CN201650941U - Unidirectional and quick-retracting battery solution servo system - Google Patents
Unidirectional and quick-retracting battery solution servo system Download PDFInfo
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- CN201650941U CN201650941U CN2010290980339U CN201029098033U CN201650941U CN 201650941 U CN201650941 U CN 201650941U CN 2010290980339 U CN2010290980339 U CN 2010290980339U CN 201029098033 U CN201029098033 U CN 201029098033U CN 201650941 U CN201650941 U CN 201650941U
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Abstract
Provided is an unidirectional and fast-retracting battery solution servo system, which relates to the technical field of valve control and resolves the technical problem that the control precision and response speed can not be simultaneously ensured by prior art. The actuating mechanism comprises a servo control fluid path, a fast-retracting control fluid path and a fuel tank. The servo control fluid path comprising a servo motor, a bidirectional pump, an oil servo motor and four hydraulic control check valve is used for low-speed precision control of a steam turbine valve. The fast-retracting control fluid path comprising a quick shutting valve, an energy storage pump motor, an energy storage pump, a high-voltage energy storage device, a quick shutting solenoid valve, an upper pressure switch and a lower pressure switch is used for a quick motion control of a steam turbine valve. The utility model has advantages of quick response speed, high control precision and low operation cost.
Description
Technical field
The utility model relates to the technology of valve control, particularly relates to a kind of technology of electrohydraulic servo system of one-way fast retractile.
Background technique
The aperture of steam turbine valve is all by being controlled by hydraulic system, traditional steam turbine control system all adopts the electrohydraulic servo system of valve control oil engine, this system (referring to Fig. 2) adopts the electrohydraulic control Hs by outside fuel feeding, the filler opening of electrohydraulic control Hs is connected outside oil sources respectively with return opening, and two control ports connect two active chambers of piston type oil engine U2 respectively; Transfer valve bit instruction signal during operation, the valve position feedback signal LVDT of oil engine U2 after transferring electrical signal to, demodulator TD is compared with valve position command signal C, and according to comparative result control electrohydraulic control Hs action, and then the piston stroke of control oil engine U2.Because electrohydraulic control has speed of response faster, therefore this system can satisfy the requirement of the regulating system of feed pump turbine to quick response well.But because the intrinsic structural feature of electrohydraulic control itself, make this system have following shortcoming: 1) requirement on machining accuracy of electrohydraulic control is higher, and its price is very expensive; 2) because the electro-hydraulic servo valve arrangement is tiny and valve body is fragile, therefore responsive especially to oil contamination, its spool is caused malfunctioning easily by the wearing and tearing of the impurity in the fluid, therefore must be equipped with the very high filtration system of filter precision; 3) because electrohydraulic control is responsive to temperature variation, and the energy loss of valve control oil engine electrohydraulic servo system is very serious, and its throttling heating is bigger, therefore must be equipped with more perfect cooling system; 4), thereby the volume and the complexity of entire system have been increased because electrohydraulic control by outside fuel feeding, therefore needs a cover pumping station system that constant pressure oil source is provided; 5) be in inoperative during the cycle (pressurize operating mode and idle running operating mode) when system, system still locates running state, has increased operating cost.Above-mentioned shortcoming makes that the cost of valve control oil engine electrohydraulic servo system is higher.
In order to overcome the shortcoming of valve control oil engine electrohydraulic servo system, a kind of directly driven volume controlled electro-hydraulic servo system (DDVC system) has appearred, the hydraulic main circuit of this system (referring to Fig. 3) adopts closed oil circuit, two hydraulic fluid ports of its oil pump D3 connect two active chambers of piston type oil engine U3 respectively, also are provided with hydraulic control oil sucting one-way valve (two Pilot operated check valve H31, H32) that is used for balance sysmte oil mass difference in volume of positive and negative when operation and the hydraulic control outlet valve (two Pilot operated check valve H33, H34) that is used to pin piston rod in system; Control the output flow of oil pump D3 and the flow direction of hydraulic oil by AC servo motor M3 during operation, and then the piston stroke of control oil engine U3.This system has the following advantages: 1) because hydraulic main circuit is a closed circuit, therefore system with oil mass seldom and be subjected to the outside contamination chance less only needs little fuel tank (oil tank) get final product, and does not have sensing element in the system, so also do not need to be equipped with filtrating equipment; 2) owing to do not have throttle element in the directly driven volume controlled electro-hydraulic servo system, pressure loss is very little, so the heat that oil pump when work produces seldom, and system can not need to be equipped with cooling system from heat radiation; When 3) system only work in actuator, just start AC servo motor, when system is in inoperative (the pressurize operating mode and the operating mode that dallies) consumed energy hardly during the cycle, its operating cost is very low.Therefore directly driven volume controlled electro-hydraulic servo system relative valve control oil engine electrohydraulic servo system cost is lower, but because the sensitivity of AC servo motor and oil pump combination will be lower than the sensitivity of electrohydraulic control, therefore the speed of response of this system is slower, can't be applied to the large steam turbine higher to the quick closing valve functional requirement.
