US20160326718A1 - Hydraulic mining shovel with scr unit - Google Patents
Hydraulic mining shovel with scr unit Download PDFInfo
- Publication number
- US20160326718A1 US20160326718A1 US15/145,566 US201615145566A US2016326718A1 US 20160326718 A1 US20160326718 A1 US 20160326718A1 US 201615145566 A US201615145566 A US 201615145566A US 2016326718 A1 US2016326718 A1 US 2016326718A1
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- US
- United States
- Prior art keywords
- module
- exhaust aftertreatment
- reductant
- mining shovel
- hydraulic mining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0883—Tanks, e.g. oil tank, urea tank, fuel tank
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/18—Counterweights
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/308—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working outwardly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present disclosure relates to a hydraulic mining shovel, and more particularly to a hydraulic mining shovel configuration including an exhaust aftertreatment module with a selective catalytic reduction unit.
- hydraulic mining shovels may be used for digging and extracting material and minerals.
- the same may include one or more engines.
- those engines may be electric motors or internal combustion engines such as diesel engines.
- SCR selective catalytic reduction
- the present disclosure is directed, at least in part, to improving or overcoming one or more aspects of prior systems.
- a hydraulic mining shovel may comprise a main frame extending along a central longitudinal axis, and a power module mounted onto the main frame and including a first internal combustion engine and a second internal combustion engine.
- the hydraulic mining shovel may further comprise a counterweight module mounted onto the main frame and including a counterweight for maintaining stability of the hydraulic mining shovel.
- the hydraulic mining shovel may comprise a first exhaust aftertreatment module and a second exhaust aftertreatment module. Each of the first exhaust aftertreatment module and the second exhaust aftertreatment module may be mounted onto the counterweight module and may include a reductant tank and pump unit and a selective catalytic reduction unit.
- the reductant tank and pump unit may be configured to store and supply a reductant, and the selective catalytic reduction unit may be fluidly connected to the respective reductant tank and pump unit for receiving the reductant.
- the first exhaust aftertreatment module may be fluidly connected to the first internal combustion engine.
- the second exhaust aftertreatment module may be fluidly connected to the second internal combustion engine.
- the first exhaust aftertreatment module and the second exhaust aftertreatment module may be configured and arranged substantially mirror-symmetrically at opposing sides of the counterweight module with respect to the central longitudinal axis.
- a carrier structure in another aspect of the present disclosure, may be configured to support a reductant pump and tank unit, and a selective catalytic reduction unit. Further, the carrier structure may be configured to be releasably mounted on a hydraulic mining shovel, particularly onto a counterweight module of the hydraulic mining shovel.
- FIG. 1 shows a side view drawing of an exemplary hydraulic mining shovel
- FIG. 2 shows a schematic top view onto an exemplary superstructure
- FIG. 3 shows a schematic top view onto another exemplary superstructure
- FIG. 4 shows a drawing of an exemplary exhaust aftertreatment module
- FIG. 5 shows a drawing of the exemplary exhaust aftertreatment module including a cover.
- the present disclosure is based in part on the realization that a hydraulic mining shovel poses specific and challenging requirements for an optimized integration of an SCR aftertreatment unit.
- an SCR aftertreatment unit and its components sum up to a considerable size, because the large internal combustion engines of a hydraulic mining shovel generate large amounts of exhaust gas to be treated by the SCR aftertreatment unit.
- a modular construction of the SCR aftertreatment units is suggested, which includes all required components, partly integrated into sub-units for integrating different functionalities.
- an arrangement of the SCR aftertreatment units is suggested, which considers the specific requirements of a hydraulic mining shovel in terms of collision avoidance, operator and machine safety, space-saving arrangement, and homogeneous mass distribution as is described in greater detail later on.
- a modular configuration of the aftertreatment unit in coordination with further modules and components of the hydraulic mining shovel allows to provide a plurality of construction kits for hydraulic mining shovels having a plurality of standardized parts while providing different exhaust aftertreatment capabilities.
- a hydraulic mining shovel may require an SCR unit or not.
- the exhaust aftertreatment unit as a module, the same may be included or not as desired without affecting the presence, configuration and arrangement of the remaining parts and components of the hydraulic mining shovel such as the internal combustion engine(s).
- a modular configuration of the hydraulic mining shovel with respect to the exhaust aftertreatment module may facilitate retrofitting the exhaust aftertreatment module without requiring modifications and rearrangement of other components of the hydraulic mining shovel.
- connecting parts and points for mounting the aftertreatment module and connecting the same to the internal combustion engine may be already present in a required configuration for receiving the aftertreatment module.
- hydraulic mining shovel 100 comprises a superstructure (upper carriage) 102 , an undercarriage 104 , and an attachment 106 with an implement 108 .
- a slewing gear device (swing gear device) 110 is mounted to superstructure 102 and undercarriage 104 to enable a relative rotary movement to occur between superstructure 102 and undercarriage 104 .
- Superstructure 102 includes a plurality of modules mounted to one another and/or to a main frame 112 extending longitudinally in a bottom region of superstructure 102 (in FIG. 1 a front end of main frame 112 is visible only).
- the modules include a power module 114 , a counterweight module 116 with a counterweight 117 , an operator cab module 118 , a first exhaust aftertreatment module 120 , and a second exhaust aftertreatment module and an oil cooler module (see FIGS. 2 and 3 as both are not visible in the side view of FIG. 1 ). Said modules are described in more detail herein under reference to FIGS. 2 to 5 .
- a movable service unit 115 is provided in a bottom region of power module 114 .
- Said service unit 115 may selectively move in direction to ground surface 122 for providing access to refill inlets and/or control panels for an operator on ground level.
- service unit 115 may be retracted into an accommodation chamber in power module 114 , for example by means of a hydraulic actuator.
- the retraction-and-extension-mechanism for service unit 115 may be configured to pivot service unit 115 out of its accommodation chamber.
- undercarriage 104 includes a propulsion device for propelling hydraulic mining shovel 100 on a work surface 122 .
- the propulsion device may include track chains 124 and drive motors for driving track chains 124 .
- Attachment 106 includes work implement 108 such as a face shovel, which is movably mounted to a front end of a stick 126 that is in turn movably mounted to a boom 128 .
- work implement 108 such as a face shovel
- a plurality of hydraulic actuators 130 allow moving work implement 108 , stick 126 and boom 128 as desired during mining operation.
- FIG. 2 for describing an exemplary layout concept of superstructure modules and their components. It is noted that in FIGS. 2 and 3 , modules and components are indicated in a schematic manner only. Furthermore, components accommodated inside a respective module are indicated by dashed lines, whereas solid lines indicate a visibility of the component in a top view onto superstructure 102 assuming that possibly existing covers are demounted.
- superstructure 102 includes main frame 112 , power module 114 , counterweight module 116 , operator cab module 118 , first and second aftertreatment modules 120 , 121 , and oil cooler module 132 .
- main frame 112 extends along a central longitudinal axis A and supports modules 114 , 116 , 118 and 132 .
- main frame 112 is shown in part only as it is partly overlapped, in particular, by power module 114 and counterweight module 116 .
- main frame 112 further supports swing drives 134 and a rotary distributor 136 for rotating slewing gear device 110 (see FIG. 1 ).
- first and second internal combustion engines 138 and 140 are accommodated such that their longitudinal axes (crankshaft axes) B 1 , B 2 extend parallel to central longitudinal axis A of main frame 112 .
- first and second pump transfer gearboxes 142 and 144 are operationally connected to respective outputs of first and second internal combustion engines 138 and 140 via respective couplings 146 , 148 .
- engines 138 and 140 are configured as diesel engines. Further, as depicted in FIG.
- a space-saving arrangement may include that first and second internal combustion engines 138 , 140 are configured and arranged mirror-symmetrically on opposing sides of power module 114 with respect to central longitudinal axis A.
- first and second internal combustion engines 138 , 140 may be configured and arranged merely substantially mirror-symmetrically on opposing sides of power module 114 with respect to central longitudinal axis A.
- Intake air is provided to internal combustion engines 138 , 140 by first and second air intake units 147 and 149 which are mounted on a top deck 150 of power module 114 .
- Said air intake units 147 , 149 are fluidly connected to engines 138 , 140 via suitable piping not shown in detail. Additionally, air intake units 147 and 149 may be equipped with air filters for cleaning ambient air before supplying the same to engines 138 , 140 .
- counterweight module 116 includes counterweight 117 (see FIG. 1 ).
- Counterweight module 116 is mounted onto main frame 112 with a clearance to power module 114 for allowing relative movement between modules 116 and 114 such that counterweight module 116 is decoupled (isolated) against vibrations of power module 114 , in particular, of first and second internal combustion engines 138 , 140 .
- first and second engine coolers 152 and 154 including fans for drawing ambient air from the environment are accommodated in counterweight module 116 for cooling engines 138 and 140 , respectively.
- first and second exhaust aftertreatment modules 120 and 121 are mounted on a top deck 164 of counterweight module 116 .
- Each exhaust aftertreatment module 120 , 121 includes a respective reductant tank and pump unit 160 , 162 and a respective selective catalytic reduction (SCR) unit 156 , 158 .
- first and second exhaust aftertreatment modules 120 , 121 are configured and arranged mirror-symmetrically at opposing sides of top deck 164 of counterweight module 116 with respect to central longitudinal axis A.
- SCR units 156 , 158 are mounted closer to central longitudinal axis A than reductant tank and pump units 160 , 162 .
- reductant tank and pump units 160 , 162 may be mounted closer to central longitudinal axis A than SCR units 156 , 158 .
- SCR units 156 and 158 are oriented such that their longitudinal axes C 1 and C 2 , respectively, extend parallel to central longitudinal axis A of main frame 112
- reductant tank and pump units 160 and 162 are oriented such that their longitudinal axes D 1 and D 2 extend perpendicular to central longitudinal axis A.
