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Oil circuit, oil-free compressor provided with such oil circuit and a method to control lubrication and/or cooling of such oil-free compressor via such oil circuit

A compressor and oil cooler technology, applied in the direction of engine lubrication, lubrication pump, machine/engine, etc., can solve problems such as starting the rotary oil pump, and achieve the effect of preventing leakage of the rotating shaft and small temperature difference

Active Publication Date: 2018-11-02
ATLAS COPCO AIRPOWER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0036] However, when the pump is started for the first time after a long time after its assembly, this initial quantity of oil has already evaporated partially or completely and is therefore no longer sufficient to start the rotary oil pump in a proper manner

Method used

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  • Oil circuit, oil-free compressor provided with such oil circuit and a method to control lubrication and/or cooling of such oil-free compressor via such oil circuit
  • Oil circuit, oil-free compressor provided with such oil circuit and a method to control lubrication and/or cooling of such oil-free compressor via such oil circuit
  • Oil circuit, oil-free compressor provided with such oil circuit and a method to control lubrication and/or cooling of such oil-free compressor via such oil circuit

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Effect test

Embodiment Construction

[0081] under these circumstances, figure 1 The illustrated oil-free compressor 1 is a screw compressor unit having a screw compressor element 2, a transmission 3 (or "gearbox") and an electric motor 4 with variable speed, wherein the oil-free compressor 1 is provided with a The oil circuit 5 of the present invention.

[0082] According to the invention, the oil-free compressor 1 does not have to be a screw compressor 1, since the compressor elements 2 can also be of different types, for example, tooth compressor elements, scroll compressor elements, vane compressor elements, etc. .

[0083] The compressor element 2 is provided with a housing 6 having an inlet 7 for suction gas and an outlet 8 for compressed gas. Two matching helical rotors 9 are mounted on bearings in housing 6 .

[0084] The oil circuit 5 will supply the oil-free compressor 1 with oil 11 to lubricate the components of the oil-free compressor 1 and cool them if necessary.

[0085] These components are, for...

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Abstract

The invention relates to an oil circuit for lubrication and cooling of an oil-free compressor comprising a motor with a variable speed and a compressor element driven by said motor, - whereby this oilcircuit is provided with an oil reservoir with oil and a rotary oil pump configured to drive oil from the oil reservoir through an inlet channel upstream the rotary oil pump to the compressor elementand / or the motor via an oil pipe; - whereby this rotary oil pump is provided with a rotor and a swept volume, and whereby this rotary oil pump is driven by the motor of the compressor element; - whereby the oil circuit is further provided with a return pipe, a bypass pipe and a bypass valve and an oil cooler, characterized in that the oil cooler is placed in the bypass pipe and that the bypass valve is placed in the oil pipe. Through the technical solution, oil is not cooled in a low speed and the oil is not heated to an overhigh temperature in a high speed. Furthermore a smaller oil cooler can be selected in the bypass pipe. Furthermore, in restarting the oil-free compressor, the rotary oil pump is fully lubricated by oil and high suction capability is realized.

Description

technical field [0001] The invention relates to an oil passage, an oil-free compressor provided with the oil passage and a method for controlling the lubrication and / or cooling of the oil-free compressor through the oil passage. [0002] More specifically, the present invention aims to provide an improved oil circuit and an improved method of controlling the lubrication and / or cooling of an oil-free compressor comprising a Electric motors with variable speed or speed (ie, with variable speed drive (VSD) control). Background technique [0003] Oil circuits are known to lubricate and cool components in such electric motors. [0004] These components are such as, but not limited to, bearings and gears of electric motors. [0005] At high motor speeds, these bearings and gears require precise amounts of oil lubrication: neither too much oil, which can cause hydraulic loss and even overheating, nor too little oil, which can cause excessive friction and overheating. [0006] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/02F04C29/04F04C23/02F16N13/20
CPCF04C23/02F04C29/021F04C29/025F04C29/042F04C29/045F16N13/20F04C28/06F04C28/08F04C28/28F04C29/0014F04C2/102F04C2240/81F04C18/16F04C2240/809F04C29/04F04C29/028
Inventor W·缪森T·德邦特里德尔E·罗斯克姆
Owner ATLAS COPCO AIRPOWER NV
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