WO2017088602A1 - 一种制动梁疲劳试验台 - Google Patents
一种制动梁疲劳试验台 Download PDFInfo
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- WO2017088602A1 WO2017088602A1 PCT/CN2016/102117 CN2016102117W WO2017088602A1 WO 2017088602 A1 WO2017088602 A1 WO 2017088602A1 CN 2016102117 W CN2016102117 W CN 2016102117W WO 2017088602 A1 WO2017088602 A1 WO 2017088602A1
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- brake
- column
- load
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- tangential
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000004088 simulation Methods 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims description 38
- 238000009434 installation Methods 0.000 description 11
- 230000008030 elimination Effects 0.000 description 9
- 238000003379 elimination reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- 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
Definitions
- the invention belongs to the technical field of rail transit, and in particular relates to a fatigue test bench for a brake beam of a railway freight car.
- the railway truck brake beam is the most important part of the railway truck's basic braking device.
- the brake beam can transmit the braking force generated by the brake cylinder to the brake shoe, thereby realizing the vehicle braking.
- 1 is a schematic structural view of a brake beam 6.
- the brake beam 6 is a triangular beam-like beam including a horizontal crossbar 61, and a diagonal rod 62 disposed at both end ends of the crossbar 61.
- the inclined rod 62 is inclined downward.
- a beam strut 63 is vertically disposed between the point and the crossbar 61, and the mounting direction of the brake beam 6 is horizontal when it is in normal use.
- the two ends of the brake beam crossbar 61 respectively pass through the intermediate mounting holes of the two brake shoe brackets and are respectively installed in the On the brake shoe, the brake shoe and the simulated brake shoe are installed on the simulated wheel pair.
- the matching of the simulated brake shoe and the simulated wheel tread should be in accordance with the actual situation.
- the simulated brake shoe and brake shoe and the simulated brake shoe and the simulated wheel are The installation is firm to ensure that it does not slide during the loading process.
- the simulated wheel should have the freedom to rotate around its axis, and the degree of freedom of the line of the brake beam end along the tangential direction of the simulated wheel tread is constrained; after the brake beam is installed, The brake beam simultaneously applies two loads of pressure and tangential force, wherein the pressure load acts on the pin hole of the beam support, and the variation range is 0 ⁇ 104.5kN; the tangential load generates a variation range between the simulated wheel tread and the two simulated brake shoes. -43.7kN to 43.7kN.
- the existing brake beam fatigue test bench has three forms, one is the lateral installation mode of the brake beam.
- the brake beam is placed on the test bench in the same direction as the actual operation, the method can only be used once.
- the fatigue test of a brake beam is carried out, and the test efficiency is low.
- the second type is the lateral placement of the brake beam.
- This method can test two brake beams at the same time, applying a pressure load by a transverse actuator, and a vertical actuator. Applying a tangential load, but the test bench occupies a large space, and the test rig needs to be separately in the lateral and vertical directions.
- the third type is the gantry form.
- the brake beams of this type are vertically placed, and two test tubes can be tested simultaneously.
- the root brake beam, pressure load and tangential load are applied by the vertical actuator.
- the overall structural rigidity of the test bench is too small, and large deformation will occur during the fatigue test loading process, which will affect the test load frequency and test efficiency.
- the current test loading frequency is up to 2.3HZ; the strength of the test gantry is small, and the gantry structure body is prone to fatigue cracks; the gap between the test rig and the tested brake beam connection is too much and difficult to adjust.
- the application provides a brake beam fatigue test bench.
- the brake beam fatigue test bench adopts a gantry structure with diagonal bracing, which can improve the vertical and lateral stiffness of the test bench, and the deformation is small during the test, thereby improving
- the test loading frequency of the test bench improves the test efficiency.
- a brake beam fatigue test bench for simultaneously testing the fatigue strength of two brake beams comprising a base, and four uprights perpendicular to the base and spaced above the base, the four uprights from the left side of the base
- the right side of the base is a first column, a second column, a third column and a fourth column, wherein a first tangential force load capable of applying a tangential force load is vertically mounted between the first column and the second column.
- a first tangential force load actuator is mounted with a simulated wheel on the front and rear sides of the bottom of the actuator; a pressure load actuator capable of applying a pressure load is vertically mounted between the second column and the third column; the third column and A second tangential force load actuator capable of applying a tangential force load is vertically mounted between the fourth uprights, and a simulated wheel is mounted on the front and rear sides of the bottom of the second tangential force load actuator, the second tangential force
- the load actuator and the first tangential force load actuator are symmetrically arranged centering on the pressure load actuator; the two brake beams are vertically mounted on the front side and the rear side of the column, and the two ends of the brake beam are supported at Simulate the wheel tread.
- the first tangential force load actuator and the bottom of the second tangential force load actuator are provided with a tangential load distribution beam capable of receiving a tangential load, and the tangential load distribution beam is perpendicular to the front and rear of the column Horizontal setting; the two ends of the tangential load distribution beam are respectively connected to the simulated wheels disposed on the front and rear sides of the column to distribute the tangential load to the simulated wheels standing on both sides of the tangential force load actuator.
- the simulated wheel is a drum type
- the upper and lower circular arc surfaces of the drum type simulation wheel are circular treads of different diameters to simulate two different diameter wheels on the same simulated wheel.
- the front and rear sides of the simulated wheel are provided with a baffle plate, and a connecting beam that can be installed with the tangential load distribution beam is installed in the baffle, and the connecting beam is fixed by the wedge.
- the tread surface of the simulated wheel is provided with an analog brake shoe matched with the curvature of the tread surface, the brake shoe is arranged on the simulated brake shoe, and a gap eliminating device is arranged between the analog wheel and the brake shoe to eliminate the brake shoe support The gap between the wheel and the analog wheel.
- the bottom of the pressure load actuator is provided with a pressure load distribution beam that can distribute a pressure load
- the pressure load distribution beam is horizontally disposed perpendicular to the front and rear of the column, wherein the brake load distribution beam is installed with brakes at both ends thereof.
- the strut round pin of the beam strut, the beam strut of the brake beam is mounted on the strut round pin to receive the pressure load distributed by the pressure load actuator.
- a U-shaped connecting block is disposed at both ends of the pressure load distribution beam, and an inverted V-shaped strut connecting block is disposed above each U-shaped connecting block, and both ends of the U-shaped connecting block are connected to both ends of the strut connecting block,
- a strut round pin is arranged on the strut connecting block; the strut round pin is used to fix the beam strut of the brake beam in a vertical state, and the pressure load is transmitted to the brake beam.
- the bottom of the first tangential force load actuator is provided with a feedback device that can perform a feedback test on the tangential load, and the feedback device includes a sensor that can sense the magnitude of the tangential load feedback force.
- the front and rear sides of the column are obliquely provided with diagonal braces.
- the brake girder fatigue test bench is provided with an analog chute, and both ends of the brake beam pass through the brake shoe in the simulation chute.
- the guide sleeves at both ends of the brake beam are located in the simulated chute.
- the guide bushes at both ends of the simulation chute and the brake beam are all prior art, and will not be described herein.
- the bracing comprises a first set of diagonal braces before and after the first upright and a second set of diagonal braces located before and after the fourth upright; the simulated chute is located between the first upright and the first set of diagonal braces On the bracket or on the bracket between the fourth upright and the second set of diagonal stays.
- an escalator is disposed on a left side of the first pillar and a right side of the fourth pillar.
- the top of the column is horizontally provided with a walking platform.
