CN210949311U - Real-time recovery and utilization system for winch potential energy - Google Patents
Real-time recovery and utilization system for winch potential energy Download PDFInfo
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- CN210949311U CN210949311U CN201921361965.8U CN201921361965U CN210949311U CN 210949311 U CN210949311 U CN 210949311U CN 201921361965 U CN201921361965 U CN 201921361965U CN 210949311 U CN210949311 U CN 210949311U
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Abstract
The utility model discloses a real-time recovery and utilization system of hoisting potential energy, which comprises a main pump, an auxiliary pump, a reversing main valve, a potential energy recovery reversing valve and a balance valve group; the main pump is connected to an oil inlet and an oil outlet of the winch motor through a reversing main valve, the balance valve group is arranged between the oil inlet and the oil outlet of the winch motor, an oil return path is led out from an outlet of a balance valve of the balance valve group, and the oil return path is connected with an oil return port of the reversing main valve and a pressure oil port of the auxiliary pump through a potential energy recovery reversing valve; the secondary pump adopts a secondary element pump/motor which is coaxially driven with the primary pump. The utility model discloses stably transfer the potential energy that the stage real-time recycle load was transferred at the hoist, make the engine work of drive main pump in the state of zero power or low power output, realize the real-time recovery of hoist potential and recycle, have outstanding energy-conserving effect, the hydraulic system that specially adapted engineering machine used single engine to take the many pumps does not need too much increase hydraulic system's cost.
Description
Technical Field
The utility model belongs to hoist hydraulic pressure technique, concretely relates to real-time recycle system of hoist potential energy.
Background
The engineering machinery is mostly provided with a high-power internal combustion engine, the oil consumption is high, the exhaust emission volume is huge, so the pollution of the exhaust emission to the air is more and more inconspicuous, the research of the energy-saving control technology of the engineering machinery is enhanced based on the consideration of the national energy safety and the air pollution control, and the vigorous popularization and application of the energy-saving technology are not slow enough. The engineering machinery hoisting system is mainly used for lifting and lowering heavy objects, not only is gravitational potential energy released by the heavy objects lost in a heat form in the lowering process of the hoisting system at the present stage, but also extra power is required to be provided by a hydraulic system to push the hoisting to be lowered, and as shown in fig. 1, extra control power in the lowering process of the hoisting is controlled by arranging an auxiliary pump. Therefore, the comprehensive energy-saving control research of the engineering machinery hoisting device has great practical significance.
At present, the energy-saving technology of engineering machinery winches mainly adopts the following modes.
1. Lowering confluence oil return regeneration hydraulic system for winch
The system utilizes the principle of differential connection of a hydraulic system, oil at the outlet of a winch motor directly flows back to the inlet of the motor and forms differential connection with oil supplement in a main oil circuit, the lowering speed of the winch is controlled by a pilot hydraulic control throttling speed regulating valve block at the outlet of the winch motor, an engine does not need to do work on a winch loop in the lowering process of the winch, part of fuel consumption can be saved compared with a common winch system, but the gravitational potential energy released by lowering a heavy object is not recycled by the system, so that the energy-saving effect of the system is not maximized.
2. Winch energy-saving system adopting energy recovery and reutilization
The winch hydraulic system can convert mechanical energy released when a heavy object is placed into other forms of energy for storage, and releases the stored energy into the hydraulic system under other working conditions, so that the power output of a main pump is effectively reduced, and the fuel consumption of an engine is reduced. At present, a hoisting energy recovery system mainly adopts two forms of hydraulic energy storage and electric energy storage.
In the energy recovery system in the form of hydraulic energy storage, when the recovered energy is large, the working volume of the energy accumulator is huge, the structural design of engineering machinery is inconvenient, and the pressure in the energy accumulator can be increased along with the increase of the charged oil, so that the constant-speed descending of the winch is difficult to control, and therefore the system does not well solve two difficulties in the energy-saving control of the main winch system.
In the energy recovery system stored in the form of electric energy, the energy recovery and utilization mode has many conversion links, the system structure is complex, the control difficulty is high, and a super capacitor with high energy density and small occupied space is required to be adopted for energy storage during huge energy recovery.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be: aiming at the defects of the existing energy-saving technology of the hoisting device, the system for recycling the hoisting potential energy in real time is provided.
