Centrifugal fans are an important part of the oil cooling system for a high-performance helicopter

Centrifugal fan is an important part of high-performance helicopter oil cooling system, which drive the cold air through the oil cooler, took over the transmission system cooling oil heat, ensure the normal operation of helicopter main reduction system.  Instrumentation ball valve  fan performance the quality of the oil radiator as well as the efficiency of the entire oil system plays a vital role as an engine oil cooling system components helicopters, centrifugal fan with low flow, high pressure, high speed, small size Features This article based on the characteristics of a  Instrument valve manifold  a fan, a detailed analysis of the design parameters of the basic structure and calculation, blade profile, the preparation of the versatility of the design software, the use of technology to achieve the automatic generation of the impeller three-dimensional graphics, and gives the design instance.

Valve controlled protection system with high reliability and long-running sexual

Axial fan to blast valve as research object, the check valve controlled protection system , aimed at the check valve itself does not affect the work of the case , in the blast when the normal flow of ventilation ducts , improve valve valves, reducing valve head loss , improve blast furnace steel production . Valve controlled  2 way manifold  parts protection system using electromagnets and three-phase AC motor as the driving force to enhance the valves, electric control part adopts PLC as the main control device to control the movement of the mechanical structure ;  Instrument manifold  ​​redundant monitoring module , to improve the system reliability ; prepared using the graphical programming software remote monitoring program to facilitate the operator to operate the control system and view historical data ; serial communication and the use of CAN bus technology to connect PLC  Instrument valve manifold , redundant monitoring module and a remote monitoring system. Valve controlled protection system with high reliability and long-running nature , and has expansion capability. The greatest feature of this system is the mechanical moving parts with our own security, which can be electrically controlled in the case of partial failure of the check valve can still ensure the work ; Meanwhile , PLC and redundant monitoring module via two communication systems simultaneously, improving reliability ; preparation RMON program good user interface , making the system easier for the operator to accept.