The relationship between the failure of construction machinery parts and the use of maintenance

Reduced culverts when using reduced, longer working time, extended wear time, overhaul time can be seen from the above, in the run-in phase of the part processing surface has a fixed efficiency and accident failure, often found in the bulldozer medium and large repair gearbox gear Abnormal forms of failure include breakage of the gear end or deformation of the toothed tip and the stepped wear of the turbid gear.

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220 bulldozer gearbox gear failure and use of maintenance relations bulldozer gearbox gear is based on bulldozer long-term heavy-duty conditions work by the various forces designed and manufactured, there are safety factors and manufacturing equipment, guarantee, often he used a big whole, not Q. The operation of the machinery is a complex and lengthy process. If any operation is not correct, maintenance is not recognized, and the failure is not eliminated in time; if the phenomenon exists, various types of failures will occur and the effective use period will be reduced. The following is a description of the relationship between gear failure and maintenance. 21 According to the part wear rules, the process machine is a combination of many parts and components. It has long been operating in the field, and its working environment is harsh. It is easier to wear than the components of the general mechanical equipment. The effective use period is much shorter. Now it is a highway project. The 20 bulldozers commonly used in construction are taken as an example to analyze the failure of the transmission gears and illustrate the close relationship between the rational use of regular maintenance and the prolongation of the service life of the machinery to improve economic efficiency. =20 Bulldozer Gear Failure Mode D 120 Bulldozer can perform earthmoving operation. It is also possible to pull a scraper to carry out Yiyuan operation. It is a machine that is used on the highway for a medium period. The gearbox is a mechanical spur gear transmission that is commonly used in construction machinery. The advantage of this gearbox is that it is simple in structure, easy to manufacture, and easy to repair; its disadvantages are poor transmission, poor gear shifting, and gear wear.

These shortcomings determine that the factory gears must withstand large dynamic loads in addition to carrying the set load. In spite of comprehensive consideration of the influence of various factors, the gears have high bending strength, tooth surface contact strength and fatigue resistance. The high-strength toughness wear resistance is controlled by a higher manufacturing and assembly precision standard. However, with the use of machinery and the increase of operation time, gears are inevitably subject to various forms of failure. 1 Failure can be classified as normal wear failure. And the use of improper maintenance accelerates the wear loss and causes the bearing to burn out. So we stipulated the scrap standard as the viscosity of engine oil 14. The viscosity of the engine oil dropped to 9.5. When the heart is at 8, the oil change is a reasonable sampling test to control the oil quality. 5 The original structure is flawed by 1 It can be seen that when the bearing is being lubricated, the amplitude modulation device is used to stir the oil. The lubricant oil flies along the circumference of the amplitude modulation device and flies to the casing, and then is reflected in a straight line to form splash oil mist. The oil mist penetrates into the bearing body. This kind of shock lubrication It is not enough. Lubrication in shafts and bearing gaps can not be carried out due to the lack of oil passages and the frictional heat generated by the bearing operation will cause the operating temperature of the bearings to rise, the viscosity of the lubricants to decrease, and the thickness of the oil film to decrease. 4 Troubleshooting Measures When assembling or repairing, Make the shaft shaft eccentricity of the two bearing housing holes to be within the specified range; the roughness of the eccentric shaft surface should meet the requirements; determine the reasonable index of the oil product and install the oil quality on the bearing housing. Fill the oil passage or increase the tubing, improve the lubrication of the bearing, heat capacity 5 Conclusion We have improved the mechanical failure of these two machines, in the bearing seat hole, set up the oil passage, strict control of various types of errors during installation Within the scope of the regulation, when regularly monitoring the oil's various indicators, we use this machine to enter the hall and apply more than one, vibrating grind without any failure. The practice has proved that this practice is successful. , Zuzu dry. The application of lubrication theory in the design of crankshaft bearings. Bearing system theory and practice friends. Beijing Mechanical Industry published the relationship between the failure of mechanical parts and the use of maintenance engineering machinery Zhang Aiping, Wu Yulin period, the beginning of the early stage of silver production and overhaul machinery, such as careful implementation of the assembly after the run-in and the use of early closure rules can reduce the initial wear and tear, 88 is this period The amount of wear reduction, in the normal use phase, the curve is relatively flat, indicating that the part wear has been relatively stable, but the correct use, serious maintenance can also reduce the wear rate of this period, so that the curve is more gentle by reducing the initial wear and reduce the wear of normal working period Rate, can make the actual effective use period longer than the specified use, that is, it is also longer than the wear of one wheel! The above rules. Therefore, if the use + maintenance work is done well, the effective use period can exceed 1 overhaul period; if the maintenance is not properly used, the bulldozer will have to replace some of the gears of the transmission when it is being repaired, and even worse, accidental damage occurs. , Shorter lifespan 2.2. To work frequently, it's not easy to use it. When you use it, it often happens that the walking time is too short, the load is too heavy, the micro-level meshing tooth surface is excessively rubbed, and the tooth is scratched. Inadequate operation of the gearbox even when the gearbox is seized during operation can seriously damage the gear. When the gear is grabbed, the clutch starts to disengage, and the gear is still under gearing at a high speed, so that the two only need to enter the meshed gear. With great impact, many times of grabbing the gear, the gear is subjected to the dynamic load that exceeds the designed capacity, and the gear end will be quickly broken or smashed. This repeated impact force not only directly damages the gear, but also accelerates. Spline deformation, bearing loose, deformation of the drive shaft, resulting in gear misalignment, meshing is not correct, in turn, the gear will cause abnormal wear and tear, gear teeth sharpened, tooth tread wear out the ladder from time to time Raising with the gap adjustment time can not be serious and difficult to rule out-gear, clutch is not complete failure, will also be a greater gear wheel causing undue impact damage.

