CN108980122B - Energy storage system suitable for hydraulic passive suspension in hilly and mountain areas - Google Patents
Energy storage system suitable for hydraulic passive suspension in hilly and mountain areas Download PDFInfo
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- CN108980122B CN108980122B CN201811085175.1A CN201811085175A CN108980122B CN 108980122 B CN108980122 B CN 108980122B CN 201811085175 A CN201811085175 A CN 201811085175A CN 108980122 B CN108980122 B CN 108980122B
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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
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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
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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
- F15B2211/21—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
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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
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
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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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Abstract
The invention relates to an energy storage system of a hydraulic passive suspension suitable for hilly and mountain areas, which comprises the following energy storage processes: when the road surface is uneven, the second two-position two-way electromagnetic hydraulic valve is opened, the second two-position two-way proportional reversing valve, the three-position three-way proportional reversing valve and the three-position four-way proportional reversing valve are closed, when the pressure detection device detects that the first small energy accumulator and the second small energy accumulator are full, the second two-position two-way electromagnetic reversing valve and the third two-position two-way electromagnetic reversing valve are closed, the first two-position two-way electromagnetic reversing valve and the fourth two-way electromagnetic reversing valve are opened, and the large energy accumulator starts to store energy; when in the energy release state: the first small energy accumulator and the second small energy accumulator release energy first, the first large energy accumulator and the second large energy accumulator release energy again, when the second pressure detecting device and the fourth pressure detecting device detect that the lowest storage pressure of the energy accumulators is reached, the first electromagnetic reversing valve, the fourth electromagnetic reversing valve, the third electromagnetic reversing valve and the fourth electromagnetic reversing valve are closed, and the external power source drives the working part to work. The invention collects the compression energy of the hydraulic suspension for energy supply of other working parts, and is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a hydraulic energy storage system of agricultural machinery, in particular to an energy storage system of a hydraulic passive suspension suitable for hilly and mountain areas.
Background
The area of the hilly and mountain areas is about more than 1/3 of the area of the national land in China, and more agricultural complete equipment aiming at the hilly and mountain areas has been developed and put into the market in the years. The main characteristics of the hilly and mountain land type are large ground fluctuation, irregularity and steep slope, so that the complete machine equipment designed for the conventional road has the phenomenon of water and soil distaking in the hilly and mountain area. Continuous rough road conditions are a great challenge for suspensions, with a concomitant great energy loss. How to combine the hydraulic energy storage with the hydraulic passive suspension of the agricultural machinery to realize good energy storage and release functions becomes a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide an energy storage system suitable for a hydraulic passive suspension in a hilly and mountain area, which can collect energy loss caused by road surface fluctuation and simultaneously supply the energy loss to other working parts, is energy-saving and environment-friendly, and realizes energy recovery and reutilization.
The invention adopts the following technical scheme:
an energy storage system suitable for a hydraulic passive suspension in hilly and mountainous areas comprises a generator energy recovery system for supplying power to a whole generator and a working component energy recovery system for supplying power to a working component; the generator energy recovery system comprises two parallel suspension hydraulic cylinders with return springs, wherein an oil outlet of a rodless cavity of each suspension hydraulic cylinder is connected with a first check valve 21 and a first filter 20 in parallel, the first check valve 21 is pushed open by oil due to a certain vacuum degree of the rodless cavity in the ascending process of the suspension hydraulic cylinder, oil suction from an oil tank 11 is realized, the first check valve 21 is closed in the descending process of the hydraulic cylinder, hydraulic oil flows through the first filter 20, an oil outlet of the first filter 20 is connected with a first safety valve 19 and a first spring-loaded check valve 18 in parallel, and the first spring-loaded check valve 18 is opened against spring force in the descending process of the hydraulic cylinder