CN113833694A - Control system and control method for adjustable stationary blade assembly of gas compressor, storage medium and test bench - Google Patents
Control system and control method for adjustable stationary blade assembly of gas compressor, storage medium and test bench Download PDFInfo
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- CN113833694A CN113833694A CN202010513917.7A CN202010513917A CN113833694A CN 113833694 A CN113833694 A CN 113833694A CN 202010513917 A CN202010513917 A CN 202010513917A CN 113833694 A CN113833694 A CN 113833694A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 239000003921 oil Substances 0.000 claims description 133
- 238000006073 displacement reaction Methods 0.000 claims description 48
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 230000006870 function Effects 0.000 description 17
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
Abstract
The invention relates to a control system, a control method, a storage medium and a test bench of an adjustable stationary blade assembly of a gas compressor, wherein the control system comprises a first oil path bypass, and the first oil path bypass is led out from a first oil path to an oil inlet; the second oil path bypass is led out from the second oil path to the oil outlet; and a first solenoid valve having a first state and a second state; wherein in the first state, the first solenoid valve closes the first oil passage bypass and the second oil passage bypass; in the second state, the first solenoid valve opens the first oil passage bypass and the second oil passage bypass; and outputting a state signal to the first electromagnetic valve through a controller to switch the first state and the second state.
Description
Technical Field
The invention relates to the field of gas compressors, in particular to a control system, a control method, a storage medium and a test bench of an adjustable stationary blade assembly of a gas compressor.
Background
The compressor, taking an axial flow type high-pressure compressor in a gas turbine engine as an example, a test piece of the axial flow type high-pressure compressor generally adopts a multistage independently adjustable stationary blade. For example, in a performance optimization test of a compressor test, the efficiency or surge margin of the high-pressure compressor is improved by adjusting the angle relation of the static blades of a single stage or different stages. As shown in fig. 1, the adjustable stator vane assembly comprises an adjustable stator vane 5 and a hydraulic ram 3, the adjustable stator vane 5 being driven in an angular displacement by the hydraulic ram 3. As shown in fig. 1 and 2, the hydraulic cylinder 3 may have a piston 31, the piston 31 divides the inside of the cylinder into a first chamber B and a second chamber a, a piston rod 32 is connected to a link ring 4 through a pull rod 33, the link ring 4 is connected to a crank of the rotatable stator vane 5 through a rocker arm, and finally, the linear motion of the piston 31 is converted into the angular motion of the stator vane 5.
Referring to fig. 1, a control system of an adjustable stationary blade assembly of a compressor generally controls the oil supply pressure/flow of a hydraulic cylinder 3 through a controller 2 and a servo valve 1 accurately, so as to drive adjustable stationary blades 5, each stage of adjustable stationary blade is generally provided with 1-4 angular displacement sensors 6, and an average value is taken as a feedback value of the angle of the stage of stationary blade and sent to the controller 2 to form closed-loop feedback control. The servo valve 1 may be a Linear position feedback proportional valve having a Linear Variable Differential Transformer (LVDT). The control system is provided with a first oil path 11, a second oil path 12 and the actuating cylinder 3 to form a loop, wherein the first oil path 11 is from the oil inlet 100 to the first chamber B, and the second oil path is from the second chamber A to the oil outlet 200.
