CN203548054U - Hydraulic device for water turbine speed control and protection system - Google Patents
Hydraulic device for water turbine speed control and protection system Download PDFInfo
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- CN203548054U CN203548054U CN201320583410.4U CN201320583410U CN203548054U CN 203548054 U CN203548054 U CN 203548054U CN 201320583410 U CN201320583410 U CN 201320583410U CN 203548054 U CN203548054 U CN 203548054U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a hydraulic device for a water turbine speed control and protection system. The hydraulic device comprises a guide vane control valve set and a wheel vane control valve set, the guide vane control valve set and the wheel vane control valve set connected with a pressure oil resource are connected with a guide vane servomotor and a wheel vane servomotor respectively; the hydraulic device further comprises a purely-mechanical hydraulic overspeed protection device, an emergency stop loop and emergency/accident shutdown valve sets, the emergency stop loop is serially connected between the guide vane control valve set and the guide vane servomotor, the purely-mechanical hydraulic overspeed protection device is sequentially connected with the emergency/accident shutdown valve sets, shutdown information input ends of the emergency/accident shutdown valve sets are connected with a shutdown information input end of the guide vane control valve set, a shutdown information input end of the emergency stop loop and a shutdown information input end of the wheel vane control valve set. The hydraulic device is high in applied pressure, small in size, simple and convenient to arrangement and attractive in appearance, and the servomotors and pipelines are downsized; a medium-pressure air compensation system is omitted, cost is greatly reduced and space is saved; the hydraulic device is supportive of large-scale application and promotion.
Description
Technical field
The utility model relates to water turbine field, specifically a kind of water turbine governing of middle high oil pressure and hydraulic pressure installation of protective system of being applied to.
Background technique
Mechanical-hydraulic followup device is a part for whole hydraulic turbine control system, is a kind of followup device that connects guide vanes of water turbine/wheel blade servomotor and electric control system, is the actuator of hydraulic turbine control system.Hydraulic turbine control system has obtained significant progress in recent years, and it is ripe that product tends to more, and performance also reaches higher level.Current hydraulic turbine control system actuator principal mode has: several forms such as electro-control converter (containing Proportional valve)+main control valve, stepper motor+main control valve, the direct driving of actuating motor, wherein belong to first two application comparatively extensive.The main control valve of using in these two kinds of structures is divided into two kinds of the international renowned company of the independent development He Cong of domestic manufacturer imports, but in any case, all belong to Single unit job lot production, and body size is larger, difficult quality control, thereby often causing the unit that uses identical main valve size, the regulation quality of the different units in even same power station is difficult to unified, and cost is higher.
Because current most of speed control systems adopt main control valve structure, applicable pressure is lower simultaneously, and system needs oil mass larger, is the non-isolated pressurized tank of the many employings of oil gear of this system fuel feeding, and volume is generally at 1m
3～40m
3not etc., also need special middle pressure air compensating system is set, therefore bulky, to arrange inconvenience, and be all greatly to have increased cost from factory building cost and equipment purchasing aspect, its system architecture is as shown in Figure 10.
Summary of the invention
The purpose of this utility model is: provide the hydraulic pressure installation of a kind of water turbine governing and protective system, for water turbine governing hydraulic control system provides a complete set of safe and reliable solution.
The technological scheme that the utility model adopts is:
A hydraulic pressure installation for water turbine governing and protective system, comprises the guide vane control valve group and the wheel blade control valve group that are connected with pressure oil-source, and guide vane control valve group is connected respectively guide vane servomotor and wheel blade servomotor with wheel blade control valve group; Described hydraulic pressure installation also comprises pure mechanical hydraulic overspeed protection device, accidental shutdown loop and urgent/accidental shutdown control valve group; accidental shutdown loop is connected between guide vane control valve group and guide vane servomotor; pure mechanical hydraulic overspeed protection device is connected successively with urgent/accidental shutdown hydraulic control valve group, and the urgent/stopping signal output terminal of accidental shutdown hydraulic control valve group is connected with the accidental shutdown signal input part in the shutdown control signal input end of guide vane control valve group, accidental shutdown loop and the shutdown control signal input end of wheel blade control valve group.