- a gap eliminating device can be used for eliminating the gap between the simulated wheel and the brake shoe when the above-mentioned brake beam fatigue table test is performed, and the device comprises a connecting block connecting the analog wheel and the brake shoe, the top of the connecting block is The trapezoidal end of the brake shoe is matched with a trapezoidal end, the two sides of the trapezoidal end are sloped surfaces, and the inclined surface is provided with an open slot, and the opening slot is matched with an adjusting block movable in the open slot, and the moving adjustment block is The position in the open slot is to eliminate the gap between the top side of the connecting block and the brake shoe.
- a convex surface is disposed on an inner surface of the adjusting block, and a slope direction of the slope surface is opposite to a slope direction of an inner surface of the adjusting block. It is especially preferred that the slope direction of the open groove is opposite to the slope direction of the projection, and the two work together to eliminate the gap.
- the opening groove is disposed along the slope direction of the slope surface, the opening groove is a semi-circular groove, and the adjustment block is provided with a semi-cylindrical protrusion matching the opening groove.
- one side of the trapezoidal end of the connecting block is provided with an adjusting plate for preventing the adjusting block from loosening, and the connecting block and the adjusting plate are connected by bolts.
- two opening slots are formed on each slope surface of the connecting block to increase the contact area between the gap eliminating device and the brake shoe.
- the top end surface of the connecting block is an inclined surface that coincides with the brake shoe mounting surface.
- the brake beam fatigue test bench of the present application adopts the layout of the gantry frame with the external bracing, which greatly improves the vertical and lateral stiffness of the test bench, and has small deformation during the test, which improves the test loading frequency of the test bench and improves Test efficiency; at the same time, it has greater strength and less stress during the test, which can greatly improve the fatigue life of the test bench structure body and increase the service life of the test bench;
- the brake beam fatigue test bench of the present application is provided with wheels of different diameters on both sides of the simulated wheel, and can simultaneously simulate two different diameter wheels. When replacing different types of test pieces, it is not necessary to disassemble the simulated wheels of different diameters. Simply rotate the analog wheel to achieve analog wheel replacement of different diameters, which is simple and convenient;
- the brake beam fatigue test bench of the present application has a clear transmission path of the pressure load and the tangential load; since the tangential load feedback device is adopted, the tangential load after the transfer is applied to the brake beam. After that, its value can be verified. The tester can timely adjust the load applied to the actuator or the structure of the test bench to ensure the accuracy of the test results;
- the brake beam fatigue test bench of the present application provides a gap eliminating device between the brake shoe and the simulated wheel to improve the test loading frequency and improve the reliability of the test result;
- the gap eliminating device in the fatigue test bed of the brake beam adopts the connecting block with the open slot of the slope and the adjusting block with the opposite slope to work together to eliminate the gap, and realizes the stepless adjustment of the position of the adjusting block; The role of transmitting loads;
- the gap elimination device in the fatigue test bed of the brake beam, the upper and lower two adjustment blocks are arranged on each side of the connection block to increase the area of the back plane of the adjustment block and the trapezoidal groove of the brake shoe, which can be better. It acts as a constraint and achieves the role of transmitting loads.
- the gap elimination device in the fatigue test bed of the brake beam adopts a cylindrical fit between the connection block and the adjustment block, so that the cylindrical adjustment block has a certain degree of rotational freedom, thereby adapting to the manufacturing tolerance of the brake shoe trapezoidal groove. Irregular and fit with it;
- the adjustment block is installed at the end of the connection block, and the adjustment block after the gap adjustment can be fixed, thereby avoiding the accidental sliding of the adjustment block caused by the vibration.
- Figure 1 is a schematic view showing the structure of a brake beam
- Figure 2 is a front view of the brake beam fatigue test rig
- Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
- Figure 4 is a schematic view of tangential load distribution
- Figure 5 is a schematic view of pressure load distribution
- Figure 6 is a schematic structural view of a brake shoe holder
- Figure 7 is a schematic structural view of a brake shoe
- Figure 8 is a front elevational view of the gap eliminating device
- Figure 9 is a side view showing a part of the structure of the gap eliminating device.
