Composite single screw expander
An expander, single-screw technology, used in mechanical equipment, machines/engines, non-variable-capacity engines, etc., can solve the problem of low thermal efficiency, and achieve the effects of strong performance, stable operation, and high expansion ratio.
Inactive Publication Date: 2015-07-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Many devices have the problem of low thermal efficiency. The core component in the thermal power conversion process is the expander, which is the key equipment for converting thermal energy into mechanical energy.
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[0015] Refer to attached figure 1 , the fluid flows into the expander from the side with the smaller outer diameter of the rotor. Grooves are formed between adjacent threads of the screw rotor, and fluid passages are formed between the grooves and the housing. The fluid flowing in the flow channel is actually equivalent to an expansion process, the pressure and temperature decrease, the enthalpy value decreases, and the rotor is driven to rotate, and the reduced enthalpy value is converted into output work.
[0016] Refer to attached image 3 , since the distance between adjacent threads gradually increases from the fluid inflow side to the outflow side, it means that this structure has a larger expansion ratio than a screw rotor with a constant distance, that is, a stronger working function force.
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A composite single screw expander comprises a conical shell (2) and a screw rotor located in the conical shell (2), wherein the small-diameter end of the conical shell (2) is provided with a small-diameter end opening (3), the large-diameter end of the conical shell (2) is provided with a large-diameter end opening (1), and the screw rotor is composed of a shaft (6), a cone (5) and a thread (4). The two ends of the shaft (6) penetrate through the small-diameter end opening (3) and the large-diameter end opening (1) respectively, the cone (5) is fixed on the shaft (6) or is of an integrated structure with the shaft (6), the small-diameter end of the cone (5) is located at the side of the small-diameter end opening (3), the large-diameter end of the cone (5) is located at the side of the large-diameter end opening (1), and the thread (4) is formed in the cone (5); the thread interval of the thread (4) is gradually increased from the small-diameter end to the large-diameter end of the cone. Fluid flows and expands in the turbine expander to drive the rotor to rotate, and therefore enthalpy drop is converted to mechanical energy to be output through the shaft (6).
Description
technical field [0001] The invention relates to a composite single-screw expander. Background technique [0002] The process of successful heat conversion is the most common thermal process, which is commonly found in power equipment, heat recovery, power generation and other devices. One of the most concerned by researchers is how to improve the efficiency of heat conversion into work. Many devices have the problem of low thermal efficiency. The core component in the thermal power conversion process is the expander, which is the key equipment for converting thermal energy into mechanical energy. The structure and efficiency of the expander directly affect the efficiency and economy of the thermal process. In addition, with the advancement of the industrial level, people are paying more and more attention to the impact of equipment on the environment and reliability. Therefore, it has great practical significance to propose an expansion device with low noise, low vibratio...
Claims
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Inventor F·阿西夫韩东何玮峰岳晨蒲文灏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS