CN107599893A - Electric Motor Wheel self-dumping car and its dynamical system - Google Patents
Electric Motor Wheel self-dumping car and its dynamical system Download PDFInfo
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Abstract
The present invention relates to quarry tipper field, discloses a kind of Electric Motor Wheel self-dumping car and its dynamical system, and the dynamical system includes stringing by electric system, energy conversion system, energy storage system and energy management system, wherein:The stringing is by electric system, for obtaining electric energy from power network;The energy conversion system, for the electric energy needed for the motor operating of the electric energy or the Electric Motor Wheel self-dumping car that are converted into the stringing needed for the energy storage system charging by the electric energy acquired in electric system under the control of the energy management system;The energy storage system, for being charged under the control of the energy management system or providing electric energy for the motor of the Electric Motor Wheel self-dumping car;And the energy management system, for being controlled to the energy conversion system and the energy storage system.The present invention can significantly reduce the cost of surface mining.
Description
Technical field
The present invention relates to quarry tipper field, in particular it relates to a kind of Electric Motor Wheel self-dumping car and its dynamical system.
Background technology
Electric power wheel self-discharging vehicle is the exemplary apparatus in opencut operation, and its power resources is mainly diesel-driven generator.According to
Opencut operation data, the diesel consumption of Electric Motor Wheel self-dumping car account for 30% or so of opencut running cost, if it is possible to aobvious
Writing reduces the diesel consumption of Electric Motor Wheel self-dumping car, the operation expenses with regard to that can save significantly on opencut.
In order to reduce the cost of surface mining, it is non-that Chinese patent application CN104309486A discloses a kind of Electric Motor Wheel
Road dump truck stringing system, it adds overhead line erecting equipment on the basis of original diesel engine, by the use of overhead line erecting equipment as electronic
The active force of mine car climbing is taken turns, reduces the output of diesel engine;Diesel engine is still used when level road is run as sole power
Source.The defects of patent application, is, in the level road operation phase, Electric Motor Wheel mine car is still using diesel engine as main power resources, only
It can depart from diesel-driven generator the short time when providing auxiliary power using stringing system in the upward slope stage, and in the descending stage
Potential energy and brake kinetic energy are not reclaimed.Therefore, the amplitude that its diesel oil is saved still is not very big.
Chinese patent application CN203211118U discloses " one kind energy-conservation hybrid power mine electric wheel dump ", its
A set of super capacitor energy-storage system in parallel in the dynamical system of original electric power wheel self-discharging vehicle, the super capacitor energy-storage system is in ore deposit
Recovery section energy when car descending and brake, extra motive power can be provided during vehicle accelerates and climbs
To reduce the output of the peak value of engine.The shortcomings that patent application is, its still using diesel-driven generator as major impetus source,
Only in seldom period, such as accelerate, climbing initial stage, just extra power supply is provided using super capacitor, when diesel-driven generator needs
The shortcomings that quarter is run, and super capacitor energy density is small also constrains the ratio of energy regenerating, therefore its oil-saving effect is failed to understand
It is aobvious.
The content of the invention
It is an object of the invention to provide a kind of Electric Motor Wheel self-dumping car and its dynamical system, and it can significantly reduce outdoor adopt
The cost of ore deposit.
To achieve these goals, the present invention provides a kind of dynamical system for Electric Motor Wheel self-dumping car, the dynamical system
System includes stringing by electric system, energy conversion system, energy storage system and energy management system, wherein:The stringing by
Electric system, for obtaining electric energy from power network;The energy conversion system, under the control of the energy management system by institute
State stringing and be converted into the required electric energy of the energy storage system charging or the Electric Motor Wheel certainly by the electric energy acquired in electric system
Electric energy needed for the motor operating of unloading miner's truck;The energy storage system, for entering under the control of the energy management system
Row charging provides electric energy for the motor of the Electric Motor Wheel self-dumping car;And the energy management system, for the energy
Amount converting system and the energy storage system are controlled.
The present invention also provides a kind of Electric Motor Wheel self-dumping car, and the Electric Motor Wheel self-dumping car includes above-mentioned dynamical system.
