CN112919316A - Crane range-extending power system and driving method thereof and crane - Google Patents
Crane range-extending power system and driving method thereof and crane Download PDFInfo
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- CN112919316A CN112919316A CN202110065588.9A CN202110065588A CN112919316A CN 112919316 A CN112919316 A CN 112919316A CN 202110065588 A CN202110065588 A CN 202110065588A CN 112919316 A CN112919316 A CN 112919316A
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- crane
- generator
- motor
- transmission shaft
- engine
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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
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention provides a crane range-extending power system, a driving method thereof and a crane, and relates to the technical field of engineering machinery driving, wherein the crane range-extending power system comprises a chassis engine, a generator, a motor and a conducting ring; the power output end of the chassis engine is connected with the input end of the generator; the output end of the generator is connected with the input end of the conducting ring; the input end of the conducting ring is also suitable for being connected with an external power supply, and the output end of the conducting ring is connected with the motor; the engine drives the generator to generate electricity and inputs electric energy for the motor through the conducting ring, and/or the conducting ring inputs electric energy for the engine through connecting an external power supply; the electric motor is adapted to convert electric energy into kinetic energy for driving the crane's implement system. The invention integrates the advantages of the engine and the power source of the motor, the chassis engine can drive the automobile to walk and provide kinetic energy for the generator, so that the automobile crane can walk and transition in a long distance, thereby improving the energy utilization rate, reducing the exhaust emission and having remarkable energy-saving and emission-reducing effects.
Description
Technical Field
The invention relates to the technical field of engineering machinery driving, in particular to a crane stroke-increasing power system, a driving method thereof and a crane.
Background
At present, a large-tonnage automobile crane mostly adopts a double-engine configuration, namely a chassis engine is arranged on a chassis, and a boarding engine is arranged on a table board. The chassis engine is used as a power device for the crane to walk, and the power of the chassis engine is greater than that of the upper vehicle engine; the engine of getting on the bus is used as the power device of the hoisting equipment, drives the hydraulic system to drive the actuating mechanism such as the davit to finish the hoisting operation.
Most of the existing chassis engines and the existing upper vehicle engines are internal combustion engines, and the internal combustion engines are used as power sources of engineering machinery and are mature. However, the exhaust emissions and operating noise of internal combustion engines have a serious impact on the environment. Along with the gradual improvement of national environmental protection regulations, the requirements on the emission of engineering machinery are higher and higher, and the inspection on the emission pollutants of non-road mobile machinery is stricter. The pollution of noise, tail gas and the like generated by the automobile crane during municipal construction operation is difficult to meet the current requirement on the environment. Meanwhile, the boarding engine and the accessory system thereof are arranged at the periphery of the control cabin, so that the noise is high during hoisting operation, and the discomfort of an operator can be caused after long-time work.
At present, in order to avoid the problems of manufacturing and using cost rise and space arrangement caused by emission upgrade of an engine on the vehicle, automobile crane manufacturers in the industry mostly adopt a mechanical or hydraulic single-engine power scheme to provide power for the vehicle on the vehicle. The crane only using electric power as a power source can not travel and transition at a long distance, a special transport vehicle needs to be configured, the battery endurance is weak, the occupied space is large, and the arrangement is difficult, so that the site adaptability of the pure electric crane is insufficient.
Disclosure of Invention
The invention solves the problems that the existing crane adopts an internal combustion engine to drive the crane to walk and lift at the same time, and has larger pollution and noise; the crane only using electric power as a power source can not travel and transition at a long distance, a special transport vehicle needs to be configured, the battery endurance is weak, the occupied space is large, and the arrangement is difficult, so that the site adaptability of the pure electric crane is insufficient.
In order to solve the above problems, the invention provides a crane range-extending power system, which comprises a chassis engine, a generator, a motor and a conducting ring;
the power output end of the chassis engine is connected with the input end of the generator;
the output end of the generator is connected with the input end of the conducting ring;
the input end of the conducting ring is also suitable for being connected with an external power supply, and the output end of the conducting ring is connected with the motor;
the engine drives the generator to generate power and inputs electric energy for the motor through the conducting ring, and/or the conducting ring inputs electric energy for the engine through connecting the external power supply;
the electric motor is adapted to convert electrical energy into kinetic energy to drive an implement system of the crane.
