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Rotary system and crane

A slewing system and slewing motor technology, applied in cranes, mechanical equipment, fluid pressure actuating devices, etc., can solve problems such as the influence of the operator's operating proficiency, improve fretting and stability, improve performance, improve The effect of precision

Active Publication Date: 2014-12-10
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The inventors found that there are at least the following problems in the prior art: in the existing solutions, the micro-control of the rotation is basically controlled by the handle, which is largely affected by the operating proficiency of the operator

Method used

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Embodiment Construction

[0051] Combine below figure 2 A more detailed elaboration of the technical solution provided by the present invention, a technical solution obtained by replacing any technical means provided by the present invention or combining any two or more technical means or technical features provided by the present invention with each other All should be within the protection scope of the present invention.

[0052] An embodiment of the present invention provides a slewing system, including: a working oil pump 22 , a micro-motion oil pump 23 , a rotary reversing valve 27 , and a switching valve 26 . The working oil pump 22 is used to provide working pressure oil for the rotary reversing valve 27 , and the working pressure oil is used to flow to the rotary motor 33 to realize the working steering of the rotary motor 33 . The inching oil pump 23 is used to provide the inching pressure oil for the rotary reversing valve 27 , and the inching pressure oil is used to flow to the slewing mot...

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Abstract

The invention discloses a rotary system and a crane, relates to the field of engineering machinery and is used for optimizing the performance of an existing crane rotary control system. The rotary system comprises a working oil pump, a micro oil pump, a rotary reversing valve and a changeover valve; the working oil pump is used for providing working pressure oil for the rotary reversing valve, and the working pressure oil flows to a rotary motor so as to realize the working steering of the rotary motor; the micro oil pump is used for providing micro pressure oil for the rotary reversing valve, the micro pressure oil flows to the rotary motor so as to realize the micromotion of the rotary motor; when the changeover valve is in an electric state, only the micro pressure oil provided by the micro oil pump can flow to the rotary motor; when the changeover valve is in a power-loss state, only the working pressure oil provided by the working oil pump can flow to the rotary motor through the rotary reversing valve. According to the technical scheme, the micro control of the rotary motor can be realized.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a slewing system and a crane. Background technique [0002] The slewing mechanism is one of the important executive mechanisms for lifting heavy objects in construction cranes. It is used to drive the upper part of the crane to slew and undertake functions such as item transfer, requiring high safety and stability. [0003] The crane slewing control system generally consists of a hydraulic circuit consisting of a pump, a slewing motor, and a slewing buffer valve. In the actual use process, due to the complex operating environment of the crane and the large moment of inertia of the upper vehicle, the hoisted load is shaken by external interference or the influence of its own factors such as the manufacturing accuracy of structural parts and assembly errors during the rotation of the slewing mechanism. Cause fluctuations in load pressure. [0004] It is difficult for the exis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/84F15B13/02
Inventor 崔向坡李亚朋刘中兴李雅彬张耀成
Owner XUZHOU HEAVY MASCH CO LTD
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