CN107237796A - A kind of special servomotor performance testing device of Steam Turbine - Google Patents
A kind of special servomotor performance testing device of Steam Turbine Download PDFInfo
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- CN107237796A CN107237796A CN201710519028.XA CN201710519028A CN107237796A CN 107237796 A CN107237796 A CN 107237796A CN 201710519028 A CN201710519028 A CN 201710519028A CN 107237796 A CN107237796 A CN 107237796A
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- quick closing
- servomotor
- oil cylinder
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of special servomotor performance testing device of Steam Turbine, including the first quick closing valve magnetic valve, the second quick closing valve magnetic valve, the first inserted valve, the second inserted valve, servo valve, filter, oil pump, fuel tank, valve, spring, oil cylinder, fuel outlet, buffering hydraulic fluid port, displacement transducer, industrial computer and servo card.The parameter of frictional force size between quick closing's time, open and close performance, the spring force size of servomotor, servomotor piston and oil cylinder of the performance testing device of the present invention for testing servomotor, and carry out these parameters to preserve in the form of form in a device after analysis calculating, convenient access.The present invention is perfect to the test function of servomotor, surveys data accurately, practical.
Description
Technical field
The present invention relates to the testing field of steam turbine power generation regulating system servomotor, more particularly to a kind of Steam Turbine is special
Servomotor performance testing device.
Background technology
Power plant generating basic process is that, by heating water to steam condition, pushing turbine generates electricity.Steam turbine power generation
It is also the main forms of electricity generation of China., it is necessary to keep steamer by adjusting the throttle flow of steam-turbine in power generation process
The rotating speed that 3000 rpms of machine rotor.Simultaneously because electric power is unable to mass storage in power generation process, generated energy is by user's request
To determine.It is also required to control the air inflow of steam-turbine to meet need for electricity to adjust generated output with this.Steam Turhine Adjustment
The main function of system is exactly rotational speed regulation and power adjusting.
Steam turbine control system, the rotating speed and generated output of turbine rotor are adjusted by adjusting steam turbine throttle flow.
Its executing agency is exactly servomotor, and the aperture of admission valve is adjusted under the drive of servomotor, reaches regulation throttle flow purpose.Oil
Another major function of motivation is, in hydraulic system after Safety oil (i.e. inserted valve epicoele control oil) off-load, in spring
Quick closedown is realized in the presence of power.
Servomotor, also referred to as hydraulic servo motor, by oil cylinder, servo valve, magnetic valve, unloading valve, displacement transducer, stroke
The composition such as switch, check valve and pressure measuring tie-in.With reference to accompanying drawing it can be seen that servomotor operation principle.Servomotor has hydraulic system
Control accuracy is high, output torque is big, travel speed is fast, be easy to implement the advantage frequently commutated.In turbine admission valve regulation
In have a wide range of applications.Generally have required precision high for the servomotor used in steam turbine, power and volume are big.Due to
Steam turbine power generation needs the reliability of height, and the performance detection of servomotor is indispensable.Currently, carried out for servomotor
It is significant that special detection device carries out R ＆ D design.
The detection experiment of servomotor, typically servomotor are opened, close porthole experiment, in case of emergency quickly open,
Quick closedown.Simulation actual working conditions are needed to test for servomotor Function detection.Used in actual steam turbine, also
Need to provide time delay, buffer time, terminal velocity, valve start bit spring force, valve wide open position spring force, friction
The parameters such as power, opening time, shut-in time.Whether these parameters can qualified for detection servomotor, can be used for entirety
The performance of steam turbine power generation is assessed, the accuracy of turbine system modeling is improved.Simultaneously for the detection of these basic parameters,
Guidance can be provided for the design of servomotor.
The solution of the present invention is the improvement carried out regarding to the issue above to existing servomotor test device.
