Bogie loading test system and loading test method

Abstract

The present invention provides a bogie loading test system and a loading test method. The bogie loading test system includes a test platform and an adjustable frame installed on the test platform. The adjustable frame is composed of a column, a crossbeam, a first longitudinal beam and a second longitudinal beam. The heights between adjacent columns, between adjacent crossbeams, and the installation height of the crossbeam on the column, the installation position of the first longitudinal beam on the crossbeam, and the installation height of the second longitudinal beam on the column can all be adjusted. Multiple actuators are independently connected to a servo control system. Multiple actuators are installed on at least one of the column, the crossbeam, the first longitudinal beam, and the second longitudinal beam. The actuators are controlled by the servo control system to load the test part of the bogie. In this way, the frame size and the installation position of the actuator can be adjusted according to the required bogie type to adapt to different types of bogies for testing, which solves the disadvantage that the previous bogie test loading system can only test one type of bogie.

Description

Technical Field

[0001] The invention relates to the technical field of bogie loading test, and in particular to a bogie loading test system and a loading test method. Background Art

[0002] The bogie is the core component of the rail vehicle, and the quality of the bogie is directly related to the operating safety of the rail vehicle.

[0003] In order to verify the fatigue strength of the bogie, it is necessary to carry out a loading test on the bogie before the bogie is installed on the actual vehicle. However, the existing loading test benches are customized for specific bogie types. After the loading test bench is installed, it is fixed and can only carry out a loading test on one type of bogie. The rail vehicle factory will choose which bogie to produce according to the model of the order. When a certain bogie is not needed for a long time, its loading test bench will remain idle, resulting in a great waste of resources. Summary of the invention

[0004] The present invention provides a bogie loading test system to solve the problem that the previous bogie test loading system can only test one type of bogie, and can adapt to various types of bogies.

[0005] An embodiment of the present invention provides a bogie loading test system, comprising:

[0006] A test platform, suitable for placing the bogie, wherein the surface of the test platform is provided with first mounting holes arranged in a matrix;

[0007] A column, wherein the outer surface and both end surfaces of the column are provided with second mounting holes arranged in a matrix, and the column is fixedly connected to the test platform through the second mounting holes and the first mounting holes provided at the bottom end of the column through a first connecting member;

[0008] A crossbeam, wherein at least the upper and lower surfaces and the two end surfaces of the crossbeam are provided with third mounting holes arranged in a matrix, and along the lateral direction of the test platform, the two ends of the crossbeam are connected between the adjacent columns, and the crossbeam is fixedly connected to the columns through the second mounting holes provided on the outer peripheral surfaces of the columns through the second connecting member and the third mounting holes at the two ends of the crossbeam;

[0009] A first longitudinal beam, the outer surface of which is provided with fourth mounting holes arranged in a matrix, the first longitudinal beam being laid on the upper surface of the adjacent cross beam along the longitudinal direction of the test platform, and the first longitudinal beam being fixedly connected to the cross beam through the third mounting holes and the fourth mounting holes provided on the upper and lower surfaces of the cross beam via a third connecting member;

[0010] A second longitudinal beam, the outer surface of which is distributed with fifth mounting holes arranged in a matrix, the second longitudinal beam is fixed to the outer side surface of the adjacent column along the longitudinal direction of the test platform, and the second longitudinal beam is fixedly connected to the column through the second mounting holes and the fifth mounting holes provided on the outer surface of the column by a fourth connecting member;

[0011] Multiple actuators are independently connected to a servo control system. The multiple actuators are installed on at least one of the column, the crossbeam, the first longitudinal beam and the second longitudinal beam. The actuators are controlled by the servo control system to load the test part of the bogie.

[0012] According to an embodiment of the present invention, first flanges are provided at both ends of the column, the second mounting holes are distributed on the first flanges, and the column is fixedly connected to the test platform through the first flanges;

[0013] It also includes a mounting plate, a countersunk hole is provided on the surface of the mounting plate, the mounting plate is connected to the test platform via a fastener, and the column is connected to the mounting plate via the first connecting piece.

[0014] According to an embodiment of the present invention, second flanges are provided at both ends of the crossbeam, the third mounting holes are distributed on the second flanges, and both ends of the crossbeam are fixedly connected to the columns through the second flanges.

