CN111810468B - Pump control hydraulic system, device and control method of turbine engine - Google Patents
Pump control hydraulic system, device and control method of turbine engine Download PDFInfo
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- CN111810468B CN111810468B CN202010789466.XA CN202010789466A CN111810468B CN 111810468 B CN111810468 B CN 111810468B CN 202010789466 A CN202010789466 A CN 202010789466A CN 111810468 B CN111810468 B CN 111810468B
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003921 oil Substances 0.000 claims abstract description 206
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 48
- 230000001502 supplementing effect Effects 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 239000010705 motor oil Substances 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000010729 system oil Substances 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 6
- 230000010354 integration Effects 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000003749 cleanliness Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a turbine engine oil pump control hydraulic system, a device and a control method, which solve the problems of large installation space, high working medium cleanliness requirement, low energy utilization rate and difficult later maintenance required by the existing oil engine valve control system. The hydraulic control system of the turbine engine disclosed by the invention comprises a power module, a pressure temperature detection module, an oil supplementing module, a crisis covering module, a safety overflow module and an actuating mechanism module, wherein the servo motor drives the bidirectional hydraulic pump to directly drive the servo oil cylinder to act, the pressure temperature detection module monitors the pressure and the temperature of the high and low pressure sides of the system in real time, and a position sensor is connected with the servo oil cylinder through a mechanical device and feeds back the position of the servo oil cylinder in real time. The equipment has compact volume and high integration level, is convenient to field construction arrangement and later maintenance, and reduces the space required by equipment installation; when the system fails, the crisis covering time is short, and the running safety of the system is ensured.
Description
Technical Field
The invention relates to the technical field of turbine engines, in particular to a turbine engine pump control hydraulic system, a device and a control method.
Background
There are two typical control systems for the hydraulic control system of the turbine engine at present, one is a valve control hydraulic system of the engine, and the other is a pump control hydraulic system of the engine.
The hydraulic servo valve of the hydraulic motor valve control hydraulic system needs to be precise, and the requirement on the quality of a working medium is high, so that the pollution resistance of the system is poor, and the later maintenance is inconvenient; the hydraulic power element, the executing element, the control element and the hydraulic auxiliary are connected by pipelines, so that the integration level is low, and the occupied area of the installation is large; the valve-controlled hydraulic system has serious energy waste and serious system heating caused by a great amount of overflow loss.
Compared with a valve-controlled hydraulic system of the oil motor, the valve-controlled hydraulic system of the oil motor has the characteristics of small equipment volume, simple pipeline arrangement (no pipeline can be realized), no overflow loss, high reliability, high safety, high precision and the like, and can effectively solve the inherent defects of the valve-controlled hydraulic system of the oil motor, such as poor anti-pollution capability, low integration level, serious energy waste, high equipment installation cost, inconvenient maintenance and the like.
Compared with a hydraulic system controlled by a valve of a hydraulic machine, the hydraulic system controlled by the pump of the hydraulic machine has the advantages of 50% lower cost, 80% lower occupied space, 80% lower energy consumption ratio, 60% higher power-weight ratio, energy saving and noise reduction of equipment, convenient installation and simple maintenance.
The invention discloses a hydraulic system for controlling a pump of an oil motor, which is characterized in that a servo motor coaxially drives a bidirectional hydraulic pump, and a high-pressure oil port and a low-pressure oil port of the bidirectional hydraulic pump are directly connected with two load oil ports of a servo oil cylinder. The controller outputs a control signal to the servo driver, and the servo driver controls the servo motor to change the rotating speed of the bidirectional hydraulic pump, so that the accurate position control of the oil motor is realized.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide a hydraulic control system for the oil motor pump control of the steam turbine, which has the advantages of high control precision and the like of the traditional oil motor valve control equipment of the steam turbine, and simultaneously avoids the defects of poor pollution resistance, low integration level, serious energy waste, high equipment installation cost, inconvenient maintenance and the like.
The purpose of the invention is realized in the following way: a turbine engine pump control hydraulic system comprising
And a power module: the hydraulic control system comprises a servo motor and a bidirectional hydraulic pump, wherein the servo motor is connected with the bidirectional hydraulic pump through a coupler and used as a power source of the system to provide required pressure and flow for the system;
the pressure and temperature detection module is as follows: the system pressure and the system temperature of the system are monitored in real time, so that the safe operation of the system is ensured;
And the oil supplementing module is used for: the external leakage of the compensation system is compensated, and the problem of flow asymmetry of the pump control asymmetric servo oil cylinder is solved;
crisis cover module: when the system fails, the pressure is quickly unloaded in a very short time, the cylinder rod of the servo oil cylinder is controlled to extend out, and the steam inlet valve is closed;
and a safety overflow module: when the system is in normal operation and pressure overload occurs, the pressure of the system is stabilized within a safe range;
The executing mechanism module: the hydraulic oil outlet of the bidirectional hydraulic pump is directly connected with a rod cavity of the servo oil cylinder, the hydraulic oil outlet of the bidirectional hydraulic pump is directly connected with a rodless cavity of the servo oil cylinder, the hydraulic oil outlet of the bidirectional hydraulic pump is directly connected with the rodless cavity of the servo oil cylinder, and a telescopic rod of the servo oil cylinder is connected with a spring to control the opening of a steam inlet valve;
And a position detection module: and feeding back the displacement of the oil cylinder in real time.
The pressure and temperature detection module comprises a high-pressure sensor, a temperature sensor and a low-pressure sensor, wherein the high-pressure sensor is connected with a high-pressure cavity of the bidirectional hydraulic pump, the low-pressure sensor is connected with a low-pressure cavity of the bidirectional hydraulic pump, and the temperature sensor is connected with a low-pressure side of the bidirectional hydraulic pump.
The oil supplementing module is an oil supplementing energy accumulator, and the oil supplementing energy accumulator is connected to the low-pressure side of the bidirectional hydraulic pump.
The crisis cover module comprises an electromagnetic directional valve and a switching valve, an oil inlet of the switching valve is connected to the high-pressure side of the two-way hydraulic pump, an oil outlet of the switching valve is connected with the oil supplementing energy accumulator, the electromagnetic directional valve is connected with a switching valve control oil cavity, control oil of the switching valve is provided by a high-pressure cavity, and the switching of the switching valve is controlled by the control oil through the electromagnetic directional valve.
The safety overflow module comprises a safety overflow valve, an oil inlet of the safety overflow valve is connected with a high-pressure cavity of the bidirectional hydraulic pump, and an oil outlet of the safety overflow valve is connected with a low-pressure cavity.
The further technical scheme is that the position detection module comprises a position sensor, and the position sensor is connected to the tail end of a cylinder rod of the servo oil cylinder.
After the system is started, a control instruction is given, whether the pressure and the temperature of the system are normal or not is monitored through a pressure temperature detection module, and if the pressure of a low-pressure cavity is too high, the pressure of the low-pressure cavity is too low, the temperature of the system is too high or the temperature of the system is too low, the system calls an open-loop control subroutine of a motor, and the motor is in a standby state; when the pressure temperature of the pressure temperature detection module feeds back that the pressure temperature of the system is normal, the system is ready to control, a closed-loop control subroutine of the motor is called, and after the servo oil cylinder reaches a designated position quickly according to a planning curve, the position of the oil motor is maintained.
The further technical scheme is that the system controls the position process of the oil motor to be as follows: the position of the servomotor is fed back to the controller in real time through the position sensor, the controller compares the fed-back position signal with the given position command, the servo driver is controlled by the controller to output a rotating speed signal after the feedback position signal is processed through a system program, the rotation of the servomotor is controlled, and the servomotor moves to a designated position through a closed-loop control subprogram of the motor, so that accurate position control is realized; when the system fails, the pressure is quickly unloaded in a short time, and the steam inlet valve is closed, so that the system is protected.
A turbine engine pump control hydraulic device, comprising
A power unit: the hydraulic control system comprises a servo motor and a bidirectional hydraulic pump, wherein the servo motor is connected with the bidirectional hydraulic pump through a coupler and is connected to the right front side through a valve block;
The switching valve, the electromagnetic reversing valve, the pressure temperature detection module and the safety overflow valve are connected to the upper surface of the valve block through the valve block, and the oil supplementing energy accumulator is connected to the left rear side through the valve block; an oil inlet of the switching valve is connected to the high-pressure side of the bidirectional hydraulic pump, an oil outlet of the switching valve is connected with the oil supplementing accumulator, the electromagnetic reversing valve is connected with a switching valve control oil cavity, control oil of the switching valve is provided by the high-pressure cavity, and the control oil controls on-off of the switching valve through the electromagnetic reversing valve; an oil inlet of the safety overflow valve is connected with a high-pressure cavity of the bidirectional hydraulic pump, and an oil outlet of the safety overflow valve is connected with a low-pressure cavity;
The executing mechanism comprises: the hydraulic control device comprises a servo oil cylinder and a control seat, wherein the control seat is connected to the servo oil cylinder, and the servo oil cylinder is connected to a hydraulic valve block; the high-pressure oil port of the two-way hydraulic pump is connected with the rod cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the low-pressure oil port of the two-way hydraulic pump is connected with the rod-free cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the oil supplementing energy accumulator is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder, the oil draining port of the two-way hydraulic pump is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder at the same time and is connected with the oil supplementing energy accumulator, and the position sensor is connected with the tail end of the servo oil cylinder.
Due to the adoption of the technical scheme, compared with the prior art, the method has the beneficial effects that:
1) The integrated pipeline-free connection mode is adopted, so that the integration level of the system is greatly improved;
2) The pump control system solution is adopted, so that the problem that the system has high requirement on the cleanliness of the working medium oil products is solved, and the reliability of the system is improved;
3) The control system composed of three parts, namely logic control, position closed-loop control and system alarm control, ensures the high reliability of the system.
Drawings
FIG. 1 is a schematic diagram of the hydraulic control of the turbine engine pumping system of the present invention;
FIG. 2 is a position control block diagram of a turbine engine pumping system of the present invention;
FIG. 3 is a functional block diagram of a turbine engine pumping system of the present invention;
FIG. 4 is a logic control flow diagram of a turbine engine pumping system of the present invention;
FIG. 5 is a schematic diagram of a physical device of a turbine engine pumping system according to the present invention;
Reference numerals: 1-a servo motor; 2-a bi-directional hydraulic pump; 3-a low pressure sensor; 4-an oil supplementing accumulator; 5-a temperature sensor; 6-an electromagnetic reversing valve; 6.1-an electromagnetic reversing valve I; 6.2-an electromagnetic reversing valve II; 7-switching a valve; 8-a safety overflow valve; 9-a servo oil cylinder; 10-position sensor; 11-a steam inlet valve; 12-a high-pressure sensor; 13-valve block; 14-a control seat; a-a power module; b-a pressure temperature detection module; c-an oil supplementing module; d-crisis covering module; e-a safety overflow module; f-an actuator module; g-position detection module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
A turbine engine pumping system hydraulic system comprising:
And a power module: the hydraulic control system comprises a servo motor 1 and a bidirectional hydraulic pump 2, wherein the servo motor 1 is connected with the bidirectional hydraulic pump 2 through a coupler and used as a power source of the system to provide required pressure and flow for the system;
A pressure temperature detection module; the system pressure and the system temperature of the system are detected in real time, so that the safe operation of the system is ensured; the system comprises a low pressure sensor 3, a temperature sensor 5 and a high pressure sensor 12, wherein the low pressure sensor 3 is connected with a low pressure cavity of the bidirectional hydraulic pump 2, the high pressure sensor 12 is connected with a high pressure cavity of the bidirectional hydraulic pump 2, and the temperature sensor 5 is connected with the low pressure side of the bidirectional hydraulic pump 2; the position sensor 10 is connected to the tail end of the cylinder rod of the servo oil cylinder and is used for monitoring the position of the oil motor in real time and feeding back the position to the controller.
