CN115163618A - Rotary driving device based on electro-hydraulic compound drive - Google Patents
Rotary driving device based on electro-hydraulic compound drive Download PDFInfo
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- CN115163618A CN115163618A CN202210164596.3A CN202210164596A CN115163618A CN 115163618 A CN115163618 A CN 115163618A CN 202210164596 A CN202210164596 A CN 202210164596A CN 115163618 A CN115163618 A CN 115163618A
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims description 19
- 230000001502 supplementing effect Effects 0.000 claims description 16
- 238000004146 energy storage Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 72
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a rotation driving device based on electro-hydraulic compound driving, which comprises an electric power generation all-in-one machine, a hydraulic pump/motor, a hydraulic loop and a rotating part, wherein the first end of a rotating shaft of the electric power generation all-in-one machine is in transmission connection with the rotating part, the second end of the rotating shaft of the electric power generation all-in-one machine is in transmission connection with the rotating shaft of the hydraulic pump/motor, the hydraulic pump/motor is provided with a first hydraulic cavity and a second hydraulic cavity, and the first hydraulic cavity and the second hydraulic cavity are both communicated with the hydraulic loop. Compared with the prior art, the invention integrates the advantages of high-precision control of the motor and high hydraulic transmission power, and realizes high control precision, strong driving capability and high power density.
Description
Technical Field
The invention relates to a driving device, in particular to a rotary driving device based on electro-hydraulic compound driving.
Background
The driving mode of the traditional mechanical equipment mainly comprises air pressure driving, motor driving and hydraulic driving, wherein the working medium of the air pressure driving is air, has the characteristics of low viscosity, small flow resistance and capability of centralized air supply, but is limited by compressibility and has weak position control precision, and the rated working pressure grade of the device adopting the air pressure driving is low, so that the pressure requirement of high-power equipment cannot be matched; the motor drive has the advantages of simple structure, simple control and high precision, but when the motor drive is applied to high-power equipment, the size of the motor in the motor drive is larger, and particularly when the motor is connected with a rotating part, the problem of limitation of a connecting space exists, external load is additionally added to the rotating part, and the bearing capacity of the rotating part is greatly influenced; the hydraulic drive has the advantages of high power density, fast dynamic response, high pressure level and strong overload capacity, and is widely applied to high-power mechanical equipment, but the hydraulic drive has the defects of high energy consumption and low control precision.
Accordingly, the present inventors have conducted intensive studies to develop the present invention.
Disclosure of Invention
The invention aims to provide a rotary driving device based on electro-hydraulic compound driving, which is high in control precision, driving capability and power density.
In order to achieve the purpose, the solution of the invention is as follows:
the utility model provides a rotary driving device based on compound drive of electricity liquid, includes electronic electricity generation all-in-one, hydraulic pump/motor, hydraulic circuit and rotating part, the first end of the pivot of electronic electricity generation all-in-one with the rotating part transmission is connected, the second end of the pivot of electronic electricity generation all-in-one is connected with the pivot transmission of hydraulic pump/motor, hydraulic pump/motor is provided with hydraulic pressure chamber one and hydraulic pressure chamber two, hydraulic pressure chamber one with hydraulic pressure chamber two all with hydraulic circuit is linked together.
The hydraulic circuit comprises a motor, a hydraulic pump, a one-way valve and a three-position four-way reversing valve, an output shaft of the motor is in transmission connection with a rotating shaft of the hydraulic pump, an oil inlet of the hydraulic pump is connected with an oil tank, an oil outlet of the hydraulic pump is connected with an oil inlet of the one-way valve, an oil inlet of the one-way valve is connected with a P oil inlet of the three-position four-way reversing valve, a T oil return port of the three-position four-way reversing valve is connected with the oil tank, and an A working port and a B working port of the three-position four-way reversing valve are respectively in one-to-one connection with a first hydraulic cavity and a second hydraulic cavity.
