CN204266287U - A kind of digger revolving brake energy recovering system - Google Patents

A kind of digger revolving brake energy recovering system Download PDF

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Publication number
CN204266287U
CN204266287U CN201420702611.6U CN201420702611U CN204266287U CN 204266287 U CN204266287 U CN 204266287U CN 201420702611 U CN201420702611 U CN 201420702611U CN 204266287 U CN204266287 U CN 204266287U
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valve
hydraulic
pressure sensor
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electro
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张树忠
江吉彬
练国富
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Fujian University of Technology
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Fujian University of Technology
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Abstract

The utility model provides a kind of digger revolving brake energy recovering system, and described system comprises hydraulic accumulator, ECU control unit, variable pump, control valve assembly, pressure sensor assembly and rotary motor; The motor of described excavator is connected with described variable pump, and described ECU control unit is by control valve assembly hydraulic control accumulator, variable pump, rotary motor respectively; Described ECU control unit gathers the pressure of hydraulic accumulator, pilot valve, rotary motor respectively by pressure sensor assembly; Described rotary motor drives the turntable of described excavator, and the utility model realizes the recovery and reuse of digger revolving braking energy; Thus reach energy-conservation object.

Description

A kind of digger revolving brake energy recovering system
Technical field
The utility model relates to the energy-saving field of hydraulic crawler excavator, particularly relates to a kind of digger revolving brake energy recovering system.
Background technology
At present, the research of energy regenerating mainly concentrates on automotive field, engineering machinery field especially hydraulic crawler excavator energy regenerating research be also in the starting stage, and general super capacitor or the battery of adopting is as energy-storage travelling wave tube, although both at home and abroad excavator product rotary system have employed counnter attack rotary valve, braking procedure hydraulic shock and motor reversal development still more serious.And the method for traditional improvement digger revolving Braking system performance has larger limitation, as reduced reversal valve responsiveness by influential system operating efficiency; Reduce safety valve setting oil pressure relief and will have a strong impact on excavator operation safety.
Hydraulic crawler excavator consumption is large and oil consumption maximum discharge is poor, and the total energy utilization rate of conventional hydraulic excavator is only about 20%, and the efficiency of hydraulic system is about 30%, and this is one of main reason of hydraulic crawler excavator inefficiency.The slew gear frequent starting braking of hydraulic excavating machine turn table, and turntable inertia is all larger, can discharge a large amount of energy during retarding braking, 25% ~ 40% of the whole exemplary operation circulation of energy ezpenditure point.Braking energy scatters and disappears mainly with form of thermal energy, causes the heating of Control in Hydraulic Rotation System, reduces the service behaviour of slew gear, causes the loss of energy comparatively large, more can the working life of influential system.In addition, owing to easily producing hydraulic shock and rotary motor reversal development when hydraulic crawler excavator rotary system is braked, had a strong impact on excavator application life operator comfortableness and the sense of security.If this part energy regenerating can be used, prevent hydraulic shock when braking and turntable reversion simultaneously, not only have certain economic worth at excavator energy-saving square mask, and effectively can extend the life-span of its hydraulic system, improve the service behaviour of system.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of digger revolving brake energy recovering system, realizes the recovery and reuse of digger revolving braking energy; Thus reach energy-conservation object.
The utility model is achieved in that a kind of digger revolving brake energy recovering system, and described system comprises hydraulic accumulator, ECU control unit, variable pump, control valve assembly, pressure sensor assembly and rotary motor; The motor of described excavator is connected with described variable pump, and described ECU control unit is by control valve assembly hydraulic control accumulator, variable pump, rotary motor respectively; Described ECU control unit gathers hydraulic accumulator, rotary motor pressure respectively by pressure sensor assembly; Described rotary motor drives the turntable of described excavator.
Further, described system also comprises a pilot valve, one first electro-hydraulic reversing valve and one second electro-hydraulic reversing valve, described control valve assembly comprises: the first one way valve, the second one way valve, the 3rd one way valve, the 4th one way valve, the 5th one way valve, the 6th one way valve, the 7th one way valve, the 8th one way valve, the first overflow valve, the second overflow valve, the 3rd overflow valve and banked direction control valves, described pressure sensor assembly comprises: the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, described motor driven variable pump, the fuel tank of motor is connected with the import of variable pump, and variable delivery side of pump connects the import of the first one way valve, the outlet of the first one way valve all with the first import of banked direction control valves, the outlet of the second one way valve, the import of the first overflow valve is connected, the outlet of the first overflow valve, second import of banked direction control valves is all connected with fuel tank, the first hydraulic control mouth of banked direction control valves all with the first pressure sensor, pilot valve is connected, the second hydraulic control mouth of banked direction control valves respectively with the second pressure sensor, pilot valve is connected, the first outlet of banked direction control valves respectively with the import of the 3rd one way valve, the hydraulic control mouth of the 4th one way valve is connected, the second outlet of banked direction control valves all with the import of the 4th one way valve, the hydraulic control mouth of the 3rd one way valve is connected, the outlet of the 3rd one way valve respectively with rotary motor import, 5th one-way valved outlet, 6th check valve inlet is connected, and the outlet of the 4th one way valve exports with rotary motor respectively, 7th one-way valved outlet, 8th check valve inlet is connected, the 5th check valve inlet, 7th check valve inlet is all connected with fuel tank, the 6th one-way valved outlet, 8th one-way valved outlet, first electro-hydraulic reversing valve import is all connected with the second overflow valve import, and the second overflow valve outlet is connected with fuel tank, and the first electro-hydraulic reversing valve first exports and connects hydraulic accumulator respectively, 3rd pressure sensor, 3rd overflow valve import, second electro-hydraulic reversing valve import, the first electro-hydraulic reversing valve second exports and connects fuel tank, and the 3rd overflow valve outlet connects fuel tank, the second electro-hydraulic reversing valve outlet connection second check valve inlet, ECU control unit controls mouth be connected with the first pressure sensor, the second pressure sensor, the 3rd pressure sensor, the first electro-hydraulic reversing valve, the second electro-hydraulic reversing valve, variable pump respectively, described pilot valve is for controlling each valve in control valve assembly.
Further, described first electro-hydraulic reversing valve is three position three-way change valve, and the second electro-hydraulic reversing valve is bi-bit bi-pass reversal valve.
The utility model tool has the following advantages: 1. the utility model is on the basis of original digger revolving system, and by adding the transformation of corresponding Hydraulic Elements, structure is simple, reliable operation; The first electro-hydraulic reversing valve and the second electro-hydraulic reversing valve is controlled to realize the switching of common switchback mode and energy recuperation mode by ECU control unit.
2. Brake energy recovery during rotary braking is in accumulator; When revolution starts, the energy be recovered in accumulator can directly recycle in driving rotary motor; Because accumulator good reliability, power density are high, turntable Brake Energy can be reclaimed fast, and the form of recovering energy is hydraulic energy, reduces power conversion link, improve energy reuse ratio.
3. when turntable end of braking, by the first electro-hydraulic reversing valve or the second electro-hydraulic reversing valve, loading and unloading is unloaded to rotary motor high pressure chest, reduce hydraulic shock and prevent turntable from reversing.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the structural representation that the utility model is detailed.
Detailed description of the invention
Refer to shown in Fig. 1 and Fig. 2, a kind of digger revolving brake energy recovering system of the present utility model, described system comprises hydraulic accumulator 1, ECU control unit 2, variable pump 3, control valve assembly 4, rotary motor 5 and pressure sensor assembly 6; The motor 7 of described excavator (not shown) is connected with described variable pump 3, and described ECU control unit 2 is by control valve assembly 4 hydraulic control accumulator 1, variable pump 3, rotary motor 5 respectively; Described ECU control unit 2 gathers the pressure of hydraulic accumulator 1, pilot valve 81, rotary motor 5 respectively by pressure sensor assembly 5; Described rotary motor 5 drives the turntable 8 of described excavator; Described ECU control unit 2 gathers the signal that pressure sensor assembly 6 feeds back, thus control the break-make of control valve assembly 4, the inertia energy of the turntable 8 of excavator is converted into hydraulic energy to be stored in hydraulic accumulator 1, namely during braking, excavator rotary motor runs on pump condition, digger revolving Brake energy recovery is stored in hydraulic accumulator 1, next time releases energy when starting, by controlling the energy distribution of motor 7 and the major-minor power source of hydraulic accumulator 1, realize the recovery and reuse of digger revolving braking energy.When turntable 8 end of braking, control electro-hydraulic reversing valve by ECU control unit 2 and off-load is carried out to hydraulic motor high pressure chest, reduce hydraulic shock and prevent turntable from reversing.
Wherein, in the utility model, described system also comprises pilot valve 81,1 first electro-hydraulic reversing valve 9 and one second electro-hydraulic reversing valve 10, described control valve assembly 4 comprises: the first one way valve 41, second one way valve 42, the 3rd one way valve 43, the 4th one way valve 44, the 5th one way valve 45, the 6th one way valve 46, the 7th one way valve 47, the 8th one way valve 48, first overflow valve 49, second overflow valve 50, the 3rd overflow valve 51 and banked direction control valves 52, described pressure sensor assembly 6 comprises: the first pressure sensor 61, second pressure sensor 62 and the 3rd pressure sensor 63, described motor 7 drives variable pump 3, and the fuel tank 11 of motor is connected with the import of variable pump 3, and the outlet of variable pump 3 connects the import of the first one way valve 41, the outlet of the first one way valve 41 all with the first import of banked direction control valves 52, the outlet of the second one way valve 42, the import of the first overflow valve 49 is connected, the outlet of the first overflow valve 49, second import of banked direction control valves 52 is all connected with fuel tank 11, the first hydraulic control mouth of banked direction control valves 52 all with the first pressure sensor 61, pilot valve 81 is connected, the second hydraulic control mouth of banked direction control valves 52 respectively with the second pressure sensor 62, pilot valve 81 is connected, the first outlet of banked direction control valves 52 respectively with the import of the 3rd one way valve 43, the hydraulic control mouth of the 4th one way valve 44 is connected, the second outlet of banked direction control valves 52 all with the import of the 4th one way valve 44, the hydraulic control mouth of the 3rd one way valve 43 is connected, the outlet of the 3rd one way valve 43 respectively with rotary motor 5 import, 5th one way valve 45 exports, 6th one way valve 46 import is connected, and the outlet of the 4th one way valve 44 exports with rotary motor 5 respectively, 7th one way valve 47 exports, 8th one way valve 48 import is connected, the 5th one way valve 45 import, 7th one way valve 47 import is all connected with fuel tank, and the 6th one way valve 46 exports, 8th one way valve 48 exports, first electro-hydraulic reversing valve 9 import is all connected with the second overflow valve 50 import, and the second overflow valve 50 exports and is connected with fuel tank 11, and the first electro-hydraulic reversing valve 9 first exports and connects hydraulic accumulator 1 respectively, 3rd pressure sensor 63, 3rd overflow valve 51 import, second electro-hydraulic reversing valve 10 import, the first electro-hydraulic reversing valve 9 second exports connection fuel tank the 11, three overflow valve 51 outlet connection fuel tank 11, second electro-hydraulic reversing valve 10 and exports the import of connection second one way valve 42, ECU control unit 2 controls mouth be connected with the first pressure sensor 61, second pressure sensor 62, the 3rd pressure sensor 63, first electro-hydraulic reversing valve 9, second electro-hydraulic reversing valve 10, variable pump 3 respectively, described pilot valve 81 is for controlling each valve in control valve assembly 4,
Wherein, excavator carries out common switchback mode: ECU control unit 2 sends instruction, first electro-hydraulic reversing valve 9 and the second electro-hydraulic reversing valve 10 no power, banked direction control valves 52 is operated in left position, now variable pump 3 is for hydraulic oil, flow through the first one way valve 41, the first import of banked direction control valves 52, the 3rd one way valve 43, rotary motor 5, the 4th one way valve 44, banked direction control valves 52 second outlet, finally flow back to fuel tank 11, by the 5th one way valve 45 repairing during braking, prevent rotary motor 5 from absorbing air, carry out hydraulic braking by the second overflow valve 50; ECU control unit 2 sends instruction, the first electro-hydraulic reversing valve 9 and the second electro-hydraulic reversing valve 10 no power, and when banked direction control valves 52 is operated in right position, then hydraulic oil direction is contrary with left position;
Excavator carries out energy recuperation mode: energy regenerating and the energy recycling that reclaims when starting when comprising braking; Energy regenerating operating mode during braking: banked direction control valves 52 works in meta, second electro-hydraulic reversing valve 10 no power, the pressure reduction of the first pressure sensor 61 and the second pressure sensor 62 is 0, ECU control unit 2 sends instruction, first electro-hydraulic reversing valve 9 bottom energising, rotary motor 5 works in pump condition (working condition of pump), and hydraulic oil is flow to the first electro-hydraulic reversing valve 9 by the 6th one way valve 46 or the 8th one way valve 48, and be stored in hydraulic accumulator 1, realize the recovery of Brake Energy; When the pressure of the 3rd pressure sensor 63 no longer raises, show end of braking; The energy recycling operating mode reclaimed during startup: ECU control unit 2 sends instruction, makes the upper energising of the first electro-hydraulic reversing valve 9, now realizes the off-load of rotary motor 5 high pressure chest, prevent hydraulic shock and reversion.
Described first electro-hydraulic reversing valve 9 is three position three-way change valve, and the second electro-hydraulic reversing valve 10 is bi-bit bi-pass reversal valve.
In a word, the utility model is using hydraulic accumulator as energy-storage travelling wave tube, rotary motor/pump is as energy conversion component, the inertia energy of turntable is converted into hydraulic energy to be stored in accumulator, namely during braking, rotary motor runs on pump condition, is stored in accumulator by digger revolving Brake energy recovery, releases energy when next time starts, by controlling the energy distribution of motor and the major-minor power source of accumulator, realize the recovery and reuse of digger revolving braking energy; Thus reach energy-conservation object.
The foregoing is only preferred embodiment of the present utility model, all equalizations done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims (3)

