CN116879077B - Integrated detection device for fatigue strength of electrified railway hanger - Google Patents
Integrated detection device for fatigue strength of electrified railway hanger Download PDFInfo
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- CN116879077B CN116879077B CN202311130943.1A CN202311130943A CN116879077B CN 116879077 B CN116879077 B CN 116879077B CN 202311130943 A CN202311130943 A CN 202311130943A CN 116879077 B CN116879077 B CN 116879077B
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 5
- 230000002929 anti-fatigue Effects 0.000 description 4
- 238000009661 fatigue test Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
Abstract
The invention belongs to the technical field of hanger tests, in particular to an integrated detection device for the fatigue strength of an electrified railway hanger, which comprises a numerical control machine tool for integrating parts and a hanger wire to be detected, wherein the inner surface of the numerical control machine tool is fixedly connected with a support connecting plate, the two ends of the hanger wire are provided with fixing devices, the inner surface of the upper end of the numerical control machine tool is provided with a winding device, the inner surface of the lower end of the numerical control machine tool is provided with a traction device, and the inner surface of the middle end of the numerical control machine tool is provided with a pushing device. According to the integrated detection device for the fatigue strength of the electrified railway dropper, the integrated detection device is operated through the driving motor, and the traction screw rods are controlled to synchronously rotate through the belt pulley assembly, so that the traction tube sleeve sleeved on the outer surface of the integrated detection device moves downwards to tighten the dropper wires, the traction force is detected through the tension pressure sensor, excessive tightening of the dropper wires can be avoided, and meanwhile, the dropper wires can be controlled to be tightened in the same state to perform unified detection.
Description
Technical Field
The invention relates to the technical field of hanger tests, in particular to an integrated detection device for fatigue strength of an electrified railway hanger.
Background
The high-speed railway contact net is key equipment for guaranteeing safe operation of a locomotive, the integral hanger is one of important component parts of a contact net system, is arranged between a carrier rope and a contact line, is used for increasing contact suspension points, improving the relaxation degree and the elasticity uniformity of the contact line, adjusting the structural height of contact suspension, playing a role in a certain bearing capacity and carrying current, and when a pantograph passes through, the contact line is continuously lifted and vibrated, and the integral hanger is lifted and bent along with the contact line. Therefore, the integral hanger not only meets the bearing capacity requirement in chain-shaped suspension and ensures that current normally passes, but also has stronger fatigue resistance, and the bearing capacity, current carrying and fatigue resistance are key technical requirements of the integral hanger.
The existing test device for carrying out fatigue test on the dropper is used for horizontally testing, one end of the dropper is hung by a weight to simulate the tensile force born by the dropper, but the strength of the tensile force born by the dropper is not enough to be tested, the maximum tensile force born by the dropper can not be tested, and meanwhile, the test device has few simulation scenes, can not be used for simultaneously testing the pressure resistance and the torque of the dropper, and further, the overall strength of the dropper can not be improved.
Disclosure of Invention
Based on the technical problems, the invention provides an integrated detection device for the fatigue strength of the electrified railway hanger.
The invention provides an integrated detection device for fatigue strength of an electrified railway dropper, which comprises a numerical control machine tool for integrating parts and a dropper wire to be detected, wherein a support connecting plate is fixedly connected to the inner surface of the numerical control machine tool, guide rollers distributed in a rectangular array are arranged on the surface of the numerical control machine tool through connecting shafts, the inner surface of the guide rollers is in sliding contact with the outer surface of the dropper wire, fixing devices are arranged at two ends of the dropper wire, a winding device is arranged on the inner surface of the upper end of the numerical control machine tool, a traction device is arranged on the inner surface of the lower end of the numerical control machine tool, and a pushing device is arranged on the inner surface of the middle end of the numerical control machine tool.
The fixing device is used for fixedly connecting two ends of the hanging string to the surfaces of the winding device and the traction device so as to detect fatigue strength of the hanging string.
Wherein the pulling device tightens the hanging string with both ends fixed to detect fatigue strength.
The winding device is used for winding the tightened hanging string step by step, so that the tension resistance of the hanging string is detected.
Wherein the pushing device pushes the tightened hanging string horizontally forwards to detect the pressure resistance of the hanging string.
Preferably, the fixing device comprises a U-shaped clamping ring with a rough inner surface, the inner surface of the U-shaped clamping ring is in sliding contact with the outer surface of the hanging string, and threaded surfaces are formed on the outer surfaces of two ends of the U-shaped clamping ring.
Through above-mentioned technical scheme, in order to carry out quick fixed with the both ends of dropper line to be convenient for detect its stretch-draw nature, pressure resistance and torsion resistance, then make the both ends of dropper line pass coiling mechanism and draw-out mechanism respectively, then can make U type snap ring carry out the chucking with the both ends of dropper line, and then can detect its implementation.
