Rolling bearing clearance measuring instrument and measuring method

In a professional production and the unit of measurement, using a dedicated instrument measuring radial jump of rolling bearings. In the use of units, it is necessary to the simple and easy method can be used for measuring, approximate numerical values are obtained. The following is introduced related instrument and measuring method. 1, the radial clearance of measuring method, 1) Figure 1 X093C type is measured with a special instrument ball bearing radial clearance gauge type figure 2 X293 column bearing radial clearance gauge figure 1 and figure 2 as a unit of domestic production of several measurement of rolling bearing radial clearance of special equipment. The structure characteristics, using parameters and using method are shown in table 1. ( 2) Simple measuring method (1) insert the feeler gauge feeler method between the roller and outer ring, as shown in figure 3 a and 3 b. A little hard to fit the person, the thickness of filler gauge used for the location of the radial clearance. Should turn the bearing inner ring, in a three points on the circumference of a circle evenly measurement, average as the measured results. Figure 3 centripetal radial clearance simple measuring method of rolling bearing a) Oligonucleotides measurement method; b) Feeler method; c) The fuse pressure measurement method; d) Dial gauge measurement; (2) squeezing fuse measurement method use a fuse fuse ( Commonly known as the fuse) Insert the gaps between the two ball with the hand hold, fixed bearing inner ring and outer ring, the fuse squeezed between outer ring and ball, after extrusion, take out the fuse, squash with the outside micrometer to measure the thickness of the part dimension, namely the radial in addition to the size of the bearing, as shown in figure 3 c. Because the fuse was extruded parts in exit may occur after a certain amount of 'rebound', the measured value will be slightly bigger than the actual clearance value. (3) dial gauge measuring method a, as shown in figure 3 d, to press the bearing inner ring in a vertical plane of the plate, the bottom of the inner ring mat a layer of thin, outer ring and the tablet does not contact and by its own gravitational sag, gently turn bearing outer ring, make the ball contact with inner ring and outer ring channel center line. B, in the condition of the freedom of the bearing, with a dial indicator of measuring head on the side of the surface outside on the bearing outer ring ( In figure 3 d B direction) After middle, adjust the dial gauge measuring force, turn the table cover, the pointer on the zero ( When using digital display type dial indicator, will display the value zero) 。 C, hold the lower outer ring ( Figure 3 d in A side) And use appropriate force along the radial bearings ( The vertical upward) Push in the direction of the B side, the ball in A direction and are close contact with the inner and outer ring. Records of the dial gauge readings. The reading value is the bearing being measured at the position of the radial clearance. D, rotate the outer ring of Angle, and then repeat the above operation, the radial clearance values get several different angles. Average as the final result. 2, the axial clearance of the simple method to measure the axial clearance of rolling bearings generally confined to inside and outside the circle of relatively fixed centripetal ball bearings, special measuring instruments are available, and in the use of units, generally use the following simple method. Figure 4 deep groove ball bearing simple method for measuring the axial clearance ( 1) As shown in figure 4, the inner ring of the bearing pressure on a platform, the bottom of the inner ring mat a layer of thin, outer ring in on its own natural sinking under the action of gravity is not in contact with the platform, with a dial indicator in the center of the outer end face round at every interval of 90 ° measuring point on the circumference of a circle numerical and make records, when measuring the dial gauge pressure on bearing should be as small as possible, in order to prevent the other end of the cock. ( 2) The bearing outer ring overall upward pull up and maintain a stable fixed ( Pad support) With the same method as above and measurement value with four points. ( 3) Calculate each point of the difference between the two measurements, take the absolute value of mean value, measured axial clearance of the bearing is the final result.