CN215830820U - Energy-saving control system of hydraulic station - Google Patents
Energy-saving control system of hydraulic station Download PDFInfo
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- CN215830820U CN215830820U CN202120565114.6U CN202120565114U CN215830820U CN 215830820 U CN215830820 U CN 215830820U CN 202120565114 U CN202120565114 U CN 202120565114U CN 215830820 U CN215830820 U CN 215830820U
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Abstract
The utility model relates to an energy-saving control system of a hydraulic station, which comprises an oil tank, a filter, a hydraulic pump, a servo motor, a reversing valve and an actuating mechanism, wherein an external servo driver is connected with the servo motor in a control mode, the servo motor is connected with the hydraulic pump in a transmission mode, the hydraulic pump is connected with the filter and the oil tank, the reversing valve and the actuating mechanism are connected to an outlet oil path of the oil tank in parallel, the control system comprises a pressure sensor, the signal input end of the pressure sensor is respectively and electrically connected with an energy storage tank and the reversing valve, the signal output end of the pressure sensor is electrically connected with the external servo driver, the signal input end of the oil pump pressure sensor is electrically connected with the hydraulic pump, and the signal output end of the pressure sensor is electrically connected with the servo driver. The utility model enables the system pressure to be stabilized within the fluctuation range of the set value, and simultaneously enables the servo motor to run at low pressure and low speed when the pressure demand is small, thereby saving the electric energy loss.
Description
Technical Field
The utility model relates to an energy-saving control system for realizing a steel hydraulic station by adopting servo system control. Belongs to the technical field of energy conservation of hydraulic stations.
Background
The current working principle of electrical control is as follows: the motor drives the oil pump to rotate, the pump pumps oil after absorbing oil from the oil pump, mechanical energy is converted into pressure energy of hydraulic oil, the hydraulic oil is subjected to direction, pressure and flow regulation by the hydraulic valve through the manifold block (or valve combination) and then is transmitted to an oil cylinder or an oil motor of the hydraulic machine through an external pipeline, so that the direction change of the hydraulic machine, the strength and the speed of the hydraulic machine are controlled, and various hydraulic machines are pushed to do work.
However, the original system has many problems: a. because of the enlargement of a hydraulic station designer to the system allowance, the capacity of the motor is much higher than the actual requirement, and the electricity-saving factor is not considered too much when a steel design institute designs the equipment scheme, so that the phenomenon of 'large horse pulls a small car' exists, and the energy consumption is wasted. b. The power frequency of the common asynchronous motor is directly started, and the stability of a power grid and the running safety of other electric equipment are greatly influenced by starting current. c. The common asynchronous motor still continuously operates when the pressure requirement is met, redundant flow flows back to the oil tank through the overflow valve, hydraulic oil continuously and circularly works for a long time, heat energy is generated, hydraulic oxidation time is accelerated, oil leakage of the whole equipment is serious, the asynchronous motor belongs to non-economic operation, and electric energy and hydraulic oil are seriously wasted. d. The noise is very big when the power frequency of the ordinary asynchronous motor runs. e. The impact of the power frequency starting equipment of the common asynchronous motor is large, and the abrasion of a motor bearing is large, so that the equipment maintenance amount is large.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide an energy-saving control system for a hydraulic station of metallurgical equipment aiming at the prior art, so that the pressure of the system is stabilized within the fluctuation range of a set value, and meanwhile, a servo motor can run at low pressure and low speed when the pressure demand is small, thereby saving the electric energy loss.
The technical scheme adopted by the utility model for solving the problems is as follows: the energy-saving control system for the hydraulic station comprises an oil tank, a filter, a hydraulic pump, a servo motor, a reversing valve and an actuating mechanism, wherein an external servo driver is in control connection with the servo motor, the servo motor is in transmission connection with the hydraulic pump, the hydraulic pump is connected with the filter and the oil tank, and the reversing valve is connected with the actuating mechanism in parallel connection on an outlet oil path of the oil tank.
Preferably, control system includes pressure sensor, pressure sensor's signal input part respectively with energy storage tank and switching-over valve electrical connection, pressure sensor's signal output part and outside servo driver electrical connection, oil pump pressure sensor's signal input part and hydraulic pump electrical connection, pressure sensor's signal output part and servo driver electrical connection, pressure sensor is used for gathering the oil pressure in the hydraulic pump to transmit the oil pressure of gathering for servo driver.
Preferably, an overflow valve is arranged at an oil path outlet of the oil tank in series.
Preferably, a check valve is arranged on an oil path between the pressure sensor and the hydraulic pump.
Preferably, the servo motor is disposed in front of the hydraulic pump.
Preferably, the pressure sensor is placed behind the one-way valve.
Compared with the prior art, the utility model has the advantages that:
(1) the technology of the utility model transfers the oil pressure signal in the energy storage tank to the servo driver by depending on the system pressure sensor, the servo driver automatically controls the servo motor to adjust the rotating speed after the pressure in the energy storage tank reaches the set value, so that the oil pressure in the energy storage tank is stabilized within the fluctuation range of the set value, and constant pressure control is carried out;
(2) according to the technology, when the loading stopping time of the oil cylinder is long, the system pressure sensor can detect that the current pressure in the energy storage tank exceeds a target set value, and the servo driver controls the servo motor to be in a low-speed running state, so that the electric energy and the energy loss are saved under the condition of ensuring the pressure requirement of the energy storage tank;
(3) the control system improves the pressure control precision of the system, the output oil quantity of the oil pump is changed along with the change of the rotating speed of the servo motor, the oil pressure output of the hydraulic station is matched with the oil pressure required by user equipment, a vector control mode is adopted, and an encoder on the servo motor can detect and feed back the rotating speed of the servo motor, so that the torque of the servo motor at low speed is ensured, the rotating speed of the servo motor is stable under the condition of load change, and the dynamic and static performances of the servo motor are fully ensured;
(4) compared with an asynchronous motor, the synchronous servo motor has the advantages of obviously improved working efficiency, stable operation and low noise.
Drawings
FIG. 1 is a schematic structural diagram of an energy-saving control system of a hydraulic station of the present invention;
fig. 2 is a flow output working state curve diagram after energy saving modification in the embodiment of the utility model.
Wherein:
the device comprises an oil tank 1, a filter 2, a hydraulic pump 3, a servo motor 4, an overflow valve 5, a one-way valve 6, a pressure sensor 7, a reversing valve 8 and an actuating mechanism 9.
Detailed Description
The present invention will be described in further detail with reference to examples.
Referring to the attached drawing 1, in the energy-saving control system for the hydraulic station according to the embodiment, an external servo driver is connected with a servo motor 4 in a control mode, the servo motor 4 is connected with a hydraulic pump 3 in a transmission mode, the hydraulic pump 3 is connected with a filter 2 and an oil tank 1, an overflow valve 5 is connected in series at an oil path outlet of the oil tank 1, and a reversing valve 8 is connected in parallel with an oil path outlet of the oil tank 1 and is connected with an actuating mechanism oil cylinder 9. A check valve 6 is arranged on an oil path between the system pressure sensor 7 and the hydraulic pump 3.
The signal input end of the system pressure sensor 7 is electrically connected with the energy storage tank and the reversing valve 8 respectively, the signal output end of the system pressure sensor 7 is electrically connected with the servo driver 10, and the system pressure sensor 7 is used for collecting oil pressure in the energy storage tank and the actuating mechanism oil cylinder 9 and transmitting the collected oil pressure to the servo driver 10.
The signal input part of the oil pump pressure sensor 7 is electrically connected with the hydraulic pump 3, the signal output part of the oil pump pressure sensor 7 is electrically connected with the servo driver 10, and the oil pump pressure sensor 7 is used for collecting oil pressure in the hydraulic pump 3 and transmitting the collected oil pressure to the servo driver 10.
The outlet oil path of the actuator cylinder 9 is provided with a directional valve 8, and the directional valve 8 is used for controlling the flowing direction of the liquid flow.
