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Fluid machinery system and method for controlling same

A technology of fluid machinery and control methods, which is applied in the direction of liquid variable displacement machinery, pump control, fluid parameters, etc., can solve the problems of maintenance and stop, and achieve the effect of suppressing wear and deterioration and averaging the running time

Active Publication Date: 2021-02-12
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Industrial machinery such as gas compression equipment is essential for regular maintenance, but sometimes it is difficult to stop it for maintenance depending on the customer or purpose of use

Method used

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  • Fluid machinery system and method for controlling same
  • Fluid machinery system and method for controlling same
  • Fluid machinery system and method for controlling same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the operation number control device of a gas compression device for compressing air will be described as an example.

[0026] figure 1 It is a system configuration diagram of the operating number control device of the gas compression device of the present embodiment. figure 1 In the figure, it roughly includes compression devices 7A, 7B, an operation number control device 1 for controlling the operating state of the compression devices, and a tank 9 for storing compressed gas discharged from the compression devices. The above-mentioned operation number control device 1 includes: a pressure sensor 3 for measuring the pressure of the compressed gas stored in the above-mentioned container B; a control circuit 2 for determining the operation number of a plurality of compression devices and the operating compressors according to the pressure information; The operation switch 4 and the stop switch 5 determine the overall working state of the device.

[0...

Embodiment 2

[0037] In the control of compression equipment, when performing rotation and number control, when two compressors reach the specified operating time almost at the same time, if Figure 4 As shown, immediately after the stop of the compression device 7C, it may be operated again as a replacement of the compression device 7A, and a sufficient cooling period may not be ensured. At this time, since the operation / stop operation is performed many times in a short period of time, noise is generated. Therefore, in this embodiment, a function is newly added to the continuous operation time setting unit 20 of the compression device to extend the operation without performing the alternation immediately after the replacement machine stops even if the predetermined operation time is reached.

[0038] based on Figure 5 and Figure 6 The present Example 2 will be described. The continuous operation time setting unit 20 first judges in step 11 whether any one of the compression devices in...

Embodiment 3

[0046] In the prior art and the above-mentioned Embodiment 1 and Embodiment 2, the continuous operating time of the compression device is obtained by multiplying a preset coefficient, but when the total operating time is extremely different, there may be a difference in the total operating time. The averaging of the operating hours of the compression devices may not be completed before the maintenance time of the longest compression device is reached. Therefore, in Embodiment 3, the remaining time Tremain to maintenance can be calculated according to the total operating time of each compression device, the average remaining time Tremain_ave can be calculated, and the operating time of each compression device can be determined according to the ratio of the remaining time Tremain to the average remaining time, thereby enabling Control is performed so that the averaging of the total operating hours of the compression devices is completed before the compression device with the long...

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Abstract

Provided are: a device for controlling the number of units of fluid machinery, a device for controlling the number of units, with which it is possible to level out the operating time of fluid machinesconnected to the device for controlling the number of units; and a method for controlling the same. The fluid machine system comprises: a plurality of fluid machines; and a device for controlling thenumber of units, which can individually control the activation and stopping of fluid machines. The device for controlling the number of units sets, for each of the fluid machines, the continuous operating time on the basis of the total operating time of said fluid machine and other fluid machines, and if, from among the operating fluid machines, there is a fluid machine for which the continuous operating time set thereto has elapsed, and there is a fluid machine which is stopped, the machine that is stopped is started up and the fluid machine in question is stopped.

Description

technical field [0001] The present invention relates to a fluid machinery system, and in particular to a control method for controlling a plurality of fluid machinery operating number control devices. Background technique [0002] Industrial machines such as gas compressors are essential for regular maintenance, but sometimes it is difficult to stop them for maintenance depending on the customer or purpose of use. [0003] Therefore, there are Patent Document 1 and the like as a control method capable of simultaneously maintaining or replacing operating number control devices of a plurality of fluid machines in order to suppress the stop frequency of production facilities as much as possible. [0004] Patent Document 1 describes a method for controlling the number of pumps in operation, which controls the number of pumps to control the water level or flow rate, and is characterized in that the operation time of each pump is accumulated, and the operation sequence is determin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/06
CPCF04B2205/063F04B49/08F04B41/02F04B41/06F04B49/065F04B49/02F04B49/06F04B2207/043
Inventor 青柳则夫斋藤广明加藤史纪冈大地山本明弘
Owner HITACHI IND EQUIP SYST CO LTD
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