CN112874325A - Power system and crane - Google Patents
Power system and crane Download PDFInfo
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- CN112874325A CN112874325A CN202110343313.7A CN202110343313A CN112874325A CN 112874325 A CN112874325 A CN 112874325A CN 202110343313 A CN202110343313 A CN 202110343313A CN 112874325 A CN112874325 A CN 112874325A
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- module
- power supply
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- electric energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
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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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- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power system and a crane, which comprise a motor, a range extending module, a towing module, a battery module and a controller, wherein the range extending module is arranged on the motor; the range extending module comprises an engine and a generator which are mechanically connected, and the engine is used for driving the generator to generate electric energy; the mopping module is used for being connected with an external power supply and obtaining electric energy from the external power supply; the controller is electrically connected with the range extending module, the towing module and the battery module respectively, and is used for acquiring a real-time load of a load connected with the motor and controlling the range extending module, the towing module and the battery module to provide electric energy for the motor based on the real-time load. The power system and the crane provided by the invention have a power solution scheme of extended range type and drag type, can provide high-efficiency and environment-friendly power, and can meet the use requirements of a plurality of scenes.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a power system and a crane.
Background
Electric cranes are increasingly used in various engineering work scenarios. The electric crane provides power for running and hoisting work by means of the power battery, and the power battery needs to be charged before the work. Because the operation place of the electric crane is not fixed, the electric crane can often work in scenes with severe conditions, such as field operation scenes, so that a stable charging power supply can not be provided for a power battery, the operation time of the electric crane is short, the operation efficiency is low, and the electric crane can not meet the requirements of various operation scenes.
Disclosure of Invention
The invention provides a power system and a crane, which are used for solving the technical problems that the crane is short in operation time, low in operation efficiency and incapable of meeting the requirements of various operation scenes.
The invention provides a power system, which comprises a motor, a range extending module, a towing module, a battery module and a controller, wherein the range extending module is arranged on the motor;
the range extending module comprises an engine and a generator which are mechanically connected, and the engine is used for driving the generator to generate electric energy;
the mopping module is used for being connected with an external power supply and obtaining electric energy from the external power supply;
the controller is electrically connected with the range extending module, the towing module and the battery module respectively, and is used for acquiring a real-time load of a load connected with the motor and controlling at least one of the range extending module, the towing module and the battery module to provide electric energy for the motor based on the real-time load.
According to the power system provided by the invention, the controller comprises a load acquisition unit, a state acquisition unit and a power supply control unit;
the load acquisition unit is used for acquiring a real-time load of a load connected with the motor;
the state acquisition unit is used for acquiring the connection state between the mop module and an external power supply;
the power supply control unit is electrically connected with the load acquisition unit and the state acquisition unit respectively, and is used for controlling at least one of the range extending module, the towing module and the battery module to provide electric energy for the motor based on the real-time load and the connection state between the towing module and an external power supply.
According to the power system provided by the invention, the power supply control unit is specifically used for:
and when the connection state between the mopping module and the external power supply is connection, controlling the mopping module to provide electric energy for the motor.
According to the power system provided by the invention, the power supply control unit is specifically used for:
when the connection state between the mopping module and an external power supply is not connected, if the real-time load is smaller than a first set load value, controlling the battery module to provide electric energy for the motor;
the first set load value is determined based on a remaining capacity of the battery module.
According to the power system provided by the invention, the power supply control unit is specifically used for:
when the mop module is not connected with the external power supply,
if the real-time load is greater than or equal to a first set load value and less than or equal to a second set load value, controlling the range extending module to provide electric energy for the motor;
the second set load value is determined based on a power rating of the range module.
According to the power system provided by the invention, the power supply control unit is specifically used for:
when the connection state of the towing module is not connected with an external power supply, if the real-time load is greater than a second set load value, the range extending module and the battery module are controlled to provide electric energy for the motor.
