CN113484047A - Calibration test bed for force measuring wheel set - Google Patents
Calibration test bed for force measuring wheel set Download PDFInfo
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- CN113484047A CN113484047A CN202110769077.5A CN202110769077A CN113484047A CN 113484047 A CN113484047 A CN 113484047A CN 202110769077 A CN202110769077 A CN 202110769077A CN 113484047 A CN113484047 A CN 113484047A
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Abstract
本申请实施例提供了一种测力轮对标定试验台，包括试验台基座平台和纵向测力系统，纵向测力系统安装在试验台基座平台之上；纵向测力系统包括纵向测力装置，纵向测力装置包括：纵向安装平台；纵向滑台，纵向滑台滑动连接在纵向安装平台之上且纵向滑台能够在纵向安装平台之上沿纵向方向滑动；垂向支撑组件，安装在纵向滑台之上，用于支撑测力轮对的车轮；三分力传感器，与垂向支撑组件固定；其中，三分力传感器用于在测力轮对的车轮承受预设的垂向载荷，且纵向滑台承受预设的纵向载荷时，获取三个方向的支反力。本申请实施例解决了传统的测力轮对标定试验台只能进行垂向方向的静态测力标定，或者横向方向的静态测力标定的技术问题。
The embodiment of the present application provides a force measuring wheelset calibration test bench, including a test bench base platform and a longitudinal force measuring system, the longitudinal force measuring system is installed on the test bench base platform; the longitudinal force measuring system includes a longitudinal force measuring system The device, the longitudinal force measuring device includes: a longitudinal installation platform; a longitudinal sliding table, the longitudinal sliding table is slidably connected on the longitudinal installation platform and the longitudinal sliding table can slide along the longitudinal direction on the longitudinal installation platform; the vertical support assembly is installed on the On the longitudinal sliding table, it is used to support the wheels of the force-measuring wheelset; the three-component force sensor is fixed with the vertical support assembly; wherein, the three-component force sensor is used to bear a preset vertical load on the wheels of the force-measuring wheelset , and when the longitudinal sliding table bears the preset longitudinal load, the support reaction forces in three directions are obtained. The embodiments of the present application solve the technical problem that the traditional force-measuring wheelset calibration test bench can only perform static force-measuring calibration in the vertical direction or static force-measuring calibration in the lateral direction.
Description
Technical Field
The application relates to the technical field of calibration of a force measuring wheel set, in particular to a force measuring wheel set calibration test bed.
Background
The force measuring wheel pair is a core sensing device in the dynamics test research of the rail vehicle, the performance of the force measuring wheel pair is good and bad, and the evaluation result of a tested object is directly influenced. The calibration test bed of the force-measuring wheel set is special equipment for calibrating the output characteristics of the force-measuring wheel set and testing various performance indexes of the force-measuring wheel set, and the calibration of the force-measuring wheel set is an important link in the research and application of the force-measuring wheel set.
With the rapid development of railways in China, the manufacturing technology of rolling stock is greatly improved, and higher requirements are put forward on the performance of the force measuring wheel pair. The prior calibration means of the force measuring wheel set, namely the adaptability of equipment, and the accuracy and integrity of the calibration result, can not meet the requirements of related scientific research activities. The development of more scientific and advanced force measuring wheel pair calibration equipment is increasingly urgent.
The traditional calibration test bed for the force measuring wheel set can only carry out static force measurement calibration in the vertical direction or static force measurement calibration in the transverse direction.
Therefore, the conventional calibration test bed for the force measuring wheel set can only perform static force measurement calibration in the vertical direction or static force measurement calibration in the transverse direction, which is a technical problem urgently needed to be solved by a person skilled in the art.
The above information disclosed in the background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not form the prior art that is known to those of ordinary skill in the art.
Disclosure of Invention
The embodiment of the application provides a force measuring wheel set calibration test bed to solve the technical problem that the conventional force measuring wheel set calibration test bed can only carry out static force measurement calibration in the vertical direction or static force measurement calibration in the transverse direction.
The embodiment of the application provides a calibration test bed for a force measuring wheel set, which comprises a test bed base platform and a longitudinal force measuring system, wherein the longitudinal force measuring system is arranged on the test bed base platform;
the longitudinal force measuring system comprises a longitudinal force measuring device, and the longitudinal force measuring device comprises:
longitudinally installing a platform;
the longitudinal sliding table is connected onto the longitudinal mounting platform in a sliding mode and can slide on the longitudinal mounting platform along the longitudinal direction;
the vertical supporting assembly is arranged above the longitudinal sliding table and is used for supporting wheels of the force measuring wheel pair;
the three-component force sensor is fixed with the vertical supporting component;
the three-component force sensor is used for bearing a preset vertical load on a wheel of the force measuring wheel pair, and acquiring support reaction forces in three directions when the longitudinal sliding table bears the preset longitudinal load.
