CN111207135A - Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder - Google Patents

Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder Download PDF

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Publication number
CN111207135A
CN111207135A CN202010140848.XA CN202010140848A CN111207135A CN 111207135 A CN111207135 A CN 111207135A CN 202010140848 A CN202010140848 A CN 202010140848A CN 111207135 A CN111207135 A CN 111207135A
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Prior art keywords
valve
hydraulic cylinder
reversing valve
accumulator
oil
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CN202010140848.XA
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CN111207135B (en
Inventor
王伟平
周连佺
孙栋
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Jiangsu Normal University
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Jiangsu Normal University
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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
    • F15B21/14—Energy-recuperation means
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/51—Pressure detection
    • 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
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The overflow loss recycling system based on the hydraulic energy accumulator and the four-cavity hydraulic cylinder comprises a driving motor, a pump, a sequence valve, a first reversing valve, a second reversing valve, a third reversing valve, an oil tank, an energy accumulator and the four-cavity hydraulic cylinder, wherein the driving motor is coaxially connected with the pump, and an oil inlet of the pump is connected with the oil tank. The system of the invention adopts a combination form of a sequence valve, a reversing valve and an energy accumulator to replace a conventional overflow valve. On the one hand, the overflow pressure is reduced, the overflow loss energy is recycled and stored through the hydraulic accumulator, and the overflow loss energy is recycled through the reversing valve, so that the problems of overflow loss of the overflow valve and difficulty in mixing of the recycled energy and the driving energy in the past are solved, and integration of recovery and release of the overflow loss is realized.

Description

Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder
Technical Field
The present invention relates to a hydraulic system, and more particularly, to an overflow loss recycling system using a hydraulic accumulator and a four-chamber hydraulic cylinder.
Background
Relief valves are commonly used in hydraulic systems to limit outlet pressure or to regulate pressure. In the inlet throttling speed regulation loop and the outlet throttling speed regulation loop, the overflow valve has an overflow pressure regulation function, and part of hydraulic oil always passes through the overflow valve oil return tank, so that the overflow valve always has overflow loss. When the overflow valve acts as a safety valve, the overflow valve can work only under certain working conditions, but overflow loss also exists. Because the outlet of the overflow valve is usually connected with the oil tank, the loss pressure difference of the valve port is the inlet pressure of the overflow valve. As hydraulic systems develop to high pressure and high flow, the higher the pressure level of the relief valve, the larger the flow through it, the more severe the energy loss. The existing energy-saving hydraulic systems often pay more attention to the utilization of flow and do not fundamentally solve the overflow problem.
Disclosure of Invention
The invention aims to provide a novel overflow loss recycling and reusing system based on a hydraulic energy accumulator and a four-cavity hydraulic cylinder, which realizes the integration of storage and release of overflow loss energy through the application of a sequence valve, a reversing valve, the energy accumulator, an oil tank, a driving motor, a pressure sensor, the four-cavity hydraulic cylinder and the like.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the overflow loss recycling system based on the hydraulic energy accumulator and the four-cavity hydraulic cylinder comprises a driving motor, a pump, a sequence valve, a first reversing valve, a second reversing valve, a third reversing valve, an oil tank, an energy accumulator and a four-cavity hydraulic cylinder, wherein the driving motor is coaxially connected with the pump, an oil inlet of the pump is connected with the oil tank, an oil outlet of the pump is connected with an oil inlet of the sequence valve, an oil outlet of the sequence valve is communicated with an oil inlet P of the first reversing valve, an oil outlet A of the first reversing valve is connected with the energy accumulator, an oil outlet T of the first reversing valve is connected with an oil inlet P of the second reversing valve, and an oil outlet B of the first reversing valve is connected with the oil; an oil outlet of the pump is connected with two chambers of the four-chamber hydraulic cylinder through a third reversing valve; the oil outlet of the second reversing valve is connected with the other two chambers of the four-chamber hydraulic cylinder.
Preferably, the four-chamber hydraulic cylinder is in a pneumatic-hydraulic linkage cylinder form.
Preferably, the sequence valve is a direct acting sequence valve or a pilot sequence valve.
Preferably, the driving motor is a variable frequency motor or a common motor.
Preferably, the pump is a fixed displacement pump or a variable displacement pump.
Preferably, the hydraulic accumulator is a piston accumulator or a gas bag accumulator.
Preferably, the reversing valve is a hydraulic control reversing valve or an electric control reversing valve.
Compared with the prior art, the invention has the beneficial effects that:
the overflow loss recovery and reuse system based on the hydraulic accumulator and the four-cavity hydraulic cylinder adopts a combination form of the sequence valve, the reversing valve and the accumulator to replace an overflow valve, so that the overflow pressure difference is reduced. And the overflow loss energy is recovered and stored through the hydraulic accumulator and is recycled through the reversing valve. Due to the existence of the four-cavity hydraulic cylinder, the recovered energy and the driving energy can be effectively coupled, the problem of energy coupling in the prior scheme is solved, the recovery and release integrated function of overflow loss is realized, and a leading energy-saving control method is provided for hydraulic driving equipment. The oil circuit applicable to the invention comprises an inlet throttling and speed regulating circuit, an outlet throttling and speed regulating circuit, an inlet and outlet linkage throttling and speed regulating circuit, a bypass throttling and speed regulating circuit and the like, and the energy recovery and the reutilization are carried out on the pressure regulating overflow loss or the safety overflow loss generated by the circuits. The invention can be used for recovering and reusing overflow valve overflow loss energy of engineering machinery such as excavators, loaders and the like and other hydraulic equipment.
Drawings
FIG. 1 is a schematic structural diagram of an overflow loss recycling system based on a hydraulic accumulator and a four-chamber hydraulic cylinder according to an embodiment of the invention;
FIG. 2 is a schematic diagram of energy recovery during piston ejection of the recycling system;
FIG. 3 is a schematic diagram of energy recovery upon retraction of a piston of the recovery system;
FIG. 4 is a schematic illustration of the energy release during piston ejection of the recycling system;
FIG. 5 is a schematic view of the energy release upon retraction of the piston of the recycling system;
in fig. 1, a drive motor; 2. an oil tank; 3. a pump; 4. a sequence valve; 5. an oil tank; 6. a first direction changing valve; 7. a pressure sensor; 8. an accumulator; 9. an oil tank; 10. a third directional control valve; 11. an oil tank; 12. a four-chamber hydraulic cylinder; 13. a second directional control valve; 14. and an oil tank.
The specific implementation mode is as follows:
the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the overflow loss recycling system based on the hydraulic accumulator and the four-chamber hydraulic cylinder comprises a driving motor 1, an oil tank 2, a pump 3, a sequence valve 4, an oil tank 5, a first reversing valve 6, a pressure sensor 7, an accumulator 8, an oil tank 9, a third reversing valve 10, an oil tank 11, a four-chamber hydraulic cylinder 12 and a second reversing valve 13.
The driving motor 1 is coaxially connected with the pump 3, an oil inlet of the pump 3 is connected with the oil tank 2, an oil outlet of the pump 3 is connected with an oil inlet of the sequence valve 4, an oil outlet of the sequence valve 4 is communicated with an oil inlet P of the first reversing valve 6, an oil outlet A of the first reversing valve 6 is connected with the energy accumulator 8, and a pressure sensor 7 is further installed on a pipeline between the energy accumulator 8 and the first reversing valve 6. An oil outlet P of the first reversing valve 6 is connected with an oil inlet P of the second reversing valve 13, and an oil outlet B of the first reversing valve 6 is connected with an oil tank 9; an oil outlet of the pump 3 is connected with two chambers of a four-chamber hydraulic cylinder 12 through a third reversing valve 10; the oil outlet of the second reversing valve 13 is connected with the other two chambers of the four-chamber hydraulic cylinder 12.
The overflow loss recycling system based on the hydraulic accumulator and the four-cavity hydraulic cylinder has the following working principle:
when the hydraulic system does not work, the first reversing valve 6 is at the lower position under the spring force, the oil outlet is connected with the energy accumulator, the pressure sensor 7 works, the second reversing valve 13 is at the middle position and is closed, and the oil tank 9 is not communicated. The maximum working pressure of the accumulator should be lower than the set pressure of the sequence valve. Whether the pressing force sensor 7 detects the set pressure value may be classified into the following two conditions. And when the detection value of the pressure sensor does not exceed the highest working pressure of the accumulator, the system is in an energy recovery stage. Once the accumulator pressure reaches the maximum working pressure, the system is in the energy release phase and remains there until the accumulator pressure reaches the minimum working pressure and switches to the energy recovery phase.
(1) And (3) recovering overflow loss energy:
as shown in fig. 2, when the push-out piston works, the third directional valve 10 is in the left position, oil flows into an oil inlet P of the third directional valve 10 from an oil outlet of the pump 3, and flows into the four-chamber hydraulic cylinder from an oil outlet a of the third directional valve 10. Part of oil of the pump 3 flows into an oil inlet of the sequence valve 4, the first reversing valve 6 is at a lower position, the oil outlet of the sequence valve 4 flows into an oil inlet P of the first reversing valve 6 and flows out of an oil outlet A of the first reversing valve 6 to charge the energy accumulator 8, the pressure sensor 7 works, and the pressure condition of the energy accumulator 7 is monitored in real time. The second direction valve 13 does not operate.
As shown in fig. 3, when the retracting piston works, the third directional valve 10 is in the right position under the spring force, oil flows into an oil inlet P of the third directional valve 10 from an oil outlet of the pump 3, and flows into the four-chamber hydraulic cylinder 12 from an oil outlet B of the third directional valve 10. Part of oil of the pump 3 flows into an oil inlet of the sequence valve 4, the first reversing valve 6 is at a lower position under the action of spring force, the oil outlet of the sequence valve 4 flows into an oil inlet P of the first reversing valve 6 and flows out of an oil outlet A of the first reversing valve 6 to charge the energy accumulator 8, the pressure sensor 7 works, and the pressure condition of the energy accumulator 7 is monitored in real time. The second direction valve 13 does not operate.
(2) And (3) overflow loss energy release:
as shown in fig. 4, when the push-out piston works, the third directional valve 10 is located at the left position, oil flows from the oil outlet of the pump 3 into the oil inlet P of the third directional valve 10, and flows from the oil outlet a of the third directional valve 10 into the four-chamber hydraulic cylinder 12. Part of oil at the oil outlet of the pump 3 flows into an oil inlet of the sequence valve 4, the first reversing valve 6 is positioned at an upper position, the oil outlet of the sequence valve 4 flows into an oil inlet P of the first reversing valve 6, the oil outlet B of the first reversing valve 6 flows out and directly flows into the oil tank 9, the flow of the energy accumulator 8 flows into an oil port A of the first reversing valve 6 and is discharged through an oil outlet T, the second reversing valve 13 is positioned at a left position, and the oil of the energy accumulator enters the oil inlet P of the second reversing valve 13 and enters the four-cavity hydraulic cylinder 12 through the oil outlet A, so that the auxiliary system is driven.
As shown in fig. 5, when the retracting piston works, the third directional valve 10 is in the right position, and oil flows from the oil outlet of the pump 3 into the oil inlet P of the third directional valve 10 and from the oil outlet B of the third directional valve 10 into the four-chamber hydraulic cylinder 12. Part of oil at the oil outlet of the pump 3 flows into an oil inlet of the sequence valve 4, the first reversing valve 6 is positioned at an upper position, the oil outlet of the sequence valve 4 flows into an oil inlet P of the first reversing valve 6, the oil outlet B of the first reversing valve 6 flows out and directly flows into the oil tank 9, the flow of the energy accumulator 8 flows into an oil port A of the first reversing valve 6 and is discharged through an oil outlet T, the second reversing valve 13 is positioned at a right position, and the oil of the energy accumulator enters the oil inlet P of the second reversing valve 13 and enters the four-cavity hydraulic cylinder 12 through the oil outlet B, so that the auxiliary system is driven.

