CN101561339B - Dynamic Detection System for Stiffness Parameters of Closed-loop Spline-braced Rail Vehicle Bogies - Google Patents

Abstract

The invention relates to a dynamic detection device for rail vehicle parameters, in particular to a dynamic detection system for a closed-loop diagonally braced rail vehicle bogie stiffness parameter. It consists of a mechanical system, a test system and a control system. The mechanical system includes: body longitudinal thrust seat assembly (II), closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic testing platform (III), hoisted upper beam Pillar (V), in which the closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic detection platform (III) is mainly composed of closed-loop diagonally braced vertical loading gantry (A), plane loading platform (B), adjustable gauge bridge approach device ( C), bogie longitudinal thrust assembly (D), simulated bolster (F); the test system includes a displacement detection system (G) and a six-dimensional force sensor (c); the control system is mainly composed of a hydraulic control system and an electrical control system and computer systems. The system can dynamically test the stiffness parameters of the bogie in the vehicle and independent states.

Description

Dynamic Detection System for Stiffness Parameters of Closed-loop Spline-braced Rail Vehicle Bogies

technical field

The invention relates to rail vehicle parameter detection equipment, in particular to a closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic detection system.

Background technique

1. The technical situation of bogie testing equipment of foreign companies

Some companies in Germany and France calculated and optimized the suspension parameters of the bogie according to the route spectrum during the development of the new bogie, but this is only a theoretical calculation. After the bogie is assembled, the primary, secondary, torsion and overall Whether the suspension parameters meet the design requirements must be obtained through the parameter test bench, and appropriate corrections must be made.

The Ground Transportation Technology Research Center (CSTT) affiliated to the National Research Institute of Canada (NRC) developed a special bogie characteristic parameter test bench in the 1980s, which is mainly used to test the shear stiffness and resistance between the bogie wheelsets. Bending stiffness and other parameters. In recent years, German Wind-Hoff Company, American Standard Car Truck Company (SCT) and ABC-NACO Company, as well as Canadian Bombardier Company have all conducted research on the detection technology of train bogies, put forward corresponding technical solutions and developed bogie parameters. However, in addition to the high price, these equipments are not well satisfied for the vehicle test and the vertical, longitudinal, lateral and rotational stiffness tests of the primary and secondary suspension devices.

2. The technical status of domestic bogie parameter test bench

At present, Southwest Jiaotong University in China has a certain experience base in bogie testing technology, and the university has a national key laboratory and testing equipment. In China, whether it is a locomotive, freight car or passenger car steering frame, the selection and calculation of dynamics and the rolling vibration test of the whole vehicle are all completed in Southwest Jiaotong University during the research and development of new bogies in China. The performance in the dynamic detection of parameters is insufficient, and the degree of automation is low.

Domestic railway manufacturing companies did not have bogie parameter testing equipment before, but with the development of railway vehicles, the introduction of 300km/h and 400km/h technology for railway passenger cars, and the development of railway freight cars to heavy loads, bogie parameter testing equipment has become more and more advanced. The more important, Zhuzhou Electric Locomotive Works and Qingdao Sifang Company have planned to set up bogie overall parameter testing equipment recently.

Therefore, a dynamic detection system for rail vehicle bogie parameters with reasonable structure, accurate test results, and simple operation methods should be developed to check whether the bogie parameters are qualified and ensure the safety, stability and dynamic performance of the vehicle. It is an urgent task to be solved.

Contents of the invention

The object of the present invention is to provide a dynamic detection system for the stiffness parameters of a closed-loop sprag-braced rail vehicle bogie to meet the needs of the detection of main dynamic parameters of the rail vehicle bogie in various operating states. The detection system adopts a reasonable load The structural design of the simulation system can carry out dynamic testing of the bogie stiffness parameters in the vehicle state, and can meet the vertical stiffness, longitudinal stiffness, transverse stiffness, bending stiffness, and shear resistance of the primary and secondary suspension devices of the bogie. Dynamic detection requirements for different parameters such as stiffness and overall rotation stiffness. Its hydraulic control method adopts the force closed-loop control method of electro-hydraulic servo. Through the six-dimensional force sensor, the load force on the wheel set can be fed back to the computer control system for data processing and control. The programming and automation of the test steps make the dynamic detection of the bogie stiffness parameters at different frequencies and different amplitude characteristics more accurate and efficient.

Above-mentioned purpose of the present invention is achieved in that, in conjunction with accompanying drawing, description is as follows:

A closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system is mainly composed of a mechanical system, a test system and a control system. The mechanical system includes: a vehicle body longitudinal thrust seat assembly II, a closed-loop tilt Stiffness parameter dynamic detection platform III of braced rail vehicle bogie, two hoisting upper beam pillars V, of which two hoisting upper beam pillars V are fixedly arranged on one of dynamic detection platform III for stiffness parameter of closed-loop diagonally braced rail vehicle bogie On the side, the body longitudinal thrust seat assembly II is fixedly arranged at the front end of the dynamic detection platform III for the stiffness parameters of the closed-loop splined rail vehicle bogie; the test system includes twelve displacement detection systems G and four six-dimensional force sensors c, of which Twelve displacement detection systems G are respectively arranged at both ends of the simulated vibrating beam F of the bogie E, the lower end of the body of the vehicle VI to be tested and the four wheels, and four six-dimensional force sensors c are respectively arranged at the steering under the four wheels of the frame E, and are fixedly connected with the positioning and clamping systems e of the four wheel sets respectively; the control system is mainly composed of a hydraulic control system, an electrical control system and a computer system, and is centrally arranged in the computer control room IV, among which The computer control room IV is fixedly arranged on one side of the dynamic detection platform III for the stiffness parameters of the closed-loop sprag-braced rail vehicle bogie.

The closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic detection platform III is mainly composed of a closed-loop diagonally braced vertical loading gantry A, a plane loading platform B, an adjustable gauge bridge approach device C, and a bogie longitudinal thrust assembly D and simulated corbel F, the closed-loop diagonally braced vertical loading gantry A is fixedly connected to the reference platform a of the plane loading platform B, and the two adjustable gauge bridge approach devices C are fixed on the benchmark platform B of the plane loading platform B by bolts. On platform a, each bogie longitudinal thrust assembly D is fixedly connected to the reference platform a through multiple longitudinal thrust seat bolts 9, and the simulated bolster F is floatingly connected to the bogie E, and the reference platform a of the plane loading platform B passes through Ground anchor 4 is fixed on the civil foundation 1.

The plane loading platform B includes: a reference platform a, a transverse oil cylinder assembly b, a longitudinal oil cylinder assembly f and a wheel set positioning clamping device e, wherein the reference platform a is fixedly connected by multiple cast iron platforms through bolts , and fixed on the civil foundation I through a plurality of ground anchors 4, two horizontal oil cylinder assemblies b and four longitudinal oil cylinder assemblies f are fixedly connected with the reference platform a through socket head cap screws, and two small platforms d adopt two-way rolling The slide rail is connected with the reference platform a by sliding fit, two six-dimensional force sensors c are fixed on each small platform d, and the plate groove guide rail 21 of the wheel set positioning and clamping device e is fixedly connected with the six-dimensional force sensor c by means of screws.

The described transverse oil cylinder assembly b includes: oil cylinder guide rail lead screw 24, spoke type force sensor 26, transverse oil cylinder supporting base 32 and transverse oil cylinder 34, wherein the tail end of transverse oil cylinder 34 is fixedly connected with transverse oil cylinder extension pipe 35, transverse oil cylinder The front end shaft hole of the oil cylinder extension pipe 35 is coaxially connected with the small platform center hole 42 of the small platform d, and the front end of the transverse oil cylinder 34 is coaxially connected with a spoke-type force sensor 26, and the spoke-type force sensor 26 is connected to the transverse oil cylinder support seat 32 Hinged, the horizontal oil cylinder support seat 32 is slidingly fitted with the horizontal oil cylinder guide rail seat 36, and one end of the oil cylinder guide rail lead screw 24 is threadedly connected with the screw nut 30 fixed on the horizontal oil cylinder support seat 32, and the other end is connected with the thread screw nut 30 fixed on the horizontal oil cylinder The through holes of the horizontal oil cylinder guide rail lead screw support seat 33 on the guide rail seat 36 are coaxially connected, the horizontal oil cylinder guide rail seat 36 is fixed on the reference platform a, and the horizontal oil cylinder 34 is independently controlled by a servo valve.

The longitudinal oil cylinder assembly f includes: oil cylinder guide rail screw 24, longitudinal oil cylinder 25, spoke type force sensor 26 and longitudinal oil cylinder support seat 31, wherein one end of oil cylinder guide rail screw 24 is fixed on the longitudinal oil cylinder support seat 31 The lead screw nut 30 is threaded and connected, and the other end is coaxially connected with the through hole of the longitudinal oil cylinder guide rail lead screw support seat 28 fixed on the longitudinal oil cylinder guide rail seat 29; the tail end of the longitudinal oil cylinder 25 is fixedly connected with a longitudinal oil cylinder connecting pipe 23. The longitudinal oil cylinder extension pipe 23 is hinged with the longitudinal oil cylinder support seat 31, and the longitudinal oil cylinder support seat 31 is slidingly fitted with the longitudinal oil cylinder guide rail seat 29. The front end of the longitudinal oil cylinder 25 is coaxially fixedly connected with the spoke force sensor 26, and the spoke force The sensor 26 is hinged with the small platform longitudinal thrust box 27 fixed on the small platform d, and the longitudinal oil cylinder 25 is independently controlled by a servo valve.

The wheel set positioning and clamping system e includes: two internal snap-in wheel chocks 18 for fixing each wheel, a plate groove guide rail 21 and a wheel elbow fixture 20, and the two internal snap-in wheel chocks 18 pass through Adjusting screw rod 19 is connected as a whole, and is connected with plate groove guide rail 21 by sliding fit, and wheel elbow clamp 20 is fixedly connected with plate groove guide rail 21 by bolts.

The adjustable gauge bridge approach device C can be adjusted according to bogies of different gauges, and the movable track groove 6 is installed on the wheel crossing bridge 5, which is combined into a slidingly connected whole, and can be adjusted by adjusting the bridge leading screw 7 Move the position of track groove 6.

Each bogie longitudinal thrust seat assembly D includes: T70 thrust screw 8, bogie longitudinal thrust beam 10 and longitudinal thrust seat 11, wherein the T70 thrust screw 8 is connected with the bogie longitudinal thrust The beam 10 is connected by sliding fit, the bogie longitudinal thrust beam 10 is fixed on the longitudinal thrust seat 11, and the longitudinal thrust seat 11 is fixed on the reference platform a.