Due to the adoption of the technical scheme, the embodiment of the application has the following technical effects:
the longitudinal mounting platform is a mounting base of the longitudinal force measuring device. Two wheels of the force measuring wheel pair are arranged on the vertical supporting components of the two longitudinal force measuring devices. A preset vertical load is applied to the wheels of the force measuring wheel pair, and meanwhile, the longitudinal sliding table is also loaded with the preset longitudinal load, namely the load is loaded in the vertical direction and the longitudinal direction simultaneously. Therefore, the longitudinal force measuring system can realize force measurement calibration for loading loads in the vertical direction and the longitudinal direction simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of a calibration test bed for a load wheel set according to an embodiment of the present disclosure;
FIG. 2 is a front view of the calibration test stand for the load wheel set shown in FIG. 1;
FIG. 3 is a side view of the calibration test stand for the load wheel set shown in FIG. 1;
FIG. 4 is a partial schematic view of a calibration test stand for the load wheel set shown in FIG. 1;
FIG. 5 is a partial schematic view of the calibration test stand of the load wheel set shown in FIG. 4;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is a partial schematic view of the longitudinal and vertical force measurement systems of the calibration test stand of the force measuring wheel set shown in FIG. 1;
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a schematic view of the lateral force measurement system of the calibration test stand for a load cell wheel set shown in FIG. 1 and the relative position of the load cell wheel set;
FIG. 10 is a front view of FIG. 9;
fig. 11 is a side view of fig. 9.
Reference numerals:
100 test bed base platform, 110 lifting lugs, 120 supporting legs,
211 vertically supporting a roller, 212 supporting a roller mounting frame, 213 bottom three-component force sensor, 214 transverse sliding table, 214-1 transverse sliding table lower sliding block, 216 transverse moving lead screw, 216-1 transverse moving lead screw threaded rod,
221 vertical support rails, 222 rail mounts,
223 a bottom three-split force sensor of the track,
231 longitudinal sliding tables, 231-1 transverse guide grooves,
241 portal frame, 241-1 portal frame column, 241-2 portal frame beam, 242 vertical loading actuator, 243 vertical press-mounting beam,
251 transverse limiting device, 252 vertical guide rail, 252-1 strip rail, 252-2 strip blocks, 253 vertical sliding block, 254 vertical guide transition piece,
260 longitudinal mounting platform, 261 longitudinal guide slot,
270 longitudinal loading of the screw, 271 longitudinal loading of the threaded rod of the screw,
310 of the supporting base in the transverse direction,
320 transverse connector, 321 transverse connector body, 322 transverse connector support rib, 323 transverse connector reinforcing rib,
330 load sensors, 340 load roller mounts, 350 lateral load rollers, 360 lateral load actors,
371 lateral load rail, 372 lateral slide.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
As shown in fig. 1, fig. 2 and fig. 3, the calibration test stand for a load-measuring wheel set of the embodiment of the present application includes:
a test stand base platform 100;
the longitudinal force measuring system is detachably arranged on the test bed base platform 100;
the vertical force measuring system is detachably arranged on the test bed base platform 100;
and the transverse force measuring system is detachably arranged on the base platform 100 of the test bed.
The calibration test bed for the force measuring wheel set can achieve static force measurement calibration and dynamic force measurement calibration in the vertical direction, static force measurement calibration and dynamic force measurement calibration in the transverse direction, and vertical and longitudinal combined static force measurement calibration and dynamic force measurement calibration.
The following describes each force measuring system of the calibration test bed of the force measuring wheel set in the embodiment of the present application.
With respect to the bench base platform:
as shown in fig. 1 and 2, a test stand base platform 100 is secured to the laboratory parameter testing test stand foundation and serves as a foundation for the entire load cell pair calibration test stand. In order to ensure the strength and the service performance of the test bed base platform, the material is HT300, the test bed base platform is annealed to eliminate casting stress after being cast, flaw detection inspection is carried out according to relevant standards after preliminary machining, secondary aging treatment is carried out on the platform after the qualification is confirmed to eliminate the residual internal stress of a casting, and finally finish machining is carried out, the occupied area is about 6.27m multiplied by 3.9m, the upper part of the platform is provided with a cross T-shaped groove, and the installation and the fixation of other parts of the test system are convenient. Lifting lugs 110 are arranged at four corners of the test platform, so that the test platform can be conveniently moved integrally. Under the platform 8 support legs 120 are provided for fixing with the lower parameter table base,
with respect to the longitudinal force measurement system and the vertical force measurement system, the two are combined together without being completely separated. Below, in order to
The view angle of the longitudinal force measuring system is mainly explained.
The longitudinal force measuring system comprises two longitudinal force measuring devices, and one longitudinal force measuring device corresponds to one wheel of the force measuring wheel pair. The longitudinal force measuring device is used for applying longitudinal load and vertical load to the wheels of the force measuring wheel pair corresponding to the longitudinal force measuring device, and carrying out force measurement calibration.
As shown in fig. 1, 2, 3, 4, 5, 7 and 8, the longitudinal force measuring device comprises:
a longitudinal mounting platform 260;
the longitudinal sliding table 231 is slidably connected above the longitudinal installation platform 260, and the longitudinal sliding table 231 can slide in the longitudinal direction above the longitudinal installation platform 260;
the vertical supporting assembly is arranged above the longitudinal sliding table and is used for supporting wheels of the force measuring wheel pair;
the three-component force sensor is fixed with the vertical supporting component;
the three-component force sensor is used for bearing a preset vertical load on a wheel of the force measuring wheel pair, and acquiring support reaction forces in three directions when the longitudinal sliding table bears the preset longitudinal load.
