Rotor molded line for double-screw expansion machine
A twin-screw expander, rotor profile technology, applied in mechanical equipment, machines/engines, rotary piston engines, etc., can solve problems such as the inability to adapt to the thermodynamic performance of the expander, the inability to adapt to the low pressure ratio, and the large flow screw expander. , to achieve the effects of small thermal deformation and bending deformation, large area utilization coefficient, and reduced loss
Active Publication Date: 2014-05-14
SHANGHAI QIYAO EXPANDER
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Problems solved by technology
The tooth shape of the rotor of the existing screw expander is based on the profile of the screw compressor, which cannot adapt to the thermodynamic performance of the expander, especially the screw expander with a low pressure ratio and a large flow rate.
Method used
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Embodiment Construction
[0031] The tooth profile line of the screw expander rotor of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments:
[0032] see figure 1 , and refer to figure 2 ,in figure 1 It is a schematic diagram of an embodiment of the female rotor and the male rotor of the present invention when they mesh with each other; figure 2 It is a schematic diagram of the tooth profile of the rotor of the screw expander of the present invention, wherein a is a schematic diagram of the tooth profile of the female rotor; b is a schematic diagram of the tooth profile of the male rotor of the present invention. The rotor of the screw expander described in this embodiment is a male rotor and a female rotor with bilateral asymmetric teeth, for example, the gear ratio of the male rotor to the female rotor is 3:5. The tooth shapes of the female rotor and the male rotor end surfaces described in this embodiment are all formed by smooth ...
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The invention discloses a rotor molded line for a double-screw expansion machine. The rotor molded line comprises a female rotor tooth molded line and a male rotor tooth molded line and is characterized in that the female rotor tooth molded line and the male rotor tooth molded line are both formed by smoothly connecting a plurality of sections of quadratic curves in a head-to-tail mode. Each curve comprises an arc, a pin tooth arc and an arc envelope curve. The curve of each tooth of a female rotor includes an arc A2B2, an arc B2C2, a pin tooth arc C2D2, an arc envelope curve D2E2, an arc E2F2 and an arc F2G2 which are all connected in sequence. The curve of each tooth of a male rotor includes an arc envelope curve A1B1, an arc envelope curve B1C1, a pin tooth arc C1D1, an arc D1E1, an arc envelope curve E1F1 and an arc F1G1 which are all connected in sequence. Due to the fact that the female rotor and the male rotor are both formed by smoothly connecting quadratic curves including the arcs, the arc envelope curve and the pin tooth arcs, sealing with curve surface to curve surface can be completely achieved between the two rotors, the forming of a fluid power lubricating oil film is facilitated, and transverse leakage through contact lines is reduced. The rotors have large area coefficients among teeth and relatively short contact lines so that working efficiency of the expansion machine is improved, and mechanical abrasion is reduced.
Description
technical field [0001] The invention relates to a rotor profile of a twin-screw expander that operates conjugately in the cavity of the screw expander. Background technique [0002] The screw expander is a rotary volumetric device, which can operate in a high-efficiency state under a relatively large pressure and flow range. The quality of the rotor profile is the main factor affecting the performance of the expander. The expander uses the inverse principle of the screw compressor to work. The screw expander is a new type of high-efficiency and energy-saving full-power equipment that does not require high inlet parameters. The screw expander can not only drive the fan, expander, water pump, Can drive generators to generate electricity. Due to the low cost and strong adaptability of the screw expander, it can adapt to various working fluids, such as superheated steam, saturated steam, steam-water two-phase fluid and hot water (including high-salt hot water). way of economic...
Claims
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IPC IPC(8): F01C1/16F03C2/08
Inventor 杨剑肖芳陆征
Owner SHANGHAI QIYAO EXPANDER