Pass through above-mentioned technical proposal, because the application is to use pure power-driven power system come the electricity for Electric Motor Wheel self-dumping car
Machine provides power, therefore it does not need diesel-driven generator, because the price of electric energy is much smaller than the price of diesel oil, therefore the application energy
The operation cost of opencut is enough greatly reduced.Set further, since employing pure power-driven power system instead of diesel-driven generator
It is standby, therefore be also improved according to the Electric Motor Wheel self-dumping car of the application and its mechanical stability of dynamical system, and reduce
Equipment complexity;Due to not needing burning diesel oil, therefore waste gas discharge can also be greatly decreased.Further, since stringing by
The safety and reliability of electric system is high, with little need for maintenance, therefore compared to prior art, the maintenance cost of the application
Substantially reduce.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic block diagram according to the dynamical system for Electric Motor Wheel self-dumping car of one embodiment of the present invention;
Fig. 2 is the schematic block diagram according to the dynamical system for Electric Motor Wheel self-dumping car of a further embodiment of this invention;
And
Fig. 3 is the typical condition schematic diagram of Electric Motor Wheel self-dumping car.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the mining operations scene of surface mine, Electric Motor Wheel self-dumping car is due to operation mobility is good, all rotating speeds
Spend the advantages that fast, climbing capacity is strong and turn into the main delivery vehicle of surface mine.It will be produced in Electric Motor Wheel self-dumping car
Ore deposit from loading area be carried to unloading area during, Electric Motor Wheel self-dumping car may undergo flat road surface, upward slope, descending etc.,
Therefore for Electric Motor Wheel self-dumping car suitable dynamical system is provided to improve the operational efficiency of Electric Motor Wheel self-dumping car and reduction is adopted
Ore deposit cost is necessary.
The present invention provides a kind of dynamical system for Electric Motor Wheel self-dumping car, as shown in figure 1, the dynamical system can wrap
Stringing is included by electric system 10, energy conversion system 20, energy storage system 30 and energy management system 40, wherein:The frame
Line is by electric system 10, for obtaining electric energy from power network;The energy conversion system 20, in the energy management system 40
The stringing is converted into the energy storage system 30 by the electric energy acquired in electric system 10 under control to charge required electric energy
Or the motor 50 of the Electric Motor Wheel self-dumping car operates required electric energy;The energy storage system 30, in the energy
Charged under the control of control system 40 or provide electric energy for the motor 50 of the Electric Motor Wheel self-dumping car;And the energy
Control system 40, for being controlled to the energy conversion system 20 and the energy storage system 30.
Because the application is to use pure power-driven power system to provide power, therefore its for the motor of Electric Motor Wheel self-dumping car
Diesel-driven generator is not needed, because the price of electric energy is much smaller than the price of diesel oil, therefore opencut can be greatly reduced in the application
Operation cost.Further, since pure power-driven power system is employed instead of diesel generation machine equipment, therefore according to the application
The mechanical stability of the dynamical system for Electric Motor Wheel self-dumping car be also improved, and reduce equipment complexity;
Due to not needing burning diesel oil, therefore waste gas discharge can also be greatly decreased.Further, since stringing by electric system security and
Reliability is high, with little need for maintenance, therefore compared to prior art, is used for the dynamic of Electric Motor Wheel self-dumping car according to the application
The maintenance cost of Force system is greatly reduced.
In an optional embodiment of the dynamical system according to the present invention, stringing can be included contact by electric system 10
Net and pantograph.Contact net is set up along running orbit overhead, the power supply driving wheel on the operation road of Electric Motor Wheel self-dumping car
The pantograph of self-dumping car takes the ultra-high-tension power transmission line of stream.Because the structure of contact net and pantograph is well known, institute
So that here is omitted.
In addition, the fundamental design idea of the present invention is, energy storage system 30 is as the main dynamic of Electric Motor Wheel self-dumping car
Power source, there is provided the energy output needed for Electric Motor Wheel self-dumping car day-to-day operation;When the motor 50 of Electric Motor Wheel self-dumping car needs
When larger energy and energy storage system 30 are not enough to provide the energy, using stringing by electric system 10 or using stringing by
Both electric system 10 and energy storage system 30 to provide energy for the motor 50 of Electric Motor Wheel self-dumping car.This will enter below
Row is described in detail.
