CN114352587A - Intelligent heliostat hydraulic drive system - Google Patents
Intelligent heliostat hydraulic drive system Download PDFInfo
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- CN114352587A CN114352587A CN202111618357.2A CN202111618357A CN114352587A CN 114352587 A CN114352587 A CN 114352587A CN 202111618357 A CN202111618357 A CN 202111618357A CN 114352587 A CN114352587 A CN 114352587A
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- pitch angle
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- 238000000034 method Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000446 fuel Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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Abstract
The invention discloses an intelligent heliostat hydraulic driving system.A fuel line behind an oil pump is divided into three paths, one path is connected with a first electromagnetic directional valve, two electromagnets of the first electromagnetic directional valve respectively control the oil supply of a rod cavity and a rodless cavity of a first oil cylinder for driving a heliostat to perform pitching motion, the other path is connected with a second electromagnetic directional valve, two electromagnets of the second electromagnetic directional valve respectively control the oil supply of the rod cavity and the rodless cavity of a second oil cylinder for driving the heliostat to perform first azimuth rotation motion, the other path is connected with a third electromagnetic directional valve, and two electromagnets of the third electromagnetic directional valve respectively control the oil supply of the rod cavity and the rodless cavity of a third oil cylinder for driving the heliostat to perform second azimuth rotation motion; the oil pump is controlled by the variable frequency motor to work. The invention has high driving precision and good working performance.
Description
Technical Field
The invention relates to a heliostat hydraulic drive system.
Background
In the prior art, the hydraulic driving of the heliostat has the problems of non-ideal precision, troublesome operation and the like, and needs to be further improved.
Disclosure of Invention
The invention aims to provide an intelligent heliostat hydraulic driving system which is high in driving precision and good in working performance.
The technical solution of the invention is as follows:
the utility model provides an intelligent heliostat hydraulic drive system which characterized by: the oil circuit behind the oil pump is divided into three paths, one path is connected with a third electromagnetic directional valve, two electromagnets of the third electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a first oil cylinder for driving the heliostat to perform pitching motion, the other path is connected with a first electromagnetic directional valve, two electromagnets of the first electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a second oil cylinder for driving the heliostat to perform first azimuth rotation motion, and the other path is connected with a second electromagnetic directional valve, two electromagnets of the second electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a second oil cylinder for driving the heliostat to perform second azimuth rotation motion; the oil pump is controlled by the variable frequency motor to work.
The PLC in the hydraulic drive control system is the core of a local control system, receives input signals and controls output through a control logic program. The PLC comprises a real-time clock and a solar angle vector calculation functional block; inquiring the current sun angle, the azimuth angle and the pitch angle of the heliostat every 1 minute, and intermittently controlling the output; displaying the current sun angle, the inclinometer parameters and the encoder parameters on the touch screen HMI to monitor the state of the heliostat; the frequency converter changes the rotating speed of the motor so as to change the flow of the pump and realize the fast/slow movement of the heliostat on the one hand, and controls the motor to operate intermittently on the other hand, so that the frequency converter protects the motor and a power grid and avoids high surge current; the system comprises an axial position encoder and a pitching inclinometer, wherein the axial position encoder and the pitching inclinometer are arranged on a heliostat frame and are used for feeding back the azimuth angle and the pitch angle of a heliostat;
the hydraulic system driving circuit comprises a motor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve; the motor drives the hydraulic pump to provide power for the action of the hydraulic cylinder; the telescopic motion of the hydraulic cylinder is realized by combining the actions of the 6 electromagnets of the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve, so that the rotation and the pitching action of the heliostat are realized.
The variable frequency motor is connected with the frequency converter, the frequency converter is connected with the switch, and the switch is connected to the power supply inlet wire.
The variable frequency motor is an oil-immersed motor.
