Motor-compressor unit mounting arrangement for compressors
View Patent ↗A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets, stator, outboard bearing assembly, and drive shaft. Thereafter, the motor-compressor unit subassembly is inserted into a first end of the housing, and the housing is shrink-fit around the subassembly. The mount brackets may then be welded to the interior surface of the housing. Once the mount brackets are welded to the housing, the remainder of the components of the motor-compressor unit, including the orbiting scroll member, the Oldham coupling, and the fixed scroll member, are then assembled to the motor-compressor unit subassembly and the housing through a second end of the housing opposite the first end, followed by welding the top and bottom caps to the housing.
1. A compressor, comprising:
an outer housing;
a motor including a stator having a stack height and a rotor, said motor positioned within said housing;
a crankcase one of directly and indirectly fixedly connected to said housing;
an outboard bearing assembly positioned within said housing;
a drive shaft assembly disposed within said rotor, one end of said drive shaft rotatably supported by said crankcase and an opposite end of said drive shaft rotatably supported by said outboard bearing assembly;
at least one mount bracket secured to an interior surface of said housing, said mount bracket positioned adjacent said outboard bearing assembly such that said mount bracket is much closer to said outboard bearing assembly than said stator stack height; and
at least one fastener connecting together said outboard bearing assembly, said stator and said crankcase to form a stacked assembly comprising said crankcase, stator and outboard bearing assembly, said fastener also extending through said at least one mount bracket whereby said mount bracket rotationally fixes the position of said stator;
said mount bracket being disposed axially exteriorly of said stacked assembly.
2. The compressor of claim 1 , further comprising a plurality of said mount brackets secured to said interior surface of said housing in spaced relationship with respect to one another, and a plurality of said fasteners connecting said outboard bearing assembly and said stator and extending through said outboard bearing assembly and respective said mount brackets.
3. The compressor of claim 2 , wherein said mount brackets are captured directly between said outboard bearing assembly and said fasteners.
4. The compressor of claim 2 , wherein said crankcase includes a body portion with a plurality of legs extending therefrom, said plurality of fasteners secured to respective said legs.
5. The compressor of claim 1 , wherein said compressor is a scroll compressor, further comprising:
a first scroll member fixedly connected to said housing and including a base plate and a first wrap extending from said base plate; and
a second scroll member coupled to said drive shaft for orbital movement, said second scroll member including a second wrap intermeshed with said first wrap.
6. The compressor of claim 1 , wherein said mount bracket is in contact with said outboard bearing assembly.