According to the power system provided by the invention, the battery module is electrically connected with the range extending module;
the controller comprises a recovery control unit, and the recovery control unit is used for controlling the battery module to recover the output electric energy of the range-extended module if the real-time load is smaller than the output power of the range-extended module when the range-extended module provides the electric energy for the motor.
According to the power system provided by the invention, the towing module is electrically connected with the battery module;
the controller comprises a charging control unit, and is used for controlling the mop module to charge the battery module if the electric quantity of the battery module is smaller than a set value when the mop module is connected with an external power supply.
According to the power system provided by the invention, the towing module is provided with a movable socket for detachably connecting with the external power supply.
The invention also provides a crane comprising the power system.
The power system and the crane provided by the invention comprise a motor, a range extending module, a towing module, a battery module and a controller, wherein the controller acquires a real-time load of a load connected with the motor and controls the range extending module, the towing module and the battery module to provide electric energy for the motor according to the real-time load.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a power system according to the present invention;
FIG. 2 is a schematic structural diagram of a range extending module according to the present invention;
FIG. 3 is a schematic structural diagram of a controller according to the present invention;
FIG. 4 is a second schematic structural diagram of a power system provided in the present invention;
FIG. 5 is a second schematic structural diagram of a controller according to the present invention;
FIG. 6 is a third schematic structural diagram of a power system provided in the present invention;
FIG. 7 is a third schematic structural diagram of a controller according to the present invention;
FIG. 8 is a schematic structural view of a crawler crane with power-driven and range-extended functions according to the present invention;
fig. 9 is a schematic diagram of energy transfer of the crawler crane with power supply and range increasing function provided by the present invention.
Reference numerals:
100: a power system; 110: an electric motor;
120: a range extending module; 130: a dragging module;
140: a battery module; 150: a controller;
151: a load acquisition unit; 152: a state acquisition unit;
153: a power supply control unit; 154: a recovery control unit;
155: a charging control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a power system provided by the present invention, and as shown in fig. 1, the power system 100 includes a motor 110, a range extending module 120, a towing module 130, a battery module 140, and a controller 150; the dashed lines represent signal control connections and the solid lines represent power transfer connections.
The range extending module 120 comprises an engine 121 and a generator 122 which are mechanically connected, wherein the engine 121 is used for driving the generator 122 to generate electric energy; a towing module 130 for connecting with an external power source and obtaining electric energy from the external power source; and the controller 150 is electrically connected with the range extending module 120, the towing module 130 and the battery module 140, and is configured to obtain a real-time load of a load connected with the motor 110 and control at least one of the range extending module 120, the towing module 130 and the battery module 140 to provide electric energy for the motor 110 based on the real-time load.
Specifically, the working machine is a machine for performing a construction work, and includes a mixer truck, a crane, a bulldozer, an excavator, and the like. Power system 100 is provided in a work machine and provides power for travel and operation of the work machine. For example, when the work machine is an electric crane, the power system 100 may drive a hydraulic pump of the electric crane to drive hydraulic oil to provide power for each execution structure of the electric crane, so that the electric crane may complete a hoisting task. The power system 100 may also drive the wheels or tracks of the electric hoist so that the electric hoist travels between multiple work areas.
The power system 100 includes an electric motor 110, a range extending module 120, a tow electric module 130, a battery module 140, and a controller 150. The motor 110 is connected to a load to drive the load to perform various operations. The load may be a hydraulic device, a drive device, or the like. The range extending module 120, the towing module 130 and the battery module 140 are electrically connected to the motor 110, respectively, to provide electric power to the motor 110.
The range extending module 120 provides electrical energy to the motor by converting chemical energy to electrical energy. Fig. 2 is a schematic structural diagram of the range extending module provided by the present invention, and as shown in fig. 2, the range extending module 120 includes an engine 121 and a generator 122 which are mechanically connected. The engine 121 and the generator 122 may be coaxially connected. The engine 121 may be an internal combustion engine, such as a diesel engine or a gasoline engine. The engine 121 converts chemical energy of the fuel into mechanical energy, which rotates the generator 122. The generator 122 converts the mechanical energy into electrical energy.