The longitudinal mounting platform is a mounting base of the longitudinal force measuring device. Two wheels of the force measuring wheel pair are arranged on the vertical supporting components of the two longitudinal force measuring devices. A preset vertical load is applied to the wheels of the force measuring wheel pair, and meanwhile, the longitudinal sliding table is also loaded with the preset longitudinal load, namely the load is loaded in the vertical direction and the longitudinal direction simultaneously. Therefore, the longitudinal force measuring system can realize force measurement calibration for loading loads in the vertical direction and the longitudinal direction simultaneously.
Specifically, the longitudinal direction is coincident with the direction of travel of the load cell wheel pair.
In practice, as shown in fig. 7 and 8, the longitudinal mounting platform 260 has a longitudinal guide slot 261, the guide direction of which is consistent with the longitudinal direction;
the bottom of the longitudinal sliding table 231 is provided with a longitudinal sliding table lower sliding block which is arranged in the longitudinal guide groove 261 and can slide along the guide direction of the longitudinal guide groove 261;
wherein, the width of the notch of the longitudinal guide groove 261 is smaller than the width of the groove bottom of the longitudinal guide groove 261, and the cross section of the longitudinal sliding table lower slide block is consistent with the cross section of the longitudinal guide groove 261.
The longitudinal guide groove and the longitudinal sliding table lower sliding block are matched, and the longitudinal sliding table can slide on the longitudinal mounting platform along the longitudinal direction through a simple structure. The width of the notch of the longitudinal guide groove is smaller than the width of the groove bottom, and the cross section of the lower sliding block of the longitudinal sliding table is consistent with the shape of the cross section of the longitudinal guide groove, so that the lower sliding block of the longitudinal sliding table cannot be separated from the notch of the longitudinal guide groove when the lower sliding block of the longitudinal sliding table is clamped in the longitudinal guide groove.
In implementation, the longitudinal sliding table is provided with a longitudinal sliding table threaded hole along the longitudinal direction;
as shown in fig. 7 and 8, the longitudinal force measuring device further includes:
the longitudinal loading screw rod 270 is fixed at the bottom of the longitudinal guide groove 261, and a threaded rod 271 of the longitudinal loading screw rod is in threaded fit with the threaded hole of the longitudinal sliding table;
the longitudinal loading screw 270 is used for applying a longitudinal load to the longitudinal sliding table.
And the longitudinal loading screw rod is matched with the threaded hole of the longitudinal sliding table, so that longitudinal load can be applied to the longitudinal sliding table.
As shown in fig. 1, 2, 3, 4, 5, 7 and 8, the vertical support assembly comprises:
a support roller mounting bracket 212, at which the vertical support roller 211 is vertically installed and the vertical support roller 211 can vertically rotate;
the bottom three-component force sensor comprises a roller bottom three-component force sensor 213 fixed below the support roller mounting bracket 212; the longitudinal sliding table 231 is fixed below the roller bottom three-component force sensor 213;
the roller bottom three-component force sensor 213 is configured to obtain support reaction forces in three directions when a wheel of the force measuring wheel pair bears a preset vertical load and rotates at a preset speed to drive the vertical support roller 211 to rotate.
Two wheels of the force measuring wheel pair are arranged above the vertical supporting rollers of the two supporting assemblies. The vertical supporting roller plays a supporting role for the wheels of the force measuring wheel set. The wheel of dynamometry wheel pair applys predetermined vertical load, and the wheel rotates with predetermined speed simultaneously, and at this moment, the wheel of dynamometry wheel pair can drive vertical supporting roller rotatory, and the three fens force transducer in gyro wheel bottom can acquire the counter-force of bearing of three direction to carry out the output. Therefore, the dynamic force measurement calibration of the force measurement wheel pair in the vertical direction is realized.
In implementation, three fens force transducer in gyro wheel bottom still are used for bearing predetermined vertical load and rotate with predetermined speed and drive at the wheel of dynamometry wheel pair vertical supporting roller is rotatory, just when vertical slip table bears predetermined longitudinal load, acquires the counter-force of three direction.
Applying a preset vertical load to the wheels of the force measuring wheel pair, and rotating the wheels at a preset speed; meanwhile, the longitudinal sliding table is also loaded with a preset longitudinal load. In this state, the roller bottom three-split force sensor can acquire and output the support reaction forces in three directions. Therefore, dynamic force measurement calibration of the force measuring wheel pair in the vertical direction and the longitudinal direction is realized. It should be noted that the longitudinal slide can be moved in the longitudinal direction above the longitudinal mounting platform when the pair of force-measuring wheels is not placed above the vertical support rollers. When the force measuring wheel pair is arranged above the vertical support roller and carries out dynamic force measurement calibration on the force measuring wheel pair in the vertical direction and the longitudinal direction, the longitudinal sliding table does not slide relative to the longitudinal direction although bearing the longitudinal load under most conditions according to the preset size of the longitudinal load. Only in the case of a large longitudinal load does the longitudinal slides slide relative to one another in the longitudinal direction. The dynamic force measurement calibration needs to use the support reaction force data of the roller bottom three-component force sensor before the longitudinal sliding table relatively slides in the longitudinal direction.
