CN110056549B - Automatic control lifting hydraulic cylinder potential energy recovery system and method - Google Patents
Automatic control lifting hydraulic cylinder potential energy recovery system and method Download PDFInfo
- Publication number
- CN110056549B CN110056549B CN201910266600.5A CN201910266600A CN110056549B CN 110056549 B CN110056549 B CN 110056549B CN 201910266600 A CN201910266600 A CN 201910266600A CN 110056549 B CN110056549 B CN 110056549B
- Authority
- CN
- China
- Prior art keywords
- reversing valve
- way reversing
- oil
- valve
- oil port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- 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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- 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
- F15B21/087—Control strategy, e.g. with block diagram
-
- 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
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
Abstract
The invention discloses an automatic control potential energy recovery system and method for a lifting hydraulic cylinder, which comprises a variable pump, an overflow valve, a three-position four-way reversing valve, the lifting hydraulic cylinder and other components, wherein the three-position four-way reversing valve is connected with the variable pump and an upper cavity of the hydraulic cylinder, a lower cavity of the hydraulic cylinder is respectively connected with a first two-position three-way reversing valve and a three-position four-way reversing valve, the first two-position three-way reversing valve is connected with an oil tank and a variable motor, the variable motor is connected with a water pump, the input end of the water pump is connected with a low-position water tank, the output end of the water pump is connected with a second two-position three-way reversing valve, the second two-position three-way reversing valve is connected with a high-position water tank and a cooler, a temperature sensor is connected. The hydraulic lifting system can recover potential energy when the lifting hydraulic cylinder descends, can convert the recovered potential energy into potential energy of water, can also be used for cooling of a hydraulic system, and improves the energy utilization rate.
Description
Technical Field
The invention relates to the field of heavy machinery, in particular to an automatic control system and method for recovering potential energy of a lifting hydraulic cylinder.
Background
Heavy machinery plays an important role in production activities of national economy, a lifting hydraulic cylinder in the heavy machinery and a heavy object lifted by the lifting hydraulic cylinder have a large amount of gravitational potential energy, and in the descending process of the hydraulic cylinder, the large amount of gravitational potential energy is converted into heat energy through the throttling effect of a hydraulic valve and is dissipated in vain, so that the production cost of enterprises is improved, and huge energy waste is caused. If the energy is recycled by some means, the method has important significance for reducing the production cost and saving energy and protecting environment for enterprises.
The lifting hydraulic cylinder performs regular reciprocating lifting movement, and potential energy is recovered when the lifting hydraulic cylinder descends, usually, a hydraulic motor is arranged on an oil return path and connected with a generator to generate electricity, and then the electricity is conveyed to a storage battery through a rectifier to be stored, however, the energy conversion frequency is large in the process, the energy recovery efficiency is low, and the cost of a large-capacity electricity storage device is high.
Disclosure of Invention
Aiming at the situation, the invention provides an automatic control potential energy recovery system for a lifting hydraulic cylinder, which overcomes the defects of the prior art, and can effectively dissipate the heat of hydraulic oil and convert most energy into the potential energy of water by connecting a hydraulic backflow system and a water pump lifting system in parallel with a working loop of the lifting hydraulic cylinder, thereby being used for the production of an industrial production line and saving the cost.
The technical scheme adopted by the invention is to provide an automatic control potential energy recovery system for a lifting hydraulic cylinder, which comprises a hydraulic oil tank, a variable pump, an overflow valve, a three-position four-way reversing valve, a one-way valve, the lifting hydraulic cylinder, a first two-position three-way reversing valve, a speed regulating valve, a variable motor, a water pump, a low-position water tank, a cooler, a second two-position three-way reversing valve, a high-position water tank, a liquid level sensor, a temperature sensor, a controller and a motor, wherein a first oil port of the variable pump is communicated with hydraulic oil in the hydraulic oil tank, a rotating shaft of the variable pump is connected with the motor, a second oil port of the variable pump is connected with a second oil port of the three-position four-way reversing valve, the overflow valve is connected with the variable pump in parallel, a control oil path of the overflow valve is connected with an oil pipe between the variable pump and the three-position four-way reversing valve, a third oil port of, the second oil port of the check valve is connected with the first oil port of the lifting hydraulic cylinder, the check valve is communicated from the first oil port to the second oil port in a one-way mode, the fourth oil port of the three-position four-way reversing valve is connected with the second oil port of the lifting hydraulic cylinder, the first oil port of the three-position four-way reversing valve is closed, and a piston rod of the lifting hydraulic cylinder is connected with a load.
