CN-121994632-A - Double-shaft friction wear testing machine with unbalanced load torque loading function

CN121994632ACN 121994632 ACN121994632 ACN 121994632ACN-121994632-A

Abstract

The invention discloses a double-shaft friction and wear testing machine with a unbalanced load torque loading function, relates to the technical field of friction and wear testing, and particularly relates to a double-shaft friction and wear testing machine with a unbalanced load torque loading function. The unbalanced load torque loading mechanism provided by the invention can meet the test requirement of friction and wear on actual loading under some special situations. Besides the test of relative rolling friction and wear under the common uniform loading condition, the non-uniform load applied to the friction pair of the two cylinders which relatively roll can be realized under the condition that the test bed is not disassembled and replaced, and the friction and wear test of vertical non-uniform loading is realized.

Inventors

SU YAN
XU YICHUN
SHEN BO
Xiong Zhenye
LI XIAOPING

Assignees

吉林大学

Dates

Publication Date: 20260508
Application Date: 20260317

Claims (4)

1. The double-shaft friction wear testing machine with the unbalanced load torque loading function is characterized by comprising a testing platform, a test accompanying piece (51) and a testing piece (71), wherein a sample rotating mechanism, a vertical pressure loading mechanism, an unbalanced load torque loading mechanism, a test supporting device and the testing platform are arranged on the testing platform, the sample rotating mechanism comprises a test accompanying piece driving shaft driving motor (2), a torque sensor (3), a test accompanying piece shaft (5), a testing piece driven motor (18), an elastic coupling (17) and the testing piece shaft (7), the vertical pressure loading mechanism comprises a vertical loading weight (24), a vertical loading weight tray (23), a vertical loading guide column (20), a vertical pressure weight loading cross beam (11), a testing piece total loading guide column (22), a vertical loading pressure sensor (10), a vertical coupling unbalanced load force transmission plate (12) and a square bearing seat (26), the unbalanced load torque loading mechanism comprises an unbalanced load lifting hook (19), a deflection lever plate spring (16), an unbalanced load pressure sensor (9), an unbalanced load force transmission cross beam (14) and an unbalanced load limiting cross beam (15), a central shaft (15), and the supporting device comprises a test supporting seat (4), a test supporting piece (6) and a test supporting seat (1) and a test supporting the test supporting piece And the guide post shaft sleeve (25).
2. A biaxial frictional wear testing machine with a unbalanced load torque loading function according to claim 1, characterized in that the shaft of the test piece driving shaft driving motor (2) is connected with one end of the torque sensor (3), the other end of the torque sensor (3) is connected with the test piece (5), the test piece shaft (5) is mounted on the test piece lower supporting seat (4), the test piece (51) is mounted on the test piece shaft (5), the mounting position of the test piece (51) is positioned at the center position of two bearings of the test piece lower supporting seat (4), the test piece driven motor (18) is connected with the elastic coupling (17), the elastic coupling (17) is connected with the test piece shaft (7), the test piece (71) is mounted on the test piece shaft (7) and is positioned at the middle position of the two test piece supporting bearings (6), and the test piece (51) is radially contacted with the test piece (71) and aligned with the center line.
3. A biaxial friction wear testing machine with offset torque loading function according to claim 1, characterized in that the vertical loading weight (24) is placed on the vertical loading weight tray (23), the vertical loading is loaded on the vertical pressure weight stressing cross beam (11) through the vertical loading guide post (20), then the vertical loading is transferred to the vertical coupling offset load transfer plate (12) through the vertical loading pressure sensor (10), the two square bearing seats (26) are installed below the vertical coupling offset load transfer plate (12), the offset load central shaft (15) is installed on the two square bearing seats (26) through bearings, the vertical loading is transferred to the two ends of the offset load central shaft (15) through the two square bearing seats (26), the offset load central shaft (15) is connected to the test piece upper supporting seat (8) through bolts, the test piece supporting bearing (6) is installed below the test piece upper supporting seat (8), the test piece shaft (7) is installed in the test piece supporting bearing (6), the axis of the offset load central shaft (15) is perpendicular to the axis of the test piece shaft (7), the vertical loading is finally transferred to the two test piece supporting seats (7) through the two square bearing seats (8) and the test piece supporting seat (71).
4. The double-shaft friction and wear testing machine with the function of unbalanced load torque loading according to claim 1, wherein a deflection lever plate (16) is arranged at one end of an unbalanced load central shaft (15), the center of mass of the deflection lever plate (16) is concentric with the unbalanced load central shaft (15), an unbalanced load lifting hook weight (19) is arranged at one end of the deflection lever plate (16) needing to deflect downwards through a mounting hole on the deflection lever plate (16), an unbalanced load pressure sensor (9) is arranged on a vertical coupling unbalanced load force transmission plate (12), the lower end of the unbalanced load pressure sensor (9) extends out of the vertical coupling unbalanced load force transmission plate (12) and is contacted with supporting ends of two unbalanced load force transmission plate springs (13), the two unbalanced load force transmission plate springs (13) and an unbalanced load limiting beam (14) are arranged on the unbalanced load central shaft (15) through bolts, and the unbalanced load limiting beam (14) and the vertical coupling unbalanced load force transmission plate (12) are kept at a distance which is the maximum displacement generated by the supporting ends of the unbalanced load force transmission plate (13) when bearing a set maximum unbalanced load.

