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Quick-change hydraulic system capable of automatically controlling pressure and flow

A technology of hydraulic system and flow, applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, servo motors, etc., can solve the problems of small clamping force, slow speed of quick change system, etc., to meet hydraulic requirements, improve Effect of extension speed and clamping force

Pending Publication Date: 2021-10-19
XCMG EXCAVATOR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a quick-change hydraulic system with automatic pressure and flow control, which solves the problems of slow speed and small clamping force of the quick-change system

Method used

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  • Quick-change hydraulic system capable of automatically controlling pressure and flow

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Embodiment Construction

[0012] In order to further illustrate the technical details and advantages of the present invention, it will now be described in conjunction with the accompanying drawings.

[0013] Such as figure 1 As shown, a pressure and flow automatic control quick-change hydraulic system includes a main valve assembly 5, a main pump assembly, a quick-change assembly and a controller 14, the main pump assembly includes a main pump A and a main pump B, and the The main valve assembly includes a main valve A and a main valve B, the main pump A is connected to the main valve A through a hydraulic pipeline, and the main pump B is connected to the main valve B through a hydraulic pipeline; the quick change assembly It includes a quick-change reversing valve 10 and a quick-change oil cylinder 9. The oil inlet of the quick-change reversing valve 10 is connected to the main pump B and the main valve B through a hydraulic pipeline; the input end of the controller 14 is connected to A quick-change ...

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Abstract

A quick-change hydraulic system capable of automatically controlling pressure and flow comprises a main valve assembly, a main pump assembly, a quick-change assembly and a controller, the main pump assembly comprises a main pump A and a main pump B, the main valve assembly comprises a main valve A and a main valve B, the main pump A is connected with the main valve A through a hydraulic pipeline, and the main pump B is connected with the main valve B through a hydraulic pipeline; an input end of the controller is connected with a quick-change operation switch which is connected with a quick-change reversing valve coil; an output end of the controller is connected with the main pump B and the main valve B; and a control signal of the quick-change control switch is introduced into the controller, so that during quick-change operation, the controller sends a control instruction to a main pump control proportional valve and a main valve loading valve at the same time to output flow, the hydraulic requirement of the quick-change system is met, the extending speed and clamping force of a quick-change oil cylinder are increased, and meanwhile, according to different quick-change machines and tools, different flows and pressures are output, and the energy-saving effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of quick-change hydraulic systems for excavators, in particular to a quick-change hydraulic system with automatic pressure and flow control. Background technique [0002] At present, there are mainly two schemes for quick-change hydraulic systems of excavators in China. One is that the pilot pump supplies oil to the quick-change system. The disadvantage is that the clamping force of the quick-change fixture is too small and the performance is unreliable. One is that the main valve supplies oil to the quick change system. The disadvantage is that when the quick change operation is performed, all the spools are in the neutral position. At this time, the pressure of the main valve is unloaded and there is no pilot signal in the pipeline. For energy-saving design, the controller Automatically reduce the displacement of the main pump to the minimum, resulting in slow quick change operation speed and small clampi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/04F15B21/02
CPCF15B11/08F15B13/04F15B21/02F15B2211/20576
Inventor 崔广伟李乾坤蔡振旭
Owner XCMG EXCAVATOR MACHINERY
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