CN204479310U - For the testing table of railway track and wheel hub relation test - Google Patents

Abstract

The utility model discloses a test bench for the railway wheel-rail relationship test, which comprises a frame supporting a linear slide rail, a moving gear ring slider supporting the linear slide rail, a planetary gear ring slider reversing mechanism, a frame and a gantry frame. The tested wheel set is placed on the steel rail of the test bench, the steel rail is connected with the reciprocating frame through fasteners, and the frame is supported on the linear slide rail installed on the ground. The reversing mechanism of the planetary gear ring slider is driven by the motor through the reduction box and the belt drive; during the rotation of the wheel set, it is loaded by the actuator on the loading gantry and the loading tool, simulating the movement of the wheel set during the operation of the vehicle. Stress situation. The utility model adopts the reversing mechanism of the planetary gear ring slider to realize the reciprocating motion of the rail, which is simple to control and does not need to change the steering of the motor, so that the impact on the gear and other mechanical systems can be effectively reduced on the one hand during the reversing process, and on the other hand On the one hand, it also greatly reduces the impact on the motor and electrical system.

Description

Test bench for railway wheel-rail relationship tests

technical field

The utility model relates to a wheel-rail relationship test device, in particular to a test bench for railway wheel-rail relationship tests.

Background technique

Wheel and rail wear is an important issue in the development of world railways. Test is an indispensable technical means to study wheel-rail wear. The research on wear test of wheel and rail mainly includes test bench test and circuit test. The latter is closer to the actual situation, but it is expensive, and it is not easy to test the influence of a certain factor on the wear of the wheel and rail independently. The test bench test is economical and fast, and it is convenient to test the influence of various factors on the wear of the wheel and rail separately. At the same time, the test can reach various extreme working conditions. Therefore, various forms of wheel-rail relationship test benches have been developed in the world to study wheel-rail wear.

Because it is difficult to simulate the track in the laboratory, the most common wheel-rail relationship test rig uses the wheel-wheel relationship test rig. Usually, a wheel made of one ratio is used to simulate the actual wheel, and a track with another diameter is used. The track wheel and the simulated wheel are driven by motors respectively, and the speeds of the two motors are continuously controllable, so that the wheels and the track wheel can achieve different speeds, and when the track wheel drives the simulated wheel, the brake can be realized. The simulation of traction conditions can be realized when the simulated wheels drive the rail wheels. This form of test bench has simple control and high simulation speed, but it has been proved from theory that there is a large error in the test using the wheel-wheel relationship instead of the wheel-rail relationship, and it cannot reflect the real situation between the wheel and the rail. . For this reason, foreign countries have begun to develop test benches based on the real wheel-rail relationship. In 2005, the German Federal Railway Research Center developed a new type of turnout test bench. The test rig uses actual switches and wheels for testing. The turnout is installed on a slider that can reciprocate in a straight line. The slider drives the reciprocating motion through the crank, thereby driving the reciprocating movement of the turnout, and the turnout drives the wheels to rotate to realize the simulation of the vehicle driving situation. In 2009, the Japan Railway Technology Research Center developed a new type of wheel-rail creep rate test device. The motor drives the ball screw mechanism forward and reverse to drive the bogie to make a linear reciprocating motion on the rail to realize the simulation of the vehicle driving situation.

In the above two wheel-rail relationship test benches, the former uses a crank slider to realize the reciprocating motion of the track. It is well known that even if the crank rotates at a constant speed, the speed of the slider changes all the time, and the slider cannot maintain a uniform motion. If this mechanism is used as the transmission mechanism of the test bench, it cannot accurately simulate the uniform motion condition in the actual operation of the vehicle. It can be seen from the structural characteristics of this mechanism that if the reciprocating stroke of the track is to be increased, the length of the crank and the connecting rod will be increased. The latter is to drive the bogie to reciprocate on the track through the motor-driven ball screw mechanism, so it is necessary to control the motor to continuously change direction, and buffering and other requirements need to be considered, which is more troublesome.

Of course, rack and pinion mechanisms, hydraulic motor transmission mechanisms, hydraulic cylinder reciprocating mechanisms, etc. can also be used to realize reciprocating motion. These mechanisms are widely used in the industrial field, but these mechanisms have disadvantages such as the linear reciprocating stroke is not easy to change, and the reversing process has a large impact on the system.

