CN201092264Y - Novel underground tractor electrical transmission means - Google Patents

Abstract

The utility model relates to a subway tractor electric transmission system, in particular to a novel subway tractor electric transmission system for resolving the air and noise pollutions of subway internal combustion tractor. The utility model comprises a driver controller, a diesel engine, a synchronous main generator and a rectifier connected with the output of the synchronous main generator, wherein the exciting coil of the synchronous main motor is arranged with a power-constant exciting arrangement, the output of the rectifier is connected with a traction motor via a contactor. The utility model further comprises a pantograph and a chopper connected with the pantograph, wherein the chipper is arranged with a pulse generator, which output is connected with the traction motor via a contactor, the trigger signals of the power-constant exciting arrangement and the pulse generator are connected with a control power supply via a control conversion switch. The subway tractor electric transmission system can supply power at two paths, with high flexibly, environment protection, reduce pollution of diesel engine, easy traction and improved subway service quality.

Description

Electric transmission device of new subway tractor

technical field

The utility model relates to an electric transmission system of a subway traction vehicle, in particular to a novel electric transmission device of a subway traction vehicle.

Background technique

The subway traction locomotive is a necessary traction power equipment for subway construction and operation units. With the vigorous development of urban rail transit in my country, the construction projects of subways are becoming more and more extensive, and the operating mileage is increasing day by day, so the demand for traction locomotives for subways will increase significantly. At present, the existing subway traction locomotives are all internal combustion traction locomotives, and most of them use hydraulic transmission, while electric transmission has just started. Although the existing internal combustion vehicles have different transmission methods, they all use diesel engines as the sole power source. The air and noise pollution caused by subway tunnels is unavoidable and has become a difficult problem for subway operators.

Contents of the invention

The utility model aims to solve the problem of air and noise pollution to subway tunnels caused by existing subway internal combustion traction locomotives, and is specifically a novel electric transmission device for subway tractors.

The utility model is realized by adopting the following technical scheme: the electric transmission device of the new subway tractor, including the driver controller AC, the diesel engine CYJ controlled by the driver controller AC, the synchronous main generator GS, and the output terminal of the synchronous main generator GS The connected rectifier 2UR, the excitation coil of the synchronous main generator GS is equipped with a constant power excitation device Iw controlled by the driver controller AC, the output end of the rectifier 2UR is connected with the traction motor M through the contactor KM, and also includes the lifting driver controller The AC-controlled pantograph AP and the chopper 1UR connected to the pantograph AP, the chopper 1UR is equipped with a pulse generator Up controlled by the driver controller AC, and the output terminal of the chopper 1UR passes through the contactor KM It is connected with the traction motor M, and the trigger signal terminal of the constant power excitation device Iw and the pulse generator Up is connected with the control power supply Uc through the control switch SA.

When the subway power supply grid line (overhead network) is normal, the pantograph AP of the tractor is raised to contact the power grid line through the driver controller AC, and the grid energy is transmitted to the chopper 1UR, which is transformed by the chopper 1UR Afterwards, it is sent to the traction motor M to realize the traction operation; when the subway power supply grid line fails or when there is no grid section running, the diesel engine CYJ of the tractor is started through the driver controller AC, and the direct current is generated through the synchronous main generator GS-rectifier 2UR , to the traction motor M to realize the traction operation; among them, the driver controller AC is responsible for generating the driver’s control command signal Ug, which is respectively sent to the constant power excitation device Iw and the pulse generator Up to generate constant power or constant speed running control signals ; The constant power excitation device Iw is responsible for controlling the excitation current of the synchronous main generator GS. Under the operating condition of the diesel engine, it controls the power of the diesel engine according to the feedback signals Uf and If, so that the whole vehicle can run at constant power and play the best power of the diesel engine. ; The pulse generator Up produces the pulse signal Pulse of the straight chopper 1UR according to the feedback signal Uf, If, and then controls the voltage of the traction motor, adjusts the motor speed, and makes the tractor run according to the constant speed characteristic; The selector switch for selecting the above two power supply working conditions generates the working condition conversion signal A or B, and has an interlock function to ensure that the tractor has one and only one working condition to be put into operation under any condition. The driver controller AC controls the lifting of the pantograph AP through the lifting bow circuit, and the lifting bow circuit is a known technology, so it is not described in the specification.