The model utility content
At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provide a kind of speed of response fast, the control accuracy height, the electrohydraulic servo system of the one-way fast retractile that operating cost is low.
In order to solve the problems of the technologies described above, the electrohydraulic servo system of a kind of one-way fast retractile provided by the utility model comprises servocontrol liquid road and fuel tank; Described servocontrol liquid road comprises actuating motor, two-way pump, oil engine and four Pilot operated check valves; Described actuating motor connects and the operation of control two-way pump; Described four Pilot operated check valves are respectively first Pilot operated check valve, second Pilot operated check valve, the 3rd Pilot operated check valve, the 4th Pilot operated check valve;
Described oil engine has two active chambers, is respectively rod chamber and rodless cavity; Described two-way pump has two hydraulic fluid ports, is respectively first hydraulic fluid port and second hydraulic fluid port, and its first hydraulic fluid port is through the rod chamber of first Pilot operated check valve connection oil engine, and its second hydraulic fluid port connects the rodless cavity of oil engine through second Pilot operated check valve; Described fuel tank connects second hydraulic fluid port of two-way pump through first hydraulic fluid port of the 3rd Pilot operated check valve connection two-way pump through the 4th Pilot operated check valve; The control port of described the first, the 3rd Pilot operated check valve connects second hydraulic fluid port of two-way pump, and the control port of described the second, the 4th Pilot operated check valve connects first hydraulic fluid port of two-way pump;
Be provided with displacement transducer in the described oil engine, described displacement transducer connects and the operation of control actuating motor through a demodulator, a servoamplifier;
It is characterized in that: also wrap fast retractile control liquid road; Described fast retractile control liquid road comprises quick closing valve safety valve, energy storage pump motor, energy storage pump, high-voltage energy storage device, quick closing valve solenoid valve, upward pressure switch and downforce switch;
Described quick closing valve safety valve has a control port, a filler opening and an oil outlet, and its oil outlet is through the rod chamber of one-way valve connection oil engine, and its filler opening connects fuel tank through a relief valve;
Described high-voltage energy storage device is connected to fuel tank through a normal close type fuel outlet valve, connects the filler opening of quick closing valve safety valve through an open type oiling valve;
Described upward pressure switch is connected with the downforce switch and controls the energy storage pump motor and move; Described energy storage pump motor connects and control energy storage pump operation;
Described quick closing valve solenoid valve has a return opening, a filler opening and an oil outlet, and its oil outlet first quarter stream valve connects the control port of quick closing valve safety valve, and its return opening connects fuel tank;
The filler opening of described energy storage pump connects fuel tank through an open type stop valve, connects outside oil sources through a normal close type stop valve, and its oil outlet connects the filler opening of quick closing valve safety valve and the filler opening of quick closing valve solenoid valve respectively through an one-way valve, a filter;
Described fuel tank is through the rodless cavity of hydraulic control return check valve connection oil engine, and the control port of this hydraulic control return check valve connects the oil outlet of quick closing valve safety valve.
Further, described fuel tank is provided with a filler opening, and its filler opening connects outside air through a prepressing type air-strainer.
