CN102721204A - Hydraulic driving device and driving method used for trench type heat collecting system - Google Patents
Hydraulic driving device and driving method used for trench type heat collecting system Download PDFInfo
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- CN102721204A CN102721204A CN2012102125892A CN201210212589A CN102721204A CN 102721204 A CN102721204 A CN 102721204A CN 2012102125892 A CN2012102125892 A CN 2012102125892A CN 201210212589 A CN201210212589 A CN 201210212589A CN 102721204 A CN102721204 A CN 102721204A
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a hydraulic driving device and a driving method used for a trench type heat collecting system. The hydraulic driving device is characterized in that an oil tank is arranged, and a micropump, an oil absorbing and filtering machine and an oil returning filter are arranged in the oil tank; an asynchronous machine arranged at the upper part of the oil tank is connected with the micropump by a coupler; an oil inlet of the micropump is connected with the oil absorbing and filtering machine, an oil outlet of the micropump is connected with an overflow valve and an oil inlet of a check valve in parallel; an overflowing port of the overflowing valve is connected with the oil tank; an outlet of the check valve is connected with oil inlets P of two H-shaped three-position four-way electromagnetic valve in parallel; and oil return ports T of the H-shaped two three-position four-way electromagnetic valve are respectively connected with a driving oil cylinder by a balance valve block, and a work oil port A and a work oil port B of each H-shaped three-position four-way electromagnetic valve are correspondingly connected with the balance valve block, and are also correspondingly connected with a rod end and a rodless rod end of the driving oil cylinder. According to the hydraulic driving device and the driving method, the intermittent movement of the driving oil cylinder can be realized by conducting pulse power supply on the H-shaped three-position four-way electromagnetic valve, and the precision requirement of plus and minus 0.1 degree can be achieved.
Description
Technical field
The present invention relates to a kind of fluid pressure drive device and driving method, particularly about a kind of fluid pressure drive device and driving method that is used for the slot type collecting system.
Background technology
The slot type collecting system is widely used in solar light-heat power-generation and middle elevated temperature heat is utilized in the process, receives various countries new forms of energy researcher's close attention.The concrete mode of slot type thermal-arrest is through the paraboloid trough type condenser mirror sunshine to be converged on the focal line, and tubular heat collector is installed on focal line, absorbs the solar radiant energy after focusing on.After fluid in the pipe is heated, carry out heat generating or heat utilization again through heat exchange.The slot type collecting system is from morning to night followed the tracks of sun operation from east to west, and the parallel north-south that is with focal line of heat collector axis arranges that this is a kind of pattern of the one dimension tracking sun, follows the tracks of simple and easyly, and optical efficiency is higher.
In the prior art, the tracking type of drive of slot type collecting system can be motor+decelerator, also can drive through hydraulic system.Compare with motor drive mode, the driving force of hydraulic system is stronger, and wind loading rating is better, and unit price is lower, and is with the obvious advantage.As shown in Figure 1, be a kind of more typical hydraulic jack driving mechanism.Generally speaking; The rotational angle range of heat accumulator 1 should reach more than 180 degree; Therefore adopt two oil cylinders 2 to drive through rotating shaft 3, when the acting force arm of one of them oil cylinder 2 was zero (promptly being in the dead-centre position), the acting force arm of another oil cylinder 2 reached maximum; So just can realize not having the Continuous Drive at dead point, and bring into play the driving force of each oil cylinder 2 to greatest extent.
Collecting system mainly contains following four aspects for the requirement of tracking and driving system: 1) be will have enough big driving moment to overcome wind load; 2) must guarantee enough tracking accuracies, generally be to reach ± 0.1 °; 3) need possess the driving force of utmost point low speed to the tracking of the sun, specific to the movement velocity of oil cylinder, minimum speed is merely about 0.01 mm/second in theory; 4) possesses the high speed return ability of (attacking) under the night or the state of emergency such as strong wind.Existing fluid power system generally is the mode that adopts proportioning valve, servo valve or servo-cylinder.The patent No. 201010529654.5 discloses a kind of ratio hydraulic pressure tracking system separately with the patent No. 201020673408.2, adopts proportional servo reversal valve and servo-cylinder, through the speed of feedback signal control oil cylinder, carries out Continuous Drive.The advantage of these modes is that control accuracy is high, and especially theoretical resolution can reach micron order (0.001 millimeter), but shortcoming is element cost height, and is strict to the cleannes of hydraulic oil, is unfavorable for open-air long-time running; The long-time band of motor and oil pump carries work, and energy consumption is higher, and the hydraulic oil heating is serious, need take cooling measure; Owing to the frictional force reason of elements such as driving oil cylinder, rolling bearing, when the little feeding of execution drives, creeping phenomenon can appear inevitably, so the true resolution of hydraulic oil cylinder driving can not reach micron order.In addition, according to ± 0.1 ° tracking accuracy requirement, do not need the driving resolution ratio of oil cylinder to reach micron order in fact, too high in theory resolution ratio both there is no need, and in fact also can't reach.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of cost is low, reliability is high fluid pressure drive device that is used for the slot type collecting system and driving method.
For realizing above-mentioned purpose, the present invention takes following technical scheme: a kind of fluid pressure drive device that is used for the slot type collecting system is characterized in that: it comprises a fuel tank, is provided with micropump, oil suction oil filter and return filter in the said fuel tank; Said fuel tank top is provided with asynchronous machine, and said asynchronous machine connects said micropump through shaft coupling; The oil-in of said micropump connects the oil suction oil filter through oil circuit, and oil-out is through the be connected in parallel oil-in of overflow valve and check valve of oil circuit; The overfall of said overflow valve connects fuel tank through oil circuit; The outlet of said check valve is through the be connected in parallel oil inlet P of two H type three position four-way electromagnetic valves of oil circuit; The oil return inlet T of two said H type three position four-way electromagnetic valves all connects the inlet of said return filter through oil circuit, the outlet of said return filter connects said fuel tank through oil circuit; Two said H type three position four-way electromagnetic valves connect a driving oil cylinder through a balanced valve piece separately; The actuator port A of each said H type three position four-way electromagnetic valve and corresponding two interfaces that are connected a said balanced valve piece of actuator port B, corresponding again rod end and the rear end that connects a said driving oil cylinder of two other interface of said balanced valve piece.
On the said return filter through oil circuit be connected in parallel differential pressure transmitter device and by-passing valve.
Also be provided with liquid-level switch and temperature detect switch (TDS) in the said fuel tank.
Above-mentioned a kind of driving method that is used for the fluid pressure drive device of slot type collecting system; It may further comprise the steps: 1) intermittently follow the tracks of drive pattern: at set intervals; Position of sun change certain angle; H type three position four-way electromagnetic valve gets once electric, and driving oil cylinder work once makes heat accumulator reach the position of following the tracks of the sun; Stop power supply, H type three position four-way electromagnetic valve is got back to meta, gets back to fuel tank from the oil of oil pump through H type three position four-way electromagnetic valve, and whole drive unit is not with pressure, asynchronous machine and micropump no-load operation; 2) high speed return pattern: under the night or the state of emergency, H type three position four-way electromagnetic valve all the time electric, the driving oil cylinder continuous operation makes the heat accumulator returning quickly; 3) stop mode: when the slot type collecting system quit work, asynchronous machine quit work, and H type three position four-way electromagnetic valve is in meta, and two driving oil cylinder of two balanced valve piece lockings guarantee that the position of driving oil cylinder does not change, and heat accumulator is by locking.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention is through realizing the intermittent movement of driving oil cylinder to H type three position four-way electromagnetic valve pulse power supply; Each interlude is decided according to on-site longitude and latitude and time, can reach ± 0.1 ° required precision.2, the present invention has avoided driving oil cylinder to cross the low creeping phenomenon that brings because of speed owing to take the intermittently mode of driving.3, the present invention can carry out continuous oil supply to driving oil cylinder through H type three position four-way electromagnetic valve, to realize the high speed return ability of (attacking such as strong wind) under the night or the state of emergency.4, the present invention is because the employing meta is the H type three position four-way electromagnetic valve of H type function, and in the intermittent time between per twice driving, the fuel feeding of oil pump can directly be got back to fuel tank; System is in unloading condition; Consumed power is very little, has not only saved the energy, also helps controlling the rising of oil temperature.5, the present invention need not adopt the higher proportioning valve of cost, servo valve and servo-cylinder with H type three position four-way electromagnetic valve, greatly reduces cost.6, intermittently used H type three position four-way electromagnetic valve of the present invention is compared with proportioning valve that needs long time continuous working or servo valve, and the life-span prolongs greatly.7, the present invention requires to reduce greatly to the hydraulic pressure oil filtration owing to only use switch valve, can save the system maintenance cost.Simple and ingenious structure of the present invention, easy to operate, cost is low, can satisfy the tracking accuracy requirement, can be widely used in the driving process of slot type collecting system.
