Common problems in maintenance of construction machinery
With the development of mechanization is more and more widely used mechanical equipment, as our main source of production now, so we need to maintain regular maintenance in the use of mechanical equipment, so as to ensure the work efficiency and the work of mechanical equipment.
Common problems in maintenance of construction machinery
1 、 weak sense of maintenance
Some construction enterprises believe that the machine can be operated, can work under the condition of mechanical maintenance not only delay time, affect the project schedule, and costly and time-consuming, no mechanical equipment maintenance in a period of time will not appear what problem, even if the problem is not too late to do after the repair. As the old saying goes "disease in the cou, the soup ironing and also; in the skin, the needle can reach of stone; in the stomach, Qi and fire; in the bone marrow, life belong to it, but what is." (from "Bian Que" to see Cai Huan article) the check does not check the maintenance, maintenance, no glitches, only do not keep, until died, not mechanical work, just think of the lack of maintenance, too late, too late.
2, the relationship between maintenance and repair
Maintenance refers to the routine maintenance of the machine in normal use, and maintenance refers to the repair of the machine after failure.
Mechanical maintenance and repair can be separated, machinery in use without maintenance, the performance will be reduced, and long-term maintenance will produce failure, but declined, and the mechanical properties and maintenance of the fault not immediately reflected, there is a long process, easy to be misunderstood or ignored.
3, the maintenance system has not been implemented
Although some units have system, but do not have someone to responsible for the implementation of the system become empty, furnishings. This situation is very unfavorable to the normal use of machinery.
Machinery and equipment management department did not put the importance of mechanical maintenance to each mechanical related personnel, which led to the maintenance of machinery is only a slogan of the corresponding management department.
Many construction units that mechanical technical condition is mainly decided by the repair unit, think, homework is not finished mechanical strength, repair repair units have not kept pace with the poor. Some units and machinery management departments once when the engineering strain or field environmental conditions or other work, do not strictly enforce the provisions of machinery maintenance, not in accordance with the quantity and quality of maintenance requirements, but to see where the maintenance of faults where, where, where repair.
4, the scientific use of machinery and equipment
If an engine service life of ten thousand hours, the use of reasonable will extend thousands of hours. Otherwise, it will lead to premature damage. Scientific and rational use of machinery is very important to read the instructions after the arrival of a new device, familiar with the working principle of the machine, the machine working environment, to start to use the rear of the operator training, during use, should be strictly in accordance with the guidelines and operating instructions.
5, pay attention to the running in period
Generally speaking, the service life of construction machinery depends largely on the wear amount during the running in period. The new car for the first time must be running in. The general engineering machinery running time to 100 hours or more, the load is below 80%. Some enterprises do not attach importance to the construction of running, new machinery purchase directly is put into use. The new machine or after overhaul of mechanical equipment must be good running in, during the running period to control the speed and reduce work load, strengthen maintenance.
6. Start the engine correctly
The engine start is correct or not, has a direct impact on the service life of the engine. In general, start the engine again, the wear of piston ring and cylinder wear is equivalent to the normal work of the engine 1~2 hours. In order to reduce the amount of wear before starting the engine start, the crank crank crankshaft engine available, try to make the oil to reach the surface friction, short time parking, don't let the engine flameout, an engine start is no more than 30 seconds, and two times to start interval of one minute, continuous start time is too long will affect the battery and start the motor service life, especially should pay attention to in the cold winter, start the engine cannot start more than three times can no longer start, to find fault repair and inspection personnel immediately after the re start can be excluded.
7, to prevent mechanical overload work
Mechanical overload will lead to the engine and the transmission part of work overload. The test results show that when the engine speed is unchanged and the load is doubled, the wear of the engine is nearly doubled. The large work load will greatly shorten the service life of machinery.
8. Insist on medium load operation
Medium speed is the economic speed of the engine. Low speed match the parts to form a good lubricating oil film, the parts wear large; the formation of lubricant film can better speed, thereby reducing the amount of wear parts for high speed; friction caused higher temperature caused oil viscosity decrease, can not form a good lubricating oil film, so wear.
9. Improve the working environment and site of machinery
Construction machinery operating environment is generally bad, but some of the environment is also we can artificially improve. Try to make the site leveling and compacting machinery in the construction machinery and equipment, to avoid in the process of operation is heavy, severe vibration caused by factors such as equipment tilt, avoid operation, in the tilt of the site to reduce dust, avoid dust in operating a larger place, because dust will affect the service life of the engine.
10, temperature
Mechanical equipment is cool