Specifically, the value of the preset vertical load may be plural, and the value of the preset speed at which the wheel rotates may be plural.
Specifically, the support roller mounting frame has a horizontally fixed support roller mounting frame center axis, the center through hole of the vertical support roller passes through the support roller mounting frame center axis, and the vertical rotation is that the vertical support roller rotates with the support roller mounting frame center axis as the center.
In an implementation, as shown in fig. 7 and 8, the longitudinal force measuring device further includes:
a transverse sliding table 214 which is slidably connected to the longitudinal sliding table 231 and on which the transverse sliding table 214 can slide in the transverse direction;
the roller bottom three-component force sensor 213 is fixed on the transverse sliding table 214, and the transverse direction is consistent with the thickness direction of the vertical support roller.
The wheels of the force measuring wheel pair have a certain thickness. The thickness of the vertical supporting roller is smaller than that of the wheel of the force measuring wheel pair. Therefore, under the condition that the preset vertical load value and the preset speed value of wheel rotation are kept unchanged, the contact point of the vertical support roller and the wheel of the force measuring wheel pair can be adjusted in the transverse direction, and therefore more complete dynamic force measurement calibration can be obtained. Through the interactive connection of horizontal slip table on vertical slip table, realized the slip of horizontal slip table in the transverse direction to realized under the unchangeable condition in the position of transverse direction at vertical slip table, vertical supporting roller can slide in the transverse direction. Under the condition that the position of the force measuring wheel pair is kept unchanged, the contact point of the vertical supporting roller and the wheel of the force measuring wheel pair can be adjusted in the transverse direction.
Specifically, the range that the transverse sliding table can slide on the longitudinal sliding table along the transverse direction is larger than 0mm and smaller than or equal to 140 mm. The contact point of the wheels corresponding to the vertical support roller and the force measuring wheel pair can be adjusted in the transverse direction.
The range that the transverse sliding table can slide on the longitudinal sliding table along the transverse direction is large, and the transverse sliding table can adapt to wheels of various force measuring wheel pairs.
In practice, as shown in fig. 7 and 8, the longitudinal sliding table 231 is provided with a transverse guide groove 231-1, and the guide direction of the transverse guide groove 231-1 is consistent with the transverse direction;
the bottom of the transverse sliding table is provided with a transverse sliding table lower sliding block 214-1, the transverse sliding table lower sliding block 214-1 is arranged in the transverse guide groove 231-1, and the transverse sliding table lower sliding block 214-1 can slide along the guide direction of the transverse guide groove 231-1;
the width of the notch of the transverse guide groove 231-1 is smaller than the width of the groove bottom of the transverse guide groove 231-1, and the cross section of the transverse sliding table lower slide block 214-1 is consistent with the cross section of the transverse guide groove 231-1 in shape.
The mode that horizontal guide way and horizontal slip table gliding block cooperate has realized through simple structure that horizontal slip table slides along the transverse direction on vertical slip table. The width of the notch of the transverse guide groove is smaller than the width of the groove bottom, and the cross section of the lower sliding block of the transverse sliding table is consistent with the shape of the cross section of the transverse guide groove, so that when the lower sliding block of the transverse sliding table is clamped in the transverse guide groove, the lower sliding block of the transverse sliding table cannot be separated from the notch of the transverse guide groove.
In practice, as shown in fig. 7 and 8, the transverse sliding table is provided with a transverse sliding table threaded hole along the transverse direction;
the longitudinal force measuring device further comprises:
the transverse moving screw rod 216 is fixed at the bottom of the transverse guide groove 231-1, and a threaded rod 216-1 of the transverse moving screw rod is in threaded fit with a threaded hole of the transverse sliding table;
the transverse moving screw 216 is configured to drive the transverse sliding table 214 to move in a transverse direction relative to the longitudinal sliding table 231, so that the contact position between the vertical support roller 211 and the wheel of the force measuring wheel pair can move in the transverse direction.
The transverse sliding table moves along the transverse direction relative to the longitudinal sliding table through the cooperation of the transverse moving screw rod and the threaded hole of the transverse sliding table, the moving precision is high, and the moving distance is controllable.
Specifically, the thread pitch of the threaded rod 216-1 of the transverse moving lead screw is greater than or equal to 0.8mm and smaller than or equal to 1.5 mm. The pitch of the threaded rod of the transverse displacement screw determines the accuracy with which the contact point of the vertical support roller and the wheel of the force measuring wheel pair is displaced in the transverse direction.
Specifically, the thread pitch of the threaded rod 216-1 of the transverse moving screw rod is 1 mm.
