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US 10,072,676 B2Granted
System to pump fluid and control thereof
AssigneeProject Phoenix, LLC
InventorThomas Afshari
Life of this patent
Estimating the term…
Abstract
A fluid system includes a variable-speed and/or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and/or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump.
Claims132
A hydraulic system comprising:
- a hydraulic pump to provide hydraulic fluid to a hydraulic actuator having first and second ports, the hydraulic pump including,
- at least one electric motor, the at least one electric motor being at least one of a variable-speed and a variable-torque motor, and
- a gear assembly to be driven by the at least one electric motor such that fluid is transferred from an inlet port of the hydraulic pump to an outlet port of the hydraulic pump;
- a first control valve assembly including,
- a first control valve disposed on a side of the inlet port, the first control valve in fluid communication with the first port and the inlet port, and
- a first control valve actuator to operate the first control valve;
- a second control valve assembly including,
- a second control valve disposed on a side of the outlet port, the second control valve in fluid communication with the second port and the outlet port, and
- a second control valve actuator to operate the second control valve;
- and
- a controller that establishes at least one of a speed and a torque of the at least one electric motor so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point and concurrently establishes an opening of at least one of the first and second control valves in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one electric motor is controlled to maintain the pressure to the pressure set point and the at least one of the first and second control valves is controlled to maintain the flow to the flow set point.
9 more elements
A hydraulic system comprising:
- a hydraulic pump to provide hydraulic fluid to a hydraulic actuator having first and second ports, the hydraulic pump including,
- at least one electric motor, the at least one electric motor being at least one of a variable-speed and a variable-torque motor, and
- a gear assembly to be driven by the at least one electric motor such that fluid is transferred from an inlet port of the hydraulic pump to an outlet port of the hydraulic pump;
- a first control valve assembly including,
- a first control valve disposed on a side of the inlet port, the first control valve in fluid communication with the first port and the inlet port, and
- a first control valve actuator to operate the first control valve;
- a second control valve assembly including,
- a second control valve disposed on a side of the outlet port, the second control valve in fluid communication with the second port and the outlet port, and
- a second control valve actuator to operate the second control valve;
- and
- a controller that establishes at least one of a speed and a torque of the at least one electric motor so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point and concurrently establishes an opening of at least one of the first and second control valves in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one electric motor is controlled to maintain the pressure to the pressure set point and the at least one of the first and second control valves is controlled to maintain the pressure to the pressure set point.
9 more elements
A hydraulic system comprising:
- a hydraulic pump to provide hydraulic fluid to a hydraulic actuator having first and second ports, the hydraulic pump including,
- at least one electric motor, the at least one electric motor being at least one of a variable-speed and a variable-torque motor, and
- a gear assembly to be driven by the at least one electric motor such that fluid is transferred from an inlet port of the hydraulic pump to an outlet port of the hydraulic pump;
- a first control valve assembly including,
- a first control valve disposed on a side of the inlet port, the first control valve in fluid communication with the first port and the inlet port, and
- a first control valve actuator to operate the first control valve;
- a second control valve assembly including,
- a second control valve disposed on a side of the outlet port, the second control valve in fluid communication with the second port and the outlet port, and
- a second control valve actuator to operate the second control valve;
- and
- a controller that establishes at least one of a speed and a torque of the at least one electric motor so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point and concurrently establishes an opening of at least one of the first and second control valves in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one electric motor is controlled to maintain the flow to the flow set point and the at least one of the first and second control valves is controlled to maintain the flow to the flow set point.
9 more elements
A hydraulic system comprising:
- a hydraulic pump to provide hydraulic fluid to a hydraulic actuator having first and second ports, the hydraulic pump including,
- at least one electric motor, the at least one electric motor being at least one of a variable-speed and a variable-torque motor, and
- a gear assembly to be driven by the at least one electric motor such that fluid is transferred from an inlet port of the hydraulic pump to an outlet port of the hydraulic pump;
- a first control valve assembly including,
- a first control valve disposed on a side of the inlet port, the first control valve in fluid communication with the first port and the inlet port, and
- a first control valve actuator to operate the first control valve;
- a second control valve assembly including,
- a second control valve disposed on a side of the outlet port, the second control valve in fluid communication with the second port and the outlet port, and
- a second control valve actuator to operate the second control valve;
- and
- a controller that establishes at least one of a speed and a torque of the at least one electric motor so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point and concurrently establishes an opening of at least one of the first and second control valves in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least electric one motor is controlled to maintain the flow to the flow set point and the at least one of the first and second control valves is controlled to maintain the pressure to the pressure set point.
