CN209979131U - Railway vehicle coupler force static calibration test bed - Google Patents
Railway vehicle coupler force static calibration test bed Download PDFInfo
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- CN209979131U CN209979131U CN201921111156.1U CN201921111156U CN209979131U CN 209979131 U CN209979131 U CN 209979131U CN 201921111156 U CN201921111156 U CN 201921111156U CN 209979131 U CN209979131 U CN 209979131U
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Abstract
The utility model relates to a test device, in particular to a railway vehicle coupler force static calibration test bed, which comprises a base body; one end of the force application piece is fixedly connected with the base body; the coupler seat is fixedly arranged on the base body, and an installation part is arranged on the coupler seat and is used for being detachably connected with a coupler; and the other end of the force application component is connected with one end of the force transmission component, and the other end of the force transmission component is used for being connected with a car coupler. When the force measuring device is used, a coupler to be calibrated is arranged on the coupler seat, external force is applied through the force application part and acts on the coupler, and the force measuring device is attached to the surface of the coupler, so that the stress of the coupler can be corresponding to the output electric signal, the calibration is completed, and the actually measured electric signal can be accurately converted into the stress of the coupler. When the test bed is used, the output force of the force application piece forms the internal force of the railway vehicle coupler force static calibration test bed, so that the test bed can be used when being moved, and is not required to be additionally fixed on other equipment or the ground.
Description
Technical Field
The utility model relates to a test device, especially a railway vehicle coupling power static calibration test platform.
Background
With the high-speed development of railway transportation in China, the heavy-duty freight transport capacity is continuously improved, and the longitudinal force of a long and large heavy-duty freight train during operation is increased, so that the stress condition of a train end connecting device, particularly the stress condition of a coupler, must be analyzed through test tests in order to evaluate the longitudinal dynamic performance of the heavy-duty freight train during operation and ensure the safe operation of the train.
Due to the particularity of the installation position of the coupler and the complexity of the operation environment, a force measuring instrument cannot be directly additionally installed to measure the force of the coupler, usually, strain generated when the coupler is stressed is converted into an electric signal by adhering a strain gauge on the surface of the coupler, the magnitude of the force of the coupler is represented by measuring the magnitude of the electric signal, but the corresponding relation between the stress of the coupler and the output electric signal needs to be calibrated in advance, and the actually measured electric signal can be accurately converted into the magnitude of the stress of the coupler. Therefore, there is a need for an experimental device capable of applying a force to a coupler, so as to facilitate a calibration experiment for determining a correspondence relationship (i.e., calibration coefficient) between the magnitude of the coupler force and the magnitude of the output electrical signal.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a utility model aim at: aiming at the problems in the prior art, the railway vehicle coupler force static calibration test bed is provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a railway vehicle coupler force static calibration test bed comprises: a substrate; one end of the force application piece is fixedly connected with the base body; the coupler seat is fixedly arranged on the base body, and an installation part is arranged on the coupler seat and is used for being detachably connected with a coupler; and the other end of the force application component is connected with one end of the force transmission component, and the other end of the force transmission component is used for being connected with a car coupler. When the force measuring device is used, a coupler to be calibrated is arranged on the coupler seat, external force is applied through the force application part and acts on the coupler, and the force measuring device is attached to the surface of the coupler, so that the stress of the coupler can be corresponding to the output electric signal, the calibration is completed, and the actually measured electric signal can be accurately converted into the stress of the coupler. When the test bed is used, the output force of the force application piece forms the internal force of the railway vehicle coupler force static calibration test bed, so that the test bed can be used when being moved, and is not required to be additionally fixed on other equipment or the ground.
In a preferred embodiment of the invention, the force transfer assembly comprises a rotating member rotatably mounted on the base; one end of the rotating piece is connected with the force application piece, and the other end of the rotating piece is used for being connected with the car coupler. Through foretell structure, adopt to rotate the transmission application of force spare power, then through adjusting the arm of force proportion size of the power that rotates the power that receives at a both ends, can realize the regulation to the coupling atress.
In a preferred embodiment of the present invention, the force transfer assembly further comprises a first connector and a second connector; the rotating piece is connected with the force application piece through a first connecting piece; and a connecting ring is formed on the second connecting piece, and the second connecting piece is used for connecting the rotating piece and the coupler. Through the connecting ring structure, the second connecting piece is conveniently and quickly connected with the car coupler.
