30results about How to "Comprehensive performance evaluation" patented technology

The invention provides a mud cake performance comprehensive evaluation method, which comprises the following steps: (1) placing a loaded mud cake and an unloaded mud cake on a rotating tray; (2) applying a pressure onto the loaded mud cake, and recording the thickness and quality of the loaded mud cake and the unloaded mud cake respectively; (3) starting a linked rotating tray, and increasing therotation speed gradually; (4) recording an unloaded throwing rotation speed; (5) increasing the rotation speed till the loaded mud cake is thrown out from the tray, stopping the rotating tray, and recoding a loaded throwing rotation speed; and (6) evaluating the performance of the mud to be tested comprehensively according to the thickness and quality of the loaded mud cake and the unloaded mud cake, the unloaded throwing rotation speed, the loaded throwing rotation speed and set parameters. The method of the invention is simple, effective and highly maneuverable. In addition, the invention also provides a mud cake performance comprehensive evaluation device using the method.

The invention provides a mud cake performance comprehensive evaluation method, which comprises the following steps: (1) placing a loaded mud cake and an unloaded mud cake on a rotating tray; (2) applying a pressure onto the loaded mud cake, and recording the thickness and quality of the loaded mud cake and the unloaded mud cake respectively; (3) starting a linked rotating tray, and increasing therotation speed gradually; (4) recording an unloaded throwing rotation speed; (5) increasing the rotation speed till the loaded mud cake is thrown out from the tray, stopping the rotating tray, and recoding a loaded throwing rotation speed; and (6) evaluating the performance of the mud to be tested comprehensively according to the thickness and quality of the loaded mud cake and the unloaded mud cake, the unloaded throwing rotation speed, the loaded throwing rotation speed and set parameters. The method of the invention is simple, effective and highly maneuverable. In addition, the invention also provides a mud cake performance comprehensive evaluation device using the method.

The invention relates to a metering performance verification device of a large-scale grounding resistance tester, and belongs to the technical field of large-scale grounding resistance testing. The calibration device of the present invention, the measurement performance of the large-scale grounding resistance tester includes: indication error, the influence of auxiliary grounding resistance on indication error, the influence of ground voltage on indication error, and the influence of ground grid self-inductance on indication error Influence and influence of crosstalk between test lines on indication error. The verification device of the present invention can quantitatively evaluate the anti-interference ability of the large-scale grounding resistance tester, and adds the influence of the two factors of grounding self-inductance and crosstalk between test lines, so that the large-scale grounding resistance tester can Testing in an environment that simulates real working conditions ensures the effectiveness of performance evaluation of large-scale ground grid testers.

The invention discloses a thermal-protection material thermal prevention and insulation system, a testing method and a heat treatment method. It can be achieved that a spacecraft thermal-protection material is closer to multi-state thermal prevention and insulation performance testing of a service environment. In the meanwhile, in the preparing process of the thermal-protection material, single-face heat treatment or sintering is conducted, the gradient temperature is formed in the thickness direction, the surface undergoes high temperature, service is stable at high temperature, while the inward temperature is gradually lowered, and both the mechanical property and the thermal insulation performance of the material are improved. As is tested, the overall mechanical property of the material can be improved by around 20%, and the heat conductivity can be lowered by 10% or above. Therefore, by means of the testing system, it can be achieved that the thermal-protection material is closerto the multi-state thermal prevention and insulation performance testing of the service environment, it can also be achieved that in the material preparing process, single-surface high-temperature quick heating is conducted, and the comprehensive performance of the thermal-protection material is improved.