Method for selectively matching face-to-face and back-to-back assembled bearing space rings by using pre-tightening force

Abstract

The invention provides a method for selectively matching face-to-face and back-to-back assembled bearing space rings by using pretightening force, which comprises the following steps of 1, forming a bearing assembly by using an inner space ring, an outer space ring and two sets of face-to-face or back-to-back bearings, and applying axial pressure to an outer ring or an inner ring of the bearing at the upper end, 2, when the axial pressure reaches the lower limit value of the pre-tightening force needed by the bearing assembly, detecting the force needed by the outer or inner space ring from static to dynamic, and conducting preliminary judgment, and 3, when the axial pressure reaches an upper limit value, detecting the force required by the outer or inner space ring from static to dynamic, and judging whether the space ring meets the pre-tightening force requirement of the bearing assembly or not. According to the method, the force required by movement of the outer or inner space ring is measured in a manner of applying the pre-tightening force in actual assembly when the axial pressure is loaded to the lower limit value and the upper limit value of the pre-tightening force required by the bearing assembly, whether the space ring meets the matching standard or not is judged, and the form and location tolerance and elastic deformation of the space ring are considered in the process; and the pre-tightening force of the actually assembled bearing is kept consistent with the expected pre-tightening force, so that the bearing is ensured to reach an expected use state.

Description

technical field [0001] The invention relates to the technical field of bearing spacer ring selection and matching, in particular to a method for selecting and matching face-to-face and back-to-back bearing spacer rings by using pretightening force. Background technique [0002] Angular contact ball bearings are usually used in combination with two sets of bearings, such as figure 1 The shown DF matching (face-to-face matching) bearing includes the first bearing 10 and the second bearing 20, the narrow side end face of the outer ring of the first bearing 10 is set opposite to the narrow side end face of the outer ring of the second bearing 20, and the two sets of bearings An inner spacer 30 and an outer spacer 40 are arranged therebetween. Additionally, there are figure 2 The shown DB matching (back-to-back matching) bearings include the first bearing 1 and the second bearing 2. The wide side end face of the outer ring of the first bearing 1 is opposite to the wide side en...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of using pretightening force to select and assemble bearing spacers face to face, so as to solve the problem of actual assembly of bearings caused by existing spacer selection methods that do not consider the shape tolerance and elastic deformation of spacers. There is a gap between the preload force and the expected preload force; the purpose of the present invention is also to provide a method for back-to-back assembly of bearing spacers using preload force to solve the problem that the existing spacer ring selection method does not consider the spacer rings. There is a gap between the preload force of the actual assembled bearing and the expected preload force due to the geometric tolerance and elastic deformation

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