CN-122016495-A - Active gas confining pressure triaxial apparatus for moon extreme environment simulation

CN122016495ACN 122016495 ACN122016495 ACN 122016495ACN-122016495-A

Abstract

The invention discloses an active gas confining pressure triaxial apparatus for moon extreme environment simulation, which belongs to the technical field of geomechanical testing of an extraterrestrial celestial body, and comprises a base, wherein a sample base regulation system is arranged on the top surface of the base, a sample is installed on the sample base regulation system, a sample footstock regulation system is arranged at the top of the sample, a confining pressure cabin is arranged outside the sample, an isolation cabin is arranged at the outer side of the confining pressure cabin, a loading frame is fixedly connected to the top surface of the base, a vertical loading system is arranged on the loading frame and is used for pressing the sample, a confining pressure air outlet system is arranged at the top of the confining pressure cabin, a confining pressure active regulation system is arranged at one side of the bottom of the confining pressure cabin, a confining pressure air inlet system and a vacuum air exhaust system are respectively arranged at the other side of the bottom of the confining pressure cabin, and a monitoring mechanism is arranged in the confining pressure cabin. The invention can synchronously realize the physical and mechanical property test of the simulated lunar soil under high vacuum and extreme temperature change.

Inventors

WU YANG
HUANG JIE
LI PEILIN
PAN JIALI
LI WEISHEN
LI SHUBIN
YE XIANGXING
WEN LIWEI
LIU DONGYING
WU DI
CUI JIE
LIN LUOYI

Assignees

广州大学

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The active gas confining pressure triaxial apparatus for moon extreme environment simulation is characterized by comprising a base (1), wherein a sample base regulating and controlling system (2) is arranged on the top surface of the base (1), a sample (7) is arranged on the sample base regulating and controlling system (2), a sample footstock regulating and controlling system (8) is arranged at the top of the sample (7), a confining pressure cabin (4) is arranged outside the sample (7), an isolation cabin (6) is arranged at the outer side of the confining pressure cabin (4), a loading frame (11) is fixedly connected to the top surface of the base (1), a vertical loading system (10) is arranged on the loading frame (11), the vertical loading system (10) is used for pressing the sample (7), a confining pressure air outlet system (9) is arranged at the top of the confining pressure cabin (4), a confining pressure active regulating and controlling system (3) is arranged at one side of the bottom of the confining pressure cabin (4), a confining pressure air inlet system (14) and a vacuum air exhaust system (15) are respectively arranged at the other side of the bottom of the confining pressure cabin (4), and a monitoring mechanism is arranged in the confining pressure cabin (4).
2. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the sample base regulation and control system (2) comprises a sample (7) base fixedly connected to the top surface of the base (1), a refrigerating element (202) is arranged on the top surface of the sample (7) base, a first oxygen-free copper (201) is arranged on the top surface of the refrigerating element (202), the sample (7) is arranged on the top surface of the first oxygen-free copper (201), a water cooler (204) is arranged in the base (1), a plurality of water cooling pipes (203) are communicated with the water cooler (204), and the water cooling pipes (203) are located below the refrigerating element (202).
3. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 2, wherein the water cooling pipe (203) is internally provided with a circumferential 360-degree needle-like turbulence column.
4. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the sample top seat regulating and controlling system (8) comprises a second oxygen-free copper (801) contacted with the top surface of the sample (7), a heating plate (802) is arranged on the top surface of the second oxygen-free copper (801), an aluminum nitride ceramic (803) is arranged on the top surface of the heating plate (802), and the top of the aluminum nitride ceramic (803) is abutted with the vertical loading system (10).
5. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the confining pressure air outlet system (9) comprises a convex arc-shaped diversion air outlet device (901) communicated with the top surface of the confining pressure cabin (4), a first valve (902) and an oxygen sensor (903) are respectively arranged at the top of the convex arc-shaped diversion air outlet device (901), and the oxygen sensor (903) is located above the first valve (902).
6. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the confining pressure air inlet system (14) comprises a concave arc-shaped diversion air outlet device (1401) communicated with the bottom of the confining chamber (4), the concave arc-shaped diversion air outlet device (1401) is communicated with a first air pipe (1404), the first air pipe (1404) is communicated with an inert gas loading controller (17), a second valve (1402) and a gas flowmeter (1403) are respectively arranged on the first air pipe (1404), and the gas flowmeter (1403) is located on one side, close to the concave arc-shaped diversion air outlet device (1401), of the first air pipe (1404).
7. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the vacuum pumping system (15) comprises a second gas pipe (1504), the second gas pipe (1504) is respectively communicated with a confining pressure cabin connecting pipe communicated with a confining pressure cabin (4) and an insulating cabin connecting pipe communicated with the insulating cabin (6), the confining pressure cabin (4) connecting pipe is communicated with the sample (7), a sample vacuum valve (1501) is arranged on the confining pressure cabin (4) connecting pipe, an insulating cabin valve (1502) is arranged on the insulating cabin connecting pipe, a vacuum gauge (1503) is arranged on the second gas pipe (1504), and the second gas pipe (1504) is communicated with a vacuum controller (16).
8. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein the confining pressure active regulation and control system (3) comprises a metal corrugated pipe (301) communicated with the inside of the confining chamber (4), a metal limiting pipe (302) is arranged on the outer side of the metal corrugated pipe (301), an insulating layer (303) is arranged on the outer side of the metal limiting pipe (302), and an actuator (304) is connected to one side, away from the confining chamber (4), of the metal corrugated pipe (301) in a transmission manner.
9. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, characterized in that the monitoring mechanism comprises a pressure sensor (5) and a temperature sensor (13) respectively arranged at both sides of the sample base regulation and control system (2).
10. The active gas confining pressure triaxial apparatus for lunar extreme environment simulation according to claim 1, wherein an annular heating wire (12) is arranged outside the sample base regulating and controlling system (2).

Description

Active gas confining pressure triaxial apparatus for moon extreme environment simulation Technical Field The invention belongs to the technical field of geomechanical testing of extraterrestrial celestial bodies, and particularly relates to an active gas confining pressure triaxial apparatus for moon extreme environment simulation. Background With the advancement of lunar exploration plans of various countries, lunar base construction and resource development and utilization have become important development directions in the aerospace field. The mechanical properties of lunar surface geologic materials directly affect lunar lander stability, base construction safety and resource exploitation feasibility. At present, research on geomechanical characteristics of moon mainly depends on remote sensing detection and limited lunar soil sample analysis, and systematic in-situ test data is lacking. Special environmental conditions on the lunar surface, including high vacuum, extreme temperature changes, etc., have a significant impact on the mechanical behavior of geological materials, while test results in the earth's environment are difficult to apply directly to lunar engineering practice. The existing geomechanical testing equipment is designed mainly aiming at the earth environment, and cannot accurately simulate the special lunar environment. Although the traditional triaxial apparatus can test the mechanical properties of the soil body under the complex stress state, the triaxial apparatus has the following limitations that the high vacuum environment of the moon cannot be simulated, and the extreme temperature change and the cyclic simulation of the surface of the moon are difficult to realize. The day and night temperature difference of the lunar surface is extremely large, the daytime temperature can reach 110-140 ℃, and the night temperature can be reduced to minus 180-minus 130 ℃. In addition, the traditional triaxial apparatus mostly uses water or oil as confining pressure medium, and under the extreme temperature difference of moon, the liquid can freeze and expand to cause structural damage or violent gasification to cause the confining pressure to be out of control. The liquid medium has large heat capacity, high temperature control energy consumption and low speed, and is difficult to realize accurate temperature circulation. The existing equipment lacks an effective heat insulation design, and cannot establish a stable extreme temperature environment. The traditional equipment can not simulate the stress state of moon under high vacuum and large temperature difference at the same time, and cannot perform a real thermal-force coupling test. Disclosure of Invention The invention aims to provide an active gas confining pressure triaxial apparatus for lunar extreme environment simulation, so as to solve the problems of the prior art. The invention provides an active gas confining pressure triaxial apparatus for lunar extreme environment simulation, which comprises a base, wherein a sample base regulation system is arranged on the top surface of the base, a sample is arranged on the sample base regulation system, a sample footstock regulation system is arranged on the top of the sample, a confining pressure cabin is arranged outside the sample, an isolated cabin is arranged on the outer side of the confining pressure cabin, a loading frame is fixedly connected to the top surface of the base, a vertical loading system is arranged on the loading frame and is used for pressing the sample, a confining pressure air outlet system is arranged on the top of the confining pressure cabin, a confining pressure active regulation system is arranged on one side of the bottom of the confining pressure cabin, a confining pressure air inlet system and a vacuum air exhaust system are respectively arranged on the other side of the bottom of the confining pressure cabin, and a monitoring mechanism is arranged in the confining pressure cabin. Optionally, the sample base regulation and control system is in including the rigid coupling sample base of base top surface, the top surface of sample base is equipped with refrigeration component, refrigeration component's top surface is equipped with first oxygen-free copper, first oxygen-free copper's top surface is equipped with the sample, be equipped with the water-cooling machine in the base, the water-cooling machine intercommunication has a plurality of water-cooling pipes, the water-cooling pipe is located refrigeration component's below. Optionally, a circumferential 360-degree needle-shaped turbulent flow column is arranged in the water cooling pipe. Optionally, the sample footstock regulation and control system include with the second oxygen-free copper of sample top surface contact, the top surface of second oxygen-free copper is equipped with the heating plate, the top surface of heating plate is equipped with aluminium nitride pottery, aluminium nitride pottery's top