- Figure 10 is a side view of the connecting block
- Figure 11 is a front view of the connection block.
- FIGS. 3-7, 9 and 10 can be regarded as being consistent.
- the terms “first”, “second”, “third”, and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
- Figure 2 is a front elevational view of the brake beam fatigue test rig of the present application.
- a brake beam fatigue test bench for simultaneously testing the fatigue strength of two brake beams including a base 1, and four uprights perpendicular to the base 1 and spaced above the base 1, the four uprights from the base 1 left
- the square to the right of the base 1 is a first upright 81, a second upright 82, a third upright 83, and a fourth upright 84.
- first upright 81 and a first tangential force load actuator 3 capable of applying a tangential force load is vertically mounted between the second uprights 82, and the simulated wheel 2 is symmetrically mounted on the front and rear sides of the bottom of the first tangential force load actuator 3;
- a pressure can be applied between the second column 82 and the third column 83 a load-bearing pressure load actuator 5;
- a second tangential force load actuator 4 capable of applying a tangential force load is vertically mounted between the third upright 83 and the fourth upright 84, and the second tangential force load is actuated
- the simulated wheel 2 is symmetrically mounted on the front and rear sides of the bottom of the device 4, and the second tangential force load actuator 4 and the first tangential force load actuator 3 are symmetrically arranged centering on the pressure load actuator 5;
- the moving beams 6 are vertically mounted on the front side and the rear side of the column, respectively.
- the simulated brake shoe 21 is mounted on the simulated wheel 2, and the brake shoe 10 is disposed on the simulated brake shoe 21; the brake beam 6 is disposed on the simulated brake shoe 21 by means of the brake shoe 10 .
- the vertical structure of the above structure is arranged perpendicular to the ground.
- the vertical stiffness of the fatigue test bench of the brake beam is larger than the vertical stiffness of the two column structures in the prior art, which is more conducive to increasing the loading frequency.
- the first tangential force load actuator 3 and the bottom of the second tangential force load actuator 4 are each provided with a tangential load distribution beam 24 that can receive a tangential load.
- the tangential load distribution beam 24 is disposed perpendicular to the column and horizontally before and after; the two ends of the tangential load distribution beam 24 are respectively connected to the simulated wheel 2 disposed on the front and rear sides of the column to distribute the tangential load to the tangential force load.
- the simulated wheels 2 on both sides of the actuator as an embodiment, the simulated wheels 2 are symmetrically arranged such that the tangential load distribution beams 24 are evenly distributed to both ends after being stressed.
- the tangential load is applied to the circumferential tangential direction of the tread radius of the simulated wheel 2, and round pins are provided at the horizontal radius of the simulated wheel 2, respectively connecting the ends of the tangential load distribution beam 24.
- the simulated wheel 2 in the present application is preferably a drum type, that is, it includes two end faces that are oppositely disposed vertically, and two ends of the connection.
- the two circular arc faces of the end face are placed on the arc surface of the simulated wheel 2 when the simulated wheel 2 is mounted, and the upper and lower circular arc faces of the drum-shaped simulated wheel are circular treads of different diameters, so that When it is necessary to simulate wheels of different diameters, it is only necessary to rotate a certain angle to simulate two different diameter wheels on the same simulated wheel.
- the front and rear baffles of the simulated wheel 2 (located inside the simulated wheel, not shown) are mounted with a connecting beam 23 mountable to the tangential load distribution beam 24, and wedges are mounted. 231 fixes the connecting beam 23.
- the simulated brake wheel 21 is provided with a simulated brake shoe 21 matched with the tread curvature, and the brake shoe brake shoe 10 is disposed on the simulated brake shoe 21, and a trapezoidal gap eliminating device is disposed between the brake shoe 10 and the simulated wheel 2. 22, to eliminate the gap between the brake shoe 10 and the simulated wheel 2.
