Spiral displacement machine with radially inner seal gap for tem

Details Spiral displacement machine with radially inner seal gap for tem Spiral displacement machine with radially inner seal gap for tem

1990-02-09

1990-11-13

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418 83, 418142, 277 26, 277 81P, 277204, F01C 104, F01C 1908, F16J 1534

Patent

active

049698109

ABSTRACT:
A spiral displacement machine for compressible media is described which has at least one displacement chamber in the form of a spiral-shaped groove arranged in a stationary housing and also has a spiral rib-shaped displacement body associated with each displacement chamber. Each displacement body is on the side of a disc-shaped rotor which is driven eccentrically in a translatory movement relative to the housing. During operation, each peripheral point of the displacement body performs a circular movement bounded by the peripheral walls of the associated displacement chamber. At the edges of the displacement bodies and of the housing walls forming the displacement chambers, sealing strips mounted in spiral grooves engage the adjacent surfaces of the other component of the machine. In order to ensure the most uniform possible application of the sealing strips against the adjacent surfaces during hot operating states of the displacement machine, the depth of the spiral-shaped sealing grooves and/or the height of the sealing strips is varied over the length of the spiral so that, at ambient temperature, when the sealing strips engage the bottom of the groove, the sealing gap at the radially inner end of the spiral is larger than at the outer end by an amount equal to the difference in expansion of the components at those ends during operation.

REFERENCES:
patent: 4722676 (1988-02-01), Sugimoto

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