The utility model discloses a following technical scheme realizes:
a real-time recovery and utilization system for hoisting potential energy comprises a main pump, an auxiliary pump, a reversing main valve, a potential energy recovery reversing valve and a balance valve group;
the main pump is connected to an oil inlet and an oil outlet of the winch motor through a reversing main valve, the balance valve group is arranged between the oil inlet and the oil outlet of the winch motor, an oil return path is led out from an outlet of a balance valve of the balance valve group, and the oil return path is connected with an oil return port of the reversing main valve and a pressure oil port of the auxiliary pump through a potential energy recovery reversing valve;
the secondary pump adopts a secondary element pump/motor which is coaxially driven with the primary pump.
Furthermore, a one-way valve for preventing backflow is arranged between the balance valve group and the potential energy recovery reversing valve.
Furthermore, a working oil way is connected in parallel with the pressure oil port of the auxiliary pump, and a check valve for preventing backflow is arranged between the working oil way of the auxiliary pump and the potential energy recovery reversing valve.
Furthermore, a one-way valve for preventing backflow is arranged between the potential energy recovery reversing valve and the reversing main valve.
Furthermore, the oil return path is also connected with an overflow valve in parallel to return the oil tank.
Furthermore, an energy accumulator is arranged on an oil way between the oil return way and the overflow valve.
Further, the balance valve group comprises a pressure reducing valve, a shuttle valve, a balance valve and an overload protection valve which are arranged in an integrated mode.
The utility model discloses an among the real-time recycle system of hoist potential energy, the switching-over main valve includes two work positions that change the hoist motor and advance the oily direction of play and cuts the stop position of main pump pressure oil at least.
Furthermore, the potential energy recovery reversing valve at least comprises two working positions for changing the circulation direction of the oil way and a stop position for cutting off the return oil.
The utility model also discloses a control method of the real-time recycle system of hoist potential energy, adopt the utility model discloses a real-time recycle system of hoist potential energy, concrete control step is as follows:
step 1, initializing a system, including initializing the rotating speed N1 of a hoisting motor, the displacement V2 of an auxiliary pump, reversing a main valve opening degree signal, overflow valve opening degree signals of a main pump and the auxiliary pump, and setting the allowable working rotating speed N1 range of the hoisting motor and the displacement V2 range of the auxiliary pump;
and 7, ending the lowering of the winch, closing the reversing main valve, and ending the potential energy recycling and real-time utilization process of the lowering of the winch.
The utility model provides a potential energy real-time recycle system is transferred to hoist, utilize hoist below in-process load effect to produce pressure in hydraulic system, when not increasing the engineering machine tool and making the degree of difficulty and economic nature problem, utilize this pressure oil direct reflux to the auxiliary pump, convert the auxiliary pump into the motor and come the operation of auxiliary drive main pump, real-time recycle has transferred in-process gravitational potential energy with the hoist, specially adapted engineering machine tool uses the hydraulic system of single engine area multi-pump, do not need too much to increase hydraulic system's cost, and the pipe connection is simpler reliable, the potential energy obtains real-time recycle, energy-conserving effect is obvious.
To sum up, adopt the utility model discloses can stably transfer the potential energy that the stage real-time recycle load was transferred at the hoist, make the engine work in the state of zero power or low power output, realize the real-time recovery of hoist potential and recycle, have outstanding energy-conserving effect.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic diagram illustrating a hydraulic control of a hoisting machine of a construction machine in the prior art.
Fig. 2 is a schematic diagram of a system for recycling hoisting potential energy in real time in an embodiment.
Fig. 3 is a hydraulic oil circuit diagram of the winch potential energy real-time recycling system in the embodiment when the winch is lifted.
Fig. 4 is a hydraulic oil loop diagram of the real-time recovery and utilization system for potential energy of the winch in the embodiment when the winch is lowered, and potential energy below the winch is not recovered at this time.
Fig. 5 is a hydraulic oil loop diagram of the real-time potential energy recycling system for the winch in the embodiment, which is used for recycling potential energy in real time when the winch is lowered.
Fig. 6 is a control flow chart of the hoisting potential energy real-time recycling system in the embodiment.
1-an engine; 2-main pump; 3-main pump overflow valve; 4-a reversing main valve; 5-a pressure reducing valve; 6-shuttle valve; 7-a pilot operated balancing valve; 8-a hoisting motor; 9-overload protection valve; 11. 14, 16-one-way valves; 12-an accumulator; 13-a potential energy recovery reversing valve; 15-electric proportional relief valve; 17-secondary pump relief valve; 18-auxiliary pump.
Detailed Description
Examples
Referring to fig. 2, the system for recycling the hoisting potential energy in real time in the figure is a specific embodiment of the present invention, which comprises an engine 1, a main pump 2, a main pump overflow valve 3, a reversing main valve 4, a pressure reducing valve 5, a shuttle valve 6, a pilot type balance valve 7, a hoisting motor 8, an overload protection valve 9, a check valve 11/13/16, an accumulator 12, a potential energy recycling reversing valve 13, an electric proportional overflow valve 15, an auxiliary pump overflow valve 17 and an auxiliary pump 18.