Described urgent/accidental shutdown hydraulic control valve group comprises accidental shutdown solenoid valve, accidental shutdown control pilot operated directional control valve and emergency shutdown solenoid valve; pure mechanical hydraulic overspeed protection device end connects accidental shutdown solenoid valve; the control chamber of accidental shutdown solenoid valve end emergency shutdown solenoid valve in parallel and accidental shutdown control pilot operated directional control valve; the output terminal of emergency shutdown solenoid valve connects guide vane control valve group and wheel blade control valve group, and the output terminal of accidental shutdown control pilot operated directional control valve connects accidental shutdown loop.
Described accidental shutdown solenoid valve, accidental shutdown control pilot operated directional control valve and emergency shutdown solenoid valve are integrated on a hydraulic valve block.
Described accidental shutdown loop is integrated on a hydraulic valve block and is formed by two cartridge valves, and one of them cartridge valve is connected between guide vane control valve group and guide vane servomotor, the output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group; Another cartridge valve is connected in parallel between the input end and the above-mentioned cartridge valve output terminal being connected in series of guide vane servomotor, and the output terminal of this cartridge valve is connected to oil return, another output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group.
Described stator/wheel blade control valve group comprises: the leading type servo proportion of pilot valve and the supporting formation of main valve and stator/wheel blade emergency shutdown hydraulic control unit, stator/wheel blade emergency shutdown hydraulic control unit is that several are arranged on the leading control one-way valve on oil circuit control between pilot valve and main valve.
In described stator emergency shutdown hydraulic control unit, there are 4 leading control one-way valves, be separately positioned on: by pilot valve, be connected on two oil circuit controls of main valve control chamber, by main valve on pilot valve oil feeding line and promote on oil circuit control that valve core of main valve closes.
In described wheel blade emergency shutdown hydraulic control unit, there are 3 leading control one-way valves, be separately positioned on: by pilot valve, be connected on two oil circuit controls of main valve control chamber and by main valve on first valve oil feeding line.
The leading control one-way valve of described stator/wheel blade emergency shutdown hydraulic control unit is integrated on a hydraulic valve block.
The beneficial effect that the utility model produces is:
The hydraulic pressure installation of water turbine governing of the present utility model and protective system; a kind of hydrogovernor and shutdown protector based on leading type servo proportion; its major control element adopts leading type servo proportion, while improving for system pressure the replacement of main control valve and unit urgent/accidental shutdown protection provides a complete set of safe and reliable solution.The utility model adopts the standardized product leading type servo proportion of professional hydraulic element manufacturers produce as the major control element of speed regulator, its basic electro-hydraulic converting element is servo proportion, the main valve that secondary amplifies use integrates with it, thereby the speed regulator of this structure arranges that more compact, applicable pressure reaches as high as 35MPa, peak rate of flow 3000L/min.Because having adopted standardized control unit, the regulation quality of system is also effectively promoted, is moved more reliable.
The utility model has been installed emergency shutdown hydraulic control unit innovatively between the pilot valve of stator/wheel blade control leading type servo proportion and main valve; make this speed control system the same with conventional main control valve Structure Speed Control System; possesses the first class of protection function of accepting the control of external switch amount and make unit emergency shutdown; effectively simplify the structure of speed control system, but do not reduced its safety protection function.
Stator/wheel blade emergency shutdown hydraulic control unit that the utility model adopts; adopting respectively four/tri-leading control one-way valve plug-in mountings to be integrated on a hydraulic valve block forms; the attachment face up and down of its valve piece meets GB/T 2514 and ISO 4401 standards; upper and lower surperficial hydraulic fluid port is connected hydraulic fluid port with the pilot valve of master element and main valve respectively and directly docks, not for the connecting plate of interface transition.
Accident stoppage protection function that the utility model is integrated; when systematic failures is shut down, stator control section can cut off the automatic control hydraulic oil from master element, and makes guide vane servomotor SM001 open chamber connection oil return; guide vane servomotor is closed under the Action of Gravity Field of weight, compressor emergency shutdown.
