WO2014082364A1

WO2014082364A1 - Rotation feature test system of bogie of rail vehicle

Info

Publication number: WO2014082364A1
Application number: PCT/CN2012/087620
Authority: WO
Inventors: 谭富星; 王金田; 王秀刚; 苏建; 刘洪涛; 郭雷; 安长财; 张克英; 张鹏; 刘彦彤
Original assignee: 长春轨道客车股份有限公司
Priority date: 2012-11-27
Filing date: 2012-12-27
Publication date: 2014-06-05
Also published as: CN103018057B; CN103018057A

Abstract

A rotation feature test system of a bogie of a rail vehicle is mainly formed by a test platform (A), longitudinal actuators (B), perpendicular actuators (C), a center shaft, and transverse positioning assembly (D). The test platform (A) is in a cuboid structure, and in a longitudinal direction, the test platform (A) is connected to two longitudinal actuators (B) and performs rotational motion by staggered expansion and retraction of the two longitudinal actuators (B). Four perpendicular actuators (C) support the test platform (A), upper ends are fixedly connected on a lower plane of the test platform (A), and lower parts are fixed on the test platform (A). The four perpendicular actuators (C) provide perpendicular support of the test platform (A) and provide motion compensation of the test platform (A) in a process of rotational motion. The center shaft and the transverse positioning assembly (D) are fixed on a base platform, and an upper part is connected to the test platform (A) by using a positioning shaft (e), so as to implement lateral positioning of the test platform (A). The test system implements measurement of a large rotation angle, and the rotation angle can reach +/-8 degrees. Wheel set positioning mechanisms provide positioning constraint of the bogie in a perpendicular direction, a transverse direction, and a longitudinal direction, thereby providing conditions for a rotation test. The center shaft and the transverse positioning assembly (D) provide transverse constraint positioning and a rotation center for the rotation platform (a).

Description

Rail vehicle bogie rotation characteristic test system

Technical field

The invention relates to a field vehicle detecting device, in particular to a rail vehicle bogie rotation characteristic testing system.

Background technique

With the development trend of high-speed and heavy-duty vehicles, the running performance of vehicles is receiving more and more attention. The performance parameters of bogies affect the running quality of vehicles, which directly determines the dynamic performance and operational safety of vehicles. And driving stability. The value of the rotary resistance torque affects the dynamic performance of the bogie. The selection of the rotary resistance torque should ensure that the vehicle has sufficient anti-snake stability and good curve passing ability. Therefore, it is determined that the bogie rotation resistance torque is the bogie. The key to design and optimization.

At present, there is no special test bench for the test of the rotating characteristics of the bogie of the rail vehicle, which is mainly carried out on the test bench of the bogie parameter. Southwest Jiaotong University patent, patent name: rail vehicle bogie test bench; patent number: ZL200610022671.3 The patent discloses a bogie parameter measurement test bench, which adopts a floating support with a steel ball as a core and provides a rotary center of the test bench, and two actuators in the lateral direction of the test bench are staggered and telescopically moved to push the test platform. Rotating motion to achieve the purpose of bogie rotation characteristics test. However, the telescopic stroke of the test bench actuator can only measure the small-angle rotary motion, which is difficult to realize for the large-angle rotary motion, thereby reducing the accuracy of the test and the true rotation of the vehicle. ( 2) Patent of Jilin University, patent name: four-column rail vehicle bogie stiffness test system; patent number: ZL200810050261.9 The patent discloses a four-column rail vehicle bogie stiffness test system, and proposes a bogie parameter test method. When the bogie rotation characteristic test is performed, the two longitudinal actuator cylinder pairs are passed according to the upper and lower superimposed pressure plate structures in the test system. The reverse telescopic force of the upper pressing plate drives the lower pressing plate to rotate, and the lower pressing plate directly applies force to the bogie to realize the testing of the rotating motion. However, this method is complicated in operation, and the method of applying force to the bogie by the friction pair cannot accurately measure the rotation characteristics of the bogie, and the test precision is low.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a test system for the bogie characteristics of a bogie of a railway vehicle, and to develop a test platform for the bogie characteristics of the bogie. The central axis and the lateral positioning assembly are used to realize the positioning of the platform in the lateral direction, and the test bench is provided. Rotating the center to achieve accurate measurement of the turning characteristics of the finished vehicle and the completion of the bogie, providing a basis for the evaluation of vehicle performance.

To achieve the above object, the present invention provides a railway vehicle bogie rotation characteristic testing system, which is characterized in that: mainly consists of a test platform, a longitudinal actuator, a vertical actuator, a central axis and a lateral positioning assembly, and the characteristics thereof are The test platform is a rectangular parallelepiped structure connected to the two longitudinal actuators in the longitudinal direction, and is rotated by the staggered expansion and contraction of the two longitudinal actuators; the four vertical actuators support the test platform, and the upper ends are fixedly connected thereto. On the lower plane of the test platform, the lower part is fixed on the basis of the test platform, and four vertical actuators provide the vertical support of the test platform and provide compensation for the motion of the test platform during the rotary motion; the central axis and the lateral positioning assembly It is fixed on the base platform, and the upper part is connected with the test platform through the positioning shaft to realize the lateral positioning of the test platform. The test platform is released in the longitudinal direction, and the longitudinal freedom is not restricted.

The test platform is mainly composed of a rotary platform, a wheelset stop assembly, a wheelset clamping mechanism assembly and a transition rail assembly. The rotary platform is a rectangular parallelepiped structure and a welded part, and the upper surface is processed with several T Type mounting groove provides mounting platform for wheelset stop assembly, wheelset clamping mechanism assembly and transition rail assembly, and T The opening of the groove is adapted to the detection of vehicles with different wheelbases and gauges, and the slewing platform is the bearing mechanism of the entire test rig, which is an important component of the completion of the vehicle slewing test; the lower end face has a central hole and 8 Threaded holes arranged in a circle for mounting with the central axis and the central axis of the lateral positioning assembly.

The wheelset stops are always four sets, the structure is the same, and the installation position is symmetric about the center of the rotary platform, and passes through the T T-bolt fixed on the rotary platform In the shape of the installation groove, the stop action of the wheel pair is realized during the test, both of which are composed of the wheel block, the wheel track and the wheel block, and the lower end support of the wheel block is fixed on the wheel block, the upper end block The rounded portion of the block is placed on the tread of the wheel pair to provide a longitudinal thrust of the wheel pair; the wheel track is fixed in a groove in the surface of the wheel block to provide a track for loading the bogie during testing; The wheel block is hollow and has a section of 'work' shape, which is fixed on the rotary platform. In the T-shaped mounting groove, the four wheel stop mechanisms provided on the swing platform realize the longitudinal positioning of the bogie.

The wheel pair clamping mechanism is always four sets, the structure is the same, the installation position is symmetric about the center of the rotary platform, and is fixed in the installation threaded hole provided on the upper surface of the rotary platform, and the fixing of the wheel pair clamping mechanism can be adjusted at the same time. Position to accommodate wheel sets of different track, both by ' L 'shaped inclined iron, carrying track strip and wheel set clamping support, said wheel set clamping support fixed on the rotary platform T In the groove, the bearing rail strip and the wheelset clamping bearing are connected by bolts, and after the vehicle to be tested is stopped on the carrying rail strip, the 'L' 'The oblique iron is pressed into the wheel between the outer side and the wheel pair clamping support, and the wheel pair realizes the horizontal positioning and clamping, and the friction between the three forces exerts a certain binding force on the longitudinal and vertical direction of the wheel pair. .

The transition track assembly is mainly composed of a transition rail and a rail press block. The transition rail is a standard rail, and is fixedly mounted on the swing platform by a plurality of rail clamps, thereby providing a smooth guiding of the tested vehicle to the test bench. Conditions, and the upper ends of the transition rails are coplanarly mounted on the upper surface of the load rail strips in the wheelset clamping mechanism assembly, so that the bogie is smoothly pushed to the test bench; the rail clamps are fixedly mounted on the rails Slewing platform In the T-slot, the transition rail is compressed.

The longitudinal actuator and the vertical actuator are the electro-hydraulic servo system of the test bench, and the two longitudinal actuators, the lower ball joint points of each actuator are fixed by the fastening bolts in the test. On the basis of the platform, the upper ball joint is connected to the longitudinal end face of the rotary platform by bolts, and the two longitudinal actuators provide longitudinal support for the rotary characteristic test platform, and the two longitudinal actuators are staggered and telescopically moved to realize the test platform around the center of rotation. Rotational motion, the angle of rotation is ± 8 °; four vertical actuators support the test platform, the upper end ball joint is fixedly connected to the lower plane of the test platform, the lower ball joint is fixed on the test platform, and the four vertical actuators provide the test platform. Vertical support and compensation for the motion of the test platform during the swing motion.

The central shaft and the lateral positioning assembly are mainly composed of a central shaft and a positioning device, and the central shaft is fixedly connected to the rotary platform through a small shaft and a bolt at one end thereof; The other end of the lateral positioning assembly passes through the positioning square pier The T-bolt is attached to the base platform to provide vertical support for the swing platform.

The central axis is a stepped structure, and one end of the shaft is a thin shaft, which is used as a positioning shaft when mounted on the rotary platform, and the flange close to the thin shaft end is fixedly connected with the rotary platform by bolts; the axis of the other end is the thick shaft The end is the rotary shaft of the test platform and is coaxially mounted with the slider in the positioning device to provide a rotation center when the test platform is used for the rotary motion.

The positioning device is mainly composed of a lateral restraining device and a positioning square pier.

The lateral restraint device is mainly composed of a lateral positioning baffle, a slider stop and a slider. The lateral positioning baffle is two sets, the structure is the same, and the positioning square pier is bolted to provide lateral constraint of the slider. The slider stop is fixed at two ends of the lateral positioning baffle, and the slider is matched and installed in a channel formed by two sets of lateral positioning baffles, the structure is fixedly constrained in the lateral direction, and the degree of freedom in the longitudinal direction is released. Preventing the two longitudinal actuators of the test platform from being pushed and pulled in the same direction to cut the rotary shaft due to the control misalignment of the electro-hydraulic servo system; the slider is a rectangular parallelepiped structure with a through hole in the middle to provide lateral binding force for the rotary platform And the center of rotation of the swing motion.

The beneficial effects of the present invention are as follows:

1 The rail vehicle bogie rotation characteristic test system according to the present invention discloses a method for measuring the rotation characteristic, and can realize the measurement of the large rotation angle, and the rotation angle can reach ± 8 °.

2 The rail vehicle bogie rotation characteristic test system according to the present invention develops a wheel alignment mechanism, which provides vertical, lateral and longitudinal positioning constraints of the bogie, and provides conditions for the swing test.

3 The rail vehicle bogie rotation characteristic test system of the present invention develops a central shaft and a lateral positioning assembly, and provides a lateral constrained positioning and a swing center for the swing platform.

DRAWINGS

1 is a perspective view showing the test of the bogie of the railway vehicle bogie rotation characteristic test system according to the present invention;

2 is an exploded view showing the structure of a railway vehicle bogie rotation characteristic test system according to the present invention;

Figure 3 is a perspective view of the rotary platform of the present invention;

Figure 4 is a cross-sectional view of the slewing platform of the present invention;

Figure 5 is a perspective view of the axle assembly assembly of the present invention;

Figure 6 is an exploded view of the wheel block mechanism assembly of the present invention;

Figure 7 is a perspective view of the wheelset clamping mechanism assembly of the present invention;

Figure 8-a is a perspective view of the axial alignment of the wheel-clamping mechanism assembly clamping wheel pair according to the present invention;

Figure 8-b is a front view showing the state of the pair of clamping wheel assembly of the wheelset clamping mechanism assembly according to the present invention;