Preferably, the fixing device further comprises a clamping and resisting plate, the surface of the clamping and resisting plate is in sliding sleeve joint with the outer surfaces of the two ends of the U-shaped clamping ring through a sliding hole which is formed in a penetrating mode, one side surface of the clamping and resisting plate is symmetrically distributed and fixedly connected with a limiting plate which surrounds the end face of the U-shaped clamping ring, the outer surfaces of the two ends of the U-shaped clamping ring are respectively in threaded sleeve joint with a fixing nut, and one side surface of the fixing nut is in sliding contact with one side surface of the clamping and resisting plate.
Through above-mentioned technical scheme, in order to be convenient for the quick detach fast-assembling of U type snap ring, make it fix the both ends of dropper wire simultaneously, then cup joint U type snap ring when the terminal surface of dropper wire, cup joint the chucking butt strap that the surface is the rubber material at the terminal surface of U type snap ring to make chucking butt strap and U type snap ring fix the both ends of dropper wire through gradually tightening fixation nut, guide spacing to chucking butt strap through concave limiting plate simultaneously.
Preferably, the pulling device comprises an L-shaped action cavity formed in the bottom end of the numerical control machine tool, the inner top wall of the action cavity is rotationally connected with pulling screws in a rectangular array distribution mode through bearings, the lower ends of the pulling screws extend to the inside of the action cavity, and a plurality of the pulling screws synchronously rotate through belt pulley assemblies.
Through the technical scheme, the lower end of the hanging string is connected to the surface of the traction device, so that the hanging string is tightly regulated, the plurality of traction screws are controlled to synchronously rotate through the belt pulley assembly, the hanging string connected to the outer surface of the hanging string can be pulled downwards, the hanging string can be tightly regulated, and the belt pulley assembly comprises a belt pulley sleeved with the inner surface of the belt pulley assembly.
Preferably, the traction device further comprises a driving motor fixedly installed on the inner top wall of the action cavity, the outer surface of an output shaft of the driving motor is connected with one end of the belt pulley assembly through a coupler, a traction pipe sleeve is sleeved on the outer surface of the traction screw in a threaded manner, and a traction pressure sensor which is a U-shaped shell is fixedly connected to the upper surface of the traction pipe sleeve.
According to the technical scheme, the pulling screw is driven to rotate to realize downward pulling, so that the pulling screw is driven to act through the driving motor, the pulling screw is controlled to synchronously rotate through the belt pulley assembly, the pulling pipe sleeve sleeved on the outer surface of the pulling pipe sleeve moves downwards to tighten the plurality of hanging strings, the pulling force is detected by the pulling pressure sensor, excessive tightening of the hanging strings can be avoided, and meanwhile, the hanging strings can be controlled to tighten in the same state to perform unified detection.
Preferably, the traction device further comprises a belt pulley roller fixedly connected to the inner surface of the tension pressure sensor, a movable cavity is formed in the roller shaft of the belt pulley roller, holes which are symmetrically distributed are formed in the inner wall of one side of the movable cavity in a penetrating mode, one end of the hanging string penetrates through the holes and is wound on the surface of the belt pulley roller, and a plurality of belt pulley rollers are connected through connecting rods.
According to the technical scheme, in order to connect one end of the hanging string with the surface of the traction device, one end of the hanging string passes through the perforation on one side and is pulled out from the perforation on the other side through the movable cavity, and after two circles of winding, one end of the hanging string is fixed through the fixing device.
Preferably, the winding device comprises a mounting cavity arranged inside two ends of the numerical control machine tool, the inner wall of the mounting cavity is rotationally connected with a rotating shaft through a bearing, the other group of belt pulley rollers are uniformly distributed at intervals and fixedly connected with the outer surface of the rotating shaft, the inner bottom wall of the mounting cavity is fixedly connected with a supporting lug plate, and the surface of the supporting lug plate is rotationally connected with the outer surface of the rotating shaft.
According to the technical scheme, in order to fix the upper end of the string, the upper end of the string is gradually rolled up to finish tension detection, the upper end of the string is fixed through the fixing device by the pulley roller on the rotating shaft, the pulley roller on the upper end is driven to rotate through the rotating shaft, the tightened string is rolled up to be tensioned, and the tension detection is realized by pulling the tension pressure sensor in the tensioning process.
Preferably, the winding device further comprises a ratchet wheel fixedly sleeved on the outer surface of one end of the rotating shaft, the installation cavity is close to the inner bottom wall of one end of the ratchet wheel and fixedly connected with a supporting plate, the surface of the supporting plate is rotationally connected with a rotating rod, one end of the rotating rod is fixedly sleeved with a pawl, a tension spring is installed on the surface of the supporting plate through a connecting column and fixedly connected with the surface of the pawl, the surface of the pawl is slidably clamped with the outer surface of the ratchet wheel, a gear motor is fixedly connected with the inner wall of the installation cavity, and the outer surface of an output shaft of the gear motor is fixedly connected with the outer surface of one end of the rotating shaft through a coupler.
Through above-mentioned technical scheme, in order to control the pivot and rotate, thereby drive a plurality of belt pulley rollers through installation gear motor control pivot of installation cavity inner wall and rotate and realize the action of rolling, in order to avoid the dropper line to collapse and make the pivot reverse rapidly and destroy check out test set, thereby through setting up the ratchet in the one end surface of pivot, when making the ratchet anticlockwise rotate gradually, can make articulated pawl joint at the flank of tooth of ratchet, and then can avoid the reversal of ratchet, simultaneously can keep the chucking power of pawl through tension spring's elasticity, and can make the belt pulley roller reset after rotating the connecting rod and driving the pawl and breaking away from the joint to the ratchet.
Preferably, the pushing device comprises ball bearings which are distributed in a rectangular array and fixedly connected to the surface of the numerical control machine tool, a pushing cylinder is fixedly connected to the inner surface of an inner ring of the ball bearings, a torque sensor is mounted on the outer surface of a piston rod of the pushing cylinder, a guide frame is fixedly connected to one side surface of the piston rod of the pushing cylinder, and the inner surface of the guide frame is movably sleeved with the outer surface of the hanging string.
According to the technical scheme, in order to enable the pushing device to detect the torque performance and the pressure resistance of the hanging string, the hanging string penetrates through the guide frame to conduct limit guide, when torque test is conducted, the hanging string is pulled backwards through the pushing cylinder to enable the hanging string to be in an angle, and then the plurality of pushing cylinders are controlled to rotate under the assistance of the ball bearings through the gear set in the numerical control machine tool, so that the torque sensor can detect the twisting of the hanging string, when pressure resistance detection is conducted, the pushing cylinder acts, the guide frame is pushed forwards gradually to enable the hanging string to be bent, and pressure resistance detection is completed.
Preferably, the pushing device further comprises a mounting block which is in rectangular array distribution and fixedly connected to one side surface of the supporting connecting plate and provided with a groove, the inner wall of the groove of the mounting block is in sliding connection with a telescopic block for compression adjustment, one side surface fixedly connected with a pressure and voltage sensor of the telescopic block, a buffer spring is mounted on the inner wall of the groove of the mounting block, and one side surface fixedly connected with a limit switch and a trigger rod which are sleeved on the inner surface of the buffer spring.
Through the technical scheme, in order to detect the pressure resistance of the string, a plurality of pushing cylinders synchronously move to push the guide frame to be gradually close to the surface of the telescopic block and compress the guide frame, so that the trigger rod on one side of the telescopic block touches the limit switch under the buffer of the buffer spring to stop the pushing cylinders, at the moment, the pushing force of the pushing cylinders is detected through the pressure sensor, and whether the pushing pressure is consistent or not and whether the pushing pressure reaches a preset pressure value or not is judged through the value of the sensor.
The beneficial effects of the invention are as follows:
1. through setting up fixing device, can carry out quick fixation to the both ends of dropper to be convenient for carry out anti-fatigue test to it, at the in-process of adjusting, cup joint the U type snap ring when the terminal surface of dropper, cup joint the chucking butt plate that the surface is the rubber material at the terminal surface of U type snap ring, and make chucking butt plate and U type snap ring fix the both ends of dropper through gradually tightening fixation nut, thereby can be convenient for the quick detach fast-assembling to the dropper.
2. Through setting up the draw gear, can make the fixed dropper line in both ends tighten, and then can realize accurate antifatigue test, in the in-process of adjusting, act through driving motor, make it control a plurality of tractive screw rods through belt pulley assembly and rotate in step, thereby make its outer surface sheathed traction tube cover move down and tighten a plurality of dropper lines, and the dynamics of pulling is detected to the tension of tension pressure sensor, and then can avoid the dropper line to tighten excessively, also can control a plurality of dropper lines to reach the tightening of same state and unify the detection simultaneously.
3. Through setting up coiling mechanism, can carry out the rolling step by step to the string of tightening to detect the tensile pull nature of string of tightening, at the in-process of adjusting, drive the belt pulley roller rotation of upper end through the pivot, and then make the string of tightening rolling and stretch-draw it, and pull pressure sensor to the in-process of stretching and realize the detection of stretch-draw nature, and through making articulated pawl joint at the flank of tooth of ratchet, and then can avoid the reversal of ratchet, can keep the chucking power of pawl through tension spring's elasticity simultaneously, and then can improve string of tightening and detect the security.
Drawings
FIG. 1 is a schematic diagram of an integrated detection device for fatigue strength of an electrified railway dropper;
FIG. 2 is a perspective view of a mounting cavity structure of the integrated detecting device for the fatigue strength of the electrified railway hanger;
FIG. 3 is a perspective view of a guide roller structure of an integrated detecting device for the fatigue strength of the electrified railway hanger;
FIG. 4 is a perspective view of a fixing device structure of an integrated detecting device for the fatigue strength of the electrified railway hanger;
FIG. 5 is a perspective view of a U-shaped snap ring structure of the integrated detection device for the fatigue strength of the electrified railway hanger;
FIG. 6 is a perspective view of the structure of a pulling device of the integrated detecting device for the fatigue strength of the electrified railway hanger;
FIG. 7 is a structural perspective view of a tension and pressure sensor of an integrated detecting device for the fatigue strength of an electrified railway hanger;
FIG. 8 is a perspective view of a pulley assembly structure of an integrated detection device for fatigue strength of an electrified railway hanger according to the present invention;
FIG. 9 is a perspective view of a ratchet wheel structure of an integrated detection device for fatigue strength of an electrified railway hanger;
FIG. 10 is a perspective view of a tension spring structure of an integrated detection device for fatigue strength of an electrified railway hanger according to the present invention;
FIG. 11 is a perspective view of a pushing cylinder structure of an integrated detection device for fatigue strength of an electrified railway hanger;
FIG. 12 is a perspective view of a guide frame structure of an integrated detecting device for the fatigue strength of an electrified railway hanger;
fig. 13 is a perspective view of a buffer spring structure of an integrated detecting device for fatigue strength of an electrified railway hanger.
In the figure: 1. a numerical control machine tool; 2. a hanger wire; 3. supporting the connecting plate; 4. a guide roller; 5. a fixing device; 51. a U-shaped clamping ring; 52. a thread surface; 53. clamping the retaining plate; 54. a limiting plate; 55. a fixing nut; 6. a pulling device; 61. an action cavity; 62. pulling the screw; 63. a driving motor; 64. a pulley assembly; 65. pulling the tube sleeve; 66. a pull pressure sensor; 67. a pulley roller; 68. a movable cavity; 69. perforating; 7. a winding device; 71. installing a cavity; 72. a rotating shaft; 73. supporting the ear plate; 74. a ratchet wheel; 75. a support plate; 76. a rotating rod; 77. a pawl; 78. a tension spring; 79. a speed reducing motor; 8. a pushing device; 81. a ball bearing; 82. a pushing cylinder; 83. a torque sensor; 84. a guide frame; 85. a mounting block; 86. a telescopic block; 87. a piezoelectric pressure sensor; 88. a buffer spring; 89. a limit switch; 90. a trigger lever.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-13, an integrated detection device for fatigue strength of an electrified railway dropper comprises a numerical control machine tool 1 for integrating parts and a dropper wire 2 to be detected, wherein a support connecting plate 3 is fixedly connected to the inner surface of the numerical control machine tool 1, guide rollers 4 distributed in a rectangular array are arranged on the surface of the numerical control machine tool 1 through connecting shafts, the inner surfaces of the guide rollers 4 are in sliding contact with the outer surfaces of the dropper wire 2, fixing devices 5 are arranged at two ends of the dropper wire 2, a winding device 7 is arranged on the inner surface of the upper end of the numerical control machine tool 1, a traction device 6 is arranged on the inner surface of the lower end of the numerical control machine tool 1, and a pushing device 8 is arranged on the inner surface of the middle end of the numerical control machine tool 1.
As shown in fig. 4 to 5, wherein the fixing device 5 fixedly connects both ends of the string 2 to the surfaces of the winding device 7 and the pulling device 6 to detect the fatigue strength thereof.
In order to fix the two ends of the hanging string 2 rapidly, so that the tension, pressure resistance and torsion resistance of the hanging string 2 are detected conveniently, the fixing device 5 comprises a U-shaped clamping ring 51 with a rough inner surface, the inner surface of the U-shaped clamping ring 51 is in sliding contact with the outer surface of the hanging string 2, the outer surfaces of the two ends of the U-shaped clamping ring 51 are provided with threaded surfaces 52, the two ends of the hanging string 2 penetrate through the winding device 7 and the traction device 6 respectively, and then the U-shaped clamping ring 51 can clamp the two ends of the hanging string 2, so that the hanging string 2 can be detected.
In order to facilitate quick disassembly and quick assembly of the U-shaped clamping ring 51, meanwhile, the two ends of the hanging string 2 are fixed, the fixing device 5 further comprises a clamping and resisting plate 53, the surface of the clamping and resisting plate 53 is in sliding sleeve joint with the outer surfaces of the two ends of the U-shaped clamping ring 51 through a through-hole, the limiting plates 54 which are fixedly connected with the end faces of the U-shaped clamping ring 51 in a symmetrical mode are arranged on one side surface of the clamping and resisting plate 53, fixing nuts 55 are respectively in threaded sleeve joint with the outer surfaces of the two ends of the U-shaped clamping ring 51, one side surface of the fixing nuts 55 is in sliding contact with one side surface of the clamping and resisting plate 53, when the U-shaped clamping ring 51 is sleeved on the end face of the hanging string 2, the clamping and resisting plate 53 and the U-shaped clamping ring 51 are fixedly connected with the two ends of the hanging string 2 through gradual tightening of the fixing nuts 55, and meanwhile guiding and limiting the clamping and resisting plate 53 are limited through the concave limiting plates 54.
Through setting up fixing device 5, can carry out quick fixation to the both ends of dropper wire 2 to be convenient for carry out anti-fatigue test to it, in the in-process of adjusting, cup joint U type snap ring 51 when the terminal surface of dropper wire 2, cup joint the chucking butt plate 53 that the surface is the rubber material at the terminal surface of U type snap ring 51, and make chucking butt plate 53 and U type snap ring 51 fix the both ends of dropper wire 2 through progressively tightening fixation nut 55, thereby can be convenient for the quick detach fast-assembling to dropper wire 2.
As shown in fig. 6 to 8, in which the pulling device 6 tightens the hanging string 2 fixed at both ends to perform fatigue strength detection.
The lower extreme of the string 2 is connected on the surface of the pulling device 6, in order to tighten and adjust the string 2, thereby the pulling device 6 includes the action cavity 61 that is set up in the inside of digit control machine tool 1 bottom and is L-shaped, the interior roof of action cavity 61 is rectangular array distribution through the bearing and rotates and be connected with the pulling screw 62, the lower extreme of pulling screw 62 extends to the inside of action cavity 61, synchronous rotation is carried out through belt pulley assembly 64 between a plurality of pulling screws 62, thereby control a plurality of pulling screws 62 through belt pulley assembly 64 and carry out synchronous rotation, can pull down the string 2 that its external surface is connected, thereby can realize the tightening of string 2, and belt pulley assembly 64 includes the belt pulley of driving belt and its internal surface cup joint.
In order to drive the pulling screw 62 to rotate and realize the downward pulling action, the pulling device 6 further comprises a driving motor 63 fixedly installed on the inner top wall of the action cavity 61, the outer surface of an output shaft of the driving motor 63 is connected with one end of a belt pulley assembly 64 through a coupler, a pulling tube sleeve 65 is sleeved on the outer surface of the pulling screw 62 in a threaded manner, a pulling pressure sensor 66 which is a U-shaped shell is fixedly connected to the upper surface of the pulling tube sleeve 65, and accordingly the pulling screw 62 is controlled to synchronously rotate through the belt pulley assembly 64 by virtue of the driving motor 63, so that the pulling tube sleeve 65 sleeved on the outer surface of the pulling tube sleeve moves downwards to tighten the plurality of hanging string 2, the pulling force is detected by the pulling pressure sensor 66, excessive tightening of the hanging string 2 can be avoided, and meanwhile, the plurality of hanging string 2 can be controlled to achieve tightening in the same state to be uniformly detected.
In order to connect one end of the string 2 with the surface of the pulling device 6, the pulling device 6 further comprises a pulley roller 67 fixedly connected to the inner surface of the pulling pressure sensor 66, a movable cavity 68 is formed in the roller shaft of the pulley roller 67, holes 69 which are symmetrically distributed are formed in the inner wall of one side of the movable cavity 68 in a penetrating mode, one end of the string 2 penetrates through the holes 69 and is wound on the surface of the pulley roller 67, the plurality of pulley rollers 67 are connected through connecting rods, and accordingly one end of the string 2 penetrates through the holes 69 on one side and is pulled out of the holes 69 on the other side through the movable cavity 68, and one end of the string 2 is fixed through the fixing device 5 after being wound for two circles.
Through setting up the draw gear 6, can make the fixed string 2 in both ends tighten, and then can realize accurate antifatigue test, in the in-process of adjusting, act through driving motor 63, make it control a plurality of draw screw 62 through belt pulley assembly 64 and rotate in step, thereby make its outer surface sheathed traction tube cover 65 move down and tighten a plurality of strings 2, and the dynamics of pulling is detected to the tension pressure sensor 66, and then can avoid string 2 to tighten excessively, also can control a plurality of strings 2 to reach the tightening of same state and unify the detection simultaneously.
As shown in fig. 9 to 10, in which the reeling device 7 reels up the tightened string 2 stepwise, thereby detecting the tensile pull of the string 2.
