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263results about How to "Evaluate performance" patented technology

Hanging type coaxial contrarotating rotor wing testing device

InactiveCN104913912AStudy aerodynamic propertiesEvaluate Rotor PerformanceMachine part testingWork measurementElectric machineRotary wing
The invention relates to the technical field of helicopter comprehensive tests, and discloses a hanging type coaxial contrarotating rotor wing testing device. The hanging type coaxial contrarotating rotor wing testing device comprises a lifting platform, a lower base, an upper base, a motor, an upper rotor wing speed changer, a lower rotor wing speed changer, an upper rotor wing unit, a lower rotor wing unit, an upper rotor wing measuring unit and a lower rotor wing measuring unit, wherein the lifting platform is arranged on a bracket in a mode of being capable of sliding up and down, the lower base is arranged on the lifting platform, the upper base is connected with the bracket and located above the lower base, the motor is arranged on the lower base, the upper rotor ring speed changer and the upper rotor wing speed changer are connected with the motor, the upper rotor wing unit and the lower rotor wing unit are coaxially arranged. Both the upper rotor wing unit and the lower rotor wing unit comprise a rotor wing shaft, a rotor wing arranged in the rotor wing shaft and a rotor wing manipulating assembly connected with the rotor wing. Both the upper rotor wing measuring unit and the lower rotor wing measuring unit comprise a torque balance which is connected with the speed changer and the rotor wing shaft and a rotor wing balance which is connected with the rotor wing manipulating assembly. According to the invention, the upper rotor wing and the lower rotor wing are separated and respectively equipped with the measuring unit, a force, the bending moment and the torque of each rotor wing can be measured independently, and the space between the upper rotor wing and the lower rotor wing can be adjusted, thereby being capable of effectively evaluating the performance of each rotor wing and studying aerodynamic characteristics of each rotor wing.
Owner:BEIHANG UNIV +1

Simulation platform system and method of hydraulic operating mechanism for ultra-high-voltage circuit breaker

The invention relates to a simulation platform system and method of a hydraulic operating mechanism for an ultra-high-voltage circuit breaker. An energy storage system, a control valve system, a hydraulic cylinder and buffering system and a pipeline system are adopted in the method. The energy storage system comprises an initial parameter calculating module, an energy accumulator building module and a charging device submodule. The control valve system comprises an electromagnetic pilot operated valve, an amplifying valve and a main valve submodule. The hydraulic cylinder and buffering system comprises a differential type hydraulic cylinder and a cylinder buffering parameterized model submodule. A pipeline subsystem comprises an on-way pressure loss model and a local pressure loss model submodule. By means of theoretical modeling and parameter determining, the four systems are introduced into a simulation model building and calculating system, and the calculation result is output through a result output system. The simulation platform system and method can carry out computer analog simulation and accurate evaluation on the comprehensive characteristics of the hydraulic operating mechanism for the ultra-high-voltage circuit breaker, the product design period is shortened, the test cost is reduced, and the blindness of a test is avoided.
Owner:WUHAN UNIV
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