Utility model content

The purpose of this utility model is to provide a test bench that can realize the real wheel-rail relationship test. This kind of test bed directly adopts the wheel-rail contact method for testing, which can reflect the real wheel-rail relationship. The reciprocating motion control is simple, and the motor does not need Reversing, small impact, easy maintenance, suitable for long-term work.

The utility model is achieved by constructing a test bench for the railway wheel-rail relationship test, which is characterized in that it includes a frame supporting a linear slide rail, a moving gear ring slider supporting a linear slide rail, a planetary gear ring slider changing Reversing mechanism, frame and gantry frame; the planetary gear ring slider reversing mechanism includes driving sprocket, tie rod, driven sprocket, planetary gear, movable gear ring slider, and the movable gear ring slider is installed on the mobile The gear ring slider supports the linear slide rail and is supported by the moving gear ring slider. The gear ring slider is equipped with a motor, a bevel gear reducer and a transmission belt. The motor is connected to the bevel gear reducer through a coupling. The output end of the bevel gear reducer drives the drive sprocket to rotate through the transmission belt. The motor, bevel gear reducer, drive belt and drive sprocket are all set on the mounting plate. The drive sprocket is transmitted to the passive sprocket through the chain transmission. The gears are coaxial, the driven sprocket and the planetary gear are supported by tie rods, the mounting plate is fixed by tie rods, the planetary gears mesh with the internal gear tooth profile of the ring slider, and the frame is supported on the frame support linear slide rail and is driven by the reversing mechanism of the planetary gear ring slider to realize reciprocating motion. The steel rail is installed on the reciprocating frame through fasteners, and the tested wheel set is placed on the steel rail. Reverse rotation; there is a gantry above the frame, a vertical loading actuator is installed on the beam of the gantry, and a lateral actuator is installed on the column of the gantry, and the loading is set by the vertical loading actuator and the lateral actuator. The tooling is used to load the wheel set to be tested by loading the tooling to complete the simulation of the vehicle operating conditions.

A test bench for railway wheel-rail relationship test according to the utility model is characterized in that: the steel rail on the frame is a turnout structure.

A control method of the test bench used for the railway wheel-rail relationship test described in the utility model, through the operation and rotation of the motor, connecting the bevel gear reduction box through the coupling, and the belt transmission to transmit the power to the reversing mechanism of the planetary gear ring slider The driving sprocket at the input end is transmitted to the passive sprocket through chain transmission. The passive sprocket is coaxial with the planetary gear. Through the continuous rotation of the planetary gear in the closed ring slider, the inner gear of the planetary gear and the ring slider The meshing of the tooth profile and the restraint of the gear ring slider on the planetary gear shaft can drive the gear ring slider to reciprocate and linearly move with a low friction coefficient, thereby driving the reciprocating motion of the frame through the gear ring slider and driving the upper rail to reciprocate The reciprocating motion of the rail can realize the reciprocating rotation of the wheel set and simulate the reciprocating operation of the vehicle on the rail.

A test bench for wheel-rail relationship test described in the utility model, the rail is installed on the reciprocating frame through fasteners, the frame is supported on the linear slide rail, and the frame is slid by the planetary gear ring at its lower part The movable gear ring slider in the block reversing mechanism is driven to realize reciprocating motion, and the movable gear ring slider is supported by the linear slide rail supported by the mobile gear ring slider installed on the ground. The wheel set to be tested is placed on the rail, and the forward and reverse rotation of the wheel set is realized by the reciprocating motion of the rail. The loading gantry is installed on the ground and is located in the middle of the test bench. Two vertical loading actuators are installed on the beam, and two lateral actuators are installed on the columns. Load to complete the simulation of vehicle operating conditions.

Since the reversing mechanism of the planetary gear ring slider is used to realize the linear reciprocating motion of the gear ring slider without changing the direction of the motor, the impact on the gear and other mechanical systems can be effectively reduced on the one hand during the reversing process, and on the other hand , It also greatly reduces the impact on the motor and electrical system. At the same time, the test reciprocating stroke can be changed by changing the linear stroke of the ring slider.

Compared with the prior art, the utility model has the beneficial effects of:

1. The method of the utility model adopts the reversing mechanism of the planetary gear ring slider to realize the reciprocating motion of the rail, which is easy to control and does not need to change the steering of the motor, so that on the one hand, it can effectively reduce the impact on the mechanical system such as gears during the reversing process. Shock, on the other hand, also greatly reduces the impact on the motor and electrical system.