and is completely closed when the hydraulic cylinder ascends to suck oil; the oil outlet of the first spring-loaded one-way valve 18 is connected in parallel with a second two-position two-way proportional reversing valve 15, a first two-position two-way electromagnetic reversing valve 16 and a second two-position two-way electromagnetic reversing valve 17, the oil outlet of the second two-position two-way electromagnetic reversing valve 17 is connected with a first small energy accumulator 6, when the second two-position two-way electromagnetic reversing valve 17 is positioned at the left position, the first small energy accumulator 6 stores or releases energy, a first pressure detection device 5 is arranged between the first small energy accumulator 6 and the second two-position two-way electromagnetic reversing valve 17 and is used for monitoring the internal pressure of the first small energy accumulator 6 in real time, the oil outlet of the first two-position two-way electromagnetic reversing valve 16 is connected with a first large energy accumulator 8, and a second pressure detection device 7 is arranged between the first large energy accumulator 8 and the first two-position two-way electromagnetic reversing valve 16 and is used for monitoring the internal pressure of the first large energy accumulator 8 in real time; the oil outlet of the second two-position two-way proportional reversing valve 15 is connected with a constant-pressure proportional pressure reducing valve 14 for ensuring constant pressure of the oil outlet, the oil outlet of the constant-pressure proportional pressure reducing valve 14 is connected with a gear motor 12, and the gear motor 12 is used for driving a generator 13; the power source a10 is connected with a first two-position two-way proportional reversing valve 9 for controlling whether the power source a works or not, and a second two-position two-way proportional reversing valve 15 is used for controlling whether the first large and small accumulators 6 and 8 work or not and has the function of regulating the flow of the system; the power sources of the working part energy recovery system are a first suspension hydraulic cylinder 1 and a second suspension hydraulic cylinder 2, the first suspension hydraulic cylinder and the second suspension hydraulic cylinder are provided with return springs, a complete machine frame is arranged at the upper part of one side of a rod cavity, an oil outlet of a rodless cavity is connected in parallel with a second one-way valve 22 and a second filter 23, the second one-way valve 22 is jacked by oil liquid due to a certain vacuum degree of the rodless cavity of the hydraulic cylinder in the ascending process of the hydraulic cylinder, oil suction from an oil tank 11 is realized, the hydraulic oil is sealed in the descending process of the hydraulic cylinder, hydraulic oil flows through the second filter 23, an oil outlet of the second filter 23 is connected in parallel with a second safety valve 24 and a second one-way valve 25 with a spring, the second safety valve 24 is used for setting system safety pressure relief, the second one-way valve 25 with the spring is opened in the descending process of the hydraulic cylinder against spring force when the system is overpressurized, the hydraulic cylinder is completely closed when ascending and absorbing oil, the oil outlet of the second one-way valve 18 with the spring is connected with a third two-position two-way electromagnetic reversing valve 26 and a fourth two-position two-way electromagnetic reversing valve 31 in parallel, the oil outlet of the third two-position two-way electromagnetic reversing valve 26 is connected with a second small energy accumulator 28, a third pressure detection device 27 is arranged between the second small energy accumulator 28 and the third two-position two-way electromagnetic reversing valve 26 and used for monitoring the internal pressure of the second small energy accumulator 28 in real time, the oil outlet of the fourth two-position two-way electromagnetic reversing valve 31 is connected with a second large energy accumulator 29, and a fourth pressure detection device 30 is arranged between the second large energy accumulator 29 and the two-position fourth two-way electromagnetic reversing valve 31 and used for monitoring the internal pressure of the second large energy accumulator 29 in real time; the power source b33 is connected with a third two-position two-way proportional reversing valve 32 for controlling the on-off of an oil way; the plunger motor 35 is a bidirectional variable motor, and can drive the rotary load 36 to operate; the bidirectional hydraulic cylinder 38 can push the first horizontal moving load 37 and the second horizontal moving load 39 on two sides of the bidirectional hydraulic cylinder to do linear motion.
The three-position three-way proportional reversing valve 34 has three functions: 1) Controlling whether the size accumulator supplies power to the plunger motor; 2) Controlling the flow and then varying the plunger motor speed; 3) Reversing to change the direction of the plunger motor. The three-position four-way proportional reversing valve 40 has three functions: 1) Controlling whether the large and small accumulators supply energy to the bidirectional hydraulic cylinder; 2) Controlling the flow and then changing the speed of the bidirectional hydraulic cylinder; 3) Reversing to change the direction of movement of the bi-directional hydraulic cylinder.
