| CPC F02C 7/232 (2013.01) [F02C 7/236 (2013.01); F02C 9/24 (2013.01); F02C 9/263 (2013.01); F02C 9/28 (2013.01); F05D 2220/32 (2013.01); F05D 2260/606 (2013.01)] | 13 Claims |
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1. A fluid delivery system, comprising:
a main pump disposed in a primary fluid line configured to receive a low pressure fluid on a low pressure side of the primary fluid line and output a high pressure fluid to a high pressure side of the primary fluid line to provide a flow from a fluid source to a fluid destination via the primary fluid line; and
an interconnected valve system disposed in the primary fluid line configured to control the flow flowing through the primary fluid line, the interconnected valve system comprising:
a variable metering valve disposed in the high pressure side of the primary fluid line downstream of the main pump, the variable metering valve configured to receive the flow from the main pump at a first pressure and meter the flow to the fluid destination at a second pressure, wherein the variable metering valve comprises a first side and a second side opposite to the first side;
a first controllable valve disposed in the primary fluid line downstream of the main pump and parallel to the variable metering valve, the first controllable valve configured to control a position of the variable metering valve, wherein a first controllable pressure line fluidly connects between the first controllable valve and the first side of the variable metering valve to supply a first pressure reference to the first side of the variable metering valve, a second controllable pressure line fluidly connects between the first controllable valve and the second side of the variable metering valve to supply a second pressure reference, and the first pressure reference counteracts the second pressure reference;
a non-variable valve disposed in the primary fluid line downstream of the variable metering valve, the non-variable valve configured to selectively allow the flow flowing from the variable metering valve at the second pressure to the fluid destination;
a bypass valve disposed in the high pressure side of the primary fluid line downstream of the main pump and parallel to the variable metering valve such that the bypass valve and the variable metering valve are both fluidly connected to an outlet of the main pump to receive the flow from the main pump at the first pressure, the bypass valve configured to control a state of the non-variable valve and configured to bypass a portion of the flow at the first pressure from the high pressure side of the primary fluid line back to the low pressure side of the primary fluid line, and wherein the bypass valve comprises a first side and a second side opposite to the first side, and the primary fluid line fluidly connects to the bypass valve at the first side of the bypass valve to supply the flow at the first pressure to the first side of the bypass valve;
a second controllable valve disposed in the low pressure side of the primary fluid line fluidly connected to the variable metering valve and the bypass valve via a controllable bypass pressure line, the second controllable valve configured to control a position of the bypass valve,
wherein the controllable bypass pressure line is fluidly connected to the second side of the bypass valve to supply a third pressure reference, and the third pressure reference counteracts the flow at the first pressure supplied to the first side of the bypass valve by the primary fluid line, and wherein the controllable bypass pressure line fluidly connects to the low pressure side of the primary fluid line through the variable metering valve and the second controllable valve.
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