2. The motion speed of the frame in the straight line section of the gear ring slider is constant, which is consistent with the actual vehicle operating conditions.

3. Increasing the length of the straight line section of the gear ring slider can change the running length of the tested track.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment

In the figure: 1. The frame supports the linear slide rail; 2. The mobile gear ring slider supports the linear slide rail; 3. The motor; 4. The bevel gear reducer; 5. The transmission belt; 6. The driving sprocket; 7. The tie rod; 8 , passive sprocket; 9, planetary gear; 10, movable gear ring slider; 11, frame; 12, tested wheel set; 13, lateral loading actuator (4); 14, loading tooling; 15, vertical To load the actuator; 16, the gantry; 17, the rail.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is a kind of specific embodiment of the utility model is: a kind of test bench for railway wheel-rail relationship test, including frame supporting linear slide rail 1, moving gear ring slider supporting linear slide rail 2, planetary gear ring Slider reversing mechanism, frame 11 and gantry 16. The planetary gear ring slider reversing mechanism includes a driving sprocket 6 , a tie rod 7 , a driven sprocket 8 , a planetary gear 9 , and a movable gear ring slider 10 . The movable gear ring slider 10 is installed on the ground movable gear ring slider supporting linear slide rail 2 and is supported by the mobile gear ring slider supporting linear slide rail 2 . The gear ring slider 10 is provided with a motor 3, a bevel gear reducer 4 and a transmission belt 5, the motor 3 is connected to the bevel gear reducer 4 through a coupling, and the output end of the bevel gear reducer 4 drives the driving sprocket 6 to rotate through the transmission belt 5 , The motor 3, the bevel gear reduction box 4, the transmission belt 5 and the driving sprocket 6 are all arranged on the mounting plate 18. The driving sprocket 6 is transmitted to the driven sprocket 8 through chain transmission, the driven sprocket 8 is coaxial with the planetary gear 9, and the driven sprocket 8 and the planetary gear 9 are supported by the tie rod 7. The mounting plate 18 is fixed by the tie rod 7 , and the planetary gear 9 meshes with the internal gear tooth profile of the ring gear slider 10 . The frame 11 is supported on the frame supporting linear slide rail 1 and is driven by the planetary ring slider reversing mechanism to realize reciprocating motion. In the utility model, the steel rail 17 is installed on the reciprocating frame 11 through fasteners. The tested wheel set 12 is placed on the rail 17, driven by the reciprocating motion of the steel rail 17 to realize the positive and negative rotation of the wheel set 12; a gantry 16 is arranged above the frame 11, and a vertical loading actuator 15 is installed on the beam of the gantry 16 , the gantry 16 is equipped with lateral actuators 13 (4 pieces) on its column, and the loading tool 14 is set through the vertical loading actuator 15 and the lateral actuator 13, and the wheel set 12 to be tested is realized by the loading tool 14 Load to complete the simulation of vehicle operating conditions.

Working process and principle of the present utility model are:

Referring to the structural diagram of the utility model in Fig. 1, the tested wheel pair 12 is placed on the steel rail 17 of the test bench, and the steel rail 17 is connected with the reciprocating frame 11 through fasteners, and the frame 11 is connected by a planetary gear ring slider installed on its lower part. Mechanism 6,7,8,9,10 drive. When the motor 3 is running and rotating, it is connected to the bevel gear reducer 4 and the transmission belt 5 through the coupling to transmit the power to the reversing mechanism of the planetary ring slider, and the movable gear ring slider 10 drives the reciprocating motion of the frame 11. In this way, the steel rail 17 on it is driven to reciprocate, and the reciprocating motion of the steel rail 17 can realize the reciprocating rotation of the wheel set 12, simulating the reciprocating operation condition of the vehicle on the steel rail.

Due to the use of the reversing mechanism of the planetary gear ring slider, the reversing of the test bench no longer requires the motor 3 to change the running direction. During the rotation process of the wheel set 12, it is loaded by the actuators 13, 15 and the loading tool 14 on the loading gantry 15, simulating the force situation of the wheel set during the operation of the vehicle. Movable parts such as frame 11 and gear ring slider 10 are supported on linear slide rails 1 and 2 respectively.