The working method of the energy storage system suitable for the hydraulic passive suspension in hilly and mountain areas is that when the second two-position two-way proportional reversing valve 15 is in the lower position, the first small energy storages 6 and 8 are powered outwards, and when the second two-position two-way proportional reversing valve 15 is in the upper position, the first small energy storages 6 and 8 are powered outwards and the power supply outwards is stopped; when neither the first small accumulator 6 nor the first large accumulator 8 has energy reserves, then the power source a10 is used.
Further, when the three-position three-way proportional directional valve 34 is in the upper position, the plunger motor 35 rotates forward, when the three-position three-way proportional directional valve 34 is in the middle position, the plunger motor 35 does not work, and when the three-position three-way proportional directional valve 34 is in the lower position, the plunger motor 35 rotates reversely; when the three-position four-way proportional reversing valve 40 is in the upper position, the bidirectional hydraulic cylinder 38 moves rightward, when the three-position four-way proportional reversing valve 40 is in the middle position, the bidirectional hydraulic cylinder 38 stops moving, and when the three-position four-way proportional reversing valve 40 is in the lower position, the bidirectional hydraulic cylinder 38 moves leftward; when neither the second small accumulator 28 nor the second large accumulator 29 has energy reserve, then the power source b33 is used.
Further, the energy storage process comprises the following steps: the energy storage device is free of energy storage in the initial state, when the suspension is excited by uneven road surface, the second electromagnetic hydraulic valve 17 and the third electromagnetic hydraulic valve 26 are opened, meanwhile, the second electromagnetic hydraulic valve 15, the third electromagnetic hydraulic valve 34 and the third electromagnetic hydraulic valve 40 are closed, at the moment, the first small energy storage device 6 and the second small energy storage device 28 store energy, when the pressure detection device detects that the first small energy storage device 6 and the second small energy storage device 28 store energy, the second electromagnetic hydraulic valve 17 and the third electromagnetic hydraulic valve 26 are closed, the first electromagnetic hydraulic valve 16 and the fourth electromagnetic hydraulic valve 31 are opened, at the moment, the first large energy storage device 8 and the second large energy storage device 29 store energy, and when the pressure detection device detects that the first energy storage device 8 and the second large energy storage device 29 store energy, the first electromagnetic hydraulic valve 16 and the fourth electromagnetic hydraulic valve 31 are closed, and the energy storage device stops storing energy; when the energy storage device is in the energy release state, the energy storage device is provided with energy storage, when the executive component needs to work, the second two-position and three-position two-way electromagnetic reversing valves 17 and 26 are opened, meanwhile, the second two-position and two-way proportional reversing valve 15, the three-position and three-way proportional reversing valve 34 and the three-position and four-way proportional reversing valve 40 are opened, the first small energy storage device 6 and the second small energy storage device 28 release energy, when the second pressure detection device 5 and the third pressure detection device 27 detect that the lowest storage pressure of the energy storage device is reached, the second two-position and three-position two-way electromagnetic reversing valves 17 and 26 are closed, the first two-position and four-position two-way electromagnetic reversing valves 16 and 31 are opened, the second two-position and four-position and two-way proportional reversing valve 15, the three-position and three-way proportional reversing valve 34 are opened according to the fact that the executive component is working or not, the first large energy storage device 8 and the first energy storage device 29 release energy, and the fourth two-position and two-way electromagnetic reversing valve 16 and 31 are closed when the second pressure detection device 7 and the fourth pressure detection device 30 detect that the lowest storage pressure of the energy storage device is reached, and the first two-position and two-way electromagnetic reversing valves 9 and the two-position and two-way electromagnetic reversing valves are opened, and the working power source is driven to work.
The invention has the beneficial effects that:
1) The system can collect the compression energy of the hydraulic suspension caused by road surface excitation and is used for supplying energy to other working parts, is energy-saving and environment-friendly, and realizes the recycling of energy.
2) The system has wide applicability, and can not only supply energy to the whole generator, but also drive a rotary load and a horizontal moving load. At the same time, the speed and direction of the actuator can be adjusted.
3) The system has strong reliability, and the external power source is arranged while the energy recovery is realized, so that the energy supply can be realized when the energy accumulator is insufficient, and the normal use of the working element is not influenced.
