CN1177134C - Electric/mechanic operating mechanism of hydraulic turbine blades - Google Patents
Electric/mechanic operating mechanism of hydraulic turbine bladesInfo
- Publication number
- CN1177134C CN1177134C CNB031184529A CN03118452A CN1177134C CN 1177134 C CN1177134 C CN 1177134C CN B031184529 A CNB031184529 A CN B031184529A CN 03118452 A CN03118452 A CN 03118452A CN 1177134 C CN1177134 C CN 1177134C
- Authority
- CN
- China
- Prior art keywords
- operation mechanism
- servo motor
- electricity
- actuating motor
- water turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
Abstract
The present invention provides an electric/mechanical operation mechanism for a propeller blade of a hydraulic turbine. The electric/mechanical operation mechanism is adopted to substitute for an oil cylinder system to adjust an opening degree of the propeller blade of a hydraulic turbine. A servo motor and an output shaft of a speed reducer are connected with a trapezoid screw arranged in a main shaft of a turbine set. The upper section of a trapezoid nut sleeve is connected with the trapezoid screw by a thread, and the lower end of the trapezoid nut sleeve is connected with an operation shaft. The operation shaft is directly connected with a propeller blade operation mechanism in a rotary wheel body of the hydraulic turbine. The servo motor and the speed reducer are fixed at the upper end of the main shaft of the turbine set by brackets, and are connected with the main shaft of the turbine set by two-way thrust bearings. A DC servo motor and a harmonic speed reducer are perfectly adopted. A feedback device for reflecting the change of a rotary angle of the propeller blade is arranged near the trapezoid nut sleeve. A feedback signal and a control circuit of the servo motor are connected, and closed loop control is formed. The control circuit of the servo motor and a power supply are connected with the servo motor by collecting rings. The phenomenon of oil leakage is thoroughly eradicated by the mechanism. An integral structure of a speed regulator of the hydraulic turbine is simplified, a hub ratio is reduced, and the flow rate and the output force of the turbine set are increased.
Description
Technical field
The present invention relates to a kind of electricity-machine operation mechanism of water turbine blade, the aperture that is used for the Kaplan turbine blade is regulated.
Background technique
The blade of Kaplan turbine is regulated, normally will cause the lubricant receiver of vertical rotary propeller type hydraulic generator unit upper end from the pressure oil of speed regulator operating oil line, enter blade servomotor (operating cyloinder) in the Hydraulic Turbine Rotor of lower end through inside and outside oil pipe along the hollow spindle of unit, again by operating cyloinder drive operating device in the web make all blades simultaneously forward and backwards to regulate flow.
It is very easily to produce wearing and tearing that the root pivot of blade and its lining bear under huge water pressure and the continuous situation of rotating at blade for a long time, behind the abrasion deformation, other sealing materials all can't stop the pressure oil in the web to pour in the draft tube, usually seriously pollute downstream river course, harm downstream people's health.If can fundamentally solve this leakage of oil problem, then significant to China's rivers environmental protection.
More or less all there is blade leakage of oil problem in numerous power stations with rotary propeller type (or tubular) unit.Ton surplus for example the leakage of oil in a year of the distant water in field in Hunan Province power station reaches 80.So the power station that has is said tastily: " we generate electricity with oil.”
In addition, the conventional equipment of this home and abroad, complex structure not only, particularly be subjected to structural limitations (inside and outside oil pipe on the one hand will be with main axis rotation, also will with the upper and lower action of blade servomotor), make very difficulty of lubricant receiver and inside and outside tubing interface place sealing, usually be that leakage of oil, string oil are serious, cause in the oil gear of speed regulator pump start frequent, not only the oil pump serious wear also constantly expends station service.
Summary of the invention
The objective of the invention is to design a kind of electricity-machine operation mechanism of water turbine blade, thoroughly eradicate this general oil leakage phenomenon, simplify the hydrogovernor overall structure, reduce hub ratio, increase the unit flow and exert oneself.
Technological scheme of the present invention is: operating device comprises servo-system and driving mechanism, the aperture that the present invention adopts a kind of electricity-machine operation mechanism to replace cylinder system to regulate the water turbine blade.Servo-system adopts actuating motor, speed reducer and control circuit thereof, driving mechanism adopts the bolt and nut nested structure, the output shaft of actuating motor and the speed reducer trapezoidal screw interior with placing set main shaft is connected, trapezoidal nut cover epimere is threaded with trapezoidal screw, lower end attended operation axle, service axis directly connect the blade operating mechanism in the Hydraulic Turbine Rotor.
The electricity of described water turbine blade-machine operation mechanism, actuating motor and speed reducer are fixed on the upper end of set main shaft by support, are connected with set main shaft by doubledirection thrust bearing.
The electricity of described water turbine blade-machine operation mechanism, actuating motor adopts DC servo motor, and speed reducer adopts harmonic speed changer.
The electricity of described water turbine blade-machine operation mechanism is equipped with the electrical feedback device that direct reflection blade corner changes near the trapezoidal nut cover, the control circuit of electrical feedback device and actuating motor is connected, and forms closed loop control.
The electricity of described water turbine blade-machine operation mechanism, its actuating motor control circuit and power supply are connected with actuating motor by collector ring.
Advantage of the present invention is:
1. fundamentally solved leakage of oil, swap oil problem, and because the serious environmental pollution problem that leakage of oil brings.
2. owing to cancelled the interior servomotor of web, can reduce hub ratio, increase the unit flow and exert oneself remarkable in economical benefits.
3. also can simplify conventional dual regulation hydrogovernor greatly.For example can cancel main control valve that blade in the dual regulation hydrogovernor adjusts and corresponding connection pipeline thereof and to the pipeline of lubricant receiver etc.Realize dull water saving turbine speed regulator and dual regulation hydrogovernor profile and connect the size basically identical.The electric joint function that the latter only increases the electrical control function of blade electricity-machine and stator, paddle and relevant table meter etc.
Description of drawings
Fig. 1 is a structural representation of the present invention, and each sequence number is represented respectively among the figure: 1-service axis, 2-coupling (adjustable), 3-set main shaft, 4-trapezoidal nut cover, 5-trapezoidal screw, 6-feedback collector ring, 7-doubledirection thrust bearing, 8-support, 9-harmonic speed changer, 10-DC servo motor, 11-collector ring, the electric feedback of 12-magnetic, 13-feather key, 14-long and narrow hole, 15-adjust with hole, 16-driven by servomotor power supply, 17-control circuit, 18-command signal, 19-feedback signal.
Embodiment
As accompanying drawing 1: the aperture (corner) that the present invention adopts an a kind of electric machine operation mechanism to replace cylinder system to regulate the water turbine blade.Device all is installed on the set main shaft 3, and rotates with main shaft.Its servo-system adopts DC servo motor 10 and harmonic speed changer 9 and driving power 16 and control circuit 17, and 16 of actuating motor control circuit 17 and power supplys pass through collector ring 11 and be connected with actuating motor.Driving mechanism adopts the bolt and nut nested structure, place in the set main shaft, DC servo motor and harmonic wave reduction unit output shaft drive trapezoidal screw 5 forward and backwards, trapezoidal nut overlaps 4 epimeres and is threaded with trapezoidal screw, the lower end is by coupling 2 attended operation axles 1, and service axis directly connects the blade operating mechanism in the Hydraulic Turbine Rotor.
DC servo motor and harmonic speed changer are fixed on the upper end of set main shaft by support 8, are connected with set main shaft 3 by doubledirection thrust bearing 7.
Put electrical feedback device 12, the collector ring 6 that direct reflection blade corner variation is housed at trapezoidal nut, the control circuit 17 of feedback signal 19 and DC servo motor is connected, the compare output of controlling and driving power supply 16 of feedback signal 19 and instruction signals 18 forms closed loop control.Long and narrow hole 14 is the installations that make things convenient for feedback means, the 15th, and the hole is used in the adjustment when trapezoidal nut overlaps 4 lower ends and is connected with service axis 1 by coupling 2.
