CN106761760A - The power shovel lifting system of electro-hydraulic combination drive - Google Patents

The power shovel lifting system of electro-hydraulic combination drive Download PDF

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Publication number
CN106761760A
CN106761760A CN201610994441.7A CN201610994441A CN106761760A CN 106761760 A CN106761760 A CN 106761760A CN 201610994441 A CN201610994441 A CN 201610994441A CN 106761760 A CN106761760 A CN 106761760A
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CN
China
Prior art keywords
motor
hydraulic
lifting
pump
hydraulic pump
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CN201610994441.7A
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Chinese (zh)
Inventor
权龙�
王君
熊晓燕
程珩
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太原理工大学
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Priority to CN201610994441.7A priority Critical patent/CN106761760A/en
Publication of CN106761760A publication Critical patent/CN106761760A/en

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C47/00Machines for obtaining or the removal of materials in open-pit mines
    • E21C47/02Machines for obtaining or the removal of materials in open-pit mines for coal, brown coal, or the like

Abstract

The power shovel lifting system of electro-hydraulic combination drive, belongs to opencast mining Large-Scale Equipment field, and it includes scraper bowl, hoisting drum, decelerator, lifting motor, hydraulic pump/motor, accumulator group, overflow valve, frequency converter, DC/DC converters, super capacitor group;DC/DC converters are connected on the dc bus of lifting motor frequency converter, DC/DC converters are connected with super capacitor group, and hydraulic pump/motor is placed in the output end of any power transmission shaft between decelerator and lifting motor, and its hydraulic fluid port is connected with accumulator group.The electrical power storage that lifting motor is produced when the present invention can fall power shovel scraper bowl reduces the peak point current of excavator and mechanics in super capacitor group, improves its job stability.Power shovel scraper bowl gravitional force in dropping process is changed into hydraulic energy simultaneously to be stored in accumulator group, when scraper bowl is lifted, these energy will be utilized effectively, stand-by motor work reduces the installed power of power shovel lifting motor, improves power shovel operating efficiency.

Description

The power shovel lifting system of electro-hydraulic combination drive

Technical field

The invention belongs to opencast mining Large-Scale Equipment field, and in particular to a kind of power shovel lifting system of electro-hydraulic combination drive System.

Background technology

With the fast development of national economy, the energy industry especially Coal Industry Development of China encounters bottleneck how The tasks such as the energy-efficient Mining Transport for realizing coal become the theme of current Coal Industry Development.Power shovel is (also referred to as large-scale Mine mechanical face digger) dipper capacity it is big, job area is wide, and environmental suitability is strong, can bear larger vibration with Shock loading, functional reliability is high, and maintaining expense is low, is that the exploitation of large outdoors colliery, iron ore and nonferrous metals ore is peeled off One of capital equipment for pretending in industry is adopted with mineral.In surface mine discontinuous min ing technology and semi-continuousmining technology system, Power shovel be indispensable key adopt installing it is standby.But with the high speed development of external mining technique, China's mining industry is faced with Acid test, how in the case where production cost is reduced, is effectively improved in a kind of method for cleaning green outdoor The production efficiency of exploitation turns into current Coal Industrial urgent problem.

The Chinese invention patent publication number CN105089087 that State Patent Office announces for 2015, a kind of lifting system of power shovel System, discloses a kind of new power shovel lifting system, and when scraper bowl falls after rise, powering mode is converted to power generation mode by control system, shovel Bucket band movable reel reversion, drives internal motor to rotate and is generated electricity, and after rectified inversion, feeds back to power network or other electricity consumptions set It is standby.But due to random can be fed to power network in power shovel motion process, and the peak point current of lifting device is still very big, to electricity Net causes big rush of current harmony wave interference, have impact on the job stability and reliability of power shovel.

Equally, in a Chinese invention patent of State Patent Office's announcement in 2015, a kind of mine excavator hoisting mechanism, Publication No.:CN104555774A, discloses a kind of transmission device of new type mining excavator hoisting mechanism, optimizes hoisting mechanism Structure, start with and reach the purpose of energy-saving and emission-reduction in terms of hoisting mechanism deadweight is reduced, although portion can be reduced by loss of weight Divide energy consumption, the electric energy produced by power shovel lifting device is not made full use of but.

