JP2009068478A - Emulsification prevention method for oil circulation air-cooled intermediate-pressure compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of preventing (reducing) emulsification for an oil circulation air-cooled intermediate pressure (1.37 MPa) compressor. <P>SOLUTION: The operation of a fan 1 for air-cooling an oil cooler 13 and an outer cooler 14 is controlled by the temperatures of a compressed air and an oil in the entire system passage of the intermediate pressure compressor. Also, the control is performed by detecting the oil temperature and the compressed air pressure. Consequently, the emulsification in the system passage is prevented from occurring (reduced). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for preventing emulsification in an oil-circulating air-cooled intermediate-pressure compressor that performs stable and efficient operation by preventing or reducing emulsification of oil in a medium-pressure compressor having a compressed air pressure of 1.37 MPa. About.

Generally used compressors have a compressed air pressure of about 0.7 to 0.93 MPa, but need a medium pressure, compressed air of about 1.37 MPa at the request of the user. A corresponding medium pressure compressor is required. In this case, since the compression of air and oil is higher than that of a normal compressor, an emulsification phenomenon is likely to occur. For this reason, it is necessary to take some anti-emulsification measures.
In addition, there are various known techniques for ordinary oil-cooled compressors, and “Patent Document 1” is an example.
JP2004-11427 (FIG. 1)

  As the entire structure of the “oil-cooled compressor” of “Japanese Patent Application Laid-Open No. 2004-11427” of “Patent Document 1,” the discharge temperature of the discharge gas from the compressor body (12) is set as shown in FIG. It is characterized by holding properly, and is not characterized by emulsification prevention as in the present invention described later. In addition, there are hardly any other known techniques characterized by emulsification prevention.

  The present invention was invented in view of the above circumstances, and various means for preventing emulsification in a medium-pressure compressor are provided in the system path to prevent or reduce oil emulsification, and is stable and efficient. An object of the present invention is to provide a method for preventing emulsification in an oil circulating air-cooled intermediate pressure compressor that supplies a normal operation and compressed air of normal intermediate pressure to the use side.

  In order to achieve the above object, according to the present invention, air from an air cleaner is mixed with oil by an air capacity adjustment valve and introduced into a compressor body of medium pressure (about 1.37 MPa). The compressed air and oil formed in this way are introduced into the receiver tank, and the oil and gas are separated. The separated air is sent to the use side through the oil cooler, outer cooler and dryer, and the separated oil is introduced again into the compressor body. A method of preventing emulsification in an oil-circulating air-cooled intermediate pressure compressor that circulates and detects ON / OFF control of the air cooler and the air cooler of the outer cooler by detecting the oil temperature of the compressed air / oil. And controlling the amount of circulating oil and detecting the air pressure by adjusting the oil temperature of the separated oil to control the air pressure of the compressed air.

  Further, the invention according to claim 2 is that the air cooling fan ON / OFF control is turned on when the oil temperature of the compressed air / oil is 98 ° C. or more and turned off when it becomes 92 ° C. or less. Features.

  According to the emulsification prevention method of the oil circulation type air-cooled intermediate pressure compressor of claim 1 of the present invention, the temperature of the compressed air / oil is detected and the air cooling fan of the oil cooler or the outer cooler is controlled to be turned ON / OFF. The generation of water in the air or oil can be controlled, and as a result, emulsification can be prevented. Moreover, emulsification can be reduced by adjusting the amount of oil introduced to the compressor side by detecting the oil temperature, or by releasing the compressed air by the compressed air pressure.

  According to the method for preventing emulsification in the oil circulation type air-cooled intermediate pressure compressor according to claim 2 of the present invention, the medium pressure compressor is emulsified even if the oil cooler or the outer cooler is air-cooled when the oil temperature is 98 ° C. or higher. There is evidence that emulsification is likely to occur when air cooling with an air cooling fan is performed at a temperature of 92 ° C. or lower, and specific ON / OFF control conditions can be established to further ensure emulsification prevention. .

Embodiments of an emulsification prevention method in an oil circulation type air-cooled intermediate pressure compressor of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a configuration diagram of the entire system path of a compressor for carrying out the emulsification prevention method in the oil circulation type air-cooled intermediate pressure compressor of the present invention, and FIG. 2 specifically describes the emulsification prevention method. It is a flowchart for.

First, the overall configuration will be described with reference to FIG.
The general structure of the compressor includes an air cleaner 7, an air capacity adjustment valve 8, a compressor body 9, a receiver tank 10, an oil filter 11, an oil separator 12, an oil cooler 13 and an outer cooler 14, a dryer 15, and a solenoid valve 16. The compressed air is sent to the use side 17. The compressor of the present invention is an oil circulation type and has an intermediate pressure of 1.37 MPa, and uses an air cooling type.

  With the above configuration, air from the air cleaner 7 is introduced into the air capacity control valve 8 and introduced into the compressor body 9 in a state of being mixed with oil. The compressed air / oil compressed by the compressor body 9 is introduced into the receiver tank 10 and separated into air and oil. Note that mist of air and oil is generated above the receiver tank 10. The separated air and oil / air mist are further removed by the oil separator 12, introduced to the outer cooler 14 side, cooled, then dried by the dryer 15 and sent to the use side 17. On the other hand, the oil separated in the receiver tank 10 is sent to the oil cooler 13 side via the oil filter 11, and is again introduced into the compressor body 9 via the electromagnetic valve 16 for circulation.