For the control system of the adjustable stator component of the compressor shown in fig. 1, the inventor finds in practice that:
when the servo valve 2 fails (for example, the linear position sensor of the proportional valve fails, the magnetic induction coil is damaged/overtemperature, the main valve core is worn or the differential amplifier is damaged, etc.), the control of the oil supply pressure/flow of the actuating cylinder 3 is failed, and the adjusting capacity of the adjustable stator vane 5 is lost;
when the feedback control of the stator blade at a certain stage fails, for example, all the angular displacement sensors 6 fail (such as sensor falling off caused by vibration, signal loss and the like), especially for the case that only one angular displacement sensor is configured at each stage, the controller cannot form closed-loop feedback control due to the loss of the feedback signal, so that the regulation capability of the stator blade is lost; when a plurality of angular displacement sensors 6 are arranged on a single-stage stator blade, when one or more angular displacement sensors 6 feedback signals are abnormal (for example, the feedback values of the sensors are obviously wrong, the feedback signals are unstable and greatly jump, the linkage ring is eccentric to cause circumferential angle deviation, and the like), the controller 2 still can control according to the wrong feedback signals, so that the real angle of the adjustable stator blade 5 deviates from the target value and even continuously deteriorates;
during the operation of the compressor, the control of the adjustable stator blade 5 may be continuously deviated due to other factors, for example, the blade may bear a great pneumatic load during high-speed surge, the adjustable stator blade 5 transmits the pneumatic load to a connecting rod between the adjustable stator blade and the actuator cylinder 3 through a linkage ring, and at this time, if the hydraulic actuating force of the actuator cylinder 3 is insufficient, the blade may oscillate under the action of the pneumatic force, so that the angle of the blade is in a state of serious deviation control. And the serious deviation of the angle of the adjustable stator blade 5 can cause mismatching of the airflow angle of the downstream rotor blade, so that the airflow separation on the surface of the blade is caused, and the gas compressor enters a destabilization state.
Therefore, there is a need in the art for a control system, a control method, a storage medium and a test bench for a variable stator blade assembly of a compressor, so as to ensure safe, stable and reliable operation of the compressor.
Disclosure of Invention
One object of the present invention is to provide a control system for an adjustable stationary blade assembly of a compressor, so as to ensure safe, stable and reliable operation of the compressor.
Another object of the present invention is to provide a method for controlling a compressor adjustable stationary blade assembly.
It is still another object of the present invention to provide a computer-readable storage medium.
It is yet another object of the present invention to provide a test rig.
According to one aspect of the invention, the control system of the adjustable stator blade assembly of the compressor comprises a hydraulic actuating cylinder and an adjustable stator blade, wherein the hydraulic actuating cylinder drives the adjustable stator blade to generate angular displacement; the control system comprises a servo valve, an angular displacement sensor and a controller, wherein the controller transmits an actuating signal to the servo valve according to angular displacement data acquired by the angular displacement sensor, and controls the pressure or flow of liquid supplied to the hydraulic actuating cylinder to form feedback control; the actuating cylinder comprises a piston, the piston divides the interior of the actuating cylinder into a first cavity and a second cavity, and the first cavity and the second cavity are respectively connected with an oil inlet and an oil outlet through a first oil way and a second oil way; the control system further comprises: a first solenoid valve; a first oil passage bypass from the oil inlet to the actuator cylinder through the first solenoid valve; a second oil passage bypass from the actuator cylinder to the oil outlet through the first solenoid valve; and wherein the control system has a first state and a second state; in the first state, the first solenoid valve closes the first oil passage bypass and the second oil passage bypass; in the second state, the first solenoid opens the first oil passage bypass and the second oil passage bypass.
In one or more embodiments of the control system, the first solenoid valve is a three-position, four-way solenoid valve.
In one or more embodiments of the control system, the control system further comprises: the first balance logic valve is positioned in the first oil way; the second balance logic valve is positioned on the second oil way; a pilot solenoid valve; a third oil passage bypass leading out from the first oil passage to the first balanced logic valve through the pilot solenoid valve; the fourth oil path bypass is led out from the second oil path and is led to the second balanced logic valve through the pilot electromagnetic valve; wherein the control system further has a third state; in the first state, the pilot electromagnetic valve closes the third oil path bypass and the fourth oil path bypass to open the first balance logic valve and the second balance logic valve; in the third state, the pilot solenoid valve opens the third oil passage bypass and the fourth oil passage bypass to close the first balanced logic valve and the second balanced logic valve.
In one or more embodiments of the control system, the pilot solenoid is a two-position, three-way solenoid.
In one or more embodiments of the control system, in the first state, the adjustable vane assembly is operating normally; in the second state, the servo valve of the adjustable vane assembly fails closed or an angular displacement sensor signal is lost; in the third state, the angular displacement sensor of the adjustable vane assembly feeds back an abnormal or surging aerodynamic load causing vane angular oscillation.
In one or more embodiments of the control system, the direction of movement of the piston of the hydraulic ram is a first direction and a second direction opposite thereto, the displacement in the first direction being such that the hydraulic ram drives the opening of the adjustable stator vane to increase and the displacement in the second direction being such that the hydraulic ram drives the opening of the adjustable stator vane to decrease; the hydraulic actuator cylinder is provided with a limiting piece in the second direction, and the limiting piece limits the limit position of the hydraulic actuator cylinder in the second direction.
In one or more embodiments of the control system, the control system further comprises a control operation button for an operator to manually control the opening or closing of the first electromagnetic valve.
A test rig according to a further aspect of the invention includes a control system for a compressor adjustable vane assembly as described in any of the above.
According to another aspect of the invention, a method for controlling a compressor adjustable stationary blade assembly comprises the following steps:
s1, monitoring the state of the adjustable stationary blade assembly;
s2, if the normal operation of the adjustable stationary blade assembly is monitored, the first oil way and the second oil way are kept opened, and the other oil ways are closed;
if the servo valve of the adjustable stationary blade assembly is monitored to be closed in a failure mode or the signal of the angular displacement sensor is lost, the first oil way and the second oil way are closed, the bypass is opened to provide hydraulic oil for the actuating cylinder, and the actuating cylinder is driven to move;
and if the angle displacement sensor of the adjustable stator blade assembly is monitored to feed back abnormity or surge pneumatic load to cause stator blade angle oscillation, closing all oil paths for supplying hydraulic oil to the actuating cylinder of the adjustable stator assembly.
In one or more embodiments of the control method, the control system of the adjustable vane assembly includes a three-position, four-way solenoid valve, a balancing logic valve, and a two-position, three-way solenoid valve, and the step of, at S2:
if the normal operation of the adjustable stationary blade assembly is monitored, the three-position four-way electromagnetic valve and the two-position three-way electromagnetic valve are closed, and the balance logic valve is opened;
if the servo valve of the adjustable stationary blade assembly is monitored to be closed in a failure mode or the signal of the angular displacement sensor is lost, the three-position four-way electromagnetic valve is opened to open the bypass;
and if the angle of the static blade is oscillated due to the abnormal feedback or surging pneumatic load of the angular displacement sensor of the adjustable static blade assembly, the two-position three-way electromagnetic valve is opened, the balance logic valve is closed, and the three-position four-way electromagnetic valve is closed so as to close all oil paths for providing hydraulic oil for the actuating cylinder of the adjustable stator assembly.
A computer-readable storage medium according to another aspect of the present invention has stored thereon a computer program which is executed by a processor to implement the steps of the control method of any one of the above.
The beneficial effects of the invention include but are not limited to:
1. the first electromagnetic valve, the first oil path bypass and the second oil path bypass are arranged, so that the function of forcibly controlling the adjustable stationary blade is realized; when the servo valve is closed in a failure mode or an angular displacement sensor signal is lost, an oil way bypass can be opened through the first electromagnetic valve, the adjustable stator blade is automatically and forcibly adjusted to a safe position through manual operation or a controller, and the instability of the compressor caused by mismatching of the angle of the stator blade is prevented;
2. through the arrangement of the first balance logic valve, the second balance logic valve, the pilot electromagnetic valve, the third oil path bypass and the fourth oil path bypass, the position locking function of the adjustable stator blade is achieved, so that when the angle of the stator blade is oscillated due to the feedback abnormity of the angular displacement sensor or the surging pneumatic load, the adjustable stator blade is locked at the current position, and the continuous deterioration of control deviation is prevented.
In a word, the technical scheme, the adjustable stationary blade control system and the control method of the gas compressor realize the forced control function and the position locking function of the adjustable stationary blade. The forced control function provides a safety protection control method for the conventional control failure, the automatic position locking function provides safety protection for control deviation caused by abnormal signals of the angular displacement sensor, and the manual position locking function can effectively solve the problem of continuous deviation of adjustable stationary blade control caused by other factors, such as adjustable stationary blade oscillation and deviation caused by surge of the air compressor, so that the air compressor can safely, stably and reliably operate in a test environment of a test bench or an actual operation environment.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a control system for a compressor adjustable vane assembly according to the prior art.
Fig. 2 is a mechanical connection between the actuator cylinder and the adjustable stator vane.