Description of drawings
Fig. 1 is a kind of more typical hydraulic jack driving mechanism sketch map in the prior art
Fig. 2 is a fluid power system principle schematic of the present invention
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
As shown in Figure 2, the present invention includes a fuel tank 4, be provided with liquid-level switch 5, temperature detect switch (TDS) 6, micropump 7, oil suction oil filter 8 and return filter 9 in the fuel tank 4; Fuel tank 4 tops are provided with asynchronous machine 10, and asynchronous machine 10 connects the micropump 7 in the fuel tank 4 through shaft coupling; The oil-in of micropump 7 connects oil suction oil filter 8 through oil circuit, and oil-out is through the be connected in parallel oil-in of overflow valve 11 and check valve 12 of oil circuit; The outlet of overflow valve 11 connects fuel tank 4 through oil circuit; The outlet of check valve 12 is through the be connected in parallel oil inlet P of two H type three position four-way electromagnetic valves 13 of oil circuit; The oil return inlet T of two H type three position four-way electromagnetic valves 13 all connects the inlet of return filter 9 through oil circuit, the outlet of return filter 9 connects fuel tank 4 through oil circuit.
Two H type three position four-way electromagnetic valves 13 of the present invention connect a driving oil cylinder 15 through a balanced valve piece 14 separately; Balanced valve piece 14 is arranged on the corresponding driving oil cylinder 15; Specifically be connected to: actuator port A on each H type three position four-way electromagnetic valve 13 and corresponding two interfaces on the balanced valve piece 14, corresponding rod end and the rear end that connects a driving oil cylinder 15 of two other interface on the balanced valve piece 14 of being connected of actuator port B.
On the return filter 9 of the present invention through oil circuit be connected in parallel differential pressure transmitter device 16 and by-passing valve 17; When filter 9 stops up, the pressure differential at by-passing valve 17 two ends is during greater than preset value, and by-passing valve 17 is opened; Oil return oil filter 9 quits work; Differential pressure transmitter device 16 sends signal and gives central control system simultaneously, by the attendant return filter 9 is cleaned or changes, to guarantee the cleaning in the fuel tank 4.
In the foregoing description, central control system can adopt existing techniques in realizing to the control of fluid pressure drive device of the present invention, no longer specifies at this.
Fluid pressure drive device of the present invention is used to drive the slot type collecting system, and two driving oil cylinder 15 connect heat accumulator through rotating shaft, drives the heat accumulator tracking sun and turns round continuously, and it specifically comprises following several kinds of operational modes:
1) intermittently follows the tracks of drive pattern: at set intervals; Position of sun change certain angle, H type three position four-way electromagnetic valve 13 gets once electric, and driving oil cylinder 15 work are once; Make heat accumulator reach the position (promptly following the tracks of the position of the sun) of sensor requirement, can avoid occurring creeping phenomenon; Stop power supply, H type three position four-way electromagnetic valve 13 is got back to meta, gets back to fuel tank 4 from the oil of oil pump through H type three position four-way electromagnetic valve 13; Pressure is not with in whole loop; Asynchronous machine 10 can be with the work of carrying with micropump 7, and energy consumption is lower, is beneficial to the rising of control oil temperature yet.
2) high speed return pattern: under the night or the state of emergency (when attacking) such as strong wind, H type three position four-way electromagnetic valve 13 all the time electric, driving oil cylinder 15 continuous operations make the heat accumulator returning quickly.
3) stop mode: when the slot type collecting system quits work; Asynchronous machine 10 quits work, and H type three position four-way electromagnetic valve 13 is in meta, by two driving oil cylinder 15 of two balanced valve pieces, 14 lockings; The position that guarantees driving oil cylinder 15 does not change, and heat accumulator is by locking.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (4)
1. fluid pressure drive device that is used for the slot type collecting system, it is characterized in that: it comprises a fuel tank, is provided with micropump, oil suction oil filter and return filter in the said fuel tank; Said fuel tank top is provided with asynchronous machine, and said asynchronous machine connects said micropump through shaft coupling; The oil-in of said micropump connects the oil suction oil filter through oil circuit, and oil-out is through the be connected in parallel oil-in of overflow valve and check valve of oil circuit; The overfall of said overflow valve connects fuel tank through oil circuit; The outlet of said check valve is through the be connected in parallel oil inlet P of two H type three position four-way electromagnetic valves of oil circuit; The oil return inlet T of two said H type three position four-way electromagnetic valves all connects the inlet of said return filter through oil circuit, the outlet of said return filter connects said fuel tank through oil circuit; Two said H type three position four-way electromagnetic valves connect a driving oil cylinder through a balanced valve piece separately; The actuator port A of each said H type three position four-way electromagnetic valve and corresponding two interfaces that are connected a said balanced valve piece of actuator port B, corresponding again rod end and the rear end that connects a said driving oil cylinder of two other interface of said balanced valve piece.
2. a kind of fluid pressure drive device that is used for the slot type collecting system as claimed in claim 1 is characterized in that: on the said return filter through oil circuit be connected in parallel differential pressure transmitter device and by-passing valve.
3. like a kind of fluid pressure drive device that is used for the slot type collecting system of claim 1 or 2, it is characterized in that: also be provided with liquid-level switch and temperature detect switch (TDS) in the said fuel tank.
