| 摘要 |
A positive displacement reciprocating compressor for compression of natural gas. The compressor includes at least one pair of coaxial bulkheads, each bulkhead having a gas cylinder coupled thereto, and one or more a scissor drive assemblies for driving piston rams into and out of the gas cylinders to compress gas. The scissor drive assembly of the compressor includes one or more piston rams having a piston head attached thereto and movable into and out of each gas cylinder via reciprocating movement of a linkage arm assembly, coupling the piston rams to a rotatable drive shaft. The compressor can be used for compressing natural gas for use as a fuel for vehicles, appliances, generators, or the like. |
| 主权项 |
1. An improved gas compressor for compressing natural gas from a first pressure to a second pressure higher than the first pressure, the compressor comprising:
a mounting frame; a pair of coaxial gas cylinders displaced along a longitudinal axis and positioned 180 degrees from each other, the gas cylinders being independently mounted to the mounting frame: and a scissor drive assembly including—
a first piston ram positioned in a fluid tight configuration in a first gas cylinder of the pair of coaxial gas cylinders, and a second piston ram positioned in a fluid tight configuration in a second gas cylinder of the pair of coaxial gas cylinders, the first and second piston rams being movable within the first and second gas cylinders, respectively, to define a variable internal volume of each gas cylinder;an externally mounted drive shaft; andan externally mounted linkage arm assembly comprising at least four linkage arms, wherein a first end of first and second linkage arms of the at least four linkage arms is pivotably coupled to the drive shaft via a first drive block, and a first end of third and fourth linkage arms of the at least four linkage arms is pivotably coupled to the drive shaft via a second drive block, and wherein a second opposite end of the first and third linkage arms is pivotably coupled to the first piston ram via a first piston ram block, and wherein a second opposite end of the second and fourth linkage arms is pivotably coupled to the second piston ram via a second piston ram block, andwherein the linkage arm assembly is shiftable, via rotation of the drive shaft, between a folded configuration in which the first and second piston rams are substantially withdrawn from or positioned at a first end of the first and second gas cylinders, respectively, such that the variable internal volume of each gas cylinder is a first initial volume, and an expanded configuration in which the first and second piston rams extend into the first and second gas cylinders, respectively, such that the variable internal volume of each gas cylinder is less than the first initial volume, thereby compressing a gas present within each gas cylinder. |
