Water and gas pressure adjustment-based phytotron multiple icing type forming method

Abstract

The invention relates to a water and gas pressure adjustment-based phytotron multiple icing type forming method. The water and gas pressure adjustment-based phytotron multiple icing type forming method is implemented through the following test platform, which is composed of an atomizing spray system inside a phytotron and an icing water system and an icing gas system outside the phytotron. The atomizing spray system comprises an icing water atomizing spray nozzle set composed of a plurality of atomizing spray nozzles; the icing water system is connected with the water inlet of every atomizing spray nozzle; the icing gas system is connected with the gas inlet of every atomizing spray nozzle; the icing test is started after the phytotron is cooled to a target temperature. By adjusting the pressure of icing water and icing gas, the number and the diameter of water / fog drops sprayed out of the icing spray nozzles, namely, multiple icing types such as glaze, rime, mixed rime and wet snow can be formed on the surface of a test object, and meanwhile, continuity of the icing types can be achieve in one test, so that equivalence between the icing test result of the phytotron and the actual situation in the natural environment can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a method for forming multiple types of icing in an artificial climate chamber based on water vapor pressure regulation. Background technique [0002] Icing of power transmission and transformation equipment is one of the main problems that endanger the safe operation of power systems. In recent years, accidents of falling towers due to icing, disconnection and insulator flashover and tripping have occurred frequently at home and abroad, which have seriously affected the normal power supply of people's production and life. In order to study the icing mechanism and ice melting characteristics of power transmission and transformation equipment, domestic and foreign universities and scientific research institutions have successively established their own large-scale artificial climate simulation laboratories, and carried out a large number of icing, icing a...

AI Technical Summary

Problems solved by technology

At present, the artificial climate chambers at home and abroad mainly adopt the following two methods in order to form the above-mentioned types of ice coating on the surface of the sample during the ice coating test: one method is to reduce the ambient temperature of the climate chamber (natural observation and The climate chamber test shows that when the particle size of ice-coated water is 50-100 μm, the ambient temperature for forming rime is -4~0°C, the temperature for mixed rime is -8~-4°C, and the temperature for rime is -10~- 8°C, the temperature of wet snow ≤ -10°C), due to the extremely low ambient temperature required for the formation of rime and wet snow, this method has the defects of large power consumption of refrigeration equipment and poor economy; another method is to replace different The diameter of the nozzle can be used to realize rime, rime and wet snow (for example, the artificial climate laboratory of the State Grid Electric Power Research Institute can use pipe wall hydraulic nozzles when forming rime, and use aerodynamic force when forming rime and snow. type nozzle), because the nozzle needs to be replaced, this method has a lot of inconvenience in the icing test, and the continuity of the icing type cannot be achieved in one test