[0015] According to one embodiment of the present invention, the number of the columns is four, the number of the cross beams is two, the number of the first longitudinal beams is two, the number of the second longitudinal beams is two, the four columns are fixed vertically on the test platform in pairs, the two cross beams are fixed horizontally and parallelly between the two pairs of columns, the two first longitudinal beams are fixed horizontally and parallelly to the top surfaces of the two cross beams, and the two second longitudinal beams are fixed horizontally and parallelly to the outer side surfaces of the two pairs of columns.

[0016] According to one embodiment of the present invention, the columns, the cross beams, the first longitudinal beams and the second longitudinal beams are all square steel tubes of consistent specifications, the surfaces of the square steel tubes are evenly distributed with mounting holes, the distribution density of the mounting holes and the sizes of the mounting holes are consistent, and the mounting holes on the opposite sides of each square steel tube are arranged one by one.

[0017] According to one embodiment of the present invention, the test platform comprises a bottom plate, a top plate arranged opposite to the bottom plate, and a side plate arranged between the bottom plate and the top plate, the bottom plate and the top plate are connected by fasteners, and the side plate is also connected to the top plate and the bottom plate by fasteners;

[0018] I-beams are also provided at both ends of the test platform in the length direction. The I-beams are located between the top plate and the bottom plate. The I-beams are connected to the top plate and the bottom plate via fasteners.

[0019] According to an embodiment of the present invention, the top plate is assembled from a plurality of sub-top plates, and a plurality of supporting pads are provided at intervals at the bottom of the bottom plate.

[0020] According to one embodiment of the present invention, the actuator includes an actuator body and joint hinges connected to both axial ends of the actuator body, the actuator body has a built-in displacement sensor, and a load sensor is provided between the actuator body and one of the joint hinges.

[0021] According to an embodiment of the present invention, each of the actuators is connected to the main oil circuit via an independent servo valve and a distributor.

[0022] According to one embodiment of the present invention, the joint hinges at both ends of the actuator are connected to the transition plate through fasteners, and connecting holes are provided on the joint hinges and the transition plate. One end of the actuator is fixed to the square steel pipe through the transition plate, and the other end of the actuator loads the bogie through the transition plate.

[0023] The embodiment of the present invention also provides a loading test method of a bogie loading test system, comprising the following steps:

[0024] According to the characteristic parameters of the bogie to be tested and the number, position and load size of the loading points required by the test, first select the matching actuator, then determine the layout of the frame and the installation of the actuator, and obtain the test plan of the bogie to be tested;

[0025] According to the test plan, a frame is mounted on the test platform, and each actuator is installed on the frame;

[0026] Determine a target load spectrum, and import the target load spectrum into a servo control system after preprocessing;

[0027] The following data processing is performed in the servo control system: according to the target load spectrum required by the test, the control signal of the actuator corresponding to each loading point is decomposed to obtain the control signal of a single actuator; the interference of a single actuator on other loading points when loading its corresponding loading point is calculated respectively, and the control signal of the actuator corresponding to other loading points is compensated according to the corresponding interference value; when loading with multiple degrees of freedom, the control signal of each actuator is continuously iterated and compensated according to the coupling relationship of each loading position until the test accuracy requirements are met;

[0028] The servo control system outputs a control signal to control the actuator to load the test part of the bogie.

[0029] The bogie loading test system provided by the present invention can adjust the size of the frame composed of columns, crossbeams and longitudinal beams. The installation heights between adjacent columns, between adjacent crossbeams, and the crossbeams on the columns, the installation position of the first longitudinal beam on the crossbeam, and the installation height of the second longitudinal beam on the column can all be adjusted. Therefore, the frame size and shape can be adjusted according to the required bogie type, as well as the installation position of the actuator can be adjusted to adapt to different types of bogies for testing, which solves the drawbacks of the previous bogie test loading system that can only test one type of bogie, and the waste of resources caused by multiple types of bogies requiring multiple bogie test loading systems. It can realize a loading test system that is suitable for loading tests of multiple types of bogies, achieve full and reasonable utilization of resources, save costs, and also save the problem of needing to build multiple bogie test systems in multiple laboratories to occupy too much space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of a bogie loading test system provided by the present invention at one angle;

[0032] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure from another angle;

[0033] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure from another angle;

[0034] Figure 4 yes Figure 1 A side view structural schematic diagram of;

