CN2252246Y - Electrohydraulic ration follow-up device for water turbine governor - Google Patents
Electrohydraulic ration follow-up device for water turbine governor Download PDFInfo
- Publication number
- CN2252246Y CN2252246Y CN95238033U CN95238033U CN2252246Y CN 2252246 Y CN2252246 Y CN 2252246Y CN 95238033 U CN95238033 U CN 95238033U CN 95238033 U CN95238033 U CN 95238033U CN 2252246 Y CN2252246 Y CN 2252246Y
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- oil
- hydraulic cylinder
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- pressure
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses an electro-hydraulic proportion follow-up device for water turbine speed regulators. Three paralleled oil paths are composed of an electro-hydraulic proportion direction valve and a manual switching electromagnetic valve which are communicated with a high pressure oil source, an emergency stop electromagnetic valve, and a manually operated valve, and then the three paralleled oil paths are crossed at an A and a B points which are respectively connected with a one-way throttle valve in series to be connected to the oil holes C and D of a hydraulic cylinder to form three independent control circuits. The utility model is also provided with an electrical feedback device and an interface amplifier to form a closed-loop control part with the electro-hydraulic proportion direction valve. Besides, the utility model is provided with two sections of closing device. The utility model is matched with electric control parts to form electro-hydraulic speed regulators for medium and small-sized water turbines.
Description
The utility model relates to a kind of high oil-pressure electrohydraulic proportional servo device of middle-size and small-size water turbine electrohydraulic governor.
At present, most of middle-size and small-size hydrogovernors still adopt the mechanical-hydraulic type speed regulator that designed in the past over half a century both at home and abroad, have only sub-fraction to adopt the electric hydraulic type speed regulator of exploitation in recent years.This class electric hydraulic type speed regulator generally is made of all kinds of electric control systems and electro-hydraulic servo device.
Existing electro-hydraulic servo device, its operating oil pressure is between 2～4 MPas.Working oil is forced down, and volume is big, and used hydraulic parts is off-gauge dedicated hydraulic spare and heavy, connect with many mechanical rod members and oil pipe line each other, complex structure, adjust difficult, cost of production is high, standardization level is low.In addition, the pressurized air in its pressure oil tank is soluble in the pressure oil and is taken out of or leak by pressure oil, and a few hours will be replenished pressurized air to pressure oil tank to tens of hours, need making-up air devices such as configuration compressor, gas tank.
The purpose of this utility model provides a kind of simple in structure, standardization level is higher, replacing pressure oil with bladder type hydropneumatic accumulator irritates, and adopt high pressure gear oil pump to make its operating oil pressure up to 10～20 MPas, the output function merit reaches as high as 50000 Ns, the electric-hydraulic proportion followup device of the hydrogovernor of rice.
Fig. 1 is the utility model structured flowchart.
Fig. 2 is a fundamental diagram.
Fig. 3 is the structure installation diagram of the seal arrangement among Fig. 2.
Below in conjunction with accompanying drawing the utility model embodiment is described further.
In Fig. 1, the high pressure fuel source that connects oil sump tank is connected electrohydraulic proportional directional valve and manual switchover solenoid valve; The accidental shutdown solenoid valve; Meet at A, B 2 points behind three oil circuits in parallel that manual operating valve constitutes, the one-way throttle valve of respectively going here and there again afterwards is connected to the oilhole C and the D of oil hydraulic cylinder, has constituted separately independently electric-hydraulic proportion control, manually three loops of control and accidental shutdown control.Also two sections cut-off valves and electrical feedback device are housed at the oil hydraulic cylinder tail end.On the oil circuit that oil extraction side B point when two sections cut-off valves are serially connected with the oil hydraulic cylinder shutdown is ordered to D; The feedback signal Va line of electrical feedback device be connected to the interface amplifier respectively from the control signal Vy line of electric control system, the actuating coil of electrohydraulic proportional directional valve both sides is received in the output of its amplifier, thereby constitutes the electric-hydraulic proportion followup device of a closed loop control with above-mentioned electric-hydraulic proportion control loop.
In Fig. 2, high pressure fuel source is made up of oil sump tank 1, safety net 2, motor 3, high-pressure gear pump 4, oil purifier 5, one-way valve 6, bladder type hydropneumatic accumulator 7.Its effect is to provide pressure stable oil to the utility model, and pressure is maintained in the setting range.During proper functioning, fill in the capsule of accumulator, to guarantee after reaching working pressure 10～20 MPas, the compressed nitrogen of about 1/2nd volumes being arranged in the accumulator with an amount of compressed nitrogen.When operating oil pressure drops to setting valve, electric motor starting, gear pump by oil purifier and one-way valve, is transported to accumulator with the hydraulic oil in the oil sump tank, rises to setting valve up to its pressure, and motor stops.
Hydraulic pressure cylinder assembly waves oil hydraulic cylinder 13, bearing support 14, seal arrangement 15 by the head axial pin type of routine and constitutes.Bearing support is fixed on the oil sump tank, and the head pivot pin of its inner earrings and oil hydraulic cylinder links.
Above-mentioned seal arrangement sees that Fig. 3 is between the piston rod and bearing support 14 of oil hydraulic cylinder front end, by shielding can 15a, and big pressure ring 15b, shelves scraper ring 15c, little pressure ring 15d constitutes.Shielding can is installed on the front cover of oil hydraulic cylinder, and big or small pressure ring is fitted in the shelves scraper ring respectively on bearing support and the shielding can, in case non-return fuel tank inner fluid leaks outside, prevents that simultaneously metal particle and dust etc. from entering oil sump tank and polluting oil.The shelves scraper ring is made with oil resistant rubber, when oil hydraulic cylinder waves, can guarantee good sealing property.
Two sections shutoff devices among Fig. 2 are made of the one-way throttle valve two section cut-off valves 18 in parallel with the stroke valve adjustable collision block 17 and one; These two sections cut-off valves are serially connected with on the oil hydraulic cylinder oil extraction side oil circuit in when shutdown, promptly on the oil circuit that the B point is ordered to D, and are contained on the afterbody end cap of oil hydraulic cylinder, and it acts on mutually with adjustable collision block on the back piston bar tail end that is contained in oil hydraulic cylinder.When oil hydraulic cylinder closes when adjusting the position, two sections cut-off valves of adjustable collision block collision make two sections to cut out input, slow down the closing velocity of oil hydraulic cylinder, realize two sections and close.Closing velocity is by two sections cut-off valve adjustment, two sections determining positions of closing the position of input by adjustable collision block.
When the utility model is in electric-hydraulic proportion control, regulated signal Vy and feedback signal V α from electric control system compare and enlarge through the interface amplifier, its output signal promotes electrohydraulic proportional directional valve, make unit to the unlatching of oil hydraulic cylinder or close side and join oil, making oil hydraulic cylinder to opening or the closing direction motion, is zero until the difference of feedback signal and output signal.Because feedback signal and oil hydraulic cylinder displacement are linear, thereby realized regulated signal is converted to linearly the aperture of oil hydraulic cylinder.
When manual control, at first move hand automatic switchover solenoid valve, promptly cut off the oil circuit of electrohydraulic proportional directional valve to oil hydraulic cylinder, available manual operating valve carries out the switching on and shutting down operation to oil hydraulic cylinder then.
Under the electric-hydraulic proportion control work condition; when needing accidental shutdown; accidental shutdown solenoid valve and hand automatic switchover solenoid valve move simultaneously; the former directly joins oil to oil hydraulic cylinder pass pusher side; make its quick complete shut-down; the latter cuts off the oil circuit of electrohydraulic proportional directional valve to oil hydraulic cylinder, even guaranteeing when electro-hydraulic proportional valve is stuck in the start side, and also reliable quick shutdown.Manually under the control work condition during accidental shutdown, only the action of accidental shutdown solenoid valve gets final product.
Electrohydraulic proportional directional valve of the present utility model and hand automatic switchover solenoid valve connect with a little hydraulic manifold block, and are fixedly connected jointly on a big hydraulic manifold block with accidental shutdown solenoid valve and manual operating valve, are installed on the oil sump tank.Miscellaneous part such as oil hydraulic cylinder, bearing support and high pressure fuel source etc. all are assemblied on the oil sump tank, constitute the device of an independent completion.
Claims (5)
1, a kind of electric-hydraulic proportion followup device of hydrogovernor mainly is made up of oil sump tank, motor, high pressure oil pump, accumulator, hydraulic valve piece, hydraulic manifold block, oil hydraulic cylinder, displacement transducer and interface amplifier, it is characterized in that:
A, a high pressure fuel source link with three control loops in parallel by the pressure oil circuit, and three oil circuits are respectively by electrohydraulic proportional directional valve (9) and hand automatic switchover solenoid valve (8); Accidental shutdown solenoid valve (10); And manual operating valve (11) constitutes; After three oil circuits are parallel to A, B at 2, after the A point, be connected in series an one-way throttle valve (12A) again on the oil circuit, after the B point, be connected in series an one-way throttle valve (12B) on the oil circuit, both are connected to two oilhole C and D of the oil hydraulic cylinder (13) of hydraulic pressure cylinder assembly, thereby have constituted separately independently electric-hydraulic proportion control, manually control and three loops of accidental shutdown control; Oil return is in return tube flows into oil sump tank (1);
B, two sections shutoff devices (18) and electrical feedback device (16) are housed on above-mentioned hydraulic pressure cylinder assembly, the feedback signal V α of electrical feedback device is connected to the input end of interface amplifier (19) with lead, the output signal of this amplifier is connected to the actuating coil of electrohydraulic proportional directional valve (9) both sides with lead, constitutes the electric-hydraulic proportion followup device of a closed loop control with above-mentioned electric-hydraulic proportion control loop.