When the energy-saving control system of the steel hydraulic station is operated and controlled, the system pressure sensor 7 is used for monitoring the oil pressure in the energy storage tank and the actuating mechanism oil cylinder 9 and transmitting the oil pressure signal to the servo driver 10, the servo driver 10 carries out comparison operation on the oil pressure signal and adjusts the rotating speed of the servo motor 4 in real time, and therefore the oil pressure in the energy storage tank and the actuating mechanism oil cylinder 9 is stabilized within a set range. The oil pump pressure sensor 7 is used for monitoring the oil pressure output from the hydraulic pump 3 and transmitting the oil pressure to the servo driver 10, after the control system is stabilized, the oil pressure signal monitored by the oil pump pressure sensor 7 is consistent with the system pressure signal, if the oil pressure signal is inconsistent with the system pressure signal, the servo driver 10 controls the rotating speed of the servo motor 4, and the oil pressure in the control system is stabilized.
The energy-saving theoretical calculation scheme of the hydraulic station is as follows: as shown in fig. 2, assuming that the total flow sum required by all the workstations working simultaneously is Q, wherein the Q1 state is the working flow output state (dotted line) of the asynchronous motor in the original scheme, and the flow output working state curve after energy saving modification is as the graph curve (the rotating speed is very low and the flow output is neglected when the low-pressure low-flow is adopted, the normal working rotating speed of the motor is 1500r/m, the rotating speed of the motor can be as low as more than ten revolutions when the low-pressure low-flow is adopted, and the flow output is neglected less than one percent.)
The energy saving rate is calculated as follows
The energy saving rate is the time ratio, i.e. the flow ratio, i.e. T2/(T1+ T2) × 100% (i.e. the ratio of the load non-operating time to the whole operating cycle in a whole operating cycle).
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a hydraulic pressure station energy-saving control system, its characterized in that the device includes oil tank (1), filter (2), hydraulic pump (3), servo motor (4), switching-over valve (8) and actuating mechanism (9), and servo motor (4) are connected in outside servo driver control, hydraulic pump (3) are connected in servo motor (4) transmission, hydraulic pump (3) are connected with filter (2) and oil tank (1), the export oil path of oil tank (1) is gone up to have parallelly connected switching-over valve (8) and actuating mechanism (9) to connect.
2. The energy-saving control system of the hydraulic station as claimed in claim 1, characterized in that the control system comprises a pressure sensor (7), the signal input end of the pressure sensor (7) is electrically connected with the energy storage tank and the reversing valve (8), the signal output end of the pressure sensor (7) is electrically connected with an external servo driver, the signal input end of the oil pump pressure sensor (7) is electrically connected with the hydraulic pump (3), the signal output end of the pressure sensor (7) is electrically connected with the servo driver, and the pressure sensor (7) is used for collecting oil pressure in the hydraulic pump (3) and transmitting the collected oil pressure to the servo driver.
3. The energy-saving control system of the hydraulic station as claimed in claim 1, characterized in that an overflow valve (5) is connected in series at an oil path outlet of the oil tank (1).
4. The energy-saving control system of the hydraulic station as claimed in claim 1, characterized in that a check valve (6) is arranged on an oil path between the pressure sensor (7) and the hydraulic pump (3).
5. A hydraulic station energy-saving control system according to claim 1, characterized in that the servo motor (4) is placed in front of the hydraulic pump (3).
6. A hydraulic station energy-saving control system according to claim 2, characterized in that the pressure sensor (7) is placed behind the non-return valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120565114.6U CN215830820U (en) | 2021-03-19 | 2021-03-19 | Energy-saving control system of hydraulic station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120565114.6U CN215830820U (en) | 2021-03-19 | 2021-03-19 | Energy-saving control system of hydraulic station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215830820U true CN215830820U (en) | 2022-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120565114.6U Active CN215830820U (en) | 2021-03-19 | 2021-03-19 | Energy-saving control system of hydraulic station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215830820U (en) |
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2021
- 2021-03-19 CN CN202120565114.6U patent/CN215830820U/en active Active
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