Method and device for controlling accurate ratio of various gas atmospheres of frictional wear testing machine

Abstract

The invention discloses a method for controlling an accurate ratio of various gas atmospheres, which is used for a high-temperature gas atmosphere frictional wear testing machine, and a device thereof. The device consists of a plurality of gas input branches, a gas atmosphere mixing box, a test environmental gas chamber device, a temperature control device and a cooling system; the pressures of aplurality of gas sources are reduced to a given pressure by a pressure reducing valve; the flow ratio of all gas atmospheres is controlled by the mass flow controller; the mixed gas atmosphere is sentto the ambient temperature gas chamber needed in the test by a gas channel; and in a semi-closed environmental gas chamber, the sliding frictional wear test of a ball / disk or pin / disc in the high-temperature gas atmosphere environment is performed by relatively turning dual faces. The method realizes the accurate control of the ratio of various gas atmospheres and the ambient temperature and meets the gas supply requirements for the continuous frictional wear tests; and the device has a simple structure and can be safely and reliably operated, so that the aims of accurately controlling the ratio of various gas atmospheres and realizing low cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of friction and wear testing machines, and mainly relates to a method and device for precise proportion control of multiple atmospheres used in high-temperature atmosphere friction and wear testing machines. Background technique [0002] Precise proportional control of multiple atmospheres is a key technology in the field of environmental testing. With the increasing application of multi-atmosphere mixing test environments, the requirements for the precise mixing of two or more atmospheres are getting higher and higher. The existing gas ratio mixing equipment has been used in the fields of food modified atmosphere fresh-keeping gas, metal smelting protective gas, gas shielded welding gas, gas flame cutting gas, gas phase reaction and medicine, and has created huge economic and social benefits for the society. . There are two main methods of gas proportional mixing: one is the flow method, which uses a flow...

AI Technical Summary

Problems solved by technology

Accurate control of the atmosphere ratio, correct test operation method and temperature control accuracy will affect the closeness between the high-temperature friction and wear test environment and the actual working environment, thereby affecting the accuracy of the friction and wear law of the friction pair under the simulated working condition, and then lead to wrong judgment

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