The towing module 130 is connected to an external power source and obtains power from the external power source. For example, the external power source may be a power grid or a large electrical energy storage device.
The battery module 140 may be charged and discharged. The battery module 140 may be charged when the power system 100 is not operating, and the battery module 140 may provide electrical energy to the motor 110 by discharging when the power system 100 is operating. The battery module 140 may be a lithium-ion polymer battery, a lithium-iron-phosphate battery, or the like.
The controller 150 is electrically connected to the range extending module 120, the towing module 130, and the battery module 140, respectively, obtains a real-time load of a load connected to the motor 110, and controls the range extending module 120, the towing module 130, and the battery module 140 to provide electric energy to the motor 110 according to the real-time load.
The controller 150 may select one or more of the range module 120, the tow-out module 130, and the battery module 140 to provide power to the motor 110 based on the real-time load. For example, if the real-time load is small, the controller 150 may select the battery module 140 to provide power to the motor 110, and if the real-time load is large, the controller 150 may select the range extending module 120 and the battery module 140 to provide power to the motor 110 together. In the case where the external power source is available, the controller 150 may also select the towing module 130 to provide the electric power to the electric motor 110, and at this time, the engine 121 and the generator 122 in the range extending module 120 may not operate, and only rely on the external power source to provide the electric power to the power system 100.
Compared with the conventional power system, the power system 110 provided by the embodiment of the invention has multiple electric energy sources, and can utilize the electric energy pre-stored in the battery module 140 and the electric energy provided by the range extending module 120 and/or the towing module 130.
The power system provided by the embodiment of the invention comprises the motor, the range extending module, the towing module, the battery module and the controller, wherein the controller acquires a real-time load of a load connected with the motor and controls the range extending module, the towing module and the battery module to provide electric energy for the motor according to the real-time load.
Based on the above embodiment, fig. 3 is a schematic structural diagram of a controller provided by the present invention, and as shown in fig. 3, the controller 150 includes a load obtaining unit 151, a state obtaining unit 152, and a power supply control unit 153;
a load obtaining unit 151 electrically connected to the power supply control unit 153, for obtaining a real-time load of a load connected to the motor 110;
a state obtaining unit 152 electrically connected to the power supply control unit 153, for obtaining a connection state between the mop module and an external power supply;
the power supply control unit 153 is configured to control at least one of the range extending module 120, the towing module 130, and the battery module 140 to supply power to the motor 110 based on the real-time load and the connection state between the towing module 130 and the external power source.
Specifically, the load acquisition unit 151 is configured to acquire a real-time load of a load connected to the motor 110 and transmit the real-time load to the electrically connected power supply control unit 153, so that the power supply control unit 153 performs power supply control.
The load is mechanically connected to the motor 110. The load is a device or apparatus that converts electromagnetic torque provided by the motor 110 into mechanical torque and performs work to the outside. For example, if the power plant 100 is provided on an electric crane, the load may be a hydraulic pump. The motor 110 is directly connected with the hydraulic pump or connected with the hydraulic pump through a gearbox, converts electric energy into mechanical energy of the hydraulic pump, pushes hydraulic oil to do work outwards, and drives a mechanical arm of the electric crane to lift a heavy object. At this time, the output power that the hydraulic pump needs to provide externally is the real-time load of the hydraulic pump. The electric hoist may include a power conversion means to determine an output power of the hydraulic pump according to the weight of the weight to be lifted and transmit the output power as a real-time load to the load acquisition unit 151.
The state acquiring unit 152 is configured to acquire a connection state between the mop module 130 and an external power source, and send the connection state to the electrically connected power supply control unit 153. The connection state includes connected and unconnected.
A voltage or current detection means may be provided in the mop module 130 for detecting an external power source. If the external voltage or current is detected, the state obtaining unit 152 determines that the connection state between the mop module 130 and the external power source is connected, and if the external voltage or current is not detected, the state obtaining unit 152 determines that the connection state between the mop module 130 and the external power source is not connected.