[0035] Figure 5 yes Figure 1 Schematic diagram of the main structure;

[0036] Figure 6 It is a structural schematic diagram of an actuator in a bogie loading test system provided by the present invention;

[0037] Figure 7 1 is a connection diagram between each actuator and the main oil circuit in an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, test platform; 110, top plate; 120, bottom plate; 130, side plate; 140, I-beam; 150, support pad; 200, column; 210, first flange; 300, crossbeam; 310, second flange; 400, first longitudinal beam; 500, second longitudinal beam; 600, actuator; 610, actuator body; 620, joint hinge; 630, load sensor; 640, transition pad; 700, mounting pad; 800, stud; 900, bogie. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Combine the following Figures 1 to 6 The bogie loading test system of the present invention is described.

[0042] On the one hand, an embodiment of the present invention provides a bogie loading test system, including a test platform 100 and a column 200, a crossbeam 300, a longitudinal beam and an actuator 600 installed on the test platform 100, the column 200, the crossbeam 300 and the longitudinal beam are constructed to form a frame, the actuator 600 is installed on the frame, and the test platform 100 is used to place the bogie 900 to be tested.

[0043] Specifically, the test platform 100 of this embodiment is suitable for placing the bogie 900, and the surface of the test platform 100 is distributed with first mounting holes arranged in a matrix. Specifically, the entire surface of the test platform 100 is covered with first mounting holes, and the first mounting holes are arranged in a certain order. The spacing between adjacent first mounting holes is equal along the longitudinal and transverse directions of the test platform 100. It should be noted that the surface of the test platform 100 is also provided with countersunk holes, which facilitate fastening and connecting the top plate 110 and the bottom plate 120 of the test platform 100 by fasteners such as bolts, and by providing the countersunk holes, the heads of the bolts will not protrude from the surface of the test platform 100, but will be flush with the surface of the test platform 100.

[0044] The outer peripheral surface and both end surfaces of the column 200 of this embodiment are distributed with second mounting holes arranged in a matrix, all sides of the column 200 are distributed with second mounting holes, and both ends of the column 200 are also distributed with second mounting holes. The column 200 is fixedly connected to the test platform 100 through the second mounting hole and the first mounting hole at the bottom of the column 200 through the first connecting member. The column 200 is installed on the test platform 100. Since the first mounting holes are all over the test platform 100, the installation position of the column 200 on the test platform 100 can be freely adjusted as needed. For example, the spacing between adjacent columns 200 and the position of the column 200 on the test platform 100 can be adjusted.

[0045] It should be noted that the distribution density and size of the first mounting holes are consistent with the distribution density and size of the second mounting holes, so that the column 200 can be conveniently connected to the test platform 100, and the column 200 and the test platform 100 are connected together by sequentially passing through the first mounting hole of the test platform 100 and the second mounting hole at the bottom of the column 200, so as to fix the column 200 on the test platform 100. The first connecting member of this embodiment and the second connecting member, the third connecting member, the fourth connecting member and the fifth connecting member mentioned below are all studs 800. As the name implies, the studs 800 are provided with threads at both ends and are tightened by nuts. For the reliability of the connection, both ends of the studs 800 can be tightened by double nuts. The stud 800 passes through the test platform 100, and one end extending out of the bottom surface of the test platform 100 is screwed with a nut, and one end extending out of the upper surface of the test platform 100 passes through the second mounting hole at the bottom end of the column 200 and is screwed with a nut, thereby fixing the column 200 to the test platform 100.

[0046] The crossbeam 300 of this embodiment has third mounting holes arranged in a matrix on at least the upper and lower surfaces and the two end surfaces. That is, the crossbeam 300 may have only one pair of third mounting holes on the side surfaces. When the crossbeam 300 is installed, the pair of side surfaces serve as the upper and lower surfaces of the crossbeam 300. The two end surfaces of the crossbeam 300 also have third mounting holes. Along the lateral direction of the test platform 100, the two ends of the crossbeam 300 are connected between adjacent columns 200. That is, the crossbeam 300 is installed along the lateral direction of the test platform 100. The crossbeam 300 is connected to the adjacent columns 200. The second connecting member passes through the second mounting hole on the outer peripheral surface of the column 200 and the third mounting holes at both ends of the beam 300 and is fixedly connected to the column 200. It can be understood that the beam 300 is installed between two adjacent columns 200 and connected to the side of the column 200 through the second connecting member. Specifically, the stud 800 passes through the third mounting hole at the end of the beam 300 in sequence and extends out of the column 200 through the opposite side of the column 200. The nut is tightened from the back of the column 200 to achieve the connection between the beam 300 and the column 200. The height at which the beam 300 is installed on the column 200 can be freely adjusted as needed.