- first and second exhaust aftertreatment modules 120 , 121 may be configured and arranged merely substantially mirror-symmetrically at opposing sides of top deck 164 of counterweight module 116 with respect to central longitudinal axis A.
- a substantially mirror-symmetrically arrangement may include installation tolerances, and/or merely relatively small deviations from a corresponding mirror-symmetrical arrangement, for instance, a single digit percentage deviation relative to a corresponding absolute mirror-symmetrical arrangement.
- first and second exhaust aftertreatment modules 120 and 121 are substantially isolated against vibrations of internal combustion engines 138 and 140 due to the installation onto counterweight module 116 .
- first and second exhaust aftertreatment modules 120 and 121 are arranged to prevent occurrence of any collisions with material to be excavated and other vehicles. The reason is that modules 120 and 121 do not or at least not substantially project beyond counterweight module 116 in directions of central longitudinal axis A and perpendicular to central longitudinal axis A.
- modules 120 , 121 and railways see FIG.
- top decks 150 and 164 may function as barriers for increasing safety of operators walking on top decks 150 and 164 to prevent that operators may fall down to working surface 122 .
- the mirror-symmetrical arrangement provides a homogeneous mass distribution acting onto counterweight module 116 , which further increases the stability of hydraulic mining shovel 100 and may also allow to reduce a mass of counterweight 117 (see FIG. 1 ) as such a mass reduction may be compensated by exhaust aftertreatment modules 120 , 121 .
- First reductant tank and pump units 160 , 162 may be integrated units including a storage chamber for storing a reductant, and at least one pump for pumping the reductant from the storage chamber to the respective SCR units 156 or 158 .
- first reductant tank and pump units 160 , 162 may be integrated units including a storage chamber for storing a reductant, and at least one pump for pumping the reductant from the storage chamber to the respective SCR units 156 or 158 .
- Each storage chamber may have a capacity of several hundred liters, for example more than 500 liters, because the to-be-treated exhaust gas amount generated by engines 138 and 140 may be relatively large.
- the storage capacity may be configured to provide enough reductant for at least one work shift, preferably at least one work day.
- an operator may connect a supply pipe to a reductant refill inlet(s) 166 (see FIG. 1 ), which is/are fluidly connected to storage chambers of tank and pump units 160 and 162 .
- Said reductant refill inlet(s) 166 may be provided at movable service unit 115 .
- tank and pump units 160 and 162 may be provided with reductant refill inlets.
- Reductant is supplied from first and second tank and pump units 160 and 162 to SCR units 156 and 158 , respectively, via fluid connections (not shown).
- Said SCR units 156 and 158 include exhaust passages being fluidly connected to exhaust outlets of internal combustion engines 138 and 140 , for example, with flexible piping, because of potential relative movements between power module 114 and counterweight module 116 .
- SCR units 156 and 158 inject reductant from tank and pump units 160 and 162 into respective exhaust gas streams provided by engines 138 and 140 , and passing the exhaust passages of SCR units 156 and 158 .
- the injected reductant together with a suitable catalyzer structure housed in SCR units 156 and 158 ensures that a considerable amount of nitrogen oxides present in the exhaust gas streams is reduced to diatomic nitrogen and water. Then, the cleaned exhaust gas leaves SCR units 156 and 158 to the environment.
- operator cab module 118 may provide an operator seat 168 and a control panel 167 for an operator to control hydraulic mining shovel 100 as desired.
- control panel 167 may include joysticks, levers, buttons, and the like for propelling hydraulic mining shovel, and controlling operation of implement 108 , attachment 106 , and slewing gear device 110 .
- operator cab module 118 may further include interfaces, for example a display, for conveying information such as machine parameters and environmental conditions to an operator.
- a remote control and/or interface unit for the operator may be provided outside of operator cab module 118 , for example remote from hydraulic mining shovel 100 .
- Oil cooler module 132 is provided on an opposite side of mainframe 112 with respect to operator cab module 118 . In oil cooler module 132 , at least one oil cooler 170 is accommodated.
- FIG. 3 shows an arrangement of modules and components of superstructure 102 ′ very similar to the one shown in FIG. 2 except that first and second tank and pump units 160 ′ and 162 ′ are oriented in a different manner.
- first and second tank and pump units 160 ′ and 162 ′ are oriented such that their respective longitudinal axes D 1 ′ and D 2 ′ are parallel to longitudinal axes A, C 1 and C 2 .
- said arrangement provides the same advantages as the one shown in FIG. 2 , for example in terms of collision avoidance, operator safety, space-saving arrangement and configuration, and homogeneous mass distribution.
- FIGS. 4 and 5 for describing exhaust aftertreatment modules 120 and 121 in more detail. Specifically, in FIGS. 4 and 5 , second aftertreatment module 121 ′ is depicted. However, features described in the following may apply to both exhaust aftertreatment modules 120 and 121 if applicable and desired.
- a carrier structure 172 may be provided to support and fasten both reductant pump and tank unit 160 ′ and SCR unit 158 .
- exhaust aftertreatment module 121 ′ can be moved onto counterweight module 116 and installed thereon as a whole in one single step.