  In the present invention, each means for preventing emulsification is provided in addition to the above configuration. The means includes a temperature sensor 5 for detecting the temperature of compressed air / oil, a fan 1 (actuated by a motor 2) that is ON / OFF controlled by the detected temperature, and an oil circulation amount and a circulation system depending on the oil temperature. An oil temperature adjusting valve 3 for controlling the pressure, a pressure gauge 6 for detecting the pressure of the compressed air, a pressure adjusting valve 4 for releasing the compressed air by this, and the like are provided. Hereinafter, these operations will be described.

First, temperature control that seems to be most effective for preventing emulsification will be described. A temperature sensor 5 is interposed in the middle of a compressed air / oil introduction pipe discharged from the compressor body 9. The temperature sensor 5 is electrically connected to the fan 1 and the motor 2 that air-cool the oil cooler 13 and the outer cooler 14.
As described above, since emulsification is affected by the temperature of compressed air / oil, control as shown in FIG. 2 is performed. First, the temperature of compressed air / oil is detected (step 100). It is detected whether or not this temperature is 98 ° C. or higher (step 101), and if it is 98 ° C. or higher (in the case of YES), the operation of the fan 1 that cools the oil cooler 13 and the outer cooler 14 proceeds as it is (step 102). On the other hand, when the temperature is 98 ° C. or lower (in the case of NO), the process returns to Step 100. Next, if the air cooler 13 or the outer cooler 14 continues to be air-cooled as it is when the temperature becomes 92 ° C. or lower, emulsification is likely to occur. Therefore, it is detected whether or not the temperature is 92 ° C. or lower (step 103). When the temperature is 92 ° C. or lower (in the case of YES), the operation of the fan 1 is stopped to stop the air cooling of the oil cooler 13 and the outer cooler 14 (step 104). When the temperature is 92 ° C. or higher (in the case of NO), the process returns to Step 102. Hereafter, this step is circulated and continued. This effectively prevents (reduces) emulsification in the medium pressure compressor.

  As shown in FIG. 1, an oil temperature adjusting valve 3 is provided on the side surface of the oil cooler 13. This internal structure is well known and will not be described. However, the oil separated by the receiver tank 10 is returned to the compressor main body 1 side again or introduced to the oil cooler 13 side to the compressor main body 1 side. It consists of what controls the amount of return oil. By controlling the internal structure of the oil temperature regulating valve 3 in advance corresponding to the medium pressure compressor, the temperature and amount of oil returned to the compressor body 1 can be controlled. Emulsification can be prevented.

  Further, as shown in FIG. 1, the air separated and deoiled by the receiver tank 10 and the oil separator 12 is divided in the middle of being sent to the outer cooler 14 side, and a pressure regulating valve 4 is provided in this dividing pipe. . The pressure regulating valve 4 is controlled by a pressure gauge 6 that detects the pressure of air. For example, when the air pressure in the distribution pipe exceeds 1.37 MPa, the pressure gauge 6 detects this and controls the pressure regulating valve 4 to release a part of the compressed air having a high pressure. Thereby, the pressure of compressed air can be maintained at 1.37 MPa, and as a result, emulsification can be prevented.

  As described above, the present invention is for preventing (reducing) emulsification in a medium-pressure compressor. However, the configuration is not limited to the above-described contents, and the same technical category. Of course, things apply.

  The present invention was invented for preventing (reducing) emulsification in an oil-circulating air-cooled medium-pressure compressor. However, the compressor is not limited to the above-mentioned pressure, and other values of medium-pressure compressors. Also applies. Moreover, it can apply also to an oil-cooled compressor instead of air cooling, and the utilization range is wide.

The block diagram which shows the whole structure of the compressor path | route for performing the emulsification prevention method in the oil circulation type air-cooled intermediate pressure compressor which concerns on this invention. The flowchart for demonstrating the effect | action of the emulsification prevention method in the oil circulation type air-cooled intermediate pressure compressor which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fan 2 Motor 3 Oil temperature adjustment valve 4 Pressure adjustment valve 5 Temperature sensor 6 Pressure gauge 7 Air cleaner 8 Air capacity adjustment valve 9 Compressor body 10 Receiver tank 11 Oil filter 12 Oil separator 13 Oil cooler 14 Outer cooler 15 Dryer 16 Opening / closing valve 17 Use side

Claims (2)

  The air from the air cleaner is mixed with oil by the air capacity adjustment valve and introduced into the compressor body with medium pressure (about 1.37 MPa). The compressed air and oil formed are introduced into the receiver tank and separated into oil and gas. The emulsification prevention method in the oil circulation type air-cooled intermediate pressure compressor that sends out the separated air to the use side through an oil cooler and an outer cooler and a dryer and circulates the separated oil again introduced into the compressor body, The method detects the oil temperature of compressed air / oil and controls ON / OFF of the air cooling fan of the oil cooler and the outer cooler, and controls the amount of circulating oil and air by adjusting the oil temperature of the separated oil. A method for preventing emulsification in an oil-circulating air-cooled intermediate-pressure compressor, wherein pressure is detected to control air pressure of compressed air.   The ON / OFF control of the air cooling fan is configured to turn on when the oil temperature of the compressed air / oil is 98 ° C or higher and is turned off when the temperature is 92 ° C or lower. A method for preventing emulsification in an oil circulating air-cooled intermediate pressure compressor.

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