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Novel anti-blocking method and device for electric locomotive air channel relay

A technology for electric locomotives and relays, which is used in transportation and packaging, railway car body components, and railway vehicle heating/cooling. Reliable, easy-to-install effect

Inactive Publication Date: 2013-07-03
GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the widely used diaphragm air duct relays have common problems and defects such as low service life, poor reliability, contact ablation and random failure.

Method used

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  • Novel anti-blocking method and device for electric locomotive air channel relay
  • Novel anti-blocking method and device for electric locomotive air channel relay
  • Novel anti-blocking method and device for electric locomotive air channel relay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Air duct relays are installed in the seven air ducts of the four major ventilation and cooling systems of domestic main electric locomotives. Only have air duct relay to detect cooling fan in normal work, when the wind speed (wind pressure) of cooling air duct is normal, just allow other equipments such as main drive motor to put into work. However, there are generally used vane-type wind speed relays and diaphragm static pressure air duct relays at present: 1. The pressure measuring air inlet is easily blocked. Especially under the action of wind and snow in winter in northern or cold regions, the pressure measuring channel is frozen or blocked by snow powder, resulting in the failure of the air duct relay, which directly threatens the normal operation of the locomotive and requires frequent maintenance and replacement. 2. Due to the low pressure of the cooling air duct of the locomotive (<300Pa), the mass of the pressure-sensitive action part of the air duct relay cur...

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PUM

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Abstract

The invention relates to an anti-blocking method and a device for a railway electric locomotive air channel relay, and aims at common problems and defects that an air channel relay which is widely used currently is short in service life, and poor in reliability, and aims at the problems of contactor ablation, random failure and the like during usage of the air channel relay. The analysis shows that the random failure of the relay is caused by blocking of ice, snow powder and foreign matters, and the contactor ablation of the relay is thoroughly caused by vibration frequency ablation. Aiming at the defects, the invention provides an electric heating self-heating anti-blocking structure design for an air inlet, and a novel structure combining a micro-pressure membrane and a negative logic microswitch is arranged; meanwhile, a novel pressure joint type splicing fitting device is arranged; and the actual loading verifies that the anti-blocking method and the device disclosed by the invention overcome the conventional defects and are stable and reliable in operation.

Description

technical field [0001] The invention relates to an anti-clogging method and device for an air duct relay of a railway electric locomotive. Through the special design of the air inlet of the air duct relay, it is possible to prevent blockage in various cooling air ducts with ice, snow powder, dust, and debris-like foreign objects. Background technique [0002] As an important signal conversion device, the air duct relay is installed and used in the seven air ducts of the four major ventilation and cooling systems of the main electric locomotives in my country. However, the diaphragm air duct relays widely used at present have common problems and defects such as low service life, poor reliability, contact ablation and random failure. After analysis, it was found that the reason for the random failure of the relay was the blockage of ice, snow powder and foreign matter. The root cause of relay contact ablation is vibration frequency ablation. In view of the above defects, th...

Claims

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Application Information

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IPC IPC(8): B61D27/00
Inventor 屈圭
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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