摘要:
A drive mechanism for delivery of infusion medium has a coil and an armature moveable toward a forward position, in response to the electromagnetic field produced by activation of the coil. A piston is moveable axially within a piston channel to a forward position, in response to movement of the armature to its forward position. The armature and piston are moved toward a retracted position, when the coil is not energized. In the retracted position of the piston, a piston chamber is formed between the piston and a valve member and is filled with infusion medium. As the piston is moved to its forward position, the piston chamber volume is reduced and pressure within the piston chamber increases to a point where the pressure moves the valve member into an open position through an outlet.
摘要:
There are provided a plunger pump and method of controlling discharge of the pump capable of obtaining a desired compression rate, changing a discharge amount with ease without changing a stroke of the plunger and/or the inner diameter of a sliding hole of the plunger, and discharging a constant amount of fluid with accuracy while preventing the fluid from leaking. A plunger pump 1 has a cylinder 2 having an inlet 8 to suck a fluid and an outlet 10 to discharge the sucked fluid, a continuous hole 6 which is formed inside the cylinder 2 and communicated with the outlet 10, a plunger 4 which is inserted in the continuous hole 6 to be slidable and forms a pump chamber 20 to suck and discharge the fluid with the outlet 10 where the pump chamber 20 is formed between the plunger 4 and the outlet 10, and a fluid suction passage which is formed in the cylinder or the plunger, to suck a fluid into the pump chamber, wherein an opening 19 of the fluid suction passage 12 opened to the pump chamber 20 is opened and closed by the plunger 4 sliding inside the continuous hole 6.
摘要:
A linear actuator includes a first yoke part, a second yoke part opposing the first yoke part from a direction perpendicular to the axial direction thereof, an intermediate yoke part forming a first gap and a second gap, a coil disposed within a space delineated by the intermediate yoke part and the second yoke part, which forms a magnetic field between the first yoke part and the intermediate yoke part. The orientation this magnetic field is opposite between the first gap and the second gap, and orientation thereof alternates. The actuator further includes a magnet at one axial-direction end relative to the coil, which generates a fixed magnetic field in the two gaps, directed either from the intermediate yoke part toward the first yoke part or from the first yoke part toward the intermediate yoke part, and an armature disposed that is movable in the axial direction in the first gap and the second gap.
摘要:
The present invention relates to a well pumping unit driven by a linear motor. The well pumping unit includes a slideway support, a linear motor having a motor complex primary and a motor complex secondary, a polished rod chain, a polished rod chain wheel assembly, a bottom support chain wheel, a counterweight chain wheel, a counterweight chain, and a counterweight. The complex secondary, polished rod chain wheel assembly, bottom support chain wheel and counterweight chain wheel are fixed on the slideway support, the complex primary moving along the slideway support. A first end of the polished rod chain is fixed to an upper end of the complex primary and passes over the polished rod chain wheel assembly, with a second end fixed to a polished rod. A lower end of the complex primary is fixed to a first end of the counterweight chain, the counterweight chain passes over the bottom support chain wheel and counterweight chain wheel and is fixed to the counterweight at a second end therof.
摘要:
A reciprocating pump includes a cylinder with a closed interior compartment; a piston assembly which is moveably mounted within the compartment for reciprocating movement; a linear magnetic drive generates a linearly moving magnetic field for moving the piston assembly; a sealing member between the cylinder and the piston assembly to divide the interior compartment of the cylinder into a dispensing chamber and a reservoir chamber; and an energy storage and release media. In certain preferred embodiments, the pumps are hermetic and the energy storage and release media includes a gaseous substance in the reservoir chamber.
摘要:
A resonant electrical generation system includes a resonator, an energy source, and an electrical generator. The resonator provides resonating movement in a resonating element. The resonator can include a mass and spring element. The energy source is operatively coupled to the resonator to maintain resonating movement of the resonating element. The energy source can be a pulsatile linear combustor. The electrical generator is operatively coupled to and driven by the resonator to generate electrical power from the resonating movement.
摘要:
An automated pump including a pulse generator capable of altering the output volume of fluid flow produced by the pump. The present invention is a vibratory pump including a pulse generator connected to a vibratory generator on the pump that is used to selectively control the amount of vibration created by the vibration generator. By increasing or decreasing the amount of vibrations created by the vibration generator, an operator can control the fluid flow output of the pump to fit the desired use for the pump.
摘要:
A reciprocating fluid pump includes a drive section and a pump section. The drive section has a pair of coils which may be energized to cause displacement of a reciprocating assembly. Each coil is a reluctance gap arrangement in which a magnetic circuit is interrupted by a gap towards which an armature of the reciprocating assembly is drawn when energizing current is applied to the coil. The reciprocating assembly includes an element which is extended into and retracted from a pump chamber during its reciprocating motion, causing fluid to be drawn into and expelled from the pump chamber. The pump is particularly well suited for use in cyclic pumping applications, such as internal combustion engine fuel injection. Cycle times in such applications may be reduced by appropriate control of the current waveforms applied to the coils.
摘要:
A chemical injection pump for injecting chemicals into subsea system at depths up to 10,000 feet is described which uses a minimum of moving parts by employing an actuator, for instance a solenoid, to power a double acting actuator rod and plungers thereon. The pump would generate low pressures and low fluid volumes, but be more durable and reliable than conventional rotating pumps operating under subsea conditions.
摘要:
A reciprocating pump includes a chamber, a reciprocating member arranged to induct a fluid into the chamber and discharge the fluid from the chamber to a delivery side of the pump, and a piezoelectric element attached to the pump and arranged to detect pressure fluctuations on the delivery side of the pump so as to sense any abnormality in the inducting and discharging of fluid.