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Screw compressor and its running method

A technology of screw compression and operation method, which is applied in the direction of rotary piston pump, rotary piston machine, pump combination for elastic fluid rotary piston type/oscillating piston type, etc., and can solve problems such as drop

Inactive Publication Date: 2007-03-21
HITACHI IND EQUIP SYST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the pressure loss of piping etc. decreases as the load factor decreases

Method used

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  • Screw compressor and its running method
  • Screw compressor and its running method
  • Screw compressor and its running method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Several embodiments of the present invention are described below according to the accompanying drawings. Figure 1 is a block diagram of one embodiment of a system equipped with a screw compression device of the present invention. This screw compression unit has 1 main screw compressor A 1 And multiple secondary screw compressors A 2 -A n . Auxiliary screw compressor A 2 ~A n There are sub-controllers B to control it respectively 2 ~Bn. Main screw compressor A 1 It is not equipped to control it while also controlling the sub-controller B 2 ~ Master Controller B of Bn 1 .

[0016] main controller B 1 with sub-controller B 2 There is a relay box B between ~Bn 0 . relay box B 0 Up to 9 sub-controllers can be connected. main controller B 1 with middle box B 0 Connected by wiring Sg1, relay box B 0 and each sub-controller B 2 -Bn by wiring Sg 2 -Sg n continue. main controller B 1 There is a timer T in 1 , sub-controller B 2 ~Bn is divided into a time...

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Abstract

A screw compressor system comprises a plurality of screw compressors the capacity of each of which is controlled by repeating load operation and no-load operation. Using a timer output corresponding to compressed gas consumption in a demander including gas consumption equipments, a parent controller determines the number of compressors to be operated among the plurality of compressors. Among the compressors determined to be operated, all compressors other than one are put in load operation. In accordance with a load factor of the excepted one screw compressor, the parent controller controls discharge pressure of each compressor. At this time, the control is made so that discharge pressure of the screw compressor system measured by a pressure gauge be lower than that upon the maximum gas consumption.

Description

technical field [0001] The present invention relates to a screw compressor capable of operating a plurality of screw compressors in parallel and its operating method, and more particularly to a screw compressor capable of capacity control based on the compressed gas consumption generated by the screw compressor and its operating method. Background technique [0002] In the compressed air manufacturing equipment equipped with multiple screw compressors, in order to minimize power consumption, the design of combining one compressor with variable speed operation and multiple compressors with constant speed has been described in Japanese Patent Laid-Open No. 2000- 161237 bulletin. In the compressed air manufacturing equipment described in this gazette, the rotational speed control of variable-speed compressors is given priority, and then a plurality of compressors with constant rotational speeds are operated or stopped by inversion control or rotational speed control. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C28/00F04C18/16F04B1/00F04B49/00F04C23/00F04C28/02F04C28/06
CPCF04C28/02F04C18/16F04C28/00F04C28/06
Inventor 金崎和也广濑新一沖田纯二鹤诚司
Owner HITACHI IND EQUIP SYST CO LTD