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US 6,305,914 B1Granted
Counterweight of reduced size
AssigneeScroll Technologies
InventorAlexander Lifson
Life of this patent
Estimating the term…
Abstract
Counterweight size is reduced by removing material from an electric motor rotor for a machine, such as a compressor. The material is removed asymmetrically with respect to shaft centerline to provide maximum benefit. Counterweight size reduction results in decrease of compressor dimensional envelope and weight.
Claims11
A scroll compressor comprising:
- a first scroll member having a base and a generally spiral wrap extending from said base;
- a second scroll member having a base and a generally spiral wrap extending from said base, said wrap of said first and second scroll members interfitting to define compression chambers;
- a shaft operably connected to cause said second scroll member to orbit relative to said first scroll member;
- an electric motor for driving said shaft about a rotational axis, said electric motor incorporating a stator and a rotor, said rotor being fixed to rotate with said shaft;
- and
- material removed from a portion of said rotor to assist in balancing forces during orbital movement of said orbiting scroll member, said removed material being non-symmetrical about a rotational axis of said rotor, and said removed material being removed as holes each formed entirely within a 90 degree circumferential section of said rotor.
3 more elements
A scroll compressor comprising:
- a first scroll member having a base and a generally spiral wrap extending from said base;
- a second scroll member having a base and a generally spiral wrap extending from said base, said wrap of said first and second scroll members interfitting to define compression chambers;
- a shaft operably connected to cause said second scroll member to orbit relative to said first scroll member;
- an electric motor for driving said shaft about a rotational axis, said electric motor incorporating a stator and a rotor, said rotor being fixed to rotate with said shaft;
- and
- material removed from a portion of said rotor to assist in balancing forces during orbital movement of said orbiting scroll member, said removed material being non-symmetrical about said rotational axis, said removed material being formed by a plurality of holes, and not being symmetric about said rotational axis, and said holes extending generally parallel to said rotational axis and said holes each formed entirely within a 90 degree circumferential section of said rotor.
3 more elements
A compressor comprising:
- a compressor pump unit;
- a shaft operably connected to drive said compressor pump unit;
- an electric motor for driving said shaft about a rotational axis, said electric motor incorporating a stator and a rotor, said rotor being fixed to rotate with said shaft;
- and
- material removed from a portion of said rotor to assist imbalancing forces during operation of said compressor pump unit, said removed material be non-symmetrical about said rotational axis of said rotor, said removed material being provided by a plurality of holes each formed within a 90 degree circumferential section of said rotor.
2 more elements
Dependencies are inferred from the claim text.