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US 2021/0140415 A1Published application
Variable stroke pump
AssigneeCw Holding Ltd
InventorsJianke Wang, Leslie Wise, Xiaonan Zhai, Ronald G. Embry, Milton Anderson
Life of this patent
Estimating the term…
Abstract
A variable stroke high pressure pump is disclosed. The pump uses a wobble plate design with dynamically variable tilt to provide continuous adjustment of pump stroke length and output. Dynamically variable tilt is accomplished using a linearly actuated tilt thruster rotationally coupled to the drive shaft to maintain a selected tilt of the wobble plate through the rotation of the wobble plate.
Claims22
A pump, comprising:
- a drive shaft coupled to a drive;
- a wobble plate attached to the drive shaft by a swivel mount with a wobble plate key extending radially outward from the swivel mount;
- a plurality of displacement rods, each having a first end and a second end, with the first end of each displacement rod disposed against a first surface of the wobble plate and the second end of each displacement rod connected with a plunger;
- and
- a tilt actuator assembly disposed around the drive shaft, the tilt actuator assembly comprising a slider having an interior surface with a slot formed therein and a thruster coupled to the slider and extending toward a second surface of the wobble plate opposite the first surface, the tilt actuator assembly further comprising a key extending radially outward from the drive shaft and mated with the slot and a linear actuator slidably disposed against the slider.
2 more elements
A pump, comprising:
- a drive shaft coupled to a drive;
- a wobble plate attached to the drive shaft by a ball-shaped swivel mount with a wobble plate key extending radially outward from the swivel mount;
- a plurality of displacement rods, each having a first end and a second end, with the first end of each displacement rod disposed against a first surface of the wobble plate and the second end of each displacement rod connected with a plunger;
- a thrust bearing between each displacement rod and the wobble plate;
- a tilt actuator assembly disposed around the drive shaft, the tilt actuator assembly comprising a slider with a slot formed therein and a thruster extending toward a second surface of the wobble plate opposite the first surface;
- a key extending radially outward from the drive shaft and mated with the slot;
- and
- a rack-pinion actuator slidably disposed against the slider.
5 more elements
The pump of claim 16, wherein the fluid head comprises:
- a module assembly for each displacement rod, each module assembly comprising:
- a suction valve cartridge;
- a discharge valve cartridge;
- and
- a discharge conduit, and;
- a discharge manifold, wherein each discharge conduit is connected to the discharge manifold.
3 more elements
A pump, comprising:
- a drive shaft coupled to a drive;
- a wobble plate attached to the drive shaft by a ball-shaped swivel mount with a wobble plate key extending radially outward from the swivel mount;
- a plurality of displacement rods, each having a first end and a second end, with the first end of each displacement rod disposed against a first surface of the wobble plate and the second end of each displacement rod connected with a plunger;
- a thrust bearing between each displacement rod and the wobble plate;
- a tilt actuator assembly disposed around the drive shaft, the tilt actuator assembly comprising a slider with an interior surface that has a slot formed therein and a thruster extending toward a second surface of the wobble plate opposite the first surface, the slider attached to the drive shaft by a guide ring;
- a key extending radially outward from the drive shaft and the guide ring, and mated with the slot;
- and
- a hydraulic actuator slidably disposed against the slider.
5 more elements
Dependencies are inferred from the claim text.