What are the methods for checking the pump shaft during operation of the high temperature heat transfer oil pump?

What are the methods for checking the pump shaft during operation of the high-temperature heat-conducting oil pump? 1. When the high-temperature heat-conducting oil pump is in operation, if the vibration, impact or sudden increase in torque occurs, the pipe-type high-temperature heat transfer oil pump shaft will be bent or broken. What is the method for checking the pump shaft during operation of the high-temperature heat-conducting oil pump 1. If the high-temperature heat-conducting oil pump is in operation, if the vibration, impact or sudden increase in torque occurs, the pipe-type high-temperature heat transfer oil pump shaft will be bent or broken. For certain dimensions on the pump shaft (such as the journal size at the point of engagement with the impeller, rolling bearing, and coupling), the micrometer should be used to measure dimensional accuracy.
2. The measurement of the straightness deviation of the pump shaft of the high-temperature heat-conducting oil pump is also carried out, so as to grasp the correct data of the straightness deviation of the pump shaft. First, place the pump shaft between the two tips of the lathe, set two dial gauges at appropriate places on the pump shaft, divide the outer circumference of the journal into four equal parts, and mark them separately, ie 1, 2 3, 4 four points. Slowly turn the pump shaft by hand, record the readings of the dial gauge at the four points in the table, and then calculate the straightness deviation of the pump shaft.
3. The straightness deviation value is calculated as: half of the difference between the two relative measuring points of the dial gauge in the diameter direction. For example, the straightness deviation in the 0° and 180° directions of the I measurement point is (0.36-0.20)/2=0.08 mm. The linear deviation in the 90° and 270° directions is (0.28-0.27)/2=0.05 mm. Using these values ​​to select a certain ratio on the graph, the bending amount and bending direction of the maximum bending point on the pump shaft can be approximated by a graphical method.
4. Check the key connection. The two ends of the pump shaft are respectively matched with the impeller and the coupling, and the two sides of the flat key should have a small interference fit with the side of the keyway on the chest shaft, and the two sides of the key groove of the impeller hole and the key hole of the coupling hole are Transitional cooperation. When checking, you can use the vernier caliper or micrometer to measure the size. If there is a gap between the width of the flat key and the width of the keyway on the shaft, regardless of the gap value, you can assume that the flat key has lost its useful value. The high-temperature heat-conducting oil pump should be re-trimmed according to the actual width of the keyway. The two sides of the keyway should be perpendicular to the bottom surface of the keyway. If there is any inclination or unevenness, repair it in time.
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