4) The system is high in safety, the pressure detection device of the energy accumulator is arranged, and the corresponding hydraulic valve can be automatically closed when the energy accumulator can not continuously store energy, so that the energy is prevented from being overcharged.
5) The constant pressure reducing valve is arranged on the energy supply loop of the generator, so that the constant output pressure can be realized, and the fluctuation of the system is reduced because the load of the engine can be considered constant.
6) The hydraulic passive suspension system is suitable for the hydraulic passive suspension system in hilly and mountain areas, and has the advantages of comprehensive design consideration, strong adaptability and high reliability.
Drawings
Fig. 1 is a schematic diagram of an energy storage system of the present invention suitable for use in a hydraulic passive suspension in hilly and mountainous areas.
Fig. 2 is a control diagram of an energy storage process.
Fig. 3 is a control diagram of the energy release process.
In the figure, a first suspension hydraulic cylinder, a second suspension hydraulic cylinder, a third suspension hydraulic cylinder, a fourth suspension hydraulic cylinder, a 5 7 27 30 first, second, third and fourth pressure detection devices, a 6 28 first, second small energy accumulators, an 8 29 first, second large energy accumulators, 9 15 32 first, second and third two-position two-way proportional reversing valves, a10 power source a, an 11 oil tank, a 12 gear motor, a 13 generator, a 14 constant pressure proportional pressure reducing valve, 16 17 26 31 first, second, third and fourth two-position two-way electromagnetic reversing valves, 18 25 first and second spring-loaded one-way valves, 19 first and second safety valves, 20 first and second filters, 21 22 first and second one-way valves, 33 power source b,34 three-position three-way proportional reversing valves, 35 plunger motors, 36 rotary loads, 37 39 first and second horizontal moving loads, 38 double-acting hydraulic cylinders and 40 three-position four-way proportional reversing valves.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
Fig. 1 is a schematic diagram of a hydraulic system, referring to fig. 1, the power source of the energy recovery system of the whole generator is a suspension hydraulic cylinder 3 and a suspension hydraulic cylinder 4, the suspension hydraulic cylinders 3 and 4 are compressed due to road surface excitation, a larger return spring with rigidity is arranged on one side upper part of a rod cavity, the whole frame is connected with an oil outlet of a rodless cavity of the hydraulic cylinder, a one-way valve 21 and a filter 20 are connected in parallel, the one-way valve is opened in the rising process of the hydraulic cylinder, oil is absorbed from an oil tank, the hydraulic oil is sealed in the falling process of the hydraulic cylinder, hydraulic oil flows through the filter 20, the filter 20 is finely filtered, the service life of proportional components in a loop is not reduced or even damaged due to oil pollution, an oil outlet of the filter 20 is connected in parallel with a safety valve 19 and a one-way valve 18 with a spring, the safety valve 19 is used for setting the safety pressure of the system, when the system is in overpressure, the one-way valve 18 with the spring is opened against the spring force in the descending process of the hydraulic cylinder, is completely closed when the hydraulic cylinder ascends to absorb oil, has good sealing performance, an oil outlet of the one-way valve 18 with the spring is connected with the two-position two-way proportional reversing valve 15 and the two-position two-way electromagnetic reversing valves 16 and 17 in parallel, the two-position two-way electromagnetic reversing valve 17 is connected with the small oil accumulator 6, when the two-position two-way electromagnetic reversing valve 17 is in the left position, the small energy accumulator 6 stores or releases energy, when the two-position two-way electromagnetic reversing valve 17 is in the right position, the small energy accumulator 6 does not exchange energy, a pressure detection device 5 is arranged between the small energy accumulator 6 and the two-position two-way electromagnetic reversing valve 17 and is used for monitoring the internal pressure of the small energy accumulator 6 in real time, the two-position two-way electromagnetic reversing valve 16 is connected with the large energy accumulator 8, when the two-position two-way electromagnetic reversing valve 16 is at the left position, the large energy accumulator 8 stores or releases energy, when the two-position two-way electromagnetic reversing valve 16 is at the right position, the large energy accumulator 8 does not exchange energy, and a pressure detection device 7 is arranged between the large energy accumulator 8 and the two-position