In a preferred embodiment of the present invention, the rotating member is provided with a first connecting hole, a second connecting hole and a third connecting hole, the first connecting hole is used for connecting with the first connecting member, the second connecting hole is used for connecting with the second connecting member, and the third connecting hole is used for rotatably connecting with the base member.
In a preferred embodiment of the present invention, the base body forms an accommodating space and an installation platform, and the accommodating space and the installation platform are arranged in a first direction; the force application piece is arranged in the accommodating space, and the coupler seat is arranged on the mounting platform; the force application part is used for outputting acting force in a second direction, and the rotating part is arranged at the end part of the base body; the first direction and the second direction are arranged at an included angle. Through the structure, the railway vehicle coupler force static calibration test bed is compact in structure and small in occupied space.
In a preferred embodiment of the present invention, the accommodating space is provided with a first supporting plate and a second supporting plate, and the first supporting plate and the second supporting plate are arranged at intervals; the first support plate is connected with the force application member, and the second support plate is connected with the force application member.
The utility model discloses an in the embodiment of the preferred, the static calibration test platform of rail vehicle coupler power still includes the installed part, is equipped with the mounting hole on the coupler seat, installed part and mounting hole adaptation.
In a preferred embodiment of the present invention, the force applying member includes a hydraulic cylinder.
In the preferred embodiment of the utility model, the railway vehicle coupler force static calibration test bed further comprises a force measuring component, and the force measuring component comprises a force measuring piece and a measuring circuit; the force measuring piece is used for being connected with the car coupler and deforms along with the stress of the car coupler; the force measuring piece is connected with a measuring circuit, and the measuring circuit is used for outputting the deformation of the force measuring piece into an electric signal.
In a preferred embodiment of the present invention, the force measuring member includes a measuring piece and a compensating piece, the measuring piece is arranged along the force-bearing direction of the coupler, and the compensating piece is arranged perpendicular to the measuring piece; the measuring circuit is a full bridge measuring circuit. The compensation sheet is used for offsetting deformation of the coupler force generated by environmental factors, so that the measurement result is more accurate.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
when the force measuring device is used, a coupler to be calibrated is arranged on the coupler seat, external force is applied through the force application part and acts on the coupler, and the force measuring device is attached to the surface of the coupler, so that the stress of the coupler can be corresponding to the output electric signal, the calibration is completed, and the actually measured electric signal can be accurately converted into the stress of the coupler.
Drawings
Fig. 1 is a schematic structural diagram of a railway vehicle coupler force static calibration test bed provided by the embodiment of the present invention when the railway vehicle coupler force static calibration test bed is connected with a coupler.
Fig. 2 is a schematic structural diagram of a substrate according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a coupler seat according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a railway vehicle coupler force static calibration test bed provided by the embodiment of the present invention when the railway vehicle coupler force static calibration test bed is connected with a coupler.
Fig. 5 is a schematic structural diagram of a coupler and a schematic position diagram of a measurement point on the coupler according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a relative position between a measuring plate and a compensating plate according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a measurement circuit according to an embodiment of the present invention.
The labels in the figure are: 11-a substrate; 111-an accommodating space; 112-a mounting platform; 113-a first support plate; 114-a second support plate; 115-a rotating shaft; 12-a force applying member; 131-a first connector; 132-a second connector; 133-a rotating member; 14-coupler seat; 141-a mounting portion; 142-a mounting member; 151-measuring sheet; 152-a compensator; 153-coupler left side measuring position; 154-coupler right side measuring position; 21-hook head; 23-a tongue structure; 22-hook tail; y-a first direction; x-a second direction.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Examples
Please refer to fig. 1-7. The embodiment of the utility model provides a railway vehicle coupler power static calibration test platform, it includes base member 11, application of force spare 12, drive assembly, coupler seat 14 and measuring force subassembly.
Referring to fig. 1, fig. 2 and fig. 4, an accommodating space 111 and a mounting platform 112 are formed on the substrate 11. The accommodating space 111 and the mounting platform 112 are arranged in a first direction Y, which is a height direction of the base 11 during operation.
The accommodating space 111 is fixedly provided with a first supporting plate 113 and a second supporting plate 114, and the first supporting plate 113 and the second supporting plate 114 are oppositely arranged at intervals. The force applying member 12 is fixedly coupled to the first support plate 113 and the second support plate 114. In the present embodiment, the urging member 12 is selected as a hydraulic cylinder. The hydraulic cylinders are arranged along the second direction X, namely the length direction of the hydraulic cylinders is consistent with the second direction X.
The output end of the force application member 12 is connected with one end of a transmission assembly, and the other end of the transmission assembly is used for being connected with a coupler.
