Maintenance and repair technical version of the acrylonitrile air compressor control oil circuit secondary oil pressure difficult to solve the problem of high-rise tidy refinery company polymer plant acrylonitrile workshop, Heilongjiang Daqing 163411. The acrylonitrile workshop of Polymer No. 1 of Daqing Refining & Chemical Co., Ltd. has a set of air compressor units consisting of NG32/25/0 back pressure steam turbine and MCL-804-6 centrifugal compressor. The air compressor unit mainly supplies compressed air of 0.2 MPa and 160.<3 for the reaction of the device. The lubricating oil control system of the air compressor unit is composed of a starting system, a speed regulation system and a protection system. The starting system consists of a starting device and a quick closing valve. The starting device controls the switching of the quick closing valve by means of the quick closing oil, and limits the output of the amplifier; the speed adjusting system is composed of a Woodward governor, an amplifier, an oil motor and an adjusting air valve. The speedometer compares the measured speed from the turbine shaft with the set speed. When a deviation occurs, the regulator link moves and transmits the information to the amplifier, thus generating a corresponding secondary oil, and the secondary oil controls the oil engine action. Thereby controlling the regulating valve to adjust the rotational speed until it is the same as the set value. It is the initial state diagram of the lubricant control system, the value of the security guard 10 is set to the maximum, and the Z-axis manual return point is normal. Change the value of the Z-axis software limit parameter in the machine system again to the original value of 7 000. This alarm occurs again when the Z-axis returns to the point. This indicates that there is no problem with the machine collision block, and the position of the deceleration switch may be loose. The specific inspection found that the position of the deceleration switch was indeed loose, and the position of the fixed deceleration switch was re-adjusted, and the problem was solved. The point of CNC machine tool plays an important role in the CNC system, which is an important part of ensuring the machine tool. The fault can be summarized as: zero point switch fault, encoder fault, system control board fault, zero point switch and hard and soft) limit The position is close, and only a comprehensive understanding of the point of the CNC machine tool can well solve various problems that occur when the machine returns to the point, ensuring that the machine tool works continuously and efficiently.
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