The content of the invention
In order to overcome deficiency of the prior art, the present invention provides a kind of Steam Turbine special servomotor performance test dress
Put, solve the problem of existing servomotor test device test is inconvenient, measurement accuracy is not high.
In order to reach foregoing invention purpose, the technical scheme that its technical problem used is solved as follows：
A kind of special servomotor performance testing device of Steam Turbine, including the first quick closing valve magnetic valve, the second quick closing valve electromagnetism
Valve, the first inserted valve, the second inserted valve, servo valve, filter, oil pump, fuel tank, valve, spring, oil cylinder, fuel outlet, buffering oil
Mouth, displacement transducer, industrial computer and servo card, wherein：
The oil pump after the filter respectively with the first quick closing valve magnetic valve, the second quick closing valve magnetic valve and servo valve
P mouths connection；
The fuel tank connects with the oil inlet of the T mouths and oil cylinder of the first quick closing valve magnetic valve and the second quick closing valve magnetic valve respectively
It is logical；
The B mouths of first inserted valve and the second inserted valve respectively with the T mouths of the servo valve and entering for the oil cylinder
Hydraulic fluid port is connected, the A mouths of first inserted valve and the second inserted valve respectively with the B mouths of the servo valve and the fuel outlet and
Buffer hydraulic fluid port connection；
The spring is set in outside the piston rod of the oil cylinder, and the valve is arranged at the piston rod top；
Institute's displacement sensors are connected with the piston rod and the industrial computer of the oil cylinder respectively, are lived for measuring servomotor
The stroke change of plug, and stroke variable quantity is converted into stroke signal is delivered to the industrial computer；
The input of the industrial computer is connected with institute's displacement sensors and oil cylinder fuel outlet respectively, the rheme for receiving
The fuel injection pressure signal that the stroke signal and fuel outlet conveying that displacement sensor conveying comes come, output end and the servo card
Connection, for exporting electric control signal to the servo card；
Described servo valve one end connects the servo card, and the other end connects first inserted valve and the second inserted valve, uses
In the electric control signal from the servo card is converted into voltage signal, and then control the oil inlet quantity of oil inlet.
Further, in normal conditions, the first quick closing valve magnetic valve and the second quick closing valve magnetic valve keep powered, high pressure liquid
Force feed passes through filter, by two powered the first quick closing valve magnetic valves and the second quick closing valve magnetic valve, reach the first inserted valve and
Second inserted valve, because oil pressure is very high, the first inserted valve and the second inserted valve are turned off, the first inserted valve and the second inserted valve
A and B mouthfuls is obstructed, and the path between the oil inlet and fuel tank of the oil cylinder is off,
After the servo valve obtains the control signal of Open valve from the servo card, the valve element of the servo valve is right
Move, high pressure liquid force feed enters the porch of the oil cylinder from the servo valve by fuel outlet and buffering hydraulic fluid port, the oil cylinder
Input pressure is raised, and high pressure liquid force feed overcomes spring and frictional resistance, and the valve is driven by the piston rod in the oil cylinder
Motion, realizes that the aperture of the valve is opened；
When the servo valve obtains the control signal of closing valve from the servo card, the valve element of the servo valve is left
Move, the oil inlet of the oil cylinder is connected with the fuel tank, the valve is closed.
Further, when being in an emergency, the valve rapid-closing, by disconnect the first quick closing valve magnetic valve or
Second quick closing valve magnetic valve or the two disconnect, the high pressure liquid of oil pump force feed passes through the filter, passes through the first quick closing valve
Magnetic valve and the second quick closing valve magnetic valve so that the top of the first inserted valve and the second inserted valve keeps high pressure, the first inserted valve and
Connected between A and B mouthfuls of second inserted valve, the oil inlet of the oil cylinder is connected with the fuel tank, realizes quick draining, and in bullet
In the presence of spring force, the piston rod in the oil cylinder is moved to right rapidly, drives the valve to close, so as to realize quick closing valve.