Above two power save mode does not reduce the installed power and peak point current of power shovel lifting motor, without fully profit yet Potential energy during being declined with power shovel.

The content of the invention

In order to save electric energy, the production efficiency of power shovel is improved, reduce the use cost of power shovel, the present invention devises a kind of electricity The power shovel lifting system of liquid combination drive.

Technical scheme:The power shovel lifting system of electro-hydraulic combination drive, it is characterized in that:In the lifting of existing power shovel Hydraulic pump/motor is set up in system, hydraulic pump/motor is placed in the output of any power transmission shaft between lifting motor and decelerator End, its hydraulic fluid port is connected with accumulator group, and the potential energy that scraper bowl falls is changed into hydraulic energy is stored in the middle of accumulator group, hydraulic pressure When pump/motor is in hydraulic pump works state, fluid is sucked in the middle of accumulator group;Hydraulic pump/motor is in motor operations shape During state, accumulator group can discharge energy, drive hydraulic pump/motor work;The dc bus and DC/ of lifting motor frequency converter DC converters are connected, and DC/DC converters are connected with super capacitor group, the electric energy produced during storage lifting motor generating state.

When power shovel scraper bowl falls, lifting motor is in generating state, and the DC bus-bar voltage in frequency converter is raised, and is passed through After DC/DC converters, super capacitor group is charged, meanwhile, hydraulic pump/motor is in pump work state, and fluid is sucked into accumulation of energy In the middle of device group, the transform gravitational energy that scraper bowl is fallen is stored in accumulator group for hydraulic energy.

When power shovel scraper bowl is lifted, lifting motor is in motoring condition, and the DC bus-bar voltage in frequency converter will not be raised, Super capacitor group, for lifting motor provides electric energy, aids in its work by after DC/DC converters, meanwhile, at hydraulic pump/motor In operation status of motor, the hydraulic energy release that will be stored in when falling in accumulator group, drive motor work, service hoisting motor work Make.

When not needing accumulator group back work, by the pivot angle regulation of hydraulic pump/motor to zero degree, i.e. hydraulic pump/motor Discharge capacity be zero, now hydraulic pump/motor idle running, be that lifting motor increased damping, improve the stabilization of power shovel lifting system Property.

Existing power shovel lifting system includes scraper bowl, hoisting drum, decelerator, lifting motor, high pressure accumulator group, overflow Valve, low pressure accumulator group, pressure sensor, check valve, slippage pump, repairing pump motor, frequency converter.

The electric shovel lifting mechanism of electro-hydraulic combination drive of the present invention has the following advantages:

The electrical power storage that lifting motor is produced when power shovel scraper bowl is fallen reduces the peak value of excavator and mechanics in super capacitor group Electric current, improves its job stability.Power shovel scraper bowl gravitional force in dropping process is changed into hydraulic energy is stored in accumulation of energy simultaneously In device group, when scraper bowl is lifted, these energy will be utilized effectively, stand-by motor work, reduce power shovel lifting motor Installed power, improves operating efficiency, reaches the purpose of environmental protection, while also improving the functional reliability and stabilization of power shovel Property.

Brief description of the drawings

Fig. 1 is the structural representation of the embodiment of the present invention 1;

Fig. 2 is the hydraulic control system figure of the embodiment of the present invention 2, containing only one group of accumulator, and has pressurized reservoir.

Fig. 3 is the hydraulic control system figure of the embodiment of the present invention 3, containing one by four 2/2-way proportional reversing valve groups Into ratio valve group.

In figure:1. scraper bowl;2:Hoisting drum;3:Decelerator;4:Lifting motor;5:Hydraulic pump/motor;6:High pressure accumulator Group;7:I overflow valves;8:Low pressure accumulator group;9:IIth overflow valve;10:Pressure sensor;11:Check valve, 12:Slippage pump; 13:Repairing pump motor;14:Frequency converter;15:DC/DC converters;16:Super capacitor group;17:Accumulator group;18:Overflow valve; 19:2/2-way solenoid directional control valve;20:Pressurized reservoir;21:2/2-way proportional reversing valve group.

