Hydraulic control system and engineering machine

A technology of hydraulic control system and braking system, which is applied in the fields of construction machinery and hydraulic control system, can solve the problems of scattered structure and layout of the whole machine, increased components, and increased production cost.

Inactive Publication Date: 2012-04-18
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This will inevitably increase the number of components required, which not only increases the production cost, but also makes the structural layout of the whole machine more scattered.

Method used

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  • Hydraulic control system and engineering machine
  • Hydraulic control system and engineering machine

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Embodiment Construction

[0015] Below will combine the preferred embodiment of the present invention figure 1 , clearly and completely describe the technical solutions in the embodiments of the present invention.

[0016] The invention provides a hydraulic control system, which is applied to engineering machinery such as graders, off-road cranes, loaders and the like. The hydraulic control system includes a load-sensing variable pump 1, a filter 2 connected to the load-sensing variable pump 1, a shuttle valve 3, a braking system and a cooling system integrated with the braking system.

[0017] The load sensitive variable pump 1 is used for adaptively controlling the power of the fan motor 22 and the brake 11 . The load sensitive variable pump 1 has pressure and flow adaptive characteristics, and it can output pressure oil suitable for the working pressure of the fan motor 22 , thereby realizing the rotation of the fan motor 22 . The load sensitive variable pump 1 can also output pressure oil suitabl...

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Abstract

The invention provides a hydraulic control system. The system comprises a load sensitive variable pump, a shuttle valve, a braking system and a radiating system integrated with the braking system, wherein the load sensitive variable pump is respectively connected with the braking system and the radiating system; the braking system and the radiating system are connected with the shuttle valve; and the shuttle valve is connected with a load sensitive control oil port of the load sensitive variable pump. The hydraulic control system comprises the braking system and the radiating system integrated with the braking system, so that an engineering machine can be radiated and braked simultaneously; and compared with the conventional independent braking system and radiating system, the two integrated systems have the advantages of compact structure layout and the like.

Description

technical field [0001] The invention relates to a hydraulic control system and construction machinery using the hydraulic control system. Background technique [0002] Construction machinery, especially motor graders, during heavy-load operations or high-speed transitions, will generate a lot of heat in their hydraulic systems and power systems, causing the temperature rise of the working medium to be too high; Medium temperature is low. If the working medium is too high or too low, it will have an adverse effect on the system. Therefore, in order to ensure that the power system and hydraulic system work in their optimum temperature range, it is necessary to design corresponding cooling devices for construction machinery, especially graders, to prevent damage to the system due to excessive temperature differences. At present, construction machinery with higher configuration is usually driven by a fan motor, and the cooling capacity of the system is adjusted by changing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/14F15B21/04
Inventor 陈强郑鹏飞熊卫民
Owner SANY HEAVY IND CO LTD (CN)
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