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Device for testing dynamic friction torque of precise micro rolling bearing

A rolling bearing and friction torque technology, which is applied in the field of precision miniature rolling bearing dynamic friction torque testing devices, can solve the problems of large dynamic friction torque test errors and difficulty in truly reflecting the actual dynamic friction torque.

Inactive Publication Date: 2012-11-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a test device for the dynamic friction torque of precision miniature rolling bearings, which can accurately and real-time Test the dynamic friction torque of the tested precision miniature rolling bearing

Method used

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  • Device for testing dynamic friction torque of precise micro rolling bearing
  • Device for testing dynamic friction torque of precise micro rolling bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 and figure 2 , the precision miniature rolling bearing dynamic friction torque testing device, including machine base (6), aerostatic suspension bearing seat (5), two sets of tested bearings (20), driving electric spindle (10), pressure sensor (3) and A speed sensor (8), characterized by:

[0019] 1) The two sets of tested bearings (20) are placed in the center hole of the suspension shaft (4) in the aerostatic suspension bearing seat (5), and the center holes of the two sets of tested bearings (20) are connected with a rotating Mandrel (19) is fixedly socketed;

[0020] 2) The rotating mandrel (19) is connected to drive the electric spindle (10) through a rubber hose flexible coupling (9);

[0021] 3) Install the pressure sensor (3) near the left end of the suspension shaft (4), and install the speed sensor (8) near the right end of the suspension shaft (4).

Embodiment 2

[0023] The dynamic friction torque testing device for precision miniature rolling bearings is characterized in that: the aerostatic suspension bearing seat (5) and the driving electric spindle (10) are installed on the base (6), and according to the principle of aerostatic bearings, Use compressed air to completely suspend the suspension shaft (4), and completely isolate it together with the tested bearing (20) from other surrounding external parts, so as to avoid any influence of contact on the test results.

[0024] The device for testing the dynamic friction torque of precision miniature rolling bearings is characterized in that: the test bearing ( 20) Apply axial preload.

[0025] The dynamic friction torque testing device for precision miniature rolling bearings is characterized in that a lever (1) is installed on the left end of the suspension shaft (4), and the lever (1) is pressed against the pressure sensor on the pressure sensor (3). (3), the pressure sensor (3) is ...

Embodiment 3

[0027] figure 1 As shown, the precision miniature rolling bearing dynamic friction torque test device includes: the air static pressure suspension bearing seat (5) and the driving electric spindle (10) are installed on the machine base (6), and the suspension shaft (4) It is completely suspended and connected with a rubber hose flexible coupling (9). At the same time, a lever (1) installed on the left end of the suspension shaft (4) is pressed against the pressure sensor ( 3) on.

[0028] The aerostatic suspension bearing seat (5) mentioned above, such as figure 2 As shown, it includes: the compressed air passes into the air inlet nozzle (15) installed on the casing (11), passes through the air flow channel (12), enters the air static pressure bearing (13) and suspends the suspension shaft (4), from The air outlet (21) leads to the outside world. The two sets of test bearings (21) installed in pairs are installed in the suspension shaft (4), and the width difference betwee...

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Abstract

The invention relates to a device for testing the dynamic friction torque of a precise micro rolling bearing. The device comprises a machine base, an air static pressure suspension bearing block, two sets of tested bearings, a driving electric spindle, a pressure sensor and a speed sensor, wherein the two sets of tested bearings are arranged in a central hole of a suspension shaft in the air static pressure suspension bearing block; a rotary central spindle is sleeved in the central hole of the two sets of tested bearings and is connected with the driving electric spindle through a rubber hose flexible coupling; the pressure sensor is arranged on the part close to the left end of the suspension shaft; and the speed sensor is arranged on the part close to the right end of the suspension shaft. The dynamic friction torque of the tested bearings can be tested in real time in a start process, a stop process and an operation process with different rotation speeds.

Description

technical field [0001] The invention relates to a bearing dynamic performance testing machine, in particular to a precision miniature rolling bearing dynamic friction torque testing device. Background technique [0002] Precision miniature rolling bearings are composed of outer rings, inner rings, ball rolling elements and cages. They are the supporting parts of rotating machinery in precision instruments and instruments. They are widely used in precision and sensitive instruments in high-end scientific and technological fields such as aviation, aerospace, navigation, and diving. , in the meter. There are many parameters that represent the dynamic performance and overall quality of the bearing, among which the internal friction torque of the bearing is one of the most important dynamic characteristic parameters and technical indicators. The specific reflection of the state directly affects the accuracy and overall performance of the instrument. [0003] Due to the smal...

Claims

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Application Information

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IPC IPC(8): G01L3/00G01M13/04
Inventor 李松生陈剑陈斌凌杰鲁豫鑫董玛莉
Owner SHANGHAI UNIV
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