CN203081513U - Undisturbed switching system for control mode of main ship steam turbine - Google Patents
Undisturbed switching system for control mode of main ship steam turbine Download PDFInfo
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- CN203081513U CN203081513U CN 201320107417 CN201320107417U CN203081513U CN 203081513 U CN203081513 U CN 203081513U CN 201320107417 CN201320107417 CN 201320107417 CN 201320107417 U CN201320107417 U CN 201320107417U CN 203081513 U CN203081513 U CN 203081513U
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Abstract
The utility model provides an undisturbed switching system for the control mode of a main ship steam turbine. The undisturbed switching system comprises a main engine manipulator, a master controller, a steam adjusting valve controller and a change-over switch, wherein the main engine manipulator is connected with the master controller, the change-over switch comprises a valve position control gear and a rotating speed control gear, and the master controller is in communication connection with the steam adjusting valve controller respectively through the valve position control gear and the rotating speed control gear of the change-over switch; the undisturbed switching system is characterized in that the change-over switch is a three-position gear-type switch, a transition control gear is arranged between the valve position control gear and the rotating speed control gear and is electrically connected with the steam adjusting valve controller. The undisturbed switching system can keep the openness of a steam adjusting valve constant in the switching process of two gears, thus the pressure fluctuation of main steam before the valve, which is caused by a conventional switching method is avoided, and the stable running of a steam power device is maintained. The undisturbed switching system is suitable for the steam adjusting valves of various driving modes such as a direct-current motor, an alternating-current motor, a stepper motor, an electro-hydraulic actuator and an electro-hydraulic servo-motor and has a wide application range.
Description
Technical field:
The utility model belongs to boats and ships main steam turbine control field, is specifically related to a kind of switched system of undisturbed boats and ships main steam turbine control mode.
Background technique:
The control of boats and ships main steam turbine generally possesses valve position control and two kinds of telecontrol modes of rotating speed control simultaneously, and two kinds of control modes use same main frame manipulator to handle.When valve position was controlled, the main frame manipulator was used for the aperture of given main frame steam regulation valve controller, and the scale indication of main frame manipulator is corresponding with valve opening instruction linearity; When rotating speed was controlled, the main frame manipulator was used for given host object rotating speed, and the scale indication of main frame manipulator is corresponding with host object rotating speed linearity.
When the main frame valve position is controlled, behaviour's car personnel pass to master controller by the operating host manipulator with given scale value, master controller converts scale value by linear corresponding relation become the instruction of main frame steam regulation valve controller aperture, main control system steam regulation valve controller is by the aperture instruction operation, the flow through steam flow of main frame of adjusting, thereby main control system rotating speed; When engine speed is controlled, behaviour's car personnel pass to master controller by the operating host manipulator with given scale value, master controller is converted into the host object rotating speed with scale value by linear corresponding relation, automatically main frame steam regulation valve controller is adjusted to certain aperture by rotating speed PID logical operation, makes the main frame actual speed consistent with rotating speed of target.
The switching of existing boats and ships main steam turbine control mode is undertaken by the rotary switch of two formulas, two positions of switch are respectively valve position control and rotating speed control, master controller is given by electrical signal transfer in the switching position, and master controller adopts different logical operations according to the different switching position.Existing switching method is: when main frame runs on a certain steady working condition following time, directly rotary switch is threaded to the another location.Because under two kinds of control modes, two kinds of logical operations that basis sets in the master controller are converted into different computing inputs with the same given scale value of main frame manipulator, after two kinds of control modes are switched, the steam regulation valve controller aperture instruction that master controller sends is preceding different with switching, cause the aperture of main frame steam regulation valve controller to change, need the rapid operating host manipulator of behaviour car personnel to change given scale, make main frame come back to the rotating speed that switches preceding stable operation.Traditional switching method is in handoff procedure, and main frame steam regulation valve location of controls changes, and engine speed generation disturbance is unfavorable for system stable operation.
The model utility content:
For overcoming the deficiencies in the prior art, a kind of switched system of undisturbed boats and ships main steam turbine control mode is provided, between the valve position of throw over switch control shelves and rotating speed control shelves, be provided with transition control shelves, boats and ships traveling comfort when having improved valve position control shelves and rotating speed control shelves and changing mutually.
The technological scheme that the utility model provides is: the switched system of this undisturbed boats and ships main steam turbine control mode, comprise the main frame manipulator, master controller, steam regulation valve controller and throw over switch, the main frame manipulator connects master controller, described throw over switch comprises valve position control shelves and rotating speed control shelves, master controller is connected communication with rotating speed control shelves with the steam regulation valve controller by the valve position control shelves of throw over switch respectively, the technological scheme that adopts is: described throw over switch is three shelves formula switches, be provided with transition control shelves between valve position control shelves and the rotating speed control shelves, transition control shelves are electrically connected with the steam regulation valve controller.
The switching method that the utility model is related has following characteristics compared with prior art:
1. the utility model has been avoided the main steam turbine rotating speed disturbance that traditional switched system brings, and is provided with transition control shelves between valve position control shelves and rotating speed control shelves, can keep the mooring stability navigation in handoff procedure.
2. the steam regulation valve aperture remains unchanged fully in the utility model handoff procedure, and the preceding main steam pressure fluctuation of the valve of having avoided traditional switched system to bring is beneficial to the smooth running of maintenance steam power plant.
3. the utility model hardware implementation mode is on original control system, and two formula throw over switches are replaced by three shelves formula throw over switches and are increased a small amount of wiring, and hardware is easy to realize.
4. the utility model must be through being threaded to three shelves formula throw over switches the operation of transition control shelves in handoff procedure, and the misoperation of having avoided behaviour's car personnel directly to switch may.
5. the utility model is applicable to the steam regulation valve controller of multiple drive forms such as direct current generator, AC motor, stepper motor, electro-hydraulic actuator, electro-hydraulic servo oil engine, and using scope is wide.
Description of drawings:
Accompanying drawing is an electrical schematic diagram of the present utility model.
Embodiment:
With reference to accompanying drawing, the switched system of this undisturbed boats and ships main steam turbine control mode, comprise the main frame manipulator, master controller, steam regulation valve controller and throw over switch, the main frame manipulator connects master controller, described throw over switch comprises valve position control shelves and rotating speed control shelves, master controller is connected communication with rotating speed control shelves with the steam regulation valve controller by the valve position control shelves of throw over switch respectively, described throw over switch is three shelves formula switches, be provided with transition control shelves between valve position control shelves and the rotating speed control shelves, transition control shelves are electrically connected with the steam regulation valve controller.
The utility model is replaced by three shelves formula throw over switches with two traditional formula rotary switches, and position, the switch left and right sides is respectively valve position control shelves and rotating speed control shelves, and the neutral position is transition control shelves.The gear of switch is given master controller and steam regulation valve controller by electrical signal transfer.When switch gear during in both sides, the steam regulation valve controller receives the control signal that master controller is sent, when the switch gear when middle transitional control gear is put, the control signal that steam regulation valve controller shielding master controller is sent, receive the control signal that transition control shelves are sent, keep the aperture of steam regulation valve constant.For different steam regulation valve controllers, the effect difference of transition control: for the electro-hydraulic actuator that can receive analog amount control signal and switching value control signal simultaneously, the control signal that transition control is sent is the switching value control signal, and the electro-hydraulic actuator position remains unchanged; For stepper motor, the control signal that transition controller sends is the enable signal of stepper motor, i.e. transition when control stepper motor enables to be input as non-, and stepper motor stops action, and the position remains unchanged.Three kinds of control logic computings are set: valve position control computing, rotating speed control computing and transition control computing in the master controller, valve position control computing is used for the scale value that the main frame manipulator is given becomes the instruction of main frame steam regulation valve aperture by the linear corresponding relation conversion, main control system steam regulation valve controller is by the aperture instruction operation, the flow through steam flow of main frame of adjusting, thereby main control system rotating speed; Rotating speed control computing is used for scale value is converted into the host object rotating speed by linear corresponding relation, automatically the main frame steam regulation valve is adjusted to certain aperture by rotating speed PID logical operation, makes the main frame actual speed consistent with rotating speed of target; Transition control computing is used to receive the feedback signal of steam regulation valve aperture, the opening value linearity of steam regulation valve is converted into the output order of master controller.
Switch step is: at first three shelves formula throw over switches are threaded to the neutral position, i.e. and transition control shelves, the operating host manipulator is threaded to the target control mode with three shelves formula throw over switches at last to the target scale then, and switching finishes.Concrete handoff procedure and principle are as follows:
(1) main frame switches to rotating speed control by valve position control: three shelves formula throw over switches initially are positioned at valve position control shelves, at first three shelves formula throw over switches are threaded to middle transitional control shelves, the steam regulation valve controller received the control signal that transition control shelves send and kept the aperture of steam regulation valve constant this moment, the given host object rotating speed of operating host manipulator then, this moment, the aperture of master controller output tracking steam regulation valve also remained unchanged, at last three shelves formula throw over switches are threaded to rotating speed control shelves, this moment, master controller entered the rotating speed control mode, carry out rotating speed PID logical operation, because the given rotating speed of target of main frame manipulator is identical with actual speed, the deviate of the rotating speed PID of master controller is 0, master controller output remains unchanged, the aperture of main frame steam regulation valve also remains unchanged, and engine speed does not have disturbance.
(2) main frame switches to valve position control by rotating speed control: three shelves formula throw over switches initially are positioned at rotating speed control shelves, at first three shelves formula throw over switches are threaded to middle transitional control shelves, the steam regulation valve controller received the control signal that transition control shelves send and kept the aperture of steam regulation valve constant this moment, the linear corresponding manipulator scale of the given current steam regulation valve aperture of operating host manipulator then, this moment, master controller output tracking steam regulation valve aperture also remained unchanged, at last three shelves formula throw over switches are threaded to valve position control shelves, this moment, master controller entered the valve position control mode, master controller is output as the linear corresponding steam regulation valve opening value of main frame manipulator scale of this moment, be that the steam regulation valve aperture remains unchanged, engine speed does not have disturbance.
Below by two embodiments embodiment of the present utility model is described further:
Embodiment 1
0～200 rev/min of certain type ship oceangoing ship main steam turbine design speed scope, corresponding main frame manipulator scale is 0～200 rev/min, and corresponding steam regulation valve controller aperture is 0～100%, and the steam regulation valve controller is an electro-hydraulic actuator.Design three shelves formula rotary switches, position, the rotary switch left and right sides is respectively valve position control shelves and rotating speed control shelves, and the neutral position is transition control shelves.The switch gear is given the control box of master controller and electro-hydraulic actuator by electrical signal transfer.When switch is positioned at the valve position control shelves of both sides and rotating speed control grade, the control box of electro-hydraulic actuator receives the control signal that master controller is sent, when switch is positioned at middle transitional control shelves, the control signal that the control box shielding master controller of electro-hydraulic actuator is sent, receive the control signal that transition control shelves are sent, the electro-hydraulic actuator holding position is constant, and the steam regulation valve position remains unchanged.