- carrier structure 172 may include at least one mounting unit (not shown in further detail) for lifting the same with a crane or the like.
- a common carrier structure may be provided for both exhaust aftertreatment modules 120 and 121 .
- the common carrier structure may be formed as an integral unit, or as two separate carrier structures 172 fastened to one another.
- first and second exhaust aftertreatment modules may be lifted and/or installed on hydraulic mining shovel 100 as a whole in one single step.
- carrier structure 172 may further include fastening units for realeasably securing exhaust aftertreatment module 121 ′ onto counterweight module 116 (see FIGS. 1 to 3 ).
- the fastening means may include bolts, screws or the like.
- a drip pan 174 is disposed below reductant tank and pump unit 162 ′ such that in the event of a leakage, the leaking highly-corrosive reductant can be collected in drip pan 174 instead of flowing into power module 114 and/or counterweight module 116 (see FIGS. 1 to 3 ), which may damage components accommodated therein, for example internal combustion engines 138 , 140 and engine coolers 152 and 154 .
- drip pan 174 may be integrated into carrier structure 172 .
- a volume of drip pan 174 may be not sufficient to collect the entire leaking reductant.
- a drainage mechanism may be included which ensures that in case drip pan 174 is almost entirely filled, the reductant is drained from the drip pan in a desired manner to ensure that the leaking reductant does not come into contact with any endangered component.
- a drainage mechanism may include relatively low-height side walls 176 of drip pan 174 in a region which would allow reductant to overflow in a direction away from power module 114 .
- a heat insulation wall 178 may be arranged between reductant tank and pump unit 162 ′ and SCR unit 158 to reduce a heat transfer from SCR unit 158 to reductant tank and pump unit 162 ′.
- Said heat insulation wall 178 allows to arrange reductant tank and pump unit 162 ′ and SCR unit 158 close together although the reductant in the storage chamber of reductant tank and pump unit 162 ′ is very sensitive to heat.
- heat insulation wall 178 may include a heat insulating material.
- heat insulation wall 178 may be releasably mounted to carrier structure 172 such that the same can be removed in case of very low temperatures, for example during winter, to allow a certain heat transfer which (slightly) warms the reductant, because the same may be also very sensitive to cold.
- module 121 ′ may further include a protection cover 180 covering reductant tank and pump unit 162 ′ and SCR unit 158 .
- Protection cover 180 may include lifting mounts 182 for moving and installing the same.
- protection cover 180 may cover reductant tank and pump unit 162 ′ or SCR unit 158 only.
- carrier structure 172 and its features is not limited to mirror-symmetrical arrangement and configurations of exhaust aftertreatment modules 120 , 121 as shown in FIGS. 2 and 3 , but may be used in other arrangements and configurations including, for example, other installation positions of the carrier structure on the hydraulic mining shovel, and more or less exhaust aftertreatment modules and internal combustion engines.
- the hydraulic mining shovel configuration disclosed herein is particularly applicable in hydraulic mining shovels requiring an exhaust aftertreatment device including an SCR unit.
- exhaust aftertreatment units 120 , 121 are substantially isolated against vibrations of internal combustion engines 138 , 140 due to their arrangement onto counterweight module 116 .
- the relatively small overall dimensions of exhaust aftertreatment modules 120 , 121 in combination with the non-projecting (or at least not substantially projecting) arrangement onto counterweight module 116 helps to avoid any collisions with material walls and vehicles.
- the modular construction allows retrofitting exhaust aftertreatment modules 120 , 121 , and eases and quickens installation of the same as all components of exhaust aftertreatment modules 120 , 121 can be assembled and connected with one another before actually installing modules 120 , 121 on hydraulic mining shovel 100 .
- mirror-symmetrical arrangement and configuration is meant to be understood in a generic manner. Specifically, the term refers to a situation in which the parts and units, which are essentially necessary for operation of the respective component or module, are mirrored. Hence, it is intended that features having no key functionality with respect to the desired function of the module do not necessarily have to be mirrored.
- a substantially mirror-symmetric arrangement and configuration with respect to exhaust aftertreatment modules 120 and 121 specifically means that both modules include substantially equal-constructed reductant tank and pump units 160 , 162 and substantially equal-constructed SCR units 156 , 158 in a substantially mirrored arrangement with respect to a reference axis.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
- The present disclosure relates to a hydraulic mining shovel, and more particularly to a hydraulic mining shovel configuration including an exhaust aftertreatment module with a selective catalytic reduction unit.
- In surface mining, hydraulic mining shovels (also referred to as large hydraulic excavators) may be used for digging and extracting material and minerals. For providing power to various components of the hydraulic mining shovel, the same may include one or more engines. For example, those engines may be electric motors or internal combustion engines such as diesel engines.
- Due to an increasing environmental consciousness and emission regulations, recent developments of engine manufacturers aim to reduce the emissions of internal combustion engines, for example emission of nitrogen oxides that may be generated during combustion in the internal combustion engine. A technique for reducing those nitrogen oxides is the so-called selective catalytic reduction (SCR). Typically, SCR aftertreatment units receive a stream of exhaust gas from an outlet of the internal combustion engine and treat the exhaust gas with a reductant such as urea to reduce nitrogen oxides therein to diatomic nitrogen and water.
