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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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Pneumatic lubricating oil supplying system for organic Rankine cycle expansion machine based on four-way reversing valve
  • Pneumatic lubricating oil supplying system for organic Rankine cycle expansion machine based on four-way reversing valve
  • Pneumatic lubricating oil supplying system for organic Rankine cycle expansion machine based on four-way reversing valve

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Example Embodiment

[0016] Example 1: Such as Figure 4 As shown, 6, 8, 9, and four one-way valves can be integrated into a whole. The upper part of the whole is equipped with oil separation equipment such as a separation filter, the lower part is two working chambers 8, 9 and a total of 4 one-way valves are installed on the upper and lower parts of the working volume 8, 9. The four ports a, b, c, and d of 7 are respectively connected to the inlet pipe of the expander, the upper part of the working volume 9, 6 and the working volume 8. At the same time, a partition is installed on the upper part of 8 and 9 to reduce the risk of mutual dissolution of gas working fluid and lubricating oil. The two working volumes 8 and 9 are alternately used to inject oil into the expander and to collect 6 separated lubricating oil. When 7 is energized, the high-pressure gas at the inlet of the expander is introduced into the expander from port a in 9 and the lubricating oil in it is used to inject the expander, a...

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Abstract

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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Application Information

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IPC IPC(8): F01C21/04
CPCF01C21/04F01C21/045
Inventor 雷标吴玉庭马重芳郭航
Owner BEIJING UNIV OF TECH
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