The oil supplementing module plays two roles, namely, the external leakage of the compensation system is compensated, and the problem of flow asymmetry of the pump-control asymmetric servo oil cylinder is solved; the oil supplementing module is an oil supplementing energy accumulator 4, and the oil supplementing energy accumulator 4 is connected to the low-pressure side of the two-way hydraulic pump 2;
the crisis covering module is used for closing the steam inlet valve in a very short time when the system fails to finish quick unloading; the crisis covering module comprises an electromagnetic directional valve 6 and a switch valve 7, wherein an oil inlet of the switch valve 7 is connected to the high-pressure side of the bidirectional hydraulic pump 2, an oil outlet of the switch valve is connected with an oil supplementing accumulator 4, the electromagnetic directional valve 6 is connected with a control oil cavity of the switch valve 7, control oil of the switch valve 7 is provided by a working medium of a high-pressure cavity, two oil ports of the electromagnetic directional valve are connected to the high-pressure cavity of the bidirectional hydraulic pump, one port of the electromagnetic directional valve is connected to a low-pressure cavity of the bidirectional hydraulic pump, the switching of the high-pressure and the low-pressure of control oil is realized by controlling the switching of the on-off of the electromagnetic directional valve, and the on-off of the switch valve 7 is controlled by controlling the oil through the electromagnetic directional valve 6;
The safety overflow module is used for stabilizing the pressure of the system within a safety range when abnormal high pressure occurs in normal operation of the system; the safety overflow module comprises a safety overflow valve 8, an oil inlet of the safety overflow valve 8 is connected with a high-pressure cavity of the bidirectional hydraulic pump 2, and an oil outlet of the safety overflow valve is connected with a low-pressure cavity
The actuator module comprises a servo oil cylinder 9 and a steam inlet valve 11, wherein an oil port (short for a high-pressure cavity) of the two-way hydraulic pump 2 for outputting high-pressure oil is directly connected with a rod cavity of the servo oil cylinder 9, an oil port (short for a low-pressure cavity) of the two-way hydraulic pump 2 for outputting low-pressure oil is directly connected with a rodless cavity of the servo oil cylinder 9, an oil drain port of the two-way hydraulic pump 2 is directly communicated with the rodless cavity of the servo oil cylinder 9, a position sensor 10 is connected with the servo oil cylinder 9 through a mechanical device, a spring is connected to a telescopic rod of the servo oil cylinder 9, and the opening degree of the steam inlet valve 11 is controlled.
As shown in fig. 1, the hydraulic system of the turbine engine oil pump control system is composed of a servo motor 1, a two-way hydraulic pump 2, a low-pressure sensor 3, an oil supplementing energy accumulator 4, a temperature sensor 5, an electromagnetic reversing valve 6, a switching valve 7, a safety overflow valve 8, a servo cylinder 9, a position sensor 10, an inlet valve 11, a high-pressure sensor 12 and a hydraulic valve block for connecting all elements; the bidirectional hydraulic pump 2 starts to work under the drive of the servo motor 1, high-pressure hydraulic oil directly enters a rod cavity of the servo oil cylinder 9 through a pore canal in a hydraulic valve block, the servo oil cylinder 9 is driven to compress a spring, the opening of a steam turbine valve 11 is controlled, part of low-pressure oil in a rodless cavity of the servo oil cylinder 9 enters an oil suction port of the bidirectional hydraulic pump 2, and the other part of low-pressure oil enters an oil supplementing energy accumulator 4, and a low-pressure sensor 3, a high-pressure sensor 12 and a temperature sensor 5 detect the pressure and the temperature of a system. When the system needs crisis covering, the electromagnetic directional valve 6 is powered on, low-pressure control oil enters a control cavity of the switch valve 7 through the electromagnetic directional valve 6, the switch valve 7 is opened, high-pressure oil in a rod cavity of the servo oil cylinder 9 rapidly enters a rodless cavity of the servo oil cylinder 9 through the switch valve 7, and meanwhile, part of oil in the oil supplementing energy accumulator 4 also enters the rodless cavity until the oil engine moves to a specified position, the valve of the steam turbine is completely closed, steam inlet is stopped, and the system completes crisis covering; furthermore, the electromagnetic directional valve 6 adopts a redundant design, namely the electromagnetic directional valve 6 is arranged into an electromagnetic directional valve I6.1 and an electromagnetic directional valve II 6.2, and when one of the electromagnetic directional valves fails, the other electromagnetic directional valve can still ensure that the system can complete crisis covering.
The hydraulic system of the turbine engine oil pump control system also comprises a control system which adopts three parts of logic control, position closed-loop control and system alarm control. Position instruction giving and position signal feedback of the upper computer and the controller are realized through bus or hardware cable signals, fault information such as alarm, crisis coverage and the like of the system is monitored in real time, and stable operation and stable and reliable signal transmission of the system are ensured; the controller can realize logic control and high-performance position closed-loop control of the system, and control signals are sent to the servo driver through buses or analog quantities, so that the servo motor can run rapidly and stably.
The functional block diagram of the turbine engine pumping system of the present invention is shown in fig. 3. The following is detailed below:
The turbine engine pump control hydraulic system consists of a power module A, a pressure and temperature detection module B, an oil supplementing module C, a crisis covering module D, a safety overflow module E, an actuating mechanism module F and a position detection module G. All the modules are mutually matched, and the purpose of high-precision position control is achieved. The roles between the respective modules will now be described in detail:
1) Power module a: as the power source of the system, the pressure and the flow rate required by the system are required.
2) Pressure temperature detection module B: the system pressure and the system temperature of the system are detected in real time, so that the safe operation of the system is ensured.
3) Oil supplementing module C: the oil supplementing module plays two roles, namely, the external leakage of the compensation system is compensated, and the problem of asymmetric flow of the pump control asymmetric servo oil cylinder is solved.
4) Crisis cover module D: when the system fails and the steam inlet valve is required to be closed in a very short time, the electromagnetic directional valve 6 and the switch valve 7 act to finish quick unloading.
5) Safety overflow module E: when the system normally operates and abnormal high pressure occurs, the pressure of the system is stabilized in a safety range through the overflow module.
6) And the actuator module F is a valve opening control device.
7) Position detection module G: and feeding back the displacement of the oil cylinder in real time.
The logic control flow chart of the turbine engine pumping control system is shown in fig. 4. The following is detailed below:
Control logic of a turbine engine pump control system: after the system is started, a control instruction is given, whether the pressure of the system and the temperature of the system are normal or not is monitored through the pressure temperature detection module, if the pressure of the low-pressure cavity is too low, or when the pressure of the low-pressure cavity is too high, or the temperature is too low or the temperature is too high, the system calls an open-loop control subroutine of the motor, and the motor is in a standby state. When the pressure temperature of the pressure temperature detection module feeds back that the pressure temperature of the system is normal, the system starts to work normally, the oil motor is not in a control instruction position, a closed-loop control subprogram of the motor is called, the servo oil cylinder rapidly reaches a designated position according to a planning curve, and the position of the oil motor is maintained.
The schematic diagram of the position control block diagram of the turbine engine oil pump control hydraulic system of the present invention, as shown in fig. 2, is now described in detail as follows:
The magnitude of valve admission volume is controlled through the position of the servomotor, given appointed position instruction, the position of the servomotor is fed back to the controller in real time through the position sensor, the controller compares the position signal fed back with the given position instruction, after processing through the system program, the rotation speed control signal is output, the rotation of the servo motor is controlled, the actual rotation speed signal of the servo motor is fed back to the controller in real time, and the servomotor moves to the appointed position through the motor closed-loop control subprogram, so that accurate position control is realized. When the system is abnormal, the upper computer sends a signal to the controller, the crisis covering unit plays a role in rapidly unloading the engine in a short time, and the valve is rapidly closed, so that the system is protected.
An embodiment of a turbine engine pumping device of the present invention is schematically shown in fig. 5, and is now described in detail as follows:
As shown in fig. 5, the hydraulic valve block connects various components in the hydraulic system together, the power unit comprises a servo motor 1 and a bidirectional hydraulic pump 2, the servo motor 1 is connected to the right front side through a valve block 13, the servo motor 1 is connected with the bidirectional hydraulic pump 2 through a coupler, a switching valve 7, two electromagnetic directional valves 6, a pressure temperature detection module B and a safety relief valve 8 (not shown in the figure) are connected to the surface of the valve block 13 through the valve block 13, an oil supplementing accumulator 4 is connected to the left rear side through the valve block 13, an oil inlet of the switching valve 7 is connected to the high pressure side of the bidirectional hydraulic pump 2, an oil outlet is connected with the oil supplementing accumulator 4, the electromagnetic directional valves 6 are connected with a control oil cavity of the switching valve 7, control oil of the switching valve 7 is provided by a high pressure cavity working medium, and the control oil controls the on-off of the switching valve 7 through the electromagnetic directional valves 6; an oil inlet of the safety overflow valve 8 is connected with a high-pressure cavity of the bidirectional hydraulic pump 2, and an oil outlet is connected with a low-pressure cavity; the actuating mechanism consists of a servo oil cylinder 9 and an actuating seat 14, the actuating seat 14 is connected to the servo oil cylinder 9, the servo oil cylinder 9 is connected to a hydraulic valve block 13, a high-pressure oil port of the bidirectional hydraulic pump 2 is connected with a rod cavity of the servo oil cylinder 9 through a pore canal in the hydraulic valve block 13, a low-pressure oil port of the bidirectional hydraulic pump 2 is connected with a rodless cavity of the servo oil cylinder 9 through a pore canal in the hydraulic valve block 13, an oil supplementing accumulator 4 is bridged between the low-pressure oil port of the bidirectional hydraulic pump 2 and the rodless cavity of the servo oil cylinder 9, an oil draining port of the bidirectional hydraulic pump 2 is bridged between the low-pressure oil port of the bidirectional hydraulic pump 2 and the rodless cavity of the servo oil cylinder 9 at the same time and is connected with the oil supplementing accumulator 4, and a position sensor 10 is connected with the tail end of the servo oil cylinder 9. Because the elements in the equipment are all connected through the hydraulic valve block, the integration level of the equipment is improved; by adopting the connection without a pipeline, the leakage of system equipment is reduced, and the pollution resistance of the equipment is improved.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (4)
1. The utility model provides a steam turbine engine pump accuse hydraulic system which characterized in that includes
The power module comprises a servo motor and a two-way hydraulic pump, wherein the servo motor is connected with the two-way hydraulic pump through a coupler and used as a power source of the system to provide required pressure and flow for the system;
The pressure and temperature detection module is used for monitoring the system pressure and the system temperature in real time so as to ensure the safe operation of the system; the pressure and temperature detection module comprises a high-pressure sensor, a temperature sensor and a low-pressure sensor, wherein the high-pressure sensor is connected with a high-pressure cavity of the bidirectional hydraulic pump, the low-pressure sensor is connected with a low-pressure cavity of the bidirectional hydraulic pump, and the temperature sensor is connected with a low-pressure side of the bidirectional hydraulic pump;
The oil supplementing module plays two roles, namely, the external leakage of the compensation system is compensated, and the problem of flow asymmetry of the pump-control asymmetric servo oil cylinder is solved; the oil supplementing module is an oil supplementing energy accumulator which is connected to the low-pressure side of the two-way hydraulic pump;
The crisis covering module is used for completing pressure unloading when the system fails and controlling a cylinder rod of the servo cylinder to extend out to close the steam inlet valve; the crisis covering module comprises an electromagnetic directional valve and a switching valve, an oil inlet of the switching valve is connected to the high-pressure side of the bidirectional hydraulic pump, an oil outlet of the switching valve is connected with the oil supplementing energy accumulator, the electromagnetic directional valve is connected with a switching valve control oil cavity, control oil of the switching valve is provided by a high-pressure cavity, and the switching of the switching valve is controlled by the control oil through the electromagnetic directional valve;
The safety overflow module stabilizes the system pressure within a safety range when the system is in pressure overload during operation; the safety overflow module comprises a safety overflow valve, an oil inlet of the safety overflow valve is connected with a high-pressure cavity of the bidirectional hydraulic pump, and an oil outlet of the safety overflow valve is connected with a low-pressure cavity;
the actuating mechanism module comprises a servo oil cylinder, an oil port of the bidirectional hydraulic pump for outputting high-pressure oil is directly connected with a rod cavity of the servo oil cylinder, an oil port of the bidirectional hydraulic pump for outputting low-pressure oil is directly connected with a rodless cavity of the servo oil cylinder, an oil drain port of the bidirectional hydraulic pump is directly communicated with the rodless cavity of the servo oil cylinder, a telescopic rod of the servo oil cylinder is connected with a spring, and the opening of a steam inlet valve is controlled; the hydraulic control device further comprises an operating seat, wherein the operating seat is connected to the servo oil cylinder, and the servo oil cylinder is connected to the lower surface of the hydraulic valve block; the high-pressure oil port of the two-way hydraulic pump is connected with the rod cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the low-pressure oil port of the two-way hydraulic pump is connected with the rod-free cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the oil supplementing energy accumulator is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder, the oil draining port of the two-way hydraulic pump is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder at the same time and is connected with the oil supplementing energy accumulator, and the position sensor is connected with the tail end of the servo oil cylinder;
And the position detection module feeds back the displacement of the oil cylinder in real time.