Further, in addition to buffer unit, the buffer unit is arranged on the piston rod of the oil cylinder, for reducing
The movement velocity of piston rod realizes that the low speed of the valve is closed with this.
Further, in addition to pressure sensor, the pressure sensor is connected with the oil cylinder, for measuring the oil
Buffer cavity pressure, inlet pressure and the recycle muzzle pressure of motivation.
Further, the industrial computer also includes control output module, data acquisition module, filtering process module, algorithm
Computing module, data disaply moudle, report generation module and print module.
It is preferred that, the data acquisition module is data collecting card, and the data collecting card is used with many of isolation features
Performance data capture card.
It is preferred that, the first quick closing valve magnetic valve and the second quick closing valve magnetic valve are 22 three-way electromagnetic valves, and the servo valve is 2
3 three-way electromagnetic valves of position.
It is preferred that, institute's displacement sensors use the linear differential displacement sensor of LVDT types, and the LVDT types are linear
Differential displacement sensor includes iron core and coil rack, and the iron core is connected on the piston of the servomotor, the coil bone
Frame is connected on the housing of the servomotor.
The present invention is allowed to compared with prior art, have the following advantages that and actively imitate due to using above technical scheme
Really：
Performance testing device of the present invention is used for quick closing's time, open and close performance, the spring of servomotor for testing servomotor
The parameter of frictional force size between power size, servomotor piston and oil cylinder, and by these parameters carry out analysis calculating after with report
The form of table is preserved in a device, convenient access.The present invention is perfect to the test function of servomotor, surveys data accurately, practical
Property is strong.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment
Accompanying drawing be briefly described.It is clear that drawings in the following description are only some embodiments of the present invention, for ability
For field technique personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.It is attached
In figure：
Fig. 1 is the servomotor fundamental diagram in a kind of special servomotor performance testing device of Steam Turbine of the invention；
Fig. 2 is the servomotor SERVO CONTROL square frame in a kind of special servomotor performance testing device of Steam Turbine of the invention
Figure；
Fig. 3 is the servomotor fast trip test program in a kind of special servomotor performance testing device of Steam Turbine of the invention
Block diagram；
Fig. 4 is the Software for Design module frame chart in a kind of special servomotor performance testing device of Steam Turbine of the invention.
【Primary symbols explanation】
1- the first quick closing valve magnetic valves；2- the second quick closing valve magnetic valves；The inserted valves of 3- first；The inserted valves of 4- second；5- servo valves；
6- filters；7- oil pumps；8- fuel tanks；9- valves；10- springs；11- oil cylinders；12- fuel outlets；13- buffers hydraulic fluid port；14- displacements are passed
Sensor；15- industrial computers；16- servo cards.
Embodiment
Below with reference to the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The main test device given for servomotor performance detection of the invention, including hardware design and Software for Design.