Working principle and process: after the harmonic wave drive speed reducer 9 increase output torques of high speed DC servo motor 10 by big speed ratio, drive trapezoidal screw 5 forward and backwards, trapezoidal nut cover 4 restricts in feather key 13 and moves up and down, together with service axis 1 with greater than the upper and lower action of the power of 50-100 ton, operating device in the operation water wheels body, make the positive and negative rotation simultaneously of all blades, regulate flow.Service axis 1 is arranged in the center portion of hydraulic generator unit hollow spindle, to replace former inside and outside oil pipe.The standard-sized sheet of blade, complete shut-down time can be adjusted by the driving power of DC servo motor.
The electricity of this water turbine blade-machine operation mechanism can realize the nothing oil blade adjusting of kaplan type turbine.Test on rotary wheel of water turbine diameter D=3.3M and following commentaries on classics slurry formula unit, doubledirection thrust bearing is selected GB/T301-1995 for use; 52000 types; D=120mm; Basic load rating Ca=670KN=67T.Harmonic speed changer adopts XB250 type, reduction speed ratio 125; 1500 rev/mins of input speeds; Output torque 3500N.m.DC servo motor is selected the little inertia wide range speed control of 6～7KW permanent magnetic DC actuating motor for use, and 1500 rev/mins of rated speeds are as 217SZKW-C-02.
This device changes on the slurry formula unit at rotary wheel of water turbine diameter D=4.5M to be tested, and the maximum steering force 227T of operating device selects the unilateral thrust selfaligning roller bearing for use, as GB/T5859-1994; 29000 types; D=240mm; Basic load rating
Ca=2740KN=274T; Select two to be combined into two-way use.Harmonic speed changer adopts XB300 type, reduction speed ratio 215; 1000 rev/mins of input speeds; Output torque 10000N.m.DC servo motor is selected the little inertia wide range speed control of 6～7KW permanent magnetic DC actuating motor for use, and 1000 rev/mins of rotating speeds are as 217SZKW-C-02.
Electrical feedback device 12 can have multiple mode, as uses displacement detector, displacement amount is converted to voltage as returning feedback signal again.This device is except that electrical feedback device 12 fixed installations, and all the other are installed on the set main shaft, and random group is rotated together.Also the sensor of electric feedback can be contained in the long and narrow hole 14, lead is guided on the collector ring 6 that is centered around on the main shaft.For the control circuit that mechanical quantity is converted to electric weight and actuating motor all are mature technologies, therefore no longer describe in detail.
This device adopts DC servo motor, slow down and the increase torque through harmonic driving, drive the trapezoidal screw forward and backward, trapezoidal nut (cover) is then together with the operating device in the upper and lower action of service axis (replacing inside and outside oil pipe) the direct control Hydraulic Turbine Rotor, make all blades forward and backward simultaneously, regulate flow.This mechanism also is provided with doubledirection thrust bearing 7, is installed on the set main shaft, and huge upper and lower steering force (tens～hundreds of T) is promptly cancelled out each other in set main shaft inside.Be applicable to large, medium and small various rotary propeller type or tubular unit in principle.Main shaft is used to link water turbine and generator, and it can bear the huge hydraulic thrust of blade and the huge thrust loading of generator thrust bearing, has enough strength and stiffness.Its application area depends on the specification of corollary equipment, as long as each corollary equipment can meet the demands, the embodiments of the invention scope is unrestricted.
This device rotates together in company with set main shaft, and electrical signal is then drawn by collector ring.Electric device 12 is housed near trapezoidal swivel nut, and collector ring 6 is centered around on the main shaft, can directly reflect the variation of blade corner.The control section of this displacement transducer and DC servo motor constitutes positional servosystem and forms closed loop control, it can adjust the blade corner by the command signal of microcomputer, realize digital joint, guarantee that unit operation is in efficient district, therefore control accuracy height, and these control functions all can be attached in the speed regulator and realize.So after adopting this device, just can cancel conventional conventional components such as lubricant receiver, inside and outside oil pipe and blade servomotor.
The present invention adopts the DC servo motor collector ring fairly simple, adopts AC servo motor can realize equally, is the collector ring more complicated, and other parts select for use principle identical, no longer enumerate.