In order to fix the upper end of the hanging string 2 and gradually wind the upper end of the hanging string 2 to finish tension detection, the winding device 7 comprises a mounting cavity 71 arranged inside two ends of the numerical control machine tool 1, the inner wall of the mounting cavity 71 is rotationally connected with a rotating shaft 72 through a bearing, the other group of belt pulley rollers 67 are uniformly and fixedly connected to the outer surface of the rotating shaft 72 at intervals, the inner bottom wall of the mounting cavity 71 is fixedly connected with a supporting lug 73, the surface of the supporting lug 73 is rotationally connected with the outer surface of the rotating shaft 72, the upper end of the hanging string 2 is fixed through the fixing device 5 by the belt pulley rollers 67 on the rotating shaft 72, the belt pulley rollers 67 on the upper end are driven to rotate through the rotating shaft 72, the tightened hanging string 2 is wound to be stretched, and the tension sensor 66 is pulled in the stretching process to realize tension detection.
In order to control the rotation of the rotating shaft 72, the gear motor 79 is fixedly connected to the inner wall of the installation cavity 71, the outer surface of the output shaft of the gear motor 79 is fixedly connected with the outer surface of one end of the rotating shaft 72 through a coupler, in order to avoid the breakage of the hanging string 2 and the rapid rotation of the rotating shaft 72 to damage detection equipment, the winding device 7 further comprises a ratchet wheel 74 fixedly sleeved on the outer surface of one end of the rotating shaft 72, the inner bottom wall of the installation cavity 71, which is close to one end of the ratchet wheel 74, is fixedly connected with the supporting plate 75, the surface of the supporting plate 75 is rotatably connected with the rotating rod 76, the outer surface of one end of the rotating rod 76 is fixedly sleeved with the pawl 77, the surface of the supporting plate 75 is provided with the tension spring 78 through a connecting column and is fixedly connected with the surface of the pawl 77, and the surface of the pawl 77 is in sliding clamping connection with the outer surface of the ratchet wheel 74, so that when the ratchet wheel 74 is gradually rotated anticlockwise, the ratchet wheel 74 can be clamped on the tooth surface of the ratchet wheel 74, the reverse rotation of the ratchet wheel 74 can be avoided, meanwhile, the elasticity of the ratchet wheel 77 can be kept under the elasticity of the tension spring 78, and the clamping force of the pawl 77 can be kept after the rotating the connecting rod is driven to be separated from the clamping the ratchet 74, and the pulley roller 67.
As shown in fig. 11-13, wherein the pushing device 8 pushes the tightened string 2 horizontally forward to check its pressure resistance.
In order to enable the pushing device 8 to achieve detection of torque and pressure resistance of the hanging string 2, the pushing device 8 comprises ball bearings 81 which are distributed and fixedly connected to the surface of the numerical control machine tool 1 in a rectangular array, pushing cylinders 82 are fixedly connected to the inner surfaces of the inner rings of the ball bearings 81, torque sensors 83 are mounted on the outer surfaces of piston rods of the pushing cylinders 82, guide frames 84 are fixedly connected to one side surfaces of the piston rods of the pushing cylinders 82, the inner surfaces of the guide frames 84 are movably sleeved with the outer surfaces of the hanging string 2, the hanging string 2 penetrates through the guide frames 84 to conduct limit guiding, when torque testing is conducted, the hanging string 2 is pulled backwards through the pushing cylinders 82 to enable the hanging string 2 to be in an angle, further, the plurality of pushing cylinders 82 are controlled to rotate with the aid of the ball bearings 81 through a gear set in the numerical control machine tool 1, therefore the torque sensors 83 can detect twisting of the hanging string 2, when pressure resistance testing is conducted, the hanging string 2 is gradually pushed forwards through the pushing of the guide frames 84, and pressure resistance testing is achieved.
In order to detect the pressure resistance of the hanging string 2, the pushing device 8 further comprises a mounting block 85 which is fixedly connected to one side surface of the supporting connecting plate 3 in a rectangular array mode and provided with a groove, a telescopic block 86 for performing compression adjustment is slidably inserted into the inner wall of the groove of the mounting block 85, a pressure sensor 87 is fixedly connected to one side surface of the telescopic block 86, a buffer spring 88 is mounted on the inner wall of the groove of the mounting block 85, a limit switch 89 and a trigger rod 90 which are sleeved on the inner surface of the buffer spring 88 are fixedly connected to one side surface of the telescopic block 86, so that the plurality of pushing air cylinders 82 synchronously act to push the guide frame 84 to gradually approach the surface of the telescopic block 86 and compress the guide frame, the trigger rod 90 on one side of the telescopic block 86 touches the limit switch 89 under the buffer of the buffer spring 88 to stop the pushing air cylinders 82, and at the moment, the pushing force of the pushing air cylinders 82 is detected through the pressure sensor 87, and whether the pushing pressure is consistent and whether the pressure reaches a preset pressure value or not is judged through a sensor value.