The crane stroke-increasing power system enables the crane to become a hybrid power automobile crane, and the power system has two working modes, wherein one mode is used for providing stroke-increasing electric power for a chassis engine, the other mode is used for being driven by an external power grid power supply, and the crane can selectively use the engine or the external power supply to provide power when in work. When large-scale movement or field construction and the like are needed and an external power supply cannot be connected, the chassis engine is used as a power source, the chassis engine outputs power and drives the generator to generate power, and then the power is supplied to the motor to drive the execution system to execute operations such as hoisting and the like. When the electric power system is constructed in the urban area or can be stably connected with an external power supply such as a port wharf and the like, the power source can be switched, the external power supply is used as the power source to supply power for the motor, and the motor drives the execution system to execute the operations such as hoisting and the like. The invention organically integrates the advantages of the engine and the motor power source, the chassis engine can drive the crane to walk and provide kinetic energy for the generator, so that the crane can walk and transition in a long distance and can realize low-noise and low-emission construction, thereby improving the energy utilization rate, reducing the exhaust emission, having remarkable energy-saving and emission-reducing effects and being suitable for various occasions, particularly municipal construction. Meanwhile, the engine of the upper crane in the existing crane is replaced by the motor, the engine of the chassis is reserved and is used as an energy supply device for the traveling, hoisting and other operations of the crane, the structure is not greatly changed while the beneficial effects are brought, the structural complexity of the crane is not increased due to the updating of the functions, and the crane has great advantages in the field of cranes.
Furthermore, the power system further comprises a speed change mechanism and a transmission shaft, the power output end of the chassis engine is connected with the input end of the generator through the transmission shaft, and the speed change mechanism is arranged between the chassis engine and the transmission shaft.
Furthermore, the transmission shaft comprises a first transmission shaft and a second transmission shaft, and the speed change mechanism, the first transmission shaft and the second transmission shaft are sequentially connected with the generator.
Further, the power system further comprises a first transfer mechanism, and the first transfer mechanism is arranged between the first transmission shaft and the second transmission shaft.
Further, the power system further comprises a controller, and the controller is electrically connected with the chassis engine, the generator, the motor, the conducting ring, the speed change mechanism and the first power split mechanism respectively.
Further, the power system further comprises a battery, the battery is electrically connected with the generator, and the battery is electrically connected with the controller.
Furthermore, the power system also comprises a hydraulic pump set and a third transmission shaft, and the output end of the motor is connected with the hydraulic pump set through the third transmission shaft.
Further, the power system also comprises a second transfer mechanism, and the second transfer mechanism is arranged between the third transmission shaft and the hydraulic pump group.
Another objective of the present invention is to provide a driving method for a crane range-extending power system, which includes two driving methods:
the method comprises the following steps that a chassis engine is started in a first driving mode, the chassis engine drives a generator, the generator converts kinetic energy into electric energy and transmits the electric energy to a motor through a conducting ring, and the motor converts the electric energy into the kinetic energy and drives an execution system;
and in the second driving mode, the chassis engine is closed, the conducting ring is connected with an external power supply, the external power supply supplies power to the motor, and the motor converts electric energy into kinetic energy and drives an execution system.
Another object of the present invention is to provide a crane, including any one of the crane stroke-increasing power systems described above.
Compared with the prior art, the beneficial effects of the driving method of the crane range-extending power system and the crane of the invention are the same as the beneficial effects of the crane range-extending power system in the prior art, and are not repeated herein.
Drawings
FIG. 1 is a schematic structural diagram of a crane range-extending power system according to an embodiment of the present invention;
fig. 2 is a connection schematic diagram of a crane range-extending power system according to an embodiment of the invention.
Description of reference numerals:
1-a chassis engine; 2-a generator; 3-an electric motor; 4-conducting ring; 5-a speed change mechanism; 6-a transmission shaft; 61-a first drive shaft; 62-a second drive shaft; 7-a first transfer gear; 8-a hydraulic pump group; 9-a third transmission shaft; 10-a second transfer gear; 11-a controller; 12-a battery; 13-executing the system.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate orientation words, which are used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that elements, devices, and the like which are referred to must operate according to specific orientations and defined operations and methods, configurations in the specification, and such orientation terms do not constitute limitations of the present invention.
In addition, the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of embodiments of the present application, the description of the term "some embodiments" means 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 invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation 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.