The main pump 2 and the auxiliary pump 18 are in coaxial transmission through the engine 1, the coaxial transmission refers to synchronous transmission of the main pump 2 and the auxiliary pump 18 through an output shaft of the engine 1, wherein the main pump 2 controls the hoisting motor 8 to lift up and put down, the auxiliary pump 18 serves as other hydraulic auxiliary systems to provide pressure oil, the main pump 2 and the auxiliary pump 18 are respectively provided with a main pump overflow valve 3 and an auxiliary pump overflow valve 17, the auxiliary pump 18 adopts a secondary element pump/motor and can be switched between the pump and the motor, the pressure oil is output to the auxiliary systems when serving as the pump, return oil pressure generated when the hoisting motor is put down is received and converted into mechanical energy to drive the main pump 2 together with the engine when serving as the motor, and real-time recycling of potential energy generated when the hoisting is put down.
As shown in fig. 2, the output pressure oil port of the main pump 2 is connected to the oil inlet path and the oil outlet path of the hoist motor 8 through the reversing main valve 4, when the reversing main valve 4 is controlled to communicate the output pressure oil port of the main pump and the oil inlet path of the hoist motor, the hoist motor 8 is lifted by hoisting, and when the reversing main valve 4 is controlled to communicate the output pressure oil port of the main pump and the oil outlet path of the hoist motor, the hoist motor 8 is reversed to be lowered. The reversing main valve 4 in the figure is a three-position four-way reversing valve and comprises an oil inlet P, an oil return port T and a working oil port A, B which is respectively connected with an oil inlet path and an oil outlet path of the winch motor 8, and the three working positions respectively correspond to a working position for communicating the main pump and the oil inlet path of the winch motor when the winch rises, a working position for communicating the main pump and the oil outlet path of the winch motor when the winch descends and a stopping position for stopping pressure oil of the main pump. The balanced valves sets up between the oil inlet way and the oil outlet way of hoist motor 8, including the relief pressure valve 5, shuttle valve 6, guide formula balanced valve 7 and the overload protection valve 9 of integrated setting, the balanced valves purpose of hoist motor makes the hoist motor more gentle with transferring switching process system pressure transform lifting, for the technical means that current hoist equipment was used commonly, this embodiment is not repeated its balanced oil circuit here.
In this embodiment, an oil return path is led out from the outlet of the balance valve group, and the oil return path is connected with the oil return port of the reversing main valve 4 and the pressure oil port of the auxiliary pump 18 through the potential energy recovery reversing valve 13, so that the oil return pressure utilization in the winch lowering process is realized. The potential energy recovery reversing valve 13 in the figure is a three-position four-way electromagnetic reversing valve and comprises an oil inlet P, an oil return port T and a working oil port A, B which is respectively connected to the reversing main valve 4 and the auxiliary pump 18, the three working positions comprise two working positions and a stopping position, the stopping position corresponds to a winch lifting process and cuts off an oil return path, and the oil return path is switched between two states of communicating the oil return path to the reversing main valve 4 and communicating the oil return path to the auxiliary pump 18 for potential energy recovery through the two working positions of the potential energy recovery reversing valve.
In order to avoid the influence of oil return on normal working oil paths of the main pump and the auxiliary pump, the oil return path adopts a one-way oil path and is only used when the winch motor is placed down in the working process. Specifically, a check valve 11 for preventing backflow is arranged between a balance valve outlet T of the balance valve group and a port P of the potential energy recovery reversing valve 13, a working oil port B of the potential energy recovery reversing valve 13 is connected to a pressure oil port P of the auxiliary pump 18 and is connected in parallel with a working oil path of the auxiliary pump 18, a check valve 14 for preventing backflow is arranged between the working oil path of the auxiliary pump 18 and the working oil port B of the potential energy recovery reversing valve 13, and a check valve 16 for preventing backflow is arranged on an oil path connected between the working oil port a of the potential energy recovery reversing valve 13 and the working oil port B of the reversing main valve 4.
In addition, the oil return path led out from the outlet T of the balance valve group flows back to the oil tank through the electric proportional overflow valve 15 connected in parallel, the energy accumulator 12 is arranged on the oil path between the oil return path and the electric proportional overflow valve 15, the oil return pressure is adjusted through the electric proportional overflow valve 15, a certain oil return back pressure is provided through the energy accumulator 12, and the stability of lowering the winch is improved.
