CN111425466B - Hydraulic energy storage loop and engineering machinery - Google Patents
Hydraulic energy storage loop and engineering machinery Download PDFInfo
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- CN111425466B CN111425466B CN202010285969.3A CN202010285969A CN111425466B CN 111425466 B CN111425466 B CN 111425466B CN 202010285969 A CN202010285969 A CN 202010285969A CN 111425466 B CN111425466 B CN 111425466B
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
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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
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
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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
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Operation Control Of Excavators (AREA)
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Abstract
本发明涉及工程机械液压蓄能节能技术领域，尤其涉及一种液压蓄能回路和工程机械。该液压蓄能回路包括蓄能器组件、换向阀组件和压力传感器组件和控制器；蓄能器组件的入口用于通过换向阀组件连通待节能液压执行元件，蓄能器组件的出口用于连通待致动液压管路；压力传感器组件设置于蓄能器组件并测量蓄能器组件的实时压力；控制器与压力传感器组件电连接，控制器根据实时压力控制换向阀组件动作，以使蓄能器组件与待节能液压执行元件连通或者断开。该工程机械包括该液压蓄能回路。该液压蓄能回路和工程机械，蓄积待节能液压执行元件由回收的机械能转化出的液压能，以不断向待致动液压管路补充液压能，提高工程机械的工作效率并降低油耗。
The invention relates to the technical field of hydraulic energy storage and energy saving of construction machinery, in particular to a hydraulic energy storage circuit and construction machinery. The hydraulic accumulating circuit includes an accumulator assembly, a reversing valve assembly, a pressure sensor assembly and a controller; the inlet of the accumulator assembly is used to communicate with the hydraulic actuator to be saved through the reversing valve assembly, and the outlet of the accumulator assembly is used for is connected to the hydraulic pipeline to be actuated; the pressure sensor assembly is arranged on the accumulator assembly and measures the real-time pressure of the accumulator assembly; the controller is electrically connected with the pressure sensor assembly, and the controller controls the action of the reversing valve assembly according to the real-time pressure, so as to Connect or disconnect the accumulator assembly and the hydraulic actuator to be saved. The construction machine includes the hydraulic energy storage circuit. The hydraulic energy storage circuit and the construction machinery accumulate the hydraulic energy converted from the recovered mechanical energy by the hydraulic actuators to be energy-saving, so as to continuously supplement the hydraulic energy to the hydraulic pipelines to be actuated, improve the working efficiency of the construction machinery and reduce the fuel consumption.
Description
Technical Field
The invention relates to the technical field of hydraulic energy storage and energy conservation of engineering machinery, in particular to a hydraulic energy storage loop and the engineering machinery.
Background
Under the premise that excavators and breaking hammers are increasingly widely used and energy-saving technologies are rapidly developed, the gravitational potential energy of movable arms of the excavators is collected and then utilized, so that the excavator and the breaking hammers are widely concerned.
In the related art, the power source of the hydraulic breaking hammer is hydraulic oil supplied from a pump station of an excavator or a loader, which can more effectively clean floating rocks and soil in a rock gap in the role of excavating a foundation of a building. The existing breaking hammer with an energy accumulator stores the residual energy and the energy of piston recoil when the hydraulic breaking hammer is struck for the previous time, releases the energy stored for the previous time when the hydraulic breaking hammer is struck for the second time, and increases the striking capacity.
The energy-saving effect of the use mode of the energy accumulator is not ideal, so a new hydraulic energy storage loop is urgently needed to be provided to further improve the working efficiency of the breaking hammer and reduce the oil consumption efficiency of the excavator.
Disclosure of Invention
The first purpose of the present invention is to provide a hydraulic energy storage circuit, which solves the technical problem that the energy saving effect of the energy storage using mode of the engineering machinery in the prior art is not ideal to a certain extent.
A second object of the present invention is to provide a construction machine, which solves the technical problem of unsatisfactory energy saving effect of the energy accumulator using method of the construction machine in the prior art to a certain extent.
