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Improved low-pressure screw compressor

A screw compressor, low pressure technology, used in rotary piston machinery, mechanical equipment, engine components, etc.

Active Publication Date: 2010-11-03
ATLAS COPCO AIRPOWER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Such known high-pressure screw compressors have the disadvantage that they are relatively expensive due to the described bearing construction and due to the relatively large number of Bearings and their alignment, their assembly is very time-consuming
[0007] Another disadvantage of the known screw compressor is that the bearing arrangement is extremely overdesigned for low pressure applications
[0009] Since the known Roots blower only has a limited rotational speed of an average of 3,000 rpm to a maximum of 5,000 rpm, and the bearings are not subjected to axial forces, Therefore, this kind of bearing structure is feasible, but for low-pressure screw compressors that usually work at a speed of 6,000 revolutions per minute or more, due to the technical constraints caused by the bearing manufacturer, the above-mentioned standard double-row angle The use of surface contact ball bearings is excluded

Method used

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Embodiment Construction

[0026] figure 1 with 2 Shown is an improved low-pressure screw compressor 1 according to the invention, equipped with a rotor housing 2 with an inlet side and an outlet side, and in which two rotor bodies, respectively a driving rotor body 3 and a driven rotor body 4, are arranged. meshing rotor bodies 3 and 4.

[0027] The drive rotor body 3 is configured in a known manner in the shape of a shaft 5 around which a male thread 6 extends, while the driven rotor body 4 is also formed in a known manner as a shaft 7 around which a male Thread 6 engages female thread 8 .

[0028] The rotor bodies 3 and 4 are rotatable in the rotor housing 2 when their respective shafts 5 and 7 are respectively bearing-fitted on both sides inside the rotor housing 2 .

[0029] According to the invention, the aforementioned rotor bodies 3 and 4 are bearing-fitted on the inlet side of the rotor housing 2 by means of a single loose bearing 9 preferably but not necessarily made as a single row and gr...

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Abstract

Improved low-pressure screw compressor provided with a rotor housing (2) with an inlet side and an outlet side, whereby in this rotor housing (2) are provided two rotor bodies (3 and 4) which each consist of a shaft (5, 7 respectively) and a screw (6, 8 respectively) which is provided round the above-mentioned shaft (5 or 7), whereby the rotor bodies (3 and 4) are bearing-mounted in said rotor housing (2) with their shafts (5 or 7), and whereby each of the rotor bodies (3 and 4) is bearing-mounted on the inlet side of the rotor housing (2) with a single loose bearing and on the outlet side ofthe rotor housing by means of a single fixed cylindrical roller bearing (15).

Description

technical field [0001] The present invention relates to an improved low pressure screw compressor or so called screw blower. [0002] In particular, the present invention relates to an improved low-pressure screw compressor having a rotor housing in which are arranged two intermeshing rotor bodies, wherein each rotor body consists of a shaft and a shaft arranged around said shaft. The thread is formed so that the rotor body is rotatably provided in the rotor case when the respective shafts of the rotor body are fitted by bearings on both sides inside the rotor case. Background technique [0003] Low-pressure screw compressors or so-called "screw blowers" are compressors which are used in particular to supply large flows of compressed gas at relatively low pressures, in other words at pressures relative to ambient pressure, usually at most 1 bar to 3 bar. [0004] High-pressure screw compressors are already known, whereby for example the aforementioned rotor bodies are beari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/16F01C21/02
CPCF04C18/16F01C21/02F04C18/126F04C2240/52
Inventor G·A·范洛伊文
Owner ATLAS COPCO AIRPOWER NV
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