Claims (7)

1. The overflow loss recycling system based on the hydraulic energy accumulator and the four-cavity hydraulic cylinder is characterized by comprising a driving motor, a pump, a sequence valve, a first reversing valve, a second reversing valve, a third reversing valve, an oil tank, an energy accumulator and the four-cavity hydraulic cylinder, wherein the driving motor is coaxially connected with the pump, an oil inlet of the pump is connected with the oil tank, an oil outlet of the pump is connected with an oil inlet of the sequence valve, an oil outlet of the sequence valve is communicated with an oil inlet P of the first reversing valve, an oil outlet A of the first reversing valve is connected with the energy accumulator, an oil outlet T of the first reversing valve is connected with an oil inlet P of the second reversing valve, and an oil outlet B of the first reversing valve is connected with the oil tank; an oil outlet of the pump is connected with two chambers of the four-chamber hydraulic cylinder through a third reversing valve; the oil outlet of the second reversing valve is connected with the other two chambers of the four-chamber hydraulic cylinder. And a pressure sensor is arranged on a pipeline between the energy accumulator and the first reversing valve. And judging whether the system is in an energy recovery state or an energy release state by detecting the value of the pressure sensor.
2. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the four-chamber hydraulic cylinder is in the form of a pneumatic-hydraulic linkage cylinder or any other four-chamber hydraulic cylinder.
3. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the sequence valve is a direct acting sequence valve or a pilot sequence valve.
4. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the drive motor is a variable frequency motor or a common motor.
5. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the pump is a fixed displacement pump or a variable displacement pump.
6. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the hydraulic accumulator is a piston accumulator or a bladder accumulator.
7. The hydraulic accumulator and four-chamber hydraulic cylinder based spill loss recovery system of claim 1, wherein the directional valve is a hydraulically controlled directional valve or an electrically controlled directional valve.
CN202010140848.XA 2020-03-03 2020-03-03 Overflow loss recycling system based on hydraulic energy accumulator and four-cavity hydraulic cylinder Active CN111207135B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113096980A (en) * 2021-03-31 2021-07-09 西安交通大学 Quick reversing device and method for on-load tap-changer based on hydraulic transmission

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Publication number Priority date Publication date Assignee Title
EP1862599A2 (en) * 2006-06-01 2007-12-05 Deere & Company Control system for an electronic float feature for a loader
CN103132954A (en) * 2011-11-30 2013-06-05 辽宁东工装备制造有限公司 Full hydraulic changing stroke energy-saving type oil pumping unit
CN103697023A (en) * 2013-12-26 2014-04-02 浙江德泰机电工程有限公司 Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery
CN105026773A (en) * 2013-01-28 2015-11-04 卡特彼勒Sarl Engine-assist device and industrial machine
CN105805097A (en) * 2016-05-06 2016-07-27 华侨大学 Recycling and reusing system of overflow losses of overflow valves
CN106122188A (en) * 2016-08-12 2016-11-16 华侨大学 Conventional overflow valve overflow based on hydraulic accumulator loss recycle and reuse system
WO2017071720A1 (en) * 2015-10-29 2017-05-04 Swidan Mohamed Abdelwahab Wahby Abdelfattah Energy recovery device for water desalination plants (d-a-c)
CN110258684A (en) * 2019-06-21 2019-09-20 江苏师范大学 A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling
CN110486337A (en) * 2019-09-11 2019-11-22 三一海洋重工有限公司 Multiple cavity oil cylinder closed type hydraulic system and engineering machinery

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1862599A2 (en) * 2006-06-01 2007-12-05 Deere & Company Control system for an electronic float feature for a loader
CN103132954A (en) * 2011-11-30 2013-06-05 辽宁东工装备制造有限公司 Full hydraulic changing stroke energy-saving type oil pumping unit
CN105026773A (en) * 2013-01-28 2015-11-04 卡特彼勒Sarl Engine-assist device and industrial machine
CN103697023A (en) * 2013-12-26 2014-04-02 浙江德泰机电工程有限公司 Electro-hydraulic energy recovery and release system for slewing brake of engineering machinery
WO2017071720A1 (en) * 2015-10-29 2017-05-04 Swidan Mohamed Abdelwahab Wahby Abdelfattah Energy recovery device for water desalination plants (d-a-c)
CN105805097A (en) * 2016-05-06 2016-07-27 华侨大学 Recycling and reusing system of overflow losses of overflow valves
CN106122188A (en) * 2016-08-12 2016-11-16 华侨大学 Conventional overflow valve overflow based on hydraulic accumulator loss recycle and reuse system
CN110258684A (en) * 2019-06-21 2019-09-20 江苏师范大学 A kind of energy saver of excavator swing arm single cylinder pressure-bearing energy regenerating and recycling
CN110486337A (en) * 2019-09-11 2019-11-22 三一海洋重工有限公司 Multiple cavity oil cylinder closed type hydraulic system and engineering machinery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113096980A (en) * 2021-03-31 2021-07-09 西安交通大学 Quick reversing device and method for on-load tap-changer based on hydraulic transmission
CN113096980B (en) * 2021-03-31 2022-05-20 西安交通大学 Quick reversing device and method for on-load tap-changer based on hydraulic transmission

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