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Geng A.,Shandong Agricultural University | Geng A.,Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments | Zhang X.,Shandong Agricultural University | Cao S.,Yan Zhou XinYan Agricultural Machinery Station | And 3 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering

According to the fact that the current application state of tobacco pesticide of restrain-germinatin, intelligent spraying system on target was designed, which consists of bracket, speed sensor, tobacco stalk sensor, stepping motor, reel, electromagnetic valve, the slider, slippery course, one-way valve, nozzle, travel switch and SCM system, etc. Speed sensor can carry out real-time detection in response to the working speed of the unit, and SCM system controls the rotation speed and angle of stepping motor according to the detected unit working speed and magnetic valve starting time respectively. And SCM system also controls the magnetic valve opening and closing according to the presence or absence of the tobacco stalk signals. Indoor test showed the more slowly the test station moves(within 0.3-0.45 m/s ), the greater pesticide quantity (Qs≥15 ml)and the better pesticide effect. With the rise of pesticide pump pressure, pesticide collection will reduce slowly. The test result of model machine indicated intelligent aiming spraying system of tobacco pesticide of restrain-germinatin can work accurately and reliably and satisfy the application requirements. Source

A variable geometry turbine for turbochargers in exhaust gas recirculation engines incorporates a turbine housing having an exhaust inlet with a first side receiving exhaust from cylinders having exhaust gas recirculation (EGR) and a second side receiving exhaust from non-EGR cylinders. The first side has a first EGR-driving passage and a second EGR-driving passage and the second side having a first non-EGR-driving passage and a second non-EGR-driving passage. A first control valve is associated with the second EGR-driving passage and a second control valve is associated with the second non-EGR-driving passage. A controller is adapted to control the first and second control valves.

Kangyue Technology Co. | Date: 2013-01-24

A centrifugal compressor, including: a housing, the housing including: an inlet, a flow channel, an impeller outlet, and an air diffusing channel; a centrifugal impeller disposed inside the housing; a rotating wall, the rotating wall including a front cascade; and a rotating disc, the rotating disc including a rear cascade. The impeller outlet is disposed adjacent to a rear part of the centrifugal impeller and is connected to the flow channel via the air diffusing channel. The rotating wall is disposed between the centrifugal impeller and the housing. The front cascade is disposed inside the front part of the rotating wall and is connected to a dynamic driving device. The rotating disc is disposed inside the housing adjacent to the air diffusing channel and is in a rigid connection with the rotating wall.

Kangyue Technology Co. | Date: 2013-02-03

A turbine device, including: a turbine housing including an inlet, a flow channel, an outlet, a middle partition, an arced partition; a turbine impeller; a gas outlet; and an exhaust manifold. The turbine impeller and the gas outlet are arranged inside the turbine housing. The exhaust manifold is connected to the inlet. The flow channel is arranged inside the turbine housing. The outlet is arranged on the flow channel close to the turbine impeller. The middle partition is disposed inside the flow channel and divides the flow channel into a left flow channel and a right flow channel. The arced partition is arranged in both the left and right flow channels. One end of the arced partition is in a rigid connection with the middle partition, and the other end of the arced partition is close to the outlet of the turbine housing.

Li D.,Beijing Institute of Technology | Yang C.,Beijing Institute of Technology | Zhou M.,Bohai Shipbuilding Vocational College | Zhu Z.,Kangyue Technology Co Ltd | Wang H.,Kangyue Technology Co Ltd
Science China Technological Sciences

Three different inlet configurations, including a original straight pipe and two bend pipes with different axial length, for a high speed low mass flow centrifugal compressor were modeled with whole blade passages and simulated unsteadily by 3D viscous Navier-Stokes equations. The performance disparities of compressor stage were tested and verified by experiments in which dynamic pressure data acquisition of internal flow field was performed. As the result shows, the choke point decreases to lower mass flow rate due to the distortion caused by bend-pipe inlet and is aggravated as the rotation speed increases. The distortion effect spreads circumferentially in impeller and makes the flow structure varied. The longer axial distance bent inlet leads to larger radial distortion and heavy blockage at mid-span under large mass flow mainly causes compressor choke margin narrowed. Bend pipe distortion brings an impact up to diffuser on unsteady pressure pulsation caused by blades sweep and the impact appears more powerful when it is closer to volute tongue. © 2011 Science China Press and Springer-Verlag Berlin Heidelberg. Source

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