two-way electromagnetic reversing valve 16 and used for monitoring the internal pressure of the large energy accumulator 8 in real time. When the small energy accumulator 6 and the large energy accumulator 8 have no energy storage, a power source a is needed, the power source a is connected with a two-position two-way proportional reversing valve 9, and the two-position two-way proportional reversing valve 9 has two functions: 1) Controlling whether the power source a works or not; 2) Controlling the flow in turn varies the actuator speed. When the two-position two-way proportional reversing valve 9 is in the lower position, the power source a works, and when the two-position two-way proportional reversing valve 9 is in the upper position, the power source a stops working. The two-position two-way proportional reversing valve 15 has two functions: 1) Controlling whether the size accumulator is externally powered; 2) Controlling the flow in turn varies the actuator speed. When the two-position two-way proportional reversing valve 15 is in the lower position, the small or large energy accumulators 6 and 8 are powered outwards, and when the two-position two-way proportional reversing valve 15 is in the upper position, the small or large energy accumulators 6 and 8 are powered outwards and stop being powered outwards. When the gear motor 12 needs to work, the two-position two-way proportional reversing valves 9 and 15 adopt an interlocking mechanism, namely when the two-position two-way proportional reversing valve 9 is in an upper position, the two-position two-way proportional reversing valve 15 is in a lower position, and when the two-position two-way proportional reversing valve 15 is in an upper position, the two-position two-way proportional reversing valve 9 is in a lower position. The oil outlet of the two-position two-way proportional reversing valve 15 is connected with a constant-pressure proportional pressure reducing valve 14 for ensuring constant pressure of the oil outlet, the oil outlet of the constant-pressure proportional pressure reducing valve 14 is connected with a gear motor 12, and the gear motor 12 is used for driving a generator 13.
The power source of the energy recovery system of other working parts is compression of the suspension hydraulic cylinder 1 and the suspension hydraulic cylinder 2 caused by road surface excitation, the suspension hydraulic cylinders a and b are provided with larger return springs with rigidity, one side upper part of a rod cavity is connected with a whole frame, an oil outlet of a rodless cavity of the hydraulic cylinder is connected with a one-way valve 22 and a filter 23 in parallel, the one-way valve is opened in the ascending process of the hydraulic cylinder to realize oil suction from an oil tank, the hydraulic oil is closed in the descending process of the hydraulic cylinder to flow through the filter 23, the filter 20 is finely filtered to ensure that proportional components in a loop are not polluted by oil to cause service life reduction or even damage, an oil outlet of the filter 23 is connected with a safety valve 24 and a one-way valve 25 with a spring in parallel, the safety valve 24 is used for setting system safety pressure, and unloading is opened when the system is in overpressure, the one-way valve 25 with spring is opened against spring force in the descending process of the hydraulic cylinder, is completely closed when the hydraulic cylinder ascends to absorb oil, has better sealing performance, the oil outlet of the one-way valve 18 with spring is connected with two-position two-way electromagnetic reversing valves 25, 31, three-position three-way proportional reversing valve 34 and three-position four-way proportional reversing valve 40 in parallel, the oil outlet of the two-position two-way electromagnetic reversing valve 26 is provided with a small accumulator 28, when the two-position two-way electromagnetic reversing valve 26 is positioned at the left position, the small accumulator 28 stores or releases energy, when the two-position two-way electromagnetic reversing valve 26 is positioned at the right position, the small accumulator 28 does not exchange energy, a pressure detection device 27 is arranged between the small accumulator 28 and the two-position two-way electromagnetic reversing valve 26 and is used for monitoring the internal pressure of the small accumulator 28 in real time, the oil outlet of the two-position two-way electromagnetic reversing valve 31 is connected with the large accumulator 29, when the two-position two-way electromagnetic reversing valve 31 is in the left position, the large energy accumulator 29 stores or releases energy, and when the two-position two-way electromagnetic reversing valve 31 is in the right position, the large energy accumulator 29 does not exchange energy, and a pressure detection device 30 is arranged between the