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Date:2011-08-05 5:38:59
Along with the rapid economic development of our country, car, engineering machinery, etc to be widely applied, has become the worlds manufacturing power, but the overall technology is relatively backward, go against our country becomes the world manufacturing power. Especially in the transmission system of, at present there are three big problems: oil seal leak, bearing damage, gear play teeth or noise, become the general manufacturing enterprise problem, with large-scale production, the more problems. Among them with oil seal leakage especially prominent.
Oil seal leakage problems to solve, must from three aspects:
A. Reasonable assembly control;
2. Make oil seal assembly process management work;
3. Oil seal their own quality.
In the domestic numerous users to appear after oil leaks first thought of oil seal their own quality problem, therefore, continuously change oil seal suppliers, but the problem is still not fundamentally solved. Think like this problem itself not wrong, oil leakage can be supported and the relevant, but this is not the only factor.
We think oil seal their own quality should be made by manufacturers to control oil seal, the factory must have strict simulation test, as users, the key is to do well the work of two before, in the first two work well, under the condition of oil seal still leak, we have may doubt the problem of its own oil seal, or easy to enter a dead circulation, difficult to catch the key problem, break them one by one, to solve problems.
A, reasonable assembly control
In the cone bearing of the transmission system of, oil seal assembly quality control including: oil seal of the pressure equipment and cone bearing preloaded force control.
1. In the oil seal assembly of oil seal of being very key, press-printing quality is bad, easy cause early oil leakage, being in process must avoid two points:
1) prevent oil seal pressure deformation;
2) prevent pressure fashionable oil seal no positioning
2. To have the cone bearing on the transmission oil seal, preloaded force reasonable or not, will decide the life of oil seal, decided to long-term oil leakage or not; Often oil seal leak, many manufacturers will think of and oil seal pressure machine quality and pressed on the quality, but ignore the key point.
Cone bearing preloaded force is reasonable, good location, oil seal running normally
Because not only is cone bearing support inheritance shaft, and the role orientation, if preloaded force close, bearing overheating, easy cause oil seal aging. Preloaded force is too small, transmission shaft axial channeling move, radial run-out, axes and oil seal lips mouth clearance, in rotation process, not even, cause oil seal life and reduce oil leakage. Therefore, according to the product use situation, set reasonable prestressing force to improve oil sealing service life.
Two, make oil seal assembly process management
Our country is the transmission from the traditional manual production fast into the large-scale production in, most enterprise production, ideas did not keep pace with The Times, especially assembly. Scale assembly must be prepared to fine production.
In the whole process of oil seal assembly, we must complete the following links:
1. Oil seal before assembly, pay attention to avoid pollution or dirty;
2. The pressure equipment should be cleaned, can not have the burr, avoid scrape oil pollution;
3. Pressure fashionable guarantee oil seal lips mouth from scratch.
4. Assembly process protection oil seal from harm. Such as: in the wheel assembly, wheel hoisting to rear axle and outfit, due to the inner ring with after bearing, wheel hub because falling dead weight, lead to squeeze oil seal deformation. This is also led directly to the oil seal leakage is the main reason for the early.
Assembly process in pressed oil seal
In addition to the above work well, oil seal complete assembly with air test after Suggestions, check the assembly to whether there is a leak, form the assembly, control, inspection trinity role, ensure unqualified not into the market.
Oil seal leakage and parts surface quality, reasonable tolerance matching also have relations, need to consider to plan as a whole.
In a word, for the settlement of oil seal leakage problems, must grasp key point, first to solve the problems of assembly process, second to test whether oil seal quality requirements. The same oil seal, assembly quality of ascension that greatly prolong service life, thus fundamentally solve oil seal leakage problem, achieved the international first-class standard.