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Rotary hydraulic system and engineering machinery

A hydraulic system and rotary valve technology, which is applied in mechanical equipment, cranes, fluid pressure actuators, etc., can solve the problems of high impact pressure in the oil circuit of the system, vibration of the rotary mechanism, poor accuracy of oil supply, etc., and reduce energy consumption loss , Improve work efficiency and high accuracy

Pending Publication Date: 2022-06-03
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology

[0003] In view of this, the present invention provides a rotary hydraulic system and a construction machinery

Method used

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  • Rotary hydraulic system and engineering machinery
  • Rotary hydraulic system and engineering machinery
  • Rotary hydraulic system and engineering machinery

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Embodiment Construction

[0025] In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. All directional indications (such as up, down, left, right, front, back, top, bottom...) in the embodiments of the present application are only used to explain the difference between the various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

[0026] Additionally, reference h...

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Abstract

The invention belongs to the technical field of engineering machinery, and particularly relates to a rotary hydraulic system and engineering machinery. The rotary hydraulic system comprises a torque output device used for driving a load to rotate; the rotary control valve group is communicated with the torque output device through an oil path; and the priority valve is communicated with the rotation control valve group through an oil path, and the priority valve can adjust the oil supply amount according to the flow demand of the torque output device. According to the technical scheme, oil can be preferentially supplied to the torque output device, the oil supply amount is adjusted according to the requirement of the torque output device, and therefore the oil supply accuracy is improved, the torque output device stably outputs torque during starting and stopping, the rotation stability is improved, system heating is reduced, and energy consumption losses are reduced.

Description

technical field [0001] The invention belongs to the technical field of construction machinery, and particularly relates to a rotary hydraulic system and a construction machinery. Background technique [0002] In construction machinery such as wheeled cranes, a hydraulic system consisting of a quantitative pump, a quantitative hydraulic motor, a rotary control valve group, and an auxiliary control valve group is usually used to drive the rotary mechanism. However, the existing hydraulic system has low working efficiency and poor oil supply accuracy, resulting in serious system heating and large energy loss, and the system pressure overshoots when starting and stopping, which has a large impact pressure on the system oil circuit, and the slewing mechanism It is easy to produce serious vibration, which affects the normal operation of construction machinery. SUMMARY OF THE INVENTION [0003] In view of this, in order to solve the problems in the prior art that the accuracy of...

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Application Information

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IPC IPC(8): B66C23/86F15B11/08F15B13/04
CPCB66C23/86F15B11/08F15B13/04
Inventor 王炳崔学东胡明
Owner SANY AUTOMOBILE HOISTING MACHINERY
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