large energy accumulator 29 and the two-position two-way electromagnetic reversing valve 31 and used for monitoring the internal pressure of the large energy accumulator 29 in real time. When the small energy accumulator 28 and the large energy accumulator 29 have no energy reserve, a power source b is needed to be used 33, the power source b is connected with a two-position two-way proportional reversing valve 32, and the two-position two-way proportional reversing valve 32 has two functions: 1) Controlling whether the power source b works or not; 2) Controlling the flow in turn varies the actuator speed. When the two-position two-way proportional directional valve 32 is in the lower position, the power source b works, and when the two-position two-way proportional directional valve 32 is in the upper position, the power source b stops working. The three-position three-way proportional reversing valve 34 has three functions: 1) Controlling whether the size accumulator powers the plunger motor 35; 2) Controlling the flow and in turn changing the plunger motor 35 speed; 3) Reversing to change the direction of the plunger motor 35. When the three-position three-way proportional directional valve 34 is in the upper position, the plunger motor 35 is rotated in the forward direction, when the three-position three-way proportional directional valve 34 is in the middle position, the plunger motor 35 is not operated, and when the three-position three-way proportional directional valve 34 is in the lower position, the plunger motor 35 is rotated in the reverse direction. The plunger motor 35 is a bi-directional variable motor that drives the rotary load 36. The three-position four-way proportional reversing valve 40 has three functions: 1) Control whether the size accumulator powers the bi-directional hydraulic cylinder 38; 2) Controlling the flow and in turn changing the speed of the bi-directional hydraulic cylinder 38; 3) Reversing to change the direction of movement of the bi-directional hydraulic cylinder 38. When the three-position four-way proportional directional valve 40 is in the upper position, the bidirectional hydraulic cylinder 38 moves rightward, when the three-position four-way proportional directional valve 40 is in the middle position, the bidirectional hydraulic cylinder 38 stops moving, and when the three-position four-way proportional directional valve 40 is in the lower position, the bidirectional hydraulic cylinder 38 moves leftward. The bidirectional hydraulic cylinder 38 can push the horizontal moving loads 37 and 39 to do linear motion.
FIG. 2 is a control diagram of an energy storage process. With reference to figure 2 of the drawings,
the energy storage process is that the energy storage device is free of energy storage in the initial state, when the suspension is excited by uneven pavement, the hydraulic valves 17 and 26 are opened according to requirements, meanwhile, the hydraulic valves 15, 34 and 40 are closed according to requirements, at the moment, the energy storage device 6 and the energy storage device 28 store energy, when the pressure detection device detects that the energy storage device 6 and the energy storage device 28 are full, the hydraulic valves 17 or 26 are closed according to requirements, the hydraulic valves 16 or 31 are opened according to requirements, at the moment, the energy storage device 8 and the energy storage device 29 store energy, and when the pressure detection device detects that the energy storage device 8 and the energy storage device 29 are full, the hydraulic valves 16 and 31 are closed according to requirements, and energy storage is stopped.
When the energy storage device is in the energy release state, energy reserves exist in the energy storage device, when the executive component needs to work, the hydraulic valves 17 and 26 are opened according to the requirements, meanwhile, the hydraulic valves 15, 34 and 40 are opened according to the requirements, the energy storage devices 6 and 28 release energy at the moment, when the pressure detection devices 5 and 27 detect that the lowest storage pressure of the energy storage device is reached, the hydraulic valves 17 and 26 are closed according to the detection results, the hydraulic valves 16 and 31 are opened according to the requirements, meanwhile, the hydraulic valves 15, 34 and 40 are opened according to whether the executive component works or not, the energy storage devices 8 and 29 release energy at the moment, when the pressure detection devices 7 and 30 detect that the lowest storage pressure of the energy storage device is reached, the hydraulic valves 16 and 31 are closed according to the requirements, the hydraulic valves 9 and 32 are opened according to the requirements, and at the moment, the external power source drives the working part to work.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the claimed invention.
