CN105545884A - Energy recovery system for hydraulic excavator - Google Patents
Energy recovery system for hydraulic excavator Download PDFInfo
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- CN105545884A CN105545884A CN201510389518.3A CN201510389518A CN105545884A CN 105545884 A CN105545884 A CN 105545884A CN 201510389518 A CN201510389518 A CN 201510389518A CN 105545884 A CN105545884 A CN 105545884A
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Abstract
The invention discloses an energy recovery system for a hydraulic excavator. The energy recovery system comprises an oil tank, a variable pump, a main control valve, a main control oil cylinder, two auxiliary control oil cylinders and a rotary motor. The energy recovery system further comprises an energy accumulator and a handle control valve group. The energy storage device is added in the system, the potential energy when a movable arm descends and the rotary braking potential energy are recovered to be stored in the energy storage device. When the movable arm is lifted, the energy stored in the energy storage device is released for assisting the movable arm to ascend; when rotating is started, the energy stored in the energy storage device is released for assisting rotating to be started; energy sources can be reused, energy consumption is reduced, and less heat is emitted.
Description
Technical field
The invention belongs to engineering machinery hydraulic transmission field, be specifically related to a kind of hydraulic shovel energy-recuperation system.
Background technique
Hydraulic shovel is a kind of widely used engineering machinery, equipment weight accounts for complete machine weight 1/4, and in excavator operation process, each work cycle wants lifting and decline one action device, need a large amount of energy during lifting, potential energy during decline wastes again.Same in each work cycle swivel gear to carry out startups shut-down operation, because excavator weight of getting on the bus accounts for 2/3 of complete machine, start the energy that needs are very large, during formulation, also need very large energy.Rotary motor by self relief valve overflow decay get on the bus rotate inertia energy, get on the bus rotate stop gradually.But brake in this process in overflow, a large amount of high-voltage oil liquid flows back to fuel tank, causes energy flow to become estranged heating, has just wasted for the energy braked.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of hydraulic shovel energy-recuperation system, the potential energy that swing arm can be declined and the inertia potential energy of rotary braking are recycled, and the energy is utilized again, reaches the object reducing energy consumption.
For achieving the above object, the technical solution used in the present invention is: a kind of hydraulic shovel energy-recuperation system, comprises fuel tank, variable displacement pump, main control valve, main control oil cylinder, two auxiliary control oil cylinders and rotary motor, also comprises accumulator and handle control valve group,
The hydraulic oil that described variable displacement pump exports from fuel tank is connected with the large chamber of three loculuses and main control oil cylinder controlling oil cylinder through the swing arm spool of main control valve, and the auxiliary large chamber controlling oil cylinder connects an accumulator;
Two hydraulic fluid ports one-way valve C1, C2 in rotation energy changing valve of described rotary motor are connected with A2, B2 mouth of rotation energy changing valve, the P2 mouth of rotation energy changing valve connects another accumulator, A1, B1 mouth of rotation energy changing valve is connected with rotary motor A, B mouth with after rotary valve key A, B mouth parallel connection of main control valve, formation system working connection, realizes the function of the recovery of high-voltage oil liquid, storage and release;
Described main control valve rotary valve key xa1, xb1 mouth is connected with pilot-actuated valve I, pilot-actuated valve II and rotation energy changing valve respectively by the rotary handle in handle control valve group, pilot-actuated valve I, II is connected with the MP mouth of rotation energy changing valve, form guide's oil circuit, for controlling action and the logical relation of each valve block.
Further, described main control valve is multiple directional control valve.
Further, described main control valve also comprises charge and discharge energy spool, when energy-storage system underpressure, digging machine self can be utilized to fill energy.
Further, the swing arm spool of described main control valve adopts flow regeneration function, to ensure that swing arm reaches relevant criterion fall time.
Further, monologue story-telling with gestures main control valve is also provided with relief valve, for control system pressure.
Further, described main control valve also comprises flow control valve, for providing signal, and adjustment variable displacement pump output flow.
Further, described energy storage apparatus is piston accumulator.
Further, described handle control valve group also comprises swing arm handle and charge and discharge energy handle.
The controlling functions that above whole system can reclaim at machinery rotation process implementation, store, discharges.
The invention has the beneficial effects as follows: in this system, add energy storage apparatus, the potential energy decline swing arm and the potential energy of rotary braking reclaim, be stored in energy storage apparatus, the auxiliary swing arm that used by the fault offset stored in energy storage apparatus when moved arm lifting rises, when turning round and starting, the fault offset stored in energy storage apparatus is out used for auxiliary revolution to start, the energy can be made again to utilize, reduce energy consumption, reduce heating.
This system Hydraulic Excavator's Boom adopts three cylinder structures, two side cylinders are actuating cylinder, middle oil cylinder is auxiliary cylinder, the loculus oil-feed simultaneously of three oil cylinders when swing arm declines, the actuating cylinder oil return of both sides, the middle large chamber of auxiliary cylinder is connected with accumulator, and accumulator adopts piston accumulator, because Volume Changes stores energy; When swing arm rises, the large chamber oil-feed of both sides actuating cylinder, the power assist swing arm that the large chamber of middle auxiliary cylinder utilizes accumulator to reclaim rises, and can realize reducing installed power and energy-efficient effect.
In order to the safety action time, have employed spool regeneration function when swing arm declines, can ensure that swing arm reaches relevant criterion fall time, be provided with in systems in which simultaneously and rush energy threshold, when energy-storage system underpressure, digging machine self can be utilized to fill energy.
During this system rotary braking, the high-voltage oil liquid of spill losses is originally collected by the recovery connection of rotation energy changing valve and is stored in accumulator, and when machinery starts again, joined by the release of rotation energy changing valve, by the fault offset of storage in order to drive upper-part rotation.
Be provided with accumulator pilot-actuated valve in systems in which simultaneously, the energy is discharged in variable displacement pump by the energy priority stored in accumulator, and revolution makeup energy got involved by controlled variable pump before accumulator energy discharges completely.Effectively can realize the recovery and reuse to rotary system braking energy source, reach reduction energy consumption, reduce effect of heating.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
In figure: 1-fuel tank, 2-variable displacement pump, 3-main control valve, 3.1-flow control valve, 3.2-swing arm spool, 3.3-charge and discharge energy spool, 3.4-rotary valve key, the main relief valve of 3.5-, 4-stop valve, 5-accumulator, 6-main control oil cylinder, 7-is auxiliary controls oil cylinder, 8-rotation energy changing valve, 8.1-fault offset joins, 8.2-energy regenerating joins, and 9-pilot-actuated valve I, 10-arrives first control valve II, 11-rotary motor, 12-accumulator, 13-handle control valve group, 13.1-swing arm handle, 13.2-charge and discharge energy handle, 13.3-rotary handle.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
As shown in the figure: a kind of hydraulic shovel energy-recuperation system, comprise fuel tank 1, variable displacement pump 2, main control valve 3, main control oil cylinder 6, two auxiliary control oil cylinder 7 and rotary motor 11, also comprise accumulator 5,12 and handle control valve group 13,
The hydraulic oil that described variable displacement pump 2 exports from fuel tank 1 is connected with the large chamber of three loculuses and main control oil cylinder 6 controlling oil cylinder through the swing arm spool of main control valve 3, and the auxiliary large chamber controlling oil cylinder 7 connects an accumulator 5;
Two hydraulic fluid ports one-way valve C1, C2 in rotation energy changing valve 8 of described rotary motor 11 are connected with A2, B2 mouth of rotation energy changing valve 8, the P2 mouth of rotation energy changing valve 8 connects another accumulator 12, A1, B1 mouth of rotation energy changing valve 8 is connected with rotary motor A, B mouth with after rotary valve key A, B mouth parallel connection of main control valve 3, formation system working connection, realizes the function of the recovery of high-voltage oil liquid, storage and release;
Described main control valve 3 rotary valve key xa1, xb1 mouth is connected with pilot-actuated valve I 9, pilot-actuated valve II 10 and rotation energy changing valve 8 respectively by the rotary handle in handle control valve group 13, pilot-actuated valve 9,10 is connected with the MP mouth of rotation energy changing valve 8, form guide's oil circuit, for controlling action and the logical relation of each valve block.
Working principle of the present invention is as follows:
1, the accumulation of energy process of swing arm decline: when the swing arm handle 13.1 of Joystick control valve group 13, the swing arm spool 3.2 that pilot pressure xb3 promotes main control valve 3 moves right, the hydraulic oil that variable displacement pump 2 exports, be input to the loculus of three oil cylinders through the swing arm spool 3.2B mouth of main control valve 3, oil cylinder moves down, the large chamber oil return of main control oil cylinder 6, the auxiliary large chamber controlling oil cylinder 7 is connected with accumulator 5, smaller volume, pressure raises, and energy stores.Because be three oil cylinder loculuses fuel feeding simultaneously, for ensureing swing arm rate of descent, main control valve 3 is provided with flow control valve 3.1, plays flow regeneration function to the swing arm spool 3.2 of main control valve 3.
2, the exergonic process of swing arm rising: when Joystick control valve group 13 swing arm handle 13.1, the swing arm spool 3.2 that pilot pressure xa3 promotes main control valve 3 is moved to the left, the hydraulic oil that variable displacement pump 2 exports, through the swing arm spool 3.2A mouth of main control valve 3 to the large chamber of main control oil cylinder 6, the loculus oil return of three oil cylinders, the auxiliary large chamber controlling oil cylinder 7 is connected with accumulator 5, due to the pressure effect of pressurized gas stored, promotion oil cylinder stretches out, auxiliary acting, gas volume becomes large simultaneously, and pressure reduces, fault offset.
3, swing arm accumulator fills exergonic process: energy-storage system use for the first time or because of the reason build-up of pressure such as leakage decline time, first stop valve 4 is opened, the swing arm spool 3.2 handling main control valve 3 moves right, the hydraulic oil that variable displacement pump 2 exports, the hydraulic oil side of accumulator 5 is input to through the charge and discharge energy spool 3.3 of main control valve 3, after reaching setting pressure, charge and discharge energy spool 3.3 times metas of main control valve 3, close stop valve 4, fill and can terminate.Exergonic process in contrast, opens stop valve 4, and the charge and discharge energy spool 3.3 of main control valve 3 moves to left, pressure oil oil sump tank, and pressure reduces, and close stop valve 4, exoergic terminates.
4, accumulation of energy process is turned round: accumulation of energy process occurs when mechanical braking, originally the high-voltage oil liquid flowing back to fuel tank when rotary motor 11 is braked flows to the energy regenerating connection 8.2 of rotation energy changing valve 8 through one-way valve C1, C2, high-voltage oil liquid is stored in accumulator 12 by the energy regenerating connection 8.2 of rotation energy changing valve 8.Whole process is without additional control, if when storage pressure exceedes the rated pressure of accumulator 12, safety effect is played in relief valve action.
5, exergonic process: exergonic process is when mechanically activated, by the earth pressure release in accumulator, now pilot-actuated valve I, II is in preferential operating state because of the pressure effect of accumulator 12, when rotary handle 13.3 in operator's control handle control valve group 13, the preferential and rotation energy changing valve 8 of guide's oil circuit is connected, control fault offset connection 8.1 and join 8.2 actions with energy regenerating, rotary motor 10 rotates, accumulator 12 pressure starts to reduce, and when accumulator 12 pressure drops to setting value, the preferential action of pilot-actuated valve I, II is removed.Rotary valve key 3.4 in guide's oil circuit and main control valve 3 is connected, and main control valve 3 action provides follow-up energy for motor 10 rotates, and makes mechanical smooth rotation.
The foregoing is only the preferred embodiment of invention, is not the restriction to invention.The change that those of ordinary skill in the art makes in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to the protection domain of invention.