In practice, as shown in fig. 7 and 8, the vertical support assembly further comprises:
a vertical support rail 221 and a rail mount 222, the vertical support rail 221 being fixed above the rail mount 222;
the three-component force sensor further comprises a rail bottom three-component force sensor 223 fixed below the rail mounting frame 222 and above the longitudinal sliding table 231;
the track bottom three-component sensor 223 is configured to obtain support reaction forces in three directions when a wheel of the force measuring wheel set bears a preset vertical load and the vertical support track statically supports the wheel of the force measuring wheel set.
Two wheels of the force measuring wheel pair are arranged above the two vertical supporting rails. The vertical supporting track plays a supporting role for the wheels of the force measuring wheel set. A preset vertical load is applied to the wheels of the force measuring wheel pair, and the three-component force sensor at the bottom of the track can acquire and output support reaction forces in three directions. Therefore, the static force measurement calibration of the force measurement wheel pair in the vertical direction is realized.
In implementation, as shown in fig. 7 and 8, the rail bottom three-split force sensor 223 is further configured to obtain support reaction forces in three directions when the wheels of the force measuring wheel pair bear a preset vertical load and are statically supported by the vertical support rail 221, and the longitudinal sliding table 214 bears a preset longitudinal load.
Two wheels of the force measuring wheel pair are arranged above the two vertical supporting rails. The vertical supporting track plays a supporting role for the wheels of the force measuring wheel set. Applying a preset vertical load to the wheels of the force measuring wheel pair; meanwhile, the longitudinal sliding table is also loaded with a preset longitudinal load. In this state, the rail bottom three-split force sensor can acquire and output the support reaction forces in the three directions. Therefore, the static force measurement calibration of the force measurement wheel pair in the vertical direction and the longitudinal direction is realized. When the force measuring wheel pair is arranged on the vertical supporting track and carries out static force measurement calibration on the force measuring wheel pair in the vertical direction and the longitudinal direction, the longitudinal sliding tables do not slide relative to each other in the longitudinal direction although bearing the longitudinal load under most conditions according to the preset size of the longitudinal load. Only in the case of a large longitudinal load does the longitudinal slides slide relative to one another in the longitudinal direction. The static force measurement calibration needs to use the support reaction force data of the three-component force sensor at the bottom of the track before the longitudinal sliding table relatively slides in the longitudinal direction.
In an implementation, as shown in fig. 1, 2, 3, 4 and 5, the longitudinal force measuring device further includes:
the gantry comprises two gantry columns 241-1 and a gantry beam 241-2, wherein one gantry corresponds to one vertical support roller, the gantry beam 241-2 is fixedly arranged between the two gantry columns 241-1, and the gantry beam 241-2 can move up and down along the gantry columns 241-1 and is fixed after moving;
the vertical loading actuator 242 is hung below the portal frame beam 241-2, and the vertical loading actuator 242 can move along the portal frame beam 241-2 and is fixed after moving;
the vertical press-fitting cross beam 243 is arranged at the lower end of the vertical loading actuator 242, and the vertical press-fitting cross beam 243 is used for pressing on one axle box of the force-measuring wheel pair;
the vertical loading actuator 242 is configured to apply a vertical load to one axle box of the force-measuring wheel pair by the vertical press-fitting beam 242 through the vertical press-fitting beam 242, so that wheels of the force-measuring wheel pair bear a preset vertical load.
The portal frame is an installation foundation of the vertical loading actuator. The vertical press-fitting beam needs to be pressed on one axle box of the force-measuring wheel pair. The portal frame crossbeam can be followed the portal frame stand reciprocates and removes the after-fixing, and like this, vertical pressure equipment crossbeam also can be adjusted at the height of vertical direction, can realize like this that vertical pressure equipment crossbeam presses on one axial of dynamometry wheel pair. The vertical loading actuator can move along the portal frame beam and can be fixed after moving, and therefore the position of the vertical press-fitting beam can be adjusted along the length direction, namely the longitudinal direction, of the portal frame beam. When the vertical press-mounting cross beam is in contact with one axle box of the force measuring wheel pair, the vertical loading actuator is used for applying a vertical load to the vertical press-mounting cross beam, so that the vertical press-mounting cross beam applies a vertical load to one axle box of the force measuring wheel pair.
In particular, the gantry is a gantry of Q345 material.
In an implementation, as shown in fig. 1, 2, 3, 4 and 5, the longitudinal force measuring device further includes:
two transverse limiting devices 251 installed at the outer side of the portal frame 241;
the two vertical guide devices comprise vertical guide rails 252 and vertical sliding blocks 253, the vertical guide rails 252 are fixed on the vertical side faces, facing the force measuring wheel pairs, of the transverse limiting devices, the guide direction is the vertical direction, the vertical sliding blocks 253 are matched with the vertical guide rails 252, and the vertical sliding blocks can slide along the vertical guide rails 252;
two vertical guide transition pieces 254, wherein one vertical guide transition piece 254 is fixed at each of the two ends of the vertical press-fitting crossbeam 243, and the two vertical guide transition pieces 254 are respectively fixed with the two vertical sliding blocks 253;
the vertical guide rail, the vertical sliding block and the vertical guide transition piece are matched to guide the vertical movement of the vertical press-fitting cross beam.
