Closed-type rotary hydraulic system for crane and crane
A hydraulic system and crane technology, applied in the field of closed rotary hydraulic system, can solve the problems of large number of hydraulic pipelines and control components, shock during start, stop and rotary process, complex closed system, etc., and achieve ideal rotary effect. The effect of improving reliability and simplifying the operation process
Active Publication Date: 2013-06-05
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology
[0014] The closed system realizes the stable control of the rotation through the closed variable variable pump and the two-speed valve group. Although it can meet the requirements of the crane to a certain extent, there are still certain impacts during the start, stop and rotation process, and it cannot Avoid instantaneous impact caused by load mutation
[0015] In addition, the closed system is too complicated, and the number of hydraulic pipelines and control components is too large. Not only the manufacturing cost is high, but also the maintenance is difficult. There may be many fault points, and the probability of rotation fault is relatively high. When performing free sliding, it is necessary to operate multiple control valves to coordinate actions, which puts forward higher requirements for operators
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[0036] The core of the present invention is to provide a crane closed rotary hydraulic system. The hydraulic system has very reliable and stable performance in the process of starting, stopping and turning, and the hydraulic structure is relatively simple.
[0037] 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.
[0038] Please refer to figure 2 , figure 2 It is the hydraulic principle diagram of the closed slewing hydraulic system of the crane provided by the present invention.
[0039] In a specific embodiment, the crane closed rotary hydraulic system provided by the present invention includes a closed hydraulic pump 10 and a rotary motor 20, the oil outlet of the closed hydraulic pump 10 is connected with the oil inlet of the rotary motor 20, and the rotary The oil outlet of the m...
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Disclosed is a closed rotary hydraulic system for a crane, comprising a closed hydraulic pump (10) and a rotary motor (20). An oil outlet of the closed hydraulic pump (10) is connected to an oil inlet of the rotary motor (20). An oil outlet of the rotary motor (20) is connected to an oil inlet of the closed hydraulic pump (10). The system is characterized in that same further comprises a damper (30). The damper is parallel on a hydraulic circuit to the rotary motor (20). The hydraulic system is provided with smooth performance of great reliability during start, stop, and rotation processes, and with a relatively simple hydraulic structure. Also disclosed is the crane having the closed rotary hydraulic system for same.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a closed rotary hydraulic system of a crane. The invention also relates to a crane provided with said closed slewing hydraulic system. Background technique [0002] A crane is a kind of construction machinery that uses a boom to lift heavy objects during work, and then relies on the turntable to rotate the heavy objects from one position to another. [0003] The slewing mechanism is a device for the slewing part of the crane to realize slewing motion relative to the non-swinging part. The function of the slewing mechanism is to make the upper part of the car rotate around the slewing center of the crane, and connect the upper car and the lower car in the form of rolling support. Integral, so that the load on the vehicle is transmitted to the chassis frame, and its dynamic characteristics directly affect the working characteristics of the entire crane. [0004] The...
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IPC IPC(8): B66C23/86
CPCB66C23/86
Inventor 禹阳华程度旺双志
Owner SANY AUTOMOBILE HOISTING MACHINERY