FIG. 3 is a diagram illustrating a first state of an embodiment of the present invention.
FIG. 4 is a diagram illustrating a second state of an embodiment of the present invention.
FIG. 5 is a diagram illustrating a third state of an embodiment of the present invention.
FIG. 6 is a flow chart of a method of controlling a compressor adjustable vane assembly in accordance with an embodiment of the present invention.
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.
Also, the present application uses specific words to describe embodiments of the application, such as "one embodiment," "an embodiment," and/or "some embodiments" to mean that a particular feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate. In addition, the terms "first", "second", and the like are used to define the components, and are used only for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
It should be noted that in the following embodiments, "stator vane" is simply referred to as "stator blade", and both are synonymous and may be understood as the same component.
Referring to fig. 3 and 4, in one or more embodiments, the control system of the compressor adjustable vane assembly further includes a first oil bypass 111, a second oil bypass 112, and the first solenoid valve 10. The first oil path bypass 111 passes through the first solenoid valve 10 from the oil inlet 100 to the ram 3, and the second oil path bypass 112 passes through the first solenoid valve 10 from the ram 3 to the oil outlet 200.
The control system has a first state as shown in fig. 3 and a second state as shown in fig. 4. In the first state, the first solenoid valve 10 closes the first oil passage bypass 111 and the second oil passage bypass 112. Taking the first electromagnetic valve 10 as a three-position four-way valve as an example, the three-position four-way valve has a simple structure and is easy to control, and a complex oil path structure is not required to be arranged; in the first state, the three-position four-way electromagnetic valve is in the open circuit position, hydraulic oil is input into the actuator cylinder 3 from the oil inlet 100 through the first oil path 11 and the servo valve 1 and flows back to the oil outlet 200 through the second oil path 12 and the servo valve 1, and at the moment, the first electromagnetic valve 10 closes the first oil path bypass 111 and the second oil path bypass 112, so that the instability of the cavity pressure of the actuator cylinder caused by the parallel connection of multiple paths is prevented. In a first condition, the adjustable vane assembly operates normally.
As shown in fig. 4, when the control system is in the second state, the first electromagnetic valve 10 opens the first oil path bypass 111 and the second oil path bypass 112, and the hydraulic oil is input into the actuator cylinder 3 from the oil inlet 100 through the first electromagnetic valve 10 and the first oil path bypass 111, and flows back to the oil outlet 200 through the second oil path bypass 112 and the first electromagnetic valve 10 to form a hydraulic oil loop. In the second state, the servo valve 1 is closed in a failure, the first oil path bypass 111 and the second oil path bypass 112 are equivalent to backup oil paths, and hydraulic oil is continuously supplied to the actuator cylinder 3 when the servo valve 1 fails, so that the rotation angle of the adjustable stator vane 5 can be continuously adjusted. Specifically, the failure of the servo valve 1 may be automatically identified by the controller 2, or an operator of the compressor, for example, applies the control system to a test bench, and a test operator finds that the servo valve 1 is failed, controls an associated operation button, and performs opening or closing of the first electromagnetic valve 10, so as to switch the first oil path bypass 111 and the second oil path bypass 112 between closing and opening. The operation button should be understood in a broad sense, and the specific structure may be various, such as a pressing type button, a rotating knob, or even a touch screen operation. The second state also includes the condition that the loss of the angular displacement sensor signal of the controller 1 causes the failure of the feedback control, when the loss of the angular displacement sensor signal causes the failure of the feedback control of the controller 1, the operator can manually close the first oil path 11 and the second oil path 12, open the first oil path bypass 111 and the second oil path bypass 112, and forcibly push the piston 31 of the actuator 3 by manually operating the control actuator 3, so as to forcibly change the rotation angle of the adjustable stator blade and rotate the adjustable stator blade to a desired angle. The beneficial effects of the embodiment are that, when the servo valve 1 is closed in failure or the signal of the angular displacement sensor 6 is lost, the first oil path bypass and the second oil path bypass can be opened through the first electromagnetic valve, so that the forced control function of the adjustable stator blade is realized, the adjustable stator blade is forcibly adjusted to a safe position, and the instability of the compressor caused by mismatching of the angles of the stator blade is prevented. The progress of the above embodiments can be further understood in conjunction with the operation process of the compressor, when the compressor rotor is prone to form rotating stall when airflow separation occurs at the blade back, at this time, if the upstream stationary blade is closed, the positive attack angle of the movable blade can be reduced, airflow separation at the blade back is inhibited, and the compressor can be effectively prevented from entering the surge region. The servo valve 1 is forcibly adjusted to a full-closed position under the condition that the servo valve is closed in a failure mode or the adjustable stator blade 5 is controlled to be failed due to the loss of signals of the angular displacement sensor 6, so that the compressor can be ensured to be in a stable working state.
