A portable wheel-rail lateral force calibration device and calibration method without wheels falling off

Abstract

The present invention discloses a wheel-rail lateral force calibration device and calibration method without wheels falling down, wherein the calibration device comprises two wheel-grip modules, a first tie rod, a second tie rod, a bidirectional loader, a load sensor, a support unit, an oil pump and a power supply device; the wheel-grip modules are installed in cooperation with the force measuring wheelset; the bidirectional loader is connected to the load sensor; the bidirectional loader is connected to one wheel-grip module through the first tie rod, and the load sensor is connected to the other wheel-grip module through the second tie rod; the support unit is arranged below the bidirectional loader; the oil pump is connected to two oil filling holes; and the power supply device supplies power to the oil pump. When the calibration device of the present invention is used to calibrate the lateral force of the force measuring wheelset, a rapid calibration experiment can be performed when the train is put into storage, without disassembling the bogie of the train, and then the calibration test bench of the force measuring wheelset is used for calibration, which not only improves the running efficiency of the train, but also reduces the cost of lateral force calibration.

Description

Technical Field

[0001] The invention relates to the technical field of train operation safety monitoring, and in particular to a wheel-free portable wheel-rail lateral force calibration device and a calibration method. Background Art

[0002] In order to ensure the safety of train operation, it is necessary to monitor the dynamic behavior of the train in real time to evaluate the derailment coefficient, stability and other dynamic performance indicators of the train during operation. The most effective method is to detect the changes in the lateral wheel-rail contact force of the train. Among the existing wheel-rail force measurement methods, the wheel-rail force measurement during train operation is mainly divided into two categories: one is to detect the wheel-rail force through the trackside test device. This method can only measure the wheel-rail at a fixed point and cannot monitor the wheel-rail force in real time for a long time and a long distance; the other is to use a special force measuring wheelset to continuously measure the wheel-rail force. The wheelset is one of the parts that can best reflect the wheel-rail contact force, and the detection device based on the wheelset can monitor the running status of the train in real time. Therefore, the wheel-rail force measurement method is widely used in the field of railway transportation. However, with the increase of running time, the accuracy of the wheel-rail force measurement device arranged in the force measuring wheelset will gradually decrease, and the force measuring wheelset needs to be recalibrated. At present, the mainstream calibration of dynamometric wheelsets in China is completed through the dynamometric wheelset wheel-rail force calibration test bench. This test bench is not only large in size and complex in structure, but also calibrates only single dynamometric wheelsets. In other words, the bogie of the train needs to be disassembled to complete the calibration of the dynamometric wheelset, which will seriously affect the operating efficiency of the train.

[0003] Therefore, designing a calibration device that can quickly recalibrate the dynamometer wheelset without the wheels falling is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a portable wheel-rail lateral force calibration device with a wheel-free surface, a simple and reliable structure, which is of great significance for reducing the calibration cost of the force measuring wheel pair and improving the train operation efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a portable wheel-rail lateral force calibration device without wheels, comprising two wheel-grip modules, a first pull rod, a second pull rod, a bidirectional loader, a load sensor, a support unit, an oil pump and a power supply device; the two wheel-grip modules have the same structure and are arranged relatively to each other, and are used to be installed in conjunction with the two wheels of the force measuring wheel pair respectively; the bidirectional loader is connected to the load sensor and is arranged between the two wheel-grip modules; the bidirectional loader is connected to one of the wheel-grip modules through the first pull rod, and the load sensor is connected to the other wheel-grip module through the second pull rod; the support unit is arranged below the bidirectional loader, and is used to support and fix the bidirectional loader; the oil pump is respectively connected to the two oil filling holes of the bidirectional loader through two oil pipes; and the power supply device is electrically connected to the oil pump through a power cord.

[0006] Furthermore, the wheel grip module includes a clamping portion, a clamping plate, a clamping bolt and a connecting portion, the clamping portion includes a first side plate and a second side plate, the second side plate is arranged parallel to the first side plate and maintains a predetermined interval with the first side plate, and the first side plate is connected to the second side plate through a connecting plate; the clamping plate is arranged between the first side plate and the second side plate, and is detachably fixedly connected to one end of the clamping bolt, and the clamping bolt is installed through a through hole on the second side plate; the connecting portion is arranged on the outer side of the second side plate and close to one end of the connecting plate; when installing the calibration device, the distance between the clamping plate and the first side plate is adjusted by adjusting the clamping bolt so that the clamping portion clamps the wheel rim.

[0007] Furthermore, a soft rubber layer is provided on the inner surface of the clamping portion.