Figure 9 is a perspective view of the transitional track assembly of the present invention;

Figure 10 is a central axis and lateral positioning assembly according to the present invention

Figure 11 is a schematic view of the central axis of the present invention;

Figure 12-a is an isometric projection view of the central axis of the present invention;

Figure 12-b is a cross-sectional view of the central axis in the axial direction of the present invention;

Figure 13 is a perspective view of the positioning device of the present invention;

Figure 14 is a perspective projection view of the lateral restraint device of the present invention;

Figure 15 is an isometric projection view of the positioning square pier of the present invention;

16 is a schematic view showing the working process of the steering characteristic test system of the rail vehicle bogie according to the present invention;

In the figure: Ι. Test bogie, II. Rotating characteristic test system for railway vehicle bogie, = 3 \* ROMAN III . Base platform; A. Test platform, B. Longitudinal actuator, C. Vertical actuator, D central axis and lateral positioning assembly;

a. slewing platform, b. wheelset stop assembly, c. wheelset clamping mechanism assembly, d. transition track assembly, e. center shaft, f. Positioning means;

1. Wheel block, 2. Wheel track 3. Wheel block 4. L-shaped slanting iron, 5. Carrying track strip, 6. Wheelset clamping support, 7. Wheelset, 8. Transition track 9. Track clamp 10. Lateral restraint 11. Positioning square pier 12. Lateral positioning baffle 13. Slider stop 14. Slider.

detailed description

Referring to Figure 1-2, the test system for the rotation characteristics of the bogie of the railway vehicle according to the present invention is mainly composed of the test platform A and the longitudinal actuator B. The vertical actuator C, the central shaft and the lateral positioning assembly D are characterized in that the test platform A is a rectangular parallelepiped structure and is longitudinally oriented with two longitudinal actuators B Bolting is carried out by means of the staggered expansion and contraction of the two longitudinal actuators B; wherein four vertical actuators C propel the test platform A and the upper end hinges are bolted to the test platform A On the lower plane, the lower hinge is fixed on the test bench, and the four vertical actuators C provide the vertical support of the test platform A and provide compensation for the platform motion during the rotary motion; the central axis and the lateral positioning assembly D pass The T-bolt is fixed in the T-shaped mounting groove of the base platform = 3 \* ROMAN III, while the upper part passes the positioning axis e and the test platform A The joint realizes the lateral positioning of the test bench, and the test platform A is released in the longitudinal direction, and the longitudinal freedom is not restricted.

The longitudinal actuator B and the vertical actuator C are electro-hydraulic servo systems of the test bench, and the two longitudinal actuators B Composition, the lower hinge point of each actuator is fixed on the test bench base by fastening bolts, and the upper hinge point passes through the bolt and the rotary platform. The longitudinal end faces are bolted together, and the two longitudinal actuators provide longitudinal support for the rotary characteristic test rig. At the same time, the two longitudinal actuators are staggered and telescopically moved to realize the rotary motion of the test rig around the center of rotation, and the rotation angle can reach ± 8 °; four vertical actuators C support the test platform A, the upper end hinge is bolted to the lower plane of the test platform A, the lower hinge is fixed on the test bench, four vertical actuators C Provides vertical support for the test platform A and provides compensation for platform motion during the swing motion.

The test platform A is mainly composed of a rotary platform a, a wheelset stop assembly b, a wheelset clamping mechanism assembly c and a transition track assembly d Composition.

Referring to Figure 3-4, the rotary platform a is a rectangular parallelepiped structure, welded parts, and a plurality of T-shaped mounting grooves are formed on the upper surface, which is a wheel pair stop assembly. b. The wheelset clamping mechanism assembly c and the transition rail assembly d provide a mounting platform, and the T-slot is opened to accommodate the detection of vehicles with different wheelbases and gauges, and the rotary platform a The bearing mechanism of the whole test bench is an important component of the completion of the vehicle rotation test; the lower end surface has a central hole and eight circumferentially arranged threaded holes for mounting with the central axis and the lateral positioning assembly D central axis e.

Referring to Figure 5-6, the wheelset stop assembly b is four sets, the structure is the same, and its installation position is about the rotary platform. The center is symmetrical and is fixed in the T-shaped mounting groove on the swivel platform a by T-bolts to achieve the stop of the wheel pair during the test. Both have wheel blocks 1 , wheel rail 2 and wheel block 3 The lower end support of the wheel block 1 is fixed on the wheel block 3 by bolts, and the rounded portion of the upper end is placed on the tread surface of the wheel pair to provide a longitudinal thrust of the wheel pair; Track 2 It is fixed in the groove on the surface of the wheel block 3 by two bolts to provide the track for loading the bogie during the test; the wheel block 3 is a hollow structure with a 'work' shape through the bolt Fixed on the rotary platform a In the upper T-shaped mounting groove, the four wheel-stop mechanisms provided on the swivel platform a realize the longitudinal positioning of the bogie.

Referring to Figure 7-8, the wheelset clamping mechanism assembly c is four sets, the structure is the same, and its installation position is about the rotary platform. The center is symmetrical and is bolted to the mounting threaded hole provided on the upper surface of the swivel platform a. At the same time, the fixed position of the wheel pair clamping mechanism can be adjusted to accommodate wheel pairs of different track heights. Both are made of 'L' shaped oblique iron 4 The carrier rail strip 5 and the wheelset clamping bracket 6 are formed, and the wheelset clamping bracket 6 is fixed by bolts in the T-shaped groove of the rotary platform a, and carries the rail strip 5 and the wheelset clamping support 6 After bolting, the vehicle under test is stopped on the load rail strip 5, and the 'L'-shaped inclined iron 4 is pressed into the wheel pair 7 outer side and the wheel pair clamping support 6 Between the two, the wheel pair is positioned and clamped horizontally, and the friction between the three forces exerts a certain binding force on the longitudinal and vertical directions of the wheel pair.

Referring to Figure 9, the transition rail assembly d is mainly composed of a transition rail 8 and a rail clamp 9, which is a transition rail 8 It is a standard type of rail, which is fixedly mounted on the rotary platform a through a plurality of rail clamps 9 to provide conditions for the test vehicle to be smoothly guided to the test bench, and the track top and the wheelset clamping mechanism assembly at both ends of the transition rail 8 c The upper plane of the carrier rail strip 5 is installed in a coplanar manner to smoothly push the bogie to the test rig; the rail clamp 9 is fixedly mounted in the T-slot of the slewing platform a by T-bolts, and the compression transition track 8 .

Referring to Figures 10-15, the central axis and lateral positioning assembly D is mainly composed of a central axis e and a positioning device f, the central axis e is fixed by the small shaft and bolt at one end of the fixed platform a; the other end of the central shaft and the lateral positioning assembly D is fixed to the base platform by the T-bolt via the positioning square pier 11 = 3 \* On the ROMAN III, the vertical support of the swivel platform a is provided.

The central axis e is a stepped structure, and one end of the shaft is thin, as a rotary platform a The positioning shaft is installed, and the flange near the thin shaft end is fixedly connected with the rotary platform a by bolts; the thicker shaft end at the other end is the rotary shaft of the test bench and the slider in the positioning device f 14 Coaxial mounting provides the center of rotation of the test rig for rotary motion.

The positioning device f is mainly composed of a lateral restraining device 10 and a positioning square pier 11.

The lateral restraint device 10 is mainly composed of a lateral positioning baffle 12, a slider stop 13 and a slider 14 The two lateral positioning baffles 12 are of the same structure and are bolted to the positioning square pier 11 to provide lateral restraint of the slider 14; the slider stop 13 is fixed to the lateral positioning baffle by bolts. At both ends of 12, the slider 14 is fitted to two sets of lateral positioning baffles 12 In the channel formed, the structure is fixedly constrained in the lateral direction, and the degree of freedom in the longitudinal direction is released to prevent the two longitudinal actuators of the test bench from being pushed and pulled in the same direction to cut the rotary shaft due to the control misalignment of the electro-hydraulic servo system; Slider 14 For the rectangular parallelepiped structure, a through hole is opened in the middle to provide a lateral binding force and a rotational center of the rotary motion for the rotary platform a.