[0047] For ease of description, the longitudinal beam of this embodiment is divided into a first longitudinal beam 400 and a second longitudinal beam 500. The first longitudinal beam 400 and the second longitudinal beam 500 have completely the same structure and only differ in the installation positions, which will be described in detail below.

[0048] The outer peripheral surface of the first longitudinal beam 400 of this embodiment is distributed with fourth mounting holes arranged in a matrix. Along the longitudinal direction of the test platform 100, the first longitudinal beam 400 is laid on the upper surface of the adjacent cross beam 300, that is, the first longitudinal beam 400 is arranged and mounted on the cross beam 300 along the longitudinal direction of the test platform 100, and the first longitudinal beam 400 is fixedly connected to the cross beam 300 through the third mounting hole and the fourth mounting hole provided on the upper and lower surfaces of the cross beam 300 by the third connecting member. The stud 800 passes through the upper and lower surfaces of the first longitudinal beam 400 and the upper and lower surfaces of the cross beam 300 in sequence, and the nut is tightened from the upper surface of the first longitudinal beam 400 and the nut is tightened from the lower surface of the cross beam 300, so as to fix the first longitudinal beam 400 and the cross beam 300 together. In this embodiment, the spacing between the two first longitudinal beams 400 can be adjusted as needed.

[0049] The outer circumferential surface of the second longitudinal beam 500 of this embodiment is distributed with fifth mounting holes arranged in a matrix. Along the longitudinal direction of the test platform 100, the second longitudinal beam 500 is fixed to the outer side surface of the adjacent column 200, that is, the second longitudinal beam 500 is arranged and mounted on the column 200 along the longitudinal direction of the test platform 100, and the second longitudinal beam 500 is fixedly connected to the column 200 through the second mounting hole and the fifth mounting hole arranged on the outer circumferential surface of the column 200 through the fourth connecting member. The stud 800 passes through the opposite side of the second longitudinal beam 500 and the opposite side of the column 200 in sequence, and the nut is tightened from the outer side of the second longitudinal beam 500 and the nut is tightened from the inner side of the column 200, so as to fix the second longitudinal beam 500 to the column 200. The height at which the second longitudinal beam 500 is installed on the column 200 can be adjusted as needed.

[0050] The multiple actuators 600 of this embodiment are all independently connected to the servo control system, that is, each actuator 600 is connected to the servo control system as an independent channel, and the multiple actuators 600 do not affect each other. The multiple actuators 600 are installed on at least one of the column 200, the crossbeam 300, the first longitudinal beam 400 and the second longitudinal beam 500. Usually, the actuators 600 are installed on the crossbeam 300, the first longitudinal beam 400 and the second longitudinal beam 500. The actuators 600 are controlled by the servo control system to load the test part of the bogie 900. The test parts of the bogie 900 can be measured through actual vehicle testing. For example, during the actual vehicle test of the bogie 900, testing mechanisms such as sensors or strain gauges are installed at multiple parts of the bogie 900, and the positions of the bogie 900 that are prone to fatigue are determined according to the measured force as test parts, thereby providing a position reference for the test parts of the bogie 900 to be tested. By loading the selected test parts, the fatigue strength of the sensitive positions of the bogie 900 can be obtained, thereby judging whether the performance of the bogie 900 to be tested can meet the use requirements, thereby providing a reliable basis for the quality evaluation of the bogie 900.