The power supply control unit 153 flexibly selects the range extending module 120, the towing module 130 and the battery module 140 to provide electric energy for the motor 110 according to the real-time load and the connection state between the towing module 130 and the external power source. For example, if the real-time load is large, a plurality of modules may be selected to provide power together. If the mop module 130 is connected to an external power source, the external power source is preferably selected.
Based on any of the above embodiments, the power supply control unit 153 is specifically configured to:
when the connection state between the mop module 130 and the external power source is connected, the mop module 130 is controlled to provide power for the motor 110.
Specifically, when the construction site allows, the towing module 130 is connected to an external power source, and may preferentially obtain electric energy from the external power source, and at this time, both the range extending module 120 and the battery module 140 may not operate. The engine in the range module 120 is not operating, reducing pollution and consumption from fuel. The battery module 140 does not work, so that the charging and discharging times are reduced, and the service life of the battery is prolonged.
Preferably, the external power source is a power grid. The cost of using the electrical energy in the grid is low.
Based on any of the above embodiments, the power supply control unit 153 is specifically configured to:
when the connection state between the towing module 130 and the external power source is not connected, if the real-time load is smaller than the first set load value, the battery module 140 is controlled to provide the electric power for the motor.
Specifically, the first set load value is used for measuring the real-time load, and may be determined according to the remaining capacity of the battery module 140.
When the connection state between the towing module 130 and the external power source is disconnected, it indicates that the working environment does not have available external power source. If the real-time load is smaller than the first set load value, it indicates that the real-time load of the load is within the load-bearing range of the battery module 140. The power supply control unit 153 may selectively control the battery module 140 to supply power to the motor 110.
For example, when an electric hoist performs a transition task, only a small portion of power is required to drive the wheels for movement between work areas. At this time, the motor 110 is connected to the wheel drive apparatus, and the real-time load of the wheel drive apparatus is small and lower than the first set load value. At this time, the battery module 140 is controlled to supply the electric motor 110 with electric energy without activating the range extending module 120.
Based on any of the above embodiments, the power supply control unit 153 is specifically configured to:
when the connection state of the towing module 130 is not connected to the external power source, if the real-time load is greater than or equal to the first set load value and less than or equal to the second set load value, the range extending module 120 is controlled to provide electric energy for the motor 110;
the second set load value is determined based on the power rating of the range extender module 120.
Specifically, the second set load value is used for measuring the real-time load, and may be determined according to the rated power of the range extending module 120.
When the connection state of the towing module 130 is not connected to the external power source, if the real-time load is greater than or equal to the first set load value, it indicates that the real-time load of the load exceeds the bearing range of the battery module 140; if the real-time load is less than or equal to the second set load value, it indicates that the real-time load of the load is within the load-bearing range of the range-extending module 120. The power supply control unit 153 may selectively control the range extending module 120 to provide power to the motor 110.
For example, when an electric crane performs a hoisting task, a large amount of power is required for driving a hydraulic pump for driving a mechanical arm to lift a heavy object. At this time, the motor 110 is connected to the hydraulic pump, and the real-time load of the hydraulic pump is large, larger than the first set load value and smaller than the second set load value, and exceeds the load range of the battery module 140. At this time, the control range extender module 120 provides electrical energy to the electric motor 110. The power supply control unit 153 may send a start instruction to the engine 121 to coaxially rotate the generator 122 to generate electric power.
Based on any of the above embodiments, the power supply control unit 153 is specifically configured to:
when the towing module 130 is not connected to the external power source, if the real-time load is greater than the second set load value, the range extending module 120 and the battery module 140 are controlled to provide power for the motor.
Specifically, when the connection state of the towed module 130 is not connected to the external power source, if the real-time load is greater than the second set load value, it indicates that the real-time load of the load exceeds the bearing range of the range extending module 120. The power supply control unit 153 may selectively control the range extending module 120 and the battery module 140 to supply power to the motor.
