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Hydraulic hybrid power rail vehicle driving device based on pump/motor and electric machine

A hybrid and rail vehicle technology, applied in power units, vehicle components, transportation and packaging, etc., can solve the problem of low utilization efficiency of regenerative braking energy, and achieve the effect of avoiding the increase of traction network pressure and improving work efficiency.

Inactive Publication Date: 2015-10-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulic hybrid rail vehicle drive device based on a pump / motor and an electric motor in order to overcome the problem of low utilization efficiency of regenerative braking energy of traditional rail vehicles

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  • Hydraulic hybrid power rail vehicle driving device based on pump/motor and electric machine

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0013] See attached figure 1 , a hydraulic hybrid rail vehicle drive device based on a pump / motor and a motor, which includes: wheels 2, a final drive 3, and it also includes: a pump / motor 1, a traction motor 4, a high-pressure accumulator 6, and a low-pressure accumulator 5. Relief valve 7, oil tank 8 and traction grid;

[0014] The overall connection relationship is: on the one hand, the pump / motor 1 is connected to the high-pressure accumulator 6 and the low-pressure accumulator 5 through independent oil inlets and outlets; on the other hand, it drives the wheels through the final reducer 3 on the bogie 2. The traction motor 4 is connected to the traction grid on the one hand, and drives the wheels 2 through the final reducer 3 on the bogie on the other hand; an overflow valve 7 is provided between the pump / motor 1 and the high-pressure ac...

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Abstract

The invention relates to a hydraulic hybrid power rail vehicle driving device based on a pump / motor and an electric machine. According to the technical scheme, the pump / motor is connected with a high-pressure energy accumulator and a low-pressure energy accumulator and is connected to a main speed reducer on a steering frame to drive a wheel; a traction motor is connected with a traction power grid, and is connected to the main speed reducer on the steering frame; and an overflow valve is arranged between the pump / motor and the high-pressure energy accumulator, and is communicated with an oil tank. The displacement of the pump / motor is adjusted, so that the driving torque and the brake torque can be adjusted according to train loads, and the working efficiency of a transmission system is improved.

Description

technical field [0001] The invention relates to a rail vehicle driving device, in particular to a hydraulic hybrid rail vehicle driving device. Background technique [0002] The urban rail transit system has very good benefits as the main line transportation of modern metropolises with a population of more than one million. However, due to the huge traffic volume, its traction energy consumption is very large; Save considerable energy. However, the electric energy fed back by regenerative braking will lead to many problems such as an increase in the grid voltage. Although the use of resistors can consume the excess feedback electric energy, the energy-saving effect is very poor; restricted by the performance of the battery, the development of battery energy storage is slow; and the flywheel is difficult to manufacture. Maintenance, and it is not suitable for long-term energy storage; the technology required for hydraulic hybrid power is relatively mature, and the power dens...

Claims

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Application Information

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IPC IPC(8): B60K8/00B60T1/10
CPCB60K8/00B60T1/10
Inventor 吴维张刘杨苑士华胡纪滨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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