Hip joint prosthesis friction wear testing machine capable of measuring temperature in real time

Abstract

The invention relates to a hip joint prosthesis friction wear testing machine capable of measuring the temperature in real time. The hip joint prosthesis friction wear testing machine comprises a base, a controller and an experiment box body, the controller and the experiment box body are installed on the base, a cavity body is arranged at the lower half part of the experiment box body, a servo electric cylinder is installed in the cavity body, an output shaft of the servo electric cylinder penetrates through a through hole of a top plate of the cavity body and is fixedly connected with the bottom end of a coupler I arranged at the upper half part of the experiment box body, the top end of the coupler I is fixedly connected with a mounting base, a joint heat test piece is welded at the topend of the mounting base, an acetabulum test piece matched with the joint head test piece is arranged on the joint head test piece, the top end of the acetabulum test piece is connected with an output shaft of an oscillating cylinder fixed at the top plate of the experiment box body through a coupler II, a back plate at the upper half part of the experiment box body is provided with a temperaturemeasurement probe mounting plate, and an infrared temperature measurement probe is mounted on the temperature measurement probe mounting plate. A thermocouple sensor and an infrared temperature measurement instrument are adopted to acquire the temperature data in the friction wear test process of the joint head test piece and the acetabulum test piece in real time, and the data support is provided for the analysis of the friction heat-induced failure of the hip joint prosthesis.

Description

technical field [0001] The invention belongs to the technical field of medical machinery and equipment, and in particular relates to a hip joint prosthesis friction and wear testing machine for real-time temperature measurement. Background technique [0002] After the artificial hip joint prosthesis is implanted in the human body, the interface between the joint head and the acetabulum will inevitably generate frictional heat due to relative motion during service, and the accumulation of a large amount of frictional heat will further aggravate the wear of the interface, and the heat diffusion process will also The temperature of the synovial fluid and biological tissues around the prosthesis will increase, which will have a bad impact on the service life of the prosthesis. Studies have shown that the wear resistance of joint prosthesis and the activity of various bone cells are closely related to temperature. How to obtain the temperature field distribution of the prosthesis...

AI Technical Summary

Problems solved by technology

[0002] After the artificial hip joint prosthesis is implanted in the human body, the interface between the joint head and the acetabulum will inevitably generate frictional heat due to relative motion during service, and the accumulation of a large amount of frictional heat will further aggravate the wear of the interface, and the heat diffusion process will also The temperature of the synovial fluid and biological tissue around the prosthesis will increase, which will have a bad impact on the service life of the prosthesis

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