Device and method for measuring friction coefficient between bearing inner ring and bolt surface
A technology for bearing inner ring and friction coefficient, which is applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problem that the secondary sliding friction coefficient between the bearing inner ring and the bolt surface cannot be measured
Active Publication Date: 2020-03-27
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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However, the above measurement method measures the friction coefficient of the primary sliding of the inner and outer rings of the bearing, that is, none of the existing measurement methods can measure the friction coefficient of the secondary sliding between the inner ring of the bearing and the surface of the bolt.
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[0040] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0041] The following specific embodiments provided by the present invention can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
[0042] figure 1 It is a structural schematic diagram of a friction coefficient measuring device between a bearing inner ring and a bolt surface provided by an embodiment of the present invention, figure 2 for figure 1 The illustrated embodiment provides a cross-sectional view of a bearing assembly to be tested and a corresponding supporting structure in the friction coefficient me...
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The embodiment of the invention discloses a device and method for measuring a friction coefficient between a bearing inner ring and a surface of a bolt. A to-be-measured bearing assembly comprises twoaccompanying bearings, an accompanying bush, a rotary loading bush, a bolt and a bearing inner ring. A force loading module is used for loading a radial load to the bearing inner ring through a bearing inner ring clamping piece and recording a loaded radial load value; a torque measurement module is used for measuring a load torque value borne by the bearing assembly to be measured during rotation; the difference between the load torque value and the additional torque values of the two accompanying bearings is a correction torque value of the inner ring of the bearing and the surface of the bolt; and the friction coefficient between the bearing inner ring and the surface of the bolt is the slope of the relation curve of the correction torque value changing along with the radial load value. According to the embodiment of the invention, the situations of uneven stress, sliding friction interference of other assemblies and the like can be effectively eliminated, so that the static friction coefficient and the dynamic friction coefficient of the bearing inner ring and the bolt surface are effectively measured.
Description
technical field [0001] The present application relates to but is not limited to the technical field of friction coefficient measurement of aeronautical structures, especially a device and method for measuring the friction coefficient between the inner ring of a bearing and the surface of a bolt. Background technique [0002] In the hinge structure with bearings, if the bearing has a locking failure, it must be ensured that the hinge can overcome the static friction between the inner ring of the bearing and the surface of the bolt to slide effectively. This kind of sliding is different from the sliding of the inner and outer rings of the bearing and is called secondary sliding. . The secondary sliding pair can effectively guarantee the safety and reliability of the hinge structure. The coefficient of friction between the inner ring of the bearing and the surface of the bolt is crucial for the calculation of the secondary slip of the hinge mechanism with bearings. However, t...
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 朱江冯成慧王丽平
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA