An air compressor pump is provided, including a crankcase with an opening and a crankshaft extending out of the opening; a cover disposed over the opening in the crankcase; and a condensing chamber formed between the crankcase and the cover.

The present invention describes a reciprocating compressor, comprising: an assembly block (10); a rotating shaft (20) comprising at least one inner axial channel (21), said inner axial channel (21) connected to at least one inner radial channel (22a, 22b) or to a cam (23); the cam (23) is associated with a connecting rod (24), and the connecting rod (24) is associated with a movable piston (25) within a compression cylinder (26); and an oil pump (C), comprising: an axial flow electric motor comprising a rotor (30), with magnets (31), and a stator (40) with coils (41); wherein the rotor (30) and the stator (40) are fixed to the shaft (20) and to the assembly block (10), respectively, by means of bearings or fixing arrangements.

A refrigerant compressor for a refrigeration system comprises a common housing, a compressor unit arranged in the common housing, a mechanical compressor drive unit for the compressor unit, arranged in a drive chamber, a lubricant bath forming in the drive chamber, an intake duct that extends in a manner separated from the drive chamber and through which the compressor unit draws in by suction refrigerant that is to be compressed. The intake duct and the drive chamber are connected by a gas equaliser duct, which allows a permanent equalisation of gas, and which has on one side an opening on the drive chamber side and on the other an opening on the intake side, and of which the duct length between the openings corresponds to at least twice an equivalent duct diameter, in particular a smallest equivalent duct diameter, of the gas equaliser duct.

A linear compressor of the present invention comprises: a shell having a suction portion; a cylinder disposed in the shell and forming a compression space for a refrigerant; a piston arranged to axially reciprocate in the cylinder; and a spring device for inducing a resonant motion of the piston, wherein the spring device comprises a spring, a first supporter to which one side of the spring is connected and which moves together with the piston, and a second supporter to which the other side of the spring is connected, and each of the supporters has a coupling groove for fitting the spring therein.

A skid for supporting a reciprocating pump assembly, the reciprocating pump assembly including a power end frame assembly having a pair of end plate segments and a plurality of middle plate segments disposed between the end plate segments. The end plate segments each have at least a pair of feet and the middle plate segments each having at least one foot. The skid includes a base and a plurality of pads extending from the base. At least a portion of the plurality of pads correspond to the end plate segment feet and at least another portion of the plurality of pads correspond to the at least one foot of each middle plate segment.

A gearbox is coupled to a power end housing of a reciprocating pump, where the gearbox includes at least one support member having a first end securely affixed to the gearbox, and the at least one support member having a second end securely affixed to an immobile part of the reciprocating pump for supporting the gearbox and resisting movement of the gearbox relative to the reciprocating pump.

A gas transport and pressurization system, including a static valve, a compartment concentrically arranged around the static valve, a dynamic valve axially displaceable relative to the static valve, and a crankshaft connected to the dynamic valve, wherein gas from a ground gas well flows through the compartment, the dynamic valve, and the static valve to a gas outlet.

An air compressor improves the dustproof performance of an intake path to a crankcase. The air compressor includes a compression assembly that reciprocates a piston in a cylinder to produce compressed air, a crankcase accommodating the compression assembly and having an inner inlet to allow outside air to be drawn, a filter located in the crankcase and covering the inner inlet from outside, a filter cover having an outer inlet and covering the filter from outside, and a dust cover covering the filter cover from outside, covering the outer inlet, and including an outer circumferential portion. The outer circumference portion and the filter cover have a space to draw outside air between the outer circumference portion and the filter cover.

A crankcase heating control system for a heat pump system includes a data receiving module and a power control module. The data receiving module receives data indicative of a temperature of a compressor of the heat pump system, data indicative of an ambient temperature, and data indicative of a current date and a current time. The power control module selectively applies power to a heater of a crankcase of the compressor and selectively disables the heater based on the temperature of the compressor, the ambient temperature, the current date, and the current time.

A method and apparatus to reduce the intrusion of ambient air into an open-crankcase compressor. The method employs recycle control to reduce the magnitude of vacuum inside the compressor relative to ambient air pressure, and thereby eliminate the intrusion of said ambient air into said compressor.