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Centrifugal fan device of large-discharge-capacity oilless air compressor of rail transit and mounting method thereof

An oil-free air compressor, rail transit technology, applied to the components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve the problems of large size and small air volume, and shorten the axial size. , The effect of increasing the air pressure and increasing the cooling air volume

Active Publication Date: 2016-06-15
SHIJIAZHUANG JIAXIANG PRECISION MASCH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a centrifugal fan device and installation method of a large-displacement oil-free air compressor for rail transit, so as to solve the existing problems in the centrifugal fan device and installation method of a large-displacement oil-free air compressor for rail transit. The size is too large and the air volume is small

Method used

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  • Centrifugal fan device of large-discharge-capacity oilless air compressor of rail transit and mounting method thereof
  • Centrifugal fan device of large-discharge-capacity oilless air compressor of rail transit and mounting method thereof
  • Centrifugal fan device of large-discharge-capacity oilless air compressor of rail transit and mounting method thereof

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Embodiment Construction

[0023] Such as Figure 1~Figure 4 As shown, a centrifugal fan device and installation method of a large-displacement oil-free air compressor for rail transit includes a volute 4 and an impeller 5 arranged inside the volute 4 . The impeller 5 is a multi-wing impeller, and its structure includes an annular front disc 5-1, an annular rear disc 5-2, and a plurality of blades 5 evenly arranged on the outer circumference between the front disc 5-1 and the rear disc 5-2. -3, the front disc 5-1 and the rear disc 5-2 are arranged coaxially, and the plurality of blades 5-3 form a ring structure coaxial with the front disc 5-1, and the outer peripheral edge of the vane 5-3 is in contact with the front disc 5 The outer peripheral edge of -1 is flush, and the diameter of the circle where the inner peripheral edge of the blade 5-3 is equal to or greater than the diameter of the circle where the inner peripheral edge of the front disc 5-1 is located. The blade 5-3 is set as a forward-curved...

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Abstract

The invention provides a centrifugal fan device of a large-discharge-capacity oilless air compressor of a rail transit and a mounting method thereof. The centrifugal fan device comprises a volute and an impeller arranged in the volute, wherein the impeller comprises a front annular disc, a rear annular disc and multiple blades uniformly arranged at the outer periphery between the front annular disc and the rear annular disc; the center hole of the rear annular disc is provided with a fan flange used for connecting the impeller with a motor shaft; a tensioning sleeve is arranged between the fan flange and the motor shaft; the included angle between a tangent line of an outside spur line of the blade and the tangent line in a peripheral direction is less than 13 degrees. The centrifugal fan device is capable of shortening the axial size of installation space needed for a cooling fan, realizing an integrated design of an air supply device in the rail transit, greatly enhancing the compact type of the air supply device, supplying sufficient cooling air amount to the oilless air compressor in the rail transit by use of a limited space and completely meeting the cooling requirement of the oilless air compressor.

Description

technical field [0001] The invention relates to a cooling device and an installation method for a large-displacement oil-free air compressor in rail transit, in particular to a centrifugal fan device and an installation method for a large-displacement oil-free air compressor in rail transit. Background technique [0002] Oil-free air compressors play a vital role in rail transportation. They usually provide a pneumatic system for rail vehicles, and operate the brakes of rail vehicles through the pneumatic system. The current air-cooled cooling system of oil-free air compressors includes two major components: a cooling fan device and a cooler, which cool lubricating oil and compressed air through heat exchange. Among them, the cooling fan of the oil-free air compressor generally adopts the axial flow fan, the air volume of the axial flow fan is relatively large, but its pressure head is low, and due to the limitation of its structure, it takes up a large volume when combined ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/44F04D29/62F04D29/66F04D29/02
CPCF04D29/023F04D29/263F04D29/281F04D29/441F04D29/626F04D29/666F05D2300/171
Inventor 郭亮
Owner SHIJIAZHUANG JIAXIANG PRECISION MASCH CO LTD
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