- The present disclosure is directed, at least in part, to improving or overcoming one or more aspects of prior systems.
- In one aspect of the present disclosure, a hydraulic mining shovel is disclosed. The hydraulic mining shovel may comprise a main frame extending along a central longitudinal axis, and a power module mounted onto the main frame and including a first internal combustion engine and a second internal combustion engine. The hydraulic mining shovel may further comprise a counterweight module mounted onto the main frame and including a counterweight for maintaining stability of the hydraulic mining shovel. Still further, the hydraulic mining shovel may comprise a first exhaust aftertreatment module and a second exhaust aftertreatment module. Each of the first exhaust aftertreatment module and the second exhaust aftertreatment module may be mounted onto the counterweight module and may include a reductant tank and pump unit and a selective catalytic reduction unit. The reductant tank and pump unit may be configured to store and supply a reductant, and the selective catalytic reduction unit may be fluidly connected to the respective reductant tank and pump unit for receiving the reductant. The first exhaust aftertreatment module may be fluidly connected to the first internal combustion engine. The second exhaust aftertreatment module may be fluidly connected to the second internal combustion engine. The first exhaust aftertreatment module and the second exhaust aftertreatment module may be configured and arranged substantially mirror-symmetrically at opposing sides of the counterweight module with respect to the central longitudinal axis.
- In another aspect of the present disclosure, a carrier structure is disclosed. The carrier structure may be configured to support a reductant pump and tank unit, and a selective catalytic reduction unit. Further, the carrier structure may be configured to be releasably mounted on a hydraulic mining shovel, particularly onto a counterweight module of the hydraulic mining shovel.
- Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.
- The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate exemplary embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings:
-
FIG. 1 shows a side view drawing of an exemplary hydraulic mining shovel; -
FIG. 2 shows a schematic top view onto an exemplary superstructure; -
FIG. 3 shows a schematic top view onto another exemplary superstructure; -
FIG. 4 shows a drawing of an exemplary exhaust aftertreatment module; and -
FIG. 5 shows a drawing of the exemplary exhaust aftertreatment module including a cover. - The following is a detailed description of exemplary embodiments of the present disclosure. The exemplary embodiments described therein and illustrated in the drawings are intended to teach the principles of the present disclosure, enabling those of ordinary skill in the art to implement and use the present disclosure in many different environments and for many different applications. Therefore, the exemplary embodiments are not intended to be, and should not be considered as, a limiting description of the scope of patent protection. Rather, the scope of patent protection shall be defined by the appended claims.
- The present disclosure is based in part on the realization that a hydraulic mining shovel poses specific and challenging requirements for an optimized integration of an SCR aftertreatment unit. Particularly, it was found that an SCR aftertreatment unit and its components sum up to a considerable size, because the large internal combustion engines of a hydraulic mining shovel generate large amounts of exhaust gas to be treated by the SCR aftertreatment unit. Accordingly, herein, a modular construction of the SCR aftertreatment units is suggested, which includes all required components, partly integrated into sub-units for integrating different functionalities. Additionally, an arrangement of the SCR aftertreatment units is suggested, which considers the specific requirements of a hydraulic mining shovel in terms of collision avoidance, operator and machine safety, space-saving arrangement, and homogeneous mass distribution as is described in greater detail later on.
- The present disclosure is further based in part on the realization that a modular configuration of the aftertreatment unit in coordination with further modules and components of the hydraulic mining shovel allows to provide a plurality of construction kits for hydraulic mining shovels having a plurality of standardized parts while providing different exhaust aftertreatment capabilities. Specifically, based on national and regional emission regulations and customer requirements, a hydraulic mining shovel may require an SCR unit or not. By configuring the exhaust aftertreatment unit as a module, the same may be included or not as desired without affecting the presence, configuration and arrangement of the remaining parts and components of the hydraulic mining shovel such as the internal combustion engine(s). Furthermore, a modular configuration of the hydraulic mining shovel with respect to the exhaust aftertreatment module may facilitate retrofitting the exhaust aftertreatment module without requiring modifications and rearrangement of other components of the hydraulic mining shovel. Particularly, connecting parts and points for mounting the aftertreatment module and connecting the same to the internal combustion engine may be already present in a required configuration for receiving the aftertreatment module.