[0051] In this embodiment, the bogie 900 can be a bogie 900 of a variable-gauge vehicle, an EMU, an intercity vehicle, a subway, and the like. Different types of bogies 900 have different specifications and different test locations. According to different types of bogies 900, this embodiment can adjust the size of the frame composed of the column 200, the crossbeam 300, and the longitudinal beam, the position of the column 200 on the test platform 100, the height between adjacent columns 200, between adjacent crossbeams 300, and the installation height of the crossbeam 300 on the column 200, the installation position of the first longitudinal beam 400 on the crossbeam 300, and the installation height of the second longitudinal beam 500 on the column 200. This can adjust the frame size, shape and installation position of the actuator 600 according to the required type of bogie 900 to adapt to different types of bogies 900 for testing, which solves the drawbacks of the previous bogie 900 test loading system that can only test one type of bogie 900, and the waste of resources caused by the need for multiple types of bogies 900 to have multiple bogie 900 test loading systems. It can realize a loading test system that is suitable for loading tests of multiple types of bogies 900, so as to make full and rational use of resources, save costs, and also save the problem of needing to build multiple bogie 900 test systems in multiple laboratories to occupy too much space.

[0052] For example, when testing a variable gauge bogie, a frame suitable for the variable gauge bogie is mounted and a corresponding actuator 600 is installed. After a batch of variable gauge bogies are tested, it is necessary to replace it with another type of bogie 900 for testing, for example, when an intercity vehicle bogie needs to be tested, the cross beam 300, the longitudinal beam and the column 200 are removed, and another set of frames is mounted according to the newly tested bogie 900, and the corresponding actuator 600 is installed for testing. Therefore, only the time cost of removing and installing the frame and the actuator 600 is required, and the test cost can be greatly saved.

[0053] In order to facilitate the connection between the column 200 and the test platform 100, according to one embodiment of the present invention, a first flange 210 is provided at both ends of the column 200, and the first flange 210 is provided with a second mounting hole. The column 200 is fixedly connected to the test platform 100 through the first flange 210, and the stud 800 is passed through the second mounting hole of the first flange 210 and the first mounting hole of the test platform 100 until it extends from the bottom surface of the test platform 100. The extended end is tightened with a nut, and the end of the stud 800 located outside the first flange 210 is tightened with a nut, thereby fixing the column 200 to the test platform 100.

[0054] Specifically, the column 200 is a square steel tube having four sides, wherein a pair of opposite sides are extended outwardly around to form flanges, that is, a pair of sides are surrounded by a circle of flanges, and second mounting holes are arranged at intervals along the extension direction of the flanges. The flanges at both ends of the column 200 form the first flange 210, which is convenient for connection with the test platform 100.

[0055] In this embodiment, a mounting plate 700 is also included. The surface of the mounting plate 700 is provided with a countersunk hole. The mounting plate 700 is connected to the test platform 100 by fasteners such as bolts. By providing the countersunk hole, after the bolts are tightened, the surface of the mounting plate 700 is flat, which does not affect the connection between the column 200 and the mounting plate 700. Of course, the surface of the mounting plate 700 is also provided with a first mounting hole. The column 200 and the mounting plate 700 are connected by a first connecting member. The stud 800 passes through the second mounting hole of the first flange 210 and the first mounting hole of the mounting plate 700 and the first mounting hole of the test platform 100. Nuts are screwed on both ends of the stud 800 for tightening. By providing the mounting plate 700, the surface of the test platform 100 can be effectively protected.

[0056] According to an embodiment of the present invention, second flanges 310 are provided at both ends of the crossbeam 300 , and third mounting holes are distributed on the second flanges 310 . Both ends of the crossbeam 300 are fixedly connected to the column 200 through the second flanges 310 .

[0057] Similarly, the cross beam 300 is a square steel tube having four sides, wherein the four sides of a pair of opposite sides extend outward to form flanges, that is, the four sides of the pair of sides are surrounded by a circle of flanges, and third mounting holes are arranged at intervals along the extending direction of the flanges. In addition, the end faces of the other two sides of the square steel tube also form flanges, and the circle of flanges at both ends of the cross beam 300 form the second flange 310, which is convenient for connection with the column 200. The stud 800 passes through the third mounting hole of the second flange 310 and the second mounting hole on the column 200, and nuts are tightened at both ends of the stud 800, thereby connecting the cross beam 300 and the column 200 together.