Promptly/accidental shutdown hydraulic control valve group that the utility model is integrated; this loop is integrated on a hydraulic valve block and is formed by emergency shutdown solenoid valve EV202, accidental shutdown solenoid valve EV201, accidental shutdown control pilot operated directional control valve HV201; integrated valve group has a hydraulic fluid port externally connecting, for connecting the pressure oil signal from pure mechanical hydraulic overspeed protection device PD201.
The applicable high-pressure system own vol of the utility model is little, can save middle pressure air compensating system, therefore greatly reduces the input of power station equipment and workshop building aspect, saves space, convenient layout.
When adopting the speed control system of this kind of structure, 10～16MPa the pressure generally using in middle-and-high voltage system in the industry take current line is as example, relatively conventional 6.3MPa system, speed control system self structure size will be decreased to original 1/2 to 1/3, and the air compensating system size of saving is also equivalent to an original speed control system equipment, and the space of saving and cost are apparent.
In recent years, increasing home and abroad station is selected the mesohigh speed control system of 10～16MPa, because along with the progress of hydraulics, pressure is no longer high like this, safety and the leakage problem that originally in high-pressure system, may exist are all effectively solved; Simultaneity factor pressure raises that institute brings that speed control system equipment own vol reduces, servomotor and pipeline size reduce, arrange the advantages such as easy, structure is attractive in appearance, and improves after system pressure and adopt nitrogen bottle tonifying Qi can save middle pressure air compensating system, greatly reduce costs and save the superiority such as factory building space and recognized by increasing Professional visitors.Therefore can predict, the application of high oil pressure speed control system will be more general in the near future.
Accompanying drawing explanation
Fig. 1 is hydraulic system structure schematic diagram of the present utility model;
Fig. 2 is mechanical assembly structure schematic diagram of the present utility model;
Fig. 3 is the mechanical structure exploded perspective view in guide vane control valve group and accidental shutdown loop in Fig. 2;
Fig. 4 is wheel blade control valve group mechanical structure exploded perspective view in Fig. 2;
Fig. 5 is urgent/accidental shutdown hydraulic control group mechanical structure exploded perspective view in Fig. 2;
Fig. 6 is stator emergency shutdown hydraulic control unit cartridge valve layout schematic diagram in Fig. 3;
Fig. 7 is stator emergency shutdown hydraulic control unit valve piece oil channel structures schematic diagram in Fig. 3;
Fig. 8 is wheel blade emergency shutdown hydraulic control unit cartridge valve layout schematic diagram in Fig. 4;
Fig. 9 is wheel blade emergency shutdown hydraulic control unit valve piece oil channel structures schematic diagram in Fig. 4;
Figure 10 is the exemplary block diagram of existing speed control system scheme.
Number in the figure represents: 1-base plate, 2-guide vane control valve group, 3-wheel blade control valve group, 4-is urgent/accidental shutdown hydraulic control valve group, 5-engine off control oil pipe, 10-guide vane control valve piece, 11-pilot valve SV001, 12-main valve MV001, 13-stator emergency shutdown hydraulic control unit valve piece, 14-leading control one-way valve CV001, 15-leading control one-way valve CV004, 16-leading control one-way valve CV003, 17-leading control one-way valve CV002, 18-cartridge valve CV201, 19-cartridge valve CV202, 20-wheel blade control valve piece, 21-pilot valve SV101, 22-main valve MV101, 23-wheel blade emergency shutdown hydraulic control unit valve piece, 24-leading control one-way valve CV103, 25-leading control one-way valve CV102, 26-leading control one-way valve CV101, 30-is urgent/accidental shutdown hydraulic control valve piece, 31-accidental shutdown solenoid valve EV201, 32-emergency shutdown solenoid valve EV202, 33-accidental shutdown pilot operated directional control valve HV201.
Embodiment
As shown in Fig. 1～9; the utility model is the hydraulic pressure installation of a kind of water turbine governing and protective system; comprise the guide vane control valve group 2 and the wheel blade control valve group 3 that are connected with pressure oil-source P, guide vane control valve group 2 is connected respectively guide vane servomotor SM001 and wheel blade servomotor SM101 with wheel blade control valve group 3.The innovation of the hydraulic pressure installation of water turbine governing of the present utility model and protective system is: also comprise accidental shutdown loop and shut down control valve group.Accidental shutdown loop is connected between guide vane control valve group 2 and guide vane servomotor SM001.Shut down control valve group and comprise pure mechanical hydraulic overspeed protection device PD201 and urgent/accidental shutdown hydraulic control valve group 4.Pure mechanical hydraulic overspeed protection device PD201 is connected successively with urgent/accidental shutdown hydraulic control valve group 4, and the urgent/stopping signal output terminal of accidental shutdown hydraulic control valve group 4 is connected with the accidental shutdown signal input part in the shutdown control signal input end of guide vane control valve group 2, accidental shutdown loop and the shutdown control signal input end of wheel blade control valve group 3.
It should be noted that: the urgent/stopping signal of accidental shutdown hydraulic control valve group 4 is connected to the shutdown control signal input end of guide vane control valve group 2 and wheel blade control valve group 2, but only have the output terminal of urgent/accidental shutdown hydraulic control valve group 4 accidental shutdown signals to be connected with accidental shutdown loop.
In this embodiment; guide vane control valve group 2 is connected behind accidental shutdown loop, is connected with guide vane servomotor SM001 unlatching chamber; it is closed the chamber leak oil line that stimulates the menstrual flow and is linked into leak oil tank, and the unlatching of stator completes by hydraulic action, the weight gravity of closing by being connected with regulating ring of wicket gate.Wheel blade control valve group 3 has two hydraulic fluid ports to be connected with the switch cavity of wheel blade servomotor SM101, and the switching manipulation of wheel blade all completes by hydraulic action.
Guide vane control valve group 2
Guide vane control valve group 2 is hydraulic units of the automatic control of stator and engine off control; comprise leading type servo proportion and the stator emergency shutdown hydraulic control unit of pilot valve SV001 and the supporting formation of main valve MV001, stator emergency shutdown hydraulic control unit is to consist of 4 leading control one-way valve CV001～CV004 on the oil circuit control being arranged between pilot valve SV001 and main valve MV001.Its structure is shown in Fig. 3, Fig. 6, and asphalt principle is shown in Fig. 1, Fig. 7.
Leading control one-way valve CV001～CV004 is cartridge valve structure, is integrated in the middle of the hydraulic valve block that an inside comprises oil circuit.The attachment face up and down of valve piece meets GB/T 2514 and ISO 4401 standards, upper and lower surperficial hydraulic fluid port is connected respectively hydraulic fluid port docking with pilot valve SV001 and main valve MV001, stack is arranged between the pilot valve SV001 and main valve MV001 of guide vane control valve group 2 leading type servo proportions.
4 leading control one-way valves in guide vane control valve group 2 are respectively: be arranged on the leading control one-way valve CV003 of pilot valve SV001 oil-feed port front end, for block the fuel feeding of main valve MV001 to pilot valve SV001 in shutdown situation; Be arranged on pilot valve SV001 be connected to leading control one-way valve CV001 on main valve MV001 a side control chamber oil circuit control, for cut off a side control chamber pilot control oil of main valve MV001 in shutdown situation; Be arranged on by pilot valve SV001 and be connected to leading control one-way valve CV002 on main valve MV001 b side control chamber oil circuit control, for the b side control chamber that makes main valve MV001 in shutdown situation, connect oil return; Be arranged on the leading control one-way valve CV004 that promotes on oil circuit control that main valve MV001 spool closes, for a side control chamber to main valve MV001 in shutdown situation, pass into pressure oil and promote main valve MV001 spool and move to shutdown position.