Each hoisting-type upper beam pillar V includes: a hoisting-type upper beam pillar 12 and several pillar anchor bolts 13 . The hoisting type upper beam pillar 12 is fixedly connected with the civil foundation 1 by the pillar anchor bolt 13.

The vehicle body longitudinal thrust seat assembly II includes: vehicle body connecting rod 14, thrust seat base plate 15, vehicle body fixed support 16 and several thrust seat anchor bolts 17, wherein the vehicle body connecting rod 14 is fixedly connected to the body On the fixed support 16, the fixed support 16 of the vehicle body is connected with the sliding fit of the thrust base base plate 15, and the thrust base base plate 15 is fixedly connected on the civil construction foundation 1.

The bogie displacement measurement system G includes: a frame grating displacement sensor 40, a measuring plate 39, a magnetic gauge base 38 and a grating ruler mounting frame 37, wherein the magnetic gauge base 38 on one side of the measuring plate 39 is attached to the frame Or on the wheel set, the grating type displacement sensor 40 is fixed on the grating scale mounting frame 37, the change of the resistance strain gauge resistance value of the sensor is converted into a variable voltage output by the bridge, the signal conditioning is carried out by the amplifier circuit, and the computer interface circuit is used to perform signal conditioning. A/D conversion and sent to the computer for processing.

The hydraulic control system includes: quantitative pump, servo valve and servo amplifier control elements. The system adopts electro-hydraulic servo closed-loop force feedback control. Flow valve setting and control;

The pressure is displayed by the pressure gauge. The actuator of the system is a hydraulic cylinder. Through the control of the electro-hydraulic servo valve, the piston of the hydraulic cylinder moves in the required direction and drives the bogie to move, and exerts the set force;

The servo valve adopts the moving iron torque motor nozzle baffle type two-stage electro-hydraulic servo valve, and a fine filter with pollution indicator is installed in front of each servo valve;

The system is also equipped with auxiliary components including a liquid level gauge, a temperature regulator, an oil suction and return filter, and an accumulator. The hydraulic system and the microcomputer control system perform closed-loop feedback control on the test bench.

The hydraulic control system includes: quantitative pump, servo valve and servo amplifier control element control, and includes: force, displacement and switch value sensors, controllers and transmitters, the main control machine is an industrial control machine, through data acquisition The card monitors and controls the hydraulic system, and the action command of the detection platform is issued by the industrial control machine, which enters the servo valve amplifier through the D/A interface to amplify the signal and output the current signal. According to the motion frequency and amplitude set by the software, the hydraulic cylinder piston presses The required direction and the set force are reciprocatingly loaded, and the hydraulic cylinder drives the wheelset of the bogie to move while telescopically moving.

The electrical control system is mainly composed of hardware, software and safety protection devices, and the hardware includes: A/D, D/A acquisition card, I/O interface card, industrial control machine, control cabinet, regulated power supply, servo control unit and signal conditioner, as well as external signal output ports with external command signal input and feedback; software includes: system management, control management, servo control, vibration control, fault diagnosis and fault handling, with selection of different bogie test programs, automatic The function of collecting and storing the measurement results and displaying the results in real time; according to the load, amplitude and frequency requirements required by the test, the user makes corresponding settings and controls the action of the servo valve to meet the loading requirements; the control system has 8 actions Coordinated loading capability of actuator linkage, and at the same time, each actuator can be controlled independently, and various types of monotonic loading and periodic loading can be set to realize signal reproduction of given frequency, waveform, and amplitude; the safety protection device in the electrical control system is on the test There are alarm and automatic shutdown functions for displacement and force overload in the process, and accidental cracking of the tested bogie.

The technical effect of the present invention is: a closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system, which is composed of a mechanical system, a testing system and a control system. The bogie parameter dynamic detection system solves the problem that the bogie cannot meet the design performance requirements after manufacture due to manufacturing process and other factors. The dynamic performance of the bogie after parameter detection and adjustment in the dynamic test process can meet the requirements once, which greatly shortens the product development cycle and saves a lot of test funds. The successful development of the detection system will accelerate It plays an important role in the upgrading process of my country's railway wagon products. It has a very broad application prospect and has considerable social and economic benefits.

Description of drawings

Fig. 1 Dynamic detection system for stiffness parameters of closed-loop sprag-braced rail vehicle bogies;

Fig. 2 Dynamic testing platform for stiffness parameters of closed-loop sprag-braced rail vehicle bogies;

Fig. 3 dynamic detection platform (front view) for stiffness parameters of closed-loop sprag-braced rail vehicle bogie;

Fig. 4 dynamic detection platform (top view) of the stiffness parameter of the closed-loop diagonally braced rail vehicle bogie;

Fig. 5 schematic diagram of plane loading platform;

Figure 6 Schematic diagram of the benchmark platform;

Figure 7 The bottom view of the reference platform;

Figure 8 is a schematic diagram of an adjustable gauge bridge approach device;

Figure 9 is a schematic diagram of the longitudinal thrust assembly of the bogie;

Fig. 10 is a schematic diagram of hoisting type upper beam pillar assembly;

Fig. 11 Schematic diagram of body longitudinal thrust seat assembly;

Figure 12 Schematic diagram of bogie simulated corbel;

Figure 13 schematic diagram of wheel set positioning and clamping device;

Fig. 14 enlarged schematic diagram of partial oil cylinder assembly;

Fig. 15 schematic diagram of longitudinal oil cylinder assembly;

Fig. 16 schematic diagram of transverse oil cylinder assembly;