9 more elements
A method for controlling a fluid flow in a hydraulic system, the hydraulic system including a hydraulic pump and a control valve throttleable between a closed position and an open position, the hydraulic pump to provide hydraulic fluid to a hydraulic actuator that controls a load, the hydraulic pump including at least one prime mover that is an electric motor and a fluid displacement assembly to be driven by the at least one prime mover, the method comprising:
- initiating at least one of a variable-speed and variable-torque operation of the hydraulic pump;
- establishing, in response to a change in demand of at least one of a fluid flow and pressure in the hydraulic system, at least one of a speed and a torque of the at least one prime mover so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point;
- and
- concurrently establishing, with the establishing of the at least one of the speed and the torque of the at least one prime mover, an opening of the control valve in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one prime mover maintains the pressure to the pressure set point and the control valve maintains the flow to the flow set point.
2 more elements
A method for controlling a fluid flow in a hydraulic system, the hydraulic system including a hydraulic pump and a control valve throttleable between a closed position and an open position, the hydraulic pump to provide hydraulic fluid to a hydraulic actuator that controls a load, the hydraulic pump including at least one prime mover that is an electric motor and a fluid displacement assembly to be driven by the at least one prime mover, the method comprising:
- initiating at least one of a variable-speed and variable-torque operation of the hydraulic pump;
- establishing, in response to a change in demand of at least one of a fluid flow and pressure in the hydraulic system, at least one of a speed and a torque of the at least one prime mover so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point;
- and
- concurrently establishing, with the establishing of the at least one of the speed and the torque of the at least one prime mover, an opening of the control valve in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one prime mover maintains the pressure to the pressure set point and the control valve maintains the pressure to the pressure set point.
2 more elements
A method for controlling a fluid flow in a hydraulic system, the hydraulic system including a hydraulic pump and a control valve throttleable between a closed position and an open position, the hydraulic pump to provide hydraulic fluid to a hydraulic actuator that controls a load, the hydraulic pump including at least one prime mover that is an electric motor and a fluid displacement assembly to be driven by the at least one prime mover, the method comprising:
- initiating at least one of a variable-speed and variable-torque operation of the hydraulic pump;
- establishing, in response to a change in demand of at least one of a fluid flow and pressure in the hydraulic system, at least one of a speed and a torque of the at least one prime mover so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point;
- and
- concurrently establishing, with the establishing of the at least one of the speed and the torque of the at least one prime mover, an opening of the control valve in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one prime mover maintains the flow to the flow set point and the control valve maintains the flow to the flow set point.
2 more elements
A method for controlling a fluid flow in a hydraulic system, the hydraulic system including a hydraulic pump and a control valve throttleable between a closed position and an open position, the hydraulic pump to provide hydraulic fluid to a hydraulic actuator that controls a load, the hydraulic pump including at least one prime mover that is an electric motor and a fluid displacement assembly to be driven by the at least one prime mover, the method comprising:
- initiating at least one of a variable-speed and variable-torque operation of the hydraulic pump;
- establishing, in response to a change in demand of at least one of a fluid flow and pressure in the hydraulic system, at least one of a speed and a torque of the at least one prime mover so as to maintain at least one of a flow in the hydraulic system at a flow set point and a pressure in the hydraulic system at a pressure set point;
- and
- concurrently establishing, with the establishing of the at least one of the speed and the torque of the at least one prime mover, an opening of the control valve in open and close directions so as to maintain at least one of the flow in the hydraulic system at the flow set point and the pressure in the hydraulic system at the pressure set point,
- wherein the at least one prime mover maintains the flow to the flow set point and the control valve maintains the pressure to the pressure set point.
2 more elements
A fluid pumping system comprising:
- a pump to provide fluid to an actuator that is operated by the fluid, the pump including,
- at least one fluid driver, each fluid driver including,
- at least one of a variable-speed and a variable-torque prime mover that is an electric motor, and
- a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from an inlet port of the pump to an outlet port of the pump;
- a proportional control valve assembly, the proportional control valve assembly including,
- a proportional control valve disposed in the fluid pumping system such that the proportional control valve is in fluid communication with the pump, and
- a valve actuator to operate the proportional control valve;
- and
- a controller that establishes at least one of a speed and a torque of each prime mover of the at least one fluid driver so as to maintain at least one of a flow in the fluid pumping system to a flow set point and a pressure in the fluid pumping system to a pressure set point, and concurrently establishes an opening of the proportional control valve in open and close directions so as to maintain at least one of the flow in the fluid pumping system to the flow set point and the pressure in the fluid pumping system to the pressure set point,
- wherein each prime mover of the at least one fluid driver is controlled to maintain the pressure to the pressure set point and the proportional control valve is controlled to maintain the flow to the flow set point.
7 more elements
A fluid pumping system comprising:
- a pump to provide fluid to an actuator that is operated by the fluid, the pump including,
- at least one fluid driver, each fluid driver including,
- at least one of a variable-speed and a variable-torque prime mover that is an electric motor, and
- a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from an inlet port of the pump to an outlet port of the pump;
- a proportional control valve assembly, the proportional control valve assembly including,
- a proportional control valve disposed in the fluid pumping system such that the proportional control valve is in fluid communication with the pump, and
- a valve actuator to operate the proportional control valve;
- and
- a controller that establishes at least one of a speed and a torque of each prime mover of the at least one fluid driver so as to maintain at least one of a flow in the fluid pumping system to a flow set point and a pressure in the fluid pumping system to a pressure set point, and concurrently establishes an opening of the proportional control valve in open and close directions so as to maintain at least one of the flow in the fluid pumping system to the flow set point and the pressure in the fluid pumping system to the pressure set point,
- wherein each prime mover of the at least one fluid driver is controlled to maintain the pressure to the pressure set point and the proportional control valve is controlled to maintain the pressure to the pressure set point.
7 more elements
A fluid pumping system comprising:
- a pump to provide fluid to an actuator that is operated by the fluid, the pump including,
- at least one fluid driver, each fluid driver including,
- at least one of a variable-speed and a variable-torque prime mover that is an electric motor, and
- a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from an inlet port of the pump to an outlet port of the pump;
- a proportional control valve assembly, the proportional control valve assembly including,
- a proportional control valve disposed in the fluid pumping system such that the proportional control valve is in fluid communication with the pump, and
- a valve actuator to operate the proportional control valve;
- and
- a controller that establishes at least one of a speed and a torque of each prime mover of the at least one fluid driver so as to maintain at least one of a flow in the fluid pumping system to a flow set point and a pressure in the fluid pumping system to a pressure set point, and concurrently establishes an opening of the proportional control valve in open and close directions so as to maintain at least one of the flow in the fluid pumping system to the flow set point and the pressure in the fluid pumping system to the pressure set point,
- wherein each prime mover of the at least one fluid driver is controlled to maintain the flow to the flow set point and the proportional control valve is controlled to maintain the flow to the flow set point.
7 more elements
A fluid pumping system comprising:
- a pump to provide fluid to an actuator that is operated by the fluid, the pump including,
- at least one fluid driver, each fluid driver including,
- at least one of a variable-speed and a variable-torque prime mover that is an electric motor, and
- a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from an inlet port of the pump to an outlet port of the pump;
- a proportional control valve assembly, the proportional control valve assembly including,
- a proportional control valve disposed in the fluid pumping system such that the proportional control valve is in fluid communication with the pump, and
- a valve actuator to operate the proportional control valve;
- and
- a controller that establishes at least one of a speed and a torque of each prime mover of the at least one fluid driver so as to maintain at least one of a flow in the fluid pumping system to a flow set point and a pressure in the fluid pumping system to a pressure set point, and concurrently establishes an opening of the proportional control valve in open and close directions so as to maintain at least one of the flow in the fluid pumping system to the flow set point and the pressure in the fluid pumping system to the pressure set point,
- wherein each prime mover of the at least one fluid driver is controlled to maintain the flow to the flow set point and the proportional control valve is controlled to maintain the pressure to the pressure set point.
7 more elements
Dependencies are inferred from the claim text.