CN-224202876-U - Coining V-shaped block and frictional wear testing machine

CN224202876UCN 224202876 UCN224202876 UCN 224202876UCN-224202876-U

Abstract

The invention provides a coining V-shaped block and a friction and wear testing machine, wherein the coining V-shaped block is used for being installed on the friction and wear testing machine and is matched with a testing pin shaft of the friction and wear testing machine, one end part of the coining V-shaped block in a first direction is a friction end part, the end surface of the friction end part is provided with a V-shaped groove, the V-shaped groove penetrates through the coining V-shaped block along a second direction perpendicular to the first direction, two sides of the friction end part in the second direction are respectively provided with a notch, and two ends of the V-shaped groove in the second direction are respectively connected with two notches. Through above-mentioned structural design, the groove wall area of V type groove is reduced to the breach is utilized in this disclosure, reduces the effective area of contact of coining V type piece via V type groove and test round pin axle promptly to make the coining V type piece can be suitable for realizing higher test limit, be favorable to friction wear testing machine to overcome the limitation problem of self evaluation extreme pressure performance.

Inventors

Rui Wenqi
LIANG YUXIANG
XIE XIN
HAO LICHUN
ZHAO MENGYA

Assignees

中国石油化工股份有限公司
中石化石油化工科学研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20250427

Claims (10)

1. The V-shaped block is arranged on a friction and wear testing machine and is matched with a testing pin shaft of the friction and wear testing machine, one end of the V-shaped block in the first direction is a friction end, the end face of the friction end is provided with a V-shaped groove, the V-shaped groove penetrates through the V-shaped block in the second direction perpendicular to the first direction, and the V-shaped block is characterized in that notches are respectively arranged on two sides of the friction end in the second direction, and two notches are respectively connected with two ends of the V-shaped groove in the second direction.
2. The coined V block according to claim 1, wherein the orthographic projection pattern of the notch is triangular on a reference plane parallel to the first direction and parallel to the second direction such that both side surfaces of the friction end portion in the second direction are inclined surfaces, respectively.
3. The coined V block according to claim 2, wherein the angle between the bevel and the first direction is 15 ° to 60 °.
4. The coined V block according to claim 2 wherein the walls of the V groove are trapezoidal.
5. The coined V block according to claim 4 wherein a ratio of a length of a top edge of the groove wall to a length of the coined V block in the second direction is 0.2-0.8.
6. The coined V block according to claim 1 wherein in the first direction, an end of the notch remote from the end face is remote from the end face than a bottom of the V groove.
7. The coined V block according to claim 6 wherein a ratio of a depth of the V groove to a height of the notch is 0.2-0.8 in the first direction.
8. The coined V block according to claim 1, wherein the coined V block is cylindrical and the first direction is a direction parallel to an axis of the cylindrical.
9. The coined V block according to claim 1, wherein an angle between two groove walls of the V groove is 96 ° ± 1 °.
10. The friction and wear testing machine is characterized by comprising a friction assembly, wherein the friction assembly comprises a testing pin shaft and two V-shaped refined blocks according to any one of claims 1-9, the V-shaped groove openings of the two V-shaped refined blocks are oppositely arranged, and the testing pin shaft is positioned between the two V-shaped grooves and respectively contacts the four groove walls of the two V-shaped grooves.

Description

Coining V-shaped block and frictional wear testing machine Technical Field The disclosure relates to the technical field of lubricating material performance testing equipment, in particular to a coining V-shaped block and a friction and wear testing machine. Background The gear mechanism is one of main mechanical transmission devices, has the characteristics of large transmission power range, high transmission efficiency and the like, and can be widely applied to various industries such as aeroengines, robot RV speed reducers, wind power generation systems, high-speed rail gear boxes and the like. With advances in gear manufacturing technology and diversification of application conditions, gear transmission devices are gradually evolving toward high power, miniaturization. The gear ratio and the tooth surface contact stress of the gear in the field of manufacturing high-end equipment are large, the contact state of the tooth surface and the load can be changed discontinuously at any time in the motion, the local temperature between the tooth surfaces is ultrahigh, and the partial temperature can be even up to hundreds of degrees in some occasions. However, the equipment in the high-end manufacturing industry is often under extremely severe working conditions such as heavy load, high temperature and the like, and the application conditions all put higher performance requirements on the oil products for lubricating the gears, in particular to the extreme pressure performance. The extreme pressure performance is one of important technical indexes in the performance evaluation of the lubricating material, and currently, the extreme pressure performance of the lubricating material is commonly evaluated by adopting a Timken (Timken) testing machine, a four-ball testing machine, a Falex friction and wear testing machine, an FZG gear testing machine and other methods. The research shows that the action modes of the Falex frictional wear testing machine and the FZG gear testing machine are relatively close, so that the Falex frictional wear testing machine and the FZG gear testing machine have relatively strong correspondence to the evaluation result of extreme pressure performance. According to the test method described in the American test and material standard ASTM D3233 and the Chinese petrochemical industry standard SH/T0187-92, the extreme pressure performance of the lubricating material is evaluated by a Falex tester, the maximum load of the lubricating material can only reach 4500lbf (20000N), and the extreme pressure performance of the high-load lubricating material cannot be evaluated and distinguished under severe conditions when the maximum load exceeds the upper test evaluation limit and is expressed as >4500 lbf. The FZG gear testing machine is used for evaluating the extreme pressure performance of the lubricating material, 4L of the lubricating material is required to be consumed in one experiment, the maximum failure load is only 12 levels, the maximum failure load exceeds the upper limit of test evaluation, the maximum failure load is represented by 12 levels, the test cost is high, and the extreme pressure performance evaluation cost is high. The 2021 China civil aviation bureau proposes a high-speed FZG gear method for evaluating the bearing capacity of lubricating materials of aviation turbine engines, and the load level can reach 16 levels, but the oil consumption of one test is up to 20.5L, and the test cost is high. Therefore, developing a method for extreme pressure performance with low fuel consumption, low test cost and high test limit has become an important link for developing high-performance lubricating materials under extremely severe working conditions. Disclosure of utility model It is a primary object of the present disclosure to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a coined V-block that enables higher test limits. In order to achieve the above purpose, the present disclosure adopts the following technical scheme: According to one aspect of the disclosure, a coining V-shaped block is provided and is used for being installed on a friction and wear testing machine and matched with a testing pin shaft of the friction and wear testing machine, one end of the coining V-shaped block in a first direction is a friction end, the end face of the friction end is provided with a V-shaped groove, the V-shaped groove penetrates through the coining V-shaped block along a second direction perpendicular to the first direction, two sides of the friction end in the second direction are respectively provided with a notch, and two ends of the V-shaped groove in the second direction are respectively connected with two notches. According to one embodiment of the present disclosure, on a reference plane parallel to the first direction and parallel to the second direction, the orthographic projection pattern of the notch is triangular, so that two side sur