[0058] According to one embodiment of the present invention, the number of columns 200 is four, the number of cross beams 300 is two, the number of first longitudinal beams 400 is two, and the number of second longitudinal beams 500 is two. The four columns 200 are fixed vertically on the test platform 100 in pairs relative to each other, the two cross beams 300 are fixed horizontally and parallelly between the two pairs of columns 200, the two first longitudinal beams 400 are fixed horizontally and parallelly to the top surfaces of the two cross beams 300, and the two second longitudinal beams 500 are fixed horizontally and parallelly to the outer side surfaces of the two pairs of columns 200, thereby forming a frame. The space covered by the frame is the space for installing the bogie 900. The size of the frame can be adjusted to adapt to bogies 900 of different specifications. Since the test parts of different bogies 900 are different, the installation position of the actuator 600 is also different. By setting adjustable cross beams 300, first longitudinal beams 400 and second longitudinal beams 500, the installation requirements of the actuator 600 can be met. The actuator 600 can be hung on the first longitudinal beam 400 to apply force to the bogie 900 from top to bottom, and the actuator 600 can also be installed on the side of the second longitudinal beam 500 to apply force from the side of the bogie 900. The actuator 600 can also be installed at other positions such as the cross beam 300 and the column 200.

[0059] In this embodiment, the columns 200, the cross beams 300, and the longitudinal beams are evenly provided with mounting holes, which can be assembled into frames of different structural sizes. Different combinations of actuators 600 are installed on the frames according to the size of the test piece and the test requirements, so that different test schemes can be customized.

[0060] According to one embodiment of the present invention, the column 200, the crossbeam 300, the first longitudinal beam 400 and the second longitudinal beam 500 are all square steel tubes of the same specifications, and the surface of the square steel tube is evenly distributed with mounting holes, and the distribution density and size of the mounting holes are consistent, and the mounting holes on the opposite sides of each square steel tube are arranged one by one. This can improve versatility and facilitate processing, manufacturing and installation. Since the actuator 600 is usually not installed on the side of the crossbeam 300, the opposite side of the crossbeam 300 may not be provided with mounting holes, and mounting holes are only provided on the upper and lower surfaces of the crossbeam 300. In other words, the mounting holes of the square steel tube of the crossbeam 300 can be provided only on the upper and lower surfaces. The column 200, the first longitudinal beam 400 and the second longitudinal beam 500 can adopt a completely consistent square steel tube structure and the same distribution method of mounting holes.

[0061] In a specific embodiment of the present invention, the test platform 100 includes a bottom plate 120, a top plate 110 arranged opposite to the bottom plate 120, and a side plate 130 arranged between the bottom plate 120 and the top plate 110. The bottom plate 120 and the top plate 110 are connected by fasteners, and the side plate 130 is also connected to the top plate 110 and the bottom plate 120 by fasteners; of course, the bottom plate 120 and the top plate 110 can also be connected by the side plate 130, the top end of the side plate 130 is connected to the top plate 110 by bolts, and the bottom end of the side plate 130 is connected to the bottom plate 120 by bolts.

[0062] I-beams 140 are also provided at both ends of the test platform 100 in the length direction. The I-beams 140 are located between the top plate 110 and the bottom plate 120. The I-beams 140 are connected to the top plate 110 and the bottom plate 120 by fasteners such as bolts. By providing the I-beams 140, the support strength between the top plate 110 and the bottom plate 120 can be enhanced.

[0063] According to one embodiment of the present invention, since the support platform has a large area, in order to facilitate the installation of the top plate 110, the top plate 110 is assembled from a plurality of sub-top plates 110, and the upper surface of the test platform 100 is formed by assembling the sub-top plates 110 one by one. A plurality of support pads 150 are arranged at intervals at the bottom of the bottom plate 120 to facilitate the support of the bottom plate 120 on the workbench. It can be understood that in order to facilitate tightening the nuts on the bottom surface of the test platform 100, the test platform 100 can be placed on the workbench, and the workbench includes a plurality of support platforms arranged at intervals, so that the bottom surface of the test platform 100 can be suspended in the air, so that the nuts can be tightened from the bottom surface of the test platform 100.

[0064] According to one embodiment of the present invention, the actuator 600 includes an actuator body 610 and joint hinges 620 connected to the actuator body 610 at both axial ends. The actuator body 610 has a built-in displacement sensor. A load sensor 630 is provided between the actuator body 610 and one of the joint hinges 620. Each actuator 600 can realize displacement loading and force loading.

[0065] According to one embodiment of the present invention, Figure 6 and Figure 7 As shown, each actuator 600 is connected to the main oil circuit through an independent servo valve and a distributor. Specifically, each actuator 600 supplies oil, returns oil, and discharges oil through its own distributor, wherein the oil supply and return oil circuits flow through the actuator 600 through the servo valve. Each actuator 600 is an independent channel, which can well solve the problem of mutual interference between the actuators 600 during loading, especially interference during loading in the same direction; during the same test loading, displacement loading and force loading can be carried out simultaneously.