- Referring now to the drawings for describing an exemplary
hydraulic mining shovel 100 as shown inFIG. 1 . - In the shown embodiment of
FIG. 1 ,hydraulic mining shovel 100 comprises a superstructure (upper carriage) 102, anundercarriage 104, and anattachment 106 with animplement 108. A slewing gear device (swing gear device) 110 is mounted tosuperstructure 102 andundercarriage 104 to enable a relative rotary movement to occur betweensuperstructure 102 andundercarriage 104. -
Superstructure 102 includes a plurality of modules mounted to one another and/or to amain frame 112 extending longitudinally in a bottom region of superstructure 102 (inFIG. 1 a front end ofmain frame 112 is visible only). - The modules include a
power module 114, acounterweight module 116 with acounterweight 117, anoperator cab module 118, a firstexhaust aftertreatment module 120, and a second exhaust aftertreatment module and an oil cooler module (seeFIGS. 2 and 3 as both are not visible in the side view ofFIG. 1 ). Said modules are described in more detail herein under reference toFIGS. 2 to 5 . - In a bottom region of
power module 114, amovable service unit 115 is provided. Saidservice unit 115 may selectively move in direction toground surface 122 for providing access to refill inlets and/or control panels for an operator on ground level. During operation,service unit 115 may be retracted into an accommodation chamber inpower module 114, for example by means of a hydraulic actuator. In some embodiments, the retraction-and-extension-mechanism forservice unit 115 may be configured topivot service unit 115 out of its accommodation chamber. - Further,
undercarriage 104 includes a propulsion device for propellinghydraulic mining shovel 100 on awork surface 122. For example, the propulsion device may includetrack chains 124 and drive motors fordriving track chains 124. -
Attachment 106 includes work implement 108 such as a face shovel, which is movably mounted to a front end of astick 126 that is in turn movably mounted to aboom 128. A plurality ofhydraulic actuators 130 allow moving work implement 108, stick 126 andboom 128 as desired during mining operation. - Turning to
FIG. 2 for describing an exemplary layout concept of superstructure modules and their components. It is noted that inFIGS. 2 and 3 , modules and components are indicated in a schematic manner only. Furthermore, components accommodated inside a respective module are indicated by dashed lines, whereas solid lines indicate a visibility of the component in a top view ontosuperstructure 102 assuming that possibly existing covers are demounted. - As noted above and as can be seen in
FIG. 2 ,superstructure 102 includesmain frame 112,power module 114,counterweight module 116,operator cab module 118, first andsecond aftertreatment modules oil cooler module 132. - Further,
main frame 112 extends along a central longitudinal axis A and supportsmodules main frame 112 is shown in part only as it is partly overlapped, in particular, bypower module 114 andcounterweight module 116. Besides mounting structures for attachment 106 (seeFIG. 1 ) not shown in detail,main frame 112 further supports swing drives 134 and arotary distributor 136 for rotating slewing gear device 110 (seeFIG. 1 ). - Inside
power module 114, first and secondinternal combustion engines main frame 112. Additionally, for providing hydraulic power to various components ofhydraulic mining shovel 100, first and secondpump transfer gearboxes internal combustion engines respective couplings engines FIG. 2 , a space-saving arrangement may include that first and secondinternal combustion engines power module 114 with respect to central longitudinal axis A. In other embodiments, for example, first and secondinternal combustion engines power module 114 with respect to central longitudinal axis A. - Intake air is provided to
internal combustion engines air intake units top deck 150 ofpower module 114. Saidair intake units engines air intake units engines - For maintaining stability of
hydraulic mining shovel 100 during operation,counterweight module 116 includes counterweight 117 (seeFIG. 1 ).Counterweight module 116 is mounted ontomain frame 112 with a clearance topower module 114 for allowing relative movement betweenmodules counterweight module 116 is decoupled (isolated) against vibrations ofpower module 114, in particular, of first and secondinternal combustion engines second engine coolers counterweight module 116 for coolingengines - On a
top deck 164 ofcounterweight module 116, first and secondexhaust aftertreatment modules exhaust aftertreatment module pump unit unit exhaust aftertreatment modules top deck 164 ofcounterweight module 116 with respect to central longitudinal axis A. Additionally,SCR units units units SCR units FIG. 2 ,SCR units main frame 112, whereas reductant tank and pumpunits - In some embodiments, first and second
exhaust aftertreatment modules top deck 164 ofcounterweight module 116 with respect to central longitudinal axis A. For example, a substantially mirror-symmetrically arrangement may include installation tolerances, and/or merely relatively small deviations from a corresponding mirror-symmetrical arrangement, for instance, a single digit percentage deviation relative to a corresponding absolute mirror-symmetrical arrangement. - Above described arrangement and configuration of
exhaust aftertreatment modules exhaust aftertreatment modules internal combustion engines counterweight module 116. Further, first and secondexhaust aftertreatment modules modules counterweight module 116 in directions of central longitudinal axis A and perpendicular to central longitudinal axis A. Still further, as can be seen in conjunction withFIG. 1 ,modules FIG. 1 ) ontop decks top decks surface 122. Additionally, the mirror-symmetrical arrangement provides a homogeneous mass distribution acting ontocounterweight module 116, which further increases the stability ofhydraulic mining shovel 100 and may also allow to reduce a mass of counterweight 117 (seeFIG. 1 ) as such a mass reduction may be compensated byexhaust aftertreatment modules - First reductant tank and pump
units respective SCR units units hydraulic mining shovel 100. - Each storage chamber may have a capacity of several hundred liters, for example more than 500 liters, because the to-be-treated exhaust gas amount generated by
engines FIG. 1 ), which is/are fluidly connected to storage chambers of tank and pumpunits movable service unit 115. If a reductant refill is required, the operator may lowerservice unit 115 in direction to workingsurface 122 such that refilling reductant can be performed in a convenient manner from ground level. Additionally or alternatively, tank and pumpunits - Reductant is supplied from first and second tank and pump
units SCR units SCR units internal combustion engines power module 114 andcounterweight module 116. In operation,SCR units units engines SCR units SCR units SCR units - Furthermore,
operator cab module 118 may provide anoperator seat 168 and acontrol panel 167 for an operator to controlhydraulic mining shovel 100 as desired. For example,control panel 167 may include joysticks, levers, buttons, and the like for propelling hydraulic mining shovel, and controlling operation of implement 108,attachment 106, andslewing gear device 110. In some embodiments,operator cab module 118 may further include interfaces, for example a display, for conveying information such as machine parameters and environmental conditions to an operator. Additionally or alternatively, a remote control and/or interface unit for the operator may be provided outside ofoperator cab module 118, for example remote fromhydraulic mining shovel 100. - Oil
cooler module 132 is provided on an opposite side ofmainframe 112 with respect tooperator cab module 118. In oilcooler module 132, at least one oil cooler 170 is accommodated. - Referring now to
FIG. 3 , which shows an arrangement of modules and components ofsuperstructure 102′ very similar to the one shown inFIG. 2 except that first and second tank and pumpunits 160′ and 162′ are oriented in a different manner. - Specifically, in the embodiment shown in
FIG. 3 , first and second tank and pumpunits 160′ and 162′ are oriented such that their respective longitudinal axes D1′ and D2′ are parallel to longitudinal axes A, C1 and C2. Again, said arrangement provides the same advantages as the one shown inFIG. 2 , for example in terms of collision avoidance, operator safety, space-saving arrangement and configuration, and homogeneous mass distribution. - Referring now to
FIGS. 4 and 5 for describingexhaust aftertreatment modules FIGS. 4 and 5 ,second aftertreatment module 121′ is depicted. However, features described in the following may apply to bothexhaust aftertreatment modules - As can be seen in
FIG. 3 , acarrier structure 172 may be provided to support and fasten both reductant pump andtank unit 160′ andSCR unit 158. By mounting bothunits 160′ and 158 onto one carrier, namelycarrier structure 172,exhaust aftertreatment module 121′ can be moved ontocounterweight module 116 and installed thereon as a whole in one single step. For example,carrier structure 172 may include at least one mounting unit (not shown in further detail) for lifting the same with a crane or the like. - In some embodiments, a common carrier structure may be provided for both
exhaust aftertreatment modules separate carrier structures 172 fastened to one another. By providing a common carrier structure, first and second exhaust aftertreatment modules may be lifted and/or installed onhydraulic mining shovel 100 as a whole in one single step. - For allowing a quick installation, retrofit and replacement if required,
carrier structure 172 may further include fastening units for realeasably securingexhaust aftertreatment module 121′ onto counterweight module 116 (seeFIGS. 1 to 3 ). For example, the fastening means may include bolts, screws or the like. - Furthermore, a
drip pan 174 is disposed below reductant tank andpump unit 162′ such that in the event of a leakage, the leaking highly-corrosive reductant can be collected indrip pan 174 instead of flowing intopower module 114 and/or counterweight module 116 (seeFIGS. 1 to 3 ), which may damage components accommodated therein, for exampleinternal combustion engines engine coolers drip pan 174 may be integrated intocarrier structure 172. - As the reductant storage chamber of reductant tank and
pump unit 162′ may store several hundred liters of reductant, a volume ofdrip pan 174 may be not sufficient to collect the entire leaking reductant. A drainage mechanism may be included which ensures that incase drip pan 174 is almost entirely filled, the reductant is drained from the drip pan in a desired manner to ensure that the leaking reductant does not come into contact with any endangered component. For example, a drainage mechanism may include relatively low-height side walls 176 ofdrip pan 174 in a region which would allow reductant to overflow in a direction away frompower module 114. - Still further, a
heat insulation wall 178 may be arranged between reductant tank andpump unit 162′ andSCR unit 158 to reduce a heat transfer fromSCR unit 158 to reductant tank andpump unit 162′. Saidheat insulation wall 178 allows to arrange reductant tank andpump unit 162′ andSCR unit 158 close together although the reductant in the storage chamber of reductant tank andpump unit 162′ is very sensitive to heat. For example,heat insulation wall 178 may include a heat insulating material. - Moreover,
heat insulation wall 178 may be releasably mounted tocarrier structure 172 such that the same can be removed in case of very low temperatures, for example during winter, to allow a certain heat transfer which (slightly) warms the reductant, because the same may be also very sensitive to cold. - For protecting
exhaust aftertreatment module 121′ against direct sunlight, debris and oil vapor etc.,module 121′ may further include aprotection cover 180 covering reductant tank andpump unit 162′ andSCR unit 158.Protection cover 180 may include liftingmounts 182 for moving and installing the same. In some embodiments,protection cover 180 may cover reductant tank andpump unit 162′ orSCR unit 158 only. - As one skilled in the art will appreciate, application of
carrier structure 172 and its features is not limited to mirror-symmetrical arrangement and configurations ofexhaust aftertreatment modules FIGS. 2 and 3 , but may be used in other arrangements and configurations including, for example, other installation positions of the carrier structure on the hydraulic mining shovel, and more or less exhaust aftertreatment modules and internal combustion engines. - The hydraulic mining shovel configuration disclosed herein is particularly applicable in hydraulic mining shovels requiring an exhaust aftertreatment device including an SCR unit.
- By configuring the exhaust aftertreatment unit as a module in an arrangement and configuration as exemplary disclosed herein, various advantages may be achieved. For example,
exhaust aftertreatment modules internal combustion engines counterweight module 116. Further, the relatively small overall dimensions ofexhaust aftertreatment modules counterweight module 116 helps to avoid any collisions with material walls and vehicles. Additionally, the modular construction allows retrofittingexhaust aftertreatment modules exhaust aftertreatment modules modules hydraulic mining shovel 100. - As used herein, mirror-symmetrical arrangement and configuration is meant to be understood in a generic manner. Specifically, the term refers to a situation in which the parts and units, which are essentially necessary for operation of the respective component or module, are mirrored. Hence, it is intended that features having no key functionality with respect to the desired function of the module do not necessarily have to be mirrored. For example, a substantially mirror-symmetric arrangement and configuration with respect to
exhaust aftertreatment modules units SCR units - Although the preferred embodiments of this invention have been described herein, improvements and modifications may be incorporated without departing from the scope of the following claims.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15166177.4A EP3091128A1 (en) | 2015-05-04 | 2015-05-04 | Hydraulic mining shovel with scr unit |
EP15166177.4 | 2015-05-04 |
Publications (1)
Publication Number | Publication Date |
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US20160326718A1 true US20160326718A1 (en) | 2016-11-10 |
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Application Number | Title | Priority Date | Filing Date |
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US15/145,566 Abandoned US20160326718A1 (en) | 2015-05-04 | 2016-05-03 | Hydraulic mining shovel with scr unit |
Country Status (3)
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US (1) | US20160326718A1 (en) |
EP (1) | EP3091128A1 (en) |
AU (1) | AU2016202605A1 (en) |
Cited By (2)
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CN110552773A (en) * | 2018-06-01 | 2019-12-10 | 马尼托瓦克起重机有限责任公司 | Mounting arrangement of engine exhaust gas aftertreatment system on crane carrier |
US10815626B2 (en) | 2018-02-09 | 2020-10-27 | Wirtgen Gmbh | Earth working machine having a maintenance door offering storage space |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6509767B2 (en) * | 2016-03-15 | 2019-05-08 | 日立建機株式会社 | Construction machinery |
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WO2011027765A1 (en) * | 2009-09-02 | 2011-03-10 | 日立建機株式会社 | Wheel type working vehicle |
US20120055149A1 (en) * | 2010-09-02 | 2012-03-08 | Bucyrus International, Inc. | Semi-closed hydraulic systems |
JP2013181400A (en) * | 2012-02-29 | 2013-09-12 | Komatsu Ltd | Working machine |
US9702114B2 (en) * | 2012-04-03 | 2017-07-11 | Harnischfeger Technologies, Inc. | Counterweight system for an industrial machine |
US8695827B2 (en) * | 2012-05-01 | 2014-04-15 | Deere & Company | Diesel exhaust fluid and fuel fill system |
US9127435B2 (en) * | 2013-02-01 | 2015-09-08 | Caterpillar Global Mining Llc | Power shovel hoist machinery with auxiliary weight box |
NL2011673C2 (en) * | 2013-10-25 | 2015-04-29 | Ihc Holland Ie Bv | Drive system for a trailing dredger. |
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2015
- 2015-05-04 EP EP15166177.4A patent/EP3091128A1/en not_active Withdrawn
-
2016
- 2016-04-22 AU AU2016202605A patent/AU2016202605A1/en not_active Abandoned
- 2016-05-03 US US15/145,566 patent/US20160326718A1/en not_active Abandoned
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US9316136B2 (en) * | 2012-07-05 | 2016-04-19 | Komatsu Ltd. | Engine unit and work vehicle |
US20140039778A1 (en) * | 2012-08-02 | 2014-02-06 | Ford Global Technologies, Llc | Nox control during cylinder deactivation |
Cited By (3)
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US10815626B2 (en) | 2018-02-09 | 2020-10-27 | Wirtgen Gmbh | Earth working machine having a maintenance door offering storage space |
CN110552773A (en) * | 2018-06-01 | 2019-12-10 | 马尼托瓦克起重机有限责任公司 | Mounting arrangement of engine exhaust gas aftertreatment system on crane carrier |
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Also Published As
Publication number | Publication date |
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EP3091128A1 (en) | 2016-11-09 |
AU2016202605A1 (en) | 2016-11-24 |
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