4. one kind like claim 1 or 2 or 3 each described driving methods that are used for the fluid pressure drive device of slot type collecting system, and it may further comprise the steps:
1) intermittently follow the tracks of drive pattern: at set intervals, position of sun change certain angle, H type three position four-way electromagnetic valve gets once electric, and driving oil cylinder work once makes heat accumulator reach the position of following the tracks of the sun; Stop power supply, H type three position four-way electromagnetic valve is got back to meta, gets back to fuel tank from the oil of oil pump through H type three position four-way electromagnetic valve, and whole drive unit is not with pressure, asynchronous machine and micropump no-load operation;
2) high speed return pattern: under the night or the state of emergency, H type three position four-way electromagnetic valve all the time electric, the driving oil cylinder continuous operation makes the heat accumulator returning quickly;
3) stop mode: when the slot type collecting system quit work, asynchronous machine quit work, and H type three position four-way electromagnetic valve is in meta, and two driving oil cylinder of two balanced valve piece lockings guarantee that the position of driving oil cylinder does not change, and heat accumulator is by locking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102125892A CN102721204A (en) | 2012-06-21 | 2012-06-21 | Hydraulic driving device and driving method used for trench type heat collecting system |
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| CN2012102125892A CN102721204A (en) | 2012-06-21 | 2012-06-21 | Hydraulic driving device and driving method used for trench type heat collecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997451A (en) * | 2012-12-25 | 2013-03-27 | 东南大学 | Hydraulic drive device of parabolic trough condensing solar collector |
| CN108612689A (en) * | 2018-07-13 | 2018-10-02 | 北京亿美博科技有限公司 | A kind of hydraulic control system and method for large-angle slewing mechanism |
| CN111207525A (en) * | 2020-02-10 | 2020-05-29 | 南京南瑞继保电气有限公司 | Intermittent driving method and device for heat collecting groove of groove type photo-thermal solar system |
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| US6123067A (en) * | 1999-03-31 | 2000-09-26 | Amonix, Inc. | Solar collector tracking system |
| WO2009087257A1 (en) * | 2008-01-10 | 2009-07-16 | Hydra-Power, S.L. | Safety system for defocusing and detecting the position of solar trackers |
| CN101507888A (en) * | 2009-02-27 | 2009-08-19 | 洛阳航峰自动化设备有限公司 | Double-monitor filter |
| EP2226592A1 (en) * | 2009-03-04 | 2010-09-08 | HAWE Hydraulik SE | Electrohydraulic tracking device for a solar generator |
| US20100300429A1 (en) * | 2009-05-26 | 2010-12-02 | Young & Franklin, Inc. | Actuator-based drive system for solar collector |
| CN101982655A (en) * | 2010-11-03 | 2011-03-02 | 天津市欧曼液压装备系统工程有限公司 | Proportional and hydraulic tracking system for trough solar thermal power generating condenser |
| CN202002358U (en) * | 2010-12-22 | 2011-10-05 | 中国华电工程(集团)有限公司 | Solar-energy thermal generating trough type heat collector synchronous tracking hydraulic control device |
| CN202660795U (en) * | 2012-06-21 | 2013-01-09 | 北京电影机械研究所 | Hydraulic drive device used for slot-type heat collecting system |
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2012
- 2012-06-21 CN CN2012102125892A patent/CN102721204A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6123067A (en) * | 1999-03-31 | 2000-09-26 | Amonix, Inc. | Solar collector tracking system |
| WO2009087257A1 (en) * | 2008-01-10 | 2009-07-16 | Hydra-Power, S.L. | Safety system for defocusing and detecting the position of solar trackers |
| CN101507888A (en) * | 2009-02-27 | 2009-08-19 | 洛阳航峰自动化设备有限公司 | Double-monitor filter |
| EP2226592A1 (en) * | 2009-03-04 | 2010-09-08 | HAWE Hydraulik SE | Electrohydraulic tracking device for a solar generator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997451A (en) * | 2012-12-25 | 2013-03-27 | 东南大学 | Hydraulic drive device of parabolic trough condensing solar collector |
| CN108612689A (en) * | 2018-07-13 | 2018-10-02 | 北京亿美博科技有限公司 | A kind of hydraulic control system and method for large-angle slewing mechanism |
| CN111207525A (en) * | 2020-02-10 | 2020-05-29 | 南京南瑞继保电气有限公司 | Intermittent driving method and device for heat collecting groove of groove type photo-thermal solar system |
| CN111207525B (en) * | 2020-02-10 | 2021-05-28 | 南京南瑞继保电气有限公司 | Intermittent driving method and device for heat collecting groove of groove type photo-thermal solar system |
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Application publication date: 20121010 |