Mainly for detection of the overshoot in the fast shut-off characteristic of servomotor, spring force size, servomotor frictional force size, servomotor stroke
With overshoot time.The experiment that its test device can be completed has：Fast trip test, oil test, open and close experiment.The test is filled
That puts builds, and is mainly solved by following technical proposals：
As shown in figure 1, the invention discloses a kind of special servomotor performance testing device of Steam Turbine, including first fast
Powered-down magnet valve 1, the second quick closing valve magnetic valve 2, the first inserted valve 3, the second inserted valve 4, servo valve 5, filter 6, oil pump 7, fuel tank
8th, valve 9, spring 10, oil cylinder 11, fuel outlet 12, buffering hydraulic fluid port 13, displacement transducer 14, industrial computer 15 and servo card 16, its
In：
The oil pump 7 is after the filter 6 respectively with the first quick closing valve magnetic valve 1, the second quick closing valve magnetic valve 2 and watching
Take the P mouths connection of valve 5；
The fuel tank 8 respectively with the first quick closing valve magnetic valve 1 and the T mouths of the second quick closing valve magnetic valve 2 and entering for oil cylinder 11
Hydraulic fluid port is connected；
The T mouths and the oil cylinder 11 of the B mouths of the inserted valve 4 of first inserted valve 3 and second respectively with the servo valve 5
Oil inlet connection, the A mouths of the inserted valve 4 of the first inserted valve 3 and second respectively with the B mouths of the servo valve 5 and described
Fuel outlet 12 is connected with buffering hydraulic fluid port 13；
The spring 10 is set in outside the piston rod of the oil cylinder 11, and the valve 9 is arranged at the piston rod top；
Institute's displacement sensors 14 are connected with the piston rod and the industrial computer 15 of the oil cylinder 11 respectively, for measuring oil
The stroke change of motivation piston, and stroke variable quantity is converted into stroke signal is delivered to the industrial computer 15；
The input of the industrial computer 15 is connected with institute displacement sensors 14 and oil cylinder fuel outlet 12 respectively, for receiving
Institute's displacement sensors 14 convey the stroke signal that comes and the fuel outlet 12 conveys the fuel injection pressure signal come, output end with
The servo card 16 is connected, for exporting electric control signal to the servo card 16；
Described one end of servo valve 5 connects the servo card 16, and the other end connects the inserted valve of the first inserted valve 3 and second
4, for the electric control signal from the servo card 16 to be converted into voltage signal, and then control the oil inlet quantity of oil inlet.
With reference to accompanying drawing 1, the fundamental diagram of servomotor testing stand.In normal conditions, the first quick closing valve magnetic valve 1 and second
Quick closing valve magnetic valve 2 keeps powered, and high pressure liquid force feed passes through filter 6, passes through the first powered quick closing valve magnetic valve 1 and the second quick closing valve
Magnetic valve 2, reaches the first inserted valve 3 and the second inserted valve 4, because oil pressure is very high, the first inserted valve 3 and the second inserted valve 4 are equal
Close, therefore A and B mouthfuls of the first inserted valve 3 and the second inserted valve 4 are obstructed, between the oil inlet and fuel tank 8 of the oil cylinder 11
Path is off.At the same time, when the servo valve 5 obtains the control letter of Open valve 9 from the servo card 16
After number, the valve element of the servo valve 5 is moved to right, and high pressure liquid force feed is entered from the servo valve 5 by fuel outlet 12 and buffering hydraulic fluid port 13
Enter the porch of the oil cylinder 11, the input pressure rise of the oil cylinder 11, high pressure liquid force feed overcomes spring 10 and frictional resistance,
Drive the valve 9 to move by the piston rod in the oil cylinder 11, realize that the aperture of the valve 9 is opened；When the servo
Valve 5 obtains the control signal for closing valve 9 from the servo card 16, and the valve element of the servo valve 5 is moved to left, the oil cylinder 11
Oil inlet is connected with the fuel tank 8, and the valve 9 is closed.
When being in an emergency, such as removal of load is, it is necessary to which the quick closedown of the valve 9, now fast powered-down by disconnecting first
Magnet valve 1 either the second quick closing valve magnetic valve 2 or the two disconnect, such as Fig. 1, now the oil pump 7 high pressure liquid force feed passes through institute
Filter 6 is stated, passes through the first quick closing valve magnetic valve 1 and the second quick closing valve magnetic valve 2 so that the first inserted valve 3 and the second inserted valve 4
Top keeps high pressure, is connected between the first inserted valve 3 and A and B mouthfuls of the second inserted valve 4, therefore, the oil inlet of the oil cylinder 11
It is connected with the fuel tank 8, realizes quick draining, and under spring force, the piston rod in the oil cylinder 11 is moved to right rapidly,
The valve 9 is driven to close, so as to realize quick closing valve.