The control method of the hydraulic drive control system comprises the following steps:
establishing an azimuth electromagnetic valve action table
Y1, Y2 denote first and second electromagnetic directional valves, and Y3 denotes a third electromagnetic directional valve; a represents a hydraulic cylinder extending direction electromagnet, and b represents a hydraulic cylinder retracting direction electromagnet; + represents the electromagnet is electrified, and-represents the electromagnet is deenergized; defining the range of azimuth motion to be 10-350 degrees;
the azimuth hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current sun azimuth angle, and setting a target sun azimuth angle; receiving the feedback of the azimuth angle of the current mirror bracket, and judging the azimuth area of the mirror bracket: i, II, III, IV and V; if the azimuth angle of the target sun is larger than the azimuth angle of the current mirror bracket, clockwise action is carried out; if the target sun azimuth angle is less than the current mirror bracket azimuth angle, counterclockwise action is carried out; according to the azimuth area and the action direction of the spectacle frame, an azimuth electromagnetic valve action table is checked to control the on-off of a corresponding azimuth electromagnetic iron; the electromagnet in any direction acts, the oil pump motor is driven by low frequency, oil is supplied by the oil pump at low flow, and the azimuth angle of the mirror bracket changes slowly; receiving the azimuth feedback of the current mirror bracket, and judging whether the azimuth of the current mirror bracket enters the allowable error range of the target sun azimuth; if so, the azimuth electromagnet is powered off, and the oil pump motor is stopped;
(II) action meter for establishing pitch angle electromagnetic valve
| Azimuth angle | Direction | Y3a | Y3b |
| 0 | / | - | - |
| 0→90 | Clockwise | + | - |
| 90 | / | - | - |
| 90→0 | Counter clockwise | - | + |
| 0 | / | - | - |
The pitch angle hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current solar pitch angle and setting a target solar pitch angle; receiving the pitch angle feedback of the current mirror bracket; if the target sun pitch angle is larger than the current mirror bracket pitch angle, clockwise motion is carried out; enabling the target sun pitch angle to be smaller than the current mirror bracket pitch angle, and performing anticlockwise motion; according to the action direction, checking an action table of the pitch angle electromagnetic valve to control the on-off state of the corresponding pitch electromagnetic iron; any pitch electromagnet acts to drive an oil pump motor at low frequency, the oil pump supplies oil at low flow rate, and the pitch angle of the mirror bracket changes at low speed; receiving the pitch angle feedback of the current mirror bracket, and judging whether the pitch angle of the current mirror bracket enters the allowable error range of the target sun pitch angle; if so, the pitching electromagnet is powered off, and the oil pump motor is stopped.
The invention has high driving precision and good working performance. The oil pump motor is driven by a frequency converter, so that the impact of the starting current of the motor on a power grid is reduced; the short pulse oil supply can be realized through the clearance operation of the oil pump and the motor, the sun-tracking motion function of the short pulse oil supply mode is realized, and the energy consumption of a hydraulic driving system can be reduced.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of the connection relationship between the inverter motor and the inverter.
Fig. 3 is a schematic diagram of the operating principle of the controller.
Fig. 4 is a flow chart of the azimuth cylinder control.
Fig. 5 is a control flowchart of the pitch angle hydraulic cylinder.
Detailed Description
An intelligent heliostat hydraulic drive system comprises an oil pump 1, an oil path behind the oil pump is divided into three paths, one path is connected with a third electromagnetic directional valve 2, two electromagnets of the third electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a first oil cylinder 5 driving the heliostat to perform pitching motion, the other path is connected with a first electromagnetic directional valve 3, two electromagnets of the first electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a second oil cylinder 6 driving the heliostat to perform first direction rotary motion, the other path is connected with a second electromagnetic directional valve 4, and two electromagnets of the second electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a third oil cylinder 7 driving the heliostat to perform second direction rotary motion; the oil pump is controlled by the variable frequency motor 8 to work.
The PLC in the hydraulic drive control system is the core of a local control system, receives input signals and controls output through a control logic program. The PLC comprises a real-time clock and a solar angle vector calculation functional block; inquiring the current sun angle, the azimuth angle and the pitch angle of the heliostat every 1 minute, and intermittently controlling the output; displaying the current sun angle, the inclinometer parameters and the encoder parameters on the touch screen HMI to monitor the state of the heliostat; the frequency converter changes the rotating speed of the motor so as to change the flow of the pump and realize the fast/slow movement of the heliostat on the one hand, and controls the motor to operate intermittently on the other hand, so that the frequency converter protects the motor and a power grid and avoids high surge current; the system comprises an axial position encoder and a pitching inclinometer, wherein the axial position encoder and the pitching inclinometer are arranged on a heliostat frame and are used for feeding back the azimuth angle and the pitch angle of a heliostat;
the hydraulic system driving circuit comprises a motor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve; the motor drives the hydraulic pump to provide power for the action of the hydraulic cylinder; the telescopic motion of the hydraulic cylinder is realized by combining the actions of the 6 electromagnets of the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve, so that the rotation and the pitching action of the heliostat are realized.
