Hydraulic drive system for cryogenic pump
AssigneeCaterpillar Inc.
InventorsAdrienne M. Brasche, Cory A. Brown, Sunil J. Bean
Life of this patent
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Abstract
A drive system for a cryogenic pump is provided including a spool housing having a plurality of valves disposed therein about a pump axis and a tappet housing including a plurality of tappet bores, each tappet bore in communication with a respective one of the plurality of valves. A collection cavity collects hydraulic fluid from the tappet bores. A pump flange includes a fluid inlet and a fluid outlet. An inlet manifold directs hydraulic fluid received through the fluid inlet to each of the plurality of valves. An outlet manifold directs hydraulic fluid from each of the valves and the collection cavity to the fluid outlet.
Claims20
A cryogenic pump for pumping liquid from a cryogenic tank comprising:
- a pump assembly adapted to be submersed within a cryogenic tank;
- and
- a hydraulic drive assembly for driving the pump assembly to pump liquid;
- wherein the hydraulic drive assembly further includes:
- a spool housing having a plurality of valves disposed therein about a pump axis;
- a tappet housing including a plurality of tappet bores, each tappet bore in communication with a respective one of the plurality of valves;
- a collection cavity for collecting hydraulic fluid from the tappet bores;
- a pump flange for mounting the cryogenic pump to a cryogenic tank, the pump flange including a fluid inlet for receiving hydraulic fluid and a fluid outlet for directing hydraulic fluid out of the cryogenic pump;
- an inlet manifold disposed at least partially in the spool housing for directing hydraulic fluid received through the fluid inlet to each of the plurality of valves;
- and
- an outlet manifold disposed at least partially in the spool housing for directing hydraulic fluid from each of the valves and the collection cavity to the fluid outlet.
A drive system for a cryogenic pump comprising:
- a spool housing having a plurality of valves disposed therein about a pump axis;
- a tappet housing including a plurality of tappet bores, each tappet bore in communication with a respective one of the plurality of valves;
- a collection cavity for collecting hydraulic fluid from the tappet bores;
- a pump flange for mounting the cryogenic pump to a cryogenic tank, the pump flange including a fluid inlet for receiving hydraulic fluid and a fluid outlet for directing hydraulic fluid out of the cryogenic pump;
- an inlet manifold disposed at least partially in the spool housing for directing hydraulic fluid received through the fluid inlet to each of the plurality of valves;
- and
- an outlet manifold disposed at least partially in the spool housing for directing hydraulic fluid from each of the valves and the collection cavity to the fluid outlet.
A power system for a machine comprising:
- a cryogenic tank for storing a cryogenic fluid;
- an engine operatively associated with the cryogenic tank for receiving the cryogenic fluid;
- a hydraulic system including a hydraulic pump and a hydraulic reservoir;
- a cryogenic pump arranged in the cryogenic tank, the cryogenic pump having a pump assembly submersed within the cryogenic tank and a hydraulic drive assembly for driving the pump assembly to pump the cryogenic liquid, wherein the hydraulic drive assembly further includes:
- a spool housing having a plurality of valves disposed therein arranged about a pump axis;
- a tappet housing including a plurality of tappet bores, each tappet bore in communication with a respective one of the plurality of valves;
- a collection cavity for collecting hydraulic fluid from the tappet bores;
- a pump flange for mounting the cryogenic pump to the cryogenic tank, the pump flange including a fluid inlet in communication with the hydraulic pump and a fluid outlet in communication with the hydraulic reservoir;
- a center passage disposed at least partially in a space in the spool housing that is circumscribed by the plurality of valves;
- an annular passage disposed at least partially in the spool housing;
- an inlet manifold for directing hydraulic fluid received through the fluid inlet to each of the plurality of valves, the inlet manifold including one of the center passage and the annular passage;
- and
- an outlet manifold for directing hydraulic fluid from each of the valves and the collection cavity to the fluid outlet, the outlet manifold including the other of the center passage and the annular passage.
Dependencies are inferred from the claim text.