Fluid machine and rankine cycle
a technology of rankine cycle and rankine machine, which is applied in the direction of positive displacement liquid engine, piston pump, liquid fuel engine, etc., can solve the problem of complicated configuration and achieve the effect of simple configuration
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first embodiment
[0028]FIG. 1 is a skeleton diagram illustrating a fluid machine 1 according to a first embodiment. FIG. 2A is a skeleton diagram when a scroll fluid machine 11 operates as an expander, and FIG. 2B is a skeleton diagram when the scroll fluid machine 11 operates as a compressor.
[0029]The fluid machine 1 according to the first embodiment includes a scroll fluid machine 11, a planetary gear 31, a pair of clutches 41 and 42, and a pulley 51 (first shaft).
[0030]First, an overview of the scroll fluid machine 11 will be described with reference to FIG. 3. FIG. 3 is a schematic diagram illustrating operation of the scroll fluid machine. Referring to FIG. 3, the scroll fluid machine 11 includes a cylindrical casing 12, a fixed scroll 13, and a movable scroll 14.
[0031]The fixed scroll 13 has a plate-like board portion (not illustrated) and a tooth portion 13a protruding to the movable scroll 14 side from the board portion. The movable scroll 14 also has a plate-like board portion (not illustra...
second embodiment
[0083]FIG. 9 is a skeleton diagram illustrating a fluid machine 1 according to a second embodiment, and FIG. 10 is a schematic block diagram illustrating the entire system of a Rankine cycle 61 having the fluid machine 1 according to the second embodiment, in which like reference numerals denote like elements as in FIGS. 1 and 7 of the first embodiment.
[0084]According to the first embodiment, the shaft of the refrigerant pump 62 is integrated with the rotation shaft 52 of the pulley 51 (refer to FIG. 1). For this reason, the refrigerant pump 62 is driven when the scroll fluid machine 11 operates as both the expander and the compressor. However, as recognized from FIG. 8B, when the scroll fluid machine 11 operates as a compressor, it is not necessary to operate the refrigerant pump 62 in practice. If the refrigerant pump 62 is driven unnecessarily when the scroll fluid machine 11 is driven using the engine power, the engine power is consumed uselessly.
[0085]In this regard, according ...
third embodiment
[0089]FIG. 11 is a skeleton diagram illustrating a fluid machine 1 according to a third embodiment, and FIG. 12 is a schematic plan diagram illustrating a planetary gear mechanism 31 according to the third embodiment, in which like reference numerals denote like elements as in FIG. 9 of the second embodiment.
[0090]The third embodiment is based on the configuration of the second embodiment. Specifically, according to the third embodiment, the refrigerant pump 62 is driven when the scroll fluid machine 11 operates as an expander, and the refrigerant pump 62 stops when the scroll fluid machine 11 operates as a compressor. In addition, according to the third embodiment, a freewheel clutch 113 is provided in all of the planetary gears 34 in the planetary gear mechanism 31, and the first clutch 41 is removed.
[0091]Typically, the freewheel clutch 113 is provided in all of three planetary gears 34. However, in some cases, the freewheel clutch 113 may be omitted partially and may be provided...
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