In order to achieve the above object, the present invention provides the following technical solutions;
in view of the first objective, the present invention provides a hydraulic accumulator circuit comprising an accumulator assembly, a reversing valve assembly, a pressure sensor assembly, and a controller;
the inlet of the accumulator assembly is used for being communicated with a hydraulic actuating element to be saved in energy through the reversing valve assembly, and the outlet of the accumulator assembly is used for being communicated with a hydraulic pipeline to be actuated;
the pressure sensor assembly is arranged on the energy accumulator assembly and can measure the real-time pressure of the energy accumulator assembly;
the controller is electrically connected with the pressure sensor assembly and can control the reversing valve assembly to act according to the real-time pressure so as to enable the energy accumulator assembly to be communicated or disconnected with the hydraulic actuating element to be subjected to energy conservation.
In any of the above technical solutions, optionally, the accumulator assembly includes a primary accumulator and a secondary accumulator sequentially communicated between the hydraulic actuator to be saved and the hydraulic pipeline to be actuated;
the reversing valve assembly comprises a first reversing valve arranged between the hydraulic actuating element to be energy-saved and the primary energy accumulator and a second reversing valve arranged between the primary energy accumulator and the secondary energy accumulator; the pressure sensor assembly comprises a first pressure sensor and a second pressure sensor which are respectively electrically connected with the controller;
the first pressure sensor is arranged on the primary energy accumulator and can measure first real-time pressure of the primary energy accumulator, and the controller is used for comparing the first real-time pressure with first preset pressure; when the first real-time pressure is smaller than the first preset pressure, the controller controls the first reversing valve to communicate the hydraulic actuating element to be energy-saving with the primary accumulator; when the first real-time pressure reaches the first preset pressure, the controller controls the first reversing valve to disconnect the hydraulic actuating element to be energy-saving and the primary accumulator;
the second pressure sensor is arranged on the secondary accumulator and can measure a second real-time pressure of the secondary accumulator, and the controller is further used for comparing the second real-time pressure with a second preset pressure; when the second real-time pressure is lower than the second preset pressure, the controller controls the second reversing valve to communicate the primary accumulator with the secondary accumulator, and when the second real-time pressure reaches the second preset pressure, the controller controls the second reversing valve to disconnect the primary accumulator from the secondary accumulator.
In any of the foregoing technical solutions, optionally, the hydraulic energy storage circuit further includes a first relief valve, the first relief valve is communicated with the primary energy accumulator, and a set pressure of the first relief valve is greater than the first predetermined pressure.
In any of the above technical solutions, optionally, the hydraulic energy storage circuit further includes a second overflow valve, the second overflow valve may be communicated with the secondary energy accumulator, and the set pressure of the second overflow valve is greater than the second predetermined pressure.
In any of the above technical solutions, optionally, the second reversing valve is a two-position four-way reversing valve;
when the second reversing valve is located at the first position, the second reversing valve is communicated with the primary accumulator and the secondary accumulator, and the second overflow valve can not be communicated with the secondary accumulator;
when the second reversing valve is located at a second position, the second reversing valve enables the primary energy accumulator and the secondary energy accumulator to be disconnected and communicated, and enables the second overflow valve to be communicated with the secondary energy accumulator.
In any of the above technical solutions, optionally, a check valve is disposed between the primary accumulator and the hydraulic actuator to be energy-saved, and the check valve only allows one-way flow of the hydraulic medium from the hydraulic actuator to be energy-saved to the primary accumulator.
In any of the above technical solutions, optionally, the first direction valve and the second direction valve are both electromagnetic direction valves.
Based on the second objective, the invention provides a construction machine, which includes the hydraulic energy storage circuit provided by any one of the above technical solutions.
In any of the above technical solutions, optionally, the construction machine further includes a boom driven by the hydraulic actuator to be energy-saved of the hydraulic energy storage circuit and a breaking hammer driven by the hydraulic pipe to be actuated of the hydraulic energy storage circuit.
In any of the above technical solutions, optionally, the construction machine further includes a display disposed in the cab, the display is electrically connected to the controller of the hydraulic energy storage circuit, and the display can display real-time data of the hydraulic energy storage circuit.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention provides a hydraulic energy storage circuit which comprises an energy storage assembly, a reversing valve assembly, a pressure sensor assembly and a controller. The controller controls the energy accumulator assembly to be communicated or disconnected with the hydraulic actuating element to be energy-saving according to the real-time pressure of the energy accumulator assembly detected by the pressure sensor assembly, and the energy accumulator assembly accumulates the hydraulic energy recovered by the hydraulic actuating element to be energy-saving in a communicated state or suspends the accumulation of the hydraulic energy to avoid overhigh working pressure of the energy accumulator assembly and the hydraulic pipeline to be actuated in a disconnected and communicated state. Therefore, the hydraulic energy storage loop not only can continuously supplement hydraulic energy to the hydraulic pipeline to be actuated, reduce the oil consumption of the hydraulic pipeline to be actuated and improve the working efficiency of a second device driven by the hydraulic pipeline to be actuated, but also can automatically maintain the real-time pressure of the energy storage assembly in a reasonable range, and ensure the safety of the hydraulic energy storage loop and a downstream oil circuit.
