Pneumatic lubricating oil supplying system for organic Rankine cycle expansion machine based on four-way reversing valve
A technology of four-way reversing valve and Rankine cycle, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of consumption of expander output power and leakage of shaft seals, so as to avoid power consumption and eliminate leakage risk effect
Active Publication Date: 2018-11-27
BEIJING UNIV OF TECH
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Problems solved by technology
The disadvantage of this solution is that the ordinary oil pump is driven by the motor, which will consume part of the output work of the expander, and there is a risk of leakage at the shaft seal
Method used
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Embodiment 1
[0016] Embodiment 1: as Figure 4 As shown, 6, 8, 9 and four check valves can be integrated into a whole. The upper part of the whole is equipped with oil separation equipment such as a separation screen, and the lower part is divided into two working chambers 8 and 9, and 4 check valves are installed on the upper and lower parts of the working volume 8 and 9. The four ports a, b, c, and d of 7 are respectively connected to the inlet pipeline of the expander, the upper part of the working volume 9, 6 and the working volume 8. At the same time, a baffle is installed on the upper part of 8 and 9 to reduce the risk of mutual dissolution of gas working medium and lubricating oil. The two working volumes 8, 9 are alternately used to fill the expander with oil and collect lubricating oil separated from 6 respectively. When 7 is energized, 9 introduces high-pressure gas at the inlet of the expander from port a of 7, and the lubricating oil in it is used to inject into the expander,...
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The invention relates to a pneumatic lubricating oil supplying system for an organic Rankine cycle expansion machine based on a four-way reversing valve, belonging to the field of utilization of low-grade energy sources. The pneumatic lubricating oil supplying system is mainly characterized in that an organic working medium is sequentially conveyed through a condenser, a working medium pump, an evaporator, an expansion machine and an oil separator and is finally returned for circulation. Output power of the expansion machine is used for driving a power generator. Lubricating oil separated froman oil-gas separator can be injected into two containers through a one-way valve. Inlet high-pressure gas of the expansion machine is connected to an port a of the four-way reversing valve, ports b and d are respectively connected to the upper parts of the two containers, and a port c is connected to the upper part of the oil-gas separator. The inlet high-pressure gas of the expansion machine canbe alternately introduced into the two containers through the four-way reversing valve, so that the lubricating oil in the four-way reversing valve can be conveyed to the expansion machine so as to realize oil supply. Gas on the upper parts of the containers can be introduced into the upper part of the oil-gas separator through the four-way reversing valve. According to the pneumatic lubricatingoil supplying system, a traditional mechanical oil pump is omitted, and the leakage risk of a shaft seal of the oil pump is eliminated.
Description
technical field [0001] The invention relates to an organic Rankine cycle volume expansion machine lubricating oil supply system, which belongs to the field of low-grade energy utilization. Background technique [0002] The use of organic Rankine cycle can efficiently convert industrial waste heat, geothermal and other low-grade energy into mechanical energy. The key component of the Organic Rankine cycle is the expander. Positive displacement expanders such as single-screw expanders, twin-screw expanders, and scroll expanders have the advantages of large expansion ratio, high efficiency, low rotation speed, and two-phase expansion, and have a good performance in the field of organic Rankine cycle. application prospects. But the above-mentioned expanders generally require a reliable lubricating oil supply system for lubrication, cooling and sealing. The traditional lubricating oil supply scheme for organic Rankine cycle expander is attached figure 1 shown. The specific p...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01C21/04
CPCF01C21/04F01C21/045
Inventor 雷标吴玉庭马重芳郭航
Owner BEIJING UNIV OF TECH