Numerical Simulation And Analysis On Main Engine Working Process Of Balance Typr Twin-screw Compressor

Twin-screw compressor is widely used in war industry, metallurgy, petroleum, chemicalindustry, ship, wharf, electricity, machinery, building materials, textile, papermaking, oildepot, enveriment protect, food industry and so on.Traditional twin-screw compressor haveonly one working chamber, one side is used for suction, the other side is asymmetric structureused for exhaust, which leads to the screw rotors bear a single direction axial force,while theaxial force increase with the increase of output pressure and displacement. But if the bigdisplacement twin-screw compressor applied in oil and petroleum fields suffer high axialforce, it would have a strong impact on the failure-free operation cycle. In order to meet theneed of market demand, research group carry out the development of less axial load balancetype twin-screw compressor.In order to balance axial force, balance type twin-screw compressor adopts doubleworking chambers, whose rotors stress distribution, structural style, structure parameter andinner flow field situation change a lot. Obviusly, according to traditional screw compressordesign theory and method for the balance type twin-screw compressor design is difficult toachieve the best effect.Thus, this article carry out the research of rotor load characteristic and thermaldeformation under the condition of displacement, screw line, suction and exhaust structure byusing fluid mechanics, theoretical model and simulation, build the3D model of balance typetwin-screw compressor, numerical simulate and analyze on its main engine working processby the use of ANASYS WORKBENCH software, analyze main engine flow field changesituation and so on. These researches play a key role in accelerating balance type twin-screwcompressor development process, in reducing development cost and in realizing numericaldesign of balance type twin-screw compressor.Through the research of screw rotor line geometrical characteristic and compressorengine performance, screw rotor contour parameter and compressor main parts structures andcontour dimensions are determined. On the basic of this,3D simulation models of balancetype twin-screw compressor screw rotor and other main parts are established by the use ofPRO/E3D modeling. Then import the models in seamless connection way into ANASYSWORKBENCH software, and finish numerical simulation and anysis on balance typetwin-screw compressor. Aim at how to improve rotor axial force analytical precision, researchon screw rotor precise loading methods is conducted, and loading way based on meshingcontact line is put forward. For the sake of verify balance type twin-screw compressor screw rotor axial force is zero, a thermal stress analysis is made. In order to know the screwcompressor inner parts velocity field, temperature field and pressure field distributionsituations, fluid field analysis on traditional compressor and balance type twin-screwcompressor main engine working process is engaged. In order to know balance typetwin-screw compressor septal part and exhaust seat backflow, eddy distribution condition andinfluence factors, numerical simulations under different working conditions are done. Exhaustseat structures influence inner backflow and eddy conditions, select different exhaustparameters, make numerical simulations on screw compressor working process respectively,and extract related datas from the analysis results, which will plays a important role inoptimizing exhaust seat, improving complete machine performance and vomume efficiency.The involved instances and related data are applied to corporation practical application,the result shows that this reserach has the value of engineering applications and practicalsignificance.