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CN-116840089-B - Ultra-high temperature friction and wear testing device and method under prestress condition

CN116840089BCN 116840089 BCN116840089 BCN 116840089BCN-116840089-B

Abstract

The invention relates to an ultra-high temperature friction and wear testing device and method under a prestress condition, and belongs to the field of material testing. The positive pressure loading module applies positive pressure to the test piece, the temperature loading module is heated by an electromagnetic induction coil, the reciprocating motion module controls reciprocating motion through two symmetrically placed electric cylinders, and the one-dimensional force sensor is used for measuring prestress and realizing reciprocating motion under force retention. The supporting force loading module is used for counteracting the fact that the positive pressure is not constant in the friction experiment process due to the fact that the bending is generated under the positive pressure. The positive pressure loading module and the supporting force loading module penetrate through the vacuum water-cooling atmosphere cavity from the upper side and the lower side and keep neutral, and the reciprocating motion module penetrates through the vacuum water-cooling atmosphere cavity from the left side and the right side and keeps neutral. The numerical value of positive pressure and friction force can be accurately measured, so that the friction coefficient is calculated, the temperature loading efficiency is improved, the bending deformation of a test piece is reduced, the reliability and stability of experimental data are improved, and the experimental safety is quite high.

Inventors

  • LIU XIN
  • ZHANG JING
  • ZHANG JIANHAI
  • SUI PENG
  • FAN YINGYING
  • DING YANG
  • SUN BINGHUA

Assignees

  • 吉林大学

Dates

Publication Date
20260508
Application Date
20230707

Claims (8)

  1. 1. The ultra-high temperature friction and wear testing device under the prestress condition is characterized by comprising a positive pressure loading module (1), a temperature loading module (2), a reciprocating motion module (3), a supporting force loading module (4), a storage table (5), a whole machine support frame (6) and a vacuum water-cooling atmosphere cavity (7), wherein the positive pressure loading module (1) and the supporting force loading module (4) penetrate through the vacuum water-cooling atmosphere cavity (7) from the upper side and the lower side and keep neutral, the reciprocating motion module (3) penetrates through the vacuum water-cooling atmosphere cavity (7) from the left side and the right side and keeps neutral, an electromagnetic induction coil (202) in the temperature loading module (2) is fixed on a cavity rear wall (708) of the vacuum water-cooling atmosphere cavity (7) through an electromagnetic induction coil connecting port (705), the vacuum water-cooling atmosphere cavity (7) is fixedly connected with the whole machine support frame, the whole machine support frame (6) is arranged on the storage table (5), a positive pressure is applied to a plate-shaped test piece (201) of the positive pressure loading module (1) and simultaneously measures the positive pressure and friction force in cooperation with a three-dimensional force sensor, the electromagnetic induction coil (202) is arranged on the upper side and lower side of the electromagnetic induction coil (202), the reciprocating motion module (3) controls reciprocating motion through two symmetrically placed electric cylinders, and is provided with a one-dimensional force sensor I respectively so as to measure prestress and realize reciprocating motion under force retention; The supporting force loading module (4) is characterized in that an electric cylinder through III (401) is fixedly connected with a supporting frame (6) through a trapezoid, an electric cylinder output shaft III (402) is fixedly connected with a connecting rod III (403), the other end of the connecting rod III (403) is connected with a centering cylinder III (404), the centering cylinder III (404) is arranged between two large centering V-shaped blocks (607) and used for guaranteeing centering between a positive pressure loading module (1) and the supporting force loading module (4), the centering cylinder III (404) is fixedly connected with a push-pull rod III (405), the other end of the push-pull rod III (405) is in threaded connection with a rotating allocation shaft III (414), the other end of the push-pull rod III (405) is connected with a one-dimensional force sensor II (407) through a flange, an optical axis between a threaded end and the flange is used for installing a locking ring III (406), an angle of the second radiation protection type test piece II (409) is adjusted to be parallel to a platy test piece (201) when the threads are screwed, then the axial distance is adjusted through a pair of locking rings III (406) to be fastened, the other end of the one-dimensional force sensor II (407) is connected with a water-cooled connecting rod II (408), the other end of the water-cooled clamp ball (412) is connected with a lower concrete clamp ball (408) through the water-cooled clamp protection ball (408), the water-cooling connecting rod II (408) and the radiation-proof heat insulation board II (409) are provided with threaded holes, the lower ball test piece clamp body (412) is provided with threads, the other end of the lower ball test piece clamp body (412) is provided with a spherical groove, the lower ball test piece clamp cover body (410) is provided with an arc, the lower ball test piece clamp cover body (410) and the lower ball test piece clamp body (412) are clamped through screws, the diameter of the lower ball test piece (411) is smaller than that of the spherical groove, so that the lower ball test piece (411) freely rolls in the moving process, and friction and abrasion between the lower ball test piece (411) and the platy test piece (201) are reduced.
  2. 2. The ultra-high temperature frictional wear testing device under the prestress condition of claim 1, wherein the positive pressure loading module (1) is characterized in that an electric cylinder I (101) is fixed on a whole machine support frame (6), an electric cylinder output shaft I (102) is fixedly connected with a connecting rod I (103), the other end of the connecting rod I (103) is connected with a centering cylinder I (104), the centering cylinder I (104) is arranged between two large centering V-shaped blocks (607) to ensure centering between the positive pressure loading module (1) and a supporting force loading module (4), the centering cylinder I (104) is fixedly connected with a push-pull rod I (105), the other end of the push-pull rod I (105) is in threaded connection with a rotary allocation shaft I (114), the other end of the rotary allocation shaft I (114) is connected with a three-dimensional force sensor (107) through a flange, an optical axis mounting locking ring I (106) between the threaded end of the rotary allocation shaft I (114) and the flange is well adjusted to be parallel with a plate-shaped test piece (201) when the threaded heat insulation plate is screwed, then the axial locking distance is adjusted through a pair of rings I (106), the other end of the rotary allocation shaft I (114) is tightly connected with the connecting rod I (108) through a pair of axial locking rings (108) on a concrete clamp ball (112), a radiation-proof heat insulation plate I (109) is clamped between the water-cooling connecting rod I (108) and the upper ball test piece clamp body (112).
  3. 3. The ultra-high temperature friction and wear testing device under the prestress condition according to claim 2, wherein the water-cooling connecting rod I (108) and the radiation-proof heat insulation plate I (109) are provided with threaded holes, the upper ball test piece clamp body (112) is provided with threads, the other end of the upper ball test piece clamp body (112) is provided with a spherical groove which is attached to the upper ball test piece (111), a pin is processed at the bottom of the groove, the upper ball test piece (111) is provided with a blind hole which is matched with the pin to prevent the upper ball test piece (111) from rolling in the running process, the upper ball test piece clamp cover body (110) is provided with an arc which is attached to the upper ball test piece (111), the upper ball test piece clamp cover body (110) is connected with the upper ball test piece clamp body (112) through screws, and when the upper ball test piece clamp cover body (110), the upper ball test piece (111) and the upper ball test piece clamp body (112) are attached to each other, a gap of 1mm is formed between the end face of the upper ball test piece clamp body (112) and the end face of the upper ball test piece clamp body (111) so as to reduce the gap by tightening the screws.
  4. 4. The ultra-high temperature frictional wear testing device under the prestress condition according to claim 1, wherein the temperature loading module (2) comprises an electromagnetic induction heating power supply, an electromagnetic induction coil (202) and a plate-shaped test piece (201), wherein the electromagnetic induction coil (202) is elliptical, the plate-shaped test piece (201) is arranged at the center position between two turns of the electromagnetic induction coils (202), clamping is performed through a plate-shaped test piece clamp body (309) and a plate-shaped test piece clamp cover body (308), the electromagnetic induction coil (202) is fixed through an induction coil connecting port (705) reserved on the rear wall of the vacuum water-cooling atmosphere cavity (7) and is connected with the electromagnetic induction heating power supply, and the electromagnetic induction heating power supply is arranged on a protruding plane (501) of the object placing table (5).
  5. 5. The ultra-high temperature friction and wear testing device under the prestress condition according to claim 1, wherein the reciprocating movement module (3) is characterized in that an electric cylinder II (301) is fixed on a whole machine support frame (6), an electric cylinder output shaft II (302) is fixedly connected with a connecting rod II (303), the other end of the connecting rod II (303) is connected with a centering cylinder II (304), the centering cylinder II (304) is arranged between two large centering V-shaped blocks (607) to ensure centering between the two electric cylinder output shafts II (302) in the reciprocating movement module (3), the centering cylinder II (304) is fixedly connected with a push-pull rod II (305), the other end of the push-pull rod II (305) is in threaded connection with a rotary distribution shaft II (310), an optical axis of the rotary distribution shaft II (310) is provided with a shaft shoulder for installing a locking ring II (311), a clamp of two plate-shaped test piece is kept horizontal when the screw threads are screwed, the axial distance is adjusted through a pair of locking rings II (311), external screw threads are processed on the other side of the shaft shoulder, the other side of the shaft shoulder is used for connecting a one-dimensional force sensor I (306), and the other end of the one-dimensional plate-shaped clamp (306) is connected to a specific clamp body (309) and a test piece body (309) is clamped on the test piece (309) by a specific clamp body) to a test piece (201).
  6. 6. The ultra-high temperature friction and wear testing device under the prestress condition according to claim 1, wherein the object placing table (5) is of a convex structure, and a groove is formed in the lower portion of the object placing table.
  7. 7. The ultra-high temperature friction and wear testing device under the prestress condition according to claim 1 is characterized in that a square shell (603) is a whole machine support frame main body, four trapezoid fixing supports (601) are connected to the whole machine support frame main body to install four electric cylinders, small centering V-shaped blocks (602) are installed on the trapezoid fixing supports to position and restrain the electric cylinders, large centering V-shaped blocks (607) are installed on the square shell (603), centering between a first output shaft (102) of the restraining electric cylinders and a third output shaft (402) of the electric cylinders and centering between two output shafts (302) of the electric cylinders in a reciprocating motion module (3), a grating ruler (604) is installed between the pair of large centering V-shaped blocks to detect displacement between each shaft, a vacuum water-cooling atmosphere cavity (7) is installed on a horizontal object placing support frame (606), the whole support frame (605) supports the whole body, the upper end is fixed with the square shell (603), and the lower end of the small centering V-shaped blocks are placed on a horizontal plane (503) of an object placing table (5).
  8. 8. The ultra-high temperature friction and wear testing device under the prestress condition according to claim 1, wherein the vacuum water-cooling atmosphere cavity (7) is characterized in that a hollow cavity shell (703) is of an internal hollow shell structure and is connected with all parts needing water cooling through a water cooling pipe (710), an atmosphere channel (707) is formed in the hollow cavity shell (703), a first electric cylinder output shaft (102), a third electric cylinder output shaft (402) and two second electric cylinder output shafts (302) in the reciprocating motion module (3) respectively penetrate through a corrugated pipe (702) and penetrate through the hollow cavity shell (703) to be sealed with the corrugated pipe (702) through a sealing ring (701), vacuum or special atmosphere cavities in an experiment cavity of the hollow cavity shell (703) are kept, a cavity bracket (706) is arranged on a horizontal object bracket (606) of a whole machine support frame (6) and used for supporting the vacuum water-cooling atmosphere cavity (7), and a screwing handle (709) is used for closing a cavity door.

