Protective device of filter for rail transit locomotive

Abstract

The invention discloses a protective device of a filter for a rail transit locomotive, and relates to the field of filters for rail transit locomotives. The protective device comprises a power supply filter, an outer box body and a cross arm; the cross arm is fixedly connected to the inner wall of the outer box body, the upper side and the lower side of the cross arm are fixedly connected with an upper protective shell and a lower protective shell respectively; the power supply filter is located in the upper protective shell, and is arranged on the cross arm and connected to the cross arm in a rolling mode through the rolling wheels. Herein, the components in the filter can be effectively protected by filling the power supply filter with insulating oil, so that a good buffering effect is achieved when the filter shakes; meanwhile, the hot oil in the filter can be exchanged with external cold oil through circulation of the insulating oil, and the heat dissipation effect is greatly enhanced. Through special structural arrangement, buffering protection is achieved under the condition that a spring is not used, shaking force of the filter is converted into driving force for exchanging the insulating oil, the shaking amplitude is reduced, the filter is protected, and the insulating oil can circulate without an additional power source.

Description

technical field [0001] The invention relates to the field of filters for rail transit locomotives, in particular to a protective device for filters for rail transit locomotives. Background technique [0002] Power supply filters generally generate more heat, especially for rail transit locomotives, which consume more power. Therefore, the power of filters for locomotives is also higher, and the heat is particularly serious. [0003] Generally, the filter is fixedly connected to the inner side of the metal case by bolts. Whether liquid cooling or air cooling is used for heat dissipation, the outer surface of the device is cooled, and the effect is relatively general. And because the device itself is shaking, if liquid cooling is used, the liquid cooling will not be able to adhere to the surface of the device (because there must be room for the device to shake), which will reduce the cooling effect. [0004] At the same time, during the running of the rail transit locomotive,...

AI Technical Summary

Problems solved by technology

The shaking of the power filter will affect its own performance; especially the inductance of the inductor and the capacitance of the capacitor in the filter will change greatly due to the shaking, resulting in unstable working performance of the filter

[0005] At present, the commonly used buffering method is to use full spring buffering or partial spring buffering. Spring buffering has two disadvantages. One is that the spring itself will not dissipate energy, nor will it transfer energy, which will cause the spring to transfer energy to the The second is that the spring cannot determine the direction. When shaking, the spring will also be skewed. If a guide rod is added to prevent the spring from being skewed inside the spring, it will limit the shaking in other directions

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