1. a digger revolving brake energy recovering system, its feature is being: described system comprises hydraulic accumulator, ECU control unit, variable pump, control valve assembly, pressure sensor assembly and rotary motor; The motor of described excavator is connected with described variable pump, and described ECU control unit is by control valve assembly hydraulic control accumulator, variable pump, rotary motor respectively; Described ECU control unit gathers hydraulic accumulator, rotary motor pressure respectively by pressure sensor assembly; Described rotary motor drives the turntable of described excavator.
2. a kind of digger revolving brake energy recovering system according to claim 1, its feature is being: described system also comprises a pilot valve, one first electro-hydraulic reversing valve and one second electro-hydraulic reversing valve, described control valve assembly comprises: the first one way valve, the second one way valve, the 3rd one way valve, the 4th one way valve, the 5th one way valve, the 6th one way valve, the 7th one way valve, the 8th one way valve, the first overflow valve, the second overflow valve, the 3rd overflow valve and banked direction control valves, described pressure sensor assembly comprises: the first pressure sensor, the second pressure sensor and the 3rd pressure sensor, described motor driven variable pump, the fuel tank of motor is connected with the import of variable pump, and variable delivery side of pump connects the import of the first one way valve, the outlet of the first one way valve all with the first import of banked direction control valves, the outlet of the second one way valve, the import of the first overflow valve is connected, the outlet of the first overflow valve, second import of banked direction control valves is all connected with fuel tank, the first hydraulic control mouth of banked direction control valves all with the first pressure sensor, pilot valve is connected, the second hydraulic control mouth of banked direction control valves respectively with the second pressure sensor, pilot valve is connected, the first outlet of banked direction control valves respectively with the import of the 3rd one way valve, the hydraulic control mouth of the 4th one way valve is connected, the second outlet of banked direction control valves all with the import of the 4th one way valve, the hydraulic control mouth of the 3rd one way valve is connected, the outlet of the 3rd one way valve respectively with rotary motor import, 5th one-way valved outlet, 6th check valve inlet is connected, and the outlet of the 4th one way valve exports with rotary motor respectively, 7th one-way valved outlet, 8th check valve inlet is connected, the 5th check valve inlet, 7th check valve inlet is all connected with fuel tank, the 6th one-way valved outlet, 8th one-way valved outlet, first electro-hydraulic reversing valve import is all connected with the second overflow valve import, and the second overflow valve outlet is connected with fuel tank, and the first electro-hydraulic reversing valve first exports and connects hydraulic accumulator respectively, 3rd pressure sensor, 3rd overflow valve import, second electro-hydraulic reversing valve import, the first electro-hydraulic reversing valve second exports and connects fuel tank, and the 3rd overflow valve outlet connects fuel tank, the second electro-hydraulic reversing valve outlet connection second check valve inlet, ECU control unit controls mouth be connected with the first pressure sensor, the second pressure sensor, the 3rd pressure sensor, the first electro-hydraulic reversing valve, the second electro-hydraulic reversing valve, variable pump respectively, described pilot valve is for controlling each valve in control valve assembly.
3. a kind of digger revolving brake energy recovering system according to claim 2, its feature is being: described first electro-hydraulic reversing valve is three position three-way change valve, and the second electro-hydraulic reversing valve is bi-bit bi-pass reversal valve.
CN201420702611.6U 2014-11-20 2014-11-20 A kind of digger revolving brake energy recovering system Active CN204266287U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104372823A (en) * 2014-11-20 2015-02-25 福建工程学院 Recovering system for slewing and braking energy of excavator
CN106515424A (en) * 2016-11-11 2017-03-22 中国船舶重工集团公司第七0四研究所 Independent hydraulic drive system of automobile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104372823A (en) * 2014-11-20 2015-02-25 福建工程学院 Recovering system for slewing and braking energy of excavator
CN106515424A (en) * 2016-11-11 2017-03-22 中国船舶重工集团公司第七0四研究所 Independent hydraulic drive system of automobile
CN106515424B (en) * 2016-11-11 2019-06-28 中国船舶重工集团公司第七0四研究所 A kind of vehicle hydraulic independent driving system

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