In an optional embodiment of the dynamical system for Electric Motor Wheel self-dumping car according to the present invention, described
In the case that energy storage system 30 can provide enough electric energy for the motor 50 of the Electric Motor Wheel self-dumping car, such as when electronic
Self-dumping car traveling is taken turns when in flat road surface, either when Electric Motor Wheel self-dumping car is located at loading area or unloading Qu Zhongshi, institute
The motor 50 that energy management system 40 promotes the energy storage system 30 to be the Electric Motor Wheel self-dumping car is stated to power.Thus
It can be powered using pure electric power system for the motor 50 of Electric Motor Wheel self-dumping car, without diesel oil of the prior art
Generator, so as to greatly save the operation cost of opencut, reduce waste emission.
In an optional embodiment of the dynamical system for Electric Motor Wheel self-dumping car according to the present invention, described
Stringing by electric system 10 can from the power network obtain electric energy in the case of, then the energy management system 40 promotes the energy
The motor 50 that the stringing is converted into the Electric Motor Wheel self-dumping car by converting system 20 by the electric energy acquired in electric system 10 is transported
Turn required electric energy and the electric energy after conversion is supplied to the motor 50 of the Electric Motor Wheel self-dumping car.For example, in Electric Motor Wheel certainly
In the case that unloading miner's truck needs very big energy, such as when Electric Motor Wheel self-dumping car is climbed, the now energy stores system
The electric energy that system 30 provides may not meet the demand of the motor 50 of the Electric Motor Wheel self-dumping car, the then meeting of energy management system 40
Promote to be provided electric energy by electric system 10 for the motor 50 of Electric Motor Wheel self-dumping car using stringing, that is, in Electric Motor Wheel self-dumping car
In the case of needing very big energy, first choice is provided electric energy by electric system 10 using stringing for the motor 50 of Electric Motor Wheel self-dumping car.
Certainly, if Electric Motor Wheel self-dumping car needs very big energy, but the electric energy that the stringing is provided by electric system 10
The demand of the motor 50 of the Electric Motor Wheel self-dumping car can not be met, then in this case, the energy management system 40 is also
For promoting the motor 50 that the energy storage system 30 is the Electric Motor Wheel self-dumping car to provide electric energy simultaneously, namely this
In the case of, energy management system 40 promotes stringing by electric system 10 and energy storage system 30 while for Electric Motor Wheel self-dumping car
Motor 50 provides electric energy, to improve power output and accelerate the Ramp Rate of Electric Motor Wheel self-dumping car.
In addition, if Electric Motor Wheel self-dumping car needs very big energy (for example, during climbing), and the stringing is by electric system 10
Enough electric energy can be provided for the motor 50 of the Electric Motor Wheel self-dumping car, then in this case, the energy management system
40 are additionally operable to, and promote the energy conversion system 20 to be converted into the stringing by the part electric energy acquired in electric system 10 described
Energy storage system 30 charges required electric energy, thinks that the energy storage system 30 charges.That is, in stringing by electric system 10
Can either be that energy management system 40 also promotees in the case that the motor 50 of Electric Motor Wheel self-dumping car provides electric energy and has electric energy more than needed
Make to be charged for energy storage system 30 by the electric energy more than needed of electric system 10 using stringing, this makes it possible to realize Electric Motor Wheel self-unloading ore deposit
Car charges in traveling, namely does not need Electric Motor Wheel self-dumping car stopping for charging, therefore improves operating efficiency.
In an optional embodiment of the dynamical system according to the present invention, in the Electric Motor Wheel self-dumping car descending
When, the energy management system 40 promotes the energy storage system 30 to reclaim the brake kinetic energy of the Electric Motor Wheel self-dumping car simultaneously
Promote the energy conversion system 20 that the stringing is converted into the energy storage system by the electric energy acquired in electric system 10
Electric energy needed for 30 chargings, so that the energy storage system 30 is charged.This makes it possible to realize Electric Motor Wheel self-dumping car
Charged in traveling, improve operating efficiency, and charged by using brake kinetic energy, also save the energy and improve
Energy utilization efficiency.