For example, when an electric crane performs a hoisting task, a large amount of power is required for driving a hydraulic pump for driving a mechanical arm to lift a heavy object. At this time, the motor 110 is connected to the hydraulic pump, and the real-time load of the hydraulic pump is larger than the second set load value, which exceeds the bearing range of the range extending module 120.
At this time, the power supply control unit 153 sends a start instruction to the engine 121 while controlling the battery module 140 to supply power to the motor, and coaxially drives the generator 122 to rotate to generate power, so that the range extending module 120 also supplies power to the motor 110.
According to any of the above embodiments, the battery module 140 is electrically connected to the range extending module 120;
the controller 150 includes a recovery control unit 154 for controlling the battery module 140 to recover the output power of the range module 120 if the real-time load is less than the output power of the range module 120 when the range module 120 supplies the electric power to the motor 110.
Specifically, the range module 120 operates with the engine 121 generally operating at a set speed. For example, the engine 121 is typically operated at an economical speed, where fuel consumption is lowest and torque is highest, the economical speed being determined based on performance parameters of the engine 121 and fuel consumption. When the range extending module 120 is in operation, the real-time load of the load is not fixed, and the power consumed by the motor 110 needs to be adjusted accordingly according to the change of the real-time load, that is, the power supply of the motor 110 needs to be adjusted. At this time, if the rotation speed of the engine 121 in the range-extending module 120 is frequently adjusted, so as to change the output electric energy of the generator 122, the economy of the range-extending module 120 will be deteriorated, the fuel consumption and the emission will be increased, and the stability of the electric energy output will be deteriorated.
Fig. 4 is a second schematic structural diagram of the power system provided by the present invention, and as shown in fig. 4, the battery module 140 is electrically connected to the range extending module 120, in which the dashed line represents a signal control connection and the solid line represents an electric energy transmission connection. The electrical energy generated by the range extension module 120 may be stored in the battery module 140. Fig. 5 is a second schematic structural diagram of the controller according to the present invention, and as shown in fig. 5, the controller 150 includes a recycling control unit 154. When the range-extending module 120 supplies electric energy to the electric motor 110, if the real-time load is smaller than the output power of the range-extending module 120, at this time, the rotation speed of the engine 121 is kept unchanged, and the recovery control unit 154 controls the battery module 140 to recover the output electric energy of the range-extending module 120. The recovered electric energy is the difference between the output electric energy of the range extending module 120 and the electric energy consumed by the load.
According to any of the above embodiments, the towing module 130 is electrically connected to the battery module 140;
the controller 150 includes a charging control unit 155 for controlling the charging of the battery module 140 by the mop module 130 if the power of the battery module 140 is less than a predetermined value when the connection state between the mop module 130 and the external power source is "on".
Specifically, when the towing module 130 is in operation, the power obtained from the external power source may be provided not only to the motor 110 but also to the battery module 140 for charging.
Fig. 6 is a third schematic structural diagram of the power system according to the present invention, as shown in fig. 6, the towing module 130 is electrically connected to the battery module 140, wherein the dotted line represents a signal control connection, and the solid line represents an electric power transmission connection. Fig. 7 is a third structural schematic diagram of the controller according to the present invention, and as shown in fig. 7, the controller 150 includes a charging control unit 155, which is used for operating the range extending module 120 when the connection state between the mop module 130 and the external power supply is a connection state. The consumed power of the power system 100 is entirely from an external power source. If the amount of power of the battery module 140 is less than the predetermined value, the charging control unit 155 controls the mop module 130 to charge the battery module 140.
The setting value may be set according to a low battery alarm value of the battery module 140. For example, when the charge of the battery module 140 is lower than the low charge alarm value, the battery module 140 may be charged through the towing module 130.
According to any of the above embodiments, the towing module 130 is provided with a movable socket for detachable connection with an external power source.