During quick closing valve, because the active force of the spring 10 is generally very big, the hard hit of the valve 9 door wall can be caused, such as
Fruit takes no action to, and very big loss will certainly be caused to the valve 9 and whole system, while it is hidden to there is huge safety
Suffer from.So, design buffer unit is necessary, i.e. the test device also includes buffer unit (not shown), the buffering dress
Install and be placed on the piston rod of the oil cylinder 11, realize the low speed of the valve 9 with this for reducing the movement velocity of piston rod
Close.In Fig. 1, when piston quick closing valve is moved to right, the hydraulic oil started in piston can be from fuel outlet 12 and 13 liang of hydraulic fluid port of buffering
Locate choke valve fuel-displaced, piston quick closedown simultaneously, when the buffer plunger of piston moves to closing choke valve, hydraulic oil can only be from
Buffer hydraulic fluid port 13 fuel-displaced, due to the buffering obvious throttling action of hydraulic fluid port 13, remaining oil forms strong reaction force, forces work
Plug continues to move to right, so as to reduce piston movement speed, realizes that the low speed of valve 9 is closed.
As shown in Figure 2, the hardware platform system of this test device is complicated except setting up for the control principle of the test device
Data acquisition, analysis, display, so as to the performance to servomotor reflected and study outside, it is right also by using servo card 16
Whole servomotor system realizes closed-loop control, so as to realize any control to the aperture of valve 9, our related ginsengs are completed to design
Number measurement experiment.Its control principle block diagram is as shown in Figure 2.
Further, the test device also includes pressure sensor (not shown), the pressure sensor and the oil
Cylinder 11 is connected, buffer cavity pressure, inlet pressure and recycle muzzle pressure for measuring the servomotor.In the present embodiment, institute
State pressure measurement range the covering 0-250bar, output signal 4-20mA of pressure sensor.According to servomotor type in actual use
Number difference, enters oil pressure range also different, it is necessary to according to hydrostatic sensors of the actual conditions from different measurement grades in it.
It is preferred that, the data acquisition module is data collecting card, and the data collecting card is used with many of isolation features
Performance data capture card, accurately measures and is precisely controlled for providing.Wherein, isolation performance includes：Instantly safe, denoising,
The circulation of reduction ground connection, suppression common mode voltage.In the present embodiment, the data collecting card is used and upper computer software interface compatibility
Strong high-speed collection card, to adapt to the requirement of high speed acquisition, requires that sample rate is higher than 1000Hz data collecting card here.
It is preferred that, the first quick closing valve magnetic valve 1 and the second quick closing valve magnetic valve 2 are 22 three-way electromagnetic valves, the servo valve 5
For 23 three-way electromagnetic valves.
It is preferred that, institute's displacement sensors 14 are using LVDT (Linear Variable Differential
Transformer, linear variable difference transformer) the linear differential displacement sensor of type, the linear differential position of LVDT types
Displacement sensor includes iron core and coil rack, and the iron core is connected on the piston of the servomotor, the coil rack connection
In on the housing of the servomotor.When measuring servomotor piston position, operation principle is：When servomotor piston movement so that
Iron core produces relative displacement with coil, and induced electromotive force is produced inside it, and the voltage swing depends on the size of displacement.Sense
The displacement of servomotor piston can also be drawn by answering the output of electromotive force.The linear differential position of the LVDT types is used in the present embodiment
Displacement sensor is measured, and is that the displacement sensor precision is high, range is also suitable for the stroke of servomotor piston.
In electric control system, the servo card 16 plays an important roll in servomotor control system, utilizes PID control
Algorithm, is controlled to the servo valve 5 of servomotor, due to controlling closed loop to be negative feedback control, so in servo card 16 and servo
Under the collective effect of valve 5, servomotor piston can be achieved and stops at an arbitrary position.