Figure 17 is a schematic diagram of the local displacement detection system;

Figure 18 schematic diagram of displacement detection system;

Figure 19 Left view of the displacement detection system;

Figure 20 Schematic diagram of the small platform;

Figure 21 The lower view of the small platform;

Fig. 22 Schematic diagram of bogie vertical stiffness parameter test passing;

Figure 23 Schematic diagram of the testing process of the bogie longitudinal stiffness parameters;

Figure 24 Schematic diagram of the testing process of the bogie lateral stiffness parameters;

Figure 25 Schematic diagram of the testing process of the bending stiffness parameters of the bogie;

Figure 26 Schematic diagram of the testing process of the bogie shear stiffness parameters;

Figure 27 Schematic diagram of the testing process of the overall slewing stiffness parameters of the bogie;

Fig. 28 schematic diagram of hydraulic control system;

Figure 29 is a schematic diagram of a servo force closed-loop feedback control system;

Fig. 30 schematic diagram of electrical control system and computer system;

In the figure: I- civil engineering foundation; II- vehicle body longitudinal thrust seat assembly; III- dynamic testing platform for stiffness parameters of closed-loop diagonally braced rail vehicle bogie; IV- computer control room; V- hoisting upper beam pillar; VI- The vehicle to be tested;

A-closed-loop diagonally braced vertical loading gantry; B-plane loading platform; C-adjustable gauge bridge approach device; D-bogie longitudinal thrust assembly; E-bogie; F-simulated corbel; G-displacement Detection Systems;

a-reference platform; b-transverse cylinder assembly; c-six-dimensional force sensor; d-small platform; e-wheel set positioning and clamping device; f-longitudinal cylinder assembly;

1-2×4.4×0.5m cast iron platform; 2-3×6×0.5m cast iron platform; 3-2×6×0.5m cast iron platform; 4-ground anchor; 5-wheel bridge; 6-moving track groove ;7-bridge screw; 8-T70 thrust screw; 9-longitudinal thrust seat bolt; 10-bogie longitudinal thrust beam; 11-longitudinal thrust seat; 12-lifting upper beam pillar; 13 pillar Anchor bolts; 14-body connecting rod; 15-thrust seat base plate; 16-body fixed support; 17-thrust seat anchor bolts; Elbow fixture; 21-plate groove guide rail; 22-oil cylinder hinge; 23-longitudinal oil cylinder extension pipe; 24-oil cylinder guide rail screw; 25-longitudinal oil cylinder; 26-spoke force sensor; 27-small platform longitudinal thrust Box; 28-longitudinal oil cylinder guide rail screw support seat; 29-longitudinal oil cylinder guide rail seat; 30-screw nut; 31-longitudinal oil cylinder support seat; 32-horizontal oil cylinder support seat; 33-horizontal oil cylinder guide rail screw support seat; 34-horizontal oil cylinder; 35-horizontal oil cylinder connecting long pipe; 36-horizontal oil cylinder guide rail seat; 37-grating ruler mounting frame; 38-magnetic meter base; Longitudinal thrust box threaded hole; 42-small platform center hole.

Detailed ways

Below in conjunction with the embodiment given with accompanying drawing, the patented structure of the present invention is described in further detail.

Referring to Figures 1, 2, 3, 4, and 5, the dynamic detection system for the stiffness parameters of the closed-loop sprag-braced rail vehicle bogie is composed of a mechanical system, a testing system and a control system, wherein the mechanical system includes: a vehicle body longitudinal thrust seat assembly Formation II, a closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic testing platform III, and two hoisting upper beam pillars V. Among them, the two hoisting upper beam pillars V are fixedly arranged on one side of the dynamic detection platform III for the stiffness parameters of the closed-loop slant-braced rail vehicle bogie, and the body longitudinal thrust seat assembly II is fixedly arranged on the rigidity parameter of the closed-loop slant-braced rail vehicle bogie. The front end of the parameter dynamic detection platform III; the test system includes twelve displacement detection systems G and four six-dimensional force sensors c, of which the twelve displacement detection systems G are respectively arranged at both ends of the simulated vibration beam F of the bogie E place, the lower end of the vehicle body VI of the vehicle to be tested and the four wheels. Four six-dimensional force sensors c are respectively arranged under the four wheels of the bogie E, and are fixedly connected with the four wheel set positioning and clamping systems e; the control system is mainly composed of a hydraulic control system, an electrical control system and a computer system. The industrial control machine installed in the computer control room IV completes the acquisition of measurement signals, the transmission of control signals and the processing of data. The system can realize two dynamic detection functions of the vehicle bogie and independent bogie stiffness parameters.

Referring to Figures 1, 2, 3, and 22, the closed-loop diagonally braced vertical loading gantry A of the closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic detection platform III is fixedly connected to the reference platform a of the plane loading platform B, and the independent bogie During the testing process of stiffness parameters, the closed-loop diagonally braced vertical loading gantry A can carry out dynamic synchronous loading and deflection loading of the vertical load on the simulated corbel F, and can carry out lateral X-direction positioning of the bogie, and then exert a force on the bogie Different vertical loads realize the detection of vertical stiffness parameters. During the testing process of the stiffness parameters of the vehicle bogie, the upper beam part of the closed-loop diagonally braced vertical loading gantry A can be transferred to one side and hoisted on the hoisting upper beam pillar V to ensure that the vehicle body drives into the plane loading platform B It can also locate the bogie and the body in the lateral X direction, so as to realize the dynamic detection of the stiffness parameters of the whole vehicle bogie.

