Recovered energy utilization system of excavator

Abstract

The invention discloses a recovered energy utilization system of an excavator. The recovered energy utilization system is mainly composed of a pump-controlled fan motor loop, an energy-accumulator-controlled fan motor loop and an energy-accumulator-controlled drive motor loop. A hydraulic motor used for independent cooling is directly driven through recovered energy stored in an energy accumulator, no other links exist in the process, and the transmission efficiency is high. Meanwhile, the recovered energy is not coupled with a working oil cylinder or a motor, and the complete-machine control performance is not influenced. The energy-accumulator-controlled drive motor loop and the pump-controlled fan motor loop are designed, and when the environment temperature is low, independent cooling is not needed for excavator hydraulic oil or an engine cooling water system or when the energy of the energy accumulator cannot meet the energy requirement of an independent cooling system. According to the system, the energy-accumulator-controlled fan motor loop can be turned off and switched to the energy-accumulator-controlled drive motor loop, or the energy-accumulator-controlled drive motor loop can be turned off and switched to the pump-controlled fan motor loop. In this way, the recovered energy can be efficiently utilized, and reliable work of the independent cooling system is also ensured.

Description

technical field [0001] The invention relates to a recovery energy utilization system, in particular to an excavator energy recovery utilization system, which belongs to the technical field of excavator energy recovery. 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. 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 technology based on excavator energy recovery, mainly...

AI Technical Summary

Problems solved by technology

Direct use means that it is directly used to drive the working cylinder or motor. Its transmission efficiency is high, but it affects the control performance of the whole machine

Indirect utilization refers to the release of recovered energy through the auxiliary motor, which drives the main hydraulic 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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