[0008] Furthermore, the two ends of the first pull rod are respectively connected to the bidirectional loader and the connecting part of one of the grip wheel modules through connectors; one end of the second pull rod is threadedly connected to the load sensor, and the other end of the second pull rod is connected to the connecting part of another of the grip wheel modules through a connector.

[0009] Furthermore, the bidirectional loader includes a cylinder body, a hinge and a piston rod, one end of the piston rod is installed in the cylinder body, the piston on the piston rod divides the cylinder inner cavity of the cylinder body into two oil chambers, and each of the two oil chambers is provided with an oil filling hole; the other end of the piston rod passes through the front end cover of the cylinder body and extends out of the cylinder body, and is connected to the first pull rod; the hinge is arranged on the rear end cover of the cylinder body, and the hinge is provided with a hinge hole.

[0010] Furthermore, the load sensor is hingedly connected to the bidirectional loader.

[0011] Furthermore, the support unit includes a support body and a plurality of support rods located at the bottom of the support body, the upper surface shape of the support body is adapted to the bottom shape of the bidirectional loader; the length of the support body is less than the distance between the two oil filling holes of the bidirectional loader.

[0012] The present invention also provides a method for calibrating wheel-rail lateral force of a portable wheel-mounted vehicle, using the calibration device described above, the method comprising the following steps:

[0013] S1. Determine the wheel rim loading position on the two wheels of the force measuring wheelset;

[0014] S2. Install the wheel grip module at the selected wheel rim loading position, and make the wheel grip module clamp the wheel rim inside the wheel; after the wheel grip module is installed, first connect one end of the first tie rod and the second tie rod to the two wheel grip modules respectively, then fix the support unit on the ground, and place the bidirectional loader on the support unit, so that the two oil filling holes of the bidirectional loader are open downward, and use two oil pipes to connect the two oil filling holes to the oil pump respectively; hinge the load sensor to the bidirectional loader, and connect the other ends of the first tie rod and the second tie rod to the bidirectional loader and the load sensor respectively, and finally complete the assembly of the entire wheel-rail lateral force calibration device;

[0015] S3, start the oil pump, the oil pump pumps hydraulic oil to the bidirectional loader, and by adjusting the bidirectional loader to pump hydraulic oil to different chambers, the piston can be pushed to move, thereby driving the piston rod to move, and bidirectional loading can be achieved; by adjusting the pumping amount of the hydraulic oil by the oil pump, different loads can be applied to the dynamometer wheel pair, and the specific value of the applied load can be observed by the load sensor; the oil pump is continuously adjusted to apply different loads to the dynamometer wheel pair, and the lateral force measuring device of the dynamometer wheel pair is calibrated until the entire calibration experiment is completed;

[0016] S4. After completing the calibration experiment of the dynamometric wheelset, first start the oil pump and adjust the bidirectional loader to an unloaded position; then turn off the oil pump to allow the wheel grip module to release the wheel, and separate the assembled calibration equipment from the dynamometric wheelset as a whole, and then separate each component unit of the calibration equipment separately.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention utilizes a wheel grip module to clamp the wheel rim and fixes it with a clamping plate, and then connects a bidirectional loader and a load sensor through a pull rod, thereby achieving clamping and fixing of lateral force loading calibration tests on force measuring wheels of different sizes, thereby reducing the cost of conducting calibration experiments.

[0019] 2. The present invention covers the inner surface of the clamping part of the wheel grip module with a soft rubber layer, thereby ensuring that the damage to the tread of the dynamometric wheelset is minimized while completing the lateral force calibration measurement of the dynamometric wheelset, thereby ensuring the safety of train operation.

[0020] 3. In the present invention, the two wheel grip modules are detachably connected to one end of the first pull rod and the second pull rod through a connector, the bidirectional loader is detachably connected to the other end of the first pull rod through a connector, the other end of the bidirectional loader is hinged to the load sensor, the load sensor is threadedly connected to the other end of the second pull rod, the bidirectional loader is supplied with oil by an oil pump through an oil pipeline, and the oil pump is powered by an outdoor power supply. Each component can be disassembled separately, which greatly reduces the mass and volume of the lateral force calibration device of the dynamometer wheel, further facilitates carrying and transportation, and greatly reduces the workload of testers.

[0021] 4. When using the calibration method of the present invention to calibrate the lateral force of the dynamometric wheelset, a quick calibration experiment can be performed when the train is put into storage, without disassembling the bogie of the train, and then calibrating using the calibration test bench of the dynamometric wheelset, which not only improves the operating efficiency of the train, but also reduces the cost of lateral force calibration.