With continued reference to fig. 3-5, in some embodiments, the piston 31 of the hydraulic cylinder 3 moves in a first direction D1 and a second direction D2 opposite thereto, and displaces in the first direction D1, the hydraulic cylinder drives the adjustable stator vane 5 to increase in opening degree, i.e., the opening direction of the adjustable stator vane 5, and displaces in the second direction D2, and the hydraulic cylinder 3 drives the adjustable stator vane 5 to decrease in opening degree, i.e., the closing direction of the adjustable stator vane 5. The hydraulic cylinder 3 is provided with a limit stop in the second direction D2 to limit the limit position of the hydraulic cylinder 3 in the second direction D2. The beneficial effect that so sets up lies in, when manual operation, when the stator blade is closed, the grid distance between each blade also reduces thereupon, sets up extreme position and can prevent to cause the blade interval undersize and take place to bump and grind when the piston moves down to extreme position.
Referring to fig. 3 and 5, in some embodiments, the control system may further include a first balance logic valve 61, a second balance logic valve 62, a pilot solenoid valve 20, a third oil bypass 113, and a fourth oil bypass 114. The first balance logic valve 61 is positioned in the first oil path 11, the second balance logic valve 62 is positioned in the second oil path 12, and the pilot electromagnetic valve 20 can be a two-position three-way electromagnetic valve, so that the control is easy, and a complex oil path structure is not required. The third oil passage bypass 113 leads from the first oil passage 11 to the first balanced logic valve 61 through the pilot solenoid valve 20. And a fourth oil passage bypass 114 leading from the second oil passage 12 to the second balanced logic valve 62 through the pilot solenoid valve 20. As shown in fig. 3, in the first state of the control system, in which the system is operating normally, the pilot solenoid valve 20 closes the third and fourth oil passages 113 and 114 to open the first and second balance logic valves 61 and 62. That is, the first and second balance logic valves 61 and 62 are normally open, the operation and oil supply of the pilot solenoid valve 20 are controlled, and the pilot solenoid valve 20 is controlled by the controller 2. When the servo valve 1 normally controls the adjustable stator blade 5, the pilot electromagnetic valve 20 is in the open circuit position, no actuating oil pressure is introduced into the first balanced logic valve 61 and the second balanced logic valve 62, the valve core is in the passage state under the action of the spring, and the adjustable stator blade 5 performs conventional actuating control through the servo valve 1.
As shown in fig. 5, in a third state of the control system, for example, when the angular displacement sensor 6 feeds back an abnormal or surging pneumatic load to cause the rotation angle of the adjustable stator vane 5 to oscillate, the controller 2 instructs to open the pilot solenoid valve 20, open the third oil path bypass 113 and the fourth oil path bypass 114, so that the actuation oil pressure is supplied to the first balanced logic valve 61 and the second balanced logic valve 62 to make the spool reach the bidirectional open-circuit position against the spring force, thereby achieving the effect of locking the position of the adjustable stator vane 5. The principle is that the first chamber A and the second chamber B are in an isolated state, namely 2 hydraulic locks are connected in series in the first oil path 11 and the second oil path 12, and oil paths of the first chamber B and the second chamber A are respectively cut off in a bidirectional mode to form a dead chamber. Even if the adjustable stator blade 5 is subjected to a large pneumatic load at this time, the piston 31 does not move because the hydraulic oil in the cavity is incompressible, thereby achieving the position locking of the adjustable stator blade. Whether the control system is in the third state may be determined by the controller 2, and the determination condition may be,
1) the mutual deviation of the feedback values of the angular displacement sensor 6 reaches a threshold value;
2) the feedback value of the single or a plurality of angular displacement sensors 6 exceeds the calibration range of the rotation angle of the adjustable stator blade 5 of the stage;
3) the average value of the target value of the rotation angle of the adjustable stator blade 5 and the feedback value of the angular displacement sensor reaches a threshold value.