The hydraulic circuit further comprises two oil supplementing one-way valves and two safety valves, oil inlets of the two oil supplementing one-way valves and oil outlets of the two safety valves are connected with an oil tank, an oil outlet of one oil supplementing one-way valve and an oil inlet of the safety valve are connected to a pipeline between a working port A of the three-position four-way reversing valve and the first hydraulic cavity, and an oil outlet of the other oil supplementing one-way valve and an oil inlet of the safety valve are connected to a pipeline between a working port B of the three-position four-way reversing valve and the second hydraulic cavity.
The hydraulic circuit further comprises a third safety valve, an oil outlet of the third safety valve is connected with an oil tank, and an oil inlet of the third safety valve is connected to a pipeline between an oil inlet of the one-way valve and an oil outlet of the hydraulic pump.
The control system comprises a control handle, a complete machine controller, a first controller and a second controller, wherein the signal output end of the control handle is connected with the signal input end of the complete machine controller, and the complete machine controller is respectively in bidirectional electrical connection with the first controller and the second controller; the signal output end of the first controller is connected with the control end of the motor, the signal output end of the second controller is connected with the control end of the electric power generation all-in-one machine, and the signal output end of the whole machine controller is respectively connected with the control end of the hydraulic pump/motor and the electromagnetic end of the three-position four-way reversing valve.
The energy recovery unit comprises an energy accumulator and an electric energy storage unit, and an oil port of the energy accumulator is connected to a pipeline between an oil outlet of the one-way valve and a P oil inlet of the three-position four-way reversing valve; and the power supply ends of the electric energy storage unit are respectively connected with the power supply ends of the first controller and the second controller.
And an oil port of the energy accumulator is provided with a pressure sensor, and a sampling end of the pressure sensor is connected with a signal input end of the complete machine controller.
The electrical energy storage unit comprises a rechargeable battery.
After adopting the structure, the invention has the following beneficial effects:
1. in the process of driving the rotating part to rotate, the electric power generation all-in-one machine works in an electric motor mode, the hydraulic pump/motor works in a motor mode, and the electric power generation all-in-one machine and the hydraulic pump/motor are directly and coaxially connected, so that the electric power generation all-in-one machine and the hydraulic pump/motor drive the rotating part together; therefore, the invention integrates the advantages of high-precision control of the motor and high hydraulic transmission power, and realizes high control precision, strong driving capability and high power density.
2. In the braking process, the electric power generation all-in-one machine works in a generator mode, the hydraulic pump/motor works in a pump mode, the electric power generation all-in-one machine controls the electric power generation all-in-one machine to decelerate to generate main braking force when a load is slowly braked, and the opening area of the hydraulic pump/motor is controlled to control the discharge capacity, so that the electric recovery is mainly realized, and the hydraulic recovery is in an auxiliary recovery mode; when the load is braked quickly, the opening area of the hydraulic pump/motor is controlled to increase the displacement so as to recover the braking kinetic energy into the energy accumulator, thereby generating main braking force, meanwhile, the output power of the electric power generation all-in-one machine is smaller, and the electric power generation all-in-one machine is controlled to decelerate so as to generate a small amount of braking force, thereby realizing that hydraulic recovery is taken as a main mode and electric recovery is taken as an auxiliary recovery mode; thus, high-efficiency recovery is realized through different braking working conditions.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure:
10, an electric power generation all-in-one machine; 20-hydraulic pump/motor;
31-an electric motor; 32-a hydraulic pump;
33-a one-way valve; 34-a three-position four-way reversing valve;
361-oil supplementing one-way valve I;
362-oil supplementing one-way valve II; 371-safety valve one;
372-safety valve two; 38-safety valve three;
41-control handle; 42-complete machine controller;
43-a first controller; 44-a second controller;
51-an accumulator; 52-an electrical energy storage unit;
53-pressure sensor.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by the specific embodiment.