The variable frequency motor is connected with a frequency converter 9, the frequency converter is connected with a switch 10, and the switch is connected with a power supply inlet wire.
The variable frequency motor is an oil-immersed motor. The oil-immersed motor is adopted, so that the problem of bearing lubrication during low-speed operation of the motor and an oil pump can be effectively solved, and the device has the advantages of small volume, light weight, low cost, strong anti-corrosion capability and more convenient assembly.
The control method of the hydraulic drive control system comprises the following steps:
establishing an azimuth electromagnetic valve action table
Y1, Y2 denote first and second electromagnetic directional valves, and Y3 denotes a third electromagnetic directional valve; a represents a hydraulic cylinder extending direction electromagnet, and b represents a hydraulic cylinder retracting direction electromagnet; + represents the electromagnet is electrified, and-represents the electromagnet is deenergized; defining the range of azimuth motion to be 10-350 degrees;
the azimuth hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current sun azimuth angle, and setting a target sun azimuth angle; receiving the feedback of the azimuth angle of the current mirror bracket, and judging the azimuth area of the mirror bracket: i, II, III, IV and V; if the azimuth angle of the target sun is larger than the azimuth angle of the current mirror bracket, clockwise action is carried out; if the target sun azimuth angle is less than the current mirror bracket azimuth angle, counterclockwise action is carried out; according to the azimuth area and the action direction of the spectacle frame, an azimuth electromagnetic valve action table is checked to control the on-off of a corresponding azimuth electromagnetic iron; the electromagnet in any direction acts, the oil pump motor is driven by low frequency, oil is supplied by the oil pump at low flow, and the azimuth angle of the mirror bracket changes slowly; receiving the azimuth feedback of the current mirror bracket, and judging whether the azimuth of the current mirror bracket enters the allowable error range of the target sun azimuth; if so, the azimuth electromagnet is powered off, and the oil pump motor is stopped;
(II) action meter for establishing pitch angle electromagnetic valve
The pitch angle hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current solar pitch angle and setting a target solar pitch angle; receiving the pitch angle feedback of the current mirror bracket; if the target sun pitch angle is larger than the current mirror bracket pitch angle, clockwise motion is carried out; enabling the target sun pitch angle to be smaller than the current mirror bracket pitch angle, and performing anticlockwise motion; according to the action direction, checking an action table of the pitch angle electromagnetic valve to control the on-off state of the corresponding pitch electromagnetic iron; any pitch electromagnet acts to drive an oil pump motor at low frequency, the oil pump supplies oil at low flow rate, and the pitch angle of the mirror bracket changes at low speed; receiving the pitch angle feedback of the current mirror bracket, and judging whether the pitch angle of the current mirror bracket enters the allowable error range of the target sun pitch angle; if so, the pitching electromagnet is powered off, and the oil pump motor is stopped.
Claims (4)
1. The utility model provides an intelligent heliostat hydraulic drive system which characterized by: the oil circuit behind the oil pump is divided into three paths, one path is connected with a third electromagnetic directional valve, two electromagnets of the third electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a first oil cylinder for driving the heliostat to perform pitching motion, the other path is connected with a first electromagnetic directional valve, two electromagnets of the first electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a second oil cylinder for driving the heliostat to perform first azimuth rotation motion, and the other path is connected with a second electromagnetic directional valve, two electromagnets of the second electromagnetic directional valve respectively control oil supply of a rod cavity and a rodless cavity of a second oil cylinder for driving the heliostat to perform second azimuth rotation motion; the oil pump is controlled by a variable frequency motor to work; the hydraulic drive control system PLC calculates a solar angle according to a real-time clock and the geographical longitude and latitude, drives an internal pump and an electromagnetic directional valve of the hydraulic system to realize the control of an azimuth angle and a pitch angle of the heliostat, and realizes the movement of the heliostat along with the sun;
the PLC in the hydraulic drive control system is the core of a local control system, receives input signals and controls output through a control logic program. The PLC comprises a real-time clock and a solar angle vector calculation functional block; inquiring the current sun angle, the azimuth angle and the pitch angle of the heliostat every 1 minute, and intermittently controlling the output; displaying the current sun angle, the inclinometer parameters and the encoder parameters on the touch screen HMI to monitor the state of the heliostat; the frequency converter changes the rotating speed of the motor so as to change the flow of the pump and realize the fast/slow movement of the heliostat on the one hand, and controls the motor to operate intermittently on the other hand, so that the frequency converter protects the motor and a power grid and avoids high surge current; the system comprises an axial position encoder and a pitching inclinometer, wherein the axial position encoder and the pitching inclinometer are arranged on a heliostat frame and are used for feeding back the azimuth angle and the pitch angle of a heliostat;
the hydraulic system driving circuit comprises a motor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve; the motor drives the hydraulic pump to provide power for the action of the hydraulic cylinder; the telescopic motion of the hydraulic cylinder is realized by combining the actions of the 6 electromagnets of the first electromagnetic directional valve, the second electromagnetic directional valve and the third electromagnetic directional valve, so that the rotation and the pitching action of the heliostat are realized.
2. The intelligent heliostat hydraulic drive system of claim 1, wherein: the variable frequency motor is connected with the frequency converter, the frequency converter is connected with the switch, and the switch is connected to the power supply inlet wire.
3. The intelligent heliostat hydraulic drive system of claim 1 or 2, wherein: the variable frequency motor is an oil-immersed motor.
4. The intelligent heliostat hydraulic drive system of claim 1 or 2, wherein: the control method of the hydraulic drive control system comprises the following steps:
establishing an azimuth electromagnetic valve action table
Y1, Y2 denote first and second electromagnetic directional valves, and Y3 denotes a third electromagnetic directional valve; a represents a hydraulic cylinder extending direction electromagnet, and b represents a hydraulic cylinder retracting direction electromagnet; + represents the electromagnet is electrified, and-represents the electromagnet is deenergized; defining the range of azimuth motion to be 10-350 degrees;
the azimuth hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current sun azimuth angle, and setting a target sun azimuth angle; receiving the feedback of the azimuth angle of the current mirror bracket, and judging the azimuth area of the mirror bracket: i, II, III, IV and V; if the azimuth angle of the target sun is larger than the azimuth angle of the current mirror bracket, clockwise action is carried out; if the target sun azimuth angle is less than the current mirror bracket azimuth angle, counterclockwise action is carried out; according to the azimuth area and the action direction of the spectacle frame, an azimuth electromagnetic valve action table is checked to control the on-off of a corresponding azimuth electromagnetic iron; the electromagnet in any direction acts, the oil pump motor is driven by low frequency, oil is supplied by the oil pump at low flow, and the azimuth angle of the mirror bracket changes slowly; receiving the azimuth feedback of the current mirror bracket, and judging whether the azimuth of the current mirror bracket enters the allowable error range of the target sun azimuth; if so, the azimuth electromagnet is powered off, and the oil pump motor is stopped;
(II) action meter for establishing pitch angle electromagnetic valve
The pitch angle hydraulic cylinder control method comprises the following steps:
after the control system is started, sending out action pulses every minute; calculating a current solar pitch angle and setting a target solar pitch angle; receiving the pitch angle feedback of the current mirror bracket; if the target sun pitch angle is larger than the current mirror bracket pitch angle, clockwise motion is carried out; enabling the target sun pitch angle to be smaller than the current mirror bracket pitch angle, and performing anticlockwise motion; according to the action direction, checking an action table of the pitch angle electromagnetic valve to control the on-off state of the corresponding pitch electromagnetic iron; any pitch electromagnet acts to drive an oil pump motor at low frequency, the oil pump supplies oil at low flow rate, and the pitch angle of the mirror bracket changes at low speed; receiving the pitch angle feedback of the current mirror bracket, and judging whether the pitch angle of the current mirror bracket enters the allowable error range of the target sun pitch angle; if so, the pitching electromagnet is powered off, and the oil pump motor is stopped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618357.2A CN114352587A (en) | 2021-12-27 | 2021-12-27 | Intelligent heliostat hydraulic drive system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618357.2A CN114352587A (en) | 2021-12-27 | 2021-12-27 | Intelligent heliostat hydraulic drive system |
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2021
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Application publication date: 20220415 |