The first oil port of the variable motor is connected with the second oil port of the cooler, the first oil port of the cooler is communicated with hydraulic oil in the hydraulic oil tank, the second oil port of the variable motor is connected with the first oil port of the first two-position three-way reversing valve, the second oil port of the speed regulating valve is connected with the second oil port of the first two-position three-way reversing valve, the first oil port of the speed regulating valve is connected with an oil pipe between the variable motor and the cooler, the third oil port of the first two-position three-way reversing valve is connected with the oil pipe between the one-way valve and the lifting hydraulic cylinder, the output shaft of the variable motor is connected with the rotating shaft of the water pump, the first interface of the water pump is connected with the low-position water tank, the second interface of the water pump is connected with the third interface of the second two-position three-way reversing valve, and the first cooling water interface of the cooler is communicated with cooling water, a second cooling water interface is connected with a second interface of the second two-position three-way reversing valve, and a first interface of the second two-position three-way reversing valve is communicated with the cooling water of the high-level water tank; and the liquid level sensor detects the water level height of the high-level water tank and feeds back a detection signal to the controller, the temperature sensor detects the temperature of hydraulic oil in the hydraulic oil tank and feeds back the detection signal to the controller, and the first two-position three-way reversing valve and the second two-position three-way reversing valve are communicated with the controller.
Preferably, the controller adopts a logic control unit PLC.
Preferably, when the lifting hydraulic cylinder ascends, the three-position four-way reversing valve is in the left position.
Furthermore, the first two-position three-way reversing valve and the second two-position three-way reversing valve are electromagnetic reversing valves.
Preferably, the variable pump is a unidirectional variable pump and the variable motor is a unidirectional variable motor.
Preferably, all the pipelines through which the hydraulic oil passes adopt steel wire high-pressure pipes.
Preferably, a method of providing an automatically controlled hydraulic lift cylinder potential energy recovery system, comprising the steps of:
s1: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is located at the right side, when the temperature sensor detects that the temperature of oil liquid exceeds the preset upper temperature limit value, the controller controls the first two-position three-way reversing valve to be located at the right position, the second two-position three-way reversing valve is located at the left position, the variable motor drives the water pump to work at the moment, the water pump pumps water into the cooler to cool the oil liquid, and the recovered energy is used for driving the water pump to cool the hydraulic system;
s2: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is positioned at the right side, when the temperature sensor detects that the temperature of oil is within a preset temperature range and the liquid level sensor detects that the liquid level does not reach a preset upper limit value of the liquid level, the controller controls the first two-position three-way reversing valve to be positioned at the right position and the second two-position three-way reversing valve to be positioned at the right position, at the moment, the variable motor drives the water pump to work, water is pumped into the high-position water tank, and potential energy recovered when the lifting hydraulic cylinder descends is converted into potential energy of water;
s3: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is located at the right side, when the temperature sensor detects that the temperature of oil is within a preset temperature range, and the liquid level sensor detects that the liquid level reaches a preset upper limit value of the liquid level, the controller controls the first two-position three-way reversing valve to be located at the left position, at the moment, the variable motor and the water pump device do not work, the potential energy of the lifting hydraulic cylinder cannot be recovered, and the oil flows back to the hydraulic oil tank through the speed regulating valve.
