11-9 Example analysis of transitional condition maintenance.
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11-9 Example analysis of transitional condition maintenance.

A factory implemented transitional condition maintenance on air compressor equipment, reducing maintenance workload, failure rate, and costs, while improving equipment availability. The process involved reporting, approving, and implementing maintenance items based on equipment status, with higher demands on staff abilities.
Chi tiết vụ án

Answer: According to the idea of transitional condition maintenance, a factory first selected representative equipment in each professional branch for condition maintenance. For example, the boiler branch has a large workload and high maintenance costs for air compressor equipment, so it conducts a pilot work of condition maintenance on air compressor equipment. The details are as follows:

First, the production and technical department reports and approves the cancellation of the planned maintenance items of the equipment, formulates the maintenance and maintenance items of the air compressor, and determines whether or when to implement each maintenance and maintenance item according to the operating status of the equipment.

Second, the maintenance department at the operating level is responsible for the implementation and recording of air compressor maintenance and the analysis report of air compressor operation. The content includes: oil replenishment, oil change quantity and time, three filter replacement and cleaning, water discharge, water drainage, cooler cleaning, cylinder refueling, operation time, exhaust pressure, temperature, operation current, voltage, operation fault record, equipment failure rate, etc.

The power generation department at the operating level compiles and is responsible for the operation data record of the air compressor. The content includes online monitoring data and offline monitoring data. The main online monitoring parameters include the start-up time, starting current, full load power, vibration value of each bearing, temperature of each bearing, lubricating oil temperature, oil pressure, etc. Offline monitoring parameters mainly refer to targeted test tests such as bearing vibration value, oil composition analysis, environmental parameter value, etc., in addition to equipment operation initial value, design parameter value, historical fault information, historical defect information, historical maintenance information, etc.

Third, fill in the equipment status report based on the equipment status and make equipment maintenance suggestions, and submit them to the professional level for the formulation and correction of maintenance strategies.

Sheet 11-1 is a comparison of the statistical data of a single air compressor in the factory under planned maintenance and condition maintenance conditions.

Table 11-1   Statistical data of a single air compressor under planned maintenance and condition-based maintenance
Data collection period: 2006 Jan. to Dec.

Statistical   items

Maintenance methods

Non-fault repair times

Fault repair times

Spare parts consumption

Labor costs

Equipment availability

Planned maintenance

Equipment is scheduled for overhaul 2 times/year, and equipment is scheduled for maintenance 11 times/year

The average number of operating failures is 2.8 times per year

Lubricating oil 230L, filter element 5

30 people per standard working day

94.6%

Condition Inspection

Equipment inspection and maintenance 7 times/year

Average operation failures: 0.7 times/year

Lubricating oil 180L, filter element 3

18 people per standard working day

97.6%

From the above examples, we can see that the implementation of condition maintenance for equipment reduces the maintenance workload, equipment failure rate, maintenance costs, and improves equipment availability. From the steps of transitional condition maintenance, we can see that the implementation of condition maintenance places higher demands on the ability of staff in various departments to summarize, analyze and deal with problems. Therefore, improving the basic management system of equipment, conducting relevant personnel training, carrying out basic technical work, and building a complete technical platform are the tasks to be completed from transitional condition maintenance to comprehensive condition maintenance.

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