[0022] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the installation structure of the wheel-rail lateral force calibration device according to a preferred embodiment of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the center wheel-rail lateral force calibration device;

[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the wheel grip module of the mid-wheel-rail lateral force calibration device;

[0027] Figure 4 for Figure 1 A schematic diagram of the structure of the support module of the mid-wheel-rail lateral force calibration device;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure of the bidirectional loading module of the center wheel-rail lateral force calibration device;

[0029] Among them, 1-force measuring wheelset, 2-wheel grip module, 201-clamping part, 203-clamping plate, 204-clamping bolt, 205-connecting part, 401-first tie rod, 402-second tie rod, 5-bidirectional loader, 501-cylinder body, 502-oil filling hole, 503-hinge part, 504-piston rod, 6-load sensor, 7-support unit, 701-support body, 702-support rod, 8-oil pipeline, 9-oil pump, 10-power cord, 11-power supply device. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] See also Figures 1 to 5 The portable wheel-rail lateral force calibration device of the present embodiment includes two wheel-gripping modules 2, a first pull rod 401, a second pull rod 402, a bidirectional loader 5, a load sensor 6, a support unit 7, an oil pump 9 and a power supply device 11; the specific structure is as follows:

[0032] The two wheel grip modules 2 have the same structure and are arranged opposite to each other, and are used to cooperate with the two wheels of the dynamometer wheel set 1 for installation. The wheel grip module includes a clamping part 201, a clamping plate 203, a clamping bolt 204 and a connecting part 205. The clamping part 201 includes a first side plate and a second side plate. The second side plate is arranged parallel to the first side plate and maintains a predetermined interval with the first side plate. The first side plate is connected to the second side plate through a connecting plate. The clamping plate 203 is arranged between the first side plate and the second side plate, and is detachably fixedly connected to one end of the clamping bolt 204. The clamping bolt 204 is installed through the through hole on the second side plate. The connecting part 205 is arranged on the outside of the second side plate and close to one end of the connecting plate. When installing the calibration device, the first side plate of the clamping part contacts the outer surface of the wheel, and the distance between the clamping plate 203 and the first side plate is adjusted by adjusting the clamping bolt 204, so that the clamping plate contacts the inner surface of the wheel, and then the clamping part 201 clamps the wheel rim. In this structural setting, a soft rubber layer 202 is also provided on the inner surface of the clamping part, which can ensure that the damage to the tread of the dynamometric wheelset is minimized while completing the lateral force calibration measurement of the dynamometric wheelset, thereby ensuring the safety of train operation.

[0033] The bidirectional loader 5 is connected to the load sensor 6 and is arranged between the two wheel grip modules 2; the bidirectional loader 5 includes a cylinder body 501, a hinged part 503 and a piston rod 504, one end of the piston rod 504 is installed in the cylinder body 501, and the piston on the piston rod 504 divides the inner cavity of the cylinder of the cylinder body 501 into two oil chambers, and each of the two oil chambers is provided with an oil filling hole 502; the other end of the piston rod 504 passes through the front end cover of the cylinder body 501 and extends to the outside of the cylinder body 501, and is connected to the first pull rod 401; the hinged part 503 is arranged on the rear end cover of the cylinder body 501, and a hinge hole is provided on the hinged part. The load sensor 6 is hingedly connected to the bidirectional loader 5. Specifically, the two ends of the first pull rod 401 are respectively connected to the bidirectional loader 5 and the connecting part 205 of a wheel grip module 2 through the connector 3; one end of the second pull rod 402 is threadedly connected to the load sensor 6, and the other end of the second pull rod 402 is connected to the connecting part 205 of another wheel grip module 2 through the connector 3. The load sensor is connected to the two wheel grip modules through a bidirectional loader, a first pull rod and a second pull rod, etc., so as to realize lateral force loading on the wheel rim of the force measuring wheel pair.

[0034] The support unit 7 is arranged below the bidirectional loader 5. The support unit is used to maintain the horizontal height of the bidirectional loader 5 and fix the bidirectional loader. The support unit includes a support body 701 and four support rods 702 located at the bottom of the support body. The upper surface shape of the support body is adapted to the bottom shape of the bidirectional loader. The length of the support body is less than the distance between the two oil injection holes 502 of the bidirectional loader 5 to ensure that the bidirectional loader will not fall off due to a large relative displacement with the support body. The position of the support body is fixed by four support rods below the support body to ensure that the entire calibration device will not have a large displacement in the vertical direction.

