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Method for flow saturation prevention control during simultaneous action of plurality of hydraulic execution mechanisms

An actuator and simultaneous action technology, applied in the direction of fluid pressure actuation devices, fluid pressure actuation system components, mechanical equipment, etc., can solve the problems of high price, hidden dangers of construction machinery construction safety, not fully grasping the core technology, etc. The effect of high reliability, easy implementation, and avoiding flow saturation problems

Inactive Publication Date: 2015-06-10
XUZHOU CONSTR MACHINERY INST XUZHOU CONSTR MACHINERY GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

Flow saturation will bring great safety hazards to construction machinery construction
[0003] In the existing technology, the methods for dealing with flow saturation are almost always improving the hydraulic system, introducing foreign new anti-flow saturation multi-way valves, or adopting the load independent flow distribution system (LUDV) developed by foreign companies, the price of these new equipment Expensive, it is a patented technology of some companies, the core technology has not been fully mastered in China, and its application has great limitations

Method used

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  • Method for flow saturation prevention control during simultaneous action of plurality of hydraulic execution mechanisms
  • Method for flow saturation prevention control during simultaneous action of plurality of hydraulic execution mechanisms
  • Method for flow saturation prevention control during simultaneous action of plurality of hydraulic execution mechanisms

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] Such as figure 1 and image 3 As shown, an anti-flow saturation control method when multiple hydraulic actuators act at the same time, the specific steps of the method are:

[0020] (1) The controller ECU reads the input signal of the electronic handle, and the manipulation range of the handle directly determines the movement speed of the actuator;

[0021] (2) Convert the handle input into the speed V of each actuator hi (i=1, 2,..., n); indicates the speed percentage value, and the controller ECU converts the voltage signal input by the electronic handle into the speed of each actuator after calculation (V h1 , V h2 ,...,V hn );

[0022] (3) Calculate the theoretical flow demand Q of each actuator according to the speed direction and the area of ​​each actuator i (i=1,2,…,n), get the total demand flow Q t =Q 1 +Q 2 +…+Q n ;

[0023] (4) Calculate the ma...

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Abstract

The invention discloses a method for flow saturation prevention control during the simultaneous action of a plurality of hydraulic execution mechanisms. The method comprises the following steps of: (1) reading an input signal of an electronic handle by using an electronic control unit (ECU); (2) converting the input of the handle into the speed of each executor; (3) calculating a theoretical flow demand Qi (i is 1, 2, ..., n) of each executor according to a speed direction and the area of the corresponding executor to obtain a total flow demand Qt=Q1+Q2+...+Qn; (4) calculating a maximum actual flow Qp which can be supplied by a hydraulic pump under such a working condition; (5) calculating a supply-demand ratio K=Qt / Qp; and (6) calculating a flow saturation prevention correction coefficient Ku, judging a value of K, determining that a flow is unsaturated and Ku=K, if K is less than or equal to 1, and determining the flow is saturated and Ku=1 / K, if K is more than 1. The method has the beneficial effect that the problem of flow saturation during the simultaneous action of a plurality of executors can be effectively solved.

Description

technical field [0001] The invention relates to an anti-flow saturation control method when multiple hydraulic actuators operate simultaneously, and belongs to the technical field of hydraulic control. Background technique [0002] In construction machinery, hydraulic systems driven by a single pump and controlled by multiple valves are widely used. These actuators have simultaneous high-speed operating conditions. When the total flow required by the system exceeds the flow that the pump can provide, the oil will give priority to ensuring the flow supply of the load with low pressure, while the load with high pressure will have flow at this time. Insufficient, even stops, shakes or violent shocks, so that the predetermined direction of motion cannot be guaranteed. This phenomenon is called traffic saturation. Flow saturation will bring great safety hazards to construction machinery construction. [0003] In the existing technology, the methods for dealing with flow satura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/08F15B11/16
Inventor 唐建林胡传正孔丽丽
Owner XUZHOU CONSTR MACHINERY INST XUZHOU CONSTR MACHINERY GRP
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