- the analog wheel 2 is provided with a U-shaped groove 25 for placing the lower portion of the gap eliminating device 22; at this time, in order to facilitate the placement of the gap eliminating device 22, the tile back 211 of the simulated brake shoe 21 is The removal, that is, the simulated brake shoe 21 is a segmented tile, the upper portion of the gap eliminating device 22 is located in the trapezoidal groove of the brake shoe 10, and the lower portion is located in the U-shaped groove 25.
- the simulated wheel 2 in the present application can be made by welding steel plates, the center hole is made of round steel car, and the web is simulated by two 16mm steel plates. Since only the tread surface of the contact part of the simulated brake shoe 21 is used, the wheel 2 will be simulated. It is made into a drum type, a part of the circumference is removed to arrange the tangential load application point, and a U-shaped groove 25 is opened to connect the simulated wheel with the brake beam brake shoe through the gap eliminating device.
- the brake beam 6 is matched with the simulated wheel tread, and the cross bar 61 is not linear, but forms a slope of 1:20, so that the brake shoe mounting surface also produces a slope of 1:20, therefore, the present application
- the simulated wheel tread portion has a taper of 1:20, so that after the brake shoe 10 is mounted with the simulated brake shoe 21, the simulated brake shoe 21 forms a gap-free fit with the simulated wheel 2.
- the upper surface and the lower surface of the simulated brake shoe 21 are respectively a cylindrical surface and a conical surface that can be matched with the simulated wheel 2 and the brake shoe.
- FIG. 5 is a schematic illustration of pressure load distribution in the present application.
- the bottom of the pressure load actuator 5 is provided with a pressure load distribution beam 51 that can distribute a pressure load.
- the pressure load distribution beam 51 is disposed perpendicular to the column and horizontally before and after, and the brake load distribution beam 51 is mounted with brakes at both ends thereof.
- the strut round pin 52 of the beam strut 63, the beam strut 63 of the brake beam is mounted on the strut round pin 52 to receive the pressure load distributed by the pressure load actuator 5.
- the pressure load distribution beam 51 is equipped with a pressure load.
- the pressure load distribution beam 51 is perpendicular to the column and horizontally disposed.
- the U-shaped connection block 53 is symmetrically disposed at both ends of the pressure load distribution beam 5, and the inverted V-shaped portion is disposed above the U-shaped connection block 53.
- the pillar connecting block 54 is connected at both ends of the U-shaped connecting block 53 to both ends of the pillar connecting block 54.
- the pillar connecting block 54 is provided with a pillar round pin 52.
- the beam stay 63 of the brake beam is mounted on the pillar round pin 52, and is in a vertical state. .
- the pressure load actuator 5 uniformly applies the load to the beam strut 63 of the two brake beams through the pressure load distribution beam 51, and the two ends of the pressure load distribution beam 51 are respectively connected to the strut round pin 52;
- the maximum load of the pressure load actuator 5 is twice the specified pressure load.
- the bottom of the first tangential force load actuator 3 is provided with a feedback device 7 capable of feedback testing the tangential load, the feedback device 7 including an inductive tangential direction A sensor that measures the magnitude of the load.
- the front and rear sides of the column may be obliquely provided with the diagonal stay 11.
- the left side of the first pillar 81 and the right side of the fourth pillar 84 are provided with an escalator for the user to walk; the top of the pillar is horizontally provided with a walking platform to facilitate inspection and installation of the structure in the present application.
- the brake shoe for a vehicle is mounted on the brake shoe 10, and the brake shoe and the brake shoe 10 are connected by a brake shoe pin, and the brake shoe is located inside the brake shoe 10; as shown in FIG.
- the tile has an outwardly protruding trapezoidal tile back 211; as shown in FIG. 6, the bottom of the brake shoe 10 is provided with a concave trapezoidal groove 101 which can match the tile back 211 of the brake shoe 21, that is, the tile back 211 and the trapezoid
- the connection portion between the grooves 101 is trapezoidal.