When this type ship oceangoing ship main steam turbine with the stable operation of rotating speed control mode in 120 rev/mins, the electro-hydraulic actuator aperture is 50% o'clock, the step that switches to the valve position control mode is as follows: at first three shelves formula rotary switches are threaded to middle transitional control shelves, this moment, the control box of electro-hydraulic actuator received the control signal that transition control shelves are sent, keep electric heating final controlling element aperture constant, the steam regulation valve position remains unchanged, the operating host manipulator is given to the linear corresponding manipulator scale place of electro-hydraulic actuator aperture, that is: then
200 rev/mins * 50%=100 rev/min
This moment, master controller output tracking electro-hydraulic actuator aperture also remained unchanged, and at last three shelves formula rotary switches was threaded to valve position control shelves, and master controller is output as the linear corresponding steam regulation valve opening value of main frame manipulator scale (100 rev/mins) of this moment, that is:
(100 rev/mins ÷ 200 rev/mins) * 100%=50%
With identical before the switching, engine speed does not have disturbance.
Embodiment 2
0～250 rev/min of certain type ship oceangoing ship main steam turbine design speed scope, corresponding main frame manipulator scale is 0～250 rev/min, and corresponding steam regulation valve aperture is 0～100%, and the actuator of steam regulation valve controller is a stepper motor.Design three shelves formula rotary switches, position, the switch left and right sides is respectively valve position control and rotating speed control, and the neutral position is transition control.The switch gear is given master controller and Stepping Motor Control case by electrical signal transfer.When switch was positioned at both sides, the Stepping Motor Control case received the control signal that master controller is sent, and when switch was positioned at transition control shelves, control box received the emergency position signal, enabled to be input as non-, and stepper motor stops action.
When this type ship oceangoing ship main steam turbine with the stable operation of valve position control mode in 200 rev/mins, the steam regulation valve aperture is 65% o'clock, the step that switches to the rotating speed control mode is as follows: at first three shelves formula rotary switches are threaded to the neutral position, this moment, the Stepping Motor Control case received transition control signal, stepper motor enables to be input as non-, stepper motor stops action, the steam regulation valve position remains unchanged, the given current rotating speed of operating host manipulator place then, i.e. 200 rev/mins of scale places, this moment, master controller output tracking steam regulation valve aperture also remained unchanged, at last three shelves formula rotary switches are threaded to rotating speed control gear and put, this moment, master controller entered the rotating speed control mode, carried out rotating speed PID logical operation, because the given rotating speed of target of main frame manipulator is identical with actual speed, the deviate of the rotating speed PID of master controller is 0, and master controller output remains unchanged, and stepper motor is failure to actuate, the steam regulation valve position remains unchanged, and engine speed does not have disturbance.
Claims (1)
1. the switched system of a undisturbed boats and ships main steam turbine control mode, comprise the main frame manipulator, master controller, steam regulation valve controller and throw over switch, the main frame manipulator connects master controller, described throw over switch comprises valve position control shelves and rotating speed control shelves, master controller is connected communication with rotating speed control shelves with the steam regulation valve controller by the valve position control shelves of throw over switch respectively, it is characterized in that: described throw over switch is three shelves formula switches, be provided with transition control shelves between valve position control shelves and the rotating speed control shelves, transition control shelves are electrically connected with the steam regulation valve controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320107417 CN203081513U (en) | 2013-03-11 | 2013-03-11 | Undisturbed switching system for control mode of main ship steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320107417 CN203081513U (en) | 2013-03-11 | 2013-03-11 | Undisturbed switching system for control mode of main ship steam turbine |
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| Publication Number | Publication Date |
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| CN203081513U true CN203081513U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320107417 Expired - Fee Related CN203081513U (en) | 2013-03-11 | 2013-03-11 | Undisturbed switching system for control mode of main ship steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114878A (en) * | 2013-03-11 | 2013-05-22 | 中国船舶重工集团公司第七�三研究所 | Non-disturbance switching system of boat main steam turbine control manner |
-
2013
- 2013-03-11 CN CN 201320107417 patent/CN203081513U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114878A (en) * | 2013-03-11 | 2013-05-22 | 中国船舶重工集团公司第七�三研究所 | Non-disturbance switching system of boat main steam turbine control manner |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20140311 |