CN202579249U

CN202579249U - Centrifugal compressor with multiple shafts

Info

Publication number: CN202579249U
Application number: CN 201220215884
Authority: CN
Inventors: 苏春模
Original assignee: Changsha Aerturbo Compressor Co Ltd
Current assignee: Changsha Aerturbo Compressor Co Ltd
Priority date: 2012-05-15
Filing date: 2012-05-15
Publication date: 2012-12-05
Anticipated expiration: 2022-05-15

Abstract

The utility model discloses a centrifugal compressor with multiple shafts. The centrifugal compressor with the multiple shafts comprises three-dimensional impellers and a gear speed-increasing box with a plurality of parallel shafts, wherein the three-dimensional impellers are directly installed on two shaft ends of high speed shafts among the parallel shafts. The impellers installed on the two shaft ends of each high speed shaft are both the three-dimensional impellers, molding of three-dimensional twisted blades of the three-dimensional impellers is close to the real condition of gas flow in the impellers, secondary flow losses of a compressor is basically eliminated, efficiency is high, and efficiency increases by 8-10% and energy saves 2-10% compared with efficiency and energy of existing compressors of the same kind. The three-dimensional impellers have good step-up ability, the diameters of the impellers are smaller than those of conventional impellers, rotational inertia of equipment is low, starting currents of a motor are reduced, and operation is safe and reliable. Complete machine performance of the centrifugal compressor with the three-dimensional impellers is flat in curves; surging flow in minimum can reach 50-70% of designed point flow; compared with that of conventional centrifugal compressors with the three-dimensional impellers, the complete machine surging flow moves to a smaller value; and therefore reliability of the compressor is improved.

Description

The multiaxis centrifugal compressor

Technical field

The utility model relates to a kind of multiaxis centrifugal compressor.

Background technique

Centrifugal compressor is a kind of rotating vanes gas compression machinery, and gas is sucked by suction chamber, through impeller gas is done work; Gas pressure, speed, temperature are improved, and then through Diffuser, speed reduces; Change the pressure ability into by kinetic energy, pressure is improved, flow into the bend and the return channel of guiding again; Make gas get into the next stage compression, the pressurized gas that last final stage is come out are discharged along spiral case and pneumatic tube.The multiaxis centrifugal compressor is overall gear combined type, multiaxis (can reach 3 at most), multistage (can arrive 6 grades at most) compression, cooling step by step, vertical subdivision scroll casing type centrifugal compressor.By motor direct-drive, motor is connected with the Large Gear Shaft During of speedup box through coupling, and compressor and speedup box are whole integrated morphology, and compressor impeller is directly installed on the speedup box pinion shaft, and every section has independently spiral case and Diffuser.The multi-shaft compressor main frame is made up of independent multistage compressor and gear speedup case, and the impeller of each stage compressor is suspended on the spindle nose of the corresponding high speed gear shaft of gear speedup case respectively.

Impeller is claimed active wheel again, with the main shaft high speed rotating, gas is done work; Gas is under the effect of impeller blade, and and then impeller is done high speed rotating, flowed by the effect of rotary centrifugal force and the diffusion in the impeller; When gas stream went out impeller, gas pressure intensity, temperature, speed all were improved.So impeller is the core component of centrifugal compressor; The ability and the wasted work of decision compressor are that the good and bad key point of its complete machine performance is present, and the multiaxis centrifugal compressor still adopts the impeller according to the mobile Design Theory of monobasic mostly at present; Be the binary impeller, efficient is low, energy consumption is big.

The model utility content

The purpose of the utility model is to provide a kind of and can cuts down the consumption of energy, the multiaxis centrifugal compressor of raising the efficiency.

This multiaxis centrifugal compressor that the utility model provides comprises impeller and the gear speedup case that many parallel axes are arranged, and impeller is directly installed on the two axial ends of the high speed shaft in the parallel axes, and said impeller is a 3 d impeller.

The impeller that the two axial ends of every high speed shaft of the utility model multiaxis centrifugal compressor gear speedup case is installed is 3 d impeller; The time of day that the moulding of its ternary twisted blade of 3 d impeller is flowed near the impeller internal gas more; Basically eliminated the secondary flow loss of compressor, flow losses are little, and efficient is high; Improve 8～10%, energy-conservation 2～10% than existing similar compressor efficiency; 3 d impeller has good boost capability, makes the more conventional impeller of impeller diameter little, makes equipment possess lower rotary inertia, reduces the inrush current of motor, moves more safe and reliable; The complete machine performance curve of 3 d impeller centrifugal compressor is smooth, and the I of surge flow reaches 50～70% of design point flow, compares with conventional impeller centrifugal compressor, and complete machine surge flow is shifted to littler value, has improved the reliability of compressor.

Description of drawings

Fig. 1 is the structural representation of the utility model preferred embodiment.

Fig. 2 is the 3 d impeller structural representation of the utility model.

Fig. 3 is the structural representation of impeller in the existing technology single-shaft multi-stage centrifugal compressor.

Embodiment

To shown in Figure 2, this multiaxis centrifugal compressor that this preferred embodiment provides is a four-stage compressor, and three parallel axes are arranged in the gear speedup case 4 like Fig. 1, wherein has two to be high speed shaft 2, and every high speed shaft 2 is joined two stage compressor; The import of every stage compressor all is provided with fluid director 1, and the two axial ends of every high speed shaft 2 is mounted impeller 3 respectively, and this impeller is a 3 d impeller; 3 d impeller is compared with traditional monobasic flow design; The time of day that flows near the impeller internal gas more, flow losses are little, and thermodynamic efficiency is high.During work, gas flows into impeller 3 through fluid director 1, through 3 pairs of gases actings of impeller, gas pressure, speed, temperature is improved, and gas stream is when expanding channel, and gas flow speed progressively slows down again and becomes the raising of gas pressure.

Claims

1. a multiaxis centrifugal compressor comprises impeller and the gear speedup case that many parallel axes are arranged, and impeller is directly installed on the two axial ends of the high speed shaft in the parallel axes, it is characterized in that: said impeller is a 3 d impeller.