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Rotary compressor unit and method of controlling operation thereof

A compressor, rotary technology, applied in the direction of rotary piston machinery, pump control, rotary piston pump, etc., can solve the problems such as the impossibility of traditional drive system, and achieve the effect of improving durability

Inactive Publication Date: 2008-10-01
ANEST IWATA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve load balance between the compressors in the low-pressure section and the high-pressure section, it is necessary to increase the rotational speed of the compressor in the low-pressure section and decrease the rotational speed of the compressor in the high-pressure section, however, this is not possible with conventional drive systems for compressor units

Method used

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  • Rotary compressor unit and method of controlling operation thereof
  • Rotary compressor unit and method of controlling operation thereof
  • Rotary compressor unit and method of controlling operation thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] A first embodiment of the present invention will be described with reference to FIG. 1 . Figure 1 shows a schematic general structure of a rotary compressor unit with a low-pressure section compressor and a high-pressure section compressor, eg of tooth type. Referring to FIG. 1 , the rotary compressor unit includes a low-pressure section compressor (hereinafter referred to as LP compressor) 11, a high-pressure section compressor (hereinafter referred to as HP compressor) 12, and an LP compressor driven directly connected to LP compressor 11. An electric motor (hereinafter referred to as LP motor) 13 , and an HP compressor driving motor (hereinafter referred to as HP motor) 14 directly connected to the HP compressor 12 . Furthermore, an LP motor control inverter circuit (hereinafter referred to as LP inverter circuit) 15 for changing the rotational speed of the LP motor 13 by changing the frequency of the power supply to the LP motor 13 is provided, and an HP motor contr...

no. 2 example

[0052] Next, the second embodiment of the present invention will refer to figure 2 Be explained. exist figure 2 1, the same reference numerals are assigned to the same components as those in FIG. 1, and description thereof will be omitted. figure 2 The difference between the second embodiment in FIG. 1 and the first embodiment in FIG. 1 is that an intermediate pressure sensor 31 is provided in the discharge flow path 17 to detect the discharge pressure of the LP compressor 11 . Others are the same as the first embodiment in FIG. 1 . In addition to the pressure value detected by the pressure sensor 21, the pressure value detected by the intermediate pressure sensor 31 is input to the controller 22, and based on the detected two pressure values ​​via the LP and HP inverter circuits 15, 16, LP and HP The rotational speeds of the compressors 11, 12 are controlled.

[0053] With this structure of the second embodiment, not only the discharge pressure of the HP compressor 12 ...

no. 3 example

[0055] Next, the third embodiment of the present invention will refer to image 3 Be explained. exist image 3 in, with figure 2 The same components are marked with the same reference numerals, and their descriptions are omitted. image 3 The third embodiment in the figure 2 The difference of the second embodiment is that a single motor 41 is used to drive the compressor unit, a variable speed gear (hereinafter referred to as LP transmission) 43 is used to change the rotational speed of the LP compressor 11, and a variable speed gear (hereinafter referred to as LP transmission) 43 is provided. referred to as an HP transmission) 44 for changing the rotational speed of the HP compressor 12, and connects the gearbox 42 to the electric motor 41 so that the LP compressor 11 and the HP compressor 12 are driven via the LP transmission 43 and the HP transmission 44, respectively . other with figure 2 The same as in the second embodiment.

[0056] For the compressor unit of t...

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PUM

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Abstract

The compressor unit having at least two compressors, for example a low pressure stage compressor 11 and a high pressure stage compressor 12 connected in series, of which the low pressure sage compressor 11 and high pressure stage compressor 12 are driven by driving devices 13 and 14 respectively separately or driven by a single driving device 41 via variable speed gears 43 and 44 respectively connected to each of the compressors, and rotation speed of the low pressure stage compressor 11 and that of the high pressure stage compressor 12 are controlled independently in accordance with various operating conditions of the compressor unit so that optimal load balancing of the compressors 11 and 12 is always achieved.

Description

technical field [0001] The present invention relates to a rotary compressor unit comprising a low-pressure section compressor and a high-pressure section compressor connected in series and a method of controlling its operation, the unit being manufactured to operate with a proper load balance of each compressor, thereby realizing the effective operation. Background technique [0002] Typically, a toothed rotary compressor includes two rotors, a male rotor and a female rotor, each having claw-shaped teeth or blades. They turn in opposite directions without contacting each other as the rotor turns to compress the gas trapped in the compression chamber formed between the vanes and the inner surface of the compressor casing. Since the rotors do not contact each other and the inner surface of the compressor housing, the rotors are free from wear and have a long life. In addition, due to the non-contact fit of the rotor, no lubricating oil for the rotor is required, and a clean ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C28/02F04C28/24F04C28/00F04C29/00
CPCF04C28/08F04C18/123F04C23/001F04C28/02F04C2270/051F04C2270/0525F04C2270/18
Inventor 木村英幸
Owner ANEST IWATA CORP