The electrohydraulic servo system of the one-way fast retractile that the utility model provides, by actuating motor and two-way pump steam turbine valve being carried out low speed accurately controls, by accumulator, quick closing valve solenoid valve steam turbine valve is carried out quick acting control, so its control accuracy height, speed of response is fast; And because oil engine is directly driven by actuating motor, compare with the hydraulic actuator of servovalve driving oil engine, its effective working pressure has improved 1/3rd, also be same size oil engine push-pull effort big 1/3rd; Requirement to hydraulic system hydraulic pressure turbidity test also can be reduced to the NAS8 level from the NAS5 level of servo valve control system, greatly reduces the cost of system's operation maintenance, has improved reliability of system operation.
Description of drawings
Fig. 1 is the hydraulic diagram of electrohydraulic servo system of the utility model embodiment's one-way fast retractile;
Fig. 2 is the hydraulic diagram of the electrohydraulic servo system of existing valve control oil engine;
Fig. 3 is the hydraulic diagram of existing directly driven volume controlled electro-hydraulic servo system.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1, the electrohydraulic servo system of a kind of one-way fast retractile that the utility model embodiment is provided comprises servocontrol liquid road and fuel tank N2; Described servocontrol liquid road comprises actuating motor SM1, two-way pump PM1, oil engine CY1 and four Pilot operated check valves; Described actuating motor SM1 connects and control two-way pump PM1 operation; Described four Pilot operated check valves are respectively the first Pilot operated check valve R1, the second Pilot operated check valve R2, the 3rd Pilot operated check valve R4, the 4th Pilot operated check valve R5;
Described oil engine CY1 has two active chambers, is respectively rod chamber and rodless cavity; Described two-way pump PM1 has two hydraulic fluid ports, is respectively first hydraulic fluid port and second hydraulic fluid port, and its first hydraulic fluid port is through the rod chamber of first Pilot operated check valve R1 connection oil engine CY1, and its second hydraulic fluid port connects the rodless cavity of oil engine CY1 through the second Pilot operated check valve R2; Described fuel tank N2 connects second hydraulic fluid port of two-way pump PM1 through first hydraulic fluid port of the 3rd Pilot operated check valve R4 connection two-way pump PM1 through the 4th Pilot operated check valve R5; The control port of described the first, the 3rd Pilot operated check valve connects second hydraulic fluid port of two-way pump PM1, and the control port of described the second, the 4th Pilot operated check valve connects first hydraulic fluid port of two-way pump PM1;
Be provided with displacement transducer in the described oil engine CY1, described displacement transducer connects and control actuating motor SM1 operation through a demodulator TD1, a servoamplifier S1;
It is characterized in that: also wrap fast retractile control liquid road; Described fast retractile control liquid road comprises quick closing valve safety valve CTV3, energy storage pump motor EM1, energy storage pump PM0, high-voltage energy storage device N1, quick closing valve solenoid valve CCF, upward pressure switch P S1 and downforce switch P S2;
Described quick closing valve safety valve CTV3 has a control port, a filler opening and an oil outlet, and its oil outlet is through the rod chamber of one-way valve R6 connection oil engine CY1, and its filler opening connects fuel tank N2 through a relief valve RF;
Described high-voltage energy storage device N1 is connected to fuel tank N2 through a normal close type fuel outlet valve, connects the filler opening of quick closing valve safety valve CTV3 through an open type oiling valve;
Described upward pressure switch P S1 is connected with downforce switch P S2 and controls energy storage pump motor EM1 and move; Described energy storage pump motor EM1 connects and control energy storage pump PM0 operation;
Described quick closing valve solenoid valve CCF has a return opening, a filler opening and an oil outlet, and its oil outlet first quarter stream valve ORI2 connects the control port of quick closing valve safety valve CTV3, and its return opening connects fuel tank N2;
The filler opening of described energy storage pump PM0 connects fuel tank N2 through an open type stop valve SH2, connect outside oil sources through a normal close type stop valve SH1, its oil outlet connects the filler opening of quick closing valve safety valve CTV3 and the filler opening of quick closing valve solenoid valve CCF respectively through an one-way valve R0, a filter F L;
Described fuel tank N2 is through the rodless cavity of hydraulic control return check valve R3 connection oil engine CY1, and the control port of this hydraulic control return check valve connects the oil outlet of quick closing valve safety valve CTV3.