One longitudinal force measuring device has two transverse limiting devices, and the two longitudinal force measuring devices have four transverse limiting devices in total. When the force measuring wheel pair is supported on the vertical supporting roller or the vertical supporting track, the two vertical press-mounting cross beams are respectively pressed on the two axle boxes of the force measuring wheel pair. Two ends of each vertical press-fitting cross beam are fixed to the two vertical sliding blocks through vertical guide transition pieces. Therefore, in the transverse direction, the transverse limiting of the two sides of the force measuring wheel pair is realized, so that the force measuring wheel pair cannot move in the transverse direction. The vertical guide rail, the vertical sliding block and the vertical guide transition piece are matched, so that the vertical press-fitting cross beam can guide when applying vertical load in the vertical direction, and the deviation of the direction can not occur.
In implementation, the vertical support roller, the support roller mounting frame, the three-component force sensor at the bottom of the roller and the gravity center of the transverse sliding table are positioned on the same straight line; therefore, the vertical load borne by the wheels of the force measuring wheel pair is applied to the three-component force sensor at the bottom of the roller and the transverse sliding table through the vertical supporting roller, and the vertical load cannot deviate or deviates less. The vertical supporting roller, the supporting roller mounting frame and the transverse sliding table are less worn.
The gravity centers of the track mounting frame and the three-component force sensor at the bottom of the track are positioned on the same straight line; therefore, the vertical load borne by the wheels of the force measuring wheel pair is applied to the three-component force sensor at the bottom of the track through the vertical supporting track, and the vertical load cannot deviate or deviates less. The track is vertically supported, and the track mounting rack is less worn.
The upper rail surface of the vertical support rail is parallel to the upper wheel surface of the vertical support roller wheel, the vertical support rail and the vertical support roller wheel are adjacently arranged in the longitudinal direction, and the longitudinal direction is consistent with the length direction of the vertical support rail;
each longitudinal force measuring device further comprises two fixing devices, the fixing devices are used for fixing the vertical press-mounting cross beam and the axle box of the force measuring wheel pair when the two are in contact, and the vertical loading actuator is further used for lifting the force measuring wheel pair and the press-mounting cross beam which are fixed together upwards.
Thus, the fixing device fixes the vertical press-mounting beam and the force measuring wheel pair together on the axle box of the vertical press-mounting beam and the force measuring wheel pair; when the force measuring wheel pair needs to be switched between the vertical support rail and the vertical support roller, the vertical loading actuator can lift the fixed force measuring wheel pair and the press-fitting cross beam upwards to leave the vertical support rail or the vertical support roller, the longitudinal direction position is switched by adjusting the position of the vertical loading actuator at the cross beam of the portal frame, the fixed force measuring wheel pair and the fixed press-fitting cross beam fall to the vertical support roller or the vertical support rail, and the static force measuring calibration and the dynamic force measuring calibration are switched.
In operation, as shown in fig. 6, the vertical guide rail 252 includes:
two spaced apart bar tracks 252-1;
a bar-shaped block 252-2 having a guide groove, the bar-shaped block 252-2 being centrally disposed between the two bar-shaped rails 252-1;
the vertical slider 253 includes:
the two clamping grooves 253-1 are matched with the strip-shaped rails and are in clamping fit with the strip-shaped rails;
and the clamping block is matched with the guide groove in a clamping manner.
In implementation, the longitudinal force measuring system comprises two longitudinal force measuring devices, and the vertical support rollers of the two longitudinal force measuring devices are respectively used for supporting two wheels of a force measuring wheel pair.
Therefore, each group of vertical guide rails and vertical sliding blocks are provided with three structures capable of guiding, so that vertical loads of the vertical press-mounting cross beam can be locally applied to the axle box of the force-measuring wheel pair without deviation or with less deviation.
Specifically, the vertical force measuring system comprises two vertical force measuring devices, wherein each vertical force measuring device comprises the vertical support assembly and the three-component force sensor, namely, one part of the vertical force measuring device is reused as the vertical force measuring device.
With respect to lateral force measurement systems.
As shown in fig. 9, 10 and 11, the lateral force measuring system includes:
a transverse support seat 310;
a transverse connecting member 320 slidably connected to the transverse support seat 310, wherein the transverse connecting member 320 can slide in a transverse direction on the transverse support seat 310;
a load cell 330 fixed to an outer side of the cross-link 320;
a loading roller mounting bracket 340 fixed to an outer side of the load sensor 330;
a lateral loading roller 350 installed laterally at the loading roller mounting bracket 340, the lateral loading roller 350 being capable of rotating laterally;
wherein:
the transverse connecting piece is used for sliding in the transverse direction to enable the transverse loading roller to abut against the inner side of the wheel of the testing wheel pair;
the load sensor is used for acquiring support reaction force in the transverse direction when wheels of the force measuring wheel pair rotate above the vertical supporting roller at a preset speed and the transverse loading roller applies a preset transverse load to the inner sides of the wheels of the force measuring wheel pair;
the load sensor is also used for acquiring the support reaction force in the transverse direction when the wheels of the force measuring wheel pair are statically supported by the vertical support rail and the transverse loading roller applies a preset transverse load to the inner sides of the wheels of the force measuring wheel pair.
