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Hydraulic oil distribution controlling device for crane hydraulic system

A technology for distributing control devices and hydraulic systems, applied in fluid pressure actuating devices, mechanical equipment, transportation and packaging, etc., can solve problems such as the inability of the luffing and telescopic parts to work, the operating speed to be low, and the inability to couple pumps. To achieve the effect of convenient flow distribution scheme and improve operation efficiency

Inactive Publication Date: 2008-07-30
SANY AUTOMOBILE HOISTING MACHINERY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] It can be seen that the luffing and telescoping of the crane in the prior art is only supplied with oil by a specific pump, and cannot be supplied by two pumps at the same time. High, and if the oil pump fails, the luffing and telescopic parts will not work, which also affects the normal operation of the crane

Method used

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  • Hydraulic oil distribution controlling device for crane hydraulic system
  • Hydraulic oil distribution controlling device for crane hydraulic system
  • Hydraulic oil distribution controlling device for crane hydraulic system

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so as to help understand the content of the present invention.

[0022] As shown in FIG. 1 , it is a schematic diagram of a preferred embodiment of a hydraulic oil distribution control device for a crane hydraulic system according to the present invention. The hydraulic oil distribution control device includes a first oil inlet P1 and a second oil inlet P2, and a first oil outlet A1, a second oil outlet A2, a third oil outlet A3 and a fourth oil outlet A4. The first oil inlet P1 can be used to connect with one oil supply pump or multiple pumps according to needs, and the second oil inlet P2 is used to connect with other oil pumps, usually for two pumps. In the manner shown in FIGS. 2 to 10 , the two oil inlets are respectively connected to the first linked pump 2 and the second linked pump 3 . The oil outlets A1 and A2 are respectively connected...

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Abstract

The invention relates to a hydraulic oil distributing and controlling device of a crane hydraulic system, which consists of a first oil inlet and a second oil inlet which are used for communicating with at least two duplex pumps, a first oil outlet and a second oil outlet which are used for supplying oil for a main hoisting motor and an auxiliary hoisting motor as well as a third oil outlet and a fourth oil outlet which are used for supplying oil for a derricking cylinder and a telescopic cylinder; the first oil inlet and the second oil inlet are communicated with the four oil outlets through an oil circuit; control valves are arranged at least on the communicating oil circuits of the first oil inlet and the second oil outlet as well as the third oil outlet and the fourth oil outlet; the control valves are arranged at least on the communicating oil circuits of the second oil inlet and the first oil outlet as well as the second oil outlet and the third oil outlet. The hydraulic oil distributing and controlling device can realize interfluent oil supply of the two duplex pumps so as to improve the operation speed of the corresponding operating condition and operation efficiency, and can use any duplex pump to supply oil respectively to realize a flexible and convenient flow distribution proposal combined by diversified operating conditions.

Description

technical field [0001] The invention relates to a crane, in particular to a hydraulic oil distribution control module for confluence and diversion control in a hydraulic system of the crane. Background technique [0002] The lifting of the main winch and the auxiliary winch of the upper part of most cranes, as well as the luffing of the luffing cylinder and the expansion and contraction of the telescopic cylinder are all hydraulically controlled and driven by the oil pump and hydraulic system. At present, most engineering cranes use multi-pump combined oil supply combined with multi-way valve flow control to control the flow of the four working conditions of the main winch, auxiliary winch, luffing, and telescopic and their combined working conditions. The principle of a typical double-pump crane hydraulic system is shown in Figure 10. The engine drives the first pump and the second pump through the hydraulic oil distribution control device, and controls the two oil pumps to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/20F15B13/02
Inventor 陈林邹兴龙禹阳华刘丹杰
Owner SANY AUTOMOBILE HOISTING MACHINERY
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