Balancers for various reciprocating machines using rotating balance weights
US4712436A · kind A · utility
Inventor
Key dates
| Filing date | Oct 2, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2183
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary crankshaft has multiple cranks. Each crank drives a reciprocating member in a cylinder or guideway via a con rod. Main counterweights are attached to the crankshaft and rotate therewith. Two contraweights rotate in the opposite direction from the crankshaft and at the same RPM as the crankshaft. The two contraweights are generally rotatably mounted on the crankshaft, coaxial therewith, and near each end of the crankshaft. The two contraweights are driven from the crankshaft by toothed gearing. The two contraweights plus the main counterweights combine forces so as to counterbalance the primary reciprocating inertia forces of a plurality of said reciprocating members. By proper adjustment of the size and angular location of both the main counterweights and the two contraweights, it is possible to obtain near perfect primary balance under any or all of the following conditions: PA0 (a) Any number of cranks. PA0 (b) Non equal reciprocating weights. PA0 (c) Non equal crank throws. PA0 (d) Non equal angular spacing of cranks and most any crank angle sequence. PA0 (e) Non equal axial spacing of cranks along the length of the crankshaft. PA0 (f) Cylinders may radiate outward at o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.