Referring to Fig. 5, 6, 7, the reference platform a is composed of two 2 × 4.4 × 0.5 meter cast iron platforms 1, two 3 × 6 × 0.5 meter cast iron platforms 2, two 2 × 6 × 0.5 meter cast iron platforms 3 and more Each cast iron platform is fixedly connected with other cast iron platforms by means of bolts, and is fixedly connected with the civil foundation 1 through a plurality of ground anchors 4. Each cast iron platform adopts a cast iron casting process. A honeycomb structure is used inside to reduce the overall mass and ensure strength, and the overall levelness of the six platforms can be adjusted by adjusting multiple ground anchors 4 .

Referring to Figures 5, 14, 15, 16, 20, 23, 24, 25, 26, 27, the horizontal oil cylinder assembly b includes: oil cylinder hinge 22, oil cylinder guide rail screw 24, spoke force sensor 26, screw nut 30 , horizontal oil cylinder support seat 32, horizontal oil cylinder guide rail lead screw support seat 33, horizontal oil cylinder 34, horizontal oil cylinder extension pipe 35 and horizontal oil cylinder guide rail seat 36, wherein the tail end of the transverse oil cylinder 34 is fixed with the horizontal oil cylinder extension pipe 35 by screws Connect, the front end shaft hole of transverse oil cylinder extension pipe 35 is coaxially connected with the small platform center hole 42 of small platform d. The front end of the transverse oil cylinder 34 is coaxially fixedly connected with the spoke force sensor 26 through screws, the spoke force sensor 26 is hinged with the transverse oil cylinder support seat 32 through the oil cylinder hinge 22, and the transverse oil cylinder support seat 32 is slidingly fitted with the transverse oil cylinder guide rail seat 36. The lead screw nut 30 is fixedly connected with the horizontal oil cylinder support seat 32 by screws, one end of the oil cylinder guide rail lead screw 24 is threadedly connected with the lead screw nut 30, and the other end is coaxially connected with the through hole of the transverse oil cylinder guide rail lead screw support seat 33 , the horizontal oil cylinder guide rail lead screw support seat 33 is fixedly connected with the horizontal oil cylinder guide rail seat 36 by screws, and the horizontal oil cylinder guide rail seat 36 is fixedly connected with the reference platform a by screws; the longitudinal oil cylinder assembly f includes: oil cylinder hinge 22, longitudinal oil cylinder extension pipe 23. Oil cylinder guide rail screw 24, longitudinal oil cylinder 25, spoke force sensor 26, small platform longitudinal thrust box 27, longitudinal oil cylinder guide rail screw support seat 28, longitudinal oil cylinder guide rail seat 29, screw nut 30 and longitudinal oil cylinder support Seat 31, wherein the tail end of the longitudinal oil cylinder 25 is fixedly connected with the longitudinal oil cylinder extension pipe 23 by screws, the longitudinal oil cylinder extension pipe 23 is hinged with the longitudinal oil cylinder support seat 31 through the oil cylinder hinge 22, and the longitudinal oil cylinder support seat 31 is connected with the longitudinal oil cylinder guide rail seat 29 is connected by sliding fit, and the lead screw nut 30 is fixedly connected with the longitudinal oil cylinder support seat 31 by screws. The through holes are coaxially connected, the longitudinal oil cylinder guide rail lead screw support seat 28 is fixedly connected with the longitudinal oil cylinder guide rail seat 29 by screws, and the longitudinal oil cylinder guide rail seat 29 is fixedly connected with the reference platform a by screws; The sensor 26 is coaxially fixedly connected, and the spoke type force sensor 26 is hinged with the longitudinal thrust box 27 of the small platform through the cylinder hinge 22, and the longitudinal thrust box 27 of the small platform is threaded with the longitudinal thrust box of the small platform d through screw connection. The hole 41 is threaded for connection. The adjustment of two horizontal cylinders 34 in the longitudinal Y position and the adjustment of the four longitudinal cylinders 25 in the horizontal X direction can be realized by rotating the cylinder guide rail screw 24, so as to meet the needs of different types of bogie tests. Through the independent control of the six oil cylinders, the two small platforms d can be dynamically loaded in the transverse, longitudinal and rotational directions, and then the wheel set of the bogie E can be loaded to complete the lateral stiffness, longitudinal stiffness, and resistance of the bogie. Dynamic detection of bending stiffness, shearing stiffness and overall slewing stiffness parameters, in which the control signals of the servo valves of each oil cylinder are sent by the industrial control computer to execute action commands such as loading, unloading, and pressure keeping.

Referring to Figures 5 and 13, considering the accurate positioning of the wheel set and the convenience of clamping, etc., the wheel set positioning and clamping system e adopts a convenient and flexible manual adjustment method, in which the two internal clip-type wheel chocks 18 that fix each wheel are adjusted The screw rod 19 is connected as a whole, and is slidably connected with the plate groove guide rail 21, and the wheel elbow fixture 20 is fixedly connected with the plate groove guide rail 21 by bolts. By adjusting the adjusting screw 19 and the wheel elbow fixture 20, the wheel set can be positioned and clamped, which plays an auxiliary role in the test.