- the tile back 211 of the simulated brake shoe 21 used in the embodiment is removed, that is, the simulated brake shoe 21 is Two separate brake shoes; the simulated brake shoe 21 is located on the inner side of the brake shoe 10, and is also located in the brake shoe 10 and the die Between the wheel 2, a gap eliminating device 22 is arranged between the brake shoe 10 and the simulated wheel 2; to ensure the test loading frequency and to avoid additional impact force in the test.
- the gap eliminating device 22 in the figure can be used to eliminate the gap between the simulated wheel 2 and the brake shoe 10 during the test of the brake beam fatigue test bench, including the connecting block 222 for connecting the simulated wheel 2 and the brake shoe 10, and the connecting block.
- the top of the 222 is a trapezoidal end 2223 matching the trapezoidal groove 101 of the brake shoe 10, and the two sides of the trapezoidal end 2223 are sloped surfaces 2224 (as shown in FIG. 10), and the sloped surface 2224 is provided with an opening groove 2221.
- the opening groove 2221 is matched with an adjusting block 223 movable in the opening groove 2221, and the position of the movement adjusting block 223 in the opening groove 2221 is eliminated to eliminate the gap between the top side of the connecting block and the brake shoe 10, that is, the slope surface 2224 A gap with the trapezoidal groove 101 of the brake shoe.
- the upper portion of the connection block 222 is a trapezoidal end 2223 that matches the trapezoidal groove 101 of the brake shoe 10, as shown in FIGS.
- the opening groove 2221 is disposed along the slope direction of the trapezoidal end slope surface 2224, preferably extends through the front and rear end faces of the connecting block 222, and the opening groove 2221 is a semi-circular groove; the adjusting block 223 is provided with the opening groove 2221 matched semi-cylindrical projection 2231.
- the thickness of the adjusting block 223 decreases inward from the surface of the trapezoidal end 2223, and the changing slope is opposite to the slope surface 2224.
- FIG. 9 shows a state in which the thickness of the adjusting block 223 is thinned from front to back; thus, When the gap is eliminated, the position of the adjusting block 223 is adjusted such that the protrusion 2231 moves inward along the opening groove 2221, and a position can always be found such that the outer side of the adjusting block 223 is parallel and in contact with the side surface of the brake shoe trapezoidal groove 101; Similar to wedges.
- the above-mentioned opening groove 2221 and the protrusion 2231 are preferably semi-circular in that the contact of the curved surface has a certain degree of rotational freedom when the position is adjusted, and is more rotatable, and is adapted to the slope of the contact surface due to different tolerances. .
- an adjustment plate 221 (shown in FIG. 8) for preventing the adjustment block 223 from being loosened is mounted on the trapezoidal end 2223 side, and the connection block 222 is
- the adjusting plate 221 is fixedly connected to each other, preferably by bolts.
- the adjusting plate 221 is provided with an adjusting bolt 224.
- the adjusting bolt 224 is located at one side of the adjusting block 223.
- the adjusting block 223 is moved along the opening slot 2221.
- the adjustment block 223 adjusted in place is pressed by the adjusting bolt 224 to prevent the turbulence of the adjusting block 223 due to vibration during the test.
- the mounting hole 2222 is formed on the end surface of the connecting block 222, which is easily conceivable by those skilled in the art, and will not be described herein.
- the number of the opening slots 2221 formed on each side of the connecting block 222 is two. Accordingly, the number of the adjusting blocks 223 is correspondingly increased, which is advantageous in that the adjusting block 223 can be added. In the area in contact with the brake shoe trapezoidal groove 101, the brake shoe 10 and the simulated wheel 2 can be better restrained and transmitted.
- the slope of the mounting surface of the brake shoe 10 is generally 1:20.
- the top end surface of the connection block 222 is set to be the same with the brake shoe 10 An inclined surface with the same mounting surface.
- the tread surface of the simulated wheel 2 is slotted and embedded in the connecting block 222; the simulated brake shoe 21 (without the tile back 211) is mounted to the simulated wheel tread by welding or bolt pressing; the analog brake
- the brake beam brake shoe 10 is mounted on the upper side of the shoe 21, the upper portion of the connection block 222 is installed in the trapezoidal groove 101 of the brake shoe holder, the lower portion of the connection block 222 is installed in the U-shaped groove 25, and the adjustment block 223 is mounted on the connection block 222.
- the adjusting plate 221 is fixedly mounted, and then the adjusting block 224 is continuously adjusted to facilitate the adjusting block 223 and The sealing of the brake shoe trapezoidal groove 101, or to be attached, is used for fixing between the two.
- the pressure load actuator 5 is stowed, and the pressure load load beam can be slightly jacked up with two jacks to facilitate the installation of the brake beam 6;
- the inner side of the crossbar 62 is brought into contact with the positioning rod by fine adjustment, and the beam stay 63 remains vertically and is located above the pressure load distribution beam 24 (if necessary) Plumb), the brake shoes on both sides are attached to the curved surface of the simulated brake shoe 21, and the brake beam 6 is positioned but not fixed;
- the jacks can be lowered and removed. If fine adjustment is required during the installation process, the gap elimination device 22 needs to be loosened and then adjusted;
- the beam stay 63 is in a vertical state.
- the load applied by the brake beam 6 is the pressure load and the tangential load.
- the load is ultimately transmitted to the simulated wheel 2 such that the simulated wheel 2 is subjected to vertical downward loads and torques that are simulated by the support of the wheel 2 and the reaction force provided by the simulated chute Balance; the torque caused by the tangential load is also balanced by the reaction force provided by the simulated chute.
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Description
Claims (12)
- 一种制动梁疲劳试验台,用于同时试验两根制动梁的疲劳强度,其特征在于:包括底座(1),以及垂直于底座(1)并间隔设置在底座(1)上方的四根立柱,所述四根立柱自底座左方至底座右方依次为第一立柱(81)、第二立柱(82)、第三立柱(83)以及第四立柱(84),其中,第一立柱(81)与第二立柱(82)之间垂向安装有可施加切向力载荷的第一切向力载荷作动器(3),第一切向力载荷作动器(3)底部的前后两侧安装有模拟车轮(2);第二立柱(82)与第三立柱(83)之间垂向安装有可施加压力载荷的压力载荷作动器(5);第三立柱(83)与第四立柱(84)之间垂向安装有可施加切向力载荷的第二切向力载荷作动器(4),第二切向力载荷作动器(4)底部的前后两侧安装有模拟车轮(2),第二切向力载荷作动器(4)与第一切向力载荷作动器(3)以压力载荷作动器(5)为中心对称设置;两根制动梁(6)竖直安装于立柱的前侧以及后侧,制动梁(6)的两端支撑于模拟车轮(2)踏面上。
- 根据权利要求1所述制动梁疲劳试验台,其特征在于:第一切向力载荷作动器(3)以及第二切向力载荷作动器(4)的底部均设置有可接收切向载荷的切向载荷分配梁(24),切向载荷分配梁(24)垂直于立柱前后水平设置;切向载荷分配梁(24)的两端分别连接设置于立柱前后侧的模拟车轮(2),以将切向载荷分配至分立于切向力载荷作动器两侧的模拟车轮(2)上。
- 根据权利要求2所述制动梁疲劳试验台,其特征在于:模拟车轮(2)为鼓型,该鼓型模拟车轮的上下两段圆弧面为直径不等的圆弧踏面,以在同一模拟车轮上模拟两种不同直径的车轮。
- 根据权利要求3所述制动梁疲劳试验台,其特征在于:模拟车轮(2)的前、后设置有挡板,挡板中安装有可与切向载荷分配梁安装的连接梁(23), 并用楔块(231)对连接梁(23)进行固定。
- 根据权利要求1-4任一所述制动梁疲劳试验台,其特征在于:模拟车轮(2)的踏面上设置有与踏面弧度相匹配的模拟闸瓦(21),模拟闸瓦(21)上设置闸瓦托(10),闸瓦托(10)与模拟车轮(2)之间设置有间隙消除装置(22),以消除闸瓦托(10)与模拟车轮(2)之间的间隙。
- 根据权利要求1-4任一所述制动梁疲劳试验台,其特征在于:压力载荷作动器(5)的底部设置有可分配压力载荷的压力载荷分配梁(51),压力载荷分配梁(51)垂直于立柱前后水平设置,其中,压力载荷分配梁(51)的两端安装有可安装制动梁支柱(63)的支柱圆销(52),制动梁的支柱安装在支柱圆销上,以接收压力载荷作动器分配的压力载荷。
- 根据权利要求6所述制动梁疲劳试验台,其特征在于:所述压力载荷分配梁(51)的两端均设置U型连接块(53),每个U型连接块(53)上方均设置倒V型的支柱连接块(54),U型连接块(53)两端连接支柱连接块(54)的两端,支柱连接块(54)上设置支柱圆销(52);支柱圆销(52)用于固定制动梁的梁支柱(63)呈垂直状态,并将压力载荷传给制动梁(6)。
- 根据权利要求1-4任一所述制动梁疲劳试验台,其特征在于:第一切向力载荷作动器(3)的底部设置有可对切向载荷进行反馈测试的反馈装置(7),该反馈装置(7)包括可感应切向载荷反馈力大小的传感器。
- 根据权利要求5所述制动梁疲劳试验台,其特征在于:所述间隙消除装置(22)包括可连接模拟车轮(2)与闸瓦托(10)的连接块(222),连接块(222)的顶部为与闸瓦托上梯形槽(101)相匹配的梯形端(2223);所述梯形端(2223)的两侧坡度面(2224)上开设有开口槽(2221),开口槽(2221)内匹配有可在开口槽(2221)内移动的调整块(223),移动调整块(223)在开口槽(2221)内的位置,以消除连接块顶部侧面与闸瓦托(10)之间的间隙。
- 根据权利要求9所述制动梁疲劳试验台,其特征在于:所述调整块(223)的内面上设置凸起(2231),所述坡度面(2224)的坡度方向与调整块内面的坡 度方向相反。
- 根据权利要求9或10所述制动梁疲劳试验台,其特征在于:开口槽(2221)沿梯形端坡度面(2224)的坡度方向设置,开口槽(2221)为半圆弧形凹槽,调整块(223)上设置有与开口槽(2221)相匹配的半圆柱形凸起(2231)。
- 根据权利要求9或10所述制动梁疲劳试验台,其特征在于:连接块上梯形端(2223)一侧安装有可防止调整块(223)松动的调整板(221),连接块(222)与调整板(221)之间通过螺栓连接。
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AU2016359767A AU2016359767B2 (en) | 2016-05-18 | 2016-10-14 | Brake beam fatigue test bench |
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US15/546,274 US10088387B2 (en) | 2016-05-18 | 2016-10-14 | Brake beam fatigue test stand |
JP2017538683A JP6329325B2 (ja) | 2016-05-18 | 2016-10-14 | ブレーキ梁の疲労試験スタンド |
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EP3222984A4 (en) | 2017-11-29 |
AU2016359767A1 (en) | 2017-12-07 |
US20180017465A1 (en) | 2018-01-18 |
EP3222984A1 (en) | 2017-09-27 |
JP2018511033A (ja) | 2018-04-19 |
JP6329325B2 (ja) | 2018-05-23 |
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RU2653559C1 (ru) | 2018-05-11 |
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