During normal operation, leading control one-way valve CV001～CV004, under the effect of pilot control hydraulic pressure signal, makes pilot valve SV001 connect to the oil circuit of main valve MV001 control chamber; Pilot valve SV001 accepts the electrical control signal of speed regulator electricity cabinet and is converted into hydraulic pressure signal to act on main valve MV001, main valve MV001 amplifies the hydraulic pressure signal from pilot valve SV001 to output to guide vane servomotor SM001, controls guide vane servomotor and does servo motion.On guide vane servomotor and leading type servo proportion, there is electric signal to feed back to speed regulator electricity cabinet, thereby form the electrohydraulic servo system of closed loop.
Promptly/during accidental shutdown, leading control one-way valve CV001～CV004, under the effect of pilot control hydraulic pressure signal, controls that main valve MV001 spool is moving to be moved on to closing direction guide vane servomotor SM001 is closed; The wherein a side control chamber pilot control oil sources of CV001 for cutting off main valve MV001, CV002 connects oil return for the b side control chamber that makes main valve MV001, CV003 is for blocking the fuel feeding of pilot valve SV001, and CV004 moves to shutdown position for the spool that passes into pressure oil promotion main valve MV001 to a side control chamber of main valve MV001.
The existence of stator emergency shutdown hydraulic control unit makes the speed regulator of this leading type servo proportion the same with the speed regulator of conventional main valve structure; first class of protection function to unit while possessing system equipment fault, in emergency circumstances can accept external signal and complete emergency stop function.
Wheel blade control valve group 3
Wheel blade control valve group 3 is hydraulic units of the automatic control of wheel blade and engine off control; the leading type servo proportion of pilot valve SV101 and the supporting formation of main valve MV101 and wheel blade emergency shutdown hydraulic control unit, wheel blade emergency shutdown hydraulic control unit is to consist of 3 leading control one-way valves on the oil circuit control being arranged between pilot valve SV101 and main valve MV101.Its structure is shown in Fig. 4, Fig. 8, and asphalt principle is shown in Fig. 1, Fig. 9.
Leading control one-way valve CV101～CV103 is cartridge valve structure, is integrated in the middle of the valve piece that an inside comprises oil circuit.The attachment face up and down of valve piece meets GB/T 2514 and ISO 4401 standards, and upper and lower surperficial hydraulic fluid port is connected hydraulic fluid port with pilot valve SV101 and main valve MV101 respectively and directly docks, and stack is arranged between pilot valve SV101 and main valve MV101.
3 leading control one-way valves in wheel blade control valve group 3 are respectively: be arranged on the leading control one-way valve CV103 of pilot valve SV101 oil-feed port front end, for block the fuel feeding of main valve MV101 to pilot valve SV101 in shutdown situation; Be arranged on by pilot valve SV101 be connected to leading control one-way valve CV101 on main valve MV101 a side control chamber oil circuit control, for cut off a side control chamber pilot control oil of main valve MV001 in shutdown situation; Be arranged on by pilot valve SV101 be connected to leading control one-way valve CV102 on main valve MV101 b side control chamber oil circuit control, for cut off the b side control chamber pilot control oil of MV101 in shutdown situation.
During normal operation, leading control one-way valve CV101～CV103, under the effect of pilot control hydraulic pressure signal, makes pilot valve SV101 connect to the oil circuit of main valve MV103 control chamber; Pilot valve SV101 accepts the electrical control signal of speed regulator electricity cabinet and is converted into hydraulic pressure signal to act on main valve MV101, main valve MV101 amplifies the hydraulic pressure signal from pilot valve SV101 to output to wheel blade servomotor SM101, controls wheel blade servomotor and does servo motion.On wheel blade servomotor and leading type servo proportion, there is electric signal to feed back to speed regulator electricity cabinet, thereby form the electrohydraulic servo system of closed loop.Promptly/and during accidental shutdown, leading control one-way valve CV101～CV103 is under the effect of pilot control hydraulic pressure signal, and it is motionless that the spool centering of controlling main valve MV101 makes wheel blade remain on current location; Wherein CV101 and CV102 connect oil return for a, the b both sides control chamber that make main valve MV101, CV103 is for blocking the fuel feeding of wheel blade control valve group 3 guide proportional valves, main valve MV101 is centering under the spring-force driven dual of both sides, and sealing servomotor open and close chamber hydraulic fluid port, keeps wheel blade position motionless.