In the test process, the position of the adjustable stator blade 5 can be automatically or manually locked, an operator can remove safety risks according to failure situations, the locking can be released through manually operating an operating button, and the control system is switched back to the first state from the third state.
The progress of the above embodiments can be further understood by combining the operation process of the compressor, when the feedback signal of the angular displacement sensor 6 is abnormal, an error signal may cause the controller 2 to continuously open the angle of the adjustable stationary blade, so that the normal attack angle of the downstream movable blade is continuously increased, and the compressor enters an unstable state, whereas in the above embodiments, when the feedback signal of the angular displacement sensor 6 is abnormal, the adjustable stationary blade is locked at the current position, so that the continuous deterioration of the control deviation can be prevented.
Referring to fig. 6, a method of controlling a compressor variable vane assembly includes:
s1, monitoring the state of the adjustable stationary blade assembly;
s2, if the normal operation of the adjustable stationary blade assembly is monitored, the first oil way and the second oil way are kept opened, and the other oil ways are closed;
if the servo valve of the adjustable stationary blade assembly is monitored to be closed in a failure mode or the signal of the angular displacement sensor is lost, the first oil way and the second oil way are closed, the bypass is opened to provide hydraulic oil for the actuating cylinder, and the actuating cylinder is driven to move;
and if the angle displacement sensor of the adjustable stator blade assembly is monitored to feed back abnormity or surge pneumatic load to cause stator blade angle oscillation, closing all oil paths for supplying hydraulic oil to the actuating cylinder of the adjustable stator assembly.
Specifically, referring to fig. 3 to 5, the control system of the adjustable vane assembly includes the first solenoid valve 10, which is a three-position, four-way solenoid valve, the first balance logic valve 61, the second balance logic valve 62, and the pilot solenoid valve 20, which is a two-position, three-way solenoid valve, in said S2,
if the normal operation of the adjustable stationary blade assembly is monitored, the three-position four-way electromagnetic valve and the two-position three-way electromagnetic valve are closed, and the balance logic valve is opened;
if the servo valve of the adjustable stationary blade assembly is monitored to be invalid, the three-position four-way electromagnetic valve is opened to open the bypass;
and if the feedback control of the adjustable stationary blade assembly is monitored to be invalid, the two-position three-way electromagnetic valve is opened, the balance logic valve is closed, and the three-position four-way electromagnetic valve is closed so as to close all oil paths for providing hydraulic oil for the actuating cylinder of the adjustable stator assembly.
While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the steps are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.
According to another aspect of the present disclosure, a computer-readable storage medium is also provided.
The present disclosure provides the above-mentioned computer-readable storage medium having stored thereon computer instructions. The computer instructions, when executed by the processor, may implement the program to be executed by the processor to implement the steps of the method for controlling the adjustable vane assembly of the compressor as described in the above embodiments.
In summary, the control system and the control method for the adjustable stationary blade assembly of the compressor described in the above embodiments are adopted to realize the forced control function and the position locking function of the adjustable stationary blade. The first electromagnetic valve, the first oil path bypass and the second oil path bypass are arranged, so that the function of forcibly controlling the adjustable stationary blade is realized; when the servo valve is closed in a failure mode or an angular displacement sensor signal is lost, an oil way bypass can be opened through the first electromagnetic valve, the adjustable stator blade is automatically and forcibly adjusted to a safe position through manual operation or a controller, and the instability of the compressor caused by mismatching of the angle of the stator blade is prevented; through the arrangement of the first balance logic valve, the second balance logic valve, the pilot electromagnetic valve, the third oil path bypass and the fourth oil path bypass, the position locking function of the adjustable stator blade is achieved, so that when the angle of the stator blade is oscillated due to the feedback abnormity of the angular displacement sensor or the surging pneumatic load, the adjustable stator blade is locked at the current position, and the continuous deterioration of control deviation is prevented. The forced control function provides a safety protection control method for the conventional control failure, the automatic position locking function provides safety protection for the control deviation caused by the abnormal signal of the angular displacement sensor, and the manual position locking function can effectively solve the problem of the continuous deviation of the adjustable stationary blade control caused by other factors, such as the oscillation and deviation of the adjustable stationary blade caused by the surge of the air compressor, so that the air compressor can be safely, stably and reliably operated no matter in the test environment of a test bench or in the actual operation environment.
