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Hydraulic starting system and method and engineering machine

A technology of hydraulic starting and hydraulic system, applied in the hydraulic field, can solve the problems of ordinary engines not starting normally, and achieve the effect of cold starting

Inactive Publication Date: 2017-12-01
SHANTUI CONSTR MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a hydraulic starting system, which can solve the problem that ordinary engines cannot be started normally in the low temperature environment in the prior art

Method used

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  • Hydraulic starting system and method and engineering machine

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Embodiment Construction

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0033] This embodiment provides a hydraulic starting system, which can realize normal starting in a low temperature environment. Such as figure 1 As shown, the system includes a power mechanism 1, a quantitative pump, a solenoid valve, an execution system and a hydraulic oil tank. The oil inlet is connected, and the oil outlet of the electromagnetic valve and the oil outlet of the executive system are respectively connected with the hydraulic oil tank.

[0034] When the ambient temperature of the hydraulic starting system is low, the solenoid valve is energized and opened, and the power mechanism provides driving power for the quantitative pump to make the quantitative pump suck hydrauli...

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Abstract

The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic starting system and method used at the low temperature and an engineering machine. The system comprises a power mechanism, a metering pump, an electromagnetic valve, an execution system and a hydraulic oil tank; the power mechanism provides driving power for the metering pump, an oil supply path of the metering pump is communicated with an oil inlet of the electromagnetic valve and an oil inlet of the execution system, and an oil outlet of the electromagnetic valve and an oil outlet of the execution system are communicated with the hydraulic oil tank; when the electromagnetic valve is powered on and opened, the power mechanism provides driving power for the metering pump so as to enable the metering pump to suck hydraulic oil from the interior of the oil tank, one part of hydraulic oil flowing out of the metering pump enters the execution system, the other part of the hydraulic oil flowing out of the metering pump enters the electromagnetic valve, the pressure difference of the electromagnetic valve is far less than the maximum pressure relief value of the metering pump, and when the power mechanism is started, the resistance moment of the execution system to the power mechanism is reduced, and cold starting of the power mechanism is achieved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic starting system, method and engineering machinery used at relatively low temperatures. Background technique [0002] When the full hydraulic bulldozer engine starts normally, it needs to completely overcome various resistance moments, which include the engine itself, and also the follow-up load generated by the hydraulic system running with the engine when the engine starts. At present, part of the hydraulic system of a full hydraulic bulldozer is a system in which the hydraulic source is a quantitative pump. When the engine is started, the quantitative pump runs together with the engine, which will generate a certain follow-up load on the engine. [0003] Under normal circumstances, when the engine of a fully hydraulic bulldozer is started, it can overcome the follow-up load generated by the hydraulic system. However, when the ambient temperature is low, especial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/00
CPCF15B11/00
Inventor 宋金宝林嘉栋赵建军桑月仙刘喜明
Owner SHANTUI CONSTR MASCH CO LTD
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