Can not regularly check the replacement of lubricating oil, so that the oil becomes bad or lack of oil, the gear will work in the presence of impurities or dry friction, it quickly sharpened, into a production gear rubber, the above few enough to explain the use of the machinery In the case of improper operation and careful maintenance, the service life of the gears will be greatly reduced.

23 The actual use of the small road shows construction on the highway. There are differences in the technical quality and sense of responsibility of the mechanical operators. Actually, the same mechanical equipment and the same working conditions often occur, but the mechanical technology status is very different. The captain who has a red flag equipment for the same 20 earth-machine tracking survey Due to its high technical quality and strong sense of responsibility, it is well-versed in the operation and maintenance troubleshooting of the mechanical construction principle used by itself, and is diligent in maintenance. No matter how bad the construction conditions are, how bad the climate is, the maintenance before the class is done seriously. In detail, even if he is not his class, he will go to the construction site and the machine 4 times to complete the maintenance before leaving, and he actively participates in the protection of all levels, and can eliminate all kinds of faults in time, so he operates the bulldozer. The production rate of perfect rate utilization ranks first, and 10001 is exceeded in the machinery. During the repair, the gears of the transmission have not been abnormally worn or damaged. Gears meet the repair technology standard. The bulldozer with only two bearings for the gear change unit can continue to throw off the bulldozer on the same construction site. Due to the poor operation and maintenance, there are many breakdowns in the normal operation, the utilization rate of the good ratio is low, and the consumption of large production capacity cannot go up. In mid-repair dismantling, gearbox 15 gear fixed gear 5 gear sliding gear wear exceeds the limit, 12 gear sliding gear consecutive teeth tooth end broken, when the assembly was changed for the gear and all the bearings control the two machines obviously seen The correct operation, serious maintenance of the Yin to reduce the wear of gears, to prevent the occurrence of failure, to extend the service life of gears, plays a great role, but also to ensure the machine's intact rate of work, improve the economic efficiency of the machinery 3 Conclusion above Gear inefficient gears before the machine. The 6-cylinder analysis of Nakawa Maintenance can be applied to bulldozers as well as various engineering machines. The more advanced machinery and equipment divisions should just be denser, the more meticulously operated and carefully dimensioned, and now the road construction industry has implemented the bid competition mechanism, and a strong mechanical construction team is an indispensable prerequisite, so it is necessary to purchase New mechanical equipment outside. How to extend the focus of existing mechanical personnel 1 to avoid the need to make equipment for short-term economic benefits in order to achieve a one-way progress, and to do a good job of rational use and regular maintenance of machinery, so that mechanized construction will be on the path of benignity. Create a good economic benefit, received date 2000 ye 4 ye 7 Changzhou Huacheng Shuangkai Instrument Co., Ltd. The original Changzhou Electronic Instrument Factory, asphalt paver automatic leveling device for asphalt concrete booths; shop. Graders and other pans are used to level the control of construction machinery. The device is subdivided into 5 types of towel width, single vertical type 1, 5, 1 width, double vertical.

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