Compared with the prior art, on the basis of AC-DC transmission system of diesel locomotive, the utility model adds pantograph and DC chopper power supply, so that the subway tractor has diesel engine-main generator, overhead network-chopper With the double-circuit power supply structure, the driver only needs to control the changeover switch SA to switch, and then he can choose the diesel engine or the wire network power supply operation mode according to the specific operation conditions of the subway to achieve the best operation effect. That is to make full use of the existing wire power supply network of the subway to provide clean power for the tractors; only when the power supply network fails, the diesel engine is used to provide power, which can greatly reduce the air pollution and noise interference caused by the diesel engine to the subway tunnel. Provide traction power for subway station yard shunting, emergency rescue, and construction operations in a timely manner.

The utility model has dual-circuit power supply, is flexible, convenient to operate, clean and environment-friendly, can greatly reduce air and noise pollution brought by diesel engines to subway tunnels, facilitates traction operations of subway users, and effectively improves the quality of subway operation.

Description of drawings

Fig. 1 is a schematic circuit diagram of the utility model;

Detailed ways

The electric transmission device of the new subway tractor includes the driver controller AC, the diesel engine CYJ controlled by the driver controller AC, the synchronous main generator GS, and the rectifier 2UR connected to the output end of the synchronous main generator GS, and the synchronous main generator GS The excitation coil is equipped with a constant power excitation device Iw controlled by the driver controller AC, the output terminal of the rectifier 2UR is connected with the traction motor M through the contactor KM, and also includes the pantograph AP whose lifting is controlled by the driver controller AC, and the connected The chopper 1UR connected to the pantograph AP is equipped with a pulse generator Up controlled by the driver controller AC, the output end of the chopper 1UR is connected to the traction motor M through the contactor KM, and the constant power excitation device Iw The trigger signal end of the pulse generator Up is connected to the control power supply Uc through the control switch SA.

In the diesel engine operation mode, the subway tractor has its own traction power, which has greater maneuverability, and can meet the operation of the subway tractor in the grid failure or no-grid section; in the wire network operation mode, the tractor relies on The existing power supply network of the subway provides clean energy, which effectively reduces the air and noise pollution in the tunnel, and meets the increasingly stringent requirements of the subway operators for environmental protection indicators. It is a new type of subway traction power device that is flexible, easy to use and clean in power.

The electric transmission device of the subway tractor described in the utility model has the following characteristics:

1. Two power supply methods, realizing one machine with two functions

Adopting two power supply methods of subway power supply network and internal combustion diesel engine, users can flexibly choose the power supply mode according to the specific operating conditions. Energy tractor.

2. Higher environmental protection and economy.

Due to the pantograph power supply method, clean electric energy can be used to provide power, which greatly reduces the pollution of the tractor to the subway tunnel and improves the environmental protection index of the subway operation; at the same time, the running time of the diesel engine is relatively reduced, and the operating cost of the user will be reduced. Significantly reduced, the operating economy has been improved.

3. The system is flexible in operation and quick in conversion.

The driver only needs to use the working condition switch to switch between the two working conditions according to the actual situation. The switching operation is simple and fast, and the use is convenient and flexible.

4. Higher operational reliability and longer life cycle

When one power supply mode fails, the driver can switch to another working mode to maintain operation, thereby reducing the busy time of tractor failure; at the same time, due to the respective work of the two devices of diesel engine + synchronous main engine and pantograph + chopper The time is relatively reduced, thereby prolonging the service life of the tractor.

Under the premise of little change in device cost, the utility model enables a traction locomotive to have two operating modes with different characteristics, flexible operation, and simple and convenient control. The whole vehicle has good environmental protection, low operating cost, high reliability and long life cycle. It is an environmentally friendly, economical, reliable and advanced traction power device. It is expected to be popularized and applied in the fields of subway tractors and subway rescue vehicles.

Claims (1)

1. A new electric transmission device for subway tractors, including driver controller AC, diesel engine CYJ controlled by driver controller AC, synchronous main generator GS, and rectifier 2UR connected to the output end of synchronous main generator GS, synchronous main generator The excitation coil of the generator GS is equipped with a constant power excitation device Iw controlled by the driver controller AC, and the output terminal of the rectifier 2UR is connected with the traction motor M through the contactor KM. The pantograph AP and the chopper 1UR connected to the pantograph AP, the chopper 1UR is equipped with the pulse generator Up controlled by the driver controller AC, the output of the chopper 1UR is connected to the traction motor M through the contactor KM The constant power excitation device Iw and the trigger signal end of the pulse generator Up are connected to the control power supply Uc through the control switch SA.