Lanzhou Petrochemical Electromechanical Instrument Operation and Maintenance Center predicts maintenance to escort the production of the device

On the morning of December 22, as soon as they went to work, Liu Yinsong and Chen Hao, deputy directors of the third department of the electrical department of Lanzhou Petrochemical Electromechanical Instrument Operation and Maintenance Center, walked to the power plant area of the fertilizer plant with one vibrometer and the infrared thermometer in one person.
Timing monitoring is a microcosm
of the daily work of equipment condition monitoring in the basic workshop of the electromechanical instrument operation and maintenance center.

"'Predicting maintenance, doing it all at once' is the working philosophy of our equipment managers, and only by being fully prepared for battle can we win steadily
.
" Liu Yinsong said
.

Change from "reactive" to "proactive"

"The P101A motor is running well and the vibration value has returned to normal
.
" Chen Hao looked at the calculated spectrogram that had just been collected and said
to Jiang Zhe, a technician who came to inquire about the results.

Previously, Chen Hao in the power unit A boiler site, the key equipment P101A boiler feed pump condition monitoring, found that the motor vibration speed value compared with the previous has a significant upward trend accompanied by noise, they through the vibration trend chart for calculation and analysis, determine that the motor fan blades are faulty, and the first time to notify the maintenance personnel for maintenance, after disintegration found that the fan blades have cracked 20 mm
.
Because the "seeds" of hidden dangers were detected and killed in advance, a A boiler shutdown accident
that could be caused by the burning of the motor was avoided.

"What we have to do is to take the initiative to continuously monitor the equipment in the normal state, investigate the abnormal state clearly, and repair it in time, rather than waiting for the equipment to be repaired in a hurry, which is too passive
.
" Chen Hao said
so.

Since the beginning of this year, the three departments of electrical have increased monitoring efforts on all production units of fertilizer plants and ethylene plants and petrochemical plant aromatic plants A and B key equipment, analyzed vibration trends and classified and archived, formed equipment files, up to now, timely found and dealt with desulfurization vacuum pump 04P0602 and desulfurization impeller (star) feeder 04A0304 bearings, acrylic P-8131A chilled water pump bearing failure, eliminate hidden dangers 12 times
.
Among them, it was found that the bearing was short of oil 5 times, and the lubricating grease was replenished in time to avoid the bearing damage life
due to long-term dry rotation.

"Device Medical Records" is really easy to use

Speaking of "equipment medical records", it is a unique way of paying attention to equipment in the third department of electrical, which mainly targets equipment that is close to exceeding the standard in a "sub-healthy" state, but temporarily cannot meet the maintenance conditions, and gives early warning signals
to relevant equipment management personnel.
The "medical record" records the model, vibration value, temperature, and problems and suggestions that need attention to the equipment in detail, so that everyone can pay attention to the operation
of the equipment.

In early September, the employees of the power electrician shift found that there was a fault
when monitoring the condition of the C boiler coal feeder.
After a precise calculation, the point of failure is locked in the outer ring
of the bearing.
Because it is an initial failure of the bearing, the workshop immediately issues the equipment "medical record" and requires the power electrician class to carry out special equipment care management
.
At the same time, in order not to affect production, workshop technicians contact the production workshop in advance according to the results of condition monitoring and analysis and prepare bearings for maintenance
.
On October 25th, the C boiler was briefly stopped, and the maintenance team immediately carried out a state overhaul of the coal feeder, and after dismantling, it was found that the outer ring of the bearing had heavy wear marks, and due to sufficient preparation, the overhaul
was completed in only 2 hours.
At present, the C boiler coal feeder is in good operating condition
.

"Thanks to this 'medical record', the maintenance class was able to complete the inspection
in the shortest possible time with quality and quantity.
" Li Donggang, the leader of the maintenance class, said
with emotion.

Up to now, this workshop has issued a total of 24 equipment "medical records", with an accurate prediction rate of 99.
8%, providing a solid guarantee
for equipment operation.