CN106320418A - Fuel cell drive system of minitype excavator - Google Patents

Abstract

The invention provides a fuel cell drive system for a miniature excavator, which includes a fuel cell and its control module, a motor drive control module, a left crawler belt drive module for a miniature excavator, a right crawler belt drive module for a miniature excavator, and a rotary mechanism drive unit for a miniature excavator. Module, miniature excavator working device drive module; the fuel cell and its control module are connected with the motor drive control module, and the motor drive control module is connected with the left crawler drive module of the miniature excavator, the right crawler drive module of the miniature excavator, the miniature excavator The driving module of the slewing mechanism of the excavator and the driving module of the working device of the miniature excavator are respectively connected. The invention can effectively solve the problems of low energy consumption efficiency and high pollution discharge of the micro excavator.

Description

A fuel cell drive system for a miniature excavator

technical field

The invention relates to the field of new energy driving of small construction machinery, in particular to a fuel cell driving system of a miniature excavator.

Background technique

Excavator is a widely used earthwork construction machine, which is widely used in road engineering, mine excavation, water conservancy construction and farmland development. The quality aspect plays a huge role.

Excavators can be divided into extra-large, large, medium, small and micro models according to their deadweight tonnage. The self-weight of mini excavators is generally less than 4 tons, and they are widely used in the construction of small earthworks in municipal and farmland water conservancy. The excavator adopts a diesel engine-hydraulic system-multi-actuator drive structure, which has low energy efficiency and high pollution emissions. Compared with medium and large excavators, the power of the mini excavator is smaller, the load fluctuation range is not large, and it is easier to use the fuel cell drive system. Therefore, the fuel cell drive system has important engineering significance for improving energy consumption efficiency and reducing pollution emissions of mini excavators.

Contents of the invention

The invention provides a fuel cell drive system for a miniature excavator, which can effectively solve the problems of low energy consumption efficiency and high pollution discharge of the miniature excavator.

The invention provides a fuel cell drive system for a miniature excavator, which includes a fuel cell and its control module, a motor drive control module, a left crawler belt drive module for a miniature excavator, a right crawler belt drive module for a miniature excavator, and a rotary mechanism drive unit for a miniature excavator. Module, miniature excavator working device drive module, the fuel cell and its control module are connected with the motor drive control module, the motor drive control module is connected with the left crawler drive module of the miniature excavator, the right crawler drive module of the miniature excavator, the miniature excavator The driving module of the slewing mechanism of the excavator and the driving module of the working device of the miniature excavator are respectively connected;

The fuel cell and its control module include a hybrid controller, a fuel cell pack, a DC-DC unit, a lithium battery pack, and an electrical coupling device, and the hybrid controller is connected to the input end of the fuel cell pack and the input terminal of the lithium battery pack respectively. The output end of the lithium battery pack is connected to the output end of the DC-DC unit, and the output end of the DC-DC unit and the output end of the lithium battery pack are respectively connected to the input end of the electric coupling device;

The input end of the drive motor controller module is connected with the output end of the electric coupling device;

The left track drive module of the mini excavator includes a left track drive motor, a left track wheel side reducer, and a left track drive wheel. The left track drive motor, left track wheel side reducer, and left track drive wheel are connected in sequence. The output end of the motor controller module is connected with the left crawler drive motor;

The right track drive module of the mini excavator includes a right track drive motor, a right track wheel side reducer, and a right track drive wheel. The right track drive motor, the right track wheel side reducer, and the right track drive wheel are connected in sequence. The output terminal of the motor controller module is connected with the right crawler drive motor;

The mini-excavator slewing mechanism driving module includes a slewing mechanism driving motor, a slewing reducer, and a part of the slewing mechanism on board, and the slewing mechanism drive motor, slewing reducer, and the slewing mechanism on the car are connected in sequence, and the drive motor controller module The output end of the rotary mechanism is connected with the driving motor;

The driving module of the mini excavator working device includes a hydraulic system drive motor, a final reducer, a hydraulic pump group, an electro-hydraulic proportional reversing valve group, a hydraulic cylinder group, and an excavator working device. The hydraulic system drives the motor, the final reducer, The hydraulic pump group, the electro-hydraulic proportional reversing valve group, the hydraulic cylinder group, and the working device of the excavator are connected in sequence, and the output end of the drive motor controller module is connected with the drive motor of the hydraulic system.

The present invention effectively applies the fuel cell technology to the driving system of the miniature excavator, and has the following advantages compared with the driving technology of the existing miniature excavator:

1) The invention adopts the fuel cell technology, so that the mini excavator will not produce any pollution during the construction process;

2) The present invention uses a structure of a motor plus a wheel-side reducer to drive the left and right crawler belts of the mini excavator, and uses a structure of a motor plus a slewing reducer to drive the upper part of the slewing mechanism, which greatly reduces the layout of hydraulic pipelines and the use of hydraulic components. The overall efficiency of the mini excavator is improved.

