US20230021491A1 - Displacement pump pressure feedback control and method of control - Google Patents
Displacement pump pressure feedback control and method of control Download PDFInfo
- Publication number
- US20230021491A1 US20230021491A1 US17/384,588 US202117384588A US2023021491A1 US 20230021491 A1 US20230021491 A1 US 20230021491A1 US 202117384588 A US202117384588 A US 202117384588A US 2023021491 A1 US2023021491 A1 US 2023021491A1
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- United States
- Prior art keywords
- pump
- pressure
- motor
- command
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006073 displacement reaction Methods 0.000 title claims description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004513 sizing Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
- F01D17/06—Arrangement of sensing elements responsive to speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/07—Pressure difference over the pump
Definitions
- the present disclosure relates to a method of controlling a positive displacement pump, and specifically to controlling a pump using a pressure differential.
- Positive displacement pumps produce large parasitic losses in air breathing engine fluid systems.
- pumps are controlled based on their mechanical linkage to engine speed and are sized for to meet extreme conditions which are rarely reached or operated at. This leads to oversizing, which then requires other oversized components and unneeded flow capacity in the vast majority of operational conditions. This unneeded flow is a source of parasitic losses within an engine environment. While conventional design, operation, and sizing methods have generally been considered satisfactory for their intended purpose, there is still a need in the art for improved pump controls and sizing methods. The present disclosure provides a solution for this need.
- a method of controlling a pump includes monitoring a supply pressure of a pump, monitoring an outlet pressure of the pump, and commanding a motor to drive the pump at a speed based on a comparison of the supply pressure and the outlet pressure of the pump, where the pump is a positive displacement pump and the motor is an electric motor.
- the method can include receiving an initial pressure command from an engine controller. Commanding the motor can include changing a speed of the motor in response to a change from the initial pressure command from the engine controller and/or a change in differential pressure between the supply pressure and the outlet pressure.
- the monitored pressures can be sent as electrical signals directly to a motor controller to electrical and directly sent back to the motor controller command the motor to drive the pump.
- the method can also include actuating a stator vane of an aircraft based on an increased or decreased pressure from the pump.
- a system for operating the method described above includes a motor, a pump operatively coupled to the motor to be driven by the motor, wherein the pump includes an input side and an output side, a pressure sensor to monitor a pressure difference between the input side and output side of the pump, and a motor controller to command the motor based on the detected pressure difference across the pump and monitor the pressure sensor.
- the motor controller can be operatively coupled to an engine controller, where the engine controller can be configured to provide a pressure command to the motor controller based on power required to accomplish an actuation task.
- the pressure sensor can be configured to measure supply pressure and outlet pressure of the pump.
- the pressure sensor can include a first pressure sensing element located on a supply side of the pump, and a second pressure sensing element located on an output side of the pump.
- the pressure sensor can be a differential pressure sensor. It is also considered that the pressure sensor can include two independent sensors wherein each of the two independent sensors is configured to measure absolute pressure.
- the system can be part of an actuation system of an aircraft for actuating a stator vane or other air guiding element.
- the motor controller used in the method includes non-transitory computer readable medium comprising computer executable instructions to execute the steps of the method described above.
- the motor controller can be configured to receive a pressure command from the engine controller to produce power required to accomplish an actuation task, wherein the engine controller can also be responsible for controlling an aircraft engine.
- FIG. 1 is a schematic depiction of a pump motor controller in accordance with the disclosure.
- FIG. 1 a schematic view of an exemplary embodiment of a system for controlling a pump based on a pressure difference between an input and output pressure on the pump in accordance with the disclosure is shown in FIG. 1 and is designated generally by reference character 100 .
- the system and methods described herein allow for engine actuation systems to only consume power needed to accomplish an actuation task based on instant operational constraints, instead of depending on unrelated engine speed relationships, making for more efficient systems.
- the system 100 is part of an aircraft actuation system coupled to an aircraft engine, and is considered to be useful in both an actuation system and a main fuel pump application. Any system where a pressure needs to be manipulated to influence system functionality can benefit from this architecture.
- the system 100 includes a motor 102 , a pump 104 operatively coupled to and controlled by the motor 102 .
- the motor 102 is an electric motor
- the pump 104 is a positive displacement pump.
- a pressure sensor having a pair of sensing elements 106 a , 106 b is used to monitor the pressure difference across pump 104 .
- One pressure sensing element 106 a is located on an input side 105 of pump 104 to sense input pressure of the pump 104 .
- a second pressure sensing element 106 b is located on an output side 107 of the pump 104 in order to sense output pressure from the pump 104 .
- This type of pressure sensor can be a differential pressure sensor spanning a pump membrane in order to output a difference in pressures by referencing pressure with another location where pressure is also measure. It is also considered that each of the sensing elements 106 a , 106 b can be independent pressure sensors to measure and produce absolute pressure readings.
- the sensors 106 a/b can be separate pressure transducers, each connected to the microcontroller 108 to monitor a pressure difference across the pump 104 .
- Each one of the pressures sensing elements at each of the locations shown in FIG. 1 are both connected to a single differential pressure transducer 109 .
- the differential pressure transducer 109 is itself connected to the microcontroller 108 to convey input indicative of the pressure differential between the inlet and outlet of the pump 104 .
- a motor controller 108 is operatively coupled to the motor 102 in order to command the motor 102 to increase or decrease speeds based on targeted pressure commands received from a master engine controller 110 , and based on the input from the pressure sensors 106 a , 106 b .
- the motor controller 108 is programmed to compare the target pressure readings versus the outputs, and increase or decrease the speed of the motor 102 accordingly.
- the motor controller 108 includes a non-transitory computer readable medium which includes computer executable instructions to monitor a supply pressure of the pump 104 , monitor an outlet pressure of the pump 104 , and monitor and control the speed of the electric motor 102 based on a comparison of the supply pressure and the outlet pressure of the pump.
Abstract
A method of controlling an actuation pump including monitoring a supply pressure of a pump, monitoring an outlet pressure of the pump, commanding a motor by a motor controller, which receives the monitored pressures, to drive the pump at a speed based on a comparison of the supply pressure and the outlet pressure of the pump.
Description
- The present disclosure relates to a method of controlling a positive displacement pump, and specifically to controlling a pump using a pressure differential.
- Positive displacement pumps produce large parasitic losses in air breathing engine fluid systems. Traditionally pumps are controlled based on their mechanical linkage to engine speed and are sized for to meet extreme conditions which are rarely reached or operated at. This leads to oversizing, which then requires other oversized components and unneeded flow capacity in the vast majority of operational conditions. This unneeded flow is a source of parasitic losses within an engine environment. While conventional design, operation, and sizing methods have generally been considered satisfactory for their intended purpose, there is still a need in the art for improved pump controls and sizing methods. The present disclosure provides a solution for this need.
- A method of controlling a pump is disclosed. The method includes monitoring a supply pressure of a pump, monitoring an outlet pressure of the pump, and commanding a motor to drive the pump at a speed based on a comparison of the supply pressure and the outlet pressure of the pump, where the pump is a positive displacement pump and the motor is an electric motor. The method can include receiving an initial pressure command from an engine controller. Commanding the motor can include changing a speed of the motor in response to a change from the initial pressure command from the engine controller and/or a change in differential pressure between the supply pressure and the outlet pressure.
- It is also considered that the monitored pressures can be sent as electrical signals directly to a motor controller to electrical and directly sent back to the motor controller command the motor to drive the pump. The method can also include actuating a stator vane of an aircraft based on an increased or decreased pressure from the pump.
- A system for operating the method described above is also disclosed. The system includes a motor, a pump operatively coupled to the motor to be driven by the motor, wherein the pump includes an input side and an output side, a pressure sensor to monitor a pressure difference between the input side and output side of the pump, and a motor controller to command the motor based on the detected pressure difference across the pump and monitor the pressure sensor. The motor controller can be operatively coupled to an engine controller, where the engine controller can be configured to provide a pressure command to the motor controller based on power required to accomplish an actuation task.
- The pressure sensor can be configured to measure supply pressure and outlet pressure of the pump. The pressure sensor can include a first pressure sensing element located on a supply side of the pump, and a second pressure sensing element located on an output side of the pump. The pressure sensor can be a differential pressure sensor. It is also considered that the pressure sensor can include two independent sensors wherein each of the two independent sensors is configured to measure absolute pressure. The system can be part of an actuation system of an aircraft for actuating a stator vane or other air guiding element.
- The motor controller used in the method includes non-transitory computer readable medium comprising computer executable instructions to execute the steps of the method described above. The motor controller can be configured to receive a pressure command from the engine controller to produce power required to accomplish an actuation task, wherein the engine controller can also be responsible for controlling an aircraft engine.
- These and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings.
- So that those skilled in the art to which the subject disclosure appertains will readily understand how to make and use the devices and methods of the subject disclosure without undue experimentation, embodiments thereof will be described in detail herein below with reference to certain figures, wherein:
-
FIG. 1 is a schematic depiction of a pump motor controller in accordance with the disclosure. - Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, a schematic view of an exemplary embodiment of a system for controlling a pump based on a pressure difference between an input and output pressure on the pump in accordance with the disclosure is shown in
FIG. 1 and is designated generally byreference character 100. The system and methods described herein allow for engine actuation systems to only consume power needed to accomplish an actuation task based on instant operational constraints, instead of depending on unrelated engine speed relationships, making for more efficient systems. - Referring now to
FIG. 1 , a schematic ofsystem 100 is shown. Thesystem 100 is part of an aircraft actuation system coupled to an aircraft engine, and is considered to be useful in both an actuation system and a main fuel pump application. Any system where a pressure needs to be manipulated to influence system functionality can benefit from this architecture. Thesystem 100 includes amotor 102, apump 104 operatively coupled to and controlled by themotor 102. Themotor 102 is an electric motor, and thepump 104 is a positive displacement pump. - A pressure sensor having a pair of
sensing elements pump 104. Onepressure sensing element 106 a is located on aninput side 105 ofpump 104 to sense input pressure of thepump 104. A secondpressure sensing element 106 b is located on anoutput side 107 of thepump 104 in order to sense output pressure from thepump 104. This type of pressure sensor can be a differential pressure sensor spanning a pump membrane in order to output a difference in pressures by referencing pressure with another location where pressure is also measure. It is also considered that each of thesensing elements sensors 106 a/b can be separate pressure transducers, each connected to themicrocontroller 108 to monitor a pressure difference across thepump 104. Each one of the pressures sensing elements at each of the locations shown inFIG. 1 are both connected to a singledifferential pressure transducer 109. Thedifferential pressure transducer 109 is itself connected to themicrocontroller 108 to convey input indicative of the pressure differential between the inlet and outlet of thepump 104. Amotor controller 108 is operatively coupled to themotor 102 in order to command themotor 102 to increase or decrease speeds based on targeted pressure commands received from amaster engine controller 110, and based on the input from thepressure sensors motor controller 108 is programmed to compare the target pressure readings versus the outputs, and increase or decrease the speed of themotor 102 accordingly. - The
motor controller 108 includes a non-transitory computer readable medium which includes computer executable instructions to monitor a supply pressure of thepump 104, monitor an outlet pressure of thepump 104, and monitor and control the speed of theelectric motor 102 based on a comparison of the supply pressure and the outlet pressure of the pump. - The methods and systems of the present disclosure, as described above and shown in the drawings, provide for a method of designing and sizing an displacement pump system that is more attuned to the specific task it is required to perform. While the apparatus and methods of the subject disclosure have been shown and described with reference to preferred embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the scope of the subject disclosure.
Claims (19)
1. A method of controlling a pump comprising:
monitoring a supply pressure of a pump;
monitoring an outlet pressure of the pump; and
commanding a motor to drive the pump at a speed based on a comparison of the supply pressure and the outlet pressure of the pump.
2. The method of claim 1 , further comprising receiving an initial pressure command from an engine controller.
3. The method of claim 1 , wherein the motor is an electric motor.
4. The method of claim 1 , wherein the pump is a positive displacement pump.
5. The method of claim 1 , wherein commanding the motor includes changing a speed of the motor in response to a change from the initial pressure command from the engine controller and/or a change in differential pressure between the supply pressure and the outlet pressure.
6. The method of claim 1 , wherein the monitored pressures are sent as electrical signals directly to a motor controller to electrical and directly sent back to the motor controller command the motor to drive the pump.
7. The method of claim 1 , further comprising actuating a stator vane of an aircraft based on an increased or decreased pressure from the pump.
8. A system comprising:
a motor;
a pump operatively coupled to the motor to be driven by the motor, wherein the pump includes an input side and an output side;
a pressure sensor to monitor a pressure difference between the input side and output side of the pump; and
a motor controller to command the motor based on the detected pressure difference across the pump and monitor the pressure sensor.
9. The system of claim 8 , wherein the motor controller is operatively coupled to an engine controller.
10. The system of claim 9 , wherein the engine controller is configured to provide a pressure command to the motor controller based on power required to accomplish an actuation task.
11. The system of claim 8 , wherein the pressure sensor is configured to measure supply pressure and outlet pressure of the pump.
12. The system of claim 8 , wherein the pressure sensor includes a first pressure sensing element located on a supply side of the pump, and a second pressure sensing element located on an output side of the pump.
13. The system of claim 8 , wherein the pressure sensor is a differential pressure sensor.
14. The system of claim 8 , wherein the pressure sensor includes two independent sensors wherein each of the two independent sensors is configured to measure absolute pressure.
15. The system of claim 8 , wherein the system is part of an actuation system of an aircraft for actuating a stator vane or other air guiding element.
16. A motor controller for controlling a pump pressure comprising:
a non-transitory computer readable medium comprising computer executable instructions to:
monitor a supply pressure of the pump;
monitor an outlet pressure of the pump; and
command a motor based on a comparison of the supply pressure and the outlet pressure of the pump.
17. The microcontroller of claim 16 , wherein the pump is a positive displacement pump.
18. The microcontroller of claim 16 , wherein the motor controller is configured to receive a pressure command from the engine controller to produce power required to accomplish an actuation task.
19. The microcontroller of claim 16 , wherein the engine controller controls an aircraft engine.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/384,588 US20230021491A1 (en) | 2021-07-23 | 2021-07-23 | Displacement pump pressure feedback control and method of control |
EP22186434.1A EP4123174A1 (en) | 2021-07-23 | 2022-07-22 | Displacement pump pressure feedback control and method of control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US17/384,588 US20230021491A1 (en) | 2021-07-23 | 2021-07-23 | Displacement pump pressure feedback control and method of control |
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US20230021491A1 true US20230021491A1 (en) | 2023-01-26 |
Family
ID=82701945
Family Applications (1)
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US17/384,588 Pending US20230021491A1 (en) | 2021-07-23 | 2021-07-23 | Displacement pump pressure feedback control and method of control |
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US (1) | US20230021491A1 (en) |
EP (1) | EP4123174A1 (en) |
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EP4123174A1 (en) | 2023-01-25 |
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