Compared with the prior art, the invention has the following advantages:
1. the potential energy recovery system of the lifting hydraulic cylinder can realize automatic switching between a common mode and an energy-saving mode, in the energy-saving mode, the recovered potential energy can be converted into the potential energy of water in a high-level water tank and can be used as a factory water supply source, and water pumped by a water pump can be used for cooling the hydraulic system, so that the multipurpose of energy recovery is realized;
2. the recovered potential energy is directly used for cooling a hydraulic system and supplying water to a plant area, and compared with the traditional method that a variable motor drives a generator, the generator is connected with a rectifier, and finally electric energy is stored in a high-capacity battery, the method has the advantages of less intermediate conversion times and high energy recovery efficiency;
3. the system has the advantages of low cost of the components such as the variable motor, the high-level water tank, the temperature sensor, the liquid level sensor, the controller and the like, strong environment adaptability and higher reliability;
4. in the descending process of the hydraulic cylinder, the detection control unit preferentially judges whether the hydraulic system needs cooling or not, then judges whether the high-level water tank needs water injection or not, and when the two functions do not need a water source, the system is automatically switched to a common mode, so that the process of manual intervention is reduced.
Drawings
FIG. 1 is a schematic diagram of an automatically controlled hydraulic lift cylinder potential energy recovery system of the present invention; and
FIG. 2 is a flow chart of a control strategy of the present invention.
The main reference numerals of the invention are as follows:
1. a hydraulic oil tank; 2. a variable displacement pump; 3. an overflow valve; 4. a three-position four-way reversing valve; 5. a one-way valve; 6. a lifting hydraulic cylinder; 7. a load; 8. a first two-position three-way reversing valve; 9. a speed regulating valve; 10. a variable displacement motor; 11. a water pump; 12. a low level water tank; 13. a cooler; 14. a second two-position three-way directional valve; 15. a high-level water tank; 16. a liquid level sensor; 17. a temperature sensor; 18. a controller; 19. an electric motor.
Detailed Description
The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.
The invention provides an automatic control potential energy recovery system of a lifting hydraulic cylinder, which comprises a hydraulic oil tank 1, a variable pump 2, an overflow valve 3, a three-position four-way reversing valve 4, a one-way valve 5, a lifting hydraulic cylinder 6, a first two-position three-way reversing valve 8, a speed regulating valve 9, a variable motor 10, a water pump 11, a low-position water tank 12, a cooler 13, a second two-position three-way reversing valve 14, a high-position water tank 15, a liquid level sensor 16, a temperature sensor 17, a controller 18 and an electric motor 19, wherein a first oil port of the variable pump 2 is communicated with hydraulic oil in the hydraulic oil tank 1, a rotating shaft of the variable pump 2 is connected with the electric motor 19, a second oil port of the variable pump 2 is connected with a second oil port of the four-way three-position reversing valve 4, the overflow valve 3 is connected with the variable pump 2 in parallel, a control oil path of the overflow valve 3 is connected with an oil pipe between the variable pump 2 and the three-position four-way reversing valve 4, the second oil port of the check valve 5 is connected with the first oil port of the lifting hydraulic cylinder 6, the check valve 5 is communicated from the first oil port to the second oil port in a one-way mode, the fourth oil port of the three-position four-way reversing valve 4 is connected with the second oil port of the lifting hydraulic cylinder 6, the first oil port of the three-position four-way reversing valve 4 is closed, and the piston rod of the lifting hydraulic cylinder 6 is connected with the load 7.
