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Water-cooled oil-free air compressor

An air compressor and compressor technology, applied in the direction of liquid variable displacement machinery, rotary piston machinery, mechanical equipment, etc., can solve problems such as unsuitable for miniaturization and restrictions on cooler configuration, and improve productivity and maintainability Effect

Active Publication Date: 2010-12-01
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the intercooler and the aftercooler are arranged opposite to each other, the configuration of the two coolers is limited
Therefore, when increasing the size of the cooler unit in response to higher output (larger air volume) of the air compressor, it may not be suitable for downsizing of the compressor as a whole due to restrictions on the configuration of the integrated cooler.
[0013] Patent Document 4 seeks to reduce the size of the cooler itself, but the trend of increasing the size of the cooler with the increase in compressor output (larger air volume) has not changed, and it is desired to solve this problem

Method used

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Examples

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Embodiment 1

[0055] Referring to the accompanying drawings, the embodiments of the present invention will be further described in detail. In addition, below, the screw compressor which compresses air by the rotation of male and female rotors is demonstrated as an example.

[0056] figure 1 It is a system diagram of a water-cooled two-stage oil-free screw compressor 30 having a low-pressure stage compressor main body 1 and a high-pressure stage compressor main body 2 . Each of the low-pressure stage compressor main body 1 and the high-pressure stage compressor main body 2 includes a pair of male rotors and female rotors. That is, the compressor of the present embodiment is a screw-type air compressor that compresses air by rotating the pair of male and female rotors.

[0057] A pinion gear 21 is fitted to the shaft end portion of each male rotor having the low-pressure stage compressor main body 1 and the high-pressure stage compressor main body 2 . These pinion gears 21 mesh with a larg...

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Abstract

A water-cooled oil-free air compressor which features compactness and ensures improved productivity and maintainability. The compressor is an oil-free screw compressor which includes a low pressure stage compressor body, an intercooler for water-cooling the compressed air discharged from the low pressure stage compressor body, a high pressure stage compressor body for further compressing the compressed air cooled by the intercooler, and an aftercooler for water-cooling the air discharged from the high pressure stage compressor body. The intercooler and aftercooler each have a plurality of units, all of which are almost equal in shape. A cooler header on each or either of the inlet and outlet sides for compressed air is shared by the units of each cooler.

Description

technical field [0001] The present invention relates to a water-cooled oil-free air compressor, and is particularly suitable for an air compressor provided with a cooling device for cooling multi-stage compressed compressed air. Background technique [0002] Most of the current two-stage oil-free screw compressors having a low-pressure stage compressor main body and a high-pressure stage compressor main body have an intercooler (inter cooler) for cooling the compressed air compressed by the low-pressure stage compressor main body, and an intercooler for An after cooler (after cooler) that cools the compressed air compressed by the main body of the high-pressure stage compressor. [0003] As the configuration of a water-cooled two-stage compressor having an intercooler and an aftercooler, the configurations of Patent Document 1 and Patent Document 2 are known. The structure is such that, in Patent Document 1, the cooling water is supplied in the order of the aftercooler and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/06
CPCF04C2240/70F04B39/064F04C29/04F04C28/02F04C23/001F04C18/16F01C21/007
Inventor 伊藤雄二铃木智夫太田广志
Owner HITACHI IND EQUIP SYST CO LTD
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