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Loader working device hydraulic system

A technology of working device and hydraulic system, applied in the direction of earth mover/shovel, construction, etc., can solve the problems of large overflow loss and high cost, reduce the power loss of the hydraulic system, avoid high cost problems, improve The effect of power matching

Inactive Publication Date: 2014-10-22
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

[0008] In order to solve the large overflow loss in the existing loader double-pump confluence system or double-pump confluence equivalent unloading system, further reduce the power loss of the hydraulic system of the loader working device, and optimize the power matching between the pump and the load , while avoiding the excessive cost caused by the use of the variable pump, the invention provides a hydraulic system for the working device of the loader

Method used

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  • Loader working device hydraulic system
  • Loader working device hydraulic system

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Embodiment Construction

[0022] The hydraulic system principle of the loader working device of the present invention is as follows: figure 1 As shown, it consists of boom hydraulic cylinder (1), bucket hydraulic cylinder (2), multi-way reversing valve (3), oil filter (4, 7), hydraulic oil tank (5), working pump (6), It consists of a check valve (8), an equivalent unloading valve (9), an auxiliary pump (10), and a confluence control valve (11). The working pump (6) and the auxiliary pump (10) form a dual-pump system to deliver hydraulic oil to the hydraulic system. The oil outlet of the working pump (6) is connected to the multi-way reversing valve (3). A1 and B1 are respectively connected to the two chambers of the boom hydraulic cylinder (1), A2 and B2 are respectively connected to the two chambers of the bucket hydraulic cylinder (2); the oil outlet of the auxiliary pump (10) is connected to the P1 of the confluence control valve (11). The position of the spool of the confluence control valve (11) ...

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Abstract

The invention discloses a hydraulic system of a loading machine working device, which belongs to the technical field of engineering machinery. Under different conditions, a handle is adopted to control whether an auxiliary pump and a working pump jointly supply oil for the working device in a flow converging mode, the problems that the hydraulic system of an existing working device is high in power loss and poor in matching of the pump and load, and simultaneously high cost of using two variable pumps is avoided. The hydraulic system of the loading machine working device comprises a movable arm hydraulic cylinder, a rotating bucket hydraulic cylinder, a multi-way reserving valve, an oil filter, an oil tank, the working pump, the auxiliary pump, an equivalent unloading valve and a flow converging control valve. The hydraulic system mainly used for a loading machine and can also be used for other engineering machinery.

Description

technical field [0001] The invention belongs to the technical field of construction machinery, and in particular relates to a hydraulic system of a loader working device. Background technique [0002] As we all know, the main operation methods of the reloader are shoveling operation and loading operation. In order to operate efficiently, the working device needs to frequently collect buckets, lift, unload, and lower. These actions are controlled and realized by the hydraulic system. [0003] The hydraulic system of the working device of the loader is composed of a working pump, a reversing multi-way valve, a hydraulic cylinder, pipelines and other accessories. The main reason for the energy loss of the hydraulic system of the loader working device is that the output flow and output pressure of the pump cannot match the flow and pressure required by the load, and there are more overflow losses, throttling losses and neutral unloading losses. [0004] In order to match the pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22
Inventor 韩嘉骅袁成谭兆钧
Owner SICHUAN UNIV
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