JPH09303287A - Gas compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent effect including the reduction of facility cost, the improvement of reliability and the reduction of a facility area, compared with a system for utilizing an external inter-cooler, by installing a gas cooling device inside at least one of a easing and a stationary blade so as to cool gases at a pressure rise process. SOLUTION: A coolant having pressure boosted with a pump 11 flows in the part of a casing 1A between the first-stage and the second-stage moving blades 13a and 13b, and a coolant passage 6a formed inside a stationary blade 3a via a pipeline 12. Also, the coolant after the coolant passage 6a first flows in an upper pipe passage 14a laid outside the easing 1A and then flows to the next coolant passage 6b. Furthermore, the coolant after the passage 6b flows in an upper pipeline 14b similarly formed outside the casing 1A and then flows in the next coolant passage 6c, thereby being discharged from an upper pipeline 12a. As a result, gases having pressure raised with the moving blades 13a to 13d are effectively cooled with the coolant flowing in the coolant passages 6a to 6c formed within the easing 1A and the stationary blades 3a to 3d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas compressor capable of reducing required power.

[0002]

2. Description of the Related Art The required power of a gas compressor largely depends on the inlet gas temperature. Therefore, in the conventional multi-stage gas compressor, as shown in FIG. 4, the gas compressor is composed of a low-pressure compressor 01a and a high-pressure compressor 01b, and an intercooler 011 for cooling the gas pressurized between the two. Some facilities that have both have been put to practical use. Reference numeral 02 in FIG. 4 denotes a motor for driving the compressor, and a white arrow indicates a flow of the gas to be pressurized.

However, in terms of cost, reliability and space, this type of axial flow gas compressor is hardly adopted.

[0004]

The above-mentioned conventional technique shown in FIG. 4 has an advantage that the required power is reduced by the intercooling, but the following disadvantages greatly exceed the advantages. That is, the gas compressor is divided before and after the intercooler, and the problems such as an increase in equipment cost due to an increase in the number of parts, a decrease in reliability, and an increase in installation area greatly exceed the advantages.

The present invention is intended to provide a gas compressor capable of solving the above problems.

[0006]

The gas compressor of the present invention comprises:
It is characterized in that a gas cooling device for cooling the gas in the middle of pressurization is provided inside at least one of the passenger compartment and the vanes.

Since the present invention has the above structure,
The gas in the middle of pressurization is cooled without being extracted to the outside of the gas compressor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The motor 1 uses the motor 2 to move the moving blades 13a, 13b, 13c, 13d of the first to fourth stages.
Is a four-stage axial flow gas compressor driven by a stationary vane 3a, 3
b, 3c and 3d are fixed.

Reference numeral 10 is a liquid refrigerant reservoir provided outside the axial flow gas compressor 1, and a pump 11 is provided in the refrigerant reservoir 10.
Is connected. Each stationary vane 3a, 3b, 3c and the passenger compartment 1
Refrigerant passages 6a, 6b, and 6c are provided inside the portion of A where each vane is attached. The refrigerant whose pressure is increased by the pump 11 passes through the pipe 12 and flows through the portion of the casing 1A between the first and second moving blades 13a and 13b and the inside of the refrigerant passage 6a provided inside the stationary blade 3a. The refrigerant that has flowed out of the refrigerant passage 6a flows into the next refrigerant passage 6b through the upper pipeline 14a that has been once discharged to the outside of the vehicle compartment 1A, and the refrigerant that has exited the refrigerant passage 6b is above. Similarly, it is designed to be discharged to the upper pipeline 12a flowing through the next refrigerant passage 6c through the upper pipeline 14b discharged to the outside of the vehicle interior 1A.

In FIG. 1, 1a is a low-pressure gas inlet 1b of the gas to be boosted in the gas compressor 1 and 1b is a high-pressure gas outlet of the gas to be boosted in the gas compressor 1, and the white arrow indicates the flow of the gas to be boosted. Is shown.

In this embodiment, the moving blades 13a, 13b,
The gas which is being pressurized by 13c and 13d is cooled by the refrigerant flowing in the refrigerant passages 6a, 6b and 6c provided inside the casing 1A and the vanes 3a, 3b, 3c and 3d, and the outside gas is cooled. It is possible to reduce the required power of the gas compressor 1 by cooling the gas in the middle of pressurization without providing an intercooler every other time and therefore without extracting the gas to be boosted out of the gas compressor 1.

As the liquid refrigerant, low temperature boiler feed water, deaerator feed water or the like can be used. Also,
Instead of the liquid refrigerant, a gas refrigerant, for example, a low temperature boosted gas, a low temperature hydrogen gas, or the like can be used.

A second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment of the present invention in that a large number of shrouds 4a, 4b, 4c of the respective vanes 3a, 3b, 3c and a large number of inner surfaces of a portion between the adjacent vanes of the vehicle interior 1A are provided. A heat absorbing fin 5 is provided. Further, a continuous refrigerant passage 6 is provided inside the casing 1A and the stationary vanes 3a, 3b, 3c, and each refrigerant passage 6 is shown in FIG.
As shown in Fig. 3, it is configured by a cooling pipe, or Fig. 3 (b).
As shown in (1), the inner wall of the vehicle interior 1A is configured to be one wall of the refrigerant passage 6.

Also in this embodiment, as in the first embodiment of the present invention, the gas in the middle of pressurization can be cooled to reduce the required power of the gas compressor. It is possible to more effectively cool the gas during pressurization.

The first and second embodiments of the present invention described above relate to a multi-stage axial compressor, but the present invention can be widely applied to multi-stage gas compressors.

[0016]

As described above, according to the present invention, since the cooling device for cooling the gas in the middle of pressurization is provided inside at least one of the passenger compartment and the stationary blades of the gas compressor, it is kept outside. Compared with the method that uses the intercooler, the effects of reduced equipment costs, improved reliability, and reduced installation area can be obtained.
An economical gas compressor can be provided.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a second embodiment of the present invention.

3 (a) and 3 (b) are A- of FIG. 2 showing a refrigerant passage used in the second embodiment of the present invention.
FIG.

FIG. 4 is a conceptual diagram of a conventional gas compressor.

[Explanation of symbols]

 1 Axial Flow Gas Compressor 1a Low Pressure Gas Inlet 1b High Pressure Gas Outlet 1A Cabin 2 Motors 3a, 3b, 3c, 3d Stator Blades 4a, 4b, 4c Shroud 5 Fins 6, 6a, 6b, 6c Refrigerant Passage 10 Refrigerant Reservoir 11 Pump 12, 12a pipelines 13a, 13b, 13c, 13d moving blades 14a, 14b pipelines

Claims (1)

[Claims] 1. A gas compressor, characterized in that a gas cooling device for cooling gas in the middle of pressurization is provided inside at least one of a vehicle compartment and a vane.