Energy-saving hydraulic system for telescopic boom of electric reach stacker
A technology of hydraulic system and telescopic arm, which is applied in the field of energy-saving hydraulic system of electric reach stacker telescopic arm to achieve the effect of eliminating valve-controlled speed regulation and throttling loss
Pending Publication Date: 2021-12-28
HANGCHA GRP
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Problems solved by technology
[0008] The purpose of the present invention is to provide an energy-saving hydraulic system for electric front-mounted telescopic arms, which solves the problem that the pure electric front-mounted telescopic arms can be passively retracted for energy recovery at heavy loads and large angles, and can be actively retracted at light loads and small angles. question
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Please refer to Figure 1 to Figure 3 ,in, figure 1 The principle diagram of the energy-saving hydraulic system of the telescopic arm of the electric front crane provided by the embodiment of the present in...
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The invention discloses an energy-saving hydraulic system for a telescopic boom of an electric reach stacker. An inlet and an outlet of a constant displacement pump / motor are connected with two cavities of a telescopic boom oil cylinder through a second switch valve and a third switch valve respectively; outlets of two safety valves are connected; inlets of the two safety valves are respectively connected with the inlet and the outlet of the constant displacement pump / motor; forward inlets of two hydraulic control one-way valves are connected; outlets of the two hydraulic control one-way valves are connected with the inlet and the outlet of the constant displacement pump / motor respectively; a hydraulic control port of the first hydraulic control one-way valve is connected with an outlet of the second hydraulic control one-way valve; a hydraulic control port of the second hydraulic control one-way valve is connected with an outlet of the first hydraulic control one-way valve; the outlets of the safety valves, the forward inlets of the hydraulic control one-way valves and the oil tank are connected; and an inlet of the second safety valve is connected with the oil tank through a first switch valve. The energy-saving hydraulic system for the telescopic boom of the electric reach stacker solves the problem that the telescopic boom of the pure electric reach stacker can not only passively retract and recover energy under the conditions of heavy load and large angle, but also actively retract under the conditions of light load and small angle.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to an energy-saving hydraulic system for an electric front crane telescopic arm. Background technique [0002] Container reach crane, referred to as reach crane, commonly known as container reach stacker or reach stacker, is a kind of crane used to load and unload containers. When the boom is lowered and the telescopic arm is retracted, a large amount of potential energy is converted into heat through the throttle valve and is wasted. In addition, the converted heat makes the hydraulic oil overheat, and additional energy is consumed to dissipate heat from the hydraulic oil. Therefore, the energy recovery technology of the pure electric reach stacker can greatly improve the efficiency of the hydraulic system and the energy utilization rate of the power battery, and prolong the working time after a single full charge. [0003] Such as figure 2 As shown, the angle of the su...
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IPC IPC(8): B66C13/20B66C23/693F15B13/02F15B21/14H02K7/18
CPCB66C13/20B66C23/705F15B13/02F15B13/027F15B21/14H02K7/1807
Inventor 姚洪
Owner HANGCHA GRP