When the setting of wheel blade emergency shutdown hydraulic control unit can effectively prevent speed control system fault, wheel blade may occur that fluctuation brings harm to unit, reduce simultaneously urgent/speed control system uses oil mass during accidental shutdown.
Accidental shutdown loop
The second class protection of accidental shutdown loop during as unit operation, is equivalent to the emergency distributing valve part of conventional speed control system, makes unit operation more safe and reliable.Accidental shutdown loop is comprised of two cartridge valve CV201 and CV202 and each oil circuit of being connected to cartridge valve, and cartridge valve CV201 and CV202 are integrated on a hydraulic valve block.Wherein: cartridge valve CV201 is connected between guide vane control valve group 2 and guide vane servomotor SM001, the output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group 4; Cartridge valve CV202 is connected in parallel between the input end and cartridge valve CV201 output terminal of guide vane servomotor SM001, and the output terminal of cartridge valve CV202 is connected to oil return, another output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group 4.The structure in accidental shutdown loop is shown in Fig. 3, and principle is shown in Fig. 1.
When pure mechanical hydraulic overspeed protection device PD201 or accidental shutdown solenoid valve EV201 action make pilot operated directional control valve HV201 control loop decompression, the commutation of pilot operated directional control valve HV201 spool changes cartridge valve CV201 and CV202 control loop pressure signal state.Cartridge valve CV201 blocks the automatic control hydraulic oil from guide vane control valve group 2; Cartridge valve CV202 controls guide vane servomotor SM001 and opens chamber and connect oil return, makes that guide vane servomotor SM001 closes under weight effect, compressor emergency shutdown.
Promptly/accidental shutdown hydraulic control valve group 4
Promptly/accidental shutdown control valve group is to accept the outside hydraulic control signal of introducing; can accept the electrical signal of outside input simultaneously, and hydraulic control signal logic be changed into required hydraulic pressure signal and be transported to the hydraulic control unit in guide vane control valve group 2, wheel blade control valve group 3 and accidental shutdown loop.Promptly/accidental shutdown hydraulic control valve group 4 comprises accidental shutdown solenoid valve EV201, accidental shutdown control pilot operated directional control valve HV201 and emergency shutdown solenoid valve EV202.Concrete: pure mechanical hydraulic overspeed protection device PD201 end connects accidental shutdown solenoid valve EV201; the control chamber of accidental shutdown solenoid valve EV201 end emergency shutdown solenoid valve EV202 in parallel and accidental shutdown control pilot operated directional control valve HV201; the output terminal of emergency shutdown solenoid valve EV202 connects guide vane control valve group 2 and wheel blade control valve group 3, and the output terminal of accidental shutdown control pilot operated directional control valve HV201 connects accidental shutdown loop.The structure of promptly/accidental shutdown hydraulic control valve group is shown in Fig. 5, and principle is shown in Fig. 1.
Accidental shutdown solenoid valve EV201, accidental shutdown control pilot operated directional control valve HV201 and emergency shutdown solenoid valve EV202 are integrated on a hydraulic valve block; the front end of this hydraulic valve block is provided with a hydraulic fluid port externally connecting, for connecting the pressure oil signal from pure mechanical hydraulic overspeed protection device PD201.In case of emergency, can send emergency shutdown hydraulic control signal by emergency shutdown solenoid valve EV202 and make compressor emergency shutdown; Under accident conditions, can send accidental shutdown hydraulic control signal by accidental shutdown solenoid valve EV201 and make compressor emergency shutdown; When under unit electrical control signal failure conditions; when unit forwards the setting speed that reaches pure mechanical hydraulic overspeed protection device PD201 to; the hydraulic pressure signal sending by pure mechanical hydraulic overspeed protection device PD201 also can be realized compressor emergency shutdown, thereby realizes the multiple protective to unit.
