Valve seal small parts, large use
Most of the time, we always think to burn oil were "ring".While ignoring the small accessories, that is: valve seal.In fact, several important parts of the engine burning oil, "contribute a lot" is the valve seal, a large part of the consumption of the oil is from aging or wear away the place of the valve seal into the combustion chamber caused by!
Valve seal because in addition to natural aging of rubber material hardening leads to failure, there is another reason should not be ignored: the carbon deposition on the valve stem.
The valve lift can infinite adjustment between 0.2 mm to 0.2 mm, this means that when the vehicles in urban areas for a long time the idle or low at the accelerator, the valve opening is very small, the valve stem can produce carbon deposition.
When the carbon deposition to a certain thickness, its engine need high power output, such as high-speed run, valve schedule get longer, the carbon deposition on the valve stem will abruptly with the valve seal sealing rubber friction, wear discouraged oil leakage.
The effect of oil seal oil seal, oil seal is installed on the shaft, isolated oil or fuel, from medium such as air or dust damage.Oil seal of the mechanical structure includes a metal skeleton rubber package, and set in the sealing lip of a spring.Spring ensures that the labial ministry appropriate hold between rubber and axis force, dustproof lip effectively isolate the harmful substances.
Oil seal installation position is different, can be divided into: before the engine crankshaft oil seal, after the crankshaft oil seal, camshaft oil seal, valve seal;Wave tank oil seal, oil seal after wave box, before the transfer case oil seal;Differential oil seal;The front oil seal, the rear oil seal;The direction of oil seal, shock absorber oil seal, oil pump, oil seal, etc.
Valve seal: jointly by outer skeleton and fluorine rubber vulcanization, diameter mouth since spring or steel wire, used for engine valve guide rod seal, is a kind of oil seal, the smallest.
Post time: Aug 17, 2018