A Flywheel-Based Hybrid Mechanical System for Excavators

A mechanical hybrid and power system technology, applied in earth movers/shovels, construction, etc., can solve problems such as inconvenient installation of accumulators, influence of boom falling speed, pressure rise, etc., and achieve significant energy saving effects and improve Energy utilization efficiency and the effect of avoiding energy waste

Active Publication Date: 2021-08-13
XUZHOU COLLEGE OF INDAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic recovery scheme takes advantage of the accumulator’s high power density and the ability to absorb pressure shocks. However, due to the low density of energy stored in the accumulator, if more energy needs to be stored, a larger accumulator will be required, which in turn will Occupies a large space, and the installation of the accumulator is also very inconvenient
In addition, the pressure of the accumulator will rise with the increase of the stored oil, which will affect the falling speed of the boom

Method used

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  • A Flywheel-Based Hybrid Mechanical System for Excavators
  • A Flywheel-Based Hybrid Mechanical System for Excavators
  • A Flywheel-Based Hybrid Mechanical System for Excavators

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 2 and Figure 4 As shown, a flywheel-based hybrid mechanical system for an excavator includes a prime mover 1, a hydraulic pump 2, a boom hydraulic cylinder 4, a second reversing valve 702, a rotational speed sensor 19, a pressure sensor 17 and a control The prime mover 1 is connected to the hydraulic pump 2 through the transfer case 6 to provide power for the hydraulic pump 2, and the oil suction port S of the hydraulic pump 2 is connected to the fuel tank 5; the prime mover 1 is generally a diesel engine or other engine, and can also be an electric motor, etc. .

[0034] The oil outlet P of the hydraulic pump 2 is respectively connected with the P port of the first reversing valve 701, the P port of the third reversing valve 703 and the P port of the hydraulic pump / motor 10 through the check valve 3; the P port of the hydraulic pump 2 The port is also connected to the P port of the main relief valve 14 through the check valve 3, and the T port of the...

Embodiment 2

[0043] Such as image 3 and Figure 4 As shown, a flywheel-based hybrid mechanical system for an excavator includes a prime mover 1, a hydraulic pump 2, a boom hydraulic cylinder 4, a second reversing valve 702, a rotational speed sensor 19, a pressure sensor 17 and a control The prime mover 1 is connected to the hydraulic pump 2 through the transfer case 6 to provide power for the hydraulic pump 2, and the oil suction port S of the hydraulic pump 2 is connected to the fuel tank 5; the prime mover 1 is generally a diesel engine or other engine, and can also be an electric motor, etc. .

[0044] The oil outlet P of the hydraulic pump 2 is respectively connected with the P port of the first reversing valve 701, the P port of the third reversing valve 703 and the P port of the hydraulic pump / motor 10 through the check valve 3; the P port of the hydraulic pump 2 The port is also connected to the P port of the main relief valve 14 through the check valve 3, and the T port of the ...

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Abstract

A flywheel-based hybrid mechanical hybrid system for excavators. The prime mover is connected to a hydraulic pump and a continuously variable transmission through a transfer case; the oil outlet P of the hydraulic pump is respectively connected to the first reversing valve Port P and port P of the third reversing valve are connected to port P of the hydraulic pump / motor; ports A of the first and third reversing valves are respectively connected to the rodless chamber and the rod chamber of the boom hydraulic cylinder; the third The T port of the reversing valve is connected to the fuel tank; the A port of the hydraulic pump / motor is connected to the fuel tank; the P port and T port of the second reversing valve are respectively connected to the A port of the first reversing valve and the fuel tank; the continuously variable transmission passes through The clutch is connected in series with the hydraulic pump / motor, and the hydraulic pump / motor is connected in series with the flywheel through the clutch; the rotational speed sensor is arranged on the flywheel housing; the pressure sensor is arranged in the rodless chamber of the boom hydraulic cylinder. The system can realize the integrated function of recovering and reusing the gravitational potential energy of the boom, and can improve the energy utilization efficiency of the system.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, and in particular relates to a flywheel-based hybrid mechanical hybrid power system for an excavator. Background technique [0002] Hydraulic excavators are widely used in various construction fields. Hydraulic excavators have disadvantages such as high fuel consumption and low efficiency. Research on energy saving is imminent. [0003] During the working process of the excavator, the lifting and lowering movements of the boom are frequent, and due to the large mass of the working device and the load, a large amount of potential energy will be released during the descent. Most of this energy is consumed in the throttle port of the main hydraulic valve and converted into heat energy, which causes waste of energy and heating of the system, and at the same time, reduces the life of hydraulic components. In the field of transmission technology, hybrid technology has become one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22
CPCE02F9/2264E02F9/2267
Inventor 李建松孙金海周波黎少辉张文婷
Owner XUZHOU COLLEGE OF INDAL TECH
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