2. The control method of the turbine engine oil pump control hydraulic system according to claim 1, wherein after the system is started, a control instruction is given, firstly, whether the pressure and the temperature of the system are normal is monitored through a pressure temperature detection module, and if the pressure of a low-pressure cavity is too high, the pressure of the low-pressure cavity is too low, the temperature of the system oil is too high or the temperature of the system oil is too low, the system calls an open-loop control subroutine of a motor, and the motor is in a standby state; when the pressure temperature of the pressure temperature detection module feeds back that the pressure temperature of the system is normal, the system is ready to control, a closed-loop control subroutine of the motor is called, and after the servo oil cylinder reaches a designated position quickly according to a planning curve, the position of the oil motor is maintained.
3. The control method according to claim 2, wherein the system controls the position process of the oil mover as follows: the position of the servomotor is fed back to the controller in real time through the position sensor, the controller compares the fed-back position signal with the given position command, and after the feedback position signal is processed through a system program, a control signal is output to control the rotation of the servo motor, and the servomotor moves to a designated position through a motor closed-loop control subprogram to realize accurate position control; when the system is abnormal, the upper computer sends a signal to the controller, the crisis covering module plays a role in rapidly unloading the engine in a short time, and the valve is rapidly closed, so that the system is protected.
4. A turbine engine pump control hydraulic device comprising the turbine engine pump control hydraulic system of claim 1, comprising
The power unit comprises a servo motor and a two-way hydraulic pump, wherein the servo motor is connected with the two-way hydraulic pump through a coupler and is connected to the right front side through a valve block;
The switching valve, the electromagnetic reversing valve, the pressure sensor, the temperature sensor and the safety overflow valve are connected to the upper surface of the valve block through the valve block, and the oil supplementing energy accumulator is connected to the left rear side through the valve block; an oil inlet of the switching valve is connected to the high-pressure side of the bidirectional hydraulic pump, an oil outlet of the switching valve is connected with the oil supplementing accumulator, the electromagnetic reversing valve is connected with a switching valve control oil cavity, control oil of the switching valve is provided by the high-pressure cavity, and the control oil controls on-off of the switching valve through the electromagnetic reversing valve; an oil inlet of the safety overflow valve is connected with a high-pressure cavity of the bidirectional hydraulic pump, and an oil outlet of the safety overflow valve is connected with a low-pressure cavity;
The actuating mechanism comprises a servo oil cylinder and an operating seat, the operating seat is connected to the servo oil cylinder, and the servo oil cylinder is connected to the lower surface of the hydraulic valve block; the high-pressure oil port of the two-way hydraulic pump is connected with the rod cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the low-pressure oil port of the two-way hydraulic pump is connected with the rod-free cavity of the servo oil cylinder through a pore canal in the hydraulic valve block, the oil supplementing energy accumulator is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder, the oil draining port of the two-way hydraulic pump is bridged between the low-pressure oil port of the two-way hydraulic pump and the rod-free cavity of the servo oil cylinder at the same time and is connected with the oil supplementing energy accumulator, and the position sensor is connected with the tail end of the servo oil cylinder.
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| CN113417896B (en) * | 2021-06-04 | 2022-05-10 | 燕山大学 | Pump-controlled hydraulic system of press machine and control method thereof |
| CN113417897B (en) * | 2021-06-04 | 2022-05-10 | 燕山大学 | Variable displacement series pump control electric hydrostatic actuator |
| CN114704525A (en) * | 2022-04-18 | 2022-07-05 | 太重集团榆次液压工业(济南)有限公司 | Direct-drive volume control electro-hydraulic servo device |
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