[0066] Two groups of frames can also be installed on the test platform 100 of this embodiment at the same time, and the required actuators 600 are installed on each group of frames. The actuators 600 are connected to the servo control system. The actuators 600 on each group of frames work independently without interfering with each other. Each actuator 600 acts as an independent channel without interfering with each other. Each channel can switch between load loading control and displacement loading control without causing abnormal movement.

[0067] In order to facilitate the installation of the actuator 600 on the frame and to facilitate the actuator 600 to apply force to the bogie 900, according to an embodiment of the present invention, the joint hinges 620 at both ends of the actuator 600 are connected to the transition pad 640 through fasteners, and connecting holes are provided on the joint hinges 620 and the transition pad 640. One end of the actuator 600 is fixed to the square steel pipe through the transition pad 640. The square steel pipe can be the above-mentioned cross beam 300, the first longitudinal beam 400 or the second longitudinal beam 500, etc. The other end of the actuator 600 loads the bogie 900 through the transition pad 640.

[0068] On the other hand, an embodiment of the present invention further provides a loading test method of a bogie loading test system, comprising the following steps:

[0069] According to the characteristic parameters of the bogie to be tested and the number, position and load size of the loading points required by the test, the matching actuator is first selected, and then the layout of the frame and the installation plan of the actuator are determined. The test plan of the bogie to be tested is obtained through three-dimensional modeling.

[0070] According to the test plan, a frame is mounted on the test platform, and each actuator is installed on the frame.

[0071] A target load spectrum is determined, and the target load spectrum is introduced into the servo control system after preprocessing.

[0072] The following data processing is performed in the servo control system: according to the target load spectrum required by the test, the control signal of the actuator corresponding to each loading point is decomposed to obtain the control signal of a single actuator; the interference of a single actuator on other loading points when loading its corresponding loading point is calculated separately, and the control signal of the actuator corresponding to other loading points is compensated according to the corresponding interference value; when loading with multiple degrees of freedom, the control signal of each actuator is continuously iterated and compensated according to the coupling relationship of each loading position until the test accuracy requirements are met; thereby, the influence of interference can be eliminated, making the test results more accurate.

[0073] Finally, the servo control system outputs a control signal to control the actuator to load the test part of the bogie, thereby completing the loading test. The frame size and shape and the installation position of the actuator can be adjusted according to the required bogie type to adapt to different types of bogies for testing, which solves the problem that the previous bogie test loading system can only test one type of bogie, and multiple types of bogies require multiple bogie test loading systems. The waste of resources can be achieved by realizing a loading test system that adapts to the loading tests of multiple types of bogies, making full and reasonable use of resources and saving costs.

[0074] like Figure 6 and Figure 7 As shown, each actuator 600, the sensors and valves equipped on the distributor are controlled by independent control channels, and there is no interference between the control channels; the servo control system has an experimental grouping function, and any number of actuators 600 can be selected as a group in the servo control system. When controlling any group of actuators 600, there is no interference with other groups of actuators 600. It can effectively compensate for the amplitude attenuation and phase lag in the dynamic force loading process of each degree of freedom.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bogie loading test system, characterized in that: include: A test platform, suitable for placing the bogie, wherein the surface of the test platform is provided with first mounting holes arranged in a matrix; A column, wherein the outer surface and both end surfaces of the column are provided with second mounting holes arranged in a matrix, and the column is fixedly connected to the test platform through the second mounting holes and the first mounting holes provided at the bottom end of the column through a first connecting member; A crossbeam, wherein at least the upper and lower surfaces and the two end surfaces of the crossbeam are provided with third mounting holes arranged in a matrix, and along the lateral direction of the test platform, the two ends of the crossbeam are connected between the adjacent columns, and the crossbeam is fixedly connected to the columns through the second mounting holes provided on the outer peripheral surfaces of the columns through the second connecting member and the third mounting holes at the two ends of the crossbeam; A first longitudinal beam, the outer surface of which is provided with fourth mounting holes arranged in a matrix, the first longitudinal beam being laid on the upper surface of the adjacent cross beam along the longitudinal direction of the test platform, and the first longitudinal beam being fixedly connected to the cross beam through the third mounting holes and the fourth mounting holes provided on the upper and lower surfaces of the cross beam via a third connecting member; A second longitudinal beam, the outer surface of which is distributed with fifth mounting holes arranged in a matrix, the second longitudinal beam is fixed to the outer side surface of the adjacent column along the longitudinal direction of the test platform, and the second longitudinal beam is fixedly connected to the column through the second mounting holes and the fifth mounting holes provided on the outer surface of the column by a fourth connecting member; A plurality of actuators, each independently connected to a servo control system, wherein the plurality of actuators are mounted on at least one of the column, the cross beam, the first longitudinal beam, and the second longitudinal beam, and the actuators are controlled by the servo control system to load the test part of the bogie; The following data processing is performed in the servo control system: according to the target load spectrum required by the test, the control signal of the actuator corresponding to each loading point is decomposed to obtain the control signal of a single actuator; the interference of a single actuator on other loading points when loading its corresponding loading point is calculated respectively, and the control signal of the actuator corresponding to other loading points is compensated according to the corresponding interference value; when loading with multiple degrees of freedom, the control signal of each actuator is continuously iterated and compensated according to the coupling relationship of each loading position until the test accuracy requirements are met; The servo control system outputs a control signal to control the actuator to load the test part of the bogie.