Description

Double-shaft friction wear testing machine with unbalanced load torque loading function Technical Field The invention relates to the technical field of friction and wear tests, in particular to a double-shaft friction and wear testing machine with a unbalanced load torque loading function. Background Friction is a common and unavoidable phenomenon in industrial production, and causes abrasion in the operation process of mechanical equipment, influences the precision of the equipment, even reduces the service life of the mechanical equipment, and the friction and abrasion testing machine is equipment for testing the tribological properties of materials under different working conditions. By simulating various actual working environments such as use environments, lubrication states, driving modes and the like and applying different loads and relative motions, the friction force, the abrasion loss and the possible thermal effect between the surfaces of the materials are evaluated, and a theoretical basis is provided for the subsequent reduction of friction loss. In engineering, it is very common for two relatively rotating cylindrical friction pairs to have a relative rotational motion, and when there is a vertical load in the radial direction of the cylinders, if the axes of the two cylinders are parallel, the loading forces at the ends of the cylinders are the same. However, in practical application, due to parallelism error of two shafts or specificity of loading mode, a situation that one end of the axial cylinder is stressed greatly and the other end of the axial cylinder is stressed little occurs, and uneven radial loading occurs, so that an additional bending moment perpendicular to the axis is generated. At present, the traditional friction testing machine has single function in design and function, can only realize the relative rolling of two cylinders, applies a friction and wear test of radial vertical uniform loading, cannot simulate the condition of uneven loading in the axial direction, and cannot completely meet the test requirement of friction and wear in actual loading under some special situations. Meanwhile, the testing machine provided by the invention also has the protection function of overturning prevention of the bending moment loading limit value. Disclosure of Invention Based on the problems in the background art, the invention provides a double-shaft friction testing machine with a unbalanced load torque loading function, and the loading mechanism of the testing machine can apply vertically uniform load on a cylindrical test piece in the radial direction and apply deflection load on the axial direction of the vertical test piece. The realization mode is that two servo motors are used for driving a cylindrical accompanying test piece and a testing piece through a coupler respectively, and the two servo motors can make contact to do relative rotation movement. The weight loading mechanism is installed at the lower part of the testing machine platform, vertical loads are loaded onto the mounting support of the testing piece through the guide posts, the vertical loads are loaded onto the cylindrical testing piece through the two ends of the support, uniform vertical loads are generated, and friction force is formed. When the unbalanced load test is needed, on the basis of vertical load loading, a weight is loaded at one end of the deflection lever plate by utilizing an unbalanced load torque loading mechanism, torque is generated at the mass center position of the deflection lever plate and acts on an unbalanced load central shaft, and the torque generated by the unbalanced load central shaft acts on two ends of the test piece support through two unbalanced load force transmission plate springs, so that uneven load with large end force and small end force is generated in the axial direction of the cylindrical test piece and is contacted with the accompanying test piece. The loading simulation of a certain included angle formed by non-parallel central lines of two cylinders is realized. A certain interval is reserved between an offset load limiting beam arranged on an offset load central shaft and a vertical coupling offset load force transmission plate, and the interval is the maximum deformation amount of the offset load force transmission plate spring, so that the deformation degree of the offset load force transmission plate spring is limited, the deformation amount is controlled, and the offset load torque loading mechanism is prevented from overturning due to the fact that the weight loaded by the offset lever plate is overweight. The beneficial effects are that: 1. The invention meets the requirement of testing the unbalanced load torque loading friction pair, does not need to disassemble, assemble and replace a test bed, can change the unbalanced load bending moment of the friction pair by hanging weights with different weights on the deflection lever plate, and is convenient for