second reversing valve 810, the third end of the second reversing valve 810 is connected to the fourth end of the second reversing valve 810, the piston of one of the two second oil cylinders 502 extends, and the piston of the other second oil cylinder 502 retracts, driving the turntable 100 to rotate clockwise. After reversing, the first end of the second reversing valve 810 is connected to the third end of the second reversing valve 810, the second end of the second reversing valve 810 is connected to the fourth end of the second reversing valve 810, the piston of one of the two second oil cylinders 502 retracts, and the piston of the other second oil cylinder 502 extends, driving the turntable 100 to rotate counterclockwise.

[0118] Specifically, the first reversing valve 806 and the second reversing valve 810 are electrically controlled proportional reversing valves.

[0119] Embodiment ten:

[0120] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0121] like Figure 7 As shown, the oil supply assembly 800 also includes a relief valve 812 and a throttle valve 814; one end of the relief valve 812 is connected to the oil inlet pipeline 802, and the other end is connected to the oil return pipeline 808; one end of the throttle valve 814 is connected to the oil inlet pipeline 802, and the other end is connected to the oil return pipeline 808.

[0122] In this embodiment, one end of the overflow valve 812 is connected to the oil inlet pipeline 802, and the other end is connected to the oil return pipeline 808. One end of the throttle valve 814 is connected to the oil inlet pipeline 802, and the other end is connected to the oil return pipeline 808, thereby realizing the control of the loading force of the first cylinder 406 and the second cylinder 502, so that the test component can simulate the actual working state of the turntable 100 more accurately, thereby improving the accuracy of the life test of the turntable 100.

[0123] Specifically, the relief valve 812 is an electrically controlled relief valve 812 .

[0124] The throttle valve 814 is an electric proportional throttle valve 814 .

[0125] Embodiment eleven:

[0126] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0127] like Figure 7 As shown, the oil supply assembly 800 further includes a loading actuator, which is disposed on at least one first oil cylinder 406 and / or at least two second oil cylinders 502; the test assembly further includes a control assembly, which is electrically connected to the loading actuator.

[0128] In this embodiment, the loading actuator can detect the oil pressure in the first cylinder 406 and the second cylinder 502, so that the control component can obtain the working status of the first cylinder 406 and the second cylinder 502, and control the first cylinder 406 and the second cylinder 502 according to the working status of the first cylinder 406 and the second cylinder 502.

[0129] The loading actuator includes a balancing valve and a pressure sensor. The balancing valve can balance the oil pressure in the pipeline, so that the pressure sensor can more accurately detect the pressure in the first cylinder 406 and the second cylinder 502, thereby allowing the control component to more accurately control the operation of the overflow valve 812 and the throttle valve 814.

[0130] Specifically, the control component is a PLC, which is provided with a PLC program. The PLC program realizes the linkage control of the overflow valve 812 and the throttle valve 814, and then controls the oil pressure of the first cylinder 406 and the second cylinder 502. The two first cylinders 406 output the same-phase load F1 and the lifting thrust of the frequency f1 to the lifting pin ears 104 of the turntable 100; at the same time, the two second cylinders 502 respectively output the anti-phase rotation thrust and pulling force to the rotation pin ears 104 of the turntable 100, with a load of F2 and a frequency of f2.

[0131] PLC can be replaced by hydraulic servo controller and host computer system.

[0132] The data acquisition system can collect and convert the pressure of the two chambers of each oil cylinder through industrial data acquisition cards and industrial computer software to obtain real-time loading load feedback values, and record the curve and loading times. The original load data processing method is: F = P1 × S1-P2 × S2, where P1 and P2 are the pressure of the rodless cavity and the pressure of the rod cavity, and S1 and S2 are the area of ​​the rodless cavity and the area of ​​the rod cavity, respectively.

[0133] The data acquisition system can also be replaced by other software and hardware systems.

[0134] Embodiment 12:

[0135] This embodiment provides a test component. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0136] like Figure 1 and Figure 2 As shown, the test assembly further includes a platform 600, a third bolt and a nut; the first support assembly 200 and the second support assembly 300 are arranged on the platform 600; the base 900 is arranged on the platform 600 for supporting the turntable 100. A plurality of mounting grooves 602 are arranged in parallel on the platform 600; a plurality of third bolts are embedded in one of the plurality of mounting grooves 602, and inserted into the first support assembly 200, the second support assembly 300 or the base 900; and the nut is tightened on the third bolt.

[0137] In this embodiment, the platform 600 can fix the first support assembly 200, the second support assembly 300 and the base 900, thereby making the life test of the turntable 100 more accurate. A plurality of third bolts are embedded in one of the plurality of mounting grooves 602 and inserted into the first support assembly 200, the second support assembly 300 or the base 900; nuts are tightened on the third bolts to improve the stability of the first support assembly 200, the second support assembly 300 and the base 900.

[0138] The test assembly provided by the present invention performs a series of accelerated processing such as statistical analysis, load concentration, equivalent damage, and stress benchmarking based on the measured load spectrum of the physical prototype to compile an accelerated test load spectrum that is up to 96 times that of the limit working condition, thereby realizing 100 acceleration fatigue test loading on a four-channel collaborative turntable.

[0139] The four-channel collaborative loading turntable 100 optimizes the fatigue test bench structure. High fatigue damage can be retained by 95.8% relative to the actual working conditions of engineering machinery, thereby simulating the actual working conditions of engineering equipment, solving complex loading problems, low cost, no physical prototype is required as the test object, and fatigue testing of test samples can be carried out separately.

[0140] The four-channel high-load hydraulic cylinder combined with load spectrum processing technology can realize the 100-degree high acceleration ratio limit load fatigue endurance test of the turntable. It greatly shortens the fatigue performance verification time, saves the development cycle, and quickly reproduces after-sales failures.

[0141] In the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0142] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0143] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test component, characterized in that: The test assembly is used to test the turntable of the engineering machinery, and the test assembly includes: a first support assembly; a second support assembly; A base, disposed between the first supporting assembly and the second supporting assembly, for supporting the turntable; a load assembly, the load assembly being connected to the first support assembly and being used to apply a load to the turntable; A driving assembly, the driving assembly is connected to the second supporting assembly and is used to drive the turntable to rotate; The load assembly includes a connecting component, a load component and at least one first cylinder; The connecting component is connected to the first supporting assembly; One end of the load component is hinged to the connecting component, and the other end is used to be hinged to the cutting part connecting structure of the turntable; One end of the at least one first oil cylinder is hinged to the connecting component, and the other end is used to be hinged to the lifting oil cylinder connecting structure of the turntable; The first support assembly is provided with a plurality of first mounting holes, and the plurality of first mounting holes are arranged in an array along a height direction of the first support assembly; The connecting component is provided with a plurality of second mounting holes; The first supporting assembly and the connecting component are fixedly connected by first bolts penetrating through the plurality of second mounting holes and some of the first mounting holes among the plurality of first mounting holes; The driving assembly includes at least two second oil cylinders, one end of the at least two second oil cylinders is connected to the second supporting assembly, and the other end is used for being hinged to the rotary oil cylinder connecting structure of the rotary table; An oil supply assembly, wherein the oil supply assembly is respectively connected to the at least one first oil cylinder and the at least two second oil cylinders to drive the at least one first oil cylinder and the at least two second oil cylinders; tank; The oil supply assembly includes an oil inlet pipeline, an oil pump, a first reversing valve, an oil return pipeline and a loading actuator; The oil inlet pipeline is connected to the oil tank; The oil pump is arranged on the oil inlet pipeline; The first end of the first reversing valve is connected to the oil inlet pipeline, the second end of the first reversing valve is connected to the rodless chamber of the at least one first oil cylinder, and the third end of the first reversing valve is connected to the rod chamber of the at least one first oil cylinder; The oil return pipeline is connected to the fourth end of the first reversing valve and is connected to the oil tank; The loading actuator is arranged on the at least one first oil cylinder and / or the at least two second oil cylinders; The test assembly further includes a control assembly electrically connected to the loading actuator.

2. The test assembly according to claim 1, characterized in that Also includes: An articulated seat, one end of the at least two second oil cylinders is connected to the second support assembly through the articulated seat, and a plurality of third mounting holes are provided on the articulated seat; The second support assembly is provided with a plurality of fourth mounting holes, and the plurality of fourth mounting holes are arranged in an array along a height direction of the second support assembly; The hinge seat and the second supporting assembly are fixedly connected by second bolts penetrating through the plurality of third mounting holes and part of the fourth mounting holes among the plurality of fourth mounting holes.

3. The test assembly according to claim 1, characterized in that The second supporting assembly comprises: At least two supporting components are arranged in parallel and are connected to the at least two second oil cylinders in a one-to-one correspondence.

4. The test assembly according to claim 1, characterized in that The oil supply assembly also includes: A second reversing valve, the first end of the second reversing valve is connected to the oil inlet pipeline, the second end of the second reversing valve is connected to the rodless chamber of one of the at least two second oil cylinders, and is connected to the rod chamber of the other second oil cylinder among the at least two second oil cylinders, the third end of the second reversing valve is connected to the rod chamber of one of the at least two second oil cylinders, and is connected to the rodless chamber of the other second oil cylinder among the at least two second oil cylinders, and the fourth end of the second reversing valve is connected to the oil return pipeline.

5. The test assembly according to any one of claims 1 to 4, characterized in that Also includes: A platform, the first supporting assembly and the second supporting assembly are arranged on the platform; the base is arranged on the platform, and a plurality of mounting slots are arranged in parallel on the platform; third bolts, wherein the plurality of third bolts are embedded in one of the plurality of mounting grooves and inserted into the first supporting assembly, the second supporting assembly or the base; A nut is screwed onto the third bolt.

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