A linear driving device based on electro-hydraulic compound driving is shown in figure 1 and comprises an electric power generation all-in-one machine 10, a hydraulic pump/motor 20, a hydraulic circuit and a rotating part, wherein two ends of a rotating shaft of the electric power generation all-in-one machine 10 extend out to the outside; the first and second hydraulic chambers of the hydraulic pump/motor 20 are both in communication with the hydraulic circuit.
In the present invention, the load may be a conventional construction machine, such as a loader, a grapple, or an excavator; the rotating part may be the object table of the load or a connection between the load and a drive shaft thereon, such as a turntable of a swing system in an excavator.
The first end of the rotating shaft of the integrated electric-power generating machine 10 is coaxially connected with the rotating part, and the connection between the rotating part and the rotating part adopts the conventional connection structure, such as flange connection or key connection; the second end of the rotating shaft of the electric-power generation all-in-one machine 10 is coaxially connected with the rotating shaft of the hydraulic pump/motor 20, and the two ends can be connected by a coupler.
Thus, when the electric-power generating all-in-one machine 10 works in the motor mode and the hydraulic pump/motor 20 works in the motor mode, the second end of the rotating shaft of the electric-power generating all-in-one machine 10 rotates, and meanwhile, the rotating shaft of the hydraulic pump/motor 20 rotates, so that the second end of the rotating shaft of the electric-power generating all-in-one machine 10 and the rotating shaft of the hydraulic pump/motor 20 synchronously rotate in the same direction, the first end of the rotating shaft of the electric-power generating all-in-one machine 10 rotates, and further, the load rotates.
When the integrated electric power generating machine 10 operates in the generator mode and the hydraulic pump/motor 20 operates in the pump mode, the rotating direction of the first end of the rotating shaft of the integrated electric power generating machine 10 is opposite to the rotating direction of the load being rotated, and the rotating direction of the second end of the rotating shaft of the integrated electric power generating machine 10 is also opposite to the rotating direction of the load, and drives the rotating shaft of the hydraulic pump/motor 20 to rotate in the opposite direction.
The hydraulic circuit described above includes an electric motor 31, a hydraulic pump 32, a check valve 33, and a three-position, four-way selector valve 34. The specific hydraulic circuit is as follows: an output shaft of the motor 31 is connected with a rotating shaft of the hydraulic pump 32, an oil inlet of the oil pump 32 is connected with an oil tank, an oil outlet of the hydraulic pump 32 is connected with an oil inlet of the check valve 33, an oil outlet of the check valve 33 is connected with a P oil inlet of the three-position four-way reversing valve 34, a T oil return port of the three-position four-way reversing valve 34 is connected with the oil tank, and a working port A and a working port B of the three-position four-way reversing valve 34 are respectively connected with a first hydraulic cavity and a second hydraulic cavity of the hydraulic pump/motor 20 in a one-to-one correspondence mode. In this embodiment, the three-position, four-way reversing valve 34 is an existing conventional solenoid reversing valve.
Furthermore, the hydraulic circuit further comprises a first oil supplementing check valve 361, a second oil supplementing check valve 362, a first safety valve 371 and a second safety valve 372, oil inlets of the first oil supplementing check valve 361 and the second oil supplementing check valve 362 are connected with the oil tank, oil outlets of the first safety valve 371 and the second safety valve 372 are connected with the oil tank, an oil outlet of the first oil supplementing check valve 361 and an oil inlet of the first safety valve 371 are connected to a pipeline between a working port A of the three-position four-way reversing valve 34 and a hydraulic cavity I of the hydraulic pump/motor 20 respectively, and an oil outlet of the second oil supplementing check valve 362 and an oil inlet of the second safety valve 372 are connected to a pipeline between a working port B of the three-position four-way reversing valve 34 and a hydraulic cavity II of the hydraulic pump/motor 20 respectively.
Further, the hydraulic circuit further comprises a third safety valve 38, an oil outlet of the third safety valve 38 is connected with an oil tank, and an oil inlet of the third safety valve 38 is connected to a pipeline between an oil inlet of the one-way valve 33 and an oil outlet of the hydraulic pump 32.
The invention also comprises a control system, wherein the control system comprises a control handle 41, a complete machine controller 42, a first controller 43 and a second controller 44; the signal output end of the control handle 41 is electrically connected with the signal input end of the complete machine controller 42, and the complete machine controller 42 acquires the target rotating speed of the rotating part according to the input signal of the control handle 41, wherein the operation is the conventional operation of the engineering machinery, so the description is not repeated; the complete machine controller 42 is electrically connected with the first controller 43 in a bidirectional way, the signal output end of the first controller 43 is electrically connected with the control end of the motor 31, so that the complete machine controller 42 transmits a control instruction to the first controller 43 according to the target rotating speed of the rotating part, and the first controller 43 controls the rotating speed of the motor 31; the whole machine controller 42 is electrically connected with the second controller 44 in a bidirectional manner, a signal output end of the second controller 44 is electrically connected with a control end of the integrated electric power generation machine 10, the whole machine controller 42 transmits a control instruction to the second controller 44 according to a target rotating speed of a rotating part, the second controller 44 controls an electric mode and a power generation mode of the integrated electric power generation machine 10, and the rotating speed of the integrated electric power generation machine 10 in the electric mode and the rotating speed of the integrated electric power generation machine 10 in the power generation mode are controlled. In addition, the signal output end of the complete machine controller 42 is also electrically connected with the electromagnetic end of the three-position four-way reversing valve so as to control the pipeline of the hydraulic circuit; the signal output terminal of the complete machine controller 42 is also electrically connected to the control terminal of the hydraulic pump/motor 20 to control the pump mode and the motor mode of the hydraulic pump/motor 20 and to control the rotation speed thereof in the motor mode.
The invention also comprises an energy recovery unit which comprises an energy accumulator 51 and an electric energy storage unit 52, namely the invention has two energy recovery modes, namely electric recovery and hydraulic recovery; an oil port of the energy accumulator 51 is connected to a pipeline between an oil outlet of the check valve 33 and a P oil inlet of the three-position four-way reversing valve 34, and power ends of the electric energy storage unit 52 are respectively and electrically connected with power ends of the first controller 43 and the second controller 44. Preferably, a pressure sensor 53 is installed at the oil port of the accumulator 51, and a sampling end of the pressure sensor 53 is electrically connected to a signal input end of the complete machine controller 42, so as to transmit data collected by the pressure sensor 53 to the complete machine controller 42. In the present embodiment, the electrical energy storage unit 52 includes a conventional charging and discharging battery, preferably, the charging and discharging battery is a lithium battery, i.e. the charging and discharging terminal (i.e. power terminal) of the charging and discharging battery is electrically connected to the charging and discharging terminal of the overall controller 42.
The specific working process of the invention is as follows:
1. when the integrated machine is started, the integrated machine controller 42 determines the target rotating speed of the load according to the input signal of the control handle 41, and then controls the integrated electric power generation machine 10 to work in the motor mode through the second controller 44, so that the first end of the rotating shaft of the integrated electric power generation machine 10 rotates clockwise, and controls the rotating speed of the integrated electric power generation machine 10, and meanwhile, the integrated machine controller 42 controls the hydraulic pump/motor 20 to work in the motor mode, so that the rotating shaft of the hydraulic pump/motor 20 and the second end of the rotating shaft of the integrated electric power generation machine 10 rotate clockwise synchronously, so that the hydraulic pump/motor 20 outputs large torque to the integrated electric power generation machine 10, and the load is driven to rotate clockwise, and the integrated electric power generation machine is started. In the process, the complete machine controller 42 controls the rotation speed of the motor 31 through the first controller 43, at this time, the three-position four-way reversing valve 34 works at a left station, the left station means that the oil inlet P is communicated with the working port a, the working port B is communicated with the oil return port T, hydraulic oil in the oil tank flows in from the first hydraulic cavity of the hydraulic pump/motor 20, meanwhile, the complete machine controller 42 obtains pressure data transmitted by the pressure sensor 53 in real time, so that the oil port pressure of the energy accumulator 51 is maintained at a set target threshold, and when the oil port pressure of the energy accumulator 51 reaches the target threshold, the motor 31 stops working, so that the energy accumulator 51 is used as a power source, the overflow loss is reduced, and the energy efficiency utilization is improved; the target threshold value is set in the first controller 43 according to the actual accumulator 51 and the hydraulic circuit.
In the process of driving the load, the electric power generation all-in-one machine 10 works in the motor mode so as to realize normal operation speed regulation, and the hydraulic pump/motor 20 works in the motor mode so as to generate a target large torque through the displacement of the hydraulic pump/motor 20, so that the direction of the torque provided by the hydraulic pump/motor 20 is the same as that of the electric power generation all-in-one machine 10, which means that the action of the hydraulic pump/motor 20 reduces the load required to be driven by the electric power generation all-in-one machine 10, reduces the interference of the load driven by the electric power generation all-in-one machine 10, and realizes the acceleration of a rotating part to quickly reach the target rotating speed.
2. When the load reaches the target rotation speed, the complete machine controller 42 controls the rotation speed of the electric power generation all-in-one machine 10 in the motor mode through the second controller 43, and at the same time, the complete machine controller 42 controls the displacement of the hydraulic pump/motor 20, which is the minimum displacement ensuring the leakage amount of the hydraulic circuit, and at this time, the present invention uses the electric power generation all-in-one machine 10 as the main driving unit.
3. After the load reaches the target rotation speed and the weight of the load becomes heavy, the complete machine controller 42 controls the rotation speed of the integrated electric power generation machine 10, and meanwhile, the complete machine controller 42 controls the displacement of the hydraulic pump/motor 20 according to the pressure data detected by the pressure sensor 53, namely, the oil port pressure of the accumulator 51, so as to generate the target torque, and the hydraulic pump/motor 20 and the integrated electric power generation machine 20 compositely drive the load.
4. During braking, the load is braked in a slow braking mode and a fast braking mode, which are described in detail below. The judgment of the slow braking and the fast braking is performed by the overall controller 42 through the output signal of the control handle 41, and this operation is a conventional operation in the existing engineering machinery, so the description is omitted.
1. During load braking, when the control handle 51 returns to the neutral position, the slow braking is judged at this time, the braking control of the integrated electric power generation machine 10 is mainly used for controlling the integrated electric power generation machine to be in a generator mode, and the rotating speed of the integrated electric power generation machine 10 is controlled to be reduced, so that the braking force is generated, namely the torque opposite to the torque direction of the load is generated by the integrated electric power generation machine 10; and meanwhile, the hydraulic pump/motor 20 is controlled to work in a pump mode, so that the hydraulic pump/motor 20 generates a braking force in the same direction as that of the integrated electric power generation machine 10, and when the rotating speed of the integrated electric power generation machine 10 is lower than a set rotating speed threshold value, the whole machine controller 42 controls the three-position four-way reversing valve 34 to return to a neutral position, in the process, because the load still rotates before the speed reduction and stop, the energy in the rotating process of the load is converted into electric energy by the integrated electric power generation machine 10 and stored in the electric energy storage unit 52, and meanwhile, the hydraulic energy generated by the hydraulic pump/motor 20 is stored in the energy accumulator 51.
In the braking process, the integrated electric power generating and generating machine 10 operates in a generator mode, and energy recovery is performed through the electric energy storage unit 51, that is, an electric recovery mode is used as a main energy recovery mode.
2. During load braking, when the control handle 51 is pushed out in the opposite direction after returning to the neutral position, it is determined that the hydraulic pump/motor 20 is rapidly braked, the hydraulic pump/motor 20 is controlled to operate in the pump mode, the whole machine controller 42 controls the opening area of the hydraulic pump/motor 20 to increase the displacement of the hydraulic pump/motor 20, main braking force is generated, and braking kinetic energy is recovered to the energy accumulator 51, in the process, the electric power generation integrated machine 20 operates in the generator mode, and the rotating speed of the electric power generation integrated machine 10 is rapidly decelerated, at the moment, the electric power generation integrated machine 10 outputs smaller power, but the load still rotates before the rapid deceleration and stop, so a small amount of energy in the load rotation process is converted into electric energy by the electric power generation integrated machine 10.
