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Mechanism of Pressure Offset Spinning Scroll
Pressure Offset Mechanism
It is comprised of a non end-plate follower scroll sandwiched between drive scroll and a drive scroll receptor.
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Competitor Scroll

Ultra High Speed Rotation Mechanism
- Both drive and follower scrolls are supported at bearings. Compared with normal cantilever support, no bending moments are generated, making high rotational speeds quite possible.
- Being a rotational mechanism rather than orbital, no centrifugal forces are generated, therefore making it practical to obtain high rotational speeds.
- Thanks to fully balanced configuration, no further balancing is necessary, and high speeds are obtainable.
Simple Seal Mechanism
- For the End-plate, instead of tip-seal, a special, simple seal mechanism is used.
- On the radial directions, common machining accuracy is maintained, however being a simple seal mechanism, high performance is achieved even without the need for precision machining.
- Because no surface to surface lap contacts are taking place, a low cost surface treatment such as common anodizing is adequate.
Synchronous Rotation Mechanism
- Since there is no need for thrust pressure support, a simple Oldham Coupling mechanism is incorporated.
- By use of resin and focusing the components closest to center, weight reduction and balance are achieved at high speeds rotation.
- Comparing with common pin cranks, both output and cost are significantly improved.
- Rotational radii of Wing Laps are reduced by half to enhance Oldham Coupling mechanism durability.
Simple Mechanism
- Simplified mechanism through use of Oldham Coupling and synchronizing the rotation of driver and follower scrolls.
- Components can be disassembled by common and commercially available tools. Easy maintenance, since no tip-seal is being used.
- The unit is all-aluminum, therefore generates minimum torque, and superb breakout characteristics.
Operation Principle
- By simultaneous rotation of non-coaxial driver and follower scrolls, crescent moon-like chambers are formed and as they rotate, gradually shrink in size, thus compressing the trapped air to be discharged through central port.
- There are two intake and two exhale chambers per one revolution.

- Joint Study and Development with Nagaoka University of Technology
- 08/28/08The announcement is about a high efficient oil free scroll turbine/expander for a wide range [more]
- Successful FC EXPO2008
- 03/30/08 Sorry for the late report. It was very busy 3days with many visitors and good discussions. Thank [more]