2. The bogie loading test system according to claim 1, characterized in that: The two ends of the column are provided with a first flange, the first flange is distributed with the second mounting holes, and the column is fixedly connected to the test platform through the first flange; It also includes a mounting plate, a countersunk hole is provided on the surface of the mounting plate, the mounting plate is connected to the test platform via a fastener, and the column is connected to the mounting plate via the first connecting piece.

3. The bogie loading test system according to claim 1, characterized in that: The two ends of the cross beam are provided with second flanges, the second flanges are provided with the third mounting holes, and the two ends of the cross beam are fixedly connected to the columns through the second flanges respectively.

4. The bogie loading test system according to claim 1, characterized in that: The number of the columns is four, the number of the cross beams is two, the number of the first longitudinal beams is two, the number of the second longitudinal beams is two, the four columns are fixed vertically on the test platform in pairs, the two cross beams are fixed horizontally and parallelly between the two pairs of columns, the two first longitudinal beams are fixed horizontally and parallelly to the top surfaces of the two cross beams, and the two second longitudinal beams are fixed horizontally and parallelly to the outer sides of the two pairs of columns.

5. The bogie loading test system according to any one of claims 1 to 4, characterized in that: The columns, the cross beams, the first longitudinal beams and the second longitudinal beams are all square steel pipes of consistent specifications, the surfaces of the square steel pipes are evenly distributed with mounting holes, the distribution density of the mounting holes and the sizes of the mounting holes are consistent, and the mounting holes on the opposite sides of each square steel pipe are arranged one by one.

6. The bogie loading test system according to any one of claims 1 to 4, characterized in that: The test platform comprises a bottom plate, a top plate arranged opposite to the bottom plate, and a side plate arranged between the bottom plate and the top plate, wherein the bottom plate and the top plate are connected by fasteners, and the side plate is also connected to the top plate and the bottom plate by fasteners; I-beams are also provided at both ends of the test platform in the length direction. The I-beams are located between the top plate and the bottom plate. The I-beams are connected to the top plate and the bottom plate via fasteners.

7. The bogie loading test system according to claim 6, characterized in that: The top plate is assembled from a plurality of sub-top plates, and a plurality of supporting pads are arranged at intervals at the bottom of the bottom plate.

8. The bogie loading test system according to claim 1, characterized in that: The actuator comprises an actuator body and joint hinges connected to the two axial ends of the actuator body. A displacement sensor is built into the actuator body, and a load sensor is provided between the actuator body and one of the joint hinges.

9. The bogie loading test system according to claim 8, characterized in that: Each of the actuators is connected to the main oil circuit via an independent servo valve and a distributor.

10. The bogie loading test system according to claim 5, characterized in that: The joint hinges at both ends of the actuator are connected to the transition pads through fasteners, and connecting holes are provided on the joint hinges and the transition pads. One end of the actuator is fixed to the square steel pipe through the transition pad, and the other end of the actuator loads the bogie through the transition pad.

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