It can be used as a user to recheck the axial direction of double-row tapered roller bearings on site.” The foreign company’s “protrusion method” measuring instrument is equipped with a counterweight device to measure different sizes When double and four-row tapered roller bearings have axial clearance, the counterweight can be adjusted to meet the measurement requirements.

Fourth, the conclusion JB/T8236—2010 stipulates that “load blocks are added to the outer ring during measurement, and the load value should ensure that the rolling elements are in uniform contact with the raceway. Manufacturers and users of the main engine have explored various alternative measurement methods in practical applications. The users of the main engine often need to recheck the axial clearance and measure the double and four-row tapered rollers in accordance with the standard 'split method' When bearing axial clearance, a height gauge is used to determine the distance between the end face of the ring and the measurement platform.

The 'whole method' is currently an alternative measurement method widely used by users of the main engine. The manufacturing principle of the counterweight device is also very simple, and can be manufactured by ordinary bearing manufacturers.4 times that of the 'protrusion method'. This is due to the 'integral method' measurement, due to the self-locking problem of the next row of rolling elements, the gap measurement value is greater than its actual value, resulting in the actual clearance of the bearing when the clearance configuration is greater than the true value. The 'protrusion method' is a measurement method with accurate measurement and high measurement efficiency. The requirements for Wholesale Mechanical ball bearing manufacturers the bearing test platform are high, and it is difficult for users to achieve it on site.

Some foreign companies have adopted the 'projection method' when measuring the clearance of double and four-row tapered roller bearings without spacers, and have developed special measuring instruments, as shown in Figure 1. , Improve measurement accuracy, and then make beneficial improvements for bearing rotation accuracy increase, vibration reduction, and life extension.

The difference in the measured values ​​obtained by different measurement methods forces bearing manufacturers to increase the axial clearance value to 'match' the user's measurement method when configuring the clearance, causing the actual bearing clearance to be greater than the measured value, thereby reducing the rotation accuracy of the bearing and increasing the bearing Vibration and noise during operation will eventually reduce bearing life. Three, data analysis The measured data of the three measurement methods are shown in Figure 3. To sum up, learn from the principle of the foreign company's 'protrusion method' measuring instrument, make simple tooling to carry out double and four-row tapered roller bearing axial clearance test experiments, and compare and analyze the results obtained by different measurement methods.

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