無傳感器液壓系統(tǒng)的壓力實時監(jiān)測和控制————英語論文解讀-wenkub
2023-04-19 01:08:05 本頁面
【正文】 esearch proposes to develop a pumping controller able to maintain constant pressure within the hydraulics system without utilizing a pressure transmitter and controller. The main purpose of this undertaking is to ensure that the controller will have no physical contact with the medium. Thus removing the pressure transmitter ponent of pump pressure control in order to achieve the reduction of a ponent. In pleting the functionality, a realtime monitoring, configuration and control system software package is also being developed.2 MethodologyThis research proposes to remove the pressure transducer ponent of pump pressure control in order to achieve an efficient process [5]. Fig. 2 represents the proposedpressure control system whereby all the pressure control is performed within the Variable Speed Drive itself, the WEB server is simply a remote user interface. Fig. 2. Illustration of proposed Pressure Control System System ConfigurationThe culmination of some specified equipment that will be listed in next section resulted in the final test product as can be seen from Fig. 3. The outlet of the pump feeds into the tank creating a closed loop system. The pressure transmitter has then been connected back into the VSD and the VSD is then monitored for pressure, speed and motor current readings. Fig. 4 shows photo’s of the actual test equipment used. Fig. 3. Closed Loop Testing System PI DiagramFig. 4. This Photograph is of Closed Loop Testing system and Testing System’s Pump, Pressure Transmitter and VSD System ComponentsFollowing is the ponents that have been utilized for this project. Each item has been carefully chosen for its suitability for the purpose of the research.A pumping system essentially consists a supply or suction side, a pump with a driver and a discharge or delivery side [8]. A centrifugal pump alternatively is known as a pressure generator because its rotating element transfers the energy to the fluid [2,8]. Not withstanding the fact that the centrifugal pump is one of the most widely used pumps for transferring liquids, it also has excellent ability to control pressure, is quiet in parison to other pumps, has relatively low operating and maintenance costs, takes up minimal floor space and can create a uniform, non pulsating flow [2, 3].For these reasons above, the type of pump chosen is a Centrifugal pump with a Radial Flow Impeller driven by a suitably sized Squirrel cage induction motor.This form of pump consists of a shaft mounted impellers rotating unidirectionally within a casing. The velocity head is converted into pressure head by the Volute which directs the liquid from the outer perimeter of the impeller to the pump discharge[1].A VSD alters the speed of an electric motor by means of modulating the power to that motor. The VSD maintains constant
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