Specifically, when the power system 100 provides electric energy, the power system may be in a moving state or a fixed state. For example, the power system 100 may be provided on an electric crane that can lift a weight in a fixed position, or can move a weight within a small range.
At this point, power system 100 may remain flexibly connected to an external power source. For example, by providing a movable socket on the towing module 130, which is flexibly connected to a transformer in the power grid via a cable, the power system 100 can be kept connected to the power grid at all times within the length of the cable and obtain power from the power grid when moving. When the working area of the power system 100 exceeds the length range of the cable, the towing module 130 can be detached from the cable connection and disconnected from the power grid. At this point, the power system 100 is powered by the range extension module 120 and the battery module 140.
Based on any one of the above embodiments, the invention further provides a crane, which comprises the power system.
Specifically, the crane provided by the invention comprises at least one set of power system. The type of crane is not limited to a car crane, a crawler crane, etc.
The crawler crane is a mobile crane which is provided with a hoisting operation part on a crawler chassis and runs by a crawler device. The steel wire ropes matched with the crawler crane comprise phosphated coating steel wire ropes, galvanized steel wire ropes and smooth surface steel wire ropes. The crawler crane consists of a movable arm, a rotary table and other metal structures, a lifting mechanism, a rotating mechanism, an amplitude-changing mechanism, an operating mechanism and the like. The lifting and amplitude-changing mechanism adopts a winding drum to wind a steel rope, and the object taking device is lifted and the movable arm is subjected to pitching amplitude-changing through a complex pulley block. The rotating mechanism adopts a rotating disc type supporting device.
The automobile crane integrates a driving cab and a hoisting control cab, is formed by evolving a crawler crane, changes a crawler and a walking bracket part of a walking mechanism into a chassis with tires, overcomes the defect that a crawler plate of the crawler crane damages a road surface, and belongs to material handling machinery.
Based on any of the above embodiments, fig. 8 is a schematic structural diagram of the towing-power-added range-extended crawler crane provided by the present invention, as shown in fig. 8, in a scene where power cannot be taken due to severe conditions: when the required power of the crane is large, the battery and the generator are connected in parallel to output power; when the power demand of the crane is small, the redundant output electric quantity generated by the generator charges the lithium battery. In the overall operation process of the crane, the output energy of the lithium battery when the required power of the crane is large is ensured to be equal to the input energy when the required power of the crane is small. Under the scene of convenient electricity taking: the crawler crane adopts a towing operation mode, at the moment, the engine and the generator do not work, and the electric quantity from the power grid is rectified by the rectifier-exchanger and then directly acts on the motor. Fig. 9 is a schematic diagram of energy transmission of the towing electric and extended-range crawler crane according to the present invention, as shown in fig. 9, the towing electric and extended-range crawler crane converts electric energy into mechanical energy for acting externally. In the figure, the dashed line represents electrical energy and the solid line represents mechanical energy. The output of the power battery is high-voltage direct current, the generator converts mechanical energy generated by rotation of the engine into electric energy, and the electric energy is transmitted to the high-voltage power distribution unit after passing through the rectifier. The high-voltage distribution unit is used for converting high-voltage direct current electricity and/or electricity generated by the generator into 380V alternating current required by the motor. The motor drives the hydraulic pump under the control of the motor controller to drive each execution structure to do work outwards.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes commands for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A power system is characterized by comprising an electric motor, a range extending module, a towing module, a battery module and a controller;
the range extending module comprises an engine and a generator which are mechanically connected, and the engine is used for driving the generator to generate electric energy;
the mopping module is used for being connected with an external power supply and obtaining electric energy from the external power supply;
the controller is electrically connected with the range extending module, the towing module and the battery module respectively, and is used for acquiring a real-time load of a load connected with the motor and controlling at least one of the range extending module, the towing module and the battery module to provide electric energy for the motor based on the real-time load.