In the present embodiment, the servo card 16 includes two parts, and a part is I/O cards, includes whole servo card 16
Input and output par, c, ADC analog-to-digital conversions part is switched to LVDT feedbacks, DEH importations through passage, and below
DAC digital-to-analogue conversions are exported to electric current, while also contains short-term detection.Another part is CPU board, and mainly including to compile
Journey logical device and single-chip microcomputer are to CPU loop section, 4-20mA valves position output display, supply voltage modular converter etc..The servo card
16 be the single-chip microcomputer designed based on ARM plates.It can receive input signal, computing and arrive output data, and its internal processes can be
Modified on the mcu programming platform designed for ARM boards.
Servomotor is severe using live general environment, and vibrations are larger with noise, and temperature change is also big, the wire of signal transmission
It is general long, cause signal easily to receive interference in transmittance process, in order to keep the stabilization of collection fastener safety and signal
Property, it is necessary to using signal isolator in the building of test device.Can effectively improve input by using signal isolator, it is defeated
The electrical isolation performance gone out between power supply.In the present embodiment, the signal isolator (not shown) is generally using with shielding
Cable, isolated amplifier of function etc..
After the design of hardware components of servomotor test device is completed, in addition it is also necessary to which software is designed.The present invention
Realize the software programming of control program and interactive interface.Software for Design can be divided into following components：Control output, data are adopted
Collect preservation, filtering process, algorithm calculating, data display, report generation, printing, the specific Software for Design flow chart such as institute of accompanying drawing 3
Show.Those software function modules are mainly arranged in the industrial computer.That is, described industrial computer 14 also include control output module,
Data acquisition module, filtering process module, algorithm computing module, data disaply moudle, report generation module and print module.
In servomotor performance testing device, it would be desirable to measure stroke signal, buffer cavity pressure signal and some monitorings
Signal, these road signals are analog current signal；Meanwhile, in order to be controlled to servomotor test device, we will export
Number control signal：The switching signal of such as magnetic valve, the control signal of servo valve, needing exist for three road DO signals is used to control
Three magnetic valves and all the way AO signals are used to control servo valve.Every piece of AI passage using two-way of data collecting card, so hard
RTSI bus cables are needed on part, the cable can connect the RTSI Bussing connectors on measurement, vision, motion and CAN boards, firmly
The programming realization on software is also needed to after connecting on part to connect.
Accompanying drawing 4 shows the FB(flow block) of fast trip test design.From flow chart as can be seen that Software for Design can be divided into it is as follows
Several parts：Control output, data acquisition preservation, filtering process, algorithm calculating, data display, report generation, printing etc..
First, program can perform a series of initial codes, remind user to input various data storage paths, form and preserve road
Footpath etc..Meanwhile, when doing different experiments, it is required to input different initial setting up, this powerful interactive operation interface
Facilitate easy-to-use.
Secondly, after initialization, whole program will wait data acquisition, now, and program needs to produce magnetic valve, servo valve
Deng the control signal of control executive item.
3rd, the experiment model that control signal drives quick closing valve, oil pressure, open and close, step response different starts, and capture card is adopted
Collect after data, on the one hand initial data has been preserved, so as to follow-up off-line operation, on the other hand, carried out online parameter
Calculate and analyze.During on-line analysis, processing is first filtered to initial data, afterwards, in eight kinds of different collection moulds
Under formula, the computing of algorithm is carried out, the measurement parameter under experiment model is calculated, and preserved.
4th, using the data collected, off-line analysis processing, particularly waveform processing are carried out, waveform needs smoothly, this
Filtering method not of the same race can be used in mileage sequence, such as first-order lag filter method, Bath irrigate pass filter method.Obtain different mode
Under graph image and preservation.
