CN113085529B - Hybrid power system of working machine and working machine - Google Patents
Hybrid power system of working machine and working machine Download PDFInfo
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- CN113085529B CN113085529B CN202110480218.1A CN202110480218A CN113085529B CN 113085529 B CN113085529 B CN 113085529B CN 202110480218 A CN202110480218 A CN 202110480218A CN 113085529 B CN113085529 B CN 113085529B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Operation Control Of Excavators (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention provides a hybrid power system of a working machine and the working machine, wherein the hybrid power system comprises a power switching device, a first power output end and a second power output end, wherein the power switching device comprises an input end, a first output end and a second output end, and the first output end and the second output end are selectively jointed with the input end of the power switching device; the power source comprises an engine and a motor connected with the engine, the output end of the power source is in power coupling connection with the input end of the power switching device, the driving shaft is in power coupling connection with the first output end and used for driving the chassis to run, and the hydraulic pump is in power coupling connection with the second output end. According to the hybrid power system, the motor is connected with the engine, so that hybrid power output can be conveniently realized, and the switching of a plurality of power modes can be conveniently realized through the switching of the power switching device, so that the working machine can work in a plurality of modes according to requirements, and the energy efficiency is higher in all modes.
Description
Technical Field
The present disclosure relates to working machines, and more particularly, to a hybrid power system for a working machine and a working machine.
Background
In the conventional working machines, a diesel engine is often used to output traction power and working driving force, and in order to achieve energy conservation and emission reduction, the electric working is an important development trend. In the prior art, for an electric working machine, on one hand, the motor needs to be powered by an engine, so that the energy efficiency is low, and on the other hand, for traction power or working driving force, only one power can be selected in a certain working process, so that the maximum load of the whole vehicle can be limited.
Disclosure of Invention
The invention provides a hybrid power system of a working machine and the working machine, which are used for solving the defects of low energy efficiency or weak power of the motorized working machine in the prior art, realizing the switching of multiple power modes and having higher energy efficiency in the various modes.
The present invention provides a hybrid system of a working machine, including:
a power switching device comprising an input, a first output and a second output, both of which are selectively engageable with the input of the power switching device;
the power source comprises an engine and a motor connected with the engine, and the output end of the power source is in power coupling connection with the input end of the power switching device;
the driving shaft is in power coupling connection with the first output end and is used for driving the chassis to run;
And the hydraulic pump is in power coupling connection with the second output end.
The hybrid power system of the working machine provided by the invention further comprises:
An energy storage device;
The controller comprises a control circuit and a DC/AC converter, wherein the control circuit is electrically connected with the engine and the energy storage device, and two ends of the DC/AC converter are respectively electrically connected with the energy storage device and the motor.
According to the hybrid power system of the working machine, which is provided by the invention, the hybrid power system is provided with a hybrid mode;
In the hybrid mode, the controller is configured to control the engine to operate, and simultaneously the energy storage device supplies power to the motor and the motor operates in an electric mode, and an input end of the power switching device is in power coupling connection with the first output end or the second output end.
According to the hybrid power system of the working machine, the motor is provided with a power generation mode, and the hybrid power system is provided with a recovery mode;
In the recovery mode, the motor works in a power generation mode, and the input end of the power switching device is in power coupling connection with the first output end or the second output end.
The hybrid power system of the working machine provided by the invention further comprises:
the plug connector is used for being electrically connected with an external power supply;
The controller also comprises an AC/DC converter and an AC/AC converter, wherein two ends of the AC/DC converter are respectively and electrically connected with the plug connector and the energy storage device, and two ends of the AC/AC converter are respectively and electrically connected with the plug connector and the motor.
According to the hybrid power system of the working machine provided by the invention, the hybrid power system is provided with a second hybrid operation mode;
in the second mixed operation mode, the controller is configured to control the engine to work, the plug is used for supplying power to the motor, the motor works in the electric mode, and the input end of the power switching device is in power coupling connection with the second output end.
According to the hybrid power system of the working machine, the control circuit is electrically connected with the hydraulic pump, the controller is arranged to control the engine to work when the motor works and the engine stops, and when the control circuit determines that the power of the hydraulic pump is larger than the rated power of the motor.
According to the hybrid power system of the working machine, the power source further comprises a transmission, the output end of the engine is in power coupling connection with the input end of the transmission, and the output end of the transmission is coaxially connected with the motor.
According to the hybrid power system of the working machine, the motor is provided with a power generation mode, the hybrid power system is provided with a charging mode, in the charging mode, the controller is arranged to control the engine and the motor to work simultaneously, the motor works in the power generation mode, and the transmission is switched to a neutral gear.
According to the hybrid power system of the working machine, the power source further comprises a speed changer, the output end of the engine is coaxially arranged with the motor, the output end of the motor is in power coupling connection with the input end of the speed changer, and the output end of the speed changer is in power coupling connection with the input end of the power switching device.
According to the hybrid power system of the working machine provided by the invention, the power source further comprises a transmission, and the motor is mounted on the transmission.
According to the hybrid power system of the working machine, the hydraulic pump comprises at least one of a main oil pump, a gear pump and a boom pump.
According to the hybrid power system of the working machine, the power switching device comprises a transfer case or a power takeoff.
The invention also provides a working machine, comprising the hybrid power system of any one of the working machines.
According to the hybrid power system of the working machine and the working machine, the motor is connected with the engine, so that hybrid power output can be conveniently realized, and the switching of a plurality of power modes can be conveniently realized through the switching of the power switching device, so that the working machine can work in a plurality of modes according to requirements, and the energy efficiency is high in all modes.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a hybrid powertrain of a work machine according to one embodiment of the present disclosure;
FIG. 2 is a second schematic diagram of a hybrid system of a work machine according to the present disclosure;
FIG. 3 is a third schematic illustration of a hybrid powertrain of a work machine according to the present disclosure;
fig. 4 is a schematic diagram of a control flow of a hybrid system of a work machine provided by the present disclosure.
Reference numerals:
The power switching device 110, the input end 111 of the power switching device, the first output end 112 of the power switching device, the second output end 113 of the power switching device, the first input gear 114a, the second input gear 114b, the first transmission gear 115, the second transmission gear 116, the first output gear 117, the second output gear 118 and the synchronizer 119;
an engine 121, a transmission 122, and a motor 123;
a transmission shaft 131, a driving shaft 132;
boom pump 141, main oil pump 142, hydraulic line 143, actuator 144;
the controller 151, the energy storage device 152, the plug 153.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
Descriptions of "such as," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The hybrid powertrain of the work machine of the present invention is described below with reference to fig. 1-3.
The working machine in the embodiment of the invention can be a pump truck, an automobile crane, an excavator, a pile driver, a concrete machine, a road roller, a stirring truck, a tunneling machine, a fire truck or the like.
As shown in fig. 1-3, the hybrid system of the work machine of the embodiment of the present invention includes a power switching device 110, a power source, a drive shaft 132, and a hydraulic pump.
The power switching device 110 includes an input 111, a first output 112, and a second output 113, where the first output 112 is selectively engageable with the input 111 of the power switching device 110, and the second output 113 is selectively engageable with the input of the power switching device 110.
The power coupling connection means that power transmission can be achieved between the components.
In some embodiments, the input 111 of the power switching device 110 is disconnected from the second output 113 when the input 111 of the power switching device 110 is in power coupling connection with the first output 112, and power can be transferred between the input 111 of the power switching device 110 and the first output 112, and the input 111 of the power switching device 110 is disconnected from the first output 112 when the input 111 of the power switching device 110 is in power coupling connection with the second output 113, and power can be transferred between the input 111 of the power switching device 110 and the second output 113.
In other embodiments, when the input 111 of the power switching device 110 is in power coupling connection with the first output 112, the input 111 of the power switching device 110 may be in power coupling connection with the second output 113, and the power input from the input 111 of the power switching device 110 may be distributed to the first output 112 and the second output 113.
The power switching device may include a transfer case or a power take-off.
As shown in fig. 1-3, in some embodiments, the power switching device 110 may include a first input gear 114a, a second input gear 114b, a first transfer gear 115, a second transfer gear 116, a first output gear 117, a second output gear 118, and a synchronizer 119.
The first input gear 114a and the second input gear 114b are coaxially and fixedly connected with the input end 111 of the power switching device 110, the first output gear 117 is fixedly connected with the first output end 112, the first transmission gear 115 is coaxially and fixedly connected with the second transmission gear 116, the second transmission gear 116 is meshed with the second output gear 118, the second output gear 118 is fixedly connected with the second output end 113, and the synchronizer 119 is used for controlling the first input gear 114a to be meshed with the first transmission gear 115 or controlling the second input gear 114b to be meshed with the first output gear 117 or in power coupling connection.
The input 111 is coupled with the first output 112 by power coupling when the synchronizer 119 synchronizes the second input gear 114b with the first output gear 117, and the input 111 is coupled with the second output 113 by power coupling when the synchronizer 119 synchronizes the first input gear 114a with the first transmission gear 115.
Of course, the power switching device 110 may also have other structural forms, including but not limited to a planetary gear mechanism, for example, a ring gear, a sun gear and a planet carrier of the planetary gear mechanism respectively form first to third ports, and during actual operation, one of the ring gear, the sun gear and the planet carrier is locked to realize power coupling connection of the other two, and of course, two of the ring gear, the sun gear and the planet carrier can also be used as a mixed input, and the other one can be used as an output.
The power source includes an engine and a motor 123, the motor 123 being coupled to the engine 121, such as the motor 123 being coaxially coupled to the engine 121. The output of the power source is coupled to the input 111 of the power switching device 110.
The engine achieves power output by burning fuel oil for converting chemical energy into mechanical energy.
The engine 121 may be a diesel engine or a gasoline engine, and a diesel engine may be selected for the work machine to provide more power.
The output shaft of the engine may be fixedly coupled coaxially with the motor shaft of the motor 123, such as, but not limited to, by a coupling, spline, or flange.
The power source may also include a transmission 122.
The motor 123 and the engine 121 may be connected directly or indirectly.
The connection location of the motor 123 to the engine may be varied, including but not limited to, the output of the engine 121 or the output of the transmission 122, as will be described in more detail in the following embodiments.
The output end of the power source may output the power of the engine 121 or the power of the motor 123 to the input end 111 of the power switching device 110, or may output the power of the engine 121 and the power of the motor 123 in a mixed manner to the input end 111 of the power switching device 110.
The drive shaft 132 is used to drive the chassis of the work machine, the drive shaft 132 is used to be in power coupling connection with the drive axle of the work machine, the drive axle of the work machine may include a differential, a left half axle and a right half axle, and the drive shaft 132 is used to be in power coupling connection with the input end of the differential.
The first output end 112 of the power switching device 110 is in power coupling connection with the driving shaft 132 in a manner including but not limited to through a structure such as a coupling, a spline or a flange, or as shown in fig. 1-3, the first output end 112 of the power switching device 110 is in power coupling connection with the driving shaft 132 through a transmission shaft 131, and the first output end 112 of the power switching device 110 is in power coupling connection with the driving shaft 132 in a manner including but not limited to through a structure such as a coupling, a spline or a flange, and the transmission shaft 131 is in connection with the driving shaft 132 in a manner including but not limited to through a structure such as a coupling, a spline or a flange.
Thus, when the input 111 of the power switching device 110 is in power coupling connection with the first output 112, the output of the power source may drive the work machine in a traveling mode, and the driving force may be the power of the engine or the power of the motor 123, or the hybrid power of the engine and the motor 123.
The hydraulic pump is in power coupling connection with the second output 113 of the power switching device 110, and the hydraulic pump can be used for driving an upper working system of the working machine, which is used for executing the working action of the working machine, and correspondingly, the structure of the hydraulic pump is different for different working machines.
In the case where the work machine is a pump truck, as shown in fig. 1-3, the hydraulic pump may include a boom pump 141 and a main oil pump 142, where the boom pump 141 and the main oil pump 142 are each in power coupling connection with the second output 113 of the power switching device 110. The boom pump 141 is used for controlling the boom of the pump truck to be unfolded or folded, and the main oil pump 142 is used for controlling the pumping of concrete. The main oil pump 142 may be connected to an actuator 144 via a hydraulic line 143. The hydraulic pump may also include a gear pump for driving the tilt cylinder in a swinging manner, and may also be used for driving the fan to dissipate heat. In addition, in other embodiments of the present application, the hydraulic pump may be one or two or three of the main oil pump, the gear pump and the boom pump.
In the case where the work machine is an automobile crane, the upper working system may include at least one of a boom mechanism, a telescopic mechanism, a hoisting mechanism, a swing mechanism, and the like. The input end of the hydraulic pump is in power coupling connection with the second output end 113 of the power switching device 110, and the hydraulic pump can be a plunger pump, an internal tooth pump, an external tooth pump or the like. The hydraulic pump can control the amplitude lifting mechanism, the telescopic mechanism, the winding mechanism, the rotation mechanism and the like.
It will be appreciated that for both the driving power of the work machine and the power source of the upper-load work system, the hybrid system of the work machine may provide at least a plurality of modes of operation:
first, a fuel drive mode.
The hybrid powertrain of the work machine may have a fuel drive mode, whether during operation of the drive train or the upper-loading work system.
During running, the engine works, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper working system works, the engine works, the motor 123 which is coaxially connected runs idle, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Under the fuel oil driving mode, the engine can improve sufficient power for the travelling crane or the upper-loading operation system, so that the travelling crane or the upper-loading operation system can meet various high-power operation requirements.
And secondly, a pure electric driving mode.
The hybrid system of the work machine may have a purely electric mode, whether during operation of the drive-on or off-board work system.
During driving, the engine is stopped, the motor 123 coaxially connected is operated, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper working system works, the engine is stopped, the motor 123 which is coaxially connected works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Under pure electric mode, can realize clean operation, reduce tail gas emission, and in the operation in-process, the noise is lower.
Third, hybrid drive mode.
The hybrid powertrain of the work machine may have a hybrid drive mode, whether during operation of the drive train or the on-board work system.
During running, the engine is operated, the motor 123 is operated, the output end of the power source can input the mixed power of the engine and the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
When the upper working system works, the engine works, the motor 123 works, the output end of the power source can input the mixed power of the engine and the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
In the hybrid driving operation mode, the power shortage during the driving by a single power source can be avoided by driving by two power sources, the output of the maximum power can be realized, and the maximum operation power of the operation machine is effectively improved.
According to the hybrid power system of the working machine, disclosed by the embodiment of the invention, the motor 123 is connected with the engine, so that the hybrid power output can be conveniently realized, and the switching of a plurality of power modes can be conveniently realized through the switching of the power switching device 110, so that the working machine can work in a plurality of modes according to requirements, and the energy efficiency is higher in each mode.
In some embodiments, as shown in FIGS. 1-3, the hybrid system may include an energy storage device 152 and a controller 151, the controller 151 including a control circuit and a DC/AC converter, the control circuit being electrically connected to the engine 121 and the energy storage device 152, and both ends of the DC/AC converter being electrically connected to the energy storage device 152 and the motor 123, respectively.
The electrical connection may be a wireless connection or a wired connection through a cable.
The control circuit is used to control the DC/AC inverter, the engine, the energy storage device 152 and the motor 123. The DC/AC inverter is used to effect conversion of direct and alternating currents between the energy storage device 152 and the motor 123.
Thus, the hybrid power system of the working machine can be switched into a pure electric drive mode or a hybrid drive mode when no external power supply exists. The energy storage device 152 may be a battery, such as a lead storage battery, a lithium iron phosphate battery, a ternary lithium battery, or other form of electrical energy storage structure.
In some embodiments, as shown in FIGS. 1-3, the hybrid system may include a plug for electrically connecting with an external power source.
The controller 151 includes an AC/DC converter and an AC/AC converter, both ends of the AC/DC converter are electrically connected to the plug and the energy storage device 152, respectively, and both ends of the AC/AC converter are electrically connected to the plug and the motor 123, respectively.
The AC/DC converter is used to convert AC power and DC power between the plug and the energy storage device 152. The AC/AC inverter is used to convert alternating current and alternating current between the plug and the motor 123.
The plug 153 may include a male plug or a female plug.
When the plug 153 is connected with an external power supply, the motor 123 can directly consume the electric energy of the external power supply to drive the upper operating system, and when the external power supply is the mains supply, the operating machine can keep long continuous operation time, and the operating process is clean and environment-friendly and has low noise.
In the actual operation process, the energy storage device 152 may be charged in advance, and the energy storage device 152 may be charged in various ways, which are described below from two implementation points of view:
First, the energy storage device 152 is charged by an external power source.
In this embodiment, the plug 153 is connected to an external power source, and the energy storage device 152 can be charged by the AC/DC converter of the controller 151.
And secondly, recovering energy of the working machine.
In this embodiment, the motor 123 is a motor generator, in other words, the motor 123 can output power when it is powered on, and the motor can generate power when it receives a power input. The two modes of operation of the motor 123 may be switched controlled by the controller 151.
The motor 123 has a power generation mode, the hybrid system has a recovery mode, in which the controller 151 is configured to control the motor 123 to operate in the power generation mode, the motor 123 generates power, and the input of the power switching device 110 is in power coupling connection with the first output 112 or the second output 113.
The reclamation modes include a first reclamation mode and a second reclamation mode;
In the first recovery mode, the controller 151 is configured to control the motor 123 to operate in a power generation mode, the motor 123 generates power, and the input end of the power switching device 110 is in power coupling connection with the first output end 112;
In the first recovery mode, the work machine is driven by the engine to rotate the drive shaft 132, thereby driving the work machine, the engine may not be operated when the brake is stepped on, the drive shaft 132 transmits power to the motor 123 through the transmission mechanism, and the motor 123 generates electricity to charge the energy storage device 152.
It can be appreciated that, by coaxially connecting the motor 123, the recovery of braking energy can be conveniently realized, the energy utilization efficiency is improved, and an independent energy recovery generator 123 is not required to be arranged, so that the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
In the second recovery mode, the controller 151 is configured to control the engine to operate, control the motor 123 to operate in the power generation mode, generate power from the motor 123, and the input end of the power switching device 110 is in power coupling connection with the second output end.
In the second recovery mode, the upper working system of the working machine works, and when the output power of the engine is larger than the required power of the hydraulic pump, the motor 123 is switched into the power generation mode, and the engine drives the motor 123 to generate power and the hydraulic pump to work simultaneously.
It can be understood that, through the coaxially connected motor 123, the distribution of the power output by the engine can be conveniently realized, the branch transmission is not needed, the energy utilization efficiency can be improved, an independent energy recovery generator 123 is not needed, the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
The hybrid powertrain provided by the present application may implement a variety of modes of operation, wherein fig. 4 illustrates the following first through eighth modes of operation, but the present application is not limited to these 8 modes of operation, such as the energy recovery mode, and may have other operating conditions in addition to the pumping conditions illustrated in fig. 4.
First, the hybrid system provided by the invention has a fuel running mode.
In the fuel running mode, the controller 151 is configured to control the engine to operate, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
Secondly, the hybrid power system provided by the invention has a fuel oil operation mode.
In the fuel operation mode, the controller 151 is configured to control the engine to operate, the coaxially connected motor 123 idles, the output end of the power source can input the power of the engine to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Third, the hybrid power system provided by the invention has a pure electric mode.
In the pure electric driving mode, the controller 151 is configured to control the engine to be turned off, the motor 123 is powered by the energy storage device 152, the motor 123 works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112, and the driving shaft 132 is driven.
Fourth, the hybrid system provided by the invention has a first pure electric mode of operation.
In the first pure electric operation mode, the controller 151 is configured to control the engine to be turned off, the motor 123 is powered by the energy storage device 152, the motor 123 works, the output end of the power source can input the power of the motor 123 to the second output end 113 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
Fifth, the hybrid system provided by the invention has a second pure electric mode of operation.
In the second pure electric operation mode, the plug 153 is connected to an external power supply, the controller 151 is configured to control the engine to be turned off, the motor 123 is powered by the external power supply, the motor 123 works, the output end of the power source can input the power of the motor 123 to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113, and the hydraulic pump is driven.
The hybrid power system provided by the invention has a hybrid mode in which the controller is configured to control the engine to operate, while the energy storage device 152 supplies power to the motor 123, and the motor 123 operates in an electric mode, and the input 111 of the power switching device 110 is in power coupling connection with the first output 112 or the second output 113. When the motor 123 is operated in the electric mode, the motor 123 may convert electric energy into mechanical energy.
The hybrid mode may include a hybrid travel mode and a first hybrid operation mode.
Sixth, the hybrid power system provided by the invention has a hybrid running mode.
In the hybrid driving mode, the controller 151 is configured to control the engine and the motor 123 to operate, the energy storage device 152 supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, the input end 111 of the power switching device 110 is in power coupling connection with the first output end 112 of the power switching device 110, and the driving shaft 132 is driven.
The controller 151 may control the rotational speed and power of the engine and the motor 123, so that the power and economy of running of the work machine may be improved.
Seventh, the hybrid power system provided by the invention has a first hybrid operation mode;
In the first hybrid operation mode, the controller 151 is configured to control the engine and the motor 123 to operate, the energy storage device 152 supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, and the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113 of the power switching device 110, and the hydraulic pump is driven.
The controller 151 may control the rotation speed and power of the engine and the motor 123, so that the output power of the hydraulic pump meets the operation requirement of the upper-loading operation system (such as the pumping system), and the energy storage device 152 may be powered to complete the operation in the area where the power connection is inconvenient.
Eighth, the hybrid power system provided by the invention has a second hybrid operation mode;
in the second hybrid operation mode, the controller 151 is configured to control the engine and the motor 123 to operate, the external power source connected to the plug supplies power to the motor 123, the motor 123 operates in the electric mode, the output end of the power source can input hybrid power to the input end 111 of the power switching device 110, and the input end 111 of the power switching device 110 is in power coupling connection with the second output end 113 of the power switching device 110, so that the hydraulic pump is driven.
The controller 151 can control the rotation speed and power of the engine and the motor 123, so that the output power of the hydraulic pump meets the operation requirement of an upper-loading operation system (such as a pumping system), and the power supply of the external power supply can ensure long-time operation.
And ninth, the hybrid power system provided by the invention has a power generation mode.
In the power generation mode, the controller 151 is configured to control the engine to operate, and to control the motor 123 to enter the power generation mode, the motor 123 is driven by the engine to generate power, and the amount of power generated by the motor 123 is stored in the energy storage device 152. When the motor 123 is controlled to enter the power generation mode, the motor 123 is configured to convert mechanical energy into electrical energy.
Tenth, the hybrid system provided by the invention has a charging mode.
In the charging mode, the plug 153 is connected to an external power source, and the controller 151 controls the external power source to charge the energy storage device 152.
Eleven, the hybrid power system provided by the invention has a braking energy recovery mode.
In the braking recovery mode, the controller 151 is configured to control the engine to operate, control the motor 123 to generate electricity, and the input end of the power switching device 110 is in power coupling connection with the first output end 112;
The driving shaft 132 is driven to rotate by the engine 121 to drive the driving shaft 132, and when the driving shaft 132 is used for stepping on the brake, the power is transmitted to the motor 123 through the transmission mechanism, and the motor 123 generates electricity to charge the energy storage device 152.
It can be appreciated that, by coaxially connecting the motor 123, the recovery of braking energy can be conveniently realized, the energy utilization efficiency is improved, and an independent energy recovery generator 123 is not required to be arranged, so that the transmission path from the motor 123 to the braking energy is short, and the recovery efficiency is high.
In the present application, the motor may idle when not in operation.
On the basis of any one of the above embodiments, three embodiments of the present invention will be described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the power source may further include a transmission 122, an output of the engine 121 is coupled to an input of the transmission 122, and an output of the transmission 122 is coaxially connected to the motor 123.
The electric machine 123 has a generating mode and the hybrid system has a charging mode, in which the controller is arranged to control the engine 121, the transmission 122 and the electric machine 123 to operate simultaneously and the electric machine 123 to operate in the generating mode.
In the charging mode, the transmission 122 is engaged in the target gear (non-neutral gear), the driving motor 123 generates power to charge the energy storage device 152, and the input end 111 of the power switching device 110 is coupled to the second output end 113, i.e. operates in the pumping mode, and the hydraulic pump can idle without working externally.
Thus, the internal connection structure of the traditional engine is not required to be changed, the motor 123 is only required to be additionally arranged outside, the modification is convenient, and when braking energy is recovered, the power transmission path is short, and the recovery efficiency is high.
The motor 123 may be mounted on the transmission 122, and may be mounted on a case of the transmission 122. The power switching device 110 may be installed in an on-board system, and the hybrid power system only needs to replace the chassis with a hybrid chassis, and the on-board system may be basically unchanged, so that the replacement is simple and the cost is saved. Moreover, due to the gearbox 122, the speed change can be realized in a driving condition or in a pumping condition.
Example two
As shown in fig. 2, the power source may further include a transmission 122, and an output of the engine 121 is coupled to an input of the transmission 122 by a motor 123. The engine 121 is coaxially arranged with the motor 123, the output end of the motor 123 is in power coupling connection with the input end of the transmission 122, and the output end of the transmission 122 is in power coupling connection with the input end 111 of the power switching device 110.
In other words, the output end of the engine 121 is in power coupling connection with the motor shaft of the motor 123, and the motor shaft of the motor 123 is in power coupling connection with the input end of the transmission 122.
The electric machine 123 has a generating mode and the hybrid powertrain has a charging mode, in which the controller is configured to control the engine 121 and the electric machine 123 to operate simultaneously and the electric machine 123 to operate in the generating mode, the transmission 122 is shifted to neutral.
For the hybrid power system, after the transmission 122 is shifted to neutral gear, the motor 123 can be directly driven by the engine 121 to generate power, and electric energy is stored in the power energy storage device 152.
The motor 123 may be mounted on the transmission 122, and may be mounted on a case of the transmission 122. The power switching device 110 may be installed in an on-board system, and the hybrid power system only needs to replace the chassis with a hybrid chassis, and the on-board system may be basically unchanged, so that the replacement is simple and the cost is saved. Moreover, due to the gearbox 122, the speed change can be realized in a driving condition or in a pumping condition.
Example III
As shown in fig. 3, the control circuit is electrically connected to the hydraulic pump. For example, in fig. 3, the control circuit of the controller 151 is electrically connected to the boom pump 141 and the main oil pump 142.
The controller 151 is configured to control the engine to operate when the motor 123 is operated and the engine is stopped, and when the control circuit determines that the power of the hydraulic pump is greater than the rated power of the motor 123.
Thus, the hybrid power system can be automatically switched to a hybrid operation mode, and automatic intervention of the engine is realized. Of course, the user can also manually control the engine to work, so that the manual switching of the mixing operation is realized.
For such a hybrid system, the controller 151 may monitor the operating state of the hydraulic pump, automatically control the engine intervention, and avoid the insufficient output power of the motor 123 in the operating mode.
In the first pure electric mode, the controller 151 may monitor that the power of the hydraulic pump is greater than the rated power of the motor 123, or that the speed-up of the hydraulic pump is greater than the target value, and may control the hybrid system to switch into the first hybrid electric mode.
In the second pure electric mode, the controller may monitor the power of the hydraulic pump greater than the rated power of the motor 123, or monitor the speed increase of the hydraulic pump greater than a target value, and may control the hybrid system to switch into the second hybrid mode.
The invention also provides a working machine.
The working machine in the embodiment of the invention can be a pump truck, a vehicle-mounted pump, an automobile crane, an excavator, a pile driver, a concrete machine, a road roller, a mixer truck, a tunneller, a fire truck or the like.
The work machine of an embodiment of the present invention includes the hybrid system of the work machine of any of the embodiments described above.
According to the working machine of the embodiment of the invention, the motor 123 and the engine are coaxially arranged, so that the hybrid power output can be conveniently realized, and the switching of a plurality of power modes can be conveniently realized through the switching of the power switching device 110, so that the working machine can work in a plurality of modes according to requirements, and the energy efficiency in each mode is higher.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (13)
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| CN114801687A (en) * | 2022-05-31 | 2022-07-29 | 三一汽车起重机械有限公司 | Crane hybrid power system and control method |
| CN217514956U (en) * | 2022-08-01 | 2022-09-30 | 三一重型装备有限公司 | Hybrid power system and working machine |
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| US20090095548A1 (en) * | 2005-02-28 | 2009-04-16 | Nt Consulting International Pty Limited | Drive system with fluid pump |
| US7706949B2 (en) * | 2006-05-25 | 2010-04-27 | Gm Global Technology Operations, Inc. | Method and apparatus to control an electro-mechanical transmission during shifting event |
| WO2010054210A1 (en) * | 2008-11-07 | 2010-05-14 | Ricardo, Inc. | Multi-mode hybrid transmission |
| JP5227981B2 (en) * | 2010-01-22 | 2013-07-03 | 日立建機株式会社 | Hybrid work machine |
| JP2013203381A (en) * | 2012-03-29 | 2013-10-07 | Honda Motor Co Ltd | Drive device for vehicle |
| CN108215761B (en) * | 2016-12-12 | 2024-08-02 | 宇通客车股份有限公司 | Vehicle, series-parallel hybrid power system and hybrid power system control method |
| US10844942B2 (en) * | 2017-01-06 | 2020-11-24 | Federal Signal Corporation | Power split and variable creep drive system for street sweeper or like specialty vehicle |
| CN109057348A (en) * | 2018-10-17 | 2018-12-21 | 三汽车制造有限公司 | Pump truck |
| CN111216540B (en) * | 2020-01-08 | 2022-11-18 | 同济大学 | Tractor electric drive parallel hybrid power system and control method thereof |
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