Axial sealing device for a scroll-type fluid displacement appara

Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll

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Details

418142, 418178, F01C 104, F01C 1908, F01C 2100

Patent

active

045403554

ABSTRACT:
A scroll-type fluid displacement apparatus is disclosed having a pair of scroll members each comprising an end plate and a spiral wrap extending from one side of the end plate. The spiral wraps interfit at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed-off fluid pockets. At least one of the scroll members has a discharge port or fluid hole near the center of the spiral element and is provided with an anti-wear plate on its end surface facing the other scroll member. The anti-wear plate is an involute plate that covers substantially the area of the end surface of the end plate on which the spiral wrap of the other scroll member makes contact during the orbital motion of the orbiting scroll member. The radially inner end of the anti-wear plate is spaced from the discharge port to avoid blocking the discharge flow or covering the discharge port. Therefore, the undesirable vibration of the anti-wear plate by fluid flowing through the port is avoided.

REFERENCES:
patent: 994391 (1911-06-01), Haver
patent: 3313239 (1967-04-01), Brunson et al.
patent: 3361074 (1968-01-01), Eckerle
patent: 3680990 (1972-08-01), Pettibone et al.
patent: 3887310 (1975-06-01), Gerber
patent: 3986799 (1976-10-01), McCullough
patent: 4047855 (1977-09-01), Goloff et al.

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