Pile-up valve for energy recovery of excavator and with overload preventing function
An energy recovery and excavator technology, applied in mechanical equipment, fluid pressure actuating devices, servo motor components, etc., can solve problems such as the introduction of special valves for energy recovery of non-excavators, and achieve the effect of good work reliability and energy saving
Active Publication Date: 2014-12-10
HEFEI CHANGYUAN HYDRAULICS
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[0036] see attached figure 1 ~attached Figure 11 , An integrated valve of the present invention for energy recovery of excavators and with anti-overload function includes a valve body 1, and the valve body 1 is provided with a first oil port A1, a first pressure port P1, and a second pressure port. P2, the third pressure port P3; the first oil port A1 is communicated with the second pressure port P2 through the first external oil circuit 22 of the integrated valve, and a first single pressure port is provided at the second pressure port P2 valve 2, so that the hydraulic oil at the first oil port A1 can flow to the second pressure port P2 in one direction through the external oil circuit; the first pressure port P1 and the second pressure port P2 A second one-way valve 3 is also set on the internal oil circuit of the integrated valve between the two, so that the hydraulic oil can only flow from the second pressure port P2 to the first pressure port P1 in one direction when th...
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The invention discloses a pile-up valve for energy recovery of an excavator and with the overload preventing function. The pile-up valve comprises a valve body. A first oil port A1, a first pressure port P1, a second pressure port P2 and a third pressure port P3 are formed in the valve body. The first oil port A1 is communicated with the second pressure port P2 through a first external oil duct of the pile-up valve, and a first one-way valve is arranged on the second pressure port P2. A second one-way valve is arranged on the portion, between the first pressure port P1 and the second pressure port P2, of an internal oil duct of the pile-up valve. A first slide valve, a first logic valve and a first logic control valve are arranged in the valve body. An overload valve cavity is formed in the valve body, and an overload valve is arranged in the overload valve cavity. The pile-up valve for energy recovery of the excavator and with the overload preventing function has the advantages that energy generated in the descent process of a large arm of the excavator can be recovered, the situation that due to the fact that recovered energy is too large, an external energy storage device is damaged can be avoided, work reliability is good, and energy is saved.
Description
technical field [0001] The invention relates to an integrated valve, in particular to an integrated valve used for energy recovery of excavators and with overload prevention function. Background technique [0002] Excavators, also known as excavating machinery, are earthmoving machinery that uses buckets to excavate materials above or below the bearing surface and load them into transport vehicles or unload them to stockpiles. The materials excavated by the excavator are mainly soil, coal, silt, soil and rock after pre-loosening. 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. The vast majority of today's excavators are fully hydraulic azimuth excavators. The hydraulic transmission system of the excavator transmits the power of the engine to the actuators such as the hydraulic motor and the hydrau...
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IPC IPC(8): F15B13/02
Inventor 杨威陶新高张勇刘勇管燕梅贾玲玲姜朋朋蔡伟
Owner HEFEI CHANGYUAN HYDRAULICS