2, followup device as claimed in claim 1, it is characterized in that described high pressure fuel source has adopted high-pressure gear pump (4) and high pressure bladder type hydropneumatic accumulator (7), the capsule of bladder type hydropneumatic accumulator fills with high pressure nitrogen, and capsule separates pressure oil and nitrogen, and its operating oil pressure is 10～20 MPas.
3, followup device as claimed in claim 1, it is characterized in that described hydraulic pressure cylinder assembly waves oil hydraulic cylinder (13), bearing support (14) and seal arrangement (15) by the head axial pin type and constitutes, sealing device (15) is positioned between the front end piston rod and bearing support (14) of oil hydraulic cylinder (13), constitute by shielding can (15a), big pressure ring (15b), oil deflector (15c), little pressure ring (15d), shielding can (15a) is installed on the front cover of oil hydraulic cylinder (13), and big or small pressure ring (15b, 15d) is fitted in oil deflector (15c) respectively on bearing support (14) and the shielding can (15a).
4, followup device as claimed in claim 1, it is characterized in that described two sections shutoff devices are made of the one-way throttle valve two section cut-off valves (18) in parallel with the stroke valve adjustable collision block (17) and one, on oil extraction side oil circuit when these two sections cut-off valves (18) are serially connected with the oil hydraulic cylinder shutdown, on the oil circuit that to be the B point order to D, and be contained on the end cap of oil hydraulic cylinder, it acts on mutually with adjustable collision block on the piston rod end that is contained in oil hydraulic cylinder.
5, followup device as claimed in claim 1 is characterized in that described electrical feedback device (16) is installed on the piston rod end of the end cap of oil hydraulic cylinder (13) and oil hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95238033U CN2252246Y (en) | 1995-11-14 | 1995-11-14 | Electrohydraulic ration follow-up device for water turbine governor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95238033U CN2252246Y (en) | 1995-11-14 | 1995-11-14 | Electrohydraulic ration follow-up device for water turbine governor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2252246Y true CN2252246Y (en) | 1997-04-16 |
Family
ID=33880576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95238033U Expired - Fee Related CN2252246Y (en) | 1995-11-14 | 1995-11-14 | Electrohydraulic ration follow-up device for water turbine governor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2252246Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116629C (en) * | 1998-05-18 | 2003-07-30 | 武汉三联水电控制设备公司 | Full-digital microcomputer-controlled water turbine speed regulator |
| CN100383407C (en) * | 2004-12-31 | 2008-04-23 | 杭州和利时自动化有限公司 | Self-capacitance electrohydraulic actuator and integrated oil path block |
| CN102954066A (en) * | 2012-11-19 | 2013-03-06 | 无锡九条龙汽车设备有限公司 | Connecting method for speed changing loop adopting motion valve of hydraulic system |
| CN109209752A (en) * | 2018-10-26 | 2019-01-15 | 大唐甘肃发电有限公司碧口水力发电厂 | Based on hydraulic turbine water flow speed regulating control equipment and control method |
-
1995
- 1995-11-14 CN CN95238033U patent/CN2252246Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1116629C (en) * | 1998-05-18 | 2003-07-30 | 武汉三联水电控制设备公司 | Full-digital microcomputer-controlled water turbine speed regulator |
| CN100383407C (en) * | 2004-12-31 | 2008-04-23 | 杭州和利时自动化有限公司 | Self-capacitance electrohydraulic actuator and integrated oil path block |
| CN102954066A (en) * | 2012-11-19 | 2013-03-06 | 无锡九条龙汽车设备有限公司 | Connecting method for speed changing loop adopting motion valve of hydraulic system |
| CN109209752A (en) * | 2018-10-26 | 2019-01-15 | 大唐甘肃发电有限公司碧口水力发电厂 | Based on hydraulic turbine water flow speed regulating control equipment and control method |
| CN109209752B (en) * | 2018-10-26 | 2020-07-31 | 大唐甘肃发电有限公司碧口水力发电厂 | Water flow speed regulation control equipment and control method based on water turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |