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Three-way pressure compensator assembly

A three-way pressure and compensator technology, which is used in fluid pressure actuation devices, fluid pressure actuation system components, servo motor components, etc. Problems such as the working performance of the main engine, to achieve the effect of stable LS pressure control signal, stable spool movement, and elimination of peaks

Active Publication Date: 2017-01-04
广西中源机械有限公司 +2
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Problems solved by technology

However, due to the on-demand flow distribution of the quantitative load sensing system, it is necessary to consider the matching between the pilot handle and the main control valve, and the matching between the main control valve and the three-way pressure compensator. If the matching is not reasonable, the movement of the three-way pressure compensator will inevitably be unstable. , resulting in large fluctuations in system pressure, resulting in vibration of actuators and seriously affecting the performance of the main engine

Method used

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Embodiment Construction

[0021] The hydraulic principle diagram of the present invention is as image 3 as shown, image 3 The three-way pressure compensator assembly shown in the hydraulic system includes LS relief valve 31, filter 32, damping network 33, dynamic damping hole 34, oil inlet damping hole 35, three-way pressure compensator 36 and constant flow valve 37. The above hydraulic components are pressed image 3 The hydraulic schematic connections shown together form the three-way pressure compensator assembly.

[0022] according to image 3 The three-way pressure compensator assembly made in the hydraulic schematic diagram shown includes T port, LS port and P port. There is an LS overflow valve 31 connected between the T port and the LS port, and a connection between the T port and the LS port. There is a constant flow valve 37, and a three-way pressure compensator 36 is connected between the P port and the T port. The three-way pressure compensator 36 has two working positions. When the th...

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Abstract

The invention provides a three-way pressure compensator assembly. A three-way pressure compensator has two working positions. A spring cavity of the three-way pressure compensator is communicated with an LS port and a T port through a liquid resistance network and communicated with a P port through a dynamic damping hole. One end of the liquid resistance network is communicated with the T port, and the other end of the liquid resistance network is communicated with the LS port through a filter screen. A lower cavity of the three-way pressure compensator is communicated with the P port through a damping hole. The three-way pressure compensator assembly has the advantages that the half-bridge liquid resistance network, the dynamic damping hole and the oil inlet fixing damping hole are matched, stability of LS feedback pressure of the three-way pressure compensator is effectively achieved, it is guaranteed that a valve element of the three-way pressure compensator moves stably, and therefore stable flow division is achieved; the peak value of fluctuation of load pressure is effectively eliminated, pressure gains are reduced, and it is guaranteed that all actuators are stable; a quantitative load-sensitive system can achieve the functions that the flow is small when pressure is high and the flow is large when pressure is low.

Description

technical field [0001] The invention relates to a three-way pressure compensator. Especially related to the three-way pressure compensator assembly of the load sensitive system of construction machinery such as wheel loaders, cranes, and small excavators. Background technique [0002] Quantitative load sensing system is widely used in construction machinery such as loaders, truck cranes and small excavators because of its energy saving and low cost. The load-sensing multi-way reversing valve is the core component of this type of load-sensing system, and the quantitative load-sensing system needs to realize the on-demand distribution of actuator flow, and the three-way pressure compensator is an indispensable component of this type of hydraulic control system. Use the three-way pressure compensator and the load-sensing multi-way valve to cooperate with each other to make the load-sensing system realize the function of "high pressure and small flow, low pressure and large flo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/00F15B13/02
Inventor 肖华高名乾蒋拓高英达郭小龙吴军雷廷生李固刘彤徐尚国程伟
Owner 广西中源机械有限公司
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