The steps of a method described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks (disks) usually reproduce data magnetically, while discs (discs) reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (11)
1. A control system of an adjustable stator blade assembly of a gas compressor comprises a hydraulic actuating cylinder and an adjustable stator blade, wherein the hydraulic actuating cylinder drives the adjustable stator blade to generate angular displacement; the control system comprises a servo valve, an angular displacement sensor and a controller, wherein the controller transmits an actuating signal to the servo valve according to angular displacement data acquired by the angular displacement sensor, and controls the pressure or flow of liquid supplied to the hydraulic actuating cylinder to form feedback control; the actuating cylinder comprises a cylinder body and a piston, the piston divides the interior of the actuating cylinder into a first cavity and a second cavity, and the first cavity and the second cavity are respectively connected with an oil inlet and an oil outlet through a first oil way and a second oil way; characterized in that the control system further comprises:
a first solenoid valve;
a first oil passage bypass from the oil inlet to the actuator cylinder through the first solenoid valve;
a second oil passage bypass from the actuator cylinder to the oil outlet through the first solenoid valve;
wherein the control system has a first state and a second state; in the first state, the first solenoid valve closes the first oil passage bypass and the second oil passage bypass; in the second state, the first solenoid opens the first oil passage bypass and the second oil passage bypass.
2. The control system of claim 1, wherein the first solenoid valve is a three-position, four-way solenoid valve.
3. The control system of claim 1, further comprising:
the first balance logic valve is positioned in the first oil way;
the second balance logic valve is positioned on the second oil way;
a pilot solenoid valve;
a third oil passage bypass leading out from the first oil passage to the first balanced logic valve through the pilot solenoid valve;
a fourth oil passage bypass leading out from the second oil passage to the second balanced logic valve through the pilot solenoid valve;
wherein the control system further has a third state;
in the first state, the pilot electromagnetic valve closes the third oil path bypass and the fourth oil path bypass to open the first balance logic valve and the second balance logic valve;
in the third state, the pilot solenoid valve opens the third oil passage bypass and the fourth oil passage bypass to close the first balanced logic valve and the second balanced logic valve.
4. The control system of claim 3, wherein the pilot solenoid valve is a two-position, three-way solenoid valve.
5. The control system of claim 3, wherein in the first state, the adjustable vane assembly is operating normally; in the second state, the servo valve of the adjustable vane assembly fails closed or an angular displacement sensor signal is lost; in the third state, the angular displacement sensor of the adjustable vane assembly feeds back an abnormal or surging aerodynamic load causing vane angular oscillation.
6. The control system of claim 1 wherein the direction of movement of the piston of the hydraulic ram is a first direction and a second direction opposite thereto, the displacement in the first direction being such that the hydraulic ram drives the adjustable stator vane to increase in opening and the displacement in the second direction being such that the hydraulic ram drives the adjustable stator vane to decrease in opening; the hydraulic actuator cylinder is provided with a limiting piece in the second direction, and the limiting piece limits the limit position of the hydraulic actuator cylinder in the second direction.
7. The control system of claim 1, further comprising a control operating button for an operator to manually control the opening or closing of the first solenoid valve.
8. A test rig comprising a control system for a compressor adjustable vane assembly as claimed in any one of claims 1 to 7.
9. A method of controlling a compressor variable vane assembly, comprising:
s1, monitoring the state of the adjustable stationary blade assembly;
s2, if the normal operation of the adjustable stationary blade assembly is monitored, the first oil way and the second oil way are kept opened, and the other oil ways are closed;
if the servo valve of the adjustable stationary blade assembly is monitored to be closed in a failure mode or the signal of the angular displacement sensor is lost, the first oil way and the second oil way are closed, the bypass is opened to provide hydraulic oil for the actuating cylinder, and the actuating cylinder is driven to move;
and if the angle displacement sensor of the adjustable stator blade assembly is monitored to feed back abnormity or surge pneumatic load to cause stator blade angle oscillation, closing all oil paths for supplying hydraulic oil to the actuating cylinder of the adjustable stator assembly.
10. The control method of claim 9, the control system of the adjustable vane assembly comprising a three-position, four-way solenoid valve, a balancing logic valve, and a two-position, three-way solenoid valve, wherein at said S2,
if the normal operation of the adjustable stationary blade assembly is monitored, the three-position four-way electromagnetic valve and the two-position three-way electromagnetic valve are closed, and the balance logic valve is opened;
if the servo valve of the adjustable stationary blade assembly is monitored to be closed in a failure mode or the signal of the angular displacement sensor is lost, the three-position four-way electromagnetic valve is opened to open the bypass;
and if the angle of the static blade is oscillated due to the abnormal feedback or surging pneumatic load of the angular displacement sensor of the adjustable static blade assembly, the two-position three-way electromagnetic valve is opened, the balance logic valve is closed, and the three-position four-way electromagnetic valve is closed so as to close all oil paths for providing hydraulic oil for the actuating cylinder of the adjustable stator assembly.
11. A readable storage medium, on which a computer program is stored, characterized in that the program is executed by a processor for implementing the steps of the control method according to claim 9 or 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513917.7A CN113833694A (en) | 2020-06-08 | 2020-06-08 | Control system and control method for adjustable stationary blade assembly of gas compressor, storage medium and test bench |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513917.7A CN113833694A (en) | 2020-06-08 | 2020-06-08 | Control system and control method for adjustable stationary blade assembly of gas compressor, storage medium and test bench |
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| CN113833694A true CN113833694A (en) | 2021-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592973A (en) * | 2022-03-16 | 2022-06-07 | 中国科学院工程热物理研究所 | Method, system, equipment and medium for controlling angle of adjustable stator blade of gas turbine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB939304A (en) * | 1959-05-28 | 1963-10-09 | Carrier Corp | Control mechanism for gas compression means |
| JPH07334248A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Oil temperature controller for hydraulic equipment |
| US5623823A (en) * | 1995-12-06 | 1997-04-29 | United Technologies Corporation | Variable cycle engine with enhanced stability |
| CN200940606Y (en) * | 2006-07-04 | 2007-08-29 | 武汉钢铁(集团)公司 | Static blade control system |
| JP2007285137A (en) * | 2006-04-13 | 2007-11-01 | Hitachi Ltd | Servo valve control circuit |
| EP2383439A2 (en) * | 2010-04-28 | 2011-11-02 | General Electric Company | Systems, methods, and apparatus for controlling turbine guide vane positions |
-
2020
- 2020-06-08 CN CN202010513917.7A patent/CN113833694A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB939304A (en) * | 1959-05-28 | 1963-10-09 | Carrier Corp | Control mechanism for gas compression means |
| JPH07334248A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Oil temperature controller for hydraulic equipment |
| US5623823A (en) * | 1995-12-06 | 1997-04-29 | United Technologies Corporation | Variable cycle engine with enhanced stability |
| JP2007285137A (en) * | 2006-04-13 | 2007-11-01 | Hitachi Ltd | Servo valve control circuit |
| CN200940606Y (en) * | 2006-07-04 | 2007-08-29 | 武汉钢铁(集团)公司 | Static blade control system |
| EP2383439A2 (en) * | 2010-04-28 | 2011-11-02 | General Electric Company | Systems, methods, and apparatus for controlling turbine guide vane positions |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592973A (en) * | 2022-03-16 | 2022-06-07 | 中国科学院工程热物理研究所 | Method, system, equipment and medium for controlling angle of adjustable stator blade of gas turbine |
| CN114592973B (en) * | 2022-03-16 | 2023-10-13 | 中国科学院工程热物理研究所 | Method, system, equipment and medium for controlling angle of adjustable stator blade of gas turbine |
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