Permanent magnet direct-drive bogie and rail vehicle thereof

Abstract

A permanent magnet direct-drive bogie and a rail vehicle thereof are disclosed. The permanent magnet direct-drive bogie comprises a frame (1), a wheel set (2), and a permanent magnet motor (3); the frame (1) comprises a longitudinal beam (11), a cross beam (12) perpendicular to the longitudinal beam (11), and end beams (13) arranged at both ends of the longitudinal beam (11); a hollow shaft (4) is sleeved on an axle (21) of the wheel set (2), a force transmission seat (5) is fixed on the axle (21), the permanent magnet motor (3) is sleeved on the hollow shaft (4), one end of the hollow shaft (4) is connected to the permanent magnet motor (3) through a flexible coupling (6), and the other end of the hollow shaft (4) is connected to the force transmission seat (5) through a flexible coupling (6); both longitudinal sides of the cross beam (12) are provided with protrusions (121); the permanent magnet motor (3) is flexibly connected to the frame (1) through a swing rod (7) and a suspension rod (17), one end of the swing rod (7) is hung on the protrusion (121), the other end is connected to a housing of the permanent magnet motor (3), and the axis of the swing rod (7) is arranged longitudinally; one end of the suspension rod (17) is connected to the housing of the permanent magnet motor (3), and the other end is suspended on the end beam (13); and the permanent magnet motor (3) is laterally movable.

Description

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS[0001]Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet as filed with the present application are hereby incorporated by reference under 37 CFR 1.57.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention belongs to the field of rail vehicles, and specifically relates to a permanent magnet direct-drive bogie and a rail vehicle thereof.Description of the Related Art[0003]At present, high-speed locomotives at home and abroad, which use drive systems with gear transmissions, have the problems of complex structure, large transmission loss and low reliability, and especially it is difficult to solve the lubrication and sealing problems in high-speed operation. At the same time, the high-speed locomotives also have the problems of high noise, high maintenance cost, etc.[0004]With the advancement of permanent magnet motor technology, direct drive is ...

AI Technical Summary

Benefits of technology

The patent text describes a solution for improving the performance and reducing the maintenance costs of high-speed locomotives. By using a permanent magnet motor and a cross beam with protrusions, the distance between the cross beam and the motor is shortened, which reduces the length of the swing rod and the amplitude of swinging during operation. This solution also addresses issues such as vibration, axle load, and traction point. Additionally, the use of a coupling and low-position traction further enhances the performance of the motor. Overall, this solution improves the efficiency and reliability of high-speed locomotives as a power source.

Problems solved by technology

At present, high-speed locomotives at home and abroad, which use drive systems with gear transmissions, have the problems of complex structure, large transmission loss and low reliability, and especially it is difficult to solve the lubrication and sealing problems in high-speed operation.

At the same time, the high-speed locomotives also have the problems of high noise, high maintenance cost, etc.

The hub direct drive or wheel side direct drive can only be used for light rail vehicles because of low motor power, but cannot be applied to high-power locomotives or Multiple Units.

The above patents all belong to the structural form of a direct-drive bogie, in which the motor is directly elastically or inelastically suspended on the axle, the mass of the permanent magnet motor is entirely the unsprung mass, the axle of the vehicle is heavy, and the unsprung mass has a great impact on vertical and lateral dynamic forces of a wheel rail, so that it is difficult to increase the speed of the vehicle to a high speed, and the direct-drive bogie is not suitable for high-speed locomotives with higher speeds than EMUs.

Moreover, once the speed increases, the vibration will be greater, which will affect the service life of the permanent magnet motor.

At the same time, due to the disadvantages of the structure designs of the above patents, the distance between the permanent magnet motor and the frame beam is large, a long swing rod is required, and the amplitude of the permanent magnet motor is too large during operation, so damage to the motor is easily caused.

However, the frame suspension is rigid frame suspension, the suspension of the permanent magnet motors is not decoupled, and the vibration during operation will have an excessive impact on the permanent magnet motors.

Besides, the existing permanent magnet direct-drive bogies with high traction points are not suitable for high-speed locomotives under high-power and high-traction conditions.

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