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US 10,415,563 B2Granted
Pumping system, vibration limiting device, and method
AssigneeCaterpillar Inc.
InventorsZachary Robinson, Thomas Brosowske
Life of this patent
Estimating the term…
Abstract
A mechanism for limiting vibration amplitudes in a pumping system includes a plurality of pendulum absorbers coupled with a carrier and each having a pivoting range. The pendulum absorbers each further include a first and a second contact surface that contacts an outer peripheral surface of the carrier at limit stop positions, and each having a shape that is conforming with a shape of the outer peripheral surface. The pumping system may be used for pumping liquid nitrogen.
Claims19
A pumping system comprising:
- an engine,
- a transmission coupled with the engine;
- a pump including a pump shaft and a plurality of pumping elements structured to reciprocate to transition a fluid between a pump inlet and a pump outlet;
- a driveline coupled between the transmission and the pump shaft;
- a vibration-limiting mechanism coupled with the driveline between the transmission and the pump, and including a carrier fixed to rotate with the driveline, and a plurality of pendulum absorbers coupled to the carrier, the carrier including an outer peripheral surface extending circumferentially about a longitudinal center axis of the carrier;
- a gearbox coupled between the transmission and the pump and including an input gear coupled with the driveline and structured to rotate at a speed of rotation of the driveline, and an output gear coupled with the pump shaft and structured to rotate the pump shaft at a speed of rotation that is different from the speed of rotation of the driveline;
- each pendulum absorber has a pivoting range and is pivotable therethrough about a separate pivot axis in response to torsional vibrations of the driveline;
- and
- each pendulum absorber includes a first contact surface that contacts the outer peripheral surface at a respective first limit stop position, and a second contact surface that contacts the outer peripheral surface at a respective second limit stop position, each first contact surface and second contact surface having a shape conforming with a shape of the outer peripheral surface.
6 more elements
A mechanism for limiting vibration amplitudes in a rotary machine system comprising:
- a carrier including an outer peripheral surface extending circumferentially about a longitudinal center axis of the carrier, and a mounting surface structured for mounting the mechanism to a driveline in the rotary machine system;
- a plurality of pendulum absorbers coupled with the carrier and having a circumferential distribution about the longitudinal center axis, and each of the plurality of pendulum absorbers being pivotable about a separate pivot axis having an orientation that is parallel to an orientation of the longitudinal center axis;
- the plurality of pendulum absorbers each having a pivoting range and being movable in the pivoting range in response to torsional vibrations of the driveline transmitted to the carrier, and each of the plurality of pendulum absorbers further including a first contact surface that contacts the outer peripheral surface at a first limit stop position of the pivoting range, and a second contact surface that contacts the outer peripheral surface at a second limit stop position of the pivoting range, and each of the first contact surface and the second contact surface having a shape that is conforming with a shape of the outer peripheral surface.
A method of operating a pumping system comprising:
- transmitting torque from a rotating driveline to a pump shaft of a pump to cause a plurality of pistons of the pump to reciprocate;
- transitioning a fluid between a pump inlet and a pump outlet by way of the reciprocation of the plurality of pistons;
- limiting an amplitude of torsional vibrations transmitted from the pump to the driveline by way of a vibration-limiting mechanism coupled to the driveline between the pump and an engine operating to rotate the driveline, the vibration-limiting mechanism including a carrier having an outer peripheral surface extending circumferentially about a longitudinal center axis, and a plurality of pendulum absorbers each having a first contact surface and a second contact surface conforming with a shave of the outer peripheral surface and each of the plurality of pendulum absorbers being coupled to the carrier so as to be pivotable through a pivoting range in response to torsional vibrations, such that the first contact surface contacts the outer peripheral surface at a first limit stop position, and the second contact surface contacts the outer peripheral surface at a second limit stop position;
- and
- the transmitting further including transmitting the torque by way of a gearbox such that a speed of rotation of the pump shaft is different from a speed of rotation of the driveline.
2 more elements
Dependencies are inferred from the claim text.