Pressure compensation bulldozing hydraulic system of excavator

A pressure compensation and hydraulic system technology, which is applied to mechanically driven excavators/dredgers, fluid pressure actuators, mechanical equipment, etc., can solve the problems of not being able to satisfy the whole vehicle and not falling, and achieve pressure shock reduction, Avoid high-pressure oil circuit, good locking performance

Pending Publication Date: 2022-01-28
XCMG EXCAVATOR MACHINERY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an excavator pressure compensation bulldozer hydraulic system to solve the defect that the existing technology cannot meet the requirement that the excavator does not drop when supporting the vehicle for a long time

Method used

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  • Pressure compensation bulldozing hydraulic system of excavator

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Embodiment Construction

[0022] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] Such as figure 1 As shown, an excavator pressure compensation bulldozer hydraulic system is disclosed, comprising:

[0024] Variable displacement pump 3, the input end of the variable displacement pump 3 is externally connected to the hydraulic oil tank 1, the output end is connected to the main valve 5, and the output end of the main valve 5 is connected to the pressure compensation valve 6;

[0025] One of the oil passages of the pressure compensation valve 6 is connected to the two-way hydraulic lock 7 through the input end of the main valve 5, and the other oil passage is connected to the LS end of the variable pump 3, and the pressure compensation valve 6 makes the pressures of the two oil pressures equal; The oil return end of the ma...

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Abstract

The invention discloses a pressure compensation bulldozing hydraulic system of an excavator which comprises a variable pump, the input end of the variable pump is externally connected with a hydraulic oil tank, the output end of the variable pump is connected with a main valve, and the output end of the main valve is connected with a pressure compensation valve; one oil path of the pressure compensation valve is connected with a bidirectional hydraulic lock through the input end of the main valve, the other oil path is connected with the LS end of the variable pump, and the two oil paths are equal in pressure. The oil return end of the main valve is connected with the hydraulic oil tank. The system also includes a dozer blade oil cylinder, wherein a bidirectional hydraulic lock is connected with a rod cavity and a rodless cavity of the dozer blade oil cylinder; the bulldozing hydraulic system with the load sensitive function is built by adopting the Y-shaped main valve element with the meso-position function and being matched with the two-way hydraulic lock. When the dozer blade oil cylinder supports the vehicle, the system can enable the main valve element to return to the neutral position, the bidirectional hydraulic lock is closed instantly, the force for supporting the whole vehicle to be lifted is completely provided by high pressure in the dozer blade oil cylinder, and the locking performance of the bidirectional hydraulic lock is better.

Description

technical field [0001] The invention relates to an excavator pressure compensation bulldozer hydraulic system, which belongs to the technical field of excavator hydraulic pressure. Background technique [0002] At this stage, the bulldozer hydraulic system of small excavation hydraulics is generally a bulldozer hydraulic system without two-way hydraulic locks; [0003] The main hydraulic system consists of a main valve and a pressure compensation valve. The main valve is composed of a throttling part and a reversing part. When the pressure oil enters the main valve, it first passes through the valve throttling, passes through the pressure compensating valve, and finally acts on the hydraulic components through the valve reversing part; [0004] In order to increase the bulldozing function of the excavator, the small excavator is generally equipped with a bulldozer blade and a bulldozer hydraulic system. The existing bulldozer hydraulic system is generally a bulldozer hydraul...

Claims

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Application Information

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IPC IPC(8): F15B11/08E02F3/84F15B11/00
CPCF15B11/08F15B11/003E02F3/84F15B2211/20546F15B2211/605
Inventor 张飞赵鹏坤刘跃吉王震王荣标岳苏华潘赛赛王海成李金澎尚福利
Owner XCMG EXCAVATOR MACHINERY
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