The embodiment enables the winch to have a common working mode and a winch lowering potential energy real-time recycling working mode in the working process of the winch.
As shown in fig. 3, in the normal operation mode, the main coil is lifted up, the pilot handle controlling the reversing main valve 4 is operated, the pilot oil is controlled to enter the pilot port a of the reversing main valve 4, the pilot oil pushes the valve core of the reversing main valve 4 to move, the pressure oil provided by the main pump 2 flows into the port B from the port P of the reversing main valve 4, flows into the oil inlet path of the hoist motor 8 through the port a of the balance valve group, drives the hoist motor to lift up, at this time, the pressure oil at the port a of the balance valve group flows to the shuttle valve 6, flows into the brake cylinder of the hoist motor 8 from the port Br through the pressure reducing valve 5, the hoist brake is opened, the motor return oil flows out from the port B of the balance valve group through the oil outlet path, enters the port a of the reversing main valve 4, directly returns.
As shown in fig. 4, in the normal operation mode, the main coil is lowered, the electromagnet Y1 of the potential energy recovery reversing valve 13 is controlled to be powered on, the pilot handle of the reversing main valve 4 is operated, the pilot oil is controlled to enter the pilot port B of the reversing main valve 4, the pilot oil pushes the valve core of the reversing main valve 4 to move, the pressure oil provided by the main pump 2 flows into the port a from the port P of the reversing main valve 4, flows into the oil outlet path of the motor through the port B of the balance valve group, drives the winch motor to rotate reversely and lower, at this time, the pressure oil at the port B of the balance valve group flows to the shuttle valve 6, flows into the brake cylinder of the winch motor 8 from the port Br through the pressure reducing valve 5, the winch brake is opened, and the pressure oil at the port B of the balance valve group pushes the valve core of the pilot balance valve 7 to move, the motor return oil flows out from the port T of the pilot balance valve 7 through, then flows out from the port A of the potential energy recovery reversing valve 13, enters the port B of the reversing main valve 4 through the one-way valve 16, and directly returns to the oil tank from the port T of the reversing main valve 4, so that the winch is lowered in the common working mode.
As shown in fig. 5, in the working mode of recovering and utilizing the lowering potential energy of the winch in real time, the electromagnet Y1 of the potential energy recovery reversing valve 13 is controlled to be powered on, the pilot handle of the reversing main valve 4 is operated and controlled, the pilot oil enters the pilot port B of the reversing main valve 4, the pilot oil pushes the valve core of the reversing main valve 4 to move, the pressure oil provided by the main pump 2 flows into the port a from the port P of the reversing main valve 4, flows into the oil outlet path of the motor through the port B of the balancing valve group, drives the winch motor to rotate reversely and lower, at this time, the pressure oil at the port B of the balancing valve group partially flows to the shuttle valve 6, enters the brake cylinder of the winch motor 8 from the port Br through the pressure reducing valve 5, the winch brake is opened, and the pressure oil at the port B of the. At the moment, the downward weight applies work to the winch motor, the gravitational potential energy released by the downward weight is converted into the pressure energy of hydraulic oil to enable the oil pressure to rise, the pressure oil enters the port P of the potential energy recovery reversing valve 13 through the one-way valve 11 through the outlet T of the pilot type balance valve 7 and flows out of the port B of the potential energy recovery reversing valve 13 through the one-way valve 14 to the auxiliary pump 18, the auxiliary pump 18 is switched to the working condition of the motor under the action of a variable mechanism of the auxiliary pump 18 at the moment, the auxiliary pump 18 converts the hydraulic energy into mechanical energy and transmits the mechanical energy to the engine 1 and the main pump 2, and after external power is input to the engine 1, the electronic control oil injection system automatically reduces or stops oil injection.
When the lowering is started, the displacement of the auxiliary pump 18 adopting a secondary element pump/motor is smaller, the energy accumulator 12 on the oil return path can store certain potential energy to provide certain oil return back pressure to improve the lowering stability of the winch, after the lowering speed of the winch reaches a preset value, the auxiliary pump 18 starts to stably work under the working condition of the motor as the input torque of the engine, at the moment, the energy accumulator can also continuously store a part of redundant energy, after the lowering is finished, the energy accumulator 12 is electrified through an electromagnet Y2 of the potential energy recovery reversing valve 13, pressure oil in the energy accumulator 12 enters a port P of the potential energy recovery reversing valve 13 through the oil return path, flows out from a port B and enters a working oil path of the auxiliary pump, certain hydraulic energy can be provided for an auxiliary system controlled by the auxiliary pump, and the comprehensive work of oil consumption is reduced by further utilizing the potential energy collected in the lowering process of the winch.