[0035] The oil pump 9 is connected to the two oil filling holes 502 of the bidirectional loader 5 through two oil delivery pipes 8 respectively; the power supply device 11 is electrically connected to the oil pump 9 through the power line 10. In this structural setting, the oil pump is powered by the power supply device 11 through the power line, and the oil pump is connected to the oil filling holes of the bidirectional loader through two oil delivery hoses to deliver or receive hydraulic oil to the bidirectional loader. The amount of hydraulic oil in the two chambers of the bidirectional loader can be adjusted by the oil pump, so that the piston can be pushed to drive the piston rod to move, and the tensile loading amount of the wheel rim can be obtained by reading the tensile force indication of the load sensor.

[0036] The embodiment of the present invention further provides a method for calibrating wheel-rail lateral force of a portable wheel-free wheel, using the above calibration device, the method comprises the following steps:

[0037] 1. Determine the wheel rim loading position on the two wheels of the force measuring wheelset 1; when the train enters the depot or station for calibration test, first fix the whole train with rail iron shoes to prevent the train from slipping during the calibration test. Considering the large friction between the track and the wheel, the calibration test near the wheel-rail contact point will affect the accuracy. Another wheel rim loading point for the calibration test should be found. Obviously, the wheel rim at the farthest distance is least affected by the wheel-rail friction, but there is little space above the wheel, making it difficult to arrange the calibration equipment. Considering the influence of wheel-rail friction and bogie space, the wheel rim loading point is selected as the wheel rim that is half the wheel diameter away from the track and close to the outside of the bogie.

[0038] 2. After determining the wheel rim loading position, install the wheel grip module 2 at the selected wheel rim loading position so that the soft rubber layer 202 on the first side plate of the clamping part of the wheel grip module 2 contacts the outer surface of the wheel rim, and then adjust the clamping bolt 204 to clamp the inner surface of the wheel rim with the clamping plate 203; after the wheel grip module 2 is installed, first install the two connectors 3 on the two wheel grip modules 2 respectively, and connect one end of the first tie rod 401 and the second tie rod 402 to the two wheel grip modules 2 respectively through the two connectors 3, then fix the support unit 7 on the ground, and place the bidirectional loader 5 on the support body 701 of the support unit 7, so that the two oil filling holes 502 of the bidirectional loader 5 are open downward, and use two oil pipes 8 to connect the two oil filling holes 502 to the oil pump 9 respectively; hinge the load sensor 6 to the bidirectional loader 5, and connect the other ends of the first tie rod 401 and the second tie rod 402 to the bidirectional loader and the load sensor respectively, and finally complete the assembly of the entire wheel-rail lateral force calibration device.

[0039] 3. Turn on the oil pump 9, which pumps hydraulic oil to the bidirectional loader 5. By adjusting the bidirectional loader to pump hydraulic oil to different chambers, the piston can be pushed to move, thereby driving the piston rod 504 to move, and bidirectional loading can be achieved; by adjusting the pumping amount of hydraulic oil by the oil pump, different loads can be applied to the dynamometer wheel set, and the specific value of the applied load can be observed by the load sensor; the oil pump 9 is continuously adjusted to apply different loads to the dynamometer wheel set 1, and the lateral force measuring device of the dynamometer wheel set is calibrated until the entire calibration experiment is completed;