Description of drawings

Fig. 1 is a functional block diagram of the present invention.

detailed description

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Referring to FIG. 1 , a fuel cell drive system for a miniature excavator includes a fuel cell and its control module 100, a motor drive control module 200, a left crawler drive module 310 for a miniature excavator, a right crawler drive module 320 for a miniature excavator, and a miniature excavator machine slewing mechanism drive module 330, mini excavator working device drive module 340, the fuel cell and its control module 300 are connected with the motor drive control module 200, and the motor drive control module 200 is connected with the left track drive module 310 of the mini excavator , the right track drive module 320 of the miniature excavator, the driving module 330 of the slewing mechanism of the miniature excavator, and the driving module 340 of the working device of the miniature excavator are respectively connected;

The fuel cell and its control module 100 include a hybrid controller 101, a fuel cell pack 102, a DC-DC unit 103, a lithium battery pack 104, and an electrical coupling device 105. The hybrid controller 101 is connected to the fuel cell pack 102 respectively. The input end is connected with the input end of lithium battery pack 104, and the output end of this lithium battery pack 104 is connected with the output end of DC-DC unit 103, and the output end of this DC-DC unit 103 is connected with the output end of lithium battery pack 104 respectively. Be connected with the input end of electrical coupling device 105;

The input end of the drive motor controller module 200 is connected to the output end of the electrical coupling device 105;

The left track drive module 310 of the mini excavator includes a left track drive motor 311, a left track wheel side reducer 312, and a left track drive wheel 313. The left track drive motor 311, the left track wheel side reducer 312, and the left track drive wheel 313 are connected successively, and the output terminal of described driving motor controller module 200 is connected with left crawler belt driving motor 311;

The right track drive module 320 of the mini excavator includes a right track drive motor 321, a right track wheel side reducer 322, and a right track drive wheel 323. 323 are connected successively, and the output terminal of described driving motor controller module 200 is connected with right crawler belt driving motor 321;

The mini-excavator slewing mechanism driving module 330 includes a slewing mechanism driving motor 331, a slewing reducer 332, and a turning mechanism 333 for the boarding part. The output terminal of the drive motor controller module 200 is connected with the drive motor 331 of the slewing mechanism;

The driving module 340 of the miniature excavator working device includes a hydraulic system drive motor 341, a final reducer 342, a hydraulic pump group 343, an electro-hydraulic proportional reversing valve group 344, a hydraulic cylinder group 345, and an excavator working device 346. The driving motor 341, the final reducer 342, the hydraulic pump group 343, the electro-hydraulic proportional reversing valve group 344, the hydraulic cylinder group 345, and the excavator working device 346 are connected in sequence, and the output end of the driving motor controller module 200 is connected to the hydraulic system The drive motor 341 is connected.

Claims (1)

1. A fuel cell drive system for a miniature excavator, comprising a fuel cell and its control module (100), a motor drive control module (200), a left track drive module for a miniature excavator (310), and a right track drive module for a miniature excavator (320), mini excavator slewing mechanism drive module (330), mini excavator working device drive module (340), the fuel cell and its control module (300) are connected with the motor drive control module (200), the The motor drive control module (200), the left track drive module (310) of the mini excavator, the right track drive module (320) of the mini excavator, the drive module of the slewing mechanism of the mini excavator (330), the drive module of the working device of the mini excavator (340 ) are connected respectively; The fuel cell and its control module (100) include a hybrid power controller (101), a fuel cell pack (102), a DC-DC unit (103), a lithium battery pack (104), and an electrical coupling device (105). The hybrid power controller (101) is respectively connected with the input end of the fuel cell group (102) and the input end of the lithium battery group (104), and the output terminal of the lithium battery group (104) is connected with the output of the DC-DC unit (103) The output end of the DC-DC unit (103) is connected to the output end of the lithium battery pack (104) and the input end of the electric coupling device (105) respectively; The input end of the drive motor controller module (200) is connected with the output end of the electric coupling device (105); The left crawler drive module (310) of the mini excavator includes a left crawler drive motor (311), a left crawler wheel side reducer (312), a left crawler drive wheel (313), the left crawler drive motor (311), the left crawler The wheel side reducer (312) and the left crawler drive wheel (313) are connected in sequence, and the output end of the drive motor controller module (200) is connected with the left crawler drive motor (311); The right track drive module (320) of the mini excavator includes a right track drive motor (321), a right track wheel side reducer (322), a right track drive wheel (323), the right track drive motor (321), the right track drive The wheel side reducer (322) and the right crawler drive wheel (323) are connected in sequence, and the output end of the drive motor controller module (200) is connected with the right crawler drive motor (321); The mini-excavator slewing mechanism driving module (330) includes a slewing mechanism driving motor (331), a slewing speed reducer (332), a car-mounted part slewing mechanism (333), the slewing mechanism driving motor (331), a slewing speed reducer ( 332), the turning mechanism (333) of the boarding part is connected in sequence, and the output end of the drive motor controller module (200) is connected with the turning mechanism driving motor (331); The driving module (340) of the working device of the miniature excavator includes a hydraulic system drive motor (341), a final reducer (342), a hydraulic pump group (343), an electro-hydraulic proportional reversing valve group (344), a hydraulic cylinder group ( 345), excavator working device (346), the hydraulic system drive motor (341), final reducer (342), hydraulic pump group (343), electro-hydraulic proportional reversing valve group (344), hydraulic cylinder group (345 ), the excavator working device (346) is connected in turn, and the output end of the drive motor controller module (200) is connected with the hydraulic system drive motor (341).