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Method for preventing condensate in the oil of oil-injected compressor and compressor in which such method is applied

A technology of compressor and compressed gas, applied in the direction of machine/engine, engine lubrication, liquid variable capacity machinery, etc., can solve the problems of water vapor condensation, damage, entering oil, etc.

Active Publication Date: 2015-07-15
ATLAS COPCO AIRPOWER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The disadvantage of this type of compressor is that water vapor present in the compressed gas condenses and Risk of getting into oil, which could cause damage to compressor elements when restarting

Method used

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  • Method for preventing condensate in the oil of oil-injected compressor and compressor in which such method is applied
  • Method for preventing condensate in the oil of oil-injected compressor and compressor in which such method is applied
  • Method for preventing condensate in the oil of oil-injected compressor and compressor in which such method is applied

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Embodiment Construction

[0033] figure 1 The device shown is an oil-injected screw compressor 1 according to the invention, comprising a known screw-type compressor element 2 with a casing 3 , in which two meshing screw rotors 4 are driven by a drive 5 .

[0034] The compressor element 2 is provided with an inlet 6 which can be closed by a controllable inlet valve 7 and which is connected by means of a suction pipe 8 to an inlet filter 9 for sucking gas, in this case air, from the environment.

[0035] The compressor element 2 is also provided with an outlet 10 and a pressure pipe 11 connected thereto, which is connected to the downstream consumption network 16 via the pressure vessel 12 of the oil separator 13 and via the pressure pipe 14 and the cooler 15, so as to supply various A pneumatic tool or the like (not shown here) is supplied.

[0036] At the output of the pressure vessel 12, a minimum pressure valve 17 is attached to the pressure pipe 14, said minimum pressure valve 17 opening only when...

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Abstract

Method for preventing condensate in the oil of an oil-injected compressor (1), characterised in that before the compressor element (2) is stopped, when the maximum pressure (pmax) in the consumer network (16) has been reached, the compressor element continues to be driven until the temperature (T) of the oil or the compressed gas is lower than a set fixed or calculated minimum value (Tmin) above which there is no or as little condensate as possible in the oil.

Description

technical field [0001] The invention relates to a method for preventing condensation in the oil of an oil-injected compressor. [0002] More particularly, the invention is intended for oil-injected compressors with variable speed. Background technique [0003] This type of compressor includes a compressor element, such as a screw compressor element, with two intermeshing rotor screws mounted on bearings in a housing and driven by a drive with a speed that varies with load . [0004] This type of compressor is also provided with oil passages arranged to spray oil to the compressor elements for lubricating and cooling the rotor screws and for sealing the gaps between the rotors themselves and between the rotor and the casing. [0005] The injected oil leaves the compressor element and the oil droplets in the compressed gas are driven through an oil separator to separate and receive the oil and spray the oil back into the compressor element (optionally after cooling) before b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/02F04C29/04
CPCF04C28/06F04C29/026F04C2270/19F04B19/12F04B39/02F04B49/065F04B49/24F04B2201/0402F16N29/02F04C18/16F04C27/02F04C29/0014F04C29/021
Inventor A·J·F·德西龙A·德沃希特J·科克尔伯格斯
Owner ATLAS COPCO AIRPOWER NV