Rotary energy saving system of excavator

A technology of turning energy-saving and excavator, applied in the direction of earth mover/shovel, construction, etc., can solve the problems of increasing the cost of the whole machine and the complexity of the system, and achieve the effect of reducing the overflow loss and ensuring the working performance.

Inactive Publication Date: 2013-02-06
ZHEJIANG UNIV
View PDF8 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this needs to change the hydraulic system mechanism, which makes t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary energy saving system of excavator
  • Rotary energy saving system of excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Such as figure 1 As shown, the excavator rotary energy-saving system of the present invention includes a variable hydraulic pump 1, a pilot hydraulic pump 2, an overflow valve 3, a multi-way valve 4, a shuttle valve 5, a pilot oil circuit control handle 6, a flow control valve 7, a first overload Buffer valve 8 , first one-way valve 9 , rotary motor 10 , second one-way valve 11 , second overload buffer valve 12 , pressure sensor 13 , controller 14 , electromagnetic proportional pressure reducing valve 15 and oil tank 16 . The oil outlet of the variable hydraulic pump 1 is connected with the oil inlet P of the multi-way valve 4 and the oil inlet of the overflow valve 3; the oil outlet of the overflow valve 3 is connected with the oil tank 16, which is used to limit the maximum pressure of the system. The oil return port T of the multi-way valve 4 is connected with the fuel tank 16; the first pilot oil port a of the multi-way valve 4 is connected with the first pilot oil ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a rotary energy saving system of an excavator. When the excavator rotates to be started, corresponding flow is supplied according to a demand of a rotary motor, so that overflow loss of the system is reduced. A flow control valve is arranged between an overload buffering valve and an oil tank. In a process of accelerating rotary starting, the flow control valve works in a throttling mode; flow, namely overflow of the system, of the flow control valve is calculated according to pressure at an oil inlet of the flow control valve, and the discharge capacity of a hydraulic pump is adjusted according to the overflow of the system; when the overflow is increased, the discharge capacity of the hydraulic pump is reduced, so that most of the pump output flow is absorbed by the rotary motor, and energy loss is reduced; when the overflow is reduced, the discharge cavity of the hydraulic pump is improved, so that the requirement of the rotary motor can be met; moreover, the inlet pressure of the rotary motor is always kept at an overflow pressure value, and the rotary torque is increased, so that the rotary acceleration performance is guaranteed; and in a process of rotary deceleration brake, the flow control valve works in a direct through mode, so that oil can be normally filled into the rotary motor.

Description

technical field [0001] The invention relates to the technical field of engineering machinery energy saving, in particular to an excavator rotary energy saving system. Background technique [0002] The slewing system occupies a very important position in the working process of hydraulic excavators. In each working cycle of the excavator, two rotations are required: full bucket rotation and empty bucket rotation, and each rotation includes at least two processes of starting acceleration and deceleration braking. Due to the large mass and large inertia of the body of the excavator, the acceleration is very slow. In the initial stage of start-up, the rotation speed of the swing motor is low, and the flow demand is small. The output flow of the hydraulic pump is much greater than the flow required by the swing motor. The excess flow overflows through the overload buffer valve, resulting in a large amount of energy loss. This part of energy loss will not only increase fuel consu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E02F9/22
Inventor 彭贝高宇冯培恩赵峰潘军威
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap