Screw compressor

A screw compressor and rotor technology, applied in mechanical equipment, engine components, engine functions, etc., can solve the problem of high-speed application of screw compressors that cannot be applied, and achieve the effect of reducing axial and torsional vibrations

Active Publication Date: 2020-03-06
ATLAS COPCO AIRPOWER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this gear will be able to accommodate vibrations, it is too weak to be used in high speed applications such as screw compressors

Method used

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  • Screw compressor
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Examples

Experimental program
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Effect test

Embodiment Construction

[0031] figure 1 A screw compressor 1 according to the invention is schematically shown, which is provided with a compressor element 2 .

[0032] The compressor element 2 comprises a housing 3 in which two rotors 4 , 5 are mounted with bearings in their shafts 6 , 7 . These rotors 4 , 5 are so-called screw rotors, ie a male screw rotor 4 and a female screw rotor 5 , which have lobes 8 which can rotate into each other in cooperation.

[0033] For example, the male screw rotor 4 has five lobes 8 and the female screw rotor 5 has three lobes 8 .

[0034] Of course, it is possible for the rotors 4, 5 to have a different number of lobes 8, or for the screw compressor 1 to have more than one such compressor element.

[0035] At one end 7 a of the shaft 7 of one rotor 5 there is provided a first drive gear 9 which can mesh with a second drive gear 10 mounted on a shaft 11 of an electric motor 12 . In this case, the first drive gear 9 is mounted on the female screw rotor 5 , but it m...

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PUM

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Abstract

Screw compressor comprising a first rotor (4) and a second rotor (5), each rotor (4, 5) provided with a synchronisation gear (13, 14), said screw compressor (1) further provided with an electric motor(12) and one or two driving gears (9, 10) for driving said first rotor (4) or second rotor (5), characterised in that at least one of the synchronisation gears (13, 14) or driving gears (9, 10) is provided with spokes (17) between a rim (16) supporting a gear mesh (15) and a corresponding gear hub (18).

Description

technical field [0001] The present invention relates to screw compressors. Background technique [0002] It is known that in oil-free screw compressor elements, the two rotors are driven at high speeds to minimize leakage and maximize compressed air output. The first rotor (male or female) is driven and in turn the second rotor is driven via two so-called synchronous gears. [0003] Most commonly, the first rotor is driven via a gearbox. When using a conventional induction motor, at 1500 rpm, a gearbox with a large transmission ratio is necessary to achieve the high speeds required to drive the oil-free screw compressor elements. Gearboxes with large gear ratios are large, expensive and generate large energy losses. [0004] So-called direct drives can also be used, where the motor directly drives the oil-free screw compressor elements. In that case, expensive motor control systems are required and the losses associated with the high frequency switching required to contr...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F16H55/14F04C18/08F04C18/16
CPCF04C18/16F16H55/14F01C17/02F04C29/005F04C18/084F04C2220/12F04C23/02F04C29/0085F05B2260/4031F04C18/08F04C29/0042F04C2240/40
InventorW·缪森B·费雷斯特
OwnerATLAS COPCO AIRPOWER NV