Two wheels of the force measuring wheel pair are arranged above the vertical supporting rollers of the two longitudinal force measuring devices. The vertical supporting roller plays a supporting role for the wheels of the force measuring wheel set.
And applying a preset vertical load to the wheels of the force measuring wheel pair, and simultaneously rotating the wheels at a preset speed. At the moment, the longitudinal force measuring system can be used for calibrating the dynamic force measurement of the force measuring wheel pair in the vertical direction, the transverse loading roller is driven by the transverse connecting piece to move in the transverse direction to be abutted against the inner side of the wheel of the testing wheel pair, the transverse loading roller applies a preset transverse load to the inner side of the wheel of the force measuring wheel pair, and the load sensor acquires and outputs the support reaction force in the transverse direction. Therefore, dynamic force measurement calibration of the force measuring wheel pair in the transverse direction and the vertical direction is realized.
When the wheel of the force measuring wheel pair is not applied with a preset vertical load and rotates at a preset speed, the transverse loading roller applies a preset transverse load on the inner side of the wheel of the force measuring wheel pair, and the load sensor acquires and outputs a support reaction force in the transverse direction. Therefore, dynamic force measurement calibration of the force measuring wheel pair in the transverse direction is realized.
Specifically, the arrangement mode of the transverse loading roller enables the transverse loading roller to rotate in the transverse direction and to be matched with the inner side of the wheel of the rotating force measuring wheel pair.
Specifically, the loading roller mounting bracket has a vertically fixed loading roller mounting bracket center axis, the center through hole of the transverse loading roller passes through the loading roller mounting bracket center axis, and the transverse rotation is that the transverse loading roller rotates around the loading roller mounting bracket center axis.
In implementation, the load sensor is further configured to obtain a support reaction force in the transverse direction when the wheels of the force measuring wheel pair are stationary, that is, the wheels do not rotate, and the transverse loading roller applies a preset transverse load to the inner sides of the wheels of the force measuring wheel pair.
Two wheels of the force measuring wheel pair are arranged on the vertical supporting rails of the two longitudinal force measuring devices.
The vertical supporting track plays a supporting role for the wheels of the force measuring wheel set. At the moment, the vertical force measuring system can be used for calibrating the static force measurement of the force measuring wheel pair in the vertical direction, the transverse loading roller is driven by the transverse connecting piece to move in the transverse direction to be abutted against the inner side of the wheel of the testing wheel pair, the transverse loading roller applies a preset transverse load to the inner side of the wheel of the force measuring wheel pair, and the load sensor acquires and outputs the support reaction force in the transverse direction. Therefore, the static force measurement calibration of the force measurement wheel pair in the transverse direction and the vertical direction is realized.
The preset vertical load is not applied to the wheels of the force measuring wheel pair, the preset transverse load is applied to the inner sides of the wheels of the force measuring wheel pair by the transverse loading roller, and the load sensor acquires and outputs the support reaction force in the transverse direction. Therefore, the static force measurement calibration of the force measurement wheel pair in the transverse direction is realized.
Thus, the transverse force measuring system can realize the dynamic force measuring calibration and the static force measuring calibration in the transverse direction; the transverse force measuring system is matched with the longitudinal force measuring system, and static force measuring calibration and dynamic force measuring calibration in the transverse direction and the vertical direction can be realized.
As shown in fig. 9, 10 and 11, the lateral force measuring system further includes:
a transverse loading actuator 360 transversely fixed on the transverse support seat 310, the transverse connecting member 320 is fixed at one end of the transverse loading actuator 360, and the transverse loading actuator 360 and the load sensor 330 are arranged oppositely;
the transverse loading roller 350 is higher than the upper end of the transverse loading actuator 360;
wherein the transverse loading actuator 360 is capable of extending and retracting and is configured to apply a transverse load to the transverse link such that the transverse loading roller 350 applies a predetermined transverse load to an inner side of one wheel of the load cell pair.
The transverse loading actuator, the transverse connecting piece, the load sensor, the loading roller mounting frame and the transverse loading roller are connected in a mode, so that the transverse loading roller can move in the transverse direction on one hand to adapt to the condition that the distance between two wheels of various force measuring wheel pairs, namely the track gauge, is various, and on the other hand, transverse load application is also realized.
The introduction of the cross-connecting member is intended to achieve that the cross-loading roller is higher than the upper end of the cross-loading actuator, thus avoiding the possibility that the cross-loading actuator will interfere with other structures of the load-measuring wheel pair, such as the axle housing.
In practice, as shown in fig. 9, 10 and 11, the lateral force measuring system further comprises a lateral guiding device comprising:
a transverse loading guide 371 fixed above the transverse support seat 310 and below the transverse connector 320, wherein the guiding direction of the transverse loading guide 371 is a transverse direction;
the transverse sliding block 372 is fixed at the outer bottom of the transverse connecting piece 320, and is in clamping fit with the transverse loading guide rail 371;
the transverse loading guide rail is matched with the transverse sliding block to guide the extension and the contraction of the transverse connecting piece in the transverse direction.