Referring to Fig. 8, the adjustable gauge bridge approach device C can be adjusted according to the bogies of different gauges, and the movable track groove 6 is installed on the wheel bridge 7, which is combined into a slidingly connected whole, and can be adjusted by adjusting the bridge screw 5. The position of the moving track groove 6 is adjusted, so as to realize the accuracy and reliability of the stage-on process and positioning process of bogies with different gauges.

Referring to Figures 2, 3, 4, and 9, each bogie longitudinal thrust seat assembly D includes: two T70 thrust screw screws 8, several longitudinal thrust seat bolts 9, a bogie longitudinal thrust beam 10, two A longitudinal thrust seat 11. Among them, the T70 thrust screw 8 is slidingly fitted with the bogie longitudinal thrust beam 10, the bogie longitudinal thrust beam 10 is fixedly connected with the longitudinal thrust seat 11 through bolts, and the longitudinal thrust seat 11 is fixedly connected with the reference platform a through bolts . During the detection process, the T70 thrust screw 8 of the bogie longitudinal thrust seat assembly D leans against the frame of the bogie E to ensure the positioning of the bogie frame in the longitudinal X direction. Considering the different types of bogies The heights are different, so there are many vertical Z-direction rib holes on the longitudinal thrust seat 11, and the bogie longitudinal thrust beam 10 can be adjusted in the vertical Z-direction installation height according to the bogie model, and then the T70 thrust wire can be adjusted. The height of bar 8.

Referring to Figures 1 and 10, each hoisting-type upper beam pillar V includes: a hoisting-type upper beam pillar 12 and several pillar anchor bolts 13 . The hoisting type upper beam pillar 12 is fixedly connected with the civil foundation 1 by the pillar anchor bolt 13. The two hoisting upper beam pillars V are installed on the side of the dynamic testing platform III for the stiffness parameters of the closed-loop slanted rail vehicle bogie, so as to ensure that the vehicle body can freely enter the testing position.

Referring to Fig. 1, 11, vehicle body longitudinal thrust seat assembly II comprises: vehicle body connecting rod 14, thrust seat base plate 15, vehicle body fixed support 16 and several thrust seat anchor bolts 17. Wherein the vehicle body connecting rod 14 is fixedly connected with the vehicle body fixed support 16 by screws, the vehicle body fixed support 16 is connected with the thrust base base plate 15 by sliding fit, and the thrust base base plate 15 is connected with the civil construction foundation 1 by the thrust base anchor bolt 17. Fixed connection. According to different vehicle body lengths of different models, the fixed support 16 of the vehicle body can be freely adjusted in the longitudinal Y direction of the base plate 15 of the thrust base, and the fixed support 16 of the vehicle body can be tightly fixed to the fixed support 16 by the bolts on the fixed support 16 of the vehicle body. Push the relative position of the base plate 15. In addition, the vehicle body fixed support 16 is provided with numerous vertical Z-direction threaded holes, and the vehicle body connecting rod 14 is adjusted in the vertical Z direction on the vehicle body fixed support 16 according to different signal vehicle heights.

Referring to Fig. 17, 18, 19, the bogie displacement measuring system G comprises a frame grating type displacement sensor 40, a measuring plate 39, a magnetic gauge base 38 and a grating scale mounting frame 37, wherein the magnetic gauge base on one side of the measuring plate 39 is installed 38 is adsorbed on the frame or wheelset, and the grating type displacement sensor 40 is fixed on the grating scale installation frame 37. When the frame of the bogie and the wheelset have relative displacement, the magnetic meter base 38 adsorbed on the frame or wheelset together with the measurement The plate 39 then moves relative to the grating ruler mounting frame 37, so that the grating displacement sensor 40 generates displacement signals required for measurement. The change of the resistance strain gauge resistance value of the grating displacement sensor 40 is converted into a variable voltage output through the electric bridge, the signal is conditioned by the amplifier circuit, and sent to the computer through A/D conversion by the computer interface circuit.

Referring to Fig. 28, 29, 30, the control system includes a hydraulic control system, an electrical control system and a computer system.

The hydraulic control system includes quantitative pumps, servo valves, servo amplifiers and other control components, and adopts electro-hydraulic servo closed-loop force feedback control. The oil source of the system is a motor combined pump, and its working pressure and unloading are set by electromagnetic overflow valves. and control. The pressure is displayed by the pressure gauge. The actuator of the system is a hydraulic cylinder. Through the control of the electro-hydraulic servo valve, the piston of the hydraulic cylinder moves in the required direction and drives the bogie to move, and exerts the set force. The servo valve adopts a two-stage electro-hydraulic servo valve, and a fine filter with pollution indication is installed in front of each servo valve. The system is also equipped with auxiliary components including a liquid level gauge, a temperature regulator, an oil suction and return filter, and an accumulator. The hydraulic system and the microcomputer control system perform closed-loop feedback control on the test bench. The main control machine of the hydraulic control system is an industrial control machine, which monitors and controls the test system through a data acquisition card, and the action instructions of the detection table are issued by the industrial control machine, which enters the servo valve amplifier through the D/A interface for signal amplification, and outputs current signals. According to the motion frequency and amplitude set by the software, the piston of the hydraulic cylinder is reciprocatingly loaded according to the required direction and the set force, and the hydraulic cylinder drives the wheel set of the bogie to move at the same time. The displacement sensor measures force and displacement, and the detected displacement signal and force signal enter the A/D of the data acquisition card respectively after conditioning. The bogie needs to simulate the force state of the rail vehicle in motion according to a certain form of force spectrum. The input to the bogie force is given by the valve-controlled hydraulic cylinder, so the valve-controlled hydraulic cylinder actually outputs a certain form of force. The force spectrum is used to load the bogie, and the computer obtains the required bogie characteristic curve through data processing; the electrical control system is mainly composed of hardware, software and safety protection devices. Hardware includes: A/D, D/A acquisition card, I/O interface card, industrial control machine, control cabinet, regulated power supply, servo control unit, task management unit, signal conditioner, with external command signal input and feedback signal External output port. The software includes: system management, control management, servo control, vibration control, fault diagnosis, fault handling, with the functions of selection of different bogie test procedures, automatic collection and storage of measurement results and real-time display of results. According to the load, amplitude, frequency and other requirements required by the test, the user can make corresponding settings and control the action of the servo valve to meet the loading requirements. The control system has the coordinated loading capability of 8 actuator linkages, and can also control each actuator individually. Various types of monotonic loading and periodic loading can be set to achieve signal reproduction of a given frequency, waveform, and amplitude. The safety protection device in the control system has an alarm and automatic shutdown function for the (displacement and force) overload and accidental cracking of the test piece during the test.

