Light medium high-energy head compressor model stage with flow coefficient being 0.0264 and design method

A flow coefficient and compressor technology, applied in the field of compressors, can solve problems such as unfavorable rotor stability, difficult product design, and low efficiency of the stage, and achieve the effects of high-energy head coefficient, small span, and large wheel-to-hub ratio

CN108561331AInactive Publication Date: 2018-09-21SHENYANG TURBO MASCH CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-09-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a light medium high-energy head compressor model stage with the flow coefficient being 0.0264. The model stage comprises an impeller, a blade diffuser, a curve and a backflow device. The impeller is located at the inlet position of the model stage. The blade diffuser is arranged at an outlet of the impeller. The backflow device is located at the outlet position of the modelstage. The blade diffuser communicates with the backflow device through the curve. According to the model stage, the machine Mach number Ma2 is equal to 0.2-0.65, the design point flow coefficient phi1 is equal to 0.0264, the design point energy head coefficient tau is equal to 0.71, the polytropic efficiency eta pcl under the design flow coefficient working condition is equal to 0.8515, and the application flow range is 0.71-1.37 of the design point. A design method of the model stage is further provided. The model stage is high in efficiency, high in energy head coefficient, large in hub ratio and small in span; and through the adoption of the model stage, a light medium compressor can have the high operation efficiency and the wide working condition range, meanwhile, the work rotating speed of a rotor can be reduced easily, the bearing span can be shortened, and the stability of the rotor can be improved.
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Description

technical field

[0001] The invention relates to the technical field of compressors, in particular to a model stage and a model stage design method of a light-medium high-energy head compressor with a flow coefficient of 0.0264. Background technique

[0002] Light-medium high-energy head compressors are generally used in methanol (outlet pressure below 90 kg) and fertilizer plants (outlet pressure 150-160 kg). There are about 20-30 sets of syngas units on the market every year, and the demand is large. At the same time, its Industrial products are key products that affect people's livelihood. The quality of the model and design will affect the performance, operation stability and energy consumption of the unit.

[0003] At present, the efficiency of the existing light medium compressor model stage is low. At the same time, the existing model-level hub is relatively small, which is not conducive to the stability of the rotor when the number of stages is large, and there are r...

Examples

Embodiment Construction

[0036] see figure 1 , a light medium high-energy head compressor model stage with a flow coefficient of 0.0264 provided by the embodiment of the present invention is suitable for the modular design of light medium compressor products, including impeller 1, vane diffuser 2, bend 3 and reflux device 4 , where the impeller 1 is located at the inlet of the model stage, the outlet of the impeller 1 is provided with a vane diffuser 2, and the reflux device 4 is located at the outlet of the model stage, and the vane diffuser 2 and the reflux device 4 are connected by a bend 3 Pass. The machine Mach number M that can be used by this model level a2 =0.2-0.65, design point flow coefficient Φ 1 =0.0264, the design point energy head coefficient τ=0.71, the variable efficiency η under the design flow coefficient working conditions at each Mach number pcl =0.8515, the applicable flow range is 0.71~1.37 of the design point. Specific performance curves such as Figures 16-18 shown.

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