Another problem of the bearing is the amount of axial movement, that is, the axial tolerance. Changes in the structure of the hose With the continuous development of rubber roller technology, it has experienced the development process of single-layer hose, double-layer hose and aluminum-lined hose. Therefore, the reasonable choice of grease and filling amount should arouse the attention of all levels of management personnel and rubber roller manufacturers in textile enterprises.
Test analysis of different radial clearances In view of the shrinkage of the aluminum-lined rubber tube bearing shell, a tracking test was conducted in a textile factory in Zhejiang. The bearing seal will be damaged when the bearing is disassembled, and the high-temperature lubricating oil in the bearing will leak out, which will cause the bearing to run abnormally, and seriously cause the bearing to jam, and the ball may fall to crush the printer roller. Precautions for cleaning new bearings Since there is anti-rust oil in the new bearing, it needs to be cleaned twice with 120# gasoline and placed vertically to fully drain the mixture of gasoline and anti-rust oil in the bearing, and then wipe the surface with a fine cloth.
Too small a clearance often makes the lubricating oil not in place, especially the structure of a single slide, because it contains less grease,Wholesale Clutch Release Bearing manufacturers it will cause abrasion, and it is difficult for metal particles to be discharged with the creep of the oil.010mm and the evenness data is obviously better than the 'tight clearance' bearing.
When installing and disassembling bearings or accessories, pay attention to the following points: When making aluminum lining rubber roller sleeves, it is necessary to fully clean and dispose of the new bearings, strictly control the shell diameter tolerance, so that the inner hole of the aluminum lining roller and the bearing shell form a reasonable interference fit; regularly check the 'five gaps' of the roller sleeve machine And 'One Concentricity'
At this time, there is both radial displacement and angular displacement between the axis lines of the two shafts. 3.1, the choice of reference site Shaft misalignment It is very important to correct the axis position deviation of the coupling to determine the reference position, such as centrifugal horizontal pump unit, fan without speed increase and other equipment, the reference position should be the non-motor end; with speed increase, with coupling For large blowers, turbines, and steam turbines, the reference part should consider the cumulative error value formed by the motor end in the final adjustment process.
The part with long operation period, standard parts, and small deviation of the thermal expansion center line is regarded as the reference part. 2. What is the 'alignment' of the coupling? After the unit is installed or overhauled, by adjusting the height and left and right positions of the rotors, the axis of each rotor of the unit can form a continuous smooth curve without bending points during operation, that is, the axes of adjacent couplings of the rotors are concentric during operation, and the end faces Parallel, this adjustment process is called alignment. Analysis of shaft misalignment coupling deviation The axis space position of adjacent couplings has the following four states, as shown in Figure 1. The measurement record is shown in Figure 4. 5) Measurement and recording: When measuring, first measure the radial reading a1 and the axial reading s1 at 0° azimuth.
Double meter measurement method (one point measurement method) Two dial gauges are used to measure the deviation value of the outer circle and the end face of the coupling in the same direction, so it is also called the point measurement method, that is, while measuring the radial reading in a certain direction, the same direction is measured. Rotate the coupling halves to the point 2 position, and record the values of a2, s2′, s2″; rotate the two halves Coupling to the point 3 position, record the values of a3, s3', s3″; rotate the coupling halves to the point 4 position, record the values of a4, s4', s4″; rotate the two coupling halves to Point 1 position, table 1, main meter, auxiliary meter in the fog level value a1=0, s1′=0, s1″=0, confirm the correctness of this group of measured values. At Wheel Bearing manufacturers this time, there is an inclined angular displacement between the axis lines of the two shafts (the inclination angle is α).3. The main disadvantage is that for couplings with axial movement, errors will occur in the axial degree of the end face when the rotor is tuing.
According to the division of the coupling points in Figure 2, adjust the table 1 and the main table to the position of point 1 and zero. When s1=s3, a1≠a3. To Figure 4 Dividing point measurement record of dial indicator Through the analysis and calculation of the measured values, the relative position of the two axes in space is determined, and then adjusted according to the calculation results. There are large distances in the middle and precision or high-speed running coupling equipment, such as steam turbines, blowers, Alignment of couplings such as turbines. The common cause is shaft movement or loose anchor bolts.