Claims (3)
1. The working method of the energy storage system suitable for the hydraulic passive suspension in hilly and mountain areas is characterized by comprising the following steps of:
the energy storage system suitable for the hydraulic passive suspension in the hilly and mountain area comprises a generator energy recovery system for supplying to the whole generator and a working component energy recovery system for supplying to the working component;
the generator energy recovery system comprises two parallel suspension hydraulic cylinders with return springs, wherein an oil outlet of a rodless cavity of each suspension hydraulic cylinder is connected with a first check valve (21) and a first filter (20) in parallel, the first check valve (21) is pushed open by oil liquid due to a certain vacuum degree of the rodless cavity in the ascending process of the suspension hydraulic cylinder, oil suction from an oil tank (11) is realized, the first check valve (21) is closed in the descending process of the hydraulic cylinder, hydraulic oil flows through the first filter (20), the oil outlet of the first filter (20) is connected with a first safety valve (19) and a first spring-loaded check valve (18) in parallel, and the first spring-loaded check valve (18) is opened against spring force in the descending process of the hydraulic cylinder and is completely closed when the hydraulic cylinder ascends to suck oil; the oil outlet of the first one-way valve (18) with the spring is connected with a second two-position two-way proportional reversing valve (15), first two-position two-way electromagnetic reversing valves (16, 17) in parallel, the oil outlet of the second two-position two-way electromagnetic reversing valve (17) is connected with a first small energy accumulator (6), when the second two-position two-way electromagnetic reversing valve (17) is positioned at the left position, the first small energy accumulator (6) stores or releases energy, a first pressure detection device (5) is arranged between the first small energy accumulator (6) and the second two-position two-way electromagnetic reversing valve (17) and is used for monitoring the internal pressure of the first small energy accumulator (6) in real time, the oil outlet of the first two-position two-way electromagnetic reversing valve (16) is connected with the first large energy accumulator (8), and a second pressure detection device (7) is arranged between the first large energy accumulator (8) and the first two-position two-way electromagnetic reversing valve (16) and is used for monitoring the internal pressure of the first large energy accumulator (8) in real time; an oil outlet of the second two-position two-way proportional reversing valve (15) is connected with a constant-pressure proportional pressure reducing valve (14) for ensuring constant pressure of the oil outlet, the oil outlet of the constant-pressure proportional pressure reducing valve (14) is connected with a gear motor (12), and the gear motor (12) is used for driving a generator (13); the power source a (10) is connected with a first two-position two-way proportional reversing valve (9) for controlling whether the power source a works or not, and a second two-position two-way proportional reversing valve (15) is used for controlling whether the first large and small energy accumulators (6, 8) work or not and has the function of regulating the flow of the system;
the power sources of the working part energy recovery system are a first suspension hydraulic cylinder (1) and a second suspension hydraulic cylinder (2), the first suspension hydraulic cylinder and the second suspension hydraulic cylinder are provided with a return spring, a whole frame is arranged at the upper part of one side of a rod cavity, an oil outlet of a rodless cavity is connected with a second one-way valve (22) and a second filter (23) in parallel, the second one-way valve (22) is opened by oil liquid due to a certain vacuum degree of the rodless cavity of the hydraulic cylinder in the ascending process of the hydraulic cylinder, oil is absorbed from an oil tank (11) in the descending process of the hydraulic cylinder, hydraulic oil flows through the second filter (23), an oil outlet of the second filter (23) is connected with a second safety valve (24) and a second one-way valve (25) with a spring in parallel, the second safety valve (24) is used for setting system safety pressure, the second one-way valve (25) is opened when the system is overpressurized, the second one-way valve (25) is opened by overcoming spring force in the descending process of the hydraulic cylinder, the hydraulic cylinder is completely closed when the hydraulic cylinder ascends, the hydraulic cylinder is connected with a third one-way valve (25) with a third one-way valve, a fourth one-way valve (26), a third magnetic reversing valve (32) and a small proportion valve (32) are connected with the third one-way valve (40), the two-way reversing valve (32), a third pressure detection device (27) is arranged between the second small energy accumulator (28) and the third two-position two-way electromagnetic reversing valve (26) and is used for monitoring the internal pressure of the second small energy accumulator (28) in real time, an oil outlet of the fourth two-position two-way electromagnetic reversing valve (31) is connected with the second large energy accumulator (29), and a fourth pressure detection device (30) is arranged between the second large energy accumulator (29) and the two-position fourth two-way electromagnetic reversing valve (31) and is used for monitoring the internal pressure of the second large energy accumulator (29) in real time; the power source b (33) is connected with a third two-position two-way proportional reversing valve (32) for controlling the on-off of an oil way; the plunger motor (35) is a bidirectional variable motor, and can drive the rotary load (36) to operate; the bidirectional hydraulic cylinder (38) can push the first horizontal moving load (37) and the second horizontal moving load (39) on two sides of the bidirectional hydraulic cylinder to do linear motion;
when the second two-position two-way proportional reversing valve (15) is in a lower position, the first small and large energy accumulators (6, 8) are used for supplying energy outwards, and when the second two-position two-way proportional reversing valve (15) is in an upper position, the first small and large energy accumulators (6, 8) are used for supplying energy outwards and stopping supplying energy outwards;
when neither the first small accumulator (6) nor the first large accumulator (8) has energy reserves, the power source a (10) is used.
2. A method of operating an energy storage system for a hydraulic passive suspension as defined by claim 1 wherein:
when the three-position three-way proportional reversing valve (34) is in an upper position, the plunger motor (35) rotates positively, when the three-position three-way proportional reversing valve (34) is in a middle position, the plunger motor (35) does not work, and when the three-position three-way proportional reversing valve (34) is in a lower position, the plunger motor (35) rotates reversely;
when the three-position four-way proportional reversing valve (40) is in an upper position, the bidirectional hydraulic cylinder (38) moves rightwards, when the three-position four-way proportional reversing valve (40) is in a middle position, the bidirectional hydraulic cylinder (38) stops moving, and when the three-position four-way proportional reversing valve (40) is in a lower position, the bidirectional hydraulic cylinder (38) moves leftwards;
when neither the second small accumulator (28) nor the second large accumulator (29) has energy reserves, the power source b (33) is used.
3. A method of operating an energy storage system for a hydraulic passive suspension according to claim 1 or 2, characterized by:
the energy storage process comprises the following steps: the energy accumulator in the initial state is free from energy storage, when the suspension is excited by uneven road surface, the second electromagnetic hydraulic valve (17) and the third electromagnetic hydraulic valve (26) are opened, meanwhile, the second electromagnetic proportional reversing valve (15), the third electromagnetic proportional reversing valve (34), the third electromagnetic proportional reversing valve (32) and the third electromagnetic proportional reversing valve (40) are closed, at the moment, the first small energy accumulator (6) and the second small energy accumulator (28) store energy, when the pressure detection device detects that the first small energy accumulator (6) and the second small energy accumulator (28) store energy, the second electromagnetic reversing valve (17) and the third electromagnetic reversing valve (26) are closed, the first electromagnetic reversing valve and the fourth electromagnetic reversing valve (16) are opened, at the moment, the first large energy accumulator (8) and the second large energy accumulator (29) store energy, and the first electromagnetic reversing valve (16) and the fourth electromagnetic reversing valve (31) are closed when the pressure detection device detects that the first energy accumulator (8) and the second energy accumulator (29) store energy, and the fourth electromagnetic reversing valve are stopped;
when the energy storage device is in a discharging state, energy storage exists in the energy storage device, when the executing element needs to work, the second two-position and three-position two-way electromagnetic reversing valves (17 and 26) are opened, meanwhile, the second two-position two-way proportional reversing valve (15), the three-position three-way proportional reversing valve (34) and the three-position four-way proportional reversing valve (40) are opened according to the fact that whether the executing element works or not, the first small energy storage device and the second small energy storage device (6 and 28) release energy, when the second pressure detection device and the three pressure detection device (5 and 27) detect that the lowest storage pressure of the energy storage device is reached, the second two-position and three-way electromagnetic reversing valves (17 and 26) are closed, the first two-position and four-position two-way electromagnetic reversing valves (16 and 31) are opened, and simultaneously, the second two-position two-way proportional reversing valve (15), the three-position three-way proportional reversing valve (34) and the three-position four-way proportional reversing valve (40) are opened according to whether the executing element works or not, and when the second pressure detection device and the second pressure detection device (7 and the four-pressure detection device (27) detect that the lowest storage pressure of the energy storage device reaches the energy storage device, the first two-position and the energy storage device and the second pressure detection device and the second two-position two-way electromagnetic reversing valve are closed, the first two-way electromagnetic reversing valve and the energy storage device and the energy.
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