JPS58183880A - Cooling liquid injection type isothermal compression system compressor - Google Patents

Abstract

PURPOSE:To permit to achieve compression and cooling of air at one time by means of water injection by a method wherein the cooling liquid, pressurized by a reciprocating type liquid pump consisting of the main body of a compression chamber and the main body of the compressor equipped with the reciprocating type liquid pump, is injected into the compression chamber. CONSTITUTION:The cooling water is pressurized by a reciprocating type water pump 13, discharging the water with a cycle same as a compression cycle, and the compression heat thereof is removed by a heat exchanger 16 for cooling, thereafter, is injected uniformly to the whole sectional area of the compression chamber 2 of the main body 1 from injection valves 4, 5, 6 through a cooling water jacket 3 serving as a cooling water path in order to compress the air under cooling it. Accordingly, the pressurized water may achieve two effects of compression and cooling of the air at one time. In the compression process, the water is poured into the compression chamber 2 and the air is compressed by the elevation of the level of the water, therefore, the parts of the compressor, which can be suffered from mechanical friction, may be eliminated.

Description

[Detailed Description of the Invention] Since compressors have energy, it has become necessary to approach isothermal compression with less compression power. The present invention effectively achieves this. Taking an air compressor as an example, the present invention uses a reciprocating water pump that discharges water into a compression chamber that compresses air in the same cycle as the compression cycle. This method compresses the air while cooling it by injecting and ejecting it, and the pressurized water achieves two functions at once: compressing and cooling the air. With this structure, cooling is carried out between minute water droplets and air, and there is no thermal resistance due to direct heat transfer without passing through a heat transfer surface. Sufficient cooling is provided. The compression process also involves simply injecting pressurized water into the compression chamber, which is a closed space. Water is injected into the compression chamber and compressed as the water level rises, so there are no mechanical friction parts, and the compression chamber itself does not require the high-grade mechanical finish of a normal compressor. It just needs to have resistance to water. In addition, in a normal compressor, a gap inevitably remains between the piston and the cylinder (this is usually called the rear balance volume), which deteriorates the volumetric efficiency, whereas in the present invention, a gap corresponding to the piston remains. Since it is a liquid and conforms to the shape of the cylinder and fills it without any gaps, no clearance volume is generated. However, even water absorbs a small amount of air, which increases as the air pressure increases, and has the effect of being released again when the pressure is reduced, which acts as a clearance volume.
The impact is small. In addition, the moisture contained in the air is
As it condenses and becomes drain due to compression, the amount of cooling water gradually increases and overflows into the discharged air. Therefore, there is no need to replenish cooling water. The discharge amount per cycle of the reciprocating water pump should be equal to the volume of the compression chamber.Next, this will be explained with reference to the drawings.In Fig. 1, this is a longitudinal sectional view of the overall structure of the present invention. However, 1 is a compression chamber main body, 2 is a compression chamber, and 3 is a cooling water jacket that also serves as a cooling water passage. This removes some of the compression heat, but the amount is small and the temperature rise of the cooling water is also small. 4.5.6 is an injection valve for cooling water that flows in through the cooling water jacket 3, and a large number of them are installed at the top of the compression chamber 2 to inject uniformly over the entire cross section of the compression chamber 2. Cooling shall be measured. 7 is a suction valve similar to a normal compressor. However, in this case, since it will come into contact with water, it will be sewn to prevent corrosion. 8 is also a leaf/i3 valve similar to a normal compressor, and since it also comes into contact with water, care must be taken to ensure corrosion resistance. 9 is a suction pipe, and 10 is a discharge pipe. 11 is a pump suction valve that sucks cooling water from the compression chamber 2 into the reciprocating water pump, and 12 is a pump discharge valve that discharges the cooling water from the compression chamber 2. The water leaving this valve passes through the cooling water jacket 3 and is injected from the injection valve 4.5.6. 13 is a reciprocating water pump main body, and 614 is a reciprocating water pump piston. Reference numeral 15 is a rubber bellows (for example, something like the product name Bellofram), which was used because it has less mechanical loss due to friction and does not leak compared to ordinary gland packing, etc. Depending on the situation, it is also possible to use other types of patchkins. Reference numeral 16 denotes a cooling heat exchanger, which uses external cooling water to remove the compression heat absorbed by the cooling water. 17 is the piston rod,
18 is a crosshead, 19 is a crosshead guide, 20
2 is a connecting rod, and 21 is a compressor body. 22 indicates the bottom dead center position of the reciprocating water pump piston 14.

Although this drawing shows the case of a single cylinder, it is of course possible to use a double cylinder. Furthermore, the pressure ratio that can be increased in one stage is several atmospheres with a normal compressor, but due to isothermal compression, it is possible to increase the pressure to several tens of atmospheres in a single stage. Of course, separating the high-pressure stage and the low-pressure stage to achieve multi-stage compression can also be applied more advantageously in the case of large machines.

Although the above explanation was for air, it is obvious that the present invention can also be used for gases other than air, and oil and various other liquids can be used as the coolant, and materials suitable for this can be used. The only difference is that

[Brief explanation of the drawing]

FIG. 1 is a small longitudinal sectional view of the overall structure of the present invention.

Claims (1)

[Claims] A coolant injection type isothermal compression compressor that cools and compresses the internal gas by injecting pressurized coolant into the compression chamber using a reciprocating liquid pump.