Specific embodiment

Embodiment 1:Shown in Fig. 1, the power shovel lifting system of electro-hydraulic combination drive includes scraper bowl 1, hoisting drum 2, decelerator 3, lifting motor 4, hydraulic pump/motor 5, high pressure accumulator group 6, I overflow valves 7, low pressure accumulator group 8, the IIth overflow valve 9, Pressure sensor 10, check valve 11, slippage pump 12, repairing pump motor 13, frequency converter 14, DC/DC converters 15, super capacitor group 16.Hydraulic pump/motor 5 is placed on the output shaft of any power transmission shaft between decelerator and motor, as shown in Figure 1, dotted line Drawn hydraulic pump/motor outline drawing represents the position that can lay hydraulic pump/motor 5, if hydraulic pump/motor and lifting motor 4 It is joined directly together, then lifting motor 4 is double output shaft electric machines.DC/DC converters are connected on the dc bus of the frequency converter 14 of lifting motor 4 15, and DC/DC converters 15 are connected with super capacitor group 16;When hydraulic pump/motor 5 is in hydraulic pump works state, its suction Hydraulic fluid port is connected with low pressure accumulator group 8, and low pressure accumulator group 8 is connected with I overflow valves 7, its oil discharge outlet and high pressure accumulator group 6 Connection, high pressure accumulator group 6 is connected with the IIth overflow valve 9, and the oil discharge outlet of slippage pump 12 is connected with check valve 11.

When power shovel scraper bowl declines, lifting motor 4 is in generating state, and the DC bus-bar voltage in frequency converter 14 is raised, By DC/DC converters 15 for super capacitor group 16 charges, meanwhile, hydraulic pump/motor 5 is in pump work state, its inlet port It is connected with low pressure accumulator group 8, oil discharge outlet is connected with high pressure accumulator group 6, fluid is drawn into height from low pressure accumulator group 8 In pressure accumulator group 6, the transform gravitational energy that scraper bowl is fallen is stored in high pressure accumulator group 6 for hydraulic energy, if low pressure The pressure of accumulator group 8 reduction, pressure sensor detects this information, by controller repairing pump motor 13 can be controlled to work, Driving slippage pump 12 is system repairing.

When power shovel scraper bowl is lifted, lifting motor 4 is in motoring condition, and the DC bus-bar voltage in frequency converter 14 is constant, Super capacitor group 16 passes through DC/DC converters 15 for lifting motor 4 is powered, while hydraulic pump/motor 5 is in motor operations shape State, the energy release that high pressure accumulator group 6 will be stored, drives hydraulic pump/motor 5 to work, and service hoisting motor 4 works, and increases Its ability to work and efficiency.

If disconnecting the connection of hydraulic pump/motor 5 and power transmission shaft, only need to be by the pivot angle of hydraulic pump/motor regulation to zero Degree, i.e., flow is zero, and now, hydraulic pump/motor idle running increased the damping of lifting motor, improve the stability of system.

Explanation:The hydraulic pump/motor 5 of the present embodiment can be unidirectional pump/motor, or two-way pump/motor, may be used also It is used in parallel with multigroup pump/motor.

Embodiment 2:Shown in Fig. 2, the present embodiment is similar with the operation principle of embodiment 1, and difference is to eliminate slippage pump 12, Repairing pump motor 13, high pressure accumulator group 6 and I overflow valves 7, the overflow valve 9 of low pressure accumulator group 8 and the IIth increase by two two Electric change valve 19 and pressurized reservoir 20.

When power shovel scraper bowl falls, lifting motor 4 is in generating state, and the DC bus-bar voltage in frequency converter 14 is raised, By DC/DC converters 15 for super capacitor group 16 charges, meanwhile, hydraulic pump/motor 5 is in pump work state, its inlet port It is connected with check valve 11, oil discharge outlet is connected with accumulator group 17, is the accumulation of energy of accumulator group 17, is by the transform gravitational energy of scraper bowl Hydraulic energy is stored in accumulator group 17, and now the electromagnet of solenoid directional control valve 19 must not electricity.

When power shovel scraper bowl is lifted, lifting motor 4 is in motoring condition, and the DC bus-bar voltage in frequency converter 14 is constant, The electric energy of storage is passed through DC/DC converters 15 for lifting motor 4 is powered by super capacitor group 16, while hydraulic pump/motor 5 is in Operation status of motor, solenoid directional control valve electromagnet 19 obtains electric, the energy release that accumulator group 17 will be stored, and drives hydraulic pump/horse Up to 5 work, service hoisting motor 4 works.

