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Oil supplementing system of rotary motor and excavator

A technology of rotary motor and oil replenishment valve, which is applied in the direction of earth mover/shovel, construction, etc., and can solve the problems of increased oil return back pressure, reduced work efficiency, and increased fuel consumption of excavators, etc.

Pending Publication Date: 2021-06-08
SHANDONG LINGONG CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a setting will increase the oil return back pressure in the hydraulic system, resulting in increased fuel consumption and reduced work efficiency of the excavator

Method used

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  • Oil supplementing system of rotary motor and excavator
  • Oil supplementing system of rotary motor and excavator
  • Oil supplementing system of rotary motor and excavator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 2 As shown, this embodiment provides an oil replenishment system for a rotary motor, including a main pump 1, a hydraulic control reversing valve 2, a pilot oil source valve, a pilot handle 3, a rotary motor 4, a shuttle valve 17 and an oil replenishment valve 18 , the oil outlet of the main pump 1 communicates with the oil inlet of the hydraulic control reversing valve 2, and the first and second working oil ports of the hydraulic control reversing valve 2 correspond to the two oil ports of the rotary motor 4 one by one The oil return port of the hydraulic control reversing valve 2 communicates with the oil tank 15 to form a rotary oil circuit. The main pump 1 supplies oil to the pilot oil source valve, and the oil outlet of the main pump 1 is also connected with the oil inlet of the pilot oil source valve, and one oil outlet of the pilot oil source valve is connected with the oil inlet of the pilot handle 3, and the pilot The two pilot oil outlets of ...

Embodiment 2

[0049] The difference between this embodiment and Embodiment 1 is:

[0050] Such as image 3As shown, in the oil supply system of the rotary motor provided in this embodiment, the rotary reversing valve is an electro-hydraulic reversing valve, the control handle is an electric control handle 19, and the electric control handle 19 is electrically connected with the electro-hydraulic reversing valve for controlling The direction of the electro-hydraulic directional valve is changed, and the two liquid control ends of the electro-hydraulic directional valve are connected with an oil outlet of the pilot oil source valve. The electric control handle controls the opening of the electro-hydraulic directional valve, and the pilot oil in the pilot oil source valve enters the electro-hydraulic directional valve to push the spool of the electro-hydraulic directional valve to move, so that the hydraulic oil in the main pump 1 can be replaced by the electro-hydraulic directional valve. Th...

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Abstract

The invention discloses an oil supplementing system of a rotary motor and an excavator, and relates to the technical field of excavators. The oil supplementing system of the rotary motor comprises a main pump, a rotary reversing valve, a pilot oil source valve, a control handle, the rotary motor and an oil supplementing valve, an oil outlet of the main pump communicates with an oil inlet of the rotary reversing valve, a first working oil port and a second working oil port of the rotary reversing valve communicate with two oil ports of the rotary motor in a one-to-one correspondence mode, the oil outlet of the main pump further communicate with an oil inlet of the pilot oil source valve, one oil outlet of the pilot oil source valve communicates with the rotary reversing valve through the control handle, an oil inlet of the oil supplementing valve communicates with the other oil outlet of the pilot oil source valve, an oil outlet of the oil supplementing valve communicates with the two oil ports of the rotary motor, the oil inlet of the oil supplementing valve is controlled to communicate with the oil outlet of the oil supplementing valve, and the pilot oil source valve can supplement oil for the rotary motor through the oil supplementing valve. According to the excavator with the oil supplementing system of the rotary motor, oil consumption can be remarkably reduced under the condition that cost is not increased, and working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of excavators, in particular to an oil supply system for a rotary motor and an excavator. Background technique [0002] When the excavator is braking the slewing motor, due to the inertia, the slewing motor will not stop rotating immediately, but will continue to slew and compress the oil at the oil outlet of the slewing motor, so that the oil outlet of the slewing motor will generate instantaneous high pressure, and the oil will flow from the relief valve. overflow off. And when the rotary motor continues to rotate, since the main pump has been unable to supply oil to the rotary motor, the oil inlet of the rotary motor needs to be supplemented with oil. [0003] Such as figure 1 As shown, when the excavator is turning, the operator operates the pilot handle 3, connects the pilot oil source valve and pushes the spool of the hydraulic control reversing valve 2, so that the hydraulic oil of the main pump 1 e...

Claims

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Application Information

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IPC IPC(8): E02F9/12E02F9/22
CPCE02F9/123E02F9/2246E02F9/2264E02F9/2267
Inventor 荆玉涛董立队宋旭东郭志学李宣辰张明康
Owner SHANDONG LINGONG CONSTR MACHINERY
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