Energy-saving system of excavator

Abstract

The invention discloses an energy-saving system of an excavator. The energy-saving system is mainly composed of an engine direct-driven fan transmission loop, an energy accumulator control fan motor loop and an energy accumulator control drive motor loop. The energy-saving system comprises an oil tank, a variable hydraulic pump, a first variable hydraulic motor, a quantitative hydraulic pump, an engine, a transfer case, a fan, a second variable motor, a first switching valve, a first direction valve, a second direction valve, a second switching valve, a third direction valve, a pressure valve and an energy accumulator. The engine direct-driven fan transmission loop is composed of the engine, the transfer case, the fan and the first direction valve. According to the energy-saving system, recycled energy stored in the energy accumulator is used for directly driving the heat dissipation hydraulic motor, no other links are adopted in the process, and the transmission efficiency is high. Meanwhile, no coupling happens to a working oil cylinder and the motor, the operation performance of the whole machine is not affected, and utilization of the recycled energy is improved.

Description

technical field [0001] The invention relates to an energy-saving control system, in particular to an excavator energy-saving system, which belongs to the technical field of energy-saving control of construction machinery shot blasting equipment. Background technique [0002] With the rapid development of social economy, the problems of energy shortage and environmental pollution are becoming more and more serious, and all countries have put the reduction of energy consumption and environmental protection on the agenda. At the same time, the energy efficiency ratio is one of the key parameters of hydraulic excavator market competition, so the research and application of energy-saving technology for hydraulic excavators is particularly necessary. [0003] At present, the research on oil-hydraulic hybrid technology has been included in the national 13th Five-Year Science and Technology Support Plan, such as the research and application of hydraulic hybrid energy-saving technolo...

AI Technical Summary

Problems solved by technology

It is directly used to drive the working cylinder or motor. Although the transmission efficiency is high, it affects the control performance of the whole machine

Indirect utilization means that the recovered energy is released through the auxiliary motor and drives the hydraulic main pump together with the engine. This energy release method has no effect on the controllability of the whole machine, but there are many transmission links and the energy utilization efficiency is low.

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