The embodiment of the invention provides a crane range extending power system, which is used for providing power for operations such as starter walking and crane hoisting and the like, and is combined with the fig. 1 and 2, and comprises a chassis engine 1, a generator 2, a motor 3 and a conducting ring 4; the power output end of the chassis engine 1 is connected with the input end of the generator 2; the output end of the generator 2 is connected with the input end of the conducting ring 4; the input end of the conducting ring 4 is also suitable for being connected with an external power supply, and the output end of the conducting ring 4 is connected with the motor 3; the engine 1 drives the generator 2 to generate power and inputs electric energy for the motor 3 through the conducting ring 4, and/or the conducting ring 4 inputs electric energy for the motor 3 through connecting with the external power supply; the electric motor 3 converts electric energy into kinetic energy and is adapted to drive an actuator system 13 of the crane.
The crane is a wheel-type walking crane and comprises a crane body and a power system, wherein the crane body comprises a chassis and a hoisting device arranged on the chassis. The power system is an extended-range power system, comprises a chassis engine 1 originally arranged on the crane, and replaces an engine on the crane with a motor 3, so that the power system can work in two modes:
in the first working mode, an external power supply supplies power to the motor 3, and the motor 3 drives an execution system of the crane to perform hoisting operation;
in the second working mode, the chassis engine 1 drives the generator 2 to convert kinetic energy into electric energy to supply power to the motor 3, and the motor 3 drives the execution system 13 of the crane to perform hoisting operation.
The crane extended-range power system described in this embodiment makes the crane become a hybrid crane. Because the power system has two working modes, one mode is used for providing range-extended electric power for the chassis engine, the other mode is used for being driven by an external power grid power supply, and the crane can selectively use the engine or the external power supply to provide power when in work. When large-scale movement or field construction and the like are needed and an external power supply cannot be connected, the chassis engine is used as a power source, the chassis engine outputs power and drives the generator to generate power, and then the power is supplied to the motor to drive the execution system to execute operations such as hoisting and the like. When the electric power system is constructed in the urban area or can be stably connected with an external power supply such as a port wharf and the like, the power source can be switched, the external power supply is used as the power source to supply power for the motor, and the motor drives the execution system to execute the operations such as hoisting and the like. The chassis engine can drive the crane to travel and provide kinetic energy for the generator, so that the crane can travel and transition in a long distance and can realize low-noise and low-emission construction, the energy utilization rate is improved, the exhaust emission is reduced, the chassis engine has remarkable energy-saving and emission-reducing effects, and the chassis engine can be suitable for various occasions, particularly municipal construction.
The crane range-extending power system is simple in structure and small in occupied space, can be implemented on the existing single-engine vehicle type, and achieves getting-on electromotion; the chassis engine has two purposes, and can be used for running and providing power for getting on the vehicle; the noise of the boarding operation is low, and the emission level is low; the problem of travel mileage can be solved, and the self-charging can be realized.
Specifically, the conductive ring described in this embodiment belongs to an electrical contact sliding connection component, and is a precision transmission device capable of realizing image, data signal and power transmission of two relative rotation mechanisms, which is also called a conductive slip ring.
Specifically, the power system further comprises a speed change mechanism 5 and a transmission shaft 6, a power output end of the chassis engine 1 is connected with an input end of the generator 2 through the transmission shaft 6, and the speed change mechanism 5 is arranged between the chassis engine 1 and the transmission shaft 6. The transmission shaft 6 comprises a first transmission shaft 61 and a second transmission shaft 62, and the speed change mechanism 5, the first transmission shaft 61, the second transmission shaft 62 and the generator 2 are sequentially connected. The power system further comprises a first transmission mechanism 7, and the first transmission mechanism 7 is arranged between the first transmission shaft 61 and the second transmission shaft 62.
The chassis engine 1, the speed change mechanism 5, the first transmission shaft 61, the first power split mechanism 7, the second transmission shaft 62 and the generator 2 form a series hybrid system. The chassis engine 1 is used for providing kinetic energy input; the speed change mechanism 5 is used for adjusting the rotation ratio of the chassis engine 1 and the first transmission shaft 61; the first power distribution mechanism 7 is used for distributing the output power of the chassis engine 1 and controlling the output power of the chassis engine 1 to drive a crane to walk or drive the generator 2 to generate power; the first transmission shaft 61 and the second transmission shaft 62 serve as transmission mechanisms for transmitting the power output by the chassis engine 1 to the generator 2.
Specifically, the transmission shaft realizes the change of the rotation angle through a universal joint, and the speed change mechanism 5 is composed of a gearbox and a power takeoff.
It should be noted that, the embodiment provides a better transmission mode for the power system, and it is not limited that the power transmission between the chassis engine and the generator is realized only by the above transmission mode, and all that is a transmission mechanism capable of realizing the concept of the present invention, the chassis engine is regulated and controlled to drive the starter to travel (to drive the wheel shaft of the crane to rotate) when the crane is required to travel, and the chassis engine is controlled to provide kinetic energy for the generator when the crane is required to perform lifting operation, falls into the protection range of the power system described in the present invention.
Specifically, the power system further comprises a battery 12, wherein the battery 12 is electrically connected with the generator 2 and is used for storing electric energy converted by the generator 2, providing stable power input for the motor 3 and storing redundant electric quantity of the generator 2 when necessary. Preferably, the battery 12 can also provide energy input when the motor 3 is started, when the hoisting mechanism is hoisted for a short time or a short distance, the battery 12 can be independently used for providing electric energy for the motor 3, an external power supply and the chassis engine 1 are not required to be involved, and the crane has stronger operation flexibility.
It should be noted that the battery 12 of the present embodiment includes a single battery and a battery pack, and any battery device having a storage capacity and adapted to supply power to the motor 3 falls within the protection scope defined by the present invention for the battery.
Specifically, as shown in fig. 1, the power system further includes a hydraulic pump unit 8 and a third transmission shaft 9, and the output end of the electric motor 3 is connected to the hydraulic pump unit 8 through the third transmission shaft 9. Preferably, the hydraulic pump unit 8 includes a main pump, a rotary pump, an auxiliary pump, and the like, and selects a corresponding pump to operate according to different execution actions of the execution system 13.
The power system further comprises a second transfer mechanism 10, the second transfer mechanism 10 is arranged between the third transmission shaft 9 and the hydraulic pump set 8, and the second transfer mechanism 10 is used for adjusting the conversion of the amplitude variation, lifting, rotation, stretching and the like of the hydraulic pump set 8 to the driving of an execution system 13. Specifically, the second transfer mechanism 10 is connected with the hydraulic pump set, and power distribution is carried out through the second transfer mechanism; the power takeoff and the hydraulic pump set 8 can be connected in series for transmission, so that the power transmission of the motor output shaft to the hydraulic pump set 8 is realized.
Specifically, as shown in conjunction with fig. 2, the solid line in fig. 2 represents the transmission of mechanical power, and the broken line represents the transmission of a control signal. The power system further comprises a controller 11, and the controller 11 is electrically connected with the chassis engine 1, the generator 2, the motor 3, the conducting ring 4, the speed change mechanism 5, the first transfer mechanism 7 and the battery 12 respectively. The controller is used for controlling the crane range-extending power system to perform power driving on the crane, and specifically, the driving method comprises the following two driving modes:
in the first driving mode, a controller 11 of the power system controls a speed change mechanism 5 to be connected, a chassis engine 1 is started, the chassis engine 1 inputs kinetic energy to a generator 2 through a transmission shaft 6, the generator 2 converts the kinetic energy into electric energy and transmits the electric energy to an electric motor 3 through a conducting ring 4, and the electric motor 3 converts the electric energy into the kinetic energy and drives an execution system 13; preferably, the excess electric quantity of the generator 2 is stored in the battery 12, so that the battery 12 can supply power to the motor 3 for a short time in case of emergency;
in a second driving mode, the controller 11 controls the chassis engine 1 to be closed, the conducting ring 4 is connected with an external power supply, the external power supply supplies power to the motor 3, and the motor 3 converts electric energy into kinetic energy and drives the execution system 13; preferably, when the battery 12 is not fully charged, the external power supply charges the battery 12, so that the battery 12 can supply power to the motor 3 for a short time in an emergency.
On the basis of the above embodiment, another embodiment of the present invention provides a crane, including the stroke-increasing power system described in any of the above embodiments, for providing power for walking and lifting of the crane.
Specifically, the crane includes a traveling system, the extended range power system and the execution system 13 according to any of the above embodiments, the traveling system includes a vehicle chassis, an axle, wheels, and the like, and a chassis engine 1 of the power system is disposed on the chassis and can provide power for the axle, so that the crane can travel for a long distance. The power system can also convert the output power of the chassis engine 1 into electric energy to supply the motor 3 through power conversion, or directly charge the motor 3 through an external power supply, and the motor 3 drives the execution system 13 to perform operations such as rotation, lifting, amplitude variation, stretching, auxiliary and the like. Specifically, the execution system 13 includes a hoisting motor, a rotary speed reducer, a telescopic cylinder, a luffing cylinder, and the like. The crane organically integrates the advantages of the power source of the chassis engine 1 and the power source of the motor 3, so that the crane can travel and transition at a long distance and can realize low-noise and low-emission construction. Thereby improving the energy utilization rate, reducing the exhaust emission and having remarkable energy-saving and emission-reducing effects. It can be suitable for various occasions, especially for municipal construction.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A crane range-extending power system is characterized by comprising a chassis engine (1), a generator (2), a motor (3) and a conducting ring (4);
the power output end of the chassis engine (1) is connected with the input end of the generator (2);
the output end of the generator (2) is connected with the input end of the conducting ring (4);
the input end of the conducting ring (4) is also suitable for being connected with an external power supply, and the output end of the conducting ring (4) is connected with the motor (3);
the engine (1) drives the generator (2) to generate electricity and inputs electric energy for the motor (3) through the conducting ring (4), and/or the conducting ring (4) inputs electric energy for the engine (3) through being connected with the external power supply.
2. The crane range-extending power system according to claim 1, further comprising a speed-changing mechanism (5) and a transmission shaft (6), wherein the power output end of the chassis engine (1) is connected with the input end of the generator (2) through the transmission shaft (6), and the speed-changing mechanism (5) is arranged between the chassis engine (1) and the transmission shaft (6).
3. The crane range-extending power system according to claim 2, wherein the transmission shaft (6) comprises a first transmission shaft (61) and a second transmission shaft (62), and the speed change mechanism (5), the first transmission shaft (61) and the second transmission shaft (62) are connected with the generator (2) in sequence.
4. The crane range extending power system according to claim 3, further comprising a first transfer gear (7), wherein the first transfer gear (7) is arranged between the first transmission shaft (61) and the second transmission shaft (62).
5. The crane range-extending power system according to claim 4, further comprising a controller (11), wherein the controller (11) is electrically connected with the chassis engine (1), the generator (2), the motor (3), the conductive ring (4), the speed change mechanism (5) and the first transfer mechanism (7) respectively.
6. The crane range extending power system according to claim 5, further comprising a battery (12), wherein the battery (12) is electrically connected with the generator (2), and the battery (12) is electrically connected with the controller (11).
7. The crane range-extending power system as claimed in claim 1, characterized in that the power system further comprises a hydraulic pump set (8) and a third transmission shaft (9), and the output end of the motor (3) is connected with the hydraulic pump set (8) through the third transmission shaft (9).
8. The crane range extending power system according to claim 7, further comprising a second transfer gear (10), the second transfer gear (10) being arranged between the third transmission shaft (9) and the hydraulic pump package (8).
9. The driving method of the crane range-extending power system is based on the crane range-extending power system according to any one of claims 1 to 8, and is characterized by comprising two driving modes:
the chassis engine (1) is started in a first driving mode, the chassis engine (1) drives the generator (7), the generator (7) converts kinetic energy into electric energy and transmits the electric energy to the motor (3) through the conducting ring (4), and the motor (3) converts the electric energy into the kinetic energy and drives the execution system (13);
and in a second driving mode, the chassis engine (1) is closed, the conducting ring (4) is connected with an external power supply, the external power supply supplies power to the motor (3), and the motor (3) converts electric energy into kinetic energy and drives the execution system (13).
10. A crane comprising a crane reach-extension power system as claimed in any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110065588.9A CN112919316A (en) | 2021-01-18 | 2021-01-18 | Crane range-extending power system and driving method thereof and crane |
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| CN202110065588.9A CN112919316A (en) | 2021-01-18 | 2021-01-18 | Crane range-extending power system and driving method thereof and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114148168A (en) * | 2021-12-31 | 2022-03-08 | 郑州博歌车辆有限公司 | Power source system device of bridge inspection vehicle |
| CN114988281A (en) * | 2022-07-05 | 2022-09-02 | 徐州重型机械有限公司 | Oil-electricity hybrid operation system of automobile crane and crane |
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| DE102018127125A1 (en) * | 2018-10-30 | 2020-04-30 | Konecranes Global Corp. | Port crane with an improved drive system |
| CN210554230U (en) * | 2019-09-09 | 2020-05-19 | 山东中叉重工机械有限公司 | Hybrid power supply system for engineering machinery |
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| CN102490583A (en) * | 2012-01-05 | 2012-06-13 | 三一汽车起重机械有限公司 | Hybrid power system for hydraulic system and engineering machine |
| DE102018127125A1 (en) * | 2018-10-30 | 2020-04-30 | Konecranes Global Corp. | Port crane with an improved drive system |
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| CN114148168A (en) * | 2021-12-31 | 2022-03-08 | 郑州博歌车辆有限公司 | Power source system device of bridge inspection vehicle |
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Application publication date: 20210608 |