Claims (13)

1. A closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system, mainly composed of a mechanical system, a test system and a control system, characterized in that the mechanical system includes: a vehicle body longitudinal thrust seat assembly (II), a closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic testing platform (III), two hoisted upper beam pillars (V), of which two hoisted upper beam pillars (V) are fixed on the closed-loop inclined On one side of the dynamic detection platform (III) for the stiffness parameters of the strut rail vehicle bogie, the body longitudinal thrust seat assembly (II) is fixedly arranged at the front end of the dynamic detection platform (III) for the stiffness parameters of the closed-loop diagonally braced rail vehicle bogie; The test system includes twelve displacement detection systems (G) and four six-dimensional force sensors (c), among which the twelve displacement detection systems (G) are respectively arranged on the two sides of the simulated vibration beam (F) of the bogie (E). four six-dimensional force sensors (c) are respectively arranged under the four wheels of the bogie (E), and are connected to the four wheels respectively The positioning and clamping system (e) is fixedly connected; the control system is mainly composed of a hydraulic control system, an electrical control system and a computer system, and is centrally arranged in the computer control room (IV), and the computer control room (IV) is fixed in a closed loop One side of the dynamic testing platform (III) for the stiffness parameter of the bogie of a diagonally braced rail vehicle. 2. the closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, is characterized in that, the described closed loop spline type rail vehicle bogie stiffness parameter dynamic detection platform (III) is mainly composed of closed loop spline The braced vertical loading gantry (A), plane loading platform (B), adjustable gauge bridge approach device (C), bogie longitudinal thrust assembly (D) and simulated corbel (F), the closed-loop The diagonally braced vertical loading gantry (A) is fixedly connected to the reference platform (a) of the plane loading platform (B), and the two adjustable gauge bridge approach devices (C) are fixed to the reference platform of the plane loading platform (B) by bolts In (a), each bogie longitudinal thrust assembly (D) is fixedly connected to the reference platform (a) through multiple longitudinal thrust seat bolts (9), simulating the floating of the bolster (F) and the bogie (E) Connection, the reference platform (a) of the plane loading platform (B) is fixed on the civil foundation (I) through the ground anchor (4). 3. The closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 2, characterized in that, the plane loading platform (B) comprises: reference platform (a), transverse oil cylinder assembly (b ), the longitudinal oil cylinder assembly (f) and the wheel set positioning clamping device (e), wherein the reference platform (a) is connected together by bolts of multiple cast iron platforms, and is connected by multiple ground anchors (4) Fixed on the civil foundation (I), two horizontal oil cylinder assemblies (b) and four longitudinal oil cylinder assemblies (f) are fixedly connected to the reference platform (a) by hexagon socket screws, and two small platforms (d) adopt two-way The rolling slideway is connected with the reference platform (a) by sliding fit, two six-dimensional force sensors (c) are fixed on each small platform (d), and the plate groove guide rail (21) of the wheel set positioning and clamping device (e) passes through The screw mode is fixedly connected with the six-dimensional force sensor (c). 4. The closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 3, characterized in that, said transverse oil cylinder assembly (b) comprises: oil cylinder guide rail lead screw (24), spoke force Sensor (26), transverse oil cylinder support seat (32) and transverse oil cylinder (34), wherein the tail end of transverse oil cylinder (34) is fixedly connected with transverse oil cylinder extension pipe (35), and the front end of transverse oil cylinder extension pipe (35) The shaft hole is coaxially connected with the small platform central hole (42) of the small platform (d), and the front end of the transverse oil cylinder (34) is coaxially fixedly connected with a spoke-type force sensor (26), and the spoke-type force sensor (26) and the transverse oil cylinder The supporting seat (32) is hinged, and the horizontal oil cylinder supporting seat (32) is slidably connected with the horizontal oil cylinder guide rail seat (36). The female (30) is threaded and connected, and the other end is coaxially connected with the through hole of the horizontal oil cylinder guide rail screw support seat (33) fixed on the horizontal oil cylinder guide rail seat (36), and the horizontal oil cylinder guide rail seat (36) is fixed on the reference platform On (a), the transverse oil cylinder (34) is independently controlled by a servo valve. 5. The closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 3, characterized in that, the longitudinal oil cylinder assembly (f) comprises: oil cylinder guide rail screw (24), longitudinal oil cylinder ( 25), the spoke type force sensor (26) and the longitudinal oil cylinder support seat (31), wherein one end of the oil cylinder guide rail screw (24) is threaded with the screw nut (30) fixed on the longitudinal oil cylinder support seat (31) Connect, the other end is coaxially connected with the through hole of the longitudinal oil cylinder guide rail lead screw support seat (28) fixed on the longitudinal oil cylinder guide rail seat (29); the tail end of the longitudinal oil cylinder (25) is fixedly connected with a longitudinal oil cylinder extension pipe ( 23), the longitudinal oil cylinder extension pipe (23) is hinged with the longitudinal oil cylinder support seat (31), the longitudinal oil cylinder support seat (31) is connected with the longitudinal oil cylinder guide rail seat (29) by sliding fit, the front end of the longitudinal oil cylinder (25) is connected with the spoke type The force sensor (26) is coaxially fixedly connected, the spoke force sensor (26) is hinged with the small platform longitudinal thrust box (27) fixed on the small platform (d), and the longitudinal oil cylinder (25) is independently controlled by a servo valve. 6. The closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 3, characterized in that, the wheel pair positioning and clamping system (e) includes: two internal clamps for fixing each wheel type wheel chock (18), plate groove guide rail (21) and wheel elbow fixture (20), and the two inner clip type wheel chocks (18) are connected as a whole by adjusting screw rod (19), and are connected with the plate groove The guide rail (21) is slidingly fitted and connected, and the wheel elbow fixture (20) is fixedly connected with the plate groove guide rail (21) by bolts. 7. The dynamic detection system for the stiffness parameter of the closed-loop sprag type rail vehicle bogie according to claim 2, wherein the adjustable gauge bridge approach device (C) can be adjusted according to bogies of different gauges, The movable track groove (6) is installed on the wheel bridge (5), and is combined into a slidingly connected whole, and the position of the movable track groove (6) can be adjusted by adjusting the bridge leading screw (7). 8. The closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, characterized in that, each of the bogie longitudinal thrust seat assemblies (D) includes: T70 thrust screw (8) Bogie longitudinal thrust beam (10) and longitudinal thrust seat (11), wherein the T70 thrust screw (8) is connected with the bogie longitudinal thrust beam (10) by sliding fit, and the bogie longitudinal thrust The beam (10) is fixed on the longitudinal thrust seat (11), and the longitudinal thrust seat (11) is fixed on the reference platform (a). 9. The closed-loop diagonally braced rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, characterized in that, each of the hoisting-type upper beam pillars (V) comprises: hoisting-type upper beam pillars (12) And some pillar anchor bolts (13), the hoisting type upper beam pillar (12) is fixedly connected with the civil engineering foundation (1) by pillar anchor bolts (13). 10. The closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, characterized in that, the longitudinal thrust seat assembly (II) of the vehicle body comprises: a vehicle body connecting rod (14), a stop Push seat base plate (15), vehicle body fixed support (16) and several thrust seat anchor bolts (17), wherein the body connecting rod (14) is fixedly connected on the vehicle body fixed support (16), and the vehicle body fixed support Seat (16) is slidably connected with the thrust base base plate (15), and the thrust base base plate (15) is fixedly connected on the civil foundation (1). 11. The closed-loop sprag type rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, characterized in that, the bogie displacement measurement system (G) comprises: frame grating type displacement sensor (40), Measuring plate (39), magnetic gauge base (38) and grating ruler mounting frame (37), wherein the magnetic gauge base (38) installed on one side of the measuring plate (39) is adsorbed on the frame or wheelset, and the grating type displacement sensor (40) is fixed on the grating ruler installation frame (37), the change of the resistance strain gauge resistance value of sensor is converted into the voltage output of change by electric bridge, carries out signal conditioning by amplifying circuit, carries out A/D conversion through computer interface circuit and sent to the computer for processing. 12. The closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, characterized in that, the hydraulic control system includes: the control of quantitative pumps, servo valves and servo amplifier control elements, and includes : Force, displacement and switch value sensors, controllers and transmitters, the main control machine is an industrial control machine, and the hydraulic system is measured and controlled through a data acquisition card. The action instructions of the detection table are issued by the industrial control machine through the D/A interface Enter the servo valve amplifier to amplify the signal and output the current signal. According to the motion frequency and amplitude set by the software, the piston of the hydraulic cylinder is reciprocatingly loaded according to the required direction and the set force. The hydraulic cylinder drives the bogie while stretching. wheelset for exercise. 13. The closed-loop sprag-braced rail vehicle bogie stiffness parameter dynamic detection system according to claim 1, wherein the electrical control system is mainly composed of hardware, software and safety protection devices, and the hardware includes: A/D , D/A acquisition card, I/O interface card, industrial control machine, control cabinet, regulated power supply, servo control unit and signal conditioner, and external signal output port with external command signal input and feedback; software includes: system management, control management, servo control, vibration control, fault diagnosis and fault handling, with the functions of selection of different bogie test procedures, automatic collection and storage of measurement results and real-time display of results; According to the frequency requirements, make corresponding settings and control the action of the servo valve to meet the loading requirements; the control system has the coordinated loading capability of 8 actuator linkages, and can also control each actuator individually, and set various types of monotonic loading , Periodic loading, realizing signal reproduction of given frequency, waveform, and amplitude; the safety protection device in the electrical control system has an alarm and automatic shutdown function for displacement and force overload during the test process, and accidental cracking of the tested bogie.

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