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Title: Dual capacity reciprocating compressor

Abstract

A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.

Inventors:
 [1]
  1. (Wilkinsburg, PA)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865222
Patent Number(s):
4479419
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
dual; capacity; reciprocating; compressor; multi-cylinder; 10; particularly; useful; connection; northern; climate; heat; pumps; capacities; available; accordance; reversing; motor; 16; rotation; provided; eccentric; 38; crank; 34; fraction; connecting; rods; arranged; opposite; positions; 180; degree; apart; throw; normal; maximum; value; pistons; pump; shaft; direction; moves; circumferential; position; overall; zero; 24; 30; ride; 36; rate; rotational; clearance; volume; piston; mode; operation; rotational direction; connecting rod; connecting rods; opposite direction; heat pump; particularly useful; reciprocating compressor; circumferential position; opposite positions; dual capacity; maximum value; heat pumps; opposite position; /92/417/

Citation Formats

Wolfe, Robert W. Dual capacity reciprocating compressor. United States: N. p., 1984. Web.
Wolfe, Robert W. Dual capacity reciprocating compressor. United States.
Wolfe, Robert W. Sun . "Dual capacity reciprocating compressor". United States. https://www.osti.gov/servlets/purl/865222.
@article{osti_865222,
title = {Dual capacity reciprocating compressor},
author = {Wolfe, Robert W.},
abstractNote = {A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Patent:

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