Hybrid power full hydraulic loading machine hydraulic system based on pressure common rail system

A common rail system, hybrid technology, applied in the direction of earth mover/shovel, construction, etc., can solve the problems of insignificant energy saving effect, low energy recovery rate of oil-electric hybrid system, etc., to improve fuel economy, Simple structure and low emission effect

Inactive Publication Date: 2013-06-19
TIANJIN ENG MACHINERY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a hydraulic system for a hybrid fully hydraulic loader based on a pressure common rail syst

Method used

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  • Hybrid power full hydraulic loading machine hydraulic system based on pressure common rail system

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Example Embodiment

[0038] Attached figure 1 To illustrate the second specific embodiment of the present invention, the traveling hydraulic mechanism 9 includes a traveling hydraulic pump or a hydraulic motor; the traveling hydraulic mechanism control assembly 7 is mechanically connected to the traveling hydraulic mechanism 9, and the hydraulic transformer control assembly is mechanically connected to the hydraulic transformer; The hydraulic transformer includes a first hydraulic transformer 16, a second hydraulic transformer 30, and a third hydraulic transformer 32; the first hydraulic transformer 16 is connected to a boom tank, the second hydraulic transformer 30 is connected to a bucket tank, and the third The hydraulic transformer 32 is connected to the steering oil tank. The other components and connection relationships are the same as in the first embodiment. The boom tank includes a first boom tank 15 and a second boom tank 28; the rotating bucket tank includes a first rotating bucket tank...

Example Embodiment

[0039] Attached figure 1 To illustrate the third specific embodiment of the present invention, the oil inlet port of the constant pressure variable pump 24 is connected to the oil tank 23 via the second filter 21; the oil inlet port of the quantitative pump 2 is connected to the oil tank 23 via the first filter 22; the second one-way The oil outlet port of the valve 27 is connected to the oil tank 23 through the fifth filter 18, and the oil inlet port of the third one-way valve 25 is connected to the oil tank 23 through the sixth filter 26. The other components and connection relationships are the same as in the first embodiment.

[0040] Attached figure 1 To illustrate the fourth specific embodiment of the present invention, the control input end of the constant pressure variable pump 24 is connected to the first control output end of the central controller 17, and the control input end of the electromagnetic directional valve 6 is connected to the second control output end of ...

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Abstract

The invention provides a hybrid power full hydraulic loading machine hydraulic system based on a pressure common rail system. The system is used for solving the problems that an existing hybrid power system is low in transmission efficiency, low in energy recycling rate and low in reusing rate. In the process of braking, a walking hydraulic pump or a motor works in a pump operating condition, braking kinetic energy of a loading machine is recycled and stored in a high-pressure hydraulic accumulator. In a working condition of descending of a movable arm cylinder, the pressure is changed through a hydraulic transformer, and hydraulic energy is stored in the high-pressure hydraulic accumulator. In the process of starting of a vehicle and lifting of the movable arm cylinder, the recycled hydraulic energy can supply power for the vehicle. An active stamping function of the hydraulic pump plays the role of adjusting operating conditions of an engine so that the engine works in the optimum economic zone, and meanwhile the defect that the high-pressure hydraulic accumulator is small in energy density is recovered. The hybrid power full hydraulic loading machine hydraulic system has the advantages of being low in complexity, good in sealing performance, compact in structure, light, low in manufacturing cost and not prone to be polluted.

Description

technical field [0001] The invention relates to a power system of a loader, in particular to a hydraulic system of a hybrid fully hydraulic loader based on a pressure common rail system. Background technique [0002] The loader needs to drive and perform loading operations. Part of the power of the engine drives the traveling mechanism through the hydraulic torque converter and gearbox, and the other part drives the hydraulic cylinder through the hydraulic pump to realize steering and loading. There are frequent start-stop and reciprocating movements during the operation of the loader. Due to the heavy weight of the whole machine, a large amount of energy will be released when decelerating and braking. This part of energy is usually consumed on the valve port of the hydraulic valve, which not only wastes energy, but also It will cause heat generation in the system and a reduction in component life. The transmission efficiency of the hydraulic transmission is low, especially...

Claims

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Application Information

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IPC IPC(8): E02F9/20E02F9/22
Inventor 于安才
Owner TIANJIN ENG MACHINERY INST
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