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Double engine-driven closed hydraulic system of main actuating mechanism of caterpillar crane

The technology of a crawler crane and an actuator is applied in the field of hydraulic system, which can solve the problems of reducing operating cost, disadvantage, and high energy consumption, and achieve the effects of improving safety redundancy, improving power utilization rate, and reducing production cost.

Active Publication Date: 2010-11-10
ZHEJIANG SANY EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating flexibility of this structure is relatively insufficient, and it consumes a lot of energy, which is not conducive to reducing operating costs

Method used

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  • Double engine-driven closed hydraulic system of main actuating mechanism of caterpillar crane
  • Double engine-driven closed hydraulic system of main actuating mechanism of caterpillar crane
  • Double engine-driven closed hydraulic system of main actuating mechanism of caterpillar crane

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] Usually, the main actuators of crawler cranes include main hoisting hoist, auxiliary hoisting hoist, main luffing hoist, auxiliary luffing hoist, super-lifting luffing hoist, slewing mechanism, left traveling mechanism and right traveling mechanism, etc. Therefore, the hydraulic system of the crawler crane needs to supply energy for the above-mentioned main actuators. This requires relatively large power for the hydraulic system, and relatively high requirements for operational flexibility.

[0024] figure 1 It is a schematic diagram of a preferred embodiment of the closed hydraulic system of the main actuator of the crawler crane driven by dual engines of the present invention. As shown in the figure, the closed hydraulic system includes a first engine 1 and a second engine 2 , a first closed pump set 3 , a second closed pump set 4 , a switching val...

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Abstract

The invention provides a double engine-driven closed hydraulic system of a main actuating mechanism of a caterpillar crane, which comprises a first engine, a second engine, a first closed pump set, a second closed pump set, a plurality of switching valves an a plurality of main execution mechanisms, wherein the first engine and the second engine are respectively connected to the first closed pump set and the second closed pump set, the plurality of switching valves are respectively connected to the first closed pump set or the second closed pump set, and the plurality of main execution mechanisms are connected to the plurality of switching valves. By adopting two engines with smaller power to replace a single engine with larger power and two same closed pump sets, the double engine-driven closed hydraulic system of the main actuating mechanism of the caterpillar crane realizes the execution mechanism with larger hoisting capacity is driven by the engine with smaller power and pumps with smaller delivery capacity. Meanwhile, by using the switching valve sets, all the execution mechanisms can be driven by using the single engine.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a closed hydraulic system of a main actuator of a crawler crane driven by two engines. Background technique [0002] In the hydraulic transmission system of construction machinery, it can be divided into open system and closed system according to the different oil circulation methods. Among them, in the open hydraulic system, the oil in the motor or oil cylinder returns to the oil tank, and the pump directly sucks oil from the oil tank; while in the closed hydraulic system, the oil in the motor or oil cylinder does not return to the oil tank, but is directly connected to the inlet of the pump. oil port. [0003] At present, the hydraulic system of the main actuator of the domestic and most foreign crawler cranes mainly adopts an open system, which has a simple structure and poor stability of motion, and is mostly used for small-tonnage cranes. Since the balance valve must be used in the op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/12B66C23/36F15B11/17F15B13/06
Inventor 鲁湖斌彭继文
Owner ZHEJIANG SANY EQUIP
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