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Pilot control oil way of super-tonnage excavator and control method

A pilot-controlled, super-large tonnage technology, used in earth movers/shovels, mechanical equipment, engine components, etc., can solve problems such as consuming hydraulic energy, reduce energy consumption, and avoid high-pressure overflow.

Active Publication Date: 2020-12-01
XUZHOU XCMG MINING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, according to different working conditions, the existing pilot system is often in the state of high pressure overflow, which consumes hydraulic energy

Method used

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  • Pilot control oil way of super-tonnage excavator and control method
  • Pilot control oil way of super-tonnage excavator and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A super large tonnage excavator pilot control oil circuit,

[0027] The pressure oil of the pilot pump is respectively connected to the 10Psv port of the variable pump, the solenoid valve A2, and the solenoid valve A1;

[0028] The first oil outlet of the solenoid valve A2 is connected to the fuel tank through the throttle valve 9, and the second oil outlet of the solenoid valve A2 is respectively connected to the solenoid valve group 1 and the overflow valve 6;

[0029] The oil outlet of the solenoid valve A1 is connected to the motor in the butter filling system; a check valve S1 is installed in the oil circuit between the pressure oil of the pilot pump and the solenoid valve A1; a check valve S1 is installed in the oil circuit between the solenoid valve A1 and the motor in the butter filling system A pressure reducing valve 4 is installed in the oil circuit, and the pressure reducing valve is an adjustable pressure reducing valve, so as to prevent the motor from bein...

Embodiment 2

[0032] A super-large-tonnage excavator pilot control oil circuit control method, on the basis of the first embodiment above, includes the following steps:

[0033] In this embodiment, the solenoid valve A2 is used to switch between high and low pressure;

[0034] After the excavator starts,

[0035] When the safety handle is not opened, the solenoid valve A1 is energized; the pressure oil of the pilot pump first returns to the oil tank through the solenoid valve A2 and the throttle valve 9, and the back pressure is generated through the throttle valve, and the pressure is 20 bar, which is the enabling of the variable displacement pump 10 The control port Psv and the oil supply of the butter filling system; specifically: the second channel of pilot pump pressure oil controls the enable control port Psv of the variable pump 10, so that the variable pump 10 starts to work; the third channel of pilot pump pressure oil passes through the one-way Valve S1, solenoid valve A1, pressu...

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Abstract

The invention discloses a pilot control oil way of a super-tonnage excavator and a control method, and belongs to the field of engineering machinery. Pilot pump pressure oil is respectively connectedwith a variable pump Psv port, an electromagnetic valve A2 and an electromagnetic valve A1; a first oil outlet of the electromagnetic valve A2 is connected to an oil tank through a throttle valve, anda second oil outlet of the electromagnetic valve A2 is connected with an electromagnetic valve group and an overflow valve respectively; an oil outlet of the electromagnetic valve A1 is connected toa motor in a grease filling system; and the electromagnetic valve group is connected with a Pi port and a Pp port of a variable pump and a main valve pilot valve group. After the excavator is started,the pilot oil way provides proper pressure for different mechanisms according to actual working conditions, long-term high-pressure overflow of a pilot system is avoided, and energy consumption is reduced; and a vehicle-mounted controller periodically controls the electromagnetic valves for driving the grease filling system, all mechanisms of the excavator are efficiently lubricated, a pressure reducing valve is arranged on a driving oil way of the grease filling system, and the pressure of a driving motor is not affected by pressure switching.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a super-large tonnage excavator pilot control oil circuit and a control method. [0002] technical background [0003] The pilot system of super-large tonnage excavators is different from that of small and medium-sized excavators. The pilot system not only provides pilot pressure for the control of the main valve, but also provides pressure for the enable control port, power and displacement control port, and butter system of the main pump. Different functions require different pressures. The pilot control oil port of the main valve requires a pressure of about 50 bar, while the enabling control port of the main pump and the driving pressure of centralized lubrication only need 20 bar. Therefore, according to different working conditions, the existing pilot system is often in a state of high-pressure overflow, which consumes hydraulic energy. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/00F15B13/02F15B13/043F15B1/02F16N7/38E02F9/22
CPCF15B11/00F15B13/02F15B13/025F15B13/043F15B1/021F16N7/38E02F9/22F15B2211/6355
Inventor 胡义秦家升石立京刘松阳史继江王春磊李志鹏王正华吕建森李寿鹏唐晓鹏李县军刘邓孙文庆周显周开坤高旭刘凯郑杨
Owner XUZHOU XCMG MINING MACHINERY CO LTD
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