Through setting up coiling mechanism 7, can carry out the rolling step by step to the string 2 of stretching tightly to detect the tensile stretch of string 2, at the in-process of adjusting, drive the belt pulley roller 67 of upper end through pivot 72 and rotate, and then make string 2 of stretching tightly rolling and stretch-draw it, and pull pressure sensor 66 to the in-process of stretching and realize the detection of stretch-draw, and through making articulated pawl 77 joint at the flank of tooth of ratchet 74, and then can avoid the reversal of ratchet 74, can keep the chucking power of pawl 77 through the elasticity of tension spring 78 simultaneously, and then can improve the security that string 2 detected.
Working principle: as shown in fig. 1 to 13, in a specific embodiment of the invention, the same batch of the suspension strings 2 pass through the guide roller 4, the two ends of the suspension strings 2 respectively pass through the perforation 69 of the belt pulley roller 67 and are pulled out from the perforation 69 at the other side through the movable cavity 68, the clamping and resisting plate 53 with the rubber surface is sleeved on the end face of the U-shaped clamping ring 51 after two circles of winding, and the two ends of the suspension strings 2 are fixed by gradually screwing the fixing nuts 55 to enable the clamping and resisting plate 53 and the U-shaped clamping ring 51;
when the string 2 is stretched, the driving motor 63 is used for operating, and the plurality of traction screws 62 are controlled to synchronously rotate through the belt pulley assembly 64, so that the traction tube sleeve 65 sleeved on the outer surface of the traction tube sleeve moves downwards to stretch the plurality of string 2, the traction force is detected by the traction pressure sensor 66, the string 2 can be prevented from being excessively stretched, and the strings 2 can be controlled to be stretched in the same state;
the stretch-draw property, the pressure resistance and the torque property of the hanging string 2 are synchronously carried out at intervals of the numerical control machine tool 1;
during tension detection, the rotating shaft 72 is controlled by the reducing motor 79 arranged on the inner wall of the mounting cavity 71 to drive the plurality of belt pulley rollers 67 to rotate step by step, so that the hinged pawl 77 is clamped on the tooth surface of the ratchet wheel 74, further the reverse rotation of the ratchet wheel 74 can be avoided, meanwhile, the clamping force of the pawl 77 can be kept through the elastic force of the tension spring 78, further the tightened string 2 is wound and tensioned, and the tension detection is realized by pulling the tension pressure sensor 66 in the tensioning process;
when torque test is carried out, the lifting string 2 is pulled backwards by the pushing cylinder 82 to form an angle, and then the plurality of pushing cylinders 82 are controlled to rotate in the numerical control machine tool 1 under the assistance of the ball bearings 81 through a gear set, so that the torque sensor 83 can detect the twisting of the lifting string 2;
when pressure resistance detection is performed, the pushing air cylinder 82 is used for acting, the guide frame 84 is gradually pushed forward to bend the hanging string 2, the guide frame 84 is gradually close to the surface of the telescopic block 86 and compresses the same, the trigger rod 90 on one side of the telescopic block 86 is contacted with the limit switch 89 under the buffer of the buffer spring 88 to stop the pushing air cylinder 82, at the moment, the pushing force of the pushing air cylinder 82 is detected through the pressure sensor 87, whether the pushing pressure is consistent or not and whether the pressure reaches a preset pressure value or not is judged through a sensor value, and if the pressure value is smaller than the preset value, the pressure resistance of the hanging string 2 is insufficient.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides an integrated detection device of electrified railway dropper fatigue strength, includes digit control machine tool (1) and the dropper (2) of waiting to detect that are used for integrating spare part, its characterized in that: the inner surface of the numerical control machine tool (1) is fixedly connected with a supporting connecting plate (3), guide rollers (4) distributed in a rectangular array are arranged on the surface of the numerical control machine tool (1) through connecting shafts, the inner surfaces of the guide rollers (4) are in sliding contact with the outer surfaces of the hanging strings (2), fixing devices (5) are arranged at two ends of the hanging strings (2), a winding device (7) is arranged on the inner surface of the upper end of the numerical control machine tool (1), a traction device (6) is arranged on the inner surface of the lower end of the numerical control machine tool (1), and a pushing device (8) is arranged on the inner surface of the middle end of the numerical control machine tool (1);
wherein, the fixing device (5) fixedly connects the two ends of the hanging string (2) on the surfaces of the winding device (7) and the traction device (6);
wherein the traction device (6) tightens the hanging string (2) with two fixed ends;
the traction device (6) comprises an L-shaped action cavity (61) arranged in the bottom end of the numerical control machine tool (1), wherein the inner top wall of the action cavity (61) is rotationally connected with traction screws (62) in a rectangular array distribution through bearings, the lower ends of the traction screws (62) extend to the inside of the action cavity (61), and a plurality of traction screws (62) synchronously rotate through belt pulley assemblies (64);