The engineering machine provided by the invention comprises the hydraulic energy storage circuit, so that all the beneficial effects of the hydraulic energy storage circuit can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram illustrating a first state of a hydraulic accumulator circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydraulic accumulator circuit according to an embodiment of the present invention in a second state;
FIG. 3 is a schematic diagram illustrating a third state of a hydraulic accumulator circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a fourth state of the hydraulic accumulator circuit according to an embodiment of the present invention;
fig. 5 is a control schematic diagram of a hydraulic accumulator circuit according to an embodiment of the present invention.
Icon: 1-a hydraulic energy storage circuit; 10-hydraulic actuating element to be energy-saving; 11-primary accumulator; 12-a secondary accumulator; 13-a first direction valve; 14-a second directional valve; 15-a first pressure sensor; 16-a second pressure sensor; 17-a controller; 18-a first relief valve; 19-a second relief valve; 20-hydraulic lines to be actuated; 21-display.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1 to 5, the present embodiment provides a hydraulic accumulator circuit; FIG. 1 is a schematic diagram of a first state of a hydraulic accumulator circuit provided in accordance with the present embodiment, wherein the first directional control valve and the second directional control valve are both in a first position; FIG. 2 is a schematic diagram of a second state of the hydraulic accumulator circuit provided in the present embodiment, in which the first direction valve is in the first position and the second direction valve is in the second position; FIG. 3 is a schematic diagram of a third state of the hydraulic accumulator circuit provided in the present embodiment, in which the first direction valve is in the second position and the second direction valve is in the first position; FIG. 4 is a schematic diagram illustrating a fourth state of the hydraulic accumulator circuit in accordance with the present embodiment, wherein the first direction valve and the second direction valve are both in the second position; fig. 5 is a control schematic diagram of the controller of the hydraulic accumulator circuit according to the present embodiment.
The hydraulic energy storage circuit provided by the embodiment is used for the engineering machinery. The hydraulic energy storage loop is used for communicating a hydraulic actuating element to be saved and a hydraulic pipeline to be actuated of the engineering machinery, so that the recovered and accumulated hydraulic energy of the hydraulic actuating element to be saved is transmitted to the hydraulic pipeline to be actuated.
Referring to fig. 1-5, the present embodiment provides a hydraulic accumulator circuit 1 including an accumulator assembly, a reversing valve assembly, a pressure sensor assembly and a controller 17.
The inlet of the accumulator assembly is used for communicating the hydraulic actuating element 10 to be saved through the reversing valve assembly, and the outlet of the accumulator assembly is used for communicating the hydraulic pipeline 20 to be actuated. The hydraulic actuator 10 to be energy-saved may be a hydraulic actuator for driving a first device of the construction machine to move, usually, mechanical energy generated by the first device in a certain movement process may be converted into hydraulic energy in the hydraulic actuator 10 to be energy-saved, a key component energy accumulator assembly in the hydraulic energy storage circuit 1 may store the hydraulic energy and deliver the stored hydraulic energy to the hydraulic pipeline 20 to be actuated, and the hydraulic pipeline 20 to be actuated may perform a useful function to the outside by using a second device driven by the hydraulic energy, so as to effectively reduce a waste phenomenon of the hydraulic energy, and achieve an energy-saving effect.
Alternatively, the mechanical energy recovered by the hydraulic actuator 10 to be saved may be braking energy of a vehicle, gravitational potential energy of a boom, braking energy of a turntable, and the like.
Alternatively, the hydraulic actuator 10 to be saved may be a hydraulic cylinder or a motor, etc.