Among the utility model embodiment, described fuel tank N2 is provided with a filler opening, and its filler opening connects outside air through a prepressing type air-strainer YLS; The rodless cavity of described oil engine CY1 is connected to an oil engine pressure transducer I2, and its rod chamber is connected to an oil engine pressure transducer I1; Described fuel tank N2 is connected to a reservoir pressure table M2 and a reservoir pressure sensor I0; The filler opening of described quick closing valve safety valve CTV3 is connected to a high-pressure manometer M1;
Among the utility model embodiment, described fuel tank N2 is provided with oil storage pressure tap PT4, described oil storage pressure tap PT4 connects fuel tank N2 through an one-way valve, the filler opening of described quick closing valve safety valve CTV3 is provided with high pressure pressure tap PT5, and described high pressure pressure tap PT5 connects the filler opening of quick closing valve safety valve CTV3 through an one-way valve;
When the utility model embodiment controls steam turbine valve, with the servoamplifier S1 in the valve position signal CTRL access execution loop of steam turbine valve;
Under normal state, quick closing valve solenoid valve CCF is in "on" position, this moment, its filler opening was communicated with its oil outlet, high pressure oil in the high-voltage energy storage device is loaded on the control port of quick closing valve safety valve CTV3 through quick closing valve solenoid valve CCF, make quick closing valve safety valve CTV3 close, steam turbine valve carries out low speed by actuating motor SM1 according to the feedback signal of the valve position control signal CTRL of steam turbine valve and the displacement transducer in the oil engine CY1 and accurately controls, when the valve position control signal CTRL that detects steam turbine valve as servoamplifier S1 changes, after the feedback signal that is about to itself and displacement transducer compares changing value is delivered to actuating motor SM1, actuating motor SM1 is according to above-mentioned changing value control two-way pump PM1 forward or reverse, and then the piston rod of control oil engine CY1 stretches out or withdraw, makes the piston rod drive steam turbine valve of oil engine CY1 make corresponding action;
When steam turbine valve needs quick acting, quick closing valve solenoid valve CCF is in power failure state, this moment, its return opening was communicated with its oil outlet, the control port decompression of quick closing valve safety valve CTV3, make quick closing valve safety valve CTV3 conducting, high pressure oil among the high-voltage energy storage device N1 is loaded in the rod chamber of oil engine CY1 fast through quick closing valve safety valve CTV3, one-way valve R6, hydraulic oil in the rodless cavity of oil engine CY1 is back to fuel tank N2 fast by Pilot operated check valve R3, make the piston rod fast retractile of oil engine, thereby drive the valve quick closedown of steam turbine;
When pressure switch PS2 detects pressure in the quick control loop and is lower than minimum setting value instantly, promptly send actuating signal to energy storage pump motor EM1, energy storage pump motor EM1 receives that promptly to control energy storage pump PM0 operation after the actuating signal oil-filled to the quick control loop; When upward pressure switch P S1 detects pressure in the quick control loop and is higher than the highest setting value, promptly send stop signal to energy storage pump motor EM1, energy storage pump motor EM1 receives that promptly to control energy storage pump PM0 after the stop signal out of service; When the pressure in the quick control loop surpassed the highest setting value, pressure was by relief valve RF overflow, thereby provided overvoltage protection for system; When system need replenish hydraulic oil, earlier outside oil sources is connected to the normal close type stop valve SH1 of energy storage pump PM0 filler opening, open this normal close type stop valve SH1 then and can replenish hydraulic oil;
Among the utility model embodiment, the oil outlet first quarter of described quick closing valve safety valve CTV3 stream valve ORI1 connects fuel tank N2, and when oil impregnate took place quick closing valve safety valve CTV3, throttle valve ORI1 can prevent that Pilot operated check valve R3 from opening, and guaranteed the normal of system.