In order to ensure that the energy-saving system for recovering potential energy discharged by the hoisting equipment of the engineering machinery in real time and utilizing the energy-saving capacity has good operation performance on the premise of high energy-saving performance, the whole system needs to be controlled through electric control, and the specific control flow is shown in fig. 6.
Step 1, initializing a system, including initializing the rotating speed N1 of a winch motor 8, the displacement V2 of an auxiliary pump 18, an opening degree signal of a reversing main valve 4, and opening degree signals of overflow valves of a main pump 2 and the auxiliary pump 18, and setting the allowable working rotating speed N1 range of the winch motor 8 and the displacement V2 range of the auxiliary pump 18;
and 7, ending the lowering of the winch, closing the reversing main valve 4, and ending the potential energy recycling and real-time utilization process of the lowering of the winch.
The control and monitoring of each signal can be realized by an electric control system equipped for the engineering machinery, and the specific control implementation mode is not described herein.
The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (9)
1. The utility model provides a hoist potential energy recycle system in real time which characterized in that: the system comprises a main pump, an auxiliary pump, a reversing main valve, a potential energy recovery reversing valve and a balance valve group;
the main pump is connected to an oil inlet and an oil outlet of the winch motor through a reversing main valve, the balance valve group is arranged between the oil inlet and the oil outlet of the winch motor, an oil return path is led out from an outlet of a balance valve of the balance valve group, and the oil return path is connected with an oil return port of the reversing main valve and a pressure oil port of the auxiliary pump through a potential energy recovery reversing valve;
the secondary pump adopts a secondary element pump/motor which is coaxially driven with the primary pump.
2. The hoisting potential energy real-time recycling system according to claim 1, characterized in that: and a one-way valve for preventing backflow is arranged between the balance valve group and the potential energy recovery reversing valve.
3. The hoisting potential energy real-time recycling system according to claim 2, characterized in that: and a working oil way is also connected in parallel with the pressure oil port of the auxiliary pump, and a check valve for preventing backflow is arranged between the working oil way of the auxiliary pump and the potential energy recovery reversing valve.
4. The hoisting potential energy real-time recycling system according to claim 3, characterized in that: and a one-way valve for preventing backflow is arranged between the potential energy recovery reversing valve and the reversing main valve.
5. The hoisting potential energy real-time recycling system according to claim 1, characterized in that: and the oil return path also returns to the oil tank through a parallel overflow valve.
6. The hoisting potential energy real-time recycling system according to claim 5, characterized in that: and an energy accumulator is arranged on an oil way between the oil return way and the overflow valve.
7. The hoisting potential energy real-time recycling system according to claim 1, characterized in that: the balance valve group comprises a pressure reducing valve, a shuttle valve, a balance valve and an overload protection valve which are arranged in an integrated mode.
8. The hoisting potential energy real-time recycling system according to any one of claims 1 to 7, characterized in that: the reversing main valve at least comprises two working positions for changing the oil inlet and outlet directions of the winch motor and a stopping position for stopping the pressure oil of the main pump.
9. The hoisting potential energy real-time recycling system according to claim 8, characterized in that: the potential energy recovery reversing valve at least comprises two working positions for changing the circulation direction of the oil way and a stop position for cutting off the return oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921361965.8U CN210949311U (en) | 2019-08-21 | 2019-08-21 | Real-time recovery and utilization system for winch potential energy |
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| CN201921361965.8U CN210949311U (en) | 2019-08-21 | 2019-08-21 | Real-time recovery and utilization system for winch potential energy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374940A (en) * | 2019-08-21 | 2019-10-25 | 山河智能装备股份有限公司 | A kind of real-time recycling system of elevator potential energy and its control method |
| WO2023050780A1 (en) * | 2021-09-30 | 2023-04-06 | 三一汽车起重机械有限公司 | Energy consumption method and apparatus, and work machine |
-
2019
- 2019-08-21 CN CN201921361965.8U patent/CN210949311U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374940A (en) * | 2019-08-21 | 2019-10-25 | 山河智能装备股份有限公司 | A kind of real-time recycling system of elevator potential energy and its control method |
| WO2021031639A1 (en) * | 2019-08-21 | 2021-02-25 | 山河智能装备股份有限公司 | Winch potential energy real-time recycling system and control method therefor |
| WO2023050780A1 (en) * | 2021-09-30 | 2023-04-06 | 三一汽车起重机械有限公司 | Energy consumption method and apparatus, and work machine |
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