Specifically, the transmission assembly includes a first connecting member 131, a second connecting member 132, and a rotating member 133.
The first connecting member 131 has a rod-like structure. The second connecting member 132 is selected as an iron chain with a buckle, and a connection ring can be formed on the second connecting member 132 by connecting the buckle with an iron button of the iron chain. The connecting ring is matched with the tongue-shaped structure 23 on the coupler head 21, and under the combined action of the gravity of the coupler and the tongue-shaped structure 23, the connecting ring can be prevented from being separated from the coupler in the calibration process. The rotation member 133 is provided with a first connection hole, a second connection hole, and a third connection hole, the base body 11 is provided with a rotation shaft 115, and the third connection hole is rotatably connected to the rotation shaft 115 so that the rotation member 133 can rotate with respect to the base body 11.
In the present embodiment, the rotation member 133 includes a first rotating arm and a second rotating arm fixedly coupled, and a third coupling hole is provided at an intersection of the first rotating arm and the second rotating arm. The end of the first swivel arm remote from the second swivel arm is connected to a first connection 131 and the end of the second swivel arm remote from the first swivel arm is connected to a second connection 132. When the pulling force needs to be adjusted, the rotating part 133 with the unequal length ratio of the first rotating arm and the second rotating arm is used instead.
The output end of the force application member 12 is connected to one end of the first connection member 131, and the other end of the first connection member 131 is connected to the first connection hole of the rotation member 133. The second coupling hole of the rotating member 133 is coupled to one end of the second coupling member 132, and the coupling ring of the second coupling member 132 is used for coupling to a coupler.
Referring to fig. 3, the coupler seat 14 is disposed on the mounting platform 112. The coupler seat 14 is provided with a mounting portion 141, and specifically, the mounting portion 141 is a groove structure. The coupler tail 22 of the coupler may be disposed in the mounting portion 141. The side wall of the mounting portion 141 is provided with a mounting hole for corresponding to a hole on the hook tail 22. The coupler seat 14 further comprises a mounting member 142, which in this embodiment is provided as a pin 142. Coupling of the coupler to the coupler base 14 is accomplished by the mounting member 142 passing through the mounting hole and the hole in the coupler tail 22 in turn.
In this embodiment, when the coupler is coupled to the coupler socket 14, the length direction of the coupler is used to be the same as the second direction X, that is: the coupler is configured to have a longitudinal direction that coincides with the direction of the biasing member 12.
In the present embodiment, the first direction Y and the second direction X are perpendicular to each other.
Referring to fig. 5, 6 and 7, the force measuring assembly includes a force measuring element and a measuring circuit.
The force measuring piece is used for being connected with the car coupler and deforms along with the stress of the car coupler. In this embodiment, the force-measuring cell is a bidirectional resistance strain gauge. The force measuring piece comprises a measuring piece 151 and a compensating piece 152, the measuring piece 151 is arranged along the force-bearing direction of the coupler, and the compensating piece 152 is arranged perpendicular to the measuring piece 151.
The measuring circuit is a full bridge measuring circuit.
The utility model provides a railway vehicle coupling power static calibration test platform when being used for measuring coupling power, its measuring method includes following step:
step one, determining the position of a measuring point on a coupler;
specifically, position points are selected on rectangular surfaces on the left side and the right side of the coupler, which are close to the second connecting piece 132, three measuring points 1a, 1b and 1c are selected on the left side of the coupler, three measuring points 1d, 1e and 1f are selected on the right side of the coupler, and the measuring points on the left side of the coupler and the measuring points on the right side of the coupler are symmetrically arranged.
Further, the measuring point 1b is located between the measuring point 1a and the measuring point 1c, and the measuring point 1b is located at a quarter length of the rectangular surface on the left side of the coupler. The distance between the measuring points 1a, 1b, 1c is set to 4cm-6cm, and further, in this embodiment, the distance between the measuring points 1a, 1b, 1c is 5 cm.
The measuring point 1a is located on the side of the measuring point 1b which is closer to the coupler head 21, and the measuring point 1c is located on the side of the measuring point 1b which is further away from the coupler head 21.
Further, the measuring point 1e is located between the measuring point 1d and the measuring point 1f, and the measuring point 1e is located at a quarter length of the rectangular surface on the right side of the coupler. The distance between the measuring points 1d, 1e, and 1f is set to 4cm to 6cm, and further, in this embodiment, the distance between the measuring points 1d, 1e, and 1f is 5 cm.