The working principle of the hydraulic energy storage circuit 1 is as follows:
the pressure sensor assembly is disposed on the accumulator assembly and measures a real-time pressure of the accumulator assembly. The pressure sensor assembly is electrically connected to the controller 17 and is capable of communicating with each other, the pressure sensor assembly transmitting the measured real-time pressure of the accumulator assembly to the controller 17. The controller 17 can control the motion of the reversing valve assembly according to the real-time pressure, and specifically, after the controller 17 compares and analyzes the real-time pressure, whether the reversing valve assembly needs to be transposed or not and how to transpose the reversing valve assembly are judged. Firstly, under the condition that the reversing valve assembly is controlled to enable the energy accumulator assembly to be communicated with the hydraulic actuating element 10 to be energy-saving, the energy accumulator assembly starts to accumulate hydraulic energy recovered by the hydraulic actuating element 10 to be energy-saving so as to ensure that the energy accumulator assembly has enough hydraulic medium to be supplemented to a hydraulic pipeline 20 to be actuated and ensure that a transmission path for reusing the recovered hydraulic energy is smooth; secondly, in the case of controlling the reversing valve assembly to disconnect the accumulator assembly from the hydraulic actuator 10 to be economized, the accumulator assembly suspends accumulation of the hydraulic energy recovered by the hydraulic actuator 10 to be economized, so as to avoid accumulation of an excessive amount of hydraulic medium, thereby ensuring safe use of the accumulator assembly and the downstream hydraulic line 20 to be actuated.
Optionally, the pressure sensor assembly transmits real-time pressure to the controller 17 in real-time or timed.
The hydraulic accumulator circuit 1 in this embodiment includes an accumulator assembly, a reversing valve assembly, a pressure sensor assembly and a controller 17. The controller 17 controls the accumulator assembly to be communicated with or disconnected from the hydraulic actuator 10 to be energy-saved according to the real-time pressure of the accumulator assembly detected by the pressure sensor assembly, and the accumulator assembly accumulates the hydraulic energy recovered by the hydraulic actuator 10 to be energy-saved in a communicated state or suspends the accumulation of the hydraulic energy in a disconnected state so as to avoid overhigh working pressure of the accumulator assembly and the hydraulic pipeline 20 to be actuated. Therefore, the hydraulic energy storage circuit 1 not only can continuously supplement hydraulic energy to the hydraulic pipeline 20 to be actuated, reduce the oil consumption of the hydraulic pipeline 20 to be actuated and improve the working efficiency of a second device driven by the hydraulic pipeline 20 to be actuated, but also can automatically maintain the real-time pressure of an energy accumulator assembly in a reasonable range, thereby ensuring the safety of the hydraulic energy storage circuit 1 and a downstream oil circuit.
In an alternative of the present embodiment, the accumulator assembly comprises a primary accumulator 11 and a secondary accumulator 12 which are in series communication between the hydraulic actuator 10 to be economized and the hydraulic line 20 to be actuated.
The reversing valve component comprises a first reversing valve 13 arranged between the hydraulic actuating element 10 to be energy-saving and the primary energy accumulator 11 and a second reversing valve 14 arranged between the primary energy accumulator 11 and the secondary energy accumulator 12; the pressure sensor assembly includes first and second pressure sensors 15 and 16, respectively, electrically connected to a controller 17, the first and second pressure sensors 15 and 16 being capable of communicating with the controller 17.
The first pressure sensor 15 is disposed on the primary accumulator 11 and is capable of measuring a first real-time pressure of the primary accumulator 11, and sending the first real-time pressure to the controller 17, and the controller 17 compares the first real-time pressure with a first predetermined pressure, where the first predetermined pressure is a highest working pressure of the primary accumulator 11.
Referring to fig. 1, when the first real-time pressure is smaller than the first predetermined pressure, it indicates that the working pressure in the primary accumulator 11 has not yet reached the maximum working pressure, and therefore the controller 17 controls the first directional valve 13 to communicate the hydraulic actuator 10 to be energy-saved with the primary accumulator 11, so as to ensure that the recovered hydraulic energy is timely supplemented and accumulated in the primary accumulator 11, thereby improving the energy storage and supply efficiency of the primary accumulator 11. Referring to fig. 3, when the first real-time pressure reaches the first predetermined pressure, which indicates that the working pressure in the primary accumulator 11 has reached the maximum working pressure, the controller 17 controls the first direction valve 13 to disconnect the energy-saving hydraulic actuator 10 from the primary accumulator 11, so as to cut off the transmission path of the recovered hydraulic energy to the primary accumulator 11, and avoid the working pressure of the primary accumulator 11 from being too high.