the traction device (6) further comprises a driving motor (63) fixedly installed on the inner top wall of the action cavity (61), the outer surface of an output shaft of the driving motor (63) is connected with one end of the belt pulley assembly (64) through a coupler, a traction pipe sleeve (65) is sleeved on the outer surface of the traction screw (62) in a threaded manner, and a traction pressure sensor (66) which is a U-shaped shell is fixedly connected to the upper surface of the traction pipe sleeve (65);
the traction device (6) further comprises a belt pulley roller (67) fixedly connected to the inner surface of the traction pressure sensor (66), a movable cavity (68) is formed in the roller shaft of the belt pulley roller (67), holes (69) which are symmetrically distributed are formed in the inner wall of one side of the movable cavity (68) in a penetrating mode, one end of the hanging string (2) penetrates through the holes (69) and is wound on the surface of the belt pulley roller (67), and a plurality of belt pulley rollers (67) are connected through connecting rods;
the winding device (7) winds the tightened hanging string (2) step by step;
the winding device (7) comprises mounting cavities (71) arranged inside two ends of the numerical control machine tool (1), the inner walls of the mounting cavities (71) are rotatably connected with rotating shafts (72) through bearings, the other groups of belt pulley rollers (67) are uniformly and fixedly connected to the outer surfaces of the rotating shafts (72) at intervals, the inner bottom walls of the mounting cavities (71) are fixedly connected with supporting lug plates (73), and the surfaces of the supporting lug plates (73) are rotatably connected with the outer surfaces of the rotating shafts (72);
the winding device (7) further comprises a ratchet wheel (74) fixedly sleeved on the outer surface of one end of the rotating shaft (72), the inner bottom wall, close to one end of the ratchet wheel (74), of the mounting cavity (71) is fixedly connected with a supporting plate (75), the surface of the supporting plate (75) is rotationally connected with a rotating rod (76), one end outer surface of the rotating rod (76) is fixedly sleeved with a pawl (77), the surface of the supporting plate (75) is provided with a tension spring (78) through a connecting column and is fixedly connected with the surface of the pawl (77), the surface of the pawl (77) is in sliding clamping connection with the outer surface of the ratchet wheel (74), the inner wall of the mounting cavity (71) is fixedly connected with a speed reducing motor (79), and the outer surface of an output shaft of the speed reducing motor (79) is fixedly connected with the outer surface of one end of the rotating shaft (72) through a coupler;
wherein the pushing device (8) pushes the tightened dropper wire (2) horizontally forwards;
the pushing device (8) comprises ball bearings (81) which are distributed in a rectangular array and fixedly connected to the surface of the numerical control machine tool (1), pushing cylinders (82) are fixedly connected to the inner surfaces of inner rings of the ball bearings (81), torque sensors (83) are mounted on the outer surfaces of piston rods of the pushing cylinders (82), guide frames (84) are fixedly connected to one side of each piston rod of each pushing cylinder (82), and the inner surfaces of the guide frames (84) are movably sleeved on the outer surfaces of the hanging strings (2).
2. The integrated detection device for fatigue strength of an electrified railway dropper according to claim 1, wherein: the fixing device (5) comprises a U-shaped clamping ring (51) with a rough inner surface, the inner surface of the U-shaped clamping ring (51) is in sliding contact with the outer surface of the hanging string (2), and threaded surfaces (52) are formed on the outer surfaces of two ends of the U-shaped clamping ring (51).
3. The integrated detection device for fatigue strength of electrified railway hanger according to claim 2, wherein: fixing device (5) still include chucking butt plate (53), the surface of chucking butt plate (53) through run through the smooth hole of seting up with the both ends surface slip cup joint of U type snap ring (51), one side surface of chucking butt plate (53) is symmetric distribution fixedly connected with and wraps limiting plate (54) of U type snap ring (51) terminal surface, the both ends surface of U type snap ring (51) has threaded socket joint fixation nut (55) respectively, one side surface of fixation nut (55) with one side surface sliding contact of chucking butt plate (53).
4. The integrated detection device for fatigue strength of an electrified railway dropper according to claim 1, wherein: the pushing device is characterized in that the pushing device (8) further comprises a mounting block (85) which is fixedly connected to one side surface of the supporting connecting plate (3) in a rectangular array mode and provided with a groove, a telescopic block (86) for compression adjustment is slidably inserted into the inner wall of the groove of the mounting block (85), a pressure and voltage sensor (87) is fixedly connected to one side surface of the telescopic block (86), a buffer spring (88) is mounted on the inner wall of the groove of the mounting block (85), and a limit switch (89) and a trigger rod (90) which are sleeved on the inner surface of the buffer spring (88) are fixedly connected to one side surface of the telescopic block (86).
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| KR20150014588A (en) * | 2013-07-30 | 2015-02-09 | 한국철도기술연구원 | Apparatus for testing vibration fatigue life of electric railway dropper |
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| CN116879077A (en) | 2023-10-13 |
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