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Hydraulic closed system, hydraulic closed walking system and hydraulic closed winding system

A closed system and hydraulic technology, which is applied in the field of hydraulic closed system, hydraulic closed walking and winch system, can solve the problems of uncontrollable downhill driving speed of the vehicle, overspeeding of the engine at 101 rpm, etc., and achieve the reduction of speeding "speeding" "Phenomenon, reduce overspeed" speeding, and reduce the effect of using power

Inactive Publication Date: 2017-03-29
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the hydraulic pump 102 is in the working condition of the hydraulic motor 103, and is working at the maximum displacement, and the driving torque provided will be the largest. If the torque of the hydraulic pump 102 at this time exceeds the maximum friction resistance torque of the engine 101, it will cause the engine 101 The speed is speeding, and the speed of the vehicle going downhill is uncontrollable

Method used

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  • Hydraulic closed system, hydraulic closed walking system and hydraulic closed winding system
  • Hydraulic closed system, hydraulic closed walking system and hydraulic closed winding system
  • Hydraulic closed system, hydraulic closed walking system and hydraulic closed winding system

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Embodiment Construction

[0038] The core of the present invention is to provide a hydraulic closed system to reduce the engine power without reducing the target speed, save energy consumption, and avoid overspeeding of the engine speed when going downhill;

[0039] Another core of the present invention is to provide a hydraulic closed traveling system and a hydraulic closed winch system.

[0040] Hereinafter, an embodiment will be described with reference to the drawings. In addition, the examples shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solution of the invention described in the claims.

[0041] see image 3 and Figure 4 , image 3 Schematic diagram of the structure of the hydraulic closed walking system provided by the embodiment of the present invention; Figure 4 It is a schematic structural diagram of the hydraulic clo...

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Abstract

The embodiment of the invention discloses a hydraulic closed system. The hydraulic closed system comprises a hydraulic pump, a hydraulic motor, a third pipeline and a throttling valve, wherein an oil outlet of the hydraulic pump communicates with an oil inlet of the hydraulic motor through a first pipeline, and an oil outlet of the hydraulic motor communicates with an oil inlet of the hydraulic pump through a second pipeline; one end of the third pipeline communicates with the first pipeline, and the other end of the third pipeline communicates with the second pipeline; and the throttling valve is connected in series with the third pipeline. As for the normal working conditions, the displacement of the hydraulic pump can be reduced under the condition of keeping the original output speed unchanged, so that the service power of an engine can be lowered, and accordingly, the energy consumption can be reduced. As for the motored conditions of the hydraulic pump, the throttling valve can be opened and kept at a certain opening degree, meanwhile, displacement changes of the hydraulic pump are adjusted to reduce overspeed 'running away' phenomena while keeping the output speed of the hydraulic motor not reduced. The invention further discloses a hydraulic closed walking system and a hydraulic closed winding system.

Description

technical field [0001] The invention relates to the technical field of hydrostatic drive, and more specifically, relates to a hydraulic closed system, a hydraulic closed walking and hoisting system. Background technique [0002] The hydrostatic drive is a hydraulic closed system consisting of a hydraulic pump and a hydraulic motor. The hydraulic pump absorbs the power of the engine and converts it into hydraulic energy, and the hydraulic motor converts the hydraulic energy into kinetic energy and drives the vehicle or crawler through the transmission device. [0003] Hydrostatic drive has the absolute advantages of simple structure, low noise, large starting torque, high reliability and high operating comfort, and it is mainly used in the field of mobile machinery (construction machinery, agricultural machinery, municipal machinery and some special vehicles, etc.). [0004] Such as figure 1 and figure 2 As shown, the hydraulic pump 102 is driven to rotate by the engine 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D1/08
CPCB66D1/08
Inventor 高文攀刘志政李鹏冲刘永正王刚
Owner WEICHAI POWER CO LTD
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