The second pressure sensor 16 is disposed on the secondary accumulator 12 and is capable of measuring a second real-time pressure of the secondary accumulator 12 and sending the second real-time pressure to the controller 17, and the controller 17 is further configured to compare the second real-time pressure with a second predetermined pressure, where the second predetermined pressure is a maximum working pressure of the secondary accumulator 12.
When the second real-time pressure is lower than the second predetermined pressure, which indicates that the working pressure of the secondary energy accumulator 12 has not yet reached the maximum working pressure, the controller 17 controls the second directional valve 14 to communicate the primary energy accumulator 11 and the secondary energy accumulator 12, so as to ensure that the hydraulic energy accumulated in the primary energy accumulator 11 can be timely supplemented into the secondary energy accumulator 12, and improve the energy storage and supply efficiency of the secondary energy accumulator 12. When the second real-time pressure reaches the second predetermined pressure, which indicates that the working pressure of the secondary accumulator 12 has reached the maximum working pressure, the controller 17 controls the second directional valve 14 to disconnect the primary accumulator 11 from the secondary accumulator 12, thereby cutting off the path for transmitting the hydraulic energy accumulated in the primary accumulator 11 to the secondary accumulator 12 and preventing the working pressure of the secondary accumulator 12 from being too high.
Optionally, the first direction valve 13 and the second direction valve 14 are both electromagnetic direction valves, so as to be connected with the controller 17 in a communication manner, and the controller 17 controls the position change thereof.
The primary energy accumulator 11 and the secondary energy accumulator 12 are used in cooperation, wherein the primary energy accumulator 11 is used as a transfer energy storage component of the whole hydraulic energy storage circuit 1, so that the energy storage limit of the hydraulic energy storage circuit 1 is improved, a stable hydraulic energy supply source is provided for the secondary energy accumulator 12, the secondary energy accumulator 12 is used as a direct energy storage component for supplying hydraulic energy to the hydraulic pipeline 20 to be actuated, and a stable hydraulic energy supply source can be provided for the hydraulic pipeline 20 to be actuated, so that the working pressure of the hydraulic pipeline 20 to be actuated can be stably and continuously improved, and the oil consumption of the hydraulic pipeline 20 to be actuated can be reduced. Further, the first pressure sensor 15, the first direction valve 13, the second pressure sensor 16 and the second direction valve 14 are used in cooperation, so that the use safety of the primary accumulator 11 and the secondary accumulator 12 can be ensured respectively.
In an alternative of this embodiment, the hydraulic accumulator circuit 1 further includes a first relief valve 18, the first relief valve 18 is communicated with the primary accumulator 11, and the set pressure of the first relief valve 18 is greater than the first predetermined pressure. When the working pressure in the primary accumulator 11 is greater than the first predetermined pressure, that is, the maximum working pressure, the first relief valve 18 is opened to allow part of the medium in the primary accumulator 11 to be relieved to the tank through the first relief valve 18, until the pressure in the primary accumulator 11 is not greater than the first predetermined pressure, the first relief valve 18 is closed, and thus the first relief valve 18 plays a role in protecting the primary accumulator 11.
In an alternative of this embodiment, the hydraulic accumulator circuit 1 further comprises a second relief valve 19, the second relief valve 19 being capable of communicating with the secondary accumulator 12, the set pressure of the second relief valve 19 being greater than the second predetermined pressure. When the second relief valve 19 is communicated with the secondary accumulator 12 and the working pressure in the secondary accumulator 12 is greater than the second predetermined pressure, that is, the maximum working pressure, the second relief valve 19 is opened to allow part of the medium in the secondary accumulator 12 to be relieved through the second relief valve 19 until the pressure in the secondary accumulator 12 is not greater than the second predetermined pressure, so that the second relief valve 19 plays a role in protecting the secondary accumulator 12.
In an alternative version of this embodiment, the second reversing valve 14 is a two-position, four-way reversing valve.
