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Novel 1.5 pump hydraulic system for excavator

A hydraulic system and excavator technology, applied in the field of new 1.5 pump hydraulic system for excavators, can solve the problems of large overflow loss, large oil consumption, low utilization rate of hydraulic oil, etc. Overall operational effect

Active Publication Date: 2013-12-11
SUOTE TRANSMISSION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention proposes a novel 1.5-pump hydraulic system for excavators to solve the above-mentioned problems of low utilization rate of hydraulic oil, large oil consumption, and large overflow loss

Method used

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  • Novel 1.5 pump hydraulic system for excavator
  • Novel 1.5 pump hydraulic system for excavator
  • Novel 1.5 pump hydraulic system for excavator

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Embodiment

[0035] figure 1 It is a schematic diagram of the system of the present invention, figure 2 Main pump, swing motor flow and swing motor pressure curves, image 3 is the pump power curve, Figure 4 It is the pressure curve diagram for swing and boom lift. Please combine Figure 1-4 Shown:

[0036] A novel 1.5-pump hydraulic system for an excavator of the present invention includes a load sensing system and a negative flow control system. 5 and stick one 6, the negative flow control system includes a rotary 7, boom two 8, bulldozing blade 9 and stick two 10, and it is characterized in that the pump of the load sensing system adopts a load sensing variable pump, which is The first pump P1, the structure of the valve body is a plate load sensitive structure, the first pump P1 is equipped with an unloading valve 11 and a flushing valve 12; the pump of the negative flow control system adopts a negative flow pump, which is the second pump P2 ; The negative flow control system i...

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Abstract

The invention discloses a novel 1.5 pump hydraulic system for an excavator. The novel 1.5 pump hydraulic system comprises a load sensitive system and a negative flow control system, wherein the load sensitive system comprises a swing arm 1, a bucket, a left walker, a right walker, a backup device and a bucket rod 1; the negative flow control system comprises a gyrator, a swing arm 2, a dozer blade and a bucket rod 2. The novel 1.5 pump hydraulic system is characterized in that a pump of the load sensitive system adopts a load sensitive variable pump which is a first pump; the structure of a valve body is a plate-type load sensitive structure; the first pump is provided with an unloading valve and a flush valve; a pump of the negative flow control system adopts a negative flow pump which is a second pump; the negative flow control system is a mid-way bypass system; the second pump is provided with a throttle valve; interflow of the first pump and the second pump is external interflow. By using the novel 1.5 pump hydraulic system, a part of wasted oil consumption can be reduced; the overall operability is improved; the targets of good composite operability, and capability of preventing air suction of the swing arms and the bucket rods are achieved.

Description

technical field [0001] The invention relates to an excavator hydraulic system, in particular to a novel 1.5-pump hydraulic system for the excavator. Background technique [0002] With the development of science and technology, construction machinery such as excavators are widely used in construction, water conservancy and other engineering fields, among which hydraulic excavators occupy a dominant position among excavators with their own advantages. The excavator hydraulic system is mainly composed of main pump, main valve, actuator, hydraulic oil and auxiliary components. The main pump and main valve are the core power and control components of the excavator hydraulic system, responsible for providing system pressure and flow It is allocated to each actuator as needed to ensure the smooth movement of each actuator of the excavator and the coordination of the compound action of the excavator. In order to meet the market demand, reducing the fuel consumption of hydraulic exc...

Claims

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Application Information

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IPC IPC(8): E02F9/22
Inventor 张国通陆爱华张涛
Owner SUOTE TRANSMISSION EQUIP
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