2. The power system of claim 1, wherein the controller includes a load acquisition unit, a status acquisition unit, and a power supply control unit;
the load acquisition unit is used for acquiring a real-time load of a load connected with the motor;
the state acquisition unit is used for acquiring the connection state between the mop module and an external power supply;
the power supply control unit is electrically connected with the load acquisition unit and the state acquisition unit respectively, and is used for controlling at least one of the range extending module, the towing module and the battery module to provide electric energy for the motor based on the real-time load and the connection state between the towing module and an external power supply.
3. The power system of claim 2, wherein the power supply control unit is specifically configured to:
and when the connection state between the mopping module and the external power supply is connection, controlling the mopping module to provide electric energy for the motor.
4. The power system of claim 2, wherein the power supply control unit is specifically configured to:
when the connection state between the mopping module and an external power supply is not connected, if the real-time load is smaller than a first set load value, controlling the battery module to provide electric energy for the motor;
the first set load value is determined based on a remaining capacity of the battery module.
5. The power system of claim 4, wherein the power supply control unit is specifically configured to:
when the connection state of the towing module is not connected with an external power supply, if the real-time load is greater than or equal to a first set load value and less than or equal to a second set load value, controlling the range extending module to provide electric energy for the motor;
the second set load value is determined based on a power rating of the range module.
6. The power system of claim 5, wherein the power supply control unit is specifically configured to:
when the connection state of the towing module is not connected with an external power supply, if the real-time load is greater than a second set load value, the range extending module and the battery module are controlled to provide electric energy for the motor.
7. The power system of any of claims 1-6, wherein the battery module is electrically connected with the range module;
the controller comprises a recovery control unit, and the recovery control unit is used for controlling the battery module to recover the output electric energy of the range-extended module if the real-time load is smaller than the output power of the range-extended module when the range-extended module provides the electric energy for the motor.
8. The power system of any one of claims 1 to 6, wherein the traction module is electrically connected with the battery module;
the controller comprises a charging control unit, and is used for controlling the mop module to charge the battery module if the electric quantity of the battery module is smaller than a set value when the mop module is connected with an external power supply.
9. The power system of any one of claims 1 to 6, wherein the towing module is provided with a removable socket for removable connection with the external power source.
10. A crane comprising a power system according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343313.7A CN112874325A (en) | 2021-03-30 | 2021-03-30 | Power system and crane |
| PCT/CN2021/107087 WO2022205684A1 (en) | 2021-03-30 | 2021-07-19 | Power system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343313.7A CN112874325A (en) | 2021-03-30 | 2021-03-30 | Power system and crane |
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| CN112874325A true CN112874325A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110343313.7A Pending CN112874325A (en) | 2021-03-30 | 2021-03-30 | Power system and crane |
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| Country | Link |
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| CN (1) | CN112874325A (en) |
| WO (1) | WO2022205684A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205684A1 (en) * | 2021-03-30 | 2022-10-06 | 浙江三一装备有限公司 | Power system and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3714914B2 (en) * | 2002-02-22 | 2005-11-09 | Ｔｃｍ株式会社 | A traveling vehicle having a cargo handling function |
| CN110509784A (en) * | 2019-08-21 | 2019-11-29 | 三一汽车制造有限公司 | Automotive power |
| CN211543272U (en) * | 2019-12-23 | 2020-09-22 | 山东田中机械设备有限公司 | Range-extending multifunctional electric service vehicle with alternating current provided by inverter |
| CN211731062U (en) * | 2019-12-31 | 2020-10-23 | 三一汽车制造有限公司 | Vehicle power system and vehicle |
| CN112874325A (en) * | 2021-03-30 | 2021-06-01 | 浙江三一装备有限公司 | Power system and crane |
-
2021
- 2021-03-30 CN CN202110343313.7A patent/CN112874325A/en active Pending
- 2021-07-19 WO PCT/CN2021/107087 patent/WO2022205684A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022205684A1 (en) * | 2021-03-30 | 2022-10-06 | 浙江三一装备有限公司 | Power system and crane |
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| WO2022205684A1 (en) | 2022-10-06 |
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