Referring to fig. 1 and 3, when the second directional control valve 14 is in the first position, the second directional control valve 14 communicates the primary accumulator 11 with the secondary accumulator 12, and when the working pressure of the secondary accumulator 12 is lower than a second predetermined pressure, the primary accumulator 11 is able to charge the secondary accumulator 12 with hydraulic medium. Meanwhile, the second reversing valve 14 disconnects the second overflow valve 19 and the secondary accumulator 12, if the pressure in the secondary accumulator 12 is too high, on one hand, the primary accumulator 11 can reversely absorb the hydraulic impact in the secondary accumulator 12 to form primary protection for the secondary accumulator 12, and on the other hand, the primary accumulator 11 and the secondary accumulator 12 can share the first overflow valve 18 as a safety valve to form secondary protection for the secondary accumulator 12.
As shown in fig. 2 and 4, when the second direction changing valve 14 is in the second position, the second direction changing valve 14 disconnects the primary accumulator 11 from the secondary accumulator 12, and at this time, the working pressure of the secondary accumulator 12 reaches the second predetermined pressure, and since neither the primary accumulator 11 nor the first relief valve 18 is connected to the secondary accumulator 12, the secondary accumulator 12 cannot be protected. Meanwhile, the second overflow valve 19 is communicated with the secondary accumulator 12, and if the pressure in the secondary accumulator 12 is too high, the secondary accumulator 12 can be protected by the second overflow valve 19.
Through setting up this second switching-over valve 14, can avoid first overflow valve 18 and second overflow valve 19 to communicate the condition emergence of secondary accumulator 12 simultaneously to avoid opening first overflow valve 18 and second overflow valve 19 simultaneously and cause the instantaneous a large amount of losses of hydraulic energy in hydraulic energy storage return circuit 1, and then under the prerequisite that provides the protection for secondary accumulator 12 all the time, still improve the effective utilization ratio of the hydraulic energy that hydraulic energy storage return circuit 1 impounds.
In an alternative of this embodiment, a non-return valve is provided between the primary accumulator 11 and the hydraulic actuator 10 to be economized, which non-return valve only allows a one-way passage of medium from the hydraulic actuator 10 to be economized to the primary accumulator 11. The hydraulic actuator 10 to be energy-saving can be effectively prevented from being impacted by the continuous hydraulic energy in the hydraulic energy storage circuit 1 in the reverse direction by arranging the one-way valve.
Example two
The second embodiment provides a working machine, the second embodiment comprises the hydraulic energy storage circuit in the first embodiment, the technical characteristics of the hydraulic energy storage circuit disclosed in the first embodiment are also applicable to the second embodiment, and the technical characteristics of the hydraulic energy storage circuit disclosed in the first embodiment are not repeatedly described.
The working machine in this embodiment has the advantages of the hydraulic accumulator circuit in the first embodiment, and the advantages of the hydraulic accumulator circuit disclosed in the first embodiment will not be described again.
In an alternative to the embodiment shown in fig. 1 to 5, the working machine further comprises a boom driven by the hydraulic actuator 10 to be economized of the hydraulic accumulator circuit 1 and a breaking hammer driven by the hydraulic line 20 to be actuated of the hydraulic accumulator circuit 1. Specifically, the hydraulic actuator 10 to be saved is a hydraulic cylinder for driving a boom to move. Therefore, the engineering machine recovers the gravitational potential energy of the movable arm through the hydraulic execution element 10 to be energy-saving and converts the gravitational potential energy into hydraulic energy, the energy accumulator assembly accumulates the hydraulic energy and drives the breaking hammer to act through the hydraulic pipeline 20 to be actuated, namely, the gravitational potential energy of the movable arm is recovered and accumulated, an additional energy source is provided for the breaking hammer energy accumulator, and the breaking hammer power source is prevented from being too single.