A first oil port of a variable motor 10 is connected with a second oil port of a cooler 13, the first oil port of the cooler 13 is communicated with hydraulic oil in a hydraulic oil tank 1, a second oil port of the variable motor 10 is connected with a first oil port of a first two-position three-way reversing valve 8, a second oil port of a speed regulating valve 9 is connected with a second oil port of the first two-position three-way reversing valve 8, the first oil port of the speed regulating valve 9 is connected with an oil pipe between the variable motor 10 and the cooler 13, a third oil port of the first two-position three-way reversing valve 8 is connected with an oil pipe between a one-way valve 5 and a lifting hydraulic cylinder 6, an output shaft of the variable motor 10 is connected with a rotating shaft of a water pump 11, a first interface of the water pump 11 is connected with a low-position water tank 12, a second interface is connected with a third interface of a second two-position three-way reversing valve 14, a first cooling water interface of the cooler 13 is communicated with cooling water of the low-position water tank 12, and, a first connector of the second two-position three-way reversing valve 14 is communicated with cooling water of the high-level water tank 15; and the liquid level sensor 16 detects the water level height of the high-level water tank 15 and feeds back a detection signal to the controller 18, the temperature sensor 17 detects the temperature of the hydraulic oil in the hydraulic oil tank 1 and feeds back a detection signal to the controller 18, and the first two-position three-way reversing valve 8 and the second two-position three-way reversing valve 14 are both communicated with the controller 18.
The controller 18 adopts a logic control unit PLC; when the lifting hydraulic cylinder 6 is lifted, the three-position four-way reversing valve 4 is in the left position; the first two-position three-way reversing valve 8 and the second two-position three-way reversing valve 14 are both electromagnetic reversing valves; the variable pump 2 is a unidirectional variable pump, and the variable motor 10 is a unidirectional variable motor; and the pipelines through which the hydraulic oil passes all adopt steel wire high-pressure pipes.
As shown in fig. 1 and 2, the method of the automatically controlled potential energy recovery system of the lifting hydraulic cylinder comprises the following steps:
s1: when the lifting hydraulic cylinder 6 descends, the three-position four-way reversing valve 4 is positioned at the right side, when the temperature sensor 17 detects that the temperature of oil liquid exceeds the preset upper temperature limit value, the controller 18 controls the first two-position three-way reversing valve 8 to be positioned at the right position, the second two-position three-way reversing valve 14 is positioned at the left position, the variable motor 10 drives the water pump 11 to work at the moment, the water pump 11 pumps water into the cooler 13 to cool the oil liquid, namely the recovered energy is utilized to drive the water pump 11 to cool the hydraulic system;
s2: when the lifting hydraulic cylinder 6 descends, the three-position four-way reversing valve 4 is positioned at the right side, when the temperature sensor 17 detects that the temperature of oil is within a preset temperature range and the liquid level sensor 16 detects that the liquid level does not reach a preset upper limit value of the liquid level, the controller 18 controls the first two-position three-way reversing valve 8 to be positioned at the right position and the second two-position three-way reversing valve 14 to be positioned at the right position, at the moment, the variable motor 10 drives the water pump 11 to work, water is pumped into the high-position water tank 15, and potential energy recovered when the lifting hydraulic cylinder 6 descends is converted into potential energy of the;
s3: when the lifting hydraulic cylinder 6 descends, the three-position four-way reversing valve 4 is located at the right side, when the temperature sensor 17 detects that the temperature of oil is within a preset temperature range, and the liquid level sensor 16 detects that the liquid level reaches a preset upper limit value of the liquid level, the controller 18 controls the first two-position three-way reversing valve 8 to be located at the left position, at the moment, the variable motor 10 and the water pump 11 do not work, the potential energy of the lifting hydraulic cylinder 6 cannot be recovered, and the oil flows back to the hydraulic oil tank 1 through the speed regulating valve 9.
The optional specific implementation process of the invention is as follows:
the oil inlet of the variable pump 2 is communicated with the hydraulic oil in the hydraulic oil tank 1 by an oil pipe, the operation of the part can be finally carried out, the rotating shaft of the variable pump 2 is connected with the motor 19 by a coupler, the oil outlet of the variable pump 2 is connected with the second oil port of the three-position four-way reversing valve 4, the overflow valve 3 is connected with the variable pump 2 in parallel, and the control oil path of the overflow valve 3 is connected with the oil pipe between the variable pump 2 and the three-position four-way reversing valve 4, the third oil port of the three-position four-way reversing valve 4 is connected with the first oil port of the check valve 5, the second oil port of the check valve 5 is connected with the rodless cavity oil port of the lifting hydraulic cylinder 6, the check valve 5 is communicated in a single direction from the first oil port to the second oil port of the check valve 5, the fourth oil port of the three-position four-way reversing valve 4 is connected with the oil port of the rod cavity of the lifting hydraulic cylinder 6, and a first oil port of the three-position four-way reversing valve 4 is closed, and a piston rod of the lifting hydraulic cylinder 6 is connected with a load 7.