In the above-described braking process, the main energy recovery, i.e., the hydraulic recovery mode, is performed through the accumulator 51 with the hydraulic pump/motor 20 operating in the pump mode as the main energy recovery mode.
It should be noted that the three-position four-way reversing valve 34 returns to the neutral position, which means that the P oil inlet and the A working port are cut off, and the B working port and the T oil return port are cut off.
The above-mentioned rotation speed threshold is a value set according to actual conditions and a lot of experience, and is set in the second controller 44 or the overall controller 42.
In the invention, during the counterclockwise rotation starting and braking process of the load, the three-position four-way reversing valve 34 works at the right station, the oil inlet P is communicated with the working port B, and the working port A is communicated with the oil return port T.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a rotary driving device based on compound drive of electricity liquid which characterized in that: the hydraulic power generation device comprises an electric power generation all-in-one machine, a hydraulic pump/motor, a hydraulic loop and a rotating part, wherein the first end of a rotating shaft of the electric power generation all-in-one machine is in transmission connection with the rotating part, the second end of the rotating shaft of the electric power generation all-in-one machine is in transmission connection with the rotating shaft of the hydraulic pump/motor, and a first hydraulic cavity and a second hydraulic cavity of the hydraulic pump/motor are communicated with the hydraulic loop.
2. The rotary driving device based on the electro-hydraulic compound drive as claimed in claim 1, wherein: the hydraulic circuit comprises a motor, a hydraulic pump, a one-way valve and a three-position four-way reversing valve, wherein an output shaft of the motor is in transmission connection with a rotating shaft of the hydraulic pump, an oil inlet of the hydraulic pump is connected with an oil tank, an oil outlet of the hydraulic pump is connected with an oil inlet of the one-way valve, an oil inlet of the one-way valve is connected with an oil inlet P of the three-position four-way reversing valve, an oil return port T of the three-position four-way reversing valve is connected with the oil tank, and a working port A and a working port B of the three-position four-way reversing valve are respectively connected with a first hydraulic cavity and a second hydraulic cavity in a one-to-one correspondence mode.
3. A rotary drive device based on electro-hydraulic compound drive according to claim 2, characterized in that: the hydraulic circuit further comprises two oil supplementing one-way valves and two safety valves, oil inlets of the two oil supplementing one-way valves and oil outlets of the two safety valves are connected with an oil tank, an oil outlet of one oil supplementing one-way valve and an oil inlet of the safety valve are connected to a pipeline between a working port A of the three-position four-way reversing valve and the first hydraulic cavity, and an oil outlet of the other oil supplementing one-way valve and an oil inlet of the safety valve are connected to a pipeline between a working port B of the three-position four-way reversing valve and the second hydraulic cavity.
4. A rotary drive device based on electro-hydraulic compound drive according to claim 2 or 3, characterized in that: the hydraulic circuit further comprises a third safety valve, an oil outlet of the third safety valve is connected with an oil tank, and an oil inlet of the third safety valve is connected to a pipeline between an oil inlet of the one-way valve and an oil outlet of the hydraulic pump.
5. A rotary driving device based on electro-hydraulic compound drive according to claim 4, characterized in that: the control system comprises a control handle, a complete machine controller, a first controller and a second controller, wherein the signal output end of the control handle is connected with the signal input end of the complete machine controller, and the complete machine controller is respectively in bidirectional electrical connection with the first controller and the second controller; the signal output end of the first controller is connected with the control end of the motor, the signal output end of the second controller is connected with the control end of the electric power generation all-in-one machine, and the signal output end of the whole machine controller is respectively connected with the control end of the hydraulic pump/motor and the electromagnetic end of the three-position four-way reversing valve.
