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Liquid-cooled compressor and operation method therefor

A method of operation and compressor technology, applied to liquid variable displacement machinery, mechanical equipment, variable displacement pump components, etc.

Active Publication Date: 2018-08-03
神钢压缩机株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to reliably prevent the pressure in the gas compression space from becoming an undesired negative pressure when the suction regulating valve is closed in a liquid-cooled compressor, and to prevent noise when the suction regulating valve is opened.

Method used

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  • Liquid-cooled compressor and operation method therefor
  • Liquid-cooled compressor and operation method therefor
  • Liquid-cooled compressor and operation method therefor

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no. 1 Embodiment approach ）

[0029] while referring to Figure 1 to Figure 5 The compressor 1 and its operating method according to the first embodiment of the present invention will be described. First, while referring to figure 1 A schematic configuration of the compressor 1 will be described.

[0030] The compressor 1 includes a compressor main body 11 , an oil separator 13 , an intake air regulating valve 20 , a pressure maintaining unit 15 , and an on-off valve 16 . The compressor main body 11 compresses gas to be compressed, that is, gas to be compressed (for example, air) by means of a pair of male and female screw rotors meshing with each other. A pair of male and female screw rotors meshing with each other in the compressor 1 are accommodated in a gas compression space (rotor chamber) 19 formed in a rotor housing.

[0031]The compressor main body 11 is disposed between the suction flow path 10 and the discharge flow path 12 . The suction flow path 10 is connected to the suction port 19A provi...

no. 2 Embodiment approach ）

[0051] Figure 8 A schematic configuration of the compressor 1 according to the second embodiment of the present invention is shown. figure 1 The same parts of the compressor 1 according to the illustrated first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0052] In the compressor 1 of the second embodiment, the return flow path 35 is further branched from the valve control flow path 31 branched from the discharge flow path 12 . A valve control flow path 31 for controlling the opening and closing of the suction regulating valve 20 is branched into the discharge flow path 12 on the downstream side of the liquid separation recovery device (oil separation recovery device) 13 . The valve control flow path 31 branches into a return flow path 35 at a return branch point 44 located on the downstream side thereof. The return flow path 35 is branched at a release branch point 47 into an atmosphere release flow path 36 that communic...

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Abstract

A liquid-cooled compressor is equipped with: a compressor main body 11 arranged between an intake flow path 10 and a discharge flow path 12; an intake adjustment valve 20 provided in the intake flow path 10; a return flow path 35 that branches from the discharge flow path 12, and is connected to the intake flow path 10 located between the intake adjustment valve 20 and the compressor main body 11;an opening / closing valve 16 provided in the return flow path 35; an atmosphere release flow path 36 that branches from the return flow path 35 downstream from the opening / closing valve 16; and a constricting unit 17 provided in the atmosphere release flow path 36. The main-body-side intake pressure P1 on the main-body-intake side of the intake flow path 10 when the intake adjustment valve 20 is closed exceeds a lower limit negative pressure PB which prevents explosive noise from the intake adjustment valve 20. Thus, in this liquid-cooled compressor 1 it is possible to reliably prevent pressure in a gas compression space when the intake adjustment valve 20 is closed from reaching an undesirable negative pressure, and it is possible to protect the compressor main body 11.

Description

technical field [0001] The invention relates to a liquid-cooled compressor and its operating method. Background technique [0002] In a liquid-cooled compressor having a suction regulating valve on the suction side of the compressor main body and an atmospheric release flow path on the discharge side, the discharge capacity is adjusted by switching between no-load operation and load operation. If the pressure on the discharge side becomes high, close the suction regulating valve and shift to no-load operation to release the atmosphere release flow path. If the pressure on the discharge side becomes low, open the suction regulating valve and shift to closing the atmosphere release flow path load operation. [0003] When no-load operation is performed, the pressure in the rotor chamber of the compressor main body gradually approaches a vacuum state, causing various damages to the compressor main body. To prevent this, various countermeasures have been studied. Patent Docume...

Claims

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Application Information

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IPC IPC(8): F04B39/10F04B49/03F04C28/06
CPCF04B39/10F04B49/03F04C28/06
Inventor 坂口广宣星川明小村一雄
Owner 神钢压缩机株式会社
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