An oil outlet of a variable motor 10 is connected with a second oil port of a cooler 13, a first oil port of the cooler 13 is communicated with hydraulic oil in a hydraulic oil tank 1, an oil inlet of the variable motor 10 is connected with a first oil port of a first two-position three-way reversing valve 8, one oil port of a speed regulating valve 9 is connected with a second oil port of a first two-position three-way reversing valve 8, the other oil port of the speed regulating valve 9 is connected with an oil pipe between the variable motor 10 and the cooler 13, a third oil port of the first two-position three-way reversing valve 8 is connected with an oil pipe between a one-way valve 5 and a lifting hydraulic cylinder 6, an output shaft of the variable motor 10 is connected with a rotating shaft of a water pump 11, a first interface of the water pump 11 is connected with a low-position water tank 12, a second interface of the water pump 11 is connected with a third interface of a second two-position three-way reversing valve 14, a first cooling water interface of the cooler 13 is communicated with cooling water of the, a first connector of the second two-position three-way reversing valve 14 is communicated with cooling water of the high-level water tank 15; and the liquid level sensor 16 detects the water level height of the high-level water tank 15 and feeds back a detection signal to the controller 18, the temperature sensor 17 detects the temperature of the hydraulic oil in the hydraulic oil tank 1 and feeds back a detection signal to the controller 18, and the first two-position three-way reversing valve 8 and the second two-position three-way reversing valve 14 are both communicated with the controller 18. After the whole system is assembled, the whole system can be put into a control cabinet.
In the descending process of the lifting hydraulic cylinder 6, the controller 18 obtains control signals through the temperature sensor 17 and the liquid level sensor 16, and the automatic switching of three working modes is realized by controlling the reversing valve to reverse, which is as follows:
1) energy efficient operation-system cooling mode
When the lifting hydraulic cylinder 6 descends, the three-position four-way reversing valve 4 is located at the right side, when the temperature sensor 17 detects that the temperature of oil exceeds the preset upper temperature limit value, the controller 18 controls the first two-position three-way reversing valve 8 to be located at the right position, the second two-position three-way reversing valve 14 is located at the left position, the variable motor 10 drives the water pump 11 to work at the moment, the water pump 11 pumps water into the cooler 13, the oil is cooled, and the recovered energy is utilized to drive the water pump 11 to cool the hydraulic system.
2) Energy-saving working-potential energy storage mode
When the hydraulic lifting cylinder 6 descends, the three-position four-way reversing valve 4 is located at the right side, the temperature sensor 17 detects that the temperature of oil is in the temperature range set in advance, and the liquid level sensor 16 detects that the liquid level does not reach the upper limit value of the liquid level set in advance, the controller 18 controls the first two-position three-way reversing valve 8 to be located at the right position, the second two-position three-way reversing valve 14 is located at the right position, the variable motor 10 drives the water pump 11 to work at the moment, water is pumped into the high-position water tank 15, and the potential energy recovered when the hydraulic lifting cylinder 6 descends is converted into the.
3) Normal mode of operation
When the lifting hydraulic cylinder 6 descends, the three-position four-way reversing valve 4 is located at the right side, when the temperature sensor 17 detects that the temperature of oil is within a preset temperature range, and the liquid level sensor 16 detects that the liquid level reaches a preset upper limit value of the liquid level, the controller 18 controls the first two-position three-way reversing valve 8 to be located at the left position, at the moment, the variable motor-water pump device does not work, the potential energy of the lifting hydraulic cylinder cannot be recovered, and the oil flows back to the hydraulic oil tank 1 through the speed regulating valve 9.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the invention, it should be understood that various modifications and adaptations can be made by those skilled in the art without departing from the principles of the present application and should be considered as within the scope of the present application.
Claims (7)
1. An automatically controlled potential energy recovery system of a lifting hydraulic cylinder is characterized by comprising a hydraulic oil tank, a variable pump, an overflow valve, a three-position four-way reversing valve, a one-way valve, the lifting hydraulic cylinder, a first two-position three-way reversing valve, a speed regulating valve, a variable motor, a water pump, a low-level water tank, a cooler, a second two-position three-way reversing valve, a high-level water tank, a liquid level sensor, a temperature sensor, a controller and a motor,
a first oil port of the variable pump is communicated with hydraulic oil in the hydraulic oil tank, a rotating shaft of the variable pump is connected with the motor, a second oil port of the variable pump is connected with a second oil port of the three-position four-way reversing valve, the overflow valve is connected with the variable pump in parallel, a control oil circuit of the overflow valve is connected with an oil pipe between the variable pump and the three-position four-way reversing valve, a third oil port of the three-position four-way reversing valve is connected with the first oil port of the one-way valve, a second oil port of the one-way valve is connected with the first oil port of the lifting hydraulic cylinder, the one-way valve is in one-way conduction from the first oil port to the second oil port, a fourth oil port of the three-position four-way reversing valve is connected with the second oil port of the lifting hydraulic cylinder, the first oil port of the three-position four-way reversing valve is closed;
the first oil port of the variable motor is connected with the second oil port of the cooler, the first oil port of the cooler is communicated with hydraulic oil in the hydraulic oil tank, the second oil port of the variable motor is connected with the first oil port of the first two-position three-way reversing valve, the second oil port of the speed regulating valve is connected with the second oil port of the first two-position three-way reversing valve, the first oil port of the speed regulating valve is connected with an oil pipe between the variable motor and the cooler, the third oil port of the first two-position three-way reversing valve is connected with the oil pipe between the one-way valve and the lifting hydraulic cylinder, the output shaft of the variable motor is connected with the rotating shaft of the water pump, the first interface of the water pump is connected with the low-position water tank, the second interface of the water pump is connected with the third interface of the second two-position three-way reversing valve, and the first cooling water interface of the cooler is communicated with cooling water, a second cooling water interface is connected with a second interface of the second two-position three-way reversing valve, and a first interface of the second two-position three-way reversing valve is communicated with the cooling water of the high-level water tank; and
the liquid level sensor detects the water level height of the high-level water tank and feeds back a detection signal to the controller, the temperature sensor detects the temperature of hydraulic oil in the hydraulic oil tank and feeds back the detection signal to the controller, and the first two-position three-way reversing valve and the second two-position three-way reversing valve are communicated with the controller.
2. The automatically controlled hydraulic lift cylinder potential energy recovery system of claim 1 wherein said controller employs a logic control unit PLC.
3. The automatically controlled hydraulic lift cylinder potential energy recovery system of claim 1 wherein the three-position, four-way reversing valve is in the left position when the hydraulic lift cylinder is raised.
4. The automatically controlled hydraulic lift cylinder potential energy recovery system of claim 1 wherein the first two-position three-way directional valve and the second two-position three-way directional valve are both solenoid directional valves.
5. The automatically controlled hydraulic lift cylinder potential energy recovery system of claim 1 wherein the variable displacement pump is a single direction variable displacement pump and the variable displacement motor is a single direction variable displacement motor.
6. The automatic control lifting hydraulic cylinder potential energy recovery system of claim 5, characterized in that all hydraulic oil passing pipelines are steel wire high-pressure pipes.
7. A method of using the automatically controlled hydraulic lift cylinder potential energy recovery system provided in any one of claims 1 to 6, comprising the steps of:
s1: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is located at the right side, when the temperature sensor detects that the temperature of oil liquid exceeds the preset upper temperature limit value, the controller controls the first two-position three-way reversing valve to be located at the right position, the second two-position three-way reversing valve is located at the left position, the variable motor drives the water pump to work at the moment, the water pump pumps water into the cooler to cool the oil liquid, and the recovered energy is used for driving the water pump to cool the hydraulic system;
s2: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is positioned at the right side, when the temperature sensor detects that the temperature of oil is within a preset temperature range and the liquid level sensor detects that the liquid level does not reach a preset upper limit value of the liquid level, the controller controls the first two-position three-way reversing valve to be positioned at the right position and the second two-position three-way reversing valve to be positioned at the right position, at the moment, the variable motor drives the water pump to work, water is pumped into the high-position water tank, and potential energy recovered when the lifting hydraulic cylinder descends is converted into potential energy of water;
s3: when the lifting hydraulic cylinder descends, the three-position four-way reversing valve is located at the right side, when the temperature sensor detects that the temperature of oil is within a preset temperature range, and the liquid level sensor detects that the liquid level reaches a preset upper limit value of the liquid level, the controller controls the first two-position three-way reversing valve to be located at the left position, at the moment, the variable motor and the water pump device do not work, the potential energy of the lifting hydraulic cylinder cannot be recovered, and the oil flows back to the hydraulic oil tank through the speed regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266600.5A CN110056549B (en) | 2019-04-03 | 2019-04-03 | Automatic control lifting hydraulic cylinder potential energy recovery system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266600.5A CN110056549B (en) | 2019-04-03 | 2019-04-03 | Automatic control lifting hydraulic cylinder potential energy recovery system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110056549A CN110056549A (en) | 2019-07-26 |
| CN110056549B true CN110056549B (en) | 2020-03-13 |
Family
ID=67318254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910266600.5A Active CN110056549B (en) | 2019-04-03 | 2019-04-03 | Automatic control lifting hydraulic cylinder potential energy recovery system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110056549B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645233B (en) * | 2019-09-26 | 2021-10-01 | 台州市晶钻智能科技有限公司 | Hydraulic pressure station that radiating effect is good convenient to remove |
| CN112922929B (en) * | 2019-12-05 | 2023-04-11 | 上海智远慧智能技术股份有限公司 | AGV hydraulic jacking device and heating control method based on system overflow |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112212A (en) * | 1997-06-13 | 1999-01-06 | Tokimec Inc | Lift driving device for heavy object |
| CN204371839U (en) * | 2014-12-26 | 2015-06-03 | 郑州宇通重工有限公司 | A kind of energy-saving hydraulic oil independent heat dissipation device |
| CN104747544A (en) * | 2015-02-04 | 2015-07-01 | 同济大学 | Engineering machinery movable arm potential energy variable amplitude energy recovery device |
| CN104763696A (en) * | 2015-04-16 | 2015-07-08 | 上海市闸北区物流工程技术研究所 | Electronic control hydraulic driving system used for industrial vehicles |
| CN105443513A (en) * | 2015-12-29 | 2016-03-30 | 太原理工大学 | Engineering operation machine |
| RO131232A2 (en) * | 2014-11-14 | 2016-06-30 | Hydramold S.R.L. | Energetically-efficient hydraulic unit for oil pumping unit |
| CN106545534A (en) * | 2016-01-21 | 2017-03-29 | 徐工集团工程机械股份有限公司 | Potential energy recycle and reuse system and rotary drilling rig |
| CN108612687A (en) * | 2018-06-13 | 2018-10-02 | 柳州北斗星液压科技有限公司 | Hydraulic loaded for cterpillar drive tests system |
| CN108799258A (en) * | 2018-07-05 | 2018-11-13 | 方碧水 | A kind of swing arm energy-recuperation system |
-
2019
- 2019-04-03 CN CN201910266600.5A patent/CN110056549B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112212A (en) * | 1997-06-13 | 1999-01-06 | Tokimec Inc | Lift driving device for heavy object |
| RO131232A2 (en) * | 2014-11-14 | 2016-06-30 | Hydramold S.R.L. | Energetically-efficient hydraulic unit for oil pumping unit |
| CN204371839U (en) * | 2014-12-26 | 2015-06-03 | 郑州宇通重工有限公司 | A kind of energy-saving hydraulic oil independent heat dissipation device |
| CN104747544A (en) * | 2015-02-04 | 2015-07-01 | 同济大学 | Engineering machinery movable arm potential energy variable amplitude energy recovery device |
| CN104763696A (en) * | 2015-04-16 | 2015-07-08 | 上海市闸北区物流工程技术研究所 | Electronic control hydraulic driving system used for industrial vehicles |
| CN105443513A (en) * | 2015-12-29 | 2016-03-30 | 太原理工大学 | Engineering operation machine |
| CN106545534A (en) * | 2016-01-21 | 2017-03-29 | 徐工集团工程机械股份有限公司 | Potential energy recycle and reuse system and rotary drilling rig |
| CN108612687A (en) * | 2018-06-13 | 2018-10-02 | 柳州北斗星液压科技有限公司 | Hydraulic loaded for cterpillar drive tests system |
| CN108799258A (en) * | 2018-07-05 | 2018-11-13 | 方碧水 | A kind of swing arm energy-recuperation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110056549A (en) | 2019-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102587444B (en) | Oil hybrid system for excavator with energy differential recovery | |
| CN102513413B (en) | Hydraulic control system for novel servo pump control bending machine | |
| CN110056549B (en) | Automatic control lifting hydraulic cylinder potential energy recovery system and method | |
| CN108383039B (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN101603527A (en) | A kind of emulsion pump testing system | |
| CN105697475B (en) | A kind of potential energy recycling system and method for high-order extractor | |
| CN111649023B (en) | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| WO2018210084A1 (en) | Automatic-pressure-matching energy utilization system | |
| CN1325756C (en) | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology | |
| CN108533546A (en) | It is directly driven using double pump and the hydraulic crawler excavator dynamical system of the automatic changing-over of differential F.F. | |
| CN201433884Y (en) | Emulsion pump testing system | |
| CN208634123U (en) | It is directly driven using double pump and the hydraulic crawler excavator dynamical system of the automatic changing-over of differential F.F. | |
| CN214063418U (en) | Efficient and energy-saving hydraulic system of metal hydraulic packing machine | |
| CN109267599A (en) | The excavator dynamical system that distributed two parallel pumps directly drive | |
| CN210949311U (en) | Real-time recovery and utilization system for winch potential energy | |
| CN116240941A (en) | Servo pump control system for excavator movable arm and energy regulation and control method | |
| CN108468672B (en) | Energy-saving hydraulic system of stepping heating furnace | |
| CN214743136U (en) | Super capacitor energy storage type secondary regulation flow coupling system | |
| CN209959629U (en) | Automatic control potential energy recovery system for lifting hydraulic cylinder | |
| CN203641137U (en) | Motor energy-saving system for open hydraulic system | |
| CN110701151A (en) | Hydraulic potential energy recycling and utilizing system | |
| CN108591189B (en) | Variable-parameter energy accumulator control system and movable arm energy-saving hydraulic system | |
| CN203383262U (en) | Pilot control device of prefill valve of steel grasping machine | |
| CN102966138A (en) | Energy-saving method for positive flow of hydraulic system of loader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211102 Address after: Room 1-101a309, building 1, science and technology entrepreneurship building, No. 19, Yangshan Road, economic and Technological Development Zone, Xuzhou, Jiangsu 221000 Patentee after: Weierlide (Xuzhou) Construction Machinery Technology Research Institute Co.,Ltd. Address before: No.438, west section of Hebei Street, Haigang District, Qinhuangdao City, Hebei Province Patentee before: Yanshan University |