Finally, the servomotor parameter and graph image experiment measured using reporting system module is directed respectively into existing mould
In blackboard newspaper table, complete laboratory report is obtained.Masterplate form is convenient to print and in other computers according to EXCEL forms are designed as
Preservation in equipment is consulted.Finally, printing generation report.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (9)
1. the special servomotor performance testing device of a kind of Steam Turbine, it is characterised in that including the first quick closing valve magnetic valve, second
Quick closing valve magnetic valve, the first inserted valve, the second inserted valve, servo valve, filter, oil pump, fuel tank, valve, spring, oil cylinder, drain the oil
Mouth, buffering hydraulic fluid port, displacement transducer, industrial computer and servo card, wherein：
P of the oil pump after the filter respectively with the first quick closing valve magnetic valve, the second quick closing valve magnetic valve and servo valve
Mouth connection；
Oil inlet of the fuel tank respectively with the T mouths and oil cylinder of the first quick closing valve magnetic valve and the second quick closing valve magnetic valve is connected；
The T mouths and the oil inlet of the oil cylinder of the B mouths of first inserted valve and the second inserted valve respectively with the servo valve
Connection, the B mouths and the fuel outlet and buffering of the A mouths of first inserted valve and the second inserted valve respectively with the servo valve
Hydraulic fluid port is connected；
The spring is set in outside the piston rod of the oil cylinder, and the valve is arranged at the piston rod top；
Institute's displacement sensors are connected with the piston rod and the industrial computer of the oil cylinder respectively, for measuring servomotor piston
Stroke changes, and stroke variable quantity is converted into stroke signal is delivered to the industrial computer；
The input of the industrial computer is connected with institute's displacement sensors and oil cylinder fuel outlet respectively, is passed for receiving the displacement
The fuel injection pressure signal that the stroke signal and fuel outlet conveying that sensor conveying comes come, output end connects with the servo card
Connect, for exporting electric control signal to the servo card；
Described servo valve one end connects the servo card, and the other end connects first inserted valve and the second inserted valve, for inciting somebody to action
Electric control signal from the servo card is converted to voltage signal, and then controls the oil inlet quantity of oil inlet.
2. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that just
Under normal operating mode, the first quick closing valve magnetic valve and the second quick closing valve magnetic valve keep powered, and high pressure liquid force feed passes through filter, passes through two
Individual powered the first quick closing valve magnetic valve and the second quick closing valve magnetic valve, reach the first inserted valve and the second inserted valve, due to oil pressure very
Height, the first inserted valve and the second inserted valve are turned off, and A and B mouthfuls of the first inserted valve and the second inserted valve are obstructed, the oil cylinder
Path between oil inlet and fuel tank is off,
After the servo valve obtains the control signal of Open valve from the servo card, the valve element of the servo valve is moved to right,
High pressure liquid force feed enters the porch of the oil cylinder, the oil-feed of the oil cylinder from the servo valve by fuel outlet and buffering hydraulic fluid port
Pressure rise, high pressure liquid force feed overcomes spring and frictional resistance, and the valve motion is driven by the piston rod in the oil cylinder,
Realize that the aperture of the valve is opened；
When the servo valve obtains the control signal of closing valve from the servo card, the valve element of the servo valve is moved to left, institute
The oil inlet for stating oil cylinder is connected with the fuel tank, and the valve is closed.
3. a kind of special servomotor performance testing device of Steam Turbine according to claim 1, it is characterised in that when going out
During existing emergency, the valve rapid-closing, by disconnecting the first quick closing valve magnetic valve or the second quick closing valve magnetic valve or two
Person disconnects, and the high pressure liquid force feed of the oil pump passes through the filter, passes through the first quick closing valve magnetic valve and the second quick closing valve electromagnetism
Valve so that A the and B mouths of the top holding high pressure of the first inserted valve and the second inserted valve, the first inserted valve and the second inserted valve
Between connect, the oil inlet of the oil cylinder is connected with the fuel tank, realizes quick draining, and under spring force, the oil
Piston rod in cylinder is moved to right rapidly, drives the valve to close, so as to realize quick closing valve.
4. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that also wrap
Buffer unit is included, the buffer unit is arranged on the piston rod of the oil cylinder, for reducing the movement velocity of piston rod with this
Realize that the low speed of the valve is closed.
5. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that also wrap
Pressure sensor is included, the pressure sensor is connected with the oil cylinder, buffer cavity pressure, oil-feed for measuring the servomotor
Mouth pressure and recycle muzzle pressure.
6. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that described
Industrial computer also include control output module, data acquisition module, filtering process module, algorithm computing module, data disaply moudle,
Report generation module and print module.
7. the special servomotor performance testing device of a kind of Steam Turbine according to claim 6, it is characterised in that described
Data acquisition module is data collecting card, and the data collecting card uses the multifunctional data acquisition card with isolation features.
8. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that described
First quick closing valve magnetic valve and the second quick closing valve magnetic valve are 22 three-way electromagnetic valves, and the servo valve is 23 three-way electromagnetic valves.
9. the special servomotor performance testing device of a kind of Steam Turbine according to claim 1, it is characterised in that described
Displacement transducer uses the linear differential displacement sensor of LVDT types, and the linear differential displacement sensor of LVDT types includes iron
Core and coil rack, the iron core are connected on the piston of the servomotor, and the coil rack is connected to the servomotor
On housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519028.XA CN107237796A (en) | 2017-06-29 | 2017-06-29 | A kind of special servomotor performance testing device of Steam Turbine |
Applications Claiming Priority (1)
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| KR20200112472A (en) * | 2019-03-22 | 2020-10-05 | 주식회사 에네스지 | Method for testing quick closing of actuator for power plant |
| CN111927572A (en) * | 2020-06-18 | 2020-11-13 | 华电电力科学研究院有限公司 | System and method for measuring total closing time of steam turbine regulating valve |
| CN112268135A (en) * | 2020-11-06 | 2021-01-26 | 中国兵器装备集团自动化研究所 | Control method and device applied to three-position five-way electromagnetic valve |
| CN112901598A (en) * | 2021-01-29 | 2021-06-04 | 上海电气燃气轮机有限公司 | Gas turbine hydraulic actuating mechanism testing method, electronic terminal and storage medium |
| CN114704388A (en) * | 2022-04-08 | 2022-07-05 | 西安交通大学 | Gas turbine fuel regulating valve, control system and control method |
| WO2022237917A1 (en) * | 2021-11-22 | 2022-11-17 | 中广核工程有限公司 | Method for diagnosing performance of control valve of steam turbine of nuclear power station, and storage medium and computer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20200112472A (en) * | 2019-03-22 | 2020-10-05 | 주식회사 에네스지 | Method for testing quick closing of actuator for power plant |
| KR102169666B1 (en) | 2019-03-22 | 2020-10-26 | 주식회사 에네스지 | Method for testing quick closing of actuator for power plant |
| CN111927572A (en) * | 2020-06-18 | 2020-11-13 | 华电电力科学研究院有限公司 | System and method for measuring total closing time of steam turbine regulating valve |
| CN111927572B (en) * | 2020-06-18 | 2022-07-05 | 华电电力科学研究院有限公司 | System and method for measuring total closing time of steam turbine regulating valve |
| CN112268135A (en) * | 2020-11-06 | 2021-01-26 | 中国兵器装备集团自动化研究所 | Control method and device applied to three-position five-way electromagnetic valve |
| CN112268135B (en) * | 2020-11-06 | 2022-11-15 | 中国兵器装备集团自动化研究所 | Control method and device applied to three-position five-way electromagnetic valve |
| CN112901598A (en) * | 2021-01-29 | 2021-06-04 | 上海电气燃气轮机有限公司 | Gas turbine hydraulic actuating mechanism testing method, electronic terminal and storage medium |
| WO2022237917A1 (en) * | 2021-11-22 | 2022-11-17 | 中广核工程有限公司 | Method for diagnosing performance of control valve of steam turbine of nuclear power station, and storage medium and computer |
| CN114704388A (en) * | 2022-04-08 | 2022-07-05 | 西安交通大学 | Gas turbine fuel regulating valve, control system and control method |
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