6. The rotary driving device based on the electro-hydraulic compound drive as claimed in claim 5, wherein: the energy recovery unit comprises an energy accumulator and an electric energy storage unit, and an oil port of the energy accumulator is connected to a pipeline between an oil outlet of the one-way valve and a P oil inlet of the three-position four-way reversing valve; and the power supply ends of the electric energy storage unit are respectively connected with the power supply ends of the first controller and the second controller.
7. The rotary driving device based on the electro-hydraulic compound drive as claimed in claim 6, wherein: and an oil port of the energy accumulator is provided with a pressure sensor, and a sampling end of the pressure sensor is connected with a signal input end of the complete machine controller.
8. The rotary driving device based on the electro-hydraulic compound drive as claimed in claim 6, wherein: the electrical energy storage unit comprises a rechargeable battery.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210164596.3A CN115163618A (en) | 2022-02-22 | 2022-02-22 | Rotary driving device based on electro-hydraulic compound drive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210164596.3A CN115163618A (en) | 2022-02-22 | 2022-02-22 | Rotary driving device based on electro-hydraulic compound drive |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU641176A1 (en) * | 1975-06-10 | 1979-01-05 | Предприятие П/Я А-7449 | Cable drum hydraulic drive |
| CN101216052A (en) * | 2008-01-09 | 2008-07-09 | 浙江大学 | Rotating speed variable driving shield cutterhead energy-saving hydraulic control system |
| CN104358284A (en) * | 2014-10-29 | 2015-02-18 | 华侨大学 | Oil electro-hydraulic hybrid driving system for hydraulic digging machine |
| CN204266284U (en) * | 2014-10-29 | 2015-04-15 | 华侨大学 | A kind of hydraulic excavating machine oil electricity liquid hybrid drive system |
| CN104695852A (en) * | 2015-01-28 | 2015-06-10 | 太原理工大学 | Pneumatic multi-motor coal-bed drill with hybrid power device |
| WO2015117338A1 (en) * | 2014-02-10 | 2015-08-13 | 太原理工大学 | Single-hydraulic motor double-loop control system |
| CN106168288A (en) * | 2015-05-21 | 2016-11-30 | 丹佛斯动力系统有限责任两合公司 | The regulation that the load of hydraulic motor is relevant |
| CN112873986A (en) * | 2021-04-12 | 2021-06-01 | 济南二机床集团有限公司 | Hydraulic stretching pad with pre-accelerating function for press machine |
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2022
- 2022-02-22 CN CN202210164596.3A patent/CN115163618A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU641176A1 (en) * | 1975-06-10 | 1979-01-05 | Предприятие П/Я А-7449 | Cable drum hydraulic drive |
| CN101216052A (en) * | 2008-01-09 | 2008-07-09 | 浙江大学 | Rotating speed variable driving shield cutterhead energy-saving hydraulic control system |
| WO2015117338A1 (en) * | 2014-02-10 | 2015-08-13 | 太原理工大学 | Single-hydraulic motor double-loop control system |
| CN104358284A (en) * | 2014-10-29 | 2015-02-18 | 华侨大学 | Oil electro-hydraulic hybrid driving system for hydraulic digging machine |
| CN204266284U (en) * | 2014-10-29 | 2015-04-15 | 华侨大学 | A kind of hydraulic excavating machine oil electricity liquid hybrid drive system |
| CN104695852A (en) * | 2015-01-28 | 2015-06-10 | 太原理工大学 | Pneumatic multi-motor coal-bed drill with hybrid power device |
| CN106168288A (en) * | 2015-05-21 | 2016-11-30 | 丹佛斯动力系统有限责任两合公司 | The regulation that the load of hydraulic motor is relevant |
| CN112873986A (en) * | 2021-04-12 | 2021-06-01 | 济南二机床集团有限公司 | Hydraulic stretching pad with pre-accelerating function for press machine |
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