In an optional embodiment of the dynamical system according to the present invention, slow down in the Electric Motor Wheel self-dumping car
When, the energy management system 40 promotes the energy conversion system 20 to change the deceleration kinetic energy of the Electric Motor Wheel self-dumping car
Charged required electric energy into the energy storage system 30.It so can also realize being filled in traveling for Electric Motor Wheel self-dumping car
Electricity, operating efficiency is improved, and charged by using deceleration kinetic energy, also saved the energy and improve energy utilization effect
Rate.
In an optional embodiment of the dynamical system according to the present invention, contact net of the stringing by electric system 10
Can be laid in needs to charge or need for the energy storage system 30 to provide the opening position of auxiliary electric energy, for example, stringing
The opening positions such as loading area, unloading area, sloped region, maintenance station can be laid in by the contact net of electric system 10.Moreover, electronic
The energy that wheel self-dumping car needs is not that very big and energy storage system 30 can provide for the motor 50 of Electric Motor Wheel self-dumping car
The opening position of enough electric energy, if these opening positions have laid contact net of the stringing by electric system 10, can using stringing by
It while the motor 50 of Electric Motor Wheel self-dumping car provides electric energy using stringing by electric system 10 is energy stores system that electric system 10, which is,
The charging of system 30, to realize being charged in operation for Electric Motor Wheel self-dumping car, so as to improve operating efficiency.That is, stringing be present
By the place of electric system 10, first choice is that motor 50 provides electric energy by electric system 10 using stringing, and is carried in stringing by electric system 10
In the case of the electric energy affluence of confession, charged using stringing by electric system 10 for energy storage system 30.
In an optional embodiment of the dynamical system according to the present invention, the power network can be AC network.
In this case, as shown in Fig. 2 the energy conversion system 20 can include AC-DC conversion module 201 and DC-AC moduluss of conversion
Block 202, the AC ends of the AC-DC conversion module 201 are connected to the stringing and are connected to the DC-AC by electric system 10, DC ends
The DC ends of modular converter 202 and the energy storage system 30, AC ends and the Electric Motor Wheel of the DC-AC modular converters 202
The motor 50 of self-dumping car connects.
The operation principle of dynamical system shown in Fig. 2 is as follows:
(1) energy needed in Electric Motor Wheel self-dumping car is not very big and energy storage system 30 can be Electric Motor Wheel self-unloading
In the case that the motor 50 of mine car provides enough electric energy, it is Electric Motor Wheel self-unloading that energy management system 40, which promotes energy storage system 30,
The motor 50 of mine car provides electric energy, namely energy management system 40 promotes energy storage system 30 defeated to DC-AC modular converters 202
Go out direct current, and promote DC-AC modular converters 202 that the direct current received is converted into the work of motor 50 of Electric Motor Wheel self-dumping car
Alternating current needed for making.If moreover, provide the electronic of electric energy in energy storage system 30 for the motor 50 of Electric Motor Wheel self-dumping car
Wheel self-dumping car has laid contact net of the stringing by electric system 10 in workspace, then energy management system 40 can promote simultaneously
Stringing is converted into needed for energy storage system 30 charges by AC-DC conversion module 201 by the AC energy acquired in electric system 10
Direct current energy, to charge for energy storage system 30 simultaneously;Or the first choice of energy management system 40 utilizes stringing by electric system
Electric energy and energy storage system 30 needed for the motor 50 of 10 offer Electric Motor Wheel self-dumping cars charge required electric energy.
(2) it is Electric Motor Wheel self-unloading ore deposit by electric system 10 to need very big energy in Electric Motor Wheel self-dumping car and need by stringing
In the case that the motor 50 of car provides electric energy, energy management system 40 promotes AC-DC conversion module 201 by stringing by electric system 10
Acquired electricity is converted into direct current, and the direct current for promoting DC-AC modular converters 202 to be exported AC-DC conversion module 201
The motor 50 for being converted into Electric Motor Wheel self-dumping car works required electricity.Now, if the electric energy that is provided by electric system 10 of stringing not
The demand of the motor 50 of Electric Motor Wheel self-dumping car can be met, then energy management system 40 also promotes energy storage system 30 logical simultaneously
Alternating current needed for the offer work of motor 50 that DC-AC modular converters 202 are Electric Motor Wheel self-dumping car is provided.
(3) in Electric Motor Wheel self-dumping car descending, energy management system 40 promote AC-DC conversion module 201 by stringing by
Alternating current acquired in electric system 10 is converted into energy storage system 30 and charged required direct current, to be energy stores system
The charging of system 30.
(4) slow down, when brake in Electric Motor Wheel self-dumping car, energy management system 40 is forced through DC-AC conversions
Module 202 utilizes the kinetic energy caused by the motor 50 of Electric Motor Wheel self-dumping car to charge for energy storage system 30.
Certainly, the power network can also be direct current network.In this case, the energy conversion system 20 can include
First DC-DC modular converters (not shown) and the first DC-AC modular converters, a DC end of the first DC-DC modular converters
It is connected to the stringing and is connected to the DC ends of the first DC-AC modular converters and the energy by electric system 10, another DC ends
Storage system 30, the AC ends of the first DC-AC modular converters are connected with the motor 50 of the Electric Motor Wheel self-dumping car.
In addition, energy storage system 30 described herein can be any type of chargeable electrical energy storage device,
Such as high power rechargeable battery pack.
The dynamical system of the application and existing diesel-driven generator dynamical system are compared in citing below.
Assuming that the operating condition of a typical Electric Motor Wheel self-dumping car is as shown in Figure 3.
Wherein, level land range ability L1=L2=1.3km, slope height H=80m, slope tilt angles theta=8%.If Electric Motor Wheel is certainly
The diesel engine rated power that unloading miner's truck uses is 1500kw, is come and gone according to Electric Motor Wheel self-dumping car between loading area and unloading area
The run time of one time, which is 20-30 minutes, operation daily 50-70 is round calculates.
If existing diesel power systems are replaced with into dynamical system described herein, about 800kwh- is needed
The inverter that 900kwh battery pack and a general power are 3200kw (can include AC-DC conversion module as shown in Figure 2
201 and DC-AC modular converters 202), and a set of pantograph system.The carrying out practically time of Electric Motor Wheel self-dumping car and parameter
It is as shown in the table:
Wherein, electric power output all during climbing is supplied by stringing by electric system 10, and power is about 1500kw;Descending
During gravitional force can be converted to kinetic energy and then be converted into electric energy reclaimed, about 178kw, while by stringing by electricity system
System 10 charges to energy storage system 30, and power is about 3000kw.Remaining time is Electric Motor Wheel self-unloading by energy storage system 30
The motor 50 of mine car provides electric energy.
Operating mode according to listed by upper table is calculated, and each working cycles need 169KWh electric energy, takes energy stores system
30 each discharge and recharge degree of uniting are 20%, it is necessary to 845Kwhr battery.Due to eliminating diesel engine and generator and fuel tank,
Increased battery can't cause difficulty on space and weight to the body frame structure for automotive of Electric Motor Wheel self-dumping car.
Calculated according to Electric Motor Wheel self-dumping car year using 5000 hours, battery carries out 1.1 ten thousand discharge and recharges every year, according to mesh
The actual conditions of preceding electrokinetic cell calculate, at least can use 4 years.
According to calculating, it is about 4,600,000 that the annual diesel oil expense of diesel-driven generator is used under this operating mode;Using the application institute
After the dynamical system stated, the annual electricity charge are 1,760,000, and operating cost have dropped 60% or so.
The application also provides a kind of Electric Motor Wheel self-dumping car, and the Electric Motor Wheel self-dumping car can include being used for as described above
The dynamical system of Electric Motor Wheel self-dumping car.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of dynamical system for Electric Motor Wheel self-dumping car, the dynamical system includes stringing by electric system, energy conversion system
System, energy storage system and energy management system, wherein:
The stringing is by electric system, for obtaining electric energy from power network;
The energy conversion system, under the control of the energy management system by the stringing by acquired in electric system
Electric energy is converted into needed for the motor operating of the electric energy or the Electric Motor Wheel self-dumping car needed for the energy storage system charging
Electric energy;
The energy storage system, for being charged under the control of the energy management system or being the Electric Motor Wheel self-unloading
The motor of mine car provides electric energy;And
The energy management system, for being controlled to the energy conversion system and the energy storage system.
2. dynamical system according to claim 1, wherein, can be the Electric Motor Wheel self-unloading in the energy storage system
In the case that the motor of mine car provides enough electric energy, it is described electronic that the energy management system, which promotes the energy storage system,
Take turns the motor power supply of self-dumping car.
3. dynamical system according to claim 1, wherein, it can be obtained electricity from the power network by electric system in the stringing
In the case of energy, the energy management system promotes the energy conversion system by the stringing by the electric energy acquired in electric system
The motor for being converted into the Electric Motor Wheel self-dumping car operates required electric energy and the electric energy after conversion is supplied into the Electric Motor Wheel
The motor of self-dumping car.
4. dynamical system according to claim 3, wherein, the energy management system is additionally operable to, in the stringing by electricity
In the case that the electric energy that system provides can not meet the demand of motor of the Electric Motor Wheel self-dumping car, while promote the energy
Storage system provides electric energy for the motor of the Electric Motor Wheel self-dumping car.
5. dynamical system according to claim 3, wherein, the energy management system is additionally operable to, in the stringing by electricity
In the case that system can provide enough electric energy for the motor of the Electric Motor Wheel self-dumping car, promote the energy conversion system will
The stringing is converted into the electric energy needed for the energy storage system charging by the part electric energy acquired in electric system, is thought described
Energy storage system charges.
6. dynamical system according to claim 1, wherein, in the Electric Motor Wheel self-dumping car descending, the energy control
System processed promotes the energy storage system to reclaim the brake kinetic energy of the Electric Motor Wheel self-dumping car and promotes the energy conversion
The stringing is converted into the required electric energy of the energy storage system charging by system by the electric energy acquired in electric system, with toilet
Energy storage system is stated to be charged.
7. dynamical system according to claim 1, wherein, when the Electric Motor Wheel self-dumping car slows down, the energy control
System processed promotes the energy conversion system that the deceleration kinetic energy of the Electric Motor Wheel self-dumping car is converted into the energy stores
Electric energy needed for system charging, to be charged for the energy storage system.
8. the dynamical system according to any claim in claim 1 to 7, wherein, the stringing is connect by electric system
Touching net to be laid in needs to charge or need the opening position for providing auxiliary electric energy for the energy storage system.
9. the dynamical system according to any claim in claim 1 to 7, wherein, the power network is AC network, and
And the energy conversion system includes AC-DC conversion module and DC-AC modular converters, the AC ends of the AC-DC conversion module connect
It is connected to the stringing and is connected to the DC ends of the DC-AC converting systems and the energy storage system by electric system, DC ends, it is described
The AC ends of DC-AC modular converters and the motor connection of the Electric Motor Wheel self-dumping car.
10. a kind of Electric Motor Wheel self-dumping car, the Electric Motor Wheel self-dumping car is included in claim 1 to 9 described in any claim
Dynamical system.
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CN108162769A (en) * | 2018-02-13 | 2018-06-15 | 内蒙古幸汇国创重工有限公司 | The dynamical system and its control method of off-highway electric power wheel self-discharging vehicle |
CN108382232A (en) * | 2018-02-13 | 2018-08-10 | 内蒙古幸汇国创重工有限公司 | A kind of Dynamic design method of quarry tipper |
CN109204000A (en) * | 2018-09-30 | 2019-01-15 | 北京科技大学 | A kind of pantograph especially of stringing formula pure electric vehicle underground carry scraper stringing system |
CN109774496A (en) * | 2019-01-30 | 2019-05-21 | 青岛慧拓智能机器有限公司 | A kind of transmission system and quarry tipper of quarry tipper |
CN110341501A (en) * | 2019-07-30 | 2019-10-18 | 河南赐福重工股份有限公司 | A kind of off-highway rigid dumper of pure electric vehicle |
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