Promptly/and during accidental shutdown, this urgent/accidental shutdown hydraulic control valve group 4 is transported to respectively guide vane control valve group 2 and wheel blade control valve group 3 by the hydraulic pressure signal after conversion, controls stator and closes, and it is motionless that wheel blade remains on current location; During accidental shutdown; from accidental shutdown solenoid valve EV201 or pure machinery, also want the hydraulic pressure signal of overspeed protection device PD201; through pilot operated directional control valve HV201, switch the control chamber that is transported to accidental shutdown cartridge valve CV201 and CV202; control CV201 and block the hydraulic oil from automatic control loop; CV202 makes guide vane servomotor SM001 open chamber and connects oil return, makes unit guide vane servomotor SM001 close and make compressor emergency shutdown under weight effect.
In this embodiment, guide vane servomotor SM001 is that weight cuts out, its guide vane control valve group 2 can be used for the servomotor of bidirectional hydraulic operation completely, only the A of the main valve MV001 of leading type servo proportion, B mouth need to be drawn to the switch cavity that is connected to respectively guide vane servomotor SM001 simultaneously; In addition by guide vane control valve group 2 for wheel blade control, also applicable to urgent/wheel blade need be closed during accidental shutdown unit.
Pilot-operated type control valve of the present utility model adopts leading type servo proportion, but is not limited to this, and this pilot-actuated valve can also be selected leading type servo electromagnetic valve, pilot proportional directional control valve, leading type high frequency sound valve etc.
Core of the present utility model is between the pilot valve of stator/wheel blade pilot-operated type control valve and main valve, to have superposeed to shut down for stator/wheel blade the hydraulic unit of controlling; this unit is integrated on a hydraulic valve block and is formed by multiple leading control one-way valves; the attachment face up and down of valve piece meets GB/T 2514 and ISO 4401 standards; upper and lower surperficial hydraulic fluid port is connected hydraulic fluid port with pilot valve and main valve respectively and directly docks, and stack is arranged between pilot valve and main valve.Promptly/during accidental shutdown, control stator valve core of main valve and shift to a side guide vane servomotor is closed, control wheel main leaf valve spool centering sealing wheel blade servomotor switch cavity hydraulic fluid port and to make wheel blade remain on current location motionless.Therefore no matter how concrete element is replaced, how variation, mounting point to change, and all belongs to protection domain of the present utility model.
Claims (8)
1. a hydraulic pressure installation for water turbine governing and protective system, comprises the guide vane control valve group and the wheel blade control valve group that are connected with pressure oil-source, and guide vane control valve group is connected respectively guide vane servomotor and wheel blade servomotor with wheel blade control valve group; It is characterized in that: described hydraulic pressure installation also comprises pure mechanical hydraulic overspeed protection device, accidental shutdown loop and urgent/accidental shutdown control valve group; accidental shutdown loop is connected between guide vane control valve group and guide vane servomotor; pure mechanical hydraulic overspeed protection device is connected successively with urgent/accidental shutdown hydraulic control valve group, and the urgent/stopping signal output terminal of accidental shutdown hydraulic control valve group is connected with the accidental shutdown signal input part in the shutdown control signal input end of guide vane control valve group, accidental shutdown loop and the shutdown control signal input end of wheel blade control valve group.
2. the hydraulic pressure installation of water turbine governing and protective system according to claim 1, it is characterized in that: described urgent/accidental shutdown hydraulic control valve group comprises accidental shutdown solenoid valve, accidental shutdown control pilot operated directional control valve and emergency shutdown solenoid valve, pure mechanical hydraulic overspeed protection device end connects accidental shutdown solenoid valve, the control chamber of accidental shutdown solenoid valve end emergency shutdown solenoid valve in parallel and accidental shutdown control pilot operated directional control valve, the output terminal of emergency shutdown solenoid valve connects guide vane control valve group and wheel blade control valve group, the output terminal of accidental shutdown control pilot operated directional control valve connects accidental shutdown loop.
3. the hydraulic pressure installation of water turbine governing and protective system according to claim 2, is characterized in that: described accidental shutdown solenoid valve, accidental shutdown control pilot operated directional control valve and emergency shutdown solenoid valve are integrated on a hydraulic valve block.