Claims (2)
1. the electrohydraulic servo system of an one-way fast retractile comprises servocontrol liquid road and fuel tank; Described servocontrol liquid road comprises actuating motor, two-way pump, oil engine and four Pilot operated check valves; Described actuating motor connects and the operation of control two-way pump; Described four Pilot operated check valves are respectively first Pilot operated check valve, second Pilot operated check valve, the 3rd Pilot operated check valve, the 4th Pilot operated check valve;
Described oil engine has two active chambers, is respectively rod chamber and rodless cavity; Described two-way pump has two hydraulic fluid ports, is respectively first hydraulic fluid port and second hydraulic fluid port, and its first hydraulic fluid port is through the rod chamber of first Pilot operated check valve connection oil engine, and its second hydraulic fluid port connects the rodless cavity of oil engine through second Pilot operated check valve; Described fuel tank connects second hydraulic fluid port of two-way pump through first hydraulic fluid port of the 3rd Pilot operated check valve connection two-way pump through the 4th Pilot operated check valve; The control port of described the first, the 3rd Pilot operated check valve connects second hydraulic fluid port of two-way pump, and the control port of described the second, the 4th Pilot operated check valve connects first hydraulic fluid port of two-way pump;
Be provided with displacement transducer in the described oil engine, described displacement transducer connects and the operation of control actuating motor through a demodulator, a servoamplifier;
It is characterized in that: also wrap fast retractile control liquid road; Described fast retractile control liquid road comprises quick closing valve safety valve, energy storage pump motor, energy storage pump, high-voltage energy storage device, quick closing valve solenoid valve, upward pressure switch and downforce switch;
Described quick closing valve safety valve has a control port, a filler opening and an oil outlet, and its oil outlet is through the rod chamber of one-way valve connection oil engine, and its filler opening connects fuel tank through a relief valve;
Described high-voltage energy storage device is connected to fuel tank through a normal close type fuel outlet valve, connects the filler opening of quick closing valve safety valve through an open type oiling valve;
Described upward pressure switch is connected with the downforce switch and controls the energy storage pump motor and move; Described energy storage pump motor connects and control energy storage pump operation;
Described quick closing valve solenoid valve has a return opening, a filler opening and an oil outlet, and its oil outlet first quarter stream valve connects the control port of quick closing valve safety valve, and its return opening connects fuel tank;
The filler opening of described energy storage pump connects fuel tank through an open type stop valve, connects outside oil sources through a normal close type stop valve, and its oil outlet connects the filler opening of quick closing valve safety valve and the filler opening of quick closing valve solenoid valve respectively through an one-way valve, a filter;
Described fuel tank is through the rodless cavity of hydraulic control return check valve connection oil engine, and the control port of this hydraulic control return check valve connects the oil outlet of quick closing valve safety valve.
2. the electrohydraulic servo system of one-way fast retractile according to claim 1, it is characterized in that: described fuel tank is provided with a filler opening, and its filler opening connects outside air through a prepressing type air-strainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290980339U CN201650941U (en) | 2010-02-08 | 2010-02-08 | Unidirectional and quick-retracting battery solution servo system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290980339U CN201650941U (en) | 2010-02-08 | 2010-02-08 | Unidirectional and quick-retracting battery solution servo system |
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| CN201650941U true CN201650941U (en) | 2010-11-24 |
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| CN2010290980339U Expired - Fee Related CN201650941U (en) | 2010-02-08 | 2010-02-08 | Unidirectional and quick-retracting battery solution servo system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999695A (en) * | 2015-06-15 | 2015-10-28 | 浙江大学 | Electro-hydraulic control system capable of achieving ultralow-speed stable running of hydraulic machine |
| CN109296572A (en) * | 2018-11-08 | 2019-02-01 | 九江东升科技开发有限公司 | A kind of novel single-acting electrohydraulic actuator self-insurance control device |
| CN111550458A (en) * | 2020-04-27 | 2020-08-18 | 杭州澎康自动化科技有限公司 | Steam turbine pump cylinder control servo system and control method thereof |
-
2010
- 2010-02-08 CN CN2010290980339U patent/CN201650941U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999695A (en) * | 2015-06-15 | 2015-10-28 | 浙江大学 | Electro-hydraulic control system capable of achieving ultralow-speed stable running of hydraulic machine |
| CN104999695B (en) * | 2015-06-15 | 2016-09-28 | 浙江大学 | A kind of electrohydraulic control system realizing hydraulic press Ultra-Low Speed stable operation |
| CN109296572A (en) * | 2018-11-08 | 2019-02-01 | 九江东升科技开发有限公司 | A kind of novel single-acting electrohydraulic actuator self-insurance control device |
| CN111550458A (en) * | 2020-04-27 | 2020-08-18 | 杭州澎康自动化科技有限公司 | Steam turbine pump cylinder control servo system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20150208 |
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| EXPY | Termination of patent right or utility model |