Claims (8)
1. a hydraulic shovel energy-recuperation system, comprises fuel tank, variable displacement pump, main control valve, main control oil cylinder, two auxiliary control oil cylinders and rotary motor, also comprises accumulator and handle control valve group, it is characterized in that:
The hydraulic oil that described variable displacement pump exports from fuel tank is connected with the large chamber of three loculuses and main control oil cylinder controlling oil cylinder through the swing arm spool of main control valve, and the auxiliary large chamber controlling oil cylinder connects an accumulator;
Two hydraulic fluid ports one-way valve C1, C2 in rotation energy changing valve of described rotary motor are connected with A2, B2 mouth of rotation energy changing valve, the P2 mouth of rotation energy changing valve connects another accumulator, A1, B1 mouth of rotation energy changing valve is connected with rotary motor A, B mouth with after rotary valve key A, B mouth parallel connection of main control valve, formation system working connection, realizes the recovery of high-voltage oil liquid, storage and release function;
Described main control valve rotary valve key xa1, xb1 mouth is connected with pilot-actuated valve I, pilot-actuated valve II and rotation energy changing valve respectively by the rotary handle in handle control valve group, pilot-actuated valve I, II is connected with the MP mouth of rotation energy changing valve, form guide's oil circuit, for controlling action and the logical relation of each valve block.
2. hydraulic shovel energy-recuperation system according to claim 1, is characterized in that: described main control valve is multiple directional control valve.
3. hydraulic shovel energy-recuperation system according to claim 2, is characterized in that: described main control valve also comprises charge and discharge energy spool.
4. hydraulic shovel energy-recuperation system according to claim 2, is characterized in that; The swing arm spool of described main control valve adopts flow regeneration function.
5. hydraulic shovel energy-recuperation system according to claim 2, is characterized in that: described main control valve is also provided with relief valve, for control system pressure.
6. the hydraulic shovel energy-recuperation system according to any one of claim 2 to 5, is characterized in that; Described main control valve also comprises flow control valve, for providing signal, and adjustment variable displacement pump output flow.
7. hydraulic shovel energy-recuperation system according to claim 1, is characterized in that; Described energy storage apparatus is piston accumulator.
8. hydraulic shovel energy-recuperation system according to claim 1, is characterized in that: described handle control valve group also comprises swing arm handle and charge and discharge energy handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389518.3A CN105545884A (en) | 2015-07-06 | 2015-07-06 | Energy recovery system for hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389518.3A CN105545884A (en) | 2015-07-06 | 2015-07-06 | Energy recovery system for hydraulic excavator |
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| CN105545884A true CN105545884A (en) | 2016-05-04 |
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| CN201510389518.3A Pending CN105545884A (en) | 2015-07-06 | 2015-07-06 | Energy recovery system for hydraulic excavator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061430A (en) * | 2017-04-10 | 2017-08-18 | 太原理工大学 | The hoisting system of minus flow hydraulic circuit control |
| CN107061427A (en) * | 2017-01-12 | 2017-08-18 | 临沭县精伦液压件销售有限公司 | A kind of engineering machinery large arm potential energy is reclaimed and release system |
| CN107687453A (en) * | 2017-09-15 | 2018-02-13 | 太原理工大学 | Loading machine action potential recycling system |
| CN107700576A (en) * | 2017-09-15 | 2018-02-16 | 太原理工大学 | Hydraulic crawler excavator action potential recycling system |
-
2015
- 2015-07-06 CN CN201510389518.3A patent/CN105545884A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061427A (en) * | 2017-01-12 | 2017-08-18 | 临沭县精伦液压件销售有限公司 | A kind of engineering machinery large arm potential energy is reclaimed and release system |
| CN107061430A (en) * | 2017-04-10 | 2017-08-18 | 太原理工大学 | The hoisting system of minus flow hydraulic circuit control |
| CN107061430B (en) * | 2017-04-10 | 2018-08-10 | 太原理工大学 | The hoisting system of minus flow hydraulic circuit control |
| CN107687453A (en) * | 2017-09-15 | 2018-02-13 | 太原理工大学 | Loading machine action potential recycling system |
| CN107700576A (en) * | 2017-09-15 | 2018-02-16 | 太原理工大学 | Hydraulic crawler excavator action potential recycling system |
| CN107687453B (en) * | 2017-09-15 | 2019-05-03 | 太原理工大学 | Loading machine action potential recycling system |
| CN107700576B (en) * | 2017-09-15 | 2020-01-07 | 太原理工大学 | Kinetic potential energy recycling system of hydraulic excavator |
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