What are the advantages of the oxidation stability rotating oxygen bomb method
2018/5/17 Viewers:
The oxidation stability Rotating Oxygen Bomb Method (also known as rotating oxygen bomb oxidation test ZBE34011) is a fast oxidation stability test. The content of the method can be summarized as follows: in the glass test cup of stainless steel oxygen bomb, adding 50g test oil sample, under the presence of distilled water and copper coil catalyst, after filling 0.65MPa oxygen, the oxygen bomb is 30 "angle" and 100 + 5r/ in the oil bath of the prescribed test temperature (turbine oil 150C, transformer oil 140C). The velocity of Min is rotated in the axial direction. When the pressure on the oxygen bomb is connected to the pressure gauge on the automatic recorder, the pressure of oxygen drops from 0.2MPa to the end of the test. That is, starting from the start of an oxygen bomb, the time when the oxygen pressure is down to 0.2MPa at the highest point is expressed as min, as the oxidation life of the rotating oxygen bomb test. The oxygen elastic pressure drops 0.2MPa, which is generally equivalent to the induction period of new oil. The longer the pressure drop takes, the better the oxidation stability of the oil; on the contrary, the worse the oxidation stability is. The service life of general new oil is more than 200Min by rotating oxygen bomb method. For example, Japan proposes that when the service life of turbine oil is less than 50min, oil must be changed. The United States proposed the life of the operation of the transformer oil and oxygen bomb, which should be 80min or better. In the United States ANSI/ASTMD3487-82 "the mineral insulating oil in the electrical equipment (adding inhibitor standard"), the oxidation stability Rotating Oxygen Bomb expelling test index is not less than 195min. by the above visible, the advantages of the rotary oxygen bomb oxidation stability test method. Many, it is not only a short time (in general 4H can be completed), and the test process is relatively simple, no special chemicals, no acid value, called precipitate and other complicated operations. Therefore, it is suitable for the field as a monitoring means. At present, this method is still under study in China.
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