In an alternative of this embodiment, the construction machine further includes a display 21 disposed in the cab, the display 21 is electrically connected to the controller 17, and the display 21 is capable of displaying real-time data of the hydraulic accumulator circuit 1, and specifically, values of the reversing valve assembly, the accumulator assembly and the pressure sensor assembly can be retrieved and viewed through the display 21.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (9)
1. A hydraulic accumulator circuit (1) comprising an accumulator assembly, a reversing valve assembly, a pressure sensor assembly and a controller (17);
the inlet of the accumulator assembly is used for communicating a hydraulic actuator (10) to be saved through the reversing valve assembly, and the outlet of the accumulator assembly is used for communicating a hydraulic pipeline (20) to be actuated;
the pressure sensor assembly is arranged on the energy accumulator assembly and can measure the real-time pressure of the energy accumulator assembly;
the controller (17) is electrically connected with the pressure sensor assembly, and the controller (17) can control the reversing valve assembly to act according to the real-time pressure so as to enable the accumulator assembly to be communicated or disconnected with the hydraulic actuating element (10) to be energy-saving; the accumulator component comprises a primary accumulator (11) and a secondary accumulator (12) which are sequentially communicated between the hydraulic actuating element (10) to be saved and the hydraulic pipeline (20) to be actuated;
the reversing valve assembly comprises a first reversing valve (13) arranged between the hydraulic actuating element (10) to be energy-saving and the primary accumulator (11) and a second reversing valve (14) arranged between the primary accumulator (11) and the secondary accumulator (12); the pressure sensor assembly comprises a first pressure sensor (15) and a second pressure sensor (16) which are respectively electrically connected with the controller (17);
the first pressure sensor (15) is arranged on the primary accumulator (11) and can measure a first real-time pressure of the primary accumulator (11), and the controller (17) is used for comparing the first real-time pressure with a first preset pressure; when the first real-time pressure is smaller than the first preset pressure, the controller (17) controls the first reversing valve (13) to communicate the hydraulic actuating element (10) to be energy-saving with the primary accumulator (11); when the first real-time pressure reaches the first preset pressure, the controller (17) controls the first reversing valve (13) to disconnect the hydraulic actuating element (10) to be energy-saving from the primary accumulator (11);
the second pressure sensor (16) is arranged on the secondary accumulator (12) and can measure a second real-time pressure of the secondary accumulator (12), and the controller (17) is also used for comparing the second real-time pressure with a second preset pressure; when the second real-time pressure is less than the second preset pressure, the controller (17) controls the second reversing valve (14) to communicate the primary accumulator (11) with the secondary accumulator (12), and when the second real-time pressure reaches the second preset pressure, the controller (17) controls the second reversing valve (14) to disconnect the primary accumulator (11) from the secondary accumulator (12).
2. The hydraulic charging circuit (1) of claim 1, further comprising a first relief valve (18), said first relief valve (18) being in communication with said primary accumulator (11), said first relief valve (18) having a set pressure greater than said first predetermined pressure.
3. The hydraulic charging circuit (1) according to claim 2, characterized by further comprising a second relief valve (19), said second relief valve (19) being able to communicate with said secondary accumulator (12), said set pressure of said second relief valve (19) being greater than said second predetermined pressure.
4. The hydraulic accumulator circuit (1) according to claim 3, characterized in that the second reversal valve (14) is a two-position, four-way reversal valve;
when the second reversing valve (14) is located at the first position, the second reversing valve (14) is communicated with the primary accumulator (11) and the secondary accumulator (12), and the second overflow valve (19) can not be communicated with the secondary accumulator (12);
when the second reversing valve (14) is located at a second position, the second reversing valve (14) enables the primary accumulator (11) and the secondary accumulator (12) to be disconnected from each other, and enables the second overflow valve (19) to be communicated with the secondary accumulator (12).
5. The hydraulic accumulator circuit (1) according to claim 1, characterized in that a non-return valve is provided between the primary accumulator (11) and the hydraulic actuator (10) to be economized, which non-return valve only allows a non-return flow of hydraulic medium from the hydraulic actuator (10) to be economized to the primary accumulator (11).
6. The hydraulic accumulator circuit (1) according to claim 1, characterized in that the first direction valve (13) and the second direction valve (14) are both electromagnetic direction valves.
7. A working machine, characterized in that it comprises a hydraulic accumulator circuit (1) according to any one of claims 1-6.
8. A working machine according to claim 7, characterized by a boom driven by a hydraulic actuator (10) to be economized of the hydraulic accumulator circuit (1) and a breaking hammer driven by a hydraulic line (20) to be actuated of the hydraulic accumulator circuit (1).
9. A working machine according to claim 8, characterized by further comprising a display (21) arranged in the cab, said display (21) being electrically connected to the controller (17) of the hydraulic charging circuit (1), said display (21) being capable of displaying real-time data of the hydraulic charging circuit (1).
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