Core of the present invention is that aperture and the operating device that electricity consumption-machine operation mechanism replaces cylinder system to regulate the water turbine blade all is installed on the set main shaft 3, and rotate with main shaft, huge upper and lower steering force (tens～hundreds of T) is cancelled out each other in set main shaft inside.Therefore, every electricity consumption-machine operation mechanism replaces cylinder system, and operating device all is installed in the aperture of regulating the water turbine blade on the set main shaft, all belongs to protection scope of the present invention.
Claims (8)
1. the electricity of a water turbine blade-machine operation mechanism, comprise servo-system and driving mechanism, servo-system adopts actuating motor, speed reducer and control circuit thereof, it is characterized in that: driving mechanism adopts the bolt and nut nested structure, the output shaft of actuating motor and the speed reducer trapezoidal screw interior with placing set main shaft is connected, trapezoidal nut cover epimere is threaded with trapezoidal screw, and lower end attended operation axle, service axis directly connect the blade operating mechanism in the Hydraulic Turbine Rotor.
2. the electricity of water turbine blade according to claim 1-machine operation mechanism is characterized in that: actuating motor and speed reducer are fixed on the upper end of set main shaft by support, are connected with set main shaft by doubledirection thrust bearing.
3. the electricity of water turbine blade according to claim 1 and 2-machine operation mechanism is characterized in that: actuating motor adopts DC servo motor, and speed reducer adopts harmonic speed changer.
4. the electricity of water turbine blade according to claim 1 and 2-machine operation mechanism, it is characterized in that: put at trapezoidal nut the electrical feedback device that direct reflection blade corner changes is housed, the control circuit of electrical feedback device and actuating motor is connected, and forms closed loop control.
5. the electricity of water turbine blade according to claim 3-machine operation mechanism, it is characterized in that: put at trapezoidal nut the electrical feedback device that direct reflection blade corner changes is housed, the control circuit of electrical feedback device and DC servo motor is connected, and forms closed loop control.
6. the electricity of water turbine blade according to claim 1 and 2-machine operation mechanism is characterized in that: actuating motor control circuit and power supply are connected with actuating motor by collector ring.
7. the electricity of water turbine blade according to claim 3-machine operation mechanism is characterized in that: actuating motor control circuit and power supply are connected with DC servo motor by collector ring.
8. the electricity of water turbine blade according to claim 4-machine operation mechanism is characterized in that: actuating motor control circuit and power supply are connected with actuating motor by collector ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031184529A CN1177134C (en) | 2003-01-10 | 2003-01-10 | Electric/mechanic operating mechanism of hydraulic turbine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031184529A CN1177134C (en) | 2003-01-10 | 2003-01-10 | Electric/mechanic operating mechanism of hydraulic turbine blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424500A CN1424500A (en) | 2003-06-18 |
| CN1177134C true CN1177134C (en) | 2004-11-24 |
Family
ID=4790782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031184529A Expired - Fee Related CN1177134C (en) | 2003-01-10 | 2003-01-10 | Electric/mechanic operating mechanism of hydraulic turbine blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177134C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606377A (en) * | 2012-03-27 | 2012-07-25 | 天津市数控及传动技术应用研究所 | Rotary outputting water-turbine electric speed regulator without arm grip |
| CN105089919A (en) * | 2015-06-24 | 2015-11-25 | 天津电气科学研究院有限公司 | Operation method of preventing oil-supply head from oil mixing for hydro turbine governor |
| CN107989743A (en) * | 2017-12-07 | 2018-05-04 | 国家电网公司 | A kind of Kaplan turbine water-saving and synergistic adjusting method and regulating system |
| CN109831058B (en) * | 2019-01-24 | 2020-08-21 | 中国科学院长春光学精密机械与物理研究所 | Displacement actuator |
-
2003
- 2003-01-10 CN CNB031184529A patent/CN1177134C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1424500A (en) | 2003-06-18 |
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Granted publication date: 20041124 Termination date: 20160110 |
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| EXPY | Termination of patent right or utility model |