Description

Ultra-high temperature friction and wear testing device and method under prestress condition Technical Field The invention relates to the field of material testing, in particular to a friction and wear performance testing method and device for a material under a special working condition, and particularly relates to an ultrahigh-temperature friction and wear testing device and method under a prestress condition. Background With the rapid development of various aspects of aerospace, weaponry, nuclear power fields and the like in China, the performance of required materials is improved continuously, and in the operation process, mutual friction exists among contact parts which move relatively, but the friction among all parts does not occur under the common environmental conditions. For example, high temperature frictional wear under pre-stress conditions of sealing components for aircraft engines, engine pistons and cylinders, nuclear power plant heat transfer tubes, and the like are all major failure modes. In order to search the service performance and damage failure mechanism of the component materials working in the special environment, thereby enhancing the service performance and service life of the component materials, the friction and wear process of the materials in the special environment needs to be simulated, and therefore, a high-temperature friction and wear test device capable of applying prestress needs to be invented. The existing high-temperature friction and wear test device generally has the problems of low temperature loading, low loading rate, uneven loading and the like, and the pin-disc type test piece is used for a lot, so that the prestressing force cannot be applied to the test piece, the service environment of most key parts is difficult to completely simulate, and the related test effect is poor. Disclosure of Invention The invention aims to provide an ultrahigh temperature frictional wear testing device and method under a prestress condition, which solve the problems of difficult ultrahigh temperature loading, too slow speed and serious supporting wear of a test piece in the prior art. The above object of the present invention is achieved by the following technical solutions: The ultra-high temperature friction and wear testing device under the prestress condition comprises a positive pressure loading module 1, a temperature loading module 2, a reciprocating motion module 3, a supporting force loading module 4, a placing table 5, a whole machine supporting frame 6 and a vacuum water-cooling atmosphere cavity 7, wherein the positive pressure loading module 1 and the supporting force loading module 4 penetrate through the vacuum water-cooling atmosphere cavity 7 from the upper side and the lower side and keep neutral, the reciprocating motion module 3 penetrates through the vacuum water-cooling cavity 7 from the left side and the right side and keeps neutral, an electromagnetic induction coil 202 in the temperature loading module 2 is fixed on a cavity rear wall 708 of the vacuum water-cooling atmosphere cavity 7 through an electromagnetic induction coil connector 705, the vacuum water-cooling atmosphere cavity 7 is placed in the center of the whole machine supporting frame 6 and fixedly connected with the whole machine supporting frame, the whole machine supporting frame 6 is placed on the placing table 5, the positive pressure loading module 1 applies positive pressure to the plate-shaped test piece 201 and simultaneously measures the positive pressure and friction force in cooperation with a three-dimensional force sensor, the temperature loading module 2 is heated by the electromagnetic induction coil 202, the electromagnetic induction coil 202 is placed on the upper side and the lower side of the plate-shaped test piece 201, eddy current is conducted on the high-frequency alternating current sample 201, the reciprocating motion module 3 is subjected to eddy current heating through the two symmetrical electric induction coils, the two reciprocating motion modules are placed, and the reciprocating motion modules are controlled to control one-dimensional force is kept constant, and the positive pressure is generated under the constant force by the reciprocating motion under the force, and the constant force is caused by the experiment effect of the reciprocating force and the constant force is kept under the constant force and the experiment conditions when the force is applied by the reciprocating force and the experiment conditions. The positive pressure loading module 1 comprises an electric cylinder I101, an electric cylinder output shaft I102, a connecting rod I103, a centering cylinder I104, a push-pull rod I105, a locking ring I106, a rotary allocating shaft I114, a three-dimensional force sensor 107, a water-cooling connecting rod I108, a radiation-proof heat insulation board I109, an upper ball test piece clamp body 112, an upper ball test piece 111 and an upper ball te