4. the hydraulic pressure installation of water turbine governing and protective system according to claim 1, it is characterized in that: described accidental shutdown loop is integrated on a hydraulic valve block and is formed by two cartridge valves, one of them cartridge valve is connected between guide vane control valve group and guide vane servomotor, the output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group; Another cartridge valve is connected in parallel between the input end and the above-mentioned cartridge valve output terminal being connected in series of guide vane servomotor, and the output terminal of this cartridge valve is connected to oil return, another output terminal of be connected to promptly/accidental shutdown control valve of its control signal input end group.
5. the hydraulic pressure installation of water turbine governing and protective system according to claim 1; it is characterized in that: described stator/wheel blade control valve group comprises: the leading type servo proportion of pilot valve and the supporting formation of main valve and stator/wheel blade emergency shutdown hydraulic control unit, stator/wheel blade emergency shutdown hydraulic control unit is that several are arranged on the leading control one-way valve on oil circuit control between pilot valve and main valve.
6. the hydraulic pressure installation of water turbine governing and protective system according to claim 5; it is characterized in that: in described stator emergency shutdown hydraulic control unit, there are 4 leading control one-way valves, be separately positioned on: by pilot valve, be connected on two oil circuit controls of main valve control chamber, by main valve on pilot valve oil feeding line and promote on oil circuit control that valve core of main valve closes.
7. the hydraulic pressure installation of water turbine governing and protective system according to claim 5; it is characterized in that: in described wheel blade emergency shutdown hydraulic control unit, there are 3 leading control one-way valves, be separately positioned on: by pilot valve, be connected on two oil circuit controls of main valve control chamber and by main valve on first valve oil feeding line.
8. the hydraulic pressure installation of water turbine governing and protective system according to claim 5, is characterized in that: the leading control one-way valve of described stator/wheel blade emergency shutdown hydraulic control unit is integrated on a hydraulic valve block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320583410.4U CN203548054U (en) | 2013-09-22 | 2013-09-22 | Hydraulic device for water turbine speed control and protection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320583410.4U CN203548054U (en) | 2013-09-22 | 2013-09-22 | Hydraulic device for water turbine speed control and protection system |
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| CN201320583410.4U Withdrawn - After Issue CN203548054U (en) | 2013-09-22 | 2013-09-22 | Hydraulic device for water turbine speed control and protection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470441A (en) * | 2013-09-22 | 2013-12-25 | 东方电机控制设备有限公司 | Hydraulic device of water turbine speed governing and protection system |
| CN111336151A (en) * | 2020-04-01 | 2020-06-26 | 东方电气自动控制工程有限公司 | Control method of hydraulic speed regulation system with manual automatic switching function |
| CN113431733A (en) * | 2021-06-06 | 2021-09-24 | 中国长江电力股份有限公司 | Emergency air-supplementing and oil-supplementing system for pressure vessel of hydraulic system of hydraulic turbine speed regulator |
-
2013
- 2013-09-22 CN CN201320583410.4U patent/CN203548054U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470441A (en) * | 2013-09-22 | 2013-12-25 | 东方电机控制设备有限公司 | Hydraulic device of water turbine speed governing and protection system |
| CN103470441B (en) * | 2013-09-22 | 2015-12-30 | 东方电机控制设备有限公司 | The hydraulic pressure installation of a kind of water turbine governing and protective system |
| CN111336151A (en) * | 2020-04-01 | 2020-06-26 | 东方电气自动控制工程有限公司 | Control method of hydraulic speed regulation system with manual automatic switching function |
| CN111336151B (en) * | 2020-04-01 | 2021-08-13 | 东方电气自动控制工程有限公司 | Control method of hydraulic speed regulation system with manual automatic switching function |
| CN113431733A (en) * | 2021-06-06 | 2021-09-24 | 中国长江电力股份有限公司 | Emergency air-supplementing and oil-supplementing system for pressure vessel of hydraulic system of hydraulic turbine speed regulator |
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