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An energy-saving hydraulic system for cranes

A hydraulic system and crane technology, which is applied in the field of energy-saving hydraulic systems for cranes, can solve the problems of large heat generation, poor control performance, and large energy loss in the system, and achieve the effects of stable operation, long service life, and low cost

Active Publication Date: 2018-01-16
SHENGBANG GRP +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of large energy loss, large system heat generation and poor control performance in the existing crane hydraulic system in the background technology, the present invention provides an energy-saving hydraulic system for cranes

Method used

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  • An energy-saving hydraulic system for cranes
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Embodiment 1

[0042] Example 1: See attached figure 2 ; An energy-saving hydraulic system for a crane, comprising an action device, a first control device and a second control device, the action device includes a luffing cylinder 5, a main winding motor 6, a secondary winding motor 7 and a telescopic cylinder 8, the The first control device includes two first pump motors 1 arranged in parallel, and the second control device includes two second pump motors 2 arranged in parallel, the first pump motor 1 and the second pump motor 2 Both are connected to the oil tank 14. The first pump motor 1 is connected to the luffing cylinder 5, the main winding motor 6, and the telescopic cylinder 8 through the first switching valve 3. The second pump motor 2 is switched through the second switch The valve 4 is connected with the luffing oil cylinder 5, the auxiliary winding motor 7, and the telescopic oil cylinder 8. In the present invention, two first pump motors and two second pump motors are provided ...

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Abstract

The invention relates to an energy-saving hydraulic system for a crane. The energy-saving hydraulic system solves the problems that an existing energy-saving hydraulic system for the crane is large in energy loss, large in system heating amount and poor in control performance. The energy-saving hydraulic system comprises an oil tank, an amplitude variation oil cylinder, a main roll motor, an auxiliary roll motor, a stretchable oil cylinder, a first pump motor, a first one-way valve, a second pump motor and a second one-way valve; the first pump motor is connected with the oil tank through the first one-way valve, and the second pump motor is connected with the oil tank through the second one-way valve; the first pump motor is connected with the amplitude variation oil cylinder and the main roll motor through a first switching valve, and the second pump motor is connected with the amplitude variation oil cylinder and the auxiliary roll motor through a second switching valve; and the first pump motor and the second pump motor are both connected with the stretchable oil cylinder through a third switching valve. By means of the energy-saving hydraulic system, smooth switching of all actions is achieved, and the effect of composite actions is improved; and the energy-saving hydraulic system has the beneficial effects of being stable in control, saving energy, recovering energy relatively easily, few in hydraulic element and the like.

Description

Technical field [0001] The invention relates to an energy-saving hydraulic system for cranes. Background technique [0002] Telescopic cranes have the following actions: hoisting, luffing, telescopic and slewing. Hoisting and slewing use motors as actuators, luffing and telescoping using cylinders as actuators. Due to the area ratio of the cylinders, the rod cavity due to the structure of the piston rod makes the effective area of ​​the rod cavity much smaller than that of the rodless cavity. When the oil is in or out, the piston movement speed is the same relative to the rod cavity and the rodless cavity, resulting in asymmetrical oil in and out. Therefore, the telescopic boom crane uses an open hydraulic system. According to the specific principle of the crane, the crane lifts the heavy objects through the hoisting mechanism, and chooses other places to put the heavy objects down. In addition, the luffing cylinder is required to adjust the distance of the heavy objects. There ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/82B66C23/693F15B11/17
CPCB66C23/705B66C23/82F15B11/17
Inventor 姜洪张晓磊王清送张夕航史浙安陈钊汶柯稳
Owner SHENGBANG GRP
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