Patent ID: 11971034
Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A scroll fluid machine comprising:
a fixed scroll having a first mirror plate and a helical wrap provided upright on the first mirror plate;
an orbiting scroll having a second mirror plate and a helical wrap provided upright on the second mirror plate;
a drive shaft that causes the orbiting scroll to orbit relative to the fixed scroll; and
a helical tip seal inserted into a seal groove formed at least in one of the wrap of the fixed scroll and the wrap of the orbiting scroll,
a plurality of working chambers being formed between the wrap of the fixed scroll and the wrap of the orbiting scroll, wherein
the tip seal has
a tip seal groove that has an opening at a central portion in a seal width direction on a sliding surface of the tip seal,
a plurality of bottom lips disposed along a bottom surface of the tip seal at predetermined intervals in a seal extension direction, and
a communication hole that establishes communication between an inside of the tip seal groove and a working chamber on an inner side in a wrap width direction,
the communication hole is shorter than the tip seal groove in the seal extension direction,
one of the communication hole is provided for one of the tip seal groove, and
the tip seal groove is shorter than a length of two of the predetermined intervals in the seal extension direction.