[0040] 4. After completing the calibration experiment of the dynamometer wheelset 1, first start the oil pump 9 and adjust the bidirectional loader 5 to the unloaded position; then turn off the oil pump 9 to release the wheel from the wheel grip module 2, and separate the assembled calibration equipment from the dynamometer wheelset 1 as a whole, and then separate each component unit of the calibration equipment separately.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable wheel-rail lateral force calibration device without wheels, characterized in that: The invention comprises two wheel grip modules (2), a first pull rod (401), a second pull rod (402), a bidirectional loader (5), a load sensor (6), a support unit (7), an oil pump (9) and a power supply device (11); the two wheel grip modules (2) have the same structure and are arranged relative to each other, and are used to be respectively installed in cooperation with two wheels of a dynamometric wheel set (1); the bidirectional loader (5) is connected to the load sensor (6) and is arranged between the two wheel grip modules (2); the bidirectional loader (5) is connected to one of the wheel grip modules (2) through the first pull rod (401), and the load sensor (6) is connected to the other wheel grip module (2) through the second pull rod (402). ) connected; the support unit (7) is arranged below the bidirectional loader (5) for supporting and fixing the bidirectional loader (5); the oil pump (9) is respectively connected to the two oil filling holes (502) of the bidirectional loader (5) through two oil delivery pipes (8); the power supply device (11) is electrically connected to the oil pump (9) through a power line (10); the wheel grip module includes a clamping portion (201), a clamping plate (203), a clamping bolt (204) and a connecting portion (205), the clamping portion (201) includes a first side plate and a second side plate, the second side plate is arranged parallel to the first side plate and maintains a predetermined interval with the first side plate, the first side plate The clamping plate (203) is connected to the second side plate through a connecting plate; the clamping plate (203) is arranged between the first side plate and the second side plate, and is detachably fixedly connected to one end of the clamping bolt (204), and the clamping bolt (204) is installed in a through hole on the second side plate; the connecting portion (205) is arranged on the outer side of the second side plate and close to one end of the connecting plate; when installing the calibration device, the distance between the clamping plate (203) and the first side plate is adjusted by adjusting the clamping bolt (204), so that the clamping portion (201) clamps the wheel rim; the bidirectional loader (5) includes a cylinder body (501), a hinge portion (503) and a piston rod (504), one end of the piston rod (504) is installed in the cylinder body (501), the piston on the piston rod (504) divides the inner cavity of the cylinder of the cylinder body (501) into two oil chambers, each of the two oil chambers is provided with an oil filling hole (502); the other end of the piston rod (504) passes through the front end cover of the cylinder body (501) and extends to the outside of the cylinder body (501), and is connected to the first pull rod (401); the hinged part (503) is arranged on the rear end cover of the cylinder body (501), and the hinged part is provided with a hinged hole; the load sensor (6) is hingedly connected to the bidirectional loader (5) through the hinged hole.

2. The calibration device according to claim 1, characterized in that: A soft rubber layer (202) is arranged on the inner surface of the clamping portion.

3. The calibration device according to claim 1, characterized in that: The two ends of the first pull rod (401) are respectively connected to the bidirectional loader (5) and the connecting part (205) of one of the gripping wheel modules (2) through a connector (3); one end of the second pull rod (402) is threadedly connected to the load sensor (6), and the other end of the second pull rod (402) is connected to the connecting part (205) of another of the gripping wheel modules (2) through a connector (3).

4. The calibration device according to claim 1, characterized in that: The support unit comprises a support body (701) and a plurality of support rods (702) located at the bottom of the support body, the upper surface shape of the support body being adapted to the bottom shape of the bidirectional loader; the length of the support body is less than the distance between the two oil injection holes (502) of the bidirectional loader (5).

5. A portable wheel-rail lateral force calibration method without wheels, characterized in that: Using the calibration device as described in any one of claims 1 to 4, the method comprises the following steps: S1. determining the wheel rim loading position on two wheels of the force measuring wheelset (1); S2. Install the wheel grip module (2) at the selected wheel rim loading position, and make the wheel grip module (2) clamp the wheel rim inside the wheel; after the wheel grip module (2) is installed, first connect one end of the first tie rod (401) and the second tie rod (402) to the two wheel grip modules (2) respectively, then fix the support unit (7) on the ground, and place the bidirectional loader (5) on the support unit (7), so that the two oil filling holes (502) of the bidirectional loader (5) are open downward, and use two oil pipes (8) to connect the two oil filling holes (502) to the oil pump (9) respectively; hinge the load sensor (6) to the bidirectional loader (5), and connect the other ends of the first tie rod (401) and the second tie rod (402) to the bidirectional loader and the load sensor respectively, and finally complete the assembly of the entire wheel-rail lateral force calibration device; S3, start the oil pump (9), the oil pump (9) pumps hydraulic oil to the bidirectional loader (5), and by adjusting the bidirectional loader to pump hydraulic oil to different chambers, the piston can be pushed to move, thereby driving the piston rod (504) to move, thereby realizing bidirectional loading; by adjusting the pumping amount of hydraulic oil by the oil pump, different loads can be applied to the dynamometer wheel pair, and the specific value of the applied load can be observed by the load sensor; the oil pump (9) is continuously adjusted to apply different loads to the dynamometer wheel pair (1), and the lateral force measuring device of the dynamometer wheel pair is calibrated until the entire calibration experiment is completed; S4. After completing the calibration experiment of the dynamometric wheelset (1), first start the oil pump (9) and adjust the bidirectional loader (5) to an unloaded position; then turn off the oil pump (9) to allow the wheel grip module (2) to release the wheel, and separate the assembled calibration device from the dynamometric wheelset (1), and then separate each component unit of the calibration device separately.

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