Embodiment 3:Shown in Fig. 3, the present embodiment is similar with the operation principle of embodiment 1, and difference is to eliminate slippage pump 12, Repairing pump motor 13, high pressure accumulator group 6 and I overflow valves 7, the overflow valve 9 of low pressure accumulator group 8 and the IIth, increased one The proportional reversing valve group 21 being made up of four 2/2-way proportional reversing valves, its P mouthfuls of two 2/2-way ratios commutation of connection Valve is normally off, and T mouthfuls of two 2/2-way proportional reversing valves of connection are normally open, by adjusting any 2/2-way ratio The restriction aperture of example reversal valve, can carry out speed governing to hydraulic pump/motor, while increasing system damping, improve system stabilization Property.

Claims (6)

1. the power shovel lifting system of electro-hydraulic combination drive, it is characterized in that:Including scraper bowl, hoisting drum, decelerator, lifting motor, Hydraulic pump/motor, accumulator group, overflow valve, frequency converter, DC/DC converters, super capacitor group;Lifting motor frequency converter it is straight DC/DC converters are connected on stream bus, DC/DC converters are connected with super capacitor group;Hydraulic pump/motor is placed in lifting motor The output end of any power transmission shaft between decelerator.
2. the power shovel lifting system of electro-hydraulic combination drive according to claim 1, it is characterized in that:The accumulator group difference It is high pressure accumulator group, low pressure accumulator group, low pressure accumulator group is connected with the inlet port of hydraulic pump/motor, high pressure accumulator Group is connected with the oil discharge outlet of hydraulic pump/motor;Slippage pump is connected by check valve with hydraulic pump/motor, and slippage pump is by slippage pump Motor drives.
3. the power shovel lifting system of electro-hydraulic combination drive according to claim 2, it is characterized in that:When power shovel scraper bowl declines When, lifting motor is in generating state, and the DC bus-bar voltage in frequency converter is raised, and is super capacitor by DC/DC converters Group charges, meanwhile, hydraulic pump/motor is in pump work state, and its inlet port is connected with low pressure accumulator group, oil discharge outlet and high pressure Accumulator group is connected, and fluid is drawn into high pressure accumulator group from low pressure accumulator group, the gravitional force that scraper bowl is fallen Hydraulic energy is converted into be stored in high pressure accumulator group;When pressure sensor detects the reduction of low pressure accumulator group pressure, pass through Controller control repairing pump motor work, drives slippage pump repairing;When power shovel scraper bowl is lifted, lifting motor is in electronic shape State, the DC bus-bar voltage in frequency converter is constant, super capacitor group by DC/DC converters for lifting motor is powered, while liquid Pressure pump/motor is in operation status of motor, the energy release that high pressure accumulator group will be stored, and drives hydraulic pump/motor work, auxiliary Lifting motor is helped to work;If disconnecting the connection of hydraulic pump/motor and lifting motor, only need to be by the pivot angle of hydraulic pump/motor Zero degree is adjusted, now, hydraulic pump/motor idle running, discharge capacity is zero, increased the damping of lifting motor, improves the steady of system It is qualitative.
4. the power shovel lifting system of electro-hydraulic combination drive according to claim 1, it is characterized in that:The hydraulic pump/motor A hydraulic fluid port connected by check valve, solenoid directional control valve and pressurized reservoir, its another hydraulic fluid port is connected with accumulator group.
5. the power shovel lifting system of electro-hydraulic combination drive according to claim 4, it is characterized in that:When power shovel scraper bowl falls When, lifting motor is in generating state, and the DC bus-bar voltage in frequency converter is raised, and is super capacitor by DC/DC converters Group charges, meanwhile, hydraulic pump/motor is in pump work state, is that accumulator group stores by fluid from pressurized reservoir through check valve Can, by the transform gravitational energy of scraper bowl for hydraulic energy is stored in accumulator group, now solenoid directional control valve electromagnet must not electricity;When When power shovel scraper bowl is lifted, lifting motor is in motoring condition, and the DC bus-bar voltage in frequency converter is constant, and super capacitor group passes through DC/DC converters are powered for lifting motor, while hydraulic pump/motor is in operation status of motor, the energy that accumulator group will be stored Amount release, drives hydraulic pump/motor work, the work of service hoisting motor.
6. according to the power shovel lifting system of the electro-hydraulic combination drive described in any 1 of claim 1 ~ 5, it is characterized in that:Hydraulic pump/ Motor for it is following any one:
(1)Unidirectional pump/motor;
(2)Two-way pump/motor;
(3)One group of hydraulic pump/motor;
(4)Multigroup hydraulic pump/motor is in parallel.
CN201610994441.7A 2016-11-11 2016-11-11 The power shovel lifting system of electro-hydraulic combination drive CN106761760A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107387106A (en) * 2017-08-15 2017-11-24 太原理工大学 The shielding tunnel excavator of combination drive
CN107387081A (en) * 2017-08-15 2017-11-24 太原理工大学 The Rocker coal mining machine of combination drive
CN107444847A (en) * 2017-08-15 2017-12-08 太原理工大学 The long belt conveyor of combination drive
CN107482840A (en) * 2017-08-15 2017-12-15 太原理工大学 Action potential accumulating loop and motor compound drive system and its control method
CN107537671A (en) * 2017-08-15 2018-01-05 太原理工大学 The disintegrating machine of combination drive
CN107587875A (en) * 2017-08-15 2018-01-16 太原理工大学 The development machine of combination drive
CN107628037A (en) * 2017-08-15 2018-01-26 太原理工大学 The railcar train of combination drive
CN107630815A (en) * 2017-08-15 2018-01-26 太原理工大学 The air compressor machine of combination drive
CN108757879A (en) * 2018-05-25 2018-11-06 太原理工大学 A kind of hydraulic-machinery combined driving device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201850017U (en) * 2010-11-16 2011-06-01 南通维科机电制造有限公司 Novel super-capacitor-type elevator energy-saving control device
CN103241606A (en) * 2013-05-22 2013-08-14 太原理工大学 Electro-hydraulic hybrid driving mine lifting device and control method thereof
CN105089087A (en) * 2015-09-07 2015-11-25 一重集团大连设计研究院有限公司 Electric shovel hoisting system
CN105839689A (en) * 2016-04-26 2016-08-10 华侨大学 Multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201850017U (en) * 2010-11-16 2011-06-01 南通维科机电制造有限公司 Novel super-capacitor-type elevator energy-saving control device
CN103241606A (en) * 2013-05-22 2013-08-14 太原理工大学 Electro-hydraulic hybrid driving mine lifting device and control method thereof
CN105089087A (en) * 2015-09-07 2015-11-25 一重集团大连设计研究院有限公司 Electric shovel hoisting system
CN105839689A (en) * 2016-04-26 2016-08-10 华侨大学 Multi-energy multi-motor hydraulic excavator electro-hydraulic mixing driving system and control method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107387106A (en) * 2017-08-15 2017-11-24 太原理工大学 The shielding tunnel excavator of combination drive
CN107387081A (en) * 2017-08-15 2017-11-24 太原理工大学 The Rocker coal mining machine of combination drive
CN107444847A (en) * 2017-08-15 2017-12-08 太原理工大学 The long belt conveyor of combination drive
CN107482840A (en) * 2017-08-15 2017-12-15 太原理工大学 Action potential accumulating loop and motor compound drive system and its control method
CN107537671A (en) * 2017-08-15 2018-01-05 太原理工大学 The disintegrating machine of combination drive
CN107587875A (en) * 2017-08-15 2018-01-16 太原理工大学 The development machine of combination drive
CN107628037A (en) * 2017-08-15 2018-01-26 太原理工大学 The railcar train of combination drive
CN107630815A (en) * 2017-08-15 2018-01-26 太原理工大学 The air compressor machine of combination drive
CN107628037B (en) * 2017-08-15 2019-06-11 太原理工大学 The railcar train of combination drive
CN107482840B (en) * 2017-08-15 2019-10-25 太原理工大学 Action potential storage and transportation circuit and motor compound drive system and its control method
CN108757879A (en) * 2018-05-25 2018-11-06 太原理工大学 A kind of hydraulic-machinery combined driving device

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Application publication date: 20170531