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Device for improving linear running performance of excavator during compound action

A compound action and straight-line walking technology, which is applied to earth movers/shovels, construction, etc., can solve problems such as excavator deviation, large load gap, and impact on construction safety, so as to improve performance, facilitate maintenance, and ensure construction safety effect

Active Publication Date: 2013-01-23
XCMG EXCAVATOR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But the actual situation is that it is difficult to maintain the same load on both sides of the travel motor, especially under severe working conditions, the load difference between the two sides of the travel motor is greater. More working oil flows to the travel motor on the side with a smaller load, while less working oil flows into the side with a larger load, which makes the excavator deviate and affects the safety of construction

Method used

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  • Device for improving linear running performance of excavator during compound action
  • Device for improving linear running performance of excavator during compound action
  • Device for improving linear running performance of excavator during compound action

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Embodiment Construction

[0022] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0023] like figure 1 As shown, the present invention includes a first main pump 1, a second main pump 2, a pilot pump 3, a multi-way valve group 15, a left travel pilot valve 8, a right travel pilot valve 10, a left travel motor 11, a right travel motor 17 and Swing motor 16. The oil outlet of the first main pump 1 is connected to the P1 port of the multi-way valve group 15, the oil outlet of the second main pump 2 is connected to the P2 port of the multi-way valve group 15; the oil outlet of the pilot pump 3 is connected to the travel pilot valve P port and the P3 port of the multi-way valve group 15; one oil port of the left travel motor 11 is connected to the Ln port of the multi-way valve group 15, and the other oil port is connected to the Ls port of the multi-way valve group 15; the right travel motor 17 One oil port is connected to the Rs port of the m...

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Abstract

The invention discloses a device for improving the linear running performance of an excavator during compound action and belongs to the technical field of excavators. According to the device, one-way electro-hydraulic proportional pressure valves are additionally arranged in a running control loop; flow sensors are additionally arranged in working loops of running motors, and switch-on and switch-off of signals of the flow sensors are controlled by a pressure valve; flow sensors are additionally arranged in a working loop in a region between a first main pump and a multiple-path valve group and electrically connected to running controllers respectively; and the running controllers compares and analyzes signals measured by the flow sensors, and output the compared and analyzed signals to control output pressure of the electro-hydraulic proportional pressure valves, the opening degrees of running control valve cores in the multiple-path valve group are regulated, and the amount of flow entering the running motor is changed, so that the rotation speeds of the running motors on two sides are equal. The device has the advantages that a running deviation phenomenon due to different loads borne by the two running motors on the two sides during combined action of the excavator is avoided, the linear running performance of the excavator is improved, and the construction safety is guaranteed.

Description

technical field [0001] The invention relates to a device for improving the linear walking performance of an excavator during compound actions, and belongs to the technical field of excavators. Background technique [0002] Hydraulic excavator is a main type of construction machinery and the main mechanical equipment for earthwork excavation. It is widely used in industrial and civil buildings, roads and bridges, municipal engineering, farmland water conservancy and other departments. Excavator actions include walking, slewing, raising and lowering the boom, retracting and swinging the stick, and retracting and turning the bucket. When two or more movements are performed at the same time, it is called a compound movement. Walking compound action usually refers to the operation of swing or boom or bucket while the excavator is moving forward or backward. When the excavator is operated independently, the two main pumps supply oil to the left and right travel motors independen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/20
Inventor 赵守明廖明军陈如健王勇刘和涛顾新建丁跃进刘春花高春生郭会会
Owner XCMG EXCAVATOR MACHINERY
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