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Ventilator for electric locomotive

A technology for electric locomotives and ventilators, which is applied to machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of low efficiency, small dimensions, and large gaps of ventilators, so as to improve electrical power, static pressure and efficiency. Enhanced, compact effect

Active Publication Date: 2014-11-26
CRRC DALIAN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the installation size of railway electric locomotives, the fans used in existing railway electric locomotives cannot be designed according to conventional products, and the overall dimensions are generally small; at the same time, because the fans are installed in the locomotive, they will bear the heat from the rails and the locomotive body. In order to avoid the collision between the impeller and the fan, the gap between the two is larger than that of the conventional fan.
Generally, the fan efficiency is inversely proportional to the gap, which leads to the low efficiency of the fans used in railway electric locomotives

Method used

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  • Ventilator for electric locomotive
  • Ventilator for electric locomotive
  • Ventilator for electric locomotive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] When the number of blades 31 of the impeller 3 of the fan is 9, the number of rear guide vanes 52 is 11, and there is no front guide vane 11, the flow rate is 4.7m 3 / s, the static pressure (equivalent to 1250Hz) is 1874Pa, the apparent power (equivalent) is 15.7kVA, and the static pressure efficiency is 67.6%.

Embodiment 2

[0044] When the number of blades 31 of impeller 3 of the fan is 9, the number of rear guide vanes 52 is 11, and the number of front guide vanes 11 is 5, β=23°, γ=46°, and the flow rate is 4.7m 3 / s, the static pressure (equivalent to 1250Hz) is 2164Pa, the apparent power (equivalent) is 16.9kVA, and the static pressure efficiency is 73.2%.

Embodiment 3

[0046] When the number of blades 31 of the impeller 3 of the fan is 9, the number of rear guide vanes 52 is 11, and the number of front guide vanes 11 is 13, β=20°, γ=40°, and the flow rate is 4.7m 3 / s, the static pressure (equivalent to 1250Hz) is 2422Pa, the apparent power (equivalent) is 17.46kVA, and the static pressure efficiency is 79.5%.

[0047] From the above results, it can be seen that the combined design of the shroud 1, the leading vane 11 and the tapered opening air cylinder in the present invention is particularly suitable for being installed at the front of the impeller of the meridional acceleration fan, and the effect is remarkable.

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Abstract

The invention discloses a ventilator for an electric locomotive. The ventilator comprises a dust proof and waterproof structure and a wind-increasing and pressurizing structure; the dust proof and waterproof structure consists of an impeller, and a dispersion cylinder inner cylinder and a connecting box which are fixed through a rear guide blade and a dispersing cylinder; the inlet of the impeller is provided with a flow guide cover; a main shaft of a motor is in pivot connection with the impeller; the dispersion cylinder inner cylinder is sleeved and fixed outside the motor; the lower end of the motor is fixed with the connecting box; a cable penetrates through the dispersing cylinder and is connected with the connecting box; the wind-increasing and pressurizing structure consists of an upper wind cylinder and the dispersing cylinder; and the upper wind cylinder is arranged outside the impeller and is fixedly connected with the dispersing cylinder. By the combination mode of two structures, the staining resisting capacity of equipment is improved, and the cleaning time and the maintenance period of a rotor are prolonged; and the working efficiency of the equipment is improved, the reliability of the equipment is improved, and noise is reduced.

Description

technical field [0001] The invention relates to a ventilator, in particular to a ventilator for an electric locomotive. Background technique [0002] The fans are mainly used to cool the traction converter and main transformer. The axial flow fans commonly used in railway electric locomotives are conventional axial flow fans with a rear guide vane structure. This fan has the characteristics of large flow rate and low static pressure. The domestic existing harmonious electric locomotives used in the western region are mainly used to transport coal. When introducing them, because foreign companies do not know enough about the environment of Chinese railways, many problems will arise in actual work. First of all, when the ventilator is working, it sucks air directly from the top of the locomotive without a filter device, so dust, grease, rainwater, snow, etc. may enter. Coal ash, dust, etc. are easily deposited on the blades of the fan, causing damage to the dynamic balance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/54F04D29/32F04D29/70
Inventor 李瑜李廷金王本义
Owner CRRC DALIAN INST CO LTD
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