The measuring point 1d is located on the side of the measuring point 1f close to the coupler head 21, and the measuring point 1f is located on the side of the measuring point 1e remote from the coupler head 21.
Through the arrangement, the distance between the measuring point 1a and the coupler head 21 is equal to the distance between the measuring point 1d and the coupler head 21; the distance between the measuring point 1b and the coupler head 21 is equal to the distance between the measuring point 1e and the coupler head 21; the distance between the measuring point 1c and the coupler head 21 is equal to the distance between the measuring point 1f and the coupler head 21.
And after the measuring point is selected, polishing the measuring point.
Specifically, the selected measuring point is polished to be flat by a polisher, no defects such as sand holes and the like exist below the measuring point, and then the polishing point is polished to be smooth by fine sand paper. And cleaning polishing points to ensure that no impurities or gaps exist between the contact surfaces of the measuring piece and the car coupler.
Step two, arranging a measuring piece on the measuring point, and connecting the measuring piece to a measuring circuit;
specifically, the measuring piece 151 and the compensating piece 152 are attached to a measuring point located at the central point of the side surface of the coupler, the measuring piece 151 and the compensating piece 152 on the measuring points 1a and 1d form a set of full-bridge measuring circuits, the measuring piece 151 and the compensating piece 152 on the measuring points 1b and 1e form a set of full-bridge measuring circuits, the measuring piece 151 and the compensating piece 152 on the measuring points 1c and 1f form a set of full-bridge measuring circuits, that is, three sets of measuring circuits are formed in total, 2V direct current is applied to the power supply terminal, and the voltage value is measured, that is: the group of measuring circuits comprises a measuring piece 151 and a compensating piece 152 on a coupler left side measuring position 153, and a measuring piece 151 and a compensating piece 152 on a coupler right side measuring position 154 corresponding to the coupler left side measuring position 153;
furthermore, a measuring piece 151 and a compensating piece 152 are arranged at each measuring point, the measuring piece 151 is arranged along the stress direction of the coupler, and the compensating piece 152 is arranged perpendicular to the measuring piece 151;
and the assembled measuring circuit is connected with a data acquisition instrument, a power line is connected to a power supply end, and a data line is connected to a measuring end.
Thirdly, applying a pulling/pressing hook force on the car coupler, and reading a voltage value output on the measuring circuit when the pulling/pressing hook force acts to obtain a corresponding relation between the magnitude of the pulling/pressing hook force and the magnitude of the voltage value, namely a calibration coefficient;
specifically, the calibration coefficient is a ratio of a pull/press hook force to a voltage value.
The coupler is mounted on the railway vehicle coupler force static calibration test bed provided in this embodiment, the coupler head 21 of the coupler is connected with the connecting ring formed on the second connecting member 132, and the end of the coupler far from the coupler head 21 is connected with the coupler seat 14. By sequentially applying F by means of force-applying members 121、F2、F3、F4Each magnitude of the stable pull/press hooking force of (a) is applied at least twice. In this embodiment, each magnitude of the pulling/pressing hook force is applied three times, so that three output voltage values can be read under the same magnitude of the pulling/pressing hook force, and the average value of the three output voltage values is taken as the output voltage value under the same magnitude of the pulling/pressing hook force.
From F1To F4The magnitude of the pulling/pressing hook force is gradually increased, wherein the maximum load F is applied4Greater than 60% of the maximum pulling/pressing force that the coupler is allowed to withstand. In actual operation, the coupler can bear pull/press hook force which is up to 60% of the allowable load.
For each measuring circuit, four voltage values and pull/press voltages output by the measuring circuit under the action of four pull/press hooking forcesAnd performing linear fitting on the magnitude of the hook force, wherein the slope K of the obtained straight line is the calibration coefficient of the measuring circuit. Thereby obtaining the calibration coefficient K of three groups of bridges of the coupler force measuring device1、K2、K3。
After the steps are completed, the calibration coefficient is determined. After the calibration is finished, the following steps are carried out:
and step four, measuring the coupler force.
Specifically, the coupler which is calibrated is installed between railway vehicles needing to measure coupler force. Voltage time sequence data output by the coupler force measurement bridge circuit are collected, and measured data are multiplied by corresponding calibration coefficients to be converted into coupler force time sequence data, namely F is equal to K multiplied by U.
And U is output voltage time sequence data, K is a calibration coefficient, and F is coupler force time sequence data.
And (4) respectively taking the calibration coefficients of the three measurement circuits as the reference to obtain the time series data of the coupler force of the three measurement circuits.
In this embodiment, three sets of full-bridge measurement circuits are provided in consideration of the problems that the test environment is complex, and the strain gauge and the signal line are easily damaged in the actual driving process. In the actual measurement process, if the sizes of the car coupler forces obtained by the three groups of bridges through the conversion of the corresponding calibration coefficients are similar or have larger differences, the final car coupler force is the average value of the three car coupler forces; and if two groups are close and the difference of the other group is larger, taking the mean value of two groups of close coupler forces as a final coupler force measured value. In practice, those skilled in the art can determine the specific criteria for determining whether the coupler force is close to each other according to experience and required measurement accuracy.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a railway vehicle coupling power static calibration test platform which characterized in that includes:
a substrate;
one end of the force application part is fixedly connected with the base body;
the coupler seat is fixedly arranged on the base body, and an installation part is arranged on the coupler seat and is used for being detachably connected with a coupler;
and the other end of the force application component is connected with one end of the force transmission component, and the other end of the force transmission component is used for being connected with a car coupler.
2. The railway car coupler force static calibration test bed of claim 1, wherein the force transfer assembly comprises a rotating member rotatably mounted to the base;
one end of the rotating piece is connected with the force application piece, and the other end of the rotating piece is used for being connected with the car coupler.
3. The railway car coupler force static calibration test bed of claim 2, wherein the force transfer assembly further comprises a first connector and a second connector;
the rotating piece is connected with the force application piece through the first connecting piece;
and a connecting ring is formed on the second connecting piece, and the second connecting piece is used for connecting the rotating piece and the coupler.
4. The railway vehicle coupler force static calibration test bed according to claim 3, wherein the rotating member is provided with a first connecting hole, a second connecting hole and a third connecting hole, the first connecting hole is used for being connected with the first connecting piece, the second connecting hole is used for being connected with the second connecting piece, and the third connecting hole is used for being rotatably connected with the base body.
5. The railway vehicle coupler force static calibration test bed according to claim 3, wherein an accommodating space and an installation platform are formed on the base body, and the accommodating space and the installation platform are arranged in a first direction;
the force application piece is arranged in the accommodating space, and the coupler seat is arranged on the mounting platform;
the force application part is used for outputting acting force in a second direction, and the rotating part is arranged at the end part of the base body;
the first direction and the second direction are arranged at an included angle.
6. The railway vehicle coupler force static calibration test bed according to claim 5, wherein a first support plate and a second support plate are arranged in the accommodating space, and the first support plate and the second support plate are arranged at intervals;
the first supporting plate is connected with the force application part, and the second supporting plate is connected with the force application part.
7. The railway vehicle coupler force static calibration test bed according to claim 1, further comprising a mounting piece, wherein a mounting hole is formed in the coupler seat, and the mounting piece is matched with the mounting hole.
8. The railway car coupler force static calibration test bed of claim 1, wherein the force application member comprises a hydraulic cylinder.
9. The railway vehicle coupler force static calibration test bed according to claim 1, further comprising a force measuring assembly, wherein the force measuring assembly comprises a force measuring piece and a measuring circuit;
the force measuring piece is used for being connected with the car coupler and deforms along with the stress of the car coupler;
the force measuring piece is connected with the measuring circuit, and the measuring circuit is used for outputting the deformation of the force measuring piece into an electric signal.
10. The railway vehicle coupler force static calibration test bed according to claim 9, wherein the force measuring element comprises a measuring piece and a compensating piece, the measuring piece is used for being arranged along the force bearing direction of the coupler, and the compensating piece is arranged perpendicular to the measuring piece;
the measuring circuit is a full-bridge measuring circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921111156.1U CN209979131U (en) | 2019-07-16 | 2019-07-16 | Railway vehicle coupler force static calibration test bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921111156.1U CN209979131U (en) | 2019-07-16 | 2019-07-16 | Railway vehicle coupler force static calibration test bed |
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| CN209979131U true CN209979131U (en) | 2020-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307933A (en) * | 2019-07-16 | 2019-10-08 | 西南交通大学 | A kind of railway vehicle coupler power static demarcating testing stand |
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2019
- 2019-07-16 CN CN201921111156.1U patent/CN209979131U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307933A (en) * | 2019-07-16 | 2019-10-08 | 西南交通大学 | A kind of railway vehicle coupler power static demarcating testing stand |
| CN110307933B (en) * | 2019-07-16 | 2024-03-29 | 西南交通大学 | Static calibration test bed for coupler force of railway vehicle |
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