The transverse loading guide rail is matched with the transverse sliding block, so that the fixed transverse connecting piece, the loading roller mounting frame and the transverse loading roller move in the transverse direction, when a preset transverse load is applied through the transverse loading roller, the guide is carried out, and the deviation of the direction can not occur.
In practice, as shown in fig. 9, 10 and 11, the transverse connector 320 includes:
an L-shaped transverse connector body 321, wherein the outer side of the vertical arm of the transverse connector body 321 is fixed to the transverse loading actuator 360, the inner side of the vertical arm of the transverse connector body 321 is fixed to the load sensor 330, and the outer side of the transverse arm of the transverse connector body 321 is fixed to the transverse slider 372;
the two ends of the transverse connecting piece supporting rib 322 are fixed at the inner side of the transverse arm of the transverse connecting piece main body 321 and the outer bottom of the loading roller mounting rack 340; wherein the cross-connector support ribs 322 support the loading roller mount 340;
two transverse connector reinforcing ribs 323 arranged in parallel, wherein two ends of each transverse connector reinforcing rib 323 are respectively fixed on the inner sides of the vertical arm and the transverse arm of the transverse connector main body 321; wherein the cross-connector support ribs 322 and the loading roller mounting bracket 340 are located between two cross-connector ribs 323.
The L-shaped transverse connecting piece main body is simple in structure, and meanwhile, installation space can be provided for the transverse loading actuator, the load sensor, the transverse sliding block and the transverse connecting piece supporting rib. The L-shaped transverse connecting piece main body, the loading roller mounting frame and the transverse connecting piece support rib approximately form a frame shape, so that the structure is stable. The reinforcing ribs of the transverse connecting piece strengthen the frame shape, so that the structure of the whole transverse connecting piece is more stable.
In implementation, the transverse connecting pieces, the load sensors, the loading roller mounting frames and the transverse loading rollers and the transverse guiding devices are respectively two and are symmetrically arranged on the transverse supporting seat.
Therefore, the transverse force measuring system is of a symmetrical structure, and the two transverse loading rollers can extend and contract back to back and abut against the inner sides of the two wheels of the force measuring wheel pair to simultaneously carry out force measuring calibration.
The main technical indexes of the calibration test bed for the force measuring wheel set in the embodiment of the application are as follows:
the calibration test bed for the force measuring wheel set can be used for calibrating the force measuring wheel set of a 27t large-axle-load vehicle:
the maximum loading capacity of the vertical loading actuator is set to 300 kN;
the maximum loading capacity of the transverse loading actuator is set to 150 kN;
the maximum loading capacity of the longitudinal loading screw was set to 50 kN.
Specifically, the test bed base platform is made of rigid materials;
the transverse supporting seat is made of rigid materials;
the transverse connecting piece is made of rigid materials;
the loading roller mounting frame is made of rigid materials;
the transverse loading guide rail is made of rigid materials;
the transverse sliding block is made of rigid materials;
the support roller mounting bracket is made of rigid materials;
the longitudinal sliding table is made of rigid materials;
the longitudinal installation platform is made of rigid materials;
the transverse sliding table is made of rigid materials;
the vertical supporting rail is made of rigid materials;
the track mounting is of a rigid material;
the portal frame is made of rigid materials;
the transverse limiting device is made of rigid materials;
the vertical guide device is made of rigid materials.
Specifically, the vertical force measuring system, the transverse force measuring system and the longitudinal force measuring system are detachably arranged on the base platform of the test bed. Because the vertical force measuring system, the transverse force measuring system and the longitudinal force measuring system are detachably mounted and can be conveniently dismounted, the force measuring wheel set can be conveniently assembled and disassembled.
Specifically, the distance between two vertical support rails and the distance between two vertical support rollers determine the force measuring wheel set which can be suitable for various track gauges, and force measuring calibration can be carried out on the force measuring wheel set with various track gauges by adjusting the distance between two longitudinal installation platforms. Dynamometric wheels of various gauges, such as metric rail (1000mm), standard rail (1435mm) to wide rail (1676 mm).
Specifically, the portal frame crossbeam can be followed the portal frame stand reciprocates and removes the after-fixing, and like this, vertical pressure equipment crossbeam also can be adjusted at the height of vertical direction, and like this, the distance between vertical support rail and the vertical pressure equipment crossbeam, distance between vertical supporting roller and the vertical pressure equipment crossbeam, can be adjusted, make vertical dynamometry system can mark the dynamometry of the dynamometry wheel pair in certain wheel footpath, distance more than or equal to 800mm less than or equal to 1200mm between vertical support rail and the vertical pressure equipment crossbeam, distance more than or equal to 800mm less than or equal to 1200mm between vertical supporting roller and the vertical pressure equipment crossbeam.
In the description of the present application and the embodiments thereof, it is to be understood that the terms "top", "bottom", "height", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
In this application and its embodiments, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application and its embodiments, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (15)
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