Common lubrication problems of jaw crusher and how to deal with them
The oil quantity of the 4 branch oil pipes of the jaw crusher is adjusted by the adjusting bolt of the oil flow indicator, which will cause uneven oil distribution in each branch if it is not adjusted properly, with some lubrication points having large oil quantity and some lubrication points having small oil quantity. In the oil supply sufficient general will not be a problem, but in the oil pump failure or tank oil level is too low, due to the decline in oil supply will lead to some branches of the oil supply shortage. Insufficient oil supply makes the lubrication point of semi-dry friction or dry friction, a long time will make the jaw crusher bearing wear increased, the temperature rises, when the temperature reaches the melting point of the bearing alloy, it will cause burning tile accident.
A common mistake in operation is to adjust the oil flow of each branch of the jaw crusher to the maximum, mistakenly believing that this is the best state of oil supply, but in fact, this has lost the function of flow regulation, because the resistance of each branch of the jaw crusher is different, the resistance is small, the flow is large, the resistance is large, the flow is small, so there is bound to be uneven oil flow.
The correct method should be to observe the oil flow indicator of the jaw crusher for flow adjustment, or you can adjust the oil flow according to the oil pressure gauge indication. When the pressure gauge is before the regulating valve, the pressure value is proportional to the resistance of the corresponding branch, and the high oil pressure indicates that the oil flow in the branch is small, so the flow should be adjusted to make the pressure lower, and vice versa.
In addition, the pressure drop of the jaw crusher pipeline should be considered. The pressure of the branch away from the main oil supply pipe should be lower, and the branch near the main oil supply pipe should be higher. In addition to observing the oil flow indicator, the oil pressure value at each point is also an important parameter during movement.
In order to prevent the jaw crusher bearings from being damaged or even burned due to oil pump failure or oil circuit blockage, it is recommended to use YZQ-II oil flow indicator with dry reed tube inside, which can automatically issue a dangerous status signal when the oil flow is interrupted or the flow is lower than the safe flow limit, warning people to exclude the oil supply failure of the jaw crusher in time.
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