A test platform and method for a traction drive system of a rail vehicle with adjustable inertial load

Abstract

The present invention discloses a test method for a traction drive system of a rail vehicle with adjustable inertial load. Based on a test platform for the traction drive system of a rail vehicle, the load is loaded and adjusted by means of inertial load adjusting devices on both sides of the output shaft of the gearbox, and the method includes the following steps: collecting relevant parameters of the simulated rail vehicle; calculating the load value to be loaded on the test bench; calculating the number of load elements to be equipped on the test bench; installing the load elements, controlling the test bench to conduct the test, and n equally distributing and installing the load elements on the first inertial load adjusting device and the second inertial load adjusting device, and using an operating console to control the traction motor for traction, uniform speed, coasting and braking, so as to conduct the test on the traction drive system of the rail vehicle. The test method of the present invention can quickly follow the change of the angular acceleration of the traction drive system, accurately simulate the load fluctuation phenomenon caused by the rapid change of the operating state of the traction drive system of the rail vehicle, and achieve high-precision test simulation.

Description

Technical Field

[0001] The present invention relates to the field of rail transit, and particularly to a test platform and method for a traction drive system of a rail vehicle with adjustable inertial load. Background Art

[0002] With the rapid development of rail transit, the demand for the design of high-performance traction drive systems has gradually increased. For this reason, engineers need to carry out a large number of dynamic tests and full-life cycle life tests in the laboratory. However, the existing test methods mainly apply load torque to the traction drive system by means of a counter-dragging motor and a magnetic powder brake, and cannot accurately simulate the actual operating state of the rail vehicle. The load torque provided by this test method is generally constant or preset according to a program, and cannot quickly follow the change of the angular acceleration of the traction drive system, and cannot simulate the load fluctuation phenomenon caused by the rapid change of the operating state of the rail vehicle traction drive system, making it difficult to meet the needs of high-precision dynamic performance tests. Summary of the Invention

[0003] The purpose of the present invention is to provide a test platform and method for a traction drive system of a rail vehicle with adjustable inertial load, and through a unique transmission system structure design and a specific test method, realize adjustable load loading with natural follow-up feedback of the angular acceleration of the traction drive system, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A test platform for a traction drive system of a rail vehicle with adjustable inertial load, comprising a first inertial load adjusting device, a second inertial load adjusting device, a gearbox, a driving motor, an axle, an operating platform and a base. Both left and right ends of the axle are mounted on the base through a second support seat, and the axle can rotate on the second support seat; the gearbox is connected to the axle, and the axle is the output shaft of the gearbox; the gearbox is connected to the driving motor through a second coupling, the side of the gearbox is connected to a third support seat, and the driving motor is connected to a fourth support seat. Both the third support seat and the fourth support seat are arranged on the base; both left and right ends of the axle are connected with a short shaft through a first coupling; both ends of the first inertial load adjusting device and the second inertial load adjusting device are mounted on the base through a first support seat, and the rotating shafts of the first inertial load adjusting device and the second inertial load adjusting device are short shafts; the operating platform is arranged on the base.

[0006] Further: The operating platform can control the traction, uniform speed, coasting and braking of the traction motor.

[0007] Further: Both the first inertial load adjusting device and the second inertial load adjusting device can rotate on the first support seat.

[0008] Further: Removable load elements are provided on both the first inertial load adjusting device and the second inertial load adjusting device, and the load element is a cylindrical structure with an installation hole at the center.

[0009] In the present invention, a test method for a traction drive system of a rail vehicle with adjustable inertial load is based on the above-mentioned test platform for the traction drive system of a rail vehicle, and its load is loaded and adjusted by using inertial load adjusting devices on both sides of the output shaft of the gearbox. The first inertial load adjusting device and the second inertial load adjusting device are adjusted by using inertial load elements.

[0010] Specifically, the physical principle on which the test method disclosed in the present invention depends is as follows.

[0011] P load ′ = P load

[0012] In the formula, P load ' is the equivalent inertial load of the test bench for the traction drive system of a rail vehicle, and P load is the inertial load borne by the simulated traction drive system of a rail vehicle.

[0013] For the case of an inertial element with a single mass, it is assumed that each load element of the test bench for the traction drive system of a rail vehicle has a weight of m and a radius of r.

[0014] The inertial load is loaded by quantitatively adjusting the load masses of the first inertial load adjusting device and the second inertial load adjusting device.

[0015] Specifically, a test method for a traction drive system of a rail vehicle with adjustable inertial load includes the following steps:

[0016] Step 1: Collect relevant parameters of the simulated rail vehicle. The parameters of the simulated rail vehicle collected include: the total weight M of the rail vehicle, the number N of wheel sets, and the nominal rolling circle radius R of the wheels.

[0017] Step 2: Calculate the load value that needs to be loaded on the test bench. Calculate the load value P according to the following formula load ,

[0018]

[0019] Step 3: Calculate the number of load elements that need to be equipped on the test bench. Calculate the number n of load elements that need to be installed on the inertial load adjusting device according to the following formula

[0020]

[0021] Step 4: Install the load elements, control the test bench to conduct tests, evenly distribute and install n load elements on the first inertial load regulating device and the second inertial load regulating device, and use the operation console to control the traction motor for traction, constant speed, coasting, and braking to conduct tests on the traction drive system of the rail vehicle.

[0022] As a further solution of the method of the present invention: The test method of the present invention is not limited to inertial elements of a single mass, and inertial elements of various masses can also be used in combination, as long as the physical principles disclosed in the present invention are satisfied.

[0023] Compared with the prior art, the test method for the traction drive system of the rail vehicle disclosed in the present invention can quickly follow the change of the angular acceleration of the traction drive system, accurately simulate the load fluctuation phenomenon caused by the rapid change of the operating state of the traction drive system of the rail vehicle, and achieve high-precision test simulation. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a test platform for the traction drive system of a rail vehicle with adjustable inertial load.

[0025] Figure 2 It is a schematic structural diagram of the load element in the test platform of the present invention.

[0026] Figure 3 It is a flow chart of a test method for the traction drive system of a rail vehicle with adjustable inertial load.

[0027] In the figure: 1. First support seat; 2. First inertial load regulating device; 3. First coupling; 4. Second support seat; 5.; 6. Gearbox; 7. Driving motor; 8. Axle; 9. Second inertial load regulating device; 10. Operation console; 11. Third support seat; 12. Second coupling; 13. Fourth support seat; 14. Base; 15. Load element. Detailed Embodiments

[0028] The technical solutions of this patent will be further described in detail below in conjunction with the specific embodiments. The following detailed description of the embodiments provided in the drawings of the present disclosure is not intended to limit the scope of the present disclosure claimed, but merely represents selected embodiments of the present disclosure.

[0029] Please refer to Figure 1, A test platform for a traction drive system of a rail vehicle with adjustable inertial load, comprising a first inertial load adjustment device 2, a second inertial load adjustment device 9, a gearbox 6, a drive motor 7, an axle 8, an operating console 10 and a base 14. Both left and right ends of the axle 8 are mounted on the base 14 through second support seats 4, and the axle 8 can rotate on the second support seats 4; The gearbox 6 is connected to the axle 8, and the axle 8 is the output shaft of the gearbox 6; The gearbox 6 is connected to the drive motor 7 through a second coupling 12, the side of the gearbox 6 is connected to a third support seat 11, the drive motor 7 is connected with a fourth support seat 13, and both the third support seat 11 and the fourth support seat 13 are arranged on the base 14; Both left and right ends of the axle 8 are connected with short shafts 5 through first couplings 3; Both ends of the first inertial load adjustment device 2 and the second inertial load adjustment device 9 are mounted on the base 14 through first support seats 1, and the rotating shafts of the first inertial load adjustment device 2 and the second inertial load adjustment device 9 are short shafts 5; The operating console 10 is arranged on the base 14.

[0030] The operating console 10 can perform traction, constant speed, coasting and braking control on the traction motor 7.

[0031] Both the first inertial load adjustment device 2 and the second inertial load adjustment device 9 can rotate on the first support seat 1.

[0032] Both the first inertial load adjustment device 2 and the second inertial load adjustment device 9 are provided with detachable load elements 15, and the load elements 15 are cylindrical structures with mounting holes in the center.

[0033] Preferably, in this embodiment, both the first support seat 1 and the second support seat 4 are bearing seats.

[0034] Preferably, the first inertial load adjustment device 2 and the second inertial load adjustment device 9 are respectively arranged on both sides of the axle 8.

[0035] Specifically, the drive load transfer path of the test platform in this embodiment is as follows: It is transmitted to the second coupling 12 and the gearbox 6 through the traction motor 7, and then is transmitted to the left and right sides respectively; That is, on the left side, it is transmitted to the first inertial load adjustment device 2 through the gearbox 6, the axle 8, the first coupling 3 and the short shaft 5; On the right side, it is transmitted to the second inertial load adjustment device 9 through the gearbox 6, the axle 8, the first coupling 3 and the short shaft 5.

[0036] Specifically, the load transfer path of the test bench is as follows: Inertial loads are added to the traction drive system through the first inertial load adjustment device 2 and the second inertial load adjustment device 9 to accurately simulate the load torque formed by the wheel adhesion of the rail vehicle, and the magnitude of the simulated load can be adjusted according to the increase or decrease of the number of load elements.

[0037] The first inertial load regulating device 2 and the second inertial load regulating device 9 are adjusted by using inertial load elements, and the structure of the load element 15 is as Figure 2 shown.

[0038] Specifically, the physical principle relied on by the test method disclosed in the present invention is as follows.

[0039] P load ′ = P load

[0040] In the formula, P load ' is the inertial load equivalent to the rail vehicle traction drive system test bench, and P load is the inertial load borne by the simulated rail vehicle traction drive system.

[0041] For the case of an inertial element with a single mass, it is assumed that each load element of the rail vehicle traction drive system test bench has a weight of m and a radius of r. By quantitatively adjusting the load mass of the first inertial load regulating device 2 and the second inertial load regulating device 9, inertial load loading is achieved. Specifically, the method includes the following steps:

[0042] Step 1: Collect relevant parameters of the simulated rail vehicle; the collected parameters of the simulated rail vehicle include: the total weight M of the rail vehicle, the number N of wheel sets, and the nominal rolling circle radius R of the wheels.

[0043] Step 2: Calculate the load value to be loaded on the test bench; calculate the load value P according to the following formula load ,

[0044]

[0045] Step 3: Calculate the number of load elements to be equipped on the test bench; calculate the number n of load elements to be installed on the inertial load regulating device according to the following formula

[0046]

[0047] Step 4: Install the load elements and control the test bench to conduct the test; evenly distribute and install n load elements on the first inertial load regulating device 2 and the second inertial load regulating device 9, and use the operation console 10 to control the traction motor 7 for traction, uniform speed, coasting, and braking to conduct the rail vehicle traction drive system test.

[0048] The test method of this embodiment is not limited to inertial elements with a single mass, and various masses of inertial elements can also be used in combination as long as the physical principle disclosed in the present invention is satisfied.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0050] The above detailed description is given to the preferred embodiments of the present patent. However, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the scope of knowledge of those of ordinary skill in the art.

Claims

1. An experimental platform for a traction drive system of a rail vehicle with adjustable inertial load, comprising a first inertial load adjustment device (2), a second inertial load adjustment device (9), a gearbox (6), a drive motor (7), an axle (8), an operation console (10) and a base (14). Characterized in that, Both left and right ends of the axle (8) are mounted on the base (14) through second support seats (4); the gearbox (6) is connected to the axle (8); the gearbox (6) is connected to the drive motor (7) through a second coupling (12), the side of the gearbox (6) is connected to a third support seat (11), the drive motor (7) is connected to a fourth support seat (13), and both the third support seat (11) and the fourth support seat (13) are arranged on the base (14). Both left and right ends of the axle (8) are connected with short shafts (5) through first couplings (3); both ends of the first inertial load adjustment device (2) and the second inertial load adjustment device (9) are mounted on the base (14) through first support seats (1), and the rotating shafts of the first inertial load adjustment device (2) and the second inertial load adjustment device (9) are short shafts (5); the operation console (10) is arranged on the base (14). The drive load transmission path of the experimental platform is as follows: It is transmitted through the drive motor (7) to the second coupling (12) and the gearbox (6), and then transmitted to the left and right respectively, that is, on the left side, it is transmitted to the first inertial load adjustment device (2) through the gearbox (6), the axle (8), the first coupling (3) and the short shaft (5), and on the right side, it is transmitted to the second inertial load adjustment device (9) through the gearbox (6), the axle (8), the first coupling (3) and the short shaft (5).

2. An experimental platform for a traction drive system of a rail vehicle with adjustable inertial load according to claim 1, Characterized in that, The operation console (10) can perform traction, constant speed, coasting and braking control on the traction motor (7).

3. An experimental platform for a traction drive system of a rail vehicle with adjustable inertial load according to claim 1, Characterized in that, Both the first inertial load adjustment device (2) and the second inertial load adjustment device (9) can rotate on the first support seat (1).

4. An experimental platform for a traction drive system of a rail vehicle with adjustable inertial load according to claim 1, Characterized in that, Both the first inertial load adjustment device (2) and the second inertial load adjustment device (9) are provided with detachable load elements (15).

5. An experimental method for a traction drive system of a rail vehicle with adjustable inertial load, based on the experimental platform according to any one of claims 1-4, and its load is loaded and adjusted by using inertial load adjustment devices on both sides of the output shaft of the gearbox, Characterized in that, It includes the following steps: (1) Collect relevant parameters of the simulated rail vehicle; (2) Calculate the load value that needs to be loaded on the test bench; (3) Calculate the number of load elements that need to be equipped on the test bench; (4) Install the load elements and control the test bench to conduct tests; evenly distribute and install n load elements on two inertial load adjustment devices, and use the operation console to control the traction motor for traction, constant speed, coasting, and braking, and conduct tests on the traction drive system of the rail vehicle.

6. A test method for the traction drive system of a rail vehicle with adjustable inertial load according to claim 5, wherein, the collected parameters of the simulated rail vehicle include: the total weight M of the rail vehicle, the number N of wheel sets, and the nominal rolling circle radius R of the wheels.

7. A test method for the traction drive system of a rail vehicle with adjustable inertial load according to claim 5, wherein, The calculation formula for the load value is as follows: P load For simulating the inertial load borne by the traction drive system of a rail vehicle.

8. A test method for the traction drive system of a rail vehicle with adjustable inertial load according to claim 5, wherein, The calculation formula for the number n of load elements that need to be installed in the inertial load adjustment device is as follows:

9. A test method for the traction drive system of a rail vehicle with adjustable inertial load according to any one of claims 5-8, wherein, it is not limited to inertial elements of a single mass, and inertial elements of various masses can also be used in combination as long as they satisfy the physical principles disclosed in the present invention.

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