The control method of the test bench used for the railway wheel-rail relationship test described in the utility model is as follows, the motor 3 runs and rotates, connects the bevel gear reduction box 4 and the belt drive 5 through the coupling, and transmits the power to the planetary ring slider for reversing The driving sprocket 6 at the input end of the mechanism is transmitted to the passive sprocket 8 through chain transmission, the passive sprocket 8 is coaxial with the planetary gear 9, and the planetary gear 9 meshes with the internal gear tooth profile of the gear ring slider 10 and the restraint effect of the gear ring slider 10 on the planetary gear 8 shaft can drive the gear ring slider 10 to reciprocate and linearly move with a low friction coefficient, thereby passing through the gear ring The slider 10 drives the reciprocating motion of the frame 11 and drives the upper rail 17 to reciprocate. The reciprocating motion of the rail 17 can realize the reciprocating rotation of the wheel set 12, simulating the reciprocating operation condition of the vehicle on the rail.

During the rotation process of the wheel set 12, it is loaded by the actuators 13, 15 and the loading tool 14 on the loading gantry 15, simulating the force situation of the wheel set during the operation of the vehicle.

The linear section of the gear ring slider 10 can be composed of different segments, and changing the number of segments and the effective length of the segments can easily change the stroke of the linear reciprocating motion without increasing the power of the motor.

Changing the rotating speed of the motor can change the speed of the reciprocating motion of the slider, thereby changing the running speed of the wheel set. Due to the use of the reversing mechanism of the planetary gear ring slider, the reversing of the test bench no longer requires the motor 3 to change the running direction. Therefore, during the commutation process, on the one hand, the impact on mechanical systems such as gears can be effectively reduced, and on the other hand, the impact on the motor and electrical systems can also be greatly reduced. Therefore, it is especially suitable for long-term continuous working wheel-rail wear test conditions.

The test stand can also adopt the known wheel set 12 to carry out the test process to the steel rail 17. If the steel rail 17 on the frame 11 is directly replaced with a special line section form such as a turnout, the wheel-rail relationship simulation for components such as a turnout or under special line conditions can also be realized.

Claims (2)

1., for a testing table for railway track and wheel hub relation test, it is characterized in that: include frame supported linear slide rail (1), mobile ring gear slider support linear slide rail (2), planetary gear ring slide block reverse mechanism, framework (11) and portal frame (16), described planetary gear ring slide block reverse mechanism comprises drive sprocket (6), tie-rod (7), by movable sprocket (8), planet wheel (9), removable ring gear slide block (10), removable ring gear slide block (10) is arranged on mobile ring gear slider support linear slide rail (2) and goes up and supported by mobile ring gear slider support linear slide rail (2), motor (3) is provided with in ring gear slide block (10), reduction gearbox of bevel gear (4) and driving-belt (5), motor (3) is connected to reduction gearbox of bevel gear (4) by shaft coupling, reduction gearbox of bevel gear (4) output terminal drives drive sprocket (6) to rotate by driving-belt (5), motor (3), reduction gearbox of bevel gear (4), driving-belt (5) and drive sprocket (6) are all arranged on installing plate (18), drive sprocket (6) is delivered to by movable sprocket (8) by Chain conveyer, coaxial with planet wheel (9) by movable sprocket (8), supported by tie-rod (7) by movable sprocket (8) and planet wheel (9), described installing plate (18) is fixed by tie-rod (7), described planet wheel (9) engages with the internal gear tooth of ring gear slide block (10), described framework (11) is supported on frame supported linear slide rail (1) and goes up and realize to-and-fro movement by described planetary gear ring slide block reverse mechanism driving, rail (17) is arranged on reciprocating framework (11) by fastener, be placed on rail (17) by experimental wheel to (12), driven by rail (17) to-and-fro movement and realize the positive and negative rotation of wheel to (12), framework (11) top is provided with portal frame (16), portal frame (16) its crossbeam is provided with Plumb load actuator (15), portal frame (16) its column is provided with horizontal actuator (13), being arranged by Plumb load actuator (15) and horizontal actuator (13) and load frock (14), realizing taking turns the loading of (12) to complete the simulation of running conditions of vehicle tested by loading frock (14).

2. a kind of testing table for the test of railway track and wheel hub relation according to claim 1, is characterized in that: described framework (11) above rail (17) is switch structure.