An integrated valve for energy recovery of excavator with anti-overload function

Abstract

The invention discloses an integrated valve used for excavator energy recovery and having an overload prevention function, comprising a valve body, the valve body is provided with a first oil port A1, a first pressure port P1, a second pressure port P2, a third pressure port Pressure port P3; the first oil port A1 communicates with the second pressure port P2 through the first external oil circuit of the integrated valve, and a first check valve is set at the second pressure port P2; the first pressure port P1 and the second A second one-way valve is also arranged on the internal oil circuit of the integrated valve between the pressure ports P2; a first slide valve, a first logic valve, and a first logic control valve are also arranged in the valve body. An overload valve chamber is arranged in the valve body, and an overload valve is arranged in the overload valve chamber. The integrated valve used for excavator energy recovery and having the function of preventing overload can recover the energy when the boom of the excavator is lowered, can prevent excessive recovered energy from damaging the external energy storage device, has good working reliability, and saves energy. energy advantages.

Description

technical field [0001] The invention relates to an integrated valve, in particular to an integrated valve used for excavator energy recovery and having the function of preventing overload. Background technique [0002] Excavator, also known as excavating machinery (excavating machinery), is an earth-moving machine that uses buckets to dig materials higher or lower than the bearing surface, and loads them into transport vehicles or unloads them into stockyards. The materials excavated by the excavator are mainly soil, coal, sediment, and pre-loose soil and rock. Judging from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators have become one of the most important construction machinery in engineering construction. Today's excavators account for the vast majority of fully hydraulic full-slewing excavators. The hydraulic transmission system of the excavator transmits the power of the engine to the hydraul...

AI Technical Summary

Problems solved by technology

Although this utility model introduces the energy recovery system of the excavator, it does not introduce the special valve for the energy recovery of the excavator

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