See Figure 16 The schematic diagram of the working principle of the rotary characteristic test system for the bogie of the railway vehicle according to the present invention. First, establish the coordinate system of the test bench, with the direction of travel of the train as the X axis, the direction of lateral movement as the Y axis, and the vertical direction as Z. Axis. In Figure 16, the four vertical actuators of the test platform provide vertical support for the vehicle on board; two longitudinal actuators are staggered with a phase difference of 180 °, and the displacement control of the actuator to realize the rotary motion of the test platform, can simulate different rotation speeds, and realize the rotation test of the air spring out of gas, normal air pressure and overcharge state. The test can complete the measurement of the steering characteristics of the bogie in the state of completion of the whole vehicle, and can realize the measurement of the rotation characteristics of the bogie and the simulated vehicle weight.

Before the test, the rotation characteristics of the rotary characteristic test system of the rail vehicle bogie according to the present invention are calibrated to determine the relationship between the rotation characteristics of the test platform itself and the swing angle, that is, the rotation characteristic curve of the test platform is obtained; during the test Through the data acquisition system, the force of the actuator feedback and the displacement value of the two longitudinal actuators during the rotary motion are continuously recorded, and then the data processing is performed to obtain the overall rotation characteristic curve of the vehicle and the test platform, and the test bench The calibration curve is used to obtain the rotation characteristic curve of the vehicle or the bogie, and the rotation resistance coefficient of the bogie can also be determined to evaluate the vehicle.

Claims

The utility model relates to a railway vehicle bogie rotation characteristic testing system, which is mainly composed of a test platform, a longitudinal actuator, a vertical actuator, a central axis and a lateral positioning assembly, wherein the test platform is The rectangular parallelepiped structure is connected to the two longitudinal actuators in the longitudinal direction, and is rotated by the staggered expansion and contraction of the two longitudinal actuators; the four vertical actuators support the test platform, the upper end of which is fixedly connected to the lower plane of the test platform, and the lower part Fixed on the test platform, four vertical actuators provide vertical support of the test platform and provide compensation for the motion of the test platform during the swing motion; the central axis and the lateral positioning assembly are fixed on the base platform, and the upper part passes The positioning shaft is connected with the test platform to realize the lateral positioning of the test platform.
According to claim 1 The rail vehicle bogie rotation characteristic testing system is characterized in that: the test platform is mainly composed of a rotary platform, a wheelset stop assembly, a wheelset clamping mechanism assembly and a transition rail assembly, The slewing platform is a rectangular parallelepiped structure and welded parts, and several upper surfaces are processed. T-mounting groove provides mounting platform for wheelset stop assembly, wheelset clamping mechanism assembly and transition rail assembly, and T The opening of the groove is adapted to the detection of vehicles with different wheelbases and gauges, and the slewing platform is the bearing mechanism of the entire test rig, which is an important component of the completion of the vehicle slewing test; the lower end face has a central hole and 8 Threaded holes arranged circumferentially for mounting with the central axis and the central axis of the lateral positioning assembly;

The wheelset stops are always four sets, the structure is the same, and the installation position is symmetric about the center of the rotary platform, and is fixed on the rotary platform by T-bolts. In the shape of the installation groove, the stop action of the wheel pair is realized during the test, both of which are composed of the wheel block, the wheel track and the wheel block, and the lower end support of the wheel block is fixed on the wheel block, the upper end block The rounded portion of the block is placed on the tread of the wheel pair to provide a longitudinal thrust of the wheel pair; the wheel track is fixed in a groove in the surface of the wheel block to provide a track for loading the bogie during testing; The wheel block is hollow and has a section of 'work' shape, which is fixed on the rotary platform. In the T-shaped mounting groove, the four wheel stop mechanisms provided on the rotary platform realize the longitudinal positioning of the bogie;

The wheel pair clamping mechanism is always four sets, the structure is the same, the installation position is symmetric about the center of the rotary platform, and is fixed in the installation threaded hole provided on the upper surface of the rotary platform, and the fixing of the wheel pair clamping mechanism can be adjusted at the same time. Position to accommodate wheel sets of different track, both by ' L 'shaped inclined iron, carrying track strip and wheel set clamping support, said wheel set clamping support fixed on the rotary platform T In the groove, the bearing rail strip and the wheelset clamping bearing are connected by bolts, and after the vehicle to be tested is stopped on the carrying rail strip, the 'L' 'The oblique iron is pressed into the wheel between the outer side and the wheel pair clamping support, and the wheel pair realizes the horizontal positioning and clamping, and the friction between the three forces exerts a certain binding force on the longitudinal and vertical direction of the wheel pair. ;

The transition track assembly is mainly composed of a transition rail and a rail press block. The transition rail is a standard rail, and is fixedly mounted on the swing platform by a plurality of rail clamps, thereby providing a smooth guiding of the tested vehicle to the test bench. Conditions, and the upper ends of the transition rails are coplanarly mounted on the upper surface of the load rail strips in the wheelset clamping mechanism assembly, so that the bogie is smoothly pushed to the test bench; the rail clamps are fixedly mounted on the rails Slewing platform In the T-slot, the transition rail is compressed.
According to claim 1 The rail vehicle bogie rotation characteristic testing system is characterized in that: the longitudinal actuator and the vertical actuator are electro-hydraulic servo systems of the test bench, and the two longitudinal actuators each The lower ball joint points of the actuators are fixed on the test platform foundation by fastening bolts, and the upper ball joint points are connected with the longitudinal end faces of the rotary platform through bolts, and the two longitudinal actuators provide longitudinal support for the rotary characteristic test platform. The two longitudinal actuators are staggered and telescopic to realize the rotary motion of the test platform around the center of rotation, and the angle of rotation is ± 8 °; four vertical actuators support the test platform, the upper end ball joint is fixedly connected to the lower plane of the test platform, the lower ball joint is fixed on the test platform, and the four vertical actuators provide the test platform. Vertical support and compensation for the motion of the test platform during the swing motion.
According to claim 1 The rail vehicle bogie rotation characteristic testing system is characterized in that: the central shaft and the lateral positioning assembly are mainly composed of a central shaft and a positioning device, and the central shaft is realized by a small shaft and a bolt at one end thereof. The solidification of the slewing platform is integrated; the other end of the central shaft and the lateral positioning assembly passes through the positioning square pier The T-bolt is attached to the base platform to provide vertical support for the swing platform.
According to claim 4 The rail vehicle bogie rotation characteristic test system is characterized in that: the central shaft is a stepped structure, and one end shaft is a thin shaft, which is used as a positioning shaft when mounted on the rotary platform, and is close to the thin shaft by bolts. The flange of the end is fixedly connected with the rotary platform; the axial end of the thick shaft of the other end is the rotary shaft of the test platform, and is coaxially mounted with the slider in the positioning device, and provides the rotation center of the test platform for the rotary motion.
The positioning device is mainly composed of a lateral restraining device and a positioning square pier. The lateral restraining device is mainly composed of a lateral positioning baffle, a slider stop and a slider. The lateral positioning baffle is two sets, and the structure is Similarly, bolting with the positioning square pier provides lateral constraint of the slider; the slider stop is fixed at both ends of the lateral positioning baffle, and the slider is matched and installed in the channel formed by the two sets of lateral positioning baffles, The structure is fixedly constrained in the lateral direction, and the degree of freedom in the longitudinal direction is released to prevent the two longitudinal actuators of the test platform from being pulled in the same direction to cut the rotary shaft due to the control misalignment of the electro-